Steel box girder segment connecting and fixing device

Abstract

The utility model discloses a kind of steel box girder segment connecting fixing devices, relate to steel structure building technical field, to solve the problem of the existing steel box girder segment field connection, difficult to align, efficiency is low and temporary fixation is unstable, poor safety problem.This device includes steel column, box corbel welded in steel column side and steel box girder to be connected, steel box girder top end head is fixed with rest plate, its technical scheme is to:still include the positioning mechanism fixed on box corbel;The positioning mechanism includes the positioning rod for guiding rest plate in position;Rest plate bottom is provided with a positioning slot compatible with positioning rod;Rest plate and positioning mechanism are also respectively provided with the limiting hole and limiting structure that can be provided with lock pin, for realizing temporary locking after rest plate in position.This utility model realizes quick guidance alignment and stable temporary locking in hoisting process by the structure cooperation of positioning mechanism and rest plate, significantly improves installation efficiency and construction safety.

Description

Technical Field

[0001] This utility model relates to the field of steel structure building technology, and in particular to a steel box girder segment connection and fixing device. Background Technology

[0002] In large steel structure buildings, especially bridges and high-rise buildings, steel box girders are critical load-bearing components. Steel box girders are usually prefabricated in sections in the factory and then transported to the construction site for high-altitude hoisting and splicing. During the splicing process, the ends of the steel box girder sections need to be precisely aligned with the corbels on the steel columns (or another section of the steel box girder) and temporarily fixed before the final welding work can be carried out.

[0003] Chinese utility model patent (publication number: CN218454467U) discloses a novel box-type steel beam node connection structure. This solution is very inspiring. By opening a reserved opening in the web of the box beam, it greatly facilitates workers to enter the box beam to weld the lower flange. It successfully avoids the overhead welding operation in traditional construction where the quality is difficult to guarantee, thus ensuring the quality of the weld and increasing the safety of the structure.

[0004] However, the aforementioned solution still has room for improvement in the temporary positioning and fixing stage. This solution involves welding a simple support plate to the top of the steel box girder, which is then placed directly on the corbel during hoisting. While this method provides vertical support, its alignment accuracy relies entirely on the operation of the lifting equipment and manual direction, making the process cumbersome and inefficient. Furthermore, the simple overlapping temporary fixing is not stable enough; the steel box girder may still sway before welding is completed, posing a certain safety hazard. Therefore, this application provides a steel box girder segment connection and fixing device to meet the requirements. Utility Model Content

[0005] The purpose of this application is to provide a steel box girder segment connection and fixing device, which aims to solve the problems of difficult alignment, low efficiency, unstable temporary fixing, and poor safety in the field connection of steel box girders in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: a steel box girder segment connection and fixing device, comprising a steel column, a box-shaped bracket welded to the side of the steel column, and a steel box girder to be connected, wherein at least two support plates are fixed to the top end of the steel box girder; and a positioning mechanism fixed to the box-shaped bracket; the positioning mechanism includes a positioning rod for guiding the support plates into position; a positioning groove adapted to the positioning rod is opened at the bottom of the support plate; a limiting hole for inserting a locking pin is opened on the support plate; and a limiting structure adapted to the limiting hole is provided on the positioning mechanism, for temporary locking by the locking pin inserted together with the limiting hole after the support plate is in position. This structural design realizes automatic guidance and rigid locking during the installation process, significantly improving work efficiency and safety.

[0007] Preferably, the positioning mechanism further includes a limiting plate fixedly connected to the positioning rod, and the limiting structure is a first limiting oblong hole formed on the limiting plate. This design is simple and can effectively achieve through-locking of the locking pin.

[0008] Preferably, the locking pin passes sequentially through the limiting hole of one of the supporting plates, the first limiting waist-shaped hole of the limiting plate, and the limiting hole of the other supporting plate, temporarily fixing the steel box girder to the box-shaped bracket. This locking method forms a stable triangular constraint, ensuring the reliability of the temporary fixation.

[0009] Preferably, the positioning mechanism is fixed to the upper flange plate of the box-shaped bracket by bolts. This connection method facilitates precise installation and adjustment of the positioning mechanism's position.

[0010] Preferably, the positioning mechanism has a second limiting slotted hole to prevent it from rotating on the surface of the box-shaped bracket and a threaded hole for precisely adjusting its installation position. The bolt passes through the second limiting slotted hole or the threaded hole to fix the positioning mechanism. This design further ensures the accuracy and stability of the positioning mechanism installation.

[0011] Preferably, the positioning groove is a U-shaped groove. The U-shaped groove has good guiding properties, making it easy for the shelf to slide quickly into the positioning rod.

[0012] Preferably, the shelf is also provided with through-holes for end welding operations. This design ensures that the device does not interfere with subsequent permanent welding operations.

[0013] In summary, the technical effects and advantages of this utility model are as follows: In this invention, by setting a positioning mechanism on the box-type bracket and setting a corresponding positioning groove on the support plate, the steel box girder can be automatically guided to the predetermined position when it is hoisted and approached, thus achieving rapid coarse positioning, greatly reducing the need for repeated fine-tuning of lifting equipment and manual labor, and improving installation efficiency.

[0014] In this invention, a through-type locking pin structure is used to rigidly lock the shelf plate and the positioning mechanism, forming a stable temporary fixation. This effectively prevents the steel box girder from shaking or shifting before welding is completed, significantly improving the safety of high-altitude operations. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the structure of the shelf of this utility model; Figure 4 This is a first-view structural schematic diagram of the positioning mechanism of this utility model; Figure 5 This is a second-view structural diagram of the positioning mechanism of this utility model.

[0017] In the diagram: 1. Stiffening rib; 2. Steel column; 3. Box bracket; 4. Side cover plate; 5. Steel box girder; 6. Support plate; 61. Limiting hole; 62. Positioning groove; 63. Welding hole; 7. Positioning mechanism; 71. Positioning rod; 72. Limiting plate; 73. First limiting slotted hole; 74. Second limiting slotted hole; 75. Threaded hole; 8. Bolt. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0019] refer to Figure 1-5The diagram illustrates a segmental connection and fixing device for a steel box girder, comprising a steel column 2, stiffening ribs 1 and box-shaped brackets 3 welded thereon, and a steel box girder 5 to be installed. The steel box girder 5 is formed by a web and upper and lower flanges.

[0020] As one embodiment of this invention, the device includes a support plate 6 fixed to the top of the steel box girder 5 and a positioning mechanism 7 fixed to the top of the box-type corbel 3.

[0021] In one embodiment of this invention, the support plate 6 is a steel plate with a U-shaped positioning groove 62 at its bottom for guidance and positioning. The plate also has a circular limiting hole 61 and a semi-circular welding hole 63 for end welding. Typically, two support plates 6 are symmetrically welded to the top of the ends of each steel box girder 5.

[0022] In one embodiment of this invention, the positioning mechanism 7 is a component that integrates positioning and locking functions. It includes a horizontally positioned positioning rod 71 and a limiting plate 72 perpendicular to the positioning rod 71. The limiting plate 72 has a first limiting oblique hole 73. The base of the positioning mechanism 7 also has a second limiting oblique hole 74 and a threaded hole 75, which are used to securely mount itself to the upper flange plate of the box-type bracket 3 by bolts 8.

[0023] The working principle of this practical application is as follows: 1. Prefabrication stage: In the factory or on the ground, the support plate 6 is welded to the top end of the steel box girder 5 in the predetermined position; at the same time, the positioning mechanism 7 is precisely installed on the box-shaped bracket 3 of the steel column 2 by bolts 8.

[0024] 2. Lifting and Alignment Stage: Use lifting equipment to lift the steel box girder 5 to the installation position. When the steel box girder 5 is lowered and close to the box bracket 3, the operator only needs to roughly align it, and the U-shaped positioning groove 62 at the bottom of the support plate 6 will contact the positioning rod 71 of the positioning mechanism 7. Under the action of gravity, the positioning groove 62 will automatically slide in along the positioning rod 71, thereby achieving fast and accurate horizontal alignment.

[0025] 3. Temporary locking stage: After the two support plates 6 are fully seated on the positioning rod 71, the limiting holes 61 on their bodies will be roughly aligned with the first limiting waist-shaped hole 73 of the upper limit plate 72 of the positioning mechanism 7. At this time, the operator will insert a locking pin (such as a thick steel bar or a special pin) through the limiting hole 61 of the first support plate 6, the first limiting waist-shaped hole 73 of the limiting plate 72, and the limiting hole 61 of the second support plate 6 in sequence, so that the steel box girder 5 can be firmly locked onto the box bracket 3.

[0026] 4. Welding Stage: After the device provides stable and reliable temporary fixation, welding operations can be carried out on the upper and lower flange plates and web plates of the box-type bracket 3 and the steel box girder 5. The welding operation can use existing technology, such as reserving manholes in the web plate and setting side cover plates 4 to facilitate welders to enter the interior to weld the lower flange.

[0027] The electromechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments; they are common knowledge.

[0028] Components not described in detail in this article are existing technologies.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A segmental connection and fixing device for a steel box girder, comprising a steel column (2), a box-type bracket (3) welded to the side of the steel column (2), and a steel box girder (5) to be connected, wherein at least two support plates (6) are fixed to the top end of the steel box girder (5), characterized in that: It also includes a positioning mechanism (7) fixed to the box-shaped bracket (3); The positioning mechanism (7) includes a positioning rod (71) for guiding the shelf (6) into place; The bottom of the shelf (6) is provided with a positioning groove (62) that is compatible with the positioning rod (71); The shelf (6) has a limiting hole (61) for inserting a locking pin. The positioning mechanism (7) has a limiting structure that matches the limiting hole (61). After the shelf (6) is in place, the locking pin is inserted together with the limiting hole (61) to achieve temporary locking.

2. The steel box girder segment connection and fixing device according to claim 1, characterized in that: The positioning mechanism (7) also includes a limiting plate (72) fixedly connected to the positioning rod (71), and the limiting structure is a first limiting waist-shaped hole (73) opened on the limiting plate (72).

3. The steel box girder segment connection and fixing device according to claim 2, characterized in that: The locking pin passes through the limiting hole (61) of one of the mounting plates (6), the first limiting waist-shaped hole (73) of the limiting plate (72), and the limiting hole (61) of the other mounting plate (6) in sequence, temporarily fixing the steel box girder (5) to the box-shaped bracket (3).

4. The steel box girder segment connection and fixing device according to claim 1, characterized in that: The positioning mechanism (7) is fixed to the upper flange plate of the box-shaped bracket (3) by bolts (8).

5. The steel box girder segment connection and fixing device according to claim 4, characterized in that: The positioning mechanism (7) has a second limiting waist-shaped hole (74) for preventing it from rotating on the surface of the box-shaped bracket (3) and a threaded hole (75) for precisely adjusting its installation position. The bolt (8) passes through the second limiting waist-shaped hole (74) or the threaded hole (75) to fix the positioning mechanism (7).

6. The steel box girder segment connection and fixing device according to claim 1, characterized in that: The positioning groove (62) is a U-shaped groove.

7. The steel box girder segment connection and fixing device according to claim 1, characterized in that: The shelf (6) is also provided with a welding hole (63) for end welding operations.

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