An actuator for a valve device and a valve device

Abstract

The utility model discloses an actuator for valve device, it includes: coil shell (101), the electromagnetic coil (102) is located in the coil shell, the electromagnetic coil includes the bobbin (1021) and the aluminium wire that winds on the bobbin, the execution component is set up to the axial through bobbin, the execution component includes fixed iron core (103) and movable iron core (104), the axial end of fixed iron core is from coil shell and projects, the circumferential outer wall of fixed iron core has the circumferential groove (1033) of radially concave, to expand the accommodation space between coil shell circumferential inner wall and the corresponding position fixed iron core circumferential outer wall, the coil shell is fixedly arranged in the circumferential groove at least in the axial direction, the fixed iron core has the cavity of axial extension, and the movable iron core is arranged in the cavity axially moves, and the movable iron core is used for with the valve element of valve device is connected.

Description

Technical Field

[0001] This utility model relates to a valve device, and more particularly to an actuator of the valve device. Background Technology

[0002] In fluid control systems, valve devices, such as hydraulic directional valves, are common control components. They use electromagnetic force to drive the movement of the valve core relative to the valve body, achieving functions such as valve opening and closing, and fluid flow direction control. During the process of the valve core moving relative to the valve body to open the port, it is affected by the flow resistance generated by the fluid medium. Especially at the instant the port opens, the flow resistance increases sharply, requiring the valve core to possess an appropriate electromagnetic force to overcome this resistance and complete the movement.

[0003] Currently, the electromagnetic force driving the valve core is generated by electromagnetic coils wound with copper wire. However, with the increasing demand for reducing product costs, the high cost of electromagnetic coils wound with copper wire can no longer meet this requirement. Utility Model Content

[0004] One of the objectives of this invention is to provide an actuator for valve devices that can significantly reduce costs while ensuring sufficient driving force for the valve core.

[0005] To achieve the above objectives, this utility model proposes an actuator for a valve device, comprising:

[0006] Coil housing;

[0007] An electromagnetic coil, which is disposed inside a coil housing, the electromagnetic coil including a winding shaft and aluminum wire wound on the winding shaft;

[0008] An actuating component, axially extending through a winding shaft, includes a fixed iron core and a moving iron core. The axial end of the fixed iron core extends from the coil housing. The outer circumferential wall of the fixed iron core has a radially concave circumferential groove to expand the accommodating space between the inner circumferential wall of the coil housing and the corresponding outer circumferential wall of the fixed iron core. The coil housing is fixedly disposed within the circumferential groove, at least in the axial direction. The fixed iron core has an axially extending cavity, and the moving iron core is axially movable within the cavity. The moving iron core is used to connect with the valve core of a valve device.

[0009] Furthermore, the actuator of this utility model also includes a fastener connected to the axial end of the fixed iron core, wherein the axial end face of the fastener near the coil housing is configured as the sidewall of the circumferential groove.

[0010] Furthermore, in the actuator described in this utility model, the fastener has an internal thread that connects to the axial end of the fixed iron core.

[0011] Furthermore, in the actuator described in this utility model, the coil housing is configured such that its outer contour does not protrude beyond the outer contour of the valve body of the valve device in at least one direction.

[0012] Furthermore, in the actuator described in this utility model, the coil housing is configured such that its outer contour does not protrude beyond the lower surface of the valve body of the valve device, which serves as the mounting surface.

[0013] Furthermore, in the actuator described in this utility model, the outer diameter of the coil housing is 60-75 mm.

[0014] Furthermore, in the actuator described in this utility model, the outer diameter of the coil housing is 42-50 mm.

[0015] Furthermore, in the actuator described in this utility model, the ratio of the outer diameter of the coil housing to the outer diameter of the fixed iron core at the circumferential groove is 2.3 to 3.

[0016] Furthermore, in the actuator described in this utility model, the outer diameter of the fixed iron core at the circumferential groove is 24-29 mm.

[0017] Furthermore, in the actuator described in this utility model, the outer diameter of the fixed iron core at the circumferential groove is 16-20 mm.

[0018] Furthermore, in the actuator described in this utility model, the surface of the aluminum wire has an anti-oxidation film.

[0019] Another objective of this invention is to provide a valve device with a valve core that responds quickly and accurately, has a robust structure, effectively ensures the flow control function of the valve device, and is inexpensive.

[0020] Based on the above-mentioned utility model objectives, this utility model also provides a valve device, which includes a valve body and a valve core that can move relative to the valve body, and further includes an actuator as described above, wherein the coil housing is fixedly abutted against the side wall of the valve body, the fixed iron core is connected to the valve body, and the moving iron core is connected to the valve core.

[0021] The actuator for valve devices described in this utility model can effectively reduce product costs while ensuring sufficient driving force for the valve core of the valve device.

[0022] Another objective of this utility model is to provide a valve device whose valve core action response is rapid and accurate, and whose structure is stable, effectively ensuring the flow control function of the valve device, and at a low cost. Attached Figure Description

[0023] Figure 1The structure of the actuator described in this utility model is schematically shown in one embodiment from a frontal view.

[0024] Figure 2 A side view shows a schematic diagram of the actuator according to one embodiment of the present invention.

[0025] Figure 3 A schematic diagram of the valve device described in this utility model is shown from a frontal view in one embodiment. Detailed Implementation

[0026] The actuator and valve device of this utility model will be further explained and described below with reference to the accompanying drawings and specific embodiments. However, such explanation and description do not constitute an undue limitation on the technical solution of this utility model.

[0027] Valve devices, such as hydraulic directional valves, are common control components. They use electromagnetic force to drive the movement of the valve core relative to the valve body, thereby achieving functions such as valve opening and closing, and fluid flow direction control. During the process of the valve core moving relative to the valve body to open the port, it is affected by the flow resistance generated by the fluid medium. Especially at the moment the port opens, the flow resistance increases sharply, which requires the valve core to possess an appropriate electromagnetic force to overcome the resistance and complete the movement.

[0028] Currently, the electromagnetic force driving the valve core is generated by electromagnetic coils wound with copper wire. However, copper wire is expensive, especially for hydraulic directional valves with two electromagnetic coils, where the actuator cost often exceeds 70% of the valve assembly material cost. Using electromagnetic coils wound with copper wire further increases the product's cost burden.

[0029] To address the aforementioned issues, this invention provides an actuator for a valve device in one embodiment, which effectively reduces product costs without compromising the performance of the valve device, i.e., while ensuring electromagnetic driving force, valve core response time, and stability.

[0030] like Figure 1 As shown, in some embodiments, the actuator 100 for the valve device may include:

[0031] The coil housing 101 contains an electromagnetic coil 102, which includes a winding shaft 1021 and aluminum wire 1022 wound on the winding shaft. It should be noted that... Figure 1 The aluminum wire at "1022" is represented by a continuous cross-sectional line within a region because this area is also filled with insulating material, such as epoxy resin. Therefore, it is not shown as several circular cross-sections of aluminum wire on the drawing.

[0032] An actuating component, axially extending through the winding shaft, includes a fixed iron core 103 and a moving iron core 104. The axial ends 1031 and 1032 of the fixed iron core 103 extend from the coil housing 101, with the axial end 1031 near the valve body 200 of the valve device used for connection to the valve body 200. The fixed iron core has an axially extending cavity, and the moving iron core 104 is movably disposed within the cavity along the axial direction L, used for connection to the valve core 300 of the valve device. In some more specific embodiments, the moving iron core 104 can be connected to the valve core 300 via a push rod 1041.

[0033] Therefore, this invention uses aluminum wire instead of copper wire, and the cost of aluminum wire is much lower than that of copper wire, thus significantly reducing the cost of the product. However, on the other hand, aluminum wire has a higher resistivity than copper wire. Therefore, if aluminum wire with the same diameter as copper wire is used, under the same power supply voltage, the coil wound with aluminum wire may not be able to generate the same electromagnetic force to drive the valve core 300 to move as the coil wound with copper wire. Therefore, the performance of the valve device may be affected.

[0034] Based on this, the circumferential outer wall of the actuator 103 of this utility model has a radially concave circumferential groove 1033 to expand the accommodating space between the circumferential inner wall 1011 of the coil housing 101 and the corresponding circumferential outer wall 1035 of the fixed core. That is, from Figure 1 As can be seen, the outer circumferential surface of the fixed iron core has a circumferential groove 1033 that is concave relative to the protruding shoulder 1034. As a result, the outer diameter of the fixed iron core at the circumferential groove 1033 is reduced, thereby increasing the accommodating space between the circumferential inner wall 1011 of the coil housing 101 and the corresponding circumferential outer wall 1035 of the fixed iron core. This increases the winding space, allowing a larger diameter aluminum wire to be wound on the winding shaft to generate sufficient electromagnetic force to drive the valve core 300 to move.

