Thermo-mechanical Coupling Loading Test System for Rock Brazilian Disc Specimens

Abstract

The present invention discloses a thermal-mechanical coupling loading test system for a rock Brazilian disc specimen, which includes an installation frame. A pressure bar assembly penetrates through the top of the installation frame, and a cushion bar is installed at the bottom of the pressure bar assembly. Two heating components are slidably installed on the bottom surface of the installation frame, and the two heating components are symmetrically arranged. The specimen is installed between the two heating components; specimen clamping components are provided on both the left and right sides of the heating components. The specimen clamping components penetrate through the side walls of the corresponding installation frame. Installation boxes are provided on both the left and right sides of the installation frame, and a transverse turbine damping device matching the specimen clamping components is provided in the installation boxes; a laser detector is also installed on the inner side wall of the installation frame, and the laser detector corresponds to the top of the specimen. The present invention can solve the technical difficulties in the prior art that the rock Brazilian disc specimen cannot be effectively positioned, the temperature field cannot meet the preset temperature requirements, and the heating device interferes with the mechanical loading device, and is convenient to operate and has a relatively high test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical experimental equipment for rock-like materials, and particularly to a thermal-mechanical coupling loading test system for rock Brazilian disc specimens. Background Art

[0002] At present, the tests for determining the tensile strength of rocks mainly include direct tensile tests and indirect tensile tests. Due to the difficulty in clamping specimens during the loading process of direct tensile tests, indirect tensile tests have become a widely used testing method to explore the tensile mechanical characteristics of rocks. The most common method is to indirectly measure the tensile strength of rocks by using the splitting test of Brazilian disc specimens under the action of a radially concentrated load, that is, the Brazilian disc test of rocks.

[0003] As a widely used method for indirectly measuring the tensile strength of rocks, the Brazilian disc splitting test of rocks is relatively easier to implement compared to direct tensile tests. In recent years, carrying out research on the thermal-mechanical coupling loading test of rock Brazilian disc specimens in a real-time high-temperature environment has become an important development direction in the research field of multi-field coupling of rocks. However, there is still no scientific and effective supporting test device at present, which cannot meet the needs of indoor tests: First, during the loading process of the pressure testing machine, the cushion strip needs to be in direct contact with the Brazilian disc specimen radially perpendicular, but the disc specimen is prone to rolling and causing position deviation; Second, the specimen after heating is prone to heat loss due to exposure to the air, so the loading test needs to be carried out as soon as possible after heating is completed, and the heat loss of the specimen itself during the test process will also affect the test accuracy; Third, the positioning device and heating device of the specimen will cause disturbance to the entire pressure testing machine during the movement process, thereby interfering with the test accuracy. Summary of the Invention

[0004] Aiming at the above existing problems, the present invention aims to provide a thermal-mechanical coupling loading test system for rock Brazilian disc specimens, which solves a series of technical difficulties in the prior art such as the inability to effectively position rock Brazilian disc specimens in a thermal-mechanical coupling environment, the temperature field not meeting the preset temperature requirements, and the heating device interfering with the mechanical loading device, and is convenient to operate and has a relatively high test accuracy.

[0005] In order to achieve the above object, the technical solutions adopted by the present invention are as follows:

[0006] Thermo-mechanical coupling loading test system for rock Brazilian disc specimen, characterized in that: it includes an installation frame, a pressure rod assembly is arranged through the top of the installation frame, a cushion bar is installed at the bottom of the pressure rod assembly, two heating assemblies are slidably installed on the bottom surface of the installation frame, the two heating assemblies are symmetrically arranged, and the specimen is installed between the two heating assemblies; specimen clamping assemblies are arranged on both the left and right sides of the heating assembly, the specimen clamping assemblies penetrate through the side walls of the corresponding installation frame, installation boxes are arranged on both the left and right sides of the installation frame, and a transverse turbine damping device matching the specimen clamping assembly is arranged in the installation box; a laser detector is also installed on the inner side wall of the installation frame, and the laser detector corresponds to the top of the specimen.

