Elevator car emergency braking system

Abstract

The invention relates to an emergency braking system for an elevator car, which comprises: a car, the outer surface of the car is provided with a copper braking plate on the side wall and the bottom surface, and copper decelerating fins are provided at both ends of the side wall braking plate; The elevator shaft is provided with a plurality of magnetic plywood layers in the elevator shaft, and an air pit is arranged at the bottom of the elevator shaft, and magnet slats are arranged in the air bottom pit; a drive unit; a central control machine, which is arranged outside the elevator shaft and connected with The magnetic splints in each magnetic splint layer are connected to adjust the current intensity passing through the magnetic splints. The system of the present invention sets multiple layers of magnetic splints with electromagnetic splints and permanent magnetic splints in the elevator shaft, gradually reduces the falling speed of the car through Lenz's law, ensures the safety of people and objects in the car, and improves the safety of all elevators. At the same time, the central control machine can adjust the current input of the electromagnetic splint in real time according to the height of the car when it falls and the speed when it passes through each layer of magnetic splints, and flexibly adjust the magnetic field strength, so that the system can face more The case of diversity.

Description

technical field [0001] The invention relates to the technical field of elevator braking, in particular to an elevator car emergency braking system. Background technique [0002] Elevator is a kind of vertical elevator powered by electric motor, equipped with box-shaped gondola, which is used for multi-storey buildings to take people or carry goods. Elevators are used in multi-storey buildings and can be used to easily connect the upper and lower floors for the transportation of people and goods. The box used to carry people or loads is called a car. When the car is working, it is pulled by the steel cable and moves up and down the vertical shaft under the drive of the elevator. Once the car is pulled by the steel cable, the steel cable appears. If broken, the elevator will be in danger of falling, making the people or goods in the car in a dangerous state. Therefore, each elevator needs to be designed with a special anti-fall device when designing. The traditional anti-fall...

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Problems solved by technology

[0007] For this reason, the present invention provides an emergency braking system for an elevator car, which is used to overcome the problem in the prior art that the braking reaction force of a single braking is too high and the fixed magnetic field cannot be used for special situations. and item safety issues

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