Bolting assembly type hollow interlayer concrete-filled steel tube wind power tower tube

Abstract

The utility model relates to the technical field of wind power generation equipment, and discloses a bolting assembly type hollow interlayer concrete filled steel tube wind power tower drum which comprises a plurality of tower drum prefabricated sections which are connected in sequence, and a plurality of limiting blocks are evenly distributed on the end faces of the top ends of the tower drum prefabricated sections. Limiting bolt mounting holes and double-end bent bolt mounting holes are formed between the limiting blocks at intervals, limiting grooves matched with the limiting blocks of the next tower tube prefabricated section are formed in the end face of the bottom end of the tower tube prefabricated section, limiting bolts and double-end bent bolt mounting holes are formed between the limiting grooves at intervals, and the limiting bolts are matched with the limiting bolt mounting holes. Every two adjacent tower drum prefabricated sections are connected through a double-end bent bolt.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power generation equipment technical field, concretely is a kind of bolted assembly type hollow sandwich steel pipe concrete wind power tower cylinder. BACKGROUND

[0002] Under the background of profound change in energy pattern in China, accelerating the transformation to green and low carbon, renewable clean energy generation has become the core layout direction of future energy development strategy planning in China. Traditional wind turbine has certain limitations in wind resource utilization efficiency and stability, and low air wind instability, low energy density and other problems restrict its efficiency. Compared with the traditional wind turbine, the super-high wind power tower can break through these bottlenecks and capture stronger and more stable wind energy, thereby greatly improving the power generation efficiency. Especially in complex terrain and severe weather conditions, the super-high wind power tower shows more excellent adaptability and stability. However, due to the restriction of material properties and structural design and other factors, the height of traditional wind power tower cylinder is difficult to improve. Therefore, it is urgent to develop a new type of tower cylinder structure to meet the demand of super-high wind power tower cylinder for structural stiffness and vibration control. SUMMARY

[0003] The utility model discloses to solve the series problems that current traditional wind power tower cylinder is difficult to improve height, cannot break through the limitation of traditional wind turbine in wind resource utilization efficiency and stability, and the demand of super-high wind power tower cylinder for structural stiffness and vibration control is increasingly provided with a bolted assembly type hollow sandwich steel pipe concrete wind power tower cylinder.

[0004] The utility model provides a bolted assembly type hollow sandwich steel pipe concrete wind power tower cylinder, including a plurality of section connection tower cylinder prefabricated segment, the top end surface of tower cylinder prefabricated segment is evenly arranged with a plurality of limit blocks, and limit bolt mounting hole and double -end curved bolt mounting hole are arranged at interval between limit blocks, the bottom end surface of tower cylinder prefabricated segment is equipped with the limit slot of cooperation with the limit block of next tower cylinder prefabricated segment, and limit bolt and double -end curved bolt mounting hole are arranged at interval between limit slot, limit bolt is matched with limit bolt mounting hole, and two tower cylinder prefabricated segments are connected through double -end curved bolt.

[0005] In implementation, the prefabricated segment of the tower cylinder includes a cylinder body filled with a concrete filling layer, and the outer diameter of the cylinder body is less than or equal to 4.5 m to meet the transportation requirements of the road. The cylinder body includes an inner cylinder wall, an outer cylinder wall, and a concrete filling layer sandwiched between the inner cylinder wall and the outer cylinder wall, which fully utilizes the interaction between steel and concrete to effectively enhance the stiffness of the tower cylinder structure and reduce the vibration of the wind power tower cylinder. The concrete filling layer can be made of ordinary concrete, recycled concrete, and high-strength concrete according to the strength requirements of the tower cylinder structure. The type and amount of cement-based expansive agent need to be adjusted according to the design requirements. The upper and lower adapter flanges are welded to the end faces of the cylinder body. A plurality of limiting blocks are uniformly arranged on the top end face of the prefabricated segment of the tower cylinder. Limiting bolt mounting holes and double-end bent bolt mounting holes are arranged between the limiting blocks. A limiting groove is arranged on the bottom end face of the prefabricated segment of the tower cylinder to cooperate with the limiting blocks of the next prefabricated segment of the tower cylinder. Limiting bolts and double-end bent bolt mounting holes are arranged between the limiting grooves. The limiting bolt is matched with the limiting bolt mounting hole. Further, a limiting bolt mounting cavity is arranged in the upper end of the cylinder body within the concrete filling layer and is opposite to and communicates with the limiting bolt mounting hole. The limiting bolt penetrates the limiting bolt mounting hole and is assembled in the limiting bolt mounting cavity.

