| 摘要 |
<p>The invention relates to a receiving device of an electromagnetically operating unit for determining foreign fractions in the material flow of a tubular delivery system, wherein a non-metal tube section (8) is surrounded by spools (5, 6, 5') in the delivery path (1, 3) of the tubular delivery system, wherein said spools are used to detect the field changes caused by foreign fractions in the delivery product flow and feed them to an evaluation circuit (7), and wherein furthermore said non-metal tube section (8) is enclosed by a metal shield housing (4), which transitions into the continuing metal transport tubes (3, 3') of the tubular delivery system, and wherein furthermore the shield housing (4) surrounding the non-metal tube section (8) and the spools (5, 6, 5') can be electrically insulated against the continuing metal transport tubes (3, 3') for the delivery product. Metal tube flanges (10), having a planar contact surface against the shield housing, are attached in an electrically insulating manner to both end plates (4') of the shield housing (4) enclosing the spools, with the interposition of an intermediate layer of a thin insulating material (9), and the thereby insulated shield housing (4) is connected to the ground point of the evaluation circuit (7) in an electrically conductive manner.</p> |
