Ultrasonic flaw detection equipment for longitudinal inner surface defects of thick-wall steel pipe

Abstract

The utility model relates to the field of steel pipe detection, and discloses ultrasonic flaw detection equipment for longitudinal inner surface defects of a thick-wall steel pipe, which comprises a base and an ultrasonic probe, a detection table is slidably connected onto the base, a fixed vertical plate and a sliding vertical plate are respectively arranged at two ends of the detection table, and a first cylinder for driving the sliding vertical plate to slide is arranged on the detection table. The opposite sides of the fixed vertical plate and the sliding vertical plate are rotationally connected with fixed cylinders, the fixed vertical plate is fixedly connected with a first motor for driving the fixed cylinders to rotate, the outer side of each fixed cylinder is rotationally connected with at least one fixed swing arm, the supporting base is fixedly connected with a connecting block, and the upper end of the connecting block is fixedly connected with a detection plate. A sliding hole matched with the detection plate is formed in the detection table, a via hole coaxial with the fixing cylinder is formed in the detection plate, and a smearing mechanism is arranged in the via hole. Compared with the prior art, the device has the advantages that couplant smearing and ultrasonic flaw detection can be automatically carried out on the whole steel pipe, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe detection, in particular to an ultrasonic flaw detector for longitudinal inner surface defects of thick-walled steel pipes. Background Art

[0002] Ultrasonic flaw detection is a method of inspecting part defects by utilizing the characteristics that ultrasonic energy can penetrate deep into metal materials and reflect at the interface edge when passing from one cross-section to another. When the ultrasonic beam passes from the probe on the part surface into the metal interior, reflected waves occur respectively when encountering defects and the bottom surface of the part, forming pulse waveforms on the fluorescence screen. The position and size of the defects are judged based on these pulse waveforms.

[0003] During the production process of steel pipes, in order to ensure their quality, further quality inspection is required. The inner surface defects of steel pipes are further detected by an ultrasonic flaw detector. During the detection process, it is necessary for the staff to manually apply a coupling agent to the outer wall of the steel pipe, and then hold the probe to detect the steel pipe. During the detection process, the position of the steel pipe also needs to be continuously rotated, which is time-consuming and laborious, and the detection efficiency is relatively low. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The technical problem to be solved by the utility model is that the existing ultrasonic flaw detection methods for steel pipes all require manual detection by the staff, and it is inconvenient to adjust the detection position of the steel pipe during the detection process, which is time-consuming and laborious, and greatly affects the detection efficiency.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems, the technical solution provided by the utility model is: an ultrasonic flaw detector for longitudinal inner surface defects of thick-walled steel pipes, including a base and an ultrasonic probe. A detection table is slidably connected to the base, and a moving mechanism for driving the detection table to slide is provided on the base. Fixed vertical plates and sliding vertical plates are respectively arranged at both ends of the detection table. A first cylinder for driving the sliding vertical plate to slide is provided on the detection table. Fixed cylinders are rotatably connected to the opposite sides of the fixed vertical plate and the sliding vertical plate. A first motor for driving the fixed cylinder to rotate is fixedly connected to the fixed vertical plate. Not less than one fixed swing arm is rotatably connected to the outside of each fixed cylinder. An adjusting mechanism for driving the fixed swing arm to swing is provided in each fixed cylinder. A connecting block is fixedly connected to the base, and a detection plate is fixedly connected to the upper end of the connecting block. A sliding hole cooperating with the detection plate is provided on the detection table. A through hole coaxially arranged with the fixed cylinder is provided on the detection plate. Electric push rods arranged in an annular array are fixedly connected to the outer wall of the through hole. Ultrasonic probes are fixedly connected to the output ends of the electric push rods. A coating mechanism is provided in the through hole.

[0008] As an improvement, the moving mechanism includes a moving hole arranged along the length direction on the base. A screw rod is rotatably connected in the moving hole. One end of the base is fixedly connected with a second motor for driving the screw rod to rotate. The bottom surface of the detection table is fixedly connected with a moving block that is slidably connected in the moving hole and threadedly connected to the outer wall of the screw rod.

