CN202474799U - High-voltage cable flexible joint provided with non-linear shielding layers - Google Patents
High-voltage cable flexible joint provided with non-linear shielding layers Download PDFInfo
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- CN202474799U CN202474799U CN2012201087225U CN201220108722U CN202474799U CN 202474799 U CN202474799 U CN 202474799U CN 2012201087225 U CN2012201087225 U CN 2012201087225U CN 201220108722 U CN201220108722 U CN 201220108722U CN 202474799 U CN202474799 U CN 202474799U
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Abstract
The utility model relates to a high-voltage cable flexible joint, in particular to a high-voltage cable flexible joint provided with non-linear shielding layers, aiming at solving the problems that an internal semiconductive shielding layer, an external semiconductive shielding layer and an insulating layer of the high-voltage cable flexible joint with the existing structure are poorer in surface smoothness and roundness, so that the local electric field intensity is increased, electrical tree is caused, and the joint is shorter in service life and even damaged. The high-voltage cable flexible joint comprises an internal semiconductive shielding layer, a crosslinked polyethylene insulating layer, an external semiconductive shielding layer, a semiconductive waterproof layer, a metal sheath and two cables, wherein the outer side of an integrally connected wire core is sequentially coated with the internal semiconductive shielding layer, the crosslinked polyethylene insulating layer, the external semiconductive shielding layer, the semiconductive waterproof layer and the metal sheath from inside to outside; and the high-voltage cable flexible joint also comprises the internal non-linear shielding layer and the external non-linear shielding layer, wherein the internal non-linear shielding layer is coated between the internal semiconductive shielding layer and the crosslinked polyethylene insulating layer in an extruding way. The high-voltage cable flexible joint is used for connecting the cables in the high voltage field.
Description
Technical field
The utility model relates to a kind of high-tension cable connecting hose.
Background technology
Advantages such as dielectric property are good because of having for cross-linked polyethylene insulated cable, transmission capacity is big, laying installation and operation maintenance are convenient are in high pressure, superhigh pressure field consumption cumulative year after year.Cable joint is the important component part of Voltage Cable Lines Construction, and its performance directly influences cable line reliability of operation and stability.High-voltage cross-linking polythene insulated cable joint mainly contains two kinds of patterns: prefabricated joint and connecting hose, wherein connecting hose outside dimension and cable are approaching, are mainly used in submarine cable and connect.
When the insulation system of High Voltage XLPE Power Cable did not have defective, its inner maximum field intensity always was positioned at the surface that cable insulation contacts with inside and outside semiconductive shielding layer, and also promptly this position is the weak part of high-voltage cable insulating.Obviously, the harm that the defective of cable insulation laminar surface is brought maybe be more serious, and it can make local electric field strength further increase, and causes occurring partial discharge, causes electric branch, destroys until cable XLPE insulation breakdown.For avoiding defectives such as projection, depression, impurity occurring at High Voltage XLPE Power Cable insulating barrier and semi-conductive screen bed boundary; Semi-conductive screen, XLPE insulation, the three-layer co-extruded technology of semi-conductive shield outside in High Voltage XLPE Power Cable is produced, all adopting at present; The XLPE insulating material that uses is ultra-clean high-voltage cable insulating material, and semi-conductive shielding material is the smooth high-tension cable semi-conductive shielding material of extruding.
In existing high-tension cable connecting hose manufacturing technology; Interior semi-conductive screen, insulation and semi-conductive shield outside material in the joint are identical with the cable body material; Can extrude through the wrapped post moulding of layering, crosslinking process or layering injection moulding, crosslinking process makes, each layer is connected with the respective layer of cable body respectively.The high-tension cable connecting hose is field fabrication, at first utilizes cutter to exploit " pencil stub " shape structure at two cable ends.As everyone knows, no matter take which kind of manual exploitation measure, semiconductive shielding layer that all can't guarantee to exploit out and surface of insulating layer reach the smooth degree of cable first shielding and first insulating surface.And then, be difficult to guarantee that the connecting hose inner semiconductor layer is connected smooth, rounding with insulating barrier with the cable body corresponding construction, reach the smooth degree of each body structure surface in the cable body.Thereby the defective that insulating surface exists in the existing structure high pressure XLPE insulated cable connecting hose is the latency that causes high-voltage cable joint to destroy.Normal conditions, high-tension cable connecting hose are weakness in the cable line, are the main generating region of line fault.
