A gas emergency shut-off valve intelligent docking station and dynamic seal structure complex

Abstract

The utility model discloses a kind of gas emergency shut-off valve intelligent expansion dock and dynamic sealing structure complex, it is related to valve field, including intelligent module, actuating mechanism component, dynamic sealing support component and valve body.In actuating mechanism component, permanent magnet and magnetic conducting sheet are alternately arranged to form constant magnetic field, relieve high-temperature magnetic attenuation problem;Dynamic sealing support component is cooperated by multiple groups of O-ring, hard sealing support sleeve and flexible material, realize multilayer sealing to block oil fume water vapor invasion, limit actuating mechanism non-up and down displacement simultaneously, improve structural stability.Sealing support sleeve outside is detachable intelligent module group, rely on explosion-proof quick-connect terminal and realize plug and play with built-in series-parallel line group.This complex can avoid valve misoperation, prolong service life, reduce maintenance difficulty, meet the demand of intelligent function expansion.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a smart expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve. Background Technology

[0002] In existing technologies, electromagnetic gas emergency shut-off valves primarily rely on an internal spring within the valve body, in conjunction with an external electromagnetic actuator, to achieve emergency shut-off of the gas pipeline. Due to cost considerations, in small-diameter products (DN50 and below), the permanent magnets used in the actuator are typically a combination of a ferrite core and a neodymium iron boron core. However, ferrite materials themselves experience significant magnetic attenuation at high temperatures, resulting in insufficient holding force when the shut-off valve is open, which can easily lead to accidental closure.

[0003] On the other hand, small-diameter products are mostly installed indoors. In high-temperature and high-fume working environments, the maintenance and repair of traditional electromagnetic shut-off valves, lacking a quick-release design for the actuator, often necessitates complete replacement. Without professional personnel, this can easily lead to gas leaks, posing a significant safety hazard.

[0004] The existing authorized utility model patent (CN113639088B) has the following problems: 1. The upper actuator is supported by spring 1. Due to the structural deformation of the spring itself, the overall stability of the upper actuator may be insufficient. 2. Because it eliminates the valve handle and dustproof observation cap design that runs through the actuator commonly found in the market, this emergency shut-off valve operates differently from traditional designs. It uses the overall up-and-down movement of the actuator to achieve the valve's on / off state. However, a certain amount of space is left at the connection between the upper actuator and the upper valve cover. This creates a risk that external oil fumes, moisture, or other impurities may contaminate the internal components of the actuator during actual installation and use.

[0005] Therefore, this utility model is proposed to address the above problems. Its main function is to provide dynamic sealing and structural stability support for the actuator. Utility Model Content

[0006] To address the technical problems mentioned above, this utility model provides a smart expansion dock for a gas emergency shut-off valve and a dynamic sealing structure integration.

[0007] This utility model is achieved by the following technical solution: a gas emergency shut-off valve intelligent expansion dock and dynamic sealing structure complex, including an intelligent module, an actuator assembly, a dynamic sealing support assembly and a valve body; The actuator components include: The wound coil and moving iron core are both located inside the actuator housing. The fixed iron core is fixed to the lower end of the magnetic guide frame. The coil frame is coaxially sleeved on the outside of the fixed iron core. The wound coil is evenly wound on the outer circumferential wall of the coil frame. The permanent magnet and the magnetic guide sheet are alternately arranged between the magnetic guide frame and the inner wall of the actuator housing to form a constant magnetic field. The moving iron core is movably inserted into the central through hole of the fixed iron core and can move up and down along the axial direction. One end of the external cable is electrically connected to the wound coil, and the other end passes through the side wall of the actuator housing and extends to the outside. The actuator sealing ring is embedded in the lower opening of the actuator housing. The dynamic seal support assembly includes: The outer shell and the upper valve cover are connected by a rotating snap-fit, and the sealing ring of the actuator is pressed between the snap-fit ​​mating surfaces of the two; the lower end of the upper valve cover is fixedly connected to the upper flange of the valve body; the sealing support sleeve is coaxially fixed in the internal cavity of the upper valve cover, the baffle is horizontally fixed inside the outer shell of the actuator, the first spring is sleeved on the outside of the sealing support sleeve, the upper end of the first spring abuts against the lower surface of the baffle, and the first O-ring is embedded in the mating gap of the sealing support sleeve; the flat diaphragm is installed at the bottom end of the second spring, the spindle is snapped into the bottom end of the moving iron core, and the second O-ring and the third O-ring are sleeved on the surface of the spindle.

[0008] As a further optimization of this utility model, permanent magnets and magnetic sheets are alternately arranged between the magnetic guide frame and the inner wall of the actuator housing, forming a stable constant magnetic field through the magnetic circuit cooperation of the two; the fixed iron core is fixed at the lower end of the magnetic guide frame, and the coil frame is coaxially sleeved on the outside of the fixed iron core, and the winding coil is evenly wound on the outer peripheral wall of the coil frame; one end of the external cable is electrically connected to the winding coil, and the other end passes through the side wall of the actuator housing and extends to the outside. In the unpowered state, the winding coil does not interfere with the constant magnetic field, and the fixed iron core can rely on the constant magnetic field to have basic adsorption capacity.

[0009] As a further optimization of this utility model, when the valve is opened, the actuator moves downward and compresses the second spring; the fixed iron core contacts and attracts the top of the moving iron core; the first spring in the valve body begins to compress in height under the tension of the second spring, and the tension of the second spring pushes the actuator upward and drives the moving iron core attracted by the fixed iron core to move upward; when the moving iron core drives the baffle to move up to the valve opening height, the internal spring force and magnetic attraction force reach a balance, thereby stabilizing and maintaining the opening state and height of the baffle.

[0010] As a further optimization of this utility model, when the valve needs to be closed, when the winding coil is energized, the magnetic field of the fixed iron core is broken, and the moving iron core moves downward under the tension of the second spring to close the valve; the actuator moves upward under the tension of the first spring, and continues to maintain vertical stability under the combined action of the tension of the second spring and the rotating latch between the actuator, the actuator housing and the upper valve cover.

[0011] As a further optimization of this utility model, an annular groove is provided in the center of the outer edge of the upper valve cover, and an annular boss is provided on the inner wall of the bottom of the sealing support sleeve. The sealing support sleeve and the upper valve cover are fixed by the boss and the groove.

[0012] As a further optimization of this utility model, a circular base with the same diameter as the outer edge of the upper valve cover is provided at the bottom of the actuator housing, and an O-ring sealing ring fixing groove is provided in the center of the outer circular surface of the base.

[0013] As a further optimization of this utility model, the actuator sealing ring is embedded in the lower opening of the actuator housing. When the actuator housing and the upper valve cover are connected by a rotating buckle, the actuator sealing ring is pressed between the buckle mating surfaces of the two, preventing external impurities from entering from the mating surfaces. The bottom of the actuator housing is provided with a circular base with the same diameter as the outer edge of the upper valve cover. An O-ring sealing ring fixing groove is provided in the center of the outer circular surface of the base, further strengthening the circumferential seal between the housing and the upper valve cover.

[0014] As a further optimization of this utility model, the sealing support sleeve is coaxially fixed in the internal cavity of the upper valve cover, and the lower end of the upper valve cover is fixedly connected to the upper flange of the valve body; an annular groove is provided in the center of the outer edge of the upper valve cover, and an annular boss is provided on the bottom inner wall of the sealing support sleeve. The two are fixed by the boss and the groove to ensure the sealing performance of the connection between the sealing support sleeve and the upper valve cover; the first O-ring is embedded in the mating gap of the sealing support sleeve to block the penetration of impurities at the gap. As a further optimization of this utility model, a second O-ring and a third O-ring are sleeved on the surface of the mandrel. When the actuator moves up and down, the outer edge of the O-ring seal assembly comes into dynamic contact with the inner wall of the sealing support sleeve. Since the O-ring seal assembly is made of flexible nitrile material and the sealing support sleeve is made of hard nylon material, the two can form a continuous sealing surface when they are dynamically fitted together, preventing external oil fumes, water vapor or impurities from entering the actuator through the gap between the mandrel and the sealing support sleeve.

