Plug-in type conversion section structure suitable for multi-stand-column truss type wind power tower

Abstract

The utility model discloses a plug-in type conversion section structure, and relates to the technical field of truss type wind power towers. The structure mainly solves the problems of force transmission and conversion between a traditional steel tower drum and a truss section, and particularly solves the problems that a traditional conversion section structure is insufficient in applicability to a high-power fan and high in transportation and installation cost. The structure comprises a steel tower barrel structure, a conical middle barrel, an upper inclined supporting rod, an upper connector, a lower inclined supporting rod, a lower connector and a supporting column connector. The top of the conical middle cylinder is connected with the steel tower cylinder structure through a top flange of the conical middle cylinder, and the bottom of the conical middle cylinder is connected with the truss section through a bottom flange of the strut connector. And all internal parts are connected through bolts for applying pre-tightening force. According to the structure, the steel casting is reasonably utilized, so that the transition between the steel tower drum and the truss section is effectively realized. And through a reasonable block design, modularization of production and convenience of transportation are realized. And meanwhile, the rigidity and the force transmission efficiency of the structure are improved by adopting an insertion type connection mode, and the high efficiency and the safety of overall force transmission of the truss type tower are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the wind generating set tower production technical field, concretely relates to a kind of conversion section structure suitable for multi-column truss type wind power tower. BACKGROUND

[0002] In recent years, wind power equipment technology continues to iterate and upgrade, with the continuous upgrading of single machine capacity and the optimization demand of wind energy capture efficiency, the tower structure faces higher standard mechanical performance requirements. Especially in the industry trend of large-scale development in low wind speed high wind shear area, the limitations of traditional cylinder steel tower and steel-concrete composite tower in structural rigidity and life cycle maintenance cost gradually appear, and it is urgent to develop truss tower scheme with better bearing performance and better economy. In such tower engineering design, the structural transition area (i.e. conversion section) between truss section and main tower cylinder becomes the key technical bottleneck affecting the overall mechanical transmission efficiency. Therefore, it is urgent to develop a conversion structure special for truss tower of large-power wind generating set to ensure the reliability and structural safety of tower system load transmission path. SUMMARY

[0003] The utility model aims at: aiming at the above problems, provide a kind of conversion section structure suitable for truss type wind power tower, to solve the connection problem of truss section and steel tower cylinder, and have stronger applicability to large megawatt, large impeller fan, realize the efficiency and safety of truss tower overall force transmission, simultaneously, reduce comprehensive cost through modularization processing and transportation.

[0004] The utility model aims to realize by the following technical scheme:

[0005] A kind of conversion section structure suitable for truss type wind power tower, including traditional steel tower cylinder structure, conical intermediate cylinder, upper inclined strut, upper connector, lower inclined strut, lower connector and strut connector.

[0006] Further, the steel tower cylinder structure includes steel tower cylinder body and T-shaped flange, the lower end of the steel tower cylinder body is welded with the T-shaped flange, and the T-shaped flange is connected with the top flange of the conical intermediate cylinder.

[0007] Further, the top of the conical intermediate cylinder is connected with the bottom of the traditional steel tower cylinder structure, the upper side surface is connected with the upper connector by fastener, and the lower side surface is connected with the lower connector by fastener.

[0008] Further, the upper part of the conical intermediate cylinder is cylindrical body, to improve the efficiency of structural force transmission, and the lower part is conical body, to reduce the amount of steel. The conical intermediate cylinder is provided with a reinforcing ring inside to improve local strength.

[0009] Further, the upper inclined support rod and the lower inclined support rod adopt a circular tube section, and the two ends are connected with the forged flanges through welding, serving as independent transportation units.

[0010] Further, the strut connector is composed of a circular tube section with the same outer diameter as the lower truss section column and three corbels, and the end of the corbel and the bottom of the circular tube are provided with flanges, and the strut connector is integrally cast or formed by welding.

[0011] Further, the bottom of the strut connector is connected with the top of the lower truss section column, and the end of the corbel is connected with two upper inclined support rods and one lower inclined support rod.

[0012] Further, each upper connector is connected with two upper inclined support rods, and each lower connector is connected with one lower inclined support rod.

