CN114877259B - Gas pressure regulator capable of reducing fatigue damage - Google Patents
Gas pressure regulator capable of reducing fatigue damage Download PDFInfo
- Publication number
- CN114877259B CN114877259B CN202210513728.9A CN202210513728A CN114877259B CN 114877259 B CN114877259 B CN 114877259B CN 202210513728 A CN202210513728 A CN 202210513728A CN 114877259 B CN114877259 B CN 114877259B
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- China
- Prior art keywords
- air chamber
- chamber
- pressure regulator
- pressure regulating
- gas pressure
- 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.)
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 239000012528 membrane Substances 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 230000005389 magnetism Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 26
- 238000005457 optimization Methods 0.000 description 6
- 239000003209 petroleum derivative Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
-
- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The application belongs to the technical field of gas pressure regulating equipment, and particularly relates to a gas pressure regulator capable of reducing fatigue damage, which comprises a pressure regulating cavity, wherein the pressure regulating cavity is divided into an upper air chamber and a lower air chamber, the middle positions of the upper air chamber and the lower air chamber are separated by a rubber membrane, the rubber membrane is driven to move up and down by a lever assembly arranged on the lower air chamber, a base is arranged at the central position of the upper end of the rubber membrane, and a permanent magnet is arranged at the upper end of the base; fine tuning chambers are arranged in the chamber walls at two sides of the pressure regulating chamber in the horizontal direction; according to the application, the pressure regulator drives the electromagnet to generate magnetism through the rubber film upward movement, the repulsive force between the pressure regulator and the permanent magnet is embodied by the spring in the prior art, so that the mechanical fatigue of the spring of the upper air chamber in the long-time reciprocating stretching and compressing process can be avoided, the local permanent accumulated damage is gradually generated, and the safety performance is better.
Description
Technical Field
The application belongs to the technical field of fuel gas pressure regulating equipment, and particularly relates to a fuel gas pressure regulator capable of reducing fatigue damage.
Background
The gas pressure regulator is specially suitable for being used as gas pressure regulating equipment for regulating and stabilizing pressure in a gas transmission and distribution system, and is widely applied to gas transmission and distribution engineering. The gas outlet pressure regulator has the function of automatically regulating the gas outlet pressure to be stable in a certain pressure range, so as to meet the pressure value required by a user and meet the use requirement.
In the existing industrial gas system, as each node in the system needs to step up or down the pressure of the gas, a large number of pressure regulators are arranged in the system, but the pressure reducing requirements of the pressure regulators of each node are different, a large number of pressure regulators with different models are needed, and the purchasing cost is high; in addition, in the long-term use process of the pressure regulator in the system, the right end of the lever in the pressure regulating cavity of the traditional pressure regulator is connected with the center of the rubber film, the left end of the lever is adhered with the valve pad and is tightly buckled on the air inlet nozzle to generate damping action on the sprayed high-pressure petroleum gas, the spring of the upper air chamber is mechanically tired in the long-time reciprocating stretching and compressing process, the local permanent accumulated damage is gradually generated, and the risk of cracking or sudden complete fracture is generated after a certain number of cycles, so that the pressure regulating performance of the pressure regulator can be influenced after long-time use, and the pressure regulating system has higher potential safety hazard.
Disclosure of Invention
The application aims to provide a gas pressure regulator capable of reducing fatigue damage so as to solve the problems in the background technology.
