Flexible rubber jacketed cable for shield tunneling machine

Abstract

The invention discloses a flexible rubber jacketed cable for a shield tunneling machine, and belongs to the technical field of wires and cables. The flexible rubber jacketed cable for the shield tunneling machine comprises a cable core, an inner protective jacket extruded outside the cable core, a reinforcing layer knitted on the inner protective jacket and an outer protective jacket extruded outside the reinforcing layer. The cable core is formed by three insulating wire cores and a center reinforcing core in a cabling mode. Each insulating wire core is sequentially formed by a conductor, a conductor shielding layer, an insulating layer, an insulation shielding layer and a weaving layer from inside to outside, wherein each weaving layer is formed by mixing metal wires and fibers. According to the flexible rubber jacketed cable for the shield tunneling machine, the mainly supplied nominal voltage is 18 / 30 kV, and the requirements of the shield tunneling machine for the wires and cables in the using process can be met; the cable has the advantages of being small in bending radius, capable of being moved and twisted frequently, resistant to abrasion and oil, flexible, tensile, resistant to tear, resistant to low temperatures and the like; the service life of the cable is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of wires and cables, in particular to a rubber-sheathed flexible cable for a shield machine. Background technique [0002] At present, my country has become the world's largest manufacturing base and application market for shield machines and roadheaders. With the high-speed growth of domestic urban road transportation, railways, highways, water conservancy, municipal engineering and other construction projects, my country's excavation machinery has also ushered in rapid development. my country's excavation machinery industry has become a key supporting development industry for domestic high-end equipment manufacturing and strategic emerging industries. [0003] The cables used for supporting large-scale tunnel full-section excavation equipment such as shield machines and roadheaders are collectively referred to as shield machine cables. Because of the special working environment, the cables are required to...

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Problems solved by technology

[0004] In the past, rubber-sheathed flexible cables for shield machines mainly relied on imports. At present, many cable manufacturers have begun to develop and produce cables, but there are problems such as poor cable flexibility, low voltage level, and many faults.

[0005] China's utility model patent (patent application number: 201020022460.1) discloses a shield machine cable, but the highest voltage level is 8.7 / 15kV, which cannot meet the current voltage level requirements of all shield machines, and because the ground wire core is divided into 3 parts. In the gap between the power cores, the tensile capacity is weakened, which is easy to cause the problem of breaking the ground core. The use of low-strength rubber filling strips and cable wrapping tapes has a greater impact on the flexibility of the cable.

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