Stepping type pushing construction device for steel box girder

Abstract

This invention provides a step-by-step jacking construction device for steel box girders, comprising a first support assembly and a second support assembly. The first support assembly has a longitudinal distribution beam, a base plate above the longitudinal distribution beam, and two transverse distribution beams on the base plate. The base plate also has a load-bearing assembly, which includes a bottom plate and a top plate. A pair of rotating cylinders are rotatably mounted on the bottom plate, and a pair of screws are fixedly mounted on the top plate. Transmission gears are fixedly mounted on the rotating cylinders. A drive shaft and a driven shaft are rotatably mounted on the bottom plate. The drive shaft has a drive wheel and a driven gear, and the driven shaft has a driven wheel. Side lugs are located on the left and right sides of the bottom plate. A first guide rod passes through the side lugs between the two transverse distribution beams, and a tension spring is sleeved on the first guide rod. Hydraulic push rods are mounted on the transverse distribution beams, and a transmission module is located at the telescopic end of the hydraulic push rod. The step-by-step jacking construction device for steel box girders provided by this invention facilitates the lifting and stable movement of steel box girders, with an ingenious structural design and high working efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel box girder jacking technology, specifically to a step-by-step jacking construction device for steel box girders. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with large spans and are called steel box girders because of their box-like shape. They have advantages such as high strength, lightweight structure, high degree of industrialization, easy repair, and recyclability, leading to their increasingly widespread application. Currently, the continuous launching method is commonly used for the construction of long-span steel box girders. In this method, box girder segments are assembled on a launching platform, and a continuous jacking system positioned on top of the piers pushes the assembled segments into place. In other words, high-thrust hydraulic cylinders push the steel box girder forward along its length.

[0003] However, existing jacking construction devices have many shortcomings that need improvement during use, such as: 1. When advancing along the length of the steel box girder, it is impossible to limit the width of the steel box girder. During the jacking process, the steel box girder is prone to deviation in the width direction, making it impossible to accurately jack it into place. If the deviation in the width direction is too large, it may even cause the steel box girder to overturn, increasing the construction difficulty and danger; 2. Some jacking construction devices apply force to a single point on the steel box girder, that is, using a large thrust cylinder to push the steel box girder forward at the rear end. This method may cause local deformation and damage to the steel box girder; 3. Some jacking construction devices first lift the steel box girder with a lifting device that can move along the direction of advancement, and then gradually move the steel box girder by moving the lifting device horizontally with a horizontal telescopic cylinder. Then, some displacement sensors monitor whether the steel box girder has deviated, and the steel box girder is reset with corresponding jacks. This has the problems of complex structural design and low construction efficiency.

[0004] Therefore, a new jacking construction device is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a step-by-step jacking construction device for steel box girders. The specific solution is as follows:

[0006] A step-by-step jacking construction device for steel box girders includes a first support assembly and a second support assembly arranged at intervals; the first support assembly is provided with multiple longitudinal distribution beams, a base plate is provided above the multiple longitudinal distribution beams, and two transverse distribution beams are arranged in a front-to-back manner on the base plate.

[0007] The base plate is also provided with a support assembly, which includes a bottom plate and a top plate. Multiple telescopic rods are provided between the bottom plate and the top plate. A pair of rotating cylinders arranged to the left and right are rotatably provided on the bottom plate. The two rotating cylinders have internal threads with opposite directions of rotation. A pair of screws are fixed on the top plate and screwed to the pair of rotating cylinders respectively. Transmission gears are fixed on the rotating cylinders. A drive shaft is rotatably provided on the rear side of the bottom plate. Drive wheels are provided at both ends of the drive shaft. A driven gear is fixed in the middle of the drive shaft. The bottom plate has a hollow structure for the driven gear. A driven shaft is rotatably provided on the front side of the bottom plate. Drive wheels are provided at both ends of the driven shaft. Multiple side ears are provided on the left and right sides of the bottom plate. Two first guide rods penetrating the side ears are provided between the two transverse distribution beams. Limiting grooves for the first guide rods are opened on the side ears. Tension springs are sleeved on the first guide rods. The two ends of the tension springs are fixedly connected to the transverse distribution beams and the side ears located at the rear respectively.

