CN111540519A - Cross-linked polyethylene insulated water-blocking power cable - Google Patents
Cross-linked polyethylene insulated water-blocking power cable Download PDFInfo
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- CN111540519A CN111540519A CN202010363527.6A CN202010363527A CN111540519A CN 111540519 A CN111540519 A CN 111540519A CN 202010363527 A CN202010363527 A CN 202010363527A CN 111540519 A CN111540519 A CN 111540519A
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- layer
- fixedly arranged
- buffer
- 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
- 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
- H01B7/185—Sheaths comprising internal cavities or channels
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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
- H01B7/184—Sheaths comprising grooves, ribs or other projections
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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
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/021—Features relating to screening tape per se
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Abstract
The invention relates to the technical field of cables and discloses a crosslinked polyethylene insulating water-blocking power cable which comprises a plurality of conducting wires, wherein the outer parts of the conducting wires are uniformly distributed in a surrounding manner, insulating layers are fixedly arranged on the outer parts of the conducting wires, an anti-extrusion mechanism is arranged in each insulating layer, a buffer layer is fixedly arranged on the outer part of each insulating layer, a shielding layer is fixedly arranged on the outer part of each buffer layer, an anti-corrosion layer is fixedly arranged on the outer part of each shielding layer, a waterproof layer is fixedly arranged on the outer part of each anti-corrosion layer, and a flame-retardant layer is fixedly arranged on the outer part of each waterproof; the wire comprises main guide core, assistance core and protective sheath, and assistance core is to encircle evenly distributed and sets up on the outer wall of main guide core, and a plurality of assistance cores are the heliciform winding and set up on the outer wall of main guide core. The cross-linked polyethylene insulated water-blocking power cable improves the service performance of the power cable, prolongs the service life of the power cable and is beneficial to electric power laying in severe environment.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a crosslinked polyethylene insulated water-blocking power cable.
Background
In recent years, the importance of water resistance is becoming more and more appreciated for cables laid in harsh and humid environments, particularly in regions with high ground water levels or rainy weather throughout the year (such as the south of the Yangtze river in China).
At present, most of power cables are directly buried, so that the possibility that the cables are subjected to soil pressure and are damaged by external force due to human factors is high, water enters from a damaged part or a joint part and then diffuses towards two ends of the cables, and the electrical property of the cables is reduced. Another possibility is: in the process of storing, transporting, laying and operating the cable, the cable protective layer is damaged due to the accidental action of mechanical force, water enters from the damaged part to the inside and then diffuses towards the two ends of the cable, and the electrical property of the cable is reduced. When the cable is installed in a humid environment, if a good water blocking structure is not provided, the cable is more easily invaded by moisture, so that insulation damage is caused, the service life of the cable is greatly shortened, and the influence of moisture on various performances of the cable in the environment and the damage of the cable are reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the crosslinked polyethylene insulating water-blocking power cable, which improves the service performance of the power cable, prolongs the service life of the power cable, is beneficial to electric power laying in severe environment, and solves the problems of poor waterproof effect, flame retardant property, extrusion resistance and electric quantity conductivity of the crosslinked polyethylene insulating power cable in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a crosslinked polyethylene insulating water-blocking power cable comprises a plurality of wires, wherein the outer parts of the plurality of wires are uniformly distributed in a surrounding manner, insulating layers are fixedly arranged on the outer parts of the plurality of wires, an anti-extrusion mechanism is arranged inside the insulating layers, buffer layers are fixedly arranged on the outer parts of the insulating layers, shielding layers are fixedly arranged on the outer parts of the buffer layers, anti-corrosion layers are fixedly arranged on the outer parts of the shielding layers, waterproof layers are fixedly arranged on the outer parts of the anti-corrosion layers, and flame-retardant layers are fixedly arranged on the outer parts of the waterproof layers;
the wire consists of a main guide core, auxiliary guide cores and a protective sleeve, wherein the auxiliary guide cores are uniformly distributed on the outer wall of the main guide core in a surrounding manner, a plurality of auxiliary guide cores are spirally wound on the outer wall of the main guide core, and the main guide core and the auxiliary guide cores are arranged inside the protective sleeve;
the anti-extrusion mechanism comprises extrusion strips, the extrusion strips are uniformly distributed and fixedly arranged on the inner side wall of the insulating layer in a surrounding manner, the extrusion strips are distributed along the length direction of the insulating layer, fixing holes are formed in the extrusion strips along the length direction of the extrusion strips, the conducting wire is fixedly arranged in the extrusion strips through the fixing holes, and the extrusion strips are abutted to the conducting wire positioned in the center;
a plurality of buffer cavities which are uniformly distributed are arranged in the buffer layer in a surrounding manner, a first buffer strip and a second buffer strip are fixedly arranged in each of the plurality of buffer cavities, the first buffer strip and the second buffer strip are arranged in an X-shaped crossed manner, and two ends of the first buffer strip and two ends of the second buffer strip are fixedly connected with four corners of the buffer cavities respectively;
the inside of shielding layer is encircleed fixed the first shielded wire that inlays and is equipped with a plurality of evenly distributed along its length direction, the inside of shielding layer just is located adjacent two be equipped with a plurality of evenly distributed's second shielded wire between the first shielded wire, it is a plurality of the both ends of second shielded wire respectively with adjacent two the outer wall fixed connection of first shielded wire.
