FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
Title of invention:
CONNECTING STRUCTURE FOR STEEL TUBE TRUSS AND TOWER
BARREL OF LATTICE WIND POWER GENERATION TOWER,
PRESTRESSED POLYGON WIND TOWER PROVIDED WITH CIRCULAR
BOX GIRDER FOR DIRECT FAN ON TOP OF TOWER, WIND POWER
GENERATION TOWER, AND WIND TOWER HAVING PRESTRESSED
ANTI-FATIGUE STRUCTURE
Applicant:
QINGDAO HUA-STRONG ENERGY TECHNOLOGY CO., LTD.
An University established in China,
having address:
No. 8, Zhejiang Road, Beiguan Industrial Park,
Jiaobei Subdistrict Office, Jiaozhou City Qingdao,
Shandong 266300, China
The following specification particularly describes the invention and the manner in
which it is to be performed.
2
CROSS REFERENCE TO RELATED APPLICATIONS
The present application claims priority of Chinese patent application No.
201710212768.9, entitled "Prestressed polygon wind tower with a direct-fan annular box
girder at a tower top" and filed with Chinese Patent Office on April 1, 2017;
5 priority of Chinese patent application No. 201710306188.6, entitled "Wind power
generation tower" and filed with Chinese Patent Office on May 4, 2017;
priority of Chinese patent application No. 201720203329.7, entitled "Wind tower with
a prestressed anti-fatigue combined structure" and filed with Chinese Patent Office on
March 03, 2017; and
10 priority of Chinese patent application No. 201721395756.6, entitled "Connection
structure for a steel pipe truss and a tower barrel of a lattice wind power generation tower ",
filed with Chinese Patent Office on October 27, 2017, the entire contents of which are
incorporated in the present application by reference.
15 TECHNICAL FIELD
The present disclosure relates to the technical field of wind power generation towers,
to be more specific, relates to a connecting structure for a steel tube truss and a tower barrel
of a lattice wind power generation tower，a prestressed polygon wind tower provided with a
direct-fan circular box girder on the top of the tower，a wind power generation tower, and a
20 wind tower having a prestressed anti-fatigue structure.
BACKGROUND
Wind power generation technology, which requires fuel and a small occupied area and
is clean and environmentally friendly, has increasingly become a key development field of
25 the country. As a generator support member, the wind power generation tower frame needs
to be light and stable, which can ensure a strong carrying capacity and take into account
economic costs.
For the lattice wind power generation tower frame, the transition section connecting
30 the lattice steel tube truss and the fan tower barrel is an important structure, which suffers
3
from large action force and has concentrated force positions, therefore, in the design of the
lattice wind tower, the connecting transition of the steel tube truss to the fan tower barrel is
a difficult point in the design of the lattice wind tower. The inventors found in the research
that the connecting transition of the conventional steel tube truss to the fan tower barrel has
5 at least the following disadvantages: 1. the connection mode and the connection
relationship are complicated, resulting in waste of the manufacturing materials; and 2. the
ability to withstand stress at the connection position is poor, causing that breakage
accidents easily occur.
10 SUMMARY
The object of the present disclosure includes providing a connecting structure for a
steel tube truss and a tower barrel of a lattice wind power generation tower, which
improves the deficiencies of the prior art, can simplify the connection mode between the
tower barrel and the lattice tower frame, resolve the stress problem，enable the force
15 transmission of a transition section to be direct and save materials.
The object of the present disclosure also includes providing a prestressed polygon
wind tower provided with a direct-fan circular box girder on the top of the tower, which has
all the characteristics of the connecting structure of the steel tube truss and the tower barrel
20 of the lattice wind power generation tower, can be convenient for the connection between
the tower body and the engine room, simplify the connection mode of the transition portion,
reduce the amount of material used, and transmit the force directly.
The object of the present disclosure also includes providing a wind power generation
25 tower having all the characteristics of the connecting structure of the steel tube truss and
the tower barrel of the lattice wind power generation tower, which can adapt to the running
space requirement of a blade, simplify the manufacturing and installation steps, reduce
costs and increase production efficiency.
30 The object of the present disclosure also includes providing a wind tower having a
prestressed anti-fatigue structure, with the wind tower having all the characteristics of the
4
connecting structure of the steel tube truss and the tower barrel of the lattice wind power
generation tower, and capable of enhancing the utilization rate of materials, prolonging
fatigue life and being easy to construct.
5 To achieve at least one of the objects of the present disclosure, the present disclosure is
implemented as follows.
In one aspect, the present disclosure provides a connecting structure of a steel tube
truss and a tower barrel of a lattice wind power generation tower, wherein the steel tube
10 truss and the tower barrel are connected through a transition section; said steel tube truss
has a plurality of steel tube tower pillars, the upper end portion of each of the steel tube
tower pillars has a U-shaped groove, the barrel wall of the transition section is inserted into
the U-shaped groove and fixedly connected with the steel tube tower pillars by butt welds;
a pore remains at the lower end portion of the U-shaped groove; and the barrel wall of the
15 transition section has a semi-circular groove between every two steel tube tower pillars.
Specifically, said steel tube truss comprises steel tube tower pillars, cross bars and
diagonal bars, there are n steel tube tower pillars, which are connected with each other by
the cross bars in the horizontal direction and have lateral faces connected by the diagonal
20 bars, constituting a steel-structure lattice tower body with a cross section being in a shape
of n-regular polygon, wherein n is an integer greater than or equal to 4.
In another aspect, a prestressed polygon wind tower provided with a direct-fan circular
box girder on the top of the tower is also provided, which comprises a steel-structure lattice
25 tower body, a fan-engine-room connection flange and the circular box girder, wherein said
circular box girder is connected to the top of the steel-structure lattice tower body, said
steel-structure lattice tower body comprises tower pillars, cross bars, diagonal bars, each of
said tower pillars is provided therein with a prestressed steel strand, said circular box girder
comprises the upper flperge of the circular box girder, the web plate of the circular box
30 girder, the lower flperge of the circular box girder, a ring-girder bottom flange, wherein the
prestressed steel strands inside said tower pillars are anchored on the upper flperge of the
5
circular box girder, and said fan-engine-room connection flange is connected with the
circular box girder.
Specifically, said tower pillar is a steel tube, said cross bar and diagonal bar can be
5 made of a profile steel or a double C-type section steel formed by bending.
Optionally, said fan-engine-room connection flange is connected to the circular box
girder through a first bolt A, which is at the inner side of the upper flperge of the circular
box girder.
10
Optionally, the top of said tower pillar is provided with a tower-pillar top flange, said
lower flperge of the circular box girder is provided with a ring-girder bottom flange, and
said tower-pillar top flange is connected to the ring-girder bottom flange through a second
bolt B.
15
In another aspect, a wind power generation tower is also provided, which comprises a
tower frame and a tower barrel disposed above the tower frame, wherein the tower frame
and the tower barrel are connected with each other by a circular box girder.
20 Specifically, the tower frame includes prestressed tower pillars; and the bottom of the
circular box girder is connected to the prestressed tower pillars through a pillar top flange.
Optionally, prestressed steel strands are disposed inside and pass through the prestressed
tower pillar.
25 Optionally, the prestressed steel strands pass through the circular box girder and an
inverted T-type flange.
Specifically, the inverted T-type flange and the circular box girder are connected with
each other by a bolt which passes through the circular box girder.
30
Optionally, the tower frame further comprises diagonal bars and cross bars respectively
connected to the prestressed tower pillar.
6
Optionally, a transition portion is connected between the tower barrel and the circular
box girder.
Optionally, the transition portion is connected to the circular box girder through the
5 inverted T-shaped flange.
Optionally, the bottom of the tower barrel is connected to the transition portion through
a bottom flange.
10 Specifically, the transition portion is divided into the fragments by a longitudinal
flange.
In another aspect, a wind tower having a prestressed anti-fatigue structure is also
provided, comprising a tower barrel, a transition structure, a framed tower frame, and a
15 base fixing device, wherein said tower barrel is fixed within the transition structure, said
transition structure is located at the top of the framed tower frame, said framed tower frame
is mounted on the base fixing device, wherein said framed tower frame comprises tower
pillars, prestressed steel strands, diagonal bars, cross bars, cross sills, subdivided web rods
and subdivided cross sills, the bottom end of each tower pillar is fixed in the base fixing
20 device by a prestressed anchor bolt, said prestressed steel strand penetrates from the bottom
of the tower pillar to the top thereof, the top end of the prestressed steel strand is tensioned
and fixed to the top of the tower pillar, the bottom end of the prestressed steel strand is
anchored in a cable anchor fixation section in the base fixing device; said diagonal bars are
crosswise fixed to the tower pillars through gusset plates (joint plates) and bolts, said cross
25 bars are horizontally fixed to the tower pillars through gusset plates and bolts; said cross
sills are fixed to the cross bars through gusset plates and the bolts; and subdivided web rods
are installed between said diagonal bars and the cross bars, and subdivided cross sills are
installed between said cross bars and the cross sills.
30 In conclusion, compared to the prior art, the beneficial effect of the present disclosure
include at least:
7
simplifying the connection mode between the tower barrel and the lattice tower frame,
resolving the stress problem, enabling the force transmission of a transition section to be
direct and saving materials; adapting to the running space requirement of the blade,
simplifying the manufacturing and installation steps, reducing costs and increasing
5 production efficiency; and prolonging fatigue life, and being convenient to construct.
BRIEF DESCRIPTION OF DRAWINGS
In order to illustrate the technical solutions of the embodiments of the present
disclosure more clearly, the accompanying drawings required to be used in the
10 embodiments will be briefly introduced below, it should be understood that the following
accompanying drawings show only certain embodiments of the present disclosure, thus it
should not be seen as a limitation to the scope. To those ordinary skilled in the art, other
related accompanying drawings can also be obtained according to these accompanying
drawings, under the premise of doing no creative work.
