CN109458303B

CN109458303B - Tower and wind generating set

Info

Publication number: CN109458303B
Application number: CN201811610331.1A
Authority: CN
Inventors: 王珺; 王永刚; 李汉青
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2022-11-01
Anticipated expiration: 2038-12-27
Also published as: CN109458303A

Abstract

The invention provides a tower frame and a wind generating set. The tower comprises a first truss structure, wherein the first truss structure comprises at least two first single trusses, and the at least two first single trusses are connected end to end in the circumferential direction of the tower to form a closed structure with a first inner space. According to the tower disclosed by the invention, the manufacturing cost can be reduced while the quality is ensured.

Description

Tower and wind generating set

Technical Field

The invention relates to the technical field of wind power generation, in particular to a tower and a wind generating set.

Background

At present, the tower structure of the wind generating set mainly comprises a steel tower, a flexible tower and a concrete tower, and the common characteristic of the three towers is that the towers are all in a totally-enclosed structure.

With the increasingly fierce competition of the wind power industry and the proposal of the concept of 'wind and fire equivalence', the manufacturing cost of the tower needs to be reduced while the quality of the tower is ensured. In a steel-concrete structural tower commonly used in a high tower unit, steel and concrete have large weights and high manufacturing costs.

Therefore, it is desirable to provide a tower that can ensure the quality of the tower and reduce the manufacturing cost of the tower.

Disclosure of Invention

The invention aims to provide a tower and a wind generating set, which can ensure the quality and reduce the manufacturing cost at the same time.

According to an aspect of the invention, a tower may be provided, the tower comprising a first truss structure comprising at least two first individual trusses connected end to end in a circumferential direction of the tower enclosing a closed structure having a first interior space.

Optionally, the tower may further include a second truss structure disposed at an upper end of the first truss structure and connected to the first truss structure, the second truss structure enclosing a second interior space, the second interior space being disposed coaxially with the first interior space.

Optionally, the tower may further include a third truss structure disposed at an upper end of the second truss structure and connected to the second truss structure, the third truss structure enclosing a third interior space, the third interior space being disposed coaxially with the second interior space.

Alternatively, the second truss structure may include at least two second individual trusses circumferentially connected end to define a second interior space, and the third truss structure may include at least two third individual trusses circumferentially connected end to define a third interior space.

Alternatively, the number of the first, second and third mono-trusses may be the same in the circumferential direction of the tower.

Alternatively, each of the first, second, and third unitary trusses may have a polyhedral frame structure, which may include a first planar frame enclosing a portion of a respective one of the first, second, and third interior spaces.

Alternatively, the first truss structure, the second truss structure, and the third truss structure may be connected to each other by connecting vertically adjacent first planar frames to each other.

Optionally, each of the first, second, and third mono-trusses may further include a first baffle laid on the first planar frame.

Optionally, each of the first, second, and third individual trusses may further include a splice bracket protruding from both sides of the first planar frame for connecting the adjacent first planar frames to each other, and each of the first, second, and third truss structures may further include a second barrier connecting the adjacent first planar frames to each other, the second barrier being disposed on the splice bracket.

Alternatively, the number of the first single-body truss, the second single-body truss and the third single-body truss may be three in the circumferential direction of the tower.

Alternatively, the tower may comprise a plurality of second truss structures connected to each other in the vertical direction.

Optionally, the tower may further comprise a fixing flange provided at the bottom of the first truss structure, and the top end of the first planar frame of the third truss structure may be provided with an upper flange.

Optionally, the splice holder may comprise: the first splicing support is arranged on one side of the first plane frame; and the second splicing support is arranged on the other side of the first plane frame, wherein the second splicing support is inserted between the first splicing supports and fixed to the first splicing supports between the adjacent first plane frames.

Optionally, each of the first single truss, the second single truss and the third single truss may further include positioning rods disposed on both sides of the first planar frame and extending laterally.

Optionally, the first truss structure may further include a second barrier disposed between the adjacent first unit trusses, both sides of the second barrier may be welded to the adjacent first unit trusses, respectively, and a tower door may be disposed on the second barrier.

Alternatively, the third truss structure may include a third platform and a fourth platform disposed in the third interior space, the fourth platform being disposed above the third platform.

According to another aspect of the invention, a wind power plant may also be provided, comprising a tower as above.

According to the tower disclosed by the invention, the manufacturing cost can be reduced while the quality is ensured.

According to the tower disclosed by the invention, a turbulence device can be omitted, and the turbulence effect is improved.

According to the tower disclosed by the invention, the upper limit of the hoisting wind speed can be improved, and the hoisting window period is prolonged.

The tower provided by the invention is formed by splicing the single trusses, so that the transportation efficiency of the single trusses is improved. Meanwhile, compared with a split steel tower frame, the truss type truss has the advantages of simplicity in assembly, high assembly efficiency and the like.

In addition, the tower of the present invention is easy to dismantle and the manufacturing method is very simple.

Drawings

FIG. 1 is a perspective view of a tower according to an embodiment of the present invention;

FIG. 2 is a perspective view of a first truss structure of a tower according to an embodiment of the invention;

FIG. 3 is a perspective view of a second truss structure of a tower according to an embodiment of the invention;

FIG. 4 is a top view of a second truss structure of a tower according to an embodiment of the invention;

fig. 5 is a perspective view of a one-piece truss according to an embodiment of the invention;

FIG. 6 is a perspective view of a third truss structure of a tower according to an embodiment of the invention;

FIG. 7 is a perspective view of the second truss structure of FIG. 6 with a portion removed;

FIG. 8 is a top view of a third truss structure of a tower in accordance with an embodiment of the invention.

In the drawing, 100 is a first truss structure, 110 is a first single truss, 100a is a first internal space, 200 is a second truss structure, 200a is a second internal space, 300 is a third truss structure, 300a is a third internal space, 400 is a fixing flange, 410 is a bolt hole, 210 is a second single truss, 310 is a third single truss, 220 is a second baffle plate, 121 is a tower door, 211 is a first plane frame, 212 is a second plane frame, 213a is an upper plane frame, 213b is a lower plane frame, 214 is two side plane frames, 211-1 is a vertical rod, 211-2 is an upper chord, 211-3 is a lower chord, 211-4 is a web member, 211-5 is a reinforcing rod, 219 is an ear plate, 216 is a splicing support, 216a is a first splicing support, 216b is a second splicing support, 215 is a first baffle, 217 is a positioning rod, 218 is a connecting hole, 140 is a first platform, 150 is a cable fixing clamping plate, 160 is a manhole, 170 is a tower climbing ladder, 180 is a platform cover plate, 240 is a second platform, 250 is a cable fixing clamping plate, 260 is a manhole, 270 is a tower climbing ladder, 280 is a platform cover plate, 290 is an elevator hole, 290a is a guardrail, 320 is a third platform, 330 is a fourth platform, 350 is a cable fixing clamping plate, 360 is a manhole, 370 is a tower climbing ladder, 390 is an elevator hole, 390a guardrail and 380 is an upper flange.

Detailed Description

Hereinafter, a tower according to an embodiment of the present invention will be described with reference to fig. 1 to 8.

A tower according to an embodiment of the invention may comprise a first truss structure 100, and the first truss structure 100 may comprise at least two first individual trusses 110, the at least two first individual trusses 110 being connected end to end in a circumferential direction of the tower, enclosing a closed structure having a first inner space 100 a.

The tower according to the embodiment of the present invention may further include a second truss structure 200, the second truss structure 200 being disposed at an upper end of the first truss structure 100 and connected to the first truss structure 100, the second truss structure 200 enclosing a second inner space 200a, the second inner space 200a being disposed coaxially with the first inner space 100 a. Although the tower shown in fig. 1 includes one second truss structure 200 according to an embodiment of the present invention, the present invention is not limited thereto, and the tower may include a plurality of second truss structures 200 connected to each other in a vertical direction according to the limitation of the overall height of the tower and the transportation condition.

In addition, the tower according to the embodiment of the present invention may further include a third truss structure 300, the third truss structure 300 being disposed at an upper end of the second truss structure 200 and connected to the second truss structure 200, the third truss structure 300 enclosing a third inner space 300a, the third inner space 300a being disposed coaxially with the second inner space 200 a.

As shown in fig. 1, a tower according to an embodiment of the present invention may include a first truss structure 100, a second truss structure 200, and a third truss structure 300 that are sequentially stacked and connected in a vertical direction. However, the tower of embodiments of the present invention may also not include the second truss structure 200 and the third truss structure 300 or the third truss structure 300. Specifically, a tower according to an embodiment of the present invention may include a first truss structure 100 and a conventional tower disposed at an upper end of the first truss structure 100, or a tower according to an embodiment of the present invention may include a first truss structure 100, a second truss structure 200, and a conventional tower disposed at an upper end of the second truss structure 200. That is, the tower according to embodiments of the present invention may be a purely truss tower or a combination of a truss tower and a conventional tower.

As shown in fig. 1, the tower according to the embodiment of the present invention may further include a fixing flange 400 fixed to the bottom of the first truss structure 100. The fixing flange 400 may be provided with bolt holes 410 for connection with anchor bolts on a tower foundation (not shown) to fix the first truss structure 100 to the tower foundation.

As shown in fig. 1, 2, 3 and 6, the first truss structure 100 according to an embodiment of the present invention may include at least two first unit trusses 110 connected end to end in a circumferential direction of the tower to enclose a first internal space 100 a. Preferably, the second truss structure 200 may include at least two second single trusses 210 connected end to end in the circumferential direction of the tower to enclose the second internal space 200a, and the third truss structure 300 may include at least two third single trusses 310 connected end to end in the circumferential direction of the tower to enclose the third internal space 300a.

As shown in fig. 1, the first, second, and

third cell trusses

110, 210, and 310 may have substantially the same structure. It should be understood, however, that the dimensions of the first, second, and

third cell trusses

110, 210, 310 may not be exactly the same, depending on the specific design of the tower. In addition, as shown in fig. 1, the number of the first, second and third single-

unit girders

110, 210 and 310 may be the same as each other in the circumferential direction of the tower. For example, each of the first, second, and

third cell trusses

110, 210, and 310 may be 3 in number in the circumferential direction of the tower to form a support structure having an approximately triangular cross section. Since the stability of the triangular structure is good, the stability of the first truss structure 100 may be improved when the first truss structure 100 includes three first individual trusses 110, however, the present invention is not limited thereto.

In addition, as shown in fig. 1, in the axial direction of the tower, the first truss structure 100 and the second truss structure 200 may be connected to each other by connecting the first single truss 110 and the second single truss 210 to each other, and the second truss structure 200 and the third truss structure 300 may be connected to each other by connecting the second single truss 210 and the third single truss 310 to each other. Hereinafter, the first truss structure 100, the second truss structure 200, and the third truss structure 300 will be described in detail.

According to the embodiment of the present invention, the first truss structure 100 may be a unitary structure or a separate structure as long as it is ensured that the fixing flange 400 fixed to the bottom of the first truss structure 100 is a unitary structure. This is because the fixing flange 400 is connected to the tower foundation, and if the fixing flange 400 is a split structure, the requirement for the splicing accuracy of the fixing flange 400 is very high, which increases the construction difficulty.

When the first truss structure 100 is a unitary structure, as shown in fig. 2, a plurality of first individual trusses 110 of the first truss structure 100 may be welded to each other to form a unitary structure and may be welded to the fixing flange 400. Preferably, in order to enlarge the first internal space 100a and facilitate the installation of the tower door, the first truss structure 100 may further include a second barrier 220, and both sides of the second barrier 220 may be respectively welded to the adjacent first unit trusses 110, thereby connecting the first unit trusses 110 to each other. As shown in fig. 2, a tower door 121 may be provided on the second shutter 220.

According to an embodiment of the present invention, the first truss structure 100 may also be a split structure, the first truss structure 100 may include at least two first unit trusses 110 detachably connected to each other, and the first truss structure 100 may be detachably fixed to the fixing flange 400.

According to an embodiment of the present invention, as shown in fig. 3 and 6, the second truss structure 200 and the third truss structure 300 may also be split structures, the second truss structure 200 may include at least two second single-unit trusses 210 detachably connected to each other, and the third truss structure 300 may include at least two third single-unit trusses 310 detachably connected to each other.

According to an embodiment of the present invention, the first, second and third single-unit trusses 110, 210 and 310 may have similar structures, and hereinafter, the second single-unit truss 210 will be described as an example, but it should be understood that the description of the structure of the second single-unit truss 210 may be applied to the first and third single-unit trusses 110 and 310, except for the specific description. Also, the same reference numerals as those of the first flat frame, the splice bracket, the first baffle plate, and the second baffle plate in the first and third unit trusses 110 and 310 may be used for the components of the first flat frame, the splice bracket, the first baffle plate, and the second baffle plate in the second unit truss 210.

As shown in fig. 3 and 5, the second unit truss 210 may have a polyhedral frame structure. Although the second unit truss 210 illustrated in fig. 3 may have a hexahedral structure, the present invention is not limited thereto, and the second unit truss 210 may have a pentahedral structure, or other polyhedral frame structures other than the pentahedral structure or the hexahedral structure.

According to an embodiment of the present invention, the polyhedral frame structure may include a first planar frame 211 enclosing a portion of the second internal space 200 a. That is, the first plane frame 211 faces the second internal space 200a and forms a portion of the outer wall of the second internal space 200 a.

According to an embodiment of the present invention, the polyhedral frame structure may further include a second plane frame 212 parallel to the first plane frame 211 and spaced apart from the first plane frame 211 by a predetermined distance, and an upper plane frame 213a, a lower plane frame 213b and two side plane frames 214 connecting the first plane frame 211 and the second plane frame 212 to each other. The first and second plane frames 211 and 212 and the two side plane frames 214 may form a rectangular shape, and the upper and

lower plane frames

213a and 213b may form an isosceles trapezoid shape. However, the present invention is not limited thereto.

According to an embodiment of the present invention, as shown in fig. 5, the first planar frame 211 may include two vertical bars 211-1, an upper chord 211-2 connecting upper ends of the two vertical bars 211-1 to each other, a lower chord 211-3 connecting lower ends of the two vertical bars 211-1 to each other, and a web member 211-4 connecting diagonal lines of the first planar frame 211. In addition, the first planar frame 211 may further include a reinforcing bar 211-5 vertically disposed between the upper chord 211-2 and the lower chord 211-3, and an ear plate 219 may be disposed on the reinforcing bar 211-5 for supporting a platform disposed in the second internal space 200 a. However, the present invention is not limited thereto, and other reinforcing bars may be further provided on the first planar frame 211 according to the force analysis calculation.

According to an embodiment of the present invention, the second planar frame 212 and the first planar frame 211 may have a similar structure. The second planar frame 212 may have a smaller size than the first planar frame 211.

According to an embodiment of the present invention, the upper plane frame 213a, the lower plane frame 213b, and the two side plane frames 214 are used to connect the first plane frame 211 and the second plane frame 212 to each other at the upper, lower, and side portions. For example, the upper plane frame 213a, the lower plane frame 213b, and the two side plane frames 214 may include rods arranged to cross.

It will be appreciated that although the specific arrangement of uprights, chords and web members in the polyhedral truss structure is shown above, the invention is not so limited.

According to an embodiment of the present invention, the second unit truss 210 may include a splicing bracket 216, and the splicing bracket 216 may protrude from both sides of the first planar frame 211 for connecting the adjacent first planar frames 211 to each other.

As shown in fig. 5, the splice holder 216 can include a first splice holder 216a and a second splice holder 216b. The first splice bracket 216a may be disposed at one side of the first planar frame 211, and the second splice bracket 216b may be disposed at the other side of the first planar frame 211. The first and

second splice brackets

216a and 216b may protrude in a direction in which the side plane frame 214 extends, protruding by a predetermined length with respect to the first plane frame 211.

Specifically, the first splice brackets 216a may be provided on one upright 211-1 and may include two connecting rods arranged in parallel up and down, and alternatively, two sets of the first splice brackets 216a may be provided. A second splice bracket 216b can be provided on the other upright 211-1 and can include a connecting rod, and optionally, two sets of second splice brackets 216b can be provided. The first and

second splicing brackets

216a and 216b are provided with connecting holes at corresponding positions, and when the second individual trusses 210 are spliced, the second splicing bracket 216b of one second individual truss 210 may be inserted between the first splicing brackets 216a of the second individual truss 210 adjacent thereto, and bolts may be used to penetrate through the connecting holes of the first and

second splicing brackets

216a and 216b, thereby connecting the adjacent second individual trusses 210 to each other.

According to an embodiment of the present invention, the second single truss 210 may further include positioning bars 217 disposed at both sides of the first planar frame 211 and extending laterally. Specifically, the positioning rod 217 may protrude in a direction in which the side plane frame 214 extends. Positioning rods 217 may be provided at upper and lower ends of the two vertical bars 211-1 to position when the second unit trusses 210 are spliced to each other.

It should be understood that although a specific structure of the splice bracket 216 is described above, the structure of the splice bracket 216 is not limited thereto, and the second cell truss 210 may not include the splice bracket 216. For example, the uprights 211-1 of adjacent second cell trusses 210 can be directly connected without providing a splice bracket. According to the present invention, when the second cell girders 210 are connected to each other using the splice brackets 216, the volume of the second internal space 200a can be increased.

According to an embodiment of the present invention, it is understood that the splice bracket described above may not be included when the first truss structure 100 is a unitary structure as described above. Also, when the first truss structure 100 is a splicing structure and includes a splicing bracket, the splicing bracket should be disposed at a position avoiding the position of the tower door 121 (shown in fig. 2). Further, it should be understood that, as shown in fig. 2, when the first truss structure 100 is integrally connected with the fixing flange 400, the first truss structure 100 may not include the lower planar frame, and the lower portions of the first planar frame 211, the second planar frame 212, and the two side planar frames 214 of the first truss structure 100 may be directly welded to the fixing flange 400.

According to an embodiment of the present invention, the second mono-truss 210 may further include a first baffle 215 disposed on (e.g., welded to) the first planar frame 211, and further, each of the first truss structure 100, the second truss structure 200, and the third truss structure 300 may further include a second baffle 220 laid on the splice bracket 216 (as shown in fig. 3). The second barrier 220 may connect adjacent first planar frames 211 to each other, and the first barrier 215 and the second barrier 220 may collectively enclose the first internal space 100a, the second internal space 200a, and the third internal space 300a. It should be understood that first baffle 215 and second baffle 220 may employ a ventilated mesh baffle, or first baffle 215 and second baffle 220 may be omitted, depending on the particular geographic environment in which the tower is installed.

According to an embodiment of the present invention, the second unit truss 210 may further include coupling holes 218 provided on the upper chord 211-2 and the lower chord 211-3 of the first planar frame 211. The first planar frame 211 of the first unit truss 110 and the first planar frame 211 of the second unit truss 210 may be connected to each other by bolts penetrating the connection holes 218, thereby connecting the first unit truss 110 and the second unit truss 210 to each other. The first planar frame 211 of the second single-unit truss 210 and the first planar frame 211 of the third single-unit truss 310 may be connected to each other by bolts penetrating the connection holes 218, thereby connecting the second single-unit truss 210 and the third single-unit truss 310 to each other. In addition, when the first truss structure 100 is detachably installed with the fixing flange 400, the first plane frame 211 of the first truss structure 100 may also be fixed to the fixing flange 400 in a similar manner.

Hereinafter, the installation structure in the tower of the present invention will be described, however, it should be understood that the specific arrangement position of these installation structures may be changed as needed.

According to an embodiment of the present invention, as shown in fig. 2, the first truss structure 100 may include a first platform 140 provided in the first inner space 100a, a cable fixing cleat 150, a manhole 160 provided on the first barrier 215, a tower ladder 170, and a platform cover plate 180 provided near the tower ladder 170 to cover the ladder hole. The first platform 140 may be mounted on an ear plate (ear plate 219 shown in fig. 5) as described above. The first platform 140 may be an enclosed structure for a support platform of an elevator described below. Alternatively, the height of the first platform 140 may be lower than the height of the first single truss 110 to facilitate installation and fixation of the coupling bolts of the first and

second truss structures

100 and 200. The cable fixing jaw 150 may be provided on the second barrier 220 for arranging and fixing the cables, and the platform cover 180 is used to prevent objects or persons from falling down the ladder stand hole.

According to an embodiment of the present invention, as shown in fig. 3, the second truss structure 200 may include a second platform 240 provided in the second inner space 200a, a cable fixing cleat 250, a manhole 260 provided on the first baffle 215, a tower ladder 270, and a deck plate 280 provided near the tower ladder 270 to cover the ladder holes. The second platform 240 may be mounted on the ear plate described above (ear plate 219 shown in fig. 5). The second platform 240 has a hollow structure and has a lift hole 290, and the lift hole 290 can be used for installing a lift. A guard rail 290a may be disposed around the elevator shaft 290. A cable fixing clip 250 may be provided on the second barrier 220 for laying and fixing cables, and a platform cover 180 may be used to prevent objects or persons from falling through the ladder climbing holes.

According to an embodiment of the present invention, as shown in fig. 6 and 7, the third truss structure 300 may include a third platform 320, a fourth platform 330, a cable fixing cleat 350, a manhole 360 and a tower ladder 370 provided on the first barrier 215, which are provided in the third inner space 300a. The third platform 320 and the fourth platform 330 can be mounted on the ear plate described above (ear plate 219 shown in fig. 5). The third landing 320 may be a hollow structure having a lift hole 390, and the lift hole 390 may be used for installing a lift. A guard rail 390a may be provided around the elevator hole 390. The elevator may be supported on the first landing 140 and may pass through the second landing 240 and the third landing 320, but not the fourth landing 330. The fourth platform 330 may be disposed above the third platform 320 and may be a closed structure, so that various works may be performed on the fourth platform 330, and simultaneously, the lift holes of the other platforms may be isolated, thereby preventing a situation of falling through the lift holes when working in the cabin, and improving safety. A cable fixing clip 350 may be provided on the second barrier 220 for laying and fixing cables.

According to an embodiment of the present invention, the third truss structure 300 may further include an upper flange 380 disposed at a top end of the first planar frame 211 to connect the third truss structure 300 with the overhead nacelle. Specifically, the upper flange 380 may be disposed on the upper chord 211-2 of the first planar frame 211.

While the first truss structure 100, the second truss structure 200, and the third truss structure 300 have been described above, an example in which a manhole is opened in the first barrier 215 laid on the first plane frame 211, and a cable fixing clip and a ladder stand are provided at the second barrier 220 connected between the first barriers 215 has been described, but the present invention is not limited thereto, and the arrangement positions of the manhole, the cable fixing clip, and the ladder stand may be changed as needed.

According to another embodiment of the invention, a wind park comprising a tower as described above may be provided. Moreover, the tower according to the invention can be used for conventional direct-drive and double-feed wind generating sets, and also for novel vertical axis wind generating sets. According to the embodiments of the present invention, the following advantageous effects, not limited to, can be obtained.

1. The single trusses are mutually connected in the circumferential direction to form the trussed tower, the trussed tower can achieve the structural strength of a conventional steel tower or a steel-concrete structure, but the cost of required steel and the like is far less than that of the conventional wind generating set tower, the cost of unit kilowatts of the unit is effectively reduced, and the market competitiveness of the unit is improved.

2. At present, vortex-induced vibration needs to be prevented in the hoisting process of the high tower wind generating set, namely, a turbulence device (a turbulence block) is manually installed on the upper tower cylinder section according to the result of simulation calculation, the mode has unsatisfactory turbulence effect, the installation mode of the turbulence device is complicated, and the turbulence device is dismantled to have a plurality of defects such as certain safety risk. According to the tower disclosed by the invention, wind is allowed to pass through the tower, and meanwhile, the cross section of the spliced tower is of a polygonal structure, so that the wind blown from all directions can be dispersed, namely, the frequency of the wind is changed, the vortex-induced vibration is avoided, a turbulence device can be omitted, and the turbulence effect is improved. Meanwhile, compared with a conventional tower structure, in the dismantling process, a crane is not needed to be matched with a turbulence device installed in the high altitude, the operation safety risk is eliminated, and the dismantling cost is obviously reduced.

3. The tower frame is a truss type tower frame, so that wind can smoothly pass through the tower frame, the wind area is small, the tower frame is not easy to shake in the installation process, and the influence of external wind speed is small, so that the upper limit of the hoisting wind speed can be improved, and the hoisting window period is prolonged.

4. As the capacity of a unit increases gradually, better wind resources are required by increasing the hub height (i.e. tower height) and increasing the blade length (i.e. increasing the wind-swept area). At the moment, a tower structure with a larger diameter is needed to support all large parts of the fan with increased weight, so that the tower is easy to have the phenomena of superelevation, superwidth, overweight and the like in the transportation process, and great influence is brought to the transportation cost and the transportation period. The tower provided by the invention is formed by splicing the single trusses, so that the transportation efficiency of the single trusses is improved. Meanwhile, compared with a split steel tower frame, the truss type truss provided by the invention has the advantages of simplicity in assembly, high assembly efficiency and the like.

5. The development of a high tower wind generating set in a low wind speed area becomes a future development trend, the current high tower mainly adopts a steel-concrete structure (the bottom adopts concrete, and the upper part adopts a steel tower structure), slurry is adopted between each section of the steel-concrete structure for bonding and fixing, and a steel strand is adopted for tensioning and fixing the whole concrete tower barrel section. If the wind generating set needs to be dismantled, the concrete cylinder section is difficult to dismantle and high in dismantling cost, and the condition that the concrete tower cylinder is kept at the original machine position can occur, so that the external environment is damaged. Compared with the tower with a steel-concrete structure, the tower provided by the invention is easy to dismantle.

6. Each section of the second truss structure is basically identical to each section of the second truss structure in the vertical direction, so that the number of the second truss structures is increased or decreased according to towers with different heights, and the manufacturing method of the tower is very simple.

Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. A tower, characterized in that the tower comprises a first truss structure (100), the first truss structure (100) comprising at least two first mono-trusses (110), the at least two first mono-trusses (110) being connected end-to-end in the circumferential direction of the tower enclosing a closed structure having a first inner space (100 a),

wherein each of the first unit trusses (110) has a polyhedral frame structure including a first planar frame (211) enclosing a portion of the first inner space (100 a) and other planar frames connected to the first planar frame (211) and disposed outside the first inner space (100 a),

wherein the first unit truss (110) further comprises a splicing bracket (216), the splicing bracket (216) protruding from both sides of the first planar frame (211) for connecting the adjacent first planar frames (211) to each other.

