CN113606370A - Diaphragm valve - Google Patents
Diaphragm valve Download PDFInfo
- Publication number
- CN113606370A CN113606370A CN202110725979.9A CN202110725979A CN113606370A CN 113606370 A CN113606370 A CN 113606370A CN 202110725979 A CN202110725979 A CN 202110725979A CN 113606370 A CN113606370 A CN 113606370A
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- diaphragm
- valve
- shell
- filler neck
- diaphragm valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
- F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention relates to a diaphragm valve which is characterized by comprising a shell, a filler neck, a diaphragm assembly and a stopping device; casing, filler neck are the tubular structure who has the step hole, and casing and filler neck dock each other and constitute the battery valve casing, specifically do: the small end of the shell is a diaphragm valve inlet, the large end of the filler neck is arranged in the large end of the shell, and the small end of the filler neck is a diaphragm valve outlet; the diaphragm assembly is positioned between the step hole at the large end of the shell and the end surface of the large end of the filler neck; before the valve works, the pressure from the outlet to the inlet of the diaphragm valve is borne, and the valve is used for isolating high-temperature fuel gas between the fuel gas generator and the gas storage cylinder and protecting upstream elements; when the diaphragm valve works, after bearing a certain pressure from the inlet to the outlet of the diaphragm valve, the diaphragm assembly cracks, the valve becomes a circulation state, gas is provided to the downstream, and if the diaphragm falls off, the gas can be intercepted by the arresting device without influencing the downstream of the valve.
Description
Technical Field
The invention belongs to the field of valve design, and particularly relates to a diaphragm valve.
Background
The gas storage type solid gas attitude control system has the advantages of convenience in storage, use and maintenance, high gas utilization rate, controllability in impulse output and the like, has good comprehensive performance, and has excellent application prospect on the attitude control system. The diaphragm valve is an important single machine of a gas attitude control system, is usually arranged between a gas generator and a gas storage cylinder, ensures the sealing and the isolation of high-temperature gas when an outlet bears pressure, and ensures the gas circulation when an inlet bears certain pressure. Aiming at a certain developed solid gas attitude control system, a diaphragm valve with the working temperature of 1000 ℃ and the reverse bearing pressure of 30MPa is needed, and the system has the difficulties of accurately controlling the opening pressure of the diaphragm at high temperature, not damaging the reverse bearing high pressure, not blocking the circulation of the valve after the diaphragm is opened and the like. The current diaphragm valve in China can not meet the requirement. Therefore, it is necessary to develop a research work on a high temperature resistant membrane valve to meet the use requirement of the system.
Disclosure of Invention
The technical problem solved by the invention is as follows: the invention overcomes the defects of the prior art, provides a high-temperature diaphragm valve for a gas medium, and solves the problems that the opening pressure of a diaphragm is accurately controlled at high temperature, the high pressure is reversely born without damage, and the valve is not blocked after the diaphragm is opened.
The technical scheme of the invention is as follows: a diaphragm valve comprises a shell, a filler neck, a diaphragm assembly and a blocking device;
casing, filler neck are the tubular structure who has the step hole, and casing and filler neck dock each other and constitute the diaphragm valve casing, specifically do: the small end of the shell is a diaphragm valve inlet, the large end of the filler neck is arranged in the large end of the shell, and the small end of the filler neck is a diaphragm valve outlet; the diaphragm assembly is positioned between the step hole at the large end of the shell and the end surface of the large end of the filler neck;
before the valve works, the pressure from the outlet to the inlet of the diaphragm valve is borne, and the valve is used for isolating high-temperature fuel gas between the fuel gas generator and the gas storage cylinder and protecting upstream elements; when the diaphragm valve works, after bearing a certain pressure from the inlet to the outlet of the diaphragm valve, the diaphragm assembly cracks, the valve becomes a circulation state, gas is provided to the downstream, and if the diaphragm falls off, the gas can be intercepted by the arresting device without influencing the downstream of the valve.
The diaphragm assembly comprises a grid plate, a diaphragm and a gasket;
the grid plate is positioned on the end face of the stepped hole of the shell, the diaphragm is tightly attached to the grid plate, a gasket is arranged between the diaphragm and the large end face of the filler neck, the single face of the diaphragm is provided with nicks, and when the face where the nicks are positioned bears certain pressure, the diaphragm cracks.
The grid plate, the membrane and the gasket are integrated through welding.
The diaphragm is made of high-temperature alloy GH4202 material.
Preferably, the diaphragm valve further comprises a pressure pad;
the pressing gasket is positioned in the groove of the end face of the stepped hole of the shell and used for realizing sealing between the grid plate and the end face of the stepped hole of the shell.
The pressing gasket is made of a graphite mica gasket.
The grid plate is a round hole structure grid plate and is provided with a plurality of round holes which are uniformly distributed around the center of the grid plate.
The diaphragm is a flat-plate diaphragm, and the nick form is a single hinge form.
The blocking device is of a conical structure, the conical bottom part is close to the small end of the filler neck, and the conical top part is close to the diaphragm, so that the flow area of the valve after the diaphragm falls off can be still larger than the drift diameter area of the valve port.
The gasket is made of high-temperature alloy GH4202 material.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention provides a diaphragm assembly with a reverse support grid plate, which can effectively prevent a diaphragm from cracking under reverse pressure;
(2) the blocking device is arranged in the valve, so that the diaphragm can be prevented from falling off and blocking circulation;
(3) the blocking device is of a conical structure, so that the flow area of the valve can still be larger than the diameter area of the valve port after the diaphragm falls off.
(4) The diaphragm assembly is of an integral welding structure, is a flat plate type single-hinge high-temperature alloy diaphragm, can be suitable for a high-temperature environment of 1000 ℃, and can realize accurate opening pressure and good air tightness of the valve at high temperature.
Drawings
FIG. 1 is a cross-sectional view of a diaphragm valve according to an embodiment of the present invention;
FIG. 2 is a view showing the structure of a support grid according to an embodiment of the present invention;
fig. 3 is a structural view of a stopping device according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples.
As shown in fig. 1, the present invention provides a diaphragm valve comprising a housing 1, a filler neck 5, a diaphragm assembly and a stop 7;
casing 1, filler neck 5 are the tubular structure who has the step hole, and casing 1 and filler neck 5 dock each other and constitute the battery valve casing, specifically are: the small end of the shell 1 is an inlet of a diaphragm valve, the large end of the filler neck 5 is arranged in the large end of the shell 1, and the small end of the filler neck 5 is an outlet of the diaphragm valve; the diaphragm assembly is positioned between the step hole at the large end of the shell 1 and the end surface at the large end of the filler neck 5;
before the valve works, the pressure from the outlet to the inlet of the diaphragm valve is borne, and the valve is used for isolating high-temperature fuel gas between the fuel gas generator and the gas storage cylinder and protecting upstream elements; when the diaphragm valve works, after bearing a certain pressure from the inlet to the outlet of the diaphragm valve, the diaphragm assembly cracks, the valve becomes a circulation state, gas is provided to the downstream, and if the diaphragm 3 falls off, the gas can be intercepted by the intercepting device 7 without influencing the downstream of the valve.
Preferably, the membrane assembly comprises a grid 2, a membrane 3 and a gasket 4;
the grid plate 2 is positioned on the end face of the stepped hole of the shell 1, the diaphragm 3 is tightly attached to the grid plate 2, a gasket 4 is arranged between the diaphragm 3 and the large end face of the filler neck 5, the single face of the diaphragm 3 is provided with nicks, and when the face where the nicks are positioned bears certain pressure, the diaphragm cracks.
Preferably, grid 2, membrane 3 and gasket 4 are made in one piece by welding, ensuring the tightness between grid 2, membrane 3 and gasket 4.
Preferably, the diaphragm 3 is made of a high-temperature alloy GH4202 material, so that the structural strength of the valve at high temperature is guaranteed.
The diaphragm valve also comprises a compression gasket 6;
the pressing gasket 6 is positioned in a groove of the end face of the step hole of the shell 1 and used for realizing the sealing between the grid plate 2 and the end face of the step hole of the shell 1.
Preferably, the compression gasket 6 is made of a graphite mica gasket.
Preferably, the grid plate 2 is a round hole structure grid plate provided with a plurality of round holes, and the round holes are uniformly distributed around the center of the grid plate. The barrier structure ensures that the diaphragm is not damaged under reverse pressure. As shown in fig. 2.
