Distribution network overhead line insulation defect live detection and positioning instrument

Abstract

The utility model discloses a distribution network overhead line insulation defect live detection and positioning instrument comprising an operation assembly, the top of which is provided with a detection assembly. The detection assembly comprises a supporting plate, a driving box, a connecting plate, a fixing bolt, a first motor, a rotary table, a lug seat, a second motor, a detector main body, a signal transmitter, an infrared imager, an ultrasonic receiver and an electromagnetic wave receiver. According to the utility model, the electromagnetic wave receiver and the ultrasonic receiver are used for detecting electromagnetic waves and ultrasonic waves generated during partial discharge and judging the approximate position of the defect, the two receivers are combined for use, so that missed judgment or misjudgment is avoided, and when the cable is found to have the partial insulation defect, the unmanned aerial vehicle is used for carrying the detection assembly to approach the approximate position of the defect of the cable; the area is scanned through the infrared imager, the specific position of the defect is found, the positioning precision is improved, and then the maintenance efficiency of the distribution network overhead line is improved.

Description

Technical field:

[0001] The utility model relates to a locator, in particular to a live detection and locator for insulation defects of a distribution network overhead line, belonging to the technical field of distribution network overhead line detection. Background technology:

[0002] Overhead distribution lines are critical power distribution facilities in the power system. Cables are suspended overhead via poles, transmitting electricity directly from substations or power stations to end users. In complex and volatile operating environments, cables gradually accumulate various potential hazards over time. Partial discharge (PD) is a common early sign of failure in in-service cables. This is particularly true in high-voltage power cables. Due to large fluctuations in ambient temperature and humidity, rising temperatures accelerate the aging process of the insulation material, reducing its electrical resistance. Increased humidity can cause the insulation layer to absorb water and swell, and even trigger water treeing. This occurs when moisture, under the influence of an electric field, grows along microscopic channels within the insulation layer, forming root-like branching structures that severely damage the cable's insulation performance. Coupled with the long-distance transmission of high-voltage power cables, problems such as insulation damage at the cable head shield and internal shield fractures are common.

[0003] The existing live detection of insulation defects in distribution network overhead lines requires the use of ultrasonic detection devices. However, during the detection process, the ultrasonic detection device is difficult to get close to the defect location. When the detection device is carried by a drone, the noise generated by the drone itself will affect the ultrasonic detection, resulting in a decrease in the positioning accuracy during the detection. Therefore, a live detection and positioning instrument for insulation defects in distribution network overhead lines is proposed. Utility model content:

[0004] The purpose of the utility model is to provide a live detection and locating instrument for insulation defects in overhead lines of a distribution network, so as to solve one of the problems raised in the above-mentioned background technology.

[0005] The utility model is implemented by the following technical solutions: a live detection and locating instrument for insulation defects in distribution network overhead lines, comprising an operating assembly, a detection assembly being arranged on the top of the operating assembly, the detection assembly comprising a support plate, a drive box, a connecting plate, fixing bolts, a first motor, a turntable, an ear seat, a second motor, a detector body, a signal transmitter, an infrared imager, an ultrasonic receiver, and an electromagnetic wave receiver;

[0006] The bottom of the support plate is fixedly connected to a drive box, the outer side wall of the drive box is evenly fixedly connected to a connecting plate, the internal thread of the connecting plate is connected to a fixing bolt, a first motor is installed inside the drive box, the top of the support plate is rotatably connected to a turntable, the output shaft of the first motor is fixedly connected to the turntable, the top of the turntable is fixedly connected to an ear seat, a second motor is installed on one side of the ear seat, the inside of the ear seat is rotatably connected to a detector body, the output shaft of the second motor is fixedly connected to the detector body, a signal transmitter is installed on one side of the detector body, and an infrared imager, an ultrasonic receiver and an electromagnetic wave receiver are installed on the top of the detector body.

[0007] As a further preferred embodiment of the present technical solution: the operating assembly includes a base and a support rod, and the top of the base is fixedly connected to the support rod.

[0008] As a further preferred embodiment of the present technical solution: the outer side wall of the support rod is fixedly connected with a mounting seat.

[0009] As a further preferred embodiment of the present technical solution: a controller is installed on the inner side wall of the mounting seat, and a signal receiver is installed on the rear surface of the controller.

[0010] As a further preferred embodiment of the present technical solution: the signal output ends of the infrared imager, ultrasonic receiver and electromagnetic wave receiver are signal-connected to the signal input end of the signal transmitter.

[0011] As a further preferred embodiment of the present technical solution: the signal output end of the signal transmitter is signal-connected to the signal input end of the signal receiver, and the signal output end of the signal receiver is signal-connected to the signal input end of the controller.

[0012] As a further preferred embodiment of the present technical solution: an alarm light is installed on the top of the controller, and the controller is electrically connected to the alarm light.

[0013] As a further preferred embodiment of the present technical solution: a GPS locator is installed on the top of the controller, and the controller is connected to the GPS locator signal.

[0014] Advantages of the present invention: The present invention detects electromagnetic waves and ultrasonic waves generated during partial discharge through electromagnetic wave receivers and ultrasonic wave receivers, and determines the approximate location of the defect. The two receivers are used in combination to avoid missed judgment or misjudgment. When a local insulation defect is found in the cable, a drone equipped with a detection component is used to approach the approximate location of the cable defect, and an infrared imager is used to scan the area to find the specific location of the defect, thereby improving positioning accuracy and thereby improving the maintenance efficiency of the distribution network overhead lines. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a rear view structural diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the support plate structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the main structure of the detector of the present utility model.

[0020] In the figure: 10. Operating assembly; 11. Base; 12. Support rod; 13. Mounting base; 14. Controller; 15. Signal receiver; 16. Alarm light; 17. GPS locator; 20. Detection assembly; 21. Support plate; 22. Drive box; 23. Connecting plate; 24. Fixing bolt; 25. First motor; 26. Turntable; 27. Ear seat; 28. Second motor; 29. ​​Detector body; 210. Signal transmitter; 211. Infrared imager; 212. Ultrasonic receiver; 213. Electromagnetic wave receiver. Specific implementation method:

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example

[0023] See also Figure 1-4 The utility model provides a technical solution: a live detection and locating instrument for insulation defects in overhead power distribution networks, comprising an operating assembly 10, a detection assembly 20 being provided on top of the operating assembly 10, the detection assembly 20 comprising a support plate 21, a drive box 22, a connecting plate 23, a fixing bolt 24, a first motor 25, a rotating table 26, an ear seat 27, a second motor 28, a detector body 29, a signal transmitter 210, an infrared imager 211, an ultrasonic receiver 212, and an electromagnetic wave receiver 213;

[0024] The bottom of the support plate 21 is fixedly connected to the drive box 22, and the outer side wall of the drive box 22 is evenly fixedly connected to the connecting plate 23. The internal thread of the connecting plate 23 is connected to the fixing bolt 24. The inside of the drive box 22 is installed with a first motor 25. The top of the support plate 21 is rotatably connected to the turntable 26. The output shaft of the first motor 25 is fixedly connected to the turntable 26. The top of the turntable 26 is fixedly connected to the ear seat 27. A second motor 28 is installed on one side of the ear seat 27. The inside of the ear seat 27 is rotatably connected to the detector body 29. The output shaft of the second motor 28 is fixedly connected to the detector body 29. A signal transmitter 210 is installed on one side of the detector body 29. The top of the detector body 29 is installed with an infrared imager 211, an ultrasonic receiver 212 and an electromagnetic wave receiver 213.

[0025] In this embodiment, specifically: the operating assembly 10 includes a base 11 and a support rod 12. The top of the base 11 is fixedly connected to the support rod 12, and the length of the support rod 12 can be adjusted as needed.

[0026] In this embodiment, specifically: the outer side wall of the support rod 12 is fixedly connected with the mounting seat 13 .

[0027] In this embodiment, specifically: a controller 14 is installed on the inner side wall of the mounting seat 13 , and a signal receiver 15 is installed on the rear surface of the controller 14 . The controller 14 is used to control the operation of the detection and positioning device.

[0028] In this embodiment, specifically: the signal output ends of the infrared imager 211, the ultrasonic receiver 212 and the electromagnetic wave receiver 213 are signal-connected to the signal input end of the signal transmitter 210, the electromagnetic wave and ultrasonic wave generated during partial discharge are detected by the electromagnetic wave receiver 213 and the ultrasonic receiver 212, and the defect area is scanned by the infrared imager 211.

[0029] In this embodiment, specifically: the signal output end of the signal transmitter 210 is signal-connected to the signal input end of the signal receiver 15, and the signal output end of the signal receiver 15 is signal-connected to the signal input end of the controller 14. The signal transmitter 210 sends the collected signal to the signal receiver 15, and the signal receiver 15 then feeds back the signal to the controller 14 for the user to observe.

[0030] In this embodiment, specifically: an alarm light 16 is installed on the top of the controller 14 , and the controller 14 is electrically connected to the alarm light 16 . When one of the electromagnetic wave receiver 213 or the ultrasonic wave receiver 212 receives a signal, the alarm light 16 lights up.

[0031] In this embodiment, specifically: a GPS locator 17 is installed on the top of the controller 14, and the controller 14 is connected to the GPS locator 17 by signal. The GPS locator 17 is used to determine the position of the detection and positioning device. The GPS locator 17 is a 4G Beidou GPS positioning device.

[0032] Working principle or structural principle: When in use, the staff carries the detection and positioning device and moves along the distribution network overhead line. The electromagnetic wave receiver 213 and the ultrasonic receiver 212 detect the electromagnetic waves and ultrasonic waves generated by partial discharge. When one of the electromagnetic wave receiver 213 or the ultrasonic receiver 212 receives a signal, the alarm light 16 lights up, and the staff changes the position of the detection device. When the electromagnetic wave receiver 213 and the ultrasonic receiver 212 receive signals at the same time, the approximate location of the emission source is determined based on the feedback signal. The two receivers are used in combination to avoid missed judgments or misjudgments. After a local insulation defect is found in the cable, the fixing bolt 24 is removed and the connecting plate 23 is fixed to the drone. The drone is used to carry the detection component 20 close to the approximate location of the cable defect, and the infrared imager 211 is used to scan the area. During the scanning process, the first motor 25 is used to drive the turntable 26 to rotate, and the second motor 28 is used to drive the detector body 29 to rotate, changing the angle of the infrared imager 211 to find the specific location of the defect, improve the positioning accuracy, and thereby improve the maintenance efficiency of the distribution network overhead line.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A live detection and locating instrument for insulation defects in overhead power lines of a distribution network, comprising an operating component (10), characterized in that: A detection assembly (20) is provided on the top of the operating assembly (10), and the detection assembly (20) includes a support plate (21), a drive box (22), a connecting plate (23), a fixing bolt (24), a first motor (25), a rotating table (26), an ear seat (27), a second motor (28), a detector body (29), a signal transmitter (210), an infrared imager (211), an ultrasonic receiver (212), and an electromagnetic wave receiver (213); The bottom of the support plate (21) is fixedly connected to a driving box (22), the outer side wall of the driving box (22) is evenly fixedly connected to a connecting plate (23), the internal thread of the connecting plate (23) is connected to a fixing bolt (24), a first motor (25) is installed inside the driving box (22), the top of the support plate (21) is rotatably connected to a turntable (26), the output shaft of the first motor (25) is fixedly connected to the turntable (26), the top of the turntable (26) is fixedly connected to the output shaft of the first motor (25) An ear seat (27) is fixedly connected, a second motor (28) is installed on one side of the ear seat (27), a detector body (29) is rotatably connected inside the ear seat (27), an output shaft of the second motor (28) is fixedly connected to the detector body (29), a signal transmitter (210) is installed on one side of the detector body (29), and an infrared imager (211), an ultrasonic receiver (212) and an electromagnetic wave receiver (213) are installed on the top of the detector body (29).

2. The live detection and locating instrument for insulation defects in overhead power lines of distribution networks according to claim 1, characterized in that: The operating assembly (10) comprises a base (11) and a support rod (12), and the top of the base (11) is fixedly connected to the support rod (12).

3. The live detection and locating instrument for insulation defects in overhead power lines of distribution networks according to claim 2, characterized in that: The outer side wall of the support rod (12) is fixedly connected with a mounting seat (13).

4. The live detection and locating instrument for insulation defects in overhead power lines of distribution networks according to claim 3, characterized in that: A controller (14) is installed on the inner side wall of the mounting seat (13), and a signal receiver (15) is installed on the rear surface of the controller (14).

5. The live detection and locating instrument for insulation defects in overhead power lines of distribution networks according to claim 4, characterized in that: The signal output ends of the infrared imager (211), ultrasonic wave receiver (212) and electromagnetic wave receiver (213) are signal-connected to the signal input end of the signal transmitter (210).

6. The live detection and locating instrument for insulation defects in overhead power lines of a distribution network according to claim 5, characterized in that: The signal output end of the signal transmitter (210) is signal-connected to the signal input end of the signal receiver (15), and the signal output end of the signal receiver (15) is signal-connected to the signal input end of the controller (14).

7. The live detection and locating instrument for insulation defects in overhead power lines of a distribution network according to claim 4, characterized in that: An alarm light (16) is installed on the top of the controller (14), and the controller (14) is electrically connected to the alarm light (16).

8. The live detection and locating instrument for insulation defects in overhead power lines of a distribution network according to claim 4, characterized in that: A GPS locator (17) is installed on the top of the controller (14), and the controller (14) is connected to the GPS locator (17) by signal.

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