Electromagnetic valve with dynamic sealing structure

Abstract

The utility model relates to an electromagnetic valve with a dynamic sealing structure, which comprises a valve body, a valve core and an electromagnetic driving unit, a valve cavity is arranged in the valve body, one end of the valve body is provided with an inlet, the side of one end of the valve body is provided with an outlet communicated with the inlet, the valve core is arranged in the valve cavity of the valve body, and the electromagnetic driving unit is arranged in the valve cavity of the valve body. A movable sealing structure is arranged between the inner wall of the valve cavity and the valve element, a shell is arranged at the other end of the valve body, the electromagnetic driving unit is arranged in the shell, and the valve element is connected with a connecting rod which penetrates through the other end of the valve body and extends into the shell. The electromagnetic driving unit is used for driving the connecting rod to drive the valve element to move to block the inlet or open the inlet. The utility model has the advantages that the structural design is simple and reasonable, the space design in the valve body is more compact, the cost is reduced, the contact area is effectively reduced through the dynamic seal design, the friction force is small, and the service life of the valve body can be prolonged.

Description

Technical Field

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

[0002] Solenoid valves, as fast-responding and easy-to-operate on-off valves, are widely used in various industries and are particularly important in the aerospace field. The solenoid valves currently used in satellite systems have high performance requirements and operate in harsh environments, posing significant challenges to valve designers.

[0003] Satellite solenoid valves are primarily characterized by fast response, long life (≤ 1 million cycles), compact structure, low mass, and low electromagnetic force requirements. Currently, one of the main factors limiting the development of satellite solenoid valves is their dynamic sealing structure. To ensure a lifespan of ≤ 1 million cycles, the kinematic pair between the valve core and the housing is typically designed as a reed structure. This design utilizes the deformation of the reed to open and close the valve, minimizing wear on the valve core and housing. However, this approach has numerous drawbacks. The reed structure is complex, the production process is difficult, and the raw materials are expensive. Furthermore, due to structural and mass constraints, the electromagnetic force cannot be increased, which in turn limits the valve's flow capacity.

[0004] In existing technologies, another commonly used dynamic sealing solution for solenoid valves is the O-ring. The O-ring has a simple structure and low cost, but has high friction and severe wear, so its lifespan is relatively short and it is difficult to meet the lifespan requirement of ≮1 million times.

[0005] In order to solve the above problems, the utility model proposes a solenoid valve with a dynamic sealing structure. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a solenoid valve with a dynamic sealing structure, which effectively overcomes the defects of the prior art.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A solenoid valve with a dynamic sealing structure includes a valve body, a valve core and an electromagnetic drive unit, a valve cavity is provided inside the valve body, an inlet is provided at one end of the valve body, an outlet communicating with the inlet is provided on the side of one end of the valve body, the valve core is installed in the valve cavity of the valve body, a dynamic sealing structure is provided between the inner wall of the valve cavity and the valve core, the other end of the valve body is provided with a shell, the electromagnetic drive unit is arranged in the shell, the valve core is connected to a connecting rod that passes through the other end of the valve body and extends into the shell, and the electromagnetic drive unit is used to drive the connecting rod to drive the valve core to move to block the inlet or open it.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the valve body is a columnar component with a cylindrical valve cavity provided inside. The valve core is a cylindrical core body adapted to the valve cavity. The valve core has passages running through both ends thereof.

[0011] Furthermore, the dynamic sealing structure includes a circular rubber seal, the outer edge of which is injection-molded and fixed to the side wall of the valve cavity. A first lip ring and a second lip ring are integrally formed on both sides of the inner ring of the rubber seal. Two coaxially distributed first ring grooves are provided in the middle section of the valve core. The first lip ring and the second lip ring are respectively embedded in the two first ring grooves in a one-to-one correspondence, and are close to or in contact with the bottom surfaces of the first ring grooves respectively.

[0012] Furthermore, the dynamic sealing structure includes a circular rubber seal, which is sleeved on the outside of the valve core, and its inner edge is injection-molded and fixed to the surface of the valve core. A third lip ring and a fourth lip ring are respectively integrally formed on both sides of the outer ring of the rubber seal. Two coaxially distributed second ring grooves are provided in the middle section of the inner wall of the valve cavity of the valve body. The third lip ring and the fourth lip ring are respectively embedded in the two second ring grooves and are close to or in contact with the bottom surfaces of the second ring grooves.

[0013] Furthermore, the above-mentioned inlet is a circular opening, and the inner side of the above-mentioned inlet is provided with an annular valve opening sealing portion along the axial inner extension of the above-mentioned valve core for sealing contact with the end of the above-mentioned valve core. The outer diameter of the above-mentioned valve core is equal to the inner diameter of the above-mentioned inlet, and one end of the above-mentioned valve core is provided with a valve core sealing portion with a diameter larger than its outer diameter.

