CN102376402A - Heat shrinkage bush - Google Patents
Heat shrinkage bush Download PDFInfo
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- CN102376402A CN102376402A CN2010102640451A CN201010264045A CN102376402A CN 102376402 A CN102376402 A CN 102376402A CN 2010102640451 A CN2010102640451 A CN 2010102640451A CN 201010264045 A CN201010264045 A CN 201010264045A CN 102376402 A CN102376402 A CN 102376402A
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- bush
- electric field
- heat
- layer
- shrinkable
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Abstract
The invention relates to a heat shrinkage bush, which comprises three layers: an inner shielding layer, an electric field stress control layer and an insulating layer, wherein the inner shielding layer has electrical conductivity; the electric field stress control layer is arranged outside the inner shielding layer; and the insulating layer is arranged on the outer layer of the electric field stress control layer. The heat shrinkage bush has the beneficial effects that the operational reliability of a power supply bus bar is improved, and laying in occasions of building on stilts, traversing and the like can be performed. Simultaneously, the electric strength, the heat resistance and the ageing resistance of the heat shrinkage bush are improved, compared with those of the bush adopting a single insulating material.The heat shrinkage bush is more suitable for the conventional operational condition of an electrical power system.
Description
Technical field
The present invention relates to a kind of heat-shrinkable T bush, relate in particular to the structure of this heat-shrinkable T bush.
Background technology
The insulation mode of the power supply busbar in the prior art in 10kV power switch and the transformer station has several types: a based epoxy resin or the insulation of epoxy resin impregnating varnish layer platen; Its shortcoming is that the elasticity of material is limited, is prone to be full of cracks in service, causes insulation breakdown; Cost is also high especially, and technology is comparatively complicated; The 2nd, wrapped teflin tape, useless power, material cost height when its shortcoming is useless, and in insulation system, infiltrate impurity easily; The 3rd, sulfuration or extrude the PVC insulating material, its shortcoming is that material is prone to cracking, and thermal endurance is not enough; The 4th, the heat-shrinkable T bush of shrinkage polyolefine material; This also is an electric power system method commonly used in recent years, concentrates but four wedge angles in the busbar cross section go out electric field stress, is prone to electric field breakdown; And be not tight contact structures between metal busbar and heat-shrinkable T bush, defectives such as the aging formation of air gap copper corrosion also take place easily.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of heat-shrinkable T bush, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme:
The present invention includes: three layers; Described three layers is to be provided with the internal shield with conduction property; Outside internal shield, be provided with the electric field stress key-course; Skin at the electric field stress key-course is an insulating barrier.
Compared with prior art, the invention has the beneficial effects as follows: improved the operational reliability of power supply busbar, laying of occasion such as can make somebody a mere figurehead, pass through; Make electric strength, thermal endurance and the ageing resistance of this kind heat-shrinkable T bush simultaneously, increase than employing single insulating material, more the conventional operation condition of suitable power system.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Visible by Fig. 1: as to the present invention includes: three layers; Described three layers is to be provided with the internal shield 1 with conduction property; Outside internal shield 1, be provided with electric field stress key-course 2; Skin at electric field stress key-course 2 is an insulating barrier 3;
Described trilaminate material is to realize that through disposable coextrusion, common assisting according to mode crosslinked, that coextend the gross thickness in whole cross section is at 2.5mm～3.0mm.
The material of described internal shield 1 is the polyethylene blend polymeric material with conduction property, and the matrix resin of material is a polyethylene, can carry out the plastic milling processing and preparing through adding conductive acetylene carbon black and processing aid; The material of described electric field stress key-course 2 is the polyethylene blend polymeric material with high-k character; The matrix resin of material is polyethylene and haloflex blend, can carry out the plastic milling processing and preparing through adding wear-resisting carbon black and barium titanate heavy metal ion salt and processing aid; Described insulating barrier 3 has the polyethylene blend polymeric material of insulating property (properties), and the matrix resin of material is a polyethylene, can carry out the plastic milling processing and preparing through adding small amounts aluminium and processing aid.The matrix resin of these three kinds of materials, function additive and processing aid are the chemical product that routinizes of market sale; Proportioning between the composition and processing method also are prior aries.
