Welding seam detection device for pressure vessel

Abstract

The utility model relates to the technical field of welding seam detection, in particular to a welding seam detection device for a pressure vessel. According to the technical scheme, the device comprises a bottom frame and a detection frame, the detection frame is slidably connected to the upper end of the bottom frame and is of an arc structure, an ultrasonic detection head is fixed to the middle of the inner side of the detection frame, a pair of range finders are fixed to the inner side wall of the detection frame, a set of advancing wheels are rotationally connected into the bottom frame, and bases are fixed to the positions, corresponding to the advancing wheels, of the inner side wall of the bottom frame; driving equipment for driving the advancing wheels to rotate is fixed in the base, and rotating wheels are rotationally connected to the side wall of the bottom frame and located above the advancing wheels. When the ultrasonic detection head is used for non-destructive detection, linear welding seam detection can be achieved through sliding of the detection frame, the pressure container can be driven to rotate automatically through rotation of the rotating wheel, circumferential welding seam detection is achieved, excessive overturning and pressure container moving operation are not needed, and the detection difficulty is lowered.

Description

Technical Field

[0001] This utility model relates to the field of weld inspection technology, specifically a pressure vessel weld inspection device. Background Technology

[0002] Weld inspection devices are important equipment used to inspect the quality of welded joints. They are widely used in many industries, such as power, petrochemical, boiler and pressure vessel, steel structure, military, aerospace, railway transportation, automobile and machinery manufacturing. The main function of these devices is to detect internal quality problems in the weld, such as cracks, lack of fusion, incomplete penetration, slag inclusions, porosity, etc., to ensure that the quality of the welded joint meets the standard requirements.

[0003] In order to ensure the integrity of the vessel and avoid sludge damage during the inspection of weld seams on pressure vessels, non-destructive testing methods are often required, mainly ultrasonic weld defect detection heads. However, if there is no auxiliary equipment to change the position of the pressure vessel or detection head during the inspection process, the pressure vessel or detection head needs to be moved or transported, and may even need to be rotated at multiple angles, which is extremely inconvenient and reduces the inspection efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure vessel weld inspection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a base frame and a testing frame. The testing frame is slidably connected to the upper end of the base frame and has an arc structure. An ultrasonic testing head is fixed at the middle position of the inner side of the testing frame. A pair of rangefinders are fixed to the inner side wall of the testing frame. A set of traveling wheels is rotatably connected inside the base frame. A base is fixed to the inner side wall of the base frame at a position corresponding to the traveling wheels. A driving device for rotating the traveling wheels is fixed inside the base. A rotating wheel is rotatably connected to the side wall of the base frame above the traveling wheels. A telescopic plate is installed on the side wall of the base frame at a position corresponding to the rotating wheel. A mounting frame is fixed to the inner side of the telescopic plate. The rotating wheel is rotatably connected between the mounting frames. A telescopic cylinder is fixed between the outer side of the telescopic plate and the side wall of the base frame.

[0006] Preferably, the mounting brackets are rotatably connected by a drive shaft, a drive motor that drives the drive shaft to rotate is fixed on the outside of the mounting bracket, and the rotating wheels are fixed on the drive shaft and are evenly distributed.

[0007] Preferably, the rotating wheel and the traveling wheel are distributed vertically and their rotation directions are perpendicular to each other, and the upper end of the traveling wheel is lower than the bottom height of the rotating wheel.

[0008] Preferably, a set of hydraulic cylinders is fixed in the middle of the bottom of the base frame, and a support plate is fixed at the output end of the hydraulic cylinders. The support plate is located between the traveling wheels, the upper end of the support plate has a V-shaped structure, and a guide hole is opened on the outer side of the support plate. A guide rod is fixed at the bottom of the base frame at a position corresponding to the guide hole.

[0009] Preferably, both ends of the bottom frame are fixed with end frames, and the upper ends of the end frames are all arc-shaped structures.

[0010] Preferably, a track groove is provided on the upper ends of both sides of the bottom frame, a track block is slidably connected in the track groove, a bottom sliding frame is fixed at the bottom of the detection frame, the upper end of the track block is fixed to the bottom sliding frame, a threaded rod is rotatably connected in the track groove, the threaded rod passes through the track block and is threadedly connected to the track block, a synchronous motor is fixed at the end of the track groove, and the output end of the synchronous motor is fixed at the end of the threaded rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are: when using an ultrasonic testing head for non-destructive testing, the sliding of the testing frame can be used to realize the detection of straight welds, and the rotation of the rotating wheel can drive the pressure vessel to rotate, realizing the detection of circumferential welds, without the need for excessive flipping and moving of the pressure vessel, thus reducing the difficulty of testing. Attached Figure Description

[0012] Figure 1 This is a top view of the external structure of a pressure vessel weld inspection device according to the present invention.

