Electromagnetic valve

By introducing a sealing plate, an iron core assembly and a muffler into the solenoid valve, the problems of single output and high noise of the solenoid valve are solved, and the effects of multiple output combinations and noise reduction are achieved.

CN223344835UActive Publication Date: 2025-09-16ZHEJIANG ZHUORUI CONTROL SYST CO LTD
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Patent Information

Application Number
CN202521582069.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-28
Publication Date
2025-09-16
Estimated Expiration
2035-07-28

AI Technical Summary

Technical Problem

The existing solenoid valves have a relatively single output when in use, cannot be flexibly combined, are noisy, and are difficult to meet diverse needs.

Method used

A solenoid valve is designed. By arranging a sealing plate and a solenoid valve body on the shell, combining an iron core assembly and a variety of outlet valve assemblies, multiple output modes are achieved, and noise is reduced by a muffler.

Benefits of technology

It realizes a variety of output combinations of solenoid valves, has a wide range of applications, is easy to operate, and effectively reduces noise.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an electromagnetic valve which comprises a shell and an electromagnetic valve body, a first installation hole, a second installation hole and a third installation hole are formed in the upper surface of the shell, an air inlet valve assembly is arranged in the first installation hole, and a first air outlet valve assembly and a second air outlet valve assembly are arranged in the second installation hole and the third installation hole respectively. According to the electromagnetic valve, the sealing plate and the electromagnetic valve body are arranged on the shell, the iron core assembly is arranged at the bottom of the electromagnetic valve body, the sealing plate and the electromagnetic valve body are matched with each other to achieve on-off of the electromagnetic valve, and the electromagnetic valve body is powered on through the power jack; when the first coil connecting piece, the second coil connecting piece and the fourth coil connecting piece of the electromagnetic valve body are electrified at the same time, the first coil, the second coil and the fourth coil are electrified at the same time, air enters the cavity of the shell from the air inlet valve assembly, the electromagnetic valve is output through the first air outlet valve assembly, and operation is easy and convenient; different output requirements of the electromagnetic valve are met through various combinations, and the application range is wide.
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Description

Technical Field

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

[0002] Solenoid valves are electromagnetically controlled industrial devices. They are fundamental automation components used to control fluids and are classified as actuators. They are used in industrial control systems to adjust the direction, flow, speed, and other parameters of a medium. Solenoid valves can be used with various circuits to achieve the desired control, ensuring both precision and flexibility.

[0003] With the development and progress of technology, people's current demand for solenoid valves is gradually increasing. However, when using solenoid valves, due to their relatively single output, they cannot flexibly combine outputs according to people's needs and cannot adapt well to people's needs. In addition, solenoid valves make a lot of noise during use.

[0004] Therefore, it is necessary to provide a solenoid valve to solve the above technical problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a solenoid valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solenoid valve, comprising a shell and a solenoid valve body, wherein a first mounting hole, a second mounting hole and a third mounting hole are provided on the upper surface of the shell, an intake valve assembly is provided in the first mounting hole, a first exhaust valve assembly and a second exhaust valve assembly are provided in the second mounting hole and the third mounting hole respectively, a bottom plate is provided at the bottom of the shell, a first iron gasket is provided at a lower position in the first mounting hole, a first spring is provided between the first iron gasket and the bottom plate, a second iron gasket is provided at a lower position in the second mounting hole, a second spring is provided between the second iron gasket and the bottom plate, a A third iron gasket, a third spring is arranged between the third iron gasket and the bottom plate, a silencer hole and an exhaust hole are respectively provided on both sides of the shell, a muffler is provided in the silencer hole, a sealing plate is provided on the top of the shell, an iron core assembly is provided on the top of the sealing plate, the iron core assembly includes a base and an iron core assembly, the base is provided on the top of the sealing plate, an electromagnetic valve body is provided on the base, three fourth mounting holes are provided on the surface of the electromagnetic valve body, the three iron core assemblies are respectively inserted into the three fourth mounting holes, a power socket is provided on the side wall of the electromagnetic valve body, and the first coil connecting piece, the second coil connecting piece, the third coil connecting piece and the fourth coil connecting piece are provided in the power socket.

