Valve element structure

Abstract

The utility model belongs to the technical field of electromagnetic valves, and discloses a valve core structure which comprises a shell sleeve, a valve body and an electromagnet, a telescopic hole is formed in the shell sleeve, a limiting boss is arranged on the inner wall of the telescopic hole in a protruding mode, the valve body comprises an armature and a movable iron core, and the armature is fixedly connected to the movable iron core and connected to the telescopic hole in a sliding mode. The periphery of the armature is correspondingly provided with a limiting sliding groove used for being in sliding connection with the limiting boss, the limiting sliding groove extends in the axial direction of the telescopic hole, the electromagnet is arranged on the shell sleeve, the armature is located between the electromagnet and the movable iron core, and magnetic attraction force generated when the electromagnet is powered on attracts the armature so as to drive the valve body to slide in the telescopic hole in the direction close to the electromagnet. The limiting boss slides in the limiting sliding groove. The valve core structure provided by the utility model is simple in structure, effectively prevents the valve body from rotating and deviating, and ensures the performance consistency and the use reliability of the electromagnetic valve.

Description

Technical Field

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

[0002] Solenoid valves are widely used in industrial control systems as a control device. They are basic components for fluid automation and are used to adjust a series of parameters such as the direction, flow rate, and flow velocity of the medium. Solenoid valves achieve the opening and closing functions through the reciprocating motion of the valve core, and the service life of the reciprocating motion is usually set to hundreds of millions of times.

[0003] In the prior art, due to the existence of assembly errors and processing errors, the flatness of the top surface of the armature and the limit point of the limit sleeve cannot achieve zero deviation. During the long-term use of the solenoid valve, the valve body of the solenoid valve will experience rotational deviation, affecting the performance consistency and reliability of the solenoid valve and reducing the service life of the solenoid valve. Utility Model Content

[0004] The utility model aims to provide a valve core structure, which can effectively avoid the rotation deviation of the valve body and ensure the performance consistency and use reliability of the solenoid valve.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A valve core structure, comprising:

[0007] The shell is provided with a telescopic hole, and a limiting boss is protruding from the inner wall of the telescopic hole;

[0008] The valve body comprises an armature and a movable iron core, wherein the armature is fixedly connected to the movable iron core, the armature is slidably connected to the telescopic hole, and a limiting sliding groove for slidingly connecting with the limiting boss is correspondingly opened on the peripheral side of the armature, and the limiting sliding groove extends along the axial direction of the telescopic hole;

[0009] An electromagnet is disposed on the housing, and the armature is located between the electromagnet and the moving iron core;

[0010] The magnetic attraction force generated when the electromagnet is energized attracts the armature to drive the valve body to slide in the telescopic hole toward the electromagnet, and the limiting boss slides in the limiting sliding groove.

[0011] Preferably, the valve body also includes a limit flange fixedly connected to the moving iron core, the shell sleeve is provided with a limit groove connected to the telescopic hole, a buffer member is provided in the limit groove, and the limit flange is suitable for abutting against the buffer member when the valve body slides to an extreme position toward the direction close to the electromagnet.

[0012] Preferably, the buffer member includes a buffer ring, a ring-shaped receiving groove is formed at the bottom of the limiting groove, the buffer ring is embedded in the receiving groove, and the thickness of the buffer ring is greater than the depth of the receiving groove.

[0013] Preferably, the numerical range of the thickness of the buffer ring being greater than the depth of the receiving groove is: 0.03 mm - 0.05 mm.

[0014] Preferably, the material of the buffer member is set as rubber.

[0015] Preferably, the telescopic hole includes a first hole portion and a second hole portion that are connected in a stepped manner, the aperture of the first hole portion is larger than the aperture of the second hole portion, and a first limiting end face is connected between the first hole portion and the second hole portion;

[0016] The armature includes a first core portion and a second core portion that are arranged in a stepped manner, the diameter of the first core portion is larger than the diameter of the second core portion, the first core portion is slidably connected to the first hole portion, and a second limiting end face is connected between the first core portion and the second core portion;

[0017] When the valve body slides to the extreme position in the direction away from the electromagnet, the first limiting end face abuts against the second limiting end face.

[0018] Preferably, the limiting sliding groove is formed in the first core portion, and the limiting boss is arranged in the first hole portion.

