Offshore wind power single pile welding device

Abstract

The utility model discloses an offshore wind power single pile welding device, including welding steel frame and support frame, welding steel frame sets up in the one end of big diameter cylinder subassembly that constitutes single pile in linear arrangement, and support frame sets up in the other end of big diameter cylinder subassembly that constitutes single pile in linear arrangement, one end of first ground wire is connected to the ground terminal of welding, and the other end of first ground wire is connected to welding steel frame, one end of second ground wire rotatablely connects on welding steel frame, and the other end of second ground wire is detachably connected to big diameter cylinder subassembly, steel wire rope subassembly is worn in big diameter cylinder subassembly and is connected respectively on welding steel frame and support frame in two ends of steel wire rope subassembly, and first ground wire cable and other cable on welding machine can be erected on steel wire rope subassembly. In the utility model, first ground wire is connected through connecting welding steel frame, and the mode of welding steel frame connecting cylinder body connects to realize welding while avoiding first ground wire winding.

Description

Technical Field

[0001] This utility model belongs to the field of offshore wind power generation technology, and specifically relates to an offshore wind power monopile welding device. Background Technology

[0002] Monopile foundations are an important component of offshore wind power systems. Currently, in the implementation of offshore wind power monopile projects, the outer diameter of the monopile is between 8 and 11.5 meters. The monopile is formed by welding curved steel plates to form a large-diameter cylindrical section, and the large-diameter cylindrical sections are then spliced ​​and welded together to form the monopile.

[0003] The grounding wire is a key component of the welding circuit. It needs to form a closed loop with the workpiece and the negative electrode (or a specific polarity terminal) of the welding machine. Only when the loop is complete can the current stably pass through the contact surface between the welding rod / wire and the workpiece, forming a continuous and uniform electric arc, thus avoiding quality defects such as unstable electric arc, slag inclusions in the weld, and lack of fusion caused by poor loop contact.

[0004] During the welding process of splicing large-diameter cylinders into monopiles, due to the large diameter of the cylinders and the curved surface of the workpiece (cylinder), completing the full-circle welding between cylinder sections requires simultaneously rotating both spliced ​​cylinder sections to bring the parts to be welded to their lowest positions. At this point, the welder enters the cylinder to complete the welding at the joint. During the welding process, one end of the grounding wire needs to be connected to the cylinder to ensure the welding circuit is in normal working order. However, during the welding between cylinder sections, the cylinder sections (workpieces) need to rotate. This rotation causes the grounding wire to become wrapped around the cylinder section, increasing its length and generating a back electromotive force. Utility Model Content

[0005] The purpose of this invention is to provide a welding device for offshore wind turbine monopiles, thereby overcoming the problem of the grounding wire getting wrapped around the cylinder section during the monopile welding process. The specific technical solution is as follows: A welding device for offshore wind turbine monopile, comprising: A welded steel frame and a support frame are provided, wherein the welded steel frame is disposed at one end of the large-diameter cylindrical assembly constituting the monopile in a linear arrangement, and the support frame is disposed at the other end of the large-diameter cylindrical assembly constituting the monopile in a linear arrangement. A first grounding wire, one end of which is connected to a welded grounding terminal, and the other end of which is connected to the welded steel frame; A second grounding wire, one end of which is rotatably connected to the welded steel frame, and the other end of which is detachably connected to the large-diameter cylindrical assembly; A wire rope assembly, wherein the wire rope assembly is inserted inside the large-diameter cylindrical assembly and both ends of the wire rope assembly are respectively connected to the welded steel frame and the support frame; The first grounding cable and other cables on the welding machine can be laid on the wire rope assembly.

[0006] Preferably, the wire rope assembly includes wire ropes, and a connecting member is provided between two adjacent wire ropes. The first end of the wire rope is bent and passed through the connecting member and extends out of the connecting member toward the second end of the wire rope opposite to the first end of the wire rope. A fixing component is provided at the second end of the wire rope, the fixing component being used to fix the portion of the wire rope extending from the connecting component to the portion of the wire rope not inserted into the connecting component.

[0007] Preferably, the connecting component includes a first connector and a second connector. The first connector has a first workpiece groove on its pressing surface, and the second connector has a second workpiece groove on its pressing surface. The pressing surfaces of the first connector and the second connector are in contact with each other and pressed together. The first workpiece groove and the second workpiece groove form a fixing hole for restricting the wire rope. The first connector and the second connector are fixedly connected by clamping bolts.

