CN217683403U - Automatic gas cutting-off device for fire disaster of natural gas distribution and transmission station - Google Patents
Automatic gas cutting-off device for fire disaster of natural gas distribution and transmission station Download PDFInfo
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- CN217683403U CN217683403U CN202221430542.9U CN202221430542U CN217683403U CN 217683403 U CN217683403 U CN 217683403U CN 202221430542 U CN202221430542 U CN 202221430542U CN 217683403 U CN217683403 U CN 217683403U
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Abstract
The utility model discloses a natural gas divides automatic device of cutting off gas of defeated station conflagration, including main gas transmission pipeline (1), be provided with branch gas transmission pipeline (2) on main gas transmission pipeline (1), it opens formula check valve (6) and low reaches to open formula check valve (7) soon to divide to be provided with the upper reaches on gas transmission pipeline (2), it still is provided with between formula check valve (6) and low reaches open formula check valve (7) to divide defeated station (3) soon, it includes that upper reaches unloading is assisted pipe (8) and downstream unloading is assisted pipe (9) to divide defeated station (3), upper reaches unloading is assisted and is provided with temperature sensitive automatic air-break valve (5) between pipe (8) and the downstream unloading is assisted pipe (9). The utility model discloses when dividing defeated station (3) conflagration to take place, but automatic cutout divides defeated gas pipeline (2), can prevent effectively that the natural gas from flowing to the conflagration point, has guaranteed the security that divides defeated station (3) to a very big degree.
Description
Technical Field
The utility model relates to a natural gas emergency repair gas-break technical field especially relates to a natural gas divides defeated station conflagration automatic gas-break device.
Background
Natural gas refers to commercial hydrocarbon gas that is naturally underground and is artificially mined to the surface, and includes oil field gas, gas field gas, coal bed gas, shale gas and the like. The natural gas sub-transmission station is responsible for continuously transmitting the natural gas of the upstream natural gas transmission main pipeline to the downstream sub-pipeline after pressure regulation, metering and treatment. If fire breaks out in the sub-transportation station, the gas transmission pipeline in the sub-transportation station can explode, crack and leak. The upstream natural gas which is still continuously conveyed can be sprayed out through the fracture to increase fire hazard, and the natural gas of the downstream pipeline can flow back out of the fracture to increase fire hazard, and even the downstream pipeline enters air to cause backfire explosion in the pipeline. It is therefore necessary to shut off the upstream and downstream gas lines in time, especially in the case of an unattended distribution station, in the event of a fire in the distribution station. Various electrical signal controlled shutoff valve assemblies are subject to failure at high temperatures, and therefore a reliable automatic shutoff device that is resistant to fire high temperatures is needed as a supplement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a natural gas divides automatic disconnected gas device of defeated station conflagration to solve when the natural gas divides the defeated station of interior conflagration that takes place, how in time cut off the technical problem of the gas transmission pipeline in upper reaches, low reaches.
The utility model aims at adopting the following technical scheme to realize: the utility model provides an automatic gas cut-off device of natural gas branch transmission station conflagration, includes main gas transmission pipeline, be provided with branch gas transmission pipeline on the main gas transmission pipeline, be provided with upper reaches swing check valve and low reaches swing check valve on the branch gas transmission pipeline, still be provided with branch transmission station between upper reaches swing check valve and the low reaches swing check valve, branch transmission station is including upper reaches unloading auxiliary pipe and low reaches unloading auxiliary pipe, be provided with the sensitive automatic gas cut-off valve of temperature between upper reaches unloading auxiliary pipe and the low reaches unloading auxiliary pipe.
Furthermore, the branch gas transmission pipeline is also provided with a main gas inlet valve at a position close to the main gas transmission pipeline.
