High-temperature pipe testing system and method

Abstract

The invention discloses a high-temperature pipe test system and method, and the system comprises two test clamps (1), a pressure control system (2), a pressurization device (3), a gas generation and storage device (4), a gas extraction device (5) and a pipeline control device (6), and a pipe sample (7) is fastened between the two test clamps (1). The two test clamps (1), the pressure control system (2), the pressurizing device (3), the gas generation and storage device (4), the gas extraction device (5), the pipeline control device (6) and the pipe sample (7) are communicated through pipeline fluid to form a serial pipeline, the invention further provides a high-temperature pipe test method which comprises the following steps: fastening the pipe sample (7), starting the gas extraction device (5), and vacuumizing the inside of the pipe sample (7); the gas generation and storage device (4) is started to introduce test gas, and the pressure control system (2) and the pressurizing device (3) are started to start a test.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe fatigue and creep performance testing, in particular to a high-temperature pipe testing system and method. BACKGROUND

[0002] The new generation of nuclear power plants generally have high temperatures in pursuit of economy and efficiency, which exceeds the upper limit of the temperature at which the material creeps and is damaged, and the probability of failure due to creep damage increases significantly. Pipes are an important component that connects various parts and are an important part of the pressure boundary. Therefore, it is crucial to real-time grasp the creep damage state of the pressure pipe. The rate of creep damage is very slow, and generally goes through three damage stages: transition creep stage, steady-state creep stage, and accelerated creep stage. Creep test measurement systems are widely used in aerospace, national defense and military industry, aerospace, modern space technology, nuclear fusion reactor engineering, and new material research fields to complete the testing and research of the mechanical properties of materials under extremely high temperature and specific environments.

[0003] With the development of science and technology, many different fatigue and creep testing machines have entered the field of scientific research for measuring the various fatigue and creep properties of different materials and structures under room temperature conditions, such as tensile, compression, or tensile and compression alternating loads. Generally, the testing machine has a circular clamp, a rectangular clamp, and a combined clamp. The shortcomings of the existing test clamps are that the clamps need to be frequently replaced according to the sample, and if the clamping force of the clamp is not enough, the sample is prone to sliding, leading to experimental failure or even accidents; if the clamping force is too large, the pipe sample will be damaged, making the test impossible. The existing test machine clamps cannot meet the clamping operation of multiple samples, and the clamps need to be frequently replaced and customized, increasing the cost, greatly delaying the experimental time, reducing the experimental efficiency, and being unable to perform high-throughput testing.

[0004] In patent document CN214794228U, an electronic high-temperature pipe tensile testing machine is disclosed, which includes a testing machine body, a first connecting block is slidably connected to the inner wall of the upper end of the testing machine body, a sensor is provided on one side of the first connecting block, a furnace latch is movably connected to the outer wall of the lower end of the first connecting column, an opposed high-temperature furnace is fixedly connected to one end of the furnace latch, a high-temperature opening is provided on one side of the opposed high-temperature furnace, a extensometer measuring rod is slidably connected in the high-temperature opening, an MF extensometer is slidably connected to one side of the extensometer measuring rod, two tensile clamp bodies are symmetrically arranged on the upper and lower ends of the opposed high-temperature furnace, a clamp push rod is provided on the lower end of the tensile clamp body, clamp blocks are movably connected to the two sides of the clamp push rod, a baffle is fixedly connected to one side of each of the two clamp blocks. The problem of frequent replacement of the existing fatigue and creep testing machine clamps, improper control of the clamping force leading to sample sliding or damage, low experimental efficiency, and increased cost has not been solved.

[0005] In the patent document CN222299340U, a clamp for high-temperature pipe tensile test is disclosed, wherein a plug core mounting threaded hole is arranged at the bottom center of the cylinder top of the cylindrical shell, the cylinder wall of the cylindrical shell is arranged in the direction of the cylinder top towards the bottom, and a thread for installing a cylindrical inner cavity is arranged in the cylinder wall of the cylindrical shell; a coaxial circular truncated cone accommodating part is arranged at the center of the cylindrical shell, the large mouth of the circular truncated cone accommodating part faces the direction of the cylinder top, and a three-piece wedge sleeve clamping part is arranged in the circular truncated cone accommodating part; the conical contact part of the conical plug abuts against the end face of the pipe to be tested from the inside, and the three-piece wedge sleeve clamping part is tightly arranged on the outer periphery of the pipe to be tested, and the outside of the three-piece wedge sleeve clamping part is tightly pressed against the wall surface of the circular truncated cone accommodating part. The problems of frequent replacement of the existing fatigue creep test machine clamp, improper clamping force control leading to sample sliding or damage, low experimental efficiency and cost increase have not been solved.

[0006] In summary, the above two existing patents do not solve the problems of frequent replacement of the existing fatigue creep test machine clamp, improper clamping force control leading to sample sliding or damage, low experimental efficiency and cost increase. SUMMARY

[0007] Based on the above technical problems, the present application provides a high-temperature pipe test system and method, which solves the problems of frequent replacement of the existing fatigue creep test machine clamp, improper clamping force control leading to sample sliding or damage, low experimental efficiency and cost increase.

[0008] To achieve the above-mentioned purpose, the present application provides a high-temperature pipe test system.

[0009] A high-temperature pipe test system, comprising two test clamps, a pressure control system, a pressurizing device, a gas generating and storage device, a gas extraction device and a pipeline control device, the two test clamps are fixed to the pipe sample, the test clamps, the pressure control system, the pressurizing device, the gas generating and storage device, the gas extraction device, the pipeline control device and the pipe sample are connected in series by the fluid communication of the pipelines.

[0010] Further, the two test clamps are respectively connected to the pressure control system and the gas extraction device through the pipelines.

[0011] Further, the test clamp comprises a gas conveying pipeline, one end of the gas conveying pipeline penetrating the test clamp towards the inside of the pipe sample and extending along the side surface of the test clamp, and the gas conveying pipeline is connected to the pressure control system or the gas extraction device, so that the gas can flow in the inside of the pipe sample.

[0012] Further, the test clamp comprises a chuck, a chuck body and a connector, and the chuck and the connector are respectively arranged at the two ends of the chuck body.

[0013] Further, the chuck and the body are cylindrical structures, the diameter of the chuck is larger than that of the body, and the chuck is used to be embedded in an external fixing device; the joint is a circular truncated cone structure, and the gas pipeline penetrates the upper bottom of the joint and the side surface of the body.

[0014] Further, the body includes a threaded hole penetrating the surface of the body, which is used to fasten the body to an external fixing device.

[0015] Further, the pressure control system is connected to the pressurizing device through a pipeline, and the pipeline control device is connected to the gas extraction device through a pipeline.

[0016] Further, the gas generation and storage device is connected to the pipeline between the pressurizing device and the pipeline control device.

[0017] Further, the pressure control system is used to monitor the pressure in the pipeline sample.

[0018] Further, the pressurizing device is used to compress the normal pressure gas in the pipeline, and the pressurizing device includes a compressor.

[0019] Further, the gas generation and storage device is used to release and store the test gas, and the test gas includes water vapor, carbon dioxide gas and / or hydrogen sulfide gas.

[0020] Further, the gas extraction device is used to extract the environment in the pipeline sample to vacuum, and is used when the pipeline sample is under negative pressure; and the gas extraction device includes a molecular pump.

[0021] Further, the pipeline control device is used to switch the on-off state of the gas in the pipeline; and the pipeline control device includes a control cabinet.

[0022] To achieve the above-mentioned purpose, the application further provides a high-temperature pipe material test method.

[0023] A high-temperature pipe material test method, characterized in that, comprising:

[0024] S1: fasten the pipeline sample between the two test clamps, open the gas extraction device, extract the pipeline sample to vacuum, and close the gas extraction device;

[0025] S2: open the gas generation and storage device, introduce the test gas into the pipeline sample, open the pressure control system and the pressurizing device to control the pressure of the test gas, and start the test.

[0026] Further, the step S1 further comprises:

[0027] Welding is performed on the joint between the pipe sample and the test fixture after the pipe sample is fastened.

[0028] Further comprising:

[0029] S3: If the test gas is harmful gas after the test is finished, the gas suction device is opened, the test gas is sucked into the gas generating and storage device, the gas suction device is closed, and the gas circulation in the pipeline is cut off by the pipeline control device.

[0030] Based on the above technical solution, the present application has at least the following beneficial effects:

[0031] 1. The present application proposes a high-temperature pipe test system and method, which can adapt to various pipe samples by designing the chuck as a cone, and only needs to fasten the pipe sample, without frequent replacement of the chuck, greatly saving time, reducing cost and improving experimental efficiency; by setting a pressure control system, a pressurizing device, a gas generating and storage device, a gas suction device and a pipeline control device outside and communicating with the pipe sample, the test process can be more accurately controlled, the pipe sample can maintain a constant pressure during the test process, and is not affected by the environmental pressure, thereby ensuring the accuracy of the test results and providing a reliable guarantee for the performance of the material under specific pressure conditions.

[0032] 2. The present application proposes a high-temperature pipe test system and method, which can always maintain the clamping state during the test process by controlling the two fixtures and the pipe sample to be on the same axis and further fastening by welding, and the joint will not be broken, which is simple in structure, convenient to use, effectively avoids problems such as sample sliding or fixture breaking, and ensures the smooth progress of the test.

[0033] 3. The present application proposes a high-temperature pipe test system and method, which can pass special gas into the pipe sample to test the pipe sample in a closed and harsh environment by setting a gas generating and storage device, a gas suction device and a pipeline control device, and can recycle all harmful gas after the test by the storage device and the gas suction device, and cut off the gas circulation of the test pipeline by the pipeline control device, thereby further ensuring the safety and environmental protection of the test process, effectively preventing the harmful gas leakage from causing harm to the environment and personnel, and improving the reliability and operability of the test system, providing a safer, more efficient and accurate solution for the performance test of high-temperature pipes in complex environments. BRIEF DESCRIPTION OF DRAWINGS

[0034] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0035] Figure 1 FIG. 1 shows a structural schematic diagram of a high-temperature pipe test system according to an embodiment;

[0036] Figure 2 FIG. 2 shows a three-dimensional structural diagram of a test fixture according to an embodiment;

[0037] Figure 3 FIG. 3 shows a sectional view of a part of a test fixture according to an embodiment;

[0038] Figure 4 FIG. 4 shows a sectional view of a part of a test fixture according to an embodiment;

[0039] Figure 5 FIG. 5 shows a schematic diagram of a test fixture connecting a pipe sample according to an embodiment.

[0040] Wherein the above-mentioned drawings include the following reference signs:

[0041] 1, test fixture; 2, pressure control system; 3, pressurizing device; 4, gas generation and storage device; 5, gas extraction device; 6, pipe control device; 7, pipe sample;

[0042] 11, chuck; 12, chuck body; 13, joint; 14, gas conveying pipe;

[0043] 121, threaded hole. DETAILED DESCRIPTION

[0044] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0045] The present application will be described in further detail below in combination with specific embodiments, which cannot be understood as limiting the scope of the present application. The term “comprising” indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; in addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the description, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] Embodiments

[0048] The present application provides a high-temperature pipe test system, as shown in Figure 1 including two test clamps 1, a pressure control system 2, a pressurizing device 3, a gas generating and storage device 4, a gas extraction device 5 and a pipeline control device 6, the pipe sample 7 is clamped between the two test clamps 1, the test clamps 1, the pressure control system 2, the pressurizing device 3, the gas generating and storage device 4, the gas extraction device 5, the pipeline control device 6 and the pipe sample 7 are connected in series by the fluid communication of the pipeline.

[0049] In the present application, "fluid communication" means that different containers or devices are connected by pipelines, pipelines and the like, and the transmission and distribution of gas or liquid and the like can be realized; in this communication system, gas or liquid and the like can flow from one container to another container or from one device to another device under the action of pressure difference.

[0050] Further, as shown in Figure 1 The two test clamps 1 at both ends of the pipe sample 7 are connected to the pressure control system 2 and the gas extraction device 5 respectively by the pipeline, the pressure control system 2 is connected to the pressurizing device 3 by the pipeline; the pipeline control device 6 is connected to the gas extraction device 5 by the pipeline, the gas generating and storage device 4 is connected by the pipeline and is arranged between the pressurizing device 3 and the pipeline control device 6.

[0051] Further, as shown in Figure 2 The test clamp 1 includes a chuck 11, a clamp body 12 and a connector 13, wherein the chuck 11 and the connector 13 are arranged at both ends of the clamp body 12, the chuck 11 and the connector 13 of the test clamp 1 can be integrally machined and cast into shape, or can be cast separately and then welded into a clamp.

