CN115992861B - A nitrogen spring loaded pressure reducing valve and its preset regulating device - Google Patents
A nitrogen spring loaded pressure reducing valve and its preset regulating device Download PDFInfo
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- CN115992861B CN115992861B CN202310218552.9A CN202310218552A CN115992861B CN 115992861 B CN115992861 B CN 115992861B CN 202310218552 A CN202310218552 A CN 202310218552A CN 115992861 B CN115992861 B CN 115992861B
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Abstract
The invention relates to a nitrogen spring loading force type pressure reducing valve and a preset adjusting device thereof, wherein a valve core comprises an upper core, a connecting gasket, a corrugated pipe, a lower core, a guide sleeve and a valve rod, wherein a threaded inflation channel is arranged at the top of the upper core, the connecting gasket is arranged on the inner circumference of the bottom of the upper core, the first end of the corrugated pipe is fixed at the bottom of the upper core and the bottom of the connecting gasket, the top circumference of the lower core is connected with the second end of the corrugated pipe, an air chamber is formed among the upper core, the corrugated pipe and the lower core, the middle part of the lower core is provided with the guide sleeve, a sliding elastic structure movably connected with the threaded inflation channel is arranged in the guide sleeve, an air channel communicated with the threaded inflation channel is arranged at the lower part of the guide sleeve so as to charge nitrogen into the air chamber, and the valve rod is arranged at the bottom of the lower core and a lifting valve core is arranged at the bottom of the valve rod. And the output end of the inflation control structure is connected with the threaded inflation channel, the upper part of the upper base is provided with the inflation control structure, a spherical accommodating cavity is arranged between the upper base and the lower base and is used for accommodating the valve core, and the spherical pressure reducing valve environment is completely simulated.
Description
Technical Field
The invention relates to the technical field of nitrogen pressure regulating valves, in particular to a nitrogen spring loading force type pressure reducing valve and a preset regulating device thereof.
Background
The nitrogen spring is an elastic component taking high-pressure nitrogen as a working medium, the high-pressure nitrogen is sealed in a determined container, the nitrogen is compressed by an external force through a plunger rod, and when the external force is removed, the nitrogen is expanded by the high-pressure nitrogen to obtain a certain elastic pressure. The existing nitrogen springs in the current market are inconvenient to set and calibrate the internal gas pressure when in use, and the internal pressure of the nitrogen springs is inconvenient to increase or decrease and inconvenient to adjust, so that the nitrogen springs still have certain defects in actual use.
Disclosure of Invention
The invention aims to provide a nitrogen spring loading force type pressure reducing valve and a preset adjusting device thereof, which can preset and adjust the inflation and deflation of a nitrogen spring in the valve and calibrate the pressure regulating valve.
The nitrogen spring-loaded pressure reducing valve comprises a valve core and a valve body, wherein the valve core is arranged in the valve body, the valve core comprises an upper core, a connecting gasket, a corrugated pipe, a lower core and a lifting valve core, the top of the upper core is provided with a threaded inflation channel integrally formed with the valve core, the connecting gasket is arranged on the inner circumference of the bottom of the upper core and is positioned on the same horizontal plane with the end of the upper core, the first end of the corrugated pipe is fixed on the bottom of the upper core and the bottom of the connecting gasket, the top of the lower core is circumferentially connected with the second end of the corrugated pipe, an air chamber is formed among the upper core, the corrugated pipe and the lower core, a guide sleeve is arranged in the middle of the lower core, a sliding elastic structure movably connected with the threaded inflation channel is arranged in the guide sleeve, an air channel communicated with the threaded inflation channel is arranged on the lower portion of the guide sleeve, nitrogen is inflated into the air chamber, and the valve rod is arranged on the bottom of the lower core.
The valve core further comprises a conical jackscrew, the conical jackscrew is arranged in the threaded inflation channel, the conical end at the bottom of the conical jackscrew is correspondingly arranged with the air outlet of the threaded inflation channel, and an air flow channel communicated with the threaded inflation channel is arranged in the conical jackscrew.
The valve core further comprises an air duct, a first end of the air duct is connected to the outside of the threaded inflation channel in a threaded mode, a second end of the air duct is located at the center of the lower core, and an installation space is reserved between the air duct and the guide sleeve.
