High-temperature and high-pressure concrete curing kettle experimental device and control method

Abstract

The invention provides a high-temperature and high-pressure concrete curing kettle experiment device and a control method, and the device comprises a curing kettle which is used for placing a concrete sample embedded with a sensing assembly. A heating device and a pressurizing device are arranged on the outer side wall of the curing kettle and are respectively used for heating and pressurizing the interior of the curing kettle, so that the interior of the curing kettle is in a high-temperature and high-pressure environment required by an experiment; and detecting the internal temperature value and stress value of the concrete sample under the temperature and pressure required by the experiment. By utilizing the device disclosed by the invention, the internal temperature value and the stress value can be obtained, and the change of the internal temperature value and the stress value of the concrete sample along with time in a high-temperature and high-pressure environment can be conveniently analyzed, so that the mechanical property and the durability of the concrete can be obviously influenced by the high-ground-temperature and high-hydraulic-pressure environment under a deep stratum; therefore, potential safety hazards generated in the construction process can be eliminated.

Description

Technical Field

[0001] This invention generally relates to the field of concrete curing autoclave technology, and specifically to a high-temperature and high-pressure concrete curing autoclave experimental device and control method. Background Technology

[0002] Under the strategic requirements of national water network construction and clean energy development in the Yalong River Basin, hydropower development in western my country is advancing towards deeper and larger-scale underground engineering projects. Compared to shallow-buried underground engineering, deep underground engineering faces more complex and variable working conditions, including challenges such as high ground temperature and high hydraulic pressure. Scientifically understanding the engineering performance of concrete under the coupled effects of high ground temperature and high pressure is crucial to ensuring the long-term stable operation of deep underground engineering projects.

[0003] Currently, most concrete construction sites are located in environments with normal temperature and pressure; therefore, conventional concrete curing conditions and performance tests are also conducted indoors under normal temperature and pressure. Since concrete has never been constructed in a high-temperature and high-pressure environment, the performance evolution of concrete under the coupled effects of deep geothermal high temperature and high hydraulic pressure is not yet clear in existing technologies.

[0004] The high temperature and high hydraulic pressure environment in deep strata can significantly affect the mechanical and durability properties of concrete, leading to unpredictable safety hazards and potentially posing a huge threat to the safe operation of deep underground engineering projects. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a high-temperature and high-pressure concrete curing autoclave experimental device and control method.

[0006] On one hand, the present invention provides a high-temperature and high-pressure concrete curing autoclave experimental device, comprising: A curing vessel, wherein the interior of the curing vessel has a first space for placing a concrete sample; a sensing component is pre-embedded inside the concrete sample; A heating device is installed on the outer wall of the curing vessel to heat the first space and bring the concrete sample to the temperature required for the experiment. A pressurizing device, which is connected to the first space, is used to provide pressure to the first space so that the concrete sample can withstand the pressure required for the experiment. A data processing device, which is detachably electrically connected to the sensing component, is used to detect the internal temperature and stress values ​​of the concrete sample under the temperature and pressure required for the experiment through the sensing component.

[0007] According to the technical solution provided by the present invention, the curing tank includes: The curing vessel body has the first space inside and has a first opening; A cover, which is detachably installed at the first opening, is used to isolate the first space from the external space.

[0008] According to the technical solution provided by the present invention, the heating device includes: A heater, which is fixedly installed on the outer wall of the curing tank body; A temperature controller is installed on the curing vessel body to detect the temperature inside the first space and the temperature outside the space, and to control the heater to heat the first space based on the temperature inside the first space and the temperature outside the space.

[0009] According to the technical solution provided by the present invention, the pressurizing device includes: A pressurizing pump body, which is connected to the first space, is used to inject liquid into the first space to provide pressure for the concrete sample. A pressure controller is installed on the cover to detect the pressure in the first space and control the pressurizing pump to adjust the pressure in the first space according to the pressure in the first space.

[0010] According to the technical solution provided by the present invention, the pressurizing device further includes: A safety valve is installed on the cover and connects the first space with the external space, used to depressurize the first space.

