Welding seam detection device for welding steel pipe

Abstract

The invention relates to the technical field of welding seam detection, in particular to a welding seam detection device for welding a steel pipe, which comprises a working table, a transmitter and a receiving plate, and is characterized in that the working table is provided with the moving part for driving the transmitter to move; a hollowed-out hole is formed in the center of the workbench, and the bearing pieces for centering and bearing the steel pipe are arranged on the left side and the right side in the hollowed-out hole; the positioning piece comprises a propeller, a propelling plate and an overturning assembly, the two sets of symmetrically-arranged bearing pieces are adopted for bearing the steel pipe, it is ensured that the welding seam area is completely suspended, the clamping device is prevented from shielding the ray path, the detection blind area is eliminated, and no-dead-corner detection of the welding seam is achieved; the cleaning pad on the bottom wall of the sliding frame can directly wipe the surface of the receiving plate, remove impurities such as quenching liquid residues and metal scraps, prevent the impurities from interfering with a ray receiving signal, ensure the definition and accuracy of a detection image, and complete cleaning without manual intervention.

Description

Technical Field

[0001] The present invention relates to the technical field of weld detection, in particular to a weld detection device for welded steel pipes. Background Art

[0002] The production process of welded steel pipe mainly includes raw material preparation, forming, welding, and finishing. First, the steel plate or steel strip is cut according to the required pipe diameter and wall thickness, and then formed into a pipe by curling or extrusion. Then, the pipe seam is welded together using welding technology;

[0003] The weld seam is straight. When inspecting the weld seams of steel pipes of the same diameter from the same batch, a detection device is required. Traditional inspection requires clamping and positioning the steel pipe first, which is cumbersome and time-consuming. Especially for large-diameter or long steel pipes, the clamping device easily blocks the weld area, resulting in a blind spot in the inspection.

[0004] During the detection process, impurities such as quenching liquid residue, metal debris, and oil stains are easily attached to the surface of the receiving plate, interfering with the X-ray receiving signal and causing deviation in the detection results. Summary of the Invention

[0005] Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a weld detection device for welded steel pipes.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a weld detection device for welded steel pipes, comprising a workbench, a transmitter and a receiving plate, and further comprising:

[0009] A moving part, wherein the workbench is provided with a moving part for driving the launcher to move;

[0010] The workbench is provided with a hollow hole in the center, and the left and right sides of the hollow hole are provided with bearing members for centering the steel pipe;

[0011] Positioning member, the positioning member includes a thruster, a pushing plate and a flipping component. The output end of the thruster penetrates through the front side of the workbench and is connected to the pushing plate. The pushing plate is arranged in the hollow hole. A flipping component for driving the receiving plate to flip is further arranged below the pushing plate. The flipping component includes a connecting plate, a guiding plate, a shifting block, a gear, a rack, a fixed frame, a rotating shaft and a bearing seat. A guiding plate is arranged below the pushing plate. A guiding groove is arranged below the guiding plate. One end of the upper part of the rack is provided with a shifting block inserted into the guiding groove. The lower part of the rack meshes with the gear. A fixed frame located below the bearing member is further arranged in the hollow hole. A bearing seat is rotatably arranged in the fixed frame. One end of the bearing seat is provided with a rotating shaft penetrating through the fixed frame and connected to the center of the gear. A receiving plate for receiving the rays of the transmitter is embedded in the bearing seat;

[0012] Two groups of supporting rods penetrating through the gear are further arranged in the hollow hole. The left and right sides of the supporting rods are connected to the side walls of the hollow hole;

[0013] In the horizontal direction of the hollow hole, it is divided into a reset area, a flipping area, a clamping area, a bearing area of the bearing member and a dislocation area from front to back.

[0014] In order to adjust the horizontal position and height of the emission, the present invention is improved in that the moving member includes a supporting plate, a cover body, a first motor, a worm gear, a worm, a screw rod, a sliding frame and a height adjusting member. Supporting plates are symmetrically arranged on the front and back sides of the workbench. A screw rod is rotatably arranged between the two groups of supporting plates on the left and right sides. A cover body is further arranged on one group of supporting plates. A worm and two groups of worm gears are arranged in the cover body. The worm meshes with the two groups of worm gears. The output end of the first motor penetrates through the cover body and is connected to the worm. The screw rod penetrates through the supporting plate and the cover body and is connected to the center of the corresponding worm gear. The sliding frame is in a U shape. The top wall and the bottom wall of the sliding frame are respectively located on the upper and lower sides of the workbench. A screw hole adapted to the screw rod is further arranged on the top wall of the sliding frame. A height adjusting member for driving the transmitter to lift is further arranged on the top wall of the sliding frame.

