CN106640541B

CN106640541B - Tower drum for wind driven generator

Info

Publication number: CN106640541B
Application number: CN201610883149.8A
Authority: CN
Inventors: 郑家宁; 李亮
Original assignee: Shanghai Fengling New Energy Co ltd
Current assignee: Shanghai Fengling New Energy Co ltd
Priority date: 2016-10-08
Filing date: 2016-10-08
Publication date: 2022-04-29
Anticipated expiration: 2036-10-08
Also published as: CN106640541A

Abstract

The invention discloses a tower for a wind driven generator, which comprises: the tower tube foundation is a concrete structure with the strength grade reaching European standard C45; the tower drum body is of a concrete structure and comprises a plurality of tower drum sections which are sequentially connected in the vertical direction; the adapter, the adapter is the metalwork, the adapter is established the top of tower section of thick bamboo body. According to the tower drum disclosed by the invention, the concrete with the strength grade reaching European standard C45 is adopted to manufacture the tower drum foundation, so that the tower drum foundation can reach proper strength and toughness, and the cost can be reduced. The adapter is arranged at the top end of the tower barrel, so that the large weight and torque of the fan head can be borne, and the safety of the tower barrel is guaranteed.

Description

Tower drum for wind driven generator

Technical Field

The invention relates to the field of wind power generation technical equipment, in particular to a tower barrel for a wind driven generator.

Background

In the concrete tower tube structure disclosed in the related art, some tower tubes are of a steel structure, and some tower tubes are of a concrete structure. The steel structure tower cylinder has higher cost and difficult transportation, and is difficult to meet the construction requirement of the tower cylinder with large section and high height. The precast concrete tower barrel can economically build a large-scale wind generating set, so that the great attention is paid, but the top of the concrete tower barrel is easy to damage, and the safety of the concrete tower barrel needs to be improved. In addition, the tower drum foundation is a bearing foundation of the tower drum structure, and the proper concrete structure is selected to manufacture the tower drum foundation, so that the method is one of important means for guaranteeing the overall safety of the tower drum.

Disclosure of Invention

The present application is based on solving the technical problems existing in the prior art. To this end, the invention proposes a tower for a wind turbine, the safety quality of which can be improved.

The tower for the wind driven generator according to the embodiment of the invention comprises: the tower tube foundation is a concrete structure with the strength grade reaching European standard C45; the tower drum body is of a concrete structure and comprises a plurality of tower drum sections which are sequentially connected in the vertical direction; the adapter, the adapter is the metalwork, the adapter is established the top of tower section of thick bamboo body.

According to the tower drum for the wind driven generator, the concrete with the strength grade reaching European standard C45 is used for manufacturing the tower drum foundation, so that the tower drum foundation can achieve proper strength and toughness, and the cost can be reduced. The adapter is arranged at the top end of the tower barrel, so that the large weight and torque of the fan head can be borne, and the safety of the tower barrel is guaranteed.

In some embodiments, the tower foundation utilizes concrete having a slump of 180 ± 30.

In some embodiments, the concrete used for the tower base comprises, by weight, 0.63-0.65 parts of cement, 1.64-1.71 parts of sand, 1.92-1.98 parts of stones with the particle size of 5-12mm, 0.015-0.017 parts of water reducing agents, 0.23-0.25 parts of fly ash, 0.11-0.13 parts of mineral powder and 0.33-0.36 parts of blending water.

In some embodiments, the concrete used for the tower foundation is Portland cement with a strength rating of 42.5.

In some embodiments, the concrete material used for the tower foundation is washed sand.

In some embodiments, the concrete material used for the tower foundation includes gravel with a particle size of 5-12 mm.

In some embodiments, the tower foundation uses concrete material with a water-to-cement ratio of 0.33-0.36.

In some embodiments, the tower foundation utilizes a concrete material having a sand content of 44-47%.

In some embodiments, the tower foundation uses concrete with a fitting strength of 55 MPa.

In some embodiments, the tower foundation uses concrete having a compressive strength of 43-45MPa for 7 days.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a tower on the ground according to an embodiment of the present invention;

FIG. 2 is a schematic view of a tower according to an embodiment of the present invention at a junction of a tower foundation and a tower body;

FIG. 3 is a schematic structural diagram of a tower according to an embodiment of the present invention;

FIG. 4 is a schematic illustration of an assembly between adjacent full-circle tower sections according to an embodiment of the present invention;

FIG. 5 is an enlarged view of FIG. 4 at circle K;

FIG. 6 is a schematic structural diagram of a tower plate according to an embodiment of the present invention;

FIG. 7 is an enlarged view of FIG. 6 at circle A;

FIG. 8 is an enlarged view of FIG. 6 at circle B;

FIG. 9 is an enlarged view of FIG. 6 at circle C;

FIG. 10 is an enlarged view taken at circle D in FIG. 6;

FIG. 11 is an enlarged view of FIG. 6 at circle E;

FIG. 12 is a top view of a tower blade according to an embodiment of the present invention;

FIG. 13 is a schematic structural view of a full-circle tower section according to an embodiment of the present invention;

FIG. 14 is a schematic top view of an assembled tower section according to an embodiment of the present invention;

FIG. 15 is an enlarged view of FIG. 14 circled at J;

figure 16 is a perspective view of an adapter according to an embodiment of the present invention;

figure 17 is a schematic vertical cross-sectional view of an adapter according to an embodiment of the invention;

FIG. 18 is a schematic view of the positioning of the connection between the tower foundation and the tower body according to the embodiment of the invention.

