CN214368018U - Gas negative pressure valve - Google Patents
Gas negative pressure valve Download PDFInfo
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- CN214368018U CN214368018U CN202120260468.XU CN202120260468U CN214368018U CN 214368018 U CN214368018 U CN 214368018U CN 202120260468 U CN202120260468 U CN 202120260468U CN 214368018 U CN214368018 U CN 214368018U
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Abstract
The utility model relates to a gas negative pressure valve, which comprises a valve body and an upper cover matched with the valve body, the valve body is provided with an air inlet channel and an air outlet channel, the air outlet channel is connected with an air outlet joint outwards, a diaphragm assembly is arranged between the upper cover and the valve body, an air inlet mechanism is arranged in the valve body, the diaphragm assembly comprises a small pressure plate, a large pressure plate and a diaphragm which are coaxially arranged from top to bottom in sequence, the small pressing plate, the large pressing plate and the film are all provided with through holes, hooks are riveted in the through holes in a rotating way, the air inlet mechanism comprises a lever arranged in the valve body, one end of the lever is connected with the hook, the other end of the lever is connected with a sealing gasket, the sealing gasket is connected with a port of the air inlet channel positioned in the valve body, the lever is further provided with a pressure balance mechanism, and the pressure balance mechanism is arranged between the positioning pin and the hook. The utility model has the advantages of simple structure and variable adjustment.
Description
Technical Field
The utility model relates to a gas valve technical field especially relates to a gas negative pressure valve.
Background
A pressure reducing valve is a device that automatically reduces the working pressure of a pipeline, and has the function of reducing a medium with higher pressure to a given pressure after a given pressure reducing range. Most of the conventional pressure reducing valves are constant pressure reducing valves, i.e., the pressure output from the pressure reducing valve is maintained in a constant range, and are normally open pressure reducing valves. However, for gas equipment such as a gas engine, such a constant pressure reducing valve is not suitable, because the required gas pressure and gas amount are not constant when the engine runs, and real-time adjustment is needed according to actual conditions so as to achieve the purpose that the output gas pressure and gas amount are matched with those required by the engine.
Disclosure of Invention
To the not enough of above-mentioned prior art, the technical problem that this patent application will solve is how to provide a simple structure, gas negative pressure valve of variable adjustment.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a gas negative pressure valve comprises a valve body and an upper cover matched with the valve body, wherein a balance hole is formed in the upper cover, a gas inlet channel and a gas outlet channel are formed in the valve body, the gas outlet channel is outwards connected with a gas outlet joint, a diaphragm assembly is arranged between the upper cover and the valve body, a gas inlet mechanism is arranged in the valve body, and the gas inlet mechanism is connected with the diaphragm assembly and the gas inlet channel; the diaphragm assembly includes little clamp plate, big clamp plate and the diaphragm of coaxial setting, and wherein big clamp plate includes two, and is located the both sides of diaphragm, all be provided with the perforation on little clamp plate, big clamp plate and the diaphragm, it has the couple to perforate internal rotation riveting, mechanism of admitting air is including setting up lever in the valve body, the lever is supported fixedly by the locating pin, lever one end with the couple is connected, the lever other end is connected with sealed the pad, sealed pad with inlet channel is located the inside port of valve body is connected, still be provided with pressure balance mechanism on the lever, pressure balance mechanism sets up the locating pin with between the couple, the vertical setting of pressure balance mechanism and the other end with the valve body bottom is connected.
When the valve is used, the air outlet channel of the valve body is connected with the fuel gas channel of the carburetor, the valve body is connected to fuel gas equipment like a fuel gas engine through the carburetor, and the air inlet channel is connected with a fuel gas source. Before the engine is not started, the sealing gasket at the other end of the lever is always pressed on the air inlet channel under the comprehensive action of the atmospheric pressure and the pressure balancing mechanism, so that the air tightness is ensured, and the safety accident is avoided; when the engine is started, the piston moves to generate negative pressure, gas in the valve body can be sucked into the engine, a negative pressure state is formed in the valve body, the diaphragm assembly can be driven to move downwards after the negative pressure reaches a certain value, the lever is driven, the sealing gasket at the other end of the lever moves along with the lever, the gas inlet channel is opened, gas enters, and after the gas pressure is balanced, the diaphragm assembly, the lever, the pressure balancing mechanism and the sealing gasket keep a relatively static state. When the required gas quantity of the engine changes, the pressure can also change, and at the moment, the diaphragm assembly, the lever, the pressure balance mechanism and the sealing gasket are correspondingly adjusted, so that the pressure in the valve body keeps balance, and the gas is stably output. When this scheme needs to be adjusted, through the different pressure balance mechanism of apolegamy and the matching that the commonality was realized to the joint of giving vent to anger of apolegamy, enlarge application range need not to be because of changing the valve body inner space and whole redoing.
Preferably, the pressure balance mechanism comprises a pressure balance spring, the valve body and the lever are opposite to the pressure balance spring and are provided with limit bosses, and two ends of the pressure balance spring are arranged in the limit bosses respectively.
Like this, can realize providing the basis to the pressure balance spring installation, can realize spacingly again the pressure balance spring, guarantee its result of use, pressure balance spring's compression volume control air input promptly.
Preferably, the difference between the outer diameter of the diaphragm and the outer diameter of the large pressing plate is less than 2 mm.
Like this, can ensure the connection stability and the intensity of whole steamed bun piece assembly, have and to guarantee that the diaphragm has good return nature and sensitivity, avoid changing the internal volume of valve and cause the error of admitting air.
Preferably, the large pressing plate is made of aluminum and has a thickness of 0.4 mm.
Therefore, the normal work of the diaphragm can be guaranteed, the middle of the diaphragm can be stably supported, and excessive deformation of the diaphragm is avoided.
Preferably, the small pressing plate is made of stainless steel and has a thickness of 0.4 mm.
Therefore, the small pressing plate can be arranged on the topmost layer to bear the rotating riveting force, and the large pressing plate and the diaphragm are guaranteed not to deform.
Preferably, the bottom of the hook is provided with a groove, and the groove is connected with the lever.
Therefore, the lever can be easily hung, and the lever and the hook can be quickly connected and positioned.
As optimization, be provided with the seal receptacle on the valve body, the seal receptacle with inlet channel coaxial setting, sealed pad with the seal receptacle cooperation sets up.
Thus, the sealing performance to the inside can be realized at the non-air inlet stage.
As an optimization, the upper cover is provided with an enrichment button, the enrichment button is right opposite to the hook, and a reset spring is arranged between the enrichment button and the upper cover.
In this way, enrichment can be achieved very quickly and simply, the number of engine starts is reduced, and the protection of engine starting components is enhanced.
Preferably, two balancing holes are arranged.
In conclusion, the following effects are achieved:
(1) when not in use, the safety lock is in a normally closed state, and the safety is fully ensured.
(2) The gas air input of inlet end can be adjusted according to the gas volume size of output end actual need when using to satisfy the performance and the emission requirement of engine, can better protect the gas equipment of output, improved gas equipment's life, make the engine have good startability.
(3) Since the springs are grouped by specifying the elastic force when compressed to 25.5mm left and specifying the spring constant, the engine performance and the emission can be matched quickly by changing the number of the springs of different groups and changing the size of the inner diameter of the air outlet joint when matching the engine and the carburetor.
(4) The diaphragm can be fast and stable carry out position adjustment and return.
Drawings
Fig. 1 is a schematic structural view of a gas negative pressure valve of the present invention.
Fig. 2 is an external structural schematic diagram of the gas negative pressure valve shown in fig. 1.
Fig. 3 is a schematic structural view of the hook in fig. 1.
