WO2023038528A1 - Clamp coupling, plate metal structure and method of coupling structural components - Google Patents

Clamp coupling, plate metal structure and method of coupling structural components Download PDF

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Publication number
WO2023038528A1
WO2023038528A1 PCT/NL2022/050515 NL2022050515W WO2023038528A1 WO 2023038528 A1 WO2023038528 A1 WO 2023038528A1 NL 2022050515 W NL2022050515 W NL 2022050515W WO 2023038528 A1 WO2023038528 A1 WO 2023038528A1
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WO
WIPO (PCT)
Prior art keywords
layer
structural component
components
metal plate
particles
Prior art date
Application number
PCT/NL2022/050515
Other languages
French (fr)
Inventor
Jacobus Lambertus Van Merksteijn
Original Assignee
Van Merksteijn Real Estate B.V.
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Filing date
Publication date
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Publication of WO2023038528A1 publication Critical patent/WO2023038528A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/005—Means to increase the friction-coefficient
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/40—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/16—Solid spheres
    • C08K7/18—Solid spheres inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/16—Solid spheres
    • C08K7/18—Solid spheres inorganic
    • C08K7/20—Glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
    • F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
    • F16B5/0642—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship the plates being arranged one on top of the other and in full close contact with each other
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a clamp coupling for connecting two structural components.
  • Clamp couplings as such are known, and are used to fix one structural component to another. By clamping the components together in a first direction, friction prevents the components from moving in any other direction with respect to each other, thereby fixing the components together.
  • powder coating in which a dry powder is permanently adhered to the component using a curing process involving e.g. heat or UV-radiation.
  • powder coating is superior in that powder coated components are generally less susceptible to temperature changes.
  • powder coated components can have advantageous structural properties. As such, powder coated components find application in challenging applications, such as construction of steel structures, such as wind turbine masts.
  • the current invention addresses this issue by providing a clamp coupling for connecting two structural components, comprising a first structural component and a second structural component connected to the first structural component, wherein a first surface of the first structural component or a second surface of the second structural component located at an interface between the first structural component and the second structural component is provided with a powder coating layer, wherein a layer of solid particles of a substantially chemically inert material is provided at the interface, wherein the first structural component and the second structural component are clamped together, thereby clamping the layer of solid particles in between them.
  • the layer of solid particles at least partially counteracts the detrimental effects of the powder coating with regards to the structural characteristics of the coupling.
  • including the layer of solid particles may aid in preserving or even increasing the frictional forces between the two clamped components.
  • the invention is based in part on that when a powdered component is clamped, a thin waxy layer may form along the surface of the clamped, powder coated component.
  • the solid particles may bridge the waxy layer by providing a more direct contact between the components. Accordingly, the detrimental effects of the waxy layer, which could detriment the structural properties of the coupling, are reduced or avoided using the solid particles.
  • the layer of solid particles is an additional powder layer, supplied additional to the powder coating that was already applied to the component(s).
  • the particles in the layer of solid particles according to the invention may be of another material and/or size than any particles in the coating of the powder-coated component(s).
  • the layer of solid particles may for instance be sparse, i.e. the layer may have gaps between particles.
  • the layer is a continuous, but possible porous, layer of particles.
  • the clamp coupling may be effective even when both the first surface and the second surface are provided with a powder coating layer. Accordingly, an effective coupling can be achieved even when both components are protected by a powder coating. As such, the coupling may be useful in demanding applications requiring powder coating components for protecting them from e.g. corrosion.
  • the layer of solid particles forms an additional layer of solid particles, i.e. a third layer of particles, that is different from the particles in the coating of the powder coated components.
  • the particles of the layer of solid particles comprise ZnO.
  • Zinc oxide may be used in particularly challenging applications, for instance in moist or wet environments, or applications involving temperature changes.
  • such environments include the masts of wind turbines.
  • the particles may consist substantially entirely of zinc oxide.
  • the particles of the layer of solid particles comprise glass.
  • Glass can advantageously be used due to its chemically inert properties in challenging environments. It is possible to combine zinc oxide and glass, and possibly other components as material for the solid particles. However, the particles may also consist substantially entirely of glass.
  • the particles of the layer of solid particles are fixed in a powder coating layer of the first structural component or the second structural component.
  • the particles may be provided relatively easily at the interface between the components. Moreover, it may be relatively easy to provide an even layer of particles of a desired thickness when only one component is provided with a layer of particles.
  • the particles of the layer of solid particles have a characteristic dimension corresponding to a thickness of the powder coating layer.
