Large-span prefabricated box girder anti-cracking device and method

Abstract

The invention belongs to the technical field of prefabricated box girder construction, and particularly relates to a large-span prefabricated box girder anti-cracking device and method. A containing groove is formed in the inner wall of the connecting base. Hydraulic cylinders are embedded in the inner walls of the two sides of the containing groove. Clamping plates are mounted at the telescopic ends of the hydraulic cylinders; a plurality of limiting holes which are uniformly formed are formed in the surface of the clamping plate; a connecting assembly is jointly installed between the multiple clamping plates. The connecting assembly comprises a plurality of connecting rods; through cooperation between the multiple connecting rods and the connecting base, axial torsion of the prefabricated box girder is limited, and the situation that in the process of transporting the prefabricated box girder through the girder transporting vehicle, one side of the prefabricated box girder is stressed due to bumping and the like, and consequently large-angle axial torsion of the prefabricated box girder occurs is avoided; further, the prefabricated box girder is cracked, so that subsequent construction is influenced.

Description

Technical Field

[0001] The invention belongs to the technical field of prefabricated box girder construction, in particular to a device and method for preventing cracks of a large-span prefabricated box girder. Background Art

[0002] Prefabricated box girder is a concrete box girder that is prefabricated at a specific location outside a factory or construction site. Due to its relatively low price and fast construction speed, it is often used in the construction of various bridges, viaducts and tracks.

[0003] The prefabricated box girder in the prior art has a closed box-shaped cross-section, so it has a large bending bearing capacity and can effectively carry a large load without obvious bending. At the same time, the strength of the prefabricated box girder can be further strengthened by adding prestress during the manufacturing process to improve its crack resistance and rigidity.

[0004] In the prior art, prefabricated box girders, thanks to their cross-sectional shape and the addition of prestress, have a strong ability to resist cross-sectional torque, but the resistance of large-span prefabricated box girders to axial torque is relatively general. However, during transportation and lifting and transfer, prefabricated box girders may have an axial rolling tendency, which in turn causes axial torque to be generated inside the prefabricated box girder, thereby causing cracks in the large-span prefabricated box girder.

[0005] To this end, the present invention provides a device and method for preventing cracking of a large-span prefabricated box girder. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a large-span prefabricated box girder anti-cracking device described in the present invention comprises a plurality of connecting seats; the inner wall of the connecting seat is provided with a receiving groove; the inner walls on both sides of the receiving groove are inlaid with hydraulic cylinders; the telescopic ends of the hydraulic cylinders are equipped with clamping plates; the surface of the clamping plate is provided with a plurality of evenly arranged limiting holes; a connecting assembly is installed between the plurality of clamping plates; the connecting assembly comprises a plurality of connecting rods; one end of the connecting rod is rotatably connected with a sleeve; the inner wall of the sleeve and the surface of the side of the connecting rod away from the sleeve are both provided with threads; the connecting rod can be plugged into the limiting hole; the surface of the connecting rod is provided with a pair of sliding grooves; A pair of rotating rods are slidably connected inside the slide slot; a limit plate is rotatably connected between the two rotating rods; a stopper is threadedly connected to one end of the limit plate away from the slide slot; the surface of the clamping plate is rotatably connected to the limit ring at the corresponding position of the limit hole; a pair of slots are provided on the surface of the limit ring, and the slots are adapted to the limit plate; an arc groove is provided inside the limit ring; the arc groove is connected to the slot, and the arc groove is adapted to the limit plate; during operation, in order to reduce the axial torsion of the prefabricated box girder with a large span during transportation, which causes cracks in the prefabricated box girder, the embodiment of the present invention can be used for this purpose. First, the user needs to evenly arrange multiple connecting seats in a straight line, and then The prefabricated box beam is placed in the receiving groove on the surface of the connecting seat and is located between the two clamping plates. Then the hydraulic cylinder on the surface of the connecting seat will push the two clamping plates closer to each other, thereby clamping the surface of the prefabricated box beam. Finally, the clamping plates will be evenly fixed on the surface of the prefabricated box beam. Then the user inserts the connecting rod into the limiting hole on the surface of the clamping plate. Then the user rotates the limiting plate between the rotating rods so that it is perpendicular to the bottom of the slot. Then the user screws the push rod at the end of the limiting plate and finally presses the push rod against the bottom of the slot to fix the limiting plate. Then the upper connecting rods in the same straight line are connected together through the sleeve at the end of the connecting rod. Then the user slides the connecting rod so that each connection The rod drives the limit plate to move toward the slot on the surface of the limit ring, and finally the limit plate is inserted into the limit slot, and then the user rotates the connecting rod so that the connecting rod drives the limit plate to rotate into the arc groove inside the limit ring, thereby fixing the connecting seat and the connecting rod together. After that, the user can lift the prefabricated box girder together with the connecting seat to the beam transport vehicle for transportation. Through the cooperation between multiple connecting rods and connecting seats, the axial torsion of the prefabricated box girder is restricted, so as to avoid the beam transport vehicle from causing one side of the prefabricated box girder to be subjected to force due to bumps and other reasons during the transportation of the prefabricated box girder, resulting in a large-angle axial torsion of the prefabricated box girder, which in turn causes cracks in the prefabricated box girder, thereby affecting the subsequent construction.

[0008] Preferably, the outer surface of the limit ring is fixedly connected with a main gear; the adjacent gears are meshed and connected with a sub-gear; the sides of the limit plate are fixedly connected with magnet blocks; the connecting rod is made of magnetizable metal; during operation, when the user needs to rotate the limit ring on the same side, the user only needs to rotate one of the limit rings, and the rotating limit ring will drive the sub-gear meshing with it to rotate through the main gear on its surface, and the rotating sub-gear will drive another main gear meshing with it to rotate, and the main gear will drive the next main gear to rotate through another sub-gear, thereby realizing rotating one limit ring and driving the limit rings on this side to rotate synchronously, thereby avoiding the user from rotating the limit rings one by one, thereby reducing the user's operation amount, and the magnet block on the surface of the limit plate can also facilitate the user to adsorb the limit plate on the bottom of the slide groove when the connecting rod is not in use, thereby avoiding the limit plate from being damaged by external force collision during the storage process.

[0009] Preferably, one end of the push rod away from the limit plate is fixedly connected to a connecting column; one end of the connecting column away from the push rod is provided with a cross groove; the outer surface of the limit ring is provided with a through groove at the corresponding position of the slot, and the through groove is adapted to the connecting column; during operation, when the user needs to push the limit plate into the slot, the user can first rotate the limit plate in the slide slot to a state perpendicular to the bottom of the slide slot, and then slide the limit plate into the slot. At this time, the user again uses the through groove to press the screwdriver against the cross groove on the surface of the connecting column, and then the user turns the screwdriver to drive the push rod to rotate through the connecting column, and make the push rod press against the bottom of the slide slot, thereby completing the fixing of the limit plate. Therefore, the user does not need to fix the limit plate first, and then adjust the whole composed of multiple connecting rods to move the limit plate so that the limit plate on its surface is inserted into the slot, thereby reducing the operation difficulty of the user and improving the ease of use of the embodiment of the present invention.

[0010] Preferably, the top surfaces of the two clamping plates are fixedly connected with connecting plates; the surfaces of the connecting plates are provided with a plurality of evenly arranged rotating grooves; driving rollers are rotatably connected in the rotating grooves; the driving rollers are driven by servo motors; during operation, when the hydraulic cylinder drives the clamping plates to approach each other, the clamping plates may not be driven to clamp the prefabricated box beam first, but only the connecting plates may be enabled to be located on the top surface of the prefabricated box beam, at which time the connecting seat may be hung on the surface of the prefabricated box beam through the connecting plate, and then the user starts the driving roller in the rotating groove, and drives the connecting seat to move by the rotation of the driving roller, thereby facilitating the user to adjust the position of the connecting seat on the prefabricated box beam, so that multiple connecting seats can be evenly distributed on the surface of the prefabricated box beam.

[0011] Preferably, the bottom of the accommodating groove is fixedly connected with a plurality of evenly arranged shock absorbers; the top surface of the shock absorber is fixedly connected with a support plate; the clamping plate is slidably connected to the support plate; the telescopic end of the hydraulic cylinder is fixedly connected with a connecting block; the connecting block is slidably connected to the clamping plate; during operation, when the connecting seat is clamped by the clamping plate, the user needs to move and lift the prefabricated box girder and the connecting seat to the top surface of the beam transport vehicle, and then the user places the prefabricated box girder together with the connecting seat on the beam transport vehicle, and the two ends of the prefabricated box girder will drive the clamping plate and the support plate to descend, thereby causing relative sliding between the clamping plate and the slider, so that the support plate can be pressed on the top surface of the shock absorber, thereby reducing the torsion of the prefabricated box girder caused by vibration during the process of transporting the prefabricated box girder by the beam transport vehicle, thereby reducing the generation of cracks.

[0012] Preferably, a pair of storage grooves are provided at both sides of the bottom surface of the connecting seat; a support column is rotatably connected in the storage groove; a hook is rotatably connected to one end of the support column away from the rotational connection between the support column and the storage groove; a card slot is provided on the surface of the connecting seat at a position corresponding to the hook; a hanging rod is fixedly connected to the inside of the card slot; a plurality of rollers evenly arranged are rotatably connected to the bottom surface of the connecting seat; during operation, when the user needs to store and move the embodiment of the present invention, the user needs to first adjust the support column at the storage groove so that it is completely stored to the storage groove. The support column will replace the roller to contact the top surface of the beam transport vehicle, thereby preventing the roller from directly contacting the beam transport vehicle, causing the connecting seat to slide freely on the beam transport vehicle, and causing the prefabricated box girder to fall off the beam transport vehicle.

[0013] Preferably, both sides of the connecting seat are slidably connected to a pair of support seats; both sides of the connecting seat are fixedly connected to a hydraulic rod; the telescopic end of the hydraulic rod is fixedly connected to the top surface of the support seat; during operation, when the user needs to hang the connecting seat on the surface of the prefabricated box girder, the user needs to lift the prefabricated box girder, and then move the connecting seat to the bottom surface of the prefabricated box girder, and then the hydraulic rod drives the support seat to move toward the ground, and then the connecting seat is lifted, so that the prefabricated box girder is located between the two clamping plates at the top of the connecting seat, and then the user can normally drive the two clamping plates together so that the connecting plate can be hung on the top surface of the prefabricated box girder, and when the connecting plate is hung on the top of the prefabricated box girder, the hydraulic rod will drive the support seat to rise, and complete the retraction of the support seat, thereby facilitating the user to hang the connecting seat on the surface of the prefabricated box girder.

[0014] Preferably, both sides of the connecting seat are fixedly connected with upper baffles near the middle position; the side of the support seat close to the upper baffle is fixedly connected with a lower baffle; the upper baffle and the lower baffle are fixedly connected with a sealing plate at one end away from the connecting seat; during operation, when the embodiment of the present invention is used up, the user can place the connecting rod to be stored on the top surface of the lower baffle, and then the hydraulic rod will drive the support seat and the lower baffle to move toward the upper baffle, and press the sealing plates at the ends of the lower baffle and the upper baffle together, wrapping the connecting rod between the upper baffle, the lower baffle and the sealing plate, so as to facilitate the user to store the connecting rod.

[0015] Preferably, one side of the sealing plate is fixedly connected with a plurality of evenly arranged cross bars; the side of the upper baffle plate away from the cross bars is fixedly connected with a plurality of evenly arranged vertical bars; during operation, when the lower baffle plate is pressed against the upper baffle plate and the sealing plates are pressed together, the cross bars on the surface of the sealing plate can cooperate with the vertical bars on the surface of the upper baffle plate to evenly divide the space between the upper baffle plate, the lower baffle plate and the sealing plate, thereby facilitating the user to place the connecting rod. At the same time, the vertical bars and cross bars can also prevent the stored connecting rod from rolling at will, thereby achieving the fixation of the connecting rod, thereby reducing the probability of the connecting rod escaping from between the upper baffle plate, the lower baffle plate and the sealing plate.

[0016] Preferably, a method for preventing cracking of a large-span prefabricated box girder is provided, wherein the method adopts a device for preventing cracking of a large-span prefabricated box girder as described in any one of the above items, and comprises the following steps:

[0017] S1. When transporting a large-span prefabricated box girder, the user needs to first lift the prefabricated box girder, then push the connecting seat, and slide to the bottom of the prefabricated box girder through the rollers at the bottom of the connecting seat. Then the hydraulic rod will drive the support seat to move toward the ground, and then lift the connecting seat, so that the prefabricated box girder is located between the two clamping plates;

[0018] S2. When the prefabricated box beam is located between the clamping plates, the hydraulic cylinder drives the two clamping plates to approach each other, and makes the connecting plate on the top of the clamping plate located on the top surface of the prefabricated box beam. Then the hydraulic rod drives the support seat away from the ground. At this time, the connecting plate will be hung on the top surface of the prefabricated box beam, and the driving roller will contact the surface of the prefabricated box beam. Then the servo motor drives the driving roller to rotate, so that the connecting plate can drive the connecting seat to move on the surface of the prefabricated box beam, and the connecting seat is evenly distributed on the surface of the prefabricated box beam.

[0019] S3. When the connecting seats are evenly distributed on the surface of the prefabricated box girder, the user then inserts the connecting rod into the limiting hole on the surface of the clamping plate and fixes it through the limiting ring, and then connects the connecting rods on the same straight line through the sleeve at the end of the connecting rod to form a whole. After that, the user rotates the support column at the bottom of the connecting seat to make it rotate to a vertical state, and then the lifted prefabricated box girder can be placed on the moving beam vehicle and carry out the subsequent transportation process.

[0020] Preferably, the fixing of the limit ring and the connecting rod in S3 is achieved by rotating the limit plate on the surface of the connecting rod to make it perpendicular to the bottom of the slide groove, and then moving the connecting rod so that the limit plate is inserted into the slot, and then screwing the rod from the through groove to fix the limit plate, and finally screwing the connecting rod to slide the limit plate into the arc groove, thereby finally completing the fixing of the limit ring, the limit plate and the connecting rod.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The large-span prefabricated box girder anti-cracking device and method described in the present invention limits the axial torsion of the prefabricated box girder through the cooperation between multiple connecting rods and connecting seats, thereby preventing the prefabricated box girder from being subjected to force on one side due to bumps and the like during the transportation of the prefabricated box girder by the beam transport vehicle, resulting in large-angle axial torsion of the prefabricated box girder, thereby causing cracks in the prefabricated box girder, thereby affecting subsequent construction.

[0023] 2. The large-span prefabricated box girder anti-cracking device and method described in the present invention realizes the rotation of a limit ring through the cooperation of the secondary gear and the main gear, thereby driving the limit ring on that side to rotate synchronously, thereby avoiding the user from rotating the limit rings one by one, thereby reducing the user's operation workload. The magnet block on the surface of the limit plate can also facilitate the user to adsorb the limit plate on the bottom of the slide groove when the connecting rod is not in use, thereby avoiding the limit plate from being damaged by external force collision during the storage process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 is a stereogram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the connecting plate in the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the limiting hole in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the main gear in the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the arc groove in the present invention;

[0030] Figure 6 It is a structural schematic diagram of the connecting rod in the present invention;

[0031] Figure 7 It is a structural schematic diagram of the support column in the present invention;

[0032] Figure 8is a flow chart of the present invention;

[0033] In the figure: 1. connecting seat; 2. containing groove; 3. hydraulic cylinder; 4. clamping plate; 5. limiting hole; 6. connecting rod; 7. sleeve; 8. slide groove; 9. rotating rod; 10. limiting plate; 11. push rod; 12. limiting ring; 13. slot; 14. arc groove; 15. main gear; 16. secondary gear; 17. magnet block; 18. connecting column; 19. cross groove; 20. through groove; 21. connecting plate; 22. rotating groove; 23. driving roller; 24. shock absorber; 25. support plate; 26. connecting block; 27. storage groove; 28. supporting column; 29. ​​hook; 30. slot; 31. hanging rod; 32. roller; 34. supporting seat; 35. hydraulic rod; 36. upper baffle; 37. lower baffle; 38. sealing plate; 39. cross bar; 40. vertical bar. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] like Figures 1 to 5As shown, a large-span prefabricated box girder anti-cracking device according to an embodiment of the present invention comprises a plurality of connecting seats 1; an inner wall of the connecting seat 1 is provided with a receiving groove 2; hydraulic cylinders 3 are inlaid on the inner walls on both sides of the receiving groove 2; clamping plates 4 are installed on the telescopic ends of the hydraulic cylinders 3; a plurality of uniformly arranged limiting holes 5 are provided on the surface of the clamping plates 4; a connecting assembly is installed between the plurality of clamping plates 4; the connecting assembly comprises a plurality of connecting rods 6; a sleeve 7 is rotatably connected to one end of the connecting rod 6; threads are provided on the inner wall of the sleeve 7 and on the surface of the side of the connecting rod 6 away from the sleeve 7; the connecting rod 6 can be inserted into connected to the inside of the limiting hole 5; a pair of slide grooves 8 are provided on the surface of the connecting rod 6; a pair of rotating rods 9 are slidably connected inside the slide groove 8; a limiting plate 10 is rotatably connected between the two rotating rods 9; a stopper 11 is threadedly connected to the end of the limiting plate 10 away from the slide groove 8; the surface of the clamping plate 4 is rotatably connected to the limiting ring 12 at the corresponding position of the limiting hole 5; a pair of slots 13 are provided on the surface of the limiting ring 12, and the slots 13 are adapted to the limiting plate 10; an arc groove 14 is provided inside the limiting ring 12; the arc groove 14 is connected to the slot 13, and the arc groove 14 is adapted to the limiting plate 10;During operation, in order to reduce the axial torsion of the prefabricated box girder with a large span during transportation, which may cause cracks in the prefabricated box girder, an embodiment of the present invention can be used for this purpose. First, the user needs to evenly arrange multiple connecting seats 1 in a straight line, and then place the prefabricated box girder in the accommodating groove 2 on the surface of the connecting seat 1 and between the two clamping plates 4. Then the hydraulic cylinder 3 on the surface of the connecting seat 1 will push the two clamping plates 4 closer to each other, thereby clamping the surface of the prefabricated box girder. Finally, the clamping plates 4 will be evenly fixed on the surface of the prefabricated box girder. Then the user inserts the connecting rod 6 into the limiting hole 5 on the surface of the clamping plate 4, and then the user rotates the limiting plate 10 between the rotating rods 9 so that it is perpendicular to the bottom of the slide groove 8. Then the user screws the push rod 11 at the end of the limiting plate 10, and finally presses the push rod 11 against the bottom of the slide groove 8, thereby fixing the limiting plate 10, and then uses the connecting rod 6, the sleeve 7 at the end of the connecting rod 6 connects the upper connecting rods 6 in the same straight line together, and then the user slides the connecting rod 6 again, so that each connecting rod 6 drives the limiting plate 10 to move toward the slot 13 on the surface of the limiting ring 12, and the limiting plate 10 is finally inserted into the limiting groove, and then the user rotates the connecting rod 6 again, so that the connecting rod 6 drives the limiting plate 10 to rotate to the arc groove 14 inside the limiting ring 12, so as to fix the connecting seat 1 and the connecting rod 6 together, and then the messenger can lift the prefabricated box beam together with the connecting seat 1 to the beam transport vehicle for transportation. Through the cooperation between multiple connecting rods 6 and the connecting seat 1, the axial torsion of the prefabricated box beam is limited, so as to avoid the prefabricated box beam being subjected to force on one side due to bumps and other reasons during the transportation of the prefabricated box beam by the beam transport vehicle, resulting in large-angle axial torsion of the prefabricated box beam, and then cracks in the prefabricated box beam, thereby affecting subsequent construction. ;

[0036] like Figures 1 to 4 As shown, the outer surface of the limiting ring 12 is fixedly connected with a main gear 15; the adjacent gears are meshed with a sub-gear 16; the sides of the limiting plate 10 are fixedly connected with a magnet block 17; the connecting rod 6 is made of magnetizable metal; when working, when the user needs to rotate the limiting ring 12 on the same side, the user only needs to rotate one of the limiting rings 12, and the rotating limiting ring 12 will drive the sub-gear 16 meshed with it to rotate through the main gear 15 on its surface, and the rotating sub-gear 16 will drive the other meshed with it. A main gear 15 rotates, and the main gear 15 drives the next main gear 15 to rotate through another sub-gear 16, thereby rotating one limit ring 12 and driving the limit ring 12 on that side to rotate synchronously, thereby avoiding the user from rotating the limit rings 12 one by one, thereby reducing the user's operation amount, and the magnet block 17 on the surface of the limit plate 10 can also facilitate the user to adsorb the limit plate 10 on the bottom of the slide groove 8 when the connecting rod 6 is not in use, thereby avoiding the limit plate 10 from being damaged by external force collision during the storage process.

[0037] like Figures 5 and 6 As shown, the end of the push rod 11 away from the limiting plate 10 is fixedly connected with a connecting column 18; the end of the connecting column 18 away from the push rod 11 is provided with a cross groove 19; the outer surface of the limiting ring 12 is provided with a through groove 20 at the corresponding position of the slot 13, and the through groove 20 is adapted to the connecting column 18; when working, when the user needs to push the limiting plate 10 into the slot 13, the user can first rotate the limiting plate 10 in the slide groove 8 to a state perpendicular to the bottom of the slide groove 8, and then slide the limiting plate 10 into the slot 13, and then use The user then uses the through slot 20 to press the screwdriver into the cross slot 19 on the surface of the connecting column 18. Then, the user twists the screwdriver to drive the push rod 11 to rotate through the connecting column 18, and press the push rod 11 against the bottom of the slide slot 8, thereby completing the fixation of the limit plate 10. Therefore, the user does not need to fix the limit plate 10 first, and then adjust the whole composed of multiple connecting rods 6 to move the limit plate 10 so that the limit plate 10 on its surface is inserted into the slot 13, thereby reducing the user's operating difficulty and improving the usability of the embodiment of the present invention.

[0038] like Figures 2 to 3 As shown, the top surfaces of the two clamping plates 4 are fixedly connected with connecting plates 21; the surfaces of the connecting plates 21 are provided with a plurality of evenly arranged rotating grooves 22; the rotating grooves 22 are rotatably connected with driving rollers 23; the driving rollers 23 are driven by servo motors; during operation, when the hydraulic cylinder 3 drives the clamping plates 4 to approach each other, the clamping plates 4 may not be driven to clamp the prefabricated box beam first, but only the connecting plates 21 may be enabled to be located on the top surface of the prefabricated box beam, at which time the connecting seat 1 may be hung on the surface of the prefabricated box beam through the connecting plates 21, and then the user starts the driving rollers 23 in the rotating grooves 22, and the connecting seat 1 is driven to move by the rotation of the driving rollers 23, thereby facilitating the user to adjust the position of the connecting seat 1 on the prefabricated box beam, so that a plurality of connecting seats 1 can be evenly distributed on the surface of the prefabricated box beam.

[0039] like Figures 2 to 3 As shown, the bottom of the accommodating groove 2 is fixedly connected with a plurality of evenly arranged shock absorbers 24; the top surface of the shock absorber 24 is fixedly connected with a support plate 25; the clamping plate 4 is slidably connected to the support plate 25; the telescopic end of the hydraulic cylinder 3 is fixedly connected with a connecting block 26; the connecting block 26 is slidably connected to the clamping plate 4; during operation, when the connecting seat 1 is clamped by the clamping plate 4, the user needs to move and lift the prefabricated box girder and the connecting seat 1 to the top surface of the beam transport vehicle, and then the user places the prefabricated box girder together with the connecting seat 1 on the beam transport vehicle, and the two ends of the prefabricated box girder will drive the clamping plate 4 and the support plate 25 to descend, thereby causing relative sliding between the clamping plate 4 and the slider, so that the support plate 25 can be pressed on the top surface of the shock absorber 24, thereby reducing the torsion of the prefabricated box girder caused by vibration during the transportation of the prefabricated box girder by the beam transport vehicle, thereby reducing the generation of cracks.

[0040] like Figure 2 and Figure 7 As shown, a pair of receiving grooves 27 are provided at both sides of the bottom surface of the connecting seat 1; a support column 28 is rotatably connected in the receiving groove 27; a hook 29 is rotatably connected at one end of the support column 28 away from the rotatable connection between the support column 28 and the receiving groove 27; a slot 30 is provided at the surface of the connecting seat 1 at a position corresponding to the hook 29; a hanging rod 31 is fixedly connected inside the slot 30; a plurality of rollers 32 evenly arranged are rotatably connected to the bottom surface of the connecting seat 1; during operation, when the user needs to store and move the embodiment of the present invention, the user needs to first adjust the support column 28 at the receiving groove 27 so that it is completely stored in the receiving groove. 27, and hang the hook 29 on the hanging rod 31 in the card slot 30, so that the support column 28 is fixed in the storage slot 27. At this time, the roller 32 on the bottom surface of the connecting seat 1 can contact the ground, which is convenient for the user to push the connecting seat 1. When the connecting seat 1 needs to be placed on the beam transport vehicle, the user needs to remove the hook 29 from the surface of the hanging rod 31, and then rotate the support column 28 and make it perpendicular to the ground. Then the support column 28 will replace the roller 32 to contact the top surface of the beam transport vehicle, thereby preventing the roller 32 from directly contacting the beam transport vehicle, causing the connecting seat 1 to slide freely on the beam transport vehicle, and causing the prefabricated box girder to fall off the beam transport vehicle.

[0041] like Figures 2 to 3 As shown, both sides of the connecting seat 1 are slidably connected with support seats 34; both sides of the connecting seat 1 are fixedly connected with hydraulic rods 35; the telescopic ends of the hydraulic rods 35 are fixedly connected to the top surfaces of the support seats 34; during operation, when the user needs to hang the connecting seat 1 on the surface of the prefabricated box girder, the user needs to lift the prefabricated box girder, and then move the connecting seat 1 to the bottom surface of the prefabricated box girder, and then the hydraulic rods 35 drive the support seat 34 to move toward the ground, and then the connecting seat 1 is lifted, so that the prefabricated box girder is located between the two clamping plates 4 at the top of the connecting seat 1, and then the user can normally drive the two clamping plates 4 to move together, so that the connecting plate 21 can be hung on the top surface of the prefabricated box girder, and when the connecting plate 21 is hung on the top of the prefabricated box girder, the hydraulic rods 35 will drive the support seat 34 to rise, and complete the retraction of the support seat 34, thereby facilitating the user to hang the connecting seat 1 on the surface of the prefabricated box girder.

[0042] like Figures 2 to 3As shown, upper baffles 36 are fixedly connected to both sides of the connecting seat 1 near the middle position; a lower baffle 37 is fixedly connected to one side of the support seat 34 near the upper baffle 36; and a sealing plate 38 is fixedly connected to one end of the upper baffle 36 and the lower baffle 37 away from the connecting seat 1; during operation, when the embodiment of the present invention is finished using, the user can place the connecting rod 6 to be stored on the top surface of the lower baffle 37, and then the hydraulic rod 35 will drive the support seat 34 and the lower baffle 37 to move toward the upper baffle 36, and press the sealing plates 38 at the ends of the lower baffle 37 and the upper baffle 36 together, wrapping the connecting rod 6 between the upper baffle 36, the lower baffle 37 and the sealing plate 38, so as to facilitate the user to store the connecting rod 6.

[0043] like Figures 2 to 3 As shown, one side of the sealing plate 38 is fixedly connected with a plurality of uniformly arranged cross bars 39; the side of the upper baffle plate 36 away from the cross bars 39 is fixedly connected with a plurality of uniformly arranged vertical bars 40; during operation, when the lower baffle plate 37 presses against the upper baffle plate 36 and the sealing plates 38 are pressed together, the cross bars 39 on the surface of the sealing plate 38 can cooperate with the vertical bars 40 on the surface of the upper baffle plate 36 to evenly divide the space between the upper baffle plate 36, the lower baffle plate 37 and the sealing plate 38, thereby facilitating the user to place the connecting rod 6. At the same time, the vertical bars 40 and the cross bars 39 can also prevent the stored connecting rod 6 from rolling at will, thereby achieving the fixation of the connecting rod 6, thereby reducing the probability of the connecting rod 6 escaping from between the upper baffle plate 36, the lower baffle plate 37 and the sealing plate 38.

[0044] like Figure 8 As shown, a method for preventing cracks of a large-span prefabricated box girder is provided, wherein the method adopts a device for preventing cracks of a large-span prefabricated box girder as described in any one of the above items, and comprises the following steps:

[0045] S1. When transporting a large-span prefabricated box girder, the user needs to first lift the prefabricated box girder, then push the connecting seat 1, and slide to the bottom of the prefabricated box girder through the roller 32 at the bottom of the connecting seat 1. Then the hydraulic rod 35 will drive the support seat 34 to move toward the ground, thereby lifting the connecting seat 1, so that the prefabricated box girder is located between the two clamping plates 4;

[0046] S2. When the prefabricated box beam is located between the clamping plates 4, the hydraulic cylinder 3 drives the two clamping plates 4 to approach each other, and makes the connecting plate 21 on the top of the clamping plate 4 located on the top surface of the prefabricated box beam, and then the hydraulic rod 35 drives the support seat 34 away from the ground, at which time the connecting plate 21 will be hung on the top surface of the prefabricated box beam, and make the driving roller 23 contact with the surface of the prefabricated box beam, and then the servo motor drives the driving roller 23 to rotate, so that the connecting plate 21 can drive the connecting seat 1 to move on the surface of the prefabricated box beam, and make the connecting seat 1 evenly distributed on the surface of the prefabricated box beam;

[0047] S3. When the connecting seat 1 is evenly distributed on the surface of the prefabricated box beam, the user then inserts the connecting rod 6 into the limiting hole 5 on the surface of the clamping plate 4 and fixes it through the limiting ring 12, and then connects the connecting rods 6 on the same straight line through the sleeve 7 at the end of the connecting rod 6 to form a whole. After that, the user rotates the support column 28 at the bottom of the connecting seat 1 to make it rotate to a vertical state, and then the lifted prefabricated box beam can be placed on the moving beam vehicle and carry out the subsequent transportation process.

[0048] The fixing of the limit ring 12 and the connecting rod 6 described in S3 is achieved by rotating the limit plate 10 on the surface of the connecting rod 6 to make it perpendicular to the bottom of the slide groove 8, and then moving the connecting rod 6 so that the limit plate 10 is inserted into the slot 13, and then screwing the rod 11 from the through groove 20 to fix the limit plate 10, and finally screwing the connecting rod 6 to slide the limit plate 10 into the arc groove 14, thereby finally completing the fixing of the limit ring 12, the limit plate 10 and the connecting rod 6.

[0049] During operation, in order to reduce the axial torsion of the prefabricated box girder with a large span during transportation, which may cause cracks in the prefabricated box girder, an embodiment of the present invention can be used for this purpose. First, the user needs to evenly arrange multiple connecting seats 1 in a straight line, and then place the prefabricated box girder in the accommodating groove 2 on the surface of the connecting seat 1 and between the two clamping plates 4. Then the hydraulic cylinder 3 on the surface of the connecting seat 1 will push the two clamping plates 4 closer to each other, thereby clamping the surface of the prefabricated box girder. Finally, the clamping plates 4 will be evenly fixed on the surface of the prefabricated box girder. Then the user inserts the connecting rod 6 into the limiting hole 5 on the surface of the clamping plate 4, and then the user rotates the limiting plate 10 between the rotating rods 9 so that it is perpendicular to the bottom of the slide groove 8. Then the user screws the push rod 11 at the end of the limiting plate 10, and finally presses the push rod 11 against the bottom of the slide groove 8, thereby fixing the limiting plate 10, and then uses the connecting rod 6, connects the upper connecting rods 6 in the same straight line together, and then the user slides the connecting rods 6 again, so that each connecting rod 6 drives the limit plate 10 to move toward the slot 13 on the surface of the limit ring 12, and finally inserts the limit plate 10 into the limit groove, and then the user rotates the connecting rod 6 again, so that the connecting rod 6 drives the limit plate 10 to rotate into the arc groove 14 inside the limit ring 12, thereby fixing the connecting seat 1 and the connecting rod 6 together, and then the messenger can lift the prefabricated box girder together with the connecting seat 1 to the beam transport vehicle for transportation, through the cooperation between multiple connecting rods 6 and the connecting seat 1, the axial torsion of the prefabricated box girder is limited, so as to avoid the beam transport vehicle from causing one side of the prefabricated box girder to be subjected to force due to bumps and other reasons during the transportation of the prefabricated box girder, resulting in a large-angle axial torsion of the prefabricated box girder, and then causing cracks in the prefabricated box girder, thereby affecting the subsequent construction.

[0050] When the user needs to rotate the limit ring 12 on the same side, the user only needs to rotate one of the limit rings 12, and the rotating limit ring 12 will drive the meshing sub-gear 16 to rotate through the main gear 15 on its surface, and the rotating sub-gear 16 will drive another meshing main gear 15 to rotate, and the main gear 15 will drive the next main gear 15 to rotate through another sub-gear 16, thereby realizing rotating one limit ring 12 to drive the limit ring 12 on this side to rotate synchronously, thereby avoiding the user from rotating the limit rings 12 one by one, thereby reducing the user's operation amount, and the magnet block 17 on the surface of the limit plate 10 can also facilitate the user to adsorb the limit plate 10 on the bottom of the slide groove 8 when the connecting rod 6 is not in use, thereby avoiding the limit plate 10 from being damaged by external force during the storage process.

[0051] The limit plate 10 is rotated to a state perpendicular to the bottom of the slide groove 8, and then the limit plate 10 is slid into the slot 13. At this time, the user presses the screwdriver against the cross slot 19 on the surface of the connecting column 18 through the through slot 20. Then the user twists the screwdriver to drive the push rod 11 to rotate through the connecting column 18, and press the push rod 11 against the bottom of the slide groove 8, thereby completing the fixation of the limit plate 10. Therefore, the user does not need to fix the limit plate 10 first, and then adjust the whole composed of multiple connecting rods 6 to move the limit plate 10 so that the limit plate 10 on its surface is inserted into the slot 13, thereby reducing the user's operating difficulty and improving the usability of the embodiment of the present invention.

[0052] When the hydraulic cylinder 3 drives the clamping plates 4 to approach each other, the clamping plates 4 do not need to be driven to clamp the prefabricated box beam first, but only the connecting plate 21 can be located on the top surface of the prefabricated box beam. At this time, the connecting seat 1 can be hung on the surface of the prefabricated box beam through the connecting plate 21, and then the user starts the driving roller 23 in the rotating groove 22, and the connecting seat 1 is driven to move by the rotation of the driving roller 23, so that the user can adjust the position of the connecting seat 1 on the prefabricated box beam conveniently, so that multiple connecting seats 1 can be evenly distributed on the surface of the prefabricated box beam.

[0053] After the connecting seat 1 is clamped by the clamping plate 4, the user needs to move the prefabricated box girder and the connecting seat 1 to the top surface of the beam transport vehicle, and then the user places the prefabricated box girder together with the connecting seat 1 on the beam transport vehicle. The two ends of the prefabricated box girder will drive the clamping plate 4 and the support plate 25 to descend, thereby causing relative sliding between the clamping plate 4 and the slider, so that the support plate 25 can be pressed on the top surface of the shock absorber 24, thereby reducing the torsion of the prefabricated box girder caused by vibration during the transportation of the prefabricated box girder by the beam transport vehicle, thereby reducing the generation of cracks.

[0054] When the user needs to store and move the embodiment of the present invention, the user needs to first adjust the support column 28 at the storage slot 27 so that it is completely stored in the storage slot 27, and hang the hook 29 on the hanging rod 31 in the card slot 30, so as to fix the support column 28 in the storage slot 27. At this time, the roller 32 on the bottom surface of the connecting seat 1 can contact the ground, which is convenient for the user to push the connecting seat 1. When the connecting seat 1 needs to be placed on the beam transport vehicle, the user needs to remove the hook 29 from the surface of the hanging rod 31, and then rotate the support column 28 and make it perpendicular to the ground. Then the support column 28 will replace the roller 32 to contact the top surface of the beam transport vehicle, thereby avoiding the roller 32 directly contacting the beam transport vehicle, causing the connecting seat 1 to slide freely on the beam transport vehicle, and then causing the prefabricated box girder to fall off the beam transport vehicle.

[0055] When the user needs to hang the connecting seat 1 on the surface of the prefabricated box girder, the user needs to lift the prefabricated box girder, and then move the connecting seat 1 to the bottom surface of the prefabricated box girder, and then the hydraulic rod 35 drives the support seat 34 to move toward the ground, and then the connecting seat 1 is lifted, so that the prefabricated box girder is located between the two clamping plates 4 at the top of the connecting seat 1, and then the user can normally drive the two clamping plates 4 together so that the connecting plate 21 can be hung on the top surface of the prefabricated box girder, and when the connecting plate 21 is hung on the top of the prefabricated box girder, the hydraulic rod 35 will drive the support seat 34 to rise, and complete the retraction of the support seat 34, thereby facilitating the user to hang the connecting seat 1 on the surface of the prefabricated box girder.

[0056] When the embodiment of the present invention has been used, the user can place the connecting rod 6 to be stored on the top surface of the lower baffle 37, and then the hydraulic rod 35 will drive the support seat 34 and the lower baffle 37 to move toward the upper baffle 36, and press the sealing plates 38 at the ends of the lower baffle 37 and the upper baffle 36 together, wrapping the connecting rod 6 between the upper baffle 36, the lower baffle 37 and the sealing plate 38, thereby making it convenient for the user to store the connecting rod 6.

[0057] When the lower baffle plate 37 is pressed against the upper baffle plate 36 and the sealing plate 38 is pressed together, the cross bar 39 on the surface of the sealing plate 38 can cooperate with the vertical bar 40 on the surface of the upper baffle plate 36 to evenly divide the space between the upper baffle plate 36, the lower baffle plate 37 and the sealing plate 38, thereby facilitating the user to place the connecting rod 6. At the same time, the vertical bar 40 and the cross bar 39 can also prevent the stored connecting rod 6 from rolling at will, thereby achieving the fixation of the connecting rod 6, thereby reducing the probability of the connecting rod 6 escaping from between the upper baffle plate 36, the lower baffle plate 37 and the sealing plate 38.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large-span prefabricated box girder anti-cracking device, characterized in that: The invention comprises a plurality of connection seats (1); the inner wall of the connection seat (1) is provided with a receiving groove (2); the inner walls on both sides of the receiving groove (2) are inlaid with hydraulic cylinders (3); the telescopic ends of the hydraulic cylinders (3) are each installed with a clamping plate (4); the surface of the clamping plate (4) is provided with a plurality of evenly arranged limiting holes (5); a connection assembly is commonly installed between the plurality of clamping plates (4); the connection assembly comprises a plurality of connection rods (6); one end of the connection rod (6) is rotatably connected with a sleeve (7); the inner wall of the sleeve (7) and the surface of the side of the connection rod (6) away from the sleeve (7) are both provided with threads; the connection rod (6) can be inserted into the limiting hole (5); the connection rod (6) A pair of slide grooves (8) are provided on the surface; a pair of rotating rods (9) are slidably connected inside the slide grooves (8); a limit plate (10) is rotatably connected between the two rotating rods (9); an end of the limit plate (10) away from the slide groove (8) is threadedly connected to a push rod (11); the surface of the clamping plate (4) is rotatably connected to a limit ring (12) at a position corresponding to the limit hole (5); a pair of slots (13) are provided on the surface of the limit ring (12), and the slots (13) are matched with the limit plate (10); an arc groove (14) is provided inside the limit ring (12); the arc groove (14) is communicated with the slot (13), and the arc groove (14) is matched with the limit plate (10).

2. The large-span prefabricated box girder anti-cracking device according to claim 1 is characterized in that: The outer surface of the limiting ring (12) is fixedly connected to a main gear (15); adjacent gears are meshedly connected to each other with a secondary gear (16); the side of the limiting plate (10) is fixedly connected to a magnet block (17); the connecting rod (6) is made of a magnetizable metal; The end of the push rod (11) away from the limiting plate (10) is fixedly connected to a connecting column (18); the end of the connecting column (18) away from the push rod (11) is provided with a cross groove (19); the outer surface of the limiting ring (12) is provided with a through groove (20) at a position corresponding to the slot (13), and the through groove (20) is adapted to the connecting column (18).

3. The large-span prefabricated box girder anti-cracking device according to claim 1 is characterized in that: The top surfaces of the two clamping plates (4) are both fixedly connected with a connecting plate (21); the surface of the connecting plate (21) is provided with a plurality of evenly arranged rotating grooves (22); a driving roller (23) is rotatably connected in each of the rotating grooves (22); and the driving roller (23) is driven by a servo motor.

4. The large-span prefabricated box girder anti-cracking device according to claim 3 is characterized in that: The bottom of the accommodating groove (2) is fixedly connected to a plurality of uniformly arranged shock absorbers (24); the top surface of the shock absorber (24) is fixedly connected to a support plate (25); the clamping plate (4) is slidably connected to the support plate (25); the telescopic end of the hydraulic cylinder (3) is fixedly connected to a connecting block (26); and the connecting block (26) is slidably connected to the clamping plate (4).

5. The large-span prefabricated box girder anti-cracking device according to claim 4 is characterized in that: The bottom surface of the connection seat (1) is provided with a pair of receiving grooves (27) at both sides; a support column (28) is rotatably connected in the receiving groove (27); an end of the support column (28) away from the rotatable connection with the receiving groove (27) is rotatably connected to a hook (29); a clamping groove (30) is provided on the surface of the connection seat (1) at a position corresponding to the hook (29); a hanging rod (31) is fixedly connected inside the clamping groove (30); and a plurality of evenly arranged rollers (32) are rotatably connected to the bottom surface of the connection seat (1).

6. The large-span prefabricated box girder anti-cracking device according to claim 5 is characterized in that: A pair of support seats (34) are slidably connected to both sides of the connection seat (1); a hydraulic rod (35) is fixedly connected to both sides of the connection seat (1); and the telescopic end of the hydraulic rod (35) is fixedly connected to the top surface of the support seat (34).

7. The large-span prefabricated box girder anti-cracking device according to claim 6 is characterized in that: Upper baffles (36) are fixedly connected to both sides of the connection seat (1) near the middle; a lower baffle (37) is fixedly connected to one side of the support seat (34) near the upper baffle (36); and a sealing plate (38) is fixedly connected to the ends of the upper baffle (36) and the lower baffle (37) away from the connection seat (1).

8. The large-span prefabricated box girder anti-cracking device according to claim 7 is characterized in that: A plurality of evenly arranged cross bars (39) are fixedly connected to one side of the sealing plate (38); and a plurality of evenly arranged vertical bars (40) are fixedly connected to one side of the upper baffle plate (36) away from the cross bars (39).

9. A method for preventing cracks of a large-span prefabricated box girder, the method adopting a device for preventing cracks of a large-span prefabricated box girder as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. When transporting a large-span prefabricated box girder, the user needs to first lift the prefabricated box girder, then push the connecting seat (1), and slide to the bottom of the prefabricated box girder through the roller (32) at the bottom of the connecting seat (1), and then the hydraulic rod (35) will drive the support seat (34) to move toward the ground, thereby lifting the connecting seat (1) so that the prefabricated box girder is located between the two clamping plates (4); S2. When the prefabricated box beam is located between the clamping plates (4), the hydraulic cylinder (3) drives the two clamping plates (4) to approach each other, and makes the connecting plate (21) on the top of the clamping plates (4) located on the top surface of the prefabricated box beam, and then the hydraulic rod (35) drives the support seat (34) away from the ground. At this time, the connecting plate (21) is hung on the top surface of the prefabricated box beam, and makes the driving roller (23) contact with the surface of the prefabricated box beam, and then the servo motor drives the driving roller (23) to rotate, so that the connecting plate (21) can drive the connecting seat (1) to move on the surface of the prefabricated box beam, and make the connecting seat (1) evenly distributed on the surface of the prefabricated box beam; S3. When the connecting seat (1) is evenly distributed on the surface of the prefabricated box beam, the user then inserts the connecting rod (6) into the limiting hole (5) on the surface of the connecting seat (1) and fixes it through the limiting ring (12), and then connects the connecting rods (6) on the same straight line through the sleeve (7) at the end of the connecting rod (6) to form a whole. Then the user rotates the support column (28) at the bottom of the connecting seat (1) to make it rotate to a vertical state, and then the lifted prefabricated box beam can be placed on the moving beam vehicle and the subsequent transportation process can be carried out.

10. A method for preventing cracking of a large-span prefabricated box girder according to claim 9, characterized in that: The fixing of the limiting ring (12) and the connecting rod (6) described in S3 is achieved by rotating the limiting plate (10) on the surface of the connecting rod (6) to make it perpendicular to the bottom of the slide groove (8), and then moving the connecting rod (6) so that the limiting plate (10) is inserted into the slot (13), and then the abutting rod (11) is screwed from the through groove (20) so that the limiting plate (10) is fixed, and finally the connecting rod (6) is screwed so that the limiting plate (10) slides into the arc groove (14), thereby finally completing and fixing the limiting plate (10) and the connecting rod (6) through the limiting ring (12).

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