Electromagnetic valve sealing structure

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve sealing structure which comprises a piston seat connected with a valve body, a movable iron core set arranged in a sliding mode in the axial direction relative to the piston seat and an electromagnetic coil used for driving the movable iron core set to slide. The piston seat comprises a connector connected with the valve body and a guide rod allowing a valve needle of the movable iron core set to penetrate through, a first step shaft and a second step shaft are sequentially arranged on the connector in the direction away from the guide rod, and the diameter of the first step shaft is larger than that of the second step shaft. The valve body is provided with a first groove allowing the first step shaft to be embedded and a second groove allowing the second step shaft to be embedded, the first step shaft is matched with the first groove in a threaded connection mode, and a sealing ring is arranged on the second step shaft. According to the electromagnetic valve, the sealing ring is arranged below the threaded connection position, the dual-sealing effect is achieved, meanwhile, chippings generated at the threaded connection position can be prevented from entering the electromagnetic valve, normal work of the electromagnetic valve is effectively guaranteed, and the service life of the electromagnetic valve is prolonged.

Description

Technical Field

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

[0002] Existing solenoid valves consist of a magnetic isolation socket housing a movable and fixed core, along with an electromagnetic coil wrapped around the socket. The socket is connected to the valve body via threads. However, this threaded connection has limitations. It cannot guarantee a tight seal within the solenoid valve. Furthermore, during valve body rotation, debris can form at the threaded connection, potentially entering the solenoid valve and blocking the movable core. This blockage can ultimately cause the solenoid valve to malfunction, a condition known as a "frozen" state. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a solenoid valve sealing structure to effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a solenoid valve sealing structure, comprising: a piston seat connected to a valve body, a moving iron core group slidably arranged in the axial direction relative to the piston seat, and an electromagnetic coil for driving the moving iron core group to slide;

[0005] The piston seat includes a connector connected to the valve body and a guide rod for the valve needle of the movable iron core assembly to pass through. A first step shaft and a second step shaft are sequentially provided on the connector in a direction away from the guide rod. The diameter of the first step shaft is larger than the diameter of the second step shaft.

[0006] The valve body is provided with a first groove for the first step shaft to be embedded in and a second groove for the second step shaft to be embedded in, and the first step shaft is threadedly engaged with the first groove, and a sealing ring is provided on the second step shaft.

[0007] Furthermore, an avoidance groove is provided at the root of the first groove.

[0008] Furthermore, the diameter of the second groove is greater than the diameter of the second stepped shaft.

[0009] Furthermore, the thickness of the connector is less than the sum of the depths of the first groove and the second groove.

[0010] Furthermore, an annular groove for mounting the sealing ring is provided on the outer cylindrical surface of the second stepped shaft;

[0011] The diameter of the shaft section located near the end surface of the annular groove is smaller than the diameter of the shaft section located near the first step shaft of the annular groove.

[0012] Further, the width of the annular groove is greater than the diameter of the sealing ring.

[0013] Further, a first inner hole is provided at the center of the end face of the second stepped shaft.

[0014] Further, the upper surface of the connector is flush with the upper surface of the valve body.

[0015] Further, a sleeve is provided at one end of the piston seat close to the moving iron core group, and the moving iron core group is arranged in the sleeve and moves along the axial direction.

[0016] Further, the moving iron core group includes a piston head, a valve needle, a driving block and a first elastic member;

[0017] The driving block is located above the piston seat. One end of the valve needle is embedded in the driving block, and the other end passes through the piston seat to drive the piston head to close the valve body;

[0018] The first elastic member is placed in the driving block, and one end of the valve needle away from the piston head abuts against the first elastic member.

[0019] The beneficial effects of the present utility model are as follows: By arranging a sealing ring below the threaded connection position, the present utility model achieves a double sealing effect, and at the same time blocks the debris generated at the threaded connection from entering the interior of the solenoid valve, effectively ensuring the normal operation of the solenoid valve and extending the service life of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the sealing structure of the solenoid valve in the embodiment of the present utility model;

[0022] Figure 2 is Figure 1 a partial enlarged view of A in;

[0023] Figure 3 It is an exploded schematic structural diagram of the moving iron core group in the embodiment of the present utility model.