[0052] Further, in combination with Figure 2 and Figure 3As shown in the figure, the test fixture 1 further comprises a gas pipeline 14, which is arranged inside the test fixture 1, penetrates one end of the test fixture 1 towards the inside of the pipe sample 7, and extends along the side of the test fixture 1, and is used to connect the pressure control system 2 or the gas extraction device 5 and introduce the test gas into the inside of the pipe sample 7.

[0053] Specifically, in the embodiment, the chuck 11 and the chuck body 12 are cylindrical structures, the diameter of the chuck 11 is larger than that of the chuck body 12, and the chuck 11 is used to be fitted in the external fixing device; the connector 13 is a circular truncated cone structure, the gas pipeline 14 penetrates the upper bottom of the connector 13 and the side of the chuck body 12, and the side of the connector 13 can be provided with a smooth surface or a thread, which is used to connect the pipe sample 7. Figure 2

[0054] Further, as shown in the figure, the test fixture 1 further comprises a threaded hole 121, which penetrates the outer side surface of the chuck body 12 along the radial direction of the chuck body 12, and an external rod is arranged to penetrate the threaded hole 121 and be fastened to the external fixing device. Figure 4

[0055] Further, the pressure control system 2 is used to monitor the pressure in the pipe sample 7; the pressurizing device 3 is used to compress the normal pressure gas in the pipeline; the gas generation and storage device 4 is used to release and store the test gas, which includes water vapor, carbon dioxide gas and / or hydrogen sulfide gas, in the embodiment, water vapor is used to be introduced into the pipe sample 7 for testing; the gas extraction device 5 is used to extract the environment in the pipe sample 7 to vacuum, which is used when the pipe sample 7 is under negative pressure; and the pipeline control device 6 is used to switch the on-off state of the gas in the pipeline.

[0056] Specifically, in the embodiment, the pressurizing device 3 is a compressor, the gas extraction device 5 is a molecular pump, and the pipeline control device 6 is a control cabinet.

[0057] To achieve the above-mentioned purpose, the application further provides a visual electromagnetic composite defect detection method, which uses the high-temperature pipe material testing system and method as described above, and comprises the following steps:

[0058] S1: fasten the pipe sample 7 between the two test fixtures 1, start the gas extraction device 5, extract the inside of the pipe sample 7 to vacuum, and then stop the gas extraction device 5;

[0059] S2: start the gas generation and storage device 4, introduce the test gas into the pipe sample 7, start the pressure control system 2 and the pressurizing device 3 to control the pressure of the test gas, and start the test.

[0060] Further, in the step S1, the following steps are further included:

[0061] ​​Preferably, as Figure 5 The pipe sample 7 and the test fixture 1 are welded after being fastened, and in other embodiments, the pipe sample 7 can be fixed by threads on the surface of the joint 13.

[0062] Further comprising:

[0063] S3: After the test is completed, if the test gas is harmful gas, the gas suction device 5 is opened, the test gas is sucked into the gas generation and storage device 4, the gas suction device 5 is closed, and the gas flow state in the pipeline is cut off by the pipeline control device 6.

[0064] In summary, from the above description, the above-mentioned embodiments of the present application achieve the following technical effects:

[0065] 1. The present application provides a high-temperature pipe test system and method, by designing the clamp head as a cone shape, it can adapt to various test requirements of the pipe sample, only need to fasten the pipe sample, no need to frequently change the clamp head, greatly saves time, reduces cost, and improves experimental efficiency; by setting a pressure control system, a pressurizing device, a gas generation and storage device, a gas suction device and a pipeline control device outside and communicating with the pipe sample, the test process can be more accurately controlled, so that the pipe sample maintains a constant pressure during the test process, and is not affected by the environment pressure, thereby ensuring the accuracy of the test results, and providing a reliable guarantee for studying the performance of the material under specific pressure conditions.

[0066] 2. The present application provides a high-temperature pipe test system and method, by controlling the two clamps and the pipe sample to be on the same axis, and further fastening by welding, the clamping state can be maintained during the test process, and the joint will not be broken, the structure is simple and convenient to use, effectively avoids problems such as sample sliding or clamp breaking, and ensures the smooth progress of the test.

[0067] 3. The present application provides a high-temperature pipe test system and method, by setting a gas generation and storage device, a gas suction device and a pipeline control device, special gas can be introduced into the pipe sample to test the pipe sample in a closed and harsh environment, harmful gas after the test can be recycled by the storage device and the gas suction device, and the gas flow of the test pipeline is cut off by the pipeline control device, further ensuring the safety and environmental protection of the test process, effectively preventing harmful gas leakage from causing harm to the environment and personnel, and also improving the reliability and operability of the test system, providing a safer, more efficient and accurate solution for performance testing of high-temperature pipes in complex environments.

[0068] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0069] It should be noted that the relative terms such as first and second, etc. are used herein only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0070] It should be noted that in the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, those skilled in the art can combine and combine the different embodiments or features of the embodiments or examples described in the specification without contradiction, and the combination.

Claims

1. A high temperature pipe testing system, characterized in that: The invention comprises two test fixtures (1), a pressure control system (2), a pressurizing device (3), a gas generating and storing device (4), an exhaust device (5) and a pipeline control device (6); a tube sample (7) is fixed between the two test fixtures (1); the two test fixtures (1), the pressure control system (2), the pressurizing device (3), the gas generating and storing device (4), the exhaust device (5), the pipeline control device (6) and the tube sample (7) are connected through pipeline fluid to form a series pipeline.

2. The system according to claim 1, characterized in that The two test fixtures (1) are respectively connected to the pressure control system (2) and the air extraction device (5) through pipelines.

3. The system according to claim 2, characterized in that The test fixture (1) includes a gas pipeline (14), The gas delivery pipe (14) passes through one end of the test fixture (1) facing the inside of the tube sample (7) and the side of the test fixture (1) and extends along the side of the test fixture (1), and is connected to the pressure control system (2) or the air extraction device (5), so that the gas can flow inside the tube sample (7).

4. The system according to claim 3, characterized in that: The test fixture (1) comprises a clamp (11), a clamp body (12) and a joint (13). The clamping head (11) and the joint (13) are respectively arranged at two ends of the clamping body (12).

5. The system according to claim 4, characterized in that: The chuck (11) and the chuck body (12) are cylindrical structures, the diameter of the chuck (11) is larger than that of the chuck body (12), and the chuck (11) is used to be embedded in an external fixing device; The joint (13) is a truncated cone structure, and the gas delivery pipeline (14) passes through the upper bottom of the joint (13) and the side surface of the clamp body (12).

6. The system according to claim 4, characterized in that The clamp body (12) includes a threaded hole (121), The threaded hole (121) passes through the surface of the clamp body (12) and is used to fasten the clamp body (12) to an external fixing device.

7. The system according to claim 2, characterized in that: The pressure control system (2) is connected to the pressurizing device (3) via a pipeline; and the pipeline control device (6) is connected to the air extraction device (5) via a pipeline.

8. The system according to claim 7, characterized in that: The gas generation and storage device (4) is connected to a pipeline and is arranged between the pressurizing device (3) and the pipeline control device (6).

9. The system according to claim 1, characterized in that: The pressure control system (2) is used to monitor the pressure in the tube sample (7).

10. The system according to claim 1, characterized in that: The pressurizing device (3) is used to compress the normal-pressure gas in the pipeline, and the pressurizing device (3) comprises a compressor.

11. The system according to claim 1, characterized in that: The gas generation and storage device (4) is used for releasing and storing test gas, wherein the test gas includes water vapor, carbon dioxide gas and / or hydrogen sulfide gas.

12. The system according to claim 1, wherein: The air extraction device (5) is used to evacuate the environment inside the tube sample (7) and is used when the tube sample (7) is under negative pressure; the air extraction device (5) includes a molecular pump.

13. The system according to claim 1, wherein: The pipeline control device (6) is used to switch the on / off state of the gas in the pipeline; the pipeline control device (6) includes a control cabinet.

14. A test method based on a high temperature pipe test system according to any one of claims 1 to 13, characterized in that: include: S1: Fasten the tube sample (7) between the two test fixtures (1), open the exhaust device (5), evacuate the inside of the tube sample (7), and close the exhaust device (5); S2: Turn on the gas generation and storage device (4), introduce test gas into the tube sample (7), turn on the pressure control system (2) and the pressurizing device (3) to control the pressure of the test gas, and start the test.

15. The method according to claim 14, characterized in that: The step S1 further includes: The connection between the fastened pipe sample (7) and the test fixture (1) is welded.

16. The method according to claim 14, characterized in that: Also includes: S3: After the test, if the test gas is harmful, the gas extraction device (5) is turned on to extract the test gas into the gas generation and storage device (4), the gas extraction device (5) is turned off, and the gas flow in the pipeline is cut off through the pipeline control device (6).

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