High-speed railway precast large box girder formwork

Abstract

The present invention relates to the technical field of high-speed rail precast large box girder formwork, specifically to the high-speed rail precast large box girder formwork. It includes a precast box girder bottom support formwork, and a box girder side support and closing assembly is provided on the surface of the precast box girder bottom support formwork. The box girder side support and closing assembly is used to close both sides of the precast box girder bottom support formwork, and when concrete is poured, it limits the concrete. A formwork pushing and supporting assembly is provided on the surface of the box girder side support and closing assembly. The formwork pushing and supporting assembly is used to push the box formwork to move horizontally and suppress it when the box formwork moves, and limit the tilting angle of the box formwork; by slidingly connecting the box girder side support and closing assembly and the precast box girder bottom support formwork, the box girder side support and closing assembly and the precast box girder bottom support formwork can be quickly fitted together.

Description

Technical Field

[0001] The present invention relates to the technical field of high - speed rail precast large box girder formwork, and specifically, to high - speed rail precast large box girder formwork. Background Art

[0002] Currently, the construction of high - speed rail box girders can generally be divided into precast box girders and cast - in - place box girders. Among them, the precast box girders are precast in an independent site and, combined with a bridge - erecting machine, can be erected after the lower structure of the high - speed rail is completed, which can accelerate the project progress and save the construction period. Therefore, the precast box girders are the most commonly used box girder manufacturing form.

[0003] Regarding the formwork for high - speed rail precast large box girders, there are many existing technologies, for example:

[0004] Chinese Patent Publication No. CN214725218U discloses a mobile integral steel bar binding platform for high - speed rail precast box girders. A longitudinal moving trolley is composed of longitudinal moving wheel sets, longitudinal supporting beams and multiple longitudinal beams. The longitudinal movement is driven by a battery - powered traveling motor to drive the longitudinal moving trolley. The upper part of the longitudinal moving trolley is a longitudinal positioning rod, a structural rod, a U - shaped positioning rod, a wing plate positioning rod and an operation platform connected by assembly bolts. Each positioning rod is positioned through a notch for the size of the steel bar, and the longitudinal full - length steel bars of the web are positioned by rotating positioning pins. When binding steel bars, the entire platform is driven by a motor into the steel bar processing factory, and the steel bars are integrally bound by a bridge crane in cooperation with manual labor. After completion, the platform longitudinally moves out of the steel bar processing factory and is integrally hoisted by a gantry crane into the formwork of the beam - making pedestal for the next process operation. This device has the advantages of high precision, simple structure, strong operation applicability, safety and reliability, and is suitable for the steel bar project of post - tensioned box girders.

[0005] It can be seen from this that currently, the precast box girders adopt the construction method of concrete pedestals, that is, the construction is carried out according to the procedures of binding steel bars, installing formwork, pouring concrete, curing, and removing formwork according to the requirements of the beam body size. However, when installing the formwork, most of the current high - speed rail precast large box girder formworks have the side formwork and the bottom support formwork separated. Forklifts are needed to move the side formworks to make them fit the bottom support formwork. Due to the large size of the high - speed rail box girder, the side formworks are large in volume, affecting the vision of the forklift, resulting in the need for the forklift to adjust the angle for a period of time to align the side formworks and the bottom support formwork. At the same time, when assembling the box formwork, auxiliary pulling equipment is required to pass the box formwork through the inside of the steel bar frame. However, when the pulling equipment assists the box formwork to pass through the inside of the steel bar frame, since there is no component to stabilize the box formwork in the pulling device, the box formwork may shake, come into contact with the steel bar frame, and get stuck inside the steel bar frame, affecting the production efficiency.

[0006] In view of this, the present invention provides a high - speed rail precast large box girder formwork. Summary of the Invention

[0007] The purpose of the present invention is to provide a high-speed railway prefabricated large box girder template to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the purpose of the present invention is to provide a high-speed railway prefabricated large box girder formwork, including a pre-supported box girder bottom support formwork, the surface of the pre-supported box girder bottom support formwork is provided with a box girder side support closing component, the box girder side support closing component is used to close the two sides of the pre-supported box girder bottom support formwork, and limit the concrete when pouring concrete, the surface of the box girder side support closing component is provided with a template pushing support component, the template pushing support component is used to push the box formwork to move laterally, suppress the box formwork when moving, and limit the tilting angle of the box formwork, the surface of the box girder side support closing component is provided with a template moving stabilizing component, the template moving stabilizing component is used to assist the movement of the box formwork, reduce the friction between the box formwork and the box girder side support closing component, so that the box formwork, when pushed by the template pushing support component, rotates with the template moving stabilizing component into the interior of the pre-supported box girder bottom support formwork.

[0009] As a further improvement of the present technical solution, the box girder side support closing assembly includes a first threaded rod, which is rotatably connected to the bottom support formwork of the pre-supported box girder, and a driving device for driving the first threaded rod to rotate is provided inside the bottom support formwork of the pre-supported box girder.

[0010] As a further improvement of the technical solution, two closed frames are threadedly connected to the surface of the first threaded rod, and the two closed frames are slidably connected to the bottom support formwork of the pre-supported box beam to limit the moving path of the closed frames. The internal thread grooves of the two closed frames are in opposite directions. When the first threaded rod is rotated, the two closed frames move in opposite directions. Moving wheels are provided on the surfaces of the closed frames.

[0011] As a further improvement of the present technical solution, the template pushing support assembly includes an extension plate, which is installed on the surface of the closed frame. A rotating roller is rotatably connected inside the extension plate, and a driving motor is provided inside the extension plate to drive the rotating roller to rotate.

[0012] As a further improvement of the technical solution, a steel belt is meshed on the surface of the rotating roller, the rotating roller is connected through a steel belt transmission, a first elastic member is installed on the surface of the steel belt, and the other end of the first elastic member is connected to a push roller.

[0013] As a further improvement of the technical solution, a second threaded rod is rotatably connected inside the closed frame, a movable plate is threadedly connected to the surface of the second threaded rod, and the movable plate and the closed frame are slidably connected to limit the moving path of the movable plate.

[0014] As a further improvement of the technical solution, an elastic auxiliary wheel is installed inside the moving plate, and a first motor for driving the second threaded rod to rotate is installed on the surface of the closed frame.

[0015] As a further improvement of the technical solution, the template moving stability assembly includes a third threaded rod, the third threaded rod is slidably connected to the closed frame, a first fixing frame is threadedly connected to the surface of the third threaded rod, the first fixing frame is slidably connected to the closed frame for limiting the moving path of the first fixing frame, a first stabilizing wheel is installed at the bottom of the first fixing frame, and a second motor for driving the third threaded rod to rotate is installed on the surface of the closed frame.

[0016] As a further improvement of the technical solution, a fourth threaded rod is rotatably connected inside the closed frame, a second fixing frame is rotatably connected to the surface of the fourth threaded rod, the second fixing frame is slidably connected to the closed frame for limiting the moving path of the second fixing frame, a second stabilizing wheel is installed on the surface of the second fixing frame, a gear disk is installed at the bottom of the fourth threaded rod, and a third motor for driving the gear disk to rotate is provided on the surface of the closed frame, and the rotating head of the third motor meshes with the gear disk to drive the fourth threaded rod to rotate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the high-speed rail precast large box girder formwork, the box girder side support and closure assembly is slidably connected to the precast box girder bottom support formwork, enabling the box girder side support and closure assembly to quickly fit with the precast box girder bottom support formwork. This avoids the need to use a forklift to move the two side formworks during formwork installation to make them fit with the bottom support formwork. Since the high-speed rail box girder is large, the two side formworks are large in volume, affecting the forklift's field of vision and causing the forklift to take time to adjust the angle to align the two side formworks with the bottom support formwork, thus improving the formwork installation efficiency.

[0019] 2. In the high-speed rail precast large box girder formwork, the formwork pushing and supporting assembly and the formwork moving stability assembly quickly push the box formwork into the precast box girder bottom support formwork and suppress and limit the movement of the box formwork during movement. This avoids the possibility of the box formwork shaking during the assembly of the box formwork, contacting the steel bar frame and getting stuck inside the steel bar frame, which affects the production efficiency, thereby improving the stability of the box formwork during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the schematic diagram of the first threaded rod of the structure of the present invention;

[0022] Figure 3 Schematic diagram of the structure enclosure of the present invention;

[0023] Figure 4 Structure of the present invention Figure 3 Schematic diagram of location A of

[0024] Figure 5 Schematic diagram of the structure extension plate of the present invention;

[0025] Figure 6 Structure of the present invention Figure 5 Schematic diagram of location B of

[0026] Figure 7 Schematic diagram of the structure rotating roller of the present invention;

[0027] Figure 8 Schematic diagram of the structure steel strip of the present invention.

[0028] The meanings of each label in the figure are as follows:

[0029] 10. Bottom support formwork of the precast box girder;

[0030] 20. Side support and enclosure assembly of the box girder; 21. First threaded rod; 22. Enclosure; 23. Moving wheel;

[0031] 30. Formwork pushing and supporting assembly; 31. Extension plate; 32. Rotating roller; 33. Steel strip; 34. First elastic member; 35. Pushing roller; 36. Second threaded rod; 37. Moving plate; 38. Elastic auxiliary wheel; 39. First motor;

[0032] 40. Formwork moving and stabilizing assembly; 41. Third threaded rod; 42. First fixing frame; 43. First stabilizing wheel; 44. Second motor; 45. Fourth threaded rod; 46. Second fixing frame; 47. Second stabilizing wheel; 48. Gear disc; 49. Third motor. Detailed implementation manners

[0033] Embodiment 1

[0034] The precast box girder adopts the construction method of concrete pedestal, that is, according to the requirements of the beam body size, the construction is carried out in the procedures of binding steel bars, installing formwork, pouring concrete, curing, and removing formwork. However, when installing the formwork, most of the current high-speed rail precast large box girder forms are such that the two side forms and the bottom support form are separated. Forklifts are needed to move the two side forms to make them fit the bottom support form. Due to the large size of the high-speed rail box girder, the two side forms are large in volume, which affects the vision of the forklift, resulting in the need for the forklift to spend time adjusting the angle to align the two side forms and the bottom support form. At the same time, when assembling the box formwork, a pulling device is needed for assistance to pass the box formwork through the inside of the steel bar frame. However, when the pulling device assists the box formwork to pass through the inside of the steel bar frame, since there is no component to stabilize the box formwork in the pulling device, the box formwork may shake, come into contact with the steel bar frame, and get stuck inside the steel bar frame, affecting the production efficiency.

[0035] Please refer to Figures 1 - 8 As shown, the purpose of this embodiment is to provide a high-speed rail precast large box girder form, including a precast box girder bottom support form 10. A box girder side support and closing component 20 is provided on the surface of the precast box girder bottom support form 10. The box girder side support and closing component 20 is used to close the two sides of the precast box girder bottom support form 10 and limit the concrete during concrete pouring. A form pushing and supporting component 30 is provided on the surface of the box girder side support and closing component 20. The form pushing and supporting component 30 is used to push the box formwork to move horizontally and press the box formwork during movement to limit the tilting angle of the box formwork. A form moving and stabilizing component 40 is provided on the surface of the box girder side support and closing component 20. The form moving and stabilizing component 40 is used to assist the movement of the box formwork, reduce the friction between the box formwork and the box girder side support and closing component 20, so that when the box formwork is pushed by the form pushing and supporting component 30, it rotates into the inside of the precast box girder bottom support form 10 along with the form moving and stabilizing component 40.

[0036] The improvement of this embodiment lies in that: by the sliding connection between the box girder side support and closing component 20 and the precast box girder bottom support form 10, the box girder side support and closing component 20 and the precast box girder bottom support form 10 can be quickly fitted together, avoiding the need to use a forklift to move the two side forms to make them fit the bottom support form during form installation. Due to the large size of the high-speed rail box girder, the two side forms are large in volume, which affects the vision of the forklift, resulting in the need for the forklift to spend time adjusting the angle to align the two side forms and the bottom support form;

[0037] The box formwork is quickly pushed into the bottom support formwork 10 of the pre-supported box beam through the formwork pushing support assembly 30 and the formwork moving stabilizing assembly 40, and the box formwork is suppressed and limited when moving to avoid the box formwork shaking during assembly, causing contact with the steel frame, getting stuck inside the steel frame, and affecting production efficiency.

[0038] The box beam side support closing assembly 20 includes a first threaded rod 21, the first threaded rod 21 is rotatably connected to the pre-supported box beam bottom support template 10, the pre-supported box beam bottom support template 10 is provided with a driving device for driving the first threaded rod 21 to rotate, the surface of the first threaded rod 21 is threadedly connected to two closing frames 22, the two closing frames 22 are slidably connected to the pre-supported box beam bottom support template 10, and are used to limit the moving path of the closing frames 22, the internal thread grooves of the two closing frames 22 are in opposite directions, when the first threaded rod 21 rotates, the two closing frames 22 move in opposite directions, and the surface of the closing frames 22 is provided with moving wheels 23;

[0039] The template pushing support assembly 30 includes an extension plate 31, which is mounted on the surface of the closed frame 22. A rotating roller 32 is rotatably connected inside the extension plate 31. A driving motor for driving the rotating roller 32 to rotate is arranged inside the extension plate 31. A steel belt 33 is meshed on the surface of the rotating roller 32. The rotating roller 32 is connected through the steel belt 33. A first elastic member 34 is mounted on the surface of the steel belt 33. A pushing roller 35 is connected to the other end of the first elastic member 34. A second threaded rod 36 is rotatably connected inside the closed frame 22. A moving plate 37 is threadedly connected on the surface of the second threaded rod 36. The moving plate 37 is slidably connected to the closed frame 22 for limiting the moving path of the moving plate 37. An elastic auxiliary wheel 38 is mounted inside the moving plate 37. A first motor 39 for driving the second threaded rod 36 to rotate is mounted on the surface of the closed frame 22.

[0040] The template moving and stabilizing assembly 40 includes a third threaded rod 41, which is slidably connected to the closed frame 22. The surface of the third threaded rod 41 is threadedly connected to the first fixed frame 42, and the first fixed frame 42 is slidably connected to the closed frame 22, which is used to limit the moving path of the first fixed frame 42. A first stabilizing wheel 43 is installed at the bottom of the first fixed frame 42. A second motor 44 for driving the third threaded rod 41 to rotate is installed on the surface of the closed frame 22. A fourth threaded rod 45 is rotatably connected inside the closed frame 22, and a second fixed frame 46 is rotatably connected to the surface of the fourth threaded rod 45. The second fixed frame 46 is slidably connected to the closed frame 22, which is used to limit the moving path of the second fixed frame 46. A second stabilizing wheel 47 is installed on the surface of the second fixed frame 46. A gear plate 48 is installed at the bottom of the fourth threaded rod 45. A third motor 49 for driving the gear plate 48 to rotate is provided on the surface of the closed frame 22. The rotating head of the third motor 49 is engaged with the gear plate 48, thereby driving the fourth threaded rod 45 to rotate.

[0041] As described above, the working principle of this solution is as follows: When prefabricating high-speed rail box girders, first, a framework is made of steel bars on the surface of the bottom support formwork 10 of the precast box girder. Then, the driving device of the first threaded rod 21 is started to make it work, thereby driving the first threaded rod 21 to rotate. The rotation of the first threaded rod 21 drives the closed frame 22 to move. After the closed frame 22 moves, the steel rope inside the framework is passed through the concave holes on the surface of the closed frame 22;

[0042] Then, the box formwork is placed on the surface of the pushing roller 35. At the same time, the first motor 39 is started to make it work. The work of the first motor 39 drives the second threaded rod 36 to rotate. The rotation of the second threaded rod 36 causes the moving plate 37 to move. The movement of the moving plate 37 makes the elastic auxiliary wheel 38 move downward. During the downward movement of the elastic auxiliary wheel 38, an elastic force is generated to press against the surface of the box formwork. Then, the second motor 44 is started to make it work. The work of the second motor 44 drives the third threaded rod 41 to rotate. The rotation of the third threaded rod 41 causes the first fixing frame 42 to move downward. The downward movement of the first fixing frame 42 makes the first stabilizing wheel 43 move downward, so that the first stabilizing wheel 43 fits against the box formwork. Then, the third motor 49 is rotated to make it work. The work of the third motor 49 drives the gear disk 48 to rotate. The rotation of the gear disk 48 drives the fourth threaded rod 45 to rotate. The rotation of the fourth threaded rod 45 drives the second fixing frame 46 to move upward. The upward movement of the second fixing frame 46 drives the second stabilizing wheel 47 to move upward, so that the second stabilizing wheel 47 fits against the surface of the box formwork. Finally, the driving motor inside the extension plate 31 is started to make it work. The work of the driving motor drives the rotating roller 32 to rotate. The rotation of the rotating roller 32 drives the steel belt 33 to move. During the movement of the steel belt 33, the first elastic member 34 generates an elastic force to push the pushing roller 35 to fit against the box formwork. The pushing roller 35 is driven to move by the steel belt 33, thereby driving the box formwork to move into the bottom support formwork 10 of the precast box girder. After the box formwork moves to the designated position, concrete is poured. After pouring, the box formwork is withdrawn and the closed frame 22 moves away from the bottom support formwork 10 of the precast box girder, and the generation of the box girder formwork can be completed.

[0043] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. High-speed railway precast large box girder formwork, characterized in that: It comprises a pre-supported box girder bottom support template (10), the surface of the pre-supported box girder bottom support template (10) is provided with a box girder side support closing component (20), the box girder side support closing component (20) is used to close both sides of the pre-supported box girder bottom support template (10), and limit the concrete when pouring concrete, the surface of the box girder side support closing component (20) is provided with a template pushing support component (30), the template pushing support component (30) is used to push the box template to move horizontally, suppress the box template when moving, and limit the tilting angle of the box template, the surface of the box girder side support closing component (20) is provided with a template moving stabilizing component (40), the template moving stabilizing component (40) is used to assist the movement of the box template, reduce the friction between the box template and the box girder side support closing component (20), so that when the box template is pushed by the template pushing support component (30), it rotates with the template moving stabilizing component (40) and enters the interior of the pre-supported box girder bottom support template (10); The box beam side support closed assembly (20) comprises a first threaded rod (21), the first threaded rod (21) is rotatably connected to the pre-supported box beam bottom support template (10), and a driving device for driving the first threaded rod (21) to rotate is provided inside the pre-supported box beam bottom support template (10); two closed frames (22) are threadedly connected to the surface of the first threaded rod (21), and the two closed frames (22) are slidably connected to the pre-supported box beam bottom support template (10) to limit the moving path of the closed frames (22); the internal thread grooves of the two closed frames (22) are in opposite directions, and when the first threaded rod (21) rotates, the two closed frames (22) move in opposite directions, and the surfaces of the closed frames (22) are provided with moving wheels (23); The template pushing support assembly (30) comprises an extension plate (31), the extension plate (31) is mounted on the surface of the closed frame (22), a rotating roller (32) is rotatably connected inside the extension plate (31), and a driving motor for driving the rotating roller (32) to rotate is provided inside the extension plate (31); the template moving stabilizing assembly (40) comprises a third threaded rod (41), the third threaded rod (41) is slidably connected to the closed frame (22), a first fixing frame (42) is threadedly connected on the surface of the third threaded rod (41), and the first fixing frame (42) The first fixing frame (42) is slidably connected to the closing frame (22) and is used to limit the moving path of the first fixing frame (42); a first stabilizing wheel (43) is installed at the bottom of the first fixing frame (42); a second motor (44) for driving the third threaded rod (41) to rotate is installed on the surface of the closing frame (22); a steel belt (33) is meshed on the surface of the rotating roller (32); the rotating roller (32) is connected to the first fixing frame (42) through the steel belt (33); a first elastic member (34) is installed on the surface of the steel belt (33); and a pushing roller (35) is connected to the other end of the first elastic member (34).

2. The high-speed rail precast large box girder formwork according to claim 1, characterized in that: A second threaded rod (36) is rotatably connected inside the enclosing frame (22). A moving plate (37) is threadedly connected to the surface of the second threaded rod (36). The moving plate (37) is slidably connected to the enclosing frame (22) for limiting the moving path of the moving plate (37).

3. The high-speed rail precast large box girder formwork according to claim 2, characterized in that: An elastic auxiliary wheel (38) is installed inside the moving plate (37). A first motor (39) for driving the second threaded rod (36) to rotate is installed on the surface of the enclosing frame (22).

4. The high-speed rail precast large box girder formwork according to claim 1, characterized in that: A fourth threaded rod (45) is rotatably connected inside the enclosing frame (22). A second fixing frame (46) is rotatably connected to the surface of the fourth threaded rod (45). The second fixing frame (46) is slidably connected to the enclosing frame (22) for limiting the moving path of the second fixing frame (46). A second stabilizing wheel (47) is installed on the surface of the second fixing frame (46). A gear disc (48) is installed at the bottom of the fourth threaded rod (45). A third motor (49) for driving the gear disc (48) to rotate is provided on the surface of the enclosing frame (22). The rotating head of the third motor (49) is engaged with the gear disc (48) to drive the fourth threaded rod (45) to rotate.

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