A method for testing the performance of a construction elevator anti-fall safety device

Abstract

The invention discloses a detection method for the performance of a construction elevator anti-fall safety device, which includes controlling the car to rise and reach a steady speed, recording the torque of the driving motor during the steady speed period; controlling the driving motor to switch to the torque control mode without outputting any Torque; when the car falls, turn on the anti-fall safety device, record the closed-loop vector feedback speed value of the controller at this time or the speed estimation value under open-loop vector control and start timing; stop timing when the car speed is zero. The invention can be detected at the construction site without loading the car of the construction elevator and without additional detection tools, and can detect the braking action speed, braking torque and equivalent full-load braking distance of the anti-fall safety device.

Description

technical field [0001] The invention relates to the technical field of safety detection, and more specifically relates to a detection method for the performance of a construction elevator anti-fall safety device. Background technique [0002] In the field of building construction, construction hoists are widely used. The anti-fall safety device equipped with the construction hoist is an important safety equipment that can provide emergency braking when the construction hoist accidentally falls. Since the anti-fall safety device does not work when the construction hoist is in normal use, it only works when an accident occurs, so it is particularly important to regularly detect its key performance indicators, such as action speed, braking torque and braking distance. . [0003] At present, there are two detection methods for the anti-fall safety device of construction elevators. One is to dismantle it regularly and send it to a special organization for testing using a specia...

AI Technical Summary

Problems solved by technology

The first one is mandatory by the national standard, and the test result is accurate, but due to the trouble of the test, the time interval between the two tests must be long, and it cannot reflect the performance index of the anti-fall safety device in time; although the second one is also the national standard It is required, but on the one hand, when the anti-fall test is carried out on site, the elevator car needs to be fully loaded and unmanned. This kind of loading method is not available in every construction site. The detection of speed and braking distance requires additional detection tools. The more common situation is that when no additional detection tools are equipped, the performance indicators are completely estimated manually. As for the indicators of braking torque, they cannot be obtained on site. The accuracy of the performance indicators has been greatly reduced, which cannot reflect the real situation of the anti-fall safety device

The insufficiency of the above two anti-fall safety device detection methods has also led to a large number of anti-fall safety devices on the construction site being in a state of sick operation

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