On-line detection device and detection method for weld quality of ship curved-surface thick plate

Abstract

The invention belongs to the technical field of weld joint detection, particularly relates to an online detection device and method for the weld joint quality of a ship curved-surface thick plate, and provides the following scheme aiming at the problem that an existing detection device for the weld joint quality of the ship curved-surface thick plate is limited in use in a narrow space: the online detection device for the weld joint quality of the ship curved-surface thick plate comprises a power trolley, a control line is arranged on the control panel, a front guide table is arranged outside the power trolley, and two symmetrical rolling wheels are arranged at the bottom of the front guide table. According to the ship curved-surface thick plate welding seam quality online detection device and detection method, the device can effectively complete welding seam quality detection when the ship curved-surface thick plate welding seam is located in a narrow and limited position or a position where manpower cannot reach, through remote online control, the risk that workers are exposed in a special welding environment is reduced, and the working efficiency is improved. While the welding seam detection quality is ensured, the detection efficiency and effect are improved, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of weld inspection technology, and in particular to an online inspection device and method for the quality of welds on curved thick plates of ships. Background Technology

[0002] Weld inspection is a quality inspection and defect detection technology for welds. Its purpose is to identify defects such as cracks, porosity, slag inclusions, incomplete penetration, and lack of fusion that may exist in the weld, and to evaluate the mechanical properties, sealing performance, and durability of the weld, so as to ensure the safety and reliability of the welded structure during use. It is widely used in fields such as machinery manufacturing, petrochemicals, construction, and aerospace. There are various weld inspection methods, which are generally divided into two main categories: non-destructive testing and destructive testing.

[0003] Existing equipment for inspecting the quality of welds on curved thick plates in ships can only be used in open or large spaces, and requires on-site human intervention. It cannot be used effectively in narrow spaces inside ships or in locations inaccessible to humans, thus its use is extremely limited. Summary of the Invention

[0004] This invention discloses an online inspection device and method for the quality of welds on curved thick plates in ships, aiming to solve the technical problem that existing inspection devices for the quality of welds on curved thick plates in ships are limited in use in narrow spaces.

[0005] The present invention proposes an online inspection device for the quality of welds on curved thick plates of ships, comprising a power trolley, a control panel on which control lines are provided, a front platform on the outside of the power trolley, two symmetrical rollers at the bottom of the front platform, multiple equidistant connecting platforms between the power trolley and the front platform, and an adaptive expansion module on the outside of the connecting platforms, with an ultrasonic flaw detector mounted on top of one of the connecting platforms. The adaptive expansion module includes a steering platform, on which a camera and a searchlight are fixedly connected, and two symmetrical slots are formed on the outside of the steering platform, with laser ranging probes fixedly connected to the inner walls of each slot. The ultrasonic flaw detector is located between the two laser ranging probes, and movable slots are formed on the upper side of each connecting platform, with mounting blocks slidably connected within each movable slot.

