CN203441636U - Fuel gas pressure reducing valve - Google Patents
Fuel gas pressure reducing valve Download PDFInfo
- Publication number
- CN203441636U CN203441636U CN201320313763.2U CN201320313763U CN203441636U CN 203441636 U CN203441636 U CN 203441636U CN 201320313763 U CN201320313763 U CN 201320313763U CN 203441636 U CN203441636 U CN 203441636U
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- CN
- China
- Prior art keywords
- lever
- pressure
- diaphragm
- reducing valve
- 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.)
- Expired - Lifetime
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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
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model relates to a fuel gas pressure reducing valve. The fuel gas pressure reducing valve comprises an upper cover, a lower cover and a diaphragm, wherein the diaphragm is arranged on the joint surface of the upper cover and the lower cover, an air outlet cavity is encircled by the diaphragm and the upper cover, a back pressure cavity is encircled by the diaphragm and the lower cover, the upper cover is provided with an air inlet, the air outlet cavity and a pressure regulation spring, a sealing gasket is arranged on the lower end of the air inlet; an air balance hole is arranged on the lower cover, so that the back pressure cavity is communicated with the atmosphere; a lever is arranged in the air outlet cavity, one end of the lever is connected with the diaphragm, the lower end of the pressure regulation spring is connected with the lever between one end of the lever and a lever shaft, and the sealing gasket is connected with the other end of the lever. Other pressure reducing valves or electromagnetic valves are not needed, and the fuel gas pressure reducing valve can be directly connected to natural gas pipelines.
Description
Technical field
The utility model relates to a kind of reduction valve, particularly a kind of gas pressure-reducing valve for gas engine.
Background technique
The reduction valve that existing gas engine is used needs solenoid valve to assist the switching of controlling combustion gas, and is only applicable to high-pressure air source, uses solenoid valve that cost is increased.
On market, lack and a kind ofly can be applicable to the gas pressure-reducing valve that low-pressure gas source or high low pressure source of the gas all can be used.
The reduction valve that the utility model relates to, can judge when engine misses automatic closing gas source.Pipe natural gas belongs to low-pressure gas source, and along with it is universal, the reduction valve that the utility model relates to, can directly use in gas engine, no longer needs other reduction valve and solenoid valve.For high-pressure air source, as liquefied petroleum gas (LPG) etc., only need to connect a common reduction valve at high-pressure air source outlet chamber, go out atmospheric pressure and reach the related reduction valve requirement of the utility model, this common reduction valve is universal, and high-pressure air source user can conveniently buy in market, and cost is lower.
Model utility content
The purpose of this utility model is to overcome the defect of prior art, and a kind of other reduction valve or solenoid valve of not relying on is provided, and can be directly connected in the gas pressure-reducing valve of natural gas line.
The technological scheme that realizes the utility model object is: a kind of gas pressure-reducing valve, comprise upper cover, lower cover and diaphragm, described diaphragm arrangement is on upper cover and lower cover mating face, diaphragm and upper cover surround outlet chamber, diaphragm and lower cover surround back pressure cavity, on described, cover and be provided with suction port, outlet chamber and pressure adjusting spring, described suction port lower end is provided with sealing gasket; Under described, cover and be provided with air balance hole, back pressure cavity and atmosphere are communicated with; In described outlet chamber, be provided with a lever, one end of lever is connected with diaphragm, and the lower end of described pressure adjusting spring is connected on one end and the lever between lever shaft of lever, and described sealing gasket is connected in the other end of lever.
As further improvement of the utility model, described diaphragm by film and the clamping plate that clamp up and down film form, one end of described lever is connected with clamping plate.
As further improvement of the utility model, cover under described and be provided with start button, on start button, with Returnning spring, button touches diaphragm and moves up.
As further improvement of the utility model, on described pressure adjusting spring, be also provided with adjusting knob, adjusting knob comprises top adjusting knob and below adjusting knob.After below adjusting knob sets, top adjusting knob screws, and two screw pairs guarantee that to top anti-loose structure adjusting knob is not loosening, guarantee that the setting value of pressure adjusting spring does not fluctuate.
As further improvement of the utility model, the outlet side of described outlet chamber is provided with regulator bolts, size that can accurate adjustment outlet side bore, and then adjust tolerance and outlet chamber pressure.
As further improvement of the utility model, described upper cover is provided with mounting hole, can easily gas pressure-reducing valve be fixed on carrier.
As further improvement of the utility model, described suction port upper end is connected with common reduction valve, for high-pressure air source is down to low pressure, makes it go out the suction pressure requirement that atmospheric pressure meets described gas pressure-reducing valve.Common reduction valve is existing reduction valve on market.
