CN203325538U - Overhead cable with function of resisting bird pecking - Google Patents

Abstract

The utility model discloses an overhead cable with the function of preventing bird pecking, which comprises steel wires as self-supporting wires, eight copper wires covered with a polyethylene layer and a red outer sheath body; the eight copper wires are twisted in pairs Combined to form four pairs of twisted wires for information communication, the first twisted pair, the second twisted pair, the third twisted pair and the fourth twisted pair of the four twisted wires are arranged counterclockwise and twisted A conductive cable core is formed; a polyester tape is wrapped around the outer surface of the conductive cable core, and an inner sheath layer is extruded on the outer surface of the polyester tape; the red outer sheath body includes a first sub-sheath and The second sub-sheath, the first sub-sheath and the second sub-sheath are connected by a connecting rib, the first sub-sheath covers the outer surface of the inner sheath layer, and the second sub-sheath The sub-sheath covers the outer surface of the steel wire. The overhead cable of the utility model not only guarantees the transmission characteristics of outdoor cable products, but also greatly increases the ability of the cable to affect the use performance due to stretching, facilitates application and maintenance, and improves maintenance efficiency.

Description

Aerial cables with bird peck protection

technical field

The utility model relates to an overhead cable, in particular to an overhead cable with the function of preventing bird pecking.

Background technique

The structure of ordinary single-type communication cables: the main structure of the cable is that the copper conductor is extruded with a layer of insulation, the single wire is twisted and then cabled, and the outer structure is made of polyolefin outer sheath. In the decoration distribution system and automatic detection system, large stretching, unstable quality, cumbersome wiring, and unreliability affect the performance.

Contents of the invention

The utility model provides an overhead cable with the function of preventing bird pecking. While ensuring the transmission characteristics of outdoor cable products, the overhead cable greatly increases the ability of the cable to affect the use performance due to stretching, which is convenient for application and maintenance, and improves maintenance efficiency.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an overhead cable with anti-bird pecking function, including steel wires as self-supporting wires, eight copper wires coated with polyethylene layers and a red outer sheath body ; The eight copper wires are twisted in pairs to form four pairs as twisted wire pairs for information communication, the first twisted wire pair, the second twisted wire pair, the third twisted wire pair and the fourth twisted wire pair in the four twisted wire pairs The twisted wire pairs are arranged counterclockwise and twisted to form a conductive cable core;

A polyester tape is wrapped on the outer surface of the conductive cable core, and an inner sheath layer is extruded on the outer surface of the polyester tape;

The red outer sheath body includes a first sub-sheath and a second sub-sheath, the first sub-sheath and the second sub-sheath are connected by a connecting rib, and the first sub-sheath covers On the outer surface of the inner sheath layer, the second sub-sheath covers the outer surface of the steel wire.

Further improvement technical scheme in above-mentioned technical scheme is as follows:

1. The aerial cable according to claim 1, characterized in that: the pitch of the first twisted wire pair is 10.6mm, the pitch of the second twisted wire pair is 14.1mm, and the third twisted wire pair The pitch of the pairs is 11.8 mm and the pitch of the fourth twisted pair is 16.4 mm.

2. In the above scheme, the thickness ratio of the first sub-sheath to the inner sheath layer is 5:1.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

1. The overhead cable with anti-bird pecking function of this utility model has the characteristics of replacing the existing self-supporting communication data cable, and its transmission characteristics can meet the transmission requirements of urban communication cables. Since the cable adopts a new self-supporting structure , which effectively improves the problem that the stretching is large and affects the performance; at the same time, because the sheath layer of the cable is bright in color, birds are more afraid of such colors, and the material has the functions of not decomposing when exposed to water and preventing ultraviolet radiation, which is very convenient. It is a new product with development prospects, and its performance indicators meet the requirements of relevant product standards.

2. The overhead cable with anti-bird pecking function of the utility model adopts steel wire as the main tensile element. The red polyolefin material, which is more sensitive to birds, has the characteristics of not easy to crack, not decompose when exposed to water, and anti-ultraviolet, which greatly increases the ability of the cable to affect the performance due to stretching.

Description of drawings

Accompanying drawing 1 is the structural schematic diagram of the aerial cable with anti-bird pecking function of the utility model.

In the above drawings: 1. Steel wire; 2. Copper wire; 21. Polyethylene layer; 3. Red outer sheath body; 31. First sub-sheath; 32. Second sub-sheath; 33. Rib part; 4. Twisted pair; 41. The first twisted pair; 42. The second twisted pair; 43. The third twisted pair; 44. The fourth twisted pair; 5. Conductive cable core; 6. Polyester tape; 7. Inner sheath layer.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: An overhead cable with anti-bird pecking function, comprising a steel wire 1 as a self-supporting wire, eight copper wires 2 coated with a polyethylene layer 21 and a red outer sheath 3; the eight copper wires 2 Twisting in pairs to form four pairs of twisted wire pairs 4 for information communication, the first twisted wire pair 41, the second twisted wire pair 42, the third twisted wire pair 43 and the fourth twisted wire pair in the four pairs of twisted wire pairs Pairs 44 are arranged counterclockwise and twisted to form conductive cable core 5;

A polyester tape 6 is wrapped on the outer surface of the conductive cable core 5, and an inner sheath layer 7 is extruded on the outer surface of the polyester tape 6;

The red outer sheath body 3 includes a first sub-sheath 31 and a second sub-sheath 32, the first sub-sheath 31 and the second sub-sheath 32 are connected by a rib portion 33, the first sub-sheath 31 and the second sub-sheath 32 are connected by a rib portion 33, the first A sub-sheath 31 covers the outer surface of the inner sheath layer 7 , and the second sub-sheath 32 covers the outer surface of the steel wire 1 .

The pitch of the first twisted pair 41 is 10.6mm, the pitch of the second twisted pair 42 is 14.1mm, the pitch of the third twisted pair 43 is 11.8mm, and the fourth twisted pair Pair 44 has a pitch of 16.4mm.

The thickness ratio of the first sub-sheath 31 to the inner sheath layer 7 is 5:1.

The development process of the utility model technology is as follows:

The utility model technology is used as a transmission line in the collection and distribution system and the automatic detection system in the harsh environment of the outdoor decoration or the local machine room.

Therefore, this technology considers the stability and reliability of the transmission performance of the cable, the stability and reliability of the quality of the self-supporting line, and the stability of the product manufacturing process.

The development process of the utility model technology is as follows:

1. Determination of product technical solutions

1.1 Main performance indicators of finished cables

Conductor DC resistance (20°C): ≤95 Ω/km;

Working capacitance of the cable: ≤56 nF/km;

Cable insulation resistance: ≥10000 MΩ·km

Near-end crosstalk attenuation (at 1024KHz): ≥79 dB

2. The process of the product:

2.1 In the insulation extrusion process, an extruder with adjustable eccentricity and a tungsten steel extrusion die are used to perform synchronous control of capacitance, insulation outer diameter, and eccentricity online.

2.2 After the outdoor cables are back-twisted, use a certain pitch for cable twisting.

2.3 The cable core and self-supporting steel wire are extruded at the same time to wrap the outer sheath, which improves the tensile and bending resistance of the cable, ensures that the cable has no tensile strain, and ensures long-term stability of its transmission characteristics.

3. Product testing: test and evaluate the electrical performance of the product.

4. Monitor the running status of the product in the application system.

When the above-mentioned overhead cable with anti-bird pecking function is used, it has the characteristics of replacing the existing self-supporting communication data cable, and its transmission characteristics can meet the transmission requirements of urban communication cables. Since the cable adopts a new self-supporting structure, It has effectively improved the problem of large stretching and affecting performance; at the same time, due to the bright color of the sheath layer of the cable, birds are more afraid of such colors, and the material has functions such as non-decomposition in contact with water and anti-ultraviolet radiation, which greatly facilitates Emergency maintenance, improving maintenance efficiency and maintenance quality, is a new product with development prospects. The performance indicators of the product meet the requirements of relevant product standards; extension components. The red polyolefin material, which is more sensitive to birds, has the characteristics of not easy to crack, not decompose when exposed to water, and anti-ultraviolet, which greatly increases the ability of the cable to affect the performance due to stretching.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (3)

1. An overhead cable with anti-bird pecking function, characterized in that it includes steel wire (1) as a self-supporting wire, eight copper wires (2) covered with polyethylene layer (21) and a red outer sheath body (3); the eight copper conductors (2) are twisted in pairs to form four pairs of twisted wire pairs (4) for information communication, and the first twisted pair (41) and the second twisted pair of the four twisted wire pairs are The second twisted pair (42), the third twisted pair (43) and the fourth twisted pair (44) are arranged counterclockwise and twisted to form a conductive cable core (5); A polyester tape (6) is wrapped on the outer surface of the conductive cable core (5), and an inner sheath layer (7) is extruded and wrapped on the outer surface of the polyester tape (6); The red outer sheath body (3) includes a first sub-sheath (31) and a second sub-sheath (32), between the first sub-sheath (31) and the second sub-sheath (32) Connected by a connecting rib (33), the first sub-sheath (31) covers the outer surface of the inner sheath layer (7), and the second sub-sheath (32) covers the steel wire (1) Outer surface. 2. The overhead cable according to claim 1, characterized in that: the pitch of the first twisted pair (41) is 10.6mm, the pitch of the second twisted pair (42) is 14.1mm, The pitch of the third twisted wire pair (43) is 11.8mm, and the pitch of the fourth twisted wire pair (44) is 16.4mm. 3. The aerial cable according to claim 1, characterized in that: the thickness ratio of the first sub-sheath (31) to the inner sheath layer (7) is 5:1.

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