Gas self-closing valve

Abstract

The gas self-closing valve comprises a valve body, a moving assembly, a first magnetic assembly, a second magnetic assembly, a micro-leakage sensor and a control assembly. The moving assembly is slidably arranged at the air inlet of the valve body. The first magnetic assembly is slidably arranged in the valve body, and the side wall of the first magnetic assembly is connected with the end of the moving assembly to drive the moving assembly to open or close the air inlet of the valve body. The second magnetic assembly is arranged in the valve body and can move relative to the valve body and is magnetically attracted to the first magnetic assembly. The micro-leakage sensor is arranged on the valve body. The signal input end of the control assembly is connected with the micro-leakage sensor, and the control end of the control assembly is connected with the second magnetic assembly. When the micro-leakage sensor detects that the valve body has a gas micro-leakage, the control assembly is used to control the second magnetic assembly to move to the first position in the valve body, and the first magnetic assembly drives the moving assembly to move under the action of magnetic attraction to close the air inlet of the valve body. The gas self-closing valve has the advantages of abnormal small flow detection, automatic valve closing and mechanical locking by the control assembly, and the safety performance of the gas self-closing valve is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of self-closing valves, and particularly relates to a gas self-closing valve. BACKGROUND

[0002] The gas self-closing valve is usually installed on an indoor gas pipeline, and has the functions of automatic closing of gas overpressure, automatic closing of gas underpressure, automatic closing of gas overflow, etc.

[0003] When gas leaks, the self-closing valve is automatically closed through the overflow assembly installed in the self-closing valve, thereby ensuring gas safety. The structure of the existing overflow assembly is that a film divides the valve body of the self-closing valve into a pressure regulating cavity and a valve cavity, and the gas pressure difference between the pressure regulating cavity and the valve cavity is caused by the change of the gas pressure in the valve cavity. Under the action of the above gas pressure difference, the overflow assembly reciprocates, and when the valve cavity loses pressure, the overflow assembly can close the valve cavity of the self-closing valve, thereby realizing the function of closing the gas self-closing valve.

[0004] However, when a small amount of gas leaks, the valve cavity of the existing overflow assembly does not lose pressure, at which time the overflow assembly does not close the self-closing valve, so that the small gas leakage cannot be discovered in time, and thus corresponding measures cannot be taken in time, which is easy to cause property loss or safety accidents. SUMMARY

[0005] The present application provides a gas self-closing valve to solve the technical problem in the prior art that when a small amount of gas leaks, the valve cavity of the existing overflow assembly does not lose pressure, at which time the overflow assembly does not close the self-closing valve, so that the small gas leakage cannot be discovered in time, and thus corresponding measures cannot be taken in time, which is easy to cause property loss or safety accidents.

[0006] To solve the above technical problem, the gas self-closing valve disclosed in the embodiments of the present application comprises a valve body 1, and further comprises:

[0007] A moving assembly is slidingly arranged at the gas inlet of the valve body;

[0008] A first magnetic assembly is slidingly arranged in the valve body, and the side wall of the first magnetic assembly is connected to the end of the moving assembly, so as to drive the moving assembly to open or close the gas inlet of the valve body;

[0009] A second magnetic assembly is arranged in the valve body and can move relative to the valve body, and is magnetically attracted to the first magnetic assembly;

[0010] A micro-leakage sensor is arranged on the valve body;

[0011] A control assembly is connected to the micro-leakage sensor at the signal input end, and is connected to the second magnetic assembly at the control end;

[0012] When the micro-leakage sensor detects that the valve body has a gas micro-leakage, the control assembly is used to control the second magnetic assembly to move to a first position in the valve body, and the first magnetic assembly drives the moving assembly to move under the action of magnetic attraction to close the gas inlet of the valve body.

[0013] Optionally, when the moving assembly opens the gas inlet of the valve body, the control assembly controls the second magnetic assembly to remain at a second position in the valve body, and the first position and the second position are two different positions in the valve body.

