Integrated rock-soil sample preparation device for simulating dry-wet cycle effect

Abstract

The invention discloses an integrated rock-soil sample preparation device for simulating a dry-wet cycle effect. The device comprises a test platform, a cycle test box, a cycle infiltration device, a drying device, a data monitoring device, an MCU controller and an industrial control screen. The device realizes automatic parameter setting and circulation control through the MCU controller and the industrial control screen, solves the problems of large disturbance of sample movement, waste of water resources and electric power and the like in a traditional dry-wet circulation test, and can complete multi-time dry-wet circulation integrated sample preparation with controllable parameters on the premise of not moving the sample; an efficient and accurate simulation environment is provided for the performance test of the geotechnical material, and the method has important engineering application value.

Description

Technical Field

[0001] This invention belongs to the field of geotechnical engineering technology, specifically relating to an integrated geotechnical sample preparation device for simulating the effects of wet-dry cycles, suitable for testing the physical and mechanical properties of geotechnical materials under alternating wet-dry environments. Background Technology

[0002] In natural environments, shallow surface soil and rock masses are affected by seasonal climate changes, often experiencing alternating wet and dry processes such as rainfall-evaporation and groundwater level fluctuations. Taking a completely weathered mica-quartz schist slope as an example, meteorological factors cause changes in soil moisture, leading to the combined effects of soil schistility, fissures, and swelling / shrinkage, resulting in the deterioration of soil mechanical properties and causing slope instability. Conducting soil and rock tests on the wet-dry cycle effect is crucial for a deeper understanding of the changes in the physical and mechanical properties of soil and rock masses during wet-dry cycles. This provides a theoretical basis for geotechnical engineering design, construction, and maintenance, helps predict and prevent related engineering problems, and ensures the safety and stability of engineering projects.

[0003] However, traditional wet-dry cycle tests have significant drawbacks: they often require repeated manual soaking and drying operations. Soil and rock samples need to be immersed in water during soaking, and then placed in a drying oven or air-dried during drying. This process necessitates manual movement of the samples, causing significant disturbance and introducing unnecessary errors that affect researchers' and engineers' judgment of the wet-dry cycle effect. Existing wet-dry cycle technologies have two main problems: first, they cannot achieve automated and controllable multi-cycle wet-dry preparation of soil and rock samples without moving the samples; second, existing devices require repeated heating from room temperature to a specified temperature during the repeated wet-drying process, increasing power consumption and potentially damaging the drying equipment. Therefore, an integrated soil and rock sample preparation device for simulating the wet-dry cycle effect is needed to address these issues. Summary of the Invention

[0004] To address the limitations of traditional simulated wet-dry cycle tests in achieving automated and controllable multi-cycle wet-dry preparation of soil and rock samples without moving the samples, and the resulting waste of water and electricity resources, this invention provides an integrated soil and rock sample preparation device for simulating wet-dry cycle effects. The device comprises a test platform 1, a cyclic test chamber 5, a cyclic wetting device, a drying device, a data monitoring device, an MCU controller 8, and an industrial control panel 10. The cyclic test chamber 5 is fixedly mounted on the test platform 1, with a temperature and humidity sensor 11 on its top and a grid plate 9 fixedly installed inside. The cyclic wetting device includes a water pump 200, an inlet solenoid valve 201, an outlet solenoid valve 202, a water tank 203, and a level sensor 206, used to wet the soil and rock samples and... The drying device includes a circulating dryer 300, a processing box 306, a rotating shaft 307, an arc-shaped baffle 309, and a partition 305, used to dry and circulate hot air for the soil and rock samples. The data monitoring device includes a threaded rod 400, a sliding rod 401, a sliding rail 402, a fixed rod 403, an intelligent digital dial indicator 404, and a miniature weighing sensor 405, used to monitor the weight and deformation of the soil and rock samples during the wet-dry cycle. The industrial control panel 10 is electrically connected to the MCU controller 8, which is electrically connected to the inlet solenoid valve 201, the outlet solenoid valve 202, the liquid level sensor 206, the temperature and humidity sensor 11, the circulating dryer 300, the servo motor 308, the intelligent digital dial indicator 404, and the miniature weighing sensor 405, respectively, for overall control of the device operation.

[0005] Furthermore, in the circulating immersion device, two ports on one side of the inlet solenoid valve 201 are fixedly connected to the circulating test box 5 and the water tank 203 via hoses, and one port on the other side is fixedly connected to the inlet of the water pump 200 via hoses; one port on one side of the outlet solenoid valve 202 is fixedly connected to the outlet of the water pump 200 via hoses, and two ports on the other side are fixedly connected to the circulating test box (5) and the water tank 203 via hoses; the water tank 203 has an inlet 204, and a soft plug 205 is slidably installed inside the inlet 204; the liquid level sensor 206 in the circulating test box 5 is installed above the grid plate 9, and the liquid level sensor 206 in the water tank 203 is installed on the top of one side of the water tank 203.

[0006] Furthermore, in the drying device, a diffuser box 302 is fixedly installed on one side of the circulating test box 5, and a diffuser plate 303 is fixedly installed inside the diffuser box 302. The diffuser box 302 is connected to the circulating test box 5 through the diffuser plate 303. A first connecting pipe 301 is fixedly installed between the diffuser box 302 and the air outlet of the circulating dryer 300. The two ends of the circulating dryer 300 are fixedly connected to the first connecting pipes 301. The ends of the two first connecting pipes 301 away from the circulating dryer 300 are respectively fixedly connected to the processing boxes 306 on both sides. The first connecting pipes 301 are installed above the processing boxes 306. A second connecting pipe 304 is fixedly installed below the processing boxes 306. The end of the second connecting pipe 304 on one side of the processing box 306 away from the processing box 306 is directly fixedly connected to the circulating test box 5, and the end of the second connecting pipe 304 on the other side away from the processing box 306 is fixedly connected to the diffuser box 302.

[0007] Furthermore, a rotating shaft 307 is rotatably installed inside the processing box 306, an arc-shaped baffle 309 is fixedly installed on the rotating shaft 307, a servo motor 308 is fixedly installed on one side of the rotating shaft 307, and the servo motor 308 is fixedly installed on the outer surface of one side of the processing box 306; a plurality of ventilation grille slots 310 are opened on the processing box 306, and the width of the arc-shaped baffle 309 is greater than the total width of the ventilation grille slots 310.

[0008] Furthermore, in the data monitoring device, a slide rail 402 is slidably mounted on the threaded rod 400 and the slide rod 401, a fixed rod 403 is slidably mounted inside the slide rail 402, an intelligent digital dial indicator 404 is fixedly mounted on the fixed rod 403, and a miniature weighing sensor 405 is mounted on the grid plate 9; the slide rail 402 is threadedly engaged with the threaded rod 400 and slidably engaged with the slide rod 401, and the fixed rod 403 is clearance-fitted with the slide rail 402.

[0009] Furthermore, a cabinet door 6 is hinged to the cyclic test chamber 5, and a transparent observation window 7 is provided on the cabinet door 6.

[0010] Furthermore, a partition 305 is fixedly installed inside the circulating dryer 300.

[0011] Furthermore, the MCU controller 8 controls the port switching of the inlet solenoid valve 201 and the outlet solenoid valve 202 to realize bidirectional water circulation between the water tank 203 and the circulation test box 5.

[0012] Furthermore, the servo motor 308 drives the rotating shaft 307 to rotate, controlling the overlap or separation of the arc-shaped baffle 309 and the ventilation grille 310, thereby realizing the hot air circulation or external exhaust of the drying device.

[0013] Furthermore, the intelligent digital dial gauge 404 monitors the expansion and cracking deformation coefficient of the soil and rock sample in real time, and the miniature weighing sensor 405 monitors the weight change of the soil and rock sample in real time.

[0014] The beneficial effects of this invention are:

[0015] (1) A water tank is installed on one side of the cyclic test chamber to store water. By using a water pump in conjunction with an inlet solenoid valve and an outlet solenoid valve, the water tank can be used to draw water from the water tank into the cyclic test chamber and draw water from the cyclic test chamber back into the water tank by controlling the port switches of the inlet and outlet solenoid valves respectively. During multiple dry and wet cycle tests, the water level can be automatically controlled by the MCU controller and the liquid level sensor. The water in the water tank can be recycled for the test, saving water resources and reducing water waste.

[0016] (2) During air drying, the arc-shaped baffle overlaps with the ventilation grille groove. At this time, hot air circulates back and forth between the circulating dryer and the circulating test chamber. After air drying, the arc-shaped baffle closes with the ventilation grille groove, and both ends of the circulating dryer are connected to the outside, temporarily discharging the airflow to the outside. After the sample is fully wetted, the arc-shaped baffle is re-overlapped with the ventilation grille groove, and the hot airflow blown out by the circulating dryer will circulate again within the circulating test chamber. This structure allows the circulating dryer to continue working during sample wettability, ensuring that its internal heating device maintains a constant operating temperature without the need for repeated switching on and off. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a structural diagram of the water tank and soft plug of the present invention;

[0019] Figure 3 This is a structural schematic diagram of the water pump and slide rail of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the arc-shaped baffle and ventilation grille of the present invention. The figure shows a schematic diagram of the arc-shaped baffle and ventilation grille overlapping when the device is drying.

[0021] Figure 5 This is a schematic diagram of the structure of the arc-shaped baffle and ventilation grille groove of the present invention. The figure shows a schematic diagram of the separation of the arc-shaped baffle and ventilation grille groove when the device is immersed.

[0022] Figure 6 This is a structural schematic diagram of the threaded rod and slide bar of the present invention;

[0023] Figure 7This is a structural schematic diagram of the liquid level sensor and grid plate of the present invention;

[0024] Figure 8 This is a structural schematic diagram of the liquid level sensor and water tank of the present invention.

[0025] Reference numerals: 1. Test platform; 5. Cyclic test chamber; 6. Cabinet door; 7. Transparent observation window; 8. MCU controller; 9. Mesh plate; 10. Industrial control panel; 11. Temperature and humidity sensor; 200. Water pump; 201. Inlet solenoid valve; 202. Outlet solenoid valve; 203. Water tank; 204. Water inlet; 205. Soft plug; 206. Liquid level sensor; 300. Circulating dryer; 301. First connecting pipe; 302. Diffuser box; 303. Diffuser plate; 304. Second connecting pipe; 305. Partition plate; 306. Processing box; 307. Rotating shaft; 308. Servo motor; 309. Arc-shaped baffle; 310. Ventilation grille slot; 400. Threaded rod; 401. Sliding rod; 402. Slide rail; 403. Fixed rod; 404. Intelligent digital dial indicator; 405. Miniature weighing sensor. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0028] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0029] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of the invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0031] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0033] Example 1: Refer to Figures 1-8 An integrated soil and rock sample preparation device for simulating wet-dry cycle effects includes a test platform 1. To design an automated and resource-saving soil and rock wet-dry cycle test device, a cyclic test chamber 5 is fixedly installed on the test platform 1. A cabinet door 6 is hinged to the cyclic test chamber 5, and a transparent observation window 7 is provided on the cabinet door 6. A grid plate 9 is fixedly installed inside the cyclic test chamber 5. An industrial control screen 10 and an MCU controller 8 are fixedly installed on the test platform 1. A cyclic immersion device is provided on one side of the cyclic test chamber 5, and a drying device is provided on the cyclic test chamber 5. The chamber 5 is equipped with a data monitoring device. A temperature and humidity sensor 11 is fixedly installed on the top of the cyclic test chamber 5. The MCU controller 8 communicates and controls the various electrical components of the device. The industrial control screen 10 allows the test personnel to easily set and control the test parameters. The cyclic immersion device can immerse the sample in the cyclic test chamber 5 with liquid, and the drying device can dry the sample. The drying device and the cyclic immersion device work together in a cycle to realize the dry and wet cycle test of the soil and rock sample. During the test, the data monitoring device monitors the sample data.

