GIS ultrahigh frequency sensor fixing device

Abstract

The utility model relates to the technical field of electric power detection, and particularly discloses a GIS ultrahigh frequency sensor fixing device which comprises an ultrahigh frequency sensor, a cable, a cable fixing structure and a clamping jaw structure used for clamping the ultrahigh frequency sensor. Matching holes are formed in the circumferential surfaces of a semi-ring cylinder A and a semi-ring cylinder B of the cable fixing structure. The clamping jaw structure comprises a clamping jaw A and a clamping jaw B which are arranged in a bilateral symmetry mode, matching columns are integrally formed on the sides, facing the cable fixing structure, of the clamping jaw A and the clamping jaw B, and the matching columns are connected with the matching holes in an embedded and matched mode. According to the device, the cable fixing structure and the to-be-detected cable are installed in a lossless clamping mode, the clamping jaw structure is stably clamped in a detection hole in the middle of the ultrahigh frequency sensor, and the effect that the ultrahigh frequency sensor is fixed to the exterior of the cable is achieved through clamping fit of the clamping jaw structure and the cable fixing structure; the fixing device is suitable for the scene that the ultrahigh frequency sensor temporarily detects the cable, and is easy to mount and dismount.

Description

Technical Field

[0001] This utility model relates to the field of power detection technology, specifically to a GIS ultra-high frequency sensor fixing device. Background Technology

[0002] Partial discharge monitoring is now an internationally recognized and widely adopted technique for diagnosing the insulation condition of equipment. It is primarily used for routine inspections or on-site testing of high-voltage equipment in substations. It is used to monitor and analyze partial discharge signals inside gas-insulated switchgear (GIS) equipment. The data is centrally analyzed by a data analysis system, displayed, and alarms are output, thereby monitoring and evaluating the operating status of the GIS equipment and effectively preventing sudden accidents in GIS high-voltage equipment. The large amount of partial discharge data and the complex on-site conditions make real-time monitoring a challenging task. When partial discharge occurs inside a cable, high-frequency current propagates to the ground along the grounding wire. Partial discharge detection is achieved by installing a high-frequency partial discharge sensor on the grounding wire to detect the high-frequency current signal. The high-frequency partial discharge sensor uses the Rogowski coil method, with multiple turns of conductive coil wound around a toroidal magnetic core. The high-frequency alternating electromagnetic field caused by the high-frequency current passing through the center of the magnetic core induces a voltage on the coil. There is no electrical connection between the sensor's measurement circuit and the measured current, making it a non-invasive detection method that does not require the equipment under test to be shut down. By using an online partial discharge monitoring system to monitor and track partial discharge trends, its development over time can be continuously observed, allowing for timely replacement of high-voltage cables or cable accessories before a failure occurs.

[0003] Among the equipment for partial discharge monitoring, there is an HF series high-frequency partial discharge monitoring sensor. This device can be unfolded and combined for easy installation on the outside of the cable. Currently, the HF series high-frequency partial discharge monitoring sensor lacks effective structural support when installed on the outside of the cable. The fixing methods of manual clamping or tool lifting are not ideal, and not only pose safety hazards, but are also quite tiring. Therefore, we propose a GIS ultra-high frequency sensor fixing device. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model provides a GIS UHF sensor fixing device, which can solve the above problems.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0006] A GIS UHF sensor fixing device includes an UHF sensor and a cable. The cable is fitted with a cable fixing structure, and the two ends of the cable fixing structure are connected to gripper structures for holding the UHF sensor.

[0007] The cable fixing structure includes two spliced ​​and fixed semi-ring cylinders A and B, and mating holes are opened on the circumferential surfaces of both semi-ring cylinders A and B.

[0008] The gripper structure includes grippers A and B arranged symmetrically on the left and right sides. Both grippers A and B have an integrally formed mating post on the side facing the cable fixing structure. The mating post is embedded and connected with the mating hole.

[0009] Furthermore, the inner circumferential surfaces of both semi-annular cylinders A and B are integrally formed with soft rubber pillars A, and the inner upper and lower surfaces of the gripper A and the inner upper and lower surfaces of the gripper B are integrally formed with soft rubber pillars B.