2. The tower according to claim 1, further comprising a second truss structure (200), said second truss structure (200) being arranged at an upper end of said first truss structure (100) and being connected to said first truss structure (100), said second truss structure (200) enclosing a second inner space (200 a), said second inner space (200 a) being arranged coaxially with said first inner space (100 a).

3. Tower in accordance with claim 2, wherein the tower further comprises a third truss structure (300), the third truss structure (300) being arranged at the upper end of the second truss structure (200) and being connected to the second truss structure (200), the third truss structure (300) enclosing a third inner space (300 a), the third inner space (300 a) being arranged coaxially with the second inner space (200 a).

4. A tower according to claim 3, wherein said second truss structure (200) comprises at least two second individual trusses (210) connected end to end in said circumferential direction enclosing said second inner space (200 a), and said third truss structure (300) comprises at least two third individual trusses (310) connected end to end in said circumferential direction enclosing said third inner space (300 a).

5. The tower of claim 4, wherein the first, second and third cell trusses (110, 210, 310) are equal in number in a circumferential direction of the tower.

6. The tower of claim 4, wherein each of the second and third unit trusses (210) and (310) has a polyhedral frame structure, the polyhedral frame structure of the second unit truss (210) includes a first planar frame (211) enclosing the second internal space (200 a) and other planar frames connected to the first planar frame (211) and disposed outside the second internal space (200 a), and the polyhedral frame structure of the third unit truss (310) includes a first planar frame (211) enclosing the third internal space (300 a) and other planar frames connected to the first planar frame (211) and disposed outside the third internal space (300 a).

7. The tower according to claim 6, wherein the first truss structure (100), the second truss structure (200) and the third truss structure (300) are connected to each other by connecting vertically adjacent first planar frames (211) to each other.

8. The tower of claim 6, wherein each of the first, second, and third unitary trusses (110, 210, 310) further comprises a first baffle (215) laid on the first planar frame (211).

9. The tower of claim 8, wherein each of the second and third mono-trusses (210, 310) further comprises a splice bracket (216), the splice brackets (216) protruding from both sides of the first planar frame (211) for connecting adjacent first planar frames (211) to each other,

each of the first, second and third truss structures (100, 200, 300) further comprises a second baffle (220) connecting adjacent first planar frames (211) to each other, the second baffle (220) being disposed on the splice bracket (216).

10. Tower in accordance with one of the claims 5-9 wherein the number of the first single truss (110), the second single truss (210) and the third single truss (310) is three in the circumferential direction of the tower.

11. A tower according to any of claims 2-9, characterised in that it comprises a number of said second truss structures (200) connected to each other in the vertical direction.

12. Tower according to any of the claims 6-9, further comprising a fixation flange (400) arranged at the bottom of the first truss structure (100),

an upper flange (380) is provided at the top end of the first planar frame (211) of the third truss structure (300).

13. The tower of claim 9, wherein the splice bracket (216) comprises:

a first splice bracket (216 a) disposed at one side of the first planar frame (211);

a second splice bracket (216 b) provided at the other side of the first planar frame (211),

wherein the second splicing brackets (216 b) are interposed between the first splicing brackets (216 a) between the adjacent first planar frames (211) and fixed to the first splicing brackets (216 a).

14. The tower of claim 6 wherein each of the first, second, and third mono-truss (110, 210, 310) further comprises a positioning rod (217) disposed on either side of the first planar frame (211) and extending laterally.

15. The tower of any of claims 1-8, wherein the first truss structure (100) further comprises a second baffle (220) disposed between adjacent first cell trusses (110), wherein the second baffle (220) is welded on both sides to the adjacent first cell trusses (110), respectively, and wherein a tower door (121) is disposed on the second baffle (220).

16. A tower according to any one of claims 3-9, characterised in that the third truss structure (300) comprises a third platform (320) and a fourth platform (330) arranged in the third inner space (300 a), the fourth platform (330) being arranged above the third platform (320).

17. A wind park according to any of claims 1-16, wherein the wind park comprises a tower according to any of claims 1-16.