Reference numerals:

a tower tube 1000,

A tower foundation 1, a base 11, a connecting platform 12, a prestressed duct 13 on the tower foundation,

A tower barrel body 2,

A tower section 20, an assembled tower section 21, a tower plate 211, a connecting side wall 2111, a whole-ring tower section 22,

The connecting hole 231, the vertical joint connecting post 232, the connecting rod 233, the threaded hole 2331, the connecting sleeve 234, the positioning slot 235, the reinforcing groove 241, the blocking member 251, the grouting gap 252, the grouting groove 253, the prestressed channel 261 on the tower section, the positioning hole 262, the positioning groove 263, the positioning screw 264, the head 2641, the rod 2642, the positioning post 265, the threaded section 2651, the guide cone section 2652, the leveling groove 271, the leveling gasket 272, the prestressed sleeve 281, the reinforcing sleeve 241, the reinforcing sleeve 251, the blocking member 251, the grouting gap 252, the grouting groove 253, the prestressed channel 261 on the tower section, the positioning hole 262, the positioning groove 263, the positioning screw 264, the head 2641, the rod 2642, the positioning post 265, the threaded section 2651, the guide cone section 2652, the leveling groove 271, the leveling gasket 272, the prestressed sleeve 281, the reinforcing sleeve and the reinforcing sleeve,

The adapter 3, an upper flange 31, a chassis 32, a vertical connecting wall 33, a prestress pore channel 34 on the small hole joint, a flange hole 35,

A positioning guide rod 5,

And a ground surface 2000.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The tower 1000 for a wind turbine according to an embodiment of the present invention is described below with reference to the accompanying drawings.

The tower 1000 for a wind turbine according to an embodiment of the present invention, as shown in fig. 1, includes: tower section of thick bamboo basis 1, tower section of thick bamboo body 2 and adapter 3.

At least a part of the tower foundation 1 is disposed below the ground 2000, that is, a part of the tower foundation 1 is buried underground, or the tower foundation 1 is entirely buried underground. The tower foundation 1 is used to support the entire tower 1000, so as to ensure the structural stability of the entire tower 1000.

Referring to fig. 1, a tower body 2 is a concrete structure, and the tower body 2 is formed in a cylindrical tube shape. The adapter 3 is established at the top of tower cylinder body 2, and adapter 3 is the metalwork, and adapter 3 can form into the cylindricality section of thick bamboo shape unanimous with tower cylinder body 2 shape. The wind driven generator comprises a fan (not shown in the figure), the head of the fan can be directly fixed on the adapter 3, and the head of the fan can also be fixed on the adapter 3 through a supporting frame.

In the embodiment of the present invention, the tower foundation 1, the tower body 2, and the adapter 3 are all important components of the tower 1000, but none of them is necessary, and the structures of these three components will be described below with reference to the accompanying drawings.

In the embodiment of the invention, the tower foundation 1 is a concrete structure with the strength level up to the european standard C45, and the tower foundation 1 is used as the bottommost part of the tower 1000, so that not only is the sufficient compression resistance and shock resistance required, but also because the tower foundation 1 is at least partially located underground, under special conditions, the tower foundation 1 may be submerged under water, and therefore, the concrete selection of the tower foundation 1 also meets the requirement of corrosion resistance.

Therefore, in the embodiment of the invention, the tower drum foundation 1 is made of concrete with the strength grade reaching European standard C45, so that the requirements can be met, and the problem of overhigh cost of the tower drum foundation 1 is solved.

Referring to tables 1 and 2 below, it can be seen that the concrete with strength level up to european standard C45 has suitable strength and elastic modulus, and can ensure the reliability of the concrete structure.

TABLE 1 Standard values of concrete Strength (N/mm)²)

TABLE 2 modulus of elasticity (. times.10) of concrete⁴N/mm²)

Specifically, the concrete mixing method adopted by the tower drum foundation 1 is mechanical mixing, and the concrete is compacted by means of vibration, so as to ensure that the tower drum foundation 1 is sufficiently compact.

Specifically, the slump of the concrete adopted by the tower base 1 is 180 +/-30. Here, slump is an index indicating the consistency of a concrete mixture, and the measurement is performed for the purpose of determining whether the concrete consistency satisfies a requirement and for the purpose of adjusting the mix ratio. The slump of the concrete is limited to 180 +/-30 so as to ensure the stable performance of the concrete.

In some embodiments, the concrete raw materials used for the tower foundation 1 include cement, sand, stones, additives, admixtures and water.

