Highly flexible tow cable for port cranes

Abstract

The invention discloses a highly flexible towing cable for port cranes, which comprises a cable inner core and a sheath wrapped outside the cable inner core, the cable inner core includes a power core and a control core, and the power core From inside to outside, it is composed of power line conductor, power line GRPP tape layer and power line insulation layer. The control line core is composed of control line conductor, control line GRPP tape layer and control line insulation layer from inside to outside. The invention has strong mechanical properties such as tensile resistance, bending resistance, tear resistance and wear resistance. It is designed for high-strength mechanical requirements and frequent bending occasions. It has reliable electrical properties, salt spray resistance, low temperature resistance and weather resistance. Well, the cable has a long service life and stable performance.

Description

technical field [0001] The invention relates to a cable, in particular to a highly flexible tow cable for port cranes. Background technique [0002] Due to the frequent hoisting of port machinery, the supporting cables are in a high-frequency reciprocating bending state, which bears a lot of tension and bending. Due to the unreasonable material and structural design of domestic traditional cables, the cable core often breaks when the cable is bent or coiled. , Cracking and power failure, causing the port machinery to fail to operate normally. Due to the long-term use of cables in harsh outdoor environments, they are often exposed to the sun’s ultraviolet rays and the absolute temperature difference between day and night; the tow cables for port machinery located on the seaside also have to withstand the erosion of salt spray for a long time. When the cable insulation and sheath are subjected to high-frequency bending, internal fractures or external cracks will occur. And t...

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Problems solved by technology

[0003] At present, the high-flexible towing cables specially used in ports in China mainly rely on imports, but the cost of imported cables is too high; the ordinary cables currently used in the market are filled with glass fiber or hemp rope, no matter what kind of additional material is used for filling, It is easy to cause gaps between the insulated cores in the cable core, which makes the twisted core deformed during the stress process of the cable during port machinery operations. At the same time, due to the soft sheath, the core will protrude and cause the cable Unevenness generally has a very short service life cycle and high replacement frequency, which cannot meet the special requirements of port machinery and seriously affects the normal operation of ports and related places in our country

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