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.