Movable welding platform for steel box girder cantilever

Abstract

The utility model discloses a movable welding platform of a steel box girder cantilever, which relates to the field of bridge construction design, and comprises a cantilever frame, a movable welding platform, a movable welding platform, a movable welding platform and a movable welding platform, and the cantilever frame encircles a cantilever inside and can move on a steel box girder along the length direction of the steel box girder; the cantilever frame comprises an operation platform, and the operation platform is located below the cantilever. A sliding plate is arranged at one end, close to the steel box girder, of the operation surface of the operation platform, and the sliding plate can slide in the direction close to or away from the steel box girder and partially slide out of the operation surface; and a lifting platform is fixed on the sliding plate. By adopting the scheme, the length and the height of the device can be directly changed on the lower operation platform so as to adapt to cantilevers with various sizes.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction design, specifically to a movable welding platform for cantilevered steel box girders. Background Technology

[0002] The steel box girder consists of a box body and cantilever. During cantilever installation, the top plate of the cantilever is first aligned with the top plate of the box body and fixed with mounting plates. Then, the cantilever is welded to the box body. The welding process is mainly carried out below the cantilever.

[0003] In the existing technology, the movable welding platform of the cantilever is usually customized in size. When used with different cantilever lengths and widths, operators may not be able to reach the bottom corners of the cantilever for welding, which limits its application scenarios. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention aims to provide a movable welding platform for steel box girder cantilever. With this solution, the length and height can be directly adjusted on the operating platform below to accommodate cantilever of various sizes.

[0005] This utility model is achieved through the following technical solution:

[0006] A movable welding platform for cantilevered steel box girders, comprising:

[0007] A cantilever frame that encloses the cantilever and is movable along the length of the steel box girder;

[0008] The cantilever frame includes an operating platform located below the cantilever; the operating surface of the operating platform has a sliding plate at one end near the steel box girder, the sliding plate being able to slide towards or away from the steel box girder, and slide into or partially slide out of the operating surface;

[0009] A lifting platform is fixed on the skateboard.

[0010] Compared to existing technologies where movable welding platforms for cantilever beams are typically customized in size, limiting their application scenarios when used with cantilever beams of varying lengths and widths, operators may be unable to reach the bottom corners for welding. This invention addresses this limitation by providing a movable welding platform for steel box girder cantilever beams. This solution allows for direct adjustment of the platform's length and height on the lower operating platform to accommodate cantilever beams of various sizes. Specifically, the platform includes a cantilever frame comprising an upper transverse traveling frame and a lower operating platform. The transverse traveling frame moves along the steel box girder via rollers at its bottom. The operating platform has a sliding plate at one end, which extends along its plane towards the side wall of the steel box girder, thus altering the platform's length. A lifting platform is also fixed to the sliding plate, allowing for height adjustment and accommodating various cantilever beam sizes.

[0011] To facilitate the attachment of the sliding plate to the side wall of the steel box girder and its fixation by adsorption, an electromagnet is attached to the end of the sliding plate closest to the steel box girder. When the electromagnet is energized, it adheres to the steel box girder, thus securing the sliding plate and reducing its swaying during operation.

[0012] To improve connection strength, a plate is installed at one end of the sliding plate near the steel box girder, and the plate is provided with several electromagnets along the length of the steel box girder.

[0013] As a specific implementation method for driving the skateboard to slide, the operating platform is also equipped with a first telescopic cylinder, which is used to drive the skateboard to slide.

[0014] As a redundancy solution, the lifting platform is a scissor lift.

[0015] To avoid cantilever load, the cantilever frame includes a transverse traveling frame that extends along the bottom edge of the steel box girder and has traveling rollers. The transverse traveling frame spans the cantilever and travels on top of the steel box girder.

