CN203702373U - Pressure reducer of gas-fueled vehicle - Google Patents
Pressure reducer of gas-fueled vehicle Download PDFInfo
- Publication number
- CN203702373U CN203702373U CN201420037191.4U CN201420037191U CN203702373U CN 203702373 U CN203702373 U CN 203702373U CN 201420037191 U CN201420037191 U CN 201420037191U CN 203702373 U CN203702373 U CN 203702373U
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- China
- Prior art keywords
- level
- pressure
- spring
- gas
- chamber
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- Expired - Lifetime
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- 239000003638 chemical reducing agent Substances 0.000 title abstract 4
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000005476 soldering Methods 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 22
- 230000006837 decompression Effects 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229920005558 epichlorohydrin rubber Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- 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
- Fluid-Driven Valves (AREA)
Abstract
The utility model discloses a pressure reducer of a gas-fueled vehicle. The pressure reducer of the gas-fueled vehicle comprises a shell provided with a first-level pressure reducing chamber and a second-level pressure reducing chamber. The first-level pressure reducing chamber is arranged on the lower portion of the second-level pressure reducing chamber. The shell is provided with an electromagnetic pilot control assembly, a high-pressure inlet, a temperature compensation liquid inlet, a safety valve, a pressure compensation port and a low-pressure port. An air pressure channel is formed between the first-level pressure reducing chamber and the second-level pressure reducing chamber. A valve needle pressing base is arranged on the air pressure channel. The first-level pressure reducing chamber is provided with a transmission rod, a first-level membrane and a first-level spring inside. A valve needle, a second-level membrane, a second-level pre-pressing spring and a pressure compensation spring are arranged in the second-level pressure reducing chamber. The pressure reducer of the gas-fueled vehicle has the advantages of being simple in structure, attractive in appearance, high in accuracy and capable of greatly improving the quality and reliability of products of the same type.
Description
Technical field
The utility model relates to decompressor technical field, especially relates to a kind of gas-fueled vehicles decompressor.
Background technique
The engineering completion of transferring natural gas from the west to the east along with " the longest natural gas line in the world " under national support, gas-fueled vehicles and gasoline automobile relatively fuel cost save 50%, exhaust emissions reduces 70%, have the double dominant of economic environmental protection concurrently, make domestic gas combustion automobile industry present the situation of explosive growth in recent years.
Gas-fueled vehicles decompressor is a vitals of gas-fueled vehicles, its quality will directly have influence on the power performance of automobile, it mainly plays decompression and voltage stabilizing in gas-fueled vehicles, therefore, by utilizing decompressor, the compressed natural gas pressure of 20MPa left and right can be dropped to 0.8-2.5KPa and enter mixer, to be mixed into cylinder with air, because CNG gas pressure in gas cylinder is along with fuel fills and use continuous variation, keep more stable air fuel ratio control, also require no matter how pressure of the inside of a bottle changes, it is basicly stable that pressure reducing regulator also should guarantee to enter the gaseous-pressure of mixer, thereby realize the effect of decompression and voltage stabilizing.The principle of CNG reduction valve decompression is throttling, when gas flow is crossed the gap between core and valve seat, pressure reduces, reach the object of decompression, the principle of CNG reduction valve voltage stabilizing is equilibrium of forces, because the stroke of spring is set, reach balance, the pressure of room of outlet must be followed spring force balance, in the time of inlet pressure and flow variation, utilize the pressure balance of spring force and room of outlet to keep outlet pressure substantially constant, this is an equilibrium process, be not to complete moment, because spring, moving core etc. has certain quality, in movement, there is friction with some other parts such as valve bodies.Because the spring of the second depressurized chamber of existing CNG reduction valve frequently compresses, use after a period of time, spring can not reach the requirement of service behaviour, and its working life is shorter.
Model utility content
The deficiency existing for above-mentioned prior art, the purpose of this utility model is to provide a kind of gas-fueled vehicles decompressor, it is arranged with pressure compensation spring in the loaded spring of second depressurized chamber, and improved more than 50% the working life of working zone, second depressurized chamber.