Among the concrete raw materials adopted by the tower drum foundation 1, the cement is ordinary portland cement with the strength grade of 42.5. Therefore, the strength of the concrete is improved on the premise of ensuring that the cement cost is not high.

Among the concrete raw materials adopted by the tower drum foundation 1, sand is washed sand, so that the mud content is low, and the quality of the prepared tower drum foundation 1 is good.

In the concrete raw materials adopted by the tower base 1, gravel is preferably selected from stones, and the stones can also be quartz stones.

The adaptive strength of the concrete adopted by the tower foundation 1 is 55 MPa. Here, the concrete test strength generally refers to a test mix based on a design strength before construction. The adaptive strength of the concrete is designed to be as high as 55MPa, so that the tower drum foundation 1 has higher strength after construction is finished.

In addition, the water-cement ratio of the concrete raw materials adopted by the tower base 1 is 0.33-0.36. Here, the water-cement ratio refers to the ratio of the amount of water used per cubic meter of concrete to the amount of all cement materials used. The sand rate of the concrete raw material adopted by the tower drum foundation 1 is 44-47% so as to ensure that the concrete has proper strength and workability.

In some embodiments, the concrete used in the tower foundation 1 comprises, by weight, 0.63-0.65 parts of cement, 1.64-1.71 parts of sand, 1.92-1.98 parts of stones with a particle size of 5-12mm, 0.015-0.017 parts of water reducing agent, 0.23-0.25 parts of fly ash, 0.11-0.13 parts of mineral powder, and 0.33-0.36 parts of blending water, as shown in table 3 below.

TABLE 3 concrete material usage per cubic meter and proportions

Wherein, in the concrete raw materials adopted by the tower drum foundation 1, the stones comprise gravels with the particle size of 5-12mm, and the water reducing agent is a polyhydroxy acid high-performance water reducing agent.

In the embodiment, the compressive strength of the concrete adopted by the tower tube foundation 1 is 43-45MPa in 7 days.

It should be noted that the mixing ratio of sand and gravel in the concrete raw material adopted by the tower foundation 1 explained above is calculated by the weight of the dry material, and the other indexes also need to meet the requirements of the building engineering specifications. The sand does not contain stones of 5mm or more, and the proportion can be adjusted appropriately according to the condition of the aggregate during actual construction.

Specific structures of the tower 1000 for a wind turbine according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 2, the tower foundation 1 includes a base 11 and a connecting platform 12, the base 11 is formed in a circular truncated cone shape, and the inside of the base 11 is hollow, so that bottom operations of an operator are facilitated, for example, operations such as tensioning and anchoring of prestressed tendons can be performed at the bottom of the tower 1000. The connecting platform 12 is arranged in the inner cavity of the base 11 and protrudes inwards, the upper end face of the connecting platform 12 exceeds the upper end face of the base 11, the connecting platform 12 is an annular platform, and the tower barrel body 2 is arranged on the connecting platform 12. Specifically, the connecting table 12 is provided with a through prestressed duct 13, and the prestressed duct 13 is used for tensioning the prestressed tendon.

In the embodiment of the present invention, as shown in fig. 3, the plurality of tower sections 20 includes at least one assembled tower section 21 and at least one integral ring tower section 22, the assembled tower section 21 is disposed on the tower foundation 1, the integral ring tower section 22 is disposed on the assembled tower section 21, each assembled tower section 21 includes a plurality of tower segments 211 sequentially connected end to end along the circumferential direction, and each integral ring tower section 22 is an integrally formed annular member.

Here, the tower section 20 at the lower part of the tower body 2 is designed to be prefabricated in segments and assembled into a cylinder on site, which is beneficial to reducing the difficulty of transportation and construction, and is beneficial to leveling in time when the bottom of the tower 1000 is initially built, and the tower section 20 at the upper part of the tower body 2 is designed to be prefabricated in a whole ring, which is beneficial to accelerating the construction speed. The structure is particularly suitable for the tower drum building of a tall wind driven generator, for example, in one embodiment of the invention, the total height of the tower drum 1000 is required to be 80-140 meters, and the tower drum 1000 is suitable for a wind driven generator of 1.5MW, 2MW, 2.5MW, 3MW, 3.5MW or 5 MW. In the tower 1000, dozens of tower sections 20 are built, and the tower section 21 assembled at the bottom is used as a basic part, and the structural construction quality is a key to the structural reliability of the whole tower 1000.

In a tall wind driven generator tower drum building, if the tower drum adopts a steel structure tower drum, the cost of the tower drum is too high. However, if the tower barrel is of a full concrete structure, due to the characteristic of low tensile strength of the concrete structure, when the top of the tower barrel bears heavy weight and the torque is very large, the part of the top end of the tower barrel, which is connected with the fan head, is easy to crush and break. In the embodiment of the invention, the metal adapter 3 is arranged at the top of the tower tube 1000, and the adapter 3 has the advantages of light weight, good toughness, good ductility, strong integrity and excellent anti-seismic performance, so that the safety of the tower tube 1000 is guaranteed.

In the tower 1000 for a wind power generator, some of the tower bodies 2 are formed in a straight cylindrical shape, and some of the tower bodies 2 are formed in a tapered shape, and the sectional area of the tower bodies 2 is gradually reduced upward, so that the sectional size of the assembled tower section 21 is larger than that of the whole ring tower section 22. With respect to the tapered tower body 2, it will be appreciated that although the cross-sectional dimension of the bottom tower segment 20 is relatively large, the whole ring is prefabricated and is inconvenient to hoist and transport. However, the upper part of the tower 1000 is gradually retracted, so that the sectional size is continuously reduced, and the whole ring prefabrication condition is actually achieved.

In the embodiment of the invention, different prefabrication modes are adopted for tower sections 20 with different section sizes of the tower 1000, namely, the tower section 20 with the large section size at the lower part is prefabricated in a segmented mode and assembled into a cylinder on site, and the tower section 20 with the small section size at the upper part is directly prefabricated and formed in a prefabrication factory and then is transported to the site for hoisting and installation, so that the construction process is simplified, and the construction quality is ensured. By the operation, the requirement of manufacturing the lower large-section tower barrel section 20 in a segmented mode is met, the construction procedures of the upper small-section tower barrel section 20 are reduced, the construction cost is reduced, and the construction efficiency is improved.

In summary, in the tower 1000 for the wind turbine generator according to the embodiment of the present invention, the lower tower barrel section 20 of the tower barrel body 2 is prefabricated in segments and assembled into a barrel on site, and the upper tower barrel section 20 of the tower barrel body 2 is prefabricated in a complete ring, which is beneficial to leveling construction of the tower barrel 1000 structure, and in the conical tower barrel 1000 structure, the large-sized tower barrel section 20 is prefabricated in segments, which is convenient for transportation and hoisting, and the small-sized tower barrel section 20 is prefabricated in a complete ring, which can reduce construction cost and improve construction efficiency. The adapter 3 is arranged at the top end of the tower drum 1000, so that the large weight and torque of the fan head can be borne, and the safety of the tower drum 1000 is guaranteed.

In some embodiments, tower 1000 is formed in a cylindrical or conical shape. Each of the tower segments 211 in the assembled tower section 21 is an arc-shaped tower segment 211, thereby facilitating manufacturing.

Specifically, as shown in fig. 3, the assembled tower sections 21 are multiple and sequentially connected in the vertical direction, and the joints of the tower pieces 211 on two adjacent assembled tower sections 21 are staggered. In some embodiments, each assembled tower section 21 includes two tower segments 211, each tower segment 211 having a center angle of 180 degrees, and the two tower segments 211 may form a 360-degree tower section 20 when butted together. The tower pieces 211 of two adjacent assembled tower drum sections 21 are staggered by an included angle of 90 degrees, so that the tower drum 1000 is attractive in whole, stable in structure and easy to construct.

Of course, the shape of the tower body 2 in the embodiment of the invention is not limited to the above cylindrical shape or conical cylindrical shape, the tower body 2 may also be formed into a polygonal shape, and the number of the tower segments 211 in the corresponding assembled tower segment 21 may also be determined by actual requirements.

During construction of the tower 1000, the quality of the connection between the tower segments 20 is one of the key factors affecting the overall quality of the tower 1000. The connecting and positioning structure between the tower segments 20 will be described with reference to the drawings.

It should be noted that, according to the construction requirements of the tower drum, a bonding layer needs to be arranged between every two adjacent tower drum segments, and the bonding layer is uniformly and densely filled in the horizontal joint between the adjacent tower drum segments 20, so that the connection strength between the adjacent tower drum segments 20 can be ensured, and the overall strength, quality and sealing performance of the tower drum 1000 can be ensured. Alternatively, the tie layer may be a thixotropic mortar or an epoxy resin.

When the tower drum 1000 is constructed, each section of the tower drum section 20 is constructed, the tower drum section 20 needs to be leveled again, each tower drum section 20 is ensured to be horizontally placed, the inclination of the tower drum section 20 is prevented, and the molding quality of the tower drum 1000 is improved.

In an embodiment of the present invention, the tower section 20 is leveled by the action of the leveling shims 272.

Specifically, as shown in fig. 4 and 5, in each two adjacent tower sections 20, a plurality of leveling spacers 272 are disposed on the top of the tower section 20 located below, and the leveling spacers 272 are spaced around the center of the tower section 20. Therefore, by arranging the leveling spacers 272 and adjusting the upper surfaces of the leveling spacers 272 to the same horizontal height, and then hoisting the tower section 20 above to the top of the tower section 20 below, the bottom of the tower section 20 above can be directly supported on the upper surfaces of the leveling spacers 272, and the leveling spacers 272 support the lower position, thereby achieving the leveling purpose.

Here, after a plurality of leveling pads 272 are provided on the top of the lower tower segment 20 of every two adjacent tower segments 20, thixotropic mortar or epoxy resin is spread on the top of the lower tower segment 20, and the lower tower segment 20 is screwed on the leveling pads 272 after spreading, so that the thixotropic mortar or epoxy resin can be well adhered to the tower segments 20 on the upper and lower sides. After the thixotropic mortar or epoxy resin is dried and hardened to form the adhesive layer, the adjacent two tower segments 20 can be well connected into a whole.

Wherein, when spreading the tie coat, guarantee that thixotropic mortar or epoxy need not stick to the upper surface of leveling gasket 272, avoid influencing the plane degree of a plurality of leveling gaskets 272. In addition, the leveling shims 272 may preferably be steel sheets to ensure that when the upper tower section 20 is placed over the plurality of leveling shims 272, the leveling shims 272 are not over compressed to destroy the flatness of the plurality of leveling shims 272.

According to the tower 1000 for the wind driven generator, the tower sections 20 are leveled through the leveling gaskets 272, the construction process is simplified, the construction efficiency is improved, the adjacent tower sections 20 are effectively connected, and therefore the butt joint precision is improved.

In some embodiments, as shown in fig. 4 and 5, in each adjacent two tower sections 20, the top of the tower section 20 located below is provided with a plurality of leveling grooves 271, and the leveling gasket 272 is provided in the leveling grooves 271. Therefore, the leveling gaskets 272 can be conveniently installed and fixed, the leveling gaskets 272 can be positioned at set positions, and the leveling between the adjacent tower cylinder sections 20 can be conveniently and quickly realized.

Specifically, as shown in fig. 13, the leveling grooves 271 are multiple, and the leveling grooves 271 are uniformly distributed along the circumferential direction of the tower segment 20 at intervals, so as to ensure that the leveling spacers 272 can be well fixed and positioned.

In fig. 13, the top of the whole ring tower section 22 is provided with four leveling grooves 271, and the four leveling grooves 271 are uniformly spaced along the circumferential direction of the whole ring tower section 22.

In fig. 12, the top of the semicircular tower 211 is provided with two leveling grooves 271, and the two leveling grooves 271 are spaced apart along the circumferential direction of the tower 211.

In some embodiments, as shown in FIG. 10, the depth of the leveling groove 271 is 5mm, the width w1 of the leveling groove 271 is not more than half of the radial width n of the tower segment 20, and the length w2 of the leveling groove 271 is 1.5 times of the radial width n of the tower segment 20, wherein the radial width n of the tower segment 20 is equal to the difference between the outer radius and the inner radius of the tower segment 20. In addition, the center line of the leveling groove 271 in the width direction is located on the bisector center line of the tower segment 20, that is, the leveling groove 271 is equidistant from the inner circumferential wall and the outer circumferential wall of the tower segment 20.

Advantageously, the shape and area of the leveling shim 272 are consistent with the leveling groove 271 in which it is located, i.e., the planar size of the leveling shim 272 is the same as the size of the leveling groove 271. Optionally, the leveling shim 272 has a thickness of 0.5mm, 1mm, 2mm, 5mm, or 10 mm.

In some examples, four leveling spacers 272 are disposed in each leveling groove 271, and the thicknesses of the four leveling spacers 272 may be the same or different to facilitate adjustment.

In some embodiments of the present invention, the height between the upper surface of the leveling shim 272 and the upper surface of the tower section 20 below between every two adjacent tower sections 20 is not less than 10 mm.

In the embodiment of the present invention, as shown in fig. 4 and 5, between every two adjacent tower sections 20, one of the tower sections 20 is provided with a positioning groove 263, and the other tower section 20 is provided with a positioning column 265 for being inserted and fitted into the positioning groove 263. By the arrangement, correct assembly positions between every two adjacent tower barrel sections 20 are ensured, and subsequent operation can be smoothly carried out.

Specifically, as shown in fig. 10, the positioning post 265 includes a threaded section 2651 and a tapered section 2652, the threaded section 2651 is provided with an external thread, the cross-sectional area of the tapered section 2652 is gradually reduced in a direction away from the threaded section 2651, and as shown in fig. 11, the positioning groove 263 is formed in a shape adapted to the tapered section 2652. The positioning post 265 is equivalent to a positioning guide cone, and can complete positioning work by using the guide cone section 2652 of the head, and the positioning can be facilitated by the guide cone section 2652 of a cone cylinder.

Optionally, as shown in fig. 10, a pre-embedded positioning screw 264 is disposed at the top of each tower section 20, the positioning post 265 is screwed on the positioning screw 264, the hoisting device can be screwed on the positioning screw 264 to hoist the tower section 20 when the tower 1000 is constructed, and the size of the positioning screw 264 depends on the hoisting weight of the tower.

In some embodiments, as shown in fig. 10, the positioning screw 264 includes a head 2641 and a shaft 2642, the head 2641 is disposed at a top end of the shaft 2642, the head 2641 is formed in a cylindrical shape and is provided with an internal thread, and a cross-section of a portion of the shaft 2642 is enlarged in size. The shaft 2642 of the positioning screw 264 may be formed in the shape of a conventional bolt to increase the contact area with the concrete surrounding the tower segment 20 in which it is located, thereby increasing the connection strength of the positioning screw 264. Of course, the rod 2642 of the positioning screw 264 may be formed in other shapes, such as a T-shape, an L-shape, etc., and is not limited herein.

In some embodiments, as shown in fig. 4-6, each tower section 20 has a pre-stressed channel 261, the pre-stressed channel 261 being used to pass through the tendons. The pre-stress ducts 261 are provided therein with pre-stress sleeves 281, as shown in fig. 9, an upper end of each pre-stress sleeve 281 is higher than an upper end of the corresponding pre-stress duct 261, and as shown in fig. 11, a lower end of each pre-stress sleeve 281 is lower than a lower end of the corresponding pre-stress duct 261, so that the pre-stress duct 261 located at a lower portion of the pre-stress sleeve 281 forms the positioning hole 262.

In each adjacent two tower segments 20, as shown in FIG. 5, the upper end of the pre-stressed sleeve 281 in the lower tower segment 20 fits into the alignment hole 262 in the upper tower segment 20. Therefore, when the upper tower segment 20 of the two adjacent tower segments 20 is hoisted to the lower tower segment 20, the upper end of the pre-stressed sleeve 281 of the lower tower segment 20 of the two adjacent tower segments 20 is matched with the positioning hole 262 in the upper tower segment 20, so that the pre-stressed sleeve 281 of the lower tower segment 20 of the two adjacent tower segments 20 is accurately and quickly connected with the pre-stressed sleeve 281 of the upper tower segment 20, and the later-stage smooth penetration of the pre-stressed ribs is ensured, and the final forming quality of the whole-ring tower segment 22 can be ensured.

Wherein, the upper end surface of the pre-stress sleeve 281 is always higher than the upper surface of the bonding layer. Therefore, the bonding layer can be prevented from blocking the upper port of the pre-stress sleeve 281, and the smoothness of connection between two adjacent tower sections 20 is ensured.

Alternatively, the positioning hole 262 may be formed in a tapered cylindrical shape, and the cross section of the positioning hole 262 is gradually reduced in the bottom-up direction. Therefore, the upper end of the pre-stress sleeve 281 is convenient to be matched with the corresponding positioning hole 262, and the positioning speed and the matching speed can be improved.

In the embodiment of the present invention, the lowermost tower segment 20 of the tower body 2 also needs to be positioned when being mounted on the tower foundation 1, and the lowermost tower segment 20 can be positioned by using the pre-stressed duct 261 on the tower segment 20 and the pre-stressed duct 13 on the tower foundation 1.

Specifically, as shown in FIG. 18, the bottom-most assembled tower segment 21 may be positioned by the positioning guide 5, and the positioning guide 5 may pass through the pre-stressed duct 261 of the bottom-most assembled tower segment 21 and the pre-stressed duct 13 of the tower foundation 1. For example, the positioning guide rods 5 may be inserted into the pre-stressed ducts 261 of the assembled tower cylinder section 21, and then the assembled tower cylinder section 21 is hoisted onto the tower foundation 1, so that the lower ends of the positioning guide rods 5 are inserted into the corresponding pre-stressed ducts 13 of the tower foundation 1, thereby completing the positioning of the bottom-most assembled tower cylinder section 21.

Bonding layers are also required between every adjacent two of the tower segments 211 in the assembled tower section 21.

In some embodiments of the invention, as shown in FIG. 6, each of the towers 211 has a connecting sidewall 2111 adjacent to the other tower 211, with the connecting sidewalls 2111 of each adjacent two towers 211 being spaced apart. As shown in fig. 14 and 15, two barriers 251 are disposed between the connecting side walls 2111 of each two adjacent tower plates 211, the two barriers 251 are spaced apart in the radial direction of the tower 1000, a grout gap 252 with a closed periphery is defined between the two barriers 251 and the connecting side walls 2111 on both sides, and the grout is filled in the grout gap 252 to form a bonding layer.

The grouting gap 252 is used for grouting mortar, and when the mortar is poured into the grouting gap 252, the mortar in the grouting gap 252 can be prevented from overflowing inwards and outwards by the blocking action of the two blocking pieces 251, so that the leakage of the mortar can be prevented, the grouting tightness can be ensured, the connection strength between the tower pieces 211 can be ensured, and the forming quality of the assembled tower tube section 21 can be improved.

To sum up, by arranging the two blocking pieces 251 between the connecting side walls 2111 of the two tower pieces 211 connected with each other to define the grouting gap 252 closed inside and outside, the problems of slurry leakage and complex process easily occurring when the assembled tower tube section 21 with vertical joints is poured are solved, the pouring quality of the prefabricated tower pieces 211 at the vertical joints is ensured, the grouting tightness is ensured, and the forming quality of the assembled tower tube section 21 can be improved.

Specifically, the width s of the gap defined between the connecting side walls 2111 of two tower pieces 211 connected to each other ranges from 5mm to 20mm, and for example, the width s of the gap may be 10 mm.

Alternatively, the barrier 251 may be a flat plate or a cylindrical tube, but the cross section of the barrier 251 may be arbitrarily set according to actual construction needs.

In some embodiments, as shown in FIGS. 6-8, two positioning slots 235 are formed in the connecting sidewall 2111 of each of the trays 211, and the two positioning slots 235 are respectively disposed adjacent to the inner and outer edges of the tray 211. As shown in FIG. 15, the two positioning grooves 235 in the connecting side walls 2111 of the two tower pieces 211 connected to each other are opposed, respectively, and each of the stoppers 251 is fitted in the two positioning grooves 235 in the opposed positions in the connecting side walls 2111 of the two tower pieces 211 connected to each other. Thus, by fitting each of the stoppers 251 in the space defined by the opposing two positioning grooves 235, the stoppers 251 can be positioned, preventing the stoppers 251 from moving. Optionally, the horizontal projection of detent 235 is triangular, rectangular, or arcuate.

In some embodiments of the present invention, referring to fig. 6 and 7, a grouting groove 253 is provided on one of the connection side walls 2111 of two tower segments 211 connected to each other, one end of the grouting groove 253 is located between the two positioning grooves 235 of the tower segment 211 where the grouting groove 253 is located, the other end of the grouting groove 253 penetrates through the outer wall surface of the tower segment 211, and the grouting groove 253 is used for connecting a grouting injection pipe. Therefore, the grouting gap 252 can be grouted through the grouting groove 253, so that grouting is convenient.

In some embodiments of the present invention, as shown in FIGS. 6-8, the connecting sidewall 2111 of each of the tower plates 211 is provided with a plurality of reinforcing grooves 241, and each of the plurality of reinforcing grooves 241 is provided between two corresponding barriers 251. This increases the contact area between the grout in the grout gap 252 and the connecting side walls 2111, thereby increasing the strength of the connection between the two tower pieces 211.

In fig. 7, the reinforcing groove 241, which is the nearest to the bottom of the tower piece 211, among the plurality of reinforcing grooves 241 arranged in the height direction of the tower piece 211 communicates toward the outside, and the reinforcing groove 241 constitutes the grout groove 253. That is, when the grouting groove 253 is processed, the reinforcing groove 241 closest to the bottom of the tower piece 211 is extended outward and penetrates the outer wall surface of the tower piece 211, and the processing is simple.

In some embodiments of the present invention, as shown in fig. 6, between every two adjacent tower pieces 211, the connecting sidewall 2111 of one tower piece 211 is provided with a connecting hole 231, and the other tower piece 211 is provided with a vertical seam connecting column 232 inserted and matched with the connecting hole 231. By the arrangement, effective connection can be provided, the construction process is simplified, and the construction efficiency is improved.

Optionally, the vertical joint connecting columns 232 are uniformly arranged vertically, the number of the vertical joint connecting columns 232 is 10-15 according to the stress condition, and the number of the connecting holes 231 and the number of the threaded holes 2331 are the same as that of the vertical joint connecting columns 232.

Alternatively, the vertical joint connecting column 232 may be made of a connecting steel bar, one end of the connecting steel bar is threaded and then can be connected to the threaded hole 2331, and a torque of 80-120N · m needs to be applied during connection to ensure connection reliability.

In the example of fig. 14 and 6, the assembled tower section 21 comprises two tower segments 211 connected end to end with each other, each tower segment 211 being semi-circular. Each tower plate 211 is provided with two connecting side walls 2111, one connecting side wall 2111 of each tower plate 211 is embedded with the connecting sleeve 234, the connecting sleeve 234 is provided with a connecting hole 231, the connecting side wall 2111 of the other tower plate 211 is embedded with the connecting rod 233, the connecting rod 233 is in an L shape, and the connecting rod 233 is provided with a threaded hole 2331. One end of the vertical seaming post 232 is screwed into the head of the connecting rod 233 by a screw, and the other end of the vertical seaming post 232 is inserted into the corresponding connecting sleeve 234. Thereby, the connection strength between the plurality of tower pieces 211 can be ensured.

When grouting is performed in the grouting gap 252, mortar may flow into the gap between the connection bar 233 and the connection sleeve 234, so that the connection bar 233 and the connection sleeve 234 may be more stably connected, further enhancing the connection strength between the plurality of tower pieces 211.

Here, the vertical joint connection post 232 is screwed on the connection rod 233, and the vertical joint connection post 232 is a non-embedded part.

It should be noted that, if the vertical joint connecting column is set as an embedded part, the vertical joint connecting column is usually embedded into the tower piece mold in advance, and the vertical joint connecting column needs to be poured together with the tower piece. However, since the vertical joint studs need to protrude through the tower concrete to connect with other towers, corresponding openings in the mold are required. The process of opening the holes in the closed mould is complex, and the problems of slurry leakage and the like are easily caused in the pouring process, so that the quality of the prefabricated part is influenced. In this way, the operation of assembling and connecting different tower pieces is complicated, and the grouting tightness is poor.

