CN217583196U - Self-closing valve for large-flow gas pipeline - Google Patents

Abstract

The utility model provides a large-traffic gas pipeline self-closing valve, including valve body and valve gap, be equipped with the chamber of admitting air that feeds through in proper order in valve body and the valve gap, the valve pocket, go out the air cavity, the intracavity is equipped with pressure differential transducer admits air, be equipped with the case screw hole that will admit air chamber and valve pocket intercommunication in the valve body, the case screw threaded hole is provided with the self-closing case, the self-closing case is including the valve casing that has the inner room, the inlet port has been seted up on the valve casing is close to the terminal surface that admits air the chamber, the venthole has been seted up on the valve casing is close to the terminal surface of valve pocket, the indoor slip is provided with the valve plate, a plurality of air vents have been seted up on the valve plate, be provided with rather than grafting complex end cap on the terminal surface of valve plate orientation inlet port, the terminal surface that deviates from the valve plate end cap is provided with the self-closing spring between the inner wall that the valve pocket is close to the valve pocket with the inner room. The finished product self-closing valve core is arranged in the valve core threaded hole, so that the number of components is reduced, the installation is convenient, and the production efficiency of the high-flow gas pipeline self-closing valve is improved.

Description

Self-closing valve for large-flow gas pipeline

Technical Field

The utility model belongs to the technical field of the technique of valve and specifically relates to a large-traffic gas pipeline self-closing valve is related to.

Background

The fuel gas is used as clean energy with low consumption, high benefit, low pollution and high benefit, and is widely applied to daily production and life of people. In the use of gas, there is following potential safety hazard: when gas supply of a gas pipeline is suddenly interrupted, people often forget to close a valve due to negligence, and gas leakage is caused after the gas supply is restored, so that explosion is easy to occur and the gas pipeline is prone to linkage explosion; the high-pressure and the medium-pressure are adjusted to the low pressure by a pressure regulator when the gas pipeline enters the house, and if the pressure regulator fails, the safety accident can be caused when the high-pressure and the medium-pressure gas directly enter the house; the gas bottle and the stove are usually connected by a rubber tube, and the falling or the breakage of the rubber tube can also cause safety accidents. To various potential safety hazards which are easy to appear in the practical process of the gas, a safety valve which can automatically cut off a gas pipeline is generally needed, namely, the self-closing valve is installed on a low-pressure gas system pipeline, and when the gas pipeline has the conditions of under-pressure, overpressure and the like, the gas pipeline can be automatically cut off to ensure that the gas can be safely used without electricity or other external power.

The prior Chinese patent with the publication number of CN2522696Y discloses a household pipeline gas automatic closing valve, which comprises a gas stop self-closing valve, wherein a sensor is connected in a gas inlet nozzle of the gas stop self-closing valve, the sensor is a gas pressure difference sensor, the sensor comprises a base, the base is fixed at one end of a gas outlet of the gas inlet nozzle, a linkage shaft is arranged on the base, a spring and a floating plug are sleeved on the linkage shaft, the spring is sleeved at one end of the linkage shaft close to the gas outlet of the gas inlet nozzle, the floating plug is sleeved at one end of the linkage shaft far away from the gas outlet of the gas inlet nozzle, a cover is arranged on the base in a covering manner, a positioning sleeve is arranged on the cover in a pressing manner, and a protective net is arranged in the positioning sleeve. When a combustion gas system has micro leakage, the gas stop self-closing valve is opened, because of unbalanced gas pressure difference, the floating plug 3 and the linkage shaft 4 float to the lower end of gas pressure to block a gas flow channel, so that the gas stop self-closing valve is stopped, and the gas stop self-closing valve is enabled to realize the gas stop self-closing function.

The above prior art solutions have the following drawbacks: the existing gas stop self-closing valve has more components and more complex structure, so the production efficiency is easy to reduce.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to the above-mentioned not enough and provide a large-traffic gas pipeline self-closing valve that exists among the prior art, it has solved the problem that machining efficiency is low that exists among the prior art.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the valve body and the valve cover are internally provided with an air inlet cavity, a valve cavity and an air outlet cavity which are sequentially communicated, a pressure difference sensor is arranged in the air inlet cavity, a valve core threaded hole which is used for communicating the air inlet cavity with the valve cavity is formed in the valve body, a self-closing valve core is arranged in the valve core threaded hole, the self-closing valve core comprises a valve shell with an inner chamber, an air inlet hole communicated with the inner chamber is formed in the end face, close to the air inlet cavity, of the valve shell, an air outlet hole communicated with the inner chamber is formed in the end face, close to the valve cavity, of the valve shell, a valve plate is arranged in the inner chamber in a sliding mode, a plurality of air vents are formed in the valve plate, a plug matched with the valve plate in a plug-in mode is arranged on the end face, facing the air inlet hole, of the valve plate, and a self-closing spring is arranged between the end face, far away from the plug, of the valve plate and the inner wall, close to the valve cavity, of the inner chamber.

