Wall thickness measuring device for pipes, cable sleeves and the like, in particular extruded plastic ones

摘要

The invention relates to a wall thickness measuring device for pipes and the like, more particularly of extruded plastics, having a measuring head (15) connected to measuring and supply leads. The measuring head is mounted to be reversed around an opening of passage A for the pipe to be measured by means of a guide (14) attached to a frame having the opening of passage. The measure and supply leads (22-25) are acommodated in two guide chains (20, 21) which extend in opposite directions, partly on an inner guideway (18) and the other part on a guideway (19), connected thereto, of a guide core member (17). The guide core member (17) is basically constructed in the form of a portion of a circle and is disposed concentrically of the opening of passage (5) and can be moved therearound. Ends (26, 27) of the part of the guide chains (20, 21) disposed on the outer guideway (19) are coupled to a fixed point of the guide (14), the ends (28, 29) of the parts of the guide chains (20, 21) disposed on the inner guideway (18) being coupled to the movable measuring head (15).