CA2778376A1 - Anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, foundation pipe of an offshore wind power plant and connecting structure between them, cathodic corrosion protection device for foundation pipes of offshore wind power plants and offshore wind power plant - Google Patents

Anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, foundation pipe of an offshore wind power plant and connecting structure between them, cathodic corrosion protection device for foundation pipes of offshore wind power plants and offshore wind power plant Download PDF

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Publication number
CA2778376A1
CA2778376A1 CA2778376A CA2778376A CA2778376A1 CA 2778376 A1 CA2778376 A1 CA 2778376A1 CA 2778376 A CA2778376 A CA 2778376A CA 2778376 A CA2778376 A CA 2778376A CA 2778376 A1 CA2778376 A1 CA 2778376A1
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CA
Canada
Prior art keywords
foundation
offshore wind
wind power
foundation pipe
corrosion protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA2778376A
Other languages
French (fr)
Inventor
Robert Ebert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bard Holding GmbH
Original Assignee
Bard Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bard Holding GmbH filed Critical Bard Holding GmbH
Publication of CA2778376A1 publication Critical patent/CA2778376A1/en
Abandoned legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • E02D27/425Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/52Submerged foundations, i.e. submerged in open water
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/727Offshore wind turbines

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Foundations (AREA)
  • Wind Motors (AREA)

Abstract

The invention relates to an anode retainer for cathodic corrosion protection apparatuses of foundation pipes of offshore wind turbines, comprising: a metal cylinder ring having a longitudinal axis and an outside and an inside, wherein a plurality of positioning devices for concentrically self-positioning, in particular without tools, and fixing, in particular in a force-closed manner, the cylinder ring on a foundation pipe under gravity while interacting with corresponding positioning projections located on the outside of the foundation pipe is provided on the inside of the cylinder ring over the circumference, to a foundation pipe of an offshore wind turbine, characterized in that a plurality of positioning projections is provided on the outside of said foundation pipe over a cylinder ring area and a connecting structure therebetween, to a cathodic corrosion protection device for foundation pipes of offshore wind turbines, and to an offshore wind turbine having the same.

Description

"Anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, foundation pipe of an offshore wind power plant and connecting structure between them, cathodic corrosion protection device for foundation pipes of offshore wind power plants and offshore wind power plant"

The present invention relates to an anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, a foundation pipe of an offshore wind power plant, a connecting structure between a foundation pipe, an offshore wind power plant and an anode retainer, a cathodic corrosion protection device for foundation pipes of offshore wind power plants and an offshore wind power plant with at least one foundation pipe and with a cathodic corrosion protection device.

An active corrosion protection for the foundation pipes is usual in offshore wind power plants. This corrosion protection can be achieved in the form of cathodic corrosion protection with external power supply or with galvanic anodes. For the arrangement of the essential components of a so-called external power supply system, such as anodes, distributor boxes, cables and reference electrodes, below the water level, clamping rings must be tightened in such a construction under water by divers. Diving works result in very high costs and are highly dependent upon the weather.

It is thus an object of the invention to facilitate the installation of a cathodic corrosion protection device in offshore wind power plants without the use of divers.

According to the invention this object is achieved according to a first aspect by an anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, comprising: a metallic cylinder ring with a longitudinal axis and an outside and an inside, wherein on the inside around the periphery a plurality of positioning devices are provided for, in particular tool-free, concentric self-positioning and, in particular force-locking, fixing of the cylinder ring on a foundation pipe under the effect of gravity while interacting with corresponding positioning projections arranged on the outside of the foundation pipe.
2 Furthermore this object is achieved according to a second aspect by a foundation pipe of an offshore wind power plant, characterised in that a plurality of positioning projections are provided on the outside thereof over a cylinder ring region.

According to a third aspect this object is achieved by a connecting structure between a foundation pipe of an offshore wind power plant according to one of the claims 7 to 10 and an anode retainer according to one of the claims 1 to 6, wherein the anode retainer is arranged concentrically around the foundation pipe and the positioning projections of the foundation pipe are fixed in the positioning means of the anode retainer, in particular in a force-locking way.

In addition this object is achieved through a cathodic corrosion protection device for foundation pipes of offshore wind power plants, comprising: at least one anode retainer according to one of the claims 1 to 6, at least one anode arranged on the at least one anode retainer, a protective current unit which is connected between the at least one anode and a foundation pipe for positive charging of the at least one anode and for negative charging of the foundation pipe.

Finally this object is achieved through an offshore wind power plant with at least one foundation pipe and with a cathodic corrosion protection device according to one of the claims 12 to 14, wherein the cathodic corrosion protection device comprises for each foundation pipe an anode retainer, preferably precisely one anode retainer.

The outside of the cylinder ring is advantageously provided in the anode retainer with an essentially non-electrically-conductive coating. The distance of the anodes from the foundation pipe can thereby be reduced without producing a short circuit in the system.
Through the coating an insulation layer is created which shields the electric field against the foundation pipe and thus facilitates a reduction of the distance.

The cylinder ring is advantageously provided with passage holes in its outside. Through said passage holes the electric field' can also extend in the region between the cylinder ring and foundation pipe and thus also guarantee corrosion protection here.
The holes are advantageously selected in their size and arrangement so that the electric field can
3 extend only to the extent that is necessary for corrosion protection in the region. between the cylinder ring and the foundation pipe.

According to a particular embodiment of the invention the positioning means are formed by guide plates arranged on the inside of the cylinder ring.

It can thereby be provided in particular that the positioning means comprise tapering guide paths. In addition a fit for a respective positioning projection on the foundation pile is advantageously provided at the narrow ends of the guide paths.

The plurality of positioning projections are advantageously arranged in the foundation pipe in a first plane and in a second plane in the longitudinal direction of the foundation pipe.

It can thereby be provided in particular that the positioning projections are offset in the first plane in relation to the positioning projections in the second plane in the peripheral direction.

At least one of the positioning projections usefully comprises in the second plane a stop surface perpendicular to the longitudinal axis of the foundation pipe.

According to a particular embodiment a corrosion state detection device for automatic corrosion state detection of the foundation pipe is provided in the cathodic corrosion protection device.

Even more preferably a control device is also provided for controlling the protective current unit in dependence upon the results of the corrosion state detection through the device for automatic corrosion state detection.

The invention is based upon the surprising recognition that through the special design of the anode retainer an arrangement of anodes, distributor boxes, cables and reference electrodes can be installed or fixed below the water level, for example 20 m below the water level, without the use of divers on a foundation pipe of an offshore wind power plant.
4 While according to the prior art the arrangement of anodes is necessary on two annular planes of a foundation pipe, at least in a preferred embodiment of the cathodic protection device according to the invention the arrangement of anodes on one annular plane can suffice.

Further features and advantages of the invention follow from the attached claims and the following description, in which an example embodiment is explained in detail using the schematic drawings, in which:

Fig. 1 shows a side view of an offshore wind power plant with a cathodic corrosion protection device according to a particular embodiment of the invention;

Fig. 2 an installation schema of the cathodic corrosion protection device of the offshore wind power plant of Fig. 1;

Fig. 3 the inside of the winding of the cylinder ring of an anode retainer of the cathodic corrosion protection device of the offshore wind power plant of Fig. 1;

Figs. 4 and 5 steps for placing or pushing a cylinder ring onto a foundation pipe of the offshore wind power plant of Fig. 1 under the effect of gravity;

Fig. 6 the outside of the winding of the cylinder ring of an anode retainer of the cathodic corrosion protection device of the offshore wind power plant of Fig. 1 with fixed anodes; and Fig. 7 a detailed view of Fig. 6 with indicated inside.

Fig. 1 shows a side view of an offshore wind power plant 10 which is installed on the seabed 12. Said offshore wind power plant 10 consists essentially of a foundation 14, a tower 16 and a hub 18 with rotor vanes 20. Said foundation 14 is a so-called "tri-pile", which comprises a supporting cross 22 and three foundation pipes 24. Said foundation pipes 24 are rammed into the seabed 12. An anode retainer 28 is concentrically arranged below the water level 26 around each foundation pipe 24 on the same plane.

