Cable detection device applied to electric power installation engineering and operation method thereof

Abstract

The embodiment of the invention provides a cable detection device applied to electric power installation engineering and an operation method thereof, and relates to the technical field of cable detection. The cable detection device applied to the electric power installation engineering comprises a machine body, a cable fixing frame, a grounding device and a withstand voltage tester, the cable fixing frame is embedded in the machine body, the withstand voltage tester is arranged on the machine body, the grounding device is connected with the cable fixing frame, and the cable fixing frame is spiral. Through the arrangement of the spiral cable fixing frame and the liftable spiral frame, the cables can be orderly stored and fixed in the spiral groove and the cable clamp, the problem that the multiple cables are mutually crossed or wound in the testing process is effectively solved, and the testing interference and misjudgment risks caused by disordered cable layout are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and specifically refers to a cable detection device and its operation method applied to electrical installation projects. Background Art

[0002] As a core component for power transmission and signal transfer, the insulation performance of cables is directly related to the safety and reliability of the power system. To ensure that cables can withstand the rated voltage and possible overvoltage impacts during actual use, it is usually necessary to conduct a withstand voltage test on them. The withstand voltage test applies a high voltage higher than the normal operating voltage to detect whether there are defects, aging, or breakdown risks in the cable insulation layer, so as to verify whether its dielectric strength meets the design requirements. Existing testing methods mostly use high-voltage generating devices (such as withstand voltage testers or transformers) to apply high voltage between the cable conductor and the insulation layer, and judge the insulation performance by monitoring the leakage current or observing the breakdown phenomenon. However, the applicability of traditional testing equipment and methods in complex scenarios still has limitations. Especially when multiple cables are detected simultaneously, it is difficult to balance the testing efficiency and safety.

[0003] During the actual cable testing process, especially in projects with dense wiring or long-distance transmission, multiple cables often cross or wind around each other, forming a complex physical layout. If the insulation layer of the cable is broken down by high voltage during testing, it may lead to short circuits, discharges, or even fires between adjacent cables. For example, when the insulation of one cable fails, the high-voltage arc may spread to surrounding cables, damaging their insulation structure and further causing electrical faults in the entire system. In addition, the crossed or wound cables may also cause inaccurate measurement of leakage current due to electric field interference during testing, further increasing the risk of misjudgment. Therefore, how to safely and efficiently complete the withstand voltage test in a multi-cable crossing environment and avoid the chain hazards caused by insulation breakdown has become a technical problem to be solved urgently. Summary of the Invention

[0004] According to an embodiment of the present invention, a cable detection device applied to electrical installation projects is provided. It is used to solve the problems raised in the above background art.

[0005] In the first aspect of the present invention, a cable detection device applied to electrical installation projects is provided.

[0006] The cable detection device applied to electrical installation projects includes: a machine body, a cable fixing frame, a grounding device, and a withstand voltage tester. The cable fixing frame is embedded inside the machine body, the withstand voltage tester is arranged on the machine body, the grounding device is connected to the cable fixing frame, and the cable fixing frame is spiral.

[0007] Preferably, the cable fixing bracket includes a base, a rotating rod, a spiral bracket and a sleeve. The sleeve is embedded inside the machine body. A cover body is provided at the upper end of the sleeve. The rotating rod is threadedly connected to the cover body. A notch for the spiral bracket to extend out is formed on the cover body. Both the spiral bracket and the rotating rod are fixedly connected to the base. The base is slidably connected to the sleeve. The thread on the rotating rod matches the spiral bracket. The spiral bracket is used to carry the cable.

[0008] Preferably, a cable clamp for clamping the cable is provided on the spiral bracket. The cable clamp is made of insulating material and is U-shaped.

[0009] Preferably, a temperature sensor is provided on the cable clamp.

[0010] Preferably, a convex block is provided on the lower surface of the cover body. Limiting parts extend from both sides of the convex block. A guiding surface is provided on the convex block.

[0011] Preferably, the cover body is spiral.

[0012] Preferably, a handle is provided at the upper end of the rotating rod.

[0013] Preferably, a fixing component is further included. The fixing component includes an arc-shaped plate, a fixing ring and a locking screw. The arc-shaped plate is fixedly installed on the base. The fixing ring is fixedly connected to the arc-shaped plate. The arc-shaped plate is connected to the grounding device. The locking screw passes through the fixing ring and is threadedly connected to the fixing ring. One side of the fixing ring opposite to the locking screw is V-shaped. A locking head is provided at one end of the locking screw extending into the fixing ring.

