A distributed power distribution network grounding fault positioning testing device

Abstract

This invention belongs to the field of power distribution network fault detection technology, specifically disclosing a ground fault location and testing device for distributed power distribution networks. The device includes a housing and a detector body. A cover is hinged to the top opening of the housing. The detector body is detachably installed inside the opening of the housing. Assembly blocks are fixed at the four corners of the bottom of the detector body. A locking shock absorber, cooperating with the assembly blocks, is provided at the bottom of the opening of the housing. A storage cavity is provided inside the housing below the detector body. An opening communicating with the storage cavity is provided on the side wall of the housing, and a door is fitted at the opening. A flip-locking linkage connected to the door is installed inside the storage cavity. This device features an integrated structure of shock absorption and locking, partitioned storage, and linkage opening and closing sealing, effectively solving the pain points of existing detection devices such as poor outdoor maintenance protection, unstable fixing, inconvenient access, and weak environmental adaptability.

Description

Technical Field

[0001] This invention belongs to the field of power distribution network fault detection technology, and specifically relates to a grounding fault location and testing device for distributed power distribution networks. Background Technology

[0002] With the nationwide implementation of the new power system, distributed power sources such as wind power, photovoltaics, and distributed energy storage are being integrated into urban and rural low-voltage distribution networks at high density and multiple locations. The distribution network topology is gradually transforming from the traditional unidirectional radial network to a complex multi-source, bidirectional power flow network architecture. The randomness and volatility of network operation have increased significantly, and frequent faults such as single-phase grounding, phase-to-phase short circuits, line breaks, and poor contact have become commonplace, directly affecting regional residential power supply, continuous industrial production, and the safe and compliant operation of distributed power sources. Accurate, rapid, and highly adaptable fault location and detection equipment has become a core and essential supporting equipment for grassroots distribution operation and maintenance teams for routine inspections, fault repairs, grid connection verification, and record-keeping.

[0003] Currently, most conventional distributed power distribution network fault location and detection instruments in the industry are separate handheld single-unit structures without an integrated protective load-bearing enclosure. When operating outdoors under poles, next to ring network cabinets, in outdoor transformer areas, or at open-air maintenance points, they are easily subject to multiple interferences from outdoor conditions such as rain, dust, falling objects from heights, road vibration and impacts, and scratches from messy tools. The precision sampling module, signal acquisition port, and core components of the main unit of the detection instrument have weak vibration and shock resistance. Under long-term high-intensity field inspection operations, the failure rate is high, the detection accuracy drifts, and the service life of the equipment is significantly shortened.

[0004] Existing similar positioning and detection devices only have simple single-layer storage functions. The main body of the detector is mostly laid flat or simply tied and fixed, without a dedicated alignment and assembly structure or an integrated shock-absorbing and locking adapter structure. During vehicle transport, on-site handling, and displacement during high-altitude operations, the detector body is prone to displacement, loosening, and hard collision damage. This not only causes irreversible damage to the equipment hardware, but also indirectly leads to distortion of on-site fault sampling data and positioning judgment deviation, resulting in secondary maintenance problems such as misjudgment, missed judgment, and rework for emergency repairs, which seriously delays the timeliness of power restoration.

[0005] Meanwhile, traditional enclosures lack independent enclosed storage compartments. Accessory materials such as fault location testing harnesses, insulated clamps, phase verification tools, portable voltage testing tools, wiring adapters, and field recording fixtures can only be directly piled up with the main unit of the testing instrument. This leads to cables easily getting tangled and knotted, ports easily being crushed and damaged, and accessories easily being lost or misplaced. The on-site retrieval is not organized and the preparation time is long. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention aims to provide a grounding fault location and testing device for distributed power distribution networks. This device features an integrated structure with shock absorption and locking, zoned storage, and linkage opening and closing sealing. It effectively solves the pain points of existing testing devices, such as poor outdoor operation and maintenance protection, unstable fixing, inconvenient access, and weak environmental adaptability. It meets the essential needs of fault detection and maintenance in all scenarios of distributed power distribution networks, and its comprehensive application and promotion benefits are outstanding.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A ground fault location testing device for distributed power distribution networks includes a housing and a detector body. A cover is hinged to the top opening of the housing. The detector body is detachably installed inside the opening of the housing. Assembly blocks are fixed at the four corners of the bottom of the detector body. A locking shock absorber that cooperates with the assembly blocks is provided at the bottom of the opening of the housing. A storage cavity is provided inside the housing below the detector body for placing auxiliary testing tools or wire harnesses. The side wall of the housing has an opening communicating with the storage cavity. A door is fitted at the opening. A flip-up linkage connected to the door is installed inside the storage cavity. The door and the outer edge of the opening are connected by a locking structure.

[0008] Preferably, the bottom of the assembly block has an upward-facing assembly groove, and a locking ring is provided along the inner edge of the lower opening of the assembly groove; a shock-absorbing spring is vertically provided at the top of the fixed-lock shock absorber, and the shock-absorbing spring abuts against the inner top of the assembly groove; the locking part of the fixed-lock shock absorber cooperates with the locking ring.

[0009] Preferably, the fixed-lock shock absorber includes a mounting base and a limiting arm. The mounting base is fixed to the bottom of the housing opening, and the shock-absorbing spring is installed on the top of the mounting base. A vertical groove is provided in the middle of the mounting base, and a side hole communicating with the vertical groove is opened inward on the side wall of the mounting base. A longitudinal sliding block is vertically slidably provided in the vertical groove. The middle part of the limiting arm is vertically rotatably installed in the side hole, and the inner end of the limiting arm is rotatably connected to the longitudinal sliding block. The outer end of the limiting arm extending out of the side hole abuts against the locking ring. A horizontal groove communicating with the vertical groove is opened on the lower side of the mounting base, and a horizontal sliding block is horizontally slidably provided in the horizontal groove. The inner end of the horizontal sliding block and the bottom of the longitudinal sliding block are respectively provided with mutually cooperating abutting inclined surfaces. One end of a screw is horizontally rotatably connected to the outer end face of the horizontal sliding block, and the other end of the screw extends out of the horizontal groove and is threaded through and extends out of the side wall of the housing.

[0010] Preferably, the end of the screw extending out of the housing is provided with an adjusting screw mechanism.

[0011] Preferably, a return spring is vertically abutted against the inner top of the vertical groove, and the return spring abuts against the top of the longitudinal moving block.

[0012] Preferably, the flipping linkage includes a rotating rod and a tension spring. The box door is movably disposed at the box opening. A support guide plate is fixedly mounted on the inner wall of the storage cavity at an upward inclination. A roller is installed on the upper inner side of the box door, and the roller is slidably supported on the support guide plate. The rotating rod is provided at the lower end of the box door. One end of the rotating rod rotates on the inner side wall of the box door, the middle part of the rotating rod is rotatably connected to the side wall of the storage cavity below the support guide plate, and the other end is connected to the upper end of the tension spring. The lower end of the tension spring is connected downward to the side wall of the storage cavity.

[0013] Preferably, a limiting baffle is fixedly provided along the upper edge of the opening of the box.

[0014] Preferably, the support guide plates are symmetrically fixed on the inner walls of both sides of the storage cavity, and two rollers are symmetrically installed on the upper inner side of the box, with the rollers rolling and supporting the corresponding support guide plates.

[0015] Preferably, two rotating rods are symmetrically arranged on both sides of the lower end of the box door.

[0016] Preferably, a sealing anti-collision ring is horizontally fixed to the inner edge of the top opening of the housing, and the sealing anti-collision ring abuts against the upper outer periphery of the detector body.

[0017] The beneficial effects of this invention are as follows: 1. The top of the detector body is connected to the opening of the housing via a sealing anti-collision ring, which can effectively absorb energy and prevent collisions, as well as provide an effective seal to prevent foreign objects from entering between the housing and the detector body.

[0018] 2. After the main body of the detector is installed in place, the shock-absorbing spring on the top of the mounting base can abut against the top of the mounting block; then, by adjusting the screw, the bolt is rotated so that the bolt pushes the transverse block to move horizontally in the transverse groove, and then the longitudinal block is pushed upward by the cooperation of the inclined surface, and the return spring is squeezed; during the upward movement of the longitudinal block, the limiting support arm will rotate and swing around its central rotating connection point, so that the outer end of the limiting support arm can swing downward and extend out of the side hole and press against the locking ring at the opening of the mounting groove, thereby locking the mounting block and the main body of the detector.