[0006] The two adjacent prefabricated segments of the tower cylinder are connected by the double-end bent bolts. Specifically, the upper and lower ends of the concrete filling layer are respectively provided with bent bolt mounting cavities. One end of the bent bolt mounting cavity is welded to the inner cylinder wall and penetrates the inner cylinder wall. The other end communicates with the double-end bent bolt mounting hole. Each double-end bent bolt mounting hole corresponds to a bent bolt mounting cavity. The upper adapter flange and the lower adapter flange of the two adjacent prefabricated segments of the tower cylinder are connected by the double-end bent bolts assembled in the double-end bent bolt mounting holes and the bent bolt mounting cavities and are in contact. The two ends of the double-end bent bolt protrude out of the inner wall of the prefabricated segment of the tower cylinder and are fixed by nuts.

[0007] In use, the prefabricated segments of the tower cylinder are prefabricated in the factory. The bolted assembled hollow sandwiched steel pipe concrete wind power tower cylinder is sequentially spliced from bottom to top by a plurality of prefabricated segments of the tower cylinder. On site, only the longitudinal splicing by hoisting and the connection by the double-end bent bolts with nuts are needed.

[0008] The prefabrication process of the prefabricated segment of the tower cylinder is as follows:

[0009] a, horizontally place the upper adapter flange and the lower adapter flange, polish the surface to meet the welding requirements in terms of flatness, roughness, and cleanliness, and perform beveling on the adapter flange according to the welding process to ensure the welding quality and connection performance.

[0010] b, the edge of the limiting bolt is welded and fixed with the reserved hole position of the lower adapter flange, to ensure that the limiting bolt corresponds to the limiting bolt mounting hole provided on the upper adapter flange.

[0011] c, the inner cylinder wall and the outer cylinder wall are fixed on the operation platform by using a special clamp or positioning device to ensure the concentricity, the lower adapter flange is assembled below the clamp or positioning device, the position is adjusted to ensure the coaxiality of the lower adapter flange and the inner cylinder wall and the outer cylinder wall, the lower edge of the lower adapter flange is welded and fixed with the inner cylinder wall and the outer cylinder wall, and the accurate connection of the cylinder body and the lower adapter flange is realized.

[0012] d, the bent bolt mounting cavity of the lower end of the cylinder body is welded and fixed between the double-head bent bolt mounting hole of the lower adapter flange and the reserved hole position of the inner cylinder wall, and the assembly of the lower end of the cylinder body and the lower adapter flange is completed.

[0013] e, the bent bolt mounting cavity and the limiting bolt mounting cavity of the upper end of the cylinder body are fixed using temporary supports at the opening of the upper end of the cylinder body, to avoid displacement of the embedded parts during construction and to ensure the accuracy and structural stability of subsequent construction.

[0014] f, the two ends of the limiting bolt mounting cavity and the bent bolt mounting cavity of the upper end of the cylinder body are blocked to prevent concrete material from entering during the grouting process; the concrete filling layer is formed by pouring from the opening of the upper end of the cylinder body, to ensure the filling effect of the structure inside.

[0015] g, the concrete filling layer is maintained, the temporary supports are removed, the bent bolt mounting cavity and the limiting bolt mounting cavity of the upper end of the cylinder body are accurately connected with the reserved hole and the limiting bolt mounting hole of the upper adapter flange respectively, the upper adapter flange is hoisted, the upper edge of the upper adapter flange is welded and fixed with the inner cylinder wall and the outer cylinder wall, the bent bolt mounting cavity and the reserved hole are welded and fixed, the limiting bolt mounting cavity and the limiting bolt mounting hole are welded and fixed, to ensure the tightness of the connection and the integrity of the structure, the assembly of the upper end of the cylinder body and the upper adapter flange is completed, and a three-directionally closed cylinder body structure is formed.

