CN110706852A

CN110706852A - Wear-resistant trailing cable and preparation method thereof

Info

Publication number: CN110706852A
Application number: CN201910701910.5A
Authority: CN
Inventors: 李华斌; 何杰; 胡湘华; 马辽林; 肖本峰; 易智敏; 熊硕
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-01-17

Abstract

The invention discloses an anti-abrasion trailing cable and a preparation method thereof, wherein the cable comprises a first damping buffer layer, the first damping buffer layer is arranged in the middle of the cable, and the first damping buffer layer is provided with a plurality of first arc-shaped mounting surfaces; the plurality of conductive cable cores are annularly arranged around the first damping buffer layer and are correspondingly attached to the plurality of first arc-shaped mounting surfaces one by one; the plurality of shock absorbing pieces and the ground wire cable cores are correspondingly arranged between any two adjacent conductive cable cores one by one; the water blocking tape is wound on the outer peripheral walls of the plurality of cable conducting cores, the plurality of shock absorbing pieces and the ground wire cable core; the first inner sheath is a high-strength rubber part and is abutted against the outer peripheral wall of the water-blocking tape; the first woven fiber layer is tightly attached to the outer side of the first inner sheath; the second inner sheath is a high-strength rubber part and is abutted against the outer side of the first woven fiber layer; the second woven fiber layer is tightly attached to the outer side of the second inner sheath, and the abrasion-resistant trailing cable is reliable in structure, good in damping effect and not prone to bulging.

Description

Wear-resistant trailing cable and preparation method thereof

Technical Field

The invention relates to the technical field of power cables, in particular to an abrasion-resistant trailing cable and a preparation method thereof.

Background

Cables in the related art often face frequent dragging, twisting and scraping in some use environments such as mines and mines, and are also easily rolled directly by engineering trucks and the like, so that the problems of breakage, twisting deformation, electric leakage and the like easily occur.

CN205303021U discloses an anti warp stand wear and tear cable shocks resistance, this cable is through setting up the rubber packing strip in inside in order to realize the shock attenuation, the effect of reducing wear, simultaneously, adopt the first inner sheath of first layer, the first fibrous layer of weaving of stranded aramid yarn, the first inner sheath of second floor and the protection of polyether type TPU layer realization to inside cable sub-part, but only adopt the rubber packing strip to realize once the shock attenuation in this scheme, and when the cable atress under the condition of rolling is too big, it is unsatisfactory only by rubber packing strip shock attenuation effect, in addition, the inside TPU layer of cable combines not inseparable with the rubber layer, bulge easily during the bending.

CN 205303036U discloses a multifunctional trailing cable, which also has the problems of non-ideal damping effect, large outer diameter and poor bending performance.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to propose a wear-resistant trailing cable which is structurally reliable, resistant to wear, has a good damping effect and is not prone to bulging.

The invention also provides a cable preparation method for preparing the cable.

The cable comprises a first shock absorption buffer layer, wherein the first shock absorption buffer layer is arranged in the middle of the cable and provided with a plurality of first arc-shaped mounting surfaces; the plurality of conductive cable cores are annularly arranged around the first damping buffer layer and are correspondingly attached to the plurality of first arc-shaped mounting surfaces one by one, and each conductive cable core is tangent to the adjacent conductive cable core; the damping pieces and the ground wire cable cores are arranged between any two adjacent cable guiding cores in a one-to-one correspondence mode, each damping piece is tangent to the adjacent cable guiding core, and the ground wire cable core is tangent to the adjacent cable guiding core; the water blocking tape is wound and wrapped on the outer peripheral walls of the plurality of cable guiding cores, the plurality of shock absorbing pieces and the ground wire cable core; the first inner sheath is a high-strength rubber piece and is abutted against the outer peripheral wall of the water blocking tape; the first woven fiber layer is tightly attached to the outer side of the first inner sheath; the second inner sheath is a high-strength rubber piece and is abutted against the outer side of the first woven fiber layer; the second woven fiber layer is tightly attached to the outer side of the second inner sheath; the outer sheath is made of thermoplastic materials and is tightly covered on the outer side of the first woven fiber layer.

