Natural gas safety cut-off valve

Abstract

The utility model discloses a natural gas safety cut-off valve which comprises a cut-off valve body, flanges are fixed at two ends of a valve body of the cut-off valve body, and the natural gas safety cut-off valve further comprises an inner cover mechanism and an outer cover mechanism which are oppositely combined to cover the flanges. And the inner cover mechanism comprises a cover pipe inner pair shell, a rubber pair arc pad A, an insertion hole A, a cover disc pair shell A and a semicircular step groove. The inner cover mechanism and the outer cover mechanism are arranged at the stop valve body, so that a cover cavity structure composed of the inner cover mechanism and the outer cover mechanism exists at the joint of the stop valve body and the natural gas conveying pipeline; when natural gas leakage occurs in the connection of the stop valve body and the natural gas conveying pipeline, the natural gas in the cover cavity structure can be quickly detected by the natural gas alarm, and the natural gas leakage at the natural gas safety stop valve can be timely detected, so that the safe use of the natural gas safety stop valve is ensured.

Description

Technical Field

[0001] This utility model relates to the field of natural gas safety shut-off valve technology, and in particular to a natural gas safety shut-off valve. Background Technology

[0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It is primarily found in oil and gas fields, with a small amount also found in coal seams. During transportation, the gas pressure changes, necessitating the regulation and protection of safety shut-off valves. Natural gas safety shut-off valves are devices used in natural gas transmission and distribution systems to monitor natural gas pressure and, when necessary, shut off the gas supply to ensure system safety.

[0003] Existing natural gas safety shut-off valves may experience gas leakage hazards during prolonged use if the sealing rings at both ends age or are damaged. Although natural gas safety shut-off valves are equipped with combustible gas leak detectors for leak detection, the spaces where natural gas safety shut-off valves are located are usually large, making it difficult to detect leaks in a timely manner. This results in safety hazards in the room where the natural gas safety shut-off valve is located being difficult to detect. Therefore, we propose a new type of natural gas safety shut-off valve. Utility Model Content

[0004] The main objective of this invention is to provide a natural gas safety shut-off valve. By incorporating an inner cover mechanism and an outer cover mechanism at the valve body, a cavity structure consisting of the inner and outer cover mechanisms is created at the connection between the valve body and the natural gas pipeline. When a natural gas leak occurs at the connection between the valve body and the pipeline, the natural gas within the cavity structure can be quickly detected by a natural gas alarm. This facilitates timely detection of gas leaks at the natural gas safety shut-off valve, ensuring its safe operation and effectively addressing the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A natural gas safety shut-off valve includes a shut-off valve body with flanges fixed at both ends. It also includes an inner cover mechanism and an outer cover mechanism, which are arranged opposite each other to cover the flanges. The inner cover mechanism includes an inner shell of a cover pipe, a rubber arc gasket A, a socket A, a cover plate A, and a semi-circular stepped groove. The inner shell of the cover pipe is symmetrically installed outside the shut-off valve body behind the flange. A rubber arc gasket A for abutting the shut-off valve body is bonded to the inner shell surface of the inner shell of the cover pipe. A cover plate A for covering the flange is symmetrically welded to one side of the shell of the inner shell of the cover pipe. The shells of the cover plate A are symmetrically locked on both sides by bolts and nuts. A semi-circular stepped groove is recessed on the inner shell surface of the cover plate A. The outer casing has a socket A for welding an external connecting pipe. The outer casing mechanism includes a rubber cover gasket, a cover plate cover B, a cover pipe outer cover, a rubber arc gasket B, and a socket B. The rubber cover gasket is symmetrically embedded between the semi-circular stepped grooves of the flange and the cover plate cover A, and the gasket body is bonded and fixed inside the cover plate cover B. The cover plate cover B is locked on both sides by bolts and nuts. The cover pipe outer cover is symmetrically welded to the rear cover of the cover plate cover B away from the rubber cover gasket. The cover pipe outer cover is locked on both sides by bolts and nuts. The rubber arc gasket B is bonded inside the cover pipe outer cover. A socket B for welding an external connecting pipe is opened on the surface of one set of the cover pipe outer cover. A natural gas alarm is inserted into the vertical pipe opening of the external connecting pipe.

[0007] Furthermore, two sets of shells inside the cover tube are symmetrically fixed with rear mounting plates A on both sides, and bolts and nuts pass through the holes on the surface of the rear mounting plates A inside the cover tube to lock them in place.

[0008] By adopting the above technical solution, and by setting a rear mounting plate A inside the cover tube, the inner shell of the cover tube can be symmetrically locked with bolts and nuts using the rear mounting plate A. This design helps to prevent the inner shell of the cover tube from loosening or falling off during use.

[0009] Furthermore, the cover plate is symmetrically fixed with side mounting plates A on both sides of the two sets of shells A, and bolts and nuts pass through the holes on the surface of the side mounting plates A of the cover plate to lock them in place.

[0010] By adopting the above technical solution, by setting a side mounting plate A at the cover plate opposite shell A, the cover plate opposite shell A can be symmetrically locked with bolts and nuts using the side mounting plate A. This design helps to prevent the cover plate opposite shell A from loosening or falling off during use.

[0011] Furthermore, the cover plate is symmetrically fixed with side mounting plates B on both sides of the two sets of shells B, and bolts and nuts pass through the holes on the surface of the side mounting plates B of the cover plate to lock them.

[0012] By adopting the above technical solution, and by setting a side mounting plate B at the cover plate to the shell B, the cover plate to the shell B can be symmetrically locked with bolts and nuts using the side mounting plate B. This design helps to prevent the cover plate to the shell B from loosening or falling off during use.

[0013] Furthermore, the two sets of shells on both sides of the outer shell of the cover tube are symmetrically fixed with rear mounting plates B, and bolts and nuts pass through the holes on the surface of the rear mounting plates B on the outer shell of the cover tube and lock them in place.

[0014] By adopting the above technical solution, and by setting a rear mounting plate B at the outer shell of the cover tube, the outer shell of the cover tube can be symmetrically locked with bolts and nuts using the rear mounting plate B. This design helps to prevent the outer shell of the cover tube from loosening or falling off during use.

[0015] Furthermore, the inner shell surfaces of the inner and outer shells of the cover tube are recessed with semi-circular grooves, and rubber arc pads A and B are respectively bonded in the semi-circular grooves of the inner and outer shells of the cover tube.

[0016] By adopting the above technical solution, the inner shell and outer shell of the cover tube can be respectively bonded and installed with rubber arc pad A and rubber arc pad B through semi-circular grooves.

[0017] Furthermore, the external connecting pipe has an L-shaped body, and a ring is bonded to the vertical pipe body of the external connecting pipe.

[0018] By adopting the above technical solution, the L-shaped pipe design allows the external connecting pipe to be connected to the natural gas alarm more flexibly, while the ring design provides additional support and fixing points, which helps to ensure that the external connecting pipe will not loosen or fall off due to vibration or external force during use.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model provides an inner cover mechanism and an outer cover mechanism at the shut-off valve body. The inner cover mechanism and the outer cover mechanism create a cavity structure at the connection between the shut-off valve body and the natural gas pipeline. When a natural gas leak occurs at the connection between the shut-off valve body and the natural gas pipeline, the natural gas in the cavity structure can be quickly detected by the natural gas alarm. This helps to ensure that gas leaks at the natural gas safety shut-off valve can be detected in a timely manner, thus ensuring the safe use of the natural gas safety shut-off valve.

[0021] Furthermore, the inner and outer cover mechanisms are combined and positioned opposite each other outside the flange, forming a solid protective barrier that can effectively reduce natural gas leakage when it occurs at the shut-off valve body. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of a natural gas safety shut-off valve according to this utility model.

[0023] Figure 2 This is a schematic diagram showing the valve body, inner cover mechanism, and outer cover mechanism of a natural gas safety shut-off valve according to this utility model.