Furthermore, the temperature-sensitive automatic air shutoff valve comprises a temperature-sensitive automatic air shutoff valve body, a temperature-sensitive automatic air shutoff valve core is arranged in a cavity of the temperature-sensitive automatic air shutoff valve body, the temperature-sensitive automatic air shutoff valve core is fixed on the bearing rod through the central rod, and the bearing rod is fixed on the temperature-sensitive automatic air shutoff valve body through the bearing rod seat.
Further, a temperature-sensitive automatic air-break valve cover is arranged at the upper end of the temperature-sensitive automatic air-break valve body, and a temperature-sensitive automatic air-break valve sealing ring and a temperature-sensitive automatic air-break valve sealing gasket are arranged between the temperature-sensitive automatic air-break valve body and the temperature-sensitive automatic air-break valve cover; the temperature-sensitive automatic air-break valve comprises a temperature-sensitive automatic air-break valve body and is characterized in that a temperature-sensitive automatic air-break valve seat is arranged at the lower end of the temperature-sensitive automatic air-break valve body, and a temperature-sensitive automatic air-break valve flange used for fixing the temperature-sensitive automatic air-break valve is arranged on the temperature-sensitive automatic air-break valve seat.
Furthermore, the downstream swing check valve comprises a downstream swing check valve body, a downstream swing check valve plate is arranged in a cavity of the downstream swing check valve body, and the downstream swing check valve plate is fixed on the downstream swing check valve body through a downstream swing check valve plate shaft.
Furthermore, a downstream swing check valve cover is arranged at the upper end of the downstream swing check valve body, and a downstream swing check valve sealing ring and a downstream swing check valve sealing gasket are arranged between the downstream swing check valve body and the downstream swing check valve cover; the lower extreme of low reaches swing check valve body is provided with the low reaches swing check valve disk seat, be provided with the low reaches swing check valve flange that is used for fixed low reaches swing check valve on the low reaches swing check valve disk seat.
Furthermore, the upstream swing check valve comprises an upstream swing check valve body, an upstream swing check valve plate and a fixing mechanism for locking the upstream swing check valve plate are arranged in a cavity of the upstream swing check valve body, the valve plate of the upstream swing check valve is fixed on the valve body of the upstream swing check valve through the valve plate shaft of the upstream swing check valve in a twisting manner, and the fixing mechanism is arranged below the valve plate of the upstream swing check valve.
Further, the fixed establishment includes the spring bolt, the spring bolt is fixed in on the upper reaches swing check valve body through the spring bolt axle, still be provided with spring and recovery mechanism on the spring bolt.
Further, the recovery mechanism comprises a steel wire, the steel wire is fixed on the lock tongue, a steel wire pull ring is arranged on the steel wire, the steel wire pull ring extends to the outer side of the upstream swing check valve body, and a heavy ball is hung on the steel wire pull ring.
Furthermore, an upstream swing check valve cover is arranged at the upper end of the upstream swing check valve body, and an upstream swing check valve sealing ring and an upstream swing check valve sealing gasket are arranged between the upstream swing check valve body and the upstream swing check valve cover; the upper stream swing check valve body lower extreme is provided with the upper stream swing check valve disk seat, be provided with the upper stream swing check valve flange that is used for fixed upper stream swing check valve on the upper stream swing check valve disk seat.
