3.
If the cage falls faster than the action speed of the speed limiter, it will be about 30 meters off the ground 3m If the speed governor at the place still fails to stop the cage, immediately release the falling button to brake the motor brake to prevent the cage from being damaged at the bottom.
Above: place 40 bags of mortar evenly in the cage, and pay attention to uniform layout.
The steps of elevator drop test are as follows: 1.
The speed governor shall be reset after falling test and every action of the speed governor during normal operation.
The driving cage rises to about 10m When the height is, release the button and the cage stops.
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Check the reason why the speed governor does not act and eliminate the fault.
5.
There are many reasons for the accidents, which can be roughly divided into: 1.
With the development of society and scientific progress, the safety factor of the equipment has been greatly improved, Moreover, enterprises now require the service life of elevators to be “within three years for construction elevators and within five years for tower cranes”.
After the normal operation of the elevator, this test shall be carried out every three months to ensure the safe operation of the elevator.
The most important thing is to mark the control line and wrap the red tape.
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As long as the management is in place at ordinary times, there will be no accidents); 2.
7.
Press the rise button on the drop test button box.
Before the new or reinstalled elevator is put into use, in addition to the technical test, a falling test with rated load shall be carried out.
The governor must be proved to be reliable and effective before it can be put into use.
Human reasons: including maintenance personnel, operators and non operators (solutions: strengthen safety education and training, and make operators familiar with the function and working principle of each equipment element of the equipment practically); 3.
Restore it to normal.
Before the test, the mechanical equipment manager shall check the whole equipment and ensure that the brake of the motor works normally.
Every year, many construction elevator falling accidents injure people.
8.
When the speed governor acts, the normal sliding distance of the cage shall be within 0.3—1.2m between.
Press the falling button on the button box.
Such equipment is much higher than the requirements of industry standards.
6.
At this time, there is no electricity in the motor stator, the brake is powered on, the brake is released, and the falling of the cage is accelerated until the speed can make the governor act, and the cage is braked.
9.
Connect the cable of the test button box to the ground station through appropriate ways.
2.
Cut off the power supply and insert the cable of the drop test button box into the special socket for drop test at the bottom of the electrical control box on the cage（ During the first test, check whether the electrical schematic diagram and physical wiring number are correct.) 4.
Management reasons (equipment installation and disassembly process management is the most important).
The most important thing in the figure above is: fix the control line on the single door of the ladder cage to prevent the control line from swinging back and forth, which is very important to measure the falling distance.
Pressurize the iron in the cage (or 50KG Bagged cement) to the rated load and evenly distributed.
The reasons of the equipment itself (solutions) strengthen equipment management, conduct regular maintenance and eliminate hidden dangers of the equipment.
Make sure that the cable will not get stuck during the fall test.
Evacuate all personnel in the cage, close the cage door and fence door, and turn on the power switch.
Then operate the lifting cage to slowly lower to the ground to prevent the test button box.
If necessary, send the speed governor to the manufacturer for calibration and repair, and then conduct the falling test.
