Pull rod reset type cut-off valve cut-off remote transmission device

Abstract

The invention relates to a pull rod reset type cut-off remote transmission device of a cut-off valve, and relates to the field of gas safety cut-off valves, the pull rod reset type cut-off remote transmission device comprises a shell fixedly installed on a valve body through a flange plate, an upper sealing plate and a lower sealing plate, the upper sealing plate and the lower sealing plate are arranged in the valve body, the bottom of the shell penetrates through and is slidably connected with a sleeve, and the lower end of the sleeve is fixedly connected with the upper sealing plate; the lower end of the pull rod penetrates through the upper sealing plate and is fixedly connected with the lower sealing plate, the upper end of the shell is fixedly connected with a sealing cover, the upper end of the sealing cover penetrates through and is fixedly connected with a column rod, the upper end of the pull rod penetrates through and is slidably connected into the column rod, a membrane is arranged in the shell, and a thrust mechanism is arranged on the inner wall of the shell. A triggering mechanism is arranged on the thrust mechanism, and the diaphragm is connected with the triggering mechanism. The device remotely transmits an alarm after the cut-off action of the cut-off valve, so that a person in charge can quickly find the specific position of the gas safety cut-off valve in a gas cut-off accident, and quick resetting and gas supply recovery are facilitated after a fault is removed.

Description

Technical Field

[0001] The invention relates to the field of gas safety cut-off valves, in particular to a pull-rod reset type cut-off valve cut-off remote transmission device. Background Art

[0002] The gas safety shut-off valve is often used in combination with a pressure regulating valve. The pressure regulating valve can automatically change the gas flow to stabilize the outlet pressure. The main function of the gas safety shut-off valve is to monitor the outlet pressure of the pressure regulating valve. When the rear end pressure is abnormally over-pressured, the shut-off valve will quickly cut off the gas flow to prevent the rear end pressure from continuing to rise and causing subsequent pipeline accidents. The existing gas safety shut-off valve is prone to poor sealing of the valve port after cutting off the gas, and it is not possible to promptly identify which position of the gas safety shut-off valve has performed the shut-off action. The responsible person cannot promptly discover the gas outage accident and cannot quickly reach the gas safety shut-off valve to restore the gas supply. In view of this, we propose a pull rod reset shut-off valve cut-off remote transmission device. Summary of the invention

[0003] The object of the present invention is to provide a pull rod reset type cut-off valve cut-off remote transmission device to solve the problems raised in the above background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pull rod reset type cut-off valve cut-off remote transmission device, comprising a shell body fixedly installed on the valve body through a flange, and also comprising an upper sealing plate and a lower sealing plate arranged in the valve body, the upper sealing plate and the lower sealing plate are arranged on the upper and lower sides of the valve port, and are used to block the upper and lower ends of the valve port, the bottom of the shell body passes through and is slidably connected to a sleeve, and the lower end of the sleeve is fixedly connected to the upper sealing plate, the sleeve is inserted and slidably connected to a pull rod, and the lower end of the pull rod passes through the upper sealing plate and is fixedly connected to the lower sealing plate, the upper end of the shell body is fixedly connected to a cover, and the upper end of the cover passes through and is fixedly connected to a column rod, a channel is opened on the side wall of the column rod, and the two ends of the channel are connected to the inner and outer sides of the cover, the outer port of the channel is connected to the signal pipe, the upper end of the pull rod passes through and is slidably connected in the column rod, a backstop assembly is arranged on the column rod, a diaphragm is arranged inside the shell, a thrust mechanism is arranged on the inner wall of the shell, and a trigger mechanism is arranged on the thrust mechanism, and the diaphragm is connected to the trigger mechanism.

[0004] Preferably, a sealing gasket is provided on one side of the upper sealing plate and the lower sealing plate facing the valve port end.

[0005] Preferably, a groove is provided at the upper end of the column, and the upper end of the pull rod is located in the groove, a proximity switch for detecting the position of the pressure plate is fixed on the side wall of the groove, the end of the pull rod located in the groove is fixedly connected to the pressure plate, and the upper end of the column is detachably fixedly connected with a cap for covering the groove.

