A steel tube flaw detection and pressing conveying device

Abstract

The utility model discloses a kind of steel pipe flaw detection compression conveying devices, it is related to the field of centering conveying of steel pipe, including No. 1 shell, the one end of No. 1 shell is equipped with No. 2 shell, inside No. 1 shell is equipped with No. 1 cylinder up and down, No. 1 cylinder is connected with No. 1 centering mechanism, the front end of No. 1 shell is equipped with No. 1 fixed ear up and down position, the piston rod end portion fixed connection of No. 1 fixed ear with No. 1 cylinder, the front end plate of No. 1 shell and No. 2 shell, rear end plate center place is equipped with the central hole for pipe to wear out;The upper rotary arm is rotatably installed in the upper portion of both ends of No. 2 shell.This utility model can realize centering clamping to both ends and both sides of center place of steel pipe by setting No. 1 centering mechanism, No. 2 centering mechanism and rotating mechanism and clamping mechanism, realize centering support effect, and can realize the axial conveying of steel pipe by the conveying of rotating mechanism and clamping mechanism.

Description

Technical Field

[0001] This utility model relates to the field of centering and conveying of steel pipes, specifically a steel pipe flaw detection and pressing conveying device. Background Technology

[0002] During the flaw detection process of steel pipes, it is necessary to move the steel pipe while conducting the flaw detection. In the existing technology, a thrust is generally applied to one end of the steel pipe to achieve the purpose of moving the steel pipe. In this way, during the movement of the steel pipe, the steel pipe with a larger diameter is prone to deformation due to its own stress when the support point is far away. Utility Model Content

[0003] The purpose of this utility model is to provide a steel pipe flaw detection and pressing conveying device in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a steel pipe flaw detection and pressing conveying device, comprising a first outer shell, a second outer shell installed at one end of the first outer shell, a first cylinder installed both above and below the interior of the first outer shell, the first cylinder being connected to a first centering mechanism, a first fixing ear installed at both the upper and lower positions of the front end of the first outer shell, the first fixing ear being fixedly connected to the piston rod end of the first cylinder, and a central hole for the pipe to pass through being opened at the center of the front and rear plates of the first and second outer shells; Upper rotating arms are rotatably mounted on the upper ends of the second outer shell, and lower rotating arms are rotatably mounted on the lower ends of the second outer shell. The upper and lower rotating arms are symmetrically distributed about the transverse central axis of the second outer shell. A rotating mechanism is mounted on one horizontal bar of the upper rotating arm, and a conveying mechanism is mounted on the vertical bar of the upper and lower rotating arms. A clamping mechanism is mounted on the inner side of the vertical bar of the upper and lower rotating arms. A second cylinder is mounted on both the upper and lower sides inside the second outer shell. The second cylinder is connected to a second centering mechanism. A second fixing ear is mounted on both the upper and lower front ends of the second outer shell. The second fixing ear is fixedly connected to the piston rod end of the second cylinder.

[0005] As a further embodiment of this utility model: the rotating mechanism includes a drive wheel coaxially arranged with the rotation point of the upper rotating arm, the drive wheel being rotatably connected to the upper rotating arm, a tension wheel being rotatably mounted on the crossbar of the upper rotating arm, and the drive wheel and the tension wheel being connected to a driven wheel via a transmission belt; The conveying mechanism includes an upper conveying wheel coaxially connected to the driven wheel. A support sleeve is rotatably mounted on the outer wall of the synchronous shaft connected to the driven wheel and the upper conveying wheel. The support sleeve is fixedly connected to the bottom end of the longitudinal rod of the upper rotating arm. The conveying mechanism also includes another support sleeve fixedly connected to the top end of the longitudinal rod of the lower rotating arm. The inner wall of the support sleeve is rotatably connected to the rotating shaft of the lower conveying wheel through a bearing. The lower conveying wheel and the upper conveying wheel are symmetrically distributed vertically. A crank handle is fixedly installed at one end of the rotating shaft of the lower conveying wheel.

[0006] As a further embodiment of this utility model: the clamping mechanism includes an upper rotating component fixedly connected to the inner side of the upper rotating arm's longitudinal rod portion, and a lower rotating component fixedly connected to the inner side of the lower rotating arm's longitudinal rod portion, with the top of the piston rod of the hydraulic push cylinder and the bottom of the outer casing respectively rotatably connected to the upper rotating component and the lower rotating component.

