Hydrogen-doped natural gas polyethylene pipeline aging test device and method

Abstract

This invention relates to the field of pipeline testing, and more particularly to an aging test device and method for hydrogen-blended natural gas polyethylene pipelines. The aging test device for hydrogen-blended natural gas polyethylene pipelines includes a mounting block and a drive motor mounted on the mounting block. An arc-shaped plate is fixedly connected to the mounting block, and another arc-shaped plate is rotatably connected to the mounting block. The output of the drive motor is fixedly connected to one of the arc-shaped plates. Each arc-shaped plate is equipped with a slide rail, and an arc-shaped slider is slidably connected to the slide rail. The arc-shaped slider drives a camera to rotate, which, in conjunction with the extension and retraction of an electric push rod, enables automatic detection of the exposed pipeline surface. Simultaneously, the electric rollers on the two arc-shaped plates move towards each other, compressing the pipeline and causing cracks on the pipeline surface facing the camera to expand due to pressure, facilitating the detection of small cracks on the pipeline surface by the camera.

Description

Technical Field

[0001] This invention relates to the field of pipeline testing, and more particularly to an aging test device and method for hydrogen-blended natural gas polyethylene pipelines. Background Technology

[0002] Polyethylene pipes have great potential for application in the transportation of hydrogen-blended natural gas due to their excellent chemical corrosion resistance, mechanical properties, and weldability.

[0003] During the transportation of hydrogen-blended natural gas through buried polyethylene pipelines, the pipelines will age over time. To ensure the safety of natural gas transportation, the aging condition of the pipelines is usually inspected after a period of use. The commonly used inspection method is excavation inspection, which involves digging out a portion of the pipeline to allow for direct manual observation of its aging condition. However, manual inspection is inefficient and makes it difficult to detect small cracks on the pipeline surface in a timely manner. In addition, the excavated pipeline surface is often covered with soil, which further affects the accuracy of the inspection.

[0004] In summary, this application proposes an aging test device for hydrogen-doped natural gas polyethylene pipelines, which improves the aforementioned technical problems. Summary of the Invention

[0005] To overcome the shortcomings of low efficiency in manual observation, difficulty in timely detection of small cracks on the pipeline surface, and the impact of soil adhering to the pipeline surface on the accuracy of detection, this invention provides an aging test device and method for hydrogen-doped natural gas polyethylene pipelines.

[0006] Technical Solution: An aging test device for hydrogen-blended natural gas polyethylene pipelines includes an installation block and a drive motor mounted on the installation block. An arc-shaped plate is fixedly connected to the installation block, and another arc-shaped plate is rotatably connected to the installation block. The output of the drive motor is fixedly connected to one of the arc-shaped plates. The device also includes a hollow arc-shaped slider. Each arc-shaped plate is equipped with a slide rail, which slidably connects to the arc-shaped slider. The arc-shaped slider has several through holes. Several electric push rods are fixedly connected to the arc-shaped slider. Each electric push rod's telescopic section is fixedly connected to a fixing plate. Every two corresponding fixing plates are rotatably connected to a cleaning block for cleaning the pipeline surface, and the cleaning block is located at the through hole. A micro motor is fixedly connected to the fixing plate, and the output of the micro motor is fixedly connected to the cleaning block. Among the cleaning blocks distributed circumferentially along the arc-shaped slider, the middle cleaning block is fixedly connected to a camera for capturing and detecting cracks on the pipeline surface.

[0007] More preferably, it also includes an electric roller; the cleaning block is rotatably connected to an electric roller.

[0008] More preferably, the cleaning block has several grooves.

[0009] More preferably, the axial cross-section of the inner ring surface of the arc-shaped slider has an arc-shaped protrusion.

[0010] More preferably, a rectangular sealing ring is installed on the cleaning block.

[0011] More preferably, it also includes two sliding rods fixed to the mounting block one; the mounting block one is fixedly connected to an electric push rod two; the telescopic part of the electric push rod two is fixedly connected to the mounting block two, and the mounting block two is slidably connected to the sliding rods; the mounting block two is fixedly connected to an arc-shaped plate two, and the mounting block two is rotatably connected to another arc-shaped plate two; the mounting block two is fixedly connected to a drive motor two, and the output part of the drive motor two is fixedly connected to one of the arc-shaped plates two; the arc-shaped plate two is equipped with a slide rail, and the slide rail is slidably connected to an arc-shaped slider two; the arc-shaped slider two has several through holes; the arc-shaped slider two is fixedly connected to several electric telescopic rods; each electric telescopic rod telescopic part is fixedly connected to a top block located at the through hole.

[0012] More preferably, the surface of the top block is set to a rough surface.

[0013] More preferably, it also includes a second camera fixed to one of the curved plates, and the second camera is located on the side of the curved plate closer to the second curved plate.

[0014] More preferably, the second camera is mounted on the upper side of the curved plate.

[0015] More preferably, an aging test method for hydrogen-blended natural gas polyethylene pipelines includes the following steps: Step 1: Rotate one of the arc-shaped plates 1 and 2 to open it. Then move the device to the vicinity of the pipe and control the rotation of arc-shaped plates 1 and 2 to surround the pipe in conjunction with the other arc-shaped plates 1 and 2. Step 2: Control the electric push rod to move the cleaning block, and control the arc-shaped slider to rotate the cleaning block, thereby realizing the automatic cleaning of the mud on the surface of the pipe; Step 3: Rotate the cleaning block so that camera one faces the pipe surface. Camera one observes and inspects the pipe surface. During the inspection, electric rollers squeeze the pipe to enlarge the small cracks on the pipe surface so that camera one can observe and inspect them. Step 4: The electric roller and the top block are used to hold the fixed pipe in place. Then, the electric push rod is extended to stretch the pipe and the electric roller and the top block are moved to press the pipe. The physical properties of the pipe after use are tested to further evaluate the aging of the pipe and improve the accuracy of pipe aging detection.

[0016] Beneficial effects: By rotating the camera through the arc-shaped slider and extending and retracting the electric push rod, the exposed pipe surface can be automatically detected. At the same time, the electric rollers on the two arc-shaped plates move towards each other, squeezing the pipe and causing the cracks on the pipe surface facing the camera to expand under pressure. This makes it easier for the camera to detect small cracks on the pipe surface, avoiding the problems of low efficiency and difficulty in timely detection of small cracks on the pipe surface by manual observation.

[0017] The cleaning block cleans the pipe surface, and with the retraction of the electric push rod two, the arc plate one moves along the slide rod to the arc plate two, thereby cleaning the dirt on the pipe surface between the arc plate one and the arc plate two, realizing automatic cleaning of the pipe surface, so as to improve the accuracy of pipe surface inspection; and by storing the camera one and the electric roller inside the arc slider one for isolation and protection, the dirt cleaned off is prevented from coming into contact with the camera one, ensuring the normal operation of subsequent inspections. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the hydrogen-doped natural gas polyethylene pipeline aging test device disclosed in this invention; Figure 2 This is a state diagram of the pipeline during inspection as disclosed in this invention; Figure 3 This is a schematic diagram of the internal structure of the arc-shaped slider disclosed in this invention; Figure 4 This is a schematic diagram of the structure of the arc-shaped plate, arc-shaped slider, electric push rod, fixing plate, cleaning block, camera, electric roller and micro motor assembly disclosed in this invention; Figure 5 This is a schematic diagram of the structure of the electric push rod, fixing plate, cleaning block and micro motor assembly disclosed in this invention; Figure 6 This is a schematic diagram of the structure of the mounting block 2, drive motor 2, arc plate 2, arc slider 2, electric telescopic rod and top block assembly disclosed in this invention; Figure 7 This is a schematic diagram of the structure of the mounting block one and camera two as disclosed in this invention.

