Caliper type cable partial discharge detection device

Abstract

The utility model provides a caliper type cable partial discharge detection device which comprises two caliper shells, one end of each caliper shell is provided with a crank rod, a torsion connection structure is arranged between the two caliper shells, one caliper shell is provided with a data processing transmission module, and the other caliper shell is provided with a data transmission module. A two-core shielding wire is arranged between the caliper shell and the data processing transmission module, a high-frequency electrode and a power-frequency electrode are arranged in the caliper shell, the high-frequency electrode and the power-frequency electrode correspond to the two-core shielding wire and the data processing transmission module, and a fixing assembly is arranged at the other end of the caliper shell. According to the utility model, the device can be clamped and fixed on a cable, the same group of three-phase cables have the same fixed torque and wrapping distance, and the consistency of partial discharge detection of the three-phase cables is improved; the movement is convenient, and the mounting efficiency is improved; high-frequency partial discharge signals and power frequency synchronous signals can be collected, so that the application range of the device is expanded, and the anti-interference performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, in particular to a caliper type cable partial discharge detection device. Background Art

[0002] There are many technical routes and product forms for detecting partial discharge of cables, including online monitoring devices for partial discharge of power cables, portable detection equipment, on-site handheld detection equipment, etc. Real-time monitoring is used together with the placement of the equipment to be inspected. After detecting a partial discharge signal, an alarm is sent to the background to achieve the purpose of preventive warning; while handheld devices are generally used as tools for on-site diagnosis. The handheld cable partial discharge monitoring and rapid status assessment device can realize the live rapid measurement, analysis and diagnosis of partial discharge of transmission and distribution line cables. For example, the patent with publication number CN211741464U discloses a wireless cable partial discharge detection device and system based on a high-frequency current sensor. The wireless detection device is mounted on the cable intermediate joint of the power cable, and the measuring wire is connected to the copper shielded ground wire in the cable intermediate joint. When installing the device, the measuring wire needs to be connected to the cable, and it is not convenient to disassemble it after the installation is completed, resulting in low installation efficiency. At the same time, it is not convenient to change the installation position after the installation is completed.

[0003] To this end, the utility model provides a caliper type cable partial discharge detection device. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a clamp-type cable partial discharge detection device to solve the problems raised in the above-mentioned background technology. The utility model can clamp and fix the device on the cable, and has the same fixing torque and winding distance for the same group of three-phase cables, thereby improving the consistency of the three-phase cable partial discharge detection; it is also convenient to move and improve the installation efficiency; it can collect high-frequency partial discharge signals and industrial frequency synchronization signals, thereby expanding the application scope of the device and improving the anti-interference ability; it can also directly transmit the results to the terminal through the data processing and transmission module, thereby facilitating the display, analysis and storage of the measurement data, thereby performing rapid diagnosis, and can break away from the limitation of data line length, is suitable for outdoor work, and has high safety.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a caliper-type cable partial discharge detection device, comprising two caliper shells, one end of each of the caliper shells is equipped with a crank rod, a torsion connection structure is installed between the two caliper shells, a data processing and transmission module is installed on one of the caliper shells, a two-core shielded wire is installed between the caliper shell and the data processing and transmission module, a high-frequency electrode and an industrial frequency electrode are installed in the caliper shell, the high-frequency electrode and the industrial frequency electrode correspond to the two-core shielded wire and the data processing and transmission module, a fixing component is installed at the other end of the caliper shell, and a plurality of insulating protrusions are fixed on the relative inner side of the caliper shell.

[0006] Furthermore, the crank rod is fixedly connected to the caliper housing, the caliper housing is a semi-annular structure, and the two caliper housings are rotatably connected.

[0007] Furthermore, the torsion connection structure includes a torsion spring, and two ends of the torsion spring are respectively fixedly connected to the two caliper housings.

[0008] Furthermore, the two-core shielded wires are connected to the data processing and transmission module through a torsion spring.

[0009] Furthermore, insulating silica gel is installed between the high-frequency electrode and the industrial frequency electrode, and an insulating foam pad is installed on the opposite inner side of the caliper housing.

[0010] Furthermore, the high-frequency electrode is a copper alloy film, the industrial frequency electrode is an alloy wire antenna, and the two-core shielded wire is a silver-plated coaxial cable.

[0011] Furthermore, the caliper housing is made of hard aluminum alloy material, the inner side of the caliper housing is a hollow structure, the hollow structure corresponds to the high-frequency electrode and the industrial frequency electrode, and the data processing and transmission module includes a battery, a communication module and a data acquisition module.

[0012] Furthermore, the fixing assembly includes a fixing block, wherein one fixing block is provided with a plurality of slots, and another fixing block is fixed with a plurality of elastic blocks, wherein the elastic blocks correspond to the slots.

[0013] Beneficial effects of the utility model: The utility model provides a caliper-type cable partial discharge detection device, comprising a caliper shell; a fixing component; an insulating protrusion; a high-frequency electrode; an industrial frequency electrode; and a data processing and transmission module.

[0014] A fixing component is installed on the caliper housing, and an insulating protrusion is installed in the caliper housing. The device can be clamped and fixed on the cable. It has the same fixing torque and winding distance for the same group of three-phase cables, thereby improving the consistency of partial discharge detection of the three-phase cables. When it needs to be moved, it only needs to separate the two caliper housings for disassembly, which facilitates movement and improves installation efficiency. High-frequency electrodes and industrial frequency electrodes are installed in the caliper housing to collect high-frequency partial discharge signals and industrial frequency synchronization signals, thereby expanding the application scope of the device and improving anti-interference performance. The results can also be directly transmitted to the terminal through the data processing and transmission module, which facilitates the display, analysis and storage of the measurement data, thereby performing rapid diagnosis. It can break away from the limitation of data line length, is suitable for outdoor work, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall assembly three-dimensional structure of a caliper-type cable partial discharge detection device of the utility model;

[0016] Figure 2 It is a schematic diagram of the assembled three-dimensional structure of a torsion connection structure, a two-core shielded wire, a high-frequency electrode, and an industrial frequency electrode in a caliper-type cable partial discharge detection device of the utility model;

[0017] Figure 3 This is a structural schematic diagram of a data acquisition module in a caliper-type cable partial discharge detection device of the utility model;

[0018] Figure 4 It is a schematic diagram of the assembly structure of a fixed block, an elastic clamp block and a clamp slot in a clamp-type cable partial discharge detection device of the utility model;

[0019] In the figure: 1. crank rod; 2. two-core shielded wire; 3. torsion connection structure; 301. torsion spring; 4. communication module housing; 5. caliper housing; 6. insulating foam pad; 7. battery; 8. communication module; 9. high-frequency electrode; 10. power frequency electrode; 11. insulating silicone; 12. data acquisition module; 13. fixing block; 14. elastic card block; 15. card slot; 16. insulating protrusion. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] See also Figures 1 to 4The utility model provides a technical solution: a caliper type cable partial discharge detection device, comprising two caliper shells 5, one end of each of the caliper shells 5 is equipped with a crank rod 1, a torsion connection structure 3 is installed between the two caliper shells 5, a data processing and transmission module is installed on one of the caliper shells 5, a two-core shielded wire 2 is installed between the caliper shell 5 and the data processing and transmission module, a high-frequency electrode 9 and an industrial frequency electrode 10 are installed in the caliper shell 5, the high-frequency electrode 9 and the industrial frequency electrode 10 correspond to the two-core shielded wire 2 and the data processing and transmission module, a fixing component is installed at the other end of the caliper shell 5, and a plurality of insulating protrusions 16 are fixed to the relative inner side of the caliper shell 5.

[0022] In this embodiment, the crank rod 1 is fixedly connected to the caliper housing 5, the caliper housing 5 is a semi-annular structure, the two caliper housings 5 ​​are rotatably connected, the torsion connection structure 3 includes a torsion spring 301, and the two ends of the torsion spring 301 are respectively fixedly connected to the two caliper housings 5. The fixing assembly includes a fixing block 13, one of the fixing blocks 13 is provided with a plurality of slots 15, and the other fixing block 13 is fixed with a plurality of elastic blocks 14, and the elastic blocks 14 correspond to the slots 15.

[0023] Specifically, when the device needs to be fixed, the device is placed on the cable, and the caliper housing 5 is clamped on the side of the cable, so that the elasticity of the torsion spring 301 itself drives the two caliper housings 5 ​​to clamp and fix the cables. At this time, the crank rod 1 is pulled to make the caliper housings 5 ​​continue to move closer, and the elastic clamping block 14 can enter the clamping groove 15, so that the elastic clamping block 14 and the clamping groove 15 are in a clamping relationship, thereby improving stability, and the insulating protrusion 16 will squeeze the cable, thereby further fixing the device.

[0024] The two-core shielded wire 2 passes through the torsion spring 301 and is connected to the data processing and transmission module. An insulating silicone 11 is installed between the high-frequency electrode 9 and the power frequency electrode 10. An insulating foam pad 6 is installed on the relatively inner side of the caliper housing 5. The high-frequency electrode 9 is a copper alloy film, the power frequency electrode 10 is an alloy wire antenna, the two-core shielded wire 2 is a silver-plated coaxial cable, the caliper housing 5 is made of hard aluminum alloy material, and the relatively inner side of the caliper housing 5 is a hollow structure, which corresponds to the high-frequency electrode 9 and the power frequency electrode 10. The data processing and transmission module includes a battery 7, a communication module 8 and a data acquisition module 12. The data acquisition module 12 includes a high-speed channel and a low-speed channel. The high-frequency electrode 9 is connected to the high-speed channel, and the low-speed channel is connected to the power frequency electrode 10.

[0025] Specifically, when the cable has partial discharge, the high-frequency electrode 9 can be used to collect high-frequency partial discharge signals, and the industrial frequency electrode 10 can collect industrial frequency synchronization signals. The sampling rate of the high-speed channel is not less than 200MS / s, and the sampling rate of the low-speed channel is not less than 10KS / s. After the collection is completed, the communication module 8 transmits it to the terminal, and the real-time collection of waveform signals can be completed, with strong anti-interference ability.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A caliper type cable partial discharge detection device, comprising two caliper housings (5), characterized in that: A crank rod (1) is installed at one end of the caliper housing (5), a torsion connection structure (3) is installed between the two caliper housings (5), a data processing and transmission module is installed on one of the caliper housings (5), a two-core shielded wire (2) is installed between the caliper housing (5) and the data processing and transmission module, a high-frequency electrode (9) and an industrial frequency electrode (10) are installed in the caliper housing (5), and the high-frequency electrode (9) and the industrial frequency electrode (10) correspond to the two-core shielded wire (2) and the data processing and transmission module, a fixing component is installed at the other end of the caliper housing (5), and a plurality of insulating protrusions (16) are fixed on the relative inner side of the caliper housing (5).

2. A caliper-type cable partial discharge detection device according to claim 1, characterized in that: The crank rod (1) is fixedly connected to the caliper housing (5); the caliper housing (5) is a semi-annular structure; and the two caliper housings (5) are rotatably connected.

3. A caliper type cable partial discharge detection device according to claim 1, characterized in that: The torsion connection structure (3) comprises a torsion spring (301), and two ends of the torsion spring (301) are respectively fixedly connected to two caliper housings (5).

4. A caliper type cable partial discharge detection device according to claim 3, characterized in that: The two-core shielded wire (2) passes through a torsion spring (301) and is connected to a data processing and transmission module.

5. The caliper type cable partial discharge detection device according to claim 1, characterized in that: An insulating silica gel (11) is installed between the high-frequency electrode (9) and the industrial frequency electrode (10), and an insulating foam pad (6) is installed on the opposite inner side of the caliper housing (5).

6. A caliper type cable partial discharge detection device according to claim 1, characterized in that: The high-frequency electrode (9) is a copper alloy film, the industrial frequency electrode (10) is an alloy wire antenna, and the two-core shielded wire (2) is a silver-plated coaxial cable.

7. The caliper-type cable partial discharge detection device according to claim 1, characterized in that: The caliper housing (5) is made of a hard aluminum alloy material. The inner side of the caliper housing (5) is a hollow structure, and the hollow structure corresponds to the high-frequency electrode (9) and the industrial frequency electrode (10). The data processing and transmission module comprises a battery (7), a communication module (8) and a data acquisition module (12).

8. The caliper type cable partial discharge detection device according to claim 1, characterized in that: The fixing assembly comprises a fixing block (13), wherein one fixing block (13) is provided with a plurality of slots (15), and another fixing block (13) is fixed with a plurality of elastic blocks (14), wherein the elastic blocks (14) correspond to the slots (15).

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