CN114992373A - Electromagnetic valve - Google Patents

Abstract

The invention relates to an electromagnetic valve which comprises a valve body, a valve seat, a push rod assembly and an electromagnetic generating unit, wherein a communication port is formed in the valve seat, the electromagnetic generating unit comprises a coil assembly, an armature and an iron core, the armature is arranged in a groove body of the coil assembly, one end of the coil assembly is connected in the valve body, the other end of the coil assembly is provided with a first reference surface and a second reference surface, the iron core is provided with a first matching surface and a third reference surface, the valve seat is provided with a second matching surface and a third matching surface, one end of the iron core is inserted into the groove body, the first reference surface and the first matching surface are attached, a moving gap is formed between the iron core and the armature, the valve seat is covered on the valve body, the second reference surface and the second matching surface are attached, the third reference surface and the third matching surface are attached, one end of the push rod assembly penetrates through a through hole in the iron core to abut against the armature, and the other end of the push rod assembly extends out of the through hole and is used for opening and closing the communication port. The invention can improve the overall installation precision of the electromagnetic valve, can control the flow more accurately, improves the installation convenience and has simple structure.

Description

Electromagnetic valve

Technical Field

The invention belongs to the technical field of electromagnetic valves, and particularly relates to a two-position three-way electromagnetic valve.

Background

Solenoid valves are electromagnetically controlled devices that are the basic elements of automation for controlling fluids. Solenoid valves are commonly used in industrial control systems to regulate the direction, flow, velocity, and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility are generally better.

In a common two-position three-way electromagnetic valve structure, a steel ball, a return spring arranged on one side of the steel ball, a push rod arranged on the other side of the steel ball, an iron core, an armature and the like are usually adopted to control the connection and disconnection of each channel. When the electromagnetic coil is powered off, the steel ball seals the channel on the other side of the electromagnetic coil under the action of the return spring, and the channel on one side of the electromagnetic coil is communicated; when the electromagnetic coil is electrified, the armature iron overcomes the acting force of the return spring and is attracted by the iron core, the push rod is driven to push the steel ball, the channel on one side of the steel ball is sealed, and the channel on the other side of the steel ball is communicated. In order to ensure that the armature is attracted by the iron core after being electrified and then can drive the push rod to effectively push the steel ball to seal, the distance between the armature and the iron core in the electromagnetic valve needs to be accurate, if the distance between the armature and the iron core is too small, the steel ball can not completely seal a channel, and the liquid leakage amount is increased. However, because the existing electromagnetic valve is complex in structure, complex in installation process and low in precision of manual assembly, the distance between the iron core and the armature cannot meet the design requirements after the iron core and the armature are assembled, and the assembly efficiency is low.

Disclosure of Invention

The invention aims to provide an electromagnetic valve, which is used for solving the problems of complex structure, complex installation, low installation precision and the like of the existing electromagnetic valve.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides an electromagnetic valve, includes valve body, disk seat, push rod subassembly and electromagnetism generating element, the disk seat on seted up a plurality of intercommunication mouths, push rod subassembly, electromagnetism generating element set up valve body, disk seat enclose synthetic space in, electromagnetism generating element drive push rod subassembly remove the switching the intercommunication mouth, electromagnetism generating element include coil pack, armature and iron core, coil pack on seted up the cell body, armature set up the cell body in, the iron core on seted up the through-hole that runs through its both ends, push rod subassembly set up in the through-hole, coil pack's one end with the valve body connect, coil pack's the other end first reference surface, second reference surface have, the iron core on have first fitting surface, third reference surface, the disk seat on have second fitting surface, the intercommunication mouth that has, The third fitting surface, the one end of iron core insert to the cell body in and first reference surface, the laminating of first fitting surface, make the one end of iron core with armature between form the removal clearance, the disk seat lid establish the valve body on and second reference surface, the laminating of second fitting surface, third reference surface, the laminating of third fitting surface, make push rod assembly's one end with armature offset, push rod assembly's the other end stretch out the through-hole and be used for the switching the intercommunication mouth.

Preferably, the valve seat have first cavity, first cavity include first step hole, second step hole and the third step hole of consecutive direct connection, the opening orientation in first step hole the valve body, the aperture in first step hole be greater than the aperture in second step hole, the aperture in second step hole be greater than the aperture in third step hole, the bottom surface in first step hole form the second fitting surface, the bottom surface in second step hole form the third fitting surface.

