A multifunctional ultra-high voltage insulation performance test platform device

Abstract

The present invention discloses a multifunctional ultra-high voltage insulation performance test platform device, which is composed of a high-voltage incoming line unit, a vacuum test unit, an auxiliary exhaust unit, and an inspection platform. The high-voltage incoming line unit is composed of a high-voltage power supply, a power supply tank, a pressure gauge, a shielding ring, a conductor support frame, a bellows, a vacuum epoxy fiberglass cylinder, a conductive plate, a high-voltage conductor, an inner shielding cover, a pressure relief device, SF6 gas, etc. The vacuum test unit is composed of a vacuum tank, a pressure-resistant contact, an insulating platform, a KF25 connector, a CF35 interface, a vacuum pump interface, an inspection door, an observation window, a secondary wiring board, etc. The auxiliary exhaust unit can ensure the vacuum degree of the vacuum chamber. The climbing platform adopts an aluminum alloy profile structure to ensure strength while ensuring the overall aesthetics.

Description

Technical Field

[0001] The present invention belongs exclusively to the technical field of high-voltage DC insulation, and particularly focuses on a multi-functional ultra-high voltage insulation performance test platform device. This device aims to solve key problems such as diverse test requirements, high safety requirements, and the balance between test efficiency and accuracy in current high-voltage DC insulation performance evaluation, and provides a set of efficient, accurate, and adaptable test solutions for industries such as power transmission, accelerator technology, and semiconductor manufacturing that require high-voltage insulation guarantee. Background Art

[0002] In recent years, due to the continuous increase in the demand for power transmission voltage in high-voltage transmission systems, the power bus structure has gradually shifted to the use of metal-enclosed gas insulation technology (GIS), which significantly reduces the floor area and exhibits excellent anti-external electromagnetic environment interference ability and advantages in terms of easy operation and maintenance management. Currently, as the choice of key insulating medium, sulfur hexafluoride (SF6) and dry air are widely used due to their excellent insulation characteristics, and the research on the insulation performance of internal insulating components has entered a mature stage.

[0003] However, in specific application scenarios, such as those requiring extremely high purity or avoiding the release of specific chemical substances, vacuum insulation technology becomes a necessary choice. Although there is a certain amount of literature and practical experience in the performance evaluation of insulating components in vacuum media under low-voltage conditions, under high-voltage conditions, relevant performance data is still scarce and there is a lack of direct reference standards. Therefore, in high-voltage vacuum insulation design, it often relies on estimation and simulation methods, which lead to two major challenges in the design process: on the one hand, insufficient design margin may cause discharge breakdown during the power-on process, seriously threatening system safety; on the other hand, excessive increase in design margin to ensure safety will result in a significant increase in equipment volume and unnecessary waste of raw material resources. Therefore, exploring precise design theories and methods applicable to high-voltage vacuum insulation has become a technical problem that urgently needs to be solved. Summary of the Invention

[0004] The core objective of the present invention is to design and implement a high-performance ultra-high voltage insulation performance test platform device with multi-functionality, aiming to overcome the limitations of the existing technology. This device aims to comprehensively evaluate the ultra-high voltage insulation withstand characteristics of various materials in a vacuum environment, accurately measure and record key parameters, and then, based on this, scientifically formulate vacuum insulation parameter standards for high-voltage components to ensure full satisfaction of insulation performance and effectively optimize the overall size of the equipment to achieve miniaturization of the volume.

[0005] In addition, the test platform device also has a flexible gas injection function, which can accommodate and test the insulation performance of various gases under diverse conditions, including but not limited to the influence of variables such as temperature and pressure on the insulation performance, thereby providing solid data support and technical guidance for the selection and optimization of gas insulation materials in different application scenarios.

[0006] To achieve the above object, a multifunctional ultra-high voltage insulation performance test platform device of the present invention comprises a high-voltage incoming line unit, a vacuum test unit, an auxiliary air extraction unit, and a detection platform; wherein,

[0007] The high-voltage incoming line unit is used for placing a high-voltage power supply and is filled with SF6 gas inside.

[0008] The vacuum test unit is used for testing the insulation characteristics of insulating parts and is evacuated inside.

[0009] The auxiliary air extraction unit is used for extracting air from the vacuum test unit to ensure the internal vacuum degree.

[0010] The maintenance platform is for the convenience of personnel operation during maintenance.

[0011] The high-voltage incoming line unit is respectively installed on both sides of the vacuum test unit; the auxiliary air unit is connected to the vacuum test unit, and the maintenance platform is placed at the maintenance opening of the vacuum test unit.

[0012] The remarkable technical advantages and beneficial effects demonstrated by the present invention are as follows:

[0013] 1. Wide adaptability test ability: The present invention designs a multifunctional test platform that can flexibly meet the test requirements of insulating parts of different sizes under a wide range of conditions, including but not limited to ultra-high voltage DC withstand voltage tests under different vacuum environments and states filled with gases of different pressures and types. This high degree of configurability ensures the comprehensiveness and accuracy of the evaluation of the performance of insulating materials and meets the test requirements in diverse application scenarios.

[0014] 2. Insulation performance test of large-area high-energy positive and negative ion source: Further, the platform can also perform insulation performance tests on large-area, high-energy positive and negative ion source acceleration electrodes under different vacuum conditions, filling the gap in the insulation evaluation of such complex and high-performance electrodes by traditional test means, and providing strong support for insulation design in fields such as advanced accelerator systems and ion beam technology.

[0015] 3. Space optimization and reduction of floor area: Through elaborate structural design and layout optimization, the test platform of the present invention realizes a significant reduction in the overall volume, effectively reduces the floor area, improves the space utilization efficiency of the test laboratory, and is also conducive to the transportation and deployment of test equipment.

[0016] 4. Enhancement of operational safety: Considering electrical safety during the testing process, all the tank shells in this invention are designed to be at ground potential. This design fundamentally eliminates the risk of electric shock to operators, ensures the safe progress of the testing process, reduces the likelihood of accidents, and improves the reliability and maintainability of the entire testing system. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions of this invention, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of this invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is the front structural schematic diagram of this invention;

[0019] Figure 2 is the side structural schematic diagram of this invention;

[0020] Figure 3 is the internal sectional view of this invention;

[0021] Figure 4 is the connection diagram of the vacuum fiberglass reinforced plastic.

[0022] In the figures: 1 - High-voltage incoming line unit, 2 - Vacuum testing unit, 3 - Auxiliary air extraction unit, 4 - Maintenance platform, 5 - High-voltage power supply, 6 - Power supply tank, 7 - Pressure gauge, 8 - Shielding ring, 9 - Conductor support frame, 10 - Bellows, 11 - Vacuum epoxy fiberglass cylinder, 12 - Conductive plate, 13 - High-voltage conductor, 14 - Inner shielding cover, 15 - Pressure relief device, 16 - SF6 gas, 17 - Vacuum tank, 18 - Voltage withstand contact, 19 - Insulating platform, 20 - KF25 joint, 21 - CF35 interface, 22 - Vacuum pump interface, 23 - Maintenance door, 24 - Observation window, 25 - Secondary wiring board. Detailed Embodiments

[0023] To make the objectives, features, and advantages of this invention more obvious and understandable, the technical solutions protected by this invention will be clearly and completely described below by using specific embodiments and the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and all other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in this invention belong to the scope of protection of this invention.

[0024] This invention provides a multifunctional ultra-high voltage insulation performance testing platform device. Refer to Figure 1 、 Figure 2, the device is composed of a high-voltage incoming line unit 1, a vacuum testing unit 2, an auxiliary air extraction unit 3, and a maintenance platform 4. Among them, the high-voltage incoming line unit 1 is used to place the high-voltage power supply 5, and is filled with SF6 gas 16 inside; the vacuum testing unit 2 is used to test the insulation characteristics of the insulating parts and is evacuated inside; the auxiliary air extraction unit 3 is used to extract air from the vacuum testing unit 1 to ensure the vacuum degree inside; the maintenance platform 4 is for the convenience of personnel operation during maintenance; two sets of high-voltage incoming line units 1 are respectively installed on both sides of the vacuum testing unit 2 and are butt-connected by flanges. The auxiliary air unit 3 is connected to the vacuum testing unit 2 through a stainless steel pipe, and the maintenance platform 4 is placed at the maintenance opening of the vacuum testing unit 2.

[0025] As Figure 3 , Figure 4 shown, the high-voltage incoming line unit 1 is composed of a high-voltage power supply 5, a power supply tank 6, a pressure gauge 7, a shielding ring 8, a conductor support frame 9, a bellows 10, a vacuum epoxy glass fiber reinforced plastic cylinder 11, a conductive plate 12, a high-voltage conductor 13, an inner shielding cover 14, a pressure relief device 15, and SF6 gas 16. The high-voltage incoming line unit 1 is filled with SF6 gas 16 inside. The high-voltage power supply 5 is fixed to the power supply tank 6. The high-voltage outgoing line of the high-voltage power supply 5 is connected to the inside of the vacuum testing unit 2 through the high-voltage conductor 13 and is led out by the conductive plate 12. Both ends of the high-voltage conductor 13 are supported by the conductor support frame 9 and the vacuum epoxy glass fiber reinforced plastic cylinder 11 respectively. The pressure relief device 15 is installed on the extraction flange of the power supply tank 6. The pressure gauge 7 monitors the gas pressure of the power supply tank 6 in real time. The pressure relief device 15 is used for pressure relief to ensure personal safety.

[0026] In the present invention, the shielding ring 8 is installed on the top of the high-voltage power supply 5 and is used to fix the other end of the high-voltage conductor 13, playing a role in shielding sharp corners.

[0027] In the present invention, the bellows 10 is installed between the high-voltage incoming line unit 1 and the vacuum testing unit 2 and is used to absorb installation errors and ensure overall sealing;

[0028] In the present invention, the inner shielding cover 14 is fixed at the small flange position of the vacuum epoxy glass fiber reinforced plastic cylinder 11 and is used to improve the electric field distribution of the high-voltage conductor.

[0029] In the present invention, the vacuum testing unit 2 is composed of a vacuum tank 17, a withstand voltage contact 18, an insulating platform 19, a KF25 joint 20, a CF35 interface 21, a vacuum pump interface 22, a maintenance door 23, an observation window 24, and a secondary wiring board 25. The KF25 joint 20, the CF35 interface 21, the vacuum pump interface 22, the maintenance door 23, the observation window 24, and the secondary wiring board 25 are respectively fixed to the vacuum tank 17. The insulating platform 19 is fixed to the bottom of the vacuum tank 17, and the withstand voltage contact 18 is fixed to the conductive plate 12.

[0030] In the present invention, the KF25 connector 20 and the CF35 interface 21 are vacuum output interfaces, mainly used for connecting a molecular pump.

[0031] In the present invention, the vacuum pump interface 22 is mainly used for connecting a molecular pump unit.

[0032] In the present invention, the maintenance door 23 is mainly used for the inlet and outlet of experimental equipment and the inlet and outlet of personnel, facilitating the entry and exit of equipment and the maintenance of personnel.

[0033] In the present invention, the auxiliary pumping unit 3 can ensure the vacuum degree of the vacuum chamber.

[0034] In the present invention, the maintenance platform 4 adopts an aluminum alloy profile structure, ensuring strength while guaranteeing the overall aesthetics.

[0035] In the present invention, the high-voltage power supply 5 adopts a resistive voltage divider and is designed with an annular shielding structure to ensure uniform electric field.

[0036] In the present invention, the power supply tank body 6 is made by welding steel plates (or aluminum alloy plates) to ensure sufficient tensile strength.

[0037] In the present invention, the pressure gauge 7 is designed with a remote transmission function, which can monitor the gas pressure of the power supply tank body in real time to ensure the internal insulation performance.

[0038] As Figure 4 shown, the vacuum epoxy fiberglass cylinder 11 adopts a high-strength glass fiber winding process to ensure the overall strength and relies on epoxy resin insulation to ensure the insulation performance. The overall structure is designed as a cone, with one end connected to the high potential and the other end connected to the ground potential. One end of the vacuum epoxy fiberglass cylinder 11 is fixed on the vacuum tank body 17, and the other end is connected to the conductive plate 12. The high-voltage conductor 13 passes through the vacuum epoxy fiberglass cylinder 11 and is fixed to the conductive plate 12.

[0039] In the present invention, the pressure relief device 15 is made of stainless steel and is designed with an upper pressure limit as a whole to ensure personal safety.

[0040] In the present invention, the SF6 gas 16 has high insulation performance and is a good insulating medium.

[0041] In the present invention, the vacuum tank body 17 is made of steel plate material to ensure the mechanical strength under negative pressure.

[0042] In the present invention, the voltage-resistant contact 18 is designed as an adjustable structure, and the corresponding insulation voltage-resistant distance requirements are adjusted according to different voltage levels.

[0043] In the present invention, the insulating platform 19 is composed of polytetrafluoroethylene material to ensure the insulation performance in vacuum.

[0044] In the present invention, the secondary wiring board 25 is hermetically sealed with ceramics and is integrally designed in the form of an aviation plug for live measurement inside the vacuum chamber.

[0045] In the present invention, the observation window 24 is made of tempered glass to ensure mechanical strength while better observing whether there is corona and spark discharge inside.

[0046] The specific operation process of the present invention is as follows: Fix the test piece to the insulating platform 19, connect the two ends of the test piece to the withstand voltage contacts 18 on both sides respectively, close the maintenance door 23, and the auxiliary pumping unit 3 evacuates to the test vacuum degree. Set the positive and negative high voltage of the high voltage power supply 5 in the high voltage inlet units 1 on both sides, start the voltage, and conduct the withstand voltage test.

[0047] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit and scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles, novel features, and creative features disclosed herein.

Claims

1. A multifunctional ultra-high voltage insulation performance test platform device, characterized in that, The device consists of a high-voltage incoming line unit, a vacuum testing unit, an auxiliary air extraction unit, and a maintenance platform; among them, The high-voltage incoming line unit is used to place the high-voltage power supply and is filled with SF6 gas inside. The vacuum testing unit is used to test the insulation characteristics of the insulating parts and is evacuated inside. The auxiliary air extraction unit is used for air extraction of the vacuum testing unit to ensure the vacuum degree inside. The maintenance platform is for the convenience of personnel operation during maintenance. The high-voltage incoming line unit is installed on both sides of the vacuum testing unit respectively; the auxiliary air extraction unit is connected to the vacuum testing unit, and the maintenance platform is placed at the maintenance opening of the vacuum testing unit. The high-voltage incoming line unit includes a high-voltage power supply, a power supply tank, a shielding ring, a conductor support frame, a bellows, a vacuum epoxy glass fiber reinforced plastic cylinder, a conductive plate, a high-voltage conductor, an inner shielding cover, a pressure relief device, and SF6 gas; among them, the high-voltage incoming line unit is filled with SF6 gas inside, the high-voltage power supply is fixed to the power supply tank, the high-voltage outgoing line of the high-voltage power supply is connected to the inside of the vacuum testing unit through the high-voltage conductor and led out by the conductive plate, both ends of the high-voltage conductor are supported by the conductor support frame and the vacuum epoxy glass fiber reinforced plastic cylinder respectively, and the pressure relief device is installed on the plug flange of the power supply tank; the shielding ring is installed on the top of the high-voltage power supply to fix the other end of the high-voltage conductor; the bellows is installed between the high-voltage incoming line unit and the vacuum testing unit; the inner shielding cover is fixed at the position of the small flange of the vacuum epoxy glass fiber reinforced plastic cylinder. The high-voltage power supply adopts a hierarchical voltage multiplier circuit structure design and is provided with an annular shielding structure.

2. The multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The vacuum testing unit includes a vacuum tank, a withstand voltage contact, an insulating platform, a KF25 joint, a CF35 interface, a vacuum pump interface, a maintenance door, an observation window, and a secondary wiring board; among them, the KF25 joint, the CF35 interface, the vacuum pump interface, the maintenance door, the observation window, and the secondary wiring board are respectively fixed to the vacuum tank, the insulating platform is fixed to the bottom of the vacuum tank, and the withstand voltage contact is fixed to the conductive plate; the KF25 joint and the CF35 interface are vacuum output interfaces for connecting a molecular pump; the vacuum pump interface is for connecting a molecular pump unit; the maintenance door is for the import and export of experimental equipment and the import and export of personnel.

3. A multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The auxiliary air extraction unit is used for evacuating the vacuum tank and consists of a mechanical pump, a roots pump, and a molecular pump.

4. A multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The maintenance platform adopts an aluminum alloy profile structure.

5. A multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The power supply tank is made by welding steel plates or aluminum alloy plates.

6. The multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The high-voltage incoming line unit further includes a pressure gauge, and the pressure gauge is used to monitor the gas pressure of the power supply tank in real time.

7. A multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The vacuum epoxy glass fiber reinforced plastic cylinder is insulated with epoxy resin and is processed by a glass fiber winding process.

8. A multifunctional ultra-high voltage insulation performance test platform device according to claim 1, characterized in that, The pressure relief device is made of stainless steel material.

9. The multifunctional ultra-high voltage insulation performance test platform device according to claim 2, characterized in that, The vacuum tank is made of steel plate material.

10. The multifunctional ultra-high voltage insulation performance test platform device according to claim 2, characterized in that, The withstand voltage contact is of an adjustable structure, and according to different voltage levels, the corresponding insulation withstand voltage distance requirements are adjusted.

11. A multifunctional ultra-high voltage insulation performance test platform device according to claim 2, characterized in that, The insulating platform is made of polytetrafluoroethylene material.

12. The multifunctional ultra-high voltage insulation performance test platform device according to claim 2, characterized in that, The secondary wiring board is hermetically insulated with ceramics and adopts the form of an aviation plug for live measurement inside the vacuum chamber.

13. A multifunctional ultra-high voltage insulation performance test platform device according to claim 2, characterized in that, The observation window is made of toughened glass material.

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