Integrally-inserted conical sealing reversal valve

Abstract

The invention provides an integrally-inserted conical sealing reversal valve which comprises a valve body and a control mechanism, wherein the valve body is internally provided with a front row of working cavities and a rear row of working cavities, the flat surface of the valve body is provided with a liquid inlet and a liquid return port which are communicated with the working cavities, the front row of working cavities are communicated with a working port I, and the rear row of working cavities are communicated with a working port II; a liquid return valve pad is clamped in a valve stem so as to constitute a valve stem component; the valve stem component is sleeved in a stem sleeve; a valve rod is inserted into a valve sleeve; a protective sleeve and a valve base are clamped in the valve sleeve; the valve rod, the protective sleeve, the valve base and the valve stem constitute a valve sleeve component; a spring and a valve core are arranged in a plug so as to constitute a plug component; one end of the spring props against the plug, the other end of the spring props against the valve core, the plug component and the valve sleeve component are screwed into a whole by virtue of threads, The valve sleeve and the valve sleeve component are connected by virtue of a fastening screw, the valve core and the valve base are in conical sealing, and the valve stem component and the valve rod are in planar sealing, so that a valve core component is formed; the valve core component serving as an integral plug-in piece is loaded into each working cavity. The reversal valve provided by the invention is used for a hydraulic support for a fully mechanized coal mining face.

Description

technical field [0001] The invention relates to a manual reversing valve, in particular to a manual reversing valve used for a hydraulic support of a coal mine fully mechanized mining face. Background technique [0002] In the prior art, the structure of the manual reversing valve is various, such as the "reversing valve with a rated flow rate of 400L / min" disclosed in the Chinese patent (ZL200520003881.9, announcement date: March 28, 2006), which It includes a valve body and an operating mechanism. The valve body is provided with upper and lower working chambers. The upper working chamber and the lower working chamber are connected with liquid inlet and outlet ports. The upper working chamber and the lower working chamber have the same structure. In the coal mining industry, some people also call the reversing valve "control valve". In the hydraulic support control system, the reversing valve controls the direction of the liquid flow, and realizes different actions such as...

AI Technical Summary

Problems solved by technology

However, the currently used manual reversing valves are all assembled with accessories. Due to the defects of the sealing structure, when used underground in many coal mines across the country, there have been phenomena of leakage of the inlet and return liquid, and the sealing surface between the valve and the valve, which is limited by the underground conditions. , the leakage parts cannot be maintained underground in coal mines, which brings many difficulties to underground maintenance, production and replacement

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