A novel bridge deck lifting device and use method thereof

Abstract

The present invention discloses a novel bridge deck lifting device, wherein each diamond truss corresponds to a lifting system, the lifting system includes a wire rope winding system, a sliding trolley and a balance beam sling, the sliding trolley is slidably connected to the load-bearing beam, the sliding trolley includes a longitudinal displacement base and a transverse displacement base capable of synchronously moving in the same direction; the wire rope winding system includes a winch, a fixed pulley block, a movable pulley block and a straddle guide wheel, the fixed pulley block is installed on two transverse displacement bases, the straddle guide wheel is located between the two fixed pulley blocks, and the axis direction of the straddle guide wheel is perpendicular to the axis direction of the fixed pulley block; the balance beam sling includes a sling beam, a lifting connection assembly with an adjustable center of gravity is installed in the middle of the sling beam, and connecting rigging is symmetrically installed at both ends of the sling beam. The present invention also discloses a method for using a novel bridge deck lifting device. The present invention can solve the problems of inconvenient transverse adjustment of steel box beam sections and the inability to match the lifting weight center with the sling center in the existing bridge deck construction.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a novel bridge deck lifting device and a use method thereof. Background Art

[0002] A bridge deck crane is a cantilever crane for bridge decks. It is mainly used for the assembly and construction of steel box girders or other standard beam sections for highways and cross-river and cross-sea bridges. The machine is used to safely and accurately lift the steel box girder sections on the beam transport ship (or steel trestle) to the bridge deck for alignment assembly and welding. It can also be used for the lifting of other beam blocks or steel beams.

[0003] During the assembly of steel box girder sections, in order to facilitate the bridge crane to adjust the steel box girder connection, traditional bridge cranes are often designed with variable-length mechanisms so that the steel box girder sections can be dropped to the designed positions. However, the variable-length mechanism bridge crane can only adjust the position of the steel box girder section longitudinally (i.e., the position of the wire rope lifting point) while keeping the height position unchanged, but cannot adjust the position of the steel box girder section laterally, which makes it inconvenient to align the steel box girder sections. In addition, when hoisting the steel box girder section, the center of the steel box girder section may shift. If the hoisting point position cannot be adjusted, the hoisting weight center and the center of gravity of the movable pulley block cannot be kept consistent, affecting the hoisting construction. Summary of the invention

[0004] The purpose of the present invention is to provide a novel bridge deck lifting device and a method of use, so as to solve the problems of inconvenient lateral adjustment of steel box girder sections and the mismatch between the lifting weight center and the lifting device center occurring in the existing bridge deck installation and construction.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A novel bridge deck lifting device comprises a main truss, a lifting system and a traveling system, wherein the main truss comprises two oppositely arranged rhombus trusses, a connecting rod is horizontally fixed between the rhombus trusses, and each rhombus truss comprises a load-bearing beam, a lower cross bar, a rear diagonal bar, a vertical bar and a front diagonal bar;

[0007] Each diamond truss corresponds to a group of lifting systems, and the lifting system includes a wire rope winding system, a sliding trolley and a balance beam hanger. The sliding trolley is arranged on the load-bearing beam, and the sliding trolley includes a longitudinal movement base and a transverse movement base. A push-pull cylinder is installed between the longitudinal movement base and the load-bearing beam, a longitudinal movement slide is fixed at the bottom of the longitudinal movement base, a longitudinal movement slide is fixed on the load-bearing beam along its length direction, and the longitudinal movement slide is slidably connected to the longitudinal movement slide; two transverse movement bases are symmetrically arranged, a transverse movement cylinder is arranged between the two transverse movement bases, the cylinder barrel of the transverse movement cylinder is fixed to the middle part of the longitudinal movement base, and two piston rods of the transverse movement cylinder are respectively hinged to the two transverse movement bases, a transverse movement slide is fixed on the longitudinal movement base, a transverse movement slide is fixed at the bottom of the transverse movement base, the transverse movement slide is slidably connected to the transverse movement slide, and the extension direction of the transverse movement slide is perpendicular to the extension direction of the longitudinal movement slide.

[0008] The wire rope winding system includes a winch, a fixed pulley block, a movable pulley block, a straddling guide wheel and a traveling guide wheel. The winch is arranged at the end of the lower cross bar away from the balance beam sling. Two fixed pulley blocks are arranged and are respectively installed on two transverse displacement bases. The two fixed pulley blocks are respectively located on both sides of the load-bearing beam. The straddling guide wheel is installed on the longitudinal displacement slide and is located between the two fixed pulley blocks. The axis direction of the straddling guide wheel is perpendicular to the axis direction of the fixed pulley block. A support frame is installed at the end of the load-bearing beam close to the winch, and a cruise ship shaft is fixed on the support frame. The traveling guide wheel is sleeved on the cruise ship shaft. The traveling guide wheel is slidably connected to the cruise ship shaft, and the axis of the cruise ship shaft is parallel to the axis of the fixed pulley block.