Further preferably, the side wall of the iron core is provided with a protruding part, the protruding part is located in the second step hole, and the protruding part is arranged to facilitate installation and improve installation accuracy.

Still further preferably, an end surface of the projection facing the end of the coil block forms the first mating surface, and an end surface of the projection facing the end of the valve seat forms the third reference surface.

Further preferably, the coil assembly comprises a framework and a coil wound outside the framework, one end of the framework is connected with the valve body, and the first reference surface and the second reference surface are formed at the other end of the framework.

Still further preferably, the other end of the framework is provided with a boss, the boss is located in the second stepped hole, the end face of the boss forms the first reference surface, and the end face of the other end of the framework forms the second reference surface.

Further preferably, the valve seat further comprises a second cavity and a third cavity, the second cavity is communicated with the first cavity through a first channel, the third cavity is communicated with the second cavity through a second channel, the communication port comprises a first communication port, a second communication port and a third communication port, the first communication port and the second communication port are respectively formed in the side walls of the first cavity and the second cavity, and the third communication port is formed in the end portion of the third cavity.

Still more preferably, the first communication port and the second communication port are both provided with a plurality of openings, and the plurality of first communication ports and the plurality of second communication ports are distributed around the circumferential direction of the valve seat.

Still further preferably, the push rod assembly comprises a push rod and a ball, the ball is arranged in the second cavity, one end of the push rod abuts against the armature, the other end of the push rod abuts against the ball, when the electromagnetic generation unit is powered on, the push rod moves to drive the ball to seal the second channel, the first communication port and the second communication port are communicated, when the electromagnetic generation unit is powered off, the ball seals the first channel, and the second communication port and the third communication port are communicated.

Still further preferably, the solenoid valve further includes an elastic component, the elastic component is disposed in the third cavity, one end of the elastic component extends into the second passage and abuts against the ball, and the elastic component can provide an elastic force to enable the ball to open and close the first passage and the second passage.

Preferably, a first sealing ring is arranged between the iron core and the valve seat; the iron core with the cell body of coil pack between be provided with the second sealing washer, improved sealing performance, prevent that fluid from getting into and causing the damage in the use.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the invention, through the mutual matching among the coil assembly, the iron core and the multiple reference surfaces and matching surfaces among the valve seats, the overall installation precision of the electromagnetic valve can be improved, the precision of a moving gap between the iron core and the armature after installation is ensured, the flow can be more accurately controlled in the use process, the installation convenience is improved, the production efficiency is improved, the overall structure is simple, and the realization is easy.

Drawings

FIG. 1 is a perspective view of a solenoid valve according to the present embodiment;

FIG. 2 is a schematic top view of the solenoid valve of the present embodiment;

FIG. 3 is a schematic cross-sectional view of the solenoid valve of the present embodiment in an energized state;

FIG. 4 is an enlarged partial schematic view of FIG. 3 at A;

FIG. 5 is a schematic cross-sectional view of the solenoid valve of the present embodiment in a power-off state;

FIG. 6 is an enlarged partial schematic view of FIG. 5 at B;

FIG. 7 is a perspective view of the valve seat of the present embodiment;

fig. 8 is a front view schematically showing the iron core of the present embodiment;

fig. 9 is a perspective view of the coil block of the present embodiment;

fig. 10 is a perspective view of the elastic member of the present embodiment.