  • the corresponding characteristic dimension may guarantee that the particles are able to break the waxy layer and/or the powder coating layer, in order to allow a mechanical coupling of the two components via the particles, possibly without the waxy layer and/or the coating layer in between.
  • the characteristic dimension may be the diameter, or the D50 of the particles.
  • the characteristic dimension may correspond to the thickness of both layers combined.
  • Corresponding may herein be understood as between 50% smaller to 100% larger, preferably between 30% smaller and 50% larger, more preferably between 20% smaller and 20% larger, most preferably between 10% smaller or larger.
  • the first structural component and the second structural component are clamped together using bolts.
  • Bolts may be used to provide sufficient clamping force to effectively use the particles to increase friction, thereby creating an effective clamp coupling between powder coated components.
  • the invention also relates to a plate-metal structure comprising a first metal plate and a second metal plate, both of which are provided with a powder coat layer, the first and second metal plate being arranged substantially coplanar with each other, wherein the first metal plate and the second metal plate are fixed to each other by clamping to each of the first metal plate and the second metal plate a connecting component, the connecting component thereby forming a clamp coupling according to any of the preceding claims with each of the first metal plate and the second metal plate.
  • two plate-like components may be attached to each other, thereby allowing the creating of relatively large plate-like structures from relatively small components. Accordingly, the components may be manufactured offsite, and may be transported easily to construction site. As an example, plates may be prepared offsite and be assembled on-site to produce a stacked annular structure, such as a wind turbine mast.
  • two connecting components may be provided on opposing sides of the first metal plate and the second metal plate, and the two connecting components may be clamped towards each other thereby clamping the first metal plate and the second metal plate in place.
  • the invention also relates to a method of fixing at least two structural components together, wherein at least one of the at least two components is powder coated at at least the interface of the at least two structural components, wherein a layer of solid particles of a substantially chemically inert material is provided between the at least two structural components at the interface, and the at least two structural components are clamped together.
  • the method may result in a reliable coupling between the at least two structural components.
  • the method may result in the clamp coupling as described above, with any of the above-presented features or characteristics, in any suitable combination or by themselves.
  • the layer of particles may be provided on a powder coated one of the structural components before clamping the components together.
  • the clamp coupling may be made relatively easily, for instance off-site.
  • layer of particles may be applied to the powder coated structural component by softening at least a part of the powder coat layer and introducing the solid particles to the softened coating.
  • a solvent may be used to soften the coating.
  • a solvent may be able to locally soften the powder coating, thereby affecting only those parts upon which the particles are later applied. Accordingly, other parts of the powder coating may remain intact.
  • Figure 1 shows schematically a cross section of a plate metal structure
  • Figure 2A shows schematically a top view of an annular plate metal structure
  • Figure 2B shows schematically a side view of multiple stacked plate metal structures forming a mast of a wind turbine.
  • Figure 1 shows a first metal plate 1 and a second metal plate 2.
  • the metal plates 1, 2 are arranged coplanar, and are both powder coated.
  • the metal plates 1, 2 are attached by a clamp coupling, comprising two connection components 3, 4 on opposing sides of the metal plates 1, 2.
  • the metal plates are also powder coated.
  • Each connection component 3, 4 is provided with a layer of solid particles 5, 6 on a side facing the metal plates 1, 2.
  • the solid particles 5, 6 are applied in the powder coating layer of the connection components 3, 4 by softening the coating using a solvent before applying the solid particles.
  • the layer of solid particles thus applied is an extra layer, i.e. additional to the particles of the powder coating.
  • the particles of the layer of solid particles may be applied in the coatings, which themselves include particles.
  • the layer of solid particles may remain readily distinguishable by those skilled in the art, for instance due to different materials used or different particle size.
  • the solid particles comprise ZnO. Alternatively glass or a mixture of the two, or another chemically inert solid could be used.
  • the connection components 3, 4 are clamped together using bolts 7 tightened by nuts 8. Accordingly, the metal plates 1, 2 are clamped between the two connection components 3, 4 and held in place due to frictional forces at the interface of each connection component 3, 4 with each metal plate 1,
  • the layer of solid particles 5, 6 is provided at the interface between the connection components
  • FIG 2A shows a part of an annular structure 109 as atop view.
  • the annular structure 109 consists of a repeating pattern of metal plates 101, 102, which are angled.
  • the metal plates 101, 102 are connected together using connection components 103, 104 as detailed in figure 1. Due to the metal plates 101, 102 being angled, a repeating pattern of the metal plates 101, 102 results in an annular structure 109.
  • the size and amount of metal plates 101, 102 can be chosen as desired.
  • FIG 2B shows a side view of a part of a mast 110 of a wind turbine.
  • the mast is formed by multiple annulare structures 109 which are stacked.
  • Each annular structure 109 is attached to the one below and/or above using clamp couplings as described above. Connection components 103 of the clamp couplings are visible in figure 2B.
  • the amount of annular structures 109 to form the mast can be chosen as desired.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Wood Science & Technology (AREA)
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Abstract