[0007] As a preferred technical solution of the present invention, the first mounting hole, the second mounting hole and the third mounting hole all pass through the shell, and the cross-sectional structures of the first mounting hole, the second mounting hole and the third mounting hole are all in the shape of an "I".

[0008] As an optimal technical solution of the present utility model, a plurality of third self-tapping screws are arranged on the base plate, the threaded portion of the third self-tapping screws is screwed into the bottom of the shell, and a first sealing gasket is embedded in the bottom of the shell, and the first sealing gasket is located at the connection between the shell and the base plate.

[0009] As a preferred technical solution of the present invention, the intake valve assembly includes an intake valve, which is arranged in a first mounting hole. A fifth spring is sleeved on the outer circumferential surface of the intake valve. Two grooves are provided on the outer circumferential surface of the intake valve, and a second O-ring and a third O-ring are respectively sleeved in the two grooves.

[0010] As a preferred technical solution of the present invention, the first outlet valve assembly includes an outlet valve, the outlet valve is arranged in the second mounting hole, and a fourth O-ring and a fifth O-ring are sleeved on the outer circumferential surface of the outlet valve.

[0011] As an optimal technical solution of the present utility model, the silencer hole is communicated with the first mounting hole, the exhaust hole is communicated with the first mounting hole, the second mounting hole and the third mounting hole, the silencer includes a silencer shell, the silencer shell is clamped in the silencer hole, a filter screen and a silencer inner core are provided in the silencer shell, an air blocking head is provided at the end of the exhaust hole, an open pin is inserted in the shell, and the open pin is connected and fixed to the external components.

[0012] As an optimal technical solution of the present invention, a third sealing gasket is embedded in the bottom of the sealing plate, and the third sealing gasket is located at the connection between the sealing plate and the shell. Second self-tapping screws are provided at the four corners of the base, and the threaded portion of the second self-tapping screw passes through the base and the sealing plate in sequence and is screwed into the shell.

[0013] As an optimal technical solution of the present utility model, there are three iron core assemblies, and the iron core assembly includes an outer sleeve, a static iron core is inserted into the top of the outer sleeve, a first O-ring is clamped on the outer circumference of the outer sleeve, a moving iron core is slidably arranged at the bottom of the outer sleeve, and a fourth spring is arranged between the bottom of the moving iron core and the bottom of the outer sleeve. The fourth spring is pagoda-shaped, and the fourth spring is sleeved on the outer circumference of the moving iron core. The upper and lower ends of the moving iron core are provided with slots, and a rubber block is clamped in the slot.

[0014] As an optimal technical solution of the present invention, a second sealing gasket is embedded in the upper surface of the solenoid valve body, a solenoid valve cover is provided on the top of the solenoid valve body, the second sealing gasket is located at the connection between the solenoid valve body and the solenoid valve cover, and six first self-tapping screws are provided on the solenoid valve cover. The threaded portion of the first self-tapping screw passes through the solenoid valve cover, the solenoid valve body, the base and the sealing plate in sequence and is screwed into the shell.

[0015] As a preferred technical solution of the present invention, the first spring is located in the first mounting hole, the second spring is located in the second mounting hole, and the third spring is located in the third mounting hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. A solenoid valve described in the present invention realizes the on and off of the solenoid valve by arranging a sealing plate and a solenoid valve body on the shell, and arranging an iron core assembly at the bottom of the solenoid valve body to cooperate with each other. The solenoid valve body is energized through the power jack. When the first coil connecting piece, the second coil connecting piece and the fourth coil connecting piece of the solenoid valve body are energized at the same time, the first coil, the second coil and the fourth coil are energized at the same time. When the static iron core is energized, a magnetic force is generated to attract the moving iron core. The moving iron core overcomes the elastic force of the fourth spring and slides up to be attracted to the static iron core, thereby realizing the circulation of the medium. Air is sucked into the cavity of the shell from the intake valve assembly, and the solenoid valve is output through the first outlet valve assembly. When the first coil connecting piece, the third coil connecting piece and the fourth coil connecting piece of the solenoid valve body are energized at the same time, the first coil, the second coil and the fourth coil are energized When energized, the first coil, the third coil and the fourth coil are energized at the same time, air is drawn into the cavity of the shell from the intake valve assembly, and the solenoid valve outputs air through the second outlet valve assembly. When the first coil connecting piece, the second coil connecting piece, the third coil connecting piece and the fourth coil connecting piece of the solenoid valve body are energized at the same time, the first coil, the second coil, the third coil and the fourth coil are energized at the same time, air is drawn into the cavity of the shell from the intake valve assembly, and the solenoid valve outputs air through the first outlet valve assembly and the second outlet valve assembly. When the first coil connecting piece and the fourth coil connecting piece of the solenoid valve body are de-energized, the first coil and the fourth coil are de-energized, and the air in the shell cavity is discharged through the exhaust hole for pressure relief. The operation is simple and convenient, and a variety of combinations can meet different output requirements of the solenoid valve, and it has a wide range of applications.