Preferably, the bottom of the flame-retardant layer is fixedly provided with a supporting sheet, the bottom of the supporting sheet is provided with a flat end face, and the two sides of the supporting sheet are both provided with arc faces.
Preferably, the support sheet and the flame-retardant layer are integrally formed, and the support sheet and the flame-retardant layer are made of the same material.
Preferably, the main guide core and the auxiliary guide core are red copper cores.
Preferably, the extrusion strips and the buffer layer are made of natural rubber materials.
Preferably, the first shielding wire and the second shielding wire form a shielding net, and the first shielding wire and the second shielding wire are both made of a metal Ni material.
Preferably, the insulating layer is formed by extruding polyethylene.
Preferably, the flame-retardant layer is coated with a paint formed by mixing an anticorrosive paint and a flame-retardant paint.
(III) advantageous effects
Compared with the prior art, the invention provides a crosslinked polyethylene insulating water-blocking power cable which has the following beneficial effects:
1. this insulating power cable that blocks water of crosslinked polyethylene, through the buffer layer that is equipped with and set up the cushion chamber in the buffer layer inside, first buffering strip and second buffering strip, when the cable body is receiving the extrusion completion, can make buffer layer and buffer chamber take place deformation and extrude first buffering strip and second buffering strip, thereby can guarantee that the cable body possesses higher buffering effect, through the extrusion strip that is equipped with, when the cable body is receiving the extrusion completion, can realize compressing tightly the extrusion strip each other between two adjacent wires, and make it produce certain deformation, thereby can guarantee that the cable body possesses higher anti extrusion performance.
2. This insulating power cable that blocks water of crosslinked polyethylene through the shielding layer that is equipped with and set up at the inside first shielded wire and the second shielded wire of shielding layer, forms a netted shielding layer between first shielded wire and the second shielded wire to can live the wire isolation cover, guaranteed the shielding performance of wire.
3. The cross-linked polyethylene insulated water-blocking power cable can ensure that the rated voltage passing through the interior of the cable body is 26/35kV through the main guide core and the auxiliary guide core arranged in the protective sleeve.
Drawings
FIG. 1 is a schematic structural view of a cross-linked polyethylene insulated water-blocking power cable according to the present invention;
FIG. 2 is a schematic view of the internal structure of the lead of the present invention;
FIG. 3 is an enlarged view of the portion A of FIG. 1;
fig. 4 is a schematic structural diagram of the first shielded wire and the second shielded wire in the present invention.
In the figure: the cable comprises a lead 1, an insulating layer 2, a buffer layer 3, a shielding layer 4, an anti-corrosion layer 5, a waterproof layer 6, a flame-retardant layer 7, a main guide core 8, an auxiliary guide core 9, a protective sleeve 10, a buffer cavity 11, a first buffer strip 12, a first shielding wire 13, a second shielding wire 14, an extrusion strip 15, a support sheet 16 and a second buffer strip 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a cross-linked polyethylene insulated water-blocking power cable includes a plurality of wires 1, the outer portions of the plurality of wires 1 are uniformly distributed in a surrounding manner, insulating layers 2 are fixed to the outer portions of the plurality of wires 1, an anti-extrusion mechanism is arranged inside the insulating layers 2, buffer layers 3 are fixed to the outer portions of the insulating layers 2, shielding layers 4 are fixed to the outer portions of the buffer layers 3, anti-corrosion layers 5 are fixed to the outer portions of the shielding layers 4, waterproof layers 6 are fixed to the outer portions of the anti-corrosion layers 5, and flame-retardant layers 7 are fixed to the outer portions of the waterproof layers 6;
the lead 1 consists of a main guide core 8, an auxiliary guide core 9 and a protective sleeve 10, wherein the auxiliary guide cores 9 are uniformly distributed on the outer wall of the main guide core 8 in a surrounding manner, a plurality of auxiliary guide cores 9 are spirally wound on the outer wall of the main guide core 8, and the main guide core 8 and the auxiliary guide cores 9 are both arranged in the protective sleeve 10;
the anti-extrusion mechanism comprises extrusion strips 15, the extrusion strips 15 are uniformly distributed and fixedly arranged on the inner side wall of the insulating layer 2 in a surrounding manner, the extrusion strips 15 are distributed along the length direction of the insulating layer 2, fixing holes are formed in the extrusion strips 15 along the length direction of the extrusion strips, the wire 1 is fixedly arranged in the extrusion strips 15 through the fixing holes, and the extrusion strips 15 are abutted to the central wire 1;
a plurality of buffer cavities 11 which are uniformly distributed are arranged in the buffer layer 3 in a surrounding manner, a first buffer strip 12 and a second buffer strip 17 are fixedly arranged in each of the plurality of buffer cavities 11, the first buffer strip 12 and the second buffer strip 17 are arranged in an X-shaped cross manner, and two ends of the first buffer strip 12 and two ends of the second buffer strip 17 are fixedly connected with four corners of the buffer cavities 11 respectively;
