CN113202967A - Ultralow temperature switch valve for low temperature wind tunnel - Google Patents
Ultralow temperature switch valve for low temperature wind tunnel Download PDFInfo
- Publication number
- CN113202967A CN113202967A CN202110478023.3A CN202110478023A CN113202967A CN 113202967 A CN113202967 A CN 113202967A CN 202110478023 A CN202110478023 A CN 202110478023A CN 113202967 A CN113202967 A CN 113202967A
- Authority
- CN
- China
- Prior art keywords
- valve
- wind tunnel
- corrugated pipe
- piston
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Temperature-Responsive Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses an ultralow temperature switch valve for a low temperature wind tunnel, which comprises a valve seat, an integrated valve body, a piston rod and a valve shell, wherein the valve cover and the valve shell are connected by bolts to form a valve closing driving pressure cavity; the upper end of the piston rod penetrates through the valve cover and is connected with a valve clack, and the valve clack and the valve seat form a sealing pair; an inner pressure cavity is formed in the inner cavity above the small piston; the valve cover, the large corrugated pipe and the large piston are connected together to form a vacuum heat insulation cavity. The integrated valve body and the low-temperature wind tunnel are integrally designed, so that the integrated valve body is compact in overall structure and small in overall size, and is beneficial to compact layout of a liquid nitrogen injection loquat frame; the invention adopts high-pressure nitrogen as the closing driving force of the switch valve, can be used in the ultralow temperature environment (196 ℃ below zero), and the nitrogen pressure can be adjusted along with the low-temperature wind tunnel pressure, so that the application range is wide; the opening and closing combination of the valve group formed by the switch valves can realize the accurate control of the low-temperature wind tunnel temperature, and the total temperature control accuracy of the wind tunnel test section is improved.
Description
Technical Field
The invention relates to the field of low-temperature wind tunnel test valves, in particular to an ultralow-temperature switch valve for a low-temperature wind tunnel.
Background
In the low-temperature wind tunnel test, a large test Reynolds number is generally obtained by adopting a low-temperature technology. The temperature of the test environment is reduced by spraying liquid nitrogen to a wind tunnel loop and evaporating and absorbing a large amount of heat, and the temperature of the test environment is lowered to-196 ℃.
The liquid nitrogen is sprayed by the spraying harrow arranged at the upstream of the power section, and nozzles with different flow rates and different quantities are arranged on each spraying harrow rack. When the wind tunnel operates, the low-temperature switch valve controls the opening and closing of the liquid nitrogen nozzle, and the control of the liquid nitrogen flow is realized according to the difference of the number of opened large and small flow nozzles. The response speed and the opening and closing sensitivity of liquid nitrogen injection are important for the precision of the low-temperature wind tunnel injection system. In order to reduce the influence on the flow field, the switch valve needs to be installed inside the jet rake frame, so that the valve body and the driving head of the valve can adapt to the deep cooling environment of the wind tunnel, and the valve body and the driving head are as small as possible and compact in layout.
The low-temperature switch valve used in domestic industry at present is a low-temperature electromagnetic valve, the working temperature range of a driving part of the low-temperature switch valve is generally-50-0 ℃, and the low-temperature switch valve cannot meet the special working condition requirement of the cryogenic environment of a low-temperature wind tunnel. Therefore, an ultralow temperature switch valve for a low temperature wind tunnel is provided.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides an ultralow temperature switch valve for a low-temperature wind tunnel, which aims to overcome the technical problems in the prior related art.
The technical scheme of the invention is realized as follows:
an ultralow temperature switch valve for a low temperature wind tunnel comprises a valve seat, an integrated valve body, a piston rod and a valve casing, wherein the valve seat is welded on the integrated valve body;
the piston rod is provided with a small piston, the small piston is slidably mounted in the inner cavity, the upper end of the piston rod penetrates through the valve cover and is connected with a valve clack, the valve clack and the valve seat form a sealing pair, and the lower end of the piston rod slidably penetrates through the bottom of the inner cavity and is connected with a large piston;
the lower part of the piston rod is sleeved with a small corrugated pipe, the upper end of the small corrugated pipe is hermetically welded at the lower part of the small piston, the lower end of the small corrugated pipe is hermetically welded at the bottom of the inner cavity, an inner pressure cavity is formed in the inner cavity above the small piston, and the top of the valve cover is provided with a through hole;
the vacuum heat insulation valve is characterized in that a large corrugated pipe is sleeved on the outer side of the valve cover, the upper end of the large corrugated pipe is welded on the valve cover in a sealing mode, the lower end of the large corrugated pipe is welded on the large piston in a sealing mode, and the valve cover, the large corrugated pipe and the large piston are connected to form a vacuum heat insulation cavity together.
