Steel-concrete combined box girder hoisting and assembling equipment and fastening snap ring device

Abstract

The invention discloses steel-concrete combined box girder hoisting and assembling equipment and a fastening snap ring device, relates to the technical field of bridge construction, and solves the technical problem that a plurality of steel strands cannot be comprehensively lubricated due to the fact that a sling for hoisting a box girder in the prior art consists of a plurality of steel strands. Comprising a fixing base installed on the top of a box girder body, a lifting appliance is installed on the fixing base, connecting pieces are symmetrically installed on the top of the lifting appliance, a plurality of steel strands used for lifting are installed on the connecting pieces, and lubricating protection mechanisms are arranged on the steel strands; the lubrication protection mechanism comprises an oil storage shell, an oil suction pipe fitting, an oil coating pipe fitting, an extrusion mechanism and a lifting mechanism, the oil suction pipe fitting is embedded in the position, close to the end, of the oil storage shell, and the oil coating pipe fitting is installed at the top end of the oil suction pipe fitting. According to the lubricating device, comprehensive and uniform lubricating protection can be conveniently carried out on a plurality of steel strands for hoisting the box girder according to needs, so that the stability of the steel strands is effectively ensured, and the hoisting safety of the box girder is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly to a hoisting and assembling device for a steel-concrete composite box girder and a fastening clamp device. Background Art

[0002] During the bridge construction process, especially for the hoisting and assembling of large steel box girders, a method combining floating transportation and hoisting is usually adopted. This method first transports the prefabricated steel box girder segments to the designated location by floating transportation, and then uses a specially designed hoisting system to accurately hoist them in place and assemble them. Floating transportation is an efficient transportation method, especially suitable for bridge construction across water areas, because it can avoid road restrictions and traffic interferences that may be encountered in land transportation.

[0003] In the steel box girder hoisting system, choosing to use a sling composed of multiple thinner steel strands to replace the traditional single thicker steel wire rope has the following advantages: 1. Although the tensile strength of a single thinner steel strand is relatively low, when they are combined together, they can provide higher comprehensive strength. It not only increases the overall load-bearing capacity but also gives the sling better flexibility, enabling it to better adapt to bending and torsion during the hoisting process; 2. The steel strand composed of multiple strands of thin steel wires has a high safety factor. Even if a part of it breaks, the remaining part can still maintain sufficient load-bearing capacity, providing additional safety protection for the hoisting process. In contrast, if it is a thick steel wire rope, once it breaks, the entire hoisting task may immediately face danger.

[0004] Although the sling composed of multiple thinner steel strands is more suitable for the hoisting and assembling of box girders than a single thick steel wire rope, it is not convenient for uniform and comprehensive lubrication. For example: In the patent with the Chinese patent publication number CN114232451B, a box girder hoisting device with adjustable height is disclosed. Although this scheme can lubricate the steel rope used for lifting, it is only applicable to a single steel rope. For a sling composed of multiple thinner steel strands, it is impossible to achieve comprehensive lubrication of the steel strands, resulting in rust and wear conditions in the parts that are difficult to lubricate the steel strands, thus affecting the stability of the tensile force of the steel strands. Summary of the Invention

[0005] The purpose of the present invention is to provide a hoisting and assembling device for a steel-concrete composite box girder and a fastening clamp device, which solves the problem that the sling used for hoisting box girders in the prior art is composed of multiple steel strands, resulting in the inability to achieve comprehensive lubrication of many steel strands.

[0006] The purpose of the present invention can be achieved by the following technical solutions: In the first aspect of the present invention, a hoisting and assembling device for a steel-concrete composite box girder is provided, which includes a fixed seat installed on the top of the box girder body. A lifting tool is installed on the fixed seat. Connecting pieces are symmetrically installed on the top of the lifting tool. Multiple steel strands for hoisting are installed on the connecting pieces. A lubrication and protection mechanism is arranged on the steel strands. The lubrication and protection mechanism includes an oil storage shell, an oil suction pipe fitting, an oil coating pipe fitting, an extrusion mechanism and a lifting mechanism. The oil suction pipe fitting is embedded at a position near the end of the oil storage shell. The oil coating pipe fitting is installed at the top of the oil suction pipe fitting. The steel strand passes through the oil suction pipe fitting and the oil coating pipe fitting. The extrusion mechanism is sleeved on the oil coating pipe fitting, and the extrusion mechanism is connected with the oil storage shell through the lifting mechanism. After the extrusion mechanism rises, it is used to extrude the oil coating pipe fitting to wrap the steel strand.

[0007] As a further scheme of the present invention: The oil suction pipe fitting includes a lower pipe body with an annular cavity, an oil inlet hole, an upper pipe body, a first adsorbent and a second adsorbent. The lower pipe body is fixedly embedded on the oil storage shell, and the lower pipe body penetrates through the oil storage shell. The annular cavity is arranged in the lower pipe body. A plurality of the oil inlet holes are circumferentially arranged on the pipe wall of the lower pipe body near the bottom end, and the oil inlet holes are communicated with the annular cavity. The upper pipe body is fixedly installed at the top of the lower pipe body, and the upper pipe body is communicated with the annular cavity. The first adsorbent is filled in the annular cavity. The second adsorbent is installed on the inner pipe wall of the upper pipe body, and the bottom of the second adsorbent is connected with the top of the first adsorbent.

[0008] As a further scheme of the present invention: The oil coating pipe fitting includes a flexible conduit and a third adsorbent. The third adsorbent is arranged on the inner pipe wall of the flexible conduit. The bottom end of the flexible conduit is connected to the top edge of the upper pipe fitting. The bottom of the third adsorbent is connected with the top of the second adsorbent.

[0009] As a further scheme of the present invention: The extrusion mechanism includes a movable ring, a sliding groove, an extrusion piece, a sliding rod, a spring and a connecting plate. The movable ring is slidably sleeved on the outer pipe wall of the upper pipe body. A plurality of the sliding grooves penetrate through the side wall of the movable ring, and the plurality of sliding grooves are evenly distributed circumferentially along the movable ring. Two ends of the connecting plate are respectively connected to the top and the bottom of the movable ring. One side of the extrusion piece passes through the sliding groove and is connected with the sliding rod. The sliding rod slidably penetrates through the connecting plate. The spring is sleeved on the sliding rod, and the spring is installed between the connecting plate and the extrusion piece.

[0010] As a further scheme of the present invention: An arc-shaped portion is arranged on the side of the extrusion piece away from the sliding rod. The arc-shaped portion is attached to the outer pipe wall of the upper pipe body. An inclined portion is arranged at the bottom of the extrusion piece. The height of the inclined portion at the end close to the arc-shaped portion is greater than the height of the end away from the arc-shaped portion.

[0011] As a further solution of the present invention: The lifting mechanism includes a cross bar, a cylinder, an inverted U-shaped column, a fixing plate, a connecting rod, a support rod and a sliding ring. The two ends of the fixing plate are respectively connected to the outer side walls on both sides of the oil storage shell. The inverted U-shaped column slidably penetrates through the top of the fixing plate and extends downward. The bottom end of the inverted U-shaped column is connected to the cross bar. The cylinder is installed on the top of the fixing plate, and the output end of the cylinder is connected to the lower surface of the top of the inverted U-shaped column. The sliding ring is slidably sleeved at a position near the bottom end of the upper pipe body. The two ends of the connecting rod are respectively connected to the outer side walls of two adjacent sliding rings. The support rod is connected between the sliding ring and the movable ring. The end of the cross bar is connected to the outer side wall of the corresponding sliding ring.

[0012] As a further solution of the present invention: The sling includes a cross beam, longitudinal beams, lifting arms, hanging ears and a first pin. The two longitudinal beams are symmetrically connected to the top of the cross beam near both ends. The two lifting arms are rotatably installed at both ends of the longitudinal beams. The lifting arm is connected to the fixed seat through the first pin. The two hanging ears are symmetrically installed on the top of the cross beam.

[0013] As a further solution of the present invention: The connecting piece includes an inverted U-shaped plate and a second pin. The inverted U-shaped plate is sleeved on the hanging ear, and the inverted U-shaped plate is connected to the hanging ear through the second pin.

[0014] As a further solution of the present invention: Connecting frames are symmetrically and fixedly installed on the outer side wall of the oil storage shell, and a fuel injection pipe is communicated with the top of the oil storage shell.

[0015] In the second aspect of the present invention, a fastening snap ring device is provided, which is applied to the above-mentioned steel-concrete composite box girder hoisting and assembling equipment, and includes a limiting mechanism arranged on the second pin. The limiting mechanism includes an upper snap ring, a lower snap ring, an arc-shaped convex block, an arc-shaped groove and a locking piece. The upper snap ring and the lower snap ring are symmetrically arranged up and down, and the upper snap ring and the lower snap ring are attached to one side of the inverted U-shaped plate. The arc-shaped convex block is installed on the opposite side of the upper snap ring and the lower snap ring. Arc-shaped grooves corresponding to the arc-shaped convex blocks are opened at the top and bottom of the second pin. The upper snap ring and the lower snap ring are locked through the locking piece.

[0016] The beneficial effects of the present invention: 1. In the present invention, by installing the fixed seat at a suitable position on the top of the box girder body to be hoisted, it is convenient to realize the installation and docking with the box girder body in cooperation with the sling, and it is convenient to connect the steel strand for hoisting with the sling by using the connecting piece, so that the box girder body can be hoisted and assembled by lifting the sling through the steel strand.

