Large and long prefabricated part sling

Abstract

The invention provides a large and long prefabricated part sling which comprises two universal beams and two truss beams, the two universal beams are connected through a connecting beam, lower side lifting ropes connected with the truss beams are arranged at the two ends of the universal beams respectively, balance adjusting mechanisms are arranged on the upper sides of the universal beams, and lifting connecting mechanisms are arranged on the lower sides of the truss beams; the balance adjusting mechanism comprises a balance beam, the upper side of the balance beam is provided with a top lifting rope, and the lower side is provided with an upper lifting rope; the lifting connecting mechanism comprises an upper pressing beam, the upper side of which is provided with a bottom lifting rope and the lower side of which is provided with a sling. According to the sling for the large and long prefabricated part, the self-adaptive longitudinal slope lightweight design is suitable for offshore large-span and large-tonnage prefabricated box girder hoisting, the sling assembly and sling disassembly efficiency is high, box girder hoisting is safe and reliable, the great popularization value is achieved, the social benefit is good, and a reference function is provided for offshore large box girder hoisting.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a long prefabricated component lifting sling. Background Art

[0002] With the development of large-scale bridge projects such as those spanning seas and rivers, offshore construction is gradually trending towards prefabricated construction. The prefabricated box girder structures on bridges are constantly breaking the limits of excessive length and weight. This places higher demands on the lightweight, stability, operability, and safety of the rigging used to hoist the entire component. Each box girder is symmetrically set with four hoisting holes. The box girder and the rigging are connected by slings and hoisted as a whole by a crane vessel. The box girder is heavy and has a long lifting distance. Offshore hoisting is greatly affected by wind and waves, and alignment accuracy is difficult to control. The hoisting is time-consuming and risky. Taking into account the actual on-site construction conditions, a long prefabricated component hoisting rigging was invented to meet the lifting requirements of large-span, large-tonnage long prefabricated components at sea under different working conditions. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a long prefabricated component lifting sling.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A long prefabricated component lifting sling includes two universal beams and two truss beams. The two universal beams are connected by a connecting beam. Both ends of the universal beams are respectively provided with lower lifting ropes connected to the truss beams. A balance adjustment mechanism is provided on the upper side of the universal beam, and a lifting connection mechanism is provided on the lower side of the truss beam; the balance adjustment mechanism includes a balance beam, a top lifting rope is provided on the upper side of the balance beam, and an upper lifting rope is provided on the lower side; the lifting connection mechanism includes an upper pressure beam, a bottom lifting rope is provided on the upper side of the upper pressure beam, and a lifting rope is provided on the lower side.

[0006] Furthermore, a joist mechanism is provided at the lower end of the sling.

[0007] Furthermore, steering pieces are respectively provided at both ends of the universal beam, and the lower end of the upper hanging rope and the upper end of the lower hanging rope are respectively installed on the steering pieces.

[0008] Furthermore, lower suspension ropes connected to the truss beams are symmetrically provided at both ends of the universal beam.

[0009] Furthermore, the balancing beam comprises an upper balancing beam and a lower balancing beam. A connecting arm is provided on the upper portion of the lower balancing beam, and the connecting arm is hinged to the upper balancing beam via an axis.

[0010] Furthermore, an upper oblique section is provided on the lower portion of the balancing upper beam, and a lower oblique section is provided on the upper portion of the balancing lower beam.

[0011] Furthermore, the lower side lifting rope adopts a circular high-strength lifting rope.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The present invention provides a long prefabricated component lifting sling with an adaptive longitudinal slope and lightweight design, which is suitable for the lifting of large-span and large-tonnage prefabricated box girders at sea. The sling assembly and sling disassembly efficiency are high, and the box girder lifting is safe and reliable. It has great promotion value and good social benefits, and provides a reference for the lifting of large box girders at sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 Front view created for the present invention;

[0016] Figure 2 A side view created for the present invention;

[0017] Figure 3 A side view of the balance adjustment mechanism of the present invention;

[0018] Figure 4 Front view of the main force-bearing mechanism in the invention;

[0019] Figure 5 A side view of the main force-bearing mechanism in the invention;

[0020] Figure 6 A top view of the main force-bearing mechanism in the invention;

[0021] Figure 7 A side view of the sling control mechanism in the invention.

[0022] Description of reference numerals:

[0023] 1. Top lifting rope; 2. Balance beam; 3. Upper lifting rope; 4. Connecting beam; 5. Lower lifting rope; 6. Truss beam; 7. Upper pressure beam; 8. Lifting rope; 9. Rope splitter; 10. Beam support mechanism; 11. Universal beam; 12. Steering member; 13. Lifting rope control assembly; 130. Generator system; 131. Winch; 132. Electric hoist; 133. Pulley block; 14. Bottom lifting rope; 15. Upper bevel; 16. Lower bevel. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] A long prefabricated component lifting sling, such as Figures 1 to 7 As shown, the main force-bearing mechanism includes two universal beams 11 and two truss beams 6. The two universal beams are connected by a connecting beam 4. Both ends of the universal beam are respectively provided with a lower suspension rope 5 connected to the truss beam. The upper side of the universal beam is provided with a balance adjustment mechanism, and the lower side of the truss beam is provided with a lifting connection mechanism; the balance adjustment mechanism includes a balance beam 2, the upper side of the balance beam is provided with a top suspension rope 1, and the lower side is provided with an upper suspension rope 3; the lifting connection mechanism includes an upper pressure beam 7, the upper side of the upper pressure beam is provided with a bottom suspension rope 14, and the lower side is provided with a suspension rope 8.

[0029] A supporting beam mechanism is provided at the lower end of the sling. The universal beam is approximately the length of the distance between the left and right main hooks, with a steering member 12 mounted on each side. The lower end of the upper sling rope and the upper end of the lower sling rope are attached to the steering member, respectively. For example, the steering member includes a fixed sleeve with a connecting lug hinged to at least one end of the fixed sleeve. The corresponding sling ropes are hinged to the connecting lug via a hinge axis. Lower sling ropes connected to the truss beam are symmetrically provided at both ends of the universal beam. The balance beam consists of an upper balance beam and a lower balance beam. A connecting arm is provided at the top of the lower balance beam, which is hinged to the upper balance beam via an axis.

[0030] The angles of the upper balancing beam and the lower balancing beam can be adjusted relative to each other in the vertical direction. An upper bevel 15 is provided at the lower part of the upper balancing beam, and a lower bevel 16 is provided at the upper part of the lower balancing beam to avoid interference caused by a small amount of floating between the upper balancing beam and the lower balancing beam in the vertical direction. When the upper balancing beam and the lower balancing beam float greatly in the vertical direction, contact will be formed, which will play a limiting role and limit the floating range between the upper balancing beam and the lower balancing beam.

[0031] The upper and lower balancing beams are each equipped with two shaft-threading devices for attaching slings. The balancing beam is suspended from the two main hooks on the right side via two 5m slings, while two high-strength looped slings (B) are attached to the lower balancing beam. The lower slings are looped, high-strength slings. Their high load capacity and light weight facilitate on-site installation. The two universal beams are connected on the left side by a connecting beam, and the lower slings are connected to a lightweight truss beam. The truss structure significantly reduces the weight of the rigging while ensuring lifting strength.

[0032] The lifting connection mechanism is mainly composed of two upper pressure beams, four slings and two supporting beam mechanisms. The upper pressure beams are respectively mounted on the left and right sides of the truss beam through slings. A sling is installed in front and behind each upper pressure beam. The slings are made of galvanized steel wire and have the characteristics of large load and strong flexibility, which is convenient for lifting and hooking. The bottom of the sling is connected to the supporting beam mechanism 10. An anti-slip plate is set at the connection position between the supporting beam mechanism and the sling to prevent the supporting beam mechanism from being unhooked during lifting.

[0033] In an optional embodiment, a sling control mechanism 13 is also provided on the upper pressure beam. The sling control mechanism includes a generator 130, a winch 131, a distribution box, an electric hoist 132, a pulley block 133, and a rope splitter 9, which is mainly used to control the hooking and unhooking of the sling. The generator is installed in the middle position of the upper pressure beam on the right side. A winch is provided in front and behind each upper pressure beam. The wire rope below the winch is connected to the rope splitter. The rope splitter on each side is connected to two lifting ears on the support beam mechanism. Each winch is equipped with a distribution box for remotely controlling the winch to lift and lower the support beam mechanism to complete the hooking and unhooking. An electric hoist is installed in front and behind the upper pressure beam, connected to the bottom of the sling through the rope. A pulley block is provided at the top for threading the rope. By loosening and tightening the electric hoist, the sling is bent outward, so that the bottom of the sling is separated from the connection with the support beam mechanism, completing the hooking and unhooking of the sling.

[0034] The present invention meets the requirements of hoisting prefabricated box girders with ultra-large spans and large tonnages. The overall hoisting design is a "four-point vertical hoisting, three-point self-balancing" adaptive longitudinal slope light truss hoisting structure. During the hoisting process, the forces on the four points of the prefabricated box girder can be automatically balanced, while meeting the hoisting conditions of parallel state and maximum longitudinal slope of 2.5%. By designing a multifunctional mechanical automatic locking sling device, the problems of longitudinal slope installation balance and sling stability of the prefabricated box girder are solved, and the sling anti-unhooking, anti-overloading and automatic locking are realized to ensure the stability of the entire hoisting process. At the same time, the sling is designed with a remote control system for disassembly of the sling, which solves the problem of difficult disassembly of the beam support mechanism and improves the overall safety of the construction.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A long prefabricated component lifting sling, characterized by: It includes two universal beams and two truss beams. The two universal beams are connected by a connecting beam. Both ends of the universal beam are respectively provided with lower lifting ropes connected to the truss beam. The upper side of the universal beam is provided with a balance adjustment mechanism, and the lower side of the truss beam is provided with a lifting connection mechanism; the balance adjustment mechanism includes a balance beam, the upper side of the balance beam is provided with a top lifting rope, and the lower side is provided with an upper lifting rope; the lifting connection mechanism includes an upper pressure beam, the upper side of the upper pressure beam is provided with a bottom lifting rope, and the lower side is provided with a lifting rope.

2. The long prefabricated component lifting sling according to claim 1, characterized in that: A joist mechanism is provided at the lower end of the sling.

3. The long prefabricated component lifting sling according to claim 1, characterized in that: Both ends of the universal beam are respectively provided with steering pieces, and the lower end of the upper side lifting rope and the upper end of the lower side lifting rope are respectively installed on the steering pieces.

4. The long prefabricated component lifting sling according to claim 1, characterized in that: Both ends of the universal beam are symmetrically provided with lower side suspension ropes connected with the truss beam.

5. The long prefabricated component lifting sling according to claim 1, characterized in that: The balance beam comprises a balance upper beam and a balance lower beam. A connecting arm is provided on the upper portion of the balance lower beam, and the connecting arm is hinged to the balance upper beam through an axis.

6. The long prefabricated component lifting sling according to claim 5, characterized in that: An upper oblique section is provided on the lower portion of the balancing upper beam, and a lower oblique section is provided on the upper portion of the balancing lower beam.

7. The long prefabricated component lifting sling according to claim 1, characterized in that: The lower side lifting rope adopts circular high-strength lifting rope.

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