CN107634496A - A kind of high voltage direct current cable line terminal - Google Patents
A kind of high voltage direct current cable line terminal Download PDFInfo
- Publication number
- CN107634496A CN107634496A CN201710645065.5A CN201710645065A CN107634496A CN 107634496 A CN107634496 A CN 107634496A CN 201710645065 A CN201710645065 A CN 201710645065A CN 107634496 A CN107634496 A CN 107634496A
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- China
- Prior art keywords
- direct current
- high voltage
- voltage direct
- line terminal
- cable line
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Abstract
The invention provides a kind of high voltage direct current cable line terminal, the terminal includes cable, insulating sleeve and the sheath of concentric setting；The cable includes the insulating barrier outside core and core, and the insulation shielding end of the insulating barrier is provided with stress cone, stress cone support tube is set outside the stress cone；Silica hydrogel is filled in the inside of the insulating sleeve, and connector and cover plate are set respectively above and below the insulating sleeve；Cable run terminal provided by the invention, its is simple in construction, No leakage, easy for installation；Insulating oil is substituted as the dielectric of cable termination by the use of Silica hydrogel, and its Applicable temperature scope is wide, and dielectric strength is high, has excellent wetting property, deformability energy and heat aging performance.
Description
Technical field
The invention belongs to electric cable fitting field, and in particular to a kind of high voltage direct current cable line terminal.
Background technology
Cable termination is in the end of whole cable system, is cable and the tie point of power system.But cable end
Insulation system easily changes and causes internal field too high, and the main function of terminal is exactly the electric field point for optimizing cable end
Cloth, meet insulating requirements.
Existing Voltage Cable Lines Construction terminal has European and Japanese two kinds of structures.
European and Japanese cable run terminal typically all uses the oil-filled type structure of sleeve pipe, the various shakinesses during use
It is all the major reason for triggering fluid insulation oil-insulation defect to determine factor；It is embodied in：Terminal oil leak, needs regular check to mend
Fill；Insulating oil is hygroscopic to make moist, and influences its dielectric properties；Insulating oil is in the course of the work for a long time by ultraviolet and electric current
Effect can accelerate degradation with aging, can equally influence its dielectric properties；Easily it is swelled with the stress cone of oily Long Term Contact, causes its stress
Relaxation, material premature aging, the normal operation to cable termination, which is safeguarded, brings difficulty.
Therefore, it is necessary to be improved to the dielectric of existing cable run terminal filling, there is provided a kind of performance is more
Excellent cable run terminal meets the needs of prior art.
The content of the invention
In order to meet the needs of prior art, the present invention provides a kind of high voltage direct current cable line terminal, and its is simple in construction,
No leakage, it is easy for installation；Insulating oil is substituted by the use of Silica hydrogel be used as the dielectric of cable termination, Applicable temperature in cable termination
Scope is wide, and dielectric strength is high, and wetting property, changeability performance and heat aging performance are excellent.
The present invention is achieved through the following technical solutions：
A kind of high voltage direct current cable line terminal, the terminal include cable, insulating sleeve and the sheath of concentric setting；
The cable includes the insulating barrier outside core and core, and the insulation shielding end of the insulating barrier is provided with stress cone, the stress
Cone is outside to set stress cone support tube；The inside filling Silica hydrogel of the insulating sleeve, above and below the insulating sleeve
Connector and cover plate are set respectively.
Preferably, the connector is divided into upper connector and lower connector, is crimped on the upper end of insulating sleeve respectively with
End.
Preferably, the packed height of the Silica hydrogel is more than the height of stress cone, and packing volume is not more than insulation sleeve body
Long-pending 3/4ths.
Preferably, the sheath wraps around the raised insulator of umbrella, and the insulator is electroceramics or composite insulator.
Preferably, the cover plate is divided into upper cover plate and lower cover, and equivalent is symmetrical arranged circle respectively for upper cover plate and lower cover
Grading ring.
Preferably, the circular grading ring and cover plate are bolted, between the circular grading ring by copper bar or
Aluminium row's connection.
