An electromagnetic valve

Abstract

The application discloses an electromagnetic valve, which comprises a clamp, a valve seat and a magnetic conductor, the clamp is fixedly connected or positionally connected with the magnetic conductor, the clamp is provided with a clamp clamping portion, the magnetic conductor comprises a first portion and a second portion, the second portion is closer to the valve seat relative to the first portion, the second portion is provided with a lower end face, the clamp clamping portion and the lower end face have a preset interval, the valve seat is provided with a clamping groove, and the clamp clamping portion is at least partially limited in the clamping groove. The magnetic conductor of the electromagnetic valve is provided with the clamp, the clamp clamping portion and the lower end face of the magnetic conductor have an interval, the clamp clamping portion has a certain deformation space, can be better clamped into the clamping groove of the valve seat, and thus the valve seat and the magnetic conductor can be reliably limited in the axial direction.

Description

Technical Field

[0001] This invention relates to the field of valve structure technology, and specifically to a solenoid valve. Background Technology

[0002] The solenoid valve includes a solenoid coil and a valve body. The sleeve of the valve body is inserted into the solenoid coil. The valve seat of the valve body is a thin-walled stretched part with a concave hole punched at the upper end. A snap-fit ​​plate is set at the bottom of the magnetic conductor of the solenoid coil. The snap-fit ​​plate is set with protrusions. The axial snap-fit ​​is formed by the protrusions snapping into the concave hole to position the snap-fit ​​plate and the valve seat, thereby achieving the positioning of the solenoid coil and the valve body. However, the positioning effect is not ideal. Summary of the Invention

[0003] This application provides a solenoid valve, including a clamp, a valve seat, and a magnetic conductor. The clamp is fixedly connected or limited to the magnetic conductor. The clamp has a clamp locking part. The magnetic conductor includes a first part and a second part. The second part is closer to the valve seat than the first part. The second part has a lower end face. There is a preset distance between the clamp locking part and the lower end face. The valve seat has a locking groove. The clamp locking part is at least partially limited in the locking groove.

[0004] In one specific embodiment, the outer peripheral wall of the valve seat is provided with an annular groove, a portion of which is the locking groove and the remaining portion is the anti-disengagement groove. The axial height and radial depth of the locking groove are both greater than the axial height and radial depth of the anti-disengagement groove. The clamp is provided with a clamp locking part, which can be locked into the locking groove or the anti-disengagement groove to fix the valve seat and the clamp.

[0005] In one specific embodiment, the annular groove includes at least one set of the locking grooves, and the set of locking grooves includes two locking grooves arranged radially symmetrically; the clamp is provided with two clamp locking parts, and the two clamp locking parts correspond to the set of the locking grooves; or, the annular groove is provided with one locking groove, and the clamp is provided with one clamp locking part.

[0006] In one specific embodiment, the cross-section of the locking groove and the anti-dislodgement groove along the radial direction of the valve seat is V-shaped or U-shaped.

[0007] In one specific embodiment, the locking groove and the anti-detachment groove are smoothly connected in the circumferential direction.

[0008] In one specific embodiment, a press-in guide is provided at the end edge of the valve seat near the electromagnetic coil, and the press-in guide is an annular chamfer provided at the end edge of the valve seat.

[0009] In one specific embodiment, the clamp is formed by bending a metal wire, the clamp is provided with at least two clamp fixing parts, the magnetic conductor is provided with a magnetic conductor fixing part, the magnetic conductor fixing part is a buckle with a snap, and the clamp fixing part is snapped into the snap for fixation.

[0010] In one specific embodiment, the clamp is U-shaped, or a closed ring, or a ring with an opening.

[0011] In one embodiment, the clamp is bent to form a first part and a second part, the first part of the clamp being located outside the second part of the magnetic conductor, and the second part of the clamp being located outside the first part of the magnetic conductor.

[0012] In one specific embodiment, the clamp is U-shaped, with its two free ends extending to both sides to form two clamp fixing parts, and the bottom of the clamp being recessed inward to form a recess, which is one clamp fixing part.

