Manufacturing molds and construction methods for concrete transition sections of wind turbine towers

Abstract

This invention relates to the field of wind turbine tower manufacturing technology, and discloses a manufacturing mold and construction method for a concrete transition section of a wind turbine tower. The mold includes: a mold platform, a bottom mold, an inner mold, an outer mold, an adjustable horizontal support rod, and a sliding structure. The bottom mold is installed on the mold platform. Several inner mold sub-modules are arranged in a ring to form an annular inner mold. The outer mold is installed on the mold platform and includes several outer mold sub-modules arranged in a ring to fit the edge of the bottom mold. The adjustable horizontal support rod is installed on the inner mold, with its two ends abutting against two opposite inner mold sub-modules. The sliding structure is installed on the mold platform and is used to move the outer mold modules away from the center of the mold platform. During demolding, the movement direction of the above structure is perpendicular to the inner surface of the concrete, which can minimize the risk of localized cracking and spalling of the inner surface of the concrete during demolding, ensuring the integrity of the concrete transition section after demolding.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower manufacturing technology, specifically to the manufacturing mold and construction method for the concrete transition section of a wind turbine tower. Background Technology

[0002] Currently, precast concrete wind turbine towers commonly use concrete transition sections to connect with the upper steel tower or main unit. At the same time, prestressed steel strands need to be applied from the concrete transition section to ensure that the lower concrete tower is under pressure. As the rigid-flexible transition area of ​​the entire tower, the load-bearing performance of the transition section is crucial to the safety of the entire tower. It is very necessary to design the mold for its manufacture in a refined manner. Through reasonable mold structure and concrete pouring and demolding processes, the compactness of the concrete transition section can be guaranteed.

[0003] The structural form of the transition section is very complex. Its main components, anchor bolts and steel strands, contain a large number of embedded components. At the same time, the anchor bolt and steel strand embedded components have high requirements for their positional accuracy. It is very necessary to control the positioning accuracy of the concrete embedded components to minimize quality problems such as disturbance of the embedded components during the pouring process. At the same time, it is also necessary to control the demolding quality of the concrete transition section to reduce the demolding difficulty of large-volume irregular concrete components. Summary of the Invention

[0004] In view of this, the present invention provides a manufacturing mold and construction method for a concrete transition section of a wind turbine tower, in order to solve the problems that the anchor bolt embedded parts and steel strand embedded parts have high requirements for their positional accuracy, and it is very necessary to control the positioning accuracy of the concrete embedded parts to minimize quality problems such as disturbance of the embedded parts during the pouring process; at the same time, it is also necessary to control the demolding quality of the concrete transition section and reduce the demolding difficulty of large-volume irregular concrete components.

[0005] In a first aspect, the present invention provides a manufacturing mold for a concrete transition section of a wind turbine tower, comprising:

[0006] mold table;

[0007] The bottom mold is mounted on the mold platform;

[0008] An inner mold is installed on the bottom mold. The inner mold includes several inner mold sub-modules, which are arranged in a ring to form an annular inner mold.

[0009] An outer mold is mounted on the mold platform. The outer mold includes several outer mold sub-modules, which are arranged in a ring around the edge of the bottom mold.

[0010] The system also includes an adjustable horizontal support rod and a sliding structure. The adjustable horizontal support rod is installed on the inner mold, and its two ends abut against two opposite inner mold sub-modules. The sliding structure is installed on the mold platform and is used to drive the outer mold sub-module to move away from the center of the mold platform.

[0011] Beneficial effects: By setting adjustable horizontal support rods with threaded sleeves between the second inner mold sub-modules of the second mold section, the distance between the two relative second inner mold sub-modules can be quickly adjusted, improving the demolding efficiency between the second mold section and the inner surface of the concrete; at the same time, since the movement direction of the second mold section during the demolding process is perpendicular to the inner surface of the concrete, the risk of local cracking and block falling off of the inner surface of the concrete during the demolding process can be minimized, ensuring the integrity of the concrete transition section after demolding.

[0012] The outer mold module adopts a sliding rail movement method, which can drive the outer mold module away from the center of the mold platform to achieve the demolding of the outer mold. When pouring concrete, the sliding rail movement method drives the outer mold module to move closer to the center of the mold platform, which can achieve a tight fit between the outer mold module and the outer edge of the bottom mold, and prevent concrete leakage.

[0013] In one optional implementation, the sliding structure is configured in a one-to-one correspondence with the outer mold sub-module;

[0014] The sliding structure includes:

[0015] A slide rail is mounted on the mold platform along the radial direction of the bottom mold;

[0016] A sliding bracket is mounted on the slide rail and is connected to the corresponding outer mold sub-module.

[0017] In one optional embodiment, the inner mold includes a first mold segment and a second mold segment, the first mold segment being mounted on the bottom mold, and the second mold segment being coaxially mounted on the top of the first mold segment;

[0018] The first module segment includes several first inner mold sub-modules, which are arranged in a ring to form the first module segment.

[0019] The second module segment includes at least two pairs of second inner mold sub-modules, which are arranged in a ring-shaped staggered manner to form the second module segment.

[0020] In one alternative implementation, any pair of the second inner mold sub-modules are arranged opposite each other;

[0021] Furthermore, along the circumferential direction of the second module segment, the arc lengths of two adjacent second inner module segments are different.

[0022] In one alternative implementation, a plurality of first steel strand pre-embedded part positioning fixtures are provided on the first module segment.

[0023] Beneficial effects: By setting the positioning fixture for the first steel strand embedded part on the first mold section, the spatial intersection problem between the steel strand embedded part and the truncated cone-shaped first mold section is effectively avoided, and the problem of grout leakage between the steel strand embedded part and the truncated cone-shaped first mold section is solved; at the same time, the verticality of the steel strand embedded part during the pouring process is ensured, and the lower end of the steel strand embedded part is prevented from being disturbed during concrete pouring. Furthermore, the demolding difficulty of the concrete transition section is greatly reduced.

[0024] In one alternative embodiment, the manufacturing mold for the concrete transition section of the wind turbine tower further includes a cantilever positioning structure;

[0025] The cantilever positioning structure includes:

[0026] The cantilevered fixture body is ring-shaped and fixed to the top of the outer mold and the inner mold.

[0027] Mounting rods, wherein a plurality of mounting rods are provided, and at least some of the mounting rods are arranged alternately on the cantilever fixture body;

[0028] An anchor bolt fixing fixture is installed on the cantilever fixture body;

[0029] The second steel strand pre-embedded part positioning fixture has its inner ring connected to the cantilever fixture body and its outer ring connected to the anchor bolt fixing fixture.

[0030] Beneficial effects: By setting up a cantilever positioning structure, the precise positioning and installation of the anchor bolt components and steel strand embedded parts are achieved, which greatly improves the positional accuracy of the anchor bolt connectors and prestressed steel strands in the concrete transition section and reduces the difficulty of connecting the anchor bolts and flanges in actual projects.

[0031] In one optional embodiment, the device further includes a steel strand pre-embedded component, the two ends of which are respectively installed in the first steel strand pre-embedded component positioning fixture and the second steel strand pre-embedded component positioning fixture.

[0032] In one alternative implementation, the mounting rod is also provided with lifting lugs.

[0033] In one alternative embodiment, the manufacturing mold for the concrete transition section of the wind turbine tower includes a bracing structure connected to the first mold section to support it.

