CN213660042U - Crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheath power cable - Google Patents

Abstract

The utility model discloses a crosslinked polyethylene insulating flame-retardant polyvinyl chloride sheath power cable, which comprises a cable core, an inner liner, a toughening layer, a braided reinforcing layer, an armor layer and a sheath layer, wherein the inner liner, the toughening layer, the braided reinforcing layer, the armor layer and the sheath layer are sequentially coated outside the cable core; the cable core comprises a limiting core and four insulating wire cores, compression plates are respectively arranged between the insulating wire cores and the lining layer, first buffer holes are formed in the compression plates at intervals, filling layers are respectively arranged between the cable core and two adjacent compression plates, and first toughening cores are embedded in the filling layers; the insulating wire core comprises a copper conductor and an insulating layer coated outside the copper conductor, and a circle of second toughening cores are embedded in the insulating layer at intervals; a circle of third grooves are formed in the inner wall of the sheath layer at intervals, and third toughening cores are arranged in the third grooves respectively; the interval is provided with the round bead on the outer wall of restrictive coating, and the handing-over department of bead and restrictive coating is provided with the second cushion hole respectively. The utility model discloses aim at solving the poor, the weak problem of compressive capacity of current power cable toughness.

Description

Crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheath power cable

Technical Field

The utility model relates to a power cable technical field especially relates to a fire-retardant polyvinyl chloride sheath power cable of crosslinked polyethylene insulation.

Background

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.

Among the prior art, power cable has the toughness poor, the problem that compressive property is not enough, it is relatively poor to receive crooked and twist reverse back resilience when power cable, power cable appears being difficult to resume after great deformation, thereby can lead to the fact the damage to the inside structure of cable, current power cable can not be fine to the applied pressure in the external world buffering, its inner structure is also inseparable enough, when power cable received external extrusion force, deformation and damaged condition also appear easily in its inner structure, thereby power cable's just productive work and its life have been influenced.

To above technical problem, the utility model discloses a fire-retardant polyvinyl chloride sheath power cable of crosslinked polyethylene insulation, the utility model has the advantages of improve power cable's toughness, improve power cable's compressive property and extension power cable's life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, provides a crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheathed power cable to solve the problems of poor toughness and insufficient pressure resistance of the power cable in the prior art, when the power cable is bent and twisted, the resilience is poor, the power cable is difficult to recover after large deformation occurs, thereby causing damage to the internal structure of the cable, the existing power cable can not buffer the pressure applied to the outside, the internal structure of the cable is not compact enough, when the power cable receives external extrusion force, the internal structure of the cable is easy to deform and damage, thereby influenced power cable's just productive work and its life, the utility model has the advantages of improve power cable's toughness, improve power cable's compressive property and extension power cable's life.

The utility model discloses a following technical scheme realizes: the utility model discloses a crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheath power cable, which comprises a cable core, an inner liner, a toughening layer, a braided reinforcing layer, an armor layer and a sheath layer, wherein the inner liner, the toughening layer, the braided reinforcing layer, the armor layer and the sheath layer are sequentially coated outside the cable core, and the sheath layer is made of flame-retardant polyvinyl chloride material; the cable core comprises a limiting core and four insulating wire cores, the cross section of the limiting core is in a quadrangular shape, first grooves are formed in four side faces of the limiting core respectively, the lower side parts of the four insulating wire cores are clamped and limited in the first grooves respectively, pressure-resistant plates are arranged between the insulating wire cores and the inner liner respectively, the outer sides of the pressure-resistant plates are provided with cambered surfaces and are closely attached to the inner wall of the inner liner, second grooves are formed in the inner sides of the pressure-resistant plates and correspond to the positions of the insulating wire cores, the upper side parts of the insulating wire cores are clamped and limited in the second grooves respectively, two adjacent pressure-resistant plates are contacted with each other, first buffer holes distributed in an arc shape are formed in the inner portions of the pressure-resistant plates at intervals, the toughening layer, the limiting core and the pressure-resistant plates are made of TPU elastomer materials, filling layers are arranged between the cable core and the; the insulating wire core comprises a copper conductor and an insulating layer coated outside the copper conductor, a circle of second toughening core is embedded in the insulating layer at intervals, and the insulating layer is made of a cross-linked polyethylene material; a circle of tensile cores are embedded in the toughening layer at intervals; a circle of third grooves are formed in the inner wall of the sheath layer at intervals, third toughening cores are arranged in the third grooves respectively, and the first toughening core, the second toughening core and the third toughening core are made of nylon materials; the interval is provided with the round bead on the outer wall of restrictive coating, and the handing-over department of bead and restrictive coating is provided with the second cushion hole respectively.

Preferably, the cross-section of the rib is "trapezoidal" in order to improve the pressure resistance of the power cable.

Preferably, the filling layer is filled with polypropylene tear-net filling strings.

Preferably, in order to improve the tensile property of the power cable, the tensile core is an aramid fiber rope.

Preferably, the inner liner is formed by wrapping a PVC belt.

