Semi-submersible fan foundation

Abstract

The utility model provides a semi-submersible fan foundation which comprises at least three buoys, the at least three buoys are horizontally arranged, one ends of the at least three buoys are connected to form a middle supporting position, and the adjacent buoys are connected through a first steel plate. The other end of each buoy is provided with a supporting stand column. The top of each supporting stand column is provided with a second steel plate. Wherein one end of the tower drum transition section extends to the middle supporting position and is connected with the buoy, and one end of the second steel plate is connected with the tower drum transition section. According to the semi-submersible fan foundation, the bottom end of the tower transition section is directly welded to the top of the buoy, and the structural strength of the buoy is the highest in the center position, so that the supporting stability of the tower is improved, and the connecting mode of the bottom of the tower, the buoy, the supporting stand columns and the steel plates is simplified; the overall structural strength of the foundation is ensured through the supporting stand columns, the first steel plates and the second steel plates.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan foundation design technical field, concretely relates to a semi-submersible fan foundation. BACKGROUND

[0002] At present, the overall structure of the existing floating type fan foundation is complex, the steel quantity is very large, the weight is also large, and the overall cost is high, and the economy is poor.

[0003] Moreover, because the structure is complex, the manufacturing process is complex, the manufacturing period is long, and the overall structure is mostly connected in the mode of pipe and pipe splicing, so the anti-fatigue performance is poor.

[0004] Based on this, the utility model discloses a semi-submersible fan foundation to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem that the semi-submersible fan foundation is difficult to manufacture, the cost is high and the anti-fatigue performance is poor in the prior art, and provides a semi-submersible fan foundation.

[0006] The utility model solves the above technical problem through the following technical scheme:

[0007] The utility model provides a semi-submersible fan foundation, and the characteristics are that it comprises:

[0008] At least three pontoons are horizontally placed and connected at one end to form a middle support position, and adjacent pontoons are connected through a first steel plate.

[0009] The other end of each pontoon is provided with a support column, and the top of the support column is provided with a second steel plate.

[0010] One end of the tower cylinder transition section extends to the middle support position and is connected with the pontoon, and one end of the second steel plate is connected with the tower cylinder transition section.

[0011] According to one embodiment of the utility model, at least three pontoons are welded between the middle support position and the tower cylinder transition section.

[0012] According to one embodiment of the utility model, the upper end surface of the pontoon abuts against the lower end surface of the tower cylinder transition section, and is connected with the pontoon along the outer periphery of the tower cylinder transition section through spot welding.

[0013] According to one embodiment of the utility model, the pontoon is a square steel pipe or a steel plate concrete combined square pipe.

[0014] Adjacent pontoons are welded at the middle support position.

[0015] According to one embodiment of the utility model, the opposite ends of the first steel plate are welded with the side plates of two adjacent floating cylinders respectively.

[0016] According to one embodiment of the utility model, the thickness of the first steel plate is less than the thickness of the floating cylinder, and the first steel plate is arranged close to the top surface of the floating cylinder.

[0017] According to one embodiment of the utility model, the bottom surface of the support column abuts against the top surface of the floating cylinder and is connected through welding;

[0018] The top surface of the support column abuts against the bottom surface of the second steel plate and is connected through welding.

[0019] According to one embodiment of the utility model, at least three floating cylinders are arranged uniformly around the circumferential circumference of the tower cylinder transition section.

[0020] The second steel plate corresponds to the position along the axial direction of the tower cylinder transition section.

[0021] According to one embodiment of the utility model, the support column is a steel column.

[0022] According to one embodiment of the utility model, the top of the tower cylinder transition section is provided with a connecting flange for connecting with the tower cylinder.

[0023] The positive progress effect of the utility model lies in:

[0024] The semi-submersible fan foundation of the utility model directly welds the bottom end of the tower cylinder transition section with the top of the floating cylinder, the structural strength of the floating cylinder is highest at the center position, which improves the support stability of the tower cylinder, and simplifies the connection mode of the tower cylinder bottom, the floating cylinder, the support column and the steel plate, and ensures the structural strength of the whole foundation based on the tower cylinder transition section, the support column and the first and second steel plates.