[0006] Preferably, the backstop assembly includes a sliding hole formed on the side wall of the column, the sliding hole is arranged on the outer side of the cover, a backstop pin is inserted and slidably connected in the sliding hole, a backstop groove corresponding to the sliding hole is formed on the side wall of the pull rod, the end of the backstop pin pointing to the inside of the column can be inserted in the backstop groove, and the end of the backstop pin pointing to the outside of the column is connected to the outer wall of the column through spring 2.

[0007] Preferably, the diaphragm is an annular structure, the outer ring edge of the diaphragm is clamped on the opening edge of the shell through a sealing cover, and a rubber pad is provided on the shell, the rubber pad is located on the lower side of the diaphragm, the lower end of the column rod is coaxially fixedly connected to the ring plate, the inner ring of the diaphragm is clamped on the bottom surface of the ring plate by a pressure ring, and the thrust mechanism and the trigger mechanism are located on the lower side of the diaphragm.

[0008] Preferably, the thrust mechanism includes a slide cylinder fixed on the inner wall of the shell, and the slide cylinder is arranged perpendicular to the pull rod and the sleeve, the slide cylinder is inserted into and slidably connected with a slide rod on the inner side of one end of the pull rod, and the end of the slide rod located inside the slide cylinder is connected to the end of the slide cylinder through a spring.

[0009] Preferably, one end of the sleeve located inside the shell is fixedly connected to protruding rod one, the pull rod is located on a section of the circumferential wall inside the shell and is fixedly connected to protruding rod two, and protruding rod two is located below the pressure ring, and one end of the sliding rod pointing to the pull rod is hinged to protruding rod one and protruding rod two respectively through two connecting rods, and the angle between the two connecting rods is set toward the pull rod.

[0010] Preferably, the trigger mechanism includes a sliding sleeve fixed on the peripheral wall of the slide cylinder, and the sliding sleeve is connected to the slide cylinder, and the sliding sleeve is inserted and slidably connected to the rack 2, and the lower end of the rack 2 is wedge-shaped, and the wedge-shaped surface is arranged facing the pull rod, and a buckle groove corresponding to the wedge-shaped end of the lower end of the rack 2 is opened on the sliding rod, and the wedge-shaped end of the lower end of the rack 2 is correspondingly inserted in the buckle groove.

[0011] Preferably, a support rod is fixed on the inner wall of the shell, and the support rod is slidably connected to rack one, the upper end of rack one is fixedly connected to the bottom surface of the diaphragm, and the fixed axis on the sliding sleeve is rotatably connected to the gear, and both sides of the gear are meshed and connected with rack one and rack two at the same time.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a diaphragm is utilized to sense the rear end pressure, thereby triggering a thrust mechanism through a trigger mechanism to apply thrust to the pull rod and the sleeve at the same time, so that the pull rod and the sleeve drive the lower sealing plate and the upper sealing plate to seal both ends of the valve port at the same time, thereby realizing rapid gas cut-off in a short time, and improving the closing performance of the valve port, which can be reliably sealed after closing to ensure the safety of gas use, and after the gas is cut off, a rapid alarm is issued when the proximity switch cannot detect the position signal of the pressure plate, thereby realizing remote transmission of the alarm after the cut-off valve performs the cut-off action, thereby enabling the responsible person to quickly discover the specific position of the gas safety cut-off valve of the gas outage accident, and facilitating rapid resetting and restoration of gas supply after the fault is eliminated.

[0013] In the present invention, the pull rod can be reset, and the operation is simple and convenient, so it is convenient for multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The schematic diagram of the cross-sectional structure of the general assembly of the present invention is shown in FIG. Figure 1 ; Figure 2 The schematic diagram of the cross-sectional structure of the general assembly of the present invention is shown in FIG. Figure 2 ; Figure 3 for Figure 1 A is an enlarged structural diagram; Figure 4 for Figure 1 The enlarged structural diagram at B in FIG.