The utility model content
The purpose of the utility model be for the inside and outside semiconductive shielding layer that solves existing structure high-tension cable connecting hose and surface of insulating layer smoothness and roundness relatively poor; Local electric field strength is increased; Cause electric branch, cause the problem that the joint life-span reduces even destroy.And then a kind of high-tension cable connecting hose with non-linear shielding layer is provided.
The utility model is to address the above problem the technical scheme of taking to be: a kind of high-tension cable connecting hose with non-linear shielding layer of the utility model comprises inner semiconductor layer, crosslinked polyetylene insulated layer, out semiconductor layer, semiconductive water blocking layer, metallic sheath and two cables; Every cable is made up of core, first inner semiconductor layer, the first crosslinked polyetylene insulated layer, first out semiconductor layer, the first semiconductive water blocking layer and first metallic sheath; The end of two cables is a pencil capitiform structure; The core of exploitation place of two cables links into an integrated entity; The outside of the core that links into an integrated entity is coated with inner semiconductor layer, crosslinked polyetylene insulated layer, out semiconductor layer, semiconductive water blocking layer and metallic sheath successively by order from inside to outside; Each is connected the two ends of inner semiconductor layer with corresponding first inner semiconductor layer; Each is connected the two ends of crosslinked polyetylene insulated layer with the corresponding first crosslinked polyetylene insulated layer; Non-linear shielding layer and outer non-linear shielding layer in described connecting hose also comprises; Non-linear shielding layer is coated between inner semiconductor layer and the crosslinked polyetylene insulated layer in described; And each is connected the two ends of interior non-linear shielding layer with the corresponding first crosslinked polyetylene insulated layer; Described outer non-linear shielding layer is coated between crosslinked polyetylene insulated layer and the out semiconductor layer, and the two ends of outer non-linear shielding layer respectively are connected with corresponding first out semiconductor layer, and the two ends of out semiconductor layer coat the junction of the outer non-linear shielding layer and first out semiconductor layer respectively; The semiconductive water blocking layer is coated on the outside of out semiconductor layer and the outside of first out semiconductor layer; And each is connected the two ends of semiconductive water blocking layer with the corresponding first semiconductive water blocking layer, and the outside of semiconductive water blocking layer is coated with metallic sheath, and each is connected the two ends of metallic sheath with corresponding first metallic sheath.
The beneficial effect of the utility model is: the material of the non-linear shielding layer of the utility model (conductivity is or/and the insulating material that relative dielectric constant changes with the change of electric field strength) have stronger in non-uniform electric field the ability of homogenizing Electric Field Distribution voluntarily; The non linear coefficient of this non-linear insulating material is 0.5～10; The connecting hose of the utility model coats non-linear shielding layer in one deck between inner semiconductor layer and crosslinked polyetylene insulated layer; Coat the outer non-linear shielding layer of one deck between crosslinked polyetylene insulated layer and the outer half charged screen; When rough defective such as projection, depression can the insulating surface in joint appears in non-linear shielding layer; The Electric Field Distribution of homogenizing fault location reduces maximum field intensity.The FInite Element analog simulation is the result show; Semi-conductive screen projection or insulation projection appear in the semiconductive shielding layer of traditional structure high-tension cable connecting hose and XLPE interfacial dielectric layer place; The non-linear shielding layer of the utility model high-tension cable connecting hose and semiconductive shielding layer are at the interface or non-linear shielding layer and XLPE interfacial dielectric layer place when semi-conductive screen projection, non-linear shielding projection or insulation projection occurring; When shape for lugs, when measure-alike, near the maximum field intensity near the high-tension cable connecting hose inner process of the maximum field strength ratio the utility model structure the traditional structure high-tension cable connecting hose inner process is big more than 30%.Explanation thus; Extruding non-linear shielding layer in the utility model connecting hose between inside and outside semiconductive shielding layer and insulating barrier respectively helps inhibition owing to the electric field that insulating surface defective (smooth relatively poor with the rounding degree) produces is concentrated; Effectively reduce electric field strength; Can effectively suppress the initiation of electric branch, improve the performance of high-tension cable connecting hose, prolong useful life.
