Control method of elevator lifting safety protection system

Abstract

The invention discloses a control method of an elevator lifting safety protection system. The control method comprises program input and initial state control, speed judgment and balance guide control, brake control and forced brake control. The control method of the elevator lifting safety protection system prevents the defects of redundancy and easiness in fatigue damage in a traditional electric cable electrifying mode; the conventional braking is performed by adopting a magnetic control mode; the effective forced braking for a car and / or a counterweight is realized through a potential energy absorption mode of a brake drag jaw; in a power failure state, the brake drag jaw can push away a lock tongue of an electromagnetic control valve through an inclined surface structure under the elastic force effect of a powerful spring to turn out to prevent accidental falling of the car and / or the counterweight; and after the power failure condition is relieved, a brake drag jaw return mechanism can return the brake drag jaw to guarantee normal operation of an elevator so as to realize effective protection of elevator lifting.

Description

technical field [0001] The invention relates to a control method for a safety protection system, in particular to a control method for an elevator lifting safety protection system, belonging to the field of elevator safety protection. Background technique [0002] With the development of society, the use of elevators has become more and more common. It has been used only in commercial buildings and hotels, and has been used in office buildings, residential buildings and other places. Vertical elevators are the most common. Popularity has brought convenience to people's lives, but the accompanying elevator accidents have gradually increased, and people have begun to pay more and more attention to the safety protection measures of vertical elevators. [0003] Vertical elevators generally include four spaces and eight systems. The four spaces include machine room, shaft and pit, car and landing. The eight systems generally include traction system, guidance system, car system, a...

AI Technical Summary

Problems solved by technology

[0005]1. All safety protection devices need power support, and the existing elevators use power cables to supply power, which not only requires additional traction support for the elevator to go up and down The traction force and power consumption of the power cable are increased, and the power cable that moves with the car and runs through the elevator shaft is relatively long. Usually, the power cable is in a state of continuous bending during the movement of the car, so the power cable will be damaged due to frequent Bending causes fatigue damage to the outsourcing rubber, and there is a hidden danger of electrical failure

[0006]2. The speed limiter of the traditional overspeed protection device is usually installed on the ground of the elevator machine room or the sound insulation layer, and the tension wheel of the speed limiter rope is installed in the pit of the hoistway The speed governor rope is wound around the speed governor wheel and the tension wheel to form a fully closed loop, and its two ends are installed on the car frame through the rope head connecting frame to operate the lever system of the safety gear. The structure is not only complicated, but also easy During normal operation, the steel wire rope slips in the groove of the speed limiter sheave, the speed limiter rope is broken or excessively slack so that the tensioning device loses its function, etc.

[0007]3. Traditional safety protection devices generally only work when there is mains power. Once the elevator is powered off, the device usually does not work, such as the traditional broken rope The broken belt protection device is equipped with a broken rope and broken belt switch on the speed limiter steel wire rope, the transmission belt of the speed measuring generator and the steel belt of the layer selection and signal feedback device. Cut off the safety control loop to force the elevator to stop running, but the broken rope and broken belt switch usually cannot operate in the event of a sudden power failure

[0008]4. Traditional safety protection devices generally only protect the car system, but there are no relevant protective measures for the weight balance system. However, the damage of the weight balance system It will also directly lead to the failure of the car system

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