Automatic welding device and welding method for FPSO ship body transverse butt welding seams

Abstract

The invention discloses an automatic welding device and method for FPSO ship body transverse butt welding seams, the automatic welding device comprises ship body steel plates and an equipment moving bottom plate, the number of the ship body steel plates is two, connecting grooves are formed in the side portions of the two ship body steel plates close to each other, and a fixing column is installed on the equipment moving bottom plate through a lifting height adjusting assembly; according to the ship body steel plate welding device, the contact roller is always in contact with a ship body steel plate during welding through the arranged contact self-adaptive adjusting assembly, the welding head can adjust the position in a self-adaptive mode and is always located at the position of one side of a welding seam, welding is more accurate, a connecting groove is polished through the arranged polishing assembly before welding, the welded part is smoother and smoother, and welding quality is improved. Stability after welding is facilitated, the problem that the welding quality is affected due to the fact that a welding part has rust is solved, chippings and rust are blown away through the air blowing assembly after grinding, and therefore the position of a connecting groove is cleaner, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hull welding, and in particular to an automatic welding device and a welding method for a transverse butt weld of an FPSO hull. Background Art

[0002] Offshore floating production storage and offloading vessels (FPSO) are key facilities for offshore oil development. The FPSO hull is usually a comprehensive large-scale offshore oil production base, integrating oil and gas separation, oily wastewater treatment, power generation, heating, storage and transportation of crude oil products. The FPSO hull has the advantages of strong wind and wave resistance, wide adaptability to water depths, large oil storage / unloading capacity, and transferability and reuse.

[0003] The transverse butt weld used in FPSO refers to the process of connecting two steel plates together by welding in the hull structure. This weld is often used for the splicing of 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 the transverse butt weld needs to consider multiple factors, including the thickness of the plate, welding method, groove design, etc. For thicker plates, double-sided grooves are generally required to ensure full penetration during welding. The groove angle is usually between 40° and 60°, and the cross-sectional shapes of the groove are V-shaped, U-shaped, X-shaped, K-shaped, etc. The main welding methods are arc welding and gas welding. Among them, arc welding is the most widely used in ship repair due to its high efficiency and convenience.

[0004] The transverse butt weld of the FPSO hull refers to a transverse butt weld. This weld is to align the edges of two steel plates and connect them horizontally to form a straight weld. In shipbuilding, this weld is usually used to connect the transverse components of the hull, such as the bottom plate, the side plate, etc., to ensure the structural integrity and strength of the hull. Steel is the most commonly used metal material in shipbuilding. In the process of welding the two steel plates of the transverse groove, since the groove of the steel plate is not cut on site but processed before, the steel plate is easily corroded due to contact with the air, and the rust will affect the stability of the steel plate welding. In the welding process, some steel plates are not horizontal. Through horizontal movement welding, there will be a problem that the welding head cannot fit the weld well, resulting in a problem of loose welding. In order to ensure the safety of the FPSO hull in deep sea navigation, an automatic welding device and welding method for the transverse butt weld of the FPSO hull are proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an automatic welding device and welding method for the transverse butt weld of an FPSO hull, which is used to solve the problem that the groove of the steel plate is not cut on site but is processed before. Since the steel plate is easily corroded when in contact with the air, the rust produced will affect the stability of the steel plate welding. In addition, during the welding process, some steel plates are not horizontal. Through horizontal movement welding, the welding head will not be able to fit the weld well, thereby causing the problem of loose welding.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: An automatic welding device for transverse butt welds of an FPSO hull comprises a hull steel plate and a movable bottom plate of the equipment, wherein the hull steel plates are provided with two pieces, and the sides of the two hull steel plates close to each other are provided with connecting grooves, a fixed column is installed on the movable bottom plate of the equipment through a lifting height adjustment component, a transverse rod is rotatably installed 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 installed on one end of the transverse rod through a contact adaptive adjustment component, a T-shaped connecting block is fixedly installed on one end of the moving rod, a welding head is provided on one side of the T-shaped connecting block, a groove limiting component is provided on the side of the T-shaped connecting block, a side support rod is fixedly installed on one side of the moving rod, a grinding component and a blowing component are provided on one side of the side support rod, and the grinding component and the blowing component are used for cleaning the steel plate before welding.