[0010] Furthermore, the diameter of the mating post is consistent with the inner diameter of the mating hole, and the end of the mating post is integrally formed with a soft head, the diameter of which is 1mm larger than the diameter of the mating post.

[0011] Furthermore, connecting strips are fixedly installed at both ends of the semi-ring cylinder A and the semi-ring cylinder B. The connecting strip of the semi-ring cylinder A is fastened to the connecting strip on the same side of the semi-ring cylinder B by screws made of nylon.

[0012] Furthermore, both the cable fixing structure and the clamping structure are made of plastic.

[0013] The beneficial effects of this utility model are as follows: The cable fixing structure of this application device can be non-destructively clamped and installed with the cable to be tested. The clamping structure is firmly clamped in the detection hole in the middle of the UHF sensor. Through the snap-fit ​​cooperation between the clamping structure and the cable fixing structure, the UHF sensor can be fixed to the outside of the cable. This fixing device is suitable for the scenario of temporary detection of cables by UHF sensor. It is easy to install and disassemble. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the GIS UHF sensor mounting device and cable assembly.

[0017] Figure 2 This is an exploded view of a fixed GIS UHF sensor device.

[0018] In the picture:

[0019] 1. UHF sensor; 2. Cable; 3. Cable fixing structure; 301. Semi-ring A; 302. Semi-ring B; 4. Clamping structure; 401. Clamp A; 402. Clamp B; 5. Mating post; 501. Soft head; 6. Soft rubber post A; 7. Connecting strip; 8. Screw; 9. Mating hole; 10. Soft rubber post B. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 skilled in the art are within the protection scope of the present utility model.

[0021] like Figure 1-2 As shown, this utility model discloses a GIS UHF sensor fixing device, including a UHF sensor 1 and a cable 2. The cable 2 is covered with a cable fixing structure 3, and the two ends of the cable fixing structure 3 are connected to a clamping claw structure 4 for clamping the UHF sensor 1.

[0022] The cable fixing structure 3 includes two spliced ​​and fixed semi-ring cylinders A301 and B302. Both semi-ring cylinders A301 and B302 have mating holes 9 on their circumferential surfaces.

[0023] The gripper structure 4 includes grippers A401 and B402 arranged symmetrically on the left and right. Both grippers A401 and B402 have an integrally formed mating post 5 on the side facing the cable fixing structure 3. The mating post 5 is embedded and connected with the mating hole 9.

[0024] Example 1: The gripper 401, gripper B402, mating post 5, semi-ring cylinder A301, semi-ring cylinder B302, and connecting strip 7 are all made of polyamide (which has good mechanical properties, wear resistance, and electrical properties). To avoid affecting the detection operation of the UHF sensor 1, the clamping distance between grippers 401 and B402 is 2cm greater than the thickness of the UHF sensor 1. The length of the soft rubber post B10 is 1.2cm. When grippers 401 and B402 are clamped on the UHF sensor 1, the soft rubber post B10 makes frictional contact with the surface of the UHF sensor 1. The UHF sensor 1 is an HF series high-frequency partial discharge monitoring sensor, installed on the grounding wire of the cable input bushing / surge capacitor, the cable body, or the shielding layer. On grounding wires, on the secondary windings of current transformers in switchgear, and on the neutral lines of generators and transformers, reliable real-time online monitoring and diagnosis of discharge conditions occurring on high-voltage equipment can be performed. Semi-ring cylinders A301 and B302, together with soft rubber posts A6, rub against and adhere to the cable 2 and are fastened with screws 8. The mating posts 5 on the outside of the clamps 401 and B402 are interference-fitted with the mating holes 9 of the semi-ring cylinders A301 and B302 through soft heads 501, thereby achieving a stable connection between the cable fixing structure 3 and the clamping structure 4. The UHF sensor 1 is clamped on the clamping structure 4, and the cable fixing structure 3 is fixed on the cable, thereby achieving the effect of fixing the UHF sensor 1 to the outside of the cable 2.

[0025] In the preferred technical solution, soft rubber pillars A6 are integrally formed on the inner circumferential surfaces of both semi-annular cylinders A301 and B302. The soft rubber pillars A6 facilitate the tight fit between the cable fixing structure 3 and the cable 2, improving the fastening performance. Soft rubber pillars B10 are integrally formed on the upper and lower inner surfaces of the gripper A401 and the gripper B402. The soft rubber pillars B10 are used for the gripper structure 4 to fit tightly against the UHF sensor 1 without damaging the surface of the UHF sensor 1.

[0026] In the preferred technical solution, the diameter of the mating post 5 is consistent with the inner diameter of the mating hole 9. The end of the mating post 5 is integrally formed with a soft head 501. The diameter of the soft head 501 is 1mm larger than the diameter of the mating post 5. The mating post 5 combined with the soft head 501 can be interference-fitted with the mating hole 9, so that the cable fixing structure 3 and the clamping structure 4 are firmly connected.

[0027] In the preferred technical solution, connecting strips 7 are fixedly installed at both ends of the semi-ring cylinder A301 and the semi-ring cylinder B302. The connecting strip 7 of the semi-ring cylinder A301 and the connecting strip on the same side of the semi-ring cylinder B302 are fastened together by screws 8. The screws 8 are nylon screws, which realize the assembly of the semi-ring cylinder A301 and the semi-ring cylinder B302 and facilitate the fitting with the cable 2.

[0028] In practical use, the monitoring point of cable 2 is determined, the cable fixing structure 3 is bound to the monitoring point, and the screws 8 on the connecting strip 7 are tightened so that the cable fixing structure 3 and cable 2 are firmly attached. The UHF sensor 1 is first clamped to the outside of cable 2, and then the clamps A401 and B402 are clamped to the inner hole of the UHF sensor 1. Finally, the mating posts 5 of clamps A401 and B402 are press-fitted with the mating holes 9 of semi-ring cylinder A301 and semi-ring cylinder B302 through the soft head 501. At this time, the UHF sensor 1 is firmly installed outside the monitoring point of cable 2. The UHF sensor 1 is connected to the detection host through the wire harness to perform data detection.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A GIS UHF sensor fixing device, comprising an UHF sensor (1) and a cable (2), characterized in that, The cable (2) is fitted with a cable fixing structure (3), and the two ends of the cable fixing structure (3) are connected to a clamping claw structure (4) for clamping the ultra-high frequency sensor (1). The cable fixing structure (3) includes two spliced ​​and fixed semi-ring cylinders A (301) and B (302), and the circumferential surfaces of the semi-ring cylinders A (301) and B (302) are provided with mating holes (9). The gripper structure (4) includes grippers A (401) and B (402) arranged symmetrically on the left and right. Both grippers A (401) and B (402) have an integrally formed mating post (5) on the side facing the cable fixing structure (3). The mating post (5) is embedded and connected with the mating hole (9).

2. The GIS UHF sensor fixing device according to claim 1, characterized in that, The inner circumferential surfaces of the semi-annular cylinder A (301) and the semi-annular cylinder B (302) are integrally formed with soft rubber columns A (6), and the upper and lower surfaces of the inner walls of the gripper A (401) and the gripper B (402) are integrally formed with soft rubber columns B (10).

3. The GIS UHF sensor fixing device according to claim 1, characterized in that, The diameter of the mating post (5) is consistent with the inner diameter of the mating hole (9). The end of the mating post (5) is integrally formed with a soft head (501), and the diameter of the soft head (501) is 1 mm larger than the diameter of the mating post (5).

4. The GIS UHF sensor fixing device according to claim 1, characterized in that, Both ends of the semi-ring cylinder A (301) and the semi-ring cylinder B (302) are fixedly provided with connecting strips (7). The connecting strip (7) of the semi-ring cylinder A (301) and the connecting strip on the same side of the semi-ring cylinder B (302) are fastened together by screws (8).

5. The GIS UHF sensor fixing device according to claim 4, characterized in that, The screw (8) is a nylon screw.

6. The GIS UHF sensor fixing device according to claim 1, characterized in that, Both the cable fixing structure (3) and the clamp structure (4) are made of plastic.

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