Proportional electromagnet

Abstract

The utility model relates to the technical field of proportion electromagnets, and provides a proportion electromagnet which comprises an anti-explosion shell, an electromagnet assembly and an electromagnet driver, the electromagnet assembly is arranged in the anti-explosion shell and comprises a coil, an armature, an ejector rod and an elastic piece, the armature is arranged in the coil and can move axially, and the ejector rod is arranged in the anti-explosion shell. The coil is connected with the anti-explosion shell, the ejector rod penetrates through the armature to be connected with the armature and penetrates out of the two ends of the anti-explosion shell, the elastic piece is connected between the armature and the anti-explosion shell, and the electromagnet driver is connected with the coil and the ejector rod. The anti-explosion proportional electromagnet is compact and reasonable in overall structure, meets the anti-explosion requirements of mining and other scenes, can be automatically and manually controlled respectively, and improves the control convenience and control precision of the proportional electromagnet.

Description

Technical Field

[0001] This utility model relates to the field of proportional electromagnet technology, and specifically to a proportional electromagnet. Background Technology

[0002] Existing proportional electromagnets for coal mines have some exposed components, which cannot meet the explosion-proof performance requirements for mining applications, and the control is also limited. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a proportional electromagnet to at least solve the technical problems of existing proportional electromagnets failing to meet the explosion-proof performance requirements for mining and having a single control method.

[0004] To address the aforementioned technical problems, embodiments of this utility model provide a proportional electromagnet, comprising an explosion-proof housing, an electromagnet assembly, and an electromagnet driver. The electromagnet assembly is disposed within the explosion-proof housing and includes a coil, an armature, a push rod, and an elastic element. The armature is disposed within the coil and is axially movable. The push rod passes through the armature and is connected to it, extending from both ends of the explosion-proof housing. The elastic element connects the armature and the explosion-proof housing. The electromagnet driver is connected to both the coil and the push rod.

[0005] In some embodiments, the explosion-proof housing includes a housing body and an end cap disposed at a first end of the housing body, the electromagnet assembly is disposed within the housing body, and the end cap has a first receiving groove that mates with the armature.

[0006] In some embodiments, the end cap further has a second receiving groove, the elastic member is sleeved on the outer periphery of the top rod and located in the second receiving groove, one end of the elastic member abuts against the second receiving groove, and the other end of the elastic member abuts against the armature.

[0007] In some embodiments, a bushing is provided around the outer periphery of the armature, the outer wall of the bushing is connected to the inner wall of the coil, the end cap is connected to the inner wall of the coil, and there is a gap between the end cap and the bushing.

[0008] In some embodiments, the second end of the housing body is provided with a first sealing cap for sealing the top rod.

[0009] In some embodiments, the first sealing cap is a rubber sealing cap. In some embodiments, the push rod includes a first push rod section and a second push rod section, and the armature has a first cavity that mates with the first push rod section and a second cavity that mates with the second push rod section. The inner diameter of the first cavity is smaller than the inner diameter of the second cavity to form a limiting portion for limiting the push rod.

[0010] In some embodiments, the electromagnet actuator includes an actuator body and a control board. The actuator body is disposed outside the explosion-proof housing, and the control board is disposed inside the explosion-proof housing and connected to the actuator body via an air connector.

[0011] In some embodiments, the explosion-proof housing is a metal housing.

[0012] In some embodiments, the electromagnet assembly is in multiple sets.

[0013] This utility model provides a proportional electromagnet, which consists of an explosion-proof housing, an electromagnet assembly, and an electromagnet driver. The electromagnet assembly is housed within the explosion-proof housing and includes a coil, an armature, a push rod, and an elastic element. The armature is located within the coil and is axially movable. The push rod passes through the armature and is connected to it, extending from both ends of the explosion-proof housing. The elastic element connects the armature and the explosion-proof housing. The electromagnet driver is connected to both the coil and the push rod. The overall structure is compact and reasonable, meeting the explosion-proof requirements of mining and other applications. It also allows for automatic and manual control of the push rod, improving the convenience and accuracy of proportional electromagnet control. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the proportional electromagnet in an embodiment of the present invention.

[0016] Figure label:

[0017] 1-Explosion-proof housing, 11-Housing body, 12-End cap, 121-First receiving groove, 122-Second receiving groove; 2-Electromagnet assembly, 21-Coil, 22-Armature, 221-First cavity, 222-Second cavity, 23-Push rod, 231-First push rod section, 232-Second push rod section, 24-Elastic element, 25-Sleeve, 26-Gap; 3-Electromagnet driver, 31-Driver body; 4-First sealing cover; 5-Second sealing cover; 6-Fastener; 71-First sealing element, 72-Sealing ring. Detailed Implementation

[0018] Various embodiments and features of this utility model are described herein with reference to the accompanying drawings.

[0019] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0020] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0021] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0022] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0023] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0024] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0025] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0026] Figure 1 A schematic diagram of the proportional electromagnet according to an embodiment of the present invention is shown. Figure 1As shown, this utility model embodiment provides a proportional electromagnet, including an explosion-proof housing 1, an electromagnet assembly 2, and an electromagnet driver 3. The electromagnet assembly 2 is disposed inside the explosion-proof housing 1. The electromagnet assembly 2 includes a coil 21, an armature 22, a push rod 23, and an elastic element 24. The armature 22 is disposed inside the coil 21 and is axially movable. The push rod 23 passes through the armature 22 and is connected to the armature 22, and extends out from both ends of the explosion-proof housing 1. The elastic element 24 is connected between the armature 22 and the explosion-proof housing 1. The electromagnet driver 3 is connected to the coil 21 and the push rod 23 respectively.

[0027] Among them, the first end of the push rod 23 extending outside the explosion-proof housing 1 ( Figure 1 The left end of the control coil 21 is used to connect to the valve core of the hydraulic valve and other controlled components. The electromagnet actuator 3 can receive the control signal from the controller and convert the control signal into a time-varying drive current to power the coil 21. After the coil 21 is energized, the magnetic field generated by the coil 21 can attract the armature 22, causing the armature 22 to move towards the first side (left side) of the explosion-proof housing 1, thereby driving the push rod 23 connected to the armature 22 to move and generate thrust, pushing the controlled component to move. The electromagnet actuator 3 can control the magnitude of the thrust output by the push rod 23 according to the applied drive current to achieve proportional control of the controlled component. When the armature 22 moves to the left towards the first side of the explosion-proof housing 1, it can compress the elastic element 24, causing the elastic element 24 to accumulate a certain elastic force. When the control signal is a closed signal and the control coil 21 is de-energized, the armature 22 can move to the right and reset under the action of the elastic element 24 (the elastic force accumulated when the coil 21 is energized is released), driving the push rod 23 to move and reset.

[0028] In the above embodiments, the automatic control of the push rod 23 is achieved by switching the energized coil 21 on and off using the electromagnet actuator 3. In other embodiments, the push rod 23 is connected to the electromagnet actuator 3, and the second end of the push rod 23 extending outside the explosion-proof housing 1 is the force-applying end. The user can manually apply external force to the push rod 23, which acts on the control board of the electromagnet actuator 3, thereby pushing the push rod 23 toward the first side of the explosion-proof housing 1, thus achieving manual control of the push rod 23. Since the push rod 23 is connected to the control board of the electromagnet actuator 3, the control board can proportionally convert the thrust generated by the push rod 23 according to the force manually applied to the push rod 23, thereby achieving proportional control of the push rod 23 and improving the control accuracy of the proportional electromagnet.

[0029] The proportional electromagnet provided in this embodiment comprises an explosion-proof housing 1, an electromagnet assembly 2, and an electromagnet driver 3. The electromagnet assembly 2 is housed within the explosion-proof housing 1 and includes a coil 21, an armature 22, a push rod 23, and an elastic element 24. The armature 22 is disposed within the coil 21 and is axially movable. The push rod 23 passes through the armature 22 and is connected to it, extending from both ends of the explosion-proof housing 1. The elastic element 24 connects the armature 22 and the explosion-proof housing 1. The electromagnet driver 3 is connected to both the coil 21 and the push rod 23. The overall structure is compact and reasonable, meeting the explosion-proof requirements of mining applications (e.g., intrinsically safe explosion-proof requirements for coal mines). It also allows for both automatic and manual control of the push rod 23, improving the convenience and accuracy of the proportional electromagnet's control. This intrinsically safe digital proportional electromagnet provides precise control while meeting explosion-proof performance requirements.

[0030] In some embodiments, the explosion-proof housing 1 includes a housing body 11 and an end cap 12 disposed at a first end of the housing body 11, the electromagnet assembly 2 is disposed inside the housing body 11, and the end cap 12 has a first receiving groove 121 that cooperates with the armature 22.

[0031] The armature 22 can move toward and abut against the first receiving groove 121 under the drive of the coil 21, or move away from the first receiving groove 121 after the coil 21 is de-energized. The first receiving groove 21 can not only attract the armature 22 under the magnetic force of the coil 21, but also guide and limit the movement of the armature 22.

[0032] In some embodiments, the end cap 12 further has a second receiving groove 122, the elastic member 24 is sleeved on the outer periphery of the top rod 23 and located within the second receiving groove 122, one end of the elastic member 24 abuts against the second receiving groove 122, and the other end of the elastic member 24 abuts against the armature 22. By providing the second receiving groove 122 on the end cap 12, the installation of the elastic member 24 can be facilitated, and the axial expansion and contraction of the elastic member 24 can be guaranteed.

[0033] The elastic element 24 is preferably a spring or an elastic sleeve, which can drive the armature 22 to quickly reset by axial extension and contraction of the elastic element 24. In specific implementations, the elastic element 24 can also be set as a torsion spring or the like, using torque to push the armature 22 to reset.

[0034] In some embodiments, a bushing 25 is fitted around the outer periphery of the armature 22, the outer wall of the bushing 25 is connected to the inner wall of the coil 21, the end cap 12 is connected to the inner wall of the coil 21, and there is a gap 26 between the end cap 12 and the bushing 25.

[0035] The end cap 12 is connected to the inner wall of the coil 21 from one end, and the bushing 25 is installed inside the coil 21 from the other end. By setting the bushing 25, the axial movement of the armature 22 can be guaranteed. And through the axial gap 26 (air gap) set between the end cap 12 and the bushing 25, a magnetic circuit is formed with the magnetic lines of force generated by the coil 21 when it is energized, thus guaranteeing the axial movement of the armature 22.

[0036] In some embodiments, the second end of the housing body 11 is provided with a first sealing cover 4 to seal the top rod 23. On the one hand, this can ensure the overall sealing of the explosion-proof housing 1. On the other hand, it allows the user to manually press the top rod 23 through the first sealing cover 4 to operate the proportional electromagnet, thereby improving the user's operating experience.

[0037] The first sealing cover 4 is preferably a rubber sealing cover, which ensures a sealing effect while providing users with a better manual pressing experience, and users can ensure accurate pressing of the top rod 23 based on the pressing feel.

[0038] In some embodiments, a second sealing cover 5 is further provided at the second end of the housing body 11. The second sealing cover 5 is located radially outside the first sealing cover 4 and is connected to the housing body 11 by fasteners 6, thereby improving the overall sealing and explosion-proof performance of the explosion-proof housing 1. The second sealing cover 5 can be a metal sealing cover or a non-metal sealing cover.

[0039] In some embodiments, the push rod 23 includes a first push rod segment 231 and a second push rod segment 232. The armature 22 has a first cavity 221 that mates with the first push rod segment 231 and a second cavity 222 that mates with the second push rod segment 232. The inner diameter of the first cavity 221 is smaller than the inner diameter of the second cavity 222 to form a limiting part 223 that limits the movement of the push rod 23, ensuring that the push rod 23 moves proportionally and limiting the movement of the push rod 23 to prevent the push rod 23 from moving away from the armature 22.

[0040] In addition, the inner diameter of the first cavity 221 is smaller than the inner diameter of the second cavity 222, that is, the diameter of the first push rod section 231 is smaller than the diameter of the second push rod section 232, which can increase the force application area of ​​the second push rod section 232 and make it easier for the user to press.

[0041] In practice, the structure of the push rod 23 matches the structure of the armature 22. As long as the two are reliably connected and the push rod 23 can move smoothly axially along the inner cavity of the armature 22, it is acceptable.

[0042] In some embodiments, the electromagnet driver 3 includes a driver body 31 and a control board. The driver body 31 is disposed outside the explosion-proof housing 1, and the control board is disposed inside the explosion-proof housing 1 and connected to the driver body 31 via an air connector. The control board can be sealed inside the explosion-proof housing 1 and electrically connected to external components via the air connector, thus meeting the intrinsically safe explosion-proof requirements of coal mines.

[0043] In some embodiments, the explosion-proof housing 1 is a metal housing that meets the intrinsically safe explosion-proof requirements for coal mines.

[0044] In some embodiments, the electromagnet assembly 2 consists of multiple sets. For example, in this embodiment, there are two sets of electromagnet assemblies, each connected to the rod-side chamber and rodless chamber of the hydraulic cylinder, respectively. The same electromagnet driver 3 can be used to control the movement of the valve cores in the rod-side chamber and rodless chamber, respectively, thereby controlling the fluid supply to both chambers of the hydraulic cylinder. This facilitates integrated control of the hydraulic cylinder and ensures good functional independence. Furthermore, this integrated structure facilitates on-site installation and simplifies wiring connections, reducing the cost of proportional electromagnets.

[0045] In other embodiments, a hydraulic support typically has several or even a dozen hydraulic cylinders that require hydraulic valves for control. To facilitate installation, several or even a dozen sets of hydraulic valves are installed on a single valve body. The proportional electromagnets corresponding to each hydraulic valve can be integrated together using the same explosion-proof housing 1, and the control boards of the electromagnet drivers 3 corresponding to each electromagnet assembly 2 can be connected in series via a bus for joint control.

[0046] In practice, seals can be installed at the joints of various components as needed to ensure the explosion-proof performance of the proportional electromagnet. For example, a first seal 71 is provided at the joint between the second end of the top rod 23 and the housing body 11, and a sealing ring 72 is provided at the joint between the first sealing cover 4 and the housing body 11.

[0047] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0048] Furthermore, although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0049] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A proportional solenoid characterized by, The application relates to an electromagnetic iron assembly and a driving device thereof.

2. The proportional electromagnet according to claim 1, characterized in that The explosion-proof shell comprises a shell body and an end cover arranged at the first end of the shell body, the electromagnetic iron assembly is arranged in the shell body, and the end cover is provided with a first accommodating groove matched with the armature.

3. The proportional electromagnet according to claim 2, characterized in that The end cover is further provided with a second accommodating groove, the elastic member is sleeved on the outer periphery of the top rod and located in the second accommodating groove, one end of the elastic member abuts against the second accommodating groove, and the other end of the elastic member abuts against the armature.

4. The proportional electromagnet of claim 2, wherein The outer periphery of the armature is sleeved with a shaft sleeve, the outer wall of the shaft sleeve is connected with the inner wall of the coil, the end cover is connected with the inner wall of the coil, and a gap is formed between the end cover and the shaft sleeve.

5. The proportional electromagnet of claim 2, wherein The second end of the shell body is provided with a first sealing cover for sealing the top rod.

6. The proportional electromagnet according to claim 5, characterized in that The first sealing cover is a rubber sealing cover.

7. The proportional electromagnet of claim 5, wherein The second end of the shell body is further provided with a second sealing cover, the second sealing cover is located on the radial outer side of the first sealing cover, and the second sealing cover is connected with the shell body through a fastener.

8. The proportional electromagnet of claim 1, wherein The electromagnetic iron driving device comprises a driving device body and a control plate, the driving device body is arranged outside the explosion-proof shell, the control plate is arranged in the explosion-proof shell and connected with the driving device body through a plug-in connector.

9. The proportional electromagnet of claim 1, wherein The explosion-proof shell is a metal shell.

10. The proportional electromagnet of claim 1, wherein The electromagnetic iron assembly is multiple groups.

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