[0019] The markings in the diagram are as follows: 1-Mounting block one, 2-Drive motor one, 3-Arc plate one, 4-Arc slider one, 5-Electric push rod one, 6-Fixing plate, 7-Cleaning block, 8-Camera one, 9-Electric roller, 10-Miniature motor, 110-Slide rod, 111-Electric push rod two, 112-Mounting block two, 113-Drive motor two, 114-Arc plate two, 115-Arc slider two, 116-Electric telescopic rod, 117-Top block, 201-Camera two, 41-Through hole, 11501-Through hole. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0021] Example 1: An aging test device for hydrogen-blended natural gas polyethylene pipelines, referring to... Figures 1-6 As shown, it includes a mounting block 1, a drive motor 2, and an arc plate 3; the mounting block 1 is fixedly connected to an arc plate 3, and the mounting block 1 is rotatably connected to another arc plate 3; the mounting block 1 is fixedly connected to the drive motor 2, and the output part of the drive motor 2 is fixedly connected to one of the arc plates 3. It also includes an arc-shaped slider 4, an electric push rod 5, a fixed plate 6, a cleaning block 7, a camera 8, and a micro motor 10; each arc-shaped plate 3 has a slide rail installed on its inner ring surface, and the arc-shaped slider 4 is slidably connected to the slide rail. The arc-shaped slider 4 is designed as a hollow structure, and a synchronous belt is installed on the slide rail; the arc-shaped slider 4 has a built-in motor, and the output shaft of the motor is connected to a gear, which meshes with the synchronous belt; when the motor drives the gear to rotate, it drives the arc-shaped slider 4 to move along the slide rail; the arc-shaped slider 4 has three through holes 41; several electric push rods 5 are fixedly connected to the arc-shaped slider 4; each electric push rod 5 has a fixed plate 6 fixedly connected to its telescopic part; every two corresponding fixed plates 6 are rotatably connected to a cleaning block 7, and the cleaning block 7 is located at the through hole 41; the fixed plate 6 is fixedly connected to the micro motor 10, and the output part of the micro motor 10 is fixedly connected to the cleaning block 7; among the cleaning blocks 7 distributed around the arc-shaped slider 4, the cleaning block 7 located in the middle is fixedly connected to the camera 8.

[0022] It also includes an electric roller 9; each of the cleaning blocks 7 located on the upper and lower sides is rotatably connected to an electric roller 9, which consists of a motor and a roller, and the motor is used to drive the roller to rotate.

[0023] The surface of the cleaning block 7 has several grooves, which can increase the roughness of the surface of the cleaning block 7 and improve the cleaning effect of the cleaning block 7 on the soil.

[0024] The axial cross-section of the inner ring surface of the arc-shaped slider 4 is arc-shaped and protruding. When cleaning the soil on the surface of the polyethylene pipe, the soil falling on the inner side of the arc-shaped slider 4 can slide to both sides, preventing the soil from accumulating on the arc-shaped slider 4 and affecting subsequent testing.

[0025] A rectangular sealing ring is installed on the cleaning block 7. The cleaning block 7 seals the through hole 41 through the rectangular sealing ring, so that the camera 8 is housed in the arc-shaped slider 4, preventing the dirt from contacting the camera 8 when cleaning the surface of the pipe, thus affecting its observation and shooting.

[0026] It also includes a slide rod 110, an electric push rod 111, a mounting block 112, a drive motor 113, an arc plate 114, an arc slider 115, an electric telescopic rod 116, and a top block 117; the electric push rod 111 is fixedly connected to the mounting block 111; the telescopic part of the electric push rod 111 is fixedly connected to the mounting block 112; two slide rods 110 are fixedly connected to the mounting block 111, and the mounting block 112 is slidably connected to the slide rods 110; one arc plate 114 is fixedly connected to the mounting block 112, and another arc plate 114 is rotatably connected to the mounting block 112; the drive motor 113 is fixedly connected to the mounting block 112, and the drive motor... The output part of the second 113 is fixedly connected to one of the arc-shaped plates 114; a slide rail is installed on the inner side of the arc-shaped plate 114, and an arc-shaped slider 115 is slidably connected to the slide rail. A synchronous belt is installed on the slide rail. The arc-shaped slider 115 has a built-in motor, and the output shaft of the motor is connected to a gear. The gear meshes with the synchronous belt. When the motor drives the gear to rotate, it drives the arc-shaped slider 115 to move on the slide rail; the arc-shaped slider 115 has three through holes 11501; several electric telescopic rods 116 are fixedly connected to the arc-shaped slider 115; each electric telescopic rod 116 has a top block 117 fixedly connected to its telescopic part, and the top block 117 is located at the through hole 11501.

[0027] The surface of the top block 117 is made rough, which can increase the friction between the top block 117 and the pipe surface and improve the overall device's fixation effect on the pipe.

[0028] This device is suitable for testing buried polyethylene pipes with a nominal diameter between 50mm and 200mm.

[0029] The following are the working steps for testing buried polyethylene pipelines: When it is necessary to conduct aging tests on buried polyethylene pipelines that have been in use for a long time, a portion of the buried polyethylene pipeline is manually excavated using excavation equipment. The pipeline is then observed to determine its aging condition. Considering that manual inspection is inefficient and it is difficult to detect small cracks on the pipeline surface in time, after the portion of the buried polyethylene pipeline is manually excavated, the device is then manually moved to the vicinity of the pipeline. First, drive motor 2 is controlled to rotate and open one of the arc-shaped plates 3, and simultaneously drive motor 113 is controlled to rotate and open one of the arc-shaped plates 114. Then, arc-shaped plates 3 and 114 are moved to the pipeline, and then arc-shaped plates 3 and 114 are rotated to surround the pipeline in conjunction with the other arc-shaped plate 3 and 114. Figure 2As shown, at this time, the slide rails on the two arc-shaped plates 113 form a complete slide rail, and the slide rails on the two arc-shaped plates 114 form a complete slide rail. Next, the electric telescopic rod 116 on the arc-shaped plate 114 is controlled to move the top block 117 towards the enclosed pipe until the top block 117 contacts the pipe. Several top blocks 117 hold the pipe in place, thus fixing the device to the pipe. Then, the electric push rod 5 on the arc-shaped plate 13 is controlled to move the fixing plate 6 and the cleaning block 7 into the arc-shaped slider 14. Then, the micro motor 10 is controlled to rotate the cleaning block 7 180 degrees, so that the camera 8 and the electric roller 9 are directly facing the through hole 41. Finally, the electric push rod... Step 5 moves camera 8 and electric roller 9 out of arc-shaped slider 4, then controls arc-shaped slider 4 to move camera 8 along the slide rail, causing camera 8 to rotate around the pipe. Camera 8 then images and inspects the pipe surface, recording the surface condition to the data center. Subsequent data analysis determines the pipe's aging status. Considering that small cracks on the pipe surface are difficult to detect fully through imaging, during camera 8's inspection, electric push rod 5 simultaneously moves electric roller 9 towards the pipe surface. The electric rollers 9 on the two arc-shaped plates 3 move towards each other, squeezing the pipe and causing it to move towards the camera. The cracks on the surface of pipe 8 are expanded under pressure, making it easier for camera 8 to detect small cracks on the pipe surface. During the detection process, by controlling the retraction of electric push rod 111, the arc plate 3 moves along slide rod 110 toward arc plate 114, thereby moving camera 8 to detect the pipe section between arc plate 3 and arc plate 114. When electric push rod 111 retracts to its limit, electric roller 9 moves to hold the pipe in place, and top block 117 resets to stop holding the pipe in place. Then, electric push rod 111 drives mounting block 112, drive motor 113, arc plate 114, and other connected components. The connected parts move along the pipe until the electric push rod 111 extends to its limit. Then, the top block 117 is moved to hold the pipe in place. The same operation is then performed to inspect other parts of the excavated pipe. In this way, the camera 8 is rotated by the arc-shaped slider 4, which, together with the extension and retraction of the electric push rod 111, enables automatic inspection of the exposed pipe surface. At the same time, the electric rollers 9 on the two arc-shaped plates 3 move towards each other, squeezing the pipe and causing the cracks on the pipe surface facing the camera 8 to expand under pressure. This allows the camera 8 to detect small cracks on the pipe surface, avoiding the problems of low efficiency and difficulty in timely detection of small cracks on the pipe surface by manual observation.

[0030] Furthermore, considering that the surface of the excavated pipe often has soil attached, which further affects the accuracy of the inspection, before the camera 8 inspects, the micro motor 10 is first controlled to drive the cleaning block 7 to rotate, such as... Figure 4As shown, camera 8 and electric roller 9 are housed inside arc-shaped slider 4. Then, electric push rod 5 on arc-shaped plate 3 is controlled to move fixed plate 6 and cleaning block 7, causing cleaning block 7 to contact the dirt on the pipe surface. Next, the slide rail on arc-shaped plate 3 is controlled to rotate arc-shaped slider 4, causing cleaning block 7 to rotate around the pipe surface, cleaning off the dirt. Simultaneously, during the cleaning process, electric push rod 111 retracts, causing arc-shaped plate 3 to move along slide rod 110 towards arc-shaped plate 114, thereby removing the dirt. The cleaning of the soil on the pipe surface between the arc plate 114 and the arc plate 214 achieves automatic cleaning of the pipe surface, thereby improving the accuracy of pipe surface inspection. After completion, the arc plate 113 is moved and reset, and the same operation is performed to inspect the pipe surface. It should be noted that during the cleaning process of the cleaning block 7, the camera 118 and the electric roller 9 are isolated and protected by being housed inside the arc slider 114, and the through hole 41 is sealed by the rectangular sealing ring on the cleaning block 7, thereby preventing the soil from coming into contact with the camera 118 and ensuring the normal progress of subsequent inspections.

[0031] Example 2: Based on Example 1, referring to... Figure 1 , Figure 6 and Figure 7 As shown, it also includes a second camera 201; the second camera 201 is fixedly connected to one side of the arc plate 3 near the arc plate 214.

[0032] Camera 201 is installed on the upper side of the arc plate 3 to reduce the contact between the soil and camera 201 and ensure the detection effect of the device.

[0033] An aging test method for hydrogen-blended natural gas polyethylene pipelines includes the following steps: Step 1: Rotate one of the arc-shaped plates 114 and 214 to open them. Then move the device to the vicinity of the pipe and control the rotation of the arc-shaped plates 114 and 214 to surround the pipe in conjunction with the other arc-shaped plates 114 and 214. Step 2: Control the electric push rod 5 to move the cleaning block 7, and control the arc-shaped slider 4 to rotate the cleaning block 7, thereby realizing the automatic cleaning of the mud on the surface of the pipe. Step 3: Rotate the cleaning block 7 so that the camera 8 faces the pipe surface. The pipe surface is observed and inspected through the camera 8. During the inspection, the pipe is squeezed by the electric roller 9 to expand the small cracks on the pipe surface so that the camera 8 can observe and inspect them. Step 4: The electric roller 9 and the top block 117 are used to hold the fixed pipe in place. Then, the electric push rod 111 is extended to stretch the pipe and the electric roller 9 and the top block 117 are moved to press the pipe. The physical properties of the pipe after use are tested to further evaluate the aging of the pipe and improve the accuracy of pipe aging detection.

[0034] Based on the above embodiment 1, the aging condition of the pipe after a period of use is determined by observing the surface condition of the pipe. However, this method can only determine the aging condition of the pipe surface; the aging condition of the pipe material itself also needs to be tested. Therefore, after testing the surface aging condition of the pipe between the first arc plate 3 and the second arc plate 114, the electric push rod 211 is extended again, causing the first arc plate 3 to move away from the second arc plate 114. Then, the electric push rod 5 is controlled to drive the electric roller 9 to move and press against the pipe, while the top block 117 is controlled to press against the pipe. Then, the electric push rod 211 is extended again, thereby testing the surface aging condition of the pipe between the first arc plate 3 and the second arc plate 114. Tensile testing is performed on the pipe between the two plates 114 to test the tensile strength of the pipe after use. During the test, the condition of the pipe is observed in real time through the camera 201. At the same time, the electric roller 9 and the top block 117 are moved and pressed by controlling the movement of the electric roller 9 and the top block 117 by the arc slider 14 and the arc slider 2 115 to adjust the position of the electric roller 9 and the top block 117 so that the pressure performance of various parts of the pipe can be tested. In this way, by testing the physical properties such as the tensile strength of the pipe after use, the test results are compared with the performance data of the unused pipe, so as to further determine the aging condition of the pipe after use and improve the accuracy of the pipe aging detection.

[0035] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A hydrogen-doped natural gas polyethylene pipeline aging test device, comprising a mounting block one (1) and a driving motor one (2) mounted on the mounting block one (1); the mounting block one (1) is fixedly connected with an arc plate one (3), the mounting block one (1) is rotatably connected with another arc plate one (3), and the output part of the driving motor one (2) is fixedly connected with one of the arc plates one (3); characterized in that, It also includes a hollow arc-shaped slider (4); each arc-shaped plate (3) is equipped with a slide rail, and the slide rail is slidably connected to the arc-shaped slider (4); the arc-shaped slider (4) has several through holes (41); the arc-shaped slider (4) is fixedly connected to several electric push rods (5); each electric push rod (5) has a fixed plate (6) fixedly connected to its telescopic part; every two corresponding fixed plates (6) are rotatably connected to a cleaning block (7) for cleaning the mud on the surface of the pipe, and the cleaning block (7) is located at the through hole (41); the fixed plate (6) is fixedly connected to a micro motor (10), and the output part of the micro motor (10) is fixedly connected to the cleaning block (7); among the cleaning blocks (7) distributed circumferentially along the arc-shaped slider (4), the middle cleaning block (7) is fixedly connected to a camera (8) for taking pictures and detecting cracks on the surface of the pipe.

2. The aging test device for hydrogen-blended natural gas polyethylene pipeline according to claim 1, characterized in that, It also includes an electric roller (9); the cleaning block (7) is rotatably connected to an electric roller (9).

3. An aging test device for hydrogen-blended natural gas polyethylene pipelines according to any one of claims 1-2, characterized in that, The cleaning block (7) has several grooves.

4. The aging test device for hydrogen-blended natural gas polyethylene pipeline according to claim 1, characterized in that, The axial section of the inner ring surface of the arc-shaped slider (4) is arc-shaped protrusion.

5. The aging test device for hydrogen-blended natural gas polyethylene pipeline according to claim 1, characterized in that, A rectangular sealing ring is installed on the cleaning block (7).

6. The aging test device for hydrogen-blended natural gas polyethylene pipeline according to claim 5, characterized in that, It also includes two sliding rods (110) fixed to mounting block one (1); electric push rod two (111) is fixed to mounting block one (1); mounting block two (112) is fixed to the telescopic part of electric push rod two (111), and mounting block two (112) is slidably connected to sliding rod (110); an arc plate two (114) is fixed to mounting block two (112), and another arc plate two (114) is rotatably connected to mounting block two (112); a drive motor two (112) is fixed to mounting block two (112). 113), and the output of the second drive motor (113) is fixedly connected to one of the arc plate two (114); the arc plate two (114) is equipped with a slide rail, and the slide rail is slidably connected to the arc slider two (115); the arc slider two (115) has several through holes (11501); the arc slider two (115) is fixedly connected to several electric telescopic rods (116); each electric telescopic rod (116) has a top block (117) fixedly connected to the telescopic part at the through hole (11501).

7. An aging test device for hydrogen-blended natural gas polyethylene pipelines according to claim 6, characterized in that, The surface of the top block (117) is set to a rough surface.

8. The aging test device for hydrogen-blended natural gas polyethylene pipeline according to claim 1, characterized in that, It also includes a second camera (201) fixed to one of the arc-shaped plates (3), and the second camera (201) is located on the side of the arc-shaped plate (3) closer to the second arc-shaped plate (114).

9. An aging test device for hydrogen-blended natural gas polyethylene pipelines according to claim 8, characterized in that, Camera 2 (201) is installed on the upper side of the arc plate 1 (3).

10. An aging test method for hydrogen-blended natural gas polyethylene pipelines, the method using the aging test device for hydrogen-blended natural gas polyethylene pipelines as described in claim 9, characterized in that... The steps include: Step 1: Rotate one of the arc plate 1 (3) and arc plate 2 (114) to open, then move the device to the vicinity of the pipe, and control the rotation of arc plate 1 (3) and arc plate 2 (114) to surround the pipe with the other arc plate 1 (3) and arc plate 2 (114); Step 2: Control the electric push rod (5) to move the cleaning block (7), and control the arc-shaped slider (4) to rotate the cleaning block (7), thereby realizing the automatic cleaning of the mud on the surface of the pipe; Step 3: Rotate the cleaning block (7) so that the camera (8) faces the pipe surface. Observe and inspect the pipe surface through the camera (8). During the inspection, squeeze the pipe with the electric roller (9) to expand the small cracks on the pipe surface so that the camera (8) can observe and inspect them. Step 4: The electric roller (9) and the top block (117) are used to hold the fixed pipe together, and then the electric push rod (111) is extended to stretch the pipe. The electric roller (9) and the top block (117) are also controlled to move and press the pipe to test the physical properties of the pipe after use, so as to further evaluate the aging of the pipe and improve the accuracy of pipe aging detection.

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