A wind turbine generator conversion device with paired webs

Abstract

The application discloses a wind turbine conversion device with paired rib plates, which comprises a connecting cylinder, the connecting cylinder connects a steel tower cylinder section and a concrete tower cylinder section, and provides a conversion support function, a first anchoring flange is coaxially arranged in the connecting cylinder, a plurality of first openings are uniformly distributed on the first anchoring flange in a circumferential direction, and the first openings are used for allowing steel strands to pass through and be tensioned; a plurality of first rib plates are arranged on the opposite lower end surface of the first anchoring flange in an axial direction, and the first rib plates are welded and fixed to the inner wall surface of the connecting cylinder; a plurality of second rib plates are arranged on the opposite upper end surface of the first anchoring flange in an axial direction, and the second rib plates are welded and fixed to the inner wall surface of the connecting cylinder; the plurality of first rib plates and the plurality of second rib plates are alternately and uniformly distributed in a circumferential direction, and the first anchoring flange is provided with a first opening between each first rib plate and the second rib plate adjacent to the first rib plate, and the application can significantly increase the arrangement number of the steel strands without expanding the inner diameter size of the connecting cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, in particular to a wind turbine generator unit conversion device with paired rib plates. BACKGROUND

[0002] As a clean and renewable energy, wind energy has a huge amount. Wind power generation is an important measure to promote energy structure adjustment and sustainable economic development, and has significant social and environmental benefits. With the rapid development of the wind power industry, wind turbine generators tend to be high-power and high-altitude, and the matching hub height and wind turbine load are becoming larger and larger. In order to meet the height and stiffness requirements of high-tower wind turbine generator operation, prestressed concrete-steel cylinder hybrid wind power towers are usually used, so the wind turbine generator conversion structure is needed to connect the lower concrete tower section and the upper steel tower section, and the three are connected through prestressed steel strands, which can greatly reduce the height of the steel tower section.

[0003] The traditional wind turbine generator conversion structure is mainly arranged with single-layer single-circle steel strands and single-layer rib plates. A anchoring flange is usually arranged in the cylinder wall, a plurality of rib plates are arranged on one end of the anchoring flange in the circumferential direction, and an opening is arranged between the adjacent two rib plates on the anchoring flange to ensure the bearing capacity, and the opening is used for the steel strand to pass through for tensioning. In order to ensure the ability of the anchoring flange to bear the external load, the rib plate is usually welded and fixed to the cylinder wall, so a minimum size space required for welding operation (i.e. the length of the welding gun, welding rod and hand) is reserved between the adjacent two rib plates. The number of openings arranged in the cylinder wall is limited due to the size of the cylinder wall and the requirement of the structure itself, that is, there is a natural upper limit to the number of steel strands arranged in the cylinder wall. The number of steel strands arranged can only be increased by expanding the size of the cylinder wall, which limits the adaptability of the wind turbine generator support structure in the application scenarios of high hub, large unit and large impeller. Therefore, there is an urgent need for a wind turbine generator conversion structure that can increase the number of steel strands arranged without significantly expanding the size of the cylinder wall. SUMMARY

[0004] The present application provides a wind turbine generator unit conversion device with paired rib plates, which solves the technical problem of the prior art that there is no wind turbine generator conversion structure that can increase the number of steel strands arranged without significantly expanding the size of the cylinder wall.

[0005] The present application provides a wind turbine generator unit conversion device with paired rib plates, comprising:

[0006] a connecting cylinder;

[0007] A first anchoring flange is coaxially arranged inside the connecting cylinder, a plurality of first openings are uniformly distributed along the circumference on the first anchoring flange, and the first openings are used for the steel strand to pass through and be tensioned; a plurality of first rib plates are arranged on the opposite lower end surface of the first anchoring flange along the axial direction, and the first rib plates are welded and fixed to the inner wall surface of the connecting cylinder;

[0008] A plurality of second rib plates are arranged on the opposite upper end surface of the first anchoring flange along the axial direction, and the second rib plates are welded and fixed to the inner wall surface of the connecting cylinder; the plurality of first rib plates and the plurality of second rib plates are alternately and uniformly distributed along the circumference, and the first anchoring flange is provided with a first opening between each first rib plate and the second rib plate adjacent to the first rib plate.

