Solenoid valve and electric control system with same

Abstract

The utility model provides an electromagnetic valve and an electric control system with the electromagnetic valve, and the electromagnetic valve comprises a valve body and a valve core, an exhaust port is formed in the valve body; a sealing piece is arranged at the first end of the valve element and comprises a mounting block and a boss, one end of the mounting block is connected with the first end of the valve element, the other end of the mounting block is connected with the boss, and the valve element is movably arranged relative to the exhaust port so that the boss can seal or open the exhaust port. The mounting block and the boss jointly act on the exhaust port in the valve body, and the exhaust port is sealed or opened through movement of the boss.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric control system, concretely relates to an electromagnetic valve and an electric control system with the electromagnetic valve. BACKGROUND

[0002] The electric control air suspension system (ECAS) comprises a detection device height sensor, an electronic control unit (ECU), an actuator electromagnetic valve and the like. The ECAS system adjusts the vehicle body height, suspension stiffness and damping through air springs and shock absorbers, and is suitable for various operating states of the vehicle. The electromagnetic valve is the "hand and foot" of the automobile electric control system, and plays a key role in the control of the ECAS electric control air suspension system.

[0003] The electromagnetic valve is used for controlling fluid flow and flow rate (for the functions of charging, discharging, locking the air pressure of the pipeline of the air suspension and the like). The electromagnetic valve mainly comprises a valve core, an armature, an electromagnetic coil, a valve body, a spring and the like. When the coil is powered on or powered off, the coil magnetic field generates a magnetic force on the magnet, which overcomes the elastic force of the spring, generates an electromagnetic force to drive the valve core to move, and realizes the closing or opening of the valve body. However, the existing electromagnetic valve has the problem that the valve core cannot effectively seal the exhaust port, resulting in poor air tightness of the electromagnetic valve. SUMMARY

[0004] The utility model provides an electromagnetic valve and an electric control system with the electromagnetic valve, which can solve the technical problem of poor air tightness of the existing electromagnetic valve due to the problem that the valve core cannot effectively seal the exhaust port.

[0005] The utility model provides an electromagnetic valve, which comprises a valve body and a valve core.

[0006] An exhaust port is arranged on the valve body.

[0007] A sealing element is arranged at the first end of the valve core, and the sealing element comprises a mounting block and a boss. One end of the mounting block is connected with the first end of the valve core, and the other end of the mounting block is connected with the boss. The valve core is movably arranged relative to the exhaust port, so that the boss seals the exhaust port or opens the exhaust port.

[0008] In some embodiments, a flange is arranged at the first end of the valve core, and the flange is arranged to be inwardly foldable. The flange is connected with the mounting block and / or the boss.

[0009] In some embodiments, the radial width of the mounting block is greater than the radial width of the boss, a stepped structure is formed between the mounting block and the boss, and the flange is overlapped with the end face of the stepped structure.

[0010] In some embodiments, a sleeve assembly is further included, the sleeve assembly comprising a sleeve, a spring and a suction assembly, a first end of the sleeve being connected with the valve body, a second end of the sleeve being provided with the suction assembly; the valve core is arranged in the sleeve, a second end of the valve core being provided with the spring, an end of the spring away from the valve core being connected with the suction assembly, the suction assembly being used for sucking the valve core to move in the sleeve.

[0011] In some embodiments, the suction assembly comprises a coil and a suction terminal, the coil being arranged on an outer wall of the second end of the sleeve, the suction terminal being connected with the second end of the sleeve, and the end of the spring away from the valve core being connected with the suction terminal.

[0012] In some embodiments, an outer wall of the first end of the sleeve is provided with a mounting plate, the mounting plate being connected with an outer wall of the valve body away from an end surface of the sleeve, a recess is arranged on the valve body, the first end of the valve core extends into the recess, and an inner wall of the recess is provided with the exhaust port.