[0014] Furthermore, the center lines of the inlet and outlet are perpendicular to each other.

[0015] Furthermore, the electromagnetic drive unit includes a static iron core, an armature and a coil. The static iron core is fixed to the other end of the valve body. The armature is spaced apart at the end of the static iron core away from the valve body. The connecting rod passes through the through hole in the middle of the static iron core and is connected and fixed to the armature. An elastic part is connected between the static iron core and the armature. The coil is arranged around the static iron core and the armature. The outer shell is a magnetic shell.

[0016] Furthermore, the above-mentioned static iron core and armature are both cylindrical components coaxially distributed with the above-mentioned connecting rod.

[0017] Furthermore, the elastic member is a spring and is sleeved outside the connecting rod.

[0018] Furthermore, grooves are respectively provided around the connecting rod at the ends of the static iron core and the armature that are close to each other, and the two ends of the elastic member are respectively embedded in the two grooves.

[0019] The beneficial effects of the utility model are: simple and reasonable structural design, more compact space design in the valve body, reduced cost, effective reduction in contact area through the design of dynamic seal, low friction, and the ability to extend the life of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a solenoid valve with a dynamic sealing structure according to the present invention;

[0021] Figure 2 This is a partial enlarged view of the solenoid valve with a dynamic sealing structure of the present utility model;

[0022] Figure 3 This is a structural schematic diagram of another embodiment of the solenoid valve with a dynamic sealing structure of the present utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Valve body; 2. Valve core; 3. Dynamic sealing structure; 4. Housing; 5. Connecting rod; 11. Inlet; 12. Outlet; 31. Rubber seal; 41. Connector; 61. Static iron core; 62. Armature; 63. Coil; 64. Elastic member; 111. Valve port sealing portion; 311. First lip ring; 312. Second lip ring; 313. Third lip ring; 314. Fourth lip ring. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] Example

[0027] like Figure 1 、 3 As shown, the solenoid valve with a dynamic sealing structure of this embodiment includes a valve body 1, a valve core 2 and an electromagnetic drive unit, a valve cavity is provided inside the valve body 1, an inlet 11 is provided at one end of the valve body 1, and an outlet 12 communicating with the inlet 11 is provided on the side of one end of the valve body 1, the valve core 2 is installed in the valve cavity of the valve body 1, a dynamic sealing structure 3 is provided between the inner wall of the valve cavity and the valve core 2, the other end of the valve body 1 is provided with a shell 4, the electromagnetic drive unit is arranged in the shell 4, the valve core 2 is connected to a connecting rod 5 that passes through the other end of the valve body 1 and extends into the shell 4, and the electromagnetic drive unit is used to drive the connecting rod 5 to drive the valve core 2 to move to block the inlet 11, or open it.

[0028] The solenoid valve with a dynamic seal structure in this embodiment is a normally open solenoid valve. The electromagnetic drive unit is connected to a power source. When the power is off, the inlet 11 and outlet 12 are connected. When the power is on, the electromagnetic force drives the connecting rod 5 and the valve core 2 toward one end of the valve body 1 until the valve core 2 contacts the inner side of the inlet 11 and the valve is closed. During this entire process, the dynamic seal structure 3 blocks the medium at the inlet 11 and outlet 12, achieving a good seal. Overall, the structural design is simple and reasonable, the space inside the valve body is more compact, and the cost is reduced. The dynamic seal design effectively reduces the contact area, reduces friction, and can extend the life of the valve body.

[0029] As a preferred embodiment, the valve body 1 is a columnar component with a cylindrical valve cavity provided therein, and the valve core 2 is a cylindrical core body adapted to the valve cavity. The valve core 2 has a channel c running through both ends thereof.

[0030] In the above embodiment, a channel a is provided on the valve core 2, through which the media between the upper and lower end faces of the valve core can be connected, ensuring that after the valve is closed, both end faces of the valve core 2 are subjected to the force of the medium, the force is relatively balanced, and the valve closing effect is better.

[0031] In this embodiment, the dynamic sealing structure 3 includes the following two structural forms:

[0032] like Figure 2 As shown, the dynamic sealing structure 3 includes a circular rubber seal 31, the outer edge of which is injection-molded and fixed to the side wall of the valve cavity. A first lip ring 311 and a second lip ring 312 are integrally formed on both sides of the inner ring of the rubber seal 31. Two coaxially distributed first annular grooves are provided in the middle section of the valve core 2 (denoted by d in the figure, a middle sealing surface e is formed between the two first annular grooves, wherein the middle sealing surface e and the two first annular grooves are distributed in a stepped manner). The first lip ring 311 and the second lip ring 312 are respectively embedded in the two first annular grooves in a one-to-one correspondence, and are close to or in contact with the bottom surfaces of the first annular grooves respectively.

[0033] In the above embodiment, a bidirectional dynamic seal is achieved by the cooperation of the first lip ring 311 and the second lip ring 312 with the valve core 2. The dynamic seal structure 3 is a rubber product, integrally injection-molded onto the inner wall of the valve cavity of the valve body 1 using a rubber vulcanization process. When a load is applied to the dynamic seal structure 3, the first and second lip rings 311, 312 adhere more tightly to the valve core 2 under the action of pressure, forming a self-tightening seal. When the load is removed, the first and second lip rings 311, 312 return to their original positions. More specifically, in the de-energized state and during energized movement, the first and second lip rings 311, 312 respectively contact the bottom surface of the first ring groove of the valve core 2, where the diameter is reduced. At this point, friction is low, and no sealing function is required. After full movement, the first and second lip rings 311, 312 contact the outer surface of the valve core 2 (i.e., the surface outside the first ring groove). Friction increases, facilitating a reliable dynamic seal.

[0034] like Figure 3 As shown, the dynamic sealing structure 3 includes a circular rubber seal 31, which is sleeved on the outside of the valve core 2 and has its inner edge fixed to the surface of the valve core 2 by injection molding. A third lip ring 313 and a fourth lip ring 314 are respectively integrally formed on both sides of the outer ring of the rubber seal 31 and protruded therefrom. Two coaxially distributed second annular grooves are provided at intervals in the middle section of the inner wall of the valve cavity of the valve body 1. The third lip ring 313 and the fourth lip ring 314 are respectively embedded in the two second annular grooves in a one-to-one correspondence and are close to or in contact with the bottom surfaces of the second annular grooves.

[0035] The principle of the dynamic seal in solution 2) is the same as that in solution 1) and will not be described in detail here.

[0036] In this embodiment, two dynamic seals may be provided along the movement direction of the valve core 2 , so as to achieve more reliable sealing and guidance of the valve core 2 .

[0037] In this embodiment, the inlet 11 is a circular port, and an annular valve port sealing portion 111 is provided on the inner side of the inlet 11 along the axial direction of the valve core 2 for sealing contact with the end of the valve core 2. The outer diameter of the valve core 2 (e.g. Figure 2 φA) and the inner diameter of the above-mentioned inlet 11 (such as Figure 2In the figure, φB) is equal to each other, and one end of the valve core 2 is provided with a valve core sealing portion f having a diameter greater than its outer diameter. The valve port sealing portion 111 constitutes a valve seat in the traditional sense, achieving a good fit between the end face of the valve core 2 and the valve seat. When the valve core 2 moves toward one end of the valve body 1, the valve core sealing portion and the valve port sealing portion 111 are offset. The significance of the inner diameter of the inlet 11 being equal to the outer diameter of the valve core 2 is that after the valve is closed, the area of ​​the fluid in the inlet 11 acting on one end of the valve core 2 is equal to the area of ​​the fluid entering the valve core 2 through the channel and acting on the other end of the valve core 2, further making the forces at both ends of the valve core 2 consistent. This ensures that the resultant axial force of the medium acting on both ends of the valve core 2 is zero after closing, thereby achieving a good sealing effect.

[0038] In this embodiment, the center lines of the inlet 11 and the outlet 12 are perpendicular to each other.

[0039] As a preferred embodiment, the electromagnetic drive unit includes a static iron core 61, an armature 62 and a coil 63. The static iron core 61 is fixed to the other end of the valve body 1, and the armature 62 is spaced apart at the end of the static iron core 61 away from the valve body 1. The connecting rod 5 passes through the through hole in the middle of the static iron core 61 and is connected and fixed to the armature 62. An elastic part 64 is connected between the static iron core 61 and the armature 62. The coil 63 is arranged around the static iron core 61 and the armature 62, and the shell 4 is a magnetic shell.

[0040] In the above embodiment, after power is turned on, the armature 62 drives the connecting rod 5 and the valve core 2 to move toward one end of the valve body 1 under the action of electromagnetic force until the valve core 2 fits into the inner side of the inlet 11, the valve is closed, and the flow channel is disconnected.

[0041] In this embodiment, the housing 4 is provided with a connector 41 electrically connected to the coil 63. The connector 41 is designed to facilitate connection with an external circuit.

[0042] In this embodiment, the static iron core 61 and the armature 62 are both cylindrical components coaxially distributed with the connecting rod 5 .

[0043] In this embodiment, the elastic member 64 is a spring and is sleeved on the outside of the connecting rod 5. The elastic force of the elastic member 64 acts on the static iron core 61 and the armature 62 in a relatively stable and balanced manner.