According to the cable provided by the embodiment of the invention, by adopting the first damping buffer layer and utilizing the damping effect of the first damping buffer layer, the stress of the cable in the dragging and rolling processes can be buffered, the internal abrasion of the cable is reduced, and meanwhile, secondary damping can be realized by the damping strip arranged between the conductive cable core and the ground wire cable core, so that double buffering is realized by the first damping buffer layer and the damping strip, the stress is further buffered, the friction damage between the conductive cable core and the ground wire cable core is reduced, the structural reliability of the cable is improved, and the service life is prolonged.

In addition, compare in the prior art and adopt the first inner sheath of first layer, the first fibrous layer of weaving of stranded aramid yarn, the first inner sheath of second floor and the first technical scheme of weaving the protection of inside cable sub-spare of polyether TPU layer, through setting up first fibrous layer of weaving and the fibrous layer of second weaving, can weave the interlude of fibrous layer between first inner sheath and second inner sheath and the interlude of the fibrous layer between second inner sheath and oversheath through first weaving fibrous layer, make between first inner sheath and the second inner sheath, combine closely between second inner sheath and the oversheath, produce the separation when avoiding crooked and cause the cable surface to rise to drum.

According to some embodiments of the invention, the cable further includes a second buffer layer, the second buffer layer is disposed between the ground wire cable core and the adjacent cable guiding cores, the second buffer layer is provided with a plurality of second arc-shaped mounting surfaces, and the ground wire cable core and the adjacent cable guiding cores are correspondingly attached to the plurality of second arc-shaped mounting surfaces one to one.

According to some examples of the invention, the first and second shock absorbing buffers each extend in an axial direction of the cable and an axis of the first shock absorbing buffer is collinear with an axis of the outer sheath.

According to some examples of the invention, the first shock absorbing buffer layer is a hollow structure, each first arc-shaped installation surface is inwards concave towards the center of the first shock absorbing buffer layer to form a first arc-shaped installation groove, and each first arc-shaped installation groove is matched with the shape of the outer peripheral wall of the cable guide core corresponding to the first arc-shaped installation groove so that the cable guide core is abutted in the first arc-shaped installation groove; or second shock attenuation buffer layer is hollow structure, every the second arc mounting groove towards the second shock attenuation buffer layer's center is interior to form second arc mounting groove, every the second arc mounting groove all with rather than corresponding lead the cable core and the shape of the periphery wall of ground wire cable core is adapted to so that lead the cable core and the laminating of ground wire cable core is supported and is located in the second arc mounting groove.

According to some examples of the invention, the first and second shock absorbing buffers are hermetically sealed and filled with a gas.

According to some examples of the invention, the first and second shock absorbing buffer layers are high-strength rubber or high-strength silica gel, the first woven fiber layer is woven by a plurality of aramid filaments, and the outer sheath is a polyether type TPU layer or a TPEE material layer.

According to some examples of the invention, the cable core comprises: the multi-strand conductive wire core comprises a strand positioned in the center and other strands which are arranged in a multi-layer mode from inside to outside along the radial direction of the conductive wire core and form a ring shape in each layer, wherein the cabling directions of the conductive wire cores of the adjacent layers in the other strands are opposite; the conductive wire core shielding layer is coated on the outer sides of the stranded conductive wire cores; the insulating layer, the insulating layer around wrap in the outside of conductive core shielding layer.

According to some examples of the present invention, the plurality of the conductive cores are 19 cores arranged in three layers, wherein 1 core is located at the center of the conductive core, 6 cores are spirally wound on the outer circumference side of the central core to form a secondary outer layer, and the rest of the conductive cores are spirally wound on the outer side of the secondary outer layer.

According to some examples of the invention, the shock absorbing member is a rubber strip and the number of the rubber strip is two, the number of the cable cores is three, the three cable cores, the two rubber strips and the one ground cable core are integrally twisted to form a cable, and the total twisted cable pitch is 6-8 times of the outer diameter of the cable.

