Piping structure of heating/heat-retaining tube

Abstract

A piping structure of a tube for heating or heat-retaining of fluid such as gas and liquid includes a conduit through which fluid is transported and a plurality of heater lines inserted into the conduit, in which the heater lines are connected in parallel. The piping structure is capable of transporting fluid over a long distance while heating the fluid or keeping the temperature of the heated fluid constant even when the total piping length is long.

Description

BACKGROUND OF INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a piping structure of a tube for heating or heat-retaining of fluid such as gas and liquid which flows in the tube.[0003]2. Description of the Related Art[0004]As a conventional piping structure of a tube for heating or heat-retaining of fluid flowing in the tube, such a piping structure, for example, as shown in FIG. 7, has been known. The piping structure includes a conduit 90 through which the fluid F is transported, a heater line HL inserted into the conduit 90, and lead wires LW which are electrically connected to the power supply for transmitting power to the heater line HL at both ends of the conduit 90, so that the fluid in the conduit 90 is heated to a predetermined temperature while the fluid is transported from a tank T1 positioned in a higher position to a tank T2 positioned in a lower position (for example, Japanese Patent Application Laid-Open (kokai) No. 2005-351333).[0005]How...

AI Technical Summary

Benefits of technology

"The present invention provides a piping structure of a tube that can transport fluid over a long distance while heating or keeping the fluid temperature constant, even if the total piping length is long. The piping structure includes a conduit through which fluid is transported and a plurality of heater lines inserted into the conduit, which are connected in parallel. The piping structure may also include at least one tube joint where multiple conduits are connected with each other, and lead wires for transmitting power to the heater lines are connected to the heater lines through the tube joint. The heater line may also be extended to the tube joint or to the following conduit through the tube joint. The piping structure may also include at least one heater line with a different heat value."

Problems solved by technology

Therefore, since the resistance value becomes higher as the total length of the heater line gets longer, when the power supply voltage is constant, the electric current value and, by extension, the heating value are reduced, in turn leading to the decrease in the efficiency of heating or heat-retaining of the gas or liquid flowing in the tube.

As a result, the conventional piping structure of the tube has a difficulty in transporting fluid over a long distance while heating the fluid or keeping the temperature of the heated fluid constant.

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