The thickness of described internal shield 1 is between 0.5mm～0.6mm, and electric field stress key-course 2 thickness are between 0.4mm～0.6mm, and insulating barrier 3 thickness are between 1.6mm～1.8mm.
The electrical properties parameter of layers of material is controlled to be: internal shield, the specific volume resistance of its material requires 1.0 * 10
1～2Ω .M; Stress control layer, the specific volume resistance of its material are 1.0 * 10
9～ 11Ω .M, dielectric constant are 10～35; Insulating barrier, the specific volume resistance of its material are 1.0 * 10
12～13Ω .M, dielectric constant are 2.5～3.2.
Heat-shrinkable T bush inner surface of the present invention has conductive shielding layer, can cushion the insulation polyolefine material with the direct contact of metal busbar, uniform electric field, and help the raising of electric property; The intermediate layer is the electric potential gradient distribution that the stress control layer of high-k is used to cushion electric conducting material and insulating material, evacuates the electric field stress of the tip formation of rectangle busbar; External insulation layer adopts the polyolefin insulation material manufacture to have high insulation, fire-retardant, anti-aging mechanical protective effect arranged simultaneously; Can make that shielding/Stress Control of the present invention/insulating is used for the insulating protection of metal busbar for the heat-shrinkable T bush of one, can improve the power supply busbar operational reliability, laying of occasion such as can make somebody a mere figurehead, pass through.The present invention simultaneously makes electric strength, thermal endurance and the ageing resistance of this kind heat-shrinkable T bush, than adopting the single insulating material to increase and the conventional operation condition of suitable power system.
At first go out mode to realize conducting electricity the no gap of polyolefin, Stress Control polyolefine material and polyolefin insulation compound through three-layer co-extruded during manufacturing, the scope that the thickness of trilaminate material is controlled successively is respectively 0.5～0.6mm, 0.4～0.6mm and 1.6～1.8mm; Sleeve pipe after extruding has three kinds of functions in the heat-shrinkable T bush of one through just having prepared behind the expansion operation through auxilliary according to crosslinked again.
Claims (4)
1. a heat-shrinkable T bush comprises: three layers; It is characterized in that: described three layers is to be provided with the internal shield with conduction property; Outside internal shield, be provided with the electric field stress key-course; Skin at the electric field stress key-course is an insulating barrier.
2. heat-shrinkable T bush according to claim 1 is characterized in that: described trilaminate material is to realize that through disposable coextrusion, common assisting according to mode crosslinked, that coextend the gross thickness in whole cross section is at 2.5mm～3.0mm.
3. heat-shrinkable T bush according to claim 1 is characterized in that: the thickness of described internal shield is between 0.5mm～0.6mm, and electric field stress key-course thickness is between 0.4mm～0.6mm, and thickness of insulating layer is between 1.6mm～1.8mm.
