CN202159951U - 110 kV high altitude porcelain bushing type cable terminal - Google Patents
110 kV high altitude porcelain bushing type cable terminal Download PDFInfo
- Publication number
- CN202159951U CN202159951U CN2011203061371U CN201120306137U CN202159951U CN 202159951 U CN202159951 U CN 202159951U CN 2011203061371 U CN2011203061371 U CN 2011203061371U CN 201120306137 U CN201120306137 U CN 201120306137U CN 202159951 U CN202159951 U CN 202159951U
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- porcelain bushing
- high altitude
- stress cone
- bushing type
- type cable
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Abstract
An 110 kV high altitude porcelain bushing type cable terminal belongs to cable accessories of high voltage power transmission and transformation systems. The porcelain bushing umbrella skirt creepage distance of the 110 kV high altitude porcelain bushing type cable terminal is 4500mm. A stress cone is a mould pressing prefabricated member made of ethylene-propylene-diene monomer rubber, and the centripetal interference of the inner diameter of the stress cone ranges from 5mm to 8mm. A seal ring at the position of a seal interface is a mound pressing prefabricated member made of silicon rubber, and the ratio of the cross sectional area of the seal ring and the cross sectional area of a built-in U-shaped groove is 1.3 to 1.35:1. The 110 kV high altitude porcelain bushing type cable terminal meets requirements of power transmission and transformation in high altitude areas, and guarantees that elastic seal fit of an inner circuit of the stress cone and the contact surface of the cable to be more accurate and reasonable. Heat resistance, low-temperature elasticity, aging resistance and oil resistance of all seal rings are superior to those of the prior art, and the area ratio of the sealing ring and the built-in U-shaped groove tends to be more reasonable, thereby guaranteeing whole sealing performance, preventing built-in insulating liquid from leaking, prolonging maintenance period and service life of products, and reducing maintenance cost.
Description
Technical field
The utility model belongs to the electric cable accessories of high voltage power transmission and transforming system.
Background technology
The 110kV cable termination is used for the overhead wire of national grid electric power course of conveying and the connecting portion of underground cable.At present, domestic newly-built high-tension cable engineering adopts the prefabricated cable terminal mostly, and homemade 110kV porcelain bushing type cable termination is exactly wherein a kind of.The insulator full skirt creep distance of this cable termination is all between 3906～3960mm; Acrylonitrile-butadiene rubber or ethylene-propylene rubber circle are all adopted in used O-ring seal; The full skirt creep distance that produces 110kV porcelain bushing type cable termination like Changsha Cable Accessory CO., Ltd. is 3960mm, and sealed interface adopts the acrylonitrile-butadiene rubber sealing ring; The full skirt creep distance that the Beijing State Electricity Sihwei Electric Power Technology Co., Ltd produces 110kV porcelain bushing type cable termination is 3906mm, and sealed interface adopts the acrylonitrile-butadiene rubber circle; The full skirt creep distance that Jiangsu Ankura EHV Cable Accessories Co., Ltd. produces 110kV porcelain bushing type cable termination is 3910mm, and sealed interface adopts the ethylene-propylene rubber circle.The filthy 3.1cm/kV requirement of 110kV cable termination IV level among the GB/T1107-2002 though above-mentioned known 110kV porcelain bushing type cable termination is up to state standards; But still the gradation for surface pollution environment of discontented high altitude localities, full border; Be applied to below the above high altitude localities ubiquity of height above sea level 3000M not enough: (1) insulator full skirt creep distance is not enough; High voltage withstanding poor-performing is prone to produce disruptive discharge.(2) the O-ring seal cross-sectional area at sealed interface place and embedded slot cross-sectional area is bigger, is generally 1.5:1, seepage phenomenon outside the dielectric in long-term compression back cracky takes place.(3) built-in stress cone internal diameter specification broad is general, and its internal diameter entad magnitude of interference makes the interior circle of stress cone precisely reasonable inadequately with the resilient engagement of the contact-making surface of cable between 2～10mm, also is the Another reason that dielectric exosmoses in the generation.Above deficiency causes maintenance cost to strengthen and the power failure frequency increases, and makes the project of transmitting and converting electricity of the known inapplicable high altitude localities of 110kV porcelain bushing type cable termination.
Summary of the invention
The purpose of the utility model is a kind of high creep distance of high altitude localities project of transmitting and converting electricity, non-leakage 110KV porcelain bushing type cable termination of being applicable to of development.
For the technical scheme that realizes above-mentioned purpose the utility model is the high height above sea level porcelain bushing type of a kind of 110kV of a design cable termination; It is made up of shielding cap, stub, porcelain bushing, dielectric, stress cone, cable protection pipe, mounting flange, pivot flange, supporting insulator, sealed interface; Wherein said porcelain bushing is that full skirt is stacked, and length is that 1350mm, full skirt creep distance are 4500mm; Stress cone is an ethylene propylene diene rubber mold pressing prefabricated component, and the internal diameter entad magnitude of interference is 5～8mm; The sealed interface place uses sealing ring to be silicon rubber mold pressing prefabricated component, and the cross-sectional area of sealing ring is 1.3～1.35:1 with build-in U type groove cross-sectional area ratio.
