Steel box girder and u rib welding auxiliary device

Abstract

This utility model discloses an auxiliary device for welding steel box girders and U-ribs, including several supporting longitudinal beams and supporting transverse beams. Guide rails are fixed on the two outermost supporting longitudinal beams. Each guide rail is provided with two guide moving seats and a moving seat fixing device. The guide moving seats on the two guide rails are arranged opposite to each other. A follower transverse beam is provided between the two opposite guide moving seats. A transverse beam lifting device is connected between the two ends of the follower transverse beam and the guide moving seats. A U-rib pressing device is installed at the bottom end of the follower transverse beam. This forms two sets of guide moving seats, moving seat fixing devices, follower transverse beams, transverse beam lifting devices, and U-rib pressing devices. One set is used to continuously press and fix the welding end of the U-rib, while the other set is moved and adjusted at any time until the U-rib spot welding task is completed. This ensures that the U-rib is fixed in position after being placed and will not be displaced due to external vibration or contact, which helps to improve its welding quality and thus ensures the uniformity of the stress on the steel box girder after it is put into use.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for steel box girder fabrication, and in particular to an auxiliary device for welding steel box girders and U-ribs. Background Technology

[0002] Steel box girders are a common type of steel structure main beam in bridge engineering. They consist of a top plate, a bottom plate, and a web. Several U-shaped reinforcing ribs, referred to as U-ribs, are welded onto the top and bottom plates. Some steel box girders also have U-ribs on the web to maximize load-bearing capacity. This results in a steel box girder with high rigidity and strong torsional resistance, making it widely used in long-span bridges (such as cable-stayed bridges and suspension bridges) and urban viaducts. During fabrication, U-ribs are typically installed through the top, bottom, or web plates. The length of the U-ribs corresponds to the length of the steel box girder. During installation, the U-ribs must fit tightly against the corresponding plates to ensure welding quality. Currently, U-ribs can only achieve clamping and fixing at the welding position during installation. Since construction workers need to operate on the surface of the plate during welding, the frequent movement of many people can easily cause vibration of the plate. This can cause the welding side of the longer U-ribs to be displaced due to vibration, resulting in a large deviation in the spacing of the U-ribs after welding. This can easily affect the uniformity of load distribution and transmission in the steel box girder. Moreover, the current auxiliary welding tools are limited in their positioning of the top plate, bottom plate, or web plate, lacking flexibility. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a steel box girder and U-rib welding auxiliary device that has a good fixing effect on U-ribs, is especially suitable for welding long U-ribs, has a good fixing effect during auxiliary welding, and has flexible and adjustable plate positioning.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a steel box girder and U-rib welding auxiliary device, including at least two parallel I-shaped support longitudinal beams, a support crossbeam connected between two adjacent support longitudinal beams, guide rails fixedly laid along the top ends of the two outermost support longitudinal beams, two guide moving seats rollingly engaged with each guide rail, a moving seat fixing device installed on each guide moving seat, and the moving seat fixing device abutting against the corresponding support longitudinal beam, the guide moving seats on the two guide rails are arranged opposite to each other, a follower crossbeam is provided between the two opposite guide moving seats, a crossbeam lifting device is connected between the two ends of the follower crossbeam and the corresponding guide moving seat, and a U-rib clamping device is installed at the bottom end of the follower crossbeam.

[0005] As a preferred technical solution, at least two of the supporting crossbeams are provided with a plate positioning device on one side for positioning the plate of the steel box girder.

[0006] As a preferred technical solution, the plate positioning device includes at least two positioning square holes arranged linearly on the support beam, and a positioning block is detachably inserted into one of the positioning square holes.

[0007] As a preferred technical solution, the movable seat fixing device includes a fixing claw that is rotatably assembled with the guide movable seat. When the guide movable seat is fixed by the movable seat fixing device, the top end of the fixing claw is tightly abutted against the support longitudinal beam.

[0008] As a preferred technical solution, the fixing claw is fixed with an anti-slip rubber pad at the abutment position of the supporting longitudinal beam.

[0009] As a preferred technical solution, a hanging rope is connected to the outer side of the fixed claw, and a hanging hook for use with the hanging rope is fixedly installed on the guide moving seat above the fixed claw.

[0010] As a preferred technical solution, the U-rib clamping device includes a clamping crossbar fixedly installed at the bottom end of the following crossbeam and arranged parallel to it. At least two U-rib pressure heads that cooperate with the top end of the U-rib are slidably mounted on the clamping crossbar, and each U-rib pressure head is provided with an adjusting locking bolt between it and the clamping crossbar.

[0011] As a preferred technical solution, the U-rib pressure head includes a mounting rod, the clamping crossbar is disposed through the mounting rod, the adjusting locking bolt is threaded onto the mounting rod, and the bottom end of the mounting rod is detachably connected to a clamping elbow.

[0012] As an improvement to the above technical solution, the beam lifting device includes an adjusting screw that is threadedly engaged with the guide moving seat. The bottom end of the adjusting screw is rotatably assembled with the corresponding follower beam, and an adjusting handwheel is installed at the top end of the adjusting screw.

[0013] Due to the adoption of the above technical solution, the auxiliary device for welding steel box girders and U-ribs includes at least two parallel I-shaped support longitudinal beams. A support crossbeam is arranged and connected between two adjacent support longitudinal beams. Guide rails are fixedly laid along the tops of the two outermost support longitudinal beams. Two guide movable seats are in rolling cooperation with each guide rail. Each guide movable seat is equipped with a movable seat fixing device, and the movable seat fixing device abuts against the corresponding support longitudinal beam. The guide movable seats on the two guide rails are arranged opposite to each other, and a follower crossbeam is provided between the two opposite guide movable seats. A crossbeam lifting device is connected between both ends and the corresponding guide moving seat, and a U-rib clamping device is installed at the bottom end of the following crossbeam. This utility model has the following beneficial effects: it forms two sets of guide moving seats, moving seat fixing devices, following crossbeams, crossbeam lifting devices and U-rib clamping devices. During the entire welding process of the U-rib, one set is used to continuously clamp and fix the welding end of the U-rib, while the other set is moved and adjusted at any time until the U-rib spot welding task is completed. This makes the position of the U-rib fixed after it is placed, and it will not be displaced due to external vibration or contact. This helps to improve its welding quality, thereby ensuring the uniformity of the stress on the steel box girder after it is put into use. Attached Figure Description

[0014] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0017] Figure 3 This is a side view of the usage state of an embodiment of this utility model;

[0018] In the diagram: 1-Supporting longitudinal beam; 2-Supporting crossbeam; 3-Sheet metal; 4-U-rib; 5-Guide rail; 6-Guide moving seat; 7-Following crossbeam; 8-Adjusting screw; 9-Adjusting handwheel; 10-Pressure crossbar; 11-Installation rod; 12-Pressure elbow; 13-Fixing claw; 14-Anti-slip rubber pad; 15-Hanging rope; 16-Hanging hook; 17-Positioning square hole; 18-Positioning block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the auxiliary device for welding steel box girders and U-ribs is used to press and fix the U-ribs 4 when welding and assembling them on the top plate, bottom plate, or web of the steel box girder, so that the U-ribs 4 can make close contact with the plate 3, thereby improving the welding quality and welding speed of the U-ribs 4. It includes at least two parallel I-shaped support longitudinal beams 1, and a support crossbeam 2 is arranged between adjacent support longitudinal beams 1. In this embodiment, only two support longitudinal beams 1 are used, which, together with the support crossbeams 2, form a support platform for the welding operation. The support crossbeams 2 are arranged in two layers between the support longitudinal beams 1, with the upper layer of support crossbeams 2 flush with the top surface of the support longitudinal beams 1. In use, the plate 3 forming the steel box girder is placed on the upper support crossbeam 2, and the U-ribs 4 to be welded are laid parallel to the plate 3.

