Interpretation of technical requirements for fatigue test device for speed difference anti-dropping device

What is a speed difference fall arrester? Speed ​​differential fall arrester is also known as speed differential. The speed difference anti-dropping device is a rope (belt, wire rope) installed on the hanging point and equipped with a retractable length, which is connected between the lacing and the hanging point in series, and is prevented from falling due to the change of speed when the fall occurs. Products.

There is a concept here - when the fall occurs, when does the fall happen?

We need to define it by a physical test indicator, which is the minimum test load. So what is the minimum test load?

The fall arrester manufacturer hereby gives you the professional answer to this concept: The minimum test load, also called the minimum lock test quality, refers to the minimum load that enables the speed difference to start the lock function during the test, and must meet the requirements of GB 24544-2009. Provisions.

Technical requirements for the general function of the fall arrester fatigue test device: Physical motion simulation technical requirements: The test device shall be capable of self-locking reliability test of the speed difference fall arrester in a free fall mode according to the provisions of 6.8 of GB 24544-2009.

The test space provides technical requirements: the test device should have sufficient test space, which should facilitate the installation and test of different types of differential and test weight groups.

Operating requirements of the test device: The fall arrester fatigue test device should be easy to control, easy to operate, and easy to overhaul.

Check the general function of the fall arrester fatigue test device: Install the speed difference device on the test device as follows, and carry out the actual test operation:

a) operating the fatigue test device to raise the mobile platform (discussed below) to the upper limit of its working stroke;

b) Install the speed differential fall arrester on the lifting ring at the top of the rack; Mobile platform: The moving platform table top should be perpendicular to the vertical line hanging through the hanging speed differential.

Speed ​​difference anti-dropper finished product display

Continuous working performance test: The continuous working performance of the fatigue test device shall be tested according to the method specified in 6.8 of GB 24544-2009, and the self-locking reliability fatigue test of the speed difference fall arrester shall be carried out for 8 hours. The test method is as follows:

a) attach the weight of the minimum test load to the end of the safety rope of the differential fall arrester;

b) Pull the speed difference safety rope out 1m, and the horizontal distance of the test weight group from the hanging point does not exceed 300mm;

c) setting the moving speed of the mobile platform to raise the weight group at 200 mm/s, releasing the test weight group;

d) Repeat the operation of b) and c) for 8h. If the speed difference fall arrester fails during the test, replace the new speed differential and continue the test until the specified time.