The beneficial effects of the utility model reside in that: when a fire disaster occurs in the natural gas distribution station, the pipeline gas transmission is cut off in time through the temperature sensitive automatic gas-cutting valve, the upstream pipeline is cut off automatically through the upstream swing check valve so as to prevent the upstream from supplying gas to the fire disaster area, and the downstream pipeline is cut off automatically through the downstream swing check valve so as to prevent the natural gas in the downstream pipeline from flowing back to the fire disaster area to supply gas and prevent the air from entering the downstream pipeline to cause backfire explosion, thereby ensuring the safety of the natural gas distribution station to the utmost extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic diagram of a temperature-sensitive automatic air shutoff valve;
FIG. 3 is a diagram of a temperature sensitive automatic air shutoff valve shut-off state;
FIG. 4 is a schematic view of a downstream swing check valve configuration;
FIG. 5 is a schematic view of an upstream swing check valve configuration;
FIG. 6 is a cut-off state diagram of the upstream swing check valve;
FIG. 7 is a flow chart of the upstream swing check valve closing process;
FIG. 8 is a view of the upstream swing check valve in a reset condition;
in the figure, 1-main gas pipeline, 2-branch gas pipeline, 3-branch gas pipeline, 4-main gas inlet valve, 5-temperature sensitive automatic air-break valve, 6-upstream swing check valve, 7-downstream swing check valve, 8-upstream air-release auxiliary pipe, 9-downstream air-release auxiliary pipe, 10-temperature sensitive automatic air-break valve cover, 11-support rod, 12-temperature sensitive automatic air-break valve sealing ring, 13-temperature sensitive automatic air-break valve sealing gasket, 14-jack, 15-support rod seat, 16-center rod, 17-temperature sensitive automatic air-break valve core, 18-temperature sensitive automatic air-break valve body, 19-temperature sensitive automatic air-break valve seat, 20-temperature sensitive automatic air-break valve flange, 21-downstream swing check valve cover, 22-downstream swing check valve sealing ring, 23-downstream swing check valve sealing gasket, 24-downstream swing check valve flange, 25-downstream swing check valve plate, 26-downstream swing valve cover shaft, 27-downstream check valve sealing ring, 28-downstream swing check valve seat, 28-upstream swing check valve seat, 35-upstream swing check valve sealing gasket, 35-upstream swing check valve seat, 35-upstream swing check valve sealing ring, 35-upstream swing check valve sealing gasket, 35-upstream swing check valve seat, 35-upstream spring-upstream swing check valve sealing ring, 35-upstream spring-swing check valve seat, 35-upstream spring-upstream swing check valve sealing gasket, 35-downstream swing check valve seat, 41-steel wire pull ring, 42-hook, 43-heavy ball, 44-upstream swing check valve flange.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
referring to fig. 1-5, the automatic fire gas shutoff device for the natural gas branch transmission station comprises a main gas transmission pipeline 1, a branch gas transmission pipeline 2 is arranged on the main gas transmission pipeline 1, an upstream swing check valve 6 and a downstream swing check valve 7 are arranged on the branch gas transmission pipeline 2, a branch transmission station 3 is further arranged between the upstream swing check valve 6 and the downstream swing check valve 7, the branch transmission station 3 comprises an upstream auxiliary emptying pipe 8 and a downstream auxiliary emptying pipe 9, and a temperature sensitive automatic gas shutoff valve 5 is arranged between the upstream auxiliary emptying pipe 8 and the downstream auxiliary emptying pipe 9 (if the area of the branch transmission station 3 is large, a plurality of temperature sensitive automatic gas shutoff valves 5 can be installed in series at a certain distance to improve the reliability and sensitivity of the automatic fire gas shutoff device for the natural gas branch transmission station).
In the present embodiment, the branch gas transmission pipeline 2 is further provided with a main gas transmission pipeline 1 at a position close to the main gas transmission pipeline 4.
In this embodiment, the temperature-sensitive automatic air shutoff valve 5 includes a temperature-sensitive automatic air shutoff valve body 18, a temperature-sensitive automatic air shutoff valve core 17 is disposed in a cavity of the temperature-sensitive automatic air shutoff valve body 18, the temperature-sensitive automatic air shutoff valve core 17 is fixed on the support rod 11 through the central rod 16, and the support rod 11 is fixed on the temperature-sensitive automatic air shutoff valve body 18 through the support rod seat 15. Further, the support rod 11 is inserted into the insertion hole 14 of the central rod 16.
