Load temperature control dry-wet coupling experiment device for easily disintegrated rock

Abstract

The invention relates to the technical field of rock experiments, in particular to an easily disintegrated rock load temperature control dry-wet coupling experiment device which comprises a base and a machine body, the machine body is provided with a controller and a moisture content detection device, the bottom end of the machine body is fixedly connected with the top of the base, the machine body is hollow, and the controller is connected with the moisture content detection device. A rock sample adding device is arranged in the machine body, the machine body is provided with a glass door, the glass door is positioned on any side of the machine body, and the glass door is movably connected with the machine body; a load loading device is arranged in the machine body, and the pressurizing device is connected with an air pump; the load pressurizing device is provided with a load loading pipeline; the load loading device is connected with the rock sample adding device through a load loading pipeline; the load loading device is connected with the steam engine through a pipeline; the load loading device is provided with an air pump which is connected with the load loading device through a pipeline; the machine body is further provided with a dry cooling machine which is connected with the cold drying machine through a pipeline; and the freezing dryer is connected with the steam engine through a pipeline.

Description

Technical Field

[0001] The present invention relates to the field of rock experiment technology, in particular to a temperature-controlled dry-wet coupling experimental device for easily disintegrated rocks. Background Art

[0002] Wet-dry cycling is a common experimental method for studying rock mechanical properties. Specifically, when studying the mechanical properties of rock under axial load, a uniaxial dry-wet cycle test is often used. The rock sample is immersed in water for 48 hours, then removed. The sample is then placed in a drying oven and dried at 45°C for 24 hours before being removed. This is a "dry-saturation" cycle. The rock sample undergoes several wet-dry cycles before its mechanical properties are tested. A problem with this experimental method is that it fails to account for the effects of temperature fluctuations and pressure applied to the rock under natural conditions during the wet-dry cycle on its mechanical properties. Furthermore, in traditional wet-dry cycle experiments, due to differences in the mineral composition and degree of weathering of different rocks, water saturation can lead to varying degrees of disintegration, resulting in particle loss or cracking in the rock sample. This can lead to larger-scale disintegration if no measures are taken. Consequently, internal stresses and stress distribution within the rock can rapidly change during the disintegration process. These issues affect the accuracy of the experimental data.

[0003] Existing technical solutions primarily involve enclosing easily disintegrating sandstone in a container with permeable holes, such as a permeable container device (Announcement No. CN204495635U), which includes a mold, a clamping device, and a permeable block. This device is suitable for dry-wet cycling experiments on disintegrating rock. The device protects the integrity of the rock sample after disintegration, preventing it from breaking apart and breaking into pieces, or minimizing the amount of detached particles that fall around the sample. However, it does not limit the deformation and disintegration of the rock sample during the dry-wet cycling process. Nor does it address the inaccuracy of experimental data caused by temperature fluctuations and the pressureless environment during the dry-wet cycling process. Therefore, these issues urgently need to be addressed. Summary of the Invention

[0004] In order to solve the above problems, the present invention aims to provide a temperature-controlled dry-wet coupling experimental device for easily disintegrated rock loads. The device comprises:

[0005] The base and the body are provided with a controller and a moisture content detection device. The bottom end of the body is fixedly connected to the top of the base. The interior of the body is hollow. The interior of the body is provided with a rock sample adding device. The body has a glass door. The glass door is located on either side of the body and is movably connected to the body.

[0006] Furthermore, the body is provided with a load loading device, and the pressurizing device is connected to an air pump; the load pressurizing device has a load loading pipeline, and the load loading device is connected to the rock sample adding device through the load loading pipeline.

[0007] Furthermore, the load loading device is connected to the steam engine through a pipeline; the load loading device has an air pump, which is connected to the load loading device through a pipeline.

[0008] Furthermore, the machine body has a dry cooler connected to the cold dryer through a pipeline; the cold dryer is connected to the steam engine through a pipeline.

[0009] Furthermore, the body comprises a temperature controller, which includes at least two temperature sensors. The temperature sensors are located within the rock sample addition device, specifically on the inner wall of the outer cylinder. In the present invention, four temperature sensors are preferably provided, with two temperature sensors mounted symmetrically at the bottom of the inner wall of the outer cylinder, and two additional temperature sensors mounted symmetrically at the top of the inner wall. The temperature controller transmits data to the controller, which displays temperature values and averages at different locations, allowing the experimenter to easily monitor the real-time temperature of the experiment.

[0010] Furthermore, the moisture content detection device includes at least two humidity sensors located on the inner wall of the inner cylinder. Preferably, there are two humidity sensors, located symmetrically at the top and bottom of the inner cylinder. The moisture content detection device transmits the acquired humidity data to a controller, which displays the humidity value of the rock sample in the inner cylinder, allowing experimenters to monitor the real-time humidity.

[0011] Furthermore, the cold dryer is a vacuum pump, and the vacuum pump is a miniature vacuum pump, which adopts a miniature diaphragm vacuum pump. The vacuum pump is set. First, vacuum extraction can be carried out on the rock sample at the beginning of the experiment to improve the saturation of subsequent rock samples. Secondly, the dryness and wetness of the rock sample in the rock sample adding device can be adjusted according to the experimental needs, thereby simulating the dryness and wetness of the rock sample under the day and night cycle in the natural state, which is conducive to obtaining more realistic data in the experiment.

[0012] Furthermore, the rock sample adding device is composed of a protective tube and an embedded structure, and the specific embedded structure includes: an outer tube, an inner tube, and an air pressure diverter; the protective tube is fixedly connected to the base; the inner bottom of the protective tube has an annular groove, and the outer tube can be fixed on the annular groove by rotation, and the top of the outer tube has a circular hole.

[0013] Furthermore, the inner cylinder wall is evenly distributed with air holes, and the top of the inner cylinder is provided with an air pressure diverter, which is connected to the load-applying pipe via the circular hole at the top of the outer cylinder. The air pressure diverter comprises a first diverter pipe, a second diverter pipe, a cylinder, and a pneumatic piston. The air pressure in the first diverter pipe flows to the gap between the inner and outer cylinders, providing annular pressure, while the air pressure in the second diverter pipe flows to the cylinder, pushing the pneumatic piston and providing axial pressure to the top of the inner cylinder. This arrangement allows for both annular and axial pressure on the rock sample, better simulating the pressure environment of the rock sample in a natural environment, and making the data obtained from the experiment more accurate and effective.

[0014] Furthermore, the inner cylinder has a rock sample fixing structure, specifically, there is a raised cylinder in the inner cylinder corresponding to the bottom of the base, and there is an annular protrusion at the connection between the cylinder and the bottom of the base.

[0015] Furthermore, the load-loading pipe is a hose.

[0016] Beneficial technical effects of the present invention:

[0017] 1. The saturation degree of the sample can be improved by vacuum saturating the rock sample with a cold dryer.

[0018] 2. After adding the rock sample inside the machine body, start the steam engine to input high-temperature water vapor into the machine body. The air pump generates air pressure after pressurization, replacing the traditional oil pressure equipment, to pressurize the rock sample in the axial and circumferential directions and provide corresponding humidity and temperature. When the moisture content of the experimental rock sample reaches the preset value of the experiment, the cold dryer extracts the water vapor in the machine body. This is repeated to achieve the purpose of dry-wet cycle, which not only improves the experimental efficiency, but also effectively simulates the stress conditions and temperature, humidity and pressure changes under natural conditions, making the experimental data more valuable.

[0019] 3. The water vapor extracted from the cold dryer can be condensed and input into the industrial steam engine through the pipeline to achieve the reuse of water resources. It is not only convenient and fast during the experiment, but also environmentally friendly.

[0020] 4. By connecting the temperature and humidity controller and the load sensor through a computer, a multi-purpose effect of one device can be achieved. Specifically, the temperature-controlled dry-wet coupling experimental device for easily disintegrated rock loads described in the present invention can meet the requirements of dry-wet cycle experiments under different moisture contents, different temperature environments, and different load conditions. The humidity, temperature, and load are preset by the computer and automatically cycled, meeting the needs of different experiments under different experimental properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of the temperature-controlled dry-wet coupling experimental device for easily disintegrated rock loads according to the present invention;

[0022] Figure 2 This is a schematic structural diagram of the rock sample adding device of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection between the protective tube and the base of the present invention;

[0024] Figure 4 This is a cross-sectional view of the annular groove connecting the protective tube and the base of the present invention;

[0025] Figure 5 Schematic diagram of the air pressure diversion device of the present invention;

[0026] Figure 6 This is the inner cylinder rock sample fixing structure of the present invention.

[0027] Markings in the figure: 101 base; 102 machine body; 103 glass door; 104 temperature controller; 105 load-loading pipe; 106 rock sample adding device; 106-1 protective cylinder; 106-2 outer cylinder; 106-3 inner cylinder; 106-31 raised cylinder; 106-32 annular protrusion; 106-4 air pressure diverter; 106-5 annular groove; 106-41 first diversion pipe; 106-42 second diversion pipe; 106-43 cylinder; 106-44 pneumatic piston; 107 pipe; 108-1 pipe; 108-2 pipe; 109 load-loading device; 2 steam engine; 201 pipe; 3 dry cooler; 4 air pump. DETAILED DESCRIPTION

[0028] In order to further understand the present invention, the present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] In the description of the present invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] like Figures 1 to 4 As shown, a base 101 and a body 102 are provided, wherein the body 102 has a controller and a moisture content detection device, the bottom end of the body 102 is fixedly connected to the top of the base 101, the interior of the body 102 is hollow, and a rock sample adding device 106 is provided inside the body 102, and the body 102 has a glass door 103, which is located on either side of the body 102 and is movably connected to the body 102.

