A high-voltage unconventional cross-section cable accessory and its testing device

Abstract

This invention relates to the field of non-standard cross-section cable accessory testing technology, and discloses a high-voltage non-standard cross-section cable accessory and its testing device, including a pressurizing mechanism, a control mechanism, connecting lines, and pre-connected cables for testing. Three testing device terminals within the connecting lines are equipped with connecting components, and an external limiting base plate is provided. The connecting components include a first conductor, an arc-shaped conductive sheet, and an annular tightening strip. The tightening strip allows the conductive sheet to tightly adhere to the second conductor of the cable core, and the end faces of the first and second conductors are in contact. The limiting base plate provides independent isolation space. The driving component enables synchronous driving of multiple connections. This invention aims to solve the problems of unstable grounding, short circuits due to contact, and high contact resistance affecting results when using connecting clips for multi-strand cable core testing. This device improves the connection contact area and uniformity, reduces contact resistance, avoids short circuits and missed connections, and ensures testing safety, reliability, and data accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection of cable accessories with irregular cross sections, and in particular to a high-voltage cable accessory with irregular cross sections and a detection device thereof. BACKGROUND

[0002] A cable intermediate joint is a key connection part of a cable line, and the cores and insulation layers of two cable sections need to be connected in this process. In this process, insulation defects, improper installation processes, such as loose insulation, bubbles or impurities, poor sealing, and the like, can form weak points in the insulation. During the operation of a power system, the intermediate joint needs to withstand the rated voltage for a long time. If the insulation performance is not up to standard, partial discharge, breakdown, and the like can occur under high voltage, causing power outages, equipment damage, and even fires and other safety accidents. Through voltage resistance detection, actual operating voltage or higher test voltage can be simulated to effectively detect these potential defects, eliminate risks in advance, ensure that the intermediate joint can withstand system voltage, overvoltage, and the like during long-term service, avoid power outages or safety accidents caused by joint failure, and ensure the reliable operation of the entire cable line.

[0003] For the existing related technology, the inventors believe that the following defects often exist: when detecting a high-voltage cable with an irregular cross section, a plurality of cable cores are arranged inside, and when one of the cable cores is detected, the other cable cores need to be stably grounded. The existing detection device usually uses alligator clips to connect the detection lead to the conductor of the cable accessory to be detected. If the grounding is unstable due to an operation error, or the connection clips are in contact with each other, it will cause great danger. Moreover, the connection clips are usually directly clamped on the outside of the conductor, and the gap between the end faces is large, which will increase the resistance and affect the detection result. SUMMARY

[0004] The technical problem to be solved by the present application is that in the prior art, a cable with an irregular cross section contains a plurality of cable cores, and when one of the cable cores is detected, the others need to be stably grounded. However, the existing device uses alligator clips to connect the detection lead, which can easily cause unstable grounding or dangerous contact of the connection clips due to an operation error. Moreover, the connection clips are directly clamped on the outside of the conductor, and the gap between the end faces is large, which will increase the resistance and affect the detection result. Therefore, the present application provides a high-voltage cable accessory with an irregular cross section and a detection device thereof.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is as follows: a high-voltage unconventional cross-section cable accessory and a detection device thereof, comprising: a control mechanism electrically connected to the side of the pressurizing mechanism, another side of the pressurizing mechanism electrically connected with a connecting line, the inside of the connecting line wrapped with three detection device wires, two of which are ground wires and one is a pressurized detection wire, the end of the detection device wire is provided with a connecting assembly, the outside of the connecting assembly is provided with a limiting bottom plate, the side of the limiting bottom plate is fixedly connected with a detection pre-connected cable, the inside of the detection pre-connected cable is wrapped with three cable cores, and the cable core is clamped and connected to the inside of the limiting bottom plate; the connecting assembly comprises a first conductor, the first conductor is a conductor inside the detection device wire, the end of the first conductor is integrally connected with a conductive sheet, the connecting assembly further comprises a second conductor, and the second conductor is a conductor inside the cable core, the part of the second conductor extending out of the cable core is wrapped in the inside of the conductive sheet, the outside of the conductive sheet is annularly arrayed with a tightening strip, one end of the tightening strip is fixedly connected with a rotating ring, and the other end of the tightening strip is fixedly connected with a fixed ring, when the rotating ring is rotated, the tightening strip is rotated and tightened, the conductive sheet is tightly attached to the outer wall of the second conductor, and in the process of rotating and tightening the tightening strip, the first conductor approaches the second conductor, and the end faces of the two are tightly attached.

