Rock mechanics testing device under high altitude hypoxic environment

Abstract

The application relates to the technical field of rock mechanics, in particular to a rock mechanics test device under a plateau hypoxia environment, which comprises a supporting table, the upper surface of the supporting table is fixedly connected with a shell, the inside of the shell is provided with an inner shell, a dust remover, a vacuum fan and a cold air fan are fixedly installed in the inside of the supporting table, the input end of the dust remover is fixedly connected with a first pipeline, the output end of the cold air fan is fixedly connected with the inside of the shell through a second pipeline and a second electromagnetic valve, the shell and the inner shell and other components are arranged, the vacuum fan can extract the air in the inside of the inner shell through the first pipeline and other components, the cold air fan can inject cold air between the shell and the inner shell through the second pipeline and other components, the cooling of the inner shell is realized, and the plateau environment is simulated through the arrangement of the shell and the inner shell, and the test data accuracy is improved.

Description

Technical Field

[0001] This application relates to the technical field of rock mechanics, and in particular to a rock mechanics testing device for high-altitude, low-oxygen environments. Background Technology

[0002] Rock mechanics is a branch of mechanics that studies the stress, strain, failure, stability, and reinforcement of rocks under external factors (such as loads, water flow, and temperature changes). Its purpose is to solve rock engineering problems in construction projects such as hydraulic engineering and civil engineering. It is a relatively new engineering discipline that intersects with related disciplines, requiring the application of knowledge from mathematics, solid mechanics, fluid mechanics, geology, soil mechanics, and civil engineering, and fostering mutual integration with these disciplines.

[0003] A search revealed Chinese Patent Publication No. CN219243025U, which discloses a rock mechanics testing device with a retractable confining pressure sleeve. The device includes a base, a first sleeve, and a second sleeve. The base has a movable hole on its top outer wall, and the bottom end of the first sleeve is slidably connected to the inner wall of the movable hole. The second sleeve is slidably fitted onto the outer wall of the first sleeve. Both the first and second sleeves have placement cavities on their inner sides. Symmetrically arranged adjusting rods are fixedly connected to the outer walls of both sides of the second sleeve, and symmetrically arranged limiting blocks are fixedly connected to the outer walls of both sides of the first sleeve. Each limiting block has a limiting rod fixedly connected to its top, and the two limiting rods are slidably fitted inside the adjusting rods. The adjustable rods, limiting rods, limiting blocks, piston plates, and buffer springs facilitate adjustment of the placement volume of the cavity, allowing operators to adjust the cavity capacity appropriately based on the amount of rock being tested, thus providing a novel retractable confining pressure sleeve.

[0004] Regarding the aforementioned related technologies, the inventors have discovered the following deficiencies: the existing technologies lack an environmental control mechanism, making it inconvenient to adjust the air pressure and temperature of the test environment, and making it difficult to simulate the high-altitude, cold, oxygen-deficient, and low-pressure environment of the Pulang mining area, which affects the accuracy of the test data. In order to solve the deficiency of the lack of an environmental control mechanism in the existing technologies, this application sets up components such as an outer shell and an inner shell, so that the vacuum fan can adjust the internal air pressure of the inner shell through the first pipe, and the cooling fan can cool the inside of the inner shell through the second pipe, thereby achieving the effect of simulating the high-altitude environment and improving the accuracy of the test data. Utility Model Content

[0005] To facilitate the simulation of high-altitude environments and improve the accuracy of experimental data, this application provides a rock mechanics testing device for high-altitude low-oxygen environments.

[0006] This application provides a rock mechanics testing device for high-altitude low-oxygen environments, employing the following technical solution: A rock mechanics testing device for high-altitude low-oxygen environments includes a support platform. An outer shell is fixedly connected to the upper surface of the support platform. An inner shell is disposed inside the outer shell. A dust collector, a vacuum fan, and a cooler are fixedly installed inside the support platform. The input end of the dust collector is fixedly connected to a first pipe. The other end of the first pipe is connected to the interior of the inner shell via a first solenoid valve. The output end of the cooler is fixedly connected to the interior of the outer shell via a second pipe and a second solenoid valve. A third pipe is fixedly connected to the middle section of the first pipe. The other end of the third pipe is fixedly connected to the interior of the outer shell via a third solenoid valve. A gantry frame is fixedly connected to the upper surface of the support platform. A positioning shell is fixedly connected to the interior of the gantry frame. A hydraulic cylinder is slidably installed inside the positioning shell. A sealing cover is fixedly connected to the outer surface of the hydraulic cylinder.

[0007] Optionally, the outer surface of the positioning shell is fixedly connected with four slide rails arranged at equal angles, and each slide rail is fixedly connected to the gantry frame.

[0008] Optionally, the upper surface of the sealing cover is rotatably connected to four support rods arranged at equal angles, and the other end of each support rod is rotatably connected to a slider.

[0009] Optionally, each slider is internally threaded with a lead screw, and one end of each lead screw is rotatably connected to the outer surface of the positioning shell.

[0010] Optionally, a drive motor is fixedly mounted on the outer surface of the positioning shell, and a first gear is fixedly connected to the output end of the drive motor. The first gear is rotatably connected to the interior of the positioning shell.

[0011] Optionally, the positioning shell is rotatably connected to a first toothed ring and a second toothed ring, with the second toothed ring being fixedly connected to the first toothed ring.

[0012] Optionally, each lead screw is fixedly connected to a second gear at one end near the positioning housing, and each second gear is rotatably connected to the interior of the positioning housing.

[0013] In summary, this application includes the following beneficial technical effects: 1. This utility model, by setting up components such as an outer shell and an inner shell, and through the cooperation between the outer shell and the inner shell, enables a vacuum fan to extract air from inside the inner shell through components such as a first pipe, and a cold air fan to inject cold air between the outer shell and the inner shell through components such as a second pipe, thereby achieving the effect of simulating a high-altitude environment and improving the accuracy of test data by setting up an outer shell and an inner shell.

[0014] 2. This utility model, by providing components such as a support rod and a slider, and through the cooperation between the support rod and the slider, enables the second gear to drive the slider to slide via the lead screw, thereby allowing the slider to drive the sealing cover to move up and down via the support rod, thus achieving the effect of sealing the interior of the inner shell by setting the support rod and the slider. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall front structure in an embodiment of this application; Figure 2 This is a schematic diagram of the overall rear structure in an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the outer shell in an embodiment of this application; Figure 4 This is a schematic diagram of the internal structure of the positioning shell in an embodiment of this application.

[0016] Reference numerals in the attached drawings: 1. Support platform; 2. Outer shell; 3. Inner shell; 4. Dust collector; 5. Vacuum fan; 6. Air cooler; 7. First pipe; 8. Second pipe; 9. Third pipe; 10. Gantry frame; 11. Positioning shell; 12. Sealing cover; 13. Slide rail; 14. Support rod; 15. Slider; 16. Lead screw; 17. First gear; 18. First gear ring; 19. Second gear ring; 20. Second gear. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 Figure 4 provides a further detailed description of this application.

[0018] This application discloses a rock mechanics testing apparatus for use in a high-altitude, low-oxygen environment. Please refer to... Figure 1 , 23, 4, A rock mechanics testing device for high-altitude low-oxygen environments, comprising a support platform 1, a gantry frame 10 fixedly connected to the upper surface of the support platform 1, a controller fixedly installed on the outer surface of the gantry frame 10, an outer shell 2 fixedly connected to the upper surface of the support platform 1, the outer shell 2 being a double-layered hollow structure with heat insulation, an inner shell 3 inside the outer shell 2, both the inner shell 3 and the outer shell 2 being made of transparent glass, a pressure sensor and a temperature sensor installed inside the inner shell 3, a lower pressure plate fixedly installed on the inner bottom wall of the inner shell 3 for placing rock samples, a pressure sensor installed inside the lower pressure plate, a positioning shell 11 fixedly connected inside the gantry frame 10, a hydraulic cylinder slidably installed inside the positioning shell 11, an upper pressure plate fixedly installed at the output end of the hydraulic cylinder, a sealing cover 12 fixedly connected to the outer surface of the hydraulic cylinder, the sealing cover 12 being used to seal the top of the inner shell 3, the inner surface of the support platform 1 being fixedly connected to the outer surface of the support platform 1, a positioning shell 11 fixedly connected to the inner shell 10, a hydraulic cylinder slidably installed inside the positioning shell 11, an upper pressure plate fixedly installed at the output end of the hydraulic cylinder, a sealing cover 12 fixedly connected to the outer surface of the hydraulic cylinder, the sealing cover 12 being used to seal the top of the inner shell 3, the inner surface of the support platform 1 being fixedly connected to the outer surface of the support platform 1, a positioning shell 10 fixedly connected to the upper surface of the support platform 1, a controller fixedly installed on the outer ... The device is equipped with a dust collector 4, a vacuum fan 5, and a cooler 6. The input end of the vacuum fan 5 is connected to the interior of the dust collector 4. The input end of the dust collector 4 is fixedly connected to a first pipe 7. The first pipe 7 is connected to the interior of the inner shell 3 through a first solenoid valve. The vacuum fan 5 can extract the air from the interior of the inner shell 3 through the first pipe 7 and other components, thereby simulating a low-pressure, oxygen-deficient environment at high altitudes. The output end of the cooler 6 is fixedly connected to the interior of the outer shell 2 through a second pipe 8 and a second solenoid valve. The cooler 6 can deliver cold air between the outer shell 2 and the inner shell 3 through the second pipe 8 to cool the inner shell 3, thereby simulating a low-temperature environment at high altitudes. The middle section of the first pipe 7 is fixedly connected to a third pipe 9. The other end of the third pipe 9 is fixedly connected to the interior of the outer shell 2 through a third solenoid valve. The air between the outer shell 2 and the inner shell 3 can enter the first pipe 7 through the third pipe 9 to achieve hot and cold air exchange.

[0019] Please see Figure 1 , 4 The upper surface of the sealing cover 12 is rotatably connected to four support rods 14 arranged at equal angles. The other end of each support rod 14 is rotatably connected to a slider 15. The slider 15 drives the sealing cover 12 to rise and fall through the support rods 14, thereby sealing the top of the inner shell 3.

[0020] Please see Figure 1 , 4 The outer surface of the positioning shell 11 is fixedly connected with four slide rails 13 arranged at equal angles. Each slide rail 13 corresponds to a slider 15. The interior of each slide rail 13 is slidably connected to the outer surface of the corresponding slider 15. Each slide rail 13 is fixedly connected to the gantry frame 10. The slide rail 13 limits the movement of the slider 15 and supports the support rod 14 and other components.

[0021] Please see Figure 4Each slider 15 has a screw 16 threaded inside, each screw 16 corresponds to a slide rail 13, one end of each screw 16 is rotatably connected to the outer surface of the positioning shell 11, and the other end of each screw 16 is rotatably connected to the inside of the slide rail 13.

[0022] Please see Figure 4 Each lead screw 16 is fixedly connected to a second gear 20 near the end of the positioning housing 11. The second gear 20 is a bevel gear. Each second gear 20 is rotatably connected to the inside of the positioning housing 11. The second gear 20 drives the lead screw 16 to rotate, thereby driving the slider 15 to slide inside the slide rail 13.

[0023] Please see Figure 4 The positioning housing 11 is rotatably connected to a first toothed ring 18 and a second toothed ring 19. The second toothed ring 19 is a conical toothed ring. Each second gear 20 meshes with the second toothed ring 19. The second toothed ring 19 is fixedly connected to the first toothed ring 18. The second toothed ring 19 drives multiple lead screws 16 to rotate synchronously through the second gears 20.

[0024] Please see Figure 4 A drive motor is fixedly installed on the outer surface of the positioning shell 11. The output end of the drive motor is fixedly connected to a first gear 17. The first gear 17 meshes with the first gear ring 18. The first gear 17 is rotatably connected to the inside of the positioning shell 11. The output end of the drive motor drives the first gear 17 to rotate, so that the first gear 17 drives the first gear ring 18 to drive the second gear ring 19 to rotate.

[0025] The implementation principle of the rock mechanics testing device in a high-altitude, low-oxygen environment according to this application embodiment is as follows: A rock sample is placed on the upper surface of the lower pressure plate inside the inner shell 3. The drive motor is started, and its output drives the first gear 17 to rotate. The first gear 17 drives the first gear ring 18 and the second gear ring 19 to rotate. The second gear ring 19 drives the second gear 20 to rotate. The second gear 20 drives the lead screw 16 to rotate. The lead screw 16 drives the slider 15 to slide inside the slide rail 13. The slider 15, through the support rod 14, drives the sealing cover 12 to move downwards, sealing the top of the inner shell 3. The first solenoid valve is closed, and the second solenoid valve and the third solenoid valve are opened. The solenoid valve activates the vacuum fan 5 and the cooler 6. Cold air enters the space between the outer shell 2 and the inner shell 3 through the second pipe 8. After heat exchange, it enters the interior of the first pipe 7 through the third pipe 9, and then is discharged through the dust collector 4 and the vacuum fan 5, thus cooling the interior of the inner shell 3. The cooler 6, the second solenoid valve, and the third solenoid valve are then closed. The first solenoid valve and the vacuum fan 5 are then opened. Air from inside the inner shell 3 enters the interior of the first pipe 7 and is discharged through the dust collector 4 and the vacuum fan 5, thereby reducing the internal air pressure of the inner shell 3. The hydraulic cylinder is then activated. The output end of the hydraulic cylinder drives the upper pressure plate to move downward to pressurize the rock sample, thus enabling the detection of the rock sample.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rock mechanics testing device for high-altitude low-oxygen environments, comprising a support platform (1), characterized in that: The upper surface of the support platform (1) is fixedly connected to the outer shell (2), and the inner shell (3) is provided inside the outer shell (2). The dust collector (4), vacuum fan (5) and air cooler (6) are fixedly installed inside the support platform (1). The input end of the dust collector (4) is fixedly connected to the first pipe (7). The other end of the first pipe (7) is connected to the inside of the inner shell (3) through the first solenoid valve. The output end of the air cooler (6) is fixedly connected to the inside of the outer shell (2) through the second pipe (8) and the second solenoid valve. The middle section of the first pipe (7) is fixedly connected to the third pipe (9). The other end of the third pipe (9) is fixedly connected to the inside of the outer shell (2) through the third solenoid valve. The upper surface of the support platform (1) is fixedly connected to the gantry frame (10). The inside of the gantry frame (10) is fixedly connected to the positioning shell (11). The inside of the positioning shell (11) is slidably installed with a hydraulic cylinder. The outer surface of the hydraulic cylinder is fixedly connected to a sealing cover (12).

2. The rock mechanics testing device for a high-altitude, low-oxygen environment according to claim 1, characterized in that: The outer surface of the positioning shell (11) is fixedly connected with four slide rails (13) arranged at equal angles, and each slide rail (13) is fixedly connected to the gantry frame (10).

3. The rock mechanics testing device for a high-altitude, low-oxygen environment according to claim 1, characterized in that: The upper surface of the sealing cover (12) is rotatably connected to four support rods (14) arranged at equal angles, and the other end of each support rod (14) is rotatably connected to a slider (15).

4. The rock mechanics testing device for a high-altitude, low-oxygen environment according to claim 3, characterized in that: Each slider (15) is internally threaded with a lead screw (16), and one end of each lead screw (16) is rotatably connected to the outer surface of the positioning shell (11).

5. The rock mechanics testing device for a high-altitude, low-oxygen environment according to claim 1, characterized in that: A drive motor is fixedly installed on the outer surface of the positioning shell (11), and a first gear (17) is fixedly connected to the output end of the drive motor. The first gear (17) is rotatably connected to the inside of the positioning shell (11).

6. The rock mechanics testing device for a high-altitude, low-oxygen environment according to claim 1, characterized in that: The positioning shell (11) is rotatably connected to a first toothed ring (18) and a second toothed ring (19), and the second toothed ring (19) is fixedly connected to the first toothed ring (18).

7. The rock mechanics testing device for a high-altitude, low-oxygen environment according to claim 4, characterized in that: Each lead screw (16) is fixedly connected to a second gear (20) at one end near the positioning shell (11), and each second gear (20) is rotatably connected to the inside of the positioning shell (11).

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