In the above drawings: 1. a solenoid valve body; 11. a valve body; 12. a valve seat; 120. a communication port; 1201. a first communication port; 1202. a second communication port; 1203. a third communication port; 121. a first cavity; 1211. a first stepped bore; 1212. a second stepped bore; 1213. a third stepped bore; 122. a second cavity; 123. a third cavity; 124. a first channel; 125. a second channel; 126. a second mating surface; 127. a third mating surface; 2. a push rod assembly; 21. a push rod; 22. a sphere; 3. an electromagnetic generating unit; 31. a coil assembly; 310. a trough body; 311. a framework; 3110. a boss; 3111. a left skeleton; 3112. a magnetism isolating ring; 3113. right armature 312, coil; 313. a framework insulator; 314. a first reference plane; 315. a second reference plane; 32. an armature; 33. an iron core; 330. a through hole; 331. a projection; 332. a first mating surface; 333. a third reference plane; 4. an elastic component; 41. a spring seat; 410. a through hole; 411. a base; 412. a first mounting portion; 413. a first mounting groove; 414. a flow port; 42. a spring; 43. a spring thimble; 431. a thimble main body 432, a second mounting portion; 433. a second mounting groove; 434. a flow port; 44. an adjustment member; 51. a first seal ring; 52. and a second seal ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a solenoid valve, as shown in fig. 1 to 6, including solenoid valve main part 1, push rod assembly 2, electromagnetism generating unit 3 and elastic component 4, solenoid valve main part 1 includes valve body 11, disk seat 12, solenoid valve main part 1 has seted up a plurality of intercommunication mouths 120, a plurality of intercommunication mouths 120 have been seted up on disk seat 12 promptly, push rod assembly 2, electromagnetism generating unit 3 and elastic component 4 all set up in solenoid valve main part 1, push rod assembly 2 promptly, electromagnetism generating unit 3 and elastic component 4 all set up in valve body 11, the synthetic space is enclosed by disk seat 12, electromagnetism generating unit 3 can drive push rod assembly 2 and remove intercommunication mouth 120 on the switching disk seat 12.

The following details each component and its connection relationship:

the electromagnetic generating unit 3 includes a coil assembly 31, an armature 32 and an iron core 33, as shown in fig. 4 to 6, a slot 310 is opened on the coil assembly 31, the armature 32 is disposed in the slot 310 of the coil assembly 31, one end of the iron core 33 is inserted into the slot 310, and a moving gap is formed between one end of the iron core 33 and the armature 32.

The coil assembly 31 is disposed in the valve body 11, as shown in fig. 3, 5 and 9, the coil assembly 31 includes a frame 311 and a coil 312, the coil 312 is wound outside the frame 311, one end of the frame 311 is connected to the valve body 11, the other end of the frame 311 is formed with a first reference surface 314 and a second reference surface 315, and the slot 310 is opened on the frame 311. Specifically, the method comprises the following steps: the opening of the slot body 310 faces the other end of the framework 311, the other end of the framework 311 is provided with a boss 3110, the end face of the boss 3110 forms a first reference plane 314, and the end face of the other end of the framework 311 forms a second reference plane 315; the framework 311 specifically comprises a left framework 3111, a magnetism isolating ring 3112 and a right framework 3113, the magnetism isolating ring 3112 is arranged between the left framework 3111 and the right framework 3113, the three are fixedly connected through welding, and a boss 3110 is formed on the left framework 3111; a bobbin insulator 313 is attached to the outside of the bobbin 311, and the coil 312 is wound around the outside of the bobbin insulator 313.

The armature 32 is disposed within the slot 310 of the coil assembly 31, as shown in fig. 3 and 5, and the size of the armature 32 matches the size of the slot 310. The iron core 33 is provided with a through hole 330 penetrating through two ends of the iron core 33, the iron core 33 is further provided with a first matching surface 332 and a third matching surface 333, one end of the iron core 33 is inserted into the slot 310, and the first matching surface 314 of the coil assembly 31 and the first matching surface 332 of the iron core 33 are mutually attached, so that a moving gap is formed between one end of the iron core 33 and the armature 32, and the accuracy of the moving gap is high. Specifically, the method comprises the following steps: as shown in fig. 8, the size of one end of the iron core 33 matches the size of the slot 310, the side wall of the iron core 33 has a protrusion 331, the end surface of the protrusion 331 facing the end of the coil assembly 31 forms a first mating surface 332, the end surface of the protrusion 331 facing the end of the valve seat 12 forms a third reference surface 333, and by providing the protrusion 331 on the iron core 33, the first reference surface 314 and the first mating surface 332 are attached to each other, so that the iron core 33 can be mounted easily, and the accuracy of the movement gap formed between the iron core 33 and the armature 32 is improved.

