Rock sample extraction device

A rock sample extraction device, comprising

• a downhole plate (1) and a plurality of sampling components (2) uniformly arranged on the downhole plate (1), wherein the sampling components (2) are used for sampling rock samples in well areas with different depths, and each sampling component (2) is used for sampling at upper and lower ends of a same well area;
• wherein, each of the sampling components (2) comprises anisotropic extraction cylinders (21) arranged on the downhole plate (1), and a power member (22), and wherein the power member (22) drives the anisotropic extraction cylinders (21) to perform telescopic movement in opposite directions, so that the anisotropic extraction cylinders (21) carry out sampling operations when extending outwards;
• wherein, for each of the sampling components (2),
• the anisotropic extraction cylinders (21) comprise a first extraction cylinder (211) and a second extraction cylinder (212) which are arranged at a relatively upper position and relatively lower position, respectively, wherein the power member (22) is arranged between the first extraction cylinder (211) and the second extraction cylinder (212);
• the downhole plate (1) is provided with a buckling plate (213) for supporting the first extraction cylinder (211) and a buckling plate (213) for supporting the second extraction cylinder (212);
• the first extraction cylinder (211) and the second extraction cylinder (212) are movably installed in the respective buckling plates (213) and can move freely along a length direction of the respective buckling plate (213);
• the power member (22) comprises a servo motor (221) installed on the downhole plate (1) and a rotating panel (222) arranged on an output shaft of the servo motor (221);
• a surface of the rotating panel (222) is fixedly provided with two pull rods (223);
• when the servo motor (221) rotates, the pull rods (223) are used to drive the first extraction cylinder (211) and the second extraction cylinder (212) to perform rotary telescopic movement along the length direction of the respective buckling plates (213);
• and
• the pull rods (223) are each provided with a respective tongue-shaped slot (224), and the first extraction cylinder (211) and the second extraction cylinder (212) are respectively provided with limit protrusions (7);
• the pull rods (223) drive the first extraction cylinder (211) and the second extraction cylinder (212) to do telescopic movement in the respective buckling plates (213) by using a limiting effect of the respective tongue-shaped slots (224) and the limit protrusions (7) when the rotating panel (222) makes circular movement.