The invention relates to a clamp coupling for connecting two structural components, comprising a first structural component and a second structural component connected to the first structural component, wherein a first surface of the first structural component or a second surface of the second structural component located at an interface between the first structural component and the second structural component is provided with a powder coating layer, wherein a layer of solid particles of a substantially chemically inert material is provided at the interface, wherein the first structural component and the second structural component are clamped together, thereby clamping the layer of solid particles in between them. The invention also relates to a plate metal structure made with such clamp couplings, and a method of making clamp couplings.

Description

CLAMP COUPLING, PLATE METAL STRUCTURE AND METHOD OF COUPLING STRUCTURAL COMPONENTS
The invention relates to a clamp coupling for connecting two structural components.
Clamp couplings as such are known, and are used to fix one structural component to another. By clamping the components together in a first direction, friction prevents the components from moving in any other direction with respect to each other, thereby fixing the components together.
In some challenging applications it is necessary to protect the structural components, especially if they are metal components such as steel, from the elements. Different protection techniques exist, one of which is applying a coating. One particular coating technique is powder coating, in which a dry powder is permanently adhered to the component using a curing process involving e.g. heat or UV-radiation. Compared to other coating techniques, powder coating is superior in that powder coated components are generally less susceptible to temperature changes. Additionally, powder coated components can have advantageous structural properties. As such, powder coated components find application in challenging applications, such as construction of steel structures, such as wind turbine masts.
Regardless, some problems arise when using powder coated components in such applications, in particular when the coated components are clamped together to form a structure. It has been found the powder coating reduces the frictional effects of the clamp coupling. The resulting structural rigidity of the clamp coupling has been found insufficient for some applications. Accordingly, a need exists to better couple powder coated components.
The current invention addresses this issue by providing a clamp coupling for connecting two structural components, comprising a first structural component and a second structural component connected to the first structural component, wherein a first surface of the first structural component or a second surface of the second structural component located at an interface between the first structural component and the second structural component is provided with a powder coating layer, wherein a layer of solid particles of a substantially chemically inert material is provided at the interface, wherein the first structural component and the second structural component are clamped together, thereby clamping the layer of solid particles in between them.
It has been found the layer of solid particles at least partially counteracts the detrimental effects of the powder coating with regards to the structural characteristics of the coupling. In particular, including the layer of solid particles may aid in preserving or even increasing the frictional forces between the two clamped components. The invention is based in part on that when a powdered component is clamped, a thin waxy layer may form along the surface of the clamped, powder coated component. The solid particles may bridge the waxy layer by providing a more direct contact between the components. Accordingly, the detrimental effects of the waxy layer, which could detriment the structural properties of the coupling, are reduced or avoided using the solid particles.
The skilled person will thus understand that since the powder coated component itself has particles in its coating layer, the layer of solid particles is an additional powder layer, supplied additional to the powder coating that was already applied to the component(s).
The particles in the layer of solid particles according to the invention may be of another material and/or size than any particles in the coating of the powder-coated component(s).
The layer of solid particles may for instance be sparse, i.e. the layer may have gaps between particles. In an alternative, the layer is a continuous, but possible porous, layer of particles.
