CN100408903C - Gas fuel valve - Google Patents
Gas fuel valve Download PDFInfo
- Publication number
- CN100408903C CN100408903C CNB2006100527674A CN200610052767A CN100408903C CN 100408903 C CN100408903 C CN 100408903C CN B2006100527674 A CNB2006100527674 A CN B2006100527674A CN 200610052767 A CN200610052767 A CN 200610052767A CN 100408903 C CN100408903 C CN 100408903C
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- China
- Prior art keywords
- valve
- chamber
- tracheae
- interim
- outlet chamber
- 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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0675—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever
- G05D16/0683—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane
- G05D16/0688—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane characterised by the form of the obturator
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
- Safety Valves (AREA)
Abstract
A gas valve includes a gas inlet tube, a pressure-relief valve tube and a gassing pressure control seat with a top cover and a base divided into a spring cavity with a pressure spring and a gassing cavity with a gassing tube via an elastic seat. It also includes a temporary gas tube for connecting the gas inlet tube and the gassing cavity, in which is disposed an on-off switch. In the pressure-relief valve tube are disposed a valve port and a spool, at the valve port is set a sealing and the spool includes a head part and a valve stem. The head part of the spool is fitted with the seal ring of the valve port on the elastic seat is disposed a link, which is connected with the valve stem.
Description
(1) technical field
The present invention relates to a kind of gas valve.
(2) background technique
Because the particularity of use occasion, gas valve must have very high Safety performance, and when producing combustion gas leakage or gas output abnormal conditions bigger than normal, gas valve should be closed automatically.
The automatic closing function of gas valve generally adopted electronic switch control when at present, combustion gas leakage or gas output were unusual.Though electronic switch is sensitive, when work, can produce certain electromagnetic induction unavoidably on the one hand, can cause the danger that combustion gas is lighted; Electronic switch is fragile on the other hand, and inner electronic circuit is aging easily, is not durable.Therefore with regard to existing gas valve, its Security is still waiting further raising.
Chinese patent 93244657.4 " in the civil pipeline combustion gas-low-pressure safety valve ", a kind of safety valve that comprises the voltage-controlled seat of giving vent to anger is disclosed, give vent to anger and comprise a spring support in the voltage-controlled seat, spring support can drive lever with the air pressure knee-action in the outlet chamber, and lever drives valve rod again and moves forward and backward in air flue, when the air pressure in outlet chamber is excessive, the piston on the valve rod and the valve port in the place ahead push against, and stop up air flue, play safety effect.When the gas leakage accident takes place when, super stream takes place in the air flue, giving vent to anger speeds up, and the glass marble that is located at the suction port below hikes up because of the airspeed difference of both sides up and down, stops up suction port, a safety effect.
The shortcoming of this documents is: one, hike up need very big draught head for glass marble, when suction pressure hour, pressure difference deficiency is so that therefore in little air inlet depress up and down by the glass marble action for the glass marble that gas leak phenomenon caused, and documents can not play the wheel leakage protective effect; Two, can not adapt to the variation that air inlet is pressed, the just action of superpressure spring support is arranged slightly, close air flue, bring inconvenience.
(3) summary of the invention
In order to overcome the defective of the existing Safety performance of gas valve use electronic switch aspect in the prior art, the invention provides a kind of gas valve of pure mechanical structure, safe and reliable during use.
The technological scheme that the present invention solves its technical problem is:
A kind of gas valve, comprise suction tude, reduction valve pipe and give vent to anger voltage-controlled seat, cover is useful on and connects the combustion gas coupling nut of bottle just on the described suction tude, the described voltage-controlled seat of giving vent to anger comprises loam cake and base, flexible seat between described loam cake and the base, described spring support below is an outlet chamber, the top of described spring support is a spring chamber, hermetic seal between described outlet chamber and the spring chamber, the front end of described reduction valve pipe is communicated with described suction tude, and the rear end of described reduction valve pipe is communicated with described outlet chamber; Described outlet chamber is provided with steam outlet pipe, in the described spring chamber stage clip is arranged, and an end of described stage clip withstands on the described spring support, and the other end of described stage clip withstands on and covers on described;
Spiral shell is provided with air inlet nozzle in the described reduction valve pipe,
Also comprise the interim tracheae that is used to be communicated with described suction tude and outlet chamber, be provided with logical make and break in the described interim tracheae and close; Be provided with valve port and spool in the described reduction valve pipe, described valve port is provided with seal ring, described spool comprise head and along the reduction valve tubular axis to valve rod, the head of described spool is arranged on the place ahead of described valve port and cooperates with the seal ring of described valve port, and the afterbody of described valve rod passes described valve port, stretches in the described outlet chamber; Be equipped with connecting rod on the described spring support, described connecting rod is connected by the linkage that seesaws that moving up and down of connecting rod is changed into valve rod with described valve rod.
