CN216596989U

CN216596989U - Irradiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable

Info

Publication number: CN216596989U
Application number: CN202122994873.7U
Authority: CN
Inventors: 石学军; 程忠; 李远清; 马来智; 田兆亚
Original assignee: Anhui Honghai Cable Co ltd
Current assignee: Anhui Honghai Cable Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-24
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses an irradiation cross-linked polyethylene insulated polyolefin sheath long-service-life environment-friendly cable which comprises a cable core, a stable sleeve core and a partial pressure inner core, wherein the cable core consists of three insulated wires, each insulated wire consists of a conductor and an insulating layer coaxially extruded outside the conductor, the partial pressure inner core is arranged in the central hollow part of the cable core, the stable sleeve core is extruded on the outermost layer of the cable core, a wrapping layer is wrapped outside the stable sleeve core, and an outer sheath is extruded outside the wrapping layer; the outer sheath is composed of a mica fireproof layer, a waterproof layer and an anti-cracking sheath which are coaxially and sequentially extruded outside the wrapping layer. The utility model improves the problems of insufficient insulation and strength of the irradiation crosslinked cable in the prior art, and has the advantages of higher strength and insulation, prolonged service life of the cable and the like.

Description

Irradiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable

Technical Field

The utility model relates to the technical field of irradiation crosslinked cables, in particular to a long-service-life environment-friendly cable with an irradiation crosslinked polyethylene insulating polyolefin sheath.

Background

The irradiation crosslinking cable is a cable manufactured by using an irradiation crosslinking process, wherein the irradiation crosslinking is to use a high-energy electron beam generated by an electron accelerator to bombard an insulating layer to break molecular chains to form macromolecular free radicals, and then the macromolecular free radicals are recombined into crosslinking bonds, so that the original linear molecular structure is changed into a three-dimensional reticular molecular structure to form crosslinking; however, the insulation and strength of the existing radiation crosslinked cable still need to be further improved.

Aiming at the technical problems, the utility model discloses a long-service-life environment-friendly cable with an irradiation crosslinking polyethylene insulating polyolefin sheath, which has the advantages of higher strength and insulativity, longer service life of the cable and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, provides a long-service-life environment-friendly cable with an irradiation crosslinking polyethylene insulating polyolefin sheath, and solves the problem that the insulation and strength of the irradiation crosslinking cable in the prior art are insufficient. The utility model has the advantages of higher strength and insulation, prolonged service life of the cable and the like.

The utility model is realized by the following technical scheme: the utility model discloses an irradiation crosslinked polyethylene insulated polyolefin sheath long-service-life environment-friendly cable, which comprises a cable core, a stable sleeve core and a partial pressure inner core, wherein the cable core consists of three insulated wires, each insulated wire consists of a conductor and an insulating layer coaxially extruded outside the conductor, the partial pressure inner core is arranged in the hollow part of the center of the cable core, the stable sleeve core is extruded on the outermost layer of the cable core, a wrapping layer is wrapped outside the stable sleeve core, and an outer sheath is extruded outside the wrapping layer; the outer sheath is composed of a mica fireproof layer, a waterproof layer and an anti-cracking sheath which are coaxially and sequentially extruded outside the wrapping layer.

Further, when meetting external pressure for making the cable, shift pressure to partial pressure inner core, stabilize the cover core on, increase the life of sinle silk, stabilize the cover core and include three spacing curved cover that correspond with the insulated conductor position, be used for connecting the curved strip of resistance to compression of adjacent curved cover, still include along the axle center fix the bearing strip at curved strip center of resistance to compression, stabilize the cover core, be equipped with the stopping around the clearance between the covering, the stopping is alkali-free glass fiber rope.

Further, in order to facilitate sharing external pressure, the inner core is protected, the partial pressure inner core is of a hollow isosceles triangular prism structure, and three side ribs of the partial pressure inner core are fixed with the pressure bearing strip of the stable sleeve core.

Furthermore, in order to improve the roundness of the wire core, the stable sleeve core is coated on the outer walls of the three insulated wires of the cable core through a limiting curved sleeve, the adjacent surfaces of the three insulated wires are also attached to the external curved surface of the partial pressure inner core, and the stable sleeve core and the partial pressure inner core are made of elastomer materials.

Furthermore, in order to ensure that the cable is not damaged in the rolling process and has the compression-resistant buffering effect, the insulating layer is made of an irradiation cross-linked polyethylene material.

