CN103867019A - Assembly type external prestressing active powder concrete wind power tower - Google Patents

Abstract

The invention relates to an assembly type external prestressing active powder concrete wind power tower. The assembly type external prestressing active powder concrete wind power tower comprises a foundation and a plurality tower barrels. The foundation is made of reinforced concrete. A foundation ring is embedded in the foundation. Each tower barrel is formed by pouring active powder concrete and is in a conical barrel shape. The inner side of each tower barrel is provided with a plurality of prestressing reinforcing bars in the longitudinal direction. The upper ends of the prestressing reinforcing bars are anchored on the inner side of the upper end face of each tower barrel after being stretched, and the lower ends of the prestressing reinforcing bars are connected with the foundation ring in an anchored mode. The prestressing reinforcing bars are evenly and equidistantly distributed on the inner walls of the tower barrels. The assembly type external prestressing active powder concrete wind power tower is reasonable in structure, low in manufacturing cost, convenient to transport and assemble, high in bearing capacity, good in durability and crack resistance, long in service life and easy to maintain.

Description

Prefabricated external prestressed active powder concrete wind power tower

technical field

The invention belongs to wind power generation equipment, in particular to an assembled external prestressed active powder concrete wind power tower.

Background technique

At present, the shortage of energy has become a major problem facing all countries, which has driven the development and utilization of wind energy technology. Wind power has become the first choice for countries all over the world to develop new energy strategies. With the strong support of the government, my country's wind power generation has formed a scale, and the wind turbines are also developing towards large-scale development, and the demand for wind power towers is also increasing. At present, the general wind power towers are almost all steel structures, which require a large amount of steel and high manufacturing costs. At the same time, due to the corrosion of steel structures, the workload of later maintenance is huge, which increases the maintenance cost during use. At the same time, the application of concrete wind power towers is relatively small, and there are only a small number of applications in small wind power towers. The traditional prestressed concrete wind power tower is adopted, the strength of the concrete is low, and the wall thickness of the wind power tower is relatively thick, the structure is bulky, and it is not convenient for transportation and hoisting. Wind power projects require new materials and new structural designs to provide projects with economical and reasonable new towers that meet the requirements of use.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide an assembled external prestressed active powder concrete wind power tower with reasonable structure, convenient transportation and assembly, and low manufacturing cost and maintenance cost.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an assembled externally prestressed active powder concrete wind power tower, which includes a foundation and several sections of tower tubes, and is characterized in that: the foundation is a reinforced concrete foundation, and the prestressed The foundation ring is buried; each section of the tower is made of active powder concrete and is in the shape of a cone; the inner side of each section of the tower is longitudinally provided with a number of prestressed steel bars; the upper end of the prestressed steel bars is anchored after stretching The inner side of the upper end face of the tower tube, and the lower end are anchored and connected with the foundation ring.

The prestressed steel bars are uniformly distributed along the inner wall of the tower.

The inner side of the upper end face of the bottom section tower and the middle section tower is axially provided with several anchor connection blocks, and the upper ends of the prestressed steel bars arranged on the inner side of the bottom section tower and the middle section tower are respectively anchored and connected to the corresponding anchor connection blocks. The upper and lower ends are anchored on the base ring.

The upper end of the top section of the tower is provided with a steel flange for fixing the wind turbine, and the upper end of the prestressed steel bars inside the top section of the tower is directly anchored on the steel flange, and the prestressed steel bars are installed along the top section of the tower and the lower part of the tower. The inner walls of all the towers are downward, and the lower ends are anchored on the foundation ring.

The tower tube is prefabricated in separate parts, and when assembled, the parts are bonded by active powder concrete and reinforced by corrugated steel bars.

The tower is also provided with a number of longitudinal non-prestressed steel bars and circumferential non-prestressed steel bars, and the circumferential non-prestressed bars are arranged on the inner and outer sides of the longitudinal non-prestressed steel bars.

The upper and lower sections of the tower are bonded by resin cement.

The present invention can prefabricate the active powder concrete tower in sections in the factory, and each section of the tower is divided into integral prefabrication or split prefabrication, and is transported to the installation site for prestress tensioning and assembly. Compared with the prior art, the present invention has a simple structure and a high bearing capacity, is suitable for various equipment and wind power site environments, and can better meet the requirements of large-scale wind power equipment, can greatly reduce processing and maintenance costs, reduce construction difficulty, and facilitate transportation and hoisting. And can improve crack resistance and service life. The concrete is denser and has better crack resistance. It has the characteristics of high strength, good durability, long service life, light weight and stability. It can reduce the weight of the tower, reduce transportation costs, and increase corrosion resistance.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the composition and structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the upper end of the tower at the top section of the present invention.