[0019] 3. This application, through the coordinated operation of a sealed anti-collision ring and a locking shock absorber, enables rapid alignment and mounting of the detector body, achieving a closed-loop protection system of integrated locking and full-area buffering and shock absorption. In all scenarios, including long-distance vehicle transport, on-site manual handling, outdoor bumpy movement, and high-altitude operations, it can comprehensively offset high-frequency vibrations, hard impacts, and lateral swaying forces, completely eliminating the problems of detector body loosening, displacement, and hard impact damage. It effectively protects the internal precision sampling chip, signal acquisition port, and core components of the main control circuit board, ensuring stable sampling accuracy of fault current, voltage, phase, and harmonics across all dimensions. This significantly extends the service life of the detector and reduces the overall cost of repairing and replacing power distribution maintenance equipment.

[0020] 4. When the cabinet door is closed, it is fixed to the cabinet opening by a locking structure. When using auxiliary tools, after opening the locking hook structure, the cabinet door is pushed upward. Under the elastic force of the tension spring, the rotating rod rotates and swings around the central rotating connection point. It is limited by the sliding support of the roller and the support guide plate, which allows the cabinet door to open upward and be stored in the top of the storage cavity. This enables the cabinet door to open and close quickly, making it more convenient to take out and put in the auxiliary tools in the storage cavity.

[0021] 5. During the opening process of the cabinet door, the door can be synchronously driven to flip upwards for opening and closing via a flip linkage. After opening, it directly fits snugly against the inner top of the storage cavity, concealing and storing the cabinet without occupying the surrounding work space on the outside of the cabinet. This avoids the problems of the door swinging outwards and scraping or bumping against the work flow in confined working conditions. Maintenance personnel can achieve smooth, effortless, and quick opening and closing of the cabinet door for concealed storage in restricted and complex working conditions such as high-altitude narrow positions, small interlayers of ring network cabinets, holding detectors with one hand, and temporary outdoor positions. There is no jamming or resistance, making the door opening operation more convenient and efficient. This adapts to the efficient work rhythm of emergency fault repair and short-term rapid verification, significantly reducing the labor intensity of on-site operations and improving the convenience of all-weather outdoor practical operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation of the fixed-lock shock absorber of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the installation of the flip linkage of the present invention. Detailed Implementation

[0023] 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.

[0024] like Figure 1-4As shown, this invention proposes a ground fault location testing device for distributed power distribution networks, including a housing 1 and a detector body 2. A cover 11 is hinged to the top opening of the housing 1. The cover 11 is connected to the housing 1 via a quick-release buckle. The detector body 2 is detachably installed inside the opening of the housing 1. Specifically, mounting blocks 21 are fixed at the four corners of the bottom of the detector body 2; a locking shock absorber that cooperates with the mounting blocks 21 is provided at the bottom of the opening of the housing 1. The bottom of the detector body 2 is connected to the housing 1 via the locking shock absorber, which can effectively absorb shock and energy. A sealing anti-collision ring 12 is horizontally fixed to the inner edge of the top opening of the housing 1, and the sealing anti-collision ring 12 abuts against the upper outer periphery of the detector body 2. The top of the detector body 2 is connected to the opening of the housing 1 via the sealing anti-collision ring 12, which can effectively absorb energy and prevent collisions, and also effectively seal the space between the housing 1 and the detector body 2.

[0025] The assembly block 21 has an assembly groove 211 at the bottom, and a locking ring 212 is provided along the inner edge of the lower opening of the assembly groove 211. The top of the fixed shock absorber is provided with a shock-absorbing spring 5, which abuts against the inner top of the assembly groove 211. The locking part of the fixed shock absorber cooperates with the locking ring 212. The fixed shock absorber includes a mounting base and a limiting arm 42. The mounting base is fixed to the bottom of the opening of the housing 1, and the shock-absorbing spring 5 is installed on the top of the mounting base. The mounting base has a vertical groove 401 in the middle, and a side hole 402 communicating with the vertical groove 401 is opened inward on the side wall of the mounting base. A longitudinal moving block 43 is vertically slidably installed in the vertical groove 401. The middle part of the limiting arm 42 is vertically rotatably installed in the side hole 402. The inner end of the limiting arm 42 is rotatably connected to the longitudinal moving block 43. The outer end of the limiting arm 42 extending out of the side hole 402 abuts against the locking ring 212. A return spring 41 is vertically abutting against the top of the vertical groove 401. The return spring 41 abuts against the top of the longitudinal moving block 43. A horizontal groove 403 communicating with the vertical groove 401 is horizontally opened on the lower side of the mounting base. A horizontal sliding block 44 is horizontally slidable in the horizontal groove 403. The inner end of the horizontal sliding block 44 and the bottom of the vertical sliding block 43 are respectively provided with mutually cooperating abutting inclined surfaces. One end of the screw 31 is horizontally rotatably connected to the outer end face of the horizontal sliding block 44. The other end of the screw 31 extends out of the horizontal groove 403 and is threaded through and extends out of the side wall of the housing 1. The end of the screw 31 extending out of the housing 1 is provided with an adjusting screw head 311. In this embodiment, the adjusting screw head 311 adopts a bolt head structure, which is convenient for using existing tools such as wrenches for screwing and adjustment.

[0026] After the main body 2 of the detector is installed in place, the shock-absorbing spring 5 on the top of the mounting base can abut against the top of the mounting block 21; then, by adjusting the screw 311, the bolt is rotated, so that the bolt pushes the transverse block 44 to move horizontally in the transverse groove 403, and then the longitudinal block 43 is pushed upward by the cooperation of the inclined surface, and the return spring 41 is squeezed; during the upward movement of the longitudinal block 43, the limiting support arm 42 will rotate and swing around its central rotating connection, so that the outer end of the limiting support arm 42 can swing downward and extend out of the side hole 402 and press against the locking ring 212 at the opening of the mounting groove 211, thereby locking the mounting block 21 and the main body 2 of the detector.

[0027] This application, through the coordinated operation of the sealing anti-collision ring 12 and the fixed-locking shock absorber, enables the rapid alignment and mounting of the detector body 2, achieving a closed-loop protection system of integrated fixed locking and full-area buffering and shock absorption. In all scenarios, including long-distance vehicle transport, on-site manual handling, outdoor bumpy movement, and high-altitude operations, it can comprehensively offset high-frequency vibrations, hard impacts, and lateral swaying forces, completely eliminating the problems of loosening or displacement of the detector body 2 and damage from hard impacts. It effectively protects the internal precision sampling chip, signal acquisition port, and core components of the main control circuit board, ensuring stable sampling accuracy of fault current, voltage, phase, and harmonics across all dimensions, significantly extending the service life of the detector and reducing the overall cost of repairing and replacing power distribution maintenance equipment.

[0028] The housing 1 below the main body 2 of the detector has a storage cavity 13, which is used to place detection auxiliary tools or wire harnesses and other detection tools. The front side wall of the housing 1 has a box opening 14 that connects to the storage cavity 13. A box door 16 is fitted at the box opening 14. A flip-up linkage connected to the box door 16 is installed inside the storage cavity 13. The box door 16 and the outer edge of the box opening 14 are connected by a locking structure (not shown in the figure). Specifically, the flip-over linkage includes a rotating rod 72 and a tension spring 73. The box door 16 is movably mounted at the box opening 14. Two support guide plates 15 are symmetrically fixed upwards on both sides of the inner wall of the storage cavity 13. Two rollers 71 are symmetrically installed on the upper inner side of the box door 16, and the two rollers 71 are slidably supported on the corresponding support guide plates 15. Two rotating rods 72 are symmetrically mounted on the lower end of the box door 16. One end of each rotating rod 72 rotates on the inner side wall of the box door 16, the middle part of the rotating rod 72 is rotatably connected to the side wall of the corresponding storage cavity 13 below the support guide plate 15, and the other end is connected to the upper end of the corresponding tension spring 73. The lower end of the tension spring 73 is connected downwards to the side wall of the corresponding storage cavity 13. A limiting baffle is fixedly provided along the upper edge of the opening of the box body 1, which effectively limits and seals the box door 16.

[0029] When the case door 16 is closed, it is fixed to the case opening 14 by a locking structure. When using auxiliary tools, after opening the locking hook structure, the case door 16 is pushed upward. Under the elastic force of the tension spring 73, the rotating rod 72 rotates and swings around the central rotating connection. It is limited by the sliding support of the roller 71 and the support guide plate 15, so that the case door 16 can be opened upward and stored in the inner top of the storage cavity 13. This realizes the quick opening and closing of the case door 16, and makes it more convenient to take out and put in the auxiliary tools in the storage cavity 13.

[0030] During the opening process of the cabinet door 16, the door can be synchronously driven to flip upwards to open and close, relying on the flip linkage. After opening, it can be directly and hiddenly placed inside the storage cavity 13, without occupying the surrounding work space of the cabinet body 1. This avoids the problem of the cabinet door 16 swinging outwards and scraping or bumping and obstructing the work flow in confined working conditions. Maintenance personnel can smoothly and effortlessly open and close the cabinet door 16 and hide it quickly with one button in confined and complex working conditions such as high-altitude narrow positions, narrow interlayers of ring network cabinets, holding detectors with one hand, and temporary outdoor positions. There is no jamming or resistance, making the opening operation more convenient and efficient. It is suitable for the efficient work rhythm of emergency fault repair and short-term rapid verification, greatly reducing the labor intensity of on-site operations and improving the convenience of all-weather outdoor operation.

[0031] 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 ground fault location testing device for distributed power generation distribution networks, comprising a housing and a detector body, characterized in that: A lid is hinged to the top opening of the housing; the detector body is detachably installed inside the opening of the housing; assembly blocks are fixed at the four corners of the bottom of the detector body; a locking shock absorber that cooperates with the assembly blocks is provided at the bottom of the opening of the housing; a storage cavity is provided inside the housing below the detector body for placing testing auxiliary tools or wire harnesses; a door is provided on the side wall of the housing for connecting the storage cavity; a flip-up linkage connected to the door is installed inside the storage cavity; the door and the outer edge of the door are connected by a locking structure.

2. The distributed power generation distribution network grounding fault location test device according to claim 1, characterized in that: The bottom of the assembly block has an upward-facing assembly groove, and a locking ring is provided along the inner edge of the lower opening of the assembly groove; the top of the fixed-lock shock absorber is vertically provided with a shock-absorbing spring, which abuts against the inner top of the assembly groove; the locking part of the fixed-lock shock absorber cooperates with the locking ring.

3. The distributed power generation distribution network grounding fault location test device according to claim 2, characterized in that: The fixed-lock shock absorber includes a mounting base and a limiting arm. The mounting base is fixed to the bottom of the housing opening, and the shock-absorbing spring is installed on the top of the mounting base. A vertical groove is provided in the middle of the mounting base, and a side hole communicating with the vertical groove is opened inward on the side wall of the mounting base. A longitudinal moving block is vertically slidably provided in the vertical groove. The middle part of the limiting arm is vertically rotatably installed in the side hole, and the inner end of the limiting arm is rotatably connected to the longitudinal moving block. The outer end of the limiting arm extending out of the side hole abuts against the locking ring. A horizontal groove communicating with the vertical groove is opened on the lower side of the mounting base, and a horizontal moving block is horizontally slidably provided in the horizontal groove. The inner end of the horizontal moving block and the bottom of the longitudinal moving block are respectively provided with mutually cooperating abutting inclined surfaces. One end of a screw is horizontally rotatably connected to the outer end face of the horizontal moving block, and the other end of the screw extends out of the horizontal groove and is threaded through and extends out of the side wall of the housing.

4. The distributed power generation distribution network grounding fault location test device according to claim 3, characterized in that: The end of the screw extending out of the housing is provided with an adjusting screw mechanism.

5. The distributed power generation distribution network grounding fault location test device according to claim 3, characterized in that: A return spring is vertically abutting the top of the vertical groove, and the return spring abuts against the top of the longitudinal moving block.

6. The distributed power generation distribution network grounding fault location test device according to claim 1, characterized in that: The flipping linkage includes a rotating rod and a tension spring. The box door is movably located at the box opening. A support guide plate is fixedly installed on the inner wall of the storage cavity at an upward angle. A roller is installed on the upper inner side of the box door, and the roller slides and is supported on the support guide plate. The rotating rod is located at the lower end of the box door. One end of the rotating rod rotates on the inner side wall of the box door, the middle part of the rotating rod is rotatably connected to the side wall of the storage cavity below the support guide plate, and the other end is connected to the upper end of the tension spring. The lower end of the tension spring is connected downward to the side wall of the storage cavity.

7. The distributed power generation distribution network grounding fault location test device according to claim 6, characterized in that: A limiting baffle is fixedly provided along the upper edge of the opening of the box.

8. The distributed power generation distribution network grounding fault location test device according to claim 6, characterized in that: The support guide plates are symmetrically fixed on the inner walls of both sides of the storage cavity, and two rollers are symmetrically installed on the upper inner side of the box, with the rollers rolling and supporting the corresponding support guide plates.

9. The distributed power generation distribution network grounding fault location test device according to claim 6, characterized in that: Two rotating rods are symmetrically arranged on both sides of the lower end of the box door.

10. The distributed power generation distribution network grounding fault location test device according to claim 1, characterized in that: A sealing anti-collision ring is horizontally fixed to the inner edge of the opening at the top of the box, and the sealing anti-collision ring abuts against the upper outer periphery of the detector body.

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