A weld inspection scanning frame

Abstract

This invention relates to the field of weld inspection technology, and more particularly to a weld inspection scanning frame, comprising: a scanning frame body; a moving inspection component, which includes a scanner and a moving mechanism; and a welding component, which is mounted on an upper support and includes a scraping mechanism, a feeding mechanism, and a welding torch. In use, the worker controls the moving mechanism via a remote control to move the entire scanning frame along the weld point. After the scanner detects a weld crack, the welding component scrapes off the cracked weld point and re-welds it. The entire process does not require workers to perform high-altitude operations; the re-welding process is automatically completed by the welding torch and the feeding mechanism, resulting in a high degree of automation. Because undried welding rods contain a lot of moisture and often have oil stains on their surface, the processing device cleans and dries the welding rods, effectively preventing the large amount of hydrogen elements decomposed from the welding rods after high-temperature spot welding from entering the weld point and causing cold cracks to reappear.

Description

Technical Field

[0001] This invention relates to the field of weld inspection technology, specifically a weld inspection scanning frame. Background Technology

[0002] Welding is a crucial process in steel shipbuilding, accounting for approximately 30% of the total construction time and about 1.5% of the hull's metal weight. In shipbuilding, especially for smaller vessels like passenger ferries and transport boats, where hull lines vary significantly and dimensions are relatively small, welding is often done manually. Even in the construction of larger ships, manual arc welding constitutes a large proportion. The quality of manual arc welds is related to the welder's skill, the equipment used, and the working environment.

[0003] Due to the inherent errors in manual welding, weld defects such as slag inclusions, porosity, and cracks often occur after welding. Among these defects, weld cracks are the most serious. Weld cracks cause severe stress concentration, reduce the effective working cross-section, and damage the impermeability of the weld joint, thus worsening the ship's anti-sinking performance. As time goes on, the cracks continue to expand, eventually leading to the fracture of the welded components. Moreover, cold cracks in weld cracks have a delayed nature; some appear immediately after welding, while others develop hours, days, or even months later. Therefore, it is very difficult to detect weld cracks in a timely manner during the shipbuilding process. Thus, it is crucial to detect and promptly address weld cracks in the hull structure during routine inspections of the ship.

[0004] To address the aforementioned issues, the current method for inspecting and re-welding ship hull welds is mostly manual. However, large ships are often hundreds of meters high, making manual inspection difficult. After cracks are detected, workers are required to perform high-altitude welding, which is also quite dangerous. Furthermore, manual re-welding still introduces errors, making it easy for weld cracks to reappear. Summary of the Invention

[0005] The purpose of this invention is to provide a weld inspection scanning frame to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A weld inspection scanning frame, comprising:

[0008] The scanning frame body includes an upper support and several support rods;

[0009] A motion detection assembly, comprising a scanner and a motion mechanism, the motion mechanism being used to move the scanning frame body along the path scanned by the scanner; and

[0010] A welding assembly is disposed on the upper support. The welding assembly includes a scraping mechanism, a feeding mechanism, and a welding torch. The scraping mechanism is used to scrape off weld points with weld cracks detected by the scanner. The feeding mechanism is used to feed welding rods when the welding torch welds the scraped weld points.

[0011] Preferably, a lifting push rod is provided between the upper bracket and each of the support rods, and the lifting push rod is used to adjust the distance between the upper bracket and the support rod.

[0012] Preferably, the moving mechanism includes a magnetic block and a moving wheel, the magnetic block being disposed inside the moving wheel, and the moving wheel being connected to the support rod.

[0013] Preferably, four support rods are provided, and four corresponding movable wheels are provided.

[0014] Preferably, the removal mechanism includes an angle rotating wheel, a grinder, and a rangefinder. The angle rotating wheel is rotatably connected to the upper support, the grinder is connected to the angle rotating wheel, and the rangefinder is mounted on the upper support.

[0015] Preferably, the welding torch is fixedly connected to the upper support. The feeding mechanism includes a storage box, a pressing push rod, a welding rod pusher, a processing device, and a conveying device. The storage box has a feeding chamber and a cleaning chamber. The pressing push rod and the welding rod pusher are both located in the feeding chamber. The pressing push rod is used to control the material discharge from the storage box. The welding rod pusher is used to push the welding rod from the feeding chamber to the cleaning chamber. The processing device is located in the cleaning chamber and is used to clean the welding rod. The conveying device is used to deliver the cleaned welding rod to the welding point.

