A remote transmission device for a pull rod reset type cut-off valve

Abstract

The present invention relates to a remote transmission device for a pull rod reset type cut-off valve, which relates to the field of gas safety cut-off valves. It includes a housing fixedly installed on the valve body through a flange plate, an upper sealing plate and a lower sealing plate arranged in the valve body. The bottom of the housing penetrates and is slidably connected to a sleeve. The lower end of the sleeve is fixedly connected to the upper sealing plate. A pull rod is inserted and slidably connected in the sleeve. The lower end of the pull rod penetrates the upper sealing plate and is fixedly connected to the lower sealing plate. The upper end of the housing is fixedly connected to a cover. A column rod penetrates and is fixedly connected to the upper end of the cover. The upper end of the pull rod penetrates and is slidably connected in the column rod. A diaphragm is arranged inside the housing. A thrust mechanism is arranged on the inner wall of the housing. A triggering mechanism is arranged on the thrust mechanism. The diaphragm is connected to the triggering mechanism. After the cut-off valve performs a cut-off action, this device remotely transmits an alarm, so that the person in charge can quickly find the position of the specific gas safety cut-off valve in the gas cut-off accident, which is convenient for quickly resetting after the fault is eliminated and restoring the gas supply.

Description

Technical Field

[0001] The present invention relates to the field of gas safety cut-off valves, and particularly to a cut-off remote transmission device for a pull rod reset type cut-off valve. Background Technique

[0002] Gas safety cut-off valves are often used in combination with pressure regulating valves. The pressure regulating valve can automatically change the gas flow rate to stabilize the outlet pressure. The main function of the gas safety cut-off valve is to monitor the outlet pressure of the pressure regulating valve. When the pressure at the rear end shows abnormal overpressure, the cut-off valve will quickly act to cut off the gas flow to prevent the pressure at the rear end from continuing to rise and causing subsequent pipeline accidents. Currently, the existing gas safety cut-off valves are prone to problems such as poor sealing of the valve port and poor airtightness after cutting off the gas, and it is not possible to clearly identify in a timely manner which gas safety cut-off valve has performed the cut-off action. The responsible person cannot discover the gas cut-off accident in time, which is not conducive to quickly reaching the gas safety cut-off valve to restore gas supply. In view of this, we propose a cut-off remote transmission device for a pull rod reset type cut-off valve. Summary of the Invention

[0003] The purpose of the present invention is to provide a cut-off remote transmission device for a pull rod reset type cut-off valve to solve the problems raised in the above background technique. To achieve the above purpose, the present invention provides the following technical solution: A cut-off remote transmission device for a pull rod reset type cut-off valve, including a housing fixedly installed on the valve body through a flange plate, and further including 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 housing penetrates and is slidably connected to a sleeve, and the lower end of the sleeve is fixedly connected to the upper sealing plate. A pull rod is inserted and slidably connected in the sleeve, and the lower end of the pull rod penetrates the upper sealing plate and is fixedly connected to the lower sealing plate. The upper end of the housing is fixedly connected to a cover, and a column rod penetrates and is fixedly connected to the upper end of the cover. A channel is provided on the side wall of the column rod, and both ends of the channel communicate with the inside and outside of the cover. The outer port of the channel is connected to a signal pipe. The upper end of the pull rod penetrates and is slidably connected in the column rod. A anti-retreat component is arranged on the column rod. A diaphragm is arranged inside the housing, a thrust mechanism is arranged on the inner wall of the housing, and a trigger mechanism is arranged on the thrust mechanism. The diaphragm is connected to the trigger mechanism.

[0004] Preferably, sealing gaskets are arranged on one side of the upper sealing plate and the lower sealing plate facing the end of the valve port.

