CN220249030U - Check valve for fuel gas - Google Patents
Check valve for fuel gas Download PDFInfo
- Publication number
- CN220249030U CN220249030U CN202320924602.0U CN202320924602U CN220249030U CN 220249030 U CN220249030 U CN 220249030U CN 202320924602 U CN202320924602 U CN 202320924602U CN 220249030 U CN220249030 U CN 220249030U
- Authority
- CN
- China
- Prior art keywords
- check valve
- pipeline
- wall
- rack
- check
- 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.)
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Links
- 239000002737 fuel gas Substances 0.000 title claims description 11
- 239000007789 gas Substances 0.000 claims description 29
- 210000003454 tympanic membrane Anatomy 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model relates to the technical field of gas valves, in particular to a check valve for gas, which comprises an air inlet pipe, wherein one side of the air inlet pipe is provided with a check mechanism, the other side of the check mechanism is provided with an air outlet pipe, the check mechanism comprises an outer wall, the inner wall of one end of the outer wall, which is close to the air inlet pipe, is rotationally connected with a ball valve, two ends of the ball valve are provided with air vents, the top of the ball valve is fixedly provided with a knob, the middle part of the outer side of the knob penetrates through the outer wall and is rotationally connected with the outer wall, one end, which is close to the knob, of the inner wall of the outer wall is rotationally connected with a rotating shaft, the bottom of the outer side of the rotating shaft is fixedly provided with a movable valve, one end, which is close to the bottom of the movable valve, of the outer wall is fixedly connected with a limiting block, the limiting block is movably connected with the movable valve, and when the ball valve is closed, the ball valve is further closed by pushing a rack by backflow gas, and gas does not flow back to the air inlet pipe along a gap before the movable valve is closed.
Description
Technical Field
The utility model relates to the technical field of gas valves, in particular to a check valve for gas.
Background
The gas check valve is a valve for preventing the backflow of the gas pipeline, is usually arranged at the inlet of the gas pipeline, ensures that the gas can only flow unidirectionally, and can be automatically closed when the flowing direction of the gas is reversed, so as to prevent the gas from flowing backwards, thereby protecting the safety of the gas pipeline and related equipment.
However, the common gas check valve is simpler in structure, the gas flow direction is mostly controlled by the movable valve limiting the turning angle, the valve is turned over when the gas flows out, the valve is reset to be closed when the gas discharge is finished, the gas in the movable valve is still in a circulating state before the valve is closed, if the returned gas flows in along a gap before the movable valve is completely closed, the gas can still be caused to a certain extent to flow back, and the gas output in the gas inlet pipe and the gas returned by the gas outlet pipe can not be separated well due to the single valve structure.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the check valve is single in structure and cannot separate the return fuel gas well.
The aim of the utility model can be achieved by the following technical scheme:
the check valve for the fuel gas comprises an air inlet pipe, wherein a check mechanism is arranged on one side of the air inlet pipe, and an air outlet pipe is arranged on the other side of the check mechanism.
As a further scheme of the utility model: the check mechanism comprises a check valve pipeline, the check valve pipeline is positioned on the inner wall of one end close to the air inlet pipe and is rotationally connected with a ball valve, air vents are formed in the two ends of the ball valve, a knob is fixedly arranged at the top of the ball valve, and the middle part of the outer side of the knob penetrates through the check valve pipeline and is rotationally connected with the check valve pipeline.
As a further scheme of the utility model: the one end that is close to the knob of check valve pipeline inner wall rotates and is connected with the pivot, the bottom fixed mounting in the pivot outside has the movable valve, the one end fixedly connected with stopper that the check valve pipeline inner wall is located and is close to the movable valve bottom, stopper and movable valve swing joint.
As a further scheme of the utility model: the front and back middle of the rotating shaft are fixedly connected with gears, and one end of the bottom of each gear is connected with racks in a meshed mode.
As a further scheme of the utility model: the sliding groove is formed in the outer side of the rack, the check valve pipeline is fixedly connected with the pin shaft at one end, close to the rack, of the check valve pipeline, the outer side of the pin shaft is in sliding connection with the rack, the sliding rail is fixedly installed at the bottom of the rack, and the side edge of the sliding rail is fixedly connected with the check valve pipeline.
As a further scheme of the utility model: the rack is located the one end fixed mounting who keeps away from the movable valve has the centre gripping frame, the inside fretwork of centre gripping frame just the centre gripping frame is located near the fretwork block and is connected with the tympanic membrane, the outside and the check valve pipeline sliding connection of centre gripping frame.
As a further scheme of the utility model: the check valve pipeline is located the top through connection that is close to the outlet duct and has the shunt tubes, the screw thread has been seted up to the both ends inner wall of check valve pipeline, just the inner wall of check valve pipeline is located the department that is close to the screw thread and intake pipe and outlet duct threaded connection, and check valve pipeline is located and has sealed pad with intake pipe and outlet duct junction fixed mounting.
