Single-pile anti-corrosion structure in splash zone

Abstract

The utility model relates to the technical field of wind power generation, in particular to a splash zone single pile anti-corrosion structure which comprises a single pile body, an anti-corrosion device is arranged on a splash zone of the single pile body, and the anti-corrosion device comprises an impressed current anti-corrosion device and a composite coating anti-corrosion device. The impressed current anti-corrosion device comprises a platform arranged on the upper portion of a single pile body, a constant potential rectifier placed on the platform, a current sensor and an auxiliary anode arranged on a splash zone, a reference electrode arranged at the bottom of the single pile body, and the constant potential rectifier, the current sensor and the auxiliary anode are connected in series through a cable. The composite coating anti-corrosion device comprises a composite anti-corrosion paste layer arranged outside the splash zone of the single pile body, an anti-corrosion buffer strip layer arranged outside the composite anti-corrosion paste layer, a waterproof ring layer arranged outside the anti-corrosion buffer strip layer, and a winding adhesive tape layer arranged outside the waterproof ring layer.

Description

Technical Field

[0001] This utility model relates to a single-pile anti-corrosion structure in the splash zone, belonging to the field of wind power generation technology. Background Technology

[0002] Offshore wind energy is an important clean energy source, and my country's wind power industry is experiencing rapid growth. Currently, due to the superior bearing capacity and convenient construction of pile foundations, offshore wind power projects generally use large-diameter monopile foundations. However, the marine environment contains chloride ions, oxygen, ultraviolet radiation, and marine organisms, which can easily cause corrosion to the surface of the steel pipe piles (splash zone), thus affecting their bearing capacity. Therefore, anti-corrosion structures are installed in the splash zone of the monopile foundation. Current anti-corrosion structures mostly employ wrapping or impressed current corrosion protection. However, wrapping corrosion protection has the potential for leakage and provides weak protection outside the wrapped area, while impressed current corrosion protection has high power requirements and the auxiliary anode also suffers losses. Therefore, further research is needed on the anti-corrosion construction technology for large-diameter monopile foundations in offshore wind power. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the prior art and provide a corrosion-resistant structure for monopile in the splash zone, which can effectively prevent the monopile body from corroding due to contact with seawater and air, thereby achieving effective protection of the monopile in the splash zone and ensuring the smooth operation of the wind turbine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A splash zone monopile corrosion protection structure includes a monopile body, with a corrosion protection device installed on the splash zone of the monopile body. The corrosion protection device includes an impressed current corrosion protection device and a composite coating corrosion protection device. The impressed current corrosion protection device includes a platform installed on the upper part of the monopile body, a potentiostat placed on the platform, a current sensor and an auxiliary anode installed on the splash zone, and a reference electrode installed at the bottom of the monopile body. The potentiostat, current sensor and auxiliary anode are connected in series by a cable. The composite coating corrosion protection device includes a composite anti-corrosion paste layer installed outside the splash zone of the monopile body, an anti-corrosion buffer layer installed outside the composite anti-corrosion paste layer, a waterproof ring layer installed outside the anti-corrosion buffer layer, and a wrapping tape layer installed outside the waterproof ring layer.

[0006] Furthermore, the composite anti-corrosion paste layer is composed of a composite rust inhibitor, a petrolatum anti-corrosion paste, and an epoxy resin adhesive solid.

[0007] Furthermore, the corrosion-resistant buffer layer is composed of foam filler, geotextile base layer, flexible waterproof layer and polyethylene buffer lining.

[0008] This utility model discloses a wave-splash zone monopile anti-corrosion structure. By incorporating an impressed current anti-corrosion device, a cathodic protection potential is obtained on the surface of the monopile, achieving a good anti-corrosion effect. Simultaneously, a multi-layered composite coating anti-corrosion device is used to form multiple protective layers on the surface of the monopile's wave-splash zone, reducing the contact between the wave-splash zone surface and seawater and air, thereby slowing down the corrosion rate and achieving anti-corrosion of the monopile's wave-splash zone. This solution effectively prevents corrosion of the monopile body due to contact with seawater and air. It is easy to install and disassemble, low in cost, and simple to replace components, effectively reducing application costs while achieving a good anti-corrosion effect on the monopile body. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a single-pile anti-corrosion structure for splash zone according to this utility model;

