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Diaphragm valve

A diaphragm valve, diaphragm technology, applied in safety valves, balance valves, valve devices, etc., to achieve good air tightness and accurate opening pressure

Inactive Publication Date: 2021-11-05
BEIJING INST OF ASTRONAUTICAL SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a high-temperature diaphragm valve for gas medium, which solves the problem of accurately controlling the opening pressure of the diaphragm at high temperature, reversely bearing high pressure without damage, and opening the diaphragm. The problem of not blocking the flow of the valve

Method used

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Embodiment

[0042] In a specific embodiment of the present invention, the diaphragm valve is mainly composed of a housing, a grid plate, a diaphragm, a gasket, a nozzle, and a blocking device. The operating temperature of the diaphragm valve is 1000°C. In order to meet the sufficient strength, toughness, stability of material structure and compatibility with the medium under high temperature conditions, the material is made of superalloy GH4202.

[0043] The grid plate 2, the diaphragm 3 and the washer 4 are welded into a whole, and the grid plate 2 can support the diaphragm not to rupture under reverse high pressure at high temperature. The valve presses the gasket 6 through the shell 1 and the nozzle 5, and the compression gasket 6 uses a graphite mica gasket to ensure the external airtightness of the valve at high temperature and the internal airtightness between the inlet and the outlet. When the valve outlet is under pressure, the circular hole structure grid plate 2 provides reverse...

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Abstract

The invention relates to a diaphragm valve which is characterized by comprising a shell, a filler neck, a diaphragm assembly and a blocking device. The shell and the filler neck are both of tubular structures with stepped holes, and the shell and the filler neck are in butt joint to form a battery valve shell; specifically, the small end of the shell is a diaphragm valve inlet, and the large end of the filler neck is arranged in the large end of the shell; the small end of the filler neck is a diaphragm valve outlet; and the diaphragm assembly is located between the stepped hole in the large end of the shell and the large end face of the filler neck. The valve bears pressure from an outlet to an inlet of the diaphragm valve before working, and is used for isolating high-temperature gas between a gas generator and a gas storage cylinder and protecting upstream elements; in work, the diaphragm assembly is cracked after bearing certain pressure from the inlet to the outlet of the diaphragm valve, and the valve is changed into a circulating state to provide gas for the downstream; and if the diaphragm falls off, the diaphragm can be intercepted by the blocking device, and the downstream of the valve is not affected.

Description

technical field [0001] The invention belongs to the field of valve design, in particular to a diaphragm valve. Background technique [0002] The gas-storage solid gas attitude control system has the advantages of convenient storage, use and maintenance, high gas utilization rate, and controllable impulse output. It has good comprehensive performance and has excellent application prospects in attitude control systems. The diaphragm valve is an important stand-alone unit of the gas attitude control system. It is usually installed between the gas generator and the gas storage cylinder. When the outlet is under pressure, it ensures sealing and isolation of high-temperature gas, and when the inlet is under a certain pressure, it opens to ensure gas circulation. For a certain type of solid gas attitude control system under development, a diaphragm valve with a working temperature of 1000°C and a reverse pressure of up to 30 MPa is required, which can accurately control the opening...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/16
CPCF16K17/16
Inventor 李敏行余武江张宇王丛飞张立强曹荣王健高健崔景芝丁建春王太平尹文辉沈博余海涛武亚楠
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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