Electromagnetic valve structure of air suspension

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve structure of an air suspension, which comprises a first plunger tube, a second plunger tube and a valve seat. A protrusion is arranged on the valve seat, the first end of the valve seat is fixed in the first plunger tube, and the second end of the valve seat is fixed in the second plunger tube. And in an assembling state, the first magnetism isolating tube and the second magnetism isolating tube are both propped against the bulge. The two ends of the valve seat are sleeved with the first plunger tube and the second plunger tube respectively, so that the ends of the valve seat are prevented from being exposed, the stability of connection between the valve seat and the first plunger tube and between the valve seat and the second plunger tube can be improved, and the sealing effect of the cavity is guaranteed. The overall size of the valve seat is expanded, the matching face of the valve seat and the moving iron is longer, the moving iron is prevented from shaking and inclining, and the moving iron is prevented from being abraded. The stability of the protrusions can be guaranteed under the abutting connection of the first magnetism isolating tube and the second magnetism isolating tube, so that the valve seat does not shake with the first magnetism isolating tube and the second magnetism isolating tube, the stability of the valve seat is improved, and meanwhile the sealing effect of the cavity is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a solenoid valve structure of an air suspension. Background Art

[0002] The rapid development of electric vehicles has led to the increasing popularity of air suspensions. Previously reserved for a handful of high-end models, they are now available on vehicles priced over 200,000 yuan. An air suspension system consists of air springs, sensors, and an air supply unit. The air supply unit requires a solenoid valve to control the air flow, thereby controlling the air spring's rise and fall.

[0003] The existing solenoid valve has an upper magnetic isolation tube, a lower magnetic isolation tube and a valve seat, wherein part of the valve seat extends into and is fixed in the upper magnetic isolation tube, and part of the lower magnetic isolation tube extends into and is fixed in the valve seat, so that the upper magnetic isolation tube, the valve seat and the lower magnetic isolation tube can form a cavity, and a moving iron is arranged in the cavity, which can move in the cavity.

[0004] However, the valve seat is unstable after being connected to the upper and lower magnetic isolation tubes. The end of the valve seat connected to the lower magnetic isolation tube is directly exposed outside the solenoid valve, and is easily bumped during transportation or disassembly, thereby causing the connection between the valve seat and the lower magnetic isolation tube to become detached or shake, affecting the sealing effect.

[0005] At the same time, since the valve seat only partially extends into the upper magnetic isolation tube and there is no corresponding valve seat structure in the lower magnetic isolation tube, the size of the valve seat in the cavity is relatively small, that is, the mating surface between the moving iron and the valve seat is relatively short, which makes the valve seat have poor guidance for the moving iron. The moving iron is easily affected by the airflow during movement, causing shaking and tilting, which makes the moving iron prone to wear and jamming. Utility Model Content

[0006] In view of the above problems existing in the prior art, the utility model provides a solenoid valve structure for an air suspension.

[0007] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0008] A solenoid valve structure for an air suspension includes a first magnetic isolation tube, a second magnetic isolation tube, and a valve seat; a protrusion is provided on a circumferential outer wall of the valve seat, wherein a first end of the valve seat extends into and is fixed in the first magnetic isolation tube, and a second end of the valve seat extends into and is fixed in the second magnetic isolation tube;

[0009] In the assembled state, both the first magnetic isolation tube and the second magnetic isolation tube abut against the protrusion.

[0010] Preferably, in a direction away from the first magnetic isolation tube, the second magnetic isolation tube has a first mounting portion and a second mounting portion, the inner diameter of the first mounting portion is larger than the inner diameter of the second mounting portion; the second end of the valve seat extends into and is fixed in the first mounting portion.

[0011] Preferably, the second magnetic isolation tube also includes a connecting portion for connecting the first mounting portion and the second mounting portion, and the angles between the connecting portion and the first mounting portion and the second mounting portion are obtuse angles or right angles; the second end of the valve seat extends into and is fixed at the connection between the first mounting portion and the connecting portion.

