CN218497807U

CN218497807U - Tensile type winding cable

Info

Publication number: CN218497807U
Application number: CN202222354377.XU
Authority: CN
Inventors: 李中义; 张林锐; 曹晨涛; 周勇; 吴盈鑫; 储香香; 蒋宇飞; 杨阳
Original assignee: Wuxi Huamei Cable Co ltd
Current assignee: Wuxi Huamei Cable Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-02-17
Anticipated expiration: 2032-09-05

Abstract

The utility model relates to the technical field of cables, in particular to a tensile type winding cable, which comprises a plurality of tangential main line wire cores and a plurality of twisted main line wire cores; the signal wire cores are arranged on the outer sides of the two main wire cores and tangent to the main wire cores; and the filling layer is filled between the main line wire core and the signal wire core and is wrapped into a cable core with a circular cross section by the wrapping layer. Set to a plurality of aramid fiber silk tensile ropes of circumference array distribution in the outside of cable core, can keep inboard cable core not receive the pulling force, aramid fiber silk tensile rope has better pull resistance and lighter quality simultaneously, when the length of cable long-term, aramid fiber silk can not cause the showing increase of cable gross weight, therefore, aramid fiber silk tensile rope still can keep good pull resistance, additionally, set up the foaming strip in the outside of aramid fiber silk bundle, can provide aramid fiber silk tensile rope's deformation space when crooked, reduce the stress that aramid fiber silk tensile rope bore, make the cable softer.

Description

Tensile type winding cable

Technical Field

The utility model belongs to the technical field of the cable technique and specifically relates to hang the coiling cable in the pit, relate to a tensile type hangs the coiling cable particularly.

Background

The shallow mineral resources are reduced and exhausted year by year, the mining of the mineral resources is already oriented to the deep mining and deep digging, at present, a considerable scale of metal mines have mining depths of 1000 meters or more, even 2000 meters to 3000 meters, higher requirements and safe service life pressure are put forward on applicable transportation lines, mechanical equipment and used hanging cables, and the hanging cables bear higher tensile force and bending stress.

At present, in the design of the coiled cable of the downhole flexible and high pressure bearing type, by additionally arranging tensile elements, such as steel strands, as tensile units between the conductive cores of the main wires, the weight of the whole cable is larger when the cable is longer, and the requirement for the central steel strand is higher, so that the diameter of the central steel strand is increased along with the increase of the length of the cable, which is disadvantageous for controlling the diameter of the whole cable.

SUMMERY OF THE UTILITY MODEL

To the defect that prior art exists or not enough, according to the utility model discloses the first aspect of purpose provides a tensile type coiling cable, include:

a plurality of main line wire cores which are tangent pairwise and are twisted with each other;

the signal wire cores are arranged on the outer sides of the two main wire cores and tangent to the main wire cores;

the filling layer is filled between the main line wire core and the signal wire core and is wrapped into a cable core with a circular section by the wrapping layer;

the inner sheath is extruded on the outer wall of the wrapping layer;

the outer sheath is extruded on the outer wall of the inner sheath;

the cable comprises an inner sheath and an outer sheath, wherein a plurality of tensile ropes distributed in a circumferential array mode are arranged between the inner sheath and the outer sheath, each tensile rope comprises a foaming strip and an aramid fiber rope, the aramid fiber ropes are located at the center of the foaming strip, and when the cable is bent, the aramid fiber ropes can be extruded along the radial direction of the foaming strip to enable the aramid fiber ropes to deviate from the center of the foaming strip.

Preferably, the aramid fiber rope comprises aramid fiber tows and steel wires, the steel wires are stranded with the aramid fiber tows, and the steel wires are arranged at the center positions of the aramid fiber tows in a plurality of modes.

Preferably, the outer wall of the inner sheath is provided with first semicircular grooves corresponding to the number of the tensile ropes, the inner wall of the outer sheath is provided with second semicircular grooves corresponding to the number of the tensile ropes, and when the first semicircular grooves and the second semicircular grooves are matched, a circular hole structure for accommodating the tensile ropes is formed.

Preferably, the thickness ratio of the inner sheath to the outer sheath is 4:6 or 3:7.

preferably, the inner sheath is an irradiation cross-linked polyethylene insulating layer, and the outer sheath is an irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin insulating layer.

Preferably, the foam strip is a polyethylene foam strip.

Preferably, the diameter of the foam strip is the same as the thickness of the inner sheath.

Preferably, the wrapping layer comprises a polyester tape wrapping layer, the number of the wrapping layers of the polyester tape wrapping layer is two, and the wrapping and covering rate is percent.

Preferably, the signal wire core comprises a stranded oxygen-free copper conductor, a semiconductor insulation shielding layer extruded on the outer wall of the oxygen-free copper conductor, and an insulation layer extruded on the outer wall of the semiconductor insulation shielding layer.

Preferably, the filling layer is a flame-retardant glass fiber filling layer.

Compared with the prior art, the utility model discloses a tensile type coiling cable's beneficial effect that is showing lies in:

the utility model discloses a plurality of aramid fiber silk tensile ropes of circumference array distribution are set to in the outside of cable core, can keep inboard cable core not receive the pulling force, aramid fiber silk tensile rope has better pull resistance and lighter quality simultaneously, when the length long time of cable, aramid fiber silk can not cause the showing increase of cable gross weight, therefore, aramid fiber silk tensile rope still can keep good pull resistance, additionally, set up the foaming strip in the outside of aramid fiber silk bundle, can provide aramid fiber silk tensile rope's deformation space when crooked, reduce the stress that aramid fiber silk tensile rope bore, make the cable softer.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing.

Fig. 1 is a schematic cross-sectional structure view of the tensile type suspended coiled cable of the present invention.

Fig. 2 is a schematic structural view of the aramid fiber rope of the present invention.

Figure 3 is a schematic view of the tension-type suspended coiled cable shown in figure 1 in a bent state.

Detailed Description

For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

In order to improve the tensile strength of the coiled cable, a steel wire is usually added to the center of the stranded conductor in the prior art, so that when the length of the cable is longer, the weight of the cable is larger, the diameter of the steel wire which is put in the middle is required to be higher, and the diameter and the weight of the whole cable are increased. The utility model discloses a purpose aims at under the great condition that changes the cable diameter not, through configuration optimization design, makes the cable reach better tensile ability and cable lightweight's purpose.

With reference to fig. 1, an example of a structure of a coiled cable that may be used for downhole suspension according to an exemplary embodiment includes a cable core 10 that is composed of a main line core 1, a signal core 2, a filling layer 3, and a wrapping layer 4, an inner sheath 5 and an outer sheath 6 are extruded outside the cable core 10, a plurality of tensile cords 7 distributed in a circumferential array are filled between the inner sheath 5 and the outer sheath 6, and the tensile cords 7 are used to make the cable have a better tensile effect. The detailed structure of the cable core 10 will be described in more detail in the following description.

In the present embodiment, the main wire core 1 is also referred to as a power wire core, and generally has a relatively large wire diameter. The signal core 2 also becomes a weak point core and typically has a relatively thin wire diameter.

As shown in fig. 1-2, a plurality of tensile cords 7 are disposed between the inner sheath 5 and the outer sheath 6 in a circumferential array. Because the tensile ropes 7 are arranged at the outer side of the cable core 10, the tensile ropes 7 outside the cable core 10 bear the tensile force when the cable core 10 is in a tensile state, particularly in a bending tensile state, and the length direction of the cable core 10 does not bear the tensile force.

As shown in fig. 2 to fig. 3, the tensile cord 7 includes a foam strip 71 and an aramid fiber cord 72, the aramid fiber cord 72 is located at a central position of the foam strip 71, and when the cable is bent, the aramid fiber cord 72 can radially press the foam strip 71, so that the aramid fiber cord 72 deviates from the central position of the foam strip 71.

Specifically, when the winding cable is operated and used, the tension applied to the inner side and the outer side of the cable is different, the tension of the aramid fiber ropes 72 on the outer side of the winding cable is large, so that the stress applied to the aramid fiber ropes 72 is reduced by pressing the foaming strips 71 during winding, and meanwhile, the tension applied to the cable core 10 on the inner side is small due to the fact that the aramid fiber ropes 72 bear the tension, and the cable is softer overall.

Thus, stress on the aramid fiber cord 72 when the cable is bent can be reduced, and the flexibility of the cable can be improved, so that the cable can be easily bent as a whole. In addition, the foaming strips 71 and the aramid fiber ropes 72 are made of light materials, so that the tensile strength is provided, the weight of the cable can be reduced, and the diameter size of the cable is kept.

