CN213904991U

CN213904991U - Distortion-resistant cable

Info

Publication number: CN213904991U
Application number: CN202023204044.6U
Authority: CN
Inventors: 杜力永; 路亮; 杨涛
Original assignee: Hubei Shangde Jinli Wire And Cable Co ltd
Current assignee: Hubei Shangde Jinli Wire And Cable Co ltd
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2021-08-06
Anticipated expiration: 2030-12-26

Abstract

The utility model belongs to the technical field of the cable and specifically relates to a resistant distortion cable is related to, it includes a plurality of cable cores, middle sheath and oversheath, all from interior to exterior inner sheath and the load sheath have set gradually in week side of a plurality of cable cores, be provided with the buffering subassembly between inner sheath and the load sheath, middle sheath sets up in week side of a plurality of load sheaths, be provided with the filling layer between a plurality of load sheaths and the middle sheath, the oversheath sets up in the periphery side of middle sheath, be provided with a plurality of elasticity strips between oversheath and the middle sheath, the tangible chamber of changing is seted up to the elasticity strip, the elasticity strip runs through the gas pocket of seting up a plurality of and the chamber of changing intercommunication. This application has the effect that improves the antitorque distortion performance of cable through the elastic deformation power buffering distortion power of elasticity strip, is favorable to preventing the cable fracture, improves the life of cable.

Description

Distortion-resistant cable

Technical Field

The application relates to the field of cables, in particular to a torsion-resistant cable.

Background

With the rapid growth of national economy, particularly the pace of rural and urban power grid construction and transformation, the electric power industry in China is rapidly developed, and the development of the electrical industry matched with the electric power industry, particularly the electric wire and cable industry, is promoted. The development of the variety of the electric wire and cable shows a diversified trend, and the electric wire and cable has been developed from simple power transmission to multi-functionalization, i.e. new characteristics are respectively added according to different purposes, such as: flame retardant cables, fire resistant cables, low halogen low smoke cables, halogen free low smoke cables, twist resistant cables, and the like.

Now, a Chinese patent with the publication number of CN210443323U is searched, and the cable comprises an outer protective sleeve and copper core groups arranged in the outer protective sleeve, wherein the copper core groups are provided with four groups, the four groups of copper core groups are distributed around the axis of the outer protective sleeve, the copper core groups are wrapped with insulating skins, and the outer surfaces of the insulating skins are provided with flame-retardant adhesive layers; the outer protective sleeve is sequentially provided with an outer surface layer, a tensile layer and a flame-retardant coating with a flame-retardant effect, wherein the outer surface layer and the tensile layer are made of plastic low-smoke halogen-free flame-retardant fuel, and the outer protective sleeve is also internally provided with a separator for separating the copper core groups.

In view of the above-mentioned related technologies, the inventor believes that the fire resistance of the cable is increased by the fire-retardant glue layer and the fire-retardant coating layer, but the cable is easily affected by twisting force during use, so that the cable core inside the cable is easily crushed and cracked, and the service life of the cable is shortened.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the cable is weak in twisting resistance, the application provides a twisting-resistant cable.

The application provides a resistant distortion cable adopts following technical scheme:

the utility model provides a warp-resistant cable, includes a plurality of cable cores, middle sheath and oversheath, and is a plurality of week side of cable core all from interior to exterior has set gradually inner sheath and load sheath, the inner sheath with be provided with the buffering subassembly between the load sheath, middle sheath sets up in a plurality of week side of load sheath is a plurality of the load sheath with be provided with the filling layer between the middle sheath, the oversheath set in the week side of middle sheath, the oversheath with be provided with a plurality of elastic strips between the middle sheath, the elastic strip is seted up tangible variable chamber, the elastic strip run through seted up a plurality ofly with the gas pocket of variable chamber intercommunication.

By adopting the technical scheme, the filling layer is favorable for filling gaps among the four bearing sheaths, the roundness of the cable is ensured, the position of the cable core is more stable, and the stability of the cable is improved; when the oversheath received the distortion power, utilize deformation chamber and gas pocket to be favorable to the elastic strip to take place deformation and reset to elastic deformation power buffering distortion power through the elastic strip, when the load sheath received the distortion power, utilize the buffering subassembly to be favorable to buffering the distortion power that the inner sheath received, thereby reduce the influence of distortion power to the inner sheath, prevent cable core distortion fracture, realize the effect that improves the antitorque performance of cable, be favorable to preventing the cable fracture, improve the life of cable.

Preferably, the elastic strip is fixedly connected with two reinforcing strips in the deformation cavity.

Through adopting above-mentioned technical scheme, when deformation chamber takes place to deform, two enhancement strips prevent the deformation in deformation chamber to offset partial distortion power, realize improving the effect of the antitorque ability of cable.

Preferably, the two reinforcing strips are arc-shaped, and the middle bulges of the two reinforcing strips are mutually abutted.

Through adopting above-mentioned technical scheme, when deformation chamber takes place to deform, the mutual extrusion of middle protruding department of two enhancement strips, the enhancement strip is more even for the arc atress when being favorable to two enhancement strips to extrude each other, is favorable to improving the buffering effect of elasticity strip.

Preferably, the elastic strip and the deformation cavity are both elliptical, and two ends of the short side of the elastic strip are respectively fixedly connected with the outer sheath and the middle sheath.

Through adopting above-mentioned technical scheme, the elastic strip is the coverage area that the ellipse is favorable to improving the elastic strip, and the both ends of the minor face of elastic strip are fixed with oversheath and middle sheath respectively, are favorable to reducing the diameter of cable, are favorable to save material, reduction in production cost.

Preferably, the buffering component comprises a plurality of buffering strips, each buffering strip is arc-shaped, two ends of each buffering strip are fixedly connected with the inner sheath, and the top end of the arc surface of each buffering strip is abutted to the bearing sheath.

By adopting the technical scheme, when the bearing sheath bears the twisting force, the bearing sheath extrudes the buffer strip, the buffer strip is arc-shaped, so that the stress is more uniform, and the twisting force borne by the inner sheath is buffered by utilizing the elastic deformation force of the buffer strip; the buffer strip is abutted to the bearing sheath, so that the buffer strip is prevented from being distorted and deformed along with the bearing sheath, the influence of distortion force on the inner sheath is reduced, and the cable core is prevented from being distorted and broken.

Preferably, a limiting layer is arranged on the periphery of the bearing sheaths, and the periphery of the limiting layer is abutted against the middle sheath.

Through adopting above-mentioned technical scheme, utilize spacing layer around the week side of wrapping in load sheath, filling layer and parting bead, be favorable to making the cable core position more stable, improve the steadiness of cable, and be convenient for follow-up cladding middle sheath.

Preferably, the cable core is formed by the transposition of many copper lines, many the week side of copper line has the mica tape around the package.

Through adopting above-mentioned technical scheme, the mica tape has good high temperature resistance, fire resistance and good compliance, and the mica tape is favorable to preventing that the cable core is loose around the week side of package and cable core, is favorable to the inner sheath to be connected more firmly with the cable core.

Preferably, the outer sheath is a polyethylene layer added with mica powder and elastic ceramic ultrafine powder.

By adopting the technical scheme, the polyethylene has the characteristics of small relative density, good chemical resistance and water resistance, high mechanical strength and good electrical insulation, and the outer sheath is a polyethylene layer, so that the flame retardant property of the cable is favorably improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the outer sheath is subjected to a twisting force, the deformation cavity and the air holes are beneficial to deformation and reset of the elastic strip, so that the twisting force is buffered through the elastic deformation force of the elastic strip, the effect of improving the anti-twisting performance of the cable is realized, the cable is prevented from being broken, and the service life of the cable is prolonged;

2. when the bearing sheath is subjected to twisting force, the bearing sheath extrudes the arc-shaped buffer strip, the elastic deformation force of the buffer strip is utilized to buffer the twisting force applied to the inner sheath, and meanwhile, the buffer strip is abutted against the bearing sheath, so that the buffer strip is prevented from being twisted and deformed along with the bearing sheath, the influence of the twisting force on the inner sheath is reduced, the cable core is prevented from being twisted and broken, and the twisting resistance of the cable core is improved;

3. utilize spacing layer around the week side of wrapping in load sheath, filling layer and parting bead, be favorable to making the cable core position more stable, improve the steadiness of cable, spacing layer is aramid yarn, has the performance that rupture strength is high and fracture elongation is low, is favorable to improving the antitorque effect of cable core.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Reference numerals: 1. a cable core; 2. a middle sheath; 3. an outer sheath; 4. mica tapes; 5. an inner sheath; 6. a force bearing sheath; 7. an elastic strip; 8. a deformation chamber; 9. air holes; 10. a reinforcing strip; 11. a buffer strip; 12. a filling layer; 13. a limiting layer; 14. a dividing strip.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses resistant distortion cable.

