Dry-wet circulating device for rock long-term bearing experiment

Abstract

The utility model provides a dry-wet circulating device for a rock long-term bearing experiment, and belongs to the technical field of geological engineering and mineral engineering. The dry-wet cycle device comprises an experiment box, a pressurization system, a drying system and an erosion water solution system, the erosion aqueous solution system comprises a liquid storage container and a stirrer, and the stirrer is arranged in the liquid storage container; a sample placing position is arranged in the pressurization system; the pressurization system is arranged in the experiment box; the output end of the drying system is unidirectionally communicated with the experiment box; the erosion aqueous solution system is bidirectionally communicated with the experiment box. Through the design of combining the experiment box, the pressurization system, the drying system and the erosion aqueous solution system, comprehensive simulation of the rock sample is realized. The device can effectively simulate the dry-wet alternation phenomenon of the rock in the natural environment, and can also apply long-term mechanical load, so that the performance change of the rock in practical application can be evaluated more truly.

Description

Technical Field

[0001] The utility model relates to the technical field of geological engineering and mining engineering, in particular to a dry-wet cycle device used for long-term rock bearing experiments. Background Art

[0002] As an important building material and a subject of geological research, rock is subject to numerous influences in the natural environment, causing changes in its physical and chemical properties, thereby impacting its load-bearing capacity and service life. Wet-dry cycles are a key factor influencing rock durability. Under natural conditions, rock undergoes periodic wetting and drying cycles. This alternation of wetting and drying causes changes in the rock's internal structure, which in turn affects its overall performance.

[0003] To better understand how rock properties change in real-world environments, researchers need to simulate natural wet-dry cycling conditions for laboratory testing. Existing rock mechanical testing methods primarily focus on static or dynamic loading conditions, with limited consideration of the impact of wet-dry cycling on rock properties. Furthermore, conventional wet-dry cycling testing equipment is often complex and difficult to operate, making it difficult to precisely control various parameters during the wet-dry cycling process, such as humidity, temperature, and pressure. Utility Model Content

[0004] In response to the above problems, the purpose of the present invention is to provide a dry-wet cycle device for long-term rock bearing experiments that has a reasonable structure, is easy to operate, and can accurately control experimental parameters, so as to more accurately evaluate the mechanical properties and durability of rocks under dry-wet alternating conditions.

[0005] Provided is a dry-wet cycle device for long-term rock bearing experiments, comprising: an experimental box, a pressurizing system, a drying system, and an erosion water solution system;

[0006] The erosion water solution system includes a liquid storage container and a stirrer, wherein the stirrer is arranged in the liquid storage container;

[0007] The pressurizing system is provided with a sample placement position; the pressurizing system is provided in the experimental box;

[0008] The output end of the drying system is in one-way communication with the interior of the experimental box;

[0009] The erosion aqueous solution system is in bidirectional communication with the experimental box.

[0010] Furthermore, the pressurizing system includes a pressure applying device and a lower pad;

[0011] The lower pad is arranged on the inner bottom surface of the experimental box;

[0012] The pressure applying device is arranged above the lower pad, and a sample placement position is formed between the pressure applying device and the lower pad.

[0013] Furthermore, the erosion aqueous solution system is bidirectionally connected to the bottom of the experimental box.

[0014] Furthermore, the erosion water solution system also includes a lifting and regulating device;

[0015] The liquid storage container is installed on the lifting and adjusting device.

[0016] Furthermore, the erosion aqueous solution system also includes a pH control device;

[0017] The pH control device includes a pH detection device and an acid-base substance adding device;

[0018] The acid and alkali substance adding device is connected to the erosion aqueous solution system;

[0019] The acid and alkali substance adding device is arranged in the erosion aqueous solution system.

[0020] Furthermore, the erosion aqueous solution system is connected to the experimental box via a pipeline, and a water pump is provided on the pipeline.