[0034] Beneficial effects: The diagonal bracing structure includes fixed reinforcing diagonal braces and adjustable reinforcing diagonal braces. The fixed reinforcing diagonal braces are rod-shaped, while the adjustable reinforcing diagonal braces can be threaded telescopic rods. One end of each brace is fixed to the bottom mold, and the other end is fixed to the side of the first inner mold sub-module to support the first mold section, thus strengthening the structural rigidity of the first mold section and preventing deformation during casting. The fixed reinforcing diagonal braces support the fixed parts of the first mold section, while the adjustable reinforcing braces support specific locations within the first mold section. The adjustable horizontal support rods are threaded telescopic rods, with both ends abutting against two opposite second inner mold sub-modules. Two adjustable horizontal support rods are installed on each pair of second inner mold sub-modules to strengthen the structural rigidity of the second mold section and prevent deformation during casting.

[0035] A construction method for manufacturing a concrete transition section mold for a wind turbine tower includes the following steps: assembling a first mold section and a second mold section, fixing the second mold section onto the first mold section, and installing an adjustable horizontal support rod on the second mold section; pre-installing a cantilever positioning structure, and hoisting and placing the cantilever positioning structure onto the inner mold; positioning and binding the internal steel reinforcement cage, and installing the outer mold using a sliding structure; pouring and curing concrete inside the mold; dismantling the cantilever positioning structure, the outer mold, and the inner mold; and removing the positioning fixture for the first steel strand embedded part. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is an isometric view of the manufacturing mold for the concrete transition section of the wind turbine tower according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the internal structure of the mold for manufacturing the concrete transition section of a wind turbine tower according to an embodiment of the present invention, excluding the outer mold.

[0039] Figure 3 This is a longitudinal sectional view of the manufacturing mold for the concrete transition section of the wind turbine tower according to an embodiment of the present invention;

[0040] Figure 4 This is a top view of the cantilever positioning structure according to an embodiment of the present invention;

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Mold table;

[0043] 2. Bottom mold;

[0044] 3. Inner mold; 31. First mold section; 32. Second mold section; 33. Positioning fixture for the first steel strand embedded part;

[0045] 4. Outer mold; 41. Operating platform; 42. Platform steel ladder;

[0046] 5. Adjustable horizontal support rod;

[0047] 6. Sliding structure; 61. Slide rail; 62. Sliding bracket;

[0048] 7. Diagonal bracing structure; 71. Fixed reinforced diagonal bracing; 72. Adjustable reinforced diagonal bracing;

[0049] 8. Cantilever positioning structure; 81. Cantilever fixture body; 82. Installation rod; 83. Lifting lug; 84. Anchor bolt fixing fixture; 85. Positioning fixture for the second steel strand embedded part;

[0050] 9. Embedded parts for steel strands. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Currently, precast concrete wind turbine towers commonly use concrete transition sections to connect to the upper steel tower or main unit. Prestressed steel strands are applied from the concrete transition section to ensure the lower concrete tower is under compression. As the rigid-flexible transition zone of the entire tower, the load-bearing capacity of the transition section is crucial to the safety of the entire tower. Therefore, it is essential to meticulously design its molds, ensuring the compactness of the concrete transition section through reasonable mold structure and concrete pouring and demolding processes. The structural form of the transition section is very complex, with its main components, anchor bolts and steel strands, containing numerous embedded components. The anchor bolt and steel strand embedded parts require high positional accuracy, necessitating precise control over the positioning of the concrete embedded parts to minimize quality problems such as disturbance during pouring. Simultaneously, it is also necessary to control the demolding quality of the concrete transition section to reduce the difficulty of demolding large, irregular concrete components.

[0053] To solve the above technical problems, the following will be combined with... Figures 1 to 4 The following describes embodiments of the present invention.

[0054] According to an embodiment of the present invention, in one aspect, a manufacturing mold for a concrete transition section of a wind turbine tower is provided, including a mold platform 1, a bottom mold 2, an inner mold 3, an outer mold 4, a horizontal support rod, a sliding structure 6, a diagonal bracing structure 7, and a cantilever positioning structure 8.

