CN101577172B - Stress cone type dry sleeve of transformer - Google Patents
Stress cone type dry sleeve of transformer Download PDFInfo
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- CN101577172B CN101577172B CN2008100255537A CN200810025553A CN101577172B CN 101577172 B CN101577172 B CN 101577172B CN 2008100255537 A CN2008100255537 A CN 2008100255537A CN 200810025553 A CN200810025553 A CN 200810025553A CN 101577172 B CN101577172 B CN 101577172B
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- stress cone
- electric field
- full skirt
- insulator
- type dry
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Abstract
The invention relates to a high-pressure or ultra-high pressure transformer part, in particular to a stress type dry sleeve of a transformer, comprising an umbrella skirt (3), a lower flange (6), a conductive rod (1), an electric field control element (5) and an insulator (4). The electric field control element (5) is sleeved outside the conductive rod (1), and the umbrella skirt (3) is arranged outside the electric field control element (5); the insulator (4) is arranged between the umbrella skirt (3) and the conductive rod (1), and the upper end of the conductive rod (1) extends out of the upper end of the umbrella skirt (3); the insulator (4) is a solid insulator, and the electric field control element (5) is a bidirectional stress cone which is formed by connecting two unidirectional stress cones and is in an integral structure by using the bottoms of the two unidirectional stress cones as a joint surface to be combined into a whole. The invention has the advantages of simple structure, low cost, light weight, good safety, convenient manufacture and mounting, good product quality and wide range of application.
Description
Technical field
The present invention relates to a kind of high pressure, EHV transformer parts, particularly a kind of stress cone type dry sleeve of transformer.
Background technology
At present, what the oil-immersed power transformer sleeve pipe generally adopted is porcelain bushing, and porcelain bushing is outward a full skirt, and the wrapped electric capacity awl of inner conductor is full of insulant in the sleeve pipe then, and insulant is a fluid insulation oil.Mainly there is following defective in this bushing shell for transformer: (1) is when system breaks down, insulating oil heating expansion in the porcelain bushing inner chamber can set off an explosion, hurt sb.'s feelings easily and damage miscellaneous equipment, the insulating oil formation fire that burns easily, even the oil firing that causes transformer inside explodes, make the paralysis of whole electric substation, the accident infringement is big especially; (2) irritated fluid insulation oil in the porcelain bushing, leaked, must use seal for preventing insulating oil, heating when insulating oil is owing to the transformer operation simultaneously makes seal easier to be aging, and useful life is short, easy seepage oil, insulating oil is also apt to deteriorate, and this all greatly reduces the electric property of equipment; (3) the electric field controls element is a requisite important spare part in the porcelain bushing, porcelain bushing internal electric field control element generally all adopts electric capacity to bore and controls the sleeve pipe electric field, adopt the sleeve structure (as shown in Figure 6) of electric capacity awl, comprise conducting rod 1, full skirt 3, insulant 4, electric field controls element 5, lower flange 6, seal 8, sleeve pipe 9, the electric capacity awl is to form through multi-lay winding insulating paper 4 ' and metallic film 5 ' in conducting rod 1 outside, electric capacity awl complex manufacturing technology, the skilled worker is required height, deviation by artificial generation is big, and require high especially to production environment, dust in the environment and moisture all can reduce the insulation property of product greatly, bring potential safety hazard to product, product quality is difficult for guaranteeing; At present, also has a kind of electric field controls element pure stress awl, pure stress wimble structure (as Fig. 3, shown in Figure 5), the pure stress awl comprises inner wire 5-1 ' and insulator 5-2 ', inner wire 5-1 ' is arranged at insulator 5-2 ' inside, and the pure stress wimble structure is simple, and fabrication and installation are easy, but the pure stress awl scope of application is narrow, is mainly used in cable termination.People are seeking a kind of new casing that can remedy above-mentioned defective always, but this problem long-term indeterminable technical barrier that always is people.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, cost is low, manufacturing is easy for installation, fail safe is good, the stress cone type dry sleeve of transformer of good product performance.
Realize that the above-mentioned purpose technical scheme is: a kind of stress cone type dry sleeve of transformer, comprise full skirt, lower flange, conducting rod, the electric field controls element, insulant, conducting rod is with the electric field controls element outward, the electric field controls element is outside equipped with full skirt, be provided with insulant between full skirt and the conducting rod, stretch out from the upper end of full skirt the upper end of conducting rod, described insulant is a solid insulator, described electric field controls element is a bidirectional stress cone, bidirectional stress cone is formed by connecting by two pure stress awls, and be to be the overall structure that faying face is combined as a whole with these two pure stresses awl bottom surfaces, comprise inner wire and insulator, inner wire is arranged at insulator inside.
Further, described full skirt is the silicon rubber full skirt, and silicon rubber full skirt and solid insulator join.
Further, described solid insulator is an epoxy resin.
Further, described inner wire is conductor material or semi-conducting material.
Further, described inner wire is conductor material aluminium or copper material.