[0021] Furthermore, it also includes an intelligent control system for water pumps;

[0022] The water pump intelligent control system includes a water level controller, a water stop detection device and a water replenishment detection device;

[0023] The water stop detection device and the water replenishment detection device are arranged in the experimental box, the water stop detection device is located above the sample, and the water replenishment detection device is located below the sample;

[0024] The water stop detection device, the water replenishment detection device and the water pump are electrically connected to the water level controller respectively.

[0025] Furthermore, the drying system includes a dryer; an exhaust port of the dryer is connected to the experimental box.

[0026] Furthermore, it also includes a drying intelligent control system;

[0027] The drying intelligent control system includes a temperature control switch and a wind speed control switch;

[0028] The temperature control switch and the wind speed control switch are connected to the dryer.

[0029] Furthermore, it also includes a relative humidity monitoring device, which is arranged in the experimental box.

[0030] The embodiments of the present invention have the following advantages or beneficial effects:

[0031] By combining the design of an experimental box, a pressurization system, a drying system, and an erosion water solution system, a comprehensive simulation of rock specimens is achieved. Specifically, this device effectively simulates the alternating dry-wet cycles of rock in a natural environment while also applying long-term mechanical loads, which helps to more realistically evaluate the changes in rock performance in practical applications. Compared to traditional methods that separate dry-wet cycles and mechanical testing, this device allows for the simultaneous conduct of these tests, improving the reliability and accuracy of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0033] Figure 1 Schematic diagram of a dry-wet cycle device for long-term rock bearing experiments according to an exemplary embodiment.

[0034] The description of the accompanying drawings is as follows:

[0035] 1. Experimental box; 2. Pressurization system; 3. Drying system; 4. Corrosion water solution system;

[0036] 21. Pressure applying device; 22. Lower pad; 23. Upper pad;

[0037] 31. Dryer, 32. Temperature control switch, 33. Wind speed control switch; 34. Relative humidity monitoring device;

[0038] 41. Liquid storage container, 42. Agitator, 43. Lifting and lowering device, 44. pH detection device, 45. Acid and alkaline substance adding device, 46. Water pump, 47. Water outage detection device, 48. Water replenishment detection device. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0040] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0041] Figure 1 This is a schematic diagram of a dry-wet cycle device for long-term rock bearing tests according to an exemplary embodiment. The above schematic diagram only illustrates the structural relationship related to the utility model and is not intended to be an actual scale of the actual product.

[0042] like Figure 1 As shown, the dry-wet cycle device for long-term rock bearing test of the embodiment of the present invention includes: an experimental box 1, a pressurizing system 2, a drying system 3 and an erosion aqueous solution system 4; the erosion aqueous solution system 4 includes a liquid storage container 41 and an agitator 42, and the agitator 42 is arranged in the liquid storage container 41; a sample placement position is provided in the pressurizing system 2; the pressurizing system 2 is arranged in the experimental box 1; the output end of the drying system 3 is unidirectionally connected to the experimental box 1; the erosion aqueous solution system 4 is bidirectionally connected to the experimental box 1.

[0043] First, before the experiment begins, the sample needs to be prepared and placed on the sample placement position of the pressurized system 2. This position is inside the experimental box 1, which means that all subsequent operations will be carried out inside this experimental box 1.

[0044] Next, to simulate the pressure that rocks may experience in a natural environment, it is necessary to start the pressurization system 2 to apply pressure to the sample. This step simulates the actual stress conditions that rocks experience underground or in geological structures.

[0045] When a dry environment needs to be simulated, the erosion solution system 4 should be turned off to ensure that no liquid enters the experimental box 1. At this time, the drying system 3 is turned on, and its output end is connected to the interior of the experimental box 1 in a one-way manner, which means that only air can be input into the experimental box 1. The drying system 3 will provide a dry airflow or environment to simulate the changes in rock under dry conditions.

[0046] When the experiment requires simulating a wet environment, the drying system 3 is shut down and the corrosive solution system 4 is opened. This system comprises a liquid reservoir 41 and a stirrer 42. The liquid reservoir 41 is used to store the specific corrosive solution, while the stirrer 42 ensures the uniform distribution of the solution components. The corrosive solution system 4 is bidirectionally connected to the experimental box 1, meaning it can deliver solution into the experimental box 1 and also allow solution to be discharged back into the liquid reservoir 41. This allows the specimen to be completely immersed in a simulated acidic and alkaline wet environment to observe the rock's reaction under these conditions.

[0047] During the entire process, by alternately using the drying system 3 and the erosion aqueous solution system 4, cyclic testing of the specimen in different dry and wet environments can be achieved, thereby evaluating the long-term bearing capacity and stability of the rock under these conditions.

[0048] The experimental box 1 needs to be able to withstand a certain amount of pressure without deformation and must also be corrosion-resistant, as it may come into contact with various aggressive aqueous solutions. To ensure the stability and safety of the experimental environment, the experimental box 1 must be well sealed, especially when simulating a humid environment. An acrylic sheet is installed on the front of the experimental box 1 to facilitate observation of the condition of the specimen inside. This acrylic sheet needs to be sufficiently thick to ensure strength, and the joints must be glued with a waterproof coating to prevent leakage.

[0049] Experiment Box 1 is typically made of stainless steel or a high-strength alloy, which is both strong and corrosion-resistant. Acrylic panels are used as observation windows, as they offer excellent transparency and impact resistance, making them suitable for this purpose. The joints between the acrylic panels and the rest of Experiment Box 1 are bonded with a waterproof coating to ensure a tight seal and prevent leakage of the aqueous solution.

[0050] The pressurizing system 2 includes a pressure-applying device 21 and a lower pad 22. The lower pad 22 is disposed on the inner bottom surface of the experimental box 1. The pressure-applying device 21 is disposed above the lower pad 22, forming a sample placement position between the pressure-applying device 21 and the lower pad 22. In one embodiment, the pressure-applying device 21 includes an upper pad 23 and a press.

[0051] Lower pad 22, located on the inner bottom surface of test box 1, is a foundational component of the entire pressurization system 2. It tightly bonds with the bottom surface of test box 1, providing a stable support surface. This ensures uniform force is applied to the specimen during pressurization, preventing deformation or slippage caused by an unstable bottom. Lower pad 22 is typically made of a hard material, such as steel or a high-strength alloy, to ensure resistance to deformation under high pressure.

[0052] The pressure-applying device 21 mainly consists of two parts: an upper pad 23 and a press. The upper pad 23 is located above the lower pad 22 and is in direct contact with the sample. Its shape and size are designed to match the sample to ensure that the pressure is evenly distributed. The press is used to generate and control the pressure applied to the sample. The press can be hydraulic or pneumatic, depending on the requirements of the experiment and the capabilities of the equipment. The space formed between the upper pad 23 and the lower pad 22 is the sample placement position. This is the position where the sample is clamped and receives pressure, ensuring that the sample can be stably centered during the experiment to avoid deviation.

[0053] The design of the upper block 23 ensures uniform pressure distribution across the specimen surface, preventing localized overpressure that could damage the specimen. The press can precisely control the applied pressure, ensuring more reliable experimental data. The upper block 23 can be adjusted in size or shape to accommodate specimens of varying sizes and shapes.

[0054] The erosive aqueous solution system 4 is bidirectionally connected to the bottom of the experimental box 1. This design allows the experimenter to inject the erosive aqueous solution through the pipe from the bottom of the experimental box 1 when it is necessary to simulate a wet environment, so that the sample is completely immersed in the solution. This can simulate the wet effects on rocks in the natural environment, especially the effects of acidic and alkaline solutions, which is very important for evaluating the physical and chemical properties of rocks under erosive conditions. When the wet environment test is completed, the solution in the experimental box 1 can be completely discharged through the same interface. This not only simplifies the structure of the system, but also improves the convenience of operation and reduces the trouble and potential leakage risks caused by multiple replacement of pipes. In addition, through the bidirectional connection design, the experimenter can accurately control the degree and duration of wetness in the experimental box 1. For example, a certain amount of solution can be injected at regular intervals and then discharged to simulate the dry-wet cycle phenomenon in nature, thereby more realistically reflecting the changes in rocks in the actual environment.

