Drilling device used in preparation of main water pipe at new building, has slider that is integrally formed in guide tube, prior to drilling head in a state leading away laterally on guide tube for interrupting flow of water branch line

摘要

The drilling valve (3) has guide tube (7) for the connection to the main line (1). A rotatable cutting head (5) is provided in the guide tube in a state displaceable in longitudinal direction. A drive spindle (9) is provided for driving the cutting head. A slider (19) is integrally formed in guide tube, prior to the punching, cutting or drilling head in a state leading away laterally on the guide tube for interrupting the flow of water branch line.