Preferably, in order to improve the structural strength and the tensile property of the power cable, the woven reinforcing layer is woven by aramid fibers.

Preferably, the armor layer is formed by wrapping galvanized steel strips.

The utility model has the advantages of it is following:

(1) the utility model discloses in, the middle part of cable core is provided with spacing core, be provided with the resistance to compression board between insulation core and the inner liner respectively, the outside of inner liner is provided with toughening layer, spacing core, resistance to compression board and toughening layer all adopt TPU elastomer material to make, be provided with the filling layer between cable core and two adjacent resistance to compression boards respectively, all inlay in the filling layer and be equipped with first toughening core, the insulating layer interval is embedded to be equipped with round second toughening core, be provided with third toughening core in the third recess respectively, first toughening core, second toughening core and third toughening core all adopt nylon materials to make, thereby the toughness of power cable has been showing to be promoted;

(2) in the utility model, the arrangement of the limiting core and the pressure-resistant plate well supports, limits and protects the insulated wire core, meanwhile, the limit core, the compression plate are matched with the filling layer and the lining layer to improve the tightness of the interior of the power cable, the first buffer holes distributed in an arc shape are arranged at intervals in the compression plate, a circle of convex edges are arranged at intervals on the outer wall of the sheath layer, second buffer holes are respectively arranged at the joints of the convex edges and the sheath layer to further improve the buffer effect on the external pressure, a weaving reinforced layer is arranged between the toughening layer and the armor layer, the constraint and the reinforced protection on the internal structure of the power cable are improved through the weaving reinforced layer, the compression resistance of the power cable is remarkably improved, the internal structure of the power cable is not easy to deform and damage when the power cable is subjected to external extrusion force, and the service life of the power cable is prolonged;

(3) the utility model discloses in, the setting of weaving the enhancement layer and toughening the inside tensile core of layer still is showing the tensile strength who has promoted power cable.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of a spacing core;

FIG. 3 is a cross-sectional view of the compression plate;

fig. 4 is a cross-sectional view of the jacket layer.

In the figure: 1. a cable core; 11. a limiting core; 111. a first groove; 12. an insulated wire core; 121. a copper conductor; 122. an insulating layer; 2. an inner liner layer; 3. a toughening layer; 31. a tensile core; 4. weaving the reinforcing layer; 5. an armor layer; 6. a sheath layer; 61. a third groove; 62. a rib; 7. a pressure resistant plate; 71. a second groove; 72. a first buffer hole; 8. a filling layer; 81. a first toughening core; 9. a second toughening core; 10. a third toughening core; 100. a second buffer hole.

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 crosslinked polyethylene insulated flame-retardant polyvinyl chloride sheathed power cable, which comprises a cable core 1, and an inner liner layer 2, a toughening layer 3, a braided reinforcing layer 4, an armor layer 5 and a sheath layer 6 which are sequentially coated outside the cable core 1, wherein the inner liner layer 2 is formed by wrapping a PVC (polyvinyl chloride) belt, the braided reinforcing layer 4 is formed by braiding aramid fibers, the armor layer 5 is formed by wrapping a galvanized steel belt, and the sheath layer 6 is made of a flame-retardant polyvinyl chloride material; the cable core 1 comprises a limiting core 11 and four insulating wire cores 12, and the cross section of the limiting core 11 is in a quadrangular shape; as shown in fig. 2, four side surfaces of the limiting core 11 are respectively provided with a first groove 111; as shown in fig. 1, the lower side portions of the four insulated wire cores 12 are respectively clamped and limited in the first grooves 111, and pressure-resistant plates 7 are respectively arranged between the insulated wire cores 12 and the lining layer 2; as shown in fig. 1 and 3, the outer side of each compression plate 7 is provided with an arc surface and is tightly attached to the inner wall of the lining layer 2, the inner side of each compression plate 7 is provided with a second groove 71 corresponding to the position of the insulated wire core 12, the upper side parts of the insulated wire cores 12 are respectively clamped and limited in the second grooves 71, two adjacent compression plates 7 are in contact with each other, first buffer holes 72 distributed in an arc shape are arranged in the compression plates 7 at intervals, the toughening layer 3, the limiting core 11 and the compression plates 7 are all made of TPU elastomer materials, a filling layer 8 is respectively arranged between the cable core 1 and two adjacent compression plates 7, the filling layer 8 is filled with a polypropylene tearing reticular filling rope, and a first toughening core 81 is embedded in each filling layer 8; the insulating wire core 12 comprises a copper conductor 121 and an insulating layer 122 coated outside the copper conductor 121, a circle of second toughening cores 9 is embedded in the insulating layer 122 at intervals, and the insulating layer 122 is made of a cross-linked polyethylene material; a circle of tensile core 31 is embedded in the toughening layer 3 at intervals, and the tensile core 31 is an aramid fiber rope; as shown in fig. 1 and 4, a circle of third grooves 61 are arranged on the inner wall of the sheath layer 6 at intervals, third toughening cores 10 are respectively arranged in the third grooves 61, and the first toughening core 81, the second toughening core 9 and the third toughening core 10 are all made of nylon materials; the interval is provided with round bead 62 on the outer wall of restrictive coating 6, and bead 62's cross-section is "trapezoidal", and bead 62 and restrictive coating 6 handing-over department are provided with second buffer hole 100 respectively.

The principle of the utility model is as follows: in the utility model, the middle part of the cable core 1 is provided with a limiting core 11, a pressure-resistant plate 7 is respectively arranged between the insulating wire core 12 and the inner liner 2, a toughening layer 3 is arranged outside the inner liner 2, the limiting core 11, the pressure-resistant plate 7 and the toughening layer 3 are all made of TPU elastomer materials, a filling layer 8 is respectively arranged between the cable core 1 and two adjacent pressure-resistant plates 7, a first toughening core 81 is embedded in the filling layer 8, a circle of second toughening core 9 is embedded in the insulating layer 122 at intervals, a third toughening core 10 is respectively arranged in the third groove 61, the first toughening core 81, the second toughening core 9 and the third toughening core 10 are all made of nylon materials, so that the toughness of the power cable is obviously improved; in the utility model, the arrangement of the spacing core 11 and the compression-resistant plate 7 can well support, limit and protect the insulation core 12, and can well buffer the pressure, at the same time, the spacing core 11, the compression-resistant plate 7 cooperate with the filling layer 8 and the lining layer 2 to improve the tightness of the power cable interior, the internal interval of the compression-resistant plate 7 is provided with the first buffer holes 72 distributed in an arc shape, the outer wall of the sheath layer 6 is provided with a circle of convex edges 62 at intervals, the joints of the convex edges 62 and the sheath layer 6 are respectively provided with the second buffer holes 100 to further improve the buffer effect to the external pressure, the weaving reinforced layer 4 is arranged between the toughened layer 3 and the armor layer 5, the constraint and the reinforced protection to the internal structure of the power cable are improved by weaving the reinforced layer 4, thereby the compression-resistant performance of the power cable is obviously improved, the internal structure of the power cable is not easy to deform, the service life of the power cable is prolonged; the utility model discloses in, weave the enhancement layer 4 and the setting of 3 inside tensile cores 31 on toughened layer still show the tensile strength who has promoted power cable.

Claims (7)

1. The power cable with the crosslinked polyethylene insulating flame-retardant polyvinyl chloride sheath is characterized by comprising a cable core, and an inner liner, a toughening layer, a braided reinforcing layer, an armor layer and a sheath layer which are sequentially coated outside the cable core, wherein the sheath layer is made of a flame-retardant polyvinyl chloride material;

the cable core comprises a limiting core and four insulating wire cores, the cross section of the limiting core is in a quadrangular shape, first grooves are respectively arranged on four side surfaces of the limiting core, the lower side parts of the four insulating wire cores are respectively clamped and limited in the first grooves, pressure resisting plates are respectively arranged between the insulating wire cores and the inner liner, the outer sides of the pressure resisting plates are provided with cambered surfaces and are closely attached to the inner wall of the inner liner, second grooves are arranged on the inner sides of the pressure resisting plates and correspond to the positions of the insulating wire cores, the upper side parts of the insulating wire cores are respectively clamped and limited in the second grooves, two adjacent pressure resisting plates are in contact with each other, first buffer holes distributed in an arc shape are arranged in the inner space of the pressure resisting plates at intervals, the toughening layers, the limiting cores and the pressure resisting plates are all made of TPU elastomer materials, and filling layers are respectively arranged between the cable core and the two adjacent pressure resisting plates, a first toughening core is embedded in each filling layer;

the insulating wire core comprises a copper conductor and an insulating layer coated outside the copper conductor, a circle of second toughening core is embedded in the insulating layer at intervals, and the insulating layer is made of a cross-linked polyethylene material;

a circle of tensile cores are embedded in the toughening layer at intervals;

a circle of third grooves are formed in the inner wall of the sheath layer at intervals, third toughening cores are arranged in the third grooves respectively, and the first toughening cores, the second toughening cores and the third toughening cores are made of nylon materials; the interval is provided with the round bead on the outer wall of restrictive coating, the bead with the handing-over department of restrictive coating is provided with the second cushion hole respectively.

2. The crosslinked polyethylene insulated flame retardant polyvinyl chloride jacketed power cable of claim 1, wherein the cross section of the said ribs is "trapezoidal".

3. The power cable as claimed in claim 1, wherein the filler layer is filled with polypropylene ripened reticular filler cord.

4. The crosslinked polyethylene insulated flame retardant polyvinyl chloride jacketed power cable of claim 1, wherein the tensile core is aramid fiber rope.

5. The power cable with the cross-linked polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein the inner liner layer is wrapped by a PVC tape.

6. The power cable with the cross-linked polyethylene insulating flame-retardant polyvinyl chloride sheath as claimed in claim 1, wherein the braided reinforcing layer is braided with aramid fibers.

7. The crosslinked polyethylene insulated flame retardant polyvinyl chloride jacketed power cable of claim 1, wherein the armor layer is wrapped with galvanized steel tape.

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