[0006] In a preferred embodiment, the steering platform has four symmetrical fine holes, each containing a sliding rod slidably connected to it. Each sliding rod is surrounded by a second spring, one end of which is fixedly connected to the outside of the sliding rod on the same side, and the other end is fixedly connected to the outside of the steering platform. A contact wheel is provided at the end of each sliding rod furthest from the steering platform. A round rod is fixedly connected to the outside of the steering platform, and an extension plate is movably connected to the outside of the round rod. A rotary motor is fixedly connected to the outside of the extension plate, and the output end of the rotary motor is connected to one side of the round rod via a coupling. A rotating rod is movably connected to the upper side of the mounting block, and a first motor is fixedly connected to the upper side of the mounting block. The output of the first motor... The output end is connected to one side of the rotating rod via a coupling; a narrow groove is provided on the rotating rod, and a motor three is fixedly connected to the inner wall of the narrow groove. The output end of the motor three is connected to a threaded rod via a coupling. The side of the threaded rod away from the motor three is movably connected to the bottom inner wall of the narrow groove, and a transmission block is provided on the outside of the threaded rod. The transmission block is fixedly connected to the side opposite to the extension plate; two symmetrical limiting strips are fixedly connected to the upper side of each of the multiple connecting platforms. The inner walls of the limiting strips are slidably connected to the outside of the mounting block, and a rack is fixedly connected to the upper side of each connecting platform. A motor two is fixedly connected to the upper side of the mounting block, and a gear is connected to the output end of the motor two via a coupling. Engages with a rack; each of the multiple connecting platforms has a ball joint fixedly connected to its bottom, and each ball joint has a ball seat on its exterior. Each ball seat has an electromagnet fixedly connected to its bottom, and each electromagnet has a rubber pad fixedly connected to its bottom; each of the power trolley and the front guide platform has a sliding groove on their opposite sides, and each sliding groove has a movable platform slidably connected within it. Each of the power trolley and the front guide platform has a receiving frame fixedly connected to its upper side, and each receiving frame has a spring fixedly connected to its top inner wall. The end of each spring near the movable platform is fixedly connected to the upper side of the movable platform; each of the multiple connecting platforms has a connecting rod fixedly connected to its side near the power trolley and to the movable platform near the front guide platform. The movable platform and connecting platform are provided with slots on the side away from the power trolley. The inner walls of adjacent slots are inserted into the outer side of the connecting rod, and the outer side of the connecting rod is provided with a locking plate. Multiple locking plates are engaged with the outer side of the movable platform and connecting platform on the same side. The outer side of each locking plate is slidably connected to a constraint frame. The constraint frame is fixedly connected to the opposite side of the outer side of the connecting platform or movable platform on the same side. The inner wall of each constraint frame is fixedly connected to an elastic spring. The outer side of each elastic spring is fixedly connected to the outer side of the locking plate on the same side. The upper side of each constraint frame is provided with a reserved slot. A lever is slidably connected in the reserved slot. The lever is fixedly connected to the opposite side of the locking plate.

[0007] An online inspection method for the quality of welds on curved thick plates in ships, using the online inspection device for the quality of welds on curved thick plates in ships as described above, includes the following steps: Step 1: Before conducting quality inspection on the welds of curved thick plates on ships, determine whether the space of the weld is restricted and the length of the weld. Step 2: Based on the collected information, connect the power trolley, the front platform, and the multi-section connecting platform together, and move the device into the narrow space where the weld is located through the control panel and control lines; Step 3: Use the adaptive extension module and ultrasonic flaw detector to perform remote online welding quality inspection on the weld seam in the narrow space; Step 4: After the test is completed, the device will be retrieved and dismantled.

[0008] As can be seen from the above, the online inspection device for the quality of welds on curved thick plates of ships provided by the present invention can effectively complete the quality inspection of welds when the welds on curved thick plates of ships are in narrow and restricted locations or inaccessible to humans. Through remote online control, the risk of workers being exposed to special welding environments is reduced. While ensuring the quality of weld inspection, the efficiency and effect of inspection are improved, and safety is enhanced. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the online inspection device for the quality of weld seams on curved thick plates of ships proposed in this invention. Figure 2 This is a bottom view of the online inspection device for the quality of weld seams on curved thick plates of ships proposed in this invention. Figure 3 This is a schematic diagram of the power trolley structure of the online inspection device for the quality of weld seams on curved thick plates of ships proposed in this invention. Figure 4 This is a schematic diagram of the movable platform structure of the online inspection device for the quality of weld seams on curved thick plates of ships proposed in this invention. Figure 5 This is a schematic diagram of the mounting block structure of the online inspection device for weld quality of curved thick plates in ships proposed in this invention; Figure 6 This is a schematic diagram of the rotating rod structure of the online inspection device for the quality of weld seams on curved thick plates of ships proposed in this invention. Figure 7 This is a schematic diagram of the rotating table structure of the online inspection device for weld quality of curved thick plates in ships proposed in this invention.

