CN215577804U - Cross-linked polyethylene insulated cold-resistant power cable - Google Patents
Cross-linked polyethylene insulated cold-resistant power cable Download PDFInfo
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- CN215577804U CN215577804U CN202121813905.2U CN202121813905U CN215577804U CN 215577804 U CN215577804 U CN 215577804U CN 202121813905 U CN202121813905 U CN 202121813905U CN 215577804 U CN215577804 U CN 215577804U
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Abstract
The utility model discloses a crosslinked polyethylene insulated cold-resistant power cable which comprises a cable core, and a compression-resistant layer, a buffer layer, a cold-resistant layer, an armor layer and a sheath layer which are sequentially coated outside the cable core; the cable core comprises a limiting frame and four wire cores, the cross section of the limiting frame is in a cross shape, four accommodating grooves are formed in the periphery of the limiting frame, the four wire cores are respectively arranged in the four accommodating grooves, pressure-bearing folded plates are arranged between the four wire cores and the limiting frame, buffer cores are arranged on the outer sides of the four wire cores, and each wire core comprises a copper conductor and a crosslinked polyethylene insulating layer coated outside the copper conductor; the buffer layer includes that the interval is even sets up the round buffering arris in the compressive layer periphery, and it has the heat preservation core to fill between two adjacent buffering arriss, and the inside of heat preservation core is inlayed and is equipped with first tensile core, and the inside interval on restrictive coating is inlayed and is equipped with round second tensile core. The utility model aims to solve the problem that the existing power cable is insufficient in compression resistance, cold resistance and tensile property.
Description
Technical Field
The utility model relates to the technical field of power cables, in particular to a crosslinked polyethylene insulated cold-resistant power cable.
Background
The power cable is used for transmitting and distributing electric energy, 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, and has a gradually increasing proportion in the power line. 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.
In the prior art, the power cable still has some defects and shortcomings, one of which is that the existing power cable has insufficient pressure resistance and is easy to damage and break when the power cable is subjected to external pressure; secondly, the cold resistance of the power cable is insufficient, when the power cable works in a low-temperature environment for a long time, the sheath layer and the inner sheath layer of the power cable are easy to become brittle, crack and the like, and meanwhile, the bending performance of the power cable is also influenced; thirdly, power cable's tensile strength is poor, and when power cable laid in low temperature environment, power cable damaged, the fracture because of receiving external pulling easily, power cable's life is short.
Aiming at the technical problems, the utility model discloses a crosslinked polyethylene insulated cold-resistant power cable which has the advantages of improving the compression resistance, the cold resistance and the tensile property of the power cable, prolonging the service life of the power cable and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, and provides a crosslinked polyethylene insulated cold-resistant power cable to solve the technical problems of insufficient compression resistance, cold resistance and tensile resistance, short service life and the like of the power cable in the prior art.
