1. The utility model provides an adopt wind-powered electricity generation of bolt U ring connection to mix prefabricated tower section of thick bamboo of tower which characterized in that: this wind-powered electricity generation mixes tower prefabricated tower section of thick bamboo is assembled by tower section of thick bamboo segmental arc piece and tower section of thick bamboo straight section piece and is constituted, wherein tower section of thick bamboo segmental arc piece with tower section of thick bamboo straight section piece has the connection face respectively, the connection face of tower section of thick bamboo segmental arc piece with tower section of thick bamboo straight section piece is connected the looks adaptation, both connect the face and be provided with U type bolted connection device, U type bolted connection device will connect the face connection fixed, make tower section of thick bamboo segmental arc piece with tower section of thick bamboo straight section piece constitutes wholly.

2. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 1, is characterized in that: the U-shaped bolt connecting device comprises an unthreaded sleeve, a base plate, a low-yield-strength high-plasticity sleeve, a high-strength bolt and a U-shaped sleeve, wherein the unthreaded sleeve is embedded in the arc-shaped section of the tower barrel, the U-shaped sleeve is embedded in the straight section of the tower barrel and corresponds to the unthreaded sleeve in position, the high-strength bolt is screwed into the unthreaded sleeve and fixedly connected with the U-shaped sleeve, the low-yield-strength high-plasticity sleeve is located between the unthreaded sleeve and the high-strength bolt, and the base plate is located between a nut of the high-strength bolt and the connecting surface of the arc-shaped section of the tower barrel.

3. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 2, is characterized in that: the backing plate is provided with a hole through which the low-yield-strength high-plasticity sleeve can pass, and the aperture of the hole is smaller than that of a nut of the high-strength bolt; the outer diameter of the unthreaded sleeve is larger than the holes in the base plate, the inner diameter of the unthreaded sleeve is larger than the outer diameter of the low-yield-strength high-plasticity sleeve, and the length of the unthreaded sleeve is equal to the thickness of the arc-shaped section of the tower barrel; the inner diameter of the low-yield-strength high-plasticity sleeve is larger than the outer diameter of the U-shaped sleeve.

4. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 2, is characterized in that: the U-shaped sleeve comprises a bent section and a flat section, the two ends of the bent section are respectively connected with the flat section, the bent section is embedded in the flat section split piece of the tower barrel, and part of the flat section extends out of the surface of the connecting surface of the flat section split piece of the tower barrel.

5. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 4, is characterized in that: the bending section is solid U-shaped steel, and the straight section is a sleeve with internal threads.

6. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 2, is characterized in that: the outer diameter of the low yield strength high plasticity sleeve is smaller than the inner diameter of the unthreaded sleeve, and the length of the low yield strength high plasticity sleeve is longer than the unthreaded sleeve.

7. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 2, is characterized in that: the unthreaded sleeve is welded on the longitudinal steel bars of the tower barrel arc-shaped section segment.

8. The wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to claim 2, is characterized in that: the arc-shaped segment of the tower drum is internally provided with two unthreaded sleeves corresponding to the U-shaped sleeves, the axes of the unthreaded sleeves are perpendicular to the axes of the arc-shaped segment of the tower drum, and the two unthreaded sleeves are parallel.

9. The method for assembling the prefabricated tower barrel of the wind power hybrid tower connected by the U-shaped bolts according to any one of claims 1 to 8, wherein the method comprises the following steps: the assembling method comprises the following steps:

embedding a non-threaded sleeve in an arc section segment of a tower drum, embedding a U-shaped sleeve in a straight section segment of the tower drum, and enabling the straight section of the U-shaped sleeve to partially extend out of the surface of a connecting surface of the U-shaped sleeve;

hoisting the arc-shaped section fragments of the tower drum to a designed position, hoisting the straight section fragments of the tower drum to a corresponding position, aligning the extending part of the U-shaped sleeve and inserting the extending part into the unthreaded sleeve, so that the arc-shaped section fragments of the tower drum and the straight section fragments of the tower drum are aligned and form primary positioning;

inserting a low-yield-strength high-plasticity sleeve into the unthreaded sleeve, covering a base plate, screwing in a high-strength bolt to enable the low-yield-strength high-plasticity sleeve to be gradually pressed into the unthreaded sleeve, and applying pretightening force to the high-strength bolt after the low-yield-strength high-plasticity sleeve is completely pressed into the unthreaded sleeve to complete assembling connection.

10. The method for assembling the wind power hybrid tower prefabricated tower barrel connected by the bolt U rings according to the claim 9, is characterized in that: the unthreaded sleeve is welded with the steel bars of the arc-shaped section fragments of the tower barrel, and the U-shaped sleeve is welded with the steel bars of the straight section fragments of the tower barrel; and pouring the component after welding.

Background

With the development of the wind power industry, wind power resources are continuously developed and utilized, and the demand of the wind power hybrid tower is increasingly seen under the form. Traditional tower section of thick bamboo adopts cast-in-place formula, but can produce the engineering time long like this, and the difficult scheduling problem that guarantees of construction quality winter, and adopts precast concrete tower section of thick bamboo to have the reduction of erection time, solves the characteristics of construction difficulty in winter.

The traditional prefabricated part connecting and fastening device adopts a bolt connecting mode, the connecting mode usually causes hole aligning difficulty and often needs secondary hole opening, and the rigidity is insufficient. Meanwhile, the bearing capacity is not easy to guarantee.

Disclosure of Invention

The invention aims to provide a wind power hybrid tower prefabricated tower cylinder connected by bolt U rings and a construction method thereof according to the defects of the prior art, the tensile U-shaped bolt connecting device is used, so that the rigidity of a connecting surface is increased, the pulling resistance of a sleeve is improved, and the U-shaped bolts are also used as shear pieces from the vertical stress angle to improve the shearing resistance among the plate sections; the sleeve gaps are filled with the low-yield-strength high-plasticity sleeves, so that the bolt connection rigidity is improved, stress concentration is weakened, hole aligning difficulty is reduced, relative slippage between the concrete prefabricated part with unstable precision and the bolts is reduced, and high-strength and high-precision assembling between the tower barrel sub-pieces is realized.

The purpose of the invention is realized by the following technical scheme:

the utility model provides an adopt wind-powered electricity generation of bolt U ring connection to mix prefabricated tower section of thick bamboo of tower which characterized in that: this wind-powered electricity generation mixes tower prefabricated tower section of thick bamboo is assembled by tower section of thick bamboo segmental arc piece and tower section of thick bamboo straight section piece and is constituted, wherein tower section of thick bamboo segmental arc piece with tower section of thick bamboo straight section piece has the connection face respectively, the connection face of tower section of thick bamboo segmental arc piece with tower section of thick bamboo straight section piece is connected the looks adaptation, both connect the face and be provided with U type bolted connection device, U type bolted connection device will connect the face connection fixed, make tower section of thick bamboo segmental arc piece with tower section of thick bamboo straight section piece constitutes wholly.

The U-shaped bolt connecting device comprises an unthreaded sleeve, a base plate, a low-yield-strength high-plasticity sleeve, a high-strength bolt and a U-shaped sleeve, wherein the unthreaded sleeve is embedded in the arc-shaped section of the tower barrel, the U-shaped sleeve is embedded in the straight section of the tower barrel and corresponds to the unthreaded sleeve in position, the high-strength bolt is screwed into the unthreaded sleeve and fixedly connected with the U-shaped sleeve, the low-yield-strength high-plasticity sleeve is located between the unthreaded sleeve and the high-strength bolt, and the base plate is located between a nut of the high-strength bolt and the connecting surface of the arc-shaped section of the tower barrel.

The backing plate is provided with a hole through which the low-yield-strength high-plasticity sleeve can pass, and the aperture of the hole is smaller than that of a nut of the high-strength bolt; the outer diameter of the unthreaded sleeve is larger than the holes in the base plate, the inner diameter of the unthreaded sleeve is larger than the outer diameter of the low-yield-strength high-plasticity sleeve, and the length of the unthreaded sleeve is equal to the thickness of the arc-shaped section of the tower barrel; the inner diameter of the low-yield-strength high-plasticity sleeve is larger than the outer diameter of the U-shaped sleeve.

The U-shaped sleeve comprises a bent section and a flat section, the two ends of the bent section are respectively connected with the flat section, the bent section is embedded in the flat section split piece of the tower barrel, and part of the flat section extends out of the surface of the connecting surface of the flat section split piece of the tower barrel.

The bending section is solid U-shaped steel, and the straight section is a sleeve with internal threads.

The outer diameter of the low yield strength high plasticity sleeve is smaller than the inner diameter of the unthreaded sleeve, and the length of the low yield strength high plasticity sleeve is longer than the unthreaded sleeve.

The unthreaded sleeve is welded on the longitudinal steel bars of the tower barrel arc-shaped section segment.

The arc-shaped segment of the tower drum is internally provided with two unthreaded sleeves corresponding to the U-shaped sleeves, the axes of the unthreaded sleeves are perpendicular to the axes of the arc-shaped segment of the tower drum, and the two unthreaded sleeves are parallel.

According to the assembling method of the wind power hybrid tower prefabricated tower cylinder connected by the bolt U ring, the assembling method is characterized in that: the assembling method comprises the following steps:

embedding a non-threaded sleeve in an arc section segment of a tower drum, embedding a U-shaped sleeve in a straight section segment of the tower drum, and enabling the straight section of the U-shaped sleeve to partially extend out of the surface of a connecting surface of the U-shaped sleeve;

hoisting the arc-shaped section fragments of the tower drum to a designed position, hoisting the straight section fragments of the tower drum to a corresponding position, aligning the extending part of the U-shaped sleeve and inserting the extending part into the unthreaded sleeve, so that the arc-shaped section fragments of the tower drum and the straight section fragments of the tower drum are aligned and form primary positioning;

inserting a low-yield-strength high-plasticity sleeve into the unthreaded sleeve, covering a base plate, screwing in a high-strength bolt to enable the low-yield-strength high-plasticity sleeve to be gradually pressed into the unthreaded sleeve, and applying pretightening force to the high-strength bolt after the low-yield-strength high-plasticity sleeve is completely pressed into the unthreaded sleeve to complete assembling connection.

The unthreaded sleeve is welded with the steel bars of the arc-shaped section fragments of the tower barrel, and the U-shaped sleeve is welded with the steel bars of the straight section fragments of the tower barrel; and pouring the component after welding.

The invention has the advantages that: the design of the pre-embedded U-shaped screw improves the connection rigidity and the integrity of the component is enhanced; the design of the large sleeve on the small screw reduces the hole aligning difficulty; the low yield strength and high plasticity sleeve deforms under stress to fill the gap, so that the relative slippage between the concrete prefabricated part with unstable precision and the bolt is reduced; simple and reasonable structure, convenient assembly and disassembly and suitability for popularization.

Drawings

FIG. 1 is a schematic view of the present invention in use;

FIG. 2 is a front view of the U-ring tensile connector of the present invention;

FIG. 3 is a schematic structural view of a U-ring tensile connector according to the present invention;

fig. 4 is a flow chart of the use of the present invention.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:

as shown in fig. 1-4, the labels 1-12 are respectively shown as: the device comprises a tower drum arc section segment 1, a tower drum straight section segment 2, a U-shaped bolt connecting device 3, a backing plate 4, a non-threaded sleeve 5, a low-yield-strength high-plasticity sleeve 6, a high-strength bolt 7, a U-shaped sleeve 8, a butt joint surface 9, a butt joint surface 10, solid U-shaped steel 11 and a sleeve 12.

Example (b): as shown in fig. 1, in the embodiment, the wind power hybrid tower prefabricated tower barrel connected by the bolt U ring is divided into a tower barrel arc-shaped segment sub-segment 1 and a tower barrel straight segment sub-segment 2, and the prefabricated tower barrel is formed by assembling four tower barrel arc-shaped segment sub-segments 1 and four tower barrel straight segment sub-segments 2 to form a closed structure; the tower barrel is divided into the arc section and the straight section, so that the modularization degree of the prefabricated tower barrel can be effectively improved, and the design and the production are facilitated.

As shown in fig. 1, the butt joint surfaces 9 and 10 of the tower arc segment sub-piece 1 and the tower straight segment sub-piece 2 are respectively provided with a butt joint surface 9 and a butt joint surface 10 which are matched with each other at the butt joint position of the two, wherein the butt joint surface 9 of the tower arc segment sub-piece 1 is recessed from one side of the tower straight segment sub-piece 2, and the butt joint surface 10 of the tower straight segment sub-piece 2 is recessed from one side of the tower arc segment sub-piece 1, so that the butt joint surfaces 9 and the butt joint surfaces 10 form a matched concave-convex fit and the inner and outer side surfaces of the tower arc segment sub-piece 1 and the tower straight segment sub-piece 2 are flush with each other.

The U-shaped bolt connecting device 3 is arranged at the butt joint position of each tower barrel arc section fragment 1 and each tower barrel straight section fragment 2, and the butt joint surface 9 and the butt joint surface 10 are fixedly connected through the U-shaped bolt connecting device 3, so that each tower barrel arc section fragment 1 and each tower barrel straight section fragment 2 are spliced to form an integral structure.