Further, linkage is the lever that is articulated in the described outlet chamber, the head bending of described lever, and the head of lever is connected with the afterbody of described valve rod, and the afterbody of described lever is connected with described connecting rod.Perhaps: be equipped with groove on the afterbody of described valve rod and the described connecting rod, described linkage is a gearing, and described gearing is positioned at the rear of described connecting rod, the afterbody of described gear and described valve rod and connecting rod engagement.
Further, be inserted with the valve that is used to cut off interim tracheae tube chamber on the tube wall of described interim tracheae slidably, hermetic seal between the tube wall of described valve and described interim tracheae, described valve is that the logical make and break of interim tracheae is closed.Perhaps: the inwall of described interim tracheae is provided with second valve port, be provided with second spool in the tube chamber of described interim tracheae slidably, the head of described second spool cooperates with described second sealing valve port, and be provided with returning spring between the inwall of the head of this second spool and interim tracheae, the afterbody of described second spool stretches out outside the described interim tracheae, and second valve port cooperates the logical make and break of forming interim tracheae to close with spool.
Further, the shared tube wall of described interim tracheae and described reduction valve pipe, the tube chamber that described logical make and break is closed described interim tracheae is divided into ante-chamber and back cavity, described valve port is divided into preceding air-inlet cavity and back outlet chamber with the tube chamber of described reduction valve pipe, described ante-chamber is communicated with described preceding air-inlet cavity, and described back cavity is communicated with described back outlet chamber.
When also leading to combustion gas, at stage clip connecting rod is pressed down, connecting rod moves after driving valve rod, and this moment, the head of spool was sealed valve port.Connect at the beginning of the combustion gas, the valve port in the reduction valve pipe still is in sealing state.At this moment the logical make and break that at first needs to open interim tracheae is closed, and makes combustion gas to enter in the outlet chamber by interim tracheae.When the combustion gas that enters outlet chamber arrives a certain amount ofly, produces enough big pressure when resisting the pressure of stage clip, air pressure is with spring support jack-up, and connecting rod also rises together in company with spring support.Because connecting rod and valve rod are to couple together by the linkage that seesaws that moving up and down of connecting rod is changed into valve rod, therefore, the rising of connecting rod drives the valve rod reach, this moment, valve port no longer sealed, combustion gas can enter in the outlet chamber by the reduction valve pipe, the logical make and break of closing interim tracheae this moment is closed, and allows combustion gas directly enter into outlet chamber by the reduction valve pipe, makes the interior air pressure of outlet chamber and the pressure of stage clip remain on state of equilibrium.In case produce gas leakage or produce tolerance unusual condition bigger than normal, this moment is because big under the gas output calibration reason condition, thereby the air pressure in the outlet chamber diminishes and can't balance each other with the pressure of stage clip, stage clip presses down spring support once more, connecting rod presses down in company with spring support, thereby the connecting rod that presses down moves the valve port of sealing the reduction valve pipe after driving valve rod, stops the continuation circulation of combustion gas, can effectively stop and reveal and the abnormal interruption ventilation.Can find that it doesn't matter for the size of wheel leakage protective effect of the present invention and suction pressure, even if under little suction pressure, still can close air flue effectively.
The present invention's spiral shell in the reduction valve pipe is provided with air inlet nozzle, form reduction valve, therefore, air-flow had been adjusted pressure to the numerical value of setting before entering spring support, outlet chamber internal air pressure under the spring support is stable, and the influence that not changed by suction pressure can not produce because of suction pressure changes and judge action by accident, at reaction accurately and reliably, easy to use.