The utility model has the beneficial effects that:
according to the utility model, the movable valve capable of opening and closing along with the flow direction of gas is arranged at the rear of the main control ball valve, after the ball valve is opened, the gas flows into the movable valve along the pipeline to push the movable valve away, the gear drives the rack to move away the rear tympanic membrane with the function of intercepting the gas, so that the gas is ensured to be normally conducted in the valve, when the ball valve is closed, the backflow gas pushes the tympanic membrane to reset the rack, and further, the movable valve is closed, and because a certain distance is reserved between the two valves, the movable valve is ensured not to flow back to the air inlet pipe along a gap before being completely closed, and the non-return effect is enhanced.
Drawings
The utility model is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of the overall internal structure of the present utility model;
FIG. 2 is an enlarged schematic view of the area A of FIG. 1;
FIG. 3 is a top view of the overall structure of the return suspension mechanism of the present utility model;
fig. 4 is a schematic cross-sectional view of the movable valve of the present utility model when opened.
In the figure: 1. an air inlet pipe; 2. a non-return mechanism; 201. a check valve pipe; 202. a knob; 203. a ball valve; 204. a sealing gasket; 205. a rotating shaft; 206. a gear; 207. a movable valve; 208. a rack; 209. a pin shaft; 210. a shunt; 211. a clamping frame; 212. a tympanic membrane; 3. and an air outlet pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-4, a check valve for fuel gas comprises an air inlet pipe 1, one side of the air inlet pipe 1 is provided with a check mechanism 2, the other side of the check mechanism 2 is provided with an air outlet pipe 3, the check mechanism 2 comprises a check valve pipeline 201, the inner wall of one end, close to the air inlet pipe 1, of the check valve pipeline 201 is rotatably connected with a ball valve 203, two ends of the ball valve 203 are provided with air vents, the top of the ball valve 203 is fixedly provided with a knob 202, the middle part of the outer side of the knob 202 penetrates through the check valve pipeline 201 and is rotatably connected with the check valve pipeline 201, and the ball valve 203 is rotated through the knob 202 to control whether the gas from the air inlet pipe 1 enters the check mechanism 2 or not;
one end, close to the knob 202, of the inner wall of the check valve pipeline 201 is rotatably connected with a rotating shaft 205, a movable valve 207 is fixedly arranged at the bottom of the outer side of the rotating shaft 205, the inner wall of the check valve pipeline 201 is positioned at one end, close to the bottom of the movable valve 207, of the check valve pipeline 201, a limiting block is fixedly connected with the check valve pipeline, the limiting block is movably connected with the movable valve 207, the stability of the movable valve 207 in a closed state is guaranteed by the limiting block, and the movable valve 207 cannot continuously rotate anticlockwise in the closed state;
a gear 206 is fixedly connected between the front and back surfaces of the rotating shaft 205, one end of the bottom of the gear 206 is connected with a rack 208 in a meshed manner, and when the movable valve 207 drives the rotating shaft 205 to rotate, the rack 208 can be driven by the gear 206 to displace;
a sliding groove is formed in the outer side of the rack 208 in a clamping way, a pin shaft 209 is fixedly connected to one end, close to the rack 208, of the check valve pipeline 201, the outer side of the pin shaft 209 is in sliding connection with the rack 208, a sliding rail is fixedly installed at the bottom of the rack 208, and the side edge of the sliding rail is fixedly connected with the check valve pipeline 201 to ensure the moving track of the rack 208 in the horizontal direction;
the rack 208 is located one end away from the movable valve 207 and fixedly provided with a clamping frame 211, the inside of the clamping frame 211 is hollowed out, the clamping frame 211 is located nearby the hollowed out part and is connected with a tympanic membrane 212 in a clamping manner, the outer side of the clamping frame 211 is in sliding connection with the check valve pipeline 201, and the tympanic membrane 212 is a rubber film, so that the contact area between the rack 208 and the backflow fuel gas is increased, and the rack 208 is reset more easily under the influence of backflow air pressure;
the check valve pipeline 201 is located the top through connection that is close to outlet duct 3 has shunt tubes 210, the screw thread has been seted up to the both ends inner wall of check valve pipeline 201, and the inner wall of check valve pipeline 201 is located the department that is close to the screw thread and intake pipe 1 and outlet duct 3 threaded connection, check valve pipeline 201 is located and is connected department fixed mounting with intake pipe 1 and outlet duct 3 and has sealed pad 204, shunt tubes 210 buffering a part of gas flow to tympanic membrane 212, prevent that atmospheric pressure is too big and damage the device, sealed pad is used for guaranteeing the gas tightness of connection between the pipelines.
