1. Newly installed or reassembled electric hoists should first undergo several empty-load tests. However, avoid power-up tests before they are fully assembled.
1. Electric Hoists newly installed or reassembled should first undergo several trial runs with the trolley. However, it is crucial not to power on for trial rotation before the installation is complete.
Prior to normal operation, a static load test should be conducted at 125% of the rated load, lifting off the ground by approximately 100mm, for a duration of 10 minutes, to verify proper functioning.
3. The load test is conducted by repeatedly lifting and lowering, as well as moving left and right at the rated load weight. After the test, the mechanical transmission, electrical, and connection parts are inspected to ensure they are normal and reliable.
4. Use is prohibited in unauthorized environments and under conditions exceeding the rated load and the rated number of operations per hour (120 times).
5. During installation, debugging, and maintenance, it is essential to rigorously inspect the flexibility and reliability of the limit device. When the hook reaches the upper limit position, the distance between the hook housing and the drum housing must be greater than 50mm (for 10t, 16t, and 20t, it must be greater than 120mm). When the hook descends to the lower limit position, ensure that the wire rope safety loop on the drum is secure, with an effective safety loop of more than 2 turns.
Do not press both buttons simultaneously that cause the electric hoist to move in opposite directions.
After completing the work, the main power switch must be turned off to disconnect the power supply.
8. Electric Hoists should be operated by a designated person who must fully understand and adhere to the safety operating procedures. Improper lifting or pulling is strictly prohibited.
9. Electric hoists must be inspected regularly by designated personnel, and any malfunctions must be addressed promptly with detailed records kept.
10. When adjusting the braking descent amount of an electric hoist, ensure that under the rated load, the braking descent amount S ≤ V/100 (where V is the stable lifting distance per minute under the load).
The wire rope retirement criteria: The inspection and retirement criteria for wire ropes are in accordance with the practical regulations for the inspection and retirement of wire ropes for lifting machinery as specified in CB/T5972-1986.
Ensure that overhead cranes are operated with sufficient lubrication, and maintain the cleanliness of the lubricant, free from impurities and dirt.
13. When oiling wire rope, use a stiff-bristled brush or a wooden sliver. It is strictly prohibited to oil the working wire rope directly by hand.
14. Do not suspend heavy objects in the air when the electric hoist is not in operation to prevent parts from deforming.
During use, if a malfunction is detected, the main power should be immediately disconnected.
16. Pay close attention to the condition of wear items during use.
17.10 to 20-ton葫芦 may experience automatic shutdown after prolonged continuous operation, which is a function of the motor's overheating protection. At this point, it can be lowered and after a period of time, the motor has cooled down, it can resume operation.