Beneficial effect of the present invention is: whole gas valve adopts pure mechanical structure, and operation is permanent reliable, and is holding or close and can not producing any electromagnetic effect of valve, can not cause the danger of lighting combustion gas.This valve meets state's home fuel gas pressure governor standard, though increased all multi-functionally in this valve inside, not influencing just has standard and function, long service life, and good stability, Security is permanent type.
(4) description of drawings
Fig. 1 is the structural representation of embodiment's one described gas valve.
Fig. 2 is the longitudinal sectional view of embodiment's one described reduction valve pipe.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment one
With reference to Fig. 1, a kind of gas valve comprises suction tude 1, reduction valve pipe 2 and gives vent to anger voltage-controlled seat.Cover is useful on and connects the combustion gas coupling nut 3 of bottle just on the suction tude 1, and spiral shell is provided with air inlet nozzle 4 in the reduction valve pipe 2.The voltage-controlled seat of giving vent to anger comprises loam cake 5 and base 6, flexible seat between described loam cake 5 and the base 6, this spring support is made up of the steel disc 7 on upper strata and the caulking gum sheet 8 of lower floor, one connecting rod 9 passes steel disc 7 and caulking gum sheet 8, these connecting rod 9 heads are provided with screw thread, the head of connecting rod 9 cooperates with a nut 10, thereby steel disc 7 and rubber gasket 8 are connected together.Described caulking gum sheet 8 is sandwiched between the loam cake 5 and base 6 of the described voltage-controlled seat of giving vent to anger.
The below of caulking gum sheet 8 is an outlet chamber 11, and outlet chamber 11 is provided with steam outlet pipe 12.The top of caulking gum sheet 8 is a spring chamber 13, and stage clip 14 is arranged in the spring chamber 13, and an end of stage clip 14 withstands on the described spring support, and the other end of described stage clip 14 withstands on and covers on described.Keep hermetic seal by caulking gum sheet 8 between outlet chamber 11 and the spring chamber 13.The front end of reduction valve pipe 2 is communicated with suction tude 1, and the rear end of reduction valve pipe 2 is communicated with outlet chamber 11.
Be provided with the formed valve port 15 of bulge loop and the spool 17 of convex in the described reduction valve pipe 2, described valve port 15 is provided with seal ring 16.Spool 17 comprise head 18 and along the reduction valve tubular axis to valve rod 19.The head 18 of spool meet to gas come to and cooperate with the seal ring 16 of valve port.The afterbody of valve rod 19 stretches in the described outlet chamber 11.Described valve port is divided into preceding air-inlet cavity 20 and back outlet chamber 21 with the tube chamber of reduction valve pipe 2
There is interim tracheae 22 that both are communicated with between the outlet chamber 11 of the suction tude 1 and the voltage-controlled seat of giving vent to anger.Interim tracheae 22 and described reduction valve pipe 2 shared tube walls.Thereby the inwall of interim tracheae 22 is established the convex shoulder of projection and is formed second valve port 29.Be provided with second spool 23 slidably in the tube chamber of interim tracheae 22, the head of second spool 23 and second valve port 29 are sealed and matched, and be provided with returning spring 24 between the inwall of the head of this second spool 23 and interim tracheae, the afterbody of described second spool 23 stretches out outside the interim tracheae 22.Second valve port 29 is divided into ante-chamber 25 and back cavity 26 with the tube chamber of described interim tracheae 22, and the preceding air-inlet cavity of ante-chamber 25 and reduction valve pipe 20 is communicated with by opening, and the back outlet chamber of back cavity 26 and reduction valve pipe 21 is communicated with by opening.
Described valve rod 19 is connected by the lever 27 that is articulated in the outlet chamber 11 with described connecting rod 9, the head bending of this lever 27, and the afterbody of valve rod 19 offers through hole 28, and the head of lever is plugged in the through hole 28 of valve rod afterbody; Also offer through hole on the connecting rod 9, the afterbody of lever 27 is plugged in the through hole on the connecting rod 27.The effect of lever 27 is to make moving up and down of connecting rod change into seesawing of valve rod.
