阅读说明：本技术 一种风力发电机组的钢-混凝土组合结构转接段 (Steel-concrete composite structure switching section of wind generating set ) 是由 谭继可 李守振 周绪红 王宇航 邓然 曹锋 王康 罗伟 李强 周扬 郭松龄 曾 于 2021-10-09 设计创作，主要内容包括：本发明公开了一种风力发电机组的钢-混凝土组合结构转接段,涉及陆上风力发电技术领域。该转接段包括外钢壳、内钢壳、外侧短加劲肋、内侧短加劲肋、抗剪栓钉、环向钢筋、径向拉筋、夹层混凝土,所述转接段上部与钢塔筒底部通过长螺杆进行螺栓连接,所述转接段下部通过灌浆的方式与混凝土塔筒顶部连接,并通过张拉预应力钢绞线压紧连接界面。将本发明应用到钢-混凝土混合塔筒结构中,将有效改善转接段的受力性能,减少材料用量并降低施工成本。(The invention discloses a steel-concrete combined structure switching section of a wind generating set, and relates to the technical field of onshore wind power generation. This switching section includes outer steel casing, interior steel casing, outside short stiffening rib, inboard short stiffening rib, shear bolt nail, hoop reinforcing bar, radial lacing wire, intermediate layer concrete, switching section upper portion and steel tower bobbin base portion carry out bolted connection through the long screw, the switching section lower part is connected through the mode of grout and concrete tower bobbin top to compress tightly the interface through stretch-draw prestressing steel strand wires. The invention is applied to the steel-concrete mixed tower cylinder structure, so that the stress performance of the switching section is effectively improved, the material consumption is reduced, and the construction cost is reduced.)

1. The utility model provides a wind generating set's steel-concrete integrated configuration changeover portion which characterized in that: its switching section contains outer steel casing (1), interior steel casing (2), outside short stiffening rib (3), inboard short stiffening rib (4), shear-resistant peg (5), hoop reinforcing bar (6), radial lacing wire (7), intermediate layer concrete (8), outer steel casing (1) and interior steel casing (2) are placed with one heart, intermediate layer concrete (8) are located the cavity between outer steel casing (1) and interior steel casing (2), prestressing force pore canal (81) and long screw rod pore canal (82) are reserved to intermediate layer concrete (8) inside, switching section upper portion and steel tower section of thick bamboo (9) bottom carry out bolted connection through long screw rod (10), the switching section lower part is connected through the mode of grout and concrete tower section of thick bamboo (11) top to compress tightly interface through stretch-draw prestressing force steel strand wires (12).

2. The steel-concrete composite structural transition section of a wind generating set according to claim 1, wherein: outer steel casing (1) comprises outer steel casing vertical section (13) and outer steel casing slope section (14), interior steel casing (2) comprises interior steel casing vertical section (21), interior steel casing horizontal segment (22) and interior steel casing shirt rim (23).

3. The steel-concrete composite structural transition section of a wind generating set according to claim 2, wherein: the anti-shearing bolt is characterized in that a prestressed hole (24) and a long screw hole (25) are reserved in the horizontal section (22) of the inner steel shell, so that a long screw (10) and a prestressed steel strand (12) can penetrate through the horizontal section, the diameter of the circumference where the prestressed hole (24) is located is smaller than that of the circumference where the long screw hole (22) is located, and the anti-shearing bolts (5) are uniformly arranged on the inner side of the outer steel shell (1) and the outer side of the inner steel shell (2).

4. The steel-concrete composite structural transition section of a wind generating set according to claim 1, wherein: the outer short stiffening rib (3) is uniformly welded on the inner side of the outer steel shell (1) along the annular direction, the inner short stiffening rib (4) is uniformly welded on the outer side of the inner steel shell (2) along the annular direction, outer stiffening rib holes (31) and inner stiffening rib holes (41) which can be penetrated by annular reinforcing steel bars (6) or radial reinforcing steel bars (7) are reserved on the outer short stiffening rib (3) and the inner short stiffening rib (4) respectively, and the positions of the outer stiffening rib holes (31) and the inner stiffening rib holes (41) correspond to each other in the height direction.

5. The steel-concrete composite structural transition section of a wind generating set according to claim 4, wherein: the length of hoop reinforcing bar (6) and radial lacing wire (7) is not less than 12D, wherein D is the reinforcing bar diameter, the tip of hoop reinforcing bar (6) does not have the crotch, connects adjacent two outside short stiffening ribs (3) or inboard short stiffening rib (4), the tip of radial lacing wire (7) has the right angle crotch, connects outside short stiffening rib (3) and inboard short stiffening rib (4) of same radial direction, hoop reinforcing bar (6) and radial lacing wire (7) are along direction of height staggered arrangement according to the design requirement, the direction of radial lacing wire (7) crotch is along direction of height staggered opposite arrangement.

6. The steel-concrete composite structural transition section of a wind generating set according to claim 1, wherein: the end part of the hoop reinforcing steel bar (6) is not provided with a hook, two adjacent outer short stiffening ribs (3) or inner short stiffening ribs (4) are connected, the end part of the radial lacing wire (7) is provided with a right-angle hook, the outer short stiffening ribs (3) and the inner short stiffening ribs (4) in the same radial direction are connected, the hoop reinforcing steel bar (6) and the radial lacing wire (7) are arranged in a staggered mode along the height direction according to design requirements, and the direction of the radial lacing wire (7) hooks is arranged in a staggered mode along the height direction.

Technical Field

The invention relates to the technical field of onshore wind power generation.

Background

In order to reduce the wind abandon rate and the wind power transportation cost and improve the market competitiveness of wind power energy, the center of gravity of wind power energy development in China is shifted from a high wind speed area to a low wind speed area, and higher requirements are put forward on the installed capacity and the hub height of a wind driven generator. The steel-concrete hybrid tower cylinder is a tower cylinder form developed in recent years, overcomes the defects of small rigidity, outstanding stability problem, low economic height, heavy weight and long construction period of a concrete tower cylinder, and is widely applied to low wind speed areas.

In the steel-concrete hybrid tower cylinder, the adapter section is an important member for connecting the upper steel tower cylinder and the lower concrete tower cylinder, and has the characteristic of complex stress, while the traditional reinforced concrete adapter section has the defects of complex manufacturing process, long construction period, easy surface crack generation and the like. Accordingly, there is a need to develop a hybrid tower transition segment that has good stress performance and is easy to construct.

Disclosure of Invention

The technical problem is as follows: the invention provides a combined type adapter section of a hybrid tower barrel, which has good stress performance and is convenient and fast to construct.

The technical scheme is as follows: the invention relates to a steel-concrete combined structure switching section of a wind generating set, which comprises an outer steel shell, an inner steel shell, outer short stiffening ribs, inner short stiffening ribs, shear-resistant studs, circumferential reinforcing steel bars, radial tie bars and interlayer concrete, wherein the outer steel shell and the inner steel shell are concentrically arranged, the interlayer concrete is positioned in a cavity between the outer steel shell and the inner steel shell, a pre-stressed pore passage and a long screw pore passage are reserved in the interlayer concrete, the upper part of the switching section is in bolt connection with the bottom of a steel tower cylinder through a long screw, and the lower part of the switching section is connected with the top of the concrete tower cylinder in a grouting mode and compresses a connection interface through a tension pre-stressed steel strand.

Further, the steel-concrete composite structure switching section of the wind generating set is characterized in that: the outer steel shell is composed of an outer steel shell vertical section and an outer steel shell inclined section, and the inner steel shell is composed of an inner steel shell vertical section, an inner steel shell horizontal section and an inner steel shell skirt edge.

Further, the steel-concrete composite structure switching section of the wind generating set is characterized in that: the horizontal section of the inner steel shell is reserved with a prestress hole and a long screw hole so that a long screw and a prestress steel strand can pass through the horizontal section, the diameter of the circumference of the prestress hole is smaller than that of the circumference of the long screw hole, and the shear-resistant studs are uniformly arranged on the inner side of the outer steel shell and the outer side of the inner steel shell.

Further, the steel-concrete composite structure switching section of the wind generating set is characterized in that: the outer short stiffening ribs are uniformly welded on the inner side of the outer steel shell along the annular direction, the inner short stiffening ribs are uniformly welded on the outer side of the inner steel shell along the annular direction, outer stiffening rib holes and inner stiffening rib holes which can be penetrated by annular reinforcing steel bars or radial pulling bars are reserved on the outer short stiffening ribs and the inner short stiffening ribs respectively, and the positions of the outer stiffening rib holes and the inner stiffening rib holes correspond to each other in the height direction.

