Solenoid valve

Abstract

The utility model relates to the technical field of valves, in particular to an electromagnetic valve. The electromagnetic valve comprises the valve sleeve, the valve element, the flux sleeve and the movable iron, the valve element is movably arranged in the valve sleeve, the flux sleeve is connected with the valve sleeve, the movable iron is movably arranged in the flux sleeve, the movable iron is connected with the valve element, the movable iron abuts against the valve sleeve for limiting in the first state, and the movable iron abuts against the valve sleeve for limiting in the second state. A positioning shoulder structure of the outer diameter of the valve element is omitted, the valve element is machined in a centerless grinding and through grinding mode, the machining efficiency of the valve element is improved, cost is reduced, and meanwhile the limiting problem of the valve element is solved.

Description

Technical Field

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

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators and are not limited to hydraulic or pneumatic systems.

[0003] The solenoid valve includes an electromagnetic drive mechanism, a valve sleeve and a valve core. The valve core is movably arranged in the valve sleeve. The electromagnetic drive mechanism drives the valve core to move to open or close the opening on the valve sleeve to achieve the purpose of controlling the flow of fluid in the solenoid valve.

[0004] In the prior art, to allow the valve core to move within the axial space of the valve sleeve, a limiting groove and a positioning shoulder are usually provided on the valve sleeve. Under the action of the electromagnetic drive mechanism, the valve core moves along the axial direction of the valve sleeve until the positioning shoulder on the valve core abuts against the limiting groove on the valve sleeve and is restrained, thereby limiting the maximum axial movement distance of the valve core within the valve sleeve to prevent the end of the valve core from extending too far from the valve sleeve. However, this results in a protruding positioning shoulder on the outer diameter of the valve core, which cannot be machined using the existing centerless grinding method. The valve core can only be machined by pressure grinding, resulting in low machining efficiency and unfavorable cost reduction.

[0005] Therefore, there is an urgent need for a solenoid valve to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a solenoid valve, which eliminates the positioning shoulder structure of the valve core outer diameter, realizes the valve core processing by centerless grinding, improves the processing efficiency of the valve core, reduces the cost, and solves the valve core limit problem.

[0007] To achieve the above objectives, the following technical solutions are provided:

[0008] Solenoid valve, including:

[0009] valve sleeve;

[0010] a valve core movably disposed in the valve sleeve;

[0011] A magnetic conductive sleeve and a movable iron, wherein the magnetic conductive sleeve is connected to the valve sleeve, the movable iron is movably arranged in the magnetic conductive sleeve, the movable iron is connected to the valve core, and the movable iron abuts against the valve sleeve to limit its position in a first state.

[0012] As an optional solution, an abutment portion is provided at the end portion where the valve sleeve is connected to the magnetic conductive sleeve, and the movable iron abuts against the abutment portion to limit its position in the first state.

[0013] As an optional solution, a mounting groove for axial movement of the moving iron is provided in the magnetic conductive sleeve, and the abutting portion abuts against the magnetic conductive sleeve and extends radially inwardly along the moving iron.

[0014] As an optional solution, the solenoid valve includes:

[0015] A connecting piece, through which the valve core is fixed to the moving iron.

[0016] As an optional solution, the connecting member extends along the radial direction of the valve core and is fixedly connected to the moving iron.

[0017] As an optional solution, a connecting groove is provided on one of the moving iron and the valve core, and a connecting portion is provided on the other, and the connecting portion is plugged into and matched with the connecting groove to achieve axial limiting fixation.

[0018] As an optional solution, the solenoid valve further includes:

[0019] An elastic member, one end of which is in contact with the moving iron, and the other end of which is in contact with the magnetic sleeve.

[0020] As an optional solution, a guide hole is provided on the moving iron, and at least a portion of the elastic member is located in the guide hole.

[0021] As an optional solution, a through hole is provided on the moving iron, and the through hole penetrates the moving iron along the axial direction of the moving iron.