[0013] Figure 2 This is a side sectional view of the pressure vessel weld inspection device of this utility model;

[0014] Figure 3 This is a schematic diagram of the combined structure of the telescopic plate and the rotating wheel of a pressure vessel weld inspection device according to this utility model;

[0015] Figure 4 This utility model relates to a pressure vessel weld inspection device. Figure 2 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Base frame; 11. Track groove; 12. Track block; 13. Threaded rod; 14. Synchronous motor; 2. End frame; 3. Detection frame; 31. Ultrasonic detection head; 32. Rangefinder; 33. Bottom sliding frame; 4. Traveling wheel; 41. Base; 5. Rotating wheel; 51. Telescopic plate; 52. Mounting frame; 53. Drive shaft; 54. Drive motor; 55. Telescopic cylinder; 6. Support plate; 61. Hydraulic cylinder; 62. Guide rod. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-4 This utility model provides a technical solution: including a base frame 1 and a testing frame 3. The testing frame 3 is slidably connected to the upper end of the base frame 1 and has an arc structure. An ultrasonic testing head 31 is fixed in the middle of the inner side of the testing frame 3. A pair of rangefinders 32 are fixed on the inner side wall of the testing frame 3. A set of traveling wheels 4 are rotatably connected inside the base frame 1. A base 41 is fixed on the inner side wall of the base frame 1 at a position corresponding to the traveling wheels 4. A driving device for rotating the traveling wheels 4 is fixed inside the base 41. A rotating wheel 5 is rotatably connected to the side wall of the base frame 1 above the traveling wheels 4. A telescopic plate 51 is installed on the side wall of the base frame 1 at a position corresponding to the rotating wheel 5. A mounting frame 52 is fixed inside the telescopic plate 51. The rotating wheel 5 is rotatably connected between the mounting frames 52. A telescopic cylinder 55 is fixed between the outer side of the telescopic plate 51 and the side wall of the base frame 1. End frames 2 are fixed at both ends of the base frame 1. The upper ends of the end frames 2 are all arc structures.

[0019] A drive shaft 53 is rotatably connected between the mounting brackets 52. A drive motor 54 that drives the drive shaft 53 to rotate is fixed on the outside of the mounting brackets 52. The rotating wheels 5 are fixed on the drive shaft 53 and are evenly distributed. The rotating wheels 5 and the traveling wheels 4 are distributed vertically and their rotation directions are perpendicular to each other. The upper end of the traveling wheels 4 is lower than the bottom of the rotating wheels 5. A set of hydraulic cylinders 61 is fixed in the middle of the bottom of the base frame 1. A support plate 6 is fixed at the output end of the hydraulic cylinders 61. The support plate 6 is located between the traveling wheels 4. The upper end of the support plate 6 has a V-shaped structure. A guide hole is opened on the outside of the support plate 6. A guide rod 62 is fixed at the bottom of the base frame 1 and at the position corresponding to the guide hole.

[0020] The upper ends of both sides of the bottom frame 1 are provided with track grooves 11, and track blocks 12 are slidably connected in the track grooves 11. The bottom of the detection frame 3 is fixed with a bottom sliding frame 33. The upper end of the track block 12 is fixed to the bottom sliding frame 33. A threaded rod 13 is rotatably connected in the track groove 11. The threaded rod 13 passes through the track block 12 and is threadedly connected to the track block 12. A synchronous motor 14 is fixed at the end of the track groove 11, and the output end of the synchronous motor 14 is fixed at the end of the threaded rod 13.

