Electric leakage detection device

Abstract

The utility model discloses an electric leakage detection device which comprises a base, an oscilloscope, a supporting rod and a detection head. The oscilloscope and the supporting rod are both arranged on the base, and the detection head is connected to the supporting rod; the mounting plate is connected with the supporting rod, the insulating rod is connected with the mounting plate, the fixing seat is connected with the insulating rod, and the bidirectional screw rod is rotationally connected with the fixing seat; the induction coil is divided into two parts which are respectively arranged in the two coil clamps, and the induction coil is connected with the oscilloscope through a lead; the insulating blocks are fixedly connected to the bottom of the coil clamp, the insulating blocks are arranged on the base in a sliding mode and connected to the two sides of the bidirectional lead screw in a threaded mode, and the driving device is connected with the bidirectional lead screw and used for driving the bidirectional lead screw to rotate. Through the design of the driving device, the bidirectional screw rod and the coil clamp, the induction coil can be conveniently sleeved on the outer side of a line to be detected, so that the detection efficiency is improved, and the safety of electric leakage detection is also improved.

Description

Technical Field

[0001] This utility model belongs to the field of power detection technology, specifically a leakage current detection device. Background Technology

[0002] In the daily work of power distribution operation and maintenance, leakage current detection in low-voltage distribution areas is crucial. Leakage current detection is primarily for safety, as leakage can lead to electric shock accidents, especially in humid environments. Regular detection ensures the safe operation of power facilities and reduces the risk of electric shock. Simultaneously, leakage can damage electrical equipment, causing equipment failure or shortening its lifespan. Detection helps to identify problems promptly and protect equipment. Regular leakage current detection helps power companies and management departments to keep abreast of equipment operating status, optimize maintenance plans, and improve management efficiency.

[0003] In existing technologies, leakage current detection for phase lines is typically performed using clamp-on ammeters. In urban areas, wiring is easily managed centrally, allowing for routine testing at relatively safe locations. However, in rural areas, low-voltage phase lines are usually mounted on utility poles, inevitably requiring workers to perform leakage current detection at heights, which is time-consuming, labor-intensive, and relatively inefficient.

[0004] A leakage current detection device is disclosed in patent CN117471361A. This device includes an insulating rod assembly, a mounting plate, a detection component, a triggering component, a driving component, and a data acquisition mechanism. The mounting plate is fixedly mounted on the top of the insulating rod assembly. This leakage current detection device can detect leakage current in high-level phase wires through the data acquisition mechanism at the top. However, the detection head of this leakage current detection device is controlled to open and close by a sliding plate. The sliding plate controls the detection head through friction, which leads to the problem that the sliding plate is not easy to control the detection head, resulting in time-consuming, labor-intensive, and inefficient leakage current detection. Utility Model Content

[0005] The purpose of this invention is to provide a leakage current detection device to solve the following technical problems mentioned in the background art:

[0006] The process of troubleshooting leakage current requires staff to frequently work at heights, which is time-consuming and labor-intensive, and the detection efficiency is relatively low.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A leakage current detection device includes a base, an oscilloscope, a support rod, and a detection head; the oscilloscope and the support rod are both mounted on the base, and the detection head is connected to the support rod.

[0009] The detection head includes a mounting plate, an insulating rod, an insulating block, a fixing base, a coil clamp, an induction coil, a bidirectional lead screw, and a drive device.

[0010] The mounting plate is connected to the support rod, the insulating rod is connected to the mounting plate, the fixed base is connected to the insulating rod, and the bidirectional lead screw is rotatably connected to the fixed base. The induction coil is split into two and set in two coil clamps respectively. The induction coil is connected to the oscilloscope through wires. The insulating block is fixed to the bottom of the coil clamp, the insulating block is slidably set on the base and the insulating block is threaded to both sides of the bidirectional lead screw. The drive device is connected to the bidirectional lead screw and is used to drive the bidirectional lead screw to rotate.

[0011] Furthermore, the support rod is a telescopic rod, which includes an inner rod and an outer rod. The inner rod is movably connected inside the outer rod, and the inner rod and the outer rod are fixed together by bolts.

