Splicing type load transfer frame for offshore converter station land debugging and application

Abstract

The invention provides a spliced load transfer frame for land debugging of an offshore converter station and application. The spliced load transfer frame for land debugging of the offshore converter station comprises main supporting beams, transverse connecting beams and transverse supporting beams. The transverse supporting beams and the transverse connecting beams jointly form secondary supporting beams. Fire welding is not needed on the land debugging site of the offshore converter station, damage to equipment caused by fire operation is avoided, and the on-site assembling and disassembling process is simple; meanwhile, the bulk components are light in weight, medium-large hoisting equipment is not needed when the bulk components are transported from the land to the position above a high-rise platform, the overall construction process cost is lower, and an efficient and reliable solution is provided for arrangement of temporary equipment during land debugging of the offshore converter station; during assembly, the load transfer frame has the advantages that the number of the transverse connecting beams, the number of the main supporting beams and the number of the transverse supporting beams can be adjusted / increased according to existing platform main and secondary beam structures, special design and machining are not needed, and the application range is wide.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore wind power, and in particular relates to a spliced ​​load transfer frame for land commissioning of an offshore converter station and its application. Background Art

[0002] In recent years, the planning of offshore wind farms has tended to be large-capacity and long-distance. As the core of wind farms, offshore booster stations will gradually be replaced by offshore converter stations. The most obvious difference between offshore converter stations and offshore booster stations is that they are large in size and have more equipment. The weight index of the entire station directly affects the dock load, slip loading, transportation and floating installation. It is very sensitive to the overall cost control. When the weight is too large, it will even have a subversive impact on each process stage, making the design of offshore converter stations must be compact and lightweight. In addition to the complex and difficult design and construction itself, the transformers and GIS and other equipment in the offshore converter station have higher isobaric levels, larger capacities, and more quantities. Compared with offshore booster stations, larger oil tanks and more equipment are required during land debugging, such as test transformers, control cabinets, reactors, etc. Land debugging has also become a key path and difficulty in the construction process. Specifically:

[0003] (1) The construction period of the offshore converter station on land is tight, and the equipment installation and the construction and loading of each layer structure are usually carried out in parallel. For example, for the transformer located on the fifth floor (the fifth and sixth floors are of the same height), its equipment installation needs to be completed before the seventh deck is capped. At the same time, since the debugging equipment is large in size, if the debugging is carried out after the roof is completed, it will be difficult for the debugging equipment to enter the transformer layer, resulting in a height difference between the debugging equipment and the transformer / GIS equipment, making it difficult to connect and take over during the test. The large height difference may even affect the test itself.

[0004] (2) The equipment and devices used for debugging are only used during the debugging period on land and are not permanent loads. Under the premise of compactness, it is difficult for the rooms in the offshore converter station to accommodate a large number of heavy debugging equipment. If an additional test platform is added for such equipment, it is also necessary to consider the dismantling work after debugging, which has high construction costs and a long construction period; if a room without equipment nearby, such as a spare parts room, is used to arrange the equipment and devices used for debugging, it is necessary to strengthen the structural beams or adjust the beam system, which will increase permanent steel components. In addition, the actual situation is usually that the selection, plan and layout of the debugging equipment are later than the design of the structure or even later than the on-site manufacturing, which makes it difficult to modify the on-site beam system and difficult to match the layout of the debugging equipment.

[0005] In order to resolve the above two contradictions, it is urgent to develop a load transfer frame for land commissioning of offshore converter stations to solve the contradiction between the inability to modify the beam system and the layout of the debugging equipment; at the same time, optimize the production process of the load transfer frame as much as possible, reduce hot work, improve reusability, speed up the debugging cycle, and provide solutions for the land construction and commissioning of offshore converter stations. Summary of the invention

[0006] The first purpose of the present invention is to propose a method for assembling a load transfer frame through several types of prefabricated components according to needs to greatly improve material utilization and on-site construction efficiency, simplify the process flow, and ensure reliable connection between parts, in order to address the problems of large number of temporary equipment / devices required for land commissioning of offshore converter stations, heavy weight, difficult layout, and short commissioning window. Without changing the original platform structure design, the present invention proposes a method for assembling a load transfer frame through several types of prefabricated components according to needs, thereby greatly improving material utilization and on-site construction efficiency, simplifying the process flow, and ensuring reliable connection between parts.