Fig. 4 is a schematic structural view of the diaphragm assembly.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
As shown in fig. 1-4, a gas negative pressure valve comprises a valve body 1 and an upper cover 2 arranged in cooperation with the valve body 1, wherein a balance hole 21 is formed in the upper cover 2, an air inlet channel 11 and an air outlet channel 14 are formed in the valve body 1, the air outlet channel is connected with an air outlet joint 13 outwards, a diaphragm assembly is arranged between the upper cover 2 and the valve body 1, an air inlet mechanism is arranged in the valve body 1, and the air inlet mechanism is connected with the diaphragm assembly and the air inlet channel; the diaphragm assembly includes little clamp plate 4, big clamp plate 6 and the diaphragm 3 of coaxial setting, and wherein big clamp plate 6 includes two, and is located the both sides of diaphragm 3, all be provided with the perforation on little clamp plate 4, big clamp plate 6 and the diaphragm 3, it has couple 5 to perforate the internal rotation riveting, mechanism admits air is including setting up lever 8 in the valve body 1, lever 8 is supported fixedly by locating pin 9, lever 8 one end with couple 5 is connected, the lever 8 other end is connected with sealed 10, sealed 10 with inlet channel 11 is located the inside port of valve body is connected, still be provided with pressure balance mechanism on the lever 8, pressure balance mechanism sets up locating pin 9 with between the couple 5, the vertical setting of pressure balance mechanism and the other end with 1 bottom of valve body is connected.
When the valve is used, the air outlet channel of the valve body is connected with the fuel gas channel of the carburetor, the valve body is connected to fuel gas equipment like a fuel gas engine through the carburetor, and the air inlet channel is connected with a fuel gas source. Before the engine is not started, the sealing gasket at the other end of the lever is always pressed on the air inlet channel under the comprehensive action of the atmospheric pressure and the pressure balancing mechanism, so that the air tightness is ensured, and the safety accident is avoided; when the engine is started, the piston moves to generate negative pressure, gas in the valve body can be sucked into the engine, a negative pressure state is formed in the valve body, the diaphragm assembly can be driven to move downwards after the negative pressure reaches a certain value, the lever is driven, the sealing gasket at the other end of the lever moves along with the lever, the gas inlet channel is opened, gas enters, and after the gas pressure is balanced, the diaphragm assembly, the lever, the pressure balancing mechanism and the sealing gasket keep a relatively static state. When the required gas quantity of the engine changes, the pressure can also change, and at the moment, the diaphragm assembly, the lever, the pressure balance mechanism and the sealing gasket are correspondingly adjusted, so that the pressure in the valve body keeps balance, and the gas is stably output. When this scheme needs to be adjusted, through the different pressure balance mechanism of apolegamy and the matching that the commonality was realized to the joint of giving vent to anger of apolegamy, enlarge application range need not to be because of changing the valve body inner space and whole redoing.
In this embodiment, the pressure balance mechanism includes pressure balance spring 7, valve body 1 with lever 8 is just right pressure balance spring 7 all is provided with spacing boss 15, pressure balance spring 7's both ends set up respectively in the spacing boss.
Like this, can realize providing the basis to the pressure balance spring installation, can realize spacingly again the pressure balance spring, guarantee its result of use, pressure balance spring's compression volume control air input promptly.
In this embodiment, the difference between the outer diameter of the diaphragm 3 and the outer diameter of the large pressing plate 6 is less than 2 mm.
Like this, can ensure the connection stability and the intensity of whole steamed bun piece assembly, have and to guarantee that the diaphragm has good return nature and sensitivity, avoid changing the internal volume of valve and cause the error of admitting air.
In this embodiment, the large pressing plate 6 is made of aluminum and has a thickness of 0.4 mm.
Therefore, the normal work of the diaphragm can be guaranteed, the middle of the diaphragm can be stably supported, and excessive deformation of the diaphragm is avoided.
In this embodiment, the small press plate 4 is made of stainless steel and has a thickness of 0.4 mm.
Therefore, the small pressing plate can be arranged on the topmost layer to bear the rotating riveting force, and the large pressing plate and the diaphragm are guaranteed not to deform.
In this embodiment, the bottom of the hook 5 is provided with a groove 51, and the groove 51 is connected with the lever 8.
