High-pressure gas insulation experiment device and method

Abstract

The invention relates to an experiment device and method, in particular to a high-pressure gas insulation experiment device and method, and solves the technical problem that an existing insulation device is difficult to meet the insulation requirement in a high-pressure experiment. The device comprises an insulating body, a front cover plate, a rear cover plate, an inner guide rail, an outer guide rail, an operation platform in sliding connection with the inner guide rail and / or the outer guide rail, a barometer and detection equipment, the operation platform is used for setting a discharge loop; a capacitor in the discharging loop is connected with the charging flange for charging the capacitor; the gas switch is connected with the charging flange and is used for controlling the gas switch to be conducted in the discharging cavity for a discharging experiment; a water path port of the gas path and water path flange is used for filling a circulating solution into the water resistor and receiving energy released by the water resistor when the gas switch is switched on and discharges; the gas path port is used for inflating or deflating the discharge cavity; the voltage and current sensor is connected with the detection equipment through the measuring flange and is used for observing and recording the waveform of the discharge loop in real time.

Description

Technical Field

[0001] The invention relates to an experimental device and a method, and in particular to a high-voltage gas insulation experimental device and a method. Background Art

[0002] The discharge test voltage level in pulse power technology is usually tens to hundreds of kilovolts, and insulation is one of the key issues to be considered. The insulation capacity of air is relatively weak, and the experimental device cannot be miniaturized and compacted under air insulation conditions. Therefore, in order to achieve miniaturization, save costs, and reduce experimental safety risks, it is necessary to improve the insulation capacity of the experimental environment. Among them, the more commonly used insulation environments are oil insulation and gas insulation. Their insulation capacity is usually several times that of air, which provides favorable conditions for the compact design of systems and structures. However, the oil insulation environment usually has problems such as difficult maintenance, inconvenient operation, and carbon deposition pollution. The experimental platform under the gas insulation environment can better avoid the above problems.

[0003] In order to meet the needs of high-voltage experiments, a simple insulating environment is not enough. It also requires supporting auxiliary systems such as high and low voltage charging, water source for cooling water resistors, gas switch ventilation system, and electrical signal measurement system. At the same time, it is also necessary to consider the insulation body inflation and vacuum system to meet the ventilation and high pressure requirements in the cavity. However, the existing insulation devices are difficult to achieve the insulation requirements in the above-mentioned high-voltage experiments. Therefore, it is urgent to design an experimental platform that integrates multiple functions. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that the existing insulation device is difficult to achieve the insulation requirements in high-voltage experiments, and to provide a high-voltage gas insulation test device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A high-voltage gas insulation test device is used for a discharge test of a discharge circuit, and its special features are: it comprises an insulation body, a front cover plate sealed and connected to the front end of the insulation body, a rear cover plate sealed and connected to the rear end of the insulation body, an inner guide rail fixedly arranged on the inner wall of the insulation body, an outer guide rail arranged outside the insulation body and docking with the inner guide rail, an operating platform slidably connected to the inner guide rail and / or the outer guide rail, as well as a barometer and a detection device; the operating platform is used to set the discharge circuit;

[0007] A closed discharge cavity is formed between the insulating body and the front cover plate and the rear cover plate;

[0008] The barometer is mounted on the insulating body and is used to monitor the gas pressure of the discharge cavity in real time;

[0009] A charging flange, gas and water channel flanges and a measuring flange are sealed on the outer wall of the rear cover plate, and a charging insulating rod is provided at a position corresponding to the charging flange on the inner wall, and the charging insulating rod is sealed and connected to the inner wall;

[0010] The capacitor in the discharge circuit is connected to the inner end of the charging flange through a wire passing through the charging insulating rod, and the outer end of the charging flange is connected to an external high-voltage power supply for charging the capacitor; the gas switch in the discharge circuit is connected to the inner end of the charging flange through a wire passing through the charging insulating rod, and the outer end of the charging flange is connected to an external high-voltage pulse power supply for controlling the gas switch to be turned on in the discharge cavity for a discharge experiment; the water resistor in the discharge circuit is connected to an external water source through the water channel ports of the gas and water channel flanges, and is used to fill the water resistor with circulating solution to receive the energy released when the gas switch is turned on and discharged; the gas channel ports of the gas and water channel flanges are connected to external equipment for inflating or exhausting the discharge cavity; the voltage and current sensors in the discharge circuit are connected to the detection equipment through the measuring flange, and are used to observe and record the waveform of the discharge circuit in real time.