[0014] Optionally, the control assembly comprises:

[0015] A control component is located in the interior of the valve body, and an information input end of the control component is connected with the micro-leakage sensor;

[0016] An action component is connected with the control component, and the action component is connected with the second magnetic assembly;

[0017] When the action component is connected with the second magnetic assembly, the action component limits the second magnetic assembly to remain at the second position in the valve body, and when the action component is not connected with the second magnetic assembly, the second magnetic assembly moves from the second position to the first position.

[0018] Optionally, the first magnetic assembly comprises:

[0019] A limiting rod is slidingly arranged in the interior of the valve body, and a trapezoidal groove is formed in the side wall of the limiting rod, the moving assembly opens the valve body when the left end of the moving assembly is located at the bottom surface of the trapezoidal groove, and the flow assembly closes the valve body when the moving assembly is located on the side wall of the limiting rod and is not located in the trapezoidal groove;

[0020] A limiting rod spring is sleeved on the outside of the limiting rod, one end of the limiting rod spring abuts against the side wall of the limiting rod, and the other end of the limiting rod spring abuts against the valve body;

[0021] A magnet is arranged on the limiting rod and magnetically attracts the second magnetic assembly.

[0022] Optionally, the second magnetic assembly comprises:

[0023] A magnet locking seat is slidingly arranged in the valve body, a limiting groove is formed in the side wall of the magnet locking seat, and the action component can be connected in the limiting groove, and when the action component is connected in the limiting groove, the second magnetic assembly remains at the second position in the valve body;

[0024] A magnet spring is sleeved on the side wall of the magnet locking seat, one end of which abuts against the valve body, and the other end abuts against the top of the magnet locking seat.

[0025] A magnetic part is fixed on the magnet locking seat and magnetically attracted to the magnet.

[0026] Optionally, the moving assembly comprises:

[0027] An overcurrent column is slidingly arranged in the air inlet channel of the valve body, one end of which abuts against the side wall of the limiting rod.

[0028] An overcurrent sheet is fixed on the side wall of the overcurrent column, and the overcurrent column penetrates through the overcurrent sheet.

[0029] An overcurrent spring is arranged in the air inlet channel, one end of which is connected to the valve body, and the other end abuts against the overcurrent sheet, for driving the overcurrent sheet to open the air inlet of the valve body.

[0030] When the end of the overcurrent column is located on the bottom surface of the trapezoidal groove, the overcurrent sheet opens the valve body; when the end of the overcurrent column is located on the side wall of the limiting rod and is not located in the trapezoidal groove, the overcurrent sheet closes the valve body.

[0031] Optionally, the end of the overcurrent column is in a semispherical shape.

[0032] Optionally, the manual unlocking assembly is further arranged for moving the second magnetic assembly from the first position to the second position.

[0033] Optionally, the manual unlocking assembly comprises a reset knob, a reset rotating shaft, a split pin, a reset lever and a reset spring sheet; the reset knob is rotationally arranged on the valve body; the reset rotating shaft rotates with the reset knob; the reset lever is arranged on the side wall of the reset rotating shaft and rotates with the reset rotating shaft, and the reset lever is used for pressing the second magnetic assembly, thereby increasing the distance between the first magnetic assembly and the second magnetic assembly; and the reset spring sheet is arranged on the reset rotating shaft and is used for resetting the reset knob.

[0034] Optionally, the reset lever is fixed on the reset rotating shaft through the split pin.

[0035] The gas self-closing valve provided by the embodiment of the present application comprises a valve body, a moving assembly, a first magnetic assembly, a second magnetic assembly, a micro-leakage sensor and a control assembly. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A structure schematic diagram of a gas self-closing valve provided by the embodiment of the present application.

[0037] Figure 2 A structure schematic diagram of another gas self-closing valve provided by the embodiment of the present application.

[0038] Figure 3 A connection structure schematic diagram of a flow assembly and a limiting assembly provided by the embodiment of the present application.

[0039] Figure 4 A connection structure schematic diagram of another flow assembly and limiting assembly provided by the embodiment of the present application.

[0040] Figure 5 An external structure schematic diagram of a manual unlocking assembly provided by the embodiment of the present application.

[0041] Figure 6 A structure schematic diagram of a manual unlocking assembly provided by the embodiment of the present application.

[0042] Figure 7 A structure schematic diagram of a reset spring provided by the embodiment of the present application.

[0043] In the figure, 1. Valve body; 2. Magnet; 3. Action component; 4. Push rod; 5. Magnet locking seat; 6. Magnet spring; 7. Magnetic piece; 8. Limiting part; 9. Limiting plug; 10. Limiting rod; 11. Limiting rod spring; 12. Trapezoidal groove; 13. Overflow piece; 14. Overflow spring; 15. Overflow column; 16. Reset knob; 17. Reset rotating shaft; 18. Split pin; 19. Reset lever; 20. Reset spring; 21. Power supply; 22. Loose joint; 23. Micro-leakage sensor; 24. Shell; 25. Upper cover; 26. Control component; 27. Lower cover. DETAILED DESCRIPTION

[0044] The application will be further described in detail below with reference to the accompanying drawings and specific examples.

[0045] REFERENCE Figure 1 - Figure 7 , Figure 1 A structure schematic diagram of a gas self-closing valve provided by the embodiment of the application. Figure 2 Another structure schematic diagram of a gas self-closing valve provided by the embodiment of the application. Figure 3 A connection structure schematic diagram of an overflow assembly and a limiting assembly provided by the embodiment of the application. Figure 4 Another connection structure schematic diagram of an overflow assembly and a limiting assembly provided by the embodiment of the application. Figure 5 An external structure schematic diagram of a manual unlocking assembly provided by the embodiment of the application. Figure 6 A structure schematic diagram of a manual unlocking assembly provided by the embodiment of the application. Figure 7 A structure schematic diagram of a reset spring provided by the embodiment of the application.

[0046] Before introducing the technical scheme of the application, the application scenario of the application is introduced:

[0047] At present, when gas leaks, the self-closing valve is automatically closed through the overflow assembly installed in the self-closing valve, thereby ensuring gas safety. The structure of the existing overflow assembly is through a film assembly, the film divides the valve body of the self-closing valve into a pressure regulating cavity and a valve cavity, the gas pressure difference between the pressure regulating cavity and the valve cavity is caused by the change of the gas pressure in the valve cavity, under the action of the above-mentioned gas pressure difference, the overflow assembly reciprocates, when the valve cavity loses pressure, the overflow assembly can close the valve cavity of the self-closing valve, thereby realizing the function of closing the gas self-closing valve. However, the existing overflow assembly, when a small amount of gas leaks, the valve cavity will not lose pressure, at this time, the overflow assembly does not close the self-closing valve, leading to that the small gas leakage cannot be discovered in time, thereby the corresponding measures cannot be taken effectively and in time, which is easy to cause property loss or safety accidents.

[0048] In order to solve the above problems, the applicant conceives that a micro-leakage sensor can be added to the existing gas self-closing valve to detect the gas micro-leakage of the valve body of the self-closing valve. Correspondingly, when the gas micro-leakage occurs, a device for automatically closing the gas inlet of the self-closing valve needs to be set, so as to realize the function of automatically closing the self-closing valve when the gas micro-leakage occurs.

[0049] Based on the above overall concept, the technical scheme of the present application is proposed, and the specific scheme is as follows:

[0050] As shown in Figure 1 , the gas self-closing valve disclosed by the embodiment of the present application comprises a valve body 1, further comprising: a moving assembly slidingly arranged at the gas inlet of the valve body 1; a first magnetic assembly slidingly arranged in the valve body 1, the side wall of the first magnetic assembly being clamped to the end of the moving assembly, for driving the moving assembly to open or close the gas inlet of the valve body 1; a second magnetic assembly located in the interior of the valve body 1 and movable relative to the valve body 1, and magnetically attracted to the first magnetic assembly; a micro-leakage sensor 23 arranged on the valve body 1; a control assembly, the signal input end of the control assembly being connected with the micro-leakage sensor 23, and the control end of the control assembly being connected with the second magnetic assembly; when the micro-leakage sensor 23 detects that the valve body 1 has gas micro-leakage, the control assembly is used to control the second magnetic assembly to move to a first position in the valve body 1, and the first magnetic assembly drives the moving assembly to move under the action of magnetic attraction, so as to close the gas inlet of the valve body 1.

[0051] In the example embodiment, the valve body 1 can adopt the following structure: it can comprise an upper cover 25, a lower cover 27, a pipeline, a loose joint 22 and a control knob. The structure of the valve body 1 is conventionally arranged in the art, and the present embodiment does not limit it. For details, please refer to Figure 1 and Figure 2 .

[0052] In the example embodiment, the first magnetic assembly is used to drive the moving assembly to open or close the gas inlet of the valve body 1. In the art, the means for opening or closing the valve body 1 is to close or open the gas inlet channel arranged in the valve body 1. Usually, the structure as shown in Figure 3 , 4 is adopted, that is, an annular baffle with a size smaller than the inner diameter of the pipeline is arranged in the pipeline of the valve body 1, a hollow cylinder is arranged in the middle of the annular baffle, a flow column 15 for sliding connection of the hollow cylinder is arranged, and a flow sheet 13 is arranged on the flow column 15. In the process of driving the flow sheet 13 to slide, the flow column 15 can block or open the middle part of the annular baffle, so as to realize the opening or closing of the pipeline.

[0053] In the example embodiment, the gas self-closing valve comprises a valve body 1, a moving assembly slidingly arranged at the gas inlet of the valve body 1, a first magnetic assembly slidingly arranged in the valve body 1 and clamped to the end of the moving assembly, for driving the moving assembly to open or close the gas inlet of the valve body 1, a second magnetic assembly arranged in the valve body 1 and movable relative to the valve body 1 and magnetically attracted to the first magnetic assembly, a micro-leakage sensor 23 arranged on the valve body 1, and a control assembly having a signal input end connected to the micro-leakage sensor 23 and a control end connected to the second magnetic assembly. When the micro-leakage sensor 23 detects that the valve body 1 has a gas micro-leakage, the control assembly controls the second magnetic assembly to move to a first position in the valve body 1, and the first magnetic assembly drives the moving assembly to move to close the gas inlet of the valve body 1 under the magnetic attraction. The gas self-closing valve has the advantages of abnormal small flow detection, automatic valve closing by the control assembly, mechanical locking after the valve is closed, and improved safety performance of the gas self-closing valve.

[0054] In a specific embodiment, when the moving assembly opens the gas inlet of the valve body 1, the control assembly controls the second magnetic assembly to remain at a second position in the valve body 1, and the first position and the second position are two different positions in the valve body 1.

[0055] In a specific embodiment, the control assembly comprises a control component 26 arranged in the valve body 1 and having an information input end connected to the micro-leakage sensor 23, and an action component 3 connected to the control component 26, and the action component 3 is clamped to the second magnetic assembly. When the action component 3 is clamped to the second magnetic assembly, the action component 3 limits the second magnetic assembly to remain at the second position in the valve body 1, and when the action component 3 is not clamped to the second magnetic assembly, the second magnetic assembly moves from the second position to the first position.

[0056] In the example embodiment, the action component 3 comprises a remote electromagnet and a push rod 4. The remote electromagnet drives the push rod 4 to move, and when the push rod 4 is in an extended state, the push rod 4 locks the second magnetic assembly. When the push rod 4 is in a retracted state, the second magnetic assembly moves, and under the attraction of the second magnetic assembly and the first magnetic assembly, the first magnetic assembly drives the limiting assembly to move downward, and the limiting assembly drives the moving assembly to close the valve body 1.

[0057] Specifically, the remote electromagnet is an electromagnet that can be remotely controlled. In this embodiment, the remote electromagnet can be directly purchased. Of course, the power-on or power-off of the remote electromagnet can also be controlled by the remote control control assembly to achieve the purpose of remotely controlling the remote electromagnet. In actual application, the remote control of the control assembly belongs to the conventional technical means in the art, and the present embodiment does not improve it. For example, the existing remote control scheme includes the control of a drone.

[0058] In one specific embodiment, the first magnetic assembly includes: a limiting rod 10 slidingly arranged in the interior of the valve body 1; a trapezoidal groove 12 is formed in the side wall thereof, when the left end of the moving assembly is located at the bottom surface of the trapezoidal groove 12, the moving assembly opens the valve body 1; when the moving assembly is located on the side wall of the limiting rod 10 and is not located in the trapezoidal groove 12, the moving assembly closes the valve body 1; a limiting rod spring 11 is sleeved on the outside of the limiting rod 10, one end of which abuts against the side wall of the limiting rod 10 and the other end thereof abuts against the valve body 1; a magnet 2 is arranged on the limiting rod 10 and magnetically attracts the second magnetic assembly.

[0059] In this example embodiment, the first magnetic assembly can include: a limiting plug 9, a limiting rod 10, and a limiting rod spring 11; the limiting plug 9 is arranged on the valve body 1, the limiting rod 10 is movably arranged in the valve body 1, and the limiting rod spring 11 is used to apply a spring force to the limiting rod 10 towards the limiting plug 9; a magnet 2 is arranged at the bottom of the limiting rod 10, and a trapezoidal groove 12 is formed in the side wall of the limiting rod 10; when the left end of the moving assembly is located at the bottom surface of the trapezoidal groove 12, the moving assembly opens the valve body 1; when the moving assembly is located on the side wall of the limiting rod 10 and is not located in the trapezoidal groove 12, the moving assembly closes the valve body 1.

[0060] In one specific embodiment, the second magnetic assembly includes: a magnet locking seat 5 slidingly arranged in the valve body 1, a limiting groove is formed in the side wall thereof, the action component 3 can be clamped in the limiting groove, when the action component 3 is clamped in the limiting groove, the second magnetic assembly is kept at the second position in the valve body 1; a magnet spring 6 is sleeved on the side wall of the magnet locking seat 5, one end of which abuts against the valve body 1 and the other end thereof abuts against the top of the magnet locking seat 5; a magnetic piece 7 is fixedly connected to the magnet locking seat 5 and magnetically attracts the magnet 2.

[0061] In this example embodiment, as Figure 1 , Figure 2As shown, the second magnetic assembly comprises a magnet locking seat 5, a magnet spring 6, and a magnetic piece 7. The magnet spring 6 is arranged below the magnet locking seat 5 and is used to pop up the magnet locking seat 5. The magnetic piece 7 is arranged on the top of the magnet locking seat 5. A limiting part 8 for clamping with the push rod 4 is arranged on the sidewall of the magnet locking seat.

[0062] In an embodiment, the moving assembly comprises an overflow column 15 which is slidingly arranged in the air inlet channel of the valve body 1 and abuts against the sidewall of the limiting rod 10 at one end. An overflow sheet 13 is fixedly connected to the sidewall of the overflow column 15, and the overflow column 15 penetrates through the overflow sheet 13. An overflow spring 14 is arranged in the air inlet channel and connected to the valve body 1 at one end and abuts against the overflow sheet 13 at the other end, and is used to drive the overflow sheet 13 to open the air inlet of the valve body 1. When the end of the overflow column 15 is located on the bottom surface of the trapezoidal groove 12, the overflow sheet 13 opens the valve body 1. When the end of the overflow column 15 is located on the sidewall of the limiting rod 10 and is not located in the trapezoidal groove 12, the overflow sheet 13 closes the valve body 1.

[0063] In the example embodiment, as shown in Figure 1 - Figure 4 As shown, the overflow assembly comprises an overflow sheet 13, an overflow spring 14, and an overflow column 15. One end of the overflow column 15 abuts against the limiting rod 10, and the other end is fixedly connected to the overflow sheet 13. The overflow spring 14 is used to apply elastic force to the overflow sheet 13, and the overflow spring 14 is used to drive the overflow sheet 13 to open the valve body 1. The end of the overflow column 15 is in a semispherical shape.

[0064] In an embodiment, the end of the overflow column 15 is in a semispherical shape.

[0065] In an embodiment, the manual unlocking assembly is used to move the second magnetic assembly from the first position to the second position. The manual unlocking assembly is used to adjust the distance between the first magnetic assembly and the second magnetic assembly, thereby controlling the movement of the limiting assembly, and the moving assembly opens the valve body 1 under the action of the limiting assembly.

[0066] In a specific embodiment, the manual unlocking assembly comprises a reset knob 16, a reset rotating shaft 17, a split pin 18, a reset lever 19, and a reset spring 20. The reset knob 16 is rotatably arranged on the valve body 1. The reset rotating shaft 17 rotates with the reset knob 16. The reset lever 19 is arranged on the sidewall of the reset rotating shaft 17 and rotates with the reset rotating shaft 17. The reset lever 19 is used to press the second magnetic assembly, thereby increasing the distance between the first magnetic assembly and the second magnetic assembly. The reset spring 20 is arranged on the reset rotating shaft 17 and is used to reset the reset knob 16.

[0067] In the present example embodiment, as shown in Figure 5 , Figure 6 , Figure 7 The manual unlocking assembly comprises a reset knob 16, a reset rotating shaft 17, a split pin 18, a reset lever 19, and a reset spring 20. The reset knob 16 is rotatably arranged on the valve body 1. The reset rotating shaft 17 rotates with the reset knob 16. The reset lever 19 is arranged on the sidewall of the reset rotating shaft 17 and rotates with the reset rotating shaft 17. The reset lever 19 is used to press the second magnetic assembly, thereby increasing the distance between the first magnetic assembly and the second magnetic assembly. The reset spring 20 is arranged on the reset rotating shaft 17 and is used to reset the reset knob 16.

[0068] In a specific embodiment, the reset lever 19 is fixed on the reset rotating shaft 17 by the split pin 18. The control assembly is also powered by a power source 21.

[0069] Embodiment 2

[0070] Based on the above-mentioned embodiment 1, the implementation of the present application is further described in detail in combination with the accompanying drawings:

[0071] Micro-leakage valve principle:

[0072] As shown in Figure 1 , the intelligent remote transmission gas self-closing valve is in the open valve state. At this time, the limiting rod 10 is in the rising position under the action of the limiting rod spring 11 and the limiting plug 9. At the same time, the bottom space of the trapezoidal groove 12 on the limiting rod 10 leaves the front cylindrical spherical surface of the flow piece 13, and does not limit the flow piece 13, thereby maintaining the open state of the flow assembly, and the valve is normally ventilated. At the same time, the remote electromagnet control push rod 4 extends and is clamped in the limiting portion 8 of the magnet locking seat 5, so that the magnet 2 and the magnetic part 7 are kept within a specific distance. At this time, the limiting rod spring 11 is greater than the attraction force between the upper and the magnetic part 7, so the limiting rod 10 continues to remain in the rising position, and the valve is normally opened and ventilated.

[0073] When the micro-leakage sensor 23 placed at the rear end of the valve cavity detects abnormal micro-flow, the intelligent control assembly determines that micro-leakage occurs through preset parameters, and then the intelligent control assembly powers the remote electromagnet, the electromagnet pulls back the push rod 4 to release the locking of the magnet 2 limiting portion 8, the magnetic member 7 quickly moves up to the limiting position of the shell 24 under the combined action of the attraction force of the magnet 2 and the force of the magnet spring 6, at this time the magnet 2 is lowered to the limiting position of the shell 24 under the attraction force of the magnetic member 7, while the overflow plate 13 is pushed to the right to close the overflow assembly by the pushing force of the trapezoidal slot 12 of the limiting rod 10, thereby causing the valve to be automatically closed due to throttling underpressure (as shown in Figure 3 、 Figure 4 The mechanical locking and manual unlocking principle is as follows: Figure 2

[0074] The mechanical locking and manual unlocking principle is as follows:

[0075] When the valve is automatically closed remotely, the staff needs to on-site troubleshoot and handle the fault before manually operating to unlock (if the fault is not eliminated, the valve will still be automatically closed after manual unlocking). When manually unlocking, rotate the reset knob 16 in the direction shown in Figure 4 , so that the reset knob 16 overcomes the elastic force of the reset spring 20 in Figure 6 , drives the reset rotating shaft 17 and the reset lever 19 at the end to rotate and press down the magnetic member 7, the remote electromagnet end push rod 4 is automatically locked in the card slot of the magnet 2 limiting portion 8 to lock the magnetic member 7; at the same time, the magnet 2 is separated from the magnetic member 7 by a certain distance, the attraction force is attenuated, and thus the magnet 2 is reset under the action of the limiting rod spring 11, the overflow plate 13 moves to the bottom of the trapezoidal slot 12, the overflow assembly is opened, and the valve can be safely opened. Figure 7 The reset spring 20 passes through the fixed slot through a fixed pin, one end is connected with the shell 24, and the other end is connected with the reset rotating shaft 17; after manual unlocking, the reset lever 19 rotates clockwise under the action of the reset spring 20 to return to the original position, leaving a safe space for the action of the magnetic member 7.

[0076] The mechanical locking and manual unlocking principle is as follows:

[0077] The intelligent remote transmission gas self-closing valve can monitor the flow in the valve body 1 by adding a micro-flow sensor, and automatically close the valve through remote control of the overflow assembly when the flow in the valve body 1 is overpressure or underpressure, thereby realizing double protection of remote overflow automatic closing of the valve and mechanical closing of the overflow assembly; the remote overflow automatic closing value can be set by the user, and when the monitored flow exceeds the set value, the valve intelligent control assembly 26 powers the remote electromagnet 3 to close the valve (the working principle is the same as that of the micro-leakage valve).

[0078] The user actively requires to close the valve principle:

[0079] The user actively requires to close the valve principle:​

[0080] When the user goes out without closing the manual valve or is not sure whether the manual valve is closed, the user can actively request the remote control center to remotely close the valve (working principle is the same as the micro-leakage valve closing), to ensure the user's gas safety.

[0081] The intelligent remote transmission gas self-closing valve provided by the scheme can automatically close the valve under special working conditions (micro-leakage, over-flow, active request, etc.), and has the functions of mechanical locking after closing the valve and manual unlocking. The entire automatic valve closing structure adopts a magnetic attraction principle, effectively isolates the gas passage from the control module, avoids the entry of gas into the control area (live area), and at the same time, the structure increases the leakage and improves the reliability of the valve seal. The valve closing principle of the structure is to affect the action of the overflow piece 13 through the limiting rod 10, thereby closing the valve. The structure is more sensitive and effective in control precision, and at the same time avoids affecting the main structure of the self-closing valve, thereby not affecting the overpressure, underpressure, and mechanical overflow functions of the self-closing valve, and ensuring the reliability and maintainability of the self-closing valve.

[0082] The existing self-closing valve does not have the function of micro-leakage detection, so the self-closing valve product has more complete and safe and reliable functions. The modular design increases the functions of flow monitoring, leakage alarm, automatic valve closing, remote control, etc. without affecting the original self-closing valve function and structure, which is equivalent to integrating the functions of traditional self-closing valves, gas alarms, and solenoid valves. It can be used with the Internet of Things to realize real-time and effective big data management, thereby realizing the management and use of smart gas. Users can remotely and automatically close the valve, making the use of gas more safe and convenient.

[0083] It should be noted that the above described embodiments are part of the embodiments of the application, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the application. In this specification, each embodiment focuses on the differences from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

Claims

1. Gas self-closing valve comprising a valve body (1), characterized in that, Also include: Mobile components, slidingly arranged at the air inlet of the valve body (1); First magnetic components, slidingly arranged in the valve body (1), the side wall of which is clamped to the end of the mobile component, used to drive the mobile component to open or close the air inlet of the valve body (1); the first magnetic component includes: a limiting rod (10) slidingly arranged in the valve body (1); a trapezoidal groove (12) is formed in the side wall thereof; when the left end of the mobile component is located at the bottom surface of the trapezoidal groove (12), the mobile component opens the valve body (1); when the mobile component is located on the side wall of the limiting rod (10) and not located in the trapezoidal groove (12), the flow component closes the valve body (1); a limiting rod spring (11) is sleeved on the outside of the limiting rod (10), one end of which abuts against the side wall of the limiting rod (10), and the other end abuts against the valve body (1); a magnet (2) is arranged on the limiting rod (10) and magnetically attracted to the second magnetic component; The second magnetic component is located in the valve body (1) and can move relative to the valve body (1) and is magnetically attracted to the first magnetic component; the second magnetic component includes: a magnet locking seat (5) slidingly arranged in the valve body (1), a limiting groove is formed in the side wall thereof, and an action component (3) can be clamped in the limiting groove; when the action component (3) is clamped in the limiting groove, the second magnetic component is kept at a second position in the valve body (1); a magnet spring (6) is sleeved on the side wall of the magnet locking seat (5), one end of which abuts against the valve body (1), and the other end abuts against the top of the magnet locking seat (5); a magnetic part (7) is fixedly connected to the magnet locking seat (5) and magnetically attracted to the magnet (2); A micro-leakage sensor (23) is arranged on the valve body (1); A control component, the signal input end of which is connected with the micro-leakage sensor (23), and the control end of which is connected with the second magnetic component; A manual unlocking component, which is used to move the second magnetic component from a first position to a second position; When the micro-leakage sensor (23) detects that the valve body (1) has a gas micro-leakage, the control component is used to control the second magnetic component to move to a first position in the valve body (1), and the first magnetic component drives the mobile component to move under the action of magnetic attraction to close the air inlet of the valve body (1).

2. Gas self-closing valve according to claim 1, characterized in that When the mobile component opens the air inlet of the valve body (1), the control component controls the second magnetic component to keep at the second position in the valve body (1), and the first position and the second position are two different positions in the valve body (1).

3. Gas self-closing valve according to claim 1, characterized in that The control component includes: A control component (26) located in the valve body (1), the information input end of which is connected with the micro-leakage sensor (23); An action component (3) connected with the second magnetic component and controlled by the control component (26). When the action component (3) is engaged with the second magnetic assembly, the action component (3) limits the second magnetic assembly to remain at the second position in the valve body (1), and when the action component (3) is not engaged with the second magnetic assembly, the second magnetic assembly is moved from the second position to the first position.

4. The gas shut off valve of claim 1, wherein, The moving assembly comprises: An overflow column (15) is slidingly arranged in the air inlet channel of the valve body (1), one end of which abuts against the side wall of the limiting rod (10); An overflow plate (13) is fixedly connected to the side wall of the overflow column (15), and the overflow column (15) penetrates through the overflow plate (13); An overflow spring (14) is arranged in the air inlet channel, one end of which is connected to the valve body (1), and the other end abuts against the overflow plate (13), for driving the overflow plate (13) to open the air inlet of the valve body (1); When the end of the overflow column (15) is located at the bottom surface of the trapezoidal groove (12), the overflow plate (13) opens the valve body (1); when the end of the overflow column (15) is located on the side wall of the limiting rod (10) and not in the trapezoidal groove (12), the overflow plate (13) closes the valve body (1).

5. Gas self-closing valve according to claim 4, characterized in that The end of the overflow column (15) is in a semispherical shape.

6. The gas self-closing valve according to claim 1, wherein The manual unlocking assembly comprises a reset knob (16), a reset rotating shaft (17), a split pin (18), a reset lever (19), and a reset spring (20); the reset knob (16) is rotationally arranged on the valve body (1); the reset rotating shaft (17) rotates with the rotation of the reset knob (16); the reset lever (19) is arranged on the side wall of the reset rotating shaft (17) and rotates with the rotation of the reset rotating shaft (17), and the reset lever (19) is used to press the second magnetic assembly, thereby increasing the distance between the first magnetic assembly and the second magnetic assembly; the reset spring (20) is arranged on the reset rotating shaft (17) and is used to reset the reset knob (16).

7. Gas self-closing valve according to claim 6, characterized in that The reset lever (19) is fixed to the reset rotating shaft (17) by the split pin (18).

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