[0007] Preferably, the lifting height adjustment assembly includes a lifting cylinder fixedly mounted on the top of the moving base plate of the equipment, the output end of the lifting cylinder is connected to the top mounting plate, the bottom end of the fixed column is fixedly mounted on the top of the top mounting plate, and a plurality of telescopic cylinders are arranged between the top mounting plate and the moving base plate of the equipment.

[0008] Preferably, the groove limit assembly includes two mounting blocks fixedly mounted on the sides of the T-shaped connecting block, and side brackets are fixedly mounted on the top and bottom of the mounting blocks. Groove limit rollers are rotatably mounted on the two side brackets, and the two groove limit rollers are respectively in contact with the two connecting grooves.

[0009] Preferably, the groove limiting rollers on the two mounting blocks are located on both sides of the welding head.

[0010] Preferably, the grinding assembly includes two equipment blocks fixedly mounted on side support rods, the ends of the equipment blocks are rotatably mounted with grinding motors, the output ends of the two grinding motors are fixedly mounted with grinding discs, the two grinding disc grooves are symmetrically arranged and respectively matched with the two connecting grooves.

[0011] Preferably, a fixed block is fixedly installed on the equipment block, a threaded adjustment column is threadedly installed on the fixed block, an end block is rotatably installed on one end of the threaded adjustment column, an adjustment rod is rotatably connected between the end block and the grinding motor, a limiting sleeve is fixedly installed on the side of the end block, and the limiting sleeve is slidably connected to the equipment block.

[0012] Preferably, the blowing assembly includes a hair dryer fixedly mounted on the top of the transverse rod, a pipe is connected to one side of the hair dryer, a mounting rod is fixedly mounted on one side of the side support rod, an air outlet is installed on one side of the mounting rod, and one end of the pipe is connected to the air outlet.

[0013] Preferably, the contact adaptive adjustment component includes a connecting bracket fixedly installed at the bottom of the moving rod, a mounting frame fixedly installed on one side of the connecting bracket, a plate magnetic block fixedly installed on the side wall of the mounting frame, and two contact rollers rotatably installed on the mounting frame, and the two contact rollers are in contact with the side of the hull steel plate.

[0014] Preferably, a moving groove is formed at one end of the transverse rod, 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.

[0015] An automatic welding method for a transverse butt weld of an FPSO hull, the method comprising: Step 1: During the welding of the hull, push the mobile bottom plate of the welding equipment to one side of the hull steel plate, adjust the overall position so that the welding head is located on one side of the weld, and set the lifting height adjustment component to adjust the height of the crossbar welding head according to the height of the weld. It has strong adaptability, and the weld can be welded after adjustment; Step 2: During welding, the mobile bottom plate of the equipment is moved to realize mobile welding operation. The rust on the connection groove can be polished by the grinding disc on the grinding assembly, making the welded part smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welded part, which affects the welding quality. Step 3: The blower assembly is set up, and the blower produces strong air, which is transported through the pipeline and finally blown out from the air outlet to blow away the debris and rust produced by grinding, so as to avoid the debris and rust being left at the connection groove, making the connection groove cleaner and ensuring the welding quality at the back; Step 4: During the welding process, a groove limit assembly is set. Two sets of groove limit rollers on the groove limit assembly are respectively located on both sides of the welding head to achieve guidance and limit, so that the welding head can always align with the weld position, ensuring the accuracy of the weld; Step 5: Set up the contact adaptive adjustment component. 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 extrusion spring, adaptive movement adjustment can be achieved, so that the welding head is always on one side of the weld, and the welding is more precise.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the automatic welding device for the transverse butt weld of the hull uses a lifting and adjusting component to make the welding head and the connecting groove at the same height, and realizes mobile welding by moving the mobile bottom plate of the equipment. The groove limiter component is provided to guide and limit, so that the welding head can always align with the weld position, thereby ensuring the accuracy of the weld welding; 2. In the present invention, a contact adaptive adjustment component is provided. During the welding process, the contact roller is always in contact with the hull steel plate. By utilizing the pushing force of the extrusion spring, the welding head can adaptively adjust its position and always be located on one side of the weld, making the welding more accurate. 3. In the present invention, a grinding component is provided to grind the connection groove before welding to make the welded part smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welded part, which affects the welding quality. After grinding, the debris and rust are blown away by the blowing component, so that the connection groove position is cleaner, ensuring the welding quality and ensuring the safety of the FPSO hull sailing in the deep sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention when viewed from the left side; Figure 2 It is a schematic diagram of the structure of the present invention when observing the three-dimensional structure from the right side; Figure 3 It is a schematic diagram of the structure of the present invention in cross section; Figure 4 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 5 It is a schematic diagram of the structure of the blowing assembly of the present invention; Figure 6 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 7 It is a schematic structural diagram of the grinding assembly of the present invention.

[0018] In the figure: 1. hull steel plate; 2. connecting groove; 3. equipment moving bottom plate; 4. lifting cylinder; 5. top mounting plate; 6. telescopic cylinder; 7. fixed column; 8. transverse rod; 9. telescopic cylinder; 10. moving groove; 11. moving rod; 12. extrusion spring; 13. T-type connecting block; 14. welding head; 15. mounting block; 16. side bracket; 17. groove limit 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 adjustment column; 28. end block; 29. ​​adjustment rod; 30. limit sliding sleeve; 31. hair dryer; 32. pipeline; 33. mounting rod; 34. air outlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of this patent, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0021] Example: Refer to Figure 1 , Figure 2 and Figure 3As shown, an automatic welding device for FPSO hull transverse butt welds includes a hull steel plate 1 and a mobile bottom plate 3 of the equipment. The hull steel plate 1 is provided with two pieces, and the sides of the two hull steel plates 1 close to each other are provided with connecting grooves 2. A fixed column 7 is installed on the mobile bottom plate 3 of the equipment through a lifting height adjustment component. A transverse rod 8 is rotatably installed on the top of the fixed column 7. The lifting height adjustment component includes a lifting cylinder 4 fixedly installed on the top of the mobile bottom plate 3 of the equipment. 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. A plurality of The telescopic cylinder 6 pushes the mobile base plate 3 of the welding equipment to one side of the hull steel plate 1, and 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 cross bar welding head 14 according to the height of the weld. It has strong adaptability and can be used to weld the weld after adjustment. The transverse rod 8 and the fixed column 7 are rotatably connected with a telescopic cylinder 9. When the entire hull steel plate 1 and the mobile base plate 3 of the equipment present a certain inclination angle, the telescopic cylinder 9 is used to operate and adjust the inclination position of the transverse rod 8 to ensure that it is consistent with the inclination angle of the hull steel plate 1, which is convenient for subsequent welding operations.