[0009] According to the wind turbine converter with the pair of rib plates, at least the following beneficial effects are achieved:

[0010] By welding and fixing the bottom end of the first anchoring flange to the inner wall of the connecting cylinder through a plurality of first rib plates and welding and fixing the top end of the first anchoring flange to the inner wall of the connecting cylinder through a plurality of second rib plates, the number of the first rib plates is the same as that of the second rib plates, and the plurality of first rib plates and the plurality of second rib plates are uniformly distributed along the circumference, so that one first rib plate and one second rib plate are arranged on both sides of each first opening along the circumference, and the bottom end and the top end of the part of the first anchoring flange corresponding to each first opening are supported by one first rib plate and one second rib plate respectively, which can ensure the ability of the position of the first anchoring flange provided with the first opening to withstand the external load, and can also reserve a minimum size space required for welding between two first rib plates adjacent along the circumference and between two second rib plates adjacent along the circumference, so that the number of steel strands can be significantly increased without expanding the inner diameter of the connecting cylinder on the basis of welding and fixing the first rib plates and the second rib plates to the inner wall of the connecting cylinder, thereby meeting the adaptability in the application scenarios of high hubs, large units and large impellers.

[0011] In an optional embodiment, a first flange plate is arranged on the opposite lower end surface of the connecting cylinder along the axial direction, and the first flange plate is used for fixedly connecting a concrete tower cylinder section; a second flange plate is arranged on the opposite upper end surface of the connecting cylinder along the axial direction, and the second flange plate is used for fixedly connecting a steel tower cylinder section; and the projection of the first opening along the axial direction falls within the center hole range of the first flange plate and the second flange plate.

[0012] In an optional embodiment, the bottom end of the first rib plate has a first horizontal straight face, and the first horizontal straight face is welded and fixed to the first flange plate;

[0013] And / or, the top end of the second rib plate has a second horizontal straight surface, which is welded and fixed with the second flange plate.

[0014] In an alternative embodiment, the inside of the connecting cylinder is further provided with a second anchoring flange, which is coaxially arranged with the first anchoring flange and is welded and fixed to the top end of the second rib plate; a plurality of second openings are uniformly distributed along the circumference of the second anchoring flange, which are used for the steel strand to pass through for tensioning; the centers of the plurality of second openings form a circular arrangement contour with a diameter smaller than that of the first opening; the axial projection of the second opening falls within the range of the central hole of the first anchoring flange.

[0015] In an alternative embodiment, the outer circumferential surface of the second anchoring flange is arranged along the radial direction of the connecting cylinder and is spaced apart from the inner wall surface of the connecting cylinder, and the space between the outer circumferential surface of the second anchoring flange and the inner wall surface of the connecting cylinder along the radial direction of the connecting cylinder forms a gap; the axial projection of the first opening falls within the range of the gap.

[0016] In an alternative embodiment, the second anchoring flange is provided with one second opening between two adjacent second rib plates; the end surface of the second anchoring flange away from the first anchoring flange is provided with a plurality of third rib plates spaced along the circumference; the axial projection of the third rib plate falls within the range of the corresponding second rib plate.

[0017] In an alternative embodiment, the third rib plate is integrally formed with the corresponding second rib plate to form a connecting rib plate, and the side of the connecting rib plate facing the second anchoring flange is provided with a connecting opening, and the second anchoring flange is fixedly connected to the connecting opening.

[0018] In an alternative embodiment, the second anchoring flange is provided with two second openings between two adjacent second rib plates; the end surface of the second anchoring flange away from the first anchoring flange is provided with a plurality of third rib plates spaced along the circumference, and the third rib plate is welded and fixed to the inner wall surface of the connecting cylinder; the axial projection of the third rib plate at least partially overlaps with the corresponding first rib plate.

[0019] In an alternative embodiment, the second rib plate is provided with a first inclined surface at one end facing the third rib plate in the axial direction, the first inclined surface extends from the inside to the outside in the radial direction of the connecting cylinder, and gradually away from the third rib plate in the axial direction.

