Movable auxiliary device for welding and hoisting double parallel steel box girders

Abstract

According to the movable auxiliary device for welding and hoisting the double-width parallel steel box girders, wheels which make contact with a bridge floor and are used for assisting in adjusting the operation position are arranged at the four corners of the lower end of a bearing combined steel frame, the wheels make contact with the bridge floors on the corresponding sides of a double-width bridge, and the bearing combined steel frame and an operation platform are fixedly connected into a whole through a hanging frame. The bearing combined steel frame is provided with winch lifting equipment used for lifting materials. According to the utility model, the hanging frame arranged between the head end and the tail end of the double-width bridge is used for connecting the bearing combined steel frame of which the wheels at the lower end are in contact with the bridge surface and the operation platform arranged below the head end and the tail end of the double-width bridge in parallel, so that the defects in the prior art during welding and hoisting of two parallel double-width steel box girders are overcome, and on the premise of ensuring the safety of personnel, the safety of the double-width parallel steel box girders is ensured; the construction efficiency of operations such as welding of inlaying sections on the two sides of the double-width parallel steel box girder and hoisting and welding of decorative plates is improved, site construction is facilitated, and a suspension type structure is not limited by the lower environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel box girder welding and installation, and in particular relates to a movable auxiliary device for welding and hoisting of double-width parallel steel box girders. Background Art

[0002] As a bridge structure that is convenient and fast to construct, steel box girders are increasingly used in urban pedestrian overpasses, viaducts, highways, and railway bridge construction projects. Bridges are divided into single-span bridges and double-span bridges. Single-span steel box girder bridges are commonly used for ramp bridges, pedestrian overpasses, and low-grade highways, while double-span steel box girder bridges are mainly used for urban traffic arteries such as high-grade highways or viaducts.

[0003] According to the technical characteristics of steel box girder construction, it must first be divided into several segments for production in the factory, and then transported to the construction site for segment hoisting and welding. According to the actual construction and specification requirements, a patching section must be reserved at the joint of the cantilever segment of the steel box girder, and this patching section must be welded on site. At the same time, the connection between the cantilever segment of the steel box girder and the steel box girder segment is generally provided with a decorative plate, which must have a shape, but the decorative steel plate can only be installed after the main body of the steel box girder is built. The decorative steel plate is usually heavy. Since the lower part of the cantilever is suspended, it is difficult to install the entire decorative plate by manpower alone, and the accuracy is difficult to guarantee. During the construction of a double-span steel box girder bridge, generally both spans are constructed at the same time for the sake of progress. There is a gap between the two separated bridges of the double-span bridge. This is to avoid the mutual influence of different frequency vibrations caused by two opposite driving directions, thereby avoiding vibration damage or cracks to the connection parts between the bridges, and ensuring the safety of the bridge. The two bridges of the double-span structure are arranged side by side so that the adjacent steel box girder side plate bottom plates are close to each other. This gap is relatively narrow, and its width usually ranges from 0.3 meters to 1.5 meters. The most common gap in our construction is 0.5 meters to 1 meter. The difficulty of operation will be greatly increased when performing operations such as welding of patching sections and subsequent installation of decorative panels. In the prior art, cranes and various bowl-hook brackets are usually used to carry out operations. However, the use of cranes has limited space and poor flexibility. The amount of materials used in the bowl-hook bracket platform is large, the space is limited, the cost is high, and it is inconvenient to move. The cost of using a lifting vehicle is high, and bilateral welding and installation operations cannot be performed at the same time; and if the terrain is complex and the two bridge decks have a height difference design on high-speed sections, across rivers and other sections, the above method of construction is limited. The movable single-sided hanging device cannot meet the welding operation requirements of both sides of the bridge at the same time. The use of two single-sided hanging devices at the same time occupies a large working space on the bridge deck and may affect other construction. During construction, the progress of both sides will be affected by each other, resulting in low construction efficiency and increased costs. In this regard, in order to solve the shortcomings and deficiencies of the existing technology for welding and hoisting between the two spans of double-span parallel steel box girders, it is necessary to make improvements. Utility Model Content

[0004] The technical problem solved by the utility model is: to provide a movable auxiliary device for welding and hoisting of double-span parallel steel box girders, which connects the load-bearing combined steel frame where the lower end wheels contact the bridge deck and the operating platform arranged parallel to the lower end of the double-span bridge through a hanging frame arranged between the head and tail ends of the double-span bridge, thereby solving the shortcomings and deficiencies of the existing technology during welding and hoisting between the two spans of the double-span parallel steel box girders, and improving the construction efficiency of operations such as welding of the patching sections on both sides of the double-span parallel steel box girders and hoisting and welding of decorative panels on the premise of ensuring personnel safety. The utility model is simple to operate, convenient for on-site construction, and has a suspended structure that is not restricted by the lower environment.

[0005] The technical solution adopted by the utility model is as follows: a movable auxiliary device for welding and hoisting of double-width parallel steel box girders, comprising a load-bearing composite steel frame with adjustable height, a hanging frame located between the front and rear ends of the double-width bridge, and an operating platform located below the front and rear ends of the double-width bridge and arranged parallel to the bridge deck; wheels are provided at the four corners of the lower end of the load-bearing composite steel frame, which are in contact with the bridge deck and used for assisting in adjusting the working position, and the wheels are in contact with the bridge deck on the corresponding side of the double-width bridge; the load-bearing composite steel frame and the operating platform are fixedly connected as a whole through the hanging frame; and a winch lifting device for lifting materials is provided on the load-bearing composite steel frame.

[0006] Among them, the load-bearing composite steel frame includes a crossbeam, a circular frame and a height-adjustable column. The crossbeam is centrally fixed in the middle of the circular frame, and a diagonal brace is provided on the outside of the connection position between the crossbeam and the circular frame. The four corners of the bottom of the circular frame are fixed with height-adjustable columns, and the wheels with built-in brakes are installed at the lower end of the height-adjustable columns.

[0007] Furthermore, the height-adjustable column includes a fixed column and a movable column, both of which are hollow tubular structures, and a fixed column is fixed on the bottom surface of the end of the circular frame, and the upper end of the movable column is inserted into the interior of the fixed column through the lower port of the fixed column, and the movable column is fixedly connected to the fixed column by a bolt that passes through the through hole on the fixed column and is threadedly connected to the corresponding position on the movable column.

[0008] Furthermore, traction rings used for shifting the load-bearing combined steel frame are fixed on the outer walls at both ends of the front and rear side walls of the return frame.

[0009] Furthermore, winch lifting devices located outside the circular frame are fixed on the bottom surfaces of the front and rear ends of the crossbeam.

[0010] Furthermore, the hanging frame adopts a U-shaped frame structure welded from two front and rear uprights and a bottom beam arranged between the two uprights and fixedly connected to the lower ends of the uprights. The upper ends of the two uprights are located in a circular frame in the load-bearing combined steel frame and are fixedly connected to the bottom surface of the cross beam of the load-bearing combined steel frame. A ladder is fixed on the inner side wall of one of the uprights, and its upper and lower ends are respectively fixedly connected to the cross beam and the operating platform.

[0011] Furthermore, the operating platform includes an outer frame and a railing. The outer frame is centrally fixed on the bottom beam of the hanging frame, and a platform plate is fixedly connected to the bottom of the outer frame. The front and rear sides of the outer frame are provided with diagonal bracing rods located on both outer sides of the vertical poles in the hanging frame and fixedly connected to the side walls corresponding to the vertical poles. The outer frame is surrounded by railings fixedly connected to the platform columns thereon.

[0012] Furthermore, the platform plate is a perforated mesh plate or an aluminum mesh.

[0013] The advantages of this utility model compared with the prior art:

[0014] 1. This technical solution solves the shortcomings and deficiencies of the existing technology in welding and hoisting between the two spans of the double-span parallel steel box girders by connecting the load-bearing composite steel frame where the lower end wheels contact the bridge deck and the operating platform arranged parallel to the two spans of the double-span bridge through the hanging frame arranged between the two ends of the double-span bridge. On the premise of ensuring the safety of personnel, the construction efficiency of welding of the embedded sections on both sides of the double-span parallel steel box girders and hoisting and welding of decorative panels is improved;

[0015] 2. This technical solution is easy to operate, saves man-hours and improves efficiency. When welding the cantilever patching section of the steel box girder or installing the decorative panel, the entire mobile auxiliary device can be hoisted to the designated location for assembly and then used. It is easy to operate and can weld the sides and bottom of the bridge on both sides at the same time, thereby improving construction efficiency.

