A bending device for steel structure building
By designing a bending device for steel structure buildings that includes a fixed base, a rotating shaft, and a positioning component, the problem of difficult control of the bending angle of steel pipes is solved, and convenient and precise steel pipe bending operations are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU LONGDING CONSTR ENG (GRP) CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, it is difficult to accurately control the angle when bending small steel pipes on steel structure construction sites, and the tools used are inconvenient.
A bending device comprising a fixed base, a vertical plate, a rotating shaft, an annular tube, a positioning component, and a lifting component was designed. Driven by hydraulic cylinders and pneumatic cylinders, it achieves precise bending and angle control of steel pipes.
It enables simple and convenient bending of steel pipes, accurately controls the bending angle, and adapts to steel pipes of different diameters, reducing the complexity of manual operation.
Smart Images

Figure CN224463486U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of steel structure technology, specifically a bending device for steel structure buildings. Background Technology
[0002] Steel structures are structures made of steel materials and are one of the main types of building structures. Bending of steel structures refers to the bending of building parts according to design requirements to meet the shape and functional needs of the building structure. Bending is a common processing method, often used to make components such as beams, columns, and trusses, as well as various connectors and accessories. Through bending processing, steel can be bent, twisted, stretched, and other deformations, thereby meeting various design requirements of building structures.
[0003] In the existing technology, when bending small steel pipes in steel structure construction sites, the bending is done manually. However, it is difficult to control the bending angle, and the existing tools are inconvenient to use.
[0004] Therefore, this utility model provides a bending device for steel structure buildings. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology and solve the problems raised in the background art.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A bending device for steel structure buildings according to this utility model includes a fixed base; a vertical plate is fixedly connected to the top of the fixed base; a first rotating shaft is rotatably connected to the vertical plate; a circular block is fixedly connected to the end of the first rotating shaft; a swinging component is provided on the circular block; an annular tube is provided at the end of the first rotating shaft; the cross-section of the annular tube is semi-circular; an arc-shaped tube is fixedly connected to the outer wall of the annular tube; a positioning component is provided on the arc-shaped tube; a U-shaped plate is provided on the fixed base through a lifting component; a rotating column is rotatably connected to the U-shaped plate; and arc-shaped plates are fixedly connected to both ends of the U-shaped plate.
[0007] Preferably, the lifting component includes a first hydraulic cylinder; the first hydraulic cylinder is fixedly connected to the fixed base; the output end of the first hydraulic cylinder is provided with a first hydraulic rod; and a U-shaped plate is fixedly connected to the top end of the first hydraulic rod.
[0008] Preferably, a first disk is fixedly connected to the end of the first rotating shaft; a second disk is connected to the first disk by a first bolt rod; a pair of connecting plates are fixedly connected to the outer wall of the second disk, and the ends of the pair of connecting plates are fixedly connected to the inner wall of the annular tube.
[0009] Preferably, the positioning component includes a miniature cylinder; the miniature cylinder is fixed to both sides of the arc-shaped tube by a fixing rod; the output end of the miniature cylinder is provided with a positioning piston rod; the top end of the positioning piston rod extends through into the arc-shaped tube.
[0010] Preferably, a set of threaded grooves is provided on the side wall of the vertical plate, and the set of threaded grooves is distributed in a circle, with the set of threaded grooves arranged around the circular block; a threaded column is threadedly connected in the threaded groove.
[0011] Preferably, a fixing post is fixedly connected to the outer wall of the circular block; a fixing cylinder is slidably fitted onto the outer wall of the fixing post; a handle is fixedly connected to the top of the fixing cylinder; a set of positioning grooves is formed on the outer wall of the fixing post; a second bolt rod is threadedly connected to the side wall of the fixing cylinder, and the first bolt rod extends into the positioning groove.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. The bending device for steel structure buildings described in this utility model has a fixed base that can be bolted to any position on the workbench. Then, the pipe to be bent is inserted into the arc-shaped pipe through the rotating column, and the end of the pipe is positioned by the positioning component. Then, the swing component drives the round block and the first rotating shaft to rotate, thereby driving the annular pipe to rotate and bend the inserted steel pipe. The operation is simple and convenient, and the fixed base is also easy to install and disassemble.
