CN110718332A - Rotatable freely-sliding type power cable - Google Patents
Rotatable freely-sliding type power cable Download PDFInfo
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- CN110718332A CN110718332A CN201910986949.6A CN201910986949A CN110718332A CN 110718332 A CN110718332 A CN 110718332A CN 201910986949 A CN201910986949 A CN 201910986949A CN 110718332 A CN110718332 A CN 110718332A
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- power cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/006—Constructional features relating to the conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1805—Protections not provided for in groups H01B7/182 - H01B7/26
- H01B7/1815—Protections not provided for in groups H01B7/182 - H01B7/26 composed of longitudinal inserts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments
- H01B7/1825—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/221—Longitudinally placed metal wires or tapes
- H01B7/223—Longitudinally placed metal wires or tapes forming part of a high tensile strength core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
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- Insulated Conductors (AREA)
Abstract
The invention discloses a rotatable free sliding type power cable, which comprises: a plurality of insulation core that the annular was arranged, the center of a plurality of insulation core sets up bears slider, it includes to bear slider: the rotating layer is arranged outside the central layer and can rotate relative to the central layer; the position that corresponds with the insulation core outside the rotation layer sets up the bellying, be equipped with on the bellying and can bear the gliding track that slides of insulation core. The invention has the beneficial effects that: one side of the insulating layer is provided with concave sliding tracks which are matched with the bearing sliding device, each track is internally provided with 3 small sliding tracks, and lubricating grease is coated in the sliding tracks. The structural design can enable the cable to have certain slippage in the axial direction of the cable.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a rotatable freely-sliding type power cable.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables.
The basic structure of the power cable is composed of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer. The core is the conductive part of the power cable, is used for transmitting electric energy, and is the main part of the power cable. The insulating layer electrically isolates the wire cores from the ground and the wire cores of different phases, ensures electric energy transmission and is an indispensable component in a power cable structure. Power cables of 15KV and above generally have a conductor shield and an insulation shield. The protective layer functions to protect the power cable from external impurities and moisture, and to prevent external force from directly damaging the power cable.
The inventor finds that the conventional power cable on the market can only meet the fixed laying requirement, and cannot deal with various stresses applied to the cable in the laying process, gravity generated by the self weight of the cable in vertical laying, and the cable is easy to break or twist off when the cable is bent or twisted. The specific situation is as follows:
at present, the class 2 stranded copper conductors are mostly adopted by the power cable as the conductive wire cores, the conductive wire cores are formed by stranding a plurality of copper conductors, compared with the flexibility of a single solid conductor, the bending radius is over small in the laying process in actual use, particularly at corners, the bending radius is seriously lower than the allowable bending radius of the cable, the cable is excessively bent, once overload or overvoltage operation occurs, an insulating material is heated due to the rise of the temperature of the conductors, insulation softening or deformation can be caused at the bent positions, and electrical accidents occur.
At present, due to the increase of transmission capacity, the cross section area of the power cable is gradually increased, and the weight of the power cable is particularly increased. The increased weight of the cable makes it more difficult to lay. And because the dead weight of cable is great, make the copper conductor can appear the creep phenomenon because of the increase of time for the cable joint appears becoming flexible easily and causes contact resistance to increase, and sharp themogenesis when passing through the electric current causes insulating material to age with higher speed.
When the cable is vertically laid, the conductor is easily extended due to the dead weight of the cable, so that the resistance of a conductive wire core is increased, the heating phenomenon of the conductor is accelerated, and the excessive aging of an insulating material is caused; reducing the service life of the cable.
Disclosure of Invention
In order to solve the problems, the invention provides a rotatable freely-sliding power cable which has the characteristics of high flexibility, free rotation and sliding, strong bearing capacity and the like.
In some embodiments, the following technical scheme is adopted:
a rotatable freely sliding power cable comprising: a plurality of insulation core that the annular was arranged, the center of a plurality of insulation core sets up bears slider, it includes to bear slider: the rotating layer is arranged outside the central layer and can rotate relative to the central layer; the position that the rotation layer is corresponding with the insulation core outward sets up the bellying, the recess phase-match that sets up on bellying and the insulation core forms and can bear the gliding portion of sliding of insulation core.
The center bears formula slider can rely on the high strength carbon-fibre composite free rotation that the center set up to the center has added lubricating grease, has greatly improved cable tensile strength, and can realize the cable free rotation. The problem that the toughness of a cable conductor is reduced or the cable is broken due to the fact that the cable is twisted in the circumferential direction in the cable laying or using process is solved.
