High-precision steel-concrete combined bridge box girder segment hoisting positioning device and positioning method

Abstract

The invention discloses a high-precision steel-concrete combined bridge box girder segment hoisting positioning device and method, and relates to the technical field of bridge construction.The high-precision steel-concrete combined bridge box girder segment hoisting positioning device comprises a rectangular frame, a plurality of fixing frames are fixedly installed on the bottom face of the rectangular frame, a pair of trapezoidal groove steel plates are slidably arranged on the front side and the rear side of the bottom face of each fixing frame, and a fixing plate is fixedly arranged in the middle of the top face of each fixing frame; the fixing plate is connected with the pair of trapezoidal groove steel plates through the meshing assembly; a first connecting shaft is rotatably inserted into the bottom of the opening of the trapezoidal groove steel plate, a plurality of L-shaped swing arms are fixedly arranged on the first connecting shaft, positioning baffles are fixedly arranged at the bottom ends of the L-shaped swing arms, and the multiple positioning baffles are perpendicular to the trapezoidal groove steel plate on the same side. Through flexible adjustment, accurate positioning and efficient operation, the hoisting requirements of different box girder sections are met, the construction quality and safety are guaranteed, the construction efficiency is improved, and the practical applicability is remarkable.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a high-precision steel-concrete composite bridge box girder segment hoisting and positioning device and method. Background Technology

[0002] In modern bridge construction, the hoisting of box girder segments for steel-concrete composite bridges is a crucial construction technique. Traditional hoisting methods often rely on simple supports and hoisting tools. This approach, due to inaccurate positioning and low construction efficiency, is prone to construction errors, affecting the safety and stability of the bridge. With the continuous advancement of engineering construction technology, the requirements for the precision and safety of hoisting equipment are becoming increasingly stringent.

[0003] Existing hoisting and positioning devices for steel-concrete composite bridge box girder segments have significant limitations: poor adaptability, as most are designed with fixed dimensions, requiring frequent replacements for box girder segments of different widths and sizes; insufficient positioning accuracy, with sliding structures prone to jamming and asynchronous movement on both sides, leading to easy displacement of the box girder during hoisting and affecting installation accuracy; and low efficiency, relying on manual calibration and adjustment, which is cumbersome, not only prolonging positioning time but also increasing labor intensity and slowing down construction progress, making it difficult to meet the needs of efficient and precise construction. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of poor adaptability in the prior art, which requires frequent replacement of box girder segments with different widths and sizes. Therefore, a high-precision steel-concrete composite bridge box girder segment hoisting and positioning device and positioning method are proposed.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A high-precision steel-concrete composite bridge box girder segment hoisting and positioning device includes a rectangular frame, on the bottom surface of which several equally spaced fixed frames are fixedly installed. A pair of symmetrically distributed trapezoidal channel steel plates are slidably provided on the front and rear sides of the bottom surface of the fixed frames. A fixed plate is fixedly provided in the middle of the top surface of the fixed frame. The fixed plate is connected to the pair of trapezoidal channel steel plates through a meshing component. Each trapezoidal channel steel plate has a first connecting shaft inserted into its open bottom. Each first connecting shaft has several L-shaped swing arms that are evenly distributed. Each L-shaped swing arm has a positioning baffle fixed at its bottom end. The positioning baffles are all perpendicular to the trapezoidal channel steel plate on the same side.

[0006] Preferably, the rectangular frame is provided with a number of equidistant connecting beams, and each connecting beam is rotatably fitted with a pair of eye bolts that are locked together by threads.

[0007] Preferably, a connecting plate is fixed at each of the four corners of the top surface of the fixed frame, and a bolt is inserted at each of the four corners of the bottom surface of each connecting plate. The threaded end of each bolt is locked to the rectangular frame by threads.

[0008] Preferably, a pair of symmetrically distributed I-shaped slide rails are fixed on both sides of the bottom surface of the fixed frame, and a pair of symmetrically distributed U-shaped slide plates are fixed on both sides of the top surface of the trapezoidal channel steel plate. Each U-shaped slide plate is slidably engaged on the I-shaped slide rail on the same side, thereby realizing the sliding connection between the trapezoidal channel steel plate and the fixed frame.

[0009] Preferably, the meshing assembly includes a gear and a rack. A fixed shaft is rotatably inserted into the center of the bottom surface of the fixed plate. A gear is concentrically fixed at the bottom end of the fixed shaft. A pair of staggered racks are meshed on both sides of the gear. Power transmission is achieved through the meshing of the gear and the rack.