[0044] In this embodiment, the ends of the static iron core 61 and the armature 62 close to each other are respectively provided with grooves around the connecting rod 5, and the two ends of the elastic member 64 are respectively embedded in the two grooves. The groove design facilitates the good assembly of the spring.

[0045] In the description of the present invention, it should be understood that 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation to the present invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "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 "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.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A solenoid valve with a dynamic sealing structure, characterized in that: The invention comprises a valve body (1), a valve core (2) and an electromagnetic drive unit, wherein a valve cavity is provided inside the valve body (1), an inlet (11) is provided at one end of the valve body (1), an outlet (12) communicating with the inlet (11) is provided on the side of one end of the valve body (1), the valve core (2) is installed in the valve cavity of the valve body (1), a dynamic sealing structure (3) is provided between the inner wall of the valve cavity and the valve core (2), the other end of the valve body (1) is provided with a shell (4), the electromagnetic drive unit is arranged in the shell (4), the valve core (2) is connected to a connecting rod (5) passing through the other end of the valve body (1) and extending into the shell (4), and the electromagnetic drive unit is used to drive the connecting rod (5) to drive the valve core (2) to move and block the inlet (11), or to open it.

2. The solenoid valve with a dynamic sealing structure according to claim 1, characterized in that: The valve body (1) is a columnar component, and a cylindrical valve cavity is provided inside the valve body. The valve core (2) is a cylindrical core body adapted to the valve cavity, and the valve core (2) has passages running through both ends thereof.

3. The solenoid valve with a dynamic sealing structure according to claim 2, characterized in that: The dynamic sealing structure (3) comprises a circular rubber seal (31), the outer edge of which is injection-molded and fixed on the side wall of the valve cavity, and a first lip ring (311) and a second lip ring (312) are respectively integrally formed and protruded on both sides of the inner ring of the rubber seal (31), and two coaxially distributed first ring grooves are provided at intervals in the middle section of the valve core (2), and the first lip ring (311) and the second lip ring (312) are respectively embedded in the two first ring grooves in a one-to-one correspondence and are close to or in contact with the bottom surface of the first ring groove.

4. The solenoid valve with a dynamic sealing structure according to claim 2, characterized in that: The dynamic sealing structure (3) includes a circular rubber seal (31), which is sleeved on the outside of the valve core (2), and its inner edge is injection-molded and fixed to the surface of the valve core (2). The outer ring of the rubber seal (31) is respectively provided with a third lip ring (313) and a fourth lip ring (314) integrally formed on both sides of the outer ring. Two coaxially distributed second ring grooves are provided at intervals in the middle section of the inner wall of the valve cavity of the valve body (1). The third lip ring (313) and the fourth lip ring (314) are respectively embedded in the two second ring grooves in a one-to-one correspondence and are close to or in contact with the bottom surface of the second ring groove.

5. The solenoid valve with a dynamic sealing structure according to claim 2, characterized in that: The inlet (11) is a circular opening, and an annular valve opening sealing portion (111) is provided on the inner side of the inlet (11) along the axial inward extension of the valve core (2) for sealing contact with the end of the valve core (2). The outer diameter of the valve core (2) is equal to the inner diameter of the inlet (11), and one end of the valve core (2) is provided with a valve core sealing portion with a diameter larger than its outer diameter.

6. The solenoid valve with a dynamic sealing structure according to claim 1, characterized in that: The center lines of the inlet (11) and the outlet (12) are perpendicular to each other.

7. The solenoid valve with a dynamic sealing structure according to any one of claims 1 to 5, characterized in that: The electromagnetic drive unit includes a static iron core (61), an armature (62) and a coil (63), wherein the static iron core (61) is fixed to the other end of the valve body (1), and the armature (62) is spaced apart at the end of the static iron core (61) away from the valve body (1), and the connecting rod (5) passes through the through hole in the middle of the static iron core (61) and is connected and fixed to the armature (62), an elastic member (64) is connected between the static iron core (61) and the armature (62), and the coil (63) is arranged around the static iron core (61) and the armature (62), and the shell (4) is a magnetic shell.

8. The solenoid valve with a dynamic sealing structure according to claim 7, characterized in that: The static iron core (61) and the armature (62) are both cylindrical components coaxially distributed with the connecting rod (5).

9. The solenoid valve with a dynamic sealing structure according to claim 7, characterized in that: The elastic member (64) is a spring and is sleeved outside the connecting rod (5).

10. The solenoid valve with a dynamic sealing structure according to claim 9, characterized in that: The ends of the static iron core (61) and the armature (62) that are close to each other are respectively provided with grooves around the connecting rod (5), and the two ends of the elastic member (64) are respectively embedded in the two grooves.

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