Die for wind power concrete tower segment and method for improving quality of tower segment

Abstract

The invention discloses a wind power concrete tower segment mold and a method for improving the quality of a tower segment, the wind power concrete tower segment mold comprises a mold support, the mold support is provided with a mold body used for producing the tower segment, the cavity and the shape of the mold body are matched with the shape of the tower segment, and the mold body and the tower segment are both fan-shaped. The circumferential end face of one side of the mold body is a pouring opening and is higher than the circumferential end face of the other side of the mold body. According to the method for improving the quality of the tower segment, the lying mold of the wind power concrete tower segment is used, concrete is poured into the mold body from the circumferential end face side parallel to the horizontal plane, exhaust is conducted from low to high, and bubbles rise to the position of an upper sealing opening of a pouring opening, namely the circumferential end face of one side of the tower segment. Through a new duct piece manufacturing mode, natural characteristics in the concrete solidification process are utilized, and the uniformity of loaded planes at the two ends of the duct piece is improved, so that the manufacturing quality is improved, the inner and outer surface quality problems caused by exhaust are reduced, and the apparent quality of the inner and outer surfaces, especially the outer surface quality, is improved.

Description

Technical Field

[0001] The invention relates to a mold for a wind power concrete tower segment and a method for improving the quality of the tower segment, belonging to the technical field of wind power tower manufacturing. Background Art

[0002] The segmented tower is composed of multiple prefabricated tower sections, each of which is transported to the wind farm for on-site assembly after being prefabricated in the factory. The originally integrated tower is divided into several parts, and multiple tower segments are spliced ​​into a ring along the circumference. This allows a larger diameter tower to be manufactured without increasing the difficulty of transportation, thereby supporting higher-power wind turbines and adapting to different wind speeds and terrain conditions.

[0003] Conventional concrete segments are manufactured using vertical or horizontal molds. The formed segments are then combined into cylindrical shells to form a completed concrete tower. However, during the vertical mold concrete forming process, if the exhaust is not smooth, bubbles or voids will form on the axial joint surface of the concrete. These bubbles or voids will reduce the effective bearing area of ​​the concrete, thereby affecting the bearing capacity of the bearing surface. When the horizontal type is used, the bubbles or voids will be located on the inner and outer surfaces of the tower segments, resulting in low apparent quality of the outer surface of the tower segments. Summary of the invention

[0004] The purpose of the present invention is to provide a mold for wind power concrete tower segments and a method for improving the quality of tower segments in response to the above-mentioned problems. A new mold is used to simultaneously improve two key points so that bubbles or voids are not located on the inner and outer surfaces of the tower segments and the axial splicing surface, thereby significantly improving the acceptance of the mixed tower.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A lying mold for wind power concrete tower segments comprises a mold support, on which a mold body for producing tower segments is provided, the cavity and shape of the mold body match the shape of the tower segments and are both fan-shaped, and one side circumferential end face of the mold body is a pouring port and is higher than the other side circumferential end face.

[0007] Optionally, the mold body includes a bottom mold corresponding to the outer diameter surface of the tower tube segment, an inner mold corresponding to the inner diameter surface of the tower tube segment, a side mold corresponding to the two axial end surfaces of the tower tube segment, and a lower sealing mold and an upper sealing mold corresponding to the two circumferential side surfaces of the tower tube segment respectively, and the upper sealing mold is located at the highest point of the mold body.

[0008] Optionally, the upper sealing mold is detachably connected to the bottom mold, the inner mold and the side mold.

[0009] Optionally, the bottom mold is fixedly connected to the mold support.

[0010] Optionally, the inner mold is detachably connected to the upper sealing mold, the bottom mold and the side molds.

[0011] Optionally, the inner mold is a one-piece type, or a multi-piece type spliced ​​into one piece.

[0012] Optionally, the inner mold is hinged to the mold support.

[0013] Optionally, the inner mold is flipped downward and opened.

[0014] Optionally, the radial inner side surface of the inner mold is provided with grid reinforcement ribs.

[0015] A method for improving the quality of tower segments, using the lying mold of the wind power concrete tower segment, pouring concrete into the mold body from the circumferential end face side parallel to the horizontal plane, exhausting from low to high, and the bubbles rise to the upper sealing part of the pouring port, that is, the circumferential end face on one side of the tower segment.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] The present invention provides a mold for a wind power concrete tower segment and a method for improving the quality of the tower segment. Since the two places of the side mold are equally affected by gravity, the upper and lower bearing planes of the finished segment have the same bearing mass. Since the exhaust is from low to high, no rough marks will be produced on the outside and inside of the segment. The bubbles rise to the seal on the casting port. This surface is the side of the finished segment and is a non-important surface with a smaller load. After a simple repair and replacement of the glue treatment, it is hidden inside and does not affect the appearance. Through a new method of manufacturing segments, the natural characteristics of concrete during the solidification process are utilized to improve the uniformity of the load-bearing planes at both ends of the segment, thereby improving the manufacturing quality, reducing the quality problems of the internal and external surfaces caused by exhaust, and improving the apparent quality of the internal and external surfaces, especially the external surface quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the inner mold opening.

[0020] Figure 3 It is a schematic diagram of the upper sealing mold being opened.

[0021] Markings in the figure: 1-mold support, 2-bottom mold, 3-inner mold, 4-side mold, 5-lower sealing mold, 6-upper sealing mold, 7-grid reinforcement ribs. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying 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.

[0024] A lying mold for a wind power concrete tower segment, such as Figure 1-3 As shown, it includes a mold bracket 1, on which a mold body for producing tower segments is provided. The cavity and shape of the mold body match the shape of the tower segments and are both fan-shaped. One side circumferential end face of the mold body is a casting port and is higher than the other side circumferential end face.

[0025] During the pouring process of concrete, bubbles and lighter components will naturally rise due to gravity. In the lying mold, when the circumferential end face of the mold body is the highest point, it is the path for the bubbles to rise, and the bubbles tend to gather on this surface when they rise in the concrete. It can ensure that the axial bearing surface of the tower tube segment is more compact, thereby reducing defects on the key surface and improving the bearing capacity and structural strength of the tower tube segment. The main visible surface of the tower tube segment has fewer bubbles, and the appearance is smoother and more uniform, which improves the appearance quality of the product. Preferably, the bottom circumferential end face is the lowest point of the mold body, and the top circumferential end face is the highest point of the mold body. The lower circumferential end face of the lowest point allows concrete to be poured directly from above, and sinks naturally by gravity. The concrete does not need to move upward, so it is easier to fill the entire mold. This design reduces the gaps that may be formed by concrete at the bottom of the mold and ensures that the bottom of the mold is evenly filled. The top circumferential end face of the highest point serves as an exhaust channel, so that the bubbles in the concrete can smoothly rise to the top of the mold and be discharged, thereby reducing the bubbles and gaps inside the concrete. And bubbles and excess materials can be discharged from the exhaust port, reducing surface unevenness and honeycomb phenomenon. It helps to reduce the surface finishing work after concrete pouring. Further, the bottom circumferential end surface is perpendicular to the horizontal plane; and / or, the top circumferential end surface is parallel to the horizontal plane.

[0026] As another specific embodiment, the mold body includes a bottom mold 2 corresponding to the outer diameter surface of the tower tube segment, an inner mold 3 corresponding to the inner diameter surface of the tower tube segment, a side mold 4 corresponding to the two axial end surfaces of the tower tube segment, and a lower sealing mold 5 and an upper sealing mold 6 corresponding to the two circumferential side surfaces of the tower tube segment, respectively, and the upper sealing mold 6 is located at the highest point of the mold body. Through the combination of the bottom mold 2, the inner mold 3, the side mold 4, the lower sealing mold 5 and the upper sealing mold 6, it can be ensured that the produced tower tube segment has a precise size and shape. Concrete can be poured from one end, then flow in the mold and fill the entire space, and finally closed by the upper sealing mold 6. Since the upper sealing mold 6 is located at the highest point of the mold, during the pouring process of concrete, bubbles will rise as the concrete rises, and may eventually be discharged or gathered near the upper sealing mold 6, that is, the circumferential end surface of one side of the tower tube segment.