Description of drawings
Fig. 1 is the main sectional structure sketch map of the utility model.
Embodiment
Embodiment one: combine Fig. 1 that this execution mode is described; A kind of high-tension cable connecting hose with non-linear shielding layer of this execution mode comprises inner semiconductor layer 13, crosslinked polyetylene insulated layer 11, out semiconductor layer 9, semiconductive water blocking layer 8, metallic sheath 7 and two cable I; Every cable I is made up of core 4, first inner semiconductor layer 5, first crosslinked polyetylene insulated layer 6, first out semiconductor layer 1, the first semiconductive water blocking layer 2 and first metallic sheath 3; The end of two cable I is a pencil capitiform structure; The core 4 of exploitation place of two cable I links into an integrated entity; The outside of the core 4 that links into an integrated entity is coated with inner semiconductor layer 13, crosslinked polyetylene insulated layer 11, out semiconductor layer 9, semiconductive water blocking layer 8 and metallic sheath 7 successively by order from inside to outside; Each is connected the two ends of inner semiconductor layer 13 with corresponding first inner semiconductor layer 5; Each is connected the two ends of crosslinked polyetylene insulated layer 11 with the corresponding first crosslinked polyetylene insulated layer 6; Non-linear shielding layer 12 and outer non-linear shielding layer 10 in described connecting hose also comprises; Non-linear shielding layer 12 is coated between inner semiconductor layer 13 and the crosslinked polyetylene insulated layer 11 in described, and the two ends of interior non-linear shielding layer 12 each is connected with the corresponding first crosslinked polyetylene insulated layer 6, described outer non-linear shielding layer 10 is coated between crosslinked polyetylene insulated layer 11 and the out semiconductor layer 9; And each is connected the two ends of outer non-linear shielding layer 10 with corresponding first out semiconductor layer 1; The two ends of out semiconductor layer 9 coat the junction of the outer non-linear shielding layer 10 and first out semiconductor layer 1 respectively, and semiconductive water blocking layer 8 is coated on the outside of out semiconductor layer 9 and the outside of first out semiconductor layer 1, and the two ends of semiconductive water blocking layer 8 respectively are connected with the corresponding first semiconductive water blocking layer 2; The outside of semiconductive water blocking layer 8 is coated with metallic sheath 7, and each is connected the two ends of metallic sheath 7 with corresponding first metallic sheath 3.
The material of non-linear shielding layer 12 and outer non-linear shielding layer 10 was the cross-linked polyolefin that is mixed with two or more mixtures in carborundum, zinc oxide, aluminium oxide, barium titanate, strontium titanates, zirconia titanate, carbon black, graphite, carbon fiber, the CNT in this execution mode was described.
Embodiment two: combine Fig. 1 that this execution mode is described; The two ends of the outer non-linear shielding layer 10 of this execution mode are respectively equipped with the first slope linkage section 10-1, and the end of each first slope linkage section 10-1 is connected with corresponding first out semiconductor layer 1.So be provided with, effectively improve the mechanical performance of connecting hose, meet design requirement and actual needs.Other is identical with embodiment one.