The clamp coupling may be effective even when both the first surface and the second surface are provided with a powder coating layer. Accordingly, an effective coupling can be achieved even when both components are protected by a powder coating. As such, the coupling may be useful in demanding applications requiring powder coating components for protecting them from e.g. corrosion.
The skilled person further understands that if both components are powder coated, the layer of solid particles forms an additional layer of solid particles, i.e. a third layer of particles, that is different from the particles in the coating of the powder coated components.
In an embodiment of the clamp coupling, the particles of the layer of solid particles comprise ZnO.
Zinc oxide may be used in particularly challenging applications, for instance in moist or wet environments, or applications involving temperature changes. In particular, such environments include the masts of wind turbines.
In particular, the particles may consist substantially entirely of zinc oxide. In another embodiment of the clamp coupling, the particles of the layer of solid particles comprise glass.
Glass can advantageously be used due to its chemically inert properties in challenging environments. It is possible to combine zinc oxide and glass, and possibly other components as material for the solid particles. However, the particles may also consist substantially entirely of glass.
In yet another embodiment of the clamp coupling, the particles of the layer of solid particles are fixed in a powder coating layer of the first structural component or the second structural component.
By fixing the solid particles in the powder coating layer of one component, the particles may be provided relatively easily at the interface between the components. Moreover, it may be relatively easy to provide an even layer of particles of a desired thickness when only one component is provided with a layer of particles.
In yet another embodiment of the clamp coupler, the particles of the layer of solid particles have a characteristic dimension corresponding to a thickness of the powder coating layer.
The corresponding characteristic dimension may guarantee that the particles are able to break the waxy layer and/or the powder coating layer, in order to allow a mechanical coupling of the two components via the particles, possibly without the waxy layer and/or the coating layer in between.
The characteristic dimension may be the diameter, or the D50 of the particles.
When both components are powder coated, the characteristic dimension may correspond to the thickness of both layers combined.
Corresponding may herein be understood as between 50% smaller to 100% larger, preferably between 30% smaller and 50% larger, more preferably between 20% smaller and 20% larger, most preferably between 10% smaller or larger.
In yet another embodiment of the clamp coupling, the first structural component and the second structural component are clamped together using bolts. Bolts may be used to provide sufficient clamping force to effectively use the particles to increase friction, thereby creating an effective clamp coupling between powder coated components.
The invention also relates to a plate-metal structure comprising a first metal plate and a second metal plate, both of which are provided with a powder coat layer, the first and second metal plate being arranged substantially coplanar with each other, wherein the first metal plate and the second metal plate are fixed to each other by clamping to each of the first metal plate and the second metal plate a connecting component, the connecting component thereby forming a clamp coupling according to any of the preceding claims with each of the first metal plate and the second metal plate.
Using the connecting component, two plate-like components may be attached to each other, thereby allowing the creating of relatively large plate-like structures from relatively small components. Accordingly, the components may be manufactured offsite, and may be transported easily to construction site. As an example, plates may be prepared offsite and be assembled on-site to produce a stacked annular structure, such as a wind turbine mast.
In order to further strengthen the connection between the two metal plates, two connecting components may be provided on opposing sides of the first metal plate and the second metal plate, and the two connecting components may be clamped towards each other thereby clamping the first metal plate and the second metal plate in place.
