Independent berthing ladder stand for single pile foundation and trial assembly method of independent berthing ladder stand

Abstract

The invention discloses an independent berthing ladder stand for a single pile foundation and a trial assembly method thereof.The berthing ladder stand comprises a berthing component and a ladder stand body, the berthing component comprises a berthing column, a berthing connecting piece, a berthing rooting piece and a berthing buffering piece, the berthing column is fixed to the berthing rooting piece through the berthing connecting piece, the berthing rooting piece is fixed to the single pile foundation, and the ladder stand body is fixed to the berthing buffering piece. The berthing buffering piece is connected between the berthing connecting piece and the berthing rooting piece, the crawling ladder comprises a crawling ladder main body, a crawling ladder connecting piece, a crawling ladder rooting piece and a crawling ladder buffering piece, the crawling ladder buffering piece is connected between the crawling ladder connecting piece and the crawling ladder rooting piece, the crawling ladder main body is fixed on the crawling ladder rooting piece through the crawling ladder connecting piece, and the crawling ladder rooting piece is fixed on the single pile foundation. The berthing component and the crawling ladder are independently installed on the single-pile foundation through the buffering device, and the structure is safer and more reliable; the berthing component and the crawling ladder rooting piece are installed in an assembly welding mode, and the problem that interference exists when the berthing component and the crawling ladder are installed is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and particularly to an independent mooring ladder for a monopile foundation and a trial installation method thereof. Background Art

[0002] As one of the main clean and renewable energy sources, wind energy has developed rapidly in recent years. Wind power generation is a green power generation form that converts wind energy into electrical energy. According to the different construction locations, wind power generation can be divided into onshore wind power and offshore wind power. Offshore wind power has the advantages of richer wind resources, less noise and visual pollution, and being unrestricted by land resources compared with onshore wind power. Offshore wind power has great development potential and good market prospects.

[0003] The monopile foundation is one of the most commonly used foundation types in offshore wind power. Its main characteristics are simple structure, short production cycle, and convenient construction. The monopile foundation mainly consists of two parts: the monopile foundation and the accessory components. The common structural form of the accessory components is an integrated cage formed by integrating parts such as a fender component, a ladder, and an outer platform. The accessory components of this structural form can be hoisted as a whole, saving offshore construction time. However, this integrated accessory component also has a fatal disadvantage, that is, its overall strength is not very high. During service, under the action of periodic wave loads or frequent impacts from maintenance vessels, the mooring ladder is easily damaged or even falls off.

[0004] In view of the above problems, it is necessary to design a new type of mooring ladder structure for a monopile foundation to improve its service life. Summary of the Invention

[0005] The purpose of the present invention is to provide an independent mooring ladder for a monopile foundation and a trial installation method thereof to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: The mooring ladder includes two parts: a fender component and a ladder. The fender component and the ladder are independently designed. The fender component is installed below the ladder. The fender component includes a fender post, a fender connecting piece, a fender rooting piece, and a fender buffer piece. The fender rooting piece is spot-welded and fixed on the monopile foundation. The fender post is fixed on the fender rooting piece through the fender connecting piece. The fender buffer piece is connected between the fender connecting piece and the fender rooting piece. The ladder includes a ladder main body, a ladder connecting piece, a ladder rooting piece, and a ladder buffer piece. The ladder rooting piece is spot-welded and fixed on the monopile foundation. The ladder main body is fixed on the ladder rooting piece through the ladder connecting piece. The ladder buffer piece is connected between the ladder connecting piece and the ladder rooting piece.

[0007] Furthermore, the mooring connection piece includes a flange and a pin, the flange and the pin of the mooring connection piece are distributed at different heights of the mooring column and are respectively fixed on the mooring column through steel pipes, the mooring rooting piece includes a flange and a sleeve, the flange and the sleeve of the mooring rooting piece are rooted on the single pile foundation through the steel pipe, the pin of the mooring connection piece is connected with the sleeve of the mooring rooting piece after being put on the mooring buffer piece, and the flange of the mooring connection piece is correspondingly connected with the flange of the mooring rooting piece.

[0008] Furthermore, the mooring buffer is a sleeve made of rubber material, and a plurality of convex strips are arranged on the outer surface.

[0009] Furthermore, the ladder connecting piece includes a flange and a latch, and the flange and the latch of the ladder connecting piece are respectively fixed at different height positions of the ladder main body through steel pipes, and the ladder rooting piece includes a flange and a sleeve, and the flange and the sleeve of the ladder rooting piece are rooted on the single pile foundation through steel pipes, and the flange of the ladder connecting piece is correspondingly connected to the flange of the ladder rooting piece, and the latch of the ladder rooting piece is connected to the sleeve of the ladder rooting piece after being put on the ladder buffer.