[0019] Preferably, the armature is provided with a first insertion groove, and the moving iron core is fixedly inserted into the first insertion groove.

[0020] Preferably, the limiting flange is provided with a through hole, and the limiting flange is fixedly sleeved on the moving iron core through the through hole.

[0021] Preferably, a plurality of the limiting sliding grooves and the limiting bosses are arranged in one-to-one correspondence.

[0022] Advantageous effects:

[0023] For the spool structure provided by the present utility model, when the electromagnet is energized, it generates a magnetic suction force, which can attract the armature and drive the valve body to slide in the telescopic hole in the direction close to the electromagnet. During the process, the limiting boss slides in the limiting sliding groove, so as to ensure that the valve body slides and extends strictly in the housing sleeve, avoid the rotation and offset of the armature and the moving iron core, that is, the valve body relative to the housing sleeve, ensure the performance consistency and use reliability of the solenoid valve, and effectively ensure the service life of the solenoid valve. Description of the drawings

[0024] Figure 1It is a schematic cross-sectional view of the spool structure provided by the present utility model;

[0025] Figure 2 It is a schematic cross-sectional view of the shell sleeve and the limit flange part provided by the present utility model;

[0026] Figure 3 It is the present utility model in Figure 2 The partial enlarged schematic view of part A;

[0027] Figure 4 It is a schematic structural view of the shell sleeve from one perspective provided by the present utility model;

[0028] Figure 5 It is a schematic structural view of the shell sleeve from another perspective provided by the present utility model;

[0029] Figure 6 It is a schematic structural view of the armature provided by the present utility model;

[0030] Figure 7 It is a schematic structural view of the buffer ring provided by the present utility model.

[0031] In the figure:

[0032] 1. Shell sleeve; 11. Telescopic hole; 111. First hole part; 112. Second hole part; 113. First limit end face; 12. Limit boss; 13. Limit groove; 131. Accommodating groove; 14. Buffer member;

[0033] 2. Valve body; 21. Armature; 211. First core part; 212. Second core part; 213. Second limit end face; 214. First insertion slot; 22. Moving iron core; 23. Limit sliding groove; 24. Limit flange;

[0034] 3. Electromagnet. Detailed implementation manners

[0035] The following further elaborates on the present utility model in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0036] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] This embodiment provides a spool structure. This spool structure is used for an electromagnetic valve, and the electromagnetic valve is used in a fuel cell system to provide high-speed gas for an ejector to improve the performance of the ejector.

[0040] Refer to Figures 1 to 7 As shown, the spool structure includes a housing sleeve 1, a valve body 2, and an electromagnet 3. The housing sleeve 1 is provided with a telescopic hole 11, and a limiting boss 12 is protrudingly provided on the inner wall of the telescopic hole 11. The valve body 2 includes an armature 21 and a moving iron core 22. The armature 21 is fixedly connected to the moving iron core 22. The armature 21 is slidably connected to the telescopic hole 11. A limiting sliding groove 23 for slidably connecting with the limiting boss 12 is correspondingly provided on the periphery of the armature 21. The limiting sliding groove 23 extends along the axial direction of the telescopic hole 11. The electromagnet 3 is provided on the housing sleeve 1. The armature 21 is located between the electromagnet 3 and the moving iron core 22. When the electromagnet 3 is energized, the magnetic attraction force generated attracts the armature 21 to drive the valve body 2 to slide in the telescopic hole 11 towards the direction close to the electromagnet 3, and the limiting boss 12 slides in the limiting sliding groove 23.

[0041] In this embodiment, when the electromagnet 3 is energized, it generates a magnetic suction force, which can attract the armature 21 and drive the valve body 2 to slide in the telescopic hole 11 in the direction close to the electromagnet 3. During this process, the limiting boss 12 slides in the limiting chute 23, so as to ensure that the valve body 2 slides and expands strictly in the housing sleeve 1, avoiding the rotation and deviation of the armature 21 and the moving iron core 22, that is, the valve body 2 relative to the housing sleeve 1, ensuring the performance consistency and use reliability of the solenoid valve, and effectively ensuring the service life of the solenoid valve.

[0042] In this embodiment, the electromagnet 3 is fixedly connected to the housing sleeve 1.