Said anode retainer 28 comprises a 3-metre-high cylinder ring made of steel.
The outside 32 of the winding of the cylinder ring 30 is shown in Fig. 6. As follows from this, three anodes 34, 36 and 38 are arranged equidistantly over the periphery of the cylinder ring 30 and horizontally arranged in the installation state. Said anodes 34, 36 and 38 are connected via respective cables 40, 42 and 44 to a distributor box 46 which is in turn electrically connected via a respective cable 48 to a protective current unit 50 with an integrated control device (not shown) (see also Fig. 2). As also follows by reference to Fig. 2, two types of reference electrodes are provided for controlling and monitoring the cathodic corrosion protection device 49 which includes inter alia the anode retainers 28 with respectively three anodes 34, 36 and 38 and the protective current unit 50. On the one hand it is thereby a question of two control electrodes 55 and 57 which are provided in tubular containers (not shown) on a pier 52 (see Fig. 1) and on the other hand monitoring electrodes 54, 56 and 58 which are arranged in the vicinity of the respective distributor box 46 or even therein.

As follows from Figs. 3 and 6, the cylinder ring 30 comprises passage holes 60 in its outside 32 which have a diameter of 100 mm and are arranged at a distance a of mm in the longitudinal direction and at a distance b of 909 mm in the peripheral direction.

As further follows from Figs. 3 and 7, conically pointed guide plates 64 are welded on the inside 62 of the cylinder ring 30. At the narrow ends of the guide paths 66 resulting through the guide plates 64 a respective fit 68 is provided for a respective positioning projection (see Figs. 4 and 5). The positioning projections 70 are arranged in two planes in the longitudinal direction of the foundation pipe 24 (see Figs. 4 and 5).
The positioning projections 70 in the upper plane after installation (also called the first plane) have two functions. The first function consists in the self-positioning of the cylinder ring 30 under the effect of gravity. The positioning takes place in that the diagonally extending guide plates 64 welded to the inside 62 of the cylinder ring 30 slide on said positioning projections 70 in the upper plane. The cylinder ring 30 is thereby set in rotation depending upon the initial arrangement and allowed to slide into the provided position under the effect of gravity. The second function of the positioning projections 70 in the upper plane consists in the, preferably force-locking, fixing of the cylinder ring 30 against rotation in that the positioning projections 70 slide in the upper plane in the upper region of the cylinder ring into the fit 68. The lower plane (also called the second plane) of the positioning projections 70 serves as a support in vertical direction. For this purpose the positioning projections 70 comprise in the lower plane a stop surface 72 perpendicular to the longitudinal axis of the foundation pipe 24. As the positioning projections 70 are formed outwardly conically in the lower plane, a wedging of the cylinder ring 30 in horizontal direction takes place in the installation state.

The metallic cylinder ring 30 comprises on its outside 22 an essentially non-electrically-conductive coating (for example made of Derakane 8090 epoxy vinyl ester resin).

The cathodic corrosion device 49 is a device for cathode protection with predefined current (Impressed Current Cathodic Protection - ICCP). By means of the various electrical parameters such as voltage, field strength, power, the mode of functioning of the corrosion protection device can be monitored and correspondingly adjusted.
The field strength can be measured through the reference electrodes.

The features of the invention disclosed in the present description, in the drawings and in the claims can be essential both individually and also in any combinations for the realisation of the invention in its different embodiments.

Claims (15)

Claims
1. Anode retainer (28) for cathodic corrosion protection devices (49) of foundation pipes (24) of offshore wind power plants (10), comprising:

a metallic cylinder ring (30) with a longitudinal axis and an outside (32) and an inside (62), wherein a plurality of positioning means are provided on the inside (62) around the periphery for, in particular tool-free, concentric self-positioning and, in particular force-locking, fixing of the cylinder ring (30) on a foundation pipe under the effect of gravity while interacting with corresponding positioning projections (70) located on the outside (32) of the foundation pipe (24).
2. Anode retainer (28) according to claim 1, characterised in that the outside (32) of the cylinder ring (30) is provided with an essentially non-electrically-conductive coating.
3. Anode retainer (28) according to claim 1 or 2, characterised in that the cylinder ring (30) is provided with passage holes (60) in its outside (32).
4. Anode retainer (28) according to one of the preceding claims, characterised in that the positioning means are formed by guide plates (64) arranged on the inside (62) of the cylinder ring (30).
5. Anode retainer (28) according to one of the preceding claims, characterised in that the positioning means comprise tapering guide paths (66).
6. Anode retainer (28) according to claim 5, characterised in that a fit (68) for a respective positioning projection (70) on the foundation pipe (24) is provided at the narrow ends of the guide paths (66).
7. Foundation pipe (24) of an offshore wind power plant (10), characterised in that a plurality of positioning projections (70) are provided on the outside (32) over a cylinder ring region.
8. Foundation pipe (24) according to claim 7, characterised in that the plurality of positioning projections (70) are arranged in a first plane and in a second plane in the longitudinal direction of the foundation pipe (24).
9. Foundation pipe (24) according to claim 8, characterised in that the positioning projections (70) in the first plane are offset in relation to the positioning projections (70) in the second plane in the peripheral direction.
10. Foundation pipe (24) according to claim 8 or 9, characterised in that at least one of the positioning projections (70) comprises in the second plane a stop surface (72) perpendicular to the longitudinal axis of the foundation pipe (24).
11. Connecting structure between a foundation pile of an offshore wind power plant (10) according to one of claims 7 to 10 and an anode retainer (28) according to one of claims 1 to 6, wherein the anode retainer (28) is arranged concentrically around the foundation pipe (24) and the positioning projections (70) of the foundation pipe (24) are fixed in the positioning means of the anode retainer (28), in particular in a force-locking manner.
12. Cathodic corrosion protection device (49) for foundation pipes (24) of offshore wind power plants (10), comprising:

- at least one anode retainer (28) according to one of the claims 1 to 6, - at least one anode (34, 36, 38) arranged on the at least one anode retainer (28), - a protective current unit (5) which is connected between the at least one anode and a foundation pipe for positive charging of the at least one anode and for negative charging of the foundation pipe (24).
13. Cathodic corrosion protection device (49) according to claim 12, characterised in that a corrosion state detection device is provided for automatic corrosion state detection of the foundation pile.
14. Cathodic corrosion protection device (49) according to claim 13, characterised in that a control device is provided for controlling the protective current unit (50) in dependence upon the results of the corrosion state detection through the device for automatic corrosion state detection.
15. Offshore wind power plant (10) with at least one foundation pipe (24) and with a cathodic corrosion protection device (49) according to one of the claims 12 to 14, wherein the cathodic corrosion protection device (49) comprises for each foundation pipe (24) an anode retainer (28), preferably precisely one.
CA2778376A 2009-10-28 2010-10-14 Anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, foundation pipe of an offshore wind power plant and connecting structure between them, cathodic corrosion protection device for foundation pipes of offshore wind power plants and offshore wind power plant Abandoned CA2778376A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09013547.6 2009-10-28
EP09013547A EP2317123A1 (en) 2009-10-28 2009-10-28 Anode holder for cathodic anti-corrosion devices of foundation posts of off-shore wind energy devices, foundation post of an off-shore wind energy device and connection structure between same, cathodic anti-corrosion device of foundation posts of off-shore wind energy devices and off-shore wind energy device
PCT/DE2010/001214 WO2011050770A1 (en) 2009-10-28 2010-10-14 Anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind turbines, foundation pipe of an offshore wind turbine and connecting structure therebetween, cathodic corrosion protection device for foundation pipes of offshore wind turbines, and offshore wind turbine

Publications (1)

Publication Number Publication Date
CA2778376A1 true CA2778376A1 (en) 2011-05-05

Family

ID=41319909

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2778376A Abandoned CA2778376A1 (en) 2009-10-28 2010-10-14 Anode retainer for cathodic corrosion protection devices of foundation pipes of offshore wind power plants, foundation pipe of an offshore wind power plant and connecting structure between them, cathodic corrosion protection device for foundation pipes of offshore wind power plants and offshore wind power plant

Country Status (7)

Country Link
US (1) US20120282035A1 (en)
EP (1) EP2317123A1 (en)
JP (1) JP2013509520A (en)
KR (1) KR20120100950A (en)
CN (1) CN102597500A (en)
CA (1) CA2778376A1 (en)
WO (1) WO2011050770A1 (en)

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Also Published As

Publication number Publication date
WO2011050770A8 (en) 2011-07-21
CN102597500A (en) 2012-07-18
EP2317123A1 (en) 2011-05-04
KR20120100950A (en) 2012-09-12
WO2011050770A1 (en) 2011-05-05
JP2013509520A (en) 2013-03-14
US20120282035A1 (en) 2012-11-08

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EEER Examination request

Effective date: 20151014

FZDE Discontinued

Effective date: 20171016