Laser-based pipe wall thickness detector

Abstract

The invention relates to the technical field of pipeline detection, and discloses a laser-based pipe wall thickness detector, which comprises a detection table, the upper side of the detection table is fixedly provided with a portal, and the upper side of the detection table is slidably connected with a first base and a second base which are slidably connected with the lower sides of the two ends of a pipeline body. A second lead screw penetrating through the two ends of the pipeline body is rotationally connected between the second base and the side wall of the portal frame, a second laser range finder is fixed to the outer wall of the sliding barrel, a first lead screw located above the pipeline body is rotationally connected between the two side walls of the portal frame, and a first laser range finder is fixedly arranged at the output end of the first lead screw. The first laser range finder and the second laser range finder move at the same speed in the same direction to measure the pipeline body, and then the bending condition of the pipeline body and the pipe wall thickness data of the pipeline body can be judged; therefore, the problems that in the prior art, when the thickness of the pipe wall is measured, manual work needs to be relied on, and then efficiency is low are solved.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, specifically to a laser-based pipe wall thickness detector. Background Technology

[0002] Pipelines, as core components for fluid transportation and industrial transmission, are widely used in oil and gas, municipal, and chemical industries. The thickness of the pipe wall directly determines its load-bearing capacity, corrosion resistance, and service life. Accurate detection of pipe wall thickness is crucial for production safety and facility stability during mass production quality inspection and in-service inspection, especially for precision pipes and high-pressure pipelines, which have extremely high requirements for testing accuracy, efficiency, and adaptability.

[0003] Currently, ultrasonic waves are commonly used to measure pipe wall thickness. However, ultrasonic thickness measurement requires the application of a coupling agent, which limits its applicability to various scenarios and greatly affects its accuracy due to the material. Furthermore, it relies on manual labor and can only test one point at a time, resulting in low efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a laser-based pipe wall thickness detector, which solves the problem of low efficiency caused by the need for manual measurement of pipe wall thickness in existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser-based pipe wall thickness detector, comprising a detection platform, a gantry fixed to the upper side of the detection platform, a pipe body disposed above the detection platform, a base one and a base two slidably connected to the upper side of the detection platform and slidably connected to the lower sides of both ends of the pipe body, a lead screw two passing through both ends of the pipe body being rotatably connected between the base two and the side wall of the gantry, a slide cylinder being fixedly disposed at the output end of the lead screw two, a laser rangefinder two being fixedly disposed on the outer wall of the slide cylinder, a lead screw one located above the pipe body being rotatably connected between the two side walls of the gantry, a laser rangefinder one being fixedly disposed at the output end of the lead screw one, the vertical projections of the laser rangefinder two and the laser rangefinder one coinciding, and a drive assembly for synchronously driving the lead screw one and the lead screw two being disposed on the outer wall of the gantry.

[0006] The above technical solution involves laser rangefinder one and laser rangefinder two moving at the same speed and in the same direction. This allows for the determination of the distance between laser rangefinder one and the outer wall of the top of the pipe body, and the distance between laser rangefinder two and the inner top wall of the pipe body. Linear data is generated, which in turn allows for the determination of the pipe body's curvature and wall thickness, thereby improving the efficiency of pipe wall thickness measurement.

[0007] Preferably, an upper support rod is fixed between the two side walls of the gantry, and a slide block two is slidably connected to the outer wall of the upper support rod. The lower side of the slide block two is fixed to the upper side of the output end of the lead screw two. One end of the lead screw two is rotatably connected to the outer wall of the gantry, and the other end of the lead screw two is rotatably connected to a fixed seat. A lower support rod is fixed between the fixed seat and the side wall of the gantry, and the upper outer wall of the lower support rod is slidably connected to the lower side of the output end of the lead screw two. The outer wall of the base two is provided with a groove one that slides in cooperation with the fixed seat.

[0008] Preferably, a base three is slidably connected to the upper side of the testing platform, a roller two is rotatably connected to the upper side of the base three, and the lower support rod is slidably connected to the outer wall of the roller two. Both the base two and the base one pass through the gantry.

[0009] Preferably, a roller is attached to the upper side of the pipe body near the base two, and a motor two is slidably connected to the inner wall of the gantry, with the output end of the motor two fixedly disposed on the outer wall of the roller.

[0010] Preferably, a limiting plate is fixed on the side of the base two away from the pipe body, and a sliding groove two is opened on the outer wall of the gantry to cooperate with the sliding of the limiting plate. The inner top wall of the limiting plate is attached to the upper side of the motor two.

[0011] Preferably, a second spring is fixed between the lower side of the second motor and the inner wall of the gantry, and a groove for accommodating the second spring is provided on the inner wall of the gantry.

[0012] Preferably, a slide rod is slidably connected to the inner wall of the slide cylinder, a spring is fixed between the lower side of the slide rod and the inner wall of the slide cylinder, a cleaning block is fixedly provided at the top of the slide rod, and the upper side of the cleaning block slides against the inner top wall of the pipe body.

[0013] Preferably, rollers are rotatably connected to the upper sides of both base one and base two, and the outer walls of both ends of the pipe body are in contact with and roll against the outer walls of rollers.

[0014] Preferably, the outer wall of the gantry is provided with a drive assembly, the drive assembly including a mounting bracket fixed to the outer wall of the gantry, a motor is fixed to the outer wall of the mounting bracket, a transmission belt is fixed to the output end of the motor, the outer wall of the transmission belt is fixed to one end of a lead screw, a synchronous belt is fixed to the outer wall of one end of the lead screw, and the other end of the synchronous belt is fixed to the outer wall of the lead screw.

[0015] Preferably, a control cabinet is provided on one side of the testing platform, and the control cabinet is electrically connected to motor one, motor two, laser rangefinder one, and laser rangefinder two.

[0016] Working principle: During measurement, the drive component drives the synchronous drive of lead screw one and lead screw two, so that laser rangefinder one and laser rangefinder two move at the same speed and in the same direction. This allows laser rangefinder one to measure the distance between itself and the outer wall of the top of the pipe body, and laser rangefinder two to measure the distance between itself and the top wall of the pipe body, generating linear data. This allows us to determine the bending condition of the pipe body and the pipe wall thickness. Then, by rotating the pipe body and base one and base two, the pipe body is rotated to the unmeasured arc surface. By repeating the above steps, the bending data and pipe wall thickness data of the entire pipe body can be obtained. This solves the problem of low efficiency in the prior art when measuring the pipe wall thickness, which requires manual labor.

[0017] This invention provides a laser-based pipe wall thickness detector. It offers the following advantages: 1. This invention drives the synchronous drive of lead screw one and lead screw two through the drive component, so that laser rangefinder one and laser rangefinder two move at the same speed and in the same direction to measure the pipe body and generate linear data. This allows the bending condition of the pipe body and the pipe wall thickness data to be determined, thus solving the problem of low efficiency in the prior art when measuring the pipe wall thickness, which requires manual labor.

[0018] 2. The present invention enables the pipe body to be moved out of the measurement area by setting base one and base two through the gantry. With the cooperation of base three, the pipe body can be quickly replaced for measurement. Through the cooperation of fixed seat and slide groove one, and the sliding contact of limit plate and motor two, the pipe body can be driven to rotate while avoiding friction between the pipe body and rollers during horizontal movement.

[0019] 3. This invention achieves the function of cleaning different pipe inner diameters during measurement by sliding the sliding connection of the sliding rod and the sliding of the sliding cylinder, through the cooperation of the spring, and through the sliding contact between the upper side of the cleaning block and the inner top wall of the pipe body. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the slide tube of the present invention; Figure 3 This is a three-dimensional schematic diagram of lead screw one and lead screw two of the present invention; Figure 4 for Figure 1 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the detection stage of the present invention; Figure 6This is a three-dimensional structural diagram of the upper side of the base of the present invention; Figure 7 This is a partial cross-sectional structural diagram of the gantry of the present invention.

[0021] The components are as follows: 1. Inspection platform; 2. Gantry; 3. Pipe body; 4. Lead screw one; 5. Laser rangefinder one; 6. Slide rod; 7. Drive assembly; 70. Synchronous belt; 71. Transmission belt; 72. Motor one; 73. Mounting bracket; 8. Slide cylinder; 9. Base one; 10. Base two; 11. Lead screw two; 12. Laser rangefinder two; 13. Cleaning block; 14. Spring one; 15. Slide two; 16. Lower support rod; 17. Upper support rod; 18. Control cabinet; 19. Base three; 20. Fixed seat; 21. Roller one; 22. Slide groove one; 23. Limiting plate; 24. Roller; 25. Roller two; 26. Motor two; 27. Spring two; 28. Slide groove two. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 - Appendix Figure 3 This invention provides a laser-based pipe wall thickness detector, including a detection platform 1, a gantry 2 fixed on the upper side of the detection platform 1, a pipe body 3 disposed above the detection platform 1, a base 9 and a base 10 slidably connected to the upper side of the detection platform 1 and slidably connected to the lower sides of both ends of the pipe body 3, a lead screw 11 passing through both ends of the pipe body 3 rotatably connected between the base 10 and the side wall of the gantry 2, a slide cylinder 8 fixedly disposed at the output end of the lead screw 11, a laser rangefinder 12 fixedly disposed on the outer wall of the slide cylinder 8, a lead screw 4 located above the pipe body 3 rotatably connected between the two side walls of the gantry 2, a laser rangefinder 5 fixedly disposed at the output end of the lead screw 4, the vertical projections of the laser rangefinder 12 and the laser rangefinder 5 coincide, and a drive assembly 7 for synchronously driving the lead screw 4 and the lead screw 11 is disposed on the outer wall of the gantry 2.

[0024] In this embodiment, Figure 1The orientation is determined by the front, back, left, and right sides. Base 1 (9) and Base 2 (10) slide on the upper side of the detection platform 1 via a linear electric module. Specifically, during measurement, the drive assembly 7 drives the synchronous drive of lead screws 1 (4) and 2 (11), causing laser rangefinders 1 (5) and 2 (12) to move at the same speed and in the same direction. During this movement, laser rangefinder 1 (5) measures the distance between itself and the outer wall of the top of the pipe body 3, while laser rangefinder 2 (12) measures the distance between itself and the inner top wall of the pipe body 3, generating linear data that allows for a direct observation of linear fluctuations. This enables the determination of the bending condition of the pipe body 3, thus achieving the detection of the bending degree of the pipe body 3. In the above process, the distance between lead screw 14 and lead screw 21 is X, the distance between lead screw 14 and laser rangefinder 15 is Y, and the distance between laser rangefinder 212 and lead screw 21 is Z, all of which are fixed intervals. Thus, during the movement and measurement of laser rangefinder 15 and laser rangefinder 212, the distance between laser rangefinder 15 and the top outer wall of the pipe body 3 is measured as T, and the distance between laser rangefinder 212 and the inner top wall of the pipe body 3 is U. At this time, the linear data of the pipe wall thickness of the pipe body 3 can be obtained through XYZTU. By replacing laser rangefinder 15 and laser rangefinder 212 with a ranging matrix, the arc surface thickness data of the pipe body 3 can be obtained. After measuring a range of arc surfaces, the pipe body 3 is rotated to the unmeasured arc surface through the rotating connection between the pipe body 3 and base 9 and base 10. By repeating the above steps, the bending data and pipe wall thickness data of the entire pipe body 3 can be obtained. This solves the problem of low efficiency in the prior art when measuring the pipe wall thickness, which requires manual labor.

[0025] Please see the appendix Figure 3 and attached Figure 5 An upper support rod 17 is fixed between the two side walls of the gantry 2. A slide block 15 is slidably connected to the outer wall of the upper support rod 17. The lower side of the slide block 15 is fixed to the upper side of the output end of the lead screw 4. One end of the lead screw 11 is rotatably connected to the outer wall of the gantry 2. The other end of the lead screw 11 is rotatably connected to the fixed seat 20. A lower support rod 16 is fixed between the fixed seat 20 and the side wall of the gantry 2. The upper outer wall of the lower support rod 16 is slidably connected to the lower side of the output end of the lead screw 11. The outer wall of the base 2 10 is provided with a slide groove 22 that slides with the fixed seat 20.

[0026] Specifically, the output ends of lead screw 4 and lead screw 11 are linearly movable nut seats. With the upper support rod 17, when the output end of lead screw 4 drives the laser rangefinder 5 to slide left and right, it can be supported by the upper support rod 17, avoiding errors in measurement data caused by the deformation of lead screw 4. Similarly, the lower support rod 16 provides support for lead screw 11, further improving the accuracy of the data.

[0027] Based on the above embodiment, there is a problem of interference between the loading and unloading of the pipe body 3 and the lead screw 11. To solve the above problem, please refer to the appendix. Figure 1 Appendix Figure 5 and attached Figure 6 The upper side of the testing platform 1 is slidably connected to a base 3 19, and the upper side of the base 3 19 is rotatably connected to a roller 25. The lower support rod 16 is slidably connected to the outer wall of the roller 25. Both the base 2 10 and the base 1 9 pass through the gantry 2.

[0028] Specifically, when the pipe body 3 needs to be replaced, the right side of the gantry 2 supports the right end of the screw 11 and the lower support rod 16. Through the sliding connection between the base 19 and the testing platform 1, the upper side of the base 19 can provide support for the left end of the screw 11 and the lower support rod 16. As the bases 10 and 9 move to the left, the base 19 moves to the left, thus improving the stability of the screw 11 and the lower support rod 16. Then, the bases 10 and 9 pass through the left side of the gantry 2, driving the pipe... The pipe body 3 is moved out of the gate frame 2. At this time, the new pipe body 3 is placed on the upper side of the base 2 10 and the base 1 9, and the base 1 9 and the base 2 10 move the pipe body 3 back to the left and right side walls of the gate frame 2, so that the fixed seat 20 slides into the slide groove 1 22. At this time, the base 3 19 moves to the right side of the inspection table 1. At this time, the screw 2 11 and the lower support rod 16 form a support through the base 2 10 and the gate frame 2, thereby realizing the function of convenient loading and unloading of the pipe body 3.

[0029] Please see the appendix Figure 5 and attached Figure 7 A roller 24 is attached to the upper side of the pipe body 3 near the base 10 and rolls. A motor 26 is slidably connected to the inner wall of the gantry 2. The output end of the motor 26 is fixedly set on the outer wall of the roller 24.

[0030] Specifically, the output of motor 26 drives roller 24 to rotate. Through the contact between roller 24 and pipe body 3, pipe body 3 is rotated, thus realizing the function of rotating pipe body 3, which helps to improve the efficiency of measuring pipe body 3.

[0031] In the above embodiments, during the process of base 1 9 and base 2 10 moving the pipe body 3 between the left and right sides of the gantry 2, there is a problem of friction between the roller 24 and the pipe body 3. To solve the above problem, please refer to the appendix. Figure 5 and attached Figure 7 A limiting plate 23 is fixed on the side of the base 2 10 away from the pipe body 3. A sliding groove 28 is provided on the outer wall of the gantry 2 to cooperate with the sliding of the limiting plate 23. The inner top wall of the limiting plate 23 is attached to the upper side of the motor 26.