[0020] In an alternative embodiment, the third rib plate is provided with a second inclined surface at one end thereof in the axial direction, the second inclined surface extending from inside to outside in the radial direction of the connecting cylinder and gradually away from the second rib plate in the axial direction. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Figure 1 is a perspective structural schematic view of the first embodiment of the present application;

[0023] Figure 2 is a sectional front view structural schematic view of Figure 1

[0024] Figure 3 is a perspective structural schematic view of Figure 1 with the connecting cylinder, the first flange plate and the second flange plate removed;

[0025] Figure 4 is a sectional front view structural schematic view of the second embodiment of the present application;

[0026] Figure 5 is a perspective structural schematic view of the third embodiment of the present application;

[0027] Figure 6 is a perspective structural schematic view of Figure 5 with the connecting cylinder, the first flange plate and the second flange plate removed;

[0028] Figure 7 is a top view structural schematic view of Figure 6

[0029] Figure 8 is a sectional front view structural schematic view of Figure 5

[0030] Figure 9 is a sectional front view structural schematic view of the fourth embodiment of the present application;

[0031] Figure 10 is a sectional front view structural schematic view of the fifth embodiment of the present application.

[0032] Explanation of Reference Signs:

[0033] 100-connecting cylinder, 110-first flange plate, 120-second flange plate, 130-gap​​​

[0034] 200 - first anchoring flange, 210 - first opening;

[0035] 300 - steel strand, 310 - anchorage device;

[0036] 400 - connecting web, 410 - first web, 411 - first horizontal straight face, 420 - second web, 421 - second horizontal straight face, 422 - first inclined face, 430 - third web, 431 - second inclined face;

[0037] 500 - second anchoring flange, 510 - second opening. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] In the description of the present embodiment, it should be noted that the orientations or positional relationships indicated by the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present embodiment. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present embodiment, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be the communication inside two elements. For a person of ordinary skill in the art, the specific meanings of the above terms in the present embodiment can be understood according to the specific circumstances.

[0041] The embodiments of the present application will be described below with reference to the drawings. Figures 1 to 10

[0042] ​According to the embodiment of the present application, a wind turbine generator conversion device of paired rib plates is provided, comprising a connecting cylinder 100 connecting a steel tower cylinder section and a concrete tower cylinder section to provide conversion support function, the inside of the connecting cylinder 100 is coaxially provided with a first anchoring flange 200, a plurality of first openings 210 are uniformly distributed on the first anchoring flange 200 in the circumferential direction, and the first openings 210 are used for the steel strand 300 to pass through for tensioning; a plurality of first rib plates 410 are arranged on the opposite lower end surface of the first anchoring flange 200 in the axial direction, and the first rib plates 410 are welded and fixed to the inner wall surface of the connecting cylinder 100; a plurality of second rib plates 420 are arranged on the opposite upper end surface of the first anchoring flange 200 in the axial direction, and the second rib plates 420 are welded and fixed to the inner wall surface of the connecting cylinder 100; the plurality of first rib plates 410 and the plurality of second rib plates 420 are alternately and uniformly distributed in the circumferential direction, and the first anchoring flange 200 is located between each first rib plate 410 and the second rib plate 420 adjacent to the first rib plate 410, and the first anchoring flange 200 is provided with a first opening 210 between the first rib plate 410 and the second rib plate 420.

[0043] The wind turbine generator conversion device of the present embodiment is welded and fixed to the inner wall of the connecting cylinder 100 by a plurality of first rib plates 410 at the bottom end of the first anchoring flange 200, and is welded and fixed to the inner wall of the connecting cylinder 100 by a plurality of second rib plates 420 at the top end of the first anchoring flange 200, the number of first rib plates 410 and second rib plates 420 is the same, and the plurality of first rib plates 410 and the plurality of second rib plates 420 are uniformly distributed in the circumferential direction, so that each first opening 210 is provided with a first rib plate 410 and a second rib plate 420 on both sides in the circumferential direction (i.e. two first openings 210 are arranged between two adjacent first rib plates 410), ensuring that the bottom end and the top end of the part of the first anchoring flange 200 corresponding to each first opening 210 are supported by a first rib plate 410 and a second rib plate 420 respectively, which can not only ensure the ability of the position of the first anchoring flange 200 provided with the first opening 210 to withstand external load, but also reserve a minimum size space required for welding operation between two adjacent first rib plates 410 in the circumferential direction and between two adjacent second rib plates 420 in the circumferential direction, so as to significantly increase the number of steel strands 300 arranged without expanding the inner diameter size of the connecting cylinder 100 on the basis of meeting the welding and fixing of the first rib plate 410 and the second rib plate 420 to the inner wall of the connecting cylinder 100, thereby meeting the adaptability in the application scenarios of high hub, large unit and large impeller.

[0044] It should be noted that the first rib plate 410 and the second rib plate 420 are arranged alternately in the circumferential direction in the embodiment, and the first rib plate 410 is located at the bottom end of the first anchoring flange 200 and the second rib plate 420 is located at the top end of the first anchoring flange 200, which ensures the spacing requirement required for welding, and significantly increases the number of single steel strands 300 installed on the first anchoring flange 200 without expanding the inner diameter size of the connecting cylinder 100; compared with the related art in which the rib plate is arranged on only one side of the first anchoring flange 200 in the axial direction, the number of single steel strands 300 installed on the first anchoring flange 200 in the embodiment can be 1.5 to 2 times the number of single steel strands 300 installed on the first anchoring flange 200 in the related art, on the basis of keeping the same size of the connecting cylinder 100 and the first anchoring flange 200, the embodiment can effectively improve the construction efficiency and the quality of the weld welding, can improve the structural efficiency, and the amount of steel required for preparation is basically the same.

[0045] It should be noted that the minimum size space required for welding operation (i.e. the spacing requirement required for welding) mentioned herein refers to the length of the welding gun, welding rod and hand, which is about 350 mm.

[0046] It should be noted that the wind turbine converter device of the embodiment is a force and stiffness adapter between the steel tower cylinder section and the concrete tower cylinder section, which not only ensures the safe transmission of several tens of MN·m fatigue bending moment within twenty years of life, but also makes the on-site installation as fast as building blocks, which is a key technical node for the popularization of modern high hub and megawatt wind turbine tower structure.

[0047] It can be understood that in the embodiment, the number of the first rib plate 410 and the second rib plate 420 is the same, and the number of the first opening 210 is twice the number of the first rib plate 410.

[0048] It can be understood that the axial direction mentioned herein is the axial direction of the connecting cylinder 100, and for the convenience of description, the axial direction in the Figure 2 is taken as the axial direction for description, but not as a specific limitation on the axial direction of the connecting cylinder 100.

[0049] In a specific application, the first anchoring flange 200 is welded and fixed to the inner wall of the connecting cylinder 100, and by reserving a minimum size space required for welding between the two first rib plates 410 adjacent in the circumferential direction and between the two second rib plates 420 adjacent in the circumferential direction, the two ends of the first anchoring flange 200 in the axial direction are welded to the inner wall of the connecting cylinder 100, and the capacity of the first anchoring flange 200 to withstand external applied load is ensured.

[0050] It should be noted that after the wind turbine conversion device of this embodiment is processed and transported to the wind farm, and after the concrete tower section reaches the specified strength and the levelness of the top surface of the concrete tower section meets the technical requirements of the wind turbine manufacturer, the wind turbine conversion device of this embodiment is hoisted. After it is placed on the top surface of the concrete tower section and meets the specified accuracy, the steel strands 300 are threaded. At the top fixed end, each bundle of steel strands 300 should be vertically threaded through the first opening 2 under the hoisting action of the rope of the pulley block installed in the connecting cylinder 100 at the support point above the first anchor flange 200. 10. The bottom tensioning end and the top fixing end of the steel strand 300 should be aligned to avoid kinking. After the stranding is completed, install anchor 310 at the top fixing end to fix it to the first anchoring flange 200. The extrusion anchors of each bundle of steel strand 300 should be naturally spread out. Install multi-hole wedge anchor at the bottom tensioning end and fix it to the foundation ring inside the wind turbine foundation. The top surface of anchor 310 should be perpendicular to the tensioning direction of steel strand 300. After installation, start tensioning according to the specified tensioning process. After tensioning, cut off the excess steel strand 300 at the end and perform anti-corrosion treatment. Finally, seal anchor 310.

[0051] like Figure 1 and Figure 2 As shown, in some embodiments, the connecting cylinder 100 has a first flange 110 on its lower axial end face, which is used to fix the concrete tower section; the connecting cylinder 100 has a second flange 120 on its upper axial end face, which is used to fix the steel tower section; the projection of the first opening 210 along the axial direction falls within the central hole range of the first flange 110 and the second flange 120. The first flange 110 and the second flange 120 increase the connection area, thereby improving the stability of the connection between the steel tower section and the concrete tower section; simultaneously, by avoiding the obstruction of the first flange 110 and the second flange 120, the steel strand 300 can be hoisted vertically through the first opening 210, ensuring that the bottom anchoring end and the top tensioning end of the steel strand 300 correspond to each other, thus avoiding kinking.

[0052] Specifically, the first flange 110 is welded to the connecting cylinder 100 by a butt weld, and the second flange 120 is welded to the connecting cylinder 100 by a butt weld.

[0053] like Figure 2 and Figure 3As shown, in some embodiments, the bottom end of the first stiffening plate 410 has a first horizontal straight surface 411, which is welded and fixed to the first flange 110; the top end of the second stiffening plate 420 has a second horizontal straight surface 421, which is welded and fixed to the second flange 120. This arrangement enhances the load-bearing capacity of the first anchoring flange 200 by increasing the effect of the first stiffening plate 410 and the second stiffening plate 420, further improving the ability of the first anchoring flange 200 with the first opening 210 to withstand externally applied loads.

[0054] like Figure 2 As shown, specifically, the axial projection of the first horizontal straight surface 411 falls within the range of the first flange 110, and the axial projection of the second horizontal straight surface 421 falls within the range of the second flange 120.

[0055] The first stiffener 410 and the second stiffener 420 are for bearing the load applied by the first anchoring flange 200, which protrudes radially inward from the inner wall of the connecting cylinder 100. The minimum height of the first stiffener 410 and the second stiffener 420 is approximately 300 mm to 500 mm. When the axial distance between the bottom end of the first anchoring flange 200 and the first flange 110 is at least 1.5 times 500 mm, ... Figure 4 As shown, in some embodiments, the bottom end of the first stiffening plate 410 and the first flange 110 are axially spaced apart and not connected to each other; when the axial distance between the top end of the first anchoring flange 200 and the second flange 120 is at least 1.5 times 500 mm, such as Figure 4 As shown, in some embodiments, the top of the second stiffening plate 420 and the second flange 120 are arranged axially at intervals and are not connected to each other; this can save the amount of stiffening plate steel while meeting the structural strength requirements.

[0056] like Figures 5 to 8As shown, in some embodiments, the inside of the connecting barrel 100 is also provided with a second anchoring flange 500, which is coaxially arranged with the first anchoring flange 200 and is welded and fixed to the top end of the second rib plate 420; a plurality of second openings 510 for the steel strand 300 to pass through and be tensioned are uniformly distributed on the second anchoring flange 500 in a circumferential direction; the diameter of the circular arrangement contour formed by the centers of the plurality of second openings 510 is smaller than the diameter of the circular arrangement contour formed by the centers of the plurality of first openings 210, and the projection of the second openings 510 in the axial direction falls within the central hole range of the first anchoring flange 200. By arranging the first anchoring flange 200 and the second anchoring flange 500 axially spaced apart inside the same connecting barrel 100, and arranging the circular arrangement contour diameter formed by the centers of the plurality of second openings 510 of the upper second anchoring flange 500 to be smaller than the circular arrangement contour diameter formed by the centers of the plurality of first openings 210 of the lower first anchoring flange 200, the steel strand 300 passing through the first opening 210 and the steel strand 300 passing through the second opening do not interfere with each other due to twisting, realizing the arrangement of multiple layers of steel strand openings in the same connecting barrel 100, i.e., realizing the arrangement of multiple layers of single-turn steel strands 300 in the same connecting barrel 100, further increasing the number of steel strands 300, effectively solving the problem of limited arrangement of steel strands 300 caused by the small size of the conversion device, and effectively solving the problem of limited arrangement of steel strands 300 that requires multiple conversion devices for multiple tensioning to meet the design requirements of high hub, large unit, and large impeller application scenarios. Concentrating all the multiple layers of single-turn steel strands 300 in one device can effectively improve the construction efficiency and structural performance.

