Power distribution network fault detection and positioning device

Abstract

The invention belongs to the technical field of power distribution network fault detection, and particularly relates to a power distribution network fault detection and positioning device which comprises a mobile terminal host and an ultrasonic detector connected with the mobile terminal host and further comprises a hinge frame, a petal-shaped shell and an alloy buckle cover. The hinge frame is used for lifting the ultrasonic detector when in an extending state, the two sets of petal-shaped shells are arranged on the two sides of the ultrasonic detector respectively, a traction piece and a hinge seat connected with the traction piece are arranged between the two sets of petal-shaped shells, the three petal-shaped shells in each set are sequentially nested, and main magnets are embedded in the three petal-shaped shells. A traction belt is connected between the outer sides of every two adjacent petal-shaped shells. The hinge frame is operated by two hands to extend upwards, so that the three petal-shaped shells are opened one by one, the ultrasonic detector is exposed after the ultrasonic detector crosses an obstacle, external protection, surrounding ultrasonic wave blocking and internal soft protection are achieved, and the ultrasonic detector can be folded and stored after detection is completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of distribution network fault detection, and in particular relates to a distribution network fault detection and positioning device. Background Art

[0002] The distribution network covers a wide area, surrounding places with clear boundaries such as residential areas and production sites. The voltage level of the distribution network is lower than that of the transmission network, usually less than 35 kV, and the form is more complex, including overhead lines, cables, substations and other equipment and facilities. Once it is bent by branches or ice, or other faults occur, it will directly lead to unstable power transmission in the area, and personnel need to be dispatched for maintenance.

[0003] Handheld gun-type electrical fault detectors mainly use ultrasonic detection technology and can receive ultrasonic signals generated by partial discharge of power equipment. This signal is a sound wave above 20kHz, which cannot be heard by human ears. The inspectors use the handheld gun-type inspection instrument to receive these ultrasonic signals through the built-in ultrasonic sensor and judge the location and intensity of partial discharge based on the strength and waveform of the signal. However, there are still some limitations in the detection process: The trees below the distribution network will block or diffusely reflect the ultrasonic signal, and the inspectors holding gun-type inspection instruments below will receive distorted signals, which greatly reduces the authenticity of the detection results.

[0004] Inspection personnel use hollow rods to lift the gun-type inspection instrument, which is inconvenient to carry during subsequent inspections and can easily delay the inspection progress. Summary of the invention

[0005] The purpose of the present invention is to provide a distribution network fault detection and positioning device, which can operate the hinged frame with both hands to extend the belt upward to realize the opening of three petal-shaped shells one by one, and expose the ultrasonic detector after crossing the obstacle, so as to realize external protection, blocking the surrounding ultrasonic waves and internal soft protection, and can be folded and stored after the detection is completed.

[0006] The technical solution adopted by the present invention is as follows: A distribution network fault detection and positioning device, comprising a mobile terminal host and an ultrasonic detector connected to the mobile terminal host, and further comprising: An articulated frame, one end of which is connected to the root of the ultrasonic detector, and the articulated frame is used to lift the ultrasonic detector when in an extended state; Petal-shaped shells, two groups of petal-shaped shells are respectively arranged on both sides of the ultrasonic detector and a pulling member and a hinge seat connected to the pulling member are arranged between them, three petal-shaped shells in each group are nested in sequence and main magnets are embedded in the three petal-shaped shells, and a traction belt is connected between the outer sides of two adjacent petal-shaped shells; Alloy buckle cover, the alloy buckle cover is arranged at the opening of the two groups of petal-shaped shells, the alloy buckle cover has an arc and a hollow clip and a sleeve extending into the two groups of petal-shaped shells are fixed on its inner surface, a plastic elastic part is fixed in the middle of the hollow clip and auxiliary magnets for attracting the main magnet are fixed on both sides of the hollow clip; During detection, the articulated frame extends and drives the three petal-shaped shells to open one by one, so as to expose the ultrasonic detector after crossing obstacles; when carrying, the articulated frame compresses and drives the two groups of petal-shaped shells to close, and the alloy buckle cover covers the petal-shaped shells for external protection.

[0007] As an optional solution, the pulling member includes a sliding rail fixedly connected to the articulated seat, an articulated yoke is arranged between the outer side of the sliding rail and one end of the articulated frame, and the outside of the two groups of the petal-shaped shells are fixed with a first elastic band fixedly connected to the sliding rail and a second elastic band fixedly connected to the articulated yoke.

[0008] As an optional solution, a foam tube and a cleaning sponge sleeve fixedly connected to the inner wall of the foam tube are fixed to the inner side of the sleeve, and a plurality of paper strips are embedded at intervals inside the cleaning sponge sleeve, and the paper strips change color when in contact with water.

[0009] As an optional solution, a slot communicating with the cleaning sponge sleeve is provided inside the foam tube, and a clip bonded to the paper strip is inserted inside the slot.

[0010] As an optional solution, the articulated frame includes two groups of hollow tubes intersecting each other, a first hollow shaft inserted in the middle of the two intersecting hollow tubes, and a second hollow shaft inserted at both ends of the two intersecting hollow tubes, wherein the two hollow tubes at one end of the articulated frame are hinged to the articulated fork.

[0011] As an optional solution, a threading hole is provided in the middle of the first hollow shaft, and an insulating ring for limiting the position of the ultrasonic detector cable is fixed inside the threading hole.

[0012] As an optional solution, a sleeve is welded to one end of the two crossed hollow tubes, a hollow handle is threadedly installed at the opening of the sleeve, and an isolation rod for separating the ultrasonic detector cables is fixed to one side of the handle.

[0013] As an optional solution, the articulated fork is "V"-shaped and a pin head with a hole is fixed in the middle of the "V" shape, the outer sleeve of the pin head with a hole is provided with a concave hole clamp seat fixedly connected to the hollow tube, and a pin passes through the hole clamp seat and the pin head with a hole.

[0014] As an optional solution, an insulating cable tie penetrating through the hinge seat is axially fixed to the root of the ultrasonic detector, and a hard plastic cover fixedly connected to the insulating cable tie is provided on the outside of the ultrasonic detector.

[0015] As an optional solution, a rubber ring and a center pad are fixed at intervals on the outer surface of the alloy buckle cover, and the center pad faces the middle of the two groups of petal-shaped shells.

[0016] The technical effects achieved by the present invention are: The two-handedly operated articulated frame of the present invention extends upward to drive the ultrasonic detector to cross an obstacle. At the same time, the three petal-shaped shells are opened one by one through the action of the traction belt, the first elastic belt and the second elastic belt. After crossing the obstacle, the ultrasonic detector is exposed. The three petal-shaped shells are respectively recorded as an outer shell, a middle shell and an inner shell from the outside to the inside, and different materials are selected to achieve external protection, blocking of surrounding ultrasonic waves and internal soft protection.

[0017] In order to facilitate the automatic opening of the three-layer protection when crossing an obstacle, the present invention adopts a slide rail fixedly connected to the articulated seat to support the articulated seat, so that the ultrasonic detector can be suspended in the air when the articulated frame is erected, and the extension of the articulated frame can drive the two articulated yokes to slide close to each other along the two slide rails, and the petal-shaped shell is pulled from both sides by two first elastic bands to be centered above the slide rails, and the second elastic band will apply traction force to the petal-shaped shell when pulled by the articulated yoke, thereby realizing the three petal-shaped shells rotating and opening one by one around the articulated seat.

[0018] After the detection of the present invention is completed, the hinged frame is compressed and folded for easy carrying, and the two groups of petal-shaped shells are closed together by the attraction of the main magnet. In order to cope with the bumpy conditions of the detection route, the alloy buckle cover is set at the openings of the two groups of petal-shaped shells, so that the alloy buckle cover carrying the hollow clip and the sleeve are gradually inserted into the opening. As the sleeve covers the ultrasonic detector for circumferential protection, the diamond-shaped hollow clip gradually opens under the rebound action of the plastic elastic part, and can be limited in the two groups of petal-shaped shells, and drive the auxiliary magnet to attract the main magnet, so as to achieve the limit and tighten the alloy buckle cover at the same time to prevent it from breaking free due to the bumpy road section.

[0019] After the detection is completed, the cleaning sponge sleeve in the sleeve is used to stick to the ultrasonic detector to scrape off dust through friction, and the foam tube is used to support the cleaning sponge sleeve and serve as an inner sheath to dampen the ultrasonic detector. A plurality of paper strips are embedded at intervals inside the cleaning sponge sleeve. These paper strips change color when they come into contact with water, indicating that water droplets are attached to the ultrasonic detector and need to be cleaned in time to prevent damage such as rust. At the same time, a "V"-shaped clip is tightly inserted into the card slot to support the paper strip to stay stably inside the cleaning sponge sleeve, and the paper strip itself can be deformed under pressure without damaging the ultrasonic detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a distribution network fault detection and positioning device of the present invention in a state about to be opened; Figure 2 is a front view of the articulated frame of the present invention; Figure 3 It is a partial cross-sectional view of a distribution network fault detection and positioning device of the present invention; Figure 4 is a front view of the ultrasonic detector of the present invention; Figure 5 is a side view of the petal-shaped housing of the present invention; Figure 6 It is a front view of the alloy buckle cover of the present invention; Figure 7 is a front view of the hollow clip of the present invention; Figure 8 is a bottom view of the sleeve of the present invention; Fig. 9 is a side view of the articulated yoke of the present invention; Fig.10 It is a front view of two hollow tubes of the present invention in a hinged state; Fig.11 is a top view of the first hollow shaft of the present invention; Fig.12 is a top view of the second hollow shaft of the present invention; Fig.13 It is a front view of a grip of the present invention.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Mobile terminal host; 2. Ultrasonic detector; 3. Petal-shaped shell; 301. Articulated seat; 302. Main magnet; 303. Traction belt; 4. Alloy buckle cover; 401. Hollow clamp; 402. Plastic elastic part; 403. Auxiliary magnet; 404. Sleeve; 5. Slide rail; 6. Articulated yoke; 7. First elastic belt; 8. Second elastic belt; 9. Foam tube; 10. Cleaning sponge cover; 11. Paper strip; 12. Card slot; 13. Clip; 14. Hollow tube; 15. First hollow shaft; 16. Second hollow shaft; 17. Threading hole; 18. Insulating ring; 19. Sleeve; 20. Handle; 21. Isolation rod; 22. Pin head with hole; 23. Clamp seat with hole; 24. Pin; 25. Insulating cable tie; 26. Hard plastic cover; 27. Rubber ring; 28. Center pad. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0023] The distribution network mainly serves areas with clear boundaries such as residential areas and production sites, and has certain requirements for the supporting greening level. In particular, in order to meet the global goal of carbon reduction and emission reduction, there are more green trees in these places. Alternatively, the distribution network is built in a sparsely populated area with lush trees and obvious obstruction, which brings inconvenience to the inspection work.

[0024] like Figure 1-Figure 13 As shown, a distribution network fault detection and positioning device includes a mobile terminal host 1 and an ultrasonic detector 2 connected to the mobile terminal host 1, and also includes an articulated frame, a petal-shaped shell 3, and an alloy buckle cover 4. One end of the articulated frame is connected to the root of the ultrasonic detector 2. When the articulated frame is in an extended state, it is used to lift the ultrasonic detector 2. When carried, the articulated frame compresses and drives the two groups of petal-shaped shells 3 to close, and the alloy buckle cover 4 covers the petal-shaped shells 3 for external protection; when detecting, the articulated frame extends and drives the three petal-shaped shells 3 to open one by one, so as to expose the ultrasonic detector 2 after crossing obstacles (such as green trees), and the ultrasonic detector 2 receives ultrasonic waves higher than 20kHz emitted by the distribution network, converts them into electrical signals and transmits them to the mobile terminal host 1 along the cable, draws a voltage waveform and displays it on the LCD screen, and judges whether it is a fault based on the comparison between the real-time peak voltage and the preset voltage, so as to find the fault point in time.

[0025] Among them, the ultrasonic detector 2 can use an ultrasonic focusing probe to detect ultrasonic signals during surface discharge, partial discharge or mechanical vibration of the equipment. The detection range is no more than 100m, and the high frequency is 20kHz to 100kHz; The mobile terminal host 1 includes: (1) Ultrasonic data processing unit, which completes pre-processing functions such as ultrasonic signal amplification, analog-to-digital conversion, and peak detection; (2) Control and analysis unit, which mainly completes the functions of FFT analysis of ultrasonic data, collection and compensation calculation of temperature and humidity data, collection of satellite positioning data, storage and import and export of test data, modification of instrument parameter data, and entry of test information; (3) Satellite positioning unit refers to the configured satellite positioning module, such as GPS module, Beidou satellite positioning module, etc. (4) Temperature and humidity sensing unit, used to detect and record temperature and humidity data when defects occur; (5) Storage unit refers to the medium for data storage, including internal memory or data storage card; (6) Human-computer interaction unit, mainly equipped with control buttons, LCD screen, headphones and external speakers; (7) Auxiliary units, including chargers, spare batteries, etc.

[0026] This detection process mostly relies on binary point selection detection, which mainly arranges at least two groups of inspection personnel to inspect from both ends to the middle, gradually approaching the fault point, avoiding comprehensive inspection of the entire line, and greatly reducing the inspection workload.

[0027] In an environment with obstacles or other power distribution equipment, the ultrasonic detector 2 will be interfered by at least one of obstacles such as tree branches and surrounding ultrasonic waves. It is not enough to resist obstacles or surrounding ultrasonic waves alone. It needs to have at least two protection capabilities at the same time to have good safety in crossing obstacles to detect the distribution network above.

[0028] See attached Figure 1 , Figure 3 and Figure 5 In order to have at least two kinds of protection capabilities, the two groups of petal-shaped shells 3 of this embodiment are respectively arranged on both sides of the ultrasonic detector 2 and a pulling piece and a hinge seat 301 connected to the pulling piece are arranged between them, so that the two groups of petal-shaped shells 3 can be rotated and opened around the hinge seat 301 under the pulling force of the pulling piece, and the three petal-shaped shells 3 of each group are nested in sequence and the three petal-shaped shells 3 are embedded with main magnets 302. Through the mutual attraction of the main magnets 302, the three petal-shaped shells 3 are tightly attached together. The three petal-shaped shells 3 are respectively recorded as outer shell, middle shell and inner shell from outside to inside. With the push of the hinge frame, the pulling piece applies pulling force to the outer shell outward, pulls the main magnet 302 one by one, and at the same time, through the traction of the traction belt 303 connected between the outer sides of the two adjacent petal-shaped shells 3, the outer shell, middle shell and inner shell are opened one by one, and finally the ultrasonic detector 2 is exposed.

[0029] Furthermore, the outer shell can be made of stainless steel to prevent puncture and external scratches. The middle shell can be made of extruded board material, which has high density and small mass and can reflect surrounding ultrasonic waves. The inner shell can be made of lightweight plastic sheet. A sponge layer is adhered to the inner wall as a soft liner to buffer and reduce shock for the ultrasonic detector 2. Once it is against the ultrasonic detector 2, it will not cause scratches. In the process of opening the three-layer protection, it can achieve external protection, blocking of surrounding ultrasonic waves and internal soft protection.

[0030] See attached Figure 3 , Figure 4 and Figure 5In order to facilitate the automatic opening of the three-layer protection when crossing an obstacle, the pulling member of this embodiment includes a slide rail 5 welded to the hinge seat 301. The two slide rails 5 are used to support the hinge seat 301, so that the ultrasonic detector 2 can be suspended in the air when the hinge frame is erected, and the transmission is carried out through the hinge yoke 6 arranged between the outer side of the slide rail 5 and one end of the hinge frame. The extension of the hinge frame can drive the two hinge yokes 6 to slide close to each other along the two slide rails 5, and the first elastic band 7 bonded to the slide rail 5 and the second elastic band 8 bonded to the hinge yoke 6 are bonded to the outside of the two groups of petal-shaped shells 3. The petal-shaped shells 3 are pulled from both sides to be centered above the slide rails 5 by the two first elastic bands 7, and the second elastic band 8 will apply traction to the petal-shaped shells 3 when pulled by the hinge yoke 6, so that the three petal-shaped shells 3 can be rotated and opened around the hinge seat 301 one by one.

[0031] See attached Figure 1 , Figure 2 and Fig. 9 The articulated frame includes two groups of intersecting hollow tubes 14, a first hollow shaft 15 inserted between the two intersecting hollow tubes 14, and a second hollow shaft 16 inserted at both ends of the two intersecting hollow tubes 14. When in use, both hands apply force to the two groups of intersecting hollow tubes 14, first rotate forward relative to the first hollow shaft 15 and the second hollow shaft 16, the angle becomes smaller, the total length becomes larger, and the maximum extension distance is not less than 4m. Moreover, the hollow tube 14 can be made of high-strength aluminum alloy profiles, and the first hollow shaft 15 and the second hollow shaft 16 can be made of stainless steel. In this way, the whole device is lighter, with a total weight of no more than 4kg. It can be lifted by both hands and can stably support the ultrasonic detector 2 with a very small weight. Among them, the two hollow tubes 14 at one end of the articulated frame are hinged to the articulated yoke 6, and can swing relative to their connection points with the articulated yoke 6 and move smoothly.

[0032] See attached Figure 1 and Fig.13 In order to facilitate the user to hold, in this embodiment, sleeves 19 are welded at one end of the two crossed hollow tubes 14, and a hollow handle 20 is threadedly installed at the opening of the sleeve 19. The two hard plastic handles 20 are convenient for the user to hold to operate the extension or compression of the hinge frame. An isolation rod 21 for separating the cables of the ultrasonic detector 2 is bonded to one side of the handle 20. Once the handle 20 is closed during the extension of the hinge frame, the two isolation rods 21 are engaged and limited to leave a safe space for the cable to move. After the detection is completed, the handle 20 can be unscrewed along the thread, which is convenient for disassembly and scattered carrying.

[0033] See attached Figure 2 , Fig.10 and Fig.11Since the ultrasonic detector 2 needs to climb to a height of more than 4m, the required cable is also relatively long. In order to prevent the cable from shaking, this embodiment has a threading hole 17 for limiting the cable in the middle of the first hollow shaft 15, and an insulating ring 18 for limiting the cable of the ultrasonic detector 2 is bonded inside the threading hole 17. The insulating ring 18 is made of soft silicone material and will not scratch the cable.

[0034] See attached Figure 3 and Figure 4 The root of the ultrasonic detector 2 is axially fixed with an insulating cable tie 25 that passes through the hinge seat 301 by screws, so as to strengthen the connection between the root of the ultrasonic detector 2 and the cable to prevent it from being pulled apart or cracked. A hard plastic cover 26 bonded to the insulating cable tie 25 is sleeved on the outside of the ultrasonic detector 2, and the ultrasonic wave radiated into the inside of the hard plastic cover 26 is reflected and concentrated to the ultrasonic detector 2. It only needs to point the hard plastic cover 26 toward the designated area of ​​the distribution network to successfully detect, which is convenient and reduces the difficulty of operation.

[0035] See attached Figure 3 , Figure 6 and Figure 7 After the detection is completed, the hinged frame is compressed and folded for easy carrying, and the two sets of petal-shaped shells 3 are closed together by the attraction of the main magnet 302. However, the detection distance is long and the road bumps may shake it apart, which requires further reinforcement. Therefore, in this embodiment, the alloy buckle cover 4 is set at the opening of the two sets of petal-shaped shells 3, and the alloy buckle cover 4 is designed to have an arc that fits the opening and has a hollow clip 401 and a sleeve 404 extending between the two sets of petal-shaped shells 3 bonded to its inner surface, so that the alloy buckle cover 4 carrying the hollow clip 401 and the sleeve 404 are gradually inserted into the opening, and the hollow clip 4 is inserted into the hollow clip 4. 01 is bonded with a plastic elastic part 402 in the middle and auxiliary magnets 403 for attracting the main magnet 302 are bonded on both sides of the hollow clip 401. The diamond-shaped hollow clip 401 is squeezed by the petal-shaped shell 3 to stretch the plastic elastic part 402 and is smoothly inserted; as the sleeve 404 covers the ultrasonic detector 2 for circumferential protection, the diamond-shaped hollow clip 401 gradually opens under the rebound action of the plastic elastic part 402, and can be limited in position within the two groups of petal-shaped shells 3, and drive the auxiliary magnet 403 to attract the main magnet 302, thereby achieving the limit and tightening the alloy buckle cover 4 at the same time to prevent it from breaking free due to road bumps.

[0036] See attached Figure 3 , Figure 6 and Figure 8A foam tube 9 and a cleaning sponge cover 10 bonded to the inner side of the sleeve 404 are bonded to the inner wall of the foam tube 9. In the process of gradually covering the ultrasonic detector 2, the cleaning sponge cover 10 is used to stick to the ultrasonic detector 2 to scrape off dust through friction. The foam tube 9 supports the cleaning sponge cover 10 and serves as an inner sheath to shock-absorb the ultrasonic detector 2. A plurality of paper strips 11 are embedded at intervals inside the cleaning sponge cover 10. These paper strips 11 change color when they come into contact with water, for example, from white to red, indicating that water droplets are attached to the ultrasonic detector 2 and need to be cleaned in time to prevent damage such as rust.

[0037] See attached Figure 3 , Figure 6 and Figure 8 A card slot 12 connected to the cleaning sponge sleeve 10 is provided inside the foam tube 9. Since the paper strip 11 is easy to slip, a clip 13 bonded to the paper strip 11 is inserted into the card slot 12 in this embodiment. The "V"-shaped clip 13 is tightly inserted into the card slot 12 to support the paper strip 11 to stay stably inside the cleaning sponge sleeve 10, and the paper strip 11 itself can be deformed under pressure without damaging the ultrasonic detector 2.

[0038] See attached Figure 1 and Figure 6 The outer surface of the alloy buckle cover 4 is bonded with rubber rings 27 and center pads 28 at intervals. The center pads 28 face the middle of the two sets of petal-shaped shells 3. After covering the alloy buckle cover 4, the rubber rings 27 and center pads 28 are used to protect it from different points. The protective structure is more three-dimensional, and the rubber rings 27 can be pulled by hand, which is convenient for opening the alloy buckle cover 4 later.

[0039] See attached Figure 1 and Fig. 9 The articulated yoke 6 is in a "V" shape and a pin head 22 with a hole is integrated in the middle of the "V" shape. The outer part of the pin head 22 is provided with a concave hole clamp seat 23 which is key-connected to the hollow tube 14. A pin 24 runs through the hole clamp seat 23 and the pin head 22. The articulated yoke 6 can swing around the pin 24 at a certain angle. The nut of the pin 24 can also be unscrewed and pulled out from between the hole clamp seat 23 and the pin head 22 to separate the articulated yoke 6 and the articulated frame. The split type is more convenient to carry.

[0040] The working principle of the present invention is: during detection, both hands apply force to the two groups of intersecting hollow tubes 14 respectively, which first rotate forward relative to the first hollow shaft 15 and the second hollow shaft 16, the angle becomes smaller, and the total length becomes larger. At the same time, the petal-shaped shell 3 is pulled from both sides by the two first elastic bands 7 to be centered above the slide rail 5, and the second elastic band 8 will apply traction force to the petal-shaped shell 3 when pulled by the hinged fork 6, so that the three petal-shaped shells 3 can be rotated and opened one by one around the hinged seat 301, so as to expose the ultrasonic detector 2 after crossing the obstacle.

[0041] At this time, ultrasonic detector 2 receives ultrasonic waves with a frequency higher than 20kHz emitted by the distribution network, converts them into electrical signals and transmits them along the cable to mobile terminal host 1. The voltage waveform is drawn and displayed on the LCD screen. By comparing the real-time peak voltage with the preset voltage, it is determined whether there is a fault, which makes it convenient to find the fault point in time.

[0042] After the detection is completed, the articulated frame is compressed and folded for easy carrying, and the two groups of petal-shaped shells 3 are closed together by the attraction of the main magnet 302. The alloy buckle cover 4 is set at the opening of the two groups of petal-shaped shells 3, and the hollow clip 401 and the sleeve 404 are gradually inserted into the opening. The diamond-shaped hollow clip 401 is squeezed by the petal-shaped shells 3 to stretch the plastic elastic part 402 and insert it smoothly; as the sleeve 404 covers the ultrasonic detector 2 for circumferential protection, the diamond-shaped hollow clip 401 gradually opens under the rebound action of the plastic elastic part 402, and can be limited in the two groups of petal-shaped shells 3, and the auxiliary magnet 403 is driven to attract the main magnet 302, so as to achieve the limit while tightening the alloy buckle cover 4 to prevent it from breaking free due to bumps in the road section.

[0043] Then, the cleaning sponge cover 10 is attached to the ultrasonic detector 2 to scrape off dust by friction, and the foam tube 9 is used to support the cleaning sponge cover 10 and act as an inner sheath to dampen the ultrasonic detector 2. A plurality of paper strips 11 are embedded in the cleaning sponge cover 10 at intervals. When these paper strips 11 come into contact with water, the color changes, for example, from white to red, indicating that water droplets are attached to the ultrasonic detector 2 and need to be cleaned in time. A "V"-shaped clip 13 is inserted tightly into the card slot 12 to support the paper strip 11 to stay stably inside the cleaning sponge cover 10, and the paper strip 11 itself can be deformed under pressure and will not damage the ultrasonic detector 2.