The utility model is realized by the following technical scheme: the utility model discloses a crosslinked polyethylene insulated cold-resistant power cable which comprises a cable core, and a compression-resistant layer, a buffer layer, a cold-resistant layer, an armor layer and a sheath layer which are sequentially coated outside the cable core; the cable core comprises a limiting frame and four wire cores, the cross section of the limiting frame is in a cross shape, the outer ends of four supporting edges of the limiting frame are respectively provided with a first convex edge, the cross section of the first convex edge is in a fan shape, the width of the outer end of the first convex edge is larger than that of the inner end of the first convex edge, the inner wall of the compression resistant layer is provided with a first groove corresponding to the position of the first convex edge, the outer end part of the first convex edge is respectively clamped in the first groove, the periphery of the limiting frame is provided with four containing grooves, the cross section of the wire cores is in a fan shape, the four wire cores are respectively arranged in the four containing grooves with arc edges outwards, folded plates are respectively arranged between the four wire cores and the limiting frame, the included angle between two folded edges of the folded plates is 90 degrees, the outer sides of the four wire cores are respectively provided with a buffer core, the inner wall of the buffer core is attached to the outer wall of the wire cores, the outer wall of the buffer core is attached to the inner wall of the compression resistant layer, buffer grooves are arranged at intervals on the inner wall of the buffer core, second ribs are arranged on the outer wall of the buffer core at intervals, second grooves are formed in the inner wall of the pressure-resistant layer and correspond to the second ribs in position, the second ribs are clamped in the second grooves, first buffer holes are formed in the intersection positions of the second ribs and the buffer core, and the core comprises a copper conductor and a crosslinked polyethylene insulating layer coated outside the copper conductor; the pressure-resistant layer and the pressure-bearing folded plate are made of nylon materials, and the buffer layer, the limiting core frame and the buffer core are made of TPE (thermoplastic elastomer) elastomer materials; the buffer layer comprises a circle of buffer ridges which are uniformly arranged on the periphery of the pressure-resistant layer at intervals, the buffer ridges are made of TPE (thermoplastic elastomer) elastomer materials, the cross sections of the buffer ridges are semicircular, the arc edges of the buffer ridges face outwards, a second buffer hole is formed in the middle of each buffer ridge, a heat-insulating core is filled between every two adjacent buffer ridges, and a first tensile core is embedded inside the heat-insulating core;
the sheath layer is made by cold-resistant polyvinyl chloride material, and the inside interval of sheath layer is inlayed and is equipped with round second tensile core.
Preferably, in order to improve the compressive strength of the limiting frame and further improve the compressive strength of the power cable, the middle part of the limiting frame is provided with a reinforcing core, and the reinforcing core is made of a nylon material. The nylon material has good mechanical properties, compression resistance, tensile resistance and excellent toughness.
Preferably, in order to improve the compressive strength of the limiting frame and further improve the compressive strength of the power cable, the compression plates are arranged inside the four supporting edges of the limiting frame respectively along the radial direction of the cable core, the cross sections of the compression plates are oval, and the compression plates are made of nylon materials.
Preferably, in order to improve the buffering effect to ambient pressure, and then promote power cable's compressive property, the inside of first bead is provided with the third buffering hole.
Preferably, in order to improve the tensile property of the power cable, the first tensile core and the second tensile core are aramid fiber ropes.
Preferably, in order to improve the cold resistance of the power cable, the cold-resistant layer is made of a ceramic fiber cotton material. The ceramic fiber cotton has the advantages of high strength, oxidation resistance, heat insulation and the like, and reduces the influence of the external low-temperature environment on the internal structure of the power cable.
Preferably, in order to improve the cold resistance of the power cable, the material of the heat preservation core is soft polyurethane foam. The soft polyurethane foam material has certain elasticity, can well buffer the external pressure, has good heat insulation performance, and reduces the influence of the external low-temperature environment on the internal structure of the power cable.
Preferably, in order to improve the compression resistance of the power cable, the armor layer is formed by wrapping galvanized steel strips.
The utility model has the following advantages:
(1) according to the utility model, the pressure-bearing strength of the power cable is improved through the arrangement of the pressure-bearing layer, the pressure-bearing folded plate, the reinforcing core and the reinforcing plate, meanwhile, the external pressure is buffered through the arrangement of the limiting frame, the buffer core and the buffer layer, and the arrangement of the first buffer hole, the second buffer hole, the third buffer hole and the buffer groove improves the pressure buffering effect, so that the pressure-bearing performance of the power cable is obviously improved, and the power cable is not easy to break or fracture when bearing the external pressure;
(2) according to the utility model, the sheath layer on the outermost layer of the power cable is made of a cold-resistant polyvinyl chloride material, the cold-resistant layer is arranged between the buffer layer and the armor layer, the heat-insulating core is filled between two adjacent buffer ridges in the buffer layer, the cold-resistant layer is made of a ceramic fiber cotton material, and the heat-insulating core is made of soft polyurethane foam, so that good heat insulation can be carried out through the arrangement of the cold-resistant layer and the heat-insulating core, and the influence of the internal structure of the power cable on the external low-temperature environment is reduced;
(3) according to the utility model, the first tensile core is embedded in the heat-insulating core, and the circle of second tensile core is embedded in the sheath layer at intervals, so that the tensile property of the power cable is improved, the power cable is not easy to damage or break when being pulled by external force, and the service life of the power cable is prolonged.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the stop;
FIG. 3 is a cross-sectional view of a cushion core;
FIG. 4 is a cross-sectional view of the crush resistant layer.
