The invention belongs to instruments, and discloses a corrugated
pipe damage detecting instrument. The corrugated
pipe damage detecting instrument is characterized in that the corrugated
pipe damage detecting instrument is composed of a shell, a
piston, a
piston rod with a shaft shoulder, a corrugated pipe, a spiral spring and a capping plug. The shell is provided with a step hole penetrating through the two ends of the shell, and one end of the step hole is a neck part in threaded connection with a drainage guide hole in the valve
deck of a corrugated pipe valve. The capping plug seals the
piston, the
piston rod, the corrugated pipe and the spiral spring in the step hole, the piston and the corrugated pipe are arranged on the rod body on the two sides of the shaft shoulder of the
piston rod respectively in a sleeved mode, one end of the corrugated pipe is in sealing
welding with the shaft shoulder, and the other end is in sealing
welding with the end surface of the capping plug. The spiral spring is arranged on the periphery of the corrugated pipe in a sleeved mode, the two ends of the spiral spring abut against the piston and the end face of the capping plug respectively, and the
tail end of the
piston rod is flush with the outer end face of the capping plug or extends outwards for a certain length L1. The effects that the breakage of a valve corrugated pipe can be found out in time at an early stage without dismounting and media leakage is prevented from endangering the
human body safety and the property safety in a detection process are achieved.