[0016] Preferably, the storage box includes a pressing block, a moving plate, a support block, and a return spring. The pressing block is fixedly connected to the moving plate, the support block is disposed at the bottom of the inner cavity of the storage box, and the support block is used to provide a fulcrum for the angular rotation of the moving plate. The return spring is connected to the side of the moving plate away from the pressing block.

[0017] Preferably, the storage box includes a pressing block, a moving plate, a support block, and a return spring. The pressing block is fixedly connected to the moving plate, and the support block is disposed within the storage box. The processing device includes a cleaning block, a transmission wheel, and a dryer. Two sets of cleaning blocks and transmission wheels are provided, symmetrically arranged on both sides of the cleaning chamber. The transmission wheel is used to move the welding rod after the welding rod pusher pushes it into the cleaning chamber. The dryer is used to dry the welding rod after the cleaning block cleans it. At the bottom of the chamber, the support block provides a fulcrum for the angular rotation of the moving plate, and the return spring is connected to the side of the moving plate away from the pressing block.

[0018] Preferably, the processing device includes a cleaning block, a drive wheel, and a dryer. Two sets of cleaning blocks and drive wheels are provided, and the two sets of cleaning blocks and drive wheels are symmetrically arranged on both sides of the cleaning chamber. The drive wheel is used to drive the welding rod to move after the welding rod pusher pushes the welding rod into the cleaning chamber. The dryer is used to dry the welding rod after the cleaning block cleans the welding rod.

[0019] Preferably, the conveying device includes a mounting rod, a conveying rod, a guide wheel rod, and a distance sensor. The mounting rod is connected to the upper bracket, the conveying rod is connected to the mounting rod, the guide wheel rod is disposed inside the conveying rod, and the guide wheel rod is used to deliver the welding rod to the welding point. The distance sensor is disposed inside the conveying rod, and the distance sensor is used to detect the length of the welding rod.

[0020] Compared with the prior art, the beneficial effects of this invention are as follows: During use, the worker controls the moving mechanism via a remote control device to move the entire scanning frame along the weld point. After the scanner detects a weld crack, the cracked weld point is removed by the welding assembly and then re-welded. The entire process does not require workers to perform high-altitude operations. The re-welding process is automatically completed by the welding torch and the feeding mechanism, resulting in a high degree of automation. Since the undried welding rod contains a lot of moisture and the surface of the welding rod is often covered with oil, the processing device cleans and dries the welding rod, which can effectively prevent a large amount of hydrogen elements decomposed after the welding rod is spot-welded at high temperature from entering the weld point and causing cold cracks to reappear. This reduces the occurrence of weld cracks and is worthy of widespread promotion. Attached Figure Description

[0021] Figure 1 This is an isometric view of the structure of the present invention (grinding machine in operation, for ease of illustration). Figures 1 to 3 (All parts, including a support rod and its connecting parts, are omitted.)

[0022] Figure 2 This is an isometric view of the present invention (with the conveyor rod and storage box in docking state).

[0023] Figure 3 This is an isometric view of the structure of the present invention (welding torch in working state).

[0024] Figure 4 This is a side view of the structure of the present invention;

[0025] Figure 5 This is a side view of the storage box structure of the present invention;

[0026] Figure 6 This is an isometric view of the storage box structure of the present invention (with a section of the storage box side wall cut open).

[0027] Figure 7 This is a schematic diagram of the internal structure of the conveyor rod of the present invention.

[0028] In the diagram: 1. Scanning frame body, 2. Upper bracket, 3. Support rod, 4. Scanner, 5. Lifting push rod, 6. Magnetic block, 7. Moving wheel, 8. Welding gun, 10. Angle rotating wheel, 11. Grinding machine, 12. Rangefinder, 13. Storage box, 14. Pressing push rod, 15. Welding rod push rod, 16. Feeding chamber, 17. Cleaning chamber, 18. Pressing block, 19. Moving plate, 20. Support block, 21. Reset spring, 22. Baffle, 23. Discharge port, 24. Cleaning block, 25. Transmission wheel rod, 26. Dryer, 27. Mounting rod, 28. Conveying rod, 29. Guide wheel rod, 30. Range sensor, 100. Welding rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-7 The present invention provides a technical solution:

[0031] A weld inspection scanning frame, as shown in the instruction manual. Figure 1 As shown, it includes:

[0032] The scanning frame body 1 is used to install other components of the present invention. The scanning frame body 1 includes an upper bracket 2 and several support rods 3. The upper bracket 2 is used to install the scanner 4 and welding components. The support rods 3 are used to install the moving mechanism. A lifting push rod 5 is provided between the upper bracket 2 and each support rod 3. The lifting push rod 5 is an FD-3-A type electric push rod produced by Beijing Jinda Kainuo Transmission Equipment Co., Ltd. The lifting push rod 5 is located inside the support rod 3. The two ends of the lifting push rod 5 are fixedly connected to the upper bracket 2 and the support rod 3 respectively. The lifting push rod 5 is used to adjust the distance between the upper bracket 2 and the support rod 3.

[0033] The mobile inspection component includes a scanner 4 and a moving mechanism. The scanner 4 is a CCD camera with a data acquisition card. After the acquired data is processed by a PC, a working command is sent to the welding component. The CCD camera is a Le Rong RL-813 DCCD color camera. The moving mechanism is used to move the scanning frame body 1 along the path scanned by the scanner 4. The moving mechanism includes magnetic blocks 6 and moving wheels 7. The magnetic blocks 6 are used to attach the entire weld inspection scanning frame body 1 to the hull, thereby achieving the effect of working in a vertical plane. In this embodiment, the number of magnetic blocks 6 and moving wheels 7 is the same, with four of each. The magnetic blocks 6 are fixedly connected to both sides of the movable wheels 7. The magnetic blocks 6 are made of neodymium iron boron material. The strong magnetism of neodymium iron boron material can maintain the adsorption effect even when two or three movable wheels 7 are in contact with the side wall of the ship, thereby achieving the purpose of detection in different areas. The magnetic blocks 6 are set inside the movable wheels 7. The movable wheels 7 are connected to the support rods 3. The movable wheels 7 are Mecanum wheels. Mecanum wheels are omnidirectional wheels, which can make the side movement of the present invention without turning. The surface of the movable wheels 7 is made of polyurethane material. This material has high friction and is relatively soft, which can ensure sufficient driving friction without damaging the paint layer of the ship's hull. There are four support rods 3 and four movable wheels 7 are set accordingly.

[0034] The welding assembly is mounted on the upper support 2. The welding assembly includes a scraping mechanism, a feeding mechanism, and a welding torch 8. The scraping mechanism is used to scrape off weld points with weld cracks detected by the scanner 4. The feeding mechanism is used to feed the welding rod 100 when the welding torch 8 welds the scraped weld points. The welding torch 8 is fixedly connected to the upper support 2 and is used to perform secondary welding on the weld. Different types of welding torches 8 can be replaced according to the actual situation.

[0035] The removal mechanism includes an angle rotating wheel 10, a grinder 11, and a rangefinder 12. The angle rotating wheel 10 is rotatably connected to the upper bracket 2. The angle rotating wheel 10 is used to adjust the angle of the grinder 11 to achieve the purpose of adjusting the grinding angle and storing the grinder 11. The grinder 11 is fixedly connected to the angle rotating wheel 10. The rangefinder 12 is a XKC-KL200-V type infrared distance sensor produced by Shenzhen Xingkechuang Technology Co., Ltd. The rangefinder 12 is used to measure the distance from the grinder 11 to the weld point with weld cracks. The rangefinder 12 is fixedly connected to the upper bracket 2. Because the grinder 11 is fixedly connected to the angle rotating wheel 10, when the angle rotating wheel 10 drives the grinder 11 to move to the position closest to the side wall of the hull, the distance from the detection point of the rangefinder 12 is equal, which is called H1. The distance from the detection point of the rangefinder 12 to the weld is H2. Then the distance from the grinder 11 to the weld is H2-H1.

[0036] The feeding mechanism includes a storage box 13, a pressing push rod 14, a welding rod push rod 15, a processing device, and a conveying device. The storage box 13 is used to store and clean the welding rod 100. The storage box 13 has a feeding chamber 16 and a cleaning chamber 17. The feeding chamber 16 is used to connect the inner cavity of the storage box 13 and the cleaning chamber 17. The pressing push rod 14 and the welding rod push rod 15 are both located in the feeding chamber 16. The pressing push rod 14 and the welding rod push rod 15 are both NKLA76 model miniature linear electric push rods manufactured by Zhejiang Juying Intelligent Technology Co., Ltd. The pressing push rod 14 is used to control the material discharge from the storage box 13. The welding rod push rod 15 is used to push the welding rod 100 from the feeding chamber 16 to the cleaning chamber 17. The processing device is located in the cleaning chamber 17. The cleaning chamber 17 is used to install the processing device. The processing device is used to clean the welding rod 100. The conveying device is used to send the cleaned welding rod 100 to the welding point.

[0037] The storage box 13 includes a pressing block 18, a moving plate 19, a support block 20, and a return spring 21. A pressing push rod 14 is perpendicular to the pressing block 18. The welding rod push rod 15, the pressing block 18, and the inlet of the feeding chamber 16 are all concentrically arranged. When the pressing push rod 14 applies pressure to the pressing block 18, the welding rod 100 falls from the inner cavity of the storage box 13 through the outlet 23 onto the pressing block 18. At this time, the welding rod push rod 15 pushes the welding rod 100 into the feeding chamber 16. The pressing block 18 is fixedly connected to the moving plate 19, and the support block 20 is rotatably connected to the bottom of the inner cavity of the storage box 13. The support block 20 provides a fulcrum for the angular rotation of the moving plate 19. The reset spring 21 is connected to the side of the moving plate 19 away from the pressing block 18. The reset spring 21 is a tension spring. The height of the reset spring 21 under no external force is slightly lower than the height of the support block 20. A baffle 22 is provided on the side of the moving plate 19 near the pressing block 18. The baffle 22 is used to prevent a large number of welding rods 100 in the inner cavity of the storage box 13 from falling into the feeding chamber 16 when the angle of the moving plate 19 is deflected. A discharge port 23 is provided at the bottom of the baffle 22. The discharge port 23 is used to send the welding rods 100 in the inner cavity of the storage box 13 to the feeding chamber 16. The width of the discharge port 23 is the same as the width of the welding rod 100, so only one welding rod 100 can be released at a time.

[0038] The processing device includes a cleaning block 24, a drive wheel 25, and a dryer 26. The drive wheel 25, cleaning block 24, and dryer 26 are arranged sequentially along the direction of movement of the welding rod 100. There are two drive wheels 25, symmetrically arranged on both sides of the cleaning chamber 17. The drive wheels 25 are also made of rubber. The gap between the two opposing drive wheels 25 is slightly smaller than that of the welding rod 100. Therefore, when the welding rod 100 is inserted, the two drive wheels 25 will drive the welding rod 100 to move. The cleaning block 24 is made of sponge. The cleaning blocks 24 are interference fit. The cleaning blocks 24 are used to clean oil and water stains from the welding rod 100. There are two sets of cleaning blocks 24 and transmission wheel rods 25. The two sets of cleaning blocks 24 and transmission wheel rods 25 are symmetrically arranged on both sides of the cleaning chamber 17. The transmission wheel rods 25 are used to move the welding rod 100 after the welding rod push rod 15 pushes the welding rod 100 into the cleaning chamber 17. The dryer 26 is a simple drying device composed of heating wire and fan. The dryer 26 is used to dry the welding rod 100 after the cleaning blocks 24 clean it.

[0039] The conveying device includes a mounting rod 27, a conveying rod 28, a guide wheel rod 29, and a ranging sensor 30. The mounting rod 27 is connected to the upper bracket 2 and is used to mount the conveying rod 28. The conveying rod 28 is rotatably connected to the mounting rod 27. The conveying rod 28, the outlet of the cleaning chamber 17, and the welding torch 8 are all located on the same plane. When the conveying rod 28 is parallel to the mounting rod 27, the welding rod 100 can just enter the conveying rod 28. The guide wheel rod 29 is located inside the conveying rod 28. The shape and material of the guide wheel rod 29 and the transmission wheel rod 25 are similar. All are the same except that the length is shorter than that of the transmission wheel rod 25. The guide wheel rod 29 is used to feed the welding rod 100 to the welding point. The distance sensor 30 is the same model as the distance meter 12. The distance sensor 30 is set inside the conveying rod 28. The distance sensor 30 is used to detect the length of the welding rod 100. When the welding rod 100 enters the conveying rod 28, the distance sensor 30 will block the infrared light emitted by the distance sensor 30. At this time, it will start recording. Since the rotation speed of the guide wheel rod 29 is constant, the length of the welding rod 100 can be recorded by recording the blocking time.