In this embodiment, the upper end of the temperature-sensitive automatic air-break valve body 18 is provided with a temperature-sensitive automatic air-break valve cover 10, and a temperature-sensitive automatic air-break valve sealing ring 12 and a temperature-sensitive automatic air-break valve sealing gasket 13 are further arranged between the temperature-sensitive automatic air-break valve body 18 and the temperature-sensitive automatic air-break valve cover 10; the lower end of the temperature sensitive automatic air-break valve body 18 is provided with a temperature sensitive automatic air-break valve seat 19, and the temperature sensitive automatic air-break valve seat 19 is provided with a temperature sensitive automatic air-break valve flange 20 for fixing the temperature sensitive automatic air-break valve 5.
Further, the temperature-sensitive automatic air-break valve 5 is a valve member which is automatically closed when the temperature of the valve body reaches 300 ℃, under the normal condition, referring to fig. 2, the bearing rod 11 is inserted into the insertion hole 14 of the central rod 16, two ends of the bearing rod 11 are fixed on the bearing rod seat 15 on the inner wall of the temperature-sensitive automatic air-break valve body 18, and the bearing rod seat 15 bears the temperature-sensitive automatic air-break valve core 17 above the cavity of the temperature-sensitive automatic air-break valve body 18, so that the lower flow channel (the branch gas transmission pipeline 2) is ensured to be unblocked. When the external temperature rises to 300 ℃, the temperature of 300 ℃ does not cause any damage to the gas transmission pipeline, the supporting rod 11 made of lead-tin low-melting-point alloy is fused, the valve core 17 of the temperature-sensitive automatic gas-cut-off valve falls onto the valve seat 19 of the temperature-sensitive automatic gas-cut-off valve, and the gas transmission pipeline 2 is closed, so that the natural gas transmission is cut off, and particularly, the cutting-off state of the temperature-sensitive automatic gas-cut-off valve 5 can be referred to fig. 3. After the fire disaster is over, the air inlet main valve 4 is closed, the upstream emptying auxiliary pipe 8 and the downstream emptying auxiliary pipe 9 are opened, and high-pressure natural gas in the pipe sections from the temperature sensitive automatic air-break valve 5 to the upstream swing check valve 6 and the downstream swing check valve 7 is led to a safe place to be emptied and ignited. And then opening the valve cover 10 of the temperature-sensitive automatic air-break valve, taking out the valve core 17 of the temperature-sensitive automatic air-break valve and the residual bearing rod 11, cleaning internal residues, replacing a new bearing rod 11, and reinstalling the valve cover 10 of the temperature-sensitive automatic air-break valve.
In this embodiment, the downstream swing check valve 7 functions to cut off the branch gas transmission pipeline 2 by the temperature sensitive automatic air cut-off valve 5 in case of a fire, and the downstream swing check valve 7 located in a non-fire area automatically cuts off the downstream pipeline to prevent natural gas in the downstream pipeline from flowing back to the fire area for gas supply and prevent air from entering the downstream pipeline to cause backfire explosion. Further, the downstream swing check valve 7 includes a downstream swing check valve body 28, a downstream swing check valve plate 25 is disposed in a cavity of the downstream swing check valve body 28, and the downstream swing check valve plate 25 is fixed to the downstream swing check valve body 28 by a downstream swing check valve plate shaft 26.
In the present embodiment, the downstream swing check valve body 28 is provided with a downstream swing check valve cover 21 at the upper end thereof, and a downstream swing check valve seal ring 22 and a downstream swing check valve seal gasket 23 are provided between the downstream swing check valve body 28 and the downstream swing check valve cover 21; the lower end of the downstream swing check valve body 28 is provided with a downstream swing check valve seat 27, and a downstream swing check valve flange 24 for fixing the downstream swing check valve 7 is arranged on the downstream swing check valve seat 27.
