Steel box girder welding structure

Abstract

The utility model discloses a steel box girder welding structure which comprises a bottom plate, a height adjusting mechanism used for adjusting the operation height is arranged above the bottom plate, and a drilling and milling mechanism used for beveling a gap, needing to be welded, of a steel box girder is arranged above the bottom plate. A moving mechanism for moving the drilling and milling mechanism is arranged at the top of the bottom plate; according to the utility model, the height adjusting mechanism is arranged for adjusting and coping with steel box girders with different thicknesses so as to adjust the sizes of the grooves. The drilling and milling mechanism is arranged to be used for beveling a gap, needing to be welded, of the steel box girder, so that the bearable strength of a welding point is higher. And the moving mechanism is arranged to provide power for the drilling and milling mechanism, so that gaps, needing to be welded, of the steel box girder can be beveled automatically. The cooling mechanism is arranged for cooling when the steel box girder is beveled, so that the hardness of the milling cutter cannot be changed due to high temperature, and the milling cutter is prevented from being damaged. And by arranging the supporting mechanism, the equipment can be conveniently supported, and the equipment can be transferred.

Description

Technical Field

[0001] This utility model relates to the field of box girder welding technology, specifically a steel box girder welding structure. Background Technology

[0002] Welded steel box girder structures are load-bearing components formed by connecting multiple steel plates (including top plate, bottom plate, web plate, etc.) into a closed box-shaped cross-section through welding. They are mainly used in long-span bridges, high-speed railways, and other projects. Their core characteristic is the use of a fully welded method to form a rigid box structure, resulting in high strength, lightweight construction, and excellent torsional resistance.

[0003] Existing steel box girder welding methods involve directly welding the gaps between a group of steel box girders, either manually or using equipment. This can lead to incomplete penetration of the weld, failing to achieve the desired effect of single-sided welding with double-sided forming. Furthermore, internal problems such as slag inclusions and porosity may go undetected, resulting in substandard welds. Therefore, we need to propose a new steel box girder welding structure. Utility Model Content

[0004] The purpose of this utility model is to provide a welded steel box girder structure that has the advantage of pre-beveling the weld joints to make them more robust, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a welded steel box girder structure, including a base plate, a height adjustment mechanism for adjusting the working height is provided above the base plate, a drilling and milling mechanism for beveling the gaps to be welded in the steel box girder is provided above the base plate, a moving mechanism for moving the drilling and milling mechanism is provided on the top of the base plate, a cooling mechanism for cooling the drilling and milling mechanism during drilling and milling operations is provided above the drilling and milling mechanism, and a support mechanism for supporting the equipment to facilitate forklift movement is provided on one side of the height adjustment mechanism.

[0006] Preferably, the adjustment mechanism includes a mounting block disposed above the base plate, a first slide rail disposed on one side of the mounting block, a first slider slidably mounted on the surface of the first slide rail, and a stop block disposed on the top of the mounting block.

[0007] Preferably, the moving mechanism includes a placement plate disposed above the base plate. One side of the placement plate is connected to the surface of the first slider. A second slide rail is located at the top of the placement plate. A second slider is slidably mounted on the surface of the second slide rail. A first through groove is formed on the surface of the placement plate and extends through the placement plate. A second through groove is formed on the surface of the base plate and extends through the base plate.

[0008] Preferably, the drilling and milling mechanism includes a mounting plate, which is disposed above the base plate. The bottom of the mounting plate is connected to the top of the second slider. A placement hole is formed on the surface of the mounting plate and extends through the mounting plate. A bearing is provided on the inner wall of the placement hole. A connecting rod is provided on the inner wall of the bearing. A tapered milling cutter is installed at the bottom of the connecting rod, and a power mechanism is provided at the top of the connecting rod.

[0009] Preferably, the power mechanism includes a first belt reel, which is disposed on the top of the connecting rod. A second belt reel is disposed on one side of the first belt reel. A belt is fitted onto the surfaces of the first belt reel and the second belt reel. A motor is disposed on the top of the second belt reel and connected to the output end of the motor. A protective shell is disposed on the top of the mounting plate. The top of the motor is connected to the top of the protective shell.

[0010] Preferably, the cooling mechanism includes a water tank, which is disposed on the top of the mounting plate. A water pump is disposed inside the water tank. A metal universal tube is disposed at the output end of the water pump and passes through the water tank. A nozzle is disposed at the end of the metal universal tube away from the water pump. A water filling hole is disposed at the top of the water tank.

[0011] Preferably, the support mechanism includes a connecting block, which is disposed on one side of the mounting block. An electric cylinder is disposed on the side of the connecting block away from the mounting block, and a support plate is disposed at the output end of the electric cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model incorporates a height adjustment mechanism to adjust the bevel size for steel box girders of varying thicknesses. A milling and drilling mechanism is used to bevel the weld joints of the steel box girder, increasing the strength of the weld points. A moving mechanism provides power to the milling and drilling mechanism, enabling automatic beveling of the weld joints. A cooling mechanism lowers the temperature during beveling to prevent the milling cutter from changing its hardness due to high temperatures, thus preventing damage. A support mechanism facilitates the lifting and transport of the equipment.

[0014] 2. Compared to existing technologies that involve direct welding of the gaps between a set of steel box girders using manual labor or equipment, which can lead to incomplete penetration, this invention pre-beveling the gaps in the steel box girders to be welded results in more uniform weld points and facilitates single-sided welding with double-sided forming. The beveled surface can be welded layer by layer, allowing for better observation and timely handling of issues such as slag inclusions and porosity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a welded steel box girder structure according to the present invention;

[0016] Figure 2 This is a sectional view of a steel box girder welded structure connecting rod according to the present invention;

[0017] Figure 3 This is a cross-sectional view of a steel box girder welded structure placement plate according to the present invention;

[0018] Figure 4 This is a cross-sectional view of a steel box girder welded structure installation block according to the present invention.

[0019] In the diagram: 1. Base plate; 2. Mounting block; 3. First slide rail; 4. First slider; 5. Stop block; 6. Placement plate; 7. Second slide rail; 8. Second slider; 9. First through groove; 10. Second through groove; 11. Mounting plate; 12. Placement hole; 13. Bearing; 14. Connecting rod; 15. Tapered milling cutter; 16. First belt reel; 17. Second belt reel; 18. Belt; 19. Motor; 20. Protective shell; 21. Water tank; 22. Water pump; 23. Metal universal joint; 24. Nozzle; 25. Water inlet hole; 26. Connecting block; 27. Electric cylinder; 28. Support plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 This utility model provides a technical solution: a welded steel box girder structure, including a base plate 1, with a height adjustment mechanism for adjusting the working height above the base plate 1; the adjustment mechanism includes a mounting block 2, which is positioned above the base plate 1, a first slide rail 3 is provided on one side of the mounting block 2, a first slider 4 is slidably mounted on the surface of the first slide rail 3, and a stop block 5 is provided on the top of the mounting block 2. When encountering steel box girders of different thicknesses, it is necessary to adjust the depth and width of the bevel. The height of the first slider 4 can be adjusted on the first slide rail 3, thereby changing the height of the mounting plate 11. This allows the height of the tapered milling cutter 15 to be varied to accommodate beveling of steel box girders of various thicknesses. The first slider 4 and the first slide rail 3 can be used as electric slide rails.

[0022] A milling and drilling mechanism for beveling the gaps that need to be welded on the steel box girder is provided above the base plate 1. The milling and drilling mechanism includes a mounting plate 11, which is located above the base plate 1. The bottom of the mounting plate 11 is connected to the top of the second slider 8. A placement hole 12 is provided on the surface of the mounting plate 11 and extends through the mounting plate 11. A bearing 13 is provided on the inner wall of the placement hole 12. A connecting rod 14 is provided on the inner wall of the bearing 13. A tapered milling cutter 15 is installed at the bottom of the connecting rod 14. A power mechanism is provided at the top of the connecting rod 14.

[0023] The power mechanism includes a first pulley 16, which is positioned on top of the connecting rod 14. A second pulley 17 is located on one side of the first pulley 16. A belt 18 is fitted onto the surfaces of both the first and second pulleys 16. A motor 19 is mounted on top of the second pulley 17 and connected to its output end. A protective shell 20 is mounted on top of the mounting plate 11, and the top of the motor 19 is connected to the top of the protective shell 20. When beveling is required for welding seams on the steel box girder, the motor 19 is started. The output end of the motor 19 rotates, causing the second pulley 17 to rotate. This rotation, via the belt 18, causes the first pulley 16 to rotate, which in turn rotates the connecting rod 14, thereby rotating the tapered milling cutter 15.

[0024] The top of the base plate 1 is provided with a moving mechanism for moving the drilling and milling mechanism. The moving mechanism includes a placement plate 6, which is positioned above the base plate 1. One side of the placement plate 6 is connected to the surface of the first slider 4. A second slide rail 7 is located at the top of the placement plate 6. A second slider 8 is slidably mounted on the surface of the second slide rail 7. A first through groove 9 is formed on the surface of the placement plate 6 and extends through it. A second through groove 10 is formed on the surface of the base plate 1 and extends through it. By changing the position of the second slider 8 on the second slide rail 7, the mounting plate 11 is moved, thereby moving the tapered milling cutter 15 to automatically bevele the gaps that need to be welded on the steel box girder.

[0025] A cooling mechanism is installed above the drilling and milling mechanism to reduce its temperature during drilling and milling operations. The cooling mechanism includes a water tank 21, which is located on top of the mounting plate 11. A water pump 22 is installed inside the water tank 21. A metal universal joint 23 is installed at the output end of the water pump 22 and passes through the water tank 21. A nozzle 24 is installed at the end of the metal universal joint 23 away from the water pump 22. A water inlet 25 is located at the top of the water tank 21. Water is pumped in through the input end of the water pump 22, reaches the metal universal joint 23 at the output end, and is sprayed out by the nozzle 24 to cool the tapered end mill 15, preventing the end mill from changing its hardness due to high temperatures and thus preventing damage. This extends the service life of the tapered end mill 15.

[0026] A support mechanism is provided on one side of the height adjustment mechanism to support the equipment for easy movement by forklifts. The support mechanism includes a connecting block 26, which is located on one side of the mounting block 2. An electric cylinder 27 is located on the side of the connecting block 26 away from the mounting block 2, and a support plate 28 is provided at the output end of the electric cylinder 27. When the equipment needs to be moved, the output end of the electric cylinder 27 extends and drives the support plate 28 to move downward, thereby supporting the equipment and facilitating its movement by forklifts or other handling equipment.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welded steel box girder structure, comprising a base plate (1), characterized in that: A height adjustment mechanism for adjusting the working height is provided above the base plate (1). A drilling and milling mechanism for beveling the gaps that need to be welded on the steel box girder is provided above the base plate (1). A moving mechanism for providing movement to the drilling and milling mechanism is provided on the top of the base plate (1). A cooling mechanism for cooling the drilling and milling mechanism during drilling and milling operations is provided above the drilling and milling mechanism. A support mechanism for supporting the equipment to facilitate forklift movement is provided on one side of the height adjustment mechanism.

2. The welded steel box girder structure according to claim 1, characterized in that: The adjustment mechanism includes a mounting block (2), which is located above the base plate (1). A first slide rail (3) is provided on one side of the mounting block (2), and a first slider (4) is slidably mounted on the surface of the first slide rail (3). A stop block (5) is provided on the top of the mounting block (2).

3. The welded steel box girder structure according to claim 2, characterized in that: The moving mechanism includes a placement plate (6) which is disposed above the base plate (1). One side of the placement plate (6) is connected to the surface of the first slider (4). A second slide rail (7) is located at the top of the placement plate (6). A second slider (8) is slidably mounted on the surface of the second slide rail (7). A first through groove (9) is provided on the surface of the placement plate (6) and penetrates the placement plate (6). A second through groove (10) is provided on the surface of the base plate (1) and penetrates the base plate (1).

4. The welded steel box girder structure according to claim 3, characterized in that: The drilling and milling mechanism includes a mounting plate (11), which is located above the base plate (1). The bottom of the mounting plate (11) is connected to the top of the second slider (8). The surface of the mounting plate (11) is provided with a placement hole (12) that penetrates the mounting plate (11). The inner wall of the placement hole (12) is provided with a bearing (13). The inner wall of the bearing (13) is provided with a connecting rod (14). The bottom of the connecting rod (14) is equipped with a tapered milling cutter (15), and the top of the connecting rod (14) is provided with a power mechanism.

5. A welded steel box girder structure according to claim 4, characterized in that: The power mechanism includes a first belt reel (16), which is located on the top of the connecting rod (14). A second belt reel (17) is located on one side of the first belt reel (16). A belt (18) is fitted on the surface of the first belt reel (16) and the second belt reel (17). A motor (19) is located on the top of the second belt reel (17) and connected to the output end of the motor (19). A protective shell (20) is located on the top of the mounting plate (11). The top of the motor (19) is connected to the top of the protective shell (20).

6. A welded steel box girder structure according to claim 4, characterized in that: The cooling mechanism includes a water tank (21), which is located on the top of the mounting plate (11). A water pump (22) is installed inside the water tank (21). A metal universal tube (23) is installed at the output end of the water pump (22) and passes through the water tank (21). A nozzle (24) is installed at the end of the metal universal tube (23) away from the water pump (22). A water filling hole (25) is installed on the top of the water tank (21).

7. A welded steel box girder structure according to claim 6, characterized in that: The support mechanism includes a connecting block (26), which is disposed on one side of the mounting block (2). An electric cylinder (27) is disposed on the side of the connecting block (26) away from the mounting block (2). A support plate (28) is disposed at the output end of the electric cylinder (27).

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