15
Fig.1 is a structural schematic view of a connecting structure for a steel tube truss and
a tower barrel of a lattice wind power generation tower, applied to a lattice wind tower,
provided by an embodiment of the present disclosure;
Fig.2 is a structural schematic view showing connection between a transition section
20 and tower pillars of a steel tube truss;
Fig.3 shows connection form of a tower pillar of a steel tube truss and a barrel wall of
a transition section;
Fig.4 shows a form of a U-shaped groove of a tower pillar of a steel tube truss;
Fig.5 is a structural schematic view of a prestressed polygon wind tower provided with
25 a direct-fan circular box girder on the top of the tower, provided by an embodiment of the
present disclosure;
Fig.6 is a structural schematic view of the top of a steel-structure lattice tower body;
Fig.7 is a plan view of the upper surface of a circular box girder;
Fig.8 is a schematic plan view of connecting structure of the circular box girder and
30 the tower-pillar top flange;
8
Fig.9 is a plan view of the lower surface of a circular box girder;
Fig.10 is a schematic view of connecting structure of the circular box girder and the
top of the steel-structure lattice tower body;
Fig.11 is a structural schematic view of a wind power generation tower provided by an
5 embodiment of the present disclosure;
Fig.12 is a structural schematic view of the lower surface of a circular box girder of a
wind power generation tower;
Fig.13 is a plan view of the upper surface of a circular box girder of a wind power
generation tower;
10 Fig.14 is an elevation schematic view of the joint where the circular box girder and the
transition portion of a wind power generation tower is connected;
Fig.15 is a sectional view of a circular box girder of a wind power generation tower;
Fig.16 is a structural schematic view of a wind tower having prestressed anti-fatigue
structure provided by an embodiment of the present disclosure;
15 Fig.17 is a structural schematic view of a framed tower frame;
Fig.18 is a structural schematic view of a cross sill;
Fig.19 is a structural schematic view of the joint of a tower pillar;
Fig.20 is a structural schematic view of a double C-type steel cross bar and a double
C-type steel diagonal bar; and
20 Fig.21 is a structural schematic view of a base fixing device.
Reference signs: 1-tower barrel; 2-transition section; 3-steel-structure lattice tower
body; 4-semi-circular groove; 5-steel tube tower pillar; 6-diagonal bar; 7-cross bar; 8-pore;
9-butt weld; 10-U-type groove; 11- barrel wall of the transition section; 12-steel-structure
25 lattice tower body; 13-circular box girder; 14-tower pillar; 15-cross bar; 16-diagonal
bar;17-prestressed steel strand; 18-upper flperge of the circular box girder; 19-first bolt A;
20-ring-girder bottom flange; 21-second bolt B; 22-lower flperge of the circular box girder;
23-web plate of the circular box girder; 24-tower-pillar top flange; 25-fan-engine-room
connection flange; 26-tower barrel; 27-circular box girder; 28-prestressed tower pillar;
30 29-pillar top flange; 30-prestressed steel strand; 31-inverted T-type flange; 32-bolt;
9
33-diagonal bar; 34-cross bar; 35-transition portion; 36-bottom flange; 37-longitudinal
flange; 38-framed tower frame; 39-prestressed steel strand; 40-diagonal bar; 41-cross bar;
42-tower barrel; 43-transition structure; 44-gusset plate; 45-bolt; 46-cross sill; 47-base
fixing device; 48-tower pillar; 49-subdivided web rod; 50-subdivided cross sill; 51- cable
5 anchor fixation section; 52-prestressed anchor bolt.
DETAILED DESCRIPTION OF EMBODIMENTS
In order to make the objects, technical solutions and advantages of the embodiments of
the present disclosure clearer, the technical solutions in the embodiments of the present
10 disclosure are clearly and completely described below in combination with the
accompanying drawings in the embodiments of the present disclosure. Obviously, the
embodiments described are part of the embodiments of the present disclosure, but not all of
the embodiments. The components in the embodiments of the present disclosure, which are
described and illustrated in the accompanying drawings herein, may generally be arranged
15 and designed in various different configurations.
Therefore, the following detailed description for the embodiments of the present
disclosure provided in the accompanying drawings is not intended to limit the scope of the
present disclosure claimed to be protected, but to represent only the selected embodiments
20 of the present disclosure. Based on the embodiments in the present disclosure, all other
embodiments obtained by those ordinary skilled in the art under the premise of doing no
creative work fall within the protection scope of the present disclosure.
It should be noted that similar reference numerals and letters indicate similar items in
25 the following accompanying drawings. Therefore, once a certain item is defined in one
accompanying drawing, it is not necessary to further define and explain it in the subsequent
accompanying drawings.
In the description of the present disclosure, it should be illustrated that the orientation
30 or position relationship indicated by the terms "center", "upper", "lower", "left", "right",
"vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position
10
relationship shown in the accompanying drawings, or the orientation or position
relationship that is conventionally placed when the inventive product is used, which is only
for the convenience of describing the present disclosure and simplifying the description,
rather than indicating or implying that the device or element indicated must have a
5 particular orientation, is constructed and operated in a particular orientation, and thus is not
to be understood as a limitation on the present disclosure. Moreover, the terms "first,"
"second," "third," etc. are used merely to distinguish the description, and are not to be
understood as indicating or implying importance in relativity.
10 Moreover, the terms "horizontal", "vertical", "overhanging", and the like do not mean
that the parts are required to be absolutely horizontal or overhanging, but may be slightly
inclined. For example, "horizontal” simply means that its direction is more horizontal than
"vertical", and does not mean that this structure must be completely horizontal, but may be
slightly inclined.
15
In the description of the present disclosure, it should be further illustrated that, unless
otherwise specifically regulated and defined, the terms "set", "install", "link", and
"connect" should be a generalized understanding, for example, which may be a fixed
connection, may also be a detachable connection, or an integrated connection; may be a
20 mechanical connection, may also be an electrical connection; may be linked directly, may
also be linked indirectly through an intermediate medium, and may be an internal
connection between two elements. For those ordinary skilled in the art, the specific
meanings of the aforementioned terms in the present disclosure can be understood in the
specific situations.
25
Embodiment 1
The wind power generation tower as shown in Fig.1 comprises a steel-structure lattice
tower body 3 with a cross section in a shape of n-regular polygon, a tower barrel 1 and a
transition section 2. The lattice tower body 3 is a steel tube truss constituted by n steel tube
30 tower pillars 5, cross bars 7 and diagonal bars 6, with the steel tube truss connected to the
tower barrel 1 by the transition section 2. Figure 2 shows the connection part between the
11
transition section 2 and the steel tube tower pillars 5. A U-type groove 10 (as shown in
Fig.4) is provided at the upper end portion of the steel tube tower pillar 5, and the barrel
wall 11 of the transition section is inserted into the U-shaped groove 10. As shown in Fig.3,
the steel tube tower pillar 5 is connected with the barrel wall 11 of the transition section by
5 a butt weld 9, with a pore 8 remaining at the end portion of the U-type groove 10. The
transition section 2 is provided with a semi-circular groove 4 between every two steel tube
tower pillars 5 (see Fig. 2).
It should be illustrated that the steel-structure lattice tower body 3 is arranged to have a
10 cross section in a shape of n-regular polygon, to thereby ensure the structure and force
stability in each direction of the sides of the steel-structure lattice tower body 3, and reduce
the risk of rollover.
Specifically, as shown in Fig.1, said steel tube truss comprises steel tube tower pillars 5,
15 cross bars 7 and diagonal bars 6. There are n steel tube tower pillars 5, which are connected
with each other by the cross bars 7 in the horizontal direction and have lateral faces
connected by the diagonal bars 6, constituting the steel-structure lattice tower body 3 with a
cross section being in a shape of n-regular polygon, wherein n is an integer greater than or
equal to 4.
20
Optionally, integer n is set to be a number from 4 to 8. On the one hand, if the set
number n of the steel tube tower pillars 5 is less than 4, it is easy to cause reduced stability
of the wind power generation tower using the connecting structure for the tower barrel 1
and the steel-structure lattice tower body 3 of the present disclosure, thus it is difficult to
25 withstand the impact of the wind power from various directions. On the other hand, if the
set number n of the steel tube tower pillars 5 is greater than 8, it is easy to make the
structure relationship of the wind power generation tower complicated, resulting in the
waste of the manufacturing materials.
30 The type and use of the wind power generation tower in the embodiments of the
present disclosure are not specifically limited, as long as it is a steel-structure lattice power
12
generation tower.
Embodiment 2
The present embodiment is a prestressed polygon wind tower provided with a
5 direct-fan circular box girder on the top of the tower, having all the characteristics of the
connecting structure of the steel tube truss and the tower barrel of the lattice wind power
generation tower. The connecting structure having the steel tube truss and the tower barrel
of the lattice wind power generation tower described in Embodiment 1 is also applicable to
the present embodiment, and the technical solutions already disclosed in Embodiment 1 are
10 not repeatedly described.
Specifically, the difference between the present embodiment and Embodiment 1 is that
the present embodiment is a prestressed polygon wind tower provided with a direct-fan
circular box girder on the top of the tower. Referring to Fig.5-Fig.10, the prestressed
15 polygon wind tower provided with a direct-fan circular box girder on the top of the tower
in the present embodiment, as shown in Fig.5, comprises a steel-structure lattice tower
body 12 (similar to the steel-structure lattice tower body 3) and an circular box girder 13,
wherein said circular box girder 13 is connected to the top of the steel-structure lattice
tower body 12 (similar to the steel-structure lattice tower body 3), said steel-structure
20 lattice tower body 12 (similar to the steel-structure lattice tower body 3) comprises tower
pillars 14 (similar to the steel tube tower pillar 5), cross bars 15 and diagonal bars 16, and
as shown in Fig.10, also comprises a fan-engine-room connection flange 25. As shown in
Fig.6, said tower pillar 14 (similar to the steel tube tower pillar 5) is provided therein with a
prestressed steel strand 17. As shown in Fig.7, said circular box girder 13 comprises an
25 upper flperge 18 of the circular box girder. As shown in Fig.9, the circular box girder 13
comprises a web plate 23 of the circular box girder and a lower flperge 22 of the circular
box girder. As shown in Fig.8, the circular box girder 13 further comprises a ring-girder
bottom flange 20. As shown in Fig.10, the internal prestressed steel strand 17 of said tower
pillar 14 (similar to the steel tube tower pillar 5) is anchored on the upper flperge 18 of the
30 circular box girder, and said fan-engine-room connection flange 25 is connected to the
13
circular box girder 13.
Optionally, said steel-structure lattice tower body is configured as a regular octagonal
tower body or a regular hexagonal tower body.
5
Specifically, said tower pillar 14 (similar to the steel tube tower pillar 5) is a steel tube,
and said cross bar 15 and diagonal bar 16 can be made of a profile steel or a double C-type
section steel formed by bending.
10 Specifically, as shown in Fig.10, said fan-engine-room connection flange 25 is
connected to the circular box girder 13 through a first bolt A19, which is at the inner side of
the upper flperge 18 of circular box girder.
Optionally, as shown in Fig.10, the top of said tower pillar 14 (similar to the steel tube
15 tower pillar 5) is provided with a tower-pillar top flange 24, said lower flperge 22 of the
circular box girder is provided with a ring-girder bottom flange 20, and said tower-pillar
top flange 24 is connected to the ring-girder bottom flange 20 through a second bolt B21.
The aforementioned prestressed polygon wind tower provided with a direct-fan
20 circular box girder on the top of the tower can be convenient for the connection between
the tower body and the engine room, simplifying the connection mode of the transition
portion, reducing the amount of material used, and enabling direct force transmission.
Embodiment 3
25 The present embodiment is a wind power generation tower having all the
characteristics of the connecting structure of the steel tube truss and the tower barrel of the
lattice wind power generation tower. The connecting structure having the steel tube truss
and the tower barrel of the lattice wind power generation tower described in Embodiment 1
is also applicable to the present embodiment, and the technical solutions already disclosed
30 in Embodiment 1 are not repeatedly described.
Specifically, the difference between the present embodiment and Embodiment 1 is that
14
the present embodiment is a wind power generation tower. Referring to Fig.11-Fig.15, a
wind power generation tower of the present embodiment, as shown in Fig.11, comprises a
tower frame (similar to the tower pillar 14) and a tower barrel 26 (similar to the tower
barrel 1) disposed above the tower frame (similar to the tower pillar 14), wherein the tower
5 frame (similar to the tower pillar 14) and the tower barrel 26 (similar to the tower barrel 1)
are connected with each other through a circular box girder 27.
It can be seen that in the wind power generation tower of the present embodiment, a
framed tower frame is used at the bottom thereof, and a structure of the tower barrel is
10 arranged in the blade sweeping area of the top thereof. The tower frame and the tower
barrel are connected with each other by using the circular box girder, so that it is possible to
solve the problems of the dense members in the blade sweeping, the difficulty in
manufacture and installation, the increased cost, and the reduced production efficiency. For
the wind power generate tower, its structure is reasonable, the installation period is short, it
15 is possible to improve the efficiency, save the on-site labor and conform the concept of the
assembled structure, thus improving the utilization rate of materials and simplifying the
processes of manufacture and installation under the condition that the edge width of the top
of the tower frame is limited
20 Specifically, as shown in Fig.11, the tower frame (similar to the tower pillar 14)
comprises prestressed tower pillars 28. As shown in Fig.12, the bottom of the circular box
girder 27 (similar to the circular box girder 13) is connected to the prestressed tower pillar
28 through the pillar top flange 29. This makes it possible to reinforce the connecting
structure between the circular box girder 27 (similar to the circular box girder 13) and the
25 prestressed tower pillar 28.
Optionally, as shown in Fig.12, the prestressed steel strand 30 (similar to the
prestressed steel strand 17) are disposed inside and passes through the prestressed tower
pillar 28, which makes it possible to improve the anti-fatigue strength of the prestressed
30 tower pillar 28.
15
Optionally, as shown in Fig.2 and referring to Fig.3-Fig.5, the prestressed steel strand
30 (similar to the prestressed steel strand 17) passes through the circular box girder 27
(similar to the circular box girder 13) and an inverted T-type flange 31, which enables the
stability of the prestressed steel strand 30 (similar to the prestressed steel strand 17) to be
5 better, thereby improving the stability of the prestressed tower pillar 28.
Specifically, as shown in Fig.15, the inverted T-type flange 31 and the circular box
girder 27 (similar to the circular box girder 13) are connected by a bolt 32 passing through
the circular box girder 27 (similar to the circular box girder 13), which enables the fixing
10 structure of the inverted T-type flange 31 to be firmer and more reliable. Optionally, in
order to improve the strength, a high-strength bolt may be used as the bolt 32.
Optionally, as shown in Fig.11, the tower frame (similar to the tower pillar 14) further
comprises diagonal bars 33 (similar to the diagonal bar 6 and the diagonal bar 16) and cross
15 bars 34 (similar to the cross bar 7 and the cross bar 15), respectively connected to the
prestressed tower pillar 28, which enables the structure of the tower frame to form a stable
space truss.
Optionally, as shown in Fig.11, a transition portion 35 (similar to the transition section
20 2) is connected between the tower barrel 26 (similar to the tower barrel 1) and the circular
box girder 27 (similar to the circular box girder 13), this enables the reasonable connection
transition between the tower barrel 26 (similar to the tower barrel 1) and the circular box
girder 27 (similar to the circular box girder 13).
25 Optionally, as shown in Fig.15 and referring to Fig.11-14, the transition portion 35
(similar to the transition section 2) and the circular box girder 27 (similar to the circular
box girder 13) are connected with each other by the inverted T-shaped flange 31, which
enables reliable force transmission between the transition portion 35 (similar to the
transition section 2) and the circular box girder 27 (similar to the circular box girder 13).
30
Optionally, as shown in Fig.11, and referring to Fig.12-14, the bottom of the tower
16
barrel 26 (similar to the tower barrel 1) is connected to the transition portion 35 (similar to
the transition section 2) by a bottom flange 36, enabling the bottom of the tower barrel 26
(similar to the tower barrel 1) is connected to the transition portion 35 (similar to the
transition section 2) more firmly.
5
Specifically, as shown in Fig.13, the transition portion 35 (similar to the transition section 2)
is divided into the fragments by a longitudinal flange 37, which is able to solve the
transportation problem of the transition portion 35 (similar to the transition section 2).
10 In addition, in the wind power generation tower of the present embodiment, its tower
frame may be an N-regular-polygon tower frame, N=4~12. The prestressed tower pillar
may be a steel tube pillar. The cross bar and the diagonal bar may be made of a profile steel,
a C-type steel formed by bending a steel plate, or a steel tube. The tower barrel may be a
circular tower barrel. The transition portion may be divided into four pieces or two pieces
15 by the longitudinal flange(s). The inverted T-type flange may be connected to the top of the
circular box girder by high-strength bolts.
Embodiment 4
The present embodiment is a wind tower having a prestressed anti-fatigue combined
20 structure, having all the characteristics of the connecting structure of the steel tube truss
and the tower barrel of the lattice wind power generation tower. The connecting structure
having the steel tube truss and the tower barrel of the lattice wind power generation tower
described in Embodiment 1 is also applicable to the present embodiment, and the technical
solutions already disclosed in Embodiment 1 are not repeatedly described.
25
Specifically, the difference between the present embodiment and Embodiment 1 is that
the present embodiment is a wind tower having a prestressed anti-fatigue combined
structure. Referring to Fig.16-Fig.21, a wind tower having a prestressed anti-fatigue
combined structure in the present embodiment, as shown in Fig.16, comprises a tower
30 barrel 42 (similar to the tower barrel 26), a transition structure 43 (similar to the transition
portion 35), a framed tower frame 38 (similar to the steel-structure lattice tower body 12)
17
and a base fixing device 47, wherein said tower barrel 42 (similar to the tower barrel 26) is
fixed within the transition structure 43 (similar to the transition portion 35), said transition
structure 43 (similar to the transition portion 35) is located at the top of the framed tower
frame 38 (similar to the steel-structure lattice tower body 12), said framed tower frame 38
5 (similar to the steel-structure lattice tower body 12) is mounted on the base fixing device 47.
As shown in Fig.19, said framed tower frame 38 (similar to the steel-structure lattice tower
body 12) comprises a prestressed steel strand 39 (similar to the prestressed steel strand 30).
As shown in Fig.17, said framed tower frame 38 (similar to the steel-structure lattice tower
body 12) further comprises steel tube tower pillars 48 (similar to the prestressed tower
10 pillar 28), double C-type steel diagonal bars 40 (similar to the diagonal bar 33), double
C-type steel cross bar 41 (similar to the cross bar 34) and the subdivided web rods 49. As
shown in Fig.18, said framed tower frame 38 (similar to the steel-structure lattice tower
body 12) further comprises profile steel cross sills 46 and subdivided cross sills 50. As
shown in Fig.21, and combining Fig.17, the bottom end of the tower pillar 48 (similar to
15 the prestressed tower pillar 28) is fixed in the base fixing device 47 by a prestressed anchor
bolt 52. As shown in Fig.18, said prestressed steel strand 39 (similar to the prestressed steel
strand 30) penetrates from the bottom of the tower pillar to the top thereof. As shown in
Fig.17, the top end of the prestressed steel strand 39 (similar to the prestressed steel strand
30) is tensioned and fixed to the top of the tower pillar 48 (similar to the prestressed tower
20 pillar 28). As shown in Fig.21, the bottom end of the prestressed steel strand 39 (similar to
the prestressed steel strand 30) is anchored in the cable anchor fixation section 51 in the
base fixing device 47. As shown in Fig.17 and combining Fig.19, said double C-type steel
diagonal bar 40 (similar to the diagonal bar 33) is crosswise fixed onto the steel tube tower
pillar 48 (similar to the prestressed tower pillar 28) through a gusset plate 44 and a bolt 45
25 (not shown in Fig.17), said double C-type steel cross bar 41 (similar to the cross bar 34) is
horizontally fixed onto the steel tube tower pillar 48 (similar to the prestressed tower pillar
28) through the gusset plate 44 (not shown in Fig.18) and the bolt 45. As shown in Fig.18,
said profile steel cross sill 46 is fixed onto the double C-type steel cross bar 41 (similar to
the cross bar 34) through the gusset plate 44 and the friction-type high-strength bolt 45. As
30 shown in Fig.17, a subdivided web rod 49 is mounted between said double C-type steel
18
diagonal bar 40 (similar to the diagonal bar 33) and the double C-type steel cross bar 41
(similar to the cross bar 34). As shown in Fig.18, a subdivided profile steel cross sill 50 is
mounted between said double C-type steel cross bar 41 (similar to the cross bar 34) and the
profile steel cross sill 46.
5
It should be illustrated that, as shown in Fig.17, the top end of the prestressed steel
strand 39 (similar to the prestressed steel strand 30) is tensioned and fixed to the top of the
tower pillar 48 (similar to the prestressed tower pillar 28). The aforementioned tension is
also known as prestressed tension, which refers to that the tensile force is applied in the
10 member in advance so that the member to which such tensile force is applied is subjected
to tensile stress to thereby generate certain deformation to cope with the load received by
the structure itself, wherein these loads comprise the load of the own weight of the member,
wind load, snow load, seismic load effect, etc. Generally, common members used for
applying prestressed tension comprise steel strand, jack, anchor plate, clamping piece.
15
For the prestressed steel strand 39 in the present disclosure, the pre-compressed stress
is applied to the prestressed steel strand 39 in the tensioned module before bearing the
external load, so as to improve the resistance to bending and rigidity of the members, delay
the time of crack occurrence, and increase the durability of the prestressed steel strand 39.
20 In terms of mechanical structure, its meaning is that the prestressed steel strand 39 is made
to generate stress in advance, which has the benefit of being able to improve the rigidity of
the prestressed steel strand 39 itself and reduce the vibration and elastic deformation of the
prestressed steel strand 39 in use, so as to improve the elastic strength of the tensioned
module and make its original resistibility stronger.
25
Specifically, said diagonal bar 40 (similar to the diagonal bar 33) may be a double
C-type steel diagonal bar, said cross bar 41 (similar to the cross bar 34) may be a double
C-type steel cross bar, and said cross sill 46 may be a profile steel cross sill, so as to further
improve the anti-fatigue ability of the wind tower. Optionally, said tower pillar 48 (similar
30 to the prestressed tower pillar 28) is a steel tube tower pillars. Optionally, said bolt 45
connecting the cross bar 41 (similar to the cross bar 34) and the cross sill 46 is a
19
friction-type high-strength bolt.
It should be illustrated that in all of the embodiments of the present disclosure, only the
aforementioned structures of the power generation tower is mainly improved, other
5 functions, parts, and structures, which are not mentioned, when needed, may be
implemented with the parts and structures being able to achieve the corresponding
functions in the prior art.
The above description is only the preferred embodiments of the present disclosure, and
10 is not intended to limit the present disclosure, for those skilled in the art, various
modifications and changes may be made to the present disclosure. Any modifications,
equivalent substitutions, improvements and the like made within the spirit and principle of
the present disclosure are intended to be included within the protection scope of the present
disclosure.
15
Industrial Applicability
In conclusion, the present disclosure provides a connecting structure for a steel tube
truss and a tower barrel of a lattice wind power generation tower, as well as a prestressed
polygon wind tower provided with a direct-fan circular box girder on the top of the tower, a
20 wind power generation tower, and a wind tower having a prestressed anti-fatigue structure,
which can simplify the connection mode between the tower barrel and the lattice tower
frame, resolve the stress problem, enable the force transmission of a transition section to be
direct and save materials; adapt to the running space requirement of the blade, simplify the
manufacturing and installation steps, reduce costs and increase production efficiency; and
25 prolong fatigue life, and be convenient to construct.
20
WE CLAIM:
1. A connecting structure for a steel tube truss and a tower barrel of a lattice wind power
generation tower, wherein the steel tube truss is connected to the tower barrel through a
transition section; said steel tube truss has a plurality of steel tube tower pillars, an upper end
portion of each of the steel tube tower pillars is provided with a U-shaped groove, and a
barrel wall of the transition section is inserted into the U-shaped grooves and fixedly
connected with the steel tube tower pillars by butt welds; a pore remains at a lower end
portion of the U-shaped groove; and the barrel wall of the transition section is provided with
a semi-circular groove between every two steel tube tower pillars.