[0012] Preferably, the valve further comprises a movable iron having a tail portion, a middle portion, and a head portion, and a valve core; the tail portion extends into the first magnetic isolation tube, the middle portion is inserted into the through hole of the valve seat, and the head portion extends into the second mounting portion; the valve core is fixedly mounted on an end of the second mounting portion away from the first magnetic isolation tube;

[0013] The moving iron can reciprocate along the axial direction of the cavity formed by the first magnetic isolation tube, the valve seat and the second magnetic isolation tube to achieve the blocking and opening of the central hole of the valve core.

[0014] Preferably, when the head portion abuts against the valve core and seals the central hole, the end surface of the middle portion facing the valve core does not extend out of the through hole.

[0015] Preferably, the size of the head portion matches the size of the second mounting portion.

[0016] Preferably, a static iron is fixedly mounted on the end of the first magnetic isolation tube away from the second magnetic isolation tube, and the static iron is used to drive the moving iron to move in the cavity.

[0017] Preferably, when the tail portion abuts against the stationary iron, the end surface of the middle portion facing the valve core is located in the second mounting portion.

[0018] Preferably, the size of the middle portion matches the size of the second mounting portion.

[0019] Preferably, the head includes a connecting block and a sealing member fixedly mounted on the connecting block. When the moving iron moves toward the valve core, the head abuts against the valve core through the sealing member to seal the center hole.

[0020] The utility model has at least the following beneficial effects:

[0021] 1. By arranging the second end of the valve seat to extend into and be fixed in the second magnetic isolation tube, the two ends of the valve seat can be respectively sleeved by the first magnetic isolation tube and the second magnetic isolation tube, which can better achieve the concealment of the two ends of the valve seat, avoid the exposure of the end of the valve seat, and thus better avoid the collision of the end of the valve seat during transportation or disassembly, and can better improve the stability of the fixed connection between the valve seat and the first magnetic isolation tube and the second magnetic isolation tube, thereby ensuring the sealing effect of the cavity.

[0022] 2. Since the second end of the valve seat is further extended into the second magnetic isolation tube, the overall size of the valve seat is expanded, making the matching surface between the valve seat and the moving iron in the cavity longer, so that the valve seat can have better guidance for the movement of the moving iron, and can prevent the moving iron from shaking and tilting due to the influence of airflow during movement, thereby better protecting the moving iron, preventing the moving iron from wear, and better improving the smoothness of the movement of the moving iron.

[0023] 3. During transportation or disassembly, when the protrusion is touched by the outside world, the abutment of the first magnetic isolation tube and the second magnetic isolation tube can ensure the stability of the protrusion, thereby ensuring the stability of the valve seat, so that the valve seat will not shake between the first magnetic isolation tube and the second magnetic isolation tube, thereby improving the stability of the fixed connection between the valve seat and the first magnetic isolation tube and the second magnetic isolation tube, and at the same time better ensuring the sealing effect of the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of the solenoid valve in some embodiments of the present application is shown when the moving iron blocks the central hole, and the angles between the connecting portion and the first mounting portion and the second mounting portion are both obtuse angles;

[0025] Figure 2 A cross-sectional view of the solenoid valve in some embodiments of the present application is shown when the stationary iron is magnetically attracting the moving iron, and the angles between the connecting portion and the first mounting portion and the second mounting portion are both obtuse angles;

[0026] Figure 3 A partial cross-sectional view showing a right angle between the connecting portion and the first mounting portion and the second mounting portion in some embodiments of the present application is shown;

[0027] Figure 4 A cross-sectional view showing, in some embodiments of the present application, when the movable iron moves toward the valve core and the head abuts against the valve core, the middle portion of the movable iron facing the end surface of the valve core does not extend out of the through hole of the valve seat;

[0028] Figure 5 A schematic diagram shows that in some embodiments of the present application, when the static iron magnetically attracts the moving iron so that the tail abuts against the static iron, the middle end surface of the moving iron facing the valve core is still in the second mounting portion.