[0011] Furthermore, the charging flange includes a positive high-voltage charging flange, a negative high-voltage charging flange and a triggering high-voltage pulse flange; the positive and negative electrodes of the capacitor are respectively connected to the inner ends of the positive high-voltage charging flange and the negative high-voltage charging flange through wires passing through the charging insulating rod, and the outer ends of the positive high-voltage charging flange and the negative high-voltage charging flange are respectively connected to the positive electrode of the external high-voltage power supply; the gas switch is connected to the inner end of the triggering high-voltage pulse flange through a wire passing through the charging insulating rod, and the outer end of the triggering high-voltage pulse flange is connected to the external high-voltage pulse power supply.

[0012] Furthermore, it also includes observation windows respectively arranged on the front cover plate and on the opposite side walls of the insulating body, and the observation windows are used to take pictures and record the discharge process; the observation window includes an insulating welding seat, a pressure ring and a glass window; through holes adapted to one end of the insulating welding seat are respectively arranged on the front cover plate and on the opposite side walls of the insulating body; one end of the insulating welding seat is connected to the front cover plate or the insulating body, the glass window is arranged at the other end of the insulating welding seat, and the pressure ring is used to tightly fix the glass window to the other end of the insulating welding seat.

[0013] Furthermore, it also includes multiple connecting shafts and multiple rollers adapted to the inner guide rail and the outer guide rail; mounting holes corresponding to the inner guide rail and the outer guide rail are arranged on both sides of the operating platform along the sliding direction; and the rollers are fixedly connected to the mounting holes through the connecting shafts.

[0014] Furthermore, it also includes a cushion block and a support frame; the inner guide rail is fixedly connected to the inner wall of the insulating body through the cushion block; the support frame is connected to the outer wall of the insulating body; one side of the front cover is hinged to the insulating body; a spare flange is arranged on the rear cover; the circulating solution is a saline solution; and the detection equipment adopts an oscilloscope.

[0015] At the same time, the present invention also provides a high-voltage gas insulation test method, which is special in that it includes the following steps:

[0016] S1. Prepare the above-mentioned high-voltage gas insulation experimental device;

[0017] S2. Inflate the gas switch to a first preset pressure, fill the water resistor with a circulating solution, slide the operating platform on the inner rail and the outer rail, move the discharge circuit into the discharge cavity, and seal the front cover and the rear cover with the insulating body;

[0018] S3, evacuate the discharge chamber to a temperature less than or equal to 10 -2 Pa, and then the discharge cavity is filled with gas to a second preset pressure;

[0019] S4. Charge the capacitor. When the capacitor reaches the preset voltage, control the high-voltage pulse power supply to generate a trigger signal, so that the gas switch is turned on to release energy to the circulating solution of the water resistor. At the same time, use the detection equipment to observe and record the waveform of the discharge circuit to complete a discharge experiment.

[0020] Furthermore, S5 is also included:

[0021] The gas in the discharge chamber is recovered into the gas cylinder to make the discharge chamber a vacuum state, and then filled with air to normal pressure to ensure that the front cover can be opened smoothly, thus ending the experiment.

[0022] Furthermore, step S1 is specifically as follows:

[0023] The positive and negative electrodes of the capacitor are connected to the inner ends of the positive high-voltage charging flange and the negative high-voltage charging flange through wires passing through the charging insulating rod, and the outer ends of the positive high-voltage charging flange and the negative high-voltage charging flange are connected to the positive electrode of the external high-voltage power supply respectively; the gas switch is connected to the inner end of the triggering high-voltage pulse flange through a wire passing through the charging insulating rod, and the outer end of the triggering high-voltage pulse flange is connected to the external high-voltage pulse power supply; the voltage and current sensor is connected to the detection equipment through the measuring flange; the water resistor is connected to the external water source through the gas and water flanges, and the rear cover is connected to the external equipment through the gas and water flanges.

[0024] Further, in step S2, the first preset air pressure is 0.2 MPa to 0.8 MPa.

[0025] Further, in step S3, the gas is SF 6 Or compressed air; the second preset air pressure is 0.2Mpa~0.5Mpa; in step S4, the preset voltage is 50kV-100kV.

[0026] Beneficial effects of the present invention:

[0027] 1] A high-voltage gas insulation experimental device of the present invention can fill a discharge cavity formed by an insulating body, a front cover plate, and a rear cover plate with different types of gases to a high voltage, so that the insulation performance of the environment in the discharge cavity is 2-3 times higher than that of air, and a miniaturized and compact design of a high-voltage discharge device can be achieved.

[0028] 2] A high-voltage gas insulation experimental device of the present invention has a charging flange, gas and water flanges and a measuring flange sealed on the outer wall of the rear cover plate. It can be installed with external equipment with different functions according to different needs in the experimental process, and integrates the functions of water circulation, gas circulation, electrical signal measurement, high-voltage charging, low-voltage charging, observation and photography, making the operation more convenient and quick.

[0029] 3] A high-voltage gas insulation experimental device of the present invention has an insulating body that can maintain a high gas pressure and has observation or photographing conditions. Before the experiment, the operating platform can be slid out of the discharge cavity through an external guide rail to ensure that the operator can smoothly operate the experiment.

[0030] 4] A high-voltage gas insulation experimental device of the present invention can move the operating platform out of the discharge cavity through the outer guide rail, and can also use the support frame to adjust the height of the insulation body so as to install and disassemble the specific structure of the discharge experiment.

[0031] 5] A high-voltage gas insulation experimental device of the present invention can observe and take pictures of the closed environment in the discharge cavity by using an observation window, and can record the discharge process of the gas switch and the entire process of conducting spark arc by using a detection device.

[0032] 6] A high-voltage gas-insulated experimental device of the present invention can realize the functions of vacuuming, exhausting and charging high voltage to the discharge cavity through the gas path and water path flanges, thereby improving the maintenance and operation efficiency of the experimental environment.

[0033] 7] A high-voltage gas insulation test method of the present invention can keep the state in the discharge chamber unchanged after completing one discharge test, and conduct multiple tests to reduce the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an embodiment of a high-voltage gas insulation experimental device of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a rear cover plate in an embodiment of a high-voltage gas insulation experimental device of the present invention;

[0036] Figure 3 A cross-sectional view of an embodiment of a high-voltage gas insulation experimental device of the present invention;

[0037] Figure 4A schematic structural diagram of a discharge circuit outside the insulation body in an embodiment of a high-voltage gas insulation experimental device of the present invention.

[0038] Description of reference numerals:

[0039] 1-insulating body, 2-front cover, 3-observation window, 4-flatbed car, 51-inner guide rail, 52-outer guide rail, 6-support frame, 7-gas recovery device, 8-rear cover, 9-hinge, 10-charging flange, 11-gas and water flanges, 12-measuring flange, 13-spare flange, 14-charging insulating rod, 15-operating platform, 16-pad, 17-elliptical head, 18-capacitor, 19-water resistor, 20-gas switch, 21-support pad. DETAILED DESCRIPTION

[0040] like Figure 1 As shown, a high-voltage gas insulation experimental device is used for a discharge experiment of a discharge circuit, comprising an insulating body 1, a front cover plate 2 sealed and connected to the front end of the insulating body 1, a rear cover plate 8 sealed and connected to the rear end of the insulating body 1, an inner guide rail 51 fixedly arranged on the inner wall of the insulating body 1, an outer guide rail 52 arranged outside the insulating body 1 and docking with the inner guide rail 51, an operating platform 15 slidably connected to the inner guide rail 51 and the outer guide rail 52, as well as a barometer, a detection device, an observation window 3, a plurality of connecting shafts, a plurality of rollers, a cushion block 16, and a support frame 6; the operating platform 15 is used to set a discharge circuit through a support cushion block 21; a closed discharge cavity is formed between the insulating body 1 and the front cover plate 2 and the rear cover plate 8; the barometer is arranged on the insulating body 1, and is used to monitor the gas pressure of the discharge cavity in real time; as shown Figure 4 As shown, the discharge circuit includes two capacitors 18, two water resistors 19, a gas switch 20 and a voltage and current sensor; one end of the two capacitors 18 is respectively connected to the gas switch 20 and the external charging connector, and the other end is respectively connected to the two water resistors 19, forming two parallel circuits, and the gas switch 20 is the common part of the circuit; the upper end of the gas switch 20 is connected to the trigger connector, and the lower end is connected to the gas pipe.