[0009] As an improvement, the adjusting mechanism includes adjusting holes arranged in a circular array along the outer wall of the fixed cylinder. Gears are rotatably connected in the adjusting holes. The fixed swing arm is fixedly connected to one side of the gear. A second air cylinder is fixedly connected in the fixed cylinder. The output end of the second air cylinder is fixedly connected with a connecting disk. A rack meshing with the gear is fixedly connected to the connecting disk.

[0010] As an improvement, the coating mechanism includes slots arranged corresponding to both sides in the through hole. Coating blocks are slidably inserted in the slots. Springs are fixedly connected between the bottom surface of the coating blocks and the inner walls of the slots. Cavities are provided in the coating blocks. Coating nozzles are provided at one end of the coating blocks. Feeding pumps are fixedly connected to both sides of the detection plate. Connecting hoses are provided between the output ends of the feeding pumps and the cavities.

[0011] As an improvement, a coating brush is provided on one side of the coating block where the coating nozzle is located.

[0012] As an improvement, an inclined surface is provided at one end of the coating block away from the ultrasonic probe.

[0013] (III) Beneficial effects

[0014] The advantages of the present utility model compared with the prior art are as follows: The steel pipe to be detected passes through the through hole and is sleeved outside the fixed cylinders on both sides. The steel pipe is fixed by the fixed swing arms on both sides, so that the steel pipe, the through hole and the fixed cylinders are in a coaxial position. The first motor can drive the fixed cylinder to drive the steel pipe to rotate. The electric push rod is started to drive the ultrasonic probe to contact the outer wall of the steel pipe. At the same time, the moving mechanism is started to drive the detection table to move, so that the steel pipe rotates while sliding along the through hole, realizing the detection of the whole steel pipe, saving time and effort and having higher detection efficiency. Brief description of the drawings

[0015] Figure 1 is an exploded view of an ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes of the present utility model.

[0016] Figure 2 is a structural schematic diagram of an ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes of the present utility model.

[0017] Figure 3 is a cross-sectional view of an ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes of the present utility model.

[0018] Figure 4 It is an enlarged view of part A of the ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes of the present utility model.

[0019] Figure 5 It is a schematic structural diagram of the coating mechanism of the ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes of the present utility model.

[0020] As shown in the figure: 1. Base; 2. Detection table; 3. Fixed vertical plate; 4. Sliding vertical plate; 5. First cylinder; 6. Fixed cylinder; 7. First motor; 8. Adjustment hole; 9. Fixed swing arm; 10. Gear; 11. Second cylinder; 12. Connecting plate; 13. Rack; 14. Slide hole; 15. Connecting block; 16. Detection plate; 17. Electric push rod; 18. Ultrasonic probe; 19. Slot; 20. Coating block; 21. Spring; 22. Connecting hose; 23. Feeding pump; 24. Moving block; 25. Moving hole; 26. Screw; 27. Second motor; 28. Through hole; 29. Coating brush; 30. Cavity; 31. Coating nozzle. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model.

[0022] As Figures 1 to 5 shown, an ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes includes a base 1 and an ultrasonic probe 18. A detection table 2 is slidably connected to the base 1. A moving mechanism for driving the detection table 2 to slide is provided on the base 1. The moving mechanism includes a moving hole 25 arranged along the length direction on the base 1. A screw 26 is rotatably connected in the moving hole 25. One end of the base 1 is fixedly connected with a second motor 27 for driving the screw 26 to rotate. The bottom surface of the detection table 2 is fixedly connected with a moving block 24 that is slidably connected in the moving hole 25 and threadedly connected to the outer wall of the screw 26.

