CN216053934U

CN216053934U - Flexible waterproof flexible cable

Info

Publication number: CN216053934U
Application number: CN202121774561.9U
Authority: CN
Inventors: 乜福君; 鲍大章; 陈锡钱
Original assignee: Chizhou Qifan Cable Co ltd
Current assignee: Chizhou Qifan Cable Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-15
Anticipated expiration: 2031-07-30

Abstract

The utility model provides a flexible waterproof flexible cable, and relates to the technical field of cables. The cable comprises from outside to inside in sequence: the cable comprises an outer sheath layer, an inner sheath layer, a first isolation layer and a cable core; the cable core is formed by stranding fillers and a plurality of wire cores; the wire core sequentially comprises from outside to inside: an insulating layer, a second isolation layer and a metal conductor; the metal conductor is formed by twisting copper wires firstly and then repeatedly, and the caulking space of the metal conductor is filled with water-blocking yarns. In the embodiment of the utility model, the first isolation layer, the filler and the second isolation layer are made of the water blocking tapes and/or the water blocking yarns and/or the water blocking ropes, which contain water-absorbent resin components, can quickly absorb water and block the water through expansion, damaged points and cavities are immediately sealed, and the water cannot further permeate, so that the growth of water trees is prevented; the insulating layer, the inner sheath layer and the outer sheath layer are made of high-molecular rubber, so that the hydrophobic property is good, and water molecules are not easy to permeate; so that the cable has excellent waterproof performance.

Description

Flexible waterproof flexible cable

Technical Field

The utility model relates to the technical field of cables, in particular to a flexible waterproof flexible cable.

Background

Waterproof flexible cable often lays in under water, perhaps often soaks or moist place, if the cable intaking, will lead to the conductor oxidation, increases the contact resistance between the conductor single line to increase cable conductor's resistance, lead to the increase of cable core loss.

After the ethylene propylene rubber insulating layer of the cable absorbs water, water branches are formed under the action of an electric field, the generation of the water branches can cause the increase of the loss of an insulating medium, and meanwhile, the insulation resistance and the insulation breakdown voltage are reduced, the aging speed is accelerated, and the service life of the cable is shortened. More seriously, the water tree branches are oxidized and converted under the action of an electric field or for a long time, and finally, the water tree branches not only can generate electric tree branches at the tips of the water tree branches, but also can be converted into the electric tree branches. It is known that partial discharge of the cavity of the electrical tree, which is continuously expanded, can cause the insulation of the cable to be broken down in a short period of time, and the use reliability of the cable is seriously affected.

Therefore, a product with excellent waterproof performance, good electrical performance and strong use reliability is urgently needed to be developed.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a flexible waterproof flexible cable, which solves the problem of weak waterproof performance of the cable.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a flexible waterproof flexible cable, the cable includes from outside to inside in proper order: the cable comprises an outer sheath layer, an inner sheath layer, a first isolation layer and a cable core;

the cable core is formed by stranding fillers and a plurality of wire cores;

the wire core sequentially comprises from outside to inside: an insulating layer, a second isolation layer and a metal conductor; the metal conductor is formed by twisting copper wires firstly and then repeatedly, and the caulking space of the metal conductor is filled with water-blocking yarns.

Preferably, the wire core comprises: a plurality of power wire cores with the same type and a plurality of ground wire cores with the same type; the number of the power wire cores is not less than two, and the number of the ground wire cores is not less than one.

Preferably, the first isolation layer is arranged outside the cable core in a wrapping mode, and the second isolation layer is arranged outside the metal conductor in a wrapping or longitudinal wrapping mode.

Preferably, the cable internal caulking is filled with water blocking yarns and/or water blocking ropes and/or rubber strips.

Preferably, the copper wire comprises: tinned and/or bare copper wire, the diameter of the copper wire comprising: 0.20mm, 0.30mm, 0.40mm, 0.50 mm.

Preferably, the pitch-diameter ratio of the metal conductor strand bundle wire is controlled to be 18-24 times; the pitch diameter ratio of the outermost layer of the compound twisting is controlled to be 12-15 times, and the pitch diameter ratio of each layer of the compound twisting from outside to inside is 1-2 times larger than that of the adjacent outer layer.

Preferably, the binding wires and the complex twisting directions of the metal conductors are consistent.

Preferably, the first isolation layer, the filler and the second isolation layer are made of water-blocking tapes or water-blocking yarns or water-blocking ropes.

Preferably, the insulating layer and the inner sheath layer are both made of waterproof ethylene propylene rubber; the outer sheath layer is made of chlorinated polyethylene rubber compound or chloroprene rubber compound.

(III) advantageous effects

The utility model provides a flexible waterproof flexible cable. Compared with the prior art, the method has the following beneficial effects:

according to the utility model, the metal conductor is stranded by adopting copper wires in the same direction and at a small pitch, and has high flexibility and tensile property; the first isolation layer, the filler and the second isolation layer are made of water-blocking tapes and/or water-blocking yarns and/or water-blocking ropes, all contain water-absorbent resin components, can quickly absorb water, block the water through expansion, immediately seal damaged points and cavities, and prevent the water from further permeating, so that the growth of water trees is prevented; the insulating layer, the inner sheath layer and the outer sheath layer are made of high-molecular rubber, so that the hydrophobic property is good, and water molecules are not easy to permeate; the cable has excellent waterproof performance and is particularly suitable for electrical equipment which works underwater, such as a submersible motor, a submersible electric pump, an underwater landscape lamp and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a cable according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but 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 embodiment of the application provides a flexible waterproof flexible cable, and solves the problem of weak waterproof performance of the cable.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

in the embodiment of the utility model, the metal conductor is stranded by adopting copper wires in the same direction and at a small pitch, and has high flexibility and tensile property; the first isolation layer, the filler and the second isolation layer are made of water-blocking tapes and/or water-blocking yarns and/or water-blocking ropes, all contain water-absorbent resin components, can quickly absorb water, block the water through expansion, immediately seal damaged points and cavities, and prevent the water from further permeating, so that the growth of water trees is prevented; the insulating layer, the inner sheath layer and the outer sheath layer are made of high-molecular rubber, so that the hydrophobic property is good, and water molecules are not easy to permeate; the cable has excellent waterproof performance and is particularly suitable for electrical equipment which works underwater, such as a submersible motor, a submersible electric pump, an underwater landscape lamp and the like.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Example (b):

as shown in fig. 1, the present invention provides a flexible waterproof flexible cable, which sequentially comprises from outside to inside: the cable comprises an outer sheath layer 1, an inner sheath layer 2, a first isolation layer 3 and a cable core;

the cable core is formed by stranding filler 4 and a plurality of wire cores;

the wire core sequentially comprises from outside to inside: an insulating layer 5, a second isolation layer 6 and a metal conductor 7; the metal conductor 7 is formed by twisting copper wires firstly and then repeatedly, and the caulking space of the metal conductor 7 is filled with water-blocking yarn (not shown in the figure).

The core comprises: a plurality of power wire cores with the same type and a plurality of ground wire cores with the same type; the number of the power wire cores is not less than two, and the number of the ground wire cores is not less than one.

First isolation layer 3 is around the package and is set up outside the cable core, and second isolation layer 6 is around the package or indulges the package and set up outside metal conductor 7.

And the inner caulking of the cable is filled with water-blocking yarns and/or water-blocking ropes and/or rubber strips.

The copper wire includes: tinned and/or bare copper wire, the diameter of the copper wire comprising: 0.20mm, 0.30mm, 0.40mm, 0.50 mm.

The pitch-diameter ratio of the 7-strand wire bundle of the metal conductor is controlled to be 18-24 times; the pitch diameter ratio of the outermost layer of the compound twisting is controlled to be 12-15 times, and the pitch diameter ratio of each layer of the compound twisting from outside to inside is 1-2 times larger than that of the adjacent outer layer.

And the binding wires of the metal conductor 7 are consistent with the complex twisting direction.

The first isolation layer 3, the filler 4 and the second isolation layer 6 are made of water-blocking tapes or water-blocking yarns or water-blocking ropes, and contain water-swellable high-water-absorption materials called water-blocking agents, and the water-blocking agents can be rapidly swelled after encountering water to form large-volume jelly, and the water absorption capacity of the water-blocking agents can reach hundreds of times of the water-blocking agents, so that the water is prevented from continuously permeating and diffusing.

The insulating layer 5 and the inner sheath layer 2 are both made of waterproof ethylene propylene rubber; the outer sheath layer 1 is made of chlorinated polyethylene rubber compound or chloroprene rubber compound.

In summary, compared with the prior art, the utility model has the following beneficial effects:

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a flexible waterproof flexible cable which characterized in that, the cable includes from outer to interior in proper order: the cable comprises an outer sheath layer (1), an inner sheath layer (2), a first isolation layer (3) and a cable core;

the cable core is formed by stranding fillers (4) and a plurality of wire cores;

the wire core sequentially comprises from outside to inside: an insulating layer (5), a second isolation layer (6) and a metal conductor (7); the metal conductor (7) is formed by binding and then twisting copper wires, and the caulking space of the metal conductor (7) is filled with water-blocking yarns.

2. The flexible, water-resistant flexible cable of claim 1, wherein the wire core comprises: a plurality of power wire cores with the same type and a plurality of ground wire cores with the same type; the number of the power wire cores is not less than two, and the number of the ground wire cores is not less than one.

3. The flexible waterproof flexible cable according to claim 1, wherein the first insulating layer (3) is wrapped around the cable core, and the second insulating layer (6) is wrapped or longitudinally wrapped around the metal conductor (7).

4. The flexible waterproof flexible cable according to claim 1, wherein the cable internal caulking is filled with water blocking yarn and/or water blocking rope and/or rubber strip.

5. The flexible waterproof flexible cable of claim 1, wherein said copper wire comprises: tinned and/or bare copper wire, the diameter of the copper wire comprising: 0.20mm, 0.30mm, 0.40mm, 0.50 mm.

6. The flexible waterproof flexible cable according to claim 1, wherein the pitch-diameter ratio of the metal conductor (7) strand bundle filaments is controlled to be 18-24 times; the pitch diameter ratio of the outermost layer of the compound twisting is controlled to be 12-15 times, and the pitch diameter ratio of each layer of the compound twisting from outside to inside is 1-2 times larger than that of the adjacent outer layer.

7. The flexible waterproof flexible cable according to claim 1, wherein the strands and the complex twist direction of the metal conductor (7) are in agreement.

8. The flexible waterproof flexible cable according to any one of claims 1 to 7, wherein the first insulating layer (3), the filler (4) and the second insulating layer (6) are made of a water-blocking tape, a water-blocking yarn or a water-blocking rope.

9. The flexible waterproof flexible cable according to any one of claims 1 to 7, wherein the insulating layer (5) and the inner sheath layer (2) are both made of waterproof ethylene propylene rubber; the outer sheath layer (1) is made of chlorinated polyethylene rubber compound or chloroprene rubber compound.