[0013] In some embodiments, the exhaust port is provided with an extension pipe extending to the recess, the height of the extension pipe is 1mm, the height of the convex block is 1mm, the convex block is a cylinder, the diameter of the convex block is smaller than the diameter of the extension pipe, and the convex block extends into the extension pipe.

[0014] In some embodiments, the sealing member is a rubber plug, and the material of the sealing member is EPDM.

[0015] In some embodiments, the material of the valve core is 0Cr16Si2PbS.

[0016] An electric control system comprises a solenoid valve, and the solenoid valve is the solenoid valve described above.

[0017] The solenoid valve and the electric control system having the solenoid valve have the following beneficial effects.

[0018] The main role of the sealing element is to ensure that the valve can completely seal the exhaust port in the closed state, prevent gas leakage, the first end of the mounting block is connected with the valve core, the boss protrudes from the end face of the mounting block, and the mounting block and the boss are part of the sealing element, which jointly acts on the exhaust port on the valve body, and the sealing or opening of the exhaust port is realized through the movement of the boss, and the setting ensures that the valve can completely seal the exhaust port when being closed, prevents fluid leakage, and thus guarantees the sealing property of the system. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other embodiments can be derived from the provided drawings without creative labor.

[0020] Figure 1 It is a schematic view of the valve core of the embodiment of the present application.

[0021] Figure 2 It is a schematic view of the flange of the embodiment of the present application.

[0022] Figure 3 It is a schematic view of the sealing element of the embodiment of the present application.

[0023] Figure 4 It is a schematic view of the valve body and the valve core of the embodiment of the present application.

[0024] Figure 5 It is a schematic view of the sleeve assembly of the embodiment of the present application.

[0025] The drawings: 1-valve body; 101-exhaust port; 102-groove; 103-inlet; 104-outlet; 2-valve core; 201-mounting chamber; 3-sealing element; 301-mounting block; 302-boss; 4-flange; 5-sleeve assembly; 501-sleeve; 502-spring; 503-suction assembly; 531-coil; 532-suction terminal; 504-mounting plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is merely illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0028] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0029] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the present application.

[0030] In combination with reference to Figure 1 and 2As shown, according to the embodiment of the utility model, provide a kind of electromagnetic valve, it includes valve body 1 and valve core 2;Valve body 1 is provided with exhaust port 101;The first end of valve core 2 is provided with sealing element 3, sealing element 3 includes mounting block 301 and boss 302, one end of mounting block 301 is connected with the first end of valve core 2, the other end of mounting block 301 is connected with boss 302, valve core 2 is movably arranged relative to exhaust port 101, to make boss 302 seal exhaust port 101 or open exhaust port 101.

[0031] Specifically, when the electromagnetic valve needs to be opened, the valve core 2 moves and gradually moves away from the exhaust port 101, as the valve core 2 moves, the boss 302 extends from the exhaust port 101, and the exhaust port 101 is opened, thereby realizing the opening of the electromagnetic valve; when the electromagnetic valve needs to be closed, the valve core 2 moves and gradually approaches the exhaust port 101 until the boss 302 extends into the exhaust port 101, sealing the exhaust port 101, at which time the electromagnetic valve is in a closed state.

[0032] In this embodiment, the main function of the sealing element 3 is to ensure that the valve can completely seal the exhaust port 101 in the closed state, preventing gas leakage. The first end of the valve core 2 is connected to the mounting block 301, and the boss 302 protrudes from the end surface of the mounting block 301. The mounting block 301 and the boss 302, as part of the sealing element 3, jointly act on the exhaust port 101 on the valve body 1, and the sealing or opening of the exhaust port 101 is realized by the movement of the boss 302. This arrangement ensures that the valve can completely seal the exhaust port 101 when closed, preventing fluid leakage and ensuring the sealing of the system. In addition, the movement of the boss 302 can accurately control the opening and closing state of the exhaust port 101, which is very important for application scenarios that require precise control of fluid flow. By extending and retracting the boss 302, precise control of the fluid passage can be achieved. The mounting block 301 provides stable connection and support for the boss 302, ensuring that the boss 302 can stably contact the exhaust port 101 during the movement of the valve core 2, reducing the risk of sealing failure caused by vibration or pressure changes. Moreover, the arrangement of the boss 302 and the mounting block 301 helps to improve the durability of the sealing element 3, reducing wear caused by frequent opening and closing. Through reasonable material selection and structural arrangement, the service life of the sealing element 3 can be prolonged, reducing maintenance costs.

