Precautions for using wire rope electric hoist
There are several operating speeds of wire rope electric hoist, including double speed and single speed. The wire rope electric hoist has different matters that need our attention at different speeds:
1. The model of double speed wire rope electric hoist newly installed or installed after disassembly and inspection is MD1, and the empty vehicle test run shall be carried out for several times. However, before the installation is completed, do not power on and test run.
2. Before normal use of the two speed wire rope electric hoist, a 10 minute static load test shall be carried out at 125% of the rated load and about 100 mm from the ground to check whether it is normal.
3. Dynamic load test is to conduct repeated lifting and left-right movement test based on the rated load weight. After the test, check whether the mechanical transmission part, electrical part and connecting part are normal and reliable.
4. When the two speed electric hoist is in use, * * it is forbidden to use it in an impermissible environment and when it exceeds the rated load and the rated closing times per hour (120 times).
When the lifting hook and the shell are installed flexibly, it must be checked whether the lifting hook is greater than the limit of 120t. When the lifting hook is installed reliably, it must be greater than the limit of 120t. When the hook drops to the lower limit position, the safety ring of steel wire rope on the drum shall be ensured, and the effective safety ring must be more than 2 turns.
6. It is not allowed to press two manual switch buttons at the same time to make the electric hoist move in the opposite direction.
7. After the work is completed, the main gate of the power supply must be opened and the power supply must be cut off.
8. The two speed electric hoist shall be operated by a specially assigned person, and the operator shall fully master the safety operation procedures. It is strictly prohibited to pull and hoist askew.
9. During use, special personnel must regularly check the electric hoist, take timely measures in case of faults, and carefully record them.
10. When adjusting the braking sliding amount of two speed steel wire rope electric hoist, it shall ensure that the braking sliding amount s ≤ V / 100 under rated load (V is the stable lifting distance within one minute under load).
11. Scrapping standard of steel wire rope of two speed electric hoist: the inspection and scrapping standard of steel wire rope shall be in accordance with CB / t5972-1986 practical code for inspection and scrapping of steel wire rope for crane machinery.
12. The two speed electric hoist must keep enough lubricating oil in use and keep the lubricating oil clean without impurities and dirt.
13. When oiling the steel wire rope, a hard brush or small wooden piece shall be used. It is strictly prohibited to oil the working steel wire rope directly by hand.
14. When the two speed electric hoist is not working, it is not allowed to hang the heavy objects in the air to prevent permanent deformation of parts.
15. Special attention shall be paid to the wearing parts during use. If any fault is found during use, the main power supply shall be cut off immediately.