The cable preparation method comprises the steps of S10, preparing a cable core, wherein the center of the cable core adopts one conductive wire core, the secondary outer layer adopts 6 conductive wire cores and is spirally wound on the outer peripheral side of the center in the right direction, the third layer adopts 12 conductive cable cores and is spirally wound on the outer side of the secondary outer layer in the left direction, the cabling directions of the conductive wire cores of the adjacent layers are opposite, wherein the conductive wire core insulating layers and the shielding layers are sequentially arranged on the outer sides of the multiple conductive wire cores in an overlapping and winding mode, the overlapping rate is 45% -55%, and the cable core is obtained; s20, arranging the first damping buffer layer in the middle of the plurality of conductive cable cores, enabling the plurality of conductive cable cores to be correspondingly attached to the plurality of first arc-shaped installation surfaces one by one, enabling each conductive cable core to be tangent to the adjacent conductive cable core, arranging the plurality of damping pieces and the ground wire cable cores between any two adjacent conductive cable cores one by one, integrally twisting the conductive cable cores, the damping pieces and the ground wire cable cores into a cable, and enabling the total twisting pitch to be 6-8 times of the outer diameter of the cable; s30, wrapping waterproof tapes with two insulated surfaces around the outer peripheral walls of the plurality of cable cores, the plurality of shock absorbing members and the ground wire cable core; s40, arranging a first inner sheath and a first woven fiber layer outside the water-blocking tape in sequence, and vulcanizing by adopting steam to enable the first inner sheath close to one side of the water-blocking tape to be embedded into a gap between the cable guiding core and the ground wire cable core and enable the gap between the first inner sheath and the first woven fiber layer to be closely adhered, so that the first inner sheath and the first woven fiber layer are prepared; s50, arranging a second inner sheath and a second woven fiber layer outside the first woven fiber layer in sequence, vulcanizing by adopting steam, and tightly adhering two sides of the second inner sheath with gaps of the first woven fiber layer and the second woven fiber layer respectively to finish the preparation of the second inner sheath and the second woven fiber layer; and S60, covering an outer sheath outside the second woven fiber layer.

According to the cable preparation method provided by the embodiment of the invention, the preparation process is simple and easy to realize, and the prepared cable is reliable in structure, wear-resistant and good in damping effect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

The beneficial technical effects of the invention are as follows:

1. by adopting the first damping buffer layer and the second damping buffer layer and utilizing the damping effect of the damping buffer layers, the stress of the cable in the dragging and rolling processes can be buffered, the internal abrasion of the cable is reduced, meanwhile, secondary damping can be realized through the damping strips arranged between the conductive cable core and the ground wire cable core, so that triple buffering is realized through the first damping buffer layer, the second damping buffer layer and the damping strips, the stress is further buffered, the friction damage between the first damping buffer layer and the second damping buffer layer is reduced, the structural reliability of the cable is improved, and the service life is prolonged;

2. compared with the technical scheme that the protection of the internal cable sub-components is realized by adopting the first layer of the first inner sheath, the first woven fiber layer of the plurality of aramid filaments, the second layer of the first inner sheath and the polyether TPU layer or the TPEE material layer in the related technology, the high-strength rubber first inner sheath, the first woven fiber layer and the outer sheath structure are arranged, so that the protection of the internal cable guiding core is ensured, the integral outer diameter of the cable is reduced, and the bending performance is improved;

3. the first damping buffer layer and the second damping buffer layer are arranged to be hollow inflatable structures, so that the stress can be buffered by utilizing the increase of pressure intensity after the gas in the first damping buffer layer and the second damping buffer layer is stressed, the damping and rolling resistant effects are improved, meanwhile, the whole weight of the cable can be reduced by adopting the hollow inflatable structures, and the cable is convenient to pull;

4. the stranded conductive wire cores in the conductive cable core are arranged into a multilayer structure, and the cabling directions of the conductive wire cores of adjacent layers are opposite, so that the anti-twisting performance of the conductive cable core is further improved by utilizing a cabling mode;

5. the ratio of the total stranding cable pitch to the stranding outer diameter of the cable is reasonably set, so that the poor twisting performance of the cable with the excessively small total stranding cable pitch can be avoided, the poor bending performance of the cable with the excessively large total stranding cable pitch can also be avoided, and the overall anti-twisting performance and the comprehensive anti-bending performance of the whole cable can be ensured.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a wear-resistant trailing cable according to an embodiment of the present invention.

Reference numerals:

an abrasion resistant trailing cable 100;

a shock-absorbing bar 10;

a cable core 20; a conductive wire core 21; a conductive core shielding layer 22; an insulating layer 23;

a ground wire cable core 30;

a first woven fiber layer 40; a first inner sheath 50; an outer sheath 60;

a first cushion layer 71; a second shock absorbing buffer layer 72;

a second inner sheath 80; a second woven fabric layer 90.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The abrasion-resistant trailing cable 100 according to the embodiment of the first aspect of the present invention is described below with reference to the drawings.

Referring to fig. 1, the abrasion-resistant trailing cable 100 according to the embodiment of the present invention includes a first shock absorbing buffer layer 71, a plurality of cable cores 20, a plurality of shock absorbing members and one ground cable core 30, a water blocking tape, a first inner sheath 50, a first braided fiber layer 40 and an outer sheath 60.

The first cushion layer 71 is provided in the middle of the wear-resistant trailing cable 100, and the first cushion layer 71 is provided with a plurality of first arc-shaped mounting surfaces adapted to the shape of the outer peripheral wall of the conductive cable core 20. The plurality of conductive cable cores 20 are annularly arranged around the first shock absorption buffer layer 71, the plurality of conductive cable cores 20 are correspondingly attached to and abutted against the corresponding first arc-shaped mounting surface one by one, and meanwhile, each conductive cable core 20 is tangent to the conductive cable core 20 adjacent to the conductive cable core 20.

A plurality of shock absorbing members and a ground wire cable core 30 are correspondingly disposed between any two adjacent conductive cable cores 20, for example, as shown in fig. 1, three conductive cable cores 20 may be provided, two shock absorbing members are provided, the three conductive cable cores 20 are sequentially tangent and annularly arranged to form three gaps, two shock absorbing members are disposed in the gaps formed by the outer peripheral walls of any two conductive cable cores 20 and are tangent to the outer peripheral walls of the two conductive cable cores 20 adjacent to the shock absorbing members, respectively, the ground wire cable core 30 is disposed in the remaining gaps and is tangent to the outer peripheral walls of the two conductive cable cores 20 adjacent to the ground wire cable core 30, so that the overall structure of the conductive cable cores 20, the first shock absorbing buffer layer 71, the shock absorbing members and the ground wire cable core 30 is more compact, thereby reducing the space occupation of the entire wear-resistant trailing cable 100, and on the other hand, the shock absorbing between the plurality of conductive cable cores 20 can be realized by the first shock absorbing, meanwhile, secondary buffering and shock absorption can be realized through the shock absorption strip 10 arranged in the gap, so that a dual shock absorption effect is achieved, and the shock absorption strip 10 and the first shock absorption buffer layer 71 are positioned between the cable conducting core 20 and the ground wire cable core 30, so that friction between the cable conducting core 20 and the ground wire cable core 30 caused by compression can be reduced, and internal abrasion is further reduced.

The water blocking tape is arranged on the outer peripheral walls of the plurality of cable cores 20, the plurality of shock absorbing members and the ground wire cable core 30, so that the water blocking effect can be achieved, and meanwhile, the overall structures of the plurality of cable cores 20, the plurality of shock absorbing members, the ground wire cable core 30 and the first shock absorbing buffer layer 71 are more compact, and the gap space is further reduced.

Further, the outer peripheral wall of the water blocking tape is sequentially provided with a first inner sheath 50, a first woven fiber layer 40, a second inner sheath 80, a second woven fiber layer 90 and an outer sheath 60, the outer sheath 60 is made of thermoplastic materials, the first inner sheath 50 and the second inner sheath 80 are high-strength rubber pieces, for example, the first inner sheath 50 and the second inner sheath 80 can be rubber pieces with strength larger than 16MPa, so that the overall strength of the anti-wear trailing cable 100 is further improved, and the wear resistance is further improved.

