Real-time thermal effect moisture loss monitoring gas permeability measuring device and method

Abstract

The invention relates to the technical field of geotechnical engineering, and discloses a real-time thermal effect moisture loss monitoring gas permeability measuring device and method.The device comprises a testing box body, and the interior of the testing box body is a closed space; the adjusting part is arranged in the test box body and is used for adjusting the temperature and the humidity in the test box body; the measuring assembly comprises a monitoring device and a permeation device, the monitoring end of the monitoring device is fixedly connected with the permeation device through a vertical line, the permeation device is located at the bottom end in the testing box body, and an included angle is formed between the permeation device and the bottom end in the testing box body; the gas injection part is arranged on the test box body, is communicated with the permeation device through the buffer part and is used for injecting gas into the rock sample in the permeation device. According to the invention, the moisture loss of the rock and soil sample under the heat treatment environment is monitored, the moisture loss process is monitored in real time, the dynamic coupling relationship between the real-time water loss state of the sample and the permeability is established, and the understanding demand of the high-temperature effect on the gas-heat-mass coupling mechanism of the porous medium is met.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and in particular to a device and method for real-time monitoring of thermal effect moisture loss and measuring gas permeability. Background Technology

[0002] Existing gas permeability testing systems are generally conducted at room temperature or constant temperature, making it difficult to realistically simulate the permeability evolution of rock samples caused by water loss due to heating in deep geothermal environments or nuclear waste disposal conditions. Although some studies have conducted permeability tests after heating, they generally cannot monitor the water loss process in real time or establish a dynamic coupling relationship between the real-time water loss state of the sample and permeability. Therefore, this further limits the in-depth understanding of the gas-thermal-mass coupling mechanism of porous media under high temperature.

[0003] Therefore, there is an urgent need for a real-time thermal effect moisture loss monitoring device and method for measuring gas permeability to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for real-time monitoring of thermal effect moisture loss and measuring gas permeability, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a real-time thermal effect moisture loss monitoring and gas permeability measurement device, comprising:

[0006] The test chamber has a sealed interior.

[0007] An adjusting element is disposed inside the test chamber, and the adjusting element is used to adjust the temperature and humidity inside the test chamber;

[0008] The measurement component includes a monitoring device and a permeation device. The monitoring end of the monitoring device is fixedly connected to the permeation device via a vertical line. The permeation device is located at the bottom of the test chamber and is at an angle to the bottom of the test chamber.

[0009] A gas injection device is installed on the test chamber. The gas injection device is connected to the permeation device through a buffer and is used to inject gas into the rock sample inside the permeation device.

[0010] According to the present invention, a real-time thermal effect moisture loss monitoring gas permeability measuring device is provided. The permeability device includes a housing, and pressure heads are threadedly connected to both ends of the housing. The rock sample is installed in the housing through the two pressure heads. An air inlet and an air outlet are respectively opened in the two pressure heads. The air inlet is connected to the buffer component.

[0011] According to the present invention, a real-time thermal effect moisture loss monitoring and gas permeability measuring device is provided, wherein permeable stones are provided at both ends of the rock sample, and the diameter of the permeable stones is smaller than the diameter of the rock sample.

[0012] According to the present invention, a real-time thermal effect moisture loss monitoring gas permeability measuring device is provided, wherein the regulating component includes a heating device and a humidity generator, the heating device being used to regulate the temperature inside the test chamber, and the humidity generator being used to regulate the humidity inside the test chamber.

[0013] According to the present invention, a real-time thermal effect moisture loss monitoring gas permeability measuring device is provided, wherein the gas injection component includes a gas cylinder, which is fixedly connected to the outer wall of the test chamber, and the output end of the gas cylinder is connected to the buffer component through a pipe.

[0014] According to the present invention, a real-time thermal effect moisture loss monitoring gas permeability measuring device is provided, wherein the buffer includes a flexible hose, and the two ends of the flexible hose are respectively connected to the pipe and the air inlet.

[0015] According to the present invention, a real-time thermal effect moisture loss monitoring and gas permeability measuring device is provided, wherein the flexible tube has a V-shaped structure.