[0057] It should be noted that the wind turbine conversion structure of the related art adopts single-layer single-turn steel strand 300 arrangement, and in the application scenarios of high hub, large unit, and large impeller, multiple wind turbine conversion structures of the related art are required to perform hierarchical tensioning on two layers of steel strands 300 (i.e., two-time on-site installation and hoisting are required), which consumes a large amount of steel and has low construction efficiency. The present embodiment only needs one-time hoisting construction to complete the hierarchical tensioning of two layers of single-turn steel strands 300, which can save on-site installation and hoisting time, thereby improving the construction efficiency.

[0058] As shown in FIG. 1, the connecting barrel 100 is provided with a plurality of first openings 210 for the steel strand 300 to pass through and be tensioned, and the diameter of the circular arrangement contour formed by the centers of the plurality of first openings 210 is greater than the diameter of the circular arrangement contour formed by the centers of the plurality of second openings 510 of the second anchoring flange 500. Figure 7 and Figure 8As shown, in some embodiments, the outer circumferential surface of the second anchoring flange 500 is arranged radially apart from the inner wall surface of the connecting cylinder 100, and a gap 130 is formed between the outer circumferential surface of the second anchoring flange 500 and the inner wall surface of the connecting cylinder 100 along the radial direction of the connecting cylinder 100; the projection of the first opening 210 along the axial direction falls within the range of the gap 130. In the process of hoisting and lifting the steel strand 300 vertically through the first opening 210, it is necessary to install a pulley block at a support point in the connecting cylinder 100 above the second anchoring flange 500; by arranging the outer circumferential surface of the second anchoring flange 500 radially apart from the inner wall surface of the connecting cylinder 100, the present embodiment makes the area above the first opening 210 unobstructed, thereby facilitating the passage of the rope of the pulley block through the gap 130 and the first opening 210, and thus facilitating hoisting construction.

[0059] It should be noted that, compared to welding the outer circumferential surface of the second anchoring flange 500 to the inner wall surface of the connecting cylinder 100, the present embodiment separates the outer circumferential surface of the second anchoring flange 500 from the inner wall surface of the connecting cylinder 100 without connection, and the load-bearing performance of the second anchoring flange 500 of the present embodiment does not decrease substantially, but the amount of steel material can be reduced.

[0060] It should be noted that, in the present embodiment, the second anchoring flange 500 is arranged differently from the first anchoring flange 200, and the outer circumferential surface of the second anchoring flange 500 forms a gap 130 with the inner wall surface of the connecting cylinder 100 along the radial direction of the connecting cylinder 100, and the second anchoring flange 500 does not affect the installation of the single-loop steel strand 300 anchored to the first anchoring flange 200. Compared to the form of single-layer multi-loop arrangement of steel strands 300 (i.e., arranging multiple loops of openings in the same anchoring flange, and each loop of openings is used to arrange a loop of steel strands 300), the thickness of the single-layer anchoring flange can only adopt a single thickness, and the second anchoring flange 500 of the present embodiment adopts a suspended form supported by the second rib plate 420, which can flexibly adopt the same thickness or different thicknesses for the first anchoring flange 200 and the second anchoring flange 500 according to the same or different number of first openings 210 and second openings 510, and the amount of flange steel material can be effectively reduced. At the same time, compared to the large rib plate size brought by the form of single-layer multi-loop arrangement of steel strands 300, the small rib plate of the multi-layer arrangement of steel strands 300 of the present embodiment has higher construction efficiency.

[0061] As Figures 5 to 8As shown, in some embodiments, the second anchoring flange 500 has a second opening 510 located at the portion of two adjacent second stiffening plates 420; the end face of the second anchoring flange 500 facing away from the first anchoring flange 200 is provided with a plurality of third stiffening plates 430 spaced circumferentially, and the axial projection of the third stiffening plate 430 falls within the range of the corresponding second stiffening plate 420. By adding the third stiffening plate 430, the load-bearing capacity of the second anchoring flange 500 is improved, and the third stiffening plate 430 and the second stiffening plate 420 are aligned axially, which is beneficial to improving the ability of the location of the second anchoring flange 500 with the second opening 510 to withstand externally applied loads.

[0062] like Figure 9 As shown, in some embodiments, the third stiffener 430 and the corresponding second stiffener 420 are integrally formed to form a connecting stiffener 400. The connecting stiffener 400 has a connection port on the side facing the second anchoring flange 500, and the second anchoring flange 500 is fixedly connected to the connection port. This arrangement reduces the amount of welding required during the factory fabrication of the conversion device in this embodiment, thus shortening the fabrication period.

