Auxiliary hoisting equipment and hoisting method for prefabricated box girder

Abstract

The invention provides auxiliary hoisting equipment and a hoisting method for a prefabricated box girder, relates to an auxiliary hoisting technology for the prefabricated box girder, and particularly discloses a suspension bracket suspended on a girder of a bridge girder erection machine, hoisting equipment is mounted at the top of the suspension bracket, and a suspension bracket main body is mounted in the suspension bracket; a guide mechanism used for guiding the hanging bracket body to move in the vertical direction is installed in the hanging bracket, the lifting end of the lifting device is detachably connected with the hanging bracket body, two clamping mechanisms used for clamping the precast beam are installed on the hanging bracket body, and two adjusting mechanisms used for adjusting the transverse movement of the clamping mechanisms are installed on the hanging bracket body. The guiding mechanism can ensure that the precast beam does not generate large-amplitude deflection in the lowering process, the adjusting mechanism allows the precast beam to move in the width direction of the precast beam when the precast beam is hung, the deflection mechanism enables the adjusting hanging seat to deflect relative to the hanging bracket body, and the installation angle of the precast beam is changed. And the precast beam can adapt to the mounting environment at the small curvature radius.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary hoisting of prefabricated box girders, and in particular to auxiliary hoisting equipment and a hoisting method for prefabricated box girders. Background Art

[0002] Precast concrete beams are a type of beam used in bridge construction. They are hollow inside and have flanges on both sides of the upper part. When hoisting precast concrete beams, they are usually lifted using lifting equipment because they are large and difficult to fix. In the early days, they were tied together with wire ropes and then lifted using lifting equipment. However, this lifting method requires that there must be a gap between the precast concrete beams and the ground that is large enough for the wire ropes to pass through. Otherwise, tying the precast concrete beams is very difficult to achieve. In addition, the precast concrete beams will inevitably shake during the lifting process, and the wire ropes and the precast concrete beams will squeeze, slide, and misalign with each other. The contact area between the wire ropes and the precast concrete beams is small, and the pressure is too concentrated, which can easily cause damage to the precast concrete beams or wear off the wire rope strands, thereby posing a safety hazard. Currently, the precast concrete beams are lifted by connecting the slings to the upper surface of the precast concrete beams and then using rope-type lifting equipment.

[0003] When the precast beam is lifted in the above manner, no matter whether the precast beam is lifted by a wire rope or a sling, it is actually lifted by a multi-strand traction rope under the lifting of the overhead crane lifting mechanism. During the lifting process, the precast beam is easily affected by external factors in mid-air and its position may be shifted horizontally or vertically. At the same time, the precast beam is large in size, making it difficult to keep it in a relatively static state, resulting in the operation of aligning and placing the shaking precast beam with the installation position on the cap beam. It is difficult to accurately place the two ends of the precast beam on the supporting structure, resulting in deviation in the position of the precast beam after installation. Moreover, when the precast beam is installed at a small curvature radius, it is particularly difficult to adjust the deflection angle of the two ends of the precast beam, and additional temporary support needs to be built. After the precast beam is temporarily installed, other mechanical equipment is required to make additional adjustments to its installation position, which delays the installation time of the precast beam. Summary of the Invention

[0004] The purpose of the present invention is to provide an auxiliary lifting device and lifting method for prefabricated box beams. In view of the shortcomings of the existing technology, it can solve the problem that the deflection angles at both ends of the prefabricated beams are difficult to adjust when the prefabricated beams are installed at a small curvature radius.

[0005] The technical solution of the present invention is achieved like this: The invention provides an auxiliary lifting device for prefabricated box girders, comprising a suspension frame suspended on the main beam of a bridge erection machine, a lifting device installed on the top of the suspension frame, a hanger body installed in the suspension frame, a guide mechanism for guiding the hanger body to move in a vertical direction installed in the suspension frame, the lifting end of the lifting device is detachably connected to the hanger body, two groups of clamping mechanisms for clamping prefabricated beams are installed on the hanger body, and two groups of adjustment mechanisms for adjusting the lateral movement of the clamping mechanisms are installed on the hanger body.

