Connecting buckle for pultrusion plate of wind power blade

Abstract

The invention discloses a connecting buckle for a pultrusion plate of a wind power blade. Comprising an upper limiting plate and a lower limiting plate; the upper limiting plate and the lower limiting plate are parallel and are fixedly connected through a connecting plate, so that the cross sections of the connecting plate, the upper limiting plate and the lower limiting plate form an I shape. Besides the I-shaped connecting buckle, the Z-shaped connecting buckle is also arranged, and the two connecting buckles have the same function. The I-shaped connecting buckles or the B-shaped connecting buckles can be placed in the stacking area when the pultrusion beam is assembled, the interlayer stacking defect caused by scattering or shrinking due to different molded surfaces when the pultrusion plate is assembled or after a main mold is hung is prevented, and the influence on the mechanical property of the wind power blade is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pultruded plates, and in particular to a connecting buckle for a pultruded plate of a wind turbine blade. Background Art

[0002] The pultruded main beam of the wind turbine blade is assembled from pultruded plates with a specification of 120mm*5mm. For example, a 100-meter-class blade usually needs to assemble 15-20 layers. Since the main mold of the blade has many special-shaped surfaces, the pultruded plates are cut to form regular long strips of plates. The existing assembly method is to lay a layer of pultruded plate and then overlap and lay another layer, with each adjacent two pultruded plates aligned. However, when the pultruded plates are assembled or the main mold is hoisted, there are pultruded plate groups in the special-shaped area that are not uniformly scattered or shrunken, causing interlayer stacking defects, that is, after the special-shaped surface of the main mold is deformed, the two ends of the adjacent pultruded plates are misaligned, which affects the mechanical properties of the wind turbine blade. This problem is an irreparable defect, and the manufacturers of wind turbine blades have caused product scrapping or process rework problems due to this defect. Therefore, there is a lack of special fasteners, clips and other connectors for the ends of the pultruded plates of wind turbine blades. Summary of the invention

[0003] Aiming at the defects in the prior art, the probability of interlayer stacking problems in pultruded plates is reduced, and the yield rate of wind blades is improved. The present invention provides a connection buckle for pultruded plates of wind turbine blades; it includes an upper limit plate and a lower limit plate; the upper limit plate and the lower limit plate are parallel and fixedly connected by a connecting plate, so that the cross-section of the connecting plate, the upper limit plate and the lower limit plate forms an I-shaped shape.

[0004] Preferably, the connecting plate is perpendicular to the upper limit plate and the lower limit plate, respectively. The connecting edges between the connecting plate and the upper limit plate and the connecting edges between the connecting plate and the lower limit plate are both provided with rounded corners. The vertical relationship of the connecting plate, the upper limit plate and the lower limit plate can fit with the end surface of the pultruded plate, and the rounded corner design can achieve seamless fitting, making the connection between the two adjacent pultruded plates more firm and not easy to misalign.

[0005] Preferably, the connecting plate is located in the middle of the upper limit plate and the middle of the lower limit plate, and the connecting plate, the upper limit plate and the lower limit plate are integrally formed. The material of the limit plate is the same as the main mold material of the wind turbine blade, usually glass fiber cloth or epoxy resin. The material is light in weight and strong in strength, and is manufactured using an integral molding process to ensure the connection strength of the pultruded plate joint.

[0006] Preferably, the upper limit plate and the lower limit plate are symmetrically distributed on both sides of the connecting plate.

[0007] Preferably, the upper limit plate and the lower limit plate are of the same size and both have a length and width of 25 mm×40 mm; the distance between the upper limit plate and the lower limit plate is 7 mm.

[0008] The beneficial effect of this device is that after a pultruded plate is laid in the main mold of the wind turbine blade, the end face of the pultruded plate is inserted into a slot on one side of an I-shaped connecting buckle, and then another pultruded plate is laid, and one end face of this pultruded plate is inserted into the slot on the other side of the I-shaped connecting buckle, so that the two opposite end faces of the two pultruded plates are more firmly connected. In the process of hoisting the main mold, the pultruded plate group in the special-shaped area is synchronously spread out or synchronously shrunk, thereby effectively repairing the defects of stacking and misalignment of the layers at the end of the pultruded plate.

[0009] The present invention also provides another connecting buckle for a wind turbine blade pultruded plate, comprising an upper limit plate, an intermediate limit plate and a lower limit plate, wherein the upper limit plate, the intermediate limit plate and the lower limit plate are fixedly connected in sequence, and the upper limit plate and the lower limit plate are both perpendicular to the intermediate limit plate, thereby forming an U-shaped cross-section of the upper limit plate, the intermediate limit plate and the lower limit plate.

