Guiding device for automatic ultrasonic detection of weld seams of steel pipes without blind spots

Abstract

The present application belongs to the technical field of weld ultrasonic flaw detection, and particularly relates to a steel pipe weld non-blind area ultrasonic automatic detection guide device, which aims to solve the problems of increased production cost and reduced efficiency caused by increasing manual detection personnel to cope with continuous detection blind area. The present application comprises a support seat, an arc extinguishing plate arranged on the support seat, and a horizontal adjusting assembly and a vertical adjusting assembly for adjusting the position of the arc extinguishing plate; the support seat comprises a walking trolley for supporting the steel pipe to be detected and a support platform; the horizontal adjusting assembly and the vertical adjusting assembly are arranged on the support platform and adjust the arc extinguishing plate to be in alignment and contact with the end face of the steel pipe to be detected. The present application adjusts the arc extinguishing plate of the corresponding specification according to the different pipe diameter and wall thickness, ensures that the detection probe support smoothly transitions to the side of the arc extinguishing plate auxiliary device during the detection process, eliminates the blind area of the pipe end weld continuous detection, reduces the subsequent manual detection work, improves the production efficiency, and reduces the labor cost.

Description

Technical Field

[0001] This invention belongs to the technical field of ultrasonic flaw detection of welds, and specifically relates to a blind-zone-free ultrasonic automatic detection guidance device for steel pipe welds. Background Technology

[0002] The ultrasonic testing device for straight seam welded pipes uses a laser sensor to locate the pipe end. After signal recognition, the ultrasonic probes mounted on corresponding probe supports descend sequentially onto the weld surface to begin the flaw detection process. The process of descent and the start of detection is crucial, but the probe supports themselves have a certain volume, resulting in areas not covered at the pipe end – a certain blind spot. Currently, to address this blind spot issue in non-destructive testing of pipe end welds, a manual inspection station will be added to compensate for the lack of coverage during manual inspection.

[0003] However, in actual testing, manual inspection is inefficient and costly. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, namely the problem of increased production costs and reduced efficiency caused by the need to increase the number of manual inspection personnel to cope with blind spots in continuous inspection, the present invention provides a blind spot-free ultrasonic automatic inspection guide device for steel pipe welds.

[0005] This application discloses a blind-zone-free ultrasonic automatic inspection guidance device for steel pipe welds, which adopts the following technical solution:

[0006] A blind-zone-free ultrasonic automatic detection guide device for steel pipe welds includes a support base, an arc extinguishing plate disposed on the support base, and a horizontal adjustment component and a vertical adjustment component for adjusting the position of the arc extinguishing plate.

[0007] The support base includes a traveling trolley that supports the steel pipe to be tested and a support platform that is fixedly connected to the traveling trolley.

[0008] The horizontal and vertical adjustment components are arranged on the support platform and adjust the extinguishing plate to be aligned and in contact with the end face of the steel pipe to be tested.

[0009] By adopting the above technical solution, the arc-extinguishing plate is installed on the upper side of the support platform. The position of the arc-extinguishing plate is adjusted using horizontal and vertical adjustment components until it is flush with the upper side of the steel pipe to be tested, ensuring alignment. Then, a probe holder with an ultrasonic probe is placed on the arc-extinguishing plate. The steel pipe to be tested is moved forward by the support frame, allowing the probe holder to move onto the steel pipe via the arc-extinguishing plate and perform flaw detection along the length of the steel pipe. During flaw detection, because the probe holder moves onto the steel pipe via the arc-extinguishing plate, the detection range of the ultrasonic probe can cover the entire area of ​​the steel pipe and part of the arc-extinguishing plate, thus eliminating blind spots in the flaw detection process. Furthermore, adjusting the position of the arc-extinguishing plate using the horizontal and vertical adjustment components also solves the problem of increased production costs and reduced efficiency caused by the need for manual inspection personnel to address blind spots in continuous testing.

[0010] Optionally, the horizontal adjustment assembly includes a horizontal support mounted on a support platform, a horizontal track fixedly connected to the support platform to guide the horizontal support's direction of travel, and a horizontal motor that drives the horizontal support to move.

[0011] By adopting the above technical solution, when the horizontal adjustment component moves the arc extinguishing plate, it can move the arc extinguishing plate closer to or further away from the steel pipe to be tested, thereby adjusting the horizontal position of the arc extinguishing plate.

