Expanding plate type multifunctional detector

The utility model discloses an expanding plate type multifunctional detector, which relates to the technical field of detection and comprises a plate type detector, and hydraulic push rods are mounted on the left side and the right side of the upper end of the plate type detector. When a hydraulic push rod and a gas collecting opening need to be shrunk, a rotary reset spring can drive a limiting ring to rotate in the reverse direction, so that the gas collecting shaft is driven to rotate, the gas conveying hose is tensioned, the gas conveying hose pulls a pipe collecting shaft to rotate, and winding of the gas conveying hose is loosened; and the loosened gas conveying hose can be wound and retracted between the two limiting rings of the pipe retracting shaft again through rotation of the pipe retracting shaft, so that when the length of the hydraulic push rod and the length of the gas retracting opening are reduced, the gas conveying hose can be better wound on the pipe retracting shaft again, and the gas con