Steel structure bridge capable of being spliced and welded

Abstract

The utility model provides a steel structure bridge capable of being assembled and welded, which comprises two groups of steel structure columns, connecting cross arms, a welding support structure, a connecting structure and a lifting structure, the lower ends of the two groups of steel structure columns are respectively and fixedly connected with a base, and the connecting cross arms are arranged on the opposite sides of the two groups of steel structure columns. Two welding supporting structures are arranged on the lower surface of the connecting cross arm, a connecting structure is arranged on the outer surface of the upper end of one steel structure column, a mounting platform is arranged above the connecting structure, and a lifting structure is arranged on the upper surface of the mounting platform. By arranging the welding supporting structure, after the connecting cross arm is hoisted to the upper surface of the supporting plate, the connecting cross arm and the steel structure column are more stable due to the fact that a triangle is formed among the inclined supporting rod, the steel structure column and the connecting cross arm, and the connecting cross arm is fixed at the connecting position of the welding supporting plate and the connecting cross arm. And the connecting cross arm can be separated from the towing hook after being stably placed, so that the assembly working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure installation, in particular to a steel structure bridge that can be assembled and welded. Background Art

[0002] Assembled and welded steel structure bridges are a modern bridge construction technology that prefabricates most of the bridge structure components in the factory and then assembles and welds them on site to complete the construction of the bridge. This technology can significantly shorten the construction period, reduce the impact of on-site construction on traffic and the environment, and improve the quality and safety of the project. Therefore, it is widely used in modern bridge projects. Assembled and welded steel structure bridges are suitable for various bridge types, including crossing rivers, railways, highways and other scenarios. Especially in areas with heavy urban traffic, this technology can reduce traffic impact, shorten the construction period and reduce construction costs;

[0003] Although most of the steel structure work is completed in the factory, the final assembly and welding of the bridge still need to be carried out on site. A large crane is needed on site to lift the main columns. After the steel columns of the bridge are installed, the space between the steel columns is limited, which reduces the operating space of the crane. When lifting the connecting cross arms between the steel columns, the connecting cross arms lifted by the large crane are prone to hit the steel columns. In the event of a collision, the steel columns may collapse, which poses a certain safety risk. At the same time, the connecting cross arms need to be kept lifted by the crane at all times during welding. It is necessary to wait until both ends of the connecting cross arms are fully welded before the connecting cross arms can be detached, which reduces the efficiency of assembly. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a steel structure bridge which can be assembled and welded.

[0005] The utility model provides an assembled and welded steel structure bridge comprising: steel columns, connecting cross arms, welded support structures, connecting structures and lifting structures, wherein two groups of steel columns are provided, the lower ends of the two groups of steel columns are respectively fixedly connected to bases, connecting cross arms are provided on opposite sides of the two groups of steel columns, two groups of welding support structures are provided on the lower surfaces of the connecting cross arms, the welding support structure comprises an oblique support rod, a first welded connecting plate and a support plate, a connecting structure is provided on the outer surface of the upper end of one group of steel columns, the connecting structure comprises a U-shaped threaded rod and a fixed plate, an installation platform is provided above the connection structure, a lifting structure is provided on the upper surface of the installation platform, and the lifting structure comprises a servo motor, a reduction gear box, a rotating rod and a steel cable rope.

[0006] Preferably, a group of second welding connecting plates are welded at both ends of the connecting cross arm, and the two groups of second welding plates are welded to the opposite sides of the two groups of steel columns away from the connecting cross arm. Two groups of lifting ears are fixedly connected to the upper surface of the connecting cross arm, and through holes are respectively opened on the side surfaces of the two groups of lifting ears.

[0007] Preferably, the side surface of the first welded connecting plate is welded to the side surface of the steel column, the first welded connecting plate is fixedly connected to a diagonal brace on the side away from the steel column, the diagonal brace is fixedly connected to a support plate on one end away from the first welded connecting plate, and the upper surface of the support plate is welded to the lower surface of the connecting cross arm.

[0008] Preferably, two groups of fixing clamps are fixedly connected to the upper surface of the mounting platform, a group of sliding wheels are rotatably connected inside the two groups of fixing clamps respectively, the lower surface of the mounting platform is attached to the upper surface of a group of steel columns, a fixing column is fixedly connected to the lower surface of the mounting platform, one side of the fixing column is attached to the outer surface of the steel column away from the connecting cross arm, a fixing plate is provided on the side of the fixing column away from the steel column, and four groups of through holes are opened on the side surface of the fixing plate.

[0009] Preferably, two groups of U-shaped threaded rods are provided, and the two groups of U-shaped threaded rods are respectively engaged with the outer surface of the steel column and the fixed column, and the two ends of the two groups of U-shaped threaded rods respectively pass through four groups of through holes on the side surface of the fixed plate, and the outer surfaces of both ends of each group of U-shaped threaded rods are respectively threadedly connected with nuts.

[0010] Preferably, the lower surface of the servo motor is fixedly connected to the upper surface of the mounting platform, the power output end of the servo motor is fixedly connected to an active bevel gear, one side of the active bevel gear is meshed with a driven bevel gear, one side of the driven bevel gear is provided with a reduction gear, the side surface of the driven bevel gear is fixedly connected to the power receiving end of the reduction gear, the lower surface of the reduction gear is fixedly connected to the upper surface of the mounting platform, the power output end of the reduction gear is fixedly connected to the outer surface of the rotating rod, a group of fixing rings are respectively provided at both ends of the rotating rod, the two ends of the rotating rod are rotatably connected to the inside of the fixing ring, and the two groups of fixing rings are fixedly connected to the upper surface of the mounting platform.

[0011] Preferably, a group of steel cables are fixedly connected at both ends of the rotating rod, and the two groups of steel cables are respectively wrapped around the two ends of the rotating rod. One side of the steel cables is attached to the outer surface of the sliding wheel, and the ends of the two groups of steel cables away from the rotating rod are respectively fixedly connected with traction hooks, and the two groups of traction hooks correspond to the two groups of lifting ears respectively.

[0012] Compared with the related art, the assembled and welded steel structure bridge provided by the utility model has the following beneficial effects:

[0013] 1. By providing a connection structure, an installation platform and a lifting structure, the two ends of the two groups of U-shaped threaded rods pass through the four groups of through holes on the side surface of the fixing plate, and the nuts are screwed into the two ends of the two groups of U-shaped threaded rods. The nuts are tightened to fix the fixing column on the outer surface of the steel structure column, so that the installation platform is fixed, and the two groups of traction hooks are hung on the two groups of lifting ear through holes respectively. The rotation of the power output end of the servo motor drives the active bevel gear to rotate, and the active bevel gear rotates to engage the driven bevel gear to rotate. When the driven bevel gear rotates, it drives the reduction box to rotate, so that the two ends of the rotating rod rotate at a uniform speed inside the fixing ring, driving the steel cable rope to be wound up, making it convenient to hoist the connecting cross arm to the upper surface of the pallet, reducing the use space required for hoisting, reducing the possibility of collision with the steel column, and effectively improving safety.

[0014] 2. By setting up a welded support structure, after the connecting cross arm is hoisted to the upper surface of the pallet, a triangle is formed between the diagonal support rod, the steel column and the connecting cross arm, which makes the connecting cross arm and the steel column more stable. The connection between the pallet and the connecting cross arm is welded to fix the connecting cross arm. After the connecting cross arm is firmly placed, it can be detached from the towing hook, which effectively improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a preferred embodiment of the assembled and welded steel structure bridge provided by the utility model;

[0016] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0017] Figure 3 It is a schematic diagram of the exploded structure of the steel column, the connection structure and the mounting platform of the utility model;

