Spliced steel tower drum structure and manufacturing and mounting method thereof

Abstract

The invention relates to the technical field of wind power towers, in particular to a spliced steel tower structure and a manufacturing and mounting method thereof. The spliced steel tower tube structure comprises a sectioned steel tower tube section which comprises a plurality of sectioned steel tower tubes, the sectioned steel tower tubes are formed by the sectioned steel tower tube sections, and the sectioned steel tower tubes are divided into sectioned steel tower tube sections; the sectional steel tower barrels are connected through first connecting pieces, each sectional steel tower barrel comprises I-shaped steel, flanges of every two adjacent I-shaped steel are welded, the I-shaped steel rows are jointly welded to form I-shaped steel rows, and the four I-shaped steel rows jointly form the sectional steel tower barrel which is in a shape like a Chinese character'hui 'in the overhead view. The sectioned steel tower drum is connected through a flange, the top of the sectioned steel tower drum section is connected with a second connecting piece, the upper portion of the second connecting piece is connected with the fan steel tower drum, and the lower portion of the sectioned steel tower drum section is connected with a fan foundation. Under the condition that the wall thickness or height of the tower drum is not increased, the rigidity and strength of an original steel tower drum are improved, the requirement for the bearing capacity of a fan unit is met, the steel amount of the steel tower drum is reduced, and the occupied area is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power towers, and in particular to a spliced ​​steel tower structure and a manufacturing and installation method thereof. Background Art

[0002] In wind power projects, wind turbine towers are the supporting structures of wind turbines. Steel towers are made of rolled steel plates. Their main function is to support the weight of the unit and convert wind energy into electrical energy. The height of the steel tower depends on the size of the wind turbine and the expected wind energy resources, and can reach tens of meters or even hundreds of meters. With the rapid development of wind turbines, steel towers need to have greater height, rigidity and strength, resulting in the increasing diameter of traditional steel vertebral tube towers, increasing steel wall thickness, and increasing steel consumption, which greatly increases the cost of production and installation. In order to meet the requirements of height, rigidity and strength, it is also necessary to take into account the project cost. For multi-megawatt wind turbines, a new type of steel tower structure has become an issue that needs to be urgently addressed. Summary of the invention

[0003] The first purpose of the present invention is to provide a spliced ​​steel tower structure, which can improve the stiffness and strength of the original steel tower without increasing the wall thickness or height of the tower, and meet the bearing capacity of the wind turbine unit, effectively reducing the amount of steel in the steel tower and reducing the floor space.

[0004] The second purpose of the present invention is to provide a method for manufacturing and installing a spliced ​​steel tower structure, which is low-cost, can provide sufficient bearing capacity, and is convenient and fast in terms of manufacturing technology, material transportation and construction process, and can effectively reduce transportation costs.

[0005] The present invention provides a spliced ​​steel tower structure, comprising: segmented steel tower sections and sectional steel tower sections;

[0006] The segmented steel tower section includes a plurality of segmented steel towers, a plurality of the segmented steel tower sections form a segmented steel tower, and a plurality of the segmented steel towers form a segmented steel tower section;

[0007] The segmented steel towers are connected by a first connecting member, and a single segmented steel tower comprises an I-beam, flanges of two adjacent I-beams are welded, and a plurality of I-beams are welded together to form an I-beam row, and the four I-beam rows together constitute a segmented steel tower in the shape of a U-shaped section when viewed from above;

[0008] The segmented steel towers are connected via flanges, the top of the segmented steel tower section is connected with a second connecting piece, the upper part of the second connecting piece is connected to the wind turbine steel tower, and the bottom of the segmented steel tower section is connected with a wind turbine foundation.

[0009] Preferably, a nacelle is connected to the top of the wind turbine steel tower, a hub is connected to one side of the nacelle, and blades are connected to the hub.

[0010] Preferably, the top of the segmented steel tower is connected to the second connecting member by bolts.

[0011] Preferably, the first connecting member comprises a C-shaped steel, the ribs of two adjacent C-shaped steels are connected by welding, and the two wing plates of a single C-shaped steel are respectively located on both sides of the segmented steel tower and are connected to the segmented steel tower by through bolts.