[0022] As a technical optimization solution of the present invention, refer to Figure 1 , Figure 3 and Figure 4As shown, one end of the transverse rod 8 is installed with a moving rod 11 through a contact adaptive adjustment component, one end of the moving rod 11 is fixedly installed with a T-shaped connecting block 13, one side of the T-shaped connecting block 13 is provided with a welding head 14, the contact adaptive adjustment component includes a connecting bracket 18 fixedly installed at the bottom of the moving rod 11, one side of the connecting bracket 18 is fixedly installed with a mounting frame 19, the side wall of the mounting frame 19 is fixedly installed with a plate magnetic block 20, two contact rollers 21 are rotatably installed on the mounting frame 19, and the two contact rollers 21 are in contact with the side of the hull steel plate 1, one end of the transverse rod 8 is provided with a moving groove 10, one end of the moving rod 11 extends into the moving groove 10, an extrusion spring 12 is fixedly installed between the moving rod 11 and the inner wall of the moving groove 10, and the contact Adaptive adjustment component. During the welding process, the two contact rollers 21 on the contact adaptive adjustment component can always contact with the surface of the hull steel plate 1. Through surface contact, it can ensure that the welding head 14 is on one side of the weld. When the hull steel plate 1 is bent and concave to a certain extent, a gap will be generated between the welding head 14 and the weld during traditional mobile welding, and the weld cannot be effectively welded. In this solution, the contact roller 21 can always contact with the hull steel plate 1 and move with the bending of the hull steel plate 1. At this time, under the push of the extrusion spring 12, the moving rod 11 can be driven to move. Through the push of the extrusion spring 12, adaptive mobile adjustment can be achieved, so that the welding head 14 is always on one side of the weld, and the welding is more precise.

[0023] As a technical optimization solution of the present invention, refer to Figure 1 Figure 6 As shown, a groove limiting assembly is provided on the side of the T-shaped connecting block 13, and the groove limiting assembly includes two mounting blocks 15 fixedly mounted on the side of the T-shaped connecting block 13, and side brackets 16 are fixedly mounted on the top and bottom of the mounting blocks 15, and groove limiting rollers 17 are rotatably mounted on the two side brackets 16, and the two groove limiting rollers 17 are respectively in contact with the two connecting grooves 2, and the groove limiting rollers 17 on the two mounting blocks 15 are located on both sides of the welding head 14. During the welding process, groove limiting assemblies are provided on both sides of the welding head 14, and two groups of groove limiting rollers 17 on the groove limiting assembly are respectively located on both sides of the welding head 14. By guiding and limiting the two groups of groove limiting rollers 17 before and after moving, the welding head 14 can always be aligned with the weld position, thereby ensuring the accuracy of weld welding and effectively avoiding the problem of inaccurate weld welding caused by the offset of the welding head 14.

[0024] As a technical optimization solution of the present invention, refer to Figure 1 and Figure 7As shown, a side support rod 22 is fixedly installed on one side of the moving rod 11, and a grinding assembly and a blowing assembly are arranged 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, and grinding motors 24 are rotatably installed at the ends of the equipment blocks 23. Grinding discs 25 are fixedly installed at the output ends of the two grinding motors 24. The grooves of the two grinding discs 25 are symmetrically arranged and respectively matched with the two connecting grooves 2. A fixed block 26 is fixedly installed on the equipment block 23, and a threaded adjustment column 27 is threadedly installed on the fixed block 26. An end block 28 is rotatably installed on one end of the threaded adjustment 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, and the limiting sleeve 30 is slidably sleeved on the equipment block 2 3, during welding, the weld is welded by arc welding, and the mobile base plate 3 is moved by the equipment to realize mobile welding operation. During the welding process, the grinding motor 24 on the grinding assembly is started to run, driving the grinding disc 25 to rotate. The two grinding discs 25 are symmetrically arranged and contact the two connecting grooves 2 respectively. Through the grinding operation of the grinding disc 25, the rust at the connecting groove 2 can be polished to make the welded part smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welding part, which affects the welding quality. The rotation of the threaded adjustment column 27 can drive the end block 28 to move, so that under the action of the adjusting rod 29, the grinding angle of the grinding disc 25 can be adjusted. Through adjustment, it can adapt to different connecting grooves 2 for grinding operations. The limit sleeve 30 is set to limit the horizontal position of the movement of the end block 28.

[0025] As a technical optimization solution of the present invention, refer to Figure 1 and Figure 5 As shown, the blowing assembly includes a hair dryer 31 fixedly mounted on the top of the transverse rod 8, a pipe 32 is connected to one side of the hair dryer 31, a mounting rod 33 is fixedly mounted on one side of the side support rod 22, an air outlet 34 is mounted on one side of the mounting rod 33, one end of the pipe 32 is connected to the air outlet 34, while the front of the welding is being polished, the hair dryer 31 on the blowing assembly also runs synchronously, the hair dryer 31 generates strong air, which is transported through the pipe 32 and finally blown out from the air outlet 34, the air outlet 34 is tilted and can blow air forward to blow away the debris and rust generated by polishing, avoid the debris and rust being left at the position of the connecting groove 2, make the connecting groove 2 cleaner, ensure the welding quality at the rear, and ensure the safety of the FPSO hull in deep sea navigation.

[0026] An automatic welding method for a transverse butt weld of an FPSO hull, the method comprising: Step 1: During the welding of the hull, the mobile bottom plate 3 of the welding equipment 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 height adjustment component provided can adjust the height of the crossbar welding head 14 according to the height of the weld, and has strong adaptability. After adjustment, the weld can be welded; Step 2: During welding, the mobile base plate 3 is moved by the equipment to realize mobile welding operation. The rust on the connecting groove 2 can be polished by the polishing disc 25 on the polishing assembly, so that the welded part is smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welded part, which affects the welding quality. Step 3: The blower assembly is set up, and the blower 31 generates strong blowing air, 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 the debris and rust being left at the position of the connection groove 2, making the connection groove 2 cleaner and ensuring the welding quality at the rear; Step 4: During the welding process, a groove limiting assembly is provided, and two sets of groove limiting rollers 17 on the groove limiting assembly are respectively located at two sides of the welding head 14 to achieve guidance and limiting, so that the welding head 14 can always be aligned with the weld position, thereby ensuring the accuracy of the weld welding; Step 5: Set up a contact adaptive adjustment component. 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. Through the push of the extrusion 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.

[0027] During use: During the process of welding the hull, the mobile bottom plate 3 of the welding equipment 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 height adjustment component of the lifting height adjustment component is set to adjust the height of the crossbar welding head 14, which has strong adaptability. After the adjustment, the weld can be welded. During welding, the mobile bottom plate 3 of the equipment is moved to realize mobile welding operations. During the welding process, the grinding component is started to grind the rust at the connecting groove 2, making the welded part smoother and flatter, which is beneficial to the stability after welding, avoiding rust on the welded part and affecting the welding quality problem, and ensuring the stability of the FPSO ship. The safety of the ship's deep-sea voyage is ensured by starting the blowing assembly while welding. The hair dryer 31 generates strong air that blows out from the air outlet 34 to blow away the debris and rust produced by grinding, making the connecting groove 2 cleaner. The groove limiting assembly is set, and the welding head 14 can always be aligned with the weld position through the guidance and limitation of the two sets of groove limiting rollers 17 before and after moving, thereby ensuring the accuracy of the weld welding. The contact adaptive adjustment assembly is set, and during the welding process, the two contact rollers 21 can always be in contact with the surface of the hull steel plate 1. Through the push of the extrusion 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 accurate.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for FPSO hull transverse butt welds, comprising a hull steel plate (1) and an equipment movable bottom plate (3), characterized in that: The hull steel plates (1) are provided with two pieces, and the sides of the two hull steel plates (1) close to each other are provided with connecting grooves (2). A fixed column (7) is installed on the movable bottom plate (3) of the equipment 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 movable 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 movable rod (11). A welding head (14) is provided on one side of the T-shaped connecting block (13). A groove 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 movable 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 for cleaning the steel plate before welding.

2. The automatic welding device for FPSO hull transverse butt weld according to claim 1, characterized in that: The lifting height adjustment assembly comprises 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 a fixed column (7) is fixedly mounted on the top of the top mounting plate (5); and a plurality of telescopic cylinders (6) are arranged between the top mounting plate (5) and the equipment moving base plate (3).

3. The automatic welding device for FPSO hull transverse butt weld according to claim 1, characterized in that: The groove limiting assembly comprises two mounting blocks (15) fixedly mounted on the sides of the T-shaped connecting block (13), the top and bottom of the mounting blocks (15) are both fixedly mounted with side brackets (16), the two side brackets (16) are both rotatably mounted with groove limiting rollers (17), and the two groove limiting rollers (17) are respectively in contact with the two connecting grooves (2).