[0006] In some technical solutions of the present invention, the guide mechanism includes several guide frames installed on the suspension frame, the guide frames and the suspension frame are perpendicular to each other, guide grooves are opened on the side walls of the guide frames in the vertical direction, and guide columns adapted to the guide grooves are installed on the outer side walls of the suspension frame body.

[0007] In some technical solutions of the present invention, the clamping mechanism includes a hanging seat, mounting openings are opened on both sides of the hanging seat, and adjustment beams are slidably provided in the mounting openings. A second hanging arm is installed on the free end of the adjusting beam, a first hanging arm is installed on the free end of the second hanging arm, a top plate is installed on the free end of the first hanging arm, and an adjusting member for driving the first hanging arm to rotate is installed on the second hanging arm. The adjusting mechanism is installed in the hanging seat, and the adjusting mechanism is used to adjust the two adjusting beams to move synchronously along the extension direction of the hanging seat.

[0008] In some technical solutions of the present invention, the adjustment mechanism includes a trough provided in the hanging seat, a through groove connected to the trough is provided on the bottom of the trough, an adjustment seat is slidably provided in the through groove, connecting rods connected to the adjustment beam are installed on both sides of the adjustment seat, a driven wheel is rotatably provided on one side of the trough, and a driving wheel is rotatably provided on the other side of the trough, an installation groove is provided on the side wall of the adjustment seat, two adjusting wheels are rotatably provided in the installation groove, a chain structure is provided between the driving wheel and the driven wheel, and the two free ends of the chain structure are respectively wound around the two adjusting wheels and then fixed on the inner wall of the trough, a driving motor connected to the driving wheel is installed in the trough, and the hanging seat is rotatably provided on the side wall of the hanger body.

[0009] In some technical solutions of the present invention, the hanger body includes two hangers arranged in pairs, the guide column is installed on the hanger, two first main beams are installed between the two hangers, and the first main beams are provided with a deflection mechanism for adjusting the deflection movement of the hanger relative to the first main beam.

[0010] In some technical solutions of the present invention, the deflection mechanism includes a rotating seat rotatably arranged in the first main beam, a mounting seat connected to the suspension seat is installed on the rotating seat, two second push rods are staggeredly installed on the side wall of the first main beam with the rotating seat as the axis of symmetry, and the telescopic end of the second push rod is hinged to the rotating seat.

[0011] In some technical solutions of the present invention, the adjusting member is a first push rod, the body of the first push rod is rotatably connected to the second boom, and the telescopic end of the first push rod is rotatably connected to the first boom.

[0012] In some technical solutions of the present invention, a connecting seat rotatably connected to the first boom is installed on the top plate.

[0013] In some technical solutions of the present invention, a track is installed on the main beam of the bridge-building machine, and a pulley structure adapted to the track is installed at the end of the suspension frame.

[0014] A method for hoisting a prefabricated box girder comprises the following steps: First, hang the hanger on the main beam of the bridge erection machine, and use the lifting equipment on the hanger to lower the clamping mechanism installed on the hanger body to the prefabricated beam and clamp the prefabricated beam; The lifting equipment lifts the precast beam and moves it upward in the vertical direction under the guidance of the guide mechanism; After the precast beam reaches the installation position, the deflection mechanism on the first main beam is used to deflect the adjustment hanger relative to the first main beam to change the installation angle of the precast beam. At the same time, the adjustment mechanism moves the precast beam along the width direction of the precast beam when it is suspended, so that the installation area of ​​the precast beam and the cap beam are aligned. Subsequently, the lifting equipment moves downward in the vertical direction under the guidance of the guide mechanism, lifting the precast beam for installation.

