Shaftless electromagnetic emergency cut-off valve

Abstract

The utility model relates to the technical field of cut-off valves, and particularly provides a shaftless electromagnetic emergency cut-off valve which comprises a valve body, a valve rod, a valve rod, a valve rod, a valve rod, a valve rod and a valve rod, and the valve body comprises a pipeline section and a valve body connecting section; the pipeline section is arranged in the middle of the pipeline section, and the two ends of the pipeline section communicate with each other. The lifting shell is fixedly connected to the upper portion of the valve body connecting section, a lifting cavity is formed in the lifting shell, and an electromagnet, a lifting rod, a valve rod iron column and an upper magnetic piece are sequentially arranged in the lifting cavity from top to bottom; the valve cover is arranged above the connecting section of the valve body in a sealing connection mode, a lower magnetic part and a sealing part which are integrally formed are arranged below the valve cover, and the lower magnetic part is arranged above the sealing part; the lower elastic piece is connected between the sealing piece and the valve body connecting section in an abutting mode, and the lower elastic piece is used for driving the sealing piece to move downwards so as to close the pipeline section; therefore, a traditional structural path that the pull rod penetrates through the valve cover is omitted, and the axial leakage problem caused by dynamic seal abrasion between the valve cover and the pull rod is completely eradicated.

Description

Technical Field

[0001] This application relates to the field of shut-off valve technology, and more particularly to a shaftless electromagnetic emergency shut-off valve. Background Technology

[0002] In automation systems, commonly used shut-off valves are typically composed of multiple elastic pneumatic diaphragm actuators or floating piston actuators combined with regulating valves, and are widely used for the rapid shut-off of media such as coal gas, combustion air, cold air, and flue gas.

[0003] However, existing holding-type electromagnetic emergency shut-off valves in the industry generally adopt a structure in which the pull rod passes through the valve cover and uses a double O-ring dynamic seal. The double O-ring dynamic seal is prone to wear under long-term reciprocating motion. Once the sealing surface is damaged, leakage may occur along the axial direction, posing a potential threat to the safety and reliability of the system.

[0004] Therefore, existing technologies have defects and shortcomings, and need further improvement and development. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a shaftless electromagnetic emergency shut-off valve, which aims to solve the problem that the sealing surface of the emergency shut-off valve is easily damaged after long-term use, resulting in axial leakage of gas along the emergency shut-off valve.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: A shaftless electromagnetic emergency shut-off valve, used to shut off a gas transmission pipeline, comprising:

[0007] The valve body includes a pipe section and a valve body connecting section; the pipe section is located in the middle of the pipe section, and the two ends of the pipe section are interconnected.

[0008] A lifting housing is fixedly connected to the upper part of the valve body connecting section. The lifting housing has a lifting cavity inside, and the lifting cavity is provided with an electromagnet, a lifting rod, a valve stem iron column and an upper magnetic component from top to bottom.

[0009] A valve cover, wherein the valve cover is sealed and connected above the valve body connecting section, and an integrally formed lower magnetic component and a sealing component are provided below the valve cover, wherein the lower magnetic component is located above the sealing component;

[0010] The lower elastic element abuts between the seal and the valve body connection section, and the lower elastic element is used to drive the seal to move downward to close the pipeline section;

[0011] When the lifting rod is manually pressed down, the upper magnetic component moves downward and attracts the lower magnetic component to move upward, thereby driving the sealing component to move upward and connecting the pipe section.

[0012] When the electromagnet is energized, it generates an electromagnetic force that attracts the valve stem iron column to move upward and is magnetically fixed to the upper magnetic component. When the lower magnetic component loses the magnetic attraction of the upper magnetic component, the sealing component resets downward under the force of the lower elastic component, cutting off the connection of the pipeline section.

[0013] Optionally, the seal comprises, arranged sequentially from top to bottom:

[0014] A compression plate, one end of which is abutted against the lower elastic member;

[0015] A circular sealing rubber sheet, one end of which is abutted against the other end of the pressure plate;

[0016] A fixing pin is used to fix the circular sealing rubber sheet and the pressure plate in the lower magnetic component.

[0017] Optionally, the pipe section is provided with a left-hand threaded opening and a right-hand threaded opening, both of which are used to connect to a gas pipe.

[0018] The left thread opening is provided with a left thread, and the right thread opening is provided with a right thread;

[0019] A channel area is provided between the left thread opening and the right thread opening, and a circular opening is provided at the top of the channel area. The circular opening cooperates with the circular sealing rubber sheet to connect or disconnect the connection passage of the pipe section.

[0020] Optionally, the shaftless electromagnetic emergency shut-off valve further includes an O-ring seal, which is used to seal the connection between the valve cover and the valve body.

[0021] Optionally, the transverse cross-section of the valve stem iron column is configured as a convex shape, and the valve stem iron column is provided with two protruding shoulders, which are abutted against the electromagnet.

[0022] Optionally, the lifting housing further includes an upper elastic element, which abuts between the valve stem iron column and the valve cover. The upper elastic element is used to prevent the valve stem iron column from moving downward under the action of gravity when it is not subjected to the downward force of the lifting rod, thereby causing the sealing element to move upward and connecting the pipeline section.

[0023] Optionally, the lifting housing further includes a protective film retaining platform, which is disposed on the outside of the lifting cavity and is used to prevent impurities from entering the hole where the lifting rod is inserted into the lifting cavity.

[0024] Optionally, the shaftless electromagnetic emergency shut-off valve further includes:

[0025] A protective cap is detachably connected to the lifting housing, and the protective cap is used to prevent the lifting rod from being accidentally pressed.

[0026] Optionally, the side wall of the lifting housing is further provided with a cable outlet tube, which is used to lead out the cable of the electromagnet.

[0027] Optionally, the shaftless electromagnetic emergency shut-off valve further includes:

[0028] An alarm sensor is electrically connected to the electromagnet. The alarm sensor is used to convert the alarm signal into current and then energize the electromagnet.

[0029] Compared with existing technologies, this application provides a shaftless electromagnetic emergency shut-off valve. This valve sequentially arranges an electromagnet, a lifting rod, a valve stem, and an upper magnetic component within the lifting chamber of the lifting housing. An integrally formed lower magnetic component and sealing component are located below the valve cover. Through the magnetic attraction between these components, the traditional path of the rod penetrating the valve cover is eliminated, fundamentally preventing axial leakage caused by dynamic seal wear between the valve cover and the rod. Simultaneously, the manual operation of the lifting rod and the electric triggering of the electromagnet form two control mechanisms. In the unenergized state, the valve remains open due to the attraction of the magnetic component. Upon alarm activation, the valve stem moves upward, releasing the lower magnetic component, causing the sealing component to automatically reset under the action of the lower elastic component, thus achieving a reliable shut-off function. This not only improves the overall sealing performance of the valve but also enhances the safety and responsiveness of the system operation. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view of the shaftless electromagnetic emergency shut-off valve provided in this application;

[0031] Figure 2 This is a cross-sectional view of the shaftless electromagnetic emergency shut-off valve and protective cap provided in this application;

[0032] Figure 3 It is provided in this application Figure 1 Enlarged view of point A in the middle;

[0033] Figure 4 This is a schematic block diagram illustrating the functional principle of the shaftless electromagnetic emergency shut-off valve provided in this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Shaftless electromagnetic emergency shut-off valve; 11. Valve body; 12. Lifting housing; 13. Valve cover; 14. Lower elastic element; 15. O-ring seal; 16. Upper elastic element; 17. Protective membrane retaining platform; 18. Protective cap; 19. Alarm sensor; 111. Pipe section; 112. Valve body connection section; 113. Lower magnetic element; 114. Sealing element; 121. Lifting chamber; 125. Cable outlet; 1111. Left threaded opening; 1112. Right threaded opening; 1113. Channel area; 1114. Circular opening; 1141. Pressure plate; 1142. Circular sealing rubber sheet; 1143. Fixing pin; 1211. Electromagnet; 1212. Lifting rod; 1213. Valve stem iron column; 1214. Upper magnetic element. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] Please refer to the following: Figures 1 to 4The first embodiment of this application provides a shaftless electromagnetic emergency shut-off valve 10, which is used to shut off a gas delivery pipeline. The shaftless electromagnetic emergency shut-off valve 10 includes a valve body 11, a lifting shell 12, a valve cover 13, a sealing element 114, an electromagnet 1211, and upper and lower elastic elements. The shaftless electromagnetic emergency shut-off valve 10 achieves the connection or disconnection of the gas pipeline through magnetic attraction and the cooperation of the upper and lower elastic elements, thereby effectively avoiding the problems of dynamic seal wear and axial leakage existing in traditional axial structures. The valve body 11 of the shaftless electromagnetic emergency shut-off valve 10 includes a pipeline section 111 and a valve body connecting section 112 disposed in the middle of the pipeline section 111. The two ends of the pipeline section 111 are respectively provided with a left threaded opening 1111 and a right threaded opening 1112 for connecting the gas pipeline. A channel area 1113 is formed between the left threaded opening 1111 and the right threaded opening 1112. A circular opening 1114 is provided at the top of the channel area 1113. The circular sealing rubber sheet 1142 can fit into the circular opening 1114 to cut off or connect the pipeline. The lifting housing 12 is fixedly connected to the valve body connecting section 112. The lifting housing 12 has a lifting cavity 121 inside. The lifting cavity 121 is provided with an electromagnet 1211, a lifting rod 1212, a valve stem iron column 1213, and an upper magnetic component 1214 arranged sequentially from top to bottom. The electromagnet 1211 is powered by a cable led out from the cable tube 125 and is electrically connected to the alarm sensor 19. The alarm signal is converted into current and drives the electromagnet 1211 to act. To prevent misoperation, a protective film retainer 17 and a protective cap 18 are provided on the outside of the lifting housing 12. The protective cap 18 is detachably connected to the lifting housing 12. The protective film retainer 17 prevents impurities from entering the lifting cavity 121. The valve cover 13 is sealed above the valve body connecting section 112, and the valve cover 13 and the valve body connecting section 112 are sealed by an O-ring 15. Below the valve cover 13 are an integrally formed lower magnetic component 113 and a sealing component 114. The sealing component 114, from top to bottom, includes a pressure plate 1141, a circular sealing rubber sheet 1142, and a fixing pin 1143. The circular sealing rubber sheet 1142 is fixed in the lower magnetic component 113 together with the pressure plate 1141 by the fixing pin 1143. The elastic component includes a lower elastic component 14 and an upper elastic component 16. The lower elastic component 14 is located between the sealing component 114 and the valve body connecting section 112, and has a downward pushing force to return the sealing component 114 to the closed position. The upper elastic component 16 is located between the valve stem iron column 1213 and the valve cover 13, and is used to prevent the valve stem iron column 1213 from moving downwards due to its own weight when not pressed down by the lifting rod 1212, thus avoiding accidental opening of the pipeline. When the valve is closed, the seal 114 is positioned below the circular opening 1114 under the action of the lower elastic member 14, sealing the passage of the pipe section 111.If manual valve opening is required, the operator presses down on the lifting rod 1212. The lifting rod 1212 causes the upper magnetic component 1214 to move downwards. The magnetic force of the upper magnetic component 1214 attracts the lower magnetic component 113 upwards, thereby causing the sealing component 114 to detach from the circular opening 1114, and the pipeline section 111 is connected. At this time, the magnetic force maintains the adsorption state, keeping the valve open. If the alarm sensor 19 detects an abnormality and sends an electrical signal, the electromagnet 1211 is energized and generates electromagnetic force, attracting the valve stem iron column 1213 upwards and magnetically fixing it to the upper magnetic component 1214. Since the valve stem iron column 1213 is no longer connected to the lower magnetic component 113 after moving upwards, the lower magnetic component 113, which has lost its magnetic attraction, is pushed by the lower elastic component 14, causing the sealing component 114 to move downwards. The sealing component 114 closes the circular opening 1114, cutting off the gas passage and completing the automatic closing process. Specifically, the operator can also achieve the effect of cutting off the gas passage by pulling the lifting rod 1212 upwards. This avoids the axial dynamic seal leakage problem caused by the valve stem passing through the valve cover 13 in traditional shut-off valves, effectively improving the airtightness and reliability of the valve, and making it suitable for gas transmission systems with high safety requirements.

[0040] Please refer to the following: Figures 1 to 3In some embodiments, the shaftless electromagnetic emergency shut-off valve 10 includes a valve body 11, a lifting housing 12, a valve cover 13, and a lower elastic element 14. The valve body 11 includes a pipe section 111 and a valve body connecting section 112 disposed in the middle of the pipe section 111, with the two ends of the pipe section 111 interconnected. The lifting housing 12 is fixedly connected to the upper part of the valve body connecting section 112, and the lifting housing 12 has a lifting cavity 121 inside. The lifting cavity 121 is provided with an electromagnet 1211, a lifting rod 1212, a valve stem iron column 1213, and an upper magnetic element 1214 arranged sequentially from top to bottom. The valve cover 13 is sealed and connected above the valve body connecting section 112, and an integrally formed lower magnetic element 113 and a sealing element 114 are provided below the valve cover 13. The lower magnetic element 113 is disposed on the sealing element. Above 114; the lower elastic member 14 abuts between the sealing member 114 and the valve body connecting section 112, the lower elastic member 14 is used to drive the sealing member 114 to move downward to close the pipe section 111; wherein, when the lifting rod 1212 is manually pressed down, the upper magnetic member 1214 moves downward and attracts the lower magnetic member 113 to move upward, thereby driving the sealing member 114 to move upward, so that the pipe section 111 is connected; when the electromagnet 1211 is energized, the electromagnet 1211 generates electromagnetic force to attract the valve stem iron column 1213 to move upward and magnetically fix it with the upper magnetic member 1214, when the lower magnetic member 113 loses the magnetic attraction of the upper magnetic member 1214, the sealing member 114 resets downward under the force of the lower elastic member 14, cutting off the connection passage of the pipe section 111. Furthermore, by sequentially arranging the electromagnet 1211, lifting rod 1212, valve stem iron column 1213, and upper magnetic component 1214 in the lifting cavity 121 of the lifting housing 12, and by placing an integrally formed lower magnetic component 113 and sealing component 114 below the valve cover 13, the magnetic attraction between the magnetic components eliminates the traditional structural path of the pull rod penetrating the valve cover 13, fundamentally preventing axial leakage caused by dynamic seal wear between the valve cover 13 and the pull rod. Simultaneously, the manual operation of the lifting rod 1212 and the electric triggering of the electromagnet 1211 form two control mechanisms. In the unenergized state, the valve remains open due to the attraction of the magnetic component. When an alarm is triggered, energization generates magnetic force, driving the valve stem iron column 1213 upward, releasing the lower magnetic component 113, and causing the sealing component 114 to automatically reset under the action of the lower elastic component 14, thus achieving pipeline shut-off and a reliable shut-off function. This not only improves the overall sealing performance of the valve but also enhances the safety and responsiveness of the system operation.

[0041] Please refer to the following: Figures 1 to 3In some embodiments, the sealing element 114 includes a pressure plate 1141, a circular sealing rubber sheet 1142, and a fixing pin 1143 arranged sequentially from top to bottom; one end of the pressure plate 1141 abuts against the lower elastic element 14; one end of the circular sealing rubber sheet 1142 abuts against the other end of the pressure plate 1141; and the fixing pin 1143 is used to fix the circular sealing rubber sheet 1142 and the pressure plate 1141 in the lower magnetic element 113. Furthermore, by specifically configuring the sealing element 114 as a combination structure of the pressure plate 1141, the circular sealing rubber sheet 1142, and the fixing pin 1143, the structural stability and sealing effect of the sealing element 114 are enhanced. The pressure plate 1141, acting as an intermediary between the lower elastic element 14 and the circular sealing rubber sheet 1142, can uniformly transmit elastic force, improving the sealing ability of the rubber sheet in the closed state. The setting of the fixing nail 1143 ensures that the pressure plate 1141 and the rubber sheet are firmly fixed on the lower magnetic part 113, and avoids the sealing part 114 from shifting or loosening during multiple opening and closing processes, thereby further improving the sealing reliability of the shut-off valve in long-term operation.

[0042] Please refer to the following: Figures 1 to 3 In some embodiments, the pipe section 111 is provided with a left-hand threaded opening 1111 and a right-hand threaded opening 1112, both of which are used to connect to a gas pipe; the left-hand threaded opening 1111 is provided with a left-hand thread, and the right-hand threaded opening 1112 is provided with a right-hand thread; a channel area 1113 is provided between the left-hand threaded opening 1111 and the right-hand threaded opening 1112, and a circular opening 1114 is provided at the top of the channel area 1113. The circular opening 1114 cooperates with the circular sealing rubber sheet 1142 to connect or disconnect the connecting passage of the pipe section 111. Furthermore, by providing a left-hand threaded opening 1111 and a right-hand threaded opening 1112 at both ends of the pipe section 111, and forming a channel area 1113 between the left-hand threaded opening 1111 and the right-hand threaded opening 1112, a circular opening 1114 is provided at the top of the channel area 1113, which cooperates with a circular sealing rubber sheet 1142. Thus, the pipe on / off control is achieved by moving the circular sealing rubber sheet 1142 upwards or downwards. This simplifies the valve body structure and reduces the number of sealing elements 114 through the fixed sealing surface cooperation, reducing the risk of wear and contributing to a more durable and reliable sealing state.

[0043] Please refer to the following: Figure 1 In some embodiments, the shaftless electromagnetic emergency shut-off valve 10 further includes an O-ring seal 15, which connects and seals the valve cover 13 and the valve body connection section 112. This further enhances the static sealing performance at the valve cover 13.

[0044] Please refer to the following: Figure 1 In some embodiments, the transverse cross-section of the valve stem 1213 is convex, and the valve stem 1213 has two protruding shoulders that abut against the electromagnet 1211. This ensures that the valve stem 1213 is accurately positioned and stably moved upward when attracted by electromagnetic force. Simultaneously, the structure of the two protruding shoulders enhances the contact area between the valve stem 1213 and the electromagnet 1211, helping to improve the attraction force of the electromagnetic force and the transmission accuracy of the lifting motion, thereby ensuring the responsiveness and reliability of the cut-off execution in the alarm trigger state.

[0045] Please refer to the following: Figure 1 In some embodiments, the lifting housing 12 further includes an upper elastic element 16, which abuts against the valve stem 1213 and the valve cover 13. The upper elastic element 16 prevents the valve stem 1213 from moving downwards under gravity when not subjected to the downward force of the lifting rod 1212, thus preventing the seal 114 from moving upwards and connecting the pipeline section 111. Furthermore, by providing the upper elastic element 16 in the lifting housing 12, which abuts against the valve stem 1213 and the valve cover 13, it prevents the valve stem 1213 from sinking due to gravity without the pressing force of the lifting rod 1212, causing the seal 114 to move upwards unintentionally and accidentally opening the gas path. This not only improves the device's anti-interference capability but also ensures the system's closure safety under non-human operation conditions.

[0046] Please refer to the following: Figure 1 In some embodiments, the lifting housing 12 further includes a protective film retaining platform 17, which is disposed on the outside of the lifting cavity 121. The protective film retaining platform 17 is used to prevent impurities from entering the hole through which the lifting rod 1212 is inserted into the lifting cavity 121. Furthermore, by providing the protective film retaining platform 17 on the outside of the lifting cavity 121, the protective film retaining platform 17 prevents external impurities from entering the lifting cavity 121 through the insertion hole of the lifting rod 1212, thereby effectively preventing magnetic component adsorption failures or movement jamming problems caused by the accumulation of dust, oil, or foreign matter, and enhancing the reliability of the device in complex industrial environments.

[0047] Please refer to the following: Figure 2 In some embodiments, the shaftless electromagnetic emergency shut-off valve 10 further includes a protective cap 18, which is detachably connected to the lifting housing 12. The protective cap 18 is used to prevent the lifting rod 1212 from being accidentally pressed. Furthermore, by detachably connecting the protective cap 18 to the lifting housing 12, the lifting rod 1212 is covered when no manual operation is required, preventing accidental opening of the valve due to accidental pressing of the lifting rod 1212.

[0048] Please refer to the following: Figure 1In some embodiments, the side wall of the lifting housing 12 is further provided with a cable outlet 125, which is used to lead out the cable of the electromagnet 1211. Furthermore, by providing a cable outlet 125 on the side wall of the lifting housing 12 for leading out the electromagnet 1211 cable, not only is the wiring of the electromagnet 1211 more organized and easier to install, but it also avoids cable breakage caused by wear, kinking, or accidental pulling due to long-term exposure.

[0049] Please refer to the following: Figure 4 In some embodiments, the shaftless electromagnetic emergency shut-off valve 10 further includes an alarm sensor 19. Specifically, the alarm sensor 19 can be configured as an existing gas alarm, smoke alarm, or gas detector. The alarm sensor 19 is electrically connected to the electromagnet 1211. The alarm sensor 19 converts the alarm signal into current and then energizes the electromagnet 1211. Furthermore, by setting the alarm sensor 19, which is electrically connected to the electromagnet 1211, the received alarm signal can be converted into a control current, triggering the electromagnet 1211 to operate. This enables the electrical automation alarm system to be linked with the shut-off valve, allowing the valve to quickly cut off gas supply after detecting abnormal conditions, such as gas leaks or fires, effectively improving the response efficiency and accident prevention capabilities of the entire system.

[0050] In summary, this application provides a shaftless electromagnetic emergency shut-off valve, comprising: a valve body, the valve body including a pipe section and a valve body connecting section disposed in the middle of the pipe section, the two ends of the pipe section being interconnected; a lifting shell, the lifting shell being fixedly connected to the upper part of the valve body connecting section, the lifting shell having a lifting cavity inside, the lifting cavity having an electromagnet, a lifting rod, a valve stem iron column and an upper magnetic component arranged sequentially from top to bottom; and a valve cover, the valve cover being sealed and disposed above the valve body connecting section, the valve cover having an integrally formed lower magnetic component and a sealing component below the valve cover, the lower magnetic component being disposed below the sealing component. Above the valve body is a lower elastic element, which abuts against the connection between the seal and the valve body. The lower elastic element drives the seal downwards to close the pipe section. When the pull rod is manually pressed down, the upper magnetic element moves downwards and attracts the lower magnetic element upwards, thereby moving the seal upwards and opening the pipe section. When the electromagnet is energized, it generates electromagnetic force to attract the valve stem column upwards and magnetically fix it to the upper magnetic element. When the lower magnetic element loses the magnetic attraction of the upper magnetic element, the seal returns to its original position under the force of the lower elastic element, cutting off the connection of the pipe section. Furthermore, by sequentially arranging the electromagnet, pull rod, valve stem column, and upper magnetic element in the pull-up cavity of the pull-up housing, and by providing an integrally formed lower magnetic element and seal below the valve cover, the magnetic attraction between the magnetic elements eliminates the traditional pull rod penetration path through the valve cover, fundamentally preventing axial leakage caused by dynamic seal wear between the valve cover and the pull rod. Meanwhile, the manual operation of the lifting rod and the electric triggering of the electromagnet form two control mechanisms. In the unpowered state, the valve remains open due to the magnetic attraction of the magnetic component. When an alarm is triggered, power is applied to move the valve stem upwards, releasing the lower magnetic component. This allows the seal to automatically reset under the action of the lower elastic component, thus achieving a reliable shut-off function. This not only improves the overall sealing performance of the valve but also enhances the safety and responsiveness of the system operation.

[0051] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A shaftless electromagnetic emergency shut-off valve for shutting off gas delivery pipelines, characterized in that, The shaftless electromagnetic emergency shut-off valve includes: The valve body includes a pipe section and a valve body connecting section; the pipe section is located in the middle of the pipe section, and the two ends of the pipe section are interconnected. A lifting housing is fixedly connected to the upper part of the valve body connecting section. The lifting housing has a lifting cavity inside, and the lifting cavity is provided with an electromagnet, a lifting rod, a valve stem iron column and an upper magnetic component from top to bottom. A valve cover, wherein the valve cover is sealed and connected above the valve body connecting section, and an integrally formed lower magnetic component and a sealing component are provided below the valve cover, wherein the lower magnetic component is located above the sealing component; The lower elastic element abuts between the seal and the valve body connection section, and the lower elastic element is used to drive the seal to move downward to close the pipeline section; When the lifting rod is manually pressed down, the upper magnetic component moves downward and attracts the lower magnetic component to move upward, thereby driving the sealing component to move upward and connecting the pipe section. When the electromagnet is energized, it generates an electromagnetic force that attracts the valve stem iron column to move upward and is magnetically fixed to the upper magnetic component. When the lower magnetic component loses the magnetic attraction of the upper magnetic component, the sealing component resets downward under the force of the lower elastic component, cutting off the connection of the pipeline section.

2. The shaftless electromagnetic emergency shut-off valve according to claim 1, characterized in that, The sealing element comprises, arranged sequentially from top to bottom: A compression plate, one end of which is abutted against the lower elastic member; A circular sealing rubber sheet, one end of which is abutted against the other end of the pressure plate; A fixing pin is used to fix the circular sealing rubber sheet and the pressure plate in the lower magnetic component.

3. The shaftless electromagnetic emergency shut-off valve according to claim 2, characterized in that, The pipe section is provided with a left threaded opening and a right threaded opening, both of which are used to connect to a gas pipe. The left thread opening is provided with a left thread, and the right thread opening is provided with a right thread; A channel area is provided between the left thread opening and the right thread opening, and a circular opening is provided at the top of the channel area. The circular opening cooperates with the circular sealing rubber sheet to connect or disconnect the connection passage of the pipe section.

4. The shaftless electromagnetic emergency shut-off valve according to claim 3, characterized in that, The shaftless electromagnetic emergency shut-off valve also includes an O-ring seal, which is used to seal the connection between the valve cover and the valve body.

5. The shaftless electromagnetic emergency shut-off valve according to claim 3, characterized in that, The transverse cross-section of the valve stem iron column is convex, and the valve stem iron column is provided with two protruding shoulders, which are abutted against the electromagnet.

6. The shaftless electromagnetic emergency shut-off valve according to claim 5, characterized in that, The lifting housing further includes an upper elastic element, which abuts between the valve stem iron column and the valve cover. The upper elastic element is used to prevent the valve stem iron column from moving downward under the action of gravity when it is not subjected to the downward force of the lifting rod, thereby causing the sealing element to move upward and connecting the pipeline section.

7. The shaftless electromagnetic emergency shut-off valve according to claim 5, characterized in that, The lifting housing further includes a protective film retaining platform, which is disposed on the outside of the lifting cavity and is used to prevent impurities from entering the hole into which the lifting rod is inserted into the lifting cavity.

8. The shaftless electromagnetic emergency shut-off valve according to claim 6, characterized in that, The shaftless electromagnetic emergency shut-off valve also includes: A protective cap is detachably connected to the lifting housing, and the protective cap is used to prevent the lifting rod from being accidentally pressed.

9. The shaftless electromagnetic emergency shut-off valve according to claim 8, characterized in that, The side wall of the lifting housing is also provided with a cable outlet tube, which is used to lead out the cable of the electromagnet.

10. The shaftless electromagnetic emergency shut-off valve according to claim 1, characterized in that, The shaftless electromagnetic emergency shut-off valve also includes: An alarm sensor is electrically connected to the electromagnet. The alarm sensor is used to convert the alarm signal into current and then energize the electromagnet.

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