The utility model discloses further set up to: the valve shell comprises a shell body which is in threaded connection with the threaded hole of the valve core and is provided with an opening towards the inner chamber, and a shell cover for sealing the inner chamber, the air inlet is formed in the end face, close to the air inlet cavity, of the shell cover, and the air outlet is formed in the end face, close to the valve cavity, of the shell body.

The utility model discloses further set up to: the self-closing spring is sleeved on the sliding column, and the cross sections of the upper sliding hole, the lower sliding hole and the sliding column are polygonal.

The utility model discloses further set up to: the valve comprises a valve body, a valve cover and a sliding column, wherein the valve cover is provided with a guide hole communicated with the valve cavity, a pull rod with the top penetrating through the guide hole in sliding fit with the valve cavity to extend out of the valve cavity is movably arranged in the valve cavity, a diaphragm is arranged on the pull rod, the diaphragm is positioned between the valve body and the valve cover at the edge and divides the valve cavity into an upper cavity and a lower cavity, a suction plate is arranged on the bottom surface of the pull rod, and a permanent magnet mutually adsorbed with the suction plate is arranged on the top surface of the sliding column.

The utility model discloses further set up to: the top surface of the valve body is provided with an annular positioning groove, and the end surface of the diaphragm facing the positioning groove is provided with a positioning convex ring which is in embedded fit with the positioning groove.

The utility model discloses further set up to: the diaphragm is characterized in that a mounting hole for the pull rod to penetrate through is formed in the center of the diaphragm, an iron gasket tightly abutting against the top surface of the diaphragm is sleeved on the pull rod, and a nut for tightly pressing the iron gasket and the diaphragm on the suction plate is connected to the pull rod through threads.

The utility model discloses further set up to: the top surface of the sliding column is provided with an upper threaded hole, the center of the permanent magnet is provided with a counter bore aligned with the upper threaded hole, and an upper fixing screw in threaded connection with the upper threaded hole is arranged in the counter bore.

The utility model discloses further set up to: the bottom surface of the sliding column is provided with a lower threaded hole, the bottom surface of the sliding column is provided with a limiting plate, the center of the limiting plate is provided with a through hole aligned with the lower threaded hole, and the through hole is provided with a lower fixing screw in a threaded connection with the lower threaded hole in a penetrating manner.

The utility model discloses further set up to: the inner wall of the valve cover is provided with a sealing groove communicated with the guide hole, and a sealing ring which is penetrated by the pull rod and is in sealing fit with the pull rod is embedded in the sealing groove.

The utility model discloses further set up to: the top of the pull rod is provided with a pull cover, and the bottom surface of the pull cover is provided with a rod mounting threaded hole in threaded connection with the top of the pull rod.

To sum up, the utility model discloses a beneficial technological effect does: according to the high-flow gas pipeline self-closing valve, the finished product self-closing valve core is arranged in the valve core threaded hole, so that the number of components is reduced, the installation is convenient, and the production efficiency of the high-flow gas pipeline self-closing valve is favorably improved.

Drawings

FIG. 1 is a schematic half-section view of a medium-large flow gas pipeline self-closing valve of the present invention;

FIG. 2 is a sectional view of the self-closing valve cartridge of the present invention;

fig. 3 is an exploded view of the self-closing cartridge of the present invention.

