CN111273139A - Testing cavity for thermal state gas breakdown characteristics - Google Patents
Testing cavity for thermal state gas breakdown characteristics Download PDFInfo
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- CN111273139A CN111273139A CN202010114053.1A CN202010114053A CN111273139A CN 111273139 A CN111273139 A CN 111273139A CN 202010114053 A CN202010114053 A CN 202010114053A CN 111273139 A CN111273139 A CN 111273139A
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- accommodating space
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The application provides a test cavity of thermal state gas breakdown characteristic includes: the stainless steel shell forms an accommodating space, the accommodating space contains test gas, and the stainless steel shell is grounded; the high-voltage insulating sleeve is embedded on the stainless steel shell; the electrode and the at least two quartz lamps are positioned in the accommodating space; the electrodes comprise a static electrode and a dynamic electrode which are oppositely arranged; the static electrode is fixedly connected with a breakdown test high-voltage electrode positioned outside the stainless steel shell through a high-voltage insulating sleeve; the moving electrode is fixedly connected with an external hand wheel positioned outside the accommodating space and is grounded; the pressure sensor is embedded on the stainless steel shell; the temperature sensor is embedded on the stainless steel shell; and the temperature control module is electrically connected with the temperature measuring ends of the quartz lamp and the temperature sensor. The breakdown characteristic of the hot gas of thousands of degrees centigrade can be obtained through a test mode.
Description
Technical Field
The application relates to a test cavity, and particularly relates to a test cavity for thermal state gas breakdown characteristics.
Background
After the circuit breaker opens the arc, the gas temperature in the arc chamber is still very high, reaching thousands of degrees centigrade. The breakdown characteristics of the hot gas in the arc chamber, which typically include dielectric strength and recovery strength, are critical to whether the circuit breaker can withstand the post-arc recovery voltage.
The breakdown characteristics of the hot gas are different from those of the room temperature gas, and the dielectric strength of the hot gas is obviously lower than that of the room temperature gas. Therefore, the breakdown characteristic of the hot gas can be grasped by a test mode. However, at present, a test chamber capable of heating gas to thousands of degrees centigrade is absent, and it is difficult to obtain the breakdown characteristic of hot gas at thousands of degrees centigrade by means of a test.
Therefore, how to provide a testing chamber with thermal state gas breakdown characteristics has become an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
The application provides a thermal state gas breakdown characteristic's test cavity to solve and be difficult to acquire the breakdown characteristic scheduling problem of the thermal state gas of thousands of degrees centigrade through the mode of test.
The application provides a test cavity of thermal state gas breakdown characteristic includes:
the test device comprises a stainless steel shell, a test gas inlet, a test gas outlet and a test gas outlet, wherein the stainless steel shell forms an accommodating space, the test gas is accommodated in the accommodating space, and the stainless steel shell is grounded;
the high-voltage insulating sleeve is embedded on the stainless steel shell, one end of the high-voltage insulating sleeve is positioned in the accommodating space, and the other end of the high-voltage insulating sleeve is positioned outside the accommodating space;
the electrode is positioned in the accommodating space; the electrodes comprise a static electrode and a dynamic electrode which are oppositely arranged; the static electrode is fixedly connected with a breakdown test high-voltage electrode positioned outside the stainless steel shell through the high-voltage insulating sleeve; the moving electrode is fixedly connected with an external hand wheel positioned outside the accommodating space and is grounded;
at least two quartz lamps, wherein the at least two quartz lamps are positioned in the accommodating space;
the pressure sensor is embedded on the stainless steel shell, and the pressure measuring end of the pressure sensor is positioned in the accommodating space;
the temperature sensor is embedded on the stainless steel shell; the temperature measuring end of the temperature sensor is positioned in the accommodating space, and the electric connection end of the temperature sensor is positioned outside the accommodating space;
and the temperature control module is electrically connected with the quartz lamp and the temperature measuring end of the temperature sensor.