Fig. 3 is a schematic diagram of the connection between the bottom tower and the foundation ring of the present invention.

Fig. 4 is a schematic plan view of the upper end face of the middle tower of the present invention.

Fig. 5 is a schematic diagram of the structure of the upper end of the bottom tower of the present invention.

Fig. 6 is a schematic cross-sectional view of the connection between adjacent petals of the split tower of the present invention.

Fig. 7 is a schematic longitudinal sectional view of the connection between adjacent petals of the split tower in the present invention.

The numbers in the figure are: 1. Foundation, 2. Bottom tower, 3. Middle tower, 4. Top tower, 5. Steel flange, 6. Foundation ring, 7. Prestressed steel bar, 8 .Prestressed steel bars, 9. Prestressed steel bars, 10. Active powder concrete, 11. Anchors, 12. Anchor connection blocks, 13. Corrugated steel bars, 14. Splicing joints.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

It can be seen from Fig. 1 that an assembled externally prestressed active powder concrete wind power tower includes a foundation 1 and several tower sections. The foundation 1 is a reinforced concrete foundation, in which a foundation ring 6 is pre-embedded. The base ring 6 can be a steel flange. The tower includes a bottom tower 2 , a middle tower 3 , and a top tower 4 . The tower tube 3 in the middle section can be one section or multiple sections. Each section of the tower tube is poured from active powder concrete 10 and is in the shape of a cone. The bottom tower tube 2 is fixed on the foundation ring 6 . The towers of each section are docked and assembled sequentially from bottom to top, and the diameter and wall thickness of the towers gradually decrease from bottom to top to form the entire cone-shaped tower. Bond with resin adhesive when docking. A steel flange 5 is pre-embedded in the upper end of the tower tube 4 at the top section, and is connected with the wind power generator.

As can be seen from Fig. 1, Fig. 2 and Fig. 3, the inner side of each section of the tower tube of the present invention is longitudinally provided with several prestressed steel bars. The prestressed steel bars are evenly and equidistantly distributed along the inner wall of the tower tube. After stretching, the upper end of the prestressed steel bar is anchored on the inner side of the upper end surface of the tower, and the lower end is anchored to the foundation ring 6 . Specifically, the inner side of the tower tube 2 at the bottom section is provided with prestressed steel bars 7 , and the prestressed steel bars 7 at the bottom section tower tube are only arranged inside the tower tube 2 at the bottom section. After the prestressed steel bar 7 is stretched, the upper end is anchored on the inner side of the upper end surface of the bottom section tower tube 2, and the lower end is anchored and connected to the foundation ring 6 through the anchor 11, as shown in FIG. 3 . The inner side of the tower tube 3 in the middle section is provided with prestressed steel bars 8, the prestressed steel bars 8 are arranged inside the tower tube 3 in the middle section and the tower tube 2 in the bottom section, and the upper ends of the 8 prestressed steel bars are anchored to the upper end surface of the tower tube 3 in the middle section On the inner side, the lower end is anchored and connected with the base ring 6 through the anchor 11 . The inner side of the top tower 4 is also provided with prestressed steel bars 9, the prestressed steel bars 9 of the top tower 4 are arranged along the entire length of the tower, and are arranged on the top tower 4, the middle tower 3 and the bottom. The inner side of the section tower tube 2. After the prestressed steel bars 9 are stretched, the upper end is anchored on the steel flange 5 of the top tower 4 through the anchorage 11, and the lower end is anchored and connected with the foundation ring 6 through the anchorage 11, as shown in FIG. 2 .

It can be seen from Fig. 4 and Fig. 5 that a number of anchoring connection blocks 12 are arranged axially on the inner side of the upper end surfaces of the bottom section tower tube 2 and the middle section tower tube 3 . The anchor connection block 12 is poured and formed simultaneously with the corresponding tower, and the reinforcement is densified inside to ensure that the concrete will not be damaged. The upper ends of the prestressed steel bars 7 and the prestressed steel bars 8 provided on the inside of the bottom tower 2 and the middle tower 3 are respectively anchored and connected to the corresponding anchor connection blocks 12 through the anchorage 11, and the lower end is downward along the inner side of the tower. Anchor to base ring.

It can also be seen from Fig. 2 that the upper end of the top tower 4 is provided with a steel flange 5 for fixing the wind turbine, and the upper end of the prestressed steel bar 9 inside the top tower is directly anchored to the steel flange 5. Above, the prestressed steel bar 9 runs downward along the inner walls of the top tower and all the lower towers, and the lower end is anchored on the foundation ring 6 .

The large-diameter tower tube of the present invention can be prefabricated by splitting and assembled on site. Joints 14 are reserved along the longitudinal edges between the petals, and the joints 14 are aligned longitudinally between the petals during assembly, bonded by active powder concrete, and reinforced with corrugated steel bars 13, and grouted after the assembly is completed glued. As shown in Figure 6 and Figure 7.

The tower is also provided with a number of longitudinal non-prestressed steel bars and circumferential non-prestressed steel bars, and the circumferential non-prestressed bars are arranged on the inner and outer sides of the longitudinal non-prestressed steel bars. The upper and lower sections of the tower are bonded by resin cement.

The segmented towers forming the tower frame of the present invention are all made of active powder concrete. Reactive powder concrete uses Portland cement as the cement, quartz sand as the aggregate, and basalt fiber at the same time to make the concrete more compact and increase the crack resistance of the concrete. It has high strength, high durability, and long service life. Lightweight and stable, the use of new reactive powder concrete reduces the weight compared with ordinary concrete wind power towers, greatly reduces transportation costs, and increases the corrosion resistance of wind power towers.

The whole prefabricated externally prestressed reactive powder concrete wind power tower is based on a new type of reactive powder concrete tower, and the tower is prestressed on site through external prestressed tensioning technology. The segmented towers are all prefabricated in the factory as a whole or split prefabricated. The overall prefabrication of the tower section is poured by vertical molding process, and the split prefabricated by horizontal prefabricated molding process. Assembled on site. During assembly, the bottom section of the tower is hoisted and placed on the foundation ring 6, and the upper and lower ends of the prestressed steel bars 7 of the bottom section of the tower 2 are respectively anchored on the anchor connection block 12 and the foundation ring 6. After the prestressed steel bars are anchored, the anchors 11 all need to be sealed with active powder concrete of the same strength. The joints of the split tower tube are inserted into corrugated steel bars in time and connected by grouting. The subsequent middle tower is hoisted and placed on the bottom tower, fixed after positioning, and the external prestressed steel bars are stretched. The towers are bonded with high-strength resin cement. The rest of the tower tubes are connected sequentially according to the above method to form the tower frame of the present invention.

Claims (7)

1. an assembling external prestressing RPC wind power tower, it comprises basis and some sections of tower cylinders, it is characterized in that: described basis is reinforced concrete foundation, wherein pre-embedded foundation ring; Described every section of tower cylinder is built and is formed by RPC, is cone barrel; The inner side of each section of tower cylinder is longitudinally provided with some prestressed reinforcements; After described prestressed reinforcement stretch-draw, upper end is anchored at the inner side, upper surface of tower cylinder, lower end and discharge ring anchor connection.

2. assembling external prestressing RPC wind power tower according to claim 1, is characterized in that: described prestressed reinforcement is uniformly distributed along tower cylinder inwall.

3. assembling external prestressing RPC wind power tower according to claim 1, it is characterized in that: section tower cylinder of the described end and inner side, interlude tower cylinder upper surface are axially arranged with some anchor connection pieces, anchor connection is on corresponding anchor connection piece respectively in the prestressed reinforcement upper end that section tower cylinder of the described end and interlude tower cylinder inner side arrange, and lower end is anchored on discharge ring.

4. assembling external prestressing RPC wind power tower according to claim 1, it is characterized in that: section tower cylinder upper end, described top is provided with the steel flanges of fixing wind power generating set, the prestressed reinforcement upper end of section tower cylinder inner side, top is directly anchored in this steel flanges, prestressed reinforcement is downward along top section tower cylinder and bottom all tower cylinders inwall, and lower end is anchored on discharge ring.

5. assembling external prestressing RPC wind power tower according to claim 1, is characterized in that: described tower cylinder distinguish is prefabricated, when assembled, between lobe and lobe, bonds by RPC, and with corrugated bar link enhancement.

6. assembling external prestressing RPC wind power tower according to claim 1, it is characterized in that: in described tower cylinder, be also provided with some longitudinal nonprestressed reinforcements and hoop nonprestressed reinforcement, described hoop non-prestressing tendon is arranged in the inside and outside both sides of longitudinal nonprestressed reinforcement.

7. assembling external prestressing RPC wind power tower according to claim 1, is characterized in that: between described tower cylinder upper-lower section, bond by resin-bonded mastic.

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