CN210507511U - Chamfering anchor bolt assembly for wind power - Google Patents

Abstract

A chamfer anchor assembly for wind power, comprising: an anchor bolt body having a first end and a second end; the first end and the second end are respectively used for penetrating through the upper anchor plate and the lower anchor plate, and a chamfer in the shape of a circular truncated cone is formed on the first end; the anchor bolt body with the one end that the bottom surface of chamfer combined is provided with the neck, the cross-sectional radius of neck is less than the cross-sectional radius of anchor bolt body, the neck encircles and is equipped with the screw thread. Set up the chamfer through the first end at the crab-bolt body, further set up the neck that the radius is less than the crab-bolt body again for the screw thread of neck is difficult because of the stress damage of nut, also is difficult for taking place to interfere and collide when the installation.

Description

Chamfering anchor bolt assembly for wind power

Technical Field

The utility model relates to a chamfer crab-bolt subassembly for wind-powered electricity generation.

Background

At present, the application of a squirrel-cage wind power foundation anchor bolt as a wind power tower base is a common technical means. The squirrel cage structure is typically: the upper anchor plate and the lower anchor plate are connected by an anchor bolt. The general installation procedure is: the lower anchor plate is fixed on the embedded part, one end of each anchor bolt is fixed on the lower anchor plate (the number of the anchor bolts of the common squirrel cage structure is 70-100), and then the upper anchor plate penetrates through all the anchor bolts and is parked on the leveling nuts.

For example, document 1 (publication No. CN202023199U) discloses a basic prestressed anchor plate and anchor bolt assembly, which includes an upper anchor plate and a lower anchor plate, wherein the upper anchor plate and the lower anchor plate are connected by a long anchor bolt, leveling nuts are respectively installed on the long anchor bolts at the upper and lower planes of the upper anchor plate, leveling bolts are uniformly distributed on the lower anchor plate, welding rivets are uniformly distributed on the bottom plane of the upper anchor plate near the inner ring and the outer ring, thin nuts and nuts are respectively installed on the long anchor bolts at the upper and lower planes of the lower anchor plate, and a heat shrinkage sleeve and an anchor bolt sleeve are sleeved on the long anchor bolts.

When a conventional prestressed pipe pile foundation is used for hoisting a fan tower cylinder, the flatness and the overall verticality of the foundation are required to be guaranteed to meet high requirements, slight inclination occurs, the construction of a rear upper tower cylinder is caused, the strength of the whole fan tower body is reduced, and the tower body is likely to break if the inclination is too large.

In view of this, document 2 (publication No. CN107190767A) discloses a high-strength anchor bolt assembly fixing system, which includes a top flange and a bottom flange that are disposed vertically symmetrically, and an anchor bolt that connects the top flange and the bottom flange, a sheath is sleeved outside the anchor bolt, embedded blocks that are uniformly distributed are disposed below the bottom flange, the bottom flange and the embedded blocks are connected by bolts, first leveling nuts that adjust the horizontal position of the bottom flange are disposed on the bolts, and oblique insertion ribs that connect the embedded blocks are disposed inside the top flange.

However, in the process of installing and debugging the anchor bolt in a construction site, when the anchor bolt penetrates through the screw hole of the connecting piece (the upper anchor plate and the lower anchor plate), the design requirement is difficult to achieve, namely the coaxiality of the upper anchor plate and the lower anchor plate as well as the upper anchor plate and the lower anchor plate is difficult to achieve the degree smaller than 1.5. Under the condition, the stress of the whole structure of the squirrel-cage wind power foundation anchor bolt is uneven, and the hidden danger of failure risk caused by fatigue is easily generated earlier in the service period of the anchor bolt. On the other hand, when the embedded parts such as the oblique dowel bars are arranged, the requirement on the coaxiality is high, and the proper function is difficult to be exerted under the condition that the coaxiality is less than 1.5.

