Device for monitoring the diameter of pipes

摘要

Device for monitoring pipes including a support connected to a traction cable and provided with several arms radially pivoting around the support, a means on the support for measuring the degree of tightening of the branches during movement of the support in the pipe 2 to be monitored. Device characterised in that the means provided on the support consists of a moving part freely sliding on the support against the action of a spring, this moving part being connected to the pivoting arms and acting on a means converting into an electrical quantity at each instant the momentary position of the moving part on the support during the movement of the support by traction on the cable. <IMAGE>