[0017] 2. In the present invention, by penetrating the oil storage shell with an oil suction pipe fitting and an oil coating pipe fitting through which the steel strands can pass, the steel strands do not contact the inner walls of the oil suction pipe fitting and the oil coating pipe fitting during normal lifting and lowering, thereby avoiding wear as much as possible. The oil suction pipe fitting automatically absorbs the lubricating oil in the oil storage shell and transfers the absorbed lubricating oil to the oil coating pipe fitting. The oil coating pipe fitting is squeezed to wrap the steel strands used for lifting, so that relative sliding can occur between the steel strands and the oil coating pipe fitting. Since the oil coating pipe fitting wraps the steel strands under pressure, the absorbed lubricating oil can be evenly transferred to the outer surface of the steel strand. The lubricating oil consumed in the oil coating pipe fitting can be automatically supplied by the oil suction pipe fitting, thereby facilitating comprehensive and uniform lubrication of the steel strands.

[0018] 3. In the present invention, the lifting mechanism is used to conveniently drive the extrusion mechanisms corresponding to each steel strand to achieve synchronous lifting and lowering. After the extrusion mechanism rises, it is convenient to apply an extrusion force evenly distributed along its circumference to the oiled pipe fittings, so that the oiled pipe fittings can wrap the steel strands after being pressed, which is convenient for lubrication. After the extrusion mechanism is controlled to descend, it is convenient to cancel the pressure on the oiled pipe fittings, which is convenient for the oiled pipe fittings to return to a normal state. This can not only avoid the situation where the oiled pipe fittings are excessively lubricated due to long-term contact with the steel strands, thereby preventing the waste of lubricating oil, but also enable the lubrication of the steel strands to be controlled as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a three-dimensional diagram of a steel-concrete combined box beam lifting and assembly device of the present invention; Figure 2 It is a stereoscopic diagram of the connection part between the steel strand and the lubrication protection mechanism in the steel-concrete combined box girder lifting and assembly equipment of the present invention; Figure 3 It is a partial stereoscopic diagram of a lubrication protection mechanism in a steel-concrete combined box beam lifting and assembly device of the present invention; Figure 4 It is a stereoscopic diagram of the connection part between the oil absorption pipe fitting and the oil coating pipe fitting in the steel-concrete combined box beam lifting and assembly equipment of the present invention; Figure 5 It is a three-dimensional diagram of the oil absorption pipe fitting and the oil coating pipe fitting in the steel-concrete combined box beam lifting and assembly equipment of the present invention after being cut apart; Figure 6 It is a stereoscopic diagram of the connection part between the extrusion mechanism and the sliding ring in the steel-concrete combined box beam lifting and assembly equipment of the present invention; Figure 7 It is a three-dimensional diagram of an extruded part in a steel-concrete combined box beam lifting and assembly device of the present invention; Figure 8 It is a partial stereogram of a lifting mechanism in a steel-concrete combined box beam lifting and assembly device of the present invention; Figure 9 It is a three-dimensional view of the connection part between the connecting piece and the lifting tool in a steel-concrete composite box girder lifting and assembling device of the present invention; Figure 10 It is a three-dimensional view of the limit mechanism after decomposition in a fastening snap ring device of the present invention.

[0021] In the figure: 1. Box girder body; 2. Fixed seat; 3. Lifting tool; 31. Cross beam; 32. Longitudinal beam; 33. Lifting arm; 34. Hanging ear; 35. First pin; 4. Connecting piece; 41. Inverted U-shaped plate; 42. Second pin; 5. Steel strand; 6. Lubrication and protection mechanism; 61. Oil storage shell; 611. Connecting frame; 612. Oil injection pipe; 62. Oil suction pipe fitting; 621. Annular cavity; 622. Lower pipe body; 623. Oil inlet hole; 624. Upper pipe body; 625. First suction accessory; 626. Second suction accessory; 63. Oil coating pipe fitting; 631. Flexible conduit; 632. Third suction accessory; 64. Extrusion mechanism; 641. Movable ring; 642. Sliding groove; 643. Extrusion piece; 6431. Arc part; 6432. Inclined part; 644. Slide bar; 645. Spring; 646. Connecting plate; 65. Lifting mechanism; 651. Cross bar; 652. Cylinder; 653. Inverted U-shaped column; 654. Fixed plate; 655. Connecting rod; 656. Support rod; 657. Sliding ring; 7. Limit mechanism; 71. Upper snap ring; 72. Lower snap ring; 73. Arc convex block; 74. Arc groove; 75. Threaded pin; 76. Locking nut. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] Such as Figures 1 - 10As shown in the figure, the present invention is a steel-concrete composite box girder hoisting and assembling device, which includes a fixed seat 2 installed on the top of the box girder body 1. A hoisting tool 3 is installed on the fixed seat 2. Connectors 4 are symmetrically installed on the top of the hoisting tool 3. Multiple steel strands 5 for hoisting are installed on the connectors 4. A lubrication and protection mechanism 6 is arranged on the steel strands 5. The lubrication and protection mechanism 6 includes an oil storage shell 61, an oil suction pipe fitting 62, an oil coating pipe fitting 63, an extrusion mechanism 64 and a lifting mechanism 65. The oil suction pipe fitting 62 is embedded at a position near the end of the oil storage shell 61. The oil coating pipe fitting 63 is installed at the top of the oil suction pipe fitting 62. The steel strand 5 passes through the oil suction pipe fitting 62 and the oil coating pipe fitting 63. The extrusion mechanism 64 is sleeved on the oil coating pipe fitting 63, and the extrusion mechanism 64 is connected to the oil storage shell 61 through the lifting mechanism 65. After the extrusion mechanism 64 rises, it is used to extrude the oil coating pipe fitting 63 to wrap the steel strand 5.