[0024] Figure 3 This is an exploded view of the inner cover mechanism of a natural gas safety shut-off valve according to this utility model.

[0025] Figure 4 This is an exploded view of the outer casing mechanism of a natural gas safety shut-off valve according to this utility model.

[0026] In the diagram: 1. Shut-off valve body; 2. Flange; 3. Inner cover mechanism; 4. Outer cover mechanism; 5. Inner shell of the cover tube; 6. Rubber arc gasket A; 7. Insertion hole A; 8. External connecting pipe; 9. Cover plate of the cover tube A; 10. Semi-circular stepped groove; 11. Side mounting plate A; 12. Rear mounting plate A; 13. Rubber gasket of the cover tube; 14. Cover plate of the cover tube B; 15. Side mounting plate B; 16. Outer shell of the cover tube; 17. Rear mounting plate B; 18. Rubber arc gasket B; 19. Semi-circular groove; 20. Insertion hole B; 21. Ring; 22. Natural gas alarm. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figure 1-4As shown, a natural gas safety shut-off valve includes a shut-off valve body 1, with flanges 2 fixed at both ends of the valve body 1. It also includes an inner cover mechanism 3 and an outer cover mechanism 4, which are arranged opposite each other to cover the flanges 2. The inner cover mechanism 3 includes a cover pipe inner shell 5, a rubber arc gasket A6, an insertion hole A7, a cover plate shell A9, and a semi-circular stepped groove 10. The inner shells 5 are symmetrically installed outside the shut-off valve body 1 behind the flanges 2. A rubber arc gasket A6 for contacting the shut-off valve body 1 is bonded to the inner shell surface of the inner shell 5. A cover plate shell A9 for covering the flanges 2 is symmetrically welded to one side of the shell of the inner shell 5. The shells of the cover plate shell A9 are symmetrically locked on both sides by bolts and nuts. A semi-circular stepped groove 10 is recessed on the inner shell surface of the cover plate shell A9. A set of shells of the inner shell 5 is provided with... The outer casing mechanism 4 includes a rubber cover gasket 13, a cover plate shell B14, a cover pipe outer shell 16, a rubber arc gasket B18, and a socket B20. The rubber cover gasket 13 is symmetrically embedded between the flange 2 and the semi-circular stepped groove 10 of the cover plate shell A9, and the gasket body of the rubber cover gasket 13 is bonded and fixed inside the cover plate shell B14. The shell of the cover plate shell B14 is locked on both sides by bolts and nuts, and the cover pipe outer shell 16 is symmetrically welded to the rear shell of the cover plate shell B14 away from the rubber cover gasket 13. The shell of the cover pipe outer shell 16 is locked on both sides by bolts and nuts. The rubber arc gasket B18 is bonded inside the shell of the cover pipe outer shell 16, and a set of shell surfaces of the cover pipe outer shell 16 are provided with a socket B20 for welding the outer casing 8. A natural gas alarm 22 is inserted into the vertical pipe opening of the outer casing 8.

[0029] Among them, the two sets of shells 5 are symmetrically fixed with rear mounting plates A12 inside the cover tube, and bolts and nuts pass through the holes on the surface of the rear mounting plates A12 inside the cover tube and lock them together.

[0030] By adopting the above technical solution, and by setting a rear mounting plate A12 at the inner shell 5 of the cover tube, the inner shell 5 of the cover tube can be symmetrically locked with bolts and nuts by means of the rear mounting plate A12. This design helps to prevent the inner shell 5 of the cover tube from loosening or falling off during use.

[0031] Among them, the two sets of shells of the cover plate A9 are symmetrically fixed with side mounting plates A11 on both sides, and bolts and nuts pass through the holes of the side mounting plates A11 of the cover plate A9 to lock them.

[0032] By adopting the above technical solution, by setting a side mounting plate A11 at the cover plate to the shell A9, the cover plate to the shell A9 can be symmetrically locked with bolts and nuts using the side mounting plate A11. This design helps to prevent the cover plate to the shell A9 from loosening or falling off during use.

[0033] Among them, the two sets of shells of the cover plate B14 are symmetrically fixed with side mounting plates B15 on both sides, and bolts and nuts pass through the holes of the side mounting plates B15 of the cover plate B14 to lock them.

[0034] By adopting the above technical solution, by setting a side mounting plate B15 at the cover plate to the shell B14, the cover plate to the shell B14 can be symmetrically locked with bolts and nuts by means of the side mounting plate B15. This design helps to prevent the cover plate to the shell B14 from loosening or falling off during use.

[0035] Among them, the two sets of shells of the outer shell 16 are symmetrically fixed with rear mounting plates B17 on both sides, and bolts and nuts pass through the holes on the surface of the rear mounting plates B17 of the outer shell 16 and are locked.

[0036] By adopting the above technical solution, and by setting a rear mounting plate B17 at the outer shell 16 of the cover tube, the outer shell 16 of the cover tube can be symmetrically locked with bolts and nuts using the rear mounting plate B17. This design helps to prevent the outer shell 16 of the cover tube from loosening or falling off during use.

[0037] The inner shell surfaces of the inner shell 5 and the outer shell 16 of the cover tube are recessed with semi-circular grooves 19, and rubber arc pads A6 and B18 are respectively bonded in the semi-circular grooves 19 of the inner shell 5 and the outer shell 16 of the cover tube.

[0038] By adopting the above technical solution, the inner shell 5 and the outer shell 16 of the cover tube can be respectively bonded and installed with rubber arc pads A6 and B18 through the semi-circular groove 19.

[0039] The external connecting pipe 8 has an L-shaped body, and a ring 21 is bonded to the vertical pipe body of the external connecting pipe 8.

[0040] By adopting the above technical solution, the L-shaped pipe design allows the external connecting pipe 8 to be connected to the natural gas alarm 22 more flexibly, while the design of the ring 21 provides additional support and fixing points, which helps to ensure that the external connecting pipe 8 will not loosen or fall off due to vibration or external force during use.

[0041] It should be noted that this utility model is a natural gas safety shut-off valve. An inner cover mechanism 3 and an outer cover mechanism 4 are provided at the shut-off valve body 1. When the flange 2 of the shut-off valve body 1 is flanged to the natural gas transmission pipeline, the inner cover 5 of the inner cover mechanism 3 can symmetrically cover the shut-off valve body 1. Then, the rear mounting plate A12 of the inner cover 5 can be locked with bolts and nuts, so that the inner cover 5 is symmetrically covered by rubber gaskets A6. Next, the inner cover 5's cover plate A9 can cover the flange 2. Then, the side mounting plate A11 of the cover plate A9 can be symmetrically locked with bolts and nuts. Finally, the outer cover 16 can symmetrically cover the natural gas transmission pipeline, so that the cover plate B14 can cover the flange of the natural gas transmission pipeline. Simultaneously, the rubber gasket 13... The flange 2 and the cover plate A9 can be inserted between the semi-circular stepped groove 10. Then, the rear mounting plate B17 of the outer casing 16 is symmetrically locked with bolts and nuts, so that the rubber arc gasket B18 of the outer casing 16 can abut against the outside of the natural gas transmission pipeline. At the same time, the side mounting plate B15 of the cover plate B14 can be symmetrically locked with bolts and nuts, so that there is a cavity structure composed of inner cover mechanism 3 and outer cover mechanism 4 at the connection between the shut-off valve body 1 and the natural gas transmission pipeline. Then, the natural gas alarm 22 can be inserted into the external connecting pipe 8 to detect the gas in the cavity structure. When a natural gas leak occurs at the connection between the shut-off valve body 1 and the natural gas transmission pipeline, the natural gas in the cavity structure can be quickly detected by the natural gas alarm 22, which helps to detect gas leaks at the natural gas safety shut-off valve in a timely manner.

