CN113944790A - High-temperature pressure reducing valve for solid attitude control system - Google Patents
High-temperature pressure reducing valve for solid attitude control system Download PDFInfo
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- CN113944790A CN113944790A CN202110987511.7A CN202110987511A CN113944790A CN 113944790 A CN113944790 A CN 113944790A CN 202110987511 A CN202110987511 A CN 202110987511A CN 113944790 A CN113944790 A CN 113944790A
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- control system
- shell
- attitude control
- pressure
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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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/128—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like servo actuated
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a high-temperature pressure reducing valve for a solid attitude control system, which comprises: the device comprises a valve core, a shell, a spring cover, an upper hard core, a diaphragm, a lower hard core, an upper pressure plate, a lower pressure plate, an upper spring seat, a loading spring, a lower spring seat, an adjusting rod, a bushing, a pressing sleeve, an outlet plug screw, an outlet heat insulation sleeve, a low-pressure cavity heat insulation sleeve, a self-locking nut, a bolt and a damping ring. The invention solves the problem of unstable outlet pressure under the working conditions of large flow and high temperature.
Description
Technical Field
The invention belongs to the technical field of pressure reducing valves of missiles, and particularly relates to a high-temperature pressure reducing valve for a solid attitude control system.
Background
The requirements of the existing missile on the used pressure reducing valve are that the existing missile is miniaturized, the working temperature is normal temperature (-55 ℃ to +55 ℃), and the flow change in the whole flight process is small and is basically kept in a rated state. Correspondingly, on the structure of the pressure reducing valve, a rubber cloth-sandwiched flat membrane is used to meet the requirement of smaller stroke caused by the change of inlet pressure; because the requirement is miniaturized and the operating mode is stable, damping device and limit structure do not have in the relief pressure valve. The pressure reducing valve often generates vibration and whistling phenomena in the use process, the rubber cloth-sandwiched flat diaphragm is broken in the batch test process, and the reliability of the product is influenced by the defect of the performance of the whole valve.
And the flow of a pressurization system is large in the working process of the solid attitude control system, and the working temperature reaches 1000 ℃, so that the pressure reducing valve is required to ensure good dynamic stability and the outlet pressure deviation to meet the requirement under the working conditions of large flow and high temperature.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the high-temperature pressure reducing valve for the solid attitude control system is provided, and the problem of instability of outlet pressure under the working conditions of high flow and high temperature is solved.
The purpose of the invention is realized by the following technical scheme: a high temperature pressure relief valve for a solid attitude control system, comprising: the device comprises a valve core, a shell, a spring cover, an upper hard core, a diaphragm, a lower hard core, an upper pressure plate, a lower pressure plate, an upper spring seat, a loading spring, a lower spring seat, an adjusting rod, a bushing, a pressing sleeve, an outlet plug screw, an outlet heat insulation sleeve, a low-pressure cavity heat insulation sleeve, a self-locking nut, a bolt and a damping ring; the outlet heat insulation sleeve is embedded into the left outlet of the shell and is compressed and fixed through an outlet screw plug; the low-pressure cavity heat insulation sleeve is arranged in a low-pressure cavity at the lower part of the shell, the upper pressure plate is connected with the low-pressure cavity heat insulation sleeve, and the upper pressure plate is positioned at the lower part of the low-pressure cavity heat insulation sleeve; the valve core is assembled with a damping ring and a compression gasket and then fixed on the valve core by a compression sleeve; the upper hard core is assembled with the diaphragm and then is tightly pressed by the lower hard core; the valve core penetrates through the shell, and the spherical surface part of the middle section of the valve core is in contact with the small conical surface of the valve seat of the shell for limiting; in a low-pressure cavity at the lower part of the shell, a boss at the top of the upper hard core penetrates into a groove at the lower end of the valve core to form a hook type connecting structure, and the valve core can be driven to move under the action of force balance after the diaphragm senses the pressure of an outlet; the bushing is connected with the upper end of the shell through threads; the spherical surface of the upper end of the upper spring seat is matched with the conical surface of the lower end of the upper hard core; the upper end of the loading spring is matched with the upper spring seat, the lower end of the loading spring is matched with the lower spring seat, and the loading spring is arranged between the diaphragm and the adjusting rod to provide spring force; in a low-pressure cavity at the lower part of the shell, a lower pressure plate presses the diaphragm, the spring cover is sleeved on the outer surface of the loading spring, and the spring cover, the diaphragm, the upper pressure plate and the lower pressure plate are all connected with the shell through self-locking nuts and bolts; the adjusting rod is arranged at the lower end of the interior of the spring cover and used for adjusting the pressure of the outlet.
