DE102012103262A1 - Color coating part for partial surfaces of concrete shaft of off-shore wind energy plant, has films comprising anchoring elements e.g. bar profiles, on side turned towards concrete, where anchoring elements are embedded in concrete - Google Patents

Abstract

The coating part has high pressure polyethylene or polypropylene protective films (1) dyed in desired colors and formed in 2 millimeter thickness, where the coating part protects a concrete (7) from weathering. The films comprise anchoring elements (2) e.g. bar profiles, on a side turned towards the concrete. The anchoring elements are embedded in the concrete. The films are connected to a surface piece. The films are designed in 2 to 10 millimeters thickness and 3 to 6 millimeters thickness. The bar profiles are arranged in parallel.

Description

Technical area

The invention relates to the external protection and the identification of shafts of offshore wind turbines.

State of the art

The guidelines of the WSDen and the WSV for Traffic Engineering (FVT) for the Design, Labeling and Operation of Offshore Wind Farms stipulate that the optical day marking of a yellow paint of the tower shaft of the offshore wind energy plants up to a height 15 m above (HAT) high water level.

In order to make this label sufficiently resistant to weathering, it must be applied in several layers. However, repairs to the coatings are still due and are possible offshore only in suitable weather conditions and with great technical effort.

Object of the invention

The object of the invention is to color-characterize the concrete parts of an offshore wind turbine and at the same time to protect against the prevailing aggressive weathering there.

Specifically, it should mark the concrete made of shank part of the foundation of an offshore wind turbine or a short stem foundation separately attached concrete shank part at least in the legally required range up to a height of 15 m above (HAT) flood level on the one hand long-term color, on the other hand even there the material protect the shaft itself better than previously proposed against the particularly aggressive in the offshore area weathering (wind, salt, waves, sun, vegetation).

Presentation of the invention

The object is solved by the features specified in the characterizing part of claim 1.

For this purpose, the area of the concrete mast part ( 13 ) up to a height of 15 m above (HAT) flood level according to the invention no conventional

Color coating, but one anchored to the shank concrete PE film (polyethylene film) ( 1 ), preferably an HD-PE film (high-pressure polyethylene film, but other weatherproof and dyeable plastics are also possible, eg polypropylene (PP).

The foil ( 1 ) consists of at least 2 millimeters thick, preferably 2 to 10 millimeters, more preferably 3 to 6 and most preferably about 4 mm thick polyethylene plates with back anchoring elements ( 2 ). The anchoring elements can consist of parallel webs (web profiles) ( 2 ) or consist of individual, finger-like profiles.

The foil ( 1 ) but does not necessarily have to be constructed of individual plates, but it can also come from "the role". However, plates can be handled better at the given thickness.

The foil ( 1 ) is colored according to the requirements, eg yellow. The individual panels are produced in different sizes and can be welded together or by means of special joint profiles ( 3 . 4 . 6 . 8th ) and thus joined together to form a large-area film. PE-HD panels are successfully used in power plant, landfill and wastewater treatment plants due to their resistance. Also in the industrial sector, such. As the oil industry, PE-HD plates find their use.

Welding PE is common joining technology. The most commonly used welding methods are heating element sleeve welding, butt welding and hot gas extrusion welding. These methods or other known in the art connection method for PE plates, are also used for the production of the shaft coating according to the invention.

In hot gas extrusion welding, the usual process in film production and plate processing, a PE granulate is heated. The materials to be joined are heated with warm gas and homogeneously fused together with the granules. The shape of the weld ( 5 ) is produced as needed with so-called welding shoes.

In the 1 For example, some material parameters are listed for a PE plate suitable for carrying out the invention.

The connection of the foils can be done at the construction joints via special profiles ( 3 . 4 . 6 . 8th ) or folds. In the 2 (Excerpt from the product range of a company) are shown some examples of connections at the plate edges, as well as their suitable dimensions (in millimeters).

The film according to the invention ( 1 ) fulfills two technical purposes simultaneously:
Signal effect and protective effect.

Since the film with its (for example) traffic yellow color for the prestressed concrete shaft ( 13 ) has a signal effect, the following properties of the

Materials in the foreground:
Color fastness and color stability (supervisory colors), tear resistance, impact resistance, weathering or aging resistance (resistance to UV rays, seawater change stress, thermal cycling and freeze-thaw stress).

Although the film ( 1 ) the underlying concrete ( 7 ), the concrete cover of the mast part covered with it ( 13 ) preferably not lowered below the level that would be allowed without cover. The permissible concrete cover is therefore preferred despite installation of the film ( 1 ) to outer edge of concrete ( 7 ) or inner edge of film ( 1 ).

In the case of a concrete shank ( 13 ) of a gravity foundation this example is made in climbing construction, so that, for example, every approximately 4.50 m creates a working joint. The foil ( 1 ) is in such a manufacturing process in the outer circular formwork ( 10 ) and held by means of vacuum, a clamping device or temporary Schraubfixierung on the formwork.

The vertical section joints of the film can be connected via so-called plug connectors or connection strips ( 4 ) getting closed. Optionally, it is possible to additionally weld the vertical joint. Since this is not technically necessary and the welding operations are weather-dependent, this is dispensed with in a preferred embodiment.

3a shows interconnecting PE films bonded. Shown are web profiles embedded in concrete. (There is no bar on the groove profile in this version.)

3b shows the same embodiment, but additionally welded.

The thus occupied outer formwork ( 10 ) is then lifted over the finished armored inner formwork and stretched close to the already concreted last bar of the shaft. Due to the pressure generated during concreting, the film is completely flat outwards against the formwork ( 10 ).

It is technically possible to weld the horizontal joints later, but this is not absolutely necessary and is therefore not in the later construction, due to the weather dependence, preferably not provided.

4 shows the horizontal joint formation and the welding ( 5 ) on a horizontal joint.

4a shows the installation of a Einsteckprofiles ( 8th ) as a sleeve profile (here without webs), which under the later sealing tape ( 6 ) bridges the joint during the manufacturing process of the concrete part ( 13 ). The insert profile ( 8th ) (preferably of the same material as the film ( 1 )) is on the formwork skin ( 10 ) temporarily fixed (eg simply with Spax screws ( 9 ) through corresponding holes in the formwork skin ( 10 ) through). The figure shows at the bottom an already finished concrete part and at the top again the attached climbing formwork ( 10 ). The bar profiles ( 2 ) on the film ( 1 ) are different here than in 3a and 3b vertical.

4b shows a gap in the final state after the optional welding of the horizontal sealing strip ( 6 ) with the film ( 1 ) in front of the male profile ( 8th ).

On the components for boat landing and ladder the foil ( 1 ) interrupted, here the film does not surround the shaft so all around. This is necessary so that the built-in parts are exposed and the Secondary Steel can be mounted. The attachments made of steel are also in the desired color, eg traffic yellow, coated.

The 5 shows the with foil ( 1 ) occupied shaft ( 13 ) in two views 5a and 5b (perspective). You can see that the shaft ( 13 ) here on the surfaces, where the ladder leads upwards, not with foil ( 1 ) is covered. Because the film ( 1 ) but was not added to the concrete cover against corrosion, is the shaft ( 13 ) at this point still sufficiently protected.

Markings and inscriptions on the colored (eg traffic yellow) surface are preferably made permanently by welding the letters and numbers / symbols ( 12 ) on the already installed film ( 1 ). In the 6 is shown a possibility of welding. The approach was that the label to be executed ( 12 ) as black PE-HD foil panel before installation on the formwork ( 10 ) with yellow PE-HD carrier plate ( 1 ) is welded. This can also be prepared at the factory during assembly. The welding ( 12 ) the characters ( 12 ) completely circumferential (advantage: less wind attack surface) or even discontinuous only partially executed.

Please note that if possible the label ( 12 ) should not be provided in the area of the construction joints or the pile joints.

In order to achieve a high production rate of shaft-bearing-supporting foundations or shank parts ( 13 ), it is necessary to optimize the individual production processes in order to minimize the necessary production sites. The installation of a PE-HD film ( 1 ) can be integrated into the concreting process in such a way that almost no time-related additions have to be taken into account in the production, since the preparatory work (evidence of the formwork with the film) parallel to the production of the shank ( 13 ) can be performed. So this solution is the first choice.

The application of a conventional coating, however, caused about 5 to 7 different steps with the associated drying or curing times. This would result in about 6 to 7 more working days in the production of the shaft ( 13 ), because these works can not be integrated into the actual process. Added to this would be the dependence on the weather, since the usual coating products should not be processed below + 5 ° C and some operations (eg the blasting of the concrete) caused a separate enclosure of the surfaces.

Experiments have shown that not only the mechanical qualities of the film ( 1 ) weathering in the offshore area, but also the color stability of the films ( 1 ) given is. The supervisory color after weathering differs only slightly from the supervisory color when new.

The planned in mass production according to embodiments of the invention PE-HD film ( 1 ) has all the features that ensure carefree and safe operation of the wind turbines.

In particular, the great resistance to all offshore stresses characterizes the use of the film in the inventive use. In addition, it is possible to 1 ) to polish in the event of color changes that may occur and thus make the original color visible again, since the color is contained in the entire layer thickness of several millimeters and not only on the surface of the film ( 1 ). In contrast to conventional coatings, this work can also be carried out under offshore conditions.

LIST OF REFERENCE NUMBERS

1

 Foil (preferably composed of plates)

2

 Anchoring element, e.g. web profile

3

 groove profile

4

 connecting strips

5

 Weld

6

 Sealing bandage on horizontal joint (made of PE-HD, for example)

7

 concrete

8th

 in profile

9

 Fixation of the insertion profile (eg Spax screw)

10

 scarf skin

11

 Tying the formwork

12

 Writing or signs / symbols

13

 shaft

14

 Weld between sign and foil (continuous or discontinuous)

Claims (8)

Coating ( 1 ) for at least part surfaces of the concrete part ( 13 ) of an offshore wind turbine, characterized in that it covers the concrete covered by it ( 7 ) protects against weathering and at the same time color-coded and that for this purpose they consist of PE sheets or PP sheets (polyethylene or polypropylene sheets) which are continuously colored in the desired color ( 1 ) of at least 2 millimeters thickness and that these plates ( 1 ) on its concrete side anchoring elements ( 2 ) in the concrete ( 7 ) are embedded. Coating ( 1 ) according to claim 1, characterized in that a plurality of plates ( 1 ) are connected to a patch. Coating ( 1 ) according to at least one of claims 1 and 2, characterized in that it is the coating of at least a partial surface of the shank ( 13 ) of the offshore wind turbine. Coating ( 1 ) according to at least one of claims 1 to 3, characterized in that the plates ( 1 ) Are 2 to 10 millimeters thick. Coating ( 1 ) according to claim 4, characterized in that the plates ( 1 ) Are 3 to 6 millimeters thick. Coating ( 1 ) according to at least one of claims 1 to 5, characterized in that it is high-pressure polyethylene plates (HD-PE plates) ( 1 ). Concrete part ( 13 ) of an offshore wind turbine, characterized in that it is in parts of its visible area with the coating ( 1 ) is coated according to at least one of claims 1 to 6. Concrete part ( 13 ) according to claim 7, characterized in that it is the concrete shaft ( 13 ) of an offshore wind turbine.

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