In the above drawings: 1. a valve body; 2. a valve cover; 3. an air inlet cavity; 4. a valve core threaded hole; 5. a valve cavity; 51. an upper cavity; 52. a lower cavity; 6. an air outlet cavity; 7. a differential pressure sensor; 8. a ball valve; 9. a guide hole; 10. a sealing groove; 11. a seal ring; 12. a pull rod; 13. pulling the cover; 14. a rod mounting threaded hole; 15. positioning a groove; 16. sucking a plate; 17. a membrane; 18. mounting holes; 19. positioning the convex ring; 20. an iron shim; 21. a nut; 22. a self-closing valve element; 23. a valve housing; 231. a housing; 232. a shell cover; 24. an inner chamber; 25. a lower slide hole; 26. an air intake; 27. an upper slide hole; 28. an air outlet; 29. a valve plate; 30. a vent hole; 31. a plug; 32. a traveler; 33. a self-closing spring; 34. an upper threaded hole; 35. a permanent magnet; 36. countersinking; 37. an upper fixing screw; 38. a lower threaded hole; 39. a limiting plate; 40. perforating; 41. and a lower fixing screw.

Detailed Description

In order to make the technical means, creation features, achievement purposes and effects of the present invention clearer and easier to understand, the present invention is further explained below with reference to the accompanying drawings and the detailed description.

As shown in figure 1, the utility model provides a large-traffic gas pipeline self-closing valve, including valve body 1, valve gap 2, have the external screw thread on the lateral wall of valve body 1, valve gap 2 threaded connection is on valve body 1. Be equipped with the chamber 3 that admits air, case screw hole 4, valve pocket 5, the air outlet chamber 6 that communicate in proper order in valve body 1 and the valve gap 2, 5 parts of valve pocket are located valve gap 2, and the part is located valve body 1, and the chamber 3 that admits air, case screw hole 4, air outlet chamber 6 all are located valve body 1, and 3 female connections in the chamber that admits air have pressure differential sensor 7, are provided with the ball valve 8 that is used for controlling the break-make of air outlet chamber 6 on the valve body 1.

As shown in figure 1, the valve cover 2 is provided with a guide hole 9 communicated with the valve cavity 5, and the guide hole 9 is a circular hole. The inner wall of the valve cover 2 is provided with a sealing groove 10, the sealing groove 10 is located at the center of the valve cover 2, the sealing groove 10 is a circular groove, the sealing groove 10 is communicated with the guide hole 9, a sealing ring 11 is embedded in the sealing groove 10, and the sealing ring 11 is annular. A pull rod 12 is movably arranged in the valve cavity 5, the pull rod 12 can move up and down, the top of the pull rod 12 sequentially penetrates through a sealing ring 11 and a guide hole 9, the pull rod 12 is in sealing fit with the sealing ring 11, and the pull rod 12 is in sliding fit with the guide hole 9.

As shown in fig. 1, a pull cap 13 is disposed on the top of the pull rod 12, a rod-mounting threaded hole 14 is formed in the bottom surface of the pull cap 13, a threaded section is formed on the outer side wall of the top of the pull rod 12, the rod-mounting threaded hole 14 is in threaded connection with the top of the pull rod 12, and the pull cap 13 is used for providing a force application point for a user to pull the pull rod 12.

As shown in fig. 1, a positioning groove 15 is formed on the top surface of the valve body 1, the positioning groove 15 is circular, and the cross section of the positioning groove 15 is semicircular. The bottom surface of the pull rod 12 is integrally connected with a suction plate 16, and the suction plate 16 is disc-shaped. Be provided with diaphragm 17 on pull rod 12, diaphragm 17 is discoid, the center department of diaphragm 17 has seted up and has supplied pull rod 12 to pass and the cross section is circular shape mounting hole 18, the border of diaphragm 17 is located between valve body 1 and valve gap 2, diaphragm 17 is connected with the location bulge loop 19 with constant head tank 15 scarf joint complex towards the integral type on the terminal surface of constant head tank 15, location bulge loop 19 is the ring form, and the cross section of location bulge loop 19 is semi-circular, then valve gap 2 compresses tightly diaphragm 17 on valve body 1, diaphragm 17 separates into upper cavity 51 that is located it with valve pocket 5 and is located its lower cavity 52, lower cavity 52 and case screw hole 4 and the air outlet 6 intercommunication. The diaphragm 17 is a circular membrane-shaped elastic sensing element, and when two sides of the diaphragm 17 are subjected to different pressures, the diaphragm 17 moves towards the side with lower pressure in a strain mode, so that the center of the diaphragm is displaced in a certain relation with the pressure difference. The pull rod 12 is sleeved with an iron gasket 20, the iron gasket 20 is disc-shaped, the iron gasket 20 abuts against the top surface of the diaphragm 17, a threaded section is arranged in the middle of the pull rod 12, a nut 21 is connected to the threaded section of the pull rod 12 in a threaded mode, and the nut 21 compresses the iron gasket 20 and the diaphragm 17 on the suction plate 16.