Compare with known technology, its basic structure is identical, but because the utility model increases to 4500mm to porcelain bushing full skirt creep distance; And make length still keep 1350mm; Entire length is not extended, be convenient to the installing and replacing construction, also satisfied high altitude localities power transmission engineering needs; The internal diameter of the counter stress awl entad magnitude of interference is controlled between 5～8mm, has guaranteed that circle cooperates more precisely rationally with the elastic packing of the contact-making surface of cable in the stress cone, has prevented the dielectric seepage; The sealing ring of all sealed interfaces all adopts silicon rubber loop; Its thermal endurance, low temperature elasticity, resistance to ag(e)ing, oil resistance etc. all are superior to the acrylonitrile-butadiene rubber or the ethylene-propylene rubber circle that adopt in the known technology; And sealing ring more becomes rationally with the cross-sectional area ratio of build-in U type groove, guarantees whole sealing, has prevented the seepage of built-in insulation liquid; Thereby prolonged maintenance of products cycle and useful life, reduced maintenance cost.
Description of drawings
Fig. 1 is the utility model structural representation.
As shown in the figure, the utility model is made up of shielding cap 1, stub 2, porcelain bushing 3, dielectric 4, stress cone 5, cable protection pipe 6, mounting flange 7, pivot flange 8, supporting insulator 9, sealed interface (10).
Embodiment
Specify the structure and the assembling process of the utility model below in conjunction with accompanying drawing, to the cable of insulating barrier external diameter Φ 70.2mm.
1. prefabricated ethylene propylene diene rubber stress cone (5): will satisfy hardness is the stress cone (5) of Φ 65.2mm for the EPDM elastomeric compound of Shao A hardness≤75, tensile strength>=10MPa, percentage elongation>=57%, permanent set≤30% becomes internal diameter through molded vulcanization, promptly guarantee internal diameter entad the magnitude of interference be 5mm.
2. prefabricated silica gel sealing ring: with reference to build-in U-lag specification, through respectively moulding of molded vulcanization, the silicon rubber loop that matches is controlled its cross-sectional area and build-in U type groove cross-sectional area than being in the scope of 1.2～1.3:1.
3. the prefabricated porcelain bushing of external coordination (3): specification length is that 1350mm, cluster parachute creep distance are the stacked high-strength magnetosheath pipe of 30 layers of cluster parachute of 4500mm.
4. gold utensils such as prefabricated supporting contact rod (2), cable protection pipe (6), mounting flange (7), pivot flange (8) and securing member.
5 assembly steps are as follows: All seals in the component interfaces (10) of the U-shaped groove embedded inlay solid silicone rubber ring after crimping conductive rod (2) - set into the stress cone (5) - set into the mounting flange (7) - set into the cable protection tube (6) - set into the supporting flange (8) - fixed support flange (8) - fixed mounting flange (7) - fixed supporting insulator (9) - - fixed ceramic casing (3) - perfusion insulating liquid (4) - fixed upper fittings - fixed shielding cap (1) - sealed lead, connect the grounding cable.
Claims (1)
1.110kV high height above sea level porcelain bushing type cable termination; Constitute by shielding cap (1), stub (2), porcelain bushing (3), dielectric (4), stress cone (5), cable protection pipe (6), mounting flange (7), pivot flange (8), supporting insulator (9), sealed interface (10); It is characterized in that said porcelain bushing (3) is stacked for full skirt; Length is 1350mm, and the full skirt creep distance is 4500mm; Stress cone (5) is the ethylene-propylene diene copolymer molding, and its internal diameter entad magnitude of interference is 5～8mm; The used O-ring seal of sealed interface (10) is the silicon rubber mould casting die, and its cross-sectional area is 1.3～1.35:1 with build-in U type groove cross-sectional area ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203061371U CN202159951U (en) | 2011-08-22 | 2011-08-22 | 110 kV high altitude porcelain bushing type cable terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203061371U CN202159951U (en) | 2011-08-22 | 2011-08-22 | 110 kV high altitude porcelain bushing type cable terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202159951U true CN202159951U (en) | 2012-03-07 |
Family
ID=45767574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203061371U Expired - Lifetime CN202159951U (en) | 2011-08-22 | 2011-08-22 | 110 kV high altitude porcelain bushing type cable terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202159951U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594695A (en) * | 2014-12-27 | 2015-05-06 | 重庆市喜植机械设备有限公司 | High-voltage electricity transmitting device |
| CN104594694A (en) * | 2014-12-27 | 2015-05-06 | 重庆市喜植机械设备有限公司 | Electric power high voltage transmission device |
| CN104612456A (en) * | 2015-01-20 | 2015-05-13 | 徐勇 | High voltage transmission device |
| CN104631899A (en) * | 2015-01-20 | 2015-05-20 | 徐勇 | High voltage transmission device |
-
2011
- 2011-08-22 CN CN2011203061371U patent/CN202159951U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594695A (en) * | 2014-12-27 | 2015-05-06 | 重庆市喜植机械设备有限公司 | High-voltage electricity transmitting device |
| CN104594694A (en) * | 2014-12-27 | 2015-05-06 | 重庆市喜植机械设备有限公司 | Electric power high voltage transmission device |
| CN104612456A (en) * | 2015-01-20 | 2015-05-13 | 徐勇 | High voltage transmission device |
| CN104631899A (en) * | 2015-01-20 | 2015-05-20 | 徐勇 | High voltage transmission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |