A DEVICE FOR MEASURING DISTANCE BETWEEN WALLS OF COAXIAL CYLINDRICAL SCREENS

摘要

A device for measuring distance between walls of coaxial cylindrical screens is provided. Rotation of motors is rotated to screw bars and rotation of the screw bars is converted to translational movement of gauge bars. The numbers of rotation of the screw bars corresponding to length of projection of the gauge bars from their withdrawn positions to positions at which they abut against wall surfaces of the screens are measured by rotary encoders and the distance between wall surfaces of the screens thereby is measured. A main body of the device is fixed between the wall surfaces of the screens by means of the projecting gauge bar and a pair of main body supporing units.