According to the technical scheme, the test cavity for the thermal state gas breakdown characteristic comprises: the test device comprises a stainless steel shell, a test gas inlet, a test gas outlet and a test gas outlet, wherein the stainless steel shell forms an accommodating space, the test gas is accommodated in the accommodating space, and the stainless steel shell is grounded; the high-voltage insulating sleeve is embedded on the stainless steel shell, one end of the high-voltage insulating sleeve is positioned in the accommodating space, and the other end of the high-voltage insulating sleeve is positioned outside the accommodating space; the electrode is positioned in the accommodating space; the electrodes comprise a static electrode and a dynamic electrode which are oppositely arranged; the static electrode is fixedly connected with a breakdown test high-voltage electrode positioned outside the stainless steel shell through the high-voltage insulating sleeve; the moving electrode is fixedly connected with an external hand wheel positioned outside the accommodating space and is grounded; at least two quartz lamps, wherein the at least two quartz lamps are positioned in the accommodating space; the pressure sensor is embedded on the stainless steel shell, and the pressure measuring end of the pressure sensor is positioned in the accommodating space; the temperature sensor is embedded on the stainless steel shell; the temperature measuring end of the temperature sensor is positioned in the accommodating space, the electric connection end of the temperature sensor is positioned on the temperature control module outside the accommodating space, and the temperature control module is electrically connected with the quartz lamp and the temperature measuring end of the temperature sensor. Through the test cavity of a thermal state gas breakdown characteristic of this application, exert voltage through electrode pair test gas, carry out radiant heating through the quartz lamp to test gas, can realize obtaining the breakdown characteristic of the thermal state gas of thousands of degrees centigrade through the mode of test.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a thermal state gas breakdown characteristic testing chamber provided in the present application;
FIG. 2 is a schematic structural diagram of another thermal state gas breakdown characteristic testing chamber provided herein;
FIG. 3 is a schematic structural diagram of another thermal state gas breakdown characteristic testing chamber provided herein;
FIG. 4 is a top view of the quartz lamp arrangement shown in FIG. 3;
fig. 5 is a schematic structural diagram of another thermal state gas breakdown characteristic testing chamber provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a testing chamber with thermal state gas breakdown characteristics according to the present application. As shown in fig. 1, the present application provides a thermal state gas breakdown characteristic testing chamber, comprising: the device comprises a stainless steel shell 1, a high-voltage insulating sleeve 2, an electrode 3, a breakdown test high-voltage electrode 4, an external hand wheel 5, at least two quartz lamps 6, a pressure sensor 7, a temperature sensor 8 and a temperature control module 9. The stainless steel shell 1 forms an accommodating space 101, the accommodating space 101 accommodates a test gas (not shown in fig. 1), and the stainless steel shell 1 is grounded; the test gas may be pure air, and the present application is not particularly limited. The high-voltage insulating bushing 2 penetrates through the side wall of the stainless steel shell 1 and is embedded in the side wall of the stainless steel shell 1, one end 21 of the high-voltage insulating bushing 2 is located in the accommodating space 101, and the other end 22 of the high-voltage insulating bushing is located outside the accommodating space 101. The electrode 3 and at least two quartz lamps 6 are arranged in the accommodating space 101; the electrode 3 comprises a static electrode 31 and a dynamic electrode 32 which are oppositely arranged; the breakdown test high-voltage electrode 4 penetrates through the high-voltage insulating sleeve 2, one end of the breakdown test high-voltage electrode 4 is left outside the accommodating space 101, and the other end of the breakdown test high-voltage electrode 4 is fixedly connected with the static electrode 31; the external hand wheel 5 outside the accommodating space 101 is fixedly connected with the moving electrode 32 through the hand lever 51, and the moving electrode 32 is grounded (not shown in fig. 1). The hand lever 51 and the stainless steel shell 1 can be in threaded connection, and the distance between the movable electrode 32 and the static electrode 31 can be adjusted by rotating the external hand wheel 5, so that the distance between the static electrode 31 and the movable electrode 32 reaches a set distance; the static electrode 31 and the dynamic electrode 32 are used for applying a voltage in the test gas, when the applied voltage value is steeply reduced, the test gas is broken down, and the breakdown voltage of the test gas can be measured to obtain the breakdown characteristic of the test gas. The electrode 3 is positioned between two quartz lamps 6; the quartz lamp 6 is used for heating the test gas, and the test gas is heated by thermal radiation by turning on the quartz lamp 6. The pressure sensor 7 and the temperature sensor 8 are embedded on the side wall of the stainless steel shell 1, the pressure measuring end 71 of the pressure sensor 7 and the temperature measuring end 81 of the temperature sensor 8 are positioned in the accommodating space 101, and the electric connection end 82 of the temperature sensor 8 is positioned outside the accommodating space 101; the pressure sensor 7 is used for sensing the air pressure of the testing gas in the testing accommodating space 101, and the temperature sensor 8 is used for sensing the temperature of the testing gas in the testing accommodating space 101. The temperature control module 9 is electrically connected with the quartz lamp 6 and the electrical connection end 82 of the temperature sensor 8, the temperature control module 9 is used for controlling the on-off state of the quartz lamp 6, and adjusting the number of the quartz lamps 6 to be turned on or the brightness gear according to the temperature data of the test gas sensed by the temperature sensor 8 so as to control the temperature of the test gas within a set temperature range. The set temperature range can be adjusted according to the test requirements, and the application is not particularly limited.
According to the test cavity for the thermal state gas breakdown characteristic, the quartz lamp 6 is arranged in the accommodating space 101, the quartz lamp 6 is high-temperature resistant, easy to heat and high in heating efficiency, and the quartz lamp 6 is used for carrying out radiant heating on the test gas; the quartz lamp 6 is easy to heat and high in heating efficiency, so that the temperature of the test gas can be quickly heated to be within a set temperature range; since the quartz lamp 6 is resistant to high temperature, the life in a high temperature environment is long. The breakdown characteristic of the hot gas of thousands of degrees centigrade can be obtained through a test mode.
Fig. 2 is a schematic structural diagram of another thermal state gas breakdown characteristic testing chamber provided in the present application. As shown in fig. 2, the number of the quartz lamps 6 is 4, and the 4 quartz lamps 6 are arranged in two rows and distributed on both sides of the electrode 3. The electrode 3 can be located at the central position of the accommodating space 101, and the quartz lamps 6 are distributed around the electrode 3, so that the test gas can be uniformly heated, and the heat distribution of the test gas is uniform.
Fig. 3 is a schematic structural view of a testing chamber for thermal state gas breakdown characteristics according to another embodiment of the present invention, and fig. 4 is a top view of the quartz lamp arrangement shown in fig. 3. As shown in fig. 3 and 4, the quartz lamps 6 are arranged in a cylindrical shape, and the electrodes 3 are located in the cylinder formed by the arrangement of the quartz lamps 6. The quartz lamps 6 are arranged in a cylindrical shape, the electrodes 3 are arranged in the cylindrical shape, the efficiency of heating the test gas by the quartz lamps 6 can be improved, the more the number of the quartz lamps 6, the higher temperature range of the test gas can be heated, and the number and the arrangement mode of the quartz lamps 6 can be set according to actual conditions. The number and arrangement of the quartz lamps 6 shown in fig. 1 to 4 are merely illustrative, and the present application is not limited thereto.
Fig. 5 is a schematic structural diagram of another thermal state gas breakdown characteristic testing chamber provided in the present application. As shown in fig. 5, the stainless steel case 1 has a double-layer structure, and the stainless steel case 1 includes an inner case 103 and an outer case 104, and the inner case 103 and the outer case 104 of the double-layer structure form a hollow passage 102. The inner wall of the stainless steel housing 1 may also be provided with a ceramic layer (not shown in fig. 5). The ceramic layer can avoid ablation of the inner wall of the stainless steel shell by high temperature. The breakdown characteristic test chamber for the hot gas further comprises an external cooling liquid pump 10, the external cooling liquid pump 10 is communicated with the hollow channel 102, and a cooling liquid (not shown in fig. 5) is placed in the hollow channel 102. Because the test cavity of thermal state gas breakdown characteristic is at the in-process of test, and the gaseous temperature of test can reach thousands of degrees centigrade, and stainless steel casing 1's heat conductivity is better, can make stainless steel casing 1's surface temperature higher, causes personnel to scald easily or leads to other bodily injury. The cooling pump 10 can drive the circulation of the cooling liquid in the hollow channel 102 to cool the stainless steel shell 1 in real time, so that the temperature of the outer surface of the stainless steel shell 1 is close to the room temperature, and the injury of personnel is avoided. The thermal state gas breakdown characteristic testing cavity further comprises a vacuumizing module 11, the vacuumizing module 11 comprises a suction pipeline 111 and a suction pump 112 which are mutually communicated, and the suction pipeline 111 is communicated with the accommodating space 102. The vacuum module 11 can pump out the original gas in the accommodating space 102. The thermal state gas breakdown characteristic testing cavity further comprises an inflation pipeline 12, the inflation pipeline 12 is communicated with the accommodating space 102, and a gas valve 121 is arranged at the part, located outside the accommodating space 102, of the inflation pipeline 12. The test gas can be filled into the accommodating space 102 through the inflation pipe 12, and the gas valve 121 is used for controlling the on-off of the inflation pipe 12.
It should be noted that fig. 1 to 5 do not show the connection manner between all the quartz lamps 6, and they may be connected in series or in parallel, and the present application is not particularly limited and is specifically designed according to the needs.
The following description is made of a testing process of a thermal state gas breakdown characteristic testing cavity with reference to the attached drawings of the application:
the method comprises the following steps: the original gas in the accommodating space 102 is pumped out through the vacuumizing module 11, so that the accommodating space 102 is in a vacuum state;
step two: opening the gas valve 121 through the gas-filled pipe 12, and filling the test gas into the accommodating space 102; when the pressure sensor 7 senses that the air pressure of the test gas in the accommodating space 102 reaches a set range, the air valve 121 is closed, and the test gas is stopped from being filled into the accommodating space 102;
repeating the first step and the second step for 2-5 times; the purpose of this step is that the inner wall of the stainless steel shell 1 is cleaned by gas, and impurities in the accommodating space 102 are removed;
step three: the quartz lamp 6 is controlled to be started through the temperature control module 9, and the test gas is subjected to radiation heating; the quartz lamp 6 is turned off when the temperature sensor 8 senses that the temperature of the test gas in the accommodating space 102 reaches a set temperature; or a part of the quartz lamps 6 is turned off, and the remaining quartz lamps 6 are used to maintain the temperature of the test gas;
step four: the high-voltage electrode 4 applies voltage to the electrode 3 through a breakdown test, the applied voltage value is gradually increased, and the increase amplitude can be set according to specific requirements;
step five: when the voltage value applied by the high-voltage electrode 4 in the breakdown test is suddenly reduced, the test gas is broken down, and the maximum value before the sudden reduction of the applied voltage value is the breakdown characteristic value of the test gas in a set temperature range and a set air pressure range.
The set temperature range, the set gas pressure range, and the set distance between the static electrode 31 and the dynamic electrode 32 may be set according to specific requirements, and the breakdown characteristic value of the test gas may be different depending on the set temperature range, the set gas pressure range, and the set distance between the static electrode 31 and the dynamic electrode 32.
The application provides a test cavity of thermal state gas breakdown characteristic includes: the test device comprises a stainless steel shell, a test gas inlet, a test gas outlet and a test gas outlet, wherein the stainless steel shell forms an accommodating space, the test gas is accommodated in the accommodating space, and the stainless steel shell is grounded; the high-voltage insulating sleeve is embedded on the stainless steel shell, one end of the high-voltage insulating sleeve is positioned in the accommodating space, and the other end of the high-voltage insulating sleeve is positioned outside the accommodating space; the electrode is positioned in the accommodating space; the electrodes comprise a static electrode and a dynamic electrode which are oppositely arranged; the static electrode is fixedly connected with a breakdown test high-voltage electrode positioned outside the stainless steel shell through a high-voltage insulating sleeve; the moving electrode is fixedly connected with an external hand wheel positioned outside the accommodating space and is grounded; the at least two quartz lamps are positioned in the accommodating space; the pressure sensor is embedded on the stainless steel shell, and the pressure measuring end of the pressure sensor is positioned in the accommodating space; the temperature sensor is embedded on the stainless steel shell; the temperature measuring end of the temperature sensor is positioned in the accommodating space, and the electric connection end of the temperature sensor is positioned outside the accommodating space; and the temperature control module is electrically connected with the quartz lamp and the temperature measuring end of the temperature sensor.
The application provides a pair of test cavity of thermal state gas breakdown characteristic, applys voltage through the electrode to test gas, carries out radiant heating through the quartz lamp to test gas, can realize obtaining the breakdown characteristic of the thermal state gas of thousands of degrees centigrade through the mode of test.
The same and similar parts in the various embodiments in this specification may be referred to each other.
Claims (9)
1. A thermal state gas breakdown characteristic test chamber, comprising:
the device comprises a stainless steel shell (1), wherein the stainless steel shell (1) forms an accommodating space (101), test gas is accommodated in the accommodating space (101), and the stainless steel shell (1) is grounded;
the high-voltage insulating sleeve (2) is embedded on the stainless steel shell (1), one end (21) of the high-voltage insulating sleeve (2) is located in the accommodating space (101), and the other end (22) of the high-voltage insulating sleeve is located outside the accommodating space (101);
the electrode (3) is positioned in the accommodating space (101); the electrode (3) comprises a static electrode (31) and a dynamic electrode (32) which are oppositely arranged; the static electrode (31) is fixedly connected with a breakdown test high-voltage electrode (4) positioned outside the stainless steel shell (1) through the high-voltage insulating sleeve (2); the moving electrode (32) is fixedly connected with an external hand wheel (5) positioned outside the accommodating space (101), and the moving electrode (32) is grounded;
at least two quartz lamps (6), wherein the at least two quartz lamps (6) are positioned in the accommodating space (101);
the pressure sensor (7) is embedded in the stainless steel shell (1), and a pressure measuring end (71) of the pressure sensor (7) is positioned in the accommodating space (101);
the temperature sensor (8) is embedded in the stainless steel shell (1); the temperature measuring end (81) of the temperature sensor (8) is positioned in the accommodating space (101), and the electric connection end (82) of the temperature sensor (8) is positioned outside the accommodating space (101);
the temperature control module (9), the temperature control module (9) with quartz lamp (6) with temperature measurement end (81) electricity of temperature sensor (8) is connected.
2. The test chamber for the breakdown characteristics of a hot gas according to claim 1, characterized in that said electrode (3) is located between at least two of said quartz lamps (6).
3. The test chamber for the breakdown characteristic of hot gas according to claim 2, wherein the number of the quartz lamps (6) is at least 4, and at least 4 quartz lamps (6) are arranged in two rows distributed on two sides of the electrode (3).
4. The test chamber for the breakdown characteristic of hot gas according to claim 2, wherein the quartz lamps (6) are arranged in a cylindrical shape, and the electrode (3) is positioned in the cylinder formed by the arrangement of the quartz lamps (6).
5. The thermal state gas breakdown characteristic test chamber as claimed in claim 1, wherein the inner wall of the stainless steel shell (1) is provided with a ceramic layer.
6. The thermal state gas breakdown characteristic test chamber according to claim 1, wherein the stainless steel shell (1) is a double-layer structure, and the double-layer structure forms a hollow channel (102).
7. The thermal state gas breakdown testing chamber as claimed in claim 6, further comprising an external cooling liquid pump (10), wherein the external cooling liquid pump (10) is communicated with the hollow channel (102), and a cooling liquid is placed in the hollow channel (102).
8. The thermal state gas breakdown characteristic test chamber according to claim 1, further comprising a vacuum pumping module (11), wherein the vacuum pumping module (11) comprises a pumping line (111) and a pumping pump (112) which are communicated with each other, and the pumping line (111) is communicated with the accommodating space (102).
9. The thermal state gas breakdown testing cavity according to claim 1, further comprising an inflation pipeline (12), wherein the inflation pipeline (12) is communicated with the accommodating space (102), and a gas valve (121) is arranged at a part of the inflation pipeline (12) outside the accommodating space (102).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010114053.1A CN111273139A (en) | 2020-02-24 | 2020-02-24 | Testing cavity for thermal state gas breakdown characteristics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010114053.1A CN111273139A (en) | 2020-02-24 | 2020-02-24 | Testing cavity for thermal state gas breakdown characteristics |
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Application publication date: 20200612 |