Visual high-voltage gas discharge cavity suitable for low-temperature condition

Abstract

The invention discloses a visual high-voltage gas discharge cavity suitable for a low-temperature condition, relates to a gas discharge test device, and aims to solve the problems that the corona discharge process cannot be observed by naked eyes and the discharge test is not suitable for being carried out under the low-temperature condition in the conventional stainless steel high-voltage gas discharge cavity. A transparent cavity barrel is of a cylindrical structure with two open ends; the two inner flanges cover the two ends of the transparent cavity barrel respectively, and the two inner flanges and the transparent cavity barrel form a closed space; the two outer flanges are attached to the two inner flanges respectively. An electrode is fixed in the center of the outer flange; the two high-voltage bushings are respectively arranged in a staggered manner, and the two high-voltage bushings respectively penetrate through the two outer flanges and the two inner flanges; the transparent cavity barrel and the two high-voltage bushings are all made of low-temperature-resistant materials. The invention has the beneficial effects of visibility and low temperature resistance.

Description

Technical Field

[0001] The invention relates to a gas discharge test device. Background Art

[0002] High-voltage gas discharge test is an important means to test the insulation performance of gas. Through high-voltage gas discharge test, the dielectric strength of gas under test conditions can be obtained, which has important guiding significance for the design of insulation structure of electrical equipment. In order to meet the sealing strength under high pressure conditions, the current discharge test chamber is mostly made of stainless steel and other materials. The corona discharge process cannot be observed with the naked eye, and the connection and fixing parts of the existing stainless steel high-voltage gas discharge chamber are only suitable for normal temperature environment, not for discharge test under low temperature conditions. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the corona discharge process cannot be observed with the naked eye in the existing high-voltage gas discharge chamber made of stainless steel and is not suitable for discharge testing under low temperature conditions, and proposes a visualized high-voltage gas discharge chamber suitable for low temperature conditions.

[0004] The present invention discloses a visualized high-voltage gas discharge cavity suitable for low-temperature conditions, comprising two outer flanges, two inner flanges, a transparent cavity barrel and two high-voltage bushings;

[0005] The transparent cavity barrel is a cylindrical structure with openings at both ends;

[0006] The two inner flanges cover the two ends of the transparent cavity barrel respectively, and the two inner flanges and the transparent cavity barrel form a closed space;

[0007] The two outer flanges are respectively fitted together with the two inner flanges; an electrode is fixed at the center of the outer flange;

[0008] The two high-voltage bushings are arranged in a staggered manner, and the two high-voltage bushings penetrate the two outer flanges and the two inner flanges respectively; wherein the transparent cavity barrel and the two high-voltage bushings are made of low-temperature resistant materials.

[0009] Furthermore, the discharge cavity also includes a sealing rubber ring;

[0010] The sealing rubber ring is an annular structure, and the sealing rubber ring is arranged between the outer flange and the inner flange.

[0011] Furthermore, the sealing rubber ring is made of epoxy resin.

[0012] Furthermore, the outer flange is provided with a plurality of outer flange fixing bolt through holes, a sealing ring groove, an electrode hole, a high-voltage bushing hole and a plurality of bushing fixing bolt holes;

[0013] The electrode hole is located at the center of the outer flange;

[0014] The plurality of outer flange fixing bolt through holes are arranged in a circumferential manner at the outer edge of the outer flange;

[0015] The high-voltage bushing hole is arranged close to the electrode hole;

[0016] The plurality of bushing fixing bolt holes are arranged circumferentially around the high-voltage bushing hole;

[0017] The sealing ring groove is an annular structure;

[0018] The sealing rubber ring is arranged in the sealing ring groove.

[0019] Furthermore, the inner flange is provided with a plurality of inner flange fixing bolt through holes, a transparent cavity barrel groove and a center hole;

[0020] The center hole is located at the center of the inner flange, and the high-voltage bushing passes through the center hole and extends to the inside of the transparent cavity barrel;

[0021] The plurality of inner flange fixing bolt through holes are arranged at the outer edge of the inner flange in a circumferential arrangement, and the plurality of inner flange fixing bolt through holes are respectively opposite to the plurality of outer flange fixing bolt through holes;

[0022] The transparent cavity barrel groove is an annular structure, the transparent cavity barrel groove is located between the center hole and a plurality of inner flange fixing bolt through holes, and the transparent cavity barrel groove is used to fix the transparent cavity barrel.