[0016] h, the surface of the tower cylinder prefabricated segment is cleaned, then a multi-layer anticorrosive coating is applied to the surface of the tower cylinder prefabricated segment, and subsequent inspection and repair work is carried out, to improve the anticorrosive performance and durability of the tower cylinder prefabricated segment and ensure the protection effect during long-term use.

[0017] After the tower cylinder prefabricated segment is prefabricated, it is inspected before leaving the factory, including size accuracy, material performance, surface quality and other aspects, to ensure that each prefabricated component meets the design requirements.

[0018] The dedicated transport equipment is used to transport the tower cylinder prefabricated segments to the site, and the tower cylinder prefabricated segments are cleaned, and it is checked whether the prefabricated parts are damaged in the transport process, such as whether the tower cylinder prefabricated segments are knocked and deformed, whether the upper / lower connecting flanges are scratched or deformed, etc.

[0019] The process of on-site hoisting and assembling is as follows:

[0020] Each tower cylinder prefabricated segment is hoisted in sequence from bottom to top by using hoisting equipment; the limiting block of the previous tower cylinder prefabricated segment is accurately connected with the limiting slot of the next tower cylinder prefabricated segment by using appropriate positioning devices or guiding systems, and at the same time, the limiting bolt passes through the limiting bolt mounting hole and is inserted into the pre-buried limiting bolt mounting cavity.

[0021] The connecting part of the adjacent two tower cylinder prefabricated segments is sealed, and a sealing material with good sealing performance and weather resistance is used to prevent rainwater, sand and the like from invading the connecting part, so as to ensure the performance and service life of the tower cylinder.

[0022] At the connecting part, the double-end curved bolt passes through the double-end curved bolt mounting hole and the curved bolt mounting cavity, the two threaded ends of the double-end curved bolt extend out of the inner cylinder wall and are fastened by nuts, so that firm connection is formed between the tower cylinder prefabricated segments.

[0023] The assembled wind power tower cylinder is comprehensively checked, and the checking content includes perpendicularity, coaxiality, fastening of the connecting part, sealing effect and installation quality of the auxiliary components and the like.

[0024] Adjustment and repair are carried out according to the problems found, such as re-tightening the loose bolts, repairing the poorly sealed parts, adjusting the deviated auxiliary components, so as to ensure that the assembled wind power tower cylinder meets the design requirements, has structural integrity, stability and functionality, and meets the operation and use requirements of the wind power equipment.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] The bolted assembled hollow sandwich steel pipe concrete wind power tower cylinder provided by the utility model fully utilizes the interaction of steel-concrete, effectively reduces the fatigue stress and improves the durability of the wind power tower cylinder; the steel-concrete combined structure tower cylinder effectively decomposes the pulsation component of the wind load through the quality, stiffness and damping system, so as to reduce the resonance risk of the structure; the double-end curved bolt is used to connect the prefabricated segments, pre-tightening force is applied, stable connecting stiffness is provided for the tower cylinder, the tower cylinder deforms cooperatively during service, and the integrity of the tower cylinder structure is effectively ensured. In addition, the double-end curved bolt connection does not need complex prestress applying equipment and process, the installation speed and efficiency under complex environment are improved, and the later maintenance cost is reduced.

[0027] The utility model discloses a reasonable cross section design and space layout, and the bending stiffness of tower drum is strengthened, and the bending moment produced by wind force is effectively resisted, and the stability of tower drum under complex wind conditions such as strong wind, turbulence and the like is ensured. For superhigh wind power tower drum, the bolted assembly type design simplifies the transportation and installation process of tower drum. The prefabricated tower drum section can be prefabricated in factory, and the precision is high and the quality is stable, and the construction period is greatly shortened, in addition, the assembly type structure is convenient for in situ reconstruction and expansion of the wind turbine in service, thereby prolonging the life of wind turbine generator unit. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the structural schematic diagram of the utility model.

[0029] Figure 2 It is the structural schematic diagram of the tower drum prefabricated section in the utility model.