[0011] According to the technical solution provided by the present invention, the sensing component includes: The third temperature sensor and the vibrating wire strain sensor; The third temperature sensor is used to detect the internal temperature value of the concrete sample under the temperature and pressure required for the experiment; the vibrating wire strain sensor is used to detect the stress value of the concrete sample under the temperature and pressure required for the experiment. The third temperature sensor and the vibrating wire strain sensor are each electrically connected to a first aviation plug; the first aviation plug is located on the outer surface of the concrete sample; the data processing device is electrically connected to a plurality of second aviation plugs for connecting to a plurality of first aviation plugs. After the first aviation plug and the second aviation plug are plugged into each other, the sensing component and the data processing device are electrically connected.

[0012] On the other hand, the present invention provides a high-temperature and high-pressure concrete curing autoclave experimental device and a control method thereof, applicable to any one of the above-mentioned high-temperature and high-pressure concrete curing autoclave experimental devices, comprising: Prepare a concrete sample; the concrete sample has a sensing component pre-embedded inside. The concrete sample was placed in the first space of the curing tank; The sensing component and the data processing device are electrically connected; The heating device is controlled to heat the first space, so that the concrete sample is at the temperature required for the experiment. The pressurization device is controlled to provide pressure to the first space, so that the concrete sample can withstand the pressure required for the experiment; The data processing device uses the sensing components to detect the internal temperature and stress values ​​of the concrete sample under the required temperature and pressure conditions for the experiment.

[0013] According to the technical solution provided by the present invention, the preparation of concrete samples includes: Obtain the volume of the concrete sample required for the experiment to obtain the first volume; The first liquid level of the fluid concrete in the mold after the first volume of ... Select a sensing component with a corresponding wire length based on the first liquid level; The sensing component is suspended inside the mold, so that the lower end of the sensing component 3 in the vertical direction is immersed in the fluid concrete, and the height of the end connected to the data processing device is greater than the first liquid level. After the mold is sealed, the mold and the concrete inside serve together as a concrete sample.

[0014] According to the technical solution provided by the present invention, controlling the heating device to heat the first space, so that the concrete sample is at the temperature required for the experiment, includes: Obtain the target experimental temperature required for the experiment; Obtain the ambient temperature of the external space, as well as the experimental temperature within the first space; Calculate the ambient temperature difference correction term based on the ambient temperature and the experimental temperature; Based on the environmental temperature difference correction term, the heating device is controlled to heat the first space until the temperature in the first space equals the target experimental temperature.

[0015] The beneficial effects of this invention are as follows: A high-temperature and high-pressure concrete curing autoclave experimental device is designed, comprising a curing autoclave for placing a concrete sample pre-embedded with sensing components. A heating device and a pressurizing device are installed on the outer wall of the curing autoclave to heat and pressurize the interior, respectively, creating the required high-temperature and high-pressure environment. The internal temperature and stress values ​​of the concrete sample under the required temperature and pressure are then detected using the electrically connected sensing components and data processing device. This device allows for the determination of internal temperature and stress values, facilitating the analysis of changes in these values ​​over time under high-temperature and high-pressure conditions. This reveals that the high geothermal and hydraulic pressure environments deep underground significantly affect the mechanical and durability properties of concrete, enabling the elimination of potential safety hazards during construction. Attached Figure Description

[0016] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of a high-temperature and high-pressure concrete curing autoclave experimental device. Figure 2 for Figure 1 A magnified view of a section at point A in the middle; The components include: 1. Curing vessel; 2. Concrete sample; 3. Sensing components; 4. Curing vessel body; 5. First opening; 6. Cover; 7. Heater; 8. Temperature controller; 9. Pressurization pump body; 10. Pressure controller; 11. Safety valve; 12. First aviation connector; 13. Second aviation connector; 14. PLC; 15. Computer; 16. High-strength alloy bolts; 17. First temperature sensor; 18. First controller. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1 refer to Figure 1 This invention provides a high-temperature and high-pressure concrete curing autoclave experimental device and control method, comprising: Curing vessel 1, the curing vessel 1 has a first space inside for placing concrete sample 2; the concrete sample 2 has a sensing component 3 pre-embedded inside. It should be noted that concrete sample 2 includes the mold and the concrete inside the mold in a fluid state. The concrete inside the mold is in a fluid state before the experiment, but may solidify after the experiment.

