CN207905996U - A kind of wind energy conversion system tower bracing means - Google Patents

Abstract

A kind of wind energy conversion system tower bracing means, including bracing means base section and standard knot.The mode that base section is connected by screw bolts and tower base foundation are affixed, and standard knot is installed on base section successively, and base section is mutually fixed by retractable supports with tower with standard knot.The utility model tower bracing means is safe and reliable, the integrally-built wind resistance of built wind energy conversion system and anti-seismic performance can be effectively improved, compared with individual wind energy conversion system tower, according to Critical Force of Compressed Bar formula, also the computed altitude of tower can be effectively reduced, increase the rigidity of tower, and then the Critical Force of Compressed Bar of tower is substantially improved, improves the service life of tower.This bracing means breaks the whole up into parts, and difficulty of construction can be reduced as unit of section, and be readily transported, and is suitble to promote the use of.

Description

Wind turbine tower strengthening device

technical field

The utility model belongs to the field of construction technology and the field of maintenance and reinforcement of wind power systems, and in particular relates to a reinforcement device for wind turbine tower tubes.

Background technique

As a pioneer in the new energy industry, wind turbines are gradually developing towards high power, and at the same time, the tower structure presents the characteristics of ultra-high and thin. As a typical wind-sensitive structure, the wind turbine tower must not only ensure the technological requirements of wind turbine power generation, but also must have sufficient strength and stability. Therefore, reducing the impact of wind-induced vibration and fatigue stress on the tower and improving the service life of the wind turbine are the direction of many engineers' efforts.

Modern wind turbines have been developed for nearly 30 years since the end of the 20th century. Many wind turbine towers have been affected by wind loads and fatigue stresses for a long time, and their stability and safety have been greatly reduced. In extreme cases, tower damage may even occur. The cylinder lost its stability and collapsed. Therefore, it is necessary to take appropriate reinforcement measures to maintain the wind turbine towers that have been in disrepair for a long time and are in rare extreme wind weather.

Utility model content

Aiming at the deficiencies in the prior art, the utility model provides a self-elevating wind turbine tower reinforcement device which is novel in structure, convenient in construction and can significantly improve the wind resistance performance of the structure.

In order to achieve the above object, the utility model adopts the following technical solutions:

A wind turbine tower reinforcement device, characterized in that it comprises: a reinforcement device base section and a plurality of reinforcement device standard sections, the reinforcement device base section and the reinforcement device standard sections are installed around the wind turbine tower, and the reinforcement The base section of the device is fixedly connected to the foundation at the bottom of the tower, and multiple standard sections of the reinforcement device are installed on the foundation section of the reinforcement device in sequence;

Both the foundation section of the reinforcement device and the standard section of the reinforcement device are the same truss structure, and the truss structure includes the first horizontal support, the second horizontal support, the third horizontal support, the fourth horizontal support, the first vertical support, and the second vertical support , the third vertical support and the fourth vertical support, the first horizontal support, the second horizontal support, the third horizontal support and the fourth horizontal support surround in turn to form a rectangular frame, and the four vertical supports are supported under the four corners of the rectangular frame, The first horizontal support and the fourth horizontal support are connected by the first vertical support, the first horizontal support and the second horizontal support are connected by the second vertical support, and the second horizontal support and the third horizontal support are connected by the third horizontal support. The vertical supports are fixedly connected, and the third horizontal support and the fourth horizontal support are fixedly connected through the fourth vertical support, wherein the middle part of the third horizontal support is provided with an installation opening, and the two ends of the first horizontal support are respectively connected to the first vertical support. It is fixedly connected with the second vertical support, the fourth horizontal support is hinged with the first vertical support, and the second horizontal support is hinged with the second vertical support.

In order to optimize the above technical solutions, the specific measures taken also include:

The middle parts of the first vertical support, the second vertical support, the third vertical support and the fourth vertical support are equipped with horizontal hydraulic telescopic rods in the direction of the tower, and the ends of the hydraulic telescopic rods are provided with arc claws , the radian of the arc-shaped claw coincides with the arc of the circumference of the tower.

Diagonal reinforcing supports are connected between the first vertical support and the fourth vertical support, and between the second vertical support and the third vertical support.

Both the basic section of the reinforcement device and the standard section of the reinforcement device are made of section steel.

Between the foundation section of the reinforcement device and the bottom foundation of the tower, between the standard section of the reinforcement device and the foundation section of the reinforcement device, and between the standard sections of the reinforcement device are all fixedly connected by bolts.

The total height of the reinforcement device is 40m, and it is divided into 1 basic section of the reinforcement device and 7 standard sections of the reinforcement device.

The beneficial effect of the utility model is that it is safe and reliable, and can ensure the wind and earthquake resistance performance of the overall structure of the wind turbine. Compared with a single wind turbine tower, according to the formula of the critical force of the pressure bar, the calculated height of the tower can also be effectively reduced. , thereby greatly increasing the critical force of the compression bar of the tower and improving the service life of the tower. The reinforcement device is divided into parts, and the construction difficulty can be reduced by taking the section as the unit, and it is convenient for transportation, and is suitable for popularization and use.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a top view of the truss structure of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, describe the utility model in detail.

The wind turbine tower reinforcement device shown in Figure 1 and Figure 2 is installed on a 3MW horizontal axis large wind turbine. The total height of the reinforcement device is 40m, and it is divided into 8 sections, 1 section of the base section of the reinforcement device and 7 sections of the standard section of the reinforcement device , the height of each section is 5m. The base section 1 of the reinforcement device and the standard section 2 of the reinforcement device are installed around the tower 3 of the wind turbine. The foundation section 1 of the reinforcement device is connected to the bottom foundation of the tower 3 by bolts, and multiple standard sections 2 of the reinforcement device are installed one after the other. On the foundation section 1 of the reinforcement device, the standard section 2 of the reinforcement device and the foundation section 1 of the reinforcement device, and the standard sections 2 of the reinforcement device are also fixedly connected by bolts.

Both the foundation section 1 of the reinforcement device and the standard section 2 of the reinforcement device are truss structures 4 made of section steel, specifically including the first horizontal support 4-1, the second horizontal support 4-2, the third horizontal support 4-3, and the fourth horizontal support Support 4-4, first vertical support 4-5, second vertical support 4-6, third vertical support 4-7 and fourth vertical support 4-8, first horizontal support 4-1, second horizontal support 4 -2. The third horizontal support 4-3 and the fourth horizontal support 4-4 surround and form a rectangular frame in turn, while the four vertical supports are supported under the four corners of the rectangular frame, the first horizontal support 4-1 and the fourth horizontal support 4 -4 are connected through the first vertical support 4-5, the first horizontal support 4-1 and the second horizontal support 4-2 are connected through the second vertical support 4-6, the second horizontal support 4-2 and the second horizontal support 4-2 The three horizontal supports 4-3 are fixedly connected through the third vertical support 4-7, and the third horizontal support 4-3 and the fourth horizontal support 4-4 are fixedly connected through the fourth vertical support 4-8.

Wherein, the middle part of the third horizontal support 4-3 is provided with an installation opening 5, and the two ends of the first horizontal support 4-1 are respectively fixedly connected with the first vertical support 4-5 and the second vertical support 4-6, and the fourth horizontal support The support 4-4 is hinged to the first vertical support 4-5 and the second horizontal support 4-2 is hinged to the second vertical support 4-6. Such a design enables the truss structure 4 to expand laterally through the installation opening 5 so as to be installed around the existing wind turbine tower.

In addition, between the first vertical support 4-5 and the fourth vertical support 4-8, between the second vertical support 4-6 and the third vertical support 4-7, there are oblique reinforcement supports 8, which can ensure sufficient stability. The middle part of the first vertical support 4-5, the second vertical support 4-6, the third vertical support 4-7 and the fourth vertical support 4-8 is equipped with a horizontal hydraulic telescopic rod 6 towards the direction of the tower tube 3. The end of the rod 6 is provided with an arc-shaped supporting claw 7 , and the arc of the arc-shaped supporting claw 7 coincides with the arc of the circumference of the tower tube 3 .

During installation, the foundation section 1 of the reinforcement device is deployed by means of vertical hinged supports and preset installation openings 5, installed around the wind turbine tower 3, and fixed to the bottom foundation of the tower 3 by means of bolt connection. Use a crane to hoist the standard section 2 of the reinforcement device upward by section, open the installation port 5 on one side, and rotate the vertical hinged support on the other side to expand the standard section horizontally, install the standard section around the tower tube 3, and weld it Fix the installation port 5 to realize closing. Every time a section of the reinforcing device is installed, the internal hydraulic telescopic rod 6 can be adjusted so that the device is fixedly connected with the tower tube 3 to further improve stability.