[0040] Working principle: During use, the scanning frame body 1 is attached to the weld point on the side wall of the ship using the magnetic block 6. The welding rod 100 is placed in the inner cavity of the storage box 13. Then, the moving wheel 7 is activated, and the scanning frame body 1 is moved along the weld point by the remote control. When the scanner 4 detects a weld crack at the weld point, the angle rotation wheel 10 will drive the grinder 11 to rotate to the lowest position. The distance fed back by the rangefinder 12 is used to control the lifting push rod 5 to move down until the scanner 4 can no longer detect the weld point within the specified range. After that, pressing the push rod 14 will push it once to move the pressing block 18 down. The moving rod will shift its angle as the pressing block 18 moves down, and the welding rod 100 will be discharged from the outlet. When electrode 23 falls onto pressing block 18, the return spring 21 will be stretched under force. After pressing push rod 14 resets, return spring 21 will rebound and drive the moving plate to reset. Then, electrode push rod 15 will push electrode 100 into cleaning chamber 17. Transmission wheel rod 25 in cleaning chamber 17 will clamp electrode 100 and move it along cleaning chamber 17. After being cleaned by cleaning block 24 and dried by dryer 26, it will enter conveyor rod 28 that is connected to cleaning chamber 17. Guide wheel rod 29 in conveyor rod 28 will adjust the length of electrode 100, and conveyor rod 28 will also adjust the angle of electrode 100. The two work together to make electrode 100 and welding gun 8 cooperate to re-weld the weld.

[0041] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A weld detection scan frame, characterized by, The utility model relates to a welding seam crack detection and repair device, including: a scanning frame body, the scanning frame body includes upper support and a plurality of support rods; a movement detection assembly, the movement detection assembly includes a scanner and a movement mechanism, the movement mechanism is used for moving the scanning frame body along the path scanned by the scanner; and a welding assembly, the welding assembly is arranged in the upper support, the welding assembly includes a removal mechanism, a feeding mechanism and a welding gun, the removal mechanism is used for removing the welding spot detected by the scanner to have the welding seam crack, the feeding mechanism is used for conveying the electrode when the welding gun welds the removed welding spot; The upper support and each support rod are provided with a lifting push rod, and the lifting push rod is used to adjust the distance between the upper support and the support rod. The removal mechanism includes an angle rotating wheel, a grinder and a range finder, the angle rotating wheel is rotatably connected to the upper support, the grinder is connected to the angle rotating wheel, and the range finder is arranged on the upper support. The welding gun is fixedly connected to the upper support, the feeding mechanism includes a storage box, a pressing push rod, an electrode push rod, a treatment device and a conveying device, the storage box is provided with a feeding cavity and a cleaning cavity, the pressing push rod and the electrode push rod are arranged in the feeding cavity, the pressing push rod is used to control the discharge of the storage box, the electrode push rod is used to push the electrode from the feeding cavity to the cleaning cavity, the treatment device is arranged in the cleaning cavity, the treatment device is used to clean the electrode, and the conveying device is used to send the cleaned electrode to the welding spot. The treatment device includes cleaning blocks, transmission wheel rods and a dryer, the cleaning blocks and transmission wheel rods are provided with two groups, and the two groups of cleaning blocks and transmission wheel rods are symmetrically arranged on both sides of the cleaning cavity, the transmission wheel rods are used to drive the electrode to move after the electrode push rod pushes the electrode to the cleaning cavity, and the dryer is used to dry the electrode after the cleaning blocks clean the electrode.

2. A weld detection carriage according to claim 1, wherein: The movement mechanism includes a magnetic block and a moving wheel, the magnetic block is arranged in the moving wheel, and the moving wheel is connected to the support rod.

3. A weld detection carriage according to claim 2, wherein: The support rod is provided with four moving wheels.

4. A weld detection carriage according to claim 1, wherein: The storage box includes a pressing block, a moving plate, a supporting block and a reset spring, the pressing block and the moving plate are fixedly connected, the supporting block is arranged at the bottom of the inner cavity of the storage box, the supporting block is used to provide a fulcrum for the angular rotation of the moving plate, and the reset spring is connected to the side, away from the pressing block, of the moving plate.

5. A weld detection carriage according to claim 4, wherein: The side, close to the pressing block, of the moving plate is provided with a baffle, the bottom of the baffle is provided with a discharge port, and the width of the discharge port is the same as the width of the electrode.

6. A weld detection carriage according to claim 1, wherein: The conveying device includes a mounting rod, a conveying rod, a guide wheel rod and a distance measuring sensor, the mounting rod is connected to the upper support, the conveying rod is connected to the mounting rod, the guide wheel rod is arranged in the conveying rod, the guide wheel rod is used to send the electrode to the welding spot, and the distance measuring sensor is arranged in the conveying rod.

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