[0015] As a further optimization of this utility model, a smart module base is fixedly connected to the outer side of the sealing support sleeve, and a smart module group is detachably snapped onto the outer side of the smart module base. An independent smart module group is provided on the outer wall of the outer sealing support sleeve, and an explosion-proof quick-connect terminal is provided at the bottom of the smart module group. A series-parallel wiring group is built into the cavity of the outer sealing support sleeve to realize signal and current transmission between the smart module groups.

[0016] As a further optimization of this utility model, a smart module base is fixedly connected to the outer side of the sealing support sleeve, and a smart module group is detachably snapped onto the outer side of the smart module base. A total of 4 independent smart module groups are set on the outer wall of the sealing support sleeve to realize multi-module expansion.

[0017] As a further optimization of this utility model, each intelligent module group is provided with an explosion-proof quick-connect terminal at the bottom, and a series-parallel connection group is built into the sealed support sleeve cavity; the intelligent module group is connected to the series-parallel connection group through the explosion-proof quick-connect terminal, and finally the signal transmission and current transmission between the four intelligent module groups are realized by relying on the series-parallel connection group, achieving the "plug and play" intelligent expansion effect.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model constructs a stable and constant magnetic field by alternately setting permanent magnets and magnetic sheets between the magnetic guide frame and the inner wall of the actuator housing. When the valve is opened, the balance is achieved by the tension of the second spring, the compression reaction force of the first spring, and the magnetic attraction force of the fixed iron core on the moving iron core, which can stably maintain the opening height of the baffle. This design significantly reduces the impact of high-temperature environments on the stability of the magnetic field, avoids unexpected closure when the valve is open, and improves the reliability of the valve in high-temperature indoor environments.

[0019] 2. In response to the problem in the existing patent (CN113639088B) that the upper actuator is easily unstable due to spring deformation caused by relying solely on spring support, this utility model sets up a sealing support sleeve made of hard nylon material. This sleeve is dynamically connected with the actuator housing and a flexible nitrile O-ring seal, which can effectively limit the displacement of the actuator in the radial and circumferential directions, which are not in the up and down directions. At the same time, in conjunction with the support of the first spring on the baffle and the limiting of the actuator housing and the upper valve cover rotation buckle after the valve is closed, the vertical stability of the actuator after its up and down movement and reset is ensured, avoiding component wear or functional failure caused by the shaking of the mechanism, and extending the service life of the equipment.

[0020] 3. To address the issue of oil fumes, moisture, and other impurities easily entering the gap between the actuator and the upper valve cover after the removal of the valve handle and dustproof observation cap in existing designs, this utility model constructs a multi-layer sealing system: the actuator sealing ring is pressed tightly against the snap-fit ​​surface between the outer shell and the upper valve cover, blocking impurities from the mating surface; the first O-ring seals the mating gap of the outer shell and the sealing support sleeve; the second and third O-rings on the spindle dynamically fit against the inner wall of the sealing support sleeve, forming a continuous sealing surface. The combination of rigid and flexible materials can continuously block the entry of external impurities during the movement of the actuator, protecting internal components such as the wound coil and moving iron core, reducing malfunctions caused by impurity contamination, and lowering the maintenance frequency.

[0021] 4. This utility model features an intelligent module base on the outside of the sealed support sleeve, which can detachably snap onto four independent intelligent module groups. Through the explosion-proof quick-connect terminals at the bottom of the modules and the series-parallel wiring group built into the support sleeve cavity, signal and current transmission between modules is realized, achieving "plug and play" intelligent expansion and facilitating the later addition of monitoring, control and other functions. At the same time, the actuator housing and the upper valve cover are connected by a rotating snap, allowing the actuator to be disassembled without replacing the entire unit. Even non-professionals can safely complete maintenance and repair, avoiding the gas leakage risk of the traditional whole replacement mode, and significantly reducing maintenance costs and operation difficulty. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Diagram of the disassembly and assembly of the middle structure; Figure 3 This utility model Figure 1 Front structural diagram; Figure 4 This utility model Figure 3 Schematic diagram of the middle structure; Figure 5 Here are six structural views of this utility model; Figure 6 This utility model Figure 1 Three-dimensional schematic diagram of the half-section of the middle structure.

