Heating and Pressurizing Experimental Device for Tube-Type Samples and Its Usage Method

Abstract

This application relates to high-temperature and high-pressure test technologies, and discloses a heating and pressurizing experimental device for tubular samples and its usage method. While meeting the sealing performance of the experimental device, it ensures the best observation position of the sample, can realize the in-situ high-temperature and high-pressure experimental function of the sample, so as to provide relatively real data of materials under corresponding service conditions. The device includes a heating furnace provided with a door body, a high-pressure sample component including a sample pressurization connection pipeline, and a pre-tightening force sealing device. A first pipeline is provided on the door body, and a second pipeline for connecting a vacuum pump and at least one observation window for monitoring the experimental state of the tubular sample are further provided on the heating furnace; a first port of the sample pressurization connection pipeline is used to connect the tubular sample, a second port of the sample pressurization connection pipeline is used to access high-pressure gas, and the outer diameter of the sample pressurization connection pipeline is slightly smaller than the inner diameter of the first pipeline; the pre-tightening force sealing device is used to detachably seal and install the high-pressure sample component in the first pipeline.

Description

Technical Field

[0001] This application relates to the technology of high-temperature and high-pressure test devices, and particularly to the technology of heating and pressurizing experimental devices for tubular samples. Background Art

[0002] Testing the high-temperature and high-pressure conditions of tubular structure samples is an important means for testing the material properties of structural materials under various extreme conditions such as reactors. It can reflect the changes in material properties such as creep and fatigue of tubular structure materials under extreme conditions to the greatest extent, laying a good experimental foundation for engineering applications.

[0003] However, there is currently no high-temperature and high-pressure experimental device suitable for tubular structure samples, which cannot meet the high-temperature and high-pressure test requirements of tubular structure samples. Therefore, it is necessary to develop a device to meet the high-temperature and high-pressure test requirements of tubular structure samples and lay a material parameter foundation for material applications under extreme conditions. Summary of the Invention

[0004] The purpose of this application is to provide a heating and pressurizing experimental device for tubular samples and its usage method. While ensuring the sealing performance of the experimental device, it can ensure the best observation position of the sample, realize the in-situ experimental function of the sample under high temperature and high pressure, and thus provide relatively real data of the material under corresponding service conditions.

[0005] This application discloses a heating and pressurizing experimental device for tubular samples, including:

[0006] A heating furnace provided with a door body, a first pipe is provided on the door body, and a second pipe for vacuum pumping and at least one observation window for monitoring the experimental state of the tubular sample are also provided on the heating furnace;

[0007] A high-pressure sample component including a sample pressurizing connection pipe, the first port of the sample pressurizing connection pipe is used to connect the tubular sample, the second port of the sample pressurizing connection pipe is used to access high-pressure gas, and the outer diameter of the sample pressurizing connection pipe is slightly smaller than the inner diameter of the first pipe;

[0008] A pre-tightening force sealing device for detachably sealing and installing the high-pressure sample component in the first pipe.

[0009] In a preferred example, the first pipe extends a preset length outward along the central axis direction of the furnace;

[0010] The pre-tightening force sealing device includes a pre-tightening unit and a sealing unit. The pre-tightening unit is arranged on the extended part of the first pipe outside the furnace, and the sealing unit is arranged between the extended part of the first pipe outside the furnace and the sample pressurizing connection pipe.

[0011] In a preferred example, the at least one observation window includes a first observation window disposed in the axial direction of the tubular sample and at least one second observation window disposed in the radial direction of the tubular sample.

[0012] In a preferred example, the heating furnace further includes a furnace body, and the furnace body is detachably and sealingly connected to the door body, or sealingly hinge-connected;

[0013] The high-pressure sample component further includes a barometer and a valve provided at its second port.

[0014] In a preferred example, the second pipe is also used for introducing an inert gas;

[0015] A third pipe is also provided on the heating furnace, and the third pipe serves as an exhaust passage.

[0016] In a preferred example, the height of the second pipe is higher than the height of the third pipe;

[0017] Both the second pipe and the third pipe are provided on the door body, and the height of the first pipe is between the height of the second pipe and the height of the third pipe.

[0018] In a preferred example, the second pipe and the third pipe respectively extend a preset length outward along the direction of their central axes;

[0019] Valves are respectively provided at the ports of the extended parts of the second pipe and the third pipe outside the furnace.

[0020] In a preferred example, the first port of the sample pressurization connection pipe and the tubular sample are welded and sealed;

[0021] The heating furnace is internally provided with a heating, heat preservation and temperature control system.

