An automatic welding device and method for FPSO hull cross butt welding seam

Abstract

This invention discloses an automatic welding device and method for transverse butt welds on FPSO hulls, comprising hull steel plates and a mobile base plate. Two hull steel plates are provided, with connecting bevels on the sides of the two adjacent plates. Fixed columns are mounted on the mobile base plate via a height adjustment assembly. In this invention, a contact adaptive adjustment assembly ensures that the contact roller remains in constant contact with the hull steel plate during welding, allowing the welding head to adaptively adjust its position, always remaining on one side of the weld, resulting in more precise welding. A grinding assembly grinds the connecting bevels before welding, making the welded area smoother and flatter, which is beneficial for post-weld stability and prevents rust from affecting weld quality. After grinding, a blowing assembly removes debris and rust, resulting in a cleaner connecting bevel and ensuring weld quality.

Description

Technical Field

[0001] This invention relates to the field of ship hull welding technology, and in particular to an automatic welding device and welding method for transverse butt welds of FPSO hulls. Background Technology

[0002] Floating Production Storage and Offloading (FPSO) vessels are key facilities for offshore oil development. An FPSO hull is typically a large, integrated offshore oil production base that combines oil and gas separation, treatment of oily wastewater, power generation, heating, and storage and transportation of crude oil products. FPSO hulls have the advantages of strong resistance to wind and waves, wide adaptability to water depths, large oil storage / unloading capacity, and portability and reusability.

[0003] The transverse butt welds used in FPSOs refer to the process of joining two steel plates together in the hull structure. This type of weld is often used for splicing two steel plates and is a very important part of the hull structure because it is directly related to the strength and watertightness of the hull. In practical applications, the welding process of transverse butt welds needs to consider multiple factors, including the thickness of the plates, the welding method, and the bevel design. For thicker plates, double-sided beveling is generally required to ensure full penetration during welding. The bevel angle is usually between 40° and 60°, and the cross-sectional shape of the bevel includes V-shape, U-shape, X-shape, K-shape, etc. The main welding methods are electric arc welding and gas welding, among which electric arc welding is the most widely used in shipbuilding and repair due to its high efficiency and convenience.

[0004] The transverse butt weld of an FPSO hull refers to a weld that connects two steel plates laterally, aligning their edges to form a straight weld. In shipbuilding, this type of weld is commonly used to connect transverse hull components, such as bottom plates and side plates, to ensure the structural integrity and strength of the hull. Steel is the most commonly used metal material in shipbuilding. During the welding of the two steel plates in the transverse groove, the bevels of the steel plates are not pre-cut on-site but pre-processed. Since steel plates are prone to rust when exposed to air, the resulting rust can affect the stability of the weld. Furthermore, some steel plates are not horizontal during the welding process, and horizontal movement during welding can lead to problems such as the weld joint not fitting well together, resulting in a weak weld. To ensure the safety of FPSO hulls during deep-sea navigation, an automatic welding device and welding method for transverse butt welds of FPSO hulls are proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic welding device and method for transverse butt welds on FPSO hulls. This addresses the issue that the bevels of steel plates are not pre-cut on-site but pre-processed. Since steel plates are prone to rust when exposed to air, the resulting rust can affect the stability of the weld. Furthermore, during the welding process, some steel plates are not horizontal, and horizontal movement during welding can lead to problems such as the weld joint not fitting well against the weld seam, resulting in weak welds.

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

[0007] An automatic welding device for transverse butt welds on FPSO hulls includes hull steel plates and a mobile base plate. Two hull steel plates are provided, with connecting bevels on the sides of the two adjacent plates. A fixed column is mounted on the mobile base plate via a height adjustment assembly. A transverse rod is rotatably mounted on the top of the fixed column. A telescopic cylinder is rotatably connected between the transverse rod and the fixed column. A moving rod is mounted on one end of the transverse rod via a contact adaptive adjustment assembly. A T-shaped connecting block is fixedly mounted on one end of the moving rod. A welding head is provided on one side of the T-shaped connecting block. A bevel limiting assembly is provided on the side of the T-shaped connecting block. A side support rod is fixedly mounted on one side of the moving rod. A grinding assembly and a blowing assembly are provided on one side of the side support rod. The grinding assembly and the blowing assembly are used for cleaning the steel plates before welding.