In the figure: 1. a cable core; 11. a limiting frame; 111. a reinforcing core; 112. a pressure resistant plate; 113. a first rib; 114. a containing groove; 12. a wire core; 121. a copper conductor; 122. a crosslinked polyethylene insulating layer; 2. a pressure resistant layer; 21. a first groove; 22. a second groove; 3. a buffer layer; 31. a buffering ridge; 32. a heat preservation core; 4. a cold-resistant layer; 5. an armor layer; 6. a sheath layer; 61. a second tensile core; 7. a third buffer hole; 8. pressure bearing folded plates; 9. a buffer core; 91. a buffer tank; 92. a second rib; 10. a first buffer hole; 100. a second buffer hole; 110. a first tensile core.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
Embodiment 1 discloses a cross-linked polyethylene insulated cold-resistant power cable, which comprises a cable core 1, and an anti-compression layer 2, a buffer layer 3, a cold-resistant layer 4, an armor layer 5 and a sheath layer 6 which are sequentially coated outside the cable core 1, wherein the cold-resistant layer 4 is made of a ceramic fiber cotton material, and the armor layer 5 is formed by wrapping a galvanized steel strip;
as shown in fig. 1, the cable core 1 comprises a limiting frame 11 and four wire cores 12; as shown in fig. 1 and 2, the cross-section of the limiting frame 11 is cross-shaped, the middle of the limiting frame 11 is provided with a reinforcing core 111, the inside of four supporting edges of the limiting frame 11 is respectively provided with a pressure-resistant plate 112 along the radial direction of the cable core 1, the cross-section of the pressure-resistant plate 112 is oval, the reinforcing core 111 and the pressure-resistant plate 112 are both made of nylon material, the outer ends of the four supporting edges of the limiting frame 11 are respectively provided with a first rib 113, the cross-section of the first rib 113 is fan-shaped, the width of the outer end of the first rib 113 is greater than that of the inner end of the first rib, the inner wall of the pressure-resistant layer 2 is provided with a first groove 21 corresponding to the position of the first rib 113, the outer end of the first rib 113 is respectively clamped in the first groove 21, the inside of the first rib 113 is provided with a third buffer hole 7, the periphery of the limiting frame 11 is provided with four accommodating grooves 114, the cross-section of the cable core 12 is fan-shaped, and the four cable cores 12 are respectively arranged in the four accommodating grooves 114 with outward arc edges, pressure-bearing folded plates 8 are arranged between the four wire cores 12 and the limiting frame 11, an included angle between two folded edges of each pressure-bearing folded plate 8 is 90 degrees, buffer cores 9 are arranged on the outer sides of the four wire cores 12, the inner walls of the buffer cores 9 are attached to the outer walls of the wire cores 12, and the outer walls of the buffer cores 9 are attached to the inner walls of the compression-resistant layer 2; as shown in fig. 1, 3 and 4, the inner wall of the buffer core 9 is provided with buffer grooves 91 at intervals, the outer wall of the buffer core 9 is provided with second ribs 92 at intervals, the inner wall of the compression-resistant layer 2 is provided with second grooves 22 corresponding to the second ribs, the second ribs 92 are clamped in the second grooves 22, the intersection of the second ribs 92 and the buffer core 9 is provided with first buffer holes 10, and the core 12 includes a copper conductor 121 and a crosslinked polyethylene insulating layer 122 coated outside the copper conductor 121;
the pressure-resistant layer 2 and the pressure-bearing folded plate 8 are made of nylon materials, and the buffer layer 3, the limiting frame 11 and the buffer core 9 are made of TPE elastomer materials;
as shown in fig. 1, the buffer layer 3 includes a circle of buffer ridges 31 uniformly arranged at intervals on the periphery of the pressure-resistant layer, the buffer ridges 31 are made of TPE elastomer material, the cross section of each buffer ridge 31 is semicircular, the arc edge of each buffer ridge 31 faces outward, a second buffer hole 100 is arranged in the middle of each buffer ridge 31, a heat-insulating core 32 is filled between every two adjacent buffer ridges 31, the heat-insulating core 32 is made of soft polyurethane foam, and a first tensile core 110 is embedded inside the heat-insulating core 32;
the sheath layer 6 is made of cold-resistant polyvinyl chloride material, as shown in fig. 1, a circle of second tensile core 61 is embedded in the sheath layer 6 at intervals, and the first tensile core 110 and the second tensile core 61 are aramid fiber ropes.
The principle of the utility model is as follows: the cable comprises a cable core 1, a limiting frame 11 is arranged inside the cable core 1, four cable cores 12 are respectively arranged in four accommodating grooves 114 on the periphery of the limiting frame 11, a pressure-bearing folded plate 8 is arranged between the cable cores 12 and the limiting frame 11, a buffer core 9 is arranged on the outer side of each cable core 12, a pressure-resistant layer 2 is arranged outside the cable core 1, a buffer layer 3 is arranged outside the pressure-resistant layer 2, a reinforcing core 111 is arranged in the middle of the limiting frame 11, pressure-resistant plates 112 are respectively arranged inside four supporting edges of the limiting frame 11 along the radial direction of the cable core 1, the pressure-resistant layers 2, the pressure-bearing folded plate 8, the reinforcing core 111 and the pressure-resistant plates 112 are all made of nylon materials, and the nylon materials have good mechanical properties, pressure resistance and tensile properties and excellent toughness, so that the pressure-bearing capacity of a power cable is improved; the buffer layer 3, the buffer core 9 and the limiting frame 11 are all made of TPE (thermoplastic elastomer) elastic materials which are good in elasticity and capable of buffering external pressure well and improving the protection effect on the wire cores, and the arrangement of the first buffer hole 10, the second buffer hole 100, the third buffer hole 7 and the buffer groove 91 improves the buffering effect; the sheath layer 6 on the outermost layer of the power cable is made of a cold-resistant polyvinyl chloride material, the cold-resistant layer 4 is arranged between the buffer layer 3 and the armor layer 5, the heat-insulation core 32 is filled between two adjacent buffer ridges 31 in the buffer layer 3, the cold-resistant layer 4 is made of a ceramic fiber cotton material, the heat-insulation core 32 is made of a soft polyurethane foam, and both the ceramic fiber cotton and the soft polyurethane foam have the characteristics of heat insulation, so that good heat insulation can be realized through the arrangement of the cold-resistant layer 4 and the heat-insulation core 32, and the influence of the internal structure of the power cable on the external low-temperature environment is reduced; the arrangement of the first tensile core 110 in the heat preservation core 32 and the second tensile core 61 in the sheath layer 6 also obviously improves the tensile property of the power cable.
