1. For newly installed electric hoists or those installed after disassembly and inspection, they should first be tested with no load for several times. However, it is forbidden to test them with power on before the installation is completed.
2. Before normal use, a static load test should be carried out with a rated load of 125%, about 100 mm above the ground, for 10 minutes to check whether it is normal.
3. The dynamic load test is to test the rated load weight by repeated lifting and moving left and right. After the test, check whether the mechanical transmission part, electrical part and connection part are normal and reliable.
4. During use, it is absolutely forbidden to use it in an unallowed environment, and when the rated load and rated closing times per hour (120 times) are exceeded.
5. During installation, commissioning and maintenance, it is necessary to strictly check whether the limit device is flexible and reliable. When the hook is raised to the rising position, the distance from the hook shell to the drum shell must be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the hook is lowered to the lowering position, the wire rope safety circle on the drum should be guaranteed, and the effective safety circle must be more than 2 circles.
6. It is not allowed to press two flashlight buttons at the same time to make the electric hoist move in opposite directions.
7. After the work is completed, the main switch of the power supply must be pulled open to cut off the power supply.
8. The electric hoist should be operated by a dedicated person, and the operator should fully understand the safety operating procedures. It is strictly forbidden to pull or lift it crookedly.
9. During use, the electric hoist must be inspected regularly by a dedicated person, and timely measures must be taken when a fault is found, and it must be carefully recorded.
10. When adjusting the braking slippage of the electric hoist, it should be ensured that the braking slippage S≤V/100 under the rated load (V is the stable lifting distance under load within one minute).
11. Wire rope scrapping standard: The inspection and scrapping standards of wire ropes shall be implemented in accordance with CB/T5972-1986 “Practical Specifications for Inspection and Scrapping of Wire Ropes for Hoisting Machinery”.
12. The electric hoist must be kept with sufficient lubricating oil during use, and the lubricating oil must be kept clean and should not contain impurities and dirt.
13. When oiling the wire rope, a hard brush or a small piece of wood should be used. It is strictly forbidden to oil the working wire rope directly with your hands.
14. When the electric hoist is not working, it is not allowed to hang heavy objects in the air to prevent the parts from deforming.
15. During use, if a fault is found, the main power supply should be cut off immediately.
16. Pay special attention to the condition of vulnerable parts during use.
17. After a long period of continuous operation, the 10-20 ton hoist may automatically power off. This is the overheating protection function of the motor. At this time, it can be lowered. After a period of time, the motor can continue to work after cooling down.