[0008] Hydraulic push rods are provided on the rear transverse distribution beams. The telescopic ends of the hydraulic push rods are provided with transmission modules for moving the top plate up and down and for moving the load-bearing components forward. The transmission module includes a main body. A pair of first racks for the two transmission gears are provided on the left and right sides of the main body. A one-way drive module for driving the driven gear to rotate in one direction is provided on the lower side of the main body. Pads for supporting the steel box girder are provided on the two transverse distribution beams. Multiple guide beams for connecting with the second support component are provided at the front end of the steel box girder.

[0009] Based on the above, the unidirectional drive module includes a plate frame fixed to the lower side of the main body. The plate frame has a groove, and multiple support shafts are provided in the groove. An annular groove is opened on the support shaft, and a sleeve is rotatably provided in the annular groove. The sleeve is provided with a toothed plate for the driven gear. A baffle is provided in the groove corresponding to each toothed plate, and a torsion spring is provided on the support shaft to force the toothed plate to fit against the baffle.

[0010] Based on the above, the top plate is provided with a clamping assembly for clamping the steel box girder, and the clamping assembly is linked with the second rack provided on the main body.

[0011] Based on the above, the clamping assembly includes a pair of brackets fixed to the lower side of the top plate, a rotating rod rotatably mounted on the pair of brackets, a linkage gear mounted on the rotating rod, threaded sections at both ends of the rotating rod, guide rods on both the left and right sides of the top plate, and a clamping plate for the steel box girder slidably mounted on the guide rod on each side of the top plate, an elastic pressure rod mounted on the clamping plate, and a pressure plate for the steel box girder at the telescopic end of the elastic pressure rod, with both ends of the rotating rod threaded through to the two clamping plates.

[0012] Based on the above, two second guide rods penetrating the main body are provided between the two transverse distribution beams.

[0013] Based on the above, the first support component includes multiple pipe columns, the bottom of each pipe column is provided with a first cement block, and the bottom of the first cement block is provided with multiple first anchor rods.

[0014] Based on the above, the second support component includes a column, a second cement block at the bottom of the column, multiple second anchor rods at the bottom of the second cement block, a guide seat at the top of the column, and multiple grooves for the guide beam on the guide seat.

[0015] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, this invention has the following advantages:

[0016] The step-by-step jacking construction device for steel box girders provided by this invention, through its ingenious structural design, facilitates the lifting and gradual movement of the steel box girder. During the movement, it can clamp and limit the girder to prevent it from deviating. The entire jacking process can be completed simply by extending and retracting the hydraulic push rod. Moreover, each step in the process is tightly connected, demonstrating the high working efficiency of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle.

[0019] Figure 3 This is a schematic diagram of the cooperation structure between the transmission module and the second guide rod in this invention.

[0020] Figure 4 This is a cross-sectional view of the unidirectional drive module in this invention.

[0021] Figure 5 yes Figure 3 Enlarged view of the structure at point B in the middle.

[0022] Figure 6 This is a partial top view of the structure in which the load-bearing component and the first guide rod cooperate in this invention.

[0023] Figure 7 This is a schematic diagram of the cooperation structure between the side ear and the first guide rod in this invention.

[0024] Figure 8 This is a schematic diagram of the clamping component and the steel box girder working together in this invention.

[0025] Figure 9 This is a top view of the structure in which the steel box girder, guide beam, and guide seat are assembled in this invention.

[0026] In the diagram: 1. Pipe column; 1-1. Hollow structure; 2. Longitudinal distribution beam; 3. Base plate; 4. Transverse distribution beam; 5. Pad block; 6. Hydraulic push rod; 7. First guide rod; 8. Transmission module; 8-1. Main body; 8-2. First rack; 8-3. Second rack; 8-4. Plate frame; 8-5. Groove; 8-6. Support shaft; 8-7. Sleeve; 8-8. Toothed plate; 8-9. Torsion spring; 8-10. Baffle; 9. Bearing assembly; 9-1. Base plate; 9-2. Top plate; 9-3. Telescopic rod; 9-4. Rotary drum; 9-5. Screw; 9-6. Drive wheel; 9-7. Driven wheel 9-8. Wheel; 9-9. Side lug; 9-10. Driven gear; 11. Limiting groove; 11. Clamping assembly; 11-1. Bracket; 11-2. Rotating rod; 11-3. Linkage gear; 11-4. Clamping plate; 11-5. Guide rod; 11-6. Elastic pressure rod; 12. Steel box girder; 13. Tension spring; 14. Connecting rod; 15. Column; 16. Support seat; 17. Guide seat; 17-1. Guide groove; 18. Guide beam; 19. Connecting bolt; 20. First cement block; 21. First anchor bolt; 22. Second cement block; 23. Second anchor bolt; 24. Second guide rod. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0028] Example

