CN206592603U - A kind of natural gas engine pressure maintaining valve - Google Patents
A kind of natural gas engine pressure maintaining valve Download PDFInfo
- Publication number
- CN206592603U CN206592603U CN201720345920.6U CN201720345920U CN206592603U CN 206592603 U CN206592603 U CN 206592603U CN 201720345920 U CN201720345920 U CN 201720345920U CN 206592603 U CN206592603 U CN 206592603U
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- CN
- China
- Prior art keywords
- piston
- valve body
- natural gas
- pressure maintaining
- gas engine
- 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.)
- Expired - Fee Related
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Classifications
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- 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
Abstract
The utility model discloses a kind of natural gas engine pressure maintaining valve, include valve body, the front portion of valve body is provided with inlet chamber, its rear portion is provided with pressure stabilizing cavity, the piston that can be moved axially is provided with pressure stabilizing cavity, the piston was provided centrally with gas passage, and the front portion of piston is stretched into inlet chamber through the middle part of valve body, spring is provided between piston and valve body；Valve body is fixedly arranged at the front end with protecgulum, the intake interface for being provided centrally with air inlet is equipped with the protecgulum, the rear end of valve body is fixed with bonnet, covered after this and be equipped with the outlet interface for being provided centrally with gas outlet, sealing pad assembly is provided between protecgulum and valve body, air passing hole is offered on the periphery of the upper periphery anterior in piston of the sealing pad assembly.The utility model has the advantage of：It is simple in construction, flow is adjusted by the piston of axial movement, and be finally reached the purpose of voltage stabilizing；The moving direction of piston is consistent with the import and export direction of natural gas, it is possible to increase the influence speed of voltage stabilizing, makes voltage regulation result more preferable.
Description
Technical field
The utility model is related to pressure maintaining valve manufacturing technology field, especially a kind of natural gas engine pressure maintaining valve.
Background technology
With the popularization of automobile, the pollution caused by vehicle exhaust is also on the rise, and vehicle exhaust is the production of fuel oil burning
Thing, can not only be polluted to air, and also have great harm to the health of human body.In order to caused by reducing vehicle exhaust
Pollution, some present automobiles use this clean energy resource of natural gas instead as the power source of automobile, with the change of power source, vapour
The engine of car also needs response to be changed to natural gas engine.In order to ensure the stability of natural gas engine air inlet, pressure maintaining valve is
One of them highly important part, the quality of its quality will directly affect operation and the service life of natural gas engine.
Utility model patent such as Patent No. 201320667674.8 entitled " gas pressure maintaining valve " discloses a kind of gas
Body pressure maintaining valve, including valve body and valve rod, are provided with valve rod antifriction part, one end of valve rod is equipped with valve between the valve body and valve rod
Valve, the side of the close valve rod of flap, which is provided with, is used for the sealing structure that the interface channel sealing with valve body coordinates, opposite side and valve
Back-moving spring is top-loaded between body, the flap is in multidiameter structure, it includes the big footpath section being connected with valve rod and and valve body
Inwall on set pilot hole be oriented to the path section coordinated, flap antifriction part is provided between path section and valve body.The pressure maintaining valve
Complicated, assembling is bothered, therefore its structure is further improved.
The content of the invention
Technical problem to be solved in the utility model be the present situation for prior art there is provided simple in construction, compact, ring
Answer speed fast, a kind of good natural gas engine pressure maintaining valve of voltage regulation result.
The utility model solve the technical scheme that is used of above-mentioned technical problem for：
A kind of natural gas engine pressure maintaining valve, includes valve body, and the front portion of valve body is provided with inlet chamber, and its rear portion is provided with
It is provided with the piston that can be moved axially in pressure stabilizing cavity, pressure stabilizing cavity, the piston was provided centrally with gas passage, and the front portion of piston is worn
Cross the middle part of valve body and stretch into inlet chamber, spring is provided between piston and valve body；Valve body is fixedly arranged at the front end with protecgulum, before this
Cover and be equipped with the intake interface for being provided centrally with air inlet, the rear end of valve body is fixed with bonnet, cover the center of being equipped with after this
The outlet interface of gas outlet is provided with, sealing pad assembly is provided between protecgulum and valve body, the sealing pad assembly is upper in piston
Air passing hole is offered on the periphery of anterior periphery.