[0023] Explanation of key symbols: 1. Actuator housing; 2. Magnetic guide frame; 3. Fixed iron core; 4. Winded coil; 5. External cable; 6. Coil frame; 7. Permanent magnet; 8. Magnetic guide sheet; 9. Baffle; 10. First spring; 11. Second spring; 12. Flat diaphragm; 13. Mandrel; 14. Moving iron core; 15. Actuator sealing ring; 16. Sealing support sleeve; 17. Upper valve cover; 18. First O-ring; 19. Second O-ring; 20. Third O-ring; 21. Valve body; 22. Intelligent module base; 23. Intelligent module assembly. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] Example 1:

[0026] Please combine Figures 1-6 This embodiment proposes a smart expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve, including a smart module, an actuator assembly, a dynamic sealing support assembly, and a valve body 21; The actuator components include: The wound coil 4 and the moving iron core 14 are both located inside the actuator housing 1. The fixed iron core 3 is fixed to the lower end of the magnetic guide frame 2. The coil frame 6 is coaxially sleeved on the outside of the fixed iron core 3. The wound coil 4 is evenly wound on the outer peripheral wall of the coil frame 6. The permanent magnet 7 and the magnetic guide sheet 8 are alternately arranged between the magnetic guide frame 2 and the inner wall of the actuator housing 1 to form a constant magnetic field. The moving iron core 14 is movably inserted into the central through hole of the fixed iron core 3 and can move up and down along the axial direction. One end of the external cable 5 is electrically connected to the wound coil 4, and the other end passes through the side wall of the actuator housing 1 and extends to the outside. The actuator sealing ring 15 is embedded in the lower opening of the actuator housing 1. The dynamic seal support assembly includes: The outer casing 1 and the upper valve cover 17 are connected by a rotating snap fastener, and the actuator sealing ring 15 is pressed between the snap fastener mating surfaces of the two; the lower end of the upper valve cover 17 is fixedly connected to the upper flange of the valve body 21; the sealing support sleeve 16 is coaxially fixed in the internal cavity of the upper valve cover 17, the baffle 9 is horizontally fixed inside the actuator outer casing 1, the first spring 10 is sleeved on the outside of the sealing support sleeve 16, the upper end of the first spring 10 abuts against the lower surface of the baffle 9, the first O-ring 18 is embedded in the mating gap of the sealing support sleeve 16; the flat diaphragm 12 is installed at the bottom end of the second spring 11, the spindle 13 is snapped onto the bottom end of the moving iron core 14, and the second O-ring 19 and the third O-ring 20 are sleeved on the surface of the spindle 13.

[0027] Specifically, permanent magnets 7 and magnetic sheets 8 are alternately arranged between the magnetic guide frame 2 and the inner wall of the actuator housing 1, forming a stable constant magnetic field through the magnetic circuit cooperation of the two; the fixed iron core 3 is fixed at the lower end of the magnetic guide frame 2, and the coil frame 6 is coaxially sleeved on the outside of the fixed iron core 3, and the winding coil 4 is evenly wound on the outer peripheral wall of the coil frame 6; one end of the external cable 5 is electrically connected to the winding coil 4, and the other end passes through the side wall of the actuator housing 1 and extends to the outside. In the unpowered state, the winding coil 4 does not interfere with the constant magnetic field, and the fixed iron core 3 can rely on the constant magnetic field to have basic adsorption capacity.

