Self-sensing compression type high-sealing-performance straight-through gate valve

Abstract

The invention discloses a self-sensing compression type high-sealing-performance straight-through gate valve, and belongs to the technical field of valves. The self-sensing compression type high-sealing-performance straight-through gate valve improves the sealing effect and triggers secondary compression action after abrasion by adopting a novel elastic filler for sealing and utilizing the magnetic field repulsive effect to always keep high compressibility on a compressed inner layer. The relatively constant compression effect is always maintained; the compressed inner layer after compressionis shaped on the basis of the one-way mobility of a sensing rod, so that the compression effect is prevented from being interfered under the action of a high-pressure medium, and the sealing stabilityof the compressed inner layer is well kept; and when the medium leaks, the sensing rod can sense the leakage of the medium in time, the high-strength magnetic field repulsive effect is quickly triggered, and then the maximum sealing property of the compressed inner layer is realized. Compared with an existing straight-through gate valve, the self-sensing compression type high-sealing-performancestraight-through gate valve has the advantage that the high-strength sealing performance can be kept all the time in a sensing compression mode.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a self-sensing compression type high-tightness straight-through gate valve. Background technique [0002] The gate valve is a gate of the opening and closing part. The direction of movement 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 or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be surfacing with metal materials to increase wear resistance, such as surfacing welding 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] The opening and closing part of the gate valve is the gate, and the movement direction of the gate is perpendicular to the direction...

AI Technical Summary

Problems solved by technology

[0004] The sealing surface of the gate valve is made of stainless steel and hard alloy, with long service life, PTFE packing, reliable sealing, light and flexible operation, easy to cause erosion and abrasion between the sealing surfaces, difficult to maintain, and once erosion and abrasion occur , the reliability of the sealing is seriously reduced, which can easily lead to medium leakage.

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