Patent DE-102010013472-A1 (DE)
Title: Seam monitoring device for inseam plane in high frequency-welding pipe systems for monitoring pipe seam of a longitudinal production pipe, comprises measuring body connected with the inseam plane, a scanning tool, and electronic processor
Inventor: BLISSENBACH ERNST
IPC: B21C37/08
Filed: 2010-03-30
Abstract: The device for inseam plane in high frequency-welding pipe systems for monitoring pipe seam of a longitudinal production pipe (8), comprises measuring body connected with the inseam plane, a scanning tool (11) that is movably stored with a pressure force, an electrical transducer that is operatively connected with the scanning tool, where the transducer produces an electrical signal corresponding to the movement of the scanning tool, an electronic processor integrated into the measuring body, where the electronic processor is connected with the transducer. The device for inseam plane in high frequency-welding pipe systems for monitoring pipe seam of a longitudinal production pipe (8), comprises measuring body connected with the inseam plane, a scanning tool (11) that is movably stored with a pressure force, an electrical transducer that is operatively connected with the scanning tool, where the transducer produces an electrical signal corresponding to the movement of the scanning tool, an electronic processor integrated into the measuring body, where the electronic processor is connected with the transducer for evaluating the electric signal, and an external display unit, visual and/or acoustic display means and/or a spray marking device for applying a mark at the outside of the production pipe. The scanning tool comprises a rotatable measuring roller (14), whose surface has a spherical profile, which corresponds to the target-contour of the pipe inseam and peripheral surface of a helically running web is formed that scans the pipe inseam radically, and is stored by scanning lever pivoting on a swivel axis rotatable into the measuring body and a measuring spring is formed as plate spring, where the measuring spring is connected at an end with the swivel axis and supported itself at its other end of a spring axis stored in the measuring body toward the pipe inseam to be pressurized. The electrical transducer consists of a strain gauge, which is applied on the measuring spring. The device comprises a locking lever (28) that allows at the end in the measuring body and the pressure force of a catch-spring, where the locking lever adjoins at its other free end with an oblique contact surface (31) against the spring axis with the pressure force, a measuring lever, which is mounted on the swivel axis so that it prevents an increase of a voltage of the measuring spring with an excess stroke of the scanning tool having a measuring leverage present at its free end of a displacement of the spring axis and a swivel of the locking lever causes against the pressure force of the locking lever, and layer-adjustable measuring lever stroke for adjusting the preload position of the scanning tool by the measuring lever and a layer-adjustable spring axis stroke for adjusting bias of the measuring spring, where the spring axis is movably stored into the measuring body. The excess stroke spring is connected itself at the end with the measuring body and at the other end with a spring bolt, which is connected with the spring axis so that the excess stroke spring of the spring axis pulls over the spring bolt against the spring axis stroke. A conduction path of the power supply and the transducer and a signal transmission to the display unit are implemented by protected single-wire conduction and metallic parts. The device comprises a mechanical coupling of the measuring body for connecting the measuring body with the holder of the inseam plane. The measuring body comprises cooling water holes for the supply of cooling water to purify the measuring body and cooling the scan- and measuring mechanism and the scanning tool. An independent claim is included for a method for monitoring pipe inseam processing with an inseam plane by high frequency welded pipe.