Claims (8)
1. The cross-linked polyethylene insulated cold-resistant power cable is characterized by comprising a cable core, and a compression-resistant layer, a buffer layer, a cold-resistant layer, an armor layer and a sheath layer which are sequentially coated outside the cable core;
the cable core comprises a limiting frame and four wire cores, the cross section of the limiting frame is in a cross shape, the outer ends of four supporting edges of the limiting frame are respectively provided with a first convex edge, the cross section of the first convex edge is in a fan shape, the width of the outer end of the first convex edge is larger than that of the inner end of the first convex edge, the inner wall of the pressure-resistant layer is provided with a first groove corresponding to the position of the first convex edge, the outer end of the first convex edge is respectively clamped in the first groove, the periphery of the limiting frame is provided with four accommodating grooves, the cross section of the wire cores is in a fan shape, the four wire cores are respectively arranged in the four accommodating grooves in an arc edge manner, pressure-bearing folded plates are arranged between the four wire cores and the limiting frame outwards, the included angle between two folded edges of each pressure-bearing folded plate is 90 degrees, the outer sides of the four wire cores are respectively provided with buffer cores, and the inner walls of the buffer cores are attached to the outer walls of the wire cores, the outer wall of the buffer core is attached to the inner wall of the pressure-resistant layer, buffer grooves are arranged on the inner wall of the buffer core at intervals, second convex edges are arranged on the outer wall of the buffer core at intervals, second grooves are arranged on the inner wall of the pressure-resistant layer and correspond to the second convex edges in position, the second convex edges are clamped in the second grooves, first buffer holes are formed in the intersection positions of the second convex edges and the buffer core, and the wire core comprises a copper conductor and a crosslinked polyethylene insulating layer coated outside the copper conductor;
the pressure-resistant layer and the pressure-bearing folded plate are made of nylon materials, and the buffer layer, the limiting frame and the buffer core are made of TPE (thermoplastic elastomer) materials;
the buffer layer comprises a circle of buffer ridges which are uniformly arranged on the periphery of the pressure-resistant layer at intervals, the buffer ridges are made of TPE (thermoplastic elastomer) elastomer materials, the cross sections of the buffer ridges are semicircular, the arc edges of the buffer ridges face outwards, a second buffer hole is formed in the middle of each buffer ridge, a heat-insulating core is filled between every two adjacent buffer ridges, and a first tensile core is embedded in each heat-insulating core;
the sheath layer is made of cold-resistant polyvinyl chloride materials, and a circle of second tensile cores are embedded in the sheath layer at intervals.
2. The cross-linked polyethylene insulated cold-resistant power cable as claimed in claim 1, wherein a reinforcing core is arranged in the middle of the limiting frame, and the reinforcing core is made of nylon material.
3. The cross-linked polyethylene insulated cold-resistant power cable as claimed in claim 1, wherein pressure-resistant plates are respectively arranged inside the four supporting edges of the limiting frame along the radial direction of the cable core, the cross section of each pressure-resistant plate is oval, and the pressure-resistant plates are made of nylon materials.
4. The insulated cold-resistant crosslinked polyethylene power cable as claimed in claim 1, wherein the first rib is provided with a third buffer hole inside.
5. The cross-linked polyethylene insulated cold-resistant power cable as claimed in claim 1, wherein the first tensile core and the second tensile core are aramid fiber ropes.
6. The cross-linked polyethylene insulated cold-resistant power cable as claimed in claim 1, wherein the cold-resistant layer is made of ceramic fiber cotton material.
7. The cross-linked polyethylene insulated cold-resistant power cable as claimed in claim 1, wherein the material of the thermal insulation core is flexible polyurethane foam.
8. The cross-linked polyethylene insulated cold-resistant power cable of claim 1, wherein the armor layer is wrapped by galvanized steel tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121813905.2U CN215577804U (en) | 2021-08-05 | 2021-08-05 | Cross-linked polyethylene insulated cold-resistant power cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121813905.2U CN215577804U (en) | 2021-08-05 | 2021-08-05 | Cross-linked polyethylene insulated cold-resistant power cable |
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| CN215577804U true CN215577804U (en) | 2022-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117877790A (en) * | 2024-03-11 | 2024-04-12 | 四川省万阳电缆有限公司 | High-strength cable based on copper alloy material and manufacturing method |
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2021
- 2021-08-05 CN CN202121813905.2U patent/CN215577804U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117877790A (en) * | 2024-03-11 | 2024-04-12 | 四川省万阳电缆有限公司 | High-strength cable based on copper alloy material and manufacturing method |
| CN117877790B (en) * | 2024-03-11 | 2024-05-24 | 四川省万阳电缆有限公司 | High-strength cable based on copper alloy material and manufacturing method |
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