Further, when the temperature sensitive automatic gas shutoff valve 5 is once closed, the natural gas in the gas distribution pipeline 2 stops flowing, the impulsive force of the flowing natural gas acting on the downstream swing check valve plate 25 disappears, and the downstream swing check valve plate 25 rotates under the action of gravity and falls down to the downstream swing check valve seat 27, so that the gas distribution pipeline 2 is automatically shut off. If the branch gas transmission pipeline 2 between the temperature sensitive automatic air-cut valve 5 and the downstream swing check valve 7 is broken, the pipeline natural gas is discharged to reduce the pressure, the pressure is lower than the pressure in the pipeline below the downstream swing check valve 7, so that a positive pressure difference acts on the back surface of the downstream swing check valve plate 25 to tightly press the downstream swing check valve plate 25 on the downstream swing check valve seat 27, the downstream swing check valve plate 25 is ensured not to be opened any more, because the downstream swing check valve 7 is arranged at a certain distance outside the branch gas transmission station 3, the position is outside a fire area, the closing of the downstream swing check valve 7 cuts off the connection between the downstream branch gas transmission pipeline 2 and the fire area, normal gas supply is recovered after the fire, the pressure of the upstream branch gas transmission pipeline 2 is higher than the pressure of the downstream branch gas transmission pipeline 2, and the downstream swing check valve plate 25 is automatically opened to realize gas transmission.
In this embodiment, the function of the upstream swing check valve 6 is that when a fire occurs, even if the temperature sensitive automatic gas shutoff valve 5 cuts off the branch gas transmission pipeline 2, an external fire caused by other combustible materials may continue and destroy a pipeline somewhere upstream or downstream of the temperature sensitive automatic gas shutoff valve, so that natural gas in the upstream pipeline or the downstream pipeline is ejected from the cut-off, and the fire hazard is increased. An upstream swing check valve 6 is installed at a certain distance from the branch transmission station, and in case of a fire, the upstream swing check valve 6 in a non-fire area automatically cuts off an upstream pipe to prevent the upstream from supplying air to the fire area. Further, the upstream swing check valve 6 includes an upstream swing check valve body 32, an upstream swing check valve plate 35 and a fixing mechanism for locking the upstream swing check valve plate 35 are disposed in a cavity of the upstream swing check valve body 32, the upstream swing check valve plate 35 is fixed on the upstream swing check valve body 32 through an upstream swing check valve plate shaft 34, and the fixing mechanism is disposed below the upstream swing check valve plate 35.
In this embodiment, the fixing mechanism includes a latch 37, the latch 37 is fixed to the upstream swing check valve body 32 by a latch shaft 36, and a spring 38 and a restoring mechanism are further disposed on the latch 37.
In this embodiment, the restoring mechanism includes a steel wire 39, the steel wire 39 is fixed on the latch 37, a steel wire pull ring 41 is disposed on the steel wire 39, the steel wire pull ring 41 extends to the outside of the upstream swing check valve body 32, and a heavy ball 43 is hung on the steel wire pull ring 41.
In the present embodiment, the upper end of the upstream swing check valve body 32 is provided with an upstream swing check valve cover 29, and an upstream swing check valve seal ring 30 and an upstream swing check valve seal gasket 31 are arranged between the upstream swing check valve body 32 and the upstream swing check valve cover 29; the lower end of the upstream swing check valve body 32 is provided with an upstream swing check valve seat 33, and the upstream swing check valve seat 33 is provided with an upstream swing check valve flange 44 for fixing the upstream swing check valve 6.