[0016] According to the present invention, a real-time thermal effect moisture loss monitoring and gas permeability measurement device is provided, wherein a pressure gauge and a valve are installed on the pipeline.

[0017] According to the present invention, a real-time thermal effect moisture loss monitoring gas permeability measuring device is provided, wherein one corner of the pressure head with the air inlet is in contact with the bottom of the test chamber, and the included angle between the pressure head and the bottom of the test chamber is 30°-45°.

[0018] A method for real-time monitoring of thermal moisture loss and measuring gas permeability includes the following steps:

[0019] The permeation device is suspended in the test chamber by the monitoring device, and there is an angle between the permeation device and the bottom of the test chamber.

[0020] The temperature and humidity inside the test chamber are regulated by the regulating component and maintained for at least 0.5 hours;

[0021] The monitoring device is used to obtain the quality data of the permeation device under the above-mentioned temperature and humidity conditions;

[0022] Gas is injected into the permeation device through the gas injection component, and the quality data of the permeation device during the gas injection process is obtained through the monitoring device.

[0023] The water loss of the rock sample was calculated using the obtained mass data.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects:

[0025] 1. This invention provides a real-time thermal effect moisture loss monitoring gas permeability measurement device and method. During use, the temperature and humidity inside the test chamber are adjusted by a regulating component, and gas is injected into the permeation device via a gas injection component. A monitoring device is used to monitor the quality of the permeation device, obtaining the moisture changes of rock samples under different temperatures, humidity levels, and gas conditions. This application enables the monitoring of moisture loss in rock and soil samples under heat treatment conditions, and real-time monitoring of the moisture loss process. It establishes a dynamic coupling relationship between the real-time water loss state of the sample and its permeability, meeting the need for understanding the gas-heat-mass coupling mechanism of porous media under high-temperature conditions.

[0026] 2. The present invention provides a real-time thermal effect moisture loss monitoring gas permeability measurement device and method, wherein the diameter of the permeable stone is smaller than the diameter of the sample, ensuring that the gas enters the sample directly through the inlet without overflowing from the boundary, and the gas flows from the inside of the sample to the outlet, rather than from the surrounding boundary. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the permeation device structure of the present invention;

[0030] The components include: 1. Test chamber; 2. Monitoring device; 3. Permeation device; 31. Shell; 32. Pressure head; 33. Air inlet; 34. Exhaust outlet; 35. Permeable stone; 4. Vertical line; 5. Rock sample; 6. Heating device; 7. Humidity generator; 8. Gas cylinder; 9. Pipeline; 10. Flexible hose. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1-2 This invention provides a real-time thermal effect moisture loss monitoring and gas permeability measurement device, comprising:

[0034] Test chamber 1 has a sealed interior.

[0035] An adjusting component is installed inside the test chamber 1. The adjusting component is used to adjust the temperature and humidity inside the test chamber 1.

[0036] The measuring component includes a monitoring device 2 and a permeation device 3. The monitoring end of the monitoring device 2 is fixedly connected to the permeation device 3 via a vertical line 4. The permeation device 3 is located at the bottom of the test chamber 1 and is set at an angle with the bottom of the test chamber 1.

[0037] The gas injection device is installed on the test chamber 1. The gas injection device is connected to the permeation device 3 through a buffer and is used to inject gas into the rock sample 5 inside the permeation device 3.

[0038] In one embodiment of the present invention, during use, the temperature and humidity inside the test chamber 1 are adjusted by the set adjustment component, and gas is injected into the permeation device 3 by the set gas injection component. The monitoring device 2 is used to monitor the mass of the permeation device 3. The vertical line 4 is a rigid measuring line of fixed length and will not change in length. Therefore, through force analysis, it can be known that the mass monitored in real time is the total mass of the permeation device 3, thereby obtaining the moisture change of the rock sample 5 under different temperatures, humidity and gas conditions.

[0039] As an optional implementation, the permeation device 3 includes a housing 31, with pressure heads 32 threaded to both ends of the housing 31. The rock sample 5 is installed inside the housing 31 through the two pressure heads 32. The two pressure heads 32 are respectively provided with an air inlet 33 and an air outlet 34. The air inlet 33 is connected to a buffer.