[0063] like Figure 10 As shown, in some embodiments, the second stiffening plate 420 has a first inclined surface 422 at one end facing the third stiffening plate 430 in the axial direction. The first inclined surface 422 extends radially from the inside to the outside of the connecting cylinder 100 and gradually moves away from the third stiffening plate 430 in the axial direction. This arrangement allows for a larger space between the second stiffening plate 420 and the third stiffening plate 430, thereby reducing the overall steel consumption of the stiffening plates while ensuring the load-bearing capacity of the second anchoring flange 500.

[0064] Specifically, the third stiffening plate 430 has a second inclined surface 431 at one end facing the second stiffening plate 420 in the axial direction. The second inclined surface 431 extends from the inside to the outside in the radial direction of the connecting cylinder 100 and gradually moves away from the second stiffening plate 420 in the axial direction. This arrangement allows for a larger space between the second stiffening plate 420 and the third stiffening plate 430, thereby reducing the overall steel consumption of the stiffening plates while ensuring the load-bearing capacity of the second anchoring flange 500.

[0065] In some embodiments, the second anchoring flange 500 is located between two adjacent second web plates 420, and two second openings 510 are spaced apart on the second anchoring flange 500; the end face of the second anchoring flange 500 away from the first anchoring flange 200 is circumferentially spaced apart with a plurality of third web plates 430, which are welded and fixed to the inner wall of the connecting cylinder 100; the axial projection of the third web plate 430 at least partially overlaps the corresponding first web plate 410. By such arrangement, the second web plate 420 and the third web plate 430 are alternately and uniformly distributed along the circumference, and the second web plate 420 is located at the bottom end of the second anchoring flange 500 and the third web plate 430 is located at the top end of the second anchoring flange 500, so that each second opening 510 is provided with a second web plate 420 and a third web plate 430 on both sides along the circumference, respectively, ensuring that the bottom end and the top end of the part of the second anchoring flange 500 corresponding to each second opening 510 are supported by a second web plate 420 and a third web plate 430, respectively, which can not only ensure the ability of the position of the second anchoring flange 500 provided with the second opening 510 to withstand external loads, but also reserve a minimum space required for welding between two adjacent second web plates 420 along the circumference and between two adjacent third web plates 430 along the circumference, so as to significantly increase the number of steel strands 300 arranged without expanding the inner diameter of the connecting cylinder 100 on the basis of welding and fixing the second web plate 420 and the third web plate 430 to the inner wall of the connecting cylinder 100, thereby meeting the adaptability in the application scenarios of high hubs, large units, and large impellers.

[0066] It can be understood that, according to the axial size of the connecting cylinder 100 and the inner diameter of the connecting cylinder 100, a third anchoring flange can also be arranged inside the connecting cylinder 100, the third anchoring flange is coaxially arranged with the second anchoring flange 500, and the third anchoring flange is welded and fixed to the top end of the third web plate 430; a plurality of third openings are uniformly distributed along the circumference on the third anchoring flange, and the third openings are used for the steel strands 300 to pass through and be tensioned; the diameter of the circular arrangement contour formed by the centers of the plurality of third openings is smaller than the diameter of the circular arrangement contour formed by the centers of the plurality of second openings, and the axial projection of the plurality of third openings falls within the central hole range of the second anchoring flange 500. By analogy, a fourth anchoring flange, a fifth anchoring flange, and the like can also be arranged inside the connecting cylinder 100 in specific applications.

[0067] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.

Claims

1. A wind turbine generator conversion device of paired webs, characterized by, The utility model relates to a kind of steel tower connection structure, including: Connecting barrel (100); First anchoring flange (200), coaxial setting in the inside of the connecting barrel (100), multiple first openings (210) are uniformly distributed in the circumferential direction on the first anchoring flange (200), and the first opening (210) is used for steel strand (300) to pass through and be tensioned;Multiple first rib plates (410) are arranged on the opposite lower end surface of the first anchoring flange (200) in the axial direction, and the first rib plate (410) is welded and fixed to the inner wall surface of the connecting barrel (100); Multiple second rib plates (420) are arranged on the opposite upper end surface of the first anchoring flange (200) in the axial direction, and the second rib plate (420) is welded and fixed to the inner wall surface of the connecting barrel (100);Multiple first rib plates (410) and multiple second rib plates (420) are alternately and uniformly distributed in the circumferential direction, and the first anchoring flange (200) is located between each first rib plate (410) and the second rib plate (420) adjacent to the first rib plate (410) Part is provided with a first opening (210).

