A rural distribution network line fault location device

Abstract

This invention belongs to the field of power distribution network line fault detection, specifically disclosing a rural power distribution network line fault location device, including a fault detection and location component and a housing. The fault detection and location component is installed in the middle of the housing. Cable clamping components are symmetrically arranged on both sides of the housing. Each cable clamping component includes a clamp and two clamping blocks. The housing has a movable opening, and the two clamping blocks are installed at the movable opening and connected to the clamp inside the housing. The two clamping blocks have cable clamping openings on opposite sides, and multiple rollers are installed in the clamping openings, with the rollers abutting against the outer wall of the cable. Each clamping block has a locking element inside for locking the rollers. A synchronous driver located in the middle of the housing connects to the clamps of the cable clamping components on both sides. This device offers simple and convenient clamping and fixing operations, and can slide along the cable length direction without repeated disassembly and replacement at the cable fixing position, thus significantly improving fault location efficiency.

Description

Technical Field

[0001] This invention belongs to the field of power distribution line fault detection, and specifically relates to a rural power distribution line fault location device. Background Technology

[0002] In rural power distribution networks, fault location is a crucial step in ensuring power supply reliability. Rural power distribution lines are widely distributed and operate in complex environments, frequently affected by factors such as strong winds, thunderstorms, and vegetation growth, leading to faults. Rapid and accurate fault location can significantly shorten repair time and reduce power outage losses. Therefore, various fault location devices for power distribution lines have emerged. Among them, clamp-type installation devices have found some application in rural power distribution line maintenance due to their advantages of not damaging cable structures and high installation flexibility.

[0003] Existing rural power distribution network fault location devices typically employ a clamping structure design. Their core working principle is as follows: the device is fixed to the power distribution cable to be tested via a clamping mechanism. Then, the device's built-in fault detection components (such as current sensors, voltage sensors, and signal acquisition modules) collect the cable's electrical parameters, and combined with a fault location algorithm, the fault point is located. The initial design intention of this type of device is to ensure stable contact between the device and the cable during the testing process through clamping and fixing, avoiding the impact of device displacement on testing accuracy.

[0004] However, existing line fault location devices have significant technical defects in practical applications, seriously affecting the efficiency and applicability of fault location. Specifically, these defects manifest in two ways: First, the clamping and fixing operation is extremely inconvenient. Existing devices mostly use bolt-locking or snap-locking mechanisms. In high-altitude work scenarios, operators need to use tools to open, close, and lock the clamping mechanism, which is not only cumbersome and time-consuming but also increases the safety risks of working at heights. Furthermore, existing clamping mechanisms have poor adaptability to rural power distribution cables of different diameters, often requiring the replacement of clamping components of different specifications to achieve stable fixing, further reducing operational convenience. Secondly, the device cannot slide along the cable. Because the existing device is rigidly fixed to the cable by the clamping mechanism, after completing the detection at a certain position, if it is necessary to detect the adjacent line section, the clamping mechanism must be disassembled, the device moved to the new detection position, and then clamped and fixed again. This process is repetitive and cumbersome, resulting in extremely low efficiency when expanding the fault location range. Especially for fault diagnosis of long-distance rural power distribution lines, the above defects greatly reduce the practicality of the existing device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention aims to provide a fault location device for rural power distribution lines. This device has a very simple and convenient clamping and fixing operation, and can slide along the length of the cable without repeated disassembly, installation, or replacement at the cable fixing position, thereby significantly improving fault location efficiency.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A rural power distribution network line fault location device includes a fault detection and location component and a housing. The fault detection and location component is installed in the middle of the housing. Cable clamping components are symmetrically arranged on both sides of the housing. Each cable clamping component includes a clamp and two clamping blocks. The housing has a movable opening, and the two clamping blocks are slidably installed at the movable opening perpendicular to the cable axis and connected to the clamp inside the housing. The two clamping blocks have cable clamping openings on opposite sides, and multiple rollers are installed in the clamping openings. The rollers are arranged perpendicular to the cable axis and abut against the outer wall of the cable. Each clamping block has a locking element inside for locking the rollers. A synchronous driver located in the middle of the housing is connected to the clamps of the cable clamping components on both sides to drive the clamps to move synchronously.