[0008] Preferably, the lifting height adjustment assembly includes a lifting cylinder fixedly installed on the top of the equipment moving base plate, the output end of the lifting cylinder is connected to a top mounting plate, the bottom end of the fixing column is fixedly installed on the top of the top mounting plate, and multiple telescopic cylinders are provided between the top mounting plate and the equipment moving base plate.

[0009] Preferably, the bevel limiting assembly includes two mounting blocks fixedly installed on the side of the T-shaped connecting block. Side brackets are fixedly installed on the top and bottom of each mounting block, and bevel limiting rollers are rotatably installed on each of the two side brackets. The two bevel limiting rollers are in contact with the two connecting bevels respectively.

[0010] Preferably, the bevel limiting rollers on the two mounting blocks are located on both sides of the welding head.

[0011] Preferably, the grinding assembly includes two equipment blocks fixedly mounted on the side support rod. A grinding motor is rotatably mounted on the end of each equipment block. A grinding disc is fixedly mounted on the output end of each of the two grinding motors. The grooves of the two grinding discs are symmetrically arranged and are adapted to the two connecting bevels respectively.

[0012] Preferably, a fixing block is fixedly installed on the equipment block, a threaded adjusting column is threadedly installed on the fixing block, an end block is rotatably installed at one end of the threaded adjusting column, an adjusting rod is rotatably connected between the end block and the grinding motor, and a limit sleeve is fixedly installed on the side of the end block, the limit sleeve is slidably sleeved on the equipment block.

[0013] Preferably, the blower assembly includes a blower fixedly installed on the top of the horizontal rod, a pipe connected to one side of the blower, a mounting rod fixedly installed on one side of the side support rod, an air outlet installed on one side of the mounting rod, and one end of the pipe connected to the air outlet.

[0014] Preferably, the contact adaptive adjustment component includes a connecting bracket fixedly installed at the bottom of the moving rod, an installation frame fixedly installed on one side of the connecting bracket, a plate magnetic block fixedly installed on the side wall of the installation frame, and two contact rollers rotatably installed on the installation frame, the two contact rollers contacting the side of the hull steel plate.

[0015] Preferably, one end of the transverse rod is provided with a moving groove, one end of the moving rod extends into the moving groove, and a compression spring is fixedly installed between the moving rod and the inner wall of the moving groove.

[0016] An automated welding method for transverse butt welds on FPSO hulls, the method comprising:

[0017] Step 1: During the welding process of the hull, the base plate of the welding equipment is pushed to one side of the hull steel plate. The overall position is adjusted so that the welding head is on one side of the weld. The lifting height adjustment component can adjust the height of the crossbar welding head according to the height of the weld. It is highly adaptable. After adjustment, the welding operation can be carried out.

[0018] Step 2: During welding, the equipment is moved by moving the base plate to achieve mobile welding operation. The grinding component is set up, and the grinding operation of the grinding disc can grind the rust at the joint bevel, making the welded part smoother and flatter, which is beneficial to the stability of the weld and avoids rust on the welded part, which would affect the welding quality.

[0019] Step 3: The blower assembly generates a powerful airflow, which is transported through the pipes and finally blown out from the nozzle, removing the debris and rust produced during grinding. This prevents debris and rust from remaining at the joint bevel, making the joint bevel cleaner and ensuring the quality of subsequent welding.

[0020] Step 4: During the welding process, the bevel limiting component is set up. The two sets of bevel limiting rollers on the bevel limiting component are located on both sides of the welding head to guide and limit the welding head, ensuring that the welding head is always aligned with the weld position and guaranteeing the accuracy of the weld.

[0021] Step 5: The contact adaptive adjustment component is set up so that during the welding process, the two contact rollers on the contact adaptive adjustment component can always be in contact with the surface of the hull steel plate. Through the push of the compression spring, adaptive movement adjustment can be achieved, so that the welding head is always in the position of the weld seam, making the welding more precise.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In this invention, the automatic welding device for transverse butt welds of ship hulls utilizes a lifting and adjusting component to ensure that the welding head and the connecting bevel are at the same height. The moving base plate of the device enables moving welding. The bevel limiting component guides and limits the welding head, ensuring that it is always aligned with the weld position and guaranteeing the accuracy of the weld.

[0024] 2. In this invention, the contact adaptive adjustment component ensures that the contact roller remains in contact with the hull steel plate during the welding process. By utilizing the pushing force of the compression spring, the welding head can adaptively adjust its position, always remaining on one side of the weld, resulting in more precise welding.