[0055] like Figures 1 to 3 As shown, the mold platform 1 can be of any shape; in this embodiment, it is rectangular and laid horizontally on the ground. The bottom mold 2 in this embodiment is circular and is horizontally mounted on the mold platform 1. The bottom mold 2 and the mold platform 1 can be fixedly connected by welding or bolts.

[0056] like Figures 1 to 3 As shown, the outer mold 4 includes several outer mold sub-modules. Each outer mold sub-module is an upright arc-shaped plate. The bottom inner sides of the several arc-shaped outer mold sub-modules are arranged in a ring to fit against the outer edge of the bottom mold 2, forming a sleeve-shaped outer mold 4. Any two adjacent outer mold sub-modules are tightly fitted together and can be connected by bolts. Each outer mold sub-module is equipped with a corresponding sliding structure 6. Taking one sliding structure 6 as an example, its specific structure includes a slide rail 61 and a sliding bracket 62. The slide rail 61 is set on the mold table 1 along the radial direction of the bottom mold 2. A groove can be opened on the mold table 1, and the slide rail 61 is installed in the groove. The sliding bracket 62 is installed on the corresponding slide rail 61 and can move along the radial direction of the bottom mold 2 within the corresponding slide rail 61. The sliding bracket 62 is placed vertically, and the inner side of the vertical section can be bolted to the outer mold sub-module. The sliding bracket 62 can drive the outer mold module to move towards or away from the center of the mold table 1. The outer mold module adopts a sliding rail movement method, which can move the outer mold module away from the center of the mold platform 1 to achieve demolding of the outer mold 4. During demolding, the movement direction is perpendicular to the inner surface of the concrete, which can minimize the risk of local cracking and spalling of the inner surface of the concrete during demolding, ensuring the integrity of the concrete transition section after demolding. Before pouring concrete, the sliding rail movement method can be used to move the outer mold module closer to the center of the mold platform 1 to achieve a tight fit between the outer mold module and the outer edge of the bottom mold 2, preventing concrete leakage. An additional limiting device can also be installed to achieve a tight fit between the outer mold module and the outer edge of the bottom mold 2.

[0057] like Figures 1 to 3 As shown, the outer mold 4 is also equipped with an operating platform 41 and a platform steel ladder 42, which can be used by staff to stand.

[0058] like Figures 1 to 3As shown, the inner mold 3 includes a first mold segment 31 and a second mold segment 32 placed vertically. The first mold segment 31 is mounted on the bottom mold 2, and the second mold segment 32 is fixedly mounted on the top of the first mold segment 31 by bolts. The first mold segment 31 is a frustum-shaped sleeve mold that is narrower at the top and wider at the bottom, and the second mold segment 32 is a sleeve mold. The shape and size of the inner and outer diameters of the first mold segment 31 are the same as the shape and size of the inner and outer diameters of the top of the second mold segment 32. The first mold segment 31 includes several first inner mold sub-modules. Along the circumferential direction of the first mold segment 31, the first inner mold sub-modules are arc-shaped. In the height direction, the first inner mold sub-modules gradually tilt towards the center of the first mold segment 31 from top to bottom. Several first inner mold sub-modules are arranged in a ring to form the sleeve-shaped first mold segment 31. The bottom end of the first mold segment 31 is fixed to the bottom mold 2 by bolts. The second module segment 32 includes at least two pairs of second inner mold sub-modules. Each pair of second inner mold sub-modules has two pieces. The second inner mold sub-modules are vertical molds, and along the circumferential direction of the second module segment 32, the second inner mold sub-modules are arc-shaped. In this embodiment, there are two pairs of second inner mold sub-modules. The two second inner mold sub-modules in each pair have the same size, while the height of the second inner mold sub-modules in different pairs is the same, but the arc length is different. The arc length is the length of the outer surface of the second inner mold sub-module in the axial direction of the second module segment, which is equal to the length of the outer surface of the second inner mold sub-module in the second module segment. Figure 1 The outer arc lengths of the upper surface of the second inner mold sub-module are equal. Two pairs of second inner mold sub-modules are arranged in a staggered circumferential manner to form the second module segment 32. Each pair of second inner mold sub-modules is arranged in a centrally symmetrical manner. Adjacent second inner mold sub-modules are connected by bolts. Each second inner mold sub-module is fixed to the first module segment 31 below by bolts.

