A measuring device for a corrosion protection coating of the inner wall of a pipe

Abstract

The application discloses a kind of measuring devices for pipeline inner wall anticorrosive coating, it is related to optical measuring device field, it solves the problem that the measuring accuracy of existing pipeline inner wall anticorrosive coating is affected by the deflection of the body position of measuring device for pipeline inner wall anticorrosive coating when using, it is inclined to affect measurement accuracy, including body, positioning plate, support wheel, drive mechanism and measuring mechanism, drive mechanism includes shear lifting frame, mounting plate and drive wheel, measuring mechanism includes first laser head and positioning laser head, the deflection angle of drive wheel and support wheel is synchronously controlled by drive mechanism, and the movement of body along the required path is controlled by drive wheel, the thickness of pipeline inner wall anticorrosive coating is measured by first laser head on measuring mechanism, while positioning laser head emits laser to the middle position of positioning plate, the offset distance of laser irradiation position and positioning plate center position is obtained, the offset condition of body in the inside of pipeline is obtained, and the measurement result is obtained.

Description

Technical Field

[0001] This invention relates to the field of optical measurement device technology, specifically to a measurement device for anti-corrosion coatings on the inner wall of pipes. Background Technology

[0002] In industrial sectors such as petrochemicals, municipal water supply and drainage, and oil and gas transportation, pipelines, as the core carriers of fluid transport, are exposed to corrosive media and complex operating environments for extended periods. The uniformity and integrity of the thickness of the anti-corrosion coating on the inner wall directly determine the pipeline's corrosion resistance and service life, making it a key technical indicator for ensuring the safe operation of the pipeline network and extending its service life. Therefore, accurate and efficient non-destructive testing of the thickness of the anti-corrosion coating on the inner wall of pipelines has become an essential step in pipeline construction acceptance and routine operation and maintenance.

[0003] Currently, most existing technologies and devices for detecting the thickness of anti-corrosion coatings on the inner walls of pipelines suffer from technical defects such as insufficient detection accuracy, poor equipment adaptability, and weak operational stability, making it difficult to meet the high-precision detection requirements of pipelines with different diameters and operating conditions. Conventional detection methods mostly use handheld thickness gauges and single-point ultrasonic testing equipment, which can only achieve rough detection of local locations at the pipe opening end and cannot penetrate deep into the pipeline to complete continuous detection along the entire length. For long-distance, large-diameter pipelines, the detection blind zone is large and the detection efficiency is extremely low. Although some built-in detection devices can enter the pipeline, they generally have the problem of difficulty in centering and positioning the device. The device is prone to displacement and shaking during movement inside the pipeline, and the distance between the detection probe and the inner wall of the pipeline cannot be kept constant, directly leading to a significant increase in the error of the coating thickness detection data. Summary of the Invention

[0004] The purpose of this invention is to provide a measuring device for the anti-corrosion coating of the inner wall of a pipeline, which facilitates the improvement of the stability and measurement accuracy of the machine body moving inside the pipeline, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a measuring device for anti-corrosion coating on the inner wall of a pipe, comprising a body, a positioning plate, a drive mechanism, and a measuring mechanism. The body is uniformly provided with multiple sets of support wheels. The drive mechanism includes multiple sets of scissor lift frames hinged to the body. A mounting plate is hinged to each scissor lift frame, and a drive wheel is provided on the mounting plate. The support wheels are mounted on the mounting plate. The multiple sets of scissor lift frames are uniformly distributed on the outer wall of the body. The drive mechanism can synchronously control the deflection angles of the drive wheels and the support wheels, and control the drive wheels to move the body along the desired path. The measuring mechanism includes a first laser head fixedly mounted on the mounting plate. A positioning laser head is fixedly connected to the center of the side of the machine body near the positioning plate. The measuring mechanism can measure the thickness of the anti-corrosion coating on the inner wall of the pipe through the first laser head. At the same time, the positioning laser head emits a laser beam that irradiates the center of the positioning plate. The positional offset of the machine body inside the pipe is obtained based on the offset distance between the laser irradiation position and the center position of the positioning plate. The accurate result of the anti-corrosion coating thickness is obtained by combining the measurement data of the first laser head, which facilitates the improvement of the stability of the machine body's movement inside the pipe and the measurement accuracy.

[0006] Preferably, the drive mechanism further includes two rotating frames mounted on the mounting plate. The support wheel and the drive wheel are rotatably connected to the rotating frames. A gear column is coaxially fixedly connected to the bottom of the rotating frame, and a positioning plate is fixedly connected to the bottom of the gear column. Two movable slots are provided on the mounting plate, and the positioning plate is movably connected to the inner wall of the movable slots. The mounting plate is provided with an adjusting component for controlling the synchronous deflection adjustment of the two sets of gear columns. The mounting plate is provided with a drive component for driving the drive wheel to rotate, which facilitates the synchronous control of the deflection angle of the drive wheel and the support wheel, and controls the drive wheel to drive the machine body to move along the required path.

[0007] Preferably, the driving component includes a fixed cylinder fixedly mounted on the mounting plate, a rotating cylinder rotatably connected inside the mounting plate, the fixed cylinder being movably sleeved with the inner wall of one set of gear columns, the rotating cylinder being movably sleeved with the inner wall of another set of gear columns, an annular tube fixedly connected inside the mounting plate, the outer wall of the rotating cylinder being rotatably connected to the inner wall of the annular tube, a side hole communicating with the annular tube on the rotating cylinder, and a connecting pipe communicating with the annular tube at the bottom of the fixed cylinder, the connecting pipe being used to store hydraulic oil to facilitate the rotation of the driving wheel.

[0008] Preferably, the driving component further includes a roller rotatably connected to the rotating frame on the driving wheel. The outer wall of the roller is tightly fitted and rollingly connected to the outer wall of the driving wheel. A rotating disk is rotatably connected inside the gear column below the driving wheel. A prism rod is coaxially fixedly connected to the lower part of the rotating disk. A first bevel gear is coaxially fixedly connected to the upper side of the rotating disk. A second bevel gear meshing with the first bevel gear is coaxially fixedly connected to the side of the roller. The inner wall of the rotating cylinder is slidably connected to the outer wall of the prism rod in the vertical direction. A rotating component for driving the rotating cylinder to rotate is provided inside the mounting plate.

[0009] Preferably, the adjusting component includes an electric telescopic rod fixedly installed in the mounting plate. The telescopic end of the electric telescopic rod is fixedly connected to a drive rod that is slidably connected to the inner wall of the mounting plate. Both ends of the drive rod are fixedly connected to racks. The two gear columns are respectively meshed with the nearest set of racks, which facilitates the synchronous deflection adjustment of the two sets of gear columns.

[0010] Preferably, the measuring mechanism includes multiple sets of positioning frames fixedly installed on the positioning plate. Positioning rods are slidably connected within the positioning frames, and clamping blocks are fixedly connected to the positioning rods. The clamping blocks have two sets of arc-shaped protrusions on the side near the positioning plate and one set of arc-shaped protrusions on the side away from the positioning plate. The positioning plate is provided with control components for synchronously adjusting the sliding of the multiple sets of positioning rods, which facilitates the measurement of the thickness of the anti-corrosion coating on the inner wall of the pipe by the first laser head. At the same time, the positioning laser head emits a laser beam that irradiates the center position of the positioning plate. The positional offset of the machine body inside the pipe is obtained based on the offset distance between the laser irradiation position and the center position of the positioning plate. The accurate result of the anti-corrosion coating thickness is obtained by combining the measurement data of the first laser head.

[0011] Preferably, a sliding block is hinged to one end of the scissor lift frame near the mounting plate, the sliding block is slidably connected to the mounting plate, a sliding frame is slidably connected inside the machine body, one side of the scissor lift frame near the machine body is rotatably connected to the sliding frame, a second motor is fixedly connected inside the machine body, and a first threaded rod rotatably connected to the machine body is coaxially fixedly connected to the output end of the second motor. The first threaded rod passes through the sliding frame and is slidably connected to the sliding frame, which facilitates synchronous control of multiple sets of mounting plates for synchronous support and retraction.

[0012] Preferably, the control component includes a third bevel gear rotatably connected to the positioning plate, a second threaded rod rotatably connected inside the positioning frame, a threaded groove in the positioning rod that is threadedly connected to the second threaded rod, a fourth bevel gear coaxially fixedly connected to the second threaded rod and meshing with the third bevel gear, a control block coaxially fixedly connected to the side of the third bevel gear, and the control block rotatably connected to the positioning plate, facilitating the synchronous adjustment of multiple sets of positioning rods for sliding.

[0013] Preferably, the rotating component includes a first motor fixedly installed inside the mounting plate, the output end of the first motor being coaxially and fixedly connected to a worm gear, and the bottom of the rotating cylinder being coaxially and fixedly connected to a worm wheel that meshes with the worm gear, so as to drive the rotating cylinder to rotate.

[0014] Preferably, the end of the machine body away from the positioning plate is provided with a control disk that can rotate and operate. The outer wall of the control disk is evenly provided with multiple sets of second laser heads, which facilitates detection by rotating the second laser heads and improves the detection coverage and accuracy.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a measuring device for the anti-corrosion coating on the inner wall of pipelines. It solves the problem that existing measuring devices for anti-corrosion coatings on the inner wall of pipelines are prone to skew due to the thickness of the coating, affecting measurement accuracy. The device synchronously controls the deflection angles of the drive wheel and support wheel through a drive mechanism, and controls the drive wheel to move the device along the desired path. A first laser head on the measuring mechanism measures the thickness of the anti-corrosion coating on the inner wall of the pipeline. Simultaneously, a positioning laser head emits a laser beam that illuminates the center of a positioning plate. The device determines the positional offset of the device inside the pipeline based on the offset distance between the laser beam position and the center of the positioning plate. The accurate result of the anti-corrosion coating thickness is obtained by combining the measurement data from the first laser head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the measuring mechanism of the present invention; Figure 3 This is a partial structural cross-sectional view of the measuring mechanism of the present invention; Figure 4 for Figure 3 Enlarged view of region A in the middle; Figure 5 for Figure 3 Enlarged view of region B in the middle; Figure 6 This is a partial structural cross-sectional view of the drive mechanism of the present invention; Figure 7 for Figure 6 Enlarged view of region C; Figure 8 This is a partial structural diagram of the drive mechanism of the present invention; Figure 9 for Figure 8 Enlarged view of region D in the middle; Figure 10 This is a partial structural cross-sectional view of the driving component of the present invention; Figure 11 for Figure 10 Enlarged view of region E in the middle; Figure 12 for Figure 10 Enlarged view of the F region.

[0017] In the diagram: 1-Main body; 2-Positioning plate; 3-Support wheel; 4-Scissor lift frame; 5-Mounting plate; 6-Drive wheel; 7-First laser head; 8-Positioning laser head; 9-Rotating frame; 10-Gear column; 11-Positioning disk; 12-Modular groove; 13-Fixed cylinder; 14-Rotating cylinder; 15-Annular tube; 16-Side hole; 17-Connecting pipe; 18-Roller; 19-Rotating disk; 20-Pyramidal rod; 21-First bevel gear; 22-Second bevel gear 23-Wheel; 24-Electric telescopic rod; 25-Drive rod; 26-Rack; 27-Positioning frame; 28-Positioning rod; 29-Clamping block; 30-Sliding block; 31-Sliding frame; 32-Second motor; 33-First threaded rod; 34-Third bevel gear; 35-Threaded groove; 36-Fourth bevel gear; 37-Control block; 38-First motor; 39-Worm gear; 40-Worm wheel; 41-Control panel; 42-Second laser head. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0019] Please see Figures 1-7This invention provides a technical solution: a measuring device for anti-corrosion coating on the inner wall of a pipe, comprising a body 1, a positioning plate 2, a drive mechanism, and a measuring mechanism. Multiple sets of support wheels 3 are evenly distributed on the body 1. The drive mechanism includes multiple sets of scissor-type lifting frames 4 hinged to the body 1. A mounting plate 5 is hinged to each scissor-type lifting frame 4, and a drive wheel 6 is mounted on the mounting plate 5. The support wheels 3 are mounted on the mounting plate 5. The multiple sets of scissor-type lifting frames 4 are evenly distributed on the outer wall of the body 1. The drive mechanism can synchronously control the deflection angles of the drive wheels 6 and the support wheels 3, and control the drive wheels 6 to drive the body 1. Moving along the desired path, the measuring mechanism includes a first laser head 7 fixedly mounted on the mounting plate 5, and a positioning laser head 8 fixedly connected to the middle of the side of the body 1 near the positioning plate 2. The measuring mechanism can measure the thickness of the anti-corrosion coating on the inner wall of the pipe through the first laser head 7, and at the same time, the positioning laser head 8 emits a laser to irradiate the middle position of the positioning plate 2. Based on the offset distance between the laser irradiation position and the center position of the positioning plate 2, the positional offset of the body 1 inside the pipe is obtained. The accurate result of the anti-corrosion coating thickness is obtained by combining the measurement data of the first laser head 7.

[0020] Please see Figures 3-12 The drive mechanism shown in the figure also includes two rotating frames 9 mounted on the mounting plate 5. The support wheel 3 and the drive wheel 6 are rotatably connected to the rotating frames 9. A gear column 10 is coaxially fixedly connected to the bottom of the rotating frame 9, and a positioning plate 11 is fixedly connected to the bottom of the gear column 10. Two movable slots 12 are provided on the mounting plate 5. The positioning plate 11 is movably connected to the inner wall of the movable slot 12. The positioning plate 11 can rotate and rise and fall within the movable slot 12, but will not detach from the movable slot 12. The mounting plate 5 is provided with an adjusting component for controlling the synchronous deflection adjustment of the two sets of gear columns 10. The mounting plate 5 is provided with a mechanism for driving the drive mechanism. The drive component for rotating wheel 6 includes a fixed cylinder 13 fixedly mounted on mounting plate 5, a rotating cylinder 14 rotatably connected inside mounting plate 5, the fixed cylinder 13 being movably sleeved with the inner wall of a set of gear columns 10, the rotating cylinder 14 being movably sleeved with the inner wall of another set of gear columns 10, an annular tube 15 fixedly connected inside mounting plate 5, the outer wall of the rotating cylinder 14 being rotatably connected with the inner wall of the annular tube 15, a side hole 16 communicating with the annular tube 15 on the rotating cylinder 14, and a connecting pipe 17 communicating with the annular tube 15 at the bottom of the fixed cylinder 13, the connecting pipe 17 being used to store hydraulic oil.

[0021] Please see Figures 3-12The driving component shown in the figure also includes a roller 18 rotatably connected to the rotating frame 9 on the driving wheel 6. The outer wall of the roller 18 is tightly fitted and rollingly connected to the outer wall of the driving wheel 6. A rotating disk 19 is rotatably connected inside the gear column 10 below the driving wheel 6. A prism rod 20 is coaxially fixedly connected to the lower part of the rotating disk 19. A first bevel gear 21 is coaxially fixedly connected to the upper side of the rotating disk 19. A second bevel gear 22 that meshes with the first bevel gear 21 is coaxially fixedly connected to the side of the roller 18. The inner wall of the rotating cylinder 14 is slidably connected to the outer wall of the prism rod 20 in the vertical direction. The mounting plate 5 is provided with a mechanism for driving the rotating cylinder 14. The rotating component includes a first motor 38 fixedly installed in the mounting plate 5. The first motor 38 is preferably an LD60 micro motor. The output end of the first motor 38 is coaxially fixedly connected to a worm gear 39. The bottom of the rotating cylinder 14 is coaxially fixedly connected to a worm wheel 40 that meshes with the worm gear 39. The adjusting component includes an electric telescopic rod 23 fixedly installed in the mounting plate 5. The telescopic end of the electric telescopic rod 23 is fixedly connected to a drive rod 24 that slides through the inner wall of the mounting plate 5. Both ends of the drive rod 24 are fixedly connected to racks 25. The two gear columns 10 mesh with the nearest set of racks 25.

[0022] Please see Figures 1-5 The measuring mechanism shown in the figure includes multiple sets of positioning frames 26 fixedly installed on the positioning plate 2. Positioning rods 27 are slidably connected inside the positioning frames 26. Clamping blocks 28 are fixedly connected to the positioning rods 27. The clamping blocks 28 have two sets of arc-shaped protrusions on the side near the positioning plate 2 and one set of arc-shaped protrusions on the side away from the positioning plate 2. The positioning plate 2 is provided with a control component for synchronously adjusting the sliding of multiple sets of positioning rods 27. The control component includes a third bevel gear 33 rotatably connected to the positioning plate 2. A second threaded rod 34 is rotatably connected inside the positioning frames 26. A threaded groove 35 is opened inside the positioning rods 27 to be threadedly connected to the second threaded rod 34. A fourth bevel gear 36 that meshes with the third bevel gear 33 is coaxially fixedly connected to the second threaded rod 34. A control block 37 is coaxially fixedly connected to the side of the third bevel gear 33. The control block 37 is rotatably connected to the positioning plate 2.

[0023] Please see Figures 2-7In the diagram, a sliding block 29 is hinged to one end of the scissor lift frame 4 near the mounting plate 5. The sliding block 29 is slidably connected to the mounting plate 5. A sliding frame 30 is slidably connected inside the body 1. The side of the scissor lift frame 4 near the body 1 is rotatably connected to the sliding frame 30. A second motor 31 is fixedly connected inside the body 1. The preferred model of the second motor 31 is YYHS-40. The output end of the second motor 31 is coaxially fixedly connected to a first threaded rod 32 that is rotatably connected to the body 1. The first threaded rod 32 passes through the sliding frame 30 and is slidably connected to the sliding frame 30. A control disk 41 that can rotate is provided at the end of the body 1 away from the positioning plate 2. Multiple sets of second laser heads 42 are evenly provided on the outer wall of the control disk 41.

[0024] Working principle: The machine body 1 is placed inside one end of the pipe. The first motor 38 and the second motor 31 inside the machine body 1 are controlled by remote control. The data detected by the first laser head 7 and the second laser head 42 are wirelessly transmitted to an external display for display, and the measurement results are obtained. The second motor 31 is controlled to rotate, which drives the first threaded rod 32 to rotate. The first threaded rod 32 drives the sliding frame 30 to slide, so that the bottom of the scissor lift frame 4 gradually moves closer, thereby driving the sliding block 29 at the other end to slide along the mounting plate 5, pushing the mounting plate 5 to the side away from the machine body 1. Since multiple sets of scissor lift frames 4 are driven by a set of second motors 31, multiple sets of mounting plates... The displacement distances of 5 are relatively consistent. When multiple sets of support wheels 3 and drive wheels 6 are in contact with the inner wall of the pipe, the machine body 1 will be in a position close to the center of the pipe. Then, the positioning plate 2 is placed at the end opening of the pipe. Rotating the control block 37 drives the third bevel gear 33 to drive the fourth bevel gear 36 to rotate. The fourth bevel gear 36 drives the second threaded rod 34 to rotate, so that the positioning rod 27 can slide synchronously within the positioning frame 26. At this time, the outer wall of the pipe can be clamped and positioned by the two sets of protrusions on one side of the clamping block 28. If the outer wall cannot be positioned, the inner wall of the pipe can be supported and positioned by a set of protrusions outside the clamping block 28. Finally, the positioning plate 2 is positioned at the middle position of one end of the pipe.

[0025] The electric telescopic rod 23 drives the drive rod 24 to slide, which in turn drives the racks 25 at both ends to slide synchronously. The racks 25 drive the gear column 10 to rotate, thus synchronously adjusting the deflection angle of the two sets of rotating frames 9 on the same mounting plate 5. The electric telescopic rods 23 on multiple sets of mounting plates 5 need to be synchronously controlled to extend and retract, so that the deflection angles of multiple sets of support wheels 3 and drive wheels 6 are consistent, thereby changing the movement state of the machine body 1. When the movement directions of support wheels 3 and drive wheels 6 are in the same straight line, the rotation of drive wheels 6 will drive the machine body 1 to move horizontally along the inner wall of the pipe. When the movement directions of support wheels 3 and drive wheels 6 are parallel, the machine body 1 will... The first laser head 7 moves forward in a spiral motion along the driving direction of the drive wheel 6 within the pipe. The speed of this forward movement can be controlled according to the rotation and deflection angle of the drive wheel 6, allowing the first laser head 7 to fully scan different positions on the inner wall of the pipe. At the same time, it works in conjunction with the second laser head 42, which is set at the front end of the machine body 1 and can rotate and scan autonomously, to complete a comprehensive scan of the anti-corrosion coating on the inner wall of the pipe. Since the first laser head 7 is closer to the inner wall of the pipe than the second laser head 42, the detection accuracy of the first laser head 7 is relatively higher. However, the position of the first laser head 7 is relatively fixed, and it needs to rotate and move in conjunction with the machine body 1 to increase the scanning range.

[0026] The first motor 38 drives the worm gear 39 to rotate, which in turn drives the worm wheel 40 to rotate the rotating cylinder 14. The rotating cylinder 14 then drives the internal prismatic rod 20 to rotate, which in turn drives the first bevel gear 21, causing the second bevel gear 22 to rotate the roller 18. The roller 18 then drives the drive wheel 6 to rotate. This driving method avoids directly mounting the drive motor on the side of the drive wheel 6, making the structure of the drive wheel 6 more compact and flexible. Furthermore, when the gear column 10 drives the rotating frame 9 to rotate, it is not affected by the rotating cylinder 14. The rotation of the rotating frame 9 and the drive wheel 6 will... The gear column 10 rotates along the outer walls of the fixed cylinder 13 and the rotating cylinder 14. The prism rod 20 and the gear column 10 can also be adjusted up and down along the outer walls of the fixed cylinder 13 and the rotating cylinder 14. Because the coating thickness inside the pipe varies, and the distances of the multiple mounting plates 5 from the machine body 1 are relatively consistent, the drive wheel 6 and the support wheel 3 will experience slight vibrations as they move along the inner wall of the pipe. To ensure that the machine body 1 is positioned relatively centrally inside the pipe and to balance the offset caused by slight protrusions or depressions inside, a structure consisting of the gear column 10 and the positioning plate 11 is designed for positioning. The disc 11 can slide and rotate slightly within the movable groove 12. During this sliding motion, the gear column 10 remains engaged with the rack 25 to maintain transmission. The connecting pipe 17 maintains a relative pressure balance between the fixed cylinder 13 and the rotating cylinder 14. When the drive wheel 6 or support wheel 3 experiences a change in force, hydraulic oil transmits the force to the other side, causing a change in pressure on the opposite side and thus improving the stability of the opposite side's support for the pipe wall. The first laser head 7 remains in the center of the mounting plate 5. Slight changes in the positions of the support wheels 3 and drive wheels 6 at both ends affect the detection results of the first laser head 7. The impact is relatively small. In conjunction with the design of the positioning laser head 8 and the positioning plate 2, when the laser of the positioning laser head 8 shines on the center position of the positioning plate 2, it indicates that the machine body 1 is at the center position of the pipeline. The detection result at this time is direct and accurate. When the irradiation position of the positioning laser head 8 is offset, the direction and distance of the offset are the direction and distance of the machine body 1 offset. At this time, the measurement results of the first laser head 7 and the second laser head 42 must balance the offset distance of the machine body 1 in the corresponding direction, so as to make the measurement result more accurate. The specific balance value needs to be calculated according to the actual operation.

[0027] It is worth noting that the walking mode and laser positioning mode of the device are mainly suitable for measurement operations on straight pipes in the horizontal direction. For bends, the positioning laser head 8 cannot operate. The device can only pass through the bend by retracting the mounting plates 5 around the device, leaving only two sets of drive wheels 6 in contact with the inner wall of the pipe. After leaving the bend, the device can reach the straight pipe and then open the scissor lift 4 to support the drive wheels 6 against the inner wall of the pipe. However, at this time, the light from the positioning laser head 8 cannot directly shine through the bend onto the positioning plate 2. If laser-assisted positioning is required, a reflector needs to be installed at the bend to reflect the laser from the positioning laser head 8 onto the positioning plate 2 at the entrance. Alternatively, the positioning plate 2 can be removed and re-supported at one end of the next straight pipe section. Otherwise, the positioning laser head 8 cannot be used to assist in positioning the device at bends.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] 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 measuring device for anti-corrosion coating on the inner wall of a pipe, characterized in that, include: The machine body (1) and the positioning plate (2) are provided with multiple sets of support wheels (3) evenly distributed on the machine body (1); Also includes: The drive mechanism includes multiple sets of scissor lift frames (4) hinged to the body (1). A mounting plate (5) is hinged to the scissor lift frame (4). A drive wheel (6) is provided on the mounting plate (5). A support wheel (3) is mounted on the mounting plate (5). Multiple sets of scissor lift frames (4) are evenly distributed on the outer wall of the body (1). The drive mechanism can synchronously control the deflection angle of the drive wheel (6) and the support wheel (3), and control the drive wheel (6) to drive the body (1) to move along the required path. The measuring mechanism includes a first laser head (7) fixedly installed on the mounting plate (5). A positioning laser head (8) is fixedly connected to the middle of the side of the body (1) near the positioning plate (2). The measuring mechanism can measure the thickness of the anti-corrosion coating on the inner wall of the pipe through the first laser head (7). At the same time, the positioning laser head (8) emits a laser to irradiate the middle position of the positioning plate (2). The positional offset of the body (1) inside the pipe is obtained based on the offset distance between the laser irradiation position and the center position of the positioning plate (2). The accurate result of the anti-corrosion coating thickness is obtained by combining the measurement data of the first laser head (7).

2. The measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 1, characterized in that: The drive mechanism also includes two rotating frames (9) mounted on the mounting plate (5). The support wheel (3) and the drive wheel (6) are rotatably connected to the rotating frame (9). A gear column (10) is coaxially fixedly connected to the bottom of the rotating frame (9). A positioning plate (11) is fixedly connected to the bottom of the gear column (10). Two movable slots (12) are opened on the mounting plate (5). The positioning plate (11) is movably connected to the inner wall of the movable slot (12). An adjusting component is provided on the mounting plate (5) for controlling the synchronous deflection adjustment of the two sets of gear columns (10). A drive component is provided inside the mounting plate (5) for driving the drive wheel (6) to rotate.

3. The measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 2, characterized in that: The driving component includes a fixed cylinder (13) fixedly mounted on the mounting plate (5), a rotating cylinder (14) rotatably connected inside the mounting plate (5), the fixed cylinder (13) being movably sleeved with the inner wall of a set of gear columns (10), the rotating cylinder (14) being movably sleeved with the inner wall of another set of gear columns (10), an annular tube (15) fixedly connected inside the mounting plate (5), the outer wall of the rotating cylinder (14) being rotatably connected with the inner wall of the annular tube (15), a side hole (16) communicating with the annular tube (15) being opened on the rotating cylinder (14), and a connecting pipe (17) communicating with the annular tube (15) being connected to the bottom of the fixed cylinder (13), the connecting pipe (17) being used to store hydraulic oil.

4. The measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 3, characterized in that: The driving component also includes a roller (18) rotatably connected to the rotating frame (9) on the driving wheel (6). The outer wall of the roller (18) is tightly fitted and rolled in contact with the outer wall of the driving wheel (6). A rotating disk (19) is rotatably connected inside the gear column (10) below the driving wheel (6). A prism rod (20) is coaxially fixedly connected below the rotating disk (19). A first bevel gear (21) is coaxially fixedly connected to the upper side of the rotating disk (19). A second bevel gear (22) meshing with the first bevel gear (21) is coaxially fixedly connected to the side of the roller (18). The inner wall of the rotating cylinder (14) is slidably connected to the outer wall of the prism rod (20) in the vertical direction. A rotating component for driving the rotating cylinder (14) to rotate is provided inside the mounting plate (5).

5. A measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 2, characterized in that: The adjusting component includes an electric telescopic rod (23) fixedly installed in the mounting plate (5). The telescopic end of the electric telescopic rod (23) is fixedly connected to a drive rod (24) that is slidably connected to the inner wall of the mounting plate (5). Both ends of the drive rod (24) are fixedly connected to racks (25). The two gear columns (10) are respectively engaged with the nearest set of racks (25).

6. A measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 1, characterized in that: The measuring mechanism includes multiple sets of positioning frames (26) fixedly installed on the positioning plate (2). Positioning rods (27) are slidably connected inside the positioning frames (26). Clamping blocks (28) are fixedly connected to the positioning rods (27). The clamping blocks (28) have two sets of arc-shaped protrusions on the side close to the positioning plate (2) and a set of arc-shaped protrusions on the side away from the positioning plate (2). The positioning plate (2) is provided with control components for synchronously adjusting the sliding of the multiple sets of positioning rods (27).

7. A measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 1, characterized in that: The scissor lift frame (4) has a sliding block (29) hinged to one end near the mounting plate (5). The sliding block (29) is slidably connected to the mounting plate (5). A sliding frame (30) is slidably connected inside the body (1). The side of the scissor lift frame (4) near the body (1) is rotatably connected to the sliding frame (30). A second motor (31) is fixedly connected inside the body (1). The output end of the second motor (31) is coaxially fixedly connected to a first threaded rod (32) rotatably connected to the body (1). The first threaded rod (32) passes through the sliding frame (30) and is slidably connected to the sliding frame (30).

8. A measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 6, characterized in that: The control component includes a third bevel gear (33) rotatably connected to the positioning plate (2), a second threaded rod (34) rotatably connected inside the positioning frame (26), a threaded groove (35) threadedly connected to the second threaded rod (34) inside the positioning rod (27), a fourth bevel gear (36) coaxially fixedly connected to the second threaded rod (34) and meshing with the third bevel gear (33), and a control block (37) coaxially fixedly connected to the side of the third bevel gear (33), and the control block (37) rotatably connected to the positioning plate (2).

9. A measuring device for anti-corrosion coating on the inner wall of a pipeline according to claim 4, characterized in that: The rotating component includes a first motor (38) fixedly installed in the mounting plate (5), and a worm gear (39) is coaxially fixedly connected to the output end of the first motor (38). A worm wheel (40) that meshes with the worm gear (39) is coaxially fixedly connected to the bottom of the rotating cylinder (14).

10. A measuring device for anti-corrosion coating on the inner wall of a pipe according to claim 1, characterized in that: The machine body (1) is provided with a control disk (41) that can rotate and run at one end away from the positioning plate (2), and multiple sets of second laser heads (42) are evenly provided on the outer wall of the control disk (41).

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