Integral plug-in valve core assembly for hand-operated direction valve

Abstract

The invention relates to an integral plug-in valve core assembly for a hand-operated direction valve. A plug (1) consists of a left cavity (11), a right cavity (13) and a groove (12) along the circumference of the right cavity (13), which are communicated axially and sequentially; the plug (1) is rotationally connected with a valve bush (2) by a steel ball (11); the valve bush (2) is connected with a high-pressure valve bush (9) by a steel wire key (7); a valve seat (6) is arranged at a connecting part between the valve bush (2) and the high-pressure valve bush (9); the valve seat (6) and a valve core (5) form linear sealing; a spring (8) is mounted on the external circumference of the valve core (5) in a sleeving manner; a valve rod assembly and the valve core (5) are mounted on the left side and the right side of an inner cavity formed by the valve bush (2) and the high-pressure valve bush (9) respectively; and sealing rings (13) are mounted at the left ends of the valve rod assembly and the valve core (5) in a sleeving manner. The integral plug-in valve core assembly adopts floating integral plug-in valve design, is more compact in structure, smoother in liquid way, more reliable in sealability, and quick to assemble, and facilitates underground replacement and maintenance.

Description

technical field [0001] The invention belongs to the field of manual reversing valves, and in particular relates to an integral plug-in valve core assembly for a manual reversing valve. Background technique [0002] At present, in the coal mine industry in China, the manual reversing valve is one of the important hydraulic control components of the hydraulic support for coal mines. In the hydraulic control system of the hydraulic support, the direction of the liquid flow is controlled to realize the lifting of the column, the expansion and contraction of the oil cylinder or the jack, and then complete various functions such as hydraulic support support, frame shifting, pushing, anti-falling, and top coal caving. operate. Due to the severe on-site conditions of fully mechanized mining working faces in coal mines and the presence of a large amount of corrosive substances and coal ash, the performance and reliability of manual reversing valves are highly required, but limited ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects such as poor anti-pollution ability and inconvenient installation and disassembly of existing manual reversing valves, the present invention provides an integral plug-in valve core assembly for manual reversing valves.

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