A combined erosion-resistant semi-assembled wind turbine tower

Abstract

A combined anti-corrosion semi-assembled wind turbine tower of the present invention is composed of a top prefabricated tower and a semi-assembled tower, wherein the semi-assembled tower includes an assembled steel cylinder, a concrete layer, a glass fiber plastic layer and a middle circular ring component. The assembled steel cylinder is an assembled structure composed of a plurality of long steel cylinder components and short steel cylinder components connected and assembled by prestressed bolts. The bottom layer of the assembled steel cylinder is connected to the wind turbine foundation. After the assembled steel cylinder is assembled to a certain height, the concrete layer on the outside is poured to enhance the overall compressive strength of the tower. After the concrete layer is formed, the corrosion-resistant glass fiber plastic layer is wrapped on the outside and fixed by the middle circular ring component. A circular groove is provided on the middle circular ring component, and a circular platform replacement can be installed during pouring to facilitate construction. After pouring is completed, the inserted circular ring fixing is replaced to tighten the outer glass fiber plastic layer. After the layer-by-layer assembly, pouring and wrapping are completed, the top prefabricated tower is assembled at the top to complete the overall installation of the wind turbine tower.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power and relates to a combined erosion-resistant semi-assembled wind turbine tower barrel. Background Art

[0002] With the development of the economic society, in recent years, the country has vigorously developed the wind power industry, and wind power generation has developed rapidly. The wind turbine tower barrel is an important part of wind power generation equipment. At present, thin-walled circular steel barrels and steel-concrete circular tower barrels (the upper part is a thin-walled circular steel barrel and the lower part is concrete) are widely used for wind turbine tower barrels. For tower racks over 100 meters, the thin-walled circular steel barrel needs to increase the cross-sectional size or the wall thickness to meet the structural safety. Limited by manufacturing processes, transportation, materials, etc., the design is uneconomical. The designed service life of the wind power tower is 25 years. The steel barrel is prone to corrosion under the influence of strong sea winds, reducing the service life. The concrete tower barrel of the steel-concrete circular tower barrel is relatively high in itself, and the existing concrete tower barrel manufacturing process is cumbersome and time-consuming, greatly affecting the production rate. At the same time, the existing concrete tower barrel has relatively low torsional strength, and the wind turbine tower barrel is prone to sway under the interference of external winds, resulting in the inclination of the wind turbine, affecting the power generation of the wind turbine and the later maintenance cost. The concrete also has a corrosion problem under the long-term action of sunlight, rain, air pollution, etc. Summary of the Invention

[0003] To solve the above technical problems, the purpose of the invention is to provide a combined erosion-resistant semi-assembled wind turbine tower barrel, which solves the problems of shear resistance, transportation and hoisting difficulties by assembling steel barrels, and is connected to the lower wind turbine foundation and the upper assembled thin-walled steel barrel by assembling steel barrels. The compressive strength of the wind turbine tower barrel is increased by pouring concrete layers layer by layer on the outside, and the overall corrosion resistance is enhanced by wrapping a prestressed fiberglass plastic layer on the outside. Each layer of concrete and fiberglass layer is fixed, tied and installed conveniently by using a middle ring member. The top precast tower barrel is stably connected to the lower steel barrel by using an assembly method.

[0004] The invention provides a combined erosion-resistant semi-assembled wind turbine tower barrel, comprising: a top precast tower barrel and a semi-assembled tower barrel. The semi-assembled tower barrel is installed on the wind turbine foundation, the top precast tower barrel is installed on the semi-assembled tower barrel, and the power generation device of the wind turbine is installed on the top precast tower barrel. The semi-assembled tower barrel is composed of an assembled steel barrel, a concrete layer, a fiberglass plastic layer and a middle ring member. The concrete layer is poured layer by layer from bottom to top outside the assembled steel barrel. A middle ring member is arranged between each layer of concrete layer, and a layer of fiberglass plastic layer is tied outside each layer of concrete layer.

