CN213519289U - Medium-voltage power cable for cross-linked polyethylene insulated rail transit - Google Patents
Medium-voltage power cable for cross-linked polyethylene insulated rail transit Download PDFInfo
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- CN213519289U CN213519289U CN202022920303.9U CN202022920303U CN213519289U CN 213519289 U CN213519289 U CN 213519289U CN 202022920303 U CN202022920303 U CN 202022920303U CN 213519289 U CN213519289 U CN 213519289U
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Abstract
The utility model discloses a medium-voltage power cable for cross-linked polyethylene insulated rail transit, which comprises a conductor, an inner shielding layer, an insulating layer, an outer shielding layer, a total shielding layer, a first water-resistant layer, a first flame-retardant layer, an inner sheath layer, a toughening layer, a second water-resistant layer, an armor layer, a second flame-retardant layer, a tensile layer and an outer sheath layer, wherein the inner shielding layer, the insulating layer, the outer shielding layer, the total shielding layer, the first water-resistant layer, the first flame-retardant layer, the; a first tensile core is embedded in the conductor; first grooves are formed in the outer wall of the inner sheath layer at intervals, second grooves are formed in the inner wall of the toughening layer and correspond to the first grooves, anti-torsion ribs are arranged in the first grooves and the second grooves, and buffer holes are formed in the inner sheath layer at intervals; second tensile cores are embedded in the toughening layers at intervals; the third tensile core is embedded in the outer sheath layer at intervals, the wear-resistant convex edges are arranged on the outer wall of the outer sheath layer at intervals, and the fourth tensile core is embedded in the wear-resistant convex edges. The utility model discloses it is poor with antitorque commentaries on classics performance to aim at solving current middling pressure power cable for track traffic tensile, waterproof flame retardant properties not enough problem.
Description
Technical Field
The utility model relates to a power cable technical field especially relates to a middling pressure power cable for cross-linked polyethylene insulation track traffic.
Background
The power cable is used for transmitting and distributing electric energy and can be divided into medium and low voltage power cables (35 kilovolts and below), high voltage cables (more than 110 kilovolts), ultrahigh voltage cables (275-800 kilovolts) and extra-high voltage cables (more than 1000 kilovolts) according to voltage grades, and the medium voltage power cable for rail transit is applied to the field of rail transit for transmitting and distributing electric energy.
Medium voltage power cable often receives to drag and twist reverse laying for the track traffic, and medium voltage power cable for the track traffic of current exists not enoughly in tensile and antitorque commentaries on classics performance, receives continuous dragging and frequent torsion back when the cable, and the restrictive coating of cable and inside structure are damaged easily to the life of cable has been influenced, in addition, medium voltage power cable also exists not enoughly on waterproof and fire behaviour for the current track traffic, and the life of cable is short.
To above technical problem, the utility model discloses a crosslinked polyethylene is middling pressure power cable for insulation track traffic, the utility model has the advantages of improve middling pressure power cable for track traffic's tensile and antitorque twist property, improve middling pressure power cable for track traffic waterproof and fire behaviour, extension cable's life.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, a middling pressure power cable for cross-linked polyethylene insulation track traffic is provided, with solve among the prior art middling pressure power cable for track traffic and exist inadequately in tensile and antitorque commentaries on classics performance, receive continuous dragging and frequent back of twisting reverse when the cable, the restrictive coating of cable and inside structure are damaged easily, thereby influenced the life of cable, in addition, current middling pressure power cable for track traffic also exists inadequately on waterproof and flame retardant property, the technical problem such as the life of cable is short, the utility model has the advantages of improve the tensile and the antitorque commentaries on classics performance of middling pressure power cable for track traffic, improve waterproof and flame retardant property of middling pressure power cable for track traffic, the life of extension cable.
The utility model discloses a following technical scheme realizes: the utility model discloses a crosslinked polyethylene insulation track traffic is with middling pressure power cable, including the conductor and cladding in proper order outside the conductor internal shield layer, insulating layer, outer shield layer, total shield layer, first water blocking layer, first fire-retardant layer, inner sheath layer, toughening layer, second water blocking layer, armor, second fire-retardant layer, tensile layer and oversheath layer, the conductor is the stranded copper conductor, the material of internal shield layer and outer shield layer is semiconductive material, the insulating layer adopts crosslinked polyethylene material to make, inner sheath layer and oversheath layer all adopt low smoke and zero halogen fire-retardant polyolefin material to make; a first tensile core is embedded in the conductor; first grooves are formed in the outer wall of the inner sheath layer at intervals, second grooves are formed in the inner wall of the toughening layer at intervals corresponding to the first grooves, anti-torsion ribs are arranged in the first grooves and the second grooves, buffer holes are formed in the inner sheath layer at intervals, and the buffer holes and the anti-torsion ribs are arranged in a staggered mode; second tensile cores are embedded in the toughening layers at intervals, and the second tensile cores and the anti-torque ribs are arranged in a staggered mode; the third tensile core is embedded in the outer sheath layer at intervals, the wear-resistant convex edges are arranged on the outer wall of the outer sheath layer at intervals, and the fourth tensile core is embedded in the wear-resistant convex edges.
Preferably, in order to improve the torsion resistance and the wear resistance of the cable, the sections of the torsion-resistant rib and the wear-resistant rib are trapezoidal.
Preferably, in order to improve the toughness of the cable, the toughening layer is made of a thermoplastic elastomer material.
Preferably, in order to improve the tensile property of the cable, the first tensile core, the second tensile core, the third tensile core and the fourth tensile core are aramid fiber ropes.
Preferably, in order to improve the waterproof performance of the cable, the first waterproof layer and the second waterproof layer are both formed by wrapping a waterproof tape.
Preferably, in order to improve the flame retardant property of the cable, the first flame-retardant layer and the second flame-retardant layer are both formed by wrapping a flame-retardant belt.
Preferably, in order to improve the torsion resistance of the cable, the torsion-resistant rib is made of a PVC material.
Preferably, in order to improve the tensile property of the cable, the tensile layer is formed by weaving aramid fibers.
Preferably, the armor layer is formed by wrapping stainless steel bands.
Preferably, the total shielding layer is formed by wrapping a copper strip.
The utility model has the advantages of it is following:
(1) the utility model discloses in, the interval is provided with first recess on the outer wall of inner sheath layer, be provided with the second recess with the interval that first recess position corresponds on the inner wall of toughening layer, be provided with antitorque bead in first recess and the second recess, the interval is provided with wear-resisting bead on the outer wall of outer sheath layer, wear-resisting bead can improve the wear resistance of cable, and simultaneously, the torsional force that the cable received can be resisted to the setting of wear-resisting bead and antitorque bead, prevent the serious torsion condition of cable when the cable receives the torsional force, in addition, the buffering hole in the inner sheath layer also can further cushion the torsional force, the toughness of cable is improved in the setting of toughening layer, make the cable can return the original state fast after the torsion appears, thereby, fine protection the inner structure of cable, the life of cable has been prolonged;
(2) in the utility model, the first tensile core is embedded in the conductor, the second tensile core is embedded in the toughening layer at intervals, the third tensile core is embedded in the outer sheath layer at intervals, the fourth tensile core is embedded in the wear-resistant bead, and the tensile layer is also arranged between the second flame-retardant layer and the outer sheath layer, so that the tensile property of the cable is obviously improved, and when the cable is subjected to pulling force, the cable is not easy to damage and break, thereby prolonging the service life of the cable;
(3) the utility model discloses thereby well first water blocking layer, first fire-retardant layer, second water blocking layer and the fire-retardant layer of second have set gradually in the outside of conductor realize multistage waterproof and fire-retardant, are showing the waterproof flame retardant property who has promoted the cable, have prolonged the life of cable.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the inner jacket layer;
FIG. 3 is a cross-sectional view of a toughening layer.