[0009] The balancing beam sling comprises a sling beam, a lifting connection assembly with an adjustable center of gravity is installed in the middle of the sling beam, the lifting connection assembly comprises a hanging plate, a connecting plate, a sling cylinder, an adjusting screw and a movable nut. The hanging plates are provided with two and are symmetrically arranged at the front and rear sides of the sling beam, the movable pulley group is rotatably connected between the two hanging plates, the connecting plates are at least provided with two and are respectively located at the upper and lower sides of the sling beam, the connecting plates are fixedly connected between the two hanging plates, the cylinder barrel of the sling cylinder is hinged to the sling beam, the piston rod of the sling cylinder is hinged to one of the connecting plates, the adjusting screw is slidably connected to the other connecting plate, the two ends of the adjusting screw pass through the connecting plate and are fixedly connected to the sling beam, at least two movable nuts are threadedly connected to the adjusting screw, and the movable nuts are respectively located at the two sides of the connecting plate, the axis of the piston rod of the sling cylinder and the axis of the adjusting screw are parallel to the length extension direction of the sling beam; the two ends of the sling beam are symmetrically installed with connecting rigging for lifting the suspended object.

[0010] Optionally, a wing beam is fixed on each side of each load-bearing beam, the wing beam is arranged parallel to the load-bearing beam, a secondary slide rail is fixed on the wing beam along its length direction, a secondary slide is fixed at the bottom of the longitudinal movement base, the secondary slide is slidably connected to the secondary slide rail, and the length of the wing beam is greater than the longitudinal movement stroke of the sliding crane.

[0011] Optionally, sliding guide wheels and rope tail weight sensors are respectively provided on both sides of each load-bearing beam. The wire rope wound by the winch is turned by the sliding guide wheels and then connected to the movable pulley group and the fixed pulley group in sequence. The sliding guide wheels and the rope tail weight sensor are respectively connected with hangers, which are slidingly connected to the wing beam. The hangers are detachably connected to the bottom of the longitudinal movement base through a connecting rod. Positioning holes are evenly spaced on the wing beam along its length direction, and a positioning pin shaft that can pass through the slide groove is installed on the hanger.

[0012] Optionally, a longitudinal movement anti-hook cooperating with the load-bearing beam is fixed to the bottom of the longitudinal movement base, and a transverse movement anti-hook cooperating with the longitudinal movement base is fixed to the bottom of the transverse movement base.

[0013] Optionally, the connecting rigging includes a shoulder pole beam and a flexible sling, the shoulder pole beam being horizontally fixed at the end of the sling beam, the axis of the shoulder pole beam being perpendicular to the length extension direction of the sling beam, a group of limiting components being respectively provided at both ends of the shoulder pole beam, a group of limiting components including at least two sling limit plates fixedly connected to the shoulder pole beam, and after the flexible sling passes around the pulley and the shoulder pole beam on the suspended object, the two ends of the flexible sling are respectively connected to the sling limit plates through shackles.

[0014] Optionally, the travel system includes a whole machine longitudinal movement track and a crane transverse movement mechanism. The whole machine longitudinal movement track is arranged in parallel below the lower cross bar. The lower cross bar is slidably connected to the whole machine longitudinal movement track, and a whole machine anti-hook is arranged between the lower cross bar and the whole machine longitudinal movement track. The crane transverse movement mechanism includes a crane cylinder, a transverse movement slide and a lifting cylinder. One end of the lifting cylinder is fixed to the lower end of the lower cross bar. The axis of the crane cylinder is perpendicular to the length extension direction of the lower cross bar. The cylinder barrel of the crane cylinder is fixed on the open space on one side of the whole machine longitudinal movement track, and the piston rod of the crane cylinder faces the side of the whole machine longitudinal movement track.

[0015] Optionally, the uprights of the diamond truss are vertically arranged on the diagonal lines of the diamond truss, and the load-bearing beam is suspended beyond the end surface of the installed steel main beam.

