A device for preventing abnormal movement of elevator car

Abstract

A device preventing abnormal movement of a lift cage, comprising a brake mechanism (1) installed on a crossbeam, a reset mechanism (2) provided on an end of the brake mechanism (1), and an electrical testing mechanism (3); the brake mechanism (1) comprises a casing (4); a U-shaped action jaw (5) is provided on one side of the casing (4); a T-shaped guide rail (10) is located in the U-shaped action jaw (5); an electromagnet (6) and a brake pad (7) are symmetrically disposed on both sides of the U-shaped action jaw (5); the brake pad (7) is installed on an end of the electromagnet (6), and extends out and retracts under the control of the electromagnet (6) to clamp and release the T-shaped guide rail (10); the electrical testing mechanism (3) comprises a magnetic strip (8) installed on the T-shaped guide rail (10) and a magnetic strip sensor (9) opposite to the magnetic strip (8); the magnetic strip sensor (9) is installed on the side of the casing (4) provided with the U-shaped action jaw (5). The device preventing abnormal movement of a lift cage employs a mechatronics design, and has the advantages of automatic testing, automatic identification, fast response and a short braking distance.

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

Images