[0029] The parts indicated by the numbers in the accompanying drawings are as follows:

[0030] 10. Cavity; 100. First magnetic isolation tube; 110. Stationary iron; 120. Return spring; 200. Valve seat; 210. Through hole; 220. Protrusion; 300. Second magnetic isolation tube; 310. First mounting portion; 320. Second mounting portion; 321. Air hole; 330. Connecting portion; 400. Moving iron; 410. Tail; 411. Mounting hole; 420. Middle portion; 430. Head; 431. Connecting block; 432. Seal; 500. Valve core; 510. Center hole. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a solenoid valve structure for an air suspension. The solenoid valve structure includes a first magnetic isolation tube 100, a second magnetic isolation tube 300, a valve seat 200, a moving iron 400, and a valve core 500. The valve seat 200 has a through hole 210 extending therethrough, giving the valve seat 200 an overall annular shape. The first end of the valve seat 200 extends into and is fixedly connected to the first magnetic isolation tube 100, while the second end of the valve seat 200 extends into and is fixedly connected to the second magnetic isolation tube 300. The valve core 500 is fixedly mounted on the end of the second magnetic isolation tube 300 away from the first magnetic isolation tube 100. The valve core 500 has a central hole 510 extending therethrough. An air hole 321 communicating with the cavity 10 is defined on the circumferential sidewall of the second magnetic isolation tube 300 near the valve core 500. It can be understood that after assembly, the interior of the first magnetic isolation tube 100, the second magnetic isolation tube 300 and the valve seat 200 can form a cavity 10, and the moving iron 400 is arranged in the cavity 10, and the moving iron 400 can be moved in the cavity 10 by external drive; specifically, the moving iron 400 can move back and forth along its axial direction in the cavity 10, and when the moving iron 400 moves toward the valve core 500, when the moving iron 400 abuts against the valve core 500, the moving iron 400 can block the center hole 510 of the valve core 500, thereby making the center hole 510 and the air hole 321 in a non-conductive state, and when the moving iron 400 moves in a direction away from the valve core 500, the moving iron 400 can release the blockage of the center hole 510, thereby making the center hole 510 and the air hole 321 in a conductive state.

[0034] It should be noted that, by arranging the second end of the valve seat 200 to extend into and be fixed in the second magnetic isolation tube 300, the two ends of the valve seat 200 can be respectively sleeved by the first magnetic isolation tube 100 and the second magnetic isolation tube 300, which can better achieve the concealment of the two ends of the valve seat 200, avoid the exposure of the end of the valve seat 200, and further better avoid the collision of the end of the valve seat 200 during transportation or disassembly, and can better improve the stability of the fixed connection between the valve seat 200 and the first magnetic isolation tube 100 and the second magnetic isolation tube 300, thereby ensuring the sealing effect of the cavity 10. At the same time, since the second end of the valve seat 200 is further extended into the second magnetic isolation tube 300, the overall size of the valve seat 200 is expanded, so that the matching surface between the valve seat 200 and the moving iron 400 in the cavity 10 is longer, and the valve seat 200 can have better guidance for the movement of the moving iron 400, and can prevent the moving iron 400 from shaking and tilting due to the influence of the airflow during the movement, thereby better protecting the moving iron 400, preventing the moving iron 400 from wear, and better improving the smoothness of the movement of the moving iron 400.

[0035] Furthermore, a protrusion 220 is provided on the circumferential outer wall of the valve seat 200. After the valve seat 200 is connected and fixed with the first magnetic isolation tube 100 and the second magnetic isolation tube 300, the protrusion 220 can protrude from the outer surface of the solenoid valve. In this state, the first magnetic isolation tube 100 and the second magnetic isolation tube 300 are respectively in contact with the protrusion 220.

[0036] It can be understood that the first magnetic isolation tube 100, the second magnetic isolation tube 300 and the valve seat 200 can be fixedly connected by means of threads, bolts, bonding, welding or interference fit, and while the valve seat 200 is fixedly connected to the first magnetic isolation tube 100 and the second magnetic isolation tube 300, the end of the first magnetic isolation tube 100 facing the second magnetic isolation tube 300 can abut on the protrusion 220, and similarly, the end of the second magnetic isolation tube 300 facing the first magnetic isolation tube 100 can also abut on the protrusion 220, so that the first magnetic isolation tube 100 and the second magnetic isolation tube 300 are fixedly connected. The tube 300 can support the protrusion 220, so that during transportation or disassembly, when the protrusion 220 is touched by the outside world, the abutment between the first magnetic isolation tube 100 and the second magnetic isolation tube 300 can ensure the stability of the protrusion 220, thereby ensuring the stability of the valve seat 200, so that the valve seat 200 will not shake between the first magnetic isolation tube 100 and the second magnetic isolation tube 300, thereby improving the stability of the fixed connection between the valve seat 200 and the first magnetic isolation tube 100 and the second magnetic isolation tube 300, and at the same time better ensuring the sealing effect of the cavity 10.

[0037] In some embodiments, the second magnetic isolation tube 300 can be divided into a first mounting portion 310 and a second mounting portion 320 in a direction away from the first magnetic isolation tube 100. The inner diameter of the first mounting portion 310 is larger than the inner diameter of the second mounting portion 320. When installing the valve seat 200 and the second magnetic isolation tube 300, the second magnetic isolation valve is sleeved and fixed to the second end of the valve seat 200 through the first mounting portion 310, so that the end of the first mounting portion 310 closest to the first magnetic isolation valve abuts the protrusion 220. The valve core 500 is fixedly mounted on the end of the second mounting portion 320 away from the first mounting portion 310, and the air hole 321 is specifically provided on the circumferential side wall of the second mounting portion 320.

[0038] It should be noted that by setting the inner diameter of the first mounting portion 310 to be larger than the inner diameter of the second mounting portion 320, the first mounting portion 310 can better accommodate the extension of the second end of the valve seat 200, thereby better achieving a fixed connection between the second end of the valve seat 200 and the first mounting portion 310, and achieving hidden protection for the second end of the valve seat 200, thereby preventing the second end of the valve seat 200 from being impacted by the outside world. At the same time, it is understandable that the first mounting portion 310 with a larger inner diameter can better meet the space required for the extension of the second end of the valve seat 200, thereby extending the axial dimension of the valve seat 200, thereby extending the mating surface between the valve seat 200 and the movable iron 400, allowing the valve seat 200 to better guide the movable iron 400, improving the stability of the movable iron 400, and thus preventing the movable iron 400 from shaking, causing wear and causing sticking.

[0039] In some embodiments, the second magnetic isolation tube 300 further includes a connecting portion 330 , which is located between the first mounting portion 310 and the second mounting portion 320 , and the first mounting portion 310 and the second mounting portion 320 with different inner diameters are connected through the connecting portion 330 .

[0040] It should be noted that, combined with Figure 1 and Figure 2 As shown, the first mounting portion 310 and the second mounting portion 320 are coaxially arranged, and the angles between the connecting portion 330 and the first mounting portion 310 and the second mounting portion 320 are both obtuse angles, and the second end of the valve seat 200 extends into the connection between the first mounting portion 310 and the connecting portion 330. In some embodiments, Figure 3 As shown, the angles between the connecting portion 330 and the first mounting portion 310 and the second mounting portion 320 can also be right angles, and the second end of the valve seat 200 extends into the connection between the first mounting portion 310 and the connecting portion 330, so that the second end of the valve seat 200 abuts against the end portion where the second mounting portion 320 and the connecting portion 330 are connected.