[0007] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0008] A spliced ​​load transfer frame for land commissioning of an offshore converter station, comprising a main support beam, a transverse connecting beam and a transverse support beam;

[0009] The main support beam comprises a square steel, a sealing plate for sealing both ends of the square steel, and a connecting piece arranged on the sealing plate, wherein the connecting piece is used to connect two adjacent main support beams; a plurality of connecting ports are arranged on the side of the square steel, wherein the connecting ports are used to connect the transverse connecting beam and the transverse support beam;

[0010] The transverse support beam and the transverse connecting beam together constitute a secondary support beam;

[0011] The transverse support beam comprises a square steel, a sealing plate for sealing both ends of the square steel, a latch and a connecting piece, wherein the connecting piece is used to connect two adjacent transverse support beams or to connect a transverse support beam and a transverse connecting beam;

[0012] The transverse connecting beam includes square steel, a sealing plate for sealing both ends of the square steel, and at least one self-locking device; the self-locking device is arranged on the sealing plate at the end of the square steel, and the self-locking device on the transverse connecting beam cooperates with the latch part on the transverse supporting beam in the connecting port of the main supporting beam.

[0013] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0014] As a preferred technical solution of the present invention: the connecting parts at both ends of the main support beam include a first connecting part and a second connecting part, the first connecting part and the second connecting part each include three connecting plates, the three connecting plates of the first connecting part of the first main support beam in adjacent main support beams are staggered with the three connecting plates of the second connecting part of the second main support beam so that the two are cross-closed and locked by bolts.

[0015] As a preferred technical solution of the present invention: a graphene coating is sprayed on the outer surface of the connecting plate.

[0016] As a preferred technical solution of the present invention: the latch member is provided with a first opening reinforcement member, a second opening reinforcement member and a cast steel lock;

[0017] The cast steel lock is arranged on the outer end of the latch member, the first perforated reinforcement member is arranged close to the sealing plate of the transverse support beam, and the second perforated reinforcement member is between the cast steel lock and the first perforated reinforcement member and is arranged close to the cast steel lock.

[0018] As a preferred technical solution of the present invention: the top of the cast steel lock has an arc surface.

[0019] As a preferred technical solution of the present invention: the width of the second perforated reinforcement member is greater than the width of the first perforated reinforcement member.

[0020] As a preferred technical solution of the present invention: the self-locking device includes a bottom plate, a rotating shaft, a locking plate, a locking buckle, a spring, and a button block;

[0021] A rotating shaft is provided above the bottom plate, and the rotating shaft is passed through the side wall of the transverse connecting beam, and the extending direction of the rotating shaft is perpendicular to the insertion direction of the latch member. The locking plate is passed through the rotating shaft, and the locking plate is provided with a lock at the end facing the latch member, and the locking plate is provided with a plurality of springs at the end away from the latch member, and the two ends of the springs are respectively fixed to the latch member and the bottom plate; a button block is provided on the upper surface of the locking plate, and the button block is located at the end of the locking plate provided with the spring, and a button hole is provided at a position corresponding to the button block on the transverse connecting beam.

[0022] As a preferred technical solution of the present invention: the self-locking device is also provided with a limit plate, the limit plate is arranged on the bottom plate, and the limit plate is located between the lock buckle and the spring to space the latch and the spring.

[0023] As a preferred technical solution of the present invention: the end surface of the lock catch and the latch member that cooperates with each other is an arc surface.