[0055] In one embodiment, the etching aqueous solution system 4 further includes a lifting and adjusting device 43 ; the liquid storage container 41 is installed on the lifting and adjusting device 43 .

[0056] Liquid storage container 41 is mounted on a lifting and adjusting device 43, whose primary function is to adjust the height of liquid storage container 41. This device can be used to adjust its height relative to the bottom of the experimental box 1, allowing it to be moved up and down according to experimental needs. Lifting and adjusting device 43 can be manual or automated. Common manual methods include a screw jack or a handwheel-driven lifting platform, while automated methods may use an electric motor-driven lifting system.

[0057] In one embodiment, the erosion aqueous solution system 4 also includes a pH control device; the pH control device includes a pH detection device 44 and an acid-base substance adding device 45; the acid-base substance adding device 45 is connected to the erosion aqueous solution system 4; the acid-base substance adding device 45 is arranged in the erosion aqueous solution system 4.

[0058] In this embodiment, the erosion water solution system 4 further integrates a pH control device to ensure that the pH value of the solution can be accurately controlled during the experiment. The following is a detailed description of the system structure and its function:

[0059] The pH detection device 44 is used to monitor the pH of the erosion solution in real time to ensure that the solution's pH meets experimental requirements. It typically includes a pH electrode and a pH meter. The pH electrode is inserted into the liquid reservoir 41, and the pH meter displays real-time readings. The pH electrode is typically installed inside the liquid reservoir 41 or in the pipe connecting the liquid reservoir 41 to the experimental box 1 to directly measure the solution's pH.

[0060] Based on the information provided by the pH detection device 44, the acid / base addition device 45 adds an appropriate amount of water-soluble acid or base to the liquid storage container 41 to adjust the solution's pH to the desired level. This device typically includes a small container for storing the water-soluble acid or base, along with a metering pump or burette for precise control of the amount added. The acid / base addition device 45 is located within the aqueous erosion solution system 4 and connected to the liquid storage container 41, ensuring that the desired substance can be added to the liquid storage container 41 at any time.

[0061] The working process and principle are as follows:

[0062] The etching aqueous solution is injected into the liquid storage container 41 .

[0063] The pH detection device 44 is used to measure the initial pH value of the solution.

[0064] If the measured pH value does not meet the pH range required for the experiment, the pH control device will be activated.

[0065] According to the required pH value adjustment amount, the acid-base substance adding device 45 will add an appropriate amount of water-soluble acid or base to the liquid storage container 41.

[0066] After the addition is completed, the pH value is measured again using the pH detection device 44 to confirm whether it reaches the predetermined pH range.

[0067] When the pH value of the solution reaches the experimental requirement, the adjusted solution is injected into the experimental box 1 through the erosion aqueous solution system 4 .

[0068] During the entire experiment, the pH detection device 44 will continuously monitor the pH value of the solution.

[0069] If the pH value changes, the acid-base substance adding device 45 will readjust the pH of the solution to keep it within the set range.

[0070] Through real-time monitoring and dynamic adjustment, the pH of the erosion solution is consistently maintained within the required experimental range, improving the accuracy and reliability of experimental data. The pH of the solution can be flexibly adjusted to suit different experimental requirements, making it suitable for a variety of rock erosion experiments. The pH control device achieves a degree of automation, reducing the manual operation burden on experimenters and improving experimental efficiency.

[0071] In one embodiment, the erosion aqueous solution system 4 is connected to the experimental box 1 through a pipeline, and a water pump 46 is provided on the pipeline.

[0072] The main function of the water pump 46 is to provide power for the transportation of the erosion water solution, ensuring that the solution can be effectively transported from the liquid storage container 41 to the experimental box 1. This is especially important for situations where a higher flow rate or long-distance transmission is required. By controlling the working state of the water pump 46 (such as the rotation speed), the flow rate of the erosion water solution can be adjusted, thereby accurately controlling the amount of the erosion water solution in the experimental box 1. This is very critical for simulating rock changes under different humidity conditions. When the solution in the experimental box 1 needs to be discharged, the direction of the water pump 46 can be changed to achieve the solution backflow from the experimental box 1 to the liquid storage container 41.

