CN220600556U - Tempering-proof natural gas safety valve - Google Patents
Tempering-proof natural gas safety valve Download PDFInfo
- Publication number
- CN220600556U CN220600556U CN202322207179.5U CN202322207179U CN220600556U CN 220600556 U CN220600556 U CN 220600556U CN 202322207179 U CN202322207179 U CN 202322207179U CN 220600556 U CN220600556 U CN 220600556U
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- Prior art keywords
- pipe
- fixedly connected
- upper side
- natural gas
- flame
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003345 natural gas Substances 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 239000003063 flame retardant Substances 0.000 claims abstract description 6
- 238000005496 tempering Methods 0.000 claims description 5
- 230000009970 fire resistant effect Effects 0.000 claims 3
- 239000007789 gas Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Gas Burners (AREA)
Abstract
The utility model relates to an anti-backfire natural gas safety valve, which comprises a one-way valve arranged in a pipe body, wherein an output joint is fixed at the bottom of the pipe body, an inner pipe is fixedly connected to the top of the pipe body, a circular ring sealing element is fixedly connected to the bottom of the inner pipe, a cylindrical supporting element is arranged above the output joint, a blocking block is arranged in the supporting element, a connecting rod is fixedly connected to the upper side of the blocking block, the top end of the connecting rod penetrates through the supporting element and is fixedly connected with a pressing plate, the lower side of the pressing plate can be contacted with the upper side of the circular ring sealing element, and a fire-resisting pipe is arranged outside the inner pipe. Through the setting of fire-retardant pipe, can be when flame spreading to outer fringe passageway inside, play the effect that the flame that the separation was rewound and extinguish the flame through the fire-retardant pipe, and the shutoff piece downside contacts with output joint upside, plays the effect of extinguishing the flame in the low reaches pipeline, and the clamp plate moves down and contacts with the ring sealing member, plays the effect of stopping gaseous forward inflow, avoids the gas to enter into in the outer fringe passageway to this prevents flame spreading.
Description
Technical Field
The utility model relates to a safety valve technology, in particular to an anti-backfire natural gas safety valve.
Background
In the prior art, when the pressure in the pipe is reduced under the condition of accident or unstable system, the fire of the combustion point can spread to the direction of the air source through the pipeline, called tempering, so that most of the prior art uses an anti-tempering natural gas safety valve to play a role of preventing tempering, and is arranged at the rear connecting pipe of the acetylene pressure gauge.
Existing anti-flashback natural gas safety valves often do not facilitate preventing flame propagation by preventing forward inflow of gas when flame propagates inside the anti-flashback natural gas safety valve.
Disclosure of Invention
The utility model aims to provide an anti-backfire natural gas safety valve, which is used for solving the problem that the existing anti-backfire natural gas safety valve is inconvenient to prevent flame from spreading by preventing forward inflow of gas when flame spreads into the anti-backfire natural gas safety valve.
In order to solve the problems, the utility model provides an anti-backfire natural gas safety valve, which comprises a one-way valve arranged in a pipe body, wherein an output joint is fixed at the bottom of the pipe body, an inner pipe is fixedly connected to the top of the pipe body, a circular ring sealing member is fixedly connected to the bottom of the inner pipe, a cylindrical supporting member is arranged above the output joint, a blocking block is arranged in the supporting member, a connecting rod is fixedly connected to the upper side of the blocking block, the top end of the connecting rod penetrates through the supporting member and is fixedly connected with a pressing plate, the lower side of the pressing plate can be contacted with the upper side of the circular ring sealing member, a fire-resisting pipe is arranged on the outer side of the inner pipe, the bottom of the fire-resisting pipe is contacted with the supporting member, and an outer edge channel is formed between the fire-resisting pipe and the pipe body.
The tempering-resistant natural gas safety valve provided by the utility model also has the following technical characteristics:
further, the bottom of support piece is fixed with the connecting block, and the one end that the connecting block kept away from support piece is fixed connection with body inner wall.