the inside of shielding layer 4 encircles fixedly along its length direction and inlays the first shielded wire 13 that is equipped with a plurality of evenly distributed, and the inside of shielding layer 4 just is located and is equipped with a plurality of evenly distributed's second shielded wire 14 between two adjacent first shielded wires 13, and the both ends of a plurality of second shielded wires 14 respectively with the outer wall fixed connection of two adjacent first shielded wires 13.
The bottom of the flame-retardant layer 7 is fixedly provided with a support sheet 16, the bottom of the support sheet 16 is provided with a flat end face, and the two sides of the support sheet 16 are provided with arc faces.
The main guide core 8 and the auxiliary guide core 9 are both red copper cores.
The extrusion strips 15 and the buffer layer 3 are made of natural rubber materials.
The first shielding wire 13 and the second shielding wire 14 constitute a shielding net, and both the first shielding wire 13 and the second shielding wire 14 are made of a metal Ni material.
The insulating layer 2 is formed by extruding polyethylene.
The exterior of the flame-retardant layer 7 is sprayed with a coating formed by mixing an anticorrosive coating and a flame-retardant coating.
To sum up, the cross-linked polyethylene insulated waterproof power cable is used, and when the cable body is extruded, the buffer layer 3 and the buffer cavity 11 arranged inside the buffer layer 3, the first buffer strip 12 and the second buffer strip 17 can be deformed and extrude the first buffer strip 12 and the second buffer strip 17, so that the cable body can be ensured to have a high buffering effect, and when the cable body is extruded, the extrusion strips 15 can be arranged, so that the extrusion strips 15 can be mutually compressed between two adjacent wires 1 and can be deformed to a certain extent, and the cable body can be ensured to have high extrusion resistance; through the arranged shielding layer 4 and the first shielding wire 13 and the second shielding wire 14 which are arranged in the shielding layer 4, a net-shaped shielding layer 4 is formed between the first shielding wire 13 and the second shielding wire 14, so that the lead 1 can be isolated and covered, and the shielding performance of the lead 1 is ensured; the main guide core 8 and the auxiliary guide core 9 arranged inside the protective sheath 10 can ensure that the rated voltage passing through the inside of the cable body is 26/35 kV.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an insulating power cable that blocks water of crosslinked polyethylene, includes a plurality of wires (1), its characterized in that: the anti-corrosion device is characterized in that the outer parts of the plurality of wires (1) are uniformly distributed in a surrounding manner, insulating layers (2) are fixedly arranged on the outer parts of the plurality of wires (1), anti-extrusion mechanisms are arranged inside the insulating layers (2), buffer layers (3) are fixedly arranged on the outer parts of the insulating layers (2), shielding layers (4) are fixedly arranged on the outer parts of the buffer layers (3), anti-corrosion layers (5) are fixedly arranged on the outer parts of the shielding layers (4), waterproof layers (6) are fixedly arranged on the outer parts of the anti-corrosion layers (5), and flame-retardant layers (7) are fixedly arranged on the outer parts of the waterproof layers (6);
the lead (1) consists of a main guide core (8), auxiliary guide cores (9) and a protective sleeve (10), wherein the auxiliary guide cores (9) are uniformly distributed on the outer wall of the main guide core (8) in a surrounding manner, a plurality of auxiliary guide cores (9) are spirally wound on the outer wall of the main guide core (8), and the main guide core (8) and the auxiliary guide cores (9) are arranged inside the protective sleeve (10);
the anti-extrusion mechanism comprises extrusion strips (15), the extrusion strips (15) are uniformly distributed and fixedly arranged on the inner side wall of the insulating layer (2) in a surrounding mode, the extrusion strips (15) are distributed along the length direction of the insulating layer (2), fixing holes are formed in the extrusion strips (15) along the length direction of the extrusion strips, the lead (1) is fixedly arranged in the extrusion strips (15) through the fixing holes, and the extrusion strips (15) are abutted to the lead (1) located in the center;
the buffer structure is characterized in that a plurality of buffer cavities (11) which are uniformly distributed are arranged in the buffer layer (3) in a surrounding manner, a first buffer strip (12) and a second buffer strip (17) are fixedly arranged in each of the buffer cavities (11), the first buffer strip (12) and the second buffer strip (17) are arranged in an X-shaped cross manner, and two ends of the first buffer strip (12) and two ends of the second buffer strip (17) are fixedly connected with four corners of the buffer cavities (11) respectively;
the inside of shielding layer (4) is encircleed fixed first shielded wire (13) that are equipped with a plurality of evenly distributed along its length direction, the inside of shielding layer (4) just is located adjacent two be equipped with a plurality of evenly distributed's second shielded wire (14) between first shielded wire (13), it is a plurality of the both ends of second shielded wire (14) respectively with adjacent two the outer wall fixed connection of first shielded wire (13).
2. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: the bottom of the flame-retardant layer (7) is fixedly provided with a supporting sheet (16), the bottom of the supporting sheet (16) is provided with a flat end face, and the two sides of the supporting sheet (16) are provided with arc faces.
3. The insulated crosslinked polyethylene water-blocking power cable according to claim 2, wherein: the support sheet (16) and the flame-retardant layer (7) are integrally formed, and the support sheet (16) and the flame-retardant layer (7) are made of the same material.
4. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: the main guide core (8) and the auxiliary guide core (9) are red copper cores.
5. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: the extrusion strips (15) and the buffer layer (3) are both made of natural rubber materials.
6. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: the first shielding wire (13) and the second shielding wire (14) form a shielding net, and the first shielding wire (13) and the second shielding wire (14) are both made of metal Ni materials.
7. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: the insulating layer (2) is formed by extruding polyethylene.
8. The insulated crosslinked polyethylene water-blocking power cable according to claim 1, wherein: and a coating formed by mixing an anticorrosive coating and a flame-retardant coating is sprayed on the outer part of the flame-retardant layer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363527.6A CN111540519A (en) | 2020-04-30 | 2020-04-30 | Cross-linked polyethylene insulated water-blocking power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363527.6A CN111540519A (en) | 2020-04-30 | 2020-04-30 | Cross-linked polyethylene insulated water-blocking power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111540519A true CN111540519A (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010363527.6A Pending CN111540519A (en) | 2020-04-30 | 2020-04-30 | Cross-linked polyethylene insulated water-blocking power cable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203941724U (en) * | 2014-06-11 | 2014-11-12 | 江阴市江南氟塑有限公司 | A kind of compound insulation sleeve |
| CN204558148U (en) * | 2015-05-12 | 2015-08-12 | 林鸿志 | A kind of Novel fireproof cable |
| CN208256329U (en) * | 2018-06-11 | 2018-12-18 | 临沂启阳电缆有限公司 | A kind of high-strength cable |
| CN209625890U (en) * | 2019-04-30 | 2019-11-12 | 湖北南远电缆科技有限公司 | A kind of flame-retardant refractory flexible electric cable |
| CN210349413U (en) * | 2019-07-31 | 2020-04-17 | 河北佰澜特种电缆有限公司 | High-performance weather-proof electric welding machine flexible cable with rare earth aluminum alloy conductor |
-
2020
- 2020-04-30 CN CN202010363527.6A patent/CN111540519A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203941724U (en) * | 2014-06-11 | 2014-11-12 | 江阴市江南氟塑有限公司 | A kind of compound insulation sleeve |
| CN204558148U (en) * | 2015-05-12 | 2015-08-12 | 林鸿志 | A kind of Novel fireproof cable |
| CN208256329U (en) * | 2018-06-11 | 2018-12-18 | 临沂启阳电缆有限公司 | A kind of high-strength cable |
| CN209625890U (en) * | 2019-04-30 | 2019-11-12 | 湖北南远电缆科技有限公司 | A kind of flame-retardant refractory flexible electric cable |
| CN210349413U (en) * | 2019-07-31 | 2020-04-17 | 河北佰澜特种电缆有限公司 | High-performance weather-proof electric welding machine flexible cable with rare earth aluminum alloy conductor |
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Application publication date: 20200814 |
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