Movable mounting and welding platform for cantilever end of steel box girder

Abstract

The movable mounting and welding platform for the cantilever end of the steel box girder comprises a movable frame arranged on a platform at the cantilever end of the steel box girder, the movable frame is fixedly connected with the corresponding side of a hanging support arranged on the outer side of the cantilever end of the steel box girder, and a lifting device used for lifting materials is arranged on the hanging support. An operation platform for an operator to stand for construction is arranged below the cantilever end of the steel box girder, the outer side of the operation platform is fixedly connected with the lower end of the hanging support, a ladder stand corresponding to the position of an operation opening which is formed in the movable frame and allows the operator to pass through is fixed to the operation platform, and the upper end of the ladder stand is fixedly connected with the movable frame. The utility model solves the problems that the welding of the steel box girder cantilever inlaying section or the installation operation of the decorative plate is difficult and the precision is difficult to guarantee, has the advantages of simple structure, simplicity and convenience in manufacture, convenience in use and movement, reduction of the construction difficulty, improvement of the construction precision, guarantee of the safety of constructors, improvement of the construction efficiency and speed, saving of the cost, convenience in movement and high practicability. And repeated utilization can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel structures, and in particular relates to a movable installation welding platform for a cantilever end of a steel box beam. Background Art

[0002] Compared with other bridges such as concrete, steel structure bridges have many advantages. Steel structure bridges have excellent earthquake resistance, higher safety factor, high construction efficiency, can be recycled and reused, energy-saving and environmentally friendly. The development prospects of steel structure bridges are very good.

[0003] As a bridge structure that is convenient and quick to construct, steel box girders are increasingly used in the construction of urban pedestrian overpasses, viaducts, highways, and railway bridges. 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 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 panel, which must have a shape, but the decorative panel can only be installed after the main body of the steel box girder is built. The decorative panel is usually heavy. Since the bottom of the cantilever is suspended, it is difficult to install the entire decorative panel by manpower alone, and the accuracy is difficult to guarantee.

[0004] At present, the welding of the patching section of the cantilever segment and the installation of the decorative panel generally adopt the setting up of a wrist buckle bracket, the setting up of a working platform on the wrist buckle bracket, and then the welding construction is carried out in conjunction with a crane. The disadvantages of using this method are that the amount of materials used is large and a certain site is required; the second is that the workload is large, the installation and disassembly is inconvenient and the cost is high; in areas with flat terrain, a lifting trolley (climbing vehicle) can also be used in conjunction with a crane for installation. When using a climbing vehicle for operation, the steel decorative panel is heavy and requires the joint efforts of two people, and the installation accuracy is high. During the operation, the climbing vehicle is prone to shaking due to the large extension height and the heavy mass of the people carried. The working space is small, which is very inconvenient, the construction speed is slow, and the efficiency is low; if the terrain is complex or across the river, the construction of the above method is limited; therefore, in order to solve the shortcomings and deficiencies of the existing technology, it is necessary to make improvements. Utility Model Content

[0005] The technical problem solved by the utility model is as follows: a movable installation welding platform for the cantilever end of a steel box girder is provided, wherein a movable frame arranged on the cantilever end platform of the steel box girder is connected to a working platform arranged below the cantilever end of the steel box girder through a hanging bracket, and an operator is provided with a ladder arranged on the working platform and corresponding to an operating port reserved on the movable frame for going up and down for operation, thereby solving the problem that welding of the cantilever patching section of the steel box girder or installation of decorative panels is difficult and the accuracy is difficult to ensure. The entire structure is prefabricated and welded in a factory, and when welding the cantilever patching section of the steel box girder or installing the decorative panels, the entire movable platform can be directly hoisted to a designated position by a crane and then can be used. The utility model has a simple structure, is easy to manufacture, is easy to use and move, reduces the difficulty of construction, improves the construction accuracy, ensures the safety of construction personnel, improves construction efficiency and speed, saves costs, is easy to move, and can be reused.

[0006] The technical solution adopted by the utility model is as follows: a movable welding platform is installed at the cantilever end of a steel box girder, comprising a movable frame arranged on the platform at the cantilever end of the steel box girder, the movable frame is fixedly connected to the corresponding side of a hanging bracket arranged on the outer side of the cantilever end of the steel box girder, and the hanging bracket is provided with a lifting device for lifting materials, a working platform for workers to stand and work is provided below the cantilever end of the steel box girder, and the outer side of the working platform is fixedly connected to the lower end of the hanging bracket, a ladder corresponding to the position of an operating port arranged on the movable frame for operators to pass through is fixed on the working platform, and the upper end of the ladder is fixedly connected to the movable frame.

[0007] The mobile frame includes a welded frame and travel wheels fixed to the bottom of the frame and having a braking function. The operating port is arranged on the frame and on the same side as the outer edge of the cantilever end of the steel box beam.

[0008] Furthermore, a pull ring is fixed at the middle of the front and rear side walls of the frame to facilitate pulling the movable frame.

[0009] Furthermore, the hanging bracket includes two pillars that are parallel to each other and vertically arranged, a cantilever fixed on the outer wall of the upper end of the pillar and arranged at the same height as the mobile frame, the two ends of the outer side of the mobile frame are respectively fixedly connected to the inner wall of the pillar at the corresponding position, and the cross bar fixed between the upper ends of the two pillars is fixedly connected to the outer side of the mobile frame through a diagonal brace, reinforcing rods fixedly connected to the corresponding side pillars and the side walls of the mobile frame are fixed on three sides of the root of the cantilever, and a diagonal brace fixedly connected to the mobile frame is fixed on the upper end of the side wall of the pillar facing the mobile frame, and the lifting device is installed on the cantilever.

[0010] Furthermore, the upper end of the support column is higher than the moving frame, and the upper end of the ladder side frame located between the two columns passes through the outer frame rod of the moving frame and is fixedly connected to the cross bar.

[0011] Furthermore, the lifting device includes a hoisting bracket and a hoisting machine fixed on the hoisting bracket.

[0012] Furthermore, the working platform includes a platform bottom frame, a railing fixed around the platform bottom frame, and a platform plate fixed to the upper end surface of the platform bottom frame and located on the inner side of the railing. The lower ends of the two pillars in the hanging bracket are fixedly connected to the outer corner positions of the platform bottom frame. Vertical columns are fixed to the two corner positions on the opposite side of the platform bottom frame and the pillars, and the pillars and the vertical columns are fixedly connected to the corresponding side railing ends. The lower ends of the ladder side frames are fixedly connected to the side walls of the platform bottom frame, and the multiple ladders on the ladder side frames are fixedly connected to the corresponding side pillars.

[0013] Furthermore, the platform plate is made of punched steel plate or galvanized corrugated springboard.

[0014] Furthermore, pull rods fixedly connected to corresponding side pillars are provided on both sides of the platform bottom frame.

[0015] Furthermore, a counterweight is mounted on the movable frame.

[0016] The advantages of this utility model compared with the prior art:

[0017] 1. This technical solution provides conditions for the movement of the working platform connected to the hanging bracket by arranging a mobile frame connected to the hanging bracket on the cantilever end platform of the steel box beam, and provides conditions for the operator to go up and down through a ladder arranged on the working platform and corresponding to the operation port reserved on the mobile frame;

[0018] 2. The entire platform of this technical solution can be suspended on the cantilever arm of the steel box girder and can be freely moved along the length direction of the bridge for construction work, which greatly simplifies the construction difficulty of the cantilever end of the steel box girder;

[0019] 3. This technical solution has a simple structure, is easy to make, easy to use and move, reduces the difficulty of construction, improves the construction accuracy, and solves the problem that the welding of the cantilever embedded section of the steel box beam or the installation of the decorative plate is difficult and the accuracy is difficult to ensure. It not only ensures the safety of the construction workers, improves the construction efficiency and speed, but also saves costs, is easy to move, and can be reused;