Referring to fig. 1, a warp-resistant cable, includes four cable cores 1, middle sheath 2 and oversheath 3, and cable core 1 is formed by seven copper wires transposition, and seven copper wires week side has the mica tape 4 around the package, and week side of every cable core 1 all has set gradually inner sheath 5 and load sheath 6 from inside to outside, and inner sheath 5 cladding is in the week side of mica tape 4, and middle sheath 2 sets up in four load sheath 6 week sides. The inner peripheral side of the middle sheath 2 is fixedly connected with a cross-shaped separating strip 14, the four cable cores 1 are mutually separated by the separating strip 14, and the cable cores 1 are fixedly connected with the separating strip 14. The inner sheath 5, the separating strips 14 and the middle sheath 2 are made of halogen-free flame-retardant polyethylene materials. The outer sheath 3 is positioned on the periphery of the middle sheath 2, and the outer sheath 3 is a polyethylene layer added with mica powder and elastic ceramic ultrafine powder.

Mica tape 4 has good high temperature resistance, fire resistance and good compliance, and mica tape 4 is favorable to preventing that cable core 1 is loose around the week side of package and cable core 1, is favorable to inner sheath 5 to be connected more firmly with cable core 1. The division bars 14 are used for facilitating the division fixation of the four cable cores 1, the mutual influence among the four cable cores 1 is reduced, the inner sheath 5, the bearing sheath 6, the division bars 14 and the middle sheath 2 have the fireproof insulation effect, the fire resistance of the single cable core 1 is improved, and the outer sheath 3 is used for improving the fire resistance of the cable.

Referring to fig. 1, in order to improve the distortion resistance of the cable, a plurality of elastic strips 7 are arranged between the outer sheath 3 and the middle sheath 2, the plurality of elastic strips 7 are arranged along the circumference of the middle sheath 2 at equal intervals, the elastic strips 7 are provided with variable cavities 8, the elastic strips 7 and the variable cavities 8 are both elliptical, and two ends of the short edge of each elastic strip 7 are respectively fixedly connected with the outer sheath 3 and the middle sheath 2. The elastic strip 7 is provided with a plurality of air holes 9 communicated with the deformation cavity 8 at two ends of the long edge of the elliptic section. Elastic strip 7 strengthens strip 10 in deformation chamber 8 two fixedly connected with, and two are strengthened strip 10 and are the arc, and two mutual butts of the middle protruding department of strengthening strip 10, strengthen the both ends of strip 10 all with elastic strip 7 fixed connection. The elastic strip 7 and the reinforcing strip 10 are both made of silicon rubber materials added with anti-aging agent and mica powder.

When the outer sheath 3 is subjected to a twisting force, the deformation cavity 8 and the air hole 9 are beneficial to the deformation and the reset of the elastic strip 7, so that the twisting force is buffered through the elastic deformation force of the elastic strip 7; when deformation chamber 8 takes place to warp, the mutual extrusion of the middle protruding department of two enhancement strips 10 stops deformation chamber 8's deformation, and enhancement strip 10 is favorable to the atress more even for the arc, improves the buffering effect of elasticity strip 7 to offset some distortion power, realize improving the effect of the anti distortion performance of cable, be favorable to preventing the cable fracture, improve the life of cable.

Referring to fig. 1, for improving the antitorque performance of cable core 1, be provided with the buffering subassembly between inner sheath 5 and the load sheath 6, the buffering subassembly includes a plurality of buffering strips 11, and buffering strip 11 is the arc, and the both ends of buffering strip 11 all with inner sheath 5 fixed connection, the top and the 6 butt of load sheath of the cambered surface of buffering strip 11, the mutual fixed connection of end department of two adjacent buffering strips 11. The buffer strip 11 and the bearing sheath 6 are both made of silicon rubber materials added with anti-aging agent and mica powder, so that the buffer strip 11 and the bearing sheath 6 have elasticity, are flame-retardant and fireproof, and have prolonged service life.

When the bearing sheath 6 is stressed by a twisting force, the bearing sheath 6 extrudes the arc-shaped buffer strip 11, the buffer strip 11 is arc-shaped, so that the stress is more uniform, and the twisting force applied to the inner sheath 5 is buffered by using the elastic deformation force of the buffer strip 11; two adjacent buffer strips 11 are fixed with each other, so that the stress of the plurality of buffer strips 11 is favorably dispersed, and the overall buffer effect of the plurality of buffer strips 11 is improved;

buffer strip

11 and 6 butts of bearing sheath are favorable to preventing that buffer strip 11 from following 6 distortion deformations of bearing sheath to reduce the influence of distortion power to inner sheath 5, prevent that cable core 1 from distorting the fracture, improve cable core 1's antitorque song performance.