Therefore, in the embodiment of the present invention, in order to solve the above problem of the vertical joint connecting column 232, only the connecting rod 233 and the connecting sleeve 234 are pre-embedded, and there is no need to form a hole on the mold, and the vertical joint connecting column 232 is installed after demolding. Meanwhile, when different tower pieces 211 are assembled and connected, a leveling device and a vertical joint pipe are designed, and a bottom grouting method is adopted, so that the construction process is simplified, the sealing performance and the grouting efficiency are improved, and the connection strength is ensured.

In some embodiments, as shown in fig. 16 and 17, the adapter 3 includes an upper flange 31, a bottom plate 32, and a vertical connecting wall 33, the bottom plate 32 is formed in a circular disk shape, the upper flange 31 is also formed in a circular disk shape, the upper flange 31 and the bottom plate 32 are concentrically arranged in parallel, the vertical connecting wall 33 is connected between the upper flange 31 and the outer edge of the bottom plate 32, the vertical connecting wall 33 is formed in a ring-shaped wall, and the adapter 3 is integrally formed in a cylindrical shape or a cone-shaped shape. Wherein, when the profile cross-sections of the upper flange 31 and the chassis 32 are equal, the adapter 3 is formed in a cylindrical shape as a whole. When the contour sectional area of the chassis 32 is larger than that of the upper flange 31, the vertical connecting wall 33 forms a taper shape in which the contour cross section is gradually reduced upward, and the adapter 3 is integrally formed in a taper cylinder shape. Wherein, the upper flange 31 is provided with a flange hole 35 for fixing the head of the blower or for fixing the support frame, and the head of the blower is fixed on the support frame. The chassis 32 is provided with a prestressed duct 34 for fixing prestressed tendons on the tower 1000.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A tower for a wind turbine, characterized in that the tower has an overall height of 80-140 meters, the tower comprising:

the tower drum foundation comprises a base and a connecting platform, wherein the base is hollow, the connecting platform is arranged in an inner cavity of the base and protrudes inwards, the upper end surface of the connecting platform exceeds the upper end surface of the base, the connecting platform is an annular platform, the connecting platform is provided with a through prestress pore channel for tensioning a prestress rib, the tower drum foundation is a concrete structure with the strength grade reaching European standard C45, concrete adopted by the tower drum foundation is compacted by vibration and calculated according to weight components, and the concrete comprises 0.63-0.65 part of cement, 1.64-1.71 parts of sand, 1.92-1.98 parts of stone with the particle size of 5-12mm, 0.015-0.017 part of water reducing agent, 0.23-0.25 part of fly ash, 0.11-0.13 part of mineral powder and 0.33-0.36 part of mixing water, in concrete raw materials adopted by the tower barrel foundation, cement is ordinary portland cement with the strength grade reaching 42.5, sand is washed sand, stones comprise gravels with the particle size of 5-12mm, the water-cement ratio is 0.33-0.36, the sand rate is 44-47%, the adaptive strength of concrete is 55MPa, the compressive strength of concrete is 43-45MPa in 7 days, and the slump of concrete is 180 +/-30;

the tower barrel body is of a concrete structure and is arranged on the connecting platform, the tower barrel body comprises a plurality of tower barrel sections which are sequentially connected along the vertical direction, each tower barrel section is provided with a prestressed pore channel for penetrating prestressed tendons, a prestressed sleeve is arranged in the prestressed pore channel, the upper end of the prestressed sleeve is higher than the upper end of the prestressed pore channel, the lower end of the prestressed sleeve is lower than the lower end of the prestressed pore channel so that the prestressed pore channel positioned at the lower part of the prestressed sleeve forms a positioning hole, the upper end of the prestressed sleeve positioned in the lower tower barrel section in the adjacent tower barrel sections is matched in the positioning hole positioned in the upper tower barrel section, the tower barrel sections comprise a plurality of assembled tower barrel sections and at least one integral annular tower barrel section, and the cross section size of the assembled tower barrel section is larger than that of the integral annular tower barrel section, each assembled tower cylinder section comprises a plurality of tower pieces which are sequentially connected end to end along the circumferential direction, each whole-ring tower cylinder section is an integrally formed annular piece, each tower piece is provided with a connecting side wall, two blocking pieces are arranged between the connecting side walls of every two adjacent tower pieces and are spaced in the radial direction of the tower cylinder, a grouting gap with closed periphery is defined between the two blocking pieces and the connecting side walls on the two sides, a grouting material is filled in the grouting gap to form a bonding layer for connecting the adjacent tower pieces, the joints of the tower pieces of the adjacent assembled tower cylinder sections are arranged in a staggered mode, a plurality of leveling grooves are formed in the tops of the tower cylinder sections below the adjacent assembled tower cylinder sections, and leveling gaskets are arranged in the leveling grooves; the adapter, the adapter is the metalwork, the adapter is established the top of tower section of thick bamboo body.