Laser additive manufacturing equipment for maritime work equipment

Abstract

The invention relates to the technical field of laser welding auxiliary equipment, in particular to maritime work equipment laser additive manufacturing equipment which is suitable for crack laser welding of seabed oil pipelines and comprises a sealing shell, a laser welding assembly, a side plate, a driving assembly, a moving assembly, a shoveling assembly, a positioning assembly and an elastic switch. In the moving process of attaching to the seabed oil pipeline, the distance between the bottom of the device and the oil pipeline is flexibly adjusted, attachments at the laser repair welding position of the seabed oil pipeline are shoveled step by step, and the contact range with the seabed oil pipeline can be enlarged when the device stops moving for laser welding, so that the problem that the seabed oil pipeline is damaged due to the attachments on the periphery of the seabed oil pipeline is solved. The problems that a laser welding head cannot directly and accurately act on a crack part, laser additive welding equipment is uneven when making contact with an oil pipeline due to the influence of attachments, and repairing deviation is generated due to shaking during laser repairing welding are solved.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for laser welding, specifically a laser additive manufacturing equipment for marine engineering equipment. Background Technology

[0002] Subsea oil pipelines in marine engineering equipment are the arteries connecting offshore oil and gas production with the land. Oil pipelines located in near-shore areas are prone to fatigue cracks due to multiple factors, requiring regular inspection and laser welding treatment of cracked areas using laser additive welding equipment equipped with an intelligent welding system.

[0003] When using laser additive welding equipment to laser weld cracks in oil pipelines, the presence of marine organisms on the pipeline's outer circumference makes it difficult to precisely repair the cracks with the laser welding head. Furthermore, the uneven surface between the laser additive welding equipment and the pipeline can cause deviations between the laser-welded area and the actual repair area, resulting in poor final repair outcomes for the oil pipeline.

[0004] To address this, a laser additive manufacturing equipment for marine engineering equipment is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a laser additive manufacturing device for marine engineering equipment. During the movement of the device close to a subsea oil pipeline, it flexibly adjusts the distance between its bottom and the pipeline to remove adhering materials at the laser repair welding point of the subsea oil pipeline in stages. When the device stops moving to perform laser welding, it increases the contact area with the subsea oil pipeline. This solves the problems caused by adhering materials on the outer periphery of the subsea oil pipeline, which prevent the laser welding head from directly and accurately targeting the crack. It also addresses the uneven contact between the laser additive welding device and the pipeline caused by adhering materials, leading to repair deviations due to shaking during laser repair welding. The device effectively removes adhering materials from the outer periphery of the oil pipeline, ensures accurate laser welding repair of cracks, and improves welding stability, further enhancing the repair accuracy and effect of the oil pipeline.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A laser additive manufacturing device for marine engineering equipment, suitable for laser welding of cracks in subsea oil pipelines, includes a sealed shell, a laser welding assembly, a side plate, a drive assembly, a moving assembly, a scraping assembly, a positioning assembly, and a spring switch. The side plate is sealed and installed at the front end of the sealed shell, and its side wall has two parallel vertical grooves and a connecting groove between the vertical grooves. The spring switch is embedded in the side wall of the side plate. The drive assembly is connected to both the moving assembly and the scraping assembly. The drive assembly is connected to the positioning assembly through the spring switch. When the drive assembly is activated, it drives the moving assembly and the scraping assembly to move in the same direction at different speeds. When the moving assembly and the scraping assembly form different height differences, the drive assembly drives the scraping assembly to remove the attached material step by step. As the drive assembly moves, it pushes seawater to flush the scraped-off material to both sides of the sealing shell in the direction of movement. When the moving assembly moves to its highest point, it squeezes the spring switch. When the spring switch is pressed, it controls the positioning assembly to be energized at regular intervals. The positioning assembly then unfolds to fit the subsea oil pipeline.

[0007] Preferably, the laser welding assembly includes a top plate, an observation window, a filling cap, an additive material storage box, and a laser welding gun. The top plate is mounted on a sealed outer shell, and two observation windows are symmetrically arranged on the top plate. The additive material storage box is installed at the center of the bottom of the top plate, the filling cap is screwed onto the top plate, and the laser welding gun is mounted at the bottom of the additive material storage box via a universal moving frame.

