Device for preventing elevator cage from abnormally moving

Abstract

The invention discloses a device for preventing an elevator cage from abnormally moving. The device comprises a braking mechanism installed on a cage large beam, a reset mechanism arranged at one end of the braking mechanism, and an electrical detecting mechanism. The braking mechanism comprises a shell. A U-shaped action jaw is arranged on one lateral side of the shell. An elevator T-shaped guide rail is located in the U-shaped action jaw. Electromagnets and brake pads are symmetrically arranged on the two sides of the U-shaped action jaw. The brake pads are installed at the ends of the electromagnets and are stretched out and drawn back under the control of the electromagnets so as to clamp and release the elevator T-shaped guide rail. The electrical detecting mechanism comprises a magnetic strip installed on the elevator T-shaped guide rail and a magnetic strip sensor opposite to the magnetic strip. The magnetic strip sensor is installed on the side, with the U-shaped action jaw, of the shell. By the adoption of the mechanical and electrical integration design, the device has the advantages of being capable of conducting detection and recognition automatically, high in response speed and short in braking length.

Description

technical field [0001] The invention relates to an elevator car accessory, in particular to a device for preventing abnormal movement of the elevator car. Background technique [0002] At present, China has become the country with the largest number of elevators in the world. There are 2.4 million elevators in operation every day, and there is one elevator for every five hundred people on average, and it is growing at a rate of 15% every year. The increase in the number of elevators has increased the workload of maintenance. Many elevators have increased safety accidents due to insufficient maintenance work or aging of elevator equipment. Among them, safety accidents caused by the movement of the car when the door is opened frequently occur , when the elevator door is open, there are two ways to prevent the elevator from moving in traditional elevators. One is the main engine brake, but this device acts on the position of the main engine, which cannot prevent the steel wire ...

AI Technical Summary

Problems solved by technology

The increase in the number of elevators has increased the workload of maintenance. Many elevators have increased safety accidents due to insufficient maintenance work or aging of elevator equipment. Among them, safety accidents caused by the movement of the car when the door is opened frequently occur , when the elevator door is open, there are two ways to prevent the elevator from moving in traditional elevators. One is the main engine brake, but this device acts on the position of the main engine, which cannot prevent the steel wire rope from slipping on the traction sheave or the car caused by the failure of the brake itself. The second is the safety gear of the car. Since the safety gear of the car is mostly progressive and must be triggered by the speed limiter when the rated speed exceeds the rated speed, the braking distance is too large, far beyond the door area. The security allowable range

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