Embodiment three: combine Fig. 1 that this execution mode is described; The two ends of the out semiconductor layer 9 of this execution mode are respectively equipped with the second slope linkage section 9-1, and the end of each second slope linkage section 9-1 coats the junction of the corresponding outer non-linear shielding layer 10 and first out semiconductor layer 1 respectively.So be provided with, effectively improve the mechanical performance of connecting hose, meet design requirement and actual needs.Other is identical with embodiment one or two.
Embodiment four: combine Fig. 1 that this execution mode is described, the two ends of the semiconductive water blocking layer 8 of this execution mode are respectively equipped with the 3rd slope linkage section 8-1, and the end of each the 3rd slope linkage section 8-1 is connected with the corresponding first semiconductive water blocking layer 2.So be provided with, effectively improve the mechanical performance of connecting hose, meet design requirement and actual needs.Other is identical with embodiment one or two.
Embodiment five: combine Fig. 1 that this execution mode is described, the two ends of the metallic sheath 7 of this execution mode are respectively equipped with the 4th slope linkage section 7-1, and the end of each the 4th slope linkage section 7-1 is connected with corresponding first metallic sheath 3.So be provided with, effectively improve the mechanical performance of connecting hose, meet design requirement and actual needs.Other is identical with embodiment one or two.
Embodiment six: combine Fig. 1 that this execution mode is described, the material of the metallic sheath 7 of this execution mode is aluminium or lead.So be provided with, effectively improve the mechanical performance of connecting hose, meet design requirement and actual needs.Other is identical with embodiment one or two.
High-tension cable connecting hose manufacturing process
(1), the end of two cables that desire is connected exploits " pencil stub " shape structure, makes each laminar surface smooth as far as possible, the about 1m-1.5m of length.
(2), two cable cores are connected and finishing, make its surperficial rounding as far as possible through the layering solder technology.
(3), the utilization semi-conductive shielding material identical with cable body recover inner semiconductor layer 13 and crosslinked, cooling through mould pressing method, makes its smooth surface, smooth as far as possible.Molding temperature is 120 ℃, and crosslinking temperature is 180-200 ℃, and crosslinking time is 30min, and the cooling and demolding temperature is below 50 ℃.
(4), utilize the non-linear insulating material of crosslinkable (non linear coefficient is not less than 0.5) through mould pressing method non-linear shielding layer 12 in inner semiconductor layer 13 outsides make; Its two ends are connected with the first crosslinked polyetylene insulated layer 6 of two cables respectively; Crosslinked, the also demoulding of cooling make its surface and smooth, smooth with the first crosslinked polyetylene insulated layer, 6 junction as far as possible.Molding temperature is 120 ℃, and crosslinking temperature is 180-200 ℃, and crosslinking time is 30min, and calcining temperature is below 50 ℃.
(5), particular manufacturing craft is enclosed within the cable core junction, utilize the insulating material identical to make crosslinked polyetylene insulated layer 11 and crosslinked, slowly cool to 50 ℃ then, make its smooth surface, smooth as far as possible with bottom knockout through injection moulding process with cable body.The thickness of crosslinked polyetylene insulated layer 11 is than the big 2-10mm of first insulation thickness, and its two ends link to each other with ramped shaped with first crosslinked polyetylene insulated layer 6.Injection temperature is 120 ℃, and crosslinking temperature is 180-200 ℃, and crosslinking time is 2-6h, and be 1-3h cooling time.
(6), utilize the non-linear insulating material of crosslinkable through mould pressing method non-linear shielding layer 10 outside crosslinked polyetylene insulated layer 11 outside make; Its two ends are connected with first semi-conductive shield outside 1 of two cables respectively; Crosslinked, the also demoulding of cooling make its surface and smooth, smooth with first out semiconductor layer, 1 junction as far as possible.Molding temperature is 120 ℃, and crosslinking temperature is 180-200 ℃, and crosslinking time is 30min, and calcining temperature is below 50 ℃.
