CN112397249A

CN112397249A - High-flexibility torsion-resistant overhead insulated cable

Info

Publication number: CN112397249A
Application number: CN201910763291.2A
Authority: CN
Inventors: 吴学明; 吴迪
Original assignee: Jiangsu Ruiyang Cable Co ltd
Current assignee: Jiangsu Ruiyang Cable Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2021-02-23

Abstract

The invention discloses a high-flexibility anti-torsion overhead insulated cable in the technical field of cables, which comprises an inner protective layer, wherein four groups of reinforced isolation plates are arranged on the inner wall of the periphery of a lining pipe in an annular array, one opposite ends of the four groups of reinforced isolation plates are fixedly connected with anti-tension structure layers, the inner cavity of the lining pipe is divided into four cavities by the four groups of reinforced isolation plates and the anti-tension structure layers, a group of cable cores are arranged in each cavity, phenolic foam is filled between each cable core and each cavity, the bending resistance and the torsion resistance of the whole cable are improved by the arranged inner rubber reinforcing rib structures and the inner rubber reinforcing rib structures, the bending resistance and the torsion resistance of the whole cable are further improved by the arranged anti-tension metal wires and the reinforced steel stranded wires, and when one group of cable cores is on fire, other groups of cable cores are not influenced by the flame retardant action of the phenolic foam and the reinforced isolation plates, the integrity of the cable core is protected to the maximum extent, and the cable core can be conveniently recycled.

Description

High-flexibility torsion-resistant overhead insulated cable

Technical Field

The invention relates to the technical field of cables, in particular to a high-flexibility anti-torsion overhead insulated cable.

Background

The cable needs to be repeatedly pulled, twisted and dragged when being installed and rolled, long-time high-strength twisting work causes knotting and deformation of the cable, and the metal cable core inside the cable is exposed and broken, so that the service life of the cable is greatly prolonged, and the operation safety is greatly reduced.

Disclosure of Invention

The present invention aims to provide an overhead insulated cable with high flexibility and torsion resistance to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high flexibility anti torsional aerial insulated cable, includes the interior protective layer, the interior protective layer outer wall has cup jointed the outer protective layer, the interior protective layer inner chamber has set gradually wearing layer and interior bushing pipe from outside to inside, interior bushing pipe inner wall annular array all around is provided with four groups and strengthens the division board, four groups strengthen the division board relative one end fixedly connected with stretch-proofing structural layer, stretch-proofing structural layer inner chamber is provided with stretch-proofing wire, four groups strengthen division board and stretch-proofing structural layer and divide into four cavitys with the inside lining pipe inner chamber, and all be provided with a set of cable core in every cavity, it has phenolic foam to fill between cable core and the cavity, interior bushing pipe outer wall annular array all around is provided with interior rubber strengthening rib structure, just the wearing layer inner wall is provided with the spout with interior rubber strengthening rib structure matched with.

Furthermore, grooves are formed in the four groups of outer wall annular arrays of the inner protection layer, and reinforced steel strands are arranged in inner cavities of the grooves.

Further, outer rubber reinforcing rib structure is provided with to outer wall annular array all around of outer protective layer, outer rubber reinforcing rib structure longitudinal section can be rectangle and trapezoidal, and the trapezoidal cross-sectional width that is close to outer protective layer one side is greater than the cross-sectional width who keeps away from outer protective layer one side.

Furthermore, the width of the sliding groove is larger than that of the inner rubber reinforcing rib structure, and the wear-resistant layer, the outer protective layer and the inner protective layer are all made of rubber materials.

Furthermore, the reinforced isolation plate is an elastic support plate made of rubber materials, and a flame-retardant layer woven by glass fiber is sleeved on the outer wall of the reinforced isolation plate.

Further, the stretch-resistant metal wire is woven by fine steel wires.

Compared with the prior art, the invention has the beneficial effects that: the holistic anti buckling of cable, the antitorque commentaries on classics ability has been improved through the interior rubber strengthening rib structure and the interior rubber strengthening rib structure that set up, and the holistic anti buckling of cable, the antitorque commentaries on classics ability are further improved in the setting of stretch-proofing wire and reinforcing steel strand wires, when one of them group cable core is on fire, because phenolic foam and several other groups of cable cores of the flame retardant efficiency of strengthening the division board do not receive and cause the influence, the integrity of furthest protection cable core, can be convenient for retrieve and reuse (retrieve and preserve complete cable core in the cable after on fire).

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: 1. an inner protective layer; 2. an outer protective layer; 3. a wear layer; 4. a liner tube; 5. reinforcing the insulation board; 6. a tensile structural layer; 7. a tensile wire; 8. a cable core; 9. phenolic foam; 10. an inner rubber reinforcing rib structure; 11. a chute; 12. an outer rubber reinforcing rib structure; 13. a groove; 14. and (5) reinforcing the steel strand.

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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a high-flexibility anti-torsion aerial insulated cable, which has the advantages of torsion resistance and strong tensile resistance, and please refer to figure 1, which comprises an inner protective layer 1, wherein an outer protective layer 2 is sleeved on the outer wall of the inner protective layer 1, an inner cavity of the inner protective layer 1 is sequentially provided with a wear-resistant layer 3 and an inner lining pipe 4 from outside to inside, the inner lining pipe 4 is a cylindrical structure made of flame-retardant materials, four groups of reinforced isolation plates 5 are arranged on the inner wall of the periphery of the inner lining pipe 4 in an annular array manner, the reinforced isolation plates 5 play a supporting role and can improve the compressive resistance of the cable, opposite ends of the four groups of reinforced isolation plates 5 are fixedly connected with tensile structure layers 6, the inner cavity of the tensile structure layer 6 is provided with tensile metal wires 7 which can improve the tensile resistance of the cable, the inner cavity of the tensile pipe 4 is divided into four cavities by the four groups of reinforced isolation plates 5, phenolic foam 9 is filled between the cable core 8 and the cavity, when one group of cable cores 8 is on fire, other groups of cable cores 8 are not affected due to the flame retardant effect of the phenolic foam 9 and the reinforced isolation plate 5, the integrity of the cable core 8 is protected to the maximum extent, the cable cores can be conveniently recycled (the complete cable cores 8 are stored in the cable after the fire is drawn out), the inner rubber reinforcing rib structures 10 are arranged on the annular array of the peripheral outer wall of the inner lining tube 4, the inner wall of the wear-resistant layer 3 is provided with the sliding grooves 11 matched with the inner rubber reinforcing rib structures 10, when the cable is bent and twisted, the inner rubber reinforcing rib structures 10 can slide in the sliding grooves 11, and the anti-torsion and anti-stretching capability of the cable can be further improved;

referring to fig. 1, grooves 13 are formed in four groups of outer walls of the inner protection layer 1 in an annular array, and reinforced steel strands 14 are arranged in inner cavities of the grooves 13, so that the tensile resistance and bending resistance of the inner protection layer 1 are improved;

referring to fig. 1, the outer rubber reinforcing rib structures 12 are arranged on the outer wall of the periphery of the outer protection layer 2 in an annular array manner, the longitudinal sections of the outer rubber reinforcing rib structures 12 can be rectangular or trapezoidal, and the width of the section of the trapezoid close to the outer protection layer 2 is larger than that of the section far away from the outer protection layer 2, so that when the cable is stressed, twisted and bent, the outer rubber reinforcing rib structures 12 can deform, and the bending resistance and tensile resistance of the outer protection layer 2 can be improved;

referring to fig. 1, the width of the sliding groove 11 is greater than the width of the inner rubber reinforcing rib structure 10, the inner rubber reinforcing rib structure 10 can be deformed to slide in the sliding groove 11 when the cable is bent, so that the bending resistance of the cable is further improved, and the wear-resistant layer 3, the outer protective layer 2 and the inner protective layer 1 are all made of rubber materials, so that rubber has strong aging resistance due to the characteristics of chemical components of rubber;

referring to fig. 1, the reinforced isolation plate 5 is an elastic support plate made of rubber material, and a flame retardant layer woven by glass fiber is sleeved on the outer wall of the reinforced isolation plate, so that the flame retardant capability of the reinforced isolation plate 5 is improved;

referring to fig. 1, the stretch-resistant metal wire 7 is woven from thin steel wires to improve the bending resistance and torsion resistance of the stretch-resistant structure layer 6.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A high-flexibility torsion-resistant overhead insulated cable comprises an inner protective layer (1) and is characterized in that: the outer wall of the inner protective layer (1) is sleeved with the outer protective layer (2), the inner cavity of the inner protective layer (1) is sequentially provided with the wear-resistant layer (3) and the inner lining pipe (4) from outside to inside, annular arrays of the inner wall around the inner lining pipe (4) are provided with four groups of reinforced isolation plates (5) and anti-stretching structural layers (6) which are fixedly connected with the relative ends of the reinforced isolation plates (5), the inner cavity of each anti-stretching structural layer (6) is provided with anti-stretching metal wires (7) and four groups of reinforced isolation plates (5) and anti-stretching structural layers (6) divide the inner cavity of the inner lining pipe (4) into four cavities, a group of cable cores (8) is arranged in each cavity, phenolic foam (9) is filled between each cable core (8) and each cavity, the annular arrays of the outer wall around the inner lining pipe (4) are provided with inner rubber reinforcing rib structures (10), and 11).

2. A highly flexible torsion resistant overhead insulated cable according to claim 1, characterized in that: the four groups of outer wall annular arrays of the inner protection layer (1) are provided with grooves (13), and reinforcing steel strands (14) are arranged in inner cavities of the grooves (13).

3. A highly flexible torsion resistant overhead insulated cable according to claim 1, characterized in that: outer protective layer (2) outer wall annular array all around is provided with outer rubber strengthening rib structure (12), outer rubber strengthening rib structure (12) longitudinal section can be rectangle and trapezoidal, and the trapezoidal cross-sectional width that is close to outer protective layer (2) one side is greater than the cross-sectional width who keeps away from outer protective layer (2) one side.

4. A highly flexible torsion resistant overhead insulated cable according to claim 1, characterized in that: the width of the sliding groove (11) is larger than that of the inner rubber reinforcing rib structure (10), and the wear-resistant layer (3), the outer protective layer (2) and the inner protective layer (1) are all made of rubber materials.

5. A highly flexible torsion resistant overhead insulated cable according to claim 1, characterized in that: the reinforced isolation plate (5) is an elastic support plate made of rubber materials, and a flame-retardant layer woven by glass fiber is sleeved on the outer wall of the reinforced isolation plate.

6. A highly flexible torsion resistant overhead insulated cable according to claim 1, characterized in that: the stretch-resistant metal wire (7) is formed by weaving thin steel wires.