[0023] Furthermore, the discharge chamber also includes flange fixing bolts;

[0024] The flange fixing bolts are inserted into the outer flange fixing bolt through holes and the inner flange fixing bolt through holes in sequence.

[0025] Furthermore, the discharge chamber also includes a sleeve fixing bolt;

[0026] The bushing fixing bolt is inserted into the fixing hole of the high-voltage bushing and the bushing fixing bolt hole in sequence.

[0027] Furthermore, a reserved expansion hole is provided on the outer flange;

[0028] The reserved expansion hole is arranged between the electrode hole and the sealing ring groove.

[0029] Furthermore, the transparent cavity barrel is made of glass, and the thickness of the transparent cavity barrel is proportional to the discharge test pressure condition.

[0030] Furthermore, the high voltage bushing is made of composite silicone rubber.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention proposes a visualized gas discharge cavity suitable for low-temperature conditions. The transparent cavity barrel and two high-voltage bushings are made of low-temperature resistant materials, and discharge tests can be carried out under a wide temperature range from -200°C to room temperature. At the same time, the transparent cavity barrel has visibility, which is convenient for observing the corona discharge process at any time. The electrode holes can carry a variety of discharge electrodes, which is suitable for needle-plate discharge, ball-plate discharge, and Townsend discharge tests. The transparent setting of the transparent cavity barrel can directly observe corona discharge, breakdown discharge and other processes, and is suitable for various scenarios such as teaching and scientific research. In addition, the outer flange is provided with a reserved expansion hole, which can be connected to liquid nitrogen for pre-cooling of the discharge cavity, or to connect temperature measurement and air pressure measurement sensors in the cavity, so as to facilitate high-voltage gas discharge tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a front structural cross-sectional view of a visualized high-voltage gas discharge cavity suitable for low-temperature conditions as described in the first embodiment;

[0034] Figure 2 It is a side view of a visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in the first embodiment;

[0035] Figure 3 It is a structural schematic diagram of the outer flange in the fourth specific implementation mode;

[0036] Figure 4 It is a structural schematic diagram of the inner flange in the fifth specific implementation mode;

[0037] Among them, 1 is the outer flange; 1-1 is the outer flange fixing bolt through hole; 1-2 is the sealing ring groove; 1-3 is the electrode hole; 1-4 is the high-voltage bushing hole; 1-5 is a plurality of bushing fixing bolt holes; 2 is the inner flange; 2-1 is the inner flange fixing bolt through hole; 2-2 is the transparent cavity barrel groove; 2-3 is the center hole glass cavity barrel; 3 is the transparent cavity barrel; 4 is the sealing rubber ring; 5 is the reserved expansion hole; 6 is the flange fixing bolt; 7 is the bushing fixing bolt; 8 is the high-voltage bushing. DETAILED DESCRIPTION

[0038] Specific implementation method 1. Combination Figure 1 to Figure 2 This embodiment is described as a visualized high-voltage gas discharge cavity suitable for low-temperature conditions. The discharge cavity includes two outer flanges 1, two inner flanges 2, a transparent cavity barrel 3 and two high-voltage bushings 8;

[0039] The transparent chamber barrel 3 is a cylindrical structure with openings at both ends;

[0040] The two inner flanges 2 cover the two ends of the transparent cavity barrel 3 respectively, and the two inner flanges 2 and the transparent cavity barrel 3 form a closed space; the closed space is the discharge cavity;

[0041] The two outer flanges 1 are respectively attached to the two inner flanges 2; an electrode 9 is fixed at the center of the outer flange 1;

[0042] The two high-voltage bushings 8 are respectively arranged in a staggered manner, and the two high-voltage bushings 8 respectively penetrate the two outer flanges 1 and the two inner flanges 2; wherein the transparent cavity barrel 3 and the two high-voltage bushings 8 are both made of low-temperature resistant materials.

[0043] In this embodiment, the transparent cavity barrel 3 is made of transparent material, which is convenient for observing the discharge process such as corona discharge and breakdown discharge with the naked eye; the transparent cavity barrel 3 and the two high-voltage bushings 8 are made of low-temperature resistant materials, and the discharge test can be carried out under a wide temperature range from -200°C to room temperature (25°C); the center of the outer flange 1 can be equipped with discharge electrodes of different structures to achieve a variety of discharge conditions. The inner flange 2 and the transparent cavity barrel 3 are bonded and fixed with low-temperature resistant insulating glue.

[0044] After the visualized high-voltage gas discharge cavity described in this embodiment is installed as a whole, it is placed on a plane with an outer flange 1 on one side, and is fixed by the outer flange 1 to prevent the visualized high-voltage gas discharge cavity from rolling; if a constant temperature is required for a long time, the visualized high-voltage gas discharge cavity can be placed in an insulation box as a whole.

[0045] In this embodiment, a high voltage is applied to the electrode 9 by the high-voltage bushing 8; therefore, the high-voltage bushing 8 needs to be arranged close to the electrode 9, and the high-voltage bushing 8 has the functions of insulation, fixing the lead and protecting the equipment from damage; the high-voltage bushing 8 needs to meet the test voltage level requirements, the high-voltage bushing 8 needs to be installed in a staggered manner, and the insulation margin is designed according to the specific discharge conditions.

[0046] Specific implementation method 2: This implementation method further limits the visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in specific implementation method 1. In this implementation method, the discharge cavity further includes a sealing rubber ring 4;

[0047] The sealing rubber ring 4 is an annular structure, and the sealing rubber ring 4 is arranged between the outer flange 1 and the inner flange 2 .

[0048] In this embodiment, the sealing rubber ring 4 is provided to increase the airtightness between the outer flange 1 and the inner flange 2 .

[0049] Specific implementation method three: This implementation method further limits the visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in specific implementation method two. In this implementation method, the sealing rubber ring 4 is made of epoxy resin.

[0050] In this embodiment, epoxy resin is a low-temperature resistant material, which can ensure the normal sealing effect of the visible high-voltage gas discharge cavity in a low-temperature environment.

[0051] Specific implementation method 4. Combination Figure 3 This embodiment is described. This embodiment further defines a visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in the second embodiment. In this embodiment, the outer flange 1 is provided with a plurality of outer flange fixing bolt through holes 1-1, a sealing ring groove 1-2, an electrode hole 1-3, a high-voltage bushing hole 1-4 and a plurality of bushing fixing bolt holes 1-5;

[0052] The electrode hole 1-3 is located at the center of the outer flange 1, and the electrode hole 1-3 is used to pass the electrode 9;

[0053] The plurality of outer flange fixing bolt through holes 1-1 are arranged at the outer edge of the outer flange 1 in a circumferential arrangement; the plurality of outer flange fixing bolt through holes 1-1 are used to fix the outer flange 1 and the inner flange 2 together;

[0054] The high-voltage bushing hole 1-4 is arranged close to the electrode hole 1-3; the high-voltage bushing hole 1-4 is used to insert the high-voltage bushing 8;

[0055] The plurality of bushing fixing bolt holes 1-5 are arranged around the high-voltage bushing hole 1-4 in a circumferential arrangement; the plurality of bushing fixing bolt holes 1-5 are used to fix the high-voltage bushing 8;

[0056] The sealing ring groove 1-2 is an annular structure;

[0057] The sealing rubber ring 4 is arranged in the sealing ring groove 1 - 2 .

[0058] In this embodiment, the sealing rubber ring 4 is arranged in the sealing ring groove 1-2, the sealing effect is better, and the sealing ring groove 1-2 can prevent the sealing rubber ring 4 from shifting during use; the number of the outer flange fixing bolt through holes 1-1 is six; the six outer flange fixing bolt through holes 1-1 are evenly distributed; the setting of the electrode hole 1-3 can carry a variety of discharge electrodes, which is suitable for carrying out needle-plate discharge, ball-plate discharge, and Townsend discharge tests; the setting of the high-voltage bushing hole 1-4 and the bushing fixing bolt hole 1-5 makes the way of fixing the high-voltage bushing 8 simpler, and the insulation, lead fixing and protection equipment functions of the high-voltage bushing 8 are more obvious.

[0059] Specific implementation method V. Combination Figure 4This embodiment is described. This embodiment further defines a visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in the second embodiment. In this embodiment, the inner flange 2 is provided with a plurality of inner flange fixing bolt through holes 2-1, a transparent cavity barrel groove 2-2 and a center hole 2-3;

[0060] The central hole 2-3 is located at the center of the inner flange 2, and the high-voltage bushing 8 passes through the central hole 2-3 and extends to the inside of the transparent cavity barrel 3;

[0061] The plurality of inner flange fixing bolt through holes 2-1 are arranged at the outer edge of the inner flange 2 in a circumferentially arranged manner, and the plurality of inner flange fixing bolt through holes 2-1 are respectively opposite to the plurality of outer flange fixing bolt through holes 1-1;

[0062] The transparent cavity barrel groove 2-2 is an annular structure, and the transparent cavity barrel groove 2-2 is located between the center hole 2-3 and a plurality of inner flange fixing bolt through holes 2-1, and the transparent cavity barrel groove 2-2 is used to fix the transparent cavity barrel 3.

[0063] In this embodiment, the setting of the transparent cavity barrel groove 2-2 makes the fixing effect between the inner flange 2 and the transparent cavity barrel 3 better, and prevents the transparent cavity barrel 3 from shifting during use; the number of the inner flange fixing bolt through holes 2-1 is six; the positions of the six inner flange fixing bolt through holes 2-1 correspond one to one with the positions of the six outer flange fixing bolt through holes 1-1, which is convenient for fixation; the setting of the center hole 2-3 is to prevent the inner flange 2 from affecting the setting of the electrode 6 and the high-voltage bushing 8.

[0064] Specific implementation method 6: This implementation method further defines the visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in specific implementation method 5. In this implementation method, the discharge cavity further includes a flange fixing bolt 6;

[0065] The flange fixing bolts 6 are inserted into the outer flange fixing bolt through holes 1 - 1 and the inner flange fixing bolt through holes 2 - 1 in sequence.

[0066] In this embodiment, the outer flange 1 and the inner flange 2 are fixed by adding flange fixing bolts 6 .

[0067] Specific implementation manner VII: This implementation manner further defines a visualized high-voltage gas discharge cavity suitable for low-temperature conditions as described in specific implementation manner IV. In this implementation manner, the discharge cavity further includes a sleeve fixing bolt 7;

[0068] The bushing fixing bolt 7 is inserted into the fixing hole of the high-voltage bushing 8 and the bushing fixing bolt holes 1 - 5 in sequence.

[0069] In this embodiment, the high-voltage bushing 8 is fixed on the outer flange 1 by adding bushing fixing bolts 7 .

[0070] Specific implementation eight: This implementation further defines a visualized high-voltage gas discharge cavity suitable for low-temperature conditions as described in specific implementation four. In this implementation, a reserved expansion hole 5 is further provided on the outer flange 1;

[0071] The reserved expansion hole 5 is arranged between the electrode hole 1-3 and the sealing ring groove 1-2; the reserved expansion hole 5 is used to introduce liquid nitrogen into the transparent cavity barrel 3 or to install a gas temperature sensor and an air pressure measurement sensor.

[0072] In this embodiment, after the installation is completed as required, liquid nitrogen volatilization gas is passed through the reserved expansion hole 5 for pre-cooling, and the discharge chamber is evacuated after approaching the test temperature, and the gas at the test temperature is rushed into the transparent chamber barrel 3 to the test pressure, and a high voltage is applied to the electrode 9 by the high-voltage bushing 8 until the expected discharge process is observed or detected, and the test is completed. By adding the reserved expansion hole 5, liquid nitrogen can be connected to pre-cool the discharge chamber, or the temperature measurement and air pressure measurement sensors in the chamber can be connected to realize multiple expansion functions such as discharge chamber pre-cooling, temperature measurement, and air pressure measurement, which is convenient for high-voltage gas discharge testing.

[0073] Specific implementation method 9. This implementation method further limits the visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in specific implementation method 1. In this implementation method, the transparent cavity barrel 3 is made of glass, and the thickness of the transparent cavity barrel 3 is proportional to the discharge test pressure condition.

[0074] In this embodiment, glass is a highly transparent and low-temperature resistant material, and the thickness of the glass material of the transparent cavity barrel 3 is selected according to the discharge test pressure conditions.

[0075] Specific implementation method 10: This implementation method further limits the visualized high-voltage gas discharge cavity suitable for low-temperature conditions described in specific implementation method 1. In this implementation method, the high-voltage bushing 8 is made of composite silicone rubber.

[0076] In this embodiment, the composite silicone rubber is a low-temperature resistant insulating material, and its insulating performance is not affected by low temperature, thereby ensuring that the high-voltage bushing 8 meets the requirements of the test voltage level.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A visual high-voltage gas discharge chamber suitable for low-temperature conditions, characterized in that: The discharge cavity comprises two outer flanges (1), two inner flanges (2), a transparent cavity barrel (3) and two high-voltage bushings (8); The transparent cavity barrel (3) is a cylindrical structure with openings at both ends; The two inner flanges (2) respectively cover the two ends of the transparent cavity barrel (3), and the two inner flanges (2) and the transparent cavity barrel (3) form a closed space; The two outer flanges (1) are respectively fitted together with the two inner flanges (2); an electrode (9) is fixed at the center of the outer flange (1); The two high-voltage bushings (8) are arranged in a staggered manner, and the two high-voltage bushings (8) respectively penetrate the two outer flanges (1) and the two inner flanges (2); wherein the transparent cavity barrel (3) and the two high-voltage bushings (8) are both made of low-temperature resistant materials.

2. A visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 1, characterized in that: The discharge cavity also includes a sealing rubber ring (4); The sealing rubber ring (4) is an annular structure, and the sealing rubber ring (4) is arranged between the outer flange (1) and the inner flange (2).

3. A visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 2, characterized in that: The sealing rubber ring (4) is made of epoxy resin.

4. A visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 2, characterized in that: The outer flange (1) is provided with a plurality of outer flange fixing bolt through holes (1-1), a sealing ring groove (1-2), an electrode hole (1-3), a high-voltage bushing hole (1-4) and a plurality of bushing fixing bolt holes (1-5); The electrode hole (1-3) is located at the center of the outer flange (1); The plurality of outer flange fixing bolt through holes (1-1) are arranged at the outer edge of the outer flange (1) in a circumferentially arranged manner; The high-voltage bushing hole (1-4) is arranged close to the electrode hole (1-3); The plurality of bushing fixing bolt holes (1-5) are arranged around the high-voltage bushing hole (1-4) in a circumferential arrangement; The sealing ring groove (1-2) is an annular structure; The sealing rubber ring (4) is arranged in the sealing ring groove (1-2).

5. A visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 4, characterized in that: The inner flange (2) is provided with a plurality of inner flange fixing bolt through holes (2-1), a transparent cavity barrel groove (2-2) and a center hole (2-3); The center hole (2-3) is located at the center of the inner flange (2), and the high-voltage bushing (8) penetrates through the center hole (2-3) and extends to the inside of the transparent cavity barrel (3); The plurality of inner flange fixing bolt through holes (2-1) are arranged at the outer edge of the inner flange (2) in a circumferentially arranged manner, and the plurality of inner flange fixing bolt through holes (2-1) are respectively opposite to the plurality of outer flange fixing bolt through holes (1-1); The transparent cavity barrel groove (2-2) is an annular structure, the transparent cavity barrel groove (2-2) is located between the central hole (2-3) and a plurality of inner flange fixing bolt through holes (2-1), and the transparent cavity barrel groove (2-2) is used to fix the transparent cavity barrel (3).

6. The visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 5, characterized in that: The discharge chamber also includes flange fixing bolts (6); The flange fixing bolts (6) are inserted into the outer flange fixing bolt through holes (1-1) and the inner flange fixing bolt through holes (2-1) in sequence.

7. The visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 4, characterized in that: The discharge chamber also includes a sleeve fixing bolt (7); The bushing fixing bolt (7) is sequentially inserted into the fixing hole of the high-voltage bushing (8) and the bushing fixing bolt hole (1-5).

8. The visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 4, characterized in that: The outer flange (1) is also provided with a reserved expansion hole (5); The reserved expansion hole (5) is arranged between the electrode hole (1-3) and the sealing ring groove (1-2).

9. The visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 1, characterized in that: The transparent cavity barrel (3) is made of glass, and the thickness of the transparent cavity barrel (3) is proportional to the discharge test pressure condition.

10. The visual high-voltage gas discharge chamber suitable for low-temperature conditions according to claim 1, characterized in that: The high-voltage bushing (8) is made of composite silicone rubber.

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