CN109494651B - Composite insulation high-temperature wall bushing device - Google Patents
Composite insulation high-temperature wall bushing device Download PDFInfo
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- CN109494651B CN109494651B CN201811165553.7A CN201811165553A CN109494651B CN 109494651 B CN109494651 B CN 109494651B CN 201811165553 A CN201811165553 A CN 201811165553A CN 109494651 B CN109494651 B CN 109494651B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
- H02G3/0412—Heat or fire protective means
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Abstract
The utility model provides a composite insulation high temperature wall bushing apparatus, includes the heat preservation wall, outer insulating subassembly, gaseous pressure equalizing device, inlayer insulating subassembly, the energy storage body, its essential is: the outer insulating component is a quartz tube sealing sleeve structure with a gap, an air inlet flange communicated with a sealing cavity formed by the gap is welded on the outer surface of the middle part of the quartz welding pipe fitting, and a metal flange is further arranged on the surface of the quartz welding pipe fitting which is symmetrical with the air inlet flange; the gas pressure equalizing device arranged outside the heat preservation wall is communicated with the air inlet flange; the inner layer insulation assembly is as follows: the length of the cylindrical rod piece is the same as that of the electrode conductive rod section, a heat-resistant stainless steel pipe with an electrode is arranged in the cylindrical rod piece, and a high-temperature-resistant mica coiled material is glued and wound on the cylindrical rod piece; and fixing a metal flange at the opening of the heat-insulating wall for leading out the high-voltage electrode, installing an outer insulating component, inserting the inner insulating component into a through hole of the quartz fusion pipe fitting, arranging a rain-proof porcelain sleeve on the outer side of the heat-insulating wall, and connecting a power supply with a heating element in the energy storage body through an electrode conducting rod.
Description
Technical Field
The invention relates to the technical field of power supply access devices with high voltage levels in high-temperature environments, in particular to a composite insulating high-temperature wall bushing device working at a voltage level of 66kV to 500kV in a temperature of 700 ℃.
Background
The applicant applies for a high-voltage high-temperature-resistant wall bushing to the national intellectual property office in 2016, and makes 80 high-voltage high-temperature-resistant wall bushings with outer quartz glass tubes and built-in mica insulation coiled material insulation tubes, and after Shen Beihu national high-voltage product detection institutions are authenticated to be qualified, 16 devices in total with 66kV voltage level high-temperature solid electric heating energy storage furnaces are installed in northeast Dandong gold mountain power plants, soldier mountain power plants, vinca fourth thermal power plants and Yichun power plants. The feasibility of the technology is fully demonstrated by stable operation of 80 high-voltage high-temperature-resistant wall bushings for more than 1 year. In the manufacturing and using process, the high-voltage high-temperature-resistant wall bushing is observed, a weak section which is easy to break down in voltage is arranged in a range of a distance of half meters passing through the heat-insulating wall section and leaving the inside and outside of the heat-insulating wall, in order to meet the insulation requirement of 66kV voltage class under a high-temperature environment, a quartz glass tube with the outer diameter of 230 mm, the length of 3200 mm and the wall thickness of 7 mm is selected as the shell of the wall bushing, the difficulty of manufacturing the high-voltage high-temperature-resistant wall bushing with the tube is high, particularly the high-voltage high-temperature-resistant wall bushing with the voltage class of 110kV is high, the difficulty of processing the quartz tube with the length of 3500 mm or more is higher, and the power supply access cost of the high-temperature solid electric heating energy storage furnace with the voltage class of 110kV or more is increased. If the main contradiction is grasped, the breakdown voltage protection level in the range of half a meter before and after passing through the heat preservation wall is improved by using an insulating structure, then the high-voltage high-temperature-resistant through-wall electrode is arranged, and the outer layer can be formed without a feldspar glass tube.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the high-temperature wall bushing device with the composite insulation structure with the voltage level of 66kV to 500kV, which can reduce the production cost of electric heating energy storage equipment and increase the convenience and reliability of high-voltage power access equipment in a high-temperature environment.