[0015] Preferably, the height adjusting member includes a lifter and a lifting plate. The output end of the lifter penetrates through the top wall of the sliding frame and is connected to the lifting plate. The transmitter is arranged below the lifting plate.

[0016] In order to facilitate the wiping of the receiving plate, the present invention is improved in that the side wall of the sliding frame is arranged on one side of the workbench. A cleaning pad is further arranged above the bottom wall of the sliding frame. Legs are arranged at the four corners below the workbench. When the pushing plate is in the reset area, the receiving plate is horizontally downward and protrudes from the bottom wall of the workbench. The cleaning pad can wipe the receiving plate.

[0017] In order to facilitate and stably support the steel pipe, the present invention has been improved in that the bearing member includes a bearing frame, a roller frame and a support roller, the bearing frame is connected to the side wall of the hollow hole, the bearing frame is provided with the roller frame on the side close to the center of the hollow hole, and the roller frame is also provided with a support roller for carrying the material, and a gap is provided between the two groups of support rollers on the left and right sides, and the gap and the receiving plate are both larger than the width of the material weld inspection.

[0018] In order to facilitate the adjustment of the angle of the steel pipe, the present invention is improved and also includes an angle adjustment component, which includes a second motor, a first turntable and a second turntable. The output end of the second motor passes through the rear side wall of the workbench and is connected to the first turntable. A second turntable compatible with the first turntable is also provided on the propulsion plate. The first turntable, the second turntable and the material are arranged concentrically.

[0019] Preferably, the propulsion plate is further provided with a guide rod passing through the workbench.

[0020] Preferably, the clamping area and the bearing area form a detection area, the length of the detection area is consistent with the length of the receiving plate, and the length of the dislocation area is greater than the front-to-back length of the sliding frame.

[0021] (3) Beneficial effects

[0022] Compared with the prior art, the present invention provides a weld detection device for welded steel pipes, which has the following beneficial effects:

[0023] The weld inspection device for welded steel pipes uses two sets of symmetrically arranged bearings to support the steel pipes, ensuring that the weld area is completely suspended, preventing the clamping device from blocking the radiation path, eliminating detection blind spots, and achieving no-dead-angle detection of welds.

[0024] Initially, when the push plate is in the reset area, the receiving plate protrudes horizontally downward from the bottom wall of the workbench, making it convenient for steel pipes to be loaded. When the push plate is in the clamping area to clamp the steel pipe, when the push plate passes through the flipping area, the bearing seat rotates and the receiving plate horizontally faces upward to cooperate with the transmitter to receive signals.

[0025] After the inspection is completed, the transmitter is located in the dislocation area. At this time, the push plate is reset and no longer clamps the material, which does not affect the material unloading. The receiving plate protrudes horizontally downward from the bottom wall of the workbench. Then the transmitter is reset again. The cleaning pad on the bottom wall of the sliding frame can directly wipe the surface of the receiving plate to remove impurities such as quenching liquid residue and metal debris, so as to avoid impurities interfering with the X-ray receiving signal, ensuring the clarity and accuracy of the test image. Cleaning can be completed without manual intervention, reducing detection errors and improving the reliability of the test results.

[0026] Through the second motor + double turntable mechanism (the first turntable and the second turntable are arranged concentrically with the steel pipe), the steel pipe is driven to rotate around the axis, the angle of the steel pipe is adjusted, and the stability of the detection is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic front view of the propulsion plate of the structure of the present invention in the reset zone;

[0028] Figure 2 The structure of the present invention Figure 1 Schematic diagram from above;

[0029] Figure 3 The structure of the present invention Figure 1 Schematic diagram of a local explosion;

[0030] Figure 4 It is a front view schematic diagram of the structure of the present invention;

[0031] Figure 5 The structure of the present invention Figure 4 A partial enlarged schematic diagram in the middle;

[0032] Figure 6 This is a schematic front view of the structure of the present invention, in which the propulsion plate is located in the clamping area and clamps the longest steel pipe;

[0033] Figure 7 The structure of the present invention Figure 6 Schematic diagram of a local explosion;

[0034] Figure 8 The structure of the present invention Figure 6 Schematic diagram from above;

[0035] Figure 9 This is a partial front view schematic diagram of the structure of the present invention when the propulsion plate is located in the clamping area and clamping the shortest steel pipe.

[0036] In the figure: 1. workbench; 2. transmitter; 3. receiving plate; 4. propeller; 5. propulsion plate; 6. connecting plate; 7. guide plate; 8. shift block; 9. gear; 10. rack; 11. fixed frame; 12. rotating shaft; 13. bearing seat; 14. support plate; 15. cover; 16. first motor; 17. worm gear; 18. worm; 19. screw; 20. slide frame; 21. lifter; 22. lifting plate; 23. cleaning pad; 24. support leg; 25. bearing frame; 26. roller frame; 27. support roller; 28. second motor; 29. ​​first turntable; 30. second turntable; 31. guide rod; 32. supporting rod. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1-9 , a weld detection device for welded steel pipes, comprising a workbench 1, a transmitter 2 and a receiving plate 3, comprising a workbench 1, a transmitter 2 and a receiving plate 3, and further comprising:

[0039] A moving part, wherein the workbench 1 is provided with a moving part for driving the launcher 2 to move;

[0040] The workbench 1 is provided with a hollow hole in the center, and the left and right sides of the hollow hole are provided with bearing members for centering the steel pipe;

[0041] The positioning member includes a propeller 4, a propeller plate 5 and a flip assembly. The output end of the propeller 4 passes through the front side of the workbench 1 and is connected to the propeller plate 5. The propeller plate 5 is arranged in the hollow hole. A flip assembly for driving the receiving plate 3 to flip is also provided below the propeller plate 5. The flip assembly includes a connecting plate 6, a guide plate 7, a shift block 8, a gear 9, a rack 10, a fixed frame 11, a rotating shaft 12 and a bearing seat 13. A guide plate 7 is provided below the propeller plate 5, a guide groove is provided below the guide plate 7, a shift block 8 inserted into the guide groove is provided at one end above the rack 10, and the rack 10 is meshed with the gear 9 below. A fixed frame 11 located below the bearing member is also provided in the hollow hole, and a bearing seat 13 is rotatably provided in the fixed frame 11. A rotating shaft 12 that passes through the fixed frame 11 and is connected to the center of the gear 9 is provided at one end of the bearing seat 13. A receiving plate 3 for receiving rays from the transmitter 2 is embedded on the bearing seat 13;

[0042] Two sets of supporting rods 32 passing through the gear 9 are also provided in the hollow hole, and the left and right sides of the supporting rods 32 are connected to the side walls of the hollow hole;

[0043] The hollow hole is divided into a reset area, a turning area, a clamping area, a bearing area of ​​the bearing member and a dislocation area from front to back in a horizontal direction.

[0044] Initially, the propeller 4 is in a retracted state, and the propulsion plate 5 is located in the reset area. At this time, the receiving plate 3 on the bearing seat 13 in the fixed frame 11 is horizontally downward, and the propeller 4 (such as a cylinder or an electric push rod) is started to push the propulsion plate 5 to move backward from the reset area. The propulsion plate 5 drives the connecting plate 6 to move, and then the guide groove of the guide plate 7 cooperates with the shift block 8 to shift the rack 10, and the supporting rod 32 ensures that the rack 10 moves left and right stably. In this embodiment, the guide groove is in an inverted L shape, and the guide groove is inclined at one end close to the bearing area, and the other free end of the guide groove is horizontally along the feed direction of the propulsion plate 5. Arranged horizontally, when the guide plate 7 moves to the rear side, the guide groove at the inclined free end pushes the shift block 8 to move, the rack 10 drives the gear 9 to rotate, and then the shaft 12 drives the bearing seat 13 to rotate. The receiving plate 3 arranged horizontally downward rotates 180 degrees and then moves horizontally upward. At this time, the shift block 8 enters the horizontal end of the guide groove, and the push plate 5 continues to feed to the clamping area. The steel pipe is supported by the supporting part on the workbench 1. At this time, the weld is facing upward, which is convenient for observation. The push plate 5 can cooperate with the workbench 1 to press against the steel pipe, and then start the moving part to adjust the position of the launcher 2 to detect the weld of the steel pipe;