2. The connecting structure according to claim 1, wherein said steel tube truss comprises
the steel tube tower pillars, cross bars and diagonal bars, number of the steel tube tower
pillars is n, the steel tube tower pillars are connected with each other by the cross bars in a
horizontal direction and have lateral faces connected by the diagonal bars constituting a
steel-structure lattice tower body with a cross section in a shape of n-regular polygon,
wherein n is an integer greater than or equal to 4.
3. A prestressed polygon wind tower provided with a direct-fan circular box girder on a top
of the tower, wherein said prestressed polygon wind tower comprises a steel-structure lattice
tower body, a fan-engine-room connection flange and the circular box girder, said circular
box girder is connected to a top of the steel-structure lattice tower body, said steel-structure
lattice tower body comprises tower pillars, cross bars and diagonal bars, said tower pillars are
each provided therein with a prestressed steel strand, said circular box girder comprises an
upper flperge of the circular box girder, a web plate of the circular box girder, a lower flperge
of the circular box girder and a ring-girder bottom flange, the prestressed steel strand inside
said tower pillar is anchored on the upper flperge of the circular box girder, and said
fan-engine-room connection flange is connected with the circular box girder.
4. The prestressed polygon wind tower provided with a direct-fan circular box girder on a
top of the tower according to claim 3, wherein said tower pillars are each a steel tube, said
cross bars and diagonal bars are made of a profile steel, or a double C-type section steel
formed by bending.
5. The prestressed polygon wind tower provided with a direct-fan circular box girder on a
21
top of the tower according to claim 3, wherein said fan-engine-room connection flange is
connected to the circular box girder through a first bolt (A) at an inner side of the upper
flperge of the circular box girder.
6. The prestressed polygon wind tower provided with a direct-fan circular box girder on a
top of the tower according to claim 3, wherein a top of said tower pillar is provided with a
tower-pillar top flange, said lower flperge of the circular box girder is provided with the
ring-girder bottom flange, and said tower-pillar top flange is connected to the ring-girder
bottom flange through a second bolt (B).
7. A wind power generation tower, comprising a tower frame and a tower barrel disposed
above the tower frame, wherein the tower frame and the tower barrel are connected with each
other by a circular box girder.
8. The wind power generation tower according to claim 7, wherein the tower frame
comprises prestressed tower pillars, and a bottom of the circular box girder is connected to
the prestressed tower pillars through a pillar top flange.
9. The wind power generation tower according to claim 8, wherein a prestressed steel
strand is disposed inside and passes through the prestressed tower pillar.
10. The wind power generation tower according to claim 9, wherein the prestressed steel
strand passes through the circular box girder and an inverted T-type flange.
11. The wind power generation tower according to claim 10, wherein the inverted T-type
flange and the circular box girder are connected with each other by a bolt which passes
through the circular box girder.
12. The wind power generation tower according to claim 8, wherein the tower frame further
comprises diagonal bars and cross bars respectively connected to the prestressed tower
pillars.
13. The wind power generation tower according to claim 10, wherein a transition portion is
connected between the tower barrel and the circular box girder.
14. The wind power generation tower according to claim 13, wherein the transition portion
is connected to the circular box girder through the inverted T-shaped flange.
22
15. The wind power generation tower according to claim 14, wherein a bottom of the tower
barrel is connected to the transition portion through a bottom flange.
16. The wind power generation tower according to claim 13, wherein the transition portion
is divided into fragments by a longitudinal flange.
17. A wind tower having a prestressed anti-fatigue structure, comprising a tower barrel, a
transition structure, a framed tower frame and a base fixing device, wherein said tower barrel
is fixed within the transition structure, said transition structure is located at a top of the
framed tower frame, said framed tower frame is mounted on the base fixing device, wherein
said framed tower frame comprises tower pillars, prestressed steel strands, diagonal bars,
cross bars, cross sills, subdivided web rods and subdivided cross sills, bottom ends of the
tower pillars are fixed in the base fixing device by prestressed anchor bolts, said prestressed
steel strands each penetrate from the bottom of one respective tower pillar to a top of the
respective tower pillar, a top end of each of the prestressed steel strands is tensioned and
fixed to the top of the respective tower pillar, a bottom end of the prestressed steel strand is
anchored in a cable anchor fixation section in the base fixing device; said diagonal bars are
crosswise fixed to the tower pillars through gusset plates and bolts, said cross bars are
horizontally fixed to the tower pillars through gusset plates and bolts; said cross sills are fixed
to the cross bars through gusset plates and bolts; the subdivided web rods are each installed
between one respective diagonal bar and one respective cross bar, and subdivided cross sills
are each installed between one respective cross bar and one respective cross sill.