The valve seat 12 is connected to the valve body 11, and a plurality of communication ports 120 are opened in the valve seat 12. As shown in fig. 7, the valve seat 12 has a second engagement surface 126 and a third engagement surface 127, the electromagnetic generating unit 3 is housed in the valve seat 12, the second reference surface 315 of the coil unit 31 and the second engagement surface 126 of the valve seat 12 are bonded to each other, and the third reference surface 333 of the core 33 and the third engagement surface 127 of the valve seat 12 are bonded to each other, so that the valve seat 12 can be accurately attached.

Specifically, the method comprises the following steps: one end of the valve seat 12 is connected with the valve body 11, a first cavity 121, a second cavity 122 and a third cavity 123 are arranged in the valve seat 12, the first cavity 121 is communicated with the second cavity 122 through a first passage 124, the second cavity 122 is communicated with the third cavity 123 through a second passage 125, an opening of the first cavity 121 faces one end of the valve seat 12, and an opening of the third cavity 123 faces the other end of the valve seat 12; the first cavity 121 includes a first stepped hole 1211, a second stepped hole 1212 and a third stepped hole 1213 which are directly connected in sequence, an opening of the first stepped hole 1211 faces the valve body 11, a hole diameter of the first stepped hole 1211 is larger than a hole diameter of the second stepped hole 1212, and a hole diameter of the second stepped hole 1212 is larger than a hole diameter of the third stepped hole 1213; the size of the first stepped hole 1211 matches with the size of the left bobbin 3111, the size of the second stepped hole 1212 matches with the size of the protrusion 331 of the core 33, the boss 3110 of the bobbin 311, and the size of the third stepped hole 1213 matches with the size of the other end of the core 33; as shown in fig. 7, the bottom surface of the first stepped bore 1211 forms the second mating surface 126, and the bottom surface of the second stepped bore 1212 forms the third mating surface 127.

The plurality of communication ports 120 in the valve seat 12 specifically include a first communication port 1201, a second communication port 1202, and a third communication port 1203, as shown in fig. 4 and 6, the first communication port 1201 is formed in a side wall of the first cavity 121, specifically, a side wall near the bottom of the third stepped hole 1213, the first communication port 1201 is formed in a plurality, and the plurality of first communication ports 1201 are distributed around the circumferential direction of the valve seat 12; the second communication port 1202 is formed in the side wall of the second cavity 122, and the second communication ports 1202 are formed in plural numbers, and the plural second communication ports 1202 are distributed around the circumferential direction of the valve seat 12; the third communication port 1203 is opened at an end portion of the third cavity 123, that is, the third communication port 1203 is located at the other end of the valve seat 12.

The push rod assembly 2 includes a push rod 21 and a ball 22, as shown in fig. 3 and 5, the ball 22 is disposed in the second cavity 122, the push rod 21 is disposed in the through hole 330 of the iron core 33, and one end of the push rod 21 extends out of the through hole 330 and abuts against the armature 32, and specifically, one end of the push rod 21 may be fixedly connected to the armature 32 by welding, or may also adopt other detachable connection manners; the other end of the push rod 21 extends out of the through hole 330 and extends into the first channel 124 to abut against the ball 22, so as to push the ball 22 to open and close the communication port 120, that is, push the ball 22 to open and close the first channel 124 and the second channel 125.

In order to ensure the sealing property when the first channel 124 and the second channel 125 are closed, as shown in fig. 4 and 6, the opening of the first channel 124 facing the second cavity 122 is in a circular arc shape, and the shape of the circular arc shape at least partially matches the shape of the sphere 22; the opening of the second channel 125 facing the second cavity 122 is in the shape of a circular arc, and the shape of the circular arc at least partially matches the shape of the sphere 22. The openings of the first channel 124 and the second channel 125 are set to be circular arc-shaped, so that the sealing performance can be improved, and the liquid leakage amount of the electromagnetic valve can be greatly reduced.

The elastic component 4 is disposed in the third cavity 123, as shown in fig. 4 and fig. 6, one end of the elastic component 4 extends into the second channel 125 and abuts against the ball 22, and the elastic component 4 can provide an elastic force to enable the ball 22 to open and close the first channel 124 and the second channel 125. The elastic component 4 specifically includes a spring seat 41, a spring 42, a pogo pin 43, and an adjusting piece 44, the spring 42 is disposed between the spring seat 41 and one end of the pogo pin 43, the other end of the pogo pin 43 penetrates into the second channel 125 and abuts against the ball 22, the adjusting piece 44 is disposed between the spring seat 41 and the spring 42, or the adjusting piece 44 is disposed between the spring seat 41 and one end of the pogo pin 43, or the adjusting piece 44 is disposed between the spring seat 41 and the spring 42, or between the spring seat 41 and one end of the pogo pin 43.