[0028] In the specific technical solution, when the valve is opened, the actuator moves downward as a whole, compressing the second spring 11 in the process. When the actuator moves to the designated position, the fixed iron core 3 contacts and attracts the top of the moving iron core 14. The first spring 10 inside the valve body 21 is subjected to the relaxation tension released by the second spring 11 and begins to compress in height. The relaxation tension of the second spring 11 continues to push the actuator upward, while simultaneously driving the moving iron core 14 attracted by the fixed iron core 3 to move upward along the axial direction. During the upward movement of the moving iron core 14, the baffle 9, which is horizontally fixed inside the actuator housing 1, moves upward simultaneously until the baffle 9 reaches the preset valve opening height. At this time, the compression reaction force of the first spring 10, the relaxation tension of the second spring 11, and the magnetic attraction force of the fixed iron core 3 on the moving iron core 14 are balanced, and the opening state and height of the baffle 9 are stably maintained, thus completing the valve opening.

[0029] A more specific technical solution involves energizing the winding coil 4 via the external cable 5 when the valve needs to be closed. The magnetic field generated by the winding coil 4 interferes with the constant magnetic field formed by the permanent magnet 7 and the magnetic conductive sheet 8, causing the magnetic field of the fixed iron core 3 to be destroyed. The attraction force of the fixed iron core 3 on the moving iron core 14 disappears, and the moving iron core 14 moves downward along the central through hole of the fixed iron core 3 under the tension released by the second spring 11. This causes the spindle 13, which is locked at the bottom of the moving iron core 14, to move downward synchronously, ultimately cutting off the internal passage of the valve body 21 and completing the valve closure. At the same time as the moving iron core 14 moves downward, the actuator is reset upward under the tension released by the first spring 10. After reset, under the combined limiting action of the tension of the second spring 11 and the rotating latch between the actuator housing 1 and the upper valve cover 17, the actuator remains vertically stable, avoiding unexpected displacement.

[0030] It should be noted that an annular groove is provided in the center of the outer edge of the upper valve cover 17, and an annular boss is provided on the inner wall of the bottom of the sealing support sleeve 16. The sealing support sleeve 16 and the upper valve cover 17 are fixed by the boss and the groove.

[0031] Furthermore, a circular base with the same diameter as the outer edge of the upper valve cover 17 is provided at the bottom of the actuator housing 1, and an O-ring fixing groove is provided in the center of the outer circular surface of the base.

[0032] The specific technical solution includes basic sealing: the actuator sealing ring 15 is embedded in the lower opening of the actuator housing 1. When the actuator housing 1 and the upper valve cover 17 are connected by a rotating snap, the actuator sealing ring 15 is pressed between the snap mating surfaces of the two, preventing external impurities from entering from the mating surfaces; the bottom of the actuator housing 1 is provided with a circular base with the same diameter as the outer edge of the upper valve cover 17, and an O-ring sealing ring fixing groove is provided in the center of the outer circular surface of the base, further strengthening the circumferential seal between the housing and the upper valve cover 17; More specifically, the internal gap sealing is achieved as follows: the sealing support sleeve 16 is coaxially fixed in the internal cavity of the upper valve cover 17, and the lower end of the upper valve cover 17 is fixedly connected to the upper flange of the valve body 21; an annular groove is provided in the center of the outer edge of the upper valve cover 17, and an annular boss is provided on the bottom inner wall of the sealing support sleeve 16. The two are fixed by the boss and the groove, ensuring the sealing performance of the connection between the sealing support sleeve 16 and the upper valve cover 17; the first O-ring 18 is embedded in the mating gap of the sealing support sleeve 16 to block the penetration of impurities at the gap. A further technical solution is dynamic sealing: the second O-ring 19 and the third O-ring 20 are sleeved on the surface of the mandrel 13. When the actuator moves up and down, the outer edge of the O-ring combination dynamically contacts the inner wall of the sealing support sleeve 16. Because the O-ring combination is made of flexible nitrile material and the sealing support sleeve 16 is made of hard nylon material, the two can form a continuous sealing surface when they are dynamically fitted together, preventing external oil fumes, water vapor or impurities from entering the actuator through the gap between the mandrel 13 and the sealing support sleeve 16.

[0033] A further technical solution involves a smart module base 22 fixedly connected to the outer side of the sealing support sleeve 16, and a smart module group 23 detachably snapped onto the outer side of the smart module base 22. Four independent smart module groups 23 are provided on the outer wall of the outer sealing support sleeve 16. Each smart module group 23 has an explosion-proof quick-connect terminal at its bottom. Series and parallel wiring groups are built into the cavity of the outer sealing support sleeve 16 to achieve signal and current transmission between the smart module groups 23.

