A tin-foil winding device for stator bar voltage-withstanding experiment

Abstract

This utility model relates to the technical field of stator bar pressure resistance testing, and discloses a foil wrapping device for stator bar pressure resistance testing, including a wooden box and a lid hinged to the upper end of the wooden box; the wooden box is provided with multiple tooling slots adapted to the stator bars, the tooling slots are filled with 0.5mm sponge, and 0.03mm copper foil is glued to the sponge; the lid is fixed by a locking piece provided on the front side of the wooden box after being flipped downwards; the support assembly includes fixed brackets provided on the left and right sides of the lower end of the wooden box, and a support plate and a fixing rod provided on the upper end of the fixed brackets. This foil wrapping device for stator bar pressure resistance testing, with multiple tooling slots in the wooden box, can accommodate and withstand the pressure of multiple sets of stator bars at one time, eliminating the need to wrap each bar with foil individually as in the traditional method, saving tedious wrapping operations, adapting to the efficient testing needs of mass production or maintenance scenarios, and improving the safety factor and accuracy of the testing process.

Description

Technical Field

[0001] This utility model relates to the technical field of stator bar pressure resistance test, specifically a tin foil wrapping device for stator bar pressure resistance test. Background Technology

[0002] Stator bars are the basic units that make up the stator windings of a generator. In the field of motor manufacturing and maintenance, the withstand voltage test of stator bars is a key link to ensure the safe and stable operation of the motor. The test results are directly related to the overall insulation reliability and service life of the motor. When conducting withstand voltage tests on stator bars, the industry generally adopts the traditional method of wrapping with tin foil, that is, manually wrapping or enclosing tin foil around the straight section of the stator bar to construct the conductive contact structure required for withstand voltage testing.

[0003] However, the traditional method has obvious drawbacks: on the one hand, the tin foil is soft and easily damaged, and the manual wrapping process requires operation on each wire bar one by one, which is cumbersome, time-consuming, and has extremely low testing efficiency, making it difficult to meet the timeliness requirements of mass production or maintenance; on the other hand, it is difficult to ensure the consistency of the fit and sealing of the manually wrapped tin foil, which is prone to problems such as incomplete wrapping, local wrinkles or gaps, resulting in unstable conductive contact during the testing process. This may not only affect the accuracy of the withstand voltage test results, but also pose safety hazards such as partial discharge caused by poor contact, resulting in a low safety factor.

[0004] Therefore, this utility model provides a tin foil wrapping device for stator bar pressure resistance test to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a tin foil wrapping device for stator bar withstand voltage testing, which solves the obvious defects of the traditional method mentioned in the background art: on the one hand, tin foil is soft and easily damaged, and the manual wrapping process requires operation on each bar individually, which is cumbersome, time-consuming, and has extremely low testing efficiency, making it difficult to meet the timeliness requirements of mass production or maintenance; on the other hand, it is difficult to ensure the consistency of the fit and sealing of manually wrapped tin foil, which is prone to problems such as incomplete wrapping, local wrinkles or gaps, resulting in unstable conductive contact during the test. This may not only affect the accuracy of the withstand voltage test results, but also pose safety hazards such as partial discharge caused by poor contact, resulting in a low safety factor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tin foil wrapping device for stator bar pressure resistance test, comprising a wooden box and a box cover hinged to the upper end of the wooden box;

[0007] Also includes:

[0008] The wooden box is provided with multiple tooling slots that are compatible with the stator bars. The tooling slots are filled with 0.5mm sponge, and 0.03mm copper foil is glued on the sponge. The box cover is flipped down and fixed by a locking piece provided on the front side of the wooden box.

[0009] The support assembly includes fixed brackets on the left and right sides of the lower end of the wooden box, and a support plate and a fixing rod on the upper end of the fixed brackets. The support plate and the fixing rod together drive the wooden box to form a lifting structure at the upper end of the fixed brackets, while the wooden box forms a disassembly structure at the upper end of the support plate.

[0010] Preferably, the upper end of the fixed bracket has a through hole, and a fixing rod is inserted through the through hole, the fixing rod being fixed to the lower end of the support plate.

[0011] Preferably, the fixing rod forms an up-and-down sliding structure in the through hole, and the fixing rod and the fixing bracket are limited by a fixing bolt that passes through the outer side of the upper end of the fixing bracket.

[0012] Preferably, the upper end of the support plate is provided with a rubber pad, and the rubber pad is attached to the lower end of the wooden box.

[0013] Preferably, mounting rods are fixed on both the left and right sides of the lower end of the wooden box, and the mounting rods pass through the rubber pads and are inserted into the middle of the support plate. The outer surface of the mounting rods is threaded with mounting caps, and the mounting caps are fitted to the lower end of the support plate.

[0014] Preferably, the locking component includes a movable pressure plate rotatably connected to the front end of the wooden box, a limiting block fixed to the upper end of the box cover, a fixing post fixed to the front end of the wooden box, a spring disposed inside the movable pressure plate, and a fixing pin telescopically connected to the middle of the movable pressure plate, wherein a fixing ring is fixed to the front end of the fixing pin.

[0015] Preferably, the movable pressure plate flips upward and engages with the limiting block, and the movable pressure plate is fitted onto the box cover;

[0016] Meanwhile, a fixing column is provided through the middle of the movable pressure plate.

[0017] Preferably, the fixing pin abuts against the movable end of the spring, and the upper end of the fixing pin is inserted into the fixing post.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The stator bar withstand voltage test tin foil wrapping device has multiple tooling slots in the wooden box, which can accommodate and withstand multiple sets of stator bars at one time, eliminating the need to wrap each bar with tin foil individually as in the traditional method, saving tedious wrapping operations and adapting to the high-efficiency testing needs in mass production or maintenance scenarios; it uses 0.03mm copper foil as the conductive contact component, which has better structural stability than easily damaged tin foil, and the combination of the wooden box and sponge can make the copper foil adhere more evenly to the bar, avoiding poor contact problems caused by tin foil wrinkles and gaps in traditional wrapping, reducing safety hazards such as partial discharge, improving the safety factor and accuracy of the test process, and the copper foil can be reused with the tooling, which can reduce the cost of consumables compared to disposable tin foil;

[0019] 1. It is equipped with a wooden box, a lid and a locking mechanism. When using it, you only need to put the wire rod into the tooling slot in the wooden box, close the lid and lock it in place. The operation process is simple and easy to learn, and it is highly practical.

[0020] 2. Equipped with tooling slots, sponge and copper sheet. The wooden box has multiple tooling slots to suit mass production or maintenance scenarios. The copper sheet serves as a conductive contact component with high structural stability and can be reused. The sponge provides flexible support and buffer for the stator bars, preventing direct collision and friction between the bars and hard components during testing.

[0021] 3. It is equipped with a support assembly, including a fixed bracket, a support plate and a fixed rod. The support plate and the fixed rod together drive the wooden box to form a lifting structure at the upper end of the fixed bracket, which makes it easy to adjust the usage height of the wooden box, making it convenient for people of different heights to use. It is also easy to disassemble and assemble. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of this utility model viewed from below;

[0025] Figure 3 This is a schematic diagram of the exploded structure of this utility model viewed from below;

[0026] Figure 4 This is a schematic diagram of the flip-open structure of the box lid and wooden box of this utility model;

[0027] Figure 5 This utility model Figure 1Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is an exploded structural diagram of the movable pressure plate, fixed column and fixed pin of this utility model.

[0029] In the diagram: 1. Wooden box; 2. Box lid; 3. Fixed bracket; 4. Support plate; 5. Fixed rod; 6. Fixed bolt; 7. Rubber pad; 8. Mounting rod; 9. Mounting cap; 10. Movable pressure plate; 11. Limiting block; 12. Fixed column; 13. Spring; 14. Fixed pin; 15. Fixed ring; 16. Through hole. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-6 The present invention provides the following technical solution:

[0032] To address the significant shortcomings of existing technologies using traditional methods: firstly, tin foil is soft and easily damaged, requiring manual wrapping of each wire bar individually, a cumbersome and time-consuming process with extremely low testing efficiency, making it difficult to meet the timeliness requirements of mass production or maintenance; secondly, manually wrapped tin foil is prone to inconsistent adhesion and sealing, easily resulting in incomplete wrapping, local wrinkles, or gaps, leading to unstable conductive contact during testing. This not only affects the accuracy of withstand voltage test results but also poses safety hazards such as partial discharge caused by poor contact, resulting in a low safety factor. Therefore, this solution employs the following technical approach: A tin foil wrapping device for stator bar withstand voltage test includes a wooden box 1 and a cover 2 hinged to the upper end of the wooden box 1. The wooden box 1 has multiple tooling slots adapted to the stator bar, and the tooling slots are filled with 0.5mm sponge. At the same time, 0.03mm copper foil is glued to the sponge. The cover 2 is fixed by a locking piece set on the front side of the wooden box 1 after being flipped down. The support assembly includes fixed brackets 3 set on the left and right sides of the lower end of the wooden box 1, and a support plate 4 and a fixing rod 5 set on the upper end of the fixed brackets 3. The support plate 4 together with the fixing rod 5 drives the wooden box 1 to form a lifting structure on the upper end of the fixed brackets 3. At the same time, the wooden box 1 forms a disassembly structure on the upper end of the support plate 4.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, the fixed bracket 3 is placed on the ground, and the support plate 4 drives the fixed rod 5 to be inserted into the through hole 16 at the upper end of the fixed bracket 3. By pulling the support plate 4 up and down, the support plate 4 slides up and down in the through hole 16, thereby raising and lowering the support plate 4 and adjusting the height of the wooden box 1. After the height adjustment is completed, the fixed bracket 3 and the fixed rod 5 are limited by rotating the fixing bolt 6. The lower end of the wooden box 1 is fixed with the mounting rod 8. The wooden box 1 drives the mounting rod 8 through the rubber pad 7 and inserts it into the middle of the support plate 4. The wooden box 1 is fitted to the upper end of the rubber pad 7. Then, the mounting cap 9, which is threaded to the outer surface of the mounting rod 8, is rotated to fix the wooden box 1 to the upper end of the support plate 4, thus completing the assembly.

[0034] like Figure 4 , Figure 5 , Figure 6 As shown, the box cover 2 is flipped open, and then the 0.03mm copper foil, with its good conductivity, is glued to the surface of the 0.5mm sponge filled in the tooling slot. When the stator bar is placed in the tooling slot, the flexibility of the sponge allows the copper foil to fit tightly against the surface of the bar, replacing the conductive function of traditional tin foil and providing a stable conductive contact path for withstand voltage testing. Multiple tooling slots can accommodate multiple sets of stator bars at the same time, thus enabling withstand voltage testing of multiple bars at one time. The wooden box 1, as the outer structure, can isolate external interference and prevent personnel from directly contacting conductive parts during the testing process, improving operational safety. In addition to assisting the copper foil to fit the bar, the internal sponge can also form a flexible buffer for the hard bar, preventing the bar from being damaged by collision and friction during the testing process, while maintaining the stability of the contact between the bar and the copper foil, ensuring accurate test results.

[0035] The locking mechanism includes a movable pressure plate 10 rotatably connected to the front end of the wooden box 1, a limiting block 11 fixed to the upper end of the box cover 2, a fixing post 12 fixed to the front end of the wooden box 1, a spring 13 disposed inside the movable pressure plate 10, and a fixing pin 14 telescopically connected to the middle of the movable pressure plate 10. A fixing ring 15 is fixed to the front end of the fixing pin 14. When the box cover 2 is flipped downwards and placed on the upper end of the wooden box 1, the fixing pin 14 moves in a certain direction within the movable pressure plate 10 by pulling the fixing ring 15, thus compressing the spring 13. This causes the spring 13 to undergo elastic deformation, and then the movable pressure plate 10 flips upward. The upper end of the movable pressure plate 10 engages with the limiting block 11, and the movable pressure plate 10 is fitted against the upper end of the box cover 2. The fixing post 12 passes through the middle of the movable pressure plate 10, limiting the distance between the box cover 2 and the wooden box 1. At the same time, the fixing pin 14 is aligned with the fixing post 12, and the fixing ring 15 is released. At this time, the spring 13 returns to its elastic deformation, pushing the fixing pin 14 to insert into the middle of the fixing post 12, limiting the movable pressure plate 10, and completing the locking and limiting of the distance between the box cover 2 and the wooden box 1.

[0036] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tin foil wrapping device for a stator bar withstand voltage test, comprising a wooden box (1) and a box cover (2) hinged to the upper end of the wooden box (1); characterized in that Also includes: The wooden box (1) is provided with multiple tooling slots that are compatible with the stator bars. The tooling slots are filled with 0.5mm sponge, and 0.03mm copper foil is glued on the sponge. The box cover (2) is flipped down and fixed by a locking piece set on the front side of the wooden box (1). The support assembly includes fixed brackets (3) set on the left and right sides of the lower end of the wooden box (1) and a support plate (4) and a fixing rod (5) set on the upper end of the fixed brackets (3). The support plate (4) together with the fixing rod (5) drives the wooden box (1) to form a lifting structure on the upper end of the fixed bracket (3), while the wooden box (1) forms a disassembly structure on the upper end of the support plate (4).

2. The tin-foil paper winding device for stator bar voltage-withstanding test according to claim 1, characterized in that: The upper end of the fixed bracket (3) is provided with a through hole (16), and a fixed rod (5) is provided through the through hole (16). The fixed rod (5) is fixed to the lower end of the support plate (4).

3. The tin foil paper winding device for stator bar voltage-withstanding experiment according to claim 2, characterized in that: The fixing rod (5) forms an up-and-down sliding structure in the through hole (16), and the fixing rod (5) and the fixing bracket (3) are limited by a fixing bolt (6) that passes through the outer side of the upper end of the fixing bracket (3).

4. The tin foil paper winding device for stator bar voltage-withstanding experiment according to claim 2, characterized in that: The upper end of the support plate (4) is provided with a rubber pad (7), and the rubber pad (7) is attached to the lower end of the wooden box (1).

5. The tin-foil paper winding device for stator bar voltage-withstanding test according to claim 1, characterized in that: Mounting rods (8) are fixed on both the left and right sides of the lower end of the wooden box (1), and the mounting rods (8) pass through the rubber pads (7) and are inserted into the middle of the support plate (4). The outer surface of the mounting rods (8) is threaded with mounting caps (9), and the mounting caps (9) are fitted to the lower end of the support plate (4).

6. The tin-foil paper winding device for stator bar voltage-withstanding test according to claim 1, characterized in that: The locking components include a movable pressure plate (10) rotatably connected to the front end of the wooden box (1), a limiting block (11) fixed to the upper end of the box cover (2), a fixing post (12) fixed to the front end of the wooden box (1), a spring (13) disposed inside the movable pressure plate (10), and a fixing pin (14) telescopically connected to the middle part of the movable pressure plate (10). The front end of the fixing pin (14) is fixed with a fixing ring (15).

7. The tin-foil paper winding device for stator bar voltage-withstanding test according to claim 6, characterized in that: The movable pressure plate (10) flips upward and engages with the limiting block (11), and the movable pressure plate (10) is attached to the box cover (2); Meanwhile, a fixed column (12) is provided through the middle of the movable pressure plate (10).

8. The tin-foil paper winding device for stator bar voltage-withstanding test according to claim 6, characterized in that: The fixing pin (14) abuts against the movable end of the spring (13), and the upper end of the fixing pin (14) is inserted into the fixing post (12).

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