[0029] like Figure 1-9As shown, the present invention provides a step-by-step jacking construction device for steel box girders, comprising a first support assembly and a second support assembly arranged at intervals; the first support assembly is provided with multiple longitudinal distribution beams 2, and a base plate 3 is provided above the multiple longitudinal distribution beams 2, and two transverse distribution beams 4 are arranged front and rear on the base plate 3; a bearing assembly 9 is also provided on the base plate 3, the bearing assembly 9 including a bottom plate 9-1 and a top plate 9-2, and multiple telescopic rods 9-3 are provided between the bottom plate 9-1 and the top plate 9-2, and a rotating support is also provided on the bottom plate 9-1. A pair of rotating cylinders 9-4 arranged side by side, each with internal threads in opposite directions. A pair of screws 9-5, each screwed to one of the rotating cylinders 9-4, are fixed on the top plate 9-2. Transmission gears are fixed on each rotating cylinder 9-4. A drive shaft is rotatably mounted on the rear side of the bottom plate 9-1. Drive wheels 9-6 are located at both ends of the drive shaft, and a driven gear 9-9 is fixed in the middle of the drive shaft. The bottom plate 9-1 has a hollow structure 1-1 for the driven gear 9-9. A driven shaft is rotatably mounted on the front side of the bottom plate 9-1, with the driven shaft having two ends... A driven wheel 9-7 is provided, and multiple side lugs 9-8 are provided on the left and right sides of the base plate 9-1; two first guide rods 7 are provided between the two transverse distribution beams 4, passing through the side lugs 9-8. A limiting groove 9-10 is provided on the side lug 9-8 for the first guide rod 7. A tension spring 13 is sleeved on the first guide rod 7, and both ends of the tension spring 13 are fixedly connected to the transverse distribution beam 4 and the side lugs 9-8 located at the rear, respectively; a hydraulic push rod 6 is provided on the transverse distribution beam 4 located at the rear, and the telescopic end of the hydraulic push rod 6 is provided for... The transmission module 8 is used to move the top plate 9-2 up and down and drive the bearing component 9 forward. The transmission module 8 includes a main body 8-1. The left and right sides of the main body 8-1 are provided with a pair of first racks 8-2 respectively targeting the two transmission gears. The lower side of the main body 8-1 is provided with a one-way drive module that drives the driven gear 9-9 to rotate in one direction. The two transverse distribution beams 4 are provided with pads 5 for supporting the steel box girder 12. The front end of the steel box girder 12 is provided with multiple guide beams 18 for connecting with the second support component.

[0030] The aforementioned unidirectional drive module is used to drive the driven gear 9-9 to rotate in one direction to achieve forward movement of the bearing component 9. It includes a plate frame 8-4 fixed on the lower side of the main body 8-1. The plate frame 8-4 is provided with a groove 8-5. Multiple support shafts 8-6 are provided in the groove 8-5. An annular groove is opened on the support shaft 8-6. A sleeve 8-7 is rotatably provided in the annular groove. A toothed plate 8-8 is provided on the sleeve 8-7 for the driven gear 9-9. A baffle 8-10 is provided in the groove 8-5 for each toothed plate 8-8. A torsion spring 8-9 is provided on the support shaft 8-6 to force the toothed plate 8-8 to fit against the baffle 8-10.

[0031] During the jacking process of the steel box girder 12, in order to prevent it from deviating, a clamping assembly 11 for clamping the steel box girder 12 is provided on the top plate 9-2. The clamping assembly 11 is linked with the second rack 8-3 provided on the main body 8-1.

[0032] The aforementioned clamping assembly 11 includes a pair of brackets 11-1 fixedly mounted on the lower side of the top plate 9-2. A rotating rod 11-2 is rotatably mounted on the pair of brackets 11-1. A linkage gear 11-3 is mounted on the rotating rod 11-2. Threaded sections are provided at both ends of the rotating rod 11-2. Guide rods 11-5 are provided on both the left and right sides of the top plate 9-2. A clamping plate 11-4 for the steel box girder 12 is slidably mounted on each guide rod 11-5 on each side of the top plate 9-2. An elastic pressure rod 11-6 is provided on the clamping plate 11-4. A pressure plate for the steel box girder 12 is provided at the telescopic end of the elastic pressure rod 11-6. The two ends of the rotating rod 11-2 are threaded through to the two clamping plates 11-4.

[0033] To ensure the stable forward and backward movement of the transmission module 8, two second guide rods 24 are provided between the two transverse distribution beams 4, penetrating the main body 8-1.

[0034] The aforementioned first support component includes multiple pipe columns 1, with a first cement block 20 at the bottom of each pipe column 1, and multiple first anchor rods 21 at the bottom of each first cement block 20.

[0035] Considering the role of the first support component, the number of pipe columns 1 in this invention can be selected as four, and multiple connecting rods 14 are provided between two adjacent pipe columns 1 in the horizontal or vertical direction to improve the stability of the first support component.

[0036] The aforementioned second support component includes a column 15, a second cement block 22 at the bottom of the column 15, multiple second anchor rods 23 at the bottom of the second cement block 22, and a guide seat 17 at the top of the column 15. The guide seat 17 has multiple grooves 8-5 for the guide beam 18.

[0037] Each of the aforementioned guide beams 18 is fixedly connected to the steel box girder 12 by multiple connecting bolts 19.

[0038] The specific working principle of this invention is as follows: First, the steel box girder 12 is placed on the pad block 5 using hoisting equipment, and the guide beam 18 is lowered into the guide groove 17-1. When the jacking operation begins, the extension end of the hydraulic push rod 6 is slowly extended by the control equipment. As the transmission module 8 extends, the first rack 8-2 first contacts the transmission gear on the rotating drum 9-4. The two rotating drums 9-4 rotate, pushing the corresponding screw 9-5 upwards, which in turn causes the top plate 9-2 to rise, lifting the steel box girder 12 until the first rack 8-2 separates from the transmission gear, and the steel box girder 12 is pushed to its highest point. As the transmission module 8 continues to move forward, the second rack 8-3 contacts the linkage gear 11-3 in the clamping assembly 11 and pushes it to rotate. Then, the two clamping plates 11-4 move inwards simultaneously, causing the pressure plate at the end of the elastic pressure rod 11-6 to press against the steel box girder 12. As the transmission module 8 continues to move forward, the second rack 8-3 disengages from the linkage gear 11-3. The toothed plate 8-8 in the one-way drive module then contacts the driven gear 9-9 and begins to rotate, thereby causing the entire load-bearing assembly 9 to move forward and propel the steel box girder 12.

[0039] Then, the control device controls the hydraulic push rod 6 to slowly retract its telescopic end. First, the one-way drive module retracts behind the driven gear 9-9. Next, the second rack 8-3 contacts the linkage gear 11-3, causing it to reverse, thus separating the pressure plate from the steel box girder 12. Then, the first rack 8-2 contacts the transmission gear, the rotating drum 9-4 rotates, and the top plate 9-2 slowly falls. It is important to note that when the steel box girder 12 contacts the pad block 5, the foremost end of the first rack 8-2 meshes with the transmission gear, and the bearing component 9 begins to move backward from the foremost position, which is the process of the tension spring 13 resetting. Under the action of the tension spring 13, the bearing component 9 tends to move backward relative to the transmission module 8, that is, the transmission gear fixed on the rotating drum 9-4 tends to rotate, that is, the top plate 9-2 tends to rise, resulting in a certain friction between the top plate 9-2 and the steel box beam 12. However, the tension of the tension spring 13 is not enough to lift the steel box beam 12, and the friction generated here is negligible. After the tension spring 13 is reset, the telescopic end of the hydraulic push rod 6 continues to slowly retract a stroke until it is reset, and the first rack 8-2 is also separated from the transmission gear on the rotating drum 9-4, completing one pushing process.