In this example, the reinforcement device can effectively improve the critical force of the compression bar of the tower, because the two ends of the tower can be approximately regarded as one end fixed and the other free, and the critical force of the compression bar is calculated according to Calculation (where EI represents the lateral stiffness of the tower, and L represents the calculated length of the tower), the reinforcement device increases the stiffness of the bottom tower by 0.1 times, and the critical force of the compression bar will increase by 8 times.

It should be noted that terms such as "upper", "lower", "left", "right", "front", and "rear" cited in the utility model are only for the convenience of description and are not used In order to limit the applicable scope of the present utility model, the change or adjustment of the relative relationship shall also be regarded as the applicable scope of the present utility model without substantive changes in the technical content.

The above are only preferred implementations of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the utility model all belong to the scope of protection of the utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims (6)

1. a kind of wind energy conversion system tower bracing means, which is characterized in that including：One bracing means base section（1）With multiple reinforcings Device standard knot（2）, the bracing means base section（1）With bracing means standard knot（2）It surrounds and is installed on wind energy conversion system tower （3）Surrounding, bracing means base section（1）With tower（3）Base foundation is fixedly connected, multiple bracing means standard knots（2）Successively It is tired to be mounted on bracing means base section foldedly（1）On；

Bracing means base section（1）With bracing means standard knot（2）It is identical truss structure（4）, the truss structure（4） It is supported including first level（4-1）, it is second horizontally-supported（4-2）, third it is horizontally-supported（4-3）, it is the 4th horizontally-supported（4-4）、 First vertical support（4-5）, the second vertical support（4-6）, third vertical support（4-7）With the 4th vertical support（4-8）, described First level supports（4-1）, it is second horizontally-supported（4-2）, third it is horizontally-supported（4-3）It is horizontally-supported with the 4th（4-4）Successively Around rectangular frame is formed, four vertical supports are supported below the quadrangle of rectangular frame, first level support（4-1）With the 4th It is horizontally-supported（4-4）Between pass through the first vertical support（4-5）It is connected, first level support（4-1）It is horizontally-supported with second（4- 2）Between pass through the second vertical support（4-6）It is connected, second is horizontally-supported（4-2）It is horizontally-supported with third（4-3）Between pass through Third vertical support（4-7）It is fixedly linked, third is horizontally-supported（4-3）It is horizontally-supported with the 4th（4-4）Between by the 4th hang down Allotment supports（4-8）It is fixedly linked, wherein third is horizontally-supported（4-3）Middle part be equipped with installing port（5）, first level support（4- 1）Both ends respectively with the first vertical support（4-5）With the second vertical support（4-6）It is fixedly connected, the 4th is horizontally-supported（4-4） With the first vertical support（4-5）Hinged, second is horizontally-supported（4-2）With the second vertical support（4-6）It is hinged.

2. a kind of wind energy conversion system tower bracing means as described in claim 1, it is characterised in that：First vertical support（4- 5）, the second vertical support（4-6）, third vertical support（4-7）With the 4th vertical support（4-8）Middle part towards tower（3）Direction It is mounted on horizontal hydraulic telescopic rod（6）, the hydraulic telescopic rod（6）End be equipped with arc claw（7）, the arc support Pawl（7）Radian and tower（3）Circumference arc match.

3. a kind of wind energy conversion system tower bracing means as described in claim 1, it is characterised in that：First vertical support（4- 5）With the 4th vertical support（4-8）Between, the second vertical support（4-6）With third vertical support（4-7）Between be respectively connected with tiltedly It is supported to reinforcing（8）.

4. a kind of wind energy conversion system tower bracing means as described in claim 1, it is characterised in that：The bracing means base section （1）With bracing means standard knot（2）Shaped steel is all made of to be made.

5. a kind of wind energy conversion system tower bracing means as described in claim 1, it is characterised in that：The bracing means base section （1）With tower（3）Between base foundation, bracing means standard knot（2）With bracing means base section（1）Between, bracing means mark Quasi- section（2）Between be bolted to connection.

6. a kind of wind energy conversion system tower bracing means as described in claim 1, it is characterised in that：The total high 40m of the bracing means, It is divided into 1 section bracing means base section（1）With 7 section bracing means standard knots（2）.