Steel box girder assembling and positioning device for bridge

Abstract

The application discloses a steel box girder assembling and positioning device for bridges, which comprises a steel box girder one and a steel box girder two, the top of the steel box girder one is provided with a centering active component, and the steel box girder two is provided with a centering matching component matched with the centering active component; the centering active component comprises a hydraulic cylinder, an extension rod, a sleeve rod and an expansion rod, the sleeve rod is rotatably sleeved on the extension rod, and the expansion rod is rotatably arranged on the sleeve rod; the centering matching component comprises a matching block and a centering sliding block, the matching block is provided with a counterbore in the middle, a plurality of groups of the centering sliding blocks are evenly arranged along the circumferential side of the counterbore, the centering sliding block is provided with an arc-shaped opening, one end of the matching block away from the steel box girder one is provided with a positioning hole, one end of the sleeve rod away from the hydraulic cylinder is provided with an angle positioning part, the angle positioning part is inserted into the positioning hole, and after the insertion, the sleeve rod is driven to rotate along with the swing of the steel box girder two; the steel box girder one is provided with a reset part for driving the sleeve rod to return to the initial position, the steel box girder to be spliced can be quickly and accurately positioned on the installed steel box girder, and the positioning is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridges, in particular to a steel box girder assembling and positioning device for bridges. BACKGROUND

[0002] The steel box girder, also known as the steel plate box girder, is a common structural form of long-span bridges and is generally used in bridges with large spans. It is called the steel box girder because its outer shape resembles a box. When hoisting a steel structure bridge, the steel box girder to be installed must be accurately aligned with the installed steel box girder in advance, and after accurate alignment, the two can be connected into a whole through welding.

[0003] The existing steel box girder assembling and positioning device for bridges with the authorization publication number CN218233172U includes a steel box girder one and a steel box girder two. The front and rear sides of the steel box girder one are provided with mounting frames one. In use, the steel box girder two is lifted from the ground by a crane, the motor one is turned to drive the threaded rod one to rotate, the nut one drives the sliding block one to slide, a part of the sliding block one slides out of the sliding groove one, the position of the steel box girder two is adjusted to make the sliding block two on the mounting frame three slide into the sliding groove two on the sliding block one, and the two sides of the steel box girder two are kept at the corresponding position and height by the sliding block two and the sliding groove two and the steel box girder one, thereby ensuring that the two sides of the steel box girder two do not shake during subsequent splicing, positioning and welding.

[0004] The existing scheme in the above has the following problems: Since the steel box girder is moved by hoisting equipment, it will shake during movement, making it difficult for the nut two to align with the positioning hole and for the sliding block two to align with the sliding groove one. The height position and horizontal angle of the steel box girder must be ensured by the hoisting device to achieve the alignment, therefore, the present application provides a steel box girder assembling and positioning device for bridges to solve the above problems. SUMMARY

[0005] The present application aims to provide a steel box girder assembling and positioning device for bridges to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a steel box girder assembling and positioning device for bridges, including a steel box girder one and a steel box girder two to be spliced, the top of the steel box girder one is provided with a centering active component, and the steel box girder two is provided with a centering matching component matched with the centering active component;

[0007] The centering active component includes a hydraulic cylinder, an extension rod, a sleeve rod and an expansion rod. The extension rod is fixed to the output end of the hydraulic cylinder, the sleeve rod is sleeved on the end of the extension rod away from the hydraulic cylinder and is rotationally connected with the extension rod, and the expansion rod is rotationally arranged on the sleeve rod.

[0008] The centering assembly comprises a fitting block and a centering slider, the fitting block is provided with a hole in the middle for the sleeve rod to pass through, the hole diameter is larger than the sleeve rod diameter, the centering slider is provided with multiple groups of uniform distribution along the hole circumferal side, the centering slider is slidingly arranged in the fitting block, the end of the centering slider facing the hole is provided with an arc-shaped opening matched with the sleeve rod outer wall, the fitting block is provided with a synchronous linkage assembly for driving all the centering sliders to slide radially along the hole synchronously, the end of the fitting block away from the steel box beam one is provided with a positioning hole, the end of the sleeve rod away from the hydraulic cylinder is provided with an angle positioning part for inserting into the positioning hole, the angle positioning part drives the sleeve rod to rotate following the swing of the steel box beam two after inserting into the positioning hole, the steel box beam one is provided with a reset member for driving the sleeve rod to reset to the initial position.

[0009] Preferably, the fitting block is provided with two groups, the steel box beam two top is fixed with a sliding rail for the fitting block to slide, the sliding rail middle is provided with a sliding groove, the fitting block bottom is provided with a sliding block for sliding connection with the sliding groove, the sliding rail is rotatably arranged in the sliding groove and provided with a long rod, the sliding block is provided with a rod hole for the long rod to pass through, the rod hole is provided with a spiral groove, the long rod is provided with a first guide shaft in the two rod holes for sliding fit with the spiral groove, the fitting block sliding drives the synchronous linkage assembly to drive the centering slider to move towards the hole center.

[0010] Preferably, the synchronous linkage assembly comprises a synchronous disc and a bridge plate, the synchronous disc is rotatably arranged in the fitting block, each group of centering sliders is provided with a guide rod near the synchronous disc, the synchronous disc is provided with an arc-shaped groove for the guide rod to slide at the position corresponding to each group of guide rods, the bridge plate is fixed on the steel box beam two top through the support leg, the bridge plate penetrates through the front and rear fitting blocks, the fitting block is slidingly arranged on the bridge plate, the bridge plate bottom is provided with a local spiral groove at the position corresponding to each group of synchronous discs, the synchronous disc outer wall is provided with a synchronous guide shaft for sliding fit with the local spiral groove.

[0011] Preferably, the sliding rail top is provided with multiple groups of clamping grooves uniformly distributed on both sides of the sliding groove, the fitting block bottom is provided with a clamping block for sliding up and down and matched with the clamping groove, one side of the clamping block is provided with an inclined surface.

[0012] Preferably, the expansion rod is provided with multiple groups along the sleeve rod circumferal side, one end of each group of expansion rods is fixed with a gear, the sleeve rod outer wall is provided with a long groove for the expansion rod to hide, both ends of the gear in the axial direction are provided with a short shaft, the inner wall of the long groove is provided with a rotating hole, the short shaft is rotatably connected with the rotating hole through a one-way bearing, the sleeve rod middle is provided with a driving member for driving the gear to rotate.

[0013] Preferably, the driving member is a toothed rod, the toothed rod is slidingly arranged in the sleeve rod middle in the axial direction, the toothed rod is provided with a tooth part matched with the gear on the end face of each group of expansion rods, one end of the toothed rod in the initial state is located at the sleeve rod outer end.

[0014] Preferably, the angular positioning part comprises a stop disc and a short rod, the stop disc is arranged on one end of the toothed rod outside the sleeve rod, the short rod is fixed on one end of the stop disc in the axial direction, the end of the toothed rod is provided with a short groove for sliding connection of the short rod, the inner end of the short groove is fixed with a spring, one end of the spring is fixedly connected with the end of the short rod, the outer periphery of the stop disc is fixed with a second guide shaft, the base is fixed on the matching block away from the sleeve rod, the base is fixed on the matching block through the connecting rod, the positioning hole is arranged on the base and coaxially arranged with the counterbore, the inner wall of the positioning hole is provided with an arc-shaped inclined step for abutting with the second guide shaft, and the end of the arc-shaped inclined step is provided with a positioning groove for clamping the second guide shaft.

[0015] Preferably, the end of the expansion rod for abutting with the matching block is rotationally provided with a ball.

[0016] Preferably, the reset member is a reset sleeve, the reset sleeve is sleeved on the outside of the sleeve rod and fixed on the steel box girder I through the fixing block, the inner wall of the reset sleeve is provided with an arc-shaped step plate, the lowest part of the arc-shaped step plate is provided with a positioning extension groove, the outer wall of the sleeve rod is provided with a third guide shaft for abutting with the top end face of the arc-shaped step plate, and the third guide shaft makes the sleeve rod reset to the initial angle position after passing through the positioning extension groove.

[0017] Preferably, the two sides of the steel box girder are fixedly provided with mounting racks, the inner side of the mounting rack is provided with a stabilizing groove, the two sides of the steel box girder II are provided with stabilizing plates for butt joint with the stabilizing groove, the side groove is arranged in the mounting rack in the stabilizing groove, the unidirectional gear is arranged in the side groove, and the outer wall of the stabilizing plate is provided with a rack meshing with the unidirectional gear.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] By arranging the sleeve rod on the telescopic rod of the hydraulic cylinder, the matching block is provided with an expansion hole with a diameter larger than that of the sleeve rod, the sleeve rod can be quickly passed through, the expansion rod is rotationally arranged on the sleeve rod, the expansion rod is rotated through the meshing of the gear and the toothed rod, when the expansion rod moves to the end of the matching block away from the hydraulic cylinder, the toothed rod abuts against the base to move and drive the expansion rod to rotate out to abut against the matching block, the expansion rod moves back with the sleeve rod to pull the matching block to move, and all the sliding blocks are driven by the synchronous linkage assembly to press the sleeve rod from one end provided with the arc-shaped opening, so that the steel box girder II and the steel box girder I are centered.

[0020] After the steel box girder II and the steel box girder I are centered, the steel box girder II will also rotate and deviate under the hoisting of the hoisting device, the sleeve rod is rotationally arranged on the telescopic rod, the second guide shaft of the stop disc will be clamped into the positioning groove under the action of the spring, so that the sleeve rod will rotate with the swing of the steel box girder II, after the sleeve rod is pulled back by the hydraulic cylinder, the third guide shaft on the sleeve rod will abut against the arc-shaped step plate to enter the positioning extension groove, so that the sleeve rod rotates back to the initial position, thereby the horizontal angle of the steel box girder II is aligned with the steel box girder I.

[0021] In summary, the sleeve rod follows the extension and retraction of the hydraulic cylinder and pulls the steel box girder to the side of the steel box girder through the expansion rod to realize automatic centering. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 is a structural schematic diagram of the whole application;

[0024] Figure 2 is a structural schematic diagram of the whole application highlighting the base on one side;

[0025] Figure 3 is an exploded schematic diagram of the angle positioning part, the tooth rod and the expansion rod of the present application;

[0026] Figure 4 is a structural schematic diagram of the ball on the expansion rod of the present application;

[0027] Figure 5 is a structural schematic diagram of the hole expansion position of the fitting block of the present application;

[0028] Figure 6 is Figure 5 is an enlarged schematic diagram of part A;

[0029] Figure 7 is an exploded schematic diagram of the synchronous disc, the fitting block and the bridge plate of the present application;

[0030] Figure 8 is a sectional view of the inside of the disc groove of the present application;

[0031] Figure 9 is a structural schematic diagram of the inside of the positioning hole of the base of the present application;

[0032] Figure 10 is a structural schematic diagram of the inside of the reset sleeve of the present application;

[0033] Figure 11 is a structural schematic diagram of the one-way gear of the present application.

[0034] In the drawings, the components represented by each reference numeral are listed as follows:

[0035] 1, steel box beam one; 2, steel box beam two; 3, centering active assembly; 31, hydraulic cylinder; 32, telescopic rod; 33, sleeve rod; 34, expansion rod; 4, centering matching assembly; 41, matching block; 42, centering slider; 5, counterbore; 6, synchronous linkage assembly; 7, positioning hole; 8, angle positioning part; 81, stop disc; 82, short rod; 9, reset sleeve; 10, slide rail; 11, sliding groove; 12, slider; 13, long rod; 14, rod hole; 15, helical groove; 16, first guide shaft; 17, clamping groove; 18, clamping block; 19, inclined surface; 20, gear; 21, long groove; 22, short shaft; 23, rotating hole; 24, one-way bearing; 25, toothed rod; 26, toothed part; 27, short groove; 28, spring; 29, second guide shaft; 50, base; 51, connecting rod; 52, arc-shaped inclined step; 53, positioning groove; 54, ball; 55, fixed block; 56, arc-shaped step plate; 57, positioning extension groove; 58, third guide shaft; 59, synchronous disc; 60, bridge plate; 61, guide rod; 62, arc-shaped groove; 63, support leg; 64, partial helical groove; 66, synchronous guide shaft; 67, disc groove; 68, slide; 69, bridge plate groove; 70, rotating area; 71, guide rod groove; 72, clamping block groove; 73, tension spring; 74, mounting frame; 75, stabilizing groove; 76, stabilizing plate; 77, side groove; 78, one-way gear; 79, rack; 80, toothed rod groove. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] Please refer to Figures 1-11 , the present application provides a technical solution:

[0038] Please refer to Figure 1 , the present application discloses a bridge steel box beam assembling and positioning device, aiming to solve the problem of difficult positioning caused by hoisting shaking in the existing steel box beam assembling process. Through the cooperative action of the centering active assembly 3 and the centering matching assembly 4, automatic centering and angle alignment of the steel box beam two 2 and the steel box beam one 1 are realized. The connection relationship, position relationship and working logic of each component are described in detail below.

[0039] Please refer to Figure 1 , 3, first, the device structure includes the installed steel box beam 1 and the steel box beam 2 to be spliced, wherein the centering active component 3 is arranged on the top of the steel box beam 1, and the centering matching component 4 is arranged on the top of the steel box beam 2, the centering active component 3 and the centering matching component 4 can be fixed on the steel box beam by pre-welding or bolt, which is convenient for disassembly after use, and the two form a cooperation to complete positioning during assembly. The core components of the centering active component 3 are hydraulic cylinder 31, telescopic rod 32, sleeve rod 33 and expansion rod 34, the hydraulic cylinder 31 is fixedly installed at the preset position on the top of the steel box beam 1, one end of the telescopic rod 32 is fixedly connected with the output end of the hydraulic cylinder 31, the sleeve rod 33 is sleeved on the end of the telescopic rod 32 away from the hydraulic cylinder 31, and the sleeve rod 33 and the telescopic rod 32 are connected in a rotating manner, so that the sleeve rod 33 can rotate around the axis of the telescopic rod 32; the expansion rod 34 is uniformly provided with a plurality of groups along the circumferential side of the sleeve rod 33, a long slot 21 for accommodating the expansion rod 34 is formed on the outer wall of the sleeve rod 33, one end of each group of expansion rods 34 is fixedly connected with a gear 20, the two ends of the gear 20 in the axial direction are respectively provided with a short shaft 22, the inner wall of the long slot 21 is provided with a rotating hole 23 corresponding to the position of the short shaft 22, the short shaft 22 is rotatably connected with the rotating hole 23 through a one-way bearing 24, so that the expansion rod 34 can only be one-way rotated out of the sleeve rod 33, and a driving member is slidably arranged on the middle part of the sleeve rod 33 in the axial direction, the driving member is a gear rod 25, the end face of each group of expansion rods 34 is provided with a tooth part 26 engaged with the gear 20, and the gear rod 25 has one end extending out of the sleeve rod 33 in the initial state, so as to cooperate with other components subsequently, wherein the middle part of the sleeve rod 33 is provided with a gear rod slot 80 for sliding of the gear rod 25, and the gear rod slot 80 is communicated with each long slot 21.

[0040] Referring to Figure 1 , 5,6, Correspondingly, the centering assembly 4 comprises a fitting block 41, a centering slider 42 and a synchronous linkage assembly 6. The fitting block 41 is provided with two groups. The top of the steel box girder 2 is fixedly provided with a sliding rail 10 for the fitting block 41 to slide. The middle part of the sliding rail 10 is provided with a sliding groove 11. The bottom of the fitting block 41 is integrally provided with a sliding block 12 matched with the sliding groove 11. The sliding block 12 is embedded in the sliding groove 11 and forms a sliding connection with the sliding groove 11. The sliding rail 10 is rotatably installed in the inside of the sliding groove 11 and provided with a long rod 13. The sliding block 12 is provided with a rod hole 14 for the long rod 13 to pass through. The inner wall of the rod hole 14 is provided with a spiral groove 15. The long rod 13 is provided with a first guide shaft 16 in the rod hole 14 of the two groups of sliding blocks 12. The first guide shaft 16 forms a sliding fit with the spiral groove 15. When the long rod 13 rotates, the two groups of fitting blocks 41 can be driven to synchronously approach along the sliding groove 11 through the cooperation of the first guide shaft 16 and the spiral groove 15. Meanwhile, the top of the sliding rail 10 is uniformly provided with a plurality of clamping grooves 17 on both sides of the sliding groove 11. The bottom of the fitting block 41 is provided with a clamping block groove 72. The clamping block groove 72 is provided with a clamping block 18 sliding up and down. The bottom of the clamping block 18 is provided with an inclined surface 19. When the fitting block 41 slides to the target position, the clamping block 18 can be embedded in the clamping groove 17 under the action of its own gravity or elastic members (the elastic members include tension springs 73), realizing the temporary fixation of the fitting block 41. The arrangement of the inclined surface 19 makes the fitting block 41 slide in one direction only.

[0041] Referring to Figure 1 , 5-8. Multiple sets of centering sliders 42 are evenly arranged around the circumference of the enlarged hole 5 in the middle of the mating block 41. The middle of the mating block 41 has an enlarged hole 5 for the sleeve rod 33 to pass through. The diameter of the enlarged hole 5 is larger than the diameter of the sleeve rod 33 so that the sleeve rod 33 can still be easily passed through when the hoisting is swaying. The centering slider 42 is slidably arranged in the preset slide rail 68 inside the mating block 41, and the end of the centering slider 42 facing the enlarged hole 5 has an arc-shaped opening that matches the outer wall of the sleeve rod 33, ensuring that the centering slider 42 can achieve stable limiting and centering positioning when it is in contact with the outer wall of the sleeve rod 33; the synchronous linkage component 6 is used to drive all the centering sliders 42. The sliding block 42 slides synchronously along the radial direction of the enlarged hole 5. The synchronous linkage assembly 6 includes a synchronous disc 59 and a bridge plate 60. The mating block 41 is provided with a disc groove 67. The synchronous disc 59 is rotatably installed inside the mating block 41 through the disc groove 67. Each set of centering sliders 42 has a guide rod 61 fixed on the side near the synchronous disc 59. The synchronous disc 59 has an arc-shaped groove 62 for the guide rod 61 to slide at the position corresponding to each set of guide rods 61. The end of the guide rod 61 away from the centering slider 42 is embedded in the arc-shaped groove 62 and forms a sliding fit with the arc-shaped groove 62. The bridge plate 60 is fixedly installed on the top of the steel box girder 2 through the support legs 63. A bridge plate 60 extends along the length of the steel box girder 2 through two sets of mating blocks 41. Each mating block 41 has a bridge plate groove 69 through which the bridge plate 60 passes. The mating blocks 41 and the bridge plate 60 are slidably connected via the bridge plate groove 69. The bottom of the bridge plate 60 has a local spiral groove 64 corresponding to the position of each set of synchronous discs 59. A synchronous guide shaft 66 is fixed to the outer wall of the synchronous disc 59. The synchronous guide shaft 66 is embedded in the local spiral groove 64 and forms a sliding fit with it (the bottom of the bridge plate 60 is a concave arc surface, and the local spiral groove 64 is set on the concave arc surface to ensure that the synchronous guide shaft 66 is in a sliding fit within the local spiral groove 64). (It will not get stuck when sliding in the groove 64) When the mating block 41 slides along the bridge plate 60, the sliding of the synchronous guide shaft 66 in the local spiral groove 64 will drive the synchronous disk 59 to rotate. The rotation of the synchronous disk 59 will drive all the centering sliders 42 to move synchronously closer to or away from the center of the enlarged hole 5 through the cooperation of the arc groove 62 and the guide rod 61. It should be noted that: the top of the disk groove 67 is provided with a rotating area 70. The synchronous guide shaft 66 extends into the bridge plate groove 69 through the rotating area 70 and forms a sliding cooperation with the local spiral groove 64. The mating block 41 has a guide rod groove 71 between the disk groove 67 and the slide 68 for the guide rod 61 to slide.

[0042] See Figure 1 , 3, 9, in addition, the matching block 41 away from the steel box beam one 1 one end is also provided with angle positioning structure, the matching block 41 away from the steel box beam one 1 one side fixedly installed with base 50, base 50 is fixed on the matching block 41 through connecting rod 51, connecting rod 51 will not affect the expansion rod 34, base 50 is set on the opening 7, the positioning hole 7 and the matching block 41 middle part's expansion hole 5 coaxial arrangement, the sleeve rod 33 away from the hydraulic cylinder 31 one end is equipped with angle positioning part 8, this angle positioning part 8 includes the disc 81 and the short rod 82, the disc 81 is arranged in the toothed rod 25 one end outside the sleeve rod 33, the short rod 82 is fixed in the disc 81 middle part, the toothed rod 25 end part corresponds the short groove 27 that is set in the short rod 82 position, the short groove 27's inner end is fixedly connected with spring 28, spring 28's other end is fixedly connected with the short rod 82 end part, so that the short rod 82 can be elastically slid in the short groove 27, the short rod 82 is non-circular rod, the disc 81 periphery is fixedly provided with second guide shaft 29, the inner wall of positioning hole 7 is provided with arc inclined step 52, which is in contact with the second guide shaft 29, the end of the arc inclined step 52 is provided with a positioning slot 53 for the second guide shaft 29, when the sleeve rod 33 is inserted into the expansion hole 5 and the disc 81 is close to the base 50, if the disc 81 is not coaxial with the positioning hole 7, the disc 81 will be in contact with the end surface of the base outside the positioning hole 7, the driving toothed rod 25 is moved and driven by the cooperation with the gear 20 to make the expansion rod 34 rotate out of the sleeve rod 33, by the expansion rod 34, a group of matching blocks 41 provided with the base 50 is pulled to the side of the hydraulic cylinder 31, which will make the multiple groups of centering sliding blocks 42 in the matching block 41 move towards the expansion hole 5 and press the outer wall of the sleeve rod 33, after all the centering sliding blocks 42 press the sleeve rod 33, the positioning hole 7 will be coaxial with the disc 81, under the action of the spring 28, the disc 81 will be popped into the positioning hole 7 and be in contact with the arc step through the second guide shaft 29, so that the second guide shaft 29 is finally inserted into the positioning slot 53, so that the sleeve rod 33 can rotate synchronously with the swing of the steel box beam two 2, it should be noted that the diameter of the disc 81 is smaller than the diameter of the sleeve rod 33.

[0043] Refer to Figure 1 , 10 , in order to reset the sleeve rod 33 after rotating, the steel box beam one 1 is provided with a reset member, which is specifically a reset sleeve 9, the reset sleeve 9 is sleeved outside the sleeve rod 33, and the reset sleeve 9 is fixedly connected with the top of the steel box beam one 1 through the fixed block 55, the inner wall of the reset sleeve 9 is fixedly provided with an arc step plate 56, the lowest part of the arc step plate 56 is provided with a positioning extension slot 57, the outer wall of the sleeve rod 33 is fixedly provided with a third guide shaft 58, the third guide shaft 58 will be in contact with the top end surface of the arc step plate 56 when the sleeve rod 33 rotates, when the sleeve rod 33 moves to the side of the steel box beam one 1 under the pull of the hydraulic cylinder 31, the third guide shaft 58 will slide along the end surface of the arc step plate 56, and finally slide into the positioning extension slot 57, so that the sleeve rod 33 is limited in the initial angle position, thereby driving the horizontal angle of the steel box beam two 2 to be aligned with the steel box beam one 1.

[0044] Referring to Figure 1 , 3 , 4, in order to be easier to rotate in the process of the expansion rod 34 abutting against the matching block 41 and driving the matching block 41 to slide, a ball 54 is arranged on the side of the expansion rod 34 abutting against the matching block 41 after being opened, so that the friction between the expansion rod 34 and the matching block 41 can be reduced when the expansion rod 34 is rotated along the sleeve rod 33 for adjusting the horizontal angle position of the steel box girder two 2.

[0045] Referring to Figure 1 , 11 Meanwhile, in order to improve the stability during the assembling process of the steel box girder, the two sides of the steel box girder one 1 are respectively fixedly installed with mounting racks 74, the inner side of the mounting rack 74 is provided with a stabilizing groove 75, and the two sides of the steel box girder two 2 are fixedly provided with stabilizing plates 76 at positions corresponding to the stabilizing groove 75, the size of the stabilizing plate 76 is matched with the stabilizing groove 75, when the sleeve rod 33 is returned to the initial position through the reset member, at this time, the steel box girder two 2 and the steel box girder one 1 are in the completely aligned position, at this time, the stabilizing plate 76 will be opposite to the stabilizing groove 75; the inner side wall of the mounting rack 74 is provided with a side groove 77, a one-way gear 78 is rotatably installed in the side groove 77 through a rotating shaft, and the outer wall of the stabilizing plate 76 is provided with a rack 79 engaged with the one-way gear 78, when the steel box girder two 2 approaches the steel box girder one 1, the rack 79 is engaged with the one-way gear 78 for transmission, and the one-way rotation characteristic of the one-way gear 78 (rotatably arranged in the side groove 77 through a one-way bearing 24) can prevent the steel box girder two 2 from reversely sliding during the positioning process, further ensuring the assembling stability.

[0046] Referring to Figures 1-11In the actual assembly operation, first, the steel box girder two 2 is hoisted to the splicing position of the steel box girder one 1 by hoisting equipment, the hydraulic cylinder 31 is started, the hydraulic cylinder 31 drives the telescopic rod 32 to extend, drives the sleeve rod 33 to move to one side of the steel box girder two 2, and because the diameter of the hole 5 on the matching block 41 is greater than the diameter of the sleeve rod 33, even if the steel box girder two 2 shakes during hoisting, the sleeve rod 33 can still smoothly penetrate into the hole 5; with the continuous advancement of the sleeve rod 33, the end of the toothed rod 25 extending out of the sleeve rod 33 abuts against the base 50, the toothed rod 25 slides along the sleeve rod 33 in the axial direction under the abutting pushing force, the teeth 26 on the toothed rod 25 are engaged with the gear 20 at one end of the expansion rod 34, the gear 20 drives the expansion rod 34 to rotate out of the long groove 21 around the short shaft 22 in one direction, until the toothed rod 25 completely slides into the sleeve rod 33, the hydraulic cylinder 31 starts to reverse contraction, the matching block 41 is pulled to one side of the steel box girder one 1 through the telescopic rod 32, the sleeve rod 33 and the expansion rod 34, the sliding block 12 at the bottom of the matching block 41 slides along the sliding groove 11 of the sliding rail 10, at the same time, the matching block 41 slides along the bridge plate 60, the synchronous shaft 66 slides in the local helical groove 64 at the bottom of the bridge plate 60 and drives the synchronous disc 59 to rotate, the synchronous disc 59 drives all the centering sliding blocks 42 to move to the center of the hole 5 through the arc-shaped groove 62 and the guide rod 61, until the arc-shaped openings of all the centering sliding blocks 42 are tightly fitted with the outer wall of the sleeve rod 33, the transverse centering of the steel box girder two 2 and the steel box girder one 1 is realized, after the transverse centering of the steel box girder two 2 and the steel box girder one 1, the abutting disc 81 will be coaxial with the positioning hole 7, the spring 28 drives the abutting disc 81 to pop into the positioning hole 7, the second guide shaft 29 will abut against the arc-shaped inclined step 52 and finally be clamped into the positioning groove 53, in this process, the abutting disc 81 will rotate and drive the sleeve rod 33 to rotate through the toothed rod 25, when the hydraulic cylinder 31 continues to contract and pull the sleeve rod 33 to approach the steel box girder one 1, the third guide shaft 58 on the outer wall of the sleeve rod 33 abuts against the arc-shaped step plate 56 on the inner wall of the reset sleeve 9, with the movement of the sleeve rod 33, the third guide shaft 58 slides along the arc-shaped step plate 56 and finally enters the positioning extension groove 57, the sleeve rod 33 is reset to the initial angle, so that the second guide shaft 29 abuts against the inner wall of the positioning groove 53 and drives the steel box girder two 2 to rotate to the position opposite to the steel box girder one 1; after the centering and angle centering are completed, the stabilizing plate 76 gradually embeds into the stabilizing groove 75 of the mounting frame 74, the gear rack 79 is engaged with the one-way gear 78 to prevent the steel box girder two 2 from sliding reversely, at this time, the positioning operation of the steel box girder two 2 and the steel box girder one 1 is completed, and the subsequent welding connection can be carried out.

[0047] In conclusion, the present embodiment realizes the automatic centering and angle alignment of the steel box girder two 2 with the steel box girder one 1 under the hoisting and shaking condition by the accurate cooperation of the centering active assembly 3 and the centering cooperation assembly 4, the extension and retraction of the sleeve rod 33 driven by the hydraulic cylinder 31, the support and pulling of the expansion rod 34, the synchronous centering of the synchronous linkage assembly 6 and the angle resetting of the resetting member, solves the problems of the complex operation of the existing positioning device and the large influence of the shaking on the positioning precision, and the connection relationship and position layout of each component are reasonable, so that the stability and reliability of the device as a whole are ensured, and the high-precision positioning requirement of the bridge steel box girder assembly is met

[0048] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0049] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning in the specific situation by those skilled in the art.

[0050] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that modifications can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A bridge steel box girder assembly and positioning device, comprising a first steel box girder (1) and a second steel box girder (2) to be assembled, characterized in that: The top of the first steel box girder (1) is provided with an active centering component (3), and the second steel box girder (2) is provided with an active centering component (4) that cooperates with the active centering component (3). The centering active component (3) includes a hydraulic cylinder (31), a telescopic rod (32), a sleeve rod (33), and an expansion rod (34). The telescopic rod (32) is fixed on the output end of the hydraulic cylinder (31). The sleeve rod (33) is sleeved on the end of the telescopic rod (32) away from the hydraulic cylinder (31) and forms a rotatable connection with the telescopic rod (32). The expansion rod (34) is rotatably mounted on the sleeve rod (33). The centering assembly (4) includes a mating block (41) and a centering slider (42). The mating block (41) has an enlarged hole (5) in the middle for the sleeve rod (33) to pass through. The diameter of the enlarged hole (5) is larger than the diameter of the sleeve rod (33). Multiple sets of centering sliders (42) are evenly arranged around the enlarged hole (5). The centering sliders (42) are slidably disposed in the mating block (41). The end of the centering slider (42) facing the enlarged hole (5) has an arc-shaped opening that matches the outer wall of the sleeve rod (33). The mating block (41) is provided with a synchronous linkage assembly (6) that drives all the centering sliders (42) to slide synchronously along the radial direction of the enlarged hole (5). The end of the mating block (41) away from the steel box girder (1) has a positioning hole (7). The end of the sleeve rod (33) away from the hydraulic cylinder (31) has a positioning hole for insertion. (7) Angle positioning part (8), after the angle positioning part (8) is inserted into the positioning hole (7), it drives the sleeve rod (33) to rotate following the swing of the steel box beam (2). The steel box beam (1) is provided with a reset component to drive the sleeve rod (33) to reset to the initial position. The reset component is a reset sleeve (9). The reset sleeve (9) is sleeved on the outside of the sleeve rod (33) and fixed to the steel box beam (1) by a fixing block (55). The inner wall of the reset sleeve (9) is provided with an arc-shaped step plate (56). The lowest point of the arc-shaped step plate (56) is provided with a positioning extension groove (57). The outer wall of the sleeve rod (33) is provided with a third guide shaft (58) for abutting against the top end face of the arc-shaped step plate (56). After the third guide shaft (58) passes through the positioning extension groove (57), the sleeve rod (33) is reset to the initial angle position. The expansion rod (34) is provided with multiple sets along the periphery of the sleeve rod (33). One end of each set of expansion rods (34) is fixed with a gear (20). The outer wall of the sleeve rod (33) is provided with a long groove (21) for hiding the expansion rod (34). The gear (20) is provided with short shafts (22) at both ends in the axial direction. The inner wall of the long groove (21) is provided with a rotating hole (23). The short shaft (22) is rotatably connected to the rotating hole (23) through a one-way bearing (24). The middle part of the sleeve rod (33) is provided with a driving component for driving the gear (20) to rotate. The driving component is a rack (25). The rack (25) is slidably disposed in the middle of the sleeve (33) along the axial direction of the sleeve (33). The rack (25) is provided with teeth (26) that mesh with the gear (20) on the end face facing each set of expansion rods (34). In the initial state, one end of the rack (25) is located at the outer end of the sleeve (33). The angle positioning part (8) includes a stop plate (81) and a short rod (82). The stop plate (81) is disposed on the end of the rack (25) outside the sleeve rod (33). The short rod (82) is fixed on the axial end of the stop plate (81). The end of the rack (25) is provided with a short groove (27) for sliding connection of the short rod (82). A spring (28) is fixed inside the short groove (27). One end of the spring (28) is fixedly connected to the end of the short rod (82). A second guide is fixed on the outer periphery of the stop plate (81). A base (50) is fixed on a mating block (41) on the side away from the sleeve rod (33) of the shaft (29). The base (50) is fixed on the mating block (41) by a connecting rod (51). A positioning hole (7) is set on the base (50) and is coaxial with the enlarged hole (5). The inner wall of the positioning hole (7) is provided with an arc-shaped inclined step (52) for abutting against the second guide shaft (29). The end of the arc-shaped inclined step (52) is provided with a positioning groove (53) for the second guide shaft (29) to be inserted.

2. The bridge steel box girder assembly and positioning device according to claim 1, characterized in that: The mating block (41) is provided in two sets. The top of the steel box girder (2) is fixed with a slide rail (10) for the mating block (41) to slide. The middle of the slide rail (10) is provided with a sliding groove (11). The bottom of the mating block (41) is provided with a slider (12) that is slidably connected to the sliding groove (11). The slide rail (10) is provided with a long rod (13) that rotates in the sliding groove (11). The slider (12) is provided with a rod hole (14) for the long rod (13) to pass through. The rod hole (14) is provided with a spiral groove (15). The long rod (13) is provided with a first guide shaft (16) that is slidably connected to the spiral groove (15) in the two sets of rod holes (14). The sliding of the mating block (41) causes the synchronous linkage component (6) to drive the centering slider (42) to move toward the center of the enlarged hole (5).

3. The bridge steel box girder assembly and positioning device according to claim 2, characterized in that: The synchronous linkage component (6) includes a synchronous disk (59) and a bridge plate (60). The synchronous disk (59) is rotatably disposed in the mating block (41). Each set of centering sliders (42) is provided with a guide rod (61) on the side near the synchronous disk (59). The synchronous disk (59) is provided with an arc groove (62) for sliding of the guide rod (61) at each set of guide rods (61). The bridge plate (60) is fixed to the top of the steel box girder (2) by a support leg (63). The bridge plate (60) passes through the front and rear sets of mating blocks (41). The mating blocks (41) are slidably disposed on the bridge plate (60). The bottom of the bridge plate (60) is provided with a local spiral groove (64) corresponding to each set of synchronous disks (59). The outer wall of the synchronous disk (59) is provided with a synchronous guide shaft (66) that forms a sliding fit with the local spiral groove (64).

4. The bridge steel box girder assembly and positioning device according to claim 2, characterized in that: The top of the slide rail (10) is evenly provided with multiple sets of slots (17) on both sides of the sliding groove (11). The bottom of the mating block (41) is provided with a locking block (18) that mates with the slots (17). One side of the locking block (18) is provided with an inclined surface (19).

5. The bridge steel box girder assembly and positioning device according to claim 1, characterized in that: The end of the expansion rod (34) that is used to abut against the mating block (41) is provided with a ball (54).

6. The bridge steel box girder assembly and positioning device according to claim 1, characterized in that: The steel box girder one (1) is fixed with mounting brackets (74) on both sides. The mounting brackets (74) are provided with stabilizing grooves (75) on the inner side. The steel box girder two (2) is provided with stabilizing plates (76) on both sides for docking with the stabilizing grooves (75). The mounting brackets (74) are provided with side grooves (77) in the stabilizing grooves (75). The side grooves (77) are provided with one-way gears (78). The outer wall of the stabilizing plate (76) is provided with racks (79) that mesh with the one-way gears (78).

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