[0013] Further, the thickness of the plate of the upper connector and the lower connector can be adjusted, and the shape of the connecting plate is adjusted according to the stress condition, so as to achieve the purpose of weight reduction.

[0014] Further, the strut connector is internally provided with a reinforcing component to improve the local strength.

[0015] As described above, due to the adoption of the technical scheme, the advantageous effects of the present application are as follows:

[0016] The plug-in conversion section structure of the truss type wind power tower provided by the present application efficiently connects the truss structure and the steel tower cylinder structure of the truss type tower, has stronger adaptability and bearing potential for the wind power tower with large limit load, and simultaneously splits different components to realize modular processing and form independent transportation units, which is beneficial to reduce the comprehensive cost of the truss type wind power tower, thereby improving the economy.

[0017] The foregoing main scheme and each further selection scheme of the present application can be freely combined to form multiple schemes, all of which are the schemes that can be adopted and claimed by the present application; and the selection between the present application (each non-conflict selection) and the selection between other selections can also be freely combined. Those skilled in the art can understand that there are multiple combinations according to the existing technology and common knowledge after understanding the present scheme, all of which are the technical schemes claimed by the present application, and therefore, the combinations are not listed here. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the side view of the structure of the present application.

[0019] Figure 2 is the front view of the structure of the present application.

[0020] Figure 3 is the side view of the steel tower cylinder structure of the present application.

[0021] Figure 4 is the axial side view of the conical middle cylinder structure of the utility model.

[0022] Figure 5 is the axial side view of the upper inclined strut structure of the utility model.

[0023] Figure 6 is the axial side view of the upper connector structure of the utility model.

[0024] Figure 7 is the axial side view of the lower inclined strut structure of the utility model.

[0025] Figure 8 is the axial side view of the lower connector structure of the utility model.

[0026] Figure 9 is the axial side view of the strut connector structure of the utility model.

[0027] In the figure: 100-steel tower cylinder structure, 200-conical middle cylinder, 300-upper inclined strut, 400-upper connector, 500-lower inclined strut, 600-lower connector, 700-strut connector; 101-T-shaped flange, 102-steel tower cylinder body, 103-steel tower cylinder weld; 201-bolt hole for upper inclined strut, 202-bolt hole for lower inclined strut, 203-cylindrical body, 204-conical body, 205-strengthening ring, 206-middle cylinder T-shaped flange; 301-upper inclined strut body, 302-upper inclined strut and middle cylinder connecting flange, 303-upper inclined strut and strut connector connecting flange; 401-upper connector end plate, 402-upper connector body, 403-upper connector flange; 501-lower inclined strut body, 502-lower inclined strut and middle cylinder connecting flange, 503-lower inclined strut and strut connector connecting flange; 601-lower connector end plate, 602-lower connector body, 603-lower connector flange; 701-vertical rod, 702-bottom flange, 703-lower corbel, 704-upper corbel, 705-lower corbel flange, 706-upper corbel flange, 707-top sealing plate. DETAILED DESCRIPTION

[0028] The utility model will be further explained in connection with specific embodiments and the drawings.

[0029] Reference Figure 1 As shown in the figure, an insertion type conversion section structure suitable for truss type wind power tower, including steel tower cylinder structure 100, conical middle cylinder 200, upper inclined strut 300, upper connector 400, lower inclined strut 500, lower connector 600, strut connector 700.

[0030] The steel tower structure 100 is connected with the upper end of the conical intermediate cylinder 200 by fasteners, the upper side of the conical intermediate cylinder 200 is connected with a plurality of upper connectors 400 by fasteners, and the lower side of the conical intermediate cylinder 200 is connected with a plurality of lower connectors 600 by fasteners. Each upper connector 400 is connected with two upper inclined bracing bars 300 by fasteners, and each lower connector 600 is connected with one lower inclined bracing bar 500 by fasteners. The bottom of the support connector 700 is connected with the lower truss segment column by fasteners, and the side of each support connector 700 is connected with two upper inclined bracing bars 300 and one lower inclined bracing bar 500 by fasteners, respectively. The fasteners above include but are not limited to bolt connection and rivet connection.

[0031] Referring to Figure 2 As shown, the steel tower structure 100 is inserted into the conversion section, the lowest point of the steel tower structure 100 is connected with one end of the lower inclined bracing bar 500 through the lower connector 600, and the included angle between the lower inclined bracing bar 500 and the horizontal plane should be between -15° and +30°, and the included angle between the upper inclined bracing bar 300 and the horizontal plane should be between 40° and 60°.

[0032] Referring to Figure 3 As shown, the steel tower structure 100 includes a T-shaped flange 101, a tower cylinder body 102, and a steel tower cylinder weld 103. The lower end of the tower cylinder body 102 is welded and fixed to the T-shaped flange 101, bolt holes are provided at the T-shaped flange 101, the T-shaped flange 101 is connected with the intermediate body T-shaped flange 206 by fasteners. The upper end of the tower cylinder body 102 is connected with the upper steel tower cylinder through the steel tower cylinder weld 103.

[0033] Referring to Figure 4 As shown, the conical intermediate cylinder 200 is a reverse conical structure, including an upper inclined bracing bar bolt hole 201, a lower inclined bracing bar bolt hole 202, a cylindrical body 203, a conical body 204, a reinforcing ring 205, and an intermediate cylinder T-shaped flange 206. The cylindrical body 203, the conical body 204, and the reinforcing ring 205 are integrally connected by welding, and the intermediate cylinder T-shaped flange 206 is forged and then welded with the remaining parts.

[0034] The reinforcing ring 205 is arranged at positions including but not limited to a diameter change region and a region requiring local reinforcement.

[0035] Referring to Figure 5 As shown, the upper inclined bracing bar 300 is a round pipe or a rectangular pipe, including an upper inclined bracing bar body 301, an upper inclined bracing bar and intermediate cylinder connecting flange 302, and an upper inclined bracing bar and support connector connecting flange 303.

[0036] The upper inclined bracing bar and intermediate cylinder connecting flange 302 and the upper inclined bracing bar and support connector connecting flange 303 are forged flanges, which are welded with the upper inclined bracing bar body 301.

[0037] The upper inclined strut and the intermediate cylinder connecting flange 302 are connected by bolts, and the upper inclined strut and the support column connector connecting flange 303 are connected to the upper bracket flange 706 by bolts.

[0038] Referring to Figure 6 As shown, the upper connector 400 includes an upper connector end plate 401, an upper connector rod body 402, and an upper connector flange 403. The upper connector 400 can be formed by casting or assembled by welding.

[0039] The outer contour of the upper connector end plate 401 is approximately a chamfered triangle, which is determined according to lofting. The upper connector end plate 401 is connected to the upper inclined strut bolt hole 201 through fasteners, and the upper connector flange 403 is connected to the upper inclined strut and the intermediate cylinder connecting flange 302 through fasteners. If a bolt fastener is used, the bolt needs to be pre-tightened to avoid loosening during use.

[0040] Referring to Figure 7 As shown, the lower inclined strut 500 is a circular tube or a rectangular tube, which includes a lower inclined strut rod body 501, a lower inclined strut and intermediate cylinder connecting flange 502, and a lower inclined strut and support column connector connecting flange 503.

[0041] The lower inclined strut and the intermediate cylinder connecting flange 502 and the lower inclined strut and the support column connector connecting flange 503 are forged flanges, which are welded to the lower inclined strut rod body 501.

[0042] The lower inclined strut and the intermediate cylinder connecting flange 502 are connected to the lower connector flange 503 by bolts, and the lower inclined strut and the support column connector connecting flange 503 are connected to the lower bracket flange 705 by bolts.

[0043] Referring to Figure 8 As shown, the lower connector 600 includes a lower connector end plate 601, a lower connector rod body 602, and a lower connector flange 603. The lower connector 600 can be formed by casting or assembled by welding.

[0044] The outer contour of the lower connector end plate 601 is approximately circular, which is determined according to lofting. The lower connector end plate 601 is connected to the lower inclined strut bolt hole 202 through fasteners, and the lower connector flange 603 is connected to the lower inclined strut and the intermediate cylinder connecting flange 502 through fasteners. If a bolt fastener is used, the bolt needs to be pre-tightened to avoid loosening during use.