[0014] Preferably, a maintenance door is provided on the machine body.

[0015] In the second aspect of the present invention, an operation method of a cable detection device applied to an electric power installation project is provided.

[0016] The method includes: fixing one end of the cable to the grounding device and connecting it to the spiral cable fixing bracket, and connecting the other end to the withstand voltage tester; adjusting the height of the cable fixing bracket by rotating the rotating rod of the cable fixing bracket and fixing the cable; applying high voltage by using the withstand voltage tester to perform a withstand voltage test to detect the insulation performance of the cable.

[0017] One or more technical solutions provided in the present application have at least the following technical effects or advantages:

[0018] A cable detection device applied to electrical installation projects provided by the present invention, by setting a spiral cable fixing frame and its liftable spiral frame, the cables can be orderly stored and fixed in the spiral groove and cable clips, effectively solving the problem of multiple cables crossing or winding each other during the test, and reducing the test interference and misjudgment risk caused by the chaotic cable layout.

[0019] The collaborative design of the convex block, the limiting part and the guiding surface, as well as the locking structure of the fixing component, ensure that the cable is firmly fixed during the test, avoiding loosening or falling off. If the cable insulation layer is punctured, the fixed cable will not cause short circuit or arc discharge between adjacent cables due to position deviation, significantly reducing the occurrence probability of dangerous situations such as fires or system failures described in the background art.

[0020] The adjustment mechanism of the rotating rod and the handle makes the operation of fixing and releasing the cable simple and fast. With the integrated detection function of the withstand voltage tester and the temperature sensor, it can quickly complete the monitoring of insulation performance and temperature anomalies. Compared with the inefficiency of traditional test methods in complex scenarios, the present invention significantly improves the detection efficiency.

[0021] It should be understood that the content described in the summary of the invention is not intended to limit the key or important features of the embodiments of the present invention, nor to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Combined with the drawings and referring to the following detailed description, the above and other features, advantages and aspects of the embodiments of the present invention will become more obvious. In the drawings, the same or similar reference numerals represent the same or similar elements, where:

[0023] Figure 1 Shows a three-dimensional structural schematic diagram of a cable detection device applied to electrical installation projects according to an embodiment of the present invention;

[0024] Figure 2 Shows a three-dimensional structural schematic diagram of a cable fixing frame of a cable detection device applied to electrical installation projects according to an embodiment of the present invention;

[0025] Figure 3 Shows a front view structural schematic diagram of a cable fixing frame of a cable detection device applied to electrical installation projects according to an embodiment of the present invention;

[0026] Figure 4 Shows a three-dimensional structural schematic diagram of a spiral frame of a cable detection device applied to electrical installation projects according to an embodiment of the present invention;

[0027] Figure 5Shows a three-dimensional structural schematic diagram of a cable clamp of a cable detection device applied to an electrical installation project according to an embodiment of the present invention;

[0028] Figure 6 Shows a three-dimensional structural schematic diagram of a cover body of a cable detection device applied to an electrical installation project according to an embodiment of the present invention;

[0029] Figure 7 Shows a partial structural schematic diagram of a cable fixing frame of a cable detection device applied to an electrical installation project according to an embodiment of the present invention;

[0030] Figure 8 Shows a three-dimensional structural schematic diagram of a fixing component of a cable detection device applied to an electrical installation project according to an embodiment of the present invention.

[0031] Description of reference numerals

[0032] 1 - Body, 11 - Maintenance door, 2 - Cable fixing frame, 21 - Base, 22 - Rotating rod, 221 - Handle, 23 - Screw frame, 24 - Sleeve, 241 - Cover body, 242 - Notch, 243 - Protrusion, 244 - Limiting part, 245 - Guide surface, 25 - Cable clamp, 26 - Temperature sensor, 3 - Grounding device, 4 - Withstand voltage tester, 5 - Fixing component, 51 - Arc plate, 52 - Fixing ring, 53 - Locking screw, 531 - Locking head. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0034] In addition, the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0035] Such as Figures 1 to 8As shown in the figure, the cable detection device applied to the electrical installation project aims to solve the safety hazard problems caused by winding or crossing during the cable testing process and improve the detection efficiency. The device includes a body 1, a cable fixing frame 2, a grounding device 3, and a withstand voltage tester 4. The body 1 serves as an overall support structure for carrying various components; the cable fixing frame 2 is embedded inside the body 1 for fixing the cable to be tested and preventing it from winding; the withstand voltage tester 4 is fixedly arranged on the upper surface of the body 1 for generating high voltage and detecting the insulation performance of the cable; the grounding device 3 is connected to the cable fixing frame 2 for grounding one end of the cable to form a test circuit. The cable fixing frame 2 adopts a spiral design, which can orderly store the cable and adjust its position.