To achieve these goals, the technological scheme that the utility model adopts is:
A kind of gas-fueled vehicles decompressor, comprise the housing that is provided with one-level underpressure chamber and second depressurized chamber, the bottom of second depressurized chamber is located in one-level underpressure chamber, housing is provided with electromagnetic pilot control unit, high pressure entry, temperature correction liquid entrance, safety valve, pressure compensation interface, pressure regulates mouth and low-voltage interface, between one-level underpressure chamber and second depressurized chamber, be provided with pressure channel, pressure channel is provided with needle wedge, one-level is provided with drive link in underpressure chamber, first diaphragm and one-level spring, one-level spring is located at the lower end of first diaphragm, drive link one end is connected with first diaphragm, the other end is connected with high pressure entry, the indoor needle that is provided with of second depressurized, secondary diaphragm, secondary prepressing spring and pressure compensation spring, the bottom of needle is located in described needle wedge, the upper end of needle is connected with secondary diaphragm, secondary prepressing spring is located at the upper end of secondary diaphragm, in secondary prepressing spring, be also sheathed on pressure compensation spring.
Wherein, described safety valve is provided with pipe joint, and the outboard end of this pipe joint is provided with snap ring.The pilot head sleeve pipe of described electromagnetic pilot control unit is connected with bonnet silver soldering.Described needle wedge is provided with tapered joint discharge orifice, and described needle is provided with " D " shape seal ring coordinating with described tapered joint discharge orifice.
Adopt after technique scheme, the advantage that compared to the prior art the utility model had is:
Because second depressurized chamber is the final decompression of CNG decompressor and pressure-stabilizing section, so have relatively high expectations to working stability in this region, existing CNG decompressor is using the later stage, due to the frequent compression of loaded spring, can not reach the requirement of service behaviour, and the utility model has increased pressure compensation spring at the secondary prepressing spring inner of second depressurized chamber, pressure compensation spring can assist secondary prepressing spring to work on, and increases after tested pressure compensation spring and can make improve more than 50% the working life of second depressurized chamber region.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that partial structurtes schematic diagram is looked on a left side of the present utility model.
In figure, 1: high pressure entry; 2: temperature correction liquid entrance; 3: one-level underpressure chamber; 4: safety valve; 5: electromagnetic pilot control unit; 6: second depressurized chamber; 7: pressure regulates mouth; 8: pressure compensation interface; 9: low-voltage interface; 10: housing; 11: secondary prepressing spring; 12: pressure compensation spring; 13: secondary diaphragm; 14: needle wedge; 15: needle; 16: " D " shape seal ring; 17: pilot head sleeve pipe; 18: bonnet; 19: drive link; 20: first diaphragm; 21: one-level spring; 22: snap ring.
Embodiment
The following stated is only preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
Embodiment, is shown in shown in Fig. 1 and Fig. 2.
A kind of gas-fueled vehicles decompressor, comprise the housing 10 that is provided with one-level underpressure chamber 3 and second depressurized chamber 6, the bottom of second depressurized chamber 6 is located in one-level underpressure chamber 3, housing 10 is provided with electromagnetic pilot control unit 5, high pressure entry 1, temperature correction liquid entrance 2, safety valve 4, pressure compensation interface 8, pressure regulates mouth 7 and low-voltage interface 9, between one-level underpressure chamber 3 and second depressurized chamber 6, be provided with pressure channel, pressure channel is provided with needle wedge 14, in one-level underpressure chamber 3, be provided with drive link 19, first diaphragm 20 and one-level spring 21, one-level spring 21 is located at the lower end of first diaphragm 20, drive link 19 one end are connected with first diaphragm 20, the other end is connected with high pressure entry 1, in second depressurized chamber 6, be provided with needle 15, secondary diaphragm 13, secondary prepressing spring 11 and pressure compensation spring 12, the bottom of needle 15 is located in described needle wedge 14, the upper end of needle 15 is connected with secondary diaphragm 13, secondary prepressing spring 11 is located at the upper end of secondary diaphragm 13, in secondary prepressing spring 11, be also sheathed on pressure compensation spring 12.
The working principle of one-level reduced pressure zone is, the CNG gas flowing out from air cylinder relies on the pressure of self to open one-level valve, flow into one-level underpressure chamber 3 from one-level flow nipple, here one-level valve and one-level flow nipple are high pressure entry 1 described in the utility model, in this process, the pressure of CNG gas is significantly reduced, along with amount of gas in one-level underpressure chamber 3 is on the increase, room pressure constantly raises, in the time that pressure rise arrives certain value, first diaphragm 20 protrudes downwards, compressing one-level spring 21, drive moving core action by drive link 19, one-level valve opening is reduced, reduce entering of CNG gas, along with the CNG gas in one-level underpressure chamber 3 constantly enters second depressurized chamber 6, air pressure in one-level underpressure chamber 3 reduces, in the time of the near a certain value of pressure, under the resilient force of one-level spring 21, upwards jack-up first diaphragm 20, drive link 19 discharges, moving core resets gradually, one-level valve opening is increased, CNG gas flows into again one-level underpressure chamber 3, the open and close of one-level valve are by the determining positions of first diaphragm 20, and the position of first diaphragm 20 is subject to the pressure control of one-level underpressure chamber 3.
Needle wedge 14 is provided with tapered joint discharge orifice, and described needle 15 is provided with " D " shape seal ring 16 coordinating with described tapered joint discharge orifice.Needle 15 belongs to vital part in CNG decompressor, and described " D " shape seal ring 16 adopts epichlorohydrin rubber to make, and epichlorohydrin rubber serviceability temperature is-40 ℃ to 140 degrees Celsius, resistance to fuel oil, and resistance to alkanes, ageing-resistant.The fillet that utilizes " D " shape seal ring 16 with seal the coordinating of the conical surface of tapered joint discharge orifice, thereby can bring into play better more stable sealing effect.
The working principle in 6 regions, second depressurized chamber is, CNG gas through preliminary decompression in one-level underpressure chamber 3 enters second depressurized chamber 6 through pressure channel, wherein electromagnetic pilot control unit 5 is for controlling the keying of pressure channel, now CNG gas pressure further reduces, make it approach negative pressure, due to the effect of throttle orifice, pressure is further reduced.Along with the gas in second depressurized chamber 6 increases, in the time that second depressurized chamber 6 internal pressures exceed the pretightening force of secondary prepressing spring 11, secondary diaphragm 13 raises up, compressing secondary prepressing spring 11, and drive needle 15 to move by secondary diaphragm 13, throttle orifice aperture is reduced, reduce the inlet of CNG gas, along with the CNG gas in second depressurized chamber 6 constantly enters low-voltage interface 9, air pressure in second depressurized chamber 6 reduces, in the time that pressure is less than secondary prepressing spring 11 pretightening force, under the resilient force of secondary prepressing spring 11, secondary diaphragm 13 is depressed, drive needle 15 to move by secondary diaphragm 13, throttle orifice aperture is increased, the CNG gas flow that enters second depressurized chamber 6 starts again to increase.The aperture of throttle orifice again the concavo-convex of secondary diaphragm 13 is controlled, and the concavo-convex of secondary diaphragm 13 determined jointly by second depressurized chamber 6CNG gas pressure and secondary prepressing spring 11.Through the one-level underpressure chamber 3 of CNG decompressor and decompression and the voltage stabilizing of second depressurized chamber 6, CNG gas again by low tension outlet through output tube to sparger.
CNG decompressor is using the later stage, due to the frequent compression of loaded spring, can not reach the requirement of service behaviour, the utility model has increased pressure compensation spring 12 in secondary prepressing spring 11 inside of second depressurized chamber 6, pressure compensation spring 12 can assist secondary prepressing spring 11 to work on, and increases after tested pressure compensation spring 12 and can make improve more than 50% the working life in 6 regions, second depressurized chamber.
Safety valve 4 is provided with pipe joint, and the outboard end of this pipe joint is provided with snap ring 22.Safety valve 4 is under abnormal conditions, in the time of CNG decompressor internal pressure superpressure, start, utilize the pipe joint on safety valve 4 that sebific duct is installed, and utilize snap ring 22 use clips to fix, CNG gas can be exported to outside engine compartment by sebific duct, prevent that CNG Leakage Gas is in body inside, cabin, cause on fire, thereby evade potential safety hazard.
The pilot head sleeve pipe 17 of electromagnetic pilot control unit 5 is connected with bonnet 18 silver soldering.Conventional electromagnetic pilot head casing tube 17 is to tighten with screw thread, then adds screw thread glue and fix.And that this structure is born pressure is less, generally in 8MPa left and right, in addition screw thread glue is easily loosening under long-term shock of moving iron core being subject in electromagnetic pilot head casing tube 17, very easily cause CNG Leakage Gas, when serious, can cause on fire, threaten user's property and life safety, and the electromagnetic pilot head casing tube 17 of this CNG decompressor adopts silver soldering to connect, more than strength can reach 12MPa, and in using process, can not cause soldering point become flexible and come off, thereby far exceed like product on the market on safety and stability.