Furthermore, a driving interface is arranged on the valve shell and is in butt joint with a high-pressure nitrogen driving air source; the valve cover is provided with a vacuum interface, one end of the vacuum interface is communicated with the inside of the vacuum heat insulation cavity, and the other end of the vacuum interface is in butt joint with the vacuum tank.
Furthermore, the upper part of the through hole is communicated with the inside of the integrated valve body, and the lower end of the through hole is communicated with the upper part of the inner cavity.
Further, the large corrugated pipe and the small corrugated pipe are both arranged to be of a sealing elastic structure.
Further, the upper part of the valve seat is in butt joint connection with the nozzle at the working end through threads.
Further, the integrated valve body and the low-temperature wind tunnel are arranged into an integrated structure.
The invention has the beneficial effects that:
1. the ultralow temperature switch valve for the low-temperature wind tunnel provided by the invention has the advantages that the integrated valve body and the low-temperature wind tunnel are integrally designed, the outlet of the valve seat is directly butted with the nozzle at the working end, the integrated valve body is used as a flow channel of the low-temperature wind tunnel, and a driving air source is communicated in the valve shell to be used as power, so that the integrated valve body is compact in integral structure, small in appearance size and beneficial to compact layout of a liquid nitrogen injection loquat frame.
2. The ultralow temperature switch valve for the low-temperature wind tunnel provided by the invention forms dynamic seal through the double-corrugated-pipe structure of the large corrugated pipe and the small corrugated pipe, eliminates leakage at a piston rod, effectively isolates nitrogen gas of an air source and liquid nitrogen of a pipeline, and meanwhile, the corrugated pipe is of a sealing elastic structure, can be used as a spring, and can be used as the opening force of the switch valve together with the pressure of working medium in the pipeline, and the ultralow temperature switch valve has a simple structure and does not need maintenance and driving force.
3. According to the ultralow temperature switch valve for the low-temperature wind tunnel, provided by the invention, high-pressure nitrogen is used as the closing driving force of the switch valve, the switch valve can be used in an ultralow temperature environment (196 ℃ below zero), the nitrogen pressure can be adjusted along with the low-temperature wind tunnel pressure, and the application range is wide.
4. According to the ultralow temperature switch valve for the low-temperature wind tunnel, provided by the invention, the switch valve is driven to be automatically opened by low-temperature fluid, and the switch valve is driven to be closed by normal-temperature nitrogen; the opening and closing combination of the valve group formed by the switch valves can realize the accurate control of the low-temperature wind tunnel temperature, and the total temperature control accuracy of the wind tunnel test section is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of an ultra-low temperature switching valve for a low temperature wind tunnel according to an embodiment of the present invention.
In the figure:
1. a valve seat; 2. an integrated valve body; 3. a valve flap; 4. a piston rod; 5. a valve cover; 6. a large bellows; 7. a small corrugated tube; 8. a large piston; 9. a valve housing; 10. a working end nozzle; 11. a drive interface; 12. a vacuum interface; 13. a through hole; 14. a small piston; 15. an inner cavity; 16. a vacuum insulation chamber; 17. the valve-closing actuation pressure chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The first embodiment is as follows:
in accordance with an embodiment of the present invention,
referring to fig. 1, an ultra-low temperature switch valve for a low temperature wind tunnel includes a valve seat 1, an integrated valve body 2, a piston rod 4 and a valve housing 9, wherein the integrated valve body 2 and the low temperature wind tunnel are integrated; the valve seat 1 is welded on the integrated valve body 2, the upper end of the valve casing 9 is provided with the valve cover 5, the valve cover 5 and the valve casing 9 are connected by bolts to form a valve closing driving pressure cavity 17, the valve cover 5 is arranged at the lower part of the integrated valve body 2, and an inner cavity 15 is arranged inside the valve cover 5; be equipped with little piston 14 on the piston rod 4, little piston 14 slidable mounting is in inner chamber 15, and the upper end of piston rod 4 runs through valve gap 5 and is connected with valve clack 3, and valve clack 3 constitutes sealed vice with disk seat 1, and the upper portion of disk seat 1 passes through screw thread and working end nozzle 10 butt joint connection, and the lower extreme of piston rod 4 slides and runs through inner chamber 15 bottom and is connected with big piston 8.