[0032] The body 102 has a load loading device 109 inside, and the pressurizing device 109 is connected to the air pump 4; the load pressurizing device 109 has a load loading pipeline 105.

[0033] The load-loading device 109 is connected to the rock sample adding device 106 via the load-loading pipe 105 , and is connected to the steam engine via the pipe 108 - 2 . The load-loading device 109 includes an air pump 4 , which is connected to the load-loading device 109 via the pipe 107 .

[0034] The machine body 102 has a dry cooler 3, which is connected to the dry cooler 3 via a pipe 108-1; the dry cooler 3 is connected to the steam engine 2 via a pipe 201.

[0035] The housing 102 includes a temperature controller 104, which includes temperature sensors located within the rock sample addition device 106. Four temperature sensors are installed, two symmetrically at the bottom of the inner wall of the outer cylinder, and two additional symmetrically at the top of the inner wall. The temperature controller transmits data to the controller, which displays the temperature values at different locations and their averages. Furthermore, the moisture content detection device includes humidity sensors. In this embodiment, there are two humidity sensors, located symmetrically at the top and bottom of the inner wall. The moisture content detection device transmits data to the controller.

[0036] The cold dryer 3 is a vacuum pump. The vacuum pump is a micro vacuum pump, and in this embodiment, a micro diaphragm vacuum pump is specifically used.

[0037] The rock sample adding device 106 is composed of a protective cylinder 106 - 1 and a nested structure. The nested structure specifically includes: an outer cylinder 106 - 2 , an inner cylinder 106 - 3 , and an air pressure diverter 106 - 4 .

[0038] The protective tube 106-1 is fixedly connected to the base 101; the inner bottom of the protective tube 106-1 has an annular groove 106-5, the outer tube 106-2 can be fixed on the annular groove 106-5 by rotation, and the top of the outer tube 106-2 has a circular hole; the air holes are evenly distributed on the wall of the inner tube 106-3, and the top of the inner tube 106-3 has an air pressure diverter 106-4, and the air pressure diverter 106-4 is connected to the load loading pipe 105 through the circular hole on the top of the outer tube 106-2.

[0039] The pneumatic diversion device 106-4 comprises a first diversion pipe 106-41, a second diversion pipe 106-42, a cylinder 106-43, and a pneumatic piston 106-44. The pneumatic pressure in the first diversion pipe 106-41 flows to the gap between the inner and outer cylinders, providing annular pressure. The pneumatic pressure in the second diversion pipe 106-42 flows to the cylinder 3, pushing the pneumatic piston 4 and providing axial pressure to the top of the inner cylinder 106-3.

[0040] The inner cylinder 106-3 has a rock sample fixing structure, specifically a raised cylinder 106-31 within the inner cylinder corresponding to the bottom of the base. The connection between the cylinder 106-31 and the bottom of the base is provided by an annular protrusion 106-32. The load-bearing pipe 105 is a flexible hose, specifically made of PEEK, which has a certain degree of heat resistance and is suitable for long-term use at high temperatures.

[0041] Working principle:

[0042] Take a section of rock sample rubber membrane. The rubber membrane is a rubber fiber woven elastic mesh membrane, sealed at the top and open at the bottom. The rubber membrane has a certain degree of ductility and air permeability. The rubber membrane is longer than the inner cylinder. Place the rubber membrane in a laboratory measuring cylinder with the same diameter and height as the inner cylinder 106-3. Slide the rubber membrane over the inner wall of the laboratory measuring cylinder and add rock sample to the rubber membrane until the height of the added rock sample is roughly the same as the height of the laboratory measuring cylinder. Remove the rubber membrane with the rock sample and place it on the inner cylinder 106-3. Slide the excess rubber membrane edge over the cylinder and secure the excess rubber membrane edge to the corresponding annular protrusion using a ring buckle, thereby securing the rubber membrane containing the rock sample.

[0043] Move the nesting structure downward until the inner cylinder 106-3 completely covers the rock sample and the bottom of the outer cylinder 106-2 contacts the bottom of the protective cylinder 106-1. Rotate the outer cylinder 106-2 to fix the nesting structure on the annular groove 106-5.

[0044] Turn on the controller switch of the machine body 102, and use the controller to pneumatically operate the dry cooler 3 to vacuum extract the rock sample. After completing the above experimental steps, set the temperature and humidity according to the experimental requirements, and start the experimental device. The air pump 4 supplies high-pressure gas to the load-loading device 109, and the steam engine 2 provides steam to the load-loading device 109. The high-pressure gas and steam are loaded into a compressed gas with a certain temperature and humidity by the load-loading device 109, and then flow through the load-loading pipeline 105 to the pressure diverter 106-4. The pressure diverter 106-4 controls the air pressure by adjusting the air valve to flow to the first diverter pipeline 106-41 and the second diverter pipeline 106-42. The diverter pipeline outlet is located in the interlayer between the outer cylinder 106-2 and the inner cylinder 106-3. The air pressure fills the interlayer and provides annular pressure to the rock sample through the air vents on the inner cylinder 106-2. The air pressure in the second branch pipe 106 - 42 flows to the cylinder 3 , pushing the pneumatic piston 4 and providing axial pressure to the top of the inner cylinder 106 - 3 .

[0045] During the experiment, the temperature and humidity changes of the rock samples were recorded in real time through temperature sensors and humidity sensors, and the opening and closing of the cold dryer 3 and the steam engine 2 were controlled to achieve temperature and dry-wet cycle coupling.

[0046] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature-controlled dry-wet coupling experimental device for easily disintegrated rock loads, comprising: A base (101) and a body (102), wherein the body (102) has a controller and a moisture content detection device, and the bottom end of the body (102) is fixedly connected to the top of the base (101), characterized in that: The body (102) is hollow inside, and a rock sample adding device (106) is provided inside the body (102). The body (102) has a glass door (103), and the glass door (103) is located on either side of the body (102). The glass door (103) is movably connected to the body (102); The machine body (102) has a load loading device (109) inside, and the pressurizing device (109) is connected to an air pump (4); the load pressurizing device (109) has a load loading pipe (105); The load loading device (109) is connected to the rock sample adding device (106) via the load loading pipe (105); The load-applying device (109) is connected to the steam engine (2) via a pipeline (108-2); The load-loading device (109) comprises an air pump (4) connected to the load-loading device (109) via a pipeline (107); The machine body (102) has a dry cooler (3), which is connected to the dry cooler (3) via a pipeline (108-1); the dry cooler (3) is connected to the steam engine (2) via a pipeline (201).

2. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 1, characterized in that: The machine body (102) has a temperature controller (104); the temperature controller has temperature sensors, there are at least two temperature sensors, and the temperature sensors are located in the rock sample adding device (106).

3. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 1, characterized in that: The moisture content detection device has a humidity sensor, and there are at least two humidity sensors.

4. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 1, characterized in that: The cold dryer (3) is a vacuum pump.

5. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 4, characterized in that: The vacuum pump is a miniature vacuum pump, which adopts a miniature diaphragm vacuum pump.

6. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 1, characterized in that: The rock sample adding device (106) is composed of a protective cylinder (106-1) and a nested structure, wherein the nested structure includes an outer cylinder (106-2), an inner cylinder (106-3), and an air pressure diverter (106-4); The protective tube (106-1) is fixedly connected to the base (101); the inner bottom of the protective tube (106-1) is provided with an annular groove (106-5); the outer tube (106-2) can be fixed on the annular groove (106-5) by rotation; the top of the outer tube (106-2) is provided with a circular hole; The inner cylinder (106-3) has air holes evenly distributed on its wall. The top of the inner cylinder (106-3) is provided with an air pressure diverter (106-4). The air pressure diverter (106-4) is connected to the load-loading pipe (105) through the circular hole at the top of the outer cylinder (106-2). The air pressure diversion device (106-4) comprises a first diversion pipe (106-41), a second diversion pipe (106-42), a cylinder (106-43), and a pneumatic piston (106-44); The air pressure of the first branch pipe flows to the gap between the inner cylinder and the outer cylinder to provide annular pressure, and the air pressure of the second branch pipe flows to the cylinder (3), pushing the pneumatic piston (4) to provide axial pressure to the top of the inner cylinder (106-3).

7. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 6, characterized in that: The inner cylinder (106-3) has a rock sample fixing structure, specifically a raised cylinder (106-31) corresponding to the bottom of the base in the inner cylinder, and an annular protrusion (106-32) is provided at the connection between the cylinder (106-31) and the bottom of the base.

8. The temperature-controlled dry-wet coupling experimental device for easily disintegrated rock load according to claim 1, characterized in that: The load-loading pipe (105) is a hose.

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