[0022] This application also discloses a usage method of the foregoing heating and pressurization experimental device for tubular samples, including:

[0023] Open the door body, and weld the tubular sample to the sample pressurization connection pipe passing through the first pipe;

[0024] Close the door body, and use a pre-tightening force sealing device to seal and fix the sample pressurization connection pipe in the first pipe.

[0025] In a preferred example, the at least one observation window includes a first observation window disposed in the axial direction of the tubular sample and at least one second observation window disposed in the radial direction of the tubular sample;

[0026] Before using the pre-tightening force sealing device to seal and fix the sample pressurization connection pipe in the first pipe, it further includes:

[0027] Through the second observation window, adjust the position of the tubular sample pressurized connection pipe in the heating furnace to ensure that the sample is within the observation range of the second observation window;

[0028] After the sample pressurized connection pipe is sealed and fixed in the first pipe by using the pre-tightening force sealing device, it further includes: respectively monitoring the axial parameters and radial parameters of the tubular sample in real time through the first window and the second window.

[0029] The embodiments of the present application have at least the following advantages and beneficial effects:

[0030] Open the sealing door, weld and connect the tubular sample with the sample pressurized connection pipe placed through the first pipe reserved in the sealing door, close the sealing door, after adjusting the sample in the furnace to the best observation position through the second observation window, seal and install the sample pressurized connection pipe in the first pipe through the pre-tightening force sealing device. While ensuring the sealing performance of the experimental device, the best observation position of the sample is guaranteed.

[0031] By setting one observation window axially and at least two observation windows radially, more comprehensive experimental data collection is realized, and the accuracy of the experiment is improved.

[0032] Using the second pipe and the third pipe as the gas circulation channels to evacuate the inside of the furnace body or introduce argon for protection, and at the same time filling high-pressure gas into the tubular sample, the function of high-pressure testing under various extreme conditions such as similar ultra-supercritical reactors is realized, meeting various experimental needs.

[0033] After ensuring that the furnace body is filled with vacuum or argon, start heating up. The heating rate can be controlled in real time through the temperature control system, and the temperature in the furnace can be monitored.

[0034] In addition, the embodiments of the present application well realize the vacuum heating and high-temperature and high-pressure experimental conditions of the tubular sample, avoid adverse effects such as sample oxidation during heating, and at the same time provide more comprehensive monitoring conditions for parameter monitoring of the tubular sample under high-temperature and high-pressure, improving the accuracy of the experiment.

[0035] A large number of technical features are recorded in the specification of this application, which are distributed in various technical solutions. If all possible combinations of technical features of this application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, and the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of a heating and pressurizing experimental device for tubular samples according to the first embodiment of the present application.

[0037] Figure 2 Schematic diagram of an exemplary furnace body structure according to the first embodiment of the present application.

[0038] Figure 3 It is a schematic diagram of an example door body structure according to the first embodiment of the present application.

[0039] Figure 4 Schematic diagram of the structure of an exemplary high-voltage sample component according to the first embodiment of the present application.

[0040] Figure 5 It is a schematic diagram of the structure of an exemplary preload sealing device according to the first embodiment of the present application.

[0041] Figure 6 It is a schematic flow chart of a method for using a heating and pressurizing experimental device for tubular samples according to the second embodiment of the present application.

[0042] Figure 7 According to this application Figure 1 Schematic diagram showing the state of the example experimental apparatus after experimental preparation is completed.

[0043] in,

[0044] 101-heating furnace 1011-furnace body 1012-door

[0045] 102-high pressure sample component 103-preload sealing device 201-first observation window

[0046] 202 - Second observation window 301 - First pipeline 302 - Second pipeline

[0047] 303 - Third pipeline 401 - Tube - type sample 402 - Pre - tightening force sealing washer

[0048] 403 - Barometer 404 - Valve 405 - Sample pressurization connection pipeline Detailed implementation manners

[0049] In the following description, many technical details are presented for the better understanding of the readers of this application. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can still be implemented.

[0050] To make the purpose, technical solutions, and advantages of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0051] The first embodiment of this application relates to a heating and pressurization experimental device for tube - type samples, as Figure 1 , 2 , shown in Figure 3. This device includes a heating furnace 101, a high - pressure sample component 102, and a pre - tightening force sealing device 103.

[0052] Specifically, the heating furnace 101 includes a furnace body 1011 and a door body 1012. A first pipeline 301 is provided on the door body 1012. The heating furnace 101 is also provided with a second pipeline 302 for connecting a vacuum pump and at least one observation window for monitoring the state of the tube - type sample. Among them, the vacuum pump and the second pipeline 302 can be connected by, for example, a clamp or a thread.