Preferably, the membrane is a flat plate type membrane, and the scoring form is a single-hinge type membrane, so that the strength of the product in a high-temperature and high-pressure environment and the stability of the rupture pressure at high temperature can be simultaneously met.
Preferably, the arresting device 7 is a hollow conical structure, the conical bottom part is close to the small end of the filler neck 5, and the conical top part is close to the membrane 3, so that the flow area of the valve after the membrane falls off can be still larger than the diameter area of the valve port. As shown in fig. 3.
Preferably, the gasket 4 is a graphite gasket. Ensuring the air tightness performance at high temperature.
Example (b):
in one embodiment of the invention, the diaphragm valve is mainly composed of a shell, a grid plate, a diaphragm, a gasket, a pipe connecting nozzle, a stopping device and the like. The working temperature of the diaphragm valve is 1000 ℃, and in order to meet the requirements of sufficient strength, toughness, stability of material structure and compatibility with a medium under a high-temperature condition, the material adopts high-temperature alloy GH 4202.
The grid plate 2, the membrane 3 and the gasket 4 are integrated by welding, and the grid plate 2 can support the membrane under high temperature and reverse high pressure without cracking. The valve compresses the gasket 6 through the shell 1 and the filler neck 5, and the graphite mica gasket is adopted as the gasket 6, so that the external air tightness of the valve at high temperature and the internal air tightness between the inlet and the outlet are ensured. When the valve outlet bears pressure, the round hole structure grid plate 2 provides reverse support, and the diaphragm 3 is guaranteed not to be damaged under reverse high pressure. When the valve positively bears a certain pressure, the diaphragm is broken and opened along the nick, gas can flow to the outlet along the valve, in order to ensure the flow area of the broken diaphragm and the stability of the breaking pressure, the diaphragm adopts a flat-plate diaphragm, and the nick form adopts a single hinge type. If the diaphragm 3 falls off, the diaphragm can be intercepted by the intercepting device 7, a downstream system cannot be influenced, and meanwhile, the conical structure of the intercepting device 7 can enable the flow area of the valve after the diaphragm falls off to be still larger than the drift diameter area of the valve interface.
The invention has the following 3 characteristics:
1. the diaphragm valve structure suitable for the high temperature of 1000 ℃ is provided, and the accurate opening pressure and good air tightness of the valve at the high temperature can be realized;
2. the high-temperature alloy slave component with the reverse support grid plate is provided, and the diaphragm can be effectively prevented from being broken under reverse pressure;
3. the blocking device with the conical structure can ensure that the flow area of the valve can still meet the requirement that the flow area is larger than the diameter area of a valve port after a diaphragm falls off.
By utilizing the high-temperature diaphragm valve structure provided by the invention, good sealing performance under the condition of reversely bearing 1000 ℃ high temperature and 30MPa pressure can be realized in a closed state, when the pressure difference between an inlet and an outlet is increased to about 8MPa pressure, the diaphragm is broken and opened, the upstream and the downstream are communicated, the blocking phenomenon caused by accidental falling of the diaphragm can be prevented, and the effective flow area of the valve can be ensured.
The structure can be used for isolating valves of various gas media at high temperature and normal temperature, and can be widely applied to gas attitude control systems of various rockets and missiles.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. The diaphragm valve is characterized by comprising a shell (1), a filler neck (5), a diaphragm assembly and a blocking device (7);
casing (1), filler neck (5) are the tubular structure who has the step hole, and casing (1) and filler neck (5) dock each other and constitute the diaphragm valve casing, specifically are: the small end of the shell (1) is an inlet of a diaphragm valve, the large end of the filler neck (5) is arranged in the large end of the shell (1), and the small end of the filler neck (5) is an outlet of the diaphragm valve; the diaphragm assembly is positioned between the step hole at the large end of the shell (1) and the end surface at the large end of the filler neck (5);
before the valve works, the pressure from the outlet to the inlet of the diaphragm valve is borne, and the valve is used for isolating high-temperature fuel gas between the fuel gas generator and the gas storage cylinder and protecting upstream elements; when the diaphragm valve works, after bearing a certain pressure from the inlet to the outlet of the diaphragm valve, the diaphragm assembly cracks, the valve becomes a circulation state, gas is provided to the downstream, and if the diaphragm (3) falls off, the gas can be intercepted by the intercepting device (7), so that the downstream of the valve is not influenced.
