Slide valve structure of direct-acting electromagnetic valve

Abstract

The utility model relates to a slide valve structure of a direct-acting electromagnetic valve. The slide valve structure comprises a valve body, an explosion-proof shell, an excitation shell and a coil component, the sliding valve is arranged in the valve body in a reciprocating motion mode in the axial direction of the sliding valve and comprises a movable iron core and a valve element piece, the movable iron core penetrates into the coil component, a mounting hole is formed in the end, close to the valve body in the axial direction, of the movable iron core, a cone top column is arranged in the mounting hole, a thin-wall hole is formed in the end, away from the valve body in the axial direction, of the valve element piece, and the cone top column is used for being matched with the thin-wall hole. The valve core piece is in interference fit with the mounting hole; and the static iron core is mounted on the valve body and extends into the coil component. When the valve element piece and the movable iron core are assembled, the thin-wall hole is expanded in the radial direction of the movable iron core through the conical top column, and the valve element piece is in interference fit with the inner wall of the mounting hole. And the valve core piece and the movable iron core adopt a split type structural design, so that the processing difficulty and the manufacturing cost of the slide valve are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a direct-acting solenoid valve slide valve structure. Background Technology

[0002] Solenoid valves, as one of the actuators in fluid control automation systems, are widely used in automated control equipment in industries such as manufacturing, energy, railway transportation, petroleum, chemical, nuclear power, military, marine, and aerospace. Currently, in existing solenoid valve spool structures, the valve core and moving iron core are usually integrated. However, this integrated structure presents problems such as high processing difficulty and poor economic efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a direct-acting solenoid valve slide valve structure to solve the problems of high processing difficulty and poor economy in the existing solenoid valve structure where the valve core and moving iron core are integrated.

[0004] To achieve the above and other related objectives, this utility model provides a direct-acting solenoid valve slide valve structure, comprising:

[0005] Valve body;

[0006] An explosion-proof housing is fitted onto the valve body and locked or unlocked by a locking structure.

[0007] An excitation housing is disposed inside the explosion-proof housing, and a coil component is provided inside the excitation housing;

[0008] A slide valve is reciprocatingly disposed within the valve body along its own axial direction. The slide valve includes a moving iron core and a valve core component. The moving iron core passes through the coil component. The moving iron core has a mounting hole at one end along the axial direction near the valve body. A conical apex is provided in the mounting hole. The valve core component has a thin-walled hole at one end along the axial direction away from the valve body. The conical apex is used to cooperate with the thin-walled hole so that the valve core component and the mounting hole are interference-fitted.

[0009] A stationary iron core is installed on the valve body and extends into the coil component. The stationary iron core is coaxially arranged with the moving iron core and is located above the moving iron core.

[0010] Optionally, the mounting hole is provided with a clearance groove.

[0011] Optionally, the valve core is provided with a limiting part, which is used to limit the installation of the valve core along the axial direction of the moving iron core.

[0012] Optionally, the stationary iron core is provided with a sleeve, which is threadedly connected to the valve body.

[0013] Optionally, the moving iron core is slidably disposed inside the sleeve, the moving iron core is provided with a connecting part, and an elastic reset member is provided between the connecting part and the sleeve.

[0014] Optionally, the valve body is provided with a receiving cavity, and a valve seat and a contact platform are provided in the receiving cavity. Both the valve seat and the contact platform are provided with a medium channel. The valve body is also provided with a medium inlet, a medium outlet and a working port. The medium inlet, the medium outlet and the working port are all connected to the receiving cavity through the medium channel.

[0015] Optionally, the valve core is clearance-fitted with the contact platform.

[0016] Optionally, the valve core is provided with a valve plug at one end axially away from the moving iron core. The valve plug is located between the valve seat and the contact platform. The valve plug is provided with a first sealing groove and a second sealing groove. The first sealing groove is used to install a first sealing component, and the second sealing groove is used to install a second sealing component. The first sealing component is used to contact and seal with the valve seat to block the communication between the medium inlet and the working port. The second sealing component is used to contact and seal with the contact platform to block the communication between the medium outlet and the working port.

[0017] Optionally, the valve seat is provided with a first conical portion, which is used to contact and seal with the first sealing component; the contact platform is provided with a second conical portion, which is used to contact and seal with the second sealing component.

[0018] Optionally, the valve seat and the contact platform are each provided with four media channels, which are opened radially along the valve core.

[0019] As described above, this utility model has the following beneficial effects: By cooperating with the thin-walled hole on the valve core and the conical apex in the mounting hole of the moving iron core, when the valve core and the moving iron core are assembled, the conical apex expands the thin-walled hole radially along the moving iron core, increasing the diameter of the hole and allowing an interference fit between the valve core and the inner wall of the mounting hole, thus achieving the connection between the valve core and the moving iron core. The connection method is simple and convenient, and the valve core and the moving iron core adopt a split structure design, effectively reducing the manufacturing difficulty of the slide valve. Furthermore, the split slide valve structure is easy to maintain and replace; when the valve core or the moving iron core malfunctions, it can be replaced individually without replacing the entire solenoid valve, thereby reducing maintenance costs and time. A magnetic field is generated by the coil component, exciting the moving iron core and the stationary iron core. The stationary iron core generates magnetic force, and the moving iron core moves upward and closer to the stationary iron core under the action of the magnetic force, thus completing the switching of the working state of the direct-acting solenoid valve. By setting an explosion-proof shell, the direct-acting solenoid valve shown in this application can meet the application requirements of high-temperature and explosion-proof conditions. Attached Figure Description

[0020] Figure 1 The diagram shown is a cross-sectional view of a direct-acting solenoid valve slide valve as illustrated in an embodiment of this application.

[0021] Figure 2 The diagram shown is a cross-sectional view of a direct-acting solenoid valve as illustrated in an embodiment of this application.

[0022] Figure 3 Displayed as Figure 2 Schematic diagram of the cross-sectional structure of the valve body.

[0023] Explanation of reference numerals in the attached figures

[0024] Valve body 1, receiving cavity 101, valve seat 102, first conical part 102a, limiting mounting part 102b, contact platform 103, second conical part 103a, abutting mating part 103b, medium channel 104, medium inlet 105, medium outlet 106, working port 107, explosion-proof shell 2, locking structure 3, excitation shell 4, coil component 401, slide valve 5, moving iron core 501, mounting hole 501a, cone top column 501b, clearance groove 501c, connecting part 501d, valve core component 502, thin-walled hole 502a, limiting part 502b, valve plug 502c, first sealing groove 502d, second sealing groove 502e, first sealing component 502f, second sealing component 502g, rod part 502h, stationary iron core 6, sleeve 7, elastic reset component 8, elastic retaining ring 9. Detailed Implementation

[0025] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0026] Please see Figures 1 to 3It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components relevant to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, and sizes shown in the accompanying drawings are only for illustrative purposes and to assist those skilled in the art in understanding and reading the content disclosed in the specification. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0027] Before describing the embodiments of this utility model in detail, the application environment of this utility model will be described first. The technology of this utility model is mainly applied in the field of solenoid valve technology. This utility model is used to solve the problems of high processing difficulty and poor economy in the existing solenoid valve structure where the valve core and moving iron core are integrated.

[0028] Please combine Figures 1 to 3 As shown, this utility model provides a direct-acting solenoid valve slide valve structure.

[0029] In an exemplary embodiment of this application, the direct-acting solenoid valve spool valve 5 includes: a valve body 1; an explosion-proof housing 2, sleeved on the valve body 1 and locked or unlocked by a locking structure 3; an excitation housing 4, disposed inside the explosion-proof housing 2, and a coil component 401 disposed inside the excitation housing 4; and a spool valve 5, reciprocating along its own axial direction within the valve body 1, the spool valve 5 including a moving iron core 501 and a valve core component 502, the moving iron core 501 penetrating into the coil component 401, the moving iron core 501 reciprocating along its own axial direction. A mounting hole 501a is provided at one end near the valve body 1, and a conical apex 501b is provided in the mounting hole 501a. A thin-walled hole 502a is provided at one end of the valve core 502 away from the valve body 1 along the axial direction. The conical apex 501b is used to cooperate with the thin-walled hole 502a so that the valve core 502 and the mounting hole 501a are interference fit. A stationary iron core 6 is installed on the valve body 1 and extends into the coil component 401. The stationary iron core 6 is coaxially arranged with the moving iron core 501 and is located above the moving iron core 501.

[0030] In this embodiment, the thin-walled hole 502a on the valve core 502 cooperates with the conical apex 501b inside the mounting hole 501a of the moving iron core 501. When the valve core 502 and the moving iron core 501 are assembled, the conical apex 501b expands the thin-walled hole 502a radially along the moving iron core 501, increasing the diameter of the thin-walled hole 502a and causing an interference fit between the valve core 502 and the inner wall of the mounting hole 501a, thereby achieving the connection between the valve core 502 and the moving iron core 501. The connection method is simple and convenient, and the valve core 502 and the moving iron core 501 adopt a split structure design, effectively reducing the processing difficulty and manufacturing cost of the slide valve 5. The magnetic field generated by the coil component 401 excites the moving iron core 501 and the stationary iron core 6. The stationary iron core 6 can effectively enhance the magnetic field generated by the coil component 401. Under the action of the magnetic field, the moving iron core 501 moves upward and approaches the stationary iron core 6, thereby completing the switching of the working state of the direct-acting solenoid valve. By providing an explosion-proof housing 2, the direct-acting solenoid valve shown in this application can meet the requirements of applications under high-temperature and explosion-proof conditions.

[0031] In an exemplary embodiment of this application, a clearance groove 501c is provided in the mounting hole 501a.

[0032] In this embodiment, the clearance groove 501c is used to avoid the thin-wall deformation of the thin-walled hole 502a. The deformed thin wall enters the clearance groove 501c, which can effectively reduce the risk of the valve core 502 falling out of the mounting hole 501a.

[0033] In an exemplary embodiment of this application, the valve core 502 is provided with a limiting part 502b, which is used to limit the installation of the valve core 502 along the axial direction of the moving iron core 501.

[0034] In this embodiment, the limiting part 502b abuts against the end of the moving iron core 501, limiting the installation stroke of the valve core 502 along the axial direction of the mounting hole 501a, avoiding excessive deformation of the thin-walled hole 502a, which would make subsequent disassembly inconvenient; and the abutting cooperation between the limiting part 502b and the moving iron core 501 allows the operator to sense that the valve core 502 and the moving iron core 501 are connected in place.

[0035] In an exemplary embodiment of this application, a sleeve 7 is provided on the stationary iron core 6, and the sleeve 7 is threadedly connected to the valve body 1.

[0036] In this embodiment, the stationary iron core 6 is welded to the sleeve 7, and the sleeve 7 is threaded to the valve body 1, so that the stationary iron core 6 and the valve body 1 can be quickly connected, and the stationary iron core 6 is suspended above the moving iron core 501 through the sleeve 7; by welding the stationary iron core 6 to the sleeve 7, the exhaust chamber formed by the medium outlet 106, the accommodating cavity 101 and the working port 107 is sealed, so as to prevent the medium from leaking from the gap fit position between the valve core 502 and the contact table 103.

[0037] It is worth noting that a sealing ring is provided between the sleeve 7 and the valve body 1 to prevent the medium in the exhaust chamber from leaking from the connection between the sleeve 7 and the valve body 1.

[0038] In an exemplary embodiment of this application, the moving iron core 501 is slidably disposed inside the sleeve 7, and the moving iron core 501 is provided with a connecting portion 501d, and an elastic reset member 8 is provided between the connecting portion 501d and the sleeve 7.

[0039] In this embodiment, the elastic reset member 8 is a spring. When the coil component 401 is de-energized, the valve core component 502, under its own gravity and the elastic force of the reset spring, applies a pre-tightening force to the first sealing component 502f and the valve seat 102 to seal the contact, thereby achieving the isolation of the working chamber formed by the medium inlet 105 and the working port 107.

[0040] In an exemplary embodiment of this application, the valve body 1 is provided with a receiving cavity 101, and a valve seat 102 and a contact platform 103 are provided in the receiving cavity 101. Both the valve seat 102 and the contact platform 103 are provided with a medium channel 104. The valve body 1 is also provided with a medium inlet 105, a medium outlet 106 and a working port 107. The medium inlet 105, the medium outlet 106 and the working port 107 are all connected to the receiving cavity 101 through the medium channel 104.

[0041] In this embodiment, the medium outlet 106 and the working port 107 are connected through the medium channel 104 provided on the contact platform 103; the medium inlet 105 and the working port 107 are connected through the medium channel 104 provided on the valve seat 102.