The working principle of the utility model is as follows:
when the air inlet pipe 1 guides out air, the knob 202 is rotated firstly, so that the air inlet and the air inlet pipe 1 are in the same direction, and when the air flows into the check valve along the check valve pipeline 201, the air flows to the movable valve 207, the movable valve 207 is pushed to rotate anticlockwise due to the influence of strong air pressure, so that the air can pass through the movable valve, meanwhile, the movable valve 207 drives the rotating shaft 205 to rotate, and then drives the gear 206 to rotate on the rack 208, so that the rack 208 is displaced towards the direction of the air outlet 3, and then drives the clamping frame to be separated from the check valve pipeline 201, and at the moment, the pipeline near the check valve is also in a circulation state, and the air can normally enter the air outlet pipe 3;
the knob 202 is continuously rotated, so that the air inlet of the ball valve 203 is vertical to the air inlet pipe 1, the air in the air inlet pipe 1 stops continuously conveying the air into the check mechanism 2, at the moment, a part of the air reflowing in the air outlet 3 floats upwards to enter the shunt pipe 210, the rest of the air drives the tympanic membrane 212 and then drives the rack 208 to push towards the air inlet 1, and then the gear 206 drives the movable valve 207 to rotate clockwise to finally contact with the limiting block, closing is completed, and when the air in the check valve pipeline 201 and the shunt pipe 210 reaches the movable valve 207, the movable valve 207 keeps a closed state, and the reflowing air cannot continuously flow towards the air inlet pipe 1.
The foregoing describes one embodiment of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (6)
1. The check valve for the fuel gas comprises an air inlet pipe (1), and is characterized in that one side of the air inlet pipe (1) is provided with a check mechanism (2), and the other side of the check mechanism (2) is provided with an air outlet pipe (3);
the check mechanism (2) comprises a check valve pipeline (201), the check valve pipeline (201) is located at the inner wall of one end close to the air inlet pipe (1) and is rotationally connected with a ball valve (203), air vents are formed in the two ends of the ball valve (203), a knob (202) is fixedly installed at the top of the ball valve (203), and the middle of the side edge of the knob (202) penetrates through the check valve pipeline (201) and is rotationally connected with the check valve pipeline (201).
2. The check valve for fuel gas according to claim 1, wherein a rotating shaft (205) is rotatably connected to one end, close to the knob (202), of the inner wall of the check valve pipeline (201), a movable valve (207) is fixedly installed at the bottom of the outer side of the rotating shaft (205), a limiting block is fixedly connected to one end, close to the bottom of the movable valve (207), of the inner wall of the check valve pipeline (201), and the limiting block is movably connected with the movable valve (207).
3. A check valve for fuel gas according to claim 2, wherein a gear (206) is fixedly connected between the front and back surfaces of the rotary shaft (205), and one end of the bottom of the gear (206) is engaged with a rack (208).
4. A check valve for gas according to claim 3, wherein a chute is provided on the outer side of the rack (208), the check valve pipe (201) is located at one end close to the rack (208) and fixedly connected with a pin (209), the outer side of the pin (209) is slidably connected with the rack (208), a slide rail is fixedly installed on the bottom of the rack (208), and the side edge of the slide rail is fixedly connected with the check valve pipe (201).
5. A check valve for fuel gas according to claim 3, wherein the rack (208) is located one end of keeping away from the movable valve (207) and fixedly installs the centre gripping frame (211), the inside fretwork of centre gripping frame (211), just the inner wall of centre gripping frame (211) is located near the fretwork block and is connected with tympanic membrane (212), the outside and the check valve pipeline (201) sliding connection of centre gripping frame (211).
6. The check valve for fuel gas according to claim 1, wherein the check valve pipeline (201) is located near the top of the air outlet pipe (3) and is connected with the shunt pipe (210) in a penetrating way, threads are arranged on the inner walls of the two ends of the check valve pipeline (201), the inner walls of the check valve pipeline (201) are located near the threads and are connected with the air inlet pipe (1) and the air outlet pipe (3) in a threaded way, and the check valve pipeline (201) is located at the joint of the check valve pipeline (201) and the air outlet pipe (3) and is fixedly provided with the sealing gasket (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320924602.0U CN220249030U (en) | 2023-04-23 | 2023-04-23 | Check valve for fuel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320924602.0U CN220249030U (en) | 2023-04-23 | 2023-04-23 | Check valve for fuel gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220249030U true CN220249030U (en) | 2023-12-26 |
Family
ID=89230909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320924602.0U Active CN220249030U (en) | 2023-04-23 | 2023-04-23 | Check valve for fuel gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220249030U (en) |
-
2023
- 2023-04-23 CN CN202320924602.0U patent/CN220249030U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |