Speed-limiting anti-falling device used for lift modification

Abstract

The invention provides a speed-limiting anti-falling device used for lift modification and belongs to the technical field of lifting machinery. The problem that simple lifts are inconvenient to modify is solved. According to the speed-limiting anti-falling device used for lift modification, a lift comprises a lift car, guide rails, a lifting hook and two anti-falling devices. The anti-falling devices are fixedly connected to the lift car. The speed-limiting anti-falling modification device comprises a speed limiter, a tensioning wheel and a mechanical connecting device. The mechanical connecting device is fixedly connected to the lift car and connected with the anti-falling devices. The speed limiter is arranged above the lift car. The tensioning wheel is suspended on the speed limiter through a steel wire rope in a closed loop mode and located under the lift car. A rope end part of the steel wire rope is fixedly connected to the mechanical connecting device. By additionally arranging the speed limiter, the tensioning wheel and the mechanical connecting device, the rope end part of the steel wire rope which is connected between the speed limiter and the tensioning wheel in the closed loop mode is fixedly connected with the lift car, and if the lift car overspeeds, the speed limiter acts immediately to stop the lift car on the guide rails.

Description

technical field [0001] The invention belongs to the technical field of hoisting machinery, and relates to an elevator, in particular to a speed-limiting and anti-falling device used for the transformation of an elevator. Background technique [0002] A simple lift refers to a rigid guide that uses an electric hoist, traction machine, winch, and hydraulic pump station as the driving device, drives the load-carrying device through a wire rope, chain, hydraulic cylinder, etc. There are two main types of downward fall prevention devices for simple lifts currently in use: 1. ordinary fall arrester; 2. speed limiter safety gear. [0003] Item 27.2 of the TSG Q7015-2016 Periodic Inspection Rules for Hoisting Machinery promulgated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on March 23, 2016 stipulates that in addition to the direct acting hydraulic simple lift, it is necessary to check whether other forms of simp...

AI Technical Summary

Problems solved by technology

[0008] 1. At present, most of the simple elevators in use are only composed of a pair of ordinary fall arresters, which only meet the first requirement of Item 27.2 of the new inspection regulations, and do not meet the requirements of Items 2 and 3. They cannot continue to be used and need to be modified.

[0009] 2. It is necessary to install a safety gear under the elevator car and remove the safety gear to replace the ordinary safety gear with the speed limiter through transformation, and the existing old standard elevator may not meet the civil construction and the depth of the pit is not enough, that is In reality, many pits cannot be dug down

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