Pipeline accompanying-heat cable

Abstract

The invention is concerned with the grounding pole piping heating cable, relating to the field of carbon fiber heating cable with carbon fiber, carbon fiber insulation coating and outer insulation coating. The carbon fiber is inside of carbon fiber insulation coating which is in the outer insulation coating, and the outside of the latter is lubrication coating. For binding with carbon fiber heating cable or carbon fiber electric heating cable, piping will elongate for thermal expansion, and the lubricating oil film with small friction coefficient of the heating cable forms the oily sliding friction effect, and the glue of the adhesive tape cannot work with natural conglutination effect for the oil film to solve the problem of local or whole snap. This invention is with high safety factor and long service life.

Description

technical field [0001] The invention relates to the technical field of carbon fiber heating cables. Background technique [0002] Carbon fiber is used as the electric heating material, and the outer layer is made of plastic or rubber as the insulating material to produce a carbon fiber heating cable. If metal wires are placed side by side with the carbon fiber, a carbon fiber electric heating cable can also be produced. Usually, various types of heating cables can be used. Carbon fiber heating cables or carbon fiber electric heating cables are bound to pipes with sticky adhesive tape paper or strip materials without glue. These products are widely used in the antifreeze and heat preservation of various pipes, including various plastic pipes. Since the coefficient of thermal expansion and contraction of plastic pipes is usually relatively large, while the coefficient of thermal expansion and contraction of carbon fiber heating cables or carbon fiber electric heating cables is...

AI Technical Summary

Problems solved by technology

Since the coefficient of thermal expansion and contraction of plastic pipes is usually relatively large, while the coefficient of thermal expansion and contraction of carbon fiber heating cables or carbon fiber electric heating cables is relatively small, the coefficients of thermal expansion and contraction between the two are not the same or not synchronized, so, in During the normal working process, the plastic pipe expands and elongates due to heat. When the plastic pipe elongates, it will generate tension on the carbon fiber heating cable or carbon fiber electric heating cable bound to the pipe. When this tension When acting on carbon fiber heating cables or carbon fiber electric heating cables for a long time, it may cause fatigue partial or complete fracture of carbon fiber or metal conductors, resulting in: (1) local resistivity due to partial fracture of carbon fibers When it is energized, it will form a hot spot where the temperature rises abnormally, and it will cause a fire in severe cases; (2) The conductors of the metal wires in the carbon fiber electric heating cable are all broken, resulting in a failure of no power, which affects the normal use of the product

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