JP2007059183A - Pipe integrated electric heating cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of conventional pipe integrated heating cable that only partial heating can be obtained, flexibility is not enough, usage is limited because it can not be cut in free length, safety at contact part of heating body and conduction wire is insufficient when the cable is bent, and generates electromagnetic wave from the conduction wire. <P>SOLUTION: On the pipe integrated heating cable, liquid and fluid changing their viscosity in accordance with freeze prevention and temperature change can be maintained, heated, and supplied at a prescribed temperature through an internally arranged pipe 5. When bending the electric heating cable, close adhering property with the heating element 3 is strengthened by a mesh-shaped electric conduction wire B4 and an electric conduction wire A2. Furthermore, when current is supplied through the electric wire A2 and the electric wire B4, the generated electromagnetic wave is compensated with the electric wire A2 and the electric wire B4 as a coaxial core structure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a pipe-integrated electric heating cable that has a flexible and waterproof structure that can supply and distribute liquid and fluid whose viscosity changes due to freezing prevention and temperature change through an internal pipe 5 and that does not generate electromagnetic waves. .

Conventional heating of pipes that maintain the viscosity of liquids and fluids by preventing freezing and changing temperature has a structure in which a nichrome wire heater is embedded in a ceramic tube or various heaters are mounted in the inner and outer spaces of a resin tube. (For example, see Patent Documents 1, 2, and 3.)
Japanese Patent Publication No. 10-9255 Japanese Patent Publication No. 2002-26479 Japanese Patent Publication No. 2005-147464

The conventional pipe-integrated electric heating cable described above can only be partially heated, lacks flexibility, and cannot be cut freely in length. In addition, when the electric heating cable is bent, there is a weak point in which the contact portion between the heating element and the conducting wire lacks safety, and there is a problem that electromagnetic waves are emitted by the conducting wire.

The present invention is intended to solve the problems of such a conventional configuration, and the liquid and fluid whose viscosity changes due to freezing prevention and temperature change are supplied through the internal pipe 5 at a constant temperature. The object is to realize a flexible pipe-integrated electric heating cable that is flexible and waterproof and that does not generate electromagnetic waves.

In the pipe-integrated electric heating cable of the present invention, the energization B4 is applied substantially concentrically to the entire outer periphery of the flexible heat-resistant resin tube 5 (for example, polyimide resin), and the entire outer periphery is flexible with a uniform thickness. The heating element 3 (for example, a self-temperature control type PTC heating element) having a substantially uniform core is coated uniformly, and the entire outer periphery of the heating element 3 is coated with a substantially concentric core. The outer cover 1 was covered.

A second solution is to generate heat by applying a conductive wire B4 made of a mesh-like conductive material having a low internal resistance on the inner peripheral surface of the heating element 3 formed in a substantially cylindrical shape and a conductive wire A2 made of the same material on the outer peripheral surface. The electrode 3 of the body 3 was used.

In the third solution, the conducting wire A2 and the conducting wire B4 have a concentric shaft structure.

The effects of the first solving means are as follows. That is, the liquid and fluid whose viscosity changes due to freezing prevention and temperature change can be maintained and heated at a constant temperature through the internal pipe 5 and distributed.

The effect of the second solution means that the adhesion between the conducting wire B4, the conducting wire A2 and the heating element 3 is strengthened when the electric heating cable is bent.

The effect of the third solving means cancels electromagnetic waves generated when the energization line A2 and the energization line B4 are energized.

As described above, the pipe-integrated electric heating cable of the present invention is effective in preventing the freezing and maintaining and heating the liquid and fluid whose viscosity changes due to temperature change at a constant temperature.

When the electric heating cable is bent, the adhesiveness between the conductive wire B4, the conductive wire A2 and the heating element 3 is strengthened, and there is a safety effect during construction and operation of the electric heating cable.

When the energization line A2 and the energization line B4 are energized, there is an effect of canceling out electromagnetic waves generated by the energization line A2 and the energization line B4.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1A shows a partial perspective view of a single tube cable. FIG. 1-B shows a partial perspective view and a partial enlarged view of a multi-tube cable. 1A and 1B, a conductive wire B4 is applied to the entire outer periphery of the flexible heat-resistant resin pipe 5, and the entire outer periphery is coated with a flexible heating element 3 with a uniform thickness. The entire outer peripheral portion is covered with the energizing mesh wire A2, and the outer periphery 1 is covered with a jacket 1 having a high electrical insulation strength with a flexible heat-resistant resin.

A is a partial structural perspective view of a pipe-integrated electric heating cable of an electric heating cable using a single pipe 5. FIG. B is a partial structural perspective view and a partial enlarged view of a pipe-integrated electric heating cable of an electric heating cable using the composite pipe 5. A perspective view and an enlarged cross-sectional view in which a current-carrying mesh line B4 is mounted on the outer periphery of the tube 5. The perspective view and expanded sectional view which attached the heat generating body 3 to the outer periphery of the mesh wire B4 for electricity supply. The perspective view and enlarged sectional view in which energization mesh line A2 was attached to the perimeter of heat generating element 3. [Explanation of Symbols] 1 Jacket 2 Mesh-shaped conducting wire A3 Heating element 4 Mesh-shaped conducting wire B5 Tube

Claims (3)

A flexible heat-resistant resin single tube or a plurality of tubes (hereinafter referred to as “tube 5”) is equipped with a mesh wire B for energization (hereinafter referred to as “conductive wire B4”) on the entire outer periphery, and the entire outer periphery is provided with a uniform thickness and flexibility. The heating element (hereinafter referred to as heating element 3) having the outer periphery, and the outer periphery of the heating element (hereinafter referred to as the heating line A2) is covered, and the outer periphery is covered with the outer cover 1. cable. An electrode B of the heating element 3 is formed by applying an energization B4 of an energizing material having a low internal resistance to the inner peripheral surface of the heating element 3 formed in a substantially cylindrical shape according to claim 1 and an energizing wire A2 of the same material on the outer peripheral surface. An electric heating cable with a strong structure as a part. 3. An electric heating cable having a structure that cancels out electromagnetic waves generated when the conducting wire A2 and the conducting wire B4 are energized to the conducting wire A2 and the conducting wire B4 by the concentric shaft structure.

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