Braking device and method capable of preventing elevator from accidental movement

Abstract

The invention discloses a braking device and method capable of preventing an elevator from accidental movement. The braking device comprises an elevator wheel, a pair of friction blocks in friction contact with two sides of the elevator wheel or a steel wire rope, and a telescopic mechanism connected with the friction blocks and capable of lengthening or shortening the space between the two friction blocks; each of the friction blocks has a self-locking oblique angle. According to the invention, the independent emergency braking device is arranged to prevent the steel wire rope from sliding on a rope wheel due to insufficient traction force, and the telescopic mechanism is adopted to drive the friction blocks to rub the steel wire rope so as to avoid safety failure and reduce a serious accident of casualties.

Description

technical field [0001] The invention relates to a braking device and method for preventing accidental movement of an elevator. Background technique [0002] With the development of urban construction and the improvement of people's quality of life, when residents can enjoy good land public transportation services when traveling, they also desire to obtain convenient vertical transportation in their residences. Therefore, in recent years, the number of elevators has grown rapidly, and the number of elevators in the country has increased from 285,000 in 2003 to 3,009,300 in 2013. As a special means of transportation, the elevator is an indispensable means of transportation for ordinary people. It brings unprecedented convenience to people's daily life. The safety and reliability of its operation are issues that many people are generally concerned about. The quality of residential elevators is good. It directly affects the quality of life of ordinary people. In 2014, the Gener...

AI Technical Summary

Problems solved by technology

[0003] 1. When the elevator stops at the floor, after the hall door and the car door are opened, passengers and goods enter and exit the car. At this time, it cannot be ruled out that the overload and vibration cause insufficient braking force of the working brake, and there is oil on the braking surface, and the mechanical parts of the brake fail. Such as brake pad wear, energy storage compression spring aging and plastic deformation, etc.;

[0004] 2. Although the brake has sufficient braking force, there will still be overload and vibration, which will cause the steel wire rope to slip on the traction wheel due to insufficient traction (there is oil on the contact surface between the steel wire rope and the traction wheel, and the steel wire rope will become thinner after long-term use. The contact surface with the traction wheel groove is reduced, the working surface of the traction wheel is worn, the replacement of unqualified traction wheels, etc.); and once the braking force or traction force is insufficient, it will cause serious accidents of casualties;

[0005] 3. The control unit of the frequency converter is faulty, and the wrong command is issued, causing an accident of opening the door and walking the ladder

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