Further, in order to increase the tensile property of the aramid fiber rope 72, the aramid fiber rope 72 includes an aramid fiber strand 722 and a steel wire 721, the steel wire 721 is twisted with the aramid fiber strand 722, and the steel wire 721 is located at the center of the plurality of aramid fiber strands 722. For example, the steel wire 721 and the 6 aramid tows 722 are twisted by the twisting method of 1+6 to form the aramid fiber rope 72, so that better tensile property can be achieved.

In the above embodiment, the outer wall of the inner sheath 5 is provided with a first semicircular groove corresponding to the number of the tensile cords 7, and the inner wall of the outer sheath 6 is provided with a second semicircular groove corresponding to the number of the tensile cords 7, so that when the first semicircular groove and the second semicircular groove are aligned, a circular hole structure for accommodating the tensile cords 7 is formed.

Specifically, the thickness ratio of the inner sheath 5 to the outer sheath 6 is 4:6 or 3.

The inner sheath 5 is preferably made of irradiation cross-linked polyethylene insulation layer, and the outer sheath 6 is preferably made of irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin insulation material.

Preferably, the foam strip 71 is a polyethylene foam strip.

In other embodiments, the foam strip 7 may be made of one of silicone, rubber, ethylene Propylene Diene Monomer (EPDM) and the like, and a foaming agent is added to the material to form the foam strip 71, so that the foam strip 71 has a soft texture.

To further increase the flexibility of the cable, the diameter of the foam strip 7 is the same as the thickness of the inner sheath 5.

Cable core

Referring to fig. 1, the cable core 10 includes a plurality of two-by-two tangent main line cores 1, a plurality of two-by-two tangent signal cores 2, and a filling layer 3 filled between the main line cores 1 and the signal cores 2. In the illustrated embodiment, three main wire cores 1 and three signal cores 2 are taken as an example for explanation.

The three main line wire cores 1 are twisted with the filling layer 3 between the signal wire cores 2 to be wrapped and fixed by the wrapping layer 4 to be circular in cross section.

Specifically, the main line core 1 includes a main line conductor 11 and a main line insulating layer 12. Main line conductor 11 is formed by stranding a plurality of oxygen-free copper conductors, the stranding pitch is 12-15, and a double-layer or three-layer stranding structure of 1+6 or 1+6+12 is adopted. The main line insulating layer 12 is an insulating layer made of polyethylene or fluororesin, and has high heat resistance, oil resistance, and acid and alkali resistance.

Further, the signal wire core 2 is tangent to the main wire core 1, wherein the signal wire core 2 comprises a stranded oxygen-free copper conductor 21, a semiconductor insulation shielding layer 22 extruded on the outer wall of the oxygen-free copper conductor 21, and an insulation layer 23 extruded on the outer wall of the semiconductor insulation shielding layer 22, and the semiconductor insulation shielding layer 22 and the insulation layer 23 are extruded by adopting a double-layer co-extrusion process.

The semiconductor insulating shielding layer 22 may be made of a commercially available semiconductor insulating shielding material.

Specifically, the semiconducting insulation shield layer 22 acts as a shield layer, is equipotential with the conductor being shielded, and is in good contact with the insulation layer, thereby preventing partial discharge from occurring between the conductor and the insulation layer. The material is selected from ethylene-vinyl acetate copolymer.

Further, a filling layer 3 for filling and fixing is arranged between the main line wire core 1 and the signal wire core 2, and the plurality of main line wire cores 1 are twisted with the signal wire cores 2. The filling layer 3 fills in between to make the roundness of the cable higher, and then the entire cable 10 is wrapped and fixed by the wrapping tape 4 to form a circular cross section.

Specifically, the filling layer 3 may be a glass fiber filling layer, and meets the ROHS test standard.

Specifically, wrap 4 includes that the polyester area winds the covering, and the polyester area winds the number of layers of wrapping of covering is two-layer, and it is 45% to lap the lid rate around the package.