[0007] As a further embodiment of this utility model: the first centering mechanism includes a first fixing plate fixedly installed on the outer side of the first cylinder liner shell by a fixing member; a first sliding frame fixedly installed between the upper and lower sets of the first fixing plates; a first sliding sleeve fixedly installed between the two first sliding frames; a first hollow cylinder integrally formed at the center of the first sliding frame and aligned with the center hole; a first guide shaft fixedly installed between the front and rear end plates of the first shell; the first guide shaft inserted into the inner wall of the first sliding sleeve; one end of the first sliding sleeve extending through to the outside of the front first sliding frame; and a first rotating lug protruding outwardly welded to the outer periphery of the first sliding sleeve at the front first sliding frame.

[0008] As a further embodiment of this utility model: the first centering mechanism further includes a first rotating plate rotatably mounted on the outside of the first rotating ear, the first rotating plate extending through to the outside of the first outer shell, the first outer shell having a slot for the first rotating plate to pass through, a first rotating frame rotatably mounted at the end of the first rotating plate away from the first rotating ear, a first centering roller rotatably mounted at the output end of the first rotating frame, the inner side of the middle position of the first rotating frame being rotatably connected to the first center ear, the first center ear being fixedly mounted at the front end of the first outer shell, and the three first centering rollers being equidistantly distributed in the circumferential direction with the central hole as the center.

[0009] As a further embodiment of this utility model: the second centering mechanism includes a second fixing plate fixedly installed on the outer side of the outer shell of the second cylinder liner by a fixing member; a second sliding frame is fixedly installed between the upper and lower sets of the second fixing plates; a second sliding sleeve is fixedly installed between the two second sliding frames; a second hollow cylinder is integrally formed at the center of the second sliding frame, which is aligned with the center hole; a second guide shaft is fixedly installed between the front and rear end plates of the second outer shell; the second guide shaft is inserted into the inner wall of the second sliding sleeve; one end of the second sliding sleeve extends through to the outside of the front second sliding frame; and a second rotating lug protruding outward is welded to the outer periphery of the second sliding sleeve at the front second sliding frame.

[0010] As a further embodiment of this utility model: the second centering mechanism further includes a second rotating plate rotatably mounted on the outside of the second rotating ear, the second rotating plate extending through to the outside of the second outer shell, the second outer shell having another slot for the second rotating plate to pass through, a second rotating frame rotatably mounted on the end of the second rotating plate away from the second rotating ear, a second centering roller rotatably mounted on the output end of the second rotating frame, the inner side of the middle position of the second rotating frame rotatably connected to the second center ear, the second center ear being fixedly mounted on the front end of the second outer shell, and the three second centering rollers being equidistantly distributed in the circumferential direction with the central hole as the center.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up a first centering mechanism, a second centering mechanism, a rotating mechanism, and a clamping mechanism, the two ends and the two sides of the center of the steel pipe can be centered and clamped to achieve the centering support effect. The steel pipe can be axially transported through the rotating mechanism and the clamping mechanism. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the installation of the No. 1 fixing ear of this utility model; Figure 3 This is a schematic diagram showing the opening of the central hole in this utility model; Figure 4 This is a schematic diagram of the sliding installation of the first guide shaft of this utility model; Figure 5 This is a schematic diagram of the No. 1 centering mechanism of this utility model; Figure 6 This is a schematic diagram of the installation of the conveying mechanism of this utility model; Figure 7 This is a schematic diagram of the installation of the clamping mechanism of this utility model; Figure 8 This is a schematic diagram of the installation of the hydraulic pusher cylinder of this utility model; Figure 9 This is a schematic diagram of the installation of the No. 2 centering mechanism of this utility model.

[0013] In the diagram: 1. Outer shell No. 1; 2. Outer shell No. 2; 3. Upper rotating arm; 4. Lower rotating arm; 5. Driving wheel; 6. Tensioning wheel; 7. Driven wheel; 8. Groove; 9. Fixed ear No. 1; 10. Cylinder No. 1; 11. Center hole; 12. Fixed plate No. 1; 13. Sliding frame No. 1; 14. Sliding sleeve No. 1; 15. Guide shaft No. 1; 16. Rotating ear No. 1; 17. Rotating plate No. 1; 18. Center ear No. 1; 19. Rotating frame No. 1; 20. Fixed... 21. Core roller; 22. Drive belt; 23. Upper conveyor wheel; 24. Lower conveyor wheel; 25. Handle; 26. Hydraulic push cylinder; 27. Upper rotating component; 28. Lower rotating component; 29. ​​No. 2 cylinder; 30. No. 2 fixed ear; 31. No. 2 fixed plate; 32. No. 2 sliding frame; 33. No. 2 sliding sleeve; 34. No. 2 guide shaft; 35. No. 2 rotating ear; 36. No. 2 center ear; 37. No. 2 rotating frame; 38. No. 2 centering roller. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-9 In this embodiment of the utility model, a steel pipe flaw detection and pressing conveying device includes a first outer shell 1, a second outer shell 2 installed at one end of the first outer shell 1, a first cylinder 10 installed both above and below inside the first outer shell 1, the first cylinder 10 being connected to a first centering mechanism, a first fixing ear 9 installed at the upper and lower positions of the front end of the first outer shell 1, the first fixing ear 9 being fixedly connected to the piston rod end of the first cylinder 10, and a central hole 11 for the pipe to pass through being opened at the center of the front and rear plates of the first outer shell 1 and the second outer shell 2; upper rotating arms 3 are rotatably installed above both ends of the second outer shell 2, and the two sides of the second outer shell 2... A lower rotating arm 4 is rotatably mounted below the end. The upper rotating arm 3 and the lower rotating arm 4 are symmetrically distributed vertically about the transverse central axis of the second outer shell 2. A rotating mechanism is mounted on one of the horizontal bars of the upper rotating arm 3. A conveying mechanism is mounted on the vertical bars of the upper rotating arm 3 and the lower rotating arm 4. A clamping mechanism is mounted on the inner side of the vertical bars of the upper rotating arm 3 and the lower rotating arm 4. A second cylinder 28 is mounted both vertically inside the second outer shell 2. The second cylinder 28 is connected to the second centering mechanism. A second fixing ear 29 is mounted both vertically at the front end of the second outer shell 2. The second fixing ear 29 is fixedly connected to the piston rod end of the second cylinder 28.

[0016] In this embodiment: After the steel pipe being tested passes through the central hole 11 of the first outer shell 1 and the second outer shell 2, the first centering mechanism and the second centering mechanism are activated. The first centering mechanism and the second centering mechanism rotate synchronously inward. The synchronously rotating first centering mechanism and the second centering mechanism clamp the outer surface of the steel pipe, completing the centering and clamping of the steel pipe. After the steel pipe is clamped by the first centering mechanism and the second centering mechanism, the clamping mechanism is activated. The clamping mechanism pulls the upper rotating arm 3 and the lower rotating arm 4 to rotate in opposite directions. The upper rotating arm 3 and the lower rotating arm 4 rotate in opposite directions, driving the two parts of the conveying mechanism to clamp the upper and lower positions of the outer wall of the steel pipe. After the steel pipe is clamped, the rotating device (such as a motor) connected to the rotating mechanism is activated. The rotating mechanism can drive the conveying mechanism to rotate, thereby driving the clamped steel pipe to move. This achieves the purpose of driving the steel pipe to move after centering and clamping. The end of the steel pipe is limited, avoiding the bending problem caused by the weight of the long steel pipe.

[0017] Please refer to this carefully. Figure 1 , Figure 5 and Figure 6 The rotating mechanism includes a drive wheel 5 coaxially arranged with the rotation point of the upper rotating arm 3. The drive wheel 5 is rotatably connected to the upper rotating arm 3. A tension wheel 6 is rotatably mounted on the crossbar of the upper rotating arm 3. The drive wheel 5 and the tension wheel 6 are connected to the driven wheel 7 via a transmission belt 21. The conveying mechanism includes an upper conveying wheel 22 coaxially connected to the driven wheel 7. A support sleeve is rotatably mounted on the outer wall of the synchronous shaft connected to the driven wheel 7 and the upper conveying wheel 22. The support sleeve is fixedly connected to the bottom end of the longitudinal rod of the upper rotating arm 3. The conveying mechanism also includes another support sleeve fixedly connected to the top end of the longitudinal rod of the lower rotating arm 4. The inner wall of the support sleeve is rotatably connected to the rotating shaft of the lower conveying wheel 23 through a bearing. The lower conveying wheel 23 and the upper conveying wheel 22 are symmetrically distributed vertically. A crank 24 is fixedly mounted on one end of the rotating shaft of the lower conveying wheel 23. The clamping mechanism includes an upper rotating member 26 fixedly connected to the inner side of the longitudinal rod of the upper rotating arm 3, and a lower rotating member 27 fixedly connected to the inner side of the longitudinal rod of the lower rotating arm 4. The top of the piston rod of the hydraulic push cylinder 25 and the bottom of the housing are respectively rotatably connected to the upper rotating member 26 and the lower rotating member 27.