[0016] 3. The entire platform of this technical solution can be suspended on the bridge deck between the two steel box girders without causing damage to the original structure. At the same time, it can be freely moved along the length of the bridge for construction work. In areas with complex terrain and across rivers, installation and construction can still be carried out without restrictions;

[0017] 4. This technical solution adopts an assembled structure, which is convenient for on-site construction. All parts of the movable auxiliary device are bolted, which is convenient for installation, disassembly and transportation;

[0018] 5. The height-adjustable columns of this technical solution can be adjusted at will according to the site and can be reused in various bridge projects. The entire structure is made of ordinary steel or aluminum, the production and installation cost is very low, and the material itself can be recycled, which is in line with the development concept of cost reduction, efficiency improvement, green energy saving.

[0019] 6. This technical solution can be used for welding of the cantilever patching section of the steel box girder, installation of decorative panels, on-site touch-up and other post-painting operations. It can also be used for downpipe installation and local maintenance. It has a stable structure and good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the use state of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiment of the present utility model Figure 1-2 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0025] Movable auxiliary device for welding and hoisting of double parallel steel box girders, such as Figure 1-2As shown, it comprises a load-bearing composite steel frame 1 with adjustable height, a hanging frame 2 located between the front and rear ends of the double-span bridge, and an operating platform 3 located below the front and rear ends of the double-span bridge and arranged parallel to the bridge deck. The four corners of the lower end of the load-bearing composite steel frame 1 are all provided with wheels 1-4 that are in contact with the bridge deck and used to assist in adjusting the working position. The wheels 1-4 are in contact with the bridge deck on the corresponding side of the double-span bridge. The load-bearing composite steel frame 1 and the operating platform 3 are fixedly connected as a whole through the hanging frame 2. A winch lifting device 4 for lifting materials is provided on the load-bearing composite steel frame 1 for lifting materials. In the above structure, the load-bearing composite steel frame 1 whose lower end wheels 1-4 are in contact with the bridge deck and the operating platform 3 arranged parallel to the front and rear ends of the double-span bridge are connected by the hanging frame 2 located between the front and rear ends of the double-span bridge. This solves the shortcomings and deficiencies of the existing technology when welding and hoisting the two spans of the double-span parallel steel box girders. On the premise of ensuring the safety of personnel, the construction efficiency of welding of the patching sections on both sides of the double-span parallel steel box girders and hoisting and welding of decorative panels are improved.

[0026] The specific structure of the load-bearing composite steel frame 1 is as follows: the load-bearing composite steel frame 1 includes a crossbeam 1-1, a circular frame 1-2 and a height-adjustable column 1-3. The crossbeam 1-1 is centrally fixed in the middle of the circular frame 1-2, and a diagonal brace 1-6 is provided on the outside of the connection position between the crossbeam 1-1 and the circular frame 1-2. The four corners of the bottom of the circular frame 1-2 are all fixed with height-adjustable columns 1-3, and the wheels 1-4 with built-in brakes are installed at the lower end of the height-adjustable columns 1-3; the fixed connection method of the above-mentioned components is bolted, which is convenient for disassembly and assembly and reuse. Brakes are individually set at each wheel 1-4 to prevent slippage during construction and ensure the safety of construction workers.

[0027] The specific structure of the height-adjustable column 1-3 is as follows: the height-adjustable column 1-3 includes a fixed column 1-31 and a movable column 1-32, both of which are hollow tubular structures, and the fixed column 1-31 is fixed on the bottom surface of the end of the return frame 1-2, and the upper end of the movable column 1-32 is inserted into the interior of the fixed column 1-31 through the lower port of the fixed column 1-31, and the movable column 1-32 is fixedly connected to the fixed column 1-31 by a bolt that passes through the through hole on the fixed column 1-31 and is threadedly connected to the corresponding position on the movable column 1-32. By loosening the bolt used to fix the fixed column 1-31 and the movable column 1-32, the depth of the movable column 1-32 inserted into the fixed column 1-31 is adjusted to the required height of the height-adjustable column 1-3, and the bolt is rotated to lock the fixed column 1-31 and the movable column 1-32. It can be fixed, wherein the fixed column 1-31 is formed with no less than two through holes, and the movable column 1-32 is formed with a through hole threaded hole corresponding to the position of the through hole on the fixed column 1-31. If it is a through hole, a nut concentrically arranged on the inner wall of the movable column 1-32 can be fixed to the through hole; specifically, the outer walls at both ends of the front and rear side walls of the return frame 1-2 are fixed with traction rings 1-5 used for shifting the load-bearing combined steel frame 1, and the traction ring 1-5 can be used to move the entire platform manually or by connecting electric equipment to pull; specifically, the bottom surfaces of the front and rear ends of the beam 1-1 are fixed with winch lifting devices 4 located on the outside of the return frame 1-2; in the above structure, the height-adjustable column 1-3 is suitable for use on two bridge decks with different height differences, has a wide range of application, can adjust the height at will according to the site, and can be reused in various bridge projects.

[0028] The specific structure of the hanging frame 2 is as follows: the overall structure of the hanging frame 2 is a U-shaped structure. The hanging frame 2 adopts a U-shaped frame structure welded by two front and rear vertical poles 2-1 and a bottom beam 2-2 arranged between the two vertical poles 2-1 and fixedly connected to the lower end of the vertical pole 2-1. The upper ends of the two vertical poles 2-1 are located in the return frame 1-2 in the load-bearing combined steel frame 1 and are fixedly connected to the bottom surface of the crossbeam 1-1 of the load-bearing combined steel frame 1. A ladder 2-3 is fixed on the inner side wall of one of the vertical poles 2-1, and the upper and lower ends are respectively fixedly connected to the crossbeam 1-1 and the operating platform 3. The ladder beam of the ladder 2-3 is made of a small rectangular tube or angle steel on one side with the help of the structural vertical pole 2-1, and the ladder stool is made of round steel or threaded steel bars on site. The entire width is 600, which is convenient for operators to go up and down.

[0029] The specific structure of the operating platform 3 is as follows: the operating platform 3 includes an outer frame 3-1 and a railing 3-4. The outer frame 3-1 is centrally fixed on the bottom beam 2-2 of the hanging frame 2, and the bottom of the outer frame 3-1 is fixedly connected to a platform plate 3-2. The front and rear sides of the outer frame 3-1 are provided with diagonal braces 3-3 located on both sides of the vertical pole 2-1 in the hanging frame 2 and fixedly connected to the side walls corresponding to the vertical pole 2-1. The outer frame 3-1 is surrounded by railings 3-4 fixedly connected to the platform columns thereon; The platform plate 3-2 is a perforated mesh plate or an aluminum mesh, which plays an anti-slip and anti-falling role, and at the same time prevents water from accumulating on the platform when it rains and reduces the deadweight of the plate surface. Some work tools can be temporarily placed on the platform plate 3-2. Among them, the railing 3-4, the diagonal brace 3-3 and the outer frame 3-1, and the outer frame and the hanging bracket 2 are all fixedly connected by bolts. The railing 3-4 is made of round steel commonly seen on site, and can also be made of round tubes. In order to prevent high-altitude objects from falling, a layer of mesh plate or hollow aluminum plate is arranged outside the railing 3-4.

[0030] In the above structure, considering that the gap between the double-span bridges is narrow, the entire auxiliary device cannot be installed directly. The entire structure adopts a prefabricated structure to facilitate on-site construction. All parts of the mobile auxiliary device are bolted to facilitate disassembly, assembly and transportation.

[0031] This technical solution is easy to operate, saves man-hours and improves efficiency. When welding the cantilever patching section of the steel box girder or installing the decorative panel, the entire mobile auxiliary device can be hoisted to the designated location for assembly and then used. It is easy to operate and can weld the sides and bottom of the bridge on both sides at the same time, thereby improving construction efficiency.

[0032] The entire platform of this technical solution can be suspended on the bridge deck between the two steel box girders without causing damage to the original structure. At the same time, it can be moved freely along the length of the bridge for construction work. In areas with complex terrain or across rivers, installation and construction can still be carried out without restriction. The assembled structure is convenient for on-site construction, and all parts of the movable auxiliary device are bolted for easy installation and transportation. The entire structure is made of ordinary steel or aluminum, with very low production and installation costs, and the material itself is recyclable, which is in line with the development concept of cost reduction, efficiency improvement, and green energy conservation. It can carry out welding of the cantilever patching section of the steel box girder, installation of decorative panels, on-site touch-up and other post-painting operations, and can also be used for downpipe installation and local maintenance. It has a stable structure and good safety performance.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A movable auxiliary device for welding and hoisting of double-width parallel steel box girders, characterized by: The invention comprises a load-bearing composite steel frame (1) with adjustable height, a hanging frame (2) located between the front and rear ends of a double-span bridge, and an operating platform (3) located below the front and rear ends of the double-span bridge and arranged parallel to the bridge deck, wherein wheels (1-4) are arranged at the four corners of the lower end of the load-bearing composite steel frame (1) for contacting the bridge deck and assisting in adjusting the working position, and the wheels (1-4) are in contact with the bridge deck on the corresponding side of the double-span bridge, the load-bearing composite steel frame (1) and the operating platform (3) are fixedly connected as a whole via the hanging frame (2), and a winch lifting device (4) for lifting materials is arranged on the load-bearing composite steel frame (1).

2. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to claim 1 is characterized in that: The load-bearing composite steel frame (1) comprises a crossbeam (1-1), a return-shaped frame (1-2) and a height-adjustable column (1-3); the crossbeam (1-1) is fixed in the middle of the return-shaped frame (1-2), and a diagonal brace (1-6) is provided on the outer side of the connection position between the crossbeam (1-1) and the return-shaped frame (1-2); the height-adjustable columns (1-3) are fixed at the four corners of the bottom of the return-shaped frame (1-2), and the wheels (1-4) with built-in brakes are installed at the lower ends of the height-adjustable columns (1-3).

3. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to claim 2 is characterized in that: The height-adjustable upright column (1-3) comprises a fixed column (1-31) and a movable column (1-32), both of which are hollow tubular structures, the fixed column (1-31) is fixed on the bottom surface of the end of the return frame (1-2), the upper end of the movable column (1-32) is inserted into the interior of the fixed column (1-31) through the lower port of the fixed column (1-31), and the movable column (1-32) is fixedly connected to the fixed column (1-31) by a bolt that passes through a through hole on the fixed column (1-31) and is threadedly connected to a corresponding position on the movable column (1-32).

4. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to claim 3 is characterized in that: Traction rings (1-5) used when the load-bearing combined steel frame (1) is displaced are fixed to the outer walls at both ends of the front and rear side walls of the return frame (1-2).

5. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to claim 4 is characterized in that: A winch lifting device (4) located outside the return frame (1-2) is fixed on the bottom surfaces of both the front and rear ends of the crossbeam (1-1).

6. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to claim 1 is characterized in that: The hanging frame (2) adopts a U-shaped frame structure welded by two front and rear vertical poles (2-1) and a bottom beam (2-2) arranged between the two vertical poles (2-1) and fixedly connected to the lower ends of the vertical poles (2-1); the upper ends of the two vertical poles (2-1) are located in a return frame (1-2) in the load-bearing composite steel frame (1) and are fixedly connected to the bottom surface of the cross beam (1-1) of the load-bearing composite steel frame (1); and a ladder (2-3) is fixedly connected to the inner side wall of one of the vertical poles (2-1) at its upper and lower ends to the cross beam (1-1) and the operating platform (3) respectively.

7. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to any one of claims 1 to 6, characterized in that: The operating platform (3) comprises an outer frame (3-1) and a railing (3-4); the outer frame (3-1) is centrally fixed on a bottom beam (2-2) of a hanging frame (2); a platform plate (3-2) is fixedly connected to the bottom of the outer frame (3-1); the front and rear sides of the outer frame (3-1) are provided with diagonal braces (3-3) located on both outer sides of a vertical pole (2-1) in the hanging frame (2) and fixedly connected to the side walls corresponding to the vertical pole (2-1); and the outer frame (3-1) is surrounded by railings (3-4) fixedly connected to the platform columns thereon.

8. The movable auxiliary device for welding and hoisting of double-width parallel steel box girders according to claim 7 is characterized in that: The platform plate (3-2) is a perforated mesh plate or an aluminum mesh.

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