[0010] In the diagram: 1. Power trolley; 2. Control panel; 3. Control line; 4. Connecting platform; 5. Front guide platform; 6. Roller; 7. Ultrasonic flaw detector; 8. Adaptive expansion module; 801. Movable platform; 802. Receiving frame; 803. Spring 1; 804. Slide; 805. Ball joint; 806. Ball seat; 807. Electromagnet; 808. Rubber pad; 809. Slot; 810. Connecting rod; 811. Constraint frame; 812. Locking plate; 813. Elastic spring; 814. Reserved slot; 815. 816. Lever; 817. Movable slot; 818. Mounting block; 819. Limiting strip; 820. Rotating rod; 821. Motor 1; 822. Motor 2; 823. Gear; 824. Rack; 825. Narrow slot; 826. Motor 3; 827. Threaded rod; 828. Transmission block; 829. Extension plate; 830. Turning platform; 831. Rotary motor; 832. Slide rod; 833. Spring 2; 834. Contact wheel; 835. Laser rangefinder; 836. Camera; 837. Searchlight. Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0012] The online inspection device for the quality of welds on curved thick plates of ships disclosed in this invention is mainly applied to scenarios where the use of existing inspection devices for the quality of welds on curved thick plates of ships is limited in narrow spaces.

[0013] Reference Figures 1-7 An online inspection device for the quality of welded seams on curved thick plates of ships includes a power trolley 1, a control panel 2 on the power trolley 1, control lines 3 on the control panel 2, and a front platform 5 on the outside of the power trolley 1. Two symmetrical rollers 6 are located at the bottom of the front platform 5. Multiple equidistant connecting platforms 4 are arranged between the power trolley 1 and the front platform 5, and the same adaptive expansion module 8 is located on the outside of each connecting platform 4. An ultrasonic flaw detector 7 is located above one of the connecting platforms 4. The adaptive expansion module 8 includes a steering platform 829, on which a camera 835 and a searchlight 836 are bolted. Two symmetrical slots are formed on the outside of the steering platform 829, and laser ranging probes 834 are bolted to the inner walls of each slot. The ultrasonic flaw detector 7 is located between the two laser ranging probes 834. Movable slots 816 are formed on the upper side of each connecting platform 4, and mounting blocks 817 are slidably connected within each movable slot 816.

[0014] Specifically, the device utilizes the adaptive expansion module 8 to effectively perform weld quality inspection when the weld seam of the curved thick plate on the ship is in a narrow and restricted location or inaccessible to human personnel. Through remote online control, it reduces the risk of workers being exposed to special welding environments, improves the efficiency and effectiveness of inspection while ensuring the quality of weld inspection, and enhances safety.

[0015] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In a preferred embodiment, the steering platform 829 has four symmetrical small holes, each containing a sliding rod 831. Each sliding rod 831 is surrounded by a spring 832. One end of each spring 832 is bolted to the outside of the sliding rod 831 on the same side, and the other end is bolted to the outside of the steering platform 829. A contact wheel 833 is provided at the end of each sliding rod 831 away from the steering platform 829. A round rod is bolted to the outside of the steering platform 829. An extension plate 828 is rotatably connected to the outside of the round rod via a bearing. A rotary motor 830 is bolted to the outside of the extension plate 828. The output end of the rotary motor 830 is connected to one side of the round rod via a coupling, and a mounting block is also present. A rotating rod 819 is rotatably connected to the upper side of mounting block 817 via bearings. A motor 820 is bolted to the upper side of mounting block 817. The output end of motor 820 is connected to one side of rotating rod 819 via a coupling. A narrow slot 824 is formed on rotating rod 819. A motor 825 is bolted to the inner wall of narrow slot 824. A threaded rod 826 is bolted to the output end of motor 825. The side of threaded rod 826 away from motor 825 is rotatably connected to the bottom inner wall of narrow slot 824 via bearings. A transmission block 827 is provided on the outside of threaded rod 826. The side of transmission block 827 opposite to extension plate 828 is bolted to it. Multiple connecting platforms 4 are each bolted to two pairs of... The limiting strips 818 are slidably connected to the outer side of the mounting block 817. The upper side of each connecting platform 4 is bolted with a rack 823. The upper side of the mounting block 817 is bolted with a motor 821. The output end of the motor 821 is connected to a gear 822 via a coupling. The gears 822 mesh with the rack 823. The bottom of each connecting platform 4 is bolted with a ball joint 805. Each ball joint 805 has a ball seat 806 on its outer side. The bottom of each ball seat 806 is bolted with an electromagnet 807, and the bottom of each electromagnet 807 is bolted with a rubber pad 808. A sliding groove 804 is provided on the opposite side of the power trolley 1 and the front guide platform 5. 04 is slidably connected to a movable platform 801. The upper sides of the power trolley 1 and the front guide platform 5 are both bolted to a receiving frame 802. The top inner wall of the receiving frame 802 is bolted to a spring 803. The end of the spring 803 near the movable platform 801 is bolted to the upper side of the movable platform 801. Multiple connecting platforms 4 are bolted to the side of the movable platform 801 near the power trolley 1 and the movable platform 801 near the front guide platform 5. The movable platform 801 near the power trolley 1 and the side of the connecting platform 4 away from the power trolley 1 are both provided with slots 809. The inner walls of adjacent slots 809 are inserted into the outside of the connecting rods 810. The outside of the connecting rods 810 is provided with locking plates 812.Multiple locking plates 812 are engaged with the exterior of the movable platform 801 and the connecting platform 4 on the same side. Each locking plate 812 is slidably connected to a constraint frame 811. The constraint frame 811 is bolted to the opposite side of the connecting platform 4 or the movable platform 801 on the same side. The inner wall of each constraint frame 811 is bolted to an elastic spring 813. The exterior of each elastic spring 813 is bolted to the exterior of the locking plate 812 on the same side. Each constraint frame 811 has a pre-drilled slot 814 on its upper side. A lever 815 is slidably connected within each pre-drilled slot 814. The lever 815 is bolted to the opposite side of the locking plate 812.

[0016] In specific application scenarios, the adaptive expansion module 8 is mainly applicable to the adaptive expansion stage in the adaptive expansion process. Specifically, the adaptive expansion module 8, using connecting rods 810 and slots 809, allows the device to automatically control the number of connecting platforms 4 that need to be connected based on the length of the weld and the degree of constraint of the inspection environment. This expandable module flexibly adapts to different inspection environments, saving storage space. Using the power trolley 1, connecting platforms 4, guide platform 5, rollers 6, and ultrasonic flaw detector 7, the device can easily reach dangerous or restricted environments inaccessible to humans. Through external online control, the difficulty and danger of inspection are reduced. Using ball joints 805, ball seats 806, electromagnets 807, and rubber pads 808, the device can be firmly fixed to the ship during weld inspection, reducing the risk of slippage due to the curved surfaces of the ship, which could affect inspection accuracy and effectiveness, thus improving the stability of the device.

[0017] It should be noted that the use of the rotating rod 819, extension plate 828, and turning table 829 enables the device to have good inspection capabilities for welds at different positions on the ship's curved panel, thereby effectively ensuring the adaptability of the device and improving its versatility. The use of the laser rangefinder probe 834 can detect the curvature of the curved panel, thereby effectively determining the surface normal of the weld location, so that the ultrasonic flaw detector 7 on the device can coincide with the normal, and the ultrasonic waves generated by the ultrasonic flaw detector 7 can completely penetrate the weld, thereby reducing the detection error of the ultrasonic flaw detector 7 and improving accuracy.

