Duct piece structure capable of improving structural adhesive deficiency of horizontal seam of wind power mixed tower

Abstract

The invention relates to the technical field of wind power mixed towers, in particular to a duct piece structure capable of improving the deficiency of structural adhesive in a horizontal seam of a wind power mixed tower, the top and the bottom of a duct piece are provided with tooth-shaped structures in the thickness direction of the duct piece, and tooth grooves of the tooth-shaped structures are used for being filled with the structural adhesive; the tooth-shaped structures at the bottoms of the segments on the upper layer are matched with the tooth-shaped structures at the tops of the segments on the lower layer and are fixedly connected through structural adhesives. According to the invention, the filling structural adhesive can be compactly filled in the horizontal seam, and the void phenomenon is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power hybrid towers, and particularly to a segment structure that can improve the lack of structural adhesive in the horizontal joint of a wind power hybrid tower. Background Art

[0002] With the continuous development of the wind turbine market, in order to obtain better wind speeds and at the same time ensure the safe distance of the blades from the ground, the height of the wind turbine tower is getting higher and higher. To solve the problems of the flexibility of the all-steel tower and the insufficient rising space of the height, the steel-concrete tower solution (referring to the tower system composed of steel and concrete, usually the lower part is the concrete section and the upper part is the steel tower section) has become the mainstream of high-tower construction in the market. The horizontal splicing joint between adjacent hybrid tower sections (concrete sections) of the steel-concrete tower is an important assembly node of the hybrid tower. The horizontal joint of the hybrid tower section is mainly spliced by applying epoxy resin structural adhesive, and this splicing method can better enhance the integrity of the hybrid tower.

[0003] The construction quality of the epoxy resin structural adhesive is greatly affected by human operation factors, and there are mainly the following problems: At present, the grouting method is adopted, and the filling of the structural adhesive on the splicing surface is insufficient or locally uneven. There are often phenomena of uneven and non-compact slurry in the horizontal joint; when the hybrid tower is grouted in a whole section, the inner side of the segment can be judged whether there is void by a sounding rod and external bleeding of slurry, while the outer side is difficult to observe and it is inconvenient to supplement the structural adhesive; when the lack of the structural adhesive in the horizontal joint is too large, the segment of the hybrid tower (the segment of the concrete tower) will have a crushing phenomenon. Summary of the Invention

[0004] In view of this, the present invention provides a segment structure that can improve the lack of structural adhesive in the horizontal joint of a wind power hybrid tower, so that the filled structural adhesive is filled densely in the horizontal joint and the void phenomenon is reduced.

[0005] The present invention is realized through the following technical solutions: A segment structure that can improve the lack of structural adhesive in the horizontal joint of a wind power hybrid tower, wherein tooth-like structures are provided along the thickness direction of the top and bottom of the segment. The tooth grooves of the tooth-like structures are used for filling the structural adhesive. The tooth-like structure at the bottom of the upper segment cooperates with the tooth-like structure at the top of the lower segment and is fixedly connected by the structural adhesive.

[0006] Further, the tooth-like structure at the top of the segment is composed of two tooth grooves and the tooth between the tooth grooves. The tooth-like structure at the bottom of the segment is composed of two teeth and the tooth groove between the teeth; the cross-sections of the tooth groove and the tooth are both trapezoidal structures, and the sum of the volumes of the two tooth grooves at the top of the segment is greater than the backfill volume of the structural adhesive in the horizontal joint.

[0007] Further, a plurality of sealing strips are provided at both the inner edge and the outer edge of the top of the segment, and the adjacent sealing strips are spaced at a certain distance to form exhaust holes.

[0008] Further, the length of the sealing strip is 20 - 30 cm, the width of the sealing strip is 15 - 20 mm, and the thickness of the sealing strip is 2 - 3 mm.

[0009] Further, the thickness of the segment is D, and the upper and lower side lengths of the trapezoidal structure are 0.3D and 0.1D respectively.

[0010] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0011] 1. The tooth grooves of the present invention are used to fill structural adhesives, which can accurately control the filling amount of the structural adhesives, avoiding the phenomena of uneven and non-dense structural adhesives caused by the working level of workers during the puttying operation; the tooth-like structures of the upper and lower segments cooperate with each other, increasing the horizontal shear resistance, and at the same time expanding the stress-bearing area of the upper and lower segments, weakening the cracking phenomenon caused by excessive local stress at the horizontal joints of the segments, and ensuring the safety of the structure.

[0012] 2. The sum of the volumes of the two tooth grooves at the top of the segment of the present invention is greater than the backfill volume of the structural adhesive at the horizontal joint, ensuring that the joint is filled, solving the deficiencies in the splicing treatment method of the horizontal joint of the concrete tower segment, and further ensuring the dense filling of the structural adhesive.

[0013] 3. The present invention can judge whether the structural adhesive at the horizontal joint is filled sufficiently through the bleeding of the slurry from the exhaust holes inside and outside the segment. Especially compared with the existing situation where it is difficult to observe the outside of the segment, only by paying attention to the bleeding of the slurry from the outside exhaust hole can it be judged whether there is void, greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top sectional view of the top of the hybrid tower segment.

[0015] Figure 2 It is a sectional view of the horizontal joint splicing between the hybrid tower segments.

[0016] Figure 3 It is a top view of the top of the 1 / 5 hybrid tower segment.

[0017] Among them, 1 - lower segment, 2 - tooth-like structure, 3 - 1 - inner waterproof sealing strip, 3 - 2 - outer waterproof sealing strip, 4 - upper segment, 5 - structural adhesive, 6 - exhaust hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The present invention provides a segment structure that can improve the lack of structural adhesive at the horizontal joint of a wind power hybrid tower, as Figure 1As shown, tooth-like structures 2 are provided at the top and bottom of the segment along the segment thickness direction. The tooth grooves of the tooth-like structures 2 are used to fill with structural adhesive 5. The tooth-like structure 2 at the bottom of the upper segment (upper segment 4) cooperates with the tooth-like structure 2 at the top of the lower segment (lower segment 1), and they are fixedly connected through the structural adhesive 5.

[0020] In specific implementation, the number of tooth grooves of the tooth-like structure 2 can be determined according to the actual situation. In this embodiment, as Figure 2 shown, the tooth-like structure 2 at the top of the segment is composed of two tooth grooves and the teeth between the tooth grooves, and the tooth-like structure 2 at the bottom of the segment is composed of two teeth and the tooth grooves between the teeth; the tooth grooves and teeth extend along the segment length direction, the connection direction of the tooth grooves and teeth is parallel to the segment thickness direction, the cross-sections of the tooth grooves and teeth are both trapezoidal structures, and the sum of the volumes of the two tooth grooves at the top of the segment is greater than the backfill volume of the structural adhesive 5 in the horizontal joint. Specifically, the size of each layer of tooth grooves of the segment changes with the segment thickness. The segment thickness is D, and the lengths of the upper side (d 1 ) and the lower side (d 2 ) of the trapezoidal structure can be 0.3D and 0.1D respectively. The corresponding tooth groove height can be set according to the required backfill volume of the structural adhesive 5. Generally, the tooth groove height h can be 20 mm. The backfill volume of the structural adhesive 5 in the horizontal joint refers to the volume of the structural adhesive 5 in the horizontal joint after the upper segment 4 and the lower segment 1 are spliced and fixedly connected.

[0021] When prefabricating the segment structure of the present invention, a serrated mold can be used to shape the top and bottom of the segment. After shaping, the segment presents a tooth-like structure 2. For the convenience of mold manufacturing, the sizes of the two tooth grooves are the same. In specific implementation, the same mold is used to shape and pour the bottom of the upper segment 4 and the top of the lower segment 1 during the segment manufacturing process.

[0022] As Figure 3 shown, a plurality of sealing strips are provided at both the inner edge and the outer edge of the top of the segment. The sealing strips are placed along the segment length direction, and a certain distance is spaced between adjacent sealing strips to form exhaust holes 6; the length of the sealing strip is 20 - 30 cm, that is, the adjacent exhaust holes 6 are spaced 20 - 30 mm, the width of the sealing strip is 15 - 20 mm, and the thickness of the sealing strip is 2 - 3 mm; the width of the sealing strip refers to the length along the segment thickness direction, and the thickness of the sealing strip refers to the length along the segment height.

[0023] The sealing strip can be a waterproof sealing strip, which is arranged on the inner and outer sides of the top of the segment after the segment is formed. After each layer of segments is spliced to form a cylinder section, the inner waterproof sealing strip 3-1 and the outer waterproof sealing strip 3-2 respectively form corresponding annular structures. The exhaust holes 6 between the sealing strips are used for the structural adhesive 5 to fill and exhaust air, and the slurry bleeding through the exhaust holes 6 can be used to judge whether the structural adhesive 5 in the horizontal joint is void. Compared with the existing segment structure, when observing the slurry bleeding situation on the outside of the segment, the whole ring needs to be detected to identify the slurry bleeding phenomenon, while in the present invention, only the slurry bleeding situation of the exhaust holes 6 needs to be observed and judged, which greatly improves the working efficiency.

[0024] Aiming at the existing method of directly laying grout on the horizontal plane of the segment, the segment structure provided by the present invention changes the construction method of spreading the structural adhesive 5 on the traditional plane. First, during the pouring process of the segment, the top of the lower segment 1 is shaped by a serrated mold, and at the same time, the bottom of the upper segment 4 is made into a toothed structure 2 at the bottom by the same mold. During the hoisting process, the worker fills the entire tooth groove at the top of the lower segment 1 with the structural adhesive 5, and then directly places the upper segment 4 on the lower segment 1. The teeth and tooth grooves of the upper segment 4 cooperate with the tooth grooves and teeth of the lower segment 1, and the structural adhesive 5 is extruded. By observing the slurry bleeding through the exhaust holes 6, it can be judged whether the inside and outside are filled densely. The splicing surface of the segment structure is serrated, which increases the shear resistance in the horizontal direction, expands the stress-bearing area between the upper and lower segments, weakens the cracking phenomenon caused by excessive local stress in the horizontal joint of the segment, and ensures the safety of the structure.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A segment structure capable of improving the lack of structural adhesive in horizontal seams of wind power towers, characterized in that: The top and bottom of the segment are provided with a toothed structure along the thickness direction of the segment. The tooth grooves of the toothed structure are used to fill the structural adhesive. The toothed structure at the bottom of the upper segment cooperates with the toothed structure at the top of the lower segment and is fixed by the structural adhesive.

2. The segment structure capable of improving the lack of structural adhesive in horizontal seams of wind power towers according to claim 1, characterized in that: The toothed structure at the top of the segment consists of two tooth grooves and teeth between the tooth grooves, and the toothed structure at the bottom of the segment consists of two teeth and tooth grooves between the teeth; the cross-sections of the tooth grooves and teeth are both trapezoidal structures, and the sum of the volumes of the two tooth grooves at the top of the segment is greater than the structural adhesive backfill volume of the horizontal joint.

3. The segment structure capable of improving the lack of structural adhesive in horizontal seams of wind power towers according to claim 2, characterized in that: Several sealing strips are provided on the inner edge and the outer edge of the top of the pipe segment, and adjacent sealing strips are spaced a certain distance apart to form exhaust holes.

4. The segment structure capable of improving the lack of structural adhesive in horizontal seams of wind power towers according to claim 3, characterized in that: The length of the sealing strip is 20-30cm, the width of the sealing strip is 15-20mm, and the thickness of the sealing strip is 2-3mm.

5. The segment structure capable of improving the lack of structural adhesive in horizontal seams of wind power towers as claimed in any one of claims 2 to 4, characterized in that: The thickness of the segment is D, and the lengths of the upper and lower sides of the trapezoidal structure are 0.3D and 0.1D respectively.

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