When also leading to combustion gas, at stage clip 14 connecting rod 9 is pressed down, after driving valve rods 19, moves by connecting rod 9, and this moment, the head of spool was sealed valve port 15.Connect at the beginning of the combustion gas, the valve port 15 in the reduction valve pipe 2 still is in sealing state.At this moment at first need to promote interim endotracheal second spool 23, open second valve port 29, make combustion gas to enter in the outlet chamber 11 by interim tracheae 22.When the combustion gas that enters outlet chamber 11 arrives a certain amount ofly, produces enough big pressure when resisting the pressure of stage clip 14, air pressure is with spring support jack-up, and connecting rod 9 also rises together in company with spring support.Because connecting rod 9 and valve rod 19 are to couple together by the lever that seesaws 27 that moving up and down of connecting rod 9 is changed into valve rod 19, therefore, the rising of connecting rod 9 drives valve rod 19 reaches, and this moment, valve port 15 no longer sealed, and combustion gas can enter in the outlet chamber 11 by reduction valve pipe 2.The logical make and break of closing interim tracheae 22 this moment is closed, allow combustion gas directly enter into outlet chamber 11 by reduction valve pipe 2, make the pressure of air pressure and stage clip 14 in the outlet chamber 11 remain on state of equilibrium (need when producing valve, calculate the elasticity coefficient that adjust stage clip, thereby be issued to the balance of stage clip and air pressure at the air pressure of stipulating).In case produce gas leakage or produce tolerance unusual condition bigger than normal, this moment is because big under the gas output calibration reason condition, thereby the air pressure in the outlet chamber 11 diminishes and can't balance each other with the pressure of stage clip 14, stage clip 14 presses down spring support once more, connecting rod 9 presses down in company with spring support, thereby move the valve port 15 of sealing the reduction valve pipe after the connecting rod that presses down 9 drives valve rod 19, stop the continuation circulation of combustion gas, can effectively stop and reveal and the abnormal interruption ventilation.
Certainly the valve port of reduction valve pipe and more than a kind of form of bulge loop can also be grooves.The valve port of interim tracheae also can be a groove more than a kind of form of convex shoulder.
Embodiment two
Be inserted with the valve that is used to cut off interim tracheae tube chamber on the tube wall of described interim tracheae slidably, hermetic seal between the tube wall of described valve and described interim tracheae.All the other structures are identical with embodiment one with mode of execution.
Present embodiment and embodiment's one difference is: the logical make and break of interim tracheae is closed different, is the form that adopts spool among the embodiment one, is the form of valve in the present embodiment.
Embodiment three
Be equipped with groove on the afterbody of described valve rod and the described connecting rod, valve rod is connected by gear with connecting rod, and this gear is positioned at the rear of connecting rod, the groove engagement of gear and connecting rod and valve rod afterbody.All the other structures are identical with embodiment two with mode of execution.
Present embodiment and embodiment's two difference is: the structure of the linkage that seesaws that is used for moving up and down of connecting rod changed into valve rod is different, is the form of lever among the embodiment two, is the form of gear in the present embodiment.
Embodiment four
Be equipped with groove on the afterbody of described valve rod and the described connecting rod, valve rod is connected by gear with connecting rod, and this gear is positioned at the rear of connecting rod, the groove engagement of gear and connecting rod and valve rod afterbody.All the other structures are identical with embodiment one with mode of execution.
Present embodiment and embodiment's one difference is: the structure of the linkage that seesaws that is used for moving up and down of connecting rod changed into valve rod is different, is the form of lever among the embodiment two, is the form of gear in the present embodiment.
Embodiment five
Described interim tracheae and described reduction valve pipe are separate, and an end of interim tracheae is communicated with described suction tude, and the other end is communicated with described outlet chamber.All the other structures are identical with embodiment one with mode of execution.
Embodiment six
Described interim tracheae and described reduction valve pipe are separate, and an end of interim tracheae is communicated with described suction tude, and the other end is communicated with described outlet chamber.All the other structures are identical with embodiment two with mode of execution.
Embodiment seven
Described interim tracheae and described reduction valve pipe are separate, and an end of interim tracheae is communicated with described suction tude, and the other end is communicated with described outlet chamber.All the other structures are identical with embodiment three with mode of execution.
Embodiment eight
Described interim tracheae and described reduction valve pipe are separate, and an end of interim tracheae is communicated with described suction tude, and the other end is communicated with described outlet chamber.All the other structures are identical with embodiment four with mode of execution.
