Circulating auxiliary flaw detection device and method for multiple pipelines

Abstract

The invention relates to a multi-pipeline circulating auxiliary flaw detection device and method, and relates to the technical field of pipeline flaw detection, the multi-pipeline circulating auxiliary flaw detection device comprises a platform, a right support and a left support which are respectively mounted at two ends of the top surface of the platform, and a connecting rod for connecting the right support and the left support; the right support comprises a right support plate arranged on the platform, a right driving wheel arranged on the right support plate and a right rotating wheel arranged on the right driving wheel, the left support comprises a left support plate arranged on the platform, a left driving wheel arranged on the left support plate and a left rotating wheel arranged on the left driving wheel, and the two ends of the connecting rod penetrate through the right rotating wheel and the left rotating wheel at the same time. The right rotating wheel and the left rotating wheel are provided with pipe holes used for installing pipelines, and the pipelines can be rotated by rotating the left rotating wheel and the right rotating wheel. The radiographic inspection requirement can be met, the counterweight procedure is omitted, the manufacturing period is shortened, the cost is reduced, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline flaw detection, and in particular to a multi-pipeline circulating auxiliary flaw detection device and method. Background Art

[0002] With the improvement of the parameters of ultra-supercritical and supercritical boilers, the material grade of the pipe materials and the wall thickness values of the pipes in the boilers are also gradually increasing. In view of the current situation, before the ray flaw detection of the 90-degree elbow pipe girth weld, it is necessary to install a temporary counterweight at the other end (non-elbow end) of the pipe. The counterweight is connected and fixed to the pipe through a C-type clamp. Then, the elbow and the counterweight are placed on the electric roller rack together, and the pipe is driven to rotate by the electric roller rack to realize the ray flaw detection operation at different positions of the pipe splicing girth weld (the girth weld between the elbow and the straight section of the pipe body).

[0003] Adopting this method, when the applied counterweight is too heavy or too light, it will cause the pipe to rotate smoothly or slip on the roller rack, and it is only necessary to readjust the counterweight mass, which affects the ray flaw detection of the pipe splicing girth weld, resulting in a long manufacturing cycle and high manufacturing cost of the product pipe, and is not conducive to workshop production and manufacturing. Moreover, adopting this method for operating personnel, the C-type clamp is extremely easy to break, resulting in the instantaneous overturning of the pipe, posing a high safety risk to the hook personnel and non-destructive flaw detection personnel in the workshop. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-pipeline circulating auxiliary flaw detection device and method, which can meet the flaw detection requirements, optimize the manufacturing process, reduce costs, and eliminate potential safety hazards by automatically clamping, rotating, and releasing the pipeline.

[0005] To achieve the above object, the technical solution of the present invention provides a multi-pipeline circulating auxiliary flaw detection device, including a platform, a right support and a left support respectively installed at both ends of the top surface of the platform, and a connecting rod connecting the right support and the left support; the right support includes a right support plate provided on the platform, a right driving wheel provided on the right support plate, and a right rotating wheel provided on the right driving wheel, the left support includes a left support plate provided on the platform, a left driving wheel provided on the left support plate, and a left rotating wheel provided on the left driving wheel. Both ends of the connecting rod pass through the right rotating wheel and the left rotating wheel at the same time, and the right rotating wheel and the left rotating wheel are provided with pipe holes for installing the pipeline, and the pipeline can be rotated by rotating the left rotating wheel and the right rotating wheel.

[0006] Preferably, the right support plate and the left support plate are provided with grooves for accommodating the right rotating wheel and the left rotating wheel.

[0007] Preferably, both the right support plate and the left support plate are provided in two and are arranged at intervals, and a plurality of the right driving wheels and the left driving wheels are respectively installed.

[0008] Preferably, convex teeth are provided in the middle axially of both the right drive wheel and the left drive wheel, and convex teeth for corresponding engagement are provided in the middle axially of both the right rotating wheel and the left rotating wheel; rings are provided at both ends of the right drive wheel and the left drive wheel respectively, and rings for corresponding rolling contact are provided at both ends of the right rotating wheel and the left rotating wheel respectively.

[0009] Preferably, the right rotating wheel and the left rotating wheel are respectively provided with a plurality of pipe holes, and each pipe hole is distributed with clamping claws for clamping a pipeline.

[0010] Preferably, both the right rotating wheel and the left rotating wheel are provided with small pipe holes at the upper and lower positions of the center and large pipe holes at the left and right positions of the center.

[0011] Preferably, four small clamping claws are correspondingly distributed in the small pipe holes, and four large clamping claws are correspondingly distributed in the large pipe holes.

[0012] Preferably, a remote control device is further provided for controlling the right drive wheel and the left drive wheel to rotate clockwise or counterclockwise simultaneously, and for controlling the clamping claws to clamp or release simultaneously.

[0013] Preferably, both ends of the connecting rod pass through the right rotating wheel and the left rotating wheel respectively and are detachably connected to a cross plate.

[0014] The technical solution of the present invention further provides a method for cyclic auxiliary flaw detection of multiple pipelines, including the following steps:

[0015] Clamp and fix a single 90-degree elbow pipeline in the corresponding pipe holes of the right rotating wheel and the left rotating wheel, and clamp the pipeline with the 90-degree elbow facing upward;

[0016] Irradiate the circumferential weld with a radiation source at the X-direction position to complete the first radiation irradiation operation in the X-direction position;

[0017] Control the left drive wheel and the right drive wheel to rotate through the remote control device, drive the left rotating wheel and the right rotating wheel to rotate counterclockwise by 90 degrees and then stop immediately, so that the pipeline rotates by 90 degrees;

[0018] Irradiate the circumferential weld with a radiation source at the Y-direction position to complete the second radiation irradiation operation in the Y-direction position;

[0019] Control the left drive wheel and the right drive wheel to rotate again through the remote control device, so that the left rotating wheel and the right rotating wheel further rotate counterclockwise by 90 degrees and then stop immediately, and the pipeline rotates accordingly by 90 degrees;

[0020] Irradiate the circumferential weld with a radiation source at the Z-direction position to complete the third radiation irradiation operation in the Z-direction position;

[0021] Thus, ray irradiation of the circumferential weld between the 90-degree elbow and the pipeline body is realized in the three position directions of X, Y, and Z, and the ray flaw detection operation of the entire circumferential weld is completed.

[0022] The present invention has the following beneficial effects compared with the prior art:

[0023] The present invention provides a multi-pipeline circulating auxiliary flaw detection device and method. The pipeline is placed on the equipment, and the functions of simultaneous rotation and stop of the left / right rollers are controlled through a remote control device. Through this device, the functions of automatic clamping, rotation, and automatic loosening of the product pipeline can be realized, meeting the requirements of ray flaw detection for the circumferential weld between the pipeline and the elbow. Compared with the prior art, by adopting this device, the process of clamping a counterweight at the tail of the pipeline can be omitted, significantly shortening the manufacturing cycle of the product, reducing the manufacturing cost of the product, and also avoiding potential safety hazards for personnel.

[0024] The device of the present invention has the advantages of simple design structure, low manufacturing cost, and convenient use. According to different pipeline specifications and dimensions, the pipeline is respectively installed in the large and small pipe holes corresponding to the rotating wheels, and the clamping and rotation of pipelines of various specifications can be realized. Therefore, the device of the present invention has high versatility and practicability, and is convenient for large-scale use in the production workshop. Description of the Drawings

[0025] Figure 1 It is the front view of a multi-pipeline circulating auxiliary flaw detection device of the present invention;

[0026] Figure 2 It is the view in the direction A of a multi-pipeline circulating auxiliary flaw detection device of the present invention;

[0027] Figure 3 It is a schematic diagram of the three ray irradiation positions in the X, Y, and Z directions that need to be completed for the 90-degree elbow pipeline of the present invention;

[0028] Figure 4 It is a schematic diagram of the first ray irradiation position in the X direction realized by the 90-degree elbow pipeline circumferential weld automatic flaw detection device of the present invention;

