Double-acting hydraulic telescopic mechanism of static sounding device and working method

According to the double-acting hydraulic telescopic mechanism of the static sounding device and the working method, movement of the piston in the double-acting hydraulic telescopic mechanism is achieved through the two flow channels located in the cylinder wall, and hydraulic oil injected from the first flow channel can push the piston to move downwards; hydraulic oil injected from the second flow channel can push the piston to move upwards. Therefore, the piston rod can stretch out and draw back in the seabed hole, the defects that after each static sounding test of an underground double-acting piston hydraulic cylinder, in order to contract the piston rod, the double-acting piston hydraulic cylinder needs to be lifted out from the seabed hole, and the piston rod can be contracted by means of the pressure of a water pressure system are overcome, and the operation efficiency is improved. Meanwhile, the laser range finder is installed in the cable containing pipe, the working stroke of the piston can be direct