Capacitor sleeve surface defect detection device

Abstract

The utility model relates to the technical field of transformers, and particularly discloses a capacitor bushing surface defect detection device which comprises a synchronizing shaft, the two ends of the synchronizing shaft are symmetrically sleeved with supporting plates. A circular groove is formed in the supporting plate in a penetrating mode. An optical shaft and a threaded shaft are rotationally inserted into the circular groove; the clamping plates which are symmetrically arranged are slidably connected to the optical axis in a sleeving mode at the same time; the upper end of the threaded shaft is fixedly connected with a first motor, and the first motor is electrified to drive the threaded shaft to rotate forwards and backwards, so that the symmetrical clamping plates can be driven by the first motor to do symmetrical reciprocating motion, the two ends of the capacitive bushing can be well clamped, meanwhile, the capacitive bushings with different diameters can be clamped, and after the capacitive bushings are clamped, the clamping efficiency is improved. The axes of the capacitor bushings with different sizes can be positioned at the same height, so that the surface defect detection can be carried out on the capacitor bushings at the same height without changing the position of an external detection structure.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically a device for detecting surface defects in capacitor bushings. Background Technology

[0002] A capacitor bushing is a special electrical device mainly used to connect the leads of high-voltage equipment such as transformers and circuit breakers in power systems to external circuits. Its main function is to provide an insulating path so that the internal high-voltage conductors can safely pass through the supporting structure or wall and maintain insulation to ground.

[0003] Chinese invention patent CN107102245A, published on August 29, 2017, discloses a device and method for detecting transformer winding deformation and capacitive bushing faults. This device controls the opening and closing of a DC charging control switch and a detection control switch, and can measure the resonant wave, resonant wave time, and frequency characteristics of the transformer winding. By comparing the measured resonant wave with historical resonant waves, it determines whether the transformer winding is deformed. It also measures the partial discharge of the transformer capacitive bushing and estimates the capacitance and dielectric loss factor of the capacitive bushing based on the resonant wave time and frequency characteristics. Finally, it analyzes the partial discharge, capacitance, and dielectric loss factor to determine whether the capacitive bushing has defects. The device and method provided in this application can promptly detect transformer winding deformation and capacitive bushing faults, preventing sudden situations from affecting the safe operation of the transformer.

[0004] However, the above-mentioned disclosed solutions have the following shortcomings: the existing technology does not disclose a specific surface detection device, which makes it impossible to actually detect the surface of the capacitive bushing, and thus it is impossible to quickly monitor the surface of the capacitive bushing. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem that the existing technology does not disclose a specific surface inspection device, which makes it impossible to actually inspect the surface of capacitor bushings and thus impossible to quickly monitor the surface of capacitor bushings. The invention provides a surface defect detection device for capacitor bushings.

[0006] To achieve the above objectives, the present invention adopts the following technical solution;

[0007] The present invention discloses a capacitor bushing surface defect detection device, comprising a synchronous shaft; support plates are symmetrically sleeved at both ends of the synchronous shaft; a circular groove is formed through the support plate; an optical shaft and a threaded shaft are rotatably inserted into the circular groove; clamping plates are symmetrically threaded onto the threaded shaft; and a first motor is fixedly connected to the upper end of the threaded shaft.

[0008] Furthermore, an annular plate is rotatably inserted into the circular groove; an automatic detection unit is provided between the annular plates.

[0009] Furthermore, the automatic detection unit includes a support frame; the support frame is fixed between the annular plates; a screw is rotatably connected to the support frame; a slider is threaded onto the screw; and an optical camera and an insulating probe are detachably fixed to the slider.

[0010] The capacitor bushing surface defect detection device provided by this utility model has the following beneficial effects:

[0011] 1. This utility model uses symmetrically arranged clamping plates that slide simultaneously on the optical axis; a first motor is fixedly connected to the upper end of the threaded shaft. When the first motor is energized, it drives the threaded shaft to rotate in both directions, thereby driving the symmetrical clamping plates to reciprocate symmetrically. This allows for the clamping of both ends of the capacitor sleeve, and it can clamp capacitor sleeves of different diameters. After clamping the capacitor sleeves, the axes of capacitor sleeves of different sizes are all located at the same height, so there is no need to change the position of the external detection structure. Surface defect detection of the capacitor sleeve can be performed at a uniform height.

[0012] 2. This utility model allows the annular plate to rotate arbitrarily within a circular groove, enabling the automatic detection unit to rotate within the groove and thus achieve 360-degree surface defect detection around the outer surface of the capacitor bushing. An optical camera can be used to detect surface defects in the capacitor bushing, and an insulating probe can also be used to test the insulation performance of the capacitor bushing. Attached Figure Description

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings;

[0014] Figure 1 This is a schematic diagram of the first isometric structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the second isometric structure of this utility model;

[0016] Figure 3 This is a front view structural diagram of the present invention.

[0017] The following are the labels in the diagram: 1. Support plate; 2. Circular groove; 3. Optical axis; 4. Threaded shaft; 5. First motor; 6. Clamping plate; 7. Matching plate; 8. Ring plate; 9. Support frame; 10. Screw; 11. Slider; 12. Optical camera; 13. Insulating probe; 14. Synchronous shaft; 15. Second motor. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that all directional indications (such as up-down-left-right-forward-backward...) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0021] Please see Figure 1-3 As shown, a capacitor sleeve surface defect detection device includes a synchronous shaft 14; support plates 1 are symmetrically slidably sleeved at both ends of the synchronous shaft 14; a circular groove 2 is formed through the support plate 1, through which a capacitor sleeve can pass; an optical shaft 3 and a threaded shaft 4 are rotatably inserted into the circular groove 2; the outer surface of the threaded shaft 4 is symmetrically provided with external threads, and clamping plates 6 are symmetrically threaded on the threaded shaft 4, which are simultaneously slidably sleeved on the optical shaft 3; a first motor 5 is fixedly connected to the upper end of the threaded shaft 4, and the first motor 5 drives the threaded shaft 4 to rotate forward and backward, thereby driving the symmetrical clamping plates 6 to move symmetrically back and forth, thus clamping both ends of the capacitor sleeve. It can clamp capacitor sleeves of different diameters, and after clamping the capacitor sleeves, the axes of capacitor sleeves of different sizes are all at the same height, so that the position of the external detection structure does not need to be changed, and the surface defect detection of the capacitor sleeve can be performed at a uniform height.

[0022] An annular plate 8 is rotatably inserted into the circular groove 2; an automatic detection unit is provided between the annular plates 8. By allowing the annular plates 8 to rotate arbitrarily within the circular groove 2, the automatic detection unit can rotate within the circular groove 2, thereby realizing surface defect detection around the outer surface of the capacitor sleeve in 360 degrees.

[0023] The automatic detection unit includes a support frame 9; the support frame 9 is fixed between the annular plates 8; a screw 10 is rotatably connected to the support frame 9; a slider 11 is threaded onto the screw 10; an optical camera 12 and an insulating probe 13 are detachably fixed onto the slider 11. The optical camera 12 can be used to detect surface defects in the capacitor bushing, and the insulating probe 13 can be used to test the insulation performance of the capacitor bushing.

[0024] The screw 10 is connected to a second motor 15. The second motor 15 is fixed to the support frame 9. When the second motor 15 is energized and rotates, it can drive the screw 10 to reciprocate, thereby driving the slider 11, the optical camera 12 and the insulating probe 13 to move left and right. This realizes the automated detection of surface defects on the surface of the capacitor bushing without the need for manual intervention.

[0025] The screw 10 and the second motor 15 are connected by gear transmission. The gear transmission connection makes the rotation accuracy of the screw 10 high, so that the rotation angle of the screw 10 can be precisely controlled, thereby accurately controlling the left and right positions of the optical camera 12 and the insulating probe 13.

[0026] A matching plate 7 is detachably fixed inside the clamping plate 6, which can be used to fit capacitor sleeves with smaller diameters.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A device for detecting surface defects in capacitor bushings, characterized in that; It includes a synchronous shaft (14); support plates (1) are symmetrically sleeved at both ends of the synchronous shaft (14); a circular groove (2) is opened through the support plate (1); an optical shaft (3) and a threaded shaft (4) are rotatably inserted into the circular groove (2); a clamping plate (6) is symmetrically threaded on the threaded shaft (4); and a first motor (5) is fixedly connected to the upper end of the threaded shaft (4).

2. The capacitor bushing surface defect detection device according to claim 1, characterized in that: An annular plate (8) is rotatably inserted into the circular groove (2); an automatic detection unit is provided between the annular plates (8).

3. The capacitor bushing surface defect detection device according to claim 2, characterized in that: The automatic detection unit includes a support frame (9); the support frame (9) is fixed between the annular plates (8); a screw (10) is rotatably connected to the support frame (9); a slider (11) is threaded onto the screw (10); an optical camera (12) and an insulating probe (13) are detachably fixed onto the slider (11).

4. The capacitor bushing surface defect detection device according to claim 3, characterized in that: The screw (10) is connected to a second motor (15); the second motor (15) is fixed to the support frame (9).

5. The capacitor bushing surface defect detection device according to claim 4, characterized in that: The screw (10) and the second motor (15) are connected by gear transmission.

6. The capacitor bushing surface defect detection device according to claim 5, characterized in that: A matching plate (7) is detachably fixed inside the clamping plate (6).

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