[0034] Specific technical solution, module installation: The outer side of the sealing support sleeve 16 is fixedly connected to the intelligent module base 22, and the outer side of the intelligent module base 22 is detachably snapped with the intelligent module group 23. A total of 4 independent intelligent module groups 23 are set on the outer wall of the sealing support sleeve 16 to realize multi-module expansion. Signal and current transmission: Each intelligent module group 23 is equipped with an explosion-proof quick-connect terminal at the bottom, and a series-parallel connection group is built into the cavity of the sealed support sleeve 16; the intelligent module group 23 is connected to the series-parallel connection group through the explosion-proof quick-connect terminal, and finally the signal and current transmission between the four intelligent module groups 23 is realized by relying on the series-parallel connection group, achieving the "plug and play" intelligent expansion effect.

[0035] Working principle of the intelligent expansion dock and dynamic sealing structure complex for gas emergency shut-off valve: I. Principle of Establishing a Constant Magnetic Field A constant magnetic field is the foundation for actuators to achieve engagement and valve switching actions, and its establishment process is as follows: Between the magnetic guide frame 2 and the inner wall of the actuator housing 1, permanent magnets 7 and magnetic sheets 8 are arranged alternately to form a stable constant magnetic field through the magnetic circuit cooperation of the two. The fixed iron core 3 is fixed at the lower end of the magnetic guide frame 2, and the coil frame 6 is coaxially sleeved on the outside of the fixed iron core 3. The winding coil 4 is evenly wound on the outer peripheral wall of the coil frame 6. One end of the external cable 5 is electrically connected to the winding coil 4, and the other end passes through the side wall of the actuator housing 1 and extends to the outside. In the unpowered state, the winding coil 4 does not interfere with the constant magnetic field, and the fixed iron core 3 can rely on the constant magnetic field to have basic adsorption capacity.

[0036] II. Valve Opening Operation Principle The working principle of the switching valve in this utility model patent is the same as that of our company's existing utility model patent (publication number: CN113639088B), but further improvements have been made to CN113639088B: The valve opening action is achieved through the combined action of the actuator, spring force, and magnetic attraction force. The specific steps are as follows: In the initial state, the actuator descends as a whole, compressing the second spring 11 during the process. When the actuator descends to the designated position, the fixed iron core 3 contacts and attracts the top of the moving iron core 14. The first spring 10 inside the valve body 21 is subjected to the relaxation tension released by the second spring 11 and begins to compress in height. The relaxation tension of the second spring 11 continues to push the actuator upward, while simultaneously driving the moving iron core 14 attracted by the fixed iron core 3 to move upward along the axial direction. During the upward movement of the moving iron core 14, the baffle 9, which is horizontally fixed inside the actuator housing 1, moves upward simultaneously until the baffle 9 reaches the preset valve opening height. At this time, the compression reaction force of the first spring 10, the relaxation tension of the second spring 11, and the magnetic attraction force of the fixed iron core 3 on the moving iron core 14 are balanced, and the opening state and height of the baffle 9 are stably maintained, completing the valve opening.

[0037] III. Valve Closure Operation Principle The valve closing action is achieved by disrupting the constant magnetic field and relying on spring force to reset. The specific steps are as follows: When the valve needs to be closed, the winding coil 4 is energized through the external cable 5. The magnetic field generated by the winding coil 4 interferes with the constant magnetic field formed by the permanent magnet 7 and the magnetic sheet 8, causing the magnetic field of the fixed iron core 3 to be destroyed. The attraction force of the fixed iron core 3 on the moving iron core 14 disappears. Under the action of the tension released by the second spring 11, the moving iron core 14 moves downward along the central through hole of the fixed iron core 3, driving the spindle 13, which is locked at the bottom of the moving iron core 14, to move downward synchronously, and finally realize the cut-off of the internal passage of the valve body 21, thus completing the valve closure. At the same time as the moving iron core 14 moves downward, the actuator is reset upward under the action of the tension released by the first spring 10. After reset, under the combined limiting action of the tension of the second spring 11 and the rotating buckle between the actuator housing 1 and the upper valve cover 17, the actuator remains vertically stable, avoiding unexpected displacement.