Claims (10)
1. gas valve, comprise suction tude, reduction valve pipe and give vent to anger voltage-controlled seat, cover is useful on the coupling nut that connects gas cylinder on the described suction tude, the described voltage-controlled seat of giving vent to anger comprises loam cake and base, flexible seat between described loam cake and the base, described spring support below is an outlet chamber, the top of described spring support is a spring chamber, hermetic seal between described outlet chamber and the spring chamber, the front end of described reduction valve pipe is communicated with described suction tude, and the rear end of described reduction valve pipe is communicated with described outlet chamber;
Described outlet chamber is provided with steam outlet pipe, in the described spring chamber stage clip is arranged, and an end of described stage clip withstands on the described spring support, and the other end of described stage clip withstands on and covers on described;
It is characterized in that:
Spiral shell is provided with air inlet nozzle in the described reduction valve pipe;
Also comprise the interim tracheae that is used to be communicated with described suction tude and outlet chamber, be provided with logical make and break in the described interim tracheae and close;
Be provided with valve port and spool in the described reduction valve pipe, described valve port is provided with seal ring, described spool comprise head and along the reduction valve tubular axis to valve rod, the head of described spool is arranged on the place ahead of described valve port and cooperates with the seal ring of described valve port, and the afterbody of described valve rod passes described valve port, stretches in the described outlet chamber;
Be equipped with connecting rod on the described spring support, described connecting rod is connected by the linkage that seesaws that moving up and down of connecting rod is changed into valve rod with described valve rod.
2. gas valve as claimed in claim 1 is characterized in that: linkage is the lever that is articulated in the described outlet chamber, the head bending of described lever, and the head of lever is connected with the afterbody of described valve rod, and the afterbody of described lever is connected with described connecting rod.
3. gas valve as claimed in claim 1, it is characterized in that: be equipped with groove on the afterbody of described valve rod and the described connecting rod, described linkage is a gearing, and described gearing is positioned at the rear of described connecting rod, the afterbody of described gearing and described valve rod and connecting rod engagement.
4. as the described gas valve of one of claim 1～3, it is characterized in that: be inserted with the valve that is used to cut off interim tracheae tube chamber, hermetic seal between the tube wall of described valve and described interim tracheae on the tube wall of described interim tracheae slidably.
5. as the described gas valve of one of claim 1～3, it is characterized in that: the inwall of described interim tracheae is provided with second valve port, be provided with second spool in the tube chamber of described interim tracheae slidably, the head of described second spool cooperates with described second sealing valve port, and be provided with returning spring between the inwall of the head of this second spool and interim tracheae, the afterbody of described second spool stretches out outside the described interim tracheae.
6. as the described gas valve of one of claim 1～3, it is characterized in that: the shared tube wall of described interim tracheae and described reduction valve pipe, the tube chamber that described logical make and break is closed described interim tracheae is divided into ante-chamber and back cavity, described valve port is divided into preceding air-inlet cavity and back outlet chamber with the tube chamber of described reduction valve pipe, described ante-chamber is communicated with described preceding air-inlet cavity, and described back cavity is communicated with described back outlet chamber.
7. gas valve as claimed in claim 4, it is characterized in that: the shared tube wall of described interim tracheae and described reduction valve pipe, the tube chamber that described logical make and break is closed described interim tracheae is divided into ante-chamber and back cavity, described valve port is divided into preceding air-inlet cavity and back outlet chamber with the tube chamber of described reduction valve pipe, described ante-chamber is communicated with described preceding air-inlet cavity, and described back cavity is communicated with described back outlet chamber.
8. gas valve as claimed in claim 5, it is characterized in that: the shared tube wall of described interim tracheae and described reduction valve pipe, the tube chamber that described logical make and break is closed described interim tracheae is divided into ante-chamber and back cavity, described valve port is divided into preceding air-inlet cavity and back outlet chamber with the tube chamber of described reduction valve pipe, described ante-chamber is communicated with described preceding air-inlet cavity, and described back cavity is communicated with described back outlet chamber.
9. gas valve as claimed in claim 1 is characterized in that: described spring support is made up of the steel disc on upper strata and the caulking gum sheet of lower floor, and described caulking gum sheet is sandwiched between the loam cake and base of the described voltage-controlled seat of giving vent to anger.