[0012] Optionally, a horizontal rack is fixedly connected to the side of the horizontal track;

[0013] The horizontal motor is arranged vertically, and a horizontal gear is fixedly connected to the shaft of the horizontal motor, which meshes with a horizontal rack.

[0014] By adopting the above technical solution, when the horizontal motor starts, it drives the horizontal gear to rotate. The horizontal gear moves along the length of the horizontal rack, and the movement direction of the horizontal support is controlled by the forward and reverse rotation of the horizontal motor.

[0015] Optionally, the vertical adjustment assembly includes a vertical bracket, which is fixedly connected to the support platform, and a vertical motor is fixedly connected to the vertical bracket, the vertical motor being arranged horizontally.

[0016] A fixed cylinder is fixedly connected to the upper side of the support platform. The fixed cylinder is arranged vertically, and a rotating rod is inserted through the fixed cylinder. The rotating rod is arranged vertically and rotates within the fixed cylinder. An adjusting cylinder is fixedly connected to the upper side of the fixed cylinder, and the upper end of the rotating shaft extends out of the adjusting cylinder.

[0017] A turbine is fitted and fixedly connected to the shaft, and the turbine is arranged in the adjusting cylinder; a worm is fixedly connected to the shaft of the vertical motor, the worm passes through the adjusting cylinder, and both ends are rotatably connected to the adjusting cylinder; when the turbine passes through the adjusting cylinder, the worm meshes with the turbine.

[0018] A support plate is fixedly connected to the upper end of the rotating rod, and the arc extinguishing plate is installed on the support plate.

[0019] By adopting the above technical solution, the vertical adjustment component uses a worm gear to guide the arc extinguishing plate to move in the vertical direction. When the upper surface of the arc extinguishing plate is flush with the upper surface of the end of the steel pipe to be tested, the adjustment is basically in place.

[0020] Optionally, the arc extinguishing plate is provided with clamping screws to fix the arc extinguishing plate to the support plate.

[0021] By adopting the above technical solution, it is convenient to replace the arc extinguishing plate according to different pipe diameters.

[0022] Optionally, a protective cover is fitted onto the rotating rod, and the protective cover is arranged between the adjusting cylinder and the support plate.

[0023] By adopting the above technical solution, the protective cover prevents water and impurities from contaminating the turbine worm gear, ensuring its good lubrication.

[0024] Optionally, the support platform is a cantilever structure with a through-hole on the underside of the support platform.

[0025] By adopting the above technical solutions, the design weight of the support platform can be reduced while maintaining its rigidity and strength.

[0026] Optionally, a rotating roller assembly for supporting the steel pipe to be tested is installed on the upper side of the traveling trolley;

[0027] The roller assembly includes a bearing housing and a rubber roller. The bearing housing is fixedly connected to the traveling trolley by bolts. There are two sets of bearing housings. The rubber roller is arranged between the two sets of bearing housings and is rotatably connected between the bearing housings. The rotation direction of the rubber roller is perpendicular to the traveling direction of the traveling trolley.

[0028] By adopting the above technical solution, when the steel pipe to be tested is placed on the traveling trolley, the rubber roller supports the steel pipe, and the rotation direction of the rubber roller is perpendicular to the length direction of the steel pipe. This restricts the translation of the steel pipe on the traveling trolley, allowing it to be stably placed and propelled forward by the trolley. When it is necessary to adjust the position of the weld on the steel pipe, it can be manually rotated along its own centerline. This rotation also drives the rubber roller to rotate, reducing the friction between the steel pipe and the rubber roller, facilitating the rotation of the steel pipe. The weld position of the steel pipe can be rotated 360°, allowing for precise positioning of the weld and online detection probe. In particular, the weld at the pipe end is efficiently positioned at a vertical 90° position, facilitating subsequent alignment of the arc-extinguishing plate.

[0029] The beneficial effects of this invention are:

[0030] Based on the analysis and research of existing online continuous inspection methods for oil and gas pipelines, this patent proposes for the first time the use of an online arc-extinguishing plate auxiliary device. The arc-extinguishing plate of the appropriate specification is adjusted according to different pipe diameters and wall thicknesses to ensure that the detection probe support smoothly transitions to the arc-extinguishing plate auxiliary device side during the inspection process. This eliminates blind spots in the continuous inspection of pipe end welds, reduces subsequent manual inspection work, improves production efficiency, and reduces labor costs.

