CN220910144U - Flange connection assembly, tower barrel and wind generating set - Google Patents

Abstract

The embodiment of the disclosure provides a flange joint subassembly, a tower section of thick bamboo and wind generating set, and flange joint subassembly includes: the first flange comprises a first connecting cylinder and a first outer flange connected to the periphery of the first connecting cylinder, and a plurality of first bolt holes are formed in the first outer flange at intervals along the circumferential direction of the first flange; the second flange comprises a second connecting cylinder and a second outer flange connected to the periphery of the second connecting cylinder, and a plurality of second bolt holes are formed in the second outer flange at intervals along the circumferential direction of the second flange; the first connecting bolts and the first connecting nuts are vertically opposite, and each first connecting bolt penetrates through the first bolt hole and the second bolt hole and then is combined with the first connecting nut; the screwing driving piece is provided with a radial through hole on the side wall of the second connecting barrel, and can be inserted into the radial through hole from the inner side of the second connecting barrel to drive the first connecting nut to be screwed relative to the first connecting bolt.

Description

Flange connection assembly, tower barrel and wind generating set

Technical Field

The disclosure relates to the technical field of wind power generation, in particular to a flange connection assembly, a tower barrel and a wind generating set.

Background

The connection of each section tower section of an existing wind generating set tower is connected through a flange plate, bolt holes are formed in the flange plate and are fixedly connected through bolts, in order to improve the bearing capacity of the tower, the number of the bolts is required to be increased, and a T-shaped flange capable of being provided with inner and outer rings of bolts is generally adopted for connection. In the long-term use process, the bolts of the T-shaped flange need to be checked and maintained regularly, and as the outer ring bolts of the T-shaped flange are positioned at the outer side of the tower, in order to maintain the outer ring bolts regularly, the outer maintenance platforms need to be additionally arranged outside the tower, and different outer maintenance platforms need to be designed according to different diameters of the tower, so that the design cost and the material cost are increased, and the weight of the tower is increased; in addition, the external operation and maintenance operation can be influenced by weather conditions, and the high-altitude operation has dangers and equipment falling risks.

Disclosure of utility model

The invention aims to at least solve the problems that the flange connection bolts on the outer side of the tower barrel in the prior art or related art are required to be additionally provided with an outer maintenance platform for periodic maintenance, and the operation danger is high at an outer high place.

In view of the foregoing, a first aspect of the present disclosure provides a flange connection assembly, comprising: the first flange comprises a first connecting cylinder and a first outer flange connected to the periphery of the first connecting cylinder, and a plurality of first bolt holes are formed in the first outer flange at intervals along the circumferential direction of the first flange; the second flange comprises a second connecting cylinder and a second outer flange connected to the periphery of the second connecting cylinder, and a plurality of second bolt holes are formed in the second outer flange at intervals along the circumferential direction of the second flange; the plurality of first connecting assemblies comprise first connecting bolts and first connecting nuts, the first bolt holes and the second bolt holes are vertically opposite, and each first connecting bolt is combined with the first connecting nut after passing through the first bolt hole and the second bolt hole respectively; the screwing driving piece is provided with a radial through hole on the side wall of the second connecting barrel, and can be inserted into the radial through hole from the inner side of the second connecting barrel to drive the first connecting nut to be screwed relative to the first connecting bolt.

In some embodiments, the screw drive is formed as a worm, and the outer circumference of the first coupling nut forms a worm gear structure that mates with the worm.

In some embodiments, the first outer flange has a first upper surface and a first lower surface facing each other, the second outer flange has a second upper surface and a second lower surface facing each other, the first lower surface and the second upper surface facing each other, and the first coupling bolt penetrates the first bolt hole and the second bolt hole from the first upper surface downward in sequence and then is coupled with the first coupling nut, and the radial through hole extends to one side of the second bolt hole in the circumferential direction of the second flange.

In some embodiments, a countersink is formed on the second lower surface in communication with the second bolt hole, and the first coupling nut is disposed in the countersink, with the radial through hole in communication with the countersink.

In some embodiments, the flange connection assembly further includes a nut cover plate coupled to the second lower surface to retain the first connection nut in the sink.

In some embodiments, an upper countersink is provided on the first upper surface in communication with the first bolt hole, and a bolt head of the first connecting bolt is disposed in the upper countersink.

In some embodiments, the bolt head is non-circular in cross-section and the countersink is adapted to the bolt head to limit rotation of the bolt head in the circumferential direction in the countersink.

In some embodiments, the flange connection assembly further includes a bolt cover plate coupled to the first upper surface to retain the first connection bolt in the first bolt hole.

In some embodiments, a transmission thread is provided on a side wall of the first end of the screw driver, and mating teeth are formed on an outer side wall of the first coupling nut, the transmission thread and the mating teeth being capable of intermeshing to drive the first coupling nut to rotate about the first coupling bolt.

In some embodiments, the second end of the screw drive is formed as a prismatic structure.

In some embodiments, the first flange is a T-flange, further comprising a first inner flange attached to an inner peripheral side of the first connecting barrel; the second flange is a T-shaped flange and further comprises a second inner flange connected to the inner peripheral side of the second connecting cylinder.

An embodiment of a second aspect of the present disclosure provides a tower comprising a first tower section and a second tower section connected to each other, the tower further comprising a flange connection assembly according to any of the above embodiments, wherein the first connecting section is fixedly connected to the first tower section and the second connecting section is fixedly connected to the second tower section.

The tower provided in this embodiment has the above flange connection assembly of any one of the embodiments, so that the tower has the above advantages of any one of the embodiments, and will not be described in detail herein.

A third aspect embodiment of the present disclosure provides a wind power plant comprising a tower according to any of the above embodiments.

The wind generating set provided by the embodiment of the present invention has the advantages of any one of the embodiments due to the tower barrel of any one of the embodiments, and is not described herein.

According to the flange connection assembly, the first connection nut is driven to be screwed through the screwing driving piece located on the inner side of the second connection barrel, so that the first connection nut is screwed relative to the first connection bolt, fastening connection between the first connection nut located on the outer flange and the first connection bolt is achieved, the first flange and the second flange are connected through the first connection nut and the first connection bolt, fastening and maintenance of the first connection bolt and the first connection nut on the outer flange can be achieved inside the flange connection assembly, maintenance operation is not needed to be conducted to the outside of the flange connection assembly, the risk of high-place operation is avoided, an outer maintenance platform structure which is needed to be additionally installed for maintaining the first connection assembly on the outer flange outside the tower barrel is omitted, cost is saved, and weight of products is reduced.

Additional aspects and/or advantages of the present general inventive concept 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 general inventive concept.

Drawings

The above and other objects and features of the present application will become more apparent from the following description of embodiments of the present application taken in conjunction with the accompanying drawings in which:

FIG. 1 illustrates a schematic structural view of a flange connection assembly according to an embodiment of the present application;

FIG. 2 illustrates another structural schematic of a flange connection assembly of an embodiment of the present application;

FIG. 3 shows a schematic cross-sectional view of a flange connection assembly according to an embodiment of the present application in a longitudinal direction;

FIG. 4 shows a schematic top view of a first flange of an embodiment of the present application;

FIG. 5 shows a schematic cross-sectional view of a first flange of an embodiment of the present application in a longitudinal direction;

FIG. 6 shows a schematic structural view of a second flange according to an embodiment of the present application;

FIG. 7 shows a schematic cross-sectional view of a second flange of an embodiment of the application in a longitudinal direction;

FIG. 8 shows a schematic cross-sectional view of a second flange of an embodiment of the present application in a lateral direction;

FIG. 9 shows a schematic cross-sectional view in the transverse direction of a screw drive in accordance with an embodiment of the present application assembled with a second flange;

FIG. 10 shows a schematic structural view of a screw drive of an embodiment of the present application;

FIG. 11 shows a schematic structural view of a first connecting bolt according to an embodiment of the present application;

FIG. 12 shows a schematic cross-sectional view of a first coupling nut in a longitudinal direction of an embodiment of the application;

Fig. 13 illustrates an exploded view of a flange connection assembly according to an embodiment of the present application.

Fig. 1 to 13 reference numerals illustrate:

10 first flange, 110 first outer flange, 120 first bolt holes, 121 countersink, 130 first inner flange, 131 third bolt holes,

20 Second flange, 210 second outer flange, 220 second bolt holes, 221 countersink, 230 second inner flange, 231 fourth bolt holes,

30 First connecting bolts, 310 bolt heads, 320 bolt shafts,

40, The first coupling nut 410 mates with the teeth, 420 threaded holes,

50 Screw drive, 510 first end, 520 second end,

60 Radial through-holes,

710 Second coupling bolts, 720 second coupling nuts,

810 Bolt cover plate, 820 nut cover plate, 821 via hole.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be altered as will be apparent after an understanding of the disclosure, except for operations that must occur in a specific order. Furthermore, descriptions of features known in the art may be omitted for clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after an understanding of the present disclosure.

As used herein, the term "and/or" includes any one of the listed items associated as well as any combination of any two or more.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in the examples described herein may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.

In the description, when an element such as a layer, region or substrate is referred to as being "on" another element, "connected to" or "coupled to" the other element, it can be directly "on" the other element, be directly "connected to" or be "coupled to" the other element, or one or more other elements intervening elements may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" or "directly coupled to" another element, there may be no other element intervening elements present.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, amounts, operations, components, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, amounts, operations, components, elements, and/or combinations thereof. The term "plurality" represents two and any number of two or more.

The definition of the terms "upper", "lower", "top" and "bottom" in this disclosure are all based on the orientation of the product when in normal use, when placed upright.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. Unless explicitly so defined herein, terms such as those defined in a general dictionary should be construed to have meanings consistent with their meanings in the context of the relevant art and the present utility model and should not be interpreted idealized or overly formal.

In addition, in the description of the examples, when it is considered that detailed descriptions of well-known related structures or functions will cause ambiguous explanations of the present utility model, such detailed descriptions will be omitted.

The flange connection assembly, the tower and the wind generating set provided by the embodiment of the utility model are described below with reference to fig. 1 to 13.

As shown in fig. 1, 2, 3 and 13, an embodiment of a first aspect of the present disclosure provides a flange connection assembly comprising: the first flange 10 includes a first connection cylinder and a first outer flange 110 connected to an outer circumference of the first connection cylinder, and a plurality of first bolt holes 120 spaced apart along a circumferential direction of the first flange 10 are provided in the first outer flange 110; the second flange 20 including a second connection cylinder and a second outer flange 210 connected to the outer circumference of the second connection cylinder, the second outer flange 210 being provided with a plurality of second bolt holes 220 spaced apart along the circumferential direction of the second flange 20; a plurality of first coupling assemblies including first coupling bolts 30 and first coupling nuts 40, the first and second bolt holes 120 and 220 being vertically opposite, each first coupling bolt 30 being coupled with the first coupling nut 40 after passing through the first and second bolt holes 120 and 220, respectively; the screwing driving piece 50 is provided with a radial through hole 60 on the side wall of the second connecting cylinder, and the screwing driving piece 50 can be inserted into the radial through hole 60 from the inner side of the second connecting cylinder to drive the first connecting nut 40 to be screwed relative to the first connecting bolt 30.

According to the flange connection assembly provided by the embodiment of the invention, the first connection nut 40 is driven to be screwed through the screwing driving piece 50 positioned at the inner side of the second connection barrel, so that the first connection nut 40 is screwed relative to the first connection bolt 30, the fastening connection between the first connection nut 40 positioned on the outer flange and the first connection bolt 30 is realized, the first flange 10 and the second flange 20 are connected through the first connection nut 40 and the first connection bolt 30, the fastening and maintenance of the first connection bolt 30 and the first connection nut 40 on the outer flange can be realized inside the flange connection assembly by a person, the maintenance operation is not required to be performed outside the flange connection assembly, the risk of high-place operation is avoided, the external maintenance platform structure which is required to be additionally arranged for maintaining the first connection assembly on the outer flange outside the tower barrel is also omitted, the cost is saved, and the weight of a product is also reduced.

For a specific mating structure between the screw driver 50 and the first coupling nut 40, in some embodiments, as shown in fig. 9, 10 and 12, the screw driver 50 is formed as a worm, and the outer circumference of the first coupling nut 40 is formed as a worm wheel structure that mates with the worm. The cooperation of worm gear and worm is used extensively, and the structure is ripe, and worm gear and worm structure's transmission cooperation can accomplish worm wheel axial, worm axial mutually perpendicular and mutually noninterfere, is applicable to and revolves the first coupling nut 40 from radial direction to worm gear and worm structure's transmission cooperation still has the advantage that the noise is low, vibration is little.

In some embodiments, as shown in fig. 1, 2, 3 and 13, the first outer flange 110 has a first upper surface and a first lower surface facing each other, the second outer flange 210 has a second upper surface and a second lower surface facing each other, the first and second upper surfaces face each other, and the first coupling bolts 30 are coupled with the first coupling nuts 40 after penetrating the first and second bolt holes 120 and 220 from the first upper surface downward in sequence, and the radial through holes 60 extend to one side of the second bolt holes 220 in the circumferential direction of the second flange 20.

In some embodiments, as shown in fig. 7, a sinking groove 221 communicating with the second bolt hole 220 is formed on the second lower surface, the first coupling nut 40 is disposed in the sinking groove 221, and the radial through hole 60 communicates with the sinking groove 221. By arranging the sinking groove 221, an installation space is reserved for the arrangement of the first connecting nut 40, and the radial through hole 60 is communicated with the sinking groove 221, and the screwing driving piece 50 can directly extend into the sinking groove 221 from the radial through hole 60 to be contacted with the first connecting nut 40, so that the first connecting nut 40 is driven to rotate, and the first connecting nut 40 is matched with the screwing driving piece 50.

In some embodiments, the flange connection assembly further includes a nut cover plate 820, the nut cover plate 820 being coupled to the second lower surface to retain the first coupling nut 40 in the sink 221. The nut cover plate 820 can prevent the first coupling nut 40 from falling from the sink 221 during the lifting process, and can also have a waterproof and dustproof effect.

Further, as shown in fig. 1, 2, 3 and 13, the nut cover plate 820 is provided with a through hole 821, and the first connecting bolt 30 can pass through the through hole 821, so that interference with the nut cover plate 820 caused by overlong bolt rod 320 of the first connecting bolt 30 can be avoided, and the size limitation of the first connecting bolt 30 is smaller.

Specifically, as shown in fig. 1, 2, 3 and 13, the central axis of the first flange 10 coincides with the central axis of the second flange 20, and the first flange 10 and the second flange 20 are stacked up and down in the vertical direction.

Alternatively, as shown in fig. 1, 2, 3 and 13, the first flange 10 may be positioned above the second flange 20, the radial through hole 60 is provided on the second flange 20 positioned below, and the first coupling bolt 30 sequentially passes through the first bolt hole 120, the second bolt hole 220 from top to bottom and extends into the sink groove 221 communicating with the second bolt hole 220 to be coupled with the first coupling nut 40 positioned in the sink groove 221. Of course, the first flange 10 may be located below the second flange 20, and the first flange 10 and the second flange 20 are disposed upside down, in which case, the radial through hole 60 is disposed on the second flange 20 located above, and the first connecting bolt 30 sequentially passes through the first bolt hole 120 and the second bolt hole 220 from bottom to top, and extends into the sinking groove 221 communicating with the second bolt hole 220, and is connected with the first connecting nut 40 located in the sinking groove 221.

In some embodiments, as shown in fig. 4 and 5, an upper sink 121 communicating with the first bolt hole 120 is provided on the first upper surface, and the bolt head 310 of the first coupling bolt 30 is provided in the upper sink 121. By providing the countersink 121, an installation space is reserved for the provision of the bolt head 310 of the first connecting bolt 30.

With respect to the specific structure of the bolt head 310 of the first coupling bolt 30, in some embodiments, as shown in fig. 11, the cross section of the bolt head 310 is non-circular, and the upper countersink 121 is adapted to the bolt head 310 to restrict the bolt head 310 from rotating in the circumferential direction in the upper countersink 121. The cross section of the bolt head 310 is non-circular, the cross section of the upper sinking groove 121 is also non-circular matched with the bolt head 310, and under the condition that the bolt head 310 is positioned in the upper sinking groove 121, the bolt head 310 can be limited to rotate in the circumferential direction in the upper sinking groove 121, so that the first connecting bolt 30 does not rotate along with the first connecting nut 40 under the condition that the first connecting nut 40 is driven to rotate by the screwing driving piece 50, the first connecting nut 40 advances along the thread of the first connecting bolt 30, and further, the first connecting nut 40 and the first connecting bolt 30 can be assembled in place.

Alternatively, as an example, the cross section of the bolt head 310 may be any one of quadrangle, pentagon, hexagon, D-shape, ellipse, and has a regular shape, which is convenient to process, and can perform anti-rotation operation in the case of being mounted in the upper sink 121 adapted to the shape thereof, thereby realizing the relative fixation of the bolt head 310 and the upper sink 121 in the circumferential direction.

In some embodiments, as shown in fig. 1, 2, 3 and 13, the flange connection assembly further includes a bolt cover plate 810, the bolt cover plate 810 being attached to the first upper surface to retain the first connection bolt 30 in the first bolt hole 120. The bolt cover plate 810 can prevent the first connection bolt 30 from falling from the sinking groove 221 in the lifting process, and can also play a waterproof and dustproof role.

In some embodiments, as shown in fig. 10 and 12, a transmission thread is provided on a sidewall of the first end 510 of the screw driver 50, and a mating tooth 410 is formed on an outer sidewall of the first coupling nut 40, and the transmission thread and the mating tooth 410 can be engaged with each other to drive the first coupling nut 40 to rotate about the first coupling bolt 30. Wherein, the driving thread may be a diagonal thread, and the mating teeth 410 may be gear teeth or diagonal threads, etc.

Specifically, in some embodiments, as shown in fig. 12, a threaded hole 420 is further provided on the first connection nut 40, the first connection bolt 30 further includes a bolt shaft 320, an external thread is provided on an outer sidewall of the bolt shaft 320, and the threaded hole 420 is in threaded engagement with the bolt shaft 320, so as to achieve a fastened connection between the first connection nut 40 and the first connection bolt 30.

In some embodiments, as shown in fig. 10, the second end 520 of the screw drive 50 is formed as a prismatic structure. The prismatic structure is convenient to be quickly connected and detached with tools (such as a manual screwdriver, a wrench, an electric screwdriver and the like) for screwing, and is beneficial to accelerating the screwing speed. Alternatively, as an example, the second end 520 of the screw driving member 50 may be a quadrangular prism, a pentagonal prism, a hexagonal prism, etc., which is relatively common, and has a simple structure and is convenient for manufacturing.

In some embodiments, as shown in fig. 1, 2, 3, 4, 5, 6, 7 and 13, the first flange 10 is a T-shaped flange, and further includes a first inner flange 130 connected to an inner circumferential side of the first connecting cylinder; the second flange 20 is a T-shaped flange, and further includes a second inner flange 230 coupled to an inner circumferential side of the second coupling cylinder. So configured, the first and second inner flanges 130 and 230 provide more space for the connection assemblies of the first and second flanges 10 and 20, for example, a plurality of second connection assemblies may be provided on the first and second inner flanges 130 and 230, increasing the number of connection assemblies, which may improve the tower bearing capacity.

Further, in some embodiments, specifically, as shown in fig. 1, 2, 3, 4, 5, 6, 7 and 13, the first inner flange 130 is provided with a plurality of third bolt holes 131 spaced apart along the circumferential direction of the first flange 10; the second inner flange 230 is provided with a plurality of fourth bolt holes 231 spaced apart along the circumferential direction of the second flange 20; a plurality of second coupling assemblies including a second coupling bolt 710 and a second coupling nut 720, the third bolt hole 131 and the fourth bolt hole 231 being opposite to each other up and down, each second coupling bolt 710 being coupled with the second coupling nut 720 after passing through the third bolt hole 131 and the fourth bolt hole 231, respectively, to couple the first flange 10 and the second flange 20.

An embodiment of a second aspect of the present disclosure provides a tower comprising a first tower section and a second tower section connected to each other, the tower further comprising a flange connection assembly according to any of the above embodiments, wherein the first connecting section is fixedly connected to the first tower section and the second connecting section is fixedly connected to the second tower section.

Specifically, as an example, a first tower section is welded to a first connecting cylinder and a second tower section is welded to a second connecting cylinder.

The tower provided in this embodiment has the above flange connection assembly of any one of the embodiments, so that the tower has the above advantages of any one of the embodiments, and will not be described in detail herein.

A third aspect embodiment of the present disclosure provides a wind power plant comprising a tower according to any of the above embodiments.

The wind generating set provided by the embodiment of the present invention has the advantages of any one of the embodiments due to the tower barrel of any one of the embodiments, and is not described herein.

In a specific embodiment, as shown in fig. 4 and 5, the first flange 10 has a structure in which a plurality of circular third bolt holes 131 are uniformly formed in the first inner flange 130, and a first upper surface of the first outer flange 110 is provided with a groove structure, which forms an upper countersink 121, and a circular hole is formed below the groove structure as the first bolt hole 120 to guide the first connecting bolt 30.

Further, as shown in fig. 6, 7 and 8, the second flange 20 has a structure in which a plurality of circular fourth bolt holes 231 are uniformly formed in the second inner flange 230, a circular hole is formed in the second upper surface of the second outer flange 210 as the second bolt hole 220, a circular hole having a larger diameter is formed at the lower end portion separately as the sinking groove 221, and the first connecting bolt 30 and the first connecting nut 40 are penetrated and guided and fastened. And radial through holes 60 are uniformly distributed in the radial direction of the inner ring of the second flange 20, so that the screw driving member 50 can penetrate into the radial through holes 60 to drive the first coupling nut 40.

Further, as shown in fig. 9 and 10, the second end 520 of the screw driving member 50 has a polygonal column structure, which is convenient for the connection and rotation of the power tool, and the cylindrical portion of the first end 510 has a driving thread (in the shape of a worm) for contacting and connecting with the first connecting nut 40, wherein, as shown in fig. 12, the inner ring of the first connecting nut 40 has a conventional thread, and the outer ring has a worm-shaped structure, and has a mating tooth 410 capable of being in driving engagement with the driving thread.

Further, the flange connection assembly further includes a spacer for being provided at the first connection bolt 30 and/or the second connection bolt 710.

Further, the bolt cover plate 810 is mounted on the first flange 10 by a plurality of fasteners such as screws; and/or the nut cover 820 is mounted to the second flange 20 by fasteners such as a plurality of screws.

Further, as shown in fig. 3 and 11, the bolt head 310 of the first connecting bolt 30 is preferably in a quadrangular prism structure, the edges of the edges are rounded, the bolt head 310 of the polygonal prism is engaged with the countersink 121 on the first flange 10, the bolt rod 320 is in a cylindrical shape, the cylindrical portion is provided with threads, and the rounded edges of the cylindrical end conveniently penetrate into the first connecting nut 40.

Further, as shown in fig. 12, the inner ring of the first connecting nut 40 has a threaded structure for fixedly connecting with the first connecting bolt 30, and the outer ring of the first connecting nut 40 has a worm gear structure for contacting with the screwing driving member 50 to rotate synchronously, so that the first connecting nut 40 can be screwed into the first connecting bolt 30.

In the first embodiment, first, the first connecting bolt 30 is inserted into the first bolt hole 120 of the first flange 10, the upper countersunk groove 121 is exactly engaged with the polygonal bolt head 310 of the first connecting bolt 30, and the bolt cover 810 is additionally mounted on the upper portion of the upper countersunk groove, and the upper portion of the upper countersunk groove is fixed by fasteners such as screws, so that the first connecting bolt 30 is prevented from falling off during lifting, and a protective effect is achieved.

Then, the first coupling nut 40 is inserted into the sinking groove 221 of the second flange 20 and is protected by the nut cover plate 820, preventing falling off during the lifting, and a circular hole is opened in the middle of the nut cover plate 820 for the first coupling bolt 30 to pass out.

Further, the first flange 10 is hoisted to be assembled with the second flange 20, in the process of assembling the first flange 10 with the second flange 20, the first bolt hole 120 is ensured to be aligned with the second bolt hole 220, the first connecting bolt 30 penetrates into the first connecting nut 40, the screwing driving piece 50 penetrates into the tower barrel through the radial through hole 60 on the side wall of the second flange 20, the polygonal prism structure of the screwing driving piece 50 is connected with an electric rotary tool for fastening, the transmission thread of the screwing driving piece 50 interacts with the matching teeth 410 of the outer ring of the first connecting nut 40, the screwing driving piece 50 only performs rotary motion relative to the second flange 20, no displacement stroke exists, and the first connecting nut 40 can be rotationally fastened with the first connecting bolt 30 under the rotary action.

Further, the first and second inner flanges 130 and 230 may be fixed by the second coupling bolts 710 and the second coupling nuts 720.

When the connecting bolts are maintained, maintenance of the first connecting bolts 30, the first connecting nuts 40, the second connecting bolts 710 and the second connecting nuts 720 can be completed only in the tower.

In the second embodiment, first, the first connecting nut 40 is inserted into the sinking groove 221 of the second flange 20 and is protected by the nut cover plate 820, so as to prevent the first connecting nut from falling off during the lifting, and a circular hole is formed in the middle of the nut cover plate 820 for the first connecting bolt 30 to pass through.

Then, the first coupling bolts 30 are inserted into the first bolt holes 120 of the first flange 10, and the upper countersunk grooves 121 are exactly fitted into the polygonal bolt heads 310 of the first coupling bolts 30.

Further, the first flange 10 is hoisted to be assembled with the second flange 20, in the process of assembling the first flange 10 with the second flange 20, the first bolt hole 120 is ensured to be aligned with the second bolt hole 220, the first connecting bolt 30 is contacted with the first connecting nut 40, the screwing driving piece 50 is penetrated into the tower through the radial through hole 60 on the side wall of the second flange 20, the polygonal prism structure of the screwing driving piece 50 is connected with an electric rotary tool for fastening, the transmission thread of the screwing driving piece 50 interacts with the matching teeth 410 of the outer ring of the first connecting nut 40, the screwing driving piece 50 only performs rotary motion relative to the second flange 20, no displacement stroke exists, and the first connecting nut 40 can be rotationally fastened with the first connecting bolt 30 under the rotary action.

Further, the bolt cover plate 810 is additionally installed on the upper portion of the first connecting bolt 30, and the first connecting bolt is fixed by a fastener such as a screw, thereby having the functions of dust prevention and rain prevention. In this case, the bolt cover 810 may be directly installed outside the tower, and since the installation is performed in the initial installation stage of the wind turbine generator system, the number of devices such as the crane and the crane on the installation site is large, and the installer may directly stand on the devices to install the bolt cover 810.

Further, the first and second inner flanges 130 and 230 may be fixed by the second coupling bolts 710 and the second coupling nuts 720.

When the connecting bolts are maintained, maintenance of the first connecting bolts 30, the first connecting nuts 40, the second connecting bolts 710 and the second connecting nuts 720 can be completed only in the tower.

Although embodiments of the present utility model have been described in detail hereinabove, various modifications and variations may be made to the embodiments of the utility model by those skilled in the art without departing from the spirit and scope of the utility model. It will be appreciated that such modifications and variations will be apparent to those skilled in the art that they will fall within the spirit and scope of the embodiments of the utility model as defined in the appended claims.

Claims (13)

1. A flange connection assembly, the flange connection assembly comprising:

A first flange (10) comprising a first connecting cylinder and a first outer flange (110) connected to the outer periphery of the first connecting cylinder, wherein a plurality of first bolt holes (120) are formed in the first outer flange (110) at intervals along the circumferential direction of the first flange (10);

A second flange (20) including a second connection cylinder and a second outer flange (210) connected to the outer periphery of the second connection cylinder, wherein a plurality of second bolt holes (220) are formed in the second outer flange (210) at intervals along the circumferential direction of the second flange (20);

The plurality of first connecting assemblies comprise first connecting bolts (30) and first connecting nuts (40), the first bolt holes (120) and the second bolt holes (220) are opposite to each other up and down, and each first connecting bolt (30) is combined with the first connecting nut (40) after passing through the first bolt holes (120) and the second bolt holes (220) respectively;

The screwing driving piece (50) is provided with a radial through hole (60) on the side wall of the second connecting cylinder, and the screwing driving piece (50) can be inserted into the radial through hole (60) from the inner side of the second connecting cylinder to drive the first connecting nut (40) to be screwed relative to the first connecting bolt (30).

2. Flange connection assembly according to claim 1, characterized in that the screw drive (50) is formed as a worm, the outer circumference of the first connection nut (40) forming a worm wheel structure cooperating with the worm.

3. The flange connection assembly according to claim 1, wherein the first outer flange (110) has a first upper surface and a first lower surface facing each other, the second outer flange (210) has a second upper surface and a second lower surface facing each other, the first lower surface and the second upper surface facing each other, the first connection bolt (30) penetrates into a first bolt hole (120) and a second bolt hole (220) from the first upper surface in order downward and then is coupled with the first connection nut (40), and the radial through hole (60) extends to one side of the second bolt hole (220) in a circumferential direction of the second flange (20).

4. A flange connection assembly according to claim 3, characterized in that a sinking groove (221) communicating with the second bolt hole (220) is formed on the second lower surface, the first connection nut (40) is provided in the sinking groove (221), and the radial through hole (60) communicates with the sinking groove (221).

5. The flange connection assembly according to claim 4, further comprising a nut cover plate (820), the nut cover plate (820) being attached to the second lower surface, the first coupling nut (40) being retained in the sink (221).

6. A flange connection assembly according to claim 3, characterized in that the first upper surface is provided with an countersink (121) communicating with the first bolt hole (120), the bolt head (310) of the first connection bolt (30) being arranged in the countersink (121).

7. The flange connection assembly of claim 6, wherein the flange is formed from a plurality of flange plates,

The cross section of the bolt head (310) is non-circular, and the upper sinking groove (121) is matched with the bolt head (310) so as to limit the bolt head (310) to rotate in the circumferential direction in the upper sinking groove (121).

8. The flange connection assembly of claim 6, further comprising a bolt cover plate (810), the bolt cover plate (810) being attached to the first upper surface, the first connection bolt (30) being retained in the first bolt hole (120).

9. The flange connection assembly according to claim 2, characterized in that a transmission thread is provided on a side wall of the first end of the screw driver (50), and a mating tooth (410) is formed on an outer side wall of the first connection nut (40), the transmission thread and the mating tooth (410) being capable of being engaged with each other to drive the first connection nut (40) to rotate around the first connection bolt (30).

10. Flange connection assembly according to claim 2, wherein the second end of the screw drive (50) is formed as a prismatic structure.

11. The flange connection assembly according to claim 1, wherein the first flange (10) is a T-shaped flange, further comprising a first inner flange (130) connected to an inner peripheral side of the first connecting cylinder;

The second flange (20) is a T-shaped flange, and further includes a second inner flange (230) connected to an inner peripheral side of the second connecting cylinder.

12. A tower comprising first and second tower sections connected to each other, wherein the tower further comprises a flange connection assembly according to any one of claims 1 to 10, wherein the first connecting section is fixedly connected to the first tower section and the second connecting section is fixedly connected to the second tower section.

13. A wind power plant, characterized in that it comprises a tower according to claim 11.