Threaded plug-in sound test pipe

The utility model discloses a threaded plug-in sound test pipe which comprises a bottom pipe, a middle pipe and a top pipe, wherein the bottom pipe and the top pipe are sleeved in two ports of the middle pipe. The sound test pipe is characterized in that the bottom of the bottom pipe is sealed by electric welding, and a loop with a thread is arranged on the periphery of a pipe body at the open end of the bottom pipe; one end of the top pipe is sleeved in the middle pipe and welded and fixed integrally with the middle pipe; one port of the middle pipe is a threaded pipe orifice, and a matched threaded pipe sleeve is arranged on the threaded pipe orifice; and the top pipe is in threaded connection with the bottom pipe through the threaded pipe sleeve and sealed and fixed. A pile foundation ultrasonic detecting passage is adopted in the threaded plug-in sound test pipe, loosening and seepage are effectively prevented through a threaded fixing locking sealant ring, and the sound test pipe is simple in overall str