[0012] Preferably, the second connecting member is sleeved on the top of the segmented steel tower, and a circular hole is opened on the top of the second connecting member, and the circular hole has the same diameter as the bottom of the wind turbine steel tower.

[0013] Further preferably, a plurality of holes are formed on the inner side surface and the outer side surface of the second connecting member, and the second connecting member is connected to the segmented steel tower by through-bolts.

[0014] Further preferably, a flange plate is provided at the bottom of the wind turbine steel tower, holes are provided around the circular hole at the top of the second connecting member, and the second connecting member is connected to the wind turbine steel tower by bolts.

[0015] The present invention also provides a method for manufacturing and installing a spliced ​​steel tower structure, the steps of which are as follows:

[0016] S1: Weld the flanges of two I-beams into a group so that the two I-beams are spliced ​​into a cross-sectional shape of a square tube;

[0017] S2: Weld each set of I-beams to form a segmented steel tower;

[0018] S3: connecting a plurality of segmented steel tower tubes through a first connecting piece to form a segmented steel tower tube;

[0019] S4: Connect the segmented steel towers through flanges;

[0020] S5: Connect the bottom of the segmented steel tower to the wind turbine foundation;

[0021] S6: Connecting the top of the segmented steel tower with the second connecting member;

[0022] S7: Connect the second connecting piece to the steel tower of the wind turbine.

[0023] Further preferably, in S2, the steel components at the four corners of the segmented steel tower are channel steels, which are finally spliced ​​into a U-shaped segmented steel tower.

[0024] Further preferably, in S7, the second connecting member is connected to the wind turbine steel tower by bolt connection.

[0025] Beneficial effects:

[0026] The technical solution of the present invention forms a segmented steel tower by welding I-beams, which is connected into a segmented steel tower through the segmented steel tower. The bottom of the segmented steel tower is connected to the wind turbine foundation, and the top is connected to a connecting piece to form an overall spliced ​​steel tower structure. A stable spliced ​​steel tower structure is formed by connecting the second connecting piece at the top to the wind turbine steel tower. The rigidity and strength of the original steel tower are improved without increasing the wall thickness or height of the tower, and the bearing capacity of the wind turbine unit is met, thereby effectively reducing the amount of steel in the steel tower and reducing the floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the spliced ​​steel tower structure in the present invention;

[0029] Figure 2 It is the AA cross-sectional view of the spliced ​​steel tower structure in the present invention;

[0030] Figure 3 It is a top view of the first connecting member in the spliced ​​steel tower structure of the present invention;

[0031] Figure 4 It is a front view of the first connecting member in the spliced ​​steel tower structure of the present invention;

[0032] Figure 5 It is a side view of the first connecting member in the spliced ​​steel tower structure of the present invention;

[0033] Figure 6 A top view of a second connecting member in the spliced ​​steel tower structure of the present invention;

[0034] Figure 7 It is a side view of the second connecting member in the spliced ​​steel tower structure of the present invention;

[0035] Figure 8 It is a three-dimensional diagram of the second connecting member in the spliced ​​steel tower structure of the present invention;

[0036] Fig. 9 It is a top plan view of the spliced ​​steel tower structure of the present invention;

[0037] Fig.10 It is a schematic diagram of the top connection of the spliced ​​steel tower structure in the present invention;

[0038] Fig.11 It is a connection schematic diagram of the spliced ​​steel tower structure in the present invention.

[0039] Description of reference numerals:

[0040] 1: Wind turbine foundation; 2: Spliced ​​steel tower; 202: Segmented steel tower; 203: Segmented steel tower; 3: First connecting piece; 4: Second connecting piece; 5: Wind turbine steel tower; 6: Nacelle; 7: Hub; 8: Blades; 9: I-beam; 10: Channel steel; 11: Flange plate; 12: C-shaped steel. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] like Figures 1 to 10As shown, the present invention provides a spliced ​​steel tower structure, which includes a segmented steel tower 202 section and a segmented steel tower 203 section, the segmented steel tower 202 section includes a plurality of segmented steel towers 202, a plurality of segmented steel towers 202 sections form a segmented steel tower 203, a plurality of segmented steel towers 203 form a segmented steel tower 203 section, that is, a spliced ​​steel tower 2. The segmented steel towers 202 are connected by a first connecting member 3. A single segmented steel tower 202 includes an I-beam 9. The flanges of two adjacent I-beams 9 are welded. Several I-beams 9 are welded together to form a row of I-beams 9. The steel member at the edge is a channel steel 10. Four rows of I-beams 9 together constitute a segmented steel tower 202 that is in the shape of a U when viewed from above. The segmented steel towers 203 are connected by a flange 11. The top of the segmented steel tower 203 is connected to a second connecting member 4. The upper part of the second connecting member 4 is connected to the wind turbine steel tower 5. The bottom of the segmented steel tower 203 is connected to the wind turbine foundation 1.

[0045] The technical solution of the present invention forms a segmented steel tower 202 by welding an I-beam 9, which is connected to a segmented steel tower 203 through the segmented steel tower 202. The bottom of the segmented steel tower is connected to the wind turbine foundation 1, and the top is connected to the second connecting member 4 to form an overall spliced ​​steel tower structure. The second connecting member 4 and the wind turbine steel tower 5 are connected to form a stable spliced ​​steel tower structure. Without increasing the wall thickness or height of the tower, the rigidity and strength of the original steel tower are improved, the bearing capacity of the wind turbine unit is met, the amount of steel in the steel tower is effectively reduced, and the floor space is reduced.

[0046] The top of the wind turbine steel tower 5 is connected to a nacelle 6, one side of the nacelle 6 is connected to a hub 7, and the hub 7 is connected to blades 8. The top of the segmented steel tower 203 is connected to the second connecting member 4 by bolts. Specifically, in this embodiment, the four corners of the U-shaped segmented steel tower 202 are channel steels 10 to ensure that the entire segmented steel tower 202 is in the shape of a U-shaped segment. Three segmented steel towers 202 together constitute a segmented steel tower 203.

[0047] The first connecting member 3 includes a C-shaped steel 12, the ribs of two adjacent C-shaped steels 12 are connected by welding, and the two wing plates of a single C-shaped steel 12 are respectively located on both sides of the segmented steel tower 202 and connected to the segmented steel tower 202 by through bolts.

[0048] The second connecting member 4 is sleeved on the top of the segmented steel tower 203, and a circle of circular holes is provided on the top of the second connecting member 4, and the circle of circular holes is consistent with the bottom diameter of the wind turbine steel tower 5. Specifically, in this embodiment, another circle of holes is provided on the top of the second connecting member 4, and the circle of holes is provided correspondingly to the holes on the flange plate 11 at the top of the segmented steel tower 203, thereby realizing the connection between the second connecting member 4 and the segmented steel tower 203 in the vertical direction.

[0049] The inner and outer sides of the second connecting member 4 are provided with a plurality of holes, and the second connecting member 4 is connected to the segmented steel tower 202 by through-bolts. Specifically, in this embodiment, the through-bolts pass through the outer side of the second connecting member 4, the outer side of the segmented steel tower 202, and the inner side of the segmented steel tower 202 from the outside to the inside at one time, and are tightened and fixed by nuts, thereby realizing the lateral connection of the second connecting member 4 and the wind turbine steel tower 202 around.

[0050] A flange plate 11 is provided at the bottom of the wind turbine steel tower 5, a hole is provided at the top of the second connecting member 4, and the second connecting member 4 is connected to the wind turbine steel tower 5 by bolts.

[0051] The present invention also provides a method for manufacturing and installing a spliced ​​steel tower structure, the steps of which are as follows:

[0052] S1: welding the flanges of two I-beams 9 into a group, so that the two I-beams 9 are spliced ​​into a cross-sectional shape of a square tube;

[0053] S2: Weld each group of I-beams 9 to form a segmented steel tower 202. Specifically, in S2, the steel components at the edge are channel steels 10, which are finally assembled into a segmented steel tower 202 in the shape of a U-shaped segment;

[0054] S3: Connect several segmented steel towers 202 through the first connecting member 3 to form a segmented steel tower 203. Specifically, the width of the first connecting member 3 is greater than the width of the web of the I-beam 9, that is, both sides of the first connecting member 3 just abut against the web of the I-beam 9;

[0055] S4: Connect the segmented steel towers 203 by flanges. Specifically, flange plates 11 are provided on the outer sides of the upper and lower ends of the segmented steel towers 203, and adjacent flange plates 11 are fastened and connected by bolts, finally forming an integral spliced ​​steel tower 2;

[0056] S5: Connect the bottom of the segmented steel tower 203 to the wind turbine foundation 1;

[0057] S6: Connect the top of the segmented steel tower 203 to the second connecting member 4;

[0058] S7: Connect the second connecting member 4 to the wind turbine steel tower 5. Specifically, in S7, the second connecting member 4 is connected to the wind turbine steel tower 5 by bolt connection.

[0059] 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 with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spliced ​​steel tower structure, characterized in that: include: Segmented steel tower sections and segmented steel tower segments; The segmented steel tower section includes a plurality of segmented steel towers, a plurality of the segmented steel tower sections form a segmented steel tower, and a plurality of the segmented steel towers form a segmented steel tower section; The segmented steel towers are connected by a first connecting member, and a single segmented steel tower comprises an I-beam, flanges of two adjacent I-beams are welded, and a plurality of I-beams are welded together to form an I-beam row, and four I-beam rows together constitute a segmented steel tower in the shape of a U-shaped section when viewed from above; The segmented steel towers are connected via flanges, the top of the segmented steel tower section is connected with a second connecting piece, the upper part of the second connecting piece is connected to the wind turbine steel tower, and the bottom of the segmented steel tower section is connected with a wind turbine foundation.

2. The spliced ​​steel tower structure according to claim 1, characterized in that: The top of the wind turbine steel tower is connected to a nacelle, one side of the nacelle is connected to a hub, and blades are connected to the hub.

3. The spliced ​​steel tower structure according to claim 1, characterized in that: The top of the segmented steel tower is connected to the second connecting member by bolts.

4. The spliced ​​steel tower structure according to claim 1, characterized in that: The first connecting member includes a C-shaped steel, the ribs of two adjacent C-shaped steels are connected by welding, and the two wing plates of a single C-shaped steel are respectively located on both sides of the segmented steel tower and are connected to the segmented steel tower by through bolts.

5. The spliced ​​steel tower structure according to claim 1, characterized in that: The second connecting piece is sleeved on the top of the segmented steel tower, and a circular hole is opened on the top of the second connecting piece, and the diameter of the circular hole is consistent with the bottom diameter of the wind turbine steel tower.

6. The spliced ​​steel tower structure according to claim 5, characterized in that: The inner side surface and the outer side surface of the second connecting member are both provided with a plurality of holes, and the second connecting member is connected to the segmented steel tower by through-bolts.

7. The spliced ​​steel tower structure according to claim 5, characterized in that: A flange plate is arranged at the bottom of the wind turbine steel tower, holes are arranged around the circular hole at the top of the second connecting member, and the second connecting member is connected to the wind turbine steel tower by bolts.

8. A method for manufacturing and installing a spliced ​​steel tower structure according to any one of claims 1 to 7, characterized in that: Here are the steps: S1: Weld the flanges of two I-beams into a group so that the two I-beams are spliced ​​into a cross-sectional shape of a square tube; S2: Weld each set of I-beams to form a segmented steel tower; S3: connecting a plurality of segmented steel tower tubes through a first connecting piece to form a segmented steel tower tube; S4: Connect the segmented steel towers through flanges; S5: Connect the bottom of the segmented steel tower to the wind turbine foundation; S6: Connecting the top of the segmented steel tower with the second connecting member; S7: Connect the second connecting piece to the steel tower of the wind turbine.

9. The method for manufacturing and installing a spliced ​​steel tower structure according to claim 8, characterized in that: In S2, the steel components at the four corners of the segmented steel tower are channel steels, which are finally spliced ​​into a U-shaped segmented steel tower.

10. The method for manufacturing and installing a spliced ​​steel tower structure according to claim 8, characterized in that: In S7, the second connecting member is connected to the wind turbine steel tower by bolt connection.

Images