The technical measures of optimization also include：
The rear portion periphery of above-mentioned piston is provided with seal groove, and piston packing is provided with the seal groove.
A dust ring is equipped with the middle part of above-mentioned valve body, the inner ring of the dust ring and the outer wall of piston front portion are affixed and matched somebody with somebody
Close.
The posterior center of above-mentioned piston is formed with an enlarged cavity, and enlarged cavity is connected with crossing the rear end of gas passage.
The bottom of above-mentioned valve body is provided with an exhaust joint, and steam vent, steam vent and institute are provided with the exhaust joint
Pressure stabilizing cavity is stated to be connected.
Preceding sealing ring is provided between above-mentioned protecgulum and the valve body, is sealed after being provided between bonnet and the valve body
Circle.
Covered after above-mentioned and be fixed with mounting bracket, fixing hole is provided with mounting bracket.
A kind of natural gas engine pressure maintaining valve of the utility model, simple in construction, it is provided with energy in the pressure stabilizing cavity of valve body
The piston of axial movement, the front portion of piston is stretched into inlet chamber through the middle part of valve body, and natural gas is logical by gas in inlet chamber
The right side of piston is come in road, and overcomes the elastic force of spring to push away piston to the left, and piston is moved to left, piston nose and sealing pad assembly
Gap reduces, and the flow of natural gas reduces, and when the elastic force of pressure and spring on the right side of piston balances each other, piston is just in pressure stabilizing cavity
Dynamic equilibrium is inside reached, at this moment the flow of natural gas is also just settled out, so as to reach the purpose of voltage stabilizing.The shifting of piston
Dynamic direction is consistent with the import and export direction of natural gas, it is possible to increase the influence speed of voltage stabilizing, makes voltage regulation result more preferable.
Brief description of the drawings
Fig. 1 is sectional structure chart of the present utility model；
Fig. 2 is A portions enlarged drawing in Fig. 1；
Fig. 3 is B portions enlarged drawing in Fig. 1；
Fig. 4 is left view of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
It is structural representation of the present utility model as shown in Figures 1 to 4,
Reference therein is：Valve body 1, inlet chamber 1a, pressure stabilizing cavity 1b, dust ring 11, mounting bracket 12, fixing hole
12a, piston 2, cross gas passage 2a, enlarged cavity 2b, seal groove 21, piston packing 22, spring 3, protecgulum 4, preceding sealing ring 41,
Intake interface 5, air inlet 5a, bonnet 6, rear sealing ring 61, outlet interface 7, gas outlet 7a, sealing pad assembly 8, air passing hole 8a,
Exhaust joint 9, steam vent 9a.
As shown in Figures 1 to 4,
A kind of natural gas engine pressure maintaining valve, includes valve body 1, and the front portion of valve body 1 is provided with inlet chamber 1a, and its rear portion is set
It is equipped with the piston 2 that is provided with and can move axially in pressure stabilizing cavity 1b, pressure stabilizing cavity 1b, the piston 2 was provided centrally with gas passage 2a,
The front portion of piston 2 is stretched into inlet chamber 1a through the middle part of valve body 1, and spring 3 is provided between piston 2 and valve body 1；Valve body 1
Be fixedly arranged at the front end with protecgulum 4, be equipped with the intake interface 5 for being provided centrally with air inlet 5a on the protecgulum 4, the rear end of valve body 1 is consolidated
Surely there is bonnet 6, the outlet interface 7 for being provided centrally with gas outlet 7a is equipped with the bonnet 6, is provided between protecgulum 4 and valve body 1
Seal on pad assembly 8, the sealing pad assembly 8 to be located on the periphery of the anterior periphery of piston 2 and offer air passing hole 8a.
