CN203326543U - Prefabricated terminal of flexible dc distribution cable - Google Patents
Prefabricated terminal of flexible dc distribution cable Download PDFInfo
- Publication number
- CN203326543U CN203326543U CN2013204657634U CN201320465763U CN203326543U CN 203326543 U CN203326543 U CN 203326543U CN 2013204657634 U CN2013204657634 U CN 2013204657634U CN 201320465763 U CN201320465763 U CN 201320465763U CN 203326543 U CN203326543 U CN 203326543U
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- Prior art keywords
- direct current
- current distribution
- distribution cable
- flexible direct
- prefabricated terminal
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Abstract
The utility model provides a prefabricated terminal of a flexible dc distribution cable. The prefabricated terminal comprises an enhanced insulating layer and a stress core, and umbrella skirts at the surface of the insulating layer include large and small umbrellas distributed alternatively. The stress core is used to disperse the electric field concentrated at the tail end of the cable, and silicone rubber is used as insulating material, so that performances as high temperature resistance, high voltage resistance, anticorrosion, flame retardation and environmental protection can be ensured; the large and small umbrellas are distributed at the insulating surface, thereby effectively improving the creepage distance and antifouling capability; and thus, operational stability and safety of a flexible dc distribution circuit are ensured.
Description
Technical field
The utility model relates to a kind of direct current annex, relates in particular to the DC distribution cable termination.
Background technology
Along with the Chinese national economy development, the people improve constantly need for electricity, and Technology of HVDC based Voltage Source Converter arises at the historic moment and is subject to extensive concern, have a large amount of successful operating experience both at home and abroad, and the flexible direct current distribution technique is still in the starting stage.
According to a large amount of both at home and abroad documents, put down in writing and evidence: easy accumulation space electric charge between the interface of dielectric inside and reinforced insulation and cable insulation under direct current, thereby cause electric field distortion, final formation punctures, therefore most direct current annex adopts ethylene-propylene rubber as insulating material, for improving internal electric field, the stress cone end all adopts arc transition simultaneously.
Problem and the defect of its existence are:
1) adopt ethylene-propylene rubber to make the insulating material of direct current cables terminal, during the ethylene-propylene rubber burning, can volatilize toxic gas, easily human body is damaged during for urban power distribution network, simultaneously contaminated environment.
2) under DC environment, terminal external surface, because electrostatic interaction is easily creepage, if stress cone adopts the arc section transition, will strengthen the electric field of the corresponding insulated outer surface of stress cone, more easily forms outer the sudden strain of a muscle.
The utility model content
In order to solve problem in prior art, the utility model provides a kind of flexible direct current distribution cable prefabricated terminal.
A kind of flexible direct current distribution cable prefabricated terminal, it comprises reinforced insulation layer and stress cone, the surface of insulating layer cluster parachute adopts large umbellule to distribute alternately.
As further improvement of the utility model, described surface of insulating layer cluster parachute is that a gamp and a umbellule distribute alternately.
As further improvement of the utility model, described reinforced insulation layer is silastic-layer.
As further improvement of the utility model, described stress cone end adopts the transient mode of arc section and horizontal segment combination.
As further improvement of the utility model, the horizontal segment of described stress cone is parallel with intermediate cable.
As further improvement of the utility model, flexible direct current distribution cable prefabricated terminal is ± 15kV flexible direct current distribution line.
The beneficial effects of the utility model are:
Existing direct current cables annex is because problems with space charge all adopts ethylene-propylene rubber as insulating material, but according to domestic and international many document records, problems with space charge not obvious under low-voltage, therefore from environmental protection and dielectric strength, consider, adopt silicon rubber as insulating material, the advantages such as silicon rubber has that dielectric strength is high, anticorrosion, high temperature resistant, anti-oxidant, fire-retardant, waterproof, discharge without toxic gas during burning, environment friendly and pollution-free.
The stress cone end adopts the arc section transition really can effectively reduce the inboard field intensity of stress cone, yet also can increase the insulated outer surface field intensity, under DC environment, more easily form the directional migration of electronics, the surface creepage problem is more serious, and adopted the transient mode of arc section and horizontal segment combination, can greatly reduce the insulated outer surface field intensity under the prerequisite that does not increase insulation thickness.
Flexible direct current distribution cable prefabricated terminal stress cone adopts the structure of circular arc and horizontal segment combination, has both reduced the stress cone field intensity of inboard (near the cable direction), simultaneously, has suppressed the electric field of insulated outer surface.
