Longitudinal slope adjusting equipment for hoisting steel box girder and fixing clamp device

Abstract

The invention discloses longitudinal slope adjusting equipment for hoisting a steel box girder and a fixing clamp device, and relates to the technical field of constructional engineering, the longitudinal slope adjusting equipment comprises a hanging basket which is fixed on a concrete section bridge surface and is used for hoisting a steel box girder body, and a mounting top seat is fixed on the upper end surface of the hanging basket; a pair of first steel strand sets and a pair of second steel strand sets are movably arranged on the upper end face of the mounting top base in a penetrating mode, the lower ends of the two first steel strand sets are provided with a first hoisting connecting assembly, and the lower ends of the two second steel strand sets are provided with a second hoisting connecting assembly. A first lifting driving assembly used in cooperation with the first steel strand set and a second lifting driving assembly used in cooperation with the second steel strand set are arranged on the upper end face of the mounting top base. During use, through cooperation of the pair of first steel strand sets and the pair of second steel strand sets, hoisting and angle adjustment of the steel box girder body are achieved, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a longitudinal slope adjusting device and a fixing clamp device for hoisting a steel box girder. Background Art

[0002] According to the patent with application announcement number CN220078321 U, a steel box girder lifting device is disclosed, including: a vertical lifting device, a lifting plate, a first lifting column and a second lifting column, the output end of the vertical lifting device can move in the vertical direction and maintain the position after the movement; the lifting plate is horizontally arranged and fixedly connected to the output end of the height lifting device; the top of the first lifting column is slidably connected to the lifting plate and can maintain the position after sliding, and the other end is used for being detachably fixedly connected to the first end of the steel box girder; the top of the second lifting column is slidably connected to the lifting plate and can maintain the position after sliding, and the other end is used for being detachably fixedly connected to the second end of the steel box girder, which can lift steel box girders of different spans and effectively improve work efficiency.

[0003] The above-mentioned steel box girder lifting device has certain defects during use. For example, when constructing a cross-river bridge, when the concrete segment part located on the shore is hoisted and combined with the steel box girder, it may be necessary to adjust the longitudinal angle of the steel box girder so that the longitudinal slope of the steel box girder matches the longitudinal slope of the concrete segment part. However, when using the steel box girder lifting device, it is not convenient to adjust the angle of the steel box girder, and the operation is troublesome. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art:

[0005] The existing steel box girder hoisting device is not convenient for adjusting the angle of the steel box girder and is troublesome to operate.

[0006] A longitudinal slope adjustment device and a fixing clamp device for steel box girder hoisting are proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A longitudinal slope adjustment device for lifting a steel box girder comprises a hanging basket fixed on a concrete segment bridge deck for lifting a steel box girder body, a mounting top seat being fixed on the upper end surface of the hanging basket, a pair of steel strand groups 1 and a pair of steel strand groups 2 being movably penetrated through the upper end surface of the mounting top seat, a same lifting connection component 1 being provided at the lower ends of the two steel strand groups 1, a same lifting connection component 2 being provided at the lower ends of the two steel strand groups 2, a lifting drive component 1 used in conjunction with the steel strand group 1 and a lifting drive component 2 used in conjunction with the steel strand group 2 being provided on the upper end surface of the mounting top seat.

[0009] As a further technical solution of the present invention, the lifting connection assembly includes two connecting frames, each of which is hinged to the upper end surface of the steel box girder body, and the same connecting arm is fixed to the inner top of the two connecting frames, and a connecting unit is arranged between the lower end of each steel strand group and the connecting arm.

[0010] As a further technical solution of the present invention, each of the connecting units includes an articulated seat fixed to the upper end surface of a connecting arm, a U-shaped articulated frame is fixed to the lower end of each steel strand group, and a latch column for cooperating with the articulated seat is detachably provided on the side wall of the U-shaped articulated frame.

[0011] As a further technical solution of the present invention, the lifting connection assembly 2 includes two connecting frames 2, each of which is hinged to the upper end surface of the steel box girder body, and the upper end surfaces of the two connecting frames 2 are fixed with the same connecting arm 2, and a connecting unit 2 is arranged between the lower end of each steel strand group 2 and the connecting arm 2.