Concave sliding tracks matched with the bearing sliding device are arranged on one side of the insulating layer, the protruding portions are in a cross shape, so that 3 small sliding tracks are formed in each track, and lubricating grease is coated in the sliding tracks. The structural design can enable the cable to have certain slippage in the axial direction of the cable.
Compared with the prior art, the invention has the beneficial effects that:
(1) the wire core (conductor) is formed by twisting a category 6 soft copper conductor, and a solid lubricating layer is arranged between the inner layer conductor and the outer layer conductor, so that the inner layer conductor and the outer layer conductor can freely slide and are isolated from each other. The cable can have a smaller bending radius in the laying process, so that the cable has better bending resistance.
(2) One side of the insulating layer is provided with concave sliding tracks which are matched with the bearing sliding device, each track is internally provided with 3 small sliding tracks, and lubricating grease is coated in the sliding tracks. The structural design can enable the cable to have certain slippage in the axial direction of the cable.
(3) Bear slider center and set up carbon fiber material, carbon fiber material has superstrong tensile strength, no matter when laying perpendicularly or level laying, can all bear the atress of cable by carbon fiber material completely, and the cable conductor core can not undertake the external force that comes from level or vertical direction, the effectual life who prolongs the cable. And a lubricating paste is arranged between the central carbon fiber material and the outer rotating layer, so that the tensile strength of the cable is greatly improved, and the free rotation of the outer rotating layer can be realized.
(4) Set up the galvanized steel wire between the insulation core, can make the gravity that the cable dead weight produced undertake by the galvanized steel wire completely, effectively reduced the bearing of cable, improved the tensile strength when cable lays perpendicularly.
(5) The extrusion type filling layer is arranged outside the cable core, so that gaps among the cable cores can be filled under the premise of not occupying the effective space of the cable, the lateral pressure of the cable in the horizontal direction is effectively improved, and the phenomenon of uneven stress of the cable when the cable is bent can be avoided.
(6) The cable sheath sets up annular groove, compares in circular sheath, can have certain fixing device when fixed cable, prevents that the cable is fixed insecure.
Drawings
Fig. 1 is a schematic structural diagram of a rotatable freely-sliding power cable according to a first embodiment of the present invention;
the cable comprises an inner conductor 1, a solid lubricating paste layer 2, an outer conductor 3, a sliding track 4, protruding saw teeth 5, insulation 6, high-strength galvanized steel wires 7, a carbon fiber composite material 8, a solid lubricating paste 9, a bearing sliding device 10, a cable filling layer 11, a cable sheath 12 and an annular fixing groove 13.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
In one or more embodiments, a rotatable freely-sliding type power cable is disclosed, as shown in fig. 1, specifically including: a plurality of insulation core that the annular was arranged, insulation core includes: the cable comprises a wire core and an insulating layer extruded outside the wire core; the center of a plurality of insulation core sets up bears slider 10, bears slider 10 and includes: the rotating layer is arranged outside the central layer and can rotate relative to the central layer; the position corresponding with the insulation core outside the rotation layer sets up the bellying, is equipped with on the bellying and can bears the gliding track of sliding 4 of insulation core.
The sinle silk comprises inlayer conductor 1, solid lubricating grease 9 layer 2, outer conductor 3 and insulating 6 jointly, and its sinle silk is whole to mutually support through the recess that sets up on insulating 6 and the arch of load-carrying device and form track 4 that slides to set up the lubricating layer in protruding and recess mutual contact part, in order to realize the slippage of sinle silk.
In this embodiment, the power cable is formed by twisting a category 6 soft copper conductor, the conductor is formed by twisting 2 layers, and a solid lubricating paste 9 is arranged between the two layers of conductors, so that the conductors of the layers can slide and be isolated from each other.
The conventional conductor layers are generally contacted with each other and are twisted in opposite directions, so that the service life of the conductor is seriously shortened due to the friction between the layers and the internal stress generated when the conductor is twisted in the using process of the cable, and the phenomenon is more serious particularly for a mobile flexible cable. In the embodiment, the lubricating paste is arranged between the layers, so that the layers are not mutually contacted, the friction between conductors is not generated in the cable bending process, and the internal stress in the bending process is greatly reduced due to the lubricating effect; the service life and the bending resistance of the cable are improved.
The central bearing sliding device 10 is made of high-strength thermoplastic polyurethane elastomer materials, the center of the central bearing type sliding device is made of high-strength carbon fiber composite materials 8, solid lubricating paste 9 is filled outside the carbon fiber composite materials 8, so that the bearing device can rotate freely, the bearing sliding device 10 is composed of 5 convex sawteeth 5, each sawtooth is composed of three small-sized convex sawteeth, and insulating wire cores are arranged on the 5 sawteeth of the bearing sliding device 10 in a straight line respectively to form a circle.
