Device for locally freezing water-filled pipelines such as heating lines, branched lines and sanitary lines comprises a supporting collar assigned to nozzle openings to be supported on the pipeline on two sites parallel to each other

摘要

Device for locally freezing water-filled pipelines (1) such as heating lines, branched lines and sanitary lines comprises a supporting collar (24d) assigned to nozzle openings to be supported on the pipeline on two sites (31) parallel to each other and closing a hollow chamber. A nozzle opens into the base of the hollow chamber from which liquid carbon dioxide flows at a right angle to the tubular axis in two opposing directions. Gaseous carbon dioxide is removed from a cold collar (2). Preferred Features: Two gaps are formed between the supporting collar and the surface of the pipeline for removing the carbon dioxide.