[0025] Moreover, the support column and the tower cylinder transition section, the support column and the second steel plate, the first steel plate and the floating cylinder and the adjacent floating cylinders are all connected in a surface-to-surface mode, avoiding the node fatigue problem easily caused by the conventional round tube spot welding, which is beneficial to improve the fatigue resistance of the fan foundation. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other features, properties and advantages of the utility model will become more apparent through the following description in combination with the drawings and embodiments, wherein:

[0027] Figure 1 It is the axonometric view of the semi-submersible fan foundation of the utility model;

[0028] Figure 2This is a top view of the pontoon of this utility model;

[0029] Figure 3 This is a top view of the second steel plate of this utility model.

[0030] 1. Floating pontoon; 11. Mid-section support;

[0031] 2. First steel plate;

[0032] 3. Supporting columns;

[0033] 4. Second steel plate;

[0034] 5. Tower transition section; 51. Connecting flange. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] Please refer to Figures 1 to 3 This utility model proposes a semi-submersible wind turbine foundation, which includes at least three pontoons 1. The at least three pontoons 1 are placed horizontally and connected at one end to form a central support position 11. Adjacent pontoons 1 are connected by a first steel plate 2. A support column 3 is installed at the other end of each pontoon 1, and a second steel plate 4 is provided on the top of the support column 3. One end of the tower transition section 5 extends to the central support position 11 and is connected to the pontoon 1, and one end of the second steel plate 4 is connected to the tower transition section 5.

[0038] In traditional semi-submersible wind turbine foundations, the bottom of the tower transition section 5 is suspended, and it is connected to the side connection platform set around the tower through connecting pipes or connecting plates. The function of the side connection platform is the same as that of the float 1 proposed in this application.

[0039] The traditional fan foundation, on the one hand, because the tower drum bottom is suspended, the tower drum weight is applied on the connecting pipe or connecting plate, in order to ensure the stability of the tower drum support, the size of the connecting platform and the connecting pipe or connecting plate is very large, which causes the overall size of the fan foundation to be very large. On the other hand, in order to improve the stability of the tower drum bottom, the size of the tower drum transition section 5 is also much larger than the diameter of the tower drum.

[0040] Therefore, additional processing is required for the tower drum transition section 5, which undoubtedly increases the overall weight of the fan foundation.

[0041] Based on this, the middle part of the at least three pontoons 1 is connected and forms a middle support position 11, the tower drum transition section 5 is installed in the middle part of the pontoon 1, and then the support of the tower drum is completed by means of the support column 3 arranged on the periphery.

[0042] In this way, the weight of the tower drum transition section 5 is supported by the middle part of the pontoon 1 and transmitted to the support column 3 through the pontoon 1, and the pontoon 1 cooperates with the support column 3 to improve the support stability of the tower drum transition section 5, thereby avoiding that the first steel plate 2 and the second steel plate 4 are subjected to excessive gravity load.

[0043] Optionally, the at least three pontoons 1 are welded between the middle support position 11 and the tower drum transition section 5.

[0044] It can be seen that the tower drum transition section 5 is installed in the middle support position 11 and connected with the pontoon 1 by welding. In this way, the tower drum transition section 5 and the pontoon 1 are connected in a face-to-face manner and by circumferential welding, which avoids the node fatigue problem that is prone to occur in conventional point welding of a circular pipe, and is beneficial to improve the fatigue resistance of the foundation.

[0045] That is, the upper end surface of the pontoon 1 abuts against the lower end surface of the tower drum transition section 5, and is connected with the pontoon 1 along the outer periphery of the tower drum transition section 5 by point welding.

