CN114607809A - One-way valve and hydrogen storage system of vehicle - Google Patents
One-way valve and hydrogen storage system of vehicle Download PDFInfo
- Publication number
- CN114607809A CN114607809A CN202011442882.9A CN202011442882A CN114607809A CN 114607809 A CN114607809 A CN 114607809A CN 202011442882 A CN202011442882 A CN 202011442882A CN 114607809 A CN114607809 A CN 114607809A
- Authority
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- China
- Prior art keywords
- valve
- pressure control
- air inlet
- control valve
- inner cavity
- 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.)
- Pending
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000001257 hydrogen Substances 0.000 title claims abstract description 18
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 61
- 238000007789 sealing Methods 0.000 claims description 30
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 5
- 230000036316 preload Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
- F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Check Valves (AREA)
Abstract
The application discloses hydrogen storage system of check valve and vehicle, check valve includes: the valve body is internally provided with an air inlet channel and an inner cavity, one end of the air inlet channel is provided with an air inlet, the valve body is provided with an air outlet communicated with the inner cavity, and the other end of the air inlet channel is selectively communicated with the inner cavity; a pressure control valve assembly disposed in the inner chamber; wherein the pressure control valve assembly is configured to open the other end of the inlet passage when the gas pressure in the inlet passage is greater than the preload force of the pressure control valve assembly and to seal the other end of the inlet passage when the gas pressure in the inlet passage is less than the preload force of the pressure control valve assembly. The application discloses a check valve through the cooperation of pressure control valve subassembly and valve body for the check valve has one-way stop function, can effectively prevent that the phenomenon of backward flow from appearing in the gas, and overall structure designs simply reliably, and the processing cost is low.
Description
Technical Field
The application relates to the field of high-pressure gas storage systems, in particular to a hydrogen storage system of a one-way valve and a vehicle.
Background
The check valve is a key part in a hydrogen supply system of a fuel cell automobile and is used for ensuring that hydrogen can only flow in a one-way mode in the process of filling the hydrogen into a pipeline and preventing a backflow phenomenon, and the check valve core is used as one of main vulnerable parts and has great influence on the reliability of the whole system. The existing one-way valve is not provided with a filtering device, the quality of hydrogen passing through the one-way valve cannot be guaranteed, impurities in the hydrogen can abrade a sealing valve of the one-way valve and a pipeline behind the sealing valve through the one-way valve, the impurities can enter a fuel cell reactor to abrade and damage a membrane electrode, and the complex assembly process of the one-way valve directly influences the production efficiency and the reliability of the one-way valve.
Content of application
The present application is directed to solving at least one of the problems in the prior art.
Therefore, an object of the present application is to provide a check valve, which integrates a filtering device and can realize the functions of one-way stopping and hydrogen purification;
another object of the present application is to provide a hydrogen storage system for a vehicle, comprising the check valve as described above.
In order to achieve the above object, one aspect of the present application provides a check valve including: the valve comprises a valve body, wherein an air inlet channel and an inner cavity are arranged in the valve body, an air inlet is formed at one end of the air inlet channel, an air outlet communicated with the inner cavity is formed in the valve body, and the other end of the air inlet channel is selectively communicated with the inner cavity; a pressure control valve assembly disposed in the inner cavity; wherein the pressure control valve assembly is configured to open the other end of the intake passage when the gas pressure within the intake passage is greater than the preload force of the pressure control valve assembly and to seal the other end of the intake passage when the gas pressure within the intake passage is less than the preload force of the pressure control valve assembly.
The application discloses a check valve through the cooperation of pressure control valve subassembly and valve body for the check valve has one-way stop function, can effectively prevent that the phenomenon of backward flow from appearing in the gas, and overall structure designs simply reliably, and the processing cost is low.
Further, the valve body includes: the air inlet channel is arranged in the valve shell, and the air inlet is arranged on the valve shell; the valve cover, the valve cover with the valve casing cooperation is in order to inject the inner chamber, be provided with on the valve cover with the inner chamber intercommunication the gas vent, pressure control valve subassembly's one end sets up on the valve cover, pressure control valve subassembly's the other end is often sealed intake passage the other end.