[0041] like Figure 2 As shown, a charging flange 10, an air and water flange 11 and a measuring flange 12 are sealed on the outer wall of the rear cover plate 8, and a charging insulating rod 14 is arranged at a position corresponding to the charging flange 10 on the inner wall, and the charging insulating rod 14 is sealed and connected to the inner wall.

[0042] The capacitor 18 is connected to the inner end of the charging flange 10 through a wire passing through the charging insulating rod 14, and the outer end of the charging flange 10 is connected to an external high-voltage power supply for charging the capacitor 18; the gas switch 20 is connected to the inner end of the charging flange 10 through a wire passing through the charging insulating rod 14, and the outer end of the charging flange 10 is connected to an external high-voltage pulse power supply for controlling the gas switch 20 to be turned on in the discharge cavity for a discharge experiment; the water resistor 19 is connected to an external water source through the water channel port of the gas channel and water channel flange 11, and is used to fill the water resistor 19 with a circulating solution to receive the energy released when the gas switch 20 is turned on and discharged; the rear cover plate 8 is connected to an external device through the gas channel port of the gas channel and water channel flange 11, and is used to inflate or exhaust the discharge cavity; the voltage and current sensor is connected to the detection equipment through the measuring flange 12, and is used to observe and record the waveform of the discharge circuit in real time. The charging flange 10 includes a positive high-voltage charging flange, a negative high-voltage charging flange and a triggering high-voltage pulse flange; the positive and negative electrodes of the capacitor 18 are respectively connected to the positive high-voltage charging flange, the negative high-voltage charging flange and the inner ends of the charging insulating rod 14 through wires, and the outer ends of the positive high-voltage charging flange and the negative high-voltage charging flange are respectively connected to the positive electrode of an external high-voltage power supply; the gas switch 20 is connected to the inner end of the triggering high-voltage pulse flange through a wire passing through the charging insulating rod 14, and the outer end of the triggering high-voltage pulse flange is connected to the external high-voltage pulse power supply.

[0043] In this embodiment, the insulating body 1 is a cylindrical structure that can withstand high air pressure. The material and wall thickness are designed according to the pressure requirements. The front cover plate 2 is an elliptical head 17; the insulating body 1 is sealed with the front cover plate 2 and the rear cover plate 8 to ensure the airtightness of the discharge cavity; during assembly and maintenance, the lifting ring can be connected to the insulating body 1 for lifting. The front cover plate 2 is a standard elliptical head, and the front cover plate 2 is hinged to the insulating body 1 through a hinge 9, so that the front cover plate 2 has an opening and closing function. A spare flange 13 is provided on the rear cover plate 8, which can be appropriately replaced according to actual use requirements.

[0044] Preferably, the observation window 3 is respectively arranged on the front cover plate 2 and the opposite side wall of the insulating body 1, and is used to take pictures and record the discharge process; the observation window 3 includes an insulating welding seat, a pressure ring and a glass window; through holes adapted to the small end of the insulating welding seat are respectively arranged on the end cover and the opposite side wall of the insulating body 1; one end of the insulating welding seat is connected to the front cover plate 2 or the insulating body 1, the pressure ring is connected to the other end of the insulating welding seat, and the glass window is arranged at the other end of the insulating welding seat, and the pressure ring is used to press and fix the glass window on the other end of the insulating welding seat. There are three observation windows 3, which are respectively located at the center position of the front cover plate 2 (for easy observation of the cavity environment) and the center positions on both sides of the insulating body 1 (for easy photography and recording of the switch discharge process). The discharge experiment process in the discharge cavity can be observed through the three observation windows 3.

[0045] like Figure 3 , Figure 4As shown, the roller is matched with the inner guide rail 51 and the outer guide rail 52, and the operating platform 15 has mounting holes corresponding to the inner guide rail 51 and the outer guide rail 52 on both sides along the sliding direction; the roller is fixedly connected to the mounting hole through a connecting shaft, and the operating platform 15 slides along the outer guide rail 52, and the discharge circuit can be transported to the flatbed car 4 outside the discharge cavity for installation, which is convenient for operation; the operating platform 15 slides along the inner guide rail 51, and the discharge circuit can be transported to the inside of the discharge cavity for discharge experiments.

[0046] In order to facilitate the installation of the inner guide rail 51, a pad 16 is provided on the inner wall of the insulating body 1, and the inner guide rail 51 is fixedly connected to the inner wall of the insulating body 1 through the pad 16; the circulating solution is a salt solution, which achieves the purpose of cooling and dissipating the water resistor 19. The outer wall of the insulating body 1 is connected to the support frame 6, and the height of the insulating body 1 can be adjusted through the support frame 6. The detection equipment uses an oscilloscope.

[0047] Before the experiment, after the discharge circuit is connected, the front cover 2 is sealed and connected to the insulating body 1, and the air in the discharge cavity is extracted and discharged into the external atmosphere by using the gas recovery device 7, so that the discharge cavity is in a vacuum state, and the vacuum degree is less than or equal to 10 -2 Pa; then the discharge cavity is filled with compressed air or FS6 and other gases to a high pressure state, the pressure of which is 0.2Mpa to 0.5Mpa, so that the gas pressure in the discharge cavity can be adjusted within the tolerance range of the insulating body 1; the discharge cavity is subjected to a discharge experiment under a high pressure environment.

[0048] In the experiment, a high-voltage power supply is used to charge the capacitor 18. When the capacitor 18 reaches a preset voltage, the high-voltage pulse power supply is controlled to generate a trigger signal, so that the gas switch 20 is turned on to release energy to the circulating solution of the water resistor 19. At the same time, an oscilloscope is used to observe and record the discharge waveform, and the discharge process is recorded by taking photos through the observation window 3 to complete a discharge experiment. The state in the discharge cavity can also be kept unchanged to conduct multiple experiments.

[0049] After the experiment, the gas in the discharge cavity is extracted and recovered into the gas cylinder by the gas recovery device 7, so that the discharge cavity is in a vacuum state, and then the discharge cavity is filled with air to a normal pressure state, so that the cover can be opened smoothly, and the experiment ends here.

[0050] The high-voltage gas insulation experimental device of the present invention can provide a high-voltage gas insulation environment to enhance the insulation capacity in the discharge cavity. The rear cover plate 8 integrates the functions of water circulation, gas circulation, electrical signal measurement, high-voltage charging, and low-voltage charging under the condition of airtightness. The observation window 3 can be used to observe the discharge process of the gas switch 20 and provide conditions for taking pictures. The discharge cavity contains an inner guide rail 51, thereby ensuring that the operating platform 15 can slide to the outside of the discharge cavity, facilitating operation, and completing a set of systematic high-voltage discharge experiments.

[0051] The steps of the high-voltage gas insulation test method based on the above-mentioned high-voltage gas insulation test device of the present invention are specifically as follows:

[0052] S1, using the operating platform 15 and the outer guide rail 52 to move the discharge circuit to the flatbed car 4 outside the discharge cavity, and prepare the above-mentioned high-voltage gas insulation experimental device;

[0053] The positive and negative electrodes of the capacitor 18 are connected to the inner ends of the positive high-voltage charging flange and the negative high-voltage charging flange through the wires passing through the charging insulating rod 14, and the outer ends of the positive high-voltage charging flange and the negative high-voltage charging flange are connected to the positive electrode of the external high-voltage power supply respectively; the gas switch 20 is connected to the inner end of the triggering high-voltage pulse flange through the wires passing through the charging insulating rod 14, and the outer end of the triggering high-voltage pulse flange is connected to the external high-voltage pulse power supply; the water resistor 19 is connected to the external water source through the gas and water flanges 11, and the rear cover plate 8 is connected to the external equipment through the gas and water flanges 11;

[0054] S2. Inflate the gas switch 20 to a first preset pressure of 0.2Mpa to 0.8Mpa, and after the water resistor 19 is filled with the circulating solution, use the operating platform 15 to slide on the inner guide rail 51 and the outer guide rail 52 to move the discharge circuit into the discharge cavity, and seal the front cover plate 2 with the insulating body 1;

[0055] S3, evacuate the discharge chamber to a temperature less than or equal to 10 -2 Pa, and then fill the discharge cavity with SF 6 The gas is compressed to a second preset pressure of 0.2 MPa to 0.5 MPa; in other embodiments, the discharge cavity may also be filled with compressed air;

[0056] S4. Use a high-voltage power supply to charge the capacitor 18. When the capacitor 18 reaches a preset voltage of 50-100k, control the high-voltage pulse power supply to generate a trigger signal, so that the gas switch 20 is turned on to release energy to the circulating solution of the water resistor 19. At the same time, use the detection equipment to observe and record the waveform of the discharge circuit to complete a discharge experiment.

Claims

1. A high voltage gas insulation test device, used for discharge test of discharge circuit, characterized by: It comprises an insulating body (1), a front cover plate (2) sealedly connected to the front end of the insulating body (1), a rear cover plate (8) sealedly connected to the rear end of the insulating body (1), an inner guide rail (51) fixedly arranged on the inner wall of the insulating body (1), an outer guide rail (52) arranged outside the insulating body (1) and connected to the inner guide rail (51), an operating platform (15) slidably connected to the inner guide rail (51) and / or the outer guide rail (52), and a barometer and a detection device; the operating platform (15) is used to set a discharge circuit; A sealed discharge cavity is formed between the insulating body (1), the front cover plate (2) and the rear cover plate (8); The barometer is arranged on the insulating body (1) and is used to monitor the gas pressure of the discharge cavity in real time; A charging flange (10), gas and water path flanges (11) and a measuring flange (12) are sealed on the outer wall of the rear cover plate (8), and a charging insulating rod (14) is provided at a position corresponding to the charging flange (10) on the inner wall, and the charging insulating rod (14) is sealed and connected to the inner wall; The capacitor (18) in the discharge circuit is connected to the inner end of the charging flange (10) through a wire passing through the charging insulating rod (14), and the outer end of the charging flange (10) is connected to an external high-voltage power supply for charging the capacitor (18); the gas switch (20) in the discharge circuit is connected to the inner end of the charging flange (10) through a wire passing through the charging insulating rod (14), and the outer end of the charging flange (10) is connected to an external high-voltage pulse power supply for controlling the gas switch (20) to be turned on in the discharge cavity to perform a discharge experiment; the water resistor (19) in the discharge circuit is connected to an external water source through a water channel port of the gas channel and water channel flange (11), and is used to charge the water resistor (19) with a circulating solution to receive the energy released when the gas switch (20) is turned on and discharged; the gas channel port of the gas channel and water channel flange (11) is connected to an external device, and is used to inflate or exhaust the discharge cavity; the voltage and current sensor in the discharge circuit is connected to a detection device through a measuring flange (12), and is used to observe and record the waveform of the discharge circuit in real time.

2. A high voltage gas insulation test device according to claim 1, characterized in that: The charging flange (10) comprises a positive high-voltage charging flange, a negative high-voltage charging flange and a triggering high-voltage pulse flange; The positive electrode and the negative electrode of the capacitor (18) are connected to the inner ends of the positive high-voltage charging flange and the negative high-voltage charging flange through wires passing through the charging insulating rod (14), and the outer ends of the positive high-voltage charging flange and the negative high-voltage charging flange are connected to the positive electrode of the external high-voltage power supply. The gas switch (20) is connected to the inner end of the triggering high-voltage pulse flange through a wire passing through the charging insulating rod (14), and the outer end of the triggering high-voltage pulse flange is connected to an external high-voltage pulse power supply.

