Pressure automatic leakage stopping type gate valve

Abstract

The invention discloses a pressure automatic leakage stopping type gate valve, and belongs to the field of gate valves. According to the scheme, the problems that when a valve plate in the gate valve is still closed and is not tight after being closed and leakage occurs, generated air pressure enters pressure inlet holes in two sides and flows into air inlet holes, an expansion air bag expands under the action of pressure, a sealing piece is gradually extruded when the expansion air bag continuously expands upwards, a sealing layer is attached to the surface of the valve plate to plug the gate valve, after the sealing layer is attached to the surface of the valve plate, one layer of the surface of the sealing layer is bonded to the surface of the valve plate, the thickness of the surface of the valve plate is increased, and the phenomenon of leakage is not prone to occurring in the gate valve plugging process of the valve plate next time are solved. When the phenomenon of continuous leakage still occurs next time, the sealing layer continues to be bonded to the surface of the valve plate to plug the valve plate, so that the gate valve has the automatic leakage stopping and repairing functions after leakage, the working efficiency of the gate valve is improved, and the phenomenon that the gate valve needs to be disassembled and maintained multiple times is avoided.

Description

technical field [0001] The invention relates to the field of gate valves, in particular to a pressure automatic leak-proof gate valve. Background technique [0002] The gate valve is an opening and closing gate, the movement direction of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled, the gate valve is sealed by the contact between the valve seat and the gate, usually sealed The surface will be surfacing with metal materials to increase wear resistance, such as surfacing 1Cr13, STL6, stainless steel, etc. There are rigid gate valves and elastic gate valves. According to the different gate valves, gate valves are divided into rigid gate valves and elastic gate valves. [0003] At present, during the use of the gate valve, the valve plate may wear out under long-term use, resulting in pressure leakage of the gate valve, and every time the pressure leaks, the staff will was...

AI Technical Summary

Problems solved by technology

[0003] At present, during the use of the gate valve, the valve plate may wear out under long-term use, resulting in pressure leakage of the gate valve, and every time the pressure leaks, the staff will waste a lot of time when disassembling, repairing or replacing it. Labor cost and time, especially when the gate valve is installed in a place that is difficult to disassemble, the staff will often be more cumbersome when disassembling

Images