Therefore, the lever can be easily hung, and the lever and the hook can be quickly connected and positioned.
In this embodiment, a sealing seat 12 is arranged on the valve body 1, the sealing seat 12 and the air inlet channel 11 are coaxially arranged, and the sealing gasket 10 is arranged in cooperation with the sealing seat 12.
Thus, the sealing performance to the inside can be realized at the non-air inlet stage.
In this embodiment, the upper cover 2 is provided with an enrichment button 22, the enrichment button 22 is arranged right opposite to the hook 5, and a return spring 23 is arranged between the enrichment button 22 and the upper cover 2.
In this way, enrichment can be achieved very quickly and simply, the number of engine starts is reduced, and the protection of engine starting components is enhanced.
In this embodiment, there are two balancing holes 21.
Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, to the extent that such modifications and variations of the present invention fall within the scope of the present claims and their equivalents, it is intended that the present invention encompass such modifications and variations as well.
Claims (9)
1. A gas negative pressure valve is characterized by comprising a valve body and an upper cover matched with the valve body, wherein a balance hole is formed in the upper cover, a gas inlet channel and a gas outlet channel are formed in the valve body, the gas outlet channel is outwards connected with a gas outlet joint, a diaphragm assembly is arranged between the upper cover and the valve body, a gas inlet mechanism is arranged in the valve body, and the gas inlet mechanism is connected with the diaphragm assembly and the gas inlet channel; the diaphragm assembly includes little clamp plate, big clamp plate and the diaphragm of coaxial setting, and wherein big clamp plate includes two, and is located the both sides of diaphragm, all be provided with the perforation on little clamp plate, big clamp plate and the diaphragm, it has the couple to perforate internal rotation riveting, mechanism of admitting air is including setting up lever in the valve body, the lever is supported fixedly by the locating pin, lever one end with the couple is connected, the lever other end is connected with sealed the pad, sealed pad with inlet channel is located the inside port of valve body is connected, still be provided with pressure balance mechanism on the lever, pressure balance mechanism sets up the locating pin with between the couple, the vertical setting of pressure balance mechanism and the other end with the valve body bottom is connected.
2. The gas negative pressure valve according to claim 1, wherein the pressure balance mechanism comprises a pressure balance spring, the valve body and the lever are provided with a limit boss opposite to the pressure balance spring, and two ends of the pressure balance spring are respectively arranged in the limit bosses.
3. A gas negative pressure valve according to claim 2, characterized in that the difference between the outer diameter of the diaphragm and the outer diameter of the large pressure plate is less than 2 mm.
4. A gas negative pressure valve according to claim 3, characterized in that the material of the large pressure plate is aluminum and the thickness is 0.4 mm.
5. The gas negative pressure valve according to claim 4, wherein the small pressure plate is made of stainless steel and has a thickness of 0.4 mm.
6. The gas negative pressure valve according to claim 5, wherein the bottom of the hook is provided with a groove, and the groove is connected with the lever.
7. The gas negative pressure valve according to claim 6, wherein a sealing seat is arranged on the valve body, the sealing seat is coaxial with the air inlet channel, and the sealing gasket is matched with the sealing seat.
8. The gas negative pressure valve according to claim 7, wherein the upper cover is provided with an enrichment button, the enrichment button is arranged opposite to the hook, and a return spring is arranged between the enrichment button and the upper cover.
9. A gas negative pressure valve according to claim 8, characterized in that there are two balancing holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120260468.XU CN214368018U (en) | 2021-01-29 | 2021-01-29 | Gas negative pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120260468.XU CN214368018U (en) | 2021-01-29 | 2021-01-29 | Gas negative pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214368018U true CN214368018U (en) | 2021-10-08 |
Family
ID=77960989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120260468.XU Active CN214368018U (en) | 2021-01-29 | 2021-01-29 | Gas negative pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214368018U (en) |
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2021
- 2021-01-29 CN CN202120260468.XU patent/CN214368018U/en active Active
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