An auxiliary terminal box for a doubly-fed generator

Abstract

The application relates to an auxiliary junction box for a double-fed generator and relates to the technical field of workpiece welding, which comprises a junction box body and a junction box cover plate, the junction box cover plate is covered above the junction box body, the junction box body and the junction box cover plate are both formed by bending a carbon steel plate, a plurality of mounting holes are arranged on the side wall and the lower bottom surface of the junction box body, the mounting holes are used for mounting cables, the left and right ends of the inner bottom surface of the junction box body are respectively fixedly connected with a high-added gusset plate, a wire binding frame assembly and a guide rail assembly are fixedly installed between the two high-added gusset plates. The junction box body and the junction box cover plate are manufactured by using the method of bending a carbon steel plate, the size specification of the junction box can be adjusted according to needs, the use adaptability of the junction box is improved, meanwhile, no mould needs to be manufactured for junction boxes with different size specifications in the manufacturing process, the manufacturing cost of the junction box is effectively reduced, and the manufacturing period of the junction box is shortened.

Description

Technical Field

[0001] This application relates to the field of electrical equipment wiring technology, and in particular to an auxiliary junction box for a doubly-fed generator. Background Technology

[0002] Doubly fed induction generators (DFIGs) are widely used in wind power systems. Their operation is complex, involving multiple electrical connections, especially the wiring between the stator and rotor. Improper wiring or unstable connections can lead to system instability or even electrical faults.

[0003] In the existing technology, junction boxes are all made of aluminum and manufactured by casting. Due to the different number of wires and wire sizes required inside the junction boxes for different applications, junction boxes need to be available in various sizes. Each size of junction box requires corresponding design and manufacturing molds, which presents the following problems: 1. Each type of junction box requires a custom-designed and manufactured mold, resulting in high manufacturing costs; 2. Manufacturing new-size junction boxes requires waiting for the molds to be completed, resulting in a long production cycle; 3. The use of standard junction boxes results in poor adaptability to on-site wiring conditions. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this application provides an auxiliary junction box for a doubly-fed generator.

[0005] This application provides an auxiliary junction box for a doubly-fed generator, which adopts the following technical solution: An auxiliary junction box for a doubly-fed generator includes a junction box body and a junction box cover. The junction box cover is installed on top of the junction box body. Both the junction box body and the junction box cover are formed by bending carbon steel plates. Several mounting holes are provided on the side walls and bottom surface of the junction box body for installing cables. A heightening pad is fixedly connected to the left and right ends of the bottom surface of the junction box body. A cable tie assembly and a guide rail assembly are fixedly installed between the two heightening pads.

[0006] In one alternative implementation, each raised plate has a mounting bolt threaded to both its front and rear ends, which secures the junction box to the intended position.

[0007] In one alternative implementation, each heightening pad has a grounding clamping bolt threaded to both its front and rear ends.

[0008] In one optional embodiment, the cable tie assembly includes two first support columns and a frame. The two first support columns are respectively fixedly connected to two raised pads. The top of the first support column is provided with a threaded hole. The left and right ends of the frame are respectively fixedly connected to the top of the first support column by bolts.

[0009] In one optional embodiment, the guide rail assembly includes two second support columns and a guide rail body. The two second support columns are respectively fixedly connected to two raised pads. The top of the second support column is provided with a threaded hole. The left and right ends of the guide rail body are respectively fixedly connected to the top of the second support column by bolts.

[0010] In one optional embodiment, the upper part of the junction box body is provided with a plurality of recesses, and the bottom surface of the recesses is provided with a first threaded hole. The bottom surface of the junction box cover is fixedly connected with a positioning block corresponding to the recesses. The positioning block is provided with a second threaded hole corresponding to the first threaded hole, which penetrates the junction box cover and the positioning block in the vertical direction. A bolt is inserted to install the junction box cover on the top of the junction box body.

[0011] In one optional embodiment, a protective sleeve assembly corresponding to each mounting hole is fixedly connected to the inner wall of the junction box. The protective sleeve assembly includes a connecting pipe and a protective cover. The connecting pipe is fixedly connected to the inner wall of the junction box. The end of the connecting pipe away from the junction box is provided with a bevel. The length of the upper end of the connecting pipe is less than the length of the lower end of the connecting pipe. A connecting bracket is fixedly connected to the upper surface of the connecting pipe. The protective cover is rotatably connected to the protective bracket.

[0012] In one optional embodiment, the sheath assembly further includes a sealing kit, which comprises: a mounting box, a sealing block, and a control plate. The mounting box is fixedly connected to the upper surface of the connecting pipe, and the inner cavity of the mounting box is connected to the inner hole of the connecting pipe. A sliding groove is provided on the side wall of the mounting box. The sealing block is slidably connected to the inner cavity of the mounting box in the vertical direction. A rubber block is fixedly connected to the bottom surface of the sealing block. The control plate is fixedly connected to the side wall of the sealing block and extends out from the sliding groove. A control rod is fixedly connected to the lower surface of the control plate. A limit hole is also provided on the upper surface of the connecting pipe. The control rod is slidably connected to the limit hole in the vertical direction. A spring is fixedly connected between the bottom surface of the control rod and the bottom surface of the limit hole.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. By using carbon steel plate bending to manufacture the junction box body and junction box cover, the size and specifications of the junction box can be adjusted as needed, improving the adaptability of the junction box.

[0014] 2. By using carbon steel plates to bend and form the junction box body and junction box cover, the manufacturing process eliminates the need to create molds for junction boxes of different sizes and specifications, effectively reducing the manufacturing cost and shortening the manufacturing cycle of the junction boxes.

[0015] 3. By setting a raised pad on the bottom surface of the junction box, it is easier to tap the screw holes corresponding to the mounting bolts and ground wire clamping bolts, which reduces the manufacturing difficulty of the junction box and improves the installation stability of the first support column and the second support column, thereby extending the service life of the junction box.

[0016] 4. By setting the first and second support columns, the height of the frame and guide rail body can be adjusted according to usage requirements, further improving the adaptability of the junction box.

[0017] 5. The frame and guide rail are fixed with bolts, which improves the ease of installation of the frame and guide rail. At the same time, it allows for the individual replacement of the frame or guide rail when it is damaged, thereby increasing the service life of the junction box.

[0018] 6. The sheath assembly isolates the junction box from the outside, ensuring cleanliness inside the box and securing the cables to prevent damage from accidental movement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure provided in the embodiments of this application; Figure 2 This is a top view of the internal structure of the junction box body according to an embodiment of this application; Figure 3 yes Figure 2 Cross-sectional view at point AA (only one set of sheath components is shown); Figure 4 yes Figure 3 A magnified view of a section at point B in the middle; Figure 5 yes Figure 3 A magnified view of a section at point C; Figure 6 yes Figure 5 A magnified view of a section at point D.

[0020] Explanation of reference numerals in the attached drawings: 1. Junction box body; 2. Junction box cover; 3. Mounting hole; 4. Heightening pad; 5. Mounting bolt; 6. Grounding bolt; 7. First support column; 8. Frame; 9. Second support column; 10. Guide rail body; 11. Slot; 12. First threaded hole; 13. Positioning block; 14. Second threaded hole; 15. Connecting pipe; 16. Protective cover; 17. Inclined surface; 18. Connecting frame; 19. Mounting box; 20. Sliding groove; 21. Sealing block; 22. Rubber block; 23. Control panel; 24. Control rod; 25. Limiting hole; 26. Spring. Detailed Implementation

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0025] The present invention provides the following embodiments. Example 1 This application discloses an auxiliary junction box for a doubly-fed generator, referring to... Figure 1The junction box includes a junction box body 1 and a junction box cover 2. The junction box cover 2 is installed on top of the junction box body 1. Both the junction box body 1 and the junction box cover 2 are formed by bending carbon steel plates. Several mounting holes 3 are provided on the side walls and bottom surface of the junction box body 1. The mounting holes 3 are used to install cables. A heightening pad 4 is fixedly connected to the left and right ends of the bottom surface of the junction box body 1. A cable tie assembly and a guide rail assembly are fixedly installed between the two heightening pads 4.

[0026] In one alternative implementation, refer to Figures 2-3 Each of the raised pads 4 has a mounting bolt 5 threaded to both the front and rear ends, and the mounting bolt 5 installs the junction box 1 in the position of use.

[0027] In one alternative implementation, each of the raised pads 4 is threaded with a grounding bolt 6 at both the front and rear ends.

[0028] In one optional embodiment, the cable tie assembly includes two first support columns 7 and a frame 8. The two first support columns 7 are respectively fixedly connected to two raised pads 4. The top of the first support column 7 is provided with a threaded hole. The left and right ends of the frame 8 are respectively fixedly connected to the top of the first support column 7 by bolts.

[0029] In one optional embodiment, the guide rail assembly includes two second support columns 9 and a guide rail body 10. The two second support columns 9 are respectively fixedly connected to two raised pads 4. The top end of the second support column 9 is provided with a threaded hole. The left and right ends of the guide rail body 10 are respectively fixedly connected to the top end of the second support column 9 by bolts.

[0030] In one alternative implementation, refer to Figures 3-4 The junction box body 1 has several recessed grooves 11 on its upper part. The bottom surface of the recessed grooves 11 has a first threaded hole 12. The bottom surface of the junction box cover plate 2 is fixedly connected with a positioning block 13 that corresponds to the recessed grooves 11. The positioning block 13 has a second threaded hole 14 that passes through the junction box cover plate 2 and the positioning block 13 in the vertical direction and corresponds to the first threaded hole 12. A bolt is inserted to install the junction box cover plate 2 on the top of the junction box body 1.

[0031] The working principle and beneficial effects of the above technical solution are as follows: By using carbon steel plate bending to manufacture the junction box body 1 and junction box cover 2, the size and specifications of the junction box can be adjusted as needed, improving the adaptability of the junction box. At the same time, there is no need to make molds for junction boxes of different sizes and specifications during the manufacturing process, which effectively reduces the manufacturing cost of the junction box and shortens the manufacturing cycle.

[0032] By setting a raised pad 4 on the bottom surface inside the junction box body 1, it is easier to tap the screw holes corresponding to the mounting bolts 5 and the ground wire clamping bolts 6, which reduces the manufacturing difficulty of the junction box and improves the installation stability of the first support column 7 and the second support column 9, thereby improving the manufacturing quality of the junction box.

[0033] With the first support column 7 and the second support column 9, the height of the frame 8 and the guide rail body 10 can be adjusted according to usage requirements, further improving the adaptability of the junction box. The frame 8 and the guide rail body 10 are fixed with bolts, which improves the ease of installation of the frame 8 and the guide rail body 10. At the same time, it allows for the individual replacement of the frame 8 or the guide rail body 10 when it is damaged, thereby improving the service life of the junction box.

[0034] By setting the recess 11 and the positioning block 13, accurate positioning is achieved when the junction box body 1 is connected to the junction box cover 2, ensuring accurate correspondence between the first threaded hole 12 and the second threaded hole 14, facilitating bolt insertion and improving the efficiency of the junction box.

[0035] Example 2 Based on Example 1, referring to Figures 3-5 The inner wall of the junction box 1 is also fixedly connected with a protective sleeve assembly corresponding to the mounting hole 3. The protective sleeve assembly includes a connecting pipe 15 and a protective cover 16. The connecting pipe 15 is fixedly connected to the inner wall of the junction box 1. The end of the connecting pipe 15 away from the junction box 1 is provided with a bevel 17. The length of the upper end of the connecting pipe 15 is less than the length of the lower end of the connecting pipe 15. A connecting bracket 18 is fixedly connected to the upper surface of the connecting pipe 15. The protective cover 16 is rotatably connected to the protective bracket.

[0036] In one alternative implementation, refer to Figures 4-6 The sheath assembly also includes a sealing kit, which includes: a mounting box 19, a sealing block 21, and a control plate 23. The mounting box 19 is fixedly connected to the upper surface of the connecting pipe 15. The inner cavity of the mounting box 19 is connected to the inner hole of the connecting pipe 15. A sliding groove 20 is provided on the side wall of the mounting box 19. The sealing block 21 is slidably connected to the inner cavity of the mounting box 19 in the vertical direction. A rubber block 22 is fixedly connected to the bottom surface of the sealing block 21. The control plate 23 is fixedly connected to the side wall of the sealing block 21. The control plate 23 extends out from the sliding groove 20. A control rod 24 is fixedly connected to the lower surface of the control plate 23. A limit hole 25 is also provided on the upper surface of the connecting pipe 15. The control rod 24 is slidably connected to the limit hole 25 in the vertical direction. A spring 26 is fixedly connected between the bottom surface of the control rod 24 and the bottom surface of the limit hole 25.

[0037] The working principle and beneficial effects of the above technical solution are as follows: When no cable is inserted into the mounting hole 3, the protective cover 16 seals the end of the connecting pipe 15 away from the inner wall of the junction box 1, thereby preventing external dust, debris and other objects from entering the junction box 1 through the mounting hole 3. The inclined surface 17 ensures a tight connection between the protective cover 16 and the connecting pipe 15, and improves the isolation effect of the protective cover 16.

[0038] During the insertion of the cable into the mounting hole 3, the protective cover 16 rotates under the action of the cable, thereby pressing down the control plate 23 and causing the sealing block 21 to move downward. Through the tight contact between the rubber block 22 and the outer surface of the cable, the junction box 1 is isolated from the outside when the cable is inserted into the mounting hole 3, ensuring the cleanliness of the inside of the junction box 1. At the same time, the cable is fixed in the connecting tube 15 under the squeezing action of the rubber block 22.

[0039] After the cable is pulled out of the mounting hole 3, the protective cover 16 returns to its initial position under the action of gravity, and at the same time, the control plate 23 returns to its initial position under the action of the spring 26. The rubber block 22 no longer squeezes the cable surface, making it easier to pull out the cable.

[0040] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. An auxiliary junction box for a doubly-fed generator, characterized in that: The junction box includes a junction box body (1) and a junction box cover (2). The junction box cover (2) is installed on top of the junction box body (1). Both the junction box body (1) and the junction box cover (2) are formed by bending carbon steel plates. Several mounting holes (3) are provided on the side wall and bottom surface of the junction box body (1). The mounting holes (3) are used to install cables. A heightening pad (4) is fixedly connected to the left and right ends of the bottom surface of the junction box body (1). A cable tie assembly and a guide rail assembly are fixedly installed between the two heightening pads (4).

2. An auxiliary junction box for a doubly-fed generator according to claim 1, characterized in that: Each raised plate (4) has a threaded mounting bolt (5) at both ends, which installs the junction box (1) in the position of use.

3. An auxiliary junction box for a doubly-fed generator according to claim 1, characterized in that: Each of the raised pads (4) has a ground wire clamping bolt (6) threaded to both the front and rear ends.

4. An auxiliary junction box for a doubly-fed generator according to claim 1, characterized in that: The cable tie assembly includes two first support columns (7) and a frame (8). The two first support columns (7) are fixedly connected to two raised pads (4) respectively. The top of the first support column (7) is provided with a threaded hole. The left and right ends of the frame (8) are fixedly connected to the top of the first support column (7) by bolts respectively.

5. An auxiliary junction box for a doubly-fed generator according to claim 1, characterized in that: The guide rail assembly includes two second support columns (9) and a guide rail body (10). The two second support columns (9) are fixedly connected to two raised pads (4) respectively. The top of the second support column (9) is provided with a threaded hole. The left and right ends of the guide rail body (10) are fixedly connected to the top of the second support column (9) by bolts respectively.

6. An auxiliary junction box for a doubly-fed generator according to claim 1, characterized in that: The junction box body (1) is provided with several recessed grooves (11) on its upper part. The bottom surface of the recessed grooves (11) is provided with first threaded holes (12). The bottom surface of the junction box cover (2) is fixedly connected with positioning blocks (13) that correspond one-to-one with the recessed grooves (11). The positioning blocks (13) are provided with second threaded holes (14) that correspond one-to-one with the first threaded holes (12) and penetrate the junction box cover (2) and the positioning blocks (13) in the vertical direction. Bolts are inserted to install the junction box cover (2) on the top of the junction box body (1).

7. An auxiliary junction box for a doubly-fed generator according to claim 1, characterized in that: The inner wall of the junction box body (1) is also fixedly connected with a protective sleeve assembly corresponding to the mounting hole (3). The protective sleeve assembly includes a connecting pipe (15) and a protective cover (16). The connecting pipe (15) is fixedly connected to the inner wall of the junction box body (1). The end of the connecting pipe (15) away from the junction box body (1) is provided with a bevel (17). The length of the upper end of the connecting pipe (15) is less than the length of the lower end of the connecting pipe (15). A connecting bracket (18) is fixedly connected to the upper surface of the connecting pipe (15). The protective cover (16) is rotatably connected to the protective bracket.

8. An auxiliary junction box for a doubly-fed generator according to claim 7, characterized in that: The sheath assembly also includes a sealing kit, which includes: a mounting box (19), a sealing block (21), and a control plate (23). The mounting box (19) is fixedly connected to the upper surface of the connecting pipe (15), and the inner cavity of the mounting box (19) is connected to the inner hole of the connecting pipe (15). A sliding groove (20) is provided on the side wall of the mounting box (19). The sealing block (21) is slidably connected in the inner cavity of the mounting box (19) in the vertical direction, and the bottom surface of the sealing block (21) is fixedly connected to... There is a rubber block (22), and a control plate (23) is fixedly connected to the side wall of the sealing block (21). The control plate (23) extends out from the sliding groove (20). A control rod (24) is fixedly connected to the lower surface of the control plate (23). A limit hole (25) is also provided on the upper surface of the connecting pipe (15). The control rod (24) is slidably connected in the limit hole (25) in the up and down direction. A spring (26) is fixedly connected between the bottom surface of the control rod (24) and the bottom surface of the limit hole (25).

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