Limiting and guiding device for incremental launching construction of steel box girder

Abstract

The utility model discloses a limiting and guiding device for steel box girder incremental launching construction, which belongs to the technical field of steel box girder incremental launching construction and comprises a base, a base plate is slidably connected to the top of the base, and a steel box girder body is placed at the top of the base plate. In the utility model, the rolling balls on the side parts of the two supporting plates abut against the side surface of the steel box girder body by utilizing the threaded fit between the bidirectional screw rod and the movable seat, and the supporting plates rotate under the reaction of the side surface of the steel box girder body, so that the rolling balls on the side parts of the supporting plates are ensured to be in complete contact with the side surface of the steel box girder body; the hydraulic rod is used for driving the brake fixing base and the brake fixing piece to move upwards, so that the top face of the brake fixing piece abuts against the bottom face of the brake fixing disc, the brake fixing disc, the rotating block and the supporting plate are fixed through friction force between the brake fixing disc and the brake fixing piece, the stability of the supporting plate is guaranteed, and meanwhile the limiting and guiding effects on the steel box girder body are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder jacking construction, and more specifically to a steel box girder jacking construction limiting guide device. Background Art

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. There are three methods for installing steel box girders: bracket installation, cantilever assembly, and jacking installation. The jacking method involves assembling the girder segment by segment at the bridgehead and using jacks to push it longitudinally into place, passing through temporary sliding bearings on the tops of piers or local supports. Guide devices are required to guide the bridge's forward trajectory during jacking. If the steel box girder deviates significantly from the jacking route, limiters are required to return the bridge to the intended jacking route.

[0003] The two rails are connected by a plurality of grooves, and the two rails are connected by a plurality of grooves, and the two rails are connected by a plurality of grooves.

[0004] However, the above patent has the following shortcomings: when the ratchet teeth and the block in the ratchet assembly are used to fix the support plate, the connecting plate, and the rotating shaft, it is necessary to ensure that the positions of the ratchet teeth and the block correspond to each other. When the balls on the support plate and the side of the box beam abut against each other, it is difficult to ensure that the ratchet teeth and the block can be stably engaged, which affects the support effect. In addition, the box beam is heavy, and the strength of the support plate supported by the support rod alone is insufficient. To this end, we proposed a limit guide device for the jacking construction of steel box beams. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a limit guide device for jacking construction of steel box beams.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring, and castor is arranged on the pin of base bottom four, to carry mobile handler location.

[0008] As a preferred solution of the present invention, the support mechanism includes a lower rotating seat fixedly connected to the top surface of the skateboard and an upper rotating seat fixedly connected to the bottom surface of the support plate, the upper rotating seat is rotatably connected to an upper rotating block, the bottom end of the upper rotating block is fixedly connected to a support frame, the bottom surface of the support frame is provided with a through hole, the lower rotating seat is rotatably connected to the lower rotating block, the top of the lower rotating block is fixedly connected to a screw, the screw is movably sleeved into the inner cavity of the through hole, the outer thread of the screw is sleeved with two nuts, the ground of one upper rotating block is in contact with the bottom surface of the inner cavity of the support frame, and the top surface of the other upper rotating block is in contact with the bottom surface of the support frame.

[0009] As a preferred solution of the present invention, the moving mechanism includes a moving groove arranged inside the base and a brake motor fixedly installed on the side of the base, two sliding grooves are opened at the top of the inner cavity of the moving groove, and the inner cavity of the moving groove is rotatably connected to a bidirectional screw rod, and the outer sides of the two ends of the bidirectional screw rod are respectively threadedly installed with moving seats, and the top ends of the two moving seats respectively pass through the sliding grooves and extend to the top of the base and are connected to the bottom surface of the slide, and the output shaft of the brake motor is connected to the end of the bidirectional screw rod.

[0010] As a preferred solution of the present invention, the bottom surface of the slide plate and the top surface of the base are in contact with each other.

[0011] As a preferred solution of the present invention, the outer diameter of the screw is equal to the inner diameter of the perforation.

[0012] As a preferred solution of the present invention, the side surface of the movable seat is in contact with the inner wall of the movable groove.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the present invention, the threaded fit between the bidirectional screw and the movable seat enables the rolling balls on the sides of the two support plates to abut against the side surfaces of the steel box girder body. At the same time, the support plates rotate under the reaction of the side surfaces of the steel box girder body, ensuring that the rolling balls on the sides of the support plates are in complete contact with the side surfaces of the steel box girder body. In addition, the hydraulic rod is used to drive the brake seat and the brake plate to move upward, so that the top surface of the brake plate and the bottom surface of the brake disc abut against each other. The friction between the brake disc and the brake plate is used to fix the brake disc, the rotating block and the support plate, thereby ensuring the stability of the support plate and the effect of limiting and guiding the steel box girder body.

[0015] (2) In the present invention, by using the upper rotating seat, the lower rotating seat, the lower rotating block, the screw, the nut, the upper rotating block, the support frame, and the perforation, when the rolling ball on the side of the support plate limits and guides the steel box girder body, the support plate is supported by the support mechanism and the slide plate, thereby ensuring the strength of the support plate and the rolling ball in guiding and limiting the steel box girder body, and avoiding the problem of poor support strength of the support plate when relying solely on the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the skateboard of the utility model;

[0019] Figure 4 This is a structural diagram of the support plate of the utility model;

[0020] Figure 5 This is a schematic diagram of the disassembly of the support mechanism of the utility model.

[0021] Description of the numbers in the figure:

[0022] 1. Base; 2. Moving mechanism; 3. Pad; 4. Steel box girder body; 5. Slide plate; 6. Support frame; 7. Rotating block; 8. Support plate; 9. Rolling ball; 10. Brake plate; 11. Mounting seat; 12. Hydraulic rod; 13. Brake seat; 14. Brake plate; 15. Support mechanism; 16. Upper rotating seat; 17. Lower rotating seat; 18. Lower rotating block; 19. Screw; 20. Nut; 21. Upper rotating block; 22. Support frame; 23. Perforation; 24. Moving slot; 25. Slide slot; 26. Brake motor; 27. Bidirectional screw; 28. Moving seat. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Example:

[0027] See also Figure 1-5 A steel box girder jacking construction limiting guide device includes a base 1, a pad 3 is slidably connected to the top of the base 1, a steel box girder body 4 is placed on the top of the pad 3, a moving mechanism 2 is provided on the base 1, and two slides 5 are provided on the moving mechanism 2. The top surfaces of the two slides 5 are respectively fixedly connected to support frames 6, and the inner sides of the tops of the two support frames 6 are respectively rotatably connected to rotating blocks 7. The tops of the two rotating blocks 7 are both fixedly connected to support plates 8, and the tops of the support plates 8 are clamped with multiple rolling balls 9. The rolling balls 9 The end face is in contact with the side of the steel box girder body 4, and the two ends of the rotating shaft of the rotating block 7 extend to both sides of the support frame 6 and are fixedly sleeved with a brake disc 10. The outer side of the support frame 6 is fixedly connected with a mounting seat 11, and a hydraulic rod 12 is fixedly installed on the mounting seat 11. The output end of the hydraulic rod 12 is fixedly connected to a brake seat 13, and the top of the brake seat 13 is fixedly connected to a brake plate 14. The top surface of the brake plate 14 is in contact with the bottom surface of the brake disc 10, and a support mechanism 15 is respectively provided between the support plate 8 and the slide plate 5.

