Plastic pipe pressure detection equipment

Abstract

The invention relates to the technical field of pipe pressure detection, and discloses plastic pipe pressure detection equipment, which comprises an equipment barrel shell and an annular mounting frame, the equipment barrel shell and the annular mounting frame are arranged on a to-be-detected pipe in a sleeving manner, and the annular mounting frame is mounted at one end of the equipment barrel shell; according to the invention, three core functions of pressure loading, axial walking and deformation detection are integrated, so that continuous detection of the pressure bearing performance of the pipe can be realized, and the detection operation efficiency is improved; the walking mechanism and the pressing piece are arranged in a staggered manner, so that the interference of walking pressing force on a pressure detection reference is eliminated from the root of the structure, and the accuracy of detection data is guaranteed; the laser measurer has the capacity of circumferential circulating movement and axial displacement adjustment, deformation detection of different areas of the pipe can be flexibly covered, and the deformation condition of the pipe subjected to pressure bearing is completely reduced; through the structure that the threaded adjusting rods in an annular array are matched with the pressing pieces, circumferential multi-point loading of the pipes and stable positioning of the equipment can be achieved, and the basic detection requirements of the pipes with different pipe diameters are met.

Description

Technical Field

[0001] This invention relates to the field of pipe pressure testing technology, and specifically to a pressure testing device for plastic pipes. Background Technology

[0002] Plastic pipes, as an important component of chemical building materials, are widely accepted by users due to their superior performance, hygiene, environmental protection, and low consumption. Before use, the pressure resistance of plastic pipes needs to be tested to ensure that they can withstand a certain pressure and thus prevent malfunctions during use.

[0003] Existing technology discloses a pressure testing device for plastic pipes (application number CN202010450492.X), comprising a placement frame with a placement cavity, a rotating mechanism within the placement cavity, and a lifting mechanism within a working cavity. The lifting mechanism includes two vertical plates fixed to the upper surface of the rotating frame, with friction blocks movable up and down on the vertical plates. A clamping mechanism is provided within the working cavity, including a drive motor fixed to the lower inner wall of the working cavity. A motor shaft is rotatably mounted on the upper surface of the drive motor. This device can test the pressure resistance of plastic pipes. Furthermore, this device performs multiple tests on a small area of ​​the plastic pipe each time, ensuring that the entire section of the plastic pipe meets the required pressure resistance standard, rather than just the overall standard. This addresses situations where parts of the pipe still fail to meet the requirements in actual use, thus raising the bar for plastic pipes and facilitating subsequent work.

[0004] However, existing technologies, especially this particular solution, still have the following problems: The testing range is severely limited, making continuous full-length testing of long-distance pipes impossible. The existing equipment uses a cavity structure with a fixed placement frame, which can only test a fixed small section of the pipe. For pipes several meters long commonly used in municipal engineering and gas transmission, repeated manual disassembly, relocation, and adjustment of the testing position are required, which is cumbersome. Furthermore, it cannot achieve continuous and uniform point testing along the entire pipe axis, which easily creates blind spots and fails to fully cover the pressure-bearing performance of the entire pipe section, making it difficult to ensure the quality consistency of the entire long pipe section.

[0005] The loading and testing processes are not synchronized, resulting in insufficient accuracy and specificity of the test data. The pressure loading mechanism and deformation testing mechanism in this solution are designed separately, making it impossible to achieve a precise correspondence between pressure loading points and deformation testing points. This makes it difficult to capture direct deformation data of the core pressure-bearing area of ​​the pipe and to accurately locate the true pressure-bearing performance of circumferential weak points such as weld lines and uneven wall thickness. Furthermore, it cannot achieve synchronous real-time acquisition of loading force and deformation. For plastic pipes with viscoelastic properties, the deformation lag can easily lead to serious deviations in the "loading force-deformation" correspondence, resulting in distorted test data that cannot accurately reflect the pipe's pressure-bearing performance.

[0006] The structural design is prone to introducing interference during testing and can easily cause irreversible damage to the pipes. This scheme uses a clamping mechanism to fix the pipes and a rigid friction block for loading. The application of clamping and loading forces can easily cause pre-deformation of the pipes, altering the initial testing benchmark and directly affecting the reliability of the test results. Simultaneously, the rigid loading block is in line contact with the outer wall of the pipe, resulting in severe stress concentration and potentially causing premature crushing at the loading point, making it impossible to measure the pipe's true ultimate pressure resistance. Furthermore, the rigid contact can easily scratch the outer wall of the pipe, leading to the scrapping of finished pipes and additional testing costs.