[0018] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0019] Numbers in the figure: 1. Steel column; 2. Base; 3. Connecting cross arm; 4. Welded support structure; 5. Connecting structure; 6. Mounting platform; 7. Lifting structure; 8. Second welded connecting plate; 9. Lifting ear; 10. First welded connecting plate; 11. Diagonal support rod; 12. Support plate; 13. Fixing clamp; 14. Sliding wheel; 15. Fixed column; 16. Fixed plate; 17. Nut; 18. Active bevel gear; 19. Driven bevel gear; 20. Reducer; 21. Rotating rod; 22. Fixed ring; 23. Steel cable; 24. Towing hook; 25. Servo motor; 26. U-shaped threaded rod. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of the assembled and welded steel structure bridge provided by the utility model; Figure 2 It is a structural schematic diagram of another viewing angle of the utility model; Figure 3 It is a schematic diagram of the exploded structure of the steel column, the connection structure and the mounting platform of the utility model; Figure 4 For the utility model Figure 2 The enlarged structural diagram at A in the middle includes: a steel column 1, a connecting cross arm 3, a welded support structure 4, a connecting structure 5 and a lifting structure 7. The steel column 1 is provided with two groups, and the lower ends of the two groups of steel columns 1 are respectively fixedly connected to the base 2. The two groups of steel columns 1 are provided with connecting cross arms 3 on opposite sides. Two groups of welded support structures 4 are provided on the lower surface of the connecting cross arms 3. The welded support structure 4 is used to increase the stability between the steel column 1 and the connecting cross arm 3. The welded support structure 4 includes a diagonal brace 11, a first welded connecting plate 10 and a supporting plate 12. The outer surface of the upper end of one group of steel columns 1 is provided with a connecting structure 5. The connecting structure 5 includes a U-shaped threaded rod and a fixing plate 16. An installation platform 6 is provided above the connecting structure 5. The connecting structure 5 facilitates the installation of the installation platform 6 on the upper surface of the steel column 1. The upper surface of the installation platform 6 is provided with a lifting structure 7. The installation platform 6 facilitates the installation of the lifting structure 7. The lifting structure 7 is used to lift the connecting cross arm 3. The lifting structure 7 includes a servo motor, a reduction box 20, a rotating rod 21 and a steel cable 23.

[0022] In the specific implementation process, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a group of second welded connecting plates 8 are welded at both ends of the connecting cross arm 3, and the two groups of second welded plates are welded to the opposite sides of the two groups of steel columns 1 away from the connecting cross arm 3. Two groups of lifting ears 9 are fixedly connected to the upper surface of the connecting cross arm 3, and the side surfaces of the two groups of lifting ears 9 are respectively provided with through holes, so that the lifting ears 9 are convenient for lifting the connecting cross arm 3.

[0023] Among them, the side surface of the first welded connecting plate 10 is welded to the side surface of the steel column 1, and the first welded connecting plate 10 is fixedly connected to a diagonal brace 11 on the side away from the steel column 1. The diagonal brace 11 is fixedly connected to a support plate 12 at one end away from the first welded connecting plate 10, and the upper surface of the support plate 12 is welded to the lower surface of the connecting cross arm 3. Since a triangle is formed between the diagonal brace 11, the steel column 1 and the connecting cross arm 3, the connection between the connecting cross arm 3 and the steel column 1 is made more stable.

[0024] Among them, two groups of fixing clamps 13 are fixedly connected to the upper surface of the installation platform 6, and a group of sliding wheels 14 are rotatably connected inside the two groups of fixing clamps 13 respectively. The lower surface of the installation platform 6 is attached to the upper surface of a group of steel columns 1. A fixing column 15 is fixedly connected to the lower surface of the installation platform 6. One side of the fixing column 15 is attached to the outer surface of the steel column 1 away from the connecting cross arm 3. A fixing plate 16 is provided on the side of the fixing column 15 away from the steel column 1. Four groups of through holes are opened on the side surface of the fixing plate 16. The fixing plate 16 and the fixing column 15 facilitate fixing the installation platform 6 on the upper surface of the steel column 1.

[0025] Among them, two groups of U-shaped threaded rods are provided, and the two groups of U-shaped threaded rods are respectively engaged with the outer surface of the steel column 1 and the fixed column 15, and the two ends of the two groups of U-shaped threaded rods pass through the four groups of through holes on the side surface of the fixed plate 16 respectively, and the outer surface of the two ends of each group of U-shaped threaded rods is threadedly connected with nuts 17. The two ends of the two groups of U-shaped threaded rods pass through the four groups of through holes on the side surface of the fixed plate 16 respectively, and the nuts 17 are screwed into the two ends of the two groups of U-shaped threaded rods. Tighten the nuts 17 to fix the fixed column 15 on the outer surface of the steel column 1, thereby fixing the mounting platform 6.

