Pipe detection device

Abstract

The utility model provides a pipe detection device. The pipe detection device comprises an outer wall detection mechanism, an inner wall detection mechanism and a pipe rotating mechanism, the pipe rotating mechanism comprises two rollers arranged in parallel, a first driving mechanism and a second driving mechanism, and a pipe bearing space is formed in the upper space between the two rollers; when a to-be-detected pipe is placed in the pipe bearing space, the axial direction of the to-be-detected pipe is parallel to the axial directions of the two rollers and tangent to the two rollers, and the two rollers rotate in the same direction to drive the to-be-detected pipe to rotate. The pipe rotating mechanism is arranged, and during detection, the two rollers of the pipe rotating mechanism rotate to drive the pipe to be detected to rotate so as to be matched with the outer wall detection mechanism and the inner wall detection mechanism to achieve rotating detection of the outer surface and the inner surface of the pipe.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology, and in particular to a pipe inspection device. Background Technology

[0002] Pipes (such as metal pipes) are widely used in the machinery industry. With increasing demand, the requirements for the surface quality of pipes (including both outer and inner surfaces) are also rising. Traditional manual inspection methods not only consume a large amount of labor but also have low efficiency and quality. Therefore, there is an urgent need to design a highly automated pipe inspection device.

[0003] Machine vision inspection technology is a technology that relies on computer science to automatically inspect materials by replacing manual labor. Applying it to pipe defect inspection can not only achieve automatic inspection and reduce labor costs, but also greatly improve the efficiency and quality of inspection.

[0004] For example, a Chinese invention patent application titled "Vision-Based Steel Pipe Defect Detection System," publication number CN109668907A, includes a computer, an image storage module, a pipe outer surface inspection camera, a pipe inner surface inspection camera, and an image analysis module. The pipe outer surface inspection camera is located on the outside of the pipe and connected to the image storage module, used to photograph the pipe's outer surface and transmit the resulting image to the image storage system. The pipe inner surface inspection camera extends into the pipe and is connected to the image storage module, used to photograph the pipe's inner surface and transmit the resulting image to the image storage system. The image storage module stores the images captured by the pipe outer and inner surface inspection cameras. The computer is connected to the image storage module to acquire the images stored in the image storage module and to activate the image analysis module. The image analysis module is installed inside the computer and is used to analyze and recognize the images.

[0005] To improve the reliability of inspection, it is necessary to inspect the inner and outer surfaces of the pipe in 360°. However, in the existing technology, pipe inspection devices equipped with vision-based pipe defect inspection systems cannot achieve 360° rotation inspection of the pipe, or can rotate but cannot be used for pipes of different lengths or diameters, which limits the inspection. Summary of the Invention

[0006] This utility model provides a pipe inspection device that can perform 360° rotation inspection of pipes and can be used to inspect pipes of different lengths or diameters.

[0007] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is a pipe testing device, comprising:

[0008] An external wall inspection mechanism, comprising an external wall inspection frame and external wall visual inspection elements mounted on the external wall inspection frame;

[0009] An internal wall inspection mechanism, comprising an internal wall inspection frame and an internal wall visual inspection element mounted on the internal wall inspection frame;

[0010] The pipe rotation mechanism includes two parallel rollers, a first drive mechanism for driving the two rollers to rotate respectively, and a second drive mechanism for driving at least one of the rollers to move to change the distance between the two rollers. The space above the two rollers forms a pipe bearing space for bearing the pipe to be tested. When the pipe to be tested is placed in the pipe bearing space, its axis is parallel to the axis of the two rollers and tangent to both rollers. The two rollers rotate in the same direction, driving the pipe to be tested to rotate.

[0011] The second driving mechanism is an electric lead screw mechanism, and the two rollers are respectively equipped with roller supports; among the two rollers, the roller support of the first roller is connected to the sliding nut of the electric lead screw mechanism as a whole, and the roller support of the second roller is fixedly set; the second driving mechanism drives the first roller and its roller support to move closer to or further away from the second roller, so as to change the distance between the two rollers.

[0012] Both rollers, their roller supports, and the second drive mechanism are all mounted on the same support plate. A first guide assembly is provided between the support plate and the roller support of the first roller to guide the movement of the first roller and its roller support.

[0013] The pipe inspection device further includes a conveying mechanism, which includes a first horizontal moving component and a second guiding component. The movement direction of the first horizontal moving component is perpendicular to the axis of the roller. The support plate is integrated with the moving part of the first horizontal moving component and is guided by the second guiding component.

[0014] The two ends of the two rollers are flush.

[0015] The pipe testing device also includes two side positioning mechanisms, located on the outer sides of both ends of the pipe to be tested when it is in the testing position, for pushing the pipe to be tested from the outer sides of both ends of the pipe to be tested so that the pipe to be tested is centered relative to the two rollers.

[0016] The side positioning mechanism includes a first vertical lifting assembly and a horizontal pushing assembly. The horizontal pushing assembly is disposed on the lifting component of the first vertical lifting assembly. The horizontal pushing assembly includes a horizontally movable pushing component, and the moving direction of the pushing component is parallel to the axial direction of the pipe to be tested.

[0017] The external wall visual inspection element includes an external wall inspection industrial camera and an external wall inspection light source, with the external wall inspection light source located on both sides below the external wall inspection industrial camera.

[0018] The external wall detection industrial camera and the external wall detection light source are mounted on the same bracket;

[0019] The outer wall inspection frame is provided with a second horizontal moving component and a second vertical lifting component. The movement direction of the second horizontal moving component is parallel to the axis of the roller. The second vertical lifting component is located on the moving part of the second horizontal moving component. The bracket is connected to the lifting part of the second vertical lifting component.

[0020] The inner wall inspection frame is equipped with a third horizontal moving component and a third vertical lifting component. The movement direction of the third horizontal moving component is parallel to the axis of the roller. The third horizontal moving component is located on the lifting part of the third vertical lifting component.

[0021] The inner wall visual inspection element includes an inner wall inspection miniature industrial camera, which is mounted on the moving part of the third horizontal moving assembly. Driven by the third horizontal moving assembly, the camera extends into or out of the pipe to be inspected along the axial direction of the pipe to be inspected.

[0022] The inner wall detection miniature industrial camera is symmetrically arranged in two locations, corresponding one-to-one with the two ends of the pipe to be detected, and the third horizontal moving component is correspondingly arranged in two locations.

[0023] Compared with the prior art, the present invention has the following advantages and positive effects:

[0024] 1. In addition to the outer wall detection mechanism and the inner wall detection mechanism, the pipe detection device of this utility model is also provided with a pipe rotation mechanism. The pipe rotation mechanism includes two parallel rollers that rotate under the drive of the first drive mechanism. During detection, the pipe to be detected is placed in the pipe bearing space above the two rollers. The axial direction of the pipe to be detected is parallel to the axial direction of the two rollers and tangent to both rollers. The rotation of the two rollers drives the pipe to be detected to rotate, so as to cooperate with the outer wall detection mechanism and the inner wall detection mechanism to realize 360° detection of the outer surface and 360° detection of the inner surface of the pipe.

[0025] 2. The pipe testing device of this utility model can change the distance between the two rollers through the second driving mechanism, so that the two rollers can meet the rotation testing requirements of pipes with different diameters; and the pipes to be tested within a certain length range can be placed between the two rollers, so the pipe testing device of this utility model can also be used to test pipes of different lengths. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the pipe testing device from one perspective in an embodiment of this utility model.

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the pipe testing device from another perspective in an embodiment of this utility model;

[0029] Figure 3 This is a three-dimensional structural diagram of the assembly structure of the pipe rotating mechanism and the conveying mechanism of the pipe testing device in this utility model embodiment.

[0030] Figure 4 for Figure 3 Enlarged view of part A;

[0031] Figure 5 This is a side view of the pipe rotation mechanism of the pipe testing device in this embodiment of the utility model;

[0032] Figure 6 This is a three-dimensional structural diagram of the assembly structure of the pipe rotating mechanism and the conveying mechanism of the pipe testing device in this utility model embodiment from another perspective.

[0033] Figure 7 This is a three-dimensional structural diagram of the side positioning component of the pipe inspection device in an embodiment of this utility model;

[0034] Figure 8 This is a three-dimensional structural diagram of the outer wall detection mechanism of the pipe detection device in an embodiment of the present utility model.

[0035] Figure 9 This is a three-dimensional structural schematic diagram of the outer wall detection mechanism of the pipe detection device in an embodiment of the present utility model from another perspective.

[0036] Figure 10 This is a three-dimensional structural diagram of the inner wall detection mechanism of the pipe detection device in an embodiment of the present utility model.

[0037] Figure 11 This is a three-dimensional structural diagram of the inner wall detection mechanism of the pipe detection device in this embodiment of the present invention from another perspective.

[0038] Figure label:

[0039] 100. External wall inspection mechanism; 110. External wall inspection frame; 111. Top crossbeam of external wall inspection frame; 120. External wall inspection industrial camera; 130. External wall inspection light source; 140. Bracket; 150. Second horizontal movement assembly; 160. Second vertical lifting assembly;

[0040] 200. Inner wall inspection mechanism; 210. Inner wall inspection frame; 211. Top crossbeam of inner wall inspection frame; 220. Third horizontal movement assembly; 230. Third vertical lifting assembly; 240. Miniature industrial camera for inner wall inspection; 250. Connecting plate; 260. Third guide assembly;

[0041] 300. Pipe rotation mechanism; 310. First roller; 320. Second roller; 330. First drive mechanism; 340. Second drive mechanism; 350. Roller support; 360. Support plate; 370. First guide assembly;

[0042] 400, horizontal substrate;

[0043] 500. Conveying mechanism; 510. First horizontal movement component; 520. Second guide component;

[0044] 600. Side positioning mechanism; 610. First vertical lifting assembly; 620. Horizontal pushing assembly; 621. Pushing component;

[0045] 700. Pipe material to be tested. Detailed Implementation

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0048] Reference Figures 1 to 6 The pipe inspection device in some embodiments of this utility model is specifically a vision-based pipe inspection device, including an outer wall inspection mechanism 100 for defect detection on the outer wall, i.e., the outer circumferential surface, of the pipe to be inspected 700 (such as a metal pipe). It includes an outer wall inspection frame 110 and an outer wall visual inspection element mounted on the frame 110. The detection principle of the outer wall visual inspection element on the outer wall of the pipe to be inspected 700 is the same as in the prior art and will not be described further here.

[0049] The pipe inspection device in some embodiments of this utility model further includes an inner wall inspection mechanism 200, used for defect inspection of the inner wall, i.e., the inner circumferential surface, of the pipe 700 to be inspected. The mechanism includes an inner wall inspection frame 210 and an inner wall visual inspection element mounted on the inner wall inspection frame 210. The inspection principle of the inner wall visual inspection element on the inner wall of the pipe 700 to be inspected is the same as in the prior art and will not be described again here.

[0050] The pipe inspection device in some embodiments of this utility model further includes a pipe rotation mechanism 300, which supports and drives the pipe 700 to be inspected to rotate around its axial direction, so that the outer wall inspection mechanism 100 (specifically an outer wall visual inspection element) can perform 360° comprehensive inspection of the outer wall of the pipe 700 to be inspected, and the inner wall inspection mechanism 200 (specifically an inner wall visual inspection element) can perform 360° comprehensive inspection of the inner wall of the pipe 700 to be inspected.

[0051] like Figures 3 to 6 As shown, the pipe rotation mechanism 300 includes two parallel rollers, a first drive mechanism 330 for driving the two rollers to rotate respectively, and a second drive mechanism 340 for driving at least one of the rollers to move to change the distance between the two rollers. The space above the two rollers constitutes a pipe bearing space for bearing the pipe to be tested 700. When the pipe to be tested 700 is placed in the pipe bearing space, its axial direction is parallel to the axial direction of the two rollers and tangent to both rollers. Figure 5 As shown, the two rollers rotate in the same direction, driving the pipe to be tested, 700, to rotate.

[0052] In some embodiments of this utility model, such as Figures 3 to 6 As shown, the two rollers of the pipe rotating mechanism 300 are identical, parallel, and directly opposite each other, with the same diameter and installation height. A certain distance is spaced between the two rollers. The pipe to be tested 700 is positioned between and supported by the two rollers. The two rollers rotate in the same direction, causing the pipe to be tested 700 to rotate. For example, if the two rollers rotate clockwise synchronously, the pipe to be tested 700 will rotate counterclockwise. Figure 5 As shown; the two rollers rotate counterclockwise synchronously, driving the tube to be tested 700 to rotate clockwise. The first drive mechanism 330 can be an electric mechanism, such as a motor, and one set is set for each of the two rollers.

[0053] The outer wall detection mechanism 100, the inner wall detection mechanism 200 and the pipe rotation mechanism 300 can be set on the same horizontal base plate 400 to improve the overall integrity of the device.

[0054] Reference Figure 8 and Figure 9 At the same time, combined Figure 1 and Figure 2The outer wall inspection frame 110 is an inverted U-shaped frame, which is erected on the horizontal base plate 400 and spans above the pipe rotating mechanism 300 to make the structure compact. The top crossbeam 111 of the outer wall inspection frame is parallel to the roller axis, and the outer wall visual inspection element is located on the top crossbeam 111 of the outer wall inspection frame.

[0055] Similarly, refer to Figure 10 and Figure 11 At the same time, combined Figure 1 and Figure 2 The inner wall inspection frame 210 is an inverted U-shaped frame, which is erected on the horizontal base plate 400 and spans above the pipe rotating mechanism 300 to make the structure compact. The top crossbeam 211 of the inner wall inspection frame is parallel to the roller axis, and the inner wall visual inspection element is located on the top crossbeam 211 of the inner wall inspection frame.

[0056] That is, the outer wall inspection frame 110 and the inner wall inspection frame 210 are arranged parallel to each other and spaced apart along the arrangement direction of the two rollers.

[0057] By setting up a pipe rotation mechanism 300, two parallel rollers rotate under the drive of the first drive mechanism 330. During testing, the pipe to be tested 700 is placed in the pipe bearing space above the two rollers. The axial direction of the pipe to be tested 700 is parallel to the axial direction of the two rollers and tangent to both rollers. The rotation of the two rollers drives the pipe to be tested 700 to rotate, so that the outer wall detection mechanism 100 and the inner wall detection mechanism 200 can perform 360° detection on the outer circumference and 360° detection on the inner circumference of the pipe.

[0058] Furthermore, the distance between the two rollers can be changed through the second drive mechanism 340, so that the two rollers can meet the rotation detection requirements of pipes with different diameters. Moreover, the pipes 700 to be tested within a certain length range can be placed between the two rollers, which improves the versatility of the pipe testing device in this embodiment for testing pipes of different lengths.

[0059] In some embodiments of this utility model, such as Figure 4 As shown, the second drive mechanism 340 is an electric lead screw mechanism. Each of the two rollers is equipped with a roller support 350, and the rollers are rotatably mounted on the roller support 350. For ease of description, the two rollers are defined as the first roller 310 and the second roller 320, respectively. The roller support 350 of the first roller 310 is connected to the sliding nut of the electric lead screw mechanism as a whole, and the roller support 350 of the second roller 320 is fixedly mounted. The second drive mechanism 340 drives the first roller 310 and its roller support 350 to move closer to or further away from the second roller 320, thereby changing the distance between the two rollers.

[0060] The distance between the two rollers is changed by fixing one roller in a fixed position and moving the other roller. The structure is simple, the movement is simple, and it is easy to control.

[0061] To ensure smooth movement of the first roller 310 and its roller support 350, the first roller 310 and its roller support 350, the second roller 320 and its roller support 350, and the second drive mechanism 340 are all mounted on the same horizontally arranged support plate 360. A first guide assembly 370 is provided between the support plate 360 ​​and the roller support 350 of the first roller 310 to guide the movement of the first roller 310 and its roller support 350.

[0062] Specifically, such as Figure 4 As shown, the second drive mechanism 340 is located at the middle of the first roller 310, and the first guide assembly 370 is provided at two locations, respectively at both ends of the first roller 310. Each first guide assembly 370 includes a guide rail and a slider. The guide rail is fixed on the support plate 360 ​​and extends along the arrangement direction of the two rollers. The slider is fixed on the bottom surface of the roller bracket 350 of the first roller 310 and slides in cooperation with the guide rail.

[0063] To facilitate the loading and unloading of the pipe 700 to be tested, further, in some embodiments of this utility model, such as Figures 1 to 4 as well as Figure 6 As shown, the pipe testing device also includes a handling mechanism 500.

[0064] The conveying mechanism 500 includes a first horizontal moving component 510 and a second guiding component 520. The movement direction of the first horizontal moving component 510 (specifically, the movement direction of the moving part of the first horizontal moving component 510) is perpendicular to the axis of the rollers, i.e., along the arrangement direction of the two rollers. The support plate 360 ​​is integrally connected to the moving part of the first horizontal moving component 510 and is guided by the second guiding component 520.

[0065] Specifically, the second guide assembly 520 also includes a guide rail and a slider. The guide rail is fixedly installed and extends along the arrangement direction of the two rollers. The slider is fixed on the bottom surface of the support plate 360 ​​and slides and guides the guide rail.

[0066] Similarly, the first horizontal moving component 510 is located in the middle of the pipe rotating mechanism 300, and the second guiding component 520 is provided in two places, located at both ends of the roller respectively.

[0067] The first horizontal moving component 510 can be a linear module or an electric lead screw, etc., and no specific restrictions are imposed here.

[0068] Because the placement of the tube 700 to be inspected between the two rollers is not always accurate, one end of the tube may extend beyond the outer side of one roller, while the other end may be inside the other roller. In other words, the tube 700 is not centered relative to the two rollers in the length direction. This can affect the rotational stability of the tube, or the tube may exceed the visual inspection range, affecting the reliability of the inspection. To solve this problem, in some embodiments of this invention, the first roller 310 and the second roller 320 are identical except that their two ends are flush, i.e., completely symmetrical.

[0069] Accordingly, the pipe inspection device in this embodiment also includes two side positioning mechanisms 600, as shown in the reference. Figure 7 At the same time, combined Figure 1 and Figure 2 Two side positioning mechanisms 600 are located on the outer sides of both ends of the tube 700 to be tested in the detection position. They are used to push the tube 700 to be tested from the outer sides of both ends of the tube 700 to be tested so that the tube 700 to be tested is placed in the center relative to the two rollers, so that the projections of the center of the tube 700 to be tested, the center of the first roller 310, and the center of the second roller 320 on the same horizontal plane are on the same straight line.

[0070] By setting the side positioning mechanism 600, the pipe 700 to be tested in the detection position can be kept in the center, so that the pipe can rotate stably, avoid tipping over, and easily ensure that the pipe 700 to be tested is within the detection range of the optical detection element.

[0071] In some embodiments of this utility model, such as Figure 7 As shown, the side positioning mechanism 600 includes a first vertical lifting assembly 610 and a horizontal pushing assembly 620. The horizontal pushing assembly 620 is mounted on the lifting component of the first vertical lifting assembly 610. The horizontal pushing assembly 620 includes a horizontally movable pushing component 621. The moving direction of the pushing component 621 is parallel to the axial direction of the pipe 700 to be tested.

[0072] The horizontal movement of the pushing component 621 of the horizontal pushing assembly 620 in the side positioning mechanism 600 at both ends pushes the pipe to be tested 700 to move axially and gradually reach the position centered relative to the roller; the first vertical lifting assembly 610 drives the horizontal pushing assembly 620 to rise and fall vertically, which in turn drives the pushing component 621 to rise and fall vertically, so that the pushing component 621 can adapt to the centering positioning of pipes 700 of different diameters.

[0073] The first vertical lifting component 610 can be a linear module or an electric lead screw, etc., and no specific restrictions are imposed here. Similarly, the horizontal pushing component 620 can be a linear module or an electric lead screw, etc., and no specific restrictions are imposed here.

[0074] like Figure 8 and Figure 9 As shown, the external wall visual inspection element specifically includes an external wall inspection industrial camera 120 and an external wall inspection light source 130. The external wall inspection light source 130 is located on both sides below the external wall inspection industrial camera 120 to increase the illumination range of the light source.

[0075] Furthermore, the external wall inspection industrial camera 120 and the external wall inspection light source 130 are mounted on the same bracket 140; the external wall inspection frame 110 is provided with a second horizontal moving component 150 and a second vertical lifting component 160. The movement direction of the second horizontal moving component 150 is parallel to the axis of the roller, and the second vertical lifting component 160 is mounted on the moving part of the second horizontal moving component 150. The bracket 140 is connected to the lifting part of the second vertical lifting component 160.

[0076] The second vertical lifting assembly 160 can drive the support 140 to rise and fall, thereby driving the outer wall visual inspection element to rise and fall, thus adapting to the outer wall inspection of pipes 700 with different diameters. The second horizontal moving assembly 150 drives the second vertical lifting assembly 160 to translate in a direction parallel to the axis of the roller, thereby driving the outer wall visual inspection element to translate in a direction parallel to the axis of the roller, increasing the length range of the pipes 700 that can be inspected, and further improving the versatility of the inspection.

[0077] Similarly, the second vertical lifting component 160 can be a linear module or an electric lead screw, etc., without specific restrictions. The second horizontal moving component 150 can also be a linear module or an electric lead screw, etc., without specific restrictions.

[0078] like Figure 10 and Figure 11 As shown, the inner wall inspection frame 210 is provided with a third horizontal moving component 220 and a third vertical lifting component 230. The movement direction of the third horizontal moving component 220 is parallel to the axis of the roller, and the third horizontal moving component 220 is located on the lifting component of the third vertical lifting component 230.

[0079] The internal wall visual inspection element includes an internal wall inspection miniature industrial camera 240, which is mounted on the moving part of the third horizontal moving assembly 220. Driven by the third horizontal moving assembly 220, the internal wall inspection miniature industrial camera 240 extends into or out of the pipe 700 to be inspected along the axial direction of the pipe 700 to be inspected.

[0080] The moving part of the third horizontal moving component 220 drives the inner wall detection miniature industrial camera 240 to extend into the pipe 700 along the axial direction of the pipe to be inspected for inner wall inspection, or, after inspection, drives the inner wall detection miniature industrial camera 240 away from the pipe 700 without interfering with it. The third vertical lifting component 230 drives the third horizontal moving component 220, thereby enabling the inner wall detection miniature industrial camera 240 to perform lifting and lowering movements to adapt to the inner wall inspection of pipes 700 of different diameters.

[0081] Similarly, the third vertical lifting component 230 can be a linear module or an electric lead screw, etc., without specific restrictions. The third horizontal moving component 220 can be a linear module or an electric lead screw, etc., without specific restrictions.

[0082] Furthermore, two miniature industrial cameras 240 for inner wall inspection are symmetrically arranged, corresponding one-to-one with both ends of the pipe 700 to be inspected, and two corresponding third horizontal moving components 220 are also arranged. The two miniature industrial cameras 240 extend into the pipe 700 from both ends to take pictures and inspect it. For pipes 700 with a large length, compared to using only one miniature industrial camera 240, the extension length of the camera inside the pipe can be reduced, thereby reducing the possibility of deformation of the camera due to gravity inside the pipe, and also improving inspection efficiency.

[0083] Taking the third vertical lifting component 230 as an example, which is a linear module, it is installed on the top crossbeam 211 of the inner wall inspection frame. Since the overall length is relatively large due to the installation of two third horizontal moving components 220, the third vertical lifting component 230 is positioned in the middle of the top crossbeam 211 of the inner wall inspection frame. A connecting plate 250 connects the slider of the third vertical lifting component 230, and the two third horizontal moving components 220 are mounted on this connecting plate 250. The third vertical lifting component 230 drives the connecting plate 250 to rise and fall, thereby synchronously raising and lowering the two third horizontal moving components 220 and the inner wall inspection miniature industrial camera 240.

[0084] To improve the stability of the vertical lifting and lowering motion of the two third horizontal moving components 220, a third guide component 260 is provided between the connecting plate 250 and the top crossbeam 211 of the inner wall inspection frame to guide the lifting and lowering motion of the connecting plate 250. Multiple third guide components 260 can be provided along the horizontal direction to improve the reliability of the guidance.

[0085] Specifically, the third guide assembly 260 also includes a guide rail and a slider. The guide rail is fixedly mounted on the top crossbeam of the inner wall inspection frame 210 and extends vertically. The slider is fixedly mounted on the connecting plate 250 and slides and guides the guide rail.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pipe testing device, characterized in that, include: An external wall inspection mechanism, comprising an external wall inspection frame and external wall visual inspection elements mounted on the external wall inspection frame; An internal wall inspection mechanism, comprising an internal wall inspection frame and an internal wall visual inspection element mounted on the internal wall inspection frame; The pipe rotation mechanism includes two parallel rollers, a first drive mechanism for driving the two rollers to rotate respectively, and a second drive mechanism for driving at least one of the rollers to move to change the distance between the two rollers. The space above the two rollers forms a pipe bearing space for bearing the pipe to be tested. When the pipe to be tested is placed in the pipe bearing space, its axis is parallel to the axis of the two rollers and tangent to both rollers. The two rollers rotate in the same direction, driving the pipe to be tested to rotate.

2. The pipe testing device according to claim 1, characterized in that, The second driving mechanism is an electric lead screw mechanism, and the two rollers are respectively equipped with roller supports; among the two rollers, the roller support of the first roller is connected to the sliding nut of the electric lead screw mechanism as a whole, and the roller support of the second roller is fixedly set; the second driving mechanism drives the first roller and its roller support to move closer to or further away from the second roller, so as to change the distance between the two rollers.

3. The pipe testing device according to claim 2, characterized in that, Both rollers, their roller supports, and the second drive mechanism are all mounted on the same support plate. A first guide assembly is provided between the support plate and the roller support of the first roller to guide the movement of the first roller and its roller support.

4. The pipe testing device according to claim 3, characterized in that, The pipe inspection device further includes a conveying mechanism, which includes a first horizontal moving component and a second guiding component. The movement direction of the first horizontal moving component is perpendicular to the axis of the roller. The support plate is integrated with the moving part of the first horizontal moving component and is guided by the second guiding component.

5. The pipe testing device according to claim 1, characterized in that, The two ends of the two rollers are flush; The pipe testing device also includes two side positioning mechanisms, located on the outer sides of both ends of the pipe to be tested when it is in the testing position, for pushing the pipe to be tested from the outer sides of both ends of the pipe to be tested so that the pipe to be tested is centered relative to the two rollers.

6. The pipe testing device according to claim 5, characterized in that, The side positioning mechanism includes a first vertical lifting assembly and a horizontal pushing assembly. The horizontal pushing assembly is disposed on the lifting component of the first vertical lifting assembly. The horizontal pushing assembly includes a horizontally movable pushing component, and the moving direction of the pushing component is parallel to the axial direction of the pipe to be tested.

7. The pipe testing device according to claim 1, characterized in that, The external wall visual inspection element includes an external wall inspection industrial camera and an external wall inspection light source, with the external wall inspection light source located on both sides below the external wall inspection industrial camera.

8. The pipe testing device according to claim 7, characterized in that, The external wall detection industrial camera and the external wall detection light source are mounted on the same bracket; The outer wall inspection frame is provided with a second horizontal moving component and a second vertical lifting component. The movement direction of the second horizontal moving component is parallel to the axis of the roller. The second vertical lifting component is located on the moving part of the second horizontal moving component. The bracket is connected to the lifting part of the second vertical lifting component.

9. The pipe testing device according to claim 1, characterized in that, The inner wall inspection frame is equipped with a third horizontal moving component and a third vertical lifting component. The movement direction of the third horizontal moving component is parallel to the axis of the roller. The third horizontal moving component is located on the lifting part of the third vertical lifting component. The inner wall visual inspection element includes an inner wall inspection miniature industrial camera, which is mounted on the moving part of the third horizontal moving assembly. Driven by the third horizontal moving assembly, the camera extends into or out of the pipe to be inspected along the axial direction of the pipe to be inspected.

10. The pipe testing device according to claim 9, characterized in that, The inner wall detection miniature industrial camera is symmetrically arranged in two locations, corresponding one-to-one with the two ends of the pipe to be detected, and the third horizontal moving component is correspondingly arranged in two locations.

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