[0010] Furthermore, the ladder buffer is a sleeve made of rubber material, and a plurality of convex strips are provided on the outer surface.

[0011] Furthermore, the mooring component also includes a mooring component ladder, an external current system mounting bracket, a rest platform, a mooring component external current wiring pipe and a mooring component grounding system, the mooring component ladder is connected to the mooring column through a steel pipe, the external current system mounting bracket is integrated at the lowermost end of the mooring component, the rest platform is integrated at the upper end of the mooring column, and the mooring component external current system wiring pipe is integrated inside any mooring column and remains connected with the external current system mounting bracket.

[0012] Furthermore, the moored component grounding system includes two grounding studs and a grounding wire.

[0013] Furthermore, the ladder also includes a protective cage, a ladder external current wiring tube and a ladder grounding system. The protective cage is fixed on the main body, and the ladder external current wiring tube is integrated into the side of the ladder.

[0014] Furthermore, the ladder grounding system includes two grounding studs and a grounding wire.

[0015] A trial installation method for an independent berthing ladder for a single pile foundation, the method comprising: S1: Complete the overall assembly and welding of the berthing member according to the construction drawings of the berthing member: manufacture each component according to the drawings of the berthing column, berthing connecting piece, berthing root piece, and berthing buffer piece; connect the berthing buffer piece between the berthing connecting piece and the berthing root piece; assemble the berthing column and the berthing root piece into one body, position and install the berthing column according to the layout drawing of the berthing member, and spot-weld the berthing root piece to the main body of the monopile foundation; remove the berthing column and complete the welding work of the berthing root piece. S2: Complete the overall assembly and welding of the ladder according to the construction drawings of the ladder: manufacture each component according to the drawings of the main body, ladder connecting piece, ladder root piece, and ladder buffer piece; connect the ladder buffer piece between the ladder connecting piece and the ladder root piece; assemble the main body and the ladder root piece into one body, position and install the ladder according to the layout drawing of the ladder, and spot-weld the ladder root piece to the main body of the monopile foundation; remove the main body and complete the welding work of the ladder root piece.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The berthing member and the ladder of the present invention adopt an integrated design respectively, with simple structure, complete functions, and convenient installation; The independent berthing member and ladder structure design greatly reduces the steel consumption compared with the cage structure; The berthing member and the ladder are independently installed on the monopile foundation through a buffer device, and the structure is safer and more reliable; The berthing member and the ladder root piece are respectively installed on the monopile foundation by means of assembly welding, effectively solving the problem of interference during the installation of the berthing member and the ladder. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the independent berthing ladder for monopile foundation of the present invention; Figure 2 It is a schematic structural diagram of the berthing member in the independent berthing ladder for monopile foundation of the present invention; Figure 3 It is a schematic structural diagram of the ladder in the independent berthing ladder for monopile foundation of the present invention; Figure 4 It is a schematic structural diagram of the berthing buffer piece and the ladder buffer piece in the independent berthing ladder for monopile foundation of the present invention; Figure 5 It is a schematic structural diagram of the berthing member connecting piece in the independent berthing ladder for monopile foundation of the present invention; Figure 6 It is a schematic structural diagram of the berthing member root piece in the independent berthing ladder for monopile foundation of the present invention; Figure 7 It is a schematic structural diagram of the ladder connecting piece in the independent berthing ladder for monopile foundation of the present invention; Figure 8 It is a schematic structural diagram of the ladder root piece in the independent berthing ladder for monopile foundation of the present invention.

[0018] In the figure, 1 - single-pile foundation, 2 - ship-berthing member, 201 - ship-berthing column, 202 - ship-berthing member ladder, 203 - mounting bracket for impressed current system, 204 - rest platform, 205 - impressed current wiring pipe for ship-berthing member, 206 - ship-berthing buffer, 207 - earthing system for ship-berthing member, 208 - ship-berthing connector, 209 - ship-berthing root member, 3 - ladder, 301 - ladder main body, 302 - safety cage, 303 - impressed current wiring pipe for ladder, 304 - ladder buffer, 305 - earthing system for ladder, 306 - ladder connector, 307 - ladder root member, 4 - outer platform, 5 - flange, 6 - bolt, 7 - sleeve. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figure 1-8 shown, this embodiment provides an independent berthing ladder for a single-pile foundation. The berthing ladder includes a ship-berthing member 2 and a ladder 3 connected to the single-pile foundation 1.

[0021] The ship-berthing member 2 is installed below the ladder 3 and is used for berthing ships. It includes a ship-berthing column 201, a ship-berthing member ladder 202, a mounting bracket 203 for an impressed current system, a rest platform 204, an impressed current wiring pipe 205 for the ship-berthing member, a ship-berthing buffer 206, an earthing system 207 for the ship-berthing member, a ship-berthing connector 208, and a ship-berthing root member 209.

[0022] As Figure 2 shown, there are two ship-berthing columns 201, which are symmetrically arranged. The ship-berthing column 201 is usually a seamless steel pipe with a larger diameter and a thicker wall thickness, and directly bears the impact of the installation or maintenance ship during operation. The ship-berthing member ladder 202 is connected to the ship-berthing column 201 through a steel pipe, and installation or maintenance personnel can enter the upper ladder 3 through the ship-berthing member ladder 202. The ship-berthing column 201 is fixed to the ship-berthing root member 209 through the ship-berthing connector 208. The ship-berthing root member 209 is spot-welded to the single-pile foundation 1. The ship-berthing buffer 206 is connected between the ship-berthing connector 208 and the ship-berthing root member 209, and the impact of the installation or maintenance ship on the main body 1 of the single-pile foundation is reduced through the ship-berthing buffer 206.

[0023] Specifically, as Figure 5As shown, the fender member connector 208 is provided with two flanges 5 and four pins 6. The flanges 5 and pins 6 are respectively fixed at different height positions of the fender post 201 through steel pipes, playing the role of fixing and connecting the fender member 2. Two flanges 5 are arranged at the upper end of the fender post 201, and four pins 6 are arranged in the middle and lower ends of the fender post 201, as Figure 6 shown, the fender member root part 209 includes two flanges 5 and four sleeves 7, corresponding to the two flanges 5 and four pins 6 of the fender member connector 208 respectively. The flanges 5 and sleeves 7 of the fender member root part 209 are respectively rooted in the monopile foundation 1 through steel pipes, playing the role of fixing the fender member 2. The fender member buffer 206 is a rubber-like product, sleeved on the pins 6 of the fender member connector 208, playing a buffering role between the pins 6 and the sleeves 7, as Figure 4 shown, the fender member buffer 206 is of a sleeve type structure, with its outer surface designed in a serrated shape and evenly distributed with a plurality of stripe protrusions to increase or decrease the buffering effect. During installation, the flange 5 of the fender member connector 208 is connected to the flange 5 of the fender member root part 209. After the fender member buffer 206 is installed on the pin 6 of the fender member connector 208, it is connected in the sleeve 7 of the fender member root part 209.

[0024] The impressed current system mounting bracket 203 is integrated at the lowermost end of the fender member 2 and is underwater during operation. A number of connecting flanges 5 are arranged thereon for connecting the auxiliary anode and the reference electrode of the impressed current system. The rest platform 204 is integrated at the upper end of one fender post 201 for installers or maintenance personnel to take a short break midway. The fender member impressed current system wiring pipe 205 is integrated inside one of the fender posts 201 and is kept in communication with the impressed current system mounting bracket 203 for arranging the cables of the auxiliary anode and the reference electrode, playing a role in protecting the cables. The fender member grounding system 207 includes two grounding studs and a grounding wire, playing a role in grounding protection.

[0025] The design of integrating the fender member 2 with the fender post 201, the fender member ladder 202, the impressed current system bracket 203, the rest platform 204, the fender member grounding system 207, the root part 208 and the fender member impressed current cable wiring pipe 205 has a simple structure and is convenient for installation.

[0026] The ladder 3 is installed above the fender member 2. Through the ladder 3, installers and maintenance personnel can enter the outer platform 4 of the monopile foundation 1. The ladder includes a ladder main body 301, a safety cage 302, a ladder impressed current wiring pipe 303, a ladder buffer 304, a ladder grounding system 305, a ladder connector 306 and a ladder root part 307.