4. heat-shrinkable T bush according to claim 1 is characterized in that: the specific volume resistance of internal shield requires 1.0 * 10
1～2Ω .M; The specific volume resistance of stress control layer is 1.0 * 10
9～ 11Ω .M, dielectric constant are 10～35; The specific volume resistance of insulating barrier is 1.0 * 10
12～13Ω .M, dielectric constant are 2.5～3.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010264045 CN102376402B (en) | 2010-08-24 | 2010-08-24 | Heat shrinkage bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010264045 CN102376402B (en) | 2010-08-24 | 2010-08-24 | Heat shrinkage bush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102376402A true CN102376402A (en) | 2012-03-14 |
| CN102376402B CN102376402B (en) | 2013-07-10 |
Family
ID=45794868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010264045 Active CN102376402B (en) | 2010-08-24 | 2010-08-24 | Heat shrinkage bush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102376402B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741959A (en) * | 2016-05-04 | 2016-07-06 | 江苏红峰电缆集团有限公司 | Single-core high-voltage power cable for 8.7/10kv and lower voltage |
| CN105957585A (en) * | 2016-05-09 | 2016-09-21 | 浙江睿智电气科技有限公司 | Insulated bus and preparation method thereof |
| CN105976921A (en) * | 2016-06-30 | 2016-09-28 | 江苏红峰电缆集团有限公司 | High-strength optical fiber composite cable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0116393A2 (en) * | 1983-01-06 | 1984-08-22 | RAYCHEM CORPORATION (a Delaware corporation) | Dimensionally recoverable article |
| CN1103352A (en) * | 1993-12-03 | 1995-06-07 | 国营成都侨兴实业公司 | Process for shaping fibre reinforced thermal shrinkage composite |
| CN2307977Y (en) * | 1997-09-22 | 1999-02-17 | 陆启明 | Aluminized heat-shinkage sleeving |
| CN1451197A (en) * | 2000-08-30 | 2003-10-22 | 天马株式会社 | Armature for heat shrinkable sleeve and heat shrinkable sleeve comprisingit |
| CN101486814A (en) * | 2008-01-17 | 2009-07-22 | 立讯精密工业（深圳）有限公司 | Method for producing low-smoke halogen-free non-nitrogen flame-retardant heat-shrinkable material sheathed tube and casing tube |
-
2010
- 2010-08-24 CN CN 201010264045 patent/CN102376402B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0116393A2 (en) * | 1983-01-06 | 1984-08-22 | RAYCHEM CORPORATION (a Delaware corporation) | Dimensionally recoverable article |
| CN1103352A (en) * | 1993-12-03 | 1995-06-07 | 国营成都侨兴实业公司 | Process for shaping fibre reinforced thermal shrinkage composite |
| CN2307977Y (en) * | 1997-09-22 | 1999-02-17 | 陆启明 | Aluminized heat-shinkage sleeving |
| CN1451197A (en) * | 2000-08-30 | 2003-10-22 | 天马株式会社 | Armature for heat shrinkable sleeve and heat shrinkable sleeve comprisingit |
| CN101486814A (en) * | 2008-01-17 | 2009-07-22 | 立讯精密工业（深圳）有限公司 | Method for producing low-smoke halogen-free non-nitrogen flame-retardant heat-shrinkable material sheathed tube and casing tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741959A (en) * | 2016-05-04 | 2016-07-06 | 江苏红峰电缆集团有限公司 | Single-core high-voltage power cable for 8.7/10kv and lower voltage |
| CN105957585A (en) * | 2016-05-09 | 2016-09-21 | 浙江睿智电气科技有限公司 | Insulated bus and preparation method thereof |
| CN105976921A (en) * | 2016-06-30 | 2016-09-28 | 江苏红峰电缆集团有限公司 | High-strength optical fiber composite cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102376402B (en) | 2013-07-10 |
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| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU JIAMENG ELECTRIC POWER EQUIPMENT CO., LTD. Free format text: FORMER OWNER: JIAMENG POWER EQUIPMENT CO., LTD., SHANGHAI Effective date: 20120924 |
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Free format text: CORRECT: ADDRESS; FROM: 201515 JINSHAN, SHANGHAI TO: 226236 NANTONG, JIANGSU PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20120924 Address after: 226236, Jiangsu Qidong Economic Development Zone, Qidong Binhai Industrial Park, the Sea Road (central science and Technology Park) Applicant after: JIANGSU JIAMENG ELECTRICAL EQUIPMENT CO., LTD. Address before: 201515 No. 346, Qin bend road, Jinshan Wei Town, Shanghai, Jinshan District Applicant before: Shanghai Melec Electric Power Equipment Co., Ltd. |
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