Pipeline stress detection system and detection method

Abstract

The application belongs to the technical field of pipeline detection, and discloses a pipeline stress detection system and a detection method. The pipeline stress detection system comprises a clamping assembly, a test bench, a detection assembly and a control assembly. The clamping assembly is used for clamping a pipeline to be detected. The clamping assembly can drive the pipeline to be detected to rotate around an axis of the pipeline to be detected. The clamping assembly can also drive the pipeline to be detected to stretch along an axial direction. The test bench is configured to place the clamping assembly. The detection assembly is arranged on the test bench and comprises a detection probe. The detection probe can move relative to the pipeline to be detected along an X direction, a Y direction and a Z direction, respectively. The Y direction is parallel to the axial direction of the pipeline to be detected. The control assembly is communicatively connected to the detection probe and can control the moving distance and the moving speed of the detection probe. The pipeline stress detection system can realize accurate control of the sensor, and ensure the stability of the test process and the accuracy of the test data.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, and in particular to a pipeline stress detection system and method. Background Technology

[0002] Stress concentration is widespread in oil pipelines. In areas of stress concentration, pipeline properties change, making them highly susceptible to cracks, deformation, and fractures, posing a significant threat to life and property. Therefore, stress testing of pipelines is an essential and crucial step.

[0003] Currently, pipeline stress detection methods include the Barkhausen noise method, magnetic memory method, and alternating magnetic field stress measurement method (ACSM). Among these, the Barkhausen noise method is fast, but it is not yet fully mature. The magnetic memory method is simple to operate and requires no excitation, but its accuracy is low. The alternating magnetic field stress measurement method is fast, accurate, and can perform long-distance measurements, making it well-suited for stress detection in long-distance oil pipelines. However, the sensor's displacement path, lift-off value, and detection speed can all affect the accuracy of the results, leading to errors in the stress detection signal.

[0004] Therefore, there is an urgent need for a pipeline stress detection system and method to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, a pipeline stress detection system is provided, which enables precise control of the sensor, ensuring the stability of the testing process and the accuracy of the test data.

[0006] To achieve this objective, the present invention adopts the following technical solution: Pipeline stress detection system, including: A clamping assembly for clamping a pipe to be tested, the clamping assembly being able to drive the pipe to be tested to rotate about its own axis, and the clamping assembly being able to drive the pipe to be tested to stretch axially; A test bench is configured to hold the clamping assembly; The detection component, mounted on the test bench, includes a detection probe that can move relative to the pipe under test along the X, Y, and Z directions, respectively, with the Y direction parallel to the axial direction of the pipe under test. The control component is connected to the detection probe and is capable of controlling the movement distance and speed of the detection probe.

[0007] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the detection component further includes a guide structure, which is detachably installed on the test bench. The detection probe is connected to the guide structure, and the guide structure can guide the movement of the detection probe in the X, Y and Z directions, respectively.

[0008] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the guide structure includes a first guide rail, a second guide rail, and a third guide rail. The first guide rail extends along the Y direction and is disposed on the test bench. The second guide rail extends along the Z direction and is slidably disposed on the first guide rail along the Y direction. The third guide rail extends along the X direction and is slidably disposed on the second guide rail along the Z direction. The detection probe is slidably disposed on the third guide rail along the X direction.

[0009] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the detection component further includes a first driving member, which is disposed on the first guide rail, and the output end of the first driving member is throttle-connected to the second guide rail; and / or, The detection component further includes a second driving member, which is disposed on the second guide rail, and the output end of the second driving member is drively connected to the third guide rail; and / or The detection component further includes a third driving element, which is disposed on the second guide rail, and the output end of the third driving element is connected to the detection probe.

[0010] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the detection probe includes a probe mounting plate, an elastic connector, and a sensing probe, wherein the sensing probe is mounted on the probe mounting plate via the elastic connector.

[0011] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the detection probe further includes a mileage detection component, which is connected to the probe mounting plate and can detect the moving distance and moving speed of the sensing probe.

[0012] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, multiple sensing probes are provided, and the multiple sensing probes are installed side by side on the probe mounting plate.