10. gas valve as claimed in claim 9 is characterized in that: described link rod head is provided with screw thread, and the head of described connecting rod cooperates with a nut.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100527674A CN100408903C (en) | 2006-08-02 | 2006-08-02 | Gas fuel valve |
| PCT/CN2007/070310 WO2008017259A1 (en) | 2006-08-02 | 2007-07-18 | A gas control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100527674A CN100408903C (en) | 2006-08-02 | 2006-08-02 | Gas fuel valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1888503A CN1888503A (en) | 2007-01-03 |
| CN100408903C true CN100408903C (en) | 2008-08-06 |
Family
ID=37577790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100527674A Expired - Fee Related CN100408903C (en) | 2006-08-02 | 2006-08-02 | Gas fuel valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100408903C (en) |
| WO (1) | WO2008017259A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408903C (en) * | 2006-08-02 | 2008-08-06 | 张科辉 | Gas fuel valve |
| CN103742686B (en) * | 2013-12-25 | 2015-12-09 | 卢致英 | A kind of fastener type gas valve |
| CN109373026B (en) * | 2018-11-26 | 2024-05-10 | 江汉油田兴亚工矿配件潜江有限公司 | Differential pressure type constant pressure air release valve for petroleum exploitation |
| CN114658908A (en) * | 2020-12-22 | 2022-06-24 | 台山市意立达瓦斯器材有限公司 | Novel low-pressure gas pressure reducing valve |
| CN116379194B (en) * | 2023-06-05 | 2023-08-04 | 河北欧意诺燃气设备有限公司 | Pressure relief explosion-proof gas pressure regulator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2189248Y (en) * | 1993-11-11 | 1995-02-08 | 高培荣 | Low pressure gas pipeline equalising valve |
| CN2367854Y (en) * | 1999-04-05 | 2000-03-08 | 江苏省国营淮海石油机械厂 | Constant-flow regulation valve |
| CN2491667Y (en) * | 2001-07-23 | 2002-05-15 | 北京兰天达汽车清洁燃料技术有限公司 | Transfer overcurrent safety protector of compressed gas pipeline |
| CN1667281A (en) * | 2005-04-08 | 2005-09-14 | 浙江工业大学 | Energy-saving type parallel connection vacuum generator |
| CN2753930Y (en) * | 2004-05-29 | 2006-01-25 | 俞凤锁 | Gas pressure-reducing timing-supply valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1216493B (en) * | 1988-03-22 | 1990-03-08 | Liquipibigas S P A | PERFECTED PRESSURE REGULATOR, TO CONTROL THE FLOW OF LIQUID GAS. |
| CN2228588Y (en) * | 1994-10-27 | 1996-06-05 | 刘宝金 | Multi-function valve for pipe gas range |
| CN2380772Y (en) * | 1998-10-08 | 2000-05-31 | 毛顺发 | Safety intelligent valve for gas |
| CN100408903C (en) * | 2006-08-02 | 2008-08-06 | 张科辉 | Gas fuel valve |
-
2006
- 2006-08-02 CN CNB2006100527674A patent/CN100408903C/en not_active Expired - Fee Related
-
2007
- 2007-07-18 WO PCT/CN2007/070310 patent/WO2008017259A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2189248Y (en) * | 1993-11-11 | 1995-02-08 | 高培荣 | Low pressure gas pipeline equalising valve |
| CN2367854Y (en) * | 1999-04-05 | 2000-03-08 | 江苏省国营淮海石油机械厂 | Constant-flow regulation valve |
| CN2491667Y (en) * | 2001-07-23 | 2002-05-15 | 北京兰天达汽车清洁燃料技术有限公司 | Transfer overcurrent safety protector of compressed gas pipeline |
| CN2753930Y (en) * | 2004-05-29 | 2006-01-25 | 俞凤锁 | Gas pressure-reducing timing-supply valve |
| CN1667281A (en) * | 2005-04-08 | 2005-09-14 | 浙江工业大学 | Energy-saving type parallel connection vacuum generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1888503A (en) | 2007-01-03 |
| WO2008017259A1 (en) | 2008-02-14 |
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