[0018] 2. The solenoid valve described in the utility model uses a muffler to muffle the solenoid valve during its operation to reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is an axonometric drawing of the overall structure of the utility model;

[0022] Figure 3 This is a three-dimensional exploded schematic diagram of the overall structure of the utility model;

[0023] Figure 4 It is a three-dimensional schematic diagram of the shell structure of the utility model;

[0024] Figure 5 This is an axonometric drawing of the shell structure of the utility model;

[0025] Figure 6 This is a three-dimensional schematic diagram of the solenoid valve body structure of the utility model;

[0026] Figure 7 This is a three-dimensional schematic diagram of the muffler structure of the utility model;

[0027] Figure 8 It is a three-dimensional schematic diagram of the core assembly structure of the utility model;

[0028] Figure 9 It is a three-dimensional schematic diagram of the core assembly structure of the utility model;

[0029] Figure 10 It is a three-dimensional schematic diagram of the intake valve assembly structure of the utility model;

[0030] Figure 11 This is a three-dimensional schematic diagram of the structure of the first outlet valve assembly of the utility model;

[0031] Figure 12 It is the main view of the utility model;

[0032] Figure 13 It is a schematic diagram of the working principle of the solenoid valve coil of the utility model.

[0033] In the figure: 1. Shell; 101. First mounting hole; 102. Second mounting hole; 103. Third mounting hole; 104. Silencer hole; 105. Exhaust hole; 2. Solenoid valve body; 201. Fourth mounting hole; 202. Power jack; 203. First coil connecting piece; 204. Second coil connecting piece; 205. Third coil connecting piece; 206. Fourth coil connecting piece; 3. Muffler; 31. Silencer shell; 32. Filter; 33. Silencer inner core; 4. Sealing plate; 5. Core assembly; 51. Base; 52. Core assembly; 521. Jacket; 522. Static core; 523. Moving core; 5231. Slot; 524. Fourth spring; 525. First O O-ring; 526, rubber block; 6, intake valve assembly; 61, intake valve; 62, fifth spring; 63, second O-ring; 64, third O-ring; 7, first outlet valve assembly; 71, outlet valve; 72, fourth O-ring; 73, fifth O-ring; 8, second outlet valve assembly; 9, base plate; 10, solenoid valve cover; 11, first spring; 12, first iron gasket; 13, second spring; 14, second iron gasket; 15, third spring; 16, third iron gasket; 17, cotter pin; 18, first sealing gasket; 19, second sealing gasket; 20, first self-tapping screw; 21, second self-tapping screw; 22, third self-tapping screw; 23, air plug; 24, third sealing gasket. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention with reference to the accompanying drawings. In the process, to ensure clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0035] In addition, the following terms are defined based on the functions of the present invention and may vary depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire content of this specification.

[0036] like Figures 1 to 13As shown, a solenoid valve includes a housing 1 and a solenoid valve body 2. The upper surface of the housing 1 is provided with a first mounting hole 101, a second mounting hole 102 and a third mounting hole 103. The first mounting hole 101, the second mounting hole 102 and the third mounting hole 103 all pass through the housing 1. The cross-sectional structures of the first mounting hole 101, the second mounting hole 102 and the third mounting hole 103 are all "I"-shaped. The first mounting hole 101 is provided with an intake valve assembly 6, and the second mounting hole 102 and the third mounting hole 103 are respectively provided with a first outlet valve assembly. Part 7 and a second outlet valve assembly 8, the intake valve assembly 6 includes an intake valve 61, the intake valve 61 is arranged in the first mounting hole 101, and a fifth spring 62 is sleeved on the outer circumference of the intake valve 61, and two grooves are provided on the outer circumference of the intake valve 61, and a second O-ring 63 and a third O-ring 64 are respectively sleeved in the two grooves, the first outlet valve assembly 7 includes an outlet valve 71, the outlet valve 71 is arranged in the second mounting hole 102, and a fourth O-ring 72 and a fifth O-ring 73 are sleeved on the outer circumference of the outlet valve 71.

