A kind of titanium pressure vessel weld quality automatic detection device

Abstract

This invention belongs to the field of weld inspection technology, and specifically relates to an automatic inspection device for the weld quality of titanium pressure vessels. It includes several bases evenly distributed around the outside of a cylindrical vessel, with a detection probe mounted on top of each base. It also includes several connecting straps evenly distributed around the outside of the cylindrical vessel, positioned between two bases on the same side. Each base is equipped with a winding mechanism for reeling in the connecting straps. This invention enables non-destructive testing of welds in titanium pressure vessels, achieving automatic scanning without manual operation, improving work efficiency, ensuring the stability of the probe's lift-off distance, improving the accuracy of test results, and is easy to carry and move. It is suitable for post-weld inspection and subsequent periodic inspections, and is applicable to weld inspection of titanium pressure vessels of different diameters, as well as pipe weld inspection of different diameters, demonstrating good adaptability.

Description

Technical Field

[0001] This invention belongs to the field of weld inspection technology, and in particular relates to an automatic inspection device for the weld quality of titanium pressure vessels. Background Technology

[0002] Titanium pressure vessels are widely used in chemical, aerospace, and marine engineering fields due to their excellent corrosion resistance, high strength, and good low-temperature performance. As a key stress-bearing and sealing part, the weld seam directly determines the pressure-bearing safety and operational stability of the equipment. Not only is weld seam inspection required after welding, but it is also necessary to regularly inspect the weld seam during the use of titanium vessels.

[0003] Currently, electromagnetic detection probes are a type of non-destructive testing device for weld quality. They do not require grinding of the weld or the surface coating and are widely used in various weld inspections. For example, the electromagnetic detection device for fillet welds disclosed in patent publication number CN220894278U emits an alternating electromagnetic field. The electromagnetic field penetrates the surface of the weld and induces eddy currents inside. If there are defects such as cracks or corrosion pits in the weld, they will block or disturb the eddy current path, causing abnormalities in the impedance, magnetic field components, and other signals of the electromagnetic field. After the probe receiving module captures these abnormal signals, it can identify the defects and obtain their location, size, and other information through algorithm inversion.

[0004] Titanium pressure vessels have multiple welds, such as the circumferential weld of the tank body and pipe joints. To adapt to the inspection of different welds, manual handheld pen-type electromagnetic detection probes are usually used to scan and inspect along the weld path. However, the lifting distance of the pen-type electromagnetic detection probe is not easy to control (the lifting distance is generally required to be within 5mm), which may lead to deviations in the inspection results. While using high-precision equipment such as robotic arms to control the electromagnetic detection probe to automatically inspect the welds can improve accuracy, it results in large equipment size, high cost, and extreme inconvenience in use. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an automatic inspection device for the weld quality of titanium pressure vessels.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic inspection device for weld quality of titanium pressure vessels, comprising a plurality of bases evenly distributed around the outside of a cylindrical vessel, each base having a detection probe disposed above it, and further comprising:

[0007] Several connecting strips are evenly distributed around the outside of the cylindrical container, and the connecting strips are positioned between two bases on the same side. Each base is equipped with a winding mechanism for winding the connecting strips.

[0008] A walking unit is installed inside the base, and the base travels along the outside of the columnar container via the walking unit;

[0009] Several support mechanisms are installed on the top of the corresponding base, and the detection probe is installed on the support mechanism.

[0010] Preferably, the winding mechanism includes a take-up wheel, and the base has a take-up cavity that matches the take-up wheel. The take-up wheel is rotatably disposed inside the take-up cavity. The connecting belt is wound around the outside of the take-up wheel. The movable end of the connecting belt slides through the take-up cavity, and a connecting component is installed on the movable end of the connecting belt. The connecting belt is connected to the corresponding base through the connecting component. A first locking and limiting component is installed on the axle of the take-up wheel.

[0011] Preferably, the connecting assembly includes a movable block fixed to the movable end of the connecting belt, and a fixed block is fixedly installed on the side wall of the base, and the movable block and the fixed block are fixed relative to each other by bolts.

[0012] Preferably, the first locking and limiting assembly includes a first limiting disc fixed to the end of the winding wheel axle, a first limiting rod threadedly connected to the eccentric part of the first limiting disc, and a first anti-slip block fixed to the end of the first limiting rod near the base.

[0013] Preferably, the walking unit includes multiple sets of walking wheels. The side wall of the base near the cylindrical container has an installation groove. Two walking wheels in the same set are rotatably disposed on both sides inside the installation groove, and the walking wheels abut against the outer side wall of the cylindrical container. A drive motor is installed at the bottom of the base, and the output shaft of the drive motor is rotatably connected to the groove wall of the installation groove. A gear transmission assembly is installed at one end of the output shaft of the drive motor inside the installation groove, and the output shaft of the drive motor drives the two walking wheels on the same side to rotate in the same direction through the gear transmission assembly.

[0014] Preferably, the support mechanism includes support blocks fixedly installed on both sides of the top of the base, the support blocks are rotatably connected to the mounting blocks by axle pins, and the rod end of the axle pin is equipped with a second locking and limiting component, and the detection probe is detachably installed on the side wall of the mounting block.

[0015] Preferably, the second locking and limiting assembly includes a second limiting disc fixed to the end of the shaft pin, a second limiting rod threadedly connected to the eccentric part of the second limiting disc, and a second anti-slip block fixed to one end of the second limiting rod near the support block.

[0016] Preferably, an adjustment block is provided on one side of the base, the support mechanism is installed on the side wall of the adjustment block away from the base, an extension block is fixedly installed on the side wall of the base, and a miniature electric push rod is fixedly inserted into the side wall of the extension block, the movable end of the miniature electric push rod is fixedly connected to the side wall of the adjustment block.

[0017] Compared with existing technologies, the advantages of an automatic inspection device for weld quality in titanium pressure vessels are:

[0018] 1. By cooperating with several bases and detection probes, non-destructive testing of weld quality can be performed through electromagnetic detection. Furthermore, the cooperation of the connecting belt and the traveling unit allows the detection probes to travel along the annular surface of the titanium pressure vessel, enabling automatic weld inspection without the need for manual scanning, thus improving work efficiency. The distance between the detection probe and the weld is sufficiently stable, effectively enhancing the stability of the inspection results. Moreover, its small size makes it easy to carry and move. It is not only suitable for post-weld inspection of titanium pressure vessels but also for subsequent periodic inspections of the welds.

[0019] 2. The winding mechanism can be flexibly adjusted according to titanium pressure vessels of different diameters, increasing adaptability. In addition, the connection components can be adjusted by increasing or decreasing the number of bases and detection probes, which not only further increases the adaptability range of titanium pressure vessels of different diameters, but also allows it to be installed on pipelines. With the support mechanism, the angle of the detection probe can be adjusted to detect the pipe joint welds at the pipelines connected to the titanium pressure vessels.

[0020] 3. By cooperating with the adjustable block, extension block and miniature electric actuator, the distance between the detection probe and the weld can be adjusted when the weld between the pipeline and the titanium pressure vessel is inclined, thereby further improving the coverage of the weld inspection of the titanium pressure vessel. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of an automatic inspection device for weld quality of titanium pressure vessels provided by the present invention;

[0022] Figure 2 This is a side-view three-dimensional structural schematic diagram of Embodiment 1 of an automatic inspection device for weld quality of titanium pressure vessels provided by the present invention;

[0023] Figure 3 This is an embodiment 1 of an automatic inspection device for weld quality of titanium pressure vessels provided by the present invention. Figure 2 Enlarged view of the structure of section A;

[0024] Figure 4 This is a top view of the base on the columnar container in Embodiment 1 of an automatic inspection device for weld quality of titanium pressure vessels provided by the present invention.

[0025] Figure 5This is a schematic diagram of the connection structure of the two bases in Embodiment 1 of an automatic inspection device for weld quality of titanium pressure vessels provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the base installed on the pipeline in Embodiment 1 of the automatic detection device for weld quality of titanium pressure vessels provided by the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the base installed on the pipeline in Embodiment 2 of an automatic inspection device for weld quality of titanium pressure vessels provided by the present invention.