[0014] 2. The bending device for steel structure buildings described in this utility model, through the setting of fixed columns and fixed cylinders, and the extension and retraction length of the fixed columns and fixed cylinders through the second bolt rod, can accommodate different personnel. Moreover, the longer the length of the fixed columns and fixed cylinders, the longer the swing arm can be, thus reducing the bending force. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 ;
[0017] Figure 2 This is a three-dimensional representation of the present invention. Figure 2 ;
[0018] Figure 3 This is a partial structure of the present invention. Figure 1 ;
[0019] Figure 4 This is a partial structure of the present invention. Figure 2 ;
[0020] Figure 5 It is a 3D diagram of a ring-shaped tube;
[0021] Figure 6 This is an exploded view of the oscillating component;
[0022] In the diagram: 1. Fixed base; 11. Vertical plate; 12. First rotating shaft; 13. Circular block; 14. Annular tube; 15. Arc-shaped tube; 16. U-shaped plate; 17. Rotating column; 18. Arc-shaped plate; 2. First hydraulic cylinder; 21. First hydraulic rod; 3. First disc; 31. Second disc; 32. Connecting plate; 33. First bolt rod; 4. Miniature cylinder; 41. Positioning piston rod; 5. Threaded groove; 51. Threaded column; 6. Fixed column; 61. Fixed cylinder; 62. Positioning groove; 63. Second bolt rod. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0024] like Figures 1 to 6 As shown, the present invention discloses a bending device for steel structure buildings, comprising a fixed base 1; a vertical plate 11 fixedly connected to the top of the fixed base 1; a first rotating shaft 12 rotatably connected to the vertical plate 11; a circular block 13 fixedly connected to the end of the first rotating shaft 12; a swinging component provided on the circular block 13; an annular tube 14 provided at the end of the first rotating shaft 12; the annular tube 14 having a semi-circular cross-section; an arc-shaped tube 15 fixedly connected to the outer wall of the annular tube 14; a positioning component provided on the arc-shaped tube 15; a U-shaped plate 16 provided on the fixed base 1 via a lifting component; a rotating column 17 rotatably connected to the U-shaped plate 16; the U-shaped plate 16... Arc-shaped plates 18 are fixed to both ends. In the prior art, when bending small steel pipes in steel structure construction sites, the bending is done manually. However, the bending angle is difficult to control, and the existing tools are inconvenient to use. Therefore, in this invention, the fixed seat 1 can be installed at any workbench position by bolts. Then, the pipe to be bent is inserted into the arc-shaped pipe 15 through the rotating column 17. The end of the pipe is positioned by the positioning component. Then, the swing component drives the round block 13 and the first rotating shaft 12 to rotate, thereby driving the annular pipe 14 to rotate and bend the inserted steel pipe. The operation is simple and convenient, and the fixed seat 1 is also easy to install and disassemble.
[0025] The lifting component includes a first hydraulic cylinder 2; the first hydraulic cylinder 2 is fixedly connected to the fixed base 1; the output end of the first hydraulic cylinder 2 is provided with a first hydraulic rod 21; a U-shaped plate 16 is fixedly connected to the top of the first hydraulic rod 21; during operation, the first hydraulic cylinder 2 drives the first hydraulic rod 21 to rise and fall, thereby driving the U-shaped plate 16 to move up and down, thus facilitating the insertion of the steel pipe and the subsequent removal of the bent steel pipe.
[0026] A first disc 3 is fixedly connected to the end of the first rotating shaft 12; a second disc 31 is connected to the first disc 3 by a first bolt rod 33; a pair of connecting plates 32 are fixedly connected to the outer wall of the second disc 31, and the ends of the pair of connecting plates 32 are fixedly connected to the inner wall of the annular tube 14; during operation, the first disc 3 and the second disc 31 can be installed and disassembled by the first bolt rod 33, thereby facilitating the replacement of annular tubes 14 of different diameters. At the same time, the U-shaped plate 16 can move up and down, thereby facilitating the bending operation of the steel pipe and enabling bending of steel pipes of different diameters.
[0027] The positioning component includes a miniature cylinder 4; the miniature cylinder 4 is fixed to both sides of the arc-shaped tube 15 by a fixing rod; the output end of the miniature cylinder 4 is provided with a positioning piston rod 41; the top end of the positioning piston rod 41 extends through into the arc-shaped tube 15; during operation, the miniature cylinder 4 drives the positioning piston rod 41 to move upward, thereby positioning and inserting the inserted steel pipe, which facilitates subsequent bending processing.
[0028] A set of threaded grooves 5 are provided on the side wall of the vertical plate 11, and the set of threaded grooves 5 are distributed in a circle and arranged around the circular block 13; a threaded post 51 is threadedly connected in the threaded groove 5; during operation, through the setting of the threaded groove 5, the threaded post 51 can be threadedly connected in the threaded groove 5, thereby blocking the rotation angle of the swinging part, thus ensuring the accuracy of the bending angle of a batch of steel pipes.
[0029] A fixing post 6 is fixedly connected to the outer wall of the circular block 13; a fixing cylinder 61 is slidably fitted onto the outer wall of the fixing post 6; a handle is fixedly connected to the top of the fixing cylinder 61; a set of positioning grooves 62 are provided on the outer wall of the fixing post 6; a second bolt rod 63 is threadedly connected to the side wall of the fixing cylinder 61, and the first bolt rod 33 extends into the positioning groove 62; during operation, the fixing post 6 and the fixing cylinder 61 are set up, and the second bolt rod 63 allows the fixing post 6 and the fixing cylinder 61 to extend and retract, thus accommodating different personnel. The longer the fixing post 6 and the fixing cylinder 61 are, the longer the swing arm can be, reducing the bending force.
[0030] Working principle: The fixed base 1 can be bolted to any position on the worktable. The pipe to be bent is then inserted into the arc-shaped tube 15 via the rotating column 17. The end of the pipe is positioned by the positioning component. The swinging component drives the circular block 13 and the first rotating shaft 12 to rotate, thereby driving the annular tube 14 to rotate and bend the inserted steel pipe. The operation is simple and convenient, and the fixed base 1 is easy to install and remove. The first hydraulic cylinder 2 drives the first hydraulic rod 21 to rise and fall, thereby driving the U-shaped plate 16 to move up and down, which facilitates the insertion of the steel pipe and the subsequent removal of the bent steel pipe. The first disc 3 and the second disc 31 can be installed and removed via the first bolt rod 33, which facilitates the replacement of rings with different diameters. The U-shaped tube 14 and the U-shaped plate 16 can move up and down to facilitate bending of the steel pipe and to bend steel pipes of different diameters. The micro cylinder 4 drives the positioning piston rod 41 to move upward, thereby positioning and inserting the inserted steel pipe for subsequent bending. The threaded groove 5 allows the threaded post 51 to be threaded into the threaded groove 5, thereby blocking the rotation angle of the swinging part and ensuring the accuracy of the bending angle of a batch of steel pipes. The fixed post 6 and the fixed cylinder 61 are set, and the extension and retraction length of the fixed post 6 and the fixed cylinder 61 is adjusted by the second bolt rod 63 to accommodate different personnel. The longer the fixed post 6 and the fixed cylinder 61 are, the longer the swing arm is, thus reducing the bending force.
[0031] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A bending device for steel structure buildings, characterized in that, The device includes a fixed base; a vertical plate is fixedly connected to the top of the fixed base; a first rotating shaft is rotatably connected to the vertical plate; a circular block is fixedly connected to the end of the first rotating shaft; a swinging component is provided on the circular block; an annular tube is provided at the end of the first rotating shaft; the annular tube has a semi-circular cross-section; an arc-shaped tube is fixedly connected to the outer wall of the annular tube; a positioning component is provided on the arc-shaped tube; a U-shaped plate is provided on the fixed base via a lifting component; a rotating column is rotatably connected to the U-shaped plate; and arc-shaped plates are fixedly connected to both ends of the U-shaped plate.
2. The bending device for steel structure buildings according to claim 1, characterized in that, The lifting component includes a first hydraulic cylinder; the first hydraulic cylinder is fixedly connected to the fixed base; the output end of the first hydraulic cylinder is provided with a first hydraulic rod; and a U-shaped plate is fixedly connected to the top end of the first hydraulic rod.
3. A bending device for steel structure buildings according to claim 2, characterized in that, A first disk is fixedly connected to the end of the first rotating shaft; a second disk is connected to the first disk by a first bolt rod; a pair of connecting plates are fixedly connected to the outer wall of the second disk, and the ends of the pair of connecting plates are fixedly connected to the inner wall of the annular tube.
4. A bending device for steel structure buildings according to claim 3, characterized in that, The positioning component includes a miniature cylinder; the miniature cylinder is fixed to both sides of the arc-shaped tube by a fixing rod; the output end of the miniature cylinder is provided with a positioning piston rod; the top end of the positioning piston rod extends through into the arc-shaped tube.
5. A bending device for steel structure buildings according to claim 4, characterized in that, A set of threaded grooves is provided on the side wall of the vertical plate, and the set of threaded grooves is distributed in a circle, with the set of threaded grooves surrounding the circular block; a threaded column is threadedly connected in the threaded groove.
6. A bending device for steel structure buildings according to claim 5, characterized in that, A fixing post is fixedly connected to the outer wall of the circular block; a fixing cylinder is slidably fitted onto the outer wall of the fixing post; a handle is fixedly connected to the top of the fixing cylinder; a set of positioning grooves are opened on the outer wall of the fixing post; a second bolt rod is threadedly connected to the side wall of the fixing cylinder, and the first bolt rod extends into the positioning groove.