The lower part of the piston rod 4 is sleeved with a small corrugated pipe 7, the upper end of the small corrugated pipe 7 is hermetically welded at the lower part of a small piston 14, the lower end of the small corrugated pipe 7 is hermetically welded at the bottom of an inner cavity 15, an inner pressure cavity is formed in the inner cavity 15 and positioned above the small piston 14, a through hole 13 is formed in the top of the valve cover 5, the upper part of the through hole 13 is communicated with the inside of the integrated valve body 2, and the lower end of the through hole 13 is communicated with the upper part of the inner cavity 15; the outer side of the valve cover 5 is sleeved with a large corrugated pipe 6, the upper end of the large corrugated pipe 6 is welded on the valve cover 5 in a sealing mode, the lower end of the large corrugated pipe 6 is welded on the large piston 8 in a sealing mode, and the valve cover 5, the large corrugated pipe 6 and the large piston 8 are connected to form a vacuum heat insulation cavity 16.
When the device is implemented, the valve shell 9 is provided with a driving interface 11, and the driving interface 11 is in butt joint with a high-pressure nitrogen driving air source; the valve cover 5 is provided with a vacuum interface 12, one end of the vacuum interface 12 is communicated with the inside of the vacuum heat insulation cavity 16, and the other end of the vacuum interface 12 is butted with a vacuum tank. The vacuum tank is used for ensuring that the space between the large corrugated pipe 6 and the small corrugated pipe 7 is in a vacuum state, effectively reduces the external heat transfer of the cavity of the small corrugated pipe 7, and has the advantages of simple and compact structure, and convenient disassembly, assembly and maintenance.
When the valve closing device is used, the large corrugated pipe 6 and the small corrugated pipe 7 are both arranged to be of a sealing elastic structure, specifically, a spring can be embedded in the corrugated pipes, and the double corrugated pipes realize the isolation among the inner pressure cavity, the vacuum heat insulation cavity 16 and the valve closing driving pressure cavity 17.
The specific working process is as follows:
the maximum pressure of the low-temperature wind tunnel is 11.5atm, the pressure acts on the upper surface of the small piston 14 through the through hole 13 on the valve cover 5, and the valve clack 3 is in a normally open state; when the switch valve needs to be closed, the high-pressure nitrogen source is opened, and because the pressure of the high-pressure nitrogen source is greater than the maximum pressure of the low-temperature wind tunnel, and the acting force area of the large piston 8 is greater than that of the small piston 14, the piston rod 4 overcomes the pressure of the low-temperature wind tunnel and the elasticity of the large corrugated pipe 6 and the small corrugated pipe 7 to push the valve clack 3 to move towards the valve seat 1, the switch valve is closed, and liquid nitrogen is not sprayed into the wind tunnel loop any more.
When liquid nitrogen needs to be sprayed in the wind tunnel loop, a high-pressure nitrogen source is cut off, the valve clack 3 is separated from the valve seat 1 under the combined action of low-temperature wind tunnel pressure and the large corrugated pipe 6 and the small corrugated pipe 7, the switch valve is opened, and the liquid nitrogen in the pipeline is sprayed into the wind tunnel loop through the working end nozzle 10.