[0035] Furthermore, by providing the circumferential groove 1033, the coil housing 101 can be fixedly disposed within the circumferential groove 1033 at least in the axial direction L, thereby ensuring that the coil housing is stably disposed and preventing even slight movement from occurring as the valve core moves, thus guaranteeing the stability of the actuator's operation.

[0036] In some more specific embodiments, such as Figure 1 As shown, the actuator of this utility model also includes a fastener 105 connected to another axial end 1032 of the fixed iron core. The fastener 105 forms two sidewalls of the circumferential groove 1033 near the axial end face 1051 of the coil housing and the axial end face 1036 of the shoulder 1034.

[0037] In some other, more specific embodiments, a shoulder similar to the shoulder 1034 may also be formed on this side near the other axial end 1032 of the fixed core, thereby forming two sidewalls of the circumferential groove.

[0038] In some more specific embodiments, the fastener 105 may have internal threads, and correspondingly, the other axial end 1032 of the stationary iron core may have external threads, thereby achieving a threaded connection between the two. In this way, when the fastener is tightened toward the valve body 200, the coil housing 101 is securely mounted in the circumferential groove, thereby achieving a stable connection with the valve body. During the process of the moving iron core driving the valve core to move, the axial movement of the coil housing that may occur is effectively avoided, ensuring the stability of the actuator operation.

[0039] In some embodiments, to further increase the winding space, the internal volume of the coil housing can be further increased. In some more specific embodiments, the outer diameter of the coil housing can be 60–75 mm. In other more specific embodiments, the outer diameter of the coil housing can be 42–50 mm.

[0040] In some more specific embodiments, to avoid interference between the enlarged coil housing and other surrounding components, the coil housing 101 is configured such that its outer contour does not protrude beyond the outer contour of the valve body 200 of the valve device in at least one direction. For example, as Figure 1 As shown, in the height direction H, the outer contour of the coil housing 101 does not protrude beyond the upper surface 201 and / or lower surface 202 of the valve body 200. Alternatively, as... Figure 2 As shown, in the perpendicular to Figure 1 In the direction of the paper, the outer contour of the coil housing 101 does not protrude beyond the front surface 203 and / or rear surface 204 of the valve body 200.

[0041] In some more specific embodiments, the lower surface 202 of the valve body of the valve device serves as the mounting surface of the entire valve device, in which case the outer contour of the coil housing does not protrude beyond the lower surface 202.

[0042] In some specific implementations, the ratio of the outer diameter of the coil housing to the outer diameter of the fixed iron core at the circumferential groove can be 2.3 to 3, so as to further rationally set the winding space.

[0043] In some more specific embodiments, the outer diameter (i.e., outer diameter) of the stationary core at the circumferential groove can be 24–29 mm. This dimensional setting can be applied to valve devices with a specification of NG10 (i.e., a nominal diameter of 10 mm for the valve device).

[0044] In some other, more specific embodiments, the outer diameter (i.e., outer diameter) of the stationary core at the circumferential groove can be 16–20 mm. This dimensional setting can be applied to valve devices with a specification of NG6 (i.e., a nominal diameter of 6 mm for the valve device).

[0045] In addition, considering that aluminum wire is more prone to oxidation to form an oxide film compared to copper wire, and that the oxide film increases contact resistance and may have some adverse effects with long-term use, in some embodiments, the surface of the aluminum wire may have an anti-oxidation film, such as a chromate anti-oxidation film or a chromium-free anti-oxidation film.

[0046] In one embodiment, this utility model also provides a valve device.

[0047] In some specific implementation methods, such as Figure 3 As shown, the valve device can be configured as a directional valve, such as a hydraulic directional valve, which may include a valve body 200 and a valve core 300 that can move relative to the valve body. In addition, actuators 100 as described above are respectively installed on the left and right sides of the valve body. The coil housing 101 is fixedly abutted against the side wall of the valve body. The fixed iron core 103 is connected to the valve body 200, for example, by threaded connection to the valve body through the shaft end 1031. A sealing ring 400 is provided between the fixed iron core 103 and the valve body 200. The moving iron core 104 is connected to the valve core 300.

[0048] When the actuator 100 is electrically connected to the connector 106, the solenoid coil 102 generates an electromagnetic force that causes the moving iron core 104 to move axially relative to the fixed iron core 103, thereby driving the valve core to move axially. In the de-energized state, the solenoid coil does not generate an electromagnetic force, and the valve core 300 can move in the opposite direction under the action of the reset element 500 (such as the restoring force from the elastic element), thereby returning to the initial position.

[0049] Of course, in some embodiments, the valve device may also include only one actuator 100.

[0050] The valve device described in this utility model significantly reduces the cost of the valve device by using aluminum wire as the winding of the electromagnetic coil. While reducing costs, it still ensures that the valve core action response is rapid and accurate, and the structure is stable, effectively guaranteeing the flow control function of the valve device.

[0051] It should be noted that the prior art within the scope of protection of this utility model is not limited to the embodiments given in this utility model document. All prior art that does not contradict the solution of this utility model, including but not limited to prior patent documents, prior publications, prior public uses, etc., can be included in the scope of protection of this utility model.

[0052] Furthermore, the combination of the technical features in this case is not limited to the combination methods described in the claims of this case or the combination methods described in the specific embodiments. All technical features described in this case can be freely combined or combined in any way, unless they contradict each other.

[0053] It should also be noted that the embodiments listed above are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments, and any similar changes or modifications made thereto that can be directly derived or easily conceived by those skilled in the art from the content disclosed in this utility model should fall within the protection scope of this utility model.

Claims

1. An actuator for a valve device, characterized in that, include: Coil housing (101); An electromagnetic coil (102) is disposed inside a coil housing, the electromagnetic coil including a winding shaft (1021) and aluminum wire wound on the winding shaft; An actuating component is axially disposed through a winding shaft. The actuating component includes a fixed iron core (103) and a moving iron core (104). The axial end of the fixed iron core extends from the coil housing. The circumferential outer wall of the fixed iron core has a radially concave circumferential groove (1033) to expand the accommodating space between the circumferential inner wall of the coil housing and the corresponding circumferential outer wall of the fixed iron core. The coil housing is fixedly disposed in the circumferential groove at least in the axial direction. The fixed iron core has an axially extending cavity. The moving iron core is axially movable within the cavity. The moving iron core is used to connect with the valve core of the valve device.

2. The actuator as described in claim 1, characterized in that, It also includes a fastener (105) connected to the axial end of the fixed iron core, wherein the axial end face of the fastener near the coil housing is configured as the sidewall of the circumferential groove.

3. The actuator as described in claim 2, characterized in that, The fastener has an internal thread and is connected to the axial end of the fixed iron core.

4. The actuator as described in claim 1, characterized in that, The coil housing is configured such that its outer contour does not protrude beyond the outer contour of the valve body of the valve device in at least one direction.

5. The actuator as described in claim 4, characterized in that, The coil housing is configured such that its outer contour does not protrude beyond the lower surface (202) of the valve body of the valve device, which serves as the mounting surface.

6. The actuator as claimed in claim 1, characterized in that, The outer diameter of the coil housing is 60-75 mm.

7. The actuator as claimed in claim 1, characterized in that, The outer diameter of the coil housing is 42–50 mm.

8. The actuator as claimed in claim 1, characterized in that, The ratio of the outer diameter of the coil housing to the outer diameter of the fixed iron core at the circumferential groove is 2.3 to 3.

9. The actuator as claimed in claim 1, characterized in that, The outer diameter of the fixed iron core at the circumferential groove is 24-29 mm.

10. The actuator as claimed in claim 1, characterized in that, The outer diameter of the fixed iron core at the circumferential groove is 16-20 mm.

11. The actuator as claimed in claim 1, characterized in that, The aluminum wire has an anti-oxidation film on its surface.

12. A valve device comprising a valve body (200) and a valve core (300) movable relative to the valve body, characterized in that, It also includes an actuator (100) as described in any one of claims 1-9, wherein the coil housing is fixedly abutted against the side wall of the valve body, the fixed iron core is connected to the valve body, and the moving iron core is connected to the valve core.

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