The accompanying drawing explanation
Fig. 1 is prior art stress cone structural representation;
Fig. 2 is the utility model flexible direct current distribution stress cone structural representation;
Fig. 3 is the utility model flexible direct current distribution cable prefabricated terminal structure figure.
In figure, each component names is as follows:
Arc section stress cone 10, horizontal segment stress cone 20, cable 1, reinforced insulation (silicon rubber) 2, stress cone 3.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
A kind of flexible direct current distribution cable prefabricated terminal, it comprises reinforced insulation and stress cone two large divisions, the insulating surface cluster parachute adopts large umbellule to distribute alternately.Preferably a gamp and a umbellule distribute alternately, and the insulating material of described reinforced insulation is silicon rubber.Described stress cone end adopts the transient mode of arc section and horizontal segment combination.
Be applied to ± 15kV of the utility model product technology flexible direct current distribution line, for flexible direct current distribution cable line end and other equipment connections, solve line end and partly lead the electric field concentration problem of incision position.
The mode of production of the present utility model is prefabricated, constructability and installation; Insulating material is silicon rubber, there is the advantages such as high temperature resistant, high pressure resistant, anticorrosion, fire-retardant, environmental protection, insulated outer surface adopts the distribution mode that large umbellule is alternate, increase creepage distance and strengthen anti-filthy ability, and suppress the terminal end surface electric field by improving stress cone, disperse the concentrated electric field of cable end piece by stress cone, guarantee cable termination safety, stable operation.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (6)
1. a flexible direct current distribution cable prefabricated terminal, it is characterized in that: it comprises reinforced insulation layer and stress cone, the surface of insulating layer cluster parachute adopts large umbellule to distribute alternately.
2. flexible direct current distribution cable prefabricated terminal according to claim 1, it is characterized in that: described surface of insulating layer cluster parachute is that a gamp and a umbellule distribute alternately.
3. flexible direct current distribution cable prefabricated terminal according to claim 1, it is characterized in that: described reinforced insulation layer is silastic-layer.
4. flexible direct current distribution cable prefabricated terminal according to claim 1, is characterized in that: the transient mode of described stress cone end employing arc section and horizontal segment combination.
5. flexible direct current distribution cable prefabricated terminal according to claim 4, it is characterized in that: the horizontal segment of described stress cone is parallel with intermediate cable.
6. flexible direct current distribution cable prefabricated terminal according to claim 1 is characterized in that: flexible direct current distribution cable prefabricated terminal is ± 15kV flexible direct current distribution line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204657634U CN203326543U (en) | 2013-07-31 | 2013-07-31 | Prefabricated terminal of flexible dc distribution cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204657634U CN203326543U (en) | 2013-07-31 | 2013-07-31 | Prefabricated terminal of flexible dc distribution cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326543U true CN203326543U (en) | 2013-12-04 |
Family
ID=49665837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204657634U Expired - Lifetime CN203326543U (en) | 2013-07-31 | 2013-07-31 | Prefabricated terminal of flexible dc distribution cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203326543U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099826A (en) * | 2016-08-30 | 2016-11-09 | 南京南瑞集团公司 | Extruded type flexible direct current cable termination stress cone structure |
| CN106329455A (en) * | 2016-08-30 | 2017-01-11 | 南京南瑞集团公司 | Prefabricated-type flexible DC cable terminal stress cone structure |
| CN106451316A (en) * | 2016-11-28 | 2017-02-22 | 南京南瑞集团公司 | Mould casting type flexible direct-current cable soft joint reaction force cone structure designing method |
-
2013
- 2013-07-31 CN CN2013204657634U patent/CN203326543U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099826A (en) * | 2016-08-30 | 2016-11-09 | 南京南瑞集团公司 | Extruded type flexible direct current cable termination stress cone structure |
| CN106329455A (en) * | 2016-08-30 | 2017-01-11 | 南京南瑞集团公司 | Prefabricated-type flexible DC cable terminal stress cone structure |
| CN106329455B (en) * | 2016-08-30 | 2018-06-01 | 南京南瑞集团公司 | Prefabricated flexible direct current cable termination stress wimble structure |
| CN106451316A (en) * | 2016-11-28 | 2017-02-22 | 南京南瑞集团公司 | Mould casting type flexible direct-current cable soft joint reaction force cone structure designing method |
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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 |
Granted publication date: 20131204 |
|
| CX01 | Expiry of patent term |