High-voltage cable withstand voltage detection device

Abstract

The utility model discloses high -voltage cable pressure resistance detection device relates to cable detection technical field, including box, the inside of box is equipped with pressure resistance detection appearance, the upper end of pressure resistance detection appearance is equipped with display screen, the lateral wall of pressure resistance detection appearance is equipped with mutual inductor, the lateral wall of mutual inductor is equipped with and places the groove, the inboard of placing groove is equipped with pressing mechanism, the pressing mechanism includes the mount that fixed in the top of mutual inductor, the upper end of mount is equipped with with the threaded rod of mount screw joint and runs through, the lower extreme rotating joint of threaded rod has the pressure plate, the lower fixed connection of pressure plate has insulating pad. The utility model can simulate the extrusion working condition that cable possibly suffers in actual laying or operation, overcomes the major limitation that traditional pressure resistance detection can only carry out in the unstressed state, and the overall nature, authenticity and the foreseeing ability of potential operation risk of detection have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of cable testing technology, and in particular to a high-voltage cable withstand voltage testing device. Background Technology

[0002] In modern power systems, high-voltage cables serve as a crucial carrier for electrical energy transmission, and their safe and stable operation directly impacts the reliability and stability of the entire power network. With the continuous growth of electricity demand and the ongoing expansion of power grid construction, the application of high-voltage cables is becoming increasingly widespread, and the requirements for cable quality and performance are becoming increasingly stringent. Withstand voltage testing, as a vital step in ensuring the quality of high-voltage cables, plays a crucial role in preventing cable faults and ensuring the safe operation of the power system.

[0003] Traditional high-voltage cable withstand voltage testing typically involves testing the cable under stress-free conditions. However, during actual cable laying and operation, high-voltage cables are often subjected to various complex external forces, with compression being a common one. These compression effects can deform or damage the cable's insulation and sheath, affecting its electrical performance and increasing the risk of insulation breakdown and short circuits during operation. However, traditional high-voltage cable withstand voltage testing methods cannot simulate the compression conditions experienced by cables during actual laying or operation. This makes it difficult for traditional testing methods to comprehensively and accurately reflect the cable's performance under actual operating conditions and to effectively predict potential operational risks under complex conditions. For example, the patent with publication number CN221883809U, entitled "High-Voltage Cable Withstand Voltage Testing Device," suffers from the aforementioned problems. Therefore, there is a need to design a high-voltage cable withstand voltage testing device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-voltage cable withstand voltage testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-voltage cable withstand voltage testing device includes a housing. A withstand voltage tester is installed inside the housing. A display screen is located on the upper end of the withstand voltage tester. A current transformer is installed on the side wall of the withstand voltage tester. A placement slot is located on the side wall of the current transformer. A pressing mechanism is located inside the placement slot. The pressing mechanism includes a mounting bracket fixed to the top of the current transformer. A threaded rod threaded through the upper end of the mounting bracket and screwed to the mounting bracket is threaded through it. A pressure plate is rotatably connected to the lower end of the threaded rod. An insulating pad is fixedly connected to the lower end of the pressure plate.

[0007] As a further improvement of this utility model, two guide rods are fixedly connected to the upper end of the pressure plate. The two guide rods are symmetrically arranged on both sides of the threaded rod. The guide rods pass through the mounting frame and are slidably connected to the mounting frame.

[0008] As a further improvement of this utility model, a throttle handle is fixedly connected to the upper end of the threaded rod.

[0009] As a further improvement of this utility model, a box cover is hinged to the side wall of the box body, and a connecting bolt for screwing the box cover is provided through the side wall of the box cover. A connecting plate is fixedly connected to the upper end of the box body, and a connecting screw hole for cooperating with the connecting bolt is provided on the side wall of the connecting plate.

[0010] As a further improvement of this utility model, casters are provided at the four corners of the bottom of the box.

[0011] As a further improvement of this utility model, a battery is provided on the inner bottom wall of the box.