The sliding elastic structure comprises an annular sliding rail, a sliding ring and a first spring, wherein the annular sliding rail is annularly arranged at the upper part of the installation space, the sliding ring is embedded in the annular sliding rail, one side of the sliding ring is in contact with the outer wall of the air duct and slides up and down along the outer wall of the air duct, the first spring is arranged in the installation space below the annular sliding rail, the first end of the first spring is connected with the bottom of the annular sliding rail, and the second end of the first spring is connected with the air duct.
Further, a first limit groove is formed in the inner side of the top of the guide sleeve, a second limit groove is formed in the outer side of the top of the air duct, and the stroke of the annular sliding rail is limited through the first limit groove and the second limit groove.
Further, a rotation stopping boss is arranged on the outer side of the bottom of the upper core.
The preset adjusting device of the nitrogen spring loading force type pressure reducing valve is used for adjusting and calibrating the valve core of the nitrogen spring loading force type pressure reducing valve and comprises an inflation control structure, a base and a spherical accommodating cavity, wherein the output end of the inflation control structure is connected with the threaded inflation channel of the valve core, a first NPT interface is arranged on the inflation control structure and is an air inlet, the base comprises a lower base and an upper base, the upper portion of the upper base is provided with the inflation control structure, the upper base is arranged at the top of the lower base, the spherical accommodating cavity is arranged between the upper base and the lower base and is used for accommodating the valve core, and the spherical accommodating cavity is used for completely simulating the environment of the spherical pressure reducing valve.
The cross section of the lower base is of a convex structure, an arc-shaped lower groove is formed in the top of the lower base, a second NPT interface communicated with the arc-shaped lower groove is arranged at the bottom of the lower base, the second NPT interface is a pressure reducing valve working pressure air inlet and outlet interface, a connecting boss is arranged at the top of the upper base, a two-stage groove is formed in the bottom of the upper base, a first-stage groove is an arc-shaped upper groove and is correspondingly arranged with the arc-shaped lower groove, the arc-shaped upper groove and the arc-shaped lower groove form the spherical accommodating cavity, and a second-stage groove is a step-shaped groove and is used for being matched with the top of the lower base.
Further, a third NPT interface communicated with the first-stage groove is arranged on the side portion of the upper base, the third NPT interface is an adjustable-pressure air outlet interface, and an upper connecting channel communicated with the first-stage groove is arranged on the top of the boss of the upper base.
The air inflation control structure comprises an air inflation lower cover, an air inflation upper cover, an air inflation elastic needle and a second spring, wherein a connecting protrusion is arranged in the middle of the bottom of the air inflation lower cover and is arranged in an upper connecting channel of the upper base, a control channel is arranged in the air inflation lower cover, a first NPT interface is arranged on the side part of the air inflation lower cover and is communicated with the control channel, the air inflation upper cover is arranged at the top of the air inflation lower cover, the air inflation elastic needle is arranged in the control channel, the top of the air inflation elastic needle is positioned at the upper part of the control channel, the second spring is arranged in the control channel at the upper part, the bottom of the second spring is connected with the top of the air inflation elastic needle, and the bottom of the air inflation elastic needle penetrates through the control channel and then stretches into the threaded air inflation channel to be matched with a hexagonal groove at the top of a conical jackscrew so as to control the action of the conical jackscrew.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention has simple operation, can be automatically operated by site operators through the operation instruction, and has high charging and discharging efficiency, safety and stability.
2. According to the invention, the internal environment of the pressure reducing valve is completely simulated, the same cavity and the same runner environment are adopted, so that the pressure can be regulated on line, the preset pressure regulation and calibration are accurate, and the nitrogen spring is implanted into the pressure reducing valve after being preset in the device, so that the production efficiency and the success rate are effectively improved.