Further, the bottom of the blocking piece is fixedly connected with the supporting piece through the fusible connecting piece, the upper side of the blocking piece is connected with the top of the supporting piece through the pressure spring, the lower side of the blocking piece can be contacted with the upper side of the output connector, and the inner wall of the output connector is fixedly provided with a fire-retardant plate.
Further, the ring sealing member includes ring plate and sealing washer, ring plate and inner tube fixed connection, and sealing washer fixed connection is in ring plate upside, and the clamp plate downside can be with the sealing washer contact.
Further, the bottom of the pipe body is fixedly connected with an input connector, and a filter is arranged on the upper side of the pipe body.
Further, the check valve comprises a fixed pipe, a convex cylinder, an annular sealing gasket, a support plate and a spring, wherein the support plate is fixedly connected to the inner wall of the inner pipe, a through hole is formed in the support plate, the upper side of the support plate is connected with the bottom of the convex cylinder through the spring, the fixed pipe is fixedly connected to the inner wall of the inner pipe, the convex cylinder is slidably connected with the inner wall of the fixed pipe, the annular sealing gasket is fixedly connected to the stepped surface of the convex cylinder, the upper side of the annular sealing gasket can be in contact with the bottom of the fixed pipe, a connecting hole is formed in the convex cylinder, and the connecting hole can be communicated with an outer edge channel.
The utility model has the following beneficial effects: through the setting of fire-retardant pipe, can be when flame spreading to outer fringe passageway inside, play the effect that the flame that the separation was rewound and extinguish the flame through the fire-retardant pipe, and the shutoff piece downside contacts with output joint upside, plays the effect of extinguishing the flame in the low reaches pipeline, and the clamp plate moves down and contacts with the ring sealing member, plays the effect of stopping gaseous forward inflow, avoids the gas to enter into in the outer fringe passageway to this prevents flame spreading.
Drawings
FIG. 1 is an isometric view of an embodiment of the present utility model;
FIG. 2 is an isometric view of an embodiment of the present utility model with a tube removed;
FIG. 3 is a front cut-away view of an embodiment of the present utility model;
fig. 4 is an enlarged schematic view of the structure of fig. 3 a according to an embodiment of the present utility model.
Detailed Description
The utility model will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the embodiment of the anti-backfire natural gas safety valve according to the present utility model shown in fig. 1 to 4, the anti-backfire natural gas safety valve comprises a one-way valve 2 installed inside a pipe body 1, the one-way valve 2 only allows gas to pass through unidirectionally, mixed gas is prevented from entering an upstream pipeline, an output joint 3 is fixed at the bottom of the pipe body 1, an inner pipe 4 is fixedly connected to the top of the pipe body 1, a ring sealing member 5 is fixedly connected to the bottom of the inner pipe 4, a cylindrical supporting member 6 is arranged above the output joint 3, a blocking block 7 is arranged in the supporting member 6, a connecting rod 8 is fixedly connected to the upper side of the blocking block 7, the top end of the connecting rod 8 penetrates through the supporting member 6 and is fixedly connected with a pressing plate 9, the lower side of the pressing plate 9 can be in contact with the upper side of the ring sealing member 5, a flame-extinguishing channel 11 is formed between the bottom of the flame-retarding pipe 10 and the pipe body 1, when the flame-retarding pipe 10 extends into the outer peripheral channel 11, the flame-retarding pipe 10 plays a role of blocking the flame and the surrounding flame and moves to the upper side of the outer edge of the output joint 3, and the flame-retarding flame flows into the ring sealing member 5 is prevented from entering the inner side of the ring sealing member through the sealing member.
In one embodiment of the present application, preferably, the bottom of the supporting element 6 is fixed with a connecting block 12, and one end of the connecting block 12 away from the supporting element 6 is fixedly connected with the inner wall of the pipe body 1, so that the supporting element 6 can be relatively fixed with the pipe body 1, and a gap is left between the supporting element 6 and the pipe body 1, so that weather can pass through.