[0025] 3. In this invention, the grinding component grinds the bevel before welding, making the welded part smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welded part, which would affect the welding quality. After grinding, the blower component blows away the debris and rust, making the bevel cleaner, ensuring the welding quality, and ensuring the safety of the FPSO hull in deep sea navigation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention viewed from the left side;

[0027] Figure 2 This is a three-dimensional structural schematic diagram of the present invention viewed from the right side;

[0028] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0029] Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the blower assembly of the present invention;

[0031] Figure 6 This is a partial three-dimensional structural schematic diagram of the present invention;

[0032] Figure 7 This is a schematic diagram of the grinding component of the present invention.

[0033] In the diagram: 1. Hull steel plate; 2. Connecting bevel; 3. Equipment moving base plate; 4. Lifting cylinder; 5. Top mounting plate; 6. Telescopic cylinder; 7. Fixed column; 8. Horizontal bar; 9. Telescopic cylinder; 10. Moving groove; 11. Moving rod; 12. Compression spring; 13. T-shaped connecting block; 14. Welding head; 15. Mounting block; 16. Side bracket; 17. Bevel limiting roller; 18. Connecting bracket; 19. Mounting frame; 20. Plate magnetic block; 21. Contact roller; 22. Side support rod; 23. Equipment block; 24. Grinding motor; 25. Grinding disc; 26. Fixed block; 27. Threaded adjusting column; 28. End block; 29. ​​Adjusting rod; 30. Limiting sleeve; 31. Blower; 32. Pipe; 33. Mounting rod; 34. Air outlet. Detailed Implementation

[0034] 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.

[0035] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this patent based on the specific circumstances.

[0036] Example: Refer to Figure 1 , Figure 2 and Figure 3As shown, an automatic welding device for transverse butt welds of FPSO hulls includes a hull steel plate 1 and an equipment moving base plate 3. Two hull steel plates 1 are provided, with connecting bevels 2 on the sides of the two adjacent plates. A fixed column 7 is mounted on the equipment moving base plate 3 via a lifting height adjustment assembly. A transverse rod 8 is rotatably mounted on the top of the fixed column 7. The lifting height adjustment assembly includes a lifting cylinder 4 fixedly mounted on the top of the equipment moving base plate 3. The output end of the lifting cylinder 4 is connected to a top mounting plate 5. The bottom end of the fixed column 7 is fixedly mounted on the top of the top mounting plate 5. Multiple [unclear] are provided between the top mounting plate 5 and the equipment moving base plate 3. The telescopic cylinder 6 pushes the equipment moving base plate 3 used for welding to one side of the hull steel plate 1, adjusts the overall position so that the welding head 14 is located on one side of the weld. The lifting cylinder 4 on the lifting height adjustment component can adjust the height of the crossbar welding head 14 according to the height of the weld, which is highly adaptable. After adjustment, the weld can be welded. The telescopic cylinder 9 is rotatably connected between the transverse bar 8 and the fixed column 7. When the entire hull steel plate 1 and the equipment moving base plate 3 are at a certain angle, the telescopic cylinder 9 is used to adjust the tilt position of the transverse bar 8, thereby ensuring that the tilt angle is consistent with that of the hull steel plate 1, which facilitates subsequent welding operations.

[0037] As a technical optimization of the present invention, referring to... Figure 1 , Figure 3 and Figure 4As shown, a movable rod 11 is mounted on one end of the transverse rod 8 via a contact adaptive adjustment assembly. A T-shaped connecting block 13 is fixedly mounted on one end of the movable rod 11. A welding head 14 is provided on one side of the T-shaped connecting block 13. The contact adaptive adjustment assembly includes a connecting bracket 18 fixedly mounted on the bottom of the movable rod 11. A mounting frame 19 is fixedly mounted on one side of the connecting bracket 18. A plate magnetic block 20 is fixedly mounted on the side wall of the mounting frame 19. Two contact rollers 21 are rotatably mounted on the mounting frame 19. The two contact rollers 21 are in contact with the side of the hull steel plate 1. A movable groove 10 is opened at one end of the transverse rod 8. One end of the movable rod 11 extends into the movable groove 10. A compression spring 12 is fixedly installed between the movable rod 11 and the inner wall of the movable groove 10. In the adaptive adjustment component, during the welding process, the two contact rollers 21 on the adaptive adjustment component can always be in contact with the surface of the hull steel plate 1. Through surface contact, the welding head 14 can be kept on one side of the weld. When the hull steel plate 1 bends or dents to a certain extent, a gap will be generated between the welding head 14 and the weld during traditional moving welding, which cannot effectively weld the weld. In this solution, the contact rollers 21 can always be in contact with the hull steel plate 1 and move with the bending of the hull steel plate 1. At this time, under the pushing action of the compression spring 12, the moving rod 11 can be driven to move. Through the pushing action of the compression spring 12, adaptive movement adjustment can be achieved, so that the welding head 14 is always on one side of the weld, and the welding is more precise.