On the other hand, adopt the nut with the crab-bolt after fixing completely, the effort that produces when the nut fastening can make the crab-bolt produce certain deformation, not only makes the axiality of crab-bolt can't reach a higher degree, and the stress on the nut still can lead to the screw thread impaired. In addition, when the upper anchor plate penetrates through the anchor bolt, interference often occurs, so that smooth installation is not achieved, sometimes, even threads on the anchor bolt are damaged, and finally, the nut cannot be screwed normally.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a chamfer crab-bolt subassembly for wind-powered electricity generation that the screw thread is not fragile and install more convenient in order to overcome current crab-bolt when the installation and by the nut fastening defect that its screw thread damaged easily.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

the utility model provides a chamfer crab-bolt subassembly for wind-powered electricity generation which characterized in that, it includes: an anchor bolt body having a first end and a second end; the first end and the second end are respectively used for penetrating through the upper anchor plate and the lower anchor plate, and a chamfer in the shape of a circular truncated cone is formed on the first end; the anchor bolt body with the one end that the bottom surface of chamfer combined is provided with the neck, the cross-sectional radius of neck is less than the cross-sectional radius of anchor bolt body, the neck encircles and is equipped with the screw thread.

Preferably, the angle between the chamfer and the axial direction is 25-30 °.

Preferably, the periphery of the neck is sleeved with a first nut and a second nut, and the first nut and the second nut clamp the upper anchor plate on two sides of the upper anchor plate; the first nut is arranged on one side, far away from the lower anchor plate, of the upper anchor plate; the first nut is a conical nut, and the end face of the end with the smaller radius of the first nut faces the upper anchor plate.

Preferably, a washer is further interposed between the first nut and the upper anchor plate, and a surface of the washer, which is joined to the first nut, is formed as a concave portion that is in a shape fit with the first nut.

Preferably, the second nut is made of resin.

Preferably, a wind power tower cylinder flange is clamped between the gasket and the upper anchor plate.

The utility model discloses an actively advance the effect and lie in: set up the chamfer through the first end at the crab-bolt body, further set up the neck that the radius is less than the crab-bolt body again for the screw thread of neck is difficult because of the stress damage of nut, also is difficult for taking place to interfere and collide when the installation.

Drawings

Fig. 1 is a schematic structural view of a wind power chamfering anchor bolt assembly according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of an anchor bolt body according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a wind power chamfering anchor assembly according to the present embodiment. As shown in fig. 1, a chamfering anchor assembly 100 for wind power according to embodiment 1 includes an upper anchor plate 40 and a lower anchor plate 50 which are disposed in parallel to each other, and a plurality of anchor bodies 10.

The anchor bodies 10 vertically penetrate the upper anchor plate 40 and the lower anchor plate 50. The anchor bolt body 10 is sleeved with a first nut 20 and a second nut 30 on one end penetrating through the upper anchor plate 40, and the first nut 20 and the second nut 30 clamp the upper anchor plate 40 on two sides of the upper anchor plate 40. At the end of the anchor body 10 that passes through the lower anchor plate 50, a bolt assembly 60 (comprising two nuts) secures the section of the anchor body 10 to the lower anchor plate 50. The second nut 30 is made of resin.

The first nut 20 is disposed on a side of the upper anchor plate 40 remote from the lower anchor plate 50.

Fig. 2 is a schematic structural view of the anchor bolt body 10 according to the present embodiment. As shown in fig. 2, the anchor bolt body 10 has a first end and a second end, i.e., both ends of the anchor bolt body 10.

The first end and the second end are respectively used for penetrating the upper anchor plate 40 and the lower anchor plate 50, and a chamfer 11 in the shape of a circular truncated cone is formed on the first end. The chamfer of the anchor bolt body 10 facilitates the release of stress so that the anchor bolt body 10 is less prone to cracking.

The end of the anchor bolt body 10 combined with the bottom surface of the chamfer 11 is provided with a neck 12, the section radius of the neck 12 is smaller than that of the anchor bolt body 10, and the neck 12 is annularly provided with threads. The neck 12 is threaded around, preferably slightly less than or flush with the radius of the anchor body 10 from the radius of the neck 12 plus the thread thickness.

The angle between the chamfer 11 and the axial direction is 25 to 30 °. That is, the waist of the truncated cone-shaped chamfer 11 forms an angle of 25 ° to 30 ° with the axial direction. In the present embodiment, the angle is set to 25 °. The provision of the chamfer 11 makes it possible for the anchor bolt body to be better guided during installation.