[0041] It can be understood that, through the above-mentioned arrangement, the length dimension of the valve seat 200 extending into the second magnetic isolation tube 300 is equal to the axial dimension of the first mounting portion 310, so that the second end of the valve seat 200 can be fully fitted with the first mounting portion 310, which can better improve the stability of the fixed installation of the second end of the valve seat 200 in the second magnetic isolation tube 300, thereby ensuring the sealing effect of the cavity 10.

[0042] It is particularly important to note that the connecting portion 330 can not only connect the first mounting portion 310 and the second mounting portion 320, but also guide the airflow. Specifically, when the angles between the connecting portion 330 and the first mounting portion 310 and the second mounting portion 320 are both obtuse angles, the connecting portion 330 can guide the gas to the end of the second end of the valve seat 200. When the angles between the connecting portion 330 and the first mounting portion 310 and the second mounting portion 320 are both right angles, the connecting portion 330 can guide the gas to the end of the second end of the valve seat 200 and / or the inner wall of the first mounting portion 310. Since the center hole 510 and the air hole 321 are both arranged on the second mounting part 320, when gas is passed into the second mounting part 320, the gas can directly act on the end face of the second end of the valve seat 200 and / or the inner wall of the first mounting part 310 along the connecting part 330, and will not directly act on the circumferential side wall of the moving iron 400, so that it can buffer the gas and better avoid the moving iron 400 from being directly impacted by the gas and causing radial shaking, which can better improve the stability of the moving iron 400 and avoid the moving iron 400 from being stuck due to wear due to radial shaking.

[0043] Furthermore, since the valve seat 200 is fixedly connected to the first magnetic isolation tube 100 and the first mounting portion 310 respectively, and the end of the first magnetic isolation tube 100 close to the second magnetic isolation tube 300 abuts against the protrusion 220, the first magnetic isolation tube 100 and the first mounting portion 310 can better support the valve seat 200, thereby better ensuring the stability of the valve seat 200 and preventing the valve seat 200 from being affected by gas impact.

[0044] In some embodiments, the movable iron 400 can be sequentially divided into a tail portion 410, a middle portion 420, and a head portion 430 along the direction from the first magnetic isolation tube 100 to the second magnetic isolation tube 300. The middle portion 420 of the movable iron 400 is disposed within the through-hole 210 of the valve seat 200, the tail portion 410 extends into the first magnetic isolation tube 100, and the head portion 430 extends into the second mounting portion 320. Furthermore, the diameter of the middle portion 420 of the movable iron 400 matches the inner diameter of the through-hole 210 of the valve seat 200, allowing the middle portion 420 of the movable iron 400 to stably move axially within the through-hole 210, thereby effectively preventing radial shaking of the middle portion 420 within the through-hole 210.

[0045] When the moving iron 400 is driven to move toward the direction close to the valve core 500, during this process, the moving iron 400 moves toward the valve core 500 in the through hole 210 of the valve seat 200 through the middle part 420. At the same time, the tail part 410 moves toward the valve core 500 in the first magnetic isolation tube 100, and the head part 430 moves toward the valve core 500 in the second mounting part 320. When the head part 430 moves to abut against the valve core 500, the head part 430 can block the center hole 510 of the valve core 500, so that the center hole 510 and the valve core 500 are in contact. The air hole 321 is in a non-conductive state; when the moving iron 400 is driven to move in a direction away from the valve core 500, during this process, the moving iron 400 moves in a direction away from the valve core 500 in the through hole 210 of the valve seat 200 through the middle part 420. At the same time, the tail part 410 moves in a direction away from the valve core 500 in the first magnetic isolation tube 100, and the head part 430 moves in a direction away from the valve core 500 in the second mounting part 320, thereby separating the head part 430 from the valve core 500, so that the center hole 510 and the air hole 321 are in a conductive state.