[0031] This invention primarily solves the following problems: 1. It addresses the issue of blind spots in the continuous non-destructive testing (NDT) process of straight seam welded pipes. 2. It addresses the problem of increased production costs and reduced efficiency caused by the need to increase the number of manual testing personnel to address these blind spots. Attached Figure Description

[0032] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the guiding device in this embodiment;

[0034] Figure 2 This is a schematic diagram of the support base in this embodiment;

[0035] Figure 3 This is a schematic diagram of the horizontal adjustment component in this embodiment;

[0036] Figure 4 This is a schematic diagram of the vertical adjustment component and the arc extinguishing plate in this embodiment.

[0037] Explanation of reference numerals in the attached drawings: 1. Support base; 11. Traveling trolley; 12. Support platform; 2. Arc extinguishing plate; 3. Horizontal adjustment assembly; 31. Horizontal support; 32. Horizontal track; 33. Horizontal rack; 34. Horizontal motor; 35. Horizontal gear; 4. Vertical adjustment assembly; 41. Vertical bracket; 42. Vertical motor; 43. Fixed cylinder; 44. Rotating rod; 45. Adjusting cylinder; 46. Turbine; 47. Worm gear; 48. Protective cover; 49. Support plate; 5. Rotating roller assembly; 51. Bearing seat; 52. Rubber roller. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This invention provides a blind-spot-free ultrasonic automatic inspection guidance device for steel pipe welds, referring to... Figure 1 The blind-spot-free ultrasonic automatic detection guide device for steel pipe welds includes a support base 1, an arc extinguishing plate 2 set on the support base 1, and a horizontal adjustment component 3 and a vertical adjustment component 4 for adjusting the position of the arc extinguishing plate 2.

[0041] Reference Figure 2 The support base 1 includes a traveling trolley 11 and a support platform 12 fixedly connected to the traveling trolley 11.

[0042] A traveling trolley 11 is positioned at the test location, and a drive motor is installed on the traveling trolley 11 to drive it forward. The drive motor drives the traveling trolley 11 to move. A track is arranged on the underside of the traveling trolley 11 to guide its forward trajectory, and the traveling trolley reciprocates on the track driven by the drive motor.

[0043] A rotating roller assembly 5 is installed on the upper side of the traveling trolley 11. The rotating roller assembly 5 supports the steel pipe to be tested and guides the steel pipe to be tested to rotate when adjusting the position of the weld seam of the steel pipe to be tested.

[0044] The rotating roller assembly 5 includes bearing seats 51 and rubber rollers 52. The bearing seats 51 are fixedly connected to the traveling trolley 11 by bolts. Two sets of bearing seats 51 are provided, and the rubber rollers 52 are arranged between the two sets of bearing seats 51 and are rotatably connected between the bearing seats 51. In this embodiment, four rubber rollers 52 are provided. The rotation direction of the rubber rollers 52 is perpendicular to the traveling direction of the traveling trolley 11. When the steel pipe to be tested is arranged on the traveling trolley 11, the rubber rollers 52 support the steel pipe to be tested, and the rotation direction of the rubber rollers 52 is perpendicular to the length direction of the steel pipe to be tested. This restricts the translation of the steel pipe to be tested on the traveling trolley 11 by the rubber rollers 52, thereby enabling the steel pipe to be tested to be stably arranged on the traveling trolley 11 and driven forward by the traveling trolley 11. When it is necessary to adjust the position of the weld on the steel pipe to be tested, the steel pipe can be manually rotated so that it rotates along its own center line. The rotation can also drive the rubber roller 52 to rotate, thereby reducing the friction between the steel pipe and the rubber roller 52, making it easier to rotate the steel pipe. The weld position of the steel pipe to be tested can be rotated 360°, so that the weld to be tested is accurately positioned with the online detection probe. In particular, the weld at the pipe end is efficiently positioned at a vertical 90° position, which is convenient for the subsequent centering of the arc extinguishing plate 2.

[0045] The support platform 12 is a cantilever structure, located at the test site. A through hole is made on the underside of the support platform 12 to reduce its design weight while maintaining its rigidity and strength.

[0046] The arc-extinguishing plate 2 is installed on the upper side of the support platform 12. The position of the arc-extinguishing plate 2 is adjusted using the horizontal adjustment component 3 and the vertical adjustment component 4 until it is flush with the upper side of the steel pipe to be tested. This aligns the arc-extinguishing plate 2 with the steel pipe. Then, a probe holder with an ultrasonic probe is placed on the arc-extinguishing plate 2. The steel pipe to be tested moves forward under the drive of the support frame, allowing the probe holder to move onto the steel pipe via the arc-extinguishing plate 2 and perform flaw detection along the length of the steel pipe. During flaw detection, because the probe holder moves onto the steel pipe via the arc-extinguishing plate 2, the detection range of the ultrasonic probe can cover the entire area of ​​the steel pipe and part of the arc-extinguishing plate 2, thus eliminating blind spots in the flaw detection process. Furthermore, adjusting the position of the arc-extinguishing plate 2 using the horizontal adjustment component 3 and the vertical adjustment component 4 also solves the problem of increased production costs and reduced efficiency caused by the need for manual inspection personnel to address blind spots in continuous testing.

[0047] Reference Figure 3The horizontal adjustment component 3 includes a horizontal support 31 mounted on a support platform 12. A horizontal rail 32 is fixedly connected to the support platform 12, and a horizontal rack 33 is fixedly connected to the side of the horizontal rail 32. A horizontal motor 34 is fixedly connected to the horizontal support 31. The horizontal motor 34 is vertically arranged, and a horizontal gear 35 is fixedly connected to the shaft of the horizontal motor 34. The horizontal gear 35 meshes with the horizontal rack 33. The horizontal support 31 is mounted on the horizontal rail 32. When the horizontal motor 34 starts, it drives the horizontal gear 35 to rotate. The horizontal gear 35 moves along the length direction of the horizontal rack 33. The direction of movement of the horizontal support 31 is controlled by the forward and reverse rotation of the horizontal motor 34. The horizontal rail 32 and the horizontal rack 33 are parallel to the length direction of the steel pipe to be tested, so that when the horizontal adjustment component 3 moves the arc extinguishing plate 2, it can move the arc extinguishing plate 2 closer to or away from the steel pipe to be tested, thereby adjusting the horizontal position of the arc extinguishing plate 2.

[0048] Reference Figure 3 , Figure 4 The vertical adjustment component 4 includes a vertical support 41, which is fixedly connected to the horizontal support 31, and a vertical motor 42 is fixedly connected to the vertical support 41. The vertical motor 42 is arranged horizontally.

[0049] A fixed cylinder 43 is fixedly connected to the upper side of the horizontal support 31. The fixed cylinder 43 is vertically arranged, and a rotating rod 44 passes through the fixed cylinder 43. The rotating rod 44 is vertically arranged and rotates within the fixed cylinder 43. An adjusting cylinder 45 is fixedly connected to the upper side of the fixed cylinder 43, and the upper end of the rotating shaft passes through the adjusting cylinder 45. A worm gear 46 is fitted and fixedly connected to the shaft of the rotating shaft and is arranged within the adjusting cylinder 45. A worm 47 is fixedly connected to the rotating shaft of the vertical motor 42. The worm gear 47 passes through the adjusting cylinder 45, and its two ends are rotatably connected to the adjusting cylinder 45. When the worm gear 46 passes through the adjusting cylinder 45, the worm gear 47 meshes with the worm gear 46. A support plate 49 is fixedly connected to the upper end of the rotating rod 44. The arc extinguishing plate 2 is placed on the support plate 49 and its relative freedom is restricted by the clamping screw. A protective cover 48 is sleeved on the rotating rod 44. The protective cover 48 is arranged between the adjusting cylinder 45 and the support plate 49 to prevent the medium water and impurities from contaminating the turbine 46 and worm gear 47 and to ensure their good lubrication.