Drawings
FIG. 1 is a schematic diagram of a valve core structure of a nitrogen spring-loaded pressure relief valve in an embodiment of the invention;
FIG. 2 is a schematic diagram of a preset regulator of a nitrogen spring-loaded pressure relief valve in an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of a spherical receiving chamber of a preset adjustment device in accordance with an embodiment of the present invention;
Reference numerals:
The valve comprises a valve core, a 2-upper core, a 3-threaded inflation channel, a 4-connecting gasket, a 5-corrugated pipe, a 6-lower core, a 7-air chamber, an 8-guide sleeve, a 9-valve rod, a 10-lifting valve core, an 11-conical jackscrew, a 12-air duct, a 13-annular sliding rail, a 14-sliding ring, a 15-first spring, a 16-elastic retainer ring, a 17-first limit groove, a 18-second limit groove, a 19-positioning clamping spring, a 20-rotation stopping boss, a 21-first NPT interface, a 22-lower base, a 23-upper base, a 24-spherical accommodating cavity, a 25-second NPT interface, a 26-third NPT interface, a 27-sealing plug, a 28-inflation lower cover, a 29-inflation upper cover, a 30-inflation spring pin, a 31-second spring and a 32-sealing gasket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In order to solve the problems of air charging and air discharging of a nitrogen spring in a valve and pressure regulating and calibrating of a pressure reducing valve when the nitrogen spring loading type pressure regulating valve is preset, the invention provides a nitrogen spring loading type pressure reducing valve and a preset regulating device thereof, wherein a valve core of the nitrogen spring loading type pressure reducing valve comprises an upper core, a threaded air charging channel is arranged at the top of the upper core; the device comprises an upper core, a connecting gasket, a corrugated pipe, a lower core, a valve rod and a lifting valve core, wherein the upper core is arranged on the upper core, the lower core is arranged on the lower core, the first end of the corrugated pipe is fixed at the bottom of the upper core and the bottom of the connecting gasket, the top circumference of the lower core is connected with the second end of the corrugated pipe, an air chamber is formed among the upper core, the corrugated pipe and the lower core, a guide sleeve is arranged in the middle of the lower core, a sliding elastic structure movably connected with a threaded inflation channel is arranged in the guide sleeve, an air channel communicated with the threaded inflation channel is arranged at the lower part of the guide sleeve so as to charge nitrogen into the air chamber, and the valve rod is arranged at the bottom of the lower core and is provided with the lifting valve core at the bottom of the valve rod. And the output end of the inflation control structure is connected with the threaded inflation channel, the upper part of the upper base is provided with the inflation control structure, a spherical accommodating cavity is arranged between the upper base and the lower base and is used for accommodating the valve core, and the spherical pressure reducing valve environment is completely simulated. The invention can perform preset adjustment on the inflation and deflation of the nitrogen spring in the valve, and perform pressure adjustment and calibration on the pressure regulating valve.
In one embodiment of the present invention, a nitrogen spring-loaded force relief valve is provided. In this embodiment, the pressure reducing valve includes a valve core 1 and a valve body, the valve core 1 is disposed in the valve body, and both are spherical mechanisms. As shown in fig. 1, the valve element 1 includes:
The upper core 2 adopts a hemispherical structure, the top of the upper core is provided with a threaded inflation channel 3 which is integrally formed with the upper core, the threaded inflation channel 3 downwards extends to form an extension part, and the end part of the extension part and the end part of the upper core 2 are positioned in the same horizontal plane;
a connection pad 4 disposed in the bottom inner circumferential direction of the upper core 2 and positioned at the same level as the end of the upper core 2;
a bellows 5 having a first end fixed to the bottoms of the upper core 2 and the connection pad 4;
The middle part of the lower core 6 is provided with a guide sleeve 8, a sliding elastic structure movably connected with the thread inflation channel 3 is arranged in the guide sleeve 8, and a gas path communicated with the thread inflation channel 3 is arranged at the lower part of the guide sleeve 8 so as to charge nitrogen into the air chamber 7;
A valve rod 9 is arranged at the bottom of the lower core 6, and a lifting valve core 10 is arranged at the bottom of the valve rod 9.
When the valve is used, the corrugated pipe 5 is used for replacing the traditional valve body diaphragm to conduct gas sensing, the threaded inflation channel 3 is used for charging nitrogen into the air chamber 7, the corrugated pipe 5 and the sliding elastic structure jointly drive the lower core 6 to move downwards so as to drive the valve rod 9 and the lifting valve core 10 to move downwards, the air channel at the lower part of the guide sleeve 8 is used for transmitting the nitrogen in the air chamber 7 into the threaded inflation channel 3 during air discharging, the nitrogen in the air chamber 7 is discharged, and at the moment, the corrugated pipe 5 and the sliding elastic structure jointly drive the lower core 7 to move upwards so as to drive the valve rod 9 and the lifting valve core 10 to move upwards. By lifting the valve core 10 up and down, the size of the air inlet gap between the valve core and the valve body is changed, and the air outlet pressure is regulated.