4. The automatic welding device for FPSO hull transverse butt weld according to claim 3, characterized in that: The groove limiting rollers (17) on the two mounting blocks (15) are located on both sides of the welding head (14).

5. The automatic welding device for FPSO hull transverse butt weld according to claim 1, characterized in that: The grinding assembly comprises two equipment blocks (23) fixedly mounted on the side support rods (22), the ends of the equipment blocks (23) are rotatably mounted with grinding motors (24), the output ends of the two grinding motors (24) are fixedly mounted with grinding discs (25), the grooves of the two grinding discs (25) are symmetrically arranged and respectively matched with the two connecting grooves (2).

6. The automatic welding device for FPSO hull transverse butt weld according to claim 5, characterized in that: A fixing block (26) is fixedly mounted on the equipment block (23), a threaded adjusting column (27) is threadedly mounted on the fixing block (26), an end block (28) is rotatably mounted 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 sliding sleeve (30) is fixedly mounted on the side of the end block (28), and the limiting sliding sleeve (30) is slidably sleeved on the equipment block (23).

7. The automatic welding device for FPSO hull transverse butt weld according to claim 1, characterized in that: The blowing assembly comprises a blower (31) fixedly mounted on the top of the transverse rod (8), one side of the blower (31) being connected to a pipe (32), one side of the side support rod (22) being fixedly mounted with a mounting rod (33), one side of the mounting rod (33) being mounted with an air outlet (34), and one end of the pipe (32) being connected to the air outlet (34).

8. The automatic welding device for FPSO hull transverse butt weld according to claim 1, characterized in that: The contact adaptive adjustment component comprises a connecting bracket (18) fixedly mounted at the bottom of the moving rod (11), a mounting frame (19) fixedly mounted on one side of the connecting bracket (18), a plate magnetic block (20) fixedly mounted on the side wall of the mounting frame (19), and two contact rollers (21) rotatably mounted on the mounting frame (19), the two contact rollers (21) being in contact with the side of the hull steel plate (1).

9. The automatic welding device for FPSO hull transverse butt weld according to claim 8, characterized in that: A moving groove (10) is formed at one end of the transverse rod (8), one end of the moving rod (11) extends into the moving groove (10), and a compression spring (12) is fixedly installed between the moving rod (11) and the inner wall of the moving groove (10).

10. An automatic welding method for FPSO hull transverse butt weld according to any one of claims 1 to 9, the method comprising: Step 1: During the process of welding the hull, the mobile bottom plate (3) of the welding equipment 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 height adjustment component provided can adjust the height of the crossbar welding head (14) according to the height of the weld, and has strong adaptability. After the adjustment, the weld can be welded; Step 2: During welding, the mobile base plate (3) is moved by the device to realize mobile welding operation. The rust on the connecting groove (2) can be polished by the polishing disc (25) on the polishing assembly, so that the welded part is smoother and flatter, which is beneficial to the stability after welding and avoids rust on the welded part, which affects the welding quality. Step 3: A blower assembly is provided, wherein the blower (31) generates strong blows, which are transported through the pipe (32) and finally blown out from the air outlet (34) to blow away the debris and rust generated by grinding, thereby preventing the debris and rust from being left at the position of the connecting groove (2), making the connecting groove (2) cleaner and ensuring the quality of subsequent welding; Step 4: During the welding process, a groove limiting assembly is provided, and two sets of groove limiting rollers (17) on the groove limiting assembly are respectively located at two sides of the welding head (14) to achieve guidance and limiting, so that the welding head (14) can always be aligned with the weld position, thereby ensuring the accuracy of the weld welding; Step 5: A contact adaptive adjustment component is set up. 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). Through the push of the extrusion spring (12), adaptive movement adjustment can be achieved, so that the welding head (14) is always located on one side of the weld, and the welding is more accurate.

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