[0013] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the clamping assembly includes a clamping frame, a rotation drive component, and an axial drive component. The clamping frame is used to fix the pipeline to be tested. The rotation drive component is disposed on the clamping frame and is connected to the pipeline to be tested, and can drive the pipeline to be tested to rotate around its own axis. Multiple axial drive components are provided and are arranged at intervals along the circumference of the pipeline to be tested. The axial drive components can drive the pipeline to be tested to stretch axially.

[0014] As an optional solution to the pipeline stress detection system provided in this embodiment of the invention, the test bench has a cuboid frame structure, and the axial direction of the pipeline to be tested is fixed inside the test bench parallel to the length direction of the test bench.

[0015] According to another aspect of the present invention, a pipeline stress detection method is provided, wherein the pipeline stress detection method uses the pipeline stress detection system described in any one of the preceding claims to perform stress testing on the pipeline under test, comprising: S100. The pipe to be tested is clamped using a clamping assembly to form a test sample; S200. Fix the test sample inside the test bench and calibrate the initial displacement zero point of the detection probe; S300. The detection probe is controlled by the control component to scan and detect the pipeline under test along preset parameters. S400: The control component collects the detection data from the detection probe and outputs the detection results.

[0016] The beneficial effects of this invention are: The pipeline stress testing system provided by this invention uses a clamping assembly to hold the pipeline under test, and a test bench to fix the clamping assembly. This ensures the stability of the pipeline under test during testing, thereby guaranteeing the accuracy of the test results. The clamping assembly can drive the pipeline under test to rotate around its own axis, and it can also drive the pipeline under test to stretch axially. The detection assembly, mounted on the test bench, includes a detection probe that can move relative to the pipeline under test along the X, Y, and Z directions, with the Y direction parallel to the axial direction of the pipeline. A control assembly is communicatively connected to the detection probe and can control the probe's moving distance and speed. In other words, through the coordinated action of the clamping assembly, detection assembly, and control assembly, precise control of the detection probe's movement direction and path in three-dimensional space can be achieved, ensuring the stability of the testing process and the accuracy of the test data. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the pipeline stress detection system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the clamping assembly and the pipe under test provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the testing bench provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first guide rail provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the second guide rail provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the third guide rail provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the detection probe provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the mileage detection device provided in an embodiment of the present invention.

[0019] In the picture: 100. The pipeline to be tested; 1. Clamping assembly; 11. Clamping frame; 12. Rotation drive component; 13. Axial drive component; 2. Test bench; 21. Profile; 22. Reinforcing plate; 3. Detection components; 31. Detection probe; 311. Probe mounting plate; 312. Elastic connector; 313. Sensing probe; 314. Mileage detection component; 32. First guide rail; 33. Second guide rail; 34. Third guide rail; 35. First drive component; 36. Second drive component; 37. Third drive component; 38. Probe connector. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] This embodiment provides a pipeline stress detection system, such as Figure 1 As shown, the pipeline stress detection system includes a clamping assembly 1, a test bench 2, a detection assembly 3, and a control assembly (not shown).

[0030] The system includes a clamping assembly 1 for holding the pipe under test 100. The clamping assembly 1 can drive the pipe under test 100 to rotate around its own axis and can also drive the pipe under test 100 to stretch axially. A test bench 2 is configured to hold the clamping assembly 1. A detection assembly 3 is mounted on the test bench 2 and includes a detection probe 31. The detection probe 31 can move relative to the pipe under test 100 along the X, Y, and Z directions, respectively, with the Y direction parallel to the axial direction of the pipe under test 100. A control assembly is communicatively connected to the detection probe 31 and can control the moving distance and speed of the detection probe 31. This pipe stress detection system, by clamping the pipe under test 100 with the clamping assembly 1 and fixing the clamping assembly 1 with the test bench 2, ensures the stability of the pipe under test 100 during testing, thereby ensuring the accuracy of the test results. Furthermore, through the coordinated action of the clamping assembly 1, the detection assembly 3, and the control assembly, precise control of the moving direction and path of the detection probe 31 in three-dimensional space can be achieved, ensuring the stability of the testing process and the accuracy of the test data.

[0031] Optionally, such as Figure 1 and Figure 2 As shown, the clamping assembly 1 includes a clamping frame 11, a rotation drive member 12, and an axial drive member 13. The clamping frame 11 is used to fix the pipe 100 under test, and the clamping frame 11 is sleeved and fixed to the outside of the pipe 100 under test. The rotation drive member 12 is disposed on the clamping frame 11 and is connected to the pipe 100 under test, and can drive the pipe 100 under test to rotate around its own axis. Multiple axial drive members 13 are provided, and the multiple axial drive members 13 are arranged at intervals along the circumference of the pipe 100 under test, and the axial drive members 13 can drive the pipe 100 under test to be stretched axially. By using the rotation drive member 12 and the axial drive member 13, the stress conditions of the pipe 100 under test under different stress states can be simulated.

[0032] In this embodiment, the clamp 11 can meet the testing of large-sized pipes 100, which are over 1700mm long and over 400mm wide.

[0033] Specifically, the rotation drive 12 is a stepper motor. Power is provided by the stepper motor, so that the pipe under test 100 can rotate at any angle along its own axis, thereby enabling comprehensive inspection of the entire pipe.

[0034] More specifically, the axial drive component 13 is a hydraulic jack, and the direction of force application of the hydraulic jack is parallel to the axis of the pipe 100 under test. Multiple axial drive components 13 can be used to simulate different loading conditions. These different loading conditions include, but are not limited to, various typical working conditions such as constant rate tension, stepped loading, or cyclic loading.

[0035] like Figure 1 and Figure 3 As shown, the test bench 2 has a cuboid frame structure, and the axial direction of the pipe 100 to be tested is parallel to the length direction of the test bench 2 and fixed inside the test bench 2. Precisely placing and fixing the pipe 100 to be tested in the test bench 2 ensures that the pipe 100 is firmly clamped and that the direction of force applied is consistent with the direction of stress applied by the subsequent axial drive component 13. This prevents the pipe 100 from shifting, loosening, or undergoing unexpected deformation during the loading test, thus ensuring the stability of the test benchmark.

[0036] In this embodiment, the test bench 2 is assembled from multiple profiles 21. The apex formed by any two profiles 21 is fixed by a reinforcing plate 22, thereby ensuring the stability of the entire test bench 2. The profiles 21 and the reinforcing plate 22 are detachably connected by bolts, which facilitates the replacement of test benches 2 with different specifications and the transportation and disassembly of the test bench 2.

[0037] For example, the profile 21 can be an aluminum profile. Aluminum profiles are lightweight but have high specific strength and good structural stability.

[0038] Continue to refer to Figure 1 and Figure 4-6 The detection assembly 3 also includes a guide structure. The guide structure is detachably mounted on the test bench 2, and the detection probe 31 is connected to the guide structure. The guide structure can guide the movement of the detection probe 31 in the X, Y, and Z directions respectively, thereby ensuring the smooth movement of the detection probe 31.

[0039] Specifically, the guide structure includes a first guide rail 32, a second guide rail 33, and a third guide rail 34. The first guide rail 32 extends along the Y direction and is mounted on the test bench 2. The second guide rail 33 extends along the Z direction and is slidably mounted on the first guide rail 32 along the Y direction. The third guide rail 34 extends along the X direction and is slidably mounted on the second guide rail 33 along the Z direction. The detection probe 31 is slidably mounted on the third guide rail 34 along the X direction. This guide structure can be selected as a high-rigidity, high-flatness precision three-dimensional electric guide rail system from the prior art. This structure can effectively suppress motion vibration and ensure the stability of the detection probe 31 under high-speed scanning. The travel range of each guide rail is configured as follows: the first guide rail 32 is not less than 1700 mm, the third guide rail 34 is not less than 700 mm, and the second guide rail 33 is not less than 200 mm.

[0040] In this embodiment, two first guide rails 32 are provided, and the two first guide rails 32 are respectively installed on the two long sides of the test bench 2. Two second guide rails 33 are provided, and are respectively installed on the two first guide rails 32. A third guide rail 34 is connected between the two second guide rails 33, and a probe connecting seat 38 is provided on the third guide rail 34. The detection probe 31 is installed on the probe connecting seat 38. The detection probe 31 can reciprocate along the X, Y and Z directions on the corresponding guide rails, thereby completing the stress detection of the pipe 100 under test.

[0041] More specifically, the detection component 3 also includes a first driving member 35, which is disposed on the first guide rail 32, and the output end of the first driving member 35 is connected to the second guide rail 33. The first driving member 35 is used to drive the second guide rail 33 to reciprocate along the first guide rail 32.

[0042] More specifically, the detection component 3 also includes a second driving member 36, which is disposed on the second guide rail 33, and the output end of the second driving member 36 is connected to the third guide rail 34. The second driving member 36 is used to drive the third guide rail 34 to reciprocate along the second guide rail 33.

[0043] More specifically, the detection assembly 3 also includes a third driving member 37, which is disposed on the second guide rail 33, and the output end of the third driving member 37 is connected to the detection probe 31. The third driving member 37 is used to drive the detection probe 31 to reciprocate along the third guide rail 34.

[0044] In this embodiment, the first driving component 35, the second driving component 36, and the third driving component 37 can all be selected from high-precision stepper motors in the prior art. This high-precision stepper motor, based on a hybrid and closed-loop design, achieves micron-level positioning and low-vibration drive through microstepping, encoder feedback, and precision structural design. The parameters of this high-precision stepper motor are adjustable to stably control the displacement and speed of the detection probe 31. Adjusting the parameters of the X and Y axes changes the scanning path of the detection probe 31, while adjusting the parameters of the Z axis changes the lift-off value of the detection probe 31. The parameters in this embodiment enable dynamic scanning with a lift-off value of 1-10 mm and a speed of 0.1-5.0 m / s.

[0045] Continue to refer to Figure 1 , Figure 7 and Figure 8 The detection probe 31 includes a probe mounting plate 311, an elastic connector 312, and a sensing probe 313. The sensing probe 313 is mounted on the probe mounting plate 311 via the elastic connector 312. Specifically, the sensing probe 313 is an ACSM stress sensor probe. The elastic connector 312 is a flexible spring. The ACSM stress sensor probe is fixed to the probe mounting plate 311 via the flexible spring. By providing the elastic connector 312, the sensing probe 313 can have a certain amount of flexible floating in the vertical direction to adapt to the surface undulations of the pipe 100 under test and maintain a stable lift-off value.

[0046] Specifically, the detection probe 31 also includes a mileage detection element 314. The mileage detection element 314 is connected to the probe mounting plate 311 and can detect the moving distance and speed of the sensing probe 313. The mileage detection element 314 can specifically be a mileage wheel. The mileage detection element 314 is communicatively connected to the control component, forming a closed-loop feedback. The control component can adjust the output pulses of each drive component based on the real-time speed data fed back by the mileage detection element 314, enabling the sensing probe 313 to achieve constant speed scanning within the range of 0.1 m / s to 5.0 m / s. Simultaneously, the mileage detection element 314 also functions as a displacement monitoring element. Through the mileage detection element 314, the lift-off gap between the sensing probe 313 and the pipe 100 under test can be monitored in real time and automatically compensated, ensuring that the lift-off value remains constant throughout the test, eliminating interference from lift-off value changes on the sensing probe 313's detection signal, and improving the accuracy and repeatability of the test data.

[0047] More specifically, multiple sensing probes 313 are provided, and the multiple sensing probes 313 are mounted side by side on the probe mounting plate 311. In this embodiment, three sensing probes 313 are provided, and the three sensing probes 313 are respectively mounted on the probe mounting plate 311 through elastic connectors 312, which can flexibly adjust the distance from the surface of the pipe 100 to be tested within a certain range. All of the multiple sensing probes 313 can communicate with the control component, which has a multi-channel synchronous triggering function, used to compare the detection signals of multiple sensing probes 313 under the same displacement coordinate, and can evaluate the consistency of the signals.

[0048] Optionally, the control component (not shown) can be a high-performance multi-axis motion control card from the prior art. A high-performance multi-axis motion control card is a core control unit that integrates a high-performance processor and a dedicated motion control chip, enabling multi-axis synchronization, high-speed trajectory planning, and closed-loop control. By driving the aforementioned high-precision stepper motor through this high-performance multi-axis motion control card, nanometer / micrometer-level positioning accuracy and smooth motion trajectory control can be achieved, ensuring the accurate execution of complex scanning paths.