In summary, with the above technical solution of the present invention,
according to the ultralow temperature switch valve for the low-temperature wind tunnel, the integrated valve body 2 and the low-temperature wind tunnel are integrally designed, the outlet of the valve seat 1 is directly butted with the nozzle 10 at the working end, the integrated valve body 2 is used as a flow channel of the low-temperature wind tunnel, and a driving air source is communicated in the valve shell 9 to be used as power, so that the ultralow temperature switch valve is compact in overall structure, small in overall size and beneficial to compact layout of a liquid nitrogen injection loquat frame.
The ultralow temperature switch valve for the low-temperature wind tunnel provided by the invention forms dynamic seal through the double-corrugated-pipe structure of the large corrugated pipe and the small corrugated pipe, eliminates leakage at the position of the piston rod 4, effectively isolates nitrogen gas of an air source and liquid nitrogen of a pipeline, and meanwhile, the corrugated pipe is of a sealing elastic structure, can be used as a spring, and can be used as the opening force of the switch valve together with the pressure of working medium in the pipeline, and the ultralow temperature switch valve has a simple structure and does not need maintenance and driving force.
The ultralow temperature switch valve for the low-temperature wind tunnel provided by the invention adopts high-pressure nitrogen as the switching valve closing driving force, the nitrogen pressure can be adjusted along with the low-temperature wind tunnel pressure, and the application range is wide.
According to the ultralow temperature switch valve for the low-temperature wind tunnel, provided by the invention, the switch valve is driven to be automatically opened by low-temperature fluid, and the switch valve is driven to be closed by normal-temperature nitrogen; the opening and closing combination of the valve group formed by the switch valves can realize the accurate control of the low-temperature wind tunnel temperature, and the total temperature control accuracy of the wind tunnel test section is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides an ultra-low temperature ooff valve for low temperature wind-tunnel which characterized in that: the valve seat (1) is welded on the integrated valve body (2), the valve cover (5) is mounted at the upper end of the valve casing (9), the valve cover (5) is connected with the valve casing (9) through bolts to form a valve closing driving pressure cavity (17), the valve cover (5) is mounted at the lower part of the integrated valve body (2), and an inner cavity (15) is formed inside the valve cover (5);
a small piston (14) is arranged on the piston rod (4), the small piston (14) is slidably mounted in an inner cavity (15), the upper end of the piston rod (4) penetrates through the valve cover (5) and is connected with a valve clack (3), the valve clack (3) and the valve seat (1) form a sealing pair, and the lower end of the piston rod (4) penetrates through the bottom of the inner cavity (15) in a sliding manner and is connected with a large piston (8);
the lower part of the piston rod (4) is sleeved with a small corrugated pipe (7), the upper end of the small corrugated pipe (7) is welded to the lower part of a small piston (14) in a sealing mode, the lower end of the small corrugated pipe (7) is welded to the bottom of an inner cavity (15) in a sealing mode, an inner-layer pressure cavity is formed in the inner cavity (15) and located above the small piston (14), and the top of the valve cover (5) is provided with a through hole (13);
the vacuum heat insulation valve is characterized in that a large corrugated pipe (6) is sleeved on the outer side of the valve cover (5), the upper end of the large corrugated pipe (6) is hermetically welded on the valve cover (5), the lower end of the large corrugated pipe (6) is hermetically welded on a large piston (8), and the valve cover (5), the large corrugated pipe (6) and the large piston (8) are connected to form a vacuum heat insulation cavity (16) together.
2. The ultralow temperature switch valve for the low temperature wind tunnel according to claim 1, wherein a driving interface (11) is provided on the valve housing (9), and the driving interface (11) is butted with a high pressure nitrogen driving air source; the valve cover (5) is provided with a vacuum interface (12), one end of the vacuum interface (12) is communicated with the inside of the vacuum heat insulation cavity (16), and the other end of the vacuum interface (12) is butted with a vacuum tank.
3. An ultralow temperature switch valve for a low temperature wind tunnel according to claim 2, wherein the upper part of the through hole (13) is communicated with the inside of the integrated valve body (2), and the lower end of the through hole (13) is communicated with the upper part of the inner cavity (15).
4. An ultralow temperature switch valve for a low temperature wind tunnel according to claim 3, wherein the large corrugated pipe (6) and the small corrugated pipe (7) are both arranged in a sealing elastic structure.