3. A high voltage gas insulation test device according to claim 2, characterized in that: It also includes observation windows (3) respectively arranged on the front cover plate (2) and on the opposite side walls of the insulating body (1), the observation windows (3) being used to take photos and record the discharge process; The observation window (3) comprises an insulating welding seat, a pressure ring and a glass window; through holes adapted to one end of the insulating welding seat are respectively provided on the front cover plate (2) and the opposite side walls of the insulating body (1); one end of the insulating welding seat is connected to the front cover plate (2) or the insulating body (1), the glass window is provided at the other end of the insulating welding seat, and the pressure ring is used to tightly fix the glass window to the other end of the insulating welding seat.

4. A high voltage gas insulation test device according to claim 1, 2 or 3, characterized in that: It also includes a plurality of connecting shafts and a plurality of rollers adapted to the inner guide rail (51) and the outer guide rail (52); The operating platform (15) is provided with mounting holes corresponding to the inner guide rail (51) and the outer guide rail (52) on both sides along the sliding direction; The roller is fixedly connected to the mounting hole via a connecting shaft.

5. A high voltage gas insulation test device according to claim 4, characterized in that: It also includes a cushion block (16) and a support frame (6); the inner guide rail (51) is fixedly connected to the inner wall of the insulating body (1) via the cushion block (16); and the support frame (6) is connected to the outer wall of the insulating body (1); One side of the front cover plate (2) is hinged to the insulating body (1); The rear cover plate (8) is provided with a spare flange (13); The circulating solution is a saline solution; The detection device adopts an oscilloscope.

6. A high voltage gas insulation test method, characterized in that: The following steps are involved: S1. Prepare a high-voltage gas insulation experimental device as described in any one of claims 1 to 5; S2, after the gas switch (20) is inflated to a first preset gas pressure and the water resistor (19) is filled with a circulating solution, the operating platform (15) is slid on the inner guide rail (51) and the outer guide rail (52) to move the discharge circuit into the discharge cavity, and the front cover plate (2) and the rear cover plate (8) are sealed and connected to the insulating body (1); S3, evacuate the discharge chamber to a temperature less than or equal to 10 -2 Pa, and then the discharge cavity is filled with gas to a second preset pressure; S4, charging the capacitor (18). When the capacitor (18) reaches a preset voltage, the high-voltage pulse power supply is controlled to generate a trigger signal, so that the gas switch (20) is turned on to release energy to the circulating solution of the water resistor (19). At the same time, the waveform of the discharge circuit is observed and recorded by the detection equipment, thereby completing a discharge experiment.

7. A high voltage gas insulation test method according to claim 6, characterized in that: Also includes S5: The gas in the discharge cavity is recovered into the gas cylinder to make the discharge cavity a vacuum state, and then filled with air to normal pressure to ensure that the front cover (2) can be opened smoothly, thus ending the experiment.

8. A high voltage gas insulation test method according to claim 7, characterized in that: Step S1 is specifically as follows: The positive electrode and negative electrode of the capacitor (18) are connected to the inner ends of the positive high-voltage charging flange and the negative high-voltage charging flange through a wire passing through the charging insulating rod (14), and the outer ends of the positive high-voltage charging flange and the negative high-voltage charging flange are connected to the positive electrode of an external high-voltage power supply; the gas switch (20) is connected to the inner end of the triggering high-voltage pulse flange through a wire passing through the charging insulating rod (14), and the outer end of the triggering high-voltage pulse flange is connected to the external high-voltage pulse power supply; the voltage and current sensor is connected to the detection equipment through the measuring flange (12); the water resistor (19) is connected to the external water source through the gas path and water path flange (11), and the rear cover plate (8) is connected to the external equipment through the gas path and water path flange (11).

9. A high voltage gas insulation test method according to claim 8, characterized in that: In step S2, the first preset air pressure is 0.2Mpa to 0.8Mpa.

10. A high voltage gas insulation test method according to claim 9, characterized in that: In step S3, the gas is SF6 or compressed air; the second preset gas pressure is 0.2Mpa to 0.5Mpa; In step S4, the preset voltage is 50 kV-100 kV.

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