The application realizes the above purpose through the following technical scheme:
the gas pressure regulator comprises a pressure regulating cavity, wherein the pressure regulating cavity is divided into an upper air chamber and a lower air chamber, the middle positions of the upper air chamber and the lower air chamber are separated by a rubber membrane, the central position of the rubber membrane is driven to move up and down by a lever assembly arranged on the lower air chamber, a base is arranged at the central position of the upper end of the rubber membrane, and a permanent magnet is arranged at the upper end of the base;
the pressure regulating cavity is characterized in that fine-tuning cavities are formed in cavity walls on two sides in the horizontal direction of the pressure regulating cavity, connecting rods are arranged on the side edges of the base, the end parts of the connecting rods extend into the fine-tuning cavities and are provided with guide blocks, and a distance sensor is arranged at the top of the fine-tuning cavities and right above the guide blocks;
the top of going up the air chamber and being located be equipped with electro-magnet and automatically controlled subassembly directly over the permanent magnet, automatically controlled subassembly includes controller, power supply unit, distance sensor's output with the input electricity of controller is connected, the output of controller with power supply unit's control end is connected, power supply unit's output with the input of electro-magnet is connected.
As a further optimization scheme of the application, the base is made of ultra-light PC material.
As a further optimization scheme of the application, the guide block is made of magnetic materials.
As a further optimization scheme of the application, an iron slide block is further arranged in the fine adjustment cavity, the sliding contact surface of the fine adjustment cavity and the iron slide block is conical, the distance sensor is positioned on the lower end surface of the iron slide block, a limit slot hole is formed in the side edge of the iron slide block, a limit inserted rod is inserted in the limit slot hole, and the end part of the limit inserted rod extends to the outer side of the upper air chamber.
As a further optimization scheme of the application, a plurality of through grooves communicated with the fine adjustment cavity are formed in the side edge of the upper air chamber, the limiting inserted rod penetrates through the through grooves, and a telescopic spring is sleeved on the rod body between the limiting inserted rod and the through grooves.
As a further refinement of the application, an adjustment gap is formed in the trimming chamber and in the space between the guide block and the distance sensor.
As a further optimization scheme of the application, the upper air chamber and the lower air chamber are locked and sealed through locking buckles.
As a further optimization scheme of the application, the base is detachably connected with the permanent magnets, so that the permanent magnets with different magnetic force values can be replaced conveniently.
The application has the beneficial effects that:
1) The pressure regulator drives the electromagnet to generate magnetism through the rubber film upward movement, the repulsive force between the pressure regulator and the permanent magnet is reflected by the spring in the prior art, the mechanical fatigue of the spring of the upper air chamber in the long-time reciprocating extension and compression process can be avoided, the local permanent accumulated damage is gradually generated, and the safety performance is better;
2) Aiming at different pressure reducing requirements of pressure regulators of all nodes in the gas system, the application can flexibly adjust the pressure regulating amplitude and the gas pressure value, and in the process of building the gas system, the application does not need to purchase various types of gas pressure regulators, thereby further reducing the cost and simultaneously reducing the overhaul working intensity; compared with the voltage regulator with the same model, the voltage regulator can reduce fatigue damage in the long-time use process due to different gas pressure in the circuit with obviously different gas pressure values in the system.
Drawings
FIG. 1 is a schematic view of the overall structure of the present application;
FIG. 2 is a schematic view of a partial cross-sectional structure of the present application;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present application
Fig. 4 is an enlarged schematic view of the structure of fig. 2 a according to the present application.
In the figure: 1. a valve body; 2. a pressure regulating cavity; 3. an air inlet; 4. an air outlet; 5. a lever assembly; 6. a rubber film; 7. a base; 8. a permanent magnet; 9. an electromagnet; 10. a distance sensor; 11. a controller; 12. a power supply assembly; 13. a connecting rod; 14. a fine tuning chamber; 15. a guide block; 16. an iron slide block; 17. adjusting the gap; 18. limiting slot holes; 19. a limit inserted link; 20. a telescopic spring; 21. and (5) through grooves.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings, wherein it is to be understood that the following detailed description is for the purpose of further illustrating the application only and is not to be construed as limiting the scope of the application, as various insubstantial modifications and adaptations of the application to those skilled in the art can be made in light of the foregoing disclosure.