5. An ultralow temperature switch valve for a low temperature wind tunnel according to claim 4, wherein the upper part of the valve seat (1) is in butt joint with the working end nozzle (10) through a screw thread.
6. An ultralow temperature switch valve for a low temperature wind tunnel according to claim 5, wherein the integrated valve body (2) and the low temperature wind tunnel are arranged into an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478023.3A CN113202967B (en) | 2021-04-30 | 2021-04-30 | Ultralow temperature switch valve for low temperature wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478023.3A CN113202967B (en) | 2021-04-30 | 2021-04-30 | Ultralow temperature switch valve for low temperature wind tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113202967A true CN113202967A (en) | 2021-08-03 |
| CN113202967B CN113202967B (en) | 2022-10-04 |
Family
ID=77029487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110478023.3A Active CN113202967B (en) | 2021-04-30 | 2021-04-30 | Ultralow temperature switch valve for low temperature wind tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113202967B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371943A (en) * | 2022-10-26 | 2022-11-22 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Jet bent frame device for realizing wind tunnel cooling by using liquid nitrogen medium |
| CN116222950A (en) * | 2023-05-04 | 2023-06-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Dynamic test platform for verifying reliability of low-temperature model |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB642585A (en) * | 1945-06-02 | 1950-09-06 | Lockheed Aircraft Corp | Improvements in or relating to an internal combustion turbine power plant |
| EP0624746A2 (en) * | 1993-05-11 | 1994-11-17 | Bürkert Werke GmbH & Co. | Shut-off valve |
| KR20030060511A (en) * | 2002-01-09 | 2003-07-16 | 삼성전자주식회사 | High vacuum valve having two bellows and two sealing parts |
| JP2006234085A (en) * | 2005-02-25 | 2006-09-07 | Toshihiko Takazoe | Vacuum valve |
| JP2007232018A (en) * | 2006-02-28 | 2007-09-13 | Ihara Science Corp | Valve mechanism, pressurized fluid device operation maintaining mechanism and bellows valve |
| CN101240856A (en) * | 2007-02-08 | 2008-08-13 | Smc株式会社 | Flow amount control valve |
| CN101655168A (en) * | 2009-09-09 | 2010-02-24 | 陈保春 | Self-contained pressure transmitting and reducing valve for corrugated pipe |
| CN101663525A (en) * | 2007-04-02 | 2010-03-03 | 株式会社富士金 | Valve with built-in heater |
| CN104405908A (en) * | 2014-08-30 | 2015-03-11 | 申宝光 | Valve core component of corrugated pipe type double-base sleeve valve |
| CN105090533A (en) * | 2015-09-10 | 2015-11-25 | 浙江贝尔控制阀门有限公司 | Bellows fluorine lining regulating valve |
| US20160319938A1 (en) * | 2015-04-29 | 2016-11-03 | Lam Research Corporation | Gas inlet valve with incompatible materials isolation |
| CN112178209A (en) * | 2020-09-03 | 2021-01-05 | 湖北三江航天红峰控制有限公司 | Bellows type ultra-low temperature pneumatic stop valve |
| CN112413139A (en) * | 2020-12-04 | 2021-02-26 | 沈阳罗托克调控阀门制造有限公司 | Large-caliber high-pressure hydraulic execution pressure regulating and reducing valve for wind tunnel test equipment |
-
2021
- 2021-04-30 CN CN202110478023.3A patent/CN113202967B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB642585A (en) * | 1945-06-02 | 1950-09-06 | Lockheed Aircraft Corp | Improvements in or relating to an internal combustion turbine power plant |
| EP0624746A2 (en) * | 1993-05-11 | 1994-11-17 | Bürkert Werke GmbH & Co. | Shut-off valve |
| KR20030060511A (en) * | 2002-01-09 | 2003-07-16 | 삼성전자주식회사 | High vacuum valve having two bellows and two sealing parts |
| JP2006234085A (en) * | 2005-02-25 | 2006-09-07 | Toshihiko Takazoe | Vacuum valve |