[0024] The present invention also provides the application of the above-mentioned spliced ​​load transfer frame for land commissioning of an offshore converter station on an offshore converter station platform.

[0025] The present invention provides a spliced ​​load transfer frame for land commissioning of an offshore converter station and its application, specifically, having the following

[0026] Beneficial effects:

[0027] 1) The present invention provides a spliced ​​load transfer frame, which does not require hot welding at the land commissioning site of the offshore converter station, thus avoiding damage to the equipment caused by hot work, and the on-site assembly and disassembly process is simple; at the same time, the bulk components are light in weight, and there is no need to use medium or large lifting equipment to transport them from land to the top of the high-rise platform. The overall construction process cost is lower, providing an efficient and reliable solution for the layout of temporary equipment during the land commissioning of the offshore converter station.

[0028] 2) During assembly, the advantage of the load transfer frame is that the number of transverse connecting beams, main support beams and transverse support beams can be adjusted / increased according to the existing platform main and secondary beam structure, without the need for special design and processing, and has a wide range of applications.

[0029] 3) The latch parts and self-locking devices in the spliced ​​load transfer frame can effectively ensure the connection reliability of each component. The arc surface and rotating mechanism contact of the proposed cast steel lock and lock buckle only require pushing the components to complete the locking installation, and the on-site operation efficiency is high. At the same time, the latch parts are provided with connection reinforcement members (that is, the first opening reinforcement member and the second opening reinforcement member) to further ensure the shear strength of the main support beam.

[0030] 4) Setting a limit plate in the self-locking device can prevent construction workers from operating it incorrectly and prevent the latch from entering the spring assembly side behind the lock plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of the spliced ​​load transfer frame provided by the present invention.

[0032] Figure 2 A three-dimensional diagram of the main supporting beam.

[0033] Figure 3a A perspective view of the transverse support beam.

[0034] Figure 3b It is a three-dimensional view of the latch member on the transverse support beam.

[0035] Figure 4a This is a three-dimensional diagram of the transverse connecting beam.

[0036] Figure 4b It is a three-dimensional diagram of the self-locking device on the transverse connecting beam.

[0037] Figure 5 The figure shows the splicing process of the connecting parts.

[0038] Figure 6 The figure shows the connection process of the latch and the self-locking device.

[0039] Figure 7 This is a diagram showing the application of the spliced ​​load transfer frame provided by the present invention on a platform.

[0040] In the above figure: 1-main support beam; 11-square steel; 12-covering plate; 13-connecting piece; 131-bolt hole; 132-graphene coating; 14-connecting port; 15-long bolt;

[0041] 2- transverse support beam; 21- sealing plate; 22- latch member; 220- latch body; 221- first opening reinforcement member; 222- second opening reinforcement member; 223- cast steel lock;

[0042] 3- transverse connecting beam; 31- self-locking device; 311- bottom plate; 312- rotating shaft; 313- locking plate; 314- locking; 315- spring; 316- button block; 317- button hole; 318- limiting plate; 32- free combination end;

[0043] 4-Platform structural beam. DETAILED DESCRIPTION

[0044] A spliced ​​load transfer frame for land commissioning of an offshore converter station is mainly composed of three types of prefabricated components, namely a main support beam, a transverse connecting beam and a transverse support beam.

[0045] The main support beam is composed of square steel, sealing plates and connectors. Three connection ports are opened in the middle of the square steel for connecting the transverse connecting beam and the transverse support beam. On the one hand, the three connection ports can set up several groups of connections according to the weight of the debugging equipment to strengthen the strength of the load transfer frame. On the other hand, they also have the possibility of corresponding adjustment according to the secondary beam of the platform structure and the equipment foundation. The two ends of the square steel are closed with sealing plates, and three connectors are welded on the sealing plates. The spacing between the connectors is equivalent to the thickness of the connectors. When the main support beam is turned over, the connectors on the two sections of the main support beam can cross into the spacing to form a closed connection section. The connector is a carbon steel casting with three bolt holes reserved in the middle. The outer surface of the connector is sprayed with graphene coating to reduce the friction of different connectors and increase the wear resistance.

