Steel box girder hoisting device for bridge construction

Abstract

The utility model relates to the technical field of bridge construction, and particularly discloses a steel box girder hoisting device for bridge construction, which comprises a hoisting ring, a traction chain relatively connected to the lower end of the hoisting ring, and a limiting mechanism arranged at the lower end of the traction chain and used for hoisting and supporting a box girder, at least two limiting mechanisms are arranged and comprise supporting frames, left and right spiral lead screws are arranged on the supporting frames in a penetrating mode, hand wheels are fixed to the two ends of the left and right spiral lead screws, and sliding seats are arranged on the left and right spiral lead screws and located in the supporting frames. Through the arrangement of the limiting mechanism, the relative positions of the sliding seats are adjusted in the rotating process of the left spiral lead screw and the right spiral lead screw, bending arms of the L-shaped supporting rods are located on the lower sides of side wings on the two sides of the box girder, meanwhile, the positions between the L-shaped supporting rods are fixed through the connecting assemblies, and when the whole box girder is hoisted, the L-shaped supporting rods stably limit and fix the box girder; and the whole device is suitable for box girders of different specifications, supporting and limiting are conveniently conducted on lifting of the box girders, and using convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a steel box girder hoisting device for bridge construction. Background Art

[0002] Steel box beams, also known as steel plate box beams, are a common structural form for large-span bridges. They are generally used on bridges with larger spans. Due to the large weight and volume of steel box beams, they usually need to be hoisted by crane during installation and construction. When using existing hoisting devices, they are mainly tied and fixed at both ends of the box beam by steel wire ropes, which is inconvenient to fix and limit. After the box beam is placed, it is inconvenient to remove the steel wire ropes, which causes inconvenience in use. Utility Model Content

[0003] The purpose of the utility model is to provide a steel box girder hoisting device for bridge construction in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A steel box girder hoisting device for bridge construction includes a lifting ring, a traction chain is relatively connected to the lower end of the lifting ring, and also includes a limiting mechanism arranged at the lower end of the traction chain for lifting and supporting the box girder; the limiting mechanism is arranged at least in two places, and the limiting mechanism includes a support frame, a left and a right spiral screw are passed through the support frame, hand wheels are fixed at both ends of the left and right spiral screws, a slide seat is arranged on the left and right spiral screws and located in the support frame, an L-shaped support rod is arranged at the lower end of the slide seat, and a connecting component is arranged on the L-shaped support rod.

[0006] Further configuration: the connecting component includes a fixed screw rod arranged on one of the L-shaped support rods, a sleeve is arranged at the end of the fixed screw rod, a movable screw rod is arranged at the other end of the sleeve, and a limiting buckle is arranged at the end of the movable screw rod.

[0007] It is further arranged that the threads on the fixed screw rod and the movable screw rod are in opposite directions, and the sleeve is threadedly connected with the fixed screw rod and the movable screw rod.

[0008] Further configuration: a limit shaft is arranged on the outer wall of the L-shaped support rod, the fixing screw rod is rotationally connected to the L-shaped support rod through the limit shaft, and the limit buckle is movably connected to the limit shaft on another L-shaped support rod.

[0009] Further configuration: a slide groove is arranged on the support frame, the slide seat is slidably connected to the support frame, the left and right spiral screws are threadedly connected to the slide seat, and the left and right spiral screws are rotatably connected to the support frame.

[0010] Further configuration: the L-shaped support rod is rotatably connected to the slide seat, and the bending arms of the L-shaped support rod are relatively arranged.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] By setting the limiting mechanism, the relative position of the slide is adjusted during the rotation of the left and right spiral screws, and the bending arms of the L-shaped support rods are located on the lower sides of the flanks on both sides of the box beam. At the same time, the positions of the L-shaped support rods are fixed by connecting components. When the box beam is lifted as a whole, the L-shaped support rods can stably limit and fix the box beam, making the whole body adaptable to the use of box beams of different specifications, facilitating the support and limiting of the box beam lifting, and improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is an axonometric diagram of a steel box girder hoisting device for bridge construction described in the utility model;

[0015] Figure 2 It is a right side structural schematic diagram of a steel box girder hoisting device for bridge construction described in the utility model;

[0016] Figure 3 It is a structural schematic diagram of a limiting mechanism of a steel box girder hoisting device for bridge construction described in the utility model in a partially exploded state;

[0017] Figure 4 yes Figure 3 Schematic diagram of the structure in another state.

