Electromagnetic valve and gas device

Abstract

The utility model relates to the technical field of gas switches, and discloses an electromagnetic valve and a gas device. The electromagnetic valve comprises a valve shell, a magnet, a movable shaft, a pull rod, a sealing cap, an elastic piece and a coil. After the electromagnetic valve is assembled, the pull rod and the movable shaft are connected together, the pull rod can drive the movable shaft to be far away from the magnet when the pull rod is pressed downwards, and the movable shaft drives the sealing cap to move close to the gas channel, so that the gas channel is closed; when the pull rod is lifted, the pull rod drives the moving shaft to approach the moving magnet until the magnet adsorbs the moving shaft and the sealing cap is far away from the gas channel, so that the gas channel is closed. By means of the arrangement, the manual control fuel gas channel on-off process of the electromagnetic valve is the same as the conventional cognition of a user, and misoperation of the user is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas switches, in particular to a solenoid valve and a gas device. Background Art

[0002] A solenoid valve is an electronically controlled component that uses the electromagnetic force generated by an electromagnetic coil to drive the valve stem to open or close the valve. It is widely used in various scenarios that require fluid on-off control, such as gas supply and natural gas transportation, to achieve pipeline channel control. However, in some cases, in order to meet specific safety requirements or respond to emergencies, a manual control function needs to be designed for the solenoid valve.

[0003] like Figure 1 As shown, a solenoid valve with manual control function is mainly provided with a pull rod 2 and a moving magnet 3 on the valve body 1, and the moving magnet 3 is fixed at one end of the pull rod 2; when the pull rod 2 is pressed down, the pull rod 2 drives the moving magnet 3 to approach the moving shaft 4, and the moving shaft 4 drives the sealing cap 5 at the other end to move downward under the magnetic attraction force of the moving magnet 3, and the sealing cap 5 overcomes the elastic force of the return spring 6 and moves away from the gas channel to realize the opening of the gas channel; when the pull rod 2 is lifted, the pull rod 2 drives the moving magnet 3 away from the moving shaft 4, and the magnetic attraction force of the moving magnet on the moving shaft 4 is weakened, and the sealing cap 5 approaches the gas channel under the elastic force of the return spring 6 to realize the closing of the gas channel. The manual control opening and closing operation process of the solenoid valve is opposite to the conventional operation of pressing down to close the valve and lifting up to open the valve, which brings trouble to users and easily causes the phenomenon of misoperation. Utility Model Content

[0004] The first technical problem solved by the utility model is to provide a solenoid valve, which effectively solves the problem that the opening and closing process of the existing solenoid valve is contrary to the conventional cognition of users.

[0005] The second technical problem solved by the utility model is to provide a gas device, the technical effect of which is brought by the solenoid valve and is the same as the technical effect of the solenoid valve, so it will not be repeated.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A solenoid valve comprises a valve housing, a magnet, a moving shaft, a pull rod, a sealing cap, an elastic member and a coil, wherein the magnet is fixed on the valve housing and is used to adsorb the moving shaft; the moving shaft is movably connected to the valve housing along its own axial direction; the pull rod passes through the magnet and one end is fixedly connected to the moving shaft; the sealing cap is connected to the end of the moving shaft facing away from the pull rod; the elastic member is elastically arranged between the valve housing and the sealing cap; the coil is arranged in the valve housing and is located on the outer periphery of the moving shaft; when energized, the coil drives the moving shaft and the sealing cap to move away from the magnet along the axial direction of the moving shaft.

[0008] Compared with the background technology, the electromagnetic valve described in the utility model has the following beneficial effects: after the valve housing, magnet, moving shaft, pull rod, sealing cap, elastic part and coil are assembled, by connecting the pull rod and the moving shaft together, when the pull rod is pressed down, the pull rod drives the moving shaft away from the magnet, and the moving shaft drives the sealing cap to move closer to the gas channel, so as to close the gas channel; when the pull rod is lifted, the pull rod drives the moving shaft to move closer to the moving magnet until the magnet absorbs the moving shaft and the sealing cap moves away from the gas channel, so as to close the gas channel. With such a setting, the manual control process of the electromagnetic valve to open and close the gas channel is the same as the user's common cognition, thus avoiding user misoperation.

[0009] In one embodiment, the solenoid valve further includes a feedback member, which is disposed on the valve housing and is configured to contact the moving shaft to form a feedback loop.