In one possible embodiment, the valve cartridge 1 of the present invention further comprises a tapered jackscrew 11. The conical jackscrew 11 is arranged in the thread inflation channel 3, the conical end at the bottom of the conical jackscrew is correspondingly arranged with the air outlet of the thread inflation channel 3, and the outer surface of the conical jackscrew 11 is provided with external threads matched with the thread inflation channel 3.
Wherein, the top of the conical jackscrew 11 is provided with a hexagonal groove for adjustment, and a gas flow passage is arranged in the conical jackscrew 11 and is communicated with the thread inflation channel 3.
In one possible embodiment, the valve cartridge 1 of the present invention further comprises an air duct 12. The first end threaded connection of air duct 12 is in the outside of screw thread inflation passageway 3, and the second end of air duct 12 is located the central point of lower core 6 and puts, and when not inflating, the second end of air duct 12 and the central point of lower core 6 contact and constitute the closed condition, and when inflating, the second end of air duct 12 is kept away from lower core 6, exports the nitrogen gas of filling. And an installation space is arranged between the air duct 12 and the guide sleeve 8.
In one possible embodiment, the sliding elastic structure comprises an annular slide rail 13, a slide ring 14 and a first spring 15. The annular slide rail 13 is annularly arranged at the upper part of the installation space between the guide sleeve 8 and the air duct 12, the sliding ring 14 is embedded in the annular slide rail 13, one side of the sliding ring is contacted with the outer wall of the air duct 12, and the sliding ring slides up and down along the outer wall of the air duct 12. A first spring 15 is arranged in the installation space below the annular slide rail 13, a first end of the first spring 15 is connected with the bottom of the annular slide rail 13, and a second end of the first spring 15 is connected with the air duct 12. In use, when the sliding ring 14 moves downwards, the first spring 15 is compressed, the air duct 12 is far away from the lower core 6, and the lower core 6 moves downwards, otherwise, the self elastic force of the first spring 15 pushes the sliding ring 14 to move upwards.
Optionally, a circlip 16 is provided on top of the guide sleeve 8 for defining the position of the annular slide rail 13, avoiding slipping of the runner 14.
Optionally, a first limit groove 17 is arranged on the inner side of the top of the guide sleeve 8, a second limit groove 18 is arranged on the outer side of the top of the air duct 12, and the stroke of the annular slide rail 13 is limited by the first limit groove 17 and the second limit groove 18 and corresponds to the telescopic stroke of the corrugated pipe 5.
In an alternative embodiment, the valve cartridge of the present invention further comprises a detent spring 19. The top of valve rod 9 is connected at the bottom of lower core 6 through location jump ring 19. Specifically, an annular mounting groove is formed in the bottom of the lower core 6, so that the positioning clamp spring 19 can be conveniently mounted, the top of the valve rod 9 is of an approximately T-shaped structure, the head of the T-shaped structure is used for mounting the positioning clamp spring 19, and the valve rod 9 is mounted at the bottom of the lower core 6 through the positioning clamp spring 19.
In an alternative embodiment, a rotation stopping boss 20 is further provided on the bottom outside of the upper core 2. In this embodiment, preferably, the rotation stopping bosses 20 are provided in two, symmetrically provided at both sides of the upper core 2. When the valve core is used, the stability of the valve core is effectively improved through the rotation stopping boss 20.
In summary, when the valve core is used, the external force is used to loosen the conical jackscrew 11, the threaded inflation channel 3 is opened, nitrogen enters the air duct 12 through the threaded inflation channel 3, the air duct 12 is far away from the lower core 6 by the pressure of the nitrogen gas, the nitrogen gas sequentially enters the air chamber 7 through the installation space and the air passage on the guide sleeve 8, and the air chamber 7 is filled with the nitrogen gas so as to drive the valve rod 9 and the lifting valve core 10 to perform pressure regulation.