[0013] In one specific embodiment, the lower end of the second part of the magnetic conductor is provided with a magnetic conductor fixing part with opposing bayonets. The clamp is a closed ring or a ring with an opening. The clamp includes two clamp segments arranged opposite to each other, both of which form the clamp fixing part.

[0014] In one specific embodiment, the valve seat is machined.

[0015] The solenoid valve of this application has a clamp on its magnetic conductor. The clamp's locking part and the lower end face of the magnetic conductor are spaced apart, so the clamp's locking part has a certain deformation space and can be well locked into the locking groove of the valve seat, thereby reliably locking the valve seat and the magnetic conductor in the axial direction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the solenoid valve in the first embodiment of this application;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the central valve body;

[0018] Figure 3 for Figure 2 Left view of the valve body;

[0019] Figure 4 for Figure 2 Enlarged view of the connection position between the valve seat and the sleeve of the valve body;

[0020] Figure 5 for Figure 3 Enlarged view of the connection position between the valve seat and the sleeve of the valve body;

[0021] Figure 6 for Figure 1 A three-dimensional structural diagram of the electromagnetic coil;

[0022] Figure 7 for Figure 6 A schematic diagram of the magnetic conductor of the electromagnetic coil;

[0023] Figure 8 for Figure 7 Top view;

[0024] Figure 9 for Figure 6 Schematic diagram of the clamp;

[0025] Figure 10 for Figure 6 Schematic diagram of the connection between the intermediate conductor magnet and the clamp;

[0026] Figure 11 for Figure 10 Top view;

[0027] Figure 12 for Figure 11 The left view;

[0028] Figure 13 for Figure 11 A bottom view;

[0029] Figure 14 for Figure 1 An axial sectional view of the solenoid valve at the connection position between the clamp and the valve body, at which point the clamp has not yet been engaged in the groove of the valve body;

[0030] Figure 15 for Figure 14 A diagram showing the clamp inserted into the slot.

[0031] Figure 16 This is a schematic diagram of the connection between the magnetic conductor and the clamp of the solenoid valve in the second embodiment of this application;

[0032] Figure 17 for Figure 16 Schematic diagram of the clamp;

[0033] Figure 18 for Figure 16 Schematic diagram of a medium-conducting magnet;

[0034] Figure 19 This is an axial sectional view of the connection position between the clamp and the valve body in the second embodiment of this application;

[0035] Figure 20 This is a schematic diagram of the connection between the magnetic conductor and the clamp of the solenoid valve in the third embodiment of this application;

[0036] Figure 21 for Figure 20Schematic diagram of the clamp;

[0037] Figure 22 for Figure 21 Top view of the clamp;

[0038] Figure 23 This is an axial sectional view of the connection position between the clamp and the valve body in the third embodiment of this application.

[0039] Figure 1-23 The annotations in the attached figures are explained as follows:

[0040] 10 - Valve body;

[0041] 11-Sleeve;

[0042] 12-Valve seat; 12a1-First locking groove; 12a2-Second locking groove; 12b-Press-in guide; 12c-Anti-disengagement groove;

[0043] 13-First takeover;

[0044] 14-Second Takeover;

[0045] 20 - Electromagnetic coil;

[0046] 21-Magnetic conductor; 211-Base plate; 211a-First edge portion; 211b-Second edge portion; 212-Side plate; 213-Top plate; 21a1-First magnetic conductor fixing portion; 21a2-Second magnetic conductor fixing portion; 21a3-Third magnetic conductor fixing portion; 21b-Lower through hole of magnetic conductor;

[0047] 22-Clamp; 22a1-First clamp fixing part; 22a2-Second clamp fixing part; 22a3-Third clamp fixing part; 22b1-First clamp positioning part; 22b2-Second clamp positioning part; 22b3-Side rod section

[0048] 23-Coil assembly. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Example 1

[0051] Please refer to Figure 1-3 , Figure 1 This is a schematic diagram of the structure of the solenoid valve in the first embodiment of this application; Figure 2 for Figure 1 Schematic diagram of the structure of the middle valve body 10; Figure 3 for Figure 2 Left view of the valve body 10.