[0012] As a further technical solution of the present invention, each of the two connecting units includes two hinged seats fixed to the upper end surface of the two connecting arms, and a U-shaped hinged frame two is fixed to the lower end of each two steel strand groups, and two latch columns used in conjunction with the two hinged seats are detachably provided on the side walls of the two U-shaped hinged frames.

[0013] As a further technical solution of the present invention, two outer tubes are symmetrically fixed on the lower end surface of the mounting top seat, and an inner tube is movably provided at the lower end of each outer tube, and the upper end of the inner tube is movably penetrated into the outer tube, and a limiting unit is provided in the outer tube for use with the inner tube, and a connecting sleeve is fixed at the lower end of each inner tube, and a circular arc chamfer is provided on the inner wall of each connecting sleeve near the lower end, and a fixing seat for use with the outer tube is fixedly provided on the lower end surface of the mounting top seat, and the outer tube is fixedly penetrated through the fixing seat.

[0014] As a further technical solution of the present invention, a limiting ring groove is provided in each of the inner tubes, a limiting ring block is slidably arranged in each of the limiting ring grooves, and the upper end of each inner tube is movable through the limiting ring groove and fixedly connected to the lower end of the limiting ring block.

[0015] As a further technical solution of the present invention, each of the connecting sleeves is provided with an annular inner cavity, a plurality of oil leakage holes are provided on the inner wall of the connecting sleeve, a plurality of large balls are movably arranged in the annular inner cavity for use with the oil leakage holes, a plurality of resistance units are arranged in the annular inner cavity for use with the corresponding large balls, an oil filling hole is provided on the upper end surface of the connecting sleeve, and a sealing plug is arranged in the oil filling hole.

[0016] As a further technical solution of the present invention, each of the resistance units includes a special-shaped resistance block movably arranged on one side of the large ball, a rotating groove is provided on the side of the special-shaped resistance block close to the large ball, a plurality of small balls are rotatably arranged on the inner wall of the rotating groove, the small balls resist the surface of the large ball, a telescopic rod and a spring are fixed between the special-shaped resistance block and the annular inner cavity, and the spring is movably sleeved on the outer surface of the telescopic rod.

[0017] A fixing clamp device for lifting a steel box girder comprises four pairs of U-shaped parts, each pair of the U-shaped parts is fixedly sleeved on the outer surface of the two ends of the corresponding latch columns, two locking bolts are symmetrically arranged between each pair of U-shaped parts, and each locking bolt is threadedly connected with a locking nut.

[0018] Beneficial effects of the present invention:

[0019] 1. When hoisting the steel box girder body, install the hoisting connection component 1 near the middle position of the upper end surface of the steel box girder body, and install the hoisting connection component 2 near the end position of the upper end surface of the steel box girder body. Then, lift the steel strand group 1 and the steel strand group 2 by lifting the driving component 1 and the driving component 2, so as to lift the steel box girder body upward. When the steel box girder body is lifted to the specified height, if the longitudinal slope of the lifted steel box girder body needs to be adjusted, the lifting driving component 2 first suspends the lifting of the steel strand group 2, and the lifting driving component 1 continues to lift the steel strand group 1. At this time, the steel box girder body will deflect slightly, so as to adjust its longitudinal slope so that it can match the longitudinal slope of the concrete segment bridge deck, which is easy to operate.

[0020] 2. Each steel strand group 1 passes through the center of the corresponding outer tube, inner tube and connecting sleeve. In the initial state, the outer surface of the steel strand group 1 does not contact the inner walls of the outer tube, inner tube and connecting sleeve. When the steel strand group 1 cooperates with the steel strand group 2 to hoist the steel box girder body, if the steel strand group 1 and the steel box girder body shake, the steel strand group 1 will contact the inner wall of the connecting sleeve during the shaking process, limiting the swing stroke of the steel strand group 1, thereby reducing the shaking amplitude of the steel strand group 1 and the steel box girder body.

[0021] 3. When the steel strand group 1 shakes and contacts the inner wall of the connecting sleeve, the steel strand group 1 will squeeze the large ball, and the large ball will move toward the inside of the annular inner cavity. There is a gap between the large ball and the oil leakage hole. At this time, the lubricating oil in the annular inner cavity flows toward the outside of the oil leakage hole, and then spreads downward along the inner wall of the connecting sleeve, thereby reducing the friction between the steel strand group 1 and the connecting sleeve during the rising process (in the shaking state), thereby reducing the scratch and wear between the steel strand group 1 and the connecting sleeve.

[0022] 4. When the steel strand group 1 swings and hits the corresponding large ball, the large ball moves toward the inside of the annular inner cavity, thereby hitting the special-shaped resistance block through the small ball. The special-shaped resistance block squeezes the spring, and the spring stores elastic potential energy. When the steel strand group 1 moves away from the large ball, the elastic potential energy stored in the spring is released, prompting the large ball to return to its position to seal the oil leakage hole. Since the small ball is in contact with the surface of the large ball, there is a gap between the small ball and the large ball, so that the part of the large ball located in the annular inner cavity is immersed in the lubricating oil. When the steel strand group 1 contacts the surface of the large ball during the swinging and rising process, the large ball will be driven to rotate under the action of friction, thereby turning out the part of the large ball adhered with the lubricating oil. The next time the steel strand group 1 contacts the large ball, the lubricating oil on the surface of the large ball can reduce the wear between the steel strand group 1 and the large ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the connection between the concrete segment bridge deck and the hanging basket in the present invention Figure 1 ;

[0024] Figure 2 Schematic diagram of the connection between the concrete segment bridge deck and the hanging basket in the present invention Figure 2 ;

[0025] Figure 3 Schematic diagram of the connection between the concrete segment bridge deck and the hanging basket in the present invention Figure 3 ;

[0026] Figure 4 It is a schematic diagram of the connection between the steel box girder body and the connecting frame 1 in the present invention;

[0027] Figure 5 It is a schematic diagram of the connection between the first steel strand group and the first U-shaped hinged frame in the present invention;

[0028] Figure 6 It is a schematic diagram of the connection between the second steel strand group and the second U-shaped hinged frame in the present invention;

[0029] Figure 7 It is a schematic diagram of the connection between the outer tube and the inner tube in the present invention;

[0030] Figure 8 Schematic diagram of the internal structure of the outer tube in the present invention;

[0031] Fig. 9 Schematic diagram of the internal structure of the annular inner cavity in the present invention;

[0032] Fig.10 It is a schematic diagram of the connection between the special-shaped abutment block and the telescopic rod in the present invention.

[0033] In the figure: 1, concrete segment bridge deck; 2, steel box girder body; 3, hanging basket; 4, installation top seat; 5, steel strand group 1; 6, steel strand group 2; 7, lifting connection assembly 1; 8, lifting connection assembly 2; 9, lifting drive assembly 1; 10, lifting drive assembly 2; 11, connecting frame 1; 12, connecting arm 1; 13, articulated seat 1; 14, U-shaped articulated frame 1; 15, latch column 1; 16, connecting frame 2; 17, connecting arm 2; 18, articulated seat 2; 19. U-shaped hinge frame 2; 20. Latch column 2; 21. Outer tube; 22. Inner tube; 23. Connecting sleeve; 24. Circular chamfer; 25. Limiting ring groove; 26. Limiting ring block; 27. Annular inner cavity; 28. Oil leakage hole; 29. ​​Large ball; 30. Sealing plug; 31. Special-shaped resistance block; 32. Rotating groove; 33. Small ball; 34. Telescopic rod; 35. Spring; 36. U-shaped piece; 37. Locking bolt; 38. Locking nut; 39. Fixed seat. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0035] Reference Figure 1-Figure 10 A longitudinal slope adjustment device for hoisting a steel box girder comprises a hanging basket 3 fixed on a concrete segment bridge deck 1 for hoisting a steel box girder body 2, a mounting top seat 4 being fixed on the upper end surface of the hanging basket 3, a pair of steel strand groups 1 5 and a pair of steel strand groups 2 6 being movably penetrated through the upper end surface of the mounting top seat 4, a same hoisting connection assembly 1 7 being provided at the lower ends of the two steel strand groups 1 5, a same hoisting connection assembly 2 8 being provided at the lower ends of the two steel strand groups 2 6, a lifting drive assembly 1 9 used in conjunction with the steel strand group 1 5 and a lifting drive assembly 2 10 used in conjunction with the steel strand group 2 6 being provided on the upper end surface of the mounting top seat 4.