[0046] Please refer to Figure 2 Here, three pontoons 1 are taken as an example for description, one end of the pontoon 1 is conical, the three pontoons 1 are spliced with each other and the included angle of each is 120 degrees, and the adjacent pontoons 1 are connected in a conical surface-to-conical surface manner by point welding.

[0047] The middle part of the three pontoons 1 forms a middle support position 11 after splicing, and then the bottom surface of the tower drum transition section 5 can be supported and welded.

[0048] That is, in the utility model, the one end of the three pontoons 1 converges into a middle support position 11, and then the bottom of the tower drum transition section 5 can be supported and connected.

[0049] Moreover, the circumferential size of the tower drum transition section 5 is smaller than the size of the middle support position 11, so that welding can be performed between the outer periphery of the tower drum transition section 5 and the top surface of the pontoon 1.

[0050] Please continue to refer to Figure 1 The floating tube 1 is a square steel pipe or a square pipe combined with steel plate and concrete; adjacent floating tubes 1 are welded at the middle support positions 11.

[0051] The floating tube 1 can be made of steel or steel plate and concrete according to actual conditions, which is not limited here.

[0052] Please refer to Figure 1 The opposite ends of the first steel plate 2 are respectively welded with the side plates of the adjacent two floating tubes 1.

[0053] Therefore, the first steel plate 2 and the floating tube 1 are also surface-to-surface fitted and welded. In this way, the welding difficulty of the first steel plate 2 is reduced on the one hand, and the node fatigue problem existing in the conventional point welding of the circular pipe can be avoided on the other hand.

[0054] Further, the thickness of the first steel plate 2 is less than the thickness of the floating tube 1, and the first steel plate 2 is arranged close to the top surface side of the floating tube 1.

[0055] The first steel plate 2 is used to connect adjacent floating tubes 1 and also plays a force transmission role, which is conducive to improving the stiffness of the fan foundation.

[0056] The design of the first steel plate 2 close to the top surface side of the floating tube 1 facilitates the welding of the bottom of the first steel plate 2 with the floating tube 1.

[0057] Please refer to Figure 3 The bottom surface of one end of the second steel plate 4 abuts against the top surface of the support column 3 and is connected by welding, and the other end of the second steel plate 4 is arranged in an arc shape and abuts against the tower tube transition section 5.

[0058] The second steel plate 4 is used to connect the tower tube transition section 5 and the support column 3, plays a connecting and force transmission role, and cooperates with the first steel plate 2 to improve the stability of the support for the tower tube transition section 5.

[0059] Among them, the first steel plate 2 and the second steel plate 4 are both thin steel plates, thereby the steel consumption of the fan foundation can be saved, which is conducive to meeting the lightweight demand of the fan foundation.

[0060] Moreover, the number of the first steel plate 2, the second steel plate 4, the support column 3 and the floating tube 1 are one-to-one corresponding and have the same structure, so that the fan foundation of the present application meets the modular manufacturing and installation, which is conducive to improving the construction efficiency and thus can shorten the construction period.

[0061] Taking three floating pontoons 1 as an example, the three floating pontoons 1 are structurally consistent with each other, and the three floating pontoons 1 correspond to three first steel plates 2, three second steel plates 4 and three support columns 3. The first steel plate 2 and the second steel plate 4 can be the same type of steel plate and have the same structural size. Thus, when manufacturing the fan foundation, the floating pontoon 1, the first steel plate 2, the second steel plate 4 and the support column 3 required by the application can be modularly processed, thereby facilitating the construction efficiency of the parts.

[0062] In one embodiment, the material of the support column 3 of the application is steel. In some other embodiments, the material of the support column 3 can also be a steel plate concrete composite structure, which is not limited here.

[0063] The manufacturing process of the fan foundation of the application is described as follows:

[0064] Firstly, the conical end of the floating pontoon 1 is spliced and welded, after the welding is completed, the tower transition section 5 is welded to the middle support position 11 of the floating pontoon 1, and then the first steel plate 2 is welded and installed between the adjacent floating pontoons 1.

