A special wiring device for AC and DC withstand voltage tests of a generator stator

Abstract

The present invention relates to the technical field of generator set maintenance devices, and discloses a special wiring device for AC and DC withstand voltage tests of a generator stator. It includes a generator set, a mounting plate and a generator platform. A placement frame is connected between the generator set and the mounting plate. A first wiring board is provided on the generator set. In the present invention, the wiring board of the generator stator in the generator set is placed at the seam of the generator head and connected to the grounding device. After it is firmly fixed, the high-voltage connecting wire is connected to the soft connection between the stator winding of the generator set and the enclosed outgoing busbar. The high-voltage wire of the special wiring device for AC and DC withstand voltage tests of the generator stator of the generator set is applied to the three phases A, B, and C of the stator winding of the generator at one time, and the high-voltage wire on the other side is led to the generator platform. During the test, the high-voltage lead of the AC and DC withstand voltage test equipment of the generator is connected to one of the phases, and the other two phases are short-circuited and grounded, and the withstand voltage test of each phase winding is carried out in turn.

Description

Technical Field

[0001] The present invention relates to the technical field of generator set maintenance devices, and particularly to a special wiring device for AC and DC withstand voltage tests of a generator stator. Background Technique

[0002] A generator set is an important device for supplying power to the power grid and ensuring power supply. Particularly important is the insulation condition of the generator. The quality of the insulation directly affects the normal operation of the generator. During maintenance, the generator mainly undergoes AC and DC withstand voltage tests on the stator to check the main insulation strength of the generator and detect local defects. However, in cases where the main insulation of the generator stator coil is damp or the lead insulation distance changes due to coil loosening or displacement caused by vibration, the insulation level cannot be guaranteed. Moreover, currently, there are high requirements for the environment and distance during the test. However, on-site generators often have many equipment and environmental restrictions, and there is no guarantee for the safe distance for applying high voltage during the test process. During the experiment, it is necessary for the staff to repeatedly replace the connectors of the high-voltage connection wires up and down, which is very cumbersome and has low work efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a special wiring device for AC and DC withstand voltage tests of a generator stator to solve the problems raised in the above background technique.

[0004] Technical Solution

[0005] The present invention provides the following technical solution: A special wiring device for AC and DC withstand voltage tests of a generator stator, including a generator set, a mounting plate, and a generator platform. A placement frame is connected between the generator set and the mounting plate. A first wiring board is provided on the generator set, and the first wiring board includes three phases A, B, and C of the generator stator winding. A second wiring board is provided on the mounting plate. A first placement plate and a second placement plate are respectively and fixedly installed inside the placement frame. Placement grooves are respectively opened inside the first placement plate and the second placement plate. A high-voltage connection wire is movably installed inside the placement groove. One end of the high-voltage connection wire is movably connected to the first wiring board and the second wiring board. A first installation cavity is opened inside the second placement plate. A first fixed box and a second fixed box are respectively movably connected to the top end of the first installation cavity. A second installation cavity is opened inside the first fixed box. A first fixing plate and a second fixing plate are respectively and fixedly installed inside the second installation cavity. A third installation cavity is opened inside the second fixed box. A plugging block is movably installed inside the third installation cavity.

[0006] Preferably, a first fixing column is fixedly installed inside the first installation cavity. A first return spring and a first movable plate are respectively movably installed on the outer sides of each of the first fixing columns. The first return spring and the first movable plate are fixedly connected to each other. A first pushing plate is fixedly installed on the adjacent sides of two adjacent first movable plates. The adjacent sides of two adjacent first pushing plates are respectively fixedly connected to the first fixing box and the second fixing box.

[0007] Preferably, a second rotating shaft is movably installed between the inner walls at the top end of the first fixing box. A third bevel gear is fixedly installed at the bottom end of the second rotating shaft.

[0008] Preferably, a first rotating shaft is movably installed between two adjacent first fixing plates. A fourth bevel gear is fixedly installed on the outer side of the first rotating shaft. The third bevel gear and the fourth bevel gear are meshed with each other. One end of the first rotating shaft penetrates through the first fixing plate and a first bevel gear is fixedly installed thereon. A third rotating shaft is movably installed between the opposite inner walls of the second installation cavity. A second bevel gear is fixedly installed on the outer side of the third rotating shaft. The first bevel gear and the second bevel gear are meshed with each other.

[0009] Preferably, thread grooves are provided on the outer side of the third rotating shaft. The arrangement directions of two adjacent thread grooves are opposite. A first moving block is threadedly connected to the thread grooves on the outer side of the third rotating shaft. A second movable plate is fixedly installed on one side of the first moving block. Limit blocks are fixedly installed on the adjacent sides of two adjacent second movable plates.

[0010] Preferably, a second return spring is fixedly installed inside the third installation cavity. A second pushing plate is fixedly installed on the same side of two adjacent second return springs. The side of the second pushing plate close to the first fixing box is fixedly connected to the inserting block. Inserting grooves are provided on both sides of the inserting block.

[0011] Preferably, the inserting block and the inserting grooves are movably connected to each other. The inserting block penetrates through the second fixing plate. The inserting block is located between two adjacent second fixing plates. Beneficial effects

[0012] Compared with the prior art, the present invention provides a special wiring device for AC and DC withstand voltage tests of a generator stator, and has the following beneficial effects:

[0013] 1. The special wiring device for AC and DC withstand voltage test of the generator stator is used. The terminal board of the generator stator in the generator set is placed at the seam of the generator head and connected to the grounding equipment. After it is firmly fixed, the high-voltage connecting line is connected to the stator winding of the generator set and the closed outgoing busbar at the soft connection. The high-voltage line of the special wiring device for AC and DC withstand voltage test of the generator stator of the generator set is added to the three phases A, B, and C of the generator stator winding at one time, and the high-voltage line on the other side is led to the generator platform. During the test, the high-voltage lead of the generator AC and DC withstand voltage test equipment is connected to one of the phases, and the other two phases are short-circuited and grounded, and the withstand voltage test of each phase winding is carried out in turn.

[0014] 2. The special wiring device for AC and DC withstand voltage test of the generator stator is to pull the first fixed box and the second fixed box in different directions respectively, so that the first reset spring inside the first installation cavity will be compressed and elastic, and the high-voltage connecting wire is placed in the placement grooves in the first placement plate and the second placement plate, and the first fixed box and the second fixed box are released, so that the first fixed box and the second fixed box will be close to each other and connected, and the plug-in block in the second fixed box will enter the first fixed box, and the second rotating shaft is rotated. When the second rotating shaft rotates, it will drive the first rotating shaft to rotate through the third bevel gear and the fourth bevel gear, and the first rotating shaft is rotated. When the first rotating shaft rotates, it will drive the first bevel gear to rotate. When the first bevel gear rotates, it will drive the third rotating shaft to rotate through the second bevel gear. When the third rotating shaft rotates, it will drive the second movable plate to move through the first moving block. When the second movable plate moves, it will drive the limit block to penetrate through the second fixed plate and the plug-in slot in the plug-in block to connect with each other. In this way, the first fixed box and the second fixed box will be connected together, and the high-voltage connecting line located in the placement slot will not be separated from the placement slot, which ensures the stability of the high-voltage connecting line during the experiment, and also ensures that adjacent high-voltage connecting lines will not be confused, thereby improving the accuracy of data during the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] Figure 1 This is the wiring diagram for the DC withstand voltage test of the generator of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 3 A top view of the placement frame of the present invention;

[0019] Figure 4 This is a schematic diagram of a first placement plate of the present invention;

[0020] Figure 5 This is a schematic diagram of a second placement plate of the present invention;

[0021] Figure 6 It is a top view cross-sectional view of the second placement plate of the present invention;

[0022] Figure 7 It is a top view cross-sectional view of the first fixed box of the present invention;

[0023] Figure 8 It is a top view cross-sectional view of the second fixed box of the present invention;

[0024] Figure 9 It is a top view cross-sectional view of the connection between the first fixed box and the second fixed box of the present invention.

[0025] In the figure: 1, generator set; 2, mounting plate; 3, first wiring board; 4, second wiring board; 5, placement frame; 6, first placement plate; 7, second placement plate; 8, high-voltage connection wire; 9, placement groove; 10, first push plate; 11, first fixed box; 12, second fixed box; 13, first fixed column; 14, first return spring; 15, first movable plate; 16, first fixed plate; 17, second fixed plate; 18, first rotating shaft; 19, second rotating shaft; 20, first helical gear; 21, third rotating shaft; 22, second helical gear; 23, first moving block; 24, second movable plate; 25, limit block; 26-, second return spring; 27-, second push plate; 28-, insertion block; 29-insertion slot. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1: Please refer to Figure 1, the present invention provides a technical solution: a special wiring device for AC and DC withstand voltage tests of a generator stator, including a generator set 1, a mounting plate 2 and a generator platform. A placement frame 5 is connected between the generator set 1 and the mounting plate 2. A first wiring board 3 is provided on the generator set 1, and the first wiring board 3 includes three phases A, B, and C of the generator stator winding. A second wiring board 4 is provided on the mounting plate 2. A first placement plate 6 and a second placement plate 7 are respectively fixedly installed inside the placement frame 5. Placement grooves 9 are opened inside the first placement plate 6 and the second placement plate 7. High-voltage connecting wires 8 are movably installed inside the placement grooves 9. One end of the high-voltage connecting wire 8 is movably connected to the first wiring board 3 and the second wiring board 4. A first installation cavity is opened inside the second placement plate 7. A first fixing box 11 and a second fixing box 12 are respectively movably connected to the top end of the first installation cavity. A second installation cavity is opened inside the first fixing box 11. A first fixing plate 16 and a second fixing plate 17 are respectively fixedly installed inside the second installation cavity. A third installation cavity is opened inside the second fixing box 12. A plug-in block 28 is movably installed inside the third installation cavity.

[0028] Working principle of this embodiment: When in use, place the wiring board of the generator stator in the generator head seam of the generator set 1 and connect it to the grounding device. After it is firmly fixed, connect the high-voltage connecting wire 8 to the soft connection between the generator stator winding and the enclosed outgoing busbar of the generator set 1. Apply the high-voltage wire of the special wiring device for AC and DC withstand voltage tests of the generator stator of the generator set 1 to the three phases A, B, and C of the generator stator winding at one time, and lead the high-voltage wire on the other side to the generator platform. During the test, connect the high-voltage lead of the generator AC and DC withstand voltage test equipment to one of the phases, and short-circuit and ground the other two phases, and perform the withstand voltage test on each phase winding in turn.

[0029] Embodiment Two: Please refer to Figures 2 - 9, the present invention provides a technical solution: a special wiring device for AC and DC withstand voltage tests of a generator stator, including a generator set 1, a mounting plate 2 and a generator platform. A placement frame 5 is connected between the generator set 1 and the mounting plate 2. A first wiring board 3 is provided on the generator set 1, and the first wiring board 3 includes three phases A, B, and C of the generator stator winding. A second wiring board 4 is provided on the mounting plate 2. A first placement plate 6 and a second placement plate 7 are respectively and fixedly installed inside the placement frame 5. Placement grooves 9 are opened inside both the first placement plate 6 and the second placement plate 7. A high-voltage connection wire 8 is movably installed inside the placement groove 9. One end of the high-voltage connection wire 8 is movably connected to the first wiring board 3 and the second wiring board 4. A first installation cavity is opened inside the second placement plate 7. A first fixed box 11 and a second fixed box 12 are respectively and movably connected to the top end of the first installation cavity. A second installation cavity is opened inside the first fixed box 11. A first fixing plate 16 and a second fixing plate 17 are respectively and fixedly installed inside the second installation cavity. A third installation cavity is opened inside the second fixed box 12. A plug-in block 28 is movably installed inside the third installation cavity.

[0030] In this embodiment, a first fixed column 13 is fixedly installed inside the first installation cavity. A first return spring 14 and a first movable plate 15 are respectively and movably installed on the outer side of each first fixed column 13. The first return spring 14 and the first movable plate 15 are fixedly connected. A first pushing plate 10 is fixedly installed on the adjacent side of two adjacent first movable plates 15. The adjacent sides of two adjacent first pushing plates 10 are respectively fixedly connected to the first fixed box 11 and the second fixed box 12.

[0031] In this embodiment, a second rotating shaft 19 is movably installed between the inner walls of the top end of the first fixed box 11. A third bevel gear is fixedly installed at the bottom end of the second rotating shaft 19.

[0032] In this embodiment, a first rotating shaft 18 is movably installed between two adjacent first fixing plates 16. A fourth bevel gear is fixedly installed on the outer side of the first rotating shaft 18. The third bevel gear and the fourth bevel gear are meshed and connected. One end of the first rotating shaft 18 penetrates through the first fixing plate 16 and a first bevel gear 20 is fixedly installed. A third rotating shaft 21 is movably installed between the opposite inner walls of the second installation cavity. A second bevel gear 22 is fixedly installed on the outer side of the third rotating shaft 21. The first bevel gear 20 and the second bevel gear 22 are meshed and connected.

[0033] In this embodiment, a thread groove is provided on the outer side of the third rotating shaft 21, and the arrangement directions of adjacent two thread grooves are opposite. A first moving block 23 is threadedly connected to the outer side of the thread groove of the third rotating shaft 21. A second movable plate 24 is fixedly installed on one side of the first moving block 23. Limiting blocks 25 are fixedly installed on the adjacent sides of adjacent two second movable plates 24. First through holes matching the second movable plate 24 are respectively formed through the interiors of the first fixing plate 16 and the second fixing plate 17.

[0034] In this embodiment, a second return spring 26 is fixedly installed inside the third installation cavity. A second pushing plate 27 is fixedly installed on the same side of adjacent two second return springs 26. The side of the second pushing plate 27 close to the first fixed box 11 is fixedly connected to a plug-in block 28. Plug-in grooves 29 are formed on both sides of the plug-in block 28.

[0035] In this embodiment, the plug-in block 28 is movably connected with the plug-in groove 29. The plug-in block 28 penetrates through the second fixing plate 17, and the plug-in block 28 is located between adjacent two second fixing plates 17.

[0036] Working principle of this embodiment: When in use, the first fixed box 11 and the second fixed box 12 are respectively pulled in different directions. In this way, the first return spring 14 inside the first installation cavity will be compressed and have elasticity. The high-voltage connecting wire 8 is placed in the placement groove 9 in the first placement plate 6 and the second placement plate 7. The first fixed box 11 and the second fixed box 12 are released. In this way, the first fixed box 11 and the second fixed box 12 will approach and connect to each other. The plug-in block 28 in the second fixed box 12 will enter the first fixed box 11. The second rotating shaft 19 is rotated. When the second rotating shaft 19 rotates, it will drive the first rotating shaft 18 to rotate through the third bevel gear and the fourth bevel gear. When the first rotating shaft 18 rotates, it will drive the first bevel gear 20 to rotate. When the first bevel gear 20 rotates, it will drive the third rotating shaft 21 to rotate through the second bevel gear 22. When the third rotating shaft 21 rotates, it will drive the second movable plate 24 to move through the first moving block 23. When the second movable plate 24 moves, it will drive the limiting block 25 to penetrate through the second fixing plate 17 and be connected with the plug-in groove 29 in the plug-in block 28. In this way, the first fixed box 11 and the second fixed box 12 will be connected together, and the high-voltage connecting wire 8 located in the placement groove 9 will not break away from the placement groove 9, ensuring the stability of the high-voltage connecting wire 8 during the experiment and also ensuring that adjacent high-voltage connecting wires 8 will not be disordered, improving the accuracy of data during the experiment.

Claims

1. A special wiring device for AC and DC withstand voltage tests of a generator stator, comprising a generator set (1), a mounting plate (2) and a generator platform. A placement frame (5) is connected between the generator set (1) and the mounting plate (2). A first wiring board (3) is provided on the generator set (1), and the first wiring board (3) includes three phases A, B, and C of the generator stator winding. A second wiring board (4) is provided on the mounting plate (2), and it is characterized in that: Inside the placement frame (5), a first placement plate (6) and a second placement plate (7) are fixedly installed respectively. Placement grooves (9) are opened inside both the first placement plate (6) and the second placement plate (7). A high-voltage connecting wire (8) is movably installed inside the placement groove (9). One end of the high-voltage connecting wire (8) is movably connected to the first wiring board (3) and the second wiring board (4). A first installation cavity is opened inside the second placement plate (7). A first fixing box (11) and a second fixing box (12) are movably connected to the top end of the first installation cavity respectively. A second installation cavity is opened inside the first fixing box (11). A first fixing plate (16) and a second fixing plate (17) are fixedly installed inside the second installation cavity respectively. A third installation cavity is opened inside the second fixing box (12). A plug-in block (28) is movably installed inside the third installation cavity; A first fixing column (13) is fixedly installed inside the first installation cavity. A first return spring (14) and a first movable plate (15) are movably installed on the outer side of each first fixing column (13) respectively. The first return spring (14) and the first movable plate (15) are fixedly connected. A first push plate (10) is fixedly installed on the adjacent side of two adjacent first movable plates (15). The adjacent sides of two adjacent first push plates (10) are fixedly connected to the first fixing box (11) and the second fixing box (12) respectively; A second rotating shaft (19) is movably installed between the inner walls of the top end of the first fixing box (11). A third bevel gear is fixedly installed at the bottom end of the second rotating shaft (19); A first rotating shaft (18) is movably installed between two adjacent first fixing plates (16). A fourth bevel gear is fixedly installed on the outer side of the first rotating shaft (18). The third bevel gear and the fourth bevel gear are meshed. One end of the first rotating shaft (18) penetrates through the first fixing plate (16) and a first bevel gear (20) is fixedly installed. A third rotating shaft (21) is movably installed between the opposite inner walls of the second installation cavity. A second bevel gear (22) is fixedly installed on the outer side of the third rotating shaft (21). The first bevel gear (20) and the second bevel gear (22) are meshed; Thread grooves are arranged on the outer side of the third rotating shaft (21). The arrangement directions of two adjacent thread grooves are opposite. A first moving block (23) is threadedly connected to the thread groove on the outer side of the third rotating shaft (21). A second movable plate (24) is fixedly installed on one side of the first moving block (23). Limit blocks (25) are fixedly installed on the adjacent side of two adjacent second movable plates (24).

2. The special wiring device for AC and DC withstand voltage tests of a generator stator according to claim 1, characterized in that: A second return spring (26) is fixedly installed inside the third installation cavity. A second push plate (27) is fixedly installed on the same side of two adjacent second return springs (26). The side of the second push plate (27) close to the first fixing box (11) is fixedly connected to the plug-in block (28). Plug-in grooves (29) are opened on both sides of the plug-in block (28).

3. The special wiring device for AC and DC withstand voltage tests of a generator stator according to claim 1 or 2, characterized in that: The plug-in block (28) is movably connected to the plug-in groove (29). The plug-in block (28) passes through the second fixing plate (17), and the plug-in block (28) is located between two adjacent second fixing plates (17).

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