[0020] 4. The entire structure of this technical solution is prefabricated and welded in the factory. When welding the cantilever patching section of the steel box beam or installing the decorative panel, the entire mobile platform can be directly hoisted to the designated location by a crane and then used, saving man-hours and improving efficiency;

[0021] 5. The entire structure of this technical solution is made of ordinary steel, with very low production and installation costs. The steel itself is recyclable, which saves costs, is energy-efficient and environmentally friendly, and is in line with the development concept of cost reduction, efficiency improvement, and green energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the use state of the utility model after being installed on the cantilever end of the steel box beam;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the connection structure between the mobile frame and the hanging bracket of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the mobile rack of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiment of the present utility model Figure 1-4 , 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.

[0027] 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.

[0028] 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.

[0029] The cantilever end of the steel box girder is equipped with a movable welding platform, such as Figure 1-2As shown, it includes a mobile frame 1 arranged on the platform of the cantilever end 7 of the steel box beam, the mobile frame 1 is fixedly connected to the corresponding side of the hanging bracket 2 arranged on the outside of the cantilever end 7 of the steel box beam, and the hanging bracket 2 is provided with a lifting device for lifting materials, and a working platform 3 for workers to stand and work is provided below the cantilever end 7 of the steel box beam, and the outer side of the working platform 3 is fixedly connected to the lower end of the hanging bracket 2, and a ladder 4 corresponding to the position of the operating port 1-1 arranged on the mobile frame 1 and for operators to pass through is fixed on the working platform 3, and the upper end of the ladder 4 is fixedly connected to the mobile frame 1, wherein the mobile frame 1 is equipped with a counterweight block 8, and the counterweight block 8 is selected from suitable concrete blocks, sandbags, steel components, etc. after calculation to ensure safety and stability during operation; in the above structure, by A mobile frame 1 connected to the hanging bracket 2 is arranged on the platform at the cantilever end 7, which provides conditions for the movement of the working platform 3 connected to the hanging bracket 2, and a ladder 4 arranged on the working platform 3 and corresponding to the operation port 1-1 reserved on the mobile frame 1 is provided for operators to go up and down; the entire platform can be suspended on the cantilever arm of the steel box girder and can be freely moved along the length direction of the bridge for construction work, which greatly simplifies the construction difficulty of the cantilever end of the steel box girder; the structure is simple, the manufacture is simple, the use and movement are convenient, the construction difficulty is reduced, the construction accuracy is improved, and the problem of difficult operation and difficult accuracy of welding or decorative plate installation of the cantilever embedded section of the steel box girder is solved, which not only ensures the safety of the construction workers, improves the construction efficiency and speed, but also saves costs, is easy to move, and can be reused;

[0030] like Figure 4 As shown, the specific structure of the mobile frame 1 is as follows: the mobile frame 1 includes a welded frame 1-2 and a walking wheel 1-3 fixed to the bottom surface of the frame 1-2 and having a braking function, which facilitates the movement of the mobile frame 1 while preventing slippage during construction to ensure the safety of construction workers. The operation port 1-1 is arranged on the frame 1-2 and is arranged on the same side as the outer edge of the cantilever end 7 of the steel box beam. In cooperation with the ladder 4, the safety of the workers when going up and down can be guaranteed, and protection can be provided to prevent people from falling when people go down the ladder; specifically, a pull ring 1-4 is fixed in the middle of the front and rear side walls of the frame 1-2 for facilitating the pulling of the mobile frame 1. The pull ring 1-4 can be used to manually or connect electric equipment to pull the entire suspended platform to move.

[0031] like Figure 2-3As shown, the specific structure of the hanging bracket 2 is as follows: the hanging bracket 2 includes two pillars 2-1 parallel to each other and vertically arranged, a cantilever 2-2 fixed on the outer side wall of the upper end of the pillar 2-1 and arranged at the same height as the mobile frame 1, the two ends of the outer side of the mobile frame 1 are respectively fixedly connected to the inner wall of the pillar 2-1 at the corresponding position, and the cross bar 2-3 fixed between the upper ends of the two pillars 2-1 is fixedly connected to the outer side of the mobile frame 1 through the diagonal brace 2-4, and the three sides of the root of the cantilever 2-2 are fixed with reinforcing rods 2-5 fixedly connected to the corresponding side pillars 2-1 and the side walls of the mobile frame 1 to ensure the stability of the structure, and the upper end of the side wall of the pillar 2-1 facing the side of the mobile frame 1 is fixed with a diagonal brace 2-4 fixedly connected to the mobile frame 1, and the lifting device is installed on the cantilever 2-2; specifically, the upper end of the pillar 2-1 is about 11.2m higher than the mobile frame, and the upper end of the side frame of the ladder 4 located between the two pillars 2-1 passes through the outer frame rod of the mobile frame 1 and is fixedly connected to the cross bar 2-3.

[0032] like Figure 3 As shown, the specific structure of the lifting device is as follows: the lifting device includes a hoisting bracket 5 and a hoisting machine 6 fixed on the hoisting bracket 5.

[0033] like Figure 2 As shown, the specific structure of the working platform 3 is as follows: the working platform 3 includes a platform bottom frame 3-1, a railing 3-2 fixed around the platform bottom frame 3-1, and a platform plate 3-3 fixed to the upper end surface of the platform bottom frame 3-1 and located on the inner side of the railing 3-2. The railing 3-2 is made on-site with round steel. In order to prevent objects from falling from high altitudes, a layer of mesh plate is arranged outside the railing 3-2. The lower ends of the two pillars 2-1 in the hanging bracket 2 are fixedly connected to the outer corner positions of the platform bottom frame 3-1. The two corner positions on the opposite sides of the platform bottom frame 3-1 and the pillars 2-1 are fixed with columns 3-4, and the pillars 2-1 and the columns 3-4 are fixedly connected to the ends of the corresponding side railings 3-2. The lower end of the side frame of the ladder 4 is fixedly connected to the side wall of the platform bottom frame 3-1, and the multiple ladders on the side frame of the ladder 4 are fixedly connected to the corresponding side pillars 2-1, wherein the ladders are made of round steel or threaded steel bars, and the entire width is 600mm, which is convenient for workers to go up and down; specifically, the platform board 3-3 is made of punched steel plates or galvanized corrugated springboards, and the surface punching or corrugated plates can play an anti-slip role, while preventing water from accumulating on the platform when it rains and reducing the dead weight of the board surface; specifically, pull rods 3-5 fixedly connected to the corresponding side pillars 2-1 are provided on both sides of the platform bottom frame 3-1 to improve the structural stability, wherein some work tools can be temporarily placed on the working platform 3.

[0034] The entire structure of this technical solution is prefabricated and welded in the factory. When welding the cantilever patching section of the steel box beam or installing the decorative panel, the entire mobile platform can be directly hoisted to the designated position by a crane and then it can be used, saving man-hours and improving efficiency. The entire structure of this technical solution is made of ordinary steel, and the manufacturing and installation cost is very low. The steel itself can be recycled, saving costs, energy saving and environmental protection, and in line with the development concept of cost reduction, efficiency improvement, and green energy saving.

[0035] This solution has many uses. It can be used for welding of steel box girder cantilever patching sections, installation of decorative panels, on-site touch-up and other post-painting operations. It can also be used for downpipe installation and local maintenance, which speeds up the construction progress and saves construction time.

[0036] 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.

[0037] 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. The cantilever end of the steel box beam is equipped with a movable welding platform, which is characterized by: The invention comprises a mobile frame (1) arranged on a platform at a cantilever end (7) of a steel box girder, the mobile frame (1) being fixedly connected to a corresponding side of a hanging bracket (2) arranged outside the cantilever end (7) of the steel box girder, and a lifting device for lifting materials is provided on the hanging bracket (2), a working platform (3) for workers to stand and work is provided below the cantilever end (7) of the steel box girder, and the outer side of the working platform (3) is fixedly connected to the lower end of the hanging bracket (2), a ladder (4) corresponding to the position of an operating opening (1-1) arranged on the mobile frame (1) and for operators to pass through is fixed on the working platform (3), and the upper end of the ladder (4) is fixedly connected to the mobile frame (1).

2. The movable welding platform for cantilever end of steel box beam according to claim 1 is characterized in that: The mobile frame (1) comprises a welded frame (1-2) and a running wheel (1-3) fixed to the bottom surface of the frame (1-2) and having a braking function. The operating port (1-1) is arranged on the frame (1-2) and is arranged on the same side as the outer edge of the cantilever end (7) of the steel box beam.

3. The movable welding platform for cantilever end of steel box beam according to claim 2 is characterized in that: A pull ring (1-4) for facilitating pulling of the movable frame (1) is fixed in the middle of the front and rear side walls of the frame (1-2).

4. The movable welding platform for cantilever end of steel box beam according to claim 1 is characterized in that: The hanging bracket (2) comprises two pillars (2-1) which are parallel to each other and vertically arranged, and a cantilever (2-2) fixed on the outer side wall of the upper end of the pillar (2-1) and arranged at the same height as the mobile frame (1); the two ends of the outer side of the mobile frame (1) are respectively fixedly connected to the inner wall of the pillar (2-1) at the corresponding position, and the cross bar (2-3) fixed between the upper ends of the two pillars (2-1) is fixedly connected to the outer side of the mobile frame (1) through a diagonal brace (2-4); reinforcing rods (2-5) fixedly connected to the corresponding side pillars (2-1) and the side walls of the mobile frame (1) are fixed on three sides of the root of the cantilever (2-2); the upper end of the side wall of the pillar (2-1) facing the mobile frame (1) is fixed with a diagonal brace (2-4) fixedly connected to the mobile frame (1); and the lifting device is installed on the cantilever (2-2).

5. The movable welding platform for cantilever end of steel box beam according to claim 4 is characterized in that: The upper end of the support (2-1) is higher than the moving frame (1), and the upper end of the side frame of the ladder (4) located between the two support pillars (2-1) passes through the outer frame rod of the moving frame (1) and is fixedly connected to the crossbar (2-3).

6. The movable welding platform for cantilever end of steel box beam according to claim 1 is characterized in that: The lifting device comprises a hoisting bracket (5) and a hoisting machine (6) fixed on the hoisting bracket (5).

7. The movable welding platform for cantilever end of steel box beam according to claim 1 is characterized in that: The working platform (3) comprises a platform bottom frame (3-1), a handrail (3-2) fixed around the platform bottom frame (3-1), and a platform plate (3-3) fixed to the upper end surface of the platform bottom frame (3-1) and located inside the handrail (3-2); the lower ends of the two pillars (2-1) in the hanging bracket (2) are fixedly connected to the outer corner positions of the platform bottom frame (3-1); two corner positions on the opposite sides of the platform bottom frame (3-1) and the pillars (2-1) are both fixed with upright posts (3-4); the pillars (2-1) and the upright posts (3-4) are fixedly connected to the ends of the corresponding side handrails (3-2); the lower ends of the side frames of the ladder (4) are fixedly connected to the side walls of the platform bottom frame (3-1), and a plurality of ladders on the side frames of the ladder (4) are fixedly connected to the corresponding side pillars (2-1).

8. The movable welding platform for cantilever end of steel box beam according to claim 7 is characterized in that: The platform plate (3-3) is made of a punched steel plate or a galvanized corrugated springboard.

9. The movable welding platform for cantilever end of steel box beam according to claim 8, characterized in that: Pull rods (3-5) fixedly connected to corresponding side pillars (2-1) are provided on both sides of the platform bottom frame (3-1).

10. The movable welding platform for cantilever end of steel box beam according to any one of claims 1 to 9, characterized in that: A counterweight (8) is mounted on the movable frame (1).

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