In the figure: 1. a conductor; 2. an inner shield layer; 3. an insulating layer; 4. an outer shield layer; 5. a total shielding layer; 6. a first water resistant layer; 7. a first flame retardant layer; 8. an inner jacket layer; 81. a first groove; 82. a buffer hole; 9. a toughening layer; 91. a second groove; 92. a second tensile core; 10. a second water resistant layer; 100. an armor layer; 110. a second flame retardant layer; 120. a tensile layer; 130. an outer jacket layer; 140. a first tensile core; 150. an anti-torque rib; 160. a third tensile core; 170. wear-resistant ribs; 180. and a fourth tensile core.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
Embodiment 1 discloses a medium voltage power cable for cross-linked polyethylene insulated rail transit, as shown in fig. 1, comprising a conductor 1, and an inner shield layer 2, an insulating layer 3, an outer shield layer 4, a total shield layer 5, a first water-resistant layer 6, a first flame-retardant layer 7, an inner sheath layer 8, a toughening layer 9, a second water-resistant layer 10, an armor layer 100, a second flame-retardant layer 110, a tensile layer 120 and an outer sheath layer 130 which are sequentially coated outside the conductor 1, wherein the conductor 1 is a stranded copper conductor, the inner shield layer 2 and the outer shield layer 4 are both made of semiconductive materials, the insulating layer 3 is made of cross-linked polyethylene material, the total shield layer 5 is made of copper strip, the toughening layer 9 is made of thermoplastic elastomer material, the first water-resistant layer 6 and the second water-resistant layer 10 are both made of water-resistant tape, the armor layer 100 is made of stainless steel strip, the first flame-retardant layer 7 and the second flame-retardant layer 110 are both made of flame-resistant tape, the tensile layer 120 is woven by aramid fiber, and the inner sheath layer 8 and the outer sheath layer 130 are both made of low-smoke halogen-free flame-retardant polyolefin materials; a first tensile core 140 is embedded in the conductor 1; first grooves 81 are formed in the outer wall of the inner sheath layer 8 at intervals, second grooves 91 are formed in the inner wall of the toughening layer 9 at intervals corresponding to the positions of the first grooves 81, anti-torsion ribs 150 are arranged in the first grooves 81 and the second grooves 91, the anti-torsion ribs 150 are made of PVC materials, buffer holes 82 are formed in the inner sheath layer 8 at intervals, and the buffer holes 82 and the anti-torsion ribs 150 are arranged in a staggered mode; second tensile cores 92 are embedded in the toughening layer 9 at intervals, and the second tensile cores 92 and the anti-torque ribs 150 are arranged in a staggered mode; third tensile cores 160 are embedded in the outer sheath layer 130 at intervals, wear-resistant ribs 170 are arranged on the outer wall of the outer sheath layer 130 at intervals, the cross sections of the anti-torque ribs 150 and the wear-resistant ribs 170 are trapezoidal, fourth tensile cores 180 are embedded in the wear-resistant ribs 170, and the first tensile cores 140, the second tensile cores 92, the third tensile cores 160 and the fourth tensile cores 180 are aramid fiber ropes.
The principle of the utility model is as follows: in the utility model, the outer wall of the inner sheath layer 8 is provided with first grooves 81 at intervals, the inner wall of the toughening layer 9 is provided with second grooves 91 at intervals corresponding to the positions of the first grooves 81, anti-twisting ribs 150 are arranged in the first grooves 81 and the second grooves 91, the outer wall of the outer sheath layer 130 is provided with wear-resistant ribs 170 at intervals, the wear-resistant ribs 170 can improve the wear resistance of the cable, meanwhile, the arrangement of the wear-resistant rib 170 and the anti-twisting rib 150 can resist the twisting force applied to the cable, the cable is prevented from being seriously twisted when the cable is subjected to twisting force, in addition, the buffering holes 82 in the inner sheath layer 8 can further buffer the twisting force, and the arrangement of the toughening layer 9 improves the toughness of the cable, so that the cable can be quickly restored after being twisted, thereby well protecting the internal structure of the cable and prolonging the service life of the cable; in the utility model, the first tensile core 140 is embedded in the conductor 1, the second tensile core 92 is embedded in the toughening layer 9 at intervals, the third tensile core 160 is embedded in the outer sheath layer 130 at intervals, the fourth tensile core 180 is embedded in the wear-resistant rib 170, and the tensile layer 120 is also arranged between the second flame-retardant layer 110 and the outer sheath layer 130, so that the tensile property of the cable is obviously improved, and when the cable is subjected to pulling force, the cable is not easy to be damaged or broken, thereby prolonging the service life of the cable; the utility model discloses thereby well first water blocking layer 6, first fire-retardant layer 7, second water blocking layer 10 and the fire-retardant layer 110 of second have set gradually in conductor 1's outside realize multistage waterproof and fire-retardant, are showing the waterproof flame retardant property who has promoted the cable, have prolonged the life of cable.
Claims (10)
1. The medium-voltage power cable for the cross-linked polyethylene insulated track traffic is characterized by comprising a conductor, an inner shielding layer, an insulating layer, an outer shielding layer, a total shielding layer, a first water-resistant layer, a first flame-retardant layer, an inner sheath layer, a toughening layer, a second water-resistant layer, an armor layer, a second flame-retardant layer, a tensile layer and an outer sheath layer, wherein the inner shielding layer, the insulating layer, the outer shielding layer, the inner shielding layer and the outer shielding layer are made of semiconductive materials;
a first tensile core is embedded in the conductor;
first grooves are formed in the outer wall of the inner sheath layer at intervals, second grooves are formed in the inner wall of the toughening layer at intervals corresponding to the first grooves, anti-torque ribs are formed in the first grooves and the second grooves, buffer holes are formed in the inner sheath layer at intervals, and the buffer holes and the anti-torque ribs are arranged in a staggered mode;
second tensile cores are embedded in the toughening layers at intervals, and the second tensile cores and the anti-torque ribs are arranged in a staggered mode;
the inner wall of the outer sheath layer is provided with a third tensile core at intervals, the outer wall of the outer sheath layer is provided with a wear-resistant bead at intervals, and a fourth tensile core is embedded in the wear-resistant bead.
2. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the cross-section of the anti-twist rib and the cross-section of the wear-resistant rib are both "trapezoidal".
3. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the toughening layer is made of a thermoplastic elastomer material.
4. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the first tensile core, the second tensile core, the third tensile core and the fourth tensile core are aramid fiber ropes.
5. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the first water-blocking layer and the second water-blocking layer are wrapped by a water-blocking tape.
6. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the first flame retardant layer and the second flame retardant layer are wrapped with a flame retardant tape.
7. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the anti-twist rib is made of PVC material.
8. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the tensile layer is woven from aramid fibers.
9. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the armor layer is wrapped with stainless steel tape.
10. The medium voltage power cable for cross-linked polyethylene insulated rail transit of claim 1, wherein the total shield layer is wrapped with copper tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022920303.9U CN213519289U (en) | 2020-12-09 | 2020-12-09 | Medium-voltage power cable for cross-linked polyethylene insulated rail transit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022920303.9U CN213519289U (en) | 2020-12-09 | 2020-12-09 | Medium-voltage power cable for cross-linked polyethylene insulated rail transit |
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| CN213519289U true CN213519289U (en) | 2021-06-22 |
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| CN202022920303.9U Active CN213519289U (en) | 2020-12-09 | 2020-12-09 | Medium-voltage power cable for cross-linked polyethylene insulated rail transit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793726A (en) * | 2021-09-27 | 2021-12-14 | 云南多宝电缆集团股份有限公司 | Single-core modified polypropylene insulation alternating current 27.5KV electrified railway power cable |
| CN118609894A (en) * | 2024-07-04 | 2024-09-06 | 北京盛华卫泰电力科技有限公司 | High tensile cable |
-
2020
- 2020-12-09 CN CN202022920303.9U patent/CN213519289U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793726A (en) * | 2021-09-27 | 2021-12-14 | 云南多宝电缆集团股份有限公司 | Single-core modified polypropylene insulation alternating current 27.5KV electrified railway power cable |
| CN118609894A (en) * | 2024-07-04 | 2024-09-06 | 北京盛华卫泰电力科技有限公司 | High tensile cable |
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