The utility model utilizes lever principle, when outlet chamber is negative pressure, back pressure cavity is current barometric pressure, film is together with clamping plate and connecting rod top lever up, the moment of its generation deducts the moment that pressure adjusting spring produces, be greater than the moment that suction port combustion gas produces, sealing gasket is down motion, and suction port combustion gas enters outlet chamber.When outlet chamber is current barometric pressure, lever principle is the same, and the combustion gas of suction port is closed.The pressure of outlet chamber is determined by engine piston motion, during piston movement, is negative pressure, is current atmospheric pressure during stop motion.
the beneficial effects of the utility model are:
1. the gas of the utility model inlet end is low-pressure gas source, and pipe natural gas is universal at present, and pipe natural gas belongs to low-pressure gas source, the utility model can directly be used pipe natural gas, do not rely on other reduction valve and solenoid valve, effectively save cost, easy to use.
2. when using high-pressure air source, during as liquefied petroleum gas (LPG), only need to first connect a common reduction valve, make out atmospheric pressure meet the related reduction valve suction pressure requirement of the utility model, described common reduction valve is universal, and high-pressure air source user can conveniently buy in market, and cost is lower.
3. adopt and start enriching button, during startup, can enter cylinder by reinforced fuel gas, make motor be easier to start at startup time ratio.
4. adopt clamping plate film is clamped and shape, can effectively transmit air pressure.
5. be provided with two adjusting knobs, after below adjusting knob sets, top adjusting knob screws, and two screw pairs guarantee that to top anti-loose structure structure adjusting knob is not loosening, guarantee that the setting value of pressure adjusting spring does not fluctuate.
6. be provided with the air balance hole of back pressure cavity, can guarantee that the pressure of back pressure cavity is equal to current atmospheric pressure.
7. at outlet chamber, be provided with regulator bolts, can accurate adjustment outlet side gas output and outlet chamber pressure.
8. upper cover is provided with mounting hole, can be easily installed on carrier.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment 1 structural representation;
Fig. 2 is the utility model embodiment 1 superstructure schematic diagram.
Number in the figure explanation:
1. start enriching button, 2. lower cover, 3. air balance hole, 4. diaphragm, 5. outlet side, 6. connecting rod, 7. upper cover, 8. pressure adjusting spring, 9. adjusting knob, 10. suction port upper end, 11. suction ports, 12. lever shafts, 13. rubber gaskets, 14. levers, 15. outlet chambers, 16. back pressure cavity, 17. film clamping plate, 18. Returnning springs, 19. lock bolts, 20. regulator bolts, 21. mounting holes, 22. films, one end of 23. levers, the other end of 24. levers.
Embodiment
Below in conjunction with drawings and Examples, be described further.
Embodiment 1
See Fig. 1, Fig. 2, a kind of gas pressure-reducing valve 100, comprises upper cover 7, lower cover 2 and diaphragm 4, and diaphragm 4 is arranged on the mating face of upper cover 7 and lower cover 2, and upper cover 7 is fixedly connected with by lock bolt 19 with lower cover 2.Diaphragm 4 and upper cover 7 surround outlet chamber 15, and diaphragm 4 and lower cover 2 surround back pressure cavity 16.Upper cover 7 is provided with suction port 11, outlet chamber 15 and pressure adjusting spring 8.Suction port 11 lower ends are provided with sealing gasket 13.Lower cover 2 is provided with air balance hole 3, and back pressure cavity 16 and atmosphere are communicated with.Diaphragm 4 is comprised of film 22 and clamping plate 17.In outlet chamber 15, be provided with a lever 14, one end of lever 14 is connected with clamping plate 17 by connecting rod 6, and the lower end of pressure adjusting spring 8 is connected on one end 23 and the lever 14 between lever shaft 12 of lever, and sealing gasket 13 is connected in the other end 24 of lever.Lower cover 2 is provided with start button 1, and on start button 1, with Returnning spring 18, start button 1 touches diaphragm 4 and moves up.On pressure adjusting spring 8, be also provided with adjusting knob 9, adjusting knob 9 is comprised of top adjusting knob and below adjusting knob.After below adjusting knob sets, top adjusting knob screws, and two screw pairs guarantee that to top anti-loose structure adjusting knob is not loosening, guarantee that the setting value of pressure adjusting spring does not fluctuate.
Upper cover 7 is provided with outlet chamber 15 and is provided with regulator bolts 20, size that can accurate adjustment outlet side 5 bores, and then adjust tolerance and outlet chamber pressure.Upper cover 7 is also provided with mounting hole 21, can easily gas pressure-reducing valve 100 be fixed on carrier.
The utility model utilizes lever principle, when outlet chamber 15 is negative pressure, back pressure cavity 16 is current barometric pressure, diaphragm 4 and connecting rod 6 be top lever 14 up, the moment of its generation deducts the moment that pressure adjusting spring 8 produces, be greater than the moment that suction port 11 combustion gas produce, 13 down motions of rubber gasket, suction port 11 combustion gas enter outlet chamber 15.When outlet chamber 15 is current barometric pressure, lever principle is the same, and the combustion gas of suction port 11 is closed.The pressure of outlet chamber 15 is determined by engine piston motion, during piston movement, is negative pressure, is current atmospheric pressure during stop motion.
