Mining integrated electromagnet device

Abstract

The invention relates to a mining integrated electromagnet device which comprises an integrally-formed shell, a cavity is formed in the shell, an armature assembly is arranged in the cavity, a yoke is arranged on the lower side of the armature assembly, the yoke and the shell are relatively fixed, the outer side of the armature assembly and the outer side of the yoke are sleeved with a coil assembly, and the coil assembly is arranged in the cavity. The armature assembly slides in the cavities in the vertical direction, the coil assembly is powered on to control the armature assembly to be close to the yoke, reset pieces used for driving the armature assembly to reset are further arranged in the cavities, and the two cavities are formed in the shell in the horizontal direction at intervals. A PCBA board used for controlling on-off of circuits in the two coil assemblies is electrically connected between the two coil assemblies, and an end cover assembly is arranged at the upper end of the shell in the height direction. The device has the advantages of being more integrated in structure, simpler and more convenient to assemble and higher in reliability.

Description

Technical Field

[0001] This application relates to the technical field of electromagnets for hydraulic valves, and in particular to an integrated electromagnet device for mining applications. Background Technology

[0002] The solenoid pilot valve for mining is an important control component in the hydraulic system of hydraulic supports. Its performance directly affects the safety and reliability of the hydraulic support system.

[0003] In related technologies, hydraulic valves are developing towards intelligence, miniaturization, and lightweight design. Existing mining electromagnet assemblies mainly have two structural methods: 1. Split installation method: Both the armature guide sleeve and the yoke are mounted on the housing via interference fit; 2. Integrated installation method: The armature guide sleeve and yoke are connected together by welding, and then machined. The split installation method requires ensuring the coaxiality of the armature guide sleeve and yoke, demanding high machining precision and increasing the difficulty of machining and assembly. The integrated installation method not only increases the welding process but also requires higher welding technology and machining standards.

[0004] Therefore, there is an urgent need for a mining electromagnet device that is more integrated in structure, easier to assemble, and more reliable. Summary of the Invention

[0005] In order to provide a mining electromagnet device with a more integrated structure, simpler assembly, and higher reliability, this application provides an integrated mining electromagnet device.

[0006] The integrated electromagnet device for mining provided in this application adopts the following technical solution: An integrated electromagnet device for mining includes a one-piece molded housing with a cavity formed inside. An armature assembly is disposed within the cavity, and a yoke is disposed below the armature assembly. The yoke is fixed relative to the housing. A coil assembly is sleeved on the outside of the armature assembly and the yoke. The armature assembly slides vertically within the cavity. When the coil assembly is energized, it controls the armature assembly to move closer to the yoke. A reset component for resetting the armature assembly is also disposed within the cavity. Two cavities are formed at intervals along the horizontal direction within the housing. A PCBA board for controlling the on / off state of the circuit within the two coil assemblies is electrically connected between them. An end cap assembly is disposed at the upper end of the housing in the height direction.

[0007] By adopting the above technical solution, two horizontally distributed chambers are formed internally through a one-piece molded shell, respectively accommodating the armature assembly and the yoke, and together with the coil assembly, forming an electromagnet working unit. The PCBA board enables independent on / off control of the two coil assemblies, allowing the electromagnet assembly to complete bidirectional attraction actions according to control signals. The armature assembly moves towards the yoke under the action of electromagnetic force, and is driven back to its original position by a reset component after power is cut off. This structure makes the electromagnet module highly integrated, compact, flexible in control, and easy to assemble and maintain.

[0008] Preferably, the armature assembly includes an armature and a push rod. The lower side of the armature is formed with a groove, the upper end of the push rod is embedded in the groove, the push rod is fixed relative to the armature, and the lower end of the push rod passes through the yoke in the vertical direction and slides with it.

[0009] By adopting the above technical solution, a reliable connection structure is formed by creating a groove on the lower side of the armature and fixing it to the push rod. The push rod passes through the yoke and slides with it, realizing stable guidance and axial movement of the armature assembly, making the engagement and return actions smoother, reducing offset and jamming, and improving the reliability and accuracy of the electromagnetic response.

