A cylindrical welded structure and its welding process

Abstract

This invention belongs to the field of cylindrical structure welding technology, and discloses a cylindrical welded structure and its welding process. The cylindrical welded structure includes a cylinder (1), an inner T-beam web (2), an inner T-beam panel (3), stiffening ribs (4), and a support pipe (5). The cylinder (1) is perpendicularly connected to the inner T-beam web (2), and the inner T-beam web (2) is perpendicularly connected to the inner T-beam panel (3). The stiffening ribs (4) are perpendicularly connected to the cylinder (1), the inner T-beam web (2), and the inner T-beam panel (3) respectively. The support pipe (5) is interconnected with the inner T-beam web (2) and the inner T-beam panel (3). This invention has a simple and reasonable structure, a convenient welding method, small welding deformation and welding stress, and high structural precision.

Description

Technical Field

[0001] This invention belongs to the field of cylindrical structure welding technology, specifically relating to a cylindrical welding structure and its welding process. Background Technology

[0002] Cylindrical welded structures are prevalent in the shipbuilding and marine engineering industry, frequently used in crane booms, crane bases, platform legs, and other similar structures. These cylindrical structures are critical and serve as primary load-bearing components. However, they are typically constructed using thick-plate welding, resulting in a large workload, significant welding deformation, and relatively low structural precision.

[0003] CN114669955A discloses a method for preventing welding deformation of tube sheet structures. The method involves assembling cylindrical components before welding. It performs a pre-deformation process on the assembled cylindrical components, then welds temporary tie rods onto the pre-deformed cylindrical components, and finally removes the temporary tie rods from the cylindrical components using dismantling equipment. The welding operation requires both welding and removing the temporary tie rods, making the welding process quite complex.

[0004] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a cylindrical welded structure with a simple and reasonable structure, a simple welding method, and low welding deformation and welding stress, as well as its welding process.

[0006] To solve the above technical problems, the present invention provides a cylindrical welded structure, including a cylinder body, an inner T-beam web, an inner T-beam face plate, stiffening ribs, and a support pipe. The cylinder body is perpendicularly connected to the inner T-beam web, the inner T-beam web is perpendicularly connected to the inner T-beam face plate, the stiffening ribs are perpendicularly connected to the cylinder body, the inner T-beam web, and the inner T-beam face plate respectively, and the support pipe is interconnected with the inner T-beam web and the inner T-beam face plate.

[0007] Furthermore, the web of the T-beam inside the tube is arc-shaped.

[0008] Furthermore, the number of stiffeners is four, evenly arranged circumferentially.

[0009] Furthermore, the length of the stiffening plate is consistent with the length of the cylinder.

[0010] Furthermore, the support tube is installed on the top surface of the stiffening plate.

[0011] The welding process for cylindrical welded structures includes the following steps:

[0012] First, weld the circumferential weld between the cylinder body and the web of the T-beam inside the cylinder. Weld symmetrically in four sections simultaneously to control welding deformation.

[0013] 2. The longitudinal long welds between the welding stiffeners and the cylinder are welded symmetrically in sections from the middle to both sides.

[0014] III. Weld joint connecting the stiffening plate and the web of the T-beam inside the tube;

[0015] 4. The circumferential weld between the web of the T-beam inside the tube and the panel of the T-beam inside the tube shall be welded symmetrically in four sections simultaneously to control welding deformation.

[0016] V. Weld joints connecting the stiffening ribs to the T-beam panels inside the cylinder;

[0017] VI. The weld connecting the welded support pipe to the web of the T-beam inside the cylinder shall be welded symmetrically on both sides simultaneously.

[0018] 7. Finally, weld the connection between the support pipe and the T-beam panel inside the cylinder.

[0019] Furthermore, the cylinder body, the web of the T-beam inside the cylinder, the face plate of the T-beam inside the cylinder, and the stiffening plate are all made of steel plate with a thickness of less than or equal to 80mm.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. In this invention, the web of the T-beam inside the cylinder is perpendicularly connected to the cylinder body and the T-beam panel inside the cylinder, the stiffening plate is perpendicularly connected to the cylinder body, the web of the T-beam inside the cylinder, and the T-beam panel inside the cylinder, and the support pipe is connected to the web of the T-beam inside the cylinder and the T-beam panel inside the cylinder to form a cylindrical welded structure. The structure is simple and reasonable and easy to manufacture.

[0022] 2. The welding of this invention follows the sequence of cylinder body to T-beam web, stiffening plate to cylinder body, stiffening plate to T-beam web, T-beam web to T-beam face plate, stiffening plate to T-beam face plate, support pipe to T-beam web, and support pipe to T-beam face plate. The welding method is simple, with small welding deformation and welding stress, good welding quality, and high structural precision.

[0023] 3. When welding the circumferential weld between the web of the T-beam inside the cylinder and the panel of the T-beam inside the cylinder, the present invention performs symmetrical welding in four sections simultaneously, effectively controlling welding deformation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the web structure of the T-beam inside the tube of the present invention.

[0026] Figure 3 This is a schematic diagram of the stiffener structure of the present invention.

[0027] Figure 4 This is a schematic diagram of the welding sequence of the present invention.