[0008] Preferably, the drive assembly includes a flow-breaking plate, a power supply, a servo motor, and inclined slots. The flow-breaking plate is fitted onto the front side of the side plate. The power supply and the servo motor are both installed inside the flow-breaking plate. The power supply is connected to a circuit board and a PLC with a timer. Multiple inclined slots are symmetrically arranged about the center line of the flow-breaking plate on the front side of the flow-breaking plate.

[0009] Preferably, the top of the flow-breaking plate is flush with the top of the side plate, and the flow-breaking plate is composed of three inclined surfaces arranged from top to bottom, with the inclined groove located at the bottommost inclined surface.

[0010] Preferably, the multiple inclined grooves located on the same side of the central axis of the flow-breaking plate are not parallel to each other, and the acute angle between the inclined grooves near the edge of the flow-breaking plate and the vertical direction gradually decreases.

[0011] Preferably, the moving component includes a drive wheel, mounting blocks, a connecting rod, and a first screw. The connecting rod is slidably disposed in a communicating groove, and the first screw is disposed in the communicating groove and threadedly connected to the center of the connecting rod. The top end of the first screw is drivenly connected to the output shaft of a servo motor. Two mounting blocks are respectively mounted on both ends of the connecting rod and are slidably disposed in a vertical groove. The drive wheel is mounted on the bottom of the mounting blocks, and the outer periphery of the drive wheel is configured as a conical surface adapted to the outer periphery of the subsea oil pipeline.

[0012] Preferably, the scraping assembly includes a scraper, a mounting bracket, a slider, and a second screw. The side wall of the side plate has a groove, the slider is slidably disposed in the groove, the second screw is rotatably disposed in the second groove, and the second screw is threadedly connected to the slider. The top of the second screw is drivenly connected to the output shaft of a servo motor. The mounting bracket is mounted on the side wall of the slider, and the scraper is mounted on the bottom of the mounting bracket.

[0013] Preferably, the positioning component includes a waterproof motor, a gear, an arc-shaped strip, and a toothed groove. The waterproof motor is installed inside the side plate, the gear is installed on the output shaft of the waterproof motor, the end of the arc-shaped strip is constructed in the shape of an isosceles trapezoid, and the upper width of the arc-shaped strip is greater than its lower width. The arc-shaped strip is slidably connected to the side plate for limiting, and the toothed groove is constructed at the top of the arc-shaped strip and is adapted to the gear.

[0014] Preferably, the thread pitches of the first screw and the second screw are different, and the thread pitch of the first screw is greater than that of the second screw.

[0015] Preferably, the length of the blade in the horizontal direction is less than the minimum distance between the two drive wheels, and the bottom of the blade is set to be an arc shape that adapts to the outer periphery of the subsea oil pipeline.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In use, during the movement of the subsea oil pipeline, the moving component and the scraping component can be adjusted to their respective positions by controlling the drive component. The moving component and the scraping component can form a gap of the same or different size with the outer periphery of the subsea oil pipeline. As the moving component moves the sealing shell, the scraping component can remove the attached materials on the outer periphery of the subsea oil pipeline in stages, thereby ensuring that the outer periphery of the subsea oil pipeline is smooth. This is beneficial for subsequent laser additive welding, allowing the laser welding head to accurately target the crack, greatly improving the repair accuracy of laser additive welding. After the positioning component is deployed, the stability during welding can be greatly improved, effectively ensuring the subsequent laser additive welding effect.

[0017] 2. Both the moving component and the scraping component are powered by the same drive component. However, due to the different thread pitches of the first and second screws, they produce different displacements. By utilizing the different displacements, the distance between the scraping component and the outer circumference of the subsea oil pipeline can be flexibly adjusted. Thus, when the moving component drives the entire laser additive manufacturing equipment to move along the subsea oil pipeline, the distance between the scraping component and the outer circumference of the subsea oil pipeline can be changed multiple times to remove the deposits on the outer circumference of the subsea oil pipeline in stages. This ensures a smooth outer circumference of the subsea oil pipeline, allowing the laser welding head to precisely target the cracks, thereby fully ensuring the repair effect of laser additive welding.

