Insulation performance simulation detection device for high-voltage direct-current transmission line

Abstract

The invention discloses an insulating property simulation detection device for a high-voltage direct-current transmission line, which belongs to the technical field of high-voltage line detection and comprises an operation table and a line body. A power distribution component with a warning component is fixedly installed at the top end of the operation table, and the wire body is arranged at the top end of the operation table. The power distribution part is electrically connected with the to-be-detected wire body through the electric connection end. A protection mechanism is arranged at the top end of the operation table and comprises a shielding assembly arranged at the top end of the operation table. According to the invention, the shielding part formed by splicing a plurality of arc-shaped shielding plates is adopted, the high-frequency shielding interlayer with the pre-embedded conductive copper bar is integrally embedded in the shielding part, the electromagnetic shielding net is adhered to the outer surface of the shielding part through the conductive adhesive, and the bottom special grounding terminal is tightly connected with the pre-embedded conductive copper bar; and a multi-layer cooperative shielding structure with an outer shielding net, a middle high-frequency shielding interlayer and an inner conductive conduction layer is formed, so that the potential safety hazard of high-voltage detection is further reduced.

Description

Technical Field

[0001] This invention relates to the field of high-voltage power line testing technology, and in particular to a device for simulating and testing the insulation performance of high-voltage direct current transmission lines. Background Technology

[0002] As the core carrier of the power transmission system, the insulation performance of high-voltage direct current (HVDC) transmission lines directly determines the safety and stability of power transmission. Once the insulation layer is damaged, aged, or contaminated, it can easily lead to safety accidents such as leakage, short circuits, and even high-voltage discharge, causing significant economic losses and casualties. Therefore, accurate simulation testing of the insulation performance of HVDC transmission lines before commissioning and during operation and maintenance, and timely detection of insulation defects, are crucial for ensuring the safe and stable operation of the power system. Existing testing devices have poor shielding effects. Some devices only have simple protective shells, failing to consider the high-frequency electromagnetic signals, stray electromagnetic interference, and high-voltage leakage risks generated during high-voltage testing. Even those devices with shielding structures are often simple combinations of single-layer flat plates and grids, with gaps at the joints, a single shielding level, and no effective grounding structure. This fails to effectively block high-frequency electromagnetic interference, leading to distorted test signals and affecting the accuracy of insulation performance testing. Summary of the Invention

[0003] The purpose of this invention is to provide an insulation performance simulation and testing device for high-voltage direct current transmission lines, in order to solve the problems mentioned in the background art, such as gaps at the splicing of shielding structures, a single shielding level, and the lack of an effective grounding conduction structure.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an insulation performance simulation testing device for high-voltage direct current transmission lines, comprising an operating platform and a power line body. A power distribution component with warning elements is fixedly installed on the top of the operating platform, and the power line body is disposed on the top of the operating platform. The power distribution component electrically connects the power line body to be tested via an electrical connection terminal. A protective mechanism is provided on the top of the operating platform, the protective mechanism including a shielding component disposed on the top of the operating platform. The shielding component includes a support frame fixedly installed on one side of the operating platform, the support frame being rotatably mounted near the top of the power line body. The device is equipped with a shielding component, which consists of multiple arc-shaped shielding plates. The splicing surfaces of adjacent shielding plates are provided with conductive sealing strips. The top of the operating table is provided with a pressure-pressurizing component for limiting the position of the wire body. The pressure-pressurizing component includes a limiting plate installed on the top of the operating table. The outer surface of the limiting plate has multiple vent holes for air pressure balance adjustment. The inner wall of the limiting plate near the vent holes is provided with a breathable membrane. The internal cavity of the limiting plate is filled with several adsorption balls containing dry carbon powder. The adsorption balls are used to dehumidify the microenvironment between the limiting plate and the wire body.

[0005] As a preferred embodiment of the present invention, a cooling component is provided on one side of the operating table. The cooling component includes an air pump fixedly installed on the outside of the operating table. A lower cooling plate is fixedly installed on the outside of the shielding plate. An upper cooling pipe is connected to the top of the lower cooling plate. The output end of the air pump is connected to one end of the lower cooling plate through an air inlet pipe. The input end of the air pump is connected to the upper cooling pipe through an air outlet pipe. A refrigeration box is connected to the air inlet pipe through a connecting pipe.

[0006] As a preferred embodiment of the present invention, a filter plate is fixedly installed on the outer side of the support frame, and the filter plate is connected to the connecting pipe. The interior of the filter plate is filled with a filter screen for filtering scale.

[0007] As a preferred embodiment of the present invention, the surface of the support frame is provided with a wind pressure assembly. The wind pressure assembly includes a top block fixedly installed on the support frame near the surface of the wire body. An air suction pipe for adsorbing the messy gas around the wire body is fixedly installed on the outer surface of the top block. The air suction pipe is connected to the input end of the air pump through an auxiliary pipe.

[0008] As a preferred embodiment of the present invention, a plurality of locking rods are fixedly installed on the top of the operating table, and locking blocks are fixedly installed on the surface of the shielding plate, and the locking blocks are engaged with the ends of the locking rods. The shielding component is integrally formed with a high-frequency shielding interlayer with a pre-embedded conductive copper busbar. A dedicated grounding terminal is provided at the bottom of the shielding plate, and the terminal is tightly connected to the pre-embedded conductive copper busbar inside the shielding plate. An electromagnetic shielding mesh is pasted on the outer surface of the shielding component with conductive adhesive.

[0009] As a preferred embodiment of the present invention, a limiting mechanism is provided at the top of the operating table. The limiting mechanism includes a stabilizing component provided at the top of the operating table. The stabilizing component includes a rotating rod rotatably mounted at the top of the operating table. A motor is fixedly mounted at the top of the operating table. The output shaft of the motor is fixedly connected to the rotating rod. A pressure-applying component for limiting the movement of the wire body is provided on the outer surface of the rotating rod.

[0010] As a preferred embodiment of the present invention, the pressurizing component includes multiple limiting plates installed on the outer surface of the rotating rod, the wire body is disposed between the multiple limiting plates, the limiting plates are composed of multiple arc-shaped plates, and are used to limit the wire bodies of different models, and a buffer pad is fixedly installed on the surface of the limiting plate near the wire body.

[0011] As a preferred embodiment of the present invention, a plurality of friction plates are fixedly installed on the surface of the limiting plate near the wire body, and a sliding rod is fixedly installed on the surface of the friction plate, and the sliding rod slides through the interior of the limiting plate, and a spring is fixedly installed between the sliding rod and the inner wall of the limiting plate.

[0012] As a preferred embodiment of the present invention, the adsorption ball has a hollow mesh spherical structure, and the adsorption ball is in a free rolling state in the internal cavity of the limiting plate.

[0013] As a preferred embodiment of the present invention, a conductive component is provided at the top of the operating table. The conductive component includes a plurality of electric push rods fixedly installed at the top of the operating table. A conductive rod is fixedly installed at the output end of the electric push rod. A conductive block is electrically connected to the bottom end of the conductive rod, and the conductive block slides on the surface of the wire body. An elastic rope is provided between the conductive block and the conductive rod. The conductive rod is electrically connected to the ground wire through a pressure control component.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention employs a shielding component composed of multiple arc-shaped shielding plates spliced ​​together. Conductive sealing strips are installed at the splicing surfaces of adjacent shielding plates. An integrally formed high-frequency shielding interlayer with pre-embedded conductive copper busbars is embedded internally. An electromagnetic shielding mesh is adhered to the outer surface with conductive adhesive. A dedicated grounding terminal at the bottom is tightly connected to the pre-embedded conductive copper busbar, forming a multi-layered synergistic shielding structure of "outer shielding mesh + middle high-frequency shielding interlayer + inner conductive conduction." Simultaneously, the locking mechanism of the locking blocks and rods ensures a tight and secure closure of the shielding plates. This structure effectively blocks high-frequency electromagnetic signals and stray interference during high-voltage testing, preventing signal distortion and significantly improving the accuracy of insulation performance testing. Furthermore, the sophisticated grounding conduction design and sealing structure prevent high-voltage leakage from the splicing gaps, further reducing safety hazards during high-voltage testing.

[0016] 2. This invention, by setting up a cooling component, uses an air pump in conjunction with a refrigeration box, a lower cooling plate, and an upper cooling pipe to efficiently cool the shielding plate and the detection area. This promptly dissipates the heat generated during the detection of power distribution components and the wire body, preventing high temperatures from causing abnormal performance of the wire insulation layer and a decrease in the accuracy of the detection equipment. At the same time, the scale filter screen inside the filter plate can filter the airflow entering the cooling pipe, preventing scale from clogging the pipe and contaminating the detection components. This allows the cooling water source to circulate and cool, improving the cooling effect.

[0017] 3. This invention adsorbs the messy gas around the wire body through the suction pipe, and introduces it into the air pump through the auxiliary pipe to form a circulation, realizing the integration of cooling, filtration and impurity removal. It effectively maintains the stability of the wind direction and cleanliness of the testing environment, which not only ensures the reliability of the test results, but also reduces the damage to the equipment caused by impurities and external airflow, and further improves the testing stability of the wire body.

[0018] 4. This invention uses a motor to drive a rotating rod to rotate, which in turn drives a pressure component to limit the movement of the wire body. The limiting plate of the pressure component is composed of multiple arc-shaped plates, which can be adapted to wire bodies of different diameters and models. The buffer pad on the surface of the limiting plate can prevent the insulation layer of the wire from being squeezed and damaged during the limiting process. The cooperation of the friction plate, sliding rod and spring can enhance the stability of the limiting, prevent the wire from shaking or shifting, and ensure the stability of the electrical connection between the electrical connection end and the wire body. The vent holes and vent membrane on the limiting plate can realize the air pressure balance adjustment, and the adsorption balls filled with carbon powder inside can dry the surface of the wire body, preventing moisture from affecting the test results. It takes into account adaptability, stability and protection, and can simulate the actual erection state of the wire, solving the defects of poor limiting adaptability and easy damage to the wire in the existing device.

[0019] 5. This invention uses an electric push rod to drive the conductive rod up and down, which can flexibly adjust the contact position and force between the conductive block and the surface of the wire body. The elastic rope between the conductive block and the conductive rod can act as a buffer to ensure that the conductive block and the wire body are in close contact, avoiding poor contact that could lead to interruption or distortion of the detection signal. The conductive rod is electrically connected to the ground wire through a pressure control component, which can flexibly adjust the conductive pressure according to the detection voltage level. This ensures the stability and accuracy of the conductive detection, and also prevents safety hazards caused by abnormal conductive pressure. Multi-point detection improves detection efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a side view of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the pressure control component structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the shielding component structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the suction tube structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the electrical connection terminal structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the limiting plate structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of the limiting plate of the present invention;

[0028] Figure 9 This is a schematic diagram of the conductive block structure of the present invention.

[0029] In the diagram: 1. Control panel; 2. Power distribution components; 3. Warning components; 4. Limiting mechanism; 41. Conductive component; 411. Conductive rod; 412. Electric push rod; 413. Elastic rope; 414. Conductive block; 415. Locking block; 416. Locking rod; 42. Stabilizing component; 421. Pressurizing component; 4211. Vent hole; 4212. Limiting plate; 4213. Adsorption ball; 4214. Breathable membrane; 4215. Spring; 4216. Slide rod; 4217. Friction plate; 4218. Buffer pad; 422. Rotary... 423. Rod; 43. Motor; 5. Pressure control component; 6. Wire body; 7. Electrical connection terminal; 8. Protective mechanism; 9. Shielding component; 10. Electromagnetic shielding mesh; 11. Shielding component; 12. Support frame; 13. Cooling component; 14. Refrigeration box; 15. Air pump; 16. Connecting pipe; 17. Filter plate; 18. Air outlet pipe; 19. Air inlet pipe; 20. Lower cooling plate; 21. Upper cooling pipe; 22. Air pressure component; 33. Auxiliary pipe; 44. Suction pipe; 5. Top block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-9This invention provides a device for simulating and testing the insulation performance of high-voltage direct current transmission lines, including an operating platform 1 and a power line body 5. A power distribution component 2 with a warning component 3 is fixedly installed on the top of the operating platform 1, and the power line body 5 is located on the top of the operating platform 1. The power distribution component 2 electrically connects the power line body 5 to be tested via an electrical connection terminal 6. A protective mechanism 7 is provided on the top of the operating platform 1. The protective mechanism 7 includes a shielding component 71 located on the top of the operating platform 1. The shielding component 71 includes a support frame 713 fixedly installed on one side of the operating platform 1. A shielding component 712 is rotatably installed on the support frame 713 near the top of the power line body 5. The shielding component 712 consists of multiple... The system consists of arc-shaped shielding plates, with conductive sealing strips at the splicing surfaces of adjacent shielding plates. A pressure component 421 for limiting the movement of the wire body 5 is located at the top of the operating table 1. The pressure component 421 includes a limiting plate 4212 installed at the top of the operating table 1. Multiple vent holes 4211 for air pressure balance adjustment are opened on the outer surface of the limiting plate 4212. A breathable membrane 4214 is provided on the inner wall of the limiting plate 4212 near the vent holes 4211. Several adsorption balls 4213 containing dry carbon powder are filled in the internal cavity of the limiting plate 4212. The adsorption balls 4213 are used to dehumidify the microenvironment between the limiting plate 4212 and the wire body 5.

[0032] The power distribution component 2 establishes an electrical connection with the wire body 5 at the top of the operating platform 1 through the electrical connection terminal 6, enabling the detection of insulation performance such as leakage current of the wire body 5. By rotating the shielding component 71, multiple shielding plates are rotated to the top of the wire body 5, providing magnetic protection for the wire body 5. The conductive sealing strips on the splicing surfaces of adjacent shielding plates fill the splicing gaps, preventing electromagnetic and high-voltage leakage from the splicing gaps. The pressurizing component 421 at the top of the operating platform 1 limits the wire body 5 through the limiting plate 4212. The vent 4211 achieves air pressure balance between the limiting plate 4212 and the wire body 5. The breathable membrane 4214 blocks impurities. The vent 4211 of the limiting plate 4212 and the breathable membrane 4214 ensure air pressure balance and prevent impurities from entering. The adsorption ball 4213 dehumidifies in a targeted manner, avoiding the distortion of the detection signal caused by moisture on the surface of the wire body 5, thus providing basic accuracy and safety assurance for insulation detection.

[0033] In some embodiments, a cooling component 72 is provided on one side of the operating table 1. The cooling component 72 includes an air pump 722 fixedly installed on the outside of the operating table 1. A lower cooling plate 727 is fixedly installed on the outside of the shielding plate. An upper cooling pipe 728 is connected to the top of the lower cooling plate 727. The output end of the air pump 722 is connected to one end of the lower cooling plate 727 through an air inlet pipe 726. The input end of the air pump 722 is connected to the upper cooling pipe 728 through an air outlet pipe 725. A refrigeration box 721 is externally connected to the air inlet pipe 726 through a connecting pipe 723.

[0034] The air pump 722 has its output end connected to the lower cooling plate 727 via an air inlet pipe 726, and its input end connected to the upper cooling pipe 728 via an air outlet pipe 725, forming an airflow circulation loop. The air inlet pipe 726 is connected to the cooling box 721 via a connecting pipe 723. The cooling box 721 can cool the airflow entering the pipeline. The cooled airflow is driven by the air pump 722, flows through the lower cooling plate 727 and the upper cooling pipe 728, absorbs the heat from the shielding plate and the detection area, and then flows back to the air pump 722 to achieve continuous cooling and avoid high temperature causing abnormal performance of the wire insulation layer and a decrease in the accuracy of the detection equipment.

[0035] In some embodiments, a filter plate 724 is fixedly installed on the outside of the support frame 713, and the filter plate 724 is connected to the connecting pipe 723. The interior of the filter plate 724 is filled with a filter screen for filtering scale.

[0036] Specifically, before the airflow in the cooling box 721 enters the air inlet pipe 726 through the connecting pipe 723, it must first flow through the filter plate 724 to intercept and filter the scale and impurities in the airflow, preventing scale from entering the lower cooling plate 727 and the upper cooling pipe 728 with the airflow, ensuring smooth airflow for cooling, ensuring stable cooling effect, and preventing impurities from entering the air pump 722, reducing the wear and failure rate of the air pump 722, and extending the service life of the air pump 722 and the cooling pipes.

[0037] In some embodiments, a wind pressure assembly 73 is provided on the surface of the support frame 713. The wind pressure assembly 73 includes a top block 733 fixedly installed on the support frame 713 near the surface of the wire body 5. An air suction pipe 732 for adsorbing the messy gas around the wire body 5 is fixedly installed on the outer surface of the top block 733. The air suction pipe 732 is connected to the input end of the air pump 722 through an auxiliary pipe 731.

[0038] The suction pipe 732 is connected to the input end of the air pump 722 of the cooling component 72 through the auxiliary pipe 731. The negative pressure generated when the air pump 722 is working is used to adsorb the messy gas around the wire body 5 through the suction pipe 732, such as slight volatile gas generated during the detection process and harmful gas carried by dust. The adsorbed gas enters the air pump 722 through the auxiliary pipe 731 and is discharged or treated with the cooling airflow. This solves the problem of messy gas in the detection area affecting the detection environment, maintains the cleanliness of the detection environment, and ensures the reliability of the detection results.

[0039] In some embodiments, a plurality of levers 416 are fixedly installed on the top of the operating table 1, and a block 415 is fixedly installed on the surface of the shielding plate, and the block 415 is engaged with the end of the lever 416. The shielding component 712 is integrally formed with a high-frequency shielding interlayer with a pre-embedded conductive copper busbar. A dedicated grounding terminal is provided at the bottom of the shielding plate, and the terminal is tightly connected to the pre-embedded conductive copper busbar inside the shielding plate. An electromagnetic shielding mesh 711 is pasted on the outer surface of the shielding component 712 with conductive adhesive.

[0040] When multiple arc-shaped shielding plates rotate and close around the support frame 713, completely covering the detection area, the locking blocks 415 on the shielding plates can precisely engage with the end of the locking rod 416 at the top of the operating table 1. This prevents the shielding plates from loosening or shifting during the detection process, effectively ensuring the stability of the shielding component 712 after it closes. It also prevents the shielding plates from loosening due to vibrations from the operation of the air pump 722 and the motor 423 during the detection process, ensuring that the conductive sealing strips on the splicing surfaces are tightly adhered, and eliminating electromagnetic leakage and high-voltage leakage. The integrated shielding component 712 with embedded conductive copper busbars and the electromagnetic shielding mesh 711 bonded with conductive adhesive form a multi-layer shielding structure, which can effectively block high-frequency electromagnetic interference and stray signals during high-voltage detection, avoid signal distortion, improve the accuracy of insulation detection, and simultaneously guide the electromagnetic signals captured by the shielding and possible high-voltage leakage current to the ground. The warning component 3 can issue a warning in case of abnormality, realizing the synergy between shielding protection and safety warning, providing stable protection and accurate detection for the insulation detection of the entire device.

[0041] In some embodiments, a limiting mechanism 4 is provided at the top of the operating table 1. The limiting mechanism 4 includes a stabilizing component 42 provided at the top of the operating table 1. The stabilizing component 42 includes a rotating rod 422 rotatably mounted at the top of the operating table 1. A motor 423 is fixedly mounted at the top of the operating table 1. The output shaft of the motor 423 is fixedly connected to the rotating rod 422. A pressure component 421 for limiting the wire body 5 is provided on the outer surface of the rotating rod 422.

[0042] When the motor 423 starts, it drives the rotating rod 422 to rotate. The rotating rod 422 drives the pressure component 421 on the outer surface to rotate synchronously. The pressure component 421 gradually approaches and adheres to the wire body 5, applying uniform pressure to the wire body 5 to limit and fix the wire body 5, preventing the wire body 5 from shaking or shifting during the detection process. This ensures that the wire body 5 is subjected to balanced force, avoids excessive local force that could damage the wire insulation layer, ensures the stability of the electrical connection between the electrical connection terminal 6 and the wire body 5, avoids poor contact that could lead to distortion of the detection signal, and improves the stability of insulation detection.

[0043] In some embodiments, the pressurizing component 421 includes a plurality of limiting plates 4212 mounted on the outer surface of the rotating rod 422, the wire body 5 is disposed between the plurality of limiting plates 4212, the limiting plates 4212 are composed of a plurality of arc-shaped plates, used to limit the wire body 5 of different models, and a buffer pad 4218 is fixedly installed on the surface of the limiting plate 4212 near the wire body 5.

[0044] The limiting plate 4212 is composed of multiple arc-shaped plates. The opening and closing range of the arc-shaped plates can be flexibly adjusted according to the diameter and model of the wire body 5 to be tested, so as to adapt to different specifications of wire bodies 5. The limiting plate 4212 is fixed with a buffer pad 4218 near the surface of the wire body 5. When the limiting plate 4212 is in contact with the wire body 5, the buffer pad 4218 can buffer the squeezing force of the limiting plate 4212 on the wire body 5, avoid direct contact and wear, and ensure that the test results can truly reflect the insulation performance of the wire.

[0045] In some embodiments, a plurality of friction plates 4217 are fixedly installed on the surface of the limiting plate 4212 near the wire body 5, and a slide rod 4216 is fixedly installed on the surface of the friction plate 4217. The slide rod 4216 slides through the interior of the limiting plate 4212, and a spring 4215 is fixedly installed between the slide rod 4216 and the inner wall of the limiting plate 4212.

[0046] When the limiting plate 4212 is in contact with the wire body 5, the friction plate 4217 is in contact with the surface of the wire body 5, the spring 4215 is in a compressed state, and applies a reverse elastic force to the slide rod 4216, pushing the friction plate 4217 to fit tightly against the surface of the wire body 5, increasing the friction between the friction plate 4217 and the wire body 5, effectively preventing the wire body 5 from sliding or shifting due to airflow disturbance and motor 423 vibration during the detection process, and ensuring the stability of the electrical connection.

[0047] In some embodiments, the adsorption ball 4213 has a hollow mesh spherical structure, and the adsorption ball 4213 is in a free rolling state in the internal cavity of the limiting plate 4212.

[0048] The limiting plate 4212 rotates with the rotating rod 422 or vibrates slightly during the detection process, causing the adsorption ball 4213 to roll in the cavity. This allows the mesh surface of the adsorption ball 4213 to fully contact the humid airflow between the limiting plate 4212 and the wire, ensuring that the adsorption ball 4213 makes contact with the humid airflow in the cavity without any dead angles. This achieves all-round dehumidification of the microenvironment between the limiting plate 4212 and the wire, avoiding local moisture residue that could cause distortion of the detection signal.

[0049] In some embodiments, a conductive component 41 is provided at the top of the operating table 1. The conductive component 41 includes a plurality of electric push rods 412 fixedly installed at the top of the operating table 1. A conductive rod 411 is fixedly installed at the output end of the electric push rod 412. A conductive block 414 is electrically connected to the bottom end of the conductive rod 411. The conductive block 414 can slide on the surface of the wire body 5. An elastic rope 413 is provided between the conductive block 414 and the conductive rod 411. The conductive rod 411 is electrically connected to the ground wire through a pressure control component 43.

[0050] The electric push rod 412 can drive the conductive rod 411 to move up and down, adjusting the contact force and position between the conductive block 414 and the wire body 5. The conductive rod 411 is electrically connected to the ground wire through the pressure control component 43. The pressure control component 43 can adjust the conductive pressure between the conductive rod 411 and the ground wire according to the detection voltage level, realizing the coordination of conductive detection and grounding protection. This ensures the accuracy of detection and prevents safety hazards such as high-voltage leakage and signal distortion caused by abnormal conductive pressure. The elastic rope 413 can buffer the contact pressure, preventing the conductive block 414 from being damaged by excessive pressure, and ensuring that the conductive block 414 and the wire body 5 are in close contact, avoiding interruption or distortion of the detection signal due to poor contact.

[0051] Working Principle: A support frame 713 is fixed on one side of the operating table 1, serving as the mounting base for the shielding component 712. The shielding component 712, composed of multiple arc-shaped shielding plates, is rotatably mounted on the top of the support frame 713. The arc-shaped structure adapts to the shape of the wire body 5 and can be flexibly opened and closed to remove the wire body 5. The shielding component 712 adopts a dual-core shielding structure of "outer layer + inner layer". The outer layer uses conductive adhesive to attach an electromagnetic shielding mesh 711 to the outer surface of the shielding plate, which can initially intercept external low-frequency electromagnetic interference and some stray electromagnetic signals. The inner layer is a high-frequency shielding interlayer with pre-embedded conductive copper busbars integrally formed inside the shielding component 712, which is specifically designed to efficiently block high-frequency electromagnetic signals generated during high-voltage detection, achieving "low-frequency + The multi-layered shielding with full high-frequency coverage minimizes electromagnetic interference to the detection. A dedicated grounding terminal is installed at the bottom of the shielding plate, which is tightly connected to the pre-embedded conductive copper busbar inside the shielding plate to form a complete grounding conduction link. The electromagnetic interference signals intercepted and captured by the outer electromagnetic shielding mesh 711 and the inner high-frequency shielding interlayer, as well as the high-voltage leakage current that may be generated during the detection process, are all conducted to the dedicated grounding terminal through the pre-embedded conductive copper busbar, and then conducted to the ground by the grounding terminal. This achieves rapid zeroing of interference signals and safe discharge of high voltage, eliminating the risk of electromagnetic interference retention and high-voltage leakage.

[0052] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A device for simulating and testing the insulation performance of a high-voltage direct current transmission line, comprising an operating table (1) and a transmission line body (5), characterized in that: The top of the operating table (1) is fixedly equipped with a power distribution component (2) with a warning component (3), and the wire body (5) is located at the top of the operating table (1). The power distribution component (2) electrically connects the wire body (5) to be tested through an electrical connection terminal (6). The top of the operating table (1) is equipped with a protective mechanism (7). The protective mechanism (7) includes a shielding component (71) located at the top of the operating table (1). The shielding component (71) includes a support frame (713) fixedly installed on one side of the operating table (1). The support frame (713) is rotatably equipped with a shielding component (712) near the top of the wire body (5). The shielding component (712) is composed of multiple arc-shaped shielding plates. The adjacent shielding plates are... The splicing surface is provided with a conductive sealing strip. The top of the operating table (1) is provided with a pressure component (421) for limiting the wire body (5). The pressure component (421) includes a limiting plate (4212) installed on the top of the operating table (1). The outer surface of the limiting plate (4212) is provided with a plurality of vent holes (4211) for air pressure balance adjustment. The inner wall of the limiting plate (4212) near the vent holes (4211) is provided with a breathable membrane (4214). The internal cavity of the limiting plate (4212) is filled with a plurality of adsorption balls (4213) containing dry carbon powder. The adsorption balls (4213) are used to dehumidify the microenvironment between the limiting plate (4212) and the wire body (5).

2. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 1, characterized in that: A cooling component (72) is provided on one side of the operating table (1). The cooling component (72) includes an air pump (722) fixedly installed on the outside of the operating table (1). A lower cooling plate (727) is fixedly installed on the outside of the shielding plate. An upper cooling pipe (728) is connected to the top of the lower cooling plate (727). The output end of the air pump (722) is connected to one end of the lower cooling plate (727) through an air inlet pipe (726). The input end of the air pump (722) is connected to the upper cooling pipe (728) through an air outlet pipe (725). A refrigeration box (721) is connected to the air inlet pipe (726) through a connecting pipe (723).

3. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 2, characterized in that: A filter plate (724) is fixedly installed on the outside of the support frame (713), and the filter plate (724) is connected to the connecting pipe (723). The filter plate (724) is filled with a filter screen for filtering scale.

4. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 2, characterized in that: The surface of the support frame (713) is provided with a wind pressure assembly (73). The wind pressure assembly (73) includes a top block (733) fixedly installed on the surface of the support frame (713) near the wire body (5). The outer surface of the top block (733) is fixedly installed with an air suction pipe (732) for adsorbing the messy gas around the wire body (5). The air suction pipe (732) is connected to the input end of the air pump (722) through an auxiliary pipe (731).

5. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 1, characterized in that: Multiple levers (416) are fixedly installed on the top of the operating table (1). A block (415) is fixedly installed on the surface of the shielding plate, and the block (415) is engaged with the end of the lever (416). The shielding component (712) is integrally formed with a high-frequency shielding interlayer with a pre-embedded conductive copper busbar. A dedicated grounding terminal is provided at the bottom of the shielding plate, and the terminal is tightly connected to the pre-embedded conductive copper busbar inside the shielding plate. An electromagnetic shielding mesh (711) is pasted on the outer surface of the shielding component (712) with conductive adhesive.

6. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 1, characterized in that: The top of the operating table (1) is provided with a limiting mechanism (4). The limiting mechanism (4) includes a stabilizing component (42) provided at the top of the operating table (1). The stabilizing component (42) includes a rotating rod (422) rotatably installed at the top of the operating table (1). A motor (423) is fixedly installed at the top of the operating table (1). The output shaft of the motor (423) is fixedly connected to the rotating rod (422), and a pressure component (421) is provided on the outer surface of the rotating rod (422).

7. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 6, characterized in that: The wire body (5) is arranged between multiple limiting plates (4212). The limiting plates (4212) are composed of multiple arc-shaped plates and are used to limit the wire bodies (5) of different models. A buffer pad (4218) is fixedly installed on the surface of the limiting plates (4212) near the wire body (5).

8. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 7, characterized in that: Multiple friction plates (4217) are fixedly installed on the surface of the limiting plate (4212) near the wire body (5). A sliding rod (4216) is fixedly installed on the surface of the friction plate (4217), and the sliding rod (4216) slides through the interior of the limiting plate (4212). A spring (4215) is fixedly installed between the sliding rod (4216) and the inner wall of the limiting plate (4212).

9. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 1, characterized in that: The adsorption ball (4213) has a hollow mesh spherical structure, and the adsorption ball (4213) is in a free rolling state in the internal cavity of the limiting plate (4212).

10. The insulation performance simulation and testing device for a high-voltage direct current transmission line according to claim 1, characterized in that: The top of the operating table (1) is provided with a conductive component (41). The conductive component (41) includes a plurality of electric push rods (412) fixedly installed on the top of the operating table (1). The output end of the electric push rod (412) is fixedly installed with a conductive rod (411). The bottom end of the conductive rod (411) is electrically connected to a conductive block (414), and the conductive block (414) slides on the surface of the wire body (5). An elastic rope (413) is provided between the conductive block (414) and the conductive rod (411). The conductive rod (411) is electrically connected to the ground wire through a pressure control component (43).

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