[0046] The transverse connecting beam and the transverse supporting beam together constitute a secondary supporting beam. The transverse connecting beam is arranged between two sections of the main supporting beam. The transverse supporting beam is arranged outside the two sections of the main supporting beam and is connected through the main supporting beam connecting port.

[0047] The transverse support beam is composed of square steel, a sealing plate, a latch and a connecting piece. Similar to the main support beam, the two ends are closed with sealing plates. A latch is set at one end for inserting into the connecting port in the main support beam and connecting with the self-locking device of the transverse connecting beam; the other end is a connecting piece consistent with the main support beam, which is used to connect with the support beam or other transverse support beams. The latch is a carbon steel casting, and the main body is a rectangular parallelepiped. A raised first opening reinforcement is set near the sealing plate side, and a raised second opening reinforcement is also set at the inner position of the end (the opening on the opposite side of the main support beam connection port). The second opening reinforcement is wider than the first opening reinforcement. The two places are mainly used to strengthen the bending resistance of the main connection beam connection port; a cast steel lock with an arc-shaped upper part is set at the end of the latch.

[0048] The transverse connecting beam is composed of square steel, a sealing plate, a self-locking device and (or) a connecting piece. Similarly, sealing plates are set at both ends of the transverse connecting beam, a self-locking device is set at at least one end, and a connecting piece or a self-locking device can be set at the other end, so that the connecting beams can also be connected; if a self-locking device is set, a button hole is opened on the top of the square steel for unlocking during disassembly.

[0049] The self-locking device is arranged inside the square steel, and its elevation is arranged corresponding to the bolt part. It is composed of a base plate, a rotating shaft, a lock plate, a lock, a spring, and a button block; the base plate is arranged on the inner wall of the transverse connecting beam, and a rotating shaft with the same width as the inner wall is arranged above the base plate, and a lock plate is arranged at the position of the rotating shaft, and the lock plate can rotate around the rotating shaft; the lock of the lock plate also adopts a semicircular surface, which corresponds to the cast steel lock in the bolt part, so that the lock and lock can be directly opened and closed without operating the button during assembly; at the same time, a spring component is arranged at the end of the lock plate, and the lock plate is parallel to the base plate when there is no load, and the spring is in a natural state at this time; a button is arranged in the middle of the rear of the lock plate, which is used to press the lock plate to rotate when unlocking, so that the cast steel lock in the bolt part can be disengaged; a limit plate is arranged between the lock plate and the base plate to prevent the bolt part from being damaged by accidental operation when there is no main supporting beam.

[0050] In order to further illustrate the relationship between the various prefabricated components and the operating mechanism of the device, the following will be explained from the perspective of assembly:

[0051] The working mechanism of the connector is described by taking the connection of two sections of main support beams as an example: during assembly, the two sections of the main support beams are gradually moved closer together at the equipment debugging position. By utilizing the smooth characteristics of the graphene in the connector, each connector can be smoothly inserted into the gap between them. Then, the long bolts are screwed in from above to complete the connection. Disassembly only requires the reverse process.

[0052] Taking the typical main support beam, transverse support beam and transverse connecting beam connection as an example, the working mechanism of the latch and the self-locking device is described:

[0053] (1) The latch of the transverse connecting beam passes through the connection port of the main supporting beam, and the cast steel lock is exposed on the transverse connection side, wherein the opening reinforcement members are respectively located at the connection port of the main connecting beam to enhance the local strength;

[0054] (2) As the two transverse beams get closer, the arc surface of the cast steel lock squeezes the arc surface of the lock catch of the self-locking device, the lock catch plate rotates around the axis to squeeze the spring to form elastic force, and the button moves synchronously along the trajectory;

[0055] (3) When the two transverse beams are further pushed, the cast steel lock passes over the lock catch, and the spring force is released to return to the initial position. The contact surface between the cast steel lock and the lock catch is a vertical screen surface, and the lock catch plate cannot be rotated by pulling the two transverse beams apart, and the self-locking device completes the locking. In this state, the main body of the latch just contacts the limit plate of the self-locking device.

