The utility model provides an ultrasonic thickness measuring device for a low-pressure circulating
barrel. The ultrasonic thickness measuring device comprises an arc-shaped frame which is separably attached to the outer side of the low-pressure circulating
barrel, an ultrasonic thickness measuring mechanism which is arranged on the arc-shaped frame in a sliding mode, and a
handle which is connected with the arc-shaped frame. The ultrasonic thickness measuring mechanism comprises a driving
assembly arranged on the arc-shaped frame in a sliding mode, a clamping
assembly connected with the driving
assembly, and an ultrasonic thickness gauge detachably connected with the clamping assembly. According to the ultrasonic thickness measuring device for the low-pressure circulating
barrel, the arc-shaped frame is attracted and fixed to the outer side of the low-pressure circulating barrel through the
magnet, the clamping assembly is driven by the driving assembly to move to the measuring position along the arc-shaped frame, and the fixing barrel is driven by the electric push rod to move; therefore, the probe of the ultrasonic thickness gauge is attached to the outer wall of the low-pressure circulating barrel to detect the thickness, multi-point thickness detection of the low-pressure circulating barrel is
safer, more reliable, more convenient and faster, and the detection efficiency of the low-pressure circulating barrel is improved.