Preferably, the upper connector both sides are symmetrical arranged flap grading ring, the uniform connection gold utensil of flap grading ring
Outside electric field.
Preferably, the insulating sleeve is from oxygen glass fiber reinforcement sleeve pipe, porcelain bushing shell, silicone rubber sleeve, the poly- second of crosslinking
The one kind chosen in alkene sleeve pipe and epoxy resin bushing.
Preferably, the vertical section flare of the stress cone from top to bottom；The stress cone is held tightly by being interference fitted
The insulation shielding end of insulating barrier.
Preferably, the composite that the stress cone is made up of electrically insulating silicone rubber, conductive silicon rubber and nano barium carbonate
Form.
Preferably, core perforation, the core perforation and insulating sleeve are formed on the upper connector and lower connector
Port contact face between be provided with sealing ring.
Preferably, the upper cover plate and lower cover are fixed on insulating sleeve top and bottom by connector respectively, described
Core perforation is formed on upper cover plate and lower cover.
Compared with immediate prior art, the present invention has the advantages that：
1st, technical scheme provided by the invention, using Silica hydrogel as the dielectric of cable termination, long period of soaking is avoided
The drawbacks of stress cone flexibility decrease in insulating oil causes interface breakdown voltage to decline.
2nd, the present invention uses dielectric of the Silica hydrogel as cable termination, and its heat aging performance is good, Applicable temperature model
Enclose extensively, a kind of sticky soft elastomer state is all rendered as within the scope of very wide temperature；With good deformability, as
The packing material of insulating sleeve, it can matched in excellence or beauty caused by compensation temperature lifting in Volume Changes with insulating oil；Dielectric strength is high, no
Less than the dielectric strength of other materials contact interface in insulating sleeve.
3rd, technical scheme provided by the invention, grading ring is set in cable run terminal, peripheral, advantageously reduces metal edges
Electric field distortion around angle, so as to suppress the generation of corona discharge；Be advantageous to distribution, the external insulation of the sub- surface field of uniform insulation
The raising of intensity.
4th, cable run terminal provided by the invention, its is simple in construction, in light weight, and No leakage is non-maintaining, easy for installation,
Explosion-proof performance is excellent.
Brief description of the drawings
Fig. 1 is a kind of diagrammatic cross-section of high voltage direct current cable line terminal suitable for ± 320KV provided by the invention；
Wherein, 1- cores, 2- insulating barriers, 3- insulating sleeves, 4- Silica hydrogels, 5- stress cones, 6- upper cover plates, 7- lower covers,
8- sheaths, 9- upper flanges, 10- lower flanges, 11- circle grading rings, 12- flap grading rings, 13- stress cone support tubes, 14- insulation
Shield end.
Embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings：
It is applied to ± 320KV high voltage direct current cables line terminal as shown in figure 1, a kind of, including the cable of concentric setting,
Insulating sleeve 3 and sheath 8；The cable includes the insulating barrier 2 outside core 1 and core 1, the insulation shielding of the insulating barrier 2
End 14 is provided with stress cone 5, and the outside of stress cone 5 sets stress cone support tube 13；The inside filling silicon of the insulating sleeve 3 coagulates
Glue 4, flange and cover plate are set respectively above and below the insulating sleeve 3；
Packed height of the Silica hydrogel 4 in insulating sleeve 3 is more than the height of stress cone 5, and packing volume is no more than exhausted
3/4ths of the volume of edge sleeve pipe 3；
Preferably, filled in insulating sleeve 3 with liquid silicone gel 4, packing volume for the volume of insulating sleeve 3 eight/
Five, i.e., horizontal line position in figure；After the completion of liquid silicone gel 4 is filled, can gradually be cured to immobilising state, curing reaction be
Carry out at room temperature, do not release low-molecular material in cross-linking process is solidified, do not generate heat, do not shrink；Silica hydrogel after solidification is nontoxic, tool
Whether there is constancy, remarkable hydrolytic stability, good low compressive deformation, low flammability, its curingprocess rate usable temp or
Variable curing agent ratio controls, and γ-aminopropyltrimethoxysilane, N- phenyl-γ-aminopropyl can be selected in the curing agent
One or more in trimethoxy silane and γ-ureido-propyl trimethoxy silane.
