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A parallel double disc gate valve with two-way self-relieving structure in the cavity

A technology of self-relieving and double rams, applied in balance valves, devices for pressure relief on sealing surfaces, sliding valves, etc., can solve problems such as ram swelling, actuators cannot be opened, valve damage, etc. To achieve the effect of easy opening and closing, avoiding abnormal rise and saving time

Active Publication Date: 2018-04-17
TINGYU GRP ZHEJIANG FLUID CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a parallel double gate valve with a two-way self-relieving structure in the middle chamber, which can effectively improve the existing parallel double gate valve, which causes the gate to swell and die due to the pressure rise in the middle chamber, and the actuator cannot be opened. , and even accidents such as valve damage

Method used

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  • A parallel double disc gate valve with two-way self-relieving structure in the cavity
  • A parallel double disc gate valve with two-way self-relieving structure in the cavity
  • A parallel double disc gate valve with two-way self-relieving structure in the cavity

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Embodiment 1

[0033] Embodiment one, such as figure 1 to combine figure 2 , Figure 10 to Figure 16 As shown in the figure, a parallel double-gate gate valve with a two-way self-relieving structure in the cavity includes a valve body 1, two gates 2 and a valve stem 12, and a wedge-shaped block 3 and an expansion valve are installed between the two gates 2. Block 4, the gate 2 is provided with a boss 21, and the boss 21 is provided with a stepped through hole 20, and the stepped through hole 20 is provided with a pressure relief system, and the pressure relief system includes a movable core 6, Pressure adjustment block 7, elastic member 8, elastic member holder 9 and sphere 11, the movable core 6 is provided with a bending through hole 65, the pressure adjustment block 7, elastic member 8, elastic member holder 9, sphere 11 are sequentially placed in the bending through hole 65 in the movable core 6, wherein the pressure adjustment block 7 is fixedly connected to the end of the movable co...

Embodiment 2

[0046] Embodiment two, such as Figure 1 to Figure 9 and Figure 15 , Figure 16 As shown in the figure, a parallel double-gate gate valve with a two-way self-relieving structure in the cavity includes a valve body 1, two gates 2 and a valve stem 12, and a wedge-shaped block 3 and an expansion valve are installed between the two gates 2. Block 4, the gate 2 is provided with a boss 21, and a step through hole 20 is arranged in the boss, and a pressure relief system is arranged in the step through hole 20, and the pressure relief system includes a movable core 6, a pressure The adjustment block 7, the elastic member 8, the elastic member fixing seat 9 and the sphere 11, the movable core 6 is provided with a bending through hole 65, the pressure adjustment block 7, the elastic member 8, the elastic member fixing seat 9, and the sphere 11 They are sequentially placed in the bending through hole 65 in the movable core 6, wherein the pressure adjustment block 7 is fixedly connecte...

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Abstract

The invention relates to a parallel double-gate-disc gate valve of a center cavity bi-direction automatic pressure relieving structure. The problems that gate discs are expanded and locked, an actuator cannot be started, even a valve is damaged, and other accidents occur due to the fact that the pressure of a center cavity of an existing parallel double-gate-disc gate valve is raised are mainly solved. According to the parallel double-gate-disc gate valve of the center cavity bi-direction automatic pressure relieving structure, each gate disc is provided with a boss, and a step through hole is formed in each boss and internally provided with a pressure relieving system composed of a movable core, a pressure adjusting block, an elastic piece, an elastic piece fixing base and a ball; bent through holes are formed in the movable cores; the pressure adjusting blocks, the elastic pieces, the elastic piece fixing bases and the balls are sequentially arranged in the bent through holes; first sealing surfaces are arranged in the positions where the bent through holes make contact with the balls; the outer sides of the movable cores are provided with second sealing surfaces; the step through holes are internally provided with third sealing surfaces corresponding to the second sealing surfaces; and the movable cores comprise the left movable core and the right movable core, and the left movable core and the right movable core are movably connected through a connection structure. The parallel double-gate-disc gate valve of the center cavity bi-direction automatic pressure relieving structure is reasonable and simple in structure, capable of meeting the requirements for center cavity pressure relieving of the parallel double-gate-disc gate valve and wide in application range.

Description

technical field [0001] The invention relates to the technical field of parallel double-disc gate valves, in particular to a parallel double-disc gate valve with a middle cavity bidirectional self-relieving pressure structure. Background technique [0002] The medium in the cavity of the parallel double gate valve is accumulated. Due to the change of the external environment, the pressure of the medium in the cavity may rise abnormally, so that the ram will tighten with the sealing surface of the valve seat under the medium pressure in the cavity, and the actuator cannot open the valve. , or the plastic deformation of the gate and the valve body due to the overpressure of the cavity, or even dangerous accidents such as valve bursting, so the pressure relief of the valve cavity is an integral part of the reliable design of the valve. The pressure relief of the cavity is divided into Internal pressure relief and external pressure relief, external pressure relief can be done thr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/02F16K3/314F16K39/04F16K17/04
CPCF16K3/0209F16K3/029F16K17/0406F16K17/048F16K39/04
Inventor 潘叶雷王武
Owner TINGYU GRP ZHEJIANG FLUID CONTROL EQUIP