[0046] Combine Figure 4 As shown, in some embodiments, when the moving iron 400 moves toward the valve core 500 and the head 430 abuts against the valve core 500, the end face of the middle portion 420 of the moving iron 400 facing the valve core 500 does not extend out of the through hole 210 of the valve seat 200. Specifically, there are two situations. One is that the end face of the middle portion 420 facing the valve core 500 is flush with the end face of the second end of the valve seat 200, and the other is that the end face of the middle portion 420 facing the valve core 500 is still deep in the through hole 210 of the valve seat 200.

[0047] From the above, it can be known that since the second end of the valve seat 200 extends into the second magnetic isolation tube 300, the mating surface between the valve seat 200 and the moving iron 400 is extended. When the moving iron 400 moves toward the valve core 500 to the maximum extent, the middle part 420 of the moving iron 400 facing the valve core 500 can still be in the through hole 210, that is, in the entire process of moving the moving iron 400, the end of the middle part 420 facing the valve core 500 will not move out of the through hole 210, so that the middle part 420 can always be restricted by the through hole 210 of the valve seat 200, ensuring the stability of the middle part 420. When gas enters the second mounting part 320, the gas will not act on the circumferential side wall of the middle part 420, thereby better avoiding the middle part 420 from being affected by the gas and producing radial shaking, which can improve the stability of the overall moving iron 400 and avoid the shaking of the moving iron 400, causing wear and jamming.

[0048] In some embodiments, the radial dimension of the head 430 of the moving iron 400 is matched with the radial dimension of the second mounting portion 320, so that the head 430 of the moving iron 400 can also be restricted to a certain extent by the second mounting portion 320, which can better prevent the head 430 from shaking due to the action of airflow.

[0049] In some embodiments, a stationary iron 110 is fixedly mounted on the end of the first magnetic isolation tube 100 away from the second magnetic isolation tube 300. The stationary iron 110 can be fixed to the first magnetic isolation tube 100 by welding, threading, bolting, bonding, or clamping. When it is necessary to adjust the conductive state between the central hole 510 and the air hole 321, the stationary iron 110 can be energized to generate a magnetic force. The magnetic force of the stationary iron 110 can attract the movable iron 400 to move away from the valve core 500, thereby separating the head 430 from the valve core 500.

[0050] Furthermore, the tail portion 410 of the movable iron 400 is recessed inward to form a mounting hole 411. A return spring 120 is disposed in the mounting hole 411. One end of the return spring 120 abuts against the mounting hole 411, while the other end of the return spring 120 abuts against the first magnetic isolation tube 100 and / or the stationary iron 110. When it is necessary to adjust the conductive state between the central hole 510 and the air hole 321, the stationary iron 110 can be energized to generate a magnetic force. This magnetic force can attract the movable iron 400 to move away from the valve core 500 by compressing the return spring 120, thereby separating the head 430 from the valve core 500. When it is necessary to adjust the center hole 510 and the air hole 321 to a non-conductive state, the power to the static iron 110 can be cut off so that the magnetic force of the static iron 110 disappears and it cannot magnetically attract the moving iron 400. At this time, the reset spring 120 can push the moving iron 400 toward the valve core 500, so that the head 430 of the moving iron 400 can finally re-contact the valve core 500, thereby realizing the blocking of the center hole 510 by the moving iron 400.

[0051] In some embodiments, the head 430 of the moving iron 400 includes a connecting block 431 fixedly connected to the middle part 420, and a sealing member 432 fixedly installed on the connecting block 431. Specifically, the sealing member 432 is a rubber member. The head 430 of the moving iron 400 abuts against the valve core 500 through the sealing member 432. By squeezing the sealing member 432, the sealing member 432 seals the center hole 510.

[0052] Furthermore, the sealing member 432 may be fixed to the connecting block 431 by means of snap connection, bonding, or bolt connection.

[0053] Example 2

[0054] Combine Figure 5As shown, the difference between this embodiment and embodiment 1 is that: when the static iron 110 magnetically attracts the moving iron 400 so that the tail portion 410 abuts against the static iron 110, at this time, the middle portion 420 of the moving iron 400 facing the end face of the valve core 500 is still in the second mounting portion 320, that is, the head portion 430 of the moving iron 400 has a better length, and during the entire movement process of the moving iron 400, the head portion 430 of the moving iron 400 always keeps moving in the second mounting portion 320.