[0040] In one embodiment of the present invention, the rock sample 5 is limited and connected to the housing 31 by the pressure head 32, and the two ends are respectively provided with an air inlet 33 and an exhaust outlet 34 for gas flow.

[0041] As an optional implementation, permeable stones 35 are provided at both ends of the rock sample 5, and the diameter of the permeable stones 35 is smaller than the diameter of the rock sample 5.

[0042] In one embodiment of the present invention, permeable stones 35 are connected to both ends of the rock sample 5. The diameter of the permeable stones 35 is slightly smaller than that of the rock sample 5, so that together with the pressure head 32, they can play a side sealing role.

[0043] As an optional implementation, the regulating components include a heating device 6 and a humidity generator 7. The heating device 6 is used to regulate the temperature inside the test chamber 1, and the humidity generator 7 is used to regulate the humidity inside the test chamber 1.

[0044] In one embodiment of the present invention, the heating device 6 is preferably an electric heating device, which heats the inside of the test chamber 1 and adjusts its internal temperature to a specified value. The humidity generator 7 adjusts the humidity inside the test chamber 1 by compressing external air.

[0045] As an optional implementation, the gas injection component includes a gas cylinder 8, which is fixedly connected to the outer wall of the test chamber 1, and the output end of the gas cylinder 8 is connected to the buffer component through a pipe 9.

[0046] In one embodiment of the present invention, gas is supplied to the permeation device 3 through the gas cylinder 8 to realize the change of moisture in the rock sample 5 under the action of gas transmission, and to evaluate the gas permeability of the rock sample 5 in real time.

[0047] As an optional implementation, the buffer includes a flexible hose 10, with both ends of the flexible hose 10 connected to the pipe 9 and the air inlet 33, respectively.

[0048] In one embodiment of the present invention, the flexible hose 10 is used to connect the pipe 9 and the air inlet 33 to buffer the gas delivered by the gas cylinder 8.

[0049] As an optional implementation, the flexible hose 10 has a V-shaped structure.

[0050] In one embodiment of the present invention, the gas input from the gas cylinder 8 is buffered by a V-shaped flexible hose 10. Specifically, the flexible hose 10 can be fixed to the base of the test chamber 1 by a buckle. This part is mainly to prevent it from being stressed, so that all the force is borne by the vertical rod and the grounding structure of the pressure head, ensuring the accuracy of the test and ensuring that the gas delivery process will not have a supporting force on the pressure.

[0051] As an optional implementation, a pressure gauge and a valve are installed on pipe 9.

[0052] In one embodiment of the present invention, the injection of gas is controlled by a valve.

[0053] As an optional implementation, one corner of the pressure head 32 with the air inlet 33 contacts the bottom of the inside of the test chamber 1, and the included angle between the pressure head 32 and the bottom of the inside of the test chamber 1 is 30°-45°.

[0054] In one embodiment of the present invention, the pressure head 32 near the pipe 9 is used to contact the bottom of the inside of the test chamber 1 to support the entire permeation device 3.

[0055] A method for real-time monitoring of thermal moisture loss and measuring gas permeability includes the following steps:

[0056] The permeation device 3 is suspended inside the test chamber 1 via the monitoring device 2, and an angle is formed between the permeation device 3 and the bottom of the test chamber 1.

[0057] The temperature and humidity inside test chamber 1 are regulated by adjusting the adjustment components and maintained for at least 0.5 hours;

[0058] The quality data of the permeation device 3 under the above-mentioned temperature and humidity conditions are obtained by the monitoring device 2;

[0059] Gas is injected into the permeation device 3 through the gas injection component, and the quality data of the permeation device 3 during the gas injection process is obtained through the monitoring device 2.

[0060] The water loss of rock sample 5 was calculated using the obtained mass data.

[0061] In one embodiment of the present invention, when in use, the humidity and temperature conditions to be tested are first determined, and the humidity and temperature inside the test chamber 1 are adjusted by the humidity generator 7 and the heating device 6 respectively to reach the target conditions and maintain them for more than 0.5 hours. During this process, the mass change of the permeation device 3 during the process is obtained by the monitoring device 2. This change is the real-time moisture change of the rock sample 5 under the temperature and humidity conditions.

[0062] Furthermore, the valve is opened, and gas is injected through gas cylinder 8. The gas permeability is measured. This process is a conventional steady-state measurement. During this process, the mass change of monitoring device 2 is the mass change caused by the interaction between gas and water during the gas injection process.

[0063] After the gas permeation test is completed, the real-time moisture loss due to gas migration can be obtained by monitoring the changes in device 2.

[0064] This device can obtain real-time moisture changes of samples under the influence of temperature, humidity, and real-time gas transmission, thereby more accurately evaluating the gas permeability of the sample under real-time conditions.

[0065] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0066] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A real-time thermal effect moisture loss monitoring and gas permeability measurement device, characterized in that, include: The test chamber (1) has a sealed interior. An adjusting element is provided inside the test chamber (1), and the adjusting element is used to adjust the temperature and humidity inside the test chamber (1); The measuring component includes a monitoring device (2) and a permeation device (3). The monitoring end of the monitoring device (2) is fixedly connected to the permeation device (3) via a vertical line (4). The permeation device (3) is located at the bottom inside the test chamber (1) and is set at an angle with the bottom inside the test chamber (1). An injection device is installed on the test chamber (1). The injection device is connected to the permeation device (3) through a buffer and is used to inject gas into the rock sample (5) inside the permeation device (3).

2. The real-time thermal effect moisture loss monitoring and gas permeability measurement device according to claim 1, characterized in that: The permeation device (3) includes a housing (31), and both ends of the housing (31) are threaded with pressure heads (32). The rock sample (5) is installed in the housing (31) through the two pressure heads (32). The two pressure heads (32) are respectively provided with an air inlet (33) and an exhaust outlet (34). The air inlet (33) is connected to the buffer.

3. The real-time thermal effect moisture loss monitoring and gas permeability measurement device according to claim 1, characterized in that: Both ends of the rock sample (5) are provided with permeable stones (35), and the diameter of the permeable stones (35) is smaller than the diameter of the rock sample (5).

4. The real-time thermal effect moisture loss monitoring and gas permeability measurement device according to claim 1, characterized in that: The regulating components include a heating device (6) and a humidity generator (7). The heating device (6) is used to regulate the temperature inside the test chamber (1), and the humidity generator (7) is used to regulate the humidity inside the test chamber (1).

5. The real-time thermal effect moisture loss monitoring and gas permeability measurement device according to claim 2, characterized in that: The gas injection component includes a gas cylinder (8), which is fixedly connected to the outer wall of the test chamber (1). The output end of the gas cylinder (8) is connected to the buffer component through a pipe (9).

6. The real-time thermal effect moisture loss monitoring and gas permeability measuring device according to claim 5, characterized in that: The buffer includes a flexible hose (10), the two ends of which are connected to the pipe (9) and the air inlet (33), respectively.

7. The real-time thermal effect moisture loss monitoring and gas permeability measuring device according to claim 6, characterized in that: The flexible hose (10) has a V-shaped structure.

8. The real-time thermal effect moisture loss monitoring and gas permeability measuring device according to claim 5, characterized in that: A pressure gauge and a valve are installed on the pipeline (9).

9. The real-time thermal effect moisture loss monitoring and gas permeability measuring device according to claim 2, characterized in that: One corner of the pressure head (32) with the air inlet (33) is in contact with the bottom of the inside of the test chamber (1), and the included angle between the pressure head (32) and the bottom of the inside of the test chamber (1) is 30°-45°.

10. A method for real-time monitoring of thermal effect moisture loss and measuring gas permeability, applicable to the real-time thermal effect moisture loss monitoring and gas permeability measuring device described in claim 1, characterized in that, Includes the following steps: The permeation device (3) is suspended inside the test chamber (1) by the monitoring device (3), and there is an angle between the permeation device (3) and the bottom of the test chamber (1). The temperature and humidity inside the test chamber (1) are adjusted by the regulating component and maintained for at least 0.5 hours; The quality data of the permeation device (3) under the above temperature and humidity conditions are obtained through the monitoring device (2); Gas is injected into the permeation device (3) through the gas injection component, and the quality data of the permeation device (3) during the gas injection process is obtained through the monitoring device (2); The water loss of the rock sample (5) was calculated using the obtained mass data.

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