[0038] As a technical optimization of the present invention, referring to... Figure 1 Figure 6 As shown, a bevel limiting component is provided on the side of the T-shaped connecting block 13. The bevel limiting component includes two mounting blocks 15 fixedly installed on the side of the T-shaped connecting block 13. Side brackets 16 are fixedly installed on the top and bottom of the mounting blocks 15. Bevel limiting rollers 17 are rotatably installed on the two side brackets 16. The two bevel limiting rollers 17 are in contact with the two connecting bevels 2 respectively. The bevel limiting rollers 17 on the two mounting blocks 15 are located on both sides of the welding head 14. During the welding process, the bevel limiting component is provided on both sides of the welding head 14. The two sets of bevel limiting rollers 17 on the bevel limiting component are located on both sides of the welding head 14 respectively. By guiding and limiting the two sets of bevel limiting rollers 17 before and after movement, the welding head 14 can always be aligned with the weld position, ensuring the accuracy of the weld and effectively avoiding the problem of inaccurate weld due to the displacement of the welding head 14.

[0039] As a technical optimization of the present invention, referring to... Figure 1 and Figure 7As shown, a side support rod 22 is fixedly installed on one side of the moving rod 11. A grinding assembly and a blowing assembly are provided on one side of the side support rod 22. The grinding assembly and the blowing assembly are used to clean the steel plate before welding. The grinding assembly includes two equipment blocks 23 fixedly installed on the side support rod 22. A grinding motor 24 is rotatably installed at the end of each equipment block 23. A grinding disc 25 is fixedly installed at the output end of each of the two grinding motors 24. The grooves of the two grinding discs 25 are symmetrically arranged and are adapted to the two connecting bevels 2 respectively. A fixing block 26 is fixedly installed on the equipment block 23. A threaded adjusting column 27 is threadedly installed on the fixing block 26. An end block 28 is rotatably installed at one end of the threaded adjusting column 27. An adjusting rod 29 is rotatably connected between the end block 28 and the grinding motor 24. A limiting sleeve 30 is fixedly installed on the side of the end block 28. The limiting sleeve 30 is slidably sleeved on the equipment block 23. 3. During welding, the weld seam is welded by arc welding. The equipment is moved by the base plate 3 to achieve mobile welding. During the welding process, the grinding motor 24 on the grinding assembly is started to drive the grinding disc 25 to rotate. The two grinding discs 25 are symmetrically arranged and contact the two connecting bevels 2 respectively. Through the grinding operation of the grinding discs 25, the rust at the connecting bevel 2 can be ground, making the welded part smoother and flatter, which is beneficial to the stability after welding and avoids the welding part from having rust, which affects the welding quality. The rotation of the threaded adjustment column 27 can drive the end block 28 to move, thereby adjusting the grinding angle of the grinding disc 25 under the action of the adjustment rod 29. By adjusting, it can adapt to different connecting bevels 2 for grinding operations. The limiting sleeve 30 can limit the horizontal position of the movement of the end block 28.

[0040] As a technical optimization of the present invention, referring to... Figure 1 and Figure 5 As shown, the blower assembly includes a blower 31 fixedly installed on the top of the transverse rod 8. A pipe 32 is connected to one side of the blower 31, and an installation rod 33 is fixedly installed on one side of the side support rod 22. An air outlet 34 is installed on one side of the installation rod 33. One end of the pipe 32 is connected to the air outlet 34. While the front of the welding is being ground, the blower 31 on the blower assembly also operates synchronously. The blower 31 generates a strong airflow, which is conveyed through the pipe 32 and finally blown out from the air outlet 34. The air outlet 34 is set at an angle so that it can blow air forward and blow away the debris and rust generated by the grinding, preventing debris and rust from remaining at the connection bevel 2, making the connection bevel 2 cleaner, ensuring the welding quality of the subsequent welding, and ensuring the safety of the FPSO hull in deep-sea navigation.

[0041] An automated welding method for transverse butt welds on FPSO hulls, the method comprising:

[0042] Step 1: During the welding of the hull, the base plate 3 of the welding equipment is pushed to one side of the hull steel plate 1. The overall position is adjusted so that the welding head 14 is located on one side of the weld. The lifting height adjustment component can adjust the height of the crossbar welding head 14 according to the height of the weld. It is highly adaptable. After the adjustment is completed, the welding operation can be carried out.

[0043] Step 2: During welding, the equipment moves by moving the base plate 3, thereby realizing the mobile welding operation. The grinding component is set up, and the grinding operation of the grinding disc 25 can grind the rust at the connection bevel 2, making the welded part smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welded part, which would affect the welding quality.

[0044] Step 3: The blower assembly is set up. The blower 31 generates a strong airflow, which is transported through the pipe 32 and finally blown out from the nozzle 34. This blows away the debris and rust generated during grinding, preventing debris and rust from remaining at the connection bevel 2, making the connection bevel 2 cleaner and ensuring the quality of subsequent welding.

[0045] Step 4: During the welding process, the bevel limiting component is set up. The two sets of bevel limiting rollers 17 on the bevel limiting component are located on both sides of the welding head 14 to achieve guidance and limitation, so that the welding head 14 is always aligned with the weld position, ensuring the accuracy of the weld.

[0046] Step 5: The contact adaptive adjustment component is set up so that during the welding process, the two contact rollers 21 on the contact adaptive adjustment component can always be in contact with the surface of the hull steel plate 1. By pushing the compression spring 12, adaptive movement adjustment can be achieved, so that the welding head 14 is always in the position of the weld seam, making the welding more precise.

[0047] In use: During the welding process of the hull, the equipment moving base plate 3 is pushed to one side of the hull steel plate 1, and the overall position is adjusted so that the welding head 14 is located on one side of the weld. The lifting height adjustment component is set to adjust the height of the crossbar welding head 14, which is highly adaptable. After adjustment, the welding operation can be carried out. During welding, the equipment moving base plate 3 is moved to realize the mobile welding operation. During the welding process, the grinding component is activated to grind the rust at the connection bevel 2, making the welded part smoother and flatter, which is beneficial to the stability of the welded part and avoids rust on the welded part, which would affect the welding quality and ensure the FPSO vessel. To ensure the safety of the vessel during deep-sea navigation, the blower assembly is activated simultaneously with welding. The blower 31 generates a powerful airflow that blows out from the nozzle 34, removing grinding debris and rust, making the connecting bevel 2 cleaner. The bevel limiting assembly, guided and limited by two sets of bevel limiting rollers 17 moving forward and backward, ensures that the welding head 14 is always aligned with the weld position, guaranteeing the accuracy of the weld. The contact adaptive adjustment assembly ensures that the two contact rollers 21 are always in contact with the surface of the hull steel plate 1 during welding. Through the push of the compression spring 12, adaptive movement adjustment is achieved, keeping the welding head 14 always on one side of the weld, making the welding more precise.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] 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. An automatic welding device for transverse butt welds of FPSO hulls, comprising a hull steel plate (1) and a moving base plate (3), characterized in that, The hull steel plate (1) is provided in two pieces. The two hull steel plates (1) that are close to each other are provided with connecting bevels (2) on their sides. The equipment moving base plate (3) is equipped with a fixed column (7) through a lifting height adjustment component. A transverse rod (8) is rotatably installed on the top of the fixed column (7). A telescopic cylinder (9) is rotatably connected between the transverse rod (8) and the fixed column (7). A moving rod (11) is installed on one end of the transverse rod (8) through a contact adaptive adjustment component. A T-shaped connecting block (13) is fixedly installed on one end of the moving rod (11). A welding head (14) is provided on one side of the T-shaped connecting block (13). A bevel limiting component is provided on the side of the T-shaped connecting block (13). A side support rod (22) is fixedly installed on one side of the moving rod (11). A grinding component and a blowing component are provided on one side of the side support rod (22). The grinding component and the blowing component are used to clean the steel plate before welding. The bevel limiting assembly includes two mounting blocks (15) fixedly installed on the side of the T-shaped connecting block (13). Side brackets (16) are fixedly installed on the top and bottom of the mounting blocks (15). Bevel limiting rollers (17) are rotatably installed on the two side brackets (16). The two bevel limiting rollers (17) are in contact with the two connecting bevels (2) respectively. The grinding assembly includes two equipment blocks (23) fixedly installed on the side support rod (22). Each end of the equipment block (23) is rotatably mounted with a grinding motor (24). The output ends of the two grinding motors (24) are fixedly mounted with grinding discs (25). The two grinding discs (25) are symmetrically arranged and are adapted to the two connecting bevels (2). The contact adaptive adjustment assembly includes a connecting bracket (18) fixedly installed at the bottom of the moving rod (11). A mounting frame (19) is fixedly installed on one side of the connecting bracket (18). A plate magnetic block (20) is fixedly installed on the side wall of the mounting frame (19). Two contact rollers (21) are rotatably installed on the mounting frame (19). The two contact rollers (21) are in contact with the side of the hull steel plate (1). A moving groove (10) is opened at one end of the transverse rod (8). One end of the moving rod (11) extends into the moving groove (10). A compression spring (12) is fixedly installed between the moving rod (11) and the inner wall of the moving groove (10).

