Braking device and method for preventing elevator from accidentally moving

Abstract

The invention discloses a braking device and method for preventing an elevator from accidentally moving. The elevator comprises a rope sheave, a steel wire rope surrounding the rope sheave and an elevator rack fixing the rope sheave. The braking device further comprises a braking frame capable of deflecting relative to the rope sheave and conducting corresponding braking on the rope sheave and the steel wire rope. The braking frame at least comprises a locking mechanism fixed with or separated from the rope sheave, and a friction piece matched with the steel wire rope. The braking device is high in universality, a gap between the friction piece and the steel wire rope can be adjusted, even the diameters of the steel wire rope are different, the improvement of an old elevator is facilitated, punching is not needed, a shaft is used for positioning, accordingly, the braking device is more accurate and more reliable, and installing is convenient and safe; and safety failures are avoided, and serious accidents of casualties are reduced.

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, residents are also eager to get convenient vertical transportation in their houses when they can enjoy good land public transportation services. Therefore, in recent years, the number of elevators has increased rapidly, and the number of elevators in the country has increased from 285,000 units in 2003 to 3,093,000 units in 2013. As a special means of transportation, the elevator is an indispensable means of transportation for the common people. It brings unprecedented convenience to the people’s daily life. The safety and reliability of its operation are common concerns of many people. The quality of residential elevators is good. In 2014, the General Administration of Quality Supervision, Inspection and Quarantine of the People’s Re...

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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