[0032] Specifically, motor 26 includes a housing and a motor fixed inside the housing. When the pipe body 3 moves to the right relative to base 1 9 and base 2 10, the outer wall of the pipe body 3 causes the roller 24 to move slightly upward, thereby driving motor 26 to slide slightly upward on the inner wall of the gantry 2, reducing friction between them. When the pipe body 3 is completely moved between the left and right sides of the gantry 2, base 2 10 will drive the limiting plate 23 to insert into the slide groove 28, so that the inner top wall of the limiting plate 23 is in contact with the upper side of motor 26. At this time, the lower side of the roller 24 is in close contact with the upper side of the pipe body 3, thereby realizing the function of the roller 24 driving the pipe body 3 to rotate, thereby reducing the friction between the roller 24 and the pipe body 3, which helps to improve the accuracy of measuring the pipe wall thickness of the pipe body 3.

[0033] Based on the above embodiment, during the leftward movement of the pipe body 3, friction still exists between its outer wall and the roller 24, causing errors in the measurement of the laser rangefinder 5. To solve the above problem, please refer to the appendix. Figure 5 and attached Figure 7 A spring 27 is fixed between the lower side of the motor 26 and the inner wall of the gantry 2, and a groove is provided on the inner wall of the gantry 2 to accommodate the spring 27.

[0034] Specifically, when the limiting plate 23 is not inserted into the slide groove 28, the motor 26 drives the roller 24 to move upward under the action of the spring 27. This creates a gap between the roller 24 and the pipe body 3 as the pipe body 3 moves to the right, thus solving the problem of friction between the outer wall of the pipe body 3 and the roller 24 as the pipe body 3 moves to the left, which would cause errors in the measurement of the laser rangefinder 5. When the limiting plate 23 is inserted into the slide groove 28, the inner top wall of the limiting plate 23 will press down on the motor 26, causing the lower side of the roller 24 to fit against the outer wall of the pipe body 3, thereby improving the applicability of the detector.

[0035] Based on the above embodiments, foreign matter or dust may adhere to the inner wall of the pipe body 3, affecting the measurement of the laser rangefinder 12. Please refer to the appendix. Figure 1 and attached Figure 2 A slide rod 6 is slidably connected to the inner wall of the slide cylinder 8. A spring 14 is fixed between the lower side of the slide rod 6 and the inner wall of the slide cylinder 8. A cleaning block 13 is fixedly installed on the top of the slide rod 6. The upper side of the cleaning block 13 slides against the inner top wall of the pipe body 3.

[0036] Specifically, the relative distance between the slide rod 6 and the slide cylinder 8 can be adjusted through the sliding connection of the slide rod 6 and the slide cylinder 8. With the cooperation of the spring 14 and the replacement of different rollers 24, it can be adapted to the measurement of different pipe inner diameters. During measurement, the upper side of the cleaning block 13 is attached to the inner top wall of the pipe body 3. Driven by the output end of the screw 11, the cleaning block 13 cleans the inner top wall of the pipe body 3 first, and then the laser rangefinder 12 performs the measurement, thereby further improving the detection accuracy of the detector.

[0037] Please see the appendix Figure 5 Both base 19 and base 20 are rotatably connected to roller 21, and the outer walls of both ends of the pipe body 3 are in contact with the outer walls of roller 21 and roll.

[0038] Specifically, the roller 24 drives the pipe body 3 and the roller 21 to roll relative to each other, thereby enabling the pipe body 3 to be rotated for measurement.

[0039] Please see the appendix Figure 1 and attached Figure 4 The outer wall of the gantry 2 is provided with a drive assembly 7. The drive assembly 7 includes a mounting bracket 73 fixed to the outer wall of the gantry 2. A motor 72 is fixed to the outer wall of the mounting bracket 73. A transmission belt 71 is fixed to the output end of the motor 72. One end of the lead screw 11 is fixed to the outer wall of the transmission belt 71. A timing belt 70 is fixed to the outer wall of one end of the lead screw 11. The other end of the timing belt 70 is fixed to the outer wall of the lead screw 4.

[0040] Specifically, the output of motor 72 drives the transmission belt 71 to rotate, providing power to lead screw 11. The synchronous belt 70 ensures that lead screw 11 and lead screw 4 can be driven synchronously at the same speed, thereby ensuring that laser rangefinder 5 and laser rangefinder 12 move synchronously at the same speed. This allows for the measurement of the same position on the pipe body 3 to determine the pipe wall thickness, thus improving the detection accuracy of the detector.

[0041] Please see the appendix Figure 4 Appendix Figure 5 and attached Figure 7 A control cabinet 18 is installed on one side of the testing platform 1. The control cabinet 18 is electrically connected to motor 1 72, motor 2 26, laser rangefinder 1 5, and laser rangefinder 2 12.

[0042] Specifically, the control cabinet 18 can use a PLC programmable controller, a microcontroller, a microprocessor, etc. The linear modules of the control cabinet 18 and the drive bases 19, 20, and 319 are all electrically connected. In use, the control cabinet 18 controls the bases 19 and 20 to move to the right, so that the pipe body 3 enters between the left and right sides of the gantry 2. Then, the control cabinet 18 controls the output of the motor 72 to drive the lead screws 11 and 4 synchronously, so that the laser rangefinders 5 and 212 can measure the pipe body 3. The measurement results of the laser rangefinders 5 and 212 are fed back to the control cabinet 18 for processing and analysis to obtain the curvature and wall thickness of the pipe body 3. Then, the control cabinet 18 controls the motor 26 to drive the roller 24 to rotate, which drives the pipe body 3 to rotate, thereby helping to improve the detection efficiency of the detector.

[0043] Work process: During use, the control cabinet 18 controls the base 19 and base 2 10 to move the gate 2 to the left, placing the pipe body 3 on the base 19 and base 2 10, and moving the pipe body 3 along with the base 19 and base 2 10 into the space between the two sides of the gate 2. At this time, the fixed seat 20 slides into the slide groove 1 22, the limit plate 23 inserts into the slide groove 2 28 and presses down the motor 2 26, so that the roller 24 fits tightly against the upper side of the pipe body 3. Next, motor 72 drives lead screw 4 and lead screw 11 to start synchronously through transmission belt 71 and synchronous belt 70. The slide cylinder 8 at the output end of lead screw 11 drives slide rod 6 and cleaning block 13 to move. Under the action of spring 14, cleaning block 13 adheres to the inner top wall of pipe body 3 to pre-clean foreign objects on the inner wall. At the same time, laser rangefinder 15 and laser rangefinder 212 move at the same speed and in the same direction, respectively measuring the distance to the outer top wall and inner top wall of the pipe. The data is transmitted to the control cabinet 18 in real time. The linear data of the pipe wall thickness is calculated by preset fixed intervals, and the pipe bending condition is judged based on the distance fluctuation. Then, the control cabinet 18 controls the motor 26 to drive the roller 24 to rotate, which in turn drives the pipe body 3 to rotate on the roller 21 to the unmeasured arc surface. The above steps are repeated to complete the overall data acquisition of the pipe, thereby solving the problem of low efficiency in the prior art when measuring the pipe wall thickness, which requires manual labor.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser-based pipe wall thickness detector, comprising a detection stage (1), characterized in that, A gantry (2) is fixed to the upper side of the testing platform (1). A pipe body (3) is arranged above the testing platform (1). A base one (9) and a base two (10) are slidably connected to the upper side of the testing platform (1) and slidably connected to the lower sides of both ends of the pipe body (3). A screw two (11) passing through both ends of the pipe body (3) is rotatably connected between the base two (10) and the side wall of the gantry (2). A slide cylinder (8) is fixedly arranged at the output end of the screw two (11). A laser rangefinder 2 (12) is fixed on the outer wall of the slide cylinder (8). A lead screw 1 (4) located above the pipe body (3) is rotatably connected between the two side walls of the gantry (2). A laser rangefinder 1 (5) is fixedly installed at the output end of the lead screw 1 (4). The vertical projections of the laser rangefinder 2 (12) and the laser rangefinder 1 (5) coincide. A drive assembly (7) for synchronous driving of the lead screw 1 (4) and the lead screw 2 (11) is provided on the outer wall of the gantry (2).