[0016] The present invention also discloses a method for using a novel bridge deck lifting device, including the novel bridge deck lifting device mentioned above, and comprising the following steps:

[0017] Step S1, preparation work before hoisting: installation and inspection of the crane;

[0018] Step S2, the beam transport ship is in place, and the wire rope winding system lowers the balance beam hoist to the top of the steel box beam section to be hoisted;

[0019] Step S3, flexibly connecting the balance beam sling to the steel box beam section to be hoisted through the connecting rigging, so as to realize the rapid connection of the hoisting points under the bumpy conditions and reduce the time of waterway occupation; after the balance beam sling is connected, the steel wire rope is slowly tightened to make each hoisting point evenly stressed;

[0020] Step S4, check the stress condition of the lifting point, ensure that the force is balanced, and then lift the bridge step by step until it reaches the bridge deck position for matching.

[0021] In step S3, if the steel box girder section is not horizontal, the lifting point position is adjusted by moving the movable pulley group on the balance beam hoist relative to the horizontal position of the hoist beam to ensure that the steel box girder section is lifted horizontally and uniform force is applied; during the winding process of the wire rope, the load-bearing beam is subjected to reasonable force by riding on the guide wheel, and the wire rope deflection angle is reduced by the movable guide wheel.

[0022] In step S4, when the steel box girder section is hoisted to the bridge deck position, the steel box girder section is first made flush with the surface height of the installed beam section, and then the longitudinal position and transverse position of the steel box girder section are adjusted by the sliding crane to slowly approach and align the steel box girder section with the installed beam section. When the sliding crane moves longitudinally and transversely, fine-tuning is repeated until the hoisted steel box girder section is aligned with the installed beam section.

[0023] By adopting the above technical solution, the present invention has the following advantages:

[0024] The present invention provides a transverse movement base that can synchronously move in the same direction on the longitudinal movement base, and also provides a straddling guide wheel, and connects the fixed pulley blocks installed on the two transverse movement bases to a wire rope winding system, which can not only realize the adjustment in the length direction and width direction of the load-bearing beam respectively, and facilitate the assembly and alignment of the steel box beam sections, but also avoids the use of two winches in conjunction with two fixed pulley blocks that can move transversely, so that the force on the load-bearing beam is more reasonable and reliable; at the same time, the present invention provides a lifting connection assembly with an adjustable center of gravity on the sling beam, pushes and pulls the lifting connection assembly to a suitable position by the sling cylinder, and then limits the lifting connection assembly by a movable nut, so as to realize the adjustment of the lifting point position, facilitate the adjustment of the sling center of gravity, and keep it consistent with the center of gravity of the hanging weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front view of one embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A top view of

[0027] Figure 3 yes Figure 1 Right view of;

[0028] Figure 4 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0029] Figure 5 yes Figure 4 One of the schematic diagrams of the transverse movement of the middle sliding overhead crane (the direction indicated by the arrow in the figure is the transverse movement direction);

[0030] Figure 6yes Figure 4 Schematic diagram of the transverse movement of the middle sliding overhead crane (the direction indicated by the arrow in the figure is the transverse movement direction);

[0031] Figure 7 is a schematic diagram of a wire rope winding system in one embodiment of the present invention;

[0032] Figure 8 is a schematic diagram of the relative positions of the traveling guide wheel and the winch in one embodiment of the present invention;

[0033] Fig. 9 yes Figure 8 Installation diagram of the mid-stream guide wheel;

[0034] Fig.10 is a schematic diagram of the longitudinal movement of a sliding overhead travelling crane in one embodiment of the present invention;

[0035] Fig.11 It is a schematic diagram of the installation of a sliding guide wheel and a rope tail weight sensor in one embodiment of the present invention;

[0036] Fig.12 yes Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0037] Fig.13 is a schematic structural diagram of a balance beam hanger in one embodiment of the present invention;

[0038] Fig.14 yes Fig.13 Schematic diagram of the local structure from top view.

[0039] Reference numerals: 11, load-bearing beam, 12, lower cross bar, 13, rear diagonal bar, 14, vertical bar, 15, front diagonal bar;

[0040] 21. Longitudinal movement base, 211. Longitudinal movement hook, 22. Longitudinal movement slide, 23. Longitudinal movement rail, 24. Push-pull cylinder, 25. Transverse movement base, 251. Transverse movement hook, 26. Transverse movement cylinder, 27. Transverse movement rail, 28. Transverse movement slide;

[0041] 31. wing beam, 311. positioning hole, 32. auxiliary slide rail, 33. auxiliary slide seat, 34. rope tail weight sensor, 35. hanger, 351. positioning pin shaft, 352. connecting rod;

[0042] 41. winch, 42. fixed pulley block, 43. movable pulley block, 44. straddling guide wheel, 45. sliding guide wheel, 46. traveling guide wheel, 47. support frame, 48. cruise ship shaft;

[0043] 51. Spreader beam, 52. Hanging plate, 53. Connecting plate, 54. Spreader cylinder, 541. Install hinge seat, 542. Adjustment plate, 543. Install hole, 55. Adjustment screw, 56. Movable nut; 57. Shoulder pole beam, 58. Flexible sling, 59. Sling limit plate;

[0044] 61. Longitudinal movement track of the whole machine, 62. Crane cylinder, 63. Transverse movement slide plate, 64. Lifting cylinder. DETAILED DESCRIPTION

[0045] In order to make the technical purpose, technical scheme and beneficial effects of the present invention clearer, the following Figure 1-14 The technical solution of the present invention is further illustrated with specific embodiments.

