CN113075516A - Low-temperature voltage withstand test method for radial insulator - Google Patents
Low-temperature voltage withstand test method for radial insulator Download PDFInfo
- Publication number
- CN113075516A CN113075516A CN202110497679.XA CN202110497679A CN113075516A CN 113075516 A CN113075516 A CN 113075516A CN 202110497679 A CN202110497679 A CN 202110497679A CN 113075516 A CN113075516 A CN 113075516A
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- Prior art keywords
- radial insulator
- insulator
- radial
- vacuum
- low
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- 239000012212 insulator Substances 0.000 title claims abstract description 47
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- SWQJXJOGLNCZEY-NJFSPNSNSA-N helium-6 atom Chemical compound [6He] SWQJXJOGLNCZEY-NJFSPNSNSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G01R31/1245—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 line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a low-temperature withstand voltage test method for a radial insulator, which comprises the steps of performing cold and hot impact, vacuum leak detection, direct-current voltage test and the like on the radial insulator. By adopting the testing method, the vacuum and voltage resistance of the radial insulator at low temperature can be effectively measured, and the manufacturing of a superconducting transmission line system is guaranteed.
Description
Technical Field
The invention relates to the technical field of fusion reactors, in particular to a low-temperature withstand voltage test method for a radial insulator in a superconducting transmission line system.
Background
With the development of fusion research, a magnet system for confining the configuration of plasma has put higher demands. The superconducting transmission line system is an electric and heat transmission channel of the low-temperature magnet system and the room-temperature power supply system. The radial insulator is used as a key part of a superconducting transmission line system, and the vacuum and voltage resistance performance at low temperature of the radial insulator is directly related to the main performance of the superconducting transmission line system, so that a low-temperature voltage resistance test method of the radial insulator is needed.
Disclosure of Invention
The invention aims to provide a low-temperature withstand voltage test method of a radial insulator.
A low-temperature withstand voltage test method for a radial insulator comprises the following steps:
(1) putting the radial insulator into and taking out liquid nitrogen to finish cold and hot impact;
(2) carrying out vacuum leakage detection on the radial insulator;
(3) welding a transition piece containing a conductor at one end of the radial insulator, welding a simulation corrugated pipe at the other end of the radial insulator, and performing vacuum leakage inspection on a formed welding line under 1.5 atmospheres, wherein the vacuum leakage rate is required to be less than 1 x 10 < -10 > Pa.m < 3 >/s;
(4) placing the radial insulator welded with the transition piece containing the conductor and the simulation corrugated pipe into a liquid nitrogen pool, electrically connecting a direct-current high-voltage anode on the transition piece containing the conductor, electrically connecting a grounding wire on the simulation corrugated pipe, and carrying out direct-current voltage test at normal temperature and low-temperature liquid nitrogen temperature, wherein the leakage current is lower than 30 muA under the requirement of 10KV current voltage;
(5) and judging whether the low-temperature withstand voltage tested by the radial insulator is qualified or not according to the vacuum leakage rate and the leakage current requirement.
By adopting the testing method, the vacuum and voltage resistance of the radial insulator at low temperature can be effectively measured, and the manufacturing of a superconducting transmission line system is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an apparatus used in steps (3) to (6) of the present invention;
FIG. 2 is a schematic structural view of an apparatus used in step (7) of the present invention;
FIG. 3 is a schematic structural view of an apparatus used in step (8) of the present invention;
FIG. 4 is a schematic structural view of an apparatus used in steps (9) to (10) of the present invention;
FIG. 5 is a schematic structural diagram of the apparatus used in step (11) of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
A low-temperature withstand voltage test method for a radial insulator comprises the following steps:
(1) cleaning the liquid nitrogen pool by using absolute ethyl alcohol to ensure that the surface does not contain dirt which influences the test, such as grease and the like;
(2) estimating the amount of introduced liquid nitrogen according to the volume and the material of the radial insulator;
(3) as shown in fig. 1, the radial insulator 1 is integrally placed in a liquid nitrogen pool 2;
(4) injecting liquid nitrogen 3 until the radial insulator 1 is submerged below the surface of liquid nitrogen, or submerging a welding line to be tested on the radial insulator below the surface of the liquid nitrogen, and supplementing the liquid nitrogen at any time according to the consumption of a liquid nitrogen pool;
(5) stopping injecting liquid nitrogen when no bubbles exist on the surface of the radial insulator 1, and standing for 2 minutes;
(6) the radial insulator 1 is lifted out from the liquid nitrogen pool 2;
(7) and spraying and detecting: referring to fig. 2, a radial insulator 1 is placed on a vacuum leakage detection device 4, a sealing surface is coated with vacuum grease, the upper end of the radial insulator 1 is sealed by a rubber plug 5, helium gas 6 is sprayed on the sealing surface, vacuum pumping is performed for leakage detection, and the vacuum leakage rate is required to be less than 1 x 10 < -10 > Pa.m < 3 >/s;