Further, once the temperature sensitive automatic air shutoff valve 5 is closed, the natural gas in the distribution gas pipeline 2 stops flowing, the impact force of the flowing gas on the upstream swing check valve plate 35 disappears, the upstream swing check valve plate 35 rotates and falls under the action of gravity and flattens the latch tongue 37, as shown in fig. 7, the upstream swing check valve plate 35 continuously falls to cover the upstream swing check valve seat 3, so as to automatically cut off the distribution gas pipeline 2, and meanwhile, the center of the bottom of the upstream swing check valve plate 35 is locked by the automatically bounced latch tongue 37, as shown in fig. 6. If a break occurs in the gas distribution pipeline 2 between the temperature-sensitive automatic gas shutoff valve 5 and the upstream swing check valve 6, the natural gas in the pipeline leaks out to reduce the pressure, which is lower than the pressure in the gas distribution pipeline 2 above the upstream swing check valve 6, so that a positive pressure difference acts on the front surface of the upstream swing check valve plate 35 to enable the upstream swing check valve plate 35 to have a reopening acting force, but at the moment, the bolt 37 locks the upstream swing check valve plate 35 to ensure that the upstream swing check valve plate 35 is not reopened under the positive pressure difference. Since the upstream swing check valve 6 is installed at a distance from the branch transfer station 3, this position is outside the fire zone, thereby disconnecting the upstream branch transfer gas pipe 2 from the fire. When normal air supply is resumed after a fire, the bolt 37 fixes the upstream swing check valve plate 35, so that the upstream swing check valve 6 cannot be automatically opened by the air transmission pressure in the upstream sub air transmission pipeline 2, therefore, before normal air transmission is resumed, a heavy ball 43 needs to be manually hung on a steel wire pull ring 41 through a hook 42, as shown in fig. 8, the gravity of the heavy ball 43 overcomes the elastic force of a spring 38 below the bolt 37 to move the bolt 37 downwards, the locking is cancelled, and the upstream swing check valve plate 35 is automatically opened by the air transmission pressure in the upstream sub air transmission pipeline 2 to realize air transmission. After normal gas delivery, the weight ball 43 is manually removed to make the spring tongue 37 be bounced by the spring 38, and the upstream swing check valve 6 is put into operation again.
It should be noted that, for simplicity of description, the foregoing embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are presently preferred and that no particular act is required in the present application.
Furthermore, the terms "connected" and "disposed" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "connected" or "provided" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "connected," "disposed," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
In the above embodiments, the basic principle and the main features of the present invention and the advantages of the present invention have been described. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention, which should be construed as within the scope of the appended claims.
Claims (10)
1. The utility model provides a natural gas divides automatic device of cutting off gas of defeated station conflagration, includes main gas transmission pipeline (1), be provided with branch gas transmission pipeline (2) on main gas transmission pipeline (1), its characterized in that, be provided with upper reaches swing check valve (6) and low reaches swing check valve (7) on branch gas transmission pipeline (2), still be provided with between upper reaches swing check valve (6) and low reaches swing check valve (7) and divide defeated station (3), divide defeated station (3) to include that upstream unloading assists pipe (8) and downstream unloading and assist pipe (9), be provided with temperature sensitive automatic air-break valve (5) between upper reaches unloading assists pipe (8) and the downstream unloading pipe (9).
2. The automatic fire gas shutoff device for the natural gas branch station as claimed in claim 1, wherein the branch gas transmission pipeline (2) is further provided with a main gas transmission pipeline (1) and an air inlet valve (4).
3. The automatic fire gas shutoff device for the natural gas distribution station as claimed in claim 1, wherein the temperature-sensitive automatic gas shutoff valve (5) comprises a temperature-sensitive automatic gas shutoff valve body (18), a temperature-sensitive automatic gas shutoff valve core (17) is arranged in a cavity of the temperature-sensitive automatic gas shutoff valve body (18), the temperature-sensitive automatic gas shutoff valve core (17) is fixed on the bearing rod (11) through a central rod (16), and the bearing rod (11) is fixed on the temperature-sensitive automatic gas shutoff valve body (18) through a bearing rod seat (15).