Further, be provided with in the valve body: the valve comprises a first hole section and a second hole section communicated with the first hole section, the first hole section is constructed into the air inlet channel, and the valve cover is embedded in the second hole section and limits the inner cavity with the second hole section.
Further, a retainer ring for limiting the valve cover to move outwards is arranged on the second hole section.
Further, the pressure control valve assembly includes: one end of the elastic piece is abutted against the valve cover; and the sealing element is connected with the other end of the elastic element and is suitable for normally sealing the other end of the air inlet channel.
Further, the seal includes: a sealing segment having one end adapted to normally seal the other end of the air inlet passage, at least a portion of the sealing segment being spaced from the peripheral wall of the internal cavity to form a first passage; and the matching end is connected with the other end of the sealing section, and is provided with a second channel which is respectively communicated with the first channel and the exhaust port.
Further, the elastic piece is constructed as a spring, a containing cavity for containing the spring is arranged in the matching end, and the containing cavity is communicated with the air outlet and the second channel respectively.
Further, the inner diameter of the air inlet passage is smaller than that of the inner cavity so as to define a step surface, and the sealing section is suitable for normally abutting against the step surface under the action of the elastic force of the spring.
Further, a filter element is arranged in the air inlet channel.
In another aspect, the present application provides a hydrogen storage system for a vehicle, comprising the check valve.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic illustration of a flow through state of a check valve according to an embodiment of the present application;
fig. 2 is a schematic view of a one-way shut-off state of a check valve according to an embodiment of the present application.
Reference numerals:
the one-way valve 100 is a one-way valve,
the flow of air from the air inlet 101, the air outlet 102,
the valve housing 1, the valve cover 2,
the length of the lumen 3, the clearance channel 31,
the intake passage 4, the other end 41 of the intake passage,
the position of the retaining ring 5, the elastic element 6,
the length of the seal segment 71, the mating end 72,
a step surface 8, a filter element 9 and a guide seat 10.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
A check valve 100 according to an embodiment of the present application is described below with reference to fig. 1-2, including: a valve body and a pressure control valve assembly.
Specifically, an air inlet channel 4 and an inner cavity 3 are arranged in the valve body, an air inlet 101 is formed at one end of the air inlet channel, an air outlet 102 communicated with the inner cavity 3 is formed in the valve body, and the other end 41 of the air inlet channel is selectively communicated with the inner cavity 3; the pressure control valve assembly is arranged in the inner cavity 3; wherein the pressure control valve assembly is configured to open the other end 41 of the inlet passage when the gas pressure in the inlet passage 4 is greater than the preload of the pressure control valve assembly and to seal the other end 41 of the inlet passage when the gas pressure in the inlet passage 4 is less than the preload of the pressure control valve assembly.
In the present application, gas enters the gas inlet channel 4 from the gas inlet 101, then flows through the inner cavity 3, and finally is discharged from the gas outlet 102.
Wherein the check valve 100 opens and closes the intake passage 4 through the pressure control valve assembly.
Specifically, when the gas pressure in the gas inlet channel 4 is greater than the pretightening force, the pretightening force of the pressure control valve assembly is not enough to counteract the gas pressure, the gas pushes the pressure control valve assembly towards the inner cavity 3, the pressure control valve assembly is separated from the other end 41 of the gas inlet channel, the other end 41 of the gas inlet channel is opened, the pressure control valve assembly is separated from the other end 41 of the gas inlet channel to form a gap channel 31, the pressure control valve assembly is not closely attached to the inner side peripheral wall of the valve body, and the gas can pass between the pressure control valve assembly and the inner side peripheral wall of the valve body and then is discharged through the gas outlet 102; the gas circulation process comprises the following steps: the gas enters from the gas inlet 101, passes through the gas inlet passage 4, the gap passage 31 and the inner chamber 3, and is finally discharged from the gas outlet 102.