2. The paired-rib wind turbine converter of claim 1, wherein, First flange plate (110) is arranged on the opposite lower end surface of the connecting barrel (100) in the axial direction, and the first flange plate (110) is used for fixedly connecting concrete tower barrel section;Second flange plate (120) is arranged on the opposite upper end surface of the connecting barrel (100) in the axial direction, and the second flange plate (120) is used for fixedly connecting steel tower barrel section;The projection of the first opening (210) in the axial direction falls within the center hole range of the first flange plate (110) and the second flange plate (120).

3. The paired-rib wind turbine converter of claim 2, wherein, The bottom end of the first rib plate (410) has a first horizontal straight face (411), and the first horizontal straight face (411) is welded and fixed with the first flange plate (110); And / or, the top end of the second rib plate (420) has a second horizontal straight face (421), and the second horizontal straight face (421) is welded and fixed with the second flange plate (120).

4. The paired-rib wind turbine converter of claim 1 or 2, wherein, The inside of the connecting barrel (100) is further provided with second anchoring flange (500), and the second anchoring flange (500) is coaxially arranged with the first anchoring flange (200), and the second anchoring flange (500) is welded and fixed to the top end of the second rib plate (420);Multiple second openings (510) are uniformly distributed in the circumferential direction on the second anchoring flange (500), and the second opening (510) is used for steel strand (300) to pass through and be tensioned;The diameter of the circular arrangement contour surrounded by the circle centers of multiple second openings (510) is less than the diameter of the circular arrangement contour surrounded by the circle centers of multiple first openings (210), and the projection of the second opening (510) in the axial direction falls within the center hole range of the first anchoring flange (200).

5. The paired-rib wind turbine converter of claim 4, wherein, The outer circumferential surface of the second anchoring flange (500) and the inner wall surface of the connecting cylinder (100) are arranged along the radial direction of the connecting cylinder (100), and the space between the outer circumferential surface of the second anchoring flange (500) and the inner wall surface of the connecting cylinder (100) along the radial direction of the connecting cylinder (100) forms a gap (130); the projection of the first opening (210) along the axial direction falls within the range of the gap (130).

6. The paired-rib wind turbine converter of claim 5, wherein, The second anchoring flange (500) is provided with one second opening (510) at the part located between two adjacent second rib plates (420); the end surface of the second anchoring flange (500) away from the first anchoring flange (200) is provided with a plurality of third rib plates (430) along the circumferential direction, and the projection of the third rib plate (430) along the axial direction falls within the range of the corresponding second rib plate (420).

7. The paired-rib wind turbine converter of claim 6, wherein, The third rib plate (430) and the corresponding second rib plate (420) are integrally formed into a connecting rib plate (400), and the connecting rib plate (400) is provided with a connecting port on the side facing the second anchoring flange (500), and the second anchoring flange (500) is fixedly connected to the connecting port.

8. The paired-rib wind turbine converter of claim 4, wherein, The second anchoring flange (500) is provided with two second openings (510) at the part located between two adjacent second rib plates (420); the end surface of the second anchoring flange (500) away from the first anchoring flange (200) is provided with a plurality of third rib plates (430) along the circumferential direction, and the third rib plate (430) is welded and fixed to the inner wall surface of the connecting cylinder (100); the projection of the third rib plate (430) along the axial direction at least partially overlaps the corresponding first rib plate (410).

9. The paired-rib wind turbine converter of claim 6 or 8, wherein, The second rib plate (420) is provided with a first inclined surface (422) at one end facing the third rib plate (430) in the axial direction, the first inclined surface (422) extends from inside to outside in the radial direction of the connecting cylinder (100), and gradually away from the third rib plate (430) in the axial direction.

10. The paired-rib wind turbine converter of claim 9, wherein, The third rib plate (430) is provided with a second inclined surface (431) at one end facing the second rib plate (420) in the axial direction, the second inclined surface (431) extends from inside to outside in the radial direction of the connecting cylinder (100), and gradually away from the second rib plate (420) in the axial direction.

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