(8) and package inspection: referring to fig. 3, a radial insulator 1 is placed on a vacuum leak detection device 4, a sealing surface is coated with vacuum grease, the upper end of the radial insulator 1 is sealed with a rubber plug 5, the sealing surface of the radial insulator is wrapped with an aluminum foil or plastic bag 7, helium 6 is filled into the aluminum foil or plastic bag 7, the air is continuously inflated for 20 minutes, the vacuum leak detection is carried out by vacuumizing, and the vacuum leak rate is required to be less than 1 x 10-10 Pa.m 3/s;
(9) referring to fig. 4, welding a transition piece (containing a conductor) 8 at one end of a radial insulator 1, and performing vacuum leakage inspection on a formed welding line under 1.5 atmospheric pressures, wherein the vacuum leakage rate is required to be less than 1 x 10 < -10 > Pa.m < 3 >/s;
(10) welding a simulation corrugated pipe 9 (outer diameter) at the other end of the radial insulator 1, and performing vacuum leakage inspection on a formed welding line under 1.5 atmospheres, wherein the vacuum leakage rate is required to be less than 1 x 10 < -10 > Pa.m < 3 >/s;
(11) referring to fig. 5, a radial insulator 1 welded with a transition piece (including a conductor) 8 and a simulation corrugated pipe 9 is placed in a liquid nitrogen pool 2, a direct-current high-voltage anode 10 is electrically connected to the transition piece (including the conductor) 8, a grounding wire 11 is electrically connected to the simulation corrugated pipe 9, and a direct-current voltage test is performed at normal temperature and low temperature of liquid nitrogen, wherein the leakage current is lower than 30 mua under the requirement of 10KV current voltage;
(12) and judging whether the low-temperature withstand voltage tested by the radial insulator is qualified or not according to the vacuum leakage rate and the leakage current requirement.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (2)
1. A low-temperature withstand voltage test method of a radial insulator is characterized by comprising the following steps: the method comprises the following steps:
(1) putting the radial insulator into and taking out liquid nitrogen to finish cold and hot impact;
(2) carrying out vacuum leakage detection on the radial insulator;
(3) welding a transition piece containing a conductor at one end of the radial insulator, welding a simulation corrugated pipe at the other end of the radial insulator, and performing vacuum leakage inspection on a formed welding line under 1.5 atmospheres, wherein the vacuum leakage rate is required to be less than 1 x 10 < -10 > Pa.m < 3 >/s;
(4) placing the radial insulator welded with the transition piece containing the conductor and the simulation corrugated pipe into a liquid nitrogen pool, electrically connecting a direct-current high-voltage anode on the transition piece containing the conductor, electrically connecting a grounding wire on the simulation corrugated pipe, and carrying out direct-current voltage test at normal temperature and low-temperature liquid nitrogen temperature, wherein the leakage current is lower than 30 muA under the requirement of 10KV current voltage;
(5) and judging whether the low-temperature withstand voltage tested by the radial insulator is qualified or not according to the vacuum leakage rate and the leakage current requirement.
2. The low-temperature withstand voltage test method of the radial insulator according to claim 1, characterized in that: the step (2) comprises the steps of,
spraying and detecting: placing the radial insulator on a vacuum leak detection device, smearing a sealing surface with vacuum grease, sealing the upper end of the radial insulator with a rubber plug, spraying helium on the sealing surface, vacuumizing and detecting leak, wherein the vacuum leak rate is required to be less than 1 x 10 < -10 > Pa.m < 3 >/s;
package inspection: and (2) placing the radial insulator on a vacuum leakage detection device, smearing vacuum grease on a sealing surface, sealing the upper end of the radial insulator by using a rubber plug, wrapping the sealing surface of the radial insulator by using an aluminum foil or plastic bag, filling helium into the aluminum foil or plastic bag, continuously inflating for 20 minutes, vacuumizing and detecting leakage, wherein the vacuum leakage rate is required to be less than 1 x 10-10 Pa.m 3/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110497679.XA CN113075516A (en) | 2021-05-08 | 2021-05-08 | Low-temperature voltage withstand test method for radial insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110497679.XA CN113075516A (en) | 2021-05-08 | 2021-05-08 | Low-temperature voltage withstand test method for radial insulator |
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| Publication Number | Publication Date |
|---|---|
| CN113075516A true CN113075516A (en) | 2021-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110497679.XA Pending CN113075516A (en) | 2021-05-08 | 2021-05-08 | Low-temperature voltage withstand test method for radial insulator |
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| Country | Link |
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| CN (1) | CN113075516A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323525A (en) * | 2011-06-16 | 2012-01-18 | 中国电力科学研究院 | The above voltage withstand class lead wire insulation of a kind of 35kV performance test method of testing |
| CN102426324A (en) * | 2011-08-24 | 2012-04-25 | 中国科学院等离子体物理研究所 | Tester for testing insulation low-temperature performance of superconducting electrical component |
-
2021
- 2021-05-08 CN CN202110497679.XA patent/CN113075516A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323525A (en) * | 2011-06-16 | 2012-01-18 | 中国电力科学研究院 | The above voltage withstand class lead wire insulation of a kind of 35kV performance test method of testing |
| CN102426324A (en) * | 2011-08-24 | 2012-04-25 | 中国科学院等离子体物理研究所 | Tester for testing insulation low-temperature performance of superconducting electrical component |
Non-Patent Citations (3)
| Title |
|---|
| 于敏;武玉;刘华军;任志斌;潘皖江;: "低温高强度复合材料绝缘子的研制和性能测试", 低温与超导, no. 09, pages 13 - 16 * |
| 张健;李茂松;黄大志;: "一种适用于微电子器件的密封漏气分析方法", 微电子学, no. 02, pages 271 - 274 * |
| 杨长春;潘皖江;: "ITER环氧基复合材料轴向绝缘子的低温气密性能研究", 真空科学与技术学报, no. 12, pages 1405 - 1409 * |
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