[0034] To achieve the function of cyclically wetting the sample, the cyclic wetting device includes a water pump 200, which is fixedly installed on the test platform 1. An inlet solenoid valve 201 and an outlet solenoid valve 202 are fixedly installed on one side of the cyclic test chamber 5. A water tank 203 is fixedly installed on one side of the cyclic test chamber 5. A liquid level sensor 206 is fixedly installed in both the cyclic test chamber 5 and the water tank 203.

[0035] In order to control the water inlet direction of the water pump 200, two ports on one side of the water inlet solenoid valve 201 are fixedly connected to the circulation test box 5 and the water tank 203 respectively through hoses, and one port on the other side of the water inlet solenoid valve 201 is fixedly connected to the water inlet of the water pump 200 through a hose.

[0036] In order to control the water outlet direction of the water pump 200, one port of the outlet solenoid valve 202 is fixedly connected to the water outlet of the water pump 200 through a hose, and the two ports of the other side of the outlet solenoid valve 202 are fixedly connected to the circulation test box 5 and the water tank 203 through hoses respectively.

[0037] In order to realize the function of filling water into the water tank 203 and monitoring the water level, the water tank 203 has a water inlet 204, and a soft plug 205 is slidably installed in the water inlet 204. The liquid level sensor 206 in the cyclic test chamber 5 is installed above the grid plate 9, and the liquid level sensor 206 in the water tank 203 is installed on the top of one side of the water tank 203.

[0038] To achieve the function of electronic control, the industrial control panel 10 is electrically connected to the MCU controller 8. The MCU controller 8 is electrically connected to the inlet solenoid valve 201, the outlet solenoid valve 202, the water tank 203, the liquid level sensor 206, the temperature and humidity sensor 11, the circulating dryer 300, the servo motor 308, the intelligent digital dial indicator 404, and the miniature weighing sensor 405.

[0039] During the test, close cabinet door 6 and fill water tank 203 with clean water. Set test parameters on industrial control screen 10, including temperature control, number of cycles, etc. At the start of the test, the sample is first immersed to ensure water saturation. At this time, the inlet solenoid valve 201 controls the internal valve body to ensure the pipeline connected to water tank 203 and the suction port of water pump 200 is unobstructed. The outlet solenoid valve 202 ensures the pipeline connected to circulation test chamber 5 and the outlet of water pump 200 is unobstructed. When water pump 200 is working, it generates suction, which draws water from water tank 203 into water pump 200 and sends it into circulation test chamber 5 through outlet solenoid valve 202. When the liquid in circulation test chamber 5 rises and touches the liquid level sensor 206... When the sample is wetted, the MCU controller 8 controls the water pump 200 to stop working and keeps the sample wetted according to the parameters set before the test. Then, the MCU controller 8 will switch the inlet solenoid valve 201 and the outlet solenoid valve 202 to the other side of the passage. At this time, the inlet solenoid valve 201 connects the circulating test chamber 5 to the water pump 200 suction port, and the outlet solenoid valve 202 connects the water tank 203 to the water pump 200 discharge port. When the water pump 200 starts working again, it will draw water out of the circulating test chamber 5 and send it into the water tank 203. When the water in the water tank 203 touches the liquid level sensor 206, the MCU controller 8 controls the water pump 200 to stop working. After the drying is completed, the MCU controller 8 will repeat the above wetted operation.

