CN110912071A - Multi-branch joint fixing support for high-voltage power cable with reliable performance - Google Patents
Multi-branch joint fixing support for high-voltage power cable with reliable performance Download PDFInfo
- Publication number
- CN110912071A CN110912071A CN201811127517.1A CN201811127517A CN110912071A CN 110912071 A CN110912071 A CN 110912071A CN 201811127517 A CN201811127517 A CN 201811127517A CN 110912071 A CN110912071 A CN 110912071A
- Authority
- CN
- China
- Prior art keywords
- insulating
- power cable
- shell
- sleeve
- voltage power
- 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
- 239000011347 resin Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 12
- 238000009434 installation Methods 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
Landscapes
- Cable Accessories (AREA)
Abstract
The invention relates to the installation and fixation of cable joints when a plurality of high-voltage power cables are tapped, and the structure is that at least three dry capacitance type insulating sleeves are respectively penetrated into holes on the side wall of a shell, one ends of the sleeves are connected together, and resin is poured for solidification and is fixedly sealed into a whole, the insulation between a high-voltage electrified part and the grounding shell is born by the dry capacitance type insulating sleeve with higher insulation strength, the traditional semiconductor rubber stress cone structure is abandoned, and the high-voltage power cables have better insulation strength and mechanical strength.
Description
The technical field is as follows:
the invention relates to installation and fixation of cable connectors when a plurality of high-voltage power cables are tapped.
Background art:
with the rapid development of cities, high-power transmission to cities by using high-voltage power cables is more and more common, and the power transmission by using 110kv and 220kv high-voltage cables in power systems becomes a mainstream between urban areas. When the power cable is laid and installed, a high-voltage cable is often required to be branched into two, three or more branches. As is well known, the manufacture and field installation of the conventional high voltage power cable connectors are technically very high and are expensive, and even though the simplest one-to-one intermediate connector is used, an operator must strictly operate the connectors according to the construction process, and the two-to-one or three-to-one tapping structure has more technical difficulty and is also extremely expensive. For the one-to-two structure of the power cable connector of 110kv and above, the structure can not be produced and manufactured by oneself in China at the early period of the century, and needs to be imported from Germany, the structure is inflatable, the price is very expensive, and the price of one set needs more than three million yuan; in recent years, some manufacturers in China have developed cable connectors with a structure of connecting 110kv power cable connectors to two cables, also called "Y" branch connectors to replace import connectors, so that the cost of the connectors is greatly reduced, and a typical case is the utility model patent application 200820159084.3. However, in the structure of the Y-shaped branch joint, when the high-voltage live conductor rod penetrates out of the metal grounding shell, the electric field intensity at the periphery of the conductive rod penetrating out of the metal grounding shell is very high, in this case, a stress cone made of a semiconductor rubber material is simply arranged between the conductive rod and the grounding shell so as to improve the problem of overhigh field intensity, the designed structure has the functions of reducing local field intensity to a certain degree and uniformly distributing voltage, and when overvoltage occurs during the operation of a cable, the insulation strength of the insulation designed structure is insufficient, and the insulation of the cable joint is easily broken down. Potential safety hazards exist.
The invention content is as follows:
the invention aims to provide a multi-branch joint fixing support for a high-voltage power cable, which is reliable in performance and solves the problem of safe operation of the multi-branch joint of the high-voltage power cable.
In order to achieve the purpose of the invention, the multi-branch joint fixing support for the power cable with reliable performance, provided by the invention, is characterized in that at least three prefabricated dry-type capacitance type insulating sleeves are respectively penetrated through openings on the side wall of a shell, one ends of conducting rods of the insulating sleeves are connected together through an electrical connecting piece, the insulating sleeves are fixed with the shell through bolts by sleeve flanges, the tail screen of a capacitance screen of each insulating sleeve is led out to be electrically connected with the sleeve flanges, the inner cavity of the shell is poured and cured by sealing resin, and the insulating sleeves and the electrical connecting piece are sealed into a whole to form a main body of the multi-branch joint fixing support; one end of the insulating sleeve is provided with a contact seat which is electrically connected with the power cable so as to be reliably and electrically connected with the power cable; the end of the insulating sleeve is provided with a plurality of uniformly distributed screw holes so as to fix the power cable.
The outer surface of the part, which extends out of the shell of the insulating sleeve, is provided with a plurality of umbrella skirts made of insulating materials so as to increase the insulating creepage distance from the high-voltage electrified part to the grounding shell.