When the gas pressure in the gas inlet channel 4 is smaller than the pretightening force, the gas pressure is not enough to blow open the pressure control valve assembly, the pressure control valve assembly seals the other end 41 of the gas inlet channel at the moment, the pressure control valve assembly is tightly attached to the other end 41 of the gas inlet channel, and the clearance channel 31 is filled with the pressure control valve assembly, so that the gas cannot enter the inner cavity 3 from the other end 41 of the gas inlet channel.
As shown in fig. 1, when gas enters from the gas inlet 101, the gas forms thrust to the pressure control valve assembly to counteract the pre-tightening force provided by the pressure control valve assembly, so that a clearance channel 31 is formed between the pressure control valve assembly and the valve body, and the gas can flow; as shown in fig. 2, when gas forms a reverse flow at the exhaust port 102, the pressure control valve assembly is in an operating state, the gas pressure of the inlet port 101 is not enough to counteract the pre-tightening force of the pressure control valve assembly, and the pressure control valve assembly recovers and blocks the clearance channel 31 formed between the pressure control valve assembly and the valve body, so that the gas cannot pass through the clearance channel, and a one-way overflowing and reverse stopping function is realized.
According to the check valve 100 of the application, through the cooperation of pressure control valve subassembly and valve body for check valve 100 has one-way stop function, can effectively prevent the phenomenon that gaseous backward flow from appearing, and overall structure design is simple reliable, and the processing cost is low.
According to one embodiment of the application, a valve body comprises: a valve housing 1 and a valve cover 2.
Specifically, an air inlet channel 4 is arranged in the valve casing 1, and an air inlet 101 is arranged on the valve casing 1; the valve cover 2 cooperates with the valve housing 1 to define an inner cavity 3, an exhaust port 102 communicating with the inner cavity 3 is provided on the valve cover 2, and one end of a pressure control valve assembly is provided on the valve cover 2, and the other end of the pressure control valve assembly always seals the other end 41 of the intake passage.
The exhaust port 102 is circumferentially arranged on the valve cover 2, and one end of the pressure control valve assembly is fixed or abutted on the valve cover 2 to apply supporting force; the other end of the pressure control valve component seals the other end 41 of the air inlet channel under the action of the pretightening force, and only when the gas pressure is larger than the pretightening force of the pressure control valve component, the other end of the pressure control valve component moves into the cavity under the impact of the gas pressure and opens the blocked air inlet channel 4.
According to an embodiment of the application, provided within the valve body is: the valve comprises a first hole section and a second hole section communicated with the first hole section, wherein the first hole section is constructed into an air inlet channel 4, and a valve cover 2 is embedded in the second hole section and defines an inner cavity 3 with the second hole section.
According to one embodiment of the application, the second bore section is provided with a collar 5 limiting the outward movement of the valve closure 2.
The retaining ring 5 on the one hand positions the pressure control valve assembly and on the other hand prevents the valve cover 2, the valve cover 2 and the pressure control valve assembly from coming out of the valve body.
According to one embodiment of the present application, a pressure control valve assembly includes: an elastic member 6 and a sealing member 7.
Specifically, one end of the elastic piece 6 is abutted against the valve cover 2; the sealing member 7 is connected to the other end of the elastic member 6 and adapted to normally seal the other end 41 of the intake passage.
The elastic piece 6 can provide pre-tightening force, and one end of the elastic piece 6 is stopped against the valve cover 2; the sealing member 7 is always pressed against the other end 41 of the intake passage by the restoring force of the elastic member 6 for sealing the intake passage 4.
According to one embodiment of the present application, the seal 7 comprises: a seal segment and a mating end.
In particular, one end of the sealing section is adapted to normally seal the other end 41 of the air inlet passage, at least part of the sealing section being spaced from the peripheral wall of the inner cavity 3 to form a first passage; the mating end is connected to the other end of the seal segment and is provided with a second channel that communicates with the first channel and the exhaust port 102, respectively.
