Lance for removing deposits adhering to the tube sheet of a steam generator

摘要

The invention relates to a lance for removing deposits adhering to the tube sheet of a steam generator, comprising a flexible strip which is introducing into intermediate tube areas of the steam generator, which has a cleaning head at the free end of the strip, and which comprises at least one water hose that is used to supply a flow of water to the cleaning head. In a use situation, the cleaning head comprises a working face which faces the tube sheet or deposits present thereon, an outlet opening which is fluidically connected to the water hose and opens into the working face, and a mechanical tool which acts on the deposits and removes material.

主权项

1. A lance for removing deposits adhering to a tube sheet of a steam generator comprising: a flexible strip sized to be introduced into intermediate spacers between tubes of the steam generator, bears a cleaning head at a free end thereof and comprises at least one water hose for supplying a flow of water to the cleaning head, wherein the cleaning head comprises a working side which, in the use situation, faces the tube sheet or deposits present thereon, an outlet opening which is fluidically connected to the water hose and opens into the working side and a mechanical tool which acts on the deposits and removes material;
wherein:
the lance is characterized by a moveable tool driven by a drive; andthe tool is driven directly by the flow of water or indirectly driven by the flow of water.