[0020] A heating device is installed on the outer wall of the curing vessel 1 to heat the first space and bring the concrete sample 2 to the temperature required for the experiment. A pressurizing device, which is connected to the first space, is used to provide pressure to the first space so that the concrete sample 2 can withstand the pressure required for the experiment; A data processing device is detachably electrically connected to the sensing component 3, and is used to detect the internal temperature and stress values ​​of the concrete sample 2 under the temperature and pressure required for the experiment through the sensing component 3.

[0021] Specifically, the data processing device includes: computer 15 and PLC 14 (PLC is a programmable controller). The sensing component 3 includes: a third temperature sensor and a vibrating wire strain sensor.

[0022] The third temperature sensor is used to detect the internal temperature value of concrete sample 2 under the temperature and pressure required for the experiment.

[0023] The vibrating wire strain sensor is used to detect the stress value of concrete specimen 2 under the temperature and pressure required for the experiment.

[0024] In some embodiments, the curing vessel 1 is a cylinder with an internal diameter of 400 mm and a height of 500 mm. The curing vessel 1 mainly adopts a radial sealing structure, wherein a high-strength sealing rubber ring is arranged at the bottom of the cover 6 to ensure complete sealing, and a ring of 16 high-strength bolt holes is arranged at the top of the cover 6. The cover 6 and the curing vessel body 4 are quickly opened and closed by an auxiliary lifting ring device.

[0025] The device of this invention can be used to determine the internal temperature and stress values, which facilitates the analysis of the changes in the internal temperature and stress values ​​of concrete samples over time under high temperature and high pressure conditions. This allows us to understand that the high geothermal and hydraulic pressure environment deep underground significantly affects the mechanical and durability properties of concrete, thus eliminating potential safety hazards during construction.

[0026] Furthermore, the curing tank 1 includes: The curing vessel body 4 has the first space inside and a first opening 5. The cover 6 is detachably installed at the first opening 5 to isolate the first space from the external space.

[0027] Specifically, the curing vessel body 4 is detachably connected to the cover 6 near the first opening 5 by high-strength alloy bolts 16.

[0028] Before the experiment, the cover 6 was removed from the curing vessel body 4, and the concrete sample 2 was placed into the first space; then the sensing component 3 and the data processing device were electrically connected; finally, the cover 6 and the curing vessel body 4 were fixed with high-strength alloy bolts 16.

[0029] This makes the connection between the curing vessel body 4 and the cover 6 tighter, which is sufficient to withstand the high pressure in the first space; and avoids the curing vessel body 4 and the cover 6 from separating due to loose connection when high pressure is generated in the first space.

[0030] Furthermore, the heating device includes: Heater 7, which is fixedly installed on the outer side wall of the curing tank body 4; Temperature controller 8 is installed on the curing vessel body 4 and is used to detect the temperature inside the first space and the temperature outside the space, and control the heater to heat the first space according to the temperature inside the first space and the temperature outside the space.

[0031] Specifically, the heater 7 is installed on the outer wall of the curing vessel body 4, thereby heating the first space from multiple directions and providing heating efficiency.

[0032] Temperature controller 8 includes: The first temperature sensor 17 is located on the outer wall of the curing vessel body 4 near the heater 7; in this embodiment, the first temperature sensor 17 is a resistance temperature sensor. The second temperature sensor is located in the curing tank body 4 away from the heater 7 and is used to detect the external ambient temperature. A first controller 18 is electrically connected to a first temperature sensor 17 and a second temperature sensor, and is used to control the heater 7 to heat the first space according to the temperature inside the first space and the temperature of the external space.

[0033] The first temperature sensor 17 is used to detect the temperature in the first space, and the first controller 18 then controls the heating power of the heater 7 according to the temperature in the first space. When the temperature in the first space is much lower than the temperature required for the experiment, the power of the heater 7 is increased, thereby causing the temperature in the first space to rise rapidly to the temperature required for the experiment.

[0034] By utilizing the closed-loop feedback control formed between the first temperature sensor 17 and the first controller 18, the temperature within the first space can be controlled relatively accurately.