In the time of this CNG of design decompressor product, its topology layout and shape have been carried out to abundant investigation, and the changing value of the gas pressure in input motor process is carried out to accurate determination and analysis, mainly to reduce pressure in gap decompression to one-level pressure relief valve and the gap of second depressurized valve, and vacuum compensation calculates, can reach high level of the same trade, and the component that are mainly subject to load have been carried out to strength check, make the material of selecting meet requirement of strength.This CNG decompressor has simple in structure, specious, and the feature that precision is high can provide quality and the reliability of like product greatly.
The above is only preferred embodiments of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (4)
1. a gas-fueled vehicles decompressor, it is characterized in that: comprise the housing (10) that is provided with one-level underpressure chamber (3) and second depressurized chamber (6), the bottom of second depressurized chamber (6) is located in one-level underpressure chamber (3), housing (10) is provided with electromagnetic pilot control unit (5), high pressure entry (1), temperature correction liquid entrance (2), safety valve (4), pressure compensation interface (8), pressure regulates mouthful (7) and a low-voltage interface (9), between one-level underpressure chamber (3) and second depressurized chamber (6), be provided with pressure channel, pressure channel is provided with needle wedge (14), in one-level underpressure chamber (3), be provided with drive link (19), first diaphragm (20) and one-level spring (21), one-level spring (21) is located at the lower end of first diaphragm (20), drive link (19) one end is connected with first diaphragm (20), the other end is connected with high pressure entry (1), in second depressurized chamber (6), be provided with needle (15), secondary diaphragm (13), secondary prepressing spring (11) and pressure compensation spring (12), the bottom of needle (15) is located in described needle wedge (14), the upper end of needle (15) is connected with secondary diaphragm (13), secondary prepressing spring (11) is located at the upper end of secondary diaphragm (13), in secondary prepressing spring (11), be also sheathed on pressure compensation spring (12).
2. gas-fueled vehicles decompressor according to claim 1, is characterized in that: described safety valve (4) is provided with pipe joint, and the outboard end of this pipe joint is provided with snap ring (22).
3. gas-fueled vehicles decompressor according to claim 1, is characterized in that: the pilot head sleeve pipe (17) of described electromagnetic pilot control unit (5) is connected with bonnet (18) silver soldering.
4. gas-fueled vehicles decompressor according to claim 1, it is characterized in that: described needle wedge (14) is provided with tapered joint discharge orifice, described needle (15) is provided with " D " shape seal ring (16) coordinating with described tapered joint discharge orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420037191.4U CN203702373U (en) | 2014-01-20 | 2014-01-20 | Pressure reducer of gas-fueled vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420037191.4U CN203702373U (en) | 2014-01-20 | 2014-01-20 | Pressure reducer of gas-fueled vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702373U true CN203702373U (en) | 2014-07-09 |
Family
ID=51052826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420037191.4U Expired - Lifetime CN203702373U (en) | 2014-01-20 | 2014-01-20 | Pressure reducer of gas-fueled vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702373U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033880A (en) * | 2021-11-04 | 2022-02-11 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen pressure reducing valve |
| WO2023035051A1 (en) * | 2021-09-10 | 2023-03-16 | Guimaraes Alexsandro Ribeiro | Cng management device |
-
2014
- 2014-01-20 CN CN201420037191.4U patent/CN203702373U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035051A1 (en) * | 2021-09-10 | 2023-03-16 | Guimaraes Alexsandro Ribeiro | Cng management device |
| CN114033880A (en) * | 2021-11-04 | 2022-02-11 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen pressure reducing valve |
| CN114033880B (en) * | 2021-11-04 | 2024-02-09 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen pressure reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Yongan road Xikou Town Industrial Park Fenghua District Zhejiang city of Ningbo province No. 7 315500 Patentee after: NINGBO ANLITE MACHINERY Co.,Ltd. Address before: 315500 Yongan road Zhejiang city Fenghua province Xikou Industrial Park No. 7 Patentee before: FENGHUA ANLITE MACHINERY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |