Device for inspecting inner diameter and bending of pipe

A pipe inspection device for inspecting the inner diameter and bending of a pipe by forcing a gauge through the pipe from one end thereof to the other end under the driving force of fluid under pressure, said device comprising

• a fixed stopper means,
• pipe positioning means including a plurality of rollers, adjacent said stopper means which are driven to displace the pipe placed thereupon so as to bring the pipe into a predetermined position in which one end of the pipe is brought into engagement with said stopper means,
• carriage means including at least two carriages having a plurality of wheels and a pair of guide rails, said carriages being movable on said guide rails in either direction of the longitudinal axis of the pipe to be adjustable depending upon the length of the pipe,
• pipe clamping means for clamping securely the pipe in a predetermined inspection position, said pipe clamping means being mounted on said carriage means,
• shift means having at least one shift arm displaced transversely in a plane perpendicular to the longitudinal axis of the pipe on said pipe positioning means and cross feeding the pipe to said predetermined inspection position,
• a gauge placed on a gauge positioning means near one end of the pipe,
• gauge firing means including nozzle means for emitting fluid under pressure mounted for movement toward or away from one end of the pipe clamped by said clamping means on said carriage means,
• said nozzle means having such a longitudinal cross sectional configuration that when it moves toward said one end of the pipe, it may insert into the pipe said gauge placed on said gauge positioning means and when it is further moved, it may be brought into fluid-tight contact with said one end of the pipe, whereby the fluid under pressure may be admitted through said nozzle means behind said gauge in the pipe, thereby forcing said gauge through the pipe toward the other end thereof, and
• stopper plate means disposed adjacent to the other end of the pipe in said predetermined inspection position for stopping said gauge discharged out of the other end of the pipe and preventing further flying of said gauge beyond said stopper plate means.