[0010] Preferably, an upper bearing is sleeved on the upper side of the armature, the upper bearing is embedded in the housing, and the upper end of the armature slides with the upper bearing in the vertical direction.

[0011] By adopting the above technical solution, the upper bearing is embedded inside the housing and slides in conjunction with the upper end of the armature, effectively achieving low-friction guidance of the armature in the vertical direction, improving motion smoothness, and reducing wear. The bearing structure enhances the durability and service life of the electromagnet assembly, ensuring its reliability in environments with frequent operation.

[0012] Preferably, each of the chambers includes a mounting hole for mounting an upper bearing, a sliding hole for mounting an armature assembly is formed on the lower side of the mounting hole, a coil hole for embedding a coil assembly is formed coaxially on the outer side of the sliding hole, an embedding hole for mounting a yoke is also formed at the lower end of the mounting hole, a mounting groove for mounting a PCBA board is formed between the two chambers, and a connecting hole for threading the coil assembly is formed between the mounting groove and the two coil holes respectively.

[0013] By adopting the above technical solution, the installation holes, sliding holes, coil holes and embedding holes are formed sequentially in the cavity, so as to achieve precise positioning and high integration of each functional component. At the same time, the PCBA board mounting slots and connecting holes facilitate electrical connection and cable routing, simplify the assembly process, and improve the overall compatibility and wiring efficiency of the system's electrical and structural modules.

[0014] Preferably, by sequentially forming mounting holes, sliding holes, coil holes, and embedding holes within the cavity, precise positioning and highly integrated arrangement of each functional component are achieved. At the same time, the PCBA board mounting slots and connecting holes facilitate electrical connections and cable routing, simplify the assembly process, and improve the overall compatibility and wiring efficiency of the system's electrical and structural modules.

[0015] By adopting the above technical solution, the lower bearing is sleeved on the push rod and embedded in the bearing hole on the yoke, sliding and engaging with the push rod to ensure the guiding stability of the lower end of the armature assembly and reduce movement deviation. The spring, as a reset component, is installed in the positioning hole. After being energized and engaged, it can quickly spring back when de-energized, effectively realizing the self-reset function and improving response speed and reliability.

[0016] Preferably, the armature further includes an armature block, the upper end of which is provided with a push rod, and the two ends of the armature block along the axial direction are respectively provided with an upper copper washer and a lower copper washer. The upper copper washer is sleeved on the push rod, and the lower copper washer is sleeved on the push rod. The push rod is glued and fixed to the groove on the armature block.

[0017] By adopting the above technical solution, the armature block is connected to the push rod by adhesive bonding, and upper copper pads and lower copper pads are respectively set at both ends. The pads can provide buffering during the attraction or return process, prevent metal-to-metal contact from causing impact, and improve the overall electromagnetic drive performance and structural stability.

[0018] Preferably, the end cap assembly includes a stainless steel end cap that is detachably fixed to the housing, a socket assembly for power supply is installed on the stainless steel end cap, and a dust cap for pressing and pushing the armature assembly is also embedded on the stainless steel end cap, with two dust caps corresponding to the chamber.

[0019] By adopting the above technical solution, the end cap assembly is connected to the housing via a detachable stainless steel end cap, facilitating maintenance and replacement. A socket assembly is also provided for electrical connection / disconnection. Operators can manually engage the armature assembly by pressing the dust cap, thereby pushing it closer to the yoke. Two dust caps covering the top of the chamber effectively prevent dust and moisture from entering the internal working mechanism, improving sealing and the equipment's reliability in mining environments.

[0020] Preferably, the two dust caps are injection molded as a single unit, with an integrally formed mounting plate on each of the two dust caps. The mounting plate has a positioning groove formed on it, and the stainless steel end cap has a protrusion formed on it. The protrusion is embedded in the positioning groove, and the stainless steel end cap is integrally formed with the two dust caps.

[0021] By adopting the above technical solution, the dust cap adopts an injection-molded integrated structure and is integrally formed with the stainless steel end cap. This not only simplifies the manufacturing process but also enhances the overall sealing performance and structural strength, reduces assembly steps and the number of parts, and further improves the integration and anti-pollution capability of the end cap assembly, thus meeting the needs of the mining environment.

[0022] Preferably, any of the coil assemblies includes a frame on which enameled wire is wound, and a lead wire is pulled out from the enameled wire. The lead wire passes through a corresponding through hole and is electrically connected to the PCBA board. A heat shrink tubing is fitted on the lead wire.

[0023] By adopting the above technical solution, the coil assembly is wound with enameled wire through a bobbin, and signal lines are led out to connect to the PCBA board to achieve electromagnetic field control. The leads are protected by heat-shrink tubing and pass through through-holes, improving the mechanical protection performance and electrical safety of the wires and ensuring reliable connection in long-term vibration environments.

[0024] Preferably, an O-ring is fitted at the lower end of the yoke, the yoke is interference-fitted with the embedded hole, a sealing groove is formed at the lower end of the yoke, the lower end of the armature assembly passes through the sealing groove, and a frameless oil seal is provided in the sealing groove.

[0025] By adopting the above technical solution, the yoke is installed in the mounting hole by interference fit, and an O-ring is set at its lower end. A sealing groove is also formed on the lower side. The top rod passes through the sealing groove, and a frameless oil seal is placed inside the sealing groove, which effectively achieves oil sealing and pollution isolation at the lower end of the armature assembly, and improves the sealing performance and service life of the assembly under high humidity and high dust conditions.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the one-piece molded shell structure, multiple functional chambers and holes are directly formed inside the shell, realizing the integrated arrangement of multiple functional components such as armature assembly, yoke, coil assembly, PCBA board, etc., eliminating the welding and complex assembly process, making the overall electromagnet assembly structure more compact and the layout more reasonable, effectively saving installation space; 2. Key components such as the yoke are installed with an interference fit, requiring no additional fastening or welding. The top rod and armature block are relatively fixed, and the end cap assembly adopts a detachable structure. Combined with the standardized plug-in component design, the whole machine has high assembly efficiency and convenient disassembly and maintenance, making it particularly suitable for application environments such as mines where maintenance efficiency is required. 3. An O-ring is installed at the lower end of the yoke, and a frameless oil seal is embedded in the sealing groove. Combined with the injection-molded integrated dust cap structure, a multi-layer sealing protection system is formed, which effectively prevents liquids, dust and water vapor from entering the interior of the electromagnetic mechanism, and significantly improves the adaptability and reliability of the electromagnet device in harsh mining environments such as high humidity and high dust. Attached Figure Description

[0027] Figure 1 This is an isometric view of the overall structure of the integrated electromagnet device for mining, which is the main embodiment of this application. Figure 2 This is a cross-sectional view of the internal structure of the integrated electromagnet device for mining, which is the main feature of this application embodiment. Figure 3 This is a cross-sectional view of the internal structure of the shell, which is the main feature of the embodiments in this application. Figure 4 This is a cross-sectional view of the armature assembly structure, which is the main feature of the embodiments in this application. Figure 5 This application is a cross-sectional view that mainly illustrates the armature assembly structure in another embodiment; Figure 6 This is an isometric view of the main structure of the coil assembly in the embodiments of this application; Figure 7 This is an isometric view of the overall structure of the two dust caps and the mounting plate, which is the main feature of this application embodiment; Figure 8 This is an isometric view of the bottom structure of the stainless steel end cap, which is the main feature of this application embodiment.

[0028] Reference numerals: 1. Housing; 11. Chamber; 111. Insertion hole; 112. Coil hole; 113. Sliding hole; 114. Mounting hole; 12. Mounting groove; 13. Communicating hole; 2. End cap assembly; 21. Stainless steel end cap; 211. Protrusion; 22. Countersunk bolt; 23. Socket assembly; 24. Dust cap; 241. Mounting plate; 242. Positioning groove; 3. Armature assembly; 31. Armature block; 311. Groove; 32. Push rod; 321. Abutment plate; 322. Upper bearing; 323. Upper copper gasket; 33. Push rod; 331. Lower bearing; 332. Lower copper gasket; 333. Spring; 4. Coil assembly; 41. Frame; 42. Enamelled wire; 43. Lead wire; 431. Heat shrink tubing; 5. Yoke; 51. Positioning hole; 52. Bearing hole; 53. Sealing groove; 54. O-ring; 55. Frameless oil seal; 6. PCBA board. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0030] This application discloses an integrated electromagnet device for mining.

[0031] See Figures 1-3The integrated electromagnet device for mining includes a housing 1, within which a chamber 11 is integrally formed. Two chambers 11 are spaced apart along the width of the housing 1. Each chamber 11 includes an insert hole 111 integrally formed on the housing 1 from bottom to top. A coil hole 112 and a sliding hole 113 are coaxially formed on the bottom wall of the insert hole 111. A mounting hole 114 is formed on the bottom wall of the sliding hole 113, penetrating the entire housing 1. An upper bearing 322 is installed in the mounting hole 114, an armature assembly 3 is installed in the sliding hole 113, a coil assembly 4 is installed in the coil hole 112, and a yoke 5 is installed in the insert hole 111. A positioning hole 51 and a bearing hole 52 are formed from top to bottom on the upper end of the yoke 5. A lower bearing 331 is installed in the bearing hole 52, and a reset element, which is a spring 333, is installed in the positioning hole 51.

[0032] A mounting groove 12 is formed between the two chambers 11, through which the housing 1 passes vertically from top to bottom. A connecting hole 13 is formed between the mounting groove 12 and the two coil holes 112. A PCBA board 6 is installed inside the mounting groove 12, and the PCBA board 6 and the wires connected to it are glued inside the mounting groove 12. An end cap assembly 2 can also be detachably fixed to the top of the housing 1.

[0033] See Figure 2 , Figure 4 , Figure 5 The armature assembly 3 includes an armature and a push rod 33. The armature includes an armature block 31 and a push rod 32. A groove 311 is formed on the lower side of the armature block 31 from bottom to top. A threaded groove is formed on the upper circumferential side of the push rod 33. The threaded groove of the push rod 33 is filled with fixing adhesive. The upper end of the push rod 33 is glued to the groove 311 on the armature block 31. In another embodiment, the upper end of the push rod 33 is threaded into the groove 311. Furthermore, the push rod 33 and the groove 311 are glued together.

[0034] The lower end of the push rod 33 passes through the yoke 5 vertically and slides with it. In this embodiment, the push rod 32 and the armature block 31 are integrally formed. The two ends of the armature block 31 along the axial direction are respectively provided with an upper copper washer 323 and a lower copper washer 332. The upper copper washer 323 is sleeved on the push rod 32, and the lower copper washer 332 is sleeved on the push rod 33. In another embodiment, the push rod 32 and the armature block 31 are separate structures. The lower end of the push rod 32 is formed with an abutment plate 321. The upper end of the armature block 31 abuts against the abutment plate 321. The lower end of the armature block 31 is provided with a lower copper washer 332. The lower copper washer 332 is sleeved on the push rod 33. The upper copper washer 323 is sleeved on the push rod 32 and abuts against the side of the abutment plate 321 away from the armature block 31. Spring 333 is sleeved on push rod 33, and the upper side of spring 333 abuts against lower copper washer 332. Push rod 32 passes through upper bearing 322 along its own axis and slides with upper bearing 322 along its own axis; push rod 33 passes through lower bearing 331 along its own axis and slides with lower bearing 331 along its own axis.

[0035] See Figure 2 , Figure 6 Each coil assembly 4 includes a frame 41, on which an enameled wire 42 is wound, and a lead wire 43 is pulled out from the enameled wire 42. The lead wire 43 passes through the corresponding connecting hole 13 and is electrically connected to the PCBA board 6. A heat shrink tubing 431 is sleeved on the lead wire 43.

[0036] See Figures 1-3 , Figure 7 , Figure 8 The end cap assembly 2 includes a stainless steel end cap 21 that is detachably fixed to the housing 1 by countersunk bolts 22. A socket assembly 23 for supplying power to the PCBA board 6 is mounted on the stainless steel end cap 21. The socket assembly 23 may include conductive posts and a threaded housing. A dust cap 24 for pressing and pushing the armature assembly 3 is also embedded in the stainless steel end cap 21. The dust cap 24 is an injection-molded one-piece structure. Two dust caps 24 are correspondingly arranged in the chamber 11. A mounting plate 241 is integrally formed on each of the two dust caps 24. A positioning groove 242 is formed on the mounting plate 241, corresponding to the mounting groove 12. A protrusion 211 is formed on the stainless steel end cap 21, and the protrusion 211 is embedded in the positioning groove 242. The stainless steel end cap 21 and the two dust caps 24 are integrally formed. When manual operation is required, the operator can manually press the dust cap 24. The dust cap 24 pushes the armature assembly 3 to move closer to the yoke 5. The armature block 31 abuts against the yoke 5, thereby causing the push rod 33 to push the valve core of the electromagnetic pilot valve, realizing the manual opening of the electromagnetic pilot valve port.

[0037] An O-ring 54 is embedded on the lower circumferential side of the yoke 5, with the side of the O-ring 54 protruding from the circumferential side of the yoke 5. A sealing groove 53 is also formed at the lower end of the yoke 5. The top rod 33 passes vertically through the positioning hole 51, the bearing hole 52, the yoke 5 body, and the sealing groove 53 in sequence. A frameless oil seal 55 is also installed inside the sealing groove 53. The dust cap 24 at the top and the frameless oil seal 55 and O-ring 54 at the bottom seal the electromagnet structure within the housing 1, achieving pollution isolation in mining scenarios, effectively preventing dust and moisture from entering the housing 1, improving sealing performance and the reliability of the device in mining environments. The implementation principle of the integrated electromagnet device for mining according to this application embodiment is as follows: During the installation operation, the worker first installs the upper bearing 322, the push rod 33 is fixedly connected to the armature block 31 in advance, the upper copper washer 323 is sleeved on the push rod 32 so that the push rod 32 passes through the upper bearing 322, the lower copper washer 332 is installed, and the coil assembly 4 is installed so that the lead wires 43 of the two coil assemblies 4 pass out from the connecting hole 13. Then the yoke 5 is installed so that the push rod 33 passes through the yoke 5 and the lower bearing 331 inside the yoke 5, the O-ring 54 is sleeved on the yoke 5 in advance so that the yoke 5 is interference-fitted with the side wall of the embedded hole 111, and then the frameless oil seal 55 is installed. The PCBA board 6 is installed in the mounting groove 12 so that the two lead wires 43 are electrically connected to the PCBA board 6, and then the stainless steel end cap 21 with the dust cap 24 is fixed to the housing 1 by the countersunk bolt 22. The socket assembly 23 is pre-installed on the stainless steel end cap 21. During use, the operator powers the PCBA board 6 via the socket assembly 23. The PCBA board 6 controls whether to power the corresponding coil assembly 4. When the coil assembly 4 is powered, an electromagnetic field is generated. This electromagnetic field drives the armature assembly 3 to move along its own axis towards the side closer to the yoke 5, which is the attraction process. The air gap between the armature block 31 and the yoke 5 decreases until the lower copper pad 332 abuts against the upper surface of the yoke 5, and the armature assembly 3 stops moving. When the PCBA board 6 controls the coil assembly 4 to be de-powered, the electromagnetic field disappears, and the armature block 31 resets to the side away from the yoke 5 under the action of the spring 333. The armature assembly 3 returns to its initial position, which is the recovery process.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mining integrated electromagnet device, characterized in that: The device includes an integrally formed housing (1), a cavity (11) formed inside the housing (1), an armature assembly (3) is provided inside the cavity (11), a yoke (5) is provided on the lower side of the armature assembly (3), the yoke (5) is fixed relative to the housing (1), a coil assembly (4) is sleeved on the outside of the armature assembly (3) and the yoke (5), the armature assembly (3) slides vertically in the cavity (11), the coil assembly (4) is energized to control the armature assembly (3) to move closer to the yoke (5), a reset member for driving the armature assembly (3) to reset is also provided in the cavity (11), two cavities (11) are formed at intervals in the housing (1) along the horizontal direction, a PCBA board (6) for controlling the circuit opening and closing in the two coil assemblies (4) is electrically connected between the two coil assemblies (4), and an end cap assembly (2) is provided at the upper end of the housing (1) in the height direction.