[0015] Compared with the prior art, the present invention has at least the following advantages or beneficial effects: the guide mechanism guides the hanger body to move in the vertical direction, ensuring that the precast beam does not deflect significantly during the lowering process, and keeping the relative positions of the head and tail ends constant; the adjustment mechanism allows the precast beam to move along the width direction of the precast beam when suspended, so that the precast beam can be installed after being aligned with the installation area of ​​the cap beam, reducing the difficulty of assembly and improving the assembly accuracy; the adjustment beam cooperates with the second boom, and the first push rod pushes the first boom closer to the precast beam until the top plate abuts the precast beam, ensuring the clamping effect; the deflection mechanism on the first main beam causes the adjustment hanger to deflect relative to the first main beam, changing the installation angle of the precast beam, adapting to the installation environment of the precast beam at a small curvature radius, and improving the assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the installation structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the installation structure of the hanger and the hanger body in the present invention.

[0018] Figure 3 It is a schematic diagram of the installation structure of the hanger body and the prefabricated beam in the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping mechanism in the present invention.

[0020] Figure 5 It is a schematic cross-sectional structural diagram of the clamping mechanism in the present invention.

[0021] Figure 6 It is a schematic diagram of the installation structure of the adjustment mechanism in the present invention.

[0022] Figure 7 Schematic diagram of the installation structure of the deflection mechanism in the present invention.

[0023] Figure markings: 1. main beam of the bridge-building machine; 2. track; 3. suspension frame; 4. guide frame; 5. prefabricated beam; 6. hanger body; 7. guide groove; 8. guide column; 9. first main beam; 10. top plate; 11. first boom; 12. hanger seat; 13. adjusting beam; 14. adjusting seat; 15. second boom; 16. rotating seat; 17. mounting seat; 18. groove; 19. first push rod; 20. connecting seat; 21. chain structure; 22. driving wheel; 23. driven wheel; 24. adjusting wheel; 25. mounting groove; 26. second push rod; 27. adjusting groove; 28. connecting rod; 29. ​​displacement seat. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0026] Example The present invention provides an auxiliary lifting device for prefabricated box beams, such as Figure 1-Figure 7As shown, the hanger 3 is suspended on the main beam 1 of the bridge erection machine. The hanger 3 is a rectangular frame structure. During actual installation, the hanger 3 is suspended on the top of the main beam 1 of the bridge erection machine. The two can be detachably connected by bolts to prevent the hanger 3 from shifting laterally on the main beam 1 of the bridge erection machine when hoisting the precast beam 5, thereby ensuring the hoisting accuracy of the precast beam 5. A lifting device is installed on the top of the hanger 3. The lifting device is a lifting trolley in the crane hoisting mechanism or a lifting structure in the bridge erection machine. The above technology is conventional technology and can lift large precast beam structures. A hanger body 6 is installed in the suspension frame 3. The hanger body 6 includes two hangers arranged in pairs. The hanger is a cage frame structure, which can increase the load-bearing capacity of the hanger body 6. Two first main beams 9 are fixedly connected between the two hangers by bolt connection, and reinforcing beams are connected at both ends of the two hangers to enhance the connection strength between the two. The reinforcing beams are welded to the two hangers. Two lifting hooks are provided on the two hangers for fixing the lifting ends of the lifting equipment on the hanger body 6 at equal distances, ensuring that the lifting force of the lifting equipment of the above structure during the lifting process is equally divided on the two hangers, so that the pulling force of the lifting equipment on the hanger body remains balanced, preventing the hanger body 6 from deformation. A guide mechanism is installed within the hanger 3. This guide mechanism guides the hanger body 6 in vertical movement toward or away from the hanger 3 under the traction of the lifting equipment. This ensures that the precast beam 5 does not deflect significantly in mid-air during lowering, ensuring that the relative positions of the precast beam's ends remain constant. This reduces the difficulty of installing the precast beam in the cap beam installation area. The hanger body 6 is equipped with two sets of clamping mechanisms, each for clamping the precast beam 5 at its ends, making it suitable for longer precast beams 5. The hanger body 6 also has two adjustment mechanisms for adjusting the lateral movement of the clamping mechanisms. These adjustment mechanisms allow the ends of the precast beam 5 to be shifted a certain distance left or right along its width while suspended in mid-air, aligning them mid-air with the cap beam installation area before installation. This reduces the difficulty of assembling the ends of the precast beam 5 with the support structure within the end cap, simplifies the adjustment process, and improves the assembly accuracy of both.

