Transformer withstand voltage test fixture

Abstract

The utility model discloses a transformer withstand voltage test fixture, which relates to the technical field of transformer test, and comprises a test board and a fixing device, a withstand voltage tester is arranged in the test board, the fixing device comprises a bottom table and limiting plates positioned on two sides of the bottom table, the limiting plates are hinged with the bottom table, and the limiting plates are arranged on the bottom table. The test bench is provided with a mounting groove matched with the size of the bottom surface of the bottom table, the fixing device is clamped with the test bench through the mounting groove, and a transformer is located on the bottom table and limited through the limiting plate and the mounting groove; a mounting groove is formed in the bottom table, the voltage withstanding tester is located below the mounting groove, the voltage withstanding tester is provided with a contact pin, the contact pin extends out of the mounting groove, a matched jack is formed in the position, corresponding to the contact pin, of the bottom table, and the contact pin penetrates through the jack to be electrically connected with the transformer. The transformer can be quickly fixed, and the test effect is ensured; meanwhile, transformers can be tested in batches, and testing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer testing, in particular to a withstand voltage testing fixture for a transformer. Background Technique

[0002] Before leaving the factory, a transformer needs to be subjected to a withstand voltage test to test whether the winding is leaking electricity. The existing withstand voltage testing fixtures for transformers usually use probes or metal sheets to contact the pins of the transformer, so as to electrically connect the transformer with a withstand voltage tester, apply a high voltage to the transformer to be tested, and test the withstand voltage performance of the transformer by testing the leakage current. However, the existing fixtures are single, and products need to be taken and placed one by one, resulting in low testing efficiency.

[0003] Chinese Patent No. CN220271399U discloses a withstand voltage testing fixture for a small transformer. Its scheme includes a base, a feeding chute arranged on the base, a turnover strip adapted to the feeding chute, testing plates arranged on both sides of the feeding chute, a first probe and a second probe respectively arranged on the two testing plates. When testing according to its scheme, the turnover strip is used for turnover. The operator can prepare for the next round of testing without waiting for the test. After the machine test is completed, the fixture is automatically loosened, and the product on the spare turnover strip is inserted into the feeding chute, and the pneumatic device is started for testing.

[0004] However, the above scheme still has certain deficiencies: it is necessary to drive the first probe and the second probe to perform tests respectively through a first air cylinder and a second air cylinder, and the testing process is relatively troublesome; at the same time, its scheme also needs to drive a lower pressing plate through a lower pressing air cylinder to press the transformer, and the testing steps are relatively cumbersome, and the testing efficiency is limited.

[0005] Therefore, a withstand voltage testing fixture for a transformer is needed, which can be conveniently clamped after placing the transformer, and can perform batch testing to improve the testing efficiency. Content of the Utility Model

[0006] The purpose of the utility model is to provide a withstand voltage testing fixture for a transformer to solve the problems existing in the background technique.

[0007] The purpose of the utility model is realized through the following technical solutions:

[0008] A withstand voltage testing fixture for a transformer includes a testing table and a fixing device. A withstand voltage tester is arranged in the testing table. The fixing device includes a bottom table and limiting plates located on both sides of the bottom table. The limiting plates are hinged to the bottom table. The testing table is provided with an installation groove adapted to the bottom surface size of the bottom table. The fixing device is clamped with the testing table through the installation groove. The transformer is located on the bottom table and is limited by the limiting plates and the installation groove;

[0009] The withstand voltage tester is located below the installation groove. The withstand voltage tester is provided with a pin, and the pin extends out of the installation groove. A jack matching the pin is provided at the corresponding position of the base, and the pin passes through the jack and is electrically connected to the transformer.

[0010] Further, a plurality of card slots are arranged in an array on the base. The size of the card slots is adapted to the bottom size of the transformer. The two sides of the transformer are provided with pins, and the jacks are located below the pins.

[0011] Further, the limiting plate is of an L-shaped structure. The limiting plate includes a side plate and a cross plate. When the side plate is in a vertical state, it is flush with the outer side of the base. When the side plate is perpendicular, the cross plate is located above the transformer.

[0012] Further, a hemispherical chuck is provided on one side of the cross plate close to the transformer. When the side plate is perpendicular, the chuck abuts against the upper part of the transformer.

[0013] Further, the depth of the installation groove is greater than the height of the base and less than the height of the fixing device when the side plate is perpendicular.

[0014] Further, baffles are provided on both sides of the base perpendicular to the direction of the two limiting plates. The height of the baffles is the same as the height when the side plate is perpendicular. A first bayonet is provided on the outer side of the baffle, and the first bayonet is higher than the installation groove.

[0015] Further, second bayonets are provided on the outer sides of the two side plates, and the second bayonets are located above the installation groove.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1) The transformer can be quickly fixed, the testing efficiency is improved, and the testing effect is guaranteed. Through the combined action of the installation groove and the limiting plate, the transformer is limited in the vertical direction, and at the same time, the transformer is limited in the horizontal direction through the card slots, improving the overall stability of the transformer testing.