[0073] Choose the appropriate type of water pump 46 based on the specific needs of the experiment, such as a centrifugal pump, plunger pump, or diaphragm pump. Each pump has its own application. Consider factors such as the maximum flow rate, head, and power of the water pump 46 to ensure that the selected water pump 46 can meet the experimental requirements.

[0074] In one embodiment, it also includes an intelligent control system for a water pump 46; the intelligent control system for the water pump 46 includes a water level controller, a water stop detection device 47 and a water replenishment detection device 48; the water stop detection device 47 and the water replenishment detection device 48 are arranged in the experimental box 1, the water stop detection device 47 is located above the sample, and the water replenishment detection device 48 is located below the sample; the water stop detection device 47, the water replenishment detection device 48 and the water pump 46 are electrically connected to the water level controller respectively.

[0075] The water level controller is the core of the intelligent control system. It is responsible for receiving signals from the water stop detection device 47 and the water replenishment detection device 48 and controlling the operating state of the water pump 46 accordingly. The water level controller is usually an electronic device, which can be a microprocessor-based control system that can process sensor signals and issue corresponding control instructions.

[0076] Water stop detection device 47 is located within experimental box 1, above the specimen. It detects whether the liquid level within experimental box 1 is above a preset level. Once the liquid level is detected to have risen below this level, a signal is sent to the water level controller, which in turn stops water pump 46. Water stop detection device 47 can utilize a float switch, photoelectric sensor, or other type of liquid level sensor to detect water stoppage.

[0077] Water replenishment detection device 48 is also located within experimental box 1, but below the specimen. It detects whether the liquid level within experimental box 1 is below a preset level. When the liquid level reaches this level, water replenishment detection device 48 sends a signal to the water level controller, which in turn controls water pump 46 to start operating. Similar to water outage detection device 47, liquid level detection can be achieved using technologies such as float switches and photoelectric sensors.

[0078] When the liquid level in the experimental box 1 drops to the position of the water replenishment detection device 48 due to evaporation or drainage, the water replenishment detection device 48 will be triggered and a signal will be transmitted to the water level controller. After receiving the signal, the water level controller will start the water pump 46 to start replenishing the corrosive solution into the experimental box 1.

[0079] As the supplementary solution is continuously injected, the liquid level in the experimental box 1 gradually rises. When the liquid level rises to the position where the water stop detection device 47 is located, the water stop detection device 47 will be triggered and transmit a signal to the water level controller, which will then stop the water pump 46.

[0080] The water level controller continuously monitors the status of the water stop detection device 47 and the water replenishment detection device 48 to ensure that the liquid level in the experimental box 1 is always maintained within the set range. If the liquid level exceeds the set range, the system will automatically adjust the working status of the water pump 46 to restore the ideal liquid level.

[0081] The intelligent control system automatically replenishes and controls the erosion solution, reducing the need for manual intervention. The liquid level within the experimental box 1 can be precisely controlled, ensuring consistent and repeatable experimental conditions. This eliminates the risk of experimental failure or equipment damage caused by excessively high or low liquid levels. The automated water replenishment process improves experimental efficiency, reduces waiting time, and reduces operational complexity.

[0082] In one embodiment, the drying system 3 includes a dryer 31 ; an exhaust port of the dryer 31 is in communication with the experimental box 1 .

[0083] The dryer 31 has an air inlet and an exhaust port. The air inlet is used to introduce dry air or inert gas (such as nitrogen) from the outside, which will be used to dry the environment inside the experimental box 1. The exhaust port is used to discharge the dried gas into the experimental box 1, thereby achieving a drying effect.

[0084] The dryer 31 can be a heating element or a heating device with a fan, which is used to accelerate the drying process of the air. The dryer 31 makes the air drier and promotes air circulation by heating the air.

[0085] The working process is as follows:

[0086] External dry air or inert gas enters the dryer 31 through the air inlet of the dryer 31 .

[0087] The incoming air may be pre-dehumidified to ensure its inherent dryness.

[0088] The dryer 31 heats the incoming gas to increase its temperature, further improving the drying capacity of the gas.

[0089] A fan or other circulation device in the dryer 31 causes the gas to be heated evenly.

[0090] The heated and dried gas is discharged into the experimental box 1 through the exhaust port of the dryer 31 .

[0091] After the exhausted dry gas enters the experimental box 1 , it will take away the moisture in the experimental box 1 , thereby achieving a drying process for the environment in the experimental box 1 .

[0092] In order to maintain the dry state in the experimental box 1, the drying system 3 continuously introduces dry gas, which is heated by the dryer 31 and then discharged into the experimental box 1. This process will continue until the experiment is completed or the required dryness is achieved.

[0093] By heating and circulating the dry gas in the dryer 31 , moisture in the experimental box 1 can be removed quickly and effectively.

[0094] In practical applications, this drying system can simulate the changes in rock in a dry environment, which is important for studying the mechanical properties and chemical stability of rocks under different humidity conditions. By precisely controlling the drying conditions, more reliable and consistent experimental results can be obtained.

[0095] In one embodiment, a drying intelligent control system is further included; the drying intelligent control system includes a temperature control switch 32 and a wind speed control switch 33; the temperature control switch 32 and the wind speed control switch 33 are connected to the dryer 31.

[0096] The temperature control switch 32 is used to adjust the heating element within the dryer 31 to control the air temperature during the drying process. The temperature control switch 32 can be a thermostat that automatically adjusts the power output of the heating element according to a preset temperature value. The temperature control switch 32 is connected to the dryer 31 and can monitor and adjust the temperature within the dryer 31 in real time.

[0097] The wind speed control switch 33 is used to adjust the speed of the fan inside the dryer 31, thereby controlling the air circulation rate. The wind speed control switch 33 can be a frequency converter or speed regulator, which can adjust the fan speed according to a preset wind speed value. The wind speed control switch 33 is also connected to the dryer 31 and can adjust the fan speed in real time.

[0098] The desired drying temperature is set according to the experimental requirements. The temperature control switch 32 continuously monitors the temperature inside the dryer 31. When the monitored temperature is lower than the preset value, the temperature control switch 32 increases the power output of the heating element, and vice versa, it reduces the power output to maintain a constant temperature.

[0099] The desired wind speed is set according to the experimental requirements. The wind speed control switch 33 continuously monitors the speed of the fan inside the dryer 31. When the monitored wind speed is lower than the preset value, the wind speed control switch 33 increases the fan speed, otherwise it decreases the speed to maintain a constant wind speed.

[0100] During the test experiment, the drying system 3 is started and the required temperature and wind speed are set.

[0101] The dryer 31 starts working, the heating element heats the incoming dry air, and the fan drives the air circulation.

[0102] The temperature control switch 32 and the wind speed control switch 33 monitor and adjust the temperature and wind speed inside the dryer 31 in real time according to preset values.

[0103] The heated and dried gas is discharged into the experimental box 1 through the exhaust port of the dryer 31, taking away moisture.

[0104] The intelligent drying control system precisely controls the temperature and wind speed during the drying process, ensuring consistent and reliable experimental conditions. The temperature control switch 32 and wind speed control switch 33 automatically adjust the operating state of the dryer 31, reducing the need for manual intervention. The temperature and wind speed can be flexibly set according to the specific needs of the experiment, making it suitable for a variety of experiments. This intelligent adjustment avoids unnecessary energy waste and improves the efficiency of the drying process.

[0105] In one embodiment, a relative humidity monitoring device 34 is further included, and the relative humidity monitoring device 34 is disposed in the experimental box 1 .

[0106] The relative humidity monitoring device 34 can obtain the relative humidity data in the experimental box 1 in real time, ensuring that the experimenter can understand the humidity conditions of the current experimental environment in a timely manner.

[0107] The humidity monitoring device transmits the collected data to the drying intelligent control system as an important basis for adjusting the operating parameters of the drying system 3. When the humidity exceeds the preset range, the humidity monitoring device can trigger an alarm mechanism, reminding the experimenter to take measures to adjust the system parameters.

[0108] The humidity monitoring device is linked to the temperature control switch 32 and wind speed control switch 33 in the drying intelligent control system to automatically adjust the operating state of the dryer 31 based on real-time humidity data. This forms a closed-loop control system. The data collected by the humidity monitoring device serves as a feedback signal to adjust the operating parameters of the heating element and fan to maintain the target humidity.

[0109] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on the specific circumstances.

[0110] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0111] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0112] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dry-wet cycle device for long-term rock bearing experiments, characterized in that: include: Experimental box (1), pressurizing system (2), drying system (3) and erosion aqueous solution system (4); The erosion aqueous solution system (4) includes a liquid storage container (41) and a stirrer (42), wherein the stirrer (42) is arranged in the liquid storage container (41); The pressurizing system (2) is provided with a sample placement position; the pressurizing system (2) is arranged in the experimental box (1); The output end of the drying system (3) is in one-way communication with the interior of the experimental box (1); The erosion aqueous solution system (4) is in bidirectional communication with the experimental box (1).

2. The dry-wet cycle device for long-term rock bearing test according to claim 1, characterized in that: The pressurizing system (2) includes a pressure applying device (21) and a lower pad (22); The lower pad (22) is arranged on the inner bottom surface of the experimental box (1); The pressure applying device (21) is arranged above the lower pad (22), and a sample placement position is formed between the pressure applying device (21) and the lower pad (22).

3. The dry-wet cycle device for long-term rock bearing test according to claim 1, characterized in that: The erosion aqueous solution system (4) is in bidirectional communication with the bottom of the experimental box (1).

4. The dry-wet cycle device for long-term rock bearing test according to claim 1 or 3, characterized in that: The erosion aqueous solution system (4) further includes a lifting and adjusting device (43); The liquid storage container (41) is installed on the lifting and adjusting device (43).

5. The dry-wet cycle device for long-term rock bearing test according to claim 1 or 3, characterized in that: The erosion aqueous solution system (4) further includes a pH control device; The pH control device includes a pH detection device (44) and an acid-base substance adding device (45); The acid and alkali substance adding device (45) is connected to the erosion aqueous solution system (4); The acid and alkali substance adding device (45) is arranged in the erosion aqueous solution system (4).

6. The dry-wet cycle device for long-term rock bearing test according to claim 1 or 3, characterized in that: The erosion aqueous solution system (4) is connected to the experimental box (1) via a pipeline, and a water pump (46) is provided on the pipeline.

7. The dry-wet cycle device for long-term rock bearing test according to claim 6, characterized in that: Also included is a water pump (46) intelligent control system; The water pump (46) intelligent control system includes a water level controller, a water stop detection device (47) and a water replenishment detection device (48); The water stop detection device (47) and the water replenishment detection device (48) are arranged in the experimental box (1), the water stop detection device (47) is located above the sample, and the water replenishment detection device (48) is located below the sample; The water stop detection device (47), the water replenishment detection device (48) and the water pump (46) are electrically connected to the water level controller respectively.

8. The dry-wet cycle device for long-term rock bearing test according to claim 1, characterized in that: The drying system (3) includes a drying machine (31); an exhaust port of the drying machine (31) is in communication with the experimental box (1).

9. The dry-wet cycle device for long-term rock bearing test according to claim 8, characterized in that: It also includes an intelligent drying control system; The drying intelligent control system includes a temperature control switch (32) and a wind speed control switch (33); The temperature control switch (32) and the wind speed control switch (33) are connected to the drying machine (31).

10. The dry-wet cycle device for long-term rock bearing test according to claim 9, characterized in that: It also includes a relative humidity monitoring device (34), which is arranged in the experimental box (1).

Images