Further, described inner wire is semi-conducting material silicon rubber or ethylene propylene diene rubber.
After adopting technique scheme, have a lot of benefits: (1) is simple in structure, cost is low, Product Safety is good.The present invention adopts solid insulator to replace fluid insulation oil, is convenient to transportation and installation; When system breaks down, be difficult for setting off an explosion and fire, the accident infringement is little, and fail safe is good; Seal is difficult for aging, long service life, and phenomenons such as seepage oil, deterioration of oil can not take place, and improved the electric property of equipment greatly, good product quality, performance is good; The present invention also can not use seal; (2) simple in structure, cost is low, manufacturing is easy for installation, good product quality.The bidirectional stress cone design that the present invention adopts is ingenious, and bidirectional stress cone is formed by connecting by two pure stress awls, and is to be the overall structure that faying face is combined as a whole with these two pure stress awl bottom surfaces, and is simple in structure.The shaping that is prefabricated in the factory during manufacturing, the on-the-spot installation do not need field fabrication, thereby makes and install very conveniently, and installation quality is reliable; And do not need to resemble the so complicated winding of electric capacity awl, greatly reduce the unstable product quality that causes because of human factor, with low cost, good product quality; (3) applied widely.The bidirectional stress cone that the present invention adopts is applicable to the occasion that the electric capacity awl is suitable for, be the desirable substitute products of electric capacity awl, and the occasion bidirectional stress cones such as solid insulator that the electric capacity awl can not be suitable for also can be suitable for, bidirectional stress cone does not have the electric capacity awl to require height to the requirement of production environment in use yet, thereby its scope of application is wider.The invention solves the long-term indeterminable technical barrier of people.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of electric field controls element spare 5 bidirectional stress cones of the present invention;
Fig. 3 is the structural representation of existing electric field controls element pure stress awl.
Fig. 4 is the section outer contour shape schematic diagram of inner wire spare 5-1 among Fig. 2;
Fig. 5 is the section outer contour shape schematic diagram of inner wire spare 5-1 ' among Fig. 3.
Fig. 6 is the structural representation of electric capacity bevel-type sleeve pipe in the prior art.
Embodiment
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Embodiment one
As Fig. 1, Fig. 2, shown in Figure 4, a kind of stress cone type dry sleeve of transformer, comprise full skirt 3, upper flange 2, lower flange 6, conducting rod 1, electric field controls element 5, insulant 4, grading ring 7, full skirt 3 tops are set with upper flange 2, full skirt 3 bottoms are set with lower flange 6, the conducting rod 1 outer electric field controls element 5 that is with, electric field controls element 5 is outside equipped with full skirt 3, be provided with insulant 4 between full skirt 3 and the conducting rod 1, be provided with insulant 4 between full skirt 3 and the electric field controls element 5, insulant 4 is the epoxy resin solid insulator, grading ring 7 is arranged on the lower end of full skirt 3, and is connected with conducting rod 1 lower end, and stretch out from the upper end of full skirt 3 upper end of conducting rod 1, and by the upper end sealing of seal 8 with full skirt 3, described seal 8 is a sealing ring.Pure stress is bored its structural shape (as Fig. 3, shown in Figure 5), and the pure stress awl is prior art.The electric field controls element 5 that present embodiment adopts is a bidirectional stress cone, comprise inner wire 5-1 and insulator 5-2, inner wire 5-1 is arranged at insulator 5-2 inside, described bidirectional stress cone is made up of two identical pure stresses awls, and is that to bore bottom surface a faces with these two identical pure stresses be the overall structure that symmetrical faying face is combined as a whole.Inner wire 5-1 section outer contour is made up of a part of straight line and a part of curve, and curve is the hyperbola by many circular arc simulations.Described inner wire 5-1 adopts the conductor material aluminium to make.Described full skirt 3 is the silicon rubber full skirt, and silicon rubber full skirt and epoxy resin solid insulator join, and the silicon rubber full skirt is compounded in epoxy resin solid insulator outside.Present embodiment is changed traditional bushing shell for transformer structure of the prior art, do not need sleeve pipe, adopt the silicon rubber full skirt to replace traditional porcelain bushing, adopt silicon rubber full skirt and epoxy resin solid insulator to join, promptly do not have sleeve pipe between silicon rubber full skirt and the epoxy resin solid insulator.Novel structure, simple is convenient to transportation and installation; It is epoxy resin that present embodiment adopts solid insulator, and epoxy resin has self-extinguishment, can not cause fire, and fail safe is better; Need not sleeve pipe, simplified production technology widely, saved production cost.
Embodiment two
As Fig. 1, Fig. 2, shown in Figure 4, basic identical with embodiment one, different is that described inner wire 5-1 adopts the conductor material copper material to make.
Embodiment three
As Fig. 1, Fig. 2, shown in Figure 4, basic identical with embodiment one, different is that described inner wire 5-1 adopts semi-conducting material silicon rubber to make.