[0027] Preferably, the lifting end of the lifting device is detachably connected to the hanger body 6 via a hook or a U-shaped fixing piece, which is convenient for later disassembly and maintenance.

[0028] In some technical solutions of the present invention, the guiding mechanism includes four guiding frames 4. The guiding frame 4 is a "C"-shaped section steel, and the guiding frame 4 is welded to the suspension frame 3, and the guiding frame 4 and the suspension frame 3 are perpendicular to each other. A guiding groove 7 is vertically formed on the side wall of the guiding frame 4. The guiding groove 7 is actually the concave area of the "C"-shaped section steel. A guiding column 8 adapted to the guiding groove 7 is installed on the outer side wall of the hanger body 6. The guiding column 8 is installed on the side wall of the hanger by welding, and the cross section of the guiding column 8 is rectangular. In order to reduce the wear of the guiding column 8 in the guiding groove 7, rubber rollers need to be installed at the end of the guiding column 8 by bolts in the later stage to reduce the frictional force when the guiding column 8 contacts the guiding groove 7 and improve the smoothness of the guiding column 8 when running in the guiding groove 7.

[0029] In some technical solutions of the present invention, the clamping mechanism includes a suspension seat 12. Installation openings are formed on both sides of the suspension seat 12, and adjusting beams 13 are slidably arranged in the installation openings. The adjusting beam 13 is in the shape of an I-beam; a limiting block is integrally formed in the installation opening, and a part of the limiting block is embedded in the groove 18 of the adjusting beam 13 to limit the movement direction of the adjusting beam 13. A second lifting arm 15 is installed on the free end of the adjusting beam 13 through a pin shaft, and the second lifting arm 15 can rotate freely on the free end of the adjusting beam 13 through the pin shaft. A first lifting arm 11 is installed on the free end of the second lifting arm 15 through a pin shaft, and a top plate 10 is installed on the free end of the first lifting arm 11. The top plate 10 is a steel plate, and the top plate 10 can increase the contact area when the first lifting arm 11 contacts the precast beam 5, and prevent the problem that the side integrity of the precast beam 5 is damaged when the first lifting arm 11 lifts the precast beam 5. An adjusting member for driving the first lifting arm 11 to rotate is installed on the second lifting arm 15; an adjusting mechanism is installed in the suspension seat 12, and the adjusting mechanism is used to adjust the synchronous movement of the two adjusting beams 13 along the extending direction of the suspension seat 12.

[0030] Preferably, the top plate 10 is inclined and arranged on the inner side wall of the first lifting arm 11.

[0031] In some technical solutions of the present invention, the adjusting member is a first push rod 19. The body of the first push rod 19 is rotatably connected to the second lifting arm 15, and the telescopic end of the first push rod 19 is rotatably connected to the first lifting arm 11. The first push rod 19 is used to push the first lifting arm 11 to approach the side wall of the precast beam 5 until the top plate 10 abuts against the side wall of the precast beam 5, so as to ensure the clamping effect of the clamping mechanism on the precast beam 5 and prevent the precast beam 5 from falling off the clamping mechanism.

[0032] In some technical solutions of the present invention, a connecting seat 20 rotatably connected to the first lifting arm 11 through a spherical hinge member is installed on the top plate 10. Through the above structure, when the top plate 10 contacts the precast beam, the top plate 10 can quickly adapt to the side walls of precast beams of different models, and improve the assembly efficiency of the two.

[0033] In some technical solutions of the present invention, a track 2 is mounted on the main beam 1 of the bridge erection machine, and a pulley structure adapted to the track 2 is mounted at the end of the hanger 3. This ensures that the hanger 3 can move along the extension direction of the main beam 1 of the bridge erection machine, thereby adjusting the lateral installation position of the precast beam 5 and preventing the precast beam 5 from shaking during lateral movement.

[0034] In some technical solutions of the present invention, a deflection mechanism is provided on the first main beam 9, which enables the adjustment seat 12 to actively deflect relative to the first main beam 9, thereby changing the installation angle when the end of the prefabricated beam 5 falls into the corresponding end cover, reducing the operation difficulty of the operator; when the prefabricated beam 5 is installed at a small curvature radius, the deflection angle of the head end or tail end of the prefabricated beam is adjusted separately by the deflection mechanism, and the head end or tail end of the prefabricated beam 5 is adjusted separately along the width direction of the prefabricated beam by the adjustment mechanism, and then the two ends of the prefabricated beam are aligned with the corresponding cap beam in mid-air in turn before being installed; thereby reducing the difficulty of assembling the head end and tail end of the prefabricated beam 5 with the supporting structure in the corresponding end cover, the adjustment process is changed from complex to simple, and the assembly accuracy of the two is improved, thereby improving the installation accuracy of the prefabricated beam 5.

[0035] In some technical solutions of the present invention, the deflection mechanism includes a rotating seat 16 rotatably arranged in the first main beam 9, the rotating seat 16 and the mounting seat 17 are integrally formed, and the mounting seat 17 is detachably connected to the hanger 12 by bolts. Two second push rods 26 are staggeredly installed on the side wall of the first main beam 9 with the rotating seat 16 as the axis of symmetry. The second push rods 26 are respectively located on both sides of the rotating seat 16, and the telescopic ends of the second push rods 26 are hinged to the rotating seat 16, and the body of the second push rods 26 is hinged to the first main beam 9; when the telescopic ends of the two second push rods 26 move out of the body of the second push rods 26, both sides of the rotating seat 16 are subjected to a thrust, and at this time the rotating seat 16 will perform a quasi-circular motion on the first main beam 9, thereby changing the relative position of the clamping mechanism on the first main beam 9, so that the head end or tail end of the prefabricated beam 5 can rotate on the hanger body 6, thereby changing the installation angle of the prefabricated beam and the corresponding cap beam, which is convenient for installing the prefabricated beam on the cap beam.

[0036] Preferably, an adjustment slot 27 is provided on the first main beam 9. A displacement seat 29 is slidably mounted within the adjustment slot 27. The displacement seat 29 has a rectangular cross-section and a rotation hole adapted for the rotation seat 16. Furthermore, a third push rod is mounted within the adjustment slot. This third push rod is hydraulic, with its telescopic end connected to the outer wall of the displacement seat 29. This push rod is used to move the clamping mechanism on the first main beam 9 along its extension direction, thereby enhancing the aforementioned structure's ability to adjust the width of the precast beam 5.

[0037] In some technical solutions of the present invention, the adjustment mechanism includes a sink groove provided in the hanging seat 12, and a through groove connected to the sink groove is provided on the bottom of the sink groove. The cross-section of the through groove is rectangular, and an adjustment seat 14 is slidably provided in the through groove. Connecting rods 28 connected to the adjustment beam 13 are installed on both sides of the adjustment seat 14. A driven wheel 23 is provided on one side of the sink groove through a pin shaft, and a driving wheel 22 is provided on the other side of the sink groove through a pin shaft. A mounting groove 25 is provided on the side wall of the adjusting seat 14, and two adjusting wheels 24 are provided in the mounting groove 25 through a pin shaft. A chain structure 21 is provided between the driving wheel 22 and the driven wheel 23. The two free ends of the chain structure 21 are respectively wound around the two adjusting wheels 24 and then fixed on the inner wall of the sink groove. A driving motor connected to the driving wheel 22 is installed in the sink groove, and the hanging seat 12 is rotatably provided on the side wall of the hanger body 6.

