Floating cable

Abstract

A floadting cable includes a conductor coated with the insulated sheath, an inner sheath and an outer sheath, wherein the inner sheath is made of the thermoplastic elastomer coated on the insulation sheath of the conductor; the outer sheath is made of the mixtures of the thermoplastic elastomer, the foaming agent and the lubricant, which are coated on the outside of the inner sheath in definite amounts by weight after being mixed to form the foaming layer, and foaming micropores are formed in the foaming layer. The cable has the advantages of floating on the water because the global density of the cable is smaller than 1, which is convenient to maintain; providing with excellent global density and the frequent bending tolerance; mixing the foaming agent into the outer sheath, wherein airtight foaming micropores are formed in the outer sheath to constitute the foaming layer in the extruding process; the foaming layer adopts the conventional extruding device in the cable industry to coat on the outside of the inner sheath, which not only leads the inner structure of the floating cable with simple structure, but also is convenient to process with high production efficiency, which is suitable for the industrialization volume production.

Description

technical field [0001] The invention relates to a floating cable, which is suitable for power transmission in water operations. Background technique [0002] In the prior art, common water-blocking cables are used as cables for power transmission in most water operation equipment, and their weight is relatively heavy, and they all sink to the bottom of the water with the equipment during use. This kind of water-blocking cables is extremely easy to Scratching with hard objects on the seabed or river bed will cause damage to the cable, thereby reducing the service life of the cable; in addition, this kind of cable is not suitable for use in water operations because it is prone to knotting and entanglement when retracting and unwinding. Cables that are often retracted. [0003] In response to the above problems, some domestic cable manufacturers have also developed cables that can float on the water. Usually, these floating cables are filled with foam materials or a piece of f...

AI Technical Summary

Problems solved by technology

The problem solved by this patent solution is: light weight, can float on the water surface and is suitable for cables that need to be retracted frequently

But the disadvantages are: because the foamed polyethylene material is filled inside the cable, the structure is complex, the processing is difficult, the production efficiency is low, and the disadvantages of industrial production cannot be realized.

However, the applicant believes that the floating cable recommended by the above-mentioned patent has the following deficiencies and is not suitable for use as a power transmission carrier in operations such as submarine drilling, submarine natural gas survey, marine rescue, salvage, and scientific research.

One of its deficiencies is that it is difficult to meet the flexible requirements that the cable should have that is frequently bent and not easy to cause damage, because it is difficult to resist frequent bending with only a layer of outer sheath outside the conductive core; Although moving between the floating core and the outer sheath is helpful for the heat dissipation of the conductive wire core, it is objectively unfavorable for the protection of the conductive wire core. Once the outer sheath is damaged, the conductive wire core will be affected, and because the cable The application occasion or the environment is in sea water, so the temperature rise of the cable is not the focus of the problem; third, the water resistance effect is very fragile, once the sea water penetrates into the outer sheath, the function of the conductive core will be paralyzed state; fourth, the setting of the floating core also increases the difficulty of cable production, resulting in extremely low efficiency of cable production

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