[0021] Guide rails 5 are fixedly laid along the top ends of the two outermost supporting longitudinal beams 1. Two guide movable seats 6 are rolled in cooperation with each guide rail 5. Rollers are installed at the bottom of each guide movable seat 6, and the rollers are limited within the guide rail 5. The guide movable seats 6 on the two guide rails 5 are arranged opposite each other, and a follower crossbeam 7 is provided between the two opposite guide movable seats 6. A crossbeam lifting device is connected to the corresponding guide movable seat 6 at both ends of the follower crossbeam 7. A U-rib clamping device is installed at the bottom end of the follower crossbeam 7. In use, the U-rib clamping device can be lowered by the crossbeam lifting device until it contacts and clamps the top end of each U-rib 4, after which spot welding can be performed. Each guide movable seat 6 is equipped with a movable seat fixing device, and the movable seat fixing device abuts against the corresponding supporting longitudinal beam 1. The movable seat fixing device can realize the relative fixation between the guide movable seat 6 and the corresponding guide rail 5, so as to facilitate the pressing operation of the U rib 4 by the crossbeam lifting device, thereby preventing the guide movable seat 6 from unnecessary displacement or shaking due to the pressing operation, and indirectly changing its position by the contact between the follower crossbeam 7, the U rib pressing device and the U rib 4, thereby improving the positioning effect of the U rib 4 and ensuring the welding quality.

[0022] Specifically, the beam lifting device includes an adjusting screw 8 that is threadedly engaged with the guide moving seat 6. The bottom end of the adjusting screw 8 is rotatably assembled with the corresponding follower beam 7, and the top end of the adjusting screw 8 is equipped with an adjusting handwheel 9. By rotating the adjusting handwheel 9, the height of the follower beam 7 changes due to the threaded engagement between the adjusting screw 8 and the guide moving seat 6, until the U-rib pressing device is in close contact with the U-rib 4, thereby pressing it down to facilitate spot welding operations.

[0023] The U-rib clamping device includes a clamping crossbar 10 fixedly installed at the bottom end of the following crossbeam 7 and arranged parallel to it. At least two U-rib clamping heads that mate with the top of the U-rib 4 are slidably mounted on the clamping crossbar 10, and each U-rib clamping head is provided with an adjusting locking bolt between itself and the clamping crossbar 10. The U-rib clamping head can slide along the clamping crossbar 10 to adapt to the welding distance of the U-rib 4. After the position of the U-rib clamping head is adjusted, it can be locked in place using the adjusting locking bolt. The operation is simple and convenient. The U-rib clamping head includes a mounting rod 11, through which the clamping crossbar 10 passes. The adjusting locking bolt is threaded onto the mounting rod 11, and a clamping elbow 12 is detachably connected to the bottom end of the mounting rod 11. In use, the clamping elbow 12 abuts against the top of the U-rib 4 to press it down, ensuring tight contact between it and the plate 3, thereby guaranteeing welding quality.

[0024] The movable seat fixing device of this embodiment includes a fixing claw 13 rotatably assembled with the guide movable seat 6. When the guide movable seat 6 is fixed by the movable seat fixing device, the top end of the fixing claw 13 is tightly abutted against the support longitudinal beam 1. The fixing claw 13 is rotatable. When it is necessary to fix the guide movable seat 6, it is rotated inward until the top end of the fixing claw 13 abuts against the outer wing of the support longitudinal beam 1, so as to facilitate the adjustment of the height of the clamping elbow 12 by the adjusting handwheel 9. When it is necessary to move the guide movable seat 6, the fixing claw 13 is rotated outward to release its abutment against the outer wing of the support longitudinal beam 1, and the clamping elbow 12 is raised by the adjusting handwheel 9 to disengage from the U-rib 4, so that the guide movable seat 6 can be easily moved horizontally.

[0025] An anti-slip rubber pad 14 is fixed at the abutment position between the fixing claw 13 and the supporting longitudinal beam 1 to improve the fixing effect. Figure 3As shown, a hanging rope 15 is connected to the outside of the fixed claw 13. A hanging hook 16, which works in conjunction with the hanging rope 15, is fixedly installed on the guide moving seat 6 above the fixed claw 13. When the fixed claw 13 is released from fixing the guide moving seat 6, the hanging rope 15 can be hooked onto the hanging hook 16, so that the fixed claw 13 remains in an outward rotating state to prevent it from obstructing the movement of the guide moving seat 6.

[0026] In use, the plate 3 can be positioned using the inner side of the guide rail 5. However, since the actual width of the plate 3 varies during use, the fixed positioning position makes it inconvenient to arrange the U-rib 4, and makes it difficult to better match the position of the edge pressing elbow 12 with the outer U-rib 4. Therefore, in this embodiment, a plate positioning device is provided on one side of at least two of the supporting beams 2 to facilitate the positioning of the plate 3, thereby improving the flexibility of the plate 3 positioning and enabling the U-rib 4 and the pressing elbow 12 to better adapt. Specifically, the plate positioning device includes at least two positioning square holes 17 arranged linearly on the supporting beam 2. A positioning block 18 is detachably and limitly inserted into one of the positioning square holes 17. The bottom of the positioning block 18 is provided with an insertion square post that matches the insertion of the positioning square hole 17, making the positioning block 18 more stable after assembly and convenient for use. When three or more positioning blocks 18 are set, each positioning block 18 should be located on the same straight line and parallel to the guide rail 5, so that the edge of the plate 3 can be placed against it for positioning, and prevent it from affecting the arrangement and installation of the U-rib 4 due to tilting. After the plate positioning device is set, the placement position of the edge of the plate 3 can be changed, so that the distance between it and the outermost clamping elbow 12 can be further adjusted, so that it can be better adapted to the U-rib 4 and the clamping elbow 12.

[0027] Through the above design, this embodiment actually forms two sets of structures for pressing and fixing the U-rib 4. One set is always fixed at the end of the U-rib 4, while the other set can be adjusted at any time as the spot welding task progresses, so that the U-rib 4 has better fixation throughout the welding process and the spacing does not change, which helps to improve the quality of the steel box girder.

[0028] The description of this utility model is given for illustrative and descriptive purposes only, and is not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A welding auxiliary device for steel box girder and U-rib, comprising at least two parallel I-shaped support longitudinal beams, wherein a support crossbeam is arranged and connected between two adjacent support longitudinal beams, characterized in that: Guide rails are fixedly laid at the top of the two outermost support longitudinal beams, and two guide movable seats are rolled in cooperation with each guide rail. Each guide movable seat is equipped with a movable seat fixing device, and the movable seat fixing device abuts against the corresponding support longitudinal beam. The guide movable seats on the two guide rails are arranged opposite to each other, and a follower crossbeam is provided between the two opposite guide movable seats. The two ends of the follower crossbeam are connected to the corresponding guide movable seats by crossbeam lifting devices, and a U-rib clamping device is installed at the bottom end of the follower crossbeam.

2. The auxiliary device for welding steel box girders and U-ribs as described in claim 1, characterized in that: At least two of the supporting beams are provided with a plate positioning device on one side for positioning the plate of the steel box girder.

3. The auxiliary device for welding steel box girders and U-ribs as described in claim 2, characterized in that: The plate positioning device includes at least two positioning square holes arranged linearly on the support beam, one of which has a positioning block removably inserted into it.

4. The auxiliary device for welding steel box girders and U-ribs as described in claim 1, characterized in that: The movable seat fixing device includes a fixing claw that is rotatably assembled with the guide movable seat. When the guide movable seat is fixed by the movable seat fixing device, the top end of the fixing claw is tightly abutted against the support longitudinal beam.

5. The auxiliary device for welding steel box girders and U-ribs as described in claim 4, characterized in that: The fixed claw is fixed with an anti-slip rubber pad at the abutment position of the supporting longitudinal beam.

6. The auxiliary device for welding steel box girders and U-ribs as described in claim 4, characterized in that: A hanging rope is connected to the outside of the fixed claw, and a hanging hook that works in conjunction with the hanging rope is fixedly installed on the guide moving seat above the fixed claw.

7. The auxiliary device for welding steel box girders and U-ribs as described in claim 1, characterized in that: The U-rib clamping device includes a clamping crossbar fixedly installed at the bottom end of the following crossbeam and arranged parallel to it. At least two U-rib pressure heads that cooperate with the top of the U-rib are slidably mounted on the clamping crossbar, and each U-rib pressure head is provided with an adjusting locking bolt between it and the clamping crossbar.

8. The auxiliary device for welding steel box girders and U-ribs as described in claim 7, characterized in that: The U-rib pressure head includes a mounting rod, a clamping crossbar is provided through the mounting rod, an adjusting locking bolt is threaded onto the mounting rod, and a clamping elbow is detachably connected to the bottom end of the mounting rod.

9. The auxiliary device for welding steel box girders and U-ribs as described in claim 1, characterized in that: The beam lifting device includes an adjusting screw that is threadedly engaged with the guide moving seat. The bottom end of the adjusting screw is rotatably assembled with the corresponding follower beam, and an adjusting handwheel is installed at the top end of the adjusting screw.

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