[0005] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, the assembled steel barrel comprises a plurality of long steel barrel members and a plurality of short steel barrel members. Both the long steel barrel members and the short steel barrel members are composed of a steel barrel wall and an assembly ring. Four steel barrel walls are assembled into a cylinder, and two assembly rings are spliced into a ring. Three assembly rings are equidistantly arranged on the steel barrel wall of the long steel barrel member, and two assembly rings are equidistantly arranged on the short steel barrel member. The distances between the assembly rings on the long steel barrel member and the short steel barrel member are equal. Both the bottom layer and the top layer of the assembled steel barrel include two long steel barrel members and two short steel barrel members. The long steel barrel members and the short steel barrel members are alternately assembled to form the steel barrel structures of the bottom layer and the top layer. The middle part of the assembled steel barrel adopts a form of staggered assembly of a plurality of long steel barrel members to connect the bottom layer and the top layer of the assembled steel barrel. During assembly, the assembly ring on the upper part of one long steel barrel member is connected to the assembly ring in the middle part of the adjacent long steel barrel member to achieve staggered assembly. A plurality of bolt holes are provided on the assembly ring. After the long steel barrel member and the short steel barrel member are assembled, they are fixed by inserting prestressed bolts into the bolt holes.

[0006] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, pouring trays are provided at the bottoms of the two long steel barrel members and the two short steel barrel members that constitute the bottom layer of the assembled steel barrel. After the bottom layer of the assembled steel barrel is assembled, the four pouring trays form a pouring disc, and the bottom layer concrete layer is poured on the pouring disc. The bottom layer of the assembled steel barrel is connected to the wind turbine foundation ring of the wind turbine foundation through the assembly ring and prestressed anchor bolts at its bottom.

[0007] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, an annular groove is provided on the pouring disc. After the bottom layer concrete layer is poured, an annular fixing member is installed in the annular groove to tightly hoop the glass fiber plastic layer that has been tied up.

[0008] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, the middle annular member is formed by splicing two semi-annular rings through buckles, and the concrete layer is poured on the corresponding middle annular member. An annular groove is provided on the top surface of the middle annular member. After the concrete layer is poured, an annular fixing member is installed in the annular groove to tightly hoop the bottom of the glass fiber plastic layer of this layer. A first tightening ring is provided on the bottom surface of the middle annular member to tightly hoop the top of the glass fiber plastic layer of its lower layer.

[0009] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, bolt holes are provided at the splicing position of the two semi-annular rings of the middle annular member. After the middle annular member is connected through buckles, it is further fastened by connecting bolts.

[0010] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, a connecting ring protrudes inward at the bottom of the top precast tower barrel. The assembly ring at the top of the top layer of the assembled steel barrel is connected and fixed to the connecting ring by prestressed bolts.

[0011] In the combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention, the bottom of the top prefabricated tower barrel extends downward to form a second tightening ring for tightening the top of the fiberglass plastic layer below it.

[0012] The combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention has at least the following beneficial effects:

[0013] 1. The wind turbine tower barrel of the present invention is composed of a top prefabricated tower barrel and a semi-assembled tower barrel. The semi-assembled tower barrel is composed of an assembled steel cylinder, a concrete layer, a fiberglass plastic layer, and a middle ring member. Both the assembled steel cylinder and the top prefabricated tower barrel are assembled structures, and operations such as pretreatment and cutting are carried out in the factory. The assembled steel cylinder is assembled layer by layer from steel cylinder long members and steel cylinder short members and is connected by prestressed bolts through the assembly rings inside the steel cylinder. The middle part of the assembled steel cylinder uses the form of misaligned assembly of multiple steel cylinder long members to enhance the connection of the horizontal transverse joints and eliminate the problem of local stress concentration caused by staggered joints, further enhancing the safety of the overall structure.

[0014] 2. The bottom layer of the assembled steel cylinder is composed of 2 steel cylinder long members and 2 steel cylinder short members according to the corresponding assembly ring height and connection. The assembly ring at the bottom layer of the assembled steel cylinder increases in thickness to serve as part of the wind power foundation flange ring. The assembly ring at the bottom layer of the assembled steel cylinder uses prestressed anchor bolts to connect the entire wind turbine tower barrel to the wind power generation foundation, making the wind power structure more integral.

[0015] 3. During the assembly process of the assembled steel cylinder, formwork can be set up to pour the concrete layer section by section. The pouring discs and the ring platform replacements installed on the middle ring members can make formwork setting more convenient. By means of semi-assembly, the time for installing and transporting concrete section by section is saved. When installing the upper assembled tower barrel, concrete pouring can be carried out simultaneously to save the construction period. Pouring the concrete layer layer by layer outside the assembled steel cylinder increases the compressive strength of the entire wind turbine tower barrel compared to a pure steel cylinder.

