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Electric hoist maintenance and safety precautions

1. Newly installed or overhauled after the installation of electric hoist, the first test run should be empty several times. But not installed before the test should not transfer power.

2. In normal use, should be carried out prior to 125% of rated load, lifting off the ground about 100 mm, 10-minute static load test and check whether it is normal.

3. Dynamic test is based on rated load weight, lift and move around for repeated testing, test check the mechanical transmission parts, electrical parts and connecting parts are normal and reliable.

4. In use, the absolute prohibition of the environment is not allowed, and more than rated load and nominal closing hour number (120) of cases.

5. Installation and maintenance, must strictly limit device is flexible and reliable inspection, when the hook to the upper limit position, the hook from the shell to the shell of the roll must be greater than 50mm (10t, 16t, 20t must be greater than 120mm .) When the hook down to the lower limit position, should ensure the safety rope on the drum circle, circle to be effective and safe in 2 turns or more.

6. Not allowed to hoist the same time pressing the two opposite direction of the flashlight by the door button.

7. After the work is the total gate to be opened to the power, cut off the power.

8. Electric hoist by hand manipulation, manipulator should take full advantage of safe operation, and non-pull ramp hanging crooked.

9. In the use of specialized personnel must inspect hoist regularly, found that failure to take timely measures, and carefully recorded.

10. Adjust the amount of electric hoist brake down, they should ensure that the rated load, braking down the amount of S ≤ V/100 (V is the stability of the load within the next minute the distance l).

11. Rope retirement criteria:
Wire rope inspection and retirement criteria by CB/T5972-1986 "crane wire rope inspection and retirement of practice" implementation.

12. Electric hoist in use to maintain sufficient oil and keep oil clean and should not contain impurities and dirt.

13. Rope oil should be used when a hard brush or small piece of wood is prohibited by hand to direct the work of the rope is oil.

14. Electric hoist does not work, does not allow the air hanging heavy objects to prevent permanent deformation parts.

15. In the course, if we find fault, they should immediately cut off the main power supply.

16. The use of wearing parts should pay particular attention to the situation.

17.10 ~ 20 tons of hyacinth in a long time continuous operation, it may appear the phenomenon of auto power off, this is the motor overheat protection, time can be decreased over time until the motor cooled down to continue working.

18. Use and management according to JB9009-1999 "Electric wire rope hoist safety regulations" in the implementation of article 4.

19. Inspection and maintenance according to JB9009-1999 "Electric wire rope hoist safety regulations" in Article 5 implementation.


Safety Precautions

In understanding the basis of instructions, but please note the following:

* Please use the instructions and memorize the contents of the nameplate after the operation.

* Please, the lower limit of the stop block and then lifting objects adjustments.

* Please confirm before using the reliability of the brake situation.

* If it is found before using the following abnormal conditions rope, never action.

* Bending, deformation, corrosion and so on.

* Exceeds the requirements of wire rope breaking levels, wear volume.

Install before use with a 500V megger check the motor and control box of the insulation resistance, cold resistance at room temperature should be greater than 5MΩ, before use.

Please DO NOT exceed the rated load lifting objects, rated load from the hook in the nameplate has been marked.

* Lifting the ban by one thing, the other as absolutely not to hoist the elevator hoisting mechanism used to carry persons.

* Lifting the object was not following.

* Lifting the object, the hook can not be lifting in the swing state.

Connect the hoist to move to the top and then lifting the object is not inclined hanging.

* Limit as a limit switch does not allow repeated use.

Do not lifting objects connected with the ground.

Do not over-jog operation.Do not pull by hand switches line before the other objects.

The repair must be cut off the power before the test.

* Maintenance and inspection work must be carried out under no-load state.

* Make sure to install the wedge is a solid and reliable.