The invention also relates to a method of fixing at least two structural components together, wherein at least one of the at least two components is powder coated at at least the interface of the at least two structural components, wherein a layer of solid particles of a substantially chemically inert material is provided between the at least two structural components at the interface, and the at least two structural components are clamped together.
The method may result in a reliable coupling between the at least two structural components. The method may result in the clamp coupling as described above, with any of the above-presented features or characteristics, in any suitable combination or by themselves.
In particular, the layer of particles may be provided on a powder coated one of the structural components before clamping the components together.
Accordingly, the clamp coupling may be made relatively easily, for instance off-site. layer of particles may be applied to the powder coated structural component by softening at least a part of the powder coat layer and introducing the solid particles to the softened coating.
Using the powder coating to use apply the particles results in a relatively elegant method, as no adhesives are needed to apply the particles.
In particular a solvent may be used to soften the coating. A solvent may be able to locally soften the powder coating, thereby affecting only those parts upon which the particles are later applied. Accordingly, other parts of the powder coating may remain intact.
The invention will be further elucidated with reference to the attached drawings, wherein:
Figure 1 shows schematically a cross section of a plate metal structure;
Figure 2A shows schematically a top view of an annular plate metal structure; and Figure 2B shows schematically a side view of multiple stacked plate metal structures forming a mast of a wind turbine.
Throughout the figures, like elements are referred to using like reference numerals. Like elements across different embodiments are referred to using reference numerals increased by 100 (one hundred).
Figure 1 shows a first metal plate 1 and a second metal plate 2. The metal plates 1, 2 are arranged coplanar, and are both powder coated. The metal plates 1, 2 are attached by a clamp coupling, comprising two connection components 3, 4 on opposing sides of the metal plates 1, 2. The metal plates are also powder coated. Each connection component 3, 4 is provided with a layer of solid particles 5, 6 on a side facing the metal plates 1, 2. The solid particles 5, 6 are applied in the powder coating layer of the connection components 3, 4 by softening the coating using a solvent before applying the solid particles. As explained above, the layer of solid particles thus applied, is an extra layer, i.e. additional to the particles of the powder coating. The particles of the layer of solid particles may be applied in the coatings, which themselves include particles. Nevertheless, the layer of solid particles may remain readily distinguishable by those skilled in the art, for instance due to different materials used or different particle size. The solid particles comprise ZnO. Alternatively glass or a mixture of the two, or another chemically inert solid could be used. The connection components 3, 4 are clamped together using bolts 7 tightened by nuts 8. Accordingly, the metal plates 1, 2 are clamped between the two connection components 3, 4 and held in place due to frictional forces at the interface of each connection component 3, 4 with each metal plate 1,
2. The layer of solid particles 5, 6 is provided at the interface between the connection components
3, 4 and the metal plates 1, 2. Due to the clamp coupling, the metal plates 1, 2 are fixed together. Figure 2A shows a part of an annular structure 109 as atop view. The annular structure 109 consists of a repeating pattern of metal plates 101, 102, which are angled. The metal plates 101, 102 are connected together using connection components 103, 104 as detailed in figure 1. Due to the metal plates 101, 102 being angled, a repeating pattern of the metal plates 101, 102 results in an annular structure 109. The size and amount of metal plates 101, 102 can be chosen as desired.
Figure 2B shows a side view of a part of a mast 110 of a wind turbine. The mast is formed by multiple annulare structures 109 which are stacked. Each annular structure 109 is attached to the one below and/or above using clamp couplings as described above. Connection components 103 of the clamp couplings are visible in figure 2B. The amount of annular structures 109 to form the mast can be chosen as desired.
Although the invention has been described-above with reference to particular examples and embodiments, the scope of the invention is not limited thereto. In fact, the invention is defined also by the attached claims.