As shown in fig. 2 and 3, the self-closing valve core 22 is disposed in the valve core threaded hole 4, the self-closing valve core 22 includes a valve housing 23, the valve housing 23 includes a housing 231 threadedly connected to the valve core threaded hole 4 and having an inner chamber 24 with an opening facing downward, and a housing cover 232 for closing the inner chamber 24, and the housing cover 232 is fixed to the housing 231 by screwing or gluing. In this embodiment, a lower sliding hole 25 and three air inlet holes 26 are formed in the end surface, close to the air inlet cavity 3, of the case cover 232, the lower sliding hole 25 and the three air inlet holes 26 are both communicated with the inner chamber 24, the lower sliding hole 25 is located at the center of the case cover 232, the cross section of the lower sliding hole 25 is a regular hexagon, the three air inlet holes 26 are circumferentially distributed on the outer side of the lower sliding hole 25 at equal intervals, and the cross section of the air inlet holes 26 is in a fan shape. In this embodiment, an upper sliding hole 27 and three air outlets 28 are formed in the end surface of the housing 231 close to the valve cavity 5, the upper sliding hole 27 and the three air outlets 28 are both communicated with the inner chamber 24, the upper sliding hole 27 is located in the center of the end surface of the housing 231, the cross section of the upper sliding hole 27 is a regular hexagon, the three air outlets 28 are equidistantly and circumferentially distributed on the outer side of the upper sliding hole 27, and the cross section of the air outlets 28 is in a fan shape.

As shown in fig. 2 and 3, a valve plate 29 is slidably disposed in the inner chamber 24, the valve plate 29 is disc-shaped, three vent holes 30 are formed in the valve plate 29 at equal intervals on the circumference, the vent holes 30 are fan-shaped holes, three plugs 31 are fixedly connected to the end face of the valve plate 29 facing the air inlet hole 26, the cross section of each plug 31 is fan-shaped, the three plugs 31 are respectively aligned with the three air inlet holes 26, and the plugs 31 are in plug-in fit with the air inlet holes 26. The center of the valve plate 29 is fixedly connected with a sliding column 32, the sliding column 32 is a regular hexagon column, two ends of the sliding column 32 respectively penetrate through the upper sliding hole 27 and the lower sliding hole 25 to extend out of the inner chamber 24, the sliding column 32 is in sliding fit with the upper sliding hole 27 and the lower sliding hole 25, the sliding column 32 can do up-and-down sliding movement stably, and the sliding column 32 is limited to rotate. The sliding column 32 is sleeved with a self-closing spring 33, one end of the self-closing spring 33 abuts against the end face, away from the plug 31, of the valve plate 29, the other end of the self-closing spring 33 abuts against the inner wall, close to the valve cavity 5, of the inner chamber 24, and the self-closing spring 33 is used for pushing the valve plate 29 to move downwards so that the plug 31 is inserted into the air inlet 26.

As shown in fig. 2 and 3, an upper threaded hole 34 is formed in the top surface of the sliding column 32, a permanent magnet 35 is arranged on the top surface of the sliding column 32, the permanent magnet is disc-shaped, a countersunk hole 36 aligned with the upper threaded hole 34 is formed in the center of the permanent magnet 35, an upper fixing screw 37 in threaded connection with the upper threaded hole 34 is arranged in the countersunk hole 36, the permanent magnet 35 is detachably mounted on the top surface of the sliding column 32 in a threaded connection manner, and the permanent magnet 35 and the suction plate 16 are mutually adsorbed.

As shown in fig. 2 and 3, a lower threaded hole 38 is formed in the bottom surface of the spool 32, a limit plate 39 is disposed on the bottom surface of the spool 32, a through hole 40 aligned with the lower threaded hole 38 is formed in the center of the limit plate 39, a lower fixing screw 41 is threaded into the through hole 40 and is connected with the lower threaded hole 38, the limit plate 39 is detachably mounted on the bottom surface of the spool 32 in a screw connection manner, and the limit plate 39 is used for limiting the upward distance of the spool 32.

When the gas pressure in the pipeline is within the preset range, the diaphragm 17 is in the non-deformation horizontal normal position, the permanent magnet 35 and the suction plate 16 are in a mutual adsorption state, the self-closing spring 33 is in a compression state, the valve plate 29 is positioned in the middle of the inner chamber 24, then the gas can sequentially pass through the gas inlet cavity 3, the gas inlet hole 26, the inner chamber 24, the vent hole 30, the inner chamber 24, the gas outlet hole 28, the lower cavity 52 and the gas outlet cavity 6, and at the moment, the high-flow gas pipeline self-closing valve is in a normal use state.

When gas is stopped or the gas pressure in the pipeline is smaller than a preset range, the center of the diaphragm 17 can move in a strain mode towards the direction close to the self-closing valve core 22, and then the pull rod 12 is driven to move downwards, because the permanent magnet 35 at the top of the sliding column 32 is connected with the sucking disc at the bottom of the pull rod 12 in an adsorption mode, the sliding column 32 and the valve plate 29 move downwards along with the sliding column until the plug 31 blocks the gas inlet 26, so that the self-closing action of the high-flow gas pipeline self-closing valve is completed, the gas is limited to pass through, the self-closing spring 33 is reset in the process, the plug 31 is accelerated to block the gas inlet 26, the high-flow gas pipeline self-closing valve can rapidly complete the self-closing action, and at the moment, the high-flow gas pipeline self-closing valve cannot be opened by manually lifting the pull rod 12 and the pull cover 13.

When gas supply is resumed and the gas pressure in the pipeline is within a preset range, a user pulls the pull rod 12 through the pull cover 13, the pull rod 12 moves upwards to drive the sliding column 32, the valve plate 29 and the plug 31 to move upwards, then the gas normally circulates in the pipeline, the diaphragm 17 returns to the non-deformation horizontal normal position, and because the gas pressure in the pipeline is within the preset range, the diaphragm 17 can keep the non-deformation horizontal normal position, then the gas can sequentially pass through the gas inlet cavity 3, the gas inlet hole 26, the inner chamber 24, the vent hole 30, the inner chamber 24, the gas outlet hole 28, the lower cavity 52 and the gas outlet cavity 6, and at the moment, the high-flow gas pipeline self-closing valve is in a normal use state.

The rubber pipe is easy to damage and fall off due to aging, the phenomenon that the rubber pipe is bitten by a mouse is also frequent, the accidental leakage often exceeds the normal gas flow of a gas appliance, namely, over-flow, when the over-flow occurs, the pressure difference sensor 7 can reduce the gas pressure in the lower cavity 52, the center of the diaphragm 17 can move in a strain mode towards the direction close to the self-closing valve core 22, and then the pull rod 12 is driven to move downwards, because the permanent magnet 35 at the top of the slide column 32 is connected with the suction disc at the bottom of the pull rod 12 in an adsorption mode, the slide column 32 and the valve plate 29 move downwards along with the suction disc until the plug 31 plugs the gas inlet hole 26, so that the self-closing action of the large-flow gas pipeline self-closing valve is completed, the gas is limited to pass through, the self-closing spring 33 is reset to accelerate the plug 31 to plug 26, the large-flow gas pipeline self-closing action can be rapidly completed, and the large-flow gas pipeline self-closing action can not be opened by manually lifting the pull rod 12 and the pull cover 13.

According to the large-flow gas pipeline self-closing valve, the finished part self-closing valve core 22 is arranged in the valve core threaded hole 4, so that the number of components is reduced, the installation is convenient, and the production efficiency of the large-flow gas pipeline self-closing valve is favorably improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (10)

1. The utility model provides a large-traffic gas pipeline self-closing valve, includes valve body (1) and valve gap (2), be equipped with air inlet chamber (3), valve pocket (5), the air outlet chamber (6) that communicate in proper order in valve body (1) and valve gap (2), be equipped with pressure differential sensor (7), its characterized in that in air inlet chamber (3): be equipped with case screw hole (4) with air intake chamber (3) and valve pocket (5) intercommunication in valve body (1), be provided with self-closing case (22) in case screw hole (4), self-closing case (22) is including valve casing (23) that have inner room (24), offer on the terminal surface that valve casing (23) are close to air intake chamber (3) inlet port (26) with inner room (24) intercommunication, offer on the terminal surface that valve casing (23) are close to valve pocket (5) outlet port (28) with inner room (24) intercommunication, it is provided with valve plate (29) to slide in inner room (24), a plurality of air vents (30) have been seted up on valve plate (29), be provided with rather than plug-in connection complex end cap (31) on the terminal surface of inlet port (26) valve plate (29), be provided with self-closing spring (33) between the terminal surface that valve plate (29) deviate from end cap (31) and inner wall that inner room (24) are close to valve pocket (5).