Referring to fig. 1, for four strength bearing sheaths 6 and middle sheath 2 are fixed firm, be provided with filling layer 12 between four strength bearing sheaths 6 and the middle sheath 2, filling layer 12 adopts the PP rope among the prior art, and four strength bearing sheaths 6's week side is around having spacing layer 13, and spacing layer 13 adopts aramid yarn to wind around covering and forms, and spacing layer 13's periphery side and middle sheath 2 butt.

Be favorable to filling the gap between four load sheath 6 through filling layer 12, ensure the circularity of cable, utilize spacing layer 13 around the week side of wrapping in load sheath 6, filling layer 12 and parting bead 14, be favorable to making cable core 1 position more stable, improve the steadiness of cable, and the sheath 2 in the middle of the follow-up cladding of being convenient for. And the aramid yarn has the performances of high breaking strength and low breaking elongation, and is favorable for improving the anti-twisting effect of the cable core 1.

The implementation principle of the embodiment of the application is as follows:

when the outer sheath 3 receives the twisting force, the elastic strip 7 deforms, the two reinforcing strips 10 extrude each other to prevent the deformation of the deformation cavity 8, the deformation cavity 8 and the air hole 9 reset by using the elastic strip 7, and the twisting force is buffered by the elastic deformation force of the elastic strip 7 and the reinforcing strips 10. Utilize the distortion power that the inner sheath 5 received of elastic deformation power buffering of buffering strip 11, through two adjacent buffering strips 11 reciprocal anchorages for a plurality of buffering strips 11's atress is more even, thereby reduces the influence of distortion power to inner sheath 5, realizes improving the effect of the anti distortion performance of cable.

The flame-retardant and fire-resistant performance of the cable core 1 is improved by the mica tape 4, the inner sheath 5 is connected with the cable core 1 more stably, and the four cable cores 1 are partitioned and fixed by the separating strips 14. The inner sheath 5, the bearing sheath 6, the separating strips 14 and the middle sheath 2 have fireproof and insulating effects, and the fire resistance of the single cable core 1 is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A twist-resistant cable characterized by: comprises a plurality of cable cores (1), a middle sheath (2) and an outer sheath (3), wherein the peripheral sides of the cable cores (1) are sequentially provided with an inner sheath (5) and a bearing sheath (6) from inside to outside, a buffer component is arranged between the inner sheath (5) and the bearing sheath (6), the middle protective sleeve (2) is arranged on the periphery of the bearing protective sleeves (6), a filling layer (12) is arranged between the bearing protective sleeves (6) and the middle protective sleeve (2), the outer sheath (3) is arranged on the periphery of the middle sheath (2), a plurality of elastic strips (7) are arranged between the outer sheath (3) and the middle sheath (2), the elastic strip (7) is provided with a deformation cavity (8), and the elastic strip (7) penetrates through the deformation cavity (8) to be provided with a plurality of air holes (9) communicated with the deformation cavity (8).

2. A twist-resistant cable as claimed in claim 1, wherein: the elastic strip (7) is fixedly connected with two reinforcing strips (10) in the deformation cavity (8).

3. A twist-resistant cable as claimed in claim 2, wherein: the two reinforcing strips (10) are arc-shaped, and the middle bulges of the two reinforcing strips (10) are mutually abutted.

4. A twist-resistant cable as claimed in claim 1, wherein: the elastic strip (7) and the deformation cavity (8) are both oval, and two ends of the short side of the elastic strip (7) are fixedly connected with the outer sheath (3) and the middle sheath (2) respectively.

5. A twist-resistant cable as claimed in claim 1, wherein: the buffer assembly comprises a plurality of buffer strips (11), the buffer strips (11) are arc-shaped, two ends of each buffer strip (11) are fixedly connected with the inner sheath (5), and the top end of the cambered surface of each buffer strip (11) is abutted to the bearing sheath (6).

6. A twist-resistant cable as claimed in claim 1, wherein: and a limiting layer (13) is arranged on the peripheral side of the bearing sheaths (6), and the peripheral side of the limiting layer (13) is abutted against the middle sheath (2).

7. A twist-resistant cable as claimed in claim 1, wherein: cable core (1) is formed by many copper lines transposition, many the week side of copper line has mica tape (4) around the package.

8. A twist-resistant cable as claimed in claim 1, wherein: the outer sheath (3) is a polyethylene layer added with mica powder and elastic ceramic ultrafine powder.