[0033] As a specific embodiment, the valve core 2 is provided with a mounting chamber 201, and the mounting block 301 is installed in the mounting chamber 201.

[0034] For reference Figures 1 to 3 As shown, the first end of the valve core 2 is provided with a flange 4, which is inwardly foldable. The flange 4 is connected to the mounting block 301 and / or the boss 302.

[0035] Specifically, the valve core 2 and the sealing element 3 are in a split structure, so the stability of the connection between the sealing element 3 and the valve core 2 needs to be considered. In this embodiment, after the mounting block 301 is installed in the valve core 2, specifically after the mounting block 301 is installed in the mounting groove 102, the flange 4 is folded inward. After the flange 4 is folded, it can be connected with the mounting block 301 and the boss 302. According to the structural characteristics of the flange 4, the flange 4 can be connected with the mounting block 301 and the boss 302 at the same time. Specifically, the outer wall of the mounting block 301 and the boss 302 can be provided with a groove or a clamping block. The split structure of the valve core 2 and the sealing element 3 requires a reliable connection method, and the setting of the flange 4 provides a simple and effective connection means. During assembly, the mounting block 301 can be installed in the mounting groove 102 of the valve core 2, and then the flange 4 is folded inward to achieve connection. Such a setting simplifies the assembly process and facilitates subsequent maintenance and replacement.

[0036] In this embodiment, compared with directly installing the mounting block 301 into the mounting groove 102, the setting of the flange 4 makes the connection between the valve core 2 and the sealing element 3 (including the mounting block 301 and the boss 302) more stable. By bending the flange 4 inward, it can ensure that the mounting block 301 or the boss 302 is more firmly connected with the valve core 2, reducing the loosening of the connection caused by vibration or pressure changes during the movement of the valve core 2. The flange 4 can be connected with the mounting block 301 and the boss 302, which helps to improve the sealing performance between the sealing element 3 and the valve core 2, ensuring that the exhaust port 101 can be completely sealed when the valve is closed, preventing fluid leakage. The flange 4 can be connected with the mounting block 301 and the boss 302 at the same time, or connected with one of them, which makes the valve core 2 flexible to adjust according to different needs and working conditions, to adapt to different application scenarios. In addition, the presence of the flange 4 increases the structural strength of the valve core 2, especially in the case of high pressure or frequent operation, the flange 4 can provide additional support to reduce deformation or damage of the valve core 2.

[0037] For reference Figures 1 to 3 As shown, the radial width of the mounting block 301 is greater than the radial width of the boss 302, forming a stepped structure between the mounting block 301 and the boss 302, and the flange 4 overlaps the end face of the stepped structure.

[0038] In this embodiment, in combination with the characteristics of the inward folding of the flange 4, a step structure is formed between the mounting block 301 and the boss 302, so that the flange 4 can be overlapped with the mounting block 301, which can increase the connection strength between the valve core 2 and the sealing element 3. The inward folding of the flange 4 makes the connection between the mounting block 301, the boss 302 and the valve core 2 more firm. Moreover, the step structure and the flange 4 can help to form a better seal between the valve core 2 and the sealing element 3. The flange 4 can be tightly overlapped with the end face of the step structure, which ensures that the exhaust port 101 can be completely sealed when the valve is closed, preventing fluid leakage. The step structure between the mounting block 301 and the boss 302 provides additional structural stability, especially under high pressure or frequent operation. The step structure and the flange 4 can provide additional support, reducing deformation or damage of the valve core 2.

