A pipeline defect length inspection device

Abstract

The present invention belongs to the field of defect length inspection equipment, and provides a pipeline defect length inspection equipment, including a threaded rod, wherein the threaded rod is slidably connected to a movable seat, and further includes: a cleaning mechanism, wherein the cleaning mechanism can clean the inner wall of the pipeline by continuous rotation; a positioning mechanism, which is arranged on one side of the cleaning mechanism, wherein the positioning mechanism can photograph and locate the corrosion and scratches on the inner wall of the pipeline; an adjustment mechanism is connected to the outer wall of the movable seat, wherein the adjustment mechanism is fixedly connected to a guide groove. In this invention, the cleaning mechanism is started to remove impurities on the inner wall of the pipeline; the positioning mechanism photographs and locates the corrosion and scratches, and when the corrosion and scratches on the inner wall of the pipeline are found, the movable seat continues to move a short distance along the threaded rod, and then the adjustment mechanism drives the guide groove to rotate around the movable seat until the guide groove is facing the corrosion or scratch area.

Description

Technical Field

[0001] The invention belongs to the field of defect length inspection equipment, and in particular relates to a pipeline defect length inspection equipment. Background Art

[0002] Pressure piping refers to all pipelines that are subject to internal or external pressure, regardless of the medium inside the pipe. Pressure piping is a part of a pipeline that is used to transport, distribute, mix, separate, discharge, meter, control and stop the flow of fluids. It is an assembly consisting of pipes, pipe fittings, flanges, bolted connections, gaskets, valves, other components or pressure-bearing parts and supports.

[0003] The existing publication number is CN114910006B, which is a pipeline defect length inspection device, including a mobile system, an internal defect detection system, a surface detection system and a matching imaging system; two mobile systems are provided; an internal defect detection system is connected between the two mobile systems. It mainly detects the corrosion condition of the inner surface of the gas transmission pipeline, and at the same time cleans the debris and attachments on the inner wall of the pipeline that affect the judgment of the corrosion condition, so that the inner wall of the pipeline remains clean, and uses the X-ray flaw detection function to detect internal cracks.

[0004] In the above scheme, a brush is first used to remove impurities from the inner wall of the pipeline, and then the internal cracks are detected through the X-ray flaw detection function. However, since the corrosion damage parts are generally uneven, impurities are more likely to accumulate in the corrosion damage parts when cleaning with a brush, thereby affecting the detection accuracy of the defect length; at this time, if a brush is used to clean the inner wall of the pipeline multiple times and for large-scale fine cleaning, on the one hand, the efficiency of pipeline detection will be reduced, and on the other hand, friction damage will be caused between the brush bristles and the inner wall of the pipeline. Summary of the invention

[0005] The purpose of the present invention is to provide a pipeline defect length inspection device, aiming to solve the technical problem in the prior art that impurities are easily accumulated in corrosion damaged parts, thereby affecting the detection accuracy of defect length.

[0006] The present invention is implemented as follows: a pipeline defect length inspection device includes a threaded rod, the threaded rod is slidably connected to a moving seat, and further includes:

[0007] A cleaning mechanism connected to the movable seat, wherein the cleaning mechanism can clean the inner wall of the pipeline by continuous rotation;

[0008] A positioning mechanism is arranged on one side of the cleaning mechanism, and the positioning mechanism can photograph and locate the corrosion and scratches on the inner wall of the pipeline;

[0009] The outer wall of the movable seat is connected to an adjustment mechanism, the adjustment mechanism is fixedly connected to a guide groove, the adjustment mechanism can drive the guide groove to rotate around the movable seat, the inner wall of the guide groove is fixedly connected to a telescopic driving rod, one end of the telescopic driving rod is fixedly connected to a slide plate, the slide plate is slidably connected to the guide groove, and the side end surface of the slide plate away from the telescopic driving rod is provided with a blower and a spray mechanism, when the blower rotates continuously, the blower can drive the spray mechanism to swing back and forth, and the spray mechanism can spray and clean the inner wall of the pipeline;

[0010] A distance meter is fixedly connected to one side of the slide plate close to the inside of the guide groove, and the distance meter is connected to a water absorbing rod for drying the inner wall of the pipeline.

[0011] Further technical solution: the inner side surface of the guide groove is paved with a plurality of strip-shaped foam strips at intervals, and the surface of the foam strip is an arc surface, the foam strip passes through the bottom of the slide plate, and the foam strip abuts against the slide plate.

[0012] Further technical solution: the water absorption rod is a round roller, the slide plate is fixedly provided with a strip-shaped protrusion, and the water absorption rod can abut against the strip-shaped protrusion.

[0013] Further technical solution: the spray mechanism includes a sprinkler, a driven wheel, a spring and a driving wheel; the sprinkler is rotatably connected to the slide board, a spring is connected between the sprinkler and the slide board, the blower is fixedly connected to the driving wheel, the driving wheel has several rack sections intermittently distributed along the outer wall, the driven wheel is fixedly connected to the sprinkler, and the driven wheel and the driving wheel are meshed, and the sprinkler can be connected to an external water source through a water pipe.

[0014] Further technical solution: The adjustment mechanism includes a No. 3 motor, a No. 3 gear and a No. 3 ring gear, the No. 3 motor is fixedly connected to the movable seat, the No. 3 gear is fixedly connected to the output shaft of the No. 3 motor, the No. 3 ring gear is rotatably connected to the movable seat, and the No. 3 gear is meshed with the No. 3 ring gear.

[0015] Further technical solution: a plurality of filters are arranged on the surface of the skateboard, and activated carbon is arranged in the filters; when the skateboard moves, moisture in the air is absorbed by the filters to prevent moisture in the air from adhering to the rangefinder.

[0016] Further technical solution: The cleaning mechanism includes a No. 1 motor, a No. 1 gear, a No. 1 gear ring and a brush head; the No. 1 motor is fixedly connected to the movable seat, the No. 1 gear is fixedly connected to the output shaft of the No. 1 motor, the No. 1 gear ring is rotatably connected to the movable seat, and the No. 1 gear is meshed with the No. 1 gear ring, and the outer wall of the No. 1 gear ring is annularly fixedly connected with a plurality of brush heads.

[0017] Further technical solution: The positioning mechanism includes a No. 2 ring gear, a No. 2 gear and an X-ray flaw detector, the No. 1 motor is a dual-axis motor, the No. 2 gear is fixedly connected to the output shaft of the No. 1 motor, the No. 2 ring gear is rotatably connected to the movable seat, and the No. 2 ring gear is meshed with the No. 2 gear, and a plurality of X-ray flaw detectors are fixedly connected in an annular shape on the surface of the No. 2 ring gear.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Start the cleaning mechanism to remove impurities on the inner wall of the pipeline; the positioning mechanism takes pictures and locates the corrosion and scratches on the inner wall of the pipeline after cleaning. When the corrosion and scratches on the inner wall of the pipeline are found, the moving seat continues to move a short distance along the threaded rod, and then the adjustment mechanism drives the guide groove to rotate around the moving seat until the guide groove is facing the corrosion or scratch area, so as to locate the corrosion or scratch area;

[0020] 2. The scratched area is sprayed and cleaned in a targeted manner through the spray mechanism. At the same time, the blower can drive the spray mechanism to swing back and forth to achieve multi-angle cleaning of the corroded or scratched area. The telescopic drive rod pushes the slide plate to move in a straight line, and the slide plate drives the spray mechanism to move continuously in a straight line direction and clean the entire corroded or scratched area. On the one hand, the defect length measurement accuracy is improved, and on the other hand, large-scale cleaning of the inner wall of the pipeline is avoided, ensuring the defect length measurement efficiency;

[0021] 3. As the slide plate moves, the water absorption rod dries the inner wall of the pipe and absorbs the water droplets on the inner wall of the pipe; further, the hair dryer can blow the water vapor to the outside of the guide groove, and the water vapor near the corroded or scratched area can be absorbed through the cooperation of the water absorption rod and the hair dryer;

[0022] 4. The foam strip can absorb the splashing water after cleaning, increasing environmental visibility; at the same time, when the slide moves, the foam strip can reduce the vibration of the slide. After the foam strip absorbs water and expands, the vibration reduction effect of the foam strip can be further increased; the surface of the foam strip is an arc surface, which increases the water absorption area on the one hand, and increases the contact area between the foam strip and the slide on the other hand, thereby improving the vibration reduction effect of the slide and further improving the measurement accuracy of the defect length;

[0023] 5. When the slide plate drives the water absorption rod to move, the water absorption rod rolls along the inner wall of the pipe under the action of the extrusion force, which can absorb the moisture in the corroded or scratched area while avoiding the friction between the water absorption rod and the corroded or scratched area of ​​the pipe, which may cause the water absorption rod to be worn; when the water absorption rod rolls, the water in the water absorption rod is squeezed out through the strip-shaped protrusions, and the impurities adsorbed on the surface of the water absorption rod are scraped off. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a connection diagram of the moving seat and the cleaning mechanism;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure enlargement of the A region in the middle;

[0027] Figure 4 It is a schematic diagram of the connection between the adjustment mechanism and the guide groove;

[0028] Figure 5 Schematic diagram of the internal structure of the guide groove;

[0029] Figure 6 It is a structural diagram of the spray mechanism.

[0030] In the attached figure: 1. threaded rod; 2. movable seat; 3. cleaning mechanism; 31. No. 1 motor; 32. No. 1 gear; 33. No. 1 gear ring; 34. brush head; 4. positioning mechanism; 41. No. 2 gear ring; 42. No. 2 gear; 43. X-ray flaw detector; 5. adjustment mechanism; 51. No. 3 motor; 52. No. 3 gear; 53. No. 3 gear ring; 6. guide groove; 7. telescopic driving rod; 8. hair dryer; 9. spray mechanism; 91. sprinkler irrigation; 92. driven wheel; 93. spring; 94. driving wheel; 10. skateboard; 11. rangefinder; 12. foam strip; 13. water absorption rod; 14. connecting rod; 15. bolt; 16. rubber sheet; 17. filter screen; 18. water pipe. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] like Figure 1-Figure 6 As shown, a pipeline defect length inspection device provided by the present invention includes a threaded rod 1, the threaded rod 1 is slidably connected to a moving seat 2, a driving member is arranged inside the moving seat 2, and the driving member drives the moving seat 2 to move along the threaded rod 1 by threaded transmission with the threaded rod 1; one end of the threaded rod 1 is fixedly connected to a plurality of connecting rods 14, the connecting rod 14 is threadedly connected to a bolt 15, and one end of the bolt 15 is fixedly connected to a rubber plate 16, and further includes:

[0034] A cleaning mechanism 3, which is connected to the movable seat 2, and the cleaning mechanism 3 can clean the inner wall of the pipeline by continuous rotation;

[0035] A positioning mechanism 4 is arranged on one side of the cleaning mechanism 3, and the positioning mechanism 4 can take pictures and locate the corrosion and scratches on the inner wall of the pipeline;

[0036] The outer wall of the movable seat 2 is connected with an adjustment mechanism 5, and the adjustment mechanism 5 is fixedly connected with a guide groove 6. The adjustment mechanism 5 can drive the guide groove 6 to rotate around the movable seat 2. The inner wall of the guide groove 6 is fixedly connected with a telescopic driving rod 7, and one end of the telescopic driving rod 7 is fixedly connected with a slide plate 10, and the slide plate 10 is slidably connected with the guide groove 6. The side end surface of the slide plate 10 away from the telescopic driving rod 7 is provided with a blower 8 and a spray mechanism 9. When the blower 8 continues to rotate, the blower 8 can drive the spray mechanism 9 to swing back and forth, and the spray mechanism 9 can spray and clean the inner wall of the pipeline; the rangefinder 11 is connected with a water absorbing rod 13 for drying the inner wall of the pipeline;

[0037] A distance meter 11 is fixedly connected to one side of the slide plate 10 close to the inside of the guide groove 6 .

[0038] In this embodiment, the movable seat 2 is inserted into the pipeline, and then the bolts 15 are rotated in sequence, so that all rubber plates 16 clamp and fix the pipeline, and the movable seat 2 is located at the center of the pipeline;

[0039] The driving member drives the moving seat 2 to move along the threaded rod 1 by means of threaded transmission with the threaded rod 1, and starts the cleaning mechanism 3, and the cleaning mechanism 3 can clean the inner wall of the pipeline by means of continuous rotation;

[0040] The positioning mechanism 4 takes pictures and locates the corrosion and scratches on the inner wall of the pipeline after cleaning. When the corrosion and scratches on the inner wall of the pipeline are found, the moving seat 2 continues to move a short distance along the threaded rod 1, and then the adjustment mechanism 5 drives the guide groove 6 to rotate around the moving seat 2 until the guide groove 6 faces the corrosion or scratch area.

[0041] The scratched area is sprayed and cleaned by the spray mechanism 9, and the blower 8 can drive the spray mechanism 9 to swing back and forth, so as to achieve multi-angle cleaning of the corroded or scratched area; the telescopic driving rod 7 drives the slide plate 10 to move in a straight line, and the slide plate 10 drives the spray mechanism 9 to continuously move in a straight line direction and clean the entire corroded or scratched area;

[0042] At this time, as the slide plate 10 moves, the water absorption rod 13 dries the inner wall of the pipe and absorbs the water droplets on the inner wall of the pipe; further, the blower 8 can blow the water vapor to the outside of the guide groove 6; finally, as the slide plate 10 moves, the rangefinder 11 measures the defect length of the cleaned pipe.

[0043] like Figure 6As shown, a pipeline defect length inspection device provided by the present invention is provided, wherein the inner side surface of the guide groove 6 is provided with a plurality of strip-shaped foam strips 12 at intervals, and the surface of the foam strips 12 is an arc surface, the foam strips 12 penetrate the bottom of the slide plate 10, and the foam strips 12 abut against the slide plate 10;

[0044] The foam strips 12 can absorb the water splashed by the spray after cleaning, thereby increasing environmental visibility; at the same time, when the skateboard 10 moves, the skateboard 10 is damped by the foam strips 12, and the foam strips 12 can further increase the vibration reduction effect of the foam strips 12 after absorbing water and expanding; the surface of the foam strips 12 is an arc-shaped surface, which increases the water absorption area on the one hand, and increases the contact area between the foam strips 12 and the skateboard 10 on the other hand, thereby improving the vibration reduction effect of the skateboard 10.

[0045] like Figure 5-Figure 6 As shown, a pipeline defect length inspection device provided by the present invention is provided, wherein the water absorption rod 13 is a round roller, and the slide plate 10 is fixedly provided with a strip-shaped protrusion, and the water absorption rod 13 can abut against the strip-shaped protrusion; when the slide plate 10 drives the water absorption rod 13 to move, the water absorption rod 13 rolls along the inner wall of the pipeline under the action of the extrusion force, which can absorb moisture from the corroded or scratched area while avoiding friction between the water absorption rod 13 and the corroded or scratched area of ​​the pipeline, causing wear of the water absorption rod 13 and affecting the water absorption effect of the water absorption rod 13; when the water absorption rod 13 rolls, the water in the water absorption rod 13 is squeezed out by the strip-shaped protrusion, and the impurities adsorbed on the surface of the water absorption rod 13 are scraped off.

[0046] like Figure 6 As shown, a pipeline defect length inspection device provided by the present invention is provided, wherein the spray mechanism 9 comprises a sprinkler 91, a driven wheel 92, a spring 93 and a driving wheel 94; the sprinkler 91 is rotatably connected to the slide plate 10, a spring 93 is connected between the sprinkler 91 and the slide plate 10, the blower 8 is fixedly connected to the driving wheel 94, a plurality of racks are intermittently distributed along the outer wall of the driving wheel 94, the driven wheel 92 is fixedly connected to the sprinkler 91, and the driven wheel 92 and the driving wheel 94 are meshed, and the sprinkler 91 can be connected to an external water source through a water pipe 18;

[0047] In this embodiment, the rotation of the hair dryer 8 drives the driving wheel 94 to rotate at the same time. The driving wheel 94 drives the sprinkler 91 to rotate intermittently by engaging with the driven wheel 92. When the driven wheel 92 rotates with the driving wheel 94, the spring 93 is tightened. When the driven wheel 92 is disengaged from the driving wheel 94, the spring 93 pulls the sprinkler 91 to swing in the opposite direction. As the driving wheel 94 rotates, the sprinkler 91 swings back and forth, thereby achieving multi-angle cleaning of corroded or scratched areas.

[0048] like Figure 4As shown, a pipeline defect length inspection device provided by the present invention is provided, wherein the adjustment mechanism 5 comprises a No. 3 motor 51, a No. 3 gear 52 and a No. 3 gear ring 53, wherein the No. 3 motor 51 is fixedly connected to the moving seat 2, the No. 3 gear 52 is fixedly connected to the output shaft of the No. 3 motor 51, the No. 3 gear ring 53 is rotatably connected to the moving seat 2, and the No. 3 gear 52 is meshed with the No. 3 gear ring 53;

[0049] In this embodiment, the third motor 51 is started, and the third motor 51 drives the third gear ring 53 to rotate through the engagement of the third gear 52 and the third gear ring 53, and the third gear ring 53 drives the guide groove 6 to adjust its position.

[0050] As shown in the guide groove 6 of the figure, a pipeline defect length inspection device provided by the present invention is provided. A plurality of filter screens 17 are arranged on the surface of the slide plate 10, and activated carbon is arranged in the filter screens 17. When the slide plate 10 moves, moisture in the air is absorbed by the filter screens 17 to prevent moisture in the air from adhering to the rangefinder 11.

[0051] like Figure 2 As shown, a pipeline defect length inspection device provided by the present invention is provided, and the cleaning mechanism 3 includes a No. 1 motor 31, a No. 1 gear 32, a No. 1 gear ring 33 and a brush head 34; the No. 1 motor 31 is fixedly connected to the movable seat 2, the No. 1 gear 32 is fixedly connected to the output shaft of the No. 1 motor 31, the No. 1 gear ring 33 is rotatably connected to the movable seat 2, and the No. 1 gear 32 is meshed with the No. 1 gear ring 33, and the outer wall of the No. 1 gear ring 33 is annularly fixedly connected with a plurality of brush heads 34; in this embodiment, the No. 1 motor 31 is started, and the No. 1 motor 31 drives the No. 1 gear ring 33 to rotate through the meshing of the No. 1 gear 32 and the No. 1 gear ring 33, and the No. 1 gear ring 33 drives all the brush heads 34 to clean the inner wall of the pipeline.

[0052] like Figure 3 As shown, a pipeline defect length inspection device provided by the present invention is provided, the positioning mechanism 4 includes a second gear ring 41, a second gear 42 and an X-ray flaw detector 43, the first motor 31 is a double-axis motor, the second gear 42 is fixedly connected to the output shaft of the first motor 31, the second gear ring 41 is rotatably connected to the moving seat 2, and the second gear ring 41 is meshed with the second gear 42, and a plurality of X-ray flaw detectors 43 are annularly fixedly connected to the surface of the second gear ring 41;

[0053] The first motor 31 drives the second gear 42 to rotate, and the second gear 42 drives all X-ray flaw detectors 43 to rotate by meshing with the second gear ring 41. The X-ray flaw detectors 43 take pictures of the corrosion and scratch positions on the inner wall of the pipeline.

[0054] Working principle:

[0055] Insert the movable seat 2 into the pipeline, and then turn the bolts 15 in sequence, so that all rubber plates 16 clamp and fix the pipeline, and the movable seat 2 is located in the center of the pipeline;

[0056] The driving member drives the moving seat 2 to move along the threaded rod 1 by means of threaded transmission with the threaded rod 1, and starts the cleaning mechanism 3. The cleaning mechanism 3 can clean the inner wall of the pipeline by continuous rotation to remove impurities on the inner wall of the pipeline;

[0057] The positioning mechanism 4 takes pictures and locates the corrosion and scratches on the inner wall of the pipeline after cleaning. When the corrosion and scratches on the inner wall of the pipeline are found, the moving seat 2 continues to move a short distance along the threaded rod 1, and then the adjustment mechanism 5 drives the guide groove 6 to rotate around the moving seat 2 until the guide groove 6 is facing the corrosion or scratch area, thereby realizing the positioning of the corrosion or scratch area;

[0058] The scratched area is sprayed and cleaned in a targeted manner by the spray mechanism 9, and the blower 8 can drive the spray mechanism 9 to swing back and forth, so as to achieve multi-angle cleaning of the corroded or scratched area; the telescopic driving rod 7 drives the slide plate 10 to move in a straight line, and the slide plate 10 drives the spray mechanism 9 to continuously move in a straight line direction and clean the entire corroded or scratched area;

[0059] During this process, the water sprayed after cleaning will splash everywhere. When the water remains on the inner wall of the pipe, it will cause the light to refract. At the same time, the water vapor generated by the spray will float in the air, affecting the environmental visibility and the measurement accuracy of the defect length.

[0060] At this time, as the slide plate 10 moves, the water absorption rod 13 dries the inner wall of the pipe and absorbs the water droplets on the inner wall of the pipe; further, the blower 8 can blow the water vapor to the outside of the guide groove 6, and through the cooperation of the water absorption rod 13 and the blower 8, the water vapor near the corroded or scratched area is absorbed to improve the measurement accuracy of the defect length;

[0061] When the hair dryer 8 can drive the spray mechanism 9 to swing back and forth, the stability of the slide plate 10 will be reduced, thereby causing the rangefinder 11 to vibrate, affecting the measurement accuracy of the pipeline defect length; at this time, the foam strip 12 can absorb the water flow splashed by the spray after cleaning, thereby increasing environmental visibility; at the same time, when the slide plate 10 moves, the foam strip 12 is used to reduce the vibration of the slide plate 10, and after the foam strip 12 absorbs water and expands, the vibration reduction effect of the foam strip 12 can be further increased; the surface of the foam strip 12 is an arc-shaped surface, which increases the water absorption area on the one hand, and increases the contact area between the foam strip 12 and the slide plate 10 on the other hand, thereby improving the vibration reduction effect of the slide plate 10;

[0062] The guide groove 6 can prevent water from splashing, and the foam strip 12 on the guide groove 6 can absorb and guide the water flow. Under the guidance of the guide groove 6, the blower 8 can quickly discharge water vapor from the vicinity of the corroded or scratched area;

[0063] When the slide plate 10 drives the water absorbing rod 13 to move, the water absorbing rod 13 rolls along the inner wall of the pipe under the action of the extrusion force, which can absorb the water in the corroded or scratched area while avoiding the friction between the water absorbing rod 13 and the corroded or scratched area of ​​the pipe, causing the water absorbing rod 13 to wear and affect the water absorbing effect of the water absorbing rod 13; when the water absorbing rod 13 rolls, the water in the water absorbing rod 13 is squeezed out by the strip-shaped protrusions, and the impurities adsorbed on the surface of the water absorbing rod 13 are scraped off;

[0064] Finally, as the slide plate 10 moves, the distance meter 11 measures the defect length of the cleaned pipeline.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipeline defect length inspection device, comprising a threaded rod (1), wherein the threaded rod (1) is slidably connected to a movable seat (2), characterized in that: Also includes: A cleaning mechanism (3) connected to the movable seat (2), wherein the cleaning mechanism (3) can clean the inner wall of the pipeline by continuously rotating; A positioning mechanism (4) is arranged on one side of the cleaning mechanism (3), and the positioning mechanism (4) is capable of photographing and locating corrosion and scratches on the inner wall of the pipeline; The outer wall of the movable seat (2) is connected to an adjustment mechanism (5), the adjustment mechanism (5) is fixedly connected to a guide groove (6), the adjustment mechanism (5) can drive the guide groove (6) to rotate around the movable seat (2), the inner wall of the guide groove (6) is fixedly connected to a telescopic driving rod (7), one end of the telescopic driving rod (7) is fixedly connected to a slide plate (10), the slide plate (10) is slidably connected to the guide groove (6), and a blower (8) and a spray mechanism (9) are arranged on the side end surface of the slide plate (10) away from the telescopic driving rod (7), when the blower (8) continuously rotates, the blower (8) can drive the spray mechanism (9) to swing back and forth, and the spray mechanism (9) can spray and clean the inner wall of the pipeline; A distance meter (11) is fixedly connected to one side of the slide plate (10) close to the inside of the guide groove (6), and the distance meter (11) is connected to a water absorption rod (13) for drying the inner wall of the pipeline; The inner side surface of the guide groove (6) is provided with a plurality of strip-shaped foam strips (12) at intervals, and the surface of the foam strips (12) is an arc-shaped surface. The foam strips (12) penetrate the bottom of the slide plate (10), and the foam strips (12) abut against the slide plate (10); The spray mechanism (9) comprises a sprinkler (91), a driven wheel (92), a spring (93) and a driving wheel (94); the sprinkler (91) is rotatably connected to the slide plate (10); a spring (93) is connected between the sprinkler (91) and the slide plate (10); the blower (8) is fixedly connected to the driving wheel (94); a plurality of racks are intermittently distributed along the outer wall of the driving wheel (94); the driven wheel (92) is fixedly connected to the sprinkler (91), and the driven wheel (92) and the driving wheel (94) are meshed; the sprinkler (91) can be connected to an external water source via a water pipe (18).

2. A pipeline defect length inspection device according to claim 1, characterized in that: The water absorbing rod (13) is a round roller, and the slide plate (10) is fixedly provided with a strip-shaped protrusion, and the water absorbing rod (13) can abut against the strip-shaped protrusion.

3. The pipeline defect length inspection device according to claim 1 is characterized in that: The adjustment mechanism (5) comprises a No. 3 motor (51), a No. 3 gear (52) and a No. 3 ring gear (53); the No. 3 motor (51) is fixedly connected to the movable seat (2); the No. 3 gear (52) is fixedly connected to the output shaft of the No. 3 motor (51); the No. 3 ring gear (53) is rotationally connected to the movable seat (2); and the No. 3 gear (52) is meshed with the No. 3 ring gear (53).

4. The pipeline defect length inspection device according to claim 1 is characterized in that: A plurality of filter screens (17) are arranged on the surface of the slide plate (10), and activated carbon is arranged in the filter screens (17); when the slide plate (10) moves, moisture in the air is absorbed by the filter screens (17), thereby preventing moisture in the air from adhering to the rangefinder (11).

5. The pipeline defect length inspection device according to claim 1 is characterized in that: The cleaning mechanism (3) comprises a No. 1 motor (31), a No. 1 gear (32), a No. 1 gear ring (33) and a brush head (34); the No. 1 motor (31) is fixedly connected to the movable seat (2), the No. 1 gear (32) is fixedly connected to the output shaft of the No. 1 motor (31), the No. 1 gear ring (33) is rotationally connected to the movable seat (2), and the No. 1 gear (32) is meshed with the No. 1 gear ring (33), and the outer wall of the No. 1 gear ring (33) is annularly fixedly connected with a plurality of brush heads (34).

6. A pipeline defect length inspection device according to claim 5, characterized in that: The positioning mechanism (4) comprises a second gear ring (41), a second gear (42) and an X-ray flaw detector (43); the first motor (31) is a dual-axis motor; the second gear (42) is fixedly connected to the output shaft of the first motor (31); the second gear ring (41) is rotationally connected to the movable seat (2); the second gear ring (41) is meshed with the second gear (42); and a plurality of X-ray flaw detectors (43) are annularly fixedly connected to the surface of the second gear ring (41).

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