[0038] The working principle of the adjustment mechanism is as follows: when the driving motor drives the active wheel 22 to rotate clockwise, the adjusting wheel 24 and the chain structure 21 are transmitted through friction, and at the same time, the chain structure 21 located on the right side of the adjusting seat 14 will gradually become shorter; at this time, the chain structure 21 will pull the adjusting seat 14 to move horizontally to the right in the hanging seat 12; similarly, when the driving motor drives the active wheel 22 to rotate counterclockwise, the chain structure 21 located on the right side of the adjusting seat 14 will gradually become longer; at this time, the chain structure 21 will pull the adjusting seat 14 to move horizontally to the left in the hanging seat 12; through the above structure, the head end or tail end of the prefabricated beam 5 can be adjusted along the width direction of the prefabricated beam, so that the two ends of the prefabricated beam are aligned with the corresponding cap beam in mid-air in turn and then installed; thereby reducing the difficulty of assembling the head end and tail end of the prefabricated beam 5 with the supporting structure in the corresponding end cap, and the adjustment process is changed from complex to simple, and the assembly accuracy of the two is improved, thereby improving the installation accuracy of the prefabricated beam 5.

[0039] Hoisting method of prefabricated box girder: First, hang the hanger 3 on the main beam 1 of the bridge erection machine, and use the lifting equipment on the hanger 3 to lower the clamping mechanism installed on the hanger body 6 to the prefabricated beam 5 and clamp the prefabricated beam 5; The lifting equipment lifts the precast beam 5 and moves it upward in the vertical direction under the guidance of the guide mechanism; After the precast beam 5 reaches the installation position, the deflection mechanism on the first main beam 9 is used to deflect the adjustment hanger 12 relative to the first main beam 9 to change the installation angle of the precast beam 5. At the same time, the adjustment mechanism causes the precast beam 5 to move along the width direction of the precast beam 5 when hanging, so that the precast beam 5 is aligned with the installation area of ​​the cap beam. Subsequently, the lifting device moves downward in the vertical direction under the guidance of the guide mechanism to lift the precast beam 5 for installation.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An auxiliary lifting device for prefabricated box beams, characterized in that: The invention comprises a suspension frame (3) suspended on a main beam (1) of a bridge erecting machine, a lifting device is installed on the top of the suspension frame (3), a hanger body (6) is installed in the suspension frame (3), a guide mechanism for guiding the hanger body (6) to move in a vertical direction is installed in the suspension frame (3), a lifting end of the lifting device is detachably connected to the hanger body (6), two groups of clamping mechanisms for clamping prefabricated beams (5) are installed on the hanger body (6), and two groups of adjustment mechanisms for adjusting the lateral movement of the clamping mechanisms are installed on the hanger body (6).

2. The auxiliary hoisting equipment for prefabricated box beams according to claim 1, characterized in that: The guide mechanism comprises a plurality of guide frames (4) mounted on the suspension frame (3), the guide frames (4) and the suspension frame (3) being perpendicular to each other, a guide groove (7) being provided on the side wall of the guide frame (4) in a vertical direction, and a guide column (8) adapted to the guide groove (7) being mounted on the outer side wall of the suspension frame body (6).

3. The auxiliary hoisting equipment for prefabricated box beams according to claim 2, characterized in that: The clamping mechanism comprises a suspension seat (12), both sides of which are provided with mounting openings, and adjustment beams (13) are slidably arranged in the mounting openings, a second suspension arm (15) is mounted on the free end of the adjustment beam (13), a first suspension arm (11) is mounted on the free end of the second suspension arm (15), a top plate (10) is mounted on the free end of the first suspension arm (11), an adjustment member for driving the first suspension arm (11) to rotate is mounted on the second suspension arm (15), and the adjustment mechanism is mounted in the suspension seat (12), and is used to adjust the two adjustment beams (13) to move synchronously along the extension direction of the suspension seat (12).

