CN210692124U

CN210692124U - Transposition equipment of polyethylene high flame retardant power cable

Info

Publication number: CN210692124U
Application number: CN201921707871.1U
Authority: CN
Inventors: 尚永久; 袁巍; 张海峰
Original assignee: Hubei Lisheng Cable Co ltd
Current assignee: Hubei Lisheng Cable Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-05
Anticipated expiration: 2029-10-12

Abstract

The utility model discloses a stranding device of a polyethylene high flame-retardant power cable, which comprises a fixed seat, a fixed disk, an auxiliary fixed part and a guide part; the fixed disc is mounted at the upper end of the fixed seat, a through hole which is convenient for a plurality of wires to pass through is formed in the middle of the fixed disc, a rotating ring is rotatably arranged on the inner wall of the through hole through a rotating bearing and is connected with the fixed ring through a positioning rod, the fixed ring is far away from the plane where the fixed disc is located, a plurality of guide beads are distributed on the fixed ring in an array mode, the guide beads are rotatably arranged on the fixed ring through the fixed bearing, when the wires pass through the through hole, the guide columns can play a role in guiding the wires, sliding friction between the wires and; many insulation core must be in the same place through transposition equipment transposition, and this application designs to current demand, has designed a high temperature resistant, low cigarette, no halogen, fire-retardant, fire resisting cable, and has simplified the processing technology of this kind of high-quality cable, has reduced the processing cost, and the practicality is strong.

Description

Transposition equipment of polyethylene high flame retardant power cable

Technical Field

The utility model relates to the technical field of cables, specifically a high fire-retardant power cable of polyethylene and equipment.

Background

With the economic development of China and the frequent occurrence of electrical fires, from the end of the 70 s, China develops and researches the flame retardant technology of wires and cables. In the early 80 s, many domestic large-scale cable enterprises have produced ordinary polyvinyl chloride insulating flame-retardant cables at first, although the existence of halogen in polyvinyl chloride materials inhibits the combustion of organic materials, the decomposed product hydrogen chloride in the polyvinyl chloride continuously reacts with active hydroxyl HO, so that the combustion is blocked to generate a large amount of smoke and toxic gas, the more flame retardants are, the larger the smoke generation amount during combustion is, the larger the generated smoke toxicity is, once a fire disaster occurs, the visual range of people in the escape process is rapidly reduced, and the toxic smoke can cause escape personnel to die by suffocation. Currently, with the improvement of product safety and reliability in China, many cable users put forward new requirements on the flame retardant performance of cable products, and particularly in the field of high-rise buildings and densely populated public places, the cable has definite requirements on the flame retardant grade, namely the cable is required to have the requirements of high temperature resistance, low smoke, zero halogen, flame retardance, fire resistance and the like, and the environment-friendly natural crosslinked polyethylene high-flame-retardant power cable meets the requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high fire-retardant power cable of polyethylene and equipment to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a polyethylene high flame-retardant power cable comprises an electric core layer and fixing cloth arranged on the outer side of the electric core layer, wherein the electric core layer is formed by stranding at least more than two insulating wire cores;

the insulated wire core consists of an insulating layer, a fire-resistant layer and a conductor from outside to inside, the conductor consists of a plurality of annealed round copper wires, the annealed soft round copper wires are twisted together in a regular twisting mode, and the fire-resistant layer is arranged outside the conductor;

the fire-resistant layer material is preferably a synthetic mica tape;

an insulating layer is arranged outside the round conductor, and the insulating layer is uniformly and tightly covered on the fire-resistant layer in a circular shape;

a plurality of insulating wire cores are stranded together through stranding equipment, filling layers are arranged among the insulating wire cores and in the hollow parts of the insulating wire cores and the fixing cloth, and the filling layers are alkali-free flame-retardant rock wool ropes;

an inner cushion layer is arranged outside the fixed cloth, the inner cushion layer is arranged outside the fixed cloth in an extruding or wrapping mode, and the inner cushion layer is made of a low-smoke halogen-free flame-retardant B-grade sheath material;

a steel belt is arranged outside the inner cushion layer, the steel belt is of a double-layer gap wrapping structure, and an outer layer strip of the steel belt is in the middle of an inner layer strip of the steel belt in a wrapping gap;

an outer sheath is arranged outside the steel belt and arranged outside the steel belt in an extrusion mode.

As a further aspect of the present invention: the mica tape adopts a double-layer overlapping wrapping process, and the overlapping rate of each single layer is not less than 15-20%.

As a further aspect of the present invention: five insulated wire cores are provided.

As a further aspect of the present invention: the fixed cloth is a double-sided alkali-free coated adhesive tape.

As a further aspect of the present invention: and the joint of the strip of the steel strip is provided with an anti-rust layer.

As a further aspect of the present invention: the outer sheath material is low-smoke halogen-free flame-retardant B-grade sheath material.

A manufacturing method of a polyethylene high-flame-retardant power cable comprises the following steps:

step 1: twisting at least one annealed soft round copper wire together in a regular twisting mode to construct a conductor, arranging a fire-resistant layer outside the conductor by adopting a double-layer overlapping wrapping process, wherein the overlapping rate of each single layer is not less than 15-20%, uniformly and tightly covering an insulating layer outside the fire-resistant layer in a circular ring shape, and finally constructing an insulating wire core;

step 2: taking at least two insulation wire cores obtained in the step, and twisting the insulation wire cores together through twisting equipment to form a core layer;

and step 3: the outside of the battery core layer is wrapped with fixing cloth, and alkali-free flame-retardant rock wool ropes are arranged among the plurality of insulating wire cores and in the hollow parts of the insulating wire cores and the fixing cloth;

and 4, step 4: an inner cushion layer is arranged on the fixed cloth through extrusion or wrapping, and the inner cushion layer is made of a low-smoke halogen-free flame-retardant B-grade sheath material;

and 5: the steel belt is arranged outside the inner cushion layer, the outer sheath is arranged outside the steel belt in an extrusion wrapping mode, and the outer sheath material is low-smoke halogen-free flame-retardant B-level sheath material.

A twisting device comprises a fixed seat, a fixed disk, an auxiliary fixed component and a guide component;

the guide device is characterized in that a fixed disc is mounted at the upper end of the fixed seat, a through hole which is convenient for a plurality of wires to pass through is formed in the middle of the fixed disc, a rotating ring is rotatably arranged on the inner wall of the through hole through a rotating bearing, the rotating ring is connected with a fixed ring through a positioning rod, the fixed ring is far away from the plane where the fixed disc is located, a plurality of guide beads are distributed on the fixed ring in an array mode, the guide beads are rotatably arranged on the fixed ring through the fixed bearing, when the wires pass through the through hole, the guide columns can play a guide role on the wires, the wires are;

the wire guide device is characterized in that at least two auxiliary fixing parts are distributed on the outer side of the fixed disc in an array manner and used for guiding and fixing a single wire, each auxiliary fixing part comprises two symmetrically-arranged clamping fixing rods, the inner ends of the clamping fixing rods are rotatably arranged on the fixed disc, one side, opposite to each clamping fixing rod, of each clamping fixing rod is provided with a reset rod, each reset rod is connected with the fixed disc through a reset spring, side rods perpendicular to the different surfaces of the reset rods are symmetrically arranged on two sides of each clamping fixing rod close to each reset rod, first guide balls are rotatably arranged on the side rods, stress rods parallel to the reset rods are arranged on the surfaces of the clamping fixing rods, third guide balls are rotatably arranged on the stress rods, limiting rods parallel to the stress rods and used for limiting the wires are arranged at the ends of the clamping fixing rods, and second guide balls are rotatably arranged; two atress poles, two release links all stagger the setting.

Compared with the prior art, the beneficial effects of the utility model are that: this application designs to current demand, has designed a high temperature resistant, low cigarette, no halogen, fire-retardant, fire resisting cable, and has simplified the processing technology of this kind of high-quality cable, has reduced the processing cost, and the practicality is strong.

Drawings

Fig. 1 is a schematic structural diagram of the cable of the present invention.

Fig. 2 is a schematic structural view of the middle twisting device of the present invention.

Fig. 3 is a partial enlarged view of the structure of the middle twisting device of the present invention.

Wherein: the steel wire comprises an outer sheath 1, a steel belt 2, an inner cushion layer 3, fixing cloth 4, an insulating wire core 5, an insulating layer 53, a fire-resistant layer 52, a conductor 51 and a filling layer 6;

a fixing base 100, a fixing plate 200, an auxiliary fixing member 300, and a guide member 400;

the auxiliary fixing member 300 includes a first guide ball 301, a grip fixing rod 302, a second guide ball 303, a third guide ball 304, a return lever 305, a return spring 306;

positioning rod 401, fixed ring 402, rotating ring 403, and guide ball 404.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, in an embodiment of the present invention, a polyethylene high flame retardant power cable includes a core layer and a fixing cloth 4 disposed outside the core layer, the fixing cloth 4 is a double-sided non-alkali coated adhesive tape, the core layer is formed by twisting at least two or more insulated wire cores 5, and the number of the insulated wire cores 5 is preferably five;

the insulated wire core 5 consists of an insulating layer 53, a fire-resistant layer 52 and a conductor 51 from outside to inside, the conductor 51 consists of a plurality of annealed round copper wires, the annealed round copper wires are twisted together in a regular twisting mode, and the direct current resistance of the conductor at 5120 ℃ meets the relevant regulation of GB/T3956-2008; a fire-resistant layer 52 is arranged outside the conductor 51;

