Crane Maintenance

electric hoist manufacturers 1), the appearance of the bridge crane: a comprehensive clean appearance, so that no dust, no yellow robe. Check for cracks, open welding.
2), carts, trolley: ① Check and tighten the drive shaft housing, gearbox, coupling and shaft, the key is loose; ② Check and adjust brake wheel clearance to make it uniform, sensitive and reliable.
3) Check the overhead crane reducer mainly to see if the oil spill. Cabinets abnormal sound operation, it is necessary to open the lid to check. Usually bearing damage or gear backlash is too large, severe tooth wear and other reasons.
4), lifting winch: ① Check the wire rope, hook, pulley is safe and reliable, wear exceeds the specified value should be replaced. ② Check and adjust the brakes, make it safe, sensitive and reliable.
5), overhead crane wire rope inspection. Inspection should focus on observation broken wire rope wear, kinks, rust, etc., for some wear, broken wires more serious position but not excessive, do the mark to focus on tracking the retest. Pay attention to check the safety rope in the roll stopper is valid, whether the rope reel clamping plate and plate number is appropriate.
6) Lubrication: Check all parts of the oil, fuel, as required to join or replace oil.jib crane manufacturers

7) Check for overhead crane pulley. Focus on the bottom is excessive wear of cast iron pulleys and whether there are cracks. For the balance wheel pulley block overlooking Young organization, because usually the case it does not move, it is easily overlooked. So, be sure to check before installing the flexibility of its rotation, otherwise, the installation of wire rope around Jan overlooking length and tension can not be used to automatically adjust the balance wheel, so that an increase in altitude adjustment rope Young overlooking the difficulty and risk level jobs.
8) Electrical: ① check the limit switch is sensitive and reliable; ③ check the electrical box is sensitive and reliable operation of all electrical appliances; ③ Check the motor, bells, lead is safe and reliable; ④ check signal is good.
9) Check for loose coupling each bridge crane or even "scroll keys." Focus on checking the flexible pin coupling elastic rubber ring without abnormal wear of tooth couplings to pay special attention to the ring gear wear. Due to installation accuracy, between the two axes at a greater offset, the performance of the entire ring in a short time will soon be bald. If such a situation, prone to serious accidents in the lifting mechanism.

Crane inspection items

electromagnetic overhead craneOverhead crane safety inspection in order to ensure safe operation of the overhead crane, crane operation required during some routine security check on the project and highlights are as follows:
(1) lifting height limiter, travel limit switch and all the positive properties of interlocking institutions
(2) comply with the safety requirements of the major components: the opening is increased less than 15% of the original size, the torsional deformation of less than 10%; hook bushing wear plate is less than 50% of the original size, the mandrel plate hook wear less than 5%, no peeling burr, welding. Hanger hook and pulley no obvious defects. The surface of the wire rope wear, corrosion is less than 40% of the diameter of the wire, broken wires in one lay length within less than 10% of the total number of wires, no breaks, no thinning, no core prolapse, dead twisting, compressional deformation annealing, burning phenomenon.electric hoist manufacturers

End connections and fixed rope clips, clips, wedge block connection intact, no loose plate at least two, the number of no less than three catches. Roll no cracks, connections, fixed no loose; cylinder wall wear less than 20% of the original wall thickness; secure volume of not less than two laps, reel and rope diameter ratio of compliance. Balance wheel fixed intact, shall comply with the requirements of the rope. Brakes no cracks, no loose, no serious wear, brake clearance on both sides equal right size, there is sufficient braking force, brake wear with less than 50% of the original thickness.
By conventional overhead crane safety inspection, to prevent accidents, reduce equipment accidents, improve equipment operation rate and reduce maintenance costs etc play a significant role.