[0018] 3. Through the set spring switch and positioning component, when the welding operation is performed, the drive component moves the moving component to a high position, causing the moving component to separate from the outer periphery of the subsea oil pipeline. At this time, the sealing shell and the bottom of the side plate are sealed and fitted with the outer periphery of the subsea oil pipeline. When the spring switch is squeezed by the mounting block that has moved to the highest position, the power supply of the positioning component is turned on at regular intervals, and the waterproof motor is controlled to rotate in a suitable direction until the arc strip slides against the bottom of the side plate. This allows the sealing shell to increase the contact range with the subsea oil pipeline through the arc strip and form an effective limiting effect, thereby effectively ensuring the stability of the sealing shell and the overall equipment during welding, avoiding deviations at the welding position, and thus ensuring the repair effect of the pipeline. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention in its working state; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the laser welding assembly of the present invention; Figure 4 This is a schematic diagram of the side plate of the present invention; Figure 5 This is a schematic cross-sectional view of the drive component of the present invention; Figure 6 This is a schematic diagram of the structure of the moving component of the present invention; Figure 7 This is a schematic diagram of the structure of the removal component of the present invention; Figure 8 This is a schematic diagram of the positioning component of the present invention.

[0020] In the diagram: 1. Subsea oil pipeline; 2. Sealed outer shell; 3. Laser welding assembly; 31. Top plate; 32. Observation window; 33. Filling cap; 34. Additive material storage box; 35. Laser welding gun; 4. Side plate; 41. Vertical groove; 42. Connecting groove; 5. Drive assembly; 51. Flow-breaking plate; 52. Power supply; 53. Servo motor; 54. Inclined groove; 6. Moving assembly; 61. Power wheel; 62. Mounting block; 63. Connecting rod; 64. First screw; 7. Removal assembly; 71. Shovel; 72. Mounting bracket; 73. Slider; 74. Second screw; 8. Positioning assembly; 81. Waterproof motor; 82. Gear; 83. Arc strip; 84. Gear groove; 9. Spring switch. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 8 This invention provides a laser additive manufacturing equipment for marine engineering equipment, the technical solution of which is as follows: This technical solution is designed for subsea oil pipelines located in nearshore areas. Considering the actual conditions in nearshore areas, ocean currents flowing through the pipeline will generate periodic vortices, causing the pipeline to vibrate. This long-term, high-frequency vibration will generate fatigue microcracks at stress concentration points (such as welds and defects) and gradually expand. In addition, considering the scouring of sediment, sediment activity in nearshore areas is much more frequent than in the deep sea. After the seabed sediment is washed away, some parts of the pipeline are left suspended. The suspended sections are more prone to vibration under the action of waves and ocean currents, generating fatigue stress, which in turn leads to a higher frequency of cracks in nearshore oil pipelines. Therefore, the following design scheme improves the crack repair effect of nearshore oil pipelines.