2. A diaphragm valve according to claim 1, characterised in that the diaphragm assembly comprises a grid (2), a diaphragm (3) and a washer (4);
the grid plate (2) is positioned on the end face of the stepped hole of the shell (1), the diaphragm (3) is tightly attached to the grid plate (2), a gasket (4) is arranged between the diaphragm (3) and the large-end face of the pipe connecting nozzle (5), the single face of the diaphragm (3) is provided with nicks, and when the face where the nicks are positioned bears certain pressure, the diaphragm cracks.
3. A diaphragm valve according to claim 2, characterised in that the grid (2), diaphragm (3) and washer (4) are integrated by welding.
4. A diaphragm valve according to claim 2, characterized in that the diaphragm (3) is made of high temperature alloy GH4202 material.
5. A diaphragm valve according to claim 1, characterised by further comprising a pressure washer (6);
the pressing gasket (6) is positioned in a groove of the end face of the step hole of the shell (1) and used for realizing sealing between the grid plate (2) and the end face of the step hole of the shell (1).
6. A diaphragm valve according to claim 5, characterised in that the pressure washer (6) is made of a graphite mica washer.
7. A diaphragm valve according to claim 1, wherein the plate (2) is a circular hole structured plate provided with a plurality of circular holes, the circular holes being evenly distributed around the center of the plate.
8. The diaphragm valve of claim 1 wherein said diaphragm is a flat diaphragm and said score pattern is a single hinge.
9. The diaphragm valve according to claim 1, wherein the arresting device (7) is a hollow conical structure, the bottom of the cone is close to the small end of the pipe connecting nozzle (5), and the top of the cone is close to the diaphragm (3), so that the flow area of the valve can be larger than the diameter area of the valve port after the diaphragm falls off.
10. A diaphragm valve according to claim 1, wherein the gasket (4) is made of a high temperature alloy GH4202 material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725979.9A CN113606370A (en) | 2021-06-29 | 2021-06-29 | Diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725979.9A CN113606370A (en) | 2021-06-29 | 2021-06-29 | Diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113606370A true CN113606370A (en) | 2021-11-05 |
Family
ID=78336934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110725979.9A Pending CN113606370A (en) | 2021-06-29 | 2021-06-29 | Diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113606370A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB578008A (en) * | 1941-11-07 | 1946-06-12 | Asiatic Petroleum Co Ltd | Improvements in rupturing diaphragms used as valves |
| JPH07293726A (en) * | 1994-04-21 | 1995-11-10 | Nisshin Chem Kogyo Kk | Rupture type safety valve |
| CN103591338A (en) * | 2013-11-30 | 2014-02-19 | 沈阳航天新光集团有限公司 | Electric blasting valve |
| US20140263030A1 (en) * | 2013-03-14 | 2014-09-18 | Kidde Technologies, Inc. | Valve mechanism comprising an improved means of filtering |
| CN204403498U (en) * | 2014-12-26 | 2015-06-17 | 赵钱 | A kind of explosion pressure relief device |
| CN110822148A (en) * | 2019-11-15 | 2020-02-21 | 西安航天动力研究所 | High-precision anti-drop diaphragm valve |
-
2021
- 2021-06-29 CN CN202110725979.9A patent/CN113606370A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB578008A (en) * | 1941-11-07 | 1946-06-12 | Asiatic Petroleum Co Ltd | Improvements in rupturing diaphragms used as valves |
| JPH07293726A (en) * | 1994-04-21 | 1995-11-10 | Nisshin Chem Kogyo Kk | Rupture type safety valve |
| US20140263030A1 (en) * | 2013-03-14 | 2014-09-18 | Kidde Technologies, Inc. | Valve mechanism comprising an improved means of filtering |
| CN103591338A (en) * | 2013-11-30 | 2014-02-19 | 沈阳航天新光集团有限公司 | Electric blasting valve |
| CN204403498U (en) * | 2014-12-26 | 2015-06-17 | 赵钱 | A kind of explosion pressure relief device |
| CN110822148A (en) * | 2019-11-15 | 2020-02-21 | 西安航天动力研究所 | High-precision anti-drop diaphragm valve |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211105 |
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| RJ01 | Rejection of invention patent application after publication |