[0018] An online inspection method for the quality of welds on curved thick plates in ships, using the online inspection device for the quality of welds on curved thick plates in ships as described above, includes the following steps: Step 1: Before conducting quality inspection on the welds of curved thick plates on ships, determine whether the space of the weld is restricted and the length of the weld. Step 2: Based on the collected information, connect the power trolley 1, the front platform 5, and the multi-section connecting platform 4 together, and move the device into the narrow space where the weld is located through the control panel 2 and the control line 3; Step 3: Using the adaptive extension module 8 and ultrasonic flaw detector 7, perform remote online welding quality inspection on the weld seam in the narrow space. (After determining the weld seam length and the inspection environment, select a sufficient number of connecting platforms 4 to connect to each other, insert the connecting rod 810 into the slot 809, overcome the elastic force of the elastic spring 813 to move the lever 815, causing the locking plate 812 to retract into the constraint frame 811, so that the connecting rod 810 is fully inserted into the slot 809, release the lever 815, and the locking plate 812 is reset under the push of the elastic spring 813, thereby completing the engagement of the movable table 801 and the connecting platform 4, so that the connection is complete.) The connecting rod 810, connecting platform 4, power trolley 1, and guide platform 5 are connected together. Before connecting the last section of connecting platform 4 to the movable platform 801, the mounting block 817 needs to be inserted into the movable slot 816 along the inner wall of the limiting strip 818. The power trolley 1 is then moved into the narrow space where the weld is located via the control panel 2 connected to the control line 3. After moving to the designated position, the electromagnet 807 is activated. Due to magnetic attraction, the electromagnet 807 causes the connecting platform 4 to descend against the tension of spring 803, making the rubber pad 808 press tightly against the ship. Motors 820 and 825 are then activated, causing motor 820 to... The rotating rod 819 and extension plate 828 are rotated, causing the threaded rod 826 to rotate and the extension plate 828 to rise or fall on the rotating rod 819. This causes the steering platform 829 to gradually approach the weld position. The laser ranging probe 834 is activated, scanning the weld and its surrounding area to determine the normal line of the weld position based on the curvature of the curved panel. The rotating motor 830 is activated, driving the steering platform 829 to rotate so that the ultrasonic flaw detector 7 coincides with the normal line. Through continuous adjustments by motor 820, motor 825, and rotating motor 830, the steering platform 829... As the ultrasonic flaw detector 7 gradually approaches the weld and presses the contact wheel 833 onto the curved panel, under the pressure of the turntable 829, the slide rod 831 overcomes the elastic force of the second spring 832 and retracts, causing the ultrasonic flaw detector 7 to gradually approach the weld until it makes contact. The second motor 821 is then started, driving the gear 822 meshing with the rack 823 to rotate, causing the mounting block 817 to move at a constant speed in the movable groove 816. This allows the ultrasonic flaw detector 7 to begin inspecting the weld quality. During the movement of the ultrasonic flaw detector 7, the camera 835 and the searchlight 836 can be activated to monitor the movement of the ultrasonic flaw detector 7 and make timely adjustments. Step 4: After the test is completed, the device will be retrieved and dismantled.

[0019] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An online inspection device for the quality of welds on curved thick plates of ships, comprising a power trolley (1), characterized in that, The power trolley (1) is equipped with a control panel (2), and the control panel (2) is equipped with control lines (3). A front platform (5) is provided on the outside of the power trolley (1). Two symmetrical rollers (6) are provided at the bottom of the front platform (5). Multiple equidistant connecting platforms (4) are provided between the power trolley (1) and the front platform (5). The same adaptive expansion module (8) is provided on the outside of the connecting platform (4). An ultrasonic flaw detector (7) is provided on the top of one of the connecting platforms (4). The adaptive expansion module (8) includes a turntable (829), on which a camera (835) and a searchlight (836) are fixedly connected. Two symmetrical slots are opened on the outside of the turntable (829), and laser ranging probes (834) are fixedly connected to the inner walls of the slots. An ultrasonic flaw detector (7) is located between the two laser ranging probes (834), and movable slots (816) are opened on the upper side of the connecting platform (4). Mounting blocks (817) are slidably connected in the movable slots (816). The steering platform (829) has four symmetrical small holes, each of which is slidably connected to a slide rod (831). Each slide rod (831) is surrounded by a second spring (832). One end of each second spring (832) is fixedly connected to the outside of the slide rod (831) on the same side, and the other end is fixedly connected to the outside of the steering platform (829). A contact wheel (833) is provided at the end of the slide rod (831) away from the steering platform (829).

2. The online inspection device for the quality of welds on curved thick plates of ships according to claim 1, characterized in that, The turntable (829) is externally fixedly connected to a round rod, and an extension plate (828) is externally movably connected to the round rod. A rotary motor (830) is externally fixedly connected to the extension plate (828). The output end of the rotary motor (830) is connected to one side of the round rod through a coupling. A rotating rod (819) is movably connected to the upper side of the mounting block (817). A motor (820) is fixedly connected to the upper side of the mounting block (817). The output end of the motor (820) is connected to one side of the rotating rod (819) through a coupling.

