CN106782808B - Unbalanced current-carrying capacity low-voltage power hybrid cable and manufacturing method thereof - Google Patents

Abstract

The invention provides a low-voltage power hybrid cable with unbalanced current-carrying capacity, which comprises a conductor, an insulating sleeve, a wrapping belt and a sheath, wherein the insulating sleeve wraps the outside of the conductor, the conductor and the insulating sleeve wrapping the outside of the conductor are arranged in the wrapping belt, a non-hygroscopic filling rope is also arranged in the wrapping belt, and the sheath wraps the outside of the wrapping belt. On the premise of ensuring the quality of cable products, the cost of the cable is reduced, and the cost of the cross-linking material is twice that of the polyvinyl chloride material, so that the cost of the cable is reduced in terms of materials.

Description

Unbalanced current-carrying capacity low-voltage power hybrid cable and manufacturing method thereof

Technical Field

The invention relates to a low-voltage power hybrid cable with unbalanced current-carrying capacity and a manufacturing method thereof, belonging to the field of manufacturing and processing.

Background

The manufacture of wire and cable is quite different from the way most electromechanical products are produced. Electromechanical products typically employ the assembly of parts into components, and the reassembly of multiple parts into a single product, with the product being metered in units or pieces. The wire and cable are in basic unit of measurement of length. All the electric wires and cables are made by processing conductors, and adding insulation, shielding, cabling, sheath and the like layer by layer on the periphery of the conductors to form electric wire and cable products. The more complex the product structure, the more levels are superimposed.

The market for cables on the market is now competitive and there is a need for a cable that can reduce costs.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a low-voltage power hybrid cable with unbalanced current-carrying capacity and a manufacturing method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a mixed cable of unbalanced current-carrying capacity low pressure power, includes conductor, insulating cover, band and sheath, the outside parcel of conductor has the insulating cover of one deck, conductor and parcel all set up in the band the inside at the outside insulating cover of conductor, the inside of band still is provided with non-hygroscopicity filling rope, the outer parcel of band has the one deck sheath.

The four conductors are formed by twisting three large conductors and one small conductor, the cross section of each large conductor is circular, the large conductors are formed by twisting second type TR soft conductors, the twisting structure is (1+6)/1.7mm, the cross section area of each large conductor is 16mm2, the cross section of each small conductor is circular, the small conductors are formed by twisting second type TR soft conductors, the twisting structure is (1+6)/1.35mm, and the cross section area of each small conductor is 10mm 2.

Furthermore, the three large conductors are wrapped by a layer of insulating sleeve, and the insulating sleeve is made of cross-linked polyethylene.

Furthermore, the small-sized conductor is wrapped by an insulating sleeve, and the insulating sleeve is made of polyvinyl chloride.

A manufacturing method of a low-voltage power hybrid cable according to unbalanced current-carrying capacity comprises the following steps:

step S1, drawing wire, namely drawing a copper rod with the diameter of 8 mm into a copper wire with the diameter of 3 mm through a 13-die large drawing machine by virtue of 13 dies, drawing the copper wire with the diameter of 3 mm into a copper wire with the diameter of 1.7mm through a 7-die drawing machine by virtue of a 17-die middle drawing machine, and drawing the copper wire with the diameter of 3 mm into a copper wire with the diameter of 1.35mm through a 10-die drawing machine by virtue of a 17-die middle drawing machine;

step S2, twisting conductors, namely selecting a twisting machine suitable for twisting cable cores with the sections of 10, 16, 25 and 35, wherein the twisting machine is provided with 7 pay-off devices, each pay-off device is provided with a cable pay-off disc, and the 7 single wires are twisted left according to a certain pitch to form the conductors;

step S3, insulation, namely extruding and insulating the conductor twisted by the tube twisting machine in the previous process on a 90-degree extruder, namely heating granular plastic into viscous state by processing the used raw material through the extruder, obtaining deformation under the action of the pressure of a machine barrel and a machine head, and forming a ring shape by a die of the machine head to be attached to the periphery of the conductor to form an insulation sleeve;

step S4, cabling, using cabling equipment to twist the conductor and the insulating sleeve attached on the surface of the conductor according to a certain pitch and clockwise, arranging a wrapping machine at the front section of the cabling equipment, and overlapping the CPP strip on the conductor in a tangent mode;

and step S5, sheathing, namely sheathing the conductor wrapped by the belt by using a 90-degree extruder, namely extruding the conductor wrapped by the belt by using the 90-degree extruder, wherein in the extrusion process, plastic particles loaded into a hopper enter a machine barrel by virtue of gravity screw, are continuously pushed forward under the thrust action of a rotating screw, meanwhile, the plastic is stirred and extruded by the screw, and is converted into a viscous state under the action of external heat of the machine barrel and shearing friction heat between the plastic and equipment, so that a uniform and continuous material flow is formed in a screw groove. The material flow reaching the machine head passes through the annular gap between the mold core and the mold sleeve and is extruded around the wire core to form a continuous and compact sheath, thereby completing the manufacture of the mixed cable.

Further, in step S2, a belt tension device is provided on each cable drum to ensure uniform tension of each strand.

Further, in step S3, the insulation material of the 16mm2 stranded conductor uses a cross-linked polyethylene insulation material with a thickness of 0.7 mm; polyvinyl chloride insulation was used as the insulation of the 10mm2 stranded conductor, and the thickness was 1.0 mm.

Further, in step S4, a non-hygroscopic filler rope is filled between the conductor and the conductor gap during twisting, and then a tape is wrapped, the non-hygroscopic filler rope ensuring the cable core to be round.

The invention has the beneficial effects that: according to the low-voltage power hybrid cable with unbalanced carrying capacity and the manufacturing method thereof, the cost of the cable is reduced on the premise of ensuring the quality of the cable product, and the cost of the cross-linking material is twice that of the polyvinyl chloride material, so that the cost of the cable is reduced in terms of materials.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a low-voltage power hybrid cable with unbalanced current carrying capacity according to the present invention;

FIG. 2 is a schematic illustration of a method of making a low-pressure power hybrid cable with unbalanced current carrying capacity according to the present invention;

in the figure: 1-conductor, 2-insulating sleeve, 3-wrapping tape and 4-sheath.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides an unbalanced current-carrying capacity low pressure power hybrid cable, includes conductor 1, insulating cover 2, band 3 and sheath 4, and 1 outside parcel of conductor has the insulating cover of one deck 2, and conductor 1 and parcel all set up in band 3 the inside at 1 outside insulating cover 2 of conductor, and the inside of band 3 still is provided with non-hygroscopicity packing rope, and the outer parcel of band 3 has the one deck sheath.

The four conductors 1 are four, the four conductors 1 are composed of three large conductors and one small conductor, the cross section of each large conductor is circular, the large conductors are formed by twisting second type TR soft through conductors, the twisting structure is (1+6)/1.7mm, the cross section area of each large conductor is 16mm2, the cross section of each small conductor is circular, the small conductors are formed by twisting second type TR soft through conductors, the twisting structure is (1+6)/1.35mm, and the cross section area of each small conductor is 10mm 2.

The outside of three large-scale conductors all wraps up has one deck insulating cover 2, and insulating cover 2 material uses the crosslinked polyethylene material, and the outside parcel of small-size conductor has one deck insulating cover 2, and insulating cover 2 material uses the polyvinyl chloride material.

Referring to fig. 2, the present invention provides a technical solution: a manufacturing method of a low-voltage power hybrid cable according to unbalanced current-carrying capacity comprises the following steps:

step S1, drawing wire, namely drawing a copper rod with the diameter of 8 mm into a copper wire with the diameter of 3 mm through a 13-die large drawing machine by virtue of 13 dies, drawing the copper wire with the diameter of 3 mm into a copper wire with the diameter of 1.7mm through a 7-die drawing machine by virtue of a 17-die middle drawing machine, and drawing the copper wire with the diameter of 3 mm into a copper wire with the diameter of 1.35mm through a 10-die drawing machine by virtue of a 17-die middle drawing machine;

step S2, twisting conductors, namely selecting a twisting machine suitable for twisting cable cores with the sections of 10, 16, 25 and 35, wherein the twisting machine is provided with 7 pay-off devices, each pay-off device is provided with a cable pay-off disc, and the 7 single wires are twisted left according to a certain pitch to form the conductors;

step S3, insulation, namely extruding and insulating the conductor twisted by the tube twisting machine in the previous process on a 90-degree extruder, namely heating granular plastic into viscous state by processing the used raw material through the extruder, obtaining deformation under the action of the pressure of a machine barrel and a machine head, and forming a ring shape by a die of the machine head to be attached to the periphery of the conductor to form an insulation sleeve;

step S4, cabling, using cabling equipment to twist the conductor and the insulating sleeve attached on the surface of the conductor according to a certain pitch and clockwise, arranging a wrapping machine at the front section of the cabling equipment, and overlapping the CPP strip on the conductor in a tangent mode;

and step S5, sheathing, namely sheathing the conductor wrapped by the belt by using a 90-degree extruder, namely extruding the conductor wrapped by the belt by using the 90-degree extruder, wherein in the extrusion process, plastic particles loaded into a hopper enter a machine barrel by virtue of gravity screw, are continuously pushed forward under the thrust action of a rotating screw, meanwhile, the plastic is stirred and extruded by the screw, and is converted into a viscous state under the action of external heat of the machine barrel and shearing friction heat between the plastic and equipment, so that a uniform and continuous material flow is formed in a screw groove. The material flow reaching the machine head passes through the annular gap between the mold core and the mold sleeve and is extruded around the wire core to form a continuous and compact sheath, thereby completing the manufacture of the mixed cable.

At step S2, a belt tension device is provided on each cable payout reel to ensure that the tension of each individual wire is substantially uniform.

In step S3, the insulation material of the 16mm2 stranded conductor uses a cross-linked polyethylene insulation material with a thickness of 0.7 mm; 10mm²The insulating material of the stranded conductor is polyvinyl chloride insulating material with the thickness of 1.0 mm.

In step S4, a non-hygroscopic filler rope for ensuring the cable core to be round is filled between the conductor and the conductor gap during twisting, and then the tape is wrapped.

As an embodiment of the present invention: on the premise of ensuring the quality of cable products, the cost of the cable is reduced, and the cost of the cross-linking material is twice that of the polyvinyl chloride material, so that the cost of the cable is reduced in terms of materials.

Meanwhile, the products do not appear in the market, and the low-voltage power cable is applied to various industries. At present, the cable industry is competitive and requires low price bidding. The product reduces the cost of the cable under the condition of not influencing the use characteristics of the cable, and has wide space in the cable market. The cable is only for 4+1 type, 3+2 type and 3+1 type core crosslinked polyethylene insulation low-voltage power cables, and cable cores of auxiliary sections in 4 and 5 cores are used for a ground wire and a zero line in the cable, so that the requirement on current-carrying capacity is not high in the cable design, and therefore polyvinyl chloride insulation is adopted in the design of auxiliary core insulation without adopting crosslinked polyethylene insulation materials, and the cost of the cable is reduced.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (1)

1. The utility model provides an unbalanced current-carrying capacity low pressure power hybrid cable, includes conductor, insulating cover, band and sheath, its characterized in that: the conductor and the insulating sleeve wrapped outside the conductor are arranged inside the wrapping belt, a non-hygroscopic filling rope is further arranged inside the wrapping belt, and a sheath is wrapped on the outer layer of the wrapping belt;

the four conductors are composed of three large conductors and one small conductor, the cross section of each large conductor is circular, the large conductors are formed by twisting second type TR soft through conductors, the twisting structure is (1+6)/1.7mm, and the cross section area of each large conductor is 16mm²The cross section of the small conductor is circular, the small conductor is formed by twisting a second type TR soft through conductor, the twisting structure is (1+6)/1.35mm, and the cross section area of the small conductor is 10mm²；

The outer parts of the three large conductors are respectively wrapped with a layer of insulating sleeve, and the insulating sleeve is made of cross-linked polyethylene material;

the small conductor is wrapped with an insulating sleeve, and the insulating sleeve is made of polyvinyl chloride material;

the manufacturing method of the unbalanced current-carrying capacity low-voltage power hybrid cable comprises the following steps:

step S1, drawing wire, namely drawing a copper rod with the diameter of 8 mm into a copper wire with the diameter of 3 mm through a 13-die large drawing machine by virtue of 13 dies, drawing the copper wire with the diameter of 3 mm into a copper wire with the diameter of 1.7mm through a 7-die drawing machine by virtue of a 17-die middle drawing machine, and drawing the copper wire with the diameter of 3 mm into a copper wire with the diameter of 1.35mm through a 10-die drawing machine by virtue of a 17-die middle drawing machine;

step S2, twisting conductors, namely selecting a twisting machine suitable for twisting cable cores with the sections of 10, 16, 25 and 35, wherein the twisting machine is provided with 7 pay-off devices, each pay-off device is provided with a cable pay-off disc, and the 7 single wires are twisted left according to a certain pitch to form the conductors;

step S3, insulation, namely extruding and insulating the conductor twisted by the tube twisting machine in the previous process on a 90-degree extruder, namely heating granular plastic into viscous state by processing the used raw material through the extruder, obtaining deformation under the action of the pressure of a machine barrel and a machine head, and forming a ring shape by a die of the machine head to be attached to the periphery of the conductor to form an insulation sleeve;

step S4, cabling, using cabling equipment to twist the conductor and the insulating sleeve attached on the surface of the conductor according to a certain pitch and clockwise, arranging a wrapping machine at the front section of the cabling equipment, and overlapping the CPP strip on the conductor in a tangent mode;

step S5, sheathing, namely sheathing the conductor after the belt is wrapped by using a 90-degree extruder, namely extruding the conductor after the belt by using the 90-degree extruder, wherein in the extrusion process, plastic particles loaded into a hopper enter a machine barrel by means of gravity screw, are continuously pushed forward under the thrust action of a rotating screw, meanwhile, the plastic is stirred and extruded by the screw, and are converted into a viscous flow state under the action of external heat of the machine barrel and shearing friction heat between the plastic and equipment, uniform and continuous material flow is formed in a screw groove, the material flow reaching a machine head passes through an annular gap between a mold core and the mold sleeve and is extruded around the wire core to form a continuous and compact sheath, and thus the manufacturing of the mixed cable is completed;

in step S2, each cable pay-off reel has a belt tension device to ensure the tension of each single wire is consistent;

in step S3, 16mm²Insulating material of stranded conductor using cross-linked polyethylene insulating materialThe thickness of the material is 0.7 mm; the insulation material of the 10mm2 stranded conductor is polyvinyl chloride insulation material, and the thickness is 1.0 mm;

in step S4, a non-hygroscopic filler rope for ensuring the cable core to be round is filled between the conductor and the conductor gap during twisting, and then the tape is wrapped.

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