[0050] In this embodiment, the traveling trolley 11, rotating roller, support base 1, horizontal adjustment component 3, and vertical adjustment component 4 are symmetrically structured to ensure the stability of the 12m steel pipe at the inspection station. Before non-destructive testing, the horizontal adjustment component 3 and vertical adjustment component 4 are adjusted to ensure accurate alignment between the arc-extinguishing plate 2 and the pipe end weld. After successful alignment between the arc-extinguishing plate 2 and the pipe end weld, the continuous probe inspection frame can eliminate the blind spot of the pipe end weld non-destructive testing through the arc-extinguishing plate 2 auxiliary device, achieving full coverage of continuous non-destructive testing of the steel pipe weld.

[0051] The method of using the blind-spot-free ultrasonic automatic detection guide device for steel pipe welds disclosed in this application is as follows:

[0052] (1) Transport the steel pipe to be tested to the testing station:

[0053] When the welded steel pipe passes the cutting station of the arc ignition plate 2, the arc ignition plates 2 at both ends of the weld will be cut off by the robot. After the residual welding slag and cutting spatter are cleaned up, the steel pipe to be tested is transported to the continuous testing station by the traveling trolley 11, and the steel pipe to be tested is pushed forward by the lifting mechanism.

[0054] (2) Inspecting the weld seam of the steel pipe aligned with the inspection guide device:

[0055] According to the technical requirements of the production project, the corresponding specification of the arc-extinguishing plate 2 is selected and fixedly installed on the support plate 49 at the top of the worm gear 47 of the turbine 46, and locked in place. The rotating rollers of the traveling trolley 11 are operated, causing the steel pipe to rotate circumferentially. The weld rotates to a vertical 90° position and stops. The horizontal adjustment component 3 moves inward from the 0-point position on both sides of the far end. When the arc-extinguishing plate 2 is nearly in contact with the weld side face of the steel pipe end, the movement stops. At this point, the vertical adjustment component 4 is found to be basically in place. The vertical adjustment component 4 uses the turbine gear 47 of the turbine 46 to guide the arc-extinguishing plate 2 to move vertically. When the upper surface of the arc-extinguishing plate 2 is flush with the upper surface of the steel pipe end, the adjustment is basically in place. After coarse adjustment of the horizontal adjustment component 3 and the vertical adjustment component 4, the detection guide device is basically in place. After further fine-tuning according to the actual situation, the detection guide device aligns with the weld seam of the steel pipe being inspected, meeting the on-site inspection conditions.

[0056] (3) Weld inspection process:

[0057] The trolley 11 is operated. When the guide device near the head of the ultrasonic testing equipment enters the first set of testing probes, the alignment between the weld to be tested and the testing probes is finely adjusted. Once the technical conditions are met, the first set of testing probe supports will fall onto the arc-extinguishing plate 2. The ultrasonic equipment begins to test the steel pipe weld. At this time, the ultrasonic equipment remains stationary, ensuring that the weld at the head of the steel pipe is tested first. Each probe support rises and falls sequentially according to the testing control logic until all welds of the steel pipe are tested. Then, the last set of testing probe supports will fall onto the guide device at the end, ensuring full coverage of the weld at the end of the steel pipe.

[0058] (4) Detect the 0-point position of the guide device:

[0059] After the weld seam of the steel pipe to be tested is inspected, the traveling trolley 11 will transport the entire steel pipe away from the ultrasonic testing equipment. First, the horizontal adjustment component 3 will be activated, and the arc extinguishing plates 2 on both sides will separate from the contact surface of the steel pipe until they return to the 0 point position. If it is continuous production, the vertical adjustment component 4 will not be adjusted after the lane change is successful once, unless the production of the same specification steel pipe project is completed, or when production is stopped and the work is finished, the vertical adjustment component 4 will be used to return the arc extinguishing plate 2 auxiliary device to the 0 point position in the vertical direction.

[0060] This patent, based on the analysis and research of existing online continuous inspection methods for oil and gas pipelines, proposes for the first time the use of an online arc-extinguishing plate 2 auxiliary device. The arc-extinguishing plate 2 is adjusted to the appropriate specifications according to different pipe diameters and wall thicknesses, ensuring a smooth transition of the detection probe support to the arc-extinguishing plate 2 auxiliary device side during inspection. This eliminates blind spots in continuous inspection of pipe end welds, reduces subsequent manual inspection work, improves production efficiency, and lowers labor costs. It mainly solves the following problems: 1. Solving the problem of blind spots in the continuous non-destructive testing of straight seam welded pipes. 2. Solving the problem of increased production costs and reduced efficiency caused by adding manual inspection personnel to address blind spots in continuous inspection.

[0061] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0062] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A blind-zone-free ultrasonic automatic inspection and guidance device for steel pipe welds, characterized in that: It includes a support base (1), an arc extinguishing plate (2) disposed on the support base (1), and a horizontal adjustment component (3) and a vertical adjustment component (4) for adjusting the position of the arc extinguishing plate (2); The support base (1) includes a traveling trolley (11) that supports the steel pipe to be tested and a support platform (12) that is fixedly connected to the traveling trolley (11); The horizontal adjustment component (3) and the vertical adjustment component (4) are arranged on the support platform (12) and the arc extinguishing plate (2) is adjusted to be aligned and in contact with the end face of the steel pipe to be tested.

2. The blind-zone-free ultrasonic automatic detection guide device for steel pipe welds according to claim 1, characterized in that: The horizontal adjustment assembly (3) includes a horizontal support (31) installed on the support platform (12), a horizontal rail (32) fixedly connected to the support platform (12) to guide the horizontal support (31) in the direction of travel, and a horizontal motor (34) that drives the horizontal support (31) to move.

3. The blind-zone-free ultrasonic automatic detection guide device for steel pipe welds according to claim 2, characterized in that: A horizontal rack (33) is fixedly connected to the side of the horizontal track (32); The horizontal motor (34) is arranged vertically, and a horizontal gear (35) is fixedly connected to the shaft of the horizontal motor (34), and the horizontal gear (35) meshes with the horizontal rack (33).

4. The blind-zone-free ultrasonic automatic detection guide device for steel pipe welds according to claim 1, characterized in that: The vertical adjustment assembly (4) includes a vertical bracket (41), which is fixedly connected to the support platform (12), and a vertical motor (42) is fixedly connected to the vertical bracket (41), which is arranged horizontally. A fixed cylinder (43) is fixedly connected to the upper side of the support platform (12). The fixed cylinder (43) is arranged vertically, and a rotating rod (44) is inserted through the fixed cylinder (43). The rotating rod (44) is arranged vertically and rotates in the fixed cylinder (43). An adjusting cylinder (45) is fixedly connected to the upper side of the fixed cylinder (43), and the upper end of the rotating shaft passes through the adjusting cylinder (45). A turbine (46) is fitted and fixedly connected to the shaft of the rotating shaft, and the turbine (46) is arranged in the adjusting cylinder (45); a worm (47) is fixedly connected to the shaft of the vertical motor (42), the worm (47) passes through the adjusting cylinder (45), and both ends are rotatably connected to the adjusting cylinder (45). When the turbine (46) passes through the adjusting cylinder (45), the worm (47) meshes with the turbine (46). The upper end of the rotating rod (44) is fixedly connected to a support plate (49), and the arc extinguishing plate (2) is installed on the support plate (49).

5. The blind-zone-free ultrasonic automatic detection guide device for steel pipe welds according to claim 4, characterized in that: The extinguishing plate (2) is fitted with clamping screws to fix the extinguishing plate (2) to the support plate (49).

6. The blind-zone-free ultrasonic automatic detection guide device for steel pipe welds according to claim 4, characterized in that: A protective cover (48) is fitted on the rotating rod (44), and the protective cover (48) is arranged between the adjusting cylinder (45) and the support plate (49).

7. The blind-spot-free ultrasonic automatic inspection guide device for steel pipe welds according to claim 1, characterized in that: The support platform (12) is a cantilever structure with a through hole on the lower side of the support platform (12).

8. The blind-zone-free ultrasonic automatic inspection guide device for steel pipe welds according to claim 1, characterized in that: The upper side of the traveling trolley (11) is equipped with a rotating roller assembly (5) to support the steel pipe to be tested; The roller assembly (5) includes a bearing seat (51) and a rubber roller (52). The bearing seat (51) is fixedly connected to the traveling trolley (11) by bolts. There are two sets of bearing seats (51). The rubber roller (52) is arranged between the two sets of bearing seats (51) and is rotatably connected between the bearing seats (51). The rotation direction of the rubber roller (52) is perpendicular to the traveling direction of the traveling trolley (11).

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