[0055] It can be understood that since the inner diameter of the first mounting part 310 is larger than the inner diameter of the second mounting part 320, and the head 430 of the moving iron 400 is always in the second mounting part 320, when gas enters the second mounting part 320, the head 430 of the moving iron 400 can block the gas to a certain extent, so that only a small amount of gas can enter the second mounting part 320, and the small amount of gas cannot impact the middle part 420 of the moving iron 400, thereby better avoiding radial shaking of the middle part 420 of the moving iron 400, improving the stability of the overall moving iron 400, and avoiding the shaking of the moving iron 400, causing wear and jamming.

[0056] In some embodiments, the radial dimensions of the middle portion 420 of the moving iron 400 are matched with the radial dimensions of the second mounting portion 320 so that the middle portion 420 of the moving iron 400 can partially extend into the second mounting portion 320, thereby better ensuring that the head 430 always moves in the second mounting portion 320.

[0057] In short, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention patent.

Claims

1. A solenoid valve structure for an air suspension, characterized in that: The valve seat comprises a first magnetic isolation tube, a second magnetic isolation tube, and a valve seat; a protrusion is provided on the circumferential outer wall of the valve seat, wherein the first end of the valve seat extends into and is fixed in the first magnetic isolation tube, and the second end extends into and is fixed in the second magnetic isolation tube; In the assembled state, both the first magnetic isolation tube and the second magnetic isolation tube abut against the protrusion.

2. The solenoid valve structure according to claim 1, characterized in that: In a direction away from the first magnetic isolation tube, the second magnetic isolation tube has a first mounting portion and a second mounting portion, the inner diameter of the first mounting portion is larger than the inner diameter of the second mounting portion; the second end of the valve seat extends into and is fixed in the first mounting portion.

3. The solenoid valve structure according to claim 2, characterized in that: The second magnetic isolation tube also includes a connecting portion for connecting the first mounting portion and the second mounting portion, and the angles between the connecting portion and the first mounting portion and the second mounting portion are both obtuse angles or right angles; the second end of the valve seat extends into and is fixed at the connection between the first mounting portion and the connecting portion.

4. The solenoid valve structure according to claim 2, characterized in that: It also includes a moving iron and a valve core having a tail portion, a middle portion, and a head portion; the tail portion extends into the first magnetic isolation tube, the middle portion is inserted into the through hole of the valve seat, and the head portion extends into the second mounting portion; the valve core is fixedly mounted on an end of the second mounting portion away from the first magnetic isolation tube; The moving iron can reciprocate along the axial direction of the cavity formed by the first magnetic isolation tube, the valve seat and the second magnetic isolation tube to achieve the blocking and opening of the central hole of the valve core.

5. The solenoid valve structure according to claim 4, characterized in that: When the head portion abuts against the valve core and seals the central hole, the end surface of the middle portion facing the valve core does not extend out of the through hole.

6. The solenoid valve structure according to claim 5, characterized in that: The size of the head portion matches the size of the second mounting portion.

7. The solenoid valve structure according to claim 4, characterized in that: A static iron is fixedly mounted on the end of the first magnetic isolation tube away from the second magnetic isolation tube, and the static iron is used to drive the moving iron to move in the cavity.

8. The solenoid valve structure according to claim 7, characterized in that: When the tail portion abuts against the stationary iron, the end surface of the middle portion facing the valve core is located in the second mounting portion.

9. The solenoid valve structure according to claim 8, characterized in that: The size of the middle portion matches the size of the second mounting portion.

10. The solenoid valve structure according to claim 6 or 9, characterized in that: The head includes a connecting block and a sealing member fixedly mounted on the connecting block. When the movable iron moves toward the valve core, the head abuts against the valve core through the sealing member to seal the central hole.

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