[0052] The solenoid valve in this embodiment includes a valve body 10 and a solenoid coil 20. The valve body 10 specifically includes a sleeve 11, a valve seat 12, a first connecting pipe 13, a second connecting pipe 14, and components installed inside the sleeve 11 and the valve seat 12. The sleeve 11 and the valve seat 12 are coaxially arranged. The solenoid coil 20 is sleeved on the outer periphery of the sleeve 11. The valve seat 12 is located below the sleeve 11. The first connecting pipe 13 is located on one side of the valve seat 12, and the second connecting pipe 14 is located axially below the valve seat 12. The first connecting pipe 13 can be an inlet pipe, and the second connecting pipe 14 can be an outlet pipe. Therefore, the first connecting pipe 13 can be an outlet pipe, and the second connecting pipe 14 can be an inlet pipe. The terms "upper" and "lower" in the text refer to... Figure 1 From the perspective of the vertical direction, which is also the axis of the solenoid valve, a valve port is formed inside the valve seat 12, and an iron core is installed inside the sleeve 11.

[0053] Please continue to refer to this. Figure 4 , 5 , Figure 4 for Figure 2 Enlarged view of the connection position between the valve seat 12 and the sleeve 11 of the valve body 10; Figure 5 for Figure 3 An enlarged view of the connection position between the valve seat and the sleeve 11 of the valve body 10.

[0054] Figure 4 In this embodiment, the valve seat 12 has a locking portion on its outer peripheral wall near the end of the sleeve 11. Specifically, the locking portion is located on the side of the valve seat 12, forming the peripheral wall. The valve seat 12 has two locking portions: a first locking groove 12a1 and a second locking groove 12a2. The first locking groove 12a1 and the second locking groove 12a2 are symmetrically arranged with respect to the center line (axis) of the valve seat 12. In this embodiment, the locking groove can be... Figure 4 The V-shaped groove described herein can also be a U-shaped groove, etc., where the V-shape or U-shape refers to the cross-section along the radial direction of the valve seat 12. A press-in guide portion 12b is provided at the upper edge of the valve seat 12. The press-in guide portion 12b is an annular guide surface located above the first locking groove 12a1 and the second locking groove 12a2. In this embodiment, the valve seat 12 can be machined. The first locking portion 12a1, the second locking portion 12a2, and the press-in guide portion 12b can all be machined later. Machined locking portions do not affect the accuracy of the valve seat 12. The first locking groove 12a1 and the second locking groove 12a2 are used for engaging with the clamp 22 described below.

[0055] Please continue to refer to this. Figure 6-8 , Figure 6 for Figure 1 A three-dimensional structural diagram of the electromagnetic coil 20; Figure 7 for Figure 6 A schematic diagram of the magnetic conductor of the electromagnetic coil 20; Figure 8 for Figure 7 Top view; Figure 9 for Figure 6 Schematic diagram of the clamp; Figure 10 for Figure 6 Schematic diagram of the connection between the intermediate conductor magnet and the clamp; Figure 11 for Figure 10 Top view; Figure 12 for Figure 11 The left view; Figure 13 for Figure 11 A bottom view.

[0056] The solenoid coil 20 of the solenoid valve includes a magnetic conductor 21, a clamp 22, and a coil assembly 23. The coil assembly 23 contains an enameled wire winding, which generates an electromagnetic field when energized. When the solenoid coil 20 of the solenoid valve is energized, the sleeve 11 of the valve body 10 contains an iron core. Under the action of electromagnetic force, the iron core can move axially to realize the opening and closing function of the valve port inside the valve seat 12.

[0057] In this embodiment, the clamp 22 can be formed by bending a rod-shaped or strip-shaped piece, such as a steel wire with good elasticity. Figure 9 As shown, the clamp 22 is formed by bending steel wire and has a roughly U-shaped structure, including two side rod sections and a bottom rod section. The U-shaped clamp 22 is divided into a first part 221 and a second part 222 near the bottom along the direction from the opening to the bottom. The second part 222 is bent relative to the first part 221, and the bending angle is approximately 90 degrees. In this embodiment, the magnetic conductor 21 includes a first part and a second part, wherein the second part is closer to the valve seat 12 than the first part, as can be seen from... Figure 7 , 10 Understanding the magnetic conductor 21, it includes a top plate 213, a bottom plate 211, and a side plate 212 connecting the top plate 213 and the bottom plate 211, arranged axially opposite to each other. In this case, the bottom plate 211 is the second part of the magnetic conductor 21, and the side plate 212 is the first part. That is, in this embodiment, the magnetic conductor 21 is approximately U-shaped. After the clamp 22 is connected to the magnetic conductor 21, the first part 221 of the clamp 22 is located on the outer side of the bottom plate 211 (the side of the bottom plate 211 closer to the coil assembly 23 is the inner side, and vice versa). Figure 1 From a perspective of viewpoint, the first part 221 is also located below the base plate 211, and the second part 222 is located on the outside of the side plate 212 of the magnetic conductor 21 (the side of the side plate 212 closer to the coil assembly 23 is the inside, and vice versa). The second part 212 of the clamp 22 can be fitted to the side plate 22 or have a certain gap. The bending angle of the first part 221 and the second part 222 of the clamp 22 is approximately equal to the angle between the base plate 211 and the side plate 212.

[0058] Please continue to refer to this. Figure 9The clamp 22 has three fixing parts. The U-shaped clamp 22 has two free ends located at its opening. The two free ends are respectively provided with a first clamp fixing part 22a1 and a second clamp fixing part 22a2. The first clamp fixing part 22a1 and the second clamp fixing part 22a2 are hook structures. The two free ends of the clamp 22 extend outward, that is, away from the area enclosed by the U-shaped clamp. The bottom rod section of the U-shaped clamp 22 is provided with a third clamp fixing part 22a3. The third clamp fixing part 22a3 is a recessed part formed by the inward indentation in the middle of the bottom rod section, that is, towards the area enclosed by the U-shaped clamp.

[0059] Specifically, such as Figure 7 As shown, the base plate 211 of the magnetic conductor 21 includes a first edge portion 211b connected to the side plate 212 and a second edge portion 211a opposite to the first edge portion 211b. A first magnetic conductor fixing portion 21a1 and a second magnetic conductor fixing portion 21a2 are provided at the position of the second edge portion 211a, distributed along the extending direction of the second edge portion 211a. The first magnetic conductor fixing portion 21a1 and the second magnetic conductor fixing portion 21a2 form a bayonet, with the bayonet facing from the first edge portion 211b to the second edge portion 211a. The side plate 212 of the magnetic conductor 21 is provided with a third magnetic conductor fixing portion 21a3, which also forms a bayonet, facing the first edge portion 211b. Figure 7 In this process, the first magnetic conductor fixing part 21a1, the second magnetic conductor fixing part 21a2, and the third magnetic conductor fixing part 21a3 can all be directly processed on the magnetic conductor 21, formed by stamping and bending parts of the bottom plate 211 and the side plate 212 of the magnetic conductor 21.

[0060] like Figure 10 As shown, during installation, the first clamp fixing part 22a1 and the second clamp fixing part 22a2 of the clamp 22 can be inserted into the slots of the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2 of the magnetic conductor 21, and the third clamp fixing part 22a3 of the clamp 22 can be inserted into the third magnetic conductor fixing part 21a3 of the magnetic conductor 21. The clamp 22 has a certain deformation capacity; under the action of external force, it can deform to be near the corresponding magnetic conductor fixing part. After the external force is removed, the clamp 22 springs back to be locked in place, achieving the purpose of locking and fixing. Figure 10For example, the third magnetic conductor fixing part 21a3 can be inserted first. The first clamp fixing part 22a1 and the second clamp fixing part 22a2 can be close to each other and positioned between the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2. After the external force is removed, the first clamp fixing part 22a1 and the second clamp fixing part 22a2 will move away from each other under the rebound action and be inserted into the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2. Of course, the installation sequence is not limited to this. Due to its certain elasticity, the three clamping positions can also be deformed under the action of external force and installed simultaneously.