[0045] Emitter 2 (such as an X-ray source or a gamma-ray source) emits rays with strong penetrating power, which penetrate vertically downward through the weld area of ​​the welded steel pipe. When the rays pass through the parent material (steel pipe body), they will be attenuated to a certain extent due to the material density and thickness. If there are defects inside the weld (such as pores, slag inclusions, incomplete penetration, cracks, etc.), the density of the defective area is lower than that of the parent material, and the absorption capacity of the rays is weaker, resulting in the intensity of the rays passing through the defective area being higher than that of the surrounding normal area.

[0046] The receiving plate 3 (such as a digital detector or film) is located directly below the weld, receiving the radiation transmitted through the weld and converting it into a visual signal. In normal base metal areas, due to the strong radiation attenuation, the corresponding position on the receiving plate 3 has a low signal intensity (imaged as dark or low grayscale). In defective areas, due to the high radiation transmittance, the signal intensity is high (imaged as bright or high grayscale). By analyzing the grayscale differences or shadow patterns on the receiving plate 3, it is possible to determine whether there are defects within the weld and the type of defect.

[0047] In this embodiment, the moving member includes a support plate 14, a cover 15, a first motor 16, a worm gear 17, a worm 18, a screw rod 19, a sliding frame 20, and a height adjusting member. Support plates 14 are symmetrically arranged on the front and rear sides of the workbench 1. A screw rod 19 is rotatably arranged on the left and right sides between the two groups of support plates 14. A cover 15 is further arranged on one of the support plates 14. A worm 18 and two worm gears 17 are arranged in the cover 15. The worm 18 meshes with the two worm gears 17. The output end of the first motor 16 penetrates through the cover 15 and is connected to the worm 18. The screw rod 19 penetrates through the support plate 14 and the cover 15 and is connected to the center of the corresponding worm gear 17. The sliding frame 20 is in a U shape. The top wall and the bottom wall of the sliding frame 20 are respectively located on the upper and lower sides of the workbench 1. A screw hole adapted to the screw rod 19 is further arranged on the top wall of the sliding frame 20. A height adjusting member for driving the emitter 2 to lift is further arranged on the top wall of the sliding frame 20. The two support plates 14 on the workbench 1 provide stable support for the cover 15. The first motor 16 drives the worm 18 to rotate,带动两侧蜗轮17和螺杆19同步旋转,蜗轮17进而带动螺杆19转动,滑框20通过螺孔沿螺杆19水平移动,调整发射器2的轴向位置,覆盖钢管不同长度的焊缝区域,所述高度调节件包括升降器21和升降板22,所述升降器21输出端贯通所述滑框20顶壁并与所述升降板22连接,所述升降板22下方设置有所述发射器2,升降器21可以采用气缸,升降器21带动升降板22移动,进而方便调整发射器2的高度。

[0048] During the actual use process, after the feeding is completed and the positioning member clamps the material, the moving member drives the emitter 2 to move. In this embodiment, the side wall of the sliding frame 20 is arranged on one side of the workbench 1. A cleaning pad 23 is further arranged above the bottom wall of the sliding frame 20. At this time, the bottom wall of the sliding frame 20 does not contact the bearing seat 13. After the detection is completed, at this time, the sliding frame 20 is located in the misalignment area. The clamping area and the bearing area form a detection area. The length of the detection area is the same as the length of the receiving plate 3. The length of the misalignment area is greater than the front and rear length of the sliding frame 20. The positioning member resets and no longer clamps the material. The sliding frame 20 resets with the reverse rotation of the motor. Legs 24 are arranged at the four corners below the workbench 1. When the pushing plate 5 is located in the reset area, the receiving plate 3 is horizontally downward, and the receiving plate 3 protrudes from the bottom wall of the workbench 1. The cleaning pad 23 can wipe the receiving plate 3. <>