[0039] With reference to Figures 1 to 5 As shown, it also includes a sleeve assembly 5, which includes a sleeve 501, a spring 502 and an attraction assembly 503. The first end of the sleeve 501 is connected with the valve body 1, and the second end of the sleeve 501 is provided with the attraction assembly 503. The valve core 2 is arranged in the sleeve 501, and the second end of the valve core 2 is provided with the spring 502. The end of the spring 502 away from the valve core 2 is connected with the attraction assembly 503, and the attraction assembly 503 is used to attract the valve core 2 to move in the sleeve 501.

[0040] Specifically, when the electromagnetic valve needs to be opened, the attraction assembly 503 works, that is, it provides an upward attraction force to the valve core 2, and the spring 502 is squeezed, so that the valve core 2 moves and gradually moves away from the exhaust port 101. With the movement of the valve core 2, the boss 302 extends from the exhaust port 101, and the exhaust port 101 is opened, thereby realizing the opening of the electromagnetic valve; when the electromagnetic valve needs to be closed, the attraction assembly 503 stops working, and the elasticity of the spring 502 is restored. The spring 502 is elongated, and the spring 502 pushes the valve core 2 to move and gradually approaches the exhaust port 101, until the boss 302 extends into the exhaust port 101 to seal the exhaust port 101, at which time the electromagnetic valve is in a closed state.

[0041] In the embodiment, the sleeve 501 serves as a guide and support structure for the movement of the valve core 2, ensuring smooth movement of the valve core 2 within the sleeve 501; the spring 502 provides a force for the reset of the valve core 2, and when the suction assembly 503 stops working, the elastic force of the spring 502 pushes the valve core 2 back to the initial position, i.e. the closed state; the valve body 1 serves as the main structure of the electromagnetic valve, providing a platform for mounting and fixing other components, while being provided with an exhaust port 101 for controlling the inflow and outflow of fluid; the valve core 2 is a key component for controlling the flow of fluid, and controls the opening and closing of the exhaust port 101 by moving within the sleeve 501; the first end of the valve core 2 is provided with a sealing element 3, including a mounting block 301 and a boss 302, for sealing or opening the exhaust port 101; the stepped structure is formed by the difference in radial width between the mounting block 301 and the boss 302, and is lapped with the flange 4 to enhance the connection strength and sealing performance.

[0042] For reference Figures 1 to 5 As shown, the suction assembly 503 includes a coil 531 and a suction terminal 532, the coil 531 is arranged on the outer wall of the second end of the sleeve 501, and the suction terminal 532 is connected with the second end of the sleeve 501; the end of the spring 502 away from the valve core 2 is connected with the suction terminal 532.

[0043] Specifically, when the electromagnetic valve needs to be opened, the coil 531 is energized, i.e. an upward suction force is provided to the valve core 2, the spring 502 is squeezed, the suction terminal 532 attracts the valve core 2 to move and gradually move away from the exhaust port 101, with the movement of the valve core 2, the boss 302 extends out of the exhaust port 101, the exhaust port 101 is opened, thereby realizing the opening of the electromagnetic valve; when the electromagnetic valve needs to be closed, the coil 531 stops energizing, the magnetic field disappears, and the suction terminal 532 has no suction force on the valve core 2, the elasticity of the spring 502 is restored, the spring 502 is elongated, the spring 502 pushes the valve core 2 to move and gradually approaches the exhaust port 101, until the boss 302 extends into the exhaust port 101, sealing the exhaust port 101, at this time the electromagnetic valve is in the closed state.