The sheath 8 wraps around the raised insulator of umbrella, and the insulator is electroceramics or composite insulator；
Wherein, the effect of insulator can also adjust creep age distance in addition to mechanical support；The composite insulator of use has
The advantages that high mechanical strength, electrical strength are high and in light weight.
The flange is divided into upper flange 9 and lower flange 10, is crimped on the top and bottom of insulating sleeve 3 respectively；
The cover plate is divided into upper cover plate 6 and lower cover 7, and equivalent is symmetrical arranged and circular pressed respectively for upper cover plate 6 and lower cover 7
Ring 11.
The circular grading ring 11 and cover plate are bolted, and are arranged between the circular grading ring 11 by copper bar or aluminium
Connection.
The both sides of upper flange 9 are symmetrical arranged flap grading ring 12, outside the 12 uniform connection gold utensil of flap grading ring
Electric field；
The grading ring not only can effectively reduce the electric field distortion around metal corner, so as to suppress the hair of corona discharge
It is raw；And with the sub- surface electric field distribution of uniform insulation and external insulating strength can be improved.
The insulating sleeve 3 is from oxygen glass fiber reinforcement sleeve pipe, porcelain bushing shell, silicone rubber sleeve, crosslinked polyethylene sleeve pipe
With the one kind chosen in epoxy resin bushing.
The vertical section flare of the stress cone 5 from top to bottom, it holds the insulation screen of insulating barrier tightly by being interference fitted
End 14 is covered, can make it that the Electric Field Distribution for shielding end is uniform, so as to substantially increase cable termination integral insulation intensity；In stress
The outside of cone 5 is provided with stress cone support tube 13, can effectively reduce the degree of injury of stress cone 5, improve its service life.
The composite that the stress cone 5 is made up of electrically insulating silicone rubber, conductive silicon rubber and nano barium carbonate is formed, in
Nano barium carbonate is added in composite, the dielectric constant of stress cone 5 can be greatly improved.
Core perforation is formed on the upper flange 9 and lower flange 10, the core perforation and the port of insulating sleeve 3 connect
Sealing ring is provided between contacting surface.
The upper cover plate 6 and lower cover 7 are fixed on the upper end of insulating sleeve 3 with by upper flange 9 and lower flange 10 respectively
Hold, core perforation is formed in the upper and lower cover plates.
The performance indications for the dielectric Silica hydrogel that table 1 uses for the present invention：
| Numbering | Project | Performance |
| 1 | Outward appearance | Water white transparency |
| 2 | Density, g/cm3(25℃) | 0.98 |
| 3 | Viscosity, mPa.s (25 DEG C) | 1000±50 |
| 4 | Cone penetration, 0.1mm | 270 |
| 5 | Volatile matter (%) | 0.020 |
| 6 | Electrical insulation strength, KV. (mm)-1 | 22.6 |
| 7 | Specific insulation, Ω .m (25 DEG C) | 6.1×1013 |
| 8 | Dielectric constant | 2.9 |
| 9 | Applicable temperature (DEG C) | -40-150 |
| 10 | Breakdown voltage, KV/mn | 23 |
| 11 | Elongation (%) | 130 |
| 12 | Breaking strength (Kg/cm2) | 45 |
| 13 | Wellability | It is excellent |
| 14 | Changeability | It is excellent |
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although with reference to above-described embodiment pair
The present invention is described in detail, and those of ordinary skill in the art can still enter to the embodiment of the present invention
Row modification or equivalent substitution, these are applying without departing from any modification of spirit and scope of the invention or equivalent substitution
Within pending claims of the invention.
Claims (12)
- A kind of 1. high voltage direct current cable line terminal, it is characterised in that the terminal include set gradually from inside to outside cable, Insulating sleeve and sheath；The cable includes the insulating barrier outside core and core, and the insulation shielding end of the insulating barrier is set Stress cone, the stress cone outside set stress cone support tube；The inside filling Silica hydrogel of the insulating sleeve, the insulation sleeve Connector and cover plate are set respectively above and below pipe.
