Radial cutting torch with mixing cavity and method

E - Fixed Constructions – 21 – B

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E21B 29/02 (2006.01) B23K 7/00 (2006.01)

Patent

CA 2427233

An apparatus is provided which is adapted to be located in a conduit to be severed. The apparatus includes an upper ignition device, combustible material and a lower nozzle with a diverter. In operation the ignition device is actuated to ignite the combustible material to form a flame of hot gases for passage through apertures of the nozzle to the diverter which directs the hot gases radially outward and against the conduit to be severed. A uniform mixing cavity is provided above the nozzle in the flow path of the flame to the nozzle for mixing the hot gases prior to passages through the nozzle. A lower cavity is provided for the hot gases flowing out of the nozzle for pressurizing the hot gases at the outlet of the apparatus.

Est présenté un appareil qui est adapté pour être placé dans un conduit à sectionner. L'appareil comprend un dispositif allumeur supérieur, un combustible et une buse inférieure avec déflecteur. Pendant l'utilisation, le dispositif d'allumage est actionné pour enflammer le combustible de manière à générer une flamme de gaz chauds qui doit passer dans les ouvertures de la buse jusqu'au déflecteur qui dirige les gaz chauds radialement vers l'extérieur et contre la conduite à sectionner. Un mélangeur uniforme se trouve au-dessus de la buse dans la trajectoire d'écoulement de la flamme vers la buse et sert à mélanger les gaz chauds avant leur passage dans la buse. Une cavité inférieure est prévue pour les gaz chauds sortant de la buse afin de mettre ces gaz chauds sous pression à la sortie de l'appareil.

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