[0040] After the steel box girder 12 is placed on the support seat 16, remove the connecting bolts 19, then remove the guide beam 18, and remove the guide seat 17 to complete the jacking operation.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A step-by-step jacking construction device for steel box girders, characterized in that: The system includes a first support assembly and a second support assembly arranged at intervals; the first support assembly is provided with multiple longitudinal distribution beams (2), and a base plate (3) is provided above the multiple longitudinal distribution beams (2), and two transverse distribution beams (4) arranged front and rear are provided on the base plate (3); the base plate (3) is also provided with a load-bearing assembly (9), the load-bearing assembly (9) includes a bottom plate (9-1) and a top plate (9-2), multiple telescopic rods (9-3) are provided between the bottom plate (9-1) and the top plate (9-2), and a pair of rotating cylinders arranged left and right are rotatably provided on the bottom plate (9-1). (9-4), the two rotating cylinders (9-4) have internal threads with opposite directions of rotation. A pair of screws (9-5) are fixed on the top plate (9-2) and are respectively screwed to the pair of rotating cylinders (9-4). A transmission gear is fixed on the rotating cylinder (9-4). A drive shaft is rotatably mounted on the rear side of the bottom plate (9-1). Drive wheels (9-6) are mounted at both ends of the drive shaft. A driven gear (9-9) is fixed in the middle of the drive shaft. The bottom plate (9-1) has a hollow structure (1-1) for the driven gear (9-9). A driven shaft is rotatably mounted on the front side of the bottom plate (9-1). Driven wheels (9-7) are provided at both ends, and multiple side ears (9-8) are provided on the left and right sides of the base plate (9-1); two first guide rods (7) are provided between the two transverse distribution beams (4) and pass through the side ears (9-8); a limiting groove (9-10) for the first guide rod (7) is provided on the side ear (9-8); a tension spring (13) is sleeved on the first guide rod (7); the two ends of the tension spring (13) are fixedly connected to the transverse distribution beam (4) and the side ears (9-8) located at the rear, respectively; a hydraulic push is provided on the transverse distribution beam (4) located at the rear. The hydraulic push rod (6) has a transmission module (8) at its telescopic end for driving the top plate (9-2) to move up and down and driving the bearing assembly (9) to move forward; the transmission module (8) includes a main body (8-1), and a pair of first racks (8-2) for the two transmission gears are provided on the left and right sides of the main body (8-1), and a one-way drive module for driving the driven gear (9-9) to rotate in one direction is provided on the lower side of the main body (8-1); the one-way drive module includes a plate frame (8-4) fixed on the lower side of the main body (8-1). The plate frame (8-4) is provided with a groove (8-5), and multiple support shafts (8-6) are provided in the groove (8-5). An annular groove is provided on the support shaft (8-6), and a sleeve (8-7) is rotatably provided in the annular groove. A toothed plate (8-8) for the driven gear (9-9) is provided on the sleeve (8-7). A baffle (8-10) is provided in the groove (8-5) for each toothed plate (8-8). A torsion spring (8-9) is provided on the support shaft (8-6) to force the toothed plate (8-8) to fit with the baffle (8-10). The two transverse distribution beams (4) are provided with pads (5) for supporting the steel box girder (12). The front end of the steel box girder (12) is provided with multiple guide beams (18) for overlapping with the second support component.

2. The step-by-step jacking construction device for steel box girders according to claim 1, characterized in that: The top plate (9-2) is provided with a clamping assembly (11) for clamping the steel box girder (12), and the clamping assembly (11) is linked with the second rack (8-3) provided on the main body (8-1).

3. The step-by-step jacking construction device for steel box girders according to claim 2, characterized in that: The clamping assembly (11) includes a pair of brackets (11-1) fixedly mounted on the lower side of the top plate (9-2). A rotating rod (11-2) is rotatably mounted on the pair of brackets (11-1). A linkage gear (11-3) is mounted on the rotating rod (11-2). Threaded sections are provided at both ends of the rotating rod (11-2). Guide rods (11-5) are provided on both the left and right sides of the top plate (9-2). A clamping plate (11-4) for the steel box girder (12) is slidably mounted on each guide rod (11-5) on each side of the top plate (9-2). An elastic pressure rod (11-6) is provided on the clamping plate (11-4). A pressure plate for the steel box girder (12) is provided at the telescopic end of the elastic pressure rod (11-6). The two ends of the rotating rod (11-2) are threaded through and connected to the two clamping plates (11-4).

4. The step-by-step jacking construction device for steel box girders according to claim 1, characterized in that: Two second guide rods (24) are provided between the two transverse distribution beams (4) and penetrating the main body (8-1).

5. The step-by-step jacking construction device for steel box girders according to claim 1, characterized in that: The first support assembly includes multiple pipe columns (1), the bottom of each pipe column (1) is provided with a first cement block (20), and the bottom of the first cement block (20) is provided with multiple first anchor rods (21).

6. The step-by-step jacking construction device for steel box girders according to claim 1, characterized in that: The second support component includes a column (15), the bottom of which is provided with a second cement block (22), the bottom of which is provided with multiple second anchor rods (23), the top of which is provided with a guide seat (17), and the guide seat (17) is provided with multiple grooves for the guide beam (18).

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