[0010] Preferably, a pair of staggered side plates are fixed on the top surface of the pair of trapezoidal channel steel plates, and each side plate is fixedly connected to the rack on the same side, so that the movement of the rack can drive the trapezoidal channel steel plates to move synchronously.

[0011] Preferably, a pair of staggered hydraulic cylinders are fixed on the top surface of the pair of trapezoidal channel steel plates. Each hydraulic cylinder has a fixed lug at the end of its telescopic rod. The top of each fixed lug is fixed to the bottom surface of the fixed plate. The trapezoidal channel steel plates are moved by the telescopic movement of the hydraulic cylinders.

[0012] Preferably, a second connecting shaft is rotatably inserted into the open top of the trapezoidal channel steel plate, a single ear seat is fixed in the middle of the second connecting shaft, and a hydraulic cylinder is fixed at the bottom end of the single ear seat, so as to realize the rotational connection between the hydraulic cylinder and the trapezoidal channel steel plate.

[0013] Preferably, the telescopic rod end of the second hydraulic cylinder is fixedly provided with a U-shaped lug, and the open end of the U-shaped lug is provided with a fixed swing arm that is movably hinged. The outer end of the fixed swing arm is fixedly connected to the top end of the corresponding L-shaped swing arm, and the L-shaped swing arm is driven to swing by the extension and retraction of the second hydraulic cylinder.

[0014] This invention also discloses a positioning method for a high-precision steel-concrete composite bridge box girder segment hoisting and positioning device: Step 1: When hoisting the high-precision steel-concrete composite bridge box girder segment, connect several pairs of lifting eye bolts to the crane hook, and use the crane to lift the rectangular frame directly above the high-precision steel-concrete composite bridge box girder segment. Adjust the spacing of several pairs of trapezoidal channel steel plates according to the width of the high-precision steel-concrete composite bridge box girder segment. Step 2: Under the driving action of several pairs of hydraulic cylinders, the hydraulic rods of the hydraulic cylinders are controlled to extend and retract, and the reaction force is applied to the trapezoidal channel steel plate through the fixed lugs. This causes the trapezoidal channel steel plate and its top U-shaped sliding plate to slide along the I-shaped slide rail on the bottom surface of the fixed frame. At the same time, the side plates and racks fixed to the trapezoidal channel steel plate move synchronously. The rack meshes with the drive gear to rotate around the fixed axis to ensure that a pair of trapezoidal channel steel plates can achieve relative translation until several pairs of trapezoidal channel steel plates abut against both sides of the high-precision steel-concrete composite bridge box girder segment. Step 3: Under the driving action of several hydraulic cylinders 2, the hydraulic rods of the hydraulic cylinders 2 are controlled to extend. The hydraulic cylinders 2 drive the fixed swing arm to swing downward through the U-shaped lugs at their ends. The fixed swing arm synchronously drives several L-shaped swing arms and positioning baffles fixed to it to swing around the first connecting shaft axially until several positioning baffles abut against the bottom sides of the high-precision steel-concrete composite bridge box girder segment, forming a support and fixation for the high-precision steel-concrete composite bridge box girder segment. Step four: Use a crane to lift the rectangular frame and the high-precision steel-concrete composite bridge box girder segments that have been positioned and fixed, and transport them to the preset installation position.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, driven by a hydraulic cylinder, the trapezoidal channel steel plate can slide along the I-shaped slide rail, and with the meshing of gears and racks, the spacing can be adjusted; the hydraulic cylinder can drive the L-shaped swing arm and positioning baffle to swing, adapting to box girder segments of different widths and sizes, without the need for frequent device replacement, all components work together, and the hydraulic drive quickly completes the spacing adjustment and fixing, simplifying the operation process; 2. In this invention, the I-shaped slide rail and the U-shaped sliding plate cooperate to ensure the smooth sliding of the trapezoidal channel steel plate, the gear and rack transmission ensures synchronous movement on both sides, and the positioning baffle is vertically distributed with the trapezoidal channel steel plate and fixed from both sides and the bottom surface, reducing hoisting displacement, improving positioning accuracy, eliminating the need for repeated manual calibration, shortening hoisting positioning time, reducing labor intensity, and speeding up construction progress; In summary, this invention, through flexible adjustment, precise positioning, and efficient operation, meets the hoisting requirements of different box girder segments, ensures construction quality and safety, and improves construction efficiency, demonstrating significant practicality. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixed frame and a pair of trapezoidal side plates of the present invention; Figure 3This is a cross-sectional schematic diagram of the fixed frame and a pair of trapezoidal side plates of the present invention; Figure 4 This is an exploded view of the fixed frame and a pair of trapezoidal side plates structure of the present invention; Figure 5 This is a schematic diagram of a pair of trapezoidal side plates of the present invention; Figure 6 This is an exploded view of the pair of trapezoidal side plate structures of the present invention; In the diagram, the numbers are as follows: 100, rectangular frame; 101, connecting beam; 102, lifting eye bolt; 103, connecting plate; 200, fixed frame; 201, fixed plate; 202, fixed shaft; 203, gear; 204, rack; 205, side plate; 206, hydraulic cylinder one; 207, fixed lug; 208, I-beam slide rail; 209, U-shaped slide plate; 300, trapezoidal channel steel plate; 301, first connecting shaft; 302, L-shaped swing arm; 303, positioning baffle; 304, second connecting shaft; 305, hydraulic cylinder two; 306, U-shaped lug; 307, fixed swing arm. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Example: This example provides a high-precision steel-concrete composite bridge box girder segment hoisting and positioning device, see [link / reference]. Figures 1 to 6 Specifically, this includes a rectangular frame 100, which serves as the basic framework of the device, providing support and installation reference for the entire device. It is the core carrier connecting various components, and its structural stability directly affects the overall performance of the device. Several equidistant fixed frames 200 are fixedly installed on the bottom surface of the rectangular frame 100. The fixed frames 200 act as a bridge connecting the rectangular frame 100 and the trapezoidal channel steel plate 300, and also provide installation positions for components such as the I-beam slide rail 208. A sliding section is provided on both the front and rear sides of the bottom surface of the fixed frame 200. For the symmetrically distributed trapezoidal channel steel plates 300, the trapezoidal channel steel plates 300 adjust their own positions to initially position and clamp them from both sides of the box girder segment, while providing installation and movement space for components such as the L-shaped swing arm 302. A fixing plate 201 is fixed in the middle of the top surface of the fixing frame 200. The fixing plate 201 is connected to a pair of trapezoidal channel steel plates 300 through a meshing assembly. The fixing plate 201 is the mounting base for the meshing assembly and the hydraulic cylinder 206. By connecting with these components, the movement of the trapezoidal channel steel plates 300 can be controlled. Each trapezoidal channel steel plate 300 has a first connecting shaft 301 rotatably inserted at its open bottom. Each first connecting shaft 301 has several L-shaped swing arms 302 fixedly arranged at equal intervals. The first connecting shaft 301 provides a rotation shaft for the L-shaped swing arms 302, allowing the L-shaped swing arms 302 to swing around its axis, thereby driving the positioning baffle 303 to move. The driving force of the hydraulic cylinder 305 is transmitted to the positioning baffle 303, realizing the swing of the positioning baffle 303. The bottom end of each L-shaped swing arm 302 is fixedly equipped with a positioning baffle 303, and several positioning baffles 303 are perpendicular to the trapezoidal channel steel plate 300 on the same side. When swinging to both sides of the bottom surface of the box girder segment, it can support and fix the box girder segment, preventing the box girder segment from falling or shifting during the hoisting process.

[0019] It should be noted that: In this embodiment, a number of equidistantly distributed connecting beams 101 are fixed inside the rectangular frame 100. Each connecting beam 101 is rotatably inserted with a pair of lifting eye bolts 102 that are connected by threaded locking. The connecting beams 101 are used to enhance the structural strength of the rectangular frame 100 and provide an installation position for the lifting eye bolts 102, so that the lifting eye bolts 102 can be stably connected to the crane hook. Connecting plates 103 are fixed at the four corners of the top surface of the fixed frame 200. Bolts are inserted at the four corners of the bottom surface of each connecting plate 103. The threaded end of each bolt is connected to the rectangular frame 100 by threaded locking. The connecting plates 103 firmly install the fixed frame 200 on the rectangular frame 100, ensuring the stability of the connection between the two.

[0020] In the specific implementation process, such as Figure 2 , Figure 3 and Figure 4 As shown, a pair of symmetrically distributed I-shaped slide rails 208 are fixed on both sides of the bottom surface of the fixed frame 200, and a pair of symmetrically distributed U-shaped slide plates 209 are fixed on both sides of the top surface of the trapezoidal channel steel plate 300. Each U-shaped slide plate 209 is slidably engaged on the I-shaped slide rail 208 on the same side, realizing the sliding connection between the trapezoidal channel steel plate 300 and the fixed frame 200, so that the trapezoidal channel steel plate 300 can move smoothly along the I-shaped slide rail 208. The meshing assembly includes a gear 203 and a rack 204. A fixed shaft 202 is rotatably inserted into the center of the bottom surface of the fixed plate 201. A gear 203 is concentrically fixed at the bottom end of the fixed shaft 202. A pair of staggered racks 204 are meshed on both sides of the gear 203. Power transmission is achieved through the meshing of the gear 203 and the rack 204, ensuring that a pair of trapezoidal channel steel plates 300 can achieve relative translation. A pair of staggered side plates 205 are fixed on the top surface of the pair of trapezoidal channel steel plates 300. Each side plate 205 is fixed to the rack 204 on the same side, so that the movement of the rack 204 can drive the trapezoidal channel steel plates 300 to move synchronously. A pair of staggered hydraulic cylinders 206 are fixed on the top surface of a pair of trapezoidal channel steel plates 300. Each hydraulic cylinder 206 has a fixed lug 207 fixed at the end of its telescopic rod. The top of each fixed lug 207 is fixed to the bottom surface of the fixed plate 201. The trapezoidal channel steel plates 300 are moved by the telescopic movement of the hydraulic cylinders 206. The hydraulic cylinders 206 serve as the driving force for the movement of the trapezoidal channel steel plates 300. The trapezoidal channel steel plates 300 slide by the telescopic movement of the hydraulic rods.

[0021] In the specific implementation process, such as Figure 5 and Figure 6 As shown, a second connecting shaft 304 is rotatably inserted into the open top of the trapezoidal channel steel plate 300. A single ear seat is fixed in the middle of the second connecting shaft 304, and a hydraulic cylinder 305 is fixed at the bottom end of the single ear seat, so as to realize the rotational connection between the hydraulic cylinder 305 and the trapezoidal channel steel plate 300. The hydraulic cylinder 305 serves as the driving force source for the swing of the L-shaped swing arm 302. The extension and retraction of the hydraulic rod drives the fixed swing arm 307 to swing, thereby driving the L-shaped swing arm 302 and the positioning baffle 303 to move. The telescopic rod end of the hydraulic cylinder 2 305 is fixedly provided with a U-shaped lug 306. The open end of the U-shaped lug 306 is provided with a fixed swing arm 307 that is movably hinged. The outer end of the fixed swing arm 307 is fixedly connected to the top end of the corresponding L-shaped swing arm 302. The L-shaped swing arm 302 is driven to swing by the telescopic movement of the hydraulic cylinder 2 305.

[0022] The working principle of this embodiment is as follows: Step 1, when hoisting the high-precision steel-concrete composite bridge box girder segment, connect several pairs of lifting eye bolts 102 to the hook of the crane, and use the crane to lift the rectangular frame 100 to directly above the high-precision steel-concrete composite bridge box girder segment. Adjust the spacing of several pairs of trapezoidal channel steel plates 300 according to the width of the high-precision steel-concrete composite bridge box girder segment. Step 2: Under the driving action of several pairs of hydraulic cylinders 206, the hydraulic rods of the hydraulic cylinders 206 are controlled to extend and retract, and through the fixed lugs 207, they react on the trapezoidal channel steel plate 300, causing the trapezoidal channel steel plate 300 and its top U-shaped sliding plate 209 to slide along the I-shaped slide rail 208 on the bottom surface of the fixed frame 200. At the same time, the side plates 205 and rack 204 fixed to the trapezoidal channel steel plate 300 move synchronously. The rack 204 meshes with the drive gear 203 to rotate around the fixed shaft 202, so as to ensure that a pair of trapezoidal channel steel plates 300 can achieve relative translation, until several pairs of trapezoidal channel steel plates 300 respectively abut against both sides of the high-precision steel-concrete composite bridge box girder segment. Step 3: Under the driving action of several hydraulic cylinders 305, the hydraulic rods of the hydraulic cylinders 305 are extended. The hydraulic cylinders 305 drive the fixed swing arm 307 to swing downward through the U-shaped lugs 306 at their ends. The fixed swing arm 307 simultaneously drives several L-shaped swing arms 302 and positioning baffles 303 fixed to it to swing around the first connecting shaft 301 until the positioning baffles 303 abut against the bottom sides of the high-precision steel-concrete composite bridge box girder segment, forming a support and fixation for the high-precision steel-concrete composite bridge box girder segment. Step four: Use a crane to lift the rectangular frame 100 and the high-precision steel-concrete composite bridge box girder segment that has been positioned and fixed, and transport it to the preset installation position.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision steel-concrete composite bridge box girder segment hoisting and positioning device, comprising a rectangular frame (100), wherein a plurality of fixed frames (200) are fixedly installed on the bottom surface of the rectangular frame (100), characterized in that: A pair of trapezoidal channel steel plates (300) are slidably provided on the front and rear sides of the bottom of the fixed frame (200), and a fixed plate (201) is fixedly provided in the middle of the top surface of the fixed frame (200). The fixed plate (201) is connected to the pair of trapezoidal channel steel plates (300) through a meshing component. Each trapezoidal channel steel plate (300) has a first connecting shaft (301) rotatably inserted at its open bottom. Each first connecting shaft (301) has several L-shaped swing arms (302) fixedly mounted on it. Each L-shaped swing arm (302) has a positioning baffle (303) fixedly mounted at its bottom end. The positioning baffles (303) are all perpendicular to the trapezoidal channel steel plate (300) on the same side.

2. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 1, characterized in that: The rectangular frame (100) is fixedly provided with a number of connecting beams (101), and each connecting beam (101) is rotatably inserted with a pair of lifting eye bolts (102).

3. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 2, characterized in that: A connecting plate (103) is fixed at the top corner of the fixed frame (200), and a bolt is inserted at the bottom corner of each connecting plate (103). The threaded end of each bolt is locked to the rectangular frame (100) by thread.

4. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 3, characterized in that: A pair of I-shaped slide rails (208) are fixed on both sides of the bottom surface of the fixed frame (200), and a pair of U-shaped slide plates (209) are fixed on both sides of the top surface of the trapezoidal channel steel plate (300). Each U-shaped slide plate (209) is slidably engaged on the I-shaped slide rail (208) on the same side.

5. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 4, characterized in that: The meshing assembly includes a gear (203) and a rack (204). A fixed shaft (202) is rotatably inserted into the center of the bottom surface of the fixed plate (201). A gear (203) is sleeved on the bottom end of the fixed shaft (202). A pair of racks (204) are meshed on both sides of the gear (203).

6. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 5, characterized in that: A pair of side plates (205) are fixed on the top surface of the pair of trapezoidal channel steel plates (300), and each of the side plates (205) is fixedly connected to the rack (204) on the same side.

7. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 6, characterized in that: A pair of hydraulic cylinders (206) are fixed on the top surface of the pair of trapezoidal channel steel plates (300). Each hydraulic cylinder (206) has a fixed lug (207) fixed at the end of its telescopic rod. The top of each fixed lug (207) is fixed to the bottom surface of the fixed plate (201).

8. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 7, characterized in that: The trapezoidal channel steel plate (300) has a second connecting shaft (304) rotatably inserted at the top of its opening. A single ear seat is fixed in the middle of the second connecting shaft (304), and a hydraulic cylinder (305) is fixed at the bottom end of the single ear seat.

9. The high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 8, characterized in that: The telescopic rod end of the hydraulic cylinder 2 (305) is fixedly provided with a U-shaped lug (306), and the open end of the U-shaped lug (306) is provided with a fixed swing arm (307). The outer end of the fixed swing arm (307) is fixedly connected to the top end of the corresponding L-shaped swing arm (302).

10. The positioning method of the high-precision steel-concrete composite bridge box girder segment hoisting and positioning device according to claim 9, characterized in that: Step 1: Connect several pairs of lifting eye bolts (102) to the hook of the crane, and lift the rectangular frame (100) to the top of the high-precision steel-concrete composite bridge box girder segment by the crane. Adjust the spacing of several pairs of trapezoidal channel steel plates (300) according to the width of the high-precision steel-concrete composite bridge box girder segment. Step 2: Under the driving action of several pairs of hydraulic cylinders (206), the hydraulic rods of the hydraulic cylinders (206) are controlled to extend and retract, and through the fixed lugs (207), they react on the trapezoidal channel steel plate (300), causing the trapezoidal channel steel plate (300) and the U-shaped sliding plate (209) to slide along the I-shaped slide rail (208), and simultaneously driving the side plate (205) and the rack (204) to move. The rack (204) meshes with the drive gear (203) to rotate around the fixed shaft (202) to ensure that a pair of trapezoidal channel steel plates (300) achieve relative translation until several pairs of trapezoidal channel steel plates (300) respectively abut against both sides of the high-precision steel-concrete composite bridge box girder segment; Step 3: Under the driving action of several hydraulic cylinders 2 (305), the hydraulic rods of the hydraulic cylinders 2 (305) are extended. The hydraulic cylinders 2 (305) drive the fixed swing arm (307) to swing downward through the U-shaped lugs (306) at their ends. The fixed swing arm (307) simultaneously drives several L-shaped swing arms (302) and positioning baffles (303) to swing around the first connecting shaft (301) axially until several positioning baffles (303) abut against the bottom sides of the high-precision steel-concrete composite bridge box girder segment. Step four: Use a crane to lift the rectangular frame (100) and the high-precision steel-concrete composite bridge box girder segment that has been positioned and fixed, and transport it to the preset installation position.

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