[0018] The following are the descriptions of the reference numerals:

[0019] 1. Lifting ring; 2. Traction chain; 3. Limiting mechanism; 31. Support frame; 32. Left and right spiral screws; 33. Sliding seat; 34. L-shaped support rod; 35. Handwheel; 36. Fixed screw; 37. Sleeve; 38. Movable screw; 39. Limiting buckle. DETAILED DESCRIPTION

[0020] In the description of the present utility model, 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] like Figure 1-Figure 4 As shown, a steel box girder hoisting device for bridge construction includes a lifting ring 1 for fixed connection with a crane, a traction chain 2 is relatively connected to the lower end of the lifting ring 1, and also includes a limiting mechanism 3 arranged at the lower end of the traction chain 2 for lifting and supporting the box girder;

[0024] The cam 33 is provided with a plurality of handles 35, the handles 36 are provided with a plurality of handles 37, and the handles 38 are provided with a plurality of handles 39. The handles 39 are provided with a plurality of handles 31.

[0025] The L-shaped support rod 34 is provided with a connection assembly, which includes a fixed screw 36 provided on one of the L-shaped support rods 34, a sleeve 37 provided at the end of the fixed screw 36, a movable screw 38 provided at the other end of the sleeve 37, and a limit buckle 39 provided at the end of the movable screw 38. The thread directions of the fixed screw 36 and the movable screw 38 are opposite, and the sleeve 37 is threadedly connected with the fixed screw 36 and the movable screw 38; a limit axis is provided on the outer wall of the L-shaped support rod 34, the fixed screw 36 is rotatably connected with the L-shaped support rod 34 through the limit axis, and the limit buckle 39 is movably connected with the limit axis on the other L-shaped support rod 34, and the length of the movable screw 38 and the fixed screw 36 is adapted to the spacing between the L-shaped support rods 34 through the rotation of the sleeve 37, and the limit buckle 39 is buckled on the limit axis on the L-shaped support rod 34, so as to limit the relative position of the L-shaped support rod 34.

[0026] The working principle and use process of the utility model are as follows: the crane is connected to the lifting ring 1, and the whole is lifted to the upper side of the box beam. The hand wheels 35 at the ends of the left and right spiral screws 32 are rotated, so that the positions of the slide seats 33 are relatively adjusted during the rotation of the left and right spiral screws 32. The bending arms of the L-shaped support rods 34 are located on the lower sides of the flanks on both sides of the box beam. Through the rotation of the sleeve 37, the lengths of the movable screw rods 38 and the fixed screw rods 36 are adapted to the spacing between the L-shaped support rods 34, which plays a limiting role on the L-shaped support rods 34. The crane is used to lift the whole upward, and the L-shaped support rods 34 support both sides of the box beam for lifting. After the box beam is placed in place, the L-shaped support rods 34 can be rotated outward to be detached from the box beam, thereby improving the convenience of use.

[0027] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A steel box girder hoisting device for bridge construction, comprising a hoisting ring (1), wherein the lower end of the hoisting ring (1) is relatively connected to a traction chain (2), characterized in that: It also includes a limiting mechanism (3) arranged at the lower end of the traction chain (2) for supporting the box girder during lifting; the limiting mechanism (3) is arranged at least at two locations, and the limiting mechanism (3) includes a support frame (31), a left and right spiral screw (32) is passed through the support frame (31), hand wheels (35) are fixed at both ends of the left and right spiral screws (32), a slide seat (33) is arranged on the left and right spiral screws (32) and located inside the support frame (31), an L-shaped support rod (34) is arranged at the lower end of the slide seat (33), and a connecting component is arranged on the L-shaped support rod (34).

2. The steel box girder hoisting device for bridge construction according to claim 1, characterized in that: The connection assembly comprises a fixed screw rod (36) arranged on one of the L-shaped support rods (34), a sleeve (37) being arranged at the end of the fixed screw rod (36), a movable screw rod (38) being arranged at the other end of the sleeve (37), and a limit buckle (39) being arranged at the end of the movable screw rod (38).

3. The steel box girder hoisting device for bridge construction according to claim 2 is characterized in that: The threads on the fixed screw rod (36) and the movable screw rod (38) are in opposite directions, and the sleeve (37) is threadedly connected to the fixed screw rod (36) and the movable screw rod (38).

4. The steel box girder hoisting device for bridge construction according to claim 2, characterized in that: A limiting shaft is arranged on the outer wall of the L-shaped support rod (34); the fixing screw rod (36) is rotatably connected to the L-shaped support rod (34) via the limiting shaft; and the limiting buckle (39) is movably connected to a limiting shaft on another location of the L-shaped support rod (34).

5. The steel box girder hoisting device for bridge construction according to claim 1, characterized in that: The support frame (31) is provided with a slide groove, the slide seat (33) is slidably connected to the support frame (31), the left and right spiral screws (32) are threadedly connected to the slide seat (33), and the left and right spiral screws (32) are rotationally connected to the support frame (31).

6. The steel box girder hoisting device for bridge construction according to claim 1, characterized in that: The L-shaped support rod (34) is rotatably connected to the slide seat (33), and the bending arms of the L-shaped support rod (34) are arranged opposite to each other.

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