[0036] Steel strand group 1 5 is composed of multiple steel strands, and steel strand group 2 6 is also composed of multiple steel strands. Steel strand group 1 5 serves as the main sling.

[0037] Lifting drive assembly 1 9 and lifting drive assembly 2 10 are both used in conjunction with a through-hole jack and a pump station, which is the prior art. Lifting drive assembly 1 9 lifting steel strand group 1 5 and lifting drive assembly 2 10 lifting steel strand group 2 6 are both conventional technical means in the field.

[0038] When the steel box girder body 2 is hoisted, the hoisting connection component 1 7 is installed near the middle position of the upper end surface of the steel box girder body 2, and the hoisting connection component 2 8 is installed near the end position of the upper end surface of the steel box girder body 2, and then the steel strand group 1 5 and the steel strand group 2 6 are lifted by the lifting drive component 1 9 and the lifting drive component 2 10, so as to lift the steel box girder body 2 upward. When the steel box girder body 2 is lifted to the specified height and the longitudinal slope of the lifted steel box girder body 2 needs to be adjusted, the lifting drive component 2 10 first suspends the lifting of the steel strand group 2 6, and the lifting drive component 1 9 continues to lift the steel strand group 1 5. At this time, the steel box girder body 2 will deflect slightly, thereby adjusting its longitudinal slope so that it can match the longitudinal slope of the concrete segment bridge deck 1, which is easy to operate.

[0039] The hoisting connection assembly 7 includes two connection frames 11, each of which is hinged to the upper end surface of the steel box girder body 2. The same connection arm 12 is fixed to the inner top of the two connection frames 11, and a connection unit 1 is set between the lower end of each steel strand group 5 and the connection arm 12.

[0040] When in use, the steel strand group 5 and the connecting arm 12 are first in a separated state, so as to facilitate the installation and combination of the connecting frame 11 and the steel box girder body 2.

[0041] Each connecting unit includes an articulated seat 13 fixed to the upper end surface of the connecting arm 12, and a U-shaped articulated frame 14 is fixed to the lower end of each steel strand group 5. A pin column 15 used in conjunction with the articulated seat 13 is detachably provided on the side wall of the U-shaped articulated frame 14.

[0042] After the connection frame 11 and the upper end surface of the steel box girder body 2 are installed and assembled, the lifting drive assembly 9 releases the steel strand group 5 downward, and the steel strand group 5 moves downward with the U-shaped articulated frame 14 close to the corresponding articulated seat 13. When the U-shaped articulated frame 14 descends to the specified height, the latch column 15 is removed, and then the U-shaped articulated frame 14 is matched and connected with the articulated seat 13, and then the latch column 15 is passed through the articulated seat 13 and the U-shaped articulated frame 14 to complete the matched connection between the articulated seat 13 and the U-shaped articulated frame 14. The installation and fixation of the latch column 15 is a conventional technical means in the field.

[0043] The lifting connection assembly 8 includes two connecting frames 16, each of which is hinged to the upper end surface of the steel box girder body 2. The upper end surfaces of the two connecting frames 16 are fixed with the same connecting arm 17, and a connecting unit 2 is arranged between the lower end of each steel strand group 6 and the connecting arm 17.

[0044] When in use, the second connection unit on the second steel strand group 6 is first separated from the second connection arm 17 , thereby facilitating the installation and combination of the second connection frame 16 and the steel box girder body 2 .