[0010] Preferably, the inner side edge of the connection between the upper limit plate and the middle limit plate and the inner side edge of the connection between the lower limit plate and the middle limit plate are both provided with rounded corners.

[0011] Preferably, the upper limit plate, the middle limit plate and the lower limit plate are integrally formed, and the materials of the upper limit plate, the middle limit plate and the lower limit plate are all glass fiber cloth or epoxy resin.

[0012] The beneficial effects of this equipment are reflected in the following aspects: the connection method of the B-shaped connecting buckle is similar to that of the I-shaped connecting buckle. After laying a pultruded plate, a B-shaped connecting buckle is connected to its end face, and then another pultruded plate is laid. The end faces of the two pultruded plates are located on both sides of the middle limit plate. The pultruded plate on the left side of the middle limit plate fits the lower surface of the upper limit plate, and the pultruded plate on the right side of the middle limit plate fits the upper surface of the lower limit plate. The function of the B-shaped connecting buckle is the same as that of the I-shaped connecting buckle, both of which are to strengthen the connection between the end faces of two adjacent pultruded plates and reduce the probability of misalignment and overlapping defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0014] Figure 1 It is a structural schematic diagram of embodiment 1;

[0015] Figure 2 for Figure 1 Bottom view

[0016] Figure 3 for Figure 2 Sectional view along AA direction;

[0017] Figure 4 It is a structural schematic diagram of the second embodiment;

[0018] Figure 5 for Figure 4 Stereoscopic diagram.

[0019] In the accompanying drawings, embodiment 1 includes an upper limit plate 1 , a lower limit plate 2 , a connecting plate 3 , a fillet 4 , and a slot 5 .

[0020] Embodiment 2: upper limit plate 6, middle limit plate 7, lower limit plate 8, and rounded corner 9. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0022] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0023] Embodiment 1:

[0024] like Figure 1 As shown, embodiment 1 provides a connection buckle for a pultruded plate of a wind turbine blade, comprising an upper limit plate 1 and a lower limit plate 2. The upper limit plate 1 and the lower limit plate 2 are parallel and fixedly connected by a connecting plate 3, and the connecting plate 3 is perpendicular to the upper limit plate 1 and the lower limit plate 2, respectively, so that the cross-section of the connecting plate 3, the upper limit plate 1 and the lower limit plate 2 forms an I-shaped shape. Specifically, the connecting plate 3 is located in the middle of the upper limit plate 1 and the middle of the lower limit plate 2, so that the upper limit plate 1 and the lower limit plate 2 are symmetrically distributed on both sides of the connecting plate 3.

[0025] In addition, the connecting edges between the connecting plate 3 and the upper limit plate 1 and the connecting edges between the connecting plate 3 and the lower limit plate 2 are provided with fillets 4. The vertical relationship between the connecting plate 3, the upper limit plate 1 and the lower limit plate 2 can fit with the end surface of the pultruded plate, and the fillet 4 design can achieve seamless fitting, making the connection between the two adjacent pultruded plates more firm and not easy to misalign.

[0026] In this embodiment, the connection plate 3, the upper limit plate 1 and the lower limit plate 2 are integrally formed, and the material is the same as the main mold material of the wind turbine blade, usually glass fiber cloth or epoxy resin. This material is light in weight and strong in strength, and is manufactured using an integral molding process to ensure the connection strength of the pultruded plate joint.

[0027] Since the size of the pultruded board is strictly customized according to the industry standard, in order to keep consistent with the size of the pultruded board, the upper limit plate 1 and the lower limit plate 2 in this embodiment are the same size and the length and width are both 25mmX40mm, and the distance between the upper limit plate 1 and the lower limit plate 2 is 7mm. That is, the longitudinal width of the slots 5 on both sides of the I-shaped connecting buckle is 7mm, ensuring that the pultruded board can be easily stuck in the slots 5.

[0028] This embodiment also provides a method for assembling a pultruded plate: after laying a pultruded plate in the main mold of the wind turbine blade, the end face of the pultruded plate is inserted into a slot 5 on one side of an I-shaped connecting buckle, and then another pultruded plate is laid, and one end face of this pultruded plate is inserted into the slot 5 on the other side of the I-shaped connecting buckle, so that the two opposite end faces of the two pultruded plates are more firmly connected. In the process of hoisting the main mold, the pultruded plate group in the special-shaped area is synchronously dispersed or synchronously shrunk, thereby effectively repairing the defects of stacking and misalignment of the layers at the end of the pultruded plate.