[0053] Optionally, the door body 1012 and the furnace body 1011 are detachably and sealingly connected through a detachable structure and a sealing structure. For example, the sealing structure can be a sealing washer provided on the door body 1012 and / or the furnace body 1011. For example, the lower surface of the door body 1012 is provided with pulleys, and a guide rail is provided below the side of the furnace body 1011 where the door body 1012 is installed. The pulleys and the guide rail cooperate to form the detachable structure. Optionally, the door body 1012 and the furnace body 1011 can also be connected by a sealed hinge, etc.

[0054] Among them, the second pipeline 302 can be arranged on the furnace body 1011 or on the door body 1012. Optionally, a third pipeline 303 can also be arranged on the heating furnace 101. Further, the second pipeline 302 and the third pipeline 303 provide a circulation channel for the inert gas circulation. For example, the second pipeline 302 is used to introduce inert gas, and the third pipeline 303 is used as a gas outflow channel.

[0055] Optionally, the height of the second pipeline 302 is higher than that of the third pipeline 303. Optionally, both the second pipeline 302 and the third pipeline 303 are arranged on the door body 1012, and the height of the first pipeline 301 is between the height of the second pipeline 302 and the height of the third pipeline 303.

[0056] Optionally, the second pipeline 302 and the third pipeline 303 respectively extend a preset length outward from the furnace along their respective central axis directions. The specific length can be set according to needs. Valves are provided at the parts of the second pipeline 302 and the third pipeline 303 extending outward from the furnace, and they are connected to the vacuum pump and the barometer by clamps or threads.

[0057] Optionally, for example, the first pipeline 301 is sealed with the door body 1012 by welding through the door body 1012; the second pipeline 302 and the third pipeline 303 are sealed with the furnace body 1011 or the door body 1012 by welding through them to ensure sealing.

[0058] The at least one observation window is used to observe the parameter changes of the sample under high-temperature and high-pressure experimental conditions. The two provide a reliable interface for realizing real-time data monitoring and ensure that the experiment can be carried out in situ. Each observation window is preferably made of high-temperature resistant material. A sample parameter detection device is externally connected to each observation window, such as but not limited to a laser detector, etc.

[0059] Optionally, as Figure 1 、 2 shown, the at least one observation window includes a first observation window 201 arranged axially of the tubular sample and a second observation window 202 arranged radially of the tubular sample. The first observation window 201 is used to monitor the axial state of the tubular sample, and the second observation window 202 is used to monitor the radial state of the tubular sample. Further, the second observation window 202 is also used to adjust the position of the tubular sample in the furnace to ensure that the tubular sample is in the best observation position of the second observation window 202 when installing the high-pressure sample component.

[0060] Optionally, the at least one observation window may further include a first observation window disposed along the axis of the tubular sample and a plurality of second observation windows disposed radially of the tubular sample. The first observation window is used to monitor the axial experimental state of the tubular sample, and the plurality of second observation windows are used to monitor the radial experimental states of different positions of the tubular sample respectively. For example, the furnace body is arranged in a cylindrical shape, and the plurality of second observation windows may be, for example, evenly or unevenly distributed around the furnace body in a circle. For another example, the furnace body is arranged in a cuboid or cube shape, and the plurality of second observation windows may be, for example, distributed on four side surfaces of the cuboid or cube.

[0061] The high-pressure sample component 102 includes a sample pressurization connection pipe. The first port of the sample pressurization connection pipe is used to connect the tubular sample, and the second port of the sample pressurization connection pipe is used to access high-pressure gas. The outer diameter of the sample pressurization connection pipe is slightly smaller than the inner diameter of the first pipe to facilitate passing the sample pressurization connection pipe through the first pipe and then achieving subsequent pre-tightening force sealing installation.

[0062] Optionally, the first port of the sample pressurization connection pipe is connected to the tubular sample, for example but not limited to, by welding.

[0063] Optionally, the high-pressure sample component 102 further includes a barometer and a valve provided at the second port of the sample pressurization connection pipe.