[0006] Preferably, the shape of the conductive sheet is arc-shaped, and the conductive sheet is symmetrically provided with two groups about the horizontal central axis of the second conductor.

[0007] Preferably, the outside of the tightening strip is wrapped with a protective sleeve, one end of the protective sleeve is fixedly connected with the rotating ring, and the other end of the protective sleeve is fixedly connected with the fixed ring.

[0008] Preferably, the outside of the first conductor is fixedly connected with a rotating protrusion, and the rotating ring is rotatably connected to the outside of the rotating protrusion.

[0009] Preferably, the side of the fixed ring away from the tightening strip is fixedly connected with a limiting fixed plug, the limiting fixed plug is symmetrically provided with two about the vertical central axis of the fixed ring, and the limiting fixed plug is inserted into the inside of the limiting bottom plate for limiting and fixing the fixed ring.

[0010] Preferably, the bottom of the rotating ring is provided with a driving assembly, and the driving assembly is used to drive the rotating ring to rotate.

[0011] Preferably, the driving assembly comprises a gear ring, the gear ring is sleeved on the outer wall of the rotating ring, and the gear ring is fixedly connected with the rotating ring.

[0012] Preferably, the bottom of the gear ring is engaged with a rack, the bottom of the rack is fixedly connected with a sliding block, and the sliding block is slidingly connected to the inside of the limiting bottom plate.

[0013] Preferably, the end of the rack is fixedly connected with an anti-off block, the top of the anti-off block is clamped and connected with a limiting socket, the top of the limiting bottom plate is rotatably connected with a sealing cover, and the limiting socket is fixedly connected to the side of the sealing cover.

[0014] Preferably, the high-voltage unconventional cross-section cable accessory comprises a cable intermediate joint assembly, and the cable intermediate joint assembly comprises an accessory shell, three groups of insulating sleeves are arranged in the interior of the accessory shell, a connecting sleeve penetrates through the interior of the insulating sleeve, and a heat shrink sleeve is fixedly connected to the end of the accessory shell.

[0015] The technical effects and advantages of the present application are as follows: in the connection structure, the connection assembly of the arc-shaped conductive sheet and the annular array of tightening strips replaces the traditional connection clamp, the arc-shaped fitting of the conductive sheet and the second conductor of the cable core conductor and the uniform centripetal pressure applied by the tightening strips greatly improve the contact area and the uniformity of the pressure, significantly reduce the contact resistance, reduce the resistance loss and local heating, avoid arc discharge, and at the same time, guarantee the connection stability and avoid the risk of unstable grounding. In the driving and operation, through the unified driving mechanism of the driving assembly, the synchronous connection of multiple connection assemblies and cable cores is realized, which avoids the uneven problem of manual operation, guarantees the consistency of all connection points, eliminates the missed connection, ensures that the to-be-tested cable core and the grounding cable core can be reliably connected during testing, and comprehensively improves the safety, reliability and detection data accuracy of the high-voltage unconventional cross-section cable accessory detection. BRIEF DESCRIPTION OF DRAWINGS

[0016] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the three-dimensional structure of the limiting bottom plate and the connection assembly part of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the connection assembly part in the straightened state of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of the connection assembly part in the tightened state of the present application; Figure 5 It is a schematic diagram of the cross-sectional structure of the connection assembly part of the present application; Figure 6 It is a schematic diagram of the exploded structure of the connection assembly part of the present application; Figure 7 It is a schematic diagram of the three-dimensional structure of the driving assembly part of the present application; Figure 8 It is a schematic diagram of the cross-sectional structure of the cable intermediate joint assembly part of the present application;Figure 9 This is a schematic diagram of the internal structure of the limiting base plate of the present invention.

[0018] Legend: 1. Pressurizing mechanism; 2. Connecting wire; 3. Wiring of detection device; 4. Limiting base plate; 5. Connecting assembly; 6. Cable core; 7. Drive assembly; 8. Pre-connected cable for detection; 9. Cable intermediate joint assembly; 10. Sealing cover; 11. Control mechanism; 501. First conductor; 502. Rotating protrusion; 503. Rotating ring; 504. Conductive sheet; 505. Tightening strip; 506. Protective sleeve; 507. Second conductor; 508. Limiting fixing block; 509. Fixing ring; 701. Toothed ring; 702. Toothed rack; 703. Limiting bayonet; 704. Slider; 705. Anti-detachment block; 901. Accessory shell; 902. Connecting sleeve; 903. Insulating sleeve; 904. Heat shrink sleeve. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0020] Reference Figure 8 As shown, the present invention provides a technical solution: a high-voltage unconventional cross-section cable accessory includes a cable intermediate joint assembly 9, which includes an accessory housing 901. The accessory housing 901 has three sets of insulating sleeves 903 inside, and a connecting sleeve 902 passes through the interior of each insulating sleeve 903. A heat-shrink sleeve 904 is fixedly connected to the end of the accessory housing 901. When using the cable intermediate joint assembly 9 to connect two unconventional cross-section cables, the insulation layer at the cable end is peeled off to expose the second conductor 507. The second conductors 507 from both sides of the cable are inserted into the interior of the connecting sleeve 902 from both sides of the accessory housing 901, and the connecting sleeve 902 is squeezed to fix the second conductors 507 on both sides, thereby achieving the cable connection.

[0021] The core function of the cable intermediate joint assembly 9 is to connect two sections of cable, which is usually wrapped with a complete insulation protection layer, and there is no exposed conductor end. The direct connection joint cannot effectively transmit the high voltage of the test machine to the conductor inside the joint, resulting in the failure of the test loop to form, and the voltage withstand test cannot be carried out. Therefore, we first connect the detection pre-cable 8 at the end of the cable intermediate joint assembly 9, and then connect the detection device through the second conductor 507 in the detection pre-cable 8 for detection. The pre-cable for pre-detection can provide a reliable conductor connection point, ensuring that the high voltage of the test machine can be effectively applied to the conductor inside the joint. At the same time, the pre-cable for pre-detection can make the high voltage uniformly act on the overall insulation structure of the joint, including the transition insulation layer of the joint and the original cable, avoiding local false breakdown caused by concentrated electric field due to direct pressure on the joint, and forming a stable loop through the pre-cable and the grounding end to accurately measure the leakage current, thereby truly reflecting the insulation withstand capability of the intermediate joint.

[0022] Please refer to Figure 1 and Figure 2 A high-voltage unconventional cross-section cable accessory and its detection device are shown in the drawings, which include a pressurizing mechanism 1, a pressurizing mechanism 1 for amplifying voltage, and a control mechanism 11 electrically connected to the side of the pressurizing mechanism 1. The control mechanism 11 is responsible for the start and stop of the entire test process, parameter setting, and process control. The other side of the pressurizing mechanism 1 is electrically connected to a connecting line 2, and the inside of the connecting line 2 is wrapped with three detection device wires 3, two of which are ground wires, and one is a pressurized detection wire. For unconventional cross-section high-voltage cables, such as high-voltage cables with a flat cross-section designed to fit the installation environment, in order to better balance the electric field distribution and avoid concentrated electric field at the corners of the rectangular conductor shape, improve insulation reliability, the cable core inside can be divided into multiple strands. When the pressurized detection wire is connected to one of the second conductors 507 for detection, the other second conductors 507 remain connected to the ground wire through the other two detection device wires 3. Because when a single strand is subjected to high voltage, the other cable cores that are not grounded will generate a floating high voltage due to electromagnetic induction, which may be much higher than its insulation withstand value, causing false breakdown, or interfering with the leakage current measurement and causing the results to be distorted. Grounding the remaining strands can guide the induced voltage to the ground, eliminating cross-interference and ensuring that the high voltage only acts on the target cable core for accurate performance testing, avoiding missed detection or misjudgment.

[0023] The existing device is usually used to clamp the cable conductor by using the connecting clamp when detecting, which is used to transmit high voltage of the detection device to the pre-connected cable and the cable accessory for detection. However, when the internal multiple cable cores need to follow the operation specification of single-core detection and the remaining cores grounding, multiple connecting clamps are used to connect the cable cores to be detected and the cable cores to be grounded. If the connecting clamp of the grounding wire is not connected stably or is missed due to improper operation of the operator, the detection is started with high voltage. In this state, the non-detection cable core cannot effectively guide the induced high voltage into the ground, and the suspended potential is formed between the cable cores, which may sharply increase with the high voltage applied to the detection cable core. Not only will it interfere with the accurate measurement of the leakage current, but also it may break the insulation gap between the cable cores and cause internal discharge, damaging the cable body.