2. The automatic welding device for transverse butt welds of FPSO hulls according to claim 1, characterized in that, The lifting height adjustment assembly includes a lifting cylinder (4) fixedly installed on the top of the equipment moving base plate (3). The output end of the lifting cylinder (4) is connected to a top mounting plate (5). The bottom end of the fixed column (7) is fixedly installed on the top of the top mounting plate (5). Multiple telescopic cylinders (6) are provided between the top mounting plate (5) and the equipment moving base plate (3).

3. The apparatus for automatic welding of FPSO hull cross butt welds as claimed in claim 1 wherein, The bevel limiting rollers (17) on the two mounting blocks (15) are located on both sides of the welding head (14).

4. The apparatus for automatic welding of FPSO hull cross butt welds as claimed in claim 1 wherein, A fixing block (26) is fixedly installed on the equipment block (23). A threaded adjusting column (27) is threadedly installed on the fixing block (26). An end block (28) is rotatably installed on one end of the threaded adjusting column (27). An adjusting rod (29) is rotatably connected between the end block (28) and the grinding motor (24). A limiting sleeve (30) is fixedly installed on the side of the end block (28). The limiting sleeve (30) is slidably sleeved on the equipment block (23).

5. The apparatus for automatic welding of FPSO hull cross butt welds as claimed in claim 1 wherein, The blower assembly includes a blower (31) fixedly installed on the top of the horizontal bar (8), a pipe (32) connected to one side of the blower (31), an mounting rod (33) fixedly installed on one side of the side support rod (22), an air outlet (34) installed on one side of the mounting rod (33), and one end of the pipe (32) connected to the air outlet (34).

6. An automatic welding method for transverse butt welds of FPSO hulls according to any one of claims 1-5, the method comprising: Step 1: During the welding process of the hull, the equipment moving base plate (3) used for welding is pushed to one side of the hull steel plate (1), and the overall position is adjusted so that the welding head (14) is located on one side of the weld. The lifting height adjustment component can adjust the height of the crossbar welding head (14) according to the height of the weld. It is highly adaptable. After the adjustment is completed, the welding operation can be carried out on the weld. Step 2: During welding, the equipment is moved by moving the base plate (3) to realize the mobile welding operation. The grinding component is set up, and the grinding operation of the grinding disc (25) can grind the rust at the connection bevel (2), making the welded part smoother and flatter, which is beneficial to the stability after welding and avoids the welded part from having rust, which affects the welding quality. Step 3: The blower assembly is set up. The blower (31) generates a strong blower, which is transported through the pipe (32) and finally blown out from the air outlet (34) to blow away the debris and rust generated by grinding, so as to avoid debris and rust remaining at the position of the connecting bevel (2), making the connecting bevel (2) cleaner and ensuring the welding quality of the later stage. Step 4: During the welding process, the bevel limiting component is set up. The two sets of bevel limiting rollers (17) on the bevel limiting component are located on both sides of the welding head (14) to achieve guidance and limitation, so that the welding head (14) can always be aligned with the weld position, ensuring the accuracy of the weld. Step 5: The contact adaptive adjustment component is set up so that during the welding process, the two contact rollers (21) on the contact adaptive adjustment component can always be in contact with the surface of the hull steel plate (1). By pushing the compression spring (12), adaptive movement adjustment can be achieved so that the welding head (14) is always in the position of the weld seam, and the welding is more precise.

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