Elevator speed governor action velocity calibration instrument and method

Abstract

The invention discloses an elevator speed governor action velocity calibration instrument, which comprises a control host, a driver, a master speed detector and a slave speed detector, wherein the driver, the master speed detector and the slave speed detector are connected to the control host. The control host is provided with an electrical action detection line for connecting an electrical safety switch of an elevator speed governor. The driver is a contact-type rotation driver and the rotation speed thereof is controlled by the control host. The master speed detector and the slave speed detector are respectively a contact-type speed detector. Linear velocity of a pitch circle of the speed governor can be measured accurately without measuring the diameter of the pitch circle of the speed governor or calculating the diameter of the pitch circle of the speed governor by measuring the diameter of a rope slot of the speed governor and the diameter of a steel wire rope of the speed governor during field calibration test; and the linear velocity of the pitch circle of the speed governor is measured accurately at the moment of electrical action and mechanical action of the speed governor without being influenced by the shape of the rope slot of the speed governor, wear of the steel wire rope of the speed governor and wear of the rope slot of the speed governor.

Description

technical field [0001] The invention relates to an instrument and method for calibrating the action speed of an elevator speed limiter. Background technique [0002] The speed limiter of the elevator is a very important safety protection device for the elevator. When the elevator car runs at overspeed, the electrical safety switch on the speed limiter will act to cut off the power supply of the elevator and stop the elevator; when cutting off the power supply is not enough to stop the elevator, the mechanical action device of the speed limiter will Action, clamp the wire rope of the speed limiter, thereby driving the safety gear of the elevator car (or counterweight) to move, so that the elevator car (or counterweight) is locked on the guide rail, thereby preventing the elevator car (or counterweight) A further speeding accident occurred. At present, GB7588 "Safety Code for Elevator Manufacture and Installation" has made detailed regulations on the action speed range of va...

AI Technical Summary

Problems solved by technology

Therefore, the measured pitch circle speed of the speed limiter is also inaccurate.

[0005] Second: It is necessary to manually measure the diameter of the pitch circle of the speed limiter on site, and the operation is cumbersome and time-consuming

Since the rope is not a measured measuring instrument, and the width of the speed limiter rope groove is not the width of a rope, the measured result is not necessarily the circumference of the speed limiter rope groove on the one hand, and has no traceability on the other hand.

In addition, this method can only be used to detect speed governors of U-shaped rope grooves, and cannot detect speed governors of V-shaped rope grooves and U-shaped notch grooves, and the application range is narrow

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