[0010] In one embodiment, the feedback member has a detection end, the detection end is located between the magnet and the moving shaft, and the detection end is spaced apart from the magnet. The detection end is used to contact the moving shaft under the adsorption of the magnet to form a feedback loop.

[0011] In one embodiment, the solenoid valve further includes an insulating member, and the insulating member is disposed between the detection end and the magnet. One end of the pull rod passes through the magnet and the insulating member and is then connected to the moving shaft.

[0012] In one embodiment, the magnet is a ferrite magnet. Compared with the NdFeB magnet with a strong magnetic field used in traditional solenoid valves, the ferrite magnet has a lower cost, which is helpful to reduce the overall cost of the solenoid valve.

[0013] In one of the embodiments, a pull rod cap is fixed to the other end of the pull rod extending out of the valve housing.

[0014] In one of the embodiments, a coil bracket is further provided in the valve housing, the valve housing includes an outer shell, and the coil is located in a space enclosed by the coil bracket and the outer shell.

[0015] In one embodiment, the solenoid valve further includes a sleeve, which includes a sleeve extension and a sleeve body, the sleeve body is located in the coil bracket and is sleeved on the outer periphery of the moving shaft, and the sleeve extension is fixed on the lower end surface of the valve housing facing the sealing cap.

[0016] In one of the embodiments, an annular groove is coaxially arranged on the outer wall of the moving shaft, and a sealing member is arranged in the annular groove.

[0017] The above second technical problem is solved by the following technical solution:

[0018] A gas device comprises a gas channel and a solenoid valve arranged on the gas channel for controlling the opening or closing of the gas channel.

[0019] Compared with the background technology, the gas device of the utility model has the beneficial effect of avoiding wrong operation of the user by using the solenoid valve which is consistent with the conventional cognition of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the specific implementation methods of the present utility model, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a cross-sectional view of a solenoid valve in the prior art blocking a gas passage;

[0022] Figure 2 It is a cross-sectional view of the solenoid valve of the embodiment of the utility model when blocking the gas passage;

[0023] Figure 3 This is a cross-sectional view of the solenoid valve of the embodiment of the utility model when opening the gas passage;

[0024] Figure 4 This is an exploded view of the solenoid valve of the embodiment of the utility model;

[0025] Description of reference numerals:

[0026] 11. Valve housing; 111. Outer shell; 112. First installation chamber; 113. First limiting protrusion; 114. Wire hole; 115. End cover; 12. Magnet; 13. Moving shaft; 14. Pull rod; 15. Sealing cap; 16. Elastic member; 17 Coil; 18. Feedback member; 181. Fixed end; 182. Feedback end; 19. Insulating member; 21. Pull rod cap; 22. Coil bracket; 221. Bracket body; 222. Second limiting protrusion; 223. Installation groove; 224. Third limiting protrusion; 23. Sleeve; 231. Sleeve extension; 232. Sleeve body; 24. Sealing member. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] See also Figures 1 to 4 , Figure 1A cross-sectional view of a solenoid valve in the prior art blocking a gas passage is shown; Figure 2 A cross-sectional view of the solenoid valve provided in an embodiment of the present application blocking a gas passage is shown; Figure 3 A cross-sectional view of the solenoid valve provided in an embodiment of the present application when opening a gas passage is shown; Figure 4 An exploded view of the entire solenoid valve provided in an embodiment of the present application is shown.

[0032] Combine the following Figures 2 to 4 , describing an embodiment of the utility model.

[0033] First, as Figures 2 to 4 As shown, the solenoid valve includes a valve housing 11, a magnet 12, a coil 17, a moving shaft 13, a pull rod 14, a sealing cap 15, and an elastic member 16. The valve housing 11 includes an outer shell 111 and an end cover 115. The outer shell 111 is the main structure of the valve housing 11. The end of the outer shell 111 close to the gas channel is open, and the end cover 115 is installed at the open position.

[0034] The magnet 12 is fixedly mounted on the valve housing 11. If the magnet 12 is fixedly mounted on the end of the outer shell 111 away from the gas passage, the magnet 12 is used to adsorb the movable shaft 13; the movable shaft 13 is movably connected to the valve housing 11 along its own axial direction; the pull rod 14 passes through the magnet 12 and one end is fixedly connected to the movable shaft 13; the sealing cap 15 is connected to the end of the movable shaft 13 facing away from the pull rod 14; the elastic member 16 is elastically arranged between the valve housing 11 and the sealing cap 15; the coil 17 is arranged in the valve housing 11 and is located on the outer periphery of the movable shaft 13; the coil 17 drives the movable shaft 13 and the sealing cap 15 to move away from the magnet 12 along the axial direction of the movable shaft 13 when energized.

[0035] With such a configuration, after the valve housing 11, magnet 12, movable shaft 13, tie rod 14, sealing cap 15, elastic member 16 and coil 17 are assembled, since tie rod 14 and movable shaft 13 are directly connected together, when tie rod 14 is pressed down, tie rod 14 drives movable shaft 13 away from magnet 12, and movable shaft 13 drives sealing cap 15 to move closer to gas channel, thus closing the gas channel; when tie rod 14 is lifted, tie rod 14 drives movable shaft 13 closer to movable magnet 12, until magnet 12 attracts movable shaft 13, and sealing cap 15 moves away from gas channel, thus closing the gas channel. With such a configuration, the on-off process of manually controlling the gas channel of the solenoid valve is the same as the user's common perception, thus avoiding user misoperation.

[0036] Specifically, a first installation chamber 112 is opened at the end of the shell 111 near the pull rod cap 21, and a first limiting protrusion 113 is provided on the side wall of the first installation chamber 112. The first limiting protrusion 113 extends in a direction close to the center axis. The magnet 12 is installed in the first installation chamber 112, and the magnet 12 abuts against the first limiting protrusion 113 axially along the center axis of the valve shell 11.

[0037] It can be explained that when the sealing cap 15 is in a state of closing the passage, the magnetic attraction force between the magnet 12 and the moving shaft 13 is smaller than the elastic force of the elastic member 16, ensuring that the sealing cap 15 can more reliably block the gas passage.

[0038] Similarly, the magnet 12 is specifically a ferrite magnet. Compared with the neodymium iron boron magnet used in traditional solenoid valves, the ferrite magnet has a lower cost, which is conducive to reducing the overall cost of the solenoid valve. At the same time, the magnetism of the ferrite magnet is relatively weak, which can reduce the magnetic attraction exerted by the magnet 12 on the moving shaft 13, making it easier for the elastic member 16 to reliably abut the sealing cap 15 against the gas channel. Preferably, the elastic member 16 is a spring.

[0039] like Figures 2 to 3 As shown, the solenoid valve further includes an insulating member 19 , which is disposed between the magnet 12 and the moving shaft 13 , and one end of the pull rod 14 passes through the magnet 12 and the insulating member 19 and is then connected to the moving shaft 13 .

[0040] Still Figures 2 to 4 As shown, a tie rod cap 21 is fixed to the other end of the tie rod 14 extending out of the valve housing 11 .

[0041] like Figure 2 and Figure 3 As shown, a coil support 22 is further provided in the valve housing 11, the valve housing 11 includes an outer shell 111, and the coil 17 is located in a space enclosed by the coil support 22 and the outer shell 111. The valve housing 11, the coil 17 and the coil support 22 can be integrally plastic-encapsulated to form a coil assembly.

[0042] Specifically, the coil support 22 includes a support body 221 and a second limiting protrusion 222 , one end of the second limiting protrusion 222 is connected to the support body 221 , and the other end is connected to the inner wall surface of the housing 111 in a limiting manner, such as plugging.

[0043] Furthermore, the coil bracket 22 also includes a third limiting protrusion 224, which is connected to the bracket body 221, and the third limiting protrusion 224 and the second limiting protrusion 222 are arranged axially at intervals along the central axis of the valve body and valve shell 11. The bracket body 221, the second limiting protrusion 222, the third limiting protrusion 224 and the inner wall of the outer shell 111 enclose a second installation chamber, and the first limiting protrusion 113 separates the first installation chamber 112 and the second installation chamber in the axial direction of the central axis of the valve body and valve shell 11. The second installation chamber is an annular chamber, and the coil 17 is installed in the second installation chamber.

[0044] Furthermore, the valve housing 11 is also provided with a wire hole 114 for leading out the wires inside the valve housing 11 .

[0045] It can be explained that the housing 111 can be made in one piece by using a plastic sealing process; or it can be made of a split structure, that is, a plurality of sub-components are disassembled and fixed.

[0046] like Figure 2 and Figure 3 As shown, the solenoid valve also includes a feedback member 18, and the feedback member 18, the moving shaft 13 and the control main board of the solenoid valve constitute a feedback loop. Specifically, the feedback member 18 is arranged on the valve housing 11, and the feedback member 18 is used to contact the moving shaft 13; when the sealing cap 15 closes the channel, the feedback member 18 is not in contact with the moving shaft 13, the feedback loop is disconnected and indicates that the channel is in a closed state; when the sealing cap 15 is in a state of opening the channel, the feedback member 18 is in contact with the moving shaft 13, the feedback loop is closed and indicates that the channel is in an open state.

[0047] Specifically, the coil bracket 22 is provided with a mounting groove 223, and the mounting groove 223 is located on the end surface of the second limiting protrusion 222 facing the magnet 12. The feedback member 18 includes at least a fixed end 181 and a detection end. The fixed end 181 is installed in the mounting groove 223, and the fixed end 181 is used to be electrically connected to the detection circuit. The detection end is located between the magnet 12 and the moving shaft 13, and the detection end is spaced apart from the magnet 12. Specifically, one end of the detection end is connected to the fixed end 181, and the other end of the detection end extends outside the mounting groove 223, and the other end of the contact end extends in a direction close to the central axis of the valve body and valve housing 11, and is used to contact the moving shaft 13 under the adsorption action of the magnet 12 to form a feedback loop.

[0048] It can be explained that there is no specific limitation on the number of feedback elements 18 .

[0049] As one of the embodiments, two feedback members 18 are provided, and the two feedback members 18 are arranged at intervals. When the contact ends of the two feedback members 18 are in contact with the moving shaft 13, the feedback loop is closed and indicates that the gas channel is open; when at least one of the contact ends of the two feedback members 18 is separated from the magnet 12, the feedback loop is disconnected and indicates that the channel is in a closed state.

[0050] Furthermore, a detection circuit for detecting the working state of the solenoid valve is provided on the control mainboard of the solenoid valve. Specifically, when the contact end contacts the movable shaft 13, the detection circuit feeds back a conduction signal to the control mainboard, and after receiving the circuit conduction signal, the control mainboard feeds back that the solenoid valve is in the conduction state, and when the control mainboard does not receive the circuit conduction signal, the solenoid valve is fed back in the closed state.

[0051] like Figures 2 to 4As shown, the solenoid valve also includes a sleeve 23, which includes a sleeve extension 231 and a sleeve body 232. The sleeve body 232 is located in the coil bracket 22 and is sleeved on the outer periphery of the moving shaft 13. The sleeve extension 231 is fixed on the lower end surface of the valve housing 11 facing the sealing cap 15.

[0052] Specifically, the sleeve extension portion 231 is arched relative to the sleeve 23 body toward the side close to the sealing cap 15 to form a clamping portion for sleeve-engaging the deformed end of the elastic member 16; the sleeve body portion 232 is arched relative to the sleeve 23 body toward the side away from the sealing cap 15 until it abuts against the feedback end 182, and forms an active chamber inside the sleeve 23 body, and the movable shaft 13 moves within the active chamber.

[0053] Furthermore, the end surface of the sealing cap 15 close to the valve housing 11 is provided with another clamping portion for sleeve connection of the other end of the elastic member 16 .

[0054] It can be explained that in order to ensure the sealing performance of the chamber where the moving shaft 13 is located when it moves, a sealing member 24 is added. Specifically, the sealing member 24 is a sealing ring, and the outer wall of the moving shaft 13 is coaxially provided with an annular groove, and the sealing member 24 is installed in the annular groove.

[0055] The above-mentioned solenoid valve has an electric control operation mode and a manual operation mode.

[0056] In the manual operation mode, when the pull rod 14 is lifted, the pull rod 14 drives the movable shaft 13 to approach the magnet 12, and the movable shaft 13 drives the sealing cap 15 to move upward under the magnetic attraction of the magnet 12, and the sealing cap 15 overcomes the elastic force of the elastic part 16 to open the channel; when the pull rod 14 is pressed down, the pull rod 14 drives the movable shaft 13 away from the magnet 12, and the sealing cap 15 moves downward with the movable shaft 13, and the sealing cap 15 overcomes the elastic force of the elastic part 16 to close the channel.

[0057] In the electric control operation mode, there are two types according to whether the current direction changes. One type uses alternating current, that is, provides alternating current to the coil 17. When powered on, the coil 17 drives the movable shaft 13 and the sealing cap 15 to reciprocate along the axis direction of the movable shaft 13 to realize the opening or closing of the gas channel. When meeting specific safety requirements or responding to emergencies, the solenoid valve is completely opened or closed in manual operation mode; the other type uses direct current and is also used in conjunction with the manual operation mode. Specifically, when the gas channel needs to be closed, the coil 17 is powered, and the coil 17 drives the movable shaft 13 and the sealing cap 15 to approach the gas channel along the axis direction of the movable shaft 13 until the gas channel is completely blocked. When the gas channel needs to be opened, the pull rod 14 is manually lifted. Driven by the pull rod 14, the movable shaft 13 approaches the magnet 12. Under the action of the magnet 12, the movable shaft 13 drives the sealing cap 15 away from the gas channel until the gas channel is completely opened. When meeting specific safety requirements or responding to emergencies, the solenoid valve is completely opened or closed in manual operation mode.

[0058] Preferably, the pull rod cap 21 moves away from the valve body under the action of external force, and drives the pull rod 14, the moving shaft 13 and the sealing cap 15 away from the gas passage until the gas passage is completely opened, and the elastic part 16 is in a compressed state; the magnetic field force generated by the coil 17 structure when energized is used to reduce the magnetic field force generated by the magnet 12, and the elastic part 16 gradually returns to a naturally stretched state until the sealing cap 15 completely closes the gas passage.

[0059] In a second aspect, the utility model further provides a gas device, comprising a gas channel and the above-mentioned solenoid valve arranged on the gas channel and used to control the opening or closing of the gas channel.

[0060] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A solenoid valve, characterized in that: The invention comprises a valve housing (11), a magnet (12), a movable shaft (13), a pull rod (14), a sealing cap (15), an elastic member (16) and a coil (17), wherein the magnet (12) is fixed on the valve housing (11), and the magnet (12) is used to absorb the movable shaft (13); the movable shaft (13) is movably connected to the valve housing (11) along its own axial direction; the pull rod (14) passes through the magnet (12) and one end of the pull rod is fixedly connected to the movable shaft (13); The sealing cap (15) is connected to one end of the movable shaft (13) facing away from the pull rod (14); the elastic member (16) is elastically arranged between the valve housing (11) and the sealing cap (15); the coil (17) is arranged in the valve housing (11) and is located on the outer periphery of the movable shaft (13); when the coil (17) is energized, it drives the movable shaft (13) and the sealing cap (15) to move along the axial direction of the movable shaft (13) away from the magnet (12).

2. The solenoid valve according to claim 1, characterized in that: The solenoid valve further comprises a feedback member (18), wherein the feedback member (18) is arranged on the valve housing (11) and is used for contacting the moving shaft (13) to form a feedback loop.

3. The solenoid valve according to claim 2, characterized in that: The feedback member (18) has a detection end, the detection end is located between the magnet (12) and the moving shaft (13), and the detection end is spaced apart from the magnet (12). The detection end is used to contact the moving shaft (13) under the adsorption action of the magnet (12) to form a feedback loop.

4. The solenoid valve according to claim 3, characterized in that: It also includes an insulating member (19), which is arranged between the detection end and the magnet (12); one end of the pull rod (14) passes through the magnet (12) and the insulating member (19) and is then connected to the moving shaft (13).

5. The solenoid valve according to claim 1, characterized in that: The magnet (12) is a ferrite magnet (12).

6. The solenoid valve according to claim 1, characterized in that: A pull rod cap (21) is fixed to the other end of the pull rod (14) extending out of the valve housing (11).

7. The solenoid valve according to claim 1, characterized in that: A coil support (22) is also provided in the valve housing (11); the valve housing (11) comprises an outer shell (111); and the coil (17) is located in a space enclosed by the coil support (22) and the outer shell (111).

8. The solenoid valve according to claim 7, characterized in that: It also includes a sleeve (23), the sleeve (23) including a sleeve extension portion (231) and a sleeve body portion (232), the sleeve body portion (232) is located in the coil support (22) and is sleeved on the outer periphery of the movable shaft (13), and the sleeve extension portion (231) is fixed on the lower end surface of the valve housing (11) on the side facing the sealing cap (15).

9. The solenoid valve according to claim 1, characterized in that: An annular groove is coaxially arranged on the outer wall of the moving shaft (13), and a sealing member (24) is arranged in the annular groove.

10. A gas device, characterized in that: It comprises a gas channel and a solenoid valve as described in any one of claims 1 to 9, which is arranged on the gas channel and is used to control the opening or closing of the gas channel.

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