Plug-in type conversion section structure for truss type wind power tower

Abstract

The utility model discloses a plug-in type conversion section structure suitable for a truss type wind power tower. The plug-in type conversion section structure mainly solves the problems of force transmission and conversion between a traditional steel tower drum and a truss section. The structure comprises a steel tower drum structure, a variable-diameter middle body, an upper inclined rod, a lower inclined rod, an annular transverse rod and corner columns. The top is connected with a steel tower tube structure through a variable-diameter intermediate top flange, and the bottom is connected with a truss section through a corner post bottom flange; and all internal parts are connected through bolts for applying pre-tightening force. Therefore, the problem of transition between the steel tower drum and the truss section is solved. Through reasonable partitioning, modularization and transportation convenience are achieved; through body type optimization and stiffening rib arrangement, the structural rigidity and the force transfer efficiency are improved, and the overall force transfer efficiency and safety of the truss type tower are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the production technical field of wind turbine tower, specifically relates to a conversion section structure suitable for truss type wind power tower. BACKGROUND

[0002] The current wind power tower development enters the rapid development period, higher hub height, larger impeller diameter, larger power generation capacity all put forward higher and higher requirements to the bearing capacity and height of the tower. With the utilization rate of low wind speed high shear region wind resources being higher and higher, the traditional steel tower and the relatively economical better steel concrete tower can not meet the growing demand of power generation, and the truss type tower with greater rigidity and lower maintenance cost is needed. A key problem in the design and manufacture process of the truss type tower is the transition problem between the truss section and the steel tower, that is, the commonly known "conversion section". Therefore, a new truss tower conversion structure suitable for the current development situation of Chinese wind power is needed to be designed to realize the efficiency and safety of the overall force transmission of the truss type tower. SUMMARY

[0003] The utility model discloses a kind of conversion section structures of insertion type suitable for truss type wind power tower, solve the connection problem of the truss section of truss tower and steel tower, to realize the efficiency and safety of the overall force transmission of the truss type tower.

[0004] The utility model discloses a kind of conversion section structures of insertion type suitable for truss type wind power tower, solve the connection problem of the truss section of truss tower and steel tower, to realize the efficiency and safety of the overall force transmission of the truss type tower.

[0005] A kind of conversion section structures of insertion type suitable for truss type wind power tower, including traditional steel tower structure, variable diameter intermediate body, upper inclined rod, lower inclined rod, annular cross bar and angle column.

[0006] Further, the upper portion of the variable diameter intermediate body is connected to the bottom of the traditional steel tower structure, the middle portion is connected to the side surface of the upper inclined rod, and the lower portion is connected to the side surface of the lower inclined rod.

[0007] Further, the steel tower structure includes a tower cylinder and an upper T flange, and the lower end of the tower cylinder is fixed to the flange, and the flange is connected to the top flange of the conversion section structure.

[0008] Further, the upper portion of the variable diameter intermediate body is a large-diameter cylindrical shell, the middle portion is a conical shell, and the lower portion is a small-diameter cylindrical shell. The wall thickness of the large-diameter cylindrical shell is the same as that of the steel tower structure, and the wall thickness decreases in the order of the conical shell, the small-diameter cylindrical shell.

[0009] Further, the variable diameter intermediate body is provided with a reinforcing ring inside.

[0010] Further, the upper inclined rod adopts a variable cross-section rectangular tube section, and a stiffening rib is arranged inside, the larger rectangular tube section is connected to the outer side of the upper larger diameter cylindrical shell of the variable diameter intermediate body, and the smaller rectangular tube section is connected to the top of the corner column.

[0011] Further, the lower inclined rod adopts a circular tube section, and is connected to the outer side of the lower smaller diameter cylindrical shell of the variable diameter intermediate body.

[0012] Further, the ring-shaped transverse rod adopts a circular tube section, and is used to connect any two adjacent corner columns.

[0013] Further, the corner column adopts a circular tube section with the same outer diameter as the lower truss section support column, the upper part of the corner column is connected to the lower part of the upper inclined support rod with a variable cross-section rectangular tube shape, the side surface is connected to the lower inclined rod and the ring-shaped transverse rod, and the bottom is connected to the top of the lower truss section support column.

[0014] Further, an L-shaped flange is arranged at the top of the lower truss section support column, and the flange at the bottom of the corner column is connected to the flange at the top of the lower truss section support column.

[0015] As described above, due to the adoption of the above technical scheme, the novel truss type wind power tower has the following beneficial effects:

[0016] The plug-in conversion section structure of the truss type wind power tower has high efficiency in connecting the truss structure and the steel tower cylinder structure of the truss type tower, has strong adaptability to high towers and high-power wind power generator towers, realizes the efficiency and safety of force transmission of the truss type tower connection, and has economic benefits.

[0017] The foregoing main scheme and each further selection scheme of the utility model can be freely combined to form multiple schemes, and each scheme is a scheme that can be adopted and claimed by the utility model; and the utility model can also be freely combined between each non-conflict selection and other selections. A person skilled in the art can understand that there are multiple combinations according to the prior art and common knowledge after understanding the scheme, and each combination is a technical scheme claimed by the utility model, and is not listed exhaustively. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the side view of the structure of the utility model.

[0019] Figure 2 is the front view of the structure of the utility model.

[0020] Figure 3 is the side view of the steel tower cylinder structure of the utility model.

[0021] Figure 4 is the side view of the intermediate body structure of the utility model.

[0022] Figure 5 is the side view of the upper inclined rod and corner column structure of the utility model.

[0023] Figure 6 is the shaft side view of the lower inclined rod structure of the utility model.

[0024] Figure 7 is the shaft side view of the ring cross rod structure of the utility model.

[0025] In the drawing: 100-steel tower structure, 200-variable diameter intermediate body, 300-upper inclined rod, 400-lower inclined rod, 500-ring cross rod, 600-corner column; 101-upper T flange, 102-steel tower cylinder, 103-steel tower weld; 201-bolt hole for upper inclined rod, 202-bolt hole for lower inclined rod, 203-upper circular shell, 204-middle conical shell, 205-lower circular shell, 206-strengthening ring, 207-middle T flange; 301-upper connecting plate, 302-upper inclined rod top plate, 303-upper inclined rod side plate, 304-upper inclined rod bottom plate, 305-longitudinal stiffening rib, 306-weight reduction hole, 307-lower inclined rod flange, 308-ring cross rod flange, 309-end sealing plate, 310-transverse stiffening rib, 311-corbel; 401-lower first connecting plate, 402-lower inclined rod body, 403-lower second connecting plate; 501-ring connecting plate, 502-ring cross rod body. DETAILED DESCRIPTION

[0026] The utility model will be further explained in connection with specific embodiments and drawings.

[0027] Reference Figure 1 As shown in the figure, an insertion type conversion section structure suitable for truss type wind power tower, including steel tower structure 100, variable diameter intermediate body 200, upper inclined rod 300, lower inclined rod 400, ring cross rod 500 and corner column 600.

[0028] The steel tower structure 100 is connected with the upper end of the variable diameter intermediate body 200 through fasteners, the middle part side of the variable diameter intermediate body 200 is connected with the inner end of a plurality of upper inclined rods 300 through fasteners, and the lower part side of the variable diameter intermediate body 200 is connected with the inner end of a plurality of lower inclined rods 400 through fasteners. The outer end of the upper inclined rod 300 is welded with the corner column 600. The outer end of the lower inclined rod 400, the end of the ring cross rod 500 and the outer extension flange plate of the corner column 600 are connected through fasteners.

[0029] Reference Figure 2 As shown in the figure, the variable diameter intermediate body 200 is inserted into the conversion section as the vertical extension section of the steel tower structure 100, and the lowest point is located at the end of the lower inclined rod 400 close to the variable diameter intermediate body 200. The lowest point should be higher than the plane where the ring cross rod 500 is located, that is, the lower inclined rod 400 should be kept inclined upward, and the included angle between the lower inclined rod 400 and the horizontal plane is between 5° and 30°. The included angle between the upper inclined rod 300 and the horizontal plane is between 35° and 60°.

[0030] Both the upper diagonal 300 and the lower diagonal 400 should be connected with the cylindrical shell position of the variable diameter intermediate body 200 through fasteners.

[0031] Referring to Figure 3 As shown, the steel tower structure 100 includes an upper T flange 101, a tower cylinder 102 and a steel tower weld 103. The lower end of the tower cylinder 102 is welded and fixed to the upper T flange 101, bolt holes are opened at the upper T flange 101, and the upper T flange 101 is connected with the middle T flange 207 through fasteners. The upper end of the tower cylinder 102 is connected with the upper steel tower through the steel tower weld 103.

[0032] Referring to Figure 4 As shown, the variable diameter intermediate body 200 is a reverse conical structure, including an upper diagonal bolt hole 201, a lower diagonal bolt hole 202, an upper cylindrical shell 203, a middle conical shell 204, a lower cylindrical shell 205, a reinforcing ring 206 and a middle T flange 207. The upper cylindrical shell 203, the middle conical shell 204, the lower cylindrical shell 205 and the reinforcing ring 206 are integrally connected through welding after being opened in the holes, and the middle T flange 207 is forged into shape and welded with the remaining parts.

[0033] The reinforcing ring 206 position should avoid the bolt hole position, and sufficient bolt installation space should be reserved. The reinforcing ring 206 setting position includes but is not limited to the variable diameter section, the local stress larger position and the like.

[0034] Referring to Figure 5 As shown, the upper diagonal 300 is a variable cross-section rectangular steel pipe, and the corner column 600 is a circular pipe section with the same outer diameter as the lower truss section support. The upper diagonal 300 is connected with the corner column 600 through welding.

[0035] The upper diagonal 300 includes an upper connecting plate 301, an upper diagonal top plate 302, an upper diagonal side plate 303, an upper diagonal bottom plate 304, a longitudinal stiffening rib 305, a weight reduction hole 306, an end sealing plate 309 and a transverse stiffening rib 310.

[0036] The upper connecting plate 301 is connected with the upper diagonal bolt hole 201 through bolts, and the bolts need to be pre-tightened to avoid relaxation during use.

[0037] The upper inclined rod top plate 302, the upper inclined rod side plate 303, the upper inclined rod bottom plate 304, the longitudinal stiffening rib 305, the end sealing plate 309 and the transverse stiffening rib 310 are connected by welding, wherein the upper inclined rod top plate 302, the upper inclined rod side plate 303 and the upper inclined rod bottom plate 304 are welded to form a variable cross-section rectangular tube, which is divided into three cavities by the longitudinal stiffening rib 305, and the longitudinal stiffening rib 305 is welded to the upper inclined rod top plate 302 and the upper inclined rod bottom plate 304. The end sealing plate 309 is located at the end of the upper inclined rod 300 and is welded to the upper inclined rod top plate 302, the upper inclined rod side plate 303 and the upper inclined rod bottom plate 304. The transverse stiffening rib 310 is located at the corresponding position of the corner column 600 and is welded to the upper inclined rod top plate 302, the upper inclined rod side plate 303, the upper inclined rod bottom plate 304 and the longitudinal stiffening rib 305. The upper connecting plate 301 is provided with a weight-reducing hole 306.

[0038] The corner column 600 includes a lower inclined rod flange 307, a ring-shaped transverse rod flange 308 and three brackets 311. The side of the corner column is welded to the three brackets 311, the three brackets 311 are welded to the lower inclined rod flange 307 and the ring-shaped transverse rod flange 308 respectively, and the lower inclined rod flange 307 and the ring-shaped transverse rod flange 308 are forged.

[0039] The lower inclined rod flange 307 is bolted to the lower second connecting plate 403.

[0040] The ring-shaped transverse rod flange 308 is bolted to the ring connecting plate 501.

[0041] Reference Figure 6 As shown, the lower inclined rod 400 includes a lower first connecting plate 401, a lower inclined rod body 402 and a lower second connecting plate 403.

[0042] The lower first connecting plate 401 is bolted to the lower inclined rod bolt hole 202. The lower second connecting plate 403 is bolted to the lower inclined rod flange 307. The two ends of the lower inclined rod body 402 are welded to the lower first connecting plate 401 and the lower second connecting plate 403.

[0043] Reference Figure 7 As shown, the ring-shaped transverse rod 500 includes a ring connecting plate 501 and a ring-shaped transverse rod body 502, wherein the ring-shaped transverse rod body 502 is welded to the ring connecting plate 501 at both ends; the ring connecting plate 501 is bolted to the ring-shaped transverse rod flange 308, and the ring-shaped transverse rod body 502 is welded to the ring connecting plate 501.

[0044] The insertion type conversion section structure can efficiently connect the truss section and the steel tower section of the truss type tower, realizes the efficiency and safety of the connection force transmission of the truss type tower, and has economic benefits. In specific design, the connection part is designed in a split type structure, and the connection node is designed in a standardized module, so that the transportation cost can be effectively reduced, and the structural cost can be reduced in the process of large-scale production.

Claims

1. An insertable transfer section structure for truss-type wind turbine towers, characterized in that, include: The structure comprises a steel tower (100), a variable-diameter intermediate body (200), an upper inclined rod (300), a lower inclined rod (400), a circumferential crossbar (500), and corner posts (600). The steel tower (100) is connected to the upper end of the variable-diameter intermediate body (200) by fasteners. The inner ends of several upper inclined rods (300) are connected to the middle side of the variable-diameter intermediate body (200) by fasteners. The lower side of the variable-diameter intermediate body (200) is also connected to the inner end of the lower inclined rods (300). The inner ends of several lower inclined rods (400) are connected by fasteners; the outer end of the upper inclined rod (300) is welded to the corner post (600); the outer end of the lower inclined rod (400) and the end of the circumferential crossbar (500) are respectively connected to the outer flange of the corner post (600) by fasteners; the lowest point of the variable diameter intermediate body (200) is higher than the plane where the circumferential crossbar (500) is located, and the lower inclined rod (400) remains inclined upward.

2. The insert-type transition segment structure according to claim 1, characterized in that: The variable diameter intermediate body (200) is an inverted conical structure, comprising an upper circular shell (203), a middle conical shell (204), a lower circular shell (205), and a reinforcing ring (206) that are welded together in sequence; the upper circular shell (203) and the lower circular shell (205) are respectively provided with bolt holes (201) for the upper inclined rod and bolt holes (202) for the lower inclined rod; the top of the variable diameter intermediate body (200) is connected to the upper T-flange (101) of the steel tower structure (100) through the middle T-flange (207).

3. The insert-type transition segment structure according to claim 1, characterized in that: The upper inclined rod (300) is a variable cross-section rectangular steel tube, and its end is provided with an upper connecting plate (301). The upper connecting plate (301) is connected to the upper inclined rod of the variable diameter intermediate body (200) by bolts through bolt holes (201). The upper inclined rod (300) is provided with longitudinal stiffening ribs (305) along the longitudinal direction inside, which divides the upper inclined rod (300) into multiple cavities. The longitudinal stiffening ribs (305) are welded to the top plate (302) and the bottom plate (304) of the upper inclined rod. The upper connecting plate (301) is provided with weight reduction holes (306).

4. The insert-type transition section structure according to claim 2, characterized in that: The lower inclined rod (400) includes a lower connecting plate (401), a lower inclined rod body (402), and a lower second connecting plate (403); the lower connecting plate (401) is connected to the lower inclined rod of the variable diameter intermediate body (200) by bolts through bolt holes (202); the lower second connecting plate (403) is connected to the lower inclined rod flange (307) of the corner column (600) by bolts.

5. The insert-type transition section structure according to claim 1, characterized in that: The corner post (600) has a circular tube cross section and three brackets (311) are welded to its side. Each bracket (311) is welded to the lower diagonal flange (307) or the circumferential crossbar flange (308). The circumferential crossbar (500) is bolted to the circumferential crossbar flange (308) through the ring connecting plate (501) at its end.

6. The insert-type transition segment structure according to claim 2, characterized in that: The reinforcing ring (206) is disposed in the variable diameter section of the variable diameter intermediate body (200).

7. The insert-type transition segment structure according to claim 2, 3 or 4, characterized in that: Preload is applied to the connecting bolts between the upper T-flange (101) and the middle T-flange (207) of the steel tower structure (100), between the upper connecting plate (301) and the bolt hole (201) of the upper inclined rod, and between the lower connecting plate (401) and the bolt hole (202) of the lower inclined rod.

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