Embodiment four
As Fig. 1, Fig. 2, shown in Figure 4, basic identical with embodiment one, different is that described inner wire 5-1 adopts the semi-conducting material ethylene propylene diene rubber to make.
In addition to the implementation, inner wire 5-1 of the present invention also can adopt other conductor or semi-conducting material manufacturing; Two pure stress awls that connect into bidirectional stress cone can be identical as above-mentioned embodiment, also can be inequality; The present invention also can adopt porcelain shell for transformer pipe of the prior art, and porcelain bushing is outward a umbrella skirt construction; Solid insulator also can adopt other solid insulator except that epoxy resin.
The invention is not restricted to the foregoing description, the technical scheme that all employings are equal to replacement or equivalence replacement formation all belongs to the scope of protection of present invention.
Claims (6)
1. stress cone type dry sleeve of transformer, comprise full skirt (3), lower flange (6), conducting rod (1), electric field controls element (5), insulant (4), the outer electric field controls element (5) that is with of conducting rod (1), electric field controls element (5) is outside equipped with full skirt (3), be provided with insulant (4) between full skirt (3) and the conducting rod (1), stretch out from the upper end of full skirt (3) upper end of conducting rod (1), it is characterized in that: described insulant (4) is a solid insulator, described electric field controls element (5) is a bidirectional stress cone, bidirectional stress cone is formed by connecting by two pure stress awls, and be to be the overall structure that faying face is combined as a whole with these two pure stresses awl bottom surfaces, comprise inner wire (5-1) and insulator (5-2), inner wire (5-1) is arranged at insulator (5-2) inside.
2. stress cone type dry sleeve of transformer according to claim 1 is characterized in that: described full skirt (3) is the silicon rubber full skirt, and silicon rubber full skirt and solid insulator join.
3. stress cone type dry sleeve of transformer according to claim 1 is characterized in that: described solid insulator is an epoxy resin.
4. stress cone type dry sleeve of transformer according to claim 1 is characterized in that: described inner wire (5-1) is conductor material or semi-conducting material.
5. stress cone type dry sleeve of transformer according to claim 4 is characterized in that: described inner wire (5-1) is conductor material aluminium or copper material.
6. stress cone type dry sleeve of transformer according to claim 4 is characterized in that: described inner wire (1) is semi-conducting material silicon rubber or ethylene propylene diene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100255537A CN101577172B (en) | 2008-05-08 | 2008-05-08 | Stress cone type dry sleeve of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100255537A CN101577172B (en) | 2008-05-08 | 2008-05-08 | Stress cone type dry sleeve of transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101577172A CN101577172A (en) | 2009-11-11 |
| CN101577172B true CN101577172B (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100255537A Active CN101577172B (en) | 2008-05-08 | 2008-05-08 | Stress cone type dry sleeve of transformer |
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| Country | Link |
|---|---|
| CN (1) | CN101577172B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254669A (en) * | 2011-01-19 | 2011-11-23 | 江苏宝亨新电气有限公司 | Anti-oil leakage dry transformer bushing |
| CN110197763A (en) * | 2019-05-14 | 2019-09-03 | 恒源利通电气大厂有限公司 | A kind of outdoor three-phase integral current mutual inductor with stress cone and transistor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574533A (en) * | 2003-06-19 | 2005-02-02 | 古河电气工业株式会社 | Cold-shrinkable type rubber insulation sleeve and method of manufacturing |
| CN201018250Y (en) * | 2006-03-21 | 2008-02-06 | 深圳市沃尔核材股份有限公司 | Novel cable accessory |
| CN201233801Y (en) * | 2008-05-08 | 2009-05-06 | 江苏安靠超高压电缆附件有限公司 | Dry sheath for stress cone type transformer |
-
2008
- 2008-05-08 CN CN2008100255537A patent/CN101577172B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574533A (en) * | 2003-06-19 | 2005-02-02 | 古河电气工业株式会社 | Cold-shrinkable type rubber insulation sleeve and method of manufacturing |
| CN201018250Y (en) * | 2006-03-21 | 2008-02-06 | 深圳市沃尔核材股份有限公司 | Novel cable accessory |
| CN201233801Y (en) * | 2008-05-08 | 2009-05-06 | 江苏安靠超高压电缆附件有限公司 | Dry sheath for stress cone type transformer |
Non-Patent Citations (1)
| Title |
|---|
| JP平11-332081A 1999.11.30 |
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| Publication number | Publication date |
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| CN101577172A (en) | 2009-11-11 |
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Owner name: JIANGSU ANKURA SMART TRANSMISSION ENGINEERING TECH Free format text: FORMER NAME: JIANGSU ANKURA EHV CABLE ACCESSORIES CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 213333 Tianmu Lake Industrial Park, Liyang Economic Development Zone, Jiangsu, China Patentee after: Jiangsu Ankura Smart Transmission Engineering Technology Co., Ltd. Address before: 213333 Tianmu Lake Industrial Park, Liyang Economic Development Zone, Jiangsu, China Patentee before: Jiangsu Ankura EHV Cable Accessories Co., Ltd. |