CN211738138U - Natural gas pipeline safety valve - Google Patents
Natural gas pipeline safety valve Download PDFInfo
- Publication number
- CN211738138U CN211738138U CN202020357186.7U CN202020357186U CN211738138U CN 211738138 U CN211738138 U CN 211738138U CN 202020357186 U CN202020357186 U CN 202020357186U CN 211738138 U CN211738138 U CN 211738138U
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- cavity
- pipeline
- movable block
- natural gas
- valve body
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Abstract
The utility model discloses a natural gas line relief valve, including valve body, safety cover, loose plate, movable block, reference column. The valve body is provided with a sealing separation cavity and a flow guide cavity which are connected with each other, a movable block is arranged in the flow guide cavity, a movable plate is arranged in the sealing separation cavity, and under the normal condition, a medium in a pipeline can freely flow between the movable plate and a through hole in the movable block and an external pipeline; when the burning accident that leaks appears in the pipeline, pipeline pressure's change can make the movable block react rapidly and reduce medium flow or seal the pipeline, and the loose plate can thoroughly seal the pipeline after the temperature variation, and whole process response is sensitive, and reaction rate is fast, can effectively restrain the leakage and the burning of natural gas pipeline, and installs simple structure, and convenient to detach conveniently changes the part and maintains.
Description
Technical Field
The utility model relates to a natural gas conveying pipeline equipment technical field, especially a natural gas line relief valve.
Background
The natural gas is used as a clean energy product widely applied in modern industry and life, has the characteristics of flammability, explosiveness and instability, is usually and rapidly developed when an accident occurs, has extremely short interval from the occurrence of the accident to the occurrence of serious loss, and needs a standard and equipment with higher safety coefficient to manage and control the use of the natural gas.
At present, a common natural gas pipeline is mainly a pressure relief valve body, and can exhaust and relieve pressure under the condition of overhigh pressure in the pipeline. And when the body appeared leaking, conventional pressure relief formula relief valve was difficult to play the effect of cutting off the air current in the short time, and natural gas continuously leaked under this condition, if can not control leaking fast, in case the gas that leaks meets a fire and gets into the combustion state, the accident will develop rapidly and arouse great loss.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of current natural gas relief valve technical condition, the utility model provides a natural gas line relief valve.
The utility model relates to a natural gas pipeline safety valve, which comprises a valve body, a protective cover, a movable plate, a positioning column, wherein a sealing and isolating cavity and a diversion cavity which are respectively connected with an external pipeline are arranged inside the valve body, and the sealing and isolating cavity is connected with the diversion cavity through a pipeline; the protective cover is arranged outside the sealing cavity on the surface of the valve body, and a protective cover cap is arranged at the top of the protective cover; the movable plate is arranged in the sealed separation cavity and extends out of the surface of the valve body, a through hole is formed in the movable plate, the movable plate is connected with the sealed separation cavity through a spring, the movable plate is connected with the protection cover through a thermal fuse, and a sealing gasket is arranged between the movable plate and the contact surface of the valve body; the movable block is arranged in the flow guide cavity and is connected with the inner wall of the flow guide cavity through a spring, a through hole is arranged on the surface of the movable block, a positioning groove is arranged on the bottom surface of the movable block, a hollow groove is also arranged in the movable block, and the hollow groove is respectively communicated with the sealed cavity and the external pipeline through the through hole; the valve body surface still is provided with the reference column, the reference column is fixed on the valve body wall through fixed cover, and the reference column is provided with the column cap on water conservancy diversion chamber surface, the column cap links to each other with the reference column through the spring, and the column cap diameter is the same with constant head tank internal diameter.
Furthermore, the inner diameter of the through hole on the movable plate is the same as the inner diameter of the connecting pipeline of the flow guide cavity.
Furthermore, the inner diameter of the through hole on the movable block is respectively the same as the inner diameter of the sealing cavity connecting pipeline and the outer pipeline.
Further, when the movable plate is connected with the protective cover through the thermal fuse, the length of the connecting spring for sealing the cavity and the flow guide cavity is larger than the free length of the connecting spring, and the through hole of the movable plate is communicated with the flow guide cavity and the external pipeline.
Furthermore, when the hollow groove on the movable block is communicated with the sealing separation cavity and the external pipeline through the through hole respectively, the length of the connecting spring between the movable block and the flow guide cavity is smaller than the free length of the connecting spring, and the horizontal distance between the positioning groove and the column head is smaller than the horizontal distance between two through holes on the movable block, which are communicated with the external pipeline and the sealing separation cavity respectively.