As an alternative embodiment, the preparation process of the coiled cable of the present invention comprises: twisting the main line conductor 11 and the oxygen-free copper conductor 21 respectively, extruding a polyethylene insulating layer outside the main line conductor 11, and performing double-layer co-extrusion outside the oxygen-free copper conductor 21 to form a semiconductor insulating shielding layer and an insulating layer to form a wire core structure;

wrapping the main line wire core 1, the signal wire core 2 and glass fiber together into a cable core 10 with a circular section by a polyester tape;

firstly, extruding an inner sheath 5, constructing a plurality of semicircular grooves on the outer wall of the inner sheath 5 by using a die head, forming a smooth structure on the surface after irradiation treatment, placing a foaming strip 7 at the position of the semicircular grooves, simultaneously extruding an outer sheath 6, constructing a plurality of semicircular grooves on the inner wall of the outer sheath 6 by using the die head for the outer sheath 6 to surround the foaming strip 7, and performing irradiation treatment after the outer sheath 6 is extruded.

In combination with the above embodiment, the utility model discloses set a plurality of aramid fiber silk tensile ropes that the circumference array distributes to in the outside of cable core, can keep inboard cable core not to receive the pulling force, aramid fiber silk tensile rope has better tensile resistance and lighter quality simultaneously, and when the length of cable long term, aramid fiber silk can not cause showing the increase of cable gross weight, and aramid fiber silk tensile rope still can keep good tensile resistance. Simultaneously, combine the outside at aramid fiber silk bundle to set up the foaming strip, can provide the deformation space of aramid fiber silk tensile rope when crooked, reduce the stress that aramid fiber silk tensile rope bore, make the cable softer.

From this, through the utility model discloses a coiling cable makes the cable lightweight when having the pull resistance, and the cable diameter is unlikely to show the increase because of the length increase of cable.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.

Claims

1. A tension type coiled cable, comprising:

a plurality of main line wire cores (1) which are tangent pairwise and are twisted with each other;

the signal wire cores (2) are arranged on the outer sides of the two main wire cores (1) and tangent to the main wire cores (1);

the filling layer (3) is filled between the main line wire core (1) and the signal wire core (2) and is wrapped into a cable core (10) with a circular section by the wrapping layer (4);

the inner sheath (5) is extruded on the outer wall of the wrapping layer (4);

the outer sheath (6) is extruded on the outer wall of the inner sheath (5);

wherein, be equipped with between inner sheath (5) and oversheath (6) and be a plurality of stretch-proofing ropes (7) of circumference array distribution, stretch-proofing rope (7) are including foaming strip (71) and aramid fiber rope (72), aramid fiber rope (72) are in the central point of foaming strip (71) puts, when the cable is crooked, aramid fiber rope (72) can be along radial extrusion foaming strip (71), makes aramid fiber rope (72) deviate the central point of foaming strip (71) puts.

2. The tensile-type coiled cable of claim 1, wherein the aramid fiber cord (72) comprises aramid tows (722) and steel wires (721), the steel wires (721) being stranded with the aramid tows (722), the steel wires (721) being centered on a plurality of the aramid tows (722).

3. A tensile coiled cable according to claim 1, wherein the outer wall of the inner sheath (5) is provided with a first semi-circular groove corresponding to the number of tensile cords (7), and the inner wall of the outer sheath (6) is provided with a second semi-circular groove corresponding to the number of tensile cords (7), such that when the first and second semi-circular grooves are mated, a circular hole structure is formed for accommodating the tensile cords (7).

4. Tensile coiled cable according to claim 1, wherein the ratio of the thickness of the inner sheath (5) to the outer sheath (6) is 4:6 or 3:7.

5. the tensile coiled cable of claim 1, wherein the inner sheath (5) is an irradiation crosslinked polyethylene insulation layer and the outer sheath (6) is an irradiation crosslinked halogen-free low-smoke flame-retardant polyolefin insulation layer.

6. The tension-type coiled cable according to any one of claims 1-5, wherein the foam tape (71) is a polyethylene foam tape.

7. The tension-type coiled cable according to claim 6, wherein the diameter of the polyethylene foam strip is the same as the thickness of the inner sheath (5).

8. The tensile coiled cable of claim 1, wherein the wrapping layer (4) comprises a polyester tape wrapping layer, the number of wrapping layers of the polyester tape wrapping layer is two, and the wrapping coverage rate is 45%.

9. The tensile coiled cable of claim 1, wherein the signal wire core (2) comprises a stranded oxygen-free copper conductor (21), a semiconductive insulation shield layer (22) extruded on the outer wall of the oxygen-free copper conductor (21), and an insulation layer (23) extruded on the outer wall of the semiconductive insulation shield layer (22).

10. The tension-type coiled cable according to claim 1, wherein the filler layer (3) is a flame-retardant fiberglass filler layer.