In one embodiment of the present application, preferably, the bottom of the blocking piece 7 is fixedly connected with the supporting piece 6 through the fusible connecting piece 13, the material of the connecting piece 13 is silver, the upper side of the blocking piece 7 is connected with the top of the supporting piece 6 through the pressure spring 14, the lower side of the blocking piece 7 can be contacted with the upper side of the output joint 3, the fire-retarding plate 15 is fixed on the inner wall of the output joint 3, the fire-retarding plate 15 and the fire-retarding pipe 10 are both composed of sintered metal, fine pores of the fire-retarding plate 15 can pass through gas and can block the circumfluence flame, the flame temperature is rapidly reduced below a fire point so as to extinguish the flame, if the flame continuously burns, the connecting piece 13 can be fused, so that the lower side of the blocking piece 7 is driven to be contacted with the upper side of the output joint 3 under the action of the pressure spring 14, the flame in a downstream pipeline is extinguished, and the pressure plate 9 is driven to be contacted with the circular sealing piece 5, the effect of preventing the forward inflow of the gas is prevented, and the flame is prevented from spreading by preventing the gas from entering the outer edge channel 11.
In one embodiment of the present application, preferably, the annular sealing member 5 includes an annular plate 51 and a sealing ring 52, the annular plate 51 is fixedly connected with the inner tube 4, the sealing ring 52 is fixedly connected to the upper side of the annular plate 51, the lower side of the pressing plate 9 can be in contact with the sealing ring 52, and the sealing ring 52 plays a role in sealing.
In one embodiment of the present application, preferably, the bottom of the pipe body 1 is fixedly connected with an input connector 16, a filter 17 is disposed on the upper side of the pipe body 1, the input connector 16 can be communicated with an upstream pipeline, and the filter 17 plays a role in filtering gas.
In one embodiment of the present application, preferably, the check valve 2 includes a fixed tube 21, a convex cylinder 22, an annular gasket 23, a support plate 24 and a spring 25, the support plate 24 is fixedly connected to the inner wall of the inner tube 4, a through hole is formed in the support plate 24, the through hole is configured to facilitate gas passing through, the upper side of the support plate 24 is connected to the bottom of the convex cylinder 22 through the spring 25, the fixed tube 21 is fixedly connected to the inner wall of the inner tube 4, the convex cylinder 22 is slidably connected to the inner wall of the fixed tube 21, the annular gasket 23 is fixedly connected to a stepped surface of the convex cylinder 22, the upper side of the annular gasket 23 is contactable with the bottom of the fixed tube 21, a connecting hole is formed in the convex cylinder 22 and is communicable with the outer edge channel 11, when the upper side of the annular gasket 23 contacts with the bottom of the fixed tube 21, the connecting hole is communicable with the input connector 16, the inner wall of the fixed tube 21 is blocked to the connecting hole, and when gas circulates from the convex cylinder 22 so that the convex cylinder 22 moves downward on the fixed tube 21, the spring 25 compresses, and the connecting hole is communicable with the outer edge channel 11.