[0044] The above is only an optional implementation of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A distribution network fault detection and positioning device, comprising a mobile terminal host (1) and an ultrasonic detector (2) connected to the mobile terminal host (1), characterized in that: Also includes: An articulated frame, one end of which is connected to the root of the ultrasonic detector (2), and the articulated frame is used to lift the ultrasonic detector (2) when in an extended state; Petal-shaped shells (3), two groups of the petal-shaped shells (3) are respectively arranged on both sides of the ultrasonic detector (2) and a pulling member and a hinge seat (301) connected to the pulling member are arranged between them, and main magnets (302) and traction belts (303) are arranged inside the two groups of the petal-shaped shells (3); An alloy buckle cover (4), the alloy buckle cover (4) being arranged at the openings of the two groups of the petal-shaped shells (3), the alloy buckle cover (4) having an arc and having a hollow clip (401) and a sleeve (404) fixed on its inner surface extending into between the two groups of the petal-shaped shells (3), a plastic elastic member (402) being fixed in the middle of the hollow clip (401) and auxiliary magnets (403) for attracting the main magnet (302) being fixed on both sides of the hollow clip (401); During detection, the hinged frame extends and drives the three petal-shaped shells (3) to open one by one, so as to expose the ultrasonic detector (2) after passing over an obstacle; during carrying, the hinged frame compresses and drives the two groups of petal-shaped shells (3) to close, and the alloy buckle cover (4) covers the petal-shaped shells (3) for external protection.

2. A distribution network fault detection and positioning device according to claim 1, characterized in that: The pulling member comprises a slide rail (5) fixedly connected to the hinge seat (301), an articulation yoke (6) is arranged between the outer side of the slide rail (5) and one end of the articulation frame, and a first elastic band (7) fixedly connected to the slide rail (5) and a second elastic band (8) fixedly connected to the articulation yoke (6) are fixedly arranged on the outside of the two groups of petal-shaped shells (3).

3. A distribution network fault detection and positioning device according to claim 1, characterized in that: A foam tube (9) and a cleaning sponge sleeve (10) fixedly connected to the inner wall of the foam tube (9) are fixedly provided inside the sleeve (404); a plurality of paper strips (11) are embedded at intervals inside the cleaning sponge sleeve (10); and the paper strips (11) change color when in contact with water.

4. A distribution network fault detection and positioning device according to claim 3, characterized in that: The foam tube (9) is provided with a slot (12) in communication with the cleaning sponge sleeve (10), and a clip (13) bonded to the paper strip (11) is inserted into the slot (12).

5. A distribution network fault detection and positioning device according to claim 2, characterized in that: The articulated frame comprises two groups of hollow tubes (14) intersecting each other, a first hollow shaft (15) inserted between the two intersecting hollow tubes (14), and a second hollow shaft (16) inserted at both ends of the two intersecting hollow tubes (14), wherein the two hollow tubes (14) at one end of the articulated frame are both hinged to the articulated yoke (6).

6. A distribution network fault detection and positioning device according to claim 5, characterized in that: A threading hole (17) is provided in the middle of the first hollow shaft (15), and an insulating ring (18) for limiting the position of the cable of the ultrasonic detector (2) is fixed inside the threading hole (17).

7. A distribution network fault detection and positioning device according to claim 5, characterized in that: A sleeve (19) is welded to one end of each of the two intersecting hollow tubes (14); a hollow handle (20) is threadedly mounted at the opening of the sleeve (19); and an isolation rod (21) for separating the cables of the ultrasonic detector (2) is fixed to one side of the handle (20).

8. A distribution network fault detection and positioning device according to claim 5, characterized in that: The articulated yoke (6) is in a "V" shape, and a pin head with a hole (22) is fixed in the middle of the "V" shape. The pin head with a hole (22) is sleeved on the outside with a concave hole clamp seat (23) fixedly connected to the hollow tube (14). A pin (24) passes through the hole clamp seat (23) and the pin head with a hole (22).

9. A distribution network fault detection and positioning device according to claim 1, characterized in that: An insulating cable tie (25) penetrating the hinge seat (301) is fixed axially to the root of the ultrasonic detector (2), and a hard plastic cover (26) fixedly connected to the insulating cable tie (25) is provided on the outside of the ultrasonic detector (2).

10. A distribution network fault detection and positioning device according to claim 1, characterized in that: A rubber ring (27) and a center pad (28) are fixed at intervals on the outer surface of the alloy buckle cover (4), and the center pad (28) faces the middle of the two groups of petal-shaped shells (3).

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