Set up the through-hole 410 that runs through its both ends on the spring holder 41, and third intercommunication mouth 1203 communicates with through-hole 410, specifically: as shown in fig. 10, the spring seat 41 includes a base 411, a first mounting portion 412, and a through hole 410 opened in the middle of the base 411; the first mounting portions 412 are formed on the base 411, a plurality of first mounting portions 412 are provided, the plurality of first mounting portions 412 extend towards one side of the pogo pin 43, the plurality of first mounting portions 412 are distributed around the circumference of the base 411, the first mounting grooves 413 are enclosed among the plurality of first mounting portions 412, and the adjusting piece 44 and the spring 42 can be arranged in the first mounting grooves 413 to improve the mounting stability; a flow port 414 is formed between two adjacent first mounting portions 412, the third communication port 1203 communicates with the flow port 414, and the flow port 414 allows the oil in the third communication port 1203 to flow therethrough. Detachably be connected between spring holder 41 and the third cavity 123 to be convenient for adjust the quantity of regulating part 44 or be convenient for change spring 42, for example the outer wall of spring holder 41 has the external screw thread, and the inside of third cavity 123 has the internal thread, and external screw thread, internal thread mutually support, make to form threaded connection between spring holder 41 and the third cavity 123, realize the detachable connection between spring holder 41 and the third cavity 123.

The spring thimble 43 is movably disposed in the third cavity 123, as shown in fig. 10, the spring thimble 43 includes a thimble main body 431 and a plurality of second mounting portions 432, the second mounting portions 432 are formed at one end of the thimble main body 431, the plurality of second mounting portions 432 are disposed, the plurality of second mounting portions 432 extend toward one side of the spring seat 41, the plurality of second mounting portions 432 are distributed around the circumference of the thimble main body 431, a second mounting groove 433 is defined between the plurality of second mounting portions 432, the adjusting element 44 and the spring 42 are disposed in the second mounting groove 433, and the second mounting groove 433 is disposed to improve the mounting stability of the adjusting element 44 and the spring 42; a flow port 434 is formed between two adjacent second mounting parts 432 to ensure that oil can flow; the other end of the thimble main body 431 penetrates into the second channel 125 and abuts against the ball 22.

The adjusting member 44 is disposed in the first mounting groove 413 and/or the second mounting groove 414, and the adjusting member 44 may be provided in plurality, and a plurality of adjusting members 44 are stacked. The elastic force of the spring 42 can be adjusted by arranging the adjusting pieces 44, namely, the number of the adjusting pieces 44 can be adjusted according to the requirement of the elastic force. In this embodiment: as shown in fig. 10, the adjusting member 44 is disposed in the first mounting groove 413; the adjusting member 44 is a spacer, and the size of the spacer matches the size of the first and second mounting grooves 413, 414.

In order to improve the sealing performance, a first seal ring 51 is provided between the core 33 and the valve seat 12, and a second seal ring 52 is provided between the core 33 and the groove 310 of the coil block 31. Specifically, the method comprises the following steps: a groove is formed on the side wall of the protrusion 331 of the iron core 33, and the first sealing ring 51 is arranged in the groove; a groove is formed in a side wall of one end of the iron core 33 inserted into the groove 310 of the coil block 31, and the second sealing ring 52 is disposed in the groove. Through setting up first sealing washer 51, second sealing washer 52 can improve the sealing performance of solenoid valve, reduce the leakage liquid volume, prevent that fluid from getting into and causing the damage in the use.

The working process of the solenoid valve of the present embodiment is specifically described below:

when the electromagnetic generating unit 3 is powered on, the coil 312 magnetizes the iron core 33, so that the armature 32 is attracted by the iron core 33, that is, the armature 32 moves towards the iron core 33, the moving gap between the armature 32 and the iron core 33 is reduced, and the armature 32 moves to synchronously drive the push rod 21 to move, so that the ball 22 is attached to the second channel 125 and faces the opening of the second cavity 122, the elastic component 4 is compressed, at this time, the first channel 124 is opened, the first communicating port 1201 is communicated with the second communicating port 1202, and the second communicating port 1202 is closed with the third communicating port 1203;

when the electromagnetic generating unit 3 is powered off, the spring ejector pin 43 is driven by the elastic force of the return spring 42 to move, so that the ball 22 abuts against the first passage 124 and faces the opening of the second cavity 122, and the push rod 21 and the armature 32 also move in the direction away from the iron core 33, at this time, the second passage 125 is opened, the third port 1203 is communicated with the second port 1202, and the second port 1202 is closed with the first port 1201.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides an electromagnetic valve, includes valve body, disk seat, push rod subassembly and electromagnetism generating element, the disk seat on seted up a plurality of intercommunication mouths, push rod subassembly, electromagnetism generating element set up valve body, disk seat enclose in the synthetic space, electromagnetism generating element drive push rod subassembly remove the switching the intercommunication mouth, electromagnetism generating element include coil pack, armature and iron core, its characterized in that: the coil assembly is provided with a groove body, the armature is arranged in the groove body, the iron core is provided with a through hole penetrating through two ends of the iron core, the push rod assembly is arranged in the through hole, one end of the coil assembly is connected with the valve body, the other end of the coil assembly is provided with a first datum plane and a second datum plane, the iron core is provided with a first matching plane and a third datum plane, the valve seat is provided with a second matching plane and a third matching plane, one end of the iron core is inserted into the groove body and is attached to the first datum plane and the first matching plane, so that a moving gap is formed between one end of the iron core and the armature, the valve seat covers the valve body and is attached to the second datum plane and the second matching plane, the third datum plane and the third matching plane, one end of the push rod component is abutted against the armature, and the other end of the push rod component extends out of the through hole and is used for opening and closing the communication port.

2. The solenoid valve according to claim 1, wherein: the valve seat have a first cavity, the first cavity include first step hole, second step hole and third step hole of lug connection in proper order, the opening orientation in first step hole the valve body, the aperture in first step hole be greater than the aperture in second step hole, the aperture in second step hole be greater than the aperture in third step hole, the bottom surface in first step hole form the second fitting surface, the bottom surface in second step hole form the third fitting surface.

3. The solenoid valve according to claim 2, wherein: the side wall of the iron core is provided with a protruding part, and the protruding part is positioned in the second step hole.

4. A solenoid valve according to claim 3, wherein: the end face of the bulge facing one end of the coil assembly forms the first matching surface, and the end face of the bulge facing one end of the valve seat forms the third reference surface.

5. The solenoid valve according to claim 2, wherein: the coil pack include the skeleton, around establishing the outside coil of skeleton, the skeleton one end with the valve body connect, first reference surface, second reference surface form the other end of skeleton.

6. The solenoid valve according to claim 5, wherein: the other end of the framework is provided with a boss, the boss is positioned in the second step hole, the end face of the boss forms the first reference surface, and the end face of the other end of the framework forms the second reference surface.

7. The solenoid valve according to claim 2, wherein: the valve seat is also provided with a second cavity and a third cavity, the second cavity is communicated with the first cavity through a first channel, the third cavity is communicated with the second cavity through a second channel, the communication port comprises a first communication port, a second communication port and a third communication port, the first communication port and the second communication port are respectively arranged on the side walls of the first cavity and the second cavity, and the third communication port is arranged at the end part of the third cavity.

8. The solenoid valve as set forth in claim 7, wherein: the push rod component comprises a push rod and a ball body, the ball body is arranged in the second cavity, one end of the push rod is abutted to the armature, the other end of the push rod is abutted to the ball body, when the electromagnetic generation unit is powered on, the push rod moves to drive the ball body to seal the second channel, the first communicating port and the second communicating port are communicated, when the electromagnetic generation unit is powered off, the ball body seals the first channel, and the second communicating port and the third communicating port are communicated.

9. The solenoid valve according to claim 7, wherein: the electromagnetic valve further comprises an elastic component, the elastic component is arranged in the third cavity, and one end of the elastic component extends into the second channel and is abutted to the ball body.

10. The solenoid valve according to claim 1, wherein: a first sealing ring is arranged between the iron core and the valve seat; and a second sealing ring is arranged between the iron core and the groove body of the coil assembly.

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