[0007] The circumferential testing coverage is incomplete, failing to fully reconstruct the pressure-bearing performance of the pipe throughout its entire circumference. The loading and testing mechanism of this solution can only operate on fixed circumferential positions of the pipe, unable to achieve multi-point cyclic loading and deformation testing across the entire 360-degree circumference. It cannot identify differences in pressure-bearing performance at different locations along the circumference of the pipe. Quality issues arising during pipe production, such as circumferential welding defects, uneven wall thickness, and localized impurities, are easily missed, making it impossible to comprehensively assess the true pressure-bearing safety factor of the pipe.

[0008] The equipment suffers from poor versatility and extremely low automation and testing efficiency. Its cavity-type fixing structure cannot quickly adapt to pipes of different outer diameters, requiring replacement of clamping and loading components for different pipe diameters, resulting in poor equipment versatility. Furthermore, the pipe displacement, pressure loading, and deformation detection operations cannot be automated in a coordinated manner; the testing of a single long pipe requires multiple manual interventions, making the process cumbersome, time-consuming, and unsuitable for the efficient testing needs of large batches of pipes. Summary of the Invention

[0009] The purpose of this invention is to provide a technical solution to address the problems in the prior art mentioned in the background section.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: A pressure testing device for plastic pipes includes: a device shell and an annular mounting bracket, both of which are sleeved on the pipe to be tested, and the annular mounting bracket is installed at one end of the device shell. The annular mounting bracket has multiple sets of threaded adjusting rods arranged in a ring array. One end of each threaded adjusting rod extends into the interior of the annular mounting bracket, and the end of each threaded adjusting rod is connected to a pressing component, which supports and presses down on the surface of the pipe to be tested. The device shell is equipped with a traveling mechanism installed inside through a telescopic component. The traveling mechanism can be driven to move along the outer surface of the pipe to be tested. The traveling mechanism and the pressure-lowering component are staggered to avoid the downward pressure of the traveling mechanism affecting the pressure detection. The annular mounting bracket is equipped with a movable support that can be driven to move in an annular manner. A laser measuring device is installed on the movable support. The laser measuring device is used to detect the degree of deformation of the pipe. The laser measuring device can move along the axial direction of the pipe to be tested.

[0011] Preferably, a laser measuring device is mounted on the movable support via an axial moving track, and the laser measuring device can move via the axial moving track to change the detection position.

[0012] Preferably, when the pressure testing component applies downward pressure to the pipeline under test, the laser measuring device performs a single or multiple tests near the pressure point of the pipeline under test; when performing a single test, the laser measuring device is aligned with multiple pressure testing components.

[0013] Preferably, the movable bracket drives the laser measuring device to rotate along the annular mounting frame, thereby performing multiple inspections along the pipe to be inspected. The end face of the annular mounting frame is equipped with an annular track for the movable bracket to slide.

[0014] Preferably, the outer ring of the annular mounting bracket is provided with a second gear, the movable bracket is equipped with a first driver, and the output shaft of the first driver is equipped with a first gear that meshes with the second gear.

[0015] Preferably, the walking mechanism includes a walking wheel and a walking track, the walking track is sleeved on the walking wheel, the walking wheel is mounted on a mounting base plate, the mounting base plate is mounted on the telescopic end of the telescopic member, and a second driver for driving the walking track is mounted on the mounting base plate.

[0016] Preferably, the traveling wheels are deformable flexible traveling wheels. With the adjustment of the telescopic component, the traveling wheels and the traveling track are attached to the surface of the pipe to be tested, and the traveling wheels and the traveling track generate uniform downward pressure on the pipe to be tested.

[0017] Preferably, the pressing component is configured with an arc-shaped structure, and a pressure sensor is provided on the side of the pressing component close to the pipe to be tested.

[0018] Preferably, a driver three is installed on the outside of the annular mounting bracket, and the driver three drives the threaded adjusting rod to rotate, thereby realizing the extension and retraction adjustment of the threaded adjusting rod.

[0019] Preferably, the telescopic component is configured as a step-adjustable telescopic component, so that the walking mechanism can be adapted to pipes of different diameters to be tested.

[0020] Technical effects and advantages of the present invention: The pressure testing device for plastic pipes proposed in this invention has the following advantages compared with the prior art: This invention uses a coaxially mounted equipment shell and an annular mounting frame as the main support. A ring-shaped array of threaded adjusting rods drives the pressure-reducing component radially forward, applying testing pressure to the pipe and positioning the equipment. A telescopic component adjusts the radial position of the traveling mechanism, allowing it to conform to the outer wall of the pipe and drive the equipment axially. The traveling mechanism and the pressure-reducing component are staggered to avoid interference from the downward pressure during travel. A movable support that moves circumferentially along the annular mounting frame drives a laser measuring device to adjust the circumferential testing points. Combined with the axial movement capability of the laser measuring device, this enables full-range testing of the pipe's pressure-bearing deformation.

[0021] This integrated system combines three core functions: pressure loading, axial movement, and deformation detection. It enables continuous testing of pipe pressure resistance, improving testing efficiency. The staggered layout of the walking mechanism and the pressure-lowering component eliminates interference from the downward pressure during movement on the pressure testing benchmark, ensuring the accuracy of the test data. The laser measuring instrument has both circumferential cyclic movement and axial displacement adjustment capabilities, allowing for flexible coverage of deformation testing in different areas of the pipe and fully restoring the deformation of the pipe under pressure. The ring array of threaded adjustment rods, combined with the structure of the pressure-lowering component, enables multi-point circumferential loading of the pipe and stable positioning of the equipment, adapting to the basic testing needs of pipes with different diameters. Attached Figure Description

[0022] Figure 1 This is one of the three-dimensional structural schematic diagrams of the pressure testing device for plastic pipes of the present invention; Figure 2 This is a second three-dimensional structural schematic diagram of the pressure testing device for plastic pipes according to the present invention; Figure 3 This is a front structural diagram of the pressure testing device for plastic pipes of the present invention; Figure 4 This is a schematic diagram of one side of the pressure testing device for plastic pipes according to the present invention; Figure 5 This is a schematic diagram of another side of the pressure testing device for plastic pipes according to the present invention; Figure 6 This is a schematic diagram of the walking wheels and walking tracks in an embodiment of the present invention.

[0023] In the picture: 11. Equipment shell; 12. Annular mounting bracket; 13. Moving support; 14. Driver 1; 15. Laser measuring instrument; 16. Pressing component; 17. Threaded adjusting rod; 18. Traveling wheel; 19. Telescopic component; 110. Driver 2; 111. Gear 1; 112. Gear 2; 113. Driver 3; 114. Traveling track; 115. Mounting base plate; 116. Axial movement track. Detailed Implementation

[0024] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0025] The invention provides, for example Figures 1 to 6 As shown, a pressure testing device for plastic pipes includes: The equipment shell 11 and the annular mounting bracket 12 are both fitted onto the pipe to be tested, and the annular mounting bracket 12 is installed at one end of the equipment shell 11; The annular mounting bracket 12 is threaded with multiple sets of threaded adjusting rods 17 arranged in an annular array. One end of the threaded adjusting rod 17 extends into the interior of the annular mounting bracket 12, and the end of the threaded adjusting rod 17 is connected to a pressing member 16, which supports and presses down on the surface of the pipe to be tested. The device shell 11 is equipped with a traveling mechanism installed inside through the telescopic component 19. The traveling mechanism can be driven to move along the outer surface of the pipe to be tested. The traveling mechanism and the pressure component 16 are staggered to avoid the downward pressure of the traveling mechanism affecting the pressure detection. The annular mounting bracket 12 is equipped with a movable support 13 that can be driven to move in an annular manner. A laser measuring device 15 is provided on the movable support 13. The laser measuring device 15 is used to detect the degree of deformation of the pipe. The laser measuring device 15 can move along the axial direction of the pipe to be tested.

[0026] The overall core architecture of the plastic pipe pressure testing equipment was established, integrating the three core functional modules of pipe positioning and loading, axial movement, and circumferential deformation detection. By adopting a staggered layout design between the walking mechanism and the pressure-reducing component 16, the interference of the downward pressure of the walking mechanism on the benchmark of pipe pressure testing is avoided from the root. At the same time, with the laser detection structure that can move circumferentially and adjust flexibly in the axial direction, multi-dimensional and full-range detection of pipe pressure deformation can be realized, providing a complete equipment foundation for the accurate evaluation of pipe pressure performance.

[0027] Working principle: This equipment uses a cylindrical shell 11 and annular mounting frame 12, coaxially sleeved on the outside of the pipe to be tested, as the main load-bearing body. The threaded adjusting rods 17 distributed in annular array drive the pressure member 16 to feed radially, applying testing pressure to the pipe to be tested and completing the equipment positioning. The radial position of the traveling mechanism is adjusted by the telescopic member 19, so that the traveling mechanism fits against the outer wall of the pipe and drives the equipment to move axially. The traveling mechanism and the pressure member 16 are staggered to avoid interference from the downward pressure of the traveling mechanism on the test. The moving bracket 13, which can move circumferentially along the annular mounting frame 12, drives the laser measuring device 15 to adjust the circumferential test point. With the axial movement capability of the laser measuring device 15 itself, the full range of pipe pressure deformation testing can be achieved.

[0028] The integrated system combines three core functions: pressure loading, axial movement, and deformation detection. This enables continuous testing of the pipe's pressure-bearing performance, improving testing efficiency. The staggered layout of the walking mechanism and the pressure-lowering component 16 eliminates interference from the downward pressure during movement on the pressure testing benchmark, ensuring the accuracy of the test data. The laser measuring instrument 15 has both circumferential cyclic movement and axial displacement adjustment capabilities, allowing for flexible coverage of deformation testing in different areas of the pipe and fully restoring the deformation of the pipe under pressure. The ring-array threaded adjustment rod 17, combined with the structure of the pressure-lowering component 16, enables multi-point circumferential loading of the pipe and stable positioning of the equipment, adapting to the basic testing needs of pipes with different diameters.

[0029] The purpose of adding an axial moving track 116 to the movable support 13 to mount the laser measuring device 15 is to overcome the limitation of a fixed laser detection position. Without moving the entire device, the axial detection position of the laser measuring device 15 can be quickly changed by adjusting the track, flexibly covering the deformation detection needs of different axial regions of the pipe, and significantly improving the convenience of the detection operation and the coverage of the detection range. The laser measuring device 15 is mounted on the movable support 13 via the axial moving track 116, and the laser measuring device 15 can be moved via the axial moving track 116 to change its detection position.

[0030] Regarding the optimization of the deformation data acquisition logic for pipe pressure testing, during the process of the pressure-applying component 16 applying testing pressure to the pipe, the laser measuring device 15 can perform single or multiple deformation tests on the area near the pressure point. In single-test mode, the laser measuring device 15 is aligned with the pressure-applying component 16 to accurately capture the direct deformation data of the core pressure area of ​​the pipe. In multi-segment testing mode, the entire pressure-affected area can be covered, comprehensively reconstructing the deformation distribution of the pipe after pressure testing. When the pressure-applying component 16 applies downward pressure to the pipe under test, the laser measuring device 15 performs single or multiple tests near the pressure point of the pipe under test. During single-test, the laser measuring device 15 is aligned with multiple sets of pressure-applying components 16.

[0031] To provide circumferential guidance for the movable support 13 via the annular track, the laser measuring device 15 can be driven to rotate a full circumference along the annular mounting frame 12. This enables continuous multi-point detection of the pipe under test, accurately identifying deformation differences at different circumferential locations, effectively capturing the pressure-bearing performance of weak areas such as weld lines and uneven wall thickness, and completely restoring the pressure-bearing performance distribution of the entire circumference of the pipe. The movable support 13 drives the laser measuring device 15 to rotate along the annular mounting frame 12, thereby performing multiple tests along the pipe under test. The annular mounting frame 12 has an annular track installed on its end face for the movable support 13 to slide.

[0032] Regarding the use of gear meshing to provide power for the circumferential movement of the movable support 13, a second gear 112 is installed on the outer ring of the annular mounting frame 12, which, together with the gear 111 driven by the driver 14 on the movable support 13, forms a stable transmission engagement. This ensures the smoothness and positioning accuracy of the circumferential rotation of the movable support 13, avoids slippage and offset during transmission, and ensures accurate positioning and uniform data acquisition intervals during circumferential detection by the laser measuring device 15. The outer ring of the annular mounting frame 12 is equipped with a second gear 112, the movable support 13 is equipped with a driver 14, and the output shaft of the driver 14 is equipped with a gear 111 that meshes with the second gear 112.