[0049] Alternatively, the pipeline stress detection system also includes a display component (not shown), which is communicatively connected to the control component. This display component can be a touchscreen display. The touchscreen display has a built-in motion logic hybrid control module, supporting adjustable lift-off values ​​within the range of 1mm to 10mm via Chinese-guided programming, and supports setting complex two-dimensional or three-dimensional scanning trajectory schemes.

[0050] In this embodiment, a high-performance multi-axis motion control card is used as the control core to uniformly regulate the detection component 3. Through the preset control program, the scanning trajectory, motion accuracy and action synchronization of the detection probe 31 are precisely controlled to ensure that the detection probe 31 can stably and reliably perform stress detection on the pipeline 100 under test in accordance with the preset test requirements.

[0051] Based on the pipeline stress detection system provided in this embodiment, dynamic testing experiments were conducted on the ACSM stress sensor on the pipeline 100 under different working conditions in a controlled laboratory environment. During the test, the system comprehensively tested the dynamic response performance of the ACSM stress sensor under different loading conditions, different material strengths, different magnetization states, different lift-off values, and different detection speeds.

[0052] Power is applied by the rotation drive 12 in the clamping assembly 1, allowing the pipe under test 100 to rotate at any angle along its own axis, enabling comprehensive testing of the entire pipe. The axial drive 13 in the clamping assembly 1 simulates different loading conditions applied to the pipe under test 100, including but not limited to constant-rate tension, stepped loading, and cyclic loading. Different material strengths correspond to different strength grades of the substrate used in the pipe under test 100, simulating the sensor's application scenarios on different stress carriers. Different magnetization states are preset initial magnetization parameters for the pipe under test 100 and the ACSM stress sensor, used to verify the influence of magnetization state on the sensor's testing performance. Different lift-off values ​​are different preset distances between the ACSM stress sensor probe and the detection surface of the pipe under test 100. Different detection speeds are different scanning movement rates of the detection assembly 3. Through these settings, various working conditions that the ACSM stress sensor may encounter in practical applications can be comprehensively covered, ensuring the comprehensiveness and reliability of the test results, and providing solid experimental data support for sensor performance optimization and practical engineering applications.

[0053] This embodiment also provides a pipeline stress detection method, which uses the pipeline stress detection system provided in this embodiment to perform stress testing on the pipeline 100 to be tested. The pipeline stress detection method includes: S100. The pipe to be tested 100 is clamped by the clamping assembly 1 to form a test sample. Specifically, pipes 100 of different material grades or magnetization states are fixed in the clamping frame 11 to form a test sample.

[0054] S200. Fix the test sample inside the test bench 2 and calibrate the initial displacement zero point of the detection probe 31. This setting can eliminate initial installation and mechanical deviations, deduct static lift-off, eliminate lift-off effect interference, unify the measurement benchmark, and ensure repeatability.

[0055] S300: The detection probe 31 is controlled by the control component to scan and detect the pipeline 100 under test along preset parameters. These preset parameters may include dynamic scanning speed, target lift-off value, and scanning path step parameters.

[0056] Furthermore, during the process of the control component controlling the movement of the detection probe 31, the control component can also correct the running speed in real time through the feedback of the mileage detection element 314, avoid the distortion of the detection signal caused by speed fluctuations, ensure the stability of the motion state of the detection probe 31 during the test, provide a reliable motion benchmark for stability testing, and thus better ensure the accuracy of the detection results.

[0057] S400: The control component acquires the detection data of the detection probe 31 and outputs the detection results. During the movement of the detection probe 31, the detection signals of multiple probes and their corresponding spatial coordinates are acquired simultaneously. By comparing the signal fluctuation characteristics under different scanning times and between different detection probes 31, the stability and signal consistency evaluation results of the detection probe 31 are obtained.

[0058] The pipeline stress detection system and method provided in this embodiment can achieve precise control of the displacement path, lift-off value, detection speed and different stress states of the sensor in three-dimensional space, improve the testing stability and repeatability of ACSM stress sensor under different working conditions, and can also be applied to the testing and calibration of pipeline stress sensor.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pipeline stress detection system, characterized in that, include: A clamping assembly (1) is used to clamp the pipe to be tested (100). The clamping assembly (1) can drive the pipe to be tested (100) to rotate around its own axis. The clamping assembly (1) can also drive the pipe to be tested (100) to stretch axially. The test bench (2) is configured to hold the clamping assembly (1); The detection component (3) is set on the test bench (2) and includes a detection probe (31). The detection probe (31) can move relative to the pipe to be tested (100) along the X direction, Y direction and Z direction respectively. The Y direction is parallel to the axis of the pipe to be tested (100). The control component is connected to the detection probe (31) and is capable of controlling the moving distance and moving speed of the detection probe (31).

2. The pipeline stress detection system according to claim 1, characterized in that, The detection component (3) also includes a guide structure, which is detachably mounted on the test bench (2). The detection probe (31) is connected to the guide structure, which can guide the movement of the detection probe (31) in the X, Y and Z directions respectively.

3. The pipeline stress detection system according to claim 2, characterized in that, The guiding structure includes a first guide rail (32), a second guide rail (33), and a third guide rail (34). The first guide rail (32) extends along the Y direction and is disposed on the test bench (2). The second guide rail (33) extends along the Z direction and is slidably disposed on the first guide rail (32) along the Y direction. The third guide rail (34) extends along the X direction and is slidably disposed on the second guide rail (33) along the Z direction. The detection probe (31) is slidably disposed on the third guide rail (34) along the X direction.

4. The pipeline stress detection system according to claim 3, characterized in that, The detection component (3) further includes a first driving member (35), which is disposed on the first guide rail (32), and the output end of the first driving member (35) is connected to the second guide rail (33); and / or, The detection component (3) further includes a second driving member (36), which is disposed on the second guide rail (33), and the output end of the second driving member (36) is connected to the third guide rail (34); and / or, The detection component (3) further includes a third driving element (37), which is disposed on the second guide rail (33), and the output end of the third driving element (37) is connected to the detection probe (31).

5. The pipeline stress detection system according to claim 1, characterized in that, The detection probe (31) includes a probe mounting plate (311), an elastic connector (312), and a sensing probe (313). The sensing probe (313) is mounted on the probe mounting plate (311) via the elastic connector (312).

6. The pipeline stress detection system according to claim 5, characterized in that, The detection probe (31) also includes a mileage detection element (314), which is connected to the probe mounting plate (311) and can detect the moving distance and moving speed of the sensing probe (313).

7. The pipeline stress detection system according to claim 5, characterized in that, Multiple sensing probes (313) are provided, and multiple sensing probes (313) are installed side by side on the probe mounting plate (311).

8. The pipeline stress detection system according to any one of claims 1-7, characterized in that, The clamping assembly (1) includes a clamping frame (11), a rotation drive (12), and an axial drive (13). The clamping frame (11) is used to fix the pipe to be tested (100). The rotation drive (12) is disposed on the clamping frame (11) and is connected to the pipe to be tested (100) in a transmission manner. It can drive the pipe to be tested (100) to rotate around its own axis. Multiple axial drive (13) are provided. Multiple axial drive (13) are arranged at intervals along the circumference of the pipe to be tested (100). The axial drive (13) can drive the pipe to be tested (100) to be stretched axially.

9. The pipeline stress detection system according to any one of claims 1-7, characterized in that, The test bench (2) has a cuboid frame structure, and the axial direction of the pipe to be tested (100) is parallel to the length direction of the test bench (2) and fixed inside the test bench (2).

10. A method for detecting pipeline stress, characterized in that, The stress test of the pipeline (100) under test is performed using the pipeline stress testing system as described in any one of claims 1-9, including: S100. The pipe to be tested (100) is clamped using the clamping assembly (1) to form a test sample; S200. Fix the test sample in the test bench (2) and calibrate the initial displacement zero point of the detection probe (31); S300, The detection probe (31) is controlled by the control component to scan and detect the pipeline (100) under test along preset parameters; S400: The detection data of the detection probe (31) is collected by the control component and the detection result is output.

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