Prefabricated fan concrete tower drum section with haunched ends and wind power generation tower drum

Abstract

The utility model relates to a prefabricated fan concrete tower drum section with haunched ends and a wind power generation tower drum, and belongs to the technical field of wind power generation tower drums. The first haunching section is arranged at the lower edge opening of the tower drum section main body, and an inclined included angle structure is formed between the first haunching section and the tower drum section main body; the second haunching section is arranged on the upper edge opening of the tower drum section main body, and an inclined included angle structure is formed between the second haunching section and the tower drum section main body. Compared with the prior art, due to the haunching design of the ends of the tower drum, the stress concentration degree at the connecting joints is reduced; the problem of large interface stress caused by slab staggering during hoisting construction is relieved, the hoisting construction error-tolerant rate and the construction efficiency are improved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation tower barrels, in particular to a precast concrete tower section of a wind turbine with armpit added at the end and a wind power generation tower barrel. Background Art

[0002] The wind power generation tower barrel is an important part of a wind power generation unit. In recent years, due to the characteristics of low engineering cost, good anti-corrosion performance, excellent anti-fatigue performance, etc. of the concrete tower barrel, it has been more and more widely used in the field of wind power generation.

[0003] The wind turbine tower barrel is composed of multiple tower sections. According to different diameters, each section is composed of a whole ring or two or more slices. After the construction of each section of the tower barrel is completed, prestress is applied to form an integral stress-bearing system for the wind turbine tower barrel. The concrete tower barrel can be combined with the upper steel section, and the working frequency can be adjusted, which is suitable for regions with low wind power and large wind shear index. It is one of the solutions for the tower body design of high hub wind turbines with high current technical maturity and large installed capacity.

[0004] Due to the constraints and limitations of the connection positions of each section of the concrete section tower barrel, such as the connection method and the construction technology level, situations such as bumps and offsets usually occur. Therefore, it does not conform to the assumption of continuous stress-bearing of the full cross-section in the design hypothesis, resulting in stress concentration, and thus quality problems such as cracking and chipping, posing potential risks to the quality and the safe operation of the wind turbine. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a precast concrete tower section of a wind turbine with armpit added at the end and a wind power generation tower barrel to overcome at least one of the defects existing in the above-mentioned prior art. The tower barrel can avoid or reduce the common quality problems at the joints of the concrete wind turbine tower barrel, and reduce the maintenance cost during the life cycle of the wind turbine tower barrel.

[0006] The utility model provides a precast concrete wind turbine slice, including: precast concrete tower slices with special construction methods at the ends are combined into a tower section, and after vertical splicing of the sections made by the same method, prestress is applied to form an integral concrete section of the wind turbine tower barrel; concrete armpits are respectively arranged at the lower edge and the upper edge of each tower slice, so that the contact surface between each section is thicker than the middle part of the slice, thereby reducing the stress level at the interface of the tower sections. At the same time, problems such as large stress at the interface caused by offsets during the installation and construction of the tower sections can also be avoided, so as to avoid or reduce the common quality problems at the joints of the concrete wind turbine tower barrel, and reduce the maintenance cost during the life cycle of the wind turbine tower barrel.

[0007] The purpose of the utility model can be realized through the following technical solutions:

[0008] One of the purposes of the present utility model is a precast concrete wind turbine tower barrel segment with haunches at both ends, including: a main body of the tower barrel segment; a first haunch segment provided at the lower edge of the main body of the tower barrel segment, an inclined included angle structure being formed between the first haunch segment and the main body of the tower barrel segment; a second haunch segment provided at the upper edge of the main body of the tower barrel segment, an inclined included angle structure being formed between the second haunch segment and the main body of the tower barrel segment. Wherein, the tower barrel segment is a concrete tower barrel segment, and the first haunch segment and the second haunch segment are concrete haunches, and the specific dimensions, sizes and directions can be adjusted according to needs.

[0009] Further, the tower barrel segment is formed by circumferentially connecting two or more tower barrel slices.

[0010] Further, each tower barrel slice includes a main body of the tower barrel slice, a first haunch sub-segment provided at the lower edge of the main body of the tower barrel slice, and a second haunch sub-segment provided at the upper edge of the main body of the tower barrel slice.

[0011] Further, a plurality of the main bodies of the tower barrel slices are circumferentially connected to form the main body of the tower barrel segment; a plurality of the first haunch sub-segments are circumferentially connected to form the first haunch segment; a plurality of the second haunch sub-segments are circumferentially connected to form the second haunch segment.

[0012] Further, the width of the first haunch segment is greater than or equal to the width of any cross-section of the main body of the tower barrel segment.

[0013] Further, the width of the second haunch segment is greater than or equal to the width of any cross-section of the main body of the tower barrel segment.

[0014] Another purpose of the present utility model is a wind power generation tower barrel, including a plurality of the above-mentioned tower barrel segments; the first haunch segment or the second haunch segment of the tower barrel segment is connected to the second haunch segment or the first haunch segment of the adjacent tower barrel segment.

[0015] Further, when the diameter of the tower barrel is small, it is made as a whole ring, and at the same time, haunch structures are provided at the lower edge and the upper edge of the ring.

[0016] Further, each tower barrel segment of the tower barrel is selected with different lengths according to needs, and the haunches at the upper edge or the lower edge can be haunched at one side of the edge according to the dimensions of the adjacent connection segment.

[0017] Further, a plurality of the tower barrel segments arranged along the axis of the tower barrel have equal diameters or variable diameters.

[0018] Preferably, the stagger between two adjacent tower barrel segments is not greater than 10 mm.

[0019] Further, the connection surfaces of two adjacent tower barrel segments are connected by structural adhesive and / or by bolts.

[0020] The utility model forms the basic unit of the tower barrel, namely the tower barrel segment, by means of setting haunches at the ends of the segmented tower barrel. After the assembly of each segment is completed, prestressed cables are tensioned and prestress is applied to form the whole tower barrel.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] (1) Through the haunch design at the end of the tower barrel, the stress concentration at the connection node is reduced.

[0023] (2) It alleviates the problem of large stress at the interface caused by the stagger during hoisting construction, improves the tolerance rate and construction efficiency of hoisting construction, and saves the construction period.

[0024] (3) The design of the outer haunch structure is reasonable, convenient for processing, can avoid or reduce the common quality problems at the joints of the concrete wind turbine tower barrel, reduces the maintenance cost during the life cycle of the wind turbine tower barrel, and has unique technical and economic advantages. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the segmented tower barrel in the embodiment;

[0026] Figure 2 It is a longitudinal sectional view of the segmented tower barrel in the embodiment;

[0027] Figure 3 It is a schematic diagram of the wind power generation tower barrel in the embodiment;

[0028] As shown in the figure: 1 - vertical joint surface; 2 - first haunch sub - segment; 3 - segmented tower barrel; 4 - second haunch sub - segment; 5 - horizontal joint surface; 6 - tower barrel segment. Specific Embodiments

[0029] The following combines the drawings and specific embodiments to describe the utility model in detail. This embodiment is implemented on the premise of the technical solution of the utility model, and gives the detailed implementation method and specific operation process, but the protection scope of the utility model is not limited to the following embodiments.

[0030] The utility model provides a precast wind turbine concrete tower barrel segment with haunches at the ends, including: the main body of the tower barrel segment; a first haunch section arranged at the lower edge of the main body of the tower barrel segment, an inclined included - angle structure being formed between the first haunch section and the main body of the tower barrel segment; a second haunch section arranged at the upper edge of the main body of the tower barrel segment, an inclined included - angle structure being formed between the second haunch section and the main body of the tower barrel segment.

[0031] In an embodiment of the utility model, the tower barrel segment is formed by circumferentially connecting two or more segmented tower barrels 3.

[0032] In an embodiment of the present utility model, each of the tower barrel segments 3 includes a tower barrel segment main body, a first haunch sub-segment 2 provided at the lower edge of the tower barrel segment main body, and a second haunch sub-segment 4 provided at the upper edge of the tower barrel segment main body.

[0033] In an embodiment of the present utility model, a plurality of the tower barrel segment main bodies are circumferentially connected to form a tower barrel section main body; a plurality of the first haunch sub-segments 2 are circumferentially connected to form a first haunch section; a plurality of the second haunch sub-segments 4 are circumferentially connected to form a second haunch section. Preferably, the width of the first haunch section is greater than or equal to the width of any cross-section of the tower barrel section main body. The width of the second haunch section is greater than or equal to the width of any cross-section of the tower barrel section main body.

[0034] The present utility model also provides a wind power generation tower barrel, which includes a plurality of tower barrel sections as described above; the first haunch section or the second haunch section of the tower barrel section is connected to the second haunch section or the first haunch section of the adjacent tower barrel section.

[0035] In an embodiment of the present utility model, a plurality of the tower barrel sections arranged along the axis of the tower barrel have the same diameter or a variable diameter; the stagger between two adjacent tower barrel sections is not greater than 10 mm; the connection surfaces of two adjacent tower barrel sections are connected by structural adhesive and / or by bolts.

[0036] Embodiment

[0037] Reference Figures 1-3 , in this embodiment, a precast concrete tower barrel section of a wind turbine with end haunches is formed by circumferentially splicing two or more tower barrel segments. Each tower barrel segment includes a tower barrel segment main body, a first haunch sub-segment 2 provided at the lower edge of the tower barrel segment main body, and a second haunch sub-segment 4 provided at the upper edge of the tower barrel segment main body. After all the tower barrel sections are vertically installed and spliced, prestress is applied to form an integral concrete section of the wind turbine tower.

[0038] Optionally, when the diameter of the tower barrel section is relatively small, it is fabricated as a whole ring, and at the same time, haunch structures are provided at the lower edge and the upper edge of the tower barrel section.

[0039] The haunch dimensions of the first haunch sub-segment 2 and the second haunch sub-segment 42 of the tower barrel segment are preferably: haunch thickness 40 mm, straight haunch section length 120 mm, transition section length 80 mm. The reinforcement at the haunch is arranged in the same way as that of a corbel.

[0040] All segments are prepared and cured in the processing site according to the design requirements, with corresponding lengths, number of segments, diameters, reinforcements, and concrete material strengths.

[0041] The segments are transported to an area that meets the storage and installation requirements and is pre-selected at the wind turbine site.

[0042] After receiving the segmented parts, a comprehensive inspection shall be carried out, especially at positions such as the haunch, and there shall be no chipping, cracking or other situations.

[0043] For the tower barrel segments that have been segmented, pre-assembly shall be carried out. According to the tower barrel segment numbers, lift the corresponding tower barrel segments and place them on the assembly platform. Before assembling the vertical joint surface 1 of the tower barrel segment 3, adjust the tower barrel segment 6 to the predetermined position on the assembly tooling and adjust the position of the tower barrel segment 6 according to the on-site situation to make the joints of the tower barrel segment 6 uniform.

[0044] Evenly apply structural adhesive to the vertical joint surface 1 and assemble the connecting rod bolts of the adjacent tower barrel segments 6 to complete the assembly of the tower barrel ring 6.

[0045] Lift and install the bottom tower barrel segment, the middle tower barrel segment, the sub-top tower barrel segment, and the top tower barrel segment according to the above process. Structural adhesive shall be applied to the horizontal joint surface 5 positions of each tower barrel segment 6, and the offset between adjacent tower barrel segments 6 shall be ensured not to be greater than 10 mm.

[0046] After all segments are lifted and installed, tension the steel strands and apply prestress to form the overall wind turbine tower barrel.

[0047] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A prefabricated wind turbine concrete tower segment with haunched ends, characterized in that: include: The main body of the tower segment; A first arm section is arranged at the lower edge of the tower segment body, and an inclined angle structure is formed between the first arm section and the tower segment body; A second arm section is arranged at the upper edge of the tower segment body, and an inclined angle structure is formed between the second arm section and the tower segment body.

2. A prefabricated wind turbine concrete tower segment with haunched ends according to claim 1, characterized in that: The tower segment is formed by two or more tower segments connected in a circumferential direction.

3. A prefabricated wind turbine concrete tower segment with haunched ends according to claim 2, characterized in that: Each of the tower segments comprises a tower segment body, a first armpit section arranged at the lower edge of the tower segment body, and a second armpit section arranged at the upper edge of the tower segment body.

4. The prefabricated wind turbine concrete tower segment with haunched ends according to claim 3, characterized in that: A plurality of tower segment bodies are circumferentially connected to form a tower segment body; a plurality of the first armpit segments are circumferentially connected to form a first armpit segment; a plurality of the second armpit segments are circumferentially connected to form a second armpit segment.

5. The prefabricated wind turbine concrete tower segment with haunched ends according to claim 1, characterized in that: The width of the first armpit section is greater than or equal to the width of any cross section of the tower segment body.

6. The prefabricated wind turbine concrete tower segment with haunched ends according to claim 1, characterized in that: The width of the second armpit section is greater than or equal to the width of any cross section of the tower segment body.

7. A wind power tower, characterized in that: comprising a plurality of tower segments according to any one of claims 1 to 6; The first arm-added section or the second arm-added section of the tower segment is connected to the second arm-added section or the first arm-added section of the adjacent tower segment.

8. A wind power tower according to claim 7, characterized in that: The multiple tower segments arranged along the tower axis have equal diameters or variable diameters.

9. A wind power generation tower according to claim 7, characterized in that: The connecting surfaces of two adjacent tower segments are connected by structural adhesive and / or bolts.

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