[0033] To optimize the structure of the walking mechanism, a tracked walking structure is adopted instead of the traditional single-wheel walking structure. The walking track 114 is fitted onto the outside of the walking wheel 18. The walking wheel 18, drive component, and telescopic component 19 are integrated and installed through the mounting base plate 115. The tracked structure can significantly increase the contact area with the arc-shaped outer wall of the pipe, significantly improving the grip and stability during walking, avoiding slippage and deviation on the pipe surface, and ensuring the smoothness of the equipment's axial movement. The walking mechanism includes the walking wheel 18 and the walking track 114. The walking track 114 is fitted onto the walking wheel 18, and the walking wheel 18 is mounted on the mounting base plate 115. The mounting base plate 115 is mounted on the telescopic end of the telescopic component 19, and a driver 110 for driving the walking track 114 is installed on the mounting base plate 115.

[0034] By configuring the traveling wheel 18 as a deformable flexible structure, and coordinating with the feed adjustment of the telescopic component 19, the traveling wheel 18 and the traveling track 114 can be tightly fitted onto the surface of the pipe to be tested. The flexible structure can adapt to the surface curvature and slight roundness errors of the pipe, ensuring a uniform distribution of the downward pressure applied to the pipe surface by the traveling mechanism. This avoids scratching the outer wall of the pipe by the rigid wheel and also prevents local stress concentration from causing additional deformation that interferes with the testing benchmark. The traveling wheel 18 is configured as a deformable flexible traveling wheel. Under the adjustment of the telescopic component 19, the traveling wheel 18 and the traveling track 114 are fitted onto the surface of the pipe to be tested, and the traveling wheel 18 and the traveling track 114 exert uniform downward pressure on the pipe under test.

[0035] To achieve the goal of configuring the pressure-reducing component 16 as an arc-shaped structure adapted to the outer wall of the pipe, and integrating a pressure sensor on the side of the pressure-reducing component 16 in contact with the pipe, the arc-shaped structure can change the traditional line contact loading to surface contact loading, significantly dispersing the loading stress and preventing premature local crushing at the pressure point of the pipe. The pressure sensor can collect pressure values ​​in real time during the loading process, enabling accurate monitoring and traceability of the detected pressure. The pressure-reducing component 16 is configured as an arc-shaped structure, with a pressure sensor located on the side of the pressure-reducing component 16 closest to the pipe being tested.

[0036] The method of automatically adjusting the threaded adjusting rod 17 by adding a driver 3 113 to the outside of the annular mounting bracket 12 to drive the rotation of the threaded adjusting rod 17 replaces the traditional manual tightening method. This allows for precise control of the feed amount and loading force of the threaded adjusting rod 17 and enables synchronous adjustment of multiple sets of threaded adjusting rods 17. This ensures the uniformity of circumferential loading on the pipe and significantly improves the efficiency and automation of the inspection operation. The driver 3 113 is installed on the outside of the annular mounting bracket 12, and the driver 3 113 drives the threaded adjusting rod 17 to rotate, thereby realizing the extension and retraction adjustment of the threaded adjusting rod 17.

[0037] To configure the telescopic component 19 as a step-adjustable structure, the radial extension and retraction of the traveling mechanism can be precisely controlled, allowing the traveling mechanism to stably adapt to pipes of different outer diameters. Regardless of changes in pipe diameter, reliable contact between the traveling mechanism and the outer wall of the pipe is guaranteed, effectively expanding the applicable pipe diameter range of the equipment and improving its versatility. The step-adjustable telescopic component 19 enables the traveling mechanism to be adapted to pipes of different diameters.

[0038] In summary, the present invention also has the following combined effects: This pressure testing equipment for plastic pipes uses a cylindrical shell 11 and an annular mounting frame 12, coaxially sleeved on the outside of the pipe to be tested, as its basic carrier. It integrates three core functions: pipe pressure loading, axial movement, and full-dimensional deformation detection. Its core working logic is as follows: Pipe diameter adaptation and positioning: For pipes with different outer diameters to be tested, the radial position of the traveling mechanism is adjusted by the step-adjustable telescopic component 19, and the radial telescopic adjustment of the threaded adjusting rod 17 is combined to make the equipment stably adapt to pipes of different specifications; at the same time, the feed adjustment of the telescopic component 19 makes the flexible traveling wheel 18 of the traveling mechanism and the traveling track 114 fit tightly against the outer wall of the pipe, providing support for the axial movement of the equipment. Moreover, the traveling mechanism and the pressure component 16 adopt a staggered layout to avoid the interference of the downward pressure of the traveling mechanism on the pressure detection benchmark from a structural point of view.

[0039] Pressure loading and control: The threaded adjusting rod 17 drives the arc-shaped lowering member 16 at the end to apply radial detection pressure to the outer wall of the pipe, realizing surface contact loading. The pressure sensor matched with the lowering member 16 can collect the loading pressure value in real time. The threaded adjusting rod 17 can be driven to rotate through the driver 113 outside the ring mounting bracket 12 to realize automatic telescopic adjustment, accurately control the loading force, and can also complete the synchronous adjustment of multiple sets of threaded adjusting rods 17 to ensure the uniformity of circumferential loading of the pipe.

[0040] Axial travel drive: The drive driver 110 on the mounting base plate 115 drives the traveling wheels 18 and the traveling tracks 114 to rotate, driving the entire equipment to move smoothly along the pipe axis; the tracked structure increases the contact area with the outer wall of the pipe, avoiding slippage and deviation during travel; the flexible traveling wheels 18 can adapt to the curvature and slight roundness error of the pipe surface, so that the downward pressure is evenly distributed, avoiding scratching the pipe or causing additional deformation to interfere with the detection.

[0041] Full-dimensional deformation detection: The driver 14 on the movable support 13 drives the gear 111 to rotate, which meshes with the gear 112 on the outer ring of the annular mounting bracket 12, driving the movable support 13 to rotate circumferentially along the annular track on the end face of the annular mounting bracket 12. This drives the laser measuring device 15 to adjust the circumferential detection position of the pipe. At the same time, the laser measuring device 15 can adjust the axial detection position through the axial moving track 116 on the movable support 13, realizing the acquisition of deformation data of the pipe in the axial and circumferential directions. During the detection process, when the pressure is applied by the pressure member 16, the laser measuring device 15 can be controlled to perform single or multiple detections near the pressure position. During a single detection, the laser measuring device 15 is aligned with the pressure member 16 to accurately capture the deformation data of the pressure core area. During circumferential rotation, continuous multi-point detection of the entire circumference of the pipe can be completed to identify the differences in circumferential deformation of the pipe and the pressure-bearing performance of weak areas.

[0042] Improving the accuracy and reliability of test data: The staggered layout of the walking mechanism and the pressure member 16 eliminates the interference of the walking mechanism's downward pressure on the test benchmark from the root; the surface contact loading method of the arc-shaped pressure member 16 disperses the loading stress, preventing premature crushing of the pipe at the pressure point, and, together with the pressure sensor, enables real-time accurate monitoring and traceability of the loading pressure; the laser measuring instrument 15 can be aligned with the pressure member 16 for detection, accurately capturing the deformation data of the core pressure area, and the circumferential full-range detection can completely restore the pressure-bearing performance distribution of the entire circumference of the pipe, effectively identifying the pressure-bearing performance of weak areas such as weld lines and uneven wall thickness.

[0043] The automation level and ease of operation of the equipment are improved: the automatic extension and retraction adjustment of the threaded adjustment rod 17 is realized through the driver 3 113, replacing the traditional manual adjustment method. It can accurately control the feed amount and loading force, and can also realize multiple sets of synchronous adjustment, which not only ensures the uniformity of circumferential loading, but also greatly improves the detection efficiency; the laser measuring device 15 can quickly adjust the detection position through the axial moving track 116 without moving the entire equipment, thus improving the ease of operation; the circumferential transmission method of gear meshing ensures the smoothness and positioning accuracy of the rotation of the moving bracket 13, avoids transmission slippage and offset, and ensures accurate laser detection points and uniform data acquisition intervals.

[0044] Enhancing the operational stability and versatility of the equipment: The tracked walking structure increases the contact area with the curved outer wall of the pipe, significantly improving the gripping force and stability of axial movement and preventing slippage and deviation; the flexible walking wheels 18 can adapt to the curvature and roundness errors of the pipe surface, so that the downward pressure of the walking mechanism is evenly distributed, which not only avoids the rigid wheels from scratching the outer wall of the pipe, but also prevents local stress concentration from causing additional deformation interference to the detection; the step-adjustable telescopic component 19, together with the radially telescopic threaded adjusting rod 17, enables the equipment to stably adapt to pipes of different outer diameter specifications, effectively expanding the scope of application and improving the versatility of the equipment.