the fire-resistant layer 52 is preferably made of synthetic mica tape, the temperature resistance of the fire-resistant layer can reach 950 ℃, the mica tape adopts a double-layer overlapping wrapping process, and the overlapping rate of each single layer is not less than 15-20%;

an insulating layer 53 is arranged outside the round conductor 51, the insulating layer 53 is uniformly and tightly covered on the fire-resistant layer 52 in a circular ring shape, and the thickness of the insulating layer 53 refers to the requirement of GB/T12706-2008 on the thickness;

a plurality of insulating wire cores 5 need to be twisted together through twisting equipment, filling layers 6 are arranged among the insulating wire cores 5 and in the hollow parts of the insulating wire cores 5 and the fixing cloth 4, and the filling layers 6 are alkali-free flame-retardant rock wool ropes;

an inner cushion layer 3 is arranged outside the fixed cloth 4, the inner cushion layer 3 is arranged outside the fixed cloth 4 in an extruding or wrapping mode, the thickness requirement of the inner cushion layer refers to the requirement of GB/T12706-2008 on the thickness, and the material of the inner cushion layer preferably adopts a low-smoke halogen-free flame-retardant B-grade sheath material;

the steel belt 2 is arranged outside the inner cushion layer 3, the steel belt 2 adopts a double-layer gap wrapping structure, the outer layer strip of the steel belt 2 is just positioned in the middle of the inner layer strip, if the strip of the steel belt 2 is provided with a joint, rust prevention treatment needs to be carried out, and if the steel belt 2 is a single-core cable, the steel belt 2 is made of a non-magnetic material;

the outer sheath 1 is arranged outside the steel strip 2, the outer sheath 1 is arranged outside the steel strip 2 in an extrusion wrapping mode, the thickness requirement of the outer sheath refers to the requirement of GB/T12706-2008 on the thickness, the steel strip and the outer sheath are required not to be adhered when being peeled off, and the outer sheath 1 is made of a low-smoke halogen-free flame-retardant B-level sheath material.

The manufacturing method of the polyethylene high-flame-retardant power cable comprises the following steps:

step 1: twisting at least one annealed soft round copper wire together in a regular twisting mode to construct a conductor, arranging a fire-resistant layer 52 outside the conductor 51 by adopting a double-layer overlapping wrapping process, wherein the overlapping rate of each single layer is not less than 15-20%, uniformly and tightly covering an insulating layer 53 outside the fire-resistant layer 52 in a circular ring shape, and finally constructing an insulating wire core;

step 2: taking at least two insulation wire cores obtained in the step 1, and twisting the insulation wire cores together through twisting equipment to form a core layer;

and step 3: the outside of the battery core layer is wrapped with a fixed cloth 4, and alkali-free flame-retardant rock wool ropes are arranged among the plurality of insulating wire cores 5 and in the hollow parts of the insulating wire cores 5 and the fixed cloth 4;

and 4, step 4: an inner cushion layer 3 is arranged on the fixed cloth 4 through extrusion or wrapping, and the material of the inner cushion layer 3 is a low-smoke halogen-free flame-retardant B-grade sheath material;

and 5: the steel belt 2 is arranged outside the inner cushion layer 3, the outer sheath 1 is arranged outside the steel belt 2 in an extrusion wrapping mode, and the outer sheath 1 is made of low-smoke halogen-free flame-retardant B-level sheath material.

The twisting equipment reduces damage to the battery cell when twisting, and comprises a fixed seat 100, a fixed disc 200, an auxiliary fixed part 300 and a guide part 400;

the upper end of the fixed seat 100 is provided with a fixed disk 200, a through hole for a plurality of wires to pass through is formed in the middle of the fixed disk 200, the inner wall of the through hole is rotatably provided with a rotating ring 403 through a rotating bearing, the rotating ring 403 is connected with a fixed ring 402 through a positioning rod 401, the fixed ring 402 is far away from the plane of the fixed disk 200, a plurality of guide beads 404 are distributed on the fixed ring 402 in an array manner, the guide beads 404 are rotatably arranged on the fixed ring 402 through the fixed bearing, when the wires pass through the through hole, the guide columns 404 can guide the wires, the sliding friction between the wires and the surface of the through hole is prevented, and the damage to the;

at least two auxiliary fixing parts 300 are distributed on the outer side of the fixed disk 200 in an array manner, the auxiliary fixing parts 300 are used for guiding and fixing a single wire, each auxiliary fixing part 300 comprises two symmetrically arranged clamping fixing rods 302, the inner ends of the clamping fixing rods 302 are rotatably arranged on the fixed disk 200, one side of each clamping fixing rod 302 is provided with a resetting rod 305, each resetting rod 305 is connected with the fixed disk 200 through a resetting spring 306, side rods perpendicular to the different surfaces of the resetting rods 305 are symmetrically arranged on the two sides of each clamping fixing rod 302 close to the resetting rods 305, first guide balls 301 are rotatably arranged on the side rods, stress rods parallel to the resetting rods 305 are arranged on the surfaces of the clamping fixing rods 302, third guide balls 304 are rotatably arranged on the stress rods, and limiting rods parallel to the stress rods and used for limiting the wires are arranged at the ends of the clamping fixing rods 302, a second guide ball 303 is rotatably arranged on the limiting rod; the two stress rods and the two reset rods are arranged in a staggered manner;

when the wire passed auxiliary fixed part 300, the wire can produce an extrusion force to two atress poles for two centre gripping dead levers 302 hold the wire tightly, thereby accomplish the location to the wire, prevent that the wire from droing, when assisting fixedly, three wire ball and wire surface rolling friction, thereby very big reduction the friction loss, thereby guaranteed the quality of cable.

In practical use, a plurality of wires pass through the auxiliary fixing member 300 outside the fixed tray 200, then pass through the through holes of the fixed tray 300, and finally are wound by the winding and pulling member, so that the twisting of the plurality of wires is completed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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. Any reference sign in a claim should not be construed as limiting the claim concerned.

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. The stranding equipment of the polyethylene high-flame-retardant power cable comprises a core layer and fixing cloth (4) arranged on the outer side of the core layer, wherein the core layer is formed by stranding at least more than two insulating wire cores (5);

the insulated wire core (5) consists of an insulating layer (53), a fire-resistant layer (52) and a conductor (51) from outside to inside, the conductor (51) consists of a plurality of annealed round copper wires, the annealed round copper wires are twisted together in a regular twisting mode, and the fire-resistant layer (52) is arranged outside the conductor (51);

the fire-resistant layer (52) is made of synthetic mica tape;

an insulating layer (53) is arranged outside the round conductor (51), and the insulating layer (53) is uniformly and tightly covered on the fire-resistant layer (52) in a circular ring shape;

a plurality of insulating wire cores (5) need to be twisted together through twisting equipment, filling layers (6) are arranged among the insulating wire cores (5) and in the hollow parts of the insulating wire cores (5) and the fixing cloth (4), and the filling layers (6) are alkali-free flame-retardant rock wool ropes;

an inner cushion layer (3) is arranged outside the fixed cloth (4), the inner cushion layer (3) is arranged outside the fixed cloth (4) in an extruding or wrapping mode, and the inner cushion layer is made of a low-smoke halogen-free flame-retardant B-grade sheath material;

a steel belt (2) is arranged outside the inner cushion layer (3), the steel belt (2) adopts a double-layer gap wrapping structure, and an outer layer strip of the steel belt (2) is in the middle of an inner layer strip of the steel belt in a wrapping gap;

an outer sheath (1) is arranged outside the steel belt (2), and the outer sheath (1) is arranged outside the steel belt (2) in an extrusion coating mode;

the twisting device is characterized by comprising a fixed seat (100), a fixed disc (200), an auxiliary fixing part (300) and a guide part (400); the upper end of the fixed seat (100) is provided with a fixed disk (200), a through hole for a plurality of wires to pass through is formed in the middle of the fixed disk (200), the inner wall of the through hole is rotatably provided with a rotating ring (403) through a rotating bearing, the rotating ring (403) is connected with a fixed ring (402) through a positioning rod (401), the fixed ring (402) is far away from the plane where the fixed disk (200) is located, a plurality of guide beads (404) are distributed on the fixed ring (402) in an array manner, and the guide beads (404) are rotatably arranged on the fixed ring (402) through the fixed bearing; at least two auxiliary fixing parts (300) are distributed on the outer side of the fixed disc (200) in an array mode, the auxiliary fixing parts (300) are used for guiding and fixing a single wire, each auxiliary fixing part (300) comprises two symmetrically-arranged clamping fixing rods (302), the inner end parts of the clamping fixing rods (302) are rotatably arranged on the fixed disc (200), one reset rod (305) is arranged on one side, opposite to each other, of each clamping fixing rod (302), each reset rod (305) is connected with the fixed disc (200) through a reset spring (306), side rods perpendicular to the different surfaces of the reset rods (305) are symmetrically arranged on two sides of each clamping fixing rod (302) close to each reset rod (305), first guide balls (301) are rotatably arranged on the side rods, stress rods parallel to the reset rods (305) are arranged on the surfaces of the clamping fixing rods (302), and third guide balls (304) are rotatably arranged on the stress rods, a limiting rod which is parallel to the stress rod and used for limiting a lead is arranged at the end part of the clamping fixing rod (302), and a second guide ball (303) is rotatably arranged on the limiting rod; two atress poles, two release links all stagger the setting.