CN1434232A - Pressure reducing regulator for LPG - Google Patents
Pressure reducing regulator for LPG Download PDFInfo
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- CN1434232A CN1434232A CN 03111145 CN03111145A CN1434232A CN 1434232 A CN1434232 A CN 1434232A CN 03111145 CN03111145 CN 03111145 CN 03111145 A CN03111145 A CN 03111145A CN 1434232 A CN1434232 A CN 1434232A
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- pressure
- regulation
- lpg
- regulating
- decompression
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Abstract
The liquefied petroleum gas pressure-reducing pressure regulator includes shell body, pressure-regulating film, pressure-regulating lever, supporting shaft, pressure-regulating push bar, pressure-regulating sleeve, pressure regulator cover, pressure-regulating spring and vacuum regulation connector. The pressure-regulator cover and its shell body are separated into upper and lower two cavities by means of pressure-regulating film, the upper cavity is vacuum pressure-regulating cavity communicated with air inlet pipe behind throttle valve of the engine by means of vacuum regulation connector, and its lower cavity is gas cavity, the pressure-regulating sleeve is mounted on one side of its shell body near by air inlet, the sealing gasket is placed in the pressure-regulating sleeve.
Description
Technical field
The present invention relates to a kind of liquefied petroleum gas (LPG) decompression pressure governor, particularly relate to decompression of electric-controlled injection liquified petroleum gas engine and pressure regulation joint device.
Background technique
It is to solve a kind of key measure that engine exhaust pollutes that motor adopts the electric-controlled injection gaseous fuel.Utilize the electric-controlled injection technology to add using gases fuel, can make the discharging of motor and car load satisfy European II emission standard fully.Yet, traditional liquefied petroleum gas (LPG) decompressor, though be single-stage or multistage, all exist and the pressure of liquefied petroleum gas (LPG) can only be reduced to some values, and can not change and the effect of change jet pressure along with the degree of vacuum of throttle valve body back, therefore, will appear under the situation of identical jet pressure and injection pulse width, because the degree of vacuum behind the throttle valve body changes, and makes the deterioration phenomenon of emitted dose to the changing inversely of hope.Therefore, make the engine fuel injection amount become the multifactor function of pressure behind injection pulse width and the nozzle and jet pressure, control is got up not only complicated, and, has uncertainty, like this, the result who causes is exactly that a kind of motor just can only be composed by a corresponding specific arteries and veins, similar motor can not be composed by a general arteries and veins, even more serious is same producer like products, also be difficult to make the arteries and veins spectrum of motor all to reach optimum Match, make breadboard achievement in research be difficult to transform into product, this brings very big inconvenience for the product development of liquefied petroleum gas (LPG) motor.On the other hand, because in the past decompressor all has an elementary pressure adjusting spring, make and hang down when making that saturated vapor pressure is lower than certain value that vapor pressure can not overcome the pretightening force of spring, then the cold start-up difficult problem can take place when cylinder for liquefied gas internal cause ambient temperature.
Summary of the invention
The object of the present invention is to provide a kind of liquefied petroleum gas (LPG) decompression pressure governor, the emitted dose that solves the injection of liquefied petroleum gas (LPG) low-pressure gas is subjected to throttle valve body final vacuum degree to influence problem, improves liquified petroleum gas engine cold-starting problem.
For achieving the above object, the present invention is covered by pressure regulator, the pressure regulator housing, pressure regulator housing and decompression pressure-regulating device are formed, it is characterized in that being divided into vacuum pressure regulating cavity and combustion gas chamber at the cavity that described voltage regulation diaphragm 3 is formed pressure regulator lid 15 and pressure regulator housing 2, on the pressure regulator lid 15 the vacuum conditions joint 19 that is communicated with engine air inlet tube is housed, pressure regulator housing 2 is provided with air outlet 1 that communicates with gas nozzle and the suction port 13 that communicates with the combustion gas of gas storage steel cylinder, the pressure regulation push rod 9 that is provided with gasket seal 12 is contained in suction port 13 places by pressure regulation sleeve 10, described decompression pressure-regulating device comprise the pressure regulation pull bar 6 that is fixed on the voltage regulation diaphragm 3 and be contained in vacuum conditions joint 19 and voltage regulation diaphragm 3 between pressure adjusting spring 17, pressure regulation pull bar 6 can be by coupled pressure regulation lever 7 and pressure regulation push rod 9 interactions that can cut out or open suction port 13.
The degree of vacuum of the present invention after with throttle valve body is introduced in the decompressor, make degree of vacuum behind the throttle valve body participate in the decompression adjustment process of jet pressure, make jet pressure promptly be subjected to the control of pressure adjusting spring and diaphragm, influenced by the degree of vacuum behind the throttle valve body, thereby guarantee effect is constant in the gas pressure difference of nozzle ends.Thereby realized that emitted dose only is the single function of the injection pulse width under fixing pressure reduction.Thereby make control oversimplify, control stability improves, and the universal performance of product improves, for Products Development and industrialization provide convenience.Simultaneously, the present invention is integrated with decompressor and pressure regulator, and is simple in structure, with low cost, more helps promotion and application.In addition, the relief spring of decompressor of the present invention is not controlled initial pressure, as long as the pressure in the gas storage steel cylinder is when being higher than atmospheric pressure, decompressor just closes the gas of liquefied petroleum gas (LPG), therefore, enlarge the use minimum temperature restriction of liquefied petroleum gas (LPG), also improved cold starting performance simultaneously.
Description of drawings
Fig. 1 is liquefied petroleum gas (LPG) decompression pressure governor structural representation.
Wherein 1 be the air outlet, 2 for the pressure regulator housing, 3 for voltage regulation diaphragm, 4 for following protecting sheet, 5 for the stroke adjustment nut, 6 for the pressure regulation pull bar, 7 for the pressure regulation lever, 8 for back shaft, 9 for the pressure regulation push rod, 10 for the pressure regulation sleeve, 11 for the axial air outlet of pressure regulation sleeve, 12 for gasket seal, 13 for suction port, 15 for pressure regulator lid 16, for last protecting sheet, 17 for pressure adjusting spring, 18 for look nut, 19 be that vacuum conditions joint, 20 is a locking nut.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing
The invention provides a kind of liquefied petroleum gas (LPG) decompression pressure governor, comprise the air outlet 1 that communicates with gas nozzle, the suction port 13 that communicates with the combustion gas of gas storage steel cylinder, pressure regulator housing 2, voltage regulation diaphragm 3, pressure regulation lever 7, back shaft 8, pressure regulation push rod 9, pressure regulation sleeve 10, axial air outlet 11 on the pressure regulation sleeve 10, gasket seal 12, pressure regulator lid 15, pressure adjusting spring 17, vacuum conditions joint 19, pressure regulator lid 15 is installed in the top of pressure regulator housing 2, be divided into by voltage regulation diaphragm 3 between two bodies, following two chambeies, epicoele is the vacuum pressure regulating cavity, be communicated with by the suction tude behind the throttle valve body of vacuum conditions joint 19 and motor, cavity of resorption is the combustion gas chamber, pressure regulation sleeve 10 is installed in the side of pressure regulator housing 2 near suction port 13, gasket seal 12 places pressure regulation sleeve 10, pressure regulation push rod 9 can slide in pressure regulation sleeve 10, back shaft 8 is fixed on the pressure adjustment housings 2, and pressure regulation lever 7 is connected with back shaft 8 hinges.On the described voltage regulation diaphragm 3 pressure regulation pull bar 6 is installed, pressure regulation pull bar 6 links to each other with described pressure regulation lever 7.
Be provided with look nut 18 at described pressure adjusting spring 17 places and carry out the pressure adjusting.
Pressure regulation pull bar 6 is provided with adjusting nut 5 and 20 pairs of pressure regulation pull bars of locking nut 6 carry out stroke adjustment.
The top of voltage regulation diaphragm 3, bottom are respectively equipped with protecting sheet 16 and following protecting sheet 4.
When the motor proper functioning is blocked with certain flow steam ejection liquefaction petroleum gas or air outlet 1, when the combustion gas cavity pressure is lower than setting pressure, pressurized gas in the liquefied petroleum gas (LPG) gas storage steel cylinder enter the combustion gas chamber through gasket seal 12 and axial air outlet 11, make the combustion gas cavity pressure raise, when pressure is elevated to the power that acts on the voltage regulation diaphragm 3 greater than the pretightening force of pressure adjusting spring 17, diaphragm moves upward and drives pressure regulation pull bar 6 and move upward, pressure regulation pull bar 6 drives pressure regulation lever 7 and is rotated counterclockwise around back shaft 8, promoting pressure regulation push rod 9 is moved to the left and makes gasket seal 12 close air outlet hole on the pressure regulation sleeve 10, combustion gas no longer enters the combustion gas chamber, and the combustion gas cavity pressure will keep certain value.When the combustion gas cavity pressure is lower than setting pressure because of use, the power on the voltage regulation diaphragm 3 of acting on is less than the pretightening force of pressure adjusting spring 17, voltage regulation diaphragm 3 moves down, pressure regulation pull bar 6 loses the control to pressure regulation lever 7, the thrust that acts on pressure regulation push rod 9 and the gasket seal 12 disappears, air outlet hole on the pressure regulation sleeve 10 is opened under the high pressure of left side liquefied petroleum gas (LPG), and combustion gas adds to pressure is risen, thereby has realized the effect of decompression and voltage stabilizing.
When the degree of vacuum behind the throttle valve body changes, be delivered in the vacuum pressure regulating cavity by the pipeline that links to each other with vacuum conditions joint 19.When the degree of vacuum behind the throttle valve body increases, the pressure difference that acts on the voltage regulation diaphragm 3 increases, so only when the combustion gas cavity pressure reduces greatly, be that pressure is when being reduced to a certain degree, the power that acts on the voltage regulation diaphragm 3 could be less than the pretightening force of pressure adjusting spring 17, voltage regulation diaphragm 3 moves down, pressure regulation pull bar 6 loses the control to pressure regulation lever 7, the thrust that acts on pressure regulation push rod 9 and the gasket seal 12 disappears, air outlet hole on the pressure regulation sleeve 10 is opened under the high pressure of left side liquefied petroleum gas (LPG), combustion gas adds to pressure is risen, thereby has realized maintaining decompression and voltage stabilizing function under the low-pressure more.So just make to act on the preceding pressure of nozzle,, thereby realized acting on the stable function of nozzle front and back pressure difference along with the degree of vacuum behind the throttle valve body increases and reduces.
Claims (4)
1. liquefied petroleum gas (LPG) decompression pressure governor, be to cover by pressure regulator, the pressure regulator housing, pressure regulator housing and decompression pressure-regulating device are formed, it is characterized in that being divided into vacuum pressure regulating cavity and combustion gas chamber at the cavity that described voltage regulation diaphragm (3) is formed pressure regulator lid (15) and pressure regulator housing (2), on the pressure regulator lid (15) the vacuum conditions joint (19) that is communicated with engine air inlet tube is housed, pressure regulator housing (2) is provided with air outlet (1) that communicates with gas nozzle and the suction port (13) that communicates with the combustion gas of gas storage steel cylinder, the pressure regulation push rod (9) that is provided with gasket seal (12) is contained in suction port (13) by pressure regulation sleeve (10) and locates, described decompression pressure-regulating device comprise the pressure regulation pull bar (6) that is fixed on the voltage regulation diaphragm (3) and be contained in vacuum conditions joint (19) and voltage regulation diaphragm (3) between pressure adjusting spring (17), pressure regulation pull bar (6) can be by coupled pressure regulation lever (7) and pressure regulation push rod (9) interaction that can cut out or open suction port (13).
2. liquefied petroleum gas (LPG) decompression pressure governor according to claim 1 is characterized in that locating to be provided with look nut (18) at described pressure adjusting spring (17).
3. liquefied petroleum gas (LPG) decompression pressure governor according to claim 1 is characterized in that described pressure regulation pull bar (6) is provided with adjusting nut (5) and locking nut (20).
4. liquefied petroleum gas (LPG) decompression pressure governor according to claim 1 is characterized in that the upper and lower of described voltage regulation diaphragm (3) is respectively equipped with protecting sheet (16) and following protecting sheet (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111145 CN1434232A (en) | 2003-03-08 | 2003-03-08 | Pressure reducing regulator for LPG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111145 CN1434232A (en) | 2003-03-08 | 2003-03-08 | Pressure reducing regulator for LPG |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1434232A true CN1434232A (en) | 2003-08-06 |
Family
ID=27634119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111145 Pending CN1434232A (en) | 2003-03-08 | 2003-03-08 | Pressure reducing regulator for LPG |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1434232A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333192C (en) * | 2005-05-08 | 2007-08-22 | 彭亦程 | Automatic protective pressure regulator for fuel gas |
| WO2012126182A1 (en) * | 2011-03-24 | 2012-09-27 | Fisher Regulators (Shanghai) Co., Ltd. | Balanced axial flow pressure regulator |
| CN103133731A (en) * | 2011-11-30 | 2013-06-05 | 艾默生过程管理调节技术公司 | Slam-shut safety device having a cage |
| CN105090579A (en) * | 2015-09-28 | 2015-11-25 | 李仲伦 | Pipeline fuel gas self-closing valve |
| CN105402454A (en) * | 2015-08-21 | 2016-03-16 | 中国人民解放军国防科学技术大学 | Gas supply adjustment device based on pressure reducers |
| CN105443830A (en) * | 2014-09-03 | 2016-03-30 | 费希尔久安输配设备(成都)有限公司 | Pressure regulator |
| CN106439140A (en) * | 2016-11-24 | 2017-02-22 | 中国计量大学 | Pressure regulating and ejecting integrated device for LPG mixed air |
-
2003
- 2003-03-08 CN CN 03111145 patent/CN1434232A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333192C (en) * | 2005-05-08 | 2007-08-22 | 彭亦程 | Automatic protective pressure regulator for fuel gas |
| WO2012126182A1 (en) * | 2011-03-24 | 2012-09-27 | Fisher Regulators (Shanghai) Co., Ltd. | Balanced axial flow pressure regulator |
| CN103133731A (en) * | 2011-11-30 | 2013-06-05 | 艾默生过程管理调节技术公司 | Slam-shut safety device having a cage |
| CN103133731B (en) * | 2011-11-30 | 2017-11-24 | 艾默生过程管理调节技术公司 | Cut-out safety device with valve bonnet |
| CN105443830A (en) * | 2014-09-03 | 2016-03-30 | 费希尔久安输配设备(成都)有限公司 | Pressure regulator |
| CN105402454A (en) * | 2015-08-21 | 2016-03-16 | 中国人民解放军国防科学技术大学 | Gas supply adjustment device based on pressure reducers |
| CN105402454B (en) * | 2015-08-21 | 2019-12-13 | 中国人民解放军国防科学技术大学 | Gas supply adjusting device based on pressure reducer |
| CN105090579A (en) * | 2015-09-28 | 2015-11-25 | 李仲伦 | Pipeline fuel gas self-closing valve |
| CN106439140A (en) * | 2016-11-24 | 2017-02-22 | 中国计量大学 | Pressure regulating and ejecting integrated device for LPG mixed air |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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