[0045] It achieves full-range coverage and flexible adaptation of deformation detection: the laser measuring device 15 can adjust its axial position through the axial moving track 116, and with the circumferential rotation of the moving bracket 13, it realizes the full-range axial and circumferential deformation detection of the pipe; it can flexibly select single or multiple detection modes according to the detection needs, which can not only accurately capture the deformation data of the core pressure area, but also fully cover the pressure-affected range, completely restore the deformation distribution of the pipe after pressure, and adapt to different detection scenario requirements.

[0046] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A pressure testing device for plastic pipes, characterized in that, include: The equipment shell (11) and the annular mounting bracket (12) are both fitted onto the pipe to be tested, and the annular mounting bracket (12) is installed at one end of the equipment shell (11); The annular mounting bracket (12) is threaded with multiple sets of threaded adjusting rods (17) arranged in an annular array. One end of the threaded adjusting rod (17) extends into the interior of the annular mounting bracket (12), and the end of the threaded adjusting rod (17) is connected to a pressing member (16). The pressing member (16) supports and presses down on the surface of the pipe to be tested. The device shell (11) is equipped with a walking mechanism inside through a telescopic component (19). The walking mechanism can be driven to move along the outer surface of the pipe to be tested. The walking mechanism and the pressure component (16) are staggered to avoid the downward pressure of the walking mechanism affecting the pressure detection. The end face of the annular mounting bracket (12) is equipped with a movable support (13) that can be driven to move in an annular manner. A laser measuring device (15) is provided on the movable support (13). The laser measuring device (15) is used to detect the degree of deformation of the pipe. The laser measuring device (15) can move along the axial direction of the pipe to be tested.

2. The pressure testing device for plastic pipes according to claim 1, characterized in that, A laser measuring device (15) is mounted on the movable support (13) via an axial moving track (116). The laser measuring device (15) can move via the axial moving track (116) to change the detection position.

3. The pressure testing device for plastic pipes according to claim 2, characterized in that, When the pressure testing component (16) generates downward pressure on the pipeline under test, the laser measuring instrument (15) performs a single test or multiple tests near the pressure position of the pipeline under test; when performing a single test, the laser measuring instrument (15) is aligned with multiple pressure testing components (16).

4. The pressure testing device for plastic pipes according to claim 3, characterized in that, The movable bracket (13) drives the laser measuring device (15) to rotate along the annular mounting frame (12), thereby performing multiple tests along the pipe to be tested. The end face of the annular mounting frame (12) is equipped with an annular track for the movable bracket (13) to slide.

5. The pressure testing device for plastic pipes according to claim 4, characterized in that, The outer ring of the ring mounting bracket (12) is provided with gear two (112), and the movable bracket (13) is equipped with driver one (14). The output shaft of driver one (14) is equipped with gear one (111) that cooperates with gear two (112).

6. The pressure testing device for plastic pipes according to claim 1, characterized in that, The walking mechanism includes a walking wheel (18) and a walking track (114). The walking track (114) is fitted on the walking wheel (18). The walking wheel (18) is mounted on the mounting base plate (115). The mounting base plate (115) is mounted on the telescopic end of the telescopic member (19). The mounting base plate (115) is equipped with a second driver (110) for driving the walking track (114).

7. The pressure testing device for plastic pipes according to claim 6, characterized in that, The walking wheel (18) is configured as a deformable flexible walking wheel. Under the adjustment of the telescopic component (19), the walking wheel (18) and the walking track (114) are attached to the surface of the pipe to be tested, and the walking wheel (18) and the walking track (114) generate uniform downward pressure on the pipe to be tested.

8. The pressure testing device for plastic pipes according to claim 1, characterized in that, The pressure member (16) is configured as an arc-shaped structure, and a pressure sensor is provided on the side of the pressure member (16) close to the pipe to be tested.

9. The pressure testing device for plastic pipes according to claim 8, characterized in that, The annular mounting bracket (12) is externally mounted with a driver three (113), which drives the threaded adjusting rod (17) to rotate, thereby realizing the extension and retraction adjustment of the threaded adjusting rod (17).

10. A pressure testing device for plastic pipes according to claim 9, characterized in that, The telescopic component (19) is configured as a step-adjustable telescopic component, so that the walking mechanism can be adapted to pipes of different diameters to be tested.

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