[0012] The beneficial effects of this utility model are:

[0013] By using pressure plates to compress cables, the compression conditions that cables may experience during actual laying or operation can be simulated. Under this pressure, current transformers can be used to test high voltage withstand voltage and insulation performance in real time. This overcomes the major limitation of traditional withstand voltage testing, which can only be performed under stress-free conditions, and significantly improves the comprehensiveness, authenticity, and predictability of potential operational risks. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the high-voltage cable withstand voltage testing device proposed in this utility model from one perspective.

[0015] Figure 2 This is a structural schematic diagram of the high-voltage cable withstand voltage testing device proposed in this utility model from another perspective.

[0016] Figure 3 This is a schematic diagram of the pressure plate, threaded rod, throttle, guide rod, and insulating pad of the high-voltage cable withstand voltage testing device proposed in this utility model.

[0017] In the diagram: 1. Box body, 2. Hinge, 3. Box cover, 4. Connecting bolt, 5. Connecting plate, 6. Connecting screw hole, 7. Moving wheel, 8. Withstand pressure tester, 9. Display screen, 10. Current transformer, 11. Placement slot, 12. Battery, 13. Mounting bracket, 14. Pressure plate, 15. Guide rod, 16. Threaded rod, 17. Throttle, 18. Insulating pad. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-3 The high-voltage cable withstand voltage testing device includes a housing 1. Four casters 7 are provided at the bottom corners of the housing 1. The casters 7 are universal casters with brakes. A withstand voltage tester 8 is installed inside the housing 1. A display screen 9 is located on the upper part of the withstand voltage tester 8. The withstand voltage tester 8, display screen 9, and current transformer 10 are configured as described in the patent publication CN221883809U entitled "High-Voltage Cable Withstand Voltage Testing Device." A battery 12 is installed on the inner bottom wall of the housing 1, providing power to the various electrical components of the device. A current transformer 10 is installed on the side wall of the withstand voltage tester 8. A placement groove 11 is provided on the side wall of the current transformer 10. A pressing mechanism is provided inside the placement groove 11. The pressing mechanism includes a mounting bracket 13 fixed to the top of the current transformer 10. A threaded rod 16, screwed to the upper end of the mounting bracket 13, is threaded through the upper end of the mounting bracket 13. The lower end of the threaded rod 16... A pressure plate 14 is rotatably connected to the end of the cable. An insulating pad 18 is fixedly connected to the lower end of the pressure plate 14. A handle 17 is fixedly connected to the upper end of the threaded rod 16. The handle 17 allows the threaded rod 16 to be rotated easily. When a cable withstand voltage test is required, the energized cable is placed inside the placement slot 11. The current transformer 10 detects the withstand voltage and insulation performance of the cable when it flows through high voltage in real time. The test data is displayed on the display screen 9 in real time. Then, the handle 17 drives the threaded rod 16 to rotate. Since the threaded rod 16 is screwed to the mounting bracket 13, the threaded rod 16 can move, causing the pressure plate 14 to move down. The pressure plate 14 then presses down on the cable. Under the condition of compressing the cable, the withstand voltage and insulation performance of the cable when it flows through high voltage are tested, completing the cable testing process under the condition of compression, making the cable testing more comprehensive.

[0020] In this utility model, two guide rods 15 are fixedly connected to the upper end of the pressure plate 14. The two guide rods 15 are symmetrically arranged on both sides of the threaded rod 16. The guide rods 15 pass through the mounting frame 13 and are slidably connected to the mounting frame 13. The movement of the pressure plate 14 can be guided by the guide rods 15 to ensure the stability of the movement of the pressure plate 14.

[0021] A lid 3 is hinged to the side wall of the box 1 via a hinge 2. A connecting bolt 4 is threaded through the side wall of the lid 3 and screwed into it. A connecting plate 5 is fixedly connected to the upper end of the box 1. A connecting screw hole 6 is provided on the side wall of the connecting plate 5 to cooperate with the connecting bolt 4. By covering the box with the lid 3 and screwing the connecting bolt 4 into the connecting screw hole 6, the lid 3 can be closed and fixed, thereby protecting the inside of the box 1 and reducing the impact of the external environment on the interior.

[0022] In use, the operator first pushes the housing 1 to the detection position using the bottom casters 7 and locks the casters 7 brakes. Then, the cover 3 hinged to the side wall of the housing 1 is opened. At this time, the withstand voltage tester 8 and battery 12 inside the housing 1 are in an operable state. The battery 12 is activated to power the withstand voltage tester 8. Then, the power cable to be tested is placed in the placement slot 11 on the side wall of the transformer 10. The transformer 10 detects the high voltage signal flowing through the cable in real time and displays the withstand voltage and insulation performance data of the cable in real time through the display screen 9 of the withstand voltage tester 8. Next, the operator rotates the handle 17 in the pressing mechanism. Since the handle 17 is fixedly connected to the threaded rod 16 and the threaded rod 16 is screwed to the mounting bracket 13 installed on the top of the transformer 10, rotating the handle 17 drives the threaded rod 16 vertically. Moving downwards, the threaded rod 16 presses down on the pressure plate 14 rotatably connected to it. The pressure plate 14 maintains vertical downward stability under the sliding fit constraint of its symmetrically arranged guide rod 15 and mounting bracket 13. Finally, the insulating pad 18 at the lower end of the pressure plate 14 contacts and stably presses the cable. Under the continuous application of downward pressure, the current transformer 10 continues to perform dynamic testing on the high voltage withstand voltage and insulation performance of the compressed cable. The test data is continuously fed back in real time through the display screen 9. After the test is completed, the reverse rotation handle 17 drives the threaded rod 16 to rotate upwards, driving the pressure plate 14 and insulating pad 18 to lift away from the cable and remove the pressure. The tested cable is taken out from the placement slot 11. Finally, the box cover 3 is closed and the connecting bolt 4 is screwed through the box cover 3 and into the connecting screw hole 6 fixed to the upper end connecting plate 5 of the box body 1 to securely lock the box cover 3, completing the protection.

[0023] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A high-voltage cable withstand voltage testing device, comprising a housing (1), wherein a withstand voltage tester (8) is provided inside the housing (1), a display screen (9) is provided at the upper end of the withstand voltage tester (8), and a current transformer (10) is provided on the side wall of the withstand voltage tester (8), characterized in that, The current transformer (10) has a placement groove (11) on its side wall. The inner side of the placement groove (11) is provided with a pressing mechanism. The pressing mechanism includes a mounting bracket (13) fixed to the top of the current transformer (10). The upper end of the mounting bracket (13) is provided with a threaded rod (16) screwed to the mounting bracket (13). The lower end of the threaded rod (16) is rotatably connected to a pressure plate (14). The lower end of the pressure plate (14) is fixedly connected to an insulating pad (18).

2. The high-voltage cable withstand voltage testing device according to claim 1, characterized in that, The upper end of the pressure plate (14) is fixedly connected to two guide rods (15). The two guide rods (15) are symmetrically arranged on both sides of the threaded rod (16). The guide rods (15) pass through the mounting frame (13) and are slidably connected to the mounting frame (13).

3. The high-voltage cable withstand voltage testing device according to claim 1, characterized in that, A throttle (17) is fixedly connected to the upper end of the threaded rod (16).

4. The high-voltage cable withstand voltage testing device according to claim 1, characterized in that, A box cover (3) is hinged to the side wall of the box body (1) by a hinge (2). A connecting bolt (4) for screwing into the box cover (3) is provided through the side wall of the box cover (3). A connecting plate (5) is fixedly connected to the upper end of the box body (1). A connecting screw hole (6) for cooperating with the connecting bolt (4) is provided on the side wall of the connecting plate (5).

5. The high-voltage cable withstand voltage testing device according to claim 1, characterized in that, The box (1) is equipped with casters (7) at the four corners of its bottom.

6. The high-voltage cable withstand voltage testing device according to claim 1, characterized in that, A battery (12) is provided on the inner bottom wall of the box (1).

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