| JP2007232018A (en) * | 2006-02-28 | 2007-09-13 | Ihara Science Corp | Valve mechanism, pressurized fluid device operation maintaining mechanism and bellows valve |
| CN101240856A (en) * | 2007-02-08 | 2008-08-13 | Smc株式会社 | Flow amount control valve |
| CN101663525A (en) * | 2007-04-02 | 2010-03-03 | 株式会社富士金 | Valve with built-in heater |
| CN101655168A (en) * | 2009-09-09 | 2010-02-24 | 陈保春 | Self-contained pressure transmitting and reducing valve for corrugated pipe |
| CN104405908A (en) * | 2014-08-30 | 2015-03-11 | 申宝光 | Valve core component of corrugated pipe type double-base sleeve valve |
| US20160319938A1 (en) * | 2015-04-29 | 2016-11-03 | Lam Research Corporation | Gas inlet valve with incompatible materials isolation |
| CN105090533A (en) * | 2015-09-10 | 2015-11-25 | 浙江贝尔控制阀门有限公司 | Bellows fluorine lining regulating valve |
| CN112178209A (en) * | 2020-09-03 | 2021-01-05 | 湖北三江航天红峰控制有限公司 | Bellows type ultra-low temperature pneumatic stop valve |
| CN112413139A (en) * | 2020-12-04 | 2021-02-26 | 沈阳罗托克调控阀门制造有限公司 | Large-caliber high-pressure hydraulic execution pressure regulating and reducing valve for wind tunnel test equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371943A (en) * | 2022-10-26 | 2022-11-22 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Jet bent frame device for realizing wind tunnel cooling by using liquid nitrogen medium |
| CN116222950A (en) * | 2023-05-04 | 2023-06-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Dynamic test platform for verifying reliability of low-temperature model |
| CN116222950B (en) * | 2023-05-04 | 2023-07-14 | 中国空气动力研究与发展中心高速空气动力研究所 | Dynamic test platform for verifying reliability of low-temperature model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113202967B (en) | 2022-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113202967B (en) | Ultralow temperature switch valve for low temperature wind tunnel | |
| CN111678042B (en) | Semi-automatic switching system for gas steel cylinders | |
| CN201141443Y (en) | Large-caliber low-temperature through-flow type break valve | |
| CN111503279A (en) | High-temperature-resistant switch valve device | |
| CN210153263U (en) | Adjusting ball valve capable of linearly controlling flow | |
| CN104976404B (en) | A kind of Pneumatic low temperature regulating valve | |
| CN217029961U (en) | Small-flow ultralow-temperature regulating valve for liquid helium temperature zone | |
| CN202946714U (en) | Pneumatic diaphragm valve | |
| CN109990099A (en) | A kind of high pressure air governor bacterium valve | |
| CN213039943U (en) | Needle valve | |
| CN220771445U (en) | Hydrojet expansion valve | |
| CN113983020A (en) | Novel electro-hydraulic servo valve for promoting oil circulation | |
| CN220850772U (en) | High-temperature-resistant high-pressure-resistant butterfly valve | |
| CN206001264U (en) | Vertical LNG filling apparatus | |
| CN219493201U (en) | Three-piece type full-package inclined rod discharging valve | |
| CN218912743U (en) | Liquid nitrogen test chamber door body sealing structure | |
| CN203214890U (en) | Plug-in mounting type pneumatic coaxial valve | |
| CN220891087U (en) | Pilot type self-operated double-seat control valve capable of realizing quick opening and closing | |
| CN220227847U (en) | High-temperature wear-resistant Y-shaped stop valve special for polysilicon | |
| CN114719023B (en) | High-temperature adjusting stop valve suitable for aerospace engine | |
| CN112762197B (en) | Expansion blocking type flow adjustable pneumatic valve based on high-elasticity material | |
| CN204114164U (en) | Gas pressure regulator, governor | |
| CN218954127U (en) | Improved spring type safety valve applied to coal water slurry gasification system | |
| CN209654617U (en) | A kind of high-pressure stop valve | |
| CN218543196U (en) | Low-temperature deep-cooling angular single-seat regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |