Low-voltage grounding electric leakage checking device
By designing a low-voltage ground leakage detection device including a clamp current transformer mechanism and a low-voltage leakage detection auxiliary mechanism, the accuracy, adaptability and safety problems of the existing low-voltage line detection methods are solved, and efficient and accurate leakage detection and analysis are achieved.
Patent Information
- Application Number
- CN202411711806.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-04-15
AI Technical Summary
The existing low-voltage line detection methods have problems such as insufficient measurement accuracy, poor adaptability, low working efficiency and safety hazards, making it difficult to effectively detect leakage in rural low-voltage distribution networks.
A low-voltage ground leakage detection device is designed, including a clamp current transformer mechanism and a low-voltage leakage detection auxiliary mechanism. Through the telescopic insulated support rod sleeve assembly and data processing program, vector data acquisition and real-time analysis of 1 to 4 currents are realized.
It improves the accuracy and working efficiency of leakage detection, enhances the safety of operation, can effectively adapt to the detection of large line diameters and long-distance phase lines, and ensures the stability and power supply safety of rural low-voltage distribution networks.
Smart Images
Figure CN119828039A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of low-voltage line detection, and in particular to a low-voltage grounding leakage detection device. Background Art
[0002] With the widespread development of rural power grids, low-voltage distribution networks are facing leakage problems caused by humid environments. Especially in the southern region, due to the humid weather, the insulation layer of low-voltage lines is prone to oxidation and damage, causing leakage. This leakage not only reduces the safety of the power system, but also poses a threat to the safety of related equipment and users.
[0003] At present, in rural power distribution systems, the commonly used troubleshooting methods mainly include on-site manual detection with clamp ammeters. This method relies on manual inspections by technicians. Although it is effective in some cases, it also has many defects. For example, the measurement accuracy is insufficient: the existing ordinary clamp ammeters have low accuracy when measuring large wire diameter currents, and it is difficult to ensure accurate leakage current detection; poor adaptability: for lines with long phase line arrangement distances, the measurement position selection of clamp ammeters is limited, and it is impossible to fully evaluate the leakage situation; low work efficiency: the efficiency of manual inspections is low, especially in complex geographical environments, it is easy to miss leakage points, resulting in increased potential risks of leakage phenomena; safety hazards: when working in a humid environment, personnel and equipment face additional safety risks. Therefore, there is an urgent need for a new type of low-voltage grounding leakage troubleshooting device to improve the accuracy, convenience and work efficiency of leakage detection. Summary of the invention
[0004] In view of the above shortcomings, the present invention provides a low-voltage grounding leakage detection device, which can overcome the problems existing in the background technology and provide a leakage detection device with high accuracy, high working efficiency, high operating safety and convenience. The specific technical solution is as follows:
[0005] A low-voltage ground leakage detection device, comprising a clamp-type current transformer mechanism and a low-voltage leakage detection auxiliary mechanism electrically connected to the clamp-type current transformer mechanism through a cable;
[0006] A retractable insulating support rod sleeve assembly is installed on the clamp-on current transformer mechanism, and the retractable insulating support rod sleeve assembly is sleeved on the outside of the cable. The retractable insulating support rod sleeve assembly is held to clamp the clamp-on current transformer mechanism to the line, and the leakage condition of the line is analyzed and processed through the low-voltage leakage detection auxiliary mechanism.
[0007] Preferably, the clamp-type current transformer mechanism includes a mounting shell, a fixed clamp body, a movable clamp body, a driving wrench, a rotating shaft and a transformer assembly, wherein the transformer assembly is mounted inside the mounting shell, the fixed clamp body is fixedly mounted at the end of the mounting shell, the movable clamp body and the driving wrench are an integrated structure, and the integrated structure consisting of the movable clamp body and the driving wrench is rotatably mounted on the mounting shell via the rotating shaft, and in a closed state, the movable clamp body and the fixed clamp body form a closed loop, a coil is wound around the inner section of the fixed clamp body, the fixed clamp body is electrically connected to the transformer assembly via a wire, and the transformer assembly is electrically connected to the low-voltage leakage detection auxiliary mechanism via the cable.
[0008] Preferably, the cable is connected from the installation housing and is electrically connected to the low-voltage leakage detection auxiliary mechanism.
[0009] Preferably, the retractable insulating support rod sleeve assembly is installed on the mounting shell and is sleeved on the outside of the cable. The retractable insulating support rod sleeve assembly includes a fixed rod sleeve, a telescopic rod sleeve, a rubber grip layer and an elastic adjustment key. The fixed rod sleeve is adjustably rotatably mounted on the end of the mounting shell through a hinge joint. The telescopic rod sleeve is slidably sleeved on the fixed rod sleeve. An adjustment hole is opened on either the fixed rod sleeve or the telescopic rod sleeve, and the elastic adjustment key is installed on the other. The elastic adjustment key is clamped in the adjustment hole, and the rubber grip layer is installed on the telescopic rod sleeve.
[0010] Preferably, a ring is provided on the fixed rod sleeve, a driving rope is led out from the driving wrench, the driving rope passes through the ring and is slidably installed on the telescopic rod sleeve through a sliding insulating driving sleeve, and the sliding insulating driving sleeve is slid to drive the rotation and opening and closing of the movable pliers body.
[0011] Preferably, a return spring is provided on the rotating shaft.
[0012] Preferably, the low-voltage leakage detection auxiliary mechanism includes a host housing, a control module, a data display screen, function buttons and an output socket. The control module is installed inside the host housing, and the data display screen, function buttons and the output socket are installed on the host housing. One end of the cable is connected to the mutual inductor assembly, and the other end is connected to the output socket. The control module, data display screen, function buttons and the output socket are electrically connected.
[0013] Preferably, four output sockets are provided on the host housing.
[0014] Preferably, the output socket adopts an audio plug.
[0015] Preferably, a multifunctional hook is also provided on the main housing.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. The present invention provides a low-voltage grounding leakage detection device, which can support the vector data collection of 1 to 4 currents through the coordinated use of a clamp-type current transformer mechanism and a low-voltage leakage detection auxiliary mechanism, can read the current vector value in real time, and calculate the unbalanced vector value of multiple currents in the device, analyze and detect the leakage of the line. Improve the work efficiency of the investigation and ensure the stability and power supply safety of the rural low-voltage distribution network.
[0018] 2. The clamp-on current transformer mechanism in the leakage detection device provided by the present invention is also provided with a retractable insulating support rod sleeve assembly, and the extension length of the retractable insulating support rod sleeve assembly can be adjusted to facilitate the operator to hook the clamp-on current transformer mechanism to a high / distant wire, thereby solving the problem that the existing clamp-on ammeter cannot effectively adapt to the detection of large wire diameters and long-distance phase lines, and the potential safety hazards encountered during manual operations, and further improving the accuracy, convenience, safety and work efficiency of leakage detection.
[0019] 3. The leakage detection device provided by the present invention is designed to be light and flexible, beautiful and easy to carry, which solves the problem that traditional equipment is bulky and difficult to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.
[0021] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;
[0022] Figure 2 It is a schematic diagram of the structure of the clamp-on current transformer in the present invention;
[0023] Figure 3 It is a schematic diagram of the structure of the low-voltage leakage troubleshooting auxiliary mechanism in the present invention.