[0061] At this time, the first part 221 of the clamp 22 cannot move towards the first edge 211b because the first clamp fixing part 22a1 and the second clamp fixing part 22a2 are respectively inserted into the slots of the first magnetic conductor fixing part 21a1 and the second magnetic conductor 21a2. Due to the bending of the first part 221 and the second part 222, the second part 222 is stuck in the side plate 212, so the first part 221 cannot move away from the first edge 211b. The degrees of freedom of the clamp 22 in other directions are restricted by the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2 of the magnetic conductor 21. Therefore, the first part 221 cannot move, and correspondingly, the second part 222 cannot move either. Furthermore, the second part 222 of the clamp 22 is provided with a third clamp fixing part 22a3 that engages with the third magnetic conductor fixing part 22a3 of the magnetic conductor 21. This makes it difficult for the second part 222 to move away from the side plate 212, maintaining reliable engagement with the side plate 212. It is understood that the locking mechanism of the third magnetic conductor fixing part 22a3 can also be reversed. Therefore, the clamp 22 and the magnetic conductor 21 can be completely fixed together by the three fixing parts corresponding to the clamp 22 and the magnetic conductor 21, preventing relative movement or sliding of the clamp 22.

[0062] Furthermore, in this embodiment, the two side rod segments of the U-shaped clamp 22 correspond to the rod segments of the first part 221, including straight rod segments. The straight rod segments have a certain distance from the base plate 211 of the magnetic conductor 21, and the positions where the two ends of the straight rod segments meet are close to the base plate 211 or the distance between the straight rod segments and the base plate 211 is smaller than the distance between the straight rod segments and the base plate 211. This provides space for elastic deformation. These two straight rod segments are respectively defined as the first clamp positioning part 22b1 and the second clamp positioning part 22b2. That is, the clamp positioning part needs to have a distance from the base plate 211 so as to cooperate with the first positioning groove 12a1 and the second positioning groove 12a2 of the valve body 10 mentioned above.

[0063] For details, please refer to [link / reference]. Figure 14 , 15 understand, Figure 14 for Figure 1An axial sectional view of the solenoid valve at the connection position between clamp 22 and valve body 10, at which point clamp 22 has not yet been engaged in the groove of valve body 10. Figure 15 for Figure 14 A schematic diagram of the clamp 22 after it is inserted into the slot.

[0064] In this embodiment, during assembly, the sleeve 11 of the valve body 10 is inserted into the lower through hole 21b of the magnetic conductor at the bottom of the electromagnetic coil 20. The positions of the valve body 10 and the electromagnetic coil 20 are adjusted accordingly. Figure 14 As shown, at this time, the first locking groove 12a1 and the second locking groove 12a2 corresponding to the valve seat 12 are roughly aligned with the first locking part 22b1 and the second locking part 22b2 of the clamp 22. The first locking part 22b1 and the second locking part 22b2 of the clamp 22 are in contact with the pressing guide part 12b of the valve seat 12. If no downward force is applied to the electromagnetic coil 20, the two locking parts of the clamp 22 of the magnetic conductor 21 cannot enter the two locking parts of the valve seat 12.

[0065] like Figure 15 As shown, in Figure 14 Based on the application of a downward force to the electromagnetic coil 20, the clamp 22 can expand and deform radially outward under the guidance of the pressing guide part 12b. That is, the first clamp locking part 22b1 and the second clamp locking part 22b2 of the clamp 22 will produce elastic deformation that expands to both sides in a direction perpendicular to the pressing direction, so that the first clamp locking part 22b1 and the second clamp locking part 22b2 of the clamp 22 continue to move downward and finally lock into the first locking groove 12a1 and the second locking groove 12a2 of the valve seat 12. Then the valve body 10 and the electromagnetic coil 20 are installed.

[0066] It can be seen that the number of locking slots on the valve seat 12 can be set as needed, for example, set to a multiple of 2, that is, two locking slots that can correspond to the two locking parts of the clamp 22 are set as a group, and multiple groups can be set. Each group of locking slots is radially symmetrical, so that the relative installation angle between the electromagnetic coil 20 and the valve seat 12 can be adjusted. It can be selected according to the actual assembly scenario, which is conducive to the installation and arrangement of the lead wires and other components of the electromagnetic coil 20 after assembly.

[0067] It is worth noting that in this embodiment, the two locking grooves of the valve seat 12 are also provided with anti-disengagement grooves 12c at their circumferential positions. The anti-disengagement grooves 12c are also roughly V-shaped grooves, but of course, they can be other groove shapes, such as U-shaped ones. The anti-disengagement grooves 12c are distributed and connected to the first locking groove 12a1 and the second locking groove 12a2 along the circumference. The axial height and radial depth of the anti-disengagement grooves 12c are respectively smaller than the axial height and radial depth of the locking grooves. It can be understood that an annular groove is set around the outer peripheral wall of the valve seat 12, with a larger groove segment being the locking groove and the remaining groove segment being the anti-disengagement groove 12c. This can be compared with the previous embodiment. Figure 4 , 5 Understood. The anti-disengagement groove 12c is mainly used when the solenoid coil 20 is installed and fixed to the valve body 10. If the clamping part of the clamp 22 is not pressed into the clamping groove of the valve seat 12, but is pressed into the anti-disengagement groove 12c, the anti-disengagement groove 12c can also axially press the clamp 22 to fix the clamp 22 and the valve seat 12, that is, the solenoid coil 20 will not separate from the valve body 10. It can be seen that the size of the clamping groove is larger to more reliably clamp the clamping part and play a role in fixing and determining the angle between the solenoid coil 20 and the valve body 10. The anti-disengagement groove 12c is a redundancy of the clamping groove, and only needs to play a certain fixing purpose. Its fixing effect is less than that of the clamping groove. In addition, setting only a part of the annular groove to be larger has little impact on the strength of the valve seat 12.

[0068] Furthermore, the locking grooves (first locking groove 12a1, second locking groove 12a2) of the annular groove have different dimensions from the anti-dislodgement groove 12c. The two grooves connect to form the annular groove, and the locking groove and the anti-dislodgement groove 12c can smoothly transition into each other. Figure 5 As shown, the two ends of the locking groove have the same axial height and radial depth as the anti-disengagement groove 12c, then gradually increase to the maximum value along the circumference, and then gradually decrease to the other end, having the same size as the anti-disengagement groove 12c at the other end. From Figure 5 As can be seen, the upper and lower contours of the first locking groove 12a1 in the axial plane are roughly arc-shaped. This design makes it easier for the clamp locking part to engage with the corresponding locking groove.

[0069] In addition, a chamfered pressing guide 12b is provided above the locking groove. This is mainly used to reduce the assembly pressing force when the locking part of the clamp 22 is pressed into the locking groove of the valve seat 12. The electromagnetic coil 20 can be easily put into place by gently sliding it along the axial direction of the sleeve 11, making assembly easy.

[0070] Example 2

[0071] Please refer to Figure 16-19 , Figure 16 This is a schematic diagram showing the connection between the magnetic conductor 21 and the clamp 22 of the solenoid valve in the second embodiment of this application; Figure 17 for Figure 16 Schematic diagram of clamp 22; Figure 18 for Figure 16 Schematic diagram of intermediate conductor magnet 21; Figure 19 This is an axial sectional view of the connection position between the clamp 22 and the valve body 10 in the second embodiment of this application.

[0072] Compared to the U-shaped clamp 22 in the first embodiment, the clamp 22 in this embodiment is designed as a ring-shaped clamp 22 with its ends connected. The clamp 22 is also formed by bending metal wire, such as steel wire. Furthermore, the clamp 22 in the first embodiment is divided into a first part 221 corresponding to the base plate 211 of the magnetic conductor 21 and a second part 222 corresponding to the side plate 212, while the ring-shaped clamp 22 in this embodiment corresponds to the base plate 211 and is disposed on the outer side of the base plate 211. Figure 19 The viewpoint is that the entire structure is positioned below the base plate 211.

[0073] Combination Figure 16-18 In this embodiment, the magnetic conductor 21 has two magnetic conductor fixing parts, namely a first magnetic conductor fixing part 21a1 and a second magnetic conductor fixing part 21a2. The two magnetic conductor fixing parts are snap-fit ​​structures with their bayonets facing each other. Figure 16 In the design, the latch of the first magnetic conductor fixing part 21a1 faces the first edge part 211b, and the latch of the second magnetic conductor fixing part 21a2 faces the second edge part 211a. The second magnetic conductor fixing part 21a1 and the first magnetic conductor fixing part 21a2 are distributed along the direction from the first edge part 211b to the second edge part 211a of the base plate 211. The annular clamp 22 is rectangular, and the two opposite rod segments include straight rod segments, which respectively form the first clamp positioning part 22b1 and the second clamp positioning part 22b2. The other two opposite rod segments are the first clamp fixing part 21a1 and the second clamp fixing part 21a2. When assembling the clamp 22 with the magnetic conductor 21, the first clamp fixing part 22a1 and the second clamp fixing part 22a2 of the clamp 22 are respectively inserted into the slots of the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2 of the magnetic conductor 21. The clamp 22 and the magnetic conductor 21 will not move or slide relative to each other. During installation, an external force can be applied to deform the clamp 22, allowing the first clamp fixing part 22a1 and the second clamp fixing part 22a2 to move closer together and be positioned between the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2. After the external force is removed, the first clamp fixing part 22a1 and the second clamp fixing part 22a2 will move away from each other under the rebound action and be inserted into the slots of the corresponding magnetic conductor fixing parts. It can be seen that the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2 can also have a certain degree of elasticity, for example, being lifted under the action of an external force to facilitate the insertion of the clamp fixing parts. Figure 16In the middle, the outer surfaces of the first magnetic conductor fixing part 21a1 and the second magnetic conductor fixing part 21a2 are guide surfaces, which can guide the corresponding clamp fixing part to be inserted into the corresponding magnetic conductor fixing part.

[0074] It should also be understood that the clamp 22 in this embodiment is a closed ring. The ring-shaped clamp can also be designed according to the bending design in the first embodiment, that is, it is also bent to form the first part 221 corresponding to the base plate 211 and the second part 222 corresponding to the side plate 212. The bending design is also applicable to other embodiments of this application. The first embodiment provides three magnetic conductor fixing parts and three clamp fixing parts. The second embodiment provides two magnetic conductor fixing parts and two clamp fixing parts. It should be understood that at least two or more magnetic conductor fixing parts and corresponding clamp fixing parts should be provided to achieve the purpose of fixing. The number is not limited. The specific number can be set to facilitate the purpose of snapping and achieving the purpose of fixing.

[0075] In this embodiment, the structure of the valve body 10 is the same as that in the first embodiment, see... Figure 19 The installation of the electromagnetic coil 20 and the valve body 10 is the same as the locking and fixing method in the first embodiment. The first clamp locking part 22b1 and the second clamp locking part 22b2 slide into the corresponding first locking groove 12a1 and second locking groove 12a2 along the pressing guide part 21b.

[0076] Example 3

[0077] Please refer to Figure 20-23 , Figure 20 This is a schematic diagram showing the connection between the magnetic conductor 21 and the clamp 22 of the solenoid valve in the third embodiment of this application; Figure 21 for Figure 20 Schematic diagram of clamp 22; Figure 22 for Figure 21 Top view of clamp 22; Figure 23 This is an axial sectional view of the connection position between the clamp 22 and the valve body 10 in the third embodiment of this application.