3. The online inspection device for the quality of welds on curved thick plates of ships according to claim 2, characterized in that, The rotating rod (819) has a narrow groove (824). The inner wall of the narrow groove (824) is fixedly connected to a motor (825). The output end of the motor (825) is connected to a threaded rod (826) through a coupling. The side of the threaded rod (826) away from the motor (825) is movably connected to the bottom inner wall of the narrow groove (824). A transmission block (827) is provided on the outside of the threaded rod (826). The transmission block (827) is fixedly connected to the side opposite to the extension plate (828).

4. The online inspection device for the quality of welds on curved thick plates of ships according to claim 3, characterized in that, Two symmetrical limiting strips (818) are fixedly connected to the upper side of each of the multiple connecting platforms (4). The inner walls of the limiting strips (818) are slidably connected to the outer side of the mounting block (817). A rack (823) is fixedly connected to the upper side of each connecting platform (4). A second motor (821) is fixedly connected to the upper side of the mounting block (817). The output end of the second motor (821) is connected to a gear (822) through a coupling. The gear (822) meshes with the rack (823).

5. The online inspection device for the quality of welds on curved thick plates of ships according to claim 4, characterized in that, Each of the multiple connecting platforms (4) is fixedly connected to a ball head rod (805) at its bottom. Each ball head rod (805) is provided with a ball seat (806) on its outside. Each ball seat (806) is fixedly connected to an electromagnet (807) at its bottom, and each electromagnet (807) is fixedly connected to a rubber pad (808) at its bottom.

6. The online inspection device for the quality of welds on curved thick plates of ships according to claim 5, characterized in that, The power trolley (1) and the front guide platform (5) are provided with a sliding groove (804) on opposite sides. A movable platform (801) is slidably connected in the sliding groove (804). A receiving frame (802) is fixedly connected to the upper side of the power trolley (1) and the front guide platform (5). A spring (803) is fixedly connected to the top inner wall of the receiving frame (802), and the end of the spring (803) near the movable platform (801) is fixedly connected to the upper side of the movable platform (801).

7. The online inspection device for the quality of welds on curved thick plates of ships according to claim 6, characterized in that, Connecting rods (810) are fixedly connected to the side of the multiple connecting platforms (4) near the power trolley (1) and the movable platform (801) near the front platform (5). The movable platform (801) near the power trolley (1) and the side of the connecting platform (4) away from the power trolley (1) are provided with slots (809). The inner walls of adjacent slots (809) are inserted into the outside of the connecting rods (810), and the outside of the connecting rods (810) is provided with locking plates (812).

8. The online inspection device for the quality of welds on curved thick plates of ships according to claim 7, characterized in that, Multiple locking plates (812) are snapped together with the exterior of the movable platform (801) and the connecting platform (4) on the same side. Each locking plate (812) is slidably connected to a constraint frame (811). The constraint frame (811) is fixedly connected to the opposite side of the exterior of the connecting platform (4) or the movable platform (801) on the same side. Each constraint frame (811) is fixedly connected to an elastic spring (813) on its inner wall. The exterior of the elastic spring (813) is fixedly connected to the exterior of the locking plate (812) on the same side. Each constraint frame (811) has a reserved slot (814) on its upper side. Each reserved slot (814) is slidably connected to a lever (815). The lever (815) is fixedly connected to the opposite side of the locking plate (812).

9. An online inspection method for the quality of welds on curved thick plates in ships, using the online inspection device for the quality of welds on curved thick plates in ships as described in claim 8, characterized in that... Includes the following steps: Step 1: Before conducting quality inspection on the welds of curved thick plates on ships, determine whether the space of the weld is restricted and the length of the weld. Step 2: Based on the collected information, connect the power trolley (1), the front platform (5) and the multi-section connecting platform (4) together, and move the device into the narrow space where the weld is located through the control panel (2) and the control line (3); Step 3: Use the adaptive extension module (8) and ultrasonic flaw detector (7) to perform remote online welding quality inspection on the weld seam in the narrow space; Step 4: After the test is completed, the device will be retrieved and dismantled.

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