Therefore, according to the anti-wear trailing cable 100 provided by the embodiment of the invention, by adopting the first shock absorption buffer layer 71 and utilizing the shock absorption effect of the first shock absorption buffer layer 71, the stress of the anti-wear trailing cable 100 in the process of being dragged and rolled can be buffered, the internal wear of the anti-wear trailing cable 100 can be reduced, meanwhile, the secondary shock absorption can be realized through the shock absorption strip 10 arranged between the conductive cable core 20 and the ground cable core 30, so that the double buffering is realized through the first shock absorption buffer layer 71 and the shock absorption strip 10, the stress is further buffered, the friction damage between the first shock absorption buffer layer 71 and the shock absorption strip 10 is reduced, the structural reliability of the anti-wear trailing cable 100 is improved. In addition, compare in the technical scheme that adopts first layer inner sheath, the stratum reticulare is are woven to the stranded aramid fiber silk, the protection to inside cable sub-assembly is realized to second inner sheath and polyether TPU layer in the correlation technique, through setting up first woven fiber layer 40 and second woven fiber layer 90, can weave the interlude of fiber layer 90 between second inner sheath 80 and the interlude of first woven fiber layer 40 between first inner sheath 50 and second inner sheath 80 through setting up for between first inner sheath 50 and second inner sheath 80, combine closely between second inner sheath 80 and the oversheath 60, produce the separation and cause the cable surface to rise when avoiding crooked.

Referring to fig. 1, in some embodiments of the present invention, in order to further reduce the abrasion of the ground cable core 30 and the conductive cable core 20 caused by the stress applied to each other and improve the shock-absorbing performance of the entire abrasion-resistant trailing cable 100, the abrasion-resistant trailing cable 100 is further provided with a second shock-absorbing buffer layer 72, the second shock-absorbing buffer layer 72 is provided in a gap formed by the ground cable core 30 and the conductive cable core 20 adjacent to the ground cable core 30, and the second shock-absorbing buffer layer is provided with a plurality of second arc-shaped mounting surfaces, on which the ground cable core 30 and the conductive cable core 20 adjacent to the ground cable core 30 are abutted in one-to-one correspondence, for example, in the example shown in fig. 1, the second shock-absorbing buffer layer 72 is formed in a substantially triangular shape in cross section, having three second arc-shaped mounting surfaces respectively adapted to the shapes of the corresponding conductive cable core 20 and the ground cable core 30, therefore, the conductive cable core 20 and the ground wire cable core 30 can be better attached to the second shock absorption buffer layer 72, and the shock absorption effect is improved.

In some examples of the invention, in order to guarantee the shock-absorbing, wear-reducing action of the first shock-absorbing buffer layer 71 and of the second shock-absorbing buffer layer 72, both the first shock-absorbing buffer layer 71 and the second shock-absorbing buffer layer 72 extend along the axial direction of the anti-fray trailing cable 100, and the axis of the first shock-absorbing buffer layer 71 is collinear with the axis of the outer sheath 60, so that the first shock-absorbing buffer layer 71 can be centred as much as possible, facilitating the equalization of the forces on the sides of the anti-fray trailing cable 100.

As shown in fig. 1, in some examples, the first shock absorbing buffer layer 71 may be a hollow structure, each first arc-shaped installation surface is recessed towards the center to form a first arc-shaped installation groove adapted to the outer shape of the conductive cable core 20, so that the portion of the conductive cable core 20 attached to the first arc-shaped installation surface is located in the first arc-shaped installation groove, thus further ensuring the matching between the first shock absorbing buffer layer 71 and the conductive cable core 20, improving the shock absorbing effect and reducing the abrasion of the first shock absorbing buffer layer 71, and further facilitating the assembly of the first shock absorbing buffer layer 71 and the conductive cable core 20 by forming the matching between the first arc-shaped installation groove and the conductive cable core 20, and reducing the difficulty in preparation.

Similarly, second shock attenuation buffer layer 72 can be hollow structure, thereby every second arc installation face inwards forms the second arc mounting groove with the appearance adaptation of the conductive cable core 20 and the ground wire cable core 30 that correspond to the center indent, thereby make the conductive cable core 20 that correspond, the part that ground wire cable core 30 and second arc installation face were laminated is located second arc mounting groove, can further guarantee second shock attenuation buffer layer 72 and conductive cable core 20 like this, the cooperation of ground wire cable core 30, improve the shock attenuation effect and the effect of reducing wear of second shock attenuation buffer layer 72, and, through forming second arc mounting groove and conductive cable core 20, the cooperation of ground wire cable core 30, also can make things convenient for the assembly of the two in preparation, reduce the preparation degree of difficulty.

In some examples, in order to improve the damping effect of the damping buffer layer, improve the strength and the structural stability of the damping buffer layer, the first damping buffer layer 71 and the second damping buffer layer 72 are both of a closed structure, and gas is filled in the first damping buffer layer 71 and the second damping buffer layer 72, so that the pressure increase is realized after the gas is stressed in the first damping buffer layer 71 and the second damping buffer layer 72 to buffer the stress, thereby improving the damping and rolling resistance effects, and in addition, by adopting a hollow inflation structure, the whole weight of the anti-wear trailing cable 100 can be reduced, and the trailing cable is convenient to drag.

In some examples, the first and second shock absorbing buffer layers 71 and 72 are made of high-strength rubber or high-strength silicone, the first woven fiber layer 40 is woven by a plurality of aramid filaments, and the outer sheath 60 is a polyether TPU layer, so that the overall weight can be reduced by selecting materials and the wear-resisting and shock-absorbing effects can be ensured.

Preferably, outer jacket 60 is a layer of TPEE material, thereby improving the abrasion and water resistance of cable 100 by utilizing the performance characteristics of the TPEE material.

Referring to fig. 1, in some embodiments of the present invention, the conductive cable core 20 is mainly composed of a plurality of conductive cores 21, a conductive core shielding layer 22 and an insulating layer 23, the plurality of conductive cores 21 are formed in a multi-layer structure, one conductive core 21 is located at the center, the remaining plurality of conductive cores are arranged in a ring shape around the center and in multiple layers from inside to outside in the radial direction, and the cabling directions of the conductive cores 21 of adjacent layers are opposite, so that the twisting resistance of the conductive cable core 20 is further improved by cabling.

In order to reduce the electromagnetic influence generated after the conduction between the conductive wire cores 21, the conductive wire core shielding layer 22 is wrapped outside the conductive wire cores 21, and in order to avoid the short circuit between the conductive wire cores 21, an insulating layer 23 is wrapped outside the conductive wire core shielding layer 22.

As shown in fig. 1, in some examples, the conductive core 21 has 19 strands, and forms a three-in-one arrangement from inside to outside, wherein 1 strand is located at the center of the conductive core 21, 6 strands are spirally wound around the central 1 strand of the conductive core 21 to the right to form a secondary outer layer, and the other 12 strands are spirally wound around the secondary outer layer to the left, so that the conductive core 20 can form better flexibility by continuously winding in the forward and reverse directions, thereby improving the anti-twisting performance and prolonging the service life.

Further, as shown in fig. 1, the shock absorbing member is formed as a rubber strip, and the shock absorbing strip 10 has two, the total number of the conductive cable cores 20 is three, the total number of the rubber strips is two, and the total cabling pitch is 6 to 8 times of the cabling outer diameter, for example, the total cabling pitch is 6 times, 7 times, or 8 times of the cabling outer diameter, so that it is possible to prevent the poor twisting performance of the anti-wear trailing cable 100 when the total cabling pitch is too small, and to prevent the poor bending performance of the anti-wear trailing cable 100 when the total cabling pitch is too large, thereby ensuring the anti-twisting performance and the anti-bending performance of the anti-.

A method of manufacturing a wear-resistant trailing cable according to an embodiment of the second aspect of the present invention is described below with reference to the accompanying drawings.

The preparation method of the abrasion-resistant trailing cable comprises the following steps:

first, preparation cable conductor core, one strand of conductive core is adopted at the center, the periphery side that is located the center is around locating to inferior skin adoption 6 strand of conductive core right-hand spirals, the third layer adopts 12 strand of conductive core left-hand spirals around locating inferior skin outside, wherein, the stranding opposite direction of the conductive core of adjacent layer arranges, wherein, adopt the overlapping in proper order in the stranded conductive core outside to arrange conductive core insulating layer and shielding layer around the package mode, the overlap ratio is 45% -55%, obtain the cable conductor core, and can guarantee insulating and shielding effect through setting up the overlap ratio, avoid appearing the electric leakage condition.

Secondly, arranging the first damping buffer layer in the middle of the plurality of conductive cable cores, enabling the plurality of conductive cable cores to be correspondingly attached to the plurality of first arc-shaped mounting surfaces one by one, enabling each conductive cable core to be tangent to the adjacent conductive cable core, correspondingly arranging the plurality of damping parts and the ground wire cable cores between any two adjacent conductive cable cores one by one, and integrally twisting the conductive cable cores, the damping parts and the ground wire cable cores into a cable, wherein the total stranding pitch is 6-8 times of the cabling outer diameter, for example, the total stranding pitch is 6 times, 7 times or 8 times of the cabling outer diameter, so that the poor twisting performance of the cable with the excessively small total stranding pitch can be avoided, the poor bending performance of the cable with the excessively large total stranding pitch can be avoided, and the overall twisting resistance and bending resistance of the cable can be further ensured;

thirdly, wrapping waterproof tapes with two insulated surfaces around the outer peripheral walls of the plurality of cable cores, the plurality of shock absorbing members and the ground wire cable core;

fourthly, an inner sheath and a woven net layer are sequentially arranged outside the water-blocking tape, and steam is adopted for vulcanization, so that the inner sheath close to one side of the water-blocking tape is embedded into a gap between the cable guiding core and the ground wire cable core, and the gap between the inner sheath and the woven net layer is tightly adhered, the preparation of the inner sheath and the woven net layer is completed, and the high-strength rubber inner sheath can be completely embedded into a gap formed by the outer peripheral walls of the cable guiding core and the ground wire cable core through steam vulcanization, so that the whole structure is more compact, the occupied space is reduced, and the high-strength rubber inner sheath can be used for realizing three-time buffering (namely high-strength inner sheath buffering, first damping buffer layer and second damping buffer layer buffering, and damping strip buffering);

fifthly, sequentially arranging a second inner sheath and a second woven fiber layer outside the first woven fiber layer, vulcanizing by adopting steam, and tightly adhering two sides of the second inner sheath with gaps of the first woven fiber layer and the second woven fiber layer respectively to finish the preparation of the second inner sheath and the second woven fiber layer;

and finally, covering an outer sheath outside the woven mesh layer to prepare the cable.

Therefore, the cable preparation method provided by the embodiment of the invention is simple in preparation process and easy to realize, and the prepared cable is reliable in structure, wear-resistant and good in damping effect.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

Other constructions, etc. and operations of cables and methods of making cables according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An abrasion resistant trailing cable, comprising:

the first shock absorption buffer layer is arranged in the middle of the cable and provided with a plurality of first arc-shaped mounting surfaces;

the plurality of conductive cable cores are annularly arranged around the first damping buffer layer and are correspondingly attached to the plurality of first arc-shaped mounting surfaces one by one, and each conductive cable core is tangent to the adjacent conductive cable core;

the damping pieces and the ground wire cable cores are arranged between any two adjacent cable guiding cores in a one-to-one correspondence mode, each damping piece is tangent to the adjacent cable guiding core, and the ground wire cable core is tangent to the adjacent cable guiding core;

the water blocking tape is wound and wrapped on the outer peripheral walls of the plurality of cable guiding cores, the plurality of shock absorbing pieces and the ground wire cable core;

the first inner sheath is a high-strength rubber piece and is abutted against the outer peripheral wall of the water blocking tape;

the first woven fiber layer is tightly attached to the outer side of the first inner sheath;

the second inner sheath is a high-strength rubber piece and is abutted against the outer side of the first woven fiber layer;

the second woven fiber layer is tightly attached to the outer side of the second inner sheath;

the outer sheath is made of thermoplastic materials and is tightly covered on the outer side of the first woven fiber layer.

2. The abrasion-resistant trailing cable of claim 1, further comprising a second shock absorbing buffer layer disposed between the ground cable core and the adjacent conductor core, the second shock absorbing buffer layer having a plurality of second arcuate mounting surfaces to which the ground cable core and the adjacent conductor core are attached in a one-to-one correspondence.

3. The abrasion-resistant trailing cable of claim 2, wherein the first and second shock absorbing buffers each extend in an axial direction of the cable and an axis of the first shock absorbing buffer is collinear with an axis of the outer jacket.

4. The abrasion-resistant trailing cable of claim 3, wherein the first cushion layer is a hollow structure, each first arcuate mounting groove is recessed inward toward a center of the first cushion layer to form a first arcuate mounting groove, each first arcuate mounting groove is adapted to a shape of an outer peripheral wall of the cable guide core corresponding thereto so that the cable guide core fits snugly against the first arcuate mounting groove;

or second shock attenuation buffer layer is hollow structure, every the second arc mounting groove towards the second shock attenuation buffer layer's center is interior to form second arc mounting groove, every the second arc mounting groove all with rather than corresponding lead the cable core and the shape of the periphery wall of ground wire cable core is adapted to so that lead the cable core and the laminating of ground wire cable core is supported and is located in the second arc mounting groove.