Furthermore, in order to increase the waterproof effect of the cable, the waterproof layer is made of water-blocking petroleum jelly, and the anti-cracking sheath is made of halogen-free low-smoke flame-retardant polyolefin material.

Furthermore, in order to achieve a better protection effect on the inside, the wrapping layer is a glass fiber tape.

The utility model has the following advantages:

(1) the voltage-dividing inner core and the stable sleeve core are fixed with each other in the cable, and are arranged on the periphery of the lead, the lead can be embedded between the voltage-dividing inner core and the stable sleeve core in an extrusion wrapping mode, and the voltage-dividing inner core and the stable sleeve core are fixed through the pressure-bearing strips, so that when the cable encounters external pressure, the pressure is transferred to the voltage-dividing inner core and the stable sleeve core, the roundness of the core is improved, and the service life of the cable is prolonged;

(2) according to the utility model, the anti-cracking sheath is made of the flame-retardant polyolefin material, and the material has the characteristics of good elasticity, high wear resistance, high compression resistance and good high and low temperature resistance, can improve the compression resistance of the cable, increases the wear resistance of the cable, enables the cable to have stronger space charge resistance and higher compression resistance, and can improve the compression resistance of the cable;

(3) the insulating layer is made of the irradiation crosslinking polyethylene material, the elastomer material has the characteristics of low smoke, zero halogen and flame retardance, high toughness, good insulativity, good elasticity and the like, the problem that the insulativity and strength of the irradiation crosslinking cable in the prior art are insufficient is solved, the cable is guaranteed not to be damaged in the rolling process, and the compression-resistant buffering effect is achieved.

Drawings

FIG. 1 is a schematic side sectional view of the present invention;

FIG. 2 is a schematic view of the connection structure of the partial pressure inner core and the stable sleeve core of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

In the figure: 1. a cable core; 2. an outer sheath; 201. a mica fire-resistant layer; 202. a waterproof layer; 203. a crack resistant sheath; 3. dividing the pressure of the inner core; 4. stabilizing the sleeve core; 5. an insulated wire; 501. an insulating layer; 502. a conductor; 6. a filler; 7. and (6) wrapping a covering.

Detailed Description

In the description of the present invention, words similar to "front", "rear", "left", "right", etc. indicating directions or positional relationships are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

The utility model provides a technical scheme that: an irradiation crosslinked polyethylene insulated polyolefin sheath long-service-life environment-friendly cable comprises a cable core 1, a stable sheath core 4 and a partial pressure inner core 3, wherein the cable core 1 consists of three insulated wires 5, each insulated wire 5 consists of a conductor 502 and an insulating layer 501 coaxially extruded outside the conductor 502, the partial pressure inner core 3 is arranged in the hollow center of the cable core 1, the stable sheath core 4 is extruded on the outermost layer of the cable core 1, a wrapping layer 7 is wound outside the stable sheath core 4, and an outer sheath 2 is extruded outside the wrapping layer 7; the outer sheath 2 is composed of a mica fireproof layer 201, a waterproof layer 202 and an anti-cracking sheath 203 which are coaxially and sequentially extruded outside the wrapping layer 7.

As shown in fig. 1 and 2, the stable sleeve core 4 comprises three limit curved sleeves corresponding to the positions of the insulated wires 5, a compression-resistant curved strip for connecting the adjacent curved sleeves, and further comprises a bearing strip fixed at the center of the compression-resistant curved strip along the axis, the stable sleeve core 4 and the wrapping layer 7 are provided with filling materials 6 in a gap, the filling materials 6 are alkali-free glass fiber ropes, when the cable encounters external pressure, the pressure is transferred to the partial pressure inner core 3 and the stable sleeve core 4, and the service life of the cable is prolonged.

As shown in fig. 1 and 2, the partial pressure inner core 3 is a hollow isosceles triangular prism structure, and three side ribs of the partial pressure inner core 3 are all fixed with the pressure-bearing strip of the stable sleeve core 4, so that the external pressure can be shared conveniently, and the inner core can be protected.

As shown in fig. 1 and 2, the stable sleeve core 4 is coated on the outer walls of the three insulated wires 5 of the cable core 1 through the limiting curved sleeve, the adjacent surfaces of the three insulated wires 5 are also attached to the outer curved surface of the partial pressure inner core 3, the stable sleeve core 4 and the partial pressure inner core 3 are made of an elastomer material, and the roundness of the cable core is improved.

