Box girder formwork facilitating continuous pouring

Abstract

This invention belongs to the field of box girder formwork technology, specifically relating to a box girder formwork that facilitates continuous casting. It includes a horizontal rail support installed between two piers, with a movable trolley mounted on the horizontal rail support, capable of moving between the two piers. The movable trolley is equipped with an outer mold unit and an inner mold unit located inside the outer mold unit, forming a casting cavity between the outer and inner mold units. The front, rear, and top sides of the casting cavity are open. The outer mold unit can expand away from the casting cavity, and the inner mold unit can contract away from the casting cavity. The outer mold unit includes a bottom outer mold located below the inner mold unit and two side outer molds located on either side of the inner mold unit. The movable trolley is equipped with an outer mold adjustment assembly connected to the bottom and side outer molds. This invention reduces the process of moving the formwork during continuous casting of the box girder, facilitating continuous casting.

Description

Technical Field

[0001] This invention belongs to the field of box girder formwork technology, specifically relating to a box girder formwork that facilitates continuous casting. Background Technology

[0002] In the process of box girder casting, formwork is needed to limit the concrete and shape it. There are various casting methods, such as one-time casting and continuous multi-segment casting.

[0003] In order to reduce the number of formworks during continuous pouring, a set of formwork is usually used to pour multiple sections of box girder construction surface in sequence. For example, Chinese patent with authorization announcement number CN207130631U discloses a lightweight, quick-installation and disassembly type small box girder steel formwork, which has the advantages of simple construction and continuous construction. The mold is quickly spliced, and after a small box girder is completed, it can be directly hoisted to make the next small box girder, increasing construction efficiency.

[0004] However, since the box girder is set horizontally, during the box girder forming process, the concrete will come into close contact with the lower formwork under the action of gravity. This results in a large friction between the formwork and the box girder when the formwork is moved horizontally. Therefore, it is usually necessary to remove the formwork and then rebuild it, which increases the complexity of the process of moving the formwork. Summary of the Invention

[0005] The purpose of this invention is to provide a box girder formwork that facilitates continuous casting, thereby reducing the need to move the formwork during the continuous casting process and making continuous casting of the box girder easier.

[0006] The specific technical solution adopted by this invention is as follows:

[0007] A box girder formwork for continuous casting includes a horizontal rail support installed between two piers. A movable trolley that can move between the two piers is mounted on the horizontal rail support. An outer formwork unit and an inner formwork unit located inside the outer formwork unit are mounted on the movable trolley. A casting cavity is formed between the outer formwork unit and the inner formwork unit. The front, rear, and upper sides of the casting cavity are all open. The outer formwork unit can expand away from the casting cavity, and the inner formwork unit can contract away from the casting cavity.

[0008] Furthermore, the outer mold unit includes a bottom outer mold located below the inner mold unit and two side outer molds located on both sides of the inner mold unit. The mobile trolley is equipped with an outer mold adjustment assembly connected to the bottom outer mold and the side outer molds. The outer mold adjustment assembly can adjust the distance between the bottom outer mold and the inner mold unit, as well as the distance between the side outer molds and the inner mold unit.

[0009] Furthermore, the inner mold unit includes a connecting frame fixedly connected to the mobile trolley, an adjusting bracket unit fixedly connected to the connecting frame, and an upper inner mold located on the upper side of the adjusting bracket unit, a lower inner mold located on the lower side of the adjusting bracket unit, and two side inner molds located on both sides of the adjusting bracket unit respectively. The two ends of the upper inner mold are rotatably connected to the upper ends of the two side inner molds respectively, and the two ends of the lower inner mold are rotatably connected to the lower ends of the two side inner molds respectively.

[0010] Both the lower inner mold and the upper inner mold include two first half plates. The edges of the two first half plates that are close to each other are rotatably connected, and the edges of the two first half plates that are far from each other are rotatably connected to the upper ends of the two side inner molds, respectively. The inner sides of the two first half plates are connected to the adjustment bracket unit.

[0011] Furthermore, each of the two side inner molds includes two second half plates, the edges of the two side inner molds that are close to each other are rotatably connected, the edges of the two side inner molds that are far from each other are rotatably connected to the edges of the two first half plates respectively, and the inner sides of the two side inner molds are connected to the adjustment bracket unit.

[0012] Furthermore, the adjusting bracket unit includes a central frame fixedly connected to the connecting frame. A first adjusting unit connected to the first half plate is mounted on the central frame. The first adjusting unit includes a linear moving member mounted on the central frame. Two U-shaped members are mounted on the linear moving member. Each of the two U-shaped members is rotatably connected to a support rod. The ends of the two support rods away from the U-shaped members are rotatably connected to the inner sides of the two first half plates at positions close to each other.

[0013] Furthermore, the central frame is also equipped with a second adjustment unit connected to the second half plate. The second adjustment unit includes a second motor fixedly connected to the central frame and two racks slidably connected to the central frame. A gear is fixedly connected to the second motor. The two racks are located on both sides of the gear and are meshed with the gear. The ends of the racks are connected to one of the second half plates.

[0014] Furthermore, the linear moving component includes a screw support fixedly connected to a central frame, a rotating rod rotatably connected to the screw support, two symmetrically arranged threaded rods fixedly connected to the outer side of the rotating rod, and the thread directions of the two threaded rods being opposite, and threaded rings threadedly connected to the outer side of each of the two threaded rods, and the threaded rings being rotatably connected to a U-shaped component, and a first motor fixedly connected to the screw support, the output end of the first motor being connected to the rotating rod.

[0015] Furthermore, a connecting rod is fixedly connected to the first half plate, and a vertical rail is mounted on the outer side of the connecting rod and connected to the rack.

[0016] Furthermore, both ends of the horizontal rail bracket are fixedly connected to horizontal supports, and two movable sliding arms are installed inside the horizontal supports through an adjustment mechanism.

[0017] The technical effects achieved by this invention are as follows:

[0018] The present invention provides a box girder formwork that facilitates continuous casting. By moving the outer formwork unit and the inner formwork unit between two piers using a moving trolley, the continuous casting of the box girder can be completed. Furthermore, by moving the outer formwork unit and the inner formwork unit after the box girder is formed, the friction between the formwork and the box girder during the movement of the formwork can be reduced, making the movement of the formwork easier and thus facilitating the continuous casting of the box girder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the column connection unit of the present invention;

[0021] Figure 3 This is a partial structural schematic diagram of the present invention;

[0022] Figure 4 This is the present invention. Figure 3 The front view of the structure;

[0023] Figure 5 This is a schematic diagram of the internal mold unit of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the inner mold unit of the present invention;

[0025] Figure 7 This is a front view of the internal mold unit of the present invention.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Pier column; 2. Horizontal rail support; 3. Moving trolley; 4. Inner mold unit; 5. Outer mold unit; 6. Central column; 7. Column connection unit; 8. Horizontal support; 9. Sliding arm; 10. Adjustment mechanism; 11. Lower inner mold; 12. Connecting frame; 13. Electric push rod; 14. Bottom outer mold; 15. Side outer mold; 16. Upper inner mold; 17. Side inner mold; 18. Adjustment support unit; 19. First half plate; 20. Second half plate; 21. Central frame; 22. First adjustment unit; 23. Second adjustment unit; 24. Screw support; 25. First motor; 26. Rotating rod; 27. Threaded rod; 28. Threaded ring; 29. ​​U-shaped part; 30. Support rod; 31. Connecting rod; 32. Vertical rail; 33. Rack and pinion; 34. Second motor; 35. Gear. Detailed Implementation

[0028] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0029] like Figure 1 As shown, a box girder formwork that facilitates continuous casting includes a horizontal rail support 2 installed between two piers 1. The horizontal rail support 2 is equipped with a moving trolley 3 that can move between the two piers 1. The moving trolley 3 is equipped with an outer formwork unit 4 and an inner formwork unit 5 located inside the outer formwork unit 4. A casting cavity is formed between the outer formwork unit 4 and the inner formwork unit 5. The front, rear and top sides of the casting cavity are all open. The box girder can be formed by pouring concrete into the casting cavity.

[0030] When pouring the box girder, the horizontal rail support 2 is installed between the two piers 1. Then, the moving trolley 3 is moved to a position close to the piers 1. The reinforcing bars are woven into shape inside the pouring cavity, with one end of the reinforcing bars extending to the outside of the pouring cavity. Then, concrete is poured from one end of the pouring cavity. At least 1 / 2 space of the adjustment mechanism 10 is reserved inside the pouring cavity to reduce the phenomenon of concrete falling out of the pouring cavity during the pouring process. After the pouring is completed, the concrete is cooled. After the concrete cools and solidifies, the movement of the moving trolley 3 on the horizontal rail support 2 drives the outer formwork unit 4 and the inner formwork unit 5 to move together. Then, the next section of the box girder is poured. This process is repeated until the box girder between the two piers 1 is poured and solidified. Then, the horizontal rail support 2, the moving trolley 3, the outer formwork unit 4, and the inner formwork unit 5 can be removed.

[0031] Because the concrete of the box girder is subjected to gravity and comes into full contact with the lower formwork during the solidification process, the friction between the formed box girder and the formwork is relatively large. In order to reduce the friction when the moving trolley 3 moves the outer formwork unit 4 and the inner formwork unit 5, this technical solution improves the structure of the outer formwork unit 4 and the inner formwork unit 5. Specifically, at least one of the outer formwork unit 4 and the inner formwork unit 5 is adjustable. The outer formwork unit 4 can expand away from the pouring cavity, and the inner formwork unit 5 can contract away from the pouring cavity, thereby reducing the direct contact between the formed box girder and the formwork, reducing the friction during the movement of the formwork, and facilitating the movement of the formwork.

[0032] like Figure 1 and Figures 3-4As shown, the adjustment of the outer mold unit 4 and the inner mold unit 5 in this technical solution is preferably the adjustment of the outer mold unit 4. Specifically, the outer mold unit 4 includes a bottom outer mold 14 located below the inner mold unit 5 and two side outer molds 15 located on both sides of the inner mold unit 5. The moving trolley 3 is equipped with an outer mold adjustment assembly connected to the bottom outer mold 14 and the side outer molds 15. The outer mold adjustment assembly can adjust the distance between the bottom outer mold 14 and the inner mold unit 5 as well as the distance between the side outer molds 15 and the inner mold unit 5.

[0033] At this time, after the box girder is formed, the spacing between the bottom outer mold 14 and the inner mold unit 5 and the spacing between the side outer mold 15 and the inner mold unit 5 are adjusted by the outer mold adjustment component, so that the bottom outer mold 14 and the side outer mold 15 expand and move outward, so that the bottom outer mold 14 and the side outer mold 15 are separated from the bottom of the box girder.

[0034] Furthermore, the outer mold adjustment assembly is a structure that can drive the bottom outer mold 14 and the side outer mold 15 to move. Such as hydraulic cylinders, electric push rods 13 and robotic arms that are mounted on the moving trolley 3 and connected to the bottom outer mold 14 and the side outer mold 15, all of which can drive the bottom outer mold 14 and the side outer mold 15 to move and lock the bottom outer mold 14 and the side outer mold 15 after the movement is completed.

[0035] like Figure 1 and Figures 3-5 As shown, the structure of the inner mold unit 5 is disclosed in detail here. Specifically, the inner mold unit 5 includes a connecting frame 12 fixedly connected to the mobile trolley 3. An adjusting bracket unit 18 is fixedly connected to the connecting frame 12. The fixing method can be screw connection. The adjusting bracket unit 18 is equipped with an upper inner mold 16 located on the upper side of the adjusting bracket unit 18, a lower inner mold 11 located on the lower side of the adjusting bracket unit 18, and two side inner molds 17 located on both sides of the adjusting bracket unit 18. The two ends of the upper inner mold 16 are rotatably connected to the upper ends of the two side inner molds 17, and the two ends of the lower inner mold 11 are rotatably connected to the lower ends of the two side inner molds 17, respectively.

[0036] In order to achieve the shrinkage of the inner mold unit 5, both the lower inner mold 11 and the upper inner mold 16 include two first half plates 19. The edges of the two first half plates 19 that are close to each other are rotatably connected, and the edges of the two first half plates 19 that are far from each other are rotatably connected to the upper ends of the two side inner molds 17 respectively. The inner sides of the two first half plates 19 are connected to the adjusting bracket unit 18. The first half plates 19 can be folded by adjusting the bracket unit 18.

[0037] Meanwhile, each of the two side inner molds 17 includes two second half plates 20. The edges of the two side inner molds 17 that are close to each other are rotatably connected, and the edges of the two side inner molds 17 that are far from each other are rotatably connected to the edges of the two first half plates 19 respectively. By rotating the second half plate 20, the side inner molds 17 can be folded and stored. The inner sides of the two side inner molds 17 are connected to the adjustment bracket unit 18. The adjustment bracket unit 18 drives the second half plate 20 to fold.

[0038] Since the connectors at the joints of the two second half plates 20 and the joints at the joints of the two first half plates 19 are located on the outside of the inner mold unit 5, and a flexible protective cover needs to be installed on the outside of the connectors to isolate them from the concrete.

[0039] like Figures 3-6 As shown, the adjustment bracket unit 18 includes a central frame 21 fixedly connected to the connecting frame 12. The central frame 21 is equipped with a first adjustment unit 22 connected to the first half plate 19 and a second adjustment unit 23 connected to the second half plate 20.

[0040] The first adjustment unit 22 includes a linear moving component mounted on the central frame 21. Two U-shaped components 29 are mounted on the linear moving component. Each of the two U-shaped components 29 is rotatably connected to a support rod 30. The ends of the two support rods 30 away from the U-shaped components 29 are rotatably connected to the inner sides of the two first half-plates 19 at positions close to each other. At this time, by driving the two U-shaped components 29 to move linearly and adjusting their positions, the support rods 30 are rotated and tilted, which allows the two first half-plates 19 to fold and retract.

[0041] The linear moving component includes a screw support 24 fixedly connected to the central frame 21. A rotating rod 26 is rotatably connected to the screw support 24. Two symmetrically arranged threaded rods 27 are fixedly connected to the outer side of the rotating rod 26, and the thread directions of the two threaded rods 27 are opposite. Threaded rings 28 are threadedly connected to the outer side of each of the two threaded rods 27, and the threaded rings 28 are rotatably connected to the U-shaped component 29. When the first half plate 19 needs to be folded, the rotating rod 26 can be rotated to drive the two threaded rods 27 to rotate synchronously. When the two threaded rods 27 rotate synchronously, they will drive the two threaded rings 28 to move in opposite directions. The distance between the two threaded rods 27 can be adjusted by the movement of the two threaded rings 28, thereby completing the adjustment of the first half plate 19.

[0042] In order to input kinetic energy into the rotating rod 26, a first motor 25 is fixedly connected to the screw bracket 24. The output end of the first motor 25 is connected to the rotating rod 26. By starting the first motor 25, rotational kinetic energy can be input into the rotating rod 26.

[0043] like Figures 4-7As shown, the second adjustment unit 23 includes a second motor 34 fixedly connected to the central frame 21 and two racks 33 slidably connected to the central frame 21. A gear 35 is fixedly connected to the second motor 34. The two racks 33 are located on both sides of the gear 35, and both racks 33 are meshed with the gear 35. The second motor 34 drives the gear 35 to rotate, which in turn drives the racks 33 to move linearly. The end of the rack 33 is connected to one of the second half plates 20. The movement of the racks 33 drives the second half plate 20 to move.

[0044] Furthermore, in order to accommodate the movement of the second half plate 20 during displacement, a connecting rod 31 is fixedly connected to the second half plate 20. A vertical rail 32, which is vertically arranged and connected to the rack 33, is mounted on the outer side of the connecting rod 31. When the rack 33 moves, it will drive the connecting rod 31 to move through the vertical rail 32. When the second half plate 20 moves, it will adapt to the movement changes of the second half plate 20 by changing the connection position between the connecting rod 31 and the vertical rail 32.

[0045] like Figures 1-2 Figures 1-2 As shown, in order to facilitate the installation of the horizontal rail bracket 2, both ends of the horizontal rail bracket 2 are fixedly connected to column connection units 7. The column connection unit 7 includes a horizontal bracket 8 fixedly connected to the horizontal rail bracket 2. The interior of the horizontal bracket 8 is equipped with two movable sliding arms 9 through the adjustment mechanism 10. The sliding arms 9 are moved by the adjustment mechanism 10 to adjust the distance between the two sliding arms 9, so that the two sliding arms 9 are positioned on both sides of the upper center column 6 of the pier column 1, thus completing the positioning of the horizontal rail bracket 2.

[0046] Here, the adjustment mechanism 10 can be a combination of a motor and a screw. The motor drives the screw to rotate, which in turn moves the sliding arm 9.

[0047] The working principle of this invention is as follows: When pouring the box girder, the horizontal rail support 2 is installed between the two piers 1, and then the moving trolley 3 is moved to a position close to the pier 1. The reinforcing bars are woven into shape inside the pouring cavity, and one end of the reinforcing bars extends to the outside of the pouring cavity. Then, concrete is poured from one end of the pouring cavity, and at least 1 / adjustment mechanism 10 space is reserved inside the pouring cavity to reduce the phenomenon of concrete falling out of the pouring cavity during the pouring process. After the pouring is completed, the concrete is cooled. After the concrete cools and solidifies, the movement of the moving trolley 3 on the horizontal rail support 2 drives the outer mold unit 4 and the inner mold unit 5 to move together. Then, the next section of the box girder is poured. This process is repeated until the box girder between the two piers 1 is poured and solidified. Then, the horizontal rail support 2, the moving trolley 3, the outer mold unit 4 and the inner mold unit 5 can be removed.

[0048] Before the outer mold unit 4 and inner mold unit 5 are moved by the moving trolley 3, the outer mold unit 4 and inner mold unit 5 are adjusted so that the outer mold unit 4 expands away from the pouring cavity and the inner mold unit 5 contracts away from the pouring cavity. This reduces the direct contact between the formed box girder and the template, reduces the friction during the template movement, and facilitates the movement of the template.

[0049] In summary, this technical solution enables the continuous casting of box girders by moving the outer mold unit 4 and the inner mold unit 5 between the two piers 1 using the moving trolley 3. Furthermore, the movement of the outer mold unit 4 and the inner mold unit 5 after the box girder is formed reduces the friction between the template and the box girder during the template movement, facilitating the movement of the template and thus facilitating the continuous casting of the box girder.

[0050] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A box girder formwork that facilitates continuous casting, characterized in that: The system includes a horizontal rail support (2) installed between two piers (1), on which a moving trolley (3) is mounted to move between the two piers (1). The moving trolley (3) is equipped with an outer mold unit (4) and an inner mold unit (5) located inside the outer mold unit (4). A casting cavity is formed between the outer mold unit (4) and the inner mold unit (5). The front, rear, and upper sides of the casting cavity are all open. The outer mold unit (4) expands away from the casting cavity, and the inner mold unit (5) contracts away from the casting cavity. The inner mold unit (5) includes a fixed... A connecting frame (12) is connected to the mobile trolley (3). An adjusting bracket unit (18) is fixedly connected to the connecting frame (12). The adjusting bracket unit (18) is equipped with an upper inner mold (16) located on the upper side of the adjusting bracket unit (18), a lower inner mold (11) located on the lower side of the adjusting bracket unit (18), and two side inner molds (17) located on both sides of the adjusting bracket unit (18). The two ends of the upper inner mold (16) are rotatably connected to the upper ends of the two side inner molds (17), and the two ends of the lower inner mold (11) are rotatably connected to the lower ends of the two side inner molds (17). Both the lower inner mold (11) and the upper inner mold (16) include two first half plates (19). The two first half plates (19) are rotatably connected at their close edges, and the two first half plates (19) are rotatably connected to the upper ends of the two side inner molds (17) at their far edges. The inner sides of the two first half plates (19) are connected to the adjusting bracket unit (18). Both of the side inner molds (17) include two second half plates (20). The sides of the two side inner molds (17) that are close to each other are rotatably connected, and the sides of the two side inner molds (17) that are far from each other are rotatably connected to the sides of the two first half plates (19). The inner sides of both side inner molds (17) are connected to the adjusting bracket unit (18). The adjusting bracket unit (18) includes a central frame (21) fixedly connected to the connecting frame (12). A first adjusting unit (22) connected to the first half plate (19) is mounted on the central frame (21). The first adjusting unit (22) includes a linear moving part mounted on the central frame (21). Two U-shaped parts (29) are mounted on the linear moving part. Each of the two U-shaped parts (29) is rotatably connected to a support rod (30). The ends of the two support rods (30) away from the U-shaped parts (29) are rotatably connected to the inner sides of the two first half plates (19) at positions close to each other. The central frame (21) is also equipped with a second adjustment unit (23) connected to the second half plate (20). The second adjustment unit (23) includes a second motor (34) fixedly connected to the central frame (21) and two racks (33) slidably connected to the central frame (21). A gear (35) is fixedly connected to the second motor (34). The two racks (33) are located on both sides of the gear (35) and both racks (33) are meshed with the gear (35). The ends of the racks (33) are connected to one of the second half plates (20).

2. The box girder formwork for continuous casting according to claim 1, characterized in that: The outer mold unit (4) includes a bottom outer mold (14) located below the inner mold unit (5) and two side outer molds (15) located on both sides of the inner mold unit (5). The mobile trolley (3) is equipped with an outer mold adjustment component connected to the bottom outer mold (14) and the side outer molds (15). The outer mold adjustment component adjusts the distance between the bottom outer mold (14) and the inner mold unit (5) and the distance between the side outer molds (15) and the inner mold unit (5).

3. The box girder formwork for continuous casting according to claim 1, characterized in that: The linear moving part includes a screw support (24) fixedly connected to a central frame (21). A rotating rod (26) is rotatably connected to the screw support (24). Two symmetrically arranged threaded rods (27) are fixedly connected to the outer side of the rotating rod (26), and the thread directions of the two threaded rods (27) are opposite. A threaded ring (28) is threadedly connected to the outer side of each of the two threaded rods (27), and the threaded ring (28) is rotatably connected to a U-shaped part (29). A first motor (25) is fixedly connected to the screw support (24), and the output end of the first motor (25) is connected to the rotating rod (26).

4. A box girder formwork for easy continuous casting according to claim 1, characterized in that: A connecting rod (31) is fixedly connected to the second half plate (20), and a vertical rail (32) is mounted on the outside of the connecting rod (31) and connected to the toothed rack (33).

5. A box girder formwork for easy continuous casting according to claim 1, characterized in that: Both ends of the horizontal rail bracket (2) are fixedly connected to the horizontal bracket (8), and the interior of the horizontal bracket (8) is equipped with two movable sliding arms (9) through the adjustment mechanism (10).

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