[0059] By setting adjustable horizontal support rods 5 with threaded sleeves between the second inner mold sub-modules of the second mold section 32, not only can the second inner mold sub-modules be supported from the inside to prevent the second mold section from shifting during concrete pouring, but the distance between the two relative second inner mold sub-modules can also be quickly adjusted, improving the demolding efficiency between the second mold section 32 and the inner surface of the concrete. At the same time, since the movement direction of the second mold section 32 during the demolding process is perpendicular to the inner surface of the concrete, the risk of local cracking and spalling of the inner surface of the concrete during the demolding process can be minimized, ensuring the integrity of the concrete transition section after demolding.

[0060] By setting up a split outer mold 4 and inner mold 3, and using bolt connections between the outer mold sub-modules and the inner mold sub-modules, the installation accuracy and efficiency between the modules are improved. At the same time, the inner mold 3 and outer mold 4 are cleverly equipped with adjustable horizontal support rods 5 and sliding structures 6, which realizes the demolding of each module from the internal concrete, greatly improving the demolding efficiency.

[0061] By setting the first steel strand embedded part positioning fixture 33 on the first mold section 31, the spatial intersection problem between the steel strand embedded part 9 and the frustum-shaped first mold section 31 is effectively avoided, and the problem of grout leakage between the steel strand embedded part 9 and the frustum-shaped first mold section 31 is solved; at the same time, the verticality of the steel strand embedded part 9 during the pouring process is ensured, and the lower end of the steel strand embedded part 9 is prevented from being disturbed during the concrete pouring process. It also greatly reduces the demolding difficulty of the concrete transition section.

[0062] like Figure 3 As shown, the diagonal bracing structure 7 includes a fixed reinforcing diagonal brace 71 and an adjustable reinforcing diagonal brace 72. The fixed reinforcing diagonal brace 71 is rod-shaped, and the adjustable reinforcing diagonal brace 72 can be a threaded telescopic rod. One end of the fixed reinforcing diagonal brace 71 and the adjustable reinforcing diagonal brace 72 are fixed to the bottom mold 2, and the other end is fixed to the side of the first inner mold sub-module to support the first mold section 31, thereby strengthening the structural rigidity of the first mold section 31 and preventing deformation during casting. The fixed reinforcing diagonal brace 71 can support the fixed part of the first mold section 31, and the adjustable reinforcing diagonal brace 72 can support specific positions of the first mold section 31. The adjustable horizontal support rod 5 is a threaded telescopic rod, and the two ends of the adjustable horizontal support rod 5 respectively abut against two opposite second inner mold sub-modules. Two adjustable horizontal support rods 5 are installed on each pair of second inner mold sub-modules to strengthen the structural rigidity of the second mold section 32 and prevent deformation during casting.

[0063] The adjustable horizontal support rod 5 and the adjustable reinforcing diagonal brace 72 are equipped with threaded sleeves, which are used to adjust the distance.

[0064] like Figure 2 As shown, a plurality of first steel strand pre-embedded part positioning fixtures 33 are arranged in a ring on the outer surface of the first module 31. The positioning opening of the first steel strand pre-embedded part positioning fixture 33 is set vertically upward. The first steel strand pre-embedded part positioning fixture 33 is fixed to the outer surface of the first module 31 by bolts, which can realize the positioning of the lower end of the steel strand pre-embedded part 9. The fixing bolt between the first steel strand pre-embedded part positioning fixture 33 and the first module 31 can be set at the contact position between the two. For example, the bolt is set on the inner side of the first module 31, passes through the first module 31 and is connected to the first steel strand pre-embedded part positioning fixture 33.

[0065] like Figure 4As shown, the cantilever positioning structure 8 includes: a cantilever fixture body 81, an installation rod 82, an anchor bolt fixing fixture 84, and a second steel strand pre-embedded part positioning fixture 85. The cantilever fixture body 81 is annular, with inner and outer rings corresponding to the inner mold 3 and outer mold 4, respectively. An installation gap exists between the inner and outer rings of the cantilever fixture body 81. Several installation strips are arranged between the installation gaps, and these strips are installed in a circumferential annular array within the installation gaps. The two ends of each installation strip are fixed to the inner and outer inner surfaces of the cantilever fixture body 81, respectively. The anchor bolt fixing fixture 84 is coaxially installed with the cantilever fixture body 81 within the installation gaps and is connected to the installation strips. The second steel strand pre-embedded part positioning fixture 85 is installed within the installation gaps. The inner side of the second steel strand pre-embedded part positioning fixture 85 is connected to the cantilever fixture body 81, and the outer side is connected to the anchor bolt fixing fixture 84. Anchor bolt fixing fixture 84 is used to fix the assembled anchor bolt cage. Several second steel strand pre-embedded component positioning fixtures 85 are provided, each corresponding one-to-one with the first steel strand pre-embedded component positioning fixture 33 on the outer surface of the first module segment 31, with the same number of each. The second steel strand pre-embedded component positioning fixture 85 is used to position the upper end of the steel strand pre-embedded component 9. Several mounting rods 82 are provided; in this embodiment, four mounting rods 82 are provided. Every two mounting rods 82 are staggered to form an X-shaped structure and then fixed to both ends of the upper surface of the cantilever fixture body 81.

[0066] By setting up the cantilever positioning structure 8, the precise positioning and installation of the anchor bolt components and the steel strand embedded parts 9 were achieved, which greatly improved the positional accuracy of the anchor bolt cage and other connecting parts and the prestressed steel strands in the concrete transition section and reduced the difficulty of docking.

[0067] The steel strand embedded part 9 is a pre-embedded steel pipe. The lower end of the steel strand embedded part 9 is installed in the first steel strand embedded part positioning fixture 33, and the upper end of the steel strand embedded part 9 is installed on the second steel strand embedded part positioning fixture 85.

[0068] The cantilever positioning structure 8 is equipped with several horizontal and vertical reinforcing supports. Several horizontal reinforcing supports are arranged in a circular array around the circumference of the cantilever fixture body 81, with one end connected to the inner ring and the other end connected to the outer ring. Several vertical reinforcing supports are also arranged in a circular array around the circumference of the cantilever fixture body 81. One end of each vertical reinforcing support abuts against the bottom of the outer ring of the cantilever fixture body 81, and the other end is mounted on the mold platform 1. The vertical reinforcing supports are vertically positioned on the outside of the outer mold 4. This arrangement effectively increases the strength and rigidity of the cantilever positioning structure 8, reducing bending deformation under components such as anchor cages and embedded steel strands 9, and improving the positioning accuracy of these components. The lengths of both the horizontal and vertical reinforcing supports are adjustable for easy assembly and construction.

[0069] According to an embodiment of the present invention, another aspect provides a construction method for manufacturing a mold for a concrete transition section of a wind turbine tower, specifically including the following steps:

[0070] S1. Assemble the first mold segment 31 and the second mold segment 32, fix the second mold segment 32 onto the first mold segment 31, and install the adjustable horizontal support rod 5 on the second mold segment 32. Specifically, before pouring, the inner mold 3 is installed and fixed. Several first inner mold sub-modules are connected in a ring shape with bolts to form a frustum-shaped first mold segment 31. The first mold segment 31 is connected to the bottom mold 2 with bolts. Several first steel strand pre-embedded parts positioning fixtures 33 are fixed to the outer surface of the first mold segment 31. Each second inner mold sub-module of the second mold segment 32 is vertically installed on the first mold segment 31 with bolts, and adjacent second inner mold modules are connected with bolts.

[0071] Meanwhile, depending on the construction site conditions, fixed reinforcing braces 71 and adjustable reinforcing braces 72 can be installed inside the first module 31 to support the first module 31.

[0072] S2. Install adjustable horizontal support rods 5 on the second module segment 32. Adjustable horizontal support rods 5 are used to connect and fix two opposing second inner mold sub-modules. The two ends of the adjustable horizontal support rods 5 can be fixed to the corresponding two second inner mold sub-modules respectively using bolts. In this embodiment, four adjustable horizontal support rods 5 are provided between the two pairs of second inner mold sub-modules, two rods forming a group, and the two groups of adjustable horizontal support rods 5 are perpendicular to each other.

[0073] S3. Pre-install the cantilever positioning structure 8, hoisting and placing it onto the inner mold 3. Position, splice, and fix the anchor cage components, steel strand embedded parts 9, and cantilever positioning structure 8 outside the mold, using bolts to connect them into a single unit. Install the anchor cage on the anchor fixing fixture 84. Install the upper ends of several steel strand embedded parts 9 one-to-one into the second steel strand embedded part positioning fixture 85, using the cantilever fixture lifting lugs 83 for hoisting, and place the entire structure onto the inner mold 3. Insert the lower ends of several steel strand embedded parts 9 one-to-one into the first steel strand embedded part positioning fixture 33, and fix the cantilever fixture body 81 to the inner mold 3 using bolts.

[0074] S4: Perform the positioning and binding of the internal steel reinforcement cage.

[0075] S5. After the reinforcing cage is tied, the outer formwork 4 is installed and fixed. The outer formwork sub-module is installed on the sliding bracket 62. The movement of the sliding bracket 62 within the slide rail 61 ensures that the outer formwork 4 is in close contact with the outer edge of the bottom formwork 2, and it is fixed using a limiting device. The outer formwork 4 is fixed with the anchor bolt cage components, the steel strand embedded parts 9, and the cantilever positioning structure 8 using bolts.

[0076] S6: Concrete pouring work is carried out for the concrete transition section. Workers pour concrete through the steel ladder and the operating platform 41 of the outer formwork 4, and fully vibrate it. After pouring to the top surface of the outer formwork 4, the top surface of the concrete is leveled. Steam curing or water curing is used for 28 days to ensure the strength of the concrete.

[0077] S7: After maintenance, proceed with the removal of positioning bolts. First, remove the fixing bolts between the first steel strand embedded part positioning fixture 33 and the first mold section 31. Remove the fixing bolts between the cantilever positioning structure 8 and the outer mold 4 and the inner mold 3. At the same time, remove the fixing bolts between the anchor bolt fixing fixture 84, the steel strand embedded part 9 and the cantilever fixture body 81, so that there is no connection between the components of the mold. Finally, remove the fixing bolts between the first mold section 31 and the second mold section 32.

[0078] S8: After the positioning bolts are removed, the concrete demolding process is carried out. First, the cantilever fixture body 81 is removed by the cantilever fixture lifting lug 83, and the operating platform 41 and platform steel ladder 42 on the outer formwork 4 are removed. At the same time, the slide rail 61 is used to ensure that the outer formwork 4 is slid out, realizing the separation of the outer formwork 4 from the outer surface of the concrete. The second formwork section 32 is separated from the outer surface of the concrete by adjusting the threaded sleeve of the adjustable horizontal support rod 5. Finally, the entire concrete transition section is lifted out of the mold by the anchor bolt fixing fixture 84 and the anchor bolt cage, realizing the demolding of the entire structure.

[0079] S9: After the entire concrete transition section is demolded, the positioning fixture 33 for the first steel strand embedded part left on the concrete is removed.

[0080] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A wind turbine tower concrete transition piece manufacturing mold, characterized by, The wind power tower concrete manufacturing mold comprises a mold table (1), a bottom mold (2) installed on the mold table (1), an inner mold (3) installed on the bottom mold (2), and an outer mold (4) installed on the mold table (1). The inner mold (3) comprises a plurality of inner mold sub-modules arranged in a ring shape to form a ring-shaped inner mold (3). The outer mold (4) comprises a plurality of outer mold sub-modules arranged in a ring shape around the edge of the bottom mold (2). The adjustable horizontal support rod (5) is installed on the inner mold (3) and abuts against two opposite inner mold sub-modules. The sliding structure (6) is installed on the mold table (1) and is used to drive the outer mold sub-modules to move away from the center of the mold table (1). The first mold segment (31) comprises a plurality of first inner mold sub-modules arranged in a ring shape to form the first mold segment (31). The second mold segment (32) comprises at least two pairs of second inner mold sub-modules arranged in a ring shape to form the second mold segment (32). Any pair of second inner mold sub-modules is arranged oppositely. The arc length of adjacent second inner mold sub-modules is different along the circumferential direction of the second mold segment (32). The sliding structure (6) is provided in one-to-one correspondence with the outer mold sub-modules. The sliding structure (6) comprises a slide rail (61) installed on the mold table (1) along the radial direction of the bottom mold (2), and a sliding bracket (62) installed on the slide rail (61) and connected with the corresponding outer mold sub-module.

2. The windmill tower section manufacturing mold according to claim 1, wherein, The first mold segment (31) is provided with a plurality of first steel strand embedded part positioning tools (33). The wind power tower concrete manufacturing mold further comprises a cantilever positioning structure (8). The cantilever positioning structure (8) comprises a cantilever tool body (81) fixed to the top of the outer mold (4) and the inner mold (3), a plurality of installation rods (82) arranged at least partially in a staggered manner on the cantilever tool body (81), an anchor bolt fixing tool (84) installed on the cantilever tool body (81), and a second steel strand embedded part positioning tool (85) connected with the cantilever tool body (81) at the inner circle and connected with the anchor bolt fixing tool (84) at the outer circle. ​ 3. The windmill tower section manufacturing mold according to claim 1, wherein, ​ 4. The wind turbine tower concrete segment manufacturing mold of claim 3, wherein, ​ ​ ​ ​ ​ ​ 5. The wind turbine tower concrete segment manufacturing mold of claim 4, wherein, The steel strand pre-embedded part (9) is respectively installed in the first steel strand pre-embedded part positioning tool (33) and the second steel strand pre-embedded part positioning tool (85).

6. The wind turbine tower concrete segment manufacturing mold of claim 4, wherein, The mounting rod (82) is further provided with an eye bar (83).

7. The wind turbine tower section manufacturing mold of claim 1, wherein, The wind power tower concrete transition section manufacturing mold comprises a diagonal bracing structure (7) connected with the first mold section (31) to support the first mold section (31).

8. A construction method of a wind power tower concrete transition section manufacturing mold, adapted to the wind power tower concrete transition section manufacturing mold of any one of claims 4-6, characterized in that, Specifically comprising the following steps: The first mold section (31) and the second mold section (32) are assembled, the second mold section (32) is fixed on the first mold section (31), an adjustable horizontal support rod (5) is installed on the second mold section (32), a cantilever positioning structure (8) is pre-installed and hoisted and placed on the inner mold (3), positioning and binding of the internal steel reinforcement cage are carried out, an outer mold (4) is installed by using a sliding structure (6), concrete pouring and concrete curing are carried out in the mold, the cantilever positioning structure (8), the outer mold (4) and the inner mold (3) are removed, and the first steel strand pre-embedded part positioning tool (33) is removed.

Images