Specifically, as shown in fig. 2 and 3, the U-bolt connecting device 3 includes: the device comprises a base plate 4, a non-threaded sleeve 5, a low-yield-strength high-plasticity sleeve 6, a high-strength bolt 7 and a U-shaped sleeve 8. Wherein, an unthreaded sleeve 5 is pre-embedded in the arc-shaped segment sub-piece 1 of the tower barrel; the straight subsection 2 of tower section of thick bamboo is pre-buried U shaped steel pipe sleeve 8. The backing plate 4 is provided with a round hole which can pass through the low yield strength high plasticity sleeve 6, and the nut of the high strength bolt 7 can not pass through the round hole. The external diameter of the unthreaded sleeve 5 is larger than the reserved hole of the backing plate, the internal diameter of the unthreaded sleeve is larger than the external diameter of the low-yield-strength high-plasticity sleeve 6, and the length of the unthreaded sleeve is equal to the thickness of the tower barrel arc-shaped section segment 1. The outer diameter of the steel sleeve of the low-yield-strength high-plasticity sleeve 6 is smaller than the inner diameter of the unthreaded sleeve 5, the inner diameter of the low-yield-strength high-plasticity sleeve is larger than the outer diameter of the U-shaped sleeve 8, the length of the low-yield-strength high-plasticity sleeve is longer than that of the unthreaded sleeve 5, and the strength of high-plasticity steel is 176 MPa. The high-strength bolt 7 is a high-strength bolt of 10.9 grade or above. The U-shaped sleeve 8 is a sleeve 12 with an internal thread on a straight section, a solid U-shaped steel 11 on a bent section, and the sleeves 12 are respectively arranged at two ends of the solid U-shaped steel 11.

In the present embodiment, a part of the U-shaped sleeve 8 is embedded in the flat tower segment 2, and the embedded part includes the whole solid U-shaped steel 11 and a part of the sleeve 12, i.e. a part of the sleeve 12 is exposed and extends out of the inner side surface of the abutting surface 10, and the exposed part of the sleeve can pass through the non-threaded sleeve 5.

Referring to fig. 1 and 2, when the U-bolt connecting device 3 in this embodiment is used to assemble arc segment segments 1 and straight segment segments 2 of a tower, the method includes the following steps:

1) pre-buried component: embedding the unthreaded sleeve 5 in the arc section segment 1 of the tower cylinder, embedding the U-shaped sleeve 8 in the straight section segment 2 of the tower cylinder, welding the unthreaded sleeve with the longitudinal steel bars of the corresponding section, and pouring a component. In the pre-embedded mode, the sleeves 12 on both sides of the U-shaped sleeve 8 are exposed out of the inner side surface of the abutting surface 10.

2) Hoisting and aligning: hoisting the tower drum arc section segment 1 to the design position of the prefabricated tower drum, hoisting the tower drum straight section segment 2 to one side of the tower drum arc section segment 1, and aligning the butt joint surface 10 with the butt joint surface 9. And then, respectively aligning the sleeves 12 of the exposed parts of the U-shaped sleeves 8, penetrating the sleeves into the two unthreaded sleeves 5 embedded in the arc-shaped section sub-pieces 1 of the tower barrel one by one, and aligning the plate pieces of the arc-shaped section sub-pieces 1 of the tower barrel and the plate pieces of the straight section sub-pieces 2 of the tower barrel.

3) And (3) tightening the bolt: inserting the low-yield-strength high-plasticity sleeve 6 into the unthreaded sleeve 5, covering the backing plate 4, screwing the high-strength bolt 7 to enable the low-yield-strength high-plasticity sleeve 6 to be gradually pressed into the unthreaded sleeve 5, and applying pretightening force to the high-strength bolt 7 after the low-yield-strength high-plasticity sleeve 6 is completely pressed into the unthreaded sleeve 5 to complete the splicing connection.

Through the U type bolted connection device 3 that uses the tensile type connect prefabricated tower section of thick bamboo burst, increased the rigidity of connecting the face, improve sleeve resistance to plucking ability, also regard as shear force spare from the angle of vertical atress U type bolt, promote the ability of shearing between the board section. Meanwhile, the deformation characteristic of the low-yield-strength high-plasticity sleeve 6 is utilized to fill the gap between the threaded sleeve 5 and the high-strength bolt 7, so that the bolt connection rigidity is improved, the problem of stress concentration is weakened, the hole aligning difficulty is reduced, and the relative slippage between the concrete prefabricated part with unstable precision and the bolt is reduced.

In this embodiment, the axis of each of the unthreaded sleeves 5 in step 1) is perpendicular to the axis of each of the prefabricated tower segments, and the two unthreaded sleeves 5 are arranged in parallel. And 3) applying the pretightening force in the step 3), controlling each high-strength bolt 7 to apply the pretightening force to be consistent by using a torque wrench or a force limiting wrench, and checking and detecting the pretightening force loss through the tightening torque after 24 hours to ensure that the pretightening force reaches the standard.

In the embodiment, in specific implementation: the unthreaded sleeve 5 and the U-shaped sleeve 8 may be made of a nodular cast iron sleeve, or may be made of a sleeve made of other materials, such as a stainless steel sleeve.

During actual construction, the values of the outer diameters of the middle part and the upper and lower ends of the U-shaped sleeve 8 can be correspondingly adjusted according to specific requirements.

The backing plate 4 is a rigid backing plate; the unthreaded sleeve 5 is a rigid sleeve.

Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.