Further, the steel-concrete composite structure switching section of the wind generating set is characterized in that: the length of the hoop reinforcing steel bars and the length of the radial lacing bars are not less than 12D, wherein D is the diameter of the reinforcing steel bars, no hook is arranged at the end parts of the hoop reinforcing steel bars, two adjacent outer short stiffening ribs or inner short stiffening ribs are connected, right-angle hooks are arranged at the end parts of the radial lacing bars, the outer short stiffening ribs and the inner short stiffening ribs in the same radial direction are connected, the hoop reinforcing steel bars and the radial lacing bars are arranged in a staggered mode along the height direction according to design requirements, and the direction of the hook of the radial lacing bars is arranged in a staggered mode along the height direction.

Further, the steel-concrete composite structure switching section of the wind generating set is characterized in that: the end part of the annular steel bar is not provided with a hook, two adjacent outer short stiffening ribs or inner short stiffening ribs are connected, the end part of the radial lacing wire is provided with a right-angle hook, the outer short stiffening ribs and the inner short stiffening ribs in the same radial direction are connected, the annular steel bar and the radial lacing wire are arranged in a staggered mode along the height direction according to design requirements, and the direction of the radial lacing wire hooks is arranged in a staggered and opposite mode along the height direction.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) compared with the traditional reinforced concrete transition section, the combined transition section disclosed by the invention has the advantages of attractive appearance, convenience in construction and high construction quality. The steel member in the invention can be prefabricated and welded in a factory; the short stiffening ribs are provided with holes for the lacing wires to pass through, so that the positioning and the installation of the lacing wires are convenient; need not to dispose the reinforcing bar in the intermediate layer concrete, avoided loaded down with trivial details reinforcement process, both guaranteed construction quality and also improved the efficiency of construction.

(2) The inner steel shell and the outer steel shell of the combined type switching section are connected through the inner short stiffening ribs and the outer short stiffening ribs and the radial lacing bars, and the outer sides of the inner steel shell and the inner sides of the outer steel shell are provided with the shear-resistant studs, so that the integral stress performance of the structure is improved. On one hand, the structure ensures that reliable force transmission paths are arranged between the inner steel shell and the outer steel shell and between the inner steel shell and the outer steel shell as well as between the sandwich concrete, so that the whole structure participates in stress; on the other hand, the short stiffening ribs can ensure the continuity of the sandwich concrete.

(3) The combined type switching section disclosed by the invention fully utilizes the material performance of steel and concrete and has good durability. Under the action of the shear resistant studs and the short stiffening ribs, the steel member and the concrete work cooperatively, and the compression resistance of the concrete and the tensile resistance of steel are fully utilized; the sandwich concrete is wrapped by the inner steel shell and the outer steel shell, so that the problem of structural durability caused by cracks generated on the surface of the switching section is solved.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention

FIG. 3 is a schematic view of the connection of the outer steel shell with the outer short stiffening ribs and the shear pins;

FIG. 4 is a schematic view of the connection of the inner steel shell with the inner short stiffening ribs and the shear pins;

FIG. 5 is a schematic view showing the connection of inner and outer short stiffening ribs with circumferential reinforcing bars and radial lacing wires;

in the figure: 1-outer steel shell, 13-outer steel shell vertical section, 14-outer steel shell inclined section, 2-inner steel shell, 21-inner steel shell vertical section, 22-inner steel shell horizontal section, 23-inner steel shell skirt edge, 24-prestressed hole, 25-long screw hole, 3-outer short stiffening rib, 31-outer stiffening rib hole, 4-inner short stiffening rib, 41-inner stiffening rib hole, 5-shear bolt, 6-circumferential reinforcing steel bar, 7-radial reinforcing steel bar, 8-sandwich concrete, 81-prestressed hole channel, 82-long screw hole channel, 9-steel tower cylinder, 10-long screw, 11-concrete tower cylinder and 12-prestressed stranded wire.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a steel-concrete composite structure transition section of a wind generating set relates to the technical field of land wind power generation. This changeover portion contains outer steel casing 1, interior steel casing 2, outside short stiffening rib 3, inboard short stiffening rib 4, shear-resistant peg 5, hoop reinforcing bar 6, radial lacing bar 7, intermediate layer concrete 8, the thickness of outside short stiffening rib 3 and inboard short stiffening rib 4 should not be less than 12mm, outer steel casing 1 and interior steel casing 2 are placed with one heart, intermediate layer concrete 8 is located the cavity between outer steel casing 1 and interior steel casing 2, prestressing force pore 81 and long screw rod pore 82 are reserved to intermediate layer concrete 8 inside, changeover portion upper portion carries out bolted connection through long screw rod 10 with steel tower section of thick bamboo 9 bottom, the changeover portion lower part is connected with concrete tower section of thick bamboo 11 top through the mode of grout to compress tightly the interface through stretch-draw prestressing force steel strand 12.

As shown in fig. 3 and 4, the outer steel shell 1 is composed of an outer steel shell vertical section 13 and an outer steel shell inclined section 14, the proportion range of the outer steel shell vertical section 13 and the outer steel shell inclined section 14 is [0,1], and specific values are determined according to calculation results of actual design. The inner steel shell 2 consists of an inner steel shell vertical section 21, an inner steel shell horizontal section 22 and an inner steel shell skirt 23, and the inner steel shell skirt 23 is arranged to facilitate the operation of a grouting process. The inner steel shell skirt 23 is inclined at a certain angle to increase the sectional area of the root part of the inner steel shell skirt 23 and improve the local resistance, and the specific inclination angle is determined according to the calculation result of the actual design. The horizontal section 22 of the inner steel shell is reserved with a prestressed hole 24 and a long screw hole 25 so that the long screw 10 and the prestressed steel strand 12 can pass through, the diameter of the circumference of the prestressed hole 24 is smaller than that of the circumference of the long screw hole 22, and the shear resistant studs 5 are uniformly arranged on the inner side of the outer steel shell 1 and the outer side of the inner steel shell 2. The outer short stiffening ribs 3 are uniformly welded on the inner side of the outer steel shell 1 along the circumferential direction, the inner short stiffening ribs 4 are uniformly welded on the outer side of the inner steel shell 2 along the circumferential direction, outer stiffening rib holes 31 and inner stiffening rib holes 41 which can be penetrated by circumferential reinforcing steel bars 6 or radial reinforcing steel bars 7 are reserved on the outer short stiffening ribs 3 and the inner short stiffening ribs 4 respectively, the positions of the outer stiffening rib holes 31 and the positions of the inner stiffening rib holes 41 correspond to each other in the height direction, and the diameter of each hole is not smaller than the sum of the diameter of the circumferential reinforcing steel bars 6 or the radial reinforcing steel bars 7 and the maximum particle size of concrete aggregate.

As shown in fig. 5, the lengths of the circumferential steel bar 6 and the radial tie bars 7 are not less than 12D, where D is a steel bar diameter, the end portions of the circumferential steel bar 6 are not provided with hooks, and are connected to two adjacent outer short stiffening ribs 3 or inner short stiffening ribs 4, the end portions of the radial tie bars 7 are provided with right-angle hooks, and are connected to the outer short stiffening ribs 3 and the inner short stiffening ribs 4 in the same radial direction, the circumferential steel bar 6 and the radial tie bars 7 are arranged in a staggered manner in the height direction according to design requirements, and the hooks of the radial tie bars 7 are arranged in a staggered manner in the height direction.

The foregoing is merely a preferred embodiment of the present invention, but the present invention is not limited to the specific embodiments described above. Those skilled in the art should appreciate that they may readily use the disclosed conception and specific embodiments as a basis for modifying, supplementing or modifying other structures for providing out the same purposes of the present invention.

Although used more herein: 1-outer steel shell, 13-outer steel shell vertical section, 14-outer steel shell inclined section, 2-inner steel shell, 21-inner steel shell vertical section, 22-inner steel shell horizontal section, 23-inner steel shell skirt, 24-prestressed hole, 25-long screw hole, 3-outer short stiffening rib, 31-outer stiffening rib hole, 4-inner short stiffening rib, 41-inner stiffening rib hole, 5-shear bolt, 6-hoop reinforcement, 7-radial tie bar, 8-sandwich concrete, 81-prestressed hole channel, 82-long screw hole channel, 9-steel tower cylinder, 10-long screw, 11-concrete tower cylinder, 12-prestressed steel strand and other terms, but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.