Steel box girder hoisting construction self-guiding quick connecting structure and connecting method

Abstract

The application discloses a kind of steel box girder hoisting construction self-guiding quick connection structure and connecting method, the structure includes first steel box girder, second steel box girder, receiving component and butt joint component;Receiving component is installed in the inside of first steel box girder opening end, is composed of first support part, fixed tube and guide flared mouth, butt joint component is correspondingly installed in the inside of second steel box girder opening end, is composed of second support part, guide rod and butt joint ball;Receiving component and butt joint component are arranged as two groups, are arranged in the upper two corner positions of girder butt joint end.Guide flared mouth adopts arc funnel structure;Fixed tube outside is provided with torsional spring eccentric ratchet, cooperates with the positioning groove on guide rod to realize elastic self-locking;Positioning cylinder is equipped with support spring and limit ring inside.The application realizes self-guiding butt joint by guide flared mouth, cooperates with ratchet self-locking, spring buffer structure, without manual repeated adjustment, greatly improves steel box girder high-altitude hoisting butt joint efficiency and positioning accuracy, reduces construction difficulty and safety risk.

Description

Technical Field

[0001] This invention relates to the field of steel box girder hoisting and construction technology, and in particular to a self-guiding rapid connection structure and connection method for steel box girder hoisting and construction. Background Technology

[0002] In the field of modern bridge and steel structure construction, steel box girders, as core load-bearing components, are directly affected by their segmented hoisting and connection processes, which determine the overall construction quality, installation efficiency, and operational safety. Steel box girder construction commonly employs a segmented prefabrication and aerial connection method: after the prefabrication of each steel box girder segment on the ground, hoisting equipment is used to transport the components to the design elevation, and then adjacent segments are connected and fixed. The connection of steel box girder segments is a critical step in the hoisting operation. Its connection efficiency, positioning accuracy, and structural reliability not only affect the hoisting cycle of a single component but also the construction progress and structural safety of the entire project. Therefore, developing efficient and stable steel box girder connection technology has always been a key research direction in this field.

[0003] Existing hoisting equipment can only complete the initial alignment of steel box girders. Due to factors such as hoisting sway, external wind disturbance, component processing deviations, and limited working space, the position and posture of the components cannot be calibrated in one go. Traditional connection structures lack automatic guidance and self-locking functions. After the initial alignment, workers still need to repeatedly adjust the position and angle of the components at high altitudes, resulting in a large amount of manual intervention.

[0004] This type of operation not only reduces construction efficiency and extends the hoisting period, but also increases safety hazards associated with working at heights; moreover, manual adjustment makes it difficult to guarantee consistent docking accuracy. Therefore, the industry urgently needs to develop a connection structure with automatic guidance and autonomous locking functions to reduce manual operation at heights, ensuring docking accuracy and connection strength while improving overall construction efficiency. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides a self-guided rapid connection method for steel box girder hoisting construction, aiming to improve the problem in the prior art that it is difficult to quickly achieve accurate positioning and docking of two sets of steel box girders.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a self-guided rapid connection structure connection method for steel box girder hoisting construction, which aims to improve the problem in the prior art that it is difficult to quickly achieve accurate positioning and docking of two sets of steel box girders.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a self-guided rapid connection structure for steel box girder hoisting construction, comprising a first steel box girder, a second steel box girder, and further comprising a receiving component and a docking component; the receiving component is installed inside the open end of the first steel box girder, and the docking component is correspondingly installed inside the open end of the second steel box girder; the receiving component includes a first support part, a fixed pipe, and a guide flare, the first support part being fixedly connected to the fixed pipe, and the guide flare being located at the docking end of the fixed pipe; the docking component includes a second support part, a guide rod, and a docking ball, the second support part being assembled with the guide rod, and the docking ball being fixedly installed at the docking end of the guide rod.

[0008] Preferably, the receiving component and the docking component are arranged in pairs, with a total of two sets, which are respectively arranged at the two upper corners of the docking ends of the first steel box girder and the second steel box girder.

[0009] Preferably, the outer side of the fixed tube is provided with three sets of adjustment frames, and the adjustment frames are equipped with torsion spring eccentric pawls; the outer wall of the guide rod is provided with several sets of positioning grooves, and the torsion spring eccentric pawls are matched and engaged with the positioning grooves.

[0010] Preferably, the first support is composed of two sets of fixing plates, the two sets of fixing plates are inclined, and a stabilizing plate is fixedly arranged between the two sets of fixing plates.

[0011] Preferably, the second support part is a positioning cylinder, and the guide rod is movably inserted into the left end of the positioning cylinder; a limiting ring is fixedly provided at the tail of the guide rod, and a support spring is provided inside the positioning cylinder, with the two ends of the support spring respectively abutting the right end of the inner cavity of the positioning cylinder and the limiting ring.

[0012] Preferably, the guide flare is an arc-shaped funnel structure, with its diameter continuously narrowing from the outside to the inside, and the inner wall adopting a smooth arc transition. The minimum inner diameter of the guide flare is equal to the diameter of the inner hole of the fixed tube.

[0013] Preferably, a flange plate is fixedly provided on the side of each of the two sets of fixing plates and positioning cylinders away from the mating surface.

[0014] Preferably, both the first and second steel box girders are provided with angled mounting seats or T-shaped mounting seats inside, and the flange plate is fixedly connected to the angled mounting seats / T-shaped mounting seats.

[0015] The present invention also provides a connection method based on the above-mentioned self-guiding rapid connection structure for steel box girder hoisting construction, comprising the following steps: Step 1: Assemble the receiving component and docking component onto the angle mounting base or T-shaped mounting base inside the first steel box girder and the second steel box girder respectively through the flange plate, complete the pre-assembly and stabilization of all components, and form an overall support system; Step 2: Use lifting equipment to lift the second steel box girder and slowly move it towards the first steel box girder, aligning the guide rod with the fixed pipe. Rely on the inclined fixed plate and the stabilizing plate to form rigid support to ensure the initial stability of the docking. Step 3: As the second steel box girder continues to approach, the connecting ball at the end of the guide rod slides into the fixed tube along the guide flare, gradually completing the correction of the steel box girder's lateral, longitudinal, and angular deviations; Step 4: The guide rod continues to extend, and the torsion spring eccentric pawl is squeezed by the guide rod to elastically move out of position. When the positioning groove and the torsion spring eccentric pawl are aligned, the torsion spring eccentric pawl springs back and locks into the positioning groove, realizing automatic locking and precise alignment. Step 5: The guide rod continues to move into the positioning cylinder, causing the limit ring to compress the support spring. The support spring absorbs the lifting impact and provides axial preload, forming a stable connection structure with the fixing pipe and positioning cylinder, thus completing the temporary locking of the two steel box girder sections.

[0016] The present invention has the following beneficial effects: 1. This invention utilizes an arc-shaped funnel-shaped guide flare and a docking ball to form a guiding mechanism. Relying on the good guiding adaptability and assembly convenience brought by the funnel-shaped curved surface structure, combined with the adaptive guiding characteristics of the curved surface, it can automatically offset the position and angle deviations caused by factors such as component processing errors, hoisting sway, and external wind disturbances, making the docking process smoother. It reduces repeated adjustments during construction from the root, eliminating the need for operators to repeatedly adjust the posture of components at high altitudes, greatly reducing the content of high-altitude operations, improving hoisting efficiency, and significantly reducing the safety risks of high-altitude operations.

[0017] 2. This invention utilizes an adjusting frame and a torsion spring eccentric pawl on the outside of the fixed tube, along with a matching positioning groove on the outer wall of the guide rod, to form an elastic self-locking mechanism that automatically locks after insertion. Simultaneously, the buffer pre-tightening structure formed by the supporting spring inside the positioning cylinder absorbs the impact of the connection and maintains long-term connection stability, effectively preventing loosening or misalignment of the connection points. This structure not only improves the positioning accuracy and assembly consistency of hoisting and docking, reducing the frequency of manual adjustments, but also further enhances the structural stability of the connection points, ensuring overall construction quality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a self-guiding rapid connection structure for steel box girder hoisting construction proposed in this invention; Figure 2 This is a partial structural diagram of the second steel box girder of the self-guiding rapid connection structure for steel box girder hoisting construction proposed in this invention; Figure 3 This is a partial structural diagram of the fixing plate of a self-guiding quick connection structure for steel box girder hoisting construction proposed in this invention; Figure 4This is a cross-sectional schematic diagram of the internal structure of the fixed pipe of a self-guiding rapid connection structure for steel box girder hoisting construction proposed in this invention; Figure 5 This is a cross-sectional view of the internal structure of the positioning cylinder of a self-guided rapid connection structure for steel box girder hoisting construction proposed in this invention.

[0019] Legend: 1. First steel box girder; 2. Second steel box girder; 3. Fixing plate; 4. Fixing tube; 5. Positioning cylinder; 6. Guide rod; 7. Flared tube; 8. Positioning ball; 9. Mounting plate; 10. Flange plate; 11. Stabilizing plate; 12. Adjusting frame; 13. Torsion spring eccentric pawl; 14. Positioning groove; 16. Limiting ring; 17. Support spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 , Figure 2 As shown, the present invention provides a self-guided rapid connection structure for steel box girder hoisting construction, including a first steel box girder 1, a second steel box girder 2, and paired receiving components and docking components; the two sets of receiving components and the two sets of docking components are assembled one-to-one and installed at the upper two corners of the docking ends of the first steel box girder 1 and the second steel box girder 2 respectively. The symmetrical arrangement of the two sets of components can ensure balanced force on the opposite side and improve the overall alignment stability.

[0022] The receiving assembly is installed inside the open end of the first steel box girder 1, and mainly consists of a first support part, a fixing tube 4, and a guide flare 7. (Refer to...) Figure 3 The first support consists of two sets of obliquely arranged fixing plates 3, which are fixed to a stabilizing plate 11 by welding. The fixing plates 3 and the stabilizing plate 11 together form a triangular support system. This support structure has a reasonable mechanical transmission path, which can effectively disperse the hoisting load and docking impact force, and significantly improve the overall load-bearing capacity and deformation resistance of the fixing pipe 4. The right ends of the two sets of fixing plates 3 are fixedly connected to the fixing pipe 4. The end of the fixing pipe 4 facing the second steel box girder 2 is integrally machined with a guide flare 7. The guide flare 7 is an arc-shaped funnel structure with its inner cavity continuously and smoothly narrowing from the outside to the inside. The inner wall adopts a full arc transition design, and the minimum inner diameter of the guide flare 7 is consistent with the inner diameter of the fixing pipe 4, which can ensure smooth insertion and achieve high-precision guiding positioning.

[0023] The docking assembly is assembled inside the open end of the second steel box girder 2. In this embodiment, the positioning cylinder 5 is used as the second support part of the docking assembly. The left end of the positioning cylinder 5 is movably fitted with a guide rod 6. The outer end of the guide rod 6 is fixedly installed with a docking ball 8. The docking ball 8 cooperates with the guide flare 7 and the fixing tube 4 to complete the guiding and insertion actions of the steel box girder docking process.

[0024] Combination Figure 4 It can be seen that three sets of adjustment frames 12 are evenly arranged circumferentially on the outer side of the fixed tube 4. Each set of adjustment frames 12 is equipped with a torsion spring eccentric pawl 13. Multiple sets of positioning grooves 14 are opened axially on the outer wall of the guide rod 6. The torsion spring eccentric pawl 13 corresponds to the positioning groove 14 and is engaged with each other, so as to realize the automatic one-way locking function after the guide rod 6 is inserted into the position, effectively restricting the axial movement of the guide rod 6.

[0025] Reference Figure 5 One end of the guide rod 6, which extends into the positioning cylinder 5, is fixedly sleeved with a limiting ring 16. A support spring 17 is installed inside the positioning cylinder 5, with its two ends abutting against the right end of the positioning cylinder 5's inner cavity and the end face of the limiting ring 16, respectively. When the guide rod 6 moves axially, it causes the limiting ring 16 to move synchronously and compress the support spring 17. The spring's elasticity absorbs the impact load generated during hoisting and docking. Simultaneously, the spring's rebound applies a continuous axial preload to the guide rod 6, effectively preventing the guide rod 6 from loosening or slipping during use.

[0026] Flange plates 10 are fixedly installed on the side of the two sets of fixing plates 3 away from the fixing pipe 4 and on the side of the positioning cylinder 5 away from the guide rod 6. Angle-shaped mounting seats or T-shaped mounting seats are respectively installed at corresponding installation positions inside the first steel box girder 1 and the second steel box girder 2. The flange plates 10 are detachably fixed to the angle-shaped mounting seats or T-shaped mounting seats using standard fasteners. This modular assembly structure facilitates rapid on-site pre-assembly, subsequent maintenance, and parts replacement, and is suitable for construction scenarios with various confined working spaces.

[0027] This invention also discloses a hoisting connection method based on the above-mentioned self-guiding rapid connection structure for steel box girder hoisting construction. The specific construction steps are as follows: Step 1: Pre-install and fix the components The receiving component and the docking component are assembled onto the angled or T-shaped mounting seats inside the first steel box girder 1 and the second steel box girder 2 respectively via flange plate 10, completing the overall positioning and fastening operations. After assembly, the working status of the fixing plate 3, the stabilizing plate 11, the torsion spring eccentric pawl 13, and the support spring 17 are checked one by one to ensure that all components are firmly connected and move flexibly, so that the entire set of connecting components forms a stable and reliable overall support system.

[0028] Step 2: Initial positioning during hoisting The second steel box girder 2 was lifted smoothly using lifting equipment, maintaining its horizontal position and slowly moved towards the docking end of the first steel box girder 1, so that the guide rod 6 was initially aligned with the center position of the fixed pipe 4. During this process, the triangular support structure composed of the inclined fixed plate 3 and the stabilizing plate 11 continuously provided rigid support, ensuring the structural stability in the initial stage of docking.

[0029] Step 3: Self-guided precision insertion As the second steel box girder 2 approaches the first steel box girder 1, the connecting ball 8 at the end of the guide rod 6 first contacts the guide flare 7. Under the guidance of the curved surface of the arc-shaped funnel-shaped inner wall, it automatically corrects the lateral offset, longitudinal height difference and angular deflection between the two steel box girder sections. The connecting ball 8 smoothly slides into the fixed tube 4 along the arc inner wall of the guide flare 7, completing the adaptive correction and insertion action.

[0030] Step 4: Elastic mechanism locking and positioning The guide rod 6 continues to extend into the fixed tube 4, and the outer wall of the rod presses against the torsion spring eccentric pawl 13, causing the torsion spring eccentric pawl 13 to elastically release. When the positioning groove 14 on the outer side of the guide rod 6 moves with the rod to the corresponding position of the torsion spring eccentric pawl 13, the torsion spring eccentric pawl 13 automatically rebounds under the elastic force of its own torsion spring and locks into the positioning groove 14. Through multi-point locking, the guide rod 6 and the fixed tube 4 are automatically locked, and the two steel box girder sections are accurately aligned.

[0031] Step 5: Buffer shaping and temporary locking The guide rod 6 continues to move into the positioning cylinder 5, simultaneously driving the tail limit ring 16 to compress the support spring 17; the support spring 17 fully absorbs the impact load generated by the hoisting operation and applies a constant axial preload to the guide rod 6 by relying on elastic deformation. At this time, the fixing pipe 4 and the positioning cylinder 5 cooperate with each other to form a stable connection and support system, and the two steel box girders are temporarily locked.

[0032] After the temporary connection of the steel box girder is completed, the construction personnel can conduct a final check on the installation elevation and overall alignment of the steel box girder. After the check is correct, the segment welding or high-strength bolt fastening work is carried out to complete the permanent connection construction of the steel box girder segments.

[0033] This invention integrates functions such as guidance and correction, elastic self-locking, buffering and shock absorption, and rigid support into one unit, eliminating the traditional construction method of repeated manual adjustment at high altitudes. The overall structural design is reasonable and the operation is stable and reliable, which can effectively improve the construction efficiency and operational safety of segmented steel box girder hoisting. It has high application value and promotion prospects in the field of steel box girder hoisting construction.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A self-guiding rapid connection structure for steel box girder hoisting construction, comprising a first steel box girder (1) and a second steel box girder (2), characterized in that: It also includes a receiving component and a docking component; the receiving component is installed inside the open end of the first steel box girder (1), and the docking component is installed inside the open end of the second steel box girder (2); the receiving component includes a first support part, a fixed tube (4) and a guide flare, the first support part is fixedly connected to the fixed tube (4), and the guide flare is located at the docking end of the fixed tube (4); the docking component includes a second support part, a guide rod (6) and a docking ball, the second support part is assembled with the guide rod (6), and the docking ball is fixedly installed at the docking end of the guide rod (6).

2. The self-guiding rapid connection structure for steel box girder hoisting construction according to claim 1, characterized in that: The receiving component and the docking component are set in pairs, with a total of two sets, which are respectively arranged at the upper corners of the docking ends of the first steel box girder (1) and the second steel box girder (2).

3. The self-guiding rapid connection structure for steel box girder hoisting construction according to claim 1, characterized in that: The fixed tube (4) is provided with three sets of adjustment frames (12) on the outside, and the adjustment frames (12) are equipped with torsion spring eccentric pawls (13); the guide rod (6) has several sets of positioning grooves (14) on its outer wall, and the torsion spring eccentric pawls (13) and the positioning grooves (14) are matched and engaged with each other.

4. The self-guiding rapid connection structure for steel box girder hoisting construction according to claim 1, characterized in that: The first support is composed of two sets of fixing plates (3), the two sets of fixing plates (3) are inclined, and a stabilizing plate (11) is fixedly arranged between the two sets of fixing plates (3).

5. The self-guiding rapid connection structure for steel box girder hoisting construction according to claim 1, characterized in that: The second support part is a positioning cylinder (5), and the guide rod (6) is movably inserted into the left end of the positioning cylinder (5); the tail of the guide rod (6) is fixedly provided with a limiting ring (16), and the positioning cylinder (5) is provided with a support spring (17), and the two ends of the support spring (17) respectively abut against the right end of the inner cavity of the positioning cylinder (5) and the limiting ring (16).

6. The self-guiding rapid connection structure for steel box girder hoisting construction according to claim 1, characterized in that: The guide flare is an arc-shaped funnel structure with its diameter continuously narrowing from the outside to the inside. The inner wall adopts a smooth arc transition, and the minimum inner diameter of the guide flare is equal to the inner diameter of the fixed tube (4).

7. A self-guiding rapid connection structure for steel box girder hoisting construction according to claim 4 or 5, characterized in that: Flange plates (10) are fixedly installed on the side of the two sets of fixing plates (3) and positioning cylinders (5) that are away from the mating surface.

8. The self-guiding rapid connection structure for steel box girder hoisting construction according to claim 1, characterized in that: The first steel box girder (1) and the second steel box girder (2) are both provided with angle mounting seats or T-shaped mounting seats inside, and the flange plate (10) is fixedly connected to the angle mounting seat / T-shaped mounting seat.

9. A method for hoisting and connecting steel box girders based on the self-guiding rapid connection structure for steel box girder hoisting construction as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Assemble the receiving component and docking component onto the angle mounting base or T-shaped mounting base inside the first steel box girder (1) and the second steel box girder (2) respectively through the flange plate (10) to complete the pre-assembly and stabilization of all components and form an overall support system; Step 2: Use the lifting equipment to lift the second steel box girder (2) and slowly move it toward the first steel box girder (1) so that the guide rod (6) is aligned with the fixed pipe (4). Rely on the inclined fixed plate (3) and the stabilizing plate (11) to form a rigid support to ensure the stability of the initial docking state. Step 3: As the second steel box girder (2) continues to approach, the connecting ball at the end of the guide rod (6) slides into the fixed tube (4) along the guide flare, gradually completing the correction of the transverse, longitudinal and angular deviations of the steel box girder; Step 4: The guide rod (6) continues to extend in, and the torsion spring eccentric pawl (13) is squeezed by the guide rod (6) to elastically make room. When the positioning groove (14) and the torsion spring eccentric pawl (13) are aligned, the torsion spring eccentric pawl (13) rebounds and locks into the positioning groove (14), realizing automatic locking and precise alignment. Step 5: The guide rod (6) continues to move into the positioning cylinder (5), driving the limit ring (16) to compress the support spring (17). The support spring (17) absorbs the hoisting impact and provides axial preload. Together with the fixing pipe (4) and the positioning cylinder (5), a stable connection structure is formed, and the two steel box beams are temporarily locked.

Images