[0043] In this embodiment, when the valve body 2 slides to the limit position in the direction close to the electromagnet 3, the solenoid valve opens to the maximum opening; when the valve body 2 slides to the limit position in the direction away from the electromagnet 3, the solenoid valve closes.

[0044] In this embodiment, the valve body 2 further includes a limiting flange 24 fixedly connected to the moving iron core 22. The housing sleeve 1 is provided with a limiting groove 13 communicating with the telescopic hole 11, and a buffer member 14 is arranged in the limiting groove 13. The limiting flange 24 is adapted to abut against the buffer member 14 when the valve body 2 slides to the limit position in the direction close to the electromagnet 3. Specifically, the arrangement of the limiting flange 24 is used to abut against the buffer member 14 when the valve body 2 slides to the limit position in the direction close to the electromagnet 3, so as to provide sliding limitation. The arrangement of the buffer member 14 can slow down the collision wear and impact between the limiting flange 24 and the bottom of the limiting groove 13, that is, the housing sleeve 1, avoid the structural deformation of the collision part of the limiting groove 13 under the long-term operation of the solenoid valve, and avoid affecting the limiting distance.

[0045] In this embodiment, the buffer member 14 includes a buffer ring. A circular accommodating groove 131 is opened at the bottom of the limiting groove 13, and the buffer ring is embedded in the accommodating groove 131, and the thickness of the buffer ring is greater than the depth of the accommodating groove 131. Specifically, the buffer ring protrudes out of the accommodating groove 131. Such a setting ensures that only the limiting flange 24 contacts the buffer ring, avoiding simultaneous collision and contact with other parts of the housing sleeve 1 such as the limiting groove 13.

[0046] Optionally, the numerical range of the thickness of the buffer ring being greater than the depth of the accommodating groove 131 is: 0.03 mm - 0.05 mm. As some alternative embodiments, the numerical values of the thickness of the buffer ring being greater than the depth of the accommodating groove 131 can be 0.03 mm, 0.035 mm, 0.04 mm, 0.045 mm, 0.05 mm.

[0047] Optionally, the material of the buffer member 14 is set as rubber. Rubber has reliable buffer performance and low cost and is easy to produce.

[0048] Optionally, vulcanization treatment is performed on the part of the accommodating groove 131 to reduce the structural deformation of the contact part.

[0049] Optionally, the buffer ring can adopt a PEEK structure, and such a setting can achieve the weight reduction effect of the injector.

[0050] In this embodiment, the telescopic hole 11 includes a first hole portion 111 and a second hole portion 112 that are connected in a stepped manner. The aperture of the first hole portion 111 is larger than that of the second hole portion 112. A first limiting end face 113 is connected between the first hole portion 111 and the second hole portion 112. The armature 21 includes a first core portion 211 and a second core portion 212 that are arranged in a stepped manner. The diameter of the first core portion 211 is larger than that of the second core portion 212. The first core portion 211 is slidably connected to the first hole portion 111. A second limiting end face 213 is connected between the first core portion 211 and the second core portion 212. When the valve body 2 slides towards the direction away from the electromagnet 3 to the extreme position, the first limiting end face 113 abuts against the second limiting end face 213. Specifically, when the valve body 2 slides towards the direction away from the electromagnet 3 to the extreme position, that is, when the valve body 2 is closed, the first limiting end face 113 abuts against the second limiting end face 213.

[0051] Specifically, an elastic resetting member (not shown) is further provided between the moving iron core 22 and the housing sleeve 1. The elastic resetting member always makes the moving iron core 22 have a tendency to slide the valve body 2 towards the direction away from the electromagnet 3 and reset. Specifically, when the electromagnet 3 is powered off, the magnetic attraction force disappears, and the attraction to the armature 21 is cancelled. The moving iron core 22 slides towards the direction away from the electromagnet 3 under the action of the elastic resetting member, and finally the entire valve body 2 is reset, and the solenoid valve is closed.

[0052] Optionally, the elastic resetting member is set as a spring.

[0053] Specifically, the limiting chute 23 is opened on the first core portion 211, and the limiting boss 12 is arranged on the first hole portion 111.

[0054] Specifically, the armature 21 is provided with a first insertion groove 214, and the moving iron core 22 is fixedly inserted into the first insertion groove 214. Specifically, the moving iron core 22 is inserted into the first slot in an interference fit manner to ensure the reliable fixation between the armature 21 and the moving iron core 22.