[0045] Each connecting unit 2 includes an articulated seat 2 18 fixed to the upper end surface of the connecting arm 2 17, and a U-shaped articulated frame 2 19 is fixed to the lower end of each steel strand group 2 6. A pin column 20 used in conjunction with the articulated seat 2 18 is detachably provided on the side wall of the U-shaped articulated frame 2 19.

[0046] After the installation and assembly of the connecting frame 2 16 and the steel box girder body 2 are completed, the steel strand group 2 6 and the steel strand group 1 5 are released downward together. After the steel strand group 2 6 moves downward to the specified position with the U-shaped articulated frame 2 19, first remove the latch column 20, then match and connect the U-shaped articulated frame 2 19 with the articulated seat 2 18, and then pass the latch column 20 through the corresponding U-shaped articulated frame 2 19 and the articulated seat 2 18, so that the corresponding U-shaped articulated frame 2 19 and the articulated seat 2 18 are matched and connected together. The installation and fixation of the latch column 20 can be achieved in the technical means in this field.

[0047] Before the steel box girder body 2 to be hoisted is moved to the hoisting position, the connection frame 11 and the steel box girder body 2 and the connection frame 2 16 and the steel box girder body 2 can be installed and combined first, and then moved to the hoisting position through a pontoon group or a transport ship.

[0048] Two outer tubes 21 are symmetrically fixed to the lower end surface of the mounting top seat 4, and an inner tube 22 is movably provided at the lower end of each outer tube 21. The upper end of the inner tube 22 movably penetrates into the outer tube 21, and a limiting unit for cooperating with the inner tube 22 is provided in the outer tube 21. A connecting sleeve 23 is fixed to the lower end of each inner tube 22, and a circular chamfer 24 is provided on the inner wall of each connecting sleeve 23 and near the lower end.

[0049] Each steel strand group 5 passes through the center of the corresponding outer tube 21, inner tube 22 and connecting sleeve 23. In the initial state, the outer surface of the steel strand group 5 does not contact the inner walls of the outer tube 21, inner tube 22 and connecting sleeve 23. When the steel strand group 5 cooperates with the steel strand group 26 to hoist the steel box girder body 2, if the steel strand group 5 and the steel box girder body 2 shake, the steel strand group 5 will contact the inner wall of the connecting sleeve 23 during the shaking process, limiting the swing stroke of the steel strand group 5, thereby reducing the shaking amplitude of the steel strand group 5 and the steel box girder body 2.

[0050] A fixing seat 39 used in conjunction with the outer tube 21 is fixedly provided on the lower end surface of the mounting top seat 4 , and the outer tube 21 is fixedly passed through the fixing seat 39 .

[0051] The outer tube 21 is supported and fixed by the fixing seat 39 to prevent the outer tube 21 from shaking during use.

[0052] A limiting ring groove 25 is provided in each inner tube 22 , and a limiting ring block 26 is slidably arranged in each limiting ring groove 25 . The upper end of each inner tube 22 movably penetrates into the limiting ring groove 25 and is fixedly connected to the lower end of the limiting ring block 26 .

[0053] When the steel box girder body 2 is about to rise to the specified height, the steel strand group 5 continues to move upward with the U-shaped articulated frame 14. During this process, the upper end surface of the U-shaped articulated frame 14 will contact the lower end of the connecting sleeve 23, and then move upward with the connecting sleeve 23 and the inner tube 22, thereby driving the limiting ring block 26 to move upward in the limiting ring groove 25, setting the inner tube 22 to a retractable state to avoid affecting the upward movement of the steel box girder body 2.

[0054] An annular inner cavity 27 is provided in each connecting sleeve 23, and a plurality of oil leakage holes 28 are provided on the inner wall of the connecting sleeve 23. A plurality of large balls 29 are movably arranged in the annular inner cavity 27 for use with the oil leakage holes 28. A plurality of resistance units for use with the corresponding large balls 29 are arranged in the annular inner cavity 27. An oil filling hole is provided on the upper end surface of the connecting sleeve 23, and a sealing plug 30 is arranged in the oil filling hole. Lubricating oil is filled in the annular inner cavity 27, and the large balls 29 have a small translational distance, which slows down the flow speed of the lubricating oil between the oil leakage hole 28 and the large balls 29.

[0055] When the steel strand group 5 shakes and contacts the inner wall of the connecting sleeve 23, the steel strand group 5 will squeeze the large ball 29. At this time, the large ball 29 will move toward the inside of the annular inner cavity 27. There is a gap between the large ball 29 and the oil leakage hole 28. At this time, the lubricating oil in the annular inner cavity 27 flows toward the outside of the oil leakage hole 28, and then spreads downward along the inner wall of the connecting sleeve 23, thereby reducing the friction between the steel strand group 5 and the connecting sleeve 23 during the rising process (in the shaking state), thereby reducing the scratch and wear between the steel strand group 5 and the connecting sleeve 23.

[0056] Each resistance unit includes a special-shaped resistance block 31 movably arranged on one side of the large ball 29. A rotating groove 32 is provided on the side of the special-shaped resistance block 31 close to the large ball 29. A plurality of small balls 33 are rotatably arranged on the inner wall of the rotating groove 32. The small balls 33 resist against the surface of the large ball 29. A telescopic rod 34 and a spring 35 are fixed between the special-shaped resistance block 31 and the annular inner cavity 27. The spring 35 is movably sleeved on the outer surface of the telescopic rod 34.

[0057] When the steel strand group 5 swings and contacts the corresponding large ball 29, the large ball 29 moves toward the inside of the annular inner cavity 27, thereby contacting the special-shaped contact block 31 through the small ball 33. The special-shaped contact block 31 squeezes the spring 35, and the spring 35 stores elastic potential energy. When the steel strand group 5 moves away from the large ball 29, the elastic potential energy stored in the spring 35 is released, prompting the large ball 29 to return to its position to block the oil leakage hole 28. Since the small ball 33 is in contact with the surface of the large ball 29, the small ball 33 There is a gap between the large ball 29, so that the part of the large ball 29 located in the annular inner cavity 27 is immersed in the lubricating oil. When the steel strand group 5 contacts the surface of the large ball 29 during the swinging and rising process, the large ball 29 will be driven to rotate under the action of friction, thereby turning out the part of the large ball 29 adhered with the lubricating oil. The next time the steel strand group 5 contacts the large ball 29, the lubricating oil on the surface of the large ball 29 can reduce the wear between the steel strand group 5 and the large ball 29.

[0058] A fixing clamp device for lifting a steel box girder comprises four pairs of U-shaped parts 36, each pair of U-shaped parts 36 is fixedly sleeved on the outer surface of the end of the corresponding latch column 20, two locking bolts 37 are symmetrically arranged between each pair of U-shaped parts 36, and each locking bolt 37 is threadedly connected with a locking nut 38.

[0059] When the steel strand group 26 moves downward to the specified position with the U-shaped articulated frame 219 and is ready to cooperate and connect the U-shaped articulated frame 219 with the articulated seat 218, first remove each locking nut 38 to release the limiting fixation of the U-shaped part 36 on the latch column 20, and then remove the latch column 20 from the U-shaped articulated frame 219. After the U-shaped articulated frame 219 and the articulated seat 218 are fully connected, the latch column 20 is passed through the U-shaped articulated frame 219 and the articulated seat 218, and then each pair of U-shaped parts 36 is respectively sleeved on the outer surface of the corresponding end of the latch column 20, and then the locking bolt 37 is placed, and the locking nut 38 is installed and tightened to achieve the tightening of the latch column 20, which is easy to operate.

[0060] When the present invention is in use, when the steel box girder body 2 is hoisted, the hoisting connection component 1 7 is installed near the middle section of the upper end surface of the steel box girder body 2, and the hoisting connection component 2 8 is installed near the end position of the upper end surface of the steel box girder body 2, and then the steel strand group 1 5 and the steel strand group 2 6 are lifted by the lifting drive component 1 9 and the lifting drive component 2 10, so as to lift the steel box girder body 2 upward. When the steel box girder body 2 is lifted to the specified height, it is necessary to adjust the longitudinal slope of the lifted steel box girder body 2. At this time, the lifting drive component 2 10 first suspends the lifting of the steel strand group 2 6, and the lifting drive component 1 9 continues to lift the steel strand group 1 5. At this time, the steel box girder body 2 will deflect slightly, so as to adjust its longitudinal slope so that it can match the longitudinal slope of the concrete segment bridge deck 1, which is easy to operate.

[0061] Each steel strand group 1 5 passes through the center of the corresponding outer tube 21, inner tube 22 and connecting sleeve 23. In the initial state, the outer surface of the steel strand group 1 5 does not contact the inner wall of the outer tube 21, inner tube 22 and connecting sleeve 23. When the steel strand group 1 5 cooperates with the steel strand group 2 6 to hoist the steel box girder body 2, and the steel strand group 1 5 and the steel box girder body 2 shake, the steel strand group 1 5 will contact the inner wall of the connecting sleeve 23 during the shaking process, and the swing stroke of the steel strand group 1 5 is limited, thereby reducing the shaking amplitude of the steel strand group 1 5 and the steel box girder body 2;

[0062] When the steel strand group 5 shakes and contacts the inner wall of the connecting sleeve 23, the steel strand group 5 will squeeze the large ball 29, and the large ball 29 will move toward the inside of the annular inner cavity 27. There is a gap between the large ball 29 and the oil leakage hole 28. At this time, the lubricating oil in the annular inner cavity 27 flows toward the outside of the oil leakage hole 28, and then spreads downward along the inner wall of the connecting sleeve 23, thereby reducing the friction between the steel strand group 5 and the connecting sleeve 23 during the rising process (in the shaking state), thereby reducing the scratch wear between the steel strand group 5 and the connecting sleeve 23;

[0063] When the steel strand group 5 swings and contacts the corresponding large ball 29, the large ball 29 moves toward the inside of the annular inner cavity 27, thereby contacting the special-shaped contact block 31 through the small ball 33. The special-shaped contact block 31 squeezes the spring 35, and the spring 35 stores elastic potential energy. When the steel strand group 5 moves away from the large ball 29, the elastic potential energy stored in the spring 35 is released, prompting the large ball 29 to return to its position to block the oil leakage hole 28. Since the small ball 33 is in contact with the surface of the large ball 29, the small ball 33 There is a gap between the large ball 29, so that the part of the large ball 29 located in the annular inner cavity 27 is immersed in the lubricating oil. When the steel strand group 5 contacts the surface of the large ball 29 during the swinging and rising process, the large ball 29 will be driven to rotate under the action of friction, thereby turning out the part of the large ball 29 adhered with the lubricating oil. The next time the steel strand group 5 contacts the large ball 29, the lubricating oil on the surface of the large ball 29 can reduce the wear between the steel strand group 5 and the large ball 29.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A longitudinal slope adjustment device for hoisting a steel box girder, comprising a hanging basket (3) fixed on a concrete segment bridge deck (1) for hoisting a steel box girder body (2), characterized in that: The upper end surface of the hanging basket (3) is fixed with a mounting top seat (4), and a pair of steel strand groups (5) and a pair of steel strand groups (6) are movably arranged on the upper end surface of the mounting top seat (4), the lower ends of the two steel strand groups (5) are provided with a same lifting connection component (7), and the lower ends of the two steel strand groups (6) are provided with a same lifting connection component (8), and the upper end surface of the mounting top seat (4) is provided with a lifting drive component (9) used in conjunction with the steel strand group (5) and a lifting drive component (10) used in conjunction with the steel strand group (6).

2. The longitudinal slope adjustment device for steel box girder hoisting according to claim 1 is characterized in that: The hoisting connection assembly (7) comprises two connection frames (11), each of which is hinged to the upper end surface of the steel box girder body (2), and the same connection arm (12) is fixed to the inner top of the two connection frames (11), and a connection unit (1) is arranged between the lower end of each steel strand group (5) and the connection arm (12).

3. The longitudinal slope adjustment device for steel box girder hoisting according to claim 2 is characterized in that: Each of the connecting units comprises an articulated seat (13) fixed to the upper end surface of a connecting arm (12), a U-shaped articulated frame (14) is fixed to the lower end of each steel strand group (5), and a latch column (15) for use with the articulated seat (13) is detachably provided on the side wall of the U-shaped articulated frame (14).

4. The longitudinal slope adjustment device for steel box girder hoisting according to claim 1, characterized in that: The hoisting connection assembly 2 (8) comprises two connection frames 2 (16), each of which is hinged to the upper end surface of the steel box girder body (2), and the upper end surfaces of the two connection frames 2 (16) are fixed with the same connection arm 2 (17), and a connection unit 2 is arranged between the lower end of each steel strand group 2 (6) and the connection arm 2 (17).

5. The longitudinal slope adjustment device for steel box girder hoisting according to claim 4, characterized in that: Each of the connecting units 2 comprises an articulated seat 2 (18) fixed to the upper end surface of the connecting arm 2 (17), and a U-shaped articulated frame 2 (19) is fixed to the lower end of each steel strand group 2 (6), and a latch column 2 (20) for use with the articulated seat 2 (18) is detachably provided on the side wall of the U-shaped articulated frame 2 (19).

6. The longitudinal slope adjustment device for steel box girder hoisting according to claim 1, characterized in that: Two outer tubes (21) are symmetrically fixed on the lower end surface of the mounting top seat (4); an inner tube (22) is movably provided at the lower end of each outer tube (21); the upper end of the inner tube (22) movably penetrates into the outer tube (21); a limiting unit for use with the inner tube (22) is provided in the outer tube (21); a connecting sleeve (23) is fixed at the lower end of each inner tube (22); a circular arc chamfer (24) is provided on the inner wall of each connecting sleeve (23) near the lower end; a fixing seat (39) for use with the outer tube (21) is fixedly provided on the lower end surface of the mounting top seat (4); and the outer tube (21) is fixedly penetrated through the fixing seat (39).

7. The longitudinal slope adjustment device for steel box girder hoisting according to claim 6, characterized in that: A limiting ring groove (25) is provided in each of the inner tubes (22), a limiting ring block (26) is slidably arranged in each of the limiting ring grooves (25), and the upper end of each of the inner tubes (22) movably penetrates into the limiting ring groove (25) and is fixedly connected to the lower end of the limiting ring block (26).

8. The longitudinal slope adjustment device for steel box girder hoisting according to claim 6, characterized in that: Each of the connecting sleeves (23) is provided with an annular inner cavity (27), a plurality of oil leakage holes (28) are provided on the inner wall of the connecting sleeve (23), a plurality of large balls (29) are movably arranged in the annular inner cavity (27) for use with the oil leakage holes (28), a plurality of abutment units are arranged in the annular inner cavity (27) for use with the corresponding large balls (29), an oil injection hole is provided on the upper end surface of the connecting sleeve (23), a sealing plug (30) is arranged in the oil injection hole, and lubricating oil is filled in the annular inner cavity (27).

9. The longitudinal slope adjustment device for steel box girder hoisting according to claim 8, characterized in that: Each of the abutment units comprises a special-shaped abutment block (31) movably arranged on one side of the large ball (29); a rotation groove (32) is provided on the side of the special-shaped abutment block (31) close to the large ball (29); a plurality of small balls (33) are rotatably arranged on the inner wall of the rotation groove (32); the small balls (33) abut against the surface of the large ball (29); a telescopic rod (34) and a spring (35) are fixed between the special-shaped abutment block (31) and the annular inner cavity (27); the spring (35) is movably sleeved on the outer surface of the telescopic rod (34).

10. A fixing clamp device for steel box girder hoisting, applied to the longitudinal slope adjustment device for steel box girder hoisting according to claim 5, comprising four pairs of U-shaped members (36), characterized in that: Each pair of U-shaped members (36) is fixedly sleeved on the outer surface of the end of the corresponding second latch column (20), and two locking bolts (37) are symmetrically arranged between each pair of U-shaped members (36), and each locking bolt (37) is threadedly connected with a locking nut (38).

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