Lubrication maintenance hoists occupies an important proportion of device management is an important aspect of the hearts of some people may have this question:load chain Why chain hoists require lubrication? Today for everyone to unlock this mystery:
Lubrication in mechanical transmission plays an important role, it can affect the performance of the whole chain
lever hoist , precision, and life expectancy, since the development of human self-awareness to the motion and friction, wear and lubrication of the close relationship, with the development of modern industry, the more the more devices to the pursuit of a high, high efficiency, energy saving and reliable, which lead to mechanical friction in this portion of the more severe conditions, lubrication at this time was extremely important, and in many cases, a sophisticated technology is the key, lubrication only then is the "refueling method" problem, but also in the master friction, wear, lubrication and laws of nature,manual block in addition to the research and development to enhance lubrication.
After more than a comprehensive analysis of equipment lubrication, I believe you set for the device recognizes the importance of lubrication where, therefore, the opponent pull hoist lubrication from now on.
plate lifting clamp
2013年8月26日星期一
Steel cord before using the hoist installation and commissioning
Electric wire
rope hoist before use in order to ensure safe use, customers also need to make simple commissioning work, the following details for you:
Electric wire rope hoist components are: motor, transmission, drum and rope four parts. The position of the motor and the roll can be divided into four types, different types have their advantages and disadvantages.
(A) motor axis is perpendicular to the axis of the hoist drum worm gear used, the width large size, structure is more cumbersome. This structure appears early in love, has no such type.
(2) The motor axis parallel to the roll axis, this structure is the biggest advantage of the electric hoist height and length dimensions. Disadvantage is the width dimension, manufacturing and assembly of complex, large orbital turning radius is large.
(3) motor mounted on the inside of the wire rope manual hoist drum hoist, the length dimension is small, relatively compact structure. But the motor heat is not good, if there are problems inspection, installation, maintenance, motor is not easy.
(4) motor mounted on the outside of the drum hoist, this way, to change the motor heat is not good for a big disadvantage, but also more convenient installation and maintenance easy. But the length of the large size, is not suitable for places where space is limited.
Electric wire rope hoist installation should pay attention to the following aspects:
Electric wire rope hoist mobile use of the track, I-beam by the user according to GB706-88 standard design of their own choice. Install a small car to be adjusted by adjusting the washer to ensure the orbital rim 3 ~ 5mm gap between the edge of the can.
Fixed hoist should be installed to ensure proper security methods, cage safe and reliable.
About electric hoist electrical installation, please refer to "steel cord electric hoist for Circuit" to install appliances.
Off the fire stopper is adjusted by adjusting the stopper rod two hit the block to achieve, loosen the screws on the block hit, hit the block divided into guide rope on both sides of card board,load chain card board can move freely promote collision block . Start the motor starts to lift, push cap-bit card board hit the block moves, rose to hook pulley shell casing along a distance roll under 150mm ~ 50mm, stop up, move down buttons, rope guide moves back 10mm or so, Move down hit the block near the upper limit card board, tighten the bolts can be.
Electric wire rope hoist components are: motor, transmission, drum and rope four parts. The position of the motor and the roll can be divided into four types, different types have their advantages and disadvantages.
(A) motor axis is perpendicular to the axis of the hoist drum worm gear used, the width large size, structure is more cumbersome. This structure appears early in love, has no such type.
(2) The motor axis parallel to the roll axis, this structure is the biggest advantage of the electric hoist height and length dimensions. Disadvantage is the width dimension, manufacturing and assembly of complex, large orbital turning radius is large.
(3) motor mounted on the inside of the wire rope manual hoist drum hoist, the length dimension is small, relatively compact structure. But the motor heat is not good, if there are problems inspection, installation, maintenance, motor is not easy.
(4) motor mounted on the outside of the drum hoist, this way, to change the motor heat is not good for a big disadvantage, but also more convenient installation and maintenance easy. But the length of the large size, is not suitable for places where space is limited.
Electric wire rope hoist installation should pay attention to the following aspects:
Electric wire rope hoist mobile use of the track, I-beam by the user according to GB706-88 standard design of their own choice. Install a small car to be adjusted by adjusting the washer to ensure the orbital rim 3 ~ 5mm gap between the edge of the can.
Fixed hoist should be installed to ensure proper security methods, cage safe and reliable.
About electric hoist electrical installation, please refer to "steel cord electric hoist for Circuit" to install appliances.
Off the fire stopper is adjusted by adjusting the stopper rod two hit the block to achieve, loosen the screws on the block hit, hit the block divided into guide rope on both sides of card board,load chain card board can move freely promote collision block . Start the motor starts to lift, push cap-bit card board hit the block moves, rose to hook pulley shell casing along a distance roll under 150mm ~ 50mm, stop up, move down buttons, rope guide moves back 10mm or so, Move down hit the block near the upper limit card board, tighten the bolts can be.
2013年8月23日星期五
Affect the price of the main factors hoist
In recent years, the rapid development of electric hoist enterprises to major hoist increasingly fierce competition between companies,wire rope winch faced with a variety of model specifications on the market of electric hoist, the same products in the price is also quite different, then what factors electric hoist price differences, the following according to the current market situation, summed up the following for your reference:
First; accompanied by the development of technology, new products, new technology is always the pursuit of each enterprise, in order to improve their own strength, electric hoist update production equipment is essential, vigorously develop new electric hoist, thus increasing the cost of production inputs, which are electric hoist prices an important factor.
Secondly; With the steel market prices continue to rise,load chain a direct result of the rise in raw material hoist, electric hoist resulting price increase.
Finally; lifting an increasingly competitive industry, electric hoist manufacturers endless enterprises to ensure the quality of the premise, to provide quality services, to a certain extent, also the electric hoist prices growth.
The above three points are rigid hoist the main factor prices, once again reminded the majority of new and old customers to buy other small electric hoist lifting equipment when not too much emphasis on price,chain block product quality is one of the fundamental safety.
First; accompanied by the development of technology, new products, new technology is always the pursuit of each enterprise, in order to improve their own strength, electric hoist update production equipment is essential, vigorously develop new electric hoist, thus increasing the cost of production inputs, which are electric hoist prices an important factor.
