Crane (gantry crane) Site Inspection Points
1、Foundation and track inspection
Check the foundation of gantry crane track for settlement, breakage and cracking. Check the track for cracks, serious wear and other defects.
Check the contact situation of the track and track foundation, and shall not be suspended between the foundation.
Check whether the joints of the track meet the requirements, generally 1-2MM, 4-6MM is appropriate for cold areas. Check the track transverse dislocation and height difference, the requirement is not more than 1MM. check the fixing situation of the track, the pressure plate and bolts should not be missing, the pressure plate and bolts should be tight and meet the requirements. Check the connection of the rail joint plate.
Check whether the longitudinal slope of the track meets the design requirements. The general requirement is 1‰. The whole length is not greater than 10MM. point me: engineering practical information book
The same section track height difference requirement is not greater than 10MM. check whether the gauge is super deviation, the requirement of the large car gauge deviation does not exceed ±15MM. or according to the parameters of the gantry crane instruction manual to determine.
2, the steel structure part of the inspection
Check the gantry crane outrigger flange connection bolt fastening. Check the combination of connecting plane of outrigger flange.
Check the outrigger connecting flange and outrigger pipe column weld.
Check whether the pin of the outrigger connecting tie rod is normal, whether the connecting bolts are tight, and the welding condition of the tie rod connecting ear plate and the outrigger. Point me: engineering practical information book
Check the tightness of the connecting bolts between the lower crossbeam of the outrigger and the outrigger and the connecting bolts between the lower crossbeams.
Check the welds on the lower crossbeam of the outriggers.
Check the tightness of the connecting bolts between the upper crossbeam of the outrigger and the outrigger and the main beam.
Check the welds on the upper crossbeam of the outrigger and the welded parts.
Check the connection condition of the main beam connection parts, including the fastening condition of the pin or connection bolt, the deformation condition of the connection joints, and the condition of the weld seam at the connection joints. Check the welding seam condition of each welding place of the main girder, mainly focusing on whether there is any tearing of the welding seam of the upper and lower chords and web of the main girder. Check whether there is deformation of the whole main girder and whether the deformation is within the specification.
Check whether there is a large height difference between the left and right main girders, and whether it is within the specification.
Check whether the cross link between the left and right main girders is connected normally, and check the welding seam of the cross link connecting ear plate.
3、Check on the running part of the big vehicle
Check the wear and cracking of travelling wheels, whether there is serious deformation, whether there is serious wear of wheel rim or no wheel rim and so on. Check whether the reducer lubricant is enough and the quality of lubricant.
Check the reducer case for cracking and oil leakage.
Check the fixing condition of the reducer.
Check whether the brake works normally.
Check the brake clearance of the brake, the wear of the brake pads, and the wear of the brake wheel. Check the connection of the coupling, the tightness of the connecting bolts and the wear of the elastic connecting parts. Check the tightness and protection of the motor.
4、Check the main lifting mechanism
Check the wear and cracking of the travelling wheel, whether there is serious deformation, whether there is serious wear of the wheel rim or no wheel rim.
Check the condition of the running track of the trolley, including track joints, wear and damage.
Check the condition of lubricating oil of the travelling part of the reducer. Check the braking condition of the travelling part.
Check the fixing condition of each part of the travelling part. Check the fixing of the rope end of the hoisting wire rope on the hoisting winch.
Check the lubrication of the hoisting winch gearbox, including the capacity and quality of the lubricant.
Check whether there is any oil leakage from the hoisting winch reducer and whether the reducer is damaged.
Check the fixing condition of the gearbox.
Check whether the brake of the hoisting winch is working normally. Check the brake clearance of the brake, the wear of the brake pads, and the wear of the brake wheel. Check the connection of the coupling, the tightness of the connecting bolts and the wear of the elastic connecting parts.
Check the tightness and protection of the motor. For hydraulic braking system, check whether the hydraulic pump station works normally, whether there is oil leakage and whether the braking pressure meets the requirements. Check the wear and protection of the pulleys.
Check the fixing condition of each part.
5、Check of sub-lifting mechanism
Check the connection between the electric hoist running track and the main beam and the wear and tear of the track Check the connection of the running track, including whether the connecting plate and connecting bolts are tight, and whether the track connecting seam meets the operation requirements.
Check the wear and tear of the travelling wheel of the electric hoist and whether the gap between the travelling wheel and the track web meets the safety requirements.
Check the winding of the hoisting wire rope on the electric hoist. Check whether the wire rope discharge device of the electric hoist works normally or is damaged.
Check the working condition of the brake of the electric hoist and the wear of the brake pads, whether the brake clearance and braking force meet the requirements.
Check the fixed condition of the wire rope end on the electric hoist.
Check the tightness of the connecting bolts of each connecting part.
6、 Inspection of hook and wire rope
Check the wear and tear of the hook. Check the configuration and damage of hook sealer. Check the operation of the hook sheave, wear and tear, and whether there is a device to prevent the wire rope from jumping.
Check the lubrication of moving parts. Check the use condition of the wire rope, whether there is checking the deformation situation, such as knotting, extrusion deformation, cut, broken strand, corrosion, high temperature blackening, rope diameter thinning and so on. Check the fixed condition of the rope end of the wire rope.
7, the inspection of subsidiary structure
Check the gantry crane up and down the stairs of the fixed situation. Check the fixed condition of each platform.
Check the fixed condition of staircase handrail and platform handrail.
Check the fixed condition of the operation room.
8、Check of safety devices
The inspection of the big car running safety devices, including travelling limit switch whether to install and work normally, whether to install travelling limit block and firm, electric or hydraulic iron boots whether to install and work normally, whether to install and work normally according to the requirements of the rail clamps.
Check whether the trolley running deviation correction device is installed and working normally. Check whether the windproof cable is installed. Check whether the ground anchor is installed correctly and works.
Check whether the buffer device for trolley operation is installed.
Check whether the sound and light alarm device for the operation of the trolley is installed and works properly.
Check whether the safety devices of the hoisting mechanism are fully equipped and work properly. Including trolley running limit device, limit block, lifting height limiter, lifting weight limiter.
Check whether the monitoring system is working normally. Check whether the anemometer works normally.
9、Check of electrical parts
Check whether the cable of each part is damaged, hanging objects, support connection is not secure and so on.
Check whether the protective cover of each motor is complete and intact. Check whether the appearance of each motor is intact, the junction box and cover should be intact, whether the wire terminals are tight, there is no wire damage and breakage.
Check whether each limit switch is complete and intact.
Check whether the lighting is intact.
Check the protection of the control cabinet.
Check the components and electric lines in the control cabinet.
Check the electrical components in the operation room are intact.
Check whether the main cable cable reel is working normally.
Check whether the cable slide of the overhead crane is normal, and whether the cable moves normally on the slide when the crane is running. Check whether the cable slide of the electric hoist is working normally, and whether the cable moves normally on the slide when the electric hoist is running.
Check the cable connector of the brake and the cable good or bad condition.
10、Site use condition check
Check whether there are obstacles near the gantry crane track that affect the operation of the gantry crane. Check whether there are scattered objects on each platform and truss. Check the gantry crane up and down, left and right whether there are obstacles affecting the operation of the gantry crane.