Example 1
As shown in fig. 1-3, a gas pressure regulator capable of reducing fatigue damage comprises a pressure regulating cavity 2, wherein the pressure regulating cavity 2 is divided into an upper air chamber and a lower air chamber, the middle positions of the upper air chamber and the lower air chamber are separated by a rubber film 6, the rubber film 6 is driven to move up and down by a lever assembly 5 arranged on the lower air chamber, a base 7 is arranged at the central position of the upper end of the rubber film 6, and a permanent magnet 8 is arranged at the upper end of the base 7;
in the prior art, the gas pressure regulator comprises a valve body 1 and a pressure regulating cavity 2, wherein an air inlet 3 and an air outlet 4 are respectively arranged at two ends of the pressure regulating cavity 2, high-pressure petroleum gas enters a lower air chamber through an air inlet 3 when working, the pressure of the lower air chamber is increased along with the increase of gas in the lower air chamber, a rubber membrane 6 is forced to be raised upwards, the volume of the upper air chamber is gradually reduced, when the pressure of the upper air chamber is higher than the atmospheric pressure, indoor air is slowly discharged from a breathing hole arranged in the upper air chamber, the one-time expiration process of the pressure regulator is completed, the right end of a lever of the lever assembly is moved upwards, the left end is pressed downwards, an air inlet nozzle is gradually closed, the air supply is stopped, the pressure of the lower air chamber is not increased any more, and after an external port of the air outlet 4 is unblocked, the pressure of the lower air chamber is reduced, the right end of the lever is driven to move downwards and the left end, the valve pad is opened, the high-pressure petroleum gas enters the lower air chamber.
The two side cavity walls of the pressure regulating cavity 2 in the horizontal direction are respectively provided with a fine tuning cavity 14, the side edge of the base 7 is provided with a connecting rod 13, the end part of the connecting rod 13 extends into the fine tuning cavity 14 and is provided with a guide block 15, and the top of the fine tuning cavity 14 is provided with a distance sensor 10 right above the guide block 15;
the top of the upper air chamber and right above the permanent magnet 8 are provided with an electromagnet 9 and an electric control assembly, the electric control assembly comprises a controller 11 and a power supply assembly 12, the output end of the distance sensor 10 is electrically connected with the input end of the controller 11, the output end of the controller 11 is connected with the control end of the power supply assembly 12, and the output end of the power supply assembly 12 is connected with the input end of the electromagnet 9.
The permanent magnet 8 has the same magnetism as that after energization.
In the working process of the pressure regulator, when the center of the rubber film 6 moves upwards under the drive of the lever assembly 5, the base 7 and the permanent magnet 8 are driven to move upwards synchronously, due to the arrangement of the connecting rod and the guide block 15, the guide block 15 is driven to move upwards in the fine adjustment cavity 14 synchronously, the position of the guide block 15 is detected through the distance sensor 10, when the distance reaches the preset distance, the distance sensor 10 transmits a signal to the controller 11, the controller 11 controls the power supply assembly 12 to supply power to the electromagnet 9, the electromagnet 9 generates magnetism after being electrified and has the same magnetism as the permanent magnet 8, so that repulsive force can be generated between the electromagnet 9 and the permanent magnet 8, the spring in the prior art is replaced, and the influence of fatigue damage of the spring used for a long time on the performance of the gas pressure regulator is reduced.
Specifically, the base 7 is made of an ultralight PC material, so that the weight of the rubber film 6 is reduced.
Specifically, the upper air chamber and the lower air chamber are locked and sealed through a locking buckle.
Specifically, the base 7 is detachably connected with the permanent magnet 8, so that the permanent magnet 8 with different magnetic force can be replaced conveniently.
Example 2
As shown in fig. 4, in this embodiment, the guide block 15 is made of a magnetic material, the fine tuning chamber 14 is further provided with an iron slide block 16, the sliding contact between the fine tuning chamber 14 and the iron slide block 16 is conical, the distance sensor 10 is located on the lower end surface of the iron slide block 16, a limit slot 18 is formed in the side edge of the iron slide block 16, a limit insert rod 19 is inserted into the limit slot 18, and the end of the limit insert rod 19 extends to the outer side of the upper air chamber.