When gas enters from the gas inlet 101, the gas forms thrust on the sealing section to offset the pretightening force provided by the elastic piece 6, the sealing section pushes towards the inner direction of the cavity, the position where the sealing section is separated from the peripheral wall of the inner cavity 3 is a first channel, and the gas can flow into the inner cavity 3 from the first channel and then is discharged from the gas outlet 102 through a second channel.
According to an embodiment of the application, the resilient member 6 is configured as a spring, and a receiving cavity for receiving the spring is provided in the mating end, the receiving cavity being in communication with the air outlet 102 and the second channel, respectively.
According to an embodiment of the application, the inner diameter of the inlet channel 4 is smaller than the inner diameter of the inner cavity 3 to define a step surface 8, and the sealing segment is adapted to normally abut against the step surface 8 under the spring force of the spring.
The diameter of the sealing section may be greater than or equal to the inner diameter of the inlet channel 4 so that the other end 41 of the inlet channel is completely sealed. For convenience of use, the other end 41 of the air inlet channel is not blocked by the sealing section and loses effect due to the fact that the other end 41 of the air inlet channel is not inclined due to uneven thrust of a spring when the other end 41 of the air inlet channel is opened to the other end 41 of the air inlet channel in a closed mode, the diameter of the sealing section is designed to be larger than the inner diameter of the air inlet channel 4, and therefore even if errors exist in the position of the sealing section in the blocking process, normal use of the check valve 100 cannot be affected.
According to one embodiment of the application, a filter element 9 is also arranged in the inlet channel 4.
According to an embodiment of the present application, a guide seat 10 is further provided inside the intake passage 4.
The guide seat 10 can guide the high-speed gas of the gas inlet 101, the generation of vortex can be reduced, the temperature rise can be effectively avoided, and the guide seat 10 is arranged at the upstream of the filtering piece 9, so that the impact abrasion of the high-speed gas to the filtering piece 9 can be reduced.
It should be noted that the gas flows from upstream to downstream, where upstream refers to the location where the gas flows first and downstream refers to the location where the gas flows later.
The hydrogen storage system of a vehicle according to an embodiment of the present application includes the check valve 100 described above. The check valve 100 is used as a key part in a hydrogen storage system of a fuel cell vehicle, and has great influence on the whole hydrogen storage system, the check valve 100 integrates a filtering device, and can realize the functions of one-way stopping and hydrogen purification, thereby improving the safety of the hydrogen storage system in use.
In the description of the present application, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present application, "a plurality" means two or more.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A one-way valve, comprising:
the air inlet valve comprises a valve body, wherein an air inlet channel (4) and an inner cavity (3) are arranged in the valve body, an air inlet (101) is formed at one end of the air inlet channel, an air outlet (102) communicated with the inner cavity (3) is formed in the valve body, and the other end (41) of the air inlet channel is selectively communicated with the inner cavity (3);
a pressure control valve assembly disposed in the inner cavity (3); wherein
The pressure control valve assembly is configured to open the other end (41) of the inlet passage (4) when the gas pressure in the inlet passage is greater than the pretension of the pressure control valve assembly and to seal the other end (41) of the inlet passage when the gas pressure in the inlet passage (4) is less than the pretension of the pressure control valve assembly.
2. The one-way valve of claim 1, wherein the valve body comprises:
the air inlet channel (4) is arranged in the valve shell (1), and the air inlet (101) is formed in the valve shell (1);
valve gap (2), valve gap (2) with valve casing (1) cooperation is in order to inject inner chamber (3), be provided with on valve gap (2) with inner chamber (3) intercommunication gas vent (102), pressure control valve subassembly's one end sets up on valve gap (2), pressure control valve subassembly's the other end is often sealed intake passage the other end (41).