[0027] As Figure 3As shown, the ladder main body 301 is the walking passage for installation or operation and maintenance personnel. The ladder main body 301 is fixed to the ladder rooting member 307 through the ladder connecting member 306. The ladder rooting member 307 is spot-welded to the monopile foundation 1. The ladder buffer member 304 is connected between the ladder connecting member 306 and the ladder rooting member 307 to reduce the impact of the installation or operation and maintenance ship on the monopile foundation main body 1 through the ladder buffer member 304. Specifically, as Figure 7-8 shown, the ladder connecting member 306 includes two flanges 5 and two pins 6. The flanges 5 and pins 6 of the ladder connecting member 306 are respectively connected to the ladder main body 301 through steel pipes, playing the role of fixing and connecting the ladder 3. The ladder rooting member 307 includes two flanges 5 and two sleeves 7, corresponding to the two flanges 5 and two pins 6 of the ladder connecting member 306 respectively. The flanges 5 and sleeves 7 of the ladder rooting member 307 are respectively rooted in the monopile foundation 1 through steel pipes, playing the role of fixing the ladder 3. During installation, the flange 5 of the ladder connecting member 306 is connected to the flange 5 of the ladder rooting member 307, the pin 6 of the ladder connecting member 306 is installed in the sleeve 7 of the ladder rooting member 307, and the ladder buffer member 304 is also sleeved on the pin 6 of the ladder connecting member 306. The ladder buffer member 304 has the same structure as the berthing member buffer member 206 and is a rubber product. It is installed between the ladder connecting member 306 and the ladder rooting member 307 to play a buffering role. The outer surface is designed in a serrated shape with multiple stripe protrusions evenly distributed to increase or decrease the buffering effect.

[0028] The protective cage 302 is fixed to the ladder main body 301 to protect the installation and operation and maintenance personnel. The external current wiring pipe 303 of the ladder is integrated on the side of the ladder 3 and is used to lay the cables of the auxiliary anode and the reference electrode, playing a role in protecting the cables. The ladder grounding system 305 includes two grounding studs and a grounding wire, playing a role in grounding protection.

[0029] The design of integrating the ladder 3 with the ladder main body 301, the protective cage 302, the ladder rooting member 306, and the external current cable wiring pipe 303 of the ladder is also simple in structure and convenient for installation.

[0030] This embodiment also provides a trial installation method for an independent berthing ladder for a monopile foundation. The method includes: S1: Complete the overall assembly and welding of the berthing member according to the construction drawings of the berthing member. Specifically, S11: Complete the production of each component according to the drawings of the berthing post, berthing connecting member, berthing rooting member, and berthing buffer member. S12: Connect the ship-berthing buffer between the ship-berthing connecting member and the ship-berthing rooting member. Specifically, install the ship-berthing buffer on the pin of the ship-berthing connecting member, then insert the pin of the ship-berthing connecting member into the corresponding sleeve of the ship-berthing rooting member, and at the same time use bolts and nuts to tightly fix the two flanges of each together to complete the connection between the ship-berthing connecting member and the ship-berthing rooting member. In this step, the ship-berthing rooting member cannot be welded to the single-pile foundation main body; S13: Assemble the ship-berthing column with the ship-berthing rooting member, position and install the ship-berthing column according to the ship-berthing member layout drawing, and spot-weld the ship-berthing rooting member to the single-pile foundation main body; S14: Remove the ship-berthing column and complete the welding work of the ship-berthing rooting member; S2: Complete the overall assembly and welding of the ladder according to the construction drawings of the ladder, Specifically, S21: Complete the production of each component according to the drawings of the main body, ladder connecting member, ladder rooting member and ladder buffer; S22: Connect the ladder buffer between the ladder connecting member and the ladder rooting member. Specifically, install the ladder buffer on the pin of the ladder connecting member, then insert the pin of the ladder connecting member into the corresponding sleeve of the ladder rooting member, and at the same time use bolts and nuts to tightly fix the two flanges of each together to complete the connection between the ladder connecting member and the ladder rooting member. In this step, the ladder rooting member cannot be welded to the single-pile foundation main body; S23: Assemble the ladder main body with the ladder rooting member, position and install the ladder according to the ladder layout drawing, and spot-weld the ladder rooting member to the single-pile foundation main body; S24: Remove the main body and complete the welding work of the ladder rooting member.

[0031] In this way, the overall trial assembly work of the berthing ladder and the positioning and installation work of the rooting member are completed. The ship-berthing rooting member and the ladder rooting member adopt the method of assembly welding, effectively avoiding the situation of interference during the installation of the ship-berthing member and the ladder due to manufacturing dimension errors.

[0032] The ship-berthing member and the ladder of the present invention respectively adopt an integrated design, with simple structure, complete functions and convenient installation; the independent ship-berthing member and ladder structure design greatly reduces the steel consumption compared with the cage structure; the ship-berthing member and the ladder are independently installed on the single-pile foundation through the buffer device, and the structure is safer and more reliable; the ship-berthing member and the ladder rooting member are respectively installed on the single-pile foundation by the method of assembly welding, effectively solving the problem of interference during the installation of the ship-berthing member and the ladder.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An independent mooring ladder for a single-pile foundation, characterized in that: The berthing ladder includes two parts: a ship-berthing member and a ladder. The ship-berthing member and the ladder are designed independently. The ship-berthing member is installed below the ladder. The ship-berthing member includes a ship-berthing column, a ship-berthing connecting member, a ship-berthing root member, and a ship-berthing buffer member. The ship-berthing column is fixed to the ship-berthing root member through the ship-berthing connecting member. The ship-berthing buffer member is connected between the ship-berthing connecting member and the ship-berthing root member. The ship-berthing root member is spot-welded to the monopile foundation. The ladder includes a ladder main body, a ladder connecting member, a ladder root member, and a ladder buffer member. The ladder main body is fixed to the ladder root member through the ladder connecting member. The ladder buffer member is connected between the ladder connecting member and the ladder root member. The ladder root member is spot-welded to the monopile foundation.

