Lightning protection photoelectric composite cable for communication base station

Abstract

The invention belongs to the technical field of cables, and relates to a lightning protection photoelectric composite cable for a communication base station. The lightning protection photoelectric composite cable comprises a cable core, an inner sheath, an armor layer, an outer sheath, a grounding layer, a connecting rib, a suspension wire, a suspension wire protection layer and an optical unit. A first protection layer covers the cable core. The inner sheath covers the first protection layer in an extruding mode. A second protection layer covers the inner sheath. The grounding layer is located outside the second protection layer. The armor layer covers the grounding layer, and the outer sheath covers the armor layer in an extruding mode. The suspension wire protection layer covers the suspension wire, one end of the connecting rib is connected with the suspension wire protection layer, and the other end of the connecting rib is connected with the outer sheath. The lightning protection photoelectric composite cable is characterized in that the suspension wire is located outside the optical unit, the optical unit and the suspension wire are both located in the suspension wire protection layer, the suspension wire is composed of multiple reinforcing pieces, and the outer edges of all the reinforcing pieces are located on the same cylindrical surface. The lightning protection photoelectric composite cable has the following main advantages that manufacturing is easy, the production speed is high, electrical resistivity of the grounding layer is lower, maintenance cost is lower, and optical communication is not affected by lightning.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a lightning-proof photoelectric composite cable used for communication base stations. Background technique [0002] In the past 20 years, my country's information industry has grown at an average annual rate of 25%, ahead of other industries, and has become the first pillar industry in the industry. It is estimated that in the next 10 years, the information industry will double again. Among the products in the communication industry, special lightning protection optical cables for communication with higher safety performance will have a good market prospect. With the construction of the 3G network communication network, the lightning protection measures of the communication base station computer room will also be considered to avoid the power interruption of the communication base station and the computer room being caught on fire due to lightning, which will cause a ...

AI Technical Summary

Problems solved by technology

However, they still have the following deficiencies: (1) the ground layer adopts the method of oblique wrapping, and the production speed is slow; (2) the armor layer only plays the role of armor, (3) after being struck by lightning, the part of the cable The grounding layer is blown, so that the inner sheath melts in the cable core interval and the insulated wire cores are integrated, making it difficult to separate the insulated wire cores; it can only be disposed of as waste products; the above shortcomings increase the maintenance cost of the cable after lightning strikes

[0004] In addition, the utility patent titled: lightning protection cable for communication base station and patent number: 201320382810.9, although the implementation example 2 has achieved the purpose of the invention, there are still the following main defects: when the voltage is high, the internal protection The sleeve may be broken down, and the temperature of the electrical unit in the cable core can easily reach or exceed 200°C due to overload or lightning strike. Because the storage and working environment temperature of the optical fiber is usually less than 100°C, the optical fiber communication is interrupted after the high voltage test , therefore, in formal use occasions, if lightning breaks through the sheath, this phenomenon may also occur

Images