Safety protection arrangement method for accidental movement of elevator car

Abstract

The invention relates to the technical field of elevator safety, in particular to a safety protection arrangement method for accidental movement of an elevator car. The method includes the following steps that a second lifting and pulling device is arranged on the side, located on the elevator car and opposite to a guiding mechanism, in a shaftway; and the second lifting and pulling device is provided with a speed limiter; an elevator traction counter-weight mechanism is provided with an elevator car accidental movement protecting device which is connected with and performs transmission with the speed limiter, the speed limiter detects the movement stroke of the elevator car, when the movement stroke of the elevator car is larger than the detection range of the speed limiter, the speed limiter drives the elevator car accidental movement protecting device to stop work of the elevator traction counter-weight mechanism, and the elevator car is made to be braked and stopped. According to the method, when an old elevator is refitted, it is prevented that the elevator car is out of control, falls and collapse to the bottom and rises and soars; it is prevented that the elevator car leaves a floor in the state that a door is not closed; it is prevented that the elevator car accidentally moves when a traction steel thin rope slides on a traction wheel; it is prevented that the elevator car fast runs in the state that a door lock is in short-circuit connection and does not reset; elevator car accidental movement is accurately judged; and no mistaken operation happens in the states of emergency braking and power failure.

Description

technical field [0001] The invention relates to the technical field of elevator safety, in particular to a safety protection arrangement method for accidental movement of a car. Background technique [0002] In today's elevator market, in an era where customers require safety and comfort in parallel, it is the social responsibility of elevator manufacturers to ensure the safe, comfortable and stable operation of elevators. At present, the main working principle of all elevator detection systems to prevent accidental movement of the car is to detect elevators by a separate detection system. The car triggers the braking system to brake or periodically self-monitors the braking force after the door is not closed and moves in the door-opening area. [0003] According to the definition in the national standard, unintended car movement "in the unlocked area and in the open state, the car leaves the landing without an instruction, and does not include the movement caused by loading...

AI Technical Summary

Problems solved by technology

Newly installed elevators generally have matching detection and lifting devices, but this is not the case for old elevators. figure 1 As shown, it generally includes a car 1, and the car is connected with a traction counterweight mechanism 2 and a guide mechanism 3 located on one side of the car. Due to the long installation period, there are hidden dangers in the safety structure, and the old elevator With a huge amount of stock, how to make old elevators have new installation protection measures and improve their safety is a long-term technical problem that cannot be solved in the industry

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