[0008] Preferably, both the first connector and the second connector include two ends and a snap-fit ​​portion located between the two ends; The first workpiece groove and the second workpiece groove are disposed on the end head, and the end head is provided with a first threaded hole, and the clamping bolt is connected in the first threaded hole.

[0009] Preferably, the first connector has a groove on its snap-fit ​​portion, and the second connector has a protrusion on its snap-fit ​​portion, the protrusion being embedded in the groove; The first connector and the second connector are provided with a second threaded hole on the snap-fit ​​portion, and a connecting bolt is connected in the second threaded hole.

[0010] Preferably, the fixing component includes two fixing members, each fixing member including a main block, a fixing post connected to the end of the main block, and a threaded section provided on the fixing post; A fixing groove is provided on the surface of the main body block where the fixing post is located. An avoidance cavity is formed on the side of the main body block away from the fixing groove, and a threaded hole is provided on the avoidance cavity.

[0011] Compared with existing technologies, this utility model has the following beneficial effects: 1. In the welding device of this utility model, the first grounding wire is connected to the large-diameter cylindrical assembly through the welding steel frame and the second grounding wire. The first grounding wire connected from the grounding terminal of the welding machine does not need to be directly connected to the large-diameter cylindrical assembly. At the same time, the first grounding wire passes through the center of the large-diameter cylindrical assembly. When the large-diameter cylindrical assembly rotates, the first grounding wire will not be wrapped around the cylindrical section, reducing the length of the first grounding wire and avoiding the formation of back electromotive force.

[0012] 2. In the welding device of this utility model, the wire rope assembly can support the wires and air pipes connected to the welding machine, thus avoiding the problem of tangling and improving construction efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic diagram of the welding device provided by this utility model; Figure 2 This is the schematic diagram of the welding circuit of the welding device provided by this utility model; Figure 3 This is a structural schematic diagram of the wire rope assembly provided by this utility model; Figure 4 This is a structural schematic diagram of the wire rope assembly provided by this utility model. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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 utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0019] See Figure 1 and Figure 2 A welding device for offshore wind turbine monopile includes a welding steel frame 1 and a support frame 2. The welding steel frame 1 is disposed at one end of a large-diameter cylindrical assembly 3 arranged linearly to form the monopile, and the support frame 2 is disposed at the other end of the large-diameter cylindrical assembly 3 arranged linearly to form the monopile. A first grounding wire 4 is provided, with one end connected to a welded grounding terminal and the other end connected to the welding steel frame 1. A second grounding wire 5 is provided, with one end rotatably connected to the welding steel frame 1 and the other end detachably connected to the large-diameter cylindrical assembly 3. A wire rope assembly 6 is provided, which passes through the large-diameter cylindrical assembly 3 and has both ends connected to the welding steel frame 1 and the support frame 2, respectively. The first grounding wire 4 cable and other cables on the welding machine can be mounted on the wire rope assembly 6.

[0020] During welding, each arc-shaped steel plate is welded into a short, large-diameter cylindrical section, and multiple large-diameter cylindrical sections are welded together to form a single pile.

[0021] In this process, since the cylinder section needs to be rotated, the length of the wire rope assembly 6 and the erection distance between the welding steel frame 1 and the support frame 2 are first set according to the length of the single pile, and then the welding steel frame 1 and the support frame 2 are erected.

[0022] The second grounding wire 5 is rotatably connected to the welded steel frame 1. The second grounding wire 5 has a certain length. When the cylinder rotates, the second grounding wire 5 is connected to the cylinder and can rotate with the cylinder. Since the second grounding wire 5 is rotatably connected to the welded steel frame 1, and the welded steel frame 1 is fixedly mounted at the end, the second grounding wire 5 will not affect the welded steel frame 1 when it rotates with the cylinder. Through the second grounding wire 5 and the welded steel frame 1, the first grounding wire is not directly connected to the cylinder 1.

[0023] In this system, the outer diameter of the monopile is relatively large, with a maximum diameter of 11.5m and a corresponding radius of 11.5 / 2 = 5.75m. The welded monopile is supported by a roller frame. Ideally, the welded steel frame 1 should be positioned at the center of the end face of the large-diameter cylinder. However, in the actual implementation, for operational flexibility, the welded steel frame 1 and support frame 2 cannot always be installed at the center of the cylinder's end face, and their height should be avoided from being excessively high. Since the second grounding wire 5 has a certain length, it allows for extension during cylinder rotation, preventing inconvenience caused by insufficient length when the cylinder reaches its highest point. To facilitate the actual working conditions of the second grounding wire 5, a steel wire rope of a certain length can be used.

[0024] See Figure 1 and Figure 2 When welding using the above-mentioned device, the grounding terminal of the welding machine is connected to the first grounding wire 4, the first grounding wire 4 is connected to the welding steel frame 1, and the welding steel frame 1 and the large-diameter cylindrical assembly 3 are connected through the second grounding wire 5. The positive terminal of the welding machine is connected to the welding cable, the welding cable is connected to the welding torch, and the welding torch generates an electric arc for welding the cylindrical section. This connection forms a welding circuit.

[0025] It should be noted that the welding steel frame 1, the large-diameter cylindrical assembly 3, and the second grounding wire 5 are electrically connected, enabling the first grounding wire 4 to return to the welding machine. The welding circuit path is as follows: welding machine positive electrode → welding cable → welding gun electrode / wire → arc → large-diameter cylindrical assembly → second grounding wire → welding steel frame → first grounding cable → welding machine grounding terminal → inside the welding machine → welding machine positive electrode, forming a closed circuit.

[0026] In a specific implementation, the other end of the first grounding wire 4 is connected to the welding steel frame 1 by means of pliers. The welding steel frame 1 not only forms the welding circuit but also supports the cable.

[0027] The key conductive nodes of the main welding circuit are the current inflow end of the large-diameter cylindrical component 3 and the current outflow end of the welding steel frame 1. The only conductive bridge between the two is the second grounding wire 5. The steel wire rope 61 in the other steel wire rope assembly is erected between the welding steel frame 1 and the support frame 2. The steel wire rope 61 is equipped with multiple hooks to hang the gas pipe and other necessary items during welding. For example, the welding cable between the positive terminal of the welding machine and the welding torch can be hung on the steel wire rope 61, and the first grounding wire 4 between the grounding terminal and the welding workpiece can be hung on the steel wire rope 61. The steel wire rope 61 is mainly used to support the cable.

[0028] See Figure 3 and Figure 4 The wire rope assembly 6 includes a wire rope 61, and a connecting member 62 is provided between two adjacent wire ropes 61. The first end of the wire rope 61 is bent and passed through the connecting member 62 and extends out of the connecting member 62 toward the second end of the wire rope 61 opposite to the first end of the wire rope 61.

[0029] A fixing member 63 is provided at the second end of the wire rope 61. The fixing member 63 is used to fix the portion of the wire rope 61 that extends out of the connecting member 62 to the portion of the wire rope 61 that does not pass through the connecting member 62.

[0030] During the monopile project, the hoisting process generates short steel wire ropes. To reduce costs, the welding equipment utilizes locally sourced materials, avoiding the purchase of new steel wire ropes and instead using existing short ropes from the site. However, when the length of the welded monopile is very long, the length of the steel wire rope 61 threaded inside the cylinder section also increases. Therefore, using short steel wire ropes necessitates splicing them together to form a steel wire rope 61 of sufficient length. Furthermore, to further reduce costs, in the actual implementation site, both the connecting component 62 and the fixing component 63 are made of steel plates.

[0031] See Figure 3 and Figure 4 The connecting component 62 includes a first connecting member 621 and a second connecting member 622. The first connecting member 621 has a first workpiece groove 6210 on its pressing surface, and the second connecting member 622 has a second workpiece groove 6220 on its pressing surface. The pressing surfaces of the first connecting member 621 and the second connecting member 622 are in contact with each other and pressed together. The first workpiece groove 6210 and the second workpiece groove 6220 form a fixing hole 623 that restricts the wire rope 61. The first connecting member 621 and the second connecting member 622 are fixedly connected by a clamping bolt 624.

[0032] See Figure 3 and Figure 4Both the first connector 621 and the second connector 622 include two ends 625 and a snap-fit ​​portion 626 located between the two ends 625; wherein, the first workpiece groove 6210 and the second workpiece groove 6220 are disposed on the end 625, and the end 625 is provided with a first threaded hole 6250, and the clamping bolt 624 is connected in the first threaded hole 6250.

[0033] The first connector 621 has a groove 6260 on its snap-fit ​​portion 626, and the second connector 622 has a protrusion 6261 on its snap-fit ​​portion 626, which is embedded in the groove 6260. The first connector 621 and the second connector 622 have a second threaded hole 6263 on their snap-fit ​​portions 626, and a connecting bolt 627 is connected in the second threaded hole 6263.