The utility model has the advantages that:
1. the pressure difference feedback component and the thermal feedback component are used as the control mechanism of the valve body, so that when a natural gas pipeline has a leakage accident, the safety valve can quickly respond to the pressure difference generated during gas leakage and the temperature change generated during combustion, a gas leakage channel is automatically cut off, and the combustion of gas is prevented.
2. Safety devices such as loose plate and movable block use mobilizable stop component such as reference column and safety cover to fix a position the setting, and the maintenance is dismantled with the dismantlement to the restoration after the convenient to use, has reduced the maintenance cost.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is a schematic sectional view of the present invention in an operating state;
FIG. 3 is an enlarged view of a portion of the locating post;
in the figure, a valve body 1, a protective cover 2, a thermal fuse wire 21, a protective cover 22, a sealing washer 3, a movable plate 4, a sealing separation cavity 5, a movable block 6, a positioning groove 61, a diversion cavity 7, a positioning column 8, a column head 81 and a fixing sleeve 82 are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.
Example (b):
the valve body 1 is internally provided with a packing cavity 5 and a diversion cavity 7 which are respectively connected with an external pipeline, the packing cavity 5 is connected with the diversion cavity 7 through a pipeline, a protective cover 2 is arranged on the surface of the valve body 1 and outside the packing cavity 5, the top of the protective cover 2 is provided with a protective cover 22, a movable plate 4 is arranged in the packing cavity 5 and extends out of the surface of the valve body 1, the movable plate 4 is provided with a through hole and is connected with the packing cavity 5 through a spring, the movable plate 4 is connected with the protective cover 2 through a thermal fuse wire 21, a sealing gasket 3 is arranged between the contact surface of the movable plate 4 and the valve body 1, a movable block 6 is arranged in the diversion cavity 7 and is connected with the inner wall of the diversion cavity 7 through a spring, the surface of the movable block 6 is provided with a through hole, the bottom surface of the movable block is provided with a positioning groove 61, the interior of the movable block 6 is also provided with a hollow groove, the hollow groove is, the positioning column 8 is provided with a column head 81 on the surface of the flow guide cavity 7, the column head 81 is connected with the positioning column 8 through a spring, and the diameter of the column head 81 is the same as the inner diameter of the positioning groove 61.
When the utility model works, because the length of the connecting spring between the movable block 6 and the diversion cavity 7 is less than the free length, the movable block 6 is extruded by the spring, and the through holes of the movable block are respectively communicated with the packing cavity 5 and the through holes of the external pipelines; when the movable plate 4 is connected with the protective cover 2 through the thermal fuse wire 21, the length of the connecting spring of the packing cavity 5 and the flow guide cavity 7 is larger than the free length of the connecting spring, the spring is stretched by the thermal fuse wire 21, the through hole of the movable plate 4 is communicated with the flow guide cavity 7 and the through hole of the external pipeline, and a medium conveyed in the pipeline can flow through the through hole and the hollow groove, so that the whole valve forms a passage, and the medium in the pipeline can freely pass through the safety valve.
When the pipeline appears damaged, medium pressure in the pipeline will appear changing, the powerful pressure differential that the pipeline damage brought can make the movable block 6 promote spring motion in water conservancy diversion chamber 7 under the effect of medium, until pushing away the constant head tank 61 of movable block 6 bottom to fixed with column cap 81 block, and because when the hollow groove on the movable block 6 communicates with packing chamber 5 and external pipeline warp through-hole respectively, the horizontal distance between constant head tank 61 and the column cap 81 is less than the horizontal distance between the two through-holes that communicate respectively with external pipeline and packing chamber 5 on the movable block 6, when column cap 81 fixes movable block 6, through-hole on the movable block 6 will separate with external pipeline through-hole completely, make the medium can't continue to flow, thereby play the effect that prevents the leakage.
When pipeline damage and conflagration appear simultaneously, pipeline pressure differential is at first acted on movable block 6, can reduce the medium flow rapidly in order to restrain the intensity of a fire and spread, simultaneously the interior temperature of pipeline risees gradually, make hot fuse 21 fusing, movable plate 4 is pulled by reset spring and takes place the displacement, through-hole on the movable plate 4 is separated completely with the through-hole of external pipeline and water conservancy diversion chamber 7, thereby thoroughly cut off the medium and flow, and simultaneously, if the pressure differential of leaking is big enough, movable block 6 can directly get into the block state even, effectively restrict the accident and further develop. Compared with slow heat transfer, the change speed of the pressure difference is higher, the feedback of the device is more obvious, and the reaction speed of the stopping action is higher under the action of the pressure type stopping equipment, so that more precious time can be strived for accident control.