[0049] During actual use, it is necessary to ensure that the bearing member does not interfere with the inspection of the steel pipe. To this end, the bearing member includes a bearing frame 25, a roller frame 26 and a support roller 27. The bearing frame 25 is connected to the side wall of the hollow hole. The bearing frame 25 is provided with the roller frame 26 on the side close to the center of the hollow hole. The roller frame 26 is also provided with a support roller 27 for carrying the material. A gap is provided between the two groups of support rollers 27 on the left and right sides. The gap and the receiving plate 3 are both larger than the width of the material weld inspection. The bearing frame 25 cooperates with the roller frame 26 to support the support roller 27. The upper part of the support roller 27 is in contact with the material. The weld detection device for welded steel pipes also includes an angle adjustment component. The angle adjustment assembly includes a second motor 28, a first turntable 29, and a second turntable 30. The output end of the second motor 28 extends through the rear sidewall of the workbench 1 and is connected to the first turntable 29. The propulsion plate 5 is also provided with a second turntable 30 adapted to the first turntable 29. The first turntable 29, the second turntable 30, and the material are arranged concentrically. After the material is clamped and limited by the two sets of turntables under the support of the carrier, the output end of the second motor 28 extends through the rear sidewall of the workbench 1 and is connected to the first turntable 29. The second turntable 30 provided on the propulsion plate 5 is adapted to the first turntable 29. The first turntable 29, the second turntable 30, and the material are arranged concentrically. The second motor 28 drives the first turntable 29 to rotate, thereby driving the second turntable 30 and the steel pipe to rotate about the axis, adjusting the angle of the steel pipe, enabling the transmitter 2 to inspect different parts of the weld and achieve a comprehensive inspection of the weld.

[0050] In this embodiment, the propulsion plate 5 is further provided with a guide rod 31 penetrating the workbench 1 to ensure the stability of the movement of the propulsion plate 5 .

[0051] It should be noted that after the detection is completed, the transmitter 2 first moves to the dislocation area (the length of the dislocation area is greater than the front and rear length of the slide frame 20, which can ensure that the transmitter 2 will not interfere with other components when moving in this area). At this time, the propeller 4 works in reverse, the propeller plate 5 is reset, and the steel pipe is no longer clamped, which does not affect the unloading of the steel pipe. In the process of the propeller plate 5 returning to the reset area after passing through the flipping area, the guide plate 7 drives the rack 10 to move in the opposite direction, and the receiving plate 3 flips from the horizontal upward to the horizontal downward, and protrudes from the bottom wall of the workbench 1. The cleaning pad 23 arranged above the bottom wall of the slide frame 20 can directly wipe the surface of the receiving plate 3 to remove impurities such as quenching liquid residues and metal debris that may be attached during the detection process, avoid impurities interfering with the ray receiving signal, ensure the clarity and accuracy of the detection image, and complete the cleaning without manual intervention, thereby reducing detection errors and improving the reliability of the detection results;

[0052] Once receiving plate 3 is flipped downward and transmitter 2 has moved to the misalignment zone, the steel pipe can be directly removed from support roller 27, completing the unloading operation. Because the device's hollow holes are horizontally divided from front to back into the reset zone, the flip zone, the clamping zone, the load-bearing zone, and the misalignment zone, each zone has a clear division of labor, allowing the entire inspection process to proceed in an orderly manner.

[0053] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0054] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0055] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A weld detection device for welded steel pipes, comprising a workbench (1), a transmitter (2) and a receiving plate (3), characterized in that: It further includes: A moving member, and a moving member for driving the emitter (2) to move is provided on the workbench (1); A bearing member, a hollow hole is provided in the center of the workbench (1), and bearing members for centering and bearing steel pipes are provided on the left and right sides in the hollow hole; A positioning member, the positioning member includes a thruster (4), a push plate (5) and a flipping component. The output end of the thruster (4) penetrates through the front side of the workbench (1) and is connected to the push plate (5). The push plate (5) is arranged in the hollow hole. A flipping component for driving the receiving plate (3) to flip is further provided below the push plate (5). The flipping component includes a connecting plate (6), a guide plate (7), a dial block (8), a gear (9), a rack (10), a fixed frame (11), a rotating shaft (12) and a bearing seat (13). A guide plate (7) is provided below the push plate (5), a guide groove is provided below the guide plate (7), a dial block (8) inserted into the guide groove is provided at one end above the rack (10), the rack (10) is engaged with the gear (9) below, a fixed frame (11) is further provided in the hollow hole and located below the bearing member, a bearing seat (13) is rotatably arranged in the fixed frame (11), a rotating shaft (12) penetrating through the fixed frame (11) and connected to the center of the gear (9) is provided at one end of the bearing seat (13), and a receiving plate (3) for receiving the rays of the emitter (2) is embedded in the bearing seat (13); Two groups of support rods (32) penetrating through the gear (9) are further provided in the hollow hole, and the left and right sides of the support rods (32) are connected to the side walls of the hollow hole; The hollow hole is divided into a reset area, a flipping area, a clamping area, a bearing area of the bearing member and a dislocation area from front to back in the horizontal direction.