[0046] An embodiment of a novel bridge deck lifting device:

[0047] A novel bridge deck lifting device includes a main truss, a lifting system and a traveling system. The main truss includes two relatively arranged rhombus trusses, and a connecting rod is horizontally fixed between the rhombus trusses. Each rhombus truss includes a load-bearing beam 11, a lower cross bar 12, a rear diagonal bar 13, a vertical bar 14 and a front diagonal bar 15.

[0048] Each diamond truss corresponds to a group of lifting systems, which include a wire rope winding system, a sliding trolley and a balance beam hanger. The sliding trolley is arranged on the load-bearing beam 11. The sliding trolley includes a longitudinal base 21 and a transverse base 25. A push-pull cylinder 24 is installed between the longitudinal base 21 and the load-bearing beam 11. The cylinder barrel and piston rod of the push-pull cylinder 24 are respectively hinged to the load-bearing beam 11 and the longitudinal base 21. A longitudinal slide 22 is fixed to the bottom of the longitudinal base 21. The slide can adopt an MGE slide. A longitudinal slide rail 23 is fixed on the load-bearing beam 11 along its length direction. The longitudinal slide 22 is slidably connected with the longitudinal slide rail 23; There are two symmetrical transverse bases 25, and a transverse cylinder 26 is arranged between the two transverse bases 25. The transverse cylinder 26 adopts a double-piston rod hydraulic cylinder. The two piston rods share a piston. When one piston rod is extended, the other piston rod is retracted. The cylinder barrel of the transverse cylinder 26 is fixed at the middle of the longitudinal base 21. The two piston rods of the transverse cylinder 26 are hinged to the two transverse bases 25 respectively. A transverse slide rail 27 is fixed on the longitudinal base 21, and a transverse slide seat 28 is fixed at the bottom of the transverse base 25. The transverse slide seat 28 is slidably connected to the transverse slide rail 27, and the extension direction of the transverse slide rail 27 is perpendicular to the extension direction of the longitudinal slide rail 23.

[0049] By setting the longitudinal movement base 21 and the push-pull cylinder 24, the sliding crane can be moved in the length direction of the load-bearing beam 11; by setting the transverse movement base 25 and the transverse movement cylinder 26, the fixed pulley groups 42 on both sides can be synchronously moved in the same direction to the required distance. At the same time, compared with the cylinder with a single piston rod set on the same side of the two transverse movement bases 25, the transverse movement cylinder 26 with a double piston rod is set between the two transverse movement bases 25, which saves more space.

[0050] like Figure 7 As shown, the wire rope winding system includes a winch 41, a fixed pulley block 42, a movable pulley block 43, a straddling guide wheel 44 and a movable guide wheel 46. The winch 41 is arranged at the end of the lower cross bar 12 away from the balance beam hanger. There are two sets of fixed pulley blocks 42 and they are respectively installed on two transverse bases 25. The two sets of fixed pulley blocks 42 are respectively located on both sides of the load-bearing beam 11 through the transverse bases 25. The straddling guide wheel 44 is installed on the longitudinal sliding seat 22 and is located between the two sets of fixed pulley blocks 42. The axial direction of the straddling guide wheel 44 is perpendicular to the axial direction of the fixed pulley blocks 42.

[0051] By setting a straddling guide wheel 44 at a 90-degree angle to the fixed pulleys between the two sets of fixed pulleys 42, the wire rope can cross the load-bearing beam 11 and be wound on the other side, so that the load-bearing beam 11 is subjected to reasonable force. This is more economical and reliable than the method of winding the ropes of two winches 41 on both sides of the same load-bearing beam 11.

[0052] like Figures 7 to 9 As shown, a support frame 47 is installed at the end of the load-bearing beam 11 close to the winch 41, and a cruise ship shaft 48 is fixed on the support frame 47. The movable guide wheel 46 is sleeved on the cruise ship shaft 48, and the movable guide wheel 46 is slidably connected to the cruise ship shaft 48. The axis of the cruise ship shaft 48 is parallel to the axis of the fixed pulley group 42.