[0056] (4) When disassembling, the lock plate can be rotated by pressing the lock plate button, so that the two connecting sections can be separated and reused without the need for hot welding or cutting.

[0057] According to the existing arrangement of the platform structure beams, combined with the debugging equipment and the foundation conditions, different numbers of main support beams, transverse support beams and transverse connecting beams are selected. It is only necessary to transport each component to the designated location and carry out non-fire assembly operations on site to form a type suitable for the existing structure and foundation, so that the debugging equipment load can be transferred to the main platform structure beams.

[0058] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0059] like Figure 1 As shown, the load transfer frame of this embodiment is composed of a main support beam 1, a transverse support beam 2 and a transverse connecting beam 3. The transverse support beam 2 and the transverse connecting beam 3 together constitute a secondary support beam. The transverse connecting beam 3 is arranged between two sections of the main support beam 1. The transverse support beam 2 is arranged on the outside of the two sections of the main support beam 1 and is connected through a connecting port 14 in the main support beam 1.

[0060] like Figure 2 As shown, the main support beam 1 is composed of square steel 11, sealing plate 12 and connecting piece 13. Three connection ports 14 are reserved in the middle of the square steel 11 for connecting the transverse support beam 2 and the transverse connecting beam 3 with different connection positions and connection requirements, which is more adaptable to the position of the equipment base and the platform structure beam system. The two ends of the square steel 11 are closed with sealing plates 12 and a group of connecting pieces 13 (three pieces in this embodiment) are welded thereon. The spacing between the connecting pieces 13 is equivalent to the thickness, which is convenient for the cross connection of the two groups of connecting pieces 13. The connecting piece 13 is a carbon steel casting with three bolt holes 131 reserved in the middle. Bolts are used for fixed connection after docking.

[0061] like Figure 3a and Figure 3b As shown, the transverse support beam 2 is composed of square steel 11, a sealing plate 21, a latch 22 and a connector 13 (consistent with the connector 13 in the main support beam 1). A latch 22 is provided at one end of the transverse support beam 2, which can match the connection port 14 in the main support beam 1; the connector 13 at the other end is used to connect with the connectors of other components. The latch 22 is also a carbon steel casting, which is composed of a latch body 220, a first opening reinforcement 221, a second opening reinforcement 222 and a cast steel lock 223. The first opening reinforcement 221 and the second opening reinforcement 222 are used to strengthen the bending and shear strength of the connection 13 position reserved in the main support beam 1; a cast steel lock 223 with an arc-shaped upper portion is provided at the end of the latch 22.

[0062] like Figure 4a and Figure 4b As shown, the transverse connecting beam 3 is composed of a square steel 11, a self-locking device 31, and a free combination end 32. The self-locking device 31 is provided at least at one end of the square steel, and the free combination end 32 can be a connecting piece 13 or a self-locking device 31 to ensure different combinations. When the self-locking device 31 is provided, a button hole 317 is provided at the top of the square steel 11 for unlocking the self-locking device 31 when it is disassembled. The self-locking device 31 is arranged inside the square steel, and its elevation corresponds to the connection port 14 and the latch member 22. It is composed of a bottom plate 311, a rotating shaft 312, a locking plate 313, a locking buckle 314, a spring 315, a button block 316 and a limiting plate 318. The bottom plate 311 is arranged on the inner wall of the square steel 11, and a through rotating shaft 312 is arranged on the top, and the locking plate 313 can rotate around the rotating shaft 312. A locking buckle 313 with a semicircular surface is arranged at the end of the locking buckle plate 313, which corresponds to the cast steel lock 223 with a circular arc surface on the top, so as to facilitate direct insertion during assembly. Lock; four groups of springs 315 are set at the end of the lock plate 313. When the springs 315 are in a natural state, the lock plate 313 is parallel to the bottom plate 311. The setting of this structure is mainly used for automatic locking and unlocking operations to enhance the reliability of the connection; a button block 316 is set in the middle of the rear of the lock plate 313, which is used to press the button block 316 to rotate the lock plate 313 to disengage the lock 314 when unlocking; a limit plate 318 is set between the bottom plate 311 and the lock plate 313 to prevent the latch member 22 from entering too deep and damaging the spring group of the self-locking device 31 due to misoperation.