[0028] In the diagram: 1. Columnar container, 2. Base, 3. Detection probe, 4. Connecting belt, 5. Winding mechanism, 51. Take-up wheel, 52. Take-up cavity, 6. Walking unit, 61. Walking wheel, 62. Mounting slot, 63. Drive motor, 64. Gear transmission assembly, 7. Support mechanism, 71. Support block, 72. Mounting block, 8. Connecting assembly, 81. Movable block, 82. Fixing block, 9. First locking limit assembly, 91. First limit plate, 92. First limit rod, 93. First anti-slip block, 10. Second locking limit assembly, 101. Second limit plate, 102. Second limit rod, 103. Second anti-slip block, 11. Adjusting block, 12. Extension block, 13. Miniature electric push rod. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Example 1:

[0031] like Figures 1-6 As shown, an automatic inspection device for weld quality of titanium pressure vessels includes several bases 2 evenly distributed around the outside of a cylindrical container 1. Each base 2 is equipped with a detection probe 3. The device also includes several connecting straps 4 evenly distributed around the outside of the cylindrical container 1 and positioned between two bases 2 on the same side. Each base 2 is equipped with a winding mechanism 5 for winding the connecting straps 4. The winding mechanism 5 includes a winding wheel 51. The base 2 has a winding cavity 52 that matches the winding wheel 51. The winding wheel 51 is rotatably disposed inside the winding cavity 52. ​​The connecting straps 4 are wound around the outside of the winding wheel 51. The movable end of the connecting straps 4 slides through the winding cavity 52. ​​A connecting component 8 is installed on the movable end of the connecting straps 4. The connecting component 8 includes a movable block 81 fixed to the movable end of the connecting straps 4. A fixing block 82 is fixedly installed on the side wall of the base 2. The movable block 81 and the fixing block 82 are fixed relative to each other by bolts.

[0032] The connecting belt 4 is connected to the corresponding base 2 through the connecting component 8. The axle of the take-up reel 51 is equipped with a first locking and limiting component 9. The first locking and limiting component 9 includes a first limiting disc 91 fixed to the end of the axle of the take-up reel 51. A first limiting rod 92 is threadedly connected to the eccentric part of the first limiting disc 91, and a first anti-slip block 93 is fixed to the end of the first limiting rod 92 near the base 2. Under the frictional force between the first anti-slip block 93 and the side wall of the base 2, the stability of the take-up reel 51 can be ensured.

[0033] The walking unit 6 is installed inside the base 2, and the base 2 travels along the outside of the cylindrical container 1 through the walking unit 6. The walking unit 6 includes multiple sets of walking wheels 61. The side wall of the base 2 near the cylindrical container 1 is provided with a mounting groove 62. Two walking wheels 61 in the same set are rotatably arranged on both sides inside the mounting groove 62, and the walking wheels 61 abut against the outer side wall of the cylindrical container 1. A drive motor 63 is installed at the bottom of the base 2, and the output shaft of the drive motor 63 is rotatably connected to the groove wall of the mounting groove 62. A gear transmission assembly 64 is installed at one end of the output shaft of the drive motor 63 inside the mounting groove 62, and the output shaft of the drive motor 63 drives the two walking wheels 61 on the same side to rotate in the same direction through the gear transmission assembly 64. The gear transmission assembly 64 includes at least a driving gear and two driven gears. The driving gear is placed between the two driven gears, and the driving gear meshes with the two driven gears.

[0034] Several support mechanisms 7 are installed on the top of the corresponding base 2. The detection probe 3 is installed on the support mechanism 7. The support mechanism 7 includes support blocks 71 fixedly installed on both sides of the top of the base 2. The support blocks 71 are rotatably connected to the mounting blocks 72 through the shaft pins. The rod end of the shaft pin is equipped with a second locking and limiting assembly 10. The detection probe 3 is detachably installed on the side wall of the mounting block 72. The second locking and limiting assembly 10 includes a second limiting plate 101 fixed to the end of the shaft pin. The eccentric part of the second limiting plate 101 is threadedly connected to a second limiting rod 102. The end of the second limiting rod 102 near the support block 71 is fixed with a second anti-slip block 103, which can ensure the angular stability of the mounting block 72.

