Prefabricated segment, polygonal wind power concrete tower and wind power generation device

Abstract

The application provides a prefabricated pipe piece, a polygonal wind power concrete tower and a wind power generation device, and relates to the field of wind power equipment. The prefabricated pipe piece comprises a first plate body and a second plate body, a first side edge of the first plate body is connected with a first side edge of the second plate body, and a preset included angle is formed between the first plate body and the second plate body; a second side edge of the first plate body away from the second plate body and a second side edge of the second plate body away from the first plate body are both provided with a bolt connection structure; wherein the first plate body and the second plate body are integrally formed, and the size of the preset included angle is equal to the internal angle of any polygon in a regular quadrilateral, a regular hexagon, a regular octagon, a regular decagon and a regular dodecagon. The prefabricated pipe piece provided by the application can effectively reduce the cost and greatly improve the structural safety when the prefabricated pipe piece is used to build a polygonal wind power concrete tower.

Description

Technical Field

[0001] This application relates to the field of wind power equipment, and more particularly to a precast tunnel segment, a polygonal wind power concrete tower, and a wind power generation device. Background Technology

[0002] With the increase in the use of clean energy, the installed capacity of wind power is also increasing significantly.

[0003] In existing technologies, to raise wind turbines to a certain height and obtain more energy, towers 100-160m high are required. Due to the high cost of steel towers, concrete towers are now being used instead. Concrete towers are typically circular, with a larger diameter at the bottom and a smaller diameter at the top, forming a conical system. To reduce on-site workload and save time, concrete towers are generally prefabricated structures. Considering transportation issues, the size of the prefabricated segments cannot be too large. The concrete tower is divided into multiple rings along its height, and then these rings are further divided into multiple arc-shaped prefabricated segments, which are then assembled on-site. However, the arc-shaped prefabricated segments require high precision molds, which are difficult and costly to manufacture. Furthermore, the different diameters of the rings at different heights of the tower mean different radii of curvature, making it impossible to use molds interchangeably for prefabricated segments at different heights. This results in a large number of molds being used and incurring high costs.

[0004] To address the aforementioned technical issues, engineers proposed an improvement: designing the tower's geometry as a polygon, splicing the sections at the corners to form a hexagonal tower. This way, each prefabricated segment is a flat plate, and the staggered splicing creates a tower, resolving the high cost of molds. However, this method of manufacturing polygonal towers results in a continuous seam along the longitudinal direction of the polygon at its edges, compromising structural integrity and posing a safety hazard. Therefore, these technical problems require further resolution. Summary of the Invention

[0005] The purpose of this application is to provide a precast tunnel segment, a polygonal wind power concrete tower, and a wind power generation device to solve the technical problems of high production cost of precast tunnel segments and safety hazards caused by through longitudinal seams in the constructed tower.

[0006] To address the aforementioned technical problems, the embodiments of this application provide the following technical solutions:

[0007] In a first aspect, this application provides a precast tunnel segment made of concrete, comprising:

[0008] A first plate and a second plate, wherein the first side of the first plate is connected to the first side of the second plate, and there is a preset angle between the first plate and the second plate;

[0009] Both the second side of the first plate away from the second plate and the second side of the second plate away from the first plate are provided with bolt connection structures;

[0010] The first plate and the second plate are integrally formed, and the size of the preset included angle is equal to the interior angle of any polygon among a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon.

[0011] In some modified embodiments of this application, the preset included angle is 120 degrees;

[0012] Alternatively, the preset included angle is 135 degrees.

[0013] In some embodiments, the first cross-section at the connection between the first plate and the second plate is an isosceles trapezoid, the height of the isosceles trapezoid is the thickness of the connection, the height of the isosceles trapezoid is greater than the thickness of the first plate and the thickness of the second plate, and the first cross-section is the lower base inside the included angle between the first plate and the second plate, and the upper base outside the included angle between the first plate and the second plate.

[0014] The length of the lower bottom edge is greater than the length of the upper bottom edge.

[0015] In some embodiments, the second cross-section at the edge of the second side of the first plate is a right-angled trapezoid, and the size of the second cross-section is equal to half of the first cross-section;

[0016] The third cross-section at the edge of the second side of the second plate is a right-angled trapezoid, and the size of the third cross-section is equal to half of the first cross-section;

[0017] The second cross section and the third cross section can be joined together to form the first cross section.

[0018] In some embodiments, the bolted connection structure includes bolt holes and a cutout;

[0019] The first plate has an inner surface on one side of the bent space formed by the second plate and an outer surface on the other side. A bolt hole is provided at the edge of the second side of the first plate, extending through the end of the second side to the outer surface of the first plate. A hollowed-out portion is provided on the inner surface of the first plate near the edge of the second side of the first plate. The hollowed-out portion cuts the bolt hole into two segments, and the hollowed-out portion is connected to both segments of the bolt hole.

[0020] The bolt connection structure at the second side of the second plate is the same as the bolt connection structure at the second side of the first plate.

[0021] In some embodiments, the surface of the first plate and the second plate located in the bent space they enclose is the inner surface, and the surface opposite to the inner surface is the outer surface.

[0022] The bolt connection structure is formed by pre-embedding a bolt sleeve at the end of the second side of the first plate towards the outer surface of the first plate. The axis of the pre-embedded bolt sleeve has a preset angle with the perpendicular line of the end face of the second side of the first plate.

[0023] A hand hole is provided on the inner surface of the second plate near the second side, and a through hole is provided in the hand hole to the end face of the second side of the second plate to form the bolt connection structure, and the axis of the through hole has the preset angle with the perpendicular line of the end face of the second side of the second plate.

[0024] In some embodiments, a plurality of bolt connection structures are provided on the second side of the first plate and the second side of the second plate.

[0025] In some embodiments, a first sealing groove is provided on the end face of the second side of the first plate along the height direction of the first plate, and the first sealing groove is provided on the end face of the second side of the second plate along the height direction of the second plate.

[0026] A second sealing groove is provided on the end face of the second side of the first plate near the edge of the inner side of the first plate; a second sealing groove is provided on the end face of the second side of the second plate near the edge of the inner side of the second plate.

[0027] When multiple prefabricated segments are arranged in a ring, two first sealing grooves are aligned and two second sealing grooves are aligned. Both the first and second sealing grooves are filled with sealing material.

[0028] In some embodiments, the main body portion of the first plate has the same thickness as the main body portion of the second plate;

[0029] Furthermore, the thickness at the connection between the first plate and the second plate is greater than the thickness of the main body of the first plate.

[0030] In some embodiments, the thickness of the edge portion of the second side of the first plate is the same as the thickness of the edge portion of the second side of the second plate.

[0031] Furthermore, the thickness of the edge portion of the second side of the first plate is greater than the thickness of the main body portion of the first plate.

[0032] Secondly, this application provides a polygonal wind turbine concrete tower, comprising: precast segments;

[0033] The precast segment includes: a first plate and a second plate, wherein a first side of the first plate is connected to a first side of the second plate, and there is a preset angle between the first plate and the second plate;

[0034] Both the second side of the first plate away from the second plate and the second side of the second plate away from the first plate are provided with bolt connection structures;

[0035] Wherein, the first plate and the second plate are integrally formed, and the size of the preset included angle is equal to the interior angle of any polygon among a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon;

[0036] Multiple prefabricated tube segments are bolted together in sequence to form any one of the following polygonal rings: a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon. The number of polygonal rings is multiple, and the perimeter of the multiple polygonal rings gradually decreases.

[0037] The polygonal wind turbine concrete tower is formed by arranging multiple polygonal rings with gradually decreasing circumferences along the vertical direction.

[0038] The longitudinal gaps between the prefabricated segments of two adjacent polygonal rings are staggered at a certain angle.

[0039] Thirdly, this application provides a wind power generation device, including: a polygonal wind power concrete tower;

[0040] The polygonal wind turbine concrete tower includes: precast tunnel segments;

[0041] The precast segment includes: a first plate and a second plate, wherein a first side of the first plate is connected to a first side of the second plate, and there is a preset angle between the first plate and the second plate;

[0042] Both the second side of the first plate away from the second plate and the second side of the second plate away from the first plate are provided with bolt connection structures;

[0043] Wherein, the first plate and the second plate are integrally formed, and the size of the preset included angle is equal to the interior angle of any polygon among a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon;

[0044] Multiple prefabricated tube segments are bolted together in sequence to form any one of the following polygonal rings: a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon. The number of polygonal rings is multiple, and the perimeter of the multiple polygonal rings gradually decreases.

[0045] The polygonal wind turbine concrete tower is formed by arranging multiple polygonal rings with gradually decreasing circumferences along the vertical direction.

[0046] The longitudinal gaps between the prefabricated segments of two adjacent polygonal rings are staggered at a certain angle.

[0047] Compared to existing technologies, the precast segments, polygonal wind power concrete towers, and wind power generation devices provided in this application include two integrally formed plates with a preset angle between them. Bolt connection structures are provided on the second side of both plates. Precast segments with this structure can be arranged into regular polygonal rings (quadrilaterals, hexagons, octagons, or decagons) of different perimeters according to design requirements and fixed by bolt connection. Then, the regular polygonal rings can be arranged to form a polygonal wind power concrete tower by decreasing the perimeter in the vertical direction. When arranging the rings, adjacent regular polygonal rings can be rotated by a certain angle to stagger the longitudinal cracks between the rings. It is evident that using the precast segments provided in this application can prevent longitudinal through gaps in the constructed polygonal wind turbine concrete tower, ensuring the overall structural safety. Furthermore, since the angle of each interior angle of the polygonal ring formed by the precast segments is the same, the mold for the V-shaped precast segments at a certain angle can be divided into straight sections and corner sections during production. When different lengths of precast segments need to be produced due to different circumferences of the polygonal ring at different heights, only the length of the mold in the straight section needs to be changed to accommodate the length dimensions of the precast segments at different heights, greatly improving the versatility of the mold and effectively reducing mold development and usage costs. In summary, using the precast segments provided in this application to construct polygonal wind turbine concrete towers can effectively reduce costs while ensuring structural safety. Attached Figure Description

[0048] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0049] Figure 1 A schematic diagram of a precast segment is shown.

[0050] Figure 2 A schematic diagram of a precast segment's cross-section without the bolted connection structure is shown.

[0051] Figure 3 A schematic diagram of the cross-section of a precast segment at the location of a bolted connection structure is shown.

[0052] Figure 4 A schematic diagram of the connection structure between two precast segments is shown.

[0053] Figure 5 A schematic diagram of the cross-section of another precast segment via a bolted connection structure is shown.

[0054] Figure 6 The diagram schematically illustrates a polygonal ring structure of a section of a polygonal wind turbine concrete tower formed by connecting multiple prefabricated segments.

[0055] Figure 7 A schematic diagram of a polygonal wind turbine concrete tower is shown.

[0056] The labels in the above attached figures are:

[0057] First plate 1, second plate 2, preset included angle R, bolt connection structure 3, bolt hole 31, hollow part 32, pre-embedded bolt sleeve 33, hand hole 34, through hole 35, first cross section 4, second cross section 5, third cross section 6, first sealing groove 7, second sealing groove 8, polygonal ring 9. Detailed Implementation

[0058] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0060] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0063] Example 1

[0064] like Figures 1-5 As shown, the precast tunnel segments provided in Embodiment 1 of this application are made of concrete and include:

[0065] A first plate 1 and a second plate 2, wherein the first side of the first plate 1 is connected to the first side of the second plate 2, and there is a preset included angle R between the first plate 1 and the second plate 2;

[0066] Both the second side of the first plate 1 away from the second plate 2 and the second side of the second plate 2 away from the first plate 1 are provided with bolt connection structures 3;

[0067] The first plate 1 and the second plate 2 are integrally formed, and the size of the preset included angle R is equal to the interior angle of any polygon among a regular quadrilateral, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon.

[0068] Specifically, the precast segments provided in this application embodiment are integrally formed by casting concrete using molds in a factory. That is, the first plate 1 and the second plate 2 of the precast segment are described as two parts for the convenience of describing the structural shape of the precast segment, but in reality they should be an integral structure.

[0069] The first plate 1 and the second plate 2 are both flat plates, allowing multiple precast segments to form a polygonal ring 9. The preset included angle R between the first plate 1 and the second plate 2 can be determined according to the polygonal shape of the wind turbine concrete tower to be built. For example, if the required polygonal wind turbine concrete tower is a regular hexagon, then the included angle between the first plate 1 and the second plate 2 is equal to the angle of one interior angle of the regular hexagon. To enable a quick and stable connection between the precast segments, bolt connection structures 3 are provided on the second side of both the first plate 1 and the second side of the second plate 2. Furthermore, it should be explained that the precast segments are divided into length and height directions during use. The distance from the second side of the first plate 1 to the second side of the second plate 2 is the length of the precast segment, and the distance perpendicular to the length direction of the first plate 1 and the second plate 2 is the height of the precast segment (which is also the height of the first plate 1 and the second plate 2).

[0070] Compared to existing technologies, the precast tunnel segments provided in this application include two integrally formed plates at a preset angle, and bolt connection structures 3 are provided on the second side of both plates. Precast tunnel segments with this structure can be formed into regular polygonal rings 9 (quadrilateral, hexagon, octagon or decagon) of different circumferences according to design requirements, and fixed by bolt connection. Then, the regular polygonal rings 9 can be arranged to form a polygonal wind power concrete tower by decreasing the circumference in the vertical direction. When arranging and forming, adjacent regular polygonal rings 9 can be rotated by a certain angle so that the longitudinal cracks between the rings are staggered. It is evident that using the precast segments provided in this application can prevent longitudinal through gaps in the constructed polygonal wind turbine concrete tower, ensuring the overall structural safety. Furthermore, since the angle of each interior angle of the polygonal ring 9 formed by the precast segments is the same, the mold for the V-shaped precast segments at a certain angle can be divided into straight sections and corner sections during production. When different lengths of precast segments need to be produced due to different circumferences in the polygonal ring 9 at different heights, only the length of the mold in the straight section needs to be changed to accommodate the length dimensions of the precast segments at different heights, greatly improving the versatility of the mold and effectively reducing mold development and usage costs. In summary, using the precast segments provided in this application to construct polygonal wind turbine concrete towers can effectively reduce costs while ensuring structural safety.

[0071] like Figure 1 and Figure 2As shown, in specific implementation, considering the specific structure of the polygonal wind power concrete tower, its actual application, and the wind resistance of the polygonal wind power concrete tower, it is preferred that the shape of each ring of the polygonal wind power concrete tower is hexagonal and octagonal. Therefore, the preferred included angle R between the first plate 1 and the second plate 2 of the prefabricated segment is 120 degrees or 135 degrees.

[0072] like Figure 2 As shown, in a specific implementation, the first cross-section 4 at the connection between the first plate 1 and the second plate 2 is an isosceles trapezoid. The height of the isosceles trapezoid is the thickness of the connection. The height of the isosceles trapezoid is greater than the thickness of the first plate 1 and the thickness of the second plate 2. The first cross-section 4 has its lower base inside the angle between the first plate 1 and the second plate 2 and its upper base outside the angle between the first plate 1 and the second plate 2. The length of the lower base is greater than the length of the upper base.

[0073] Specifically, by setting the connection between the first plate 1 and the second plate 2 to have an isosceles trapezoidal cross-section, the precast segments can transition smoothly at the bends. At the same time, the bends are straight angle transitions rather than rounded angle transitions, which facilitates the mold design of the precast segments. In addition, the isosceles trapezoidal cross-section at the connection between the first plate 1 and the second plate 2 also makes the outer side of the precast segment and the bend position plane rather than prism, which can increase the strength of the bend on the outer side of the precast segment and avoid damage to the prism caused by impact.

[0074] Furthermore, the main body of the first plate 1 has the same thickness as the main body of the second plate 2; and the thickness at the connection between the first plate 1 and the second plate 2 is greater than the thickness of the main body of the first plate 1.

[0075] Specifically, by setting the cross section at the connection between the first plate 1 and the second plate 2 as an isosceles trapezoid, and making the thickness of the connection (i.e. the height of the isosceles trapezoid) greater than the thickness of the first body and the second plate 2, the structural strength of the precast segments at the bends can be further increased, ensuring safety during use.

[0076] like Figure 2 As shown, in a specific implementation, the second cross-section 5 at the edge of the second side of the first plate 1 is a right-angled trapezoid, and the size of the second cross-section 5 is equal to half of the first cross-section 4; the third cross-section 6 at the edge of the second side of the second plate 2 is a right-angled trapezoid, and the size of the third cross-section 6 is equal to half of the first cross-section 4; wherein the second cross-section 5 and the third cross-section 6 can be joined together to form the first cross-section 4.

[0077] Specifically, setting the edge of the second side of the first plate 1 to have a right-angled trapezoidal cross section and setting the edge of the second side of the second plate 2 to have a right-angled trapezoidal cross section not only facilitates the installation of bolt connection structure 3 on the second side of both plates, but also makes the cross section formed by two adjacent second sides form an isosceles trapezoid when multiple segments form a ring of a polygonal wind power concrete tower. The structure of the connection between the two segments can be the same as the structure of the connection between the first plate 1 and the second plate 2, thereby making the polygon formed by multiple segments a regular polygon to meet the requirements for constructing a polygonal wind power concrete tower.

[0078] Furthermore, the thickness of the edge portion of the second side of the first plate 1 is the same as the thickness of the edge portion of the second side of the second plate 2; and the thickness of the edge portion of the second side of the first plate 1 is greater than the thickness of the main body portion of the first plate 1.

[0079] Specifically, by setting the edge portions of the second side of the first plate 1 and the second side of the second plate 2 into right-angled trapezoids, and making the thickness (i.e., the height of the right-angled trapezoid) greater than the thickness of the first plate and the second plate 2, the structural strength of the multiple prefabricated segments at the connection point can be further enhanced, ensuring safety during use. The thickness of the edge portions of the second side of the first plate 1 and the second side of the second plate 2 can be the same as the thickness at the connection point of the first plate 1 and the second plate 2.

[0080] like Figure 3 and Figure 4 As shown, in a specific implementation, the bolt connection structure 3 includes a bolt hole 31 and a cutout 32;

[0081] The first plate 1 has an inner surface on one side of the bent space formed by the second plate 2, and an outer surface on the other side. A bolt hole 31 is provided at the edge of the second side of the first plate 1, extending through the end of the second side to the outer surface of the first plate 1. A hollow portion 32 is provided on the inner surface of the first plate 1 near the edge of the second side of the first plate 1. The hollow portion 32 cuts the bolt hole 31 into two segments, and the hollow portion 32 is connected to both segments of the bolt hole 31.

[0082] The bolt connection structure 3 at the second side of the second plate 2 is the same as the bolt connection structure 3 at the second side of the first plate 1.

[0083] Specifically, multiple bolt connection structures 3 are provided on the second side of both the first plate 1 and the second plate 2. This allows bolts to be inserted into the bolt holes 31 and nuts to be placed in the cutouts 32. The two pipe segments are then securely connected by tightening the bolts and nuts. It should be noted that after connecting the two pipe segments with bolts and nuts, the exposed parts of the bolts and nuts require anti-corrosion treatment.

[0084] like Figure 5 As shown, in specific implementations, the bolted connection structure 3 can also take another form:

[0085] A bolt sleeve 33 is pre-embedded at the end of the second side of the first plate 1 toward the outer surface of the first plate 1 to form the bolt connection structure 3. The axis of the pre-embedded bolt sleeve 33 has a preset angle with the perpendicular line of the end face of the second side of the first plate 1. A hand hole 34 is provided on the inner surface of the second plate 2 near the second side, and a through hole 35 is provided in the hand hole 34 toward the end face of the second side of the second plate 2 to form the bolt connection structure 3. The axis of the through hole 35 has the preset angle with the perpendicular line of the end face of the second side of the second plate 2.

[0086] Specifically, the bolt connection structure 3 in the form of a pre-embedded bolt sleeve 33 located on the second side of the first plate 1 and the bolt connection structure 3 in the form of a hand hole 34 + through hole 35 located on the second side of the second plate 2 can be interchanged. The hand hole 34 is a missing part machined on the inner surface of the second plate 2 near the second side, so that a wrench can be inserted to tighten the bolt.

[0087] Furthermore, the second side of the first plate 1 and the second side of the second plate 2 are each provided with a plurality of the bolt connection structures 3.

[0088] like Figure 3 and Figure 5 As shown, in a specific implementation, the end face of the second side of the first plate 1 is provided with a first sealing groove 7 along the height direction of the first plate 1, and the end face of the second side of the second plate 2 is provided with the first sealing groove 7 along the height direction of the second plate 2.

[0089] A second sealing groove 8 is provided on the end face of the second side of the first plate 1 near the edge of the inner side of the first plate 1, and a second sealing groove 8 is provided on the end face of the second side of the second plate 2 near the edge of the inner side of the second plate 2.

[0090] When multiple precast segments are arranged in a ring, two first sealing grooves 7 are engaged, and two second sealing grooves 8 are engaged. Both the first sealing grooves 7 and the second sealing grooves 8 are used to fill sealing material.

[0091] Specifically, the cross-sectional shape of the first sealing groove 7 can be a semi-circular, V-shaped, U-shaped, dovetail-shaped, or other shapes. Similarly, the cross-sectional shape of the second sealing groove 8 can also be a semi-circular, V-shaped, U-shaped, dovetail-shaped, or other shapes. With the first sealing groove 7 and the second sealing groove 8, when multiple precast segments are connected to form a section of a polygonal wind turbine concrete tower ring, the connection gap between two precast segments will be sealed by the sealing material filled in the two sealing grooves, effectively providing waterproofing.

[0092] Example 2

[0093] like Figure 7 As shown, the polygonal wind turbine concrete tower provided in Embodiment 2 of this application includes: Figures 1-5 The precast tunnel segments shown;

[0094] The precast segment includes: a first plate 1 and a second plate 2, wherein a first side of the first plate 1 is connected to a first side of the second plate 2, and a preset included angle R is formed between the first plate 1 and the second plate 2; both the second side of the first plate 1 away from the second plate 2 and the second side of the second plate 2 away from the first plate 1 are provided with bolt connection structures 3; wherein the first plate 1 and the second plate 2 are integrally formed, and the size of the preset included angle R is equal to the interior angle of any polygon among a regular quadrilateral, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon;

[0095] like Figure 6 As shown, multiple prefabricated segments are bolted together in sequence to form any one of the following polygonal rings 9: a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon. The number of polygonal rings 9 is multiple, and the perimeter of the multiple polygonal rings 9 gradually decreases. The multiple polygonal rings 9 are arranged in a vertical direction with the perimeter gradually decreasing to form the polygonal wind turbine concrete tower. The longitudinal gaps between the prefabricated segments of two adjacent polygonal rings 9 are staggered by a certain angle.

[0096] Specifically, the polygonal wind turbine concrete tower is formed by arranging multiple polygonal rings 9 with gradually decreasing perimeters. Prestressed steel strands are also installed longitudinally to secure the multiple polygonal rings 9. The prestressed steel strands are multiple in number and evenly spaced around the perimeter of the polygonal rings 9. Furthermore, the specific structure of the precast segments used in Embodiment 2 can be found in Embodiment 1 above, and will not be repeated here.

[0097] The polygonal wind power concrete tower provided in this application uses prefabricated segments comprising two integrally formed plates at a preset angle. Bolt connection structures 3 are provided on the second side of both plates. Prefabricated segments with this structure can be arranged into regular polygonal rings 9 (quadrilateral, hexagon, octagon or decagon) of different circumferences according to design requirements and fixed by bolt connection. Then, the regular polygonal rings 9 can be arranged to form a polygonal wind power concrete tower by decreasing the circumference in the vertical direction. When arranging the rings, adjacent regular polygonal rings 9 can be rotated by a certain angle to stagger the longitudinal cracks between the rings. It is evident that using the precast segments provided in this application can prevent longitudinal through gaps in the constructed polygonal wind turbine concrete tower, ensuring the overall structural safety. Furthermore, since the angle of each interior angle of the polygonal ring 9 formed by the precast segments is the same, the mold for the V-shaped precast segments at a certain angle can be divided into straight sections and corner sections during production. When different lengths of precast segments need to be produced due to different circumferences in the polygonal ring 9 at different heights, only the length of the mold in the straight section needs to be changed to accommodate the length dimensions of the precast segments at different heights, greatly improving the versatility of the mold and effectively reducing mold development and usage costs. In summary, using the precast segments provided in this application to construct polygonal wind turbine concrete towers can effectively reduce costs while ensuring structural safety.

[0098] Example 3

[0099] The wind power generation device provided in Embodiment 3 of this application includes: Figure 7 The polygonal wind turbine concrete tower shown;

[0100] The polygonal wind turbine concrete tower includes: as follows Figures 1-5 The precast tunnel segments shown;

[0101] The precast segment includes: a first plate 1 and a second plate 2, wherein a first side of the first plate 1 is connected to a first side of the second plate 2, and a preset included angle R is formed between the first plate 1 and the second plate 2; both the second side of the first plate 1 away from the second plate 2 and the second side of the second plate 2 away from the first plate 1 are provided with bolt connection structures 3; wherein the first plate 1 and the second plate 2 are integrally formed, and the size of the preset included angle R is equal to the interior angle of any polygon among a regular quadrilateral, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon;

[0102] like Figure 6As shown, multiple prefabricated segments are bolted together in sequence to form any one of the following polygonal rings 9: a regular square, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon. The number of polygonal rings 9 is multiple, and the perimeter of the multiple polygonal rings 9 gradually decreases. The multiple polygonal rings 9 are arranged in a vertical direction with the perimeter gradually decreasing to form the polygonal wind turbine concrete tower. The longitudinal gaps between the prefabricated segments of two adjacent polygonal rings 9 are staggered by a certain angle.

[0103] Specifically, the precast segments described in this embodiment three can directly use the precast segments provided in embodiment one above. For the specific implementation structure, please refer to the relevant content described in embodiment one above, which will not be repeated here.

[0104] The wind power generation device provided in this application uses prefabricated segments to manufacture the polygonal wind power concrete tower. The prefabricated segments include two integrally formed plates with a preset angle between them. Bolt connection structures 3 are provided on the second side of both plates. The prefabricated segments with this structure can be arranged into regular polygonal rings 9 (quadrilateral, hexagon, octagon or decagon) with different circumferences according to the design requirements and fixed by bolt connection. Then, the regular polygonal rings 9 can be arranged to form a polygonal wind power concrete tower by decreasing the circumference in the vertical direction. When arranging and forming, adjacent regular polygonal rings 9 can be rotated by a certain angle so that the longitudinal cracks between the rings are staggered. It is evident that using the precast segments provided in this application can prevent longitudinal through gaps in the constructed polygonal wind turbine concrete tower, ensuring the overall structural safety. Furthermore, since the angle of each interior angle of the polygonal ring 9 formed by the precast segments is the same, the mold for the V-shaped precast segments at a certain angle can be divided into straight sections and corner sections during production. When different lengths of precast segments need to be produced due to different circumferences in the polygonal ring 9 at different heights, only the length of the mold in the straight section needs to be changed to accommodate the length dimensions of the precast segments at different heights, greatly improving the versatility of the mold and effectively reducing mold development and usage costs. In summary, using the precast segments provided in this application to construct polygonal wind turbine concrete towers can effectively reduce costs while ensuring structural safety.

[0105] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A precast segment for use in the construction of a concrete pipe, characterised in that, The utility model relates to a prefabricated pipe piece, comprising: a first plate body and a second plate body, a first side edge of the first plate body is connected with a first side edge of the second plate body, and a preset included angle is formed between the first plate body and the second plate body; a second side edge of the first plate body away from the second plate body and a second side edge of the second plate body away from the first plate body are provided with bolt connection structures; wherein the first plate body and the second plate body are integrally formed, and the size of the preset included angle is equal to the internal angle of any polygon in a regular quadrilateral, a regular hexagon, a regular octagon, a regular decagon and a regular dodecagon; a first cross section at a connection between the first plate body and the second plate body is in the shape of an isosceles trapezoid, the height of the isosceles trapezoid is the thickness of the connection, the height of the isosceles trapezoid is greater than the thickness of the first plate body and the thickness of the second plate body, and the lower base of the first cross section is on the inner side of the included angle between the first plate body and the second plate body, and the upper base of the first cross section is on the outer side of the included angle between the first plate body and the second plate body; wherein the length of the lower base is greater than the length of the upper base; a second cross section at the edge of the second side edge of the first plate body is in the shape of a right-angled trapezoid, and the size of the second cross section is equal to half of the size of the first cross section; a third cross section at the edge of the second side edge of the second plate body is in the shape of a right-angled trapezoid, and the size of the third cross section is equal to half of the size of the first cross section; wherein the second cross section and the third cross section can be combined to form the first cross section.

2. The prefabricated pipe piece according to claim 1, wherein: the preset included angle is 120 degrees; or the preset included angle is 135 degrees.

3. The prefabricated pipe piece according to claim 1, wherein: the bolt connection structure comprises a bolt hole and a hollowed-out part; one side surface of the first plate body in a bending space surrounded by the first plate body and the second plate body is an inner surface, the other side surface of the first plate body is an outer surface, the edge of the second side edge of the first plate body is provided with the bolt hole penetrating through the end of the second side edge to the outer surface of the first plate body, and the inner surface of the first plate body is provided with the hollowed-out part near the edge of the second side edge of the first plate body, the hollowed-out part divides the bolt hole into two sections, and the hollowed-out part is in communication with the two sections of the bolt hole; the bolt connection structure at the second side edge of the second plate body is the same as the bolt connection structure at the second side edge of the first plate body.

4. The prefabricated pipe piece according to claim 1, wherein: one side surface of the first plate body and the second plate body in a bending space surrounded by the first plate body and the second plate body is an inner surface, and the other side surface opposite to the inner surface is an outer surface; the end of the second side edge of the first plate body is embedded with a bolt sleeve in the direction of the outer surface of the first plate body to form the bolt connection structure, and the axis of the embedded bolt sleeve has a preset angle with the perpendicular line of the end surface of the second side edge of the first plate body. The inner surface of the second plate body is provided with a hand hole near the second side edge, and a through hole is formed in the hand hole to form the bolt connection structure, and the axis of the through hole has the preset angle with the vertical line of the end surface of the second side edge of the second plate body.

5. The precast segment according to claim 3 or 4, characterized in that, The second side edge of the first plate body and the second side edge of the second plate body are both provided with a plurality of the bolt connection structures.

6. The precast segment according to any one of claims 1-4, characterized in that, The end surface of the second side edge of the first plate body is provided with a first sealing groove along the height direction of the first plate body, and the end surface of the second side edge of the second plate body is provided with the first sealing groove along the height direction of the second plate body; The end surface of the second side edge of the first plate body is provided with a second sealing groove near the edge of the inner side of the first plate body, and the end surface of the second side edge of the second plate body is provided with the second sealing groove near the edge of the inner side of the second plate body; When a plurality of the precast segments enclose a ring, two of the first sealing grooves are closed, two of the second sealing grooves are closed, and the first sealing grooves and the second sealing grooves are both filled with sealing materials.

7. A polygonal windmill concrete tower, characterized in that The precast segment according to any one of claims 1-6; A plurality of the precast segments are bolted in sequence to enclose any polygonal ring of a regular quadrilateral, a regular hexagon, a regular octagon, a regular decagon, and a regular dodecagon, the number of the polygonal rings is a plurality, and the circumferences of the plurality of the polygonal rings gradually decrease; The plurality of the polygonal rings are arranged in a vertical direction with the circumferences gradually decreasing to form the polygonal wind power concrete tower. The longitudinal gaps between the precast segments of adjacent two polygonal rings are staggered by a certain angle. The polygonal wind power concrete tower according to claim 7.

8. A wind power plant, characterized in that The polygonal wind power concrete tower according to claim 7. ​

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