[0021] Working principle: First, connect the entire device to an external power source. Then, push the pressure vessel into the bottom frame 1 through the end frame 2. At this time, the pressure vessel will be placed on two sets of traveling wheels 4. Using the drive device in the base 41 to drive the traveling wheels 4 to rotate, the pressure vessel can be moved to a designated position in the bottom frame 1, so that the weld point position is aligned with the ultrasonic testing head 31. Then, weld seam inspection is performed at the weld point position. If the weld seam is long and narrow, the sliding of the testing frame 3 can be used to drive the ultrasonic testing head 31 to move horizontally, ultimately achieving the purpose of linear inspection. When circumferential weld seam inspection is required, first, the hydraulic cylinder 61 is used to drive the support plate 6 to move upward, lifting the entire pressure vessel until it is separated from the traveling wheels 4. Then, the telescopic cylinder 55 is used to drive the telescopic plate 51 to extend and retract, so that the rotating wheel 5 When the pressure vessel is in contact with the outer perimeter of the pressure vessel, the drive motor 54 drives the drive shaft 53 and the rotating wheel 5 to rotate, which in turn drives the pressure vessel to rotate, thus achieving the purpose of circumferential weld inspection. Before rotating the pressure vessel, the distance between the inner walls on both sides of the inspection frame 3 and the pressure vessel can be measured using the rangefinder 32. If the distances are consistent, it means that the pressure vessel is in the middle position inside the bottom frame 1. Otherwise, there is a deviation, and the telescopic plate 51 needs to be extended or retracted in time for adjustment. When the inspection frame 3 slides, the synchronous motor 14 drives the threaded rods 13 on both sides to rotate synchronously, which in turn drives the track block 12 to slide synchronously, ultimately driving the inspection frame 3 to slide. The operation is simple and convenient. During the inspection process, there is no need to move or transport the pressure vessel, and weld inspection at any position can be achieved, which improves work efficiency.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure vessel weld inspection device, comprising a base frame (1) and an inspection frame (3), characterized in that: The testing frame (3) is slidably connected to the upper end of the bottom frame (1) and has an arc structure. An ultrasonic testing head (31) is fixed in the middle of the inner side of the testing frame (3). A pair of rangefinders (32) are fixed on the inner side wall of the testing frame (3). A set of traveling wheels (4) is rotatably connected inside the bottom frame (1). A base (41) is fixed on the inner side wall of the bottom frame (1) at a position corresponding to the traveling wheels (4). A driving device for rotating the traveling wheels (4) is fixed inside the base (41). A rotating wheel (5) is rotatably connected on the side wall of the bottom frame (1) above the traveling wheels (4). A telescopic plate (51) is installed on the side wall of the bottom frame (1) at a position corresponding to the rotating wheel (5). An installation frame (52) is fixed on the inner side of the telescopic plate (51). The rotating wheel (5) is rotatably connected between the installation frames (52). A telescopic cylinder (55) is fixed between the outer side of the telescopic plate (51) and the side wall of the bottom frame (1).

2. The pressure vessel weld inspection device according to claim 1, characterized in that: The mounting brackets (52) are rotatably connected to a drive shaft (53). A drive motor (54) that drives the drive shaft (53) to rotate is fixed on the outside of the mounting brackets (52). The rotating wheels (5) are fixed on the drive shaft (53) and are evenly distributed.

3. The pressure vessel weld inspection device according to claim 1, characterized in that: The rotating wheel (5) and the traveling wheel (4) are distributed vertically and their rotation directions are perpendicular to each other. The upper end of the traveling wheel (4) is lower than the bottom height of the rotating wheel (5).

4. The pressure vessel weld inspection device according to claim 1, characterized in that: A set of hydraulic cylinders (61) is fixed in the middle of the bottom of the base frame (1). A support plate (6) is fixed at the output end of the hydraulic cylinder (61). The support plate (6) is located between the traveling wheels (4). The upper end of the support plate (6) has a V-shaped structure. A guide hole is opened on the outer side of the support plate (6). A guide rod (62) is fixed at the bottom of the base frame (1) at a position corresponding to the guide hole.

5. The pressure vessel weld inspection device according to claim 1, characterized in that: Both ends of the bottom frame (1) are fixed with end frames (2), and the upper ends of the end frames (2) are all arc structures.

6. The pressure vessel weld inspection device according to claim 1, characterized in that: The bottom frame (1) has a track groove (11) on both sides of the upper end. A track block (12) is slidably connected in the track groove (11). A bottom slide frame (33) is fixed at the bottom of the detection frame (3). The upper end of the track block (12) is fixed to the bottom slide frame (33). A threaded rod (13) is rotatably connected in the track groove (11). The threaded rod (13) passes through the track block (12) and is threadedly connected to the track block (12). A synchronous motor (14) is fixed at the end of the track groove (11), and the output end of the synchronous motor (14) is fixed at the end of the threaded rod (13).

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