[0037] like Figure 3 As shown, a bottom plate 9 is provided at the bottom of the shell 1, and a plurality of third self-tapping screws 22 are provided on the bottom plate 9. The threaded portion of the third self-tapping screw 22 is screwed into the bottom of the shell 1. A first iron gasket 12 is provided at a lower position in the first mounting hole 101, and a first spring 11 is provided between the first iron gasket 12 and the bottom plate 9. The first spring 11 is located in the first mounting hole 101, and a second iron gasket 14 is provided at a lower position in the second mounting hole 102. A second spring 13 is provided between the second iron gasket 14 and the bottom plate 9, and the second spring 13 is located in the second mounting hole 102. A third iron gasket 16 is provided at a lower position in the third mounting hole 103, and a third spring 15 is provided between the third iron gasket 16 and the bottom plate 9. The third spring 15 is located in the third mounting hole 103. A first sealing gasket 18 is embedded in the bottom of the shell 1.

[0038] like Figure 7 As shown, a silencer hole 104 and an exhaust hole 105 are respectively provided on both sides of the shell 1, the silencer hole 104 is communicated with the first mounting hole 101, and the exhaust hole 105 is communicated with the first mounting hole 101, the second mounting hole 102 and the third mounting hole 103. A silencer 3 is provided in the silencer hole 104, and the silencer 3 includes a silencer shell 31, which is snapped into the silencer hole 104, and a filter screen 32 and a silencer inner core 33 are provided in the silencer shell 31. An air blocking head 23 is provided at the end of the exhaust hole 105, and an open pin 17 is inserted in the shell 1, which is connected and fixed to external components through the open pin 17.

[0039] like Figure 8and Figure 9 As shown, a sealing plate 4 is provided on the top of the shell 1, a third sealing gasket 24 is embedded in the bottom of the sealing plate 4, and an iron core assembly 5 is provided on the top of the sealing plate 4. The iron core assembly 5 includes a base 51 and an iron core assembly 52. ​​The base 51 is provided on the top of the sealing plate 4. Second self-tapping screws 21 are provided at the four corners of the base 51. The threaded portion of the second self-tapping screw 21 passes through the base 51 and the sealing plate 4 in sequence and is screwed into the shell 1. The iron core assembly 52 is provided with three, and the iron core assembly 52 includes a jacket 521. A static iron core 522 is inserted into the top of the jacket 521. A first O-ring 525 is clamped on the outer circumference of the jacket 521. 21 is provided with a moving iron core 523 sliding at the bottom, and a fourth spring 524 is provided between the bottom of the moving iron core 523 and the bottom of the outer sleeve 521. The fourth spring 524 is pagoda-shaped and is sleeved on the outer circumference of the moving iron core 523. The upper and lower ends of the moving iron core 523 are provided with a card slot 5231, and a rubber block 526 is clamped in the card slot 5231. In the initial state, the moving iron core 523 moves downward to the maximum displacement under the action of the fourth spring 524. When the static iron core 522 is energized, a magnetic force is generated to adsorb the moving iron core 523. The moving iron core 523 overcomes the elastic force of the fourth spring 524 and slides upward to be attracted to the static iron core 522, thereby realizing the circulation of the medium.

[0040] like Figure 12 and Figure 13 As shown, the base 51 is provided with an electromagnetic valve body 2, and the surface of the electromagnetic valve body 2 is provided with three fourth mounting holes 201, and the three core assemblies 52 are respectively plugged into the three fourth mounting holes 201, and the side wall of the electromagnetic valve body 2 is provided with a power socket 202, and the power socket 202 is provided with a first coil connecting piece 203, a second coil connecting piece 204, a third coil connecting piece 205 and a fourth coil connecting piece 206. 06 is electrically connected to an external power supply for powering on, and the first coil connecting piece 203, the second coil connecting piece 204, the third coil connecting piece 205 and the fourth coil connecting piece 206 are combined to power on to realize different opening and closing of the solenoid valve, a second sealing gasket 19 is embedded in the upper surface of the solenoid valve body 2, a solenoid valve cover 10 is provided on the top of the solenoid valve body 2, and six first self-tapping screws 20 are provided on the solenoid valve cover 10, and the threaded portion of the first self-tapping screw 20 passes through the solenoid valve cover 10, the solenoid valve body 2, the base 51 and the sealing plate 4 in sequence and is screwed into the shell 1.

[0041] The specific implementation method is as follows: a sealing plate 4 and a solenoid valve body 2 are provided on the shell 1, and an iron core assembly 5 is provided at the bottom of the solenoid valve body 2 to cooperate with each other to realize the on and off of the solenoid valve, and the solenoid valve body 2 is energized through the power jack 202. When the first coil connecting piece 203, the second coil connecting piece 204 and the fourth coil connecting piece 206 of the solenoid valve body 2 are energized at the same time, the first coil, the second coil and the fourth coil are energized at the same time, and the static iron core 522 generates magnetic force to adsorb the moving iron core 523 when energized. The moving iron core 523 overcomes the elastic force of the fourth spring 524 and slides up to be attracted to the static iron core 522, thereby realizing the circulation of the medium, and air is sucked into the cavity of the shell 1 from the intake valve assembly 6, and the solenoid valve is output through the first outlet valve assembly 7. When the first coil connecting piece 203, the third coil connecting piece 205 and the fourth coil connecting piece 206 of the solenoid valve body 2 are energized at the same time, the first coil, the third coil and the fourth coil are energized at the same time. The four coils are energized at the same time, and air is drawn into the cavity of the shell 1 from the intake valve assembly 6, and the solenoid valve outputs air through the second outlet valve assembly 8. When the first coil connecting piece 203, the second coil connecting piece 204, the third coil connecting piece 205 and the fourth coil connecting piece 206 of the solenoid valve body 2 are energized at the same time, the first coil, the second coil, the third coil and the fourth coil are energized at the same time, and air is drawn into the cavity of the shell 1 from the intake valve assembly 6, and the solenoid valve outputs air through the first outlet valve assembly 7 and the second outlet valve assembly 8. When the first coil connecting piece 203 and the fourth coil connecting piece 206 of the solenoid valve body 2 are de-energized, the first coil and the fourth coil are de-energized, and the air in the cavity of the shell 1 is discharged and depressurized through the exhaust hole 105. The operation is simple and convenient, and a variety of combinations can meet different output requirements of the solenoid valve. It has a wide range of applications. During the operation of the solenoid valve, it is silenced by the muffler 3 to reduce noise.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A solenoid valve, comprising a housing (1) and a solenoid valve body (2), wherein the upper surface of the housing (1) is provided with a first mounting hole (101), a second mounting hole (102) and a third mounting hole (103), characterized in that: An air inlet valve assembly (6) is provided in the first mounting hole (101), a first air outlet valve assembly (7) and a second air outlet valve assembly (8) are provided in the second mounting hole (102) and the third mounting hole (103), respectively; a bottom plate (9) is provided at the bottom of the shell (1); a first iron gasket (12) is provided at a lower position in the first mounting hole (101), a first spring (11) is provided between the first iron gasket (12) and the bottom plate (9); a second iron gasket (14) is provided at a lower position in the second mounting hole (102), a second spring (13) is provided between the second iron gasket (14) and the bottom plate (9); a third iron gasket (16) is provided at a lower position in the third mounting hole (103), a third spring (15) is provided between the third iron gasket (16) and the bottom plate (9); silencers are provided on both sides of the shell (1). A hole (104) and an exhaust hole (105) are provided, a muffler (3) is provided in the muffler hole (104), a sealing plate (4) is provided on the top of the shell (1), an iron core assembly (5) is provided on the top of the sealing plate (4), the iron core assembly (5) comprises a base (51) and an iron core assembly (52), the base (51) is provided on the top of the sealing plate (4), an electromagnetic valve body (2) is provided on the base (51), three fourth mounting holes (201) are provided on the surface of the electromagnetic valve body (2), the three iron core assemblies (52) are respectively plugged into the three fourth mounting holes (201), a power socket (202) is provided on the side wall of the electromagnetic valve body (2), a first coil connecting piece (203), a second coil connecting piece (204), a third coil connecting piece (205) and a fourth coil connecting piece (206) are provided in the power socket (202).

2. The solenoid valve according to claim 1, characterized in that: The first mounting hole (101), the second mounting hole (102) and the third mounting hole (103) all pass through the housing (1); the cross-sectional structures of the first mounting hole (101), the second mounting hole (102) and the third mounting hole (103) are all in the shape of an "I".

3. The solenoid valve according to claim 1, characterized in that: A plurality of third self-tapping screws (22) are provided on the base plate (9), and the threaded portions of the third self-tapping screws (22) are screwed into the bottom of the housing (1). A first sealing gasket (18) is embedded in the bottom of the housing (1), and the first sealing gasket (18) is located at the connection between the housing (1) and the base plate (9).

4. The solenoid valve according to claim 1, characterized in that: The intake valve assembly (6) comprises an intake valve (61), the intake valve (61) being arranged in a first mounting hole (101), a fifth spring (62) being sleeved on the outer circumferential surface of the intake valve (61), and two grooves being provided on the outer circumferential surface of the intake valve (61), a second O-ring (63) and a third O-ring (64) being sleeved in the two grooves respectively.

5. The solenoid valve according to claim 1, characterized in that: The first outlet valve assembly (7) comprises an outlet valve (71), the outlet valve (71) is arranged in the second mounting hole (102), and a fourth O-ring (72) and a fifth O-ring (73) are sleeved on the outer circumference of the outlet valve (71).

6. The solenoid valve according to claim 1, characterized in that: The silencer hole (104) is in communication with the first mounting hole (101), and the exhaust hole (105) is in communication with the first mounting hole (101), the second mounting hole (102), and the third mounting hole (103). The muffler (3) comprises a silencer shell (31), which is snap-fitted into the silencer hole (104). A filter screen (32) and a silencer inner core (33) are provided in the silencer shell (31). An air blocking head (23) is provided at the end of the exhaust hole (105). A cotter pin (17) is inserted into the shell (1), and the cotter pin (17) is connected and fixed to external components.

7. The solenoid valve according to claim 1, characterized in that: A third sealing gasket (24) is embedded in the bottom of the sealing plate (4), and the third sealing gasket (24) is located at the connection between the sealing plate (4) and the shell (1). Second self-tapping screws (21) are provided at the four corners of the base (51), and the threaded portion of the second self-tapping screw (21) passes through the base (51) and the sealing plate (4) in sequence and is screwed into the shell (1).

8. The solenoid valve according to claim 1, characterized in that: The iron core assembly (52) is provided with three, and the iron core assembly (52) includes an outer sleeve (521), a static iron core (522) is inserted into the top of the outer sleeve (521), a first O-ring (525) is clamped on the outer circumference of the outer sleeve (521), a moving iron core (523) is slidably provided at the bottom of the outer sleeve (521), a fourth spring (524) is provided between the bottom of the moving iron core (523) and the bottom of the outer sleeve (521), the fourth spring (524) is pagoda-shaped, and the fourth spring (524) is sleeved on the outer circumference of the moving iron core (523), and a clamping groove (5231) is provided at both the upper and lower ends of the moving iron core (523), and a rubber block (526) is clamped in the clamping groove (5231).

9. The solenoid valve according to claim 1, characterized in that: A second sealing gasket (19) is embedded in the upper surface of the solenoid valve body (2), and a solenoid valve cover (10) is provided on the top of the solenoid valve body (2). The second sealing gasket (19) is located at the connection between the solenoid valve body (2) and the solenoid valve cover (10). Six first self-tapping screws (20) are provided on the solenoid valve cover (10), and the threaded parts of the first self-tapping screws (20) pass through the solenoid valve cover (10), the solenoid valve body (2), the base (51) and the sealing plate (4) in sequence and are screwed into the housing (1).

10. The solenoid valve according to claim 1, characterized in that: The first spring (11) is located in the first mounting hole (101), the second spring (13) is located in the second mounting hole (102), and the third spring (15) is located in the third mounting hole (103).