Specifically, a plurality of through grooves 21 communicated with the fine tuning chamber 14 are formed in the side edge of the upper air chamber, the limiting inserted rod 19 penetrates through the through grooves 21, and a telescopic spring 20 is sleeved on the rod body between the limiting inserted rod 19 and the through grooves 21.
Specifically, an adjustment gap 17 is formed in the fine tuning chamber 14 and in the space between the guide block 15 and the distance sensor 10.
In this embodiment, when the rubber film 6 drives the permanent magnet 8 to move upwards, the adsorption effect between the guide block 15 and the iron slide block 16 can offset the repulsive force effect between part of the permanent magnet 8 and the electromagnet 9 in the upward moving process, so that the damping of the upward moving of the right end of the lever assembly 5 becomes larger, the process of reducing the volume of the upper air chamber is gradually slowed down, the air inlet nozzle can be delayed to be closed, and meanwhile, the iron slide block 16 can be limited by adjusting the through grooves 21 of the limiting inserted rod 19 penetrating through different positions, for example, when the iron slide block 16 is adjusted to move upwards, the suction force between the iron slide block 16 and the guide block 15 is used for increasing and reducing the distance, obviously, the influence of the adsorption force on the upward moving of the permanent magnet 8 can be reduced, and the scheme can be used for adjusting the pressure regulator with different pressure regulating ranges and air inlet demands in different scenes in the system, meanwhile, the pressure regulating range and the gas pressure value can be flexibly adjusted, in the gas system building process, the pressure regulator does not need to be purchased for multiple types of gas, the pressure regulator can be further reduced, and the maintenance working strength is reduced; compared with the voltage regulator with the same model, the voltage regulator in the embodiment can obviously reduce fatigue damage in the long-time use process due to different gas pressure in the circuit with obviously different gas pressure values in the system.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.
Claims (4)
1. The utility model provides a gas pressure regulator that can reduce fatigue damage, includes pressure regulating chamber (2), and pressure regulating chamber (2) divide into air chamber, lower air chamber, and go up air chamber, lower air chamber intermediate position and separate through rubber membrane (6), rubber membrane (6) are by locating lever assembly (5) drive reciprocates, its characterized in that down the air chamber: a base (7) is arranged at the center of the upper end of the rubber film (6), and a permanent magnet (8) is arranged at the upper end of the base (7);
the pressure regulating cavity (2) is characterized in that fine-tuning cavities (14) are formed in the cavity walls on two sides in the horizontal direction, a connecting rod (13) is arranged on the side edge of the base (7), the end part of the connecting rod (13) extends into the fine-tuning cavities (14) and is provided with guide blocks (15), and a distance sensor (10) is arranged at the top of the fine-tuning cavities (14) and is positioned right above the guide blocks (15);
the top of the upper air chamber and right above the permanent magnet (8) is provided with an electromagnet (9) and an electric control assembly, the electric control assembly comprises a controller (11) and a power supply assembly (12), the output end of the distance sensor (10) is electrically connected with the input end of the controller (11), the output end of the controller (11) is connected with the control end of the power supply assembly (12), and the output end of the power supply assembly (12) is connected with the input end of the electromagnet (9);
the guide block (15) is made of magnetic materials;
an iron slide block (16) is further arranged in the fine adjustment chamber (14), the sliding contact surface of the fine adjustment chamber (14) and the iron slide block (16) is conical, the distance sensor (10) is positioned on the lower end surface of the iron slide block (16), a limit slot hole (18) is formed in the side edge of the iron slide block (16), a limit inserting rod (19) is inserted into the limit slot hole (18), and the end part of the limit inserting rod (19) extends to the outer side of the upper air chamber;
a plurality of through grooves (21) communicated with the fine adjustment chamber (14) are formed in the side edge of the upper air chamber, the limiting inserted rod (19) penetrates through the through grooves (21), and a telescopic spring (20) is sleeved on the rod body between the limiting inserted rod (19) and the through grooves (21);
an adjustment gap (17) is formed in the trimming chamber (14) and in the space between the guide block (15) and the distance sensor (10).