In one embodiment of the present invention, a preset adjustment device for a nitrogen spring-loaded pressure relief valve is provided. In this embodiment, the preset adjusting device completely simulates the internal environment of the pressure reducing valve, adopts the same cavity and the same flow channel environment to perform on-line pressure adjustment on the valve core 1 of the nitrogen spring loading force type pressure reducing valve in the above embodiment, and implants the valve core 1 into the pressure reducing valve after the preset pressure adjustment and calibration are accurate. Specifically, as shown in fig. 2 and 3, the preset adjusting device includes:
The output end of the inflation control structure is connected with the threaded inflation channel 3 of the upper core 2 of the valve core 1 so as to control the nitrogen to be conveyed into the threaded inflation channel 3, and a first NPT interface 21 is arranged on the inflation control structure, and the first NPT interface 21 is an air inlet;
The base is arranged at the lower part of the inflation control structure and comprises a lower base 22 and an upper base 23, the upper part of the upper base 23 is provided with the inflation control structure, the upper base 23 is arranged at the top of the lower base 22, a spherical accommodating cavity 24 is arranged between the upper base and the lower base, the spherical accommodating cavity 24 is used for accommodating the valve core 1, and the spherical accommodating cavity 24 completely simulates the environment of the spherical pressure reducing valve.
In a possible embodiment, the cross section of the lower base 22 adopts a convex structure, an arc-shaped lower groove is arranged at the top of the lower base 22, a second NPT interface 25 communicated with the arc-shaped lower groove is arranged at the bottom, and the second NPT interface 25 is a pressure reducing valve working pressure air inlet and outlet interface. When the pressure-regulating and calibrating device is used, after the gas of the nitrogen spring valve core is preset, the gas with the set working pressure is input through the second NPT interface 25 so as to simulate the pressure-regulating and calibrating process of the pressure-regulating valve.
Optionally, a pressure tester is disposed at the first NPT interface 21, so as to detect the gas pressure in the valve core 1, and then cooperate with the second NPT interface 25 to regulate the pressure of the pressure reducing valve.
In one possible embodiment, the top of the upper base 23 is provided with a connecting boss, the bottom is provided with a two-stage groove, the first-stage groove is an arc-shaped upper groove and is correspondingly arranged with an arc-shaped lower groove on the lower base 22, the arc-shaped upper groove and the arc-shaped lower groove form a spherical accommodating cavity 24, the second-stage groove is a step-shaped groove and is used for being matched with the top of the lower base 22, and a sealing ring is arranged between the second-stage groove and the top of the lower base 22 so as to seal the spherical accommodating cavity 24.
Optionally, a third NPT interface 26 communicating with the first stage groove is disposed at a side portion of the upper base 23, and the third NPT interface 26 is a regulated air outlet interface. When the nitrogen spring valve core 1 is filled with gas during use, after the whole internal environment in the spherical accommodating cavity 24 is completely reduced, the internal environment of the pressure reducing valve is simulated, and the pressure of the pressure reducing valve is directly simulated on line through the third NPT interface 26, so that the nitrogen spring valve core is tested, regulated and calibrated.
Wherein, the third NPT interface 26 is provided with a sealing plug 27, and the sealing plug 27 ensures that the interior of the spherical accommodating cavity 24 is in a sealing state when the inflatable cushion is inflated.
Optionally, an upper connection channel communicated with the first-stage groove is arranged at the top of the boss of the upper base 23 so as to be connected with the inflation control structure, and the nitrogen conveyed in the inflation control structure can be ensured to enter the valve core 1.
Optionally, a first groove is disposed at the connection position of the two-stage grooves of the upper base 23, and correspondingly, a second groove is disposed at the inner side of the top of the arc-shaped lower groove of the lower base 22, where the first groove and the second groove form a rotation stopping groove, and the rotation stopping boss 20 of the valve core 1 is disposed in the rotation stopping groove.
In one possible embodiment, the inflation control structure includes an inflation lower cap 28, an inflation upper cap 29, an inflation spring needle 30, and a second spring 31.
The middle part of the bottom of the inflatable lower cover 28 is provided with a connecting bulge which is arranged in an upper connecting channel of the upper base 23, the inflatable lower cover 28 is internally provided with a control channel, and the first NPT interface 21 is arranged at the side part of the inflatable lower cover 28 and communicated with the control channel;
the inflatable upper cover 29 is arranged on the top of the inflatable lower cover 28, and a through hole is arranged on the top of the inflatable upper cover 29;
The inflatable elastic needle 30 is arranged in the control channel, the top of the inflatable elastic needle 30 is positioned at the upper part of the control channel, the second spring 31 is arranged in the control channel at the upper part, the bottom of the second spring 31 is connected with the top of the inflatable elastic needle 30, and the bottom of the inflatable elastic needle 30 can extend into the threaded inflation channel 3 after passing through the control channel and is matched with the hexagonal groove at the top of the conical jackscrew 11 so as to control the action of the conical jackscrew 11.