3. The check valve of claim 2, wherein the valve body has disposed therein: the valve comprises a first hole section and a second hole section communicated with the first hole section, wherein the first hole section is constructed into the air inlet channel (4), the valve cover (2) is embedded in the second hole section and limits the inner cavity (3) with the second hole section.
4. A one-way valve according to claim 3, wherein the second bore section is provided with a collar (5) which limits outward movement of the valve cover (2).
5. The one-way valve of claim 1, wherein the pressure control valve assembly comprises:
one end of the elastic piece (6) is abutted against the valve cover (2);
a sealing member connected to the other end of the elastic member (6) and adapted to normally seal the other end (41) of the intake passage.
6. The one-way valve of claim 5, wherein the seal comprises:
a sealing section (71), one end of the sealing section (71) is suitable for normally sealing the other end (41) of the air inlet passage, and at least part of the sealing section (71) is spaced from the peripheral wall of the inner cavity (3) to form a first passage;
the sealing ring comprises a matching end (72), the matching end (72) is connected with the other end of the sealing section (71), and a second channel which is respectively communicated with the first channel and the air outlet (102) is arranged on the matching end (72).
7. The non-return valve according to claim 6, characterized in that the elastic member (6) is configured as a spring, and in that a receiving chamber for receiving the spring is provided in the mating end (72), the receiving chamber communicating with the air outlet (102) and the second passage, respectively.
8. The non-return valve according to claim 7, characterized in that the internal diameter of the intake channel (4) is smaller than the internal diameter of the internal cavity (3) to define a step surface (8), the sealing segment (71) being adapted to normally rest against the step surface (8) under the spring force of the spring.
9. Non-return valve according to claim 1, characterised in that a filter element (9) is also arranged in the inlet channel (4).
10. A hydrogen storage system for a vehicle, characterized by comprising a one-way valve according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011442882.9A CN114607809A (en) | 2020-12-08 | 2020-12-08 | One-way valve and hydrogen storage system of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011442882.9A CN114607809A (en) | 2020-12-08 | 2020-12-08 | One-way valve and hydrogen storage system of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114607809A true CN114607809A (en) | 2022-06-10 |
Family
ID=81856772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011442882.9A Pending CN114607809A (en) | 2020-12-08 | 2020-12-08 | One-way valve and hydrogen storage system of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114607809A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201339733Y (en) * | 2008-12-29 | 2009-11-04 | 罗达莱克斯阀门(上海)有限公司 | Charging valve for motor vehicle |
| CN106949267A (en) * | 2017-04-22 | 2017-07-14 | 张家港富瑞阀门有限公司 | A kind of novel high-pressure is hydrogenated with mouth |
| CN108223858A (en) * | 2017-08-08 | 2018-06-29 | 河南航天液压气动技术有限公司 | Valve sealing structure, valve and the low pressure valve using the sealing structure |
| CN207777693U (en) * | 2018-01-16 | 2018-08-28 | 扬州市职业大学 | A kind of check-valves |
| CN207848500U (en) * | 2018-01-31 | 2018-09-11 | 乐清市铭锐气动科技有限公司 | A kind of filtering pressure regulator valve |
-
2020
- 2020-12-08 CN CN202011442882.9A patent/CN114607809A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201339733Y (en) * | 2008-12-29 | 2009-11-04 | 罗达莱克斯阀门(上海)有限公司 | Charging valve for motor vehicle |
| CN106949267A (en) * | 2017-04-22 | 2017-07-14 | 张家港富瑞阀门有限公司 | A kind of novel high-pressure is hydrogenated with mouth |
| CN108223858A (en) * | 2017-08-08 | 2018-06-29 | 河南航天液压气动技术有限公司 | Valve sealing structure, valve and the low pressure valve using the sealing structure |
| CN207777693U (en) * | 2018-01-16 | 2018-08-28 | 扬州市职业大学 | A kind of check-valves |
| CN207848500U (en) * | 2018-01-31 | 2018-09-11 | 乐清市铭锐气动科技有限公司 | A kind of filtering pressure regulator valve |
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