Double-diaphragm double-channel electromagnetic valve

Abstract

The utility model discloses a double-diaphragm double-channel electromagnetic valve which comprises a valve body, a first channel and a second channel are arranged on the valve body, the first channel comprises a first left connector and a first right connector, and the second channel comprises a second left connector and a second right connector. The core column can be arranged in the valve body in an up-down moving mode under the action of the electromagnet, a first diaphragm and a second diaphragm are arranged on the core column, the first channel is located below the first diaphragm, and the second channel is located below the second diaphragm; when the core column moves upwards, the first channel is in an open state, and the second channel is in an open state; when the core column moves downwards, the first channel is in a closed state, and the second channel is in a closed state. The two channels are provided with the diaphragms and the sealing gaskets, the movable iron core drives the sealing gaskets to be opened and closed, the diaphragms isolate fluid from the electromagnetic assembly, meanwhile, the two channels are opened and closed at the same time, corrosion resistance is good, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to a solenoid valve, specifically a double-diaphragm double-channel solenoid valve. Background Technology

[0002] Currently, most common solenoid valves are single-channel on / off valves. To achieve synchronous operation of two solenoid valve channels, an external power supply is required, and achieving perfect synchronization is difficult. While some existing dual-channel solenoid valves can achieve synchronous operation, they cannot separate the fluid from the moving iron core, have low corrosion resistance, and limited application range. Therefore, a dual-diaphragm dual-channel solenoid valve was designed to solve the above problems.

[0003] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a double diaphragm double channel solenoid valve.

[0005] To achieve the above and other related objectives, the technical solution provided by this utility model is: a double-diaphragm, double-channel solenoid valve, comprising:

[0006] The valve body has a first channel and a second channel. The first channel includes a first left interface and a first right interface, and the second channel includes a second left interface and a second right interface.

[0007] The core column is movable up and down inside the valve body under the action of an electromagnet. The core column is provided with a first diaphragm and a second diaphragm. The first channel is located below the first diaphragm, and the second channel is located below the second diaphragm.

[0008] When the core column moves upward, the first channel is open and the second channel is open;

[0009] When the core moves downward, the first channel is closed and the second channel is closed.

[0010] Furthermore, the valve body includes a first valve body and a second valve body, which are vertically connected and detachably disposed. The core column includes a first core column and a second core column, which are vertically connected and detachably disposed. The first diaphragm is disposed on the first core column, which is located inside the first valve body. The second diaphragm is disposed on the second core column, which is located inside the second valve body. In this design, both the valve body and the core column are configured as two parts that are detachably connected, facilitating the installation and removal of the diaphragm on the core column and the installation and removal of the core column within the valve body.

[0011] Furthermore, the first core column includes a first upper limit ring and a first lower limit ring coaxially arranged, and a first receiving groove is formed between the first upper limit ring and the first lower limit ring to accommodate the thickness of the first diaphragm. The first diaphragm is sleeved on the body of the first core column through the first receiving groove. The inner edge of the first diaphragm is in vertical contact with the first upper limit ring and the first lower limit ring, and the outer edge of the first diaphragm is limited and disposed in the first valve body.

[0012] The second core column includes a second upper limit ring and a second lower limit ring coaxially arranged. A second receiving groove is formed between the second upper limit ring and the second lower limit ring to accommodate the thickness of the second diaphragm. The second diaphragm is sleeved on the body of the second core column through the second receiving groove. The inner edge of the second diaphragm abuts against the second upper limit ring and the second lower limit ring vertically. The outer edge of the second diaphragm is limited and disposed in the second valve body.

[0013] In this solution, by setting an upper limit ring and a lower limit ring on the core column to lock the diaphragm, the diaphragm can not only play a limiting role, but also move with the diaphragm and is not easily damaged.

[0014] Furthermore, a first annular groove is provided on the body of the first core post, the first annular groove is located below the first lower limit ring, and a first sealing gasket is provided at the first annular groove;

[0015] The first valve body has a first through-hole, and the first core, the first diaphragm and the first sealing gasket are all disposed in the first mounting hole; the first sealing gasket divides the first mounting hole into a first upper cavity and a first lower cavity;

[0016] The first left interface is connected to the first lower cavity, and the first right interface is connected to the first upper cavity.

[0017] Furthermore, a second annular groove is provided on the body of the second core post, the second annular groove is located below the second lower limit ring, a second sealing gasket is sleeved on the lower end of the second core post, and the upper part of the second sealing gasket is inserted into the second annular groove.

[0018] The upper end of the second valve body is provided with a second mounting hole, and the second core, the second diaphragm and the second sealing gasket are all disposed in the second mounting hole; the second sealing gasket divides the second mounting hole into a second upper cavity and a second lower cavity;

[0019] The second left interface is connected to the second lower cavity, and the second right interface is connected to the second upper cavity.

[0020] Furthermore, the lower end of the first core column passes through the first valve body and connects to the second core column inside the second valve body. A sealing ring is fitted onto the lower end of the first core column, and the sealing ring is located below the first channel. A mounting groove is provided inside the first valve body corresponding to the mounting position of the sealing ring, and the sealing ring is engaged in the mounting groove. In this design, the sealing ring can prevent interference between the cavities of the first and second channels; the mounting groove can limit the sealing ring and prevent it from being moved by the first core column when it moves up and down.

[0021] Furthermore, a first annular protrusion is provided below the first sealing gasket, and the first annular protrusion is disposed on the first valve body and located within the first mounting hole; a second annular protrusion is provided below the second sealing gasket, and the second annular protrusion is disposed on the second valve body and located within the second mounting hole. In this design, the annular protrusion is integrally formed with the corresponding valve body. The annular protrusion allows the sealing gasket to undergo a certain deformation when subjected to the downward spring force of the solenoid valve, thereby achieving a better sealing effect.

[0022] Furthermore, the solenoid valve also includes: a movable iron core connected above the core column for driving the core column to move up and down; a fixed iron core located above the movable iron core with a gap between them; a spring connected between the movable iron core and the fixed iron core; a coil sleeved on the movable iron core and the fixed iron core; and a housing sleeved on the coil.

[0023] Furthermore, the upper end of the movable iron core has an upper connecting groove, and the lower end of the movable iron core has a lower connecting groove. The lower end of the spring is embedded in the upper connecting groove, and the upper end of the core column is screwed into the lower connecting groove. In this design, the upper connecting groove structure allows for the installation of springs with greater length, ensuring the spring's elasticity. The upper end of the core column has an external thread, and the lower connecting groove has an internal thread. The core column and the movable iron core are fastened together by the threads. The lower connecting groove, combined with the threaded connection, ensures a secure connection between the movable iron core and the core column while facilitating disassembly and installation.

[0024] Furthermore, the upper end of the fixed iron core includes a top plate with a wire hole, and the lower end of the outer casing includes a base plate with a mounting hole in the middle. The coil is located between the top plate and the base plate. In this design, the top plate and the fixed iron core are integrally formed, and the base plate and the outer casing are integrally formed. The combination of the top plate and the base plate makes the coil installation more stable.

[0025] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0026] This utility model designs a double-diaphragm, double-channel solenoid valve, with diaphragms and sealing gaskets in both channels. The opening and closing of the sealing gaskets is driven by a movable iron core. While the diaphragm isolates the fluid from the electromagnetic components, both channels can be opened and closed simultaneously. It has good corrosion resistance and a wide range of applications. The structural design of the sealing position inside the valve body increases the product's pressure resistance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the solenoid valve structure of this utility model;

[0028] Figure 2 This is a schematic AA cross-sectional view of the present invention;

[0029] Figure 3 This is a schematic diagram of the first core pillar structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the second core post structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the first valve body structure of this utility model;

[0032] Figure 6 This is a schematic diagram of the second valve body structure of this utility model;

[0033] In the above attached figures, 1. First valve body; 2. Second valve body; 3. First channel; 4. Second channel; 5. First left interface; 6. First right interface; 7. Second left interface; 8. Second right interface; 9. First core post; 10. Second core post; 11. First diaphragm; 12. Second diaphragm; 13. First upper limit ring; 14. First lower limit ring; 15. First receiving groove; 16. Second upper limit ring; 17. Second lower limit ring; 18. ... 19. First annular groove; 20. First sealing gasket; 21. First mounting hole; 22. First upper cavity; 23. First lower cavity; 24. Second annular groove; 25. Second sealing gasket; 26. Second mounting hole; 27. Second upper cavity; 28. Second lower cavity; 29. ​​Sealing ring; 30. First annular protrusion; 31. Second annular protrusion; 32. Movable iron core; 33. Fixed iron core; 34. Spring; 35. Coil; 36. Outer shell. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0035] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0039] Example:

[0040] See appendix Figure 1 and attached Figure 2 As shown, this embodiment provides a dual-diaphragm dual-channel solenoid valve, comprising:

[0041] The movable iron core 32 is connected above the core column and is used to drive the core column to move up and down.

[0042] A fixed iron core 33 is located above the movable iron core 32, and a gap is provided between the two; the gap is used to allow the movable iron core 32 to move up and down, and the gap is not greater than the maximum amplitude of the diaphragm's up and down movement.

[0043] Spring 34 is connected between movable iron core 32 and fixed iron core 33;

[0044] Coil 35 is sleeved on movable iron core 32 and fixed iron core 33;

[0045] The outer casing 36 is fitted onto the coil 35;

[0046] The movable iron core 32 has an upper connecting groove at its upper end and a lower connecting groove at its lower end. The lower end of the spring 34 is embedded in the upper connecting groove, and the upper end of the core column is screwed into the lower connecting groove. The upper connecting groove structure allows for the installation of a longer spring 34, ensuring its elasticity. The upper end of the core column has an external thread, and the lower connecting groove has an internal thread. The core column and the movable iron core 32 are connected by threads. The combination of the lower connecting groove and the threaded connection ensures a secure connection between the movable iron core 32 and the core column while facilitating disassembly and installation.

[0047] The upper end of the fixed iron core 33 includes a top plate with a wire hole, and the lower end of the outer casing 36 includes a base plate with a mounting hole in the middle. The coil 35 is located between the top plate and the base plate. The top plate and the fixed iron core 33 are integrally formed, and the base plate and the outer casing 36 are integrally formed. The combination of the top plate and the base plate makes the installation of the coil 35 more stable.

[0048] The valve body has a first channel 3 and a second channel 4. The first channel 3 includes a first left interface 5 and a first right interface 6, and the second channel 4 includes a second left interface 7 and a second right interface 8.

[0049] The core column can be moved up and down inside the valve body under the action of an electromagnet. The core column is provided with a first diaphragm 11 and a second diaphragm 12. The first channel 3 is located below the first diaphragm 11 and the second channel 4 is located below the second diaphragm 12.

[0050] When the core moves upward, the first channel 3 is open and the second channel 4 is open;

[0051] When the core moves downward, the first channel 3 is closed and the second channel 4 is closed.

[0052] See appendix Figure 5 and attached Figure 6 As shown, the valve body includes a first valve body 1 and a second valve body 2, which are vertically connected and detachably mounted; the first valve body 1 and the second valve body 2 are vertically corresponding and detachably fastened together by bolts. See appendix. Figure 3 and attached Figure 4 As shown, the core column includes a first core column 9 and a second core column 10, which are connected vertically and detachably. The center lines of the first core column 9 and the second core column 10 coincide, and they are detachably screwed together by internal and external threads. A first diaphragm 11 is disposed on the first core column 9, which is located inside the first valve body 1. A second diaphragm 12 is disposed on the second core column 10, which is located inside the second valve body 2. The valve body and core column are both configured as two separate, detachably connected parts, facilitating the installation and removal of the diaphragm on the core column and the core column within the valve body.

[0053] See appendix Figure 2As shown, the first core post 9 includes a first upper limit ring 13 and a first lower limit ring 14 coaxially arranged. A first receiving groove 15 is formed between the first upper limit ring 13 and the first lower limit ring 14 to accommodate the thickness of the first diaphragm 11. The first diaphragm 11 is sleeved on the body of the first core post 9 through the first receiving groove 15. The inner edge of the first diaphragm 11 abuts against the first upper limit ring 13 and the first lower limit ring 14 vertically. The outer edge of the first diaphragm 11 is limited within the first valve body 1. The first upper limit ring 13 and the first lower limit ring 14 limit the inner edge of the first diaphragm 11, and the first core post 9 moves up and down together with the inner edge of the first diaphragm 11. The first upper limit ring 13 and the first lower limit ring 14 are arranged vertically parallel on the body of the first core post 9 and are integrally formed with the body of the first core post 9.

[0054] The second core post 10 includes a second upper limit ring 16 and a second lower limit ring 17 coaxially arranged. A second receiving groove 18 is formed between the second upper limit ring 16 and the second lower limit ring 17 to accommodate the thickness of the second diaphragm 12. The second diaphragm 12 is sleeved on the body of the second core post 10 through the second receiving groove 18. The inner edge of the second diaphragm 12 abuts against the second upper limit ring 16 and the second lower limit ring 17 vertically. The outer edge of the second diaphragm 12 is limited within the second valve body 2. The second upper limit ring 16 and the second lower limit ring 17 limit the inner edge of the second diaphragm 12, and the second core post 10 moves up and down together with the inner edge of the second diaphragm 12. The second upper limit ring 16 and the second lower limit ring 17 are arranged vertically parallel on the body of the second core post 10 and are integrally formed with the body of the second core post 10.

[0055] The inner sides of the first receiving groove 15 and the second receiving groove 18 are both designed with arc-shaped structures to prevent damage to the diaphragm. By setting an upper limit ring and a lower limit ring on the core post to engage the diaphragm, the diaphragm can be both positioned and moved smoothly without being easily damaged.

[0056] See appendix Figure 3 As shown, a first annular groove 19 is provided on the body of the first core post 9. The first annular groove 19 is located below the first lower limit ring 14, and a first sealing gasket 20 is provided at the first annular groove 19.

[0057] The first valve body 1 has a first mounting hole 21 that runs vertically through it. The first core 9, the first diaphragm 11, and the first sealing gasket 20 are all disposed in the first mounting hole 21. The first sealing gasket 20 divides the first mounting hole 21 into a first upper cavity 22 and a first lower cavity 23. The first sealing gasket 20, together with the first core 9 and the first annular protrusion 30 inside the first valve body 1, forms a valve seat surface sealing structure, ensuring that the valve can effectively prevent the flow of the medium when closed, thereby increasing the pressure resistance of the product. The first core post 9, the first diaphragm 11, and the first sealing gasket 20 are installed together in the first mounting hole 21. The structure of the first mounting hole 21 is adapted to the structure composed of the first core post 9, the first diaphragm 11, and the first sealing gasket 20. The first mounting hole 21 has multiple stepped structures for installation. The outer edge of the first diaphragm 11 is used for limiting installation. The outer periphery of the first core post 9 and the first sealing ring 29 are provided with a certain distance from the inner wall of the first mounting hole 21, forming a cavity that allows the middle part of the first channel 3 to be connected, and also allowing the first core post 9 to move up and down within the first mounting hole 21. The first channel 3 is not a straight channel, but may include two channels that are staggered and connected through the first mounting hole 21.

[0058] The first left interface 5 is connected to the first lower cavity 23, and the first right interface 6 is connected to the first upper cavity 22. The first sealing gasket 20 moves up and down synchronously with the first core. When the first sealing gasket 20 moves upward, the first upper cavity 22 and the first lower cavity 23 are connected, and the first channel 3 is unobstructed. When the first sealing gasket 20 moves downward, the first upper cavity 22 and the first lower cavity 23 cannot be connected, and the first channel 3 is closed.

[0059] See appendix Figure 4 As shown, a second annular groove 24 is provided on the body of the second core post 10. The second annular groove 24 is located below the second lower limit ring 17. A second sealing gasket 25 is sleeved on the lower end of the second core post 10. The upper part of the second sealing gasket 25 is inserted into the second annular groove 24.

[0060] The upper end of the second valve body 2 is provided with a second mounting hole 26 (the lower end of the second mounting hole 26 does not penetrate the second valve body 2). The second core 10, the second diaphragm 12, and the second sealing gasket 25 are all disposed in the second mounting hole 26. The second sealing gasket 25 divides the second mounting hole 26 into a second upper cavity 27 and a second lower cavity 28. The second sealing gasket 25 forms a valve seat surface sealing structure with the second core 10 and the second annular protrusion 31 inside the second valve body 2, ensuring that the valve can effectively prevent the flow of the medium when closed, thereby increasing the pressure resistance of the product. The second core post 10, the second diaphragm 12, and the second sealing gasket 25 are installed together in the second mounting hole 26. The structure of the second mounting hole 26 is adapted to the structure formed by the second core post 10, the second diaphragm 12, and the second sealing gasket 25. The second mounting hole 26 has a stepped structure for installation. The outer edge of the second diaphragm 12 is used for limiting installation. The outer periphery of the second core post 10 and the second sealing ring 29 are both provided with a certain distance from the inner wall of the second mounting hole 26, forming a cavity that allows the middle part of the second channel 4 to be connected. This also allows the second core post 10 to move up and down within the second mounting hole 26. The second channel 4 is not a straight channel; it can be two channels that are staggered and connected through the second mounting hole 26.

[0061] The second left interface 7 is connected to the second lower cavity 28, and the second right interface 8 is connected to the second upper cavity 27. The second sealing gasket 25 moves up and down synchronously with the second core. When the second sealing gasket 25 moves upward, the second upper cavity 27 and the second lower cavity 28 are connected, and the second channel 4 is unobstructed. When the second sealing gasket 25 moves downward, the second upper cavity 27 and the second lower cavity 28 cannot be connected, and the second channel 4 is closed.

[0062] See appendix Figure 2 As shown, the lower end of the first core post 9 passes through the first valve body 1 and connects to the second core post 10 inside the second valve body 2. A sealing ring 29 is fitted onto the lower end of the first core post 9, and the sealing ring 29 is located below the first channel 3. A mounting groove is provided inside the first valve body 1 corresponding to the mounting position of the sealing ring 29, and the sealing ring 29 is engaged in the mounting groove. The sealing ring 29 can prevent interference between the cavities of the first channel 3 and the second channel 4; the mounting groove can limit the sealing ring 29 and prevent it from being moved by the first core post 9 when it moves up and down.

[0063] See appendix Figure 2As shown, a first annular protrusion 30 is provided below the first sealing gasket 20, and the first annular protrusion 30 is disposed on the first valve body 1 and located within the first mounting hole 21; a second annular protrusion 31 is provided below the second sealing gasket 25, and the second annular protrusion 31 is disposed on the second valve body 2 and located within the second mounting hole 26. The annular protrusions are integrally disposed with the corresponding valve bodies. The arrangement of the annular protrusions allows the sealing gaskets to undergo a certain deformation when subjected to the downward force of the solenoid valve's spring 34, thereby achieving a better sealing effect.

[0064] The materials of the first sealing gasket 20 and the second sealing gasket 25 include, but are not limited to, fluororubber material PTFE.

[0065] The materials used for the diaphragm include, but are not limited to, fluororubber.

[0066] Installation of the structure: The movable iron core 32, spring 34, and coil 35 are installed into the outer casing 36, and the fixed iron core 33 is pressed into the outer casing 36 to form an electromagnet. After installing the first diaphragm 11 and the first sealing gasket 20 on the first core post 9, the movable iron core 32 is screwed in, and the first valve body 1 is installed. After installing the second diaphragm 12 and the second sealing gasket 25 on the second core post 10, the second core post 10 is screwed in, and finally the second valve body 2 is installed and locked.

[0067] When the electromagnet is energized, the movable iron core 32 will drive the first core column 9 and the second core column 10 to move upward. At this time, the first sealing gasket 20 and the second sealing gasket 25 will move upward at the same time, leaving the valve seat surface, and the first channel 3 and the second channel 4 will open simultaneously.

[0068] After the electromagnet is de-energized, under the elastic force of the spring 34, the movable iron core 32 will drive the first core column 9 and the second core column 10 to move downward. At this time, the first sealing gasket 20 and the second sealing gasket 25 will move downward at the same time and press back onto the valve seat surface, and the first channel 3 and the second channel 4 will close simultaneously.

[0069] The dual-diaphragm dual-channel solenoid valve designed in this utility model is equipped with a diaphragm and a sealing gasket in both channels. The opening and closing of the sealing gasket is driven by the movable iron core 32. While the diaphragm isolates the fluid from the electromagnetic component, the two channels can be opened and closed simultaneously. It has good corrosion resistance and a wide range of applications. The structural design of the sealing position in the valve body increases the pressure resistance of the product.

[0070] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A dual-diaphragm, dual-channel solenoid valve, characterized in that, include: The valve body has a first channel (3) and a second channel (4). The first channel (3) includes a first left interface (5) and a first right interface (6). The second channel (4) includes a second left interface (7) and a second right interface (8). The core column can be moved up and down inside the valve body under the action of an electromagnet. The core column is provided with a first diaphragm (11) and a second diaphragm (12). The first channel (3) is located below the first diaphragm (11), and the second channel (4) is located below the second diaphragm (12). When the core moves upward, the first channel (3) is open and the second channel (4) is open; When the core moves downward, the first channel (3) is closed and the second channel (4) is closed.

2. The dual-diaphragm dual-channel solenoid valve according to claim 1, characterized in that: The valve body includes a first valve body (1) and a second valve body (2), which are connected vertically and are detachably mounted. The core column includes a first core column (9) and a second core column (10), which are connected vertically and are detachably arranged; The first diaphragm (11) is disposed on the first core column (9), which is disposed inside the first valve body (1); the second diaphragm (12) is disposed on the second core column (10), which is disposed inside the second valve body (2).

3. The dual-diaphragm dual-channel solenoid valve according to claim 2, characterized in that: The first core column (9) includes a first upper limit ring (13) and a first lower limit ring (14) arranged coaxially. A first receiving groove (15) is formed between the first upper limit ring (13) and the first lower limit ring (14) to accommodate the thickness of the first diaphragm (11). The first diaphragm (11) is sleeved on the body of the first core column (9) through the first receiving groove (15). The inner edge of the first diaphragm (11) is in vertical contact with the first upper limit ring (13) and the first lower limit ring (14). The outer edge of the first diaphragm (11) is limited and disposed in the first valve body (1). The second core column (10) includes a second upper limit ring (16) and a second lower limit ring (17) arranged coaxially. A second receiving groove (18) is formed between the second upper limit ring (16) and the second lower limit ring (17) to accommodate the thickness of the second diaphragm (12). The second diaphragm (12) is sleeved on the body of the second core column (10) through the second receiving groove (18). The inner edge of the second diaphragm (12) is in vertical contact with the second upper limit ring (16) and the second lower limit ring (17). The outer edge of the second diaphragm (12) is limited and disposed in the second valve body (2).

4. The dual-diaphragm dual-channel solenoid valve according to claim 3, characterized in that: The first core post (9) has a first annular groove (19) on its body. The first annular groove (19) is located below the first lower limit ring (14). A first sealing gasket (20) is provided at the first annular groove (19). The first valve body (1) has a first mounting hole (21) that runs vertically through it. The first core (9), the first diaphragm (11) and the first sealing gasket (20) are all disposed in the first mounting hole (21). The first sealing gasket (20) divides the first mounting hole (21) into a first upper cavity (22) and a first lower cavity (23). The first left interface (5) is connected to the first lower cavity (23), and the first right interface (6) is connected to the first upper cavity (22).

5. A dual-diaphragm dual-channel solenoid valve according to claim 4, characterized in that: The second core post (10) has a second annular groove (24) on its body. The second annular groove (24) is located below the second lower limit ring (17). The lower end of the second core post (10) is fitted with a second sealing gasket (25). The upper part of the second sealing gasket (25) is inserted into the second annular groove (24). The upper end of the second valve body (2) is provided with a second mounting hole (26), and the second core (10), the second diaphragm (12) and the second sealing gasket (25) are all disposed in the second mounting hole (26); the second sealing gasket (25) divides the second mounting hole (26) into a second upper cavity (27) and a second lower cavity (28); The second left interface (7) is connected to the second lower cavity (28), and the second right interface (8) is connected to the second upper cavity (27).

6. A dual-diaphragm dual-channel solenoid valve according to claim 2, characterized in that: The lower end of the first core column (9) passes through the first valve body (1) and is connected to the second core column (10) in the second valve body (2). A sealing ring (29) is fitted on the lower end of the first core column (9). The sealing ring (29) is located below the first channel (3). An installation groove is provided in the first valve body (1) corresponding to the installation position of the sealing ring (29). The sealing ring (29) is locked in the installation groove.

7. A dual-diaphragm dual-channel solenoid valve according to claim 5, characterized in that: A first annular protrusion (30) is provided below the first sealing gasket (20), and the first annular protrusion (30) is provided on the first valve body (1) and located in the first mounting hole (21); a second annular protrusion (31) is provided below the second sealing gasket (25), and the second annular protrusion (31) is provided on the second valve body (2) and located in the second mounting hole (26).

8. A dual-diaphragm dual-channel solenoid valve according to claim 1, characterized in that: The solenoid valve also includes: Movable iron core (32), which is connected above the core column and is used to drive the core column to move up and down; A fixed iron core (33) is located above the movable iron core (32) and there is a gap between them; A spring (34) is connected between the movable iron core (32) and the fixed iron core (33); A coil (35) is sleeved on the movable iron core (32) and the fixed iron core (33); The outer casing (36) is fitted onto the coil (35).

9. A dual-diaphragm dual-channel solenoid valve according to claim 8, characterized in that: The upper end of the movable iron core (32) is provided with an upper connecting groove, the lower end of the movable iron core (32) is provided with a lower connecting groove, the lower end of the spring (34) is embedded in the upper connecting groove, and the upper end of the core column is screwed into the lower connecting groove.

10. A dual-diaphragm dual-channel solenoid valve according to claim 8, characterized in that: The upper end of the fixed iron core (33) includes a top plate with a wire hole, and the lower end of the outer shell (36) includes a base plate with a mounting hole in the middle. The coil (35) is located between the top plate and the base plate.

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