Electro-fusion fitting

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 47/02 (2006.01) B29C 65/36 (2006.01) F16L 47/03 (2006.01)

Patent

CA 2056373

An electro-fusion fitting includes a body which is provided with a heater including a magnetic alloy unit having a predetermined Curie temperature in the vicinity of a joint surface thereof in a manner that a surface of the heater is exposed on the joint surface. The joint surface of the body is brought into contact with a joint surface of a member to be coupled and, if a high-frequency current is applied to the magnetic alloy unit by electromagnetic induction, the magnetic alloy unit generates heat, and a temperature of the magnetic alloy unit is kept at the predetermined Curie temperature due to a temperature self-control function thereof. Therefore, if the Curie temperature is set at a fusion temperature, the joint surfaces of the body and the member to be coupled are coupled to each other.

Un appareil d'électrofusion comprend un corps qui est muni d'un dispositif de chauffage comportant un élément en alliage magnétique ayant un point de Curie prédéterminé au voisinage d'une surface de joint de manière qu'une surface du dispositif de chauffage est exposée à la surface de joint. La surface de joint du corps est mise en contact avec une surface de joint d'un élément à assembler et, si l'on applique un courant haute-fréquence à l'élément en alliage magnétique par induction électromagnétique, l'élément en alliage magnétique produit de la chaleur, et la température de l'élément en alliage magnétique est maintenue au point de Curie prédéterminé grâce à une fonction d'auto-contrôle de la température. Par conséquent, si le point de Curie est réglé à une température de fusion, les surfaces de joint du corps et l'élément à assembler sont rendus solidaires.

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