As shown in fig. 1-2, specifically, a first nut 20 and a second nut 30 are sleeved on the periphery of the neck 12, and the first nut 20 and the second nut 30 clamp the upper anchor plate 40 on two sides of the upper anchor plate 40; the first nut 20 is arranged on one side of the upper anchor plate 40 far away from the lower anchor plate 50; the first nut 20 is a tapered nut, and the end of the first nut 20 with the smaller radius faces the upper anchor plate 40.

A washer 24 is further interposed between the first nut 20 and the upper anchor plate 40, and a surface of the washer 24 to which the first nut 20 is joined is formed as a concave portion that is form-fitted to the first nut 20.

The effect of adding washer 24 is that the addition of washer 24 produces a change in the force of first nut 20 when tightened. In other words, by adjusting the radius, thickness and material of the washer 24, the acting force applied to the anchor bolt body 10 by the first nut 20 can be varied to meet different requirements and environments.

A wind power tower cylinder flange 80 is clamped between the gasket and the upper anchor plate 40, and the anchor bolt body 10 penetrates through the wind power tower cylinder flange 80.

The levelness of the upper anchor plate 40 is adjusted by adjusting the second nut 30 on each anchor body 10 when installing the anchor assembly, so the second nut 30 is a leveling nut commonly used in the art. Due to the influence of the machining precision and the machining material, after the upper anchor plate 40 is leveled, the anchor bolt body 10 is not perfectly perpendicular to the upper anchor plate 40 and the lower anchor plate 50. Therefore, after the anchor bolt body 10 is completely fixed by the nut in the prior art, the acting force generated when the nut is fastened can cause the anchor bolt body 10 to generate certain deformation, so that the thread is damaged to a certain extent.

In the present invention, the first nut 20 is a tapered nut having a smaller radius and facing the upper anchor plate 40. When the first nut 20 fastens the anchor bolt body 10 with the upper anchor plate 40 adjusted to be horizontal, if there is a slight deflection of the anchor bolt body 10, the first nut 20 can also follow a certain deflection. In other words, a part of the force generated by the first nut 20 during fastening is at least partially absorbed by the first nut 20, so that the anchor bolt body 10 is not greatly deformed, and the coaxiality of the anchor bolt body 10 is significantly improved.

Further, since the neck 12 has a smaller radius than the anchor bolt body 10, the deformation caused by the tightening of the first nut 20 is more concentrated at the portion where the neck is engaged with the anchor bolt body 10 (or it can be understood that the neck 12 is engaged with other portions of the anchor bolt body 10) so that the screw thread located at the neck 12 is less affected by the deformation.

On the other hand, if the deviation of the anchor bolt body 10 is too large, since the first nut 20 is a tapered nut, the deviation can be observed with the naked eye very clearly, and even if it is adjusted accordingly at the time of installation, for example, the anchor bolt body can be replaced.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims (6)

1. The utility model provides a chamfer crab-bolt subassembly for wind-powered electricity generation which characterized in that, it includes:

an anchor bolt body having a first end and a second end;

the first end and the second end are respectively used for penetrating through the upper anchor plate and the lower anchor plate, and a chamfer in the shape of a circular truncated cone is formed on the first end;

the anchor bolt body with the one end that the bottom surface of chamfer combined is provided with the neck, the cross-sectional radius of neck is less than the cross-sectional radius of anchor bolt body, the neck encircles and is equipped with the screw thread.

2. The wind power filleted anchor assembly of claim 1,

the included angle between the chamfer and the axial direction is 25-30 degrees.

3. The wind power filleted anchor assembly of claim 2,

a first nut and a second nut are sleeved on the periphery of the neck,

the first nut and the second nut clamp the upper anchor plate on two sides of the upper anchor plate;

the first nut is arranged on one side, far away from the lower anchor plate, of the upper anchor plate;

the first nut is a conical nut, and the end face of the end with the smaller radius of the first nut faces the upper anchor plate.

4. The wind power filleted anchor assembly of claim 3,

and a washer is further interposed between the first nut and the upper anchor plate, and a surface of the washer, which is joined to the first nut, is formed as a concave portion that is in a shape fit with the first nut.

5. The wind power filleted anchor assembly of claim 4,

the second nut is made of resin.

6. The wind power filleted anchor assembly of claim 5,

the gasket with go up anchor plate between press from both sides and be equipped with wind power tower cylinder flange.

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