Secondly; With the steel market prices continue to rise,load chain a direct result of the rise in raw material hoist, electric hoist resulting price increase.
Finally; lifting an increasingly competitive industry, electric hoist manufacturers endless enterprises to ensure the quality of the premise, to provide quality services, to a certain extent, also the electric hoist prices growth.
The above three points are rigid hoist the main factor prices, once again reminded the majority of new and old customers to buy other small electric hoist lifting equipment when not too much emphasis on price,chain block product quality is one of the fundamental safety.
Electric hoist motors appear unbalanced three-phase power causes
Most electric hoist three-phase voltage is used,chain Block but the process of using some of the fault is due to current imbalance caused, then the motor appears unbalanced three-phase power What is the reason, how should we avoid such failure causes electric hoist it ?
When the basic symmetrical three-phase power, the asynchronous motor at the rated voltage of the three-phase load current, any one phase and the average deviation of not greater than the average of 10%. Therefore, only the three-phase voltage imbalance is too large, or electric lift hoist motor itself in case there is a fault, the motor phase current imbalance will appear.load chain The possible reasons are:
1, three-phase power supply voltage unbalance caused by electric hoist motor phase current imbalance.
2, the motor windings shorted.
3, the inner part of the stator winding coil reversed.
4, the three-phase windings of the motor are not equal.
5, the winding circuit.
When the basic symmetrical three-phase power, the asynchronous motor at the rated voltage of the three-phase load current, any one phase and the average deviation of not greater than the average of 10%. Therefore, only the three-phase voltage imbalance is too large, or electric lift hoist motor itself in case there is a fault, the motor phase current imbalance will appear.load chain The possible reasons are:
1, three-phase power supply voltage unbalance caused by electric hoist motor phase current imbalance.
2, the motor windings shorted.
3, the inner part of the stator winding coil reversed.
4, the three-phase windings of the motor are not equal.
5, the winding circuit.
2013年8月19日星期一
Electric hoist equipment management prevention system
Strengthen preventive electric hoist equipment management system to reduce accidents, to ensure personal safety and work efficiency
1, strengthening the electric hoist and trolley equipment safety management. For electric hoist and other small mechanical characteristics, should develop detailed safety rules and regulations, management system, ledger to complete. For electric hoist, and other special equipment should be regularly organized professional security inspection, investigation equipment problems, the problems identified should be implemented for the responsible units and persons responsible for coming up with feasible deadline for rectification and reform proposals. Functional departments of the rectification of the implementation, feedback and evaluation.
2, electric manual block machinery and equipment for strengthening safety management practitioners. Strengthen education and training, improve operator safety awareness, safety skills to master, compliance, strict compliance with safety procedures and other safety management system.
3, to strengthen the security of field personnel operating process management. Operation process safety management is in the process of production maintenance operations, through the process elements, the object element, time elements and spatial elements of system control, eliminating that may arise during the operation of the various dangers and harmful factors, to achieve safe production goals the key is to ensure the safety of the whole operation process specification, and reasonable. Process validation system is to require operators to determine, identify, act as a fixed mode of thinking, that is, in the course of operations are recognized by a certain way of operating, thus avoiding accidents.
4, to strengthen the mechanical hoist equipment management. From the design, manufacture, installation, maintenance and other aspects of strict control, timely elimination of hazards,load chain to ensure intrinsically safe equipment, through technical means to improve the degree of intrinsic safety equipment; equipment body meet safety technical requirements, safety accessory devices should be complete and effective.
1, strengthening the electric hoist and trolley equipment safety management. For electric hoist and other small mechanical characteristics, should develop detailed safety rules and regulations, management system, ledger to complete. For electric hoist, and other special equipment should be regularly organized professional security inspection, investigation equipment problems, the problems identified should be implemented for the responsible units and persons responsible for coming up with feasible deadline for rectification and reform proposals. Functional departments of the rectification of the implementation, feedback and evaluation.
2, electric manual block machinery and equipment for strengthening safety management practitioners. Strengthen education and training, improve operator safety awareness, safety skills to master, compliance, strict compliance with safety procedures and other safety management system.
3, to strengthen the security of field personnel operating process management. Operation process safety management is in the process of production maintenance operations, through the process elements, the object element, time elements and spatial elements of system control, eliminating that may arise during the operation of the various dangers and harmful factors, to achieve safe production goals the key is to ensure the safety of the whole operation process specification, and reasonable. Process validation system is to require operators to determine, identify, act as a fixed mode of thinking, that is, in the course of operations are recognized by a certain way of operating, thus avoiding accidents.
4, to strengthen the mechanical hoist equipment management. From the design, manufacture, installation, maintenance and other aspects of strict control, timely elimination of hazards,load chain to ensure intrinsically safe equipment, through technical means to improve the degree of intrinsic safety equipment; equipment body meet safety technical requirements, safety accessory devices should be complete and effective.
Lifting hooks scrapped relevant standards
Lifting hooks scrapped relevant standards
1, the torsional deformation 超过 is 10 °.
2, after welding the hook when worn.
3, the opening degree of increase in size than the original 15%.
4, the hook surface cracks.
5, the dangerous section or plastically deformed hook neck.
6, the size of the hook shank corrosion is less than 90% of the original size.
7, wear dangerous section of 10% of the original size.
8, when a crack tail root rib.
9, the sheet has lateral deformation of the hook plate,lever hoist when the deformation of the bending radius is greater than 20 times the thickness, the hook must be replaced film.
10, sheet hook up spindle wear 5% of the original size, should be scrapped mandrel.
11, the wear plate wear plate hook up to 50% of the original size,load chain should be scrapped wear plate.
12, the sheet bushing wear hook up to 50% of the original size,manual block the bushing should be scrapped.
1, the torsional deformation 超过 is 10 °.
2, after welding the hook when worn.
3, the opening degree of increase in size than the original 15%.
4, the hook surface cracks.
5, the dangerous section or plastically deformed hook neck.
6, the size of the hook shank corrosion is less than 90% of the original size.
7, wear dangerous section of 10% of the original size.
8, when a crack tail root rib.
