Self-closing valve with gas leakage alarm cut-off function

Abstract

The application discloses a self-closing valve with gas leakage alarm and cut-off functions, and aims to provide a self-closing valve with gas leakage alarm and cut-off functions, which is easy to use and high in safety. The self-closing valve comprises a valve body and an electromagnetic valve arranged on the valve body, the valve body is provided with a gas film, a first air inlet, a sealing assembly, a handle assembly and a reset fixing plate, the electromagnetic valve is provided with a first magnet, an electromagnetic coil, a magnetic conducting plate and a magnetic conducting block, the magnetic conducting block is magnetically attracted to the upper end of the handle assembly, the lower end of the handle assembly is magnetically attracted to a movable assembly, the lower end of the handle assembly is sleeved with a first reset spring, the lower end of the movable assembly is arranged on the gas film, the lower end of the gas film is provided with an inclined driving rod which is magnetically attracted to the movable assembly, the reset fixing plate is magnetically attracted to the top of the inclined driving rod, and the inclined part of the inclined driving rod drives the sealing assembly to open / close the first air inlet. The application is applied to the technical field of gas valves.

Description

TECHNICAL FIELD

[0001] The present application relates to a self-closing valve, in particular to a self-closing valve with gas leakage alarm and cut-off function. BACKGROUND

[0002] As a clean energy with low consumption, high benefit, low pollution and high efficiency, gas has been widely used in people's daily production and life. In order to ensure the safe use of gas, a gas self-closing valve needs to be installed on the gas pipeline, which can automatically cut off the gas supply when the pipeline gas pressure is under pressure, overpressure or abnormal flow. However, when the gas pipeline leaks and the leakage is not enough to close the self-closing valve, there is an explosion hazard, and another gas leakage alarm and cut-off valve needs to be installed in the pipeline. Two valves need to be installed independently, which occupies a large space and has high cost, and is not easy to promote. Therefore, it is necessary to develop a self-closing valve with gas leakage alarm and cut-off function which is easy to use and high in safety. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a self-closing valve with gas leakage alarm and cut-off function which is easy to use and high in safety.

[0004] The technical scheme adopted by the present application is: the present application comprises a valve body and an electromagnetic valve arranged in cooperation with the valve body, the valve body is provided with a handle assembly, a gas film, a first air inlet, a sealing assembly and a reset fixing plate, the electromagnetic valve is provided with a first magnet, an electromagnetic coil, a magnetic conducting plate and a magnetic conducting block, the magnetic conducting plate is configured to conduct the magnetism of the first magnet to the magnetic conducting block, the upper end of the handle assembly extends out of the valve body into the electromagnetic valve, the lower end of the magnetic conducting block is magnetically attracted to the upper end of the handle assembly, the lower end of the handle assembly is magnetically attracted to a movable assembly, the lower end of the handle assembly is sleeved with a first reset spring, the lower end of the movable assembly is arranged on the gas film, the first magnet cooperates with the handle assembly, the lower end of the gas film is provided with an inclined driving rod which is magnetically attracted to the movable assembly, the reset fixing plate is magnetically attracted to the top of the inclined driving rod, the inclined part of the inclined driving rod drives the sealing assembly to open / close the first air inlet, the magnetic attraction force between the upper end of the inclined driving rod and the lower end of the movable assembly is greater than the magnetic attraction force between the upper end of the movable assembly and the lower end of the handle assembly, and the magnetic attraction force between the upper end of the movable assembly and the lower end of the handle assembly is greater than the magnetic attraction force between the upper end of the inclined driving rod and the reset fixing plate.

[0005] Further, the self-closing valve with gas leakage alarm and cut-off function further comprises a gas leakage detection device and a control module, and the gas leakage detection device and the electromagnetic valve are electrically connected with the control module.

[0006] Further, the self-closing valve with gas leakage alarm cut-off function further comprises an alarm device connected with the control module.

[0007] Further, a protective cover is threadedly connected to the electromagnetic valve, and the upper end of the handle assembly is located in the protective cover.

[0008] Further, one end of the valve body is provided with a flow limiting valve communicated with the first air inlet, the flow limiting valve is provided with a flow limiting ring assembly, a movable plate and a cover plate, the movable plate is cooperatively arranged on the inner side of the cover plate, the flow limiting ring assembly is adapted to the movable plate, a plurality of second air inlets are formed in the cover plate, and a second return spring is cooperatively arranged between the flow limiting ring assembly and the movable plate.

[0009] Further, the tilt driving rod comprises a vertical rod and a tilt rod connected with the lower end of the vertical rod, the lower end of the vertical rod is provided with a guide column, the tilt rod is cooperatively arranged in the sealing assembly and drives the sealing assembly to move, the guide column is located below the reset fixed plate and cooperates with the reset fixed plate, the reset fixed plate is provided with a guide hole, and the reset fixed plate is sleeved on the outer wall of the vertical rod through the guide hole.

[0010] Further, the valve body is provided with an observation window, and the outer portion of the movable assembly is sequentially provided from top to bottom with a closed state display part, a normal state display part and an overpressure state display part which all cooperate with the observation window.

[0011] Further, the bottom of the handle assembly is provided with a first magnetic conductive part, the upper end of the movable assembly is provided with a second magnet magnetically attracted to the first magnetic conductive part, the lower end of the movable assembly is provided with a second magnetic conductive part, the top of the tilt driving rod is provided with a third magnet magnetically attracted to the second magnetic conductive part, the reset fixed plate is a magnetic conductive part, and the third magnet is magnetically attracted to the reset fixed plate.

[0012] Further, the sealing assembly is rotatably provided with a first roller and a second roller, and the tilt rod is cooperatively arranged between the first roller and the second roller.

[0013] Further, the electromagnetic valve is connected to the valve body through a plurality of connecting screws.

[0014] The beneficial effects of this invention are as follows: Compared with the shortcomings of the prior art, in this invention, during use, pulling up the handle assembly causes the lower end of the handle assembly to drive the movable assembly upward a certain distance and then disengage from the movable assembly. The lower end of the handle assembly overcomes the elastic force of the first return spring and moves upward until the upper end of the handle assembly magnetically attracts the magnetic block. During this process, because the magnetic attraction between the reset fixing plate and the tilting drive rod is minimal, the tilting drive rod disengages from the reset fixing plate, allowing the tilting drive rod to move upward with the movable assembly and the gas film, thereby opening the first air inlet and allowing gas to enter the valve body. Further gas pressure allows the gas film to maintain an upward bulging state, ensuring normal gas flow. The handle assembly continues to be pulled upward, further disengaging the handle assembly from the movable assembly. When the gas pressure is abnormal and too high, the valve body gradually becomes a high-pressure state due to continuous internal air intake. The gas continues to push the gas film upward, further causing the tilting drive rod to... The gas film detaches from the valve body and is reset by the magnetic attraction of the reset fixing plate, causing the inclined portion of the tilting drive rod to drive the sealing assembly to close the first air inlet. Furthermore, after the first air inlet is closed, the gas film and the movable assembly continue to move downwards and reset. When the gas pressure is insufficient, the valve body is in a low-pressure state, and the gas film and the tilting drive rod are directly reset by the magnetic attraction of the reset fixing plate, thereby closing the first air inlet. Therefore, the arrangement of the gas film, the first air inlet, the sealed assembly, the valve body, and the movable assembly allows the invention to automatically open / close according to the state inside the valve body. In addition, when active valve closure is required, the solenoid valve can be energized, and the electromagnetic coil in the solenoid valve generates a reverse magnetic force, causing the magnetic block to no longer magnetically attract the handle assembly. The handle assembly moves downwards due to the elastic force of the first reset spring, further causing the movable assembly, the gas film, and the tilting drive rod to move downwards, thereby closing the first air inlet. This makes the invention easy to use and highly safe. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 yes Figure 2 A magnified view of part A;

[0018] Figure 4 yes Figure 2 A magnified view of part B;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the movable board;

[0020] Figure 6 This is a three-dimensional structural diagram of the sealing assembly. Detailed Implementation

[0021] like Figures 1 to 6As shown, in this embodiment, the present invention includes a valve body 1 and a solenoid valve 3 fitted on the valve body 1. The valve body 1 is provided with a handle assembly 2, an air diaphragm 4, a first air inlet 5, a sealing assembly 6, and a reset fixing plate 23. The solenoid valve 3 is provided with a first magnet 7, an electromagnetic coil j, a magnetic guide plate k, and a magnetic guide block h. The magnetic guide plate k is configured to conduct the magnetism of the first magnet 7 to the magnetic guide block h. The upper end of the handle assembly 2 extends from the valve body 1 into the solenoid valve 3. The lower end of the magnetic guide block h is magnetically attracted to the upper end of the handle assembly 2, specifically, the lower end of the magnetic guide block h is magnetically attracted to the top of the cylinder L in the handle assembly 2. The cylinder L in the handle assembly 2 is an iron component. The lower end of the handle assembly 2 is magnetically attracted to a movable component 8. The lower end of the handle assembly 2 is sleeved with a first reset spring 9. The lower end of the movable component 8 is located in the air diaphragm 4. On the membrane 4, the first magnet 7 cooperates with the handle assembly 2. The lower end of the air membrane 4 is provided with an inclined drive rod 10 that is magnetically attracted to the movable assembly 8. The reset fixing plate 23 is magnetically attracted to the top of the inclined drive rod 10. The inclined part of the inclined drive rod 10 drives the sealing assembly 6 to open / close the first air inlet 5. The magnetic attraction between the upper end of the inclined drive rod 10 and the lower end of the movable assembly 8 is greater than the magnetic attraction between the upper end of the movable assembly 8 and the lower end of the handle assembly 2. The magnetic attraction between the upper end of the movable assembly 8 and the lower end of the handle assembly 2 is greater than the magnetic attraction between the upper end of the inclined drive rod 10 and the reset fixing plate 23. The magnetic attraction between the lower end of the magnetic guide block h and the upper end of the handle assembly 2 is greater than the reset force of the first reset spring 9, which enables the handle assembly 2 to be attracted by the magnetic guide block h and not fall off.In contrast to the shortcomings of existing technologies, in this invention, during use, pulling up the handle assembly 2 causes the lower end of the handle assembly 2 to move the movable component 8 upward a certain distance before disengaging from it. The lower end of the handle assembly 2 then overcomes the elastic force of the first return spring 9 and moves upward until the upper end of the handle assembly 2 is magnetically attracted to the magnetic block h. During this process, because the magnetic attraction between the reset fixing plate 23 and the tilting drive rod 10 is minimal, the tilting drive rod 10 disengages from the reset fixing plate 23, allowing the tilting drive rod 10 to engage with the movable component h. Component 8 and the gas film 4 move upward, thereby opening the first air inlet 5 and allowing gas to enter the valve body 1. Further gas pressure allows the gas film 4 to maintain an upward-bulging state, ensuring normal gas flow. The handle assembly 2 continues to be pulled upward, further disengaging it from the movable component 8. When the gas pressure becomes abnormal or excessively high, the valve body 1 gradually becomes a high-pressure state due to continuous internal air intake. The gas continues to bulge the gas film 4 upward, further causing the tilting drive rod 10 to detach from the gas film 4 due to excessive pressure. The gas membrane 4 and the movable component 8 will continue to move downwards and reset due to the magnetic attraction of the reset fixing plate 23. When the gas pressure is insufficient, the valve body 1 is in a low-pressure state. The gas membrane 4 and the tilting drive rod 10 will directly reset due to the magnetic attraction of the reset fixing plate 23, thereby closing the first air inlet 5. Therefore, through the gas membrane 4, the first air inlet 5, the sealed component 6, the valve body 1, and the... The arrangement of the movable component 8 enables the present invention to automatically open / close according to the internal state of the valve body 1. In addition, when it is necessary to actively close the valve, the solenoid valve 3 can be energized, and the solenoid coil j in the solenoid valve 3 generates a reverse magnetic force, so that the magnetic block h no longer magnetically attracts the handle assembly 2, and the handle assembly 2 moves downward due to the elastic force of the first return spring 9, which further causes the movable component 8, the air film 4 and the tilting drive rod 10 to move downward, thereby closing the first air inlet 5. This makes the present invention easy to use and highly safe.

[0022] In this embodiment, the self-closing valve with gas leak alarm and shut-off function further includes a gas leak detection device 90 and a control module. The gas leak detection device 90 and the solenoid valve 3 are both electrically connected to the control module. When the gas leak detection device 90 detects a gas leak, the control module controls the solenoid valve 3 to be energized. The electromagnetic coil j in the solenoid valve 3 generates a reverse magnetic force, causing the magnetic block h to no longer magnetically attract the handle assembly 2. The handle assembly 2 moves downward due to the elastic force of the first return spring 9, further causing the movable component 8, the gas film 4, and the tilting drive rod 10 to move downward, thereby closing the first air inlet 5. This allows the present invention to automatically close the valve after detecting a gas leak.

[0023] In this embodiment, the self-closing valve with gas leak alarm and shut-off function further includes an alarm device connected to the control module. When the gas leak detection device 90 detects a gas leak, the control module will control the alarm device to sound an alarm.

[0024] In this embodiment, a protective cover 11 is threaded onto the solenoid valve 3, and the upper end of the handle assembly 2 is located in the protective cover 11.

[0025] In this embodiment, a flow limiting valve 12 connected to the first air inlet 5 is provided at one end of the valve body 1. The flow limiting valve 12 is provided with a flow limiting ring assembly 13, a movable plate 14 and a cover plate 141. The movable plate 14 is fitted inside the cover plate 141. The flow limiting ring assembly 13 is adapted to the movable plate 14. A plurality of second air inlets 15 are opened on the cover plate 141. A second return spring 16 is fitted between the flow limiting ring assembly 13 and the movable plate 14. When the gas enters the flow-limiting valve 12, it passes through the second air inlet 15 and the first air inlet 5 in sequence before entering the valve body 1. During this process, if the gas flow rate is too high, the gas will push the movable plate 14 towards the flow-limiting ring assembly 13 as it enters the first air inlet 5. This causes the movable plate 14 to seal the flow-limiting ring assembly 13, preventing the gas from entering the first air inlet 5. At the same time, due to insufficient airflow into the inner cavity, the pressure in the inner cavity drops, and the tilting drive rod 10 is magnetically attracted and moves downward, driving the sealing assembly 6 to close the first air inlet 5. When the gas flow rate is appropriate, the second return spring 16 will drive the movable plate 9 to return to its original position, allowing the gas to continue to pass through the second air inlet 15 and the first air inlet 5 in sequence before entering the valve body 1.

[0026] In this embodiment, the tilting drive rod 10 includes a vertical rod 17 and a tilting rod 18 connected to the lower end of the vertical rod 17. A guide post 35 is provided at the lower end of the vertical rod 17. The tilting rod 18 is fitted into the sealing assembly 6 and drives the sealing assembly 6 to move. The guide post 35 is located below the reset fixing plate 23 and cooperates with the reset fixing plate 23. When the tilting drive rod 10 moves upward to a certain distance, the top of the guide post 35 is blocked by the reset fixing plate 23, preventing the tilting drive rod 10 from moving further upward. The reset fixing plate 23 has a guide hole 24, through which it is sleeved onto the outer wall of the vertical rod 17.

[0027] In this embodiment, the valve body 1 is provided with an observation window 30, and the exterior of the movable component 8 is provided with, from top to bottom, a closed state display section 31, a normal state display section 32, and an overpressure state display section 33, all of which cooperate with the observation window 30. The operator can directly observe the observation window 30 to know the pressure state inside the valve body 1.

[0028] In this embodiment, the bottom of the handle assembly 2 is provided with a first magnetic material c, the upper end of the movable assembly 8 is provided with a second magnet d that is magnetically attracted to the first magnetic material c, the lower end of the movable assembly 8 is provided with a second magnetic material e, the top of the tilting drive rod 10 is provided with a third magnet f that is magnetically attracted to the second magnetic material e, the reset fixing plate 23 is a magnetic material, and the third magnet f is magnetically attracted to the reset fixing plate 23.

[0029] In this embodiment, the sealing assembly 6 is rotatably fitted with a first roller 21 and a second roller 22, and the tilting rod 18 is disposed between the first roller 21 and the second roller 22. The engagement of the tilting rod 18 with the first roller 21 and the second roller 22 allows the sealing assembly 6 to move horizontally to open / close the first air inlet 5.

[0030] In this embodiment, the solenoid valve 3 is connected to the valve body 1 by a number of connecting screws 36.

[0031] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.

Claims

1. A self-closing valve with gas leak alarm and shut-off function, characterized in that: It includes a valve body (1) and a solenoid valve (3) fitted on the valve body (1). The valve body (1) is provided with a handle assembly (2), an air film (4), a first air inlet (5), a sealing assembly (6), and a reset fixing plate (23). The solenoid valve (3) is provided with a first magnet (7), an electromagnetic coil (j), a magnetic plate (k), and a magnetic block (h). The magnetic plate (k) is configured to conduct the magnetism of the first magnet (7) to the magnetic block (h). The upper end of the handle assembly (2) extends from the valve body (1) into the solenoid valve (3), and the lower end of the magnetic block (h) The upper end of the handle assembly (2) is magnetically attracted to the handle assembly (2), and the lower end of the handle assembly (2) is magnetically attracted to the movable component (8). The lower end of the handle assembly (2) is sleeved with a first return spring (9). The lower end of the movable component (8) is disposed on the air film (4). The first magnet (7) cooperates with the handle assembly (2). The lower end of the air film (4) is provided with an inclined drive rod (10) that is magnetically attracted to the movable component (8). The reset fixing plate (23) is magnetically attracted to the top of the inclined drive rod (10). The inclined part of the inclined drive rod (10) drives the sealing assembly (6) to open. / Close the first air inlet (5), the magnetic attraction between the upper end of the tilt drive rod (10) and the lower end of the movable component (8) is greater than the magnetic attraction between the upper end of the movable component (8) and the lower end of the handle assembly (2), and the magnetic attraction between the upper end of the movable component (8) and the lower end of the handle assembly (2) is greater than the magnetic attraction between the upper end of the tilt drive rod (10) and the reset fixing plate (23); the self-closing valve with gas leak alarm cut-off function also includes a gas leak detection device (90) and a control module, the gas leak detection device (90) and the solenoid valve (3) All are electrically connected to the control module; one end of the valve body (1) is provided with a flow limiting valve (12) connected to the first air inlet (5). The flow limiting valve (12) is provided with a flow limiting ring assembly (13), a movable plate (14) and a cover plate (141). The movable plate (14) is fitted inside the cover plate (141). The flow limiting ring assembly (13) is adapted to the movable plate (14). The cover plate (141) has several second air inlets (15). A second return spring (16) is fitted between the flow limiting ring assembly (13) and the movable plate (14).

2. The self-closing valve with gas leak alarm and shut-off function according to claim 1, characterized in that: The self-closing valve with gas leak alarm and shut-off function also includes an alarm device, which is connected to the control module.

3. The self-closing valve with gas leak alarm and shut-off function according to claim 1, characterized in that: The solenoid valve (3) is threaded with a protective cover (11), and the upper end of the handle assembly (2) is located in the protective cover (11).

4. The self-closing valve with gas leak alarm and shut-off function according to claim 1, characterized in that: The tilting drive rod (10) includes a vertical rod (17) and an tilting rod (18) connected to the lower end of the vertical rod (17). A guide post (35) is provided at the lower end of the vertical rod (17). The tilting rod (18) is fitted in the sealing assembly (6) and drives the sealing assembly (6) to move. The guide post (35) is located below the reset fixing plate (23) and cooperates with the reset fixing plate (23). A guide hole (24) is opened in the reset fixing plate (23). The reset fixing plate (23) is sleeved on the outer wall of the vertical rod (17) through the guide hole (24).

5. The self-closing valve with gas leak alarm and shut-off function according to claim 1, characterized in that: The valve body (1) is provided with an observation window (30), and the exterior of the movable component (8) is provided with a closed state display section (31), a normal state display section (32) and an overpressure state display section (33) that are all in cooperation with the observation window (30) from top to bottom.

6. The self-closing valve with gas leak alarm and shut-off function according to claim 4, characterized in that: The handle assembly (2) has a first magnetic material (c) at its bottom, the movable assembly (8) has a second magnet (d) that is magnetically attracted to the first magnetic material (c) at its upper end, the movable assembly (8) has a second magnetic material (e) at its lower end, the tilting drive rod (10) has a third magnet (f) that is magnetically attracted to the second magnetic material (e) at its top, the reset fixing plate (23) is a magnetic material, and the third magnet (f) is magnetically attracted to the reset fixing plate (23).

7. The self-closing valve with gas leak alarm and shut-off function according to claim 4, characterized in that: The sealing assembly (6) is rotatably fitted with a first roller (21) and a second roller (22), and the tilting rod (18) is fitted between the first roller (21) and the second roller (22).

8. The self-closing valve with gas leak alarm and shut-off function according to claim 1, characterized in that: The solenoid valve (3) is connected to the valve body (1) by a number of connecting screws (36).

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