[0016] To facilitate stable movement of the cantilever frame, a sliding chamber is formed inside the bottom edge of the transverse walking frame. The bottom of the sliding chamber has a slide rail, on which a counterweight box is slidably connected. The counterweight box can slide along the length of the transverse walking frame. This design changes the conventional counterweight method. Since existing counterweights are placed at the top of the frame, their elevation is difficult to determine. Therefore, this invention places the counterweight box at the bottom of the transverse walking frame, lowering its center of gravity, thus achieving stable movement with a smaller weight. Furthermore, by using a sliding counterweight box, the transverse position of the center of gravity can be changed by sliding the counterweight box laterally to adapt to cantilever lengths. Additionally, several sandbags can be directly placed inside the counterweight box, and these sandbags can be filled with mud or sand on-site for rapid counterweighting.

[0017] To facilitate the rapid loading and unloading of the counterweight, the sliding chamber has an opening at one end away from the cantilever, and the counterweight box can partially slide out of the opening end of the sliding chamber; the end of the counterweight box facing the opening end of the sliding chamber has an opening and closing door.

[0018] To facilitate support at the end of the counterweight box when it slides out, the bottom of the counterweight box at the opening and closing door has a placement groove. A hydraulic telescopic rod is installed in the placement groove. The hydraulic telescopic rod is hinged inside the placement groove and can drive the output end of the hydraulic telescopic rod to rotate out or into the placement groove.

[0019] The output end of the hydraulic telescopic rod is equipped with a support block; the side wall of the placement slot is also equipped with a sliding baffle, one end of which extends into the side wall of the placement slot, and the other end of which extends into the placement slot and into the rotation path of the support block. In this design, when the counterweight needs to be placed, the counterweight box is slid out. Due to the restriction of the sliding baffle, the hydraulic telescopic rod is located in the placement slot. Then, the sliding baffle is retracted to the side wall of the placement slot, causing the sliding baffle to release the support block. At this time, the hydraulic telescopic rod rotates out of the placement slot and is perpendicular to the bottom of the counterweight box, so that the support block supports the top of the steel box girder. Finally, the extension of the hydraulic telescopic rod is controlled to achieve support; multiple hydraulic telescopic rods can be installed.

[0020] As a specific embodiment of driving the counterweight box to slide, a second telescopic cylinder is also provided in the sliding chamber, which is used to drive the counterweight box to slide.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] 1. This utility model provides a movable welding platform for steel box girder cantilever. Using this solution, the length and height can be directly changed on the operating platform below to adapt to cantilever of various sizes.

[0023] 2. This utility model provides a movable welding platform for a steel box girder cantilever. Using this solution, the counterweight box is positioned at the bottom of the transverse walking frame, lowering its center of gravity, thus enabling stable movement with a smaller weight. Furthermore, by setting a sliding counterweight box, its transverse center of gravity can be changed by sliding the counterweight box laterally to adapt to cantilever lengths. Additionally, several sandbags can be directly placed inside the counterweight box, and these sandbags can be filled with mud and sand on-site for rapid counterweighting. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 A structural schematic diagram of the steel box girder provided by this utility model;

[0026] Figure 2 A schematic diagram of the cantilever frame provided by this utility model;

[0027] Figure 3 Top view of the skateboard provided by this utility model;

[0028] Figure 4 A schematic diagram of the counterweight box provided by this utility model.

[0029] The attached diagram shows the markings and corresponding component names:

[0030] 1-Cantilevered frame, 101-Operating platform, 102-Slide plate, 103-Horizontal walking frame, 104-Walking roller, 105-Sliding chamber, 2-Lifting platform, 3-Electromagnet, 4-Mounting plate, 5-First telescopic cylinder, 6-Counterweight box, 601-Opening door, 602-Placement slot, 7-Second telescopic cylinder, 8-Hydraulic telescopic rod, 9-Support block, 10-Sliding baffle. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0032] Example:

[0033] This embodiment provides a movable welding platform for cantilevered steel box girders, such as... Figures 1-4 As shown, it includes:

[0034] The cantilever frame 1 encloses the cantilever and can move along the length of the steel box girder on the steel box girder.

[0035] The cantilever frame 1 includes an operating platform 101 located below the cantilever; the operating surface of the operating platform 101 has a sliding plate 102 at one end near the steel box girder, and the sliding plate 102 can slide in a direction closer to or away from the steel box girder, and slide into or partially slide out of the operating surface;

[0036] A lifting platform 2 is fixed on the skateboard 102.

[0037] Compared to existing technologies, where movable welding platforms for cantilever beams are typically customized in size, operators may not be able to reach the bottom corners of the cantilever when used with different cantilever lengths and widths, limiting their application scenarios. This invention provides a movable welding platform for steel box girder cantilever beams. Using this solution, the length and height of the lower operating platform 101 can be directly varied to accommodate cantilever beams of various sizes. Specifically, the solution includes a cantilever frame 1, which comprises an upper transverse walking frame 103 and a lower operating platform 101. The transverse walking frame 103 travels on the steel box girder via rollers at its bottom, enabling the entire cantilever frame to move. The operating platform 101 has a sliding plate 102 at its end, which extends along its plane towards the side wall of the steel box girder, thereby changing the length of the operating platform 101. A lifting platform 2 is also fixed to the sliding plate 102, allowing the height to be adjusted, thus accommodating cantilever beams of various sizes.

[0038] To facilitate the contact of the sliding plate 102 against the side wall of the steel box girder and to fix the sliding plate 102 by adsorption, an electromagnet 3 is attached to the end of the sliding plate 102 near the steel box girder. The electromagnet 3 can be attracted to the steel box girder when energized, thus fixing the sliding plate 102 and reducing its shaking during operation.

[0039] To improve connection strength, the sliding plate 102 is mounted on a plate 4 near one end of the steel box girder, and the mounting plate 4 is provided with a plurality of electromagnets 3 along the length of the steel box girder.

[0040] As a specific implementation of driving the skateboard 102 to slide, the operating platform 101 is also provided with a first telescopic cylinder 5, which is used to drive the skateboard 102 to slide.

[0041] As a redundancy solution, the lifting platform 2 is a scissor lift.

[0042] To avoid cantilever load, the cantilever frame 1 includes a transverse traveling frame 103, which extends along the bottom edge of the steel box girder and has traveling rollers 104. The transverse traveling frame 103 spans the cantilever and travels on the top of the steel box girder.

[0043] To facilitate stable movement of the cantilever frame, a sliding chamber 105 is formed inside the bottom edge of the transverse walking frame 103. The bottom of the sliding chamber 105 has a slide rail, on which a counterweight box 6 is slidably connected. The counterweight box 6 can slide along the length of the transverse walking frame 103. This design changes the conventional counterweight method. Since existing counterweights are placed at the top of the frame, their elevation is difficult to determine. Therefore, this invention places the counterweight box 6 at the bottom of the transverse walking frame 103, lowering its center of gravity, thus achieving stable movement with a smaller weight. Furthermore, by setting a sliding counterweight box 6, its lateral position can be changed by sliding the counterweight box 6 laterally, adapting to cantilever lengths. Additionally, several sandbags can be directly placed inside the counterweight box 6, and these sandbags can be filled with mud or sand on-site for rapid counterweighting.

[0044] To facilitate the rapid loading and unloading of the counterweight, the sliding chamber 105 has an opening at one end away from the cantilever, and the counterweight box 6 can partially slide out of the opening end of the sliding chamber 105; the end of the counterweight box 6 facing the opening end of the sliding chamber 105 has an opening and closing door 601.

[0045] To facilitate support at the end of the counterweight box 6 when it slides out, the bottom of the counterweight box 6 at the opening and closing door 601 has a placement groove 602. A hydraulic telescopic rod 8 is provided in the placement groove 602. The hydraulic telescopic rod 8 is hinged inside the placement groove 602 and can drive the output end of the hydraulic telescopic rod 8 to rotate out or into the placement groove 602.

[0046] The hydraulic telescopic rod 8 has a support block 9 at its output end; the side wall of the placement slot 602 also has a sliding baffle 10, one end of which extends into the side wall of the placement slot 602, and the other end extends into the placement slot 602 and into the rotation path of the support block 9. In this scheme, when it is necessary to place the counterweight, the counterweight box 6 is slid out. Due to the restriction of the sliding baffle 10, the hydraulic telescopic rod 8 is located in the placement slot 602. Then, the sliding baffle 10 is retracted to the side wall of the placement slot 602, causing the sliding baffle 10 to release the support block 9. At this time, the hydraulic telescopic rod 8 is rotated out of the placement slot 602 and perpendicular to the bottom of the counterweight box 6, so that the support block 9 supports the top of the steel box beam. Finally, the extension of the hydraulic telescopic rod 8 is controlled to achieve support; multiple hydraulic telescopic rods 8 can be set.

[0047] As a specific embodiment of driving the counterweight box 6 to slide, the sliding chamber 105 is also provided with a second telescopic cylinder 7, which is used to drive the counterweight box 6 to slide.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A movable welding platform for cantilevered steel box girders, characterized in that, include: A cantilever frame (1) encloses the cantilever and can move along the length of the steel box girder on the steel box girder; The cantilever frame (1) includes an operating platform (101) located below the cantilever; the operating surface of the operating platform (101) has a sliding plate (102) at one end near the steel box girder, and the sliding plate (102) can slide in a direction closer to or away from the steel box girder, and slide into or partially slide out of the operating surface; A lifting platform (2) is fixed on the skateboard (102).

2. The movable welding platform for a cantilevered steel box girder according to claim 1, characterized in that, The sliding plate (102) has an electromagnet (3) at one end near the steel box girder.

3. The movable welding platform for a cantilevered steel box girder according to claim 2, characterized in that, The sliding plate (102) is mounted on a plate (4) near one end of the steel box girder. The plate (4) is provided with a plurality of electromagnets (3) along the length of the steel box girder.

4. The movable welding platform for a cantilevered steel box girder according to claim 1, characterized in that, The operating platform (101) is also equipped with a first telescopic cylinder (5), which is used to drive the slide plate (102) to slide.

5. The movable welding platform for a cantilevered steel box girder according to claim 1, characterized in that, The lifting platform (2) is a scissor lift.

6. The movable welding platform for a cantilevered steel box girder according to claim 1, characterized in that, The cantilever frame (1) includes a transverse traveling frame (103) that extends along the bottom edge of the steel box girder and has traveling rollers (104).

7. A movable welding platform for a cantilevered steel box girder according to claim 6, characterized in that, The transverse walking frame (103) has a sliding chamber (105) inside its bottom edge. The bottom of the sliding chamber (105) has a slide rail, and a counterweight box (6) is slidably connected to the slide rail. The counterweight box (6) can slide along the length of the transverse walking frame (103).

8. A movable welding platform for a cantilevered steel box girder according to claim 7, characterized in that, The sliding chamber (105) has an opening at one end away from the cantilever, and the counterweight box (6) can partially slide out of the opening end of the sliding chamber (105); the end of the counterweight box (6) facing the opening end of the sliding chamber (105) has an opening and closing door (601).

9. A movable welding platform for a cantilevered steel box girder according to claim 8, characterized in that, The counterweight box (6) is located at the bottom of the opening and closing door (601) and has a placement groove (602). A hydraulic telescopic rod (8) is provided in the placement groove (602). The hydraulic telescopic rod (8) is hinged inside the placement groove (602) and can drive the output end of the hydraulic telescopic rod (8) to rotate out or into the placement groove (602). The output end of the hydraulic telescopic rod (8) is equipped with a support block (9); the side wall of the placement groove (602) is also equipped with a sliding baffle (10), one end of the sliding baffle (10) extends into the side wall of the placement groove (602), and the other end of the sliding baffle (10) extends into the placement groove (602) and into the rotation path of the support block (9).

10. A movable welding platform for a cantilevered steel box girder according to claim 7, characterized in that, The sliding chamber (105) is also equipped with a second telescopic cylinder (7), which is used to drive the counterweight box (6) to slide.

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