[0035] In this embodiment, when performing quality inspection on the annular weld of the cylindrical container 1, the bolts on one of the movable blocks 81 and the fixed block 82 are unscrewed, separating the movable block 81 from the fixed block 82. The entire device is then encircled around the outside of the cylindrical container 1, with the detection probe 3 at the same height as the annular weld. The separated movable block 81 and fixed block 82 are then re-fixed with bolts. Next, the first limiting rods 92 at each winding wheel 51 are turned, causing the first anti-slip block 93 to detach from the base 2. Rotating the first limiting disc 91 drives the winding wheel 51 to rotate, allowing the winding wheel 51 to wind and coil the connecting belt 4, thereby... The connecting belt 4 is tightened so that the traveling wheels 61 at each base 2 abut against the outer wall of the cylindrical container 1. The circumferential binding force applied to the base 2 by the connecting belt 4 prevents the base 2 from moving in the axial direction of the cylindrical container 1, ensuring the stability of the base 2. Then, the first limiting rod 92 is retightened so that the first anti-slip block 93 abuts against the side wall of the base 2, ensuring that the first limiting plate 91 does not rotate, thereby limiting and fixing the winding wheel 51. After installation, the entire device is connected to the interface of an external controller (not a PLC controller). The controller is powered by an external power supply, and the detection work is started through the external controller.

[0036] After the detection work is started, the controller controls the drive motor 63 to work. The drive motor 63 drives two sets of walking wheels 61 on the same side to rotate in the same direction through the gear transmission assembly 64. When the walking wheels 61 at each base 2 rotate in the same direction, each base 2 begins to move along the circumference of the columnar container 1, thereby driving each detection probe 3 to move along the weld. When the controller starts the drive motor 63, the detection probe 3 is started synchronously. The detection probe 3 can detect weld defects (taking electromagnetic detection as an example, the detection probe 3 emits an alternating electromagnetic field to the weld. The electromagnetic field penetrates the surface of the weld and induces eddy currents inside. If there are defects such as cracks or corrosion pits in the weld, they will block or disturb the eddy current path, causing abnormalities in the impedance, magnetic field components and other signals of the electromagnetic field. After the detection probe 3 receiving module captures these abnormal signals, it feeds the signals back to the controller. The controller displays and records the defect information). As the base 2 moves, the detection probe 3 conducts a full-coverage detection of the weld. After the detection is completed, the movable block 81 and the fixed block 82 are separated again, and the entire device can be removed.

[0037] Reference Figure 5 and Figure 6When inspecting the pipe weld perpendicular to the columnar container 1, select an appropriate number of bases 2 according to the pipe diameter and place them around the pipe. Then fix the movable block 81 and the corresponding fixed block 82, and with the connecting strap 4, make the entire device surround the outside of the pipe. Then tighten the connecting strap 4 according to the aforementioned method to make the entire device maintain sufficient stability in the axial direction of the pipe. Next, loosen the second limit rod 102 so that the second anti-sliding block 103 disengages from the support block 71, and rotate the mounting block 72 to adjust the angle of the detection probe 3 so that the detection end of the detection probe 3 faces the pipe joint. Then tighten the second limit rod 102 so that the second anti-sliding block 103 abuts against the side wall of the support block 71 to ensure the angular stability of the mounting block 72. Then connect the controller and follow the aforementioned steps to complete the inspection of the pipe joint.

[0038] Example 2:

[0039] Reference Figure 7 The difference between this embodiment and Embodiment 1 is that:

[0040] An adjustment block 11 is provided on one side of the base 2. The support mechanism 7 is installed on the side wall of the adjustment block 11 away from the base 2. An extension block 12 is fixedly installed on the side wall of the base 2, and a miniature electric push rod 13 is fixedly inserted into the side wall of the extension block 12. The movable end of the miniature electric push rod 13 is fixedly connected to the side wall of the adjustment block 11.