[0024] It should be noted that during use, first, the fixed seat 2 is positioned and installed at a suitable position on the top of the box girder body 1 to be hoisted. Then, the hoisting tool 3 is installed and docked with the fixed seat 2. Finally, the connector 4 equipped with the steel strand 5 is installed and docked with the hoisting tool 3. By winding the steel strand 5, the hoisting of the box girder body 1 can be realized. In this embodiment, above the box girder body 1 to be hoisted is a concrete segment bridge. A hanging basket is installed on the concrete segment bridge, and a hoisting system for winding and unwinding the steel strand 5 is installed on the hanging basket (this is common general knowledge in the art and will not be elaborated here). When lubrication and protection of the steel strand 5 are required, the lifting mechanism 65 is used to control the synchronous rising of the extrusion mechanisms 64 corresponding to each steel strand 5. After the extrusion mechanisms 64 rise, a uniformly distributed extrusion force along the circumferential direction of the oil coating pipe fitting 63 can be applied, so that the oil coating pipe fitting 63 wraps the steel strand 5. The oil suction pipe fitting 62 can automatically adsorb the lubricating oil in the oil storage shell 61 and transfer the adsorbed lubricating oil to the oil coating pipe fitting 63. When the steel strand 5 is wound and unwound, relative sliding will occur between the steel strand 5 and the oil coating pipe fitting 63, so that the lubricating oil adsorbed by the oil coating pipe fitting 63 can be evenly and comprehensively coated on the outer surface of the steel strand 5. After controlling the extrusion mechanism 64 to descend and reset, the pressure on the oil coating pipe fitting 63 can be cancelled, so that the oil coating pipe fitting 63 returns to its normal state. At this time, the inner wall of the oil coating pipe fitting 63 does not contact the steel strand 5, and the lubrication can be stopped.

[0025] Such as Figures 3 - 5As shown, the oil suction pipe fitting 62 includes a lower pipe body 622 with an annular cavity 621, an oil inlet hole 623, an upper pipe body 624, a first adsorbing member 625 and a second adsorbing member 626. The lower pipe body 622 is fixedly embedded in the oil storage shell 61, and the lower pipe body 622 penetrates through the oil storage shell 61. The annular cavity 621 is arranged inside the lower pipe body 622. A plurality of oil inlet holes 623 are circumferentially arranged on the pipe wall of the lower pipe body 622 near the bottom end, and the oil inlet holes 623 communicate with the annular cavity 621. The upper pipe body 624 is fixedly installed at the top end of the lower pipe body 622, and the upper pipe body 624 communicates with the annular cavity 621. The first adsorbing member 625 is filled and arranged in the annular cavity 621. The second adsorbing member 626 is installed on the inner pipe wall of the upper pipe body 624, and the bottom of the second adsorbing member 626 is connected to the top of the first adsorbing member 625.

[0026] It should be noted that the lower pipe body 622 and the upper pipe body 624 are rigid pipes. The connection between the lower pipe body 622 and the oil storage shell 61 is sealed to ensure that there is no oil leakage after the lower pipe body 622 penetrates through the oil storage shell 61. The lubricating oil in the oil storage shell 61 can enter the annular cavity 621 through the oil inlet holes 623 and be adsorbed by the first adsorbing member 625 in the annular cavity 621. The lubricating oil adsorbed by the first adsorbing member 625 can be adsorbed by the second adsorbing member 626 in the upper pipe body 624. Both the first adsorbing member 625 and the second adsorbing member 626 in this embodiment are made of sponge material.