[0030] Figure 3 It is the structural schematic diagram of the cylinder in the utility model.

[0031] Figure 4 It is the structural schematic diagram of the upper adapter flange in the utility model.

[0032] Figure 5 It is the structural schematic diagram of the lower adapter flange in the utility model.

[0033] In the drawing, 1 is the tower drum prefabricated section, 2 is the upper adapter flange, 3 is the lower adapter flange, 4 is the cylinder, 5 is the limiting bolt mounting cavity, 6 is the curved bolt mounting cavity, 7 is the nut, 8 is the double -end curved bolt, 9 is the limiting bolt, 10 is the inner cylinder wall, 11 is the outer cylinder wall, 12 is the concrete filling layer, 13 is the limiting groove, 14 is the limiting block, 15 is the limiting bolt mounting hole, 16 is the double -end curved bolt mounting hole. DETAILED DESCRIPTION

[0034] The specific embodiments of the utility model will be described below in combination with the drawings.

[0035] A bolted assembly type hollow sandwich steel pipe concrete wind power tower drum, comprising a plurality of tower drum prefabricated segments 1 connected in sequence, further, each assembly type hollow sandwich steel pipe concrete wind power tower drum comprises a plurality of tower drum prefabricated segments 1, and 1-3 tower drum segments are taken as an example in the embodiment. With the increase of the power of the wind turbine, the tower height can reach 160 meters or more, the tower drum prefabricated segment 1 comprises a drum body 4 filled with a concrete filling layer 12, the outer diameter of the drum body 4 is less than or equal to 4.5 m to meet the transportation requirements of the highway, the drum body 4 comprises an inner drum wall 10, an outer drum wall 11 and the concrete filling layer 12 sandwiched between the inner drum wall 10 and the outer drum wall 11, the steel-concrete interaction is fully utilized, thereby effectively enhancing the rigidity of the tower drum structure and reducing the vibration of the wind power tower drum, the upper adapter flange 2 and the lower adapter flange 3 are respectively welded to the two ends of the drum body 4, a plurality of limiting blocks 14 are uniformly arranged on the top end face of the tower drum prefabricated segment 1, limiting bolt mounting holes 15 and double-end bent bolt mounting holes 16 are arranged at intervals between the limiting blocks 14, a limiting groove 13 matched with the limiting blocks 14 of the next tower drum prefabricated segment 1 is arranged on the bottom end face of the tower drum prefabricated segment 1, limiting bolts 9 and double-end bent bolt mounting holes 16 are arranged at intervals between the limiting grooves 13, the limiting bolts 9 are matched with the limiting bolt mounting holes 15, further, a limiting bolt mounting cavity 5 opposite to and communicating with the limiting bolt mounting hole 15 is arranged in the upper end of the drum body 4, the limiting bolt 9 penetrates through the limiting bolt mounting hole 15 and is assembled in the limiting bolt mounting cavity 5;

[0036] The adjacent two tower drum prefabricated segments 1 are connected through the double-end bent bolts 8, specifically, the upper and lower ends of the concrete filling layer 12 are respectively provided with bent bolt mounting cavities 6, one end of the bent bolt mounting cavity 6 is welded on the inner drum wall 10 and penetrates through the inner drum wall 10, the other end is in communication with the double-end bent bolt mounting hole 16, and each double-end bent bolt mounting hole 16 corresponds to the bent bolt mounting cavity 6 in one-to-one correspondence; the upper adapter flange 2 and the lower adapter flange 3 are connected and contacted by being assembled with the double-end bent bolts 8 in the double-end bent bolt mounting holes 16 and the bent bolt mounting cavities 6 of the contact ends of the adjacent two tower drum prefabricated segments 1, and the two ends of the double-end bent bolts 8 protrude out of the inner wall of the tower drum prefabricated segment 1 and are fixed through the nuts 7.

[0037] In use, the tower drum prefabricated segments 1 are all prefabricated in the factory, the bolted assembly type hollow sandwich steel pipe concrete wind power tower drum is sequentially spliced from bottom to top by a plurality of tower drum prefabricated segments 1, and only needs to be hoisted and longitudinally spliced on site and connected through the double-end bent bolts 8 and the nuts 7.