[0042] It should be noted that this utility model is a natural gas safety shut-off valve. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A natural gas safety shut-off valve comprising a shut-off valve body (1), flanges (2) are fixed at both ends of the valve body of the shut-off valve body (1), characterized in that: Further comprising inner cover mechanism (3) and outer cover mechanism (4), the inner cover mechanism (3) and outer cover mechanism (4) are combined cover to the flange plate (2) outside, the inner cover mechanism (3) comprises cover pipe inner shell (5), rubber arc pad A (6), jack A (7), cover plate shell A (9) and semicircle step groove (10), the cover pipe inner shell (5) is symmetrically installed outside the cut-off valve body (1) behind the flange plate (2), and the inner shell surface of the cover pipe inner shell (5) is bonded with the rubber arc pad A (6) for resisting the cut-off valve body (1), and the shell body of the cover pipe inner shell (5) is symmetrically welded with the cover plate shell A (9) for covering the flange plate (2), and the shell body of the cover plate shell A (9) is symmetrically locked with the cover plate shell A (9) through bolt and nut, the inner shell surface of the cover plate shell A (9) is recessed with semicircle step groove (10), a group of shell bodies of the cover pipe inner shell (5) are provided with jack A (7) for welding outer connecting pipe (8), the outer cover mechanism (4) comprises rubber cover pad (13), cover plate shell B (14), cover pipe outer shell (16), rubber arc pad B (18) and jack B (20), the rubber cover pad (13) is symmetrically embedded between the flange plate (2) and the semicircle step groove (10) of the cover plate shell A (9), and the pad body of the rubber cover pad (13) is bonded and fixed in the cover plate shell B (14), the shell body of the cover plate shell B (14) is locked through bolt and nut, and the cover pipe outer shell (16) is symmetrically welded with the cover plate shell B (14) away from the rubber cover pad (13) at the rear shell body, the shell body of the cover pipe outer shell (16) is locked through bolt and nut, the shell body of the cover pipe outer shell (16) is bonded with rubber arc pad B (18), and a group of shell body surfaces of the cover pipe outer shell (16) are provided with jack B (20) for welding outer connecting pipe (8), and the vertical pipe mouth of the outer connecting pipe (8) is inserted with natural gas alarm (22).

2. A natural gas safety shut-off valve according to claim 1, wherein: Two groups of shell bodies of the cover pipe inner shell (5) are symmetrically fixed with rear mounting plate A (12), and the surface panel hole of the rear mounting plate A (12) of the cover pipe inner shell (5) is locked through bolt and nut.

3. A natural gas safety shut-off valve according to claim 1, wherein: Two groups of shell bodies of the cover plate shell A (9) are symmetrically fixed with side mounting plate A (11), and the surface panel hole of the side mounting plate A (11) of the cover plate shell A (9) is locked through bolt and nut.

4. A natural gas safety shut-off valve according to claim 1, wherein: Two groups of shell bodies of the cover plate shell B (14) are symmetrically fixed with side mounting plate B (15), and the surface panel hole of the side mounting plate B (15) of the cover plate shell B (14) is locked through bolt and nut.

5. A natural gas safety shut-off valve as defined in claim 1, wherein: Two groups of shell bodies of the cover pipe outer shell (16) are symmetrically fixed with rear mounting plate B (17), and the surface panel hole of the rear mounting plate B (17) of the cover pipe outer shell (16) is locked through bolt and nut.

6. A natural gas safety shut-off valve according to claim 1, wherein: The inner shell surface of the cover pipe inner shell (5) and the cover pipe outer shell (16) is recessed with semicircle groove (19), and the semicircle groove (19) of the cover pipe inner shell (5) and the cover pipe outer shell (16) is respectively bonded with rubber arc pad A (6) and rubber arc pad B (18).

7. A natural gas safety shut-off valve as defined in claim 1, wherein: The pipe body of the outer connecting pipe (8) is an L-shaped pipe body, and a ring (21) is bonded in the vertical pipe body of the outer connecting pipe (8).

Images