4. The automatic fire gas shutoff device for the natural gas distribution station according to claim 3, wherein a temperature-sensitive automatic gas shutoff valve cover (10) is provided at an upper end of the temperature-sensitive automatic gas shutoff valve body (18), and a temperature-sensitive automatic gas shutoff valve sealing ring (12) and a temperature-sensitive automatic gas shutoff valve sealing gasket (13) are further provided between the temperature-sensitive automatic gas shutoff valve body (18) and the temperature-sensitive automatic gas shutoff valve cover (10); the lower end of the temperature-sensitive automatic air-break valve body (18) is provided with a temperature-sensitive automatic air-break valve seat (19), and the temperature-sensitive automatic air-break valve seat (19) is provided with a temperature-sensitive automatic air-break valve flange (20) used for fixing the temperature-sensitive automatic air-break valve (5).
5. The automatic fire gas shutoff device for the natural gas distribution station as recited in claim 1, wherein the downstream swing check valve (7) comprises a downstream swing check valve body (28), a downstream swing check valve plate (25) is disposed in a cavity of the downstream swing check valve body (28), and the downstream swing check valve plate (25) is fixed to the downstream swing check valve body (28) by a downstream swing check valve plate shaft hinge (26).
6. The automatic fire gas shutoff device for the natural gas distribution station as claimed in claim 5, wherein a downstream swing check valve cover (21) is provided at an upper end of the downstream swing check valve body (28), and a downstream swing check valve seal ring (22) and a downstream swing check valve packing (23) are provided between the downstream swing check valve body (28) and the downstream swing check valve cover (21); the lower extreme of low reaches swing check valve body (28) is provided with low reaches swing check valve disk seat (27), be provided with low reaches swing check valve flange (24) that are used for fixed low reaches swing check valve (7) on low reaches swing check valve disk seat (27).
7. The automatic fire gas shutoff device for the natural gas distribution station according to claim 1, wherein the upstream swing check valve (6) comprises an upstream swing check valve body (32), an upstream swing check valve plate (35) and a fixing mechanism for locking the upstream swing check valve plate (35) are disposed in a cavity of the upstream swing check valve body (32), the upstream swing check valve plate (35) is fixed on the upstream swing check valve body (32) through an upstream swing check valve plate hinge (34), and the fixing mechanism is disposed below the upstream swing check valve plate (35).
8. The automatic fire cut-off device for the natural gas distribution station as claimed in claim 7, wherein the fixing mechanism comprises a latch (37), the latch (37) is fixed on the upstream swing check valve body (32) through a latch shaft (36), and a spring (38) and a restoring mechanism are further arranged on the latch (37).
9. The automatic fire gas shutoff device for the natural gas distribution station as claimed in claim 8, wherein the restoring mechanism comprises a steel wire (39), the steel wire (39) is fixed on the latch tongue (37), a steel wire pull ring (41) is arranged on the steel wire (39), the steel wire pull ring (41) extends to the outside of the upstream swing check valve body (32), and a heavy ball (43) is hung on the steel wire pull ring (41).
10. The automatic fire gas shutoff device for the natural gas distribution station as claimed in claim 7, wherein an upstream swing check valve cover (29) is provided at an upper end of the upstream swing check valve body (32), and an upstream swing check valve seal ring (30) and an upstream swing check valve seal gasket (31) are provided between the upstream swing check valve body (32) and the upstream swing check valve cover (29); the lower end of the upstream swing check valve body (32) is provided with an upstream swing check valve seat (33), and an upstream swing check valve flange (44) used for fixing the upstream swing check valve (6) is arranged on the upstream swing check valve seat (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221430542.9U CN217683403U (en) | 2022-06-09 | 2022-06-09 | Automatic gas cutting-off device for fire disaster of natural gas distribution and transmission station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221430542.9U CN217683403U (en) | 2022-06-09 | 2022-06-09 | Automatic gas cutting-off device for fire disaster of natural gas distribution and transmission station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217683403U true CN217683403U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221430542.9U Active CN217683403U (en) | 2022-06-09 | 2022-06-09 | Automatic gas cutting-off device for fire disaster of natural gas distribution and transmission station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217683403U (en) |
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2022
- 2022-06-09 CN CN202221430542.9U patent/CN217683403U/en active Active
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