[0065] Secondly, one end of the support column 3 is placed at the end of the floating pontoon 1 away from the middle support position 11, and is connected to the floating pontoon 1 by spot welding.

[0066] Thirdly, one end of the second steel plate 4 is abutted with the tower transition section 5 and the welding is completed, and the other end is abutted with the top surface of the support column 3, so as to further weld the connection between the second steel plate 4 and the support column 3 and the tower transition section 5.

[0067] In one embodiment, the tower transition section 5 further comprises a connecting flange 51, and the connecting flange 51 is connected to the bottom flange of the tower by a threaded connecting piece.

[0068] The threaded connecting piece can be, but is not limited to, a connecting bolt, which is not limited here. The number and distribution of the threaded connecting pieces are also not limited here.

[0069] In summary, the semi-submersible fan foundation of the application has the tower located at the center position of the multiple floating pontoons 1, improves the support stability of the fan foundation under large load, uses thin first steel plates 2 and second steel plates 4 for connection and force transmission, saves the amount of steel, makes the fan foundation structure lightweight, and is convenient for modular manufacturing and installation, improves the overall construction efficiency, thereby shortens the construction period, is suitable for deepwater large-capacity wind turbines, and is conducive to achieving the goals of reducing the cost of floating foundations and improving the stability.

[0070] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can also be mechanical connection, and those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific circumstances.

[0071] The present application uses specific words to describe the embodiments of the present application. As "one embodiment", "an embodiment", and / or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "an alternative embodiment" mentioned in different positions in the specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0072] Although the utility model discloses the above-mentioned with preferable embodiment, it is not used to limit the utility model, and any person skilled in the art can make possible change and modification without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the utility model, which does not deviate from the technical scheme of the utility model, falls within the protection scope defined by the claims of the utility model.

Claims

1. A semi-submersible wind turbine foundation, characterized in that, The utility model relates to a kind of tower structure, including: At least three pontoons, at least three The pontoon is placed horizontally and is connected to form middle support position, adjacent The pontoon is connected by first steel plate between; Support column is installed in the other end of each The pontoon, and the top of support column is equipped with second steel plate;Wherein, Tower cylinder transition section one end extends to The middle support position and is connected with The pontoon, and one end of The second steel plate is connected with The tower cylinder transition section.

2. The semi-submersible wind turbine foundation according to claim 1, characterized in that At least three The pontoon is welded between The middle support position and The tower cylinder transition section.

3. The semi-submersible wind turbine foundation according to claim 2, characterized in that The upper end surface of The pontoon is abutted with The lower end surface of The tower cylinder transition section, and is connected with The pontoon along The tower cylinder transition section outer periphery circumferentially by spot welding mode.

4. The semi-submersible wind turbine foundation according to claim 1, characterized in that The pontoon is square steel pipe or steel plate concrete combined square pipe; Adjacent The pontoon is welded at The middle support position.

5. The semi-submersible wind turbine foundation according to claim 1, characterized in that Opposite ends of The first steel plate are welded with the side plate of adjacent two The pontoon respectively.

6. The semi-submersible windmill foundation according to claim 5, characterized in that The thickness of The first steel plate is less than The thickness of The pontoon, and The first steel plate is arranged close to The pontoon top surface side.

7. The semi-submersible wind turbine foundation according to claim 1, characterized in that The bottom surface of support column is abutted with The pontoon top surface and is connected by welding; The top surface of support column is abutted with The bottom surface of second steel plate and is connected by welding.

8. The semi-submersible wind turbine foundation according to claim 1, characterized in that At least three The pontoon is arranged around The tower cylinder transition section periphery circumferentially uniformly; The second steel plate and The pontoon correspond to position along The tower cylinder transition section axial direction.

9. The semi-submersible windmill foundation according to claim 8, characterized in that, The support column is steel column.

10. The semi-submersible wind turbine foundation according to claim 1, characterized in that The top of The tower cylinder transition section is equipped with connecting flange, for being connected with tower cylinder.

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