CN220731232U - High-flexibility cold-resistant data cable - Google Patents

Abstract

The utility model discloses a high-flexibility cold-resistant data cable, and relates to the technical field of cables. The high-flexibility cold-resistant data cable comprises a cable core, and a third wrapping band layer, a second shielding layer, a fourth wrapping band layer and a sheath layer which are sequentially arranged outside the cable core; a filling layer is arranged in a gap between the cable core and the third wrapping layer; the cable core comprises an insulating wire core, and a first wrapping belt layer, a first shielding layer and a second wrapping belt layer are sequentially arranged outside the insulating wire core; the insulated wire core sequentially comprises a conductor and an insulating layer from inside to outside; a plurality of early warning conductors are arranged in the sheath layer and coaxial with the sheath layer in an annular array; the early warning conductor is in signal connection with an external alarm; the early warning conductor adopts copper wires with the diameter of 0.1-0.4 mm.

Description

High-flexibility cold-resistant data cable

Technical Field

The utility model relates to the technical field of cables, in particular to a high-flexibility cold-resistant data cable.

Background

With the rapid development of optical communication technology, optical cables are commonly used in backbone networks and interoffice trunk lines of wired communication networks in China, and optical fibers enter an access network to become a necessary trend. However, the optical cable is too expensive to lay, the splice and the terminal optical-to-electrical conversion are expensive, so that the subscriber line of the access network will remain metal-based for a long period of time before the optical fiber is popularized. The metal cable mainly comprises three types of plastic cables, coaxial cables and data cables. The data cable is the transmission medium of the broadband access network which is ideal at present, has the advantages of lower manufacturing cost, simple structure, good expandability and convenient network upgrade, and is mainly used for building comprehensive wiring, community computer comprehensive wiring and the like.

As the footprint of human exploration extends throughout the world, the application of data cables extends to every corner of the world, naturally not to the cold and cold regions. Currently, most data cables are only suitable for a normal-temperature ring with a relatively narrow temperature range, and in alpine regions, the data cables have serious safety problems such as hardening, cracking, embrittlement and the like, and are not suitable for alpine environments any more, so that the problem of power supply in alpine regions is very serious. In order to solve the above problems, the chinese utility model patent No. 201620968623.2 solves the above problems by using thermoplastic vulcanizates for the outer jacket layer and the insulation layer. However, after the cable is used for a long time in a low-temperature environment, the cable is broken due to improper use, external force factors or aging and the like, so that an early warning conductor is required to be arranged in the cable, and the early warning effect can be achieved when the cable is damaged. The existing early warning conductor is generally formed by twisting an independent cable core with other cable cores during cabling, and is warned once the cable is broken, but the cable is destroyed to the inner core, so that the value of reuse is not increased, and the early warning cost of the cable is greatly increased. And the cable is damaged and is preferentially damaged, and in most cases, the damage of the outer sheath does not affect the internal structure, and the conventional early warning wire core is not damaged, so that the early warning effect is not achieved.

Accordingly, the applicant has improved the structure of the data cable to solve the above problems.

Disclosure of Invention

In order to solve the existing technical problems, the utility model provides a high-flexibility cold-resistant data cable which comprises a cable core, and a third wrapping layer, a second shielding layer, a fourth wrapping layer and a sheath layer which are sequentially arranged outside the cable core; a filling layer is arranged in a gap between the cable core and the third wrapping layer; the cable core comprises an insulating wire core, and a first wrapping belt layer, a first shielding layer and a second wrapping belt layer are sequentially arranged outside the insulating wire core; the insulated wire core sequentially comprises a conductor and an insulating layer from inside to outside; a plurality of early warning conductors are arranged in the sheath layer and coaxial with the sheath layer in an annular array; the early warning conductor is in signal connection with an external alarm; the early warning conductor adopts a copper wire with the diameter of 0.1-0.4 mm; according to the high-flexibility cold-resistant data cable, the copper wires with the diameters of 0.1-0.4 mm are arranged in the sheath layer to serve as the early warning conductors, so that the cost is saved, the copper wires of the early warning conductors are easier to break when the cable outer sheath is broken, further early warning can be rapidly performed, technicians are reminded to repair, and larger danger is avoided.

Preferably or alternatively, the conductor is composed of a plurality of conductor layers and a separator layer disposed between the conductor layers; the separation belt layers are arranged between the conductor layers, so that the conductor layers can be separated from each other, and the friction resistance between the conductor layers when the conductor is bent is reduced.

Preferably or alternatively, the conductor layer is formed by bunching and twisting a sixth tinned copper wire in the same direction; the wire diameter of the sixth tinned copper wire is 0.145-0.195 mm; the conductor layer is made of a thin and soft tin-plated copper wire with the wire diameter of 0.145-0.195 mm, so that the flexibility of the conductor layer can be enhanced.

Preferably or alternatively, the material of the separation belt layer is a thin polyester belt; the separation belt layer is made of thin polyester belts with small friction resistance and smooth surfaces, so that the friction resistance between the conductor layers during bending of the conductors is greatly reduced.

Preferably or alternatively, the material of the sheath layer is TPU elastomer; the sheath layer adopts cold-resistant, oil-resistant and wear-resistant TPU elastomer, so that the flexibility of the cable is ensured, and the cable can safely run in an environment of-60 ℃.

Preferably or alternatively, the first shielding layer and the second shielding layer are both woven by tinned copper wires.

Preferably or alternatively, the material of the filling layer is polypropylene filling rope.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the high-flexibility cold-resistant data cable, the copper wires with the diameters of 0.1-0.4 mm are arranged in the sheath layer to serve as the early warning conductors, so that the cost is saved, the copper wires of the early warning conductors are easier to break when the cable outer sheath is broken, further early warning can be rapidly performed, technicians are reminded to repair, and further damage of the cable and electric shock risks of workers are prevented.

2. The conductor of the utility model is composed of a plurality of conductor layers and a separation belt layer arranged between the conductor layers; the separation belt layers are arranged between the conductor layers, so that the conductor layers can be separated from each other, and the friction resistance between the conductor layers when the conductor is bent is reduced.

3. The conductor layer of the utility model adopts the thin and soft sixth tinned copper wires with the wire diameter of 0.145-0.195 mm, so that the flexibility of the conductor layer can be enhanced.

4. The separation belt layer is made of a thin polyester belt with small friction resistance and smooth surface, so that the friction resistance between the conductor layers during bending of the conductor is greatly reduced.

5. The sheath layer of the utility model adopts cold-resistant, oil-resistant and wear-resistant TPU elastomer, which ensures the flexibility of the cable and ensures the safe operation of the cable in the environment of-60 ℃.

Drawings

Fig. 1 is a schematic structural view of a highly flexible cold-resistant data cable according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a conductor of a highly flexible cold-resistant data cable according to an embodiment of the present utility model.

The reference numerals are: the device comprises a conductor 1, a first conductor layer 1-1, a first separation tape layer 1-2, a second conductor layer 1-3, a second separation tape layer 1-4, a third conductor layer 1-5, an insulating layer 2, a first tape layer 3, a first shielding layer 4, a second tape layer 5, a filling layer 6, a third tape layer 7, a second shielding layer 8, a fourth tape layer 9, a sheath layer 10 and an early warning conductor 11.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples, which should not be construed as limiting the utility model.

Example 1

Referring to fig. 1-2, a high-flexibility cold-resistant data cable of the present embodiment includes two cable cores, and a third wrapping layer 7, a second shielding layer 8, a fourth wrapping layer 9, and a sheath layer 10 sequentially disposed outside the cable cores; the two cable cores are arranged, and gaps between the two cable cores and the third wrapping layer 7 are filled by the filling layer 6; two early warning conductors 11 are symmetrically arranged in the center of the sheath layer 10; the early warning conductor 11 is in signal connection with an external alarm.

The cable core of this embodiment includes two insulation core, and insulation core sets gradually first band layer 3, first shielding layer 4, second band layer 5 outward.

The insulated wire core of the embodiment sequentially comprises a conductor 1 and an insulating layer 2 from inside to outside;

the conductor 1 of the present embodiment includes, from inside to outside, a first conductor layer 1-1, a first separator layer 1-2, a second conductor layer 1-3, a second separator layer 1-4, and a third conductor layer 1-5 in this order.

The first conductor layer 1-1, the second conductor layer 1-3 and the third conductor layer 1-5 are all formed by twisting sixth tinned copper wire bundles in the same direction; the wire diameter of the sixth tinned copper wire is 0.145mm.

The first separation belt layer 1-2 and the second separation belt layer 1-4 of the embodiment are respectively obtained by wrapping thin polyester belts outside the first conductor layer 1-1 and the second conductor layer 1-3; the thickness of the thin polyester tape was 0.015mm.

The material of the jacket layer 10 of this embodiment is TPU elastomer jacket material.

The first shielding layer 4 and the second shielding layer 8 of the present embodiment are both woven from tin-plated copper wires.

The material of the filling layer 6 of the present embodiment is a polypropylene filling rope.

The early warning conductor 11 of this embodiment employs a copper wire with a diameter of 0.2 mm.

The processing technology of the high-flexibility cold-resistant data cable of the embodiment is as follows:

(1) A plurality of tinned copper wires with the diameter of 0.145mm are adopted to be twisted into a conductor 1 with the required specification, the conductor is twisted in 3 layers, each layer of polyester tape with the thickness of 0.015mm is wrapped outside each layer, each layer of conductor is twisted in the right direction, and the twisting pitch is set to be 25-30 times of the outer diameter of the conductor, so that the conductor 1 is obtained;

(2) Extruding a layer of special polyethylene insulating material for a data wire on the outer side of a conductor 1, wherein the thickness is not less than 0.6mm, a 70-type extruder is adopted, the length-diameter ratio of a screw is 12-20, the temperature parameter of the extruder during extrusion is 160+ -5 ℃, 170+ -5 ℃ in a 2 region, 180+ -5 ℃ in a 3 region, 190+ -5 ℃ in a 4 region, 190+ -5 ℃ in a 5 region, and 195+ -5 ℃ in a machine head, and the machine head is linked with a host controller by an infrared polarization meter, so that the concentricity of the conductor 1 and the insulating layer 2 is ensured to be more than 95%, and a vacuum extractor is additionally arranged on the machine head, so that the insulating material can be tightly coated on the conductor to obtain an insulating wire core; three-section water cooling is adopted after the insulated wire core is extruded, so that the insulated wire core is guaranteed to be rapidly cooled to room temperature, the thickness, concentricity and apparent mass of the thinnest point of insulation are checked after the extrusion is finished, the insulated wire core has no defect, and the next procedure is carried out;

(3) The insulated wire cores are twisted pairwise, the pay-off rack is opened for back twisting, the twisting pitch is required to be less than 50mm, the pitch difference is kept between 2 and 3mm, the front pitch and the rear pitch of the wire pairs are consistent, and a first wrapping tape layer 3 is wrapped by a wrapping tape immediately after the pairing twisting is finished;

(4) In order to prevent mutual crosstalk of signals between wire pairs, a first shielding layer 4 is woven by adopting tinned copper wires outside a first wrapping belt layer 3, a 16-spindle braiding machine is adopted, the tinned copper wires with the diameter of 0.12mm are used for braiding, the braiding angle is controlled to be 30-60 degrees, the braiding density is more than 90 percent, joints are not required to be arranged as much as possible in the process of braiding the tinned copper wires, if connection is required, the joints are required to be smooth and cannot be allowed to damage an insulating layer, a second wrapping belt layer 5 is wrapped by adopting wrapping belts after braiding is finished, the first shielding layer 4 is fixed, and the tinned copper wire joints are prevented from being exposed, so that a cable is obtained;

(5) Twisting the two cables, controlling the cable outer diameter with the pitch of 16-20 times, filling the polypropylene filling rope to form a filling layer 6, ensuring the round and compact appearance, and then fixing the cables around the wrapping belt to form a third wrapping belt 7;

(6) In order to prevent the interference of external signals on the cable, a second shielding layer 8 is woven by adopting tinned copper wires on the outer layer of a third wrapping layer 7, a 24-spindle braiding machine is adopted, 0.18mm tinned copper wires are used for braiding, the braiding angle is controlled to be 30-60 degrees, the braiding density is more than 90%, joints are not required to be arranged as much as possible in the tinned copper wires braiding process, if connection is required, the joints are required to be smooth, the tinned copper wire joints are ensured not to damage a sheath layer, and a fourth wrapping layer 9 is wrapped by adopting wrapping belts after braiding is finished;

(7) Finally, extruding a layer of TPU elastomer sheath layer 10 outside the fourth wrapping belt layer 9 by adopting a 90-type extruder, wherein the thickness is larger than 1.5mm, the length-diameter ratio of a screw is 20-25, the temperature parameters of the extruder during extrusion are 1 region 140+/-5 ℃,2 region 160+/-5 ℃,3 region 170+/-5 ℃,4 region 170+/-5 ℃, and the head and die orifice 170+/-5 ℃, and the thickness and appearance quality of the thinnest point are checked after the extrusion is finished, so that no damage is ensured; wherein, when extruding the sheath layer 10, two copper wires with the diameter of 0.2mm are arranged at symmetrical positions in the sheath layer 10 in a mode of winding, pulling and directly dragging, so that the preparation of the high-flexibility cold-resistant data cable is completed.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Claims (7)

1. The high-flexibility cold-resistant data cable is characterized by comprising a cable core, and a third wrapping layer (7), a second shielding layer (8), a fourth wrapping layer (9) and a sheath layer (10) which are sequentially arranged outside the cable core; a filling layer (6) is arranged in a gap between the cable core and the third wrapping layer (7); the cable core comprises an insulating wire core, and a first wrapping belt layer (3), a first shielding layer (4) and a second wrapping belt layer (5) are sequentially arranged outside the insulating wire core; the insulated wire core sequentially comprises a conductor (1) and an insulating layer (2) from inside to outside; a plurality of early warning conductors (11) are coaxially and uniformly arranged in the sheath layer (10); the early warning conductor (11) is in signal connection with an external alarm; the early warning conductor (11) adopts copper wires with the diameter of 0.1-0.4 mm.

2. The high flexibility cold-resistant data cable according to claim 1, wherein the conductor (1) is constituted by a plurality of conductor layers and a separator layer provided between the conductor layers.

3. The high-flexibility cold-resistant data cable according to claim 2, wherein the conductor layer is made of sixth tinned copper wires, and is obtained by wire bundling and co-current twisting; the wire diameter of the sixth tinned copper wire is 0.145-0.195 mm.

4. The high flexibility cold-resistant data cable of claim 2 wherein the separator tape layer material is a thin polyester tape.

5. The high flexibility cold-resistant data cable according to claim 1, wherein the material of the sheath layer (10) is TPU elastomer.

6. The high-flexibility cold-resistant data cable according to claim 1, wherein the first shielding layer (4) and the second shielding layer (8) are woven from tinned copper wires.

7. The high flexibility cold-resistant data cable according to claim 1, wherein the material of the filler layer (6) is polypropylene filler rope.