[0035] Furthermore, the pressurizing device includes: A pressure pump body 9 is connected to the first space and is used to inject liquid (generally water) into the first space to provide pressure for the concrete sample. A pressure controller 10 is installed on the cover 6 to detect the pressure in the first space and control the pressurizing pump to adjust the pressure in the first space according to the pressure in the first space.

[0036] Specifically, the pressure controller includes a pressure sensor and a second controller.

[0037] The pressure sensor is installed on the side wall of the curing vessel body 4 to detect the pressure in the first space. The second controller is electrically connected to the pressure sensor and is used to control the pressurizing pump (9) to adjust the pressure in the first space according to the pressure detected by the pressure sensor. This enables automatic adjustment of the pressure in the first space, facilitating the formation of the required experimental environment in the first space.

[0038] Safety valve 11 is installed on the cover 6 and connects the first space with the external space, and is used to depressurize the first space.

[0039] Specifically, a control valve is also installed on the pipeline connecting the pressurized pump body 9 and the first space. During the process of injecting liquid into the first space, the control valve is opened; when the pressure controller 10 detects that the pressure in the first space has reached the pressure required for the experiment, the control valve is closed to maintain the pressure in the first space.

[0040] In this embodiment, hydraulic loading technology is used to apply pressure, effectively converting mechanical energy into pressure energy. This pressure loading method is more in line with the real pressure environment.

[0041] To ensure the safety and controllability of the experimental process, the curing vessel 1 is also equipped with a pressure controller 10 and a safety valve 11. When the hydraulic pressure inside the first space exceeds the preset safety threshold (generally less than the maximum pressure value that the curing vessel 1 can withstand), the safety valve 11 will automatically open to achieve rapid unloading protection under overpressure conditions.

[0042] Further, refer to Figure 2 The third temperature sensor and the vibrating wire strain sensor are respectively electrically connected to the first aviation plug 12; the first aviation plug 12 is located on the outer surface of the concrete sample 2; the data processing device is electrically connected to a plurality of second aviation plugs 13 for connecting to a plurality of first aviation plugs 12. After the first aviation plug 12 and the second aviation plug 13 are plugged into each other, the sensing component 3 is electrically connected to the data processing device.

[0043] Specifically, in this embodiment, both the first aviation plug 12 and the second aviation plug 13 are waterproof aviation plugs.

[0044] The first aviation plug 12 is a component pre-embedded in the concrete sample 2 during the preparation process. If the concrete solidifies after the experiment, it will not be removed from the solidified concrete.

[0045] Therefore, in order to detect the internal temperature and stress values ​​of concrete sample 1 during the experiment and to remove concrete sample 2 from curing kettle 1 after the experiment, this embodiment adopts an aviation plug to connect the sensing component 3 and the data processing device, which facilitates assembly before the experiment and disassembly after the experiment.

[0046] Example 2 The present invention also provides a control method for a high-temperature and high-pressure concrete curing autoclave experimental device, applicable to any one of the above-described high-temperature and high-pressure concrete curing autoclave experimental devices, comprising: S1: Prepare concrete sample 2; a sensing component 3 is pre-embedded inside the concrete sample 2; The specific steps include: S1-1: Obtain the volume of concrete required for the experiment, thus obtaining the first volume; S1-2: The first liquid level of the fluid concrete in the mold after the first volume of ... Since the bottom area of ​​the mold can be obtained through conventional measurement and calculation, in this embodiment, the first liquid level can be obtained by calculating the ratio of the first volume to the bottom area of ​​the mold.

[0047] S1-3: Select a sensing component 3 with a corresponding wire length according to the first liquid level; The specific process is as follows: obtain the maximum height inside the mold; calculate the difference between the maximum height inside the mold and the first liquid level; select a sensing component 3 with a length greater than the difference; S1-4: Suspend the sensing component 3 inside the mold, so that the lower end of the sensing component 3 in the vertical direction is immersed in the fluid concrete, and the height of the end connected to the data processing device (second aviation plug 13) is greater than the first liquid level. S1-5: After sealing the mold, the mold and the concrete inside together serve as concrete sample 2.

[0048] Specifically, the above steps can be understood as follows: First, calculate the difference between the maximum height inside the mold and the first liquid level; Select a sensing component 3 with a wire length greater than the difference; one end of the sensing component 3 has a third temperature sensor and a vibrating wire strain sensor, and the other end has a first aviation plug 12. The distance between the two ends of the sensing component 3 is greater than the difference.