(7), the utilization semi-conductive shielding material identical with cable body made out semiconductor layer 9 in non-linear shielding layer 10 outsides outside through mould pressing method; Its two ends coat the junction of the outer non-linear shielding layer 10 and first out semiconductor layer 1; Crosslinked, the also demoulding of cooling make its smooth surface, smooth as far as possible.Molding temperature is 120 ℃, and crosslinking temperature is 180-200 ℃, and crosslinking time is 30min, and calcining temperature is below 50 ℃.
(8), the utilization semiconductive material identical with cable body in the outside of first out semiconductor layer 1 and out semiconductor layer 9 wrapped semiconductive water blocking layer 2, recover the semiconductive water blocking layer.
(9), add metallic sheath 7, weld with first metallic sheath 3 through argon arc welding mutually at its two ends in semiconductive water blocking layer 2 outsides.
Claims (6)
1. high-tension cable connecting hose with non-linear shielding layer; Described connecting hose comprises inner semiconductor layer (13), crosslinked polyetylene insulated layer (11), out semiconductor layer (9), semiconductive water blocking layer (8), metallic sheath (7) and two cables (I); Every cable (I) is made up of core (4), first inner semiconductor layer (5), first crosslinked polyetylene insulated layer (6), first out semiconductor layer (1), the first semiconductive water blocking layer (2) and first metallic sheath (3); The end of two cables (I) is a pencil capitiform structure; The core (4) of exploitation place of two cables (I) links into an integrated entity; The outside of the core that links into an integrated entity (4) is coated with inner semiconductor layer (13), crosslinked polyetylene insulated layer (11), out semiconductor layer (9), semiconductive water blocking layer (8) and metallic sheath (7) successively by order from inside to outside; Each is connected the two ends of inner semiconductor layer (13) with corresponding first inner semiconductor layer (5); Each is connected the two ends of crosslinked polyetylene insulated layer (11) with the corresponding first crosslinked polyetylene insulated layer (6); It is characterized in that: described connecting hose also comprises interior non-linear shielding layer (12) and outer non-linear shielding layer (10); Non-linear shielding layer (12) is coated between inner semiconductor layer (13) and the crosslinked polyetylene insulated layer (11) in described; And each is connected the two ends of interior non-linear shielding layer (12) with the corresponding first crosslinked polyetylene insulated layer (6); Described outer non-linear shielding layer (10) is coated between crosslinked polyetylene insulated layer (11) and the out semiconductor layer (9), and the two ends of outer non-linear shielding layer (10) respectively are connected with corresponding first out semiconductor layer (1), and the two ends of out semiconductor layer (9) coat the junction of outer non-linear shielding layer (10) and first out semiconductor layer (1) respectively; Semiconductive water blocking layer (8) is coated on the outside of out semiconductor layer (9) and the outside of first out semiconductor layer (1); And each is connected the two ends of semiconductive water blocking layer (8) with the corresponding first semiconductive water blocking layer (2), and the outside of semiconductive water blocking layer (8) is coated with metallic sheath (7), and each is connected the two ends of metallic sheath (7) with corresponding first metallic sheath (3).
2. a kind of high-tension cable connecting hose according to claim 1 with non-linear shielding layer; It is characterized in that: the two ends of outer non-linear shielding layer (10) are respectively equipped with the first slope linkage section (10-1), and the end of each first slope linkage section (10-1) is connected with corresponding first out semiconductor layer (1).
3. a kind of high-tension cable connecting hose according to claim 1 and 2 with non-linear shielding layer; It is characterized in that: the two ends of out semiconductor layer (9) are respectively equipped with the second slope linkage section (9-1), and the end of each second slope linkage section (9-1) coats the junction of corresponding outer non-linear shielding layer (10) and first out semiconductor layer (1) respectively.
4. a kind of high-tension cable connecting hose according to claim 1 and 2 with non-linear shielding layer; It is characterized in that: the two ends of semiconductive water blocking layer (8) are respectively equipped with the 3rd slope linkage section (8-1), and the end of each the 3rd slope linkage section (8-1) is connected with the corresponding first semiconductive water blocking layer (2).