[0044] In this embodiment, the suction assembly 503 can quickly respond to the electrical signal, realize the rapid movement of the valve core 2, and quickly open or close the exhaust port 101, thereby improving the switching speed of the electromagnetic valve. By precisely controlling the power-on and power-off of the coil 531, the suction assembly 503 can accurately control the position of the valve core 2, and in turn accurately control the flow and pressure of the fluid. In an emergency, the suction assembly 503 can quickly cut off the power supply, causing the valve core 2 to quickly close the exhaust port 101 under the action of the spring 502, thereby cutting off the fluid in time and improving the safety of the system. The suction assembly 503 controls the movement of the valve core 2 through electromagnetic force, reducing the mechanical contact and wear between the valve core 2 and the valve body 1, and prolonging the service life of the electromagnetic valve. The suction terminal 532 cooperates with the coil 531 to achieve fast response of the electromagnetic valve. When the coil 531 is powered on, the generated magnetic field quickly attracts the terminal 532, thereby quickly moving the valve core 2 to achieve fast control of the fluid. The arrangement of the suction terminal 532 enables the electromagnetic valve to effectively prevent internal and external leakage in structure, ensuring the safety of use and improving the reliability of the electromagnetic valve.

[0045] For reference Figures 1 to 5 As shown, the first end outer wall of the sleeve 501 is provided with a mounting plate 504, the end face of the mounting plate 504 away from the sleeve 501 is connected with the outer wall of the valve body 1, the valve body 1 is provided with a recess 102, the first end of the valve core 2 extends into the recess 102, and the inner wall of the recess 102 is provided with an exhaust port 101.

[0046] In this embodiment, the sleeve assembly 5 is installed on the valve body as a whole, the mounting plate 504 is connected with the valve body 1 through bolts, the connection stability between the sleeve 501 and the valve body 1 is enhanced by connecting the mounting plate 504 with the outer wall of the valve body 1, the structure of the entire electromagnetic valve is more stable, the mounting plate 504 provides a convenient fixing point, and the sleeve assembly 5 can be more easily installed on the valve body 1, thereby simplifying the assembly process. The first end of the valve core 2 extends into the recess 102, which helps to improve the sealing performance between the valve core 2 and the valve body 1 and reduce the risk of fluid leakage. The mounting plate 504 and the recess 102 can enhance the ability of the electromagnetic valve to resist external impact and protect the internal components from damage.

[0047] As a specific implementation, the suction terminal 532 is welded with the sleeve 501, and the coil 531 is sleeved outside the sleeve 501.

[0048] For reference Figures 1 to 5 As shown, the exhaust port 101 is provided with an extension pipe extending towards the recess 102, the height of the extension pipe is 1mm, the cross section of the sealing member 3 is taken as a projection plane, the height of the boss 302 is 1mm, the boss 302 is a cylinder, the diameter of the boss 302 is smaller than the diameter of the extension pipe, and the boss 302 extends into the extension pipe.

[0049] In the embodiment, the height of the extension pipe matches the height of the boss 302 (both are 1mm), and this precise size setting can ensure that the opening and closing of the exhaust port 101 is very precise, thereby precisely controlling the flow of fluid. The boss 302 is a cylinder, and its diameter is smaller than the diameter of the extension pipe, which helps to form a good seal between the boss 302 and the extension pipe, reducing the risk of fluid leakage. Through the cooperation of the extension pipe and the groove 102, the stability of the structure is increased, making the spool 2 more stable during movement. The use of the boss 302 and the extension pipe can reduce the mechanical contact and wear between the spool 2 and the valve body 1, prolonging the service life of the electromagnetic valve. The arrangement of the extension pipe makes the connection of the exhaust port 101 and the valve body 1 more compact, saving space, and makes the electromagnetic valve more compact and delicate.

[0050] As a specific implementation, the valve body 1 is also provided with an inlet 103 and an outlet 104, and the inlet 103 and the outlet 104 are connected by a channel, and the exhaust port 101 is arranged between the inlet 103 and the outlet 104. By controlling the opening and closing of the exhaust port 101, the on-off of the inlet 103 and the outlet 104 is controlled.

[0051] For reference Figures 1 to 3 As shown, the sealing member 3 is a rubber plug, and the material of the sealing member 3 is ethylene-propylene-diene rubber.

[0052] In the embodiment, the material of the rubber plug is ethylene-propylene-diene rubber, which has moderate hardness and can tightly press the exhaust port 101.

[0053] For reference Figures 1 to 3 As shown, the material of the spool 2 is 0Cr16Si2PbS.

[0054] In the embodiment, 0Cr16Si2PbS (AISI416) stainless steel is a wear-resistant stainless steel material containing high sulfur and high lead elements, which makes it have good cutting performance and wear resistance. After heat treatment, 0Cr16Si2PbS can obtain high hardness and strength, which is suitable for manufacturing parts that require high hardness and wear resistance. The material has good demagnetization effect, and can quickly demagnetize after power-on and power-off to avoid delaying the next electromagnetic valve action.

[0055] An electronic control system includes an electromagnetic valve, and the electromagnetic valve is the above-mentioned electromagnetic valve.

[0056] Those skilled in the art will readily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0057] The above merely is the preferred embodiment of the present application, and does not limit the present application, and any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is merely the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be considered as the protection scope of the present application.

Claims

1. A solenoid valve, characterized in that, The utility model relates to a valve body (1) and valve core (2) are provided with exhaust port (101) on the valve body (1); The first end of the valve core (2) is provided with a sealing element (3), the sealing element (3) includes a mounting block (301) and a boss (302), one end of the mounting block (301) is connected with the first end of the valve core (2), the other end of the mounting block (301) is connected with the boss (302), the valve core (2) is movably arranged relative to the exhaust port (101), so that the boss (302) seals the exhaust port (101) or opens the exhaust port (101). The first end of the valve core (2) is provided with a flange (4), the flange (4) is arranged inwardly foldable, the flange (4) is connected with the mounting block (301) and / or the boss (302). The radial width of the mounting block (301) is greater than the radial width of the boss (302), a stepped structure is formed between the mounting block (301) and the boss (302), and the flange (4) is overlapped with the end face of the stepped structure.

2. The electromagnetic valve according to claim 1, characterized by It also includes a sleeve assembly (5), the sleeve assembly (5) includes a sleeve (501), a spring (502) and an attraction assembly (503), the first end of the sleeve (501) is connected with the valve body (1), the second end of the sleeve (501) is provided with the attraction assembly (503); the valve core (2) is arranged in the sleeve (501), the second end of the valve core (2) is provided with the spring (502), one end of the spring (502) away from the valve core (2) is connected with the attraction assembly (503), and the attraction assembly (503) is used for attracting the valve core (2) to move in the sleeve (501).

3. The electromagnetic valve according to claim 2, characterized by The attraction assembly (503) includes a coil (531) and an attraction terminal (532), the coil (531) is arranged on the second end outer wall of the sleeve (501), the attraction terminal (532) is connected with the second end of the sleeve (501), and one end of the spring (502) away from the valve core (2) is connected with the attraction terminal (532).

4. The electromagnetic valve according to claim 1, characterized by The first end outer wall of the sleeve (501) is provided with a mounting plate (504), the end face of the mounting plate (504) away from the sleeve (501) is connected with the outer wall of the valve body (1), the valve body (1) is provided with a groove (102), the first end of the valve core (2) extends into the groove (102), and the inner wall of the groove (102) is provided with the exhaust port (101).

5. The electromagnetic valve according to claim 4, characterized by The exhaust port (101) is provided with an extension pipe extending to the groove (102), the height of the extension pipe is 1mm, the cross section of the sealing element (3) is taken as a projection plane, the height of the boss (302) is 1mm, the boss (302) is a cylinder, the diameter of the boss (302) is less than the diameter of the extension pipe, and the boss (302) extends into the extension pipe.

6. The electromagnetic valve according to claim 5, characterized by The sealing element (3) is a rubber plug, and the material of the sealing element (3) is EPDM.

7. The electromagnetic valve according to claim 6, characterized by ​ 8. The electromagnetic valve according to claim 1, characterized by ​ 9. The electromagnetic valve according to claim 1, characterized by The material of the valve core (2) is 0Cr16Si2PbS.

10. An electric control system comprising a solenoid valve, characterized by The electromagnetic valve is the electromagnetic valve according to any one of claims 1 to 9.

Images