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

[0006] Preferably, the anti-retreat component includes a sliding hole formed in the side wall of the column rod. The sliding hole is arranged outside the cover. A anti-retreat pin is inserted and slidably connected in the sliding hole. A anti-retreat groove corresponding to the sliding hole is formed in the side wall of the pull rod. One end of the anti-retreat pin pointing to the inside of the column rod can be inserted into the anti-retreat groove. One end of the anti-retreat pin pointing to the outside of the column rod is connected to the outer side wall of the column rod through the second spring.

[0007] Preferably, the diaphragm is of an annular structure. The outer ring edge of the diaphragm is clamped on the opening edge of the housing by the cover. And a rubber pad is arranged on the housing and is located under the diaphragm. The lower end of the column rod is coaxially fixedly connected with a ring plate. The inner ring edge of the diaphragm is clamped on the bottom surface of the ring plate by a pressing ring. And the thrust mechanism and the triggering mechanism are located under the diaphragm.

[0008] Preferably, the thrust mechanism includes a sliding cylinder fixed on the inner wall of the housing. And the sliding cylinder is perpendicular to the pull rod and the sleeve. A sliding rod is inserted and slidably connected to the inner side of one end of the sliding cylinder facing the pull rod. And one end of the sliding rod located inside the sliding cylinder is connected to the end of the sliding cylinder through the first spring.

[0009] Preferably, one end of the sleeve located inside the housing is fixedly connected with a first convex rod. A second convex rod is fixedly connected to the peripheral wall of a section of the pull rod located inside the housing. And the second convex rod is located below the pressing ring. One end of the sliding rod pointing to the pull rod is respectively hinged to the first convex rod and the second convex rod through two connecting rods. And the included angle of the two connecting rods faces the pull rod.

[0010] Preferably, the triggering mechanism includes a sliding sleeve fixed on the peripheral wall of the sliding cylinder. And the sliding sleeve is communicated with the sliding cylinder. A second rack is inserted and slidably connected in the sliding sleeve. And the lower end of the second rack is wedge-shaped. And the wedge surface faces the pull rod. A buckling groove corresponding to the wedge-shaped end of the lower end of the second rack is formed on the sliding rod. And the wedge-shaped end of the lower end of the second rack is correspondingly inserted into the buckling groove.

[0011] Preferably, a support rod is fixed on the inner wall of the housing. And a first rack is slidably connected to the support rod. The upper end of the first rack is fixedly connected to the bottom surface of the diaphragm. A gear is rotatably connected to the sliding sleeve by a fixed shaft. The two sides of the gear are simultaneously meshed with the first rack and the second rack.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] In the present invention, a diaphragm is used to sense the back-end pressure, so as to trigger a thrust mechanism through a triggering mechanism to simultaneously apply thrust to a pull rod and a sleeve, causing the pull rod and the sleeve to drive a lower sealing plate and an upper sealing plate to simultaneously seal both ends of a valve port, thereby achieving rapid gas cut-off within a short time, improving the closing performance of the valve port, ensuring reliable sealing after closing, guaranteeing the safety of gas use, and after cutting off the gas, quickly alarming by detecting that the position signal of a pressing plate cannot be detected by a proximity switch, realizing remote transmission alarm after the cut-off valve performs a cut-off action, so that the person in charge can quickly find the position of the specific gas safety cut-off valve in case of a gas cut-off accident, facilitating quick reset after the fault is eliminated and resuming gas supply.

[0014] In the present invention, the pull rod can be reset, and the operation is simple and convenient, which is convenient for multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional structure diagram of the general assembly of the present invention Figure 1 ;

[0016] Figure 2 is a schematic cross-sectional structure diagram of the general assembly of the present invention Figure 2 ;