[0023] Reference Figure 1 and Figure 2A laser additive manufacturing device for marine engineering equipment, suitable for laser welding of cracks in a subsea oil pipeline 1, includes a sealing shell 2 and a laser welding assembly 3. The sealing shell 2 is generally rectangular and made of high-strength alloy material, capable of withstanding seawater pressure at deep sea depths. Its bottom is adapted to the outer periphery of the subsea oil pipeline 1. The laser welding assembly 3 is installed inside the sealing shell 2, and its overall structure extends to the inner side of the sealing shell 2. After the laser welding assembly 3 forms a closed space between the sealing shell 2, the side plate 4, and the outer periphery of the subsea oil pipeline 1, the laser welding assembly 3 utilizes a set intelligent control system and visual recognition system. A high-pressure gas tank is installed on the top surface of the inner side of the sealing shell 2, and the side wall is provided with a gas port with a one-way valve. The gas outlet of the high-pressure gas tank is controlled by a solenoid valve. After the solenoid valve is turned on, the inert gas in the high-pressure gas tank is discharged, and the water in the sealed housing 2 is squeezed to the outside of the sealed housing 2 through the air hole. After the inert gas is introduced into the sealed housing 2, the laser additive welding operation can be automatically performed. It also includes a side plate 4, a drive assembly 5, a moving assembly 6, a scraping assembly 7, a positioning assembly 8, and a spring switch 9. The side plate 4 is sealed and installed at the front end of the sealed housing 2. The bottom of the side plate 4 is flush with the bottom of the sealed housing 2, and the bottom of the side plate 4 is adapted to the outer periphery of the subsea oil pipeline 1. The side wall of the side plate 4 has two parallel vertical grooves 41 and a connecting groove 42 connecting the vertical grooves 41. The side view section of the connecting groove 42 is an inverted L shape, so that the top of the connecting groove 42 extends to be flush with the side wall of the side plate 4, so as to connect the connecting rod 6. 3. Placed into the connecting groove 42, the two vertical grooves 41 are symmetrically arranged about the vertical axis of the side plate 4. The drive component 5 is fitted and installed on the front side of the side plate 4. The moving component 6 is slidably arranged between the vertical grooves 41 and the connecting groove 42. Under the action of the vertical grooves 41 and the connecting groove 42, the moving component 6 can only move in the vertical direction. The scraping component 7 is slidably installed on the front side of the side plate 4. The side wall of the side plate 4 has a groove for the scraping component 7 to move. The scraping component 7 is more biased towards the outside of the side plate 4 than the moving component 6. The positioning component 8 is limited and installed at the bottom of the side plate 4. When the positioning component 8 is fully retracted into the side plate 4, its bottom is flush with the bottom of the side plate 4. When the positioning component 8 moves, the sealing shell 2 can increase the contact range with the subsea oil pipeline 1 through the positioning component 8, and when When the positioning component 8 moves to its maximum displacement, the bottom of its mating side plate 4 can form a limit with the subsea oil pipeline 1, thereby improving the overall stability between the laser welding component 3 and the sealing shell 2 during operation, thus ensuring the accuracy of the welded part and avoiding repair deviations. The spring switch 9 is embedded in the side wall of the side plate 4, and the elastic button of the spring switch 9 extends into the vertical groove 41. When the mounting block 62 moves up to the highest point in the vertical groove 41, the mounting block 62 pushes the elastic button up, thereby connecting the power supply 52 of the corresponding component through the spring switch 9. The drive component 5 is connected to the moving component 6 and the removal component 7 respectively. The drive component 5 is connected to the positioning component 8 through the spring switch 9. When the drive component 5 is started, it drives the moving component 6 and the removal component 7 to move in the same direction at different speeds.When the moving component 6 and the removal component 7 form different height differences, the driving component 5 drives the removal component 7 to remove the attached material in stages. As the driving component 5 moves, it pushes seawater to flush the removed material to both sides of the sealing shell 2 in the direction of travel. When the moving component 6 reaches its highest point, it presses the spring switch 9. When the spring switch 9 is pressed, it periodically controls the positioning component 8 to be energized, causing the positioning component 8 to unfold and conform to the subsea oil pipeline 1.

[0024] Reference Figure 3 As one embodiment of the present invention, specifically, the laser welding assembly 3 includes a top plate 31, an observation window 32, a filling cap 33, an additive material storage box 34, and a laser welding gun 35. The top plate 31 is mounted on the sealed outer shell 2, and two observation windows 32 are symmetrically arranged on the top plate 31. The additive material storage box 34 is mounted at the bottom center of the top plate 31, and the filling cap 33 is screwed onto the top plate 31. The circular hole covered by the filling cap 33 is the material filling port of the additive material storage box 34. The laser welding gun 35 is mounted on the bottom of the additive material storage box 34 through a universal moving frame, and the additive material inlet of the laser welding gun 35 is connected to the interior of the additive material storage box 34.

[0025] Reference Figure 4 and Figure 5 In one embodiment of the present invention, the drive assembly 5 specifically includes a flow-breaking plate 51, a power supply 52, a servo motor 53, and a sloping groove 54. The flow-breaking plate 51 is fitted onto the front side of the side plate 4, with both sides of the flow-breaking plate 51 flush with the sides of the side plate 4. The power supply 52 and the servo motor 53 are both installed inside the flow-breaking plate 51. The power supply 52 is connected to a circuit board and a PLC with a timer. The PLC can control the driving direction of the drive assembly 5 through the circuit board. The driving time of the drive assembly 5 is adjusted according to the adjustment height of the moving assembly 6 and the shoveling assembly 7. The PLC adjusts the timing duration of the timer accordingly, thereby precisely controlling the flow direction. The driving time of the drive component 5 is controlled, thereby changing the vertical movement direction of the moving component 6 and the shovel component 7. This enables the moving component 6 and the shovel component 7 to move down and rise synchronously. The multiple inclined troughs 54 are symmetrically arranged about the center line of the flow-breaking plate 51 in front of the flow-breaking plate 51. Under the action of the inclined troughs 54, the flow-breaking plate 51 will break the seawater when it moves forward. The function of the inclined troughs 54 is to guide a part of the seawater to flow towards the shovel component 7. This allows the seawater to quickly flush the deposits produced by the shovel component 7 to both sides of the shovel component 7, thereby further ensuring the smoothness of the subsea oil pipeline 1 after cleaning.

[0026] Reference Figure 4In one embodiment of the present invention, the top of the flow-breaking plate 51 is flush with the top of the side plate 4, and the flow-breaking plate 51 is composed of three inclined surfaces from top to bottom. The inclined groove 54 is located at the bottommost inclined surface. The three inclined surfaces of the flow-breaking plate 51 are divided into three inclined surfaces a, b, and c from top to bottom. The topmost inclined surface a guides the seawater to flow upwards towards the sealing shell 2. The upward flowing seawater will generate downward pressure on the surface of the sealing shell 2, so that the moving component 6 can keep the moving component 6 in close rolling contact with the subsea oil pipeline 1 during the movement of the sealing shell 2. The middle inclined surface b guides the seawater to both sides of the sealing shell 2, so that the sealing shell 2 remains stable during the movement. The bottommost inclined surface c guides the seawater to flow outwards towards the outside of the subsea oil pipeline 1, thereby reducing the forward resistance of the sealing shell 2 and using the seawater to pre-wash the deposits in the forward direction.

[0027] Reference Figure 5 As one embodiment of the present invention, specifically, multiple inclined grooves 54 located on the same side of the central axis of the flow-breaking plate 51 are not parallel to each other, and the acute angle between the inclined grooves 54 near the edge of the flow-breaking plate 51 and the vertical direction gradually decreases. The inclined grooves 54 work together with the inclined surface c to flow the seawater to the outer periphery of the subsea oil pipeline 1 in front of the sealing shell 2. Under the action of the inclined grooves 54, the seawater flows to the outer periphery of the subsea oil pipeline 1 at different angles, thereby causing the seawater to flow obliquely towards the attachments scraped off by the scraping component 7, thereby quickly guiding the attachments to both sides of the scraper 71, ensuring that there are no attachments remaining on the covered part of the sealing shell 2.

[0028] Reference Figure 6 As one embodiment of the present invention, specifically, the moving component 6 includes a power wheel 61, a mounting block 62, a connecting rod 63, and a first screw 64. The connecting rod 63 is slidably disposed in the communicating groove 42, and the first screw 64 is disposed in the communicating groove 42 and threadedly connected to the center of the connecting rod 63. The top end of the first screw 64 is drively connected to the output shaft of the servo motor 53. Two mounting blocks 62 are respectively mounted at both ends of the connecting rod 63 and are slidably disposed in the vertical groove 41. The power wheel 61 is mounted at the bottom of the mounting block 62. The outer periphery of the power wheel 61 is set as a conical surface adapted to the outer periphery of the subsea oil pipeline 1. Under the design of the conical surface of the outer periphery of the power wheel 61, the outer periphery of the power wheel 61 can fully fit with the curved outer periphery of the subsea oil pipeline 1, thereby ensuring the stability of the sealing shell 2 when moving along the subsea oil pipeline 1.

[0029] Reference Figure 7In one embodiment of the present invention, the scraping assembly 7 specifically includes a scraper 71, a mounting bracket 72, a slider 73, and a second screw 74. The front side of the side plate 4 has notches corresponding to the tops of the first screw 64 and the second screw 74, respectively. The two notches have different heights. The output shaft of the servo motor 53 is connected to the first screw 64 and the second screw 74 via these notches. A double gear disk of equal diameter is fitted onto the end of the servo motor 53. A single gear disk of equal diameter is fitted onto the end of the first screw 64 and the end of the second screw 74. Both single gear disks are connected to the double gear disk via chains. A sliding groove is provided on the side wall of the side plate 4. The chute is located on the vertical central axis of the side wall of the side plate 4. The slider 73 is slidably disposed in the chute. The second screw 74 is rotatably disposed in the second chute and is threadedly connected to the slider 73. The top of the second screw 74 is drivenly connected to the output shaft of the servo motor 53. The mounting bracket 72 is mounted on the side wall of the slider 73. The scraper 71 is mounted on the bottom of the mounting bracket 72. When the bottom of the scraper 71 moves down to below the bottom of the side plate 4, the bottom of the power wheel 61 is in contact with the outer periphery of the subsea oil pipeline 1. Then, as the power wheel 61 starts, the scraper 71 will remove the attachments above the bottom of the scraper 71, thereby ensuring the smoothness of the repaired part of the outer periphery of the subsea oil pipeline 1.

[0030] Reference Figure 8 In one embodiment of the present invention, the positioning component 8 specifically includes a waterproof motor 81, a gear 82, an arc-shaped strip 83, and a toothed groove 84. The waterproof motor 81 is installed inside the side plate 4, and the gear 82 is installed on the output shaft of the waterproof motor 81. The end of the arc-shaped strip 83 is constructed in the shape of an isosceles trapezoid, and the upper width of the arc-shaped strip 83 is greater than its lower width. Under the design of the end section of the arc-shaped strip 83, the side plate 4 can achieve a better limiting effect on the arc-shaped strip 83. The arc-shaped strip 83 and the side plate 4 are connected in a limiting sliding connection. The toothed groove 84 is constructed on the top of the arc-shaped strip 83 and is adapted to the gear 82. There are two waterproof motors 81, and their rotation directions are opposite when they are simultaneously powered on by the power supply 52, so as to control the two arc-shaped strips 83 to move in opposite directions. When the output shaft of the waterproof motor 81 drives the gear 82 to rotate, under the cooperation of the toothed groove 84 and the gear 82, the arc-shaped strip 83 is moved in a limiting position against the bottom of the side plate 4.

[0031] Reference Figure 6 and Figure 7 In one embodiment of the present invention, specifically, the thread pitches of the first screw 64 and the second screw 74 are different, and the thread pitch of the first screw 64 is greater than the thread pitch of the second screw 74. Figure 4As can be seen, the initial height of the drive wheel 61 is higher than the height of the blade 71. Under the design of the thread pitch of the first screw 64 and the second screw 74, since the power source speed is the same and the transmission ratio of the servo motor 53 to the first screw 64 and the second screw 74 is the same, the first screw 64 and the second screw 74 move down at the same speed with the same thread pitch ratio. When the bottom of the drive wheel 61 is flush with the bottom of the blade 71, it means that the attachments on the subsea oil pipeline 1 can be completely removed. If the rotation of the first screw 64 and the second screw 74 is continued, the bottom of the drive wheel 61 will gradually be lower than the bottom of the blade 71, and the bottom distance will gradually increase. This operation can be used to adjust the distance between the blade 71 and the drive wheel 61 so as to fully remove the attachments on the outer periphery of the subsea oil pipeline 1 through multiple removal operations.

[0032] Reference Figure 4 As one embodiment of the present invention, specifically, the length of the blade 71 in the horizontal direction is less than the minimum distance between the two power wheels 61, and the bottom of the blade 71 is set to be an arc shape that adapts to the outer periphery of the subsea oil pipeline 1. When the blade 71 contacts the outer periphery of the subsea oil pipeline 1, it can fully remove the attached substances on the outer periphery of the subsea oil pipeline 1.

[0033] Working principle: The sealed outer shell 2 is controlled to sink onto the subsea oil pipeline 1. Then, the power supply 52 of the drive component 5 is turned on in the forward direction, causing the servo motor 53 to rotate clockwise. The servo motor 53 simultaneously drives the first screw 64 and the second screw 74 to rotate clockwise, thereby causing the moving component 6 and the scraping component 7 to move down to the corresponding height. Then, the servo motor 53 is de-energized, and the power supply 52 supplies power to the drive wheel 61 in the moving component 6. The drive wheel 61 rotates, thereby driving the sealed outer shell 2, the side plate 4 and the scraper 71 to move together to fit the outer periphery of the subsea oil pipeline 1. During the movement of the scraper 71, the attachments above the bottom of the scraper 71 are scraped off. At the same time, under the action of the flow-breaking plate 51, as the flow-breaking plate 51 moves with the side plate 4, it guides some seawater to flow to the outer periphery of the subsea oil pipeline 1, and flushes the attachments scraped off by the scraper 71 to both sides of the sealed outer shell 2. By repeatedly adjusting the relative height of the scraper 71 and the drive wheel 61, the attachments on the outer periphery of the subsea oil pipeline 1 are gradually removed. Specifically, when the servo motor 53 rotates clockwise, the first screw 64 and the second screw 74 rotate clockwise at the same speed. The connecting rod 63 and the slider 73, which are respectively threaded to them, move down to a suitable height at different speeds along the vertical groove 41 and the sliding groove. During the movement, the bottom of the power wheel 61 is lower than the bottom of the sealing shell 2, so that there is a certain distance between the bottom of the sealing shell 2 and the subsea oil pipeline 1, so as to avoid the attachments from cutting the sealing strip at the bottom of the sealing shell 2. After the attachments are removed, the power supply 52 of the drive component 5 is reversed. The servo motor 53 simultaneously drives the first screw 64 and the second screw 74 to rotate counterclockwise, thereby controlling the moving component 6 and the scraping component 7 to gradually move to the highest position. When the top of the mounting block 62 presses against the spring switch 9, the spring switch 9 connects the circuit between the power supply 52 and the waterproof motor 81. The power supply 52 supplies power to the waterproof motor 81 at regular intervals and controls the rotation direction of the waterproof motor 81 through the circuit board. This causes the output shaft of the waterproof motor 81 to extend the arc strip 83 from inside the side plate 4 and attach it to the outer periphery of the subsea oil pipeline 1 through the cooperation of the gear 82 and the tooth groove 84. The arc strip 83, together with the sealing shell 2 and the side plate 4, plays a limiting role with the subsea oil pipeline 1. After the inert gas is released inside the sealing shell 2 and the seawater inside is squeezed out, the laser welding gun 35 can then perform precise laser additive welding on the crack.

[0034] 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 laser additive manufacturing equipment for marine engineering equipment, suitable for laser welding of cracks in subsea oil pipelines, comprising a sealing shell and a laser welding assembly, wherein the laser welding assembly is installed inside the sealing shell, characterized in that: It also includes a side plate, a drive assembly, a moving assembly, a shovel assembly, a positioning assembly, and a spring switch. The side plate is sealed and installed at the front end of the sealed shell, and the side wall of the side plate has two parallel vertical grooves and a connecting groove between the vertical grooves. The spring switch is embedded in the side wall of the side plate. The drive assembly is connected to the moving assembly and the shovel assembly respectively. The drive assembly is connected to the positioning assembly through the spring switch. When the drive assembly is activated, it drives the moving assembly and the shovel assembly to move in the same direction at different speeds. When the moving assembly and the shovel assembly form different height differences, the drive assembly drives the shovel assembly to remove the attached material step by step. When the drive assembly moves, it pushes seawater to flush the shoveled attached material to both sides of the sealing shell in the direction of movement. When the moving assembly moves to the highest point, it squeezes the spring switch. When the spring switch is pressed, it controls the positioning assembly to be energized at regular intervals. The positioning assembly is deployed to fit the subsea oil pipeline.

