Steel tower drum and concrete tower drum connecting and supporting structure for installing wind power generation set

Abstract

The invention relates to a steel tower drum and concrete tower drum connecting and supporting structure for wind power generation set installation. The steel tower drum and concrete tower drum connecting and supporting structure comprises a concrete tower drum and a steel tower drum installed on the concrete tower drum in a sleeving mode. The concrete tower drum comprises a concrete lower tower drum and a prefabricated upper tower drum, a lower tower drum upper end face is formed at the upper end of the concrete lower tower drum, the lower tower drum upper end face is obliquely arranged in the horizontal direction, and the prefabricated upper tower drum is fixedly installed on the lower tower drum upper end face. The steel tower drum jacket is mounted on the prefabricated upper tower drum and extends to the outer circumference of the concrete lower tower drum; according to the steel tower tube and concrete tower tube connecting and supporting structure for installing the wind power generation set in the technical scheme, the steel tower tube is matched with the lower concrete tower tube and the upper prefabricated tower tube to be fixedly installed, an integrated structure is formed through subsequent pouring, the upper end face of the lower concrete tower tube is designed to be of an inclined face structure, and it is ensured that the overall structure is stably and reliably installed; and meanwhile, the situation of concrete cracking at the connecting position caused by eccentric compression of the whole structure is reduced.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generators, specifically to a support structure for connecting a steel tower and a concrete tower for installing a wind turbine generator set. Background Technology

[0002] A wind turbine is a device that converts wind energy into electrical energy. The basic structure of a wind turbine includes a foundation, tower, nacelle, and rotor. The tower, as a crucial component connecting to the base structure, directly affects the overall structural performance and usability. Wind turbine towers can be categorized by material into steel structure towers, reinforced concrete structure towers, and steel-concrete hybrid structure towers. Currently, steel structure towers are the most commonly used connection method in wind farms. However, this method has revealed some shortcomings in long-term application: tower diameter is limited by transportation conditions, tower height is limited by cost, and subsequent maintenance costs are high. To ensure the stability and durability of the connection structure between towers, steel-concrete hybrid connection towers have emerged. This connection method combines the advantages of reinforced concrete and steel structures, ensuring the tower structure's height, rigidity, and stability. Furthermore, it allows for modular design (i.e., prefabricated structure) to facilitate transportation and hoisting, making it more economical and suitable overall.

[0003] Most existing steel-concrete tower connection methods use reinforced concrete casting as the connection section between the steel tower and the concrete structure, and use it in conjunction with pre-embedded anchor cables (or anchor rods) to form an integral structure. However, due to the eccentric compression of this structure, cracks are prone to occur at the connection point, which affects the service life of the overall structure.

[0004] Therefore, to solve the above problems, a support structure for connecting the steel tower and the concrete tower for wind turbine installation is needed. Summary of the Invention

[0005] The steel tower and concrete tower connection support structure for wind turbine installation in this technical solution is formed by fixing the steel tower together with the lower concrete tower and the precast upper tower, and then pouring it to form an integrated structure. The upper end face of the lower concrete tower is designed as a sloping structure, which ensures the stability and reliability of the overall structure installation, and at the same time reduces the possibility of concrete cracking at the connection position due to eccentric pressure on the overall structure.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A support structure for connecting a steel tower and a concrete tower for wind turbine installation includes a concrete tower and a steel tower sleeve installed on the concrete tower. The concrete tower includes a lower concrete tower and a precast upper tower. The upper end of the lower concrete tower has an upper surface that is inclined in the horizontal direction. The precast upper tower is fixedly installed on the upper surface of the lower tower. The steel tower sleeve is installed on the precast upper tower and extends to the outer circumference of the lower concrete tower.

[0007] Furthermore, a concave section of the lower tower tube is formed radially inward on the outer circumference of the concrete lower tower tube to match the positioning and installation of the steel tower tube. A supporting step is formed between the concave section of the lower tower tube and the concrete lower tower tube. The steel tower tube is installed on the supporting step and fixedly installed in close contact with the concave section of the lower tower tube.

[0008] Furthermore, the upper end face of the lower tower tube is provided with a lower tower tube mounting hole along the vertical direction of the concrete lower tower tube. There are multiple lower tower tube mounting holes, and the multiple lower tower tube mounting holes are evenly distributed at intervals on the upper end face of the lower tower tube.

[0009] Furthermore, the upper end face of the lower tower is provided with radial guide grooves in the radial direction, and there are multiple radial guide grooves arranged in parallel to each other.

[0010] Furthermore, the upper end face of the lower tower is provided with a circumferential flow guide groove along the circumferential direction. There are multiple circumferential flow guide grooves arranged in parallel to each other. The multiple radial flow guide grooves intersect with the multiple circumferential flow guide grooves. The mounting hole of the lower tower is arranged at the intersection of the radial flow guide grooves and the circumferential flow guide grooves.

[0011] Furthermore, the lower end face of the prefabricated upper tower is inclined, and a pre-positioned column is formed by protruding downwards from the lower end face of the prefabricated upper tower.

[0012] Furthermore, there are multiple pre-positioning columns arranged in parallel to each other, with the lower ends of the multiple pre-positioning columns at the same horizontal height, and each of the multiple pre-positioning columns is installed in a one-to-one correspondence with the multiple lower tower mounting holes.

[0013] Furthermore, the prefabricated upper tower has an upper support ring formed vertically upwards to match the installation of the steel tower.

[0014] Furthermore, the prefabricated upper tower is equipped with a matching anchor bolt assembly.

[0015] Furthermore, the supporting steps are arranged at an angle to the horizontal direction, forming an angle B, which is 5-8°.

[0016] The beneficial effects of this technical solution are: The steel tower and concrete tower connection support structure for wind turbine installation in this technical solution is formed by fixing the steel tower together with the lower concrete tower and the precast upper tower, and then pouring it to form an integrated structure. The upper end face of the lower concrete tower is designed as a sloping structure, which ensures the stability and reliability of the overall structure installation, and at the same time reduces the possibility of concrete cracking at the connection position due to eccentric pressure on the overall structure. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention. Figure 2 This is a schematic diagram of the prefabricated upper tower structure of the present invention; Figure 3 This is a schematic diagram of a partial cross-section of the concrete lower tower of the present invention; Figure 4 This is a schematic diagram of the upper end face structure of the lower tower of the present invention; Figure 5 This is a schematic diagram of the concave section of the lower tower of the present invention; Figure 6 This is a schematic diagram of the traditional structure.

[0018] The attached diagram lists the components represented by each number as follows: 1-Screw; 2-Precast upper tower; 3-Perforated steel plate; 4-Grouting layer; 5-Steel tower; 6-Padded block; 7-Steel flange ring; 8-Concrete lower tower; 9-Upper end face of lower tower; 10-Concave section of lower tower; 11-Support step; 21-Upper support ring; 22-Precast positioning column; 91-Mounting hole of lower tower; 92-Radial guide channel; 93-Circumferential guide channel; 201-Upper section; 801-Lower section. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-3 As shown in the embodiment of this application, a support structure connecting a steel tower and a concrete tower for installing a wind turbine includes a concrete tower and a steel tower 5 installed on the concrete tower. The concrete tower includes a lower concrete tower 8 and a precast upper tower 2. The upper end of the lower concrete tower 8 has a lower tower upper surface 9, and the lower tower upper surface 9 is horizontal (i.e., Figure 1 The precast upper tower 2 is fixedly installed on the upper end face 9 of the lower tower 8 (in the horizontal direction). The steel tower 5 is installed on the precast upper tower 2 and extends to the outer circumference of the concrete lower tower 8.

[0024] The steel tower and concrete tower connection support structure for wind turbine installation in this technical solution is achieved by fixing the steel tower 5 together with the lower concrete tower 8 and the precast upper tower 2, and then casting them together to form an integrated structure. The upper end face of the lower concrete tower 8 is designed as a sloping structure, ensuring the overall structural stability and reliability (compared to traditional structures, such as...). Figure 6As shown, after the upper section 201 is installed with the steel tower, it is poured with concrete to form the lower section 801. At this time, due to the setting of the anchor bolt assembly, the upper section 201 structure will generate eccentric pressure relative to the lower section 801 due to stress. This structure is prone to cracking at the connection position. At the same time, it reduces the concrete cracking at the connection position caused by the eccentric pressure of the overall structure.

[0025] In this embodiment, a concave section 10 of the lower tower cylinder is formed radially inward on the outer circumference of the concrete lower tower cylinder 8 to cooperate with the positioning and installation of the steel tower cylinder. A supporting step 11 is formed between the concave section 10 of the lower tower cylinder and the concrete lower tower cylinder 8. The steel tower cylinder 5 is installed on the supporting step 11 and fixedly installed in close contact with the concave section 10 of the lower tower cylinder.

[0026] like Figure 1-3 As shown, both the concrete lower tower 8 and the precast upper tower 2 are assembled into a single structure using a prefabricated method, facilitating rapid subsequent installation. The outer circumference of the concrete lower tower 8 extends radially inwards (…). Figure 3 A concave section 10 of the lower tower tube is formed in the middle horizontal direction to the left, and a supporting step 11 structure is formed at the lower end of the concave section 10. The lower end of the steel tower tube 5 does not extend and is fixedly installed in conjunction with the supporting step 11. The inner surface of the steel tower tube 5 is then installed in accordance with the concave section 10 of the lower tower tube. After grouting, a stable integrated structure is formed to ensure the overall structural connection stability.

[0027] In this embodiment, the upper end face 9 of the lower tower tube is provided with a lower tower tube mounting hole 91 along the vertical direction of the concrete lower tower tube 8. There are multiple lower tower tube mounting holes 91, and the multiple lower tower tube mounting holes 91 are evenly distributed at intervals on the upper end face 9 of the lower tower tube.

[0028] like Figure 3-4 As shown, the upper end face 9 of the lower tower is inclined relative to the horizontal plane, and along the vertical direction (i.e., Figure 3 Multiple lower tower installation holes 91 are provided in the vertical direction. The multiple lower tower installation holes 91 are set at the same depth and are evenly distributed on the upper end face 9 of the lower tower. This provides a positioning foundation for the subsequent positioning and installation of the prefabricated upper tower 2, ensuring the overall structure is installed stably and accurately, while also improving construction efficiency.

[0029] In this embodiment, the upper end face 9 of the lower tower is provided with radial guide grooves 92 in the radial direction, and there are multiple radial guide grooves 92 arranged in parallel with each other.

[0030] like Figure 3-4As shown, multiple radial guide grooves 92 are provided on the upper end face 9 of the lower tower (since the upper end face 9 of the lower tower is an inclined surface, the radial direction here can be understood as the approximate radial direction). The setting of the radial guide grooves 92 facilitates the subsequent installation of the precast upper tower 2 and the concrete lower tower 8, and the grouting construction. The grout flows radially outward along the radial guide grooves 92 to the concave section 10 of the lower tower, forming a grouting layer 4 with the steel tower 5, thereby improving the connection performance of the overall structure.

[0031] In this embodiment, the upper end face 9 of the lower tower is provided with a circumferential flow guide groove 93 along the circumferential direction. There are multiple circumferential flow guide grooves 93 arranged in parallel with each other. Multiple radial flow guide grooves 92 intersect with multiple circumferential flow guide grooves 93. The lower tower mounting hole 91 is arranged at the intersection of the radial flow guide grooves 92 and the circumferential flow guide grooves 93.

[0032] like Figure 2-4 As shown, a circumferential flow guide groove 93 is provided on the upper end face 9 of the lower tower cylinder along the circumferential direction (since the upper end face 9 of the lower tower cylinder is a sloping structure, the circumferential direction here can be understood as the approximate circumferential direction). The circumferential flow guide groove 93 is arranged in multiple parallel configurations. The circumferential flow guide groove 93 and the radial flow guide groove 92 intersect each other and form an intersection point. The corresponding lower tower cylinder mounting hole 91 is arranged at the intersection point. The setting of the circumferential flow guide groove 93 facilitates the grout to enter from the radial flow guide groove 92 and flow circumferentially through the circumferential flow guide groove 93 after passing through the intersection point. The setting of the circumferential flow guide groove 93 makes the grout more evenly spread after flowing. Finally, the grout fills the entire upper end face 9 of the lower tower cylinder and forms an integral structure with the prefabricated upper tower cylinder 2, ensuring the overall performance is reliable.

[0033] In this embodiment, the lower end face of the prefabricated upper tower 2 is inclined, and a pre-positioning column 22 is formed by protruding downward from the lower end face of the prefabricated upper tower 2.

[0034] like Figure 1-2 As shown, the lower end of the prefabricated upper tower 2 is also set as an inclined structure to facilitate installation with the upper end face 9 of the lower tower. A prefabricated positioning column 22 structure is formed by protruding downward from the lower end face of the prefabricated upper tower 2. The prefabricated positioning column 22 is inserted into the mounting hole 91 of the lower tower for installation. During hoisting and installation, it can be quickly positioned and installed, improving installation efficiency and installation accuracy.

[0035] In this embodiment, there are multiple pre-positioning columns 22 arranged in parallel to each other, with the lower ends of the multiple pre-positioning columns 22 located at the same horizontal height, and the multiple pre-positioning columns 22 are installed in a one-to-one correspondence with the multiple lower tower mounting holes 91.

[0036] like Figure 1 Figure 2As shown, multiple pre-positioning columns 22 are arranged parallel to each other, and after the pre-positioning columns 22 protrude downwards, the lower end faces of the pre-positioning columns 22 are at the same height. The multiple pre-positioning columns 22 are inserted and installed in conjunction with the corresponding multiple lower tower cylinder mounting holes. After grouting, the pre-positioning columns 22 not only play a role in positioning and installation, but also play a connecting role after the grout solidifies, forming an integral whole. This enhances the connection between the upper and lower structures and improves the overall performance.

[0037] In this embodiment, the prefabricated upper tower 2 has an upper support ring 21 that is designed to fit the steel tower for installation.

[0038] The external main structure of the precast upper tower 2 uses perforated steel plate 3 as the foundation. The outer wall of the perforated steel plate 3 is fixedly installed with the steel tower 5. The interior is a concrete structure. The upper part of the precast upper tower 2 has an upward protrusion to form an upper support ring 21, which is used to fit and fix the steel tower 5. The setting of the upper support ring 21 improves the buckling resistance of the structure.

[0039] In this embodiment, the prefabricated upper tower 2 is provided with an anchor bolt assembly for use.

[0040] like Figure 1 As shown, anchor bolt assemblies are installed on the precast upper tower 2, and steel flange ring 7 is arranged on the upper end face of the precast upper tower 2. The screw 1 and the pad 6 apply prestress to the integrated connection structure to achieve the desired effect in the project. Of course, the specific installation and construction of the screw 1 and the pad 6 can be carried out using existing technologies, which will not be elaborated here.

[0041] In this embodiment, the supporting step 11 is arranged at an inclination to the horizontal direction and forms an inclination angle B, which is 5-8°.

[0042] like Figure 6 As shown, the supporting step 11 can be set with a certain inclination. This setting facilitates the subsequent positioning and installation with the steel tower 5, so as to facilitate the subsequent grouting treatment.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support structure for connecting a steel tower and a concrete tower for installing a wind turbine generator set, characterized in that: The structure includes a concrete tower and a steel tower (5) installed on the concrete tower. The concrete tower includes a lower concrete tower (8) and a precast upper tower (2). The upper end of the lower concrete tower (8) has an upper surface (9) and the upper surface (9) is inclined in the horizontal direction. The precast upper tower (2) is fixedly installed on the upper surface (9) of the lower tower. The steel tower (5) is installed on the precast upper tower (2) and extends to the outer circumference of the lower concrete tower (8).

2. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 1, characterized in that: The lower concrete tower (8) has a concave section (10) formed radially inward on its outer circumference to match the positioning and installation of the steel tower. A supporting step (11) is formed between the concave section (10) and the lower concrete tower (8). The steel tower (5) is installed on the supporting step (11) and fixedly installed in close contact with the concave section (10).

3. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 1, characterized in that: The upper end face (9) of the lower tower tube has a lower tower tube installation hole (91) that is opened downward along the vertical direction of the concrete lower tower tube (8). There are multiple lower tower tube installation holes (91) and the multiple lower tower tube installation holes (91) are evenly distributed on the upper end face (9) of the lower tower tube.

4. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 3, characterized in that: The upper end face (9) of the lower tower is provided with radial guide grooves (92) in the radial direction. There are multiple radial guide grooves (92) and the multiple radial guide grooves (92) are arranged in parallel to each other.

5. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 4, characterized in that: The upper end face (9) of the lower tower is provided with a circumferential guide groove (93) along the circumferential direction. There are multiple circumferential guide grooves (93) arranged in parallel with each other. Multiple radial guide grooves (92) intersect with multiple circumferential guide grooves (93). The lower tower mounting hole (91) is arranged at the intersection of the radial guide groove (92) and the circumferential guide groove (93).

6. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 5, characterized in that: The lower end face of the prefabricated upper tower (2) is inclined, and a pre-positioning column (22) is formed by protruding downward from the lower end face of the prefabricated upper tower (2).

7. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 6, characterized in that: The pre-positioning columns (22) are multiple and arranged in parallel with each other. The lower ends of the multiple pre-positioning columns (22) are at the same horizontal height, and the multiple pre-positioning columns (22) are installed one-to-one with the multiple lower tower mounting holes (91).

8. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 1, characterized in that: The prefabricated upper tower (2) has an upper support ring (21) that is installed in the vertical direction to match the steel tower (5).

9. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 1, characterized in that: The prefabricated upper tower (2) is equipped with a matching anchor bolt assembly.

10. The support structure connecting the steel tower and the concrete tower for wind power generation installation according to claim 2, characterized in that: The supporting step (11) is arranged at an angle to the horizontal and forms an angle B, which is 5-8°.

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