[0029] Figure 5 It is a schematic diagram of the second ray irradiation position in the Y direction realized by the 90-degree elbow pipeline circumferential weld automatic flaw detection device of the present invention;

[0030] Figure 6 It is a schematic diagram of the third ray irradiation position in the Z direction realized by the 90-degree elbow pipeline circumferential weld automatic flaw detection device of the present invention;

[0031] Figure 7 It is the front view showing the installation and fixation of 4 pipeline products in this device of the present invention;

[0032] Figure 8This is the B - view showing the installation and fixation of four pipeline products in this device according to the present invention;

[0033] Figure 9 This is the C - view showing the installation and fixation of four pipeline products in this device according to the present invention.

[0034] Reference numerals: 0, platform; 1, right support; 11, right support plate; 12, right driving wheel; 13, pin shaft 1; 14, right rotating wheel; 15, small pipe hole 1; 16, small claw 1; 17, large pipe hole 1; 18, large claw 1; 2, left support; 21, left support plate; 22, left driving wheel; 23, pin shaft 2; 24, left rotating wheel; 25, small pipe hole 2; 26, small claw 2; 27, large pipe hole 2; 28, large claw 2; 3, connecting rod; 4, cross plate. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] An embodiment of the present invention discloses a multi - pipeline circulating auxiliary flaw detection device, including a platform 0, a right support 1, a left support 2, a connecting rod 3, and a cross plate 4.

[0037] The present invention uses the platform 0 as the basic component. The platform 0 is made of alloy steel material, with sufficient strength and stability, capable of bearing the weight of the entire device and various acting forces generated during the flaw detection process. The right support 1 and the left support 2 are respectively installed at both ends of the top surface of the platform 0, and are connected by a connecting rod 3. The connecting rod 3 is also made of alloy steel material. One end of it passes through the right support 1. At this time, the cross plate 4 is connected to this end of the connecting rod 3. The connecting rod 3 is provided with a cross groove at this end, which is precisely matched with the slot of the cross plate 4 to achieve a firm connection; the other end of the connecting rod 3 passes through the left support 2, and a cross groove is also provided at this end, which is connected with the slot of another cross plate 4. Such a connection method is not only tightly connected but also has the advantages of quick installation and removal, providing convenience for the assembly and disassembly of the device. Further, the right support 1 and the left support 2 are also made of alloy steel material.

[0038] The right support 1 includes a right support plate 11, a right drive wheel 12, a first pin shaft 13, a right turning wheel 14, a first small pipe hole 15, a first small claw 16, a first large pipe hole 17 and a first large claw 18. The right support 1 is connected to the connecting rod 3 through the right drive wheel 12. The number of the right support plates 11 is 2, and the cross-sections of both are polygonal, with a V-shaped groove in the middle. This structure not only ensures the overall strength but also provides a suitable installation space for other components. Between the two right support plates 11, three right drive wheels 12 are respectively installed on both sides and the middle position. A first pin shaft 13 is connected between each right drive wheel 12 and the right support plate 11. The first pin shaft 13 passes through the corresponding hole positions on the right drive wheel 12 and the right support plate 11, enabling the right drive wheel 12 to be stably installed between the right support plates 11 and to rotate around the first pin shaft 13. Corresponding to the structure of the right support 1, the left support 2 includes a left support plate 21, a left drive wheel 22, a second pin shaft 23, a left turning wheel 24, a second small pipe hole 25, a second small claw 26, a second large pipe hole 27 and a second large claw 28. The left support 2 is connected to the connecting rod 3 through the left drive wheel 22. The number of the left support plates 21 is 2, and the cross-sections of both are polygonal, with a V-shaped groove in the middle. Between the two left support plates 21, three left drive wheels 22 are respectively installed on both sides and the middle position. A second pin shaft 23 is connected between the left drive wheel 22 and the left support plate 21.

[0039] Convex teeth are provided in a whole circle in the middle of the right drive wheel 12, and rings are provided at both ends of the right drive wheel 12. The structure of the right turning wheel 14 is adapted to that of the right drive wheel 12. Rings are also provided at both ends of the right turning wheel 14, and convex teeth are provided in a whole circle in the middle. The right turning wheel 14 is in meshing connection with the convex teeth of the right drive wheel 12 through the convex teeth in the middle to achieve transmission connection. The right turning wheel 14 is in rolling contact with the rings of the right drive wheel 12 through the rings at both ends to ensure the smoothness of the transmission process. The left drive wheel 22 corresponds to the structure of the right drive wheel 12. Convex teeth are provided in a whole circle in the middle of the left drive wheel 22, and rings are provided at both ends of the left drive wheel 22. The structure of the left turning wheel 24 is adapted to that of the right turning wheel 14. Rings are also provided at both ends of the left turning wheel 24, and convex teeth are provided in a whole circle in the middle. The left turning wheel 24 is in meshing connection with the convex teeth of the left drive wheel 22 through the cams in the middle, and the left turning wheel 24 is in rolling contact with the rings of the left drive wheel 22 through the rings at both ends.

[0040] The right rotating wheel 14 is centered, and there is a small pipe hole 15 at the upper and lower positions of the center. Four small claws 16 are evenly distributed around each small pipe hole 15. The small claws 16 can clamp or loosen the pipe, so as to stably install a small-diameter pipe (the diameter range of the pipe body: 200-500 mm) in the small pipe hole 15. At the same time, the right rotating wheel 14 is centered, and there is a large pipe hole 17 at the left and right positions of the center. Four large claws 18 are evenly distributed around each large pipe hole 17. The large claws 18 are used to cooperate with the installation of large-diameter pipes (the diameter range of the pipe body: 400-700 mm). By the clamping or loosening action of the large claws 18, the large-diameter pipe is stably clamped in the large pipe hole 17. The structure of the left rotating wheel 24 corresponds to that of the right rotating wheel 14. There is a small pipe hole 25 at the upper and lower positions of its center. Four small claws 26 are evenly distributed around each small pipe hole 25, which are used to clamp small-diameter pipes. The left rotating wheel 24 is provided with a large pipe hole 27 at the left and right positions of the center. Four large claws 28 are evenly distributed around each large pipe hole 27, which are used to clamp large-diameter pipes. Both the small claws 26 and the large claws 28 can clamp or loosen the pipe.

[0041] The right support 1 and the left support 2 on the platform 0, where the centers of the right rotating wheel 14 in the right support 1 and the left rotating wheel 24 in the left support 2 are at the same horizontal height to ensure the pipe remains stable during clamping and flaw detection. Moreover, the upper and lower small pipe holes 15 and the left and right large pipe holes 17 in the right rotating wheel 14 and the upper and lower small pipe holes 25 and the left and right large pipe holes 27 in the left rotating wheel 24 are respectively provided at the same angular positions, which enables the hole positions on both sides to accurately correspond during pipe clamping, facilitating the installation and fixation of the pipe. A connecting rod 3 passes through the center positions of the right rotating wheel 14 and the left rotating wheel 24, and each component is connected by welding to ensure the firmness and stability of the connection. The connecting rod 3 protrudes from the ends of the right rotating wheel 14 and the left rotating wheel 24. Cross grooves are provided at both ends of the connecting rod 3, and cross plates 4 are respectively installed at both ends. The connecting rod 3 and the cross plates 4 are set to be connected by slot matching, with the functions of quick installation and removal.

[0042] The present invention can also be equipped with a remote control device, and its control functions are as follows:

[0043] Through this remote control device, the three right driving wheels 12 in the right support 1 and the three left driving wheels 22 in the left support 2 can rotate clockwise or counterclockwise simultaneously, and the rotation speeds of the three right driving wheels 12 and the three left driving wheels 22 can also be the same, enabling the driving wheels on both sides to operate synchronously and providing stable power for the rotation of the rotating wheel. At the same time, the right rotating wheel 14 in the right support 1 and the left rotating wheel 24 in the left support 2 are in the same rotation direction and have the same rotation speed, realizing the synchronous rotation and stop of the right rotating wheel 14 and the left rotating wheel 24. That is: through this remote control device, the functions of simultaneous rotation and stop of the right rotating wheel 14 and the left rotating wheel 24 can be realized, and the rotation direction and rotation speed are all the same.

[0044] Through this remote control device, the four small claws 16 in the upper and lower small pipe holes 15 in the right rotating wheel 14 and the four small claws 26 in the upper and lower small pipe holes 25 in the left rotating wheel 24 can simultaneously perform clamping or releasing functions, facilitating the quick clamping and disassembly of small-diameter pipes. Similarly, through this remote control device, the four large claws 18 in the left and right large pipe holes 17 in the right rotating wheel 14 and the four large claws 28 in the left and right large pipe holes 27 in the left rotating wheel 24 can simultaneously perform clamping or releasing functions, meeting the clamping and disassembly requirements of large-diameter pipes.

[0045] The implementation principle of the embodiment of the present invention is as follows:

[0046] In the application scenario of the device, for the ray flaw detection operation of the circumferential weld between the 90-degree elbow and the pipe body, it is necessary to irradiate the circumferential weld in three position directions of the X direction, the Y direction, and the Z direction. In this embodiment, a single 90-degree elbow pipe can be clamped and fixed in the small pipe hole 25 at the upper center position of the left rotating wheel 24 and the small pipe hole 15 at the upper center position of the right rotating wheel 14, and the 90-degree elbow in the pipe is clamped in the upward state. At this time, the circumferential weld is irradiated with rays at the X position by the ray source, completing the first ray irradiation operation in the X position direction.

[0047] Through the remote control device in this device, the left driving wheel 22 and the right driving wheel 12 are controlled to rotate, thereby driving the left rotating wheel 24 and the right rotating wheel 14 to rotate counterclockwise by 90 degrees and then stop immediately. By controlling the rotation and stop of the left driving wheel 22 and the right driving wheel 12, the left rotating wheel 24 and the right rotating wheel 14 are in a locked state after rotating counterclockwise by 90 degrees, achieving the purpose of rotating the pipe by 90 degrees. At this time, the circumferential weld is irradiated with rays at the Y position by the ray source, completing the second ray irradiation operation in the Y position direction.

[0048] Through the remote control device in this device, the left drive wheel 22 and the right drive wheel 12 are controlled to rotate, so that the left turning wheel 24 and the right turning wheel 14 further rotate counterclockwise by 90 degrees and then stop immediately. Similarly, relying on the rotation and stop control of the left drive wheel 22 and the right drive wheel 12, the left turning wheel 24 and the right turning wheel 14 rotate 90 degrees again and lock, and the pipeline also rotates 90 degrees accordingly. At this time, the circumferential weld is irradiated with rays by the ray source at the Z-direction position, and the 3rd ray irradiation operation in the Z-direction position is completed.

[0049] The device of the present invention drives the product pipeline to rotate counterclockwise twice by 90 degrees through the left turning wheel 24 and the right turning wheel 14, so as to realize the ray irradiation of the circumferential weld of the 90-degree elbow and the pipeline body at three position directions of the X-direction, the Y-direction and the Z-direction, and efficiently complete the ray flaw detection operation of the whole circumferential weld. Its structural design is reasonable, and each component works together, providing stable and convenient auxiliary support for pipeline flaw detection.

[0050] Specifically, the usage steps of the present invention are as follows:

[0051] 1. Clean each component in the device of the present invention. Through the remote control device in this device, control the left drive wheel 22 and the right drive wheel 12 to rotate, so that the left turning wheel 24 and the right turning wheel 14 rotate counterclockwise by a certain angle and then stop immediately. That is: by controlling the rotation and stop functions of the left drive wheel 22 and the right drive wheel 12, the left turning wheel 24 and the right turning wheel 14 rotate counterclockwise by a certain angle and then stop immediately, and are in a locked state in this position state, testing the stability and reliability of the testing mechanism;

[0052] 2. According to the outer diameter specification size of the pipeline, select two 90-degree elbow pipes with smaller specifications. Pass one pipe through the small pipe hole 15 in the right support 1, pass through the small pipe hole 15 in the left support 2, and through the remote control device in this device, and control the small claw to clamp the 90-degree elbow in the pipe in an upward state; pass the other pipe through the small pipe hole 25 in the left support 2, pass through the small pipe hole 25 in the right support 1, and through the remote control device in this device, and control the small claw to clamp the 90-degree elbow in the pipe in a downward state. The purpose is to arrange the two 90-degree elbows symmetrically upward and downward respectively to offset the pipeline rotation eccentric torque mutually;

[0053] 3. Select two 90-degree elbow pipes with larger specifications according to the outer diameter specifications of the pipeline. Pass one pipe through the large pipe hole 1-17 in the right support 1 and through the large pipe hole 2-27 in the left support 2. Through the remote control device in this device, control the large claw to clamp the 90-degree elbow in the pipeline in a horizontal inward state; pass the other pipe through the large pipe hole 2-27 in the left support 2 and through the large pipe hole 2-27 in the right support 1. Through the remote control device in this device, control the large claw to clamp the 90-degree elbow in the pipeline in a horizontal outward state. The purpose is to offset the pipeline rotation eccentric moment by arranging two 90-degree elbows symmetrically inward and outward respectively.

[0054] 4. Through the remote control device in this device, according to the implementation principle, after the left rotation wheel 24 and the right rotation wheel 14 drive the product pipeline to rotate counterclockwise by 90 degrees each time as set by this device, realize the butt weld of the 4 pipeline elbows and the pipeline body in this device, and perform ray irradiation on the butt weld in the three position directions of X, Y, and Z to complete the ray flaw detection operation of the butt weld of the 4 pipeline elbows and the pipeline body in this device; through the cross grooves at both ends of the connecting rod 3, install cross plates 4 at both ends of the connecting rod 3 respectively. The cross plates 4 are processed from lead steel plates, and the steel plates are distributed in a cross shape and are set to be welded and fixed. Due to the ray isolation function of the cross plates 4, when the butt weld of the 4 pipeline elbows and the body in this device is irradiated by rays, there will be no mutual influence or interference phenomenon.

[0055] 5. After all the ray flaw detections of the 4 pipeline butt welds in this device are completed, through the remote control device in this device, when the position state is in the locked state, control to release the large claw / small claw at the lowest position of the release device, and with the help of a crane, lift one of the product pipelines; secondly, through the remote control device in this device, rotate the left rotation wheel 24 and the right rotation wheel 14 by 180 degrees and then stop immediately. When the position state is in the locked state, control to release the large claw / small claw at the lowest position of the current device, and with the help of a crane, lift another product pipeline of the same specification; thirdly, through the remote control device in this device, rotate the left rotation wheel 24 and the right rotation wheel 14 by 90 degrees and then stop immediately. When the position state is in the locked state, control to release the large claw / small claw at the lowest position of the current device, and with the help of a crane, lift one of the product pipelines; finally, through the remote control device in this device, rotate the left rotation wheel 24 and the right rotation wheel 14 by 180 degrees and then stop immediately. When the position state is in the locked state, control to release the large claw / small claw at the lowest position of the current device, and with the help of a crane, lift another product pipeline of the same specification.

[0056] 6. After completing all the above operation steps, the 4 pipelines can be separated from the device of the present invention.

[0057] 7. Repeat the above operation steps to achieve the circumferential seam radiographic inspection operation for the other 4 pipes (2 groups of pipes).

[0058] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-pipe circulating auxiliary flaw detection device, characterized in that It includes a platform (0), a right support (1) and a left support (2) respectively installed at both ends of the top surface of the platform (0), and a connecting rod (3) connecting the right support (1) and the left support (2); the right support (1) includes a right support plate (11) provided on the platform (0), a right driving wheel (12) provided on the right support plate (11), and a right rotating wheel (14) provided on the right driving wheel (12), the left support (2) includes a left support plate (21) provided on the platform (0), a left driving wheel (22) provided on the left support plate (21), and a left rotating wheel (24) provided on the left driving wheel (22), both ends of the connecting rod (3) pass through the right rotating wheel (14) and the left rotating wheel (24) at the same time, and pipe holes for installing pipes are provided on the right rotating wheel (14) and the left rotating wheel (24), and the pipe can be rotated by rotating the left rotating wheel (24) and the right rotating wheel (14).

2. The multi-pipe circulation-assisted flaw detection device according to claim 1, wherein, The right support plate (11) and the left support plate (21) are provided with grooves for accommodating the right rotating wheel (14) and the left rotating wheel (24).

3. The multi-pipe circulation-assisted flaw detection device according to claim 2, characterized in that, Both the right support plate (11) and the left support plate (21) are provided in two and are arranged at intervals, and a plurality of the right driving wheels (12) and the left driving wheels (22) are respectively installed.

4. A multi-pipe circulating auxiliary flaw detection device according to claim 3, characterized in that, Convex teeth are provided in the axial middle parts of the right driving wheel (12) and the left driving wheel (22), and convex teeth for corresponding meshing are provided in the axial middle parts of the right rotating wheel (14) and the left rotating wheel (24); rings are respectively provided at both ends of the right driving wheel (12) and the left driving wheel (22), and rings for corresponding rolling contact are respectively provided at both ends of the right rotating wheel (14) and the left rotating wheel (24).

5. A multi-pipe circulating auxiliary flaw detection device according to claim 4, wherein, A plurality of pipe holes are respectively provided corresponding to the right rotating wheel (14) and the left rotating wheel (24), and clamping claws for clamping the pipe are distributed in each pipe hole.

6. The multi-pipe circulating auxiliary flaw detection device according to claim 5, characterized in that, Both the right rotating wheel (14) and the left rotating wheel (24) are provided with small pipe holes at the upper and lower positions of the center and large pipe holes at the left and right positions of the center.

7. The multi-pipe circulating auxiliary flaw detection device according to claim 6, characterized in that, Four small clamping claws are correspondingly distributed in the small pipe holes, and four large clamping claws are correspondingly distributed in the large pipe holes.

8. A multi-pipe circulation assisted flaw detection device according to any one of claims 5-7, characterized in that, A remote control device is also provided for controlling the right driving wheel (12) and the left driving wheel (22) to rotate clockwise or counterclockwise at the same time, and the clamping claws to clamp or loosen at the same time.

9. A multi-pipe circulating auxiliary flaw detection device according to claim 8, characterized in that, Both ends of the connecting rod (3) pass through the right rotating wheel (14) and the left rotating wheel (24) respectively and are detachably connected to a cross plate (4).

10. A method using the multi-pipe circulation assisted flaw detection device described in claim 9, characterized in that, It includes the following steps: Clamp and fix a single 90-degree elbow pipe in the corresponding pipe holes of the right rotating wheel (14) and the left rotating wheel (24), and clamp the 90-degree elbow in the pipe in an upward state. Irradiate the circumferential weld with rays at the X-direction position through a radiation source to complete the first ray irradiation operation in the X-direction position. Control the left driving wheel (22) and the right driving wheel (12) to rotate through the remote control device, drive the left rotating wheel (24) and the right rotating wheel (14) to rotate counterclockwise by 90 degrees and then stop immediately, so that the pipe rotates 90 degrees. Perform ray irradiation on the circumferential weld at the Y-direction position by the ray source to complete the second ray irradiation operation in the Y-direction position; Control the left driving wheel (22) and the right driving wheel (12) to rotate again through the remote control device, so that the left rotating wheel (24) and the right rotating wheel (14) further rotate counterclockwise by 90 degrees and then stop immediately, and the pipeline rotates by 90 degrees accordingly; Perform ray irradiation on the circumferential weld at the Z-direction position by the ray source to complete the third ray irradiation operation in the Z-direction position; Thereby, realize ray irradiation on the circumferential weld of the 90-degree elbow and the pipeline body in the three position directions of X, Y, and Z, and complete the ray flaw detection operation of the entire circumferential weld.

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