Above-mentioned in being used for solid attitude control system's high temperature relief pressure valve, still include: compressing the gasket; the pressing gasket is arranged at the connecting position of the pressing sleeve and the valve core.
Above-mentioned in being used for solid attitude control system's high temperature relief pressure valve, still include: a gasket A; wherein, the sealing gasket A is arranged at the connecting position of the bushing and the shell.
Above-mentioned in being used for solid attitude control system's high temperature relief pressure valve, still include: a gasket B; the sealing gasket A is arranged at the connecting position of the low-pressure cavity heat insulation sleeve and the upper pressure plate.
Above-mentioned in being used for solid attitude control system's high temperature relief pressure valve, still include: locking the nut; wherein, lock nut with the bottom of spring housing is connected.
Above-mentioned in being used for solid attitude control system's high temperature relief pressure valve, still include: a flat gasket; the flat gasket is sleeved on the outer surface of the bolt; the flat gasket is positioned between the self-locking nut and the compression gasket.
In the high-temperature pressure reducing valve for the solid attitude control system, the outlet plug screw is connected with the left outlet of the shell, and the outlet plug screw is in compression joint with the outlet heat insulation sleeve.
In the high-temperature pressure reducing valve for the solid attitude control system, the bushing and the shell form a sealed high-pressure cavity, and the bushing provides guidance and limit for the valve core.
In the high-temperature pressure reducing valve for the solid attitude control system, the stroke h2 of the valve core is 1.2 mm-1.3 mm.
In the high-temperature pressure reducing valve for the solid attitude control system, the pre-deflection h1 of the membrane adjusted by the sealing gasket B is 0.25-0.35 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention solves the problem of unstable outlet pressure under the working conditions of large flow and high temperature;
(2) the invention realizes the effect of large stroke of the sensitive element by the corrugated structure design of the diaphragm;
(3) the effect of strong impact resistance is realized through the design of the limiting structure;
(4) according to the invention, the hook type linkage structure is adopted among the sensitive elements, so that the problem that the return force cannot be provided due to the high-temperature failure of the auxiliary spring material is solved, and the effects that the return spring is not arranged and the valve core normally returns are achieved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a high-temperature pressure reducing valve for a solid attitude control system according to an embodiment of the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a high-temperature pressure reducing valve for a solid attitude control system according to an embodiment of the present invention. As shown in fig. 1, the high temperature pressure reducing valve for a solid attitude control system includes: the valve core comprises a valve core 1, a shell 3, a spring cover 4, an upper hard core 5, a diaphragm 6, a lower hard core 7, an upper pressure plate 8, a lower pressure plate 9, a spring upper seat 10, a loading spring 11, a spring lower seat 12, an adjusting rod 13, a bushing 14, a pressing sleeve 15, an outlet screw plug 16, an outlet heat insulation sleeve 17, a low-pressure cavity heat insulation sleeve 18, a bolt heat insulation plate 19, a fastening heat insulation sleeve 20, a self-locking nut 27, a bolt 28 and a damping ring 29; wherein the content of the first and second substances,
the outlet heat insulation sleeve 17 is embedded into the left outlet of the shell 3 and is compressed and fixed through an outlet screw plug 16, the outlet screw plug 16 is connected with the left outlet of the shell 3, and the outlet screw plug 16 is in compression joint with the outlet heat insulation sleeve 17; a low-pressure cavity heat insulation sleeve 18 is arranged in a low-pressure cavity at the lower part of the shell 3, an upper pressure plate 8 is connected with the low-pressure cavity heat insulation sleeve 18, and the upper pressure plate 8 is positioned at the lower part of the low-pressure cavity heat insulation sleeve 18; the valve core 1 is fixed on the valve core 1 by a pressing sleeve 15 after being assembled with a damping ring 29 and a pressing gasket 21; the upper hard core 5 is assembled with a diaphragm 6 and then is compressed by the lower hard core 7; the assembled valve core 1 penetrates through the shell 3 from top to bottom, the spherical part of the middle section of the valve core 1 is in contact with the small conical surface of the valve seat of the shell 3 for limiting, and the opening H at the position can be automatically adjusted in the working process; in a low-pressure cavity at the lower part of the shell 3, a boss at the top of the assembled upper hard core 5 penetrates into a groove at the lower end of the valve core 1 to form a hook type connecting structure, and the diaphragm 6 can drive the valve core to move under the action of force balance after sensing outlet pressure; the bushing 14 is connected with the upper end of the shell 3 through threads, the bushing 14 and the shell 3 form a sealed high-pressure cavity, and the bushing 14 provides guidance and limit for the valve core 1; the spherical surface of the upper end of the upper spring seat 10 is matched with the conical surface of the lower end of the upper hard core 5; the upper end of a loading spring 11 is matched with an upper spring seat 10, the lower end of the loading spring 11 is matched with a lower spring seat 12, and the loading spring 11 is arranged between a diaphragm 6 and an adjusting rod 13 to provide spring force; in a low-pressure cavity at the lower part of the shell 3, the lower pressing plate 9 presses the diaphragm 6, the spring cover 4 is sleeved on the outer surface of the loading spring 11, and the spring cover 4, the diaphragm 6, the upper pressing plate 8 and the lower pressing plate 9 are all connected with the shell 3 through self-locking nuts 27 and bolts 28; an adjusting rod 13 is mounted to the inner lower end of the spring housing 4 for adjusting the outlet pressure.