[0038] The prefabrication process of the tower drum prefabricated segment 1 is as follows:

[0039] a, horizontally place the upper adapter flange 2 and the lower adapter flange 3, polish the surface of the adapter flanges, and make the flatness, roughness and cleanliness meet the welding requirements, and carry out groove processing on the adapter flanges according to the welding process to ensure the welding quality and connection performance.

[0040] b, weld and fix the edge of the limiting bolt 9 with the reserved hole of the lower adapter flange 3, and ensure that the limiting bolt 9 corresponds to the limiting bolt mounting hole 15 arranged on the upper adapter flange 2.

[0041] c, fix the inner cylinder wall 10 and the outer cylinder wall 11 on the operating platform by using a special clamp or positioning device to ensure the concentricity, assemble the lower adapter flange 3 below the clamp or positioning device, adjust the position to ensure the coaxiality of the lower adapter flange 3 and the inner cylinder wall 10 and the outer cylinder wall 11, and weld and fix the lower adapter flange 3 with the lower edge of the inner cylinder wall 10 and the outer cylinder wall 11 to realize the accurate connection of the cylinder body 4 and the lower adapter flange 3.

[0042] d, weld and fix the bent bolt mounting cavity 6 at the lower end of the cylinder body 4 between the double-head bent bolt mounting hole 16 of the lower adapter flange 3 and the reserved hole of the inner cylinder wall 10 to complete the assembly of the lower end of the cylinder body 4 and the lower adapter flange 3.

[0043] e, use temporary support to fix the bent bolt mounting cavity 6 and the limiting bolt mounting cavity 5 at the upper end of the cylinder body 4 at the opening of the upper end of the cylinder body 4 to avoid displacement of the embedded parts during construction and ensure the accuracy and structural stability of subsequent construction.

[0044] f, carry out plugging operation on both ends of the limiting bolt mounting cavity 5 and the bent bolt mounting cavity 6 at the upper end of the cylinder body 4 to prevent concrete material from entering during grouting; pour from the opening at the upper end of the cylinder body 4 to form a concrete filling layer 12 to ensure the filling effect inside the structure.

[0045] g, maintain the concrete filling layer 12, remove the temporary support, accurately butt joint the reserved hole and the limiting bolt mounting hole 15 of the upper adapter flange 2 respectively, hoist the upper adapter flange 2, weld and fix the upper adapter flange 2 with the upper edge of the inner cylinder wall 10 and the outer cylinder wall 11, weld and fix the bent bolt mounting cavity 6 and the reserved hole, and weld and fix the limiting bolt mounting cavity 5 and the limiting bolt mounting hole 15 to ensure the tightness of the connection and the integrity of the structure, complete the assembly of the upper end of the cylinder body 4 and the upper adapter flange 2, and thus form a three-directionally closed cylinder structure.

[0046] h, clean the surface of the tower cylinder prefabricated segment 1, then carry out coating operation of multi-layer anticorrosive coating on the surface of the tower cylinder prefabricated segment 1, and carry out subsequent inspection and repair work to improve the anticorrosive performance and durability of the tower cylinder prefabricated segment 1 and ensure the protection effect in long-term use.

[0047] After the tower section 1 is prefabricated, it is inspected before delivery, including size accuracy, material performance, surface quality, etc., to ensure that each prefabricated component meets the design requirements.

[0048] The tower section 1 is transported to the site by special transportation equipment, and the surface of the tower section 1 is cleaned. During transportation, it is checked whether the prefabricated part is damaged, such as whether the tower section 1 is scratched or deformed, and whether the upper / lower connecting flange is scratched or deformed. For components with minor damage, repair or replacement is required to ensure the integrity and quality of the components.

[0049] The process of on-site hoisting and assembly is as follows:

[0050] Each tower section 1 is hoisted from bottom to top by hoisting equipment; the limiting block 14 of the previous tower section 1 is accurately connected with the limiting groove 13 of the next tower section 1 using appropriate positioning devices or guide systems, and at the same time, the limiting bolt 9 is inserted into the pre-buried limiting bolt mounting cavity 5 through the limiting bolt mounting hole 15.

[0051] The connecting part of the adjacent two tower sections 1 is sealed, and a sealing material with good sealing performance and weather resistance is used to prevent rainwater, sand and other factors from entering the connecting part, and to ensure the performance and service life of the tower.

[0052] At the connecting part, the double-end bent bolt 8 passes through the double-end bent bolt mounting hole 16 and the bent bolt mounting cavity 6, and the two threaded ends of the double-end bent bolt 8 extend out of the inner cylinder wall 10 and are fastened with the nut 7, so that the tower sections 1 are firmly connected.

[0053] The assembled wind tower is comprehensively inspected, including verticality, coaxiality, tightness of the connecting part, sealing effect, and installation quality of auxiliary components.

[0054] Adjust and repair the problems found, such as re-tightening loose bolts, repairing poorly sealed parts, adjusting deviated auxiliary components, etc., to ensure that the assembled wind tower meets the design requirements, has structural integrity, stability and functionality, and meets the operation and use requirements of wind power equipment.

[0055] The scope of protection of the utility model is not limited to the above specific embodiments, and for those skilled in the art, the utility model can have various modifications and changes, and any modification, improvement and equivalent replacement within the concept and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A bolted prefabricated hollow sandwich steel pipe concrete wind turbine tower, characterized in that: The tower prefabricated section (1) is composed of several sections connected in sequence. Several limiting blocks (14) are evenly distributed on the top end face of the tower prefabricated section (1). Limiting bolt mounting holes (15) and double-headed bent bolt mounting holes (16) are provided between the limiting blocks (14). Limiting grooves (13) that cooperate with the limiting blocks (14) of the next tower prefabricated section (1) are provided on the bottom end face of the tower prefabricated section (1). Limiting bolts (9) and double-headed bent bolt mounting holes (16) are provided between the limiting grooves (13). The limiting bolts (9) cooperate with the limiting bolt mounting holes (15). Two adjacent tower prefabricated sections (1) are connected by double-headed bent bolts (8).

2. The prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 1, characterized in that: The precast tower section (1) includes a cylinder (4) filled with a concrete filling layer (12), and the two end faces of the cylinder (4) are respectively welded with an upper transition flange (2) and a lower transition flange (3).

3. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 2, characterized in that: The upper end of the cylinder (4) is located in the concrete filling layer (12) and has a limit bolt mounting cavity (5) that is directly opposite to and connected to the limit bolt mounting hole (15). The limit bolt (9) passes through the limit bolt mounting hole (15) and is assembled in the limit bolt mounting cavity (5).

4. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 2, characterized in that: The cylinder (4) includes an inner cylinder wall (10), an outer cylinder wall (11), and a concrete filling layer (12) sandwiched between the inner cylinder wall (10) and the outer cylinder wall (11).

5. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 4, characterized in that: The upper and lower ends of the concrete filling layer (12) are respectively provided with bending bolt mounting cavities (6). One end of the bending bolt mounting cavity (6) is welded to the inner cylinder wall (10) and penetrates the inner cylinder wall (10), and the other end is connected to the double-headed bending bolt mounting hole (16).

6. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 5, characterized in that: Each double-headed bent bolt mounting hole (16) corresponds one-to-one with the bent bolt mounting cavity (6).

7. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 1, characterized in that: The two ends of the double-headed bending bolt (8) extend out of the inner wall of the precast tower section (1) and are fixed by nuts (7).

8. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 2, characterized in that: Two adjacent precast tower sections (1) are connected by double-headed bent bolt mounting holes (16) at the contact end and double-headed bent bolts (8) assembled in the bent bolt mounting cavity (6), and are fitted by the upper transition flange (2) and the lower transition flange (3).

9. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 8, characterized in that: Each prefabricated hollow sandwich steel tube concrete wind turbine tower consists of 3 to 10 prefabricated tower sections (1).

10. A prefabricated hollow sandwich steel tube concrete wind turbine tower according to claim 2, characterized in that: The outer diameter of the cylinder (4) is less than or equal to 4.5m.

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