Horizontal two-dimensional directional steel fiber UHPC wind power tower drum ring piece preparation device and method

Abstract

The invention discloses a horizontal two-dimensional orientation steel fiber UHPC wind power tower drum ring piece preparation device and method, and relates to the technical field of wind power tower drum engineering. The device is mainly composed of an annular mold, an annular sliding rail, an electric sliding block, coils and a direct-current power source, the direct-current power source supplies power to the coils on the inner side and the outer side to generate a uniform and controllable magnetic field, the coils are driven by the electric sliding block to achieve synchronous annular rotation, the magnetic field intensity and the action time are adjusted according to different flowing degrees of UHPC mixtures, and therefore the UHPC mixtures can be manufactured. And under the action of a rotating magnetic field, the steel fibers form two-dimensional distribution in a horizontal plane. Compared with a traditional UHPC wind power tower drum, the horizontal two-dimensional directional steel fiber reinforced UHPC wind power tower drum produced by the device has the advantages that the compression bearing capacity is improved by 15%-20%, and the compression fatigue resistance is improved by 40%-50%. According to the tower drum structure, the thickness of the tower drum ring section can be reduced by 10%-20%, the dead weight of the tower drum and the consumption of raw materials are reduced, and the transportation and construction cost is reduced. The device is simple in design and convenient to disassemble and assemble, has efficient and reliable industrial production potential, and can be widely applied to manufacturing and optimization of wind power towers.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power tower engineering, and in particular to a device and method for preparing a horizontal two-dimensional oriented steel fiber UHPC wind power tower ring segment. Background Art

[0002] With the rapid development of the global wind energy industry, especially the rapid expansion of offshore wind power and large-scale onshore wind power projects, higher requirements are placed on the height and load-bearing capacity of wind turbine towers. Traditional steel-structured wind turbine towers have gradually shown certain limitations due to issues such as material costs, transportation restrictions, and the structural difficulty of high tower requirements. Concrete wind turbine towers have many unique advantages over steel towers, including low cost, convenient and efficient transportation and construction, and higher stability and durability. However, with the development of wind turbine towers in terms of height and size, ordinary concrete towers have also encountered a series of problems, such as large amount of concrete, heavy weight, easy fatigue damage, and insufficient load-bearing capacity.

[0003] In order to solve the above problems, "Zhang Lili. Research on wind vibration performance of hollow sandwich steel tube concrete composite wind power tower [D]. Lanzhou University of Technology, 2022.000920." proposed a new tower structure, specifically disclosing a hollow sandwich steel tube concrete tower. Due to the coordinated and complementary effect of the inner and outer steel tubes and the sandwich concrete, the composite component has higher bending stiffness and better stability. However, the manufacturing process of this structure is cumbersome, the process requirements are high, and the effect is not ideal. "Pang Kun. Research on static and fatigue performance of UHPC reinforced wind power tower steel-mixed transition section [D]. Chongqing Jiaotong University, 2024." It is proposed to outsource UHPC to the outside of the tower to improve the static and fatigue performance of the tower, but this method is only suitable for local reinforcement and is not suitable for large-scale application. "Zhang Xuesen, Wu Xiangguo, Li Dan, et al. Static and fatigue performance of assembled UHPC wind turbine tower under rated wind speed [J] Renewable Energy, 2022, 40(08): 1066-1072." It is proposed to use UHPC to prepare wind turbine towers. The addition of steel fibers inside UHPC can greatly improve the tower's bearing capacity and fatigue performance. However, the fibers in the traditional UHPC tower ring are randomly distributed in different directions, and not all directions of fibers play a reinforcing role, which will cause material waste and increase construction costs.

[0004] According to the stress characteristics of the wind turbine tower, the tower as a whole is under compression due to the action of prestressed steel bars. Therefore, the steel fibers are adjusted to a horizontal two-dimensional distribution. All steel fibers are randomly distributed perpendicular to the compressive load, and the horizontal two-dimensional directionally distributed steel fibers are perpendicular to the compressive load direction. This can provide higher crack resistance and toughness, thereby effectively inhibiting the initiation and propagation of cracks, improving the fiber reinforcement efficiency, and significantly improving the mechanical properties of the tower.