[0029] Embodiment 2:

[0030] like Figure 1 As shown, Embodiment 2 provides another connection buckle for a pultruded plate of a wind turbine blade, including an upper limit plate 6, an intermediate limit plate 7 and a lower limit plate 8. The upper limit plate 6, the intermediate limit plate 7 and the lower limit plate 8 are fixedly connected in sequence, and the upper limit plate 6 and the lower limit plate 8 are perpendicular to the intermediate limit plate 7, so that the cross-section of the upper limit plate 6, the intermediate limit plate 7 and the lower limit plate 8 forms a Y-shaped shape. The upper limit plate 6, the intermediate limit plate 7 and the lower limit plate 8 are integrally formed, and the material is the same as the main mold material of the wind turbine blade, which is glass fiber cloth or epoxy resin.

[0031] In order to make the end face of the pultruded plate in close contact with the B-shaped connection buckle, the inner side edge of the connection between the upper limit plate 6 and the middle limit plate and the inner side edge of the connection between the lower limit plate 8 and the middle limit plate are provided with rounded corners 9. The specific installation method is as follows:

[0032] After a pultruded plate is laid in the main mold of the wind turbine blade, an I-shaped connecting buckle is connected to its end face, and then another pultruded plate is laid, and the end faces of the two pultruded plates are located on both sides of the middle limit plate 7. The pultruded plate on the left side of the middle limit plate 7 is fitted with the lower surface of the upper limit plate 6, and the pultruded plate on the right side of the middle limit plate 7 is fitted with the upper surface of the lower limit plate 8. The function of the I-shaped connecting buckle is the same as that of the I-shaped connecting buckle, both of which are to strengthen the connection between the end faces of two adjacent pultruded plates and reduce the probability of misalignment and overlapping defects.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A connection buckle for a pultruded plate of a wind turbine blade; characterized by: It includes an upper limit plate and a lower limit plate; the upper limit plate and the lower limit plate are parallel and fixedly connected by a connecting plate, so that the cross section of the connecting plate, the upper limit plate and the lower limit plate forms an I-shaped shape.

2. A connection buckle for a pultruded plate of a wind turbine blade according to claim 1, characterized in that: The connecting plates are respectively perpendicular to the upper limit plate and the lower limit plate.

3. The connection buckle for a pultruded plate of a wind turbine blade according to claim 1, characterized in that: The connecting edge between the connecting plate and the upper limit plate, and the connecting edge between the connecting plate and the lower limit plate are both provided with rounded corners.

4. The connection buckle for a pultruded plate of a wind turbine blade according to claim 1, characterized in that: The connecting plate is located at the middle of the upper limit plate and the middle of the lower limit plate, and the connecting plate, the upper limit plate and the lower limit plate are integrally formed.

5. The connection buckle for a pultruded plate of a wind turbine blade according to claim 1, characterized in that: The upper limit plate and the lower limit plate are symmetrically distributed on both sides of the connecting plate.

6. The connection buckle for a pultruded plate of a wind turbine blade according to claim 4, characterized in that: The upper limit plate and the lower limit plate are the same in size and both have a length and width of 25mmX40mm; the distance between the upper limit plate and the lower limit plate is 7mm.

7. A connecting buckle for a pultruded plate of a wind turbine blade, characterized in that: It includes an upper limit plate, a middle limit plate and a lower limit plate, which are fixedly connected in sequence, and the upper limit plate and the lower limit plate are perpendicular to the middle limit plate, so that the cross-section of the upper limit plate, the middle limit plate and the lower limit plate forms a Y-shaped shape.

8. The connecting buckle for a pultruded plate of a wind turbine blade according to claim 7, characterized in that: The inner side edge of the connection between the upper limit plate and the middle limit plate and the inner side edge of the connection between the lower limit plate and the middle limit plate are both provided with rounded corners.

9. The connecting buckle for a pultruded plate of a wind turbine blade according to claim 7, characterized in that: The upper limit plate, the middle limit plate and the lower limit plate are integrally formed.

10. The connecting buckle for a pultruded plate of a wind turbine blade according to claim 7, characterized in that: The upper limit plate, the middle limit plate and the lower limit plate are all made of glass fiber cloth or epoxy resin.

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