A guide device suitable for different box girder inner forms

Abstract

The present application relates to box girder pouring formwork technical field, specifically to a kind of guide device suitable for different box girder inner mold, including guide rail and supporting mechanism, improve construction safety, positioning accuracy and the turnover rate of mould by the cooperation of guide rail and roller, shorten construction period. By ejector rod from both sides to guide rail, effectively avoid guide rail to shake, improve stability when moving;And install ball at the end of ejector rod, convert the sliding friction between roller and guide rail in traditional scheme into the rolling friction between ball and guide rail, reduce moving resistance, reduce wear, make the axial movement of inner mold more labor-saving, smooth, while prolong the service life of formwork system. By setting centering assembly and height adjusting assembly, when guide rail is deformed and cross beam is settled, guide rail can be provided with stable supporting force, effectively avoid the jam, wear and bump when inner mold moves, ensure the reliability and smoothness of inner mold moving process.

Description

Technical Field

[0001] This invention relates to the field of box girder casting formwork technology, specifically to a guiding device suitable for different box girder inner molds. Background Technology

[0002] In the fabrication of precast box girders for bridge engineering, traditional formwork systems generally employ a hoisting-based operation mode. In this mode, the inner formwork is a single, rigid structure. After the casting and curing of a box girder are completed, large lifting equipment is used to hoist the inner formwork entirely out of the outer formwork. After disassembly and transportation to a new girder fabrication platform, it is then reassembled. This transportation process requires frequent use of heavy lifting equipment, resulting in lengthy construction time. Furthermore, the process of disassembling and assembling the inner formwork is cumbersome, impacting construction efficiency and the turnover rate of the formwork system.

[0003] To address this, existing technologies have proposed self-propelled internal formwork systems. These systems utilize multiple roller sets laid on the outer formwork and fixed guide rails at the bottom of the inner formwork. A winch drives the inner formwork axially, and the rollers provide stable support while simultaneously limiting the guide rails to prevent horizontal swaying. This eliminates the cumbersome hoisting process and, to some extent, accelerates construction progress and formwork turnover. However, the following problems remain: First, this system requires high integrity of the guide rails. If the guide rails bend or deform, severe wear occurs between the sides of the guide rails and the rollers during inner formwork movement, shortening the lifespan of the formwork system. Secondly, the system has high requirements for the smoothness of track installation and the consistency of elevation of multiple roller support points. When uneven settlement or local deformation of the track occurs, it is very easy to cause the failure of one or more support points, causing the inner formwork to bump and shake during movement, and even posing a safety hazard of derailment. In addition, the existing self-propelled formwork usually has a fixed structure and size of inner and outer formwork. When it is necessary to prefabricate box girders of different cross-sections, the entire set of molds must be replaced or a large-scale modification must be carried out. The conversion work is time-consuming and labor-intensive, the equipment has poor adaptability, and it cannot meet the production needs of rapid conversion of multi-beam types during construction. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a guiding device suitable for different box girder inner formworks. This formwork solves the stability problems of easy bumping, wear, and even derailment during inner formwork movement, as well as the problem of reduced service life due to wear. It also solves the problem that existing formwork systems cannot adapt to different beam types.

[0005] The present invention provides a guiding device suitable for different box girder inner molds, which adopts the following technical solution, including:

[0006] The guide rail extends along the first direction and is fixedly connected to the bottom of the inner mold;

[0007] Multiple support mechanisms are provided, and the multiple support mechanisms are spaced apart along a first direction. The support mechanisms are detachably connected to the outer mold. The support mechanism includes a crossbeam and a first support unit. The crossbeam extends along a second direction, which is perpendicular to the first direction.

[0008] The first support unit includes a support frame, rollers, push rods, and balls. The support frame is connected to the crossbeam, and the rollers are rotatably mounted on the support frame with their rotation axis extending along a second direction. The middle part of the roller's axial direction has a small diameter section with a diameter smaller than the end diameter, and the length of the small diameter section in the second direction is greater than the width of the guide rail in the second direction. Two push rods are provided, and the two push rods are coaxially arranged with their axes extending along the second direction. The ends of the two push rods that are far apart from each other are fixedly connected to the support frame. The balls are rotatably mounted on the ends of the two push rods that are close to each other. The distance between the two balls is equal to the width of the guide rail in the second direction.

[0009] Optionally, two guide rails are fixedly connected below the inner mold. The two guide rails are spaced apart along the second direction. The support mechanism includes two first support units, which are spaced apart along the second direction on the crossbeam and correspond to the two guide rails respectively.

[0010] Optionally, the first support unit further includes a mounting frame and an alignment component; the mounting frame is slidably mounted on the crossbeam along the second direction; rollers are rotatably mounted on the mounting frame; the support frame is movably connected to the crossbeam along the second direction; the alignment component is used to keep the support frame and the mounting frame aligned in the second direction.

[0011] Optionally, the centering component includes a slider, a first spring, and a second spring; the support frame includes two support plates; the two support plates are spaced apart along a second direction and slidably mounted on the crossbeam along the second direction, and two push rods are respectively fixedly connected to the sides of the two support plates that are close to each other; the slider is slidably mounted on the crossbeam along the second direction, the slider is located between the two support plates, and the mounting bracket is connected to the slider; two of each of the first and second springs are provided, and both the first and second springs extend along the second direction; the two ends of the first spring are respectively fixedly connected to the slider and the support plate; the two ends of the second spring are respectively fixedly connected to the crossbeam and the support plate; the second spring has a tendency to bring the support plate closer to the slider; the first spring has a tendency to make the slider move away from the support plate.

[0012] Optionally, the mounting bracket is slidably mounted on the slider; the first support unit further includes a locking component, a height adjustment component, and a transmission component; the locking component has a locked state and an unlocked state, and when the locking component is in the unlocked state, the mounting bracket can move away from or closer to the slider; when the locking component is in the locked state, the distance between the mounting bracket and the slider is locked; the height adjustment component is used to adjust the height of the mounting bracket when the locking component is in the unlocked state; the support mechanism further includes two second support units; the second support units have the same structure as the first support unit; in the first direction, the second support units are disposed on one side of the first support units, and there is a preset distance between them; in the second direction, the two second support units are respectively aligned with the two first support units; the transmission component is used to switch the state of the corresponding locking component; at least one of the locking components in the first support unit and the second support unit on the same side is in the locked state.

[0013] Optionally, the slider is hollow, defining an adjustment cavity filled with hydraulic oil; the locking assembly includes a turntable and a movable disc; the movable disc is fixedly connected to the mounting bracket and is slidably mounted in the adjustment cavity; a first hole is provided on the movable disc; the turntable is rotatably mounted on the movable disc and has a second hole; when the first hole is aligned with the second hole, the locking assembly is in an unlocked state; when the first hole and the second hole are misaligned, the locking assembly is in a locked state; initially, the first hole and the second hole in the first support unit are connected; a preset angle exists between the first hole and the second hole in the second support unit.

[0014] Optionally, the height adjustment assembly includes a shaft bracket, a first adjusting spring, and a second adjusting spring. The shaft bracket is slidably connected to the crossbeam, and the two ends of the first adjusting spring abut against the shaft bracket and the crossbeam respectively, causing the shaft bracket to tend to move away from the crossbeam. A roller is synchronously connected to a rotating shaft, which is rotatably mounted on the mounting frame and is rotatably and vertically mounted on the support plate. The two ends of the rotating shaft are rotatably connected to the shaft bracket. The second adjusting spring is disposed between the mounting frame and the slider, and its two ends abut against the mounting frame and the slider respectively, causing the mounting frame to tend to move away from the slider.

[0015] Optionally, the transmission assembly includes a driving wheel, a driven wheel, a worm, and a worm gear; the driving wheel is synchronously rotatably connected to the roller; the driven wheel is rotatably mounted on the mounting bracket and meshes with the driving wheel; the worm is synchronously rotatably connected to the driven wheel, and the worm gear is synchronously rotatably connected to the turntable and meshes with the worm; a synchronous pulley is synchronously rotatably connected to the rotating shaft; in the second direction, two synchronous pulleys on the same side are connected by a synchronous belt drive, and the synchronous belt is connected to a tensioning structure, which is used to keep the synchronous belt taut.

[0016] Optionally, the rotating shafts of the two first support units in a support mechanism are coaxial and fixedly connected; one second support unit is located on one side of the first support unit in the first direction, and the other second support unit is located on the other side of the first support unit in the first direction.

[0017] Optionally, the outer mold includes an outer bottom mold, two outer corner modules, two outer side molds, and two end molds; the axis of the outer bottom mold extends along a first direction; the two outer corner modules are detachably and fixedly connected to both sides of the outer bottom mold in a second direction; the two outer side molds are detachably and fixedly connected to the two outer corner modules; and the two end molds are detachably and fixedly connected to both sides of the outer bottom mold in the first direction.

[0018] The inner mold includes a base, an inner top mold, two inner corner modules, and two inner side molds; the axis of the base extends along a first direction; the inner top mold is movably connected to the base, and the two inner side molds are rotatably connected to both sides of the inner top mold in a second direction; the two inner corner modules are detachably rotatably connected to both sides of the second direction; a hydraulic system is installed on the base, which is used to drive the inner top mold to move up and down and the inner side molds and inner corner modules to rotate.

[0019] The beneficial effects of this invention are as follows: This invention provides a guiding device suitable for different box girder inner molds. Through the cooperation of guide rails and rollers, it provides stable support for the axial movement of the inner mold, ensuring that the inner mold can be smoothly fed into or withdrawn from the outer mold. This reduces operational difficulty, avoids collisions and wear, improves construction safety, positioning accuracy, and mold turnover rate, and shortens the construction period. By setting two coaxial push rods to press the guide rails from both sides, it effectively prevents the guide rails from shaking in the second direction, improving stability during movement. Furthermore, by installing ball bearings at the ends of the push rods, the sliding friction between the rollers and guide rails in traditional solutions is converted into rolling friction between the ball bearings and guide rails, reducing movement resistance, minimizing wear, and making the axial movement of the inner mold more effortless and smooth, while also extending the service life of the formwork system.

[0020] Furthermore, by allowing the mounting bracket and support bracket to slide in the second direction, in conjunction with the centering component, when the guide rail undergoes local deformation, the centering mechanism can automatically adjust the relative position of the mounting bracket and support bracket, ensuring that the midpoint of the roller in the second direction is always located in the same vertical plane as the midpoint of the guide rail in the second direction. This ensures that the small diameter section of the roller in the axial middle is always aligned with the guide rail, thereby avoiding friction between the guide rail side and the roller, and preventing uneven force on the roller from affecting its service life. It also effectively avoids jamming and wear during the movement of the inner mold, ensuring operational reliability and smoothness.

[0021] Furthermore, by setting up a height adjustment component, in conjunction with a locking component and a transmission component, when the crossbeam or support rod settles, or when the lower surface of the guide rail is dented or bulged due to impact, the friction between the guide rail and the roller is used to adjust the state of the locking component, so that at least one of the locking components in the first support unit and the second support unit is in a locked state. When the locking component is in an unlocked state, the height of the roller is adjusted to a state of contact with the lower surface of the guide rail under the downward pressure of the guide rail, its own weight, and the elastic force of the first and second adjusting springs. At the same time, the other locking component is in a locked state, and the height of its corresponding roller cannot be adjusted, providing support for the guide rail, and the friction between the roller and the guide rail is the power source. As the guide rail moves, the state of the locking component is constantly switched, thereby achieving seamless handover and smooth transition of the support point when the inner mold moves on the locally deformed guide rail, thus solving the problems of sinking, bumping, jamming, or even derailment caused by the lack of support force of the inner mold.

[0022] Furthermore, by setting the rollers of the two first support units in the support mechanism to be aligned in pairs and rotate synchronously, and by staggering the two second support units in the first direction, the rigidity and stability of the roller bracket are enhanced, ensuring that the inner mold remains smooth and free from jamming during movement and support, thereby ensuring the structural safety and operational reliability of the long-size inner mold system.

[0023] Furthermore, by setting replaceable outer and inner corner modules, these modules can be replaced during processing according to production needs, thus adapting to the production of different types of box girders. This solves the problem of traditional casting formwork having limited adaptability and being unable to quickly switch between different beam types, improving formwork utilization and construction efficiency, and reducing equipment costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of a guiding device applicable to different box girder inner molds according to the present invention;

[0026] Figure 2 This is a schematic diagram of the installation of the support mechanism in a guide device applicable to different box girder inner molds according to the present invention;

[0027] Figure 3This is an exploded view of the first support unit in a guiding device applicable to different box girder inner molds according to the present invention;

[0028] Figure 4 This is a top view of a guiding device applicable to different box girder inner molds according to the present invention;

[0029] Figure 5 for Figure 4 Sectional view of section AA;

[0030] Figure 6 for Figure 4 Sectional view of section BB;

[0031] Figure 7 This is a schematic diagram of the outer mold and inner mold in a guiding device applicable to different box girder inner molds according to the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the inner mold, hydraulic system and box girder in a guiding device applicable to different box girder inner molds according to the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the inner mold in a guiding device applicable to different box girder inner molds according to the present invention;

[0034] Figure 10 This is a schematic diagram of the inner mold and support mechanism in a guiding device applicable to different box girder inner molds according to the present invention.

[0035] In the picture:

[0036] 100. Guide rail;

[0037] 200. Support mechanism; 210. Crossbeam; 211. Support rod; 220. First support unit; 221. Support frame; 222. Roller; 223. Top rod; 224. Ball bearing; 225. Mounting bracket; 230. Centering assembly; 231. Slider; 232. First spring; 233. Second spring; 240. Locking assembly; 241. Turntable; 242. Moving disc; 243. First hole; 244. Second hole; 250. Height adjustment assembly; 251. Shaft bracket; 252. First adjusting spring; 253. Second adjusting spring; 254. Rotating shaft; 260. Transmission assembly; 261. Driving wheel; 262. Driven wheel; 263. Worm gear; 264. Worm wheel; 265. Synchronous pulley; 266. Synchronous belt; 270. Second support unit.

[0038] 300. Inner mold; 310. Base; 320. Inner top mold; 330. Inner corner module; 340. Inner side mold; 350. Hydraulic system;

[0039] 400, Outer mold; 410, Outer bottom mold; 420, Outer corner module; 430, Outer side mold;

[0040] 500. Box girder. Detailed Implementation

[0041] 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, and 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.

[0042] like Figures 1 to 10 As shown, an embodiment of the present invention provides a guiding device suitable for different box girder inner molds, including a guide rail 100 and a support mechanism 200;

[0043] The guide rail 100 extends along the first direction and is fixedly connected to the bottom of the inner mold 300;

[0044] Multiple support mechanisms 200 are provided, and the multiple support mechanisms 200 are spaced apart along a first direction. The support mechanisms 200 are detachably connected to the outer mold 400. The support mechanism 200 includes a crossbeam 210 and a first support unit 220. The crossbeam 210 extends along a second direction, which is perpendicular to the first direction. The lower end of the crossbeam 210 is fixedly connected to a support rod 211, which extends vertically and is detachably fixedly connected to the outer mold 400.

[0045] The first support unit 220 includes a support frame 221, rollers 222, push rods 223, and balls 224. The support frame 221 is connected to the crossbeam 210. The rollers 222 are rotatably mounted on the support frame 221, with their rotation axis extending along a second direction. The middle part of the rollers 222 has a small diameter section with a diameter smaller than the end diameter, and the length of the small diameter section in the second direction is greater than the width of the guide rail 100 in the second direction. Two push rods 223 are provided, and the two push rods 223 are coaxially arranged with their axis extending along the second direction. The ends of the two push rods 223 that are far apart from each other are fixedly connected to the support frame 221. The balls 224 are rotatably mounted on the ends of the two push rods 223 that are close to each other. The distance between the two balls 224 is equal to the width of the guide rail 100 in the second direction.

[0046] This invention provides stable support for the axial movement of the inner mold 300 through the cooperation of the guide rail 100 and the roller 222, ensuring that the inner mold 300 can be smoothly fed into or withdrawn from the outer mold 400. This reduces operational difficulty, avoids collision and wear, improves construction safety, positioning accuracy, and mold turnover rate, and shortens the construction period. By setting two coaxial push rods 223 to press the guide rail 100 from both sides, the wobbling of the guide rail 100 in the second direction is effectively prevented, improving stability during movement. Furthermore, ball bearings 224 are installed at the ends of the push rods 223, converting the sliding friction between the roller 222 and the guide rail 100 in the traditional solution into rolling friction between the ball bearings 224 and the guide rail 100. This reduces movement resistance, minimizes wear, and makes the axial movement of the inner mold 300 more effortless and smooth, while also extending the service life of the template system.

[0047] In a further embodiment, two guide rails 100 are fixedly connected below the inner mold 300. The two guide rails 100 are spaced apart along the second direction. A support mechanism 200 includes two first support units 220. The two first support units 220 are spaced apart along the second direction on the crossbeam 210 and correspond to the two guide rails 100 respectively.

[0048] By setting two parallel guide rails 100 and corresponding first support units 220, more stable support is provided, improving the balance and stability of the inner mold 300 when it moves, avoiding jamming or safety accidents caused by center of gravity shift, and ensuring the reliability of long-stroke movement.

[0049] In a further embodiment, the first support unit 220 further includes a mounting frame 225 and an alignment component 230; the mounting frame 225 is slidably mounted on the crossbeam 210 along a second direction; the roller 222 is rotatably mounted on the mounting frame 225; the support frame 221 is movably connected to the crossbeam 210 along the second direction; and the alignment component 230 is used to keep the support frame 221 and the mounting frame 225 aligned in the second direction.

[0050] The centering component 230 includes a slider 231, a first spring 232, and a second spring 233; the support frame 221 includes two support plates; the two support plates are spaced apart along a second direction and are slidably mounted on the crossbeam 210 along the second direction, and two push rods 223 are respectively fixedly connected to the sides of the two support plates that are close to each other; the slider 231 is slidably mounted on the crossbeam 210 along the second direction, the slider 231 is located between the two support plates, and the mounting bracket 225 is connected to the slider 231; there are two of each of the first spring 232 and the second spring 233, and both the first spring 232 and the second spring 233 extend along the second direction; the two ends of the first spring 232 are respectively fixedly connected to the slider 231 and the support plate; the two ends of the second spring 233 are respectively fixedly connected to the crossbeam 210 and the support plate; the second spring 233 has a tendency to bring the support plate closer to the slider 231; the first spring 232 has a tendency to make the slider 231 move away from the support plate.

[0051] By allowing the mounting bracket 225 and support bracket 221 to slide in the second direction, and in conjunction with the centering component 230, when the guide rail 100 undergoes local deformation, the centering mechanism can automatically adjust the relative position of the mounting bracket 225 and support bracket 221, ensuring that the midpoint of the roller 222 in the second direction is always located in the same vertical plane as the midpoint of the guide rail 100 in the second direction. This ensures that the small diameter section of the roller 222 in the axial middle is always aligned with the guide rail 100, thereby avoiding friction between the side of the guide rail 100 and the roller 222, and preventing uneven force on the roller 222 from affecting its service life. This effectively avoids jamming and wear when the inner mold 300 moves, ensuring operational reliability and smoothness.

[0052] In a further embodiment, the mounting bracket 225 is slidably mounted on the slider 231; the first support unit 220 further includes a locking component 240, a height adjustment component 250, and a transmission component 260; the locking component 240 has a locked state and an unlocked state; when the locking component 240 is in the unlocked state, the mounting bracket 225 can move away from or closer to the slider 231; when the locking component 240 is in the locked state, the distance between the mounting bracket 225 and the slider 231 is locked; the height adjustment component 250 is used to adjust the height of the mounting bracket 225 when the locking component 240 is in the unlocked state; The support mechanism 200 also includes two second support units 270; the second support units 270 have the same structure as the first support unit 220; in the first direction, the second support units 270 are disposed on one side of the first support unit 220, and there is a preset distance between them; in the second direction, the two second support units 270 are respectively aligned with the two first support units 220; the transmission component 260 is used to switch the state of the corresponding locking component 240; at least one of the locking components 240 in the first support unit 220 and the second support unit 270 on the same side is in a locked state.

[0053] The slider 231 is hollow inside, defining an adjustment cavity filled with hydraulic oil. The locking assembly 240 includes a turntable 241 and a movable disc 242. The movable disc 242 is fixedly connected to the mounting bracket 225 and is slidably mounted in the adjustment cavity. A first hole 243 is provided on the movable disc 242. The turntable 241 is rotatably mounted on the movable disc 242 and has a second hole 244. When the first hole 243 is directly opposite the second hole 244, the locking assembly 240 is in the unlocked state. When the first hole 243 and the second hole 244 are misaligned, the locking assembly 240 is in the locked state. In the initial state, the first hole 243 and the second hole 244 in the first support unit 220 are connected. There is a preset angle between the first hole 243 and the second hole 244 in the second support unit 270.

[0054] The height adjustment assembly 250 includes a shaft bracket 251, a first adjusting spring 252, and a second adjusting spring 253. The shaft bracket 251 is slidably connected to the crossbeam 210. The two ends of the first adjusting spring 252 abut against the shaft bracket 251 and the crossbeam 210 respectively, causing the shaft bracket 251 to tend to move away from the crossbeam 210. The roller 222 is synchronously rotatably connected to a rotating shaft 254. The rotating shaft 254 is rotatably mounted on the mounting frame 225 and is rotatably and vertically mounted on the support plate. The two ends of the rotating shaft 254 are rotatably connected to the shaft bracket 251. The second adjusting spring 253 is disposed between the mounting frame 225 and the slider 231, with its two ends abutting against the mounting frame 225 and the slider 231 respectively, causing the mounting frame 225 to tend to move away from the slider 231.

[0055] Transmission assembly 260 includes a driving wheel 261, a driven wheel 262, a worm 263, and a worm gear 264; the driving wheel 261 is synchronously rotatably connected to the roller 222; the driven wheel 262 is rotatably mounted on the mounting bracket 225 and meshes with the driving wheel 261; the worm 263 is synchronously rotatably connected to the driven wheel 262, and the worm gear 264 is synchronously rotatably connected to the turntable 241 and meshes with the worm 263; a synchronous pulley 265 is synchronously rotatably connected to the rotating shaft 254; in the second direction... Upward, two synchronous pulleys 265 on the same side are connected by a synchronous belt 266. The synchronous belt 266 is connected to a tensioning structure, which includes a tensioning frame, a tensioning spring, and a tensioning pulley. The tensioning frame is movably mounted on the crossbeam 210, and the tensioning pulley is rotatably mounted on the tensioning frame. The two ends of the tensioning spring abut against the tensioning frame and the crossbeam 210, respectively. The synchronous belt 266 is wound around the tensioning pulley, and the tensioning spring causes the tensioning pulley to tend to move away from the synchronous pulley 265, so that the synchronous belt 266 remains taut.

[0056] By setting up a height adjustment component 250, in conjunction with a locking component 240 and a transmission component 260, when the crossbeam 210 or support rod 211 settles, or when the lower surface of the guide rail 100 is dented or bulged due to impact, the friction between the guide rail 100 and the roller 222 is used to adjust the state of the locking component 240, so that at least one of the locking components 240 in the first support unit 220 and the second support unit 270 is in a locked state. When the locking component 240 is in an unlocked state, the height of the roller 222 is adjusted to be parallel to the guide rail 100 under the downward pressure of the guide rail 100, its own weight, and the elastic force of the first adjusting spring 252 and the second adjusting spring 253. The lower surface is in contact with the guide rail 100. Simultaneously, another locking component 240 is locked, and the height of its corresponding roller 222 cannot be adjusted, providing support for the guide rail 100. The friction between the roller 222 and the guide rail 100 serves as the power source. As the guide rail 100 moves, the locking component 240, originally in a locked state, switches to an unlocked state, and its height can change. Under the action of the height adjustment component 250, it is adjusted to the height of contact with the guide rail 100. Meanwhile, the locking component 240, originally in an unlocked state, switches to a locked state, and the corresponding roller 222 provides support for the guide rail 100. The friction between the roller 222 and the guide rail 100 serves as the power source. This cyclical alternation ensures seamless connection and smooth transition of the support points when the inner mold 300 moves on the partially deformed guide rail 100, thereby solving the problems of sinking, bumping, jamming, and even derailment caused by the lack of support for the inner mold 300.

[0057] In a further embodiment, the rotating shafts 254 in the two first support units 220 of a support mechanism 200 are coaxial and fixedly connected; a second support unit 270 is located on one side of the first support unit 220 in a first direction, and another second support unit 270 is located on the other side of the first support unit 220 in the first direction.

[0058] By setting the rollers 222 of the two first support units 220 in the support mechanism 200 to be aligned in pairs and rotate synchronously, and by staggering the two second support units 270 in the first direction, the rigidity and stability of the roller 222 bracket are enhanced, ensuring that the inner mold 300 remains smooth and free from jamming during movement and support, thereby ensuring the structural safety and operational reliability of the long inner mold 300 system.

[0059] In a further embodiment, the outer mold 400 includes an outer bottom mold 410, two outer corner modules 420, two outer side molds 430, and two end molds; the axis of the outer bottom mold 410 extends along a first direction; the two outer corner modules 420 are detachably and fixedly connected to both sides of the outer bottom mold 410 in a second direction; the two outer side molds 430 are detachably and fixedly connected to the two outer corner modules 420; and the two end molds are detachably and fixedly connected to both sides of the outer bottom mold 410 in the first direction.

[0060] The inner mold 300 includes a base 310, an inner top mold 320, two inner corner modules 330, and two inner side molds 340; the axis of the base 310 extends along a first direction; the inner top mold 320 is movably connected to the base 310, and the two inner side molds 340 are rotatably connected to both sides of the inner top mold 320 in a second direction; the two inner corner modules 330 are detachably rotatably connected to both sides of the second direction; a hydraulic system 350 is installed on the base 310, and the hydraulic system 350 is used to drive the inner top mold 320 to move up and down and the inner side molds 340 and inner corner modules 330 to rotate.

[0061] This invention, by setting up replaceable outer corner modules 420 and inner corner modules 330, allows for replacement during processing according to production needs, thereby adapting to the production of different models of box girders 500. This solves the problem of traditional casting formwork having limited adaptability and being unable to quickly switch between different beam types, improving the utilization rate of formwork and construction efficiency, and reducing equipment costs.

[0062] Work process:

[0063] When pouring the box girder 500, clean the surface of the girder casting platform, fix the outer bottom formwork 410 on the girder casting platform, select and install the corresponding replaceable outer corner modules 420, and fix the two outer corner modules 420 to both sides of the outer bottom formwork 410 respectively; install the outer outer formwork 430 on both sides of the outer bottom formwork 410; apply a release agent to the inside of the outer formwork 400; fix the uprights with the release agent applied to the outer formwork 400; hoist the steel reinforcement cage onto the outer bottom formwork 410 using a tower crane, with the ends of the steel reinforcement cage flush with the outer formwork 400; the upper ends of the uprights extend beyond the steel reinforcement cage, and the crossbeam 2... 10 is fixedly connected to the upright; at this time, the roller 222 is directly opposite the two guide rails 100; the corresponding inner corner module 330 is connected to the inner mold 340 and the hydraulic system 350; and a release agent is applied to the outside of the inner mold 300; the inner top mold 320, inner mold 340 and inner corner module 330 are contracted by the hydraulic system 350 to reduce the volume of the inner mold 300, and the inner mold 300 is pulled along the first direction by the winch, the two guide rails 100 contact the multiple support mechanisms 200 in sequence, and the guide rails 100 slide on the roller 222 until the end of the inner mold 300 is flush with the end of the outer mold 400. The hydraulic system 350 is started to cause the inner top mold 320 to be raised upward. After reaching the preset height, the inner mold 340 and inner corner module 330 rotate in sequence until they are fully opened. When the inner mold 300 is fully opened, the lower edge of the inner corner module 330 is lower than the height of the crossbeam 210. Then, support rods are installed in the inner mold 300, and the end molds are fixed to both ends of the outer mold 400 in the first direction.

[0064] Concrete is then poured in layers. Throughout the pouring process, the support mechanism 200 provides stable support for the inner mold 300.

[0065] After the concrete of the box girder 500 reaches the required strength, the support rods are retracted, and the inner corner module 330, inner side mold 340 and inner top mold 320 are retracted in sequence using the hydraulic system 350. At this time, the inner corner module 330, inner side mold 340 and inner top mold 320 are separated from the box girder 500. The inner mold 300 is dragged along the first direction by a winch. During the movement of the inner mold 300, the guide rail 100 slides on the roller 222 until the inner mold 300 is completely removed. After that, the crossbeam 210 and the structure located on the crossbeam 210 are removed, and the box girder 500 is lifted out of the outer mold 400 using a tower crane. The holes through which the uprights pass are used for drainage and ventilation.

[0066] During the entry and exit process, the inner mold 300 moves axially under the action of the winch. The guide rail 100 contacts multiple support mechanisms 200 sequentially. In a single support mechanism 200, the guide rail 100 first contacts the roller 222 of a second support unit 270. When the guide rail 100 slides relative to the roller 222, the guide rail 100 is located in the small-diameter section at the axial center of the roller 222. The lower surface of the guide rail 100 is in frictional transmission with the roller 222, and the two lateral surfaces of the guide rail 100 abut against the balls 224. As the guide rail 100 moves, the friction between the guide rail 100 and the roller 222 causes the roller 222 to rotate. When the roller 222 rotates, it drives the driving wheel 261 to rotate. The driving wheel 261 drives the driven wheel 262 to rotate. When the driven wheel 262 rotates, it drives the worm 263 to rotate, which in turn drives the worm wheel 264 to rotate. When the worm wheel 264 rotates, it drives the turntable 241 to rotate, thereby adjusting the first hole 243. The area connected to the second hole 244; at the same time, when the roller 222 rotates, the rotating shaft 254 in the first support unit 220 on the same side is driven to rotate synchronously through the rotating shaft 254, the synchronous wheel 265 and the synchronous belt 266, thereby causing the roller 222 in the first support unit 220 on the same side to rotate. The rotating shaft 254 in the first support unit 220 drives the roller 222 on the other side to rotate synchronously with the roller 222 in the first support unit 220 on that side. Under the action of the synchronous wheel 265 and the synchronous belt 266 on the other side, the roller 222 in the second support unit 270 on the other side rotates synchronously. In the two first support units 220 and the second support unit 270 on the other side, when the roller 222 rotates, it drives the turntable 241 to rotate in sequence through the driving wheel 261, the driven wheel 262, the worm 263 and the worm wheel 264.

[0067] In the initial state, the first hole 243 and the second hole 244 in the first support unit 220 are connected; there is a preset angle between the first hole 243 and the second hole 244 in the second support unit 270. At this time, the height of the rollers 222 in the two second support units 270 cannot change. The moving disk 242 in the first support unit 220 moves vertically under the downward pressure of the guide rail 100, its own weight, and the elastic force of the first adjusting spring 252 and the second adjusting spring 253. During the movement, hydraulic oil passes through the first hole 243 and the second hole 244 until the rollers 222 are adjusted to abut against the lower surface of the guide rail 100. As the turntable 241 rotates, the first hole 243 and the second hole 244 in the first support unit 220 and the second support unit 270 are all in a misaligned state. At this time, the moving disk 242 has a tendency to move when the force is uneven in the vertical direction, but at this time the first hole 243 and the second hole 244 are in a misaligned state, the moving disk 242 cannot move, and the height of all rollers 222 cannot be changed, while providing support for the guide rail 100.

[0068] As the turntable 241 continues to rotate, the first hole 243 and the second hole 244 in the second support unit 270 are connected, while the first hole 243 and the second hole 244 in the first support unit 220 remain misaligned. The roller 222 in the first support unit 220 cannot move up or down, thus providing stable support for the guide rail 100. Meanwhile, the movable disk 242 in the second support unit 270 moves up and down according to the actual working conditions until the corresponding roller 222 abuts against the guide rail 100. This process is repeated, with the rollers 222 in the first support unit 220 and the second support unit 270 alternatingly adjusting their height. This solves the problem of the crossbeam 210 settling and failing to provide reliable support for the guide rail 100, thereby preventing the inner mold 300 from vertically bumping, jamming, or derailing during movement.

[0069] When the side surface of the guide rail 100 bends and deforms, the distance between the two push rods 223 changes as the deformed guide rail 100 passes the push rods 223. Under the action of the second spring 233, the two support plates move closer to each other, and the support plates drive the push rods 223 to move closer to each other, thereby clamping the guide rail 100 and providing stable support force for the guide rail 100 in the first direction, preventing the inner mold 300 from shaking in the second direction. At the same time, the two first springs 232 cause the distance between the slider 231 and the two support plates to be equal, so that the midpoint of the roller 222 in the second direction and the midpoint of the guide rail 100 in the second direction are located on the same vertical plane. This ensures that the small diameter section of the roller 222 in the axial middle is always aligned with the guide rail 100, thereby avoiding friction between the side of the guide rail 100 and the roller 222, and avoiding the problem of uneven force on the roller 222 affecting its service life. This effectively avoids jamming and wear when the inner mold 300 moves, ensuring operational reliability and smoothness.

[0070] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A guiding device suitable for different box girder inner molds, characterized in that, include: The guide rail extends along the first direction and is fixedly connected to the bottom of the inner mold. There are two guide rails, which are spaced apart along the second direction. Multiple support mechanisms are provided, and the multiple support mechanisms are spaced apart along a first direction. The support mechanisms are detachably connected to the outer mold. The support mechanism includes a crossbeam and two first support units. The crossbeam extends along a second direction, which is perpendicular to the first direction; two first support units are spaced apart on the crossbeam along the second direction, each corresponding to one of the two guide rails. The first support unit includes a support frame, rollers, push rods, and balls. The support frame is connected to a crossbeam. The rollers are rotatably mounted on the support frame, with their rotation axis extending along a second direction. The middle part of the roller's axial direction has a small diameter segment with a diameter smaller than its end diameter, and the length of this small diameter segment in the second direction is greater than the width of the guide rail in the second direction. Two push rods are provided, coaxially arranged with their axes extending along the second direction. The ends of the two push rods that are far apart from each other are fixedly connected to the support frame. The balls are rotatably mounted on the ends of the two push rods that are close to each other. The distance between the two balls is equal to the width of the guide rail in the second direction. The first support unit also includes a mounting frame and an alignment assembly; the mounting frame is slidably mounted on the crossbeam along the second direction; and rollers are rotatably mounted on the mounting frame. A support frame is movably connected to a crossbeam along a second direction; an alignment component is used to keep the support frame and the mounting frame aligned in the second direction; the alignment component includes a slider, a first spring, and a second spring; the support frame includes two support plates; the two support plates are spaced apart along the second direction and slidably mounted on the crossbeam along the second direction, and two push rods are respectively fixedly connected to the sides of the two support plates that are close to each other; the slider is slidably mounted on the crossbeam along the second direction, the slider is located between the two support plates, and the mounting frame is connected to the slider; two first springs and two second springs are provided, and both the first spring and the second spring extend along the second direction; the two ends of the first spring are respectively fixedly connected to the slider and the support plate; the two ends of the second spring are respectively fixedly connected to the crossbeam and the support plate; the second spring has a tendency to bring the support plate closer to the slider; the first spring has a tendency to make the slider move away from the support plate.

2. The guiding device for different box girder inner molds according to claim 1, characterized in that, The mounting bracket is slidably mounted on the slider. The first support unit also includes a locking component, a height adjustment component, and a transmission component. The locking component has a locked state and an unlocked state. When the locking component is in the unlocked state, the mounting bracket can move away from or closer to the slider. When the locking component is in the locked state, the distance between the mounting bracket and the slider is locked. The height adjustment component is used to adjust the height of the mounting bracket when the locking component is in the unlocked state. The support mechanism also includes two second support units. The second support units have the same structure as the first support unit. In the first direction, the second support units are located on one side of the first support units, and there is a preset distance between them. In the second direction, the two second support units are respectively aligned with the two first support units. The transmission component is used to switch the state of the corresponding locking component. At least one of the locking components in the first support unit and the second support unit on the same side is in the locked state.

3. A guiding device suitable for different box girder inner molds according to claim 2, characterized in that, The slider is hollow, defining an adjustment cavity filled with hydraulic oil. The locking assembly includes a turntable and a movable disc. The movable disc is fixedly connected to the mounting bracket and slides up and down in the adjustment cavity. A first hole is formed on the movable disc. The turntable is rotatably mounted on the movable disc and has a second hole. When the first hole is aligned with the second hole, the locking assembly is in the unlocked state. When the first hole and the second hole are misaligned, the locking assembly is in the locked state. In the initial state, the first hole and the second hole in the first support unit are connected. There is a preset angle between the first hole and the second hole in the second support unit.

4. A guiding device suitable for different box girder inner molds according to claim 3, characterized in that, The height adjustment assembly includes a shaft bracket, a first adjusting spring, and a second adjusting spring. The shaft bracket is slidably connected to the crossbeam, and the two ends of the first adjusting spring abut against the shaft bracket and the crossbeam respectively, causing the shaft bracket to tend to move away from the crossbeam. A roller is synchronously connected to a rotating shaft, which is rotatably mounted on a mounting frame and is rotatably and vertically mounted on a support plate. The two ends of the rotating shaft are rotatably connected to the shaft bracket. The second adjusting spring is disposed between the mounting frame and the slider, with its two ends abutting against the mounting frame and the slider respectively, causing the mounting frame to tend to move away from the slider.

5. A guiding device suitable for different box girder inner molds according to claim 4, characterized in that, The transmission assembly includes a driving wheel, a driven wheel, a worm, and a worm gear; the driving wheel is synchronously connected to the roller; the driven wheel is rotatably mounted on the mounting bracket and meshes with the driving wheel; the worm is synchronously connected to the driven wheel, and the worm gear is synchronously connected to the turntable and meshes with the worm; a synchronous pulley is synchronously connected to the rotating shaft; in the second direction, two synchronous pulleys on the same side are connected by a synchronous belt drive, and the synchronous belt is connected to a tensioning structure, which is used to keep the synchronous belt taut.

6. A guiding device suitable for different box girder inner molds according to claim 3, characterized in that, The rotating shafts of the two first support units in a support mechanism are coaxial and fixedly connected; one second support unit is located on one side of the first support unit in the first direction, and the other second support unit is located on the other side of the first support unit in the first direction.

7. A guiding device suitable for different box girder inner molds according to claim 1, characterized in that, The outer mold includes an outer bottom mold, two outer corner modules, two outer side molds, and two end molds; the axis of the outer bottom mold extends along a first direction; the two outer corner modules are detachably and fixedly connected to both sides of the outer bottom mold in a second direction; the two outer side molds are detachably and fixedly connected to the two outer corner modules; the two end molds are detachably and fixedly connected to both sides of the outer bottom mold in the first direction. The inner mold includes a base, an inner top mold, two inner corner modules, and two inner side molds; the axis of the base extends along a first direction; the inner top mold is movably connected to the base, and the two inner side molds are rotatably connected to both sides of the inner top mold in a second direction; the two inner corner modules are detachably rotatably connected to both sides of the second direction; a hydraulic system is installed on the base, which is used to drive the inner top mold to move up and down and the inner side molds and inner corner modules to rotate.

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