[0022] As an optional solution, a plurality of pressure equalizing grooves are provided on the outer periphery of the valve core, and the plurality of pressure equalizing grooves are arranged at intervals along the axial direction of the valve core.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The solenoid valve provided by the utility model includes a valve sleeve, a valve core, a magnetic sleeve and a moving iron. The valve core is movably arranged in the valve sleeve, the magnetic sleeve is connected to the valve sleeve, the moving iron is movably arranged in the magnetic sleeve, the moving iron is connected to the valve core, and the moving iron is abutted and limited with the valve sleeve in a first state. Through the abutment and limitation between the moving iron and the valve sleeve, the positioning shoulder structure of the outer diameter of the valve core is eliminated, and the valve core is processed by a centerless grinding method, which improves the processing efficiency of the valve core, reduces the cost, and solves the limiting problem of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 A cross-sectional view of a solenoid valve provided in Example 1 of the present utility model;

[0027] Figure 2 This is a partial cross-sectional view of the solenoid valve provided in Example 2 of the present utility model.

[0028] Reference numerals:

[0029] 100. Solenoid valve;

[0030] 10. Valve sleeve; 11. Opening; 12. Abutment portion;

[0031] 20. Valve core; 21. Connecting portion; 22. Pressure equalizing groove;

[0032] 30. Electromagnetic drive mechanism; 31. Coil; 32. Magnetic sleeve; 321. Mounting slot; 33. Moving iron; 331. Guide hole; 332. Through hole; 333. Connecting slot;

[0033] 40. Connectors;

[0034] 50. Elastic parts;

[0035] 60. Lock nut. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0042] Example 1

[0043] like Figure 1 As shown, this embodiment provides a solenoid valve 100, which includes a valve sleeve 10 and a valve core 20. The valve core 20 is movably arranged in the valve sleeve 10. The valve sleeve 10 is provided with multiple openings 11. The valve core 20 moves in the valve sleeve 10 to open or close the openings 11 to control the flow of fluid in the solenoid valve 100.

[0044] In order to drive the valve core 20 to reciprocate in the valve sleeve 10 , the solenoid valve 100 further includes an electromagnetic driving mechanism 30 , which is used to drive the valve core 20 to move.

[0045] Specifically, if Figure 1 As shown, the electromagnetic drive mechanism 30 includes a magnetic sleeve 32, a coil 31 and a moving iron 33. The valve sleeve 10 is connected to the magnetic sleeve 32 by means of threaded connection or clamping. The coil 31 is sleeved on the outer periphery of the magnetic sleeve 32. The moving iron 33 is movably arranged in the magnetic sleeve 32. The valve core 20 is connected to the moving iron 33. When the coil 31 is energized, the magnetic force generated by the magnetic sleeve 32 pushes the moving iron 33 to move, thereby driving the valve core 20 to move along the axial direction of the valve core 20.

[0046] Optionally, the solenoid valve 100 also includes a locking nut 60, which is threadedly connected to the magnetic sleeve 32. One end of the coil 31 abuts against the magnetic sleeve 32, and the other end abuts against the locking nut 60. The coil 31 is fixed to the magnetic sleeve 32 through the locking nut 60, which facilitates the rapid disassembly and assembly of the coil 31 and the magnetic sleeve 32, thereby improving the installation efficiency of the coil 31 and the magnetic sleeve 32.

[0047] In the prior art, to allow the valve core to move within the axial space of the valve sleeve, a limiting groove and a positioning shoulder are usually provided on the valve sleeve. Under the action of the electromagnetic drive mechanism, the valve core moves along the axial direction of the valve sleeve until the positioning shoulder on the valve core abuts against the limiting groove on the valve sleeve and is restrained, thereby limiting the maximum axial movement distance of the valve core within the valve sleeve to prevent the end of the valve core from extending too far from the valve sleeve. However, this results in a protruding positioning shoulder on the outer diameter of the valve core, which cannot be machined using the existing centerless grinding method. The valve core can only be machined by pressure grinding, resulting in low machining efficiency and unfavorable cost reduction.

[0048] In order to solve the above problems, Figure 1 As shown, the movable iron 33 abuts against the valve sleeve 10 to limit the position in the first state, wherein the first state is when the valve core 20 moves to the maximum stroke state, the movable iron 33 and the valve sleeve 10 abut against the position, and the movable iron 33 and the valve sleeve 10 abut against the position, thereby eliminating the positioning shoulder structure of the outer diameter of the valve core 20, and realizing the processing of the valve core 20 by the centerless grinding method, thereby improving the processing efficiency of the valve core 20, reducing the cost, and solving the limiting problem of the valve core 20.