The working procedure of gas pressure-reducing valve 100 is as follows:
1. during engine start, first press the several seconds and start enriching button 1, opened suction port 11, allow combustion gas enter outlet chamber 15, then enter engine cylinder combustion acting.
2. after engine start, piston cycle acting, does not stop to suck empty combustion mixed gas, makes outlet chamber 15 for negative pressure.Because air balance hole 3 can regulate the pressure of back pressure cavity 16 automatically, it is current barometric pressure, because the pressure of back pressure cavity 16 is greater than the pressure of outlet chamber 15, make diaphragm 4, film clamping plate 17 and connecting rod 6 up move, lever 14 right-hand members are had to the thrust making progress, moment when this thrust generation, deduct the moment that 8 pairs of levers of pressure adjusting spring 14 produce, be greater than the moment that suction port 11 combustion gas produce lever 14, lever 14 is rotated counterclockwise along lever shaft 12, now rubber gasket 13 is pushed open by suction port 11 places combustion gas, and constantly enter outlet chamber 15, through outlet side 5, enter again cylinder circular work.
After engine misses, piston stops doing power, and no longer sucks empty combustion mixed gas, and the pressure that makes outlet chamber 15 is current barometric pressure, and as from the foregoing, outlet chamber 15 and back pressure cavity 16 pressure are equal, and 6 pairs of lever 14 right-hand members of connecting rod do not produce power.The moment that 8 pairs of levers of pressure adjusting spring 14 produce is greater than the moment that suction port 11 combustion gas produce lever 14, and lever 14 turns clockwise along lever shaft 12, and rubber gasket 13 is blocked the combustion gas of suction port 11.
When the low-pressure gas source such as combustion gas is pipe natural gas, directly use the gas pressure-reducing valve 100 of the present embodiment; When the high-pressure air source such as combustion gas is liquefied petroleum gas (LPG), need to first reduce pressure, when suction pressure meets the utility model and relates to reduction valve requirement suction pressure, the gas pressure-reducing valve 100 of the present embodiment also comprises a common reduction valve, is connected to the upper end of suction port 10.
Claims (7)
1. a gas pressure-reducing valve, comprise upper cover, lower cover and diaphragm, it is characterized in that, described diaphragm arrangement is on upper cover and lower cover mating face, diaphragm and upper cover surround outlet chamber, diaphragm and lower cover surround back pressure cavity, cover on described and are provided with suction port, outlet chamber and pressure adjusting spring, and described suction port lower end is provided with sealing gasket; Under described, cover and be provided with air balance hole, back pressure cavity and atmosphere are communicated with; In described outlet chamber, be provided with a lever, one end of lever is connected with diaphragm, and the lower end of described pressure adjusting spring is connected on one end and the lever between lever shaft of lever, and described sealing gasket is connected in the other end of lever.
2. gas pressure-reducing valve according to claim 1, is characterized in that, described diaphragm by film and the clamping plate that clamp up and down film form, one end of described lever is connected with clamping plate.
3. gas pressure-reducing valve according to claim 1, is characterized in that, covers under described and is provided with start button, and on start button, with Returnning spring, button touches diaphragm and moves up.
4. gas pressure-reducing valve according to claim 1, is characterized in that, described pressure adjusting spring is comprised of top adjusting knob and below adjusting knob.
5. gas pressure-reducing valve according to claim 1, is characterized in that, described upper cover is provided with mounting hole.
6. gas pressure-reducing valve according to claim 1, is characterized in that, described suction port upper end is connected with reduction valve.
7. gas pressure-reducing valve according to claim 1, is characterized in that, the outlet side of described outlet chamber is provided with regulator bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320313763.2U CN203441636U (en) | 2013-05-31 | 2013-05-31 | Fuel gas pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320313763.2U CN203441636U (en) | 2013-05-31 | 2013-05-31 | Fuel gas pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203441636U true CN203441636U (en) | 2014-02-19 |
Family
ID=50092695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320313763.2U Expired - Lifetime CN203441636U (en) | 2013-05-31 | 2013-05-31 | Fuel gas pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203441636U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696112A (en) * | 2015-03-18 | 2015-06-10 | 盐城诺维特机电科技有限公司 | Pressure reducing valve based on liquefied petroleum gas and natural gas dual-fuel engine |
| CN112963595A (en) * | 2021-01-29 | 2021-06-15 | 重庆翔中燃气设备有限公司 | Gas negative pressure valve and assembling method thereof |
-
2013
- 2013-05-31 CN CN201320313763.2U patent/CN203441636U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696112A (en) * | 2015-03-18 | 2015-06-10 | 盐城诺维特机电科技有限公司 | Pressure reducing valve based on liquefied petroleum gas and natural gas dual-fuel engine |
| CN112963595A (en) * | 2021-01-29 | 2021-06-15 | 重庆翔中燃气设备有限公司 | Gas negative pressure valve and assembling method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |