High-voltage motor coil withstand voltage test bench

Abstract

The utility model relates to the technical field of motor maintenance, in particular to a high-voltage motor coil withstand voltage test bench, which comprises an insulation bench and a test seat arranged on the insulation bench, the test seat is provided with a test groove used for accommodating a coil, the inner wall of the test groove is provided with a conductive sleeve, the conductive sleeve is connected with a grounding wire, and the grounding wire is connected with the insulation bench. And a high-voltage connector lug is arranged on the insulating table. The high-voltage motor coil withstand voltage test bench is provided with the insulation bench, so that high voltage is prevented from being directly transmitted to the ground through the insulation bench in the test process, and the safety of the test ground is ensured. The test groove is designed on the test seat, and the position of the coil is accommodated and limited by the test groove, so that an insulating layer on the surface of the coil can be prevented from being damaged due to slippage in the test process. In addition, due to the design of the conductive sleeve, large current in the coil can be prevented from being directly transmitted to the grounding wire through the conductive sleeve after the insulating layer of the coil is broken down, and the safety of the whole coil and a test place is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motor maintenance, and particularly relates to a withstand voltage test bench for high-voltage motor coils. Background Technique

[0002] During the long-term operation of high-voltage motors, the insulating layer on the surface of the coil is prone to breakdown, resulting in the motor being burned out. Due to the large size of high-voltage motors and the high replacement cost, the coils are generally repaired and replaced. When replacing the coils of high-voltage motors, the coils need to be subjected to a withstand voltage test in advance, which can ensure the safety of the replaced coils and the reliability of high-voltage motors.

[0003] At present, the withstand voltage test of large coils needs to be carried out on specific withstand voltage test sites. Generally, only high-voltage test equipment is directly connected to the coil to be tested for the test. The coil to be tested is simply placed on the withstand voltage test bench, which is likely to damage the insulating layer on the surface of the coil during the test and the connection wiring process. In view of this situation, some manufacturers have designed some special withstand voltage test platforms. For example, in the patent CN212749128 U - a withstand voltage test platform with safety performance, this patent uses an insulating platform as the insulating base layer, and through the grounding treatment of the test equipment and insulators, the coil grounding discharge measure is completed after the test to improve the safety of the test; a workbench is used to hold and fix the coil to be tested to avoid the coil sliding during the detection process. However, a positioning structure is designed on the workbench to carry and limit the coil, but its specific structure is not disclosed, and those skilled in the art cannot know its structure. Therefore, the problem of avoiding the sliding of the coil to be tested and damaging the insulating layer during the test still cannot be solved. Content of the Utility Model

[0004] In order to overcome one of the deficiencies of the prior art, the purpose of the utility model is to provide a withstand voltage test bench for high-voltage motor coils, which can effectively fix the coil during the withstand voltage test, avoid slipping, and protect the coil.

[0005] To solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A withstand voltage test bench for high-voltage motor coils includes an insulating table and a test seat installed on the insulating table. A test groove for accommodating the coil is provided on the test seat. A conductive sleeve is provided on the inner wall of the test groove, and the conductive sleeve is connected with a grounding wire. A high-voltage connection head is provided on the insulating table.

[0007] Furthermore, a plurality of detachable isolation gaskets are provided on one side of the test groove, and the isolation gaskets are used to press the coil tightly in the test groove.

[0008] Furthermore, the edges of the test trough are all provided with chamfers.

[0009] Furthermore, the test seat is provided with a terminal post, and the grounding wire is also connected to the terminal post.

[0010] Furthermore, a plurality of support blocks are provided on the bottom of the test seat, and the support blocks are placed on an insulating platform.

[0011] Furthermore, the insulating platform includes a movable frame, a tabletop arranged on the movable frame, and an isolation pad plate arranged on the tabletop, the isolation pad plate is provided with an insulation layer plate, the test seat is provided on the insulation layer plate, and the high-voltage terminal is provided on the insulation layer plate.

[0012] Furthermore, a plurality of casters with brakes are provided at the bottom of the mobile frame.

[0013] Furthermore, a fixing support is provided on one side of the insulating layer plate, and the high-voltage terminal is installed on the fixing support.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model is a high-voltage motor coil withstand voltage test bench designed with an insulating table to prevent high voltage electricity from being directly transmitted to the ground through the insulating table during the test, thereby ensuring the safety of the test ground. A test slot is designed on the test seat to accommodate and limit the position of the coil, thereby preventing the insulation layer on the coil surface from being damaged due to slippage during the test. In addition, the design of the conductive sleeve can prevent the high current in the coil from being directly transmitted to the ground wire through the conductive sleeve after the insulation layer of the coil is broken down, thereby ensuring the safety of the entire coil and the test site.

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0018] Figure 2 It is a partial structural diagram of an embodiment of the utility model;

[0019] Figure 3 It is a cross-sectional view of the test seat in the embodiment of the present utility model.

[0020] Description of Figure Numbers:

[0021] Insulating table 10, high-voltage terminal 11, moving frame 12, tabletop 13, isolation cushion plate 14, insulating layer board 15, fixed support 16, test seat 20, test slot 21, conductive sleeve 22, isolation gasket 23, terminal 24, support block 25, grounding wire 30. Detailed implementation manner

[0022] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] Refer to Figures 1 to 3 A high-voltage motor coil withstand voltage test bench as shown, includes an insulating table 10 and a test seat 20 installed on the insulating table 10. A test slot 21 for accommodating the coil is provided on the test seat 20. A conductive sleeve 22 is provided on the inner wall of the test slot 21. The conductive sleeve 22 is connected to a grounding wire 30. A high-voltage terminal 11 is provided on the insulating table 10.

[0024] Among them, in this application, two high-voltage terminals 11 are provided, which are directly connected to the input and output ends of the external test equipment respectively. Such a design is beneficial to stably connect the high-voltage terminal 11 and the external test equipment, and is also beneficial to adjust the connection between the coil to be tested and the input and output ends of the external test equipment according to the actual situation on site. In addition, the test seat 20 can be made of metal material or plastic. If it is made of metal material, the grounding wire 30 also needs to be connected to the test seat 20. At the same time, the main purpose of designing the conductive sleeve 22 is to accelerate the flow of current and avoid the generation of eddy current and overheating due to the accumulation of current on the test seat 20. Therefore, in this application, the conductive sleeve 22 can be a copper sleeve structure, or other structures that are easy to conduct electricity or structures containing conductive solutions. In this application, since different coils have different lengths, the two ends of the test slot 21 in this application are designed to be open. In one embodiment, in order to facilitate the grounding of the test seat 20, a terminal 24 is provided on the test seat 20, and the grounding wire 30 is also connected to the terminal 24.

[0025] Further, in the actual use process, since the internal coil sizes of high-voltage motors of different specifications are necessarily different, in order to adapt to coils of different types, specifications and sizes for experiments, in an embodiment of the present application, a number of detachable isolation gaskets 23 are provided on one side of the test slot 21, and the isolation gaskets 23 are used to press the coil tightly in the test slot 21. In order to limit the movement of the coil in the test slot 21, during installation, the coil can be pressed tightly against the other side of the test slot 21 through the isolation gasket 23. The main purpose of this is to enable the other side of the coil under test to be in direct contact with the conductive sleeve 22, so as to prevent current from being grounded in time when the coil is punctured and ensure the safety of the entire device.

[0026] Further, in order to avoid the edges of the test slot 21 scraping and damaging the insulating layer coated on the coil during the disassembly and assembly process, in an embodiment, chamfers are provided on the edges of the test slot 21.

[0027] Further, in order to support the test base 20 and at the same time prevent the coil fixed thereon from directly contacting the insulating table 10 and avoiding it from puncturing the insulating table 10, in an embodiment, a number of support blocks 25 are provided on the bottom of the test base 20, and the support blocks 25 are placed on the insulating table 10. The main function of the support blocks 25 is to raise the position of the test slot 21. At the same time, in an improved embodiment, the support blocks 25 can also support the test base 20 to prevent the test base 20 from tipping over after the coil is placed.

[0028] See Figures 1 to 2 , in an embodiment of the present application, in order to facilitate improvement of protection, the insulating table 10 includes a moving frame 12, a table top 13 provided on the moving frame 12, and an isolation cushion plate 14 provided on the table top 13. An insulating layer plate 15 is provided on the isolation cushion plate 14. The test base 20 is provided on the insulating layer plate 15, and the high-voltage connection head 11 is provided on the insulating layer plate 15. Among them, the isolation cushion plate 14 is a conventional conductive layer, which is grounded to prevent the current on the coil from puncturing the insulating layer plate 15 and improve safety.

[0029] Further, in the above embodiment, in order to facilitate movement, a number of braking foot wheels are provided at the bottom of the moving frame 12.

[0030] In the above improved embodiment, in order to fix the high-voltage connection head 11, a fixed support 16 is provided on one side of the insulating layer plate 15, and the high-voltage connection head 11 is installed on the fixed support 16. In fact, the back of the fixed support 16 is connected to an external test device through a high-voltage wire.

[0031] The high-voltage motor coil withstand voltage test bench is designed with an insulating platform 10 to prevent high voltage electricity from being directly transmitted to the ground through the insulating platform 10 during the test, thereby ensuring the safety of the test ground. A test slot 21 is designed on the test seat 20. The test slot 21 is used to accommodate and limit the position of the coil, thereby preventing the insulation layer on the coil surface from being damaged due to slippage during the test. In addition, the design of the conductive sleeve 22 can prevent the large current in the coil from being directly transmitted to the ground wire 30 through the conductive sleeve 22 after the insulation layer of the coil is broken down, thereby ensuring the safety of the entire coil and the test site.

[0032] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A high voltage motor coil withstand voltage test bench, characterized in that: It includes an insulating platform and a test seat installed on the insulating platform. The test seat is provided with a test slot for accommodating the coil. The inner wall of the test slot is provided with a conductive sleeve connected to a grounding wire. The insulating platform is provided with a high-voltage terminal.

2. The high-voltage motor coil withstand voltage test bench according to claim 1, characterized in that: A plurality of detachable isolation gaskets are provided on one side of the test tank, and the isolation gaskets are used to press the coil tightly into the test tank.

3. The high-voltage motor coil withstand voltage test bench according to claim 1, characterized in that: The edges of the test grooves are all provided with chamfers.

4. The high-voltage motor coil withstand voltage test bench according to claim 1, characterized in that: The test seat is provided with a terminal post, and the grounding wire is also connected to the terminal post.

5. The high-voltage motor coil withstand voltage test bench according to claim 2, characterized in that: A plurality of support blocks are provided on the bottom of the test seat, and the support blocks are placed on an insulating platform.

6. A high-voltage motor coil withstand voltage test bench according to any one of claims 1 to 5, characterized in that: The insulating platform includes a movable frame, a tabletop arranged on the movable frame, and an isolation pad plate arranged on the tabletop. The isolation pad plate is provided with an insulation layer plate, the test seat is provided on the insulation layer plate, and the high-voltage terminal is provided on the insulation layer plate.

7. The high-voltage motor coil withstand voltage test bench according to claim 6, characterized in that: The bottom of the mobile frame is provided with a plurality of casters with brakes.

8. The high-voltage motor coil withstand voltage test bench according to claim 6, characterized in that: A fixing support is provided on one side of the insulating layer plate, and the high-voltage terminal is installed on the fixing support.

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