In embodiment, the rear portion periphery of piston 2 is provided with seal groove 21, and piston seal is provided with the seal groove 21
Circle 22.Piston packing 22 ensure that sealing between the right side of piston 2 and spring 3, it is ensured that pressure maintaining valve can normally, stably make
With.
In embodiment, the middle part of valve body 1 is equipped with a dust ring 11, anterior outer of the inner ring of the dust ring 11 and piston 2
Wall is affixed cooperation.Dust ring 11 ensures the sealing between inlet chamber 1a and pressure stabilizing cavity 1b, while preventing attachment in pressure stabilizing cavity 1b
Impurity on the anterior outer wall of piston 2 enters in inlet chamber 1a and influences the normal work of piston.
In embodiment, the posterior center of piston 2 is formed with an enlarged cavity 2b, and enlarged cavity 2b is connected with crossing gas passage 2a rear end
It is logical.
In embodiment, the bottom of valve body 1 is provided with an exhaust joint 9, and steam vent 9a is provided with the exhaust joint 9, row
Stomata 9a is connected with the pressure stabilizing cavity 1b.
Exhaust joint 9 is set to discharge excessive gas in pressure stabilizing cavity 1b, it is to avoid residual gas institute shape in pressure stabilizing cavity 1b
Into pressure build-up of pressure regulation deviation.
In embodiment, sealing ring 41 before being provided between protecgulum 4 and the valve body 1 is set between bonnet 6 and the valve body 1
It is equipped with rear sealing ring 61.
In embodiment, it is fixed with bonnet 6 in mounting bracket 12, mounting bracket 12 and is provided with fixing hole 12a.Set and install
Support 12 greatly facilitates pressure maintaining valve and installs fixation.
Operation principle：
Natural gas enters in pressure maintaining valve from the air inlet 5a of intake interface 5, and by sealing air passing hole 8a on pad assembly 8
Into inlet chamber 1a, air passing hole 8a is arranged on the periphery of the anterior periphery of piston 2 here, it is to avoid air passing hole 8a is opposite
Gas passage 2a is crossed to set and influence pressure maintaining valve to play its due effect.
Piston 2 moves to right limit in the elastic force effect bottom right of spring 3, between making between the front end of piston 2 and sealing pad assembly 8
Gap increases, and gas discharge increase, air pressure increases therewith；Natural gas crosses gas passage 2a streams through the center of piston 2 in inlet chamber 1a
To the right side of piston 2, with the increase of right side air pressure, piston 2 will be pushed back to the left, with moving to left for piston 2, gas discharge
Reduce, air pressure reduces therewith；When the elastic force of the pressure and spring 3 on the right side of piston 2 balances each other, stability of flow, air pressure also with
It is stable, so as to reach the purpose of voltage stabilizing.
Most preferred embodiment of the present utility model has been illustrated, the various change or remodeling made by those of ordinary skill in the art
All without departing from scope of the present utility model.
Claims (7)
1. a kind of natural gas engine pressure maintaining valve, includes valve body (1), it is characterized in that：The front portion of described valve body (1) is provided with
Inlet chamber (1a), its rear portion is provided with pressure stabilizing cavity (1b), described pressure stabilizing cavity (1b) and is provided with the piston that can be moved axially
(2), the piston (2) was provided centrally with gas passage (2a), and the front portion of described piston (2) is through the middle part of valve body (1)
Stretch into inlet chamber (1a), spring (3) is provided between described piston (2) and valve body (1)；The front end of described valve body (1)
Protecgulum (4) is fixed with, the intake interface (5) for being provided centrally with air inlet (5a), described valve body are equipped with the protecgulum (4)
(1) rear end is fixed with bonnet (6), and the outlet interface (7) for being provided centrally with gas outlet (7a), institute are equipped with the bonnet (6)
It is provided between the protecgulum (4) and valve body (1) stated on sealing pad assembly (8), the sealing pad assembly (8) and is located at piston (2) front portion
Periphery periphery on offer air passing hole (8a).