[0007] Furthermore, the clamp includes two transmission components symmetrically arranged corresponding to the clamping block. Each transmission component includes a connecting rod, a swing arm, and a sector gear. The center of the sector gear is rotatably connected to the housing via a rotating shaft. One end of the swing arm is vertically fixed to the rotating shaft, and the other end of the swing arm is rotatably connected to one end of the connecting rod. A rack is horizontally mounted on the lower end of the clamping block inside the housing along its direction of movement, and the rack meshes with the sector gear of the corresponding transmission component. The other ends of the connecting rods on both sides are rotatably connected to the two ends of a horizontally arranged moving plate. The synchronous driver is connected to the moving plates of the clamping components on both sides of the housing and is used to drive the moving plates to move up and down synchronously.

[0008] Furthermore, the synchronous drive includes a transmission rod and a screw. The transmission rod is horizontally movably disposed inside the housing, and its two ends are respectively fixedly connected to the moving plates of the wire clamping assemblies on both sides. The screw is vertically disposed in the middle of the housing, and its lower end is rotatably connected to the bottom of the housing. The moving plate is threaded onto the screw. The lower end of the screw movably extends out of the housing and is connected to the rotary drive component on the housing.

[0009] Furthermore, the rotary drive includes a crank handle, which is fixedly connected to the end of the screw that extends out of the housing.

[0010] Furthermore, the locking component includes a locking block, a bolt, and a push plate. The locking block has a cavity inside. The bolt threaded through the side wall of the locking block extends into the cavity and is rotatably connected to the push plate in the cavity. Multiple locking blocks corresponding to and cooperating with the roller are fixed on the push plate.

[0011] Furthermore, the locking block is provided with a locking groove that is adapted to the circumference of the roller.

[0012] Furthermore, a resistance-increasing plate is fixedly provided inside the locking groove.

[0013] Furthermore, the clamping opening is a semi-circular arc-shaped groove that mates with the circumference of the cable.

[0014] Furthermore, a slide rail is horizontally installed on the inner wall of the housing, and two corresponding clamping blocks are slidably installed on the same slide rail.

[0015] The beneficial effects of this invention are as follows: 1. When the movable plate of this invention moves vertically downwards, it drives the connecting rods of the corresponding transmission components below the front and rear clamping blocks to move. This, in turn, causes the corresponding rotating shaft and sector gear to rotate via two swing arms. Under the sliding limit of the slide rail, the corresponding rack drives the two clamping blocks to move in opposite directions, achieving rapid clamping and fixing of the cable. When the movable plate moves vertically upwards, the reverse movement of the transmission components drives the two clamping blocks to move rapidly horizontally away, achieving release of the cable clamping.

[0016] 2. When the screw is rotated by the crank handle, the transmission rod can be driven to move vertically up and down. The transmission rod drives the moving plates of the transmission components on both sides to move vertically, realizing the synchronous driving of the left and right clamps, thereby significantly improving the cable fixing efficiency.

[0017] 3. In this invention, after the cable is clamped in the jaws between two clamping blocks, the rollers abut against the outer wall of the cable. When the device moves along the length of the cable, the rolling of the rollers enables rapid lateral movement of the device, thereby locating the fault area on the line. After the device moves to the fault area on the cable, the bolts on the clamping blocks are tightened, causing them to move towards the corresponding rollers via the push plate. The resistance-increasing plate in the locking groove then abuts against the outer wall of the roller, effectively locking and fixing the roller. This effectively prevents the movement of the device during fault analysis from affecting the accuracy of the detection and analysis results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the clamp of the present invention; Figure 3 This is a schematic diagram showing the connection between the bolt and the push plate of the present invention; Figure 4 This is a cross-sectional view of the locking block of the present invention. Detailed Implementation

[0019] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] like Figure 1-4 As shown, this invention proposes a rural power distribution network line fault location device, including a fault detection and location component 11 and a housing 1. The fault detection and location component 11 is installed in the middle of the housing 1. The fault detection and location module in this invention adopts commonly used techniques in the field of power distribution network line fault location. Its core function is to collect electrical parameters of the power distribution network cables (such as current, voltage, fault traveling wave signals, etc.) and to identify and locate the fault point through a built-in fault location algorithm. The specific circuit structure and signal processing logic of this module are all existing mature technologies and will not be described in detail here.

[0021] The fault detection and positioning component 11 of this invention has two wire clamping assemblies symmetrically arranged on the left and right sides of its housing. Each wire clamping assembly includes a clamp and two clamping blocks 2. Corresponding movable openings 13 are provided on the upper left and right sides of the housing 1. The two clamping blocks 2 are slidably installed back and forth at the movable openings 13 perpendicular to the cable axial direction and connected to the clamps provided inside the housing 1. Specifically, a slide rail 12 is horizontally installed on the inner wall of the housing 1 in the back-to-back direction. The two corresponding clamping blocks 2 are slidably installed on the same slide rail 12. The cooperation between the clamping blocks 2 and the slide rail 12 improves the stability of the clamping blocks 2 when moving back and forth.

[0022] The clamping device includes two transmission components that are symmetrically arranged and correspond to the clamping block 2. Each transmission component includes a connecting rod 32, a swing arm 33, and a sector gear 34. The center of the sector gear 34 is rotatably connected to the inner wall of the housing 1 via a rotating shaft. One end of the swing arm 33 is vertically fixed to the rotating shaft, and the other end of the swing arm 33 is rotatably connected to one end of the connecting rod 32. A rack 35 is horizontally mounted at the lower end of the clamping block 2 inside the housing 1. The rack 35 meshes with the sector gear 34 of the corresponding transmission component. The other ends of the connecting rods 32 of the two transmission components are rotatably connected to the front and rear ends of the same moving plate 31, respectively. A synchronous driver located in the middle of the housing 1 is connected to the moving plates 31 of the clamping devices on both sides of the housing 1 and is used to drive the moving plates 31 to move up and down synchronously.

[0023] When the movable plate 31 moves vertically downwards, it drives the connecting rods 32 of the corresponding transmission components below the two clamping blocks 2 to move. The two swing arms 33 drive the corresponding rotating shaft and sector gear 34 to rotate. Under the sliding limit of the slide rail 12, the corresponding rack 35 drives the two clamping blocks 2 to move in opposite directions, achieving rapid clamping and fixing of the cable. When the movable plate 31 moves vertically upwards, the reverse action of the transmission components drives the two clamping blocks 2 to move quickly horizontally away, achieving release of the clamped cable.

[0024] The synchronous drive includes a transmission rod 41 and a screw 42. The transmission rod 41 is horizontally movably disposed inside the housing 1, and its two ends are respectively fixedly connected to the moving plates 31 of the wire clamping assemblies on both sides. The screw 42 is vertically disposed in the middle of the housing 1, and its lower end is rotatably connected to the bottom of the housing 1. The moving plate 31 is threaded onto the screw 42. The lower end of the screw 42 movably extends out of the housing 1 and is connected to the rotary drive component on the housing 1. In this embodiment, the rotary drive component includes a crank handle 43, which is fixedly connected to the end of the screw 42 that extends out of the housing 1.

[0025] When the crank handle 43 drives the screw 42 to rotate, the transmission rod 41 can move vertically up and down. The transmission rod 41 drives the moving plates 31 of the transmission components on both sides to move vertically, realizing the synchronous driving of the left and right clamps, thereby significantly improving the cable fixing efficiency.

[0026] Two clamping blocks 2 have clamping openings 20 on opposite sides. Each clamping opening 20 is a semi-circular groove that mates with the circumference of the cable, allowing for the fixing of cables of different sizes and models. Multiple rollers 5 are installed within the clamping openings 20, positioned perpendicular to the cable axis and abutting against the outer wall of the cable. The clamping blocks 2 contain locking components for securing the rollers 5. Specifically, the locking components include locking blocks 63, bolts 61, and a push plate 62. The clamping blocks 2 have a cavity inside, and the mounting slots of the rollers 5 communicate with this cavity. Bolts 61, located away from the clamping openings 20, are threaded through the side wall of the clamping blocks 2, extend into the cavity, and are rotatably connected to the push plate 62 within the cavity. Multiple locking blocks 63, corresponding to the rollers 5, are fixed on the push plate 62. Each locking block 63 has a locking groove 630 that circumferentially matches the roller 5. A resistance-increasing plate 631 is fixed within the locking groove 630.

[0027] After the cable is clamped in the jaws between the two clamping blocks 2, the roller 5 abuts against the outer wall of the cable. When the device moves along the length of the cable, the rolling of the roller 5 enables the device to move quickly laterally, thereby locating the fault area on the line. After the device moves to the fault area on the cable, the bolts 61 on the clamping blocks 2 are tightened, causing the push plate 62 to drive the locking block 63 to move closer to the corresponding roller 5. The resistance-increasing plate 631 in the locking groove 630 abuts against the outer wall of the roller 5, effectively locking and fixing the roller 5. This effectively prevents the movement of the device during fault analysis from affecting the accuracy of the detection and analysis results.

[0028] In use, the invention rotates the crank handle 43 to move the transmission rod 41 downwards, which in turn moves the moving plates 31 of the two clamps simultaneously. Utilizing the linkage 32, rocker arm, sector gear 34, and rack 35, the two sets of clamping blocks 2 move closer together, clamping the cable in the clamping openings 20 of the two corresponding clamping blocks 2. Then, by using the rolling action of the roller 5 against the outer wall of the cable, the device can be moved to locate and detect fault areas. After being moved into position, the bolts 61 on the clamping blocks 2 are tightened to lock the locking block 63 against the roller 5, allowing for further precise analysis and detection of cable faults.

[0029] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A rural power distribution network line fault location device, comprising a fault detection and location component and a housing, characterized in that: The fault detection and positioning component is installed in the middle of the housing; symmetrical wire clamping components are provided on the housing on both sides of the fault detection and positioning component; each wire clamping component includes a clamp and two clamping blocks, and the housing has a movable opening, with the two clamping blocks slidably installed at the movable opening perpendicular to the cable axis and connected to the clamp inside the housing; the two clamping blocks have wire clamping openings on opposite sides, with multiple rollers installed in the wire clamping openings, the rollers being arranged perpendicular to the cable axis and abutting against the outer wall of the cable; each clamping block has a locking element inside for locking the rollers; a synchronous driver provided in the middle of the housing is connected to the clamps of the wire clamping components on both sides for driving the clamps on both sides to move synchronously.

2. The rural power distribution network line fault location device according to claim 1, characterized in that: The clamping device includes two transmission components symmetrically arranged corresponding to the clamping block. Each transmission component includes a connecting rod, a swing arm, and a sector gear. The center of the sector gear is rotatably connected to the housing via a rotating shaft. One end of the swing arm is vertically fixed to the rotating shaft, and the other end of the swing arm is rotatably connected to one end of the connecting rod. A rack is horizontally mounted on the lower end of the clamping block inside the housing along its direction of movement. The rack meshes with the sector gear of the corresponding transmission component. The other ends of the connecting rods on both sides are rotatably connected to the two ends of a horizontally arranged moving plate. The synchronous driver is connected to the moving plates of the clamping components on both sides of the housing and is used to drive the moving plates to move up and down synchronously.

3. The rural power distribution network line fault location device according to claim 2, characterized in that: The synchronous drive includes a transmission rod and a screw. The transmission rod is horizontally movably disposed inside the housing, and its two ends are respectively fixedly connected to the moving plates of the wire clamping assemblies on both sides. The screw is vertically disposed in the middle of the housing, and its lower end is rotatably connected to the bottom of the housing. The moving plate is threaded onto the screw. The lower end of the screw movably extends out of the housing and is connected to the rotary drive component on the housing.

4. The rural power distribution network line fault location device according to claim 3, characterized in that: The rotary drive component includes a crank handle, which is fixedly connected to the end of the screw that extends out of the housing.

5. The rural power distribution network line fault location device according to claim 1, characterized in that: The locking component includes a locking block, a bolt, and a push plate. The locking block has a cavity inside. The bolt threaded through the side wall of the locking block extends into the cavity and is rotatably connected to the push plate in the cavity. Multiple locking blocks corresponding to and cooperating with the rollers are fixed on the push plate.

6. The rural power distribution network line fault location device according to claim 5, characterized in that: The locking block has a locking groove that matches the circumference of the roller.

7. The rural power distribution network line fault location device according to claim 6, characterized in that: A resistance-increasing plate is fixed inside the locking groove.

8. The rural power distribution network line fault location device according to claim 1, characterized in that: The clamping opening is a semi-circular arc-shaped groove that fits the circumference of the cable.

9. The rural power distribution network line fault location device according to claim 1, characterized in that: A slide rail is horizontally installed on the inner wall of the housing, and two corresponding clamping blocks are slidably installed on the same slide rail.

Images