2. A weld detection device for welded steel pipes according to claim 1, characterized in that: The moving member includes a support plate (14), a cover body (15), a first motor (16), a worm gear (17), a worm (18), a screw rod (19), a sliding frame (20) and a height adjusting member. Support plates (14) are symmetrically arranged on the front and back sides of the workbench (1). Screw rods (19) are rotatably arranged on the left and right sides between the two groups of support plates (14). A cover body (15) is further provided on one group of support plates (14). A worm (18) and two groups of worm gears (17) are provided in the cover body (15). The worm (18) is engaged with the two groups of worm gears (17). The output end of the first motor (16) penetrates through the cover body (15) and is connected to the worm (18). The screw rod (19) penetrates through the support plate (14) and the cover body (15) and is connected to the center of the corresponding worm gear (17). The sliding frame (20) is in a U shape. The top wall and the bottom wall of the sliding frame (20) are respectively located on the upper and lower sides of the workbench (1). A screw hole adapted to the screw rod (19) is further provided on the top wall of the sliding frame (20), and a height adjusting member for driving the emitter (2) to lift is further provided on the top wall of the sliding frame (20).

3. A weld detection device for welded steel pipes according to claim 2, characterized in that: The height adjustment member comprises a lifter (21) and a lifting plate (22); an output end of the lifter (21) passes through the top wall of the slide frame (20) and is connected to the lifting plate (22); and the transmitter (2) is provided below the lifting plate (22).

4. A weld detection device for welded steel pipes according to claim 3, characterized in that: The side wall of the sliding frame (20) is arranged on one side of the workbench (1), and a cleaning pad (23) is further arranged above the bottom wall of the sliding frame (20). Support legs (24) are arranged at the four corners below the workbench (1). When the pushing plate (5) is located in the reset area, the receiving plate (3) is horizontally downward, and the receiving plate (3) protrudes from the bottom wall of the workbench (1). The cleaning pad (23) can wipe the receiving plate (3).

5. The weld detection device for welded steel pipe according to claim 4, characterized in that: The carrier comprises a carrier frame (25), a roller frame (26) and a support roller (27); the carrier frame (25) is connected to the side wall of the hollow hole; the carrier frame (25) is provided with the roller frame (26) on one side close to the center of the hollow hole; the roller frame (26) is further provided with a support roller (27) for carrying the material; a gap is provided between the two groups of support rollers (27) on the left and right sides; the gap and the receiving plate (3) are both larger than the width of the material weld inspection.

6. A weld detection device for welded steel pipes according to claim 5, characterized in that: The invention also includes an angle adjustment component, which includes a second motor (28), a first turntable (29) and a second turntable (30). The output end of the second motor (28) passes through the rear side wall of the workbench (1) and is connected to the first turntable (29). The propulsion plate (5) is also provided with a second turntable (30) adapted to the first turntable (29). The first turntable (29), the second turntable (30) and the material are arranged concentrically.

7. The weld detection device for welded steel pipe according to claim 6, characterized in that: The pushing plate (5) is also provided with a guide rod (31) that passes through the workbench (1).

8. The weld detection device for welded steel pipe according to claim 7, characterized in that: The clamping area and the bearing area form a detection area, the length of the detection area is consistent with the length of the receiving plate (3), and the lengths of the dislocation area and the flipping area are greater than the front-to-back lengths of the sliding frame (20).

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