- 2. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the connector is divided into company Fitting and lower connector, the top and bottom of insulating sleeve are crimped on respectively.
- 3. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the filling of the Silica hydrogel is high Degree is more than the height of stress cone, 3/4ths of packing volume no more than insulating sleeve volume.
- 4. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the sheath wraps around umbrella The raised insulator of shape, the insulator is electroceramics or composite insulator.
- 5. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the cover plate is divided into upper cover plate And lower cover, equivalent is symmetrical arranged circular grading ring respectively for upper cover plate and lower cover.
- 6. a kind of high voltage direct current cable line terminal as claimed in claim 5, it is characterised in that the circular grading ring and lid Plate is bolted, and passes through copper bar or aluminium row's connection between the circular grading ring.
- A kind of 7. high voltage direct current cable line terminal as claimed in claim 2, it is characterised in that the upper connector both sides pair Title is provided with flap grading ring, the electric field outside the uniform connection gold utensil of flap grading ring.
- 8. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the insulating sleeve is from oxygen The one kind chosen in glass fiber reinforcement sleeve pipe, porcelain bushing shell, silicone rubber sleeve, crosslinked polyethylene sleeve pipe and epoxy resin bushing.
- 9. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the stress cone is from top to bottom Vertical section flare, the stress cone pass through be interference fitted hold tightly insulating barrier insulation shielding end.
- 10. a kind of high voltage direct current cable line terminal as claimed in claim 1, it is characterised in that the stress cone is by exhausted The composite of edge silicon rubber, conductive silicon rubber and nano barium carbonate composition is formed.
- 11. a kind of high voltage direct current cable line terminal as claimed in claim 2, it is characterised in that the upper connector is with Core perforation is formed on connector, sealing ring is provided between the core perforation and the port contact face of insulating sleeve.
- 12. a kind of high voltage direct current cable line terminal as claimed in claim 5, it is characterised in that the upper cover plate and lower cover Plate is fixed on insulating sleeve top and bottom by connector respectively, and core perforation is formed on the upper cover plate and lower cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710645065.5A CN107634496A (en) | 2017-08-01 | 2017-08-01 | A kind of high voltage direct current cable line terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710645065.5A CN107634496A (en) | 2017-08-01 | 2017-08-01 | A kind of high voltage direct current cable line terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107634496A true CN107634496A (en) | 2018-01-26 |
Family
ID=61099387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710645065.5A Pending CN107634496A (en) | 2017-08-01 | 2017-08-01 | A kind of high voltage direct current cable line terminal |
Country Status (1)
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| CN (1) | CN107634496A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031731A (en) * | 2019-04-10 | 2019-07-19 | 上海交通大学 | Puncture test macro and method for cables with extruded insulation direct current |
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| JP4751918B2 (en) * | 2008-07-03 | 2011-08-17 | 株式会社エクシム | Air termination connection and assembly method of air termination connection |
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| CN102790371A (en) * | 2011-05-20 | 2012-11-21 | Abb技术有限公司 | A cable termination device, a method for prefabricating a cable termination device and a method for achieving a cable termination |
| CN102790372A (en) * | 2011-05-20 | 2012-11-21 | Abb技术有限公司 | A cable termination device, a method for prefabricating a cable termination device and a method for achieving a cable termination |
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| CN203871833U (en) * | 2014-05-06 | 2014-10-08 | 昆山达功电子有限公司 | Superconducting cable insulation connecting pipe |
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| CN106469594A (en) * | 2015-08-19 | 2017-03-01 | 北京天威瑞恒高压套管有限公司 | High voltage insulation structure, cable termination, bus, bushing and bushing shell for transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031731A (en) * | 2019-04-10 | 2019-07-19 | 上海交通大学 | Puncture test macro and method for cables with extruded insulation direct current |
| CN110031731B (en) * | 2019-04-10 | 2021-06-11 | 上海交通大学 | System and method for testing direct current breakdown of extruded insulated cable |
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Application publication date: 20180126 |