[0078] In this embodiment, the clamp 22 is basically the same as in the second embodiment, except that it has an opening 22a to allow for greater deformation. The clamp 22 in the second embodiment can also have an opening, and the location of the opening is not limited. Furthermore, after the clamp 22 in this embodiment is installed onto the magnetic conductor 21, the center of the clamp 22 and the central axis of the solenoid valve are offset. The fixing method of the clamp 22 and the magnetic conductor 21 is the same as in the second embodiment. Figure 21As shown, the structure of the valve seat 12 of the valve body 10 in this embodiment is basically the same as that in the above embodiment, but only a single locking groove is used, that is, only the first locking groove 12a1 is provided. One of the two rod segments opposite the clamp 22 is the first clamp locking part 22b1, and the other rod segment 22b3 is not used as a locking part. After the valve body 10 and the electromagnetic coil 20 are assembled, the first clamp locking part 22b1 of the clamp 22 engages and is fixed with the first locking groove 12a1 of the valve seat 12.

[0079] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A solenoid valve, characterized in that, The device includes a clamp, a valve seat, and a magnetic conductor. The clamp is fixedly connected or limited to the magnetic conductor. The clamp has a clamp locking part. The magnetic conductor includes a first part and a second part. The second part is closer to the valve seat than the first part. The second part has a lower end face. There is a preset distance between the clamp locking part and the lower end face. The valve seat has a locking groove. The clamp locking part is at least partially limited in the locking groove. The outer peripheral wall of the valve seat is provided with an annular groove, a portion of which is the locking groove and the remaining portion is the anti-disengagement groove. The axial height and radial depth of the locking groove are both greater than the axial height and radial depth of the anti-disengagement groove. The clamp is provided with a clamp locking part, which can be locked into the locking groove or the anti-disengagement groove to fix the valve seat and the clamp. The valve seat has a press-in guide at one end edge near the electromagnetic coil. The press-in guide is an annular chamfer at the end edge of the valve seat.

2. The solenoid valve according to claim 1, characterized in that, The annular groove includes at least one set of the locking grooves, and the set of locking grooves includes two locking grooves arranged radially symmetrically; the clamp is provided with two clamp locking parts, and the two clamp locking parts correspond to the set of the locking grooves; or, the annular groove is provided with one locking groove, and the clamp is provided with one clamp locking part.

3. The solenoid valve according to claim 2, characterized in that, The locking groove and the anti-disengagement groove have a V-shaped or U-shaped cross-section along the radial direction of the valve seat.

4. The solenoid valve according to claim 2, characterized in that, The locking groove and the anti-detachment groove are smoothly connected in the circumferential direction.

5. The solenoid valve according to any one of claims 1-4, characterized in that, The clamp is formed by bending metal wire. The clamp has at least two clamp fixing parts. The magnetic conductor has a magnetic conductor fixing part. The magnetic conductor fixing part is a buckle with a slot. The clamp fixing part is locked into the slot for fixation.

6. The solenoid valve according to claim 5, characterized in that, The clamp is U-shaped, or a closed ring, or a ring with an opening.

7. The solenoid valve according to claim 6, characterized in that, The clamp is bent to form a first part and a second part. The first part of the clamp is located outside the second part of the magnetic conductor, and the second part of the clamp is located outside the first part of the magnetic conductor.

8. The solenoid valve according to claim 7, characterized in that, The clamp is U-shaped, with its two free ends extending to both sides to form two clamp fixing parts. The bottom of the clamp is recessed inward to form a recess, which is one clamp fixing part.

9. The solenoid valve according to claim 5, characterized in that, The lower end of the second part of the magnetic conductor is provided with a magnetic conductor fixing part with opposing bayonets. The clamp is a closed ring or a ring with an opening. The clamp includes two clamp segments arranged opposite each other, both of which form the clamp fixing part.

10. The solenoid valve according to any one of claims 1-4, characterized in that, The valve seat is machined.

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