Bottom valve

The invention discloses a bottom valve, which is used for the bottom of a secondary oil cylinder of a vertical column of a hydraulic support of a coal mine, and mainly aims to solve the technical problems that the existing bottom valve is small in flow, has a gap and can be loosened and unscrewed af...

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Bibliographic Details
Main Authors WANG RUNHONG, YANG WANCHAO, ZHANG QIAOQIAO
Format Patent
LanguageChinese
English
Published 29.03.2024
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:The invention discloses a bottom valve, which is used for the bottom of a secondary oil cylinder of a vertical column of a hydraulic support of a coal mine, and mainly aims to solve the technical problems that the existing bottom valve is small in flow, has a gap and can be loosened and unscrewed after long time and the like. The bottom valve comprises a valve cover, a reset spring, a piston, a valve pad, a valve pad assembly, a valve seat and an anti-loosening plug. An opposite side platform for fixing an open spanner is arranged on the outer side of the left end of the valve cover, an inner cavity is formed in the valve cover, a reset spring, a piston, a valve pad and a valve pad assembly are sequentially arranged in the inner cavity of the valve cover, liquid outlet holes A are evenly formed in the middle section of the valve cover and connected with the inner cavity of the valve cover, and the right end of the valve cover is in threaded connection with the left end of the valve seat; an outer hexagonal bo
Bibliography:Application Number: CN202211157986