Wherein, the top that is located the inflatable needle 30 is provided with the recess for with the inflatable needle 30 rotation of pushing down.
In this embodiment, a gasket 32 is provided in the spherical receiving chamber 24 at the gas-filled latch 30 between the spherical receiving chamber 24 and the top of the upper core 2.
In summary, during the use, for nitrogen spring case 1 fills and discharges and pressure regulating calibration usefulness through first NPT interface 21, through the toper jackscrew 11 that fills the bullet needle 30 and loosen during the gas filling, press to fill the bullet needle 30 after accomplishing and screw and close the seal. For example, when the nitrogen spring valve core 1 is inflated, the first NPT port 21 is connected with a pure nitrogen source, the inflation needle 30 is pressed downwards by tools such as an internal hexagonal wrench until the needle of the inflation needle 30 contacts the hexagonal groove of the conical jackscrew 11, then the inflation needle 30 is rotated anticlockwise, the conical jackscrew 11 is loosened, the air chamber 7 can be inflated, when the air in the air chamber 7 meets the requirement, the process is repeated, the inflation needle 30 is pressed downwards until the needle of the inflation needle 30 is inserted into the hexagonal groove of the conical jackscrew 11, the inflation needle 30 is rotated clockwise, and the conical jackscrew 11 (conical head sealing gas) is locked, so that the inflation is completed. Then, the internal environment of the spherical accommodating cavity 24 is regulated through the first NPT interface 21, the second NPT interface 25 and the third NPT interface 26, so that the internal environment of the pressure reducing valve is completely simulated, the valve core 1 of the nitrogen spring loading force type pressure reducing valve is subjected to online pressure regulation, and the valve core 1 is implanted into the pressure reducing valve after the preset pressure regulation and calibration are accurate.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310218552.9A CN115992861B (en) | 2023-03-09 | 2023-03-09 | A nitrogen spring loaded pressure reducing valve and its preset regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310218552.9A CN115992861B (en) | 2023-03-09 | 2023-03-09 | A nitrogen spring loaded pressure reducing valve and its preset regulating device |
Publications (2)
| Publication Number | Publication Date |
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| CN115992861A CN115992861A (en) | 2023-04-21 |
| CN115992861B true CN115992861B (en) | 2025-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310218552.9A Active CN115992861B (en) | 2023-03-09 | 2023-03-09 | A nitrogen spring loaded pressure reducing valve and its preset regulating device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278413A (en) * | 2017-12-22 | 2018-07-13 | 兰州空间技术物理研究所 | A kind of excess pressure valve suitable for the control of space capsule pressure |
| CN109323027A (en) * | 2018-11-28 | 2019-02-12 | 北京控制工程研究所 | A capsule assembly and an absolute pressure reducer |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1438527A (en) * | 1920-06-19 | 1922-12-12 | Bradford B Holmes | Vehicle air spring |
| GB674096A (en) * | 1949-12-14 | 1952-06-18 | Ernest Edward Higgins | Improvements connected with inflation valves for pneumatic tyres and the like |
| JPH0665913B2 (en) * | 1987-03-11 | 1994-08-24 | 日揮株式会社 | Regulator valve |
| JPH10122400A (en) * | 1996-10-14 | 1998-05-15 | Shimadzu Corp | Pressure control valve |
| CN109990990B (en) * | 2019-01-14 | 2024-02-06 | 东莞市博鼎精密机械制造有限公司 | Multifunctional filling and detecting tool for nitrogen spring |
| CN212719194U (en) * | 2020-04-09 | 2021-03-16 | 宁波三安制阀有限公司 | Pressure reducing piston valve |
| CN114076220B (en) * | 2021-08-31 | 2023-06-30 | 北京宇航系统工程研究所 | Integrated electric control safety overflow valve |
-
2023
- 2023-03-09 CN CN202310218552.9A patent/CN115992861B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278413A (en) * | 2017-12-22 | 2018-07-13 | 兰州空间技术物理研究所 | A kind of excess pressure valve suitable for the control of space capsule pressure |
| CN109323027A (en) * | 2018-11-28 | 2019-02-12 | 北京控制工程研究所 | A capsule assembly and an absolute pressure reducer |
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| CN115992861A (en) | 2023-04-21 |
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