[0041] In this embodiment, when the weld at the connection between the pipe and the columnar container 1 is inclined, after the entire device is installed on the outside of the pipe, the vertical distance between the detection probe 3 and the weld is different in different directions. In order to successfully detect the weld, the controller controls the micro electric push rod 13 to work through pre-programming, thereby adjusting the position of the adjustment block 11 and thus adjusting the distance between the detection probe 3 and the weld. During the movement of the base 2, the micro electric push rod 13 adjusts the distance between the detection probe 3 and the weld in real time according to the preset program to ensure that the lifting distance between the detection probe 3 and the weld remains stable, so as to meet the defect detection of such inclined welds.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic inspection device for weld quality of a titanium pressure vessel, comprising a plurality of bases (2) evenly distributed around the outside of a cylindrical vessel (1), wherein a detection probe (3) is disposed above each base (2), characterized in that, Also includes: Several connecting strips (4) are evenly distributed around the outside of the columnar container (1), and the connecting strips (4) are arranged between two bases (2) on the same side. Each base (2) is equipped with a winding mechanism (5) for winding the connecting strips (4). The walking unit (6) is installed inside the base (2), and the base (2) moves along the outside of the columnar container (1) via the walking unit (6); Several support mechanisms (7) are installed on the top of the corresponding base (2), and the detection probe (3) is installed on the support mechanism (7); The winding mechanism (5) includes a take-up wheel (51), and the base (2) has a take-up cavity (52) that matches the take-up wheel (51). The take-up wheel (51) is rotatably disposed inside the take-up cavity (52). The connecting belt (4) is wound around the outside of the take-up wheel (51). The movable end of the connecting belt (4) slides through the take-up cavity (52), and the movable end of the connecting belt (4) is equipped with a connecting component (8). The connecting belt (4) is connected to the corresponding base (2) through the connecting component (8). The axle of the take-up wheel (51) is equipped with a first locking and limiting component (9). The first locking and limiting assembly (9) includes a first limiting plate (91) fixed to the end of the axle of the take-up reel (51), a first limiting rod (92) is threadedly connected to the eccentric part of the first limiting plate (91), and a first anti-slip block (93) is fixed to one end of the first limiting rod (92) near the base (2). An adjustment block (11) is provided on one side of the base (2). The support mechanism (7) is installed on the side wall of the adjustment block (11) away from the base (2). An extension block (12) is fixedly installed on the side wall of the base (2), and a miniature electric push rod (13) is fixedly inserted into the side wall of the extension block (12). The movable end of the miniature electric push rod (13) is fixedly connected to the side wall of the adjustment block (11).

2. The automatic inspection device for weld quality of titanium pressure vessels according to claim 1, characterized in that, The connecting assembly (8) includes a movable block (81) fixed to the movable end of the connecting band (4), and a fixed block (82) is fixedly installed on the side wall of the base (2), and the movable block (81) and the fixed block (82) are fixed relative to each other by bolts.

3. The automatic inspection device for weld quality of titanium pressure vessels according to claim 1, characterized in that, The walking unit (6) includes multiple sets of walking wheels (61). The base (2) has an installation groove (62) on the side wall near the columnar container (1). Two walking wheels (61) in the same set are rotatably arranged on both sides inside the installation groove (62), and the walking wheels (61) abut against the outer side wall of the columnar container (1). A drive motor (63) is installed at the bottom of the base (2), and the output shaft of the drive motor (63) is rotatably connected to the groove wall of the installation groove (62). A gear transmission assembly (64) is installed at one end of the output shaft of the drive motor (63) inside the installation groove (62), and the output shaft of the drive motor (63) drives the two walking wheels (61) on the same side to rotate in the same direction through the gear transmission assembly (64).

4. The automatic inspection device for weld quality of titanium pressure vessels according to claim 1, characterized in that, The support mechanism (7) includes support blocks (71) fixedly installed on both sides of the top of the base (2). The support blocks (71) are rotatably connected to the mounting blocks (72) by axle pins, and the rod end of the axle pin is equipped with a second locking and limiting assembly (10). The detection probe (3) is detachably installed on the side wall of the mounting block (72).

5. The automatic inspection device for weld quality of titanium pressure vessels according to claim 4, characterized in that, The second locking and limiting assembly (10) includes a second limiting plate (101) fixed to the end of the shaft pin. The second limiting plate (101) is threadedly connected to a second limiting rod (102) at its eccentric part, and a second anti-slip block (103) is fixed to one end of the second limiting rod (102) near the support block (71).

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