9, the sheet has lateral deformation of the hook plate,lever hoist when the deformation of the bending radius is greater than 20 times the thickness, the hook must be replaced film.
10, sheet hook up spindle wear 5% of the original size, should be scrapped mandrel.
11, the wear plate wear plate hook up to 50% of the original size,load chain should be scrapped wear plate.
12, the sheet bushing wear hook up to 50% of the original size,manual block the bushing should be scrapped.
2013年8月16日星期五
Import and export of engineering and hoisting machinery presented five characteristics
This year, the world is facing economic recession, countries hit by the financial storm environment, the country has implemented the macro-control policies, resulting in resource commodities and labor-intensive merchandise exports fall, but due to national infrastructure continuity and long-term, therefore mainly used for infrastructure construction projects and the demand for lifting a limited impact in the near future.
Meanwhile, the world is facing increasing scarcity of non-renewable resources and food security strategic position valued economic environment, engineering and hoisting machinery in the development of mineral resources and the development of economic activities in the food industry will have its uses, so their needs have greater space for our engineering and lift hoist machinery import and export is facing rare opportunities for development, import and export trade has shown rapid growth. Engineering and hoisting machinery import and export features:
1 Engineering and lifting the fifth consecutive year export growth rate higher than the growth rate of export of electromechanical products.
Although our engineering and hoisting machinery import and export trade import and export of electromechanical products accounted for the proportion of low, about 2%, but the engineering and hoist equipment import and export of general trade, processing trade, lower proportion; most export products own brand and cost competitiveness; obtain national policy support, so construction and agricultural machinery with export base and high growth potential.
(2) Engineering and lifting the fourth consecutive year trade surplus.
Engineering and lifting import and export trade deficit before 2004 were started in 2005 to achieve a trade surplus and the trade surplus increased every year. Engineering and lifting a gradual increase product awareness, increase international market share year after year is a major factor in generating trade surpluses. Foreign-invested enterprises and enterprises to innovate products to replace imported products trade deficit into a trade surplus in recent years, another important factor.
3 Engineering and lifting machinery manufacturers of spare parts for global sourcing.
At present, China spare parts industry is still unable to meet the needs of machine manufacturers, especially in the engine, hydraulic systems and other core parts and components. Therefore, some companies have financial strength to recognize their lack of original supply chain, and actively with international top parts suppliers to cooperate to achieve the overall use of global sourcing to enhance the quality, to seize the international market share. Meanwhile, engineering and hoisting machinery parts exports will be more, showing parts manufacturing system into the international trend.
4 Engineering and lifting substantial growth in exports to emerging markets.
In the world economy is not stable, when the majority of developing countries, the situation is not bad, Chinese engineers and crane products are relatively low grade, high cost, have a good market in developing countries is reflected in China to Russia and other CIS member countries, Africa and other developing regions, ASEAN's exports is still rapid growth.
5 Engineering and lifting import and export agency still promoted.
Engineering and lifting with a number of base, technological innovation and strong exports of the main force. These companies have their own brand products, with international leadership and vision to fight international marketing talent, after years of development, has gradually emerged in the international market. But the state of export enterprises decentralized management can not be ignored, most enterprises have business instability, inefficient and unable to carry out service and other operating defects. Few export enterprises in the international market to take acts of unfair competition also on the "Made in China" products cause adverse effects.load chain As engineering and hoisting machinery import and export urgent need to establish a sound service system, and in the course of personal safety factors involved, we recommend that an appropriate increase in import and export business of barriers to entry.
Meanwhile, the world is facing increasing scarcity of non-renewable resources and food security strategic position valued economic environment, engineering and hoisting machinery in the development of mineral resources and the development of economic activities in the food industry will have its uses, so their needs have greater space for our engineering and lift hoist machinery import and export is facing rare opportunities for development, import and export trade has shown rapid growth. Engineering and hoisting machinery import and export features:
1 Engineering and lifting the fifth consecutive year export growth rate higher than the growth rate of export of electromechanical products.
Although our engineering and hoisting machinery import and export trade import and export of electromechanical products accounted for the proportion of low, about 2%, but the engineering and hoist equipment import and export of general trade, processing trade, lower proportion; most export products own brand and cost competitiveness; obtain national policy support, so construction and agricultural machinery with export base and high growth potential.
(2) Engineering and lifting the fourth consecutive year trade surplus.
Engineering and lifting import and export trade deficit before 2004 were started in 2005 to achieve a trade surplus and the trade surplus increased every year. Engineering and lifting a gradual increase product awareness, increase international market share year after year is a major factor in generating trade surpluses. Foreign-invested enterprises and enterprises to innovate products to replace imported products trade deficit into a trade surplus in recent years, another important factor.
3 Engineering and lifting machinery manufacturers of spare parts for global sourcing.
At present, China spare parts industry is still unable to meet the needs of machine manufacturers, especially in the engine, hydraulic systems and other core parts and components. Therefore, some companies have financial strength to recognize their lack of original supply chain, and actively with international top parts suppliers to cooperate to achieve the overall use of global sourcing to enhance the quality, to seize the international market share. Meanwhile, engineering and hoisting machinery parts exports will be more, showing parts manufacturing system into the international trend.
4 Engineering and lifting substantial growth in exports to emerging markets.
In the world economy is not stable, when the majority of developing countries, the situation is not bad, Chinese engineers and crane products are relatively low grade, high cost, have a good market in developing countries is reflected in China to Russia and other CIS member countries, Africa and other developing regions, ASEAN's exports is still rapid growth.
5 Engineering and lifting import and export agency still promoted.
Engineering and lifting with a number of base, technological innovation and strong exports of the main force. These companies have their own brand products, with international leadership and vision to fight international marketing talent, after years of development, has gradually emerged in the international market. But the state of export enterprises decentralized management can not be ignored, most enterprises have business instability, inefficient and unable to carry out service and other operating defects. Few export enterprises in the international market to take acts of unfair competition also on the "Made in China" products cause adverse effects.load chain As engineering and hoisting machinery import and export urgent need to establish a sound service system, and in the course of personal safety factors involved, we recommend that an appropriate increase in import and export business of barriers to entry.
