Non-leakage flat gate valve

Abstract

The invention discloses a non-leakage plate valve, comprising a valve seat, a positioning sleeve, a core sleeve, a valve plate, a valve body, sealing rings and a gate valve adjusting mechanism. The valve plate is hermetically matched with the end surface of the valve seats at the left side and the right side. The valve seat is arranged in the internal chamber of the valve body by the positioning sleeve. The core sleeve has the same axis with the valve body and is matched with the positioning sleeve in a clearance fit way; the sealing rings are arranged between the valve seat and the core sleeve jointing surface and between the core sleeve and the internal wall jointing surface of the valve body. The sealing ring is a rubber product with round or rectangle cross section. The valve seat is closely sealed with the end surface of the valve plate by the rebound deformation of the pressed sealing ring. The non-leakage flat plate gate valve adopts a fission structure, wherein the internal structure of the valve body is simple, and the space is large, which is convenient for machining and detection. The fission parts are easy to be manufactured, the product qualification rate is high, and the product is convenient for maintenance. The non-leakage flat plate gate valve is especially suitable for manufacturing high-pressure plate valves.

Description

technical field [0001] The invention relates to a sealing structure of a gate valve, in particular to a flat gate valve whose valve plate is provided with an automatic compensation sealing structure. Background technique [0002] Gate valve is one of the commonly used valves in pipeline engineering. Slab gate valve is a kind of gate valve. Its structural feature is that the equal-thickness valve plate cooperates with the end faces of the two valve seats in the valve body, and the radial adjustment of the matching position between the valve plate and the valve wall can adjust the flow of liquid medium through the valve. Seat circulation. Although the slab gate valve has a compact structure and higher pressure than similar valves, its inner cavity space is small, and it is difficult to directly process the valve seat on the valve body, and it is inconvenient to measure, and it is difficult to ensure the processing accuracy of the valve seat. The manufacturing accuracy of the...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the shortcomings of the valve seat with the same body structure in the valve body in the prior art, which is difficult to process, inconvenient to measure, and has poor sealing performance between the valve seat and the valve plate, and proposes a valve seat with a split structure in the valve body. A non-leakage slab gate valve with axial displacement, the valve has a simple structure, easy manufacture, automatic gap compensation, and reliable sealing

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