[0049] Then, the first aviation plug 12 is fixedly installed on the upper side wall of the mold, and the first aviation plug 12 penetrates through the upper side wall of the mold; Ultimately, this enables the first aviation plug 12 to connect to the outside world and seals the mold (for example, by installing a sealing ring at the location where the first aviation plug 12 is installed; if other parts of the mold are not sealed, they are also sealed accordingly) to prevent water leakage during the experiment.

[0050] Based on the above steps, a concrete sample 2 with an internally embedded sensing component 3 can be obtained, and a portion of the second aviation plug 13 is exposed outside the outer surface of the concrete sample 2. During the experiment, the first aviation plug 12, which is electrically connected to the data processing device, can be electrically connected to the second aviation plug, thereby enabling the detection function to be completed during the experiment.

[0051] S2: The concrete sample 2 is placed in the first space of the curing tank 1; In this embodiment, the volume of the first space is greater than twice the volume of the first volume, and the length, width, and height of the first space are all greater than twice the length, width, and height of the concrete sample 2, respectively. This allows the two concrete samples 2 to be placed within the first space.

[0052] During the experiment, two concrete samples 2 were used, each with a third temperature sensor and a vibrating wire strain sensor pre-embedded inside. Both concrete samples 2 were then placed simultaneously in the first space, allowing for the simultaneous detection of two types of data during the experiment, thus improving the utilization rate of the experiment.

[0053] S3: Electrically connect the sensing component 3 and the data processing device; and connect the cover 6 and the curing tank body 4 using high-strength alloy bolts 16; In this embodiment, the electrical connection between the sensing component 3 and the data processing device is achieved by plugging in the first aviation plug 12 and the second aviation plug 13.

[0054] By using high-strength alloy bolts 16 to connect the cover 6 and the curing vessel body 4, the curing vessel 1 as a whole can have high strength, which is sufficient to withstand the pressure in the first space.

[0055] S4: Includes S4-1 and S4-2; S4-1: Controlling the heating device to heat the first space, so that the concrete sample 2 is at the temperature required for the experiment, including: Obtain the target experimental temperature required for the experiment; Obtain the ambient temperature of the external space, as well as the temperature of the water within the first space; Calculate the ambient temperature difference correction term based on the ambient temperature and the experimental temperature; Based on the environmental temperature difference correction term, the heating device is controlled to heat the first space until the temperature in the first space equals the target experimental temperature.

[0056] Specifically, the above steps can be implemented in the following manner: Set the target experimental temperature and collect ambient temperature data in real time; If the target experimental temperature is 80℃, the first temperature sensor 17 detects the water temperature in the first space as 20.0℃, and the second temperature sensor detects the ambient temperature as 15.0℃.

[0057] The first controller 18, based on the ambient temperature compensation model, determines that heat loss is faster in low-temperature environments, requiring a faster heating rate. Generally, the ambient temperature compensation model is as follows:

[0058] After adding the ambient temperature difference correction term, the ambient temperature compensation model is as follows:

[0059] Where, ε comp k is the temperature compensation value. env T is the environmental compensation coefficient (generally ranging from 0.2 to 0.4). set T is the target experimental temperature. meas T represents the temperature of the water in the first space. env The ambient temperature.

[0060] (a) Automatic adjustment of heater power. The controller calculates the PID strength of the output signal, converts the output signal into a voltage / current signal, and controls the heater power to be automatically increased.

[0061] In this embodiment, the initial temperature difference between the target experimental temperature and the water temperature in the first space is 60°C, the environmental temperature difference correction term is 0.3×(80-15)=19.5°C, the temperature compensation value is 79.5°C, the first controller 18 drives the heater to enter the maximum output state of 90-100% of the rated power, and the heater 7 starts to operate at a higher power to accelerate the temperature rise rate.

[0062] (ii) Real-time monitoring of changes in internal and ambient temperatures.

[0063] When the internal temperature of the first space rises to 60℃ (i.e., greater than 75% of the target experimental temperature), the temperature compensation value is calculated based on changes in ambient temperature. The PID control output is then reduced to 40%-60% of the rated power.

[0064] (iii) When the temperature in the first space slowly rises to the target experimental temperature ±0.3℃, the first controller 18 dynamically adjusts the heater to maintain it between 20% and 30% of the rated power to achieve temperature balance.

[0065] Specifically: When the internal temperature of the first space is less than 90% of the temperature compensation value, the heater operates at 100% of its rated power. When the internal temperature of the first space is greater than or equal to 90% of the temperature compensation value but less than the temperature compensation value, the power of the heater will gradually decrease from 100% of the rated power to 90% of the rated power as the internal water temperature rises.

[0066] When the temperature in the first space is greater than or equal to the temperature compensation value, but less than 75% of the target experimental temperature, the power of the heater will gradually decrease from 90% of the rated power to 60% of the rated power as the internal water temperature rises.

[0067] When the temperature in the first space is greater than or equal to 75% of the target experimental temperature and less than or equal to the target experimental temperature, the power of the heater will gradually decrease uniformly from 60% of the rated power to 40% of the rated power as the internal water temperature rises.

[0068] The heater does not work when the temperature in the first space is greater than or equal to the target experimental temperature.

[0069] The first controller 18 checks the temperature in the first space every second; if the temperature remains stable, no further adjustment is needed; if the room temperature suddenly drops, the first controller 18 automatically increases the heating power in the manner described above to maintain the set temperature.

[0070] It should be noted that the temperature of the injected water is generally consistent with the temperature required for the experiment; when the temperature of the injected water is inconsistent with the temperature required for the experiment, causing a change in the temperature in the first space, the pressurizing device will heat and adjust the temperature in the first space in the manner described above.

[0071] S4-2: Control the pressurization device to provide pressure to the first space so that the concrete sample 2 can withstand the pressure required for the experiment; The specific process includes: Once the temperature in the first space reaches equilibrium, the pressurization pump 9 is activated to perform staged pressurization: First, increase the pressure in the first space to 1MPa to check for leaks, and hold the pressure for 5 minutes to confirm the seal. The pressure is then increased in stages (holding pressure at 0.5 MPa for 2 minutes each time), and the rate of pressure increase is gradually reduced in the later stages. Finally, the target pressure is precisely maintained by the PID control system (fluctuation ≤ ±0.3 MPa).

[0072] The entire process is monitored in real time via a digital display instrument and is equipped with a pressure protection mechanism. When the hydraulic pressure inside the first space exceeds the preset safety threshold, the safety valve 11 will be automatically triggered to open, achieving rapid unloading protection under overpressure conditions.

[0073] S5: The data processing device detects the internal temperature and stress values ​​of the concrete sample 2 under the required temperature and pressure conditions through the sensing component 3.

[0074] Based on the above steps, the material performance evaluation, numerical model verification, and actual engineering temperature control layout can be further improved by monitoring the internal temperature and stress values. This provides a scientific basis for the durability design of ultra-deep underground engineering structures in ultra-deep underground environments, the layout of temperature crack control systems, and the selection of construction techniques.

[0075] After the experiment, first turn off the power switch and open the safety valve 11 to release pressure. After the pressure is completely released, use a torque wrench to loosen the high-strength alloy bolts 16 one by one. With the help of hoisting equipment, separate the cover 6 from the curing tank body 4 by a certain distance (enough to disconnect the two aviation connectors). Disconnect the connection between the first aviation connector 12 and the second aviation connector 13, and then completely separate the cover 6 from the curing tank body 4. Finally, take out the concrete sample 2 for sealed curing and conduct performance tests on the concrete sample.

[0076] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A high-temperature and high-pressure concrete curing autoclave experimental device, characterized in that, include: A curing vessel (1) has a first space inside for placing a concrete sample (2); a sensing component (3) is pre-embedded inside the concrete sample (2). A heating device is installed on the outer wall of the curing vessel (1) to heat the first space so that the concrete sample (2) is at the temperature required for the experiment. A pressurizing device, which is connected to the first space, is used to provide pressure to the first space so that the concrete sample (2) can withstand the pressure required for the experiment; A data processing device is detachably electrically connected to the sensing component (3) for detecting the internal temperature and stress values ​​of the concrete sample (2) under the temperature and pressure required for the experiment through the sensing component (3).

2. The experimental apparatus for high-temperature and high-pressure concrete curing autoclave according to claim 1, characterized in that, The curing vessel (1) includes: The curing vessel body (4) has the first space inside and a first opening (5). The cover (6) is detachably installed at the first opening (5) to isolate the first space from the external space.

3. The experimental apparatus for high-temperature and high-pressure concrete curing autoclave according to claim 2, characterized in that, The heating device includes: Heater (7), which is fixedly installed on the outer side wall of the curing vessel body (4); Temperature controller (8) is installed on the curing vessel body (4) to detect the temperature inside the first space and the temperature outside the space, and to control the heater (7) to heat the first space according to the temperature inside the first space and the temperature outside the space.

4. The experimental apparatus for high-temperature and high-pressure concrete curing autoclave according to claim 2, characterized in that, The pressurizing device includes: A pressure pump body (9) is connected to the first space and is used to inject liquid into the first space to provide pressure for the concrete sample (2). A pressure controller (10) is installed on the cover (6) to detect the pressure in the first space and control the pressurizing pump (9) to adjust the pressure of the first space according to the pressure in the first space.

5. The experimental apparatus for high-temperature and high-pressure concrete curing autoclave according to claim 4, characterized in that, The pressurizing device also includes: Safety valve (11) is installed on the cover (6) and connects the first space with the external space, and is used to depressurize the first space.

6. The experimental apparatus for high-temperature and high-pressure concrete curing autoclave according to claim 1, characterized in that, The sensing component (3) includes: The third temperature sensor and the vibrating wire strain sensor; The third temperature sensor is used to detect the internal temperature value of the concrete sample (2) under the temperature and pressure required for the experiment; the vibrating wire strain sensor is used to detect the stress value of the concrete sample (2) under the temperature and pressure required for the experiment. The third temperature sensor and the vibrating wire strain sensor are electrically connected to a first aviation plug (12); the first aviation plug (12) is located on the outer surface of the concrete sample (2); the data processing device is electrically connected to a plurality of second aviation plugs (13) for connecting to a plurality of first aviation plugs (12). After the first aviation plug (12) and the second aviation plug (13) are plugged into each other, the sensing component (3) is electrically connected to the data processing device.

7. A control method for a high-temperature and high-pressure concrete curing autoclave experimental device, characterized in that, The experimental apparatus for high-temperature and high-pressure concrete curing autoclave as described in any one of claims 1-6 includes: Prepare a concrete sample (2); a sensing component (3) is pre-embedded inside the concrete sample (2); The concrete sample (2) is placed in the first space of the curing tank (1); The sensing component (3) and the data processing device are electrically connected; The heating device is controlled to heat the first space, so that the concrete sample (2) is at the temperature required for the experiment; The pressurization device is controlled to provide pressure to the first space so that the concrete sample (2) can withstand the pressure required for the experiment; The data processing device detects the internal temperature and stress values ​​of the concrete sample (2) under the required temperature and pressure conditions through the sensing component (3).

8. The control method for the high-temperature and high-pressure concrete curing autoclave experimental device according to claim 7, characterized in that, Preparation of concrete specimens (2) includes: Obtain the volume of the concrete sample (2) required for the experiment to obtain the first volume; The first liquid level of the fluid concrete in the mold after the first volume of ... Select a sensing component (3) with a corresponding wire length based on the first liquid level. The sensing component (3) is suspended inside the mold, so that the lower end of the sensing component (3) in the vertical direction is immersed in the fluid concrete, and the height of the end connected to the data processing device is greater than the first liquid level. After the mold is sealed, the mold and the concrete inside are used together as concrete samples (2).

9. The control method for the high-temperature and high-pressure concrete curing autoclave experimental device according to claim 7, characterized in that, Controlling the heating device to heat the first space, so that the concrete sample (2) is at the temperature required for the experiment, includes: Obtain the target experimental temperature required for the experiment; Obtain the ambient temperature of the external space, as well as the experimental temperature within the first space; Calculate the ambient temperature difference correction term based on the ambient temperature and the experimental temperature; Based on the environmental temperature difference correction term, the heating device is controlled to heat the first space until the temperature in the first space equals the target experimental temperature.

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