2. a kind of natural gas engine pressure maintaining valve according to claim 1, it is characterized in that：The rear portion of described piston (2)
Periphery is provided with seal groove (21), and piston packing (22) is provided with the seal groove (21).
3. a kind of natural gas engine pressure maintaining valve according to claim 2, it is characterized in that：The middle part of described valve body (1)
A dust ring (11) is equipped with, the outer wall that the inner ring of the dust ring (11) is anterior with piston (2) is affixed cooperation.
4. a kind of natural gas engine pressure maintaining valve according to claim 3, it is characterized in that：The rear portion of described piston (2)
Center is formed with an enlarged cavity (2b), and described enlarged cavity (2b) is connected with crossing the rear end of gas passage (2a).
5. a kind of natural gas engine pressure maintaining valve according to claim 4, it is characterized in that：The bottom of described valve body (1)
Be provided with an exhaust joint (9), be provided with steam vent (9a) on the exhaust joint (9), described steam vent (9a) with it is described steady
Pressure chamber (1b) is connected.
6. a kind of natural gas engine pressure maintaining valve according to claim 5, it is characterized in that：Described protecgulum (4) with it is described
Preceding sealing ring (41) is provided between valve body (1), rear sealing ring is provided between described bonnet (6) and the valve body (1)
(61)。
7. a kind of natural gas engine pressure maintaining valve according to claim 6, it is characterized in that：It is fixed on described bonnet (6)
Have and be provided with fixing hole (12a) in mounting bracket (12), described mounting bracket (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720345920.6U CN206592603U (en) | 2017-04-05 | 2017-04-05 | A kind of natural gas engine pressure maintaining valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720345920.6U CN206592603U (en) | 2017-04-05 | 2017-04-05 | A kind of natural gas engine pressure maintaining valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206592603U true CN206592603U (en) | 2017-10-27 |
Family
ID=60122465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720345920.6U Expired - Fee Related CN206592603U (en) | 2017-04-05 | 2017-04-05 | A kind of natural gas engine pressure maintaining valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206592603U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676514A (en) * | 2017-10-18 | 2018-02-09 | 华中科技大学 | A kind of complete deep supervoltage sea water flow speed control valve in sea |
| CN109812609A (en) * | 2019-04-02 | 2019-05-28 | 广东长青（集团）股份有限公司 | A kind of combustion gas connector with pressure stabilizing and super stream defencive function |
| CN112032383A (en) * | 2020-09-24 | 2020-12-04 | 上海百图低温阀门有限公司 | Straight-through copper pressure valve |
| CN112648522A (en) * | 2020-11-05 | 2021-04-13 | 中国航发沈阳发动机研究所 | Pneumatic servo control valve of dustproof aero-engine lubricating system |
-
2017
- 2017-04-05 CN CN201720345920.6U patent/CN206592603U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676514A (en) * | 2017-10-18 | 2018-02-09 | 华中科技大学 | A kind of complete deep supervoltage sea water flow speed control valve in sea |
| CN107676514B (en) * | 2017-10-18 | 2018-11-30 | 华中科技大学 | A kind of deep supervoltage sea water speed governing valve in full sea |
| CN109812609A (en) * | 2019-04-02 | 2019-05-28 | 广东长青（集团）股份有限公司 | A kind of combustion gas connector with pressure stabilizing and super stream defencive function |
| CN109812609B (en) * | 2019-04-02 | 2023-09-29 | 长青热能科技(中山)有限公司 | Gas connector with voltage stabilization and overcurrent protection functions |
| CN112032383A (en) * | 2020-09-24 | 2020-12-04 | 上海百图低温阀门有限公司 | Straight-through copper pressure valve |
| CN112648522A (en) * | 2020-11-05 | 2021-04-13 | 中国航发沈阳发动机研究所 | Pneumatic servo control valve of dustproof aero-engine lubricating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |