Lifting appliance capable of adjusting balance of bridge deck slab

Abstract

The utility model relates to a lifting appliance capable of adjusting the balance of a bridge deck slab, which comprises a lifting beam, a plurality of fixed pulleys and a movable pulley, steel wire ropes are fixedly mounted on two sides of the top of the lifting beam, positioning holes for mounting the fixed pulleys are uniformly formed in a slab body of the lifting beam, and the fixed pulleys are mounted in the lifting beam. The fixed pulley is in transmission connection with a movable pulley through a traction rope; a lifting hook is hung on the movable pulley. According to the utility model, the pulley block is arranged in the lifting beam and is used for balancing the stress of the bridge deck slab, so that each lifting position is uniformly stressed, the bridge deck slab can be prevented from inclining after the stress of the bridge deck slab is balanced, the risk that a steel wire rope at a certain lifting position is snapped is also prevented, and the occurrence of safety accidents is prevented; therefore, the bridge deck slab prefabricated part can be better hoisted and conveyed.

Description

Technical Field

[0001] This utility model relates to the field of concrete precast component hoisting technology, and in particular to an adjustable bridge deck balance hoist. Background Technology

[0002] Bridge deck panels, as common precast concrete components, are mainly laid on the top of bridges. Multiple panels are then connected together by pouring concrete at pre-defined locations. After connection, a layer of concrete structure is laid on top, followed by an asphalt layer, to complete the bridge deck construction. Because bridge deck panels are very heavy, large lifting equipment is required for hoisting, especially in the production workshop. They are not only hoisted to designated locations after being cast as a single unit for storage, but also during sales and transportation.

[0003] However, current lifting equipment typically uses two hooks or one hook to lift the bridge deck as a whole. When dealing with long bridge decks, the deck is prone to tilting, especially when the structures on both sides of the bridge deck are different. The tilted lifting will increase the load on the wire rope. If the heavier side of the bridge deck breaks due to the excessive tension of the wire rope, it will cause a serious safety accident. Therefore, designing a lifting equipment that can balance the bridge deck is of great practical value. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable bridge deck balance lifting device to solve the problems encountered in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An adjustable bridge deck balance lifting device includes a lifting beam, fixed pulleys and movable pulleys. Steel wire ropes are fixedly installed on both sides of the top of the lifting beam. Positioning holes for installing the fixed pulleys are evenly opened on the plate of the lifting beam. Multiple fixed pulleys are installed inside the lifting beam. The fixed pulleys are connected to the movable pulleys through the pull ropes. Hooks are hung on the movable pulleys.

[0007] In the above scheme, the lifting beam has two beams, and anchoring components are installed on both sides of its top. The anchoring components are generally long trapezoidal structures, and the two lifting beams are fixedly connected to both sides of the anchoring components. As a preferred embodiment, the top of the anchoring component is provided with an anchoring head facing the direction of the wire rope tension, and the working end of the anchoring head is fixedly connected to the wire rope through a rope lock.

[0008] In the above scheme, the lifting beam includes side plates, and the fixed pulleys are installed between the two side plates through positioning holes and a rotating shaft. As a preferred embodiment, at both ends of the lifting beam, one of the fixed pulleys is connected to a movable pulley via a pull rope; at the middle of the lifting beam, two fixed pulleys are connected to a movable pulley via a pull rope, and the two fixed pulleys are spaced apart on the positioning holes in the side plates.

[0009] In another embodiment, an adjustable bridge deck balance lifting device includes a lifting beam, a fixed pulley and a movable pulley, and a bottom formwork with lifting rings installed at equal intervals on the bottom formwork.

[0010] The bottom mold is uniformly equipped with demolding top plates, and a pad is installed in the demolding top plate. The bottom of the lifting ring is threadedly connected to both the demolding top plate and the pad. In practice, a sleeve is vertically fixed to the middle of the pad, and the rod of the lifting ring is located inside the sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses pulley blocks installed in the lifting beam to balance the force on the bridge deck, so that the force is evenly distributed at each lifting position. After balancing the force on the bridge deck, it can prevent the bridge deck from tilting and also prevent the risk of the wire rope breaking at a certain lifting position, thus preventing safety accidents. Therefore, this utility model can better carry out the lifting and transportation of prefabricated bridge deck components. Attached Figure Description

[0012] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the installation structure of the central lifting beam and pulley block;

[0015] Figure 3 This is a side view of the present invention;

[0016] Figure 4 for Figure 3 Schematic diagram of the installation structure of the central lifting beam and pulley block;

[0017] Figure 5 This is a schematic diagram of the bottom mold structure of this utility model;

[0018] Figure 6 This is a schematic diagram of the installation of the lifting ring of this utility model in the bottom mold.

[0019] The following numbers are labeled in the diagram: 1-Lifting beam; 11-Anchoring component; 12-Wire rope; 13-Rope lock; 14-Positioning hole; 15-Side plate; 16-Bolt; 2-Fixed pulley; 21-Pull rope; 22-Rotating shaft; 3-Moving pulley; 31-Hook; 4-Bottom mold; 41-Demolding top plate; 42-Pad plate; 43-Sleeve; 44-Positioning screw; 45-Lifting ring; 46-Clamping block. Detailed Implementation

[0020] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0021] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0022] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Example 1, such as Figures 1 to 4 As shown, an adjustable bridge deck balance lifting device includes a lifting beam 1, a fixed pulley 2, and a movable pulley 3, wherein the connection of the fixed pulley 2 and the movable pulley 3 constitutes a pulley block. Steel wire ropes 12 are fixedly installed on both sides of the top of the lifting beam 1, and these steel wire ropes 12 are used to hang on the hooks of the electric hoist of the overhead crane. The lifting beam 1 has two beams, and anchoring elements 11 are installed on both sides of its top. The anchoring elements 11 are generally long, trapezoidal structures, which can reinforce the connection part and give it a higher load-bearing capacity.

[0024] Two lifting beams 1 are fixedly connected to both sides of the anchoring member 11. Pulley blocks are installed on each of the two lifting beams 1, which can distribute the load-bearing capacity of the precast bridge deck components, balance the lifting position of the bridge deck, and ensure more even force distribution during lifting. As a preferred embodiment, the top of the anchoring member 11 is provided with an anchor head facing the pulling direction of the wire rope 12. The anchor head mainly clamps a section of wire cable, which is then fixed to the wire rope 12 via a rope lock 13. Therefore, fixing the working end of the anchor head to the wire rope 12 via the rope lock 13 further reinforces the connection portion of the wire rope 12.

[0025] The lifting beam 1 has evenly spaced positioning holes 14 for installing fixed pulleys 2. These holes allow for the installation of fixed pulleys 2 as needed, enabling the lifting device to adapt to bridge decks of different lengths and balancing the lifting process. Multiple fixed pulleys 2 are installed inside the lifting beam 1. These fixed pulleys 2 are connected to movable pulleys 3 via a pulley rope 21. Hooks 31 are mounted on the movable pulleys 3. The fixed pulleys 2 and movable pulleys 3 form a pulley system that balances the forces during the lifting of the bridge deck, ensuring even tension on the pulley rope 21 and maintaining a good lifting effect.

[0026] In implementation, the suspension beam 1 includes side plates 15. Fixed pulleys 2 are installed between the two side plates 15 via positioning holes 14 and rotating shafts 22. Depending on the structure of different bridge decks, the fixed pulleys 2 can be installed on the plate body of the suspension beam 1 according to the positioning holes 144 and rotating shafts 22, thus determining their position. The bottoms of the two side plates 15 are fixedly connected by bolts 15. Anchoring members 11 can be fixed by welding or by bolts 16.

[0027] As a preferred embodiment, at both ends of the lifting beam 1, a fixed pulley 2 is connected to a movable pulley 3 via a pull rope 21, and the end of the pull rope 21 is fixed to the plate body of the lifting beam 1. In the middle of the lifting beam 1, two fixed pulleys 2 are connected to the movable pulley 3 via pull ropes 21, and these two fixed pulleys 2 are spaced apart on the positioning holes 14 in the side plate 15, with the middle part used to suspend the movable pulley 3.

[0028] Example 2, based on Example 1, please refer to... Figure 5 and Figure 6 An adjustable bridge deck balance lifting device includes a lifting beam 1, a fixed pulley 2 and a movable pulley 3, and a bottom formwork 4. The bottom formwork 4 is a structure on the top surface of the bridge deck. Lifting rings 45 are installed at equal intervals on the bottom formwork 4, and the lifting hooks 31 are hung in the lifting rings 45 to facilitate the lifting of the bridge deck.

[0029] The bottom mold 4 has evenly spaced holes, and a demolding top plate 41 is welded and installed inside the holes. The demolding top plate 41 has a circular groove structure, and a pad 42 is installed inside the demolding top plate 41. The two are limited by a locking block 46. The thickness of the pad 42 is 6cm-10cm, and threaded holes are made in the middle of the pad 42 and the demolding top plate 41. The bottom of the lifting ring 45 is threaded to the demolding top plate 41 and the pad 42 respectively. The three are fixed together by mechanical thread connection. The tensile strength of a single lifting ring 45 is over 50t, which is conducive to the stable lifting of the bridge deck.

[0030] During implementation, a sleeve 43 is vertically fixed to the middle of the pad 42, and the joint is spot-welded for sealing. The rod of the lifting ring 45 is located inside the sleeve 43. To ensure that the rod of the lifting ring 45 is vertical to facilitate the lifting of the bridge deck, a 36mm diameter positioning screw 44 is installed in the threaded hole to prevent the sleeve 43 from tilting during pouring. After the shaping and curing are completed, the positioning screw 44 is removed, and then the lifting ring 45 is screwed into the threaded hole.

[0031] Based on the solutions of Embodiments 1 and 2, this utility model installs a pulley block in the lifting beam 1 to balance the force on the bridge deck, so that the force is evenly distributed at each lifting position. After balancing the force on the bridge deck, it can prevent the bridge deck from tilting and also prevent the risk of the wire rope breaking at a certain lifting position, thus preventing safety accidents. Therefore, this utility model can better carry out the lifting and transportation of prefabricated bridge deck components.

[0032] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lifting device for adjustable bridge deck balance, characterized in that: The system includes a lifting beam (1), a fixed pulley (2), and a movable pulley (3). Steel wire ropes (12) are fixedly installed on both sides of the top of the lifting beam (1). Positioning holes (14) for installing the fixed pulleys (2) are evenly opened on the plate of the lifting beam (1). Multiple fixed pulleys (2) are installed inside the lifting beam (1). The fixed pulleys (2) are connected to the movable pulleys (3) through a pulling rope (21). A hook (31) is hung on the movable pulley (3).

2. The adjustable bridge deck balance lifting device according to claim 1, characterized in that: The lifting beam (1) has two beams and anchors (11) are installed on both sides of its top. The anchors (11) are long trapezoidal structures and the two beams (1) are fixedly connected to both sides of the anchors (11).

3. The adjustable bridge deck balance lifting device according to claim 2, characterized in that: The top of the anchor (11) is provided with an anchor head facing the pulling direction of the wire rope (12), and the working end of the anchor head is fixedly connected to the wire rope (12) through a rope lock (13).

4. The adjustable bridge deck balance lifting device according to claim 1, characterized in that: The lifting beam (1) includes side plates (15), and the fixed pulley (2) is installed between the two side plates (15) through the positioning hole (14) and the rotating shaft (22).

5. The adjustable bridge deck balance lifting device according to claim 4, characterized in that: At both ends of the lifting beam (1), one of the fixed pulleys (2) is connected to the movable pulley (3) via a pull rope (21); in the middle of the lifting beam (1), two of the fixed pulleys (2) are connected to the movable pulley (3) via a pull rope (21), and the two fixed pulleys (2) are spaced apart on the positioning holes (14) in the side plate (15).

6. The adjustable bridge deck balance lifting device according to claim 1, characterized in that: It also includes a bottom mold (4), on which lifting rings (45) are installed at equal intervals.

7. The adjustable bridge deck balance lifting device according to claim 6, characterized in that: The bottom mold (4) is uniformly equipped with a demolding top plate (41), and a pad plate (42) is installed in the demolding top plate (41). The bottom of the lifting ring (45) is threadedly connected to the demolding top plate (41) and the pad plate (42) respectively.

8. The adjustable bridge deck balance lifting device according to claim 7, characterized in that: A sleeve (43) is vertically fixed in the middle of the pad (42), and the rod of the lifting ring (45) is located inside the sleeve (43).

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