[0036] During use, one end of the cable to be tested is inserted into the grounding device 3 to make it reliably connected to the grounding system. Subsequently, the cable is placed on the cable fixing frame 2 and fixed by adjusting the structure of the cable fixing frame 2. Then, the other end of the cable is connected to the high-voltage output terminal of the withstand voltage tester 4, and a preset high voltage (such as 2.5 kV or 5 kV, specifically determined according to the cable specifications) is applied through the withstand voltage tester 4 to conduct a withstand voltage test on the cable. During the test, the withstand voltage tester 4 monitors the leakage current or breakdown phenomenon to determine whether the dielectric strength of the cable insulation layer is qualified.

[0037] In this embodiment, the cable fixing frame 2 includes a base 21, a rotating rod 22, a spiral frame 23, and a sleeve 24. The sleeve 24 is a cylindrical structure embedded and fixed inside the body 1, and a cover 241 is provided at its upper end. The cover 241 is fixedly connected to the sleeve 24 by bolts or welding. A rectangular or arc-shaped notch 242 is provided on the cover 241 for the spiral frame 23 to extend or retract. The rotating rod 22 is a cylindrical rod with external threads. Its upper end passes through the cover 241 and is threadedly engaged with the cover 241, and its lower end is fixedly connected to the base 21, for example, firmly combined by welding or key connection. The spiral frame 23 is a support structure made of spiral metal or high-strength plastic. Its inner diameter matches the diameter of the cable to be tested. Its bottom is fixedly connected to the base 21, and its upper end can extend through the notch 242. The base 21 is a circular or square plate-like structure that slidably cooperates with the inner wall of the sleeve 24, for example, sliding up and down through a chute or a guide rail. The thread pitch on the rotating rod 22 matches the spiral pitch of the spiral frame 23 to ensure synchronous movement of the two.

[0038] During use, the rotating rod 22 is rotated manually or by a power tool. Since the rotating rod 22 is threadedly connected to the cover body 241, its rotation will drive the base 21 and the spiral frame 23 to move up and down along the axial direction of the sleeve 24. When the rotating rod 22 rotates clockwise, the base 21 and the spiral frame 23 move upward, and the spiral frame 23 extends out of the sleeve 24 in a spiral manner through the notch 242; when rotated counterclockwise, the spiral frame 23 retracts into the sleeve 24. In this way, the height of the base 21 can be adjusted to a suitable position. After the adjustment is in place, one end of the cable is inserted into the grounding device 3 and fixed, and then the rotating rod 22 is rotated counterclockwise to lower the base 21 and the spiral frame 23, and the cable is wound and fixed in the spiral groove of the spiral frame 23. At this time, the spiral frame 23 neatly stores the cable, preventing the cable from being entangled or crossed with each other during the test, thereby reducing the risk of short circuit or arc caused by insulation breakdown.

[0039] Further, a plurality of cable clips 25 are provided on the spiral frame 23 for enhancing the fixing effect of the cable. The cable clip 25 is made of an insulating material (such as polytetrafluoroethylene or rubber), has a U-shaped structure, its open end faces upward, and has an elastic clamping force inside, which can firmly clamp the cable without damaging its surface. The cable clips 25 are evenly distributed along the spiral path of the spiral frame 23. For example, one is provided every 10 cm, and the specific number is determined according to the cable length. During use, the cable is inserted into the U-shaped groove of the cable clip 25, and clamping fixation is achieved through elastic deformation.

[0040] In this embodiment, a temperature sensor 26 is also integrated on the cable clip 25. The temperature sensor 26 is preferably a thermistor or an infrared temperature measuring element, embedded in the inner wall of the cable clip 25, in direct contact with the cable surface, and is used to monitor the temperature change of the energized cable during the withstand voltage test in real time. The temperature sensor 26 is connected to an external display or the control unit of the withstand voltage tester 4 through a wire. When the cable temperature exceeds a preset threshold (such as 70 °C), an alarm signal can be triggered to prompt the operator to check whether there are problems such as overheating or insulation deterioration of the cable, thereby further improving the test safety.

[0041] In this embodiment, to further improve the stability and guiding property of the cable during the fixing process, a convex block 243 is provided on the lower surface of the cover body 241. The convex block 243 is a protruding structure extending circumferentially along the lower surface of the cover body 241, and its cross-section is trapezoidal or semi-circular. Limiting portions 244 extend outward from both sides of the convex block 243. The limiting portions 244 are side wall structures parallel to the convex block 243 and have a height lower than that of the convex block 243, and are used to limit the lateral displacement of the cable. A guiding surface 245 is provided on the upper surface of the convex block 243. The guiding surface 245 is an inclined plane or an arc surface, and smoothly transitions from the top of the convex block 243 to the limiting portions 244 on both sides. During the rotation of the spiral frame 23, the cable is clamped by the cable clamp 25. As the spiral frame 23 continues to rotate, the cable clamp 25 drives the cable to contact the guiding surface 245 of the convex block 243. The guiding surface 245 guides the cable to slide in an inclined direction, and at the same time, the limiting portions 244 prevent the cable from shifting to both sides. As the spiral frame 23 further rotates, the cable is pressed into the U-shaped groove of the cable clamp 25 under the pressing action of the convex block 243, thereby realizing the firm fixing of the cable and avoiding the cable from loosening or falling off during the test.

[0042] In this embodiment, the cover body 241 is designed as a spiral structure, and its spiral direction and pitch are the same as those of the spiral frame 23. The spiral design of the cover body 241 not only matches the movement track of the spiral frame 23, but also can provide additional space to accommodate the cable when the spiral frame 23 moves up and down, further reducing the risk of friction or entanglement between the cable and other components. The cover body 241 is fixed to the upper end of the sleeve 24 by bolts or buckles to ensure the structural stability.

[0043] In this embodiment, to facilitate the operator to manually adjust the rotating rod 22, a handle 221 is provided at the upper end of the rotating rod 22. The handle 221 is preferably a T-shaped or disc-shaped structure and is fixed to the top of the rotating rod 22 by welding or threading. Anti-slip textures can be provided on its surface to improve the holding force and rotation efficiency during operation. During use, the operator drives the rotating rod 22 to rotate by turning the handle 221, and then drives the base 21 and the spiral frame 23 to move up and down, realizing the rapid fixing or loosening of the cable.

[0044] In this embodiment, a fixing component 5 is further included, which is used to enhance the connection reliability between the cable and the grounding device 3. The fixing component 5 includes an arc-shaped plate 51, a fixing ring 52, and a locking screw 53. The arc-shaped plate 51 is an arc-shaped metal plate, which is fixedly installed on the upper surface of the base 21 by bolts or welding. Its arc design is adapted to the shape of the cable and is used to support the cable. The fixing ring 52 is a circular ring structure, which is fixedly connected to the end of the arc-shaped plate 51, for example, by integral molding or welding. Threaded holes are provided on the inner side wall of the fixing ring 52. The other end of the arc-shaped plate 51 is connected to the grounding device 3, for example, by a wire or a metal conductor to be connected to the grounding system, ensuring reliable grounding of the cable. The locking screw 53 is a rod with an external thread, which passes through the threaded hole of the fixing ring 52 and is in threaded cooperation with the fixing ring 52. The side of the fixing ring 52 opposite to the locking screw 53 is designed as a V-shaped opening, which is convenient for the cable to be inserted and positioned. A locking head 531 is provided at one end of the locking screw 53 extending into the fixing ring 52. The locking head 531 is a conical or flat structure, and its surface can be covered with a rubber pad to increase friction and avoid damaging the outer skin of the cable. During use, one end of the cable is inserted into the grounding device 3 and passes through the V-shaped opening of the fixing ring 52, and then the locking screw 53 is rotated to make it move telescopically along the threaded hole of the fixing ring 52. When the locking screw 53 is screwed forward tightly, the locking head 531 presses tightly against the cable, firmly pressing the cable against the V-shaped inner wall of the fixing ring 52, realizing stable fixation of the cable.

[0045] In this embodiment, a maintenance door 11 is provided on the machine body 1 to facilitate the maintenance and inspection of internal components. The maintenance door 11 is located on the side wall or the top surface of the machine body 1, preferably in a rectangular or circular structure, and is connected to the machine body 1 by a hinge and is equipped with a lock or a bolt for fixation. The size of the maintenance door 11 is designed to be large enough to allow the operator's hand or tools to enter. For example, it is 20 cm wide and 30 cm high. After opening the maintenance door 11, the cable fixing bracket 2, the grounding device 3, and related circuits can be directly accessed, which is convenient for replacing damaged components, cleaning internal dust, or adjusting the position of the cable, thereby improving the maintenance efficiency and service life of the device.

[0046] The second aspect of the present invention provides an operation method for a cable detection device applied in a power installation project.

[0047] This embodiment provides an operation method for a cable detection device applied in a power installation project. This method uses the aforementioned device to perform a withstand voltage test on the cable to detect its insulation performance and avoid potential safety hazards caused by cable entanglement or crossing during the test process. This method includes the following steps:

[0048] Step 1: Prepare the cable and the detection device;

[0049] Remove or prepare the cable to be tested from the installation site, ensuring that the cable surface is clean, without obvious damage or stains. Check whether the body 1, cable fixing bracket 2, grounding device 3, and withstand voltage tester 4 of the cable detection device are in good condition, and confirm that the grounding device 3 is reliably connected to the on-site grounding system with a grounding resistance less than 4Ω. Open the inspection door 11 on the body 1, check whether there are foreign objects inside the cable fixing bracket 2, and clean them if any. Then close the inspection door 11.

[0050] Step 2: Adjust the height of the cable fixing bracket;

[0051] Drive the rotating rod 22 to rotate clockwise by turning the handle 221 at the upper end of the rotating rod 22. Since the rotating rod 22 is threadedly connected to the cover body 241, its rotation drives the base 21 and the screw frame 23 to slide upward along the inner wall of the sleeve 24, and the screw frame 23 extends spirally through the notch 242 on the cover body 241. Continue to rotate the handle 221 until the height of the screw frame 23 reaches a position suitable for placing the cable. For example, the top of the screw frame 23 is about 5 - 10 cm away from the cover body 241 to leave enough space to accommodate the cable.

[0052] Step 3: Fix the cable to the grounding device;

[0053] Insert one end of the cable to be tested into the grounding device 3 and pass through the V-shaped opening of the fixing ring 52 of the fixing assembly 5. Place the cable on the arc plate 51 so that it contacts the grounding terminal of the grounding device 3. Rotate the locking screw 53 to move it forward along the threaded hole of the fixing ring 52 until the locking head 531 of the locking screw 53 presses tightly against the cable, firmly fixing the cable within the fixing ring 52 to ensure stable electrical connection between the cable and the grounding system and avoid loosening or poor contact.

[0054] Step 4: Fix the cable to the screw frame;

[0055] Place the remaining part of the cable along the spiral path of the spiral frame 23 and embed it one by one into the U-shaped grooves of the cable clips 25 on the spiral frame 23. The cable clips 25 fix the cable through elastic clamping force to ensure that the cable fits the surface of the spiral frame 23. Then rotate the handle 221 counterclockwise to drive the rotating rod 22 to drive the base 21 and the spiral frame 23 to move downward. During this process, the cable clips 25 on the spiral frame 23 drive the cable to contact the guiding surface 245 of the bump 243 on the lower surface of the cover body 241. The guiding surface 245 guides the cable to slide along the inclined direction, and the limiting parts 244 on both sides of the bump 243 prevent the cable from shifting. As the spiral frame 23 continues to rotate and move downward, the cable is further pressed into the cable clip 25 under the extrusion of the bump 243, realizing the orderly storage and fixation of the cable and avoiding cable entanglement or crossing.

[0056] Step 5: Connect the cable to the withstand voltage tester;

[0057] Strip the outer skin of the other end of the cable to expose the conductor part and connect it to the high-voltage output terminal (HV) of the withstand voltage tester 4. Ensure a firm connection through a special wiring clip or terminal to avoid poor contact. The grounding terminal (GND) of the withstand voltage tester 4 is connected to the grounding device 3 through a wire to form a test circuit.

[0058] Step 6: Perform the withstand voltage test;

[0059] Start the withstand voltage tester 4 and set the test parameters. For example, the test voltage is 2.5 kV (applicable to cables with a rated voltage of 1 kV) and the test time is 60 seconds. Slowly adjust the voltage knob to gradually increase the voltage from 0 V to the target voltage, and observe the leakage current value and voltage value on the display screen of the withstand voltage tester 4. During the test, the temperature sensor 26 monitors the temperature of the cable in the cable clip 25 in real time. If the temperature exceeds the preset threshold (such as 70 °C), the withstand voltage tester 4 emits an alarm signal to prompt the operator to pause the test. If the leakage current is less than the standard limit (such as 50 μA) and there is no breakdown phenomenon, it is determined that the insulation performance of the cable is qualified; if the leakage current exceeds the standard or breakdown occurs (such as the current suddenly increases to the mA level), it is determined to be unqualified.

[0060] Step 7: End the test and clean up;

[0061] After the test is completed, slowly reduce the output voltage of the withstand voltage tester 4 to 0V and turn off the power supply. Discharge the cable with a grounding rod to ensure that there is no residual voltage. Loosen the terminal clamp on the withstand voltage tester 4 and remove the cable connection. Rotate the handle 221 clockwise to raise the screw frame 23 and take out the cable from the cable clamp 25. Rotate the locking screw 53 counterclockwise to loosen the fixing ring 52 and take out the cable from the grounding device 3. Sort out the test data and record the leakage current, temperature and test results.

[0062] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable detection device applied to electrical installation engineering, characterized in that, It includes a body (1), a cable fixing bracket (2), a grounding device (3) and a withstand voltage tester (4). The cable fixing bracket (2) is embedded inside the body (1), the withstand voltage tester (4) is arranged on the body (1), the grounding device (3) is connected to the cable fixing bracket (2), and the cable fixing bracket (2) is spiral.

2. The cable detection device applied to the power installation project according to claim 1, characterized in that, The cable fixing bracket (2) includes a base (21), a rotating rod (22), a spiral bracket (23) and a sleeve (24). The sleeve (24) is embedded inside the body (1). A cover body (241) is arranged at the upper end of the sleeve (24). The rotating rod (22) is threadedly connected to the cover body (241). A notch (242) for the spiral bracket (23) to extend out is formed on the cover body (241). Both the spiral bracket (23) and the rotating rod (22) are fixedly connected to the base (21). The base (21) is slidably connected to the sleeve (24). The thread on the rotating rod (22) matches the spiral bracket (23). The spiral bracket (23) is used for carrying cables.

3. The cable detection device applied to the electrical installation project according to claim 2, wherein, A cable clamp (25) for clamping the cable is arranged on the spiral bracket (23). The cable clamp (25) is made of insulating material and is U-shaped.

4. The cable detection device applied to the electrical installation project according to claim 3, characterized in that, A temperature sensor (26) is arranged on the cable clamp (25).

5. The cable detection device applied to the electrical installation project according to claim 3, characterized in that, A convex block (243) is arranged on the lower surface of the cover body (241). Limiting parts (244) extend from both sides of the convex block (243). A guiding surface (245) is arranged on the convex block (243).

6. The cable detection device applied to the electrical installation project according to claim 2, wherein The cover body (241) is spiral.

7. The cable detection device applied to the electrical installation project according to claim 2, characterized in that, A handle (221) is arranged at the upper end of the rotating rod (22).

8. The cable detection device applied to the power installation project according to claim 2, characterized in that, It further includes a fixing component (5). The fixing component (5) includes an arc-shaped plate (51), a fixing ring (52) and a locking screw (53). The arc-shaped plate (51) is fixedly installed on the base (21). The fixing ring (52) is fixedly connected to the arc-shaped plate (51). The arc-shaped plate (51) is connected to the grounding device (3). The locking screw (53) passes through the fixing ring (52) and is threadedly connected to the fixing ring (52). One side of the fixing ring (52) opposite to the locking screw (53) is V-shaped. A locking head (531) is arranged at one end of the locking screw (53) extending into the fixing ring (52).

9. The cable detection device applied to the electrical installation project according to claim 1, characterized in that An inspection door (11) is arranged on the body (1).

10. An operation method of a cable detection device applied to an electric power installation project, characterized in that, The implementation of this method depends on the cable detection device applied to the electrical installation project described in claims 1 to 9, including fixing one end of the cable to the grounding device (3) and connecting it to the spiral cable fixing bracket (2), and connecting the other end to the withstand voltage tester (4); adjusting the height of the cable fixing bracket (2) by rotating the rotating rod (22) of the cable fixing bracket (2) and fixing the cable; applying a high voltage by using the withstand voltage tester (4) to conduct a withstand voltage test and detect the insulation performance of the cable.

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