[0027] As Figures 3 - 5 shown, the oil coating pipe fitting 63 includes a flexible conduit 631 and a third adsorbing member 632. The third adsorbing member 632 is arranged on the inner pipe wall of the flexible conduit 631. The bottom end of the flexible conduit 631 is connected to the top edge of the upper pipe fitting, and the bottom of the third adsorbing member 632 is connected to the top of the second adsorbing member 626.

[0028] It should be noted that the third adsorbing member 632 in this embodiment is also made of sponge material. The flexible conduit 631 is a rubber hose or a PVC hose. Under normal conditions, the inner diameter of the flexible conduit 631 is larger than the outer diameter of the steel strand 5. That is to say, when the steel strand 5 is not lubricated, it does not contact the third adsorbing member 632 on the inner wall of the flexible conduit 631 during the lifting and hoisting process (non-vibrating state).

[0029] As Figures 3 - 4 and Figure 6As shown, the extrusion mechanism 64 includes a movable ring 641, a sliding groove 642, an extrusion piece 643, a sliding rod 644, a spring 645 and a connecting plate 646. The movable ring 641 is slidably sleeved with the outer tube wall of the upper tube body 624. A plurality of sliding grooves 642 are penetrated and arranged on the side wall of the movable ring 641, and the plurality of sliding grooves 642 are evenly distributed along the circumference of the movable ring 641. The two ends of the connecting plate 646 are respectively connected to the top and bottom of the movable ring 641. One side of the extrusion piece 643 passes through the sliding groove 642 and is connected to the sliding rod 644. The sliding rod 644 slides through the connecting plate 646. The spring 645 is sleeved on the sliding rod 644, and the spring 645 is installed between the connecting plate 646 and the extrusion piece 643.

[0030] It should be noted that when the movable ring 641 is sleeved on the upper tube body 624, the spring 645 is in a compressed and force-accumulating state. At this time, the end of the extrusion piece 643 away from the sliding rod 644 is in contact with the outer tube wall of the upper tube body 624. The movable ring 641 is pushed up to separate it from the upper tube body 624 and slide onto the flexible conduit 631. At this time, the spring 645 will reset, thereby pushing the extrusion piece 643 to apply pressure to the flexible conduit 631, so that the flexible conduit 631 can wrap the steel strand 5. In this embodiment, each extrusion mechanism 64 includes four extrusion pieces 643 that are equidistantly distributed circumferentially.

[0031] like Figures 6 - 7 As shown, an arc portion 6431 is provided on the side of the extrusion piece 643 away from the slide rod 644, and the arc portion 6431 is in contact with the outer tube wall of the upper tube body 624. An inclined portion 6432 is provided at the bottom of the extrusion piece 643, and the height of the inclined portion 6432 close to one end of the arc portion 6431 is greater than the height away from the other end of the arc portion 6431.

[0032] It should be noted that when the spring 645 drives the extruding member 643 to return to its original position, the arc portion 6431 will press the flexible conduit 631 (such as Figure 4 When the outer tube wall of the extrusion member 643 is pressed and the movable ring 641 is controlled to descend and reset, the inclined portion 6432 of the extrusion member 643 is subjected to the extrusion force, thereby facilitating the adaptive pushing of the extrusion member 643 to slide in the direction close to the slide bar 644, so that the extrusion member 643 can automatically retract into the slide groove 642.

[0033] like Figures 2 - 4 , Figure 6 and Figure 8As shown in the figure, the lifting mechanism 65 includes a cross bar 651, a cylinder 652, an inverted U-shaped column 653, a fixing plate 654, a connecting rod 655, a support rod 656 and a sliding ring 657. The two ends of the fixing plate 654 are respectively connected to the outer side walls of both sides of the oil storage shell 61. The inverted U-shaped column 653 slides through the top of the fixing plate 654 and extends downward. The bottom end of the inverted U-shaped column 653 is connected to the cross bar 651. The cylinder 652 is installed on the top of the fixing plate 654, and the output end of the cylinder 652 is connected to the lower surface of the top of the inverted U-shaped column 653. The sliding ring 657 is slidably sleeved at a position near the bottom end of the upper pipe body 624. The two ends of the connecting rod 655 are respectively connected to the outer side walls of two adjacent sliding rings 657. The support rod 656 is connected between the sliding ring 657 and the movable ring 641. The end of the cross bar 651 is connected to the outer side wall of the corresponding sliding ring 657.

[0034] It should be noted that when the cylinder 652 is started to drive the inverted U-shaped column 653 to slide upward along the fixing plate 654, the inverted U-shaped column 653 drives the cross bar 651 to rise synchronously. The connecting rod 655 connects the adjacent sliding rings 657 together, so that multiple sliding rings 657 can be lifted synchronously. Driving one of the sliding rings 657 to rise by the cross bar 651 can drive all the sliding rings 657 to rise synchronously. During the rising process, all the movable rings 641 can be driven to rise synchronously by using the support rod 656. In this embodiment, the maximum stroke of the cylinder 652 driving the sliding ring 657 does not exceed the height of the upper pipe body 624, ensuring that the sliding ring 657 will never be separated from the upper pipe body 624.

[0035] As Figure 1 and Figure 9 shown in the figure, the spreader 3 includes a cross beam 31, longitudinal beams 32, lifting arms 33, hanging ears 34 and a first pin 35. The two longitudinal beams 32 are symmetrically connected to the top of the cross beam 31 near both ends. The two lifting arms 33 are rotatably installed at both ends of the longitudinal beams 32. The lifting arm 33 is connected to the fixed seat 2 through the first pin 35. The two hanging ears 34 are symmetrically installed on the top of the cross beam 31.

[0036] It should be noted that the fixed seat 2 of this embodiment is butt-jointed and installed with the top of the box girder body 1 through fastening bolts. The lifting arm 33 and the fixed seat 2 are provided with first through holes for the first pin 35 to penetrate and be positioned.

[0037] As Figure 1 and Figure 9 shown in the figure, the connecting member 4 includes an inverted U-shaped plate 41 and a second pin 42. The inverted U-shaped plate 41 is sleeved on the hanging ear 34, and the inverted U-shaped plate 41 is connected to the hanging ear 34 through the second pin 42.

[0038] It should be noted that the inverted U-shaped plate 41 and the hanging ear 34 are provided with second through holes for the second pin 42 to pass through.

[0039] AsFigure 2 As shown in the figure, connecting brackets 611 are symmetrically and fixedly installed on the outer side wall of the oil storage shell 61, and an oil injection pipe 612 is connected to the top of the oil storage shell 61.

[0040] It should be noted that the oil storage shell 61 is connected to the hanging basket (not marked in the figure) through the connecting brackets 611, so as to achieve a rigid connection between the oil storage shell 61 and the hanging basket, thereby ensuring the stability of the position of the oil storage shell 61. The oil injection pipe 612 is used to conveniently supplement lubricating oil into the oil storage shell 61 in a timely manner.

[0041] As Figures 9 - 10 shown, an embodiment of the present invention provides a fastening snap ring device, which includes a limiting mechanism 7 arranged on the second pin 42. The limiting mechanism 7 includes an upper snap ring 71, a lower snap ring 72, an arc-shaped convex block 73, an arc-shaped groove 74 and a locking member. The upper snap ring 71 and the lower snap ring 72 are symmetrically arranged up and down, and the upper snap ring 71 and the lower snap ring 72 are attached to one side of the inverted U-shaped plate 41. The arc-shaped convex block 73 is installed on the opposite sides of the upper snap ring 71 and the lower snap ring 72. Arc-shaped grooves 74 corresponding to the arc-shaped convex blocks 73 are opened at the top and bottom of the second pin 42. The upper snap ring 71 and the lower snap ring 72 are locked through the locking member.

[0042] It should be noted that the locking member includes a threaded pin 75 and a locking nut 76. The threaded pins 75 are symmetrically installed on the top of the lower snap ring 72. Insertion holes for the threaded pins 75 to pass through are opened on the upper snap ring 71. The locking nut 76 is threadedly sleeved on the threaded pin 75. In order to ensure the stability of the docking of the inverted U-shaped plate 41 and the hanging ear 34, it is necessary to ensure that the inserted second pin 42 will not slide and displace after being installed in place. By opening an arc-shaped groove 74 on the second pin 42 that matches the arc-shaped convex block 73, the depth of the arc-shaped groove 74 is relatively shallow and is not likely to affect the overall strength of the second pin 42. Rubber for increasing the biting force can be installed on the inner circles of the upper snap ring 71 and the lower snap ring 72. After the arc-shaped convex blocks 73 on the upper snap ring 71 and the lower snap ring 72 are engaged with the arc-shaped grooves 74, the threaded pin 75 will pass through the insertion hole, and the locking nut 76 is screwed tightly on the threaded pin 75, then the positions of the upper snap ring 71 and the lower snap ring 72 can be locked. At this time, the upper snap ring 71 and the lower snap ring 72 are attached to one side of the inverted U-shaped plate 41, ensuring that the installed threaded pin 75 will not slide and displace in any way, thereby ensuring the stability of the docking of the inverted U-shaped plate 41 and the hanging ear 34.

[0043] Working principle of the present invention: When the steel strand 5 needs to be lubricated, the cylinder 652 is started to drive the inverted U-shaped column 653 to slide upward along the fixed plate 654. The inverted U-shaped column 653 drives the cross bar 651 to rise synchronously. The connecting rod 655 connects adjacent sliding rings 657 together, enabling multiple sliding rings 657 to achieve synchronous lifting and lowering. Driving one of the sliding rings 657 to rise by the cross bar 651 can drive all the sliding rings 657 to rise synchronously. During the rising process, all the movable rings 641 can be driven to rise synchronously by using the support rod 656. The movable ring 641 is pushed upward to separate it from the upper pipe body 624 and slide onto the flexible conduit 631. At this time, the spring 645 will reset, thereby pushing the extrusion member 643 to apply pressure to the flexible conduit 631, enabling the flexible conduit 631 to wrap the steel strand 5. The lubricating oil in the oil storage shell 61 can enter the annular cavity 621 through the oil inlet hole 623 and be adsorbed by the first adsorbent 625 in the annular cavity 621. The lubricating oil adsorbed by the first adsorbent 625 can be adsorbed by the second adsorbent 626 in the upper pipe body 624, and the second adsorbent 626 can be adsorbed by the third adsorbent 632 in the flexible conduit 631. When the flexible conduit 631 is pressed to wrap the steel strand 5, at this time, the third adsorbent 632 in the flexible conduit 631 will wrap the steel strand 5. Relative sliding will occur between the steel strand 5 and the third adsorbent 632 in the flexible conduit 631 during the lifting process, so that the lubricating oil can be uniformly replenished to the outer surface of the steel strand 5 through the third adsorbent 632, achieving comprehensive lubrication and protection. When the lubrication of the steel strand 5 is completed, the cylinder 652 is controlled to contract and reset, which can drive all the movable rings 641 to descend. At this time, the inclined part 6432 of the extrusion member 643 will be subjected to the extrusion force, so that the extrusion member 643 can be adaptively pushed to slide in the direction close to the slide bar 644, enabling the extrusion member 643 to automatically retract into the sliding groove 642 and no longer apply pressure to the flexible conduit 631, so that the flexible conduit 631 can return to its normal state. At this time, the steel strand 5 will not contact the third adsorbent 632 during the hoisting process, thus stopping lubrication and avoiding the situation of over-lubrication caused by the third adsorbent 632 always contacting the steel strand 5, enabling the lubrication of the steel strand 5 to be controlled as needed and preventing waste of lubricating oil.

[0044] The above has described an embodiment of the present invention in detail, but the described content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equal changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A hoisting and assembling device for a steel-concrete composite box girder, comprising a fixed seat (2) installed on the top of the box girder body (1), characterized in that, A sling (3) is installed on the fixed seat (2). Connectors (4) are symmetrically installed at the top of the sling (3). Multiple steel strands (5) for hoisting are installed on the connectors (4). A lubrication and protection mechanism (6) is arranged on the steel strands (5); the lubrication and protection mechanism (6) includes an oil storage shell (61), an oil suction pipe fitting (62), an oil coating pipe fitting (63), an extrusion mechanism (64) and a lifting mechanism (65). The oil suction pipe fitting (62) is fixedly embedded at a position near the end of the oil storage shell (61). The oil coating pipe fitting (63) is installed at the top end of the oil suction pipe fitting (62). The steel strand (5) passes through the oil suction pipe fitting (62) and the oil coating pipe fitting (63). The extrusion mechanism (64) is sleeved on the oil coating pipe fitting (63), and the extrusion mechanism (64) is connected to the oil storage shell (61) through the lifting mechanism (65). After the extrusion mechanism (64) rises, it is used to extrude the oil coating pipe fitting (63) to wrap the steel strand (5).

2. The steel-concrete composite box girder hoisting and assembling equipment according to claim 1, wherein The oil suction pipe fitting (62) includes a lower pipe body (622) with an annular cavity (621), an oil inlet hole (623), an upper pipe body (624), a first adsorbent (625) and a second adsorbent (626). The lower pipe body (622) is fixedly embedded in the oil storage shell (61), and the lower pipe body (622) penetrates through the oil storage shell (61). The annular cavity (621) is arranged in the lower pipe body (622). A plurality of the oil inlet holes (623) are circumferentially arranged on the pipe wall of the lower pipe body (622) near the bottom end, and the oil inlet holes (623) are communicated with the annular cavity (621). The upper pipe body (624) is fixedly installed at the top end of the lower pipe body (622), and the upper pipe body (624) is communicated with the annular cavity (621). The first adsorbent (625) is filled in the annular cavity (621). The second adsorbent (626) is installed on the inner pipe wall of the upper pipe body (624), and the bottom of the second adsorbent (626) is connected to the top of the first adsorbent (625).

3. The hoisting and assembling equipment for the steel-concrete composite box girder according to claim 2, wherein The oil coating pipe fitting (63) includes a flexible conduit (631) and a third adsorbent (632). The third adsorbent (632) is arranged on the inner pipe wall of the flexible conduit (631). The bottom end of the flexible conduit (631) is connected to the top edge of the upper pipe fitting. The bottom of the third adsorbent (632) is connected to the top of the second adsorbent (626).

4. The steel-concrete composite box girder hoisting and assembling equipment according to claim 2, characterized in that, The extrusion mechanism (64) includes a movable ring (641), a sliding groove (642), an extrusion member (643), a sliding rod (644), a spring (645), and a connecting plate (646). The movable ring (641) is slidably sleeved on the outer pipe wall of the upper pipe body (624). A plurality of the sliding grooves (642) are arranged through the side wall of the movable ring (641), and the plurality of the sliding grooves (642) are evenly distributed along the circumferential direction of the movable ring (641). Both ends of the connecting plate (646) are respectively connected to the top and bottom of the movable ring (641). One side of the extrusion member (643) passes through the sliding groove (642) and is connected to the sliding rod (644). The sliding rod (644) is slidably arranged through the connecting plate (646). The spring (645) is sleeved on the sliding rod (644), and the spring (645) is installed between the connecting plate (646) and the extrusion member (643).

5. The steel-concrete composite box girder hoisting and assembling equipment according to claim 4, characterized in that, An arc portion (6431) is provided on the side of the extrusion member (643) away from the sliding rod (644). The arc portion (6431) is attached to the outer pipe wall of the upper pipe body (624). An inclined portion (6432) is provided at the bottom of the extrusion member (643). The height of the inclined portion (6432) at the end close to the arc portion (6431) is greater than the height of the end away from the arc portion (6431).

6. The hoisting and assembling equipment for the steel-concrete composite box girder according to claim 4, characterized in that, The lifting mechanism (65) includes a cross bar (651), a cylinder (652), an inverted U-shaped column (653), a fixing plate (654), a connecting rod (655), a support rod (656), and a sliding ring (657). Both ends of the fixing plate (654) are respectively connected to the outer side walls on both sides of the oil storage shell (61). The inverted U-shaped column (653) slidably penetrates through the top of the fixing plate (654) and extends downward. The bottom end of the inverted U-shaped column (653) is connected to the cross bar (651). The cylinder (652) is installed on the top of the fixing plate (654), and the output end of the cylinder (652) is connected to the lower surface of the top of the inverted U-shaped column (653). The sliding ring (657) is slidably sleeved at a position near the bottom end of the upper pipe body (624). Both ends of the connecting rod (655) are respectively connected to the outer side walls of two adjacent sliding rings (657). The support rod (656) is connected between the sliding ring (657) and the movable ring (641). The end of the cross bar (651) is connected to the outer side wall of the corresponding sliding ring (657).

7. A steel-concrete composite box girder hoisting and assembling device according to claim 1, characterized in that, The lifting appliance (3) includes a cross beam (31), longitudinal beams (32), lifting arms (33), hanging ears (34), and a first bolt (35). The two longitudinal beams (32) are symmetrically connected to the top of the cross beam (31) near both ends. The two lifting arms (33) are rotatably installed at both ends of the longitudinal beams (32). The lifting arms (33) are connected to the fixed seat (2) through the first bolt (35). The two hanging ears (34) are symmetrically installed on the top of the cross beam (31).

8. The hoisting and assembling equipment for the steel-concrete composite box girder according to claim 7, characterized in that, The connecting member (4) includes an inverted U-shaped plate (41) and a second pin (42). The inverted U-shaped plate (41) is sleeved on the hanging ear (34), and the inverted U-shaped plate (41) is connected to the hanging ear (34) through the second pin (42).

9. The hoisting and assembling equipment for the steel-concrete composite box girder according to claim 1, characterized in that, Connecting frames (611) are symmetrically and fixedly installed on the outer side wall of the oil storage shell (61), and an oil injection pipe (612) is communicated with the top of the oil storage shell (61).

10. A fastening snap ring device is applied to a steel-concrete composite box girder hoisting and assembling device as described in claim 8, and includes a limiting mechanism (7) arranged on a second bolt (42), and is characterized in that, The limiting mechanism (7) includes an upper clamping ring (71), a lower clamping ring (72), an arc-shaped convex block (73), an arc-shaped groove (74) and a locking member. The upper clamping ring (71) and the lower clamping ring (72) are symmetrically arranged up and down, and the upper clamping ring (71) and the lower clamping ring (72) are attached to one side of the inverted U-shaped plate (41). The arc-shaped convex block (73) is installed on the facing sides of the upper clamping ring (71) and the lower clamping ring (72). Arc-shaped grooves (74) corresponding to the arc-shaped convex blocks (73) are formed at the top and bottom of the second pin (42). The upper clamping ring (71) and the lower clamping ring (72) are locked through the locking member.

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