[0015] In the figure: 1. valve body; 2. valve port; 3. shell; 4. cover; 5. flange; 6. sleeve; 7. upper cover plate; 8. pull rod; 9. lower cover plate; 10. sealing gasket; 11. protruding rod 1; 12. protruding rod 2; 13. slide cylinder; 14. connecting rod; 15. column rod; 16. cover cap; 17. pressure plate; 18. channel; 19. signal tube; 20. ring plate; 21. pressure ring; 22. rubber gasket; 23. diaphragm; 24. support rod; 25. rack 1; 26. slide rod; 27. buckle groove; 28. spring 1; 29. ​​sliding sleeve; 30. rack 2; 31. gear; 32. sliding hole; 33. backstop groove; 34. backstop pin; 35. spring 2; 36. proximity switch. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figures 1 to 4The present invention provides a technical solution: a pull rod reset type cut-off valve cut-off remote transmission device, comprising a shell 3 fixedly mounted on a valve body 1 through a flange 5, and also comprising an upper sealing plate 7 and a lower sealing plate 9 arranged in the valve body 1, and a sealing gasket 10 is arranged on one side of the upper sealing plate 7 and the lower sealing plate 9 facing the end of the valve port 2, and the upper sealing plate 7 and the lower sealing plate 9 are arranged on the upper and lower sides of the valve port 2, and are used to block the upper and lower ends of the valve port 2, the bottom of the shell 3 passes through and is slidably connected to a sleeve 6, and the lower end of the sleeve 6 is fixedly connected to the upper sealing plate 7, and a pull rod 8 is inserted and slidably connected in the sleeve 6, and the pull rod 8 The lower end of the pull rod 8 passes through the upper sealing plate 7 and is fixedly connected to the lower sealing plate 9, the upper end of the shell 3 is fixedly connected to the cover 4, and the upper end of the cover 4 passes through and is fixedly connected to the column 15, a channel 18 is opened on the side wall of the column 15, and both ends of the channel 18 are connected to the inner and outer sides of the cover 4, the outer port of the channel 18 is connected to the signal tube 19, the upper end of the pull rod 8 passes through and is slidably connected in the column 15, a backstop assembly is arranged on the column 15, a diaphragm 23 is arranged inside the shell 3, a thrust mechanism is arranged on the inner wall of the shell 3, and a trigger mechanism is arranged on the thrust mechanism, and the diaphragm 23 is connected to the trigger mechanism.

[0018] In this embodiment, a groove is formed at the upper end of the column 15, and the upper end of the pull rod 8 is located in the groove. A proximity switch 36 for detecting the position of the pressure plate 17 is fixed on the side wall of the groove. The proximity switch 36 turns on the alarm system. The end of the pull rod 8 located in the groove is fixedly connected to the pressure plate 17. The upper end of the column 15 is detachably fixedly connected with a cap 16 for covering the groove.

[0019] In this embodiment, the backstop assembly includes a sliding hole 32 opened on the side wall of the column 15, the sliding hole 32 is arranged on the outer side of the cover 4, and a backstop pin 34 is inserted and slidably connected in the sliding hole 32. A backstop groove 33 corresponding to the sliding hole 32 is opened on the side wall of the pull rod 8. The end of the backstop pin 34 pointing to the inside of the column 15 can be inserted into the backstop groove 33, and the end of the backstop pin 34 pointing to the outside of the column 15 is connected to the outer wall of the column 15 through a spring 2 35.

[0020] In this embodiment, the diaphragm 23 is an annular structure, the outer ring edge of the diaphragm 23 is clamped on the opening edge of the shell 3 through the cover 4, and a rubber pad 22 is provided on the shell 3, the rubber pad 22 is located on the lower side of the diaphragm 23, the lower end of the column 15 is coaxially fixed to the ring plate 20, the inner ring of the diaphragm 23 is clamped on the bottom surface of the ring plate 20 by the pressure ring 21, and the thrust mechanism and the trigger mechanism are located on the lower side of the diaphragm 23.

