CN103001168A - Prefabricated capacitive type cable accessory - Google Patents
Prefabricated capacitive type cable accessory Download PDFInfo
- Publication number
- CN103001168A CN103001168A CN 201110264552 CN201110264552A CN103001168A CN 103001168 A CN103001168 A CN 103001168A CN 201110264552 CN201110264552 CN 201110264552 CN 201110264552 A CN201110264552 A CN 201110264552A CN 103001168 A CN103001168 A CN 103001168A
- Authority
- CN
- China
- Prior art keywords
- cable
- prefabricated
- stress cone
- core body
- cable accessory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 230000003139 buffering effect Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000872 buffer Substances 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 239000013013 elastic material Substances 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 239000004519 grease Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Cable Accessories (AREA)
Abstract
The invention relates to a prefabricated capacitive type cable accessory and belongs to the field of cable accessories in the high voltage and insulation technology. The prefabricated capacitive type cable accessory comprises a prefabricated capacitor core and a stress cone, media of the prefabricated capacitor core are made of dry insulating materials, the stress cone is made of elastic materials, a conductor of a cable is in conductive connection with a prefabricated capacitor core high-voltage screen, a conductive portion of the elastic stress cone serves as a buffer between the cable and the length direction of a grounding screen portion of the capacitor core, and appropriate insulating substance buffers are used among other portions of the capacitor core and the cable. By means of improvement on connection design of the capacitor core and the stress cone in the cable accessory, the elastic stress cone has a stress dispersion function. Buffering and sealing functions are added to enable the capacitive type cable accessory to be simple and reliable, and on the premise of lowering difficulty in manufacturing of the prefabricated capacitive type cable accessory, the problem of creepage discharge of an insulation combined interface of a geometric electric field stress control cone and the cable accessory is solved by reducing axial field intensity. Therefore, the prefabricated capacitive type cable accessory is applicable to high-voltage-class cables.
Description
Technical field
The present invention relates to a kind of prefabricated capacitance type electric cable accessories, belong to the electric cable accessories field in the high voltage and insulation technology.
Background technology
Although the crosslinked cable annex is various informative, the key problem in technology of all kinds of annexes is the electric field stress control in the insulation system.What geometric type electric field stress control cone adopted is that classical geometry stress cone comes Electric Field Distribution in the control cables annex, and its insulating structure design is reasonable, not affected by extraneous factor, and stability better.In actual application, as long as the geometry of proof stress cone and proof stress cone have enough pressure with cable main insulation combination interface, just can reach the promising result of Electric Field Distribution in the control cables annex long-term effectively, be widely used in 10 kilovolts and above cable line.
The pressure of stress cone and cable main insulation combination interface depends on the tight fit state of annex and cable body.Because inevitably there is manufacture deviation in cable main insulation size, so whether the connection of electric cable accessories design is reliably extremely important.If the pressure of stress cone and cable main insulation combination interface (usually being referred to as grip force) is difficult to be guaranteed, just cause easily the combination interface creeping discharge, usually adopt and smearing at the interface silicone grease to prevent the interface creeping discharge.Yet under operating temperature, along with passage of time, silicone grease progressively moves withered, and creeping discharge hidden danger still exists.Therefore, the research work emphasis of crosslinked cable annex is centering on to adjust with the pressure that keeps for a long time stress cone and cable main insulation combination interface, research always and is substituting the new material of silicone grease with solution creeping discharge problem.
When 275 kilovolts of terminals of exploitation, oil-filled cable capacitor type terminal structure is moved on the crosslinked cable, external 275 kilovolts and above crosslinked cable terminal this structure of more use still up to now, when this prefabricated capacitance type cable termination is installed, the leading core and need to be connected with prefabricated capacitance core body high pressure screen conduction of cable, cable metal shielding need the applied stress cone to conduct electricity with the earthing afterbody of prefabricated capacitance core body to be connected.Simultaneously, because the crosslinked polyetylene insulated coefficient of expansion decuples metal, between crosslinked cable and prefabricated capacitance core body, resilient coating must be arranged, just be unlikely to when cable expands, the capacitance core cubical expansion to be split.So adopt the crosslinked cable annex of traditional oils paper capacitor core body just to adopt the together mode of immersion oil of resilient coating and electric capacity core body.In a word, in principle, although the effect of capacitor type electric cable accessories control electric field is better than stress cone, because it has significantly reduced axial field intensity, manufacturing is upper cumbersome, causes present prefabricated capacitance type electric cable accessories seldom to be used.
Summary of the invention
The object of the invention is to be connected the connection design with stress cone by improving in the electric cable accessories electric capacity core body, make capacitor type electric cable accessories (comprising terminal and joint) simple and reliable, reducing under the prefabricated capacitance type electric cable accessories manufacture difficulty prerequisite, solve the creeping discharge problem at geometric type electric field stress control cone electric cable accessories insulated combination interface, be applicable to the voltage levels cable.
Prefabricated capacitance type electric cable accessories provided by the invention, mainly comprise prefabricated capacitance core body and stress cone, the medium of prefabricated capacitance core body adopts the dry insulation material to make, stress cone adopts elastomeric material to make, the core of leading of cable is connected with prefabricated capacitance core body high pressure screen conduction, use the current-carrying part of elastic stress cone as the partial-length of electric capacity core body earthing and the buffering between cable, select suitable megohmite insulant buffering between electric capacity core body other parts and cable, the elastic stress cone has the function of stress evacuating, has simultaneously the function of buffering, sealing.
The advantage of above-mentioned prefabricated capacitance type electric cable accessories is: principle is advanced, simple in structure, volume is little, lightweight, simple installation; Can select suitable megohmite insulant buffering between electric capacity core body other parts and the cable insulation, have higher versatility; If the buffering insulant adopts solid between electric capacity core body other parts and the cable insulation, all advantages of dry core cable annex have just been arranged: without oil, without gas, without porcelain, explosion-proof, environmental protection, the few maintenance.
Description of drawings
It is that prefabricated capacitance type electric cable accessories of the present invention is wherein a kind of that the prefabricated capacitance type contains insulation filling agent outdoor cable terminal, illustrates as example
Accompanying drawing 1 contains the cutaway view of insulation filling agent outdoor cable terminal for the prefabricated capacitance type:
Wherein:
(1) is the electric capacity hollow bushing, refer to before annex dispatches from the factory by end flange (11), electric capacity core body (12), full skirt (13), base board flange (14) assembling all-in-one-piece prefabricated component, electric capacity core body (12) one end high pressure screen is connected with end flange (11) conduction, will be connected with the cable shield conduction when other end earthing of electric capacity core body (12) is installed.
(2) be outlet rod;
(3) be top cover;
(4) be equal pressure cap;
(5) megohmite insulant (insulation filling agent) of buffering;
(6) be stress cone;
(7) be tail pipe.
Embodiment
1 couple of the present invention is described in further details below in conjunction with accompanying drawing.
It is as follows that above-mentioned prefabricated capacitance type contains the mounting means of insulation filling agent outdoor cable terminal:
1) pre-electric heating cable and alignment cable;
2) stripping shield semiconductors and cable insulation are processed;
3) crimping outlet rod (2) and tail pipe (7) is enclosed within cable below;
4) stress cone (6) is installed in the insulation shield place;
5) it is upper and fix with top cover (3) and tail pipe (7) electric capacity hollow bushing (1) to be enclosed within stress cone (6);
6) base board flange (14) and the cable with electric capacity hollow bushing (1) is fixed on the support;
7) open top cover (3) and fill out the megohmite insulant (insulation filling agent) (5) of punching buffering;
8) equal pressure cap (4) is fixed and installed to top cover (3).
Above-described embodiment and is not limitation of the present invention only for explanation be convenient to understand the present invention, and protection scope of the present invention should be limited by each claim.
Claims (5)
1. a prefabricated capacitance type electric cable accessories (comprising terminal and joint), it is characterized in that: also comprise stress cone (6) and electric capacity core body (12), stress cone (6) adopts elastomeric material to make, the capacitor dielectric of electric capacity core body (12) uses dry insulation, the current-carrying part of stress cone (6) is as the earthing partial-length of electric capacity core body (12) and the buffering between cable, select megohmite insulant (5) buffering between electric capacity core body (12) other parts and cable, stress cone (6) has the function of stress evacuating, has simultaneously buffering, the function of sealing.
2. prefabricated capacitance type electric cable accessories as claimed in claim 1 is characterized in that: the capacitor dielectric of electric capacity core body (12) uses dry insulation, and it can be elastomer.
3. prefabricated capacitance type electric cable accessories as claimed in claim 1, it is characterized in that: the current-carrying part of stress cone (6) is installed between the earthing partial-length and cable of electric capacity core body (12).
4. prefabricated capacitance type electric cable accessories as claimed in claim 1, it is characterized in that: the current-carrying part of stress cone (6) is installed between the earthing partial-length and cable of electric capacity core body (12), stress cone (6) has the function of stress evacuating, has simultaneously the function of buffering, sealing.
5. prefabricated capacitance type electric cable accessories as claimed in claim 1, it is characterized in that: stress cone (6) and electric capacity core body (12), and the megohmite insulant that cushions between electric capacity core body other parts and the cable insulation (5) can combination in any or jointly link together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110264552 CN103001168A (en) | 2011-09-08 | 2011-09-08 | Prefabricated capacitive type cable accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110264552 CN103001168A (en) | 2011-09-08 | 2011-09-08 | Prefabricated capacitive type cable accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103001168A true CN103001168A (en) | 2013-03-27 |
Family
ID=47929445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110264552 Pending CN103001168A (en) | 2011-09-08 | 2011-09-08 | Prefabricated capacitive type cable accessory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103001168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746035A (en) * | 2020-05-28 | 2021-12-03 | 哈尔滨理工大学 | Method for improving interface voltage resistance of prefabricated cable accessory rubber stress control body |
-
2011
- 2011-09-08 CN CN 201110264552 patent/CN103001168A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746035A (en) * | 2020-05-28 | 2021-12-03 | 哈尔滨理工大学 | Method for improving interface voltage resistance of prefabricated cable accessory rubber stress control body |
| CN113746035B (en) * | 2020-05-28 | 2022-12-09 | 哈尔滨理工大学 | Method for improving interface voltage resistance of prefabricated cable accessory rubber stress control body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130327 |