[0040] Example 2: Refer to Figure 1-5 In order to achieve the function of circulating drying, the drying device includes a circulating dryer 300, which is fixedly installed on the circulating test chamber 5. Processing boxes 306 are fixedly installed on both sides of the circulating test chamber 5. A rotating shaft 307 is rotatably installed inside the processing box 306. An arc-shaped baffle 309 is fixedly installed on the rotating shaft 307. A partition 305 is fixedly installed inside the circulating dryer 300.

[0041] In order to allow the blown airflow to enter the device in a dispersed manner, a diffuser box 302 is fixedly installed on one side of the circulating test box 5, a diffuser plate 303 is fixedly installed inside the diffuser box 302, and a first connecting pipe 301 is fixedly installed between the diffuser box 302 and the air outlet of the circulating dryer 300.

[0042] To achieve the function of controlling the airflow direction, the circulating dryer 300 is fixedly connected to two ends of the first connecting pipe 301. The ends of the two first connecting pipes 301 away from the circulating dryer 300 are respectively fixedly connected to the processing boxes 306 on both sides. The first connecting pipes 301 are installed above the processing boxes 306. The second connecting pipe 304 is fixedly installed below the processing boxes 306. The end of one second connecting pipe 304 away from the processing box 306 is fixedly connected to the circulating test box 5, and the end of the other second connecting pipe 304 away from the processing box 306 is fixedly connected to the diffuser box 302.

[0043] To control the position of the arc-shaped baffle 309, a servo motor 308 is fixedly installed on one side of the rotating shaft 307. The servo motor 308 is fixedly installed on the outer surface of one side of the processing box 306. The end of the rotating shaft 307 away from the servo motor 308 is rotatably installed on the inner wall of the processing box 306. The other end of the rotating shaft 307 passes through the processing box 306 and is rotatably installed inside the processing box 306. Several ventilation grille slots 310 are opened on the processing box 306. The width of the arc-shaped baffle 309 is greater than the total width of the ventilation grille slots 310.

[0044] During drying, the MCU controller 8 will start the circulating dryer 300 to perform drying cycle. The circulating dryer 300 has a heating device, a temperature control device and a fan inside. The circulating dryer 300 extracts the air in the circulating test chamber 5 through the first connecting pipe 301 and the second connecting pipe 304, heats it and then sends it back into the circulating test chamber 5 through the first connecting pipe 301 and the second connecting pipe 304 on the other side to achieve circulation. The temperature and humidity in the circulating test chamber 5 are monitored in real time by the temperature and humidity sensor 11 until the drying time and temperature and humidity parameters set in the test are reached.

[0045] At this time, the MCU controller 8 controls two servo motors 308 to drive the rotating shaft 307 to rotate. The servo motors 308 will drive the arc-shaped baffles 309 to rotate through the rotating shaft 307 until the arc-shaped baffles 309 on both sides are in contact with the partition 305. At this time, the arc-shaped baffles 309 on both sides will block the second connecting pipe 304. At this time, the two ends of the circulating dryer 300 are open to the outside air through the ventilation grille slots 310. The MCU controller 8 will re-execute the above-mentioned immersion operation.

[0046] While the device is filling water to wet the sample, the MCU controller 8 will reduce the air volume of the circulating dryer 300, and after wetting, the servo motor 308 will reset the rotating shaft 307 and the arc-shaped baffle 309. After the arc-shaped baffle 309 re-fits with the ventilation grille 310, the airflow will circulate again in the circulating dryer 300 and the circulating test chamber 5.

[0047] This method allows the circulating dryer 300 to continue operating during immersion, avoiding damage caused by repeated switching of the circulating dryer 300 during circulation. It also allows the internal heating device of the circulating dryer 300 to maintain a certain temperature, eliminating the need to restart heating after each switch, thus reducing the power consumption of the circulating dryer 300. The remaining features are the same as in Example 1.

[0048] Example 3: Refer to Figure 3-5 To monitor various data of the samples in the laboratory, the data monitoring device includes a threaded rod 400 and a slide rod 401. A slide rail 402 is slidably mounted on the threaded rod 400 and slide rod 401. The slide rail 402 is installed inside the cyclic test chamber 5. A fixed rod 403 is slidably mounted inside the slide rail 402. An intelligent digital dial indicator 404 is fixedly mounted on the fixed rod 403. Miniature load cells 405 are mounted on the grid plate 9. The slide rail 402 is threadedly engaged with the threaded rod 400, and the slide rail 402 is slidably engaged with the slide rod 401. The fixed rod 403 is interference-fitted with the slide rail 402. In use, the miniature load cells 405 are distributed on the grid plate 9, and the sections are cut... A good sample is placed on a miniature weighing sensor 405, which can monitor the weight of the sample in real time. The position of the fixing rod 403 is adjusted so that the fixing rod 403 slides in the slide rail 402, ensuring that the contact of the intelligent digital dial indicator 404 is suspended on the sample. Then, the threaded rod 400 is rotated. When the threaded rod 400 rotates, it engages with the slide rail 402 to adjust the height of the slide rail 402. Adjusting the height of the slide rail 402 makes the contact of the intelligent digital dial indicator 404 contact the top of the sample. The intelligent digital dial indicator 404 can monitor the expansion and cracking deformation coefficient of the sample during the wet and dry cycle in real time. The remaining features are the same as in Example 1.

[0049] Example 4: When the sample is non-disintegrating or difficult-to-disintegrate rock, it can be directly processed into cylindrical or square specimens and subjected to wet-dry cycling according to the steps and methods of Examples 1 to 3; when the sample is easily disintegrating rock or soil sample, if only the disintegration process during the wet-dry cycling is to be tested, the wet-dry cycling test is to be carried out according to Examples 1 to 3; when the sample is easily disintegrating rock or soil sample, if mechanical testing is to be carried out later, a perforated and permeable steel or polymethyl methacrylate container is used to laterally confine the sample and then the wet-dry cycling is carried out according to Examples 1 to 3, with the remaining characteristics being the same as in Example 1.

[0050] Working principle: In use, the miniature weighing sensors 405 are distributed on the grid plate 9, and the diced sample is placed on the miniature weighing sensors 405. The miniature weighing sensors 405 can monitor the weight of the sample placed above in real time. Adjust the position of the fixing rod 403 so that the fixing rod 403 slides within the slide rail 402, ensuring that the contact of the intelligent digital dial indicator 404 is suspended on the sample. Then rotate the threaded rod 400. When the threaded rod 400 rotates, it engages with the threaded slide rail 402 to adjust the height of the slide rail 402. Adjusting the height of the slide rail 402 allows the contact of the intelligent digital dial indicator 404 to contact the top of the sample. The intelligent digital dial indicator 404 can monitor the expansion and cracking deformation coefficient of the sample during wet and dry cycles in real time. After placement, close cabinet door 6 and fill water tank 203 with clean water. Set test parameters on industrial control screen 10, including temperature control, number of cycles, etc. At the start of the test, the sample will be immersed to ensure water saturation. At this time, the inlet solenoid valve 201 controls the internal valve body to ensure the pipeline connected to water tank 203 and the suction port of water pump 200 is unobstructed. The outlet solenoid valve 202 ensures the pipeline connected to the circulation test chamber 5 and the outlet of water pump 200 is unobstructed. When water pump 200 is working, it generates suction, which draws water from water tank 203 into water pump 200 and sends it into circulation test chamber 5 through outlet solenoid valve 202. When the liquid in circulation test chamber 5 rises and touches the liquid level sensor 206, the MCU controls... The MCU controller 8 stops the water pump 200 and keeps the sample moist according to the parameters set before the test. Then, the MCU controller 8 switches the inlet solenoid valve 201 and the outlet solenoid valve 202 to the other side. At this time, the inlet solenoid valve 201 connects the circulating test chamber 5 to the water pump 200's suction port, and the outlet solenoid valve 202 connects the water tank 203 to the water pump 200's discharge port. When the water pump 200 starts working again, it will draw water out of the circulating test chamber 5 and send it into the water tank 203. When the water in the water tank 203 touches the liquid level sensor 206, the MCU controller 8 stops the water pump 200. At this time, the MCU controller 8 will start the circulating dryer 300 for drying circulation. The circulating dryer 300 has a heating device inside. The system includes a temperature control device and a fan. The circulating dryer 300 extracts air from the circulating test chamber 5 through the first connecting pipe 301 and the second connecting pipe 304, heats it, and then sends it back into the circulating test chamber 5 through the other side of the first connecting pipe 301 and the second connecting pipe 304 to achieve circulation. The temperature and humidity inside the circulating test chamber 5 are monitored in real time by the temperature and humidity sensor 11 until the drying time and temperature and humidity parameters set in the test are reached. At this time, the MCU controller 8 controls two servo motors 308 to drive the rotating shaft 307 to rotate. The servo motors 308 drive the arc-shaped baffles 309 to rotate through the rotating shaft 307 until the arc-shaped baffles 309 on both sides are in contact with the partition 305. At this time, the arc-shaped baffles 309 on both sides will block the second connecting pipe 304.At this point, both ends of the circulating dryer 300 are open to external air through the ventilation grille 310. The MCU controller 8 re-executes the above-mentioned immersion operation. Simultaneously, the MCU controller 8 reduces the airflow of the circulating dryer 300. After immersion, the servo motor 308 resets the rotating shaft 307 and the arc-shaped baffle 309. After the arc-shaped baffle 309 re-fits the ventilation grille 310, the airflow re-circulates within the circulating dryer 300 and the circulating test chamber 5. This method ensures continuous operation of the circulating dryer 300 during immersion, preventing damage caused by repeated switching on and off. It also maintains a certain temperature for the internal heating device of the circulating dryer 300, eliminating the need to restart heating after each switch, thus reducing the power consumption of the circulating dryer 300.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An integrated soil and rock sample preparation device for simulating wet-dry cycle effects, characterized in that, The system includes a test platform (1), a cyclic test chamber (5), a cyclic wetting device, a drying device, a data monitoring device, an MCU controller (8), and an industrial control screen (10). The cyclic test chamber (5) is fixedly installed on the test platform (1), with a temperature and humidity sensor (11) on its top and a grid plate (9) fixedly installed inside. The cyclic wetting device includes a water pump (200), an inlet solenoid valve (201), an outlet solenoid valve (202), a water tank (203), and a liquid level sensor (206), used to achieve wetting and water circulation of the soil and rock samples. The drying device includes a cyclic dryer (300), a processing box (306), a rotating shaft (307), an arc-shaped baffle (309), and a partition (305), used to achieve drying of the soil and rock samples. The sample drying and hot air circulation; the data monitoring device includes a threaded rod (400), a slide rod (401), a slide rail (402), a fixed rod (403), an intelligent digital dial indicator (404), and a miniature weighing sensor (405), used to monitor the weight and deformation of the soil and rock sample during the wet-dry cycle; the industrial control screen (10) is electrically connected to the MCU controller (8), and the MCU controller (8) is electrically connected to the inlet solenoid valve (201), the outlet solenoid valve (202), the liquid level sensor (206), the temperature and humidity sensor (11), the circulating dryer (300), the servo motor (308), the intelligent digital dial indicator (404), and the miniature weighing sensor (405), used to control the operation of the overall device.

2. The integrated geotechnical sample preparation device according to claim 1, characterized in that, In the circulating immersion device, two ports on one side of the inlet solenoid valve (201) are fixedly connected to the circulating test box (5) and the water tank (203) via hoses, and one port on the other side is fixedly connected to the inlet of the water pump (200) via hoses; one port on one side of the outlet solenoid valve (202) is fixedly connected to the outlet of the water pump (200) via hoses, and two ports on the other side are fixedly connected to the circulating test box (5) and the water tank (203) via hoses, respectively; the water tank (203) has an inlet (204) with a soft plug (205) slidably installed inside the inlet (204); the liquid level sensor (206) in the circulating test box (5) is installed above the grid plate (9); and the liquid level sensor (206) in the water tank (203) is installed on the top of one side of the water tank (203).

3. The integrated geotechnical sample preparation device according to claim 1, characterized in that, In the drying device, a diffuser box (302) is fixedly installed on one side of the circulating test box (5), and a diffuser plate (303) is fixedly installed inside the diffuser box (302). The diffuser box (302) is connected to the circulating test box (5) through the diffuser plate (303). A first connecting pipe (301) is fixedly installed between the diffuser box (302) and the air outlet of the circulating dryer (300). The two ends of the circulating dryer (300) are fixedly connected to the first connecting pipes (301), and the two first connecting pipes (301) are far away from the circulating test box (5). One end of the ring dryer (300) is fixedly connected to the processing boxes (306) on both sides. The first connecting pipe (301) is installed above the processing box (306). The second connecting pipe (304) is fixedly installed below the processing box (306). The end of the second connecting pipe (304) on one side of the processing box (306) away from the processing box (306) is directly fixedly connected to the cycle test box (5). The end of the second connecting pipe (304) on the other side away from the processing box (306) is fixedly connected to the diffuser box (302).

4. The integrated geotechnical sample preparation device according to claim 3, characterized in that, A rotating shaft (307) is rotatably installed inside the processing box (306). An arc-shaped baffle (309) is fixedly installed on the rotating shaft (307). A servo motor (308) is fixedly installed on one side of the rotating shaft (307). The servo motor (308) is fixedly installed on the outer surface of one side of the processing box (306). Several ventilation grille slots (310) are opened on the processing box (306). The width of the arc-shaped baffle (309) is greater than the total width of the ventilation grille slots (310).

5. The integrated geotechnical sample preparation device according to claim 1, characterized in that, In the data monitoring device, a slide rail (402) is slidably installed on the threaded rod (400) and the slide rod (401), a fixed rod (403) is slidably installed inside the slide rail (402), an intelligent digital dial indicator (404) is fixedly installed on the fixed rod (403), and a miniature weighing sensor (405) is installed on the grid plate (9); the slide rail (402) is threadedly engaged with the threaded rod (400) and slidably engaged with the slide rod (401), and the fixed rod (403) is clearance-fitted with the slide rail (402).

6. The integrated geotechnical sample preparation device according to claim 1, characterized in that, The cyclic test chamber (5) is hinged to a cabinet door (6), and a transparent observation window (7) is provided on the cabinet door (6).

7. The integrated geotechnical sample preparation device according to claim 1, characterized in that, A partition (305) is fixedly installed inside the circulating dryer (300).

8. The integrated geotechnical sample preparation device according to claim 1, characterized in that, The MCU controller (8) controls the port switches of the inlet solenoid valve (201) and the outlet solenoid valve (202) to realize bidirectional water circulation between the water tank (203) and the circulation test box (5).

9. The integrated geotechnical sample preparation device according to claim 4, characterized in that, The servo motor (308) drives the rotating shaft (307) to rotate, controlling the overlap or separation of the arc-shaped baffle (309) and the ventilation grille (310) to realize the hot air circulation or external exhaust of the drying device.

10. The integrated geotechnical sample preparation device according to claim 1, characterized in that, The intelligent digital dial gauge (404) monitors the expansion and cracking deformation coefficient of the soil and rock sample in real time, and the miniature weighing sensor (405) monitors the weight change of the soil and rock sample in real time.

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