4. The auxiliary hoisting equipment for prefabricated box beams according to claim 3, characterized in that: The adjustment mechanism comprises a sink groove provided in the hanging seat (12), a through groove in communication with the sink groove provided on the bottom of the sink groove, an adjustment seat (14) slidably provided in the through groove, connecting rods (28) connected to the adjustment beam (13) are installed on both sides of the adjustment seat (14), a driven wheel (23) is rotatably provided on one side of the sink groove, and a driving wheel (22) is rotatably provided on the other side of the sink groove, a mounting groove (25) is provided on the side wall of the adjustment seat (14), two adjustment wheels (24) are rotatably provided in the mounting groove (25), a chain structure (21) is provided between the driving wheel (22) and the driven wheel (23), two free ends of the chain structure (21) are respectively wound around the two adjustment wheels (24) and then fixed to the inner wall of the sink groove, a driving motor drivingly connected to the driving wheel (22) is installed in the sink groove, and the hanging seat (12) is rotatably provided on the side wall of the hanger body (6).

5. The auxiliary hoisting equipment for prefabricated box beams according to claim 3, characterized in that: The hanger body (6) comprises two hangers arranged in pairs, the guide column (8) is mounted on the hangers, two first main beams (9) are mounted between the two hangers, and the first main beams (9) are provided with a deflection mechanism for adjusting the deflection movement of the hanger seat (12) relative to the first main beams (9).

6. The auxiliary hoisting equipment for prefabricated box beams according to claim 5, characterized in that: The deflection mechanism comprises a rotating seat (16) rotatably arranged in the first main beam (9), a mounting seat (17) connected to the suspension seat (12) being mounted on the rotating seat (16), two second push rods (26) being staggeredly mounted on the side wall of the first main beam (9) with the rotating seat (16) as a symmetry axis, and a telescopic end of the second push rod (26) being hinged to the rotating seat (16).

7. The auxiliary hoisting equipment for prefabricated box beams according to claim 3, characterized in that: The adjusting member is a first push rod (19), a body of the first push rod (19) is rotatably connected to the second suspension arm (15), and a telescopic end of the first push rod (19) is rotatably connected to the first suspension arm (11).

8. The auxiliary hoisting equipment for prefabricated box beams according to claim 3, characterized in that: A connecting seat (20) rotatably connected to the first suspension arm (11) is mounted on the top plate (10).

9. The auxiliary hoisting equipment for prefabricated box beams according to claim 1, characterized in that: A track (2) is installed on the main beam (1) of the bridge erecting machine, and a pulley structure adapted to the track (2) is installed at the end of the suspension frame (3).

10. A method for hoisting a prefabricated box beam, comprising the auxiliary hoisting device for a prefabricated box beam according to any one of claims 1 to 9, characterized in that: The following steps are involved: First, the suspension frame (3) is hung on the main beam (1) of the bridge erection machine, and the clamping mechanism installed on the suspension frame body (6) is lowered to the prefabricated beam (5) by the lifting equipment on the suspension frame (3), and the prefabricated beam (5) is clamped; The lifting device lifts the prefabricated beam (5) so that it moves upward in a vertical direction under the guidance of the guide mechanism; After the precast beam (5) reaches the installation position, the deflection mechanism on the first main beam (9) is used to cause the adjustment hanger (12) to deflect relative to the first main beam (9) to change the installation angle of the precast beam (5); at the same time, the adjustment mechanism causes the precast beam (5) to move along the width direction of the precast beam (5) when suspended, so that the precast beam (5) is aligned with the installation area of ​​the cap beam; Subsequently, the lifting device moves downward in the vertical direction under the guidance of the guide mechanism to lift the prefabricated beam (5) for installation.

Images