Multi-shaft pressurized rock mechanics tester

A multi-shaft pressurized rock mechanics tester, comprising a base (1);

• the base (1) is of an integral rectangular structure, and welded six vertical support plates (101) symmetrically at the front and back ends, a shaped bracket plate is horizontally welded at the top of the six vertical support plates (101) (“” is a Chinese character, read as “Ri”), and a bracket plate (4) is rotatably installed on the top section of the three rear vertical support plates (101), pressed against the -shaped bracket plate, and used to support the rock to be tested;
• the left and right sides of the base (1) are symmetrically welded with four vertical bracing plates (103), an I-shaped installation plate (105) is welded on the top of the four vertical bracing plates (103), four hydraulic cylinders (2) are locked, fixed and hoisted on the bottom of the I-shaped installation plate with screws, a square press plate (3) is locked, fixed and hoisted at the bottom of four piston shafts on the four hydraulic cylinders (2) with screws, and a jacking pillar (301) is welded and fixed at the bottom center of the square press plate (3) and slides down to contact the rock block to be tested;
• two of four vertical strip grooves are set respectively on the front and back ends of the vertical support plates (101), a positioning shaft (102) is welded in each of the four vertical strip grooves, and a rectangular fence frame (5) is mounted on the four positioning shafts (102) in a sliding way;
• two six-edge positioning shaft (106) are symmetrically welded on the middle section of the front and back vertical support plates (101) located in the middle position, two L-shaped inserts (6) are installed on the two six-edge positioning shafts (106) by pushing and sliding a first set of spring on the top;
• two -shaped foot frames (501) (“” a Chinese character, read as “Kan”) are symmetrically welded on the bottom of the left and right panels of the fence frame (5);
• a rotating shaft (401) is welded at the rear of the bracket plate (4) and two driven gears (402) are symmetrically sleeved on the left and right ends of the rotating shaft (401);
• two gear racks (503) are symmetrically welded in both sides on the top of the rear panel of fence frame (5) and will get engaged and contacted with the two driven gears (402) while the fence frame (5) slides down with interference;
• four F-shaped sliding bars (502) are symmetrically welded at the bottom of the front and rear panels of the fence frame (5), and four sliding sleeves are welded at the bottom of the four F-shaped sliding bars (502), and the four sliding sleeves are pushed by a second set of springs to slide with the four positioning shafts (102).