Hydraulic buffer type elevator tensioning device and tensioning method

Abstract

The invention discloses a hydraulic buffering type elevator tensioning device and a tensioning method that are applicable to marine elevators or elevators on the working condition that the conventional tensioning device bounces after receiving a high impact load and being affected by external factors. The hydraulic buffering type elevator tensioning device comprises a tensioning component, a hydraulic buffering component and a fixing component. When the hydraulic buffering type elevator tensioning device receives an upward impact load, a plunger retracts, a cylinder body moves upwards, oil pressure of a plunger inner cavity rises, the impact load is inhibited, a buffer spring is further compressed, the hydraulic buffering type elevator tensioning device is inhibited from moving upwards, and pressure oil and the buffer spring store impact energy at the same time, thereby reaching a buffering effect of the hydraulic buffering type elevator tensioning device. The hydraulic buffering type elevator tensioning device can effectively prevent a tensioning wheel from bouncing after receiving the impact load or being affected by the external factors; steel wire rope elongation of a speed-limiting steel wire rope caused by thermal expansion and cold contraction or long-time use, and changes of a tensioning force of the speed-limiting steel wire rope can be detected in real time, a speed limiter and safety tongs linkage failure caused by the insufficient tensioning force of the speed-limiting steel wire rope can be avoided; and the hydraulic buffering type elevator tensioning device is compact in system structure, small in space occupation, wide in application range, and convenient to mount and use.

Description

technical field [0001] The invention relates to a hydraulic buffer type elevator tensioning device and a tensioning method, which are especially suitable for marine elevators or elevators under the condition that the impact load of the tensioning device is large and the vibration of the tensioning device is disturbed by external factors. Background technique [0002] Elevator speed-limiting system is an important component of elevator safety components. The existing speed-limiting system is mainly composed of speed-limiting device, speed-limiting rope, safety gear and tensioning device. With the development of elevator technology, more and more elevators are used in production and life in various working conditions. [0003] Most of the existing tensioning devices use counterweight to tighten the speed-limiting steel wire rope. However, when the impact load of the marine elevator or the tensioning device is large and the working conditions are interfered by external factors,...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing tensioning devices use counterweight to tighten the speed-limiting steel wire rope. However, when the impact load of the marine elevator or the tensioning device is large and the working conditions are interfered by external factors, the tensioning device is prone to beating, causing the limit The tension force of the speed wire rope is insufficient, and even the speed-limiting wire rope is separated from the rope groove of the tensioner

When the elevator overspeed requires the action of the safety gear, the linkage between the speed limiter and the safety gear fails due to insufficient tension, causing danger

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