[0038] The further improvements made by this utility model to the technical solution of utility model patent CN113639088B are as follows: (I) Sealing Structure Fitting Principle Basic sealing: The actuator sealing ring 15 is embedded in the lower opening of the actuator housing 1. When the actuator housing 1 and the upper valve cover 17 are connected by a rotating snap, the actuator sealing ring 15 is pressed between the snap mating surfaces of the two, preventing external impurities from entering from the mating surfaces. The bottom of the actuator housing 1 is provided with a circular base with the same diameter as the outer edge of the upper valve cover 17. An O-ring sealing ring fixing groove is provided in the center of the outer circular surface of the base, which further strengthens the circumferential seal between the housing and the upper valve cover 17. Internal gap sealing: The sealing support sleeve 16 is coaxially fixed in the internal cavity of the upper valve cover 17, and the lower end of the upper valve cover 17 is fixedly connected to the upper flange of the valve body 21; the outer edge of the upper valve cover 17 is provided with an annular groove in the center, and the bottom inner wall of the sealing support sleeve 16 is provided with an annular boss. The two are fixed by the boss and the groove to ensure the sealing performance of the connection between the sealing support sleeve 16 and the upper valve cover 17; the first O-ring 18 is embedded in the mating gap of the sealing support sleeve 16 to block the penetration of impurities at the gap; Dynamic sealing: The second O-ring 19 and the third O-ring 20 are sleeved on the surface of the spindle 13. When the actuator moves up and down, the outer edge of the O-ring combination dynamically contacts the inner wall of the sealing support sleeve 16. Because the O-ring combination is made of flexible nitrile material and the sealing support sleeve 16 is made of hard nylon material, the two can form a continuous sealing surface when they are dynamically fitted together, preventing external oil fumes, water vapor or impurities from entering the actuator through the gap between the spindle 13 and the sealing support sleeve 16.

[0039] (2) Structural support principle The sealing support sleeve 16 not only performs the sealing function, but also provides structural support for the actuator: through the indirect connection with the actuator housing 1, relying on the conduction of the first spring 10 and the baffle 9, and the dynamic connection with the O-ring seal, the sealing support sleeve 16 can limit the displacement of the actuator in non-upward and downward directions, such as radial and circumferential directions, thus solving the problem of insufficient overall stability of the actuator caused by traditional spring support.

[0040] IV. Signal and Current Transmission Principle of Intelligent Modules The smart docking station function is achieved through detachable modular connections and built-in wiring. The specific principle is as follows: Module installation: A smart module base 22 is fixedly connected to the outside of the sealing support sleeve 16. A smart module group 23 is detachably snapped onto the outside of the smart module base 22. A total of 4 independent smart module groups 23 are set on the outer wall of the sealing support sleeve 16 to realize multi-module expansion. Signal and current transmission: Each intelligent module group 23 is equipped with an explosion-proof quick-connect terminal at the bottom, and a series-parallel connection group is built into the cavity of the sealed support sleeve 16; the intelligent module group 23 is connected to the series-parallel connection group through the explosion-proof quick-connect terminal, and finally the signal and current transmission between the four intelligent module groups 23 is realized by relying on the series-parallel connection group, achieving the "plug and play" intelligent expansion effect.

[0041] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A smart expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve, characterized in that: Includes intelligent module, actuator assembly, dynamic seal support assembly and valve body (21); The dynamic seal support assembly includes: The outer shell (1) and the upper valve cover (17) are connected by a rotating snap fastener, and the actuator sealing ring (15) is pressed between the two snap fastener mating surfaces; the lower end of the upper valve cover (17) is fixedly connected to the upper flange of the valve body (21); the sealing support sleeve (16) is coaxially fixed in the internal cavity of the upper valve cover (17), the baffle (9) is horizontally fixed inside the outer shell (1) of the actuator, the first spring (10) is sleeved on the outside of the sealing support sleeve (16), the upper end of the first spring (10) abuts against the lower surface of the baffle (9), the first O-ring (18) is embedded in the mating gap of the sealing support sleeve (16); the flat diaphragm (12) is installed at the bottom end of the second spring (11), the spindle (13) is snapped at the bottom end of the moving iron core (14), and the second O-ring (19) and the third O-ring (20) are sleeved on the surface of the spindle (13).

2. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 1, characterized in that, The actuator components include: The winding coil (4) and the moving iron core (14) are both located inside the actuator housing (1). The fixed iron core (3) is fixed at the lower end of the magnetic guide frame (2). The coil frame (6) is coaxially sleeved on the outside of the fixed iron core (3). The winding coil (4) is evenly wound on the outer periphery of the coil frame (6). The permanent magnet (7) and the magnetic guide sheet (8) are alternately arranged between the magnetic guide frame (2) and the inner wall of the actuator housing (1) to form a constant magnetic field. The moving iron core (14) is movably inserted into the central through hole of the fixed iron core (3) and can move up and down along the axial direction. One end of the external cable (5) is electrically connected to the winding coil (4), and the other end passes through the side wall of the actuator housing (1) and extends to the outside. The actuator sealing ring (15) is embedded in the lower opening of the actuator housing (1).

3. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 1, characterized in that, The outer side of the sealing support sleeve (16) is fixedly connected to the intelligent module base (22), and the outer side of the intelligent module base (22) is detachably snapped with the intelligent module group (23).

4. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 1, characterized in that, An annular groove is provided in the center of the outer edge of the upper valve cover (17), and an annular boss is provided on the inner wall of the bottom of the sealing support sleeve (16). The sealing support sleeve (16) and the upper valve cover (17) are fixed by the boss and the groove.

5. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 1, characterized in that, A circular base with the same diameter as the outer edge of the upper valve cover (17) is provided at the bottom of the actuator housing (1), and an O-ring fixing groove is provided in the center of the outer circular surface of the base.

6. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 1, characterized in that, When the actuator moves up and down, the outer edge of the O-ring seal assembly comes into dynamic contact with the inner wall of the sealing support sleeve (16). The O-ring seal assembly is made of flexible nitrile material, and the outer shell sealing support sleeve (16) is made of hard nylon material. During the up and down movement of the actuator, a sealing effect is formed. The outer shell sealing support sleeve (16) can also limit the displacement of the upper actuator in the non-up and down direction by dynamically connecting with the outer shell and the O-ring seal.

7. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 2, characterized in that, The outer wall of the outer casing sealing support sleeve (16) is provided with 4 independent intelligent module groups (23). The bottom of the intelligent module group (23) is provided with explosion-proof quick-connect terminals. The inner cavity of the outer casing sealing support sleeve (16) is equipped with series and parallel wiring groups to realize signal transmission and current transmission between intelligent module groups (23).

8. A smart expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in any one of claims 1-7, characterized in that, The valve opening operation principle includes: The actuator moves downward and compresses the second spring (11); the fixed iron core (3) contacts and attracts the top of the moving iron core (14); the first spring (10) in the valve body begins to compress in height under the tension of the second spring (11), and the tension of the second spring (11) pushes the actuator upward and drives the moving iron core (14) attracted by the fixed iron core (3) to move upward; when the moving iron core (14) drives the baffle (9) to move up to the valve opening height, the internal spring force and magnetic attraction force reach a balance, thereby stabilizing and maintaining the opening state and height of the baffle (9).

9. The intelligent expansion dock and dynamic sealing structure complex for a gas emergency shut-off valve as described in claim 8, characterized in that, The valve closing operation principle includes: When the winding coil (4) is energized, the magnetic field of the fixed iron core (3) is broken, and the moving iron core (14) moves downward under the tension of the second spring (11) to close the valve; the actuator moves upward under the tension of the first spring (10), and continues to maintain vertical stability under the combined action of the tension of the second spring (11) and the rotating latch between the actuator, the actuator housing (1) and the upper valve cover (17).

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