[0049] Specifically, an abutment portion 12 is provided at the end portion where the valve sleeve 10 is connected to the magnetic sleeve 32 . The movable iron 33 abuts against the abutment portion 12 for position limiting in the first state, thereby achieving axial position limiting of the valve core 20 .

[0050] Optionally, a mounting groove 321 is defined within the magnetic sleeve 32 for axial movement of the movable iron 33. The abutment portion 12 abuts the magnetic sleeve 32 and extends radially inwardly along the movable iron 33. Specifically, the abutment portion 12 is a gasket connected to the end of the valve sleeve 10 near the magnetic sleeve 32. The gasket can reduce damage caused by the movable iron 33 directly impacting the end face of the valve sleeve 10, thereby extending the service life of the solenoid valve 100.

[0051] Optionally, the solenoid valve 100 includes a connecting member 40 , and the valve core 20 is fixed to the movable iron 33 via the connecting member 40 , so as to facilitate the connection and fixation of the valve core 20 and the movable iron 33 .

[0052] Optionally, a connecting member 40 extends radially along the valve core 20 and is fixedly connected to the movable iron 33 to further enhance the stability of the connection between the valve core 20 and the movable iron 33. Specifically, the connecting member 40 can be a cylindrical pin. The valve core 20 has a first connecting hole extending radially therefrom, and the movable iron 33 has a second connecting hole corresponding to the first connecting hole. The cylindrical pin is sequentially inserted into the first and second connecting holes.

[0053] In order to ensure that the movable iron 33 can automatically reset when the coil 31 loses power, the relief valve further includes an elastic member 50 , one end of the elastic member 50 abuts against the movable iron 33 , and the other end abuts against the magnetic sleeve 32 .

[0054] It will be appreciated that when the coil 31 is energized and the movable iron 33 moves toward the valve sleeve 10, after the coil 31 is de-energized, the movable iron 33 moves away from the valve sleeve 10 under the elastic force of the elastic member 50, thereby resetting the movable iron 33. In this case, the elastic member 50 can be a tension spring. When the coil 31 is energized and the movable iron 33 moves away from the valve sleeve 10, after the coil 31 is de-energized, the movable iron 33 moves toward the valve sleeve 10 under the elastic force of the elastic member 50, thereby resetting the movable iron 33. In this case, the elastic member 50 can be a compression spring.

[0055] In this embodiment, a guide hole 331 is provided on the moving iron 33, and at least a portion of the elastic member 50 is located in the guide hole 331. By setting at least a portion of the elastic member 50 in the guide hole 331, a guide is provided for the elastic member 50, thereby ensuring the stability of the elastic member 50 and further ensuring the accuracy of the elastic force provided by the elastic member 50.

[0056] In other embodiments, the solenoid valve 100 further includes a guide rod, one end of which is connected to one of the moving iron 33 and the magnetic sleeve 32, and the other end of the guide rod is movably inserted into the other one of the moving iron 33 and the magnetic sleeve 32. The elastic member 50 is sleeved on the outer periphery of the guide rod, and the guide rod is used to provide guidance for the elastic member 50 to ensure the stability of the elastic member 50, thereby ensuring the accuracy of the elastic force provided by the elastic member 50.

[0057] Optionally, a through hole 332 is provided on the moving iron 33, and the through hole 332 penetrates the moving iron 33 along the axial direction of the moving iron 33, such as Figure 1 As shown, the moving iron 33 separates the magnetic sleeve 32 into two cavities. In order to prevent pressure accumulation when the moving iron 33 moves, the two cavities are connected through the through hole 332, thereby achieving the purpose of preventing pressure accumulation when the moving iron 33 moves.

[0058] In this embodiment, the through hole 332 is connected to the guide hole 331, which facilitates and reduces the difficulty of machining the through hole 332 and the guide hole 331. Furthermore, the provision of the through hole 332 and the guide hole 331 in the movable iron 33 reduces its weight, achieving a lightweight design. When the coil 31 is energized and magnetized, the movable iron 33 responds quickly, thereby driving the valve core 20 to move quickly, thereby shortening the response time.

[0059] In other embodiments, the connection between the two ends of the moving iron 33 can be achieved through other methods, for example, by providing a plurality of through grooves on the outer surface of the moving iron 33, wherein the through grooves extend along the axial direction of the moving iron 33 and penetrate the moving iron 33, thereby achieving connection between the cavities at the two ends of the moving iron 33. Preferably, the plurality of through grooves are evenly spaced around the circumference of the moving iron 33.

[0060] Optionally, a pressure equalizing groove 22 is opened on the outer periphery of the valve core 20, and a plurality of pressure equalizing grooves 22 are arranged at intervals along the axial direction of the valve core 20. The pressure equalizing grooves 22 prevent the valve core 20 from getting stuck under high pressure.

[0061] Example 2

[0062] like Figure 2 As shown, this embodiment provides a solenoid valve 100. The specific structure of the solenoid valve 100 provided in this embodiment is basically the same as that of the solenoid valve 100 provided in Example 1. The specific structure of the solenoid valve 100 provided in this embodiment is different from that of Example 1 in that the connection method between the moving iron 33 and the valve core 20 is different.

[0063] Specifically, a connecting groove 333 is provided on the movable iron 33, and a connecting portion 21 is provided on the valve core 20. The connecting portion 21 is plugged into the connecting groove 333 to achieve axial limit fixation, thereby achieving the connection between the movable iron 33 and the valve core 20. In other embodiments, the connecting groove 333 can also be provided on the valve core 20, and the connecting portion 21 can be provided on the movable iron 33.

[0064] In this embodiment, the connecting groove 333 is a T-shaped groove, and the connecting portion 21 is plugged into and matched with the T-shaped groove to achieve a stable connection between the valve core 20 and the movable iron 33 .

[0065] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with those embodiments or examples are included in at least one embodiment or example of the present invention. Throughout this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be incorporated in any suitable manner in any one or more embodiments or examples.

[0066] The above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include other equivalent embodiments without departing from the spirit of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. Solenoid valve, characterized in that, include: Valve sleeve (10); a valve core (20), the valve core (20) being movably disposed in the valve sleeve (10); A magnetic sleeve (32) and a movable iron (33), wherein the magnetic sleeve (32) is connected to the valve sleeve (10), the movable iron (33) is movably arranged in the magnetic sleeve (32), the movable iron (33) is connected to the valve core (20), and the movable iron (33) abuts against the valve sleeve (10) in a first state to limit the position.

2. The solenoid valve according to claim 1, characterized in that An abutment portion (12) is provided at the end portion of the valve sleeve (10) connected to the magnetic conductive sleeve (32), and the movable iron (33) abuts against the abutment portion (12) to limit position in a first state.

3. The solenoid valve according to claim 2, characterized in that A mounting groove (321) for axial movement of the movable iron (33) is provided in the magnetic conductive sleeve (32), and the abutting portion (12) abuts against the magnetic conductive sleeve (32) and extends radially inwardly along the movable iron (33).

4. The solenoid valve according to claim 1, characterized in that The solenoid valve comprises: A connecting member (40), wherein the valve core (20) is fixed to the moving iron (33) via the connecting member (40).

5. The solenoid valve according to claim 4, characterized in that The connecting member (40) extends along the radial direction of the valve core (20) and is fixedly connected to the moving iron (33).

6. The solenoid valve according to claim 4, characterized in that A connecting groove (333) is provided on one of the movable iron (33) and the valve core (20), and a connecting portion (21) is provided on the other. The connecting portion (21) is plugged into and matched with the connecting groove (333) to achieve axial limiting fixation.

7. The solenoid valve according to any one of claims 1 to 6, characterized in that: The solenoid valve further comprises: An elastic member (50), one end of the elastic member (50) abuts against the moving iron (33), and the other end abuts against the magnetic conductive sleeve (32).

8. The solenoid valve according to claim 7, characterized in that A guide hole (331) is provided on the movable iron (33), and at least a portion of the elastic member (50) is located in the guide hole (331).

9. The solenoid valve according to claim 6, characterized in that A through hole (332) is provided on the moving iron (33), and the through hole (332) penetrates the moving iron (33) along the axial direction of the moving iron (33).

10. The solenoid valve according to any one of claims 1 to 6, characterized in that: A plurality of pressure-equalizing grooves (22) are provided on the outer periphery of the valve core (20), and the plurality of pressure-equalizing grooves (22) are arranged at intervals along the axial direction of the valve core (20).

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