[0055] Specifically, the limiting flange 24 is provided with a through hole, and the limiting flange 24 is fixedly sleeved on the moving iron core 22 through the through hole. Specifically, the cooperation relationship between the through hole and the moving iron core 22 is an interference fit to ensure the reliable fixation between the limiting flange 24 and the moving iron core 22.

[0056] Optionally, a plurality of limiting sliding grooves 23 and limiting bosses 12 are provided in one-to-one correspondence. In this embodiment, two limiting sliding grooves 23 and two limiting bosses 12 are provided in one-to-one correspondence. Specifically, the two limiting sliding grooves 23 are arranged on the valve body 2 at an interval of 180°, and the two limiting bosses 12 are arranged on the armature 21 at an interval of 180°.

[0057] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A spool structure, characterized in that, Comprising: A housing sleeve (1) is provided with a telescopic hole (11), and a limiting boss (12) is protrudingly provided on the inner wall of the telescopic hole (11); A valve body (2) includes an armature (21) and a moving iron core (22), the armature (21) is fixedly connected to the moving iron core (22), the armature (21) is slidably connected to the telescopic hole (11), a limiting chute (23) for slidably connecting with the limiting boss (12) is correspondingly provided on the circumferential side of the armature (21), and the limiting chute (23) extends along the axial direction of the telescopic hole (11); An electromagnet (3) is arranged on the housing sleeve (1), and the armature (21) is located between the electromagnet (3) and the moving iron core (22); When the electromagnet (3) is energized, the magnetic suction force generated attracts the armature (21) to drive the valve body (2) to slide in the telescopic hole (11) towards the direction close to the electromagnet (3), and the limiting boss (12) slides in the limiting chute (23).

2. The spool structure according to claim 1, wherein, The valve body (2) further includes a limiting flange (24) fixedly connected to the moving iron core (22), the housing sleeve (1) is provided with a limiting groove (13) communicated with the telescopic hole (11), a buffer member (14) is arranged in the limiting groove (13), and the limiting flange (24) is adapted to abut against the buffer member (14) when the valve body (2) slides towards the direction close to the electromagnet (3) to the limit position.

3. The spool structure according to claim 2, wherein, The buffer member (14) includes a buffer ring, a ring-shaped receiving groove (131) is provided at the bottom of the limiting groove (13), the buffer ring is embedded in the receiving groove (131), and the thickness of the buffer ring is greater than the depth of the receiving groove (131).

4. The spool structure according to claim 3, characterized in that, The numerical range of the thickness of the buffer ring being greater than the depth of the receiving groove (131) is: 0.03 mm - 0.05 mm.

5. The spool structure according to claim 2, characterized in that, The material of the buffer member (14) is set as rubber.

6. The spool structure according to claim 1, characterized in that, The telescopic hole (11) includes a first hole portion (111) and a second hole portion (112) which are connected in a stepped manner, the aperture of the first hole portion (111) is larger than the aperture of the second hole portion (112), and a first limiting end face (113) is connected between the first hole portion (111) and the second hole portion (112); The armature (21) includes a first core portion (211) and a second core portion (212) which are arranged in a stepped manner, the diameter of the first core portion (211) is larger than the diameter of the second core portion (212), the first core portion (211) is slidably connected to the first hole portion (111), and a second limiting end face (213) is connected between the first core portion (211) and the second core portion (212); When the valve body (2) slides towards the direction away from the electromagnet (3) to the limit position, the first limiting end face (113) abuts against the second limiting end face (213).

7. The spool structure according to claim 6, characterized in that, The limiting chute (23) is provided on the first core portion (211), and the limiting boss (12) is arranged on the first hole portion (111).

8. The spool structure according to claim 1, characterized in that The armature (21) is provided with a first insertion slot (214), and the moving iron core (22) is fixedly inserted into the first insertion slot (214).

9. The spool structure according to claim 2, wherein The limiting flange (24) is provided with a through hole, and the limiting flange (24) is fixedly sleeved on the moving iron core (22) through the through hole.

10. The spool structure according to claim 1, characterized in that, A plurality of the limiting sliding grooves (23) and the limiting convex platforms (12) are arranged in one-to-one correspondence.

Images