[0024] Reference numerals: 1, valve body; 11, first groove; 12, second groove; 13, avoidance groove; 2, piston seat; 21, connector; 21a, first stepped shaft; 21b, second stepped shaft; 21c, annular groove; 21d, first inner hole; 22, guide rod; 3, moving iron core group; 31, piston head; 32, valve needle; 33, driving block; 34, first elastic member; 4, electromagnetic coil; 5, sleeve; 6, sealing ring. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] As Figures 1 to 3 shown in the solenoid valve sealing structure, including: a piston seat 2 connected to the valve body 1, a moving iron core group 3 slidably arranged axially relative to the piston seat 2, and an electromagnetic coil 4 for driving the moving iron core group 3 to slide; the piston seat 2 includes a connector 21 connected to the valve body 1 and a guide rod 22 through which the valve needle 32 of the moving iron core group 3 passes. A first stepped shaft 21a and a second stepped shaft 21b are sequentially arranged on the connector 21 in the direction away from the guide rod 22, and the diameter of the first stepped shaft 21a is greater than the diameter of the second stepped shaft 21b;

[0029] The valve body 1 is provided with a first groove 11 for embedding the first stepped shaft 21a and a second groove 12 for embedding the second stepped shaft 21b, and the first stepped shaft 21a is in screw fit with the first groove 11, and a sealing ring 6 is provided on the second stepped shaft 21b.

[0030] In the present utility model, a sealing ring 6 is provided below the threaded connection position, achieving a double sealing effect. Meanwhile, it can prevent debris generated at the threaded connection from entering the interior of the solenoid valve, effectively ensuring the normal operation of the solenoid valve and extending its service life.

[0031] In the present utility model, an avoidance groove 13 is provided at the root of the first groove 11. When the connecting head 21 is screwed into the first groove 11, it can ensure that the threaded connection is in place and is helpful for the convenience of thread processing.

[0032] In the preferred embodiment, the diameter of the second groove 12 is larger than the diameter of the second stepped shaft 21b, which is helpful for reducing the friction during the rotation of the connecting head 21 and making it smoother when the connecting head 21 is screwed into the first groove 11.

[0033] In the preferred embodiment of the present utility model, the thickness of the connecting head 21 is less than the sum of the depths of the first groove 11 and the second groove 12, enabling the connecting head 21 to be completely embedded in the valve body 1 and enhancing the connection strength of the entire structure.

[0034] In the preferred embodiment of the present utility model, an annular groove 21c for installing the sealing ring 6 is provided on the outer cylindrical surface of the second stepped shaft 21b; the diameter of the shaft section of the annular groove 21c close to the end face is smaller than the diameter of the shaft section of the annular groove 21c close to the first stepped shaft 21a.

[0035] During the process of the second stepped shaft 21b being inserted into the second groove 12, due to the larger diameter of the upper end of the second stepped shaft 21b, the sealing ring 6 will be subjected to the pressure of the stepped surface, and the pressure will cause the sealing ring 6 to fit more closely against the sealing side wall, thereby improving the sealing effect.

[0036] As the preference of the above embodiment, the width of the annular groove 21c is larger than the diameter of the sealing ring 6. When the second stepped shaft 21b enters, it allows the sealing ring 6 to move axially within the annular groove 21c, reducing the friction between the sealing ring 6 and the groove wall, thereby extending the service life of the sealing ring 6.

[0037] In the present utility model, a first inner hole 21d is provided at the center position of the end face of the second stepped shaft 21b. Through the setting of the first inner hole 21d, during the process of the second stepped shaft 21b disengaging from the second groove 12, the abutting step at the end face of the second stepped shaft 21b will slightly converge towards the center, reducing the extrusion of the sealing ring 6, effectively avoiding the wear of the sealing ring 6, and extending the service life of the sealing ring 6.

[0038] In the present utility model, the upper surface of the connecting head 21 is flush with the upper surface of the valve body 1, improving the aesthetics and maintenance convenience of the solenoid valve.

[0039] In a preferred embodiment, a sleeve 5 is provided at one end of the piston seat 2 close to the moving iron core group 3. The moving iron core group 3 is arranged inside the sleeve 5 and moves along the axial direction. The movement of the moving iron core group 3 inside the sleeve 5 ensures the centering of the moving iron core group 3 during movement, reduces the resistance during movement, and thus improves the response speed of the solenoid valve.

[0040] In a preferred embodiment of the present utility model, the moving iron core group 3 includes a piston head 31, a valve needle 32, a driving block 33 and a first elastic member 34; the driving block 33 is located above the piston seat 2, one end of the valve needle 32 is embedded in the driving block 33, and the other end passes through the piston seat 2 to drive the piston head 31 to close the valve body 1; the first elastic member 34 is placed inside the driving block 33, and the end of the valve needle 32 far from the piston head 31 abuts against the first elastic member 34.

[0041] Through the combination of the piston head 31, the valve needle 32, the driving block 33 and the first elastic member 34, precise control of the valve body 1 can be achieved. One end of the valve needle 32 is embedded in the driving block 33, and the other end passes through the piston seat 2 to drive the piston head 31. When the electromagnetic coil 4 is energized, the generated magnetic force will quickly attract the iron core to move towards the coil direction, and then push the valve core to change its position, realizing the rapid control of the fluid passage and ensuring the accurate opening and closing of the valve.

[0042] Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A solenoid valve sealing structure, characterized in that, Comprising: A piston seat (2) connected to the valve body (1), a moving iron core group (3) slidably arranged axially relative to the piston seat (2), and an electromagnetic coil (4) for driving the sliding of the moving iron core group (3); The piston seat (2) includes a connection head (21) connected to the valve body (1) and a guide rod (22) through which the valve needle (32) of the moving iron core group (3) passes. A first stepped shaft (21a) and a second stepped shaft (21b) are sequentially arranged on the connection head (21) in a direction away from the guide rod (22). The diameter of the first stepped shaft (21a) is greater than the diameter of the second stepped shaft (21b); The valve body (1) is provided with a first groove (11) for embedding the first stepped shaft (21a) and a second groove (12) for embedding the second stepped shaft (21b). The first stepped shaft (21a) is in screw fit with the first groove (11), and a sealing ring (6) is arranged on the second stepped shaft (21b).

2. The solenoid valve sealing structure according to claim 1, wherein, An avoidance groove (13) is provided at the root of the first groove (11).

3. The solenoid valve sealing structure according to claim 1, characterized in that, The diameter of the second groove (12) is greater than the diameter of the second stepped shaft (21b).

4. The solenoid valve sealing structure according to claim 1, characterized in that, The thickness of the connection head (21) is less than the sum of the depths of the first groove (11) and the second groove (12).

5. The solenoid valve sealing structure according to claim 1, characterized in that, An annular groove (21c) for installing the sealing ring (6) is provided on the outer cylindrical surface of the second stepped shaft (21b); The diameter of the shaft section of the annular groove (21c) close to the end face is smaller than the diameter of the shaft section of the annular groove (21c) close to the first stepped shaft (21a).

6. The solenoid valve sealing structure according to claim 5, wherein, The width of the annular groove (21c) is greater than the diameter of the sealing ring (6).

7. The solenoid valve sealing structure according to claim 1, characterized in that, A first inner hole (21d) is provided at the center position of the end face of the second stepped shaft (21b).

8. The solenoid valve sealing structure according to claim 1, characterized in that, The upper surface of the connection head (21) is flush with the upper surface of the valve body (1).

9. The solenoid valve sealing structure according to claim 1, characterized in that, A sleeve (5) is provided at one end of the piston seat (2) close to the moving iron core group (3). The moving iron core group (3) is arranged in the sleeve (5) and moves along the axial direction.

10. The solenoid valve sealing structure according to claim 1, characterized in that, The moving iron core group (3) includes a piston head (31), a valve needle (32), a driving block (33), and a first elastic member (34); The driving block (33) is located above the piston seat (2). One end of the valve needle (32) is embedded in the driving block (33), and the other end passes through the piston seat (2) to drive the piston head (31) to close the valve body (1); The first elastic member (34) is placed in the driving block (33), and one end of the valve needle (32) away from the piston head (31) abuts against the first elastic member (34).

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