Periodic examination of special equipment
(A) Conditions
Special equipment for periodic inspection, in addition to the necessary equipment ready for data, but also should have the following basic requirements:
1 was seized equipment in accordance with the provisions of the clean-up, costumes, media drained,chain block and with other related equipment for the reliable isolation;
2 containing flammable, toxic equipment for the replacement, and, disinfection, cleaning, and maintaining of qualified;
3 need to open, disassemble, has been completed in accordance with regulations;
4, high-temperature cooling device has been reliably meet the conditions of work;
5. Need to set up quarantine, isolation has been carried out, and set up safety signs;
6 Prepare the required power, water and other energy sources;
7 Determine the coordination and monitoring personnel, security measures.
8 large equipment on larger quantities or periodical surveys, you need to set the scene inspection office space should be provided office space.
The establishment of specialized inspection and testing base for mobile devices periodic inspection, and its preparation work is generally carried out by the inspection agency, applicant be required.
Specific conditions and requirements, see special equipment associated periodic inspection rules of technical safety.
(Two) Implementing Agency
AQSIQ approved special equipment inspection and testing organizations.
Specific implementing agencies by the State Administration of Quality Supervision, Provincial Quality and Technical Supervision plan to the public.
(Three) Program
Periodic inspection including application of special equipment, periodic inspection,load chain an inspection report and other procedures:
1 Applicants
The use of special equipment should be in accordance with production units and equipment, regular inspection cycle, make arrangements for inspection plan and the tax return (on relevant sites download), apply to the inspection and testing institutions, return the device at the same time submit registration authorities.
(2) accept
Following a review of inspection and testing agency qualified to be accepted, arrange inspection and notify the applicant; does not comply with the conditions of, and the reasons inadmissible.
3 periodic inspection
Site inspection, the use of units shall be equipped with personnel monitoring and coordination, and prepare the following information:
(A) equipment archives;
(2) equipment operation, maintenance and other records.
Inspection agency shall arrange to meet the requirements of the inspection personnel regularly inspected.
Periodic inspection in accordance with the relevant rules of special equipment for periodic inspection.
4 inspection report
Inspection and testing institutions tested for safety equipment performance evaluation, inspection reports issued by the appropriate certificate or; Upon examination, found that there are hidden dangers need to be improved, sentenced to waste, it should be reported to the local quality and technical supervision departments.
(Five) deadline
1. Equipment safety inspection unit shall before the expiry of one month to the inspection agencies inspection applications. Receiving inspection and testing institution shall declare in 5 working days to make arrangements to receive and plan to ensure timely completion of periodic inspection.
(2) periodic inspection work is completed, general equipment should be 10 working days to issue a periodic inspection report or certificate, large equipment can be 30 working days of an inspection report or certificate.wire rope hoist On the need for timely inspection equipment put into operation, inspection and testing agency personnel engaged in inspection work is completed within 5 days after, issued by the periodic inspection and preliminary conclusions representations responsible.
3 Use the unit on the test disagrees with the conclusion, you can receive the inspection report (or preliminary conclusions representations) within 15 working days after written comments.
Special equipment for periodic inspection, in addition to the necessary equipment ready for data, but also should have the following basic requirements:
1 was seized equipment in accordance with the provisions of the clean-up, costumes, media drained,chain block and with other related equipment for the reliable isolation;
2 containing flammable, toxic equipment for the replacement, and, disinfection, cleaning, and maintaining of qualified;
3 need to open, disassemble, has been completed in accordance with regulations;
4, high-temperature cooling device has been reliably meet the conditions of work;
5. Need to set up quarantine, isolation has been carried out, and set up safety signs;
6 Prepare the required power, water and other energy sources;
7 Determine the coordination and monitoring personnel, security measures.
8 large equipment on larger quantities or periodical surveys, you need to set the scene inspection office space should be provided office space.
The establishment of specialized inspection and testing base for mobile devices periodic inspection, and its preparation work is generally carried out by the inspection agency, applicant be required.
Specific conditions and requirements, see special equipment associated periodic inspection rules of technical safety.
(Two) Implementing Agency
AQSIQ approved special equipment inspection and testing organizations.
Specific implementing agencies by the State Administration of Quality Supervision, Provincial Quality and Technical Supervision plan to the public.
(Three) Program
Periodic inspection including application of special equipment, periodic inspection,load chain an inspection report and other procedures:
1 Applicants
The use of special equipment should be in accordance with production units and equipment, regular inspection cycle, make arrangements for inspection plan and the tax return (on relevant sites download), apply to the inspection and testing institutions, return the device at the same time submit registration authorities.
(2) accept
Following a review of inspection and testing agency qualified to be accepted, arrange inspection and notify the applicant; does not comply with the conditions of, and the reasons inadmissible.
3 periodic inspection
Site inspection, the use of units shall be equipped with personnel monitoring and coordination, and prepare the following information:
(A) equipment archives;
(2) equipment operation, maintenance and other records.
Inspection agency shall arrange to meet the requirements of the inspection personnel regularly inspected.
Periodic inspection in accordance with the relevant rules of special equipment for periodic inspection.
4 inspection report
Inspection and testing institutions tested for safety equipment performance evaluation, inspection reports issued by the appropriate certificate or; Upon examination, found that there are hidden dangers need to be improved, sentenced to waste, it should be reported to the local quality and technical supervision departments.
(Five) deadline
1. Equipment safety inspection unit shall before the expiry of one month to the inspection agencies inspection applications. Receiving inspection and testing institution shall declare in 5 working days to make arrangements to receive and plan to ensure timely completion of periodic inspection.
(2) periodic inspection work is completed, general equipment should be 10 working days to issue a periodic inspection report or certificate, large equipment can be 30 working days of an inspection report or certificate.wire rope hoist On the need for timely inspection equipment put into operation, inspection and testing agency personnel engaged in inspection work is completed within 5 days after, issued by the periodic inspection and preliminary conclusions representations responsible.
3 Use the unit on the test disagrees with the conclusion, you can receive the inspection report (or preliminary conclusions representations) within 15 working days after written comments.
2013年8月14日星期三
Crane safety checks general components
(1) hook.
Check the hook marks and anti-off device meets the requirements, hook cracks, delamination and other defects;wire rope hoist hook wear section, the opening degree of the increase in the amount of torsional deformation is exceeded; hook neck and face without fatigue deformation, cracks and associated pin, sleeve wear.
(2) rope.
Check the wire rope specifications, models and matching reel pulley meets the design requirements. Rope fixed end plate, Shengka, wedge blocks, etc. rope fixtures meet the requirements.load chain Rope wear, broken wires, kinking, flattening, bending, off shares, corrosion, etc. are exceeded.
(3) brake.
Set the brake, the brake of the type meets the design requirements, the brake lever, the spring without fatigue deformation, cracks and other defects; pins, spindles, brake wheel, brake linings for wear exceeded, hydraulic brake oil leaks ; brake gap adjustment, braking capacity can meet the requirements.
(4) roll.
Roll body, tube edge without fatigue cracks, damage, etc.; rope groove and the cylinder wall wear is excessive; reel flange height and rope winding layers can match; guide rope, rope work schedule meets requirements;
(5) the pulley.
Is there a retaining rope pulley groove means; pulley rope groove, rim cracks, broken edges, excessive wear and other conditions, pulley rotation is flexible.
(6) reducer.
Gearhead runtime without intense metal friction sound, vibration, radiation and other unusual sound shell; shaft is sealed intact,manual hoist loose bolts and other conditions have defects; gear lubricant selection, the oil surface height, vertical gear lubrication pump running, open gear lubrication compliance.
(7) wheels.
Wheel tread, axle whether fatigue crack phenomenon axle wheel tread wear is excessive. Are there eating track running phenomenon. Caused by gnawing track what is the reason.
(8) couplings.
Coupling parts without defects, loose connections, run the impact of the phenomenon. Couplings, pin, shaft pin hole, the buffer rubber ring wear is excessive. Coupling and the connection of the two parts are concentric.
4.4 Crane safety device checks
(1) overload protection device.
Overload protection devices are sensitive and reliable, meet the design requirements, hydraulic overload protection device opening pressure; machinery, electronics and integrated overload protection alarm, cut off the power source set-point integrated error compliance.
(2) torque limiter.
Type torque limiter is jib crane from tipping against overload safety device. Weight gain through increased law or sensitive and reliable method for detecting torque limiter and check torque limiter alarm,chain block cut off the power source set-point integrated error is within the specified range.
(3) limit position limiter.
Check the luffing mechanism lifting equipment, lifting mechanism, operating mechanism reaches the set position signal from the alarm can automatically cut off the power to run the risk of the source direction.
(4) wind devices.
Boom hinge point for the roots of the crane height greater than 50 meters should be checked anemometer, wind speed setpoint is reached or when the ability to accurately operating limit speed alarm. Outdoor work in orbit crane rail clamp should be checked, iron shoes, anchoring device of the parts are deformed, defects, and the reliability of its work independently. For automatic rail clamp, you should check for sudden wind gusts devices and carts running with the realization of non-anchor brake state windproof function and reliability of the electrical interlock switch function.
(5) after anti-tipping devices.
The boom and luffing jib crane type reclining device should be checked against the reliability of electrical interlock sensitivity, check the location and magnitude of amplitude indicator indication accuracy.
(6) buffers.
From the weight of different types, running at different speeds of the crane, you should check whether the configured buffer matches and check the integrity of the buffer, run to the ends can simultaneously touch the stopper.
(7) protection.
Check the crane and the various shields, barriers, guards, ladders, etc. are complete, reliable, crane exposed may cause wound wounding, open drive; couplings, sprockets, chains, belts and other rotating parts without protective cover, Crane Master walkways, ladders, and may result in the exposed parts without barriers, whether it meets the requirements. Open for crane electrical equipment should be located rain cover.
Check the hook marks and anti-off device meets the requirements, hook cracks, delamination and other defects;wire rope hoist hook wear section, the opening degree of the increase in the amount of torsional deformation is exceeded; hook neck and face without fatigue deformation, cracks and associated pin, sleeve wear.
(2) rope.
Check the wire rope specifications, models and matching reel pulley meets the design requirements. Rope fixed end plate, Shengka, wedge blocks, etc. rope fixtures meet the requirements.load chain Rope wear, broken wires, kinking, flattening, bending, off shares, corrosion, etc. are exceeded.
(3) brake.
Set the brake, the brake of the type meets the design requirements, the brake lever, the spring without fatigue deformation, cracks and other defects; pins, spindles, brake wheel, brake linings for wear exceeded, hydraulic brake oil leaks ; brake gap adjustment, braking capacity can meet the requirements.
(4) roll.
Roll body, tube edge without fatigue cracks, damage, etc.; rope groove and the cylinder wall wear is excessive; reel flange height and rope winding layers can match; guide rope, rope work schedule meets requirements;
(5) the pulley.
Is there a retaining rope pulley groove means; pulley rope groove, rim cracks, broken edges, excessive wear and other conditions, pulley rotation is flexible.
(6) reducer.
Gearhead runtime without intense metal friction sound, vibration, radiation and other unusual sound shell; shaft is sealed intact,manual hoist loose bolts and other conditions have defects; gear lubricant selection, the oil surface height, vertical gear lubrication pump running, open gear lubrication compliance.
(7) wheels.
Wheel tread, axle whether fatigue crack phenomenon axle wheel tread wear is excessive. Are there eating track running phenomenon. Caused by gnawing track what is the reason.
(8) couplings.
Coupling parts without defects, loose connections, run the impact of the phenomenon. Couplings, pin, shaft pin hole, the buffer rubber ring wear is excessive. Coupling and the connection of the two parts are concentric.
4.4 Crane safety device checks
(1) overload protection device.
Overload protection devices are sensitive and reliable, meet the design requirements, hydraulic overload protection device opening pressure; machinery, electronics and integrated overload protection alarm, cut off the power source set-point integrated error compliance.
(2) torque limiter.
Type torque limiter is jib crane from tipping against overload safety device. Weight gain through increased law or sensitive and reliable method for detecting torque limiter and check torque limiter alarm,chain block cut off the power source set-point integrated error is within the specified range.
(3) limit position limiter.
Check the luffing mechanism lifting equipment, lifting mechanism, operating mechanism reaches the set position signal from the alarm can automatically cut off the power to run the risk of the source direction.
(4) wind devices.
Boom hinge point for the roots of the crane height greater than 50 meters should be checked anemometer, wind speed setpoint is reached or when the ability to accurately operating limit speed alarm. Outdoor work in orbit crane rail clamp should be checked, iron shoes, anchoring device of the parts are deformed, defects, and the reliability of its work independently. For automatic rail clamp, you should check for sudden wind gusts devices and carts running with the realization of non-anchor brake state windproof function and reliability of the electrical interlock switch function.
(5) after anti-tipping devices.
The boom and luffing jib crane type reclining device should be checked against the reliability of electrical interlock sensitivity, check the location and magnitude of amplitude indicator indication accuracy.
(6) buffers.
From the weight of different types, running at different speeds of the crane, you should check whether the configured buffer matches and check the integrity of the buffer, run to the ends can simultaneously touch the stopper.
(7) protection.
Check the crane and the various shields, barriers, guards, ladders, etc. are complete, reliable, crane exposed may cause wound wounding, open drive; couplings, sprockets, chains, belts and other rotating parts without protective cover, Crane Master walkways, ladders, and may result in the exposed parts without barriers, whether it meets the requirements. Open for crane electrical equipment should be located rain cover.
"Crane wire rope installation and testing practical norms" national standards GBT5972
State regulations should be considered as a consumable wire rope, when test showed its strength has been reduced to continue to use dangerous, that should be scrapped.
1. Installation
a) The new replacement rope rope should generally be the same type as the original, with the specifications.hoist and trolley If you use different types of wire rope shall ensure that not less than the original replacement wire rope wire rope performance.
b) respond rope through the pulley groove pulley block with radius gauge to accurately measure and record, while using the rope reel inverted dish installation method, that is, from the original tape to be unwound wire rope and wooden wheels on the plate while wearing steel shaft, placed in two dedicated steel frame, while rotating back plate, in order to eliminate the stress generated rope.
c) when installing wire rope,load chain wire rope should be prevented from fighting ring, kink, bend or glue harmful debris.
d) If the wire rope load when certain parts and mechanical friction, you should be able to access the site will be properly protected.
2. Test
a) The user requirements can do regularly observe and record;
b) for lifting the molten or red hot metal, acid, explosives, toxic substances lifting rope, required to check twice a week, usually at least once a month lifting machinery (refer to building site crane) expected rope can be more long-term work of lifting machinery, checked at least once a month;
c) Wire rope inspection site, usually full-length tests, but mainly check the following parts:
* Fixed rope movement and the whole story ends.
* Through the pulley block or bypass pulley rope segment, the mechanical performance of repetitive tasks case, you should pay particular attention to mechanical pulley hanging out around any part of the period.
* Located balance rope pulley rope segment or easy to wear rope segments.
* Rope end portion (crimp rope end buckle rope ends,lift hoist wedge rope end fittings, rope clamp strong side, the pressure pull fixed rope end)
* For use pressed or forged steel rope clamp Si Shengsheng Folder To examine whether there are cracks and use of materials in the presence or absence of the wire rope and rope slip between folders.
1. Installation
a) The new replacement rope rope should generally be the same type as the original, with the specifications.hoist and trolley If you use different types of wire rope shall ensure that not less than the original replacement wire rope wire rope performance.
b) respond rope through the pulley groove pulley block with radius gauge to accurately measure and record, while using the rope reel inverted dish installation method, that is, from the original tape to be unwound wire rope and wooden wheels on the plate while wearing steel shaft, placed in two dedicated steel frame, while rotating back plate, in order to eliminate the stress generated rope.
c) when installing wire rope,load chain wire rope should be prevented from fighting ring, kink, bend or glue harmful debris.
d) If the wire rope load when certain parts and mechanical friction, you should be able to access the site will be properly protected.
2. Test
a) The user requirements can do regularly observe and record;
b) for lifting the molten or red hot metal, acid, explosives, toxic substances lifting rope, required to check twice a week, usually at least once a month lifting machinery (refer to building site crane) expected rope can be more long-term work of lifting machinery, checked at least once a month;
c) Wire rope inspection site, usually full-length tests, but mainly check the following parts:
* Fixed rope movement and the whole story ends.
* Through the pulley block or bypass pulley rope segment, the mechanical performance of repetitive tasks case, you should pay particular attention to mechanical pulley hanging out around any part of the period.
* Located balance rope pulley rope segment or easy to wear rope segments.
* Rope end portion (crimp rope end buckle rope ends,lift hoist wedge rope end fittings, rope clamp strong side, the pressure pull fixed rope end)
* For use pressed or forged steel rope clamp Si Shengsheng Folder To examine whether there are cracks and use of materials in the presence or absence of the wire rope and rope slip between folders.
2013年8月12日星期一
Electric hoist spills how to do?
Electric winch to hoist gear reducer drive, mainly used for hoisting, pulling unloading, pushing, dragging heavy loads. Such as various sized concrete, steel and mechanical equipment installation and removal, suitable for construction and installation company, mines, factories civil construction and installation works, but prolonged use will encounter oil spills and other failures occur, the following You encounter
manual hoist spills explain how to do?
Electric winch to work long hours in the case of oil spills often occur and overheating. Hoist spills, to observe the seal area, check the oil seal cracks, internal lip without cracking or flanging.Hoist equipment Also note that "three inspection": Check the oil seal and spindle joint surface has scratches and defects, there is a scratch with defect should be replaced. Check the oil return is smooth, so poor oil return crankcase pressure is too high oil seal leak or fall off, you must ensure that the minimum return pipe diameter, and does not distort, does not bend, oil return smoothly. Check the oil seal, box with the size, does not meet the criteria to be replaced.
In the daily operation of electric winch, winch prolonged overload due to the emergence of load chain operation overheating fault. There are two common heating parts: winch reducer outlet temperature is too high; running hot parts.
Electric winch to work long hours in the case of oil spills often occur and overheating. Hoist spills, to observe the seal area, check the oil seal cracks, internal lip without cracking or flanging.Hoist equipment Also note that "three inspection": Check the oil seal and spindle joint surface has scratches and defects, there is a scratch with defect should be replaced. Check the oil return is smooth, so poor oil return crankcase pressure is too high oil seal leak or fall off, you must ensure that the minimum return pipe diameter, and does not distort, does not bend, oil return smoothly. Check the oil seal, box with the size, does not meet the criteria to be replaced.
In the daily operation of electric winch, winch prolonged overload due to the emergence of load chain operation overheating fault. There are two common heating parts: winch reducer outlet temperature is too high; running hot parts.
2013年8月9日星期五
Climbing frame group hanging electric hoist commissioning procedures
Climbing frame group hanging electric hoist is attached to the wall by climbing frame lifting power wan buckle frame rack or ordinary steel fasteners and building climbing frame control cabinet composed of three parts, the popular saying is that you can be a dozen layers or whether dozens of buildings layer, as long as the erection of a wall scaffolding,Manual hoist coupled with climbing frame group hanging electric hoist as a hoist, electric control box for the operating center system, will be able to fully meet the cabinet structure, the following for you to explain the commissioning process.
1, group hanging electric hoist Before commissioning,load chain the construction unit shall organize, on behalf of the owners, supervision unit representatives, supplier representatives and owners of motor Ministry will participate in all pre-installation inspection and acceptance, in line with the design and specification requirements, commissioning work can be carried out.
2, the preparatory work before commissioning
A, electrical systems, safety interlocks, actuators, controllers, lighting and signal systems shall comply with safety requirements, the action should be sensitive and accurate.
B, fixed rope end and a hook and wound on the reel should be correct,hoist and trolley reliable, secure ropes compliance.
C, lubricate all lubrication points should be explained by oil were added.
D, all parts of the shell-proof bolts one by one check, you must tighten the sealing reliable.
E, when the line is energized, check the direction of the manipulation-proof control button should be explosion-proof electric hoist crane group movement in the same direction.
F, using the formal lifting limit switch limit switch position should be preceded by checking whether the lifting motor running in the same direction, or should change the wiring.
2013年8月7日星期三
Large tonnage two-speed electric hoist Features
Large tonnage two-speed electric
Wire rope hoist features require higher safety factor, and in the selection process has a significant requirement on the following details for you:
Pounds magnetic brake: latest design magnetic generator that produced the magnetic characteristics. Power cut off at the same time the brakes, brakes ensure crane is absolutely secure.
Housing: Aluminum alloy shell, solid and lightweight. Unique heat sink, heat quickly, can be used continuously, efficiency up to 40%. Overall airtight structure, can be used in chemical plants, electroplating factories and other places.
Limit switch: limit switch hanging under the hanging device, the automatic stop, prevent the load chain beyond, to ensure safety. Hook: by hot forging, excellent strength, not easy to break. Hook under 360 ° rotation, with safety tabs to ensure safe operation.
Chain: the super-heated steel imports FEC80 load chain In rain, sea water, chemicals and other harsh conditions using safe and secure.
Bracket: lifting steel support frame by a combination of two very strong.
Transformers: 24V/36V transformer devices. Operation, in case of leakage, prevent the accident, when it rains, can ensure safe use.
Reverse phase protection devices: special electrical wiring, power supply wiring error, the control circuit is inoperative.
Magnetic contactor: high efficiency electromagnetic contactor can be high frequency use, no problem. Button switch: Use waterproof button switch, light and durable.
Pounds magnetic brake: latest design magnetic generator that produced the magnetic characteristics. Power cut off at the same time the brakes, brakes ensure crane is absolutely secure.
Housing: Aluminum alloy shell, solid and lightweight. Unique heat sink, heat quickly, can be used continuously, efficiency up to 40%. Overall airtight structure, can be used in chemical plants, electroplating factories and other places.
Limit switch: limit switch hanging under the hanging device, the automatic stop, prevent the load chain beyond, to ensure safety. Hook: by hot forging, excellent strength, not easy to break. Hook under 360 ° rotation, with safety tabs to ensure safe operation.
Chain: the super-heated steel imports FEC80 load chain In rain, sea water, chemicals and other harsh conditions using safe and secure.
Bracket: lifting steel support frame by a combination of two very strong.
Transformers: 24V/36V transformer devices. Operation, in case of leakage, prevent the accident, when it rains, can ensure safe use.
Reverse phase protection devices: special electrical wiring, power supply wiring error, the control circuit is inoperative.
Magnetic contactor: high efficiency electromagnetic contactor can be high frequency use, no problem. Button switch: Use waterproof button switch, light and durable.
2013年8月2日星期五
Proof chain hoists scrapped conditions
No matter what the product has a certain life, proof
Chain Block is no exception, as proof hoist field of use and the environment particularity, it should be scrapped for each user to keep abreast of standards in order to avoid security risks, the following details for you Introduction:
1 explosion-proof manual hoist s hook:
①, section wear more than 10% of nominal size;
②, hoist hook cracks;
③, dangerous section or neck of the plastic deformation;
④, hook mouth size deformation increases more than 15% of the nominal size;
⑤, torsional deformation 超过 10 °.
2, the proof chain hoists load chain the following conditions must scrap:
①, chain wear ring diameter than the nominal size of 10%;
②, 11 links elongation of more than 3% from the single link from the elongation of more than 5%;
③, chain link cracks or other harmful defects hoists;
1 explosion-proof manual hoist s hook:
①, section wear more than 10% of nominal size;
②, hoist hook cracks;
③, dangerous section or neck of the plastic deformation;
④, hook mouth size deformation increases more than 15% of the nominal size;
⑤, torsional deformation 超过 10 °.
2, the proof chain hoists load chain the following conditions must scrap:
①, chain wear ring diameter than the nominal size of 10%;
②, 11 links elongation of more than 3% from the single link from the elongation of more than 5%;
③, chain link cracks or other harmful defects hoists;
2013年7月31日星期三
Mini electric hoist load chain lubrication
Chain hoist
load chain lubrication level is a key factor in life. So everyday to load chain lubrication timely and effective manner in order to ensure the effective life of the chain.