The convex serrations 5 function as: be used for fixed insulation core and set up slip track 4 on protruding form sawtooth 5 for insulation core can slide along the cable axial on the track of fixed setting. But design the form of free slip with insulating sinle silk to insulating sinle silk is the straight line and sets up on central bearing slide device 10, has effectively reduced the length of insulating sinle silk and the inconsistent problem of stranding sinle silk length in the heliciform stranding.
The cable frequently meets the condition that the cable twists reverse along the circumferencial direction in cable laying or use, because of the cable itself can't twist reverse, can produce torsional force when being forced to twist reverse, can seriously damage the cable when serious or torsion angle is too big, causes cable conductor toughness to reduce, can cause the cable fracture when serious. The center of this embodiment bears formula slider can rely on the 8 free rotations of high strength carbon-fibre composite that the center set up to the center has added lubricating grease, has greatly improved cable tensile strength, and can realize that the cable freely rotates.
The central bearing sliding device 10 replaces the conventional cable filling rope, so that the cable can freely rotate or slide during laying, bending, vertical laying and moving, and various external forces applied to the cable are greatly reduced. The service life of the cable is prolonged.
The insulating layer is formed by polyurethane elastomer material crowded package, and insulating layer one side is left and is born the spill track 4 that slides that sliding device 10 matches each other, and the bellying sets up to cross for form 3 miniature tracks 4 that slide in every track.
The function of the insulation 6 is to isolate electrically charged parts of different potential in the electrical apparatus. Therefore, the insulating material should have high insulation resistance and high compressive strength, and can avoid accidents such as electric leakage and breakdown. The heat resistance is good, and aging and deterioration caused by long-term overheating are avoided; in addition, the material also has the characteristics of good thermal conductivity, moisture resistance, lightning protection, high mechanical strength, convenient process and the like. According to the above requirements, the performance indexes of the commonly used insulating materials are insulation strength, tensile strength, specific gravity, expansion coefficient and the like.
The thermoplastic polyurethane elastomer material is a novel organic polymer synthetic material, belongs to a compound, has excellent various properties, can replace rubber and soft polyvinyl chloride material, has excellent physical properties such as better wear resistance and better resilience than common polyurethane and PVC, and has better aging resistance than rubber.
Set up high strength galvanized steel wire 7 between insulating sinle silk and sinle silk, steel wire and sinle silk are independent each other. The tensile strength of the vertical direction of the cable can be greatly improved by arranging the high-strength galvanized steel wire 7, the vertical laying of the cable is facilitated, the gravity generated by the cable can be completely born by the steel wire when the cable is laid vertically, and the cable conductor does not need to bear tension. Effectively reducing the damage of the cable caused by self weight.
And extruding and wrapping the high-strength thermoplastic polyurethane elastomer material outside the cable core to form a cable filling layer 11. The filling layer is externally extruded with an ethylene propylene diene monomer sheath material to form a cable sheath 12, and grooves with 72-degree intervals are arranged on the sheath so as to strengthen the fixation of the cable during the laying of the cable.
The purpose of setting up cable filling layer 11 is effectively filling the clearance between the cable core under the prerequisite that does not increase the cable external diameter, makes to reduce the looks mutual friction between the sinle silk to atress inequality phenomenon when can effectively reducing the cable bending.
The gaps among the cable cores are extruded and filled in an extrusion mode, the phenomenon of uneven stress of the cable cores can be effectively reduced on the premise that the cable space is not occupied, and the anti-extrusion performance of the cable is improved.
The cable sheath 12 is designed to be provided with the annular fixing groove 13, and can have a certain fixing effect when the cable is fixed, so that the cable is prevented from being fixed insecurely.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. A rotatable freely sliding type power cable, characterized by comprising: a plurality of insulation core that the annular was arranged, the center of a plurality of insulation core sets up bears slider, it includes to bear slider: the rotating layer is arranged outside the central layer and can rotate relative to the central layer; the position that the rotation layer is corresponding with the insulation core outward sets up the bellying, the recess phase-match that sets up on bellying and the insulation core forms and can bear the gliding portion of sliding of insulation core.
2. A rotatable freely sliding power cable according to claim 1, characterized in that a lubricating layer is provided between the central layer and the rotating layer.
3. The rotatable freely sliding type power cable as claimed in claim 1, wherein said projection is of a cross-shaped configuration.
4. A rotatable freely sliding power cable according to claim 1, characterized in that the insulated wire core comprises: the cable comprises a wire core and an insulating layer extruded outside the wire core; the insulating layer is provided with a groove which is matched with the shape of the bulge and can accommodate the bulge.
5. The rotatable freely sliding power cable of claim 4, wherein the wire core comprises: the inner conductor, the outer conductor and the lubricating layer arranged between the two conductors.
6. A rotatable freely sliding type electric power cable as claimed in claim 1, wherein galvanized steel wires are provided in the space between adjacent two insulated wire cores.
7. A rotatable freely sliding power cable as claimed in claim 1, characterized in that the cable filling layer is formed by extrusion-wrapping thermoplastic polyurethane elastomer material around the insulated core.
8. The rotatable sliding-type power cable as claimed in claim 7, wherein a cable sheath is disposed outside the cable filler layer, and a plurality of fixing grooves for fixing the power cable are provided at intervals on the cable sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986949.6A CN110718332B (en) | 2019-10-17 | 2019-10-17 | Rotatable freely-sliding type power cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986949.6A CN110718332B (en) | 2019-10-17 | 2019-10-17 | Rotatable freely-sliding type power cable |
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| CN110718332A true CN110718332A (en) | 2020-01-21 |
| CN110718332B CN110718332B (en) | 2021-06-04 |
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| CN201910986949.6A Active CN110718332B (en) | 2019-10-17 | 2019-10-17 | Rotatable freely-sliding type power cable |
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| US6292436B1 (en) * | 1997-10-01 | 2001-09-18 | Input/Output, Inc. | Underwater cable arrangements, internal devices for use in an underwater cable, and methods of connecting and internal device to a stress member of an underwater cable |
| CN106782816A (en) * | 2017-01-05 | 2017-05-31 | 南通沃特光电科技有限公司 | A kind of resistant to bending flexible cable |
| CN106847380A (en) * | 2016-12-09 | 2017-06-13 | 晋源电气集团股份有限公司 | A kind of fire-retardant transmission cable of anti-extrusion |
| CN107003491A (en) * | 2014-12-19 | 2017-08-01 | 陶氏环球技术有限责任公司 | Cable cover(ing) with the micro-structural through design and the method for preparing the cable cover(ing) with the micro-structural through design |
| CN206758143U (en) * | 2017-06-05 | 2017-12-15 | 安徽龙芯电力电线有限公司 | A kind of aluminum alloy conductor power cable |
| CN108039237A (en) * | 2017-11-23 | 2018-05-15 | 东莞市联洲知识产权运营管理有限公司 | A kind of cable is not easy the cable cover(ing) deviate from |
| CN208157123U (en) * | 2018-03-22 | 2018-11-27 | 扬州曙光电缆股份有限公司 | A kind of composite industrial robot cable |
| CN208157088U (en) * | 2018-05-09 | 2018-11-27 | 江苏宝安电缆有限公司 | A kind of coaxial low noise cable |
| CN208460463U (en) * | 2018-07-25 | 2019-02-01 | 安徽华上电缆科技有限公司 | A kind of fireproof high-temperature resistant type copper core armoured power cable |
-
2019
- 2019-10-17 CN CN201910986949.6A patent/CN110718332B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6292436B1 (en) * | 1997-10-01 | 2001-09-18 | Input/Output, Inc. | Underwater cable arrangements, internal devices for use in an underwater cable, and methods of connecting and internal device to a stress member of an underwater cable |
| CN107003491A (en) * | 2014-12-19 | 2017-08-01 | 陶氏环球技术有限责任公司 | Cable cover(ing) with the micro-structural through design and the method for preparing the cable cover(ing) with the micro-structural through design |
| CN106847380A (en) * | 2016-12-09 | 2017-06-13 | 晋源电气集团股份有限公司 | A kind of fire-retardant transmission cable of anti-extrusion |
| CN106782816A (en) * | 2017-01-05 | 2017-05-31 | 南通沃特光电科技有限公司 | A kind of resistant to bending flexible cable |
| CN206758143U (en) * | 2017-06-05 | 2017-12-15 | 安徽龙芯电力电线有限公司 | A kind of aluminum alloy conductor power cable |
| CN108039237A (en) * | 2017-11-23 | 2018-05-15 | 东莞市联洲知识产权运营管理有限公司 | A kind of cable is not easy the cable cover(ing) deviate from |
| CN208157123U (en) * | 2018-03-22 | 2018-11-27 | 扬州曙光电缆股份有限公司 | A kind of composite industrial robot cable |
| CN208157088U (en) * | 2018-05-09 | 2018-11-27 | 江苏宝安电缆有限公司 | A kind of coaxial low noise cable |
| CN208460463U (en) * | 2018-07-25 | 2019-02-01 | 安徽华上电缆科技有限公司 | A kind of fireproof high-temperature resistant type copper core armoured power cable |
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