[0024] 100-clamp-on current transformer mechanism, 110-installation housing, 120-fixed clamp body, 130-movable clamp body, 140-drive wrench, 141-drive rope, 142-sliding insulating drive sleeve, 200-cable, 300-low-voltage leakage detection auxiliary mechanism, 310-host housing, 311-multi-function hook, 320-data display screen, 330-function button, 340-output socket, 400-retractable insulating support rod sleeve assembly, 410-fixed rod sleeve, 411-adjustment hole, 412-ring, 420-retractable rod sleeve, 430-rubber grip layer, 440-elastic adjustment key. DETAILED DESCRIPTION
[0025] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0027] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0029] Example
[0030] like Figures 1 to 3 As shown, a low-voltage ground leakage detection device provided by an embodiment of the present invention includes a clamp-type current transformer mechanism 100 and a low-voltage leakage detection auxiliary mechanism 300 electrically connected to the clamp-type current transformer mechanism 100 through a cable 200. During detection, the clamp-type current transformer mechanism 100 is matched with a single line one by one, that is, each clamp-type current transformer mechanism 100 can only measure the current of one phase conductor at a time, and the side conductor should be placed in the center of the clamp window, and multi-phase conductors cannot be clamped into the window for testing (the clamp is placed in the center of the clamp window). The clamp-type current transformer mechanism 100 is clamped on a corresponding detection wire). It is worth mentioning that the clamp-type current transformer mechanism 100 adopts high-quality materials and electromagnetic shielding structure design, which improves the anti-electromagnetic interference ability and ensures the measurement accuracy and stability in complex current environments. The low-voltage leakage detection auxiliary mechanism 300 can accurately measure the AC current in the range of 0.01A to 750A, with a rated working voltage of 0.5KV, an operating frequency of 45HZ to 100KHZ, and a readiness of 0.2 level. This design ensures the adaptability to large-diameter wires;
[0031] The clamp-on current transformer mechanism 100 is equipped with a retractable insulating support rod sleeve assembly 400, which is sleeved on the outside of the cable 200. The retractable insulating support rod sleeve assembly 400 is held to clamp the clamp-on current transformer mechanism 100 to the line, and the leakage condition of the line is analyzed and processed through the low-voltage leakage detection auxiliary mechanism 300. The low-voltage leakage detection auxiliary mechanism 300 has a powerful anti-interference data processing program.
[0032] Preferably, the clamp-type current transformer mechanism 100 includes an installation shell 110, a fixed clamp body 120, a movable clamp body 130, a driving wrench 140, a rotating shaft and a transformer assembly, wherein the transformer assembly is installed inside the installation shell 110, the fixed clamp body 120 is fixedly installed at the end of the installation shell 110, the movable clamp body 130 and the driving wrench 140 are an integrated structure, and the integrated structure composed of the movable clamp body 130 and the driving wrench 140 is rotatably installed on the installation shell 110 through the rotating shaft. In the closed state, the movable clamp body 130 and the fixed clamp body 120 form a closed loop, a coil is wound around the internal section of the fixed clamp body 120, the fixed clamp body 120 is electrically connected to the transformer assembly through a wire, and the transformer assembly is electrically connected to the low-voltage leakage detection auxiliary mechanism 300 through the cable 200. The cable 200 is connected from the installation housing 110 and is electrically connected to the low-voltage leakage detection auxiliary mechanism 300. When detecting the line, the line is placed in a ring formed by the movable clamp body 130 and the fixed clamp body 120, and the leakage condition of the line is detected through the mutual inductor assembly.
[0033] In some preferred embodiments, the retractable insulating support rod sleeve assembly 400 is installed on the installation shell 110 and sleeved on the outside of the cable 200. The retractable insulating support rod sleeve assembly 400 includes a fixed rod sleeve 410, a telescopic rod sleeve 420, a rubber grip layer 430 and an elastic adjustment key 440. The fixed rod sleeve 410 is rotatably installed at the end of the installation shell 110 through a hinge joint. The telescopic rod sleeve 420 is slidably sleeved on the fixed rod sleeve 410. An adjustment hole 410 is opened on either the fixed rod sleeve 410 or the telescopic rod sleeve 420. 1, and the elastic adjustment key 440 is installed on the other, and the elastic adjustment key 440 is clamped in the adjustment hole 411. The rubber grip layer 430 is installed on the telescopic rod sleeve 420, and the extended length is adjusted by the telescopic insulating support rod sleeve assembly 400, so that the operator can hook the clamp current transformer mechanism 100 to the high / distant wire, which solves the problem that the existing clamp ammeter cannot effectively adapt to the detection of large wire diameters and long-distance phase lines, and the potential safety hazards faced during manual operations, and further improves the accuracy, convenience, safety and work efficiency of leakage detection.
[0034] Furthermore, a ring 412 is provided on the fixed rod sleeve 410, and a driving rope 141 is led out from the driving wrench 140. The driving rope 141 passes through the ring 412 and is slidably installed on the telescopic rod sleeve 420 through a sliding insulating driving sleeve 142. It is worth mentioning that a reset spring is provided on the rotating shaft. The movable pliers 130 is driven to rotate and open and close by sliding the sliding insulating driving sleeve 142, or the movable pliers 130 is driven to rotate and open and close by pressing the driving wrench 140. Controlling the opening and closing action of the movable pliers 130 by the driving rope 141 can extend the operating distance, expand the detection range, and improve the safety during the detection process.
[0035] Preferably, the low-voltage leakage detection auxiliary mechanism 300 includes a main housing 310, a control module, a data display screen 320, a function button 330 and an output socket 340. The control module is installed inside the main housing 310, and the data display screen 320, the function button 330 and the output socket 340 are installed on the main housing 310. One end of the cable 200 is connected to the mutual inductor assembly, and the other end is connected to the output socket 340. The control module, the data display screen 320, the function button 330 and the output socket 340 are electrically connected.
[0036] In some preferred embodiments, four output sockets 340 are provided on the host housing 310, and the low-voltage leakage detection auxiliary mechanism 300 supports vector data acquisition of 1 to 4 currents, can read the current vector value in real time, and calculate the unbalanced vector value of multiple currents in the device. The low-voltage leakage detection auxiliary mechanism 300 relies on high stability to ensure that the accuracy of data acquisition reaches 0.2S level, overcoming the problem of data instability caused by electromagnetic interference in previous equipment.
[0037] In some preferred embodiments, the output socket 340 uses an audio plug and is equipped with transformers of different colors for easy identification and connection.
[0038] In some preferred embodiments, a multifunctional hook 311 is further provided on the main housing 310. The multifunctional hook 311 makes the whole device beautiful and easy to carry, thus solving the problem that the traditional equipment is bulky and difficult to operate.
[0039] Through the comprehensive application of the above-mentioned technical means, the efficiency and accuracy of leakage fault detection have been greatly improved, meeting the safe operation requirements of rural low-voltage distribution networks.
[0040] In summary, the present invention provides a low-voltage grounding leakage detection device, which can support the vector data collection of 1 to 4 currents through the coordinated use of a clamp current transformer mechanism and a low-voltage leakage detection auxiliary mechanism, can read the current vector value in real time, and calculate the unbalanced vector value of multiple currents in the device, and analyze and check the leakage of the line. Improve the work efficiency of the inspection, ensure the stability and power supply safety of the rural low-voltage distribution network; the clamp current transformer mechanism in the leakage detection device provided by the present invention is also provided with a retractable insulating support rod sleeve assembly, which can be adjusted by adjusting the extension length of the retractable insulating support rod sleeve assembly so that the operator can hook the clamp current transformer mechanism to the high / distant wire, solve the problem that the existing clamp current meter cannot effectively adapt to the detection of large wire diameters and long-distance phase lines, and the safety hazards faced during manual operations, and further improve the accuracy, convenience, safety and work efficiency of leakage detection; the leakage detection device provided by the present invention is designed to be light and flexible, beautiful and easy to carry, and solves the problem that traditional equipment is bulky and difficult to operate.
[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. Low voltage ground leakage detection device, characterized in that: It comprises a clamp-type current transformer mechanism (100) and a low-voltage leakage detection auxiliary mechanism (300) electrically connected to the clamp-type current transformer mechanism (100) via a cable (200); A retractable insulating support rod sleeve assembly (400) is installed on the clamp-on current transformer mechanism (100), and the retractable insulating support rod sleeve assembly (400) is sleeved on the outside of the cable (200). The retractable insulating support rod sleeve assembly (400) is held to clamp the clamp-on current transformer mechanism (100) onto the line, and the leakage condition of the line is analyzed and processed through the low-voltage leakage detection auxiliary mechanism (300).
2. The low-voltage ground leakage detection device according to claim 1 is characterized in that: The clamp-on current transformer mechanism (100) comprises a mounting housing (110), a fixed clamp body (120), a movable clamp body (130), a driving wrench (140), a rotating shaft and a transformer assembly, wherein the transformer assembly is mounted inside the mounting housing (110), the fixed clamp body (120) is fixedly mounted at the end of the mounting housing (110), the movable clamp body (130) and the driving wrench (140) are of an integrated structure, and the movable clamp body (130) and the driving wrench (140) are connected to the mounting housing (110). The integrated structure composed of the driving wrench (140) is rotatably mounted on the mounting housing (110) via the rotating shaft. In a closed state, the movable clamp body (130) and the fixed clamp body (120) form a closed loop. A coil is wound around the inner section of the fixed clamp body (120). The fixed clamp body (120) is electrically connected to the mutual inductor assembly via a wire. The mutual inductor assembly is electrically connected to the low-voltage leakage detection auxiliary mechanism (300) via the cable (200).
3. The low voltage ground leakage detection device according to claim 2 is characterized in that: The cable (200) is connected from the installation housing (110) and is electrically connected to the low-voltage leakage detection auxiliary mechanism (300).
4. The low-voltage ground leakage detection device according to claim 2 is characterized in that: The retractable insulating support rod sleeve assembly (400) is installed on the installation shell (110) and sleeved on the outside of the cable (200). The retractable insulating support rod sleeve assembly (400) includes a fixed rod sleeve (410), a telescopic rod sleeve (420), a rubber gripping layer (430) and an elastic adjustment key (440). The fixed rod sleeve (410) is rotatably installed on the end of the installation shell (110) through a hinge joint. The telescopic rod sleeve (420) is slidably sleeved on the fixed rod sleeve (410). An adjustment hole (411) is opened on either the fixed rod sleeve (410) or the telescopic rod sleeve (420), and the elastic adjustment key (440) is installed on the other. The elastic adjustment key (440) is clamped in the adjustment hole (411). The rubber gripping layer (430) is installed on the telescopic rod sleeve (420).
5. The low-voltage ground leakage detection device according to claim 4 is characterized in that: The fixed rod sleeve (410) is provided with a ring (412), a driving rope (141) is led out from the driving wrench (140), the driving rope (141) passes through the ring (412) and is slidably installed on the telescopic rod sleeve (420) through a sliding insulating driving sleeve (142), and the sliding insulating driving sleeve (142) is slid to drive the movable pliers (130) to rotate and open and close.
6. The low-voltage ground leakage detection device according to claim 2, characterized in that: A return spring is arranged on the rotating shaft.
7. The low voltage ground leakage detection device according to claim 2, characterized in that: The low-voltage leakage detection auxiliary mechanism (300) comprises a main body housing (310), a control module, a data display screen (320), a function button (330) and an output socket (340); the control module is installed inside the main body housing (310); the data display screen (320), the function button (330) and the output socket (340) are installed on the main body housing (310); one end of the cable (200) is connected to the mutual inductor assembly, and the other end is connected to the output socket (340); the control module, the data display screen (320), the function button (330) and the output socket (340) are electrically connected.
8. The low-voltage ground leakage detection device according to claim 7, characterized in that: The host housing (310) is provided with four output sockets (340).
9. The low-voltage ground leakage detection device according to claim 7, characterized in that: The output socket (340) adopts an audio plug.
10. The low voltage ground leakage detection device according to claim 7, characterized in that: The host housing (310) is also provided with a multifunctional hook (311).