Nondestructive testing device for enameled wire pinhole

Abstract

The utility model discloses an enameled wire pinhole nondestructive testing device which comprises a voltage withstanding instrument, detection lines are connected to positive and negative wiring terminals of the voltage withstanding instrument, the end part of the detection line on one side is connected with a wiring clamp, the other detection line is connected with a remote control high-voltage rod, and the end part of the other detection line is connected with a copper wire brush. The copper wire brush abuts against and sweeps the outer wall of the varnished wire, and the varnished wire is wound on the wrapping post. According to the utility model, the detection voltage of the voltage withstanding instrument is adjusted to DC 1500V, the paint film of the connector lug at the end part of the enameled wire is scraped, the exposed copper wire part of the connector lug is clamped by the jointing clamp extending out of the voltage withstanding instrument, and during measurement, the remote control high-voltage rod is close to the enameled wire, the switch on the remote control high-voltage rod is pressed, and the copper wire brush is used for brushing the outer surface of the enameled wire back and forth to measure pinholes on the surface of the enameled wire. When a pinhole appears, the withstand voltage tester gives an alarm, sparks and black spots appear at the pinhole, and the whole detection device is simple in structure, easy and convenient to operate and capable of performing field detection.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection devices, in particular to a non-destructive detection device for pinholes in enameled wires. Background Art

[0002] The number of pinholes in enameled wire is an important indicator of its performance and can cause burnout between turns of motor windings. Currently, the number of pinholes on the surface of an incoming reel of enameled wire can only be tested in the laboratory using a high-voltage paint film continuity tester. After testing, the enameled wire becomes unusable and suffers significant losses. Furthermore, the number of pinholes in the motor coil after winding cannot be detected. Utility Model Content

[0003] The present invention aims to solve the problems existing in the prior art and proposes the following technical solutions:

[0004] The nondestructive testing device for pinholes in enameled wires includes a withstand voltage tester, wherein the positive and negative terminals of the withstand voltage tester are connected to detection wires, the ends of the detection wires on one side are connected to a wiring clamp, the other end of the detection wires is connected to a remote-controlled high-voltage rod, and the other end of the detection wires is connected to a copper wire brush, which abuts and sweeps against the outer wall of the enameled wire, and the enameled wire is wound on a winding pole.

[0005] Adjust the voltage of the withstand voltage meter to DC1500V, scrape off the paint film on the end of the enameled wire terminal, and clamp the exposed copper wire part of the terminal with the terminal clamp extended by the withstand voltage meter. When measuring, the remote control high-voltage rod is close to the enameled wire, press the switch on the remote control high-voltage rod, and use a copper wire brush to brush back and forth on the outer surface of the enameled wire to measure the pinholes on the surface of the enameled wire. When pinholes appear, the withstand voltage meter will sound an alarm and spark black spots will appear at the pinholes. The entire detection device has a simple structure, easy operation and can be tested on site.

[0006] As a preferred embodiment of the above technical solution, the side wall of the wiring clamp is provided with a plug-in slot, and the inner wall of the plug-in slot is provided with a limiting slot, the inner wall of the limiting slot is installed with a sliding rod, the outer wall of the sliding rod is slidably connected to a slider, the two groups of sliders are connected by an elastic member, the middle part of the elastic member is surrounded by the outer wall of the sliding rod, the outer wall of the slider is connected with an inner splint, and the inner splint is clamped on the end of the enameled wire.

[0007] Insert the enameled wire into the insertion groove, and the sliding action of the slider and the slide rod cooperates with the elastic potential energy of the elastic part to drive the inner clamping plate to complete the clamping operation on the end of the enameled wire, thereby achieving the stability of the clamping.

[0008] As a preferred embodiment of the above technical solution, the inner clamping plate is in an open shape.

[0009] Under the effect of the open shape of the inner clamping plate, the guide enameled wire can be conveniently plugged into the inner side of the inner clamping plate, thereby achieving the stability and efficiency of the clamping operation by the end of the inner clamping plate.

[0010] The beneficial effects of the utility model are:

[0011] In this application, the voltage of the withstand voltage meter is adjusted to DC1500V, the paint film of the terminal head at the end of the enameled wire is scraped off, and the terminal clamp extended by the withstand voltage meter clamps the exposed copper wire part of the terminal head. During measurement, the remote-controlled high-voltage rod is close to the enameled wire, and the switch on the remote-controlled high-voltage rod is pressed. At the same time, a copper wire brush is brushed back and forth on the outer surface of the enameled wire to measure the pinholes on the surface of the enameled wire. When a pinhole appears, the withstand voltage meter will sound an alarm, and a spark black spot will appear at the pinhole. The entire detection device has a simple structure, is easy to operate, and can be tested on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The schematic diagram of the structure of the embodiment of the present invention in the front view state is shown;

[0013] Figure 2 The embodiment of the present invention provided by Figure 1 Enlarged structural diagram at point A in the middle.

[0014] Legend:

[0015] 1. Withstand voltage tester; 2. Remote control high voltage rod; 3. Wiring clamp; 4. Copper wire brush; 5. Winding column; 6. Enameled wire; 7. Inner splint; 8. Plug slot; 9. Slider; 10. Sliding rod; 11. Elastic part; 12. Limit slot. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0017] This application addresses the problem in the prior art that the enameled wire cannot be used after detection, has large losses, and the number of pinholes in the motor coil after winding cannot be detected. The detection voltage of the withstand voltage meter 1 is adjusted to DC1500V, the paint film of the terminal head at the end of the enameled wire 6 is scraped off, and the terminal clamp 3 extended by the withstand voltage meter 1 clamps the exposed copper wire part of the terminal head. During measurement, the remote-controlled high-voltage rod 2 is brought close to the enameled wire 6, the switch on the remote-controlled high-voltage rod 2 is pressed, and the copper wire brush 4 is used to brush back and forth on the outer surface of the enameled wire 6 to measure the pinholes on the surface of the enameled wire 6. When pinholes appear, the withstand voltage meter 1 will sound an alarm, and spark black spots will appear at the pinholes. The entire detection device has a simple structure, is easy to operate, and can be detected on site.

[0018] like Figure 1 and Figure 2As shown, in the embodiment of the present invention, the enameled wire pinhole nondestructive detection device includes a withstand voltage instrument 1, and the positive and negative terminals of the withstand voltage instrument 1 are connected to detection wires, the end of the detection wire on one side is connected to a wiring clamp 3, and the other detection wire is connected to a remote control high-voltage rod 2, and the other detection wire end is connected to a copper wire brush 4, which abuts and slightly sweeps the outer wall of the enameled wire 6, and the enameled wire 6 is wound on the winding column 5; the wiring clamp 3 clamps the exposed copper wire part of the end of the enameled wire 6, the remote control high-voltage rod 2 is close to the enameled wire, the switch on the remote control high-voltage rod 2 is pressed, and the copper wire brush 4 connected to the remote control high-voltage rod 2 is used to brush back and forth on the outer surface of the entire coil or the wound enameled wire 6. When a pinhole appears, the withstand voltage instrument 1 will issue an alarm, and a spark black spot will appear at the pinhole.

[0019] like Figure 1 and Figure 2 As shown, the side wall of the wiring clamp 3 is provided with an insertion groove 8, and the inner wall of the insertion groove 8 is provided with a limiting groove 12, and the inner wall of the limiting groove 12 is installed with a slide bar 10, and the outer wall of the slide bar 10 is slidably connected with a slider 9, and the two groups of sliders 9 are connected by an elastic member 11. The middle part of the elastic member 11 surrounds the outer wall of the slide bar 10, and the outer wall of the slider 9 is connected with an inner plywood 7, and the inner plywood 7 is clamped at the end of the enameled wire 6; the enameled wire 6 is inserted into the insertion groove 8, and the sliding action of the slider 9 and the slide bar 10 cooperates with the elastic potential energy of the elastic member 11 to drive the inner plywood 7 to complete the clamping operation on the end of the enameled wire 6, thereby completing the clamping stability; the inner plywood 7 is in an open shape; under the action of the open shape of the inner plywood 7, the guide enameled wire 6 is conveniently inserted into the inner side of the inner plywood 7, completing the stability and efficiency of the clamping operation by the end of the inner plywood 7.

[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A nondestructive testing device for pinholes in enameled wire, comprising a pressure tester (1), characterized in that: The positive and negative terminals of the voltage tester (1) are connected to detection wires, one end of the detection wire is connected to a wiring clamp (3), the other end of the detection wire is connected to a remote control high-voltage rod (2), and the other end of the detection wire is connected to a copper wire brush (4), the copper wire brush (4) abuts and sweeps against the outer wall of the enameled wire (6), and the enameled wire (6) is wound on a winding pole (5).

2. The nondestructive testing device for pinholes in enameled wire according to claim 1, characterized in that: The side wall of the wiring clamp (3) is provided with a plug-in slot (8), and the inner wall of the plug-in slot (8) is provided with a limit slot (12), the inner wall of the limit slot (12) is installed with a slide bar (10), the outer wall of the slide bar (10) is slidably connected with a slider (9), the two groups of the sliders (9) are connected by an elastic member (11), the middle part of the elastic member (11) surrounds the outer wall of the slide bar (10), the outer wall of the slider (9) is connected with an inner clamping plate (7), and the inner clamping plate (7) is clamped on the end of the enameled wire (6).

3. The nondestructive testing device for pinholes in enameled wire according to claim 2, characterized in that: The inner clamping plate (7) is in an open shape.

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