As shown in fig. 1, the insulating layer 501 is made of radiation cross-linked polyethylene, and the elastomer material has the characteristics of low smoke, no halogen, flame retardance, high toughness, good insulativity, good elasticity and the like, so that the cable is prevented from being damaged in the rolling process, and the compression-resistant buffering effect is achieved.

As shown in fig. 1 and 3, the waterproof layer 202 is made of water-blocking petroleum jelly, and the crack-resistant sheath 203 is made of flame-retardant polyolefin material, so as to increase the waterproof effect of the cable.

As shown in fig. 1 and 3, the wrapping layer 7 is a glass fiber tape, and the glass fiber tape has the characteristics of high temperature resistance, heat preservation, heat insulation, fire prevention, flame retardation, corrosion resistance, aging resistance, weather resistance, high strength and the like, and can play a good protection effect on the inside.

The principle of the utility model is as follows: the outer sheath 2 of the cable consists of a mica fireproof layer 201 with fireproof performance, an ethylene propylene rubber material, a water-blocking petroleum jelly waterproof layer 202 and an anti-cracking sheath 203 made of halogen low-smoke flame-retardant polyolefin material, improves the compression resistance of the cable, increases the wear resistance of the cable, enables the cable to have stronger space charge resistance and higher compression resistance, and can improve the compression resistance of the cable, the insulating layer 501 outside the conductor 502 is made of irradiation cross-linked polyethylene material, the elastomer material has the characteristics of low smoke zero-halogen flame retardance, high toughness, good insulation, good elasticity and the like, overcomes the problem that the insulation and strength of the irradiation cross-linked cable are insufficient in the prior art, ensures that the cable is not damaged in the rolling process, plays a role in compression resistance and buffering, the partial pressure inner core 3 and the stable sleeve core 4 in the cable are mutually fixed, and the partial pressure inner core 3 and the stable sleeve core 4 are arranged at the periphery of the lead, adopt crowded mode of wrapping, can imbed the wire partial pressure inner core 3, stabilize between the cover core 4, it is fixed through the bearing strip between partial pressure inner core 3, the stable cover core 4 to improve the roundness of sinle silk, when meetting external pressure, make pressure shift to partial pressure inner core 3, stabilize on the cover core 4, increase the life of cable.

Claims

1. The long-service-life environment-friendly cable with the irradiation crosslinked polyethylene insulation polyolefin sheath is characterized by comprising a cable core, a stable sheath core and a partial pressure inner core, wherein the cable core consists of three insulation wires, each insulation wire consists of a conductor and an insulation layer coaxially extruded outside the conductor, the partial pressure inner core is arranged in the hollow position in the center of the cable core, the stable sheath core is extruded on the outermost layer of the cable core, a wrapping layer is wrapped outside the stable sheath core, and an outer sheath is extruded outside the wrapping layer; the outer sheath is composed of a mica fireproof layer, a waterproof layer and an anti-cracking sheath which are coaxially and sequentially extruded outside the wrapping layer.

2. The radiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable according to claim 1, wherein the stable sleeve core comprises three limiting curved sleeves corresponding to the positions of the insulated conductors, a pressure-resistant curved strip for connecting the adjacent curved sleeves, and a pressure-bearing strip fixed at the center of the pressure-resistant curved strip along the axis, a filler is arranged in a gap between the stable sleeve core and the wrapping layer, and the filler is an alkali-free glass fiber rope.

3. The radiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable as claimed in claim 1, wherein the partial pressure inner core is in a hollow isosceles triangular prism structure, and three side ribs of the partial pressure inner core are all fixed with the pressure-bearing strip of the stable sheath core.

4. The radiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable as claimed in claim 2, wherein the stabilizing sleeve core is coated on the outer walls of the three insulated wires of the cable core through a limiting curved sleeve, the adjacent surfaces of the three insulated wires are also attached to the outer curved surface of the partial pressure inner core, and the stabilizing sleeve core and the partial pressure inner core are both made of elastomer materials.

5. The radiation crosslinked polyethylene insulated polyolefin sheathed cable of claim 1, wherein the insulation layer is made of radiation crosslinked polyethylene material.

6. The radiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable according to claim 1, wherein the waterproof layer is composed of water-blocking petroleum jelly, and the crack-resistant sheath is made of halogen-free low-smoke flame-retardant polyolefin material.

7. The radiation crosslinked polyethylene insulated polyolefin sheath long-life environment-friendly cable as claimed in claim 1, wherein the wrapping layer is a glass fiber tape.