[0018] In this embodiment: after the steel pipe is clamped by the centering mechanism, the rotating device connected to the driving wheel 5 is started. The driving wheel 5 drives the driven wheel 7 to rotate through the transmission belt 21 and the tension wheel 6. The rotation of the driven wheel 7 drives the upper conveyor wheel 22 to rotate through the synchronous shaft. The rotating upper conveyor wheel 22 drives the steel pipe to move. At this time, the lower conveyor wheel 23 rotates under friction, thus completing the conveying of the steel pipe. When determining whether the upper conveyor wheel 22 and the lower conveyor wheel 23 have clamped the steel pipe, you can crank the handle 24. The handle 24 will drive the lower conveyor wheel 23 to rotate. Observe whether the steel pipe moves. If it can move, it means that the steel pipe has been effectively clamped. When the upper rotating arm 3 and the lower rotating arm 4 are driven to rotate in opposite directions, the piston rod of the hydraulic push cylinder 25 is retracted by activating the hydraulic push cylinder 25, and its overall length becomes shorter. Since the upper and lower ends of the hydraulic push cylinder 25 are rotatably connected to the upper rotating arm 3 and the lower rotating arm 4 through the upper rotating part 26 and the lower rotating part 27 respectively, the hydraulic push cylinder 25 synchronously pulls the upper rotating arm 3 and the lower rotating arm 4 to rotate in opposite directions. When the hydraulic push cylinder 25 extends, it drives the upper rotating arm 3 and the lower rotating arm 4 to rotate in opposite directions, thereby separating the clamping mechanism from the surface of the steel pipe.

[0019] Please refer to this carefully. Figure 5 The first centering mechanism includes a first fixing plate 12 fixedly installed on the outer side of the sleeve shell of the first cylinder 10 via fasteners. A first sliding frame 13 is fixedly installed between the upper and lower sets of first fixing plates 12. A first sliding sleeve 14 is fixedly installed between the two first sliding frames 13. A first hollow cylinder aligned with the center hole 11 is integrally formed at the center of the first sliding frame 13. A first guide shaft 15 is fixedly installed between the front and rear end plates of the first shell 1. The first guide shaft 15 is inserted into the inner wall of the first sliding sleeve 14. One end of the first sliding sleeve 14 extends through to the outside of the front first sliding frame 13. The outer periphery of the first sliding sleeve 14 is welded to the front first sliding frame 13. The first rotating ear 16 protrudes outward. The first centering mechanism also includes a first rotating plate 17 rotatably mounted on the outside of the first rotating ear 16. The first rotating plate 17 extends through to the outside of the first outer shell 1. The first outer shell 1 has a slot 8 for the first rotating plate 17 to pass through. A first rotating frame 19 is rotatably mounted on the end of the first rotating plate 17 away from the first rotating ear 16. A first centering roller 20 is rotatably mounted on the output end of the first rotating frame 19. The inner side of the middle position of the first rotating frame 19 is rotatably connected to the first center ear 18. The first center ear 18 is fixedly mounted on the front end of the first outer shell 1. The three first centering rollers 20 are equidistantly distributed in the circumferential direction with the center hole 11 as the center.

[0020] In this embodiment: when centering and clamping the front end of the steel pipe, the No. 1 cylinder 10 is activated and shortened. Since the piston rod of the No. 1 cylinder 10 is fixed, the thrust generated by the shortened No. 1 cylinder 10 causes the sleeve shell of the No. 1 cylinder 10 to move towards the No. 1 fixed ear 9. This drives the two No. 1 sliding frames 13 to move through the No. 1 fixed plate 12. The No. 1 sliding frame 13 then drives the No. 1 sliding sleeve 14 to slide along the outer wall of the No. 1 guide shaft 15. When the No. 1 sliding sleeve 14 moves, the moving No. 1 sliding sleeve 14 pushes the No. 1 rotating plate 17 to move synchronously through the No. 1 rotating ear 16. At this time, the other end of the No. 1 rotating plate 17 pushes the No. 1 rotating frame 19. The No. 1 rotating frame 19 rotates upward around the rotatable connection point with the No. 1 center ear 18. At this time, the No. 1 rotating frame 19 can push the No. 1 centering roller 20 close to the surface of the steel pipe until the steel pipe is clamped, realizing the clamping function of the No. 1 positioning mechanism.