[0024] Moreover, the spacing between the cable cores is small, the volume of the connecting clamp is relatively large, and the exposed part of the clamp body is more. When the multiple cable cores are respectively grounded and connected for detection, the connecting clamps are easily touched each other due to the limited operation space, compact arrangement, external force touch, such as detection wire pulling, etc. This touch will directly cause the short circuit between the detection cable core and the grounding cable core, and form a direct loop between the high voltage output end and the ground, which will instantly generate a huge short circuit current. This current not only will break the overcurrent protection elements of the detection device, such as fuse and relay, causing the damage of the testing machine, but also may generate arc in the short circuit moment, burning the cable conductor and the insulation layer, causing permanent damage to the cable.

[0025] Therefore, in order to solve the above problems caused by misconnection, missing connection or mutual touch of the connecting parts when detecting the unconventional cross-section cable accessory, the present application makes the following improvements.

[0026] Please refer to Figure 2 As shown in the figure, the end of the detection device wiring 3 is provided with a connecting assembly 5, the outside of the connecting assembly 5 is provided with a limiting bottom plate 4, the side of the limiting bottom plate 4 is fixedly connected with a detection pre-connected cable 8, the inside of the detection pre-connected cable 8 is wrapped with three cable cores 6, and the cable cores 6 are clamped and connected in the inside of the limiting bottom plate 4. The inside of the limiting bottom plate 4 is pre-provided with a clamping groove for limiting and fixing the cable cores 6, and the cable cores 6 stripped from the detection pre-connected cable 8 can be separated and arranged, so that the spacing between the cable cores 6 is maintained, and the limiting bottom plate 4 is made of insulating material, which can effectively prevent the mutual influence between the cable cores 6 during the test.

[0027] Please refer to Figure 2 and Figure 9As shown, the physical isolation of the recess in the limiting bottom plate 4 can define an independent space for each group of cable cores 6 and the connecting assembly 5, so as to avoid mutual contact due to position deviation or external disturbance during connection, tightening or operation; this design can cut off the accidental conduction path between different contact points, effectively prevent short circuit, arc discharge and other problems caused by mutual contact, and reduce the safety risk of electric shock, thereby further ensuring the safety and stability during operation.

[0028] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6 , the connecting assembly 5 includes a first conductor 501, which is an internal conductor of the detection device wire 3, and the end of the first conductor 501 is integrally connected with a conductive sheet 504. The connecting assembly 5 further includes a second conductor 507, which is an internal conductor of the cable core 6. The part of the second conductor 507 extending out of the cable core 6 is wrapped inside the conductive sheet 504. The outside of the conductive sheet 504 has an annular array of tightening strips 505. One end of the tightening strip 505 is fixedly connected with a rotating ring 503, and the other end of the tightening strip 505 is fixedly connected with a fixed ring 509. The outside of the first conductor 501 is fixedly connected with a rotating protrusion 502. The rotating ring 503 is rotatably connected to the outside of the rotating protrusion 502. When the rotating ring 503 is rotated, the tightening strip 505 is rotated and tightened, tightly attaching the conductive sheet 504 to the outer wall of the second conductor 507. At the same time, during the rotation and tightening of the tightening strip 505, the first conductor 501 approaches the second conductor 507, and the end faces of the two are tightly attached.

[0029] When detecting, each group of connecting assemblies 5 is respectively inserted into the outside of each group of second conductors 507, the fixed ring 509 is fixedly connected with the limiting fixed plug 508 away from one side of the tightening strip 505, the limiting fixed plug 508 is symmetrically provided with two limiting fixed plugs 508 about the vertical central axis of the fixed ring 509, the limiting fixed plug 508 is inserted into the corresponding slot in the inside of the limiting bottom plate 4, and the limiting fixed plug 508 is used for limiting and fixing the fixed ring 509, so that the fixed ring 509 cannot rotate. The bottom of the rotating ring 503 is provided with a driving assembly 7, and the driving assembly 7 is used for driving the rotating ring 503 to rotate. At this time, the driving assembly 7 drives each group of rotating rings 503 to rotate synchronously. When the rotating ring 503 rotates, the end of the tightening strip 505 close to the rotating ring 503 rotates together, and the end of the tightening strip 505 close to the fixed ring 509 cannot rotate due to the limitation of the fixed ring 509. At this time, the tightening strip 505 is twisted like twisting a doughnut. The tightening strip 505 is twisted and tightened while extruding the conductive sheet 504, so that the conductive sheet 504 is tightly attached to the outer wall of the second conductor 507. At the same time, since the originally straight tightening strip 505 gradually becomes a spiral tightening strip 505, and the distance between the two ends gradually decreases, the first conductor 501 gradually approaches the position of the second conductor 507, and the end surface of the first conductor 501 is tightly attached to the end surface of the second conductor 507.

[0030] The shape of the conductive sheet 504 is arc-shaped, and the conductive sheet 504 is symmetrically provided with two groups about the horizontal central axis of the second conductor 507. By tightening the annular array of the tightening strip 505, the two groups of conductive sheets 504 can be tightly attached to the outer wall of the second conductor 507. The arc-shaped structure of the conductive sheet 504 fits the cylindrical profile of the second conductor 507, which maximizes the attachment range of the conductive sheet 504 and the outer wall of the second conductor 507, avoiding the limitations of traditional alligator clips with point contact or line contact, effectively ensuring sufficient contact area; at the same time, when the annular array of the tightening strip 505 is tightened, the tightening strip 505 will uniformly apply centripetal pressure in the circumferential direction. This circumferential uniform stress mode can synchronously transmit pressure to the two conductive sheets 504, ensuring that the force of each contact point between the conductive sheet 504 and the outer wall of the second conductor 507 is consistent, thereby realizing the uniformity of contact pressure.

[0031] Sufficient contact area and uniform pressure greatly reduce the contact resistance, which not only reduces the resistance loss and local heating in the current conduction process, avoids the aging or arc discharge of the insulating material due to overheating, but also eliminates the current distribution imbalance caused by uneven pressure, improves the accuracy of detection data; in terms of connection stability and safety, uniform pressure makes the conductive sheet 504 and the second conductor 507 form a stable clamping, which is not easy to loosen due to external disturbance, avoiding the risk of unstable grounding and connection falling off, and further ensuring the safety of operation in high-voltage detection scenarios.

[0032] The outer part of the tightening strip 505 is wrapped with a protective sleeve 506, one end of the protective sleeve 506 is fixedly connected with the rotating ring 503, and the other end of the protective sleeve 506 is fixedly connected with the fixing ring 509. The inner tightening strip 505 can provide sufficient structural strength and toughness to ensure that the centripetal pressure can be stably generated during the tightening process, drive the arc-shaped conductive sheet 504 to closely fit the second conductor 507, meet the mechanical tightening force requirement, and is not easy to bend and break, thereby ensuring the stability of the connection. The protective sleeve 506 wrapped on the outside is made of insulating material, which can effectively isolate the current and further prevent mutual influence between each connection.

[0033] Please refer to Figure 7 As shown in FIG. 7, the driving assembly 7 includes a gear ring 701, which is sleeved on the outer wall of the rotating ring 503 and fixedly connected between the rotating ring 503. The bottom of the gear ring 701 is engaged with a gear rack 702, the bottom of the gear rack 702 is fixedly connected with a sliding block 704, and the sliding block 704 is slidingly connected in the inner part of the limiting bottom plate 4. The end of the gear rack 702 is fixedly connected with an anti-escape block 705, the top of the anti-escape block 705 is clamped and connected with a limiting socket 703, and the top of the limiting bottom plate 4 is rotatably connected with a sealing cover 10. The limiting socket 703 is fixedly connected to the side of the sealing cover 10; after the connecting assembly 5 is sleeved outside the second conductor 507, the rotating ring 503 is pressed downward, so that the gear ring 701 is engaged above the gear rack 702, then the gear rack 702 is pulled, the gear rack 702 slides outward through the sliding block 704, and at the same time, the rotating ring 503 is rotated through the engagement relationship with the gear ring 701, thereby realizing the rotation and tightening of the tightening strip 505. When the cylinder formed by the annular array of the tightening strip 505 is tightened, that is, each first conductor 501 is stably connected with the second conductor 507, the sealing cover 10 is closed, the limiting socket 703 is clamped above the anti-escape block 705, the pulled gear rack 702 is limited and fixed, and at the same time, the rotating ring 503 is locked and fixed through the gear ring 701, thereby preventing the reverse rotation from affecting the stability of the connection.

[0034] The stable connection between each group of connecting assemblies 5 and the cable core 6 can be realized by pulling the gear rack 702. This design replaces manual operation with unified driving, which avoids the problems of insufficient contact pressure and loose connection caused by uneven force and deviation of fitting angle during manual operation, thereby ensuring the consistency and stability of all connection points from a mechanical level. In addition, this design eliminates the mistake of missing some groups of connecting assemblies 5 and cable cores 6 in manual operation, thereby ensuring reliable connection between each group of connecting assemblies 5 and the cable core 6, effectively avoiding local heating, distorted detection data, circuit abnormalities, equipment damage, and even electric shock caused by unstable single connection, thereby greatly improving the safety and reliability of the operation.

[0035] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should all belong to the protection scope of the present application.

Claims

1. A high voltage non-conventional cross-section cable accessory detection device, characterized in that, The utility model provides a kind of pressure detection device, including pressurizing mechanism, the side of the pressurizing mechanism is electrically connected with control mechanism, the other side of the pressurizing mechanism is electrically connected with connecting wire, the inside of the connecting wire is wrapped with three detection device wires, two detection device wires are ground wire, and one detection device wire is pressure detection lead wire, the end of the detection device wire is equipped with connecting assembly, the outside of the connecting assembly is provided with limit base plate, the side of the limit base plate is fixedly connected with detection preconnection cable, the inside of the detection preconnection cable is wrapped with three cable cores, and cable core is engagedly connected in the inside of limit base plate;Connecting assembly includes first conductor, the first conductor is the conductor in the inside of detection device wire, the end of the first conductor is integrally connected with conducting sheet, the connecting assembly further includes second conductor, and the second conductor is the conductor in the inside of cable core, the part of the second conductor extending out of cable core is wrapped in the inside of conducting sheet, the outside of the conducting sheet is annular array with tightening strip, one end of the tightening strip is fixedly connected with rotating torus, and the other end of the tightening strip is fixedly connected with fixed ring, when rotating rotating torus, tightening strip is rotated and tightened, conducting sheet is tightly attached to the outer wall of second conductor, and in the process of rotating and tightening of tightening strip, first conductor is close to second conductor, and the end face of the two is tightly attached.

2. The high voltage non-conventional cross-section cable accessory detection device according to claim 1, characterized in that: The shape of the conducting sheet is arc-shaped, and the conducting sheet is symmetrically provided with two groups about the horizontal central axis of the second conductor.

3. The high voltage non-conventional cross-section cable accessory detection device of claim 1, wherein: The outside of the tightening strip is wrapped with a protective sleeve, one end of the protective sleeve is fixedly connected with the rotating torus, and the other end of the protective sleeve is fixedly connected with the fixed ring.

4. The high voltage non-conventional cross-section cable accessory detection device of claim 1, wherein: The outside of the rotating convex block is fixedly connected with the rotating torus.

5. The high voltage non-conventional cross-section cable accessory detection device of claim 1, wherein: The side of the fixed ring away from the tightening strip is fixedly connected with a limit fixed plug, the limit fixed plug is symmetrically provided with two about the vertical central axis of the fixed ring, and the limit fixed plug is inserted into the inside of the limit base plate for limiting and fixing the fixed ring.

6. The high voltage non-conventional cross-section cable accessory detection device of claim 1, wherein: The bottom of the rotating torus is provided with a driving assembly for driving the rotating torus to rotate.

7. The high voltage non-conventional cross-section cable accessory detection device according to claim 6, characterized by: The driving assembly includes a gear ring, the gear ring is sleeved on the outer wall of the rotating torus, and the gear ring is fixedly connected with the rotating torus.

8. The high voltage non-conventional cross-section cable accessory detection device according to claim 7, characterized by: The bottom of the gear ring is engaged with a rack, the bottom of the rack is fixedly connected with a sliding block, and the sliding block is slidingly connected in the inside of the limit base plate.

9. The high voltage non-conventional cross-section cable accessory detection device according to claim 8, characterized in that: The end of the rack is fixedly connected with an anti-dropping block, the top of the anti-dropping block is clamped and connected with a limit bayonet, the top of the limit base plate is rotatably connected with a sealing cover, and the limit bayonet is fixedly connected to the side of the sealing cover.

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