CN202549488U - Photoelectric compound cable for 3G launching tower base station - Google Patents

Abstract

The utility model discloses a photoelectric composite cable for a base station of a 3G transmission tower, which comprises a cable core, a tape, an armor layer and an outer sheath arranged in sequence from the inside to the outside; the cable core includes an electric unit twisted into a cable, The optical unit and the filling rope; the electrical unit is composed of a conductor and conductor insulation, and the conductor is an aluminum alloy or aluminum or copper conductor conforming to the IEC60228 standard; the optical unit includes a plurality of optical fibers, a loose tube, a water-blocking layer and Fiber jacket. The structure of the cable of the utility model adopts the structure that the optical unit and the electrical unit are twisted together, the electrical unit bears the electric power and mechanical load of the cable, and the optical unit is responsible for transmitting signals, rationally utilizing resources and saving wiring space.

Description

Photoelectric composite cable for 3G transmission tower base station

technical field

The utility model relates to a photoelectric composite cable, in particular to a photoelectric composite cable for a 3G transmission tower base station.

Background technique

Since the 1980s, my country's mobile communications have achieved rapid development of 1G (analog technology), 2G (digital technology), and 3G. At present, it is accelerating the commercial operation of 3G+ and 4G new technologies. With the ringing of the 3G bell, the problems caused by the repetitive construction of mobile communication networks will become increasingly serious. First of all, the large-scale repetitive construction of various operators will inevitably cause a huge waste of funds and occupy a large amount of natural resources. Secondly, due to the current lack of unified planning and management by government departments, operators often adopt exclusive methods when acquiring base station sites. With the increasing shortage of site resources, the cost of leasing/purchasing site computer rooms will inevitably continue to increase. At present, 3G network construction is mainly combined with 2G/2.5G network for coverage, forming a multi-channel hybrid network. Therefore, mobile communication operators need to carry out unified planning with the existing 2G/2.5G network, that is, to choose electronically adjustable antennas that can be monitored and adjusted uniformly when the investment cost permits. In order to save costs, we can use reasonable technology Under the premise of network planning, the operator's existing communication infrastructure (including computer rooms, iron towers, transmission, etc.) should be fully utilized to reduce redundant construction and reduce construction and operation costs.

In order to reduce repetitive construction and reduce construction and operating costs, it is imperative to develop a new type of photoelectric composite cable for 3G transmission towers that can simultaneously perform power transmission and signal transmission. Among the existing patents, the photoelectric composite cable for communication disclosed in the utility model patent ZL200920066882.6 adopts the "8"-shaped structure photoelectric composite cable, which is easy to turn over during the laying process, so that the internal optical unit is caused by laying during the signal transmission process. The torsion affects the transmission of the signal and reduces the comprehensive advantages of the photoelectric composite cable. Another utility model patent ZL201020261808.2 discloses that the photoelectric composite cable for optical fiber to the top of the tower uses a corrugated aluminum tube as the armor layer structure of the cable. During the production process, the requirements for the outer diameter control of the composite cable core are relatively high, which increases the difficulty of production. , It is also not suitable for large cross-section conductors. In addition, the number of optical fibers in this structure is small, and the transmission capacity has certain limitations. The central tube photoelectric composite cable disclosed in the utility model patent ZL201020655801.9 has high requirements on the insulation performance of the outer sheath of the cable, and this structure is suitable for some small-section conductors, and the current carrying capacity of the equipment using the cable should not be too high. big. For conductor structures with larger cross-sections, in order to ensure electrical insulation performance, it is necessary to increase the thickness of the cable sheath, which increases the outer diameter of the cable, thereby increasing the production cost, and at the same time reduces the bending performance of the cable, resulting in difficulty in laying and lengthening. Working at heights time. The above-mentioned photoelectric composite cable for 3G transmission towers is only suitable for small-section power cable cores, and the structure is complex, which increases production costs and high-altitude operation time.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a simple structure, lower material cost, which can reduce the time of high-altitude work, simplify the wiring process, and at the same time save the occupation of the climbing position of the cable rack and reduce the installation cost. Photoelectric composite cable for 3G transmission tower base station.

The technical solution to realize the purpose of this utility model is a photoelectric composite cable for a 3G transmission tower base station, including a cable core, a tape, an armor layer and an outer sheath arranged in sequence from the inside to the outside; the cable core includes a stranded cable The electrical unit, the optical unit and the filling rope; the electrical unit is composed of a conductor and conductor insulation, and the conductor is an aluminum alloy or aluminum or copper conductor conforming to the IEC60228 standard; the optical unit includes a plurality of optical fibers, loose tubes, Water barrier and fiber jacket.

The armor layer adopts a steel-plastic composite tape with ring embossing.

The outer sheath is a UV-resistant outer sheath.

The number of optical fibers in the optical unit is 2-216.

Adopting the above technical scheme, the utility model has the following beneficial effects: (1) The structure of the cable of the utility model adopts the structure that the optical unit and the electric unit are twisted together, and the electric unit bears the electric power and mechanical load of the cable, and the optical unit The unit is responsible for transmitting signals, rationally utilizing resources, and saving wiring space.

(2) The conductor of the electric unit of the present utility model can be selected according to needs. When the line carrying capacity is relatively large, an aluminum alloy conductor can be used. The mechanical properties of the aluminum alloy conductor material are equivalent to those of the copper conductor, and are heavier than the copper conductor material It is lighter and can bear the weight of the cable itself when it is laid vertically, eliminating the need for an intermediate reinforcing core structure; when the current carrying capacity of the line is small, copper conductor materials can be used, with large transmission capacity and high mechanical properties

(3) The armor layer of the utility model adopts steel-plastic composite tape with ring corrugation, and the design of the ring corrugation has a waterproof function, so that the cable of the utility model is suitable for use in an open-air environment, which can prevent the cable from getting damp and reduce water molecules. For the internal composite cable, the steel and plastic composite tape armor not only plays a role in mechanical protection, but also reduces the weight of the armor layer compared with the pure metal armor layer. At the same time, the steel tape of the steel-plastic composite tape also protects the entire cable It has the function of power protection and can guide the current to ground in time.

(4) The outer sheath of the utility model adopts an anti-ultraviolet sheath, which can reduce the influence of solar radiation and prolong the service life of the cable when used in an open-air environment.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

Fig. 1 is a schematic cross-sectional view of the utility model.

The labels in the accompanying drawings are:

Cable core 1, electrical unit 11, conductor 11-1, conductor insulation 11-2, optical unit 12, optical fiber 12-1, loose tube 12-2, water blocking layer 12-3, optical fiber sheath 12-4, filling Rope 13, wrapping tape 2, armor layer 3, outer sheath 4.

Detailed ways

(Example 1)

Referring to Fig. 1, the photoelectric composite cable for 3G transmission tower base station of this embodiment includes a cable core 1, a tape 2, an armor layer 3 and an outer sheath 4 arranged in sequence from the inside to the outside.

The cable core 1 comprises an electrical unit 11 , an optical unit 12 and a filler rope 13 twisted into a cable. The electric unit 11 is composed of a conductor 11-1 and a conductor insulation 11-2, and the conductor 11-1 is an aluminum alloy or aluminum or copper conductor conforming to the IEC60228 standard. In the case of small current carrying capacity, solid or stranded copper conductors can be used. In the case of large carrying capacity, aluminum alloy conductors can be used. Aluminum alloy materials have small specific gravity, light weight, and similar mechanical properties to copper materials. , When laid vertically, it can bear the load of the cable and transmit power at the same time.

The optical unit 12 includes a plurality of optical fibers 12-1, a loose tube 12-2, a water blocking layer 12-3 and an optical fiber sheath 12-4, and the number of optical fibers 12-1 of the optical unit 12 is 2-216.

The armor layer 3 adopts a steel-plastic composite tape with ring embossing. The design of circular embossing can effectively prevent the entry of moisture in the longitudinal direction, and the steel-plastic composite tape armor not only plays a role in mechanical protection, but also reduces the weight of the armor layer compared with the pure metal armor layer, while the steel-plastic The steel belt of the composite belt also has an electrical protection effect on the entire cable, and can guide current grounding (such as lightning current) in time.

The outer sheath 4 is an ultraviolet-resistant outer sheath. The sheath material can be polyvinyl chloride sheath material, polyethylene sheath material, low-smoke halogen-free sheath material, which can effectively reduce the influence of solar radiation and increase the outdoor service life of the cable.

During production, the electrical unit 11 and the optical unit 12 are twisted together and then wrapped with a layer of tape 2, then armored with a circular corrugated steel-plastic composite tape, and then a layer of anti-ultraviolet protective film is extruded outside the armor layer 3. The outer sheath 4 finally forms a complete photoelectric composite cable for 3G transmission towers.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (4)

1. a 3G launching tower base station is used up to reply by cable and is closed cable, comprises the cable core (1), band (2), armour (3) and the oversheath (4) that set gradually from the inside to the outside; It is characterized in that: said cable core (1) comprises electric unit (11), light unit (12) and the gasket for packing (13) of stranded stranding; Said electric unit (11) is made up of conductor (11-1) and conductor insulation (11-2), and said conductor (11-1) is for meeting aluminium alloy or the aluminium or the copper conductor of IEC60228 standard; Said smooth unit (12) comprises multifiber (12-1), loose sleeve pipe (12-2), water blocking layer (12-3) and optical fiber jacket (12-4).

2. 3G launching tower according to claim 1 base station is used up to reply by cable and closed cable, it is characterized in that: said armour (3) adopts the composite steel-plastic belt of annular embossing.

3. 3G launching tower according to claim 1 base station is used up to reply by cable and closed cable, it is characterized in that: said oversheath (4) is the antiultraviolet oversheath.

4. use up to reply by cable according to the described 3G launching tower of one of claim 1 to 3 base station and close cable, it is characterized in that: the radical of the optical fiber (12-1) of said smooth unit (12) is 2～216.

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