5. a kind of high-tension cable connecting hose according to claim 1 and 2 with non-linear shielding layer; It is characterized in that: the two ends of metallic sheath (7) are respectively equipped with the 4th slope linkage section (7-1), and the end of each the 4th slope linkage section (7-1) is connected with corresponding first metallic sheath (3).
6. a kind of high-tension cable connecting hose with non-linear shielding layer according to claim 1 and 2, it is characterized in that: the material of metallic sheath (7) is aluminium or lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201087225U CN202474799U (en) | 2012-03-21 | 2012-03-21 | High-voltage cable flexible joint provided with non-linear shielding layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201087225U CN202474799U (en) | 2012-03-21 | 2012-03-21 | High-voltage cable flexible joint provided with non-linear shielding layers |
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| Publication Number | Publication Date |
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| CN202474799U true CN202474799U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201087225U Withdrawn - After Issue CN202474799U (en) | 2012-03-21 | 2012-03-21 | High-voltage cable flexible joint provided with non-linear shielding layers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611067A (en) * | 2012-03-21 | 2012-07-25 | 哈尔滨理工大学 | High-voltage cable flexible joint with non-linear shielding layers |
| CN103490351A (en) * | 2013-09-05 | 2014-01-01 | 长园电力技术有限公司 | Manufacturing process of cross-linked polyethylene insulated cable main terminal molding stress control module |
| CN105514892A (en) * | 2016-01-27 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Wall bushing provided with shielding structure |
| KR20200028931A (en) * | 2017-07-13 | 2020-03-17 | 스미토모 덴키 고교 가부시키가이샤 | Non-ohmic composition and method for manufacturing same, unit for cable intermediate connection and unit for cable termination connection |
-
2012
- 2012-03-21 CN CN2012201087225U patent/CN202474799U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611067A (en) * | 2012-03-21 | 2012-07-25 | 哈尔滨理工大学 | High-voltage cable flexible joint with non-linear shielding layers |
| CN102611067B (en) * | 2012-03-21 | 2014-08-20 | 哈尔滨理工大学 | High-voltage cable flexible joint with non-linear shielding layers |
| CN103490351A (en) * | 2013-09-05 | 2014-01-01 | 长园电力技术有限公司 | Manufacturing process of cross-linked polyethylene insulated cable main terminal molding stress control module |
| CN103490351B (en) * | 2013-09-05 | 2016-05-18 | 长园电力技术有限公司 | Cross-linked polyethylene insulated cable main body terminal mould note Stress Control module making technique |
| CN105514892A (en) * | 2016-01-27 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Wall bushing provided with shielding structure |
| KR20200028931A (en) * | 2017-07-13 | 2020-03-17 | 스미토모 덴키 고교 가부시키가이샤 | Non-ohmic composition and method for manufacturing same, unit for cable intermediate connection and unit for cable termination connection |
| CN110915087A (en) * | 2017-07-13 | 2020-03-24 | 住友电气工业株式会社 | Non-ohmic composition, method for producing the same, intermediate cable connection unit, and terminal cable connection unit |
| US10840690B2 (en) | 2017-07-13 | 2020-11-17 | Sumitomo Electric Industries, Ltd. | Non-ohmic composition and method for manufacturing same, cable interconnect unit and cable end-connect unit |
| CN110915087B (en) * | 2017-07-13 | 2021-04-16 | 住友电气工业株式会社 | Non-ohmic composition, method for producing the same, intermediate cable connection unit, and terminal cable connection unit |
| KR102480532B1 (en) * | 2017-07-13 | 2022-12-23 | 스미토모 덴키 고교 가부시키가이샤 | Non-ohmic composition and manufacturing method thereof, unit for cable intermediate connection and unit for cable termination connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121003 Effective date of abandoning: 20140820 |
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| RGAV | Abandon patent right to avoid regrant |