2. The integrated electromagnet device for mining as described in claim 1, characterized in that: The armature assembly (3) includes an armature and a push rod (33). The lower side of the armature has a groove (311) formed. The upper end of the push rod (33) is embedded in the groove (311). The push rod (33) is fixed relative to the armature. The lower end of the push rod (33) passes through the yoke (5) in the vertical direction and slides with it.

3. The integrated electromagnet device for mining according to claim 2, characterized in that: An upper bearing (322) is fitted on the upper side of the armature. The upper bearing (322) is embedded in the housing (1). The upper end of the armature slides with the upper bearing (322) in the vertical direction.

4. The integrated electromagnet device for mining according to claim 3, characterized in that: Each of the chambers (11) includes a mounting hole (114) for mounting an upper bearing (322), a sliding hole (113) for mounting an armature assembly (3) is formed on the lower side of the mounting hole (114), a coil hole (112) for embedding a coil assembly (4) is formed coaxially on the outer side of the sliding hole (113), an embedding hole (111) for mounting a yoke (5) is also formed at the lower end of the mounting hole (114), a mounting groove (12) for mounting a PCBA board (6) is also formed between the two chambers (11), and a connecting hole (13) for threading the coil assembly (4) is formed between the mounting groove (12) and the two coil holes (112).

5. The integrated electromagnet device for mining according to claim 3, characterized in that: The top rod (33) is also fitted with a lower bearing (331). The yoke (5) is formed with a bearing hole (52) for installing the lower bearing (331). The lower bearing (331) is embedded in the bearing hole (52). The top rod (33) and the lower bearing (331) slide in the vertical direction. The bearing hole (52) is also formed with a positioning hole (51) on the upper side. The reset member is set as a spring (333). The spring (333) is installed in the positioning hole (51). The upper end of the spring (333) abuts against the armature.

6. The integrated electromagnet device for mining according to claim 3, characterized in that: The armature also includes an armature block (31), and a push rod (32) is provided at the upper end of the armature block (31). An upper copper washer (323) and a lower copper washer (332) are respectively provided at both ends of the armature block (31) along the axial direction. The upper copper washer (323) is sleeved on the push rod (32), and the lower copper washer (332) is sleeved on the push rod (33). The push rod (33) is glued to the groove (311) on the armature block (31).

7. The integrated electromagnet device for mining according to claim 1, characterized in that: The end cap assembly (2) includes a stainless steel end cap (21) that is detachably fixed to the housing (1). A socket assembly (23) for power supply is installed on the stainless steel end cap (21). A dust cap (24) for pressing and pushing the armature assembly (3) is also embedded on the stainless steel end cap (21). Two dust caps (24) are provided corresponding to the chamber (11).

8. The integrated electromagnet device for mining according to claim 7, characterized in that: The two dust caps (24) are injection molded as one piece. The two dust caps (24) are integrally formed with mounting plates (241). The mounting plates (241) are formed with positioning grooves (242). The stainless steel end caps (21) are formed with protrusions (211). The protrusions (211) are embedded in the positioning grooves (242). The stainless steel end caps (21) are integrally formed with the two dust caps (24).

9. The integrated electromagnet device for mining according to claim 1, characterized in that: Each of the coil components (4) includes a frame (41) on which an enameled wire (42) is wound, and a lead wire (43) is pulled out from the enameled wire (42). The lead wire (43) passes through the corresponding connecting hole (13) and is electrically connected to the PCBA board (6). A heat shrink tubing (431) is fitted on the lead wire (43).

10. The integrated electromagnet device for mining according to claim 1, characterized in that: The lower end of the yoke (5) is fitted with an O-ring (54), the yoke (5) is press-fitted with the embedded hole (111), the lower end of the yoke (5) is also formed with a sealing groove (53), the lower end of the armature assembly (3) passes through the yoke (5) and through the sealing groove (53), and a frameless oil seal (55) is provided in the sealing groove (53).

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