[0034] See Figure 3 and Figure 4 The fixing component 63 includes two fixing members 631. Each fixing member 631 includes a main body block 6311. A fixing post 6312 is connected to the end of the main body block 6311. The fixing post 6312 is provided with a threaded section 6313. A fixing groove 6314 is provided on the surface of the main body block 6311 where the fixing post 6312 is located. An avoidance cavity 6315 is formed on the side of the main body block 6311 away from the fixing post 6313. A threaded hole 6316 is provided on the avoidance cavity 6315.

[0035] In summary, in this utility model, the first grounding wire of the welding device is connected to the welding steel frame, and the welding steel frame is connected to the cylinder (workpiece) to achieve welding while avoiding the first grounding wire from getting tangled. As for the steel wire rope inside the cylinder, it can support the wires and air pipes connected to the welding machine, which also avoids the tangling problem and improves the construction efficiency.

[0036] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A welding device for offshore wind turbine monopile, characterized in that, include: Welded steel frame (1) and support frame (2), the welded steel frame (1) is disposed at one end of the large-diameter cylindrical assembly (3) that is arranged linearly to form the monopile, and the support frame (2) is disposed at the other end of the large-diameter cylindrical assembly (3) that is arranged linearly to form the monopile; The first grounding wire (4) has one end connected to the welded grounding terminal and the other end connected to the welded steel frame (1). The second grounding wire (5) has one end rotatably connected to the welded steel frame (1) and the other end detachably connected to the large-diameter cylindrical assembly (3). A wire rope assembly (6) is inserted into the large-diameter cylindrical assembly (3) and both ends of the wire rope assembly (6) are respectively connected to the welded steel frame (1) and the support frame (2); The first grounding wire (4) cable and other cables on the welding machine can be laid on the wire rope assembly (6).

2. The offshore wind turbine monopile welding device according to claim 1, characterized in that, The wire rope assembly (6) includes a wire rope (61), and a connecting member (62) is provided between two adjacent wire ropes (61). The first end of the wire rope (61) is bent and passed through the connecting member (62), and extends out of the connecting member (62) and is positioned toward the second end of the wire rope (61) opposite to the first end of the wire rope (61). A fixing member (63) is provided at the second end of the wire rope (61), the fixing member (63) being used to fix the portion of the wire rope (61) extending from the connecting member (62) to the portion of the wire rope (61) not inserted into the connecting member (62).

3. The offshore wind turbine monopile welding device according to claim 2, characterized in that, The connecting component (62) includes a first connecting member (621) and a second connecting member (622). A first workpiece groove (6210) is provided on the pressing surface of the first connecting member (621), and a second workpiece groove (6220) is provided on the pressing surface of the second connecting member (622). The pressing surfaces of the first connecting member (621) and the second connecting member (622) are in contact with each other and pressed together. The first workpiece groove (6210) and the second workpiece groove (6220) form a fixing hole (623) for restricting the wire rope (61). The first connector (621) and the second connector (622) are fixedly connected by a clamping bolt (624).

4. The offshore wind turbine monopile welding device according to claim 3, characterized in that, Both the first connector (621) and the second connector (622) include two ends (625) and a snap-fit ​​portion (626) located between the two ends (625). The first workpiece groove (6210) and the second workpiece groove (6220) are disposed on the end (625), and the end (625) is provided with a first threaded hole (6250), and the clamping bolt (624) is connected in the first threaded hole (6250).

5. The offshore wind turbine monopile welding device according to claim 4, characterized in that, The first connector (621) has a groove (6260) on its snap-fit ​​portion (626), and the second connector (622) has a protrusion (6261) on its snap-fit ​​portion (626), the protrusion (6261) being embedded in the groove (6260); The first connector (621) and the second connector (622) are provided with a second threaded hole (6263) on the snap-fit ​​portion (626), and a connecting bolt (627) is connected in the second threaded hole (6263).

6. The offshore wind turbine monopile welding device according to claim 2, characterized in that, The fixing component (63) includes two fixing members (631), each fixing member (631) including a main body block (6311), a fixing post (6312) connected to the end of the main body block (6311), and a threaded section (6313) provided on the fixing post (6312). A fixing groove (6314) is provided on the surface of the main body block (6311) where the fixing post (6312) is located. An avoidance cavity (6315) is formed on the side of the main body block (6311) away from the fixing post (6312). A threaded hole (6316) is provided on the avoidance cavity (6315).

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