2. The high-flow gas pipeline self-closing valve according to claim 1, characterized in that: the valve shell (23) comprises a shell body (231) which is in threaded connection with the valve core threaded hole (4) and is provided with an opening facing the inner chamber (24), and a shell cover (232) for sealing the inner chamber (24), wherein the air inlet hole (26) is formed in the end face, close to the air inlet cavity (3), of the shell cover (232), and the air outlet hole (28) is formed in the end face, close to the valve cavity (5), of the shell body (231).

3. The high-flow gas pipeline self-closing valve according to claim 2, characterized in that: the utility model discloses a valve plate, including casing (231), valve chamber (5), valve plate (29), self-closing spring (33), the cross section of going up slide opening (27), down slide opening (25) have been seted up on the terminal surface that casing (231) are close to valve chamber (5), set up on the terminal surface that cap (232) are close to air inlet chamber (3) with last slide opening (27) alignment down slide opening (25), be provided with both ends on valve plate (29) respectively pass last slide opening (27) and down slide opening (25) and with last slide opening (27) and down slide opening (25) sliding fit's traveller (32), on self-closing spring (33) cover was located traveller (32), the cross section of going up slide opening (27), down slide opening (25) and traveller (32) is the polygon.

4. The high-flow gas pipeline self-closing valve according to claim 3, characterized in that: offer guiding hole (9) with valve pocket (5) intercommunication on valve gap (2), valve pocket (5) internalization is provided with the top and passes rather than sliding fit's guiding hole (9) in order to stretch out pull rod (12) of valve pocket (5), be provided with diaphragm (17) that the border lies in between valve body (1) and valve gap (2) and separate into cavity (5) into cavity (51) and lower cavity (52) on pull rod (12), be provided with suction disc (16) on the bottom surface of pull rod (12), be provided with on the top surface of traveller (32) and inhale permanent magnet (35) of board (16) mutual absorption.

5. The high-flow gas pipeline self-closing valve according to claim 4, characterized in that: the valve is characterized in that the top surface of the valve body (1) is provided with an annular positioning groove (15), and the end surface of the diaphragm (17) facing the positioning groove (15) is provided with a positioning convex ring (19) which is embedded and matched with the positioning groove (15).

6. The high-flow gas pipeline self-closing valve according to claim 4, characterized in that: the diaphragm (17) center department sets up the mounting hole (18) that supplies pull rod (12) to pass, the cover is equipped with on pull rod (12) and supports tightly in iron gasket (20) on diaphragm (17) top surface, threaded connection has nut (21) with iron gasket (20) and diaphragm (17) compress tightly on suction disc (16) on pull rod (12).

7. The high-flow gas pipeline self-closing valve according to claim 4, characterized in that: an upper threaded hole (34) is formed in the top surface of the sliding column (32), a counter bore (36) aligned with the upper threaded hole (34) is formed in the center of the permanent magnet (35), and an upper fixing screw (37) in threaded connection with the upper threaded hole (34) is arranged in the counter bore (36).

8. The high-flow gas pipeline self-closing valve according to claim 4, characterized in that: screw hole (38) down seted up on the bottom surface of traveller (32), be provided with limiting plate (39) on the bottom surface of traveller (32), the center department of limiting plate (39) sets up and goes up perforation (40) that align with screw hole (38) down, wear to be equipped with on perforation (40) and screw hole (38) threaded connection's down set screw (41) down.

9. The high-flow gas pipeline self-closing valve according to claim 4, characterized in that: offer on the inner wall of valve gap (2) seal groove (10) with guiding hole (9) intercommunication, seal groove (10) are embedded to be equipped with by pull rod (12) and rather than sealed complex sealing washer (11).

10. The high-flow gas pipeline self-closing valve according to claim 4, characterized in that: the top of the pull rod (12) is provided with a pull cover (13), and the bottom surface of the pull cover (13) is provided with a rod mounting threaded hole (14) in threaded connection with the top of the pull rod (12).

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