[0028] For details, please refer to Figure 1 、 Figure 3 and Figure 5 The supporting mechanism 15 includes a lower rotating seat 17 fixedly connected to the top surface of the slide plate 5 and an upper rotating seat 16 fixedly connected to the bottom surface of the support plate 8. The upper rotating seat 16 is rotatably connected to an upper rotating block 21, and the bottom end of the upper rotating block 21 is fixedly connected to a support frame 22. The bottom surface of the support frame 22 is provided with a through hole 23. The lower rotating seat 17 is rotatably connected to a lower rotating block 18. The top of the lower rotating block 18 is fixedly connected to a screw 19, which is movably sleeved into the inner cavity of the through hole 23. Two nuts 20 are threadedly sleeved on the outer side of the screw 19. The ground of one upper rotating block 21 is in contact with the bottom surface of the inner cavity of the support frame 22, and the top surface of the other upper rotating block 21 is in contact with the bottom surface of the support frame 22.

[0029] In this embodiment, two nuts 20 are used to connect the screw rod 19 and the support frame 22 .

[0030] For details, please refer to Figure 1 and Figure 2 The moving mechanism 2 includes a moving groove 24 arranged inside the base 1 and a brake motor 26 fixedly installed on the side of the base 1. Two slide grooves 25 are opened at the top of the inner cavity of the moving groove 24. The inner cavity of the moving groove 24 is rotatably connected with a bidirectional screw rod 27. The outer sides of the two ends of the bidirectional screw rod 27 are respectively threadedly installed with moving seats 28. The top ends of the two moving seats 28 respectively pass through the slide grooves 25 and extend to the top of the base 1 and are connected to the bottom surface of the slide plate 5. The output shaft of the brake motor 26 is connected to the end of the bidirectional screw rod 27.

[0031] In this embodiment, the threaded cooperation between the bidirectional screw 27 and the two movable seats 28 is used to drive the two movable seats 28 closer to each other, so that the rolling balls 9 on the support plate 8 and the side surfaces of the steel box beam body 4 are abutted against each other, thereby limiting and guiding the steel box beam body 4.

[0032] For details, please refer to Figure 1 , the bottom surface of the slide plate 5 and the top surface of the base 1 are in contact with each other.

[0033] In this embodiment, the top surface of the base 1 is used to support the slide 5 , thereby ensuring the stability of the support mechanism 15 on the slide 5 in supporting the support plate 8 .

[0034] For details, please refer to Figure 5 , the outer diameter of the screw 19 is equal to the inner diameter of the through hole 23.

[0035] In this embodiment, the stability of the screw rod 19 moving in the through hole 23 is ensured.

[0036] For details, please refer to Figure 2 , the side surface of the movable seat 28 is in contact with the inner wall of the movable groove 24 .

[0037] In this embodiment, the inner wall of the movable groove 24 is used to limit the movable seat 28 so that the movable seat 28 can only move along the axial direction of the bidirectional screw rod 27 .

[0038] Working principle: When in use, first place the steel box girder body 4 on the pad 3 on the top of the base 1, start the brake motor 26 to drive the bidirectional screw 27 to rotate, and drive the two moving seats 28 to approach each other through the threaded fit between the bidirectional screw 27 and the two moving seats 28. Use the two moving seats 28 to drive the two slides 5 to approach each other, so that the multiple balls 9 on the side of the support plate 8 above the slide 5 are against the side of the steel box girder body 4. At the same time, the support plate 8 is rotated by the reaction force of the steel box girder body 4. At this time, the support frame 22 and the screw 19 are movable and retracted, and then the hydraulic rod 12 is started to drive the brake seat 13 and the brake plate 14 to move upward, so that the top surface of the brake plate 14 and the bottom of the brake disc 10 are aligned. The surfaces are against each other, and the friction between the brake disc 10 and the brake plate 14 is used to fix the brake disc 10, the rotating block 7 and the support plate 8, and then the two nuts 20 on the screw 19 are rotated respectively, so that the bottom surface of one nut 20 is in contact with the bottom surface of the inner cavity of the support frame 22, and the top surface of the other nut 20 is in contact with the bottom surface of the support frame 22. Finally, in the process of movement of the steel box girder body 4, the rolling balls 9 on the inside of the two support plates 8 are used to guide and limit the steel box girder body 4, and the support plate 8 is supported by the cooperation of the upper rotating seat 16, the upper rotating block 21, the support frame 22, the nut 20, the screw 19, the lower rotating block 18 and the lower rotating seat 17 to ensure the supporting strength of the support plate 8.

[0039] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and improved ideas of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel box girder jacking construction limiting guide device, comprising a base (1), characterized in that: The top of the base (1) is slidably connected to a pad (3), a steel box beam body (4) is placed on the top of the pad (3), a moving mechanism (2) is provided on the base (1), two slides (5) are provided on the moving mechanism (2), the top surfaces of the two slides (5) are respectively fixedly connected to support frames (6), the inner sides of the top ends of the two support frames (6) are respectively rotatably connected to rotating blocks (7), the top ends of the two rotating blocks (7) are both fixedly connected to support plates (8), a plurality of rolling balls (9) are clamped on the top of the support plates (8), and the end faces of the rolling balls (9) and the steel box beam body (4) are respectively fixedly connected. ), the two ends of the rotating block (7) shaft respectively extend to the two sides of the support frame (6) and are fixedly sleeved with a brake disc (10), the outer side of the support frame (6) is fixedly connected with a mounting seat (11), a hydraulic rod (12) is fixedly installed on the mounting seat (11), the output end of the hydraulic rod (12) is fixedly connected with a brake seat (13), the top end of the brake seat (13) is fixedly connected with a brake plate (14), the top surface of the brake plate (14) is in contact with the bottom surface of the brake disc (10), and a supporting mechanism (15) is respectively provided between the support plate (8) and the slide plate (5).

2. A steel box girder jacking construction limiting guide device according to claim 1, characterized in that: The support mechanism (15) comprises a lower rotating seat (17) fixedly connected to the top surface of the slide plate (5) and an upper rotating seat (16) fixedly connected to the bottom surface of the support plate (8); an upper rotating block (21) is rotatably connected to the upper rotating seat (16); the bottom end of the upper rotating block (21) is fixedly connected to the support frame (22); a through hole (23) is provided on the bottom surface of the support frame (22); a lower rotating block (18) is rotatably connected to the lower rotating seat (17); a screw (19) is fixedly connected to the top end of the lower rotating block (18); the screw (19) is movably sleeved into the inner cavity of the through hole (23); two nuts (20) are sleeved on the outer thread of the screw (19); the ground of one upper rotating block (21) is in contact with the bottom surface of the inner cavity of the support frame (22); and the top surface of the other upper rotating block (21) is in contact with the bottom surface of the support frame (22).

3. The steel box girder jacking construction limiting guide device according to claim 2, characterized in that: The moving mechanism (2) includes a moving groove (24) arranged inside the base (1) and a brake motor (26) fixedly installed on the side of the base (1), two slide grooves (25) are opened at the top of the inner cavity of the moving groove (24), and the inner cavity of the moving groove (24) is rotatably connected to a bidirectional screw rod (27), and the outer sides of the two ends of the bidirectional screw rod (27) are respectively threadedly installed with moving seats (28), and the top ends of the two moving seats (28) respectively pass through the slide grooves (25) and extend to the top of the base (1) and are connected to the bottom surface of the slide plate (5), and the output shaft of the brake motor (26) is connected to the end of the bidirectional screw rod (27).

4. The steel box girder jacking construction limiting guide device according to claim 1, characterized in that: The bottom surface of the slide plate (5) is in contact with the top surface of the base (1).

5. The steel box girder jacking construction limiting guide device according to claim 2, characterized in that: The outer diameter of the screw (19) is equal to the inner diameter of the through hole (23).

6. The steel box girder jacking construction limiting guide device according to claim 3, characterized in that: The side surface of the movable seat (28) is in contact with the inner wall of the movable groove (24).

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