CN215600151U - Buried long-distance low-attenuation-loss flexible armored symmetrical communication cable - Google Patents

Abstract

The utility model relates to a long-distance low-attenuation-loss flexible armored symmetrical communication cable for underground use, which comprises conductors, wherein the side wall of the outer end of each conductor is uniformly coated with an insulating layer, a copper conductor and the insulating layer jointly form a conductor single body, the conductor single bodies with different colors between two groups are mutually twisted into a pair group in pairs at a certain pitch, the outer sides of the conductor single bodies are coated with single-sided aluminum foils, copper foils are arranged among a plurality of groups of single-sided aluminum foils, the outer sides of the copper foils are wound and connected with copper foils, the outer sides of the copper foils are woven by electrical copper wires, the weaving density is more than 80%, the outer sides of the copper foils are provided with inner sheaths, the outer sides of the inner sheaths are wound with middle isolation sheaths, steel wire armoring is additionally arranged on the outer sides of the middle isolation sheaths in a winding mode, polyester tapes are arranged on the outer sides of the steel wire armoring, and the outer sheaths are extruded and coated with the outer sheaths on the polyester tapes, so that the attenuation loss caused by the cable is greatly reduced and the reliability of transmission is ensured, and simultaneously, the single pair of shields can well prevent mutual crosstalk interference.

Description

Buried long-distance low-attenuation-loss flexible armored symmetrical communication cable

Technical Field

The utility model relates to the field of communication cables, in particular to a long-distance low-attenuation-loss flexible armored symmetrical communication cable for underground use.

Background

At present, a common polyvinyl chloride sheath is generally adopted for the communication cable, and the tensile strength and the compressive property of the cable are poor, so that the common communication cable can only be laid outdoors and cannot be buried and used in severe environment.

Generally, solid PE or PP is adopted for insulation of a communication cable, characteristic impedance is controlled to be about 100OHM, the service length is relatively short, generally not more than 100m, attenuation loss is also large, generally, in consideration of cost, a steel belt double-layer wrapping mode is usually adopted for armor, although the process is simple, the armored cable is relatively hard overall, and the pressure resistance is also poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provide a long-distance low-attenuation-loss flexible armored symmetrical communication cable for underground burying.

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

the utility model provides an bury with soft armor symmetric communication cable of long distance low attenuation loss, includes the conductor, the even cladding of conductor outer end lateral wall has the insulating layer, conductor and insulating layer constitute the wire monomer jointly, and two liang of wire monomers of different colours between two sets of are stranded a pair of group and outside cladding with certain pitch stranding with certain pitch have a single face aluminium foil, multiunit be provided with the copper foil between the single face aluminium foil, the copper foil outside adopts the electrician copper wire to weave and weave density and be greater than 80%, the copper foil outside is provided with the inner sheath, the inner sheath outside winding is provided with middle isolation sheath, the middle isolation sheath outside adopts the winding mode to add and is equipped with the steel wire armor, the steel wire armor outside is provided with the polyester area, the crowded package of polyester outband outside has the oversheath.

Preferably, the conductor is a tin-plated copper conductor and is a regularly-arranged stranded conductor, the insulating layer material is a skin-foam physical foaming material, the equivalent dielectric constant is less than 1.5, and a single-pair shield is adopted after the pair twisting.

Preferably, the insulating layer is made of a physically foamed polyethylene material and has a color of blue (white), orange (white), white (blue), white (orange), and a secondary color of a color ring.

Preferably, the outer sheath is made of a rat-proof and ant-proof PE material.

Preferably, two unit pairs of plus cotton wires are filled in a cable mode between the inner side of the copper foil and the single-sided aluminum foil, and the pitch is 130 +/-10 mm.

Preferably, the inner sheath is made of 8.0 +/-0.3 mm gray PVC material and has a thickness of 0.7 mm.

Preferably, the steel wire armor is formed by winding 34 galvanized copper wires with the diameter of 0.9mm around the armor: 11.80 +/-0.20 mm.

Preferably, the outer sheath is a 14.6 ± 0.5mm black PE rat and ant protection sheath and has a thickness of 1.4 mm.

Has the advantages that:

1. the conductor adopts a regularly arranged stranded conductor, the insulating material adopts a physical foam material with a skin-bubble skin, the equivalent dielectric constant is less than 1.5, and a single pair of shielding is adopted after pair twisting. The attenuation loss caused by the cable is greatly reduced, the transmission reliability is ensured, and meanwhile, the crosstalk interference between the single pair of shields is well prevented.

2. The steel wire is wound by the flexible armor, so that the whole cable still has flexibility, the tensile strength of the cable is extremely high, the cable is guaranteed not to be damaged by stretching when being dragged, and in addition, more than 90 percent of the steel wire is arranged, so that any product implementing the flexible armor cable does not necessarily simultaneously achieve all the advantages.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

the reference numbers in the drawings are as follows:

1-conductor, 2-insulating layer, 3-single-sided aluminum foil, 4-copper foil, 5-electrical copper wire, 6-inner sheath, 7-isolation sheath, 8-steel wire armor, 9-polyester tape, 10-outer sheath and 11-cotton thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, the utility model relates to a long-distance low-attenuation-loss flexible armored symmetrical communication cable for underground use, which comprises a conductor 1, wherein the outer end side wall of the conductor 1 is uniformly coated with an insulating layer 2, the conductor 1 and the insulating layer 2 jointly form a conductor single body, two groups of conductor single bodies with different colors are cabled and twisted in pairs at a certain pitch, the outer sides of the two groups of conductor single bodies are coated with single-sided aluminum foils 3, copper foils 4 are arranged among the multiple groups of single-sided aluminum foils 3, the outer sides of the copper foils 4 are woven by electrical copper wires 5, the weaving density of the copper foils is more than 80%, an inner sheath 6 is arranged on the outer side of the copper foils 4, a middle isolation sheath 7 is wound on the outer side of the inner sheath 6, a steel wire armor 8 is additionally arranged on the outer side of the middle isolation sheath 7 in a winding mode, a polyester belt 9 is arranged on the outer side of the steel wire armor 8, and an outer sheath 10 is extruded on the outer side of the polyester belt 9.

Wherein, conductor 1 is tinned copper conductor 1 and adopts formal arrangement transposition conductor 1, 2 materials on insulating layer adopt skin bubble skin physics foaming material, equivalent dielectric constant <1.5, and adopted single pair shielding after the pair twist, insulating layer 2 adopts physics foaming polyethylene material to make and the colour is blue white, orange white, white blue), white orange, the mode of look ring is used to vice look, oversheath 10 adopts protection against rodents to prevent the PE material of ant to make, adopt two units to fill and the pitch is 130 + -10 mm to the cotton-thread stranding between 4 inboards of copper foil and the single face aluminium foil 3, the material of inner sheath 6 is that 8.0 + -0.3 mm grey PVC material is made and thickness is 0.7mm, steel wire armor 8 adopts 34 zinc-plated copper wire winding armoring of 0.9mm, diameter behind the armor: 11.80 +/-0.20 mm, and the outer sheath 10 is a black PE rat and ant prevention sheath with the thickness of 1.4mm and the thickness of 14.6 +/-0.5 mm.

One specific application of this embodiment is: a long-distance low-attenuation loss flexible armored symmetrical communication cable for underground use is characterized in that a conductor is made of multiple strands of copper wires which are normally twisted, and the conductor is twisted and rounded through an optimized twisting pitch;

the insulation adopts a skin-foam skin physical foaming production technology, the foaming degree is controlled to be 60-65%, and the equivalent dielectric constant of the material is reduced, so that the capacitance of the wire is relatively greatly reduced. Therefore, the characteristic impedance of the cable can be changed, the transmission rate can be improved, the transmission distance can be increased, and the attenuation loss can be reduced;

the special process of the ink color spraying ring is adopted on the insulating surface, so that the original insulating structure is not damaged, and the performance of the cable is not damaged to the greatest extent;

the insulating core wires of the two cores with different color rings are twisted in pairs, the core wires are untwisted by 35% -40% during twisting in pairs, the optimized twisting pitch is achieved, and the performance of the cable is guaranteed through the uniform pitch. A single pair of wrapped aluminum foils is shielded, so that crosstalk interference among multiple pairs of aluminum foils is prevented;

a plurality of pairs of cables are formed, and polyester industrial yarns are adopted for filling, so that the tensile strength of the cable is enhanced while the cable is round;

the shielding layer is wrapped by adopting copper foil, the overlapping rate is more than 25%, the electric surface of the copper foil conductor faces outwards, and the braided copper wire is added, so that the braiding density is not lower than 80%, and the interference resistance of the whole cable is enhanced;

the PVC filling sheath is extruded, the inner sheath filling sheath is extruded outside the weaving in a semi-extrusion mode, the extrusion is round, and the inner layer structure is protected from being damaged.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., 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 utility model. 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.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims (8)

1. The utility model provides a bury with soft armoured symmetrical communication cable of low attenuation loss of long distance, includes conductor (1), its characterized in that: the side wall of the outer end of the conductor (1) is uniformly coated with an insulating layer (2), the conductor (1) and the insulating layer (2) jointly form a conductor single body, the conductor single bodies with different colors between two groups are cabled and twisted in pairs at a certain pitch, the outer side of each conductor single body is coated with a single-sided aluminum foil (3), copper foils (4) are arranged between a plurality of groups of single-sided aluminum foils (3), the outer side of the copper foil (4) is braided by adopting an electrical copper wire (5) and the braiding density is more than 80 percent, an inner sheath (6) is arranged on the outer side of the copper foil (4), a middle isolation sheath (7) is wound on the outer side of the inner sheath (6), the outer side of the middle isolation sheath (7) is additionally provided with a steel wire armor (8) in a winding way, the outer side of the steel wire armor (8) is provided with a polyester tape (9), and the outer side of the polyester tape (9) is extruded and wrapped with an outer sheath (10).

2. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: the conductor (1) is a tinned copper conductor (1) and adopts a regularly-arranged stranded conductor (1), the insulating layer (2) is made of a skin-foam physical foaming material, the equivalent dielectric constant is less than 1.5, and a single pair of shields are adopted after pair twisting.

3. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: the insulating layer (2) is made of a physically foamed polyethylene material, and is blue, orange, white and white in color, and the secondary color is in a color ring mode.

4. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: the outer sheath (10) is made of a rat-proof and ant-proof PE material.

5. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: two units of the cotton threads (11) are filled between the inner side of the copper foil (4) and the single-sided aluminum foil (3) in a cable-forming mode, and the pitch is 130 +/-10 mm.

6. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: the inner sheath (6) is made of 8.0 +/-0.3 mm gray PVC material and is 0.7mm in thickness.

7. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: the steel wire armor (8) adopts 34 galvanized copper wires with the thickness of 0.9mm to wind the armor, and the diameter of the armored steel wire armor is as follows: 11.80 +/-0.20 mm.

8. The flexible armored symmetric communication cable for long distance and low attenuation loss for underground use according to claim 1, wherein: the outer sheath (10) is a black PE rat and ant prevention sheath with the thickness of 1.4mm and the thickness of 14.6 +/-0.5 mm.

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