After the safety valve is used, the safety valve can be put into a use state again only by pulling out the fixing sleeve 82 and opening the protective cover 22 to replace the thermal fuse 21, and the safety valve is simple in structure and convenient to maintain and disassemble.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A natural gas pipeline safety valve comprises a valve body (1), a protective cover (2), a movable plate (4), a movable block (6) and a positioning column (8), and is characterized in that a sealing and isolating cavity (5) and a flow guide cavity (7) which are respectively connected with an external pipeline are arranged inside the valve body (1), and the sealing and isolating cavity (5) is connected with the flow guide cavity (7) through a pipeline; the protective cover (2) is arranged on the outer side of the surface sealing separation cavity (5) of the valve body (1), and a protective cover cap (22) is arranged at the top of the protective cover (2); the movable plate (4) is arranged in the sealed partition cavity (5) and extends out of the surface of the valve body (1), a through hole is formed in the movable plate (4), the movable plate (4) is connected with the sealed partition cavity (5) through a spring, and the movable plate (4) is connected with the protective cover (2) through a thermal fuse (21); the movable block (6) is arranged in the flow guide cavity (7) and is connected with the inner wall of the flow guide cavity (7) through a spring, a through hole is formed in the surface of the movable block (6), a positioning groove (61) is formed in the bottom surface of the movable block, a hollow groove is further formed in the movable block (6), and the hollow groove is respectively communicated with the packing cavity (5) and an external pipeline through the through hole; the surface of the valve body (1) is also provided with a positioning column (8), and the positioning column (8) is fixed on the wall of the valve body (1) through a fixing sleeve (82).
2. A natural gas pipeline safety valve according to claim 1, wherein: the inner diameter of the through hole on the movable plate (4) is the same as that of the connecting pipeline of the diversion cavity (7).
3. A natural gas pipeline safety valve according to claim 1, wherein: the inner diameter of the through hole on the movable block (6) is respectively the same as the inner diameter of the connecting pipeline and the external pipeline of the packing cavity (5).
4. A natural gas pipeline safety valve according to claim 1, wherein: column cap (81) is arranged on the surface of the diversion cavity (7) of the positioning column (8), the column cap (81) is connected with the positioning column (8) through a spring, and the diameter of the column cap (81) is the same as the inner diameter of the positioning groove (61).
5. A natural gas pipeline safety valve according to claim 1, wherein: when loose plate (4) and safety cover (2) link to each other through hot fuse (21), seal and separate chamber (5) and water conservancy diversion chamber (7) connecting spring length and be greater than its free length, loose plate (4) through-hole intercommunication water conservancy diversion chamber (7) and external pipeline.
6. A natural gas pipeline safety valve according to claim 1, wherein: a sealing gasket (3) is arranged between the contact surfaces of the movable plate (4) and the valve body (1).
7. A natural gas pipeline safety valve according to claim 3, wherein: when the hollow groove on the movable block (6) is communicated with the sealing and separating cavity (5) and the external pipeline through the through holes respectively, the length of a connecting spring between the movable block (6) and the flow guide cavity (7) is smaller than the free length of the connecting spring, and the horizontal distance between the positioning groove (61) and the column head (81) is smaller than the horizontal distance between the two through holes on the movable block (6) which are communicated with the external pipeline and the sealing and separating cavity (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357186.7U CN211738138U (en) | 2020-03-20 | 2020-03-20 | Natural gas pipeline safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357186.7U CN211738138U (en) | 2020-03-20 | 2020-03-20 | Natural gas pipeline safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211738138U true CN211738138U (en) | 2020-10-23 |
Family
ID=72853444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020357186.7U Expired - Fee Related CN211738138U (en) | 2020-03-20 | 2020-03-20 | Natural gas pipeline safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211738138U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115218204A (en) * | 2022-09-20 | 2022-10-21 | 山西国新科莱天然气有限公司 | Natural gas emptying devices |
-
2020
- 2020-03-20 CN CN202020357186.7U patent/CN211738138U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115218204A (en) * | 2022-09-20 | 2022-10-21 | 山西国新科莱天然气有限公司 | Natural gas emptying devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201023 Termination date: 20210320 |
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| CF01 | Termination of patent right due to non-payment of annual fee |