2. The marine engineering equipment laser additive manufacturing equipment according to claim 1, characterized in that: The laser welding assembly includes a top plate, an observation window, a filling cap, an additive material storage box, and a laser welding gun. The top plate is mounted on a sealed outer shell, and two observation windows are symmetrically arranged on the top plate. The additive material storage box is installed at the center of the bottom of the top plate, the filling cap is screwed onto the top plate, and the laser welding gun is installed at the bottom of the additive material storage box via a universal movable frame.

3. The marine engineering equipment laser additive manufacturing equipment according to claim 2, characterized in that: The drive assembly includes a flow-breaking plate, a power supply, a servo motor, and inclined slots. The flow-breaking plate is fitted onto the front side of the side plate. The power supply and the servo motor are both installed inside the flow-breaking plate. The power supply is connected to a circuit board and a PLC with a timer. Multiple inclined slots are symmetrically arranged about the center line of the flow-breaking plate on the front side of the flow-breaking plate.

4. The marine engineering equipment laser additive manufacturing equipment according to claim 3, characterized in that: The top of the flow-breaking plate is flush with the top of the side plate, and the flow-breaking plate is composed of three inclined surfaces arranged from top to bottom, with the inclined groove located at the bottommost inclined surface.

5. The marine engineering equipment laser additive manufacturing equipment according to claim 4, characterized in that: The multiple inclined grooves located on the same side of the central axis of the flow-breaking plate are not parallel to each other, and the acute angle between the inclined grooves near the edge of the flow-breaking plate and the vertical direction gradually decreases.

6. The marine engineering equipment laser additive manufacturing equipment according to claim 5, characterized in that: The moving component includes a drive wheel, mounting blocks, a connecting rod, and a first screw. The connecting rod is slidably disposed in a communicating groove, and the first screw is disposed in the communicating groove and threadedly connected to the center of the connecting rod. The top end of the first screw is drivenly connected to the output shaft of a servo motor. Two mounting blocks are respectively mounted on both ends of the connecting rod and are slidably disposed in a vertical groove. The drive wheel is mounted on the bottom of the mounting blocks, and the outer periphery of the drive wheel is configured as a conical surface adapted to the outer periphery of the subsea oil pipeline.

7. The marine engineering equipment laser additive manufacturing equipment according to claim 3, characterized in that: The scraping assembly includes a scraper, a mounting bracket, a slider, and a second screw. The side wall of the side plate has a groove, the slider is slidably disposed in the groove, the second screw is rotatably disposed in the second groove, and the second screw is threadedly connected to the slider. The top of the second screw is drivenly connected to the output shaft of a servo motor. The mounting bracket is mounted on the side wall of the slider, and the scraper is mounted on the bottom of the mounting bracket.

8. The marine engineering equipment laser additive manufacturing equipment according to claim 7, characterized in that: The positioning component includes a waterproof motor, a gear, an arc-shaped strip, and a toothed groove. The waterproof motor is installed inside the side plate, the gear is installed on the output shaft of the waterproof motor, the end of the arc-shaped strip is constructed in the shape of an isosceles trapezoid, and the upper width of the arc-shaped strip is greater than its lower width. The arc-shaped strip is slidably connected to the side plate for limiting, and the toothed groove is constructed at the top of the arc-shaped strip and is adapted to the gear.

9. The marine engineering equipment laser additive manufacturing equipment according to claim 6, characterized in that: The first screw and the second screw have different thread pitches, and the thread pitch of the first screw is greater than that of the second screw.

10. The marine engineering equipment laser additive manufacturing equipment according to claim 7, characterized in that: The length of the blade in the horizontal direction is less than the minimum distance between the two drive wheels, and the bottom of the blade is set to be an arc shape that adapts to the outer periphery of the subsea oil pipeline.

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