According to the technical scheme, the multi-branch joint fixing support for the high-voltage power cable with reliable performance adopts the prefabricated high-insulation-strength dry-type capacitance-type insulation sleeve for insulation between the high-voltage electrified part and the grounding shell, the insulation strength and the bending tensile strength of the multi-branch joint fixing support are superior to those of a traditional semiconductor rubber stress cone structure, the traditional structure adopting insulating oil and insulating gas as main insulation is abandoned, various problems caused by leakage are fundamentally solved, the performance is reliable, and maintenance-free performance can be realized.
In conclusion, the multi-branch joint fixing support for the high-voltage power cable has the advantages of high insulation strength, excellent bending and tensile properties, convenience in field construction and reliable performance.
Description of the drawings:
the attached drawing is a structural schematic diagram of the invention
In the figure: 1. screw hole 2, contact seat 3, umbrella skirt 4, dry type capacitance type insulation sleeve 5, capacitance screen 6, sleeve flange 7, shell 8, sleeve conductive rod 9, electrical connecting piece 10, resin for solid encapsulation
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings show a schematic structure of a one-by-two scheme, and the protection scope of the present invention is not limited to the embodiments.
As shown in the figure, the side wall of a shell 7 is respectively provided with a hole for penetrating at least three conducting rods 8 of an insulating sleeve 4 of a prefabricated dry-type capacitance type insulating sleeve 4, one end of each conducting rod is connected together by an electric connecting piece 9, the insulating sleeve 4 is fixed with the shell 7 by a sleeve flange 6 through a bolt, the tail screen of a capacitance screen 5 of the insulating sleeve 4 is led out to be electrically connected with the sleeve flange 6, the inner cavity of the shell 7 is poured and cured by a sealing resin 10, and the insulating sleeve 4 and the electric connecting piece are sealed into a whole to form a multi-branch joint fixing support; one end of the insulating sleeve 4 is provided with a contact base 2 electrically connected with the power cable so as to be reliably electrically connected with the power cable. The end of the insulating sleeve 4 is provided with a plurality of uniformly distributed screw holes 1 so as to fix the power cable. The outer surface of the part of the shell 7 of the insulating sleeve 4, which extends out, is provided with a plurality of sheds 3 made of insulating materials so as to increase the insulating creepage distance from the high-voltage electrified part to the grounding shell 7.
Claims (2)
1. A multi-branch joint fixing support for a high-voltage power cable with reliable performance is characterized in that at least three prefabricated dry-type capacitive insulating sleeves are respectively penetrated through holes in the side wall of a shell, one ends of conducting rods of the insulating sleeves are connected together through an electrical connecting piece, the insulating sleeves are fixed with the shell through a sleeve flange through bolts, the tail screen of a capacitive screen of each insulating sleeve is led out to be electrically connected with the sleeve flange, and an inner cavity of the shell is cast and cured by sealing resin to fixedly seal the insulating sleeves and the electrical connecting piece into a whole; one end of the insulating sleeve is provided with a contact seat electrically connected with the power cable, and the end part of the insulating sleeve is provided with a plurality of uniformly distributed screw holes.
2. The multi-branch joint holder according to claim 1, wherein the outer surface of the outer projecting portion of the housing of the insulating sleeve is provided with a plurality of sheds made of an insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127517.1A CN110912071A (en) | 2018-09-14 | 2018-09-14 | Multi-branch joint fixing support for high-voltage power cable with reliable performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127517.1A CN110912071A (en) | 2018-09-14 | 2018-09-14 | Multi-branch joint fixing support for high-voltage power cable with reliable performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110912071A true CN110912071A (en) | 2020-03-24 |
Family
ID=69813088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811127517.1A Pending CN110912071A (en) | 2018-09-14 | 2018-09-14 | Multi-branch joint fixing support for high-voltage power cable with reliable performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110912071A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670737A (en) * | 2020-12-17 | 2021-04-16 | 山东辰祥电气设备有限公司 | Porous elbow type sleeve, manufacturing method thereof and casting mold |
-
2018
- 2018-09-14 CN CN201811127517.1A patent/CN110912071A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670737A (en) * | 2020-12-17 | 2021-04-16 | 山东辰祥电气设备有限公司 | Porous elbow type sleeve, manufacturing method thereof and casting mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200324 |