5. The abrasion-resistant trailing cable of claim 4, wherein the first and second shock absorbing buffers are hermetically sealed and filled with a gas.

6. The abrasion-resistant trailing cable of claim 4, wherein the first and second shock absorbing buffer layers are high strength rubber or silicone, the first braided fiber layer is braided from a plurality of aramid filaments, and the outer jacket is a layer of polyether TPU or TPEE material.

7. The abrasion-resistant trailing cable of claim 1, wherein the cable core comprises:

the multi-strand conductive wire core comprises a strand positioned in the center and other strands which are arranged in a multi-layer mode from inside to outside along the radial direction of the conductive wire core and form a ring shape in each layer, wherein the cabling directions of the conductive wire cores of the adjacent layers in the other strands are opposite;

the conductive wire core shielding layer is coated on the outer sides of the stranded conductive wire cores;

the insulating layer, the insulating layer around wrap in the outside of conductive core shielding layer.

8. The abrasion-resistant trailing cable according to claim 7, wherein the plurality of strands of the conductive core are 19 strands arranged to form a three-layer arrangement, wherein 1 strand of the conductive core is located at a center of the conductive core, wherein 6 strands of the conductive core are spirally wound right around an outer peripheral side of the centrally located conductive core to form a sub-outer layer, and the remaining conductive cores are spirally wound left outside the sub-outer layer.

9. The abrasion-resistant trailing cable of claim 7, wherein the shock absorbing member is a rubber strip and the rubber strip has two, the cable cores have three, the three cable cores, the two rubber strips and the one ground cable core are integrally stranded into a cable, and a total stranded cable pitch is 6 to 8 times an outer diameter of the cable.

10. A method for preparing an abrasion-resistant trailing cable, for manufacturing an abrasion-resistant trailing cable according to any one of claims 1 to 9, comprising the steps of:

s10, preparing a cable core, wherein the center adopts one strand of conductive cable core, the secondary outer layer adopts 6 strands of conductive cable cores and is spirally wound on the periphery side of the center in the right direction, the third layer adopts 12 strands of conductive cable cores and is spirally wound on the outer side of the secondary outer layer in the left direction, the cabling directions of the conductive cable cores of the adjacent layers are opposite, conductive cable core insulating layers and shielding layers are sequentially arranged on the outer sides of the multiple strands of conductive cable cores in a lap wrapping mode, and the overlapping rate is 45% -55%, so that the cable core is obtained;

s20, arranging the first damping buffer layer in the middle of the plurality of conductive cable cores, enabling the plurality of conductive cable cores to be correspondingly attached to the plurality of first arc-shaped installation surfaces one by one, enabling each conductive cable core to be tangent to the adjacent conductive cable core, arranging the plurality of damping pieces and the ground wire cable cores between any two adjacent conductive cable cores one by one, integrally twisting the conductive cable cores, the damping pieces and the ground wire cable cores into a cable, and enabling the total twisting pitch to be 6-8 times of the outer diameter of the cable;

s30, wrapping waterproof tapes with two insulated surfaces around the outer peripheral walls of the plurality of cable cores, the plurality of shock absorbing members and the ground wire cable core;

s40, arranging a first inner sheath and a first woven fiber layer outside the water-blocking tape in sequence, and vulcanizing by adopting steam to enable the first inner sheath close to one side of the water-blocking tape to be embedded into a gap between the cable guiding core and the ground wire cable core and enable the gap between the first inner sheath and the first woven fiber layer to be closely adhered, so that the first inner sheath and the first woven fiber layer are prepared;

s50, arranging a second inner sheath and a second woven fiber layer outside the first woven fiber layer in sequence, vulcanizing by adopting steam, and tightly adhering two sides of the second inner sheath with gaps of the first woven fiber layer and the second woven fiber layer respectively to finish the preparation of the second inner sheath and the second woven fiber layer;

and S60, covering an outer sheath outside the second woven fiber layer.