Claims

7 Claims
1. Clamp coupling for connecting two structural components, comprising a first structural component and a second structural component connected to the first structural component, wherein a first surface of the first structural component or a second surface of the second structural component located at an interface between the first structural component and the second structural component is provided with a powder coating layer, wherein a layer of solid particles of a substantially chemically inert material is provided at the interface, wherein the first structural component and the second structural component are clamped together, thereby clamping the layer of solid particles in between them.
2. Clamp coupling according to the previous claim, wherein both the first surface and the second surface are provided with a powder coating layer.
3. Clamp coupling according to any one or more of the preceding claims, wherein the particles of the layer of solid particles comprise ZnO.
4. Clamp coupling according to any one or more of the preceding claims, wherein the particles of the layer of solid particles comprise glass.
5. Clamp coupling according to any one or more of the preceding claims, wherein the particles of the layer of solid particles are fixed in a powder coating layer of the first structural component or the second structural component.
6. Clamp coupling according to any one or more of the preceding claims, wherein the particles of the layer of solid particles have a characteristic dimension corresponding to a thickness of the powder coating layer.
7. Clamp coupling according to any one or more of the preceding claims, wherein the first structural component and the second structural component are clamped together using bolts.
8. Plate-metal structure comprising a first metal plate and a second metal plate, both of which are provided with a powder coat layer, the first and second metal plate being arranged substantially coplaner with each other, wherein the first metal plate and the second metal plate are fixed to each other by clamping to each of the first metal plate and the second metal plate a connecting 8 component, the connecting component thereby forming a clamp coupling according to any of the preceding claims with each of the first metal plate and the second metal plate.
9. Plate-metal structure according to the previous claim, wherein two connecting components are provided on opposing sides of the first metal plate and the second metal plate, and wherein the two connecting components are clamped towards each other thereby clamping the first metal plate and the second metal plate in place.
10. Method of fixing at least two structural components together, wherein at least one of the at least two components is powder coated at at least the interface of the at least two structural components, wherein a layer of solid particles of a substantially chemically inert material is provided between the at least two structural components at the interface, and the at least two structural components are clamped together.
11. Method according to claim 10, the layer of particles provided on a powder coated one of the structural components before clamping the components together.
12. Method according to claim 11, wherein the layer of particles is applied to the powder coated structural component by softening at least a part of the powder coat layer and introducing the solid particles to the softened coating.
13. Method according to claim 12, wherein a solvent is used to soften the coating.
PCT/NL2022/050515 2021-09-13 2022-09-13 Clamp coupling, plate metal structure and method of coupling structural components WO2023038528A1 (en)

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Citations (6)

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WO2008154122A1 (en) * 2007-06-12 2008-12-18 E. I. Du Pont De Nemours And Company Insulation coating composition for electrical steel
EP2075466A1 (en) * 2007-12-28 2009-07-01 Gamesa Innovation & Technology, S.L. Method for connecting a low speed main shaft of a wind turbine to an input shaft of a transmission gearbox of the wind turbine and a connection obtained by said method
US20130322804A1 (en) * 2010-12-07 2013-12-05 Skf Usa Inc. Friction-enhancing lacquer and machine part coated therewith
EP3663436A1 (en) * 2018-12-05 2020-06-10 3M Innovative Properties Company Connecting element for the friction-increasing connection of components, process for making a connecting element and use of a connecting element
EP3742002A1 (en) * 2019-05-24 2020-11-25 3M Innovative Properties Company Connecting element for the friction-increasing connection of components, process for making a connecting element and use of a connecting element

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070065668A1 (en) * 2005-09-22 2007-03-22 Akebono Brake Industry Co., Ltd. Work with multi layers coating films and method of forming multi layers coating films
WO2008154122A1 (en) * 2007-06-12 2008-12-18 E. I. Du Pont De Nemours And Company Insulation coating composition for electrical steel
EP2075466A1 (en) * 2007-12-28 2009-07-01 Gamesa Innovation & Technology, S.L. Method for connecting a low speed main shaft of a wind turbine to an input shaft of a transmission gearbox of the wind turbine and a connection obtained by said method
US20130322804A1 (en) * 2010-12-07 2013-12-05 Skf Usa Inc. Friction-enhancing lacquer and machine part coated therewith
EP3663436A1 (en) * 2018-12-05 2020-06-10 3M Innovative Properties Company Connecting element for the friction-increasing connection of components, process for making a connecting element and use of a connecting element
EP3742002A1 (en) * 2019-05-24 2020-11-25 3M Innovative Properties Company Connecting element for the friction-increasing connection of components, process for making a connecting element and use of a connecting element

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