CN214624567U

CN214624567U - Conductor stranding pre-rolling device for graphene shielded cable

Info

Publication number: CN214624567U
Application number: CN202120592935.9U
Authority: CN
Inventors: 陆正荣; 唐芸; 赵寿春; 蒋成芳; 丁亮
Original assignee: Samson Cable Co ltd
Current assignee: Samson Cable Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-11-05
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses a conductor stranding pre-rolling device for a graphene shielded cable, which comprises eight parts, namely a first distributing board (1), a second distributing board (2), a third distributing board (3), a hollow rotating shaft (4), a preforming rolling wheel (5), a tension threading hole (6), a stranded single line (7) and a pressing circular die (8); the first wire distribution board (1), the second wire distribution board (2) and the third wire distribution board (3) are sequentially arranged on the hollow rotating shaft (4) according to the wiring direction of the conductor (9); the pressing round die (8) is arranged behind the third distributing plate (3) and is coaxial with the hollow rotating shaft (4). The utility model discloses a during the conductor transposition, every circular monofilament is through the tension through wires hole of first separated time board exert tension control after, through the preforming on second separated time board and the third separated time board roll the wheel, roll into the fan-shaped structure at big fillet, get into again after predetermined angle transposition and sticiss circular mould and tightly press into circular conductor structure, such transposition conductor appearance is round, smooth, inseparable, and the gap between the monofilament is little, optimizes conductor high-tension electric field's evenly distributed.

Description

Conductor stranding pre-rolling device for graphene shielded cable

Technical Field

The utility model relates to a conductor transposition pre-rolling device for graphite alkene shielded cable especially provides one kind and can satisfy graphite alkene semi-conductive shielding layer high mobility and extrude the technological requirement, optimizes high voltage electric field evenly distributed's conductor transposition processingequipment, improves conductor transposition rounding, smoothness, inseparable apparent mass, satisfies the more and more high requirement of market to insulation thickness and insulating eccentricity.

Background

Conductor stranding is the most common cable conductor production procedure, and most conductors of low-voltage, medium-voltage, high-voltage and ultrahigh-voltage cables are produced in such a way; conductor stranding is to strand a plurality of round monofilaments around a stranded wire central line as an axis in a layered and orderly manner to form a structure similar to a hemp rope, the appearance of the stranded conductor is not smooth, and a deep groove is formed between every two adjacent monofilaments; although the prior art adopts a round mold to carry out compaction treatment to improve the appearance rounding and smooth quality of the conductor, deeper groin depressions are still left.

The graphene has excellent electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered to be a revolutionary material in the future. The cable semi-conductive material uses the excellent electrical and mechanical properties of graphene, so that the electrical and mechanical properties of the semi-conductive material are greatly improved, the volume resistivity of the product at 20 ℃ is optimized, and the volume resistivity change rate of the product at 20 ℃ and 90 ℃ is greatly reduced; the mechanical property elongation at break reaches more than 650 percent; the effect of homogenizing the electric field by the shielding layer when the cable runs for a long time at the allowable highest temperature is ensured, and partial discharge possibly generated in the running of the cable is reduced; the method has important significance for guaranteeing safe operation of the line and prolonging the service life of the cable.

Although the electrical and mechanical properties are improved by adding the graphene into the semiconductive shielding, the extrusion flowability of the semiconductive shielding material is also improved by adding the graphene; the improvement of the fluidity improves the processing efficiency of extrusion, but the extrusion is directly carried out on the stranded conductor, and the quality problem that the semi-conducting layer is extruded into the gap between conductor monofilaments is increased due to the enhancement of the extrusion pressure and the fluidity; this requires a better tightness between the conductor monofilaments used in the product; the conductor is round, smooth and compact in appearance, gaps between adjacent monofilaments are small, and the processing technological performance requirements of the graphene semi-conductive shield can be effectively met.

Disclosure of Invention

To the problem and the defect, the utility model provides a conductor transposition rolls device in advance for graphite alkene shielded cable, it is supporting with frame transposition equipment, realize that the conductor forms to roll in advance and the transposition sticiss continuous production, production efficiency has not only been improved, the rounding that has still improved the conductor greatly, it is smooth and inseparable apparent performance, the thigh ditch gap of two adjacent monofilament time has been reduced greatly, with the special processing technology performance requirement of adaptation graphite alkene semi-conductive shielding, can improve this conductor insulation thickness and eccentric control simultaneously, the product quality is improved, it is extravagant to reduce the material.