2. The laser-based pipe wall thickness detector according to claim 1, characterized in that, An upper support rod (17) is fixed between the two side walls of the gantry (2). A slide block (15) is slidably connected to the outer wall of the upper support rod (17). The lower side of the slide block (15) is fixed to the upper side of the output end of the lead screw (4). One end of the lead screw (11) is rotatably connected to the outer wall of the gantry (2). The other end of the lead screw (11) is rotatably connected to a fixed seat (20). A lower support rod (16) is fixed between the fixed seat (20) and the side wall of the gantry (2). The upper outer wall of the lower support rod (16) is slidably connected to the lower side of the output end of the lead screw (11). The outer wall of the base (10) is provided with a sliding groove (22) that slides in cooperation with the fixed seat (20).

3. The laser-based pipe wall thickness detector according to claim 2, characterized in that, The upper side of the testing platform (1) is slidably connected to a base three (19), and the upper side of the base three (19) is rotatably connected to a roller two (25). The lower support rod (16) is slidably connected to the outer wall of the roller two (25). The base two (10) and the base one (9) both pass through the gantry (2).

4. A laser-based pipe wall thickness detector according to claim 1, characterized in that, The pipe body (3) has a roller (24) attached to the upper side of one end near the base (10). The inner wall of the gantry (2) is slidably connected to a motor (26), and the output end of the motor (26) is fixedly set on the outer wall of the roller (24).

5. A laser-based pipe wall thickness detector according to claim 4, characterized in that, The base (10) is fixed with a limiting plate (23) on the side away from the pipe body (3). The outer wall of the gantry (2) is provided with a sliding groove (28) that slides with the limiting plate (23). The inner top wall of the limiting plate (23) is attached to the upper side of the motor (26).

6. A laser-based pipe wall thickness detector according to claim 5, characterized in that, A spring (27) is fixed between the lower side of the motor (26) and the inner wall of the gantry (2), and a groove for accommodating the spring (27) is provided on the inner wall of the gantry (2).

7. A laser-based pipe wall thickness detector according to claim 1, characterized in that, The inner wall of the slide cylinder (8) is slidably connected to a slide rod (6), and a spring (14) is fixed between the lower side of the slide rod (6) and the inner wall of the slide cylinder (8). A cleaning block (13) is fixedly installed on the top of the slide rod (6), and the upper side of the cleaning block (13) slides against the inner top wall of the pipe body (3).

8. A laser-based pipe wall thickness detector according to claim 1, characterized in that, Both the upper sides of the base one (9) and the base two (10) are rotatably connected to roller one (21), and the outer walls of both ends of the pipe body (3) and the outer walls of roller one (21) roll in contact.

9. A laser-based pipe wall thickness detector according to claim 4, characterized in that, The outer wall of the gantry (2) is provided with a drive assembly (7). The drive assembly (7) includes a mounting bracket (73) fixed to the outer wall of the gantry (2). The outer wall of the mounting bracket (73) is fixed with a motor (72). The output end of the motor (72) is fixed with a transmission belt (71). The outer wall of the transmission belt (71) is fixed with one end of a lead screw (11). The outer wall of one end of the lead screw (11) is fixed with a synchronous belt (70). The other end of the synchronous belt (70) is fixed with the outer wall of the lead screw (4).

10. A laser-based pipe wall thickness detector according to claim 9, characterized in that, A control cabinet (18) is provided on one side of the testing platform (1). The control cabinet (18) is electrically connected to motor one (72), motor two (26), laser rangefinder one (5), and laser rangefinder two (12).

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