Arc-shaped duct piece mold for wind power tower drum
By designing a wind power tower arc-shaped tube sheet mold with electric hydraulic rod drive, the existing molds are solved, the problem of low automation and low efficiency is achieved, and the mold clamping and opening process is improved, and the stability and safety of the mold are improved.
Patent Information
- Application Number
- CN202510258177.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2045-03-06
AI Technical Summary
The existing wind power tower arc-shaped tube sheet molds have low automation degree, low efficiency, and there are mold collision deformation and safety risks when closing and opening the mold.
A wind power tower arc-shaped tube sheet mold is designed, using an electro-hydraulic rod to drive the movement of the transmission and the inner mold, and the mechanical linkage and automation of the mold are increased through the sliding table and the support rod, thereby improving the efficiency of mold closing and opening.
It improves the degree of automation of the mold, enhances the efficiency of mold clamping and opening, reduces the risk of collision deformation of the mold, and improves the casting quality and safety of cement pipe sheets.
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Figure CN119734344A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of building construction technology, and in particular to a wind power tower arc segment mold. Background Art
[0002] As a clean energy, wind power generation has ushered in rapid development under the background of domestic energy conservation and emission reduction. With the gradual development of onshore wind farms in recent years, the height of wind towers has been increasing, and new steel-concrete composite towers with greater rigidity have gradually become the mainstream. In order to improve construction efficiency, the concrete tower sections are mostly prefabricated in the factory and assembled on site, and for the convenience of transportation, they are often made in pieces. The traditional horizontal mold system is convenient for workers to perform construction operations such as reinforcement and pouring, but it often brings problems such as large surface area and low construction efficiency. It is difficult to ensure the pouring quality and appearance of the outer side of the concrete segment, affecting the overall safety and aesthetics of the steel-concrete tower.
[0003] At present, the curved tube segment molds of wind turbine towers mainly adopt vertical molds. Vertical molds can overcome the problems existing in the horizontal molds in the process of manufacturing tower segments. However, the clamping and opening actions of the vertical molds in the prior art require the help of a crane, which not only affects the efficiency and effect of clamping and opening, but also easily causes collision and deformation of the mold, and there is also a safety risk of the mold falling and injuring people.
[0004] With regard to the above-mentioned related technologies, other tools are needed for closing and opening the vertical mold, and the degree of automation is low, which leads to low efficiency of closing and opening the mold. Summary of the invention
[0005] In order to increase the automation of the mold and improve the efficiency of mold closing and mold opening, the present application provides a wind turbine tower arc segment mold.
[0006] The present application provides a wind turbine tower curved segment mold, which adopts the following technical solution: A wind power tower arc segment mold, comprising: Base; An arc-shaped bottom plate, wherein the arc-shaped bottom plate is fixedly connected to the base; An inner mold, the inner mold is slidably connected to the base, and the inner mold abuts against the inner wall of the arc-shaped bottom plate; A driving member, the driving member is mounted on the base, the driving member is fixedly connected to the inner mold, and the driving member is used to drive the inner mold to slide away from the arc-shaped bottom plate; An outer mold, the outer mold is slidably connected to the base, and the outer mold abuts against the outer wall of the arc-shaped bottom plate; A transmission member, the transmission member is mounted on the base, the transmission member is connected to the outer mold, the transmission member is connected to the driving member, and the transmission member is used to drive the outer mold to move away from the arc bottom plate; Two side molds, one end of each of the two side molds is hinged to the side wall of the outer mold plate; A locking piece, wherein the locking piece is mounted on the side mold, the locking piece is connected to the inner mold, and the locking piece is used to fix the side mold and the inner mold.
[0007] By adopting the above technical scheme, cement is poured between the arc-shaped bottom plate, the inner mold, and the side molds. When the cement solidifies, the locking parts are removed, and the two side molds are opened to separate the outer mold and the inner mold. The driving part drives the inner mold to move in the direction away from the arc-shaped bottom plate. The movement of the driving part drives the transmission part to move. The movement of the transmission part drives the outer mold to move toward the end away from the arc-shaped bottom plate, so that the arc-shaped pipe segment is demolded, the automation of the mold is increased, and the efficiency of mold closing and opening is improved.
[0008] Optionally, the driving member includes: An electric hydraulic rod, the electric hydraulic rod is fixedly connected to the base, and the electric hydraulic rod is connected to the transmission member; A slide is slidably connected to the base, the slide is fixedly connected to the inner mold, and the slide is fixedly connected to the movable end of the electric hydraulic rod.
[0009] By adopting the above technical solution, the movement of the electric hydraulic rod drives the movement of the transmission part, providing driving force for the transmission part, thereby increasing the mechanical linkage of the mold. The movement of the electric hydraulic rod drives the movement of the slide, and the movement of the slide drives the movement of the inner mold, thereby increasing the automation of the mold and improving the efficiency of mold closing and opening.
[0010] Optionally, the transmission member: Two fixing columns, one end of each of which is symmetrically arranged and fixedly connected to the base; Four first telescopic rods, the fixed ends of the four first telescopic rods are evenly arranged and fixedly connected to the two fixed columns, the movable ends of the first telescopic rods are fixedly connected to the side walls of the outer mold, and the four first telescopic rods are all connected to the electric hydraulic rod.
[0011] By adopting the above technical solution, the movement of the electric hydraulic rod drives the movement of the first telescopic rod, and the movement of the first telescopic rod drives the movement of the inner mold, thereby increasing the automation of the mold and improving the efficiency of mold closing and mold opening.
[0012] Optionally, two mounting grooves are symmetrically provided on the side wall of the inner mold, and auxiliary parts are installed in the two mounting grooves, and the two auxiliary parts each include: A sliding rod, the sliding rod is installed in the installation groove, and the two ends of the sliding rod are respectively fixedly connected to the upper and lower inner walls of the installation groove; A slider, the slider is sleeved and slidably connected to the sliding rod, and the side wall of the slider is tightly fitted with the side wall of the mounting groove; A second telescopic rod, wherein the second telescopic rod is disposed in the mounting groove, a fixed end of the second telescopic rod is fixedly connected to an inner wall of a top wall of the mounting groove, and a movable end of the second telescopic rod is fixedly connected to the slider; An auxiliary rod, one end of which is hinged on the two sliding blocks, and the other end of which is hinged on the base.
[0013] By adopting the above technical solution, the extension of the electric hydraulic rod drives the extension of the second telescopic rod, and the extension of the second telescopic rod drives the slider to slide downward. The sliding of the slider drives the auxiliary rod to move, so that the auxiliary rod tilts. When the inner mold abuts against the inner wall of the arc-shaped bottom plate, the inner mold is supported, thereby improving the stability of the inner mold and the casting quality of the cement pipe segment.
[0014] Optionally, both of the two locking members include: A locking block, the locking block is fixedly connected to the side wall of the side mold, and the locking block abuts against the inner mold; A bolt, the bolt is rotatably and fixedly connected to the inner mold, and the bolt is passed through and rotatably connected to the locking block; A nut is coaxially sleeved and threadedly connected to the bolt.
[0015] By adopting the above technical solution, when the side mold is abutted against the inner mold and the outer mold, the bolts are passed through the locking blocks and the nuts tighten the bolts to ensure the tightness of the side wall and improve the casting quality of the cement pipe segment.
[0016] Optionally, two grooves are evenly formed on the top wall of the arc-shaped bottom plate, and lifting members are arranged in the two grooves, and the lifting members include: A third telescopic rod, a fixed end of which is fixedly connected to the bottom wall of the groove, and the third telescopic rod is connected to the electric hydraulic rod; A lifting plate is fixedly connected to the movable end of the third telescopic rod, and the side wall of the lifting plate is tightly fitted with the inner side wall of the groove.
[0017] By adopting the above technical solution, the movement of the electric hydraulic rod drives the movement of the third telescopic rod, the movement of the third telescopic rod drives the movement of the lifting plate, and the movement of the lifting plate drives the arc-shaped pipe segment to be lifted, making it easier for the arc-shaped pipe segment to be separated from the mold.
[0018] Optionally, a relief valve is connected to the fixed end of the electric hydraulic rod, and the other end of the relief valve is connected to the fixed end of the third telescopic rod.
[0019] By adopting the above technical solution, the overflow valve drives the cooled arc-shaped pipe segment to be lifted after the inner mold and the outer mold are away from the arc-shaped bottom plate, thereby ensuring the operating stability of the mold.
[0020] Optionally, a support rod is fixedly connected to the top wall of the slide, and the other end of the support rod is fixedly connected to the side wall of the inner mold.
[0021] By adopting the above technical solution, the support plate reinforces and supports the inner mold, prevents the inner mold from deforming, and improves the casting quality of the arc-shaped pipe segment.
[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The movement of the electric hydraulic rod drives the transmission parts to move, providing driving force for the transmission parts, increasing the mechanical linkage of the mold. The movement of the electric hydraulic rod drives the slide to move, and the movement of the slide drives the inner mold to move, increasing the automation of the mold and improving the efficiency of mold closing and opening; 2. The extension of the electric hydraulic rod drives the extension of the second telescopic rod, which drives the slider to slide downward, and the sliding of the slider drives the auxiliary rod to move, so that the auxiliary rod tilts, and when the inner mold abuts against the inner wall of the arc-shaped bottom plate, the inner mold is supported, thereby improving the stability of the inner mold and the casting quality of the cement segment; 3. The overflow valve drives the cooled arc-shaped tube segment to rise after the inner and outer molds are away from the arc-shaped bottom plate, thus ensuring the operation stability of the mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a cross-sectional view of an embodiment of the present application; Figure 3 It is a cross-sectional view showing the lifting member according to an embodiment of the present application.
[0024] Description of reference numerals: 1. Base; 2. Arc bottom plate; 21. Groove; 3. Inner mold; 31. Mounting slot; 4. Driving member; 41. Electric hydraulic rod; 42. Slide; 43. Support rod; 5. Outer mold; 6. Transmission member; 61. Fixed column; 62. First telescopic rod; 7. Auxiliary member; 71. Sliding rod; 72. Sliding block; 73. Second telescopic rod; 74. Auxiliary rod; 8. Lifting member; 81. Third telescopic rod; 82. Lifting plate; 83. Overflow valve; 9. Side mold; 101. Locking member; 1011. Locking block; 1012. Bolt; 1013. Nut. DETAILED DESCRIPTION
[0025] The following is combined with Figure 1-3 This application is described in further detail.
[0026] The embodiment of the present application discloses a wind power tower arc segment mold.
[0027] Reference Figure 1 and Figure 2 The arc-shaped segment mold of a wind power tower comprises a base 1, on which an arc-shaped bottom plate 2 is fixedly connected, on which an inner mold 3 is abutted against the inner wall of the arc-shaped bottom plate 2, and the bottom wall of the inner mold 3 is slidably connected to the base 1, and a side wall of the inner mold 3 away from the arc-shaped bottom plate 2 is connected with a driving member 4, which is installed on the top wall of the base 1, and the driving member 4 is connected with a transmission member 6, which is installed on the top wall of the base 1, and the transmission member 6 is connected with an outer mold 5, which is slidably connected to the base 1, and the outer mold 5 abuts against the outer wall of the arc-shaped bottom plate 2, and two side molds 9 are hinged on the side walls at both ends of the outer mold 5, and a locking member 101 is installed at one end of the side mold 9 away from the outer mold 5, and the locking member 101 is connected to the side wall of one end of the inner mold 3 away from the arc-shaped bottom plate 2, and a lifting member 8 is installed on the arc-shaped bottom plate 2, and the lifting member 8 is connected to the driving member 4, and the driving member 4 is connected to two auxiliary members 7, and the two auxiliary members 7 are symmetrically installed on the side wall of one end of the inner plate away from the arc-shaped bottom plate 2.
[0028] Cement is poured between the curved bottom plate 2, the inner mold 3, and the side molds 9. When the cement solidifies, the locking part 101 is removed, and the two side molds 9 are opened to separate the outer mold 5 and the inner mold 3. The driving part 4 drives the inner mold 3 to move away from the curved bottom plate 2. The movement of the driving part 4 drives the transmission part 6 to move. The movement of the transmission part 6 drives the outer mold 5 to move toward the end away from the curved bottom plate 2. When the outer mold 5 and the inner mold 3 move to the predetermined position, the lifting assembly moves to push the clean cement segment upward, making it easier to remove the cement segment from the mold, increasing the automation of the mold, and improving the efficiency of mold closing and opening. The auxiliary part 7 is used to support the inner plate to ensure the stability of the inner plate.
[0029] Reference Figure 2 and Figure 3 The driving member 4 includes an electric hydraulic rod 41, the fixed end of the electric hydraulic rod 41 is fixedly connected to the base 1, the electric hydraulic rod 41 is connected to the transmission member 6, the auxiliary member 7 and the lifting member 8, the movable end of the electric hydraulic rod 41 is fixedly connected to a slide 42, the slide 42 is slidably connected to the base 1, one end of the slide 42 is fixedly connected to the side wall of the inner mold 3 away from the arc-shaped bottom plate 2, one end of the slide 42 is fixedly connected to the top wall of the slide 42, the other end of the support rod 43 is fixedly connected to the side wall of the inner mold 3, and the horizontal height of the end of the support rod 43 close to the slide 42 is lower than the horizontal height of the end of the support rod 43 close to the inner mold 3.
[0030] The movement of the electric hydraulic rod 41 drives the transmission part 6, the auxiliary part 7 and the lifting part 8 to move, providing driving force for the transmission part 6, the auxiliary part 7 and the lifting part 8, thereby increasing the mechanical linkage of the mold. The movement of the electric hydraulic rod 41 drives the slide 42 to move, and the movement of the slide 42 drives the support rod 43 and the inner mold 3 to move. The support rod 43 supports the inner mold 3, and the movement of the slide 42 drives the inner mold 3 to move, thereby increasing the automation of the mold and improving the efficiency of mold closing and mold opening.
[0031] Reference Figure 2 and Figure 3 The transmission member 6 includes two fixed columns 61, which are arranged on the side of the outer mold 5 away from the arc-shaped bottom plate 2. One end of the two fixed columns 61 is symmetrically arranged and fixedly connected to the top wall of the base 1. Two first telescopic rods 62 are fixedly connected to the side wall of the fixed column 61 close to the outer mold 5. The movable ends of the two first telescopic rods 62 are fixedly connected to the end of the outer mold 5 away from the arc-shaped bottom plate 2. The ends of the fixed ends of the two first telescopic rods 62 away from the movable ends are both connected to the ends of the fixed ends of the electric hydraulic rod 41 close to the movable end.
[0032] The movement of the electric hydraulic rod 41 drives the first telescopic rod 62 to move, and the movement of the first telescopic rod 62 drives the inner mold 3 to move, thereby increasing the automation of the mold and improving the efficiency of mold closing and mold opening.
[0033] Reference Figure 2 and Figure 3 Two mounting grooves 31 are symmetrically provided on the side wall of the inner mold 3 away from the bottom plate of the arc plate. The auxiliary part 7 includes a sliding rod 71. The two ends of the sliding rod 71 are respectively fixedly connected to the upper and lower inner walls of the mounting groove 31. A sliding block 72 is sleeved and slidably connected on the sliding rod 71. The side walls at both ends of the sliding block 72 are tightly fitted with the inner wall of the mounting groove 31. The fixed end of the second telescopic rod 73 is fixedly connected to the top wall of the mounting groove 31. The end of the fixed end of the second telescopic rod 73 away from the movable end is connected to the end of the fixed end of the electric hydraulic rod 41 close to the movable end. The movable end of the second telescopic rod 73 is fixedly connected to the top wall of the sliding block 72. One end of an auxiliary rod 74 is hinged on the side wall of the end of the sliding block 72 away from the bottom wall of the mounting groove 31. The other end of the auxiliary rod 74 is hinged on the base 1. The auxiliary rod 74 passes through the center of the inner wall of the arc bottom plate 2 in the length direction of the projection of the mounting base 1.
[0034] The extension of the electric hydraulic rod 41 drives the second telescopic rod 73 to extend, and the extension of the second telescopic rod 73 drives the slider 72 to slide downward. The sliding of the slider 72 drives the auxiliary rod 74 to move, so that the auxiliary rod 74 tilts. When the inner mold 3 abuts against the inner wall of the arc-shaped bottom plate 2, the inner mold 3 is supported, thereby improving the stability of the inner mold 3 and the casting quality of the cement pipe segment.
[0035] Reference Figure 2 and Figure 3The locking member 101 includes a locking block 1011, which abuts against the side wall of the inner mold 3 away from the arc-shaped bottom plate 2, and one end of the locking block 1011 is fixedly connected to the end of the side mold 9 away from the outer mold 5. A bolt 1012 is passed through and fixedly connected to the locking block 1011, and a nut 1013 is threaded on one end of the bolt 1012. The bolt 1012 is rotatably connected to the side wall of the inner mold 3 away from the arc-shaped bottom plate 2.
[0036] When the side mold 9 is in contact with the inner mold 3 and the outer mold 5, the bolts 1012 are passed through the locking blocks 1011, and the nuts 1013 tighten the bolts 1012 to ensure the tightness of the side walls and improve the casting quality of the cement segments.
[0037] Reference Figure 2 and Figure 3 Two grooves 21 are symmetrically provided on the arc-shaped bottom plate 2, and the lifting member 8 includes a third telescopic rod 81, a fixed end of the third telescopic rod 81 is fixedly connected to the bottom wall of the groove 21, and a lifting plate 82 is fixedly connected to the movable end of the third telescopic rod 81, and the peripheral side wall of the lifting plate 82 is tightly fitted with the inner wall of the groove 21, and the top wall of the lifting plate 82 is on the same plane as the top wall of the arc-shaped bottom plate 2, and the movable end of the third telescopic rod 81 is close to the groove 21. One end of the overflow valve 83 is connected, and the other end of the overflow valve 83 is connected to the fixed end of the electric hydraulic rod 41 away from the movable end.
[0038] The contraction of the electric hydraulic rod 41 drives the inner mold 3 to contract, and the electric hydraulic rod 41 drives the first telescopic rod 62 to contract. When the first telescopic rod 62 contracts to a predetermined position, the hydraulic fluid in the electric hydraulic rod 41 enters the third telescopic rod 81 through the overflow valve 83, and the third telescopic rod 81 extends to drive the lifting plate 82 to move. The movement of the lifting plate 82 lifts the condensed arc tube segment, making it more convenient for the arc tube to be demolded.
[0039] The implementation principle of the curved tube segment mold of a wind turbine tower in the embodiment of the present application is as follows: cement is poured between the curved bottom plate 2, the inner mold 3, and the side mold 9. When the cement solidifies, the locking member 101 is removed, and the two side molds 9 are opened to separate the outer mold 5 and the inner mold 3. The driving member 4 drives the inner mold 3 to move in a direction away from the curved bottom plate 2. The movement of the driving member 4 drives the transmission member 6 to move. The movement of the transmission member 6 drives the outer mold 5 to move toward one end away from the curved bottom plate 2. When the outer mold 5 and the inner mold 3 move to the predetermined position, the lifting assembly moves to push the clean cement tube segment upward, making it easier to remove the cement tube segment from the mold, increasing the automation of the mold, and improving the efficiency of mold closing and opening. The auxiliary member 7 is used to support the inner plate to ensure the stability of the inner plate.
[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A wind turbine tower arc segment mold, characterized by: include: Base (1); An arc-shaped bottom plate (2), the arc-shaped bottom plate (2) being fixedly connected to the base (1); An inner mold (3), the inner mold (3) being slidably connected to the base (1), the inner mold (3) being in contact with the inner wall of the arc-shaped bottom plate (2); a driving member (4), the driving member (4) being mounted on the base (1), the driving member (4) being fixedly connected to the inner mold (3), and the driving member (4) being used to drive the inner mold (3) to slide in a direction away from the arc-shaped bottom plate (2); An outer mold (5), the outer mold (5) being slidably connected to the base (1), the outer mold (5) abutting against the outer wall of the arc-shaped bottom plate (2); a transmission member (6), the transmission member (6) being mounted on the base (1), the transmission member (6) being connected to the outer mold (5), the transmission member (6) being connected to the driving member (4), and the transmission member (6) being used to drive the outer mold (5) to move in a direction away from the arc-shaped bottom plate (2); Two side molds (9), one end of each of the two side molds (9) being hinged to the side wall of the outer mold (5); A locking piece (101), the locking piece (101) being mounted on the side mold (9), the locking piece (101) being connected to the inner mold (3), and the locking piece (101) being used to fix the side mold (9) and the inner mold (3).
2. The wind turbine tower arc segment mold according to claim 1, characterized in that: The driving member (4) comprises: An electric hydraulic rod (41), the electric hydraulic rod (41) being fixedly connected to the base (1), and the electric hydraulic rod (41) being connected to the transmission member (6); A slide (42), the slide (42) being slidably connected to the base (1), the slide (42) being fixedly connected to the inner mold (3), and the slide (42) being fixedly connected to the movable end of the electric hydraulic rod (41).
3. The wind turbine tower arc segment mold according to claim 2, characterized in that: The transmission member (6) comprises: Two fixing columns (61), one end of the two fixing columns (61) being symmetrically arranged and fixedly connected to the base (1); Four first telescopic rods (62), the fixed ends of the four first telescopic rods (62) are evenly arranged and fixedly connected to the two fixed columns (61), the movable ends of the first telescopic rods (62) are fixedly connected to the side wall of the outer mold (5), and the four first telescopic rods (62) are all connected to the electric hydraulic rod (41).
4. The wind turbine tower arc segment mold according to claim 2, characterized in that: Two mounting grooves (31) are symmetrically formed on the side wall of the inner mold (3), and auxiliary parts (7) are installed in the two mounting grooves (31). The two auxiliary parts (7) each include: A sliding rod (71), the sliding rod (71) being installed in the installation groove (31), and the two ends of the sliding rod (71) being fixedly connected to the upper and lower inner walls of the installation groove (31) respectively; A sliding block (72), the sliding block (72) being sleeved and slidably connected to the sliding rod (71), the side wall of the sliding block (72) being tightly fitted with the side wall of the mounting groove (31); a second telescopic rod (73), the second telescopic rod (73) being arranged in the installation groove (31), the fixed end of the second telescopic rod (73) being fixedly connected to the inner wall of the top wall of the installation groove (31), and the movable end of the second telescopic rod (73) being fixedly connected to the sliding block (72); An auxiliary rod (74), one end of the auxiliary rod (74) is hinged to the two sliders (72), and the other end of the auxiliary rod (74) is hinged to the base (1).
5. The wind turbine tower arc segment mold according to claim 1, characterized in that: The two locking members (101) each comprise: A locking block (1011), the locking block (1011) being fixedly connected to a side wall of the side mold (9), the locking block (1011) being in abutment with the inner mold (3); A bolt (1012), the bolt (1012) being rotatably and fixedly connected to the inner mold (3), and the bolt (1012) being passed through and rotatably connected to the locking block (1011); A nut (1013), wherein the nut (1013) is coaxially sleeved and threadedly connected to the bolt (1012).
6. The wind turbine tower arc segment mold according to claim 2, characterized in that: Two grooves (21) are evenly arranged on the top wall of the arc-shaped bottom plate (2), and lifting members (8) are arranged in the two grooves (21). The lifting members (8) include: a third telescopic rod (81), the fixed end of the third telescopic rod (81) being fixedly connected to the bottom wall of the groove (21), and the third telescopic rod (81) being connected to the electric hydraulic rod (41); A lifting plate (82), the lifting plate (82) being fixedly connected to the movable end of the third telescopic rod (81), the side wall of the lifting plate (82) being tightly fitted to the inner side wall of the groove (21).
7. The wind turbine tower arc segment mold according to claim 6, characterized in that: The fixed end of the electric hydraulic rod (41) is connected to a relief valve (83), and the other end of the relief valve (83) is connected to the fixed end of the third telescopic rod (81).
8. The wind turbine tower arc segment mold according to claim 2, characterized in that: A support rod (43) is fixedly connected to the top wall of the slide (42), and the other end of the support rod (43) is fixedly connected to the side wall of the inner mold (3).
Citation Information
Patent Citations
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