[0064] Figure 4 An example high-pressure sample component is shown. As Figure 4 shown, the high-pressure sample component 102 includes a tubular sample 401, a pre-tightening force sealing gasket 402, a barometer 403, a valve 404, and a sample pressurization connection pipe 405. Among them, the pre-tightening force sealing gasket 402 is fixed on the outside of the sample pressurization connection pipe 405 and is used to achieve the sealing between the sample pressurization connection pipe 405 and the first pipe 301 during subsequent pre-tightening force sealing installation. The tubular sample 401 is welded and sealed with the sample pressurization connection pipe 405, further ensuring the sealing of the high-pressure sample component. During use, the high-pressure sample component accesses high-pressure gas through the second port and fills it into the tubular sample, and controls the gas pressure through the barometer 403 and the valve 404, and can simulate the pressure-bearing conditions in the pipes of a reactor or other high-temperature and high-pressure working environments, such as axial and longitudinal pressure-bearing conditions.

[0065] The pre-tightening force sealing device 103 is used to detachably seal and install the sample pressurization connection pipe in the first pipe 301. This not only facilitates the loading and unloading of the sample and does not damage the sealing performance of the door, but also can adjust the position of the tubular sample in the furnace as needed.

[0066] Optionally, the pre-tightening force sealing device 103 includes a pre-tightening unit and a sealing unit, and the sealing unit is made of an elastic material. As Figure 5Shown is an example pre-tightening force sealing device. The pre-tightening unit can be, for example, an outer jacket clamp 304 provided on the part of the first pipe 301 extending outside the furnace, and the sealing unit can be, for example, a sealing gasket 302 provided on the outer surface of the sample pressurizing connection pipe, so as to detachably and sealingly install the sample pressurizing connection pipe in the first pipe 301.

[0067] Optionally, the heating furnace 101 is also internally provided with a heating and heat preservation and temperature control system for ensuring that the temperature inside the furnace is stably adjustable.

[0068] The second embodiment of the present application relates to a usage method of a heating and pressurizing experiment device for tubular samples. The heating and pressurizing experiment device is the heating and pressurizing experiment device involved in the first embodiment. The flowchart of the usage method is as Figure 6 shown and specifically includes the following steps:

[0069] Start. In step 601, before the experiment starts, open the door body and weld the tubular sample to the sample pressurizing connection pipe passing through the first pipe.

[0070] After that, enter step 602, close the door body, and use the pre-tightening force sealing device to sealingly fix the sample pressurizing connection pipe in the first pipe.

[0071] It should be noted that steps 601 to 602 are the experimental preparation stage. The specific experimental operations can be carried out according to specific process parameter requirements, which belong to the prior art and will not be elaborated in this application.

[0072] Optionally, the at least one observation window includes a first observation window provided in the axial direction of the tubular sample and at least one second observation window provided in the radial direction of the tubular sample. In this optional embodiment, before the step of "using the pre-tightening force sealing device to sealingly fix the sample pressurizing connection pipe in the first pipe", the following steps can also be included: adjusting the position of the tubular sample pressurizing connection pipe in the heating furnace through the second observation window to ensure that the sample is within the observation range of the second observation window; and after the step of "using the pre-tightening force sealing device to sealingly fix the sample pressurizing connection pipe in the first pipe", the following steps can also be included: respectively monitoring the axial parameters and radial parameters of the tubular sample in real time through the first window and the second window.

[0073] For example, for Figure 1The usage method of the shown experimental device specifically includes: First, open the door body and weld the tubular sample to the sample pressurization connection pipe placed through the first pipe of the door body; Then, close and fasten the door body to ensure the overall seal of the door and the furnace body; At the same time, through the second observation window, adjust the position of the tubular sample pressurization connection pipe in the heating furnace to ensure that the sample is within the observation range of the second observation window; Then, use the pre-tightening force sealing device to seal and install the sample pressurization connection pipe in the first pipe, and at the same time play the role of fixing the positions of the sample and the sample pressurization connection pipe, as Figure 7 Figure Figure 7 is a schematic diagram of the state after the experimental preparation of this experimental device; Then, open the valves of the vacuum pump or argon protection device externally connected to the second and third pipes and the sample pressurization connection pipe, evacuate the heating furnace or conduct argon protection, monitor the vacuum degree in the heating furnace through a barometer to ensure that the appropriate vacuum degree is reached, or introduce argon to achieve the circulating flow of argon, so as to ensure that the sample will not be oxidized during heating and ensure the normal progress of the experiment (for example, the vacuum degree can reach 10 Pa, etc., ensure that the sample will not be oxidized during heating, start heating and raising the temperature after ensuring that the vacuum or argon fills the furnace body, and can be raised to 1200 °C and kept warm, etc.); At the same time, fill high-pressure gas into the tubular sample in the high-pressure sample component (for example, fill high-pressure gas, up to 49 Mpa at most, etc.) to achieve the function of high-pressure testing under various extreme conditions such as supercritical reactors, start heating and raising the temperature after ensuring that the vacuum degree meets the requirements or argon fills the furnace body, and control the temperature to rise to the preset experimental temperature and keep warm through the temperature control system of the furnace body; Finally, use external devices such as optical monitoring instruments to monitor the corresponding parameters of the tubular sample through the first and second observation windows, so as to be able to reflect the corresponding behavior of the sample under high temperature and high pressure in real time and achieve the function of in-situ and real-time measurement.

[0074] It should be noted that in the application documents of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one" does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element. In the application documents of this patent, if it is mentioned that an act is performed according to a certain element, it means that the act is performed at least according to that element, including two cases: the act is performed only according to that element, and the act is performed according to that element and other elements. Expressions such as multiple, many times, various, etc. include 2, 2 times, 2 kinds, as well as more than 2, more than 2 times, more than 2 kinds.

[0075] All documents mentioned in this application are considered to be integrally included in the disclosure of this application so that they can be used as a basis for modification if necessary. In addition, it should be understood that after reading the above disclosure of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection required by this application.

Claims

1. A heating and pressurizing experimental device for tubular samples, characterized in that, Comprising: A heating furnace provided with a door body, a first pipeline is provided on the door body, a second pipeline for vacuum pumping and at least one observation window for monitoring the experimental state of the tubular sample are also provided on the heating furnace, and the at least one observation window includes a first observation window arranged in the axial direction of the tubular sample and at least one second observation window arranged in the radial direction of the tubular sample; A high-pressure sample component including a sample pressurization connection pipeline, a first port of the sample pressurization connection pipeline is used for hermetically connecting the tubular sample by welding, a second port of the sample pressurization connection pipeline is used for accessing high-pressure gas, and the outer diameter of the sample pressurization connection pipeline is slightly smaller than the inner diameter of the first pipeline; A pre-tightening force sealing device for detachably and hermetically installing the high-pressure sample component in the first pipeline.

2. The heating and pressurizing experimental device for tubular samples according to claim 1, characterized in that, The first pipeline extends a preset length outward from the furnace along its central axis direction; The pre-tightening force sealing device includes a pre-tightening unit and a sealing unit, the pre-tightening unit is arranged on the extended part outside the furnace of the first pipeline, and the sealing unit is arranged between the extended part outside the furnace of the first pipeline and the sample pressurization connection pipeline.

3. The heating and pressurizing experimental device for tubular samples according to claim 1, characterized in that, The heating furnace further includes a furnace body, and the furnace body is detachably and hermetically connected or hermetically hinge-connected to the door body; The high-pressure sample component further includes a barometer and a valve arranged at its second port.

4. The heating and pressurizing experimental device for tubular samples according to claim 1, wherein The second pipeline is also used for introducing inert gas; A third pipeline is further provided on the heating furnace, and the third pipeline is used as an exhaust passage.

5. The heating and pressurizing experimental device for tubular samples according to claim 4, characterized in that, The height of the second pipeline is higher than the height of the third pipeline; The second pipeline and the third pipeline are both arranged on the door body, and the height of the first pipeline is between the height of the second pipeline and the height of the third pipeline.

6. The heating and pressurizing experimental device for tubular samples according to claim 5, characterized in that, The second pipeline and the third pipeline respectively extend a preset length outward from the furnace along their respective central axis directions; Valves are respectively arranged at the ports of the extended parts outside the furnace of the second pipeline and the third pipeline.

7. The heating and pressurization experimental device for a tubular sample according to claim 1, wherein The heating furnace is internally provided with a heating, heat preservation and temperature control system.

8. A method for using the heating and pressurizing experimental device for tubular samples as described in claim 1, characterized in that, Comprising: Open the door body, and weld the tubular sample to the sample pressurization connection pipeline passing through the first pipeline; Close the door body, and use the pre-tightening force sealing device to hermetically fix the sample pressurization connection pipeline in the first pipeline.

9. The method of use according to claim 8, wherein The at least one observation window includes a first observation window arranged in the axial direction of the tubular sample and at least one second observation window arranged in the radial direction of the tubular sample; Before using the pre-tightening force sealing device to hermetically fix the sample pressurization connection pipeline in the first pipeline, the following steps are further included: through the second observation window, adjust the position of the tubular sample pressurization connection pipeline in the heating furnace to ensure that the sample is within the observation range of the second observation window; After using the pre-tightening force sealing device to hermetically fix the sample pressurization connection pipeline in the first pipeline, the following steps are further included: respectively monitor the axial parameters and radial parameters of the tubular sample in real time through the first window and the second window.

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