The technical scheme of the utility model is that: a conductor stranding and pre-rolling device for a graphene shielded cable comprises a first wire dividing plate, a second wire dividing plate, a third wire dividing plate, a hollow rotating shaft, a preforming rolling wheel, a tension threading hole, a stranded single wire and a pressing circular die; the first wire distribution plate, the second wire distribution plate and the third wire distribution plate are sequentially arranged on the hollow rotating shaft according to the conductor wiring direction and are fixedly connected with the hollow rotating shaft; and the pressing circular die is arranged behind the third distributing plate and is coaxial with the hollow rotating shaft.

As the utility model discloses preferred, the coaxial evenly distributed of first branch line board and the conductor outer layer transposition single line radical equal tension through wires hole, the aperture ratio transposition single line diameter of tension through wires hole is little 0.02mm to provide the fan-shaped rolling position of rolling of follow-up big fillet and tension control.

Preferably, the second dividing plate is coaxially and uniformly provided with preforming rolling wheels with the number equal to that of the twisted single lines on the outer layer of the conductor; and the rolling wheel supports of all the preforming rolling wheels vertically point to the circle center of the second wire dividing plate, so that the strand single wires are initially rolled from a circle to a large-fillet sector.

Preferably, the third distributing plate is coaxially and uniformly provided with pre-forming rolling wheels with the number equal to that of the twisted single lines on the outer layer of the conductor; and the rolling wheel supports of all the pre-forming rolling wheels vertically point to the circle center of the third distributing plate, so that finish rolling of the twisted single lines from a circle to a large-fillet sector is realized, and further rolling forming is realized.

Preferably, the forming rolling wheel comprises an arc-shaped upper pressing wheel, a fan-shaped lower pressing wheel, a rolling wheel bracket and a threading hole; the arc diameter of the arc-shaped upper pinch roller is equal to the outer diameter of the conductor; the above-mentioned

The center of the cavity formed by the arc-shaped upper pressing wheel and the fan-shaped lower pressing wheel is positioned at the center of the threading hole, so that the twisted single wires are ensured to enter the rolling position of the preforming rolling wheel.

As the utility model discloses preferred, the tensile threading hole of first branch board, the preforming of second branch board rolls the wheel, and the preforming of third branch board rolls the wheel quantity and equals, and in same straight line position; the distance between the arc-shaped upper pressing wheel and the fan-shaped lower pressing wheel of the third parting plate preforming rolling wheel is less than 0.2 mm; the gradual rolling forming process of the twisted single wire from a circle to a large-fillet sector is realized.

As the utility model discloses preferred, the distance of the round mould that sticiss with the third separated time board is 0.5 ~ 0.8 times conductor outermost layer transposition pitch in the central right position of third separated time board; the twisted single lines are rolled into a large-fillet fan-shaped structure through a preforming rolling wheel, the twisted single lines are pre-twisted by rotation and enter a compact circular die, the fan angle formed by rolling the twisted single lines faces to the axis position of the conductor, and finally the twisted single lines on the outer layer of the conductor are spliced into a tight round shape; after entering a compact round die, the conductor is further compacted and rounded, and the minimum of the strand gap between the adjacent monofilaments on the outer layer of the conductor is ensured.

Compared with the prior art, the utility model discloses an innovation effect is:

in the conductor twisting process, twisted single wires are rolled into a large fillet fan-shaped structure through 2 pre-forming rolling wheels, and then are pressed into a round shape through a pressing round die, so that the conductor is more round, smooth and compact, and a groove gap between two adjacent single wires on the outermost layer of the conductor is very small, so that the apparent quality of the conductor is improved, and the requirements of a graphene semi-conductive high-fluidity production process are well met, the distribution of a high-voltage electric field on the surface of the conductor of the cable is optimized, and the operation electrical safety performance of the cable is improved; meanwhile, the eccentric control of internal and external shielding and insulation production is improved, and the material consumption is saved.

The conductor stranding adopts a synchronous process device which rolls and molds at the same time, and compared with the prior art which rolls and molds firstly and then twists, the production efficiency is higher, and the process consumption is less; compared with the prior art that the round monofilament is directly twisted and compacted, the twisted and compacted monofilament has small drawing plastic deformation after being rolled, so that the low-resistivity performance can be better kept, and the consumption of copper can be saved on the premise of realizing the same resistance.

Drawings

In order that the present invention may be more clearly understood, the following detailed description of the present invention is provided in terms of specific examples taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a left side view of the structure of the present invention, and fig. 3 is a partial enlarged view of the structure of the present invention.

The reference numbers in the drawings are as follows: the wire drawing machine comprises a first wire distributing plate (1), a second wire distributing plate (2), a third wire distributing plate (3), a hollow rotating shaft (4), a preforming rolling wheel (5), an arc-shaped upper pressing wheel (51), a fan-shaped lower pressing wheel (52), a rolling wheel support (53), a threading hole (54), a tension threading hole (6), a stranded single wire (7), a pressing circular die (8) and a conductor (9).

Detailed Description

Referring to fig. 1 and 2, the conductor stranding pre-rolling device for the graphene shielded cable comprises eight parts, namely a first distributing plate (1), a second distributing plate (2), a third distributing plate (3), a hollow rotating shaft (4), a preforming rolling wheel (5), a tension threading hole (6), stranded single wires (7) and a pressing circular die (8); wherein the first wire distribution board (1), the second wire distribution board (2) and the third wire distribution board (3) are sequentially arranged on the hollow rotating shaft (4) according to the wiring direction of the conductor (9); the pressing round die (8) is arranged behind the third distributing plate (3) and is coaxial with the hollow rotating shaft (4).

Tension threading holes (6) with the same number as the number of the stranded single wires (7) on the outermost layer of the conductor (9) are coaxially and uniformly distributed on the first wire dividing plate (1), and the inner diameter of each tension threading hole (6) is smaller than the outer diameter of each stranded single wire (7) by 0.02 mm.

The second wire distribution plate (2) is coaxially and uniformly provided with pre-forming rolling wheels (5) with the same number as the number of the stranded single wires (7) on the outermost layer of the conductor (9).

The third wire distributing plate (3) is coaxially and uniformly provided with pre-forming rolling wheels (5) with the same number as the number of the stranded single wires (7) on the outermost layer of the conductor (9).

Referring to fig. 3, the forming rolling wheel (5) is composed of an arc-shaped upper pressing wheel (51), a fan-shaped lower pressing wheel (52), a rolling wheel bracket (53) and a threading hole (54); the arc diameter of the arc-shaped upper pressing wheel (51) is equal to the outer diameter of the conductor (9); the arc-shaped upper pressing wheel (51) and the fan-shaped lower pressing wheel (52) are respectively and uniformly distributed and fixed on the second distributing plate (2) and the third distributing plate (3) through rolling wheel brackets (53).

The fan-shaped angle of the fan-shaped lower pinch roller (52) is 360 degrees divided by the number of the stranded single wires (7) on the outermost layer of the conductor (9).

The center of the cavity formed by the arc-shaped upper pressing wheel (51) and the fan-shaped lower pressing wheel (52) is positioned at the center of the threading hole (54).

The tension threading hole (6) of the first wire dividing plate (1), the preforming rolling wheel (5) of the second wire dividing plate (2) and the preforming rolling wheel (5) of the third wire dividing plate (3) are on the same straight line, and the distance between the arc-shaped upper pressing wheel (51) of the preforming rolling wheel (5) of the third wire dividing plate (3) and the fan-shaped lower pressing wheel (52) is smaller than the distance between the arc-shaped upper pressing wheel (51) of the preforming rolling wheel (5) of the second wire dividing plate (2) and the fan-shaped lower pressing wheel (52) by 0.2 mm.

The pressing circular die (8) is arranged at the right side of the center of the third distributing board (3), and the distance between the pressing circular die and the third distributing board (3) is 0.5-0.8 times of the outermost layer pitch of the conductor (9); the twisted single lines (7) are rolled into a large-circular-angle fan-shaped structure through the preforming rolling wheel (5), the twisted single lines rotate for pretwisting for a circle and enter a pressing circular die (8), the fan angle formed by rolling the twisted single lines (7) faces to the axis position of the conductor (9), and finally the twisted single lines (7) on the outer layer of the conductor (9) are spliced into a dense circle; after entering the compacting circular die (8), the conductor is further compacted and rounded to ensure that the gap between adjacent monofilaments on the outer layer of the conductor (9) is minimized.

The working principle is as follows: as shown in fig. 1, 2 and 3, a conductor twisting and pre-rolling device for a graphene shielded cable is installed on a central shaft of the last twisting cage of a frame twisting device, and the central shaft of the twisting cage is coaxially connected with a hollow rotating shaft (4); the conductor stranding pre-rolling device for the graphene shielded cable and a stranding cage of a frame stranding after fixed connection and a stranding single wire (7) pay-off reel synchronously rotate; after the twisted single wires (7) are paid out from the wire coil of the frame twist, the tension is increased and the positioning is carried out through the tension threading holes (6) of the first wire distributing plate (1), and the twisted single wires enter the preforming rolling wheel (5) of the second wire distributing plate (2) to carry out the primary rolling forming; then the steel wire enters a preforming rolling wheel (5) of a third wire distributing plate (3) to be rolled for the second time to form a large-fillet fan-shaped structure; the twisted single wire (7) is rolled twice by an arc-shaped upper pressing wheel (51) and a fan-shaped lower pressing wheel (52) of a pre-forming rolling wheel (5); the twisted single wire (7) is pre-twisted for a circle after coming out of a pre-forming rolling wheel (5) of the third distributing plate (3) and enters a compact circular die (8); all the twisted single wires (7) on the outer layer of the conductor (9) are rolled through the process and then enter a pressing round die (8) for further pressing and forming, and finally the purpose of improving the appearance roundness, compactness and smoothness of the conductor (9) is achieved, so that the requirements of the graphene semi-conductive high-fluidity production process are met, the high-voltage electric field distribution on the surface of the conductor of the cable is optimized, and the running electrical safety performance of the cable is improved; meanwhile, the eccentric control of internal and external shielding and insulation production is improved, and the material consumption is saved;

the above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it is understood that the above description is only an embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a conductor transposition pre-rolling device for graphite alkene shielded cable which characterized in that: the device comprises eight parts, namely a first wire distribution plate (1), a second wire distribution plate (2), a third wire distribution plate (3), a hollow rotating shaft (4), a preforming rolling wheel (5), a tension threading hole (6), a twisted single wire (7) and a pressing circular die (8); the first wire distribution board (1), the second wire distribution board (2) and the third wire distribution board (3) are sequentially arranged on the hollow rotating shaft (4) according to the wiring direction of the conductor (9); the pressing round die (8) is arranged behind the third distributing plate (3) and is coaxial with the hollow rotating shaft (4).

2. The conductor stranding and pre-rolling device for the graphene shielded cable according to claim 1, characterized in that: the tension threading holes (6) with the same number as the outermost stranded single wires (7) of the conductor (9) are coaxially and uniformly distributed on the first wire dividing plate (1), and the inner diameter of each tension threading hole (6) is smaller than the outer diameter of each stranded single wire (7) by 0.02 mm.

3. The conductor stranding and pre-rolling device for the graphene shielded cable according to claim 1, characterized in that: the second wire distribution plate (2) is coaxially and uniformly provided with pre-forming rolling wheels (5) with the same number as the number of the stranded single wires (7) on the outermost layer of the conductor (9); and the third distributing plate (3) is coaxially and uniformly provided with pre-forming rolling wheels (5) with the same number as the number of the stranded single wires (7) on the outermost layer of the conductor (9).

4. The conductor stranding and pre-rolling device for the graphene shielded cable according to claim 1, characterized in that: the pre-forming rolling wheel (5) consists of an arc-shaped upper pressing wheel (51), a fan-shaped lower pressing wheel (52), a rolling wheel bracket (53) and a threading hole (54); the arc diameter of the arc-shaped upper pressing wheel (51) is equal to the outer diameter of the conductor (9); the fan-shaped angle degree of the fan-shaped lower pressing wheel (52) is 360 degrees divided by the number of stranded single wires (7) on the outermost layer of the conductor (9); the center of the cavity formed by the arc-shaped upper pressing wheel (51) and the fan-shaped lower pressing wheel (52) is positioned at the center of the threading hole (54).

5. The conductor stranding and pre-rolling device for the graphene shielded cable according to claim 1, characterized in that: the tension threading hole (6) of the first wire dividing plate (1), the preforming rolling wheel (5) of the second wire dividing plate (2) and the preforming rolling wheel (5) of the third wire dividing plate (3) are on the same straight line, and the distance between the arc upper pressing wheel (51) of the preforming rolling wheel (5) of the third wire dividing plate (3) and the fan-shaped lower pressing wheel (52) is smaller than the distance between the arc upper pressing wheel (51) of the preforming rolling wheel (5) of the second wire dividing plate (2) and the fan-shaped lower pressing wheel (52) by 0.2 mm.