[0021] Please refer to this carefully. Figure 9 The second centering mechanism includes a second fixing plate 30 fixedly installed on the outer side of the sleeve shell of the second cylinder 28 by a fastener. A second sliding frame 31 is fixedly installed between the upper and lower sets of second fixing plates 30. A second sliding sleeve 32 is fixedly installed between the two second sliding frames 31. A second hollow cylinder aligned with the center hole 11 is integrally formed at the center of the second sliding frame 31. A second guide shaft 33 is fixedly installed between the front and rear end plates of the second shell 2. The second guide shaft 33 is inserted into the inner wall of the second sliding sleeve 32. One end of the second sliding sleeve 32 extends through to the outside of the front second sliding frame 31. The outer periphery of the second sliding sleeve 32 is welded to the front second sliding frame 31 with outward-facing... The prominent second rotating ear 34 and the second centering mechanism also include a second rotating plate 35 rotatably mounted on the outside of the second rotating ear 34. The second rotating plate 35 extends through to the outside of the second outer shell 2. The second outer shell 2 has another slot 8 for the second rotating plate 35 to pass through. A second rotating frame 37 is rotatably mounted on the end of the second rotating plate 35 away from the second rotating ear 34. A second centering roller 38 is rotatably mounted on the output end of the second rotating frame 37. The inner side of the middle position of the second rotating frame 37 is rotatably connected to the second center ear 36. The second center ear 36 is fixedly mounted on the front end of the second outer shell 2. The three second centering rollers 38 are equidistantly distributed in the circumferential direction with the center hole 11 as the center.

[0022] In this embodiment: when centering and clamping the middle section of the steel pipe, the second cylinder 28 is activated and shortened. Since the piston rod of the second cylinder 28 is fixed, the thrust generated by the shortened cylinder 28 causes the sleeve shell of the second cylinder 28 to move towards the second fixed plate 30. This drives the two second sliding frames 31 to move through the second fixed plate 30. The second sliding frame 31 then drives the second sliding sleeve 32 to slide along the outer wall of the second guide shaft 33. When the second sliding sleeve 32 moves, it pushes the second rotating plate 35 to move synchronously through the second rotating ear 34. At this time, the other end of the second rotating plate 35 pushes the second rotating frame 37. The second rotating frame 37 rotates upward around the rotating connection point with the second center ear 36. At this time, the second rotating frame 37 can push the second centering roller 38 close to the surface of the steel pipe until the steel pipe is clamped, realizing the clamping function of the second positioning mechanism.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A steel pipe flaw detection and clamping conveying device, comprising a first outer shell (1), wherein a second outer shell (2) is installed at one end of the first outer shell (1), characterized in that, The first outer shell (1) is equipped with a cylinder (10) at both the top and bottom. The cylinder (10) is connected to the centering mechanism. The front end of the first outer shell (1) is equipped with a fixing ear (9) at both the top and bottom. The fixing ear (9) is fixedly connected to the piston rod end of the cylinder (10). The front end plate and rear end plate of the first outer shell (1) and the second outer shell (2) are provided with a central hole (11) for the pipe to pass through. Upper rotating arms (3) are rotatably mounted on the upper ends of the second outer shell (2), and lower rotating arms (4) are rotatably mounted on the lower ends of the second outer shell (2). The upper rotating arms (3) and the lower rotating arms (4) are symmetrically distributed about the transverse central axis of the second outer shell (2). A rotating mechanism is mounted on one horizontal bar of the upper rotating arm (3). A conveying mechanism is mounted on the vertical bar of the upper rotating arm (3) and the lower rotating arm (4). A clamping mechanism is mounted on the inner side of the vertical bar of the upper rotating arm (3) and the lower rotating arm (4). A second cylinder (28) is mounted on both the upper and lower sides inside the second outer shell (2). The second cylinder (28) is connected to the second centering mechanism. A second fixing ear (29) is mounted on both the upper and lower front ends of the second outer shell (2). The second fixing ear (29) is fixedly connected to the piston rod end of the second cylinder (28).

2. The steel pipe flaw detection and pressing conveying device according to claim 1, characterized in that, The rotating mechanism includes a drive wheel (5) coaxially arranged with the rotation point of the upper rotating arm (3). The drive wheel (5) is rotatably connected to the upper rotating arm (3). A tension wheel (6) is rotatably mounted on the crossbar of the upper rotating arm (3). The drive wheel (5) and the tension wheel (6) are connected to a driven wheel (7) via a transmission belt (21). The conveying mechanism includes an upper conveying wheel (22) coaxially connected to the driven wheel (7). A support sleeve is rotatably installed on the outer wall of the synchronous shaft connected to the driven wheel (7) and the upper conveying wheel (22). The support sleeve is fixedly connected to the bottom end of the longitudinal rod of the upper rotating arm (3). The conveying mechanism also includes another support sleeve that is fixedly connected to the top of the longitudinal rod of the lower rotating arm (4). The inner wall of the support sleeve is rotatably connected to the rotating shaft of the lower conveying wheel (23) through a bearing. The lower conveying wheel (23) and the upper conveying wheel (22) are symmetrically distributed vertically. A crank handle (24) is fixedly installed at one end of the rotating shaft of the lower conveying wheel (23).

3. The steel pipe flaw detection and pressing conveying device according to claim 2, characterized in that, The clamping mechanism includes an upper rotating member (26) fixedly connected to the inner side of the longitudinal rod of the upper rotating arm (3), and a lower rotating member (27) fixedly connected to the inner side of the longitudinal rod of the lower rotating arm (4). The top of the piston rod of the hydraulic push cylinder (25) and the bottom of the outer shell are respectively rotatably connected to the upper rotating member (26) and the lower rotating member (27).

4. The steel pipe flaw detection and pressing conveying device according to claim 1, characterized in that, The first centering mechanism includes a first fixing plate (12) fixedly installed on the outer side of the sleeve shell of the first cylinder (10) by a fixing member. A first sliding frame (13) is fixedly installed between the upper and lower sets of the first fixing plates (12). A first sliding sleeve (14) is fixedly installed between the two first sliding frames (13). A first hollow cylinder aligned with the center hole (11) is integrally formed at the center of the first sliding frame (13). A first guide shaft (15) is fixedly installed between the front and rear end plates of the first shell (1). The first guide shaft (15) is inserted into the inner wall of the first sliding sleeve (14). One end of the first sliding sleeve (14) extends through to the outside of the front first sliding frame (13). The outer periphery of the first sliding sleeve (14) is welded with an outwardly protruding first rotating ear (16) on the front first sliding frame (13).

5. The steel pipe flaw detection and pressing conveying device according to claim 4, characterized in that, The first centering mechanism also includes a first rotating plate (17) rotatably mounted on the outside of the first rotating ear (16). The first rotating plate (17) extends through to the outside of the first outer shell (1). The first outer shell (1) has a slot (8) for the first rotating plate (17) to pass through. A first rotating frame (19) is rotatably mounted on the end of the first rotating plate (17) away from the first rotating ear (16). A first centering roller (20) is rotatably mounted on the output end of the first rotating frame (19). The inner side of the middle position of the first rotating frame (19) is rotatably connected to the first center ear (18). The first center ear (18) is fixedly mounted on the front end of the first outer shell (1). The three first centering rollers (20) are equidistantly distributed in the circumferential direction with the center hole (11) as the center.

6. The steel pipe flaw detection and pressing conveying device according to claim 5, characterized in that, The second centering mechanism includes a second fixing plate (30) fixedly installed on the outer side of the sleeve shell of the second cylinder (28) by a fixing member. A second sliding frame (31) is fixedly installed between the upper and lower sets of the second fixing plates (30). A second sliding sleeve (32) is fixedly installed between the two second sliding frames (31). A second hollow cylinder aligned with the center hole (11) is integrally formed at the center of the second sliding frame (31). A second guide shaft (33) is fixedly installed between the front and rear end plates of the second shell (2). The second guide shaft (33) is inserted into the inner wall of the second sliding sleeve (32). One end of the second sliding sleeve (32) extends through to the outside of the front second sliding frame (31). The outer periphery of the second sliding sleeve (32) is welded with an outwardly protruding second rotating ear (34) on the front second sliding frame (31).

7. The steel pipe flaw detection and pressing conveying device according to claim 6, characterized in that, The second centering mechanism also includes a second rotating plate (35) rotatably mounted on the outside of the second rotating ear (34). The second rotating plate (35) extends through to the outside of the second outer shell (2). The second outer shell (2) has another slot (8) for the second rotating plate (35) to pass through. A second rotating frame (37) is rotatably mounted on the end of the second rotating plate (35) away from the second rotating ear (34). A second centering roller (38) is rotatably mounted on the output end of the second rotating frame (37). The inner side of the middle position of the second rotating frame (37) is rotatably connected to the second center ear (36). The second center ear (36) is fixedly mounted on the front end of the second outer shell (2). The three second centering rollers (38) are equidistantly distributed in the circumferential direction with the center hole (11) as the center.

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