High-precision steel box girder pushing deviation rectifying mechanism

Abstract

The utility model discloses a high-precision steel box girder pushing deviation rectifying mechanism, which belongs to the field of steel box girder pushing construction and comprises a temporary support provided with a mounting seat. According to the deviation rectifying device, the deviation rectifying assembly is arranged, the jacking idler wheel is installed on the connecting base through the pin shaft, the threaded connector and the locking nut, the contact mode of the jacking idler wheel and the steel box girder in the deviation rectifying process is rolling contact, the friction force generated by rolling contact is small, the accuracy of jacking deviation rectifying cannot be affected, and the deviation rectifying device has the high precision; the connecting base is connected to the tail end of the telescopic shaft and is convenient to mount and dismount, one end of the guiding structure is connected to the deviation rectifying assembly, the other end of the guiding structure is connected to the mounting base, the horizontality of the deviation rectifying assembly can be guaranteed, the deviation rectifying assembly is prevented from rotating on the hydraulic oil cylinder along with the telescopic shaft, and the deviation rectifying accuracy is guaranteed; under the condition that guiding is not affected, slight rotating adaptation can be conducted in the installation process, and the installation adaptability is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder jacking construction, and in particular to a high-precision steel box girder jacking correction mechanism. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. During construction and installation, steel box girders are typically installed using a jacking method. However, due to factors such as terrain and construction errors, the steel box girder is prone to shifting during the jacking process, affecting construction accuracy and safety. To improve construction accuracy and safety, a correction mechanism is used to correct the deviation during the jacking of the steel box girder.

[0003] Existing patent number CN205295963U discloses a "Transverse Correction Support Structure for the Jacking Construction of Large-Span Steel Box Girder." This patent utilizes temporary supports, a bottom bearing platform, and correction jacks to effectively correct the deviation of the steel box girder during jacking. However, in this patent, the use of correction jacks results in sliding friction between the tip of the jack and the steel box girder. This sliding friction affects the accuracy of the correction, leading to errors and a generally poor correction effect. Utility Model Content

[0004] The main purpose of this invention is to provide a high-precision steel box girder pushing and correction mechanism, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-precision steel box girder jacking and correction mechanism includes a temporary support, a mounting base on the temporary support, a hydraulic cylinder on the mounting base, a telescopic shaft on the hydraulic cylinder, a correction component connected to the end of the telescopic shaft, and a guide structure connected to the correction component. The guide structure is connected to the mounting base.

[0007] Preferably, the end of the telescopic shaft is provided with a stud, and the telescopic shaft is connected to the correction assembly through the stud.

[0008] Preferably, the mounting base has a through hole, and the mounting base is fixed to the temporary bracket by screws, with a portion of the guide structure passing through the through hole.

[0009] Preferably, the correction assembly includes a connecting seat, a threaded hole, a top roller, a pin, a threaded connector, and a locking nut. The threaded hole is formed on the connecting seat, and the connecting seat is connected to a stud through the threaded hole. The top roller is disposed on the connecting seat, and the connecting seat and the top roller are provided with through holes. The lower end of the pin is provided with a baffle, and the pin is located in the through hole. The threaded connector is fixedly connected to the pin, and the upper end of the threaded connector protrudes through the through hole. The locking nut is connected to the threaded connector.

[0010] Preferably, the guiding structure includes a connecting block, a mounting plate, a waist-shaped hole, a guide rod, an inner shaft, and a limiting plate. The connecting block is fixedly connected to the mounting plate, the waist-shaped hole is opened on the mounting plate, and the mounting plate is fixed to the correction assembly by mounting bolts. One end of the guide rod is provided with a round hole, and the other end of the guide rod is located in a through hole.

[0011] Preferably, the inner shaft is fixedly connected to the limiting plate, and the inner shaft is located in the round hole at the end of the guide rod, and the upper end of the inner shaft is threadedly connected to the connecting block.

[0012] Compared with the prior art, this utility model has the following beneficial effects: This high-precision steel box girder pushing and correcting mechanism, through the set correction component, has a top material roller installed on the connecting seat via a pin, threaded joint, and locking nut. During the correction process, the contact between the top material roller and the steel box girder is a rolling contact. The friction generated by the rolling contact is small and will not affect the accuracy of the top material correction, thus achieving high precision. The connecting seat is connected to the end of the telescopic shaft, which is convenient for installation and disassembly. A guiding structure is adopted, with one end connected to the correction component and the other end connected through to the mounting seat. This ensures the horizontality of the correction component and prevents the correction component from rotating on the hydraulic cylinder with the telescopic shaft, thus ensuring the accuracy of the correction. The guiding structure is equipped with a mounting plate, guide rod, inner shaft, and other structures. Without affecting the guidance, slight rotation and adaptation can be performed during the installation process, increasing the installation adaptability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model;

[0015] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 This is a schematic diagram of the guiding structure of this utility model.

[0017] In the diagram: 1. Temporary support; 2. Mounting base; 3. Hydraulic cylinder; 4. Telescopic shaft; 5. Correction assembly; 501. Connecting seat; 502. Threaded hole; 503. Top roller; 504. Pin; 505. Threaded joint; 506. Locking nut; 6. Guide structure; 601. Connecting block; 602. Mounting plate; 603. Waist-shaped hole; 604. Guide rod; 605. Inner shaft; 606. Limiting plate; 7. Stud; 8. Through hole. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figures 1-4 As shown, a high-precision steel box girder pushing and correction mechanism includes a temporary support 1, a mounting base 2 on the temporary support 1, a hydraulic cylinder 3 on the mounting base 2, a telescopic shaft 4 on the hydraulic cylinder 3, a correction component 5 connected to the end of the telescopic shaft 4, and a guide structure 6 connected to the correction component 5. The guide structure 6 is connected to the mounting base 2. A stud 7 is provided at the end of the telescopic shaft 4, and the telescopic shaft 4 is connected to the correction component 5 through the stud 7. A through hole 8 is provided on the mounting base 2, and the mounting base 2 is fixed to the temporary support 1 by screws. A part of the guide structure 6 passes through the through hole 8.

[0020] During the jacking operation of the steel box girder, a temporary support 1 is installed on the pier. A hydraulic cylinder 3 is fixed to the temporary support 1 via a mounting base 2. A correction component 5 is installed at the end of the telescopic shaft 4 via studs 7, ensuring the horizontal alignment of the correction component 5. A guide structure 6 is installed on the correction component 5, with components in the guide structure 6 passing through through holes 8 on the mounting base 2. After installation, the correction device is connected to the central control system, and sensors are installed in appropriate locations. When using the correction device, the sensors detect the offset of the steel box girder and provide feedback. The central control system sends a command, and the hydraulic cylinder 3 starts the telescopic shaft 4. Driven by the telescopic shaft 4, the correction component 5 moves, pushing the steel box girder to a certain displacement, thus achieving the correction purpose. During this process, the movement of the guide structure 6 does not affect the use of the correction component 5 and ensures its horizontal alignment.

[0021] According to the above implementation scheme, the correction component 5 includes a connecting seat 501, a threaded hole 502, a top roller 503, a pin 504, a threaded connector 505, and a locking nut 506. The threaded hole 502 is formed on the connecting seat 501, and the connecting seat 501 is connected to the stud 7 through the threaded hole 502. The top roller 503 is set on the connecting seat 501, and the connecting seat 501 and the top roller 503 are provided with through holes. The lower end of the pin 504 is provided with a baffle, and the pin 504 is located in the through hole. The threaded connector 505 is fixedly connected to the pin 504, and the upper end of the threaded connector 505 protrudes out of the through hole. The locking nut 506 is connected to the threaded connector 505.

[0022] When installing the alignment component 5, the top roller 503 is installed onto the connecting seat 501 using the pin 504, threaded joint 505, and locking nut 506. Then, the connecting seat 501 is fixed to the telescopic shaft 4 using the threaded hole 502 and stud 7. The alignment component 5 rotates the telescopic shaft 4 on the hydraulic cylinder 3 until the top roller 503 is horizontal. Next, the guide structure 6 is installed on the connecting seat 501, passing through the through hole 8. During alignment operations, the telescopic shaft 4 moves the connecting seat 501, which in turn moves the top roller 503, thus applying force to the steel box girder for alignment. During this process, the top roller 503 rolls and rubs against the side of the steel box girder, ensuring alignment accuracy.

[0023] According to the above implementation scheme, the guide structure 6 includes a connecting block 601, a mounting plate 602, a waist-shaped hole 603, a guide rod 604, an inner shaft 605, and a limiting plate 606. The connecting block 601 is fixedly connected to the mounting plate 602. The waist-shaped hole 603 is opened on the mounting plate 602, and the mounting plate 602 is fixed to the correction assembly 5 by mounting bolts. One end of the guide rod 604 is provided with a round hole, and the other end of the guide rod 604 is located in the through hole 8. The inner shaft 605 is fixedly connected to the limiting plate 606, and the inner shaft 605 is located in the round hole at the end of the guide rod 604. The upper end of the inner shaft 605 is threadedly connected to the connecting block 601.

[0024] When installing the guide structure 6, the mounting bolts are located inside the oblong hole 603. The connecting block 601 and mounting plate 602 are then installed onto the connecting seat 501 using mounting screws. Next, the guide rod 604 is inserted into the through hole 8, with the round hole at the end of the guide rod 604 aligned with the threaded hole on the connecting block 601. The inner shaft 605 on the limiting plate 606 is then inserted into the round hole, causing the upper end of the inner shaft 605 to be threadedly connected to the connecting block 601, thus completing the installation of the entire guide structure 6. During correction, the connecting seat 501 moves with the guide structure 6. The guide structure 6 ensures the horizontality of the connecting seat 501 and the top roller 503. Simultaneously, the guide rod 604 moves along the mounting seat 2 without affecting the normal movement of the correction assembly 5. The structure is simple and the performance is good.

[0025] It should be noted that, through the set correction component 5, the top material roller 503 is installed on the connecting seat 501 via the pin 504, threaded joint 505, and locking nut 506. During the correction process, the contact between the top material roller 503 and the steel box girder is a rolling contact. The friction generated by the rolling contact is small and will not affect the accuracy of the top material correction, thus achieving high precision in correction. The connecting seat 501 is connected to the end of the telescopic shaft 4, which facilitates installation and disassembly. The guide structure 6 is adopted, with one end connected to the correction component 5 and the other end connected through to the mounting seat 2. This ensures the horizontality of the correction component 5 and prevents the correction component 5 from rotating on the hydraulic cylinder 3 with the telescopic shaft 4, thus ensuring the accuracy of correction. The guide structure 6 is equipped with a mounting plate 602, guide rod 604, inner shaft 605, etc., which can be slightly rotated and adapted during installation without affecting the guidance, increasing the installation adaptability.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision steel box girder jacking and correction mechanism, comprising a temporary support (1), wherein the temporary support (1) is provided with a mounting base (2), and the mounting base (2) is provided with a hydraulic cylinder (3), wherein the hydraulic cylinder (3) is provided with a telescopic shaft (4), characterized in that: The end of the telescopic shaft (4) is connected to a correction component (5), and a guide structure (6) is connected to the correction component (5), which is connected to the mounting base (2).

2. The high-precision steel box girder pushing and correcting mechanism according to claim 1, characterized in that: The telescopic shaft (4) is provided with a stud (7) at its end, and the telescopic shaft (4) is connected to the correction assembly (5) through the stud (7).

3. The high-precision steel box girder pushing and correcting mechanism according to claim 2, characterized in that: The mounting base (2) is provided with a through hole (8), and the mounting base (2) is fixed to the temporary bracket (1) by screws, and a part of the guide structure (6) passes through the through hole (8).

4. The high-precision steel box girder pushing and correcting mechanism according to claim 3, characterized in that: The correction assembly (5) includes a connecting seat (501), a threaded hole (502), a top roller (503), a pin (504), a threaded joint (505), and a locking nut (506). The threaded hole (502) is opened on the connecting seat (501), and the connecting seat (501) is connected to the stud (7) through the threaded hole (502). The top roller (503) is set on the connecting seat (501), and the connecting seat (501) and the top roller (503) are provided with through holes. The lower end of the pin (504) is provided with a baffle, and the pin (504) is located in the through hole. The threaded joint (505) is fixedly connected to the pin (504), and the upper end of the threaded joint (505) protrudes through the through hole. The locking nut (506) is connected to the threaded joint (505).

5. The high-precision steel box girder pushing and correcting mechanism according to claim 4, characterized in that: The guide structure (6) includes a connecting block (601), a mounting plate (602), a waist-shaped hole (603), a guide rod (604), an inner shaft (605), and a limiting plate (606). The connecting block (601) is fixedly connected to the mounting plate (602). The waist-shaped hole (603) is opened on the mounting plate (602), and the mounting plate (602) is fixed to the correction assembly (5) by mounting bolts. One end of the guide rod (604) is provided with a round hole, and the other end of the guide rod (604) is located in the through hole (8).

6. The high-precision steel box girder pushing and correcting mechanism according to claim 5, characterized in that: The inner shaft (605) is fixedly connected to the limiting plate (606), and the inner shaft (605) is located in the round hole at the end of the guide rod (604). The upper end of the inner shaft (605) is threadedly connected to the connecting block (601).

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