[0010] Figure 2 This is a schematic diagram of the structure of the impressed current corrosion protection device of this utility model;

[0011] Figure 3 This is a schematic diagram of the composite coating anti-corrosion device of this utility model. Detailed Implementation

[0012] The present invention will be described in detail below with reference to specific implementation examples. The following implementation examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0013] like Figure 1 — Figure 3 As shown, this utility model relates to a splash zone monopile anti-corrosion structure, including a monopile body 1, and an anti-corrosion device installed on the splash zone 4 of the monopile body 1. The anti-corrosion device includes an impressed current anti-corrosion device 2 and a composite coating anti-corrosion device 3. The impressed current anti-corrosion device 2 includes a platform 20 installed on the upper part of the monopile body 1, a potentiostat 21 placed on the platform, a current sensor 23 and an auxiliary anode 24 installed on the splash zone 4, and a reference electrode 25 installed at the bottom of the monopile body 1. The potentiostat 21, the current sensor 23 and the auxiliary anode 24 are connected in series by a cable 22. The composite coating anti-corrosion device 3 includes a composite anti-corrosion paste layer 31 installed outside the splash zone 4 of the monopile body 1, an anti-corrosion buffer layer 32 installed outside the composite anti-corrosion paste layer 31, a waterproof ring layer 33 installed outside the anti-corrosion buffer layer 32, and a wrapping tape layer 34 installed outside the waterproof ring layer 33.

[0014] In this scheme, the impressed current corrosion protection device 2 has a potentiostat 21 placed on a platform. The cable 22 is used to connect the potentiostat 21, the current sensor 23, the auxiliary anode 24, and the reference electrode 25. The current sensor 23 is used to monitor the current. The auxiliary anode 24 is attached to the surface of the splash zone 4 of the single pile body 1. The reference electrode 25 is placed at the bottom of the single pile body. This impressed current corrosion protection device 2 can obtain a cathodic protection potential on the surface of the splash zone 4 of the single pile body 1, thus achieving a better corrosion protection effect.

[0015] The composite coating anti-corrosion device 3 comprises a composite anti-corrosion paste layer 31, an anti-corrosion buffer layer 32, a waterproof ring layer 33, and a wrapping tape layer 34. The composite anti-corrosion paste layer 31 is composed of a composite rust inhibitor, petrolatum anti-corrosion paste, and epoxy resin adhesive. The anti-corrosion buffer layer 32 is composed of a foam filler, a geotextile base layer, a flexible waterproof layer, and a polyethylene buffer lining. The wrapping tape layer 34 cures upon exposure to light and is used to coat and fix the internal composite anti-corrosion paste layer 31, anti-corrosion buffer layer 32, and waterproof ring layer 33. This composite coating anti-corrosion device 3 can form multiple protective layers on the surface of the splash zone 4 of the single pile body 1, reducing the contact between the surface of the splash zone of the single pile body and seawater and air, thereby slowing down the corrosion rate.

[0016] During operation, first install the external current anti-corrosion device 2, then attach the auxiliary anode 24 to the surface of the splash zone 4 of the single pile body 1, and then install the composite anti-corrosion paste layer 31, the anti-corrosion buffer layer 32 and the waterproof ring layer 33 in sequence. Finally, use the light-curing wrapping tape layer 34 to cover it.

[0017] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A splash zone monopile corrosion protection structure, comprising a monopile body (1), wherein a corrosion protection device is provided on the splash zone (4) of the monopile body (1), characterized in that: The anti-corrosion device includes an impressed current anti-corrosion device (2) and a composite coating anti-corrosion device (3). The impressed current anti-corrosion device (2) includes a platform (20) set on the upper part of the single pile body (1), a constant potential meter (21) placed on the platform, a current sensor (23) and an auxiliary anode (24) set on the splash zone (4), a reference electrode (25) set at the bottom of the single pile body (1), and the potentiometer (21), the current sensor (23) and the auxiliary anode (24) connected in series by a cable (22). The composite coating anti-corrosion device (3) includes a composite anti-corrosion paste layer (31) set outside the splash zone (4) of the single pile body (1), an anti-corrosion buffer layer (32) set outside the composite anti-corrosion paste layer (31), a waterproof ring layer (33) set outside the anti-corrosion buffer layer (32), and a wrapping tape layer (34) set outside the waterproof ring layer (33).

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