[0007] Furthermore, the heating assembly includes a heating outer shell, a specimen installation groove for placing the specimen is opened on the heating outer shell, and heating guide wires are arranged on one side of each of the two specimen installation grooves away from each other;

[0008] Two sliding blocks are fixedly arranged at the bottom of each heating outer shell, first permanent magnets are fixedly arranged on one side of the sliding blocks on the two heating outer shells away from each other, magnetic buckles and magnetic grooves are arranged on one side of the two heating outer shells close to each other, and the magnetic buckle on one heating outer shell corresponds to the magnetic groove on the other heating outer shell;

[0009] Semicircular grooves for the specimen clamping assembly to pass through are opened on both the left and right sides of each heating outer shell.

[0010] Furthermore, two sliding grooves matching the sliding blocks are opened on the bottom surface of the installation frame, and damping coils are installed at the front and rear ends of the two sliding grooves.

[0011] Furthermore, the specimen clamping assembly includes a support and a control shaft, a first through hole for the control shaft to pass through is opened on the support, an energized conducting coil is fixedly arranged at the top of the support, and a second permanent magnet matching the energized conducting coil is sleeved on the control shaft;

[0012] One end of the control shaft away from the specimen penetrates through the installation frame, and second through holes for the control shaft to pass through are symmetrically opened on the left and right side walls of the installation frame.

[0013] Furthermore, the transverse turbine damping device includes a support shaft installed in the installation box, a gear is fixedly sleeved on the support shaft, one end of the control shaft away from the specimen is located in the installation box, and a damping block is fixedly arranged at one end of the control shaft located in the installation box, and a tooth groove matching the gear is opened at the top of the damping block.

[0014] Furthermore, induction sheets are installed at both ends of the tooth groove, and a plastic limit buckle is sleeved on the control shaft, and the plastic limit buckle is located between the second permanent magnet and the energized coil.

[0015] Furthermore, the pressing rod assembly includes a top plate, an intermediate shaft and a bottom plate. The top and bottom of the intermediate shaft are fixedly connected to the top plate and the bottom plate respectively. A third through hole for the intermediate shaft to pass through is formed at the top of the installation frame. The cushion strip is installed at the bottom of the bottom plate. An elevating and supporting assembly for lifting and supporting the top plate is further provided between the top plate and the top of the installation frame.

[0016] Furthermore, the elevating and supporting assembly includes a driving motor. The driving motor is installed above the installation frame, and the output end of the driving motor is connected with a bidirectional lead screw. Lead screw nuts are provided on both screw threads of the bidirectional lead screw. The top of each lead screw nut is movably connected with an upper transmission arm, and the bottom of each lead screw nut is movably connected with a lower transmission arm. The tops of the two upper transmission arms are movably connected to the same upper support plate, and the bottoms of the two lower transmission arms are movably connected to the same lower support plate. Through holes for the intermediate shaft to pass through are formed at the centers of the upper support plate and the lower support plate. The lower support plate is fixedly installed on the top of the installation frame, and the upper support plate is in contact with but not connected to the bottom surface of the top plate.

[0017] Furthermore, the test system further includes an operation table. The operation table is provided with a heating power switch, a magnetic attraction power switch, a laser power switch and an electromagnet power switch. The heating power switch and the magnetic attraction power switch are connected to the heating assembly. The laser power switch is connected to the laser detector. The electromagnet power switch is connected to the specimen clamping assembly.

[0018] The beneficial effects of the present invention are as follows: Compared with the prior art, the improvements of the present invention are as follows.

[0019] 1. The thermal-mechanical coupling loading test system for the rock Brazilian disc specimen in the present invention can heat the specimen by wrapping it with two heating assemblies. Since the heating assemblies can only move back and forth and are symmetrically arranged, the position of the specimen can be accurately positioned. At the same time, in the left-right direction, the two specimen clamping assemblies can also clamp and fix the left and right sides of the specimen. Therefore, when the cushion strip is in radial vertical contact with the Brazilian disc specimen, the disc specimen will not roll and its position will not shift. During the test, both the heating assembly and the specimen clamping assembly can be separated from the specimen, which will not affect the test results.

[0020] 2. The thermal-mechanical coupling loading test system for the rock Brazilian disc specimen in the present invention can heat the specimen by wrapping it with two heating components. After separating the two heating components from the specimen during the test, the specimen is always between the two heating components, which can keep the temperature field of the specimen test at the preset temperature, avoiding the influence on the test accuracy caused by the heat loss of the specimen due to exposure to the air during the test. At the same time, the process of separating the two heating components from the specimen will not cause disturbance to the pressure bar assembly and the pressure testing machine, further improving the test accuracy. During the process of separating the two heating components from the specimen, the magnetic buckle and the magnetic groove repel each other, so that the two heating components move away from each other. At the same time, the mutual repulsion between the first permanent magnet and the damping coil after being energized can hinder and control the forward and backward movement of the heating component, avoiding damage to the heating component due to too fast moving speed.

[0021] 3. The thermal-mechanical coupling loading test system for the rock Brazilian disc specimen in the present invention can clamp and fix the left and right sides of the specimen through two specimen clamping components. During the test, the two specimen clamping components can also be separated from the specimen, thus not affecting the test structure. During the separation process of the two specimen clamping components, they are separated by the mutual repulsion between the energized conducting coil and the second permanent magnet after being energized, which is convenient for control. At the same time, under the action of the transverse turbine damping device, the moving speed of the control shaft can be controlled to avoid damage to the device due to too fast moving speed of the control shaft.

[0022] 4. In the thermal-mechanical coupling loading test system for the rock Brazilian disc specimen in the present invention, a lifting support component is provided between the top plate of the pressure bar assembly and the top of the installation frame. When the lifting support component lifts, it can lift the entire pressure bar assembly, thus facilitating the installation of the specimen. When the lifting support component contracts, it drives the pressure bar assembly to descend. After the cushion strip contacts the top of the specimen, the lifting support component continues to contract. The pressure bar assembly will not continue to descend under the support of the specimen, and the continuously contracted lifting support component will not affect the experiment of the specimen by the pressure testing machine.

[0023] 5. The thermal-mechanical coupling loading test system for the rock Brazilian disc specimen in the present invention further includes an operation console, on which there are a heating power switch, a magnetic attraction power switch, a laser power switch and an electromagnet power switch, which can perform precise intelligent control and can be used in cooperation with the existing pressure testing machine to improve the test accuracy. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the experimental process of the thermal-mechanical coupling loading test system for the rock Brazilian disc specimen of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the thermal-mechanical coupling loading test system for the rock Brazilian disc specimen of the present invention.

[0026] Figure 3 This is a schematic structural diagram of the heating component of the present invention.

[0027] Figure 4 This is the front view of the structure of the heating component located at the rear side of the present invention.

[0028] Figure 5 This is a schematic structural diagram of the sample clamping component of the present invention.

[0029] Figure 6 This is a schematic structural diagram of the lateral turbine damping device of the present invention.

[0030] Figure 7 This is the front view of the mounting frame of the present invention.

[0031] Figure 8 This is the rear view of the mounting frame of the present invention.

[0032] Figure 9 This is a schematic structural diagram of the pressure bar component of the present invention.

[0033] Figure 10 This is a schematic structural diagram of the lifting support component of the present invention.

[0034] Wherein: 1 - mounting frame, 101 - sliding groove, 102 - damping coil, 103 - second through hole, 104 - third through hole, 2 - pressure bar component, 201 - top plate, 202 - intermediate shaft, 203 - bottom plate, 3 - cushion strip, 4 - heating component, 401 - heating housing, 402 - sample mounting groove, 403 - heating wire, 404 - sliding block, 405 - first permanent magnet, 406 - magnetic buckle, 407 - magnetic groove, 408 - semi-circular groove, 5 - sample, 6 - sample clamping component, 601 - support, 602 - control shaft, 603 - first through hole, 604 - energized coil, 605 - second permanent magnet, 606 - damping block, 607 - tooth groove, 608 - induction sheet, 609 - plastic limit buckle, 7 - mounting box, 8 - lateral turbine damping device, 801 - support shaft, 802 - gear, 9 - laser detector, 10 - operating table, 1001 - heating power switch, 1002 - magnetic attraction power switch, 1003 - laser power switch, 1004 - electromagnet power switch, 100 - pressure testing machine, 11 - driving motor, 12 - bidirectional lead screw, 13 - lead screw nut, 14 - upper driving arm, 15 - lower driving arm, 16 - upper support plate, 17 - lower support plate, 18 - lifting through hole. Detailed implementation manners

[0035] In order to enable those of ordinary skill in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0036] Refer to the attached Figure 1-10 The thermo-mechanical coupling loading test system for the rock Brazilian disc specimen shown, includes an installation frame 1. The installation frame 1 is in a square frame structure with open structures at the front and rear. A pressure bar assembly 2 penetrates through the top of the installation frame 1. The pressure bar assembly 2 includes a top plate 201, an intermediate shaft 202 and a bottom plate 203. The top and bottom of the intermediate shaft 202 are respectively fixedly connected to the top plate 201 and the bottom plate 203. A third through hole 104 for the intermediate shaft 202 to pass through is opened at the top of the installation frame 1. The top plate 201 is located above the installation frame 1, and the bottom plate 203 is located inside the installation frame 1. A cushion bar 3 is installed at the bottom of the bottom plate 203. The bottom surface of the cushion bar 3 is in a semi-circular structure and can be tangent to the top of the specimen 5.

[0037] Furthermore, an elevating and supporting assembly for lifting and supporting the top plate 201 is also provided between the top plate 201 and the top of the installation frame 1. The elevating and supporting assembly includes a driving motor 11. The driving motor 11 is installed above the installation frame 1 (an installation plate can be provided at the top of the installation frame 1, or the driving motor 11 can be installed on other supporting structures beside the test system, not shown in the figure), and the output end of the driving motor 11 is connected to a bidirectional lead screw 12. Lead screw nuts 13 are provided on both rotation directions of the bidirectional lead screw 12. The top of each lead screw nut 13 is hinged to an upper transmission arm 14, and the bottom of each lead screw nut 13 is hinged to a lower transmission arm 15. The tops of the two upper transmission arms 14 are hinged to the same upper support plate 16, and the bottoms of the two lower transmission arms 15 are hinged to the same lower support plate 17. Lifting through holes 18 for the intermediate shaft 202 to pass through are opened at the centers of the upper support plate 16 and the lower support plate 17. The lower support plate 17 is fixedly installed at the top of the installation frame 1, and the upper support plate 16 contacts but is not connected to the bottom surface of the top plate 201.

[0038] On the bottom surface of the installation frame 1, two heating components 4 are slidably installed. The two heating components 4 are symmetrically arranged, and the specimen 5 is installed between the two heating components 4. On the left and right sides of each heating component 4, a specimen clamping component 6 is provided. The specimen clamping component 6 penetrates through the side wall of the corresponding installation frame 1. On the left and right sides of the installation frame 1, installation boxes 7 are provided. Inside the installation box 7, a transverse turbine damping device 8 matching the specimen clamping component 6 is provided. On the inner side wall of the installation frame 1, a laser detector 9 is also installed, and the laser detector 9 corresponds to the top of the specimen 5. By driving the driving motor 11 to drive the bidirectional lead screw 12 to rotate, the two lead screw nuts 13 approach each other. Under the action of the upper transmission arm 14 and the lower transmission arm 15, the upper support plate 16 is lifted, so as to lift the entire pressure rod assembly 2, facilitating the installation of the specimen 5 between the two heating components 4. After the specimen 5 is installed, control the driving motor 11 to rotate in the reverse direction, the two lead screw nuts 13 move away from each other, and the upper support plate 16 descends, so that the entire pressure rod assembly 2 descends. When the cushion strip 3 contacts the top of the specimen 5, the specimen 5 supports the pressure rod assembly 2. Continue to contract the lifting support assembly, and the upper support plate 16 continues to descend. At this time, the pressure rod assembly 2 will not descend. The distance between the upper support plate 16 and the top plate 201 is used as the moving space for the pressure testing machine to press down the pressure rod assembly 2, that is, the lifting support assembly will not affect the action of the pressure testing machine on the pressure rod assembly 2. After the entire experiment is completed, the specimen 5 can be taken out by lifting the pressure rod assembly 2 upward.

[0039] Specifically, the heating component 4 includes a heating housing 401. On the heating housing 401, a specimen installation groove 402 for placing the specimen 5 is opened. The installation grooves 402 on the two heating housings 401 face each other, enclosing a receiving space matching the specimen 5. On one side of each of the two specimen installation grooves 402 away from each other, a heating wire 403 is provided, which can heat the specimen 5.

[0040] At the bottom of each heating housing 401, two sliding blocks 404 are fixedly provided. On the bottom surface of the installation frame 1, two sliding grooves 101 matching the sliding blocks 404 are opened. On one side of the sliding blocks 404 on the two heating housings 401 away from each other, a first permanent magnet 405 is fixedly provided. At the front end and the rear end of the two sliding grooves 101, damping coils 102 are installed.

[0041] On one side of the two heating shells 401 close to each other, there are magnetic buckles 406 and magnetic grooves 407. The magnetic buckle 406 on one heating shell 401 corresponds to the magnetic groove 407 on the other heating shell 401. The magnetic buckle 406 adopts an electromagnet structure, and the magnetic buckle 406 repels the magnetic groove 407 when energized. When the cushion strip 3 at the bottom of the pressure rod assembly 2 contacts the top of the specimen 5, the laser emitted by the laser detector 9 is blocked by the cushion strip 3, and the signal transmission is interrupted. At this time, the magnetic buckle 406 is energized and repels the magnetic groove 407, so that the two heating shells 401 repel and move away from each other. The sliding groove 101 cooperates with the sliding block 404. At the same time, the damping coil 102 is energized and repels the first permanent magnet 405 on the sliding block 404, hindering the movement of the heating shell 401 and making the heating shell 401 move at a low speed, so as to avoid damage caused by the heating shell 401 moving too fast along the bottom surface of the installation frame 1.

[0042] On the left and right sides of each heating shell 401, there are semicircular grooves 408 for the specimen clamping assembly 6 to pass through. When the two heating shells 401 are attached, the two corresponding semicircular grooves 408 can form a circular space.

[0043] Furthermore, the specimen clamping assembly 6 includes a support 601 and a control shaft 602. The support 601 is provided with a first through hole 603 for the control shaft 602 to pass through. An energized coil 604 is fixedly arranged on the top of the support 601. A second permanent magnet 605 matching the energized coil 604 is sleeved on the control shaft 602.

[0044] One end of the control shaft 602 away from the specimen 5 penetrates through the installation frame 1. Second through holes 103 for the control shaft 602 to pass through are symmetrically arranged on the left and right side walls of the installation frame 1.

[0045] The lateral turbine damping device 8 includes a support shaft 801 installed in the installation box 7. A gear 802 is fixedly sleeved on the support shaft 801. One end of the control shaft 602 away from the specimen 5 is located in the installation box 7, and a damping block 606 is fixedly provided at the end of the control shaft 602 located in the installation box 7. A tooth groove 607 matching the gear 802 is formed at the top of the damping block 606. Induction sheets 608 are installed at both ends of the tooth groove 607. A plastic limit buckle 609 is fixedly sleeved on the control shaft 602. The plastic limit buckle 609 is located between the second permanent magnet 605 and the energized coil 604. When the specimen is installed and positioned, one ends of the two control shafts 602 close to the specimen 5 pass through the circular space surrounded by the corresponding semi-circular grooves 408 to clamp and fix the left and right sides of the specimen 5. When testing, the energized coil 604 is energized and magnetically repels the second permanent magnet 605. Thus, when the position of the support 601 remains unchanged, the two control shafts 602 both move away from the specimen 5. At the same time, the gear 802 and the tooth groove 607 are meshed with each other to hinder the movement of the control shaft 602 and prevent damage caused by the too-fast movement speed of the control shaft 602. When the gear 802 reaches the end of the tooth groove 607, it presses the induction sheet 608. At this time, the coil 604 stops being energized, and the magnetic repulsion force disappears, and the control shaft 602 stops moving. Similarly, when the two control shafts 602 move towards each other, the specimen 5 can be clamped. When the gear 802 reaches the other end of the tooth groove 607 and presses the corresponding induction sheet 608, the conductive coil 604 stops being energized, and the magnetic attraction force of the conductive coil 604 on the second permanent magnet 605 disappears. At the same time, the plastic limit buckle 609 contacts the conductive coil 604 to limit the control shaft 602 and prevent the control shaft 602 from damaging the specimen 5.

[0046] Further, the test system further includes an operating table 10, on which there are a heating power switch 1001, a magnetic attraction power switch 1002, a laser power switch 1003, and an electromagnet power switch 1004. The heating power switch 1001 is connected to a heating wire 403 and is used to control the energization of the heating wire 403. The magnetic attraction power switch 1002 is connected to a damping coil 102 and a magnetic buckle 406, and the magnetic attraction power switch 1002 has a first gear and a second gear, which respectively control the energization of the damping coil 102 and the magnetic buckle 406 to generate different magnetic forces. The laser power switch 1003 is connected to the laser detector 9 and is used to control the startup of the laser detector 9. The electromagnet power switch 1004 is connected to an energized coil 604, and the electromagnet power switch 1004 is also divided into a first gear and a second gear, which are used to control the energization of the energized coil 604 to generate different magnetic forces. The operating table 10 can also receive and convert the signals of the laser detector 9. When the cushion strip 3 is tangent to the top of the specimen 5, the laser emitted by the laser detector 9 is blocked by the cushion strip 3, and the signal transmission is interrupted. The signal is transmitted to the operating table 10 in the form of an electrical signal through a circuit. The operating table 10 processes the electrical signal and turns on the magnetic attraction power switch 1002 and the electromagnet power switch 1004 to start energizing the damping coil 102, the magnetic buckle 406, and the energized coil 604.

[0047] Working principle of the present invention: When the present invention is in use, first, the lifting support assembly is used to lift the pressing rod assembly 2, and the specimen 5 is placed between the specimen mounting grooves 402 corresponding to the two heating housings 401. The damping coil 102 and the magnetic buckle 406 are electrified, so that the magnetic buckle 406 attracts the corresponding magnetic groove 407, thereby causing the two heating housings 401 to move towards each other and clamping the specimen 5 between the two heating housings 401. At the same time, the energized coil 604 is electrified, so that the magnetism generated by the energized coil 604 attracts the second permanent magnet 605, thereby causing the two control shafts 602 to move towards the specimen 5 to clamp and fix the left and right sides of the specimen 5. The heating power supply 1001 is started to heat the specimen 5. After the temperature of the specimen 5 reaches the preset temperature, the lifting support assembly is contracted to control the pressing rod assembly 2 to move downward. When the cushion bar 3 is tangent to the top of the specimen 5, the laser emitted by the laser detector 9 is blocked by the cushion bar 3, and the signal transmission is interrupted. It is transmitted to the operating table 10 in the form of an electrical signal through the circuit. The operating table 10 processes the electrical signal and switches the magnetic attraction power switch 1002 and the electromagnet power switch 1004 to another gear to electrify the damping coil 102, the magnetic buckle 406 and the energized coil 604 to generate opposite magnetism, so that the two heating housings 401 and the two control shafts 602 both move away from the specimen 5 and separate from the specimen 5. At the same time, the lifting support assembly continues to contract, leaving a gap between the upper support plate 15 and the top plate 201 of the pressing rod assembly 2, and the tensile strength test is carried out correspondingly by the pressure testing machine 100.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermo-mechanical coupling loading test system for rock Brazilian disc specimens, characterized in that: It includes an installation frame (1). A pressure rod assembly (2) is provided through the top of the installation frame (1). A cushion strip (3) is installed at the bottom of the pressure rod assembly (2). Two heating assemblies (4) are slidably installed on the bottom surface of the installation frame (1). The two heating assemblies (4) are symmetrically arranged. A specimen (5) is installed between the two heating assemblies (4). Specimen clamping assemblies (6) are provided on both the left and right sides of the heating assembly (4). The specimen clamping assemblies (6) penetrate through the side walls of the corresponding installation frame (1). Installation boxes (7) are provided on both the left and right sides of the installation frame (1). A transverse turbine damping device (8) matching the specimen clamping assembly (6) is provided in the installation box (7). A laser detector (9) is also installed on the inner side wall of the installation frame (1), and the laser detector (9) corresponds to the top of the specimen (5). The heating assembly (4) includes a heating housing (401). A specimen installation groove (402) for placing the specimen (5) is formed in the heating housing (401). Heating guide wires (403) are provided on one side of the two specimen installation grooves (402) away from each other. Two sliding blocks (404) are fixedly provided at the bottom of each heating housing (401). First permanent magnets (405) are fixedly provided on the side of the sliding blocks (404) on the two heating housings (401) away from each other. Magnetic buckles (406) and magnetic grooves (407) are provided on the side of the two heating housings (401) close to each other. The magnetic buckle (406) on one heating housing (401) corresponds to the magnetic groove (407) on the other heating housing (401). Semicircular grooves (408) for the specimen clamping assembly (6) to pass through are formed on both the left and right sides of each heating housing (401). The specimen clamping assembly (6) includes a support (601) and a control shaft (602). A first through hole (603) for the control shaft (602) to pass through is formed in the support (601). An energized conducting coil (604) is fixedly provided at the top of the support (601). A second permanent magnet (605) matching the energized conducting coil (604) is sleeved on the control shaft (602). One end of the control shaft (602) away from the specimen (5) penetrates through the installation frame (1). Second through holes (103) for the control shaft (602) to pass through are symmetrically formed on the left and right side walls of the installation frame (1). The transverse turbine damping device (8) includes a support shaft (801) installed in the installation box (7). A gear (802) is fixedly sleeved on the support shaft (801). One end of the control shaft (602) away from the specimen (5) is located in the installation box (7), and a damping block (606) is fixedly provided at the end of the control shaft (602) located in the installation box (7). A tooth groove (607) matching the gear (802) is formed at the top of the damping block (606).

2. The thermo-mechanical coupling loading test system for the rock Brazilian disc specimen according to claim 1, wherein: On the bottom surface of the installation frame (1), two sliding grooves (101) matching the sliding blocks (404) are provided, and damping coils (102) are installed at the front and rear ends of the two sliding grooves (101).

3. The thermo-mechanical coupling loading test system for the rock Brazilian disc specimen according to claim 1, wherein: Induction sheets (608) are installed at both ends of the tooth groove (607), and a plastic limit buckle (609) is sleeved on the control shaft (602), and the plastic limit buckle (609) is located between the second permanent magnet (605) and the energized coil (604).

4. The thermo-mechanical coupling loading test system for the rock Brazilian disc specimen according to claim 1, characterized in that: The pressing rod assembly (2) includes a top plate (201), an intermediate shaft (202) and a bottom plate (203). The top and bottom of the intermediate shaft (202) are fixedly connected to the top plate (201) and the bottom plate (203) respectively. A third through hole (104) for the intermediate shaft (202) to pass through is provided at the top of the installation frame (1). The cushion strip (3) is installed at the bottom of the bottom plate (203). An elevating and supporting assembly for lifting and supporting the top plate (201) is further provided between the top plate (201) and the top of the installation frame (1).

5. The thermo-mechanical coupling loading test system for a rock Brazilian disc specimen according to claim 4, characterized in that: The elevating and supporting assembly includes a driving motor (11). The driving motor (11) is installed above the installation frame (1), and the output end of the driving motor (11) is connected to a bidirectional lead screw (12). Lead screw nuts (13) are provided in both rotation directions of the bidirectional lead screw (12). The top of each lead screw nut (13) is movably connected to an upper transmission arm (14), and the bottom of each lead screw nut (13) is movably connected to a lower transmission arm (15). The tops of the two upper transmission arms (14) are movably connected to the same upper support plate (16), and the bottoms of the two lower transmission arms (15) are movably connected to the same lower support plate (17). Lifting through holes (18) for the intermediate shaft (202) to pass through are provided at the centers of the upper support plate (16) and the lower support plate (17). The lower support plate (17) is fixedly installed at the top of the installation frame (1), and the upper support plate (16) is in contact with but not connected to the bottom surface of the top plate (201).

6. The thermo-mechanical coupling loading test system for a rock Brazilian disc specimen according to claim 1, wherein: The test system further includes an operation console (10). A heating power switch (1001), a magnetic attraction power switch (1002), a laser power switch (1003) and an electromagnet power switch (1004) are provided on the operation console (10). The heating power switch (1001) and the magnetic attraction power switch (1002) are connected to the heating assembly (4). The laser power switch (1003) is connected to the laser detector (9), and the electromagnet power switch (1004) is connected to the specimen clamping assembly (6).

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