[0018] 2) The transformers can be tested in batches, improving the testing efficiency. By arranging a plurality of card slots on the base, the transformers can be placed in the card slots to complete the limiting, facilitating the clamping connection between the transformers and the base without falling off, and facilitating the subsequent placement of the entire base and multiple transformers into the installation groove for testing. Description of the Drawings

[0019] Figure 1 It is an installation schematic diagram of a transformer withstand voltage testing fixture of the present utility model;

[0020] Figure 2 It is an unfolded schematic diagram of the fixing device in the present utility model;

[0021] Figure 3 This is the top view of the fixing device in the present utility model;

[0022] Figure 4 This is the top view of the test bench in the present utility model;

[0023] In the figure, 1 - test bench, 11 - withstand voltage tester, 12 - pin, 13 - mounting groove, 2 - fixing device, 21 - limiting plate, 22 - base, 23 - cross plate, 24 - side plate, 25 - second bayonet, 26 - chuck, 27 - baffle, 28 - first bayonet, 29 - jack, 210 - card slot, 3 - transformer, 31 - pin. Specific embodiments

[0024] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0025] Embodiment 1

[0026] As Figures 1-4 shown, place the transformer 3 on the base 22, with the limiting plates 21 on both sides of the transformer 3. Then, place the jack 29 on the base 22 at the position corresponding to the pin 12 into the mounting groove 13. At this time, the limiting plate 21 will be resisted by the mounting groove 13 and rotate towards the transformer 3 until the base 22 is completely placed into the mounting groove 13. At this time, the limiting plate 21 is in a vertical state, and the transformer 3 is fixed and limited by the limiting plate 21. At the same time, the pin 12 passes through the jack 29 and just abuts against the transformer 3 to complete the electrical connection. Furthermore, the withstand voltage tester 11 provided below the mounting groove 13 is used to test the transformer 3.

[0027] Furthermore, by providing a plurality of card slots 210 on the base 22, the transformer 3 can be placed in the card slots 210 to complete the limitation, which is convenient for the transformer 3 to be clamped with the base 22 without falling off, and is convenient for the subsequent placement of the entire base 22 and a plurality of transformers 3 into the mounting groove 13 for testing, and the transformers 3 can be tested in batches, improving the test efficiency.

[0028] Furthermore, since the side plate 24 is flush with the outside of the base 22 in the vertical state, it is convenient to place the base 22 into the installation groove 13. When the side plate 24 is in the vertical state, it will drive the cross plate 23 to move above the transformer 3. At the same time, the cross plate 23 drives the chuck 26 to tightly press against the upper part of the transformer 3. The common action of the installation groove 13 and the limiting plate 21 ensures the vertical direction limitation of the transformer 3, and at the same time, the transformer 3 is limited in the horizontal direction through the card slot 210, improving the overall stability of the transformer 3 test.

[0029] Embodiment 2

[0030] As Figure 2 and Figure 3 shown, when the base 22 is not placed in the installation groove 13, at this time the limiting plate 21 expands to both sides, which is convenient to place the transformer 3 into the card slot 210. After the transformers 3 are all placed in a row of card slots 210, the second bayonet 25 on the side plate 24 can be used as an embedded handle to transport the fixing device 2. It is convenient to place the base 22 and part of the limiting plate 21 into the installation groove 13 by lifting the second bayonets 25 on both sides.

[0031] After the transformer 3 test is completed, the first bayonet 28 on the baffle 27 is used as an embedded handle to transport the fixing device 2, which is convenient to lift the base 22 out of the installation groove 13. The first bayonet 28 and the second bayonet 25 facilitate the transportation of the fixing device 2, realizing the rapid installation of the fixing device 2 and the test bench 1.

[0032] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be within the protection scope of the appended claims of the present invention.

Claims

1. A transformer withstand voltage test fixture, characterized in that: The invention comprises a test bench (1) and a fixing device (2), wherein a withstand voltage tester (11) is provided in the test bench (1), the fixing device (2) comprises a base (22) and limit plates (21) located on both sides of the base (22), the limit plates (21) being hinged to the base (22), the test bench (1) being provided with a mounting groove (13) matching the bottom surface size of the base (22), the fixing device (2) being clamped to the test bench (1) via the mounting groove (13), and the transformer (3) being located on the base (22) and limited by the limit plates (21) and the mounting groove (13); The withstand voltage tester (11) is located below the mounting groove (13). The withstand voltage tester (11) is provided with a plug pin (12). The plug pin (12) extends out of the mounting groove (13). The base (22) is provided with a matching plug hole (29) at a position corresponding to the plug pin (12). The plug pin (12) passes through the plug hole (29) to be electrically connected to the transformer (3).

2. The transformer (3) withstand voltage test fixture according to claim 1, characterized in that: A plurality of slots (210) are arranged in an array on the base (22); the size of the slots (210) matches the size of the bottom of the transformer (3); pins (31) are provided on both sides of the transformer (3); and the jacks (29) are located below the pins (31).

3. The transformer (3) withstand voltage test fixture according to claim 1, characterized in that: The limiting plate (21) is an L-shaped structure, comprising a side plate (24) and a transverse plate (23), wherein the side plate (24) is flush with the outer side of the base (22) when in a vertical state, and the transverse plate (23) is located above the transformer (3) when the side plate (24) is vertical.

4. The transformer (3) withstand voltage test fixture according to claim 3, characterized in that: A hemispherical clamp (26) is provided on one side of the transverse plate (23) close to the transformer (3); when the side plate (24) is vertical, the clamp (26) abuts against the top of the transformer (3).

5. The transformer (3) withstand voltage test fixture according to claim 1, characterized in that: The depth of the installation groove (13) is greater than the height of the base (22) and less than the height of the fixing device (2) when the side plate (24) is vertical.

6. The transformer (3) withstand voltage test fixture according to claim 3, characterized in that: Baffles (27) are provided on both sides of the base (22) perpendicular to the two limit plates (21); the height of the baffles (27) is the same as the height of the side plates (24) when they are perpendicular; a first bayonet (28) is provided on the outer side of the baffle (27); the first bayonet (28) is higher than the mounting groove (13).

7. The transformer (3) withstand voltage test fixture according to claim 3, characterized in that: A second bayonet (25) is provided on the outer sides of the two side plates (24), and the second bayonet (25) is located above the mounting groove (13).

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