The technical scheme adopted by the invention is as follows: the utility model provides a composite insulation high temperature wall bushing apparatus, it is including the heat preservation wall, outer insulating element, gaseous pressure equalizing device, inlayer insulating element, rain-proof porcelain bushing, energy storage body, its characterized in that: the outer insulating component is characterized in that two quartz tube end faces with the same length and wall thickness and a sleeving gap of 5-50 mm are welded to form a quartz welding tube fitting with the sleeving gap as a closed cavity, the outer surface of the middle part of the quartz welding tube fitting in the length direction is welded with an air inlet flange which is made of the same material and communicated with the closed cavity formed by the sleeving gap, and the surface of the quartz welding tube fitting which is symmetrical with the air inlet flange is coaxially provided with a metal flange; the gas pressure equalizing device is arranged outside the heat preservation wall and communicated with the air inlet flange, and is a tank body for storing insulating gas and balancing and adjusting the pressure of working gas in the closed cavity; the inner layer insulation assembly is as follows: the length of the mica tube is the same as that of the electrode conductive rod section, a heat-resistant stainless steel tube with an electrode is arranged in the mica tube, and a high-temperature-resistant mica coiled material is glued and wound on the mica tube to form a cylindrical pipe fitting; and fixing a metal flange at the opening of the heat-insulating wall for leading out the high-voltage electrode, installing an outer insulating component, inserting the inner insulating component into a through hole of the quartz fusion pipe fitting, installing a rain-proof porcelain sleeve on the outer side of the heat-insulating wall, and connecting a power supply with a resistance heating element in the energy storage body through an electrode conducting rod.
In the technical scheme, the energy storage body is a solid refractory material block with a resistance heating element, and the solid refractory material block is arranged in the heat preservation wall.
In the above technical solution, the insulating gas is sulfur hexafluoride gas or nitrogen gas.
In the above technical scheme, the quartz welding pipe fitting means that the quartz glass umbrella skirt for increasing the creepage distance is welded on the outer surface.
In the technical scheme, the electrode is a copper bar with wiring leading-out sections arranged at two ends of the electrode conducting rod section.
In the above technical scheme, the inner insulation component is formed by sleeving an electrode, a stainless steel tube, a mica tube or an outer short quartz tube.
The beneficial effects of the invention are as follows: according to the composite insulating high-temperature wall bushing device, the length of the quartz welding pipe fitting selected for the 110kV working voltage is smaller than 2000 mm, the production cost of a quartz glass pipe is reduced, and the safety and convenience of installation are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an assembly schematic diagram of a composite insulation high temperature wall bushing apparatus in an embodiment of the present invention;
FIG. 2 is a schematic view of an assembly of an outer insulation assembly according to an embodiment of the present invention;
fig. 3 is an assembly schematic diagram of an inner insulation assembly according to an embodiment of the present invention.
The numbers in the figures are illustrated as follows: the heat insulation wall comprises a heat insulation wall body 1, a rain-proof porcelain sleeve 2, a metal flange 3, a quartz welding pipe fitting 4, a mica pipe 5, a stainless steel pipe 6, an air inlet flange 7, an air pipe 8, a gas pressure equalizer 9, a sleeve gap 10, an electrode conducting rod section 11, a connecting line section 12, an umbrella skirt 13, an energy storage body 14, a conducting belt 15, insulating gas 16, a welding end 17, an outer insulating component 18 and an inner insulating component 19.
Description of the embodiments
The foregoing objects, features, and advantages of the invention will be more readily apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings 1 and detailed description.
Examples
The composite insulation high-temperature wall bushing device adopted in the embodiment comprises a heat preservation wall 1, a rain-proof porcelain sleeve 2, a metal flange 3, a quartz welding pipe fitting 4, a mica pipe 5, a stainless steel pipe 6, an air inlet flange 7, an air pipe 8 filled with insulation gas, a gas pressure equalizer 9, a sleeving gap 10, an electrode conducting rod section 11, a wiring section 12, an umbrella skirt 13, an energy storage body 14, a conducting belt 15, insulation gas 16, a welding end 17, an outer insulation component 18 and an inner insulation component 19. The concrete structure is as follows: the outer insulating assembly is characterized in that two quartz tube end faces with the same length and the same wall thickness and a sleeving gap 10 of 5-50 mm are welded to form a quartz welding tube 4 with the sleeving gap being a closed cavity, the outer surface of the middle part of the length direction of the quartz welding tube is welded with an air inlet flange which is made of the same material and communicated with the closed cavity formed by the sleeving gap 10, the air inlet flange 7 is a symmetrical quartz welding tube 4, the surface of the quartz welding tube is coaxially provided with a metal flange 3, the quartz welding tube is a weak section which is easy to generate voltage breakdown in a distance range of half meters away from the inner side and the outer side of a heat insulation wall, and the creepage distance of the outer surface welding quartz glass umbrella skirt 13 is increased; the gas pressure equalizer 9 arranged outside the heat preservation wall 1 is communicated with the air inlet flange 7, and the gas pressure equalizer 9 is a tank body for storing insulating gas 16 and balancing and adjusting the pressure of working gas in the closed cavity; the inner insulation assembly 19 is: the length of the mica tube is the same as that of the electrode conducting rod section 11, a heat-resistant stainless steel tube 6 with an electrode is arranged in the mica tube, and a mica tube 5 with a cylindrical rod piece of high-temperature-resistant mica coiled material is glued and wound; the metal flange 3 is fixed at the opening of the heat-insulating wall for leading out the high-voltage electrode, the outer insulating component 18 is installed, the inner insulating component 19 is inserted into the through hole of the quartz fusion pipe fitting 4, the rainproof porcelain sleeve 2 is also installed on the outer side of the heat-insulating wall 1, and the conductive belt 15 connected with the electrode connecting line segment 12 on the inner side of the heat-insulating wall 1 is connected with the resistance heating element in the energy storage body 14.
Fixing a quartz fusion pipe fitting 4 with a metal flange 3 on the heat preservation wall 1, and keeping the length of the protruding part of the quartz fusion pipe fitting 4 on the inner side and the outer side of the heat preservation wall 1 consistent and vertical to the wall surface; an insulating gas channel between the gas inlet flange 7 and the gas pressure equalizer 9 is connected by a gas pipe 8, so that a sleeving gap 10 in the quartz fusion pipe fitting 4 is filled with insulating gas 16; the invention has the power transmission working condition by installing the inner insulating component in the through hole of the quartz fusion pipe fitting 4, installing the waterproof porcelain sleeve 2 on the outer side of the heat preservation wall, and connecting the conductive belt 15 connected with the electrode connecting line segment 12 on the inner side of the heat preservation wall 1 with the resistance heating element in the energy storage body 14.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a composite insulation high temperature wall bushing apparatus, it is including the heat preservation wall, outer insulating element, gaseous pressure equalizing device, inlayer insulating element, rain-proof porcelain bushing, energy storage body, its characterized in that: the outer insulating component is characterized in that two quartz tube end faces with the same length and wall thickness and a sleeving gap of 5-50 mm are welded to form a quartz welding tube fitting with the sleeving gap as a closed cavity, the outer surface of the middle part of the quartz welding tube fitting in the length direction is welded with an air inlet flange which is made of the same material and communicated with the closed cavity formed by the sleeving gap, and the surface of the quartz welding tube fitting which is symmetrical with the air inlet flange is coaxially provided with a metal flange; the gas pressure equalizing device is arranged outside the heat preservation wall and communicated with the air inlet flange, and is a tank body for storing insulating gas and balancing and adjusting the pressure of working gas in the closed cavity; the inner layer insulation assembly is as follows: the length of the mica tube is the same as that of the electrode conductive rod section, a heat-resistant stainless steel tube with an electrode is arranged in the mica tube, and a high-temperature-resistant mica coiled material is glued and wound on the mica tube to form a cylindrical pipe fitting; and fixing a metal flange at the opening of the heat-insulating wall for leading out the high-voltage electrode, installing an outer insulating component, inserting the inner insulating component into a through hole of the quartz fusion pipe fitting, installing a rain-proof porcelain sleeve on the outer side of the heat-insulating wall, and connecting a power supply with a resistance heating element in the energy storage body through an electrode conducting rod section.
2. The composite insulation high temperature wall bushing apparatus of claim 1, wherein: the energy storage body is a solid refractory material block with a resistance heating element arranged in the heat preservation wall.
3. The composite insulation high temperature wall bushing apparatus of claim 1, wherein: the insulating gas is sulfur hexafluoride gas or nitrogen gas.
4. The composite insulation high temperature wall bushing apparatus of claim 1, wherein: the quartz welding pipe fitting is characterized in that a quartz glass umbrella skirt for increasing the creepage distance is welded on the outer surface of the quartz welding pipe fitting.
5. The composite insulation high temperature wall bushing apparatus of claim 1, wherein: the electrode is a copper bar with wiring leading-out sections arranged at two ends of the electrode conducting rod section.
6. The composite insulation high temperature wall bushing apparatus of claim 1, wherein: the inner insulating component is formed by sleeving an electrode, a stainless steel tube, a mica tube or an outer short quartz tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165553.7A CN109494651B (en) | 2018-10-08 | 2018-10-08 | Composite insulation high-temperature wall bushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811165553.7A CN109494651B (en) | 2018-10-08 | 2018-10-08 | Composite insulation high-temperature wall bushing device |
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| Publication Number | Publication Date |
|---|---|
| CN109494651A CN109494651A (en) | 2019-03-19 |
| CN109494651B true CN109494651B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811165553.7A Active CN109494651B (en) | 2018-10-08 | 2018-10-08 | Composite insulation high-temperature wall bushing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113292023A (en) * | 2021-07-27 | 2021-08-24 | 徐州海伦哲特种车辆有限公司 | All-weather adaptive insulating aerial working platform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0963141A2 (en) * | 1998-06-05 | 1999-12-08 | Leybold Systems GmbH | Device for plasma generation |
| CN203678538U (en) * | 2013-12-26 | 2014-07-02 | 武汉龙净环保科技有限公司 | Pressure-bearing insulator of electric dust collector |
| CN107449995A (en) * | 2017-07-06 | 2017-12-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of direct-current wall bushing SF6The system that electric discharge produces solid product |
| CN207254555U (en) * | 2017-12-13 | 2018-04-20 | 广东居峰环保科技有限公司 | A kind of high pressure inlet wire seal of wet electrostatic demisting/dirt device |
| CN209200604U (en) * | 2018-10-08 | 2019-08-02 | 沈阳市杰电器有限公司 | Compound inslation high temperature wall bushing device |
-
2018
- 2018-10-08 CN CN201811165553.7A patent/CN109494651B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0963141A2 (en) * | 1998-06-05 | 1999-12-08 | Leybold Systems GmbH | Device for plasma generation |
| CN203678538U (en) * | 2013-12-26 | 2014-07-02 | 武汉龙净环保科技有限公司 | Pressure-bearing insulator of electric dust collector |
| CN107449995A (en) * | 2017-07-06 | 2017-12-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of direct-current wall bushing SF6The system that electric discharge produces solid product |
| CN207254555U (en) * | 2017-12-13 | 2018-04-20 | 广东居峰环保科技有限公司 | A kind of high pressure inlet wire seal of wet electrostatic demisting/dirt device |
| CN209200604U (en) * | 2018-10-08 | 2019-08-02 | 沈阳市杰电器有限公司 | Compound inslation high temperature wall bushing device |
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| CN109494651A (en) | 2019-03-19 |
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