[0017] Figure 3 is Figure 1 an enlarged schematic structure diagram of part A in

[0018] Figure 4 is Figure 1 an enlarged schematic structure diagram of part B in

[0019] In the figure: 1, valve body; 2, valve port; 3, housing; 4, cover; 5, flange; 6, sleeve; 7, upper sealing plate; 8, pull rod; 9, lower sealing plate; 10, sealing gasket; 11, first convex rod; 12, second convex rod; 13, sliding cylinder; 14, connecting rod; 15, column rod; 16, cap; 17, pressing plate; 18, channel; 19, signal pipe; 20, ring plate; 21, pressure ring; 22, rubber gasket; 23, diaphragm; 24, support rod; 25, first rack; 26, sliding rod; 27, buckling groove; 28, first spring; 29, sliding sleeve; 30, second rack; 31, gear; 32, sliding hole; 33, anti-retreat groove; 34, anti-retreat pin; 35, second spring; 36, proximity switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 4 , the present invention provides a technical solution: a pull rod reset type cut-off valve cut-off remote transmission device, which includes a housing 3 fixedly installed on a valve body 1 through a flange 5, and also includes an upper sealing plate 7 and a lower sealing plate 9 arranged in the valve body 1. Sealing gaskets 10 are arranged on one side of the upper sealing plate 7 and the lower sealing plate 9 facing the end of the valve port 2. 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 housing 3 penetrates 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. A pull rod 8 is inserted and slidably connected in the sleeve 6, 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 housing 3 is fixedly connected to a cover 4, and a column rod 15 penetrates and is fixedly connected to the upper end of the cover 4. A channel 18 is opened on the side wall of the column rod 15, and both ends of the channel 18 communicate with the inside and outside of the cover 4. A signal pipe 19 is connected to the outer port of the channel 18. The upper end of the pull rod 8 penetrates and is slidably connected in the column rod 15. A non-return component is arranged on the column rod 15. A diaphragm 23 is arranged inside the housing 3. A thrust mechanism is arranged on the inner wall of the housing 3, and a trigger mechanism is arranged on the thrust mechanism. The diaphragm 23 is connected to the trigger mechanism.

[0022] In this embodiment, a groove is opened at the upper end of the column rod 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 is connected to an 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 rod 15 is detachably fixedly connected with a cap 16 for covering the groove.

[0023] In this embodiment, the non-return component includes a sliding hole 32 opened on the side wall of the column rod 15. The sliding hole 32 is arranged outside the cover 4. A non-return pin 34 is inserted and slidably connected in the sliding hole 32. A non-return groove 33 corresponding to the sliding hole 32 is opened on the side wall of the pull rod 8. The end of the non-return pin 34 pointing to the inside of the column rod 15 can be inserted into the non-return groove 33. The end of the non-return pin 34 pointing to the outside of the column rod 15 is connected to the outer side wall of the column rod 15 through a second spring 35.

[0024] In this embodiment, the diaphragm 23 is of an annular structure. The outer ring edge of the diaphragm 23 is clamped on the opening edge of the housing 3 through the cover 4, and a rubber gasket 22 is arranged on the housing 3. The rubber gasket 22 is located below the diaphragm 23. The lower end of the column rod 15 is coaxially fixedly connected with a ring plate 20. The inner ring edge 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 below the diaphragm 23.

[0025] In this embodiment, the thrust mechanism includes a sliding cylinder 13 fixed to the inner wall of the housing 3. Multiple sliding cylinders 13 can be provided and arranged at equal intervals along the circumferential direction of the pull rod 8, so as to keep the force on the pull rod 8 uniform during cutting. The sliding cylinder 13 is arranged perpendicular to the pull rod 8 and the sleeve 6. A sliding rod 26 is inserted and slidably connected to the inner side of the end of the sliding cylinder 13 facing the pull rod 8. One end of the sliding rod 26 located inside the sliding cylinder 13 is connected to the end of the sliding cylinder 13 through a first spring 28. One end of the sleeve 6 located inside the housing 3 is fixedly connected with a first convex rod 11. A second convex rod 12 is fixedly connected to the circumferential wall of a section of the pull rod 8 located inside the housing 3, and the second convex rod 12 is located below the pressure ring 21. The end of the sliding rod 26 pointing to the pull rod 8 is respectively hinged to the first convex rod 11 and the second convex rod 12 through two connecting rods 14, and the included angle of the two connecting rods 14 is set towards the pull rod 8.

