Seepage and acoustic wave coupling system for rock tensile testing

A clamping triaxial seepage and acoustic coupling rock tensile testing machine, wherein the machine comprises a sample (6) and a scaffold-type tensile testing device (5);

• the scaffold-type tensile testing device (5) is provided with an upper chuck (101) and a lower chuck (102);
• the upper chuck (101) and the lower chuck (102) both comprise a connecting column (1) and a plurality of clamping teeth (4);
• one end of each connecting column (1) is installed on the scaffold-type tensile testing device (5);
• the clamping teeth (4) are hinged with the other end of the connecting column (1);
• the plurality of clamping teeth (4) are enclosed into a clamping cavity;
• an outer wall of each clamping tooth (4) is in a circular arc shape and is provided with an external thread;
• the outer wall of each clamping tooth (4) is provided with a screwing ring (3) matching with the external thread;
• and a diameter of the outer wall of each clamping tooth (4) gradually decreases in a direction toward the connecting column (1);
• the upper chuck (101) is provided with an acoustic transmitting channel (9);
• one end of the acoustic transmitting channel (9) is communicated with the outside;
• the other end is provided with an acoustic transmitting probe (10);
• and a transmitting direction of the acoustic transmitting probe (10) is downward;
• the lower chuck (102) is provided with an acoustic receiving channel (19);
• one end of the acoustic receiving channel (19) is communicated with the outside;
• the other end is provided with an acoustic receiving probe (20);
• the acoustic receiving probe (20) receives an acoustic wave transmitted by the acoustic transmitting probe (10);
• the clamping teeth (4) of the upper chuck (101) clamp an upper end of the sample (6);
• the clamping teeth (4) of the lower chuck (102) clamp a lower end of the sample (6);
• an upper end face of the sample (6) is provided with a seepage outflow hole;
• the upper chuck (101) is provided with a seepage outflow channel (13);
• one end of the seepage outflow channel (13) is connected with the seepage outflow hole, and the other end is communicated with the outside;
• a lower end face of the sample (6) is provided with a seepage inflow hole;
• the lower chuck (102) is provided with a seepage entry channel (17);
• and one end of the seepage entry channel (17) is connected with the seepage inflow hole, and the other end is communicated with the outside.