2. The independent mooring climbing ladder for a single-pile foundation according to claim 1, wherein: The ship-berthing connecting member includes a flange and a pin. The flange and the pin of the ship-berthing connecting member are distributed at different heights of the ship-berthing column and are respectively fixed to the ship-berthing column through steel pipes. The ship-berthing root member includes a flange and a sleeve. The flange and the sleeve of the ship-berthing root member are rooted to the monopile foundation through steel pipes. The pin of the ship-berthing connecting member is sleeved with the ship-berthing buffer member and then connected to the sleeve of the ship-berthing root member. The flange of the ship-berthing connecting member is correspondingly connected to the flange of the ship-berthing root member.

3. The independent mooring ladder for single-pile foundation according to claim 2, characterized in that: The ship-berthing buffer member is a casing made of rubber material, and a plurality of ridges are provided on the outer surface.

4. The freestanding mooring ladder for single-pile foundation according to claim 1, wherein: The ladder connecting member includes a flange and a pin. The flange and the pin of the ladder connecting member are respectively fixed at different height positions of the ladder main body through steel pipes. The ladder root member includes a flange and a sleeve. The flange and the sleeve of the ladder root member are rooted to the monopile foundation through steel pipes. The flange of the ladder connecting member is correspondingly connected to the flange of the ladder root member. The pin of the ladder root member is sleeved with the ladder buffer member and then connected to the sleeve of the ladder root member.

5. The independent mooring climbing ladder for single-pile foundation according to claim 2, characterized in that: The ladder buffer member is a casing made of rubber material, and a plurality of ridges are provided on the outer surface.

6. The independent mooring ladder for single-pile foundation according to claim 1, wherein: The ship-berthing member further includes a ship-berthing member ladder, an impressed current system installation bracket, a rest platform, a ship-berthing member impressed current wiring pipe, and a ship-berthing member grounding system. The ship-berthing member ladder is fixed to the ship-berthing column through a steel pipe. The impressed current system installation bracket is integrated at the lowermost end of the ship-berthing member. The rest platform is integrated at the upper end of the ship-berthing column. The ship-berthing member impressed current system wiring pipe is integrated inside any one of the ship-berthing columns and is kept in communication with the impressed current system installation bracket.

7. The independent mooring ladder for single-pile foundation according to claim 6, characterized in that: The ship-berthing member grounding system includes two grounding studs and a grounding wire.

8. The independent mooring ladder for single-pile foundation according to claim 1, wherein: The ladder further includes a protective cage, a ladder impressed current wiring pipe, and a ladder grounding system. The protective cage is fixed to the ladder main body. The ladder impressed current wiring pipe is integrated on the side of the ladder.

9. The independent mooring climbing ladder for single-pile foundation according to claim 8, characterized in that: The ladder grounding system includes two grounding studs and a grounding wire.

10. A trial installation method for an independent mooring ladder for a single-pile foundation, characterized in that, The method includes: S1: Complete the overall assembly and welding of the ship fender member according to the construction drawings of the ship fender member: fabricate each component according to the drawings of the ship fender post, ship fender connecting member, ship fender root member, and ship fender buffer member; connect the ship fender buffer member between the ship fender connecting member and the ship fender root member; assemble the ship fender post and the ship fender root member into one body, position and install the ship fender post according to the ship fender member layout drawing, and spot-weld the ship fender root member to the single-pile foundation main body; remove the ship fender post and complete the welding work of the ship fender root member. S2: Complete the overall assembly and welding of the ladder according to the construction drawings of the ladder: fabricate each component according to the drawings of the ladder main body, ladder connecting member, ladder root member, and ladder buffer member; connect the ladder buffer member between the ladder connecting member and the ladder root member; assemble the ladder main body and the ladder root member into one body, position and install the ladder according to the ladder layout drawing, and spot-weld the ladder root member to the single-pile foundation main body; remove the ladder main body and complete the welding work of the ladder root member.

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