Hydraulic prop capable of outputting constant force and repressing method

Abstract

The invention belongs to hydraulic control systems and relates to a hydraulic prop, in particular to a hydraulic prop capable of outputting a constant force and a repressing method. The hydraulic prop which is effective and reliable is provided for effective support and safe production of the coal industry and other mining industries. The hydraulic prop capable of outputting the constant force ischaracterized in that: the lower end of a spring pull-down sheet is connected with an integrated block; the integrated block is respectively sealed with an upper cylinder barrel and a lower cylinder barrel by an upper O ring and a lower O ring; the spring pull-down sheet and the integrated block are fixed by a fixing bolt; the integrated block is connected with a multi-purpose valve in a left-right horizontal direction; a filling valve and an alarm device are arranged on a front-back direction of the integrated block; a one-way valve is arranged at the lower end of the integrated block; the multi-purpose valve, the filling valve, the alarm device and the one-way valve are respectively arranged on the integrated block; and the lower end of the one-way valve is connected with a filter by a connecting pipe. By the invention, effects of effective support and safe production of the coal industry and the other mining industries are achieved.

Description

technical field [0001] The invention belongs to a hydraulic control system, relates to a hydraulic prop, and in particular provides an effective and reliable hydraulic prop with constant force output and a pressure supplement method for effective support and safe production of coal and other mining industries. Background technique [0002] The original hydraulic prop has a great potential safety hazard in support safety, because there is absolutely nothing that does not leak, and the leakage of the hydraulic prop varies according to the processing quality and sealing structure. The compressibility of the liquid is very small, and it is generally considered that the liquid is incompressible. When the hydraulic prop leaks, the pressure in the upper cylinder will quickly lose, thus losing the supporting force. [0003] When the hydraulic prop produces a positive displacement due to changes in the geological formation, the pressure in the upper cylinder of the hydraulic prop wil...

AI Technical Summary

Problems solved by technology

[0004] When the hydraulic prop loses its supporting force, that is to say, there is no external force on the hydraulic prop, the leakage of the hydraulic prop is reduced, and the hydraulic prop and the supported surface have a phenomenon of resting, which makes it difficult to find each hydraulic prop. The output force is different, the support effect becomes very poor, and it is easy to cause landslide or crush the hydraulic prop

Images