WO2021188010A1 - Кабелепровод - Google Patents
Кабелепровод Download PDFInfo
- Publication number
- WO2021188010A1 WO2021188010A1 PCT/RU2020/050346 RU2020050346W WO2021188010A1 WO 2021188010 A1 WO2021188010 A1 WO 2021188010A1 RU 2020050346 W RU2020050346 W RU 2020050346W WO 2021188010 A1 WO2021188010 A1 WO 2021188010A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable
- electrically conductive
- wall
- conduit
- length
- Prior art date
Links
- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010616 electrical installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
-
- 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
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
Definitions
- the invention relates to electrical wiring products, namely, to conduits for laying cable lines for power transmission.
- cable lines are widely used, which, as a means for placing the cable, contain a tubular conduit, in the interior of which the cable is laid.
- the tubular conduit can be a single pipe or multiple pipes docked together.
- the considered conduit is intended for laying a power cable (6-500 kV) equipped with an outer polymer sheath.
- the specified conduit includes a tubular body, the wall of which is made of a dielectric polymer material, in particular, of polyethylene.
- the considered design of the conduit does not provide the ability to search for the location of damage to the outer sheath of the power cable by methods known from the prior art, based on the search and localization of the cable line route using the devices used for this purpose, the place where the test current supplied to the screen of the electric cable through its damaged outer shell goes into the ground.
- the outlet of the current into the ground is prevented by the wall of the case, made of polyethylene, which is a dielectric, which does not possess electrical conductivity properties in the direction from its inner surface to the outer surface.
- the conduit under consideration includes a tubular body, the wall of which is made of a dielectric polymer material, provided with an internal cavity for accommodating an electric cable.
- a tubular body the wall of which is made of a dielectric polymer material, provided with an internal cavity for accommodating an electric cable.
- separate electrically conductive sections distributed along the length of the body, are formed in the body wall, made for its entire thickness, allowing electric current to flow through the body wall in the direction from the inner surface of the body wall to its outer surface.
- These electrically conductive sections can be located along the length of the body with a certain step in one row, and can also be distributed around the circumference of the cross-section of the body and in this case form several rows along the length of the body.
- This conduit due to the electrically conductive sections formed in the wall of its housing, provides the possibility of the test current flowing through the cable to the ground and, therefore, the possibility of localizing the damage to the outer sheath of the cable.
- this situation occurs when the conduit is located on the ground surface in a cable trench or is only partially buried in the ground, electrically conductive sections are formed on a part of the surface of the conduit body, and the position of the conduit body is such that the electrically conductive sections distributed along its length are in that part of the body that is not in contact with the ground.
- the considered conduit has insufficient reliability in detecting the location of damage to the outer sheath of the cable.
- the technical problem is to improve the reliability of detecting the location of damage to the outer sheath of a cable installed in a tubular conduit made of a dielectric polymer material.
- the essence of the invention lies in the fact that in a conduit, including a tubular body, the wall of which is made of a polymer dielectric material, provided with an internal cavity for placing an electric cable, while in the wall of the body there are formed electrically conductive sections distributed along the length of the body, made for its entire thickness, providing the possibility of electric current flowing through the wall of the housing in the direction from the inner surface of the housing wall to its outer surface, according to the invention, the electrically conductive sections are made in the form of turns of an electrically conductive element located along the length of the housing along a helical line.
- the conduit body is made of a polymer dielectric material, which has sufficient mechanical strength and resistance to environmental factors, provides protection of the cable located in its internal space from mechanical damage and external influences when laying both ground and underground cable routes. This makes it possible to use technologically advanced and cost-effective methods of laying the cable route, in particular, the method of horizontal directional drilling, during which the polymer tubular body of the cable conduit is pulled into the ground, and then the cable is pulled into it. Due to the presence of the above-described electrically conductive member, the dielectric wall of the housing is electrically conductive from the inner surface to the outer surface.
- test current flowing through the cable it is possible for the test current flowing through the cable to exit into the ground, regardless of which part of the body surface is in contact with the ground, and the degree of its burial.
- the technical result achieved during the implementation of the claimed invention is to increase the reliability of detecting a damaged location in the outer sheath of a cable installed in a tubular conduit made of a dielectric polymer material.
- the electrically conductive element in the longitudinal section can have different shapes and linear dimensions, in particular the width S, and its turns can be spaced apart from each other at a distance H that differs from turn to turn or at the same, equal pitch of the helical line.
- the number of turns of an electrically conductive element, distributed along the body along its length, depends on the required accuracy of finding the place of cable damage.
- the specified electrically conductive element can be, in particular, made during the extrusion of the tubular body, while the dielectric and electrically conductive parts of the body can be joined during the production of the body during the implementation of their coextrusion or simultaneous extrusion.
- Said electrically conductive element can, in particular, be made in the form of a single insert element extending through the entire thickness of the housing wall or in the form of several contacting (mechanically and electrically) inserts made of metal or of an electrically conductive polymer material that extend through the entire thickness of the housing wall.
- the wall of the housing can be coated with an electrically conductive material on its inner or outer surface or on both of its surfaces (multilayer wall).
- the outer jacket of the cable installed in the conduit can be coated with an electrically conductive material.
- the conduit body can be made as a single pipe or as multiple pipes docked together.
- the electrically conductive element can be located along the length of the body with an offset from the end portions of the abutting conduits, in particular, for their connection to each other by welding.
- the inventive conduit can be advantageously used for laying a power cable (voltage 0.4-500 kV) containing a core, core insulation, metal shield and outer sheath.
- FIG. 1 General view of the claimed device
- fig. 2 is a cross-sectional view of the inventive device
- FIG. 3 current path from the damaged cable sheath to the surrounding soil.
- the device contains a tubular body 1, the wall of which is made of a dielectric polymer material.
- the housing 1 has a cavity 2 (see Fig. 2 and 3) for placing in its space an electric cable 3 (see Fig. 3).
- an extended electrically conductive element 4 is formed over its entire thickness and forms a single electrical circuit.
- the specified element 4 has a shape twisted around the axis of the housing 1 and contains turns located in the form of a helical line along the length of the housing 1.
- the element 4 is made, in particular, of an electrically conductive polymer material.
- the turns of the element 4, in particular, are placed along the length of the body 1 with a pitch H and have the same width S (Fig. 1).
- the device works as follows.
- the test current When the test current is applied along the screen of the cable 3, the current from its damaged sheath enters the inner space 2 of the housing 1 (Fig. 3) and then through the air medium, which has electrical conductivity due to its humidity and pollution, enters the inner surface of the cable sheath closest to the place of damage 3 sections of an electrically conductive element 4.
- the current from the damaged cable sheath 3 through the wall of the housing 1 enters the ground either in the area closest to the damage to the cable sheath 3, if this area is in contact with the ground, or in the zone where the turn, including the specified area, contacts the ground.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2020111628 | 2020-03-19 | ||
RU2020111628 | 2020-03-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021188010A1 true WO2021188010A1 (ru) | 2021-09-23 |
Family
ID=77771554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2020/050346 WO2021188010A1 (ru) | 2020-03-19 | 2020-11-24 | Кабелепровод |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2021188010A1 (ru) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6265880B1 (en) * | 1999-06-15 | 2001-07-24 | The United States Of America As Represented By The Secretary Of The Air Force | Apparatus and method for detecting conduit chafing |
RU186701U1 (ru) * | 2018-10-16 | 2019-01-30 | Общество с ограниченной ответственностью "ЭнергоТэк" | Кабельная линия |
RU188229U1 (ru) * | 2017-12-28 | 2019-04-03 | Общество с ограниченной ответственностью "ЭнергоТэк" | Электропроводящая полимерная труба кабель- канала для прокладки электрического кабеля |
-
2020
- 2020-11-24 WO PCT/RU2020/050346 patent/WO2021188010A1/ru active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6265880B1 (en) * | 1999-06-15 | 2001-07-24 | The United States Of America As Represented By The Secretary Of The Air Force | Apparatus and method for detecting conduit chafing |
RU188229U1 (ru) * | 2017-12-28 | 2019-04-03 | Общество с ограниченной ответственностью "ЭнергоТэк" | Электропроводящая полимерная труба кабель- канала для прокладки электрического кабеля |
RU186701U1 (ru) * | 2018-10-16 | 2019-01-30 | Общество с ограниченной ответственностью "ЭнергоТэк" | Кабельная линия |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2016305715B2 (en) | An assembly comprising an end-fitting and an unbonded flexible pipe | |
NL2009042C2 (en) | Electrical heating system for a section of fluid transport pipe, section and pipe equipped with such an electrical heating system. | |
US7282638B2 (en) | Protection profile for subsea cables | |
RU186701U1 (ru) | Кабельная линия | |
US10756529B2 (en) | Underwater electrical connection system | |
BR112017010223B1 (pt) | Cabo de força unido e método de fabricação do mesmo | |
RU196562U1 (ru) | Кабелепровод кабельной линии | |
RU198899U1 (ru) | Кабелепровод | |
WO2021188010A1 (ru) | Кабелепровод | |
EP0659300B1 (en) | Pre-bussed rigid conduit | |
CN106856666B (zh) | 高压输电线 | |
EP0113239B1 (en) | An insulated pipe system | |
SE515211C2 (sv) | Ledningselement för detekterbar ledning, förfarande för att erhålla ett sådant ledningselement och en användning av sådana ledningselement | |
US4571450A (en) | Moisture impervious power cable and conduit system | |
US9935448B2 (en) | Power cable, power cable system, method of grounding power cable system and method of constructing power cable system | |
CN110462937B (zh) | 耐腐蚀电管道系统 | |
RU202322U1 (ru) | Кабелепроводное устройство | |
JP2018156824A (ja) | ケーブル、ケーブルの事故点標定方法及びケーブルの接続方法 | |
US11646555B2 (en) | Cable line with electrically conductive areas | |
RU216820U1 (ru) | Кабелепровод кабельной линии | |
EA042234B1 (ru) | Кабелепровод кабельной линии | |
CN111599517B (zh) | 一种高阻燃高屏蔽耐扭电缆 | |
EP4068541A1 (en) | Cable conduit for cable line | |
KR101002792B1 (ko) | 공동구내 화재감지용 소방감지선의 접속 연결장치 | |
RU223822U1 (ru) | Труба кабельной линии |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20926007 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 20926007 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 20.02.2023) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 20926007 Country of ref document: EP Kind code of ref document: A1 |