[0042] It is worth noting that a sealing ring is provided between the contact platform 103 and the valve body 1 to prevent the medium in the exhaust chamber from leaking from the connection between the contact platform 103 and the valve body 1; the contact platform 103 is provided with an abutting mating part 103b, which abuts against the valve body 1, and the sleeve 7 abuts against the contact platform 103. The sleeve 7 is threadedly connected to the valve body 1, applying a preload to the abutting mating part 103b of the contact platform 103, so that the contact platform 103 is pressed and fixed on the valve body 1 by the sleeve 7, thereby limiting the axial movement of the contact platform 103 along the slide valve 5; the sleeve 7 is provided with a stepped surface, and the explosion-proof housing 2 is provided with a stepped mating surface. The stepped mating surface of the explosion-proof housing 2 mates with the stepped surface of the sleeve 7. The valve body 1 is provided with an abutting groove, and the explosion-proof housing 2 is provided with a threaded hole. A flat-end set screw is threaded into the threaded hole of the explosion-proof housing 2, and the flat-end set screw abuts against the abutting groove, thereby limiting the axial movement of the explosion-proof housing 2 along the slide valve 5. The axial positioning of the spool 5 restricts the loosening or axial displacement between the sleeve 7 and the valve body 1; a sealing ring is provided between the explosion-proof shell 2 and the valve body 1, forming a double seal with the sealing ring provided between the sleeve 7 and the valve body 1, further preventing leakage of the medium in the exhaust chamber; a limiting installation part 502b is provided on the valve seat 102, which is used to abut against the valve body 1, thereby limiting the installation of the valve seat 102 and the valve body 1 along the axial direction of the spool valve 5; an annular groove is provided on the valve body 1, which is used to install the elastic retaining ring 9, which abuts against the limiting installation part 102b of the valve seat 102, effectively preventing the valve seat 102 from axially loosening or falling off from the valve body 1 under vibration conditions; a first sealing ring and a second sealing ring are provided sequentially between the valve seat 102 and the valve body 1 along the axial direction of the spool valve 5 to prevent the medium in the working chamber from leaking from the connection between the valve body 1 and the valve seat 102.

[0043] In an exemplary embodiment of this application, the valve core 502 is clearance-fitted with the contact platform 103.

[0044] In this embodiment, the valve core 502 is fitted with the contact platform 103 with a clearance, so that the valve core 502 can move along the axial direction of the slide valve 5 within the contact platform 103, thereby realizing the switching of the working state between the working chamber and the exhaust chamber.

[0045] In an exemplary embodiment of this application, a valve plug 502c is provided at one end of the valve core 502 that is axially away from the moving iron core 501. The valve plug 502c is located between the valve seat 102 and the contact platform 103. The valve plug 502c is provided with a first sealing groove 502d and a second sealing groove 502e. The first sealing groove 502d is used to install a first sealing component 502f, and the second sealing groove 502e is used to install a second sealing component 502g. The first sealing component 502f is used to contact and seal with the valve seat 102 to block the communication between the medium inlet 105 and the working port 107. The second sealing component 502g is used to contact and seal with the contact platform 103 to block the communication between the medium outlet 106 and the working port 107.

[0046] In this embodiment, the valve core 502 includes a rod portion 502h and a valve plug 502c. The diameter of the valve plug 502c is larger than that of the rod portion 502h. The valve plug 502c has a first sealing groove 502d and a second sealing groove 502e on both sides of the axial direction of the rod portion 502h. The medium inlet 105 is cut off from the working port 107 by the first sealing member 502f provided in the first sealing groove 502d contacting and sealing with the valve seat 102. The medium outlet 106 is cut off from the working port 107 by the second sealing member 502g provided in the second sealing groove 502e contacting and sealing with the contact platform 103.

[0047] In an exemplary embodiment of this application, the valve seat 102 is provided with a first conical portion 102a, which is used to contact and seal with the first sealing member 502f; the contact platform 103 is provided with a second conical portion 103a, which is used to contact and seal with the second sealing member 502g.

[0048] In this embodiment, by providing a first tapered portion 102a on the valve seat 102 to contact and seal with the first sealing component 502f, and providing a second tapered portion 103a on the contact platform 103 to contact and seal with the second sealing component 502g, the contact area between the valve seat 102 and the first sealing component 502f, and between the contact platform 103 and the second sealing component 502g, can be effectively reduced. This slows down the excessive compression of the first sealing component 502f and the second sealing component 502g, reduces damage to the first sealing component 502f and the second sealing component 502g, and thus extends the service life of the first sealing component 502f and the second sealing component 502g.

[0049] In an exemplary embodiment of this application, the valve seat 1 and the contact platform 103 are each provided with four media channels 104, which are radially distributed along the valve core 502.

[0050] In this embodiment, four medium channels 104 are distributed on the contact platform 103, which realizes gas flow while making the gas discharge structure more compact and small, shortening the gas flow path, and enabling the valve to switch working states more quickly; four medium channels 104 are distributed on the valve seat 102, thereby realizing the inflow of gas.

[0051] The working principle is as follows: A thin-walled hole 502a on the valve core 502 engages with a conical apex 501b inside the mounting hole 501a of the moving iron core 501. When the valve core 502 and the moving iron core 501 are assembled, the conical apex 501b expands the thin-walled hole 502a radially along the moving iron core 501, increasing the diameter of the hole and creating an interference fit between the valve core 502 and the inner wall of the mounting hole 501a, thus connecting the valve core 502 and the moving iron core 501. The connection method is simple and convenient, and the valve core 502 and the moving iron core 501 adopt a split structure design, effectively reducing the processing difficulty and manufacturing cost of the slide valve 5. A magnetic field is generated by the coil component 401, exciting the moving iron core 501 and the stationary iron core 6. The stationary iron core 6 generates magnetic force, causing the moving iron core 501 to move upwards and closer to the stationary iron core 6 under the action of the magnetic force, thereby completing the switching of the working state of the direct-acting solenoid valve. By providing an explosion-proof housing 2, the direct-acting solenoid valve shown in this application can meet the requirements of applications under high-temperature and explosion-proof conditions.

[0052] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A direct-acting solenoid valve slide valve structure, characterized in that, include: Valve body; An explosion-proof housing is fitted onto the valve body and locked or unlocked by a locking structure. An excitation housing is disposed inside the explosion-proof housing, and a coil component is provided inside the excitation housing; A slide valve is reciprocatingly disposed within the valve body along its own axial direction. The slide valve includes a moving iron core and a valve core component. The moving iron core passes through the coil component. The moving iron core has a mounting hole at one end along the axial direction near the valve body. A conical apex is provided in the mounting hole. The valve core component has a thin-walled hole at one end along the axial direction away from the valve body. The conical apex is used to cooperate with the thin-walled hole so that the valve core component and the mounting hole are interference-fitted. A stationary iron core is installed on the valve body and extends into the coil component. The stationary iron core is coaxially arranged with the moving iron core and is located above the moving iron core.

2. The direct-acting solenoid valve slide valve structure according to claim 1, characterized in that: The mounting hole is provided with a clearance groove.

3. The direct-acting solenoid valve slide valve structure according to claim 1, characterized in that: The valve core is provided with a limiting part, which is used to limit the installation of the valve core along the axial direction of the moving iron core.

4. The direct-acting solenoid valve slide valve structure according to claim 1, characterized in that: The stationary iron core is provided with a sleeve, which is threadedly connected to the valve body.

5. The direct-acting solenoid valve slide valve structure according to claim 4, characterized in that: The moving iron core is slidably disposed inside the sleeve, and a connecting part is provided on the moving iron core. An elastic reset member is provided between the connecting part and the sleeve.

6. The direct-acting solenoid valve slide valve structure according to claim 5, characterized in that: The valve body is provided with a receiving cavity, and a valve seat and a contact platform are provided in the receiving cavity. Both the valve seat and the contact platform are provided with a medium channel. The valve body is also provided with a medium inlet, a medium outlet and a working port. The medium inlet, the medium outlet and the working port are all connected to the receiving cavity through the medium channel.

7. The direct-acting solenoid valve slide valve structure according to claim 6, characterized in that: The valve core is fitted with the contact platform with a clearance.

8. The direct-acting solenoid valve slide valve structure according to claim 7, characterized in that: The valve core is provided with a valve plug at one end axially away from the moving iron core. The valve plug is located between the valve seat and the contact platform. The valve plug is provided with a first sealing groove and a second sealing groove. The first sealing groove is used to install a first sealing component, and the second sealing groove is used to install a second sealing component. The first sealing component is used to contact and seal with the valve seat to block the communication between the medium inlet and the working port. The second sealing component is used to contact and seal with the contact platform to block the communication between the medium outlet and the working port.

9. The direct-acting solenoid valve slide valve structure according to claim 8, characterized in that: The valve seat is provided with a first conical part, which is used to contact and seal with the first sealing component; the contact platform is provided with a second conical part, which is used to contact and seal with the second sealing component.

10. The direct-acting solenoid valve slide valve structure according to claim 6, characterized in that: Both the valve seat and the contact platform have four media channels, which are opened radially along the valve core.

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