[0063] The working mechanism of the connecting member 13 is as follows Figure 5As shown, in order to improve the smoothness of the interface connection of the connector 13, a graphene coating 132 is sprayed on the upper and lower surfaces of the connector 13 to reduce friction and improve wear resistance. Combining the elevation view and the top view, first, the two parts to be connected are close to each other, and each group in the connector 13 is made to enter the upper and lower symmetrical gaps to complete the first connection, and then the long bolt 15 is screwed in from the top to complete the final connection. When disassembling, only the reverse process is required.

[0064] The working mechanism of the latch member 22 and the self-locking device 31 is as follows: Figure 6 As shown, first, the latch member 22 passes through the connection port 14 in the main support beam 1, wherein the first perforated reinforcement member 221 and the second perforated reinforcement member 222 are both inserted into the connection port 14 to strengthen the local structure, and at the same time, a graphene coating is also provided at the connection port position, and its function is consistent with that of the connector 13. In this step, the cast steel lock 223 has laterally passed through the main support beam 1. Subsequently, the two components are further approached, and the arc surface of the cast steel lock 223 squeezes the arc surface of the lock buckle 314, and the lock buckle plate 313 rotates around the rotating shaft 312. The end of the lock buckle plate 313 squeezes the spring 315 to form an elastic force, and the button block 316 moves synchronously with the trajectory, the lock buckle 314 opens, and the cast steel lock 223 slowly enters the interior of the self-locking device 31;

[0065] When further pushed for installation, the cast steel lock 223 passes over the lock buckle 314, and the elastic force of the spring 315 releases the lock buckle plate 313 to return to the initial position. The contact surface between the cast steel lock 223 and the lock buckle 314 increases to form self-locking. At this time, there is no gap between the components, and the top of the latch body 220 just contacts the limit plate 318, completing the self-locking installation and splicing.

[0066] If you want to disassemble it, you can press the button block 316 to rotate the lock plate 313 again. The cast steel lock 223 and the lock 314 are no longer in direct contact, the lock is opened, and the connecting sections are separated by pulling outward, thereby realizing the reuse of various components and other types of assembly.

[0067] Based on the above working principle, Figure 7The following is a typical arrangement of the embodiment in the platform after assembly. In this embodiment, the platform structural beams 4 are relatively sparse. If the load transfer frame is not set, the equipment base and the beam system will not be aligned, which will easily cause the deck structure to deform and damage. Considering the position of the equipment foundation base and the "well"-shaped platform structural beams at the same time, six sections of main support beams 1 and the corresponding three groups of transverse support beams 2 and transverse connecting beams 3 are selected for assembly and connection, wherein the assembled main support beams 1 and transverse connecting beams 3 correspond to the equipment base respectively; at the same time, the two outer transverse connecting beams 3 correspond to the platform structural beams 4, so that the equipment load can be transferred to the four structural beams of the "well"-shaped platform structural beams 4 through the six main support beams 1 and the three transverse connecting beams 3, ensuring the rationality of the load transfer path. At the same time, the application of the present invention can avoid on-site hot work, simple assembly and disassembly, strong adaptability, and can provide an efficient and reliable solution for the layout of temporary equipment during land commissioning of offshore converter stations.