[0053] The wire rope wound by the winch 41 first passes through the traveling guide wheel 46 and then enters the movable pulley group 43 and the fixed pulley group 42, or first enters the sliding guide wheel 45 that can move along the wing beam 31 after passing through the traveling guide wheel 46, and then enters the movable pulley group 43 and the fixed pulley group 42, which can effectively reduce the deflection angle of the wire rope on the drum of the winch 41, is beneficial to the arrangement of the wire rope on the drum, and is beneficial to the good operation of the wire rope winding system.

[0054] like Fig.13As shown, the balance beam sling includes a sling beam 51, and a lifting connection assembly with an adjustable center of gravity is installed in the middle of the sling beam 51. The lifting connection assembly includes a hanging plate 52, a connecting plate 53, a sling cylinder 54, an adjusting screw 55 and a movable nut 56. The hanging plate 52 is provided with two pieces and is symmetrically arranged on the front and rear sides of the sling beam 51. The movable pulley group 43 is rotatably connected between the two hanging plates 52. The connecting plates 53 are provided with at least two pieces and are respectively located on the upper and lower sides of the sling beam 51. The connecting plates 53 are fixedly connected between the two hanging plates 52. The cylinder barrel of the sling cylinder 54 is hinged to the sling beam 51, the piston rod of the sling cylinder 54 is hinged to one of the connecting plates 53, and the adjusting screw 55 is slidably connected to the other connecting plate 53. Dynamic connection, the adjusting screw 55 passes through the two ends of the connecting plate 53 and is fixedly connected to the sling beam 51 through fixing nuts. At least two movable nuts 56 are threadedly connected to the adjusting screw 55, and the movable nuts 56 are respectively located on the left and right sides of the connecting plate 53. The axis of the piston rod of the sling cylinder 54 and the axis of the adjusting screw 55 are parallel to the length extension direction of the sling beam 51. By adjusting the position of the movable nut 56, the sling cylinder 54 is pushed and pulled and then locked by the movable nut 56, the lifting point position of the sling beam 51 can be moved, which is convenient for adjusting the balance beam sling when the center of gravity of the lifting weight is offset, so as to keep the center of gravity of the lifting weight consistent with the center of gravity of the movable pulley block 43; the two ends of the sling beam 51 are symmetrically installed with connecting rigging for lifting the suspended object.

[0055] like Fig.13 As shown, an adjustment plate 542 is also fixedly mounted on the hanger beam 51, and a plurality of mounting holes 543 are evenly spaced on the adjustment plate 542 along the length direction of the hanger beam 51. The cylinder barrel of the hanger oil cylinder 54 is hinged with a mounting hinge seat 541, and the mounting hinge seat 541 is fixedly mounted at one of the mounting holes 543. The limit travel position of the movable pulley block 43 can be adjusted by changing the relative position of the mounting hinge seat 541 and the adjustment plate 542.

[0056] Furthermore, as one of the embodiments of the present invention, a wing beam 31 is fixed on each side of each load-bearing beam 11, the wing beam 31 is arranged parallel to the load-bearing beam 11, an auxiliary slide rail 32 is fixed on the wing beam 31 along its length direction, an auxiliary slide seat 33 is fixed at the bottom of the longitudinal movement base 21, the auxiliary slide seat 33 is slidably connected to the auxiliary slide rail 32, and the length of the wing beam 31 is greater than the longitudinal movement stroke of the sliding crane.

[0057] On the one hand, the wing beam 31 can serve as a secondary load-bearing component of the fixed pulley group 42 to make the entire system more reliable. On the other hand, it can be used to bear the load of the sliding guide wheel 45 and the rope tail weight sensor 34. The sliding guide wheel 45 here refers to the sliding guide wheel 45 that the wire rope coming out of the winch 41 passes around, and after passing around the sliding guide wheel 45, it enters the first movable pulley downward, and then goes up and around the first fixed pulley.

[0058] Further, as one of the embodiments of the present invention, Fig.10 and Fig.11 As shown, a sliding guide wheel 45 and a rope tail weight sensor 34 are respectively provided on both sides of each load-bearing beam 11. The wire rope wound by the winch 41 is turned by the sliding guide wheel 45 and then connected to the movable pulley group 43 and the fixed pulley group 42 in sequence. The sliding guide wheel 45 and the rope tail weight sensor 34 are respectively connected with a hanger 35, the hanger 35 is slidably connected to the wing beam 31, and the hanger 35 is detachably connected to the bottom of the longitudinal displacement base 21 through a connecting rod 352. Positioning holes 311 are evenly spaced on the wing beam 31 along its length direction, and a positioning pin shaft 351 that can pass through the slide groove is installed on the hanger 35.

[0059] When the sliding overhead travelling vehicle moves a long distance longitudinally along the length direction of the load beam 11, the fixed pulley block 42 also moves a long distance accordingly. If the sliding guide wheel 45 and the rope tail weight sensor 34 maintain the same position, the wire rope branches on the sliding guide wheel 45 and the rope tail weight sensor 34 will have a large deflection angle, which is not conducive to the winding of the wire rope. In this embodiment, a hanger 35 that can slide along the wing beam 31 is provided. When unloaded, the hanger 35 is connected to the longitudinal displacement base 21 through a connecting rod 352, and the positioning pin 351 is pulled out, so that the sliding guide wheel 45 and the rope tail weight sensor 34 can move a certain distance with the longitudinal displacement base 21. After the longitudinal displacement is completed, the positioning pin 351 can be re-inserted into the hanger 35 and the positioning hole 311 to position the hanger 35. An operating platform is set up inside the diamond truss, and the action of inserting and removing the positioning pin 351 can be completed manually standing on the operating platform.

[0060] Furthermore, as one of the embodiments of the present invention, a longitudinal movement anti-hook 211 cooperating with the load-bearing beam 11 is fixed to the bottom of the longitudinal movement base 21, and a transverse movement anti-hook 251 cooperating with the longitudinal movement base 21 is fixed to the bottom of the transverse movement base 25, so as to provide reliable limiting during the longitudinal and transverse movement of the sliding crane and prevent the sliding crane from horizontally deflecting or overturning in unexpected circumstances.

[0061] Further, as one of the embodiments of the present invention, Fig.14 As shown, the connecting rigging includes a shoulder pole beam 57 and a flexible sling 58. The shoulder pole beam 57 is horizontally fixed at the end of the sling beam 51. The axis of the shoulder pole beam 57 is perpendicular to the length extension direction of the sling beam 51. A group of limiting components are respectively arranged at both ends of the shoulder pole beam 57. A group of limiting components includes at least two sling limit plates 59 fixedly connected to the shoulder pole beam 57. The space between the two sling limit plates 59 is the winding space of the flexible sling 58. After the flexible sling 58 passes around the pulley and the shoulder pole beam 57 on the suspended object, its two ends are respectively connected to the sling limit plates 59 through shackles.

[0062] The flexible sling 58 is used and the connection position of the flexible sling 58 and the shoulder pole beam 57 is concentrated between the two sling limit plates 59, which can ensure balanced force and avoid errors in the sling point position.

[0063] Further, as one of the embodiments of the present invention, Fig.12 As shown, the traveling system includes a whole machine longitudinal moving track 61 and a crane transverse moving mechanism. The whole machine longitudinal moving track 61 is arranged in parallel below the lower cross bar 12. The lower cross bar 12 is slidably connected to the whole machine longitudinal moving track 61, and a whole machine anti-hook is arranged between the lower cross bar 12 and the whole machine longitudinal moving track 61. The crane transverse moving mechanism includes a crane cylinder 62, a transverse moving slide 63 and a lifting cylinder 64. One end of the lifting cylinder 64 is fixed at the lower end of the lower cross bar 12. The axis of the crane cylinder 62 is perpendicular to the length extension direction of the lower cross bar 12. The cylinder barrel of the crane cylinder 62 is fixed on the open space on one side of the whole machine longitudinal moving track 61, and the piston rod of the crane cylinder 62 faces the side of the whole machine longitudinal moving track 61.

[0064] When the crane needs to move laterally, the whole machine is lifted to an appropriate height through the lifting cylinder 64, the transverse sliding plate 63 is placed under the longitudinal moving track 61 of the whole machine, and then the lifting cylinder 64 is retracted. The longitudinal moving track 61 of the whole machine and the whole machine sit on the transverse sliding plate 63, and the crane cylinder 62 is activated to push the whole machine to move laterally.

[0065] Furthermore, as one of the embodiments of the present invention, the uprights 14 of the rhombus truss are vertically arranged on the diagonal lines of the rhombus truss, and the load-bearing beam 11 is suspended beyond the end surface of the installed steel main beam.

[0066] The present invention also discloses a method for using a novel bridge deck lifting device, including the novel bridge deck lifting device mentioned above, and comprising the following steps:

[0067] Step S1, preparation work before hoisting: installation and inspection of the crane;

[0068] Step S2, the beam transport ship is in place, and the wire rope winding system lowers the balance beam hoist to the top of the steel box beam section to be hoisted;

[0069] Step S3, flexibly connecting the balance beam sling to the steel box beam section to be hoisted through the connecting rigging, so as to realize the rapid connection of the hoisting points under the bumpy conditions and reduce the time of waterway occupation; after the balance beam sling is connected, the steel wire rope is slowly tightened to make each hoisting point evenly stressed;

[0070] Step S4, check the stress condition of the lifting point, ensure that the force is balanced, and then lift the bridge step by step until it reaches the bridge deck position for matching.

[0071] In step S3, if the steel box girder section is not level, the lifting point position is adjusted by moving the movable pulley group 43 on the balance beam hanger relative to the horizontal position of the hanger beam 51 to ensure that the steel box girder section is lifted horizontally and uniform force is guaranteed; during the winding process of the wire rope, the load-bearing beam 11 is reasonably stressed by riding on the guide wheel 44, and the wire rope deflection angle is reduced by the movable guide wheel 46.

[0072] In step S4, when the steel box girder section is hoisted to the bridge deck position, the steel box girder section is first made flush with the surface height of the installed beam section, and then the longitudinal position and transverse position of the steel box girder section are adjusted by the sliding crane to slowly approach and align the steel box girder section with the installed beam section. When the sliding crane moves longitudinally and transversely, fine-tuning is repeated until the hoisted steel box girder section is aligned with the installed beam section.

[0073] The above embodiments do not impose any formal limitations on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. A new type of bridge deck lifting device, including a main truss, a lifting system and a traveling system, characterized in that: The main truss includes two diamond trusses arranged opposite to each other, a connecting rod is horizontally fixed between the diamond trusses, and each diamond truss includes a load-bearing beam, a lower cross bar, a rear diagonal bar, a vertical bar and a front diagonal bar; Each diamond truss corresponds to a group of lifting systems, and the lifting system includes a wire rope winding system, a sliding trolley and a balance beam sling. The sliding trolley is arranged on the load-bearing beam, and the sliding trolley includes a longitudinal movement base and a transverse movement base. A push-pull oil cylinder is installed between the longitudinal movement base and the load-bearing beam, and a longitudinal movement slide is fixed at the bottom of the longitudinal movement base, and a longitudinal movement slide is fixed on the load-bearing beam along its length direction, and the longitudinal movement slide is slidably connected to the longitudinal movement slide rail; the transverse movement base is symmetrically arranged with two, and a transverse movement oil cylinder is arranged between the two transverse movement bases, and the cylinder barrel of the transverse movement oil cylinder is fixed in the middle of the longitudinal movement base, and the two piston rods of the transverse movement oil cylinder are respectively hinged to the two transverse movement bases, and a transverse movement slide is fixed on the longitudinal movement base, and a transverse movement slide is fixed at the bottom of the transverse movement base, and the transverse movement slide is slidably connected to the transverse movement slide rail, and the extension direction of the transverse movement slide is perpendicular to the extension direction of the longitudinal movement slide; a longitudinal movement counter-hook cooperating with the load-bearing beam is fixed at the bottom of the longitudinal movement base, and a transverse movement counter-hook cooperating with the longitudinal movement base is fixed at the bottom of the transverse movement base; The wire rope winding system includes a winch, a fixed pulley block, a movable pulley block, a straddling guide wheel and a traveling guide wheel. The winch is arranged at the end of the lower cross bar away from the balance beam sling. Two fixed pulley blocks are arranged and are respectively installed on two transverse displacement bases. The two fixed pulley blocks are respectively located on both sides of the load-bearing beam. The straddling guide wheel is installed on the longitudinal displacement slide and is located between the two fixed pulley blocks. The axis direction of the straddling guide wheel is perpendicular to the axis direction of the fixed pulley block. A support frame is installed at the end of the load-bearing beam close to the winch, and a cruise ship shaft is fixed on the support frame. The traveling guide wheel is sleeved on the cruise ship shaft. The traveling guide wheel is slidably connected to the cruise ship shaft, and the axis of the cruise ship shaft is parallel to the axis of the fixed pulley block. The balancing beam sling comprises a sling beam, a lifting connection assembly with an adjustable center of gravity is installed in the middle of the sling beam, the lifting connection assembly comprises a hanging plate, a connecting plate, a sling cylinder, an adjusting screw and a movable nut. The hanging plates are provided with two and are symmetrically arranged at the front and rear sides of the sling beam, the movable pulley group is rotatably connected between the two hanging plates, the connecting plates are at least provided with two and are respectively located at the upper and lower sides of the sling beam, the connecting plates are fixedly connected between the two hanging plates, the cylinder barrel of the sling cylinder is hinged to the sling beam, the piston rod of the sling cylinder is hinged to one of the connecting plates, the adjusting screw is slidably connected to the other connecting plate, the two ends of the adjusting screw pass through the connecting plate and are fixedly connected to the sling beam, at least two movable nuts are threadedly connected to the adjusting screw, and the movable nuts are respectively located at the two sides of the connecting plate, the axis of the piston rod of the sling cylinder and the axis of the adjusting screw are parallel to the length extension direction of the sling beam; the two ends of the sling beam are symmetrically installed with connecting rigging for lifting the suspended object.

2. A novel bridge deck lifting device according to claim 1, characterized in that: A wing beam is fixed on each side of each load-bearing beam. The wing beam is arranged parallel to the load-bearing beam. A secondary slide rail is fixed on the wing beam along its length direction. A secondary slide seat is fixed at the bottom of the longitudinal movement base. The secondary slide seat is slidably connected to the secondary slide rail. The length of the wing beam is greater than the longitudinal movement stroke of the sliding overhead crane.

3. A new type of bridge deck lifting device according to claim 2, characterized in that: A sliding guide wheel and a rope tail weight sensor are respectively arranged on both sides of each load-bearing beam. The wire rope wound by the winch is turned by the sliding guide wheel and then connected to the movable pulley group and the fixed pulley group in sequence. The sliding guide wheel and the rope tail weight sensor are respectively connected with a hanger, which is slidably connected to the wing beam. The hanger is detachably connected to the bottom of the longitudinal movement base through a connecting rod. Positioning holes are evenly spaced on the wing beam along its length direction, and a positioning pin shaft that can pass through the slide groove is installed on the hanger.

4. A novel bridge deck lifting device according to claim 1, characterized in that: The connecting rigging includes a shoulder pole beam and a flexible sling. The shoulder pole beam is horizontally fixed at the end of the sling beam. The axis of the shoulder pole beam is perpendicular to the length extension direction of the sling beam. A group of limiting components are respectively arranged at both ends of the shoulder pole beam. A group of limiting components includes at least two sling limit plates fixedly connected to the shoulder pole beam. After the flexible sling passes around the pulley and the shoulder pole beam on the suspended object, the two ends of the flexible sling are respectively connected to the sling limit plates through shackles.

5. A new type of bridge deck lifting device according to claim 1, characterized in that: The traveling system includes a whole machine longitudinal track and a crane transverse movement mechanism. The whole machine longitudinal track is arranged in parallel below the lower cross bar. The lower cross bar is slidably connected to the whole machine longitudinal track, and a whole machine anti-hook is arranged between the lower cross bar and the whole machine longitudinal track. The crane transverse movement mechanism includes a crane cylinder, a transverse movement slide plate and a lifting cylinder. One end of the lifting cylinder is fixed to the lower end of the lower cross bar. The axis of the crane cylinder is perpendicular to the length extension direction of the lower cross bar. The cylinder barrel of the crane cylinder is fixed on the open space on one side of the whole machine longitudinal track, and the piston rod of the crane cylinder faces the side of the whole machine longitudinal track.

6. A novel bridge deck lifting device according to claim 1, characterized in that: The upright poles of the diamond truss are arranged vertically on the diagonal lines of the diamond truss, and the load-bearing beam is arranged to be suspended beyond the end surface of the installed steel main beam.

7. A method for using a novel bridge deck lifting device, comprising the novel bridge deck lifting device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1, preparation work before hoisting: installation and inspection of the crane; Step S2, the beam transport ship is in place, and the wire rope winding system lowers the balance beam hoist to the top of the steel box beam section to be hoisted; Step S3, flexibly connecting the balance beam sling to the steel box beam section to be hoisted through the connecting rigging; after the balance beam sling is connected, slowly tighten the wire rope to make each hoisting point evenly stressed; Step S4, check the stress condition of the lifting point, ensure that the stress is balanced, and then gradually increase the force to lift until it reaches the bridge deck position for matching.

8. The method for using the novel bridge deck lifting device according to claim 7 is characterized in that: In step S3, if the steel box girder section is not horizontal, the lifting point position is adjusted by moving the movable pulley group on the balance beam hoist relative to the horizontal position of the hoist beam to ensure that the steel box girder section is lifted horizontally and uniform force is applied; during the winding process of the wire rope, the load-bearing beam is subjected to reasonable force by riding on the guide wheel, and the wire rope deflection angle is reduced by the movable guide wheel.

9. The method for using the novel bridge deck lifting device according to claim 7 is characterized by: In step S4, when the steel box girder section is hoisted to the bridge deck position, the steel box girder section is first made flush with the surface height of the installed beam section, and then the longitudinal position and transverse position of the steel box girder section are adjusted by the sliding crane to slowly approach and align the steel box girder section with the installed beam section. When the sliding crane moves longitudinally and transversely, fine-tuning is repeated until the hoisted steel box girder section is aligned with the installed beam section.

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