[0028] In the diagram, 1 is the cylinder body, 2 is the web of the T-beam inside the cylinder, 3 is the panel of the T-beam inside the cylinder, 4 is the stiffening plate, and 5 is the support pipe. Implementation

[0029] like Figure 1 As shown, a cylindrical welded structure includes a cylinder 1, an internal T-beam web 2, an internal T-beam face plate 3, stiffening ribs 4, and a support pipe 5. The cylinder 1 is perpendicularly connected to the internal T-beam web 2, and the internal T-beam web 2 is perpendicularly connected to the internal T-beam face plate 3. The stiffening ribs 4 are perpendicularly connected to the cylinder 1, the internal T-beam web 2, and the internal T-beam face plate 3, respectively. The support pipe 5 is interconnected with the internal T-beam web 2 and the internal T-beam face plate 3. In this application, the internal T-beam web 2 is perpendicularly connected to the cylinder 1 and the internal T-beam face plate 3, the stiffening ribs 4 are perpendicularly connected to the cylinder 1, the internal T-beam web 2, and the internal T-beam face plate 3, and the support pipe 5 is interconnected with the internal T-beam web 2 and the internal T-beam face plate 3, forming a cylindrical welded structure. This structure is simple, reasonable, and easy to manufacture.

[0030] like Figure 2 As shown, the web 2 of the T-beam inside the cylinder is arc-shaped. Figure 3 As shown, there are four stiffening plates 4, evenly arranged circumferentially, and the length of the stiffening plates 4 is consistent with the length of the cylinder 1. The support pipe 5 is set on the top surface of the stiffening plates 4.

[0031] The steel used in the cylindrical welded structure of this application has a yield strength of 355MPa or higher, and the maximum thickness of the steel plate is 80mm. The cylindrical body 1, the web plate of the T-beam inside the cylinder 2, the panel plate of the T-beam inside the cylinder 3, and the stiffening plate 4 are all made of steel plate.

[0032] like Figure 4 As shown, the welding process steps for this cylindrical welded structure are as follows:

[0033] ① First, weld the circumferential weld between the cylinder 1 and the web plate 2 of the T-beam inside the cylinder. Weld symmetrically in four sections at the same time to control welding deformation.

[0034] ② The longitudinal long weld between the welding stiffener 4 and the cylinder 1 shall be welded symmetrically in sections from the middle to both sides;

[0035] ③ The weld connecting the stiffening plate 4 and the web plate 2 of the T-beam inside the tube;

[0036] ④ The circumferential weld between the web plate 2 of the T-beam inside the tube and the panel 3 of the T-beam inside the tube is welded symmetrically in four sections simultaneously to effectively control welding deformation.

[0037] ⑤ The weld connecting the welding stiffener plate 4 and the T-beam panel 3 inside the cylinder;

[0038] ⑥ The weld connecting the welded support pipe 5 and the web plate 2 of the T-beam inside the cylinder shall be welded symmetrically on both sides simultaneously.

[0039] ⑦ Finally, weld the connection between the support pipe 5 and the T-beam panel 3 inside the cylinder.

[0040] The welding in this application follows the sequence of cylinder 1 to the web plate 2 of the T-beam inside the cylinder, stiffening plate 4 to cylinder 1, stiffening plate 4 to the web plate 2 of the T-beam inside the cylinder, web plate 2 of the T-beam inside the cylinder to the panel 3 of the T-beam inside the cylinder, stiffening plate 4 to the panel 3 of the T-beam inside the cylinder, support pipe 5 to the web plate 2 of the T-beam inside the cylinder, and support pipe 5 to the panel 3 of the T-beam inside the cylinder. This specific welding sequence is used for welding construction, which is simple and easy to manufacture. It has good rigidity and strength, good welding quality, small welding deformation and welding stress, and high structural accuracy, and can be used as an important load-bearing structure.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding process for a cylindrical welded structure, characterized in that: The cylindrical welded structure includes a cylinder (1), an inner T-beam web (2), an inner T-beam panel (3), stiffening plates (4), and a support pipe (5). The cylinder (1) is perpendicularly connected to the inner T-beam web (2), the inner T-beam web (2) is perpendicularly connected to the inner T-beam panel (3), the stiffening plates (4) are perpendicularly connected to the cylinder (1), the inner T-beam web (2), and the inner T-beam panel (3), respectively, and the support pipe (5) is interconnected with the inner T-beam web (2) and the inner T-beam panel (3). The web (2) of the T-beam inside the tube is arc-shaped; the support tube (5) is set on the top surface of the stiffening plate (4); The welding process includes the following steps: First, weld the circumferential weld between the cylinder (1) and the web plate (2) of the T-beam inside the cylinder, and weld symmetrically in four sections at the same time.

2. The longitudinal long weld between the welding stiffener (4) and the cylinder (1) is symmetrically welded from the middle to both sides; 3. Weld joint connecting the stiffening plate (4) and the web plate (2) of the T-beam inside the tube; 4. The circumferential welds between the web plate (2) of the T-beam inside the tube and the panel plate (3) of the T-beam inside the tube are welded symmetrically in four sections at the same time. V. Welding joint between the welding stiffener plate (4) and the T-beam panel (3) inside the cylinder; VI. The weld connecting the support pipe (5) and the web plate (2) of the T-beam inside the cylinder shall be symmetrically welded on both sides simultaneously. VII. Finally, weld the connection between the support pipe (5) and the T-beam panel (3) inside the cylinder.

2. The welding process for the cylindrical welded structure according to claim 1, characterized in that: The number of stiffeners (4) is 4, and they are evenly arranged in the circumference.

3. The welding process for the cylindrical welded structure according to claim 2, characterized in that: The length of the stiffener (4) is consistent with the length of the cylinder (1).

4. The welding process for the cylindrical welded structure according to claim 1, characterized in that, The cylinder body (1), the web of the T-beam inside the cylinder (2), the panel of the T-beam inside the cylinder (3), and the stiffening plate (4) are all made of steel plates with a thickness of less than or equal to 80mm.

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