[0012] Furthermore, the mounting plate is evenly spaced with four detection heads.

[0013] Furthermore, the mounting plate is provided with an adjustment groove, the bottom of the insulating rod is fixedly connected to the mounting rod, the outer side of the mounting rod is provided with external threads and an adjustment nut is threadedly connected, the mounting rod is movably connected in the adjustment groove, the bottom of the mounting rod expands outward and abuts against the bottom of the mounting plate, and the adjustment nut is used to lock the mounting rod on the mounting plate.

[0014] Furthermore, the drive device includes a control motor and a gear set. The control motor is fixedly connected to the fixed base. The output shaft of the control motor is fixedly connected to the drive gear, and one side of the bidirectional lead screw is fixedly connected to the driven gear. The drive gear and the driven gear mesh.

[0015] Furthermore, a guide rod is fixed to the top of the coil clamp, and the guide rod is symmetrically and obliquely arranged on the two coil clamps.

[0016] Furthermore, limit plates are provided on both sides of the fixed base.

[0017] Furthermore, a limiting beam is fixedly connected to the middle of the fixing base, and a groove is provided at the bottom of the insulating block, which cooperates with the limiting beam.

[0018] Furthermore, the front and rear sides of the fixing base are provided with sliding grooves, and the bottom of the insulating block is slidably connected in the sliding grooves.

[0019] Furthermore, connectors are fixed to both sides of the induction coil, and the connectors are connected to wires.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The design of the support rod and detection head in this invention eliminates the need for workers to climb to high places or approach high-voltage lines, reducing safety risks such as electric shock and falls. The combination of induction coils effectively captures minute leakage currents, improving the sensitivity of leakage detection and ensuring timely detection of potential problems. The design of the drive device, bidirectional lead screw, and coil clamp allows for easy placement of the induction coil on the outside of the line to be tested, thereby improving detection efficiency and the safety of leakage detection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a front view of the detection head of this utility model;

[0024] Figure 3 This is a partial view of the detection head of this utility model;

[0025] Figure 4 This is a schematic diagram of the usage state of this utility model;

[0026] Figure 5 This is a schematic diagram of the induction coil structure of this utility model.

[0027] The markings in the diagram are: 1-base, 2-support rod, 3-detection head, 4-wire, 5-oscilloscope, 6-guide rod, 7-coil clamp, 8-connector, 9-insulating block, 10-fixed seat, 11-double-acting lead screw, 12-insulating rod, 13-mounting plate, 14-adjusting nut, 15-mounting rod, 16-control motor, 17-induction coil, 18-limiting beam, 19-limiting plate, 20-driven gear, 21-driving gear, 22-adjusting groove, 23-slide groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example:

[0030] A leakage current detection device includes a base, an oscilloscope, a support rod, and a detection head; the oscilloscope and the support rod are both mounted on the base, and the detection head is connected to the support rod; the base is used to provide stable support for the support rod and the oscilloscope, and the detection head is used to detect whether the circuit is leaking current.

[0031] The detection head includes a mounting plate, an insulating rod, an insulating block, a fixing base, a coil clamp, an induction coil, a bidirectional lead screw, and a drive device.

[0032] The mounting plate is connected to the support rod, the insulating rod is connected to the mounting plate, the fixed base is connected to the insulating rod, and the bidirectional lead screw is rotatably connected to the fixed base. The induction coil is split in two and placed in two coil clamps respectively. The induction coil is connected to the oscilloscope via wires. The insulating block is fixed to the bottom of the coil clamp, slides on the base, and is threaded to both sides of the bidirectional lead screw. The drive device is connected to the bidirectional lead screw and is used to drive the bidirectional lead screw to rotate. When the bidirectional lead screw rotates, it causes the insulating blocks on the fixed base to move closer together, which in turn causes the coil clamps to move closer together. After the coil clamps move closer together and make contact, the induction coils inside the coil clamps merge together to form a complete coil, which can detect leakage current. It should be noted that the oscilloscope is connected to the induction coil via wires. The induction coil is placed around the circuit to be tested. If there is current flowing in the circuit being tested, the induction coil generates an induced current, which is transmitted to the oscilloscope through the wires. The oscilloscope fits the acquired current waveform. When no leakage occurs in multiple groups of tested circuits, the current waveform signals of multiple groups of circuits are fitted into an approximate straight line. If the fitted waveform deviates too far from the straight line, it indicates that at least one or more lines have a leakage.

[0033] In use, the leakage current detection device is moved under the line to be tested, a support rod is erected, and its position is adjusted so that the line enters the coil clamp. The support rod is then fixed in place. The control drive device rotates the bidirectional lead screw, which in turn moves the insulating blocks closer together. The insulating blocks then move the coil clamps closer together, causing the induction coils to assemble as a single unit. The induction coil generates an induced current, which is transmitted through wires to an oscilloscope, allowing observation of whether leakage has occurred in the line. After testing, the drive device rotates the bidirectional lead screw again, moving the insulating blocks away from each other. The insulating blocks then move the coil clamps away from each other, allowing the coil clamps to open and the line to be removed from the coil clamps. This design allows workers to conveniently test for leakage in different locations without requiring them to work at heights. It offers advantages in terms of safety and convenience, effectively improving testing efficiency.

[0034] In a preferred embodiment, the support rod is a telescopic rod, comprising an inner rod and an outer rod. The inner rod is movably connected inside the outer rod, and the inner and outer rods are fixed together by bolts. Specifically, during use, the length of the support rod is adjusted according to the height of the line being tested. Specifically, the bolts are loosened, the inner rod is pulled out from inside the outer rod, the height is adjusted, and then the inner rod and outer rod are fixed together with bolts. Adjusting the length of the support rod increases the applicability of this invention and facilitates leakage current detection of lines at different heights.

[0035] In a preferred embodiment, the mounting plate is provided with four detection heads at even intervals. Having four detection heads allows for convenient simultaneous testing of a three-phase four-wire system, thereby improving testing efficiency.

[0036] In a preferred embodiment, the mounting plate has an adjustment groove. The bottom of the insulating rod is fixedly connected to a mounting rod. The outer side of the mounting rod has external threads and is threaded with an adjusting nut. The mounting rod is movably connected within the adjustment groove, with its bottom expanding outwards and abutting against the bottom of the mounting plate. The adjusting nut is used to lock the mounting rod onto the mounting plate. The adjustment groove facilitates adjustment of the detection head's position. When adjustment is needed, rotating the adjusting nut loosens it, moving the mounting rod. The mounting rod then moves the insulating rod, thereby moving the entire detection head. After adjustment, tightening the adjusting nut fixes the mounting rod to the mounting plate, thus fixing the detection head to the mounting plate. This design allows for fine-tuning of the detection head's position, facilitating leakage current detection of the circuit.

[0037] In a preferred embodiment, the drive device includes a control motor and a gear set. The control motor is fixedly connected to a fixed base, and a driving gear is fixedly connected to the output shaft of the control motor. A driven gear is fixedly connected to one side of the bidirectional lead screw, and the driving gear meshes with the driven gear. Preferably, the control motor is a servo motor, and the servo motor is paired with a microcontroller and a communication module to achieve remote control. The servo motor has the advantages of high-precision control and fast response, enabling convenient and rapid control of the bidirectional lead screw.

[0038] In a preferred embodiment, a guide rod is fixed to the top of the coil clamp, and the guide rod is symmetrically and obliquely arranged on the two coil clamps. The guide rod is used to guide the circuit into the coil clamp, which can improve the detection efficiency. Specifically, the guide rods on both sides are inclined outward. During detection, the circuit first enters between the guide rods. When the detection head is pushed upward, the circuit contacts the guide rod and is guided into the coil clamp, thereby facilitating the detection of the current of the circuit by the induction coil.

[0039] In a preferred embodiment, limiting plates are provided on both sides of the fixing base. The limiting plates are used to limit the movement range of the insulating block, prevent the insulating block from detaching from the fixing base, and ensure the normal operation of the detection head.

[0040] In a preferred embodiment, a limiting beam is fixedly connected to the center of the fixing base, and a groove is provided at the bottom of the insulating block, which engages with the limiting beam. The limiting beam ensures the stability of the insulating block during movement. Because the bottom of the insulating block has a groove, and the groove engages with the limiting beam, the limiting beam prevents the insulating block from wobbling back and forth during movement. This allows the coil clamps to move stably and connect together, and also allows the two induction coils to be stably connected together.

[0041] In a preferred embodiment, the front and rear sides of the fixing base are provided with sliding grooves, and the bottom of the insulating block is slidably connected within the sliding grooves. Similarly, the sliding grooves are also to ensure the stability of the movement of the insulating block and prevent the induction coil from failing to conduct when the coil clamp makes contact.

[0042] In a preferred embodiment, connectors are fixed to both sides of the induction coil, and these connectors are connected to wires. The connectors facilitate the connection of the induction coil to the wires. Specifically, the induction coil is housed inside a coil clamp, and the connectors extend outside the clamp. The coil clamp is primarily designed to prevent the split induction coil from separating; therefore, the induction coil is preferably fixed inside the clamp, and the connectors facilitate the connection between the induction coil and the wires.

[0043] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leakage current detection device, characterized in that: It includes a base, an oscilloscope, a support rod, and a test head; the oscilloscope and the support rod are both mounted on the base, and the test head is connected to the support rod. The detection head includes a mounting plate, an insulating rod, an insulating block, a fixing base, a coil clamp, an induction coil, a bidirectional lead screw, and a drive device; The mounting plate is connected to the support rod, the insulating rod is connected to the mounting plate, the fixed base is connected to the insulating rod, and the bidirectional lead screw is rotatably connected to the fixed base. The induction coil is split into two and set in two coil clamps respectively. The induction coil is connected to the oscilloscope through wires. The insulating block is fixed to the bottom of the coil clamp, the insulating block is slidably set on the base and the insulating block is threaded to both sides of the bidirectional lead screw. The drive device is connected to the bidirectional lead screw and is used to drive the bidirectional lead screw to rotate.

2. The leakage current detection device according to claim 1, characterized in that: The support rod is a telescopic rod, which includes an inner rod and an outer rod. The inner rod is movably connected inside the outer rod, and the inner rod and the outer rod are fixed together by bolts.

3. The leakage current detection device according to claim 1, characterized in that: The mounting plate has four detection heads evenly spaced.

4. The leakage current detection device according to claim 1, characterized in that: The mounting plate is provided with an adjustment groove. The bottom of the insulating rod is fixedly connected to the mounting rod. The outer side of the mounting rod is provided with external threads and is threaded to an adjusting nut. The mounting rod is movably connected in the adjustment groove. The bottom of the mounting rod expands outward and abuts against the bottom of the mounting plate. The adjusting nut is used to lock the mounting rod on the mounting plate.

5. A leakage current detection device according to claim 1, characterized in that: The drive unit includes a control motor and a gear set. The control motor is fixedly connected to the fixed base. The drive gear is fixedly connected to the output shaft of the control motor. The driven gear is fixedly connected to one side of the double-acting lead screw. The drive gear and the driven gear mesh.

6. The leakage current detection device according to claim 1, characterized in that: A guide rod is fixed to the top of the coil clamp, and the guide rod is symmetrically and obliquely arranged on the two coil clamps.

7. The leakage current detection device according to claim 1, characterized in that: Limit plates are provided on both sides of the fixed base.

8. A leakage current detection device according to claim 1, characterized in that: A limiting beam is fixedly connected to the middle of the fixed base, and a groove is provided at the bottom of the insulating block, which cooperates with the limiting beam.

9. A leakage current detection device according to claim 1, characterized in that: The front and rear sides of the fixed base are provided with sliding grooves, and the bottom of the insulating block is slidably connected in the sliding grooves.

10. A leakage current detection device according to claim 1, characterized in that: Connectors are fixed to both sides of the induction coil, and wires are connected to the connectors.

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