[0023] Both ends of the detection table 2 are respectively provided with a fixed vertical plate 3 and a sliding vertical plate 4. A first cylinder 5 for driving the sliding vertical plate 4 to slide is arranged on the detection table 2. Fixed cylinders 6 are rotatably connected to the opposite sides of the fixed vertical plate 3 and the sliding vertical plate 4. A first motor 7 for driving the fixed cylinder 6 to rotate is fixedly connected to the fixed vertical plate 3. Not less than one fixed swing arm 9 is rotatably connected to the outer side of each fixed cylinder 6. An adjusting mechanism for driving the fixed swing arm 9 to swing is arranged in each fixed cylinder 6. The adjusting mechanism includes adjusting holes 8 arranged in an annular array along the outer wall of the fixed cylinder 6. Gears 10 are rotatably connected in the adjusting holes 8. The fixed swing arm 9 is fixedly connected to one side of the gear 10. A second cylinder 11 is fixedly connected in the fixed cylinder 6. A connecting disk 12 is fixedly connected to the output end of the second cylinder 11. A rack 13 meshing with the gear 10 is fixedly connected to the connecting disk 12.

[0024] A connecting block 15 is fixedly connected to the base 1. A detection plate 16(16) is fixedly connected to the upper end of the connecting block 15. A sliding hole 14 cooperating with the detection plate 16 is arranged on the detection table 2. A through hole 28 coaxially arranged with the fixed cylinder 6 is arranged on the detection plate 16. Electric push rods 17 arranged in an annular array are fixedly connected to the outer wall of the through hole 28. Ultrasonic probes 18 are fixedly connected to the output ends of the electric push rods 17. A coating mechanism is arranged in the through hole 28. The coating mechanism includes slots 19 arranged correspondingly on both sides in the through hole 28. Coating blocks 20 are slidably inserted in the slots 19. One end of the coating block 20 far from the ultrasonic probe 18 is provided with an inclined surface. A spring 21 is fixedly connected between the bottom surface of the coating block 20 and the inner wall of the slot 19. A cavity 30 is arranged in the coating block 20. A coating nozzle 31 is arranged at one end of the coating block 20. Material guiding pumps 23 are fixedly connected to both sides of the detection plate 16. A connecting hose 22 is arranged between the output end of the material guiding pump 23 and the cavity 30. A coating brush 29 is arranged on the coating block 20 on one side of the coating nozzle 31.