[0027] As another specific embodiment, the upper sealing mold 6 is detachably connected to the bottom mold 2, the inner mold 3 and the side mold 4. The detachable connection makes the installation and removal of the upper sealing mold 6 more convenient. When the upper sealing mold 6 is disassembled, the opening is used as a pouring port. In addition, the detachable design allows the upper sealing mold 6 to be fine-tuned during installation, ensuring that the sealing part is tightly combined with the mold body, reducing overflow and leakage during concrete pouring, and ensuring the dimensional accuracy and surface quality of the tower segment.

[0028] As another specific embodiment, the bottom mold 2 is fixedly connected to the mold support 1. The fixed connection ensures that the bottom mold 2 remains stable during the concrete pouring process and will not move due to external force or pressure during concrete pouring, thereby ensuring the dimensional accuracy and shape consistency of the tower segment. It helps to evenly distribute the force generated during concrete pouring to the mold support 1, reduce local stress concentration, and increase the service life of the mold.

[0029] As another specific embodiment, the inner mold 3 is a one-piece type, or a multi-piece type spliced ​​together. The one-piece inner mold 3 has no seams, a strong structural integrity, and is not easy to deform, which is conducive to ensuring the dimensional accuracy and surface finish of the tower tube segment. The installation process is simple, and no complicated splicing is required, saving installation time. The multi-piece inner mold 3 can produce tower tube segments of different diameters or shapes as needed, which is achieved by splicing different numbers of sheet inner molds 3. It is easier to manufacture, transport and install. If a piece of the inner mold 3 is damaged, the piece of inner mold 3 can be replaced individually without replacing the entire piece, reducing maintenance costs.

[0030] As another specific embodiment, the inner mold 3 is detachably connected to the upper sealing mold 6, the bottom mold 2 and the side mold 4. The inner mold 3 has a large area, and the detachably connected inner mold 3 can be easily opened, making the operation of placing the steel cage more flexible and convenient. After the concrete hardens, the inner mold 3 can be quickly disassembled to easily take out the manufactured pipe segment.

[0031] As another specific embodiment, the inner mold 3 is hinged to the mold support 1. The hinged structure allows the inner mold 3 to rotate relative to the mold support 1, which makes it more convenient to install and remove the inner mold 3.

[0032] As another specific embodiment, the inner mold 3 is flipped downward to open. The inner mold 3 rotates along the length direction of the lower sealing mold 5. Flipping downward to open does not require additional side space. Compared with the side or vertical opening method, flipping downward is usually more intuitive and simple to operate, reducing the complexity of operation. Due to the effect of gravity, the concrete tower segment is more easily separated from the inner mold 3 during the flipping process, thereby improving the demoulding efficiency.

[0033] As another specific implementation, the radial inner side of the inner mold 3 is provided with a grid reinforcement rib 7. The radial inner side is the side opposite to the pouring space, and the grid reinforcement rib 7 can significantly improve the overall strength and stability of the inner mold 3, so that it can better withstand pressure and prevent deformation during concrete pouring. The stress generated during concrete pouring is effectively evenly distributed to the entire inner mold 3, reducing local stress concentration, thereby improving the quality of the tower segment.

[0034] A method for improving the quality of tower segments, using the lying mold of the wind power concrete tower segment, pouring concrete into the mold body from the circumferential end face side parallel to the horizontal plane, exhausting from low to high, and the bubbles rise to the upper sealing part of the pouring port, that is, the circumferential end face on one side of the tower segment.

[0035] In this solution, the fan-shaped mold design makes the concrete flow direction match the mold shape during pouring. The mold body with one side high uses gravity to guide the flow of concrete. Concrete is poured from the higher side, and due to gravity, it will flow to the lower part of the mold. The pouring direction of concrete starts from the circumferential end face side parallel to the horizontal plane, and the exhaust path is from low to high. Due to gravity, bubbles and excess air will naturally rise. The design of the lying mold ensures that the exhaust path is unidirectional, that is, from the bottom to the top of the concrete pouring. This design allows bubbles to move in only one direction, and when the bubbles reach the highest point of the mold, that is, the circumferential end face of the tower segment, they can be discharged. If a mold body with equal height on both sides is used, there is no obvious gravity to guide the flow direction, and the end faces on both sides are in an inclined state, and pouring from one side cannot fill the entire mold body. Therefore, concrete needs to be poured from both sides at the same time, and this pouring method may cause the concrete to meet in the center of the mold, forming a flow "interface", which may become a gathering place for bubbles and air. And the bubbles are trapped in the center of the concrete and have difficulty rising to the surface of the mold. Without a clear high point as a venting point, bubbles will form inside the concrete and remain on the inner surface of the tower segment.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The present invention extends to any new features or any new combinations disclosed in this specification, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the detailed technical features not disclosed in this embodiment, such as specific structure, connection method, etc., can be obtained by those skilled in the art from the prior art, and the present disclosed embodiment does not specifically limit this.

Claims

1. A lying mold for a wind power concrete tower segment, characterized in that: The invention comprises a mould support (1), on which a mould body for producing tower segments is arranged, the cavity and shape of the mould body match the shape of the tower segments and are both fan-shaped, and one side circumferential end face of the mould body is a pouring port and is higher than the other side circumferential end face.

2. The lying mold for wind power concrete tower segments according to claim 1, characterized in that: The mold body comprises a bottom mold (2) corresponding to the outer diameter surface of the tower tube segment, an inner mold (3) corresponding to the inner diameter surface of the tower tube segment, a side mold (4) corresponding to the two axial end surfaces of the tower tube segment, and a lower sealing mold (5) and an upper sealing mold (6) corresponding to the two circumferential side surfaces of the tower tube segment, respectively. The upper sealing mold (6) is located at the highest point of the mold body.

3. The lying mold for wind power concrete tower segments according to claim 2, characterized in that: The upper sealing mold (6) is detachably connected to the bottom mold (2), the inner mold (3) and the side mold (4).

4. The lying mold for wind power concrete tower segments according to claim 2, characterized in that: The bottom mold (2) is fixedly connected to the mold support (1).

5. The lying mold for wind power concrete tower segments according to claim 2, characterized in that: The inner mold (3) is detachably connected to the upper sealing mold (6), the bottom mold (2) and the side mold (4).

6. The lying mold for wind power concrete tower segments according to claim 5, characterized in that: The inner mold (3) is a one-piece type, or a multi-piece type spliced ​​into one piece.

7. The lying mold for wind power concrete tower segments according to claim 5, characterized in that: The inner mold (3) is hinged to the mold support (1).

8. The lying mold for wind power concrete tower segments according to claim 7, characterized in that: The inner mold (3) is flipped downward and opened.

9. The lying mold for wind power concrete tower segments according to claim 2, characterized in that: The radial inner side surface of the inner mold (3) is provided with grid reinforcement ribs (7).

10. A method for improving the quality of tower segments, characterized in that: Using the lying mold for wind power concrete tower segments as described in any one of claims 1 to 9, concrete is poured into the mold body from the circumferential end face side parallel to the horizontal plane, exhaust is from low to high, and bubbles rise to the seal on the pouring port, that is, the circumferential end face on one side of the tower segment.

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