[0045] Referring to Figure 9 As shown, the support column connector 700 includes a vertical rod 701, a bottom flange 702, a lower bracket 703, an upper bracket 704, a lower bracket flange 705, an upper bracket flange 706, and a top sealing plate 707. The support column connector 700 can be formed by casting or assembled by welding.

[0046] The vertical rod 701 adopts the same outer diameter as the truss section vertical rod; the bottom flange 702 is connected with the truss section vertical rod through fasteners; the welds of the lower bracket 703 and the upper bracket 704 should avoid overlapping, and if overlapping, a stiffening rib needs to be added; the top sealing plate 707 functions to prevent rainwater from entering the internal rod member, causing corrosion and affecting durability.

[0047] The plug-in conversion section structure can efficiently connect the truss section and the steel tower cylinder section of the truss tower to realize effective force transmission. In specific design, different components are modularly split, and the connection nodes adopt standardized module design, which can effectively reduce transportation cost, realize modular processing and independent transportation unit, and reduce structural cost in the process of large-scale production.

Claims

1. A plug-in transition segment structure suitable for a lattice wind power tower, characterized in that, The application relates to a steel tower structure, which comprises a steel tower cylinder structure (100), a conical intermediate cylinder (200), upper inclined support rods (300), upper connectors (400), lower inclined support rods (500), lower connectors (600) and support column connectors (700). The conical intermediate cylinder (200) is in an inverted conical structure and comprises a cylindrical cylinder body (203), a conical cylinder body (204), a reinforcing ring (205) and an intermediate cylinder T-shaped flange (206); the cylindrical cylinder body (203), the conical cylinder body (204) and the reinforcing ring (205) are welded together, and the intermediate cylinder T-shaped flange (206) is forged and welded with the rest.

2. The plug-in transition section structure according to claim 1, characterized by: The reinforcing ring (205) is arranged at a diameter changing area or a local reinforcing area of the conical intermediate cylinder (200).

3. The plug-in transition section structure according to claim 2, characterized in that: The upper inclined support rods (300) and the lower inclined support rods (500) are circular pipes or rectangular pipes, the ends of which are respectively provided with forged flanges (302, 303, 502, 503) and are connected with rod bodies (301, 501) through welding; the upper inclined support rods (300) form an angle of 40-60 degrees with a horizontal plane, and the lower inclined support rods (500) form an angle of -15-+30 degrees with the horizontal plane.

4. The plug-in transition section structure according to claim 1, characterized by: The upper connectors (400) and the lower connectors (600) respectively comprise end plates (401, 601), rod bodies (402, 602) and flanges (403, 603); the end plates (401, 601) are inversely-chamfered triangular or circular in outer contour and are connected with bolt holes (201, 202) of the conical intermediate cylinder (200) through fasteners; the flanges (403, 603) are connected with flanges (302, 502) of the upper inclined support rods (300) or the lower inclined support rods (500) through pre-tightening bolts.

5. The plug-in transition section structure according to claim 1, characterized by: The support column connectors (700) comprise vertical rods (701), bottom flanges (702), lower corbels (703), upper corbels (704) and top sealing plates (707); the vertical rods (701) are matched with vertical rods of truss sections in outer diameter, and the top sealing plates (707) cover top ends of the vertical rods (701) to prevent rainwater from entering.

6. The plug-in transition section structure according to claim 1, characterized by: Welding seam positions of the lower corbels (703) and the upper corbels (704) are staggered, and if there are overlapping areas of welding seams, reinforcing ribs are arranged for reinforcement.

7. The plug-in transition section structure according to claim 6, characterized in that: ​ 8. The plug-in transition section structure according to claim 1, characterized by: The steel tower structure (100) comprises a T-shaped flange (101), a tower drum barrel (102) and a steel tower drum weld (103), the lower end of the tower drum barrel (102) is welded to the T-shaped flange (101), and the tower drum barrel (102) is connected to the intermediate drum T-shaped flange (206) through bolts.

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