Medium-voltage hoisting cable for super high-rise building and production installation process thereof

Abstract

The invention discloses a medium-voltage hoisting cable for a super high-rise building and a production installation process thereof. The cable comprises three insulated wire cores, three filling strips, a reinforced layer and an outer sheath layer; the three insulated wire cores are pairwise tangent; an included angle of extension lines of circle centers of the adjacent insulated line cores is 120 degrees; each of the filling strips consists of a composite reinforced core located in the center and a filling body coated at the outside of the composite reinforced core; the composite reinforcedcores are located in the center of the filling body; the included angle of a center line of the three composite reinforced cores is 120 degrees; and a cross-section shape of the filling body is the same as that of a gap between two adjacent insulated line cores and the reinforced layer. According to the cable disclosed by the invention, the composite cores are adopted as bearing cores and are disposed in the filling strips, the tensile resistance of the cable can be greatly improved, the hoisting safety margin of the hoisting cable is improved, the cable weight is light, the periphery of the cable is fixed without a steel wire, and the construction difficulty is low.

Description

technical field [0001] The invention relates to the field of cables, in particular to a medium-voltage hoisting cable for super high-rise buildings and a production process thereof. Background technique [0002] According to the standard of the Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China "General Rules for Design of Civil Buildings" JGJ 37-87 (Trial) Article 1.0.5 The division of civil building height and number of floors: when the building height exceeds 100m, regardless of residential or public buildings All are super high-rise. The backbone cables in super high-rise buildings are laid vertically, and the cables usually weigh 5 to 8 tons, which requires the cables to have high tensile strength. [0003] Existing hoisting cables all adopt steel wire armored cables, and steel wire armoring is arranged on the outer periphery of the inner cushion layer after three cable cores are twisted into cables, so that the cabl...

AI Technical Summary

Problems solved by technology

The structure of the cable, firstly, the weight of the cable is heavy; secondly, it is difficult to fix the outer peripheral steel wire, and the construction is difficult; thirdly, the heat dissipation of the cable is difficult, and the ampacity is small, and the ampacity of the armored cable with the same cross section is lower than that of the unarmoured cable. 30%, which increases the cost of the cable; fourth, the outer diameter of the armored cable is larger, which increases the amount of cable material, which also leads to an increase in the cost of the cable; fifth, the backbone cable adopts a rated voltage of 6 / 10~8.7 / 10kV XLPE insulated vertical The hoisting and laying of cables is constrained by the building structure, and there are repeated alternations of horizontal laying and vertical laying. If steel wire armored hoisting cables are used, transfer cabinets or joints must be installed at the junction of the horizontal plane and the vertical well. rate, while increasing the workload of cable laying

[0004] The applicant has developed a pendant cable according to the problems existing in the aforementioned prior art. This cable uses steel wire as the reinforcing core. The cables are twisted together, which increases the outer diameter of the bundled cables and increases the space of the shaft; 2. The cables are still reinforced with steel wires, which increases the weight of the cable body; 3. The connection between the spreader and the cable body adopts the pouring method, and the process is relatively complicated and difficult. control

Images