[0021] In this embodiment, the thrust mechanism includes a slide 13 fixed on the inner wall of the shell 3. A plurality of slides 13 can be provided and are arranged at equal intervals along the circumferential direction of the pull rod 8, so that the pull rod 8 can be uniformly stressed when cutting, and the slide 13 is arranged perpendicular to the pull rod 8 and the sleeve 6. The slide 13 is inserted and slidably connected with a slide rod 26 on the inner side of one end of the pull rod 8, and the end of the slide rod 26 located inside the slide 13 is connected to the end of the slide 13 through a spring 28. The end of the sleeve 6 located inside the shell 3 is fixedly connected to the protruding rod 11, and the pull rod 8 is fixedly connected to the protruding rod 2 12 on a section of the circumferential wall inside the shell 3, and the protruding rod 2 12 is located below the pressure ring 21. The end of the slide 26 pointing to the pull rod 8 is hinged to the protruding rod 11 and the protruding rod 2 12 respectively through two connecting rods 14, and the angle between the two connecting rods 14 is set toward the pull rod 8.

[0022] In this embodiment, the trigger mechanism includes a sleeve 29 fixed on the peripheral wall of the slide cylinder 13, and the sleeve 29 is connected to the slide cylinder 13, and the sleeve 29 is inserted and slidably connected to the rack 2 30, and the lower end of the rack 2 30 is wedge-shaped, and the wedge-shaped surface is arranged toward the pull rod 8, and a buckle groove 27 corresponding to the wedge-shaped end of the lower end of the rack 2 30 is opened on the slide rod 26, and the wedge-shaped end of the lower end of the rack 2 30 is correspondingly inserted in the buckle groove 27, a support rod 24 is fixed on the inner wall of the shell 3, and the support rod 24 is slidably connected to the rack 1 25, and the upper end of the rack 1 25 is fixedly connected to the bottom surface of the diaphragm 23, and the fixed axis rotation connection gear 31 is on the sleeve 29, and both sides of the gear 31 are meshed and connected with the rack 1 25 and the rack 2 30 at the same time.

[0023] Working principle and advantages of the present invention: When the pull rod reset type cut-off valve cut-off remote transmission device is in use, the working process is as follows: Figure 1 The cut-off valve is open. Figure 2 In the shut-off state of the shut-off valve, under normal gas delivery conditions, the distance between the pressure plate 17 and the proximity switch 36 is 1.5 cm. At this time, the proximity switch 36 can detect the position signal of the pressure plate 17, such as Figure 1 and Figure 3As shown, the lower end of rack 1 25 is inserted into the buckle groove 27 on the slide bar 26. At this time, the spring 1 28 in the compressed state cannot push the slide bar 26 to move. When the signal tube 19 transmits the rear end gas pressure to the space above the diaphragm 23 through the channel 18, the pressure is within the safe range, and the diaphragm will not move downward or the downward movement is small, which is not enough to drive the lower end of rack 2 30 to be completely pulled out of the buckle groove 27. When the rear end gas pressure appears to be in an overpressure state, the transmission through the signal tube 19 and the channel 18 increases the air pressure in the space above the diaphragm 23 and causes the diaphragm 23 to deform downward, thereby causing the rack 1 25 to move downward and drive the rack 2 30 to move upward and disengage from the buckle groove 27 through the gear 31. At this time, the slide bar 26 is not blocked, and under the thrust of the spring 1 28, the slide bar 26 moves toward the outside of the slide tube. At the same time, the slide bar 26 applies thrust to the protruding rod 1 11 and the protruding rod 2 12 through the two connecting rods 14, so that the protruding rod 1 1 drives the sleeve 6 to move downward, so that the sleeve 6 drives the upper sealing plate 7 to seal the upper end of the valve port 2, and at the same time, the convex rod 12 drives the pull rod 8 to move upward, so that the pull rod 8 drives the lower sealing plate 9 to seal the lower end of the valve port 2, wherein the sealing gasket 10 on the upper sealing plate 7 and the lower sealing plate 9 plays a role in increasing the air tightness, realizing a rapid response to the abnormal state of gas transmission and cutting off, and adopting the upper and lower ports of the valve port 2 to seal at the same time, to ensure the reliable stability of gas cutting off and to ensure the safety of gas use, while the pull rod 8 moves upward, it drives the pressure plate 17 to move upward and away from the proximity switch 36, so that the proximity switch 36 cannot detect the position signal of the pressure plate 17, so that the proximity switch 36 is connected to the alarm system to alarm, realizing remote transmission alarm after the cut-off valve performs the cut-off action, so that the responsible person can quickly and accurately know which gas safety cut-off valve has performed the cut-off action, so as to quickly restore the gas supply after the overpressure fault is eliminated.