[0025] In specific use, one end of the steel pipe passes through the through hole 28 and is sleeved on the outer wall of the fixed cylinder 6 on one side of the fixed vertical plate 3. When the steel pipe passes through the through hole 28, it squeezes the coating block 20 to slide into the slot 19, causing the spring 21 to undergo compressive deformation. The second cylinder 11 is started to drive the connecting plate 12 to drive the rack 13 to slide. The rack 13 drives the fixed swing arm 9 to swing, so that the end of the fixed swing arm 9 abuts against the inner wall of the steel pipe, making the steel pipe and the fixed cylinder 6 in a coaxial position, and at the same time, the steel pipe can be fixed. The first cylinder 5 is started to pull the fixed vertical plate 3 to approach the other end of the steel pipe, so that the fixed cylinder 6 on one side of the interactive vertical plate also inserts into the steel pipe. The adjusting mechanism is started again to support and fix the steel pipe. The first motor 7 is started to drive the fixed cylinder 6 to rotate. The fixed cylinder 6 drives the steel pipe to rotate through the fixed swing arm 9. The feeding pumps 23 on both sides are started to extract the coupling agent. The coupling agent enters the cavity 30 through the connecting hose 22 and is sprayed on the outer wall of the steel pipe through the coating nozzle 31. As the steel pipe rotates, in cooperation with the coating brush 29, the coupling agent is evenly coated on the outer wall of the steel pipe. The second motor 27 is started to drive the screw 26 to rotate. The screw 26 drives the moving block 24 to slide along the moving hole 25. The moving block 24 drives the detection table 2 to slide along the base 1. The detection table 2 drives the steel pipe to move, so that the connecting block 15 slides along the sliding hole 14, and the steel pipe slides along the end of the coating head. The electric push rod 17 is started to push the ultrasonic probe 18 to contact the outer wall of the steel pipe. In cooperation with the rotation of the steel pipe itself, flaw detection of the entire steel pipe is realized, which saves time and effort.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0028] The above description is about the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. In short, if those of ordinary skill in the art are inspired by it and design, without creative work, structural manners and embodiments similar to the technical solution without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. An ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes, comprising a base (1) and an ultrasonic probe (18), characterized in that: A detection table (2) is slidably connected to the base (1). A moving mechanism for driving the detection table (2) to slide is provided on the base (1). Fixed vertical plates (3) and sliding vertical plates (4) are respectively arranged at both ends of the detection table (2). A first cylinder (5) for driving the sliding vertical plate (4) to slide is provided on the detection table (2). Fixed cylinders (6) are rotatably connected to the opposite sides of the fixed vertical plate (3) and the sliding vertical plate (4). A first motor (7) for driving the fixed cylinder (6) to rotate is fixedly connected to the fixed vertical plate (3). Not less than one fixed swing arm (9) is rotatably connected to the outer side of the fixed cylinder (6). An adjusting mechanism for driving the fixed swing arm (9) to swing is provided in each of the fixed cylinders (6). A connecting block (15) is fixedly connected to the base (1). A detection plate (16) is fixedly connected to the upper end of the connecting block (15). A sliding hole (14) for cooperating with the detection plate (16) is provided on the detection table (2). A through hole (28) arranged coaxially with the fixed cylinder (6) is provided on the detection plate (16). Electric push rods (17) arranged in an annular array are fixedly connected to the outer wall of the through hole (28). Ultrasonic probes (18) are fixedly connected to the output ends of the electric push rods (17). A coating mechanism is provided in the through hole (28).

2. The ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes according to claim 1, characterized in that: The moving mechanism includes a moving hole (25) arranged along the length direction on the base (1). A screw rod (26) is rotatably connected in the moving hole (25). A second motor (27) for driving the screw rod (26) to rotate is fixedly connected to one end of the base (1). A moving block (24) which is slidably connected in the moving hole (25) and threadedly connected to the outer wall of the screw rod (26) is fixedly connected to the bottom surface of the detection table (2).

3. The ultrasonic flaw detection device for longitudinal internal surface defects of thick-walled steel pipes according to claim 1, characterized in that: The adjusting mechanism includes adjusting holes (8) arranged in an annular array on the outer wall of the fixed cylinder (6). Gears (10) are rotatably connected in the adjusting holes (8). The fixed swing arm (9) is fixedly connected to one side of the gear (10). A second cylinder (11) is fixedly connected in the fixed cylinder (6). A connecting disc (12) is fixedly connected to the output end of the second cylinder (11). A rack (13) meshing with the gear (10) is fixedly connected to the connecting disc (12).

4. An ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes according to claim 1, characterized in that: The coating mechanism includes slots (19) arranged correspondingly on both sides in the through hole (28). Coating blocks (20) are slidably inserted in the slots (19). Springs (21) are fixedly connected between the bottom surface of the coating block (20) and the inner wall of the slot (19). A cavity (30) is provided in the coating block (20). A coating nozzle (31) is provided at one end of the coating block (20). Material guiding pumps (23) are fixedly connected to both sides of the detection plate (16). Connecting hoses (22) are provided between the output ends of the material guiding pumps (23) and the cavity (30).

5. The ultrasonic flaw detection equipment for longitudinal inner surface defects of thick-walled steel pipes according to claim 4, characterized in that: The application block (20) is provided with an application brush (29) on one side of the application nozzle (31).

6. The ultrasonic flaw detection device for longitudinal inner surface defects of thick-walled steel pipes according to claim 4, characterized in that: One end of the application block (20) far from the ultrasonic probe (18) is provided with an inclined surface.

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