When the gas pressure in the pipe is reduced, the flame is firstly blocked by the fire-blocking plate 15 when the gas is spread into the device through the downstream pipe, the flame still enters the outer edge channel 11 through the fire-blocking plate 15 after being blocked, the flame temperature is quickly reduced to be below a fire point through the flame-blocking pipe 10, so that the flame is extinguished, if the flame is continuously combusted, the lower side of the connecting piece 7 can be driven to contact with the upper side of the output joint 3 under the action of the pressure spring 14, the lower side of the connecting piece 13 can be contacted with the upper side of the output joint 3, the effect of the pressure plate 9 in the downstream pipe is achieved, and the flame is prevented from entering the sealing ring 11 through the effect of the fire-blocking plate 15, so that the flame is prevented from entering the sealing ring 5 when the gas pressure in the pipe is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (6)
1. The tempering-resistant natural gas safety valve comprises a one-way valve (2) arranged inside a pipe body (1), and is characterized in that an output joint (3) is fixed at the bottom of the pipe body (1), an inner pipe (4) is fixedly connected to the top of the pipe body (1), a circular ring sealing piece (5) is fixedly connected to the bottom of the inner pipe (4), a cylindrical supporting piece (6) is arranged above the output joint (3), a blocking block (7) is arranged in the supporting piece (6), a connecting rod (8) is fixedly connected to the upper side of the blocking block (7), the top end of the connecting rod (8) penetrates through the supporting piece (6) and is fixedly connected with a pressing plate (9), the lower side of the pressing plate (9) can be contacted with the upper side of the circular ring sealing piece (5), a fire-resistant pipe (10) is arranged on the outer side of the inner pipe (4), the bottom of the fire-resistant pipe (10) is contacted with the supporting piece (6), and an outer edge channel (11) is formed between the fire-resistant pipe (10) and the pipe body (1).
2. The anti-flashback natural gas safety valve according to claim 1, wherein: the bottom of the support piece (6) is fixedly provided with a connecting block (12), and one end, far away from the support piece (6), of the connecting block (12) is fixedly connected with the inner wall of the pipe body (1).
3. The anti-flashback natural gas safety valve according to claim 1, wherein: the bottom of the blocking block (7) is fixedly connected with the supporting piece (6) through a fusible connecting piece (13), the upper side of the blocking block (7) is connected with the top of the supporting piece (6) through a pressure spring (14), the lower side of the blocking block (7) can be contacted with the upper side of the output connector (3), and a fire-retardant plate (15) is fixed on the inner wall of the output connector (3).
4. The anti-flashback natural gas safety valve according to claim 1, wherein: the ring sealing piece (5) comprises a ring plate (51) and a sealing ring (52), the ring plate (51) is fixedly connected with the inner pipe (4), the sealing ring (52) is fixedly connected to the upper side of the ring plate (51), and the lower side of the pressing plate (9) can be in contact with the sealing ring (52).
5. The anti-flashback natural gas safety valve according to claim 1, wherein: the bottom of the pipe body (1) is fixedly connected with an input connector (16), and a filter (17) is arranged on the upper side of the pipe body (1).
6. The anti-flashback natural gas safety valve according to claim 1, wherein: the check valve (2) comprises a fixed pipe (21), a convex cylinder (22), an annular sealing gasket (23), a support plate (24) and a spring (25), wherein the support plate (24) is fixedly connected to the inner wall of the inner pipe (4), a through hole is formed in the support plate (24), the upper side of the support plate (24) is connected with the bottom of the convex cylinder (22) through the spring (25), the fixed pipe (21) is fixedly connected to the inner wall of the inner pipe (4), the convex cylinder (22) is slidably connected with the inner wall of the fixed pipe (21), the annular sealing gasket (23) is fixedly connected to the stepped surface of the convex cylinder (22), the upper side of the annular sealing gasket (23) can be in contact with the bottom of the fixed pipe (21), and a connecting hole is formed in the convex cylinder (22) and can be communicated with an outer edge channel (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322207179.5U CN220600556U (en) | 2023-08-16 | 2023-08-16 | Tempering-proof natural gas safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322207179.5U CN220600556U (en) | 2023-08-16 | 2023-08-16 | Tempering-proof natural gas safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220600556U true CN220600556U (en) | 2024-03-15 |
Family
ID=90174064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322207179.5U Active CN220600556U (en) | 2023-08-16 | 2023-08-16 | Tempering-proof natural gas safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220600556U (en) |
-
2023
- 2023-08-16 CN CN202322207179.5U patent/CN220600556U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |