A precision double-channel electromagnetic valve using disc-type electromagnet principle

Abstract

The utility model discloses a kind of precision double-channel electromagnetic valves of application disc type electromagnet principle, it includes: lower shell and upper shell, set in the soft iron of lower shell, coil being set in the soft iron, rubber-coated iron sheet and at least two wire terminals being set on lower shell and being used to be connected with coil between the lower shell and upper shell, wherein, the center of lower shell is provided with exhaust hole, upper shell is provided with gas outlet, the first air passage of soft iron center is provided with communication exhaust hole, rubber-coated iron sheet is provided with the first through-hole of communication lower shell cavity and upper shell cavity;The center of upper shell is provided with the air inlet hole coaxial with first air passage, the air inlet hole and first air passage are located respectively on the two sides of rubber-coated iron sheet, and when coil is powered on and powered off, rubber-coated iron sheet can be respectively elastically attached and blocked on first air passage and air inlet hole.

Description

Technical fields:

[0001] This utility model relates to the field of control valve technology, and specifically to a precision dual-channel solenoid valve that applies the principle of disc electromagnet. Background technology:

[0002] A solenoid valve is an automated device that controls the flow of liquids or gases using electromagnetic force. It is widely used in industrial, household, medical, and automotive industries. It relies on the energization or de-energization of an electromagnetic coil to quickly open or close the valve, thereby precisely regulating the flow direction and flow rate of fluids. Solenoid valves play a vital role in modern automation systems due to their fast response, simple structure, and precise control.

[0003] Solenoid valves are among the most common types. A solenoid valve uses the electromagnetic force generated by an electromagnetic coil (i.e., a solenoid) to drive the valve core, quickly and precisely opening or closing the valve to regulate the flow and direction of fluid. For example, a solenoid valve and its core assembly, disclosed in Chinese Patent Publication No. CN 219198295 U, describes a solenoid valve and its core assembly. When opening the valve: energizing the coil 19 causes the moving core 13 to move upwards (towards the opening direction) under electromagnetic force. Since the connecting rod 15 and the moving core 13 can move relative to each other at this time, and the sealing plug 14 has not yet moved, the moving core 13 only needs to overcome its own weight and the elastic force of the core spring 12, regardless of the water pressure, requiring relatively little magnetic force. When the moving core 13 moves to the point where the first limiting protrusion 151 of the connecting rod 15 abuts against the limiting guide sleeve 161, as... Figure 3 As shown, the moving iron core 13 initially drives the connecting rod 15 upward, thereby moving the sealing plug 14 upward. At this time, the moving iron core 13 has moved a certain distance closer to the stationary iron core 11, reducing the distance between them. The magnetic force on the moving iron core 13 increases, and even with increased water pressure, it can pull the connecting rod 15 upward, causing the sealing plug 14 to move away from the sealing hole 21, until the valve is fully opened. Figure 2 As shown, the instant-open valve is less affected by fluid pressure, does not require shortening the stroke of the moving iron core 13, has stable and reliable switching valve performance, and does not require increasing the number of turns of the coil 19, which is conducive to miniaturization and hardly increases the cost.

[0004] When the valve is closed, coil 19 is de-energized, and the moving iron core 13 moves downward under its own weight and the elastic force of the iron core spring 12, pushing the connecting rod 15 to move downward with the sealing plug 14 until the sealing plug 14 seals and blocks the hole 21 to be sealed. Figure 4 As shown, the valve is now closed.

[0005] As mentioned above, although solenoid valves are widely used in many applications due to their simplicity, reliability, and ease of control, they also have some inherent limitations and shortcomings. Furthermore, since most solenoid valves currently on the market use a design with a flat column stop, this type requires a large amount of metal for magnetic confinement, resulting in high costs, and also requires a large amount of copper wire for the windings to maintain the magnetic force. The procurement, assembly, and debugging of its multiple components also increase the overall system cost.

[0006] In view of the above, the inventors propose the following technical solution. Utility model content:

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a precision dual-channel solenoid valve that applies the principle of disc electromagnet.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a precision dual-channel solenoid valve applying the principle of a disc electromagnet, comprising: a lower housing and an upper housing, a soft iron disposed in the lower housing, a coil disposed in the soft iron, a rubber-coated iron sheet disposed between the lower housing and the upper housing, and at least two terminals disposed on the lower housing for connection with the coil. The lower housing has a vent hole at its center, the upper housing has an air outlet hole, the soft iron has a first air passage connecting to the vent hole at its center, and the rubber-coated iron sheet has a first through hole connecting the lower housing cavity and the upper housing cavity. The upper housing has an air inlet hole coaxial with the first air passage at its center. The air inlet hole and the first air passage are located on opposite sides of the rubber-coated iron sheet, and the rubber-coated iron sheet can elastically seal the first air passage and the air inlet hole respectively when the coil is energized and de-energized.

[0009] Furthermore, in the above technical solution, the rubber-coated iron sheet includes an elastic support member clamped between the lower housing and the upper housing, and an iron ring embedded in the elastic support member and facing the soft iron and the coil.

[0010] Furthermore, in the above technical solution, the soft iron is provided with a first annular groove for mounting the coil, the iron ring is directly opposite the first annular groove, and the first air passage passes through the center of the protrusion in the middle of the first annular groove.

[0011] Furthermore, in the above technical solution, the elastic support member is provided with a first protrusion and a second protrusion on both sides of its center, which can elastically press and block the first air passage and the air inlet, and the diameters of the first protrusion and the second protrusion are respectively larger than the diameters of the first air passage and the air inlet.

[0012] Furthermore, in the above technical solution, the elastic support includes a support plate portion for mounting the iron ring piece, a sealing ring portion located between the lower housing and the upper housing and in contact and pressed together, and an elastic connecting portion connecting the support plate portion and the sealing ring portion and capable of elastic deformation, wherein the first through hole penetrates the elastic support and the iron ring piece in the support plate portion region, and the first through hole is located around the first protrusion and the second protrusion.

[0013] Furthermore, in the above technical solution, the outer periphery of the first protrusion is provided with a second annular groove for elastic deformation, and the outer periphery of the second annular groove is provided with a third annular groove for mounting the iron ring piece, and the third annular groove is located between the elastic part and the second annular groove.

[0014] Furthermore, in the above technical solution, the upper and lower end faces of the sealing ring are respectively provided with a first sealing rib and a second sealing rib for pressing and sealing with the lower housing and the upper housing.

[0015] Furthermore, in the above technical solution, a second sealing ring is provided between the bottom of the soft iron and the lower housing, and the second sealing ring is located around the exhaust hole and the first air passage.

[0016] Furthermore, in the above technical solution, the upper housing is provided with at least two elastic fastening arms for matching and fastening with the lower housing, the lower housing is provided with at least two locking blocks for matching and fastening with the elastic fastening arms, and the outer wall of the lower housing is provided with a first limiting groove for the elastic fastening arms to be inserted into and fixed with the locking blocks.

[0017] Furthermore, in the above technical solution, the lower housing is provided with a positioning cavity for installing soft iron, and the opening of the positioning cavity is chamfered to facilitate the installation of soft iron.

[0018] After adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: By setting a first air passage connecting the exhaust hole in the center of the soft iron, and setting a first through hole connecting the first air passage with the exhaust hole and the intake hole on the rubber-coated iron sheet, and when the coil is not energized, the rubber-coated iron sheet is attached to and sealed on the intake hole, at which time the first air passage and the exhaust hole remain connected. When the coil is energized, the rubber-coated iron sheet is forced to adhere to and seal on the first air passage, at which time the intake hole and the exhaust hole remain connected. Thus, the connection between the exhaust hole and the intake hole and the exhaust hole is controlled by the conduction and disconnection of the coil, realizing the function of a dual-channel solenoid valve. The valve has a simple overall structure, few parts, and is easy to assemble. Most parts can be made of plastic, reducing the amount of traditional metal used and significantly reducing costs. Attached image description:

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a diagram of the internal structure of this utility model;

[0021] Figure 3 This is a breakdown of the utility model. Figure 1 ;

[0022] Figure 4 This is a breakdown of the utility model. Figure 2 . Detailed implementation method:

[0023] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0024] See Figures 1 to 4 As shown, a precision dual-channel solenoid valve applying the principle of a disc electromagnet is presented. It includes: a lower housing 1 and an upper housing 4, a soft iron 2 disposed in the lower housing 1, a coil 8 disposed in the soft iron 2, a rubber-coated iron sheet 3 disposed between the lower housing 1 and the upper housing 4, and at least two terminals 5 disposed on the lower housing 1 for connection with the coil 8. The lower housing 1 has an exhaust hole 11 at its center, the upper housing 4 has an air outlet 42, the soft iron 2 has a first air passage 21 connected to the exhaust hole 11 at its center, and the rubber-coated iron sheet 3 has a first through hole 310 connecting the cavity of the lower housing 1 and the cavity of the upper housing 4. The upper housing 4 has an air inlet 43 coaxial with the first air passage 21 at its center. The air inlet 43 and the first air passage 21 are located on opposite sides of the rubber-coated iron sheet 3, and the rubber-coated iron sheet 3 can elastically fit and seal the first air passage 21 and the air inlet 43 when the coil 8 is energized and de-energized, respectively. A first air passage 21 is set in the center of the soft iron 2, connecting to the exhaust port 11. A first through hole 310 is set on the rubber-coated iron sheet 3, connecting the first air passage 21 with the exhaust port 42 and the intake port 43. When the coil 8 is not energized, the rubber-coated iron sheet 3 is attached to and sealed on the intake port 43, and the first air passage 21 and the exhaust port 42 remain connected. When the coil 8 is energized, the rubber-coated iron sheet 3 is forced to adhere to and seal on the first air passage 21, and the intake port 43 and the exhaust port 42 remain connected. Thus, the connection between the exhaust port 42 and the intake port 43 and the exhaust port 11 is controlled by the conduction and disconnection of the coil 8, realizing the function of a dual-channel solenoid valve. The valve has a simple overall structure, few parts, and is easy to assemble. Most parts can be made of plastic, reducing the amount of traditional metal used and significantly reducing costs.

[0025] The coated iron sheet 3 includes an elastic support 31 clamped between the lower housing 1 and the upper housing 4, and an iron ring 32 embedded in the elastic support 31 and facing the soft iron 2 and the coil 8. The iron ring 32 is made of ferritic stainless steel and is integrally formed with the elastic support 31 by molding. The coil 8 is made of copper wire, wound using hot-applied enameled wire, and is bonded to the soft iron 3 using adhesive.

[0026] The elastic support member 31 has a first protrusion 311 and a second protrusion 312 on its two central sides, which can elastically press and block the first air passage 21 and the air inlet 43. The diameters of the first protrusion 311 and the second protrusion 312 are larger than the diameters of the first air passage 21 and the air inlet 43, respectively. By setting the first protrusion 311 and the second protrusion 312 on both sides of the elastic support member 31, the elastic deformation capability of the elastic support member 31 allows the first protrusion 311 and the second protrusion 312 to float and swing under force. By setting the first protrusion 311 and the second protrusion 312 at the ends of the first air passage 21 and the air inlet 43, when the elastic support member 31 is not under force, the second protrusion 312 remains pressed against the air inlet 43, blocking the air inlet 43, thus blocking the air outlet 42 and the first air inlet 43. When the air passage 21 cannot connect with the air inlet 43, the fluid flowing in from the air outlet 42 flows out from the exhaust port 11 through the first through hole 310 and the first air passage 21. When the elastic support 31 is deformed by force, the first protrusion 311 swings and sticks to the first air passage 21, blocking the first air passage 21. At the same time, the second protrusion 312 disengages from the air inlet 43, so that the air outlet 42 connects with the air inlet 43, allowing the fluid to enter from the air inlet 43 and then flow out from the air outlet 42, thereby realizing dual-channel valve control.

[0027] The elastic support 31 includes a support plate portion 313 for mounting the iron ring piece 32, a sealing ring portion 314 located between the lower housing 1 and the upper housing 4 and in contact and pressed together, and an elastic connecting portion 315 connecting the support plate portion 313 and the sealing ring portion 314 and capable of elastic deformation. A first through hole 310 penetrates the elastic support 31 and the iron ring piece 32 in the area of ​​the support plate portion 313, and the first through hole 310 is located around the first protrusion 311 and the second protrusion 312. The elastic connecting portion 315 connects the support plate portion 313 and the sealing ring portion 314, so that when the iron ring piece 32 is subjected to force, it can drive the support plate portion 313 to swing, thereby enabling the iron ring piece 32 to move the support plate portion 313 to different positions when the coil 8 is energized and de-energized. This achieves the sealing of the first air passage 21 and the air inlet 43 by the first protrusion 311 and the second protrusion 312.

[0028] The first protrusion 311 is provided with a second annular groove 316 for elastic deformation, and a third annular groove 317 for mounting the iron ring plate 32 is provided around the second annular groove 316. The third annular groove 317 is located between the elastic connecting part 315 and the second annular groove 316.

[0029] The upper and lower end faces of the sealing ring 314 are respectively provided with a first sealing rib and a second sealing rib for pressing and sealing with the lower housing 1 and the upper housing 4.

[0030] The soft iron 2 is provided with a first annular groove 23 for mounting the coil 8. The iron ring 32 is directly opposite the first annular groove 23, and the first air passage 21 passes through the center of the protrusion in the middle of the first annular groove 23.

[0031] The lower housing 1 is provided with a positioning cavity 10 for installing the soft iron 2. The opening of the positioning cavity 10 is chamfered to facilitate the installation of the soft iron 2. The soft iron 2 is bonded to the positioning cavity 10 with adhesive to form a whole. A second sealing ring 7 is provided between the bottom of the soft iron 2 and the lower housing 1, and the second sealing ring 7 is located on the periphery of the exhaust port 11 and the first air passage 21. By providing the second sealing ring 7 between the bottom of the soft iron 2 and the lower housing 1, the gap between the soft iron 2 and the inner wall of the positioning cavity 10 can be sealed after the soft iron 2 is installed in the positioning cavity 10 of the lower housing 1. This prevents fluid from flowing directly into the second air passage 22 from the gap between the soft iron 2 and the lower housing 1, ensuring the control effect of the valve body. Of course, in order to ensure the sealing effect between the soft iron 2 and the lower housing 1, the bottom periphery of the positioning cavity 10 is provided with an installation ring groove for installing the second sealing ring 7.

[0032] The upper housing 4 is provided with at least two elastic fastening arms 41 for matching and fastening with the lower housing 1. The lower housing 1 is provided with at least two locking blocks 13 for matching and fastening with the elastic fastening arms 41. The outer wall of the lower housing 1 is provided with a first limiting groove 14 for the elastic fastening arms 41 to be inserted into and fixed with the locking blocks 13.

[0033] The terminal 5 is a standard terminal. The upper housing 4 and the terminal 5 are pressed together using equipment. The rubber-coated iron sheet 3 is installed in the lower housing 1. Then, the upper housing 4 and the lower housing 1 are assembled and fastened together. After completion, the leads of the coil 8 are wound and fixed to the terminal 5 respectively, and the excess leads are cut off. The terminal 5 with the wound wires is immersed in the tin bath to complete the soldering.

[0034] In summary, the working principle of this utility model is as follows: In the initial state, the terminal 5 is not energized, and the rubber-coated iron sheet 3 tends to be flat. At this time, the first protrusion 311 is not in contact with the soft iron 2, and the second protrusion 312 is in contact with and presses against the air inlet 43. The internal passage of the valve body is: air outlet 42 → first through hole 310 → first air passage 21 → exhaust hole 11, or the reverse direction. Furthermore, when the terminal 5 is powered on, the coil 8 connected to it generates a magnetic force due to the power supply and magnetizes the soft iron 2. The strong magnetic force will attract the iron ring 32 on the rubber-coated iron sheet 3, causing the entire rubber-coated iron sheet 3 to deform and stick together with the soft iron 2. At this time, the first protrusion 311... 11 is pressed against the first air passage 21 to block it, while the second protrusion 312 disengages from the air inlet 43 to open it. At this time, the internal passage of the valve body is: air inlet 43 → air outlet 42. Furthermore, when the power supply of the terminal 5 is cut off, the magnetic force of the coil 8 disappears, the force attracting the rubber-coated iron sheet 3 no longer exists, the arc-shaped rubber elastic connection part 315 of the rubber-coated iron sheet 3 springs back to its original position, the entire rubber-coated iron sheet 3 is pulled open, the first air passage 21 of the center hole of the soft iron 2 is opened, and the air passage in the direction of the air nozzle exhaust hole 11 of the lower housing 1 is opened. At this time, the internal passage of the valve body is: air outlet 42 → first through hole 310 → first air passage 21 → exhaust hole 11.

[0035] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A precision dual-channel solenoid valve applying the principle of a disc electromagnet, characterized in that, include: The lower housing (1) and the upper housing (4), the soft iron (2) disposed in the lower housing (1), the coil (8) disposed in the soft iron (2), the rubber-coated iron sheet (3) disposed between the lower housing (1) and the upper housing (4), and at least two terminals (5) disposed on the lower housing (1) for connecting with the coil (8), wherein the lower housing (1) is provided with an exhaust hole (11) at its center, the upper housing (4) is provided with an air outlet (42), the soft iron (2) is provided with a first air passage (21) communicating with the exhaust hole (11) at its center, and the rubber-coated iron sheet (3) is provided with a first through hole (310) communicating with the cavity of the lower housing (1) and the cavity of the upper housing (4); The upper housing (4) has an air inlet (43) coaxial with the first air passage (21) at its center. The air inlet (43) and the first air passage (21) are located on opposite sides of the rubber-coated iron sheet (3). When the coil (8) is energized and de-energized, the rubber-coated iron sheet (3) can elastically fit and seal the first air passage (21) and the air inlet (43) respectively.

2. A precision dual-channel solenoid valve applying the principle of a disc electromagnet as described in claim 1, characterized in that: The coated iron sheet (3) includes an elastic support (31) clamped between the lower housing (1) and the upper housing (4) and an iron ring (32) embedded in the elastic support (31) and facing the soft iron (2) and the coil (8).

3. A precision dual-channel solenoid valve applying the principle of a disc electromagnet as described in claim 2, characterized in that: The soft iron (2) is provided with a first annular groove (23) for mounting the coil (8), the iron ring (32) is directly opposite the first annular groove (23), and the first air passage (21) passes through the center of the protrusion in the middle of the first annular groove (23).

4. A precision dual-channel solenoid valve applying the principle of a disc electromagnet as described in claim 3, characterized in that: The elastic support member (31) has a first protrusion (311) and a second protrusion (312) on its two sides, which can elastically press and block the first air passage (21) and the air inlet (43), and the diameters of the first protrusion (311) and the second protrusion (312) are larger than the diameters of the first air passage (21) and the air inlet (43), respectively.

5. A precision dual-channel solenoid valve applying the principle of a disc electromagnet according to claim 2, characterized in that: The elastic support member (31) includes a support plate portion (313) for mounting the iron ring piece (32), a sealing ring portion (314) located between the lower housing (1) and the upper housing (4) and in contact and pressed together, and an elastic connecting portion (315) connecting the support plate portion (313) and the sealing ring portion (314) and capable of elastic deformation. The first through hole (310) penetrates the elastic support member (31) and the iron ring piece (32) in the area of ​​the support plate portion (313), and the first through hole (310) is located around the first protrusion (311) and the second protrusion (312).

6. A precision dual-channel solenoid valve applying the principle of a disc electromagnet according to claim 5, characterized in that: The first protrusion (311) is provided with a second annular groove (316) for elastic deformation, and a third annular groove (317) for mounting the iron ring piece (32) is provided around the second annular groove (316). The third annular groove (317) is located between the elastic connecting part (315) and the second annular groove (316).

7. A precision dual-channel solenoid valve applying the principle of a disc electromagnet as described in claim 6, characterized in that: The upper and lower end faces of the sealing ring (314) are respectively provided with a first sealing rib and a second sealing rib for sealing by pressing against the lower housing (1) and the upper housing (4).

8. A precision dual-channel solenoid valve applying the principle of a disc electromagnet according to claim 6, characterized in that: A second sealing ring (7) is provided between the bottom of the soft iron (2) and the lower housing (1), and the second sealing ring (7) is located around the exhaust hole (11) and the first air passage (21).

9. A precision dual-channel solenoid valve applying the principle of a disc electromagnet according to any one of claims 1-8, characterized in that: The upper housing (4) is provided with at least two elastic fastening arms (41) for matching and fastening with the lower housing (1), the lower housing (1) is provided with at least two locking blocks (13) for matching and fastening with the elastic fastening arms (41), and the outer wall of the lower housing (1) is provided with a first limiting groove (14) for the elastic fastening arms (41) to be inserted into and fixed with the locking blocks (13).

10. A precision dual-channel solenoid valve applying the principle of a disc electromagnet as described in claim 9, characterized in that: The lower housing (1) is provided with a positioning cavity (10) for installing the soft iron (2), and the opening of the positioning cavity (10) is chamfered to facilitate the installation of the soft iron (2).

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