The utility model discloses a negative
pressure pipe tightness testing device capable of quickly closing two ends, which comprises a
liquid storage tank, a feeding and discharging mechanism arranged in the middle of the bottom of the upper end of a mounting frame arranged at the upper end of the
liquid storage tank, a lifting screen plate arranged at the upper end in a
liquid storage cavity formed in the front side of the
liquid storage tank, and placing seats symmetrically arranged on two sides of the middle of the upper end of the lifting screen plate. An electric push rod is arranged in the middle of a side plate arranged in the middle of the outer side of the placing base, and the output end of the electric push rod is connected with an elastic sealing piece. According to the negative
pressure pipe sealing degree testing device capable of rapidly sealing the two ends, by arranging the feeding and discharging mechanism, automatic feeding and discharging of a negative
pressure pipe are achieved, manual intervention is not needed, the feeding efficiency is greatly improved, the labor intensity is reduced, meanwhile, errors and unstable factors caused by manual operation are avoided, and the working efficiency is improved. And meanwhile, a lifting net plate, a guide self-locking sliding rail, an electric telescopic rod and a positioning seat are matched, so that the sealed negative pressure
pipe can be conveniently conveyed into liquid for testing, and the practicability and the
automation of use are improved.