[0016] 4. Glass fiber-reinforced plastic (GFRP) is a composite plastic with glass fiber reinforcing unsaturated polyester, epoxy resin, and phenolic resin as the matrix materials. This material is corrosion-resistant, has good electrical insulation performance, slow heat transfer, good thermal insulation, and is easy to color. At the same time, it has high tensile strength and is suitable for use as an outer layer material. Using prestress to wrap the fiberglass plastic layer on the outer layer of the wind turbine tower barrel can make the wind turbine tower barrel more corrosion-resistant and heat-resistant. Its property of being easy to color saves the cost of spraying materials. In addition, the service life of glass fiber-reinforced plastic is about 45 to 50 years, which is much longer than the service life of the wind turbine tower barrel, and there is no need to replace it and it can be recycled.

[0017] 5. After pouring each layer of the concrete layer and wrapping the fiberglass plastic layer, use the circular fixing parts to fix the bottom of the fiberglass plastic layer, and fix the top of the fiberglass plastic layer through the first tightening ring on the bottom surface of the middle circular ring member, which can prevent falling off and is more convenient for the concrete pouring in the next stage. The top surface of the middle circular ring member is provided with a circular ring groove, and the circular ring platform replacement part can be selected and installed according to the construction progress for concrete pouring. After the pouring is completed, the circular ring platform replacement part is removed and then the circular ring fixing part is installed for fixing the fiberglass plastic layer.

[0018] 6. The overall strength of the semi - prefabricated wind turbine tower barrel of the present invention will be much higher than that of the thin - walled round steel barrel. Therefore, when applied to the project, the cross - sectional dimension and the wall thickness of such a wind turbine tower barrel will be smaller than those of the thin - walled round steel barrel, which is more economical and reasonable. Since the assembled steel barrel is composed of multiple long steel barrel members and multiple short steel barrel members, if the wind turbine exceeds its service life, its assembled steel barrel can still continue to work. Brief Description of the Drawings

[0019] Figure 1 is the overall installation schematic diagram of a combined anti - erosion semi - prefabricated wind turbine tower barrel of the present invention;

[0020] Figure 2 is the schematic diagram of the bottom layer structure of the assembled steel barrel;

[0021] Figure 3 is the connection schematic diagram between the bottom layer of the assembled steel barrel and the wind power generation foundation;

[0022] Figure 4a is the overall assembly schematic diagram of the assembled steel barrel;

[0023] Figure 4b is Figure 4a the enlarged view at A in

[0024] Figure 5 is the overall schematic diagram when the middle circular ring member is not connected;

[0025] Figure 6 is the schematic diagram of the connection part of the middle circular ring member;

[0026] Figure 7 is the sectional view of the top prefabricated tower barrel;

[0027] Figure 8 is the structural schematic diagram of the circular fixing part;

[0028] Figure 9 is the structural schematic diagram of the circular ring platform replacement part;

[0029] Figure 10 is the schematic diagram of the external pouring and assembly process after the assembled steel barrel is assembled;

[0030] Figure 11It is a force diagram of the assembled steel cylinder.

[0031] Wherein: 1 - long steel cylinder member, 2 - short steel cylinder member, 3 - prestressed anchor bolt, 4 - wind turbine foundation ring, 5 - concrete layer, 6 - fiberglass plastic layer, 7 - middle circular ring member, 71 - buckle, 72 - first tightening ring, 73 - connecting bolt, 8 - top precast tower barrel, 81 - connecting circular ring, 82 - second tightening ring, 9 - wind turbine foundation, 10 - power generation device, 101 - assembly ring, 102 - steel cylinder wall, 103 - pouring disc, 104 - bolt hole, 105 - circular ring groove, 106 - prestressed bolt, 107 - circular ring fixing piece, 108 - circular ring platform replacement piece. Specific implementation manner

[0032] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] As Figure 1 shown, a combined erosion-resistant semi-assembled wind turbine tower barrel of the present invention includes: a top precast tower barrel 8 and a semi-assembled tower barrel. The semi-assembled tower barrel is installed on the wind turbine foundation 9, the top precast tower barrel 8 is installed on the semi-assembled tower barrel, and the power generation device 10 of the wind turbine is installed on the top precast tower barrel 8. The semi-assembled tower barrel is composed of an assembled steel cylinder, a concrete layer 5, a fiberglass plastic layer 6 and a middle circular ring member 7. The concrete layer 5 is poured in layers from bottom to top outside the assembled steel cylinder, a middle circular ring member 7 is arranged between each layer of the concrete layer, and a layer of fiberglass plastic layer 6 is tied outside each layer of the concrete layer.

[0034] As Figure 2 、 Figure 4a and Figure 4bAs shown in the figure, the assembled steel cylinder includes a plurality of long steel cylinder members 1 and a plurality of short steel cylinder members 2. Both the long steel cylinder members 1 and the short steel cylinder members 2 are composed of a steel cylinder wall 102 and an assembly ring 101. Four steel cylinder walls 102 can be assembled into a cylinder, and two assembly rings 101 can be spliced into a circular ring. Three assembly rings 101 are equidistantly arranged on the steel cylinder wall 102 of the long steel cylinder member 1, and two assembly rings 101 are equidistantly arranged on the short steel cylinder member 2. The spacing of the assembly rings 101 on the long steel cylinder member 1 and the short steel cylinder member 2 is equal. Both the bottom layer and the top layer of the assembled steel cylinder include two long steel cylinder members 1 and two short steel cylinder members 2. The long steel cylinder members 1 and the short steel cylinder members 2 are alternately assembled to form the steel cylinder structures of the bottom layer and the top layer, that is, two long steel cylinder members 1 are arranged opposite to each other, and two short steel cylinder members 2 are arranged opposite to each other to assemble the bottom layer and the top layer of the assembled steel cylinder. The middle part of the assembled steel cylinder adopts a form of staggered assembly of a plurality of long steel cylinder members 1 to connect the bottom layer and the top layer of the assembled steel cylinder. During assembly, the assembly ring 101 on the upper part of one long steel cylinder member 1 is connected to the assembly ring 101 in the middle of the adjacent long steel cylinder member 1 to achieve staggered assembly. A plurality of bolt holes 104 are provided on the assembly ring 101. After the long steel cylinder member 1 and the short steel cylinder member 2 are assembled, they are fixed by inserting prestressed bolts 106 into the bolt holes 104.

[0035] As Figure 3 shown, pouring trays are provided at the bottoms of the two long steel cylinder members 1 and the two short steel cylinder members 2 that form the bottom layer of the assembled steel cylinder. After the bottom layer of the assembled steel cylinder is assembled, the four pouring trays form a pouring disk 103, which is convenient for subsequent formwork pouring of the concrete layer and binding and fixing of the fiberglass plastic layer. The bottom layer of concrete is poured on the pouring disk 103. The bottom layer of the assembled steel cylinder is connected to the fan foundation ring 4 in the fan foundation 9 through the assembly ring 103 and the prestressed anchor bolts 3 at its bottom.

[0036] As Figure 2 shown, an annular groove 105 is provided on the pouring disk 103. After the bottom layer of concrete is poured, an annular fixing member 107 is installed in the annular groove 105 to hoop the bound fiberglass plastic layer 6. Figure 3 The annular fixing member 107 has been installed on the pouring disk 103 in

[0037] As Figure 5 and Figure 6As shown in the figure, the middle ring member 7 is formed by splicing two semi - rings through the snap - fasteners 71, and the concrete layer 5 is poured on the corresponding middle ring member 7. The top surface of the middle ring member 7 is also provided with a ring groove 105. After the concrete layer is poured, a ring fixing member 107 is installed in the ring groove 105 to hoop the bottom of the fiberglass plastic layer 6 of this layer. The bottom surface of the middle ring member 7 is provided with a first hoop ring 72 for hooping the top of the fiberglass plastic layer 6 of its lower layer. There are bolt holes at the splicing position of the two semi - rings of the middle ring member 7. After the middle ring member 7 is connected by snap - fasteners, it is further fastened by the connecting bolts 73.

[0038] As Figure 7 shown in the figure, the bottom of the top precast tower barrel 8 bulges inward to form a connecting ring 81, and holes are reserved on the connecting ring 81. The assembly ring 101 at the top of the top layer of the assembled steel cylinder is connected and fixed to the connecting ring 81 by the prestressed bolt 106. The bottom of the top precast tower barrel 8 extends downward to form a second hoop ring 82 for hooping the top of the fiberglass plastic layer 6 of its lower layer.

[0039] As Figure 8 shown in the figure, the bottom of the ring fixing member 107 is provided with a ring - shaped protrusion, and multiple ring fixing members 107 are respectively installed in the ring grooves 105 of the corresponding middle ring member 7 or the pouring disc 103 through the ring - shaped protrusions at their bottoms.

[0040] Figure 9 Figure 14 is a schematic structural diagram of the ring platform replacement part 108. The bottom of the ring platform replacement part 108 is also provided with a ring - shaped protrusion. Before pouring the concrete layer, the ring platform replacement part 108 is installed in the ring groove 105 of the middle ring member 7 to facilitate the subsequent formwork pouring of the concrete layer. After pouring, the ring platform replacement part 108 is removed, then the fiberglass plastic layer 6 is tied up, and then the ring fixing member 107 is installed in the ring groove 105 to hoop the fiberglass plastic layer 6.

[0041] As Figure 10 shown in the figure, after the assembled steel cylinder is installed to a certain height, a concrete layer 5 is poured on its outer side, and a fiberglass plastic layer 6 is tied up on the outer side of the concrete layer 5. The radius of the middle ring member 7 is pre - fabricated according to the radius of the fiberglass plastic layer 6. Each layer of the middle ring member 7 is composed of two identical semi - rings, and during assembly, they are spliced and connected through the snap - fasteners 71 at both ends of the semi - rings.

[0042] The assembly process of a combined erosion - resistant semi - prefabricated wind turbine tower barrel of the present invention is as follows:

[0043] During construction, two pieces of the pre - fabricated steel cylinder long members 1 and two pieces of the pre - fabricated steel cylinder short members 2 are taken. The bottom layer is composed of four members according to Figure 2The arrow direction of is assembled by the prestressed bolt 106. And the bottom layer of the assembled steel cylinder is connected to the fan foundation 9 by using the prestressed anchor bolt 3. After the bottom layer of the assembled steel cylinder is installed, multiple long steel cylinder members 1 are assembled out of position to form the middle part of the assembled steel cylinder, and then they are connected layer by layer.

[0044] When the assembly reaches a certain height, the formwork for the concrete layer 5 is set up and the concrete is poured on the pouring disc 103. The bottom can be formworked at a certain inclination angle and then poured. After the pouring is completed and the formwork is removed, the glass fiber plastic that has been custom-colored is made into a thin-walled layer, coated with an adhesive on the inner side, and tightly wrapped in the poured concrete layer by using prestress to form the glass fiber plastic layer 6. After the glass fiber plastic layer 6 is tied up, the ring fixture 107 is installed on the pouring disc 103 to tighten the lower end of the glass fiber plastic layer 6.

[0045] The middle disc member 7 is installed on the top of the poured concrete layer. The two semi-circular rings that make up the middle disc member 7 are connected and assembled by the buckle 71, and then fixed by the connecting bolt 73 at the lower part. The first tightening ring 72 on the bottom surface of the middle disc member 7 can tighten the top of the glass fiber plastic layer 6 of its lower layer. Before pouring the upper layer of the concrete layer, the ring platform replacement part 108 is installed above the middle ring member 7. After the upper assembled steel cylinder is installed to a certain height, formwork is continued to be set up and poured and the glass fiber plastic layer is wrapped on the middle ring member 7. After the wrapping is completed, the ring platform replacement part 108 is removed and the ring fixture 107 is installed to fix the upper layer of the glass fiber plastic layer 6 until the top of the steel cylinder is completed.

[0046] When the required height is reached, two long steel cylinder members 1 and two short steel cylinder members 2 are taken for the assembly of the top layer. Subsequently, the pouring and installation of the concrete layer 5 and the glass fiber plastic layer 6 of the top layer are carried out. After a plane is formed on the top layer, the top precast tower barrel 8 is installed and the top layer of the assembled steel cylinder is connected to the top precast tower barrel 8 by using the prestressed bolt 106 to complete the installation of the tower barrel.

[0047] The working principle of the present invention: As Figure 11As shown in the figure, the wind turbine tower is generally subjected to three forces: the self-weight stress Fy of the upper wind turbine and blades, the aerodynamic thrust Fx of the air, and the torque My caused by the uneven gravity of the upper structure and the air. The overall structure jointly bears the self-weight stress Fy, and the use of a concrete layer can resist the influence of the self-weight stress Fy to a greater extent. Most of the torque My is borne by the internal assembled steel cylinder. Due to the use of the staggered assembly form, when the aerodynamic thrust Fx of the air acts, only the prestressed anchor bolts bear Fx and the torque at the joint, and stress concentration is likely to cause damage and lead to the entire breakage. Using the structure of the present invention makes the stress not concentrated on the prestressed anchor bolts but shared by the long steel cylinder member 1 and the short steel cylinder member 2, and the resistance provided by them can also improve the torsional strength of the structure. Using a glass fiber plastic layer with strong tensile strength can also resist the aerodynamic thrust Fx of the air to a greater extent, so that this wind power tower combination can withstand a greater degree of wind force and a larger power wind turbine.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the idea of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A combined erosion-resistant semi-assembled wind turbine tower barrel, characterized in that, Comprising: A top precast tower barrel and a semi - prefabricated tower barrel. The semi - prefabricated tower barrel is installed on the wind turbine foundation, the top precast tower barrel is installed on the semi - prefabricated tower barrel, and the power generation device of the wind turbine is installed on the top precast tower barrel; the semi - prefabricated tower barrel is composed of an assembled steel cylinder, a concrete layer, a fiberglass plastic layer, and a middle circular ring member. The concrete layer is poured in layers from bottom to top outside the assembled steel cylinder, and a middle circular ring member is arranged between each layer of the concrete layer. A layer of fiberglass plastic layer is tied outside each layer of the concrete layer; The assembled steel cylinder includes a plurality of long steel cylinder members and a plurality of short steel cylinder members. Both the long steel cylinder member and the short steel cylinder member are composed of a steel cylinder wall and an assembly ring. Four steel cylinder walls are assembled into a cylinder, and two assembly rings are spliced into a ring; three assembly rings are equidistantly arranged on the steel cylinder wall of the long steel cylinder member, and two assembly rings are equidistantly arranged on the short steel cylinder member. The spacing of the assembly rings on the long steel cylinder member and the short steel cylinder member is equal; both the bottom layer and the top layer of the assembled steel cylinder include two long steel cylinder members and two short steel cylinder members. The long steel cylinder members and the short steel cylinder members are alternately assembled to form the steel cylinder structures of the bottom layer and the top layer; the middle part of the assembled steel cylinder is assembled in a form where a plurality of long steel cylinder members are misaligned to connect the bottom layer and the top layer of the assembled steel cylinder. During assembly, the assembly ring on the upper part of one long steel cylinder member is connected to the assembly ring in the middle of the adjacent long steel cylinder member to achieve misaligned assembly; a plurality of bolt holes are provided on the assembly ring. After the long steel cylinder member and the short steel cylinder member are assembled, they are fixed by inserting prestressed bolts into the bolt holes; Pouring trays are provided at the bottoms of the two long steel cylinder members and the two short steel cylinder members that form the bottom layer of the assembled steel cylinder. After the bottom layer of the assembled steel cylinder is assembled, the four pouring trays form a pouring disc, and the bottom layer of the concrete layer is poured on the pouring disc; the bottom layer of the assembled steel cylinder is connected to the wind turbine foundation ring of the wind turbine foundation through the assembly ring and prestressed anchor bolts at its bottom; The middle circular ring member is formed by splicing two semi - circular rings through buckles. The concrete layer is poured on the corresponding middle circular ring member; a circular ring groove is provided on the top surface of the middle circular ring member. After the concrete layer is poured, a circular ring fixing member is installed in the circular ring groove to hoop the bottom of the fiberglass plastic layer of this layer. A first tightening ring is provided on the bottom surface of the middle circular ring member to tighten the top of the fiberglass plastic layer of its lower layer.

2. The combined erosion-resistant semi-assembled wind turbine tower barrel according to claim 1, wherein, A circular ring groove is provided on the pouring disc. After the bottom layer of the concrete layer is poured, a circular ring fixing member is installed in the circular ring groove to hoop the tied fiberglass plastic layer.

3. The combined erosion-resistant semi-assembled wind turbine tower barrel according to claim 1, characterized in that, Bolt holes are provided at the splicing position of the two semi - circular rings of the middle circular ring member. After the middle circular ring member is connected by buckles, it is further fastened by connecting bolts.

4. The combined erosion-resistant semi-assembled wind turbine tower barrel according to claim 2, characterized in that, The bottom of the top precast tower barrel bulges inward to form a connecting ring, and the assembly ring at the top of the top layer of the assembled steel cylinder is connected and fixed to the connecting ring by prestressed bolts.

5. The combined erosion-resistant semi-assembled wind turbine tower barrel according to claim 4, wherein, The bottom of the top precast tower barrel extends downward to form a second tightening ring for tightening the top of the fiberglass plastic layer of its lower layer.

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