CN210349366U

CN210349366U - Heavy flexible cable

Info

Publication number: CN210349366U
Application number: CN201921591726.1U
Authority: CN
Inventors: 郑飞; 柯宗海; 江生光
Original assignee: Fuzhou Tongerda Electric Wire & Cable Co ltd
Current assignee: Fujian Chaoyang wire and cable Co.,Ltd.
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-04-17
Anticipated expiration: 2029-09-24

Abstract

The utility model relates to the technical field of cables, specifically a heavy flexible cable, including transmitting electric transmission wire rod, wear-resisting fibre around covering, high strength wear-resisting rubber sheath and packing rubber, transmit the electric transmission wire rod setting at the intermediate position of cable inner chamber, it includes stranded tinned soft copper line and high-insulation ethylene-propylene rubber to transmit the electric transmission wire rod, stranded tinned soft copper line is the sinle silk of cable, high-insulation ethylene-propylene rubber parcel is in the outside of stranded tinned soft copper line, wear-resisting fibre establishes the outside at transmitting the electric transmission wire rod around the covering cover, wear-resisting fibre will transmit electric transmission wire rod tight hoop structure as an organic whole around the covering, wear-resisting fibre has the packing rubber around the covering and the packing in transmitting the wire rod clearance, high strength wear-resisting rubber sheath is outmost and the parcel of cable around. The flexible cable is compact in integral structure, strong in bending resistance and flexibility, and can withstand repeated stretching, bending, twisting and other actions without breaking.

Description

Heavy flexible cable

Technical Field

The utility model relates to the technical field of cables, specifically a heavy flexible cable.

Background

The rubber-sheathed cable is a flexible and movable cable variety which takes a plurality of strands of fine copper wires as conductors and is wrapped with rubber insulation and a rubber sheath, wherein the heavy rubber-sheathed flexible cable needs to bear larger mechanical external force action and is widely used in the fields of hoisting machinery, mobile equipment and the like. The gantry crane comprises hoisting machinery such as a crown block and a travelling crane, is widely applied to industrial and mining enterprises such as ports, docks, shipbuilding, logistics centers and construction projects, and is a support column machinery and important equipment for conveying hoisted objects in production and construction. With the rapid development of economy in China, the application of the cable is more and more extensive, and the demand of rubber jacketed flexible cables for starting cranes and mobile equipment is increased. The cable mainly plays the role of transmitting electric energy and monitoring signals, and is a matched part for determining the production efficiency of hoisting and transporting machinery and mobile equipment. However, in the using process of the cable, due to the action of mechanical stress such as frequent reciprocating movement, continuous bending, torsion, stretching with inertia dragging and the like, the superposition and concentration of the stress such as bending, stretching and the like exceed the elastic limit of the cable material to generate irreversible traces, and finally the cable conductor is broken.

At present, due to the defects of certain defects of material selection of cables, small cable sections and the like, the common service life of heavy rubber jacketed flexible cables for hoisting machinery, mobile equipment and other equipment in China is short, so that the problem that how to improve the service life of the cables through material selection and structure improvement is urgently to be solved at present is solved.

Chinese patent (granted publication No. CN 205508439U) discloses an elastomer insulated and sheathed heavy flexible cable, which has a structure that the stability between the whole cable cores is insufficient, so that the closeness between the whole cable and the built-in cable cores needs to be improved, and a precise processing technology is required.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heavy flexible cable to solve the problem that proposes among the above-mentioned background art.

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

the utility model provides a heavy flexible cable, includes that electricity transmits wire rod, wear-resisting fibre around covering, high strength wear-resisting rubber sheath and packing rubber, electricity transmits the wire rod setting at the intermediate position of cable inner chamber, electricity transmits the wire rod and is provided with a plurality of ways and wait the angle and wear to locate the cable inner chamber, electricity transmits the wire rod and includes stranded tinned soft copper line and high-insulation ethylene-propylene rubber, stranded tinned soft copper line is the sinle silk of cable, high-insulation ethylene-propylene rubber parcel is in the outside of stranded tinned soft copper line, wear-resisting fibre establishes the outside at electricity transmitting the wire rod around the covering cover, wear-resisting fibre will transmit the wire rod tight hoop structure as an organic whole around the covering, wear-resisting fibre has the packing rubber around filling in covering and electricity transmitting the wire rod clearance, high strength wear-resisting rubber sheath is out.

As a further aspect of the present invention: the multi-strand tinned soft copper wire is formed by twisting a plurality of tinned copper wires together in a certain direction and in a certain arrangement mode (the pitch diameter ratio of the twisted wires is not more than 10), the middle part of the multi-strand tinned soft copper wire is twisted in a small pitch mode to serve as an inner conductor, a plurality of layers of tinned copper wires are woven around the multi-strand tinned soft copper wire to serve as an outer conductor, the weaving density is not less than 90%, the stability of the wire is improved, the direct current resistance of the wire is guaranteed to meet the requirement of GB/T3956, the structure is compact.

As a further aspect of the present invention: the high-insulation ethylene-propylene rubber is a copolymer synthesized by taking ethylene and propylene as basic monomers.

As a further aspect of the present invention: the wear-resistant fiber wrapping layer is formed by weaving quantitative strand number and spindle number by a weaving machine, the weaving density is required to be not lower than 80%, the weaving layer is a nylon wire weaving layer, the nylon wire weaving layer respectively wraps each insulated wire core, and friction between the wire cores in the operation of the cable is reduced by the wear-resistant performance of nylon.

As a further aspect of the present invention: the filling rubber is made of chlorinated polyethylene, has the advantages of tear resistance, oil resistance, weather resistance, bending resistance and the like, is high in smoothness, and effectively reduces friction generated by internal force of the cable during operation.

As a further aspect of the present invention: the high-strength wear-resistant rubber sheath is formed by polymerizing polyester (or polyether) and diisocyanamide compounds. The wear resistance is 3-5 times of that of natural rubber, and is often about 10 times in practical application.

Compared with the prior art, the beneficial effects of the utility model are that:

the high-insulation ethylene propylene rubber plays a role in molding and protecting the multi-strand tinned annealed copper wires, and has the advantages of compact integral structure, strong bending resistance and flexibility, and no fracture under the actions of repeated stretching, bending, twisting and the like.

Wear-resisting fibre is used for carrying out double-deck protection to the cable around covering and high strength wear-resisting rubber sheath in this application, wear-resisting fibre is filled with the packing rubber around covering and the electricity transmission wire rod clearance, and the whole integrated structure that forms effectively reduces the friction that its internal force of cable operation produced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

In the figure: the cable comprises 1-an electric transmission wire, 2-high-insulation ethylene propylene rubber, 3-a plurality of strands of tinned annealed copper wires, 4-a wear-resistant fiber wrapping layer, 5-a high-strength wear-resistant rubber sheath and 6-a filling rubber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, examples of which are shown in the drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements, unless otherwise indicated.

It is to be understood that the embodiments described are only some embodiments of the invention, and 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.

Referring to fig. 1 and 2, a heavy flexible cable comprises an electric transmission wire 1, a wear-resistant fiber wrapping layer 4, a high-strength wear-resistant rubber sheath 5 and a filling rubber 6, wherein the electric transmission wire 1 is arranged in the middle of an inner cavity of the cable, the electric transmission wire 1 is provided with a plurality of channels and penetrates through the inner cavity of the cable at equal angles, the electric transmission wire 1 comprises a plurality of strands of tinned flexible copper wires 3 and a high-insulation ethylene-propylene rubber 2, the plurality of strands of tinned flexible copper wires 3 are wire cores of the cable, the high-insulation ethylene-propylene rubber 2 is wrapped on the outer sides of the plurality of strands of tinned flexible copper wires 3, the plurality of strands of tinned flexible copper wires 3 are twisted together in a certain direction (the twist pitch ratio is not more than 10), the tinned flexible copper wires are twisted at small pitches in the middle to serve as inner conductors, the plurality of tinn, the stability of the lead is improved, the direct current resistance of the lead meets the requirement of GB/T3956, the lead has compact structure and strong bending resistance and flexibility, and the lead can withstand repeated stretching, bending, twisting and other actions without breaking. The high-insulation ethylene-propylene rubber 2 is a copolymer synthesized by taking ethylene and propylene as basic monomers. The multi-strand tinned annealed copper wire 3 is molded and protected.

This application arranges the transposition through 3 stranded tinned annealed copper wires, improves the degree of weaving of sinle silk, improves wire stability, guarantees that its direct current resistance satisfies GB/T3956 requirement, and high-insulation ethylene-propylene rubber 2 plays the effect of moulding and protection to 3 stranded tinned annealed copper wires, and overall structure is inseparable, and anti bending flexibility is strong, can stand effect such as tensile, bending, twist reverse repeatedly and not fracture.

Wear-resisting fiber establishes in the outside of transmitting electric wire rod 1 around covering 4 cover, wear-resisting fiber will transmit electric wire rod 1 tight hoop as an organic whole structure around covering 4, wear-resisting fiber has packing rubber 6 around filling in covering 4 and the 1 clearance of transmitting electric wire rod, wear-resisting rubber sheath 5 of high strength is the outmost of cable and wraps up in the wear-resisting fiber around the covering 4 outside.

The filling rubber 6 is made of chlorinated polyethylene, has the advantages of tear resistance, oil resistance, weather resistance, bending resistance and the like, is high in smoothness, and effectively reduces friction generated by internal force when the cable runs.

The wear-resistant fiber wrapping layer 4 is formed by weaving quantitative strand number and spindle number by a weaving machine, the weaving density is required to be not lower than 80%, the weaving layer is a nylon wire weaving layer, the nylon wire weaving layer respectively wraps each insulated wire core, and friction between the wire cores in the operation process of the cable is reduced by using the wear-resistant performance of nylon.

The high-strength wear-resistant rubber sheath 5 is formed by polymerizing polyester (or polyether) and diisocyanamide compounds. The wear resistance is 3-5 times of that of natural rubber, and is often about 10 times in practical application.

Wear-resisting fiber is used for carrying out double-deck protection to the cable around covering 4 and high strength wear-resisting rubber sheath 5 in this application, wear-resisting fiber has packing rubber 6 around filling in covering 4 and the 1 clearance of electricity transmission wire rod, and the whole integration structure that forms effectively reduces the friction that its internal force of cable operation produced.

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 utility model provides a heavy flexible cable, includes that electricity transmits wire rod (1), wear-resisting fibre around covering (4), high strength wear-resisting rubber sheath (5) and packing rubber (6), its characterized in that, electricity transmits wire rod (1) and sets up the intermediate position at the cable inner chamber, electricity transmits wire rod (1) and is provided with a plurality of ways and wait the angle and wear to locate the cable inner chamber, electricity transmits wire rod (1) and includes stranded tinned annealed copper line (3) and high-insulation ethylene-propylene rubber (2), stranded tinned annealed copper line (3) is the sinle silk of cable, high-insulation ethylene-propylene rubber (2) parcel is in the outside of stranded tinned annealed copper line (3), wear-resisting fibre establishes in the outside of electricity transmitting wire rod (1) around covering (4), wear-resisting fibre layer (4) is with electricity transmitting wire rod (1) lock ring formula structure as an organic whole, wear-resisting fibre layer (4) and electricity transmit the packing in wire rod (1) clearance and have, the high-strength wear-resistant rubber sheath (5) is the outermost layer of the cable and wraps the wear-resistant fiber wrapping layer (4).

2. The heavy flexible cable as claimed in claim 1, wherein the plurality of strands of tinned soft copper wires (3) are twisted together in a certain direction and arrangement, the tinned soft copper wires are twisted in the middle at a small pitch to serve as inner conductors, the tinned copper wires are braided in layers at the periphery to serve as outer conductors, and the braiding density is not less than 90%.

3. A heavy duty flexible cable according to claim 1, wherein said high insulating ethylene-propylene rubber (2) is a copolymer synthesized from ethylene and propylene as base monomers.

4. The heavy flexible cable according to claim 1, wherein the wear-resistant fiber lapping layer (4) is formed by weaving quantitative strand number and spindle number by using a weaving machine, the weaving density is required to be not lower than 80%, the weaving layers are nylon wire weaving layers which respectively wrap each insulated wire core, and the friction between the wire cores in the cable operation is reduced by using the wear resistance of nylon.

5. The heavy flexible cable according to claim 1, wherein the filling rubber (6) is chlorinated polyethylene, which has the advantages of tear resistance, oil resistance, weather resistance, bending resistance and the like, and has high smoothness, and the friction generated by the internal force of the cable in operation can be effectively reduced.

6. The heavy duty flexible cable according to claim 1, wherein the high strength abrasion resistant rubber sheath (5) is formed by polymerizing polyester or polyether with diisocyanamide lipid compound.