[0005] At present, the main fiber orientation methods include magnetic field orientation, flow induced orientation, 3D printing equipment orientation, etc. In previous studies, based on electromagnetic principles, unidirectional oriented steel fiber cement-based composites, two-dimensionally distributed steel fiber reinforced cement-based composites, and full-field aligned steel fiber reinforced cement-based composites were successfully prepared, which can maximize the fiber reinforcement efficiency and significantly improve the mechanical properties of steel fiber cement-based composites. However, most of these methods are in the experimental research stage, and their orientation equipment is not suitable for actual industrial production. It is urgent to invent a horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring preparation device and method suitable for actual production. Summary of the invention

[0006] The purpose of the present invention is to propose a horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device to solve the problems raised in the background technology. The horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segment prepared by the present invention has internal steel fibers that are randomly distributed perpendicular to the compression load, which can provide higher crack resistance and toughness, thereby effectively inhibiting the initiation and expansion of cracks, improving the fiber reinforcement efficiency, and limiting the deformation of the tower to the greatest extent, significantly improving the tower bearing capacity.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] A horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device, including a ring mold, a ring slide rail, an electric slide, a coil and a DC power supply;

[0009] The annular mold comprises an outer ring and an inner ring;

[0010] The annular slide rail comprises an outer slide rail and an inner slide rail, wherein the outer slide rail is arranged on the outer side of the outer ring, and the inner slide rail is arranged on the inner side of the inner ring;

[0011] The electric slider comprises an outer slider and an inner slider, wherein the outer slider is slidably mounted on the outer slide rail, and the inner slider is slidably mounted on the inner slide rail;

[0012] The coil comprises an outer coil and an inner coil, wherein the outer coil and the inner coil are respectively arranged on the outer slider and the inner slider;

[0013] The DC power supply is electrically connected to the coil.

[0014] Preferably, the annular mold, the annular slide rail and the electric slider are made of non-magnetic materials, and threaded holes are provided at the connection between the annular mold, the annular slide rail and the coil, and the connection is fixed by bolts.

[0015] Preferably, the speed adjustment range of the electric slider is: 5 to 20 s / turn; when the outer slider and the inner slider rotate, they rotate synchronously with the corresponding outer coil and the inner coil.

[0016] Preferably, the outer coil and the inner coil have the same number of turns, wherein the number of turns of the coil ranges from 100 to 500, the coil height is 0.5 to 1.5 m, and the coil width is 0.5 to 1.5 m; the outer coil and the inner coil are positioned front to back, and the coil wire is wound by an insulating coated conductive wire, and the insulating coated conductive wire is a copper wire with a diameter of 0.5 to 2.2 mm, and an insulating layer is coated on its surface.

[0017] Preferably, the DC power supply is used to adjust the voltage and current. The DC power supply has three adjustment knobs a, b, and c, which respectively adjust the voltage, current, and magnetic field action time. After the coil is connected to the DC power supply, a uniform magnetic field is generated; according to the fluidity and viscous resistance of the UHPC mixture, the magnetic field intensity and action time are adjusted to adjust the fiber direction, which specifically includes the following contents:

[0018] The magnetic induction intensity inside the energized solenoid is calculated based on the Biot-Savart law. The specific calculation formula is:

[0019] B=μ0NI

[0020] In the formula, B represents the magnetic induction intensity, μ0 represents the vacuum magnetic permeability, N represents the number of turns of the outer coil of the energized solenoid, and I represents the current of the closed loop of the energized solenoid;

[0021] The magnetic field strength can be controlled by controlling the voltage and current.

[0022] After applying a uniform magnetic field, the magnetic field provides a driving force to rotate the steel fiber. During the rotation process, a viscous resistance is generated between the steel fiber and the matrix. The magnetic field driving force on the steel fiber overcomes the viscous resistance of the concrete and rotates the steel fiber to the designed direction. The calculation formulas for the magnetic field driving force and the viscous resistance are as follows:

[0023]

[0024] Where f1 represents the magnetic field driving force, f2 represents the viscous resistance, B represents the magnetic induction intensity, μ0 represents the vacuum magnetic permeability, S represents the area of ​​the magnetic field and the magnetic conductive material action surface, η represents the viscosity coefficient of the viscous cement paste, l represents the steel fiber length; v represents the steel fiber movement speed, l x represents the length of the steel fiber at a distance x from the centroid of the steel fiber, and d represents the diameter of the steel fiber;

[0025] Based on the momentum theorem, the rotation speed and position of the steel fiber can be calculated based on the magnetic field force component and viscous resistance. The specific calculation formula is:

[0026]

[0027] In the formula, m represents the mass of the steel fiber. According to the above formula, the rotational angular acceleration of the steel fiber at the time t when the steel fiber overcomes the viscous resistance of the UHPC mixture with a viscosity of η under the action of the magnetic field with a magnetic induction intensity of B is calculated;

[0028] It is known that the maximum rotation angle required to orient the steel fibers in the tower ring segment to the horizontal direction is 90 degrees. This is used to calculate the time required for the steel fibers to rotate 90 degrees under a certain magnetic induction intensity. According to the different fluidity and viscous resistance of the UHPC mixture cast on site, the magnetic field intensity and action time are adjusted to achieve regulation of the fiber direction.

[0029] Further protection is provided for a method for preparing a horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment based on the above device, comprising the following steps:

[0030] S1. Prepare a UHPC mixture, wherein the UHPC mixture is prepared by a certain mix ratio of cementitious material, steel fiber, water reducing agent, and water, wherein the cementitious material includes cement, silica fume, fly ash, and mineral powder, and the steel fiber has a diameter of 0.18 to 0.23 mm, a length of 10 to 50 mm, and a volume content of 1.5% to 2.5%;

[0031] S2. Test the viscosity coefficient of the UHPC mixture, and calculate the required magnetic field strength and magnetic field action time according to the fluidity and viscosity resistance of the UHPC mixture;

[0032] S3. Pour the prepared fresh mixture into the mold and vibrate for 15-20 seconds. Vibrate the inside evenly so that the concrete surface is flush with the test mold height.

[0033] S4, adjust the electric slider to make it rotate evenly around the slide rail, and the outer and inner coils of the mold rotate synchronously and periodically under the drive of the slider;

[0034] S5. Turn on the DC power supply and adjust the current to make the magnetic field intensity within a suitable range; vibrate the UHPC mixture so that the UHPC is under the action of the rotating magnetic field for a certain period of time, so that the steel fibers in the mixture rotate to the horizontal direction and are distributed in two dimensions in the horizontal plane, thereby achieving steel fiber orientation;

[0035] S6. After fiber orientation is achieved, turn off the power supply, and remove the mold after the tower ring segment is cured indoors for 24 hours. Then move the ring segment into a standard curing room and cure it for 28 days or steam cure it for 2-3 days. The preparation of the horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segment is completed.

[0036] Compared with the prior art, the present invention provides a device and method for preparing a horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment, which has the following beneficial effects:

[0037] (1) The present invention uses the principle of magnetic field rotation orientation to prepare horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segments. The steel fibers in the tower are horizontally distributed in two dimensions, which significantly improves the fiber reinforcement efficiency and the mechanical properties of the tower.

[0038] (2) When the wind turbine tower is working normally, the tower as a whole is under compression due to the action of prestressed steel bars. The horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower prepared by the present invention has its internal steel fibers randomly distributed perpendicular to the compressive load. The horizontal two-dimensional oriented steel fibers are perpendicular to the compressive load direction, which can provide higher crack resistance and toughness, thereby effectively inhibiting the initiation and expansion of cracks, improving the fiber reinforcement efficiency, and limiting the deformation of the tower to the greatest extent, significantly improving the tower bearing capacity.

[0039] (3) The horizontal two-dimensional directional steel fiber reinforced UHPC wind turbine tower produced by the present invention has a compressive bearing capacity increased by 15%-20% and a compressive fatigue performance increased by 40%-50% compared with the conventional randomly distributed steel fiber UHPC tower.

[0040] (4) The horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower produced by the present invention can reduce the thickness of the tower ring segment by 10%-20% under the same material performance requirements, reduce the tower weight and raw material consumption, and reduce transportation and construction costs.

[0041] (5) The horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device proposed in the present invention has a simple design, is easy to disassemble and assemble, has the potential for efficient and reliable industrial production, and can be widely used in the manufacture and optimization of wind turbine towers. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings involved in the embodiments are briefly introduced. Obviously, the drawings in the following description are only schematic illustrations of some embodiments of the present invention. For those skilled in the art, other forms of drawings can also be constructed based on these drawings without creative work.

[0043] Figure 1 It is a schematic diagram of the overall structure of the device for preparing the horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment mentioned in the embodiment of the present invention;

[0044] Figure 2 It is a top view of the positions of the inner and outer sliders mentioned in the embodiment of the present invention;

[0045] Figure 3 A three-dimensional diagram of the positions of the inner and outer coils mentioned in an embodiment of the present invention;

[0046] Figure 4 is a fiber orientation principle diagram mentioned in an embodiment of the present invention; wherein, Figure 4 (a) is the force diagram of steel fiber in magnetic field; Figure 4 (b) is the principle diagram of horizontal two-dimensional orientation of steel fiber under the action of rotating magnetic field;

[0047] Figure 5 A schematic diagram of a DC power supply in an embodiment of the present invention;

[0048] Figure 6 is a cross-sectional view of the annular slide rail mentioned in an embodiment of the present invention;

[0049] Figure 7 This is a fiber distribution diagram in a horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segment mentioned in an embodiment of the present invention;

[0050] Figure 8 (a) and (b) are the statistical results of compression test and fatigue test, respectively, where 2D is a horizontal two-dimensional oriented UHPC specimen, and RD is a randomly oriented steel fiber UHPC specimen.

[0051] Description of the numbers in the figure:

[0052] 1. Annular mold; 101. Outer ring; 102. Inner ring; 2. Annular slide rail; 201. Outer slide rail; 202. Inner slide rail; 3. Electric slider; 301. Outer slider; 302. Inner slider; 4. Coil; 401. Outer coil; 402. Inner coil; 5. DC power supply. DETAILED DESCRIPTION

[0053] The following is a clear and comprehensive description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that the embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] The present invention proposes a device for preparing horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segments. By controlling the magnetic field intensity and the magnetic field action time, the horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segments can be effectively prepared. Because the steel fibers inside are randomly distributed perpendicular to the compression load, they can provide higher crack resistance and toughness, thereby effectively inhibiting the initiation and expansion of cracks, improving the fiber reinforcement efficiency, limiting the deformation of the tower to the greatest extent, and significantly improving the bearing capacity of the tower.

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more clear, the technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] Embodiment 1:

[0057] like Figure 1 As shown, the present invention proposes a horizontal two-dimensional oriented steel fiber UHPC wind tower ring segment preparation device, which is mainly composed of an annular mold 1, an annular slide rail 2, an electric slider 3, a coil 4 and a DC power supply 5; the annular mold 1 includes an outer ring 101 and an inner ring 102; the annular slide rail 2 includes an outer slide rail 201 and an inner slide rail 202; the electric slider 3 includes an outer slider 301 and an inner slider 302; the coil 4 includes an outer coil 401 and an inner coil 402;.

[0058] The inner slide rail 202 and the outer slide rail 201 are respectively arranged on the inner and outer sides of the annular mold 1, and the upper sides of the inner slide rail 202 and the outer slide rail 201 are flush with the upper edge of the annular mold 1, and the lower sides of the inner slide rail 202 and the outer slide rail 201 are flush with the lower edge of the annular mold 1. The inner slide rail 202 and the outer slide rail 201 are respectively installed with an inner slider 302 and an outer slider 301. The positions of the inner slider 302 and the outer slider 301 correspond to each other front and back. The top view of the position is as shown in FIG. Figure 2 The inner slider 302 and the outer slider 301 are respectively provided with an inner coil 402 and an outer coil 401, and the positions of the inner coil 402 and the outer coil 401 are parallel and correspond to each other. Figure 3 As shown. Driven by the electric slider 3, the coil 4 can perform synchronous periodic circular operation. When the coil 4 is connected to the DC power supply 5, a uniform magnetic field can be generated and the coil 4 rotates at a certain speed. Under the action of the magnetic field, the steel fibers inside the annular mold 1 can be horizontally oriented in two dimensions. The principle is as follows: Figure 4 shown.

[0059] The coils 4 are wound by insulating coated conductive wires, each coil 4 has the same specification and number of turns, and the height of the coils 4 is consistent with that of the annular mold 1.

[0060] The DC power supply 5 can adjust the voltage, current and action time through buttons, thereby controlling the magnetic induction intensity and magnetic field action time in the coil 4.

[0061] The electric slider 3 moves in a circular direction on the annular slide rail 2, and the speed can be adjusted and the synchronous rotation can be performed. Driven by the electric slider 3, the outer coil 401 and the inner coil 402 synchronously perform periodic reciprocating rotation. The electric slider 3 slides in contact with the inside of the annular slide rail 2 through the roller, and the cross section is as follows: Figure 6 The coil 4 is driven by the electric slider 3 to rotate periodically, and the steel fibers in the tower ring are horizontally distributed in two dimensions under the action of the rotating magnetic field. Figure 7 .

[0062] Bolts are arranged at the connection points of the annular mold 1, the annular slide rail 2 and the coil 4, so that the annular mold 1, the outer slide rail 201 and the electric slider 3 are all made of non-magnetic alloy material.

[0063] The horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring is prepared by using the above device, including the following steps:

[0064] The first step is to prepare the UHPC mixture, which is made of cementitious materials, steel fibers, water reducers, and water in a certain proportion. The cementitious materials include cement, silica fume, fly ash, and mineral powder. The steel fibers have a diameter of 0.2, a length of 13 mm, and a volume content of 2%.

[0065] The second step is to test the viscosity coefficient of the UHPC mixture and calculate the required magnetic field strength and magnetic field action time according to the fluidity and viscosity resistance of the UHPC mixture.

[0066] Step 3: Pour the fresh mixture into the annular mold 1 and vibrate for 15-20 seconds. Vibrate the inside evenly so that the concrete surface is basically flush with the test mold height.

[0067] The fourth step is to adjust the electric slider 3 , so that the electric slider 3 rotates evenly around the annular slide rail 2 , and the outer coil 401 and the inner coil 402 on the annular mold 1 rotate synchronously and periodically under the drive of the electric slider 3 .

[0068] Step 5: Turn on the DC power supply 5, adjust the current to make the magnetic field magnetic induction intensity within a suitable range, and adjust the magnetic field action time. Vibrate the UHPC mixture so that the UHPC is under the action of the rotating magnetic field for a certain period of time, so that the steel fibers in the mixture rotate to the horizontal direction and are distributed in two dimensions in the horizontal plane, thereby achieving steel fiber orientation.

[0069] Step 6. After fiber orientation is achieved, turn off the DC power supply 5, remove the mold after the tower ring segment is cured indoors for 24 hours, and then move the ring segment into a standard curing room for curing for 28 days or steam curing for 2-3 days. The preparation of the horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segment is completed.

[0070] Based on the above content, a comparative experiment was designed to conduct compression test and fatigue test on the prepared horizontal two-dimensional oriented steel fiber reinforced UHPC and random steel fiber UHPC materials. The specific test results are as follows Figure 7 As shown, Figure 8 (a) and (b) are the statistical results of compressive test and fatigue test of horizontal two-dimensional oriented UHPC material (2D) and randomly oriented steel fiber UHPC material (RD), respectively. It can be seen that compared with traditional UHPC, the compressive bearing capacity and fatigue performance of horizontal two-dimensional oriented steel fiber UHPC are significantly improved.

[0071] The horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower produced by this device has a 15%-20% increase in compressive bearing capacity and a 40%-50% increase in compressive fatigue performance compared to the traditional randomly distributed steel fiber UHPC tower. Under the same material performance requirements, the horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower structure can reduce the thickness of the tower ring section by 10%-20%, reduce the tower's own weight and raw material consumption, and reduce transportation and construction costs.

[0072] The remaining technical features in this embodiment can be flexibly selected by those skilled in the art according to actual conditions to meet different specific practical needs. However, it is obvious to those of ordinary skill in the art that it is not necessary to adopt these specific details to implement the present invention. In other examples, in order to avoid confusing the present invention, the composition, structure or components of the formula are not specifically described, and they are all within the technical protection scope defined by the technical solution claimed for protection in the claims of the present invention.

[0073] Modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the scope of protection of the claims attached to the present invention. In the above description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details are not necessary to practice the present invention. In other examples, in order to avoid confusing the present invention, well-known technologies, such as specific construction details, operating conditions and other technical conditions, are not specifically described.

[0074] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device, characterized in that: It comprises an annular mold (1), an annular slide rail (2), an electric slide block (3), a coil (4) and a direct current power supply (5); The annular mold (1) comprises an outer ring (101) and an inner ring (102); The annular slide rail (2) comprises an outer slide rail (201) and an inner slide rail (202), wherein the outer slide rail (201) is arranged on the outer side of the outer ring (101), and the inner slide rail (202) is arranged on the inner side of the inner ring (102); The electric slider (3) comprises an outer slider (301) and an inner slider (302), wherein the outer slider (301) is slidably mounted on the outer slide rail (201), and the inner slider (302) is slidably mounted on the inner slide rail (202); The coil (4) comprises an outer coil (401) and an inner coil (402), wherein the outer coil (401) and the inner coil (402) are respectively arranged on the outer slider (301) and the inner slider (302); and the DC power supply (5) is electrically connected to the coil (4).

2. The horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device according to claim 1 is characterized in that: The annular mold (1), the annular slide rail (2), and the electric slider (3) are made of non-magnetic materials. The connection between the annular mold (1), the annular slide rail (2), and the coil (4) is provided with threaded holes, and the connection is fixed by bolts.

3. The horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device according to claim 1 is characterized in that: The rotation speed adjustment range of the electric slider (3) is 5 to 20 seconds per revolution; when the outer slider (301) and the inner slider (302) rotate, they rotate synchronously with the corresponding outer coil (401) and the inner coil (402).

4. The horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device according to claim 1 is characterized in that: The outer coil (401) and the inner coil (402) have the same number of turns, wherein the number of turns of the coil ranges from 100 to 500, the coil height is 0.5 to 1.5 m, and the coil width is 0.5 to 1.5 m; the outer coil (401) and the inner coil (402) are positioned front to back, and the coil wire is wound by insulating coated conductive wire, wherein the insulating coated conductive wire is a copper wire with a diameter of 0.5 to 2.2 mm and a surface coated with an insulating layer.

5. The horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment preparation device according to claim 1 is characterized in that: The DC power supply (5) is used to adjust the voltage and current, and comprises three adjustment knobs a, b and c, which are respectively used to adjust the voltage, current and magnetic field action time; the coil (4) generates a uniform magnetic field after being connected to the DC power supply (5); according to the fluidity and viscous resistance of the UHPC mixture, the intensity and action time of the electromagnetic field are adjusted by the DC power supply (5), so as to adjust the fiber direction.

6. The method for preparing horizontal two-dimensional oriented steel fiber UHPC wind turbine tower ring segment realized by the device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Prepare a UHPC mixture, wherein the UHPC mixture is prepared by a certain mix ratio of cementitious material, steel fiber, water reducing agent, and water, wherein the cementitious material includes cement, silica fume, fly ash, and mineral powder, and the steel fiber has a diameter of 0.18 to 0.23 mm, a length of 10 to 50 mm, and a volume content of 1.5% to 2.5%; S2. Test the viscosity coefficient of the UHPC mixture, and calculate the required magnetic field strength and magnetic field action time according to the fluidity and viscosity resistance of the UHPC mixture; S3, pour the prepared fresh mixture into the annular mold (1), vibrate for 15-20 seconds, and vibrate the inside evenly so that the concrete surface is flush with the test mold height; S4, regulating the electric slider (3) so that it rotates evenly around the annular slide rail (2), and the outer coil (401) and the inner coil (402) rotate synchronously and periodically under the drive of the electric slider (3); S5, turning on the DC power supply (5), adjusting the current to make the magnetic field intensity within a suitable range, and adjusting the magnetic field action time; vibrating the UHPC mixture so that the UHPC is under the action of the rotating magnetic field for a certain period of time, so that the steel fibers in the mixture rotate to a horizontal direction and are distributed two-dimensionally in the horizontal plane, thereby achieving steel fiber orientation; S6. After the fiber orientation is achieved, the DC power supply (5) is turned off, the tower ring segment is cured indoors with a mold for 24 hours and then removed from the mold. The ring segment is then moved into a standard curing room for curing for 28 days or steam cured for 2-3 days. The preparation of the horizontal two-dimensional oriented steel fiber reinforced UHPC wind turbine tower ring segment is completed.

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