[0024] During the upward movement of the pull rod 8, when the upper sealing plate 7 and the lower sealing plate 9 completely block the upper and lower ports of the valve port 2, Figure 4 As shown, at this time, the pull rod 8 drives the anti-retraction groove 33 and the sliding hole 32 to align. At this time, under the action of the second spring 35, the anti-retraction pin 34 is inserted into the anti-retraction groove 33, thereby locking the pull rod 8, thereby preventing the pull rod 8 from returning to its original position due to external force or other factors, resulting in the upper sealing plate 7 and the lower sealing plate 9 not sealing the valve port 2 tightly.

[0025] When the overpressure anomaly at the rear end is relieved, the maintenance personnel opens the cover cap 16 and pulls out the stop pin 34 to release the lock on the pull rod 8 and directly press down on the pressure plate 17. The pressing method is used for resetting, which is convenient for applying force and reduces the difficulty of operation, so that the pressure plate 17 drives the pull rod 8 to move down and reset. After the reset, the pressure plate 17 is at the detection distance of the proximity switch 36, so that the proximity switch 36 is in a non-alarm state. When the pull rod 8 moves downward, it drives the lower sealing plate 9 away from the lower end of the valve port 2, thereby releasing the closure of the lower end of the valve port 2. When the pull rod 8 drives the convex rod 2 12 to move downward, and when the convex rod 2 12 moves downward, a thrust is applied to the slide rod 26 through the corresponding connecting rod 14, so that the slide rod 26 moves into the slide tube 13 and compresses the spring 1 28 to store force so as to cut off the valve port 2 for use when the rear end pressure exceeds the pressure next time. When the slide rod 26 is reset, the diaphragm 23 is reset to drive the rack 1 25 to move upward, so that the rack 1 25 drives the rack 2 30 to move downward through the gear 31, and the lower end of the rack 2 30 is inserted into the buckle groove 27.

[0026] As described above, during the process of the slide rod 26 moving and resetting into the slide tube 13, another connecting rod 14 drives the protruding rod 11 and the sleeve 6 to move up and reset, and at the same time, the sleeve 6 drives the upper sealing plate 7 away from the upper end of the valve port 2, releasing the closure of the upper end of the valve port 2, thereby completing the resetting of the pull rod 8. The operation is simple and convenient, or a magnetic control module can be set at the stop pin 34 to control the stop pin 34 to release the limit on the pull rod 8, and a remote control cylinder can be set at the cover cap 16 to drive the pull rod 8 to reset.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0028] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A pull rod reset type cut-off valve cut-off remote transmission device, comprising a housing (3) fixedly mounted on a valve body (1) via a flange (5), characterized in that: The valve body (1) further comprises an upper sealing plate (7) and a lower sealing plate (9), which are arranged on the upper and lower sides of the valve opening (2) and are used to seal the upper and lower ends of the valve opening (2). The bottom of the shell (3) penetrates and is slidably connected to the sleeve (6), and the lower end of the sleeve (6) is fixedly connected to the upper sealing plate (7). The sleeve (6) is inserted into and slidably connected to a pull rod (8), and the lower end of the pull rod (8) penetrates the upper sealing plate (7) and is fixedly connected to the lower sealing plate (9). The upper end of the shell (3) is fixedly connected to the cover (4), and the cover (4) is fixedly connected to the cover (4). A column (15) is passed through and fixedly connected at the upper end, a channel (18) is opened on the side wall of the column (15), and both ends of the channel (18) are connected to the inner and outer sides of the cover (4), the outer port of the channel (18) is connected to the signal tube (19), the upper end of the pull rod (8) passes through and is slidably connected in the column (15), a stop assembly is provided on the column (15), a diaphragm (23) is provided inside the shell (3), a thrust mechanism is provided on the inner wall of the shell (3), and a trigger mechanism is provided on the thrust mechanism, and the diaphragm (23) is connected to the trigger mechanism.

2. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 1, characterized in that: A sealing gasket (10) is provided on one side of the upper sealing plate (7) and the lower sealing plate (9) facing the end of the valve port (2).

3. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 1, characterized in that: A groove is formed at the upper end of the column (15), and the upper end of the pull rod (8) is located in the groove. The end of the pull rod (8) located in the groove is fixedly connected to a pressure plate (17). A proximity switch (36) for detecting the position of the pressure plate (17) is fixed on the side wall of the groove. A cap (16) for covering the groove is detachably fixedly connected to the upper end of the column (15).

4. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 1, characterized in that: The anti-recoil component comprises a sliding hole (32) formed on the side wall of the column (15), the sliding hole (32) being arranged on the outside of the cover (4), a anti-recoil pin (34) being inserted and slidably connected in the sliding hole (32), a anti-recoil groove (33) corresponding to the sliding hole (32) being formed on the side wall of the pull rod (8), one end of the anti-recoil pin (34) pointing to the inside of the column (15) being inserted into the anti-recoil groove (33), and one end of the anti-recoil pin (34) pointing to the outside of the column (15) being connected to the outer wall of the column (15) via a second spring (35).

5. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 1, characterized in that: The diaphragm (23) is an annular structure, the outer ring edge of the diaphragm (23) is clamped on the opening edge of the shell (3) through a cover (4), and a rubber pad (22) is provided on the shell (3), and the rubber pad (22) is located on the lower side of the diaphragm (23), the lower end of the column rod (15) is coaxially fixedly connected to the ring plate (20), the inner ring of the diaphragm (23) is clamped on the bottom surface of the ring plate (20) through a pressure ring (21), and the thrust mechanism and the trigger mechanism are located on the lower side of the diaphragm (23).

6. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 5, characterized in that: The thrust mechanism comprises a slide cylinder (13) fixed on the inner wall of the housing (3), and the slide cylinder (13) is arranged perpendicular to the pull rod (8) and the sleeve (6), and a slide rod (26) is inserted and slidably connected to the inner side of one end of the slide cylinder (13) facing the pull rod (8), and one end of the slide rod (26) located inside the slide cylinder (13) is connected to the end of the slide cylinder (13) via a spring (28).

7. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 6, characterized in that: One end of the sleeve (6) located inside the shell (3) is fixedly connected to the first protruding rod (11), and the pull rod (8) is located on a section of the peripheral wall inside the shell (3) and is fixedly connected to the second protruding rod (12), and the second protruding rod (12) is located below the pressure ring (21). One end of the sliding rod (26) pointing to the pull rod (8) is hinged to the first protruding rod (11) and the second protruding rod (12) through two connecting rods (14), and the angle between the two connecting rods (14) is set toward the pull rod (8).

8. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 7, characterized in that: The trigger mechanism comprises a sliding sleeve (29) fixed on the peripheral wall of the slide cylinder (13), and the sliding sleeve (29) is connected to the slide cylinder (13), and the sliding sleeve (29) is inserted into and slidably connected to the rack gear 2 (30), and the lower end of the rack gear 2 (30) is wedge-shaped, and the wedge-shaped surface is arranged toward the pull rod (8), and the sliding rod (26) is provided with a buckle groove (27) corresponding to the wedge-shaped end of the lower end of the rack gear 2 (30), and the wedge-shaped end of the lower end of the rack gear 2 (30) is correspondingly inserted into the buckle groove (27).

9. A pull rod reset type cut-off valve cut-off remote transmission device according to claim 8, characterized in that: A support rod (24) is fixed on the inner wall of the housing (3), and a rack gear 1 (25) is slidably connected to the support rod (24). The upper end of the rack gear 1 (25) is fixedly connected to the bottom surface of the diaphragm (23). The sliding sleeve (29) is rotatably connected to a gear gear (31). Both sides of the gear gear (31) are meshedly connected to the rack gear 1 (25) and the rack gear 2 (30) at the same time.

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