Simple device for hoisting and walking prefabricated box girder bottom web steel reinforcement framework

Abstract

The utility model discloses a simple device for hoisting and walking of a prefabricated box girder bottom web steel reinforcement framework, and relates to the technical field of highway bridge construction, in particular to the simple device for hoisting and walking of the prefabricated box girder bottom web steel reinforcement framework, which comprises a main beam, and a connecting steel pipe is welded on the lower surface of the main beam. A supporting steel pipe is welded to the bottom of one end of the connecting steel pipe, a transverse supporting steel pipe is welded to the bottom end of the supporting steel pipe, and bottom main steel pipes are welded to the two ends of the transverse supporting steel pipe. When the device is used, after steel bars, corrugated pipes and other components are installed on a prefabricated box girder bottom web steel bar moulding bed frame, the device is hung to the proper position of the top of the moulding bed frame through a gantry crane, at the moment, the hanging rings are inserted into web stirrup gaps, and then the supporting insertion rods used circularly penetrate into the web stirrup gaps; the web stirrup is supported through cooperation of the supporting insertion rods and the lifting rings, follow-up lifting is facilitated, stress at all positions is more uniform, and therefore the situation that a web stirrup framework is loosened and deformed due to uneven stress is avoided.

Description

Technical Field

[0001] This utility model relates to the field of highway bridge construction technology, specifically a simple device for lifting and moving the steel reinforcement cage of the bottom web of a precast box girder. Background Technology

[0002] The reinforcing steel cage in the bottom web of a precast box girder refers to the steel reinforcement framework used in the bottom web portion during the manufacturing of precast box girders. Precast box girders are widely used in bridge construction, and their bottom web reinforcing steel cage is mainly used to enhance the strength and load-bearing capacity of the structure.

[0003] During the hoisting of the precast box girder steel reinforcement cage, the use of traditional hoisting equipment or simple hoisting frames is not ideal. The steel reinforcement cage is prone to uneven stress and deformation. Furthermore, the use of simple frames can easily lead to tilting or even damage to the precast box girder steel reinforcement cage. Utility Model Content

[0004] The purpose of this utility model is to provide a simple device for lifting and moving the reinforcing steel skeleton of the bottom web of a precast box girder. By setting up a main beam, connecting steel pipe, supporting steel pipe, cross bracing steel pipe and bottom main steel pipe, it solves the problems that when using traditional lifting equipment or simple lifting frames during the lifting of the reinforcing steel skeleton of a precast box girder, the effect is not ideal, the reinforcing steel skeleton is easily deformed due to uneven stress, and the simple frame is also prone to tilting or even damage to the reinforcing steel skeleton of the precast box girder.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a simple device for lifting and moving the reinforcing steel skeleton of the bottom web of a precast box girder, comprising a main beam, a connecting steel pipe welded to the lower surface of the main beam, a supporting steel pipe welded to the bottom of one end of the connecting steel pipe, a cross bracing steel pipe welded to the bottom end of the supporting steel pipe, and bottom main steel pipes welded to both ends of the cross bracing steel pipe.

[0006] Preferably, a lifting ring is welded to the surface of the bottom main steel pipe, and a lifting ring is engaged inside the lifting ring.

[0007] Preferably, a support rod is inserted into the inside of the lifting ring, and a lower inclined bracing steel pipe is welded between the bottom main steel pipes.

[0008] Preferably, a diagonal bracing square steel is welded to one side of the bottom main steel pipe, and the top end of the diagonal bracing square steel is welded to the surface of the connecting steel pipe.

[0009] Preferably, a rope clip is welded to the surface of one of the cross bracing steel pipes, and a nylon rope is wound around the surface of the rope clip, with a handle fixedly connected to one end of the nylon rope.

[0010] Preferably, flanges are welded to both ends of the main beam, and multiple lifting rings are welded to the surface of the main beam.

[0011] This utility model provides a simple device for lifting and moving the steel reinforcement cage of the bottom web of a precast box girder, which has the following beneficial effects:

[0012] In use, after the reinforcement and corrugated pipe components are installed on the precast box girder bottom web reinforcement formwork, the device is hoisted to a suitable position on the top of the formwork using a gantry crane. The lifting ring is then inserted into the gaps in the web stirrups, followed by the insertion of a circulating support rod. The support rod, in conjunction with the lifting ring, supports the web stirrups, facilitating subsequent lifting and ensuring more even stress distribution. This prevents uneven stress on the web stirrup skeleton, which could lead to loosening and deformation. The triangular shape of the device allows for stable installation of the reinforcement skeleton below, preventing tilting and damage. Workers can pull on the handle attached to the end of the device to reach a certain height and then begin moving. Once above the assembled box girder bottom and side formwork platforms, the position of the reinforcement skeleton on the device is controlled and adjusted using nylon ropes and the handle. The reinforcement skeleton is then lowered to the appropriate position, completing the movement. This device has a simple structure, long reusability, low manufacturing cost, fast construction progress, good stability, high installation efficiency, and high safety performance. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a bottom view of the structure of this utility model;

[0016] Figure 3 This is a front view schematic diagram of the structure of this utility model;

[0017] Figure 4 This is a structural breakdown diagram of the lifting ring clip of this utility model.

[0018] The image shows:

[0019] 1. Main beam; 2. Connecting steel pipe; 3. Supporting steel pipe; 4. Horizontal bracing steel pipe; 5. Bottom main steel pipe; 6. Lifting ring clamp; 7. Lifting ring; 8. Support rod; 9. Lower diagonal bracing steel pipe; 10. Diagonal bracing square steel; 11. Rope clamp; 12. Nylon rope; 13. Pull handle; 14. Flange; 15. Door lifting ring. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes a simple device for lifting and moving the reinforcing steel skeleton of the bottom web of a precast box girder. It includes a main beam 1, which is made of hollow steel pipe with an outer diameter of 165mm. A connecting steel pipe 2 is welded to the lower surface of the main beam 1. A hoop is welded to the surface of the connecting steel pipe 2, which fits onto the surface of the main beam 1 to increase stability and prevent the connecting steel pipe 2 from being pulled off. A supporting steel pipe 3 is welded to the bottom of one end of the connecting steel pipe 2. A cross brace steel pipe 4 is welded to the bottom end of the supporting steel pipe 3. Bottom main steel pipes 5 are welded to both ends of the cross brace steel pipe 4. A simple triangular support is formed by the supporting steel pipe 3 and the cross brace steel pipe 4.

[0023] The surface of the bottom main steel pipe 5 is welded with a lifting ring clip 6, and a lifting ring 7 is inserted inside the lifting ring clip 6. The position of the lifting ring 7 can be restricted by the lifting ring clip 6 to avoid displacement during the hoisting process, which would lead to poor stability. The lifting ring 7 can be inserted into the steel reinforcement cage, and its position can be flexibly arranged.

[0024] A support rod 8 is inserted inside the lifting ring 7. The lifting ring 7 and the steel reinforcement cage are assembled through the support rod 8, so that when multiple lifting rings 7 move upward, they evenly drive the steel reinforcement cage at each position to lift steadily, thereby improving stability and making the steel reinforcement cage more evenly stressed. A lower inclined steel pipe 9 is welded between the bottom main steel pipes 5, and a diagonal square steel 10 is welded to one side of the bottom main steel pipe 5. The top of the diagonal square steel 10 is welded to the surface of the connecting steel pipe 4. The lower inclined steel pipe 9 and the diagonal square steel 10 enhance the stability of the overall equipment and prevent deformation during use.

[0025] One of the cross bracing steel pipes 4 has a rope clamp 11 welded to its surface. A nylon rope 12 is wrapped around the surface of the rope clamp 11. One end of the nylon rope 12 is fixedly connected to a pull handle 13. The rope clamp 11 can be welded to one end of the equipment. Personnel can fine-tune the position and angle of the hoisted steel reinforcement frame by pulling the pull handle 13 at one end of the nylon rope 12 to avoid collisions with the surroundings during placement, which could damage the steel reinforcement frame.

[0026] Flanges 14 are welded to both ends of the main beam 1, allowing personnel to connect two pieces of equipment through the flanges 14, thus accommodating steel reinforcement cages of different lengths and sizes. Multiple gantry crane rings 15 are welded to the surface of the main beam 1, which are connected to the gantry crane. Under the action of the gantry crane, the steel reinforcement cage below the equipment is lifted and moved.

[0027] Specifically, this simple device for lifting and moving the reinforcing steel skeleton of the bottom web of precast box girders operates as follows: After the reinforcing steel bars and corrugated pipes are installed on the precast box girder bottom web reinforcing steel formwork, the device is hoisted to a suitable position at the top of the formwork using a gantry crane. Then, the lifting ring 7 is inserted into the gaps in the web stirrups, followed by the insertion of the circulating support rod 8. The support rod 8, in conjunction with the lifting ring 7, supports the web stirrups, facilitating subsequent lifting and ensuring more even stress distribution. This prevents uneven stress on the web stirrup skeleton, which could lead to loosening and deformation. Furthermore, this device is triangular in shape. The top gantry ring 15 can be used in conjunction with the gantry crane to keep the lower steel reinforcement skeleton stable, preventing tilting and damage. Workers can pull the handle 13 attached to the end of the equipment to reach a certain height and then start walking. When they reach the top of the assembled box girder bottom formwork and side formwork platform, they stop. The position of the steel reinforcement skeleton on the adjustment device is controlled by the nylon rope 12 and the handle 13. The steel reinforcement skeleton is then lowered to the appropriate position, completing the walking and transfer. The device has a simple structure, long reusability, low manufacturing cost, fast construction progress, good stability, high installation efficiency, and high safety performance.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple device for lifting and moving the reinforcing steel cage of the bottom web of a precast box girder, comprising a main beam (1), characterized in that: The lower surface of the main beam (1) is welded with a connecting steel pipe (2), a supporting steel pipe (3) is welded to the bottom of one end of the connecting steel pipe (2), a cross bracing steel pipe (4) is welded to the bottom end of the supporting steel pipe (3), and a bottom main steel pipe (5) is welded to both ends of the cross bracing steel pipe (4).

2. A simple device for lifting and moving the reinforcing steel cage of the bottom web of a precast box girder according to claim 1, characterized in that: The bottom main steel pipe (5) is welded with a lifting ring clip (6), and a lifting ring (7) is engaged inside the lifting ring clip (6).

3. A simple device for lifting and moving the reinforcing steel cage of the bottom web of a precast box girder according to claim 2, characterized in that: A support rod (8) is inserted inside the lifting ring (7), and a lower inclined steel pipe (9) is welded between the bottom main steel pipes (5).

4. A simple device for lifting and moving the reinforcing steel cage of the bottom web of a precast box girder according to claim 1, characterized in that: One side of the bottom main steel pipe (5) is welded with a diagonal bracing square steel (10), and the top of the diagonal bracing square steel (10) is welded to the surface of the connecting steel pipe (2).

5. A simple device for lifting and moving the reinforcing steel cage of the bottom web of a precast box girder according to claim 1, characterized in that: One of the cross bracing steel pipes (4) has a rope clip (11) welded to its surface. A nylon rope (12) is wrapped around the surface of the rope clip (11). One end of the nylon rope (12) is fixedly connected to a pull handle (13).

6. A simple device for lifting and moving the reinforcing steel cage of the bottom web of a precast box girder according to claim 1, characterized in that: Flanges (14) are welded to both ends of the main beam (1), and multiple door rings (15) are welded to the surface of the main beam (1).

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