2. The gas pressure regulator capable of reducing fatigue damage according to claim 1, wherein: the base (7) is made of ultra-light PC material.
3. The gas pressure regulator capable of reducing fatigue damage according to claim 1, wherein: the upper air chamber and the lower air chamber are locked and sealed through a locking buckle.
4. The gas pressure regulator capable of reducing fatigue damage according to claim 1, wherein: the base (7) and the permanent magnets (8) are detachably connected, so that the permanent magnets (8) with different magnetic force magnitudes can be replaced conveniently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210513728.9A CN114877259B (en) | 2022-05-12 | 2022-05-12 | Gas pressure regulator capable of reducing fatigue damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210513728.9A CN114877259B (en) | 2022-05-12 | 2022-05-12 | Gas pressure regulator capable of reducing fatigue damage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114877259A CN114877259A (en) | 2022-08-09 |
| CN114877259B true CN114877259B (en) | 2023-10-27 |
Family
ID=82675971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210513728.9A Active CN114877259B (en) | 2022-05-12 | 2022-05-12 | Gas pressure regulator capable of reducing fatigue damage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114877259B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244727A (en) * | 2012-02-14 | 2013-08-14 | 罗达莱克斯阀门(上海)有限公司 | Pressure regulating device and pressure regulator thereof |
| CN203413190U (en) * | 2013-07-02 | 2014-01-29 | 河北兆唐燃气设备制造有限公司 | Fire-proof safety valve with lever vertical elastic structure |
| CN103759064A (en) * | 2014-01-09 | 2014-04-30 | 合肥远智自动化科技有限公司 | Ultralow-pressure precise pressure reducing valve |
| CN105257876A (en) * | 2015-10-30 | 2016-01-20 | 重庆市界石燃气设备有限公司 | Stable-fuel-gas-pressure regulation device |
| CN205278466U (en) * | 2015-11-20 | 2016-06-01 | 重庆山能仪表有限公司 | Spring induction type check valve |
| AT520540B1 (en) * | 2017-11-14 | 2019-05-15 | Hoerbiger Kompressortech Hold | Electromagnetic release |
| CN111853538A (en) * | 2020-08-22 | 2020-10-30 | 嵊州市浙江工业大学创新研究院 | Bottled liquefied petroleum gas pressure regulator with flameout protection function |
-
2022
- 2022-05-12 CN CN202210513728.9A patent/CN114877259B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244727A (en) * | 2012-02-14 | 2013-08-14 | 罗达莱克斯阀门(上海)有限公司 | Pressure regulating device and pressure regulator thereof |
| CN203413190U (en) * | 2013-07-02 | 2014-01-29 | 河北兆唐燃气设备制造有限公司 | Fire-proof safety valve with lever vertical elastic structure |
| CN103759064A (en) * | 2014-01-09 | 2014-04-30 | 合肥远智自动化科技有限公司 | Ultralow-pressure precise pressure reducing valve |
| CN105257876A (en) * | 2015-10-30 | 2016-01-20 | 重庆市界石燃气设备有限公司 | Stable-fuel-gas-pressure regulation device |
| CN205278466U (en) * | 2015-11-20 | 2016-06-01 | 重庆山能仪表有限公司 | Spring induction type check valve |
| AT520540B1 (en) * | 2017-11-14 | 2019-05-15 | Hoerbiger Kompressortech Hold | Electromagnetic release |
| CN111853538A (en) * | 2020-08-22 | 2020-10-30 | 嵊州市浙江工业大学创新研究院 | Bottled liquefied petroleum gas pressure regulator with flameout protection function |
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| Publication number | Publication date |
|---|---|
| CN114877259A (en) | 2022-08-09 |
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