For multi-line mini electric chain hoist, the hook should ensure that the next frame will not be overturned. If you flip it back to its normal state, to ensure the chain of weld arranged in rows. Do not twist the rope hoist hanging load.
Connect the power cord must be cut off in advance. Meanwhile ground should be well grounded, otherwise the operator touches or chain hoist when any part, may feel a shock feeling.
Mini Wire rope hoist factory, is based on a user-specified voltage or high voltage equipment, such as 230/460V, need to check the wiring and make sure the power supply voltage requirements are met. If not, please refer to the manual must be corrected in order to meet the operating voltage requirements.
For multi-line mini electric chain hoist, the hook should ensure that the next frame will not be overturned. If you flip it back to its normal state, to ensure the chain of weld arranged in rows. Do not twist the rope hoist hanging load.
Connect the power cord must be cut off in advance. Meanwhile ground should be well grounded, otherwise the operator touches or chain hoist when any part, may feel a shock feeling.
Mini Wire rope hoist factory, is based on a user-specified voltage or high voltage equipment, such as 230/460V, need to check the wiring and make sure the power supply voltage requirements are met. If not, please refer to the manual must be corrected in order to meet the operating voltage requirements.
2013年7月29日星期一
Electric hoist chain replacement judge
Frequent use of Wire rope hoist lifting goods chain wear most frequently, so after work in the use of electric hoist hoist want to conduct a comprehensive inspection, especially the chain part, need to pay attention to daily maintenance, will not be guaranteed hoist life.
Explain the electric hoist load chain scrapped and replaced by:
1, chain and monocyclic permanent elongation shall not exceed 5% of the original length.
2, bend from the main ring plane, counting the main ring twisted more than 10 degrees should be scrapped.
3, the chain hoist must not exceed permissible wear value chain ring diameter of the bar or 10% of the thickness of assistive devices.
4, lifting any part of the chain of cracks, bends or distortions between the hinge and the ring stuck or stiff astringent entrapment phenomenon and can not be excluded prohibited.
How to choose an electric hoist lifting chain
Crane lifting chain is the most widely used one of
Hoist equipment electric chain hoists used in many industries, the chain hoist is directly related to the quality of life and safety, the following shows you how to use
wire rope hoist lifting chain For your reference:
One, first check the appearance of the chain:
1 inner / outer links are deformed, cracks, corrosion embroidered
2 pin is deformed or turn, embroidered eclipse
3 roller whether cracks, damage. Excessive wear
4 connector is loose deformation
5 there is no abnormal noise when running or abnormal vibration, hoist chain lubrication in good condition
Two, followed by a long load chain of measurement accuracy:
1 after cleaning before measurement chain
(2) will be measured on a chain around the two sprockets, chain up and down both sides of the test should be supported
3 before the measurement chain should be applied in one third of the minimum ultimate tensile load state visit 1min
4 measurements, impose requirements on the chain measuring load, so up and down both sides of the chain tensioner. Chain on sprocket teeth should ensure proper fit
5 Measuring two sprocket center distance
Three, the last measurement chain elongation:
1 for the removal of the entire chain of clearance, to exert some degree of chain pulling tension measured
(2) measurement, in order to minimize errors in the 6-10 section (link) where measurements
3 for measuring the number of roller sections between the inner dimensions L1 and L2 outward, in order to determine the size L = (L1 + L2) / 2
4 obtained hoist chain elongation length, this value chain elongation and front entry in contrast to the use of threshold values.
Chain elongation = judgment dimension - the reference length / reference length * 100%
Reference length = chain pitch * Session
One, first check the appearance of the chain:
1 inner / outer links are deformed, cracks, corrosion embroidered
2 pin is deformed or turn, embroidered eclipse
3 roller whether cracks, damage. Excessive wear
4 connector is loose deformation
5 there is no abnormal noise when running or abnormal vibration, hoist chain lubrication in good condition
Two, followed by a long load chain of measurement accuracy:
1 after cleaning before measurement chain
(2) will be measured on a chain around the two sprockets, chain up and down both sides of the test should be supported
3 before the measurement chain should be applied in one third of the minimum ultimate tensile load state visit 1min
4 measurements, impose requirements on the chain measuring load, so up and down both sides of the chain tensioner. Chain on sprocket teeth should ensure proper fit
5 Measuring two sprocket center distance
Three, the last measurement chain elongation:
1 for the removal of the entire chain of clearance, to exert some degree of chain pulling tension measured
(2) measurement, in order to minimize errors in the 6-10 section (link) where measurements
3 for measuring the number of roller sections between the inner dimensions L1 and L2 outward, in order to determine the size L = (L1 + L2) / 2
4 obtained hoist chain elongation length, this value chain elongation and front entry in contrast to the use of threshold values.
Chain elongation = judgment dimension - the reference length / reference length * 100%
Reference length = chain pitch * Session
2013年7月26日星期五
Ultra narrow dead length type Chain Block
Low-type
Chain Block , chain hoists and general greatly reduced compared to the length of its corners. The next hook chain hoists may have been up to the track below.
Limited due to the work environment or in the need to increase the lifting height of the structure, the section manual hoist s can be effectively utilized.
Chain hoist use is not very flexible, and to push heavy objects, hands clockwise pull load chain will ratchet friction plate, brake pressure into one common rotation axis will rotate sprocket teeth, so that the device spline hole lifting gear driven sprocket on lifting chain, smooth heavy lifting. But encountered dead general chain hoists are inevitable, and this is a drawback to use chain hoists,
Limited due to the work environment or in the need to increase the lifting height of the structure, the section manual hoist s can be effectively utilized.
Chain hoist use is not very flexible, and to push heavy objects, hands clockwise pull load chain will ratchet friction plate, brake pressure into one common rotation axis will rotate sprocket teeth, so that the device spline hole lifting gear driven sprocket on lifting chain, smooth heavy lifting. But encountered dead general chain hoists are inevitable, and this is a drawback to use chain hoists,
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