[0026] In this embodiment, the triggering mechanism includes a sliding sleeve 29 fixed to the circumferential wall of the sliding cylinder 13, and the sliding sleeve 29 is communicated with the sliding cylinder 13. A second rack 30 is inserted and slidably connected in the sliding sleeve 29, and the lower end of the second rack 30 is wedge-shaped, and the wedge surface is set towards the pull rod 8. A buckle groove 27 corresponding to the wedge-shaped end of the lower end of the second rack 30 is formed on the sliding rod 26, and the wedge-shaped end of the lower end of the second rack 30 is correspondingly inserted into the buckle groove 27. A support rod 24 is fixed to the inner wall of the housing 3, and a first rack 25 is slidably connected to the support rod 24. The upper end of the first rack 25 is fixedly connected to the bottom surface of the diaphragm 23. A gear 31 is rotatably connected to the sliding sleeve 29 through a fixed shaft, and both sides of the gear 31 are meshed with the first rack 25 and the second rack 30 at the same time.

[0027] The working principle and advantages of the present invention: When the pull rod reset type cut-off valve remote transmission device is in use, the working process is as follows:

[0028] Figure 1 It is the open state of the cut-off valve. Figure 2 It is the cut-off state of the cut-off valve. In the normal gas transmission state, the distance between the pressing 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 pressing plate 17, as shown in 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.

[0029] 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.

[0030] After the abnormal overpressure of the back-end pressure is relieved, the maintenance personnel open the cap 16, pull out the anti-backlash pin 34, release the locking of the pull rod 8, and directly press down on the pressure plate 17. The reset is performed by pressing down, which is convenient for applying force and reduces the operation difficulty. The pressure plate 17 drives the pull rod 8 to move downward and reset. After resetting, 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, releasing the sealing of the lower end of the valve port 2. At the same time, the pull rod 8 drives the second convex rod 12 to move downward, and when the second convex rod 12 moves downward, it applies a thrust to the sliding rod 26 through the corresponding connecting rod 14, so that the sliding rod 26 moves into the sliding cylinder 13 and compresses the first spring 28 to store energy, so as to cut off the valve port 2 when encountering abnormal overpressure of the back-end pressure next time. When the sliding rod 26 is reset, at this time, the diaphragm 23 resets and drives the first rack 25 to move upward, so that the first rack 25 drives the second rack 30 to move downward through the gear 31, and the lower end of the second rack 30 is inserted into the buckle groove 27.

[0031] As described above, during the process of the sliding rod 26 moving into the sliding cylinder 13 and resetting, it drives the first convex rod 11 and the sleeve 6 to move upward and reset through another connecting rod 14. 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 sealing of the upper end of the valve port 2, thus completing the reset of the pull rod 8. The operation is simple and convenient. Or a magnetic control module can also be set at the anti-backlash pin 34 to control the anti-backlash pin 34 to release the limit of the pull rod 8, and a remote control cylinder can be set at the cap 16 to drive the pull rod 8 to reset.

[0032] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0033] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "back end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of 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.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, 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). The upper end of the rod (8) passes through and is fixedly connected to a column (15); a channel (18) is provided 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 a signal tube (19); the upper end of the pull rod (8) passes through and is slidably connected to 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; the diaphragm (23) is connected to the trigger mechanism; When the gas pressure at the rear end reaches an overpressure state, the gas pressure in the space above the diaphragm (23) increases through the transmission through the signal tube (19) and the channel (18), causing the diaphragm (23) to deform downward, and the sleeve (6) drives the upper sealing plate (7) to seal the upper end of the valve port (2), while the pull rod (8) drives the lower sealing plate (9) to seal the lower end of the valve port (2).

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 edge 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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