Rubber sleeve detection unit and rubber sleeve detection device

The utility model relates to a rubber sleeve detection unit and a rubber sleeve detection device. The rubber sleeve detection unit comprises a central rod which extends along an up-down direction; the sleeve is arranged on the central rod in a sleeving manner, and the lower end of the sleeve is in jacking fit with the upper end of the rubber sleeve assembly; the setting nut is in threaded connection with the upper part of the central rod and is supported on the sleeve; the locking nut is in threaded connection with the upper part of the sleeve and is in jacking fit with the setting nut, so that the central rod and the sleeve are fixed together; the pushing structure is arranged at the lower part of the central rod and is used for pushing the lower end of the rubber sleeve assembly when the central rod moves upwards relative to the sleeve; the piston is arranged at the upper end of the central rod, and a sealing ring cavity is defined between the central rod and the sleeve and below the ...