Novel electromagnetic valve

Abstract

The utility model discloses a novel electromagnetic valve, which relates to the technical field of electromagnetic valves and comprises an electromagnetic valve body, an air seal of the electromagnetic valve body comprises a supporting ring body, a first sealing ring and a second sealing ring, the supporting ring body is annularly arranged on the periphery of a valve core of the electromagnetic valve body, and the supporting ring body is embedded at one end, close to the valve core, of a pole shoe of the electromagnetic valve body. A first sealing ring and a second sealing ring are arranged at the two axial ends of the supporting ring body respectively, the first sealing ring is arranged close to the pole shoe, the inner edge of the first sealing ring and the inner edge of the second sealing ring abut against the peripheral wall of the valve element, and an annular protrusion used for achieving the sealing effect is arranged on the end face, close to the pole shoe, of the first sealing ring. The annular protrusion abuts against the pole shoe. Radial sealing between the end, away from the valve element, of the air seal and the pole shoe is omitted, axial sealing is formed between the annular protrusion and the pole shoe, the roughness of the axial face is easier to control compared with a radial face, the technical requirement is low, and therefore the sealing effect can be effectively improved.

Description

Technical Field

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

[0002] The solenoid valve is a commonly used automation device for controlling fluids. It mainly uses the cooperation of electromagnetics and springs to control the movement of the internal valve core toward or away from the valve body, thereby achieving control over the opening and closing of the valve body.

[0003] Since the valve core moves in the fluid cavity and the valve core needs to be connected to the moving iron core through a push rod, in order to prevent the fluid from entering the moving iron core, an annular seal needs to be provided around the valve core. The annular seal commonly used in the field of solenoid valves is an air seal. The end of the air seal close to the valve core can radially abut the valve core to complete the sealing. However, the end of the air seal commonly used in the field that is far away from the valve core also adopts the method of radially abutting the inner wall of the pole shoe to complete the sealing. However, in actual production, the roughness of the inner wall of the pole shoe is difficult to control, which has high technical requirements and is prone to poor sealing effects.

[0004] Therefore, people are in urgent need of a new type of electromagnetic valve with good sealing effect. Summary of the invention

[0005] The utility model aims to provide a new type of solenoid valve to solve the problems existing in the above-mentioned prior art, and utilizes an annular protrusion to complete axial sealing, which is beneficial to improving the sealing effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a new type of solenoid valve, including a solenoid valve body, the air seal of the solenoid valve body includes a support ring body, a first sealing ring and a second sealing ring, the support ring body is arranged around the valve core of the solenoid valve body, the support ring body is embedded in the pole shoe of the solenoid valve body close to one end of the valve core, the support ring body is respectively provided with the first sealing ring and the second sealing ring along its axial ends, the first sealing ring is arranged close to the pole shoe, the inner edges of the first sealing ring and the second sealing ring are both abutted against the outer peripheral wall of the valve core, the first sealing ring is provided with an annular protrusion for sealing on the end face of the first sealing ring close to the pole shoe, and the annular protrusion abuts against the pole shoe.

[0007] Preferably, the inner diameters of the first sealing ring and the second sealing ring are smaller than the outer diameter of the valve core.

[0008] Preferably, the inner diameter of the support ring body is the same as the outer diameter of the valve core.

[0009] Preferably, the support ring body is an aluminum support ring body.

[0010] Preferably, the support ring body is provided with a plurality of axially penetrating through holes in the circumferential direction, and the first sealing ring and the second sealing ring are connected via connecting columns provided in the through holes.

[0011] Preferably, the connecting column, the first sealing ring and the second sealing ring are integrally arranged.

[0012] Preferably, annular positioning grooves are provided at both axial ends of the support ring body, and annular positioning pieces are provided at the first sealing ring and the second sealing ring corresponding to the annular positioning grooves, and the annular positioning pieces are located in the annular positioning grooves.

[0013] Preferably, annular grooves are provided at positions of the valve core corresponding to the first sealing ring and the second sealing ring.

[0014] Preferably, the valve core is connected to the moving iron core of the solenoid valve body through a push rod, an axial through hole is provided on the moving iron core, the push rod is transitionally matched with the axial through hole, and one end of the push rod away from the valve core is welded to the other end of the moving iron core away from the valve core.

[0015] Preferably, the annular opening formed by the inner edge of the first sealing ring and the inner edge of the second sealing ring is a flared structure.

[0016] Compared with the prior art, the utility model mainly achieves the following technical effects:

[0017] The radial seal between the end of the gas seal away from the valve core and the pole shoe is eliminated, and an axial seal is formed between the annular protrusion and the pole shoe. The roughness of the axial surface is easier to control than that of the radial surface, and the technical requirements are lower, so the sealing effect can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 This is a schematic diagram of the structure of the solenoid valve body of the utility model;

[0020] Figure 2 It is a cross-sectional view of the solenoid valve body of the utility model;

[0021] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0022] Figure 4This is a schematic diagram of the structure of the gas seal of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the first sealing ring, the second sealing ring and the connecting column of the utility model;

[0024] Among them, 1. plug cap; 2. plug; 3. pin; 4. electromagnet; 5. outer cover; 6. inner cover; 7. wire rack; 8. spring; 9. moving iron core; 10. push rod; 11. valve core; 12. pole shoe; 13. air seal; 14. valve body; 15. support ring body; 16. first sealing ring; 17. second sealing ring; 18. annular protrusion; 19. connecting column; 20. annular positioning groove; 21. annular positioning piece; 22. annular groove; 23. annular plug-in. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model aims to provide a novel electromagnetic valve to solve the problems existing in the prior art, and utilizes an annular protrusion to complete axial sealing, which is beneficial to improving the sealing effect.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Please refer to Figures 1 to 5As shown, a new type of solenoid valve is provided, including a solenoid valve body, the solenoid valve body includes a plug cap 1, a plug 2, a pin 3, an electromagnet 4, an outer cover 5, an inner cover 6, a wire rack 7, a spring 8, a moving iron core 9, a push rod 10, a valve core 11, a pole shoe 12, an air seal 13 and a valve body 14, the plug 2, the electromagnet 4, the wire rack 7, the pole shoe 12 and the valve body 14 are arranged in the outer cover 5 from top to bottom, and a cylindrical cavity is formed in the middle, and the inner cover is arranged in the cylindrical cavity from top to bottom. 6, a moving iron core 9, a push rod 10 and a valve core 11, a space for the valve core 11 to move is provided at the bottom of the pole shoe 12, an air seal 13 is arranged between the valve core 11 and the pole shoe 12, and the push rod 10 passes through the pole shoe 12 to connect with the valve core 11, and a spring 8 is arranged in a spring cavity between the moving iron core 9 and the pole shoe 12, for providing a reset force for the moving iron core 9; in this embodiment, the air seal 13 includes a support ring body 15, a first sealing ring 16 and a second sealing ring 17, and the support ring body 15 is arranged around Around the valve core 11, a support ring body 15 is embedded in one end of the pole shoe 12 close to the valve core 11. The support ring body 15 is respectively provided with a first sealing ring 16 and a second sealing ring 17 along its axial ends. The first sealing ring 16 is arranged close to the pole shoe 12. The inner edges of the first sealing ring 16 and the second sealing ring 17 are both in contact with the outer peripheral wall of the valve core 11 to complete the radial sealing of the valve core 11. The end surface of the first sealing ring 16 close to the pole shoe 12 is provided with an annular convex The annular protrusion 18 abuts against the pole shoe 12. Specifically, the valve core 11 moves in the inner cavity of the pole shoe 12. The inner circumferential wall of the pole shoe 12 is arranged in a stepped shape. The small diameter section is arranged farther away from the valve core 11 than the large diameter section. The support ring body 15 is arranged in the large diameter section. The annular protrusion 18 abuts against the axial step surface between the small diameter section and the large diameter section to form an axial seal. The roughness of the axial surface is easier to control than that of the radial surface, and the technical requirements are lower. Therefore, the sealing effect can be effectively improved.

[0029] The specific positioning method of the support ring body 15 is as follows: the outer diameter of the support ring body 15 is the same as the inner diameter of the large diameter section of the pole shoe 12, and an annular slot is arranged on the end face of the support ring body 15 close to the valve body 14, and the outer diameter of the annular slot is the same as the inner diameter of the large diameter section of the pole shoe 12; an annular plug-in 23 is arranged on the end of the valve body 14 close to the pole shoe 12, and the annular plug-in 23 is inserted in the annular slot, which can not only complete the center positioning of the valve body 14, but also provide support for the support ring body 15.

[0030] Preferably, the outer diameter of the first sealing ring 16 is the same as the inner diameter of the large diameter section of the pole piece 12, and the outer diameter of the second sealing ring 17 is the same as the inner diameter of the annular insert 23, so as to limit the first sealing ring 16 and the second sealing ring 17 in radial direction.

[0031] The cross section of the annular protrusion 18 may be semicircular, triangular, trapezoidal, etc.

[0032] The inner diameter of the first sealing ring 16 and the second sealing ring 17 is smaller than the outer diameter of the valve core 11 to improve the sealing effect. In this embodiment, the inner diameter of the support ring body 15 is set to be the same as the outer diameter of the valve core 11, which improves the assembly stability of the support ring body 15 and guides the movement of the valve core 11.

[0033] In this embodiment, the support ring body 15 is an aluminum support ring body, and the support ring body 15 can also be made of other materials as needed.

[0034] In order to improve the connection stability between the first sealing ring 16 and the second sealing ring 17 and the support ring body 15, a plurality of axially penetrating through holes are arranged in the circumference of the support ring body 15, and the first sealing ring 16 and the second sealing ring 17 are connected by a connecting column 19 arranged in the through hole. The connecting column 19 can further improve the radial limiting effect of the first sealing ring 16 and the second sealing ring 17.

[0035] In this embodiment, the connecting column 19, the first sealing ring 16 and the second sealing ring 17 are integrally arranged. Specifically, two-step injection molding can be performed when producing the air seal 13. First, the support ring body 15 with a through hole is injection molded, and then the connecting column 19, the first sealing ring 16 and the second sealing ring 17 are injection molded based on the support ring body 15 with a through hole.

[0036] Annular positioning grooves 20 are provided at both axial ends of the support ring body 15, and annular positioning members 21 are provided corresponding to the annular positioning grooves 20 of the first sealing ring 16 and the second sealing ring 17. The annular positioning member 21 is located in the annular positioning groove 20. The cooperation between the annular positioning member 21 and the annular positioning groove 20 can further improve the radial limiting effect of the first sealing ring 16 and the second sealing ring 17.

[0037] The annular positioning member 21 is integrally provided with the first sealing ring 16 or the second sealing ring 17 .

[0038] Annular grooves 22 are provided at positions of the valve core 11 corresponding to the first sealing ring 16 and the second sealing ring 17. When the valve core 11 does not seal the valve body 14, the annular groove 22 is provided corresponding to the sealing lip of the first sealing ring 16 or the second sealing ring 17. When the valve core 11 seals the valve body 14, the annular groove 22 and the sealing lip are offset. In this way, when the valve core 11 seals the valve body 14, the deformation of the sealing lip will increase, thereby improving the sealing effect.

[0039] The annular groove 22 and the valve core 11 are integrally formed, which can reduce the number of steps compared to subsequent engraving and forming.

[0040] In this embodiment, an axial through hole is provided on the moving iron core 9 , and the push rod 10 is transitionally matched with the axial through hole. One end of the push rod 10 away from the valve core 11 is welded to another end of the moving iron core 9 away from the valve core 11 .

[0041] In this embodiment, the annular opening formed by the inner edge of the first sealing ring 16 and the inner edge of the second sealing ring 17 is a flared structure.

[0042] Adaptive changes made according to actual needs are all within the protection scope of this utility model.

[0043] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0044] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A new type of solenoid valve, comprising a solenoid valve body, characterized in that: The air seal of the solenoid valve body includes a supporting ring body, a first sealing ring and a second sealing ring. The supporting ring body is arranged around the valve core of the solenoid valve body, and the supporting ring body is embedded in one end of the pole shoe of the solenoid valve body close to the valve core. The supporting ring body is respectively provided with the first sealing ring and the second sealing ring along its axial ends. The first sealing ring is arranged close to the pole shoe, and the inner edges of the first sealing ring and the second sealing ring are both abutted against the outer peripheral wall of the valve core. An annular protrusion for sealing is arranged on the end face of the first sealing ring close to the pole shoe, and the annular protrusion abuts against the pole shoe.

2. The new solenoid valve according to claim 1 is characterized in that: The inner diameters of the first sealing ring and the second sealing ring are smaller than the outer diameter of the valve core.

3. The new solenoid valve according to claim 1 is characterized in that: The inner diameter of the support ring body is the same as the outer diameter of the valve core.

4. The new solenoid valve according to claim 1 is characterized in that: The support ring body is an aluminum support ring body.

5. The new solenoid valve according to claim 1 is characterized in that: The support ring body is provided with a plurality of axially penetrating through holes in the circumferential direction, and the first sealing ring and the second sealing ring are connected via connecting columns provided in the through holes.

6. The new solenoid valve according to claim 5 is characterized in that: The connecting column, the first sealing ring and the second sealing ring are integrally arranged.

7. The new solenoid valve according to claim 5 is characterized in that: Annular positioning grooves are arranged at two axial ends of the support ring body, and annular positioning pieces are arranged on the first sealing ring and the second sealing ring corresponding to the annular positioning grooves, and the annular positioning pieces are located in the annular positioning grooves.

8. The new solenoid valve according to claim 1 is characterized in that: The valve core is provided with annular grooves at positions corresponding to the first sealing ring and the second sealing ring.

9. The new solenoid valve according to claim 1 is characterized in that: The valve core is connected to the moving iron core of the electromagnetic valve body through a push rod. The moving iron core is provided with an axial through hole. The push rod is transitionally matched with the axial through hole. One end of the push rod away from the valve core is welded to the other end of the moving iron core away from the valve core.

10. The new solenoid valve according to claim 1 is characterized in that: The annular opening formed by the inner edge of the first sealing ring and the inner edge of the second sealing ring is a flared structure.

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