Digital production line for precast concrete box girders

Abstract

This application relates to a digital production line for precast concrete box girders, belonging to the field of precast box girders. It includes a mold closing area, a pouring area, a curing area, a stacking area, a main track and a secondary track. The main track passes through the mold closing area, the pouring area, the curing area and the stacking area, and the secondary track passes through the mold closing area and the pouring area. A first moving platform is arranged on the main track, and a first driving component for driving the first moving platform to move along the main guide rail is arranged on the first moving platform. Two side molds are rotatably connected to the first moving platform, and two mold closing components for flipping the side molds are arranged in the first platform. This application has the effect of improving the production efficiency of box girder manufacturing.

Description

Technical Field

[0001] The present application relates to the technical field of precast box girders, and particularly to a digital production line for precast concrete box girders. Background Art

[0002] The cross-sectional shape of a box girder is the same as that of a usual box section, so it is called a box girder. Generally, it consists of a cover plate, web plates, a bottom plate, and partition plates. Its materials are steel and prestressed reinforced concrete. It is mainly used for long-span or load-bearing structures.

[0003] In the traditional production process of precast box girders, first, manual steel bar binding is carried out on a jig, then corrugated pipes and anchor plates are installed, then the internal formwork and end formwork are installed, and then concrete is poured. After the concrete reaches 90% of the designed strength, steel strand threading and steel strand prestress tensioning are carried out, and then concrete curing is carried out to complete the production of precast box girders.

[0004] In view of the above related technologies, the production of box girders adopts a decentralized production method, and each process runs independently. The transfer volume between processes is large, wasting time and labor. A large amount of labor is spent, but the production efficiency is very low. Summary of the Invention

[0005] In order to improve the production efficiency of box girder production, the present application provides a digital production line for precast concrete box girders.

[0006] A digital production line for precast concrete box girders provided by the present application adopts the following technical solutions:

[0007] A digital production line for precast concrete box girders includes a mold closing area, a pouring area, a curing area, a main track, and a secondary track. The main track and the secondary track both pass through the mold closing area, the pouring area, the curing area, and the stacking area. A first moving platform is arranged on the main track, and a first driving component for driving the first moving platform to move along the main track is arranged on the first moving platform. Two side molds are rotatably connected to the first moving platform, and two mold closing components for flipping the side molds are arranged inside the first platform;

[0008] Two second moving platforms are arranged on the main track, the first moving platform is located between the two second moving platforms, a second driving component for driving the second moving platform to move along the main track is arranged on the second moving platform, an end mold is arranged on the second moving platform, and a plurality of transmission components for transmitting steel strands and a plurality of clamping components for clamping the steel strands for prestress tensioning are arranged inside the end mold;

[0009] A third moving platform is arranged on the secondary track, a third driving component for driving the third moving platform to move is arranged on the third moving platform, and an internal mold is arranged on the third moving platform.

[0010] By adopting the above technical solution, the tied steel cage is hoisted onto the first mobile platform, and then the first mobile platform drives the steel bars to be transported to the casting area. At this time, the mold closing assembly carries the two side molds for mold closing, and then the two second mobile platforms are started to approach the first mobile platform, and the second mobile platform drives the end mold to close the mold, and then the third mobile platform is started, and the third mobile platform drives the inner mold to be inserted into the steel cage.

[0011] When the formwork is installed, the transmission component passes the steel strand through the corrugated pipe of the steel cage, and then the concrete is poured. During the concrete pouring process, the transmission component drives the steel strand to move in the corrugated pipe to reduce blockage of the corrugated pipe.

[0012] When the concrete pouring is completed, the conveying assembly inserts the anchors into the two ends of the corrugated pipe, and then the conveying assembly transports the anchor clips into the anchors to anchor the steel strands. When the concrete strength reaches the design value, the third mobile platform moves away from the first mobile platform to complete the removal of the inner mold, and the mold closing assembly resets the side mold to complete the removal of the side mold. Then the clamping assembly is started to clamp the steel strands, and the mold removal hydraulic cylinder is started to push the end mold away from the prefabricated box girder for demolding. During the process of removing the end mold, the clamping assembly clamps the steel strands, thereby realizing the simultaneous removal of the end mold and prestressing of the steel strands. After the demolding is completed, the corrugated pipe is grouted, and then the first mobile platform transports the prefabricated box girder to the maintenance area for maintenance.

[0013] As the first mobile platform simultaneously closes and removes the side formwork during the transportation of the box girder to various construction areas, and simultaneously tensions the steel strands during the removal of the end formwork, the transportation time is saved, and the construction steps of removing the end formwork and prestressing the steel strands can be carried out simultaneously, thereby improving the production efficiency of the box girder and saving a lot of manpower.

[0014] Optionally, the mold closing assembly includes two first rotating shafts, two first bevel gears, two upper racks and two lower racks, the first movable platform is provided with two bar grooves, the two first rotating shafts are respectively fixed to the two side molds, the first bevel gear passes through the first rotating shaft and is fixed to the first rotating shaft, a second rotating shaft is passed through the first movable platform, second bevel gears are provided at both ends of the second rotating shaft, the second bevel gear and the first bevel gear are meshed with each other, first gears are sleeved at both ends of the second rotating shaft, the first gear is fixed to the second rotating shaft, the main track is provided with two upper racks and two lower racks, the upper racks and the lower racks correspond to the bar grooves, the upper racks and the lower racks are distributed along the length direction of the track, the lower rack is close to the maintenance area relative to the upper rack, and two support assemblies for supporting the side molds are provided on the first movable platform.

[0015] By adopting the above technical solution, when the first mobile platform moves to the pouring area, the upper rack first passes through the strip groove and meshes with the first gear. The first gear drives the second rotating shaft to rotate, the second rotating shaft drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, the first bevel gear drives the first rotating shaft to rotate, and the first rotation drives the side mold to turn over, thus completing the mold closing of the side mold. After the mold closing is completed, the first mobile platform disengages from the upper gear, and the support assembly supports the side mold, and then concrete is poured. When the concrete pouring is completed and meets the requirements for mold removal, the first mobile platform continues to move and inserts the lower rack into the strip groove. As the first mobile platform moves, the lower rack drives the first gear to reverse, the first gear drives the second rotating shaft to reverse, the second rotating shaft drives the second bevel gear to reverse, the second bevel gear drives the first bevel gear to reverse, the first bevel gear drives the first rotating shaft to reverse, and the first rotation drives the side mold to turn over, thus completing the removal of the side mold. Therefore, the mold removal and mold closing are simultaneously realized during the transportation of the precast box girder, saving the transfer time and improving the construction efficiency.

[0016] Optionally, the support assembly includes a support plate and a first support rod. The support plate is arranged on the first mobile platform. The first support rod is hinged to the support plate. A plurality of support hydraulic cylinders are hinged to the support plate. The piston rod of the support hydraulic cylinder is provided with a second support rod. The second support rod is hinged to the first support rod. A support seat is arranged at the end of the second support rod far away from the support plate.

[0017] By adopting the above technical solution, when the first mobile platform passes through the upper rack, the piston rod of the support hydraulic cylinder gradually extends, and the support hydraulic cylinder drives the first support rod to rotate. When the mold closing is completed, the first support rod drives the support seat to abut against the side mold. When the first mobile platform passes through the lower rack after the concrete pouring is completed, the support hydraulic cylinder gradually resets and drives the support seat to move away from the side mold. The first support rod supports the side mold during the concrete pouring to prevent the side mold from turning downwards.

[0018] Optionally, the first driving assembly includes a hydraulic motor, a plurality of first rotating shafts and a plurality of first rollers. The hydraulic motor is arranged inside the first mobile platform. One of the first rotating shafts is fixed to the driving shaft of the hydraulic motor. The first rotating shaft fixed to the hydraulic motor is rotationally connected to the first mobile platform. Both ends of the first rotating shaft fixed to the hydraulic motor are fixed to a first roller. The remaining first rotating shafts are all fixed inside the mobile platform and their two ends are respectively rotationally connected to the first rollers.

[0019] By adopting the above technical solution, the hydraulic motor drives one of the first rotating shafts to rotate. The first rotating shaft fixed to the hydraulic motor drives the first roller fixed to it to rotate, thereby driving the other first rollers to rotate, and further realizing the movement of the first mobile platform along the main track.

[0020] Optionally, a plurality of strand passing channels are provided in the end die, and the plurality of strand passing channels correspond to the corrugated pipes embedded in the precast box girder one by one. Two corresponding first long holes are provided on the inner wall of the strand passing channels, and the conveying components correspond to the first long holes one by one. A plurality of annular grooves are provided in the end film. The conveying component includes a driving motor, a second gear and a transmission rack. The driving motor is arranged in the annular groove. A first slider is arranged on the driving motor. The first slider is slidably connected with the transmission rack. The second gear is fixed on the motor shaft of the driving motor. The transmission rack is arranged in the annular groove. The transmission rack meshes with the second gear. A second slider is arranged on the motor shaft of the driving motor. A first hydraulic cylinder is fixed on the second slider. A push block is arranged on the piston rod of the first hydraulic cylinder. The push block extends out from the first long hole.

[0021] By adopting the above technical solution, the steel strand is inserted into one end die strand passing channel, passes through the corrugated pipe and then passes out from the strand passing channel of the other end die. Then, the first hydraulic cylinder is started, and the first hydraulic cylinder drives the push block to clamp the steel strand.

[0022] During the process of pouring concrete, the driving motor is started. The driving motor drives the second gear to rotate. The second gear moves on the transmission rack, thereby driving the driving motor to move along the length direction of the transmission rack. The driving motor drives the second slider to move, and the second slider drives the first hydraulic cylinder to move, thereby realizing the movement of the push block. By controlling the forward and reverse rotation of the driving motor, the steel strand moves in the corrugated pipe during the pouring of concrete, thereby reducing the occurrence of blockage of the corrugated pipe.

[0023] After the concrete pouring is completed, the anchor and the anchor clip are sequentially inserted into the strand passing channel, and the push block pushes the anchor and the anchor clip to be fixed in the anchor gasket at the end of the corrugated pipe, thereby realizing the fixation of the steel strand and facilitating the later prestress tensioning of the steel strand.

[0024] Optionally, two corresponding second long holes are provided on the inner wall of the strand passing channel, and the second long holes correspond to the clamping components one by one. The clamping component includes a second hydraulic cylinder. A clamping plate is fixed on the piston rod of the second hydraulic cylinder. The clamping plate extends out from the second long hole.

[0025] By adopting the above technical solution, after the concrete pouring is completed, the second hydraulic cylinder is started. The piston rod of the second hydraulic cylinder drives the clamping plate to clamp the steel strand. Then, the form removal hydraulic cylinder is started to move the end die away from the box girder. During the process of the end die moving away, the steel strand is tensioned, thereby realizing the prestress tensioning of the steel strand. When the tensioning reaches the designed required length, the second hydraulic cylinder drives the clamping block to reset and separates the end die from the steel strand, thereby realizing the prestress tensioning of the steel strand while removing the end die and improving the production efficiency of the box girder.

[0026] Optionally, a grouting channel for facilitating grouting of the precast box girder anchor is provided on the end mold, and the grouting channel is communicated with the grouting hole of the precast box girder anchor plate.

[0027] By adopting the above technical solution, the grouting pipe is passed through the grouting channel, and then the grouting pipe is fixed on the grouting hole of the anchor plate, so as to facilitate grouting of the precast box girder.

[0028] Optionally, a plurality of formwork removal hydraulic cylinders are arranged on one side of the two end molds facing each other.

[0029] By adopting the above technical solution, after the precast box girder reaches the formwork removal time, the formwork removal hydraulic cylinder starts to push against the precast box girder, so as to cooperate with the second driving assembly for end formwork removal and prestress tensioning, and reduce the situation that the second driving assembly lacks sufficient driving force and cannot perform formwork removal and prestress tensioning simultaneously.

[0030] Optionally, the second driving assembly includes a first motor, a plurality of second rotating shafts and a plurality of second rollers. The first motor is arranged in the second moving platform. One of the second rotating shafts is fixed to the first motor. The second rotating shaft fixed to the first motor is rotatably connected to the second moving platform. Both ends of the second rotating shaft fixed to the first motor are fixed to a second roller. The remaining second rotating shafts are all fixed in the moving platform and their two ends are respectively rotatably connected to the second rollers. The third driving assembly includes a second motor, a plurality of third rotating shafts and a plurality of third rollers. The third driving assembly has the same structure as the second driving assembly.

[0031] By adopting the above technical solution, the first motor drives one of the second rotating shafts to rotate. The second rotating shaft fixed to the first motor drives the second roller fixed to it to rotate, so as to drive other second rollers to rotate, and further realize the movement of the second moving platform along the main track.

[0032] The second motor drives one of the third rotating shafts to rotate. The third rotating shaft fixed to the second motor drives the third roller fixed to it to rotate, so as to drive other third rollers to rotate, and further realize the movement of the third moving platform along the secondary track.

[0033] Optionally, a curing shed is arranged in the curing area. A temperature sensor and a humidity sensor are arranged in the curing shed. An air conditioner and a plurality of spray pipes are arranged in the curing shed.

[0034] By adopting the above technical solution, after the formwork of the box girder is removed, the box girder is transported into the curing shed for curing. The temperature sensor automatically adjusts the temperature of the air conditioner according to the temperature of the curing shed, and the humidity sensor automatically adjusts the water spraying amount of the spray pipe according to the humidity of the curing shed, so as to provide standard curing conditions for the box girder.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. The mold clamping assembly enables the side mold to achieve the effects of automatic mold removal and mold clamping as the first moving platform moves, thereby enabling the transfer of precast box girders and mold removal and mold clamping to be carried out simultaneously, saving transfer time and improving construction efficiency;

[0037] 2. During the process of removing the end mold, the clamping assembly clamps the steel strand, achieving the effects of simultaneous mold removal and prestress tensioning, and carrying out two successive construction steps simultaneously, improving the production efficiency of the box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0039] Figure 2 is a schematic diagram of the structure of the support assembly for an embodiment of the present application.

[0040] Figure 3 is Figure 2 an enlarged schematic diagram of part A in

[0041] Figure 4 is a schematic diagram of the structure of the mold removal hydraulic cylinder for an embodiment of the present application.

[0042] Figure 5 is a schematic diagram of the structure of the first drive assembly, the second drive assembly, and the third drive assembly for an embodiment of the present application.

[0043] Figure 6 is Figure 5 an enlarged schematic diagram of part B in

[0044] Figure 7 is Figure 5 an enlarged schematic diagram of part C in

[0045] Figure 8 is Figure 5 an enlarged schematic diagram of part D in

[0046] Figure 9 is a schematic diagram of the structure of the interior of the end mold for an embodiment of the present application.

[0047] Figure 10 is Figure 9 an enlarged schematic diagram of part E in

[0048] Figure 11 is a schematic diagram of the structure of the curing shed for an embodiment of the present application.

[0049] Explanation of reference numerals: 12, casting area; 13, curing area; 131, curing shed; 132, air conditioner; 133, humidity sensor; 134, temperature sensor; 135, spray pipe; 136, inlet; 137, outlet; 14, stacking area; 2, main track; 21, auxiliary track; 3, first mobile platform; 31, first drive assembly; 311, hydraulic motor; 312, first rotating shaft; 313, first roller; 32, side mold; 33, mold clamping assembly; 331, first rotating shaft; 332, first bevel gear; 333, second rotating shaft; 334, second bevel gear; 335, first gear; 336, upper rack; 337, lower rack; 338, strip groove; 34, support assembly; 341, support plate; 342, first support rod; 343, support hydraulic cylinder; 344 , the second support rod; 345, the support support; 4, the second mobile platform; 41, the second drive assembly; 411, the first motor; 412, the second rotating shaft; 413, the second roller; 42, the end mold; 43, the demoulding hydraulic cylinder; 44, the transmission assembly; 441, the drive motor; 442, the second gear; 443, the transmission rack; 444, the second slider; 445, the first hydraulic cylinder; 446, the push block; 447, the first slider; 45, the clamping assembly; 451, the second hydraulic cylinder; 452, the clamping plate; 46, the grouting channel; 47, the beam passing channel; 471, the first long hole; 472, the second long hole; 48, the annular groove; 5, the third mobile platform; 51, the third drive assembly; 511, the second motor; 512, the third rotating shaft; 513, the third roller; 52, the inner mold. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-11 This application is described in further detail.

[0051] The embodiment of the present application discloses a digital production line for precast concrete box girders.

[0052] like Figure 1 , Figure 2 and Figure 3, the precast concrete box girder digital production line includes a pouring area 12, a curing area 13, a stacking area 14, a main track 2 and a secondary track 21. Both the main track 2 and the secondary track 21 pass through the pouring area 12, the curing area 13, and the stacking area 14. The main track 2 has two tracks, and there is a first moving platform 3 and two second moving platforms 4 on the main track 2. The first moving platform 3 is located between the two second moving platforms 4. The secondary track 21 is located between the two tracks of the main track 2, and there is a third moving platform 5 on the secondary track 21. On both sides of the first moving platform 3, there are side molds 32. Inside the first moving platform 3, there is a mold closing assembly 33 for flipping the side molds 32. On the first moving platform 3, there are two support assemblies 34 for supporting the side molds 32. On the second moving platform 4, there is an end mold 42. Inside the end mold 42, there are several conveying assemblies 44 for conveying steel strands and anchors into the corrugated pipes of the box girder. Inside the end mold 42, there are also several clamping assemblies 45 for tensioning the steel strands. On the end mold 42, there are several grouting channels 46. On the third moving platform 5, there is an inner mold 52.

[0053] As Figure 4 and Figure 5 , inside the second moving platform 4, there are several form removal hydraulic cylinders 43. On the first moving platform 3, there is a first driving assembly 31 for driving the first moving platform 3 to move along the main track 2. On the second moving platform 4, there is a second driving assembly 41 for driving the second moving platform 4 to move along the main track 2. The secondary track 21 is located between the two tracks of the main track 2, and there is a third moving platform 5 on the secondary track 21. On the third moving platform 5, there is a third driving assembly 51 for driving the third moving platform 5 to move along the secondary track 21.

[0054] During use, place the tied steel reinforcement cage on the first moving platform 3, then transport the first moving platform 3 to the pouring area 12. At the same time, the mold closing assembly 33 drives the two side molds 32 to flip for mold closing, and start the support assembly 34 to support the side molds 32. Then both second moving platforms 4 move towards the first moving platform 3, and one end of the end mold 42 is inserted between the two side molds 32, thus completing the installation of the end mold 42. Then the steel strands pass through the conveying assemblies 44 and penetrate into the corrugated pipes inside the steel reinforcement cage. Subsequently, the third moving platform 5 approaches the first moving platform 3 and inserts the inner mold 52 into the steel reinforcement cage, thereby realizing the formwork installation of the precast box girder and pouring concrete in the pouring area 12.

[0055] During the pouring process, the conveying assemblies 44 drive the steel strands to move inside the corrugated pipes, reducing the inflow and solidification of concrete inside the corrugated pipes, which may cause blockage of the corrugated pipes.

[0056] After the concrete is poured, move the first moving platform 3. The support assembly 34 cooperates with the mold closing assembly 33 to remove the formwork. Then, the anchor and the anchor clip are conveyed into the anchor backing plate of the precast box girder through the conveying assembly 44 to realize the anchoring of the steel strand. Then, reset the conveying assembly 44 and start the clamping assembly 45. The clamping assembly 45 clamps the steel strand. Then, start the formwork removal hydraulic cylinder 43. The formwork removal hydraulic cylinder 43 drives the end form 42 away from the precast box girder to realize the removal of the end form 42. During the removal of the end form 42, the clamping assembly 45 clamps the steel strand, and the end form 42 tensions the steel strand. After the tensioning is completed, pass the grouting pipe through the grouting channel 46 and connect it to the grouting hole fixed on the anchor backing plate of the precast box girder. Then, start grouting the corrugated pipe. After the grouting is completed, reset the clamping assembly 45, cut off the redundant steel strand. Finally, the third moving platform 5 drives the internal form 52 to be withdrawn from the precast box girder to complete the removal of the internal form 52.

[0057] After the formwork removal is completed, one of the second moving platforms 4 moves to the stacking area 14, and the other second moving platform 4 and the third moving platform 5 move out of the pouring area 12. The first moving platform 3 drives the precast box girder to move to the curing area 13 for curing. After the curing is completed, the first moving platform 3 moves to the stacking area 14 and hoists and transports the precast box girder for storage. The first moving platform 3 drives the precast box girder to pass through the pouring area 12, the curing area 13, and the stacking area 14 to complete the flow line construction. Compared with the traditional production of precast box girders, a large amount of box girder transfer time is saved. At the same time, the mold closing assembly 33 realizes the rapid installation and removal of the side form 32, and the third moving platform 5 realizes the rapid installation and removal of the internal form 52, replacing the way of workers installing and removing the formwork, saving construction time. And the cooperation of the second moving platform 4, the formwork removal hydraulic cylinder 43, the conveying assembly 44, and the clamping assembly 45 realizes the prestress tensioning of the steel strand while removing the end form 42, and combines two construction steps that were carried out successively before, improving the production efficiency of the box girder.

[0058] As Figure 6 , the first driving assembly 31 includes a hydraulic motor 311 and several first rotating shafts 312. The hydraulic motor 311 is arranged inside the first moving platform 3. One of the first rotating shafts 312 is fixed to the driving shaft of the hydraulic motor 311. First rollers 313 are sleeved at both ends of the first rotating shaft 312 fixed to the hydraulic motor 311. The first rollers 313 are fixed to the first rotating shaft 312. The remaining first rotating shafts 312 are all fixed inside the first moving platform 3. The several first rotating shafts 312 are parallel to each other, and first rollers 313 are rotatably connected to both ends of the remaining first rotating shafts 312. The first rollers 313 are located in the main track 2.

[0059] As Figure 7, The second driving assembly 41 includes a first motor 411 and a plurality of second rotating shafts 412. The first motor 411 is arranged in the second moving platform 4. One of the second rotating shafts 412 is fixed to the motor shaft of the first motor 411. Second rollers 413 are sleeved at both ends of the second rotating shaft 412 fixed to the first motor 411. The second rollers 413 are fixed to the second rotating shafts 412. The remaining second rotating shafts 412 are all fixed in the second moving platform 4. The plurality of second rotating shafts 412 are parallel to each other, and second rollers 413 are rotatably connected to both ends of the remaining second rotating shafts 412. The second rollers 413 are located in the main track 2.

[0060] As Figure 8 , The third driving assembly 51 includes a second motor 511 and a plurality of third rotating shafts 512. The second motor 511 is arranged in the third moving platform 5. One of the third rotating shafts 512 is fixed to the motor shaft of the second motor 511. Third rollers 513 are sleeved at both ends of the third rotating shaft 512 fixed to the second motor 511. The third rollers 513 are fixed to the third rotating shafts 512. The remaining third rotating shafts 512 are all fixed in the third moving platform 5. The plurality of third rotating shafts 512 are parallel to each other, and third rollers 513 are rotatably connected to both ends of the remaining third rotating shafts 512. The third rollers 513 are located in the sub-track 21.

[0061] During the use process, the hydraulic motor 311 drives the first rotating shaft 312 fixed to its drive shaft to rotate. The first rotating shaft 312 fixed to the hydraulic motor 311 drives the first roller 313 to start rotating, thereby driving the first rollers 313 of other first rotating shafts 312 to rotate, and further realizing the movement of the first moving platform 3. The first motor 411 drives the second rotating shaft 412 fixed to its motor shaft to rotate. The second rotating shaft 412 fixed to the first motor 411 drives the second roller 413 to start rotating, thereby driving the second rollers 413 of other second rotating shafts 412 to rotate, and further realizing the movement of the second moving platform 4. The second motor 511 drives the third rotating shaft 512 fixed to its motor shaft to rotate. The third rotating shaft 512 fixed to the second motor 511 drives the third roller 513 to start rotating, thereby driving the third rollers 513 of other third rotating shafts 512 to rotate, and further realizing the movement of the third moving platform 5.

[0062] As Figure 3, the mold clamping assembly 33 includes a second rotating shaft 333, two upper racks 336, two lower racks 337 and two first rotating shafts 331. The two upper racks 336 are respectively arranged on one side of the two tracks of the main track 2 close to each other. The two lower racks 337 are respectively arranged on one side of the two tracks of the main track 2 close to each other. The upper rack 336 and the lower rack 337 are both located in the pouring area 12 and between the main track 2 and the auxiliary track 21. The lower rack 337 is closer to the curing area 13 than the upper rack 336.

[0063] Two strip-shaped grooves 338 are formed in the first moving platform 3. The strip-shaped grooves 338 correspond to the upper racks 336 one by one, and the strip-shaped grooves 338 correspond to the lower racks 337 one by one. The second rotating shaft 333 is rotationally connected to the first moving platform 3 and both ends of the second rotating shaft 333 pass through the two strip-shaped grooves 338 respectively. First gears 335 are sleeved on both ends of the second rotating shaft 333 respectively. The first gears 335 are fixed to the second rotating shaft 333. Both the upper rack 336 and the lower rack 337 are meshed with the first gears 335. Second bevel gears 334 are also sleeved on both ends of the second rotating shaft 333. The second bevel gears 334 are fixed to the second rotating shaft 333. The two first rotating shafts 331 are respectively fixed in the two side molds 32. First bevel gears 332 are sleeved on both of the two first rotating shafts 331. The first bevel gears 332 are fixed to the first rotating shafts 331. The first bevel gears 332 and the second bevel gears 334 are meshed with each other.

[0064] During the use process, when the first moving platform 3 moves along the main track 2 towards the stacking area 14, the upper rack 336 first passes through the strip-shaped groove 338 and meshes with the first gear 335. As the first moving platform 3 moves, the first gear 335 drives the second rotating shaft 333 to rotate. The second rotating shaft 333 drives the second bevel gear 334 to rotate. The second bevel gear 334 drives the first bevel gear 332 to rotate. The first bevel gear 332 drives the first rotating shaft 331 to rotate. The first rotating shaft 331 drives the side mold 32 to turn over, so that the two side molds 32 approach each other to close the mold. When the first moving platform 3 disengages from the side mold 32, the support assembly 34 supports the side mold 32 to prevent the side mold 32 from resetting, and then waits for pouring in the pouring area 12.

[0065] After the concrete pouring is completed, the first moving platform 3 continues to move towards the stacking area 14, and the lower rack 337 enters the strip groove 338. At this time, the support assembly 34 resets. As the first moving platform 3 moves, the lower rack 337 drives the first gear 335 to rotate in the reverse direction. The first gear 335 drives the second rotating shaft 333 to rotate, the second rotating shaft 333 drives the second bevel gear 334 to rotate, the second bevel gear 334 drives the first bevel gear 332 and the first rotating shaft 331 to rotate in sequence, and the first rotating shaft 331 drives the side mold 32 to flip, so that the two side molds 32 move away from each other to remove the mold. As the first moving platform 3 enters different working areas, the side mold 32 can automatically realize the operations of mold closing and mold removal, simultaneously carrying out the transfer of the precast box girder and the removal of the mold, saving the transfer time and replacing the construction methods of manual mold installation and removal, and improving the production efficiency of the precast box girder.

[0066] As Figure 2 , the two support assemblies 34 are respectively arranged on both sides of the first moving platform 3. The support assembly 34 includes a support plate 341 and a first support rod 342. The support plate 341 is fixed on the side surface of the first moving platform 3, the first support rod 342 is hinged on the support plate 341, a number of support hydraulic cylinders 343 are equidistantly arranged along the length direction of the support plate 341, and a number of support hydraulic cylinders 343 are all hinged on the support plate 341. The piston rod of the support hydraulic cylinder 343 is fixed with a second support rod 344, the second support rod 344 is hinged with the first support rod 342, and a support seat 345 is arranged at one end of the first support rod 342 far away from the support plate 341, and the support seat 345 abuts against the side mold 32.

[0067] During use, when the upper rack 336 is about to be separated from the first moving platform 3, the support hydraulic cylinder 343 is started, so that the second support rod 344 drives the first support rod 342 to rotate, and the first support rod 342 drives the support seat 345 to tightly abut against the side mold, thus preventing the side mold 32 from collapsing when the first moving platform 3 leaves the upper rack 336.

[0068] As Figure 9 and Figure 10The end mold 42 is provided with a plurality of beam-through channels 47, which correspond one-to-one to the corrugated tubes embedded in the prefabricated box beam. Two relatively distributed first long holes 471 are provided on the inner wall of the beam-through channels 47. The transmission components 44 correspond one-to-one to the first long holes 471. The end mold 42 is provided with a plurality of annular grooves 48. The transmission components 44 include a driving motor 441, a second gear 442 and a transmission rack 443. The transmission rack 443 is fixed in the annular groove 48. The driving motor 441 is arranged in the annular groove 48. The driving motor 441 is provided with a first slider 447. The first slider 448 is provided on the driving motor 441. A slider 447 is slidably connected to the transmission rack 443, the second gear 442 is sleeved on the motor shaft of the driving motor 441, the second gear 442 is fixed to the motor shaft of the driving motor 441, the second gear 442 and the transmission rack 443 are meshed with each other, the motor shaft of the driving motor 441 is rotatably connected to the second slider 444, the first hydraulic cylinder 445 is fixed to the second slider 444, and a push block 446 is fixed to the piston rod of the first hydraulic cylinder 445, the push block 446 is L-shaped, and the push block 446 corresponds to the first elongated hole 471 and extends out from the first elongated hole 471.

[0069] The steel strand is passed through the bundle passage 47, and then the first hydraulic cylinder 445 is started. The first hydraulic cylinder 445 drives the push block 446 to extend from the first long hole 471. Two push blocks 446 extend from each bundle passage 47 to clamp the steel strand. Then the drive motor 441 is started. The drive motor 441 drives the second gear 442 to rotate. At the same time, the drive motor 441 and the first slider 447 move along the length direction of the first long hole 471. The drive motor 441 drives the second slider 444 to move. The second slider 444 drives the first hydraulic cylinder 445 to move. The first hydraulic cylinder 445 drives the push block 446 moves, and the push block 446 drives the steel strand to pass through the corrugated tube. When the second slider 444 approaches the corrugated tube, the first hydraulic cylinder 445 is reset and the drive motor 441 is reset, thereby driving the second slider 444 to reset, and then repeat the above operation, continue to push the steel strand through the corrugated tube, and by repeating the above operation many times, the bundle of the steel strands is realized. At the same time, during the pouring of concrete, the push block 446 clamps the steel strand and moves the steel strand in the corrugated tube, thereby reducing the solidification of concrete flowing into the corrugated tube and causing the corrugated tube to be blocked, which leads to the situation that grouting cannot be smoothly performed in the later stage.

[0070] When the concrete pouring is completed, the anchor is placed in the bundle passage 47, and the push block 446 pushes the anchor to press against the anchor pad of the prefabricated box girder. Then the anchor clip is placed in the bundle passage 47 and the push block 446 pushes the anchor clip to be clamped in the anchor, thereby completing the anchoring of the steel strand, replacing the manual anchoring method, and achieving the effect of simultaneously anchoring both ends of multiple steel strands.

[0071] like Figure 9 and Figure 10, the tendon threading channel 47 may be provided with two opposite second long slots 472, and the clamping assemblies 45 correspond to the second long slots 472 one by one. The clamping assembly 45 includes a second hydraulic cylinder 451 and a clamping plate 452. The second hydraulic cylinder 451 is fixed inside the tendon threading channel 47, the clamping plate 452 is fixed on the piston rod of the second hydraulic cylinder 451, the clamping plate 452 corresponds to the second long slot 472 and extends out from the second long slot 472, and the surface of the clamping plate 452 facing away from the second long slot 472 is a rough surface.

[0072] After the steel strand is anchored, the driving motor 441 and the first hydraulic cylinder 445 are reset, and then the second hydraulic cylinder 451 is started. At this time, the two clamping plates 452 inside the tendon threading channel 47 approach each other and clamp the steel strand. Then, the form removal hydraulic cylinder 43 and the first motor 411 are started. The first motor 411 drives the second roller to rotate. The form removal hydraulic cylinder 43 and the first motor 411 cooperate to move the end form 42 away from the precast box girder. While the end form 42 moves away from the precast box girder, the steel strand is tensioned, so that the two construction steps of removing the end form 42 and prestressing are carried out simultaneously, saving the time of the precast box girder and improving the production efficiency.

[0073] As Figure 11 , the curing area 13 includes a curing shed 131. A humidity sensor 133 and a temperature sensor 134 are arranged inside the curing shed 131. An air conditioner 132 is arranged inside the curing shed 131, and a plurality of spray pipes 135 are arranged on the top of the curing shed 131.

[0074] When curing the precast box girder, the first moving platform 3 drives the precast box girder to move into the curing shed 131. Then, the temperature sensor 134 adjusts the air conditioner 132 according to the temperature of the curing shed. Then, according to the humidity sensor 133, the water output of the spray pipe 135 is adjusted according to the humidity of the curing shed, so that the precast box girder is in a curing environment with standard humidity and temperature.

[0075] The implementation principle of the embodiment of the present application is as follows: The bound steel reinforcement cage is placed on the first moving platform 3, and then the first moving platform 3 is moved to the pouring area 12. During the movement, the upper rack 336 meshes with the first gear 335, the second rotating shaft 412 rotates and drives the second bevel gear 334 to rotate. The second bevel gear 334 drives the first bevel gear 332 to rotate, thereby driving the first rotating shaft 312 to rotate, so as to realize the flipping and closing of the side form 32. When the side form 32 is closed, the support hydraulic cylinder 343 drives the first support rod 342 to rotate, and the first support rod 342 drives the support base 345 to abut against the side form 32. Then, the two second moving platforms 4 respectively drive the end form 42 to approach both ends of the first moving platform 3, and the ends of the end form 42 are inserted between the two side forms 32, thus completing the installation of the side form 32. Then, the third moving platform 5 approaches the first moving platform 3, and the inner form 52 is inserted into the steel reinforcement cage, thus completing the installation of the inner form 52.

[0076] Before the concrete pouring, start the driving motor 441 and the first hydraulic cylinder 445, so that the pushing block 446 drives the steel strand to pass through the corrugated pipe, and then carry out the subsequent concrete pouring. After the concrete pouring is completed, the third moving platform 5 moves away from the first moving platform 3 to complete the removal of the inner mold 52. Then the first moving platform 3 moves towards the maintenance area 13 and makes the first gear 335 engage with the lower rack 337. As the first moving platform 3 moves, the two side molds 32 move away from each other to complete the removal of the side molds 32. Subsequently, the pushing block 446 pushes the anchor and the anchor clip to anchor the steel strand, and the clamping plate 452 clamps the steel strand. Then the second moving platform 4 moves away from the precast box girder, and the second moving platform 4 cooperates with the formwork removal hydraulic cylinder 43 and the clamping plate 452 to complete the removal of the end mold 42 and the tensioning of the prestress at the same time. After the tensioning is completed, grouting is carried out on the corrugated pipe, and then the end mold 42 is separated from the steel strand and the redundant steel strand is cut off.

[0077] After the formwork removal is completed, the first moving platform 3 drives the precast box girder into the maintenance shed 131 for maintenance and transports it to the stacking area 14 for stacking. Through the above operations, the installation and removal of the side mold 32 and the transportation of the precast box girder are carried out at the same time, saving the transportation time. And when the end mold 42 is removed, the steel strand is tensioned, and the construction steps of removing the end mold 42 and the construction steps of tensioning the prestress of the steel strand are carried out at the same time, improving the production efficiency of the precast box girder.

[0078] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A digital production line for precast concrete box girders, characterized in that: It includes a pouring area (12), a curing area (13), a main track (2) and a secondary track (21). Both the main track (2) and the secondary track (21) pass through the pouring area (12) and the curing area (13). A first moving platform (3) is arranged on the main track (2). A first driving component (31) for driving the first moving platform (3) to move along the main track (2) is arranged on the first moving platform (3). Two side molds (32) are rotatably connected to the first moving platform (3). Two mold closing components (33) for flipping the side molds (32) are arranged in the first moving platform (3); Two second moving platforms (4) are arranged on the main track (2). The first moving platform (3) is located between the two second moving platforms (4). A second driving component (41) for driving the second moving platform (4) to move along the main track (2) is arranged on the second moving platform (4). An end mold (42) is arranged on the second moving platform (4). A number of transmission components (44) for transmitting steel strands and a number of clamping components (45) for clamping the steel strands for prestress tensioning are arranged in the end mold (42); A third moving platform (5) is arranged on the secondary track (21). A third driving component (51) for driving the third moving platform (5) to move is arranged on the third moving platform (5). An inner mold (52) is arranged on the third moving platform (5); A number of strand passing channels (47) are provided in the end mold (42). The number of strand passing channels (47) corresponds one by one to the corrugated pipes embedded in the precast box girder. Two corresponding first long holes (471) are provided on the inner wall of the strand passing channel (47). The transmission components (44) correspond one by one to the first long holes (471). A number of annular grooves (48) are provided in the end mold (42). The transmission component (44) includes a driving motor (441), a second gear (442) and a transmission rack (443). The driving motor (441) is arranged in the annular groove (48). A first slider (447) is arranged on the driving motor (441). The first slider (447) is slidably connected to the transmission rack (443). The second gear (442) is fixed on the motor shaft of the driving motor (441). The transmission rack (443) is arranged in the annular groove (48). The transmission rack (443) meshes with the second gear (442). A second slider (444) is arranged on the motor shaft of the driving motor (441). A first hydraulic cylinder (445) is fixed on the second slider (444). A push block (446) is arranged on the piston rod of the first hydraulic cylinder (445). The push block (446) extends out from the first long hole (471).

2. The digital production line for precast concrete box girders according to claim 1, characterized in that: The mold clamping assembly (33) includes two first rotating shafts (331), two first bevel gears (332), two upper racks (336) and two lower racks (337). Two strip-shaped grooves (338) are formed in the first moving platform (3). The two first rotating shafts (331) are respectively fixed to the two side molds (32). The first bevel gears (332) pass through the first rotating shafts (331) and are fixed to the first rotating shafts (331). A second rotating shaft (333) is disposed through the first moving platform (3). Second bevel gears (334) are provided at both ends of the second rotating shaft (333). The second bevel gears (334) mesh with the first bevel gears (332). First gears (335) are sleeved at both ends of the second rotating shaft (333). The first gears (335) are fixed to the second rotating shaft (333). Two upper racks (336) and two lower racks (337) are provided on the main track (2). The upper racks (336) and the lower racks (337) correspond to the strip-shaped grooves (338) respectively. The upper racks (336) and the lower racks (337) are distributed along the length direction of the track. The lower racks (337) are closer to the curing area (13) than the upper racks (336). Two support assemblies (34) for supporting the side molds (32) are provided on the first moving platform (3).

3. The digital production line for precast concrete box girders according to claim 2, characterized in that: The support assembly (34) includes a support plate (341) and a first support rod (342). The support plate (341) is disposed on the first moving platform (3). The first support rod (342) is hinged to the support plate (341). A number of support hydraulic cylinders (343) are hinged to the support plate (341). A second support rod (344) is provided on the piston rod of the support hydraulic cylinder (343). The second support rod (344) is hinged to the first support rod (342). A support seat (345) is provided at the end of the second support rod (344) away from the support plate (341).

4. The digital production line for precast concrete box girders according to claim 1, characterized in that: The first driving assembly (31) includes a hydraulic motor (311), a number of first rotating shafts (312) and a number of first rollers (313). The hydraulic motor (311) is disposed in the first moving platform (3). One of the first rotating shafts (312) is fixed to the output shaft of the hydraulic motor (311). The first rotating shaft (312) fixed to the hydraulic motor (311) is rotatably connected to the first moving platform (3). First rollers (313) are fixed to both ends of the first rotating shaft (312) fixed to the hydraulic motor (311). The remaining first rotating shafts (312) are fixed in the first moving platform (3) and their two ends are respectively rotatably connected to the first rollers (313).

5. The digital production line for precast concrete box girders according to claim 1, characterized in that: Two corresponding second long holes (472) are formed in the inner wall of the tendon threading channel (47). The second long holes (472) correspond to the clamping assemblies (45) one by one. The clamping assembly (45) includes a second hydraulic cylinder (451). A clamping plate (452) is fixed to the piston rod of the second hydraulic cylinder (451). The clamping plate (452) extends out from the second long hole (472).

6. The digital production line for precast concrete box girders according to claim 1, characterized in that: A grouting channel (46) for facilitating grouting of the precast box girder is formed in the end mold (42). The grouting channel (46) is communicated with the grouting hole of the anchor plate of the precast box girder.

7. The digital production line for precast concrete box girders according to claim 1, characterized in that: A plurality of demolding hydraulic cylinders (43) are arranged on one side of the two end molds (42) facing each other.

8. The digital production line for precast concrete box girders according to claim 1, characterized in that: The second driving assembly (41) includes a first motor (411), a plurality of second rotating shafts (412) and a plurality of second rollers (413). The first motor (411) is arranged in the second moving platform (4). One of the second rotating shafts (412) is fixed to the first motor (411). The second rotating shaft (412) fixed to the first motor (411) is rotatably connected to the second moving platform (4). Both ends of the second rotating shaft (412) fixed to the first motor (411) are fixed to a second roller (413). The remaining second rotating shafts (412) are all fixed in the moving platform and their two ends are respectively rotatably connected to the second rollers (413). The third driving assembly (51) includes a second motor (511), a plurality of third rotating shafts (512) and a plurality of third rollers (513). The third driving assembly (51) has the same structure as the second driving assembly (41).

9. The digital production line for precast concrete box girders according to claim 1, characterized in that: A curing shed (131) is arranged in the curing area (13). A temperature sensor (134) and a humidity sensor (133) are arranged in the curing shed (131). An air conditioner (132) and a plurality of spray pipes (135) are arranged in the curing shed (131).

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