[0026] Among them, the lower surface of the servo motor is fixedly connected to the upper surface of the mounting platform 6, the servo motor power output end is fixedly connected to the active bevel gear 18, the active bevel gear 18 is meshed with a driven bevel gear 19 on one side, and a reduction box 20 is arranged on one side of the driven bevel gear 19. The side surface of the driven bevel gear 19 is fixedly connected to the power receiving end of the reduction box 20, the lower surface of the reduction box 20 is fixedly connected to the upper surface of the mounting platform 6, and the power output end of the reduction box 20 is fixedly connected to the outer surface of the rotating rod 21. The reduction box 20 increases the torque of the servo motor power output end, so that the rotating rod 21 can rotate slowly and evenly, and the rotating rod 2 A set of fixing rings 22 are respectively sleeved at both ends of the rotating rod 21, and both ends of the rotating rod 21 are rotatably connected inside the fixing rings 22. The two sets of fixing rings 22 are fixedly connected to the upper surface of the mounting platform 6. The servo motor is electrically connected to the external power supply, and the servo motor is started. The power output end of the servo motor rotates to drive the active bevel gear 18 to rotate, and the active bevel gear 18 rotates to engage the driven bevel gear 19 to rotate. When the driven bevel gear 19 rotates, it drives the reduction box 20 to rotate, so that the two ends of the rotating rod 21 rotate at a uniform speed inside the fixing ring 22, driving the steel cable 23 to be wound, so as to facilitate the hoisting of the connecting cross arm 3 to the upper surface of the support plate 12.

[0027] Among them, a group of steel cables 23 are fixedly connected at both ends of the rotating rod 21, and the two groups of steel cables 23 are respectively wrapped around the two ends of the rotating rod 21. When the rotating rod 21 rotates, the steel cables 23 can be driven to reel in. One side of the steel cables 23 is attached to the outer surface of the sliding wheel 14. The sliding wheel 14 facilitates the reeling of the steel cables 23 and reduces the resistance when the steel cables 23 are reeled in. The ends of the two groups of steel cables 23 away from the rotating rod 21 are fixedly connected with traction hooks 24, and the two groups of traction hooks 24 correspond to the two groups of lifting ears 9 respectively. When splicing and welding the cross arm 3, the operator first hangs the traction hook 24 into the through hole on the side surface of the lifting ear 9.

[0028] The working principle provided by the utility model is as follows: the operator first welds the steel column 1 to the upper surface of the base 2. After the welding of the steel column 1 is completed, the operator hoists the installation platform 6 to the upper surface of the steel column 1. The operator clamps the U-shaped threaded rod on the outer surface of the steel column 1 and the fixed column 15. The operator passes the two ends of the two groups of U-shaped threaded rods through the four groups of through holes on the side surface of the fixed plate 16 respectively. The operator screws the nuts 17 into the two ends of the two groups of U-shaped threaded rods, tightens the nuts 17 to fix the fixed column 15 on the outer surface of the steel column 1, and then fixes the installation platform 6. The first welding connecting plate 10 is welded to the appropriate height of the side surface of the steel column 1. The operator hangs the two groups of traction hooks 24 to the two groups of lifting ears 9 through holes respectively. At, the operator starts the servo motor, and the rotation of the servo motor power output end drives the active bevel gear 18 to rotate, and the active bevel gear 18 rotates to engage the driven bevel gear 19 to rotate. When the driven bevel gear 19 rotates, it drives the reduction box 20 to rotate, so that the two ends of the rotating rod 21 rotate at a uniform speed inside the fixing ring 22, driving the steel cable 23 to be wound, so that it is convenient to hoist the connecting cross arm 3 to the upper surface of the support plate 12. After the connecting cross arm 3 is hoisted to the upper surface of the support plate 12, the operator welds the connection between the support plate 12 and the connecting cross arm 3, so that the connecting cross arm 3 is fixed. Since a triangle is formed between the diagonal support rod 11 and the steel structure column 1 and the connecting cross arm 3, the connection between the connecting cross arm 3 and the steel structure column 1 is made more stable.

[0029] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steel structure bridge that can be assembled and welded, comprising: A steel column (1), a connecting cross arm (3), a welded support structure (4), a connecting structure (5) and a lifting structure (7), characterized in that the steel column (1) is provided with two groups, the lower ends of the two groups of steel columns (1) are respectively fixedly connected to a base (2), the two groups of steel columns (1) are provided with a connecting cross arm (3) on the opposite side, and the lower surface of the connecting cross arm (3) is provided with two groups of welded support structures (4), the welded support structure (4) comprises a diagonal support rod (11), a first welded connecting plate (10) and a supporting plate (12), the upper end outer surface of one group of steel columns (1) is provided with a connecting structure (5), the connecting structure (5) comprises a U-shaped threaded rod (26) and a fixed plate (16), a mounting platform (6) is provided above the connecting structure (5), and the upper surface of the mounting platform (6) is provided with a lifting structure (7), and the lifting structure (7) comprises a servo motor (25), a reduction box (20), a rotating rod (21) and a steel cable (23).

2. The weldable steel structure bridge according to claim 1 is characterized in that: A group of second welded connecting plates (8) are respectively welded at both ends of the connecting cross arm (3); the two groups of second welded plates are respectively welded to opposite sides of the two groups of steel columns (1) at the sides away from the connecting cross arm (3); two groups of lifting ears (9) are fixedly connected to the upper surface of the connecting cross arm (3); and through holes are respectively provided on the side surfaces of the two groups of lifting ears (9).

3. The weldable steel structure bridge according to claim 1 is characterized in that: The side surface of the first welded connection plate (10) is welded to the side surface of the steel column (1); the first welded connection plate (10) is fixedly connected to a diagonal brace (11) on a side away from the steel column (1); the diagonal brace (11) is fixedly connected to a support plate (12) on one end away from the first welded connection plate (10); and the upper surface of the support plate (12) is welded to the lower surface of the connecting cross arm (3).

4. The weldable steel structure bridge according to claim 1 is characterized in that: The upper surface of the mounting platform (6) is fixedly connected to two groups of fixing clamps (13), and a group of sliding wheels (14) are rotatably connected inside the two groups of fixing clamps (13). The lower surface of the mounting platform (6) is attached to the upper surface of a group of steel structure columns (1). The lower surface of the mounting platform (6) is fixedly connected to a fixing column (15), and one side of the fixing column (15) is attached to the outer surface of the steel structure column (1) away from the connecting cross arm (3). A fixing plate (16) is provided on the side of the fixing column (15) away from the steel structure column (1), and four groups of through holes are opened on the side surface of the fixing plate (16).

5. The weldable steel structure bridge according to claim 1 is characterized in that: Two groups of U-shaped threaded rods (26) are provided. The two groups of U-shaped threaded rods (26) are respectively engaged with the outer surfaces of the steel structure column (1) and the fixed column (15). The two ends of the two groups of U-shaped threaded rods (26) respectively pass through four groups of through holes on the side surface of the fixed plate (16). The outer surfaces of the two ends of each group of U-shaped threaded rods (26) are respectively threadedly connected with nuts (17).

6. The weldable steel structure bridge according to claim 1, characterized in that: The lower surface of the servo motor (25) is fixedly connected to the upper surface of the mounting platform (6); the power output end of the servo motor (25) is fixedly connected to an active bevel gear (18); one side of the active bevel gear (18) is meshed with a driven bevel gear (19); a reduction box (20) is provided on one side of the driven bevel gear (19); the side surface of the driven bevel gear (19) is fixedly connected to a power receiving end of the reduction box (20); the lower surface of the reduction box (20) is fixedly connected to the upper surface of the mounting platform (6); the power output end of the reduction box (20) is fixedly connected to the outer surface of a rotating rod (21); a set of fixing rings (22) are respectively sleeved on both ends of the rotating rod (21); the two ends of the rotating rod (21) are rotatably connected to the inside of the fixing ring (22); and the two sets of fixing rings (22) are fixedly connected to the upper surface of the mounting platform (6).

7. The weldable steel structure bridge according to claim 1 is characterized in that: A group of steel cables (23) are fixedly connected to both ends of the rotating rod (21), respectively. The two groups of steel cables (23) are respectively wrapped around the two ends of the rotating rod (21), one side of the steel cables (23) is in contact with the outer surface of the sliding wheel (14), and one end of the two groups of steel cables (23) away from the rotating rod (21) is fixedly connected to a traction hook (24), respectively. The two groups of traction hooks (24) correspond to the two groups of lifting ears (9) respectively.

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