As shown in fig. 1, the high-temperature pressure reducing valve for a solid attitude control system further includes: a pressing pad 21; wherein, the pressing gasket 21 is arranged at the connecting position of the pressing sleeve 15 and the valve core 1.
As shown in fig. 1, the high-temperature pressure reducing valve for a solid attitude control system further includes: a gasket a 22; wherein the gasket a22 is provided at the connection position of the liner 14 and the housing 3.
As shown in fig. 1, the high-temperature pressure reducing valve for a solid attitude control system further includes: a gasket B23; wherein, the sealing gasket A22 is arranged at the connecting position of the low-pressure cavity heat insulation sleeve 18 and the upper press plate 8.
As shown in fig. 1, the high-temperature pressure reducing valve for a solid attitude control system further includes: a lock nut 24; wherein the locking nut 24 is connected with the bottom of the spring housing 4.
As shown in fig. 1, the high-temperature pressure reducing valve for a solid attitude control system further includes: a flat gasket 26; wherein, the flat gasket 26 is sleeved on the outer surface of the bolt 28; the flat washer 26 is located between the self-locking nut 27 and the compression washer 21.
When the solid attitude control system works, high-temperature fuel gas conveyed from the upstream enters an inlet and a high-pressure cavity of the pressure reducing valve, is throttled by a gap (called as valve core opening) between the valve core and a shell valve seat and then enters a low-pressure cavity, gas in the low-pressure cavity flows to a downstream pipeline through an outlet, and meanwhile, the gas in the low-pressure cavity directly acts on the diaphragm. The balance of the forces consisting of the main spring force, the air pressure acting on the diaphragm and the valve core and the like ensures that the pressure deviation of the outlet of the pressure reducing valve is within a specified range. If the outlet pressure is higher than the allowable working pressure range for some reason, the air pressure on the diaphragm is increased, the main spring is compressed, the valve core moves upwards under the action of the air pressure, the opening degree of the valve core is reduced, the pressure of the low-pressure cavity is reduced, and the valve core returns to the allowable working pressure range. Conversely, when the outlet pressure is lower than the allowable operating pressure range, the above operation is reversed. After the rated point of the outlet is assembled and adjusted, the main spring jacks up the valve core to enable the valve core to be in a fully-opened state, and the opening degree of the valve core reaches the maximum. When the valve works, an upstream air source is opened, high-pressure air is introduced into an inlet of the pressure reducing valve, the membrane of the pressure reducing valve is loaded by the air pressure, the opening degree of the valve core is reduced, and finally the working state is achieved.
As shown in fig. 1 and 2, the assembly requires that the stroke h2 of the valve core 1 is 1.2-1.3 mm; adjusting the pre-bias h1 of the membrane 6 to be 0.25-0.35 mm (downwards) by matching a sealing gasket B23; the maximum static friction force between the damping ring 29 and the shell 3 is adjusted to be 5.5-6 kg by adjusting the screwing torque between the pressing sleeve 15 and the valve core 1.
The pressure reducing valve of the embodiment considers that the requirement on the accuracy of the outlet pressure is high, and adopts a direct-acting unloading reverse scheme. On the internal structure:
(1) the sensitive element is a metal corrugated membrane. The deformation of the sensing element is large due to the large flow of the pressure reducing valve, and meanwhile, the effective area of the sensing element is limited when the main spring is designed. The areas providing the sealing function and the deformation function are respectively subjected to structure optimization design, and the corrugated structure is adopted in the central area with larger deformation to meet the requirement of the large stroke of the pressure reducing valve.