[0068] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A spliced ​​load transfer frame for land commissioning of an offshore converter station, characterized in that: It includes a main support beam, a transverse connecting beam and a transverse support beam; The main support beam comprises a square steel, a sealing plate for sealing both ends of the square steel, and a connecting piece arranged on the sealing plate, wherein the connecting piece is used to connect two adjacent main support beams; a plurality of connecting ports are arranged on the side of the square steel, wherein the connecting ports are used to connect the transverse connecting beam and the transverse support beam; The transverse support beam and the transverse connecting beam together constitute a secondary support beam; The transverse support beam comprises a square steel, a sealing plate for sealing both ends of the square steel, a latch and a connecting piece, wherein the connecting piece is used to connect two adjacent transverse support beams or to connect a transverse support beam and a transverse connecting beam; The transverse connecting beam includes square steel, a sealing plate for sealing both ends of the square steel, and at least one self-locking device; the self-locking device is arranged on the sealing plate at the end of the square steel, and the self-locking device on the transverse connecting beam cooperates with the latch part on the transverse supporting beam in the connecting port of the main supporting beam.

2. The spliced ​​load transfer frame for land commissioning of offshore converter stations according to claim 1 is characterized in that: The connecting parts at both ends of the main support beam include a first connecting part and a second connecting part. The first connecting part and the second connecting part each include three connecting plates. The three connecting plates of the first connecting part of the first main support beam in adjacent main support beams are staggered with the three connecting plates of the second connecting part of the second main support beam so that the two are cross-closed and locked by bolts.

3. The spliced ​​load transfer frame for land commissioning of offshore converter stations according to claim 2 is characterized in that: The outer surface of the connecting plate is sprayed with a graphene coating.

4. The spliced ​​load transfer frame for land commissioning of an offshore converter station according to claim 1 is characterized in that: The latch member is provided with a first opening reinforcement member, a second opening reinforcement member and a cast steel lock; The cast steel lock is arranged on the outer end of the latch member, the first perforated reinforcement member is arranged close to the sealing plate of the transverse support beam, and the second perforated reinforcement member is between the cast steel lock and the first perforated reinforcement member and is arranged close to the cast steel lock.

5. The spliced ​​load transfer frame for land commissioning of offshore converter stations according to claim 4 is characterized in that: The top of the cast steel lock has an arc surface.

6. The spliced ​​load transfer frame for land commissioning of offshore converter stations according to claim 4 is characterized in that: The width of the second perforated reinforcement member is greater than the width of the first perforated reinforcement member.

7. The spliced ​​load transfer frame for land commissioning of an offshore converter station according to claim 1 is characterized in that: The self-locking device includes a base plate, a rotating shaft, a locking plate, a locking buckle, a spring, and a button block; A rotating shaft is provided above the bottom plate, and the rotating shaft is passed through the side wall of the transverse connecting beam, and the extending direction of the rotating shaft is perpendicular to the insertion direction of the latch member. The locking plate is passed through the rotating shaft, and the locking plate is provided with a lock at the end facing the latch member, and the locking plate is provided with a plurality of springs at the end away from the latch member, and the two ends of the springs are respectively fixed to the latch member and the bottom plate; a button block is provided on the upper surface of the locking plate, and the button block is located at the end of the locking plate provided with the spring, and a button hole is provided at a position corresponding to the button block on the transverse connecting beam.

8. The spliced ​​load transfer frame for land commissioning of an offshore converter station according to claim 7 is characterized in that: The self-locking device is also provided with a limit plate, which is arranged on the bottom plate and is located between the lock buckle and the spring to space the latch and the spring.

9. The spliced ​​load transfer frame for land commissioning of an offshore converter station according to claim 7 is characterized in that: The end surface of the lock catch and the latch member that cooperates with each other is an arc surface.

10. Application of the spliced ​​load transfer frame for land commissioning of an offshore converter station according to any one of claims 1 to 9 on an offshore converter station platform.

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