(2) The damping element is a graphite damping ring. Compared with the limitation of the use temperature of the conventional rubber damping element and the instability of the damping force after repeated friction, on one hand, the graphite damping ring arranged on the valve core is matched with the shell to realize friction damping, after the valve core works for many times, the matching state of the graphite damping ring and the shell cannot be changed, and the friction damping force is stable; and the upper limit of the working temperature reaches 1000 ℃.
(3) And a limiting structure is reasonably arranged. On the one hand, the state and the consistency of the product are ensured through the structural size of the product, and simultaneously, because the working condition is greatly changed, under the condition of ensuring the performance of the product, the energy is quickly attenuated to the vibration and the chirping which are possibly generated, and the product quickly reaches dynamic balance.
(4) And (4) heat insulation design. According to the structure of the pressure reducer, the parts sensitive to high temperature are the main spring and the diaphragm (the auxiliary spring is cancelled). The high-silica heat insulation structure is arranged at the main part of heat conduction, so that the temperature of the main spring and the diaphragm can be effectively reduced. To prevent the heating effect of the gas flow, a heat-insulating lining is arranged in the outlet gas flow channel, and to prevent the heat from being conducted through the shell, a heat-insulating lining is arranged between the shell and the membrane.
The invention realizes the effect of large stroke of the sensitive element by the corrugated structure design of the diaphragm. The effect of strong impact resistance is realized through the design of the limiting structure; the friction damping of a motion system in the valve is determined through the simulation analysis of the dynamic stability of the whole valve and the simulation analysis of the fluid-solid coupling of the system, so that the effect of the dynamic stability of the whole valve is achieved; according to the invention, the hook type linkage structure is adopted among the sensitive elements, so that the problem that the return force cannot be provided due to the high-temperature failure of the auxiliary spring material is solved, and the effects that the return spring is not arranged and the valve core normally returns are achieved; according to the invention, the high silica heat insulation structure is designed for the high-temperature sensitive part, so that the problems that the mechanical property of the material is reduced under a high-temperature condition to influence the use safety and the rated point drift are solved, the heat insulation efficiency reaches 73%, the normal-temperature outlet pressure characteristic of the product is completely consistent with that of the product at the working temperature, and the test coverage of the normal temperature on the working temperature is realized.
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. A high temperature relief valve for solid attitude control system, its characterized in that includes: the device comprises a valve core (1), a shell (3), a spring cover (4), an upper hard core (5), a diaphragm (6), a lower hard core (7), an upper pressure plate (8), a lower pressure plate (9), an upper spring seat (10), a loading spring (11), a lower spring seat (12), an adjusting rod (13), a bushing (14), a pressing sleeve (15), an outlet plug screw (16), an outlet heat-insulating sleeve (17), a low-pressure cavity heat-insulating sleeve (18), a self-locking nut (27), a bolt (28) and a damping ring (29); wherein the content of the first and second substances,
the outlet heat insulation sleeve (17) is embedded into the left outlet of the shell (3) and is pressed and fixed through an outlet screw plug (16);
the low-pressure cavity heat insulation sleeve (18) is arranged in a low-pressure cavity at the lower part of the shell (3), the upper pressing plate (8) is connected with the low-pressure cavity heat insulation sleeve (18), and the upper pressing plate (8) is positioned at the lower part of the low-pressure cavity heat insulation sleeve (18);
the valve core (1) is assembled with a damping ring (29) and a compression gasket (21) and then fixed on the valve core (1) by a pressing sleeve (15); the upper hard core (5) is assembled with the diaphragm (6) and then is compressed by the lower hard core (7);
the valve core (1) penetrates through the shell (3), and the middle spherical surface part of the valve core (1) is in contact with the small conical surface of the valve seat of the shell (3) for limiting;
a boss at the top of the upper hard core (5) penetrates into a groove at the lower end of the valve core (1) to form a hook type connecting structure;
the bushing (14) is connected with the upper end of the shell (3) through threads;
the upper end spherical surface of the upper spring seat (10) is matched with the lower end conical surface of the upper hard core (5);
the upper end of the loading spring (11) is matched with the upper spring seat (10), the lower end of the loading spring (11) is matched with the lower spring seat (12), and the loading spring (11) is arranged between the diaphragm (6) and the adjusting rod (13) to provide spring force;
the lower pressure plate (9) presses the diaphragm (6), the spring cover (4) is sleeved on the outer surface of the loading spring (11), and the spring cover (4), the diaphragm (6), the upper pressure plate (8) and the lower pressure plate (9) are connected with the shell (3) through self-locking nuts (27) and bolts (28);
the adjusting rod (13) is arranged at the lower end of the interior of the spring cover (4) and used for adjusting outlet pressure.
2. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, further comprising: a pressing pad (21); the pressing gasket (21) is arranged at the connecting position of the pressing sleeve (15) and the valve core (1).
3. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, further comprising: a gasket A (22); wherein the sealing gasket A (22) is arranged at the connecting position of the lining (14) and the shell (3).
4. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, further comprising: a gasket B (23); the sealing gasket A (22) is arranged at the connecting position of the low-pressure cavity heat insulation sleeve (18) and the upper pressure plate (8).
5. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, further comprising: a lock nut (24); wherein the locking nut (24) is connected with the bottom of the spring cover (4).
6. The high temperature pressure reducing valve for a solid attitude control system according to claim 2, further comprising: a flat gasket (26); wherein the flat gasket (26) is sleeved on the outer surface of the bolt (28); the flat gasket (26) is positioned between the self-locking nut (27) and the compression gasket (21).
7. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, characterized in that: the outlet screw plug (16) is connected with the left outlet of the shell (3), and the outlet screw plug (16) is in pressure joint with the outlet heat insulation sleeve (17).
8. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, characterized in that: the bushing (14) and the shell (3) form a sealed high-pressure cavity, and the bushing (14) provides guidance and limit for the valve core (1).
9. The high temperature pressure reducing valve for a solid attitude control system according to claim 1, characterized in that: the stroke h2 of the valve core (1) is 1.2 mm-1.3 mm.
10. The high temperature pressure reducing valve for a solid attitude control system according to claim 9, wherein: the sealing gasket B (23) adjusts the pre-deflection h1 of the membrane (6) to be 0.25-0.35 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987511.7A CN113944790B (en) | 2021-08-26 | 2021-08-26 | High-temperature pressure reducing valve for solid attitude control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110987511.7A CN113944790B (en) | 2021-08-26 | 2021-08-26 | High-temperature pressure reducing valve for solid attitude control system |
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| Publication Number | Publication Date |
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| CN113944790A true CN113944790A (en) | 2022-01-18 |
| CN113944790B CN113944790B (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110987511.7A Active CN113944790B (en) | 2021-08-26 | 2021-08-26 | High-temperature pressure reducing valve for solid attitude control system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446363A (en) * | 2008-12-29 | 2009-06-03 | 北京航天万源煤化工工程技术有限公司 | Metallic film type reducing valve |
| CN101749465A (en) * | 2008-12-02 | 2010-06-23 | 上海宇航***工程研究所 | Double-valve seat pressure-reducing valve |
| US20130008531A1 (en) * | 2009-12-22 | 2013-01-10 | Spirax Marshall Pvt., Ltd. | Pressure Reducing Valves with Multiple Heads and Seats |
| CN105673900A (en) * | 2016-02-23 | 2016-06-15 | 上海井和海船用阀门有限公司 | Air reducing valve used for ships |
| JP2017182718A (en) * | 2016-03-31 | 2017-10-05 | 大阪瓦斯株式会社 | Pressure adjust device |
| CN110131477A (en) * | 2019-05-29 | 2019-08-16 | 河南航天液压气动技术有限公司 | A kind of multi-level throttle labyrinth decompression valve |
-
2021
- 2021-08-26 CN CN202110987511.7A patent/CN113944790B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749465A (en) * | 2008-12-02 | 2010-06-23 | 上海宇航***工程研究所 | Double-valve seat pressure-reducing valve |
| CN101446363A (en) * | 2008-12-29 | 2009-06-03 | 北京航天万源煤化工工程技术有限公司 | Metallic film type reducing valve |
| US20130008531A1 (en) * | 2009-12-22 | 2013-01-10 | Spirax Marshall Pvt., Ltd. | Pressure Reducing Valves with Multiple Heads and Seats |
| CN105673900A (en) * | 2016-02-23 | 2016-06-15 | 上海井和海船用阀门有限公司 | Air reducing valve used for ships |
| JP2017182718A (en) * | 2016-03-31 | 2017-10-05 | 大阪瓦斯株式会社 | Pressure adjust device |
| CN110131477A (en) * | 2019-05-29 | 2019-08-16 | 河南航天液压气动技术有限公司 | A kind of multi-level throttle labyrinth decompression valve |
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| Publication number | Publication date |
|---|---|
| CN113944790B (en) | 2023-06-06 |
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