A bending device for seamless steel pipe machining

Abstract

The application discloses a bending device for seamless steel pipe processing and relates to the technical field of steel pipe processing.The bending device comprises a steel pipe conveying device, a supporting part, a pressure adjusting part and a bending device.Before the bending processing of the seamless steel pipe, a worker adjusts the position of the steel pipe conveying device to match the pipe diameter according to the diameter of the steel pipe to be processed.After the adjustment is completed, the steel pipe conveying device transports the steel pipe to a preset bending position, the worker sends the supporting part into the bending area inside the steel pipe, starts the pressure adjusting part, injects high-pressure hydraulic oil into the supporting part, the internal pressure of the supporting part rises and expands to tightly adhere to the inner wall of the steel pipe, then the bending device performs the bending processing on the steel pipe, after the bending work is completed, the pressure adjusting part discharges the hydraulic oil to release the pressure, the supporting part shrinks and is taken out, and the processed steel pipe is discharged.The application supports the inner wall of the steel pipe when the steel pipe is bent through the supporting part and the pressure adjusting part, and has the effect of preventing bending wrinkles.

Description

Technical Field

[0001] This invention relates to the field of steel pipe processing technology, specifically a bending device for processing seamless steel pipes. Background Technology

[0002] Seamless steel pipes, due to their excellent pressure-bearing capacity and structural strength, are widely used in petrochemical, machinery manufacturing, and fluid transportation fields, and often require bending processing during actual assembly. However, during the bending process of seamless steel pipes, the metal material in the bending area will be subjected to complex non-uniform stress. Under the action of axial compressive stress, the pipe wall on the inner side of the bend is prone to wrinkling due to local instability, resulting in increased pipe resistance. At the same time, the pipe wall on the outer side of the bend is stretched and thinned by axial tensile stress. In the absence of effective radial restraint, this stress state of external tension and internal pressure will cause deformation of the steel pipe cross-section, thereby damaging the mechanical properties and flow volume of the steel pipe.

[0003] To alleviate the above problems, traditional processing methods often involve filling the tube cavity with fine sand, casting low-melting-point alloys, or using fixed rigid mandrels for internal support. However, the filling method is cumbersome and difficult to clean afterward, making it difficult to meet the high-efficiency production requirements of modern industry. Traditional rigid mandrels, due to their fixed geometry, cannot adapt to the continuous bending of the steel pipe, which not only easily wears or scratches the inner wall of the steel pipe, but also has poor adaptability to different bending radii. Therefore, how to design a seamless steel pipe bending device with a reasonable structure that can provide dynamic and uniform support force and effectively suppress the wrinkling of the pipe wall is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a bending device for seamless steel pipe processing, so as to solve the problem of wrinkling of the inner wall of the steel pipe during the bending process in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bending device for seamless steel pipe processing, comprising a workbench, a steel pipe conveying device, a segmented support device, and a bending device, wherein the steel pipe conveying device comprises a conveying component and a pipe diameter adjusting component, and the conveying component, the pipe diameter adjusting component, and the bending device are all disposed on the workbench; the segmented support device comprises a support component and a pressure adjusting component. The supporting component consists of a central oil pipe and several supporting steel sections connected in series. The central oil pipe has a hydraulic channel inside, and each supporting steel section has a cavity inside. One end of the hydraulic channel is connected to a pressure regulating component, and the other end of the hydraulic channel leads into the cavity between each supporting steel section. The central oil pipe has radial oil distribution ports, and the hydraulic channel communicates with the supporting steel sections through these ports. The pressure regulating component, a high-pressure oil pump, is mounted on a workbench. Before bending the seamless steel pipe, the operator adjusts the working position of the pipe diameter regulating component according to the diameter of the steel pipe to be processed, using the operation control system, to match the pipe diameter. After the pipe diameter regulating component reaches the preset working position, the operator places the steel pipe onto the conveying component and drives the conveying component through the operation control system. In operation, the conveying component transports the steel pipe to the preset bending position. After the steel pipe reaches the bending position, the operator inserts the supporting component into the corresponding bending area inside the steel pipe. Subsequently, by activating the pressure regulating component, high-pressure hydraulic oil is injected into the hydraulic channel. The high-pressure hydraulic oil enters the interior of the supporting steel section through the radial oil outlet. As the amount of oil injected increases, the internal pressure of the supporting steel section rises rapidly, and the supporting steel section expands and presses tightly against the inner wall of the steel pipe. Then, the operator drives the bending device to operate through the control system. The bending device bends the steel pipe. After the bending process is completed, the bending device resets. The operator then operates the pressure regulating component through the control system to release the pressure, and the high-pressure hydraulic oil is drawn out from the central oil pipe. The supporting component retracts, and the operator removes the supporting component from the steel pipe and then unloads the processed steel pipe.

[0006] The supporting steel section includes a supporting shaft and a rubber expansion sleeve. The supporting shaft is fitted between the central oil pipe and the rubber expansion sleeve, and a sealed cavity is provided between the supporting shaft and the rubber expansion sleeve. An axial oil passage hole is provided circumferentially at the center of the supporting shaft. After the operator injects high-pressure hydraulic oil into the central oil pipe through the pressure regulating component, the high-pressure hydraulic oil flows out from the radial oil outlet on the central oil pipe, flows into the sealed cavity between the supporting shaft and the rubber expansion sleeve through the axial oil passage hole on the supporting shaft. With the continuous injection of high-pressure hydraulic oil, the rubber expansion sleeve expands outward uniformly under the internal oil pressure, gradually conforming to the inner wall of the steel pipe, forming uniform internal support for the steel pipe in the bending area. This effectively avoids the problem of wrinkles, dents, or flattening deformation of the steel pipe on the inner wall during the bending process, ensuring that the cross-section of the steel pipe remains round after bending and improving the finished product quality of seamless steel pipe bending.

[0007] The conveying component includes a drive source, a chain, and multiple conveyor roller sets. The drive source and conveyor roller sets are both mounted on a workbench. The drive source and each conveyor roller set are driven by chain meshing. Before bending the steel pipe, the operator places the steel pipe to be processed onto the conveyor roller sets. Through the control system, the drive source is operated, and the output end of the drive source drives the chain to rotate. The chain synchronously drives each conveyor roller set to rotate. The friction between the conveyor roller sets and the outer wall of the steel pipe drives the steel pipe to feed, smoothly conveying the steel pipe to the preset bending position, ensuring accurate steel pipe feeding position, and facilitating smooth bending operations.

[0008] The conveyor roller assembly includes a roller support and a pipe roller conveyor. The roller support is mounted on a worktable, and the pipe roller conveyor is rotatably mounted on the roller support. An inner sprocket and an outer sprocket are sequentially arranged at one end of the pipe roller conveyor. The drive source drives the first pipe roller conveyor via a chain meshing with the inner sprocket. The outer sprocket of the first pipe roller conveyor meshes with the outer sprocket of the second pipe roller conveyor, and the inner sprocket of the second pipe roller conveyor meshes with the inner sprocket of the third pipe roller conveyor. After starting the drive source, the drive source first drives the inner sprocket of the first pipe roller conveyor to rotate via the chain. The conveyor rollers are driven to rotate synchronously, and the outer sprockets at their ends rotate synchronously, which in turn drives the outer sprockets of the adjacent second pipe roller conveyor to rotate. After the second pipe roller conveyor rotates, the inner sprockets at its ends rotate synchronously, which in turn drives the inner sprockets of the adjacent third pipe roller conveyor to rotate. This achieves synchronous rotation of power in each group of conveyor rollers. This staggered meshing transmission method can ensure that all pipe roller conveyors rotate at the same speed, avoid slippage and misalignment during the steel pipe feeding process, further improve the stability of pipe feeding, ensure higher feeding accuracy, and prevent insufficient bending accuracy caused by pipe position deviation.

[0009] The pipe diameter adjustment component includes a clamping and transporting component and a moving component. The worktable has a moving groove and a sliding groove. The moving component is connected to the worktable and passes through the moving groove to connect with the clamping and transporting component. The clamping and transporting component is slidably mounted on the sliding groove. Before bending the steel pipe, the operator, according to the diameter of the steel pipe to be processed, operates the moving component through the control system to drive the clamping and transporting component to slide synchronously along the sliding groove, adjusting the distance between the two clamping and transporting components. This ensures that the two clamping and transporting components can precisely fit the outer wall of steel pipes of different diameters, guaranteeing both the guiding and limiting function of the steel pipe and preventing excessive compression of the outer wall of the steel pipe causing surface damage. This adapts to different processing needs and improves the versatility of the device.

[0010] The moving component includes a drive source one, a gear, a sliding groove, a rack one, and a rack two. The output end of the drive source one is connected to the gear. Both rack one and rack two are meshed with the gear. Both rack one and rack two are slidably mounted on the sliding groove. Both rack one and rack two pass through the moving groove and are connected to the clamping and transporting component. When adjusting the position of the clamping and transporting component, the operator starts the drive source one through the operation control system. The drive source one drives the gear to rotate, and rack one and rack two, meshing on both sides of the gear, will move synchronously in opposite directions along the sliding groove. This causes the two clamping and transporting components to move closer or further apart simultaneously, achieving precise synchronous adjustment of the distance between the two clamping and transporting components. This ensures that the two clamping and transporting components are always symmetrically distributed on both sides of the steel pipe conveying path, ensuring that the conveying position of the steel pipe will not shift after adjustment. This eliminates the need for manual alignment and adjustment, improving the efficiency and accuracy of pipe diameter adjustment.

[0011] The clamping and transporting components include a housing and transport wheels. Both rack one and rack two pass through a moving groove and are connected to the housing. The housing is slidably mounted on the sliding groove. A second drive source is installed inside the housing. The output end of the second drive source is connected to the transport wheels. After the two clamping and transporting components are moved to a working position that matches the diameter of the steel pipe, the steel pipe to be bent is transported between the two transport wheels. Through the control system, the second drive source is started, and the two transport wheels rotate synchronously, thus clamping and transporting the steel pipe forward without additional manual pushing. This ensures a stable feeding position, prevents slippage and deviation during transport, and improves the accuracy of bending processing.

[0012] The bending device includes a third drive source, a pressure roller, a connecting plate, and an annular pressure groove. The third drive source is located on the lower end face of the worktable. The output end of the third drive source passes through the worktable and connects to the connecting plate and the annular pressure groove. The pressure roller is located on the connecting plate. After the operator transports the steel pipe to be processed to the preset bending position, the third drive source is started through the operation control system. The third drive source rotates, driving the connecting plate and the pressure roller to feed towards the steel pipe, so that the pressure roller presses against the outer wall of the steel pipe and simultaneously inserts the corresponding bending section of the steel pipe into the annular pressure groove. As the third drive source continues to feed, the pressure roller, in conjunction with the annular pressure groove, gradually completes the bending operation of the steel pipe. During the bending process, the segmented support device continuously provides uniform support to the inside of the bending area of ​​the steel pipe to ensure uniform force during the bending process. After the bending is completed, the third drive source drives the pressure roller to reset, and the processed steel pipe can be taken out.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes the coordinated operation of a central oil pipe, several supporting steel sections, and a pressure regulating component in a segmented support device. Before bending the seamless steel pipe, the support component is inserted into the bending zone inside the pipe. High-pressure hydraulic oil is injected through the pressure regulating component, flowing into the sealed cavity through the radial oil outlet of the central oil pipe and the axial oil passage of the support shaft. This causes the rubber expansion sleeve to expand uniformly outward and adhere tightly to the inner wall of the steel pipe, achieving active, uniform, and flexible support for the inside of the pipe cavity during bending. This effectively alleviates the problems of wrinkling, collapse, and cross-sectional distortion and flattening of the inner wall during bending, ensuring the roundness of the steel pipe cross-section after bending. At the same time, the segmented supporting steel sections can adaptively deflect during the bending process, eliminating the need for a rigid support structure of fixed size customized according to the bending radius in advance. This significantly improves the adaptability to different bending parameter processing requirements and avoids rigid scratches on the inner wall of the steel pipe, effectively ensuring the processing quality of the steel pipe.

[0014] 2. This invention, through the coordinated operation of the moving component and the clamping and transporting component in the pipe diameter adjustment component, allows for flexible adjustment of the horizontal distance between the two sets of clamping and transporting components before the steel pipe officially enters the processing flow. This ensures a close fit between steel pipes of different outer diameters, achieving symmetrical adjustment and guiding transport of steel pipes of different specifications. It avoids the problem of conveying path deviation caused by traditional manual alignment, and prevents damage such as scratches or deformation to the pipe surface caused by excessive compression. This improves the positioning accuracy and stability of the feeding process, and enhances the equipment's versatility in handling multiple specifications of pipes and overall production efficiency. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is an overall isometric view of the present invention; Figure 3 This is a structural diagram of the segmented support device of the present invention; Figure 4 This is an isometric view of the segmented support device of the present invention; Figure 5 For the present invention Figure 4 A magnified view of a portion of region A in the middle; Figure 6 This is a structural diagram of the conveying component of the present invention; Figure 7 This is a structural diagram of the conveyor roller assembly of the present invention; Figure 8 This is a structural diagram of the pipe diameter adjustment component of the present invention; Figure 9 This is a structural diagram of the bending device of the present invention.

[0016] In the diagram: 1. Workbench; 11. Moving trough; 12. Slide chute; 2. Steel pipe conveying device; 21. Conveying component; 211. Drive source; 212. Chain; 213. Conveying roller assembly; 2131. Roller support; 2132. Pipe roller conveyor; 2133. Inner sprocket; 2134. Outer sprocket; 22. Pipe diameter adjustment component; 221. Clamping and transporting component; 2212. Box; 2213. Transport wheel; 222. Moving component; 2221. Drive source one; 2222. Gear; 2223. Sliding groove; 2224. Rack one; 2225. Rack two; 3. Segmented support device; 31. Support component; 311. Central oil pipe; 312. Support steel section; 3121. Support shaft; 3122. Rubber expansion sleeve; 32. Pressure regulating component; 4. Bending device; 41. Drive source three; 42. Pressure roller; 43. Connecting plate; 44. Annular pressure groove. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example: Figures 1-9 As shown, the present invention provides a technical solution: a bending device for seamless steel pipe processing, comprising a workbench 1, a steel pipe conveying device 2, a segmented support device 3, and a bending device 4. The steel pipe conveying device 2 includes a conveying component 21 and a pipe diameter adjustment component 22. The conveying component 21 includes a drive source 211, a chain 212, and multiple conveying roller groups 213. The drive source 211 and the conveying roller groups 213 are both mounted on the workbench 1. The drive source 211 and each conveying roller group 213 are connected by the chain 212 for meshing transmission. Before bending the steel pipe, the operator places the steel pipe to be processed onto the conveying roller group 213. Through the control system, the drive source 211 is operated. The output end of the drive source 211 drives the chain 212 to rotate. The chain 212 synchronously drives each conveying roller group 213 to rotate. The friction between the conveying roller group 213 and the outer wall of the steel pipe drives the steel pipe to feed, smoothly conveying the steel pipe to the preset bending position, ensuring accurate steel pipe feeding position, and facilitating smooth bending operations.

[0019] The conveyor roller assembly 213 includes a roller support 2131 and a pipe roller conveyor 2132. The roller support 2131 is mounted on the workbench 1, and the pipe roller conveyor 2132 is rotatably mounted on the roller support 2131. One end of the pipe roller conveyor 2132 is sequentially provided with an inner sprocket 2133 and an outer sprocket 2134. The drive source 211 engages with the inner sprocket 2133 of the first pipe roller conveyor 2132 via a chain 212. The outer sprocket 2134 of the first pipe roller conveyor 2132 engages with the outer sprocket 2134 of the second pipe roller conveyor 2132, and the inner sprocket 2133 of the second pipe roller conveyor 2132 engages with the inner sprocket 2133 of the third pipe roller conveyor 2132. After the drive source 211 is started, it first drives the first pipe roller conveyor via the chain 212. When the inner sprocket 2133 of the conveyor roller 2132 rotates, the first pipe roller 2132 is driven to rotate synchronously, and the outer sprocket 2134 at its end rotates synchronously, thereby driving the outer sprocket 2134 of the adjacent second pipe roller 2132 to rotate. After the second pipe roller 2132 rotates, the inner sprocket 2133 at its end rotates synchronously, thereby driving the inner sprocket 2133 of the adjacent third pipe roller 2132 to rotate. This achieves synchronous rotation of power in each group of conveyor rollers 213. This staggered meshing transmission method can ensure that the rotation speed of all pipe rollers 2132 is consistent, avoid slippage and misalignment during the steel pipe feeding process, further improve the stability of pipe feeding, ensure higher feeding accuracy, and prevent the problem of insufficient bending accuracy caused by pipe position deviation.

[0020] The pipe diameter adjustment component 22 includes a clamping and transporting component 221 and a moving component 222. The worktable 1 is provided with a moving groove 11 and a sliding groove 12. The moving component 222 is connected to the worktable 1 and passes through the moving groove 11 to connect with the clamping and transporting component 221. The clamping and transporting component 221 is slidably arranged on the sliding groove 12. Before the steel pipe is bent, the operator, according to the diameter of the steel pipe to be processed, operates the moving component 222 through the control system to drive the clamping and transporting component 221 to slide synchronously along the sliding groove 12, adjusting the distance between the two clamping and transporting components 221 so that the two clamping and transporting components 221 can fit precisely against the outer wall of steel pipes of different diameters. This ensures both the guiding and limiting function of the steel pipe and prevents excessive compression of the outer wall of the steel pipe, thus avoiding surface damage. It adapts to different processing requirements and improves the versatility of the device.

[0021] The moving component 222 includes a drive source 2221, a gear 2222, a sliding groove 2223, a rack 2224, and a rack 2225. The output end of the drive source 2221 is connected to the gear 2222. Both racks 2224 and 2225 are meshed with the gear 2222. Both racks 2224 and 2225 are slidably mounted on the sliding groove 2223. Both racks 2224 and 2225 pass through the moving groove 11 and are connected to the clamping and transporting component 221. When adjusting the position of the clamping and transporting component 221, the operator starts the control system. Drive source 1 2221 drives gear 2222 to rotate. Rack 1 2224 and rack 2225 meshing on both sides of gear 2222 will move synchronously in opposite directions along sliding groove 2223, thereby driving the two clamping and transporting components 221 to move closer or further away from each other at the same time. This achieves precise synchronous adjustment of the distance between the two clamping and transporting components 221, ensuring that the two clamping and transporting components 221 are always symmetrically distributed on both sides of the steel pipe conveying path. This ensures that the conveying position of the steel pipe will not be offset after adjustment, eliminating the need for manual alignment adjustment and improving the efficiency and accuracy of pipe diameter adjustment.

[0022] The clamping and transporting component 221 includes a housing 2212 and transporting wheels 2213. Rack 1 2224 and rack 2225 are both connected to the housing 2212 through the moving groove 11. The housing 2212 is slidably mounted on the sliding groove 12. A second drive source is installed inside the housing 2212. The output end of the second drive source is connected to the transporting wheels 2213. After the two clamping and transporting components 221 are moved to the working position that matches the diameter of the steel pipe, the steel pipe to be bent is transported between the two transporting wheels 2213. Through the control system, the second drive source is started, and the two transporting wheels 2213 rotate synchronously, which can clamp the steel pipe and transport it forward without additional manual pushing, ensuring a stable feeding position and preventing slippage or deviation during the transport process, thus improving the accuracy of bending processing.

[0023] The segmented support device 3 includes a support component 31 and a pressure regulating component 32. The support component 31 consists of a central oil pipe 311 and several support steel sections 312 connected in series. The central oil pipe 311 has a hydraulic channel inside, and the support steel sections 312 have cavities inside. One end of the hydraulic channel is connected to the pressure regulating component 32, and the other end of the hydraulic channel enters the cavity between each support steel section 312. The central oil pipe 311 has a radial oil distribution port, and the hydraulic channel is connected to the support steel section 312 through the radial oil distribution port. The pressure regulating component 32 is set on the workbench 1. After the steel pipe reaches the bending position, the operator sends the support component 31 into the corresponding bending area inside the steel pipe. Then, by activating the pressure regulating component 32, high-pressure hydraulic oil is injected into the hydraulic channel. The high-pressure hydraulic oil enters the support steel section 312 through the radial oil distribution port. As the amount of oil injected increases, the internal pressure of the support steel section 312 rises rapidly, and the support steel section 312 expands and tightly adheres to the inner wall of the steel pipe.

[0024] The support steel section 312 includes a support shaft 3121 and a rubber expansion sleeve 3122. The support shaft 3121 is sleeved between the central oil pipe 311 and the rubber expansion sleeve 3122. A sealed cavity is provided between the support shaft 3121 and the rubber expansion sleeve 3122. An axial oil passage hole is provided circumferentially at the center of the support shaft 3121. After the operator injects high-pressure hydraulic oil into the central oil pipe 311 through the pressure regulating component 32, the high-pressure hydraulic oil flows out from the radial oil distribution port on the central oil pipe 311. The axial oil passage on the support shaft 3121 flows into the sealed cavity between the support shaft 3121 and the rubber expansion sleeve 3122. With the continuous injection of high-pressure hydraulic oil, the rubber expansion sleeve 3122 expands outward uniformly under the action of internal oil pressure, gradually fitting the inner wall of the steel pipe. This forms uniform internal support for the steel pipe in the bending area, effectively avoiding the problems of wrinkles, dents or flattening deformation of the inner wall of the steel pipe during the bending process. This ensures that the cross-section of the steel pipe remains round after bending, improving the finished product quality of seamless steel pipe bending.

[0025] The bending device 4 includes a drive source 3 41, a pressure roller 42, a connecting plate 43, and an annular pressure groove 44. The drive source 3 41 is located on the lower end face of the workbench 1. The output end of the drive source 3 41 passes through the workbench 1 and is connected to the connecting plate 43 and the annular pressure groove 44. The pressure roller 42 is located on the connecting plate 43. After the operator transports the steel pipe to be processed to the preset bending position, the operator starts the drive source 3 41 through the operation control system. The drive source 3 41 rotates, driving the connecting plate 43 and the pressure roller 42 to feed towards the steel pipe, so that the pressure roller 42 presses against the outer wall of the steel pipe. At the same time, the corresponding bending section of the steel pipe is inserted into the annular pressure groove 44. As the drive source 3 41 continues to feed, the pressure roller 42 cooperates with the annular pressure groove 44 to gradually complete the bending operation of the steel pipe. During the bending process, the segmented support device 3 continuously provides uniform support to the inside of the bending area of ​​the steel pipe to ensure uniform force during the bending process. After the bending is completed, the drive source 3 41 drives the pressure roller 42 to reset, and the processed steel pipe can be taken out.

[0026] Working principle of the invention: Before the seamless steel pipe is bent, the staff starts the drive source 2221 in the pipe diameter adjustment component 22 through the control system according to the diameter of the steel pipe to be processed. The drive source 2221 drives the gear 2222 to rotate, and the racks 2224 and 2225 meshing with the two sides of the gear 2222 make synchronous movements in opposite directions in the sliding groove 2223.

[0027] Rack 1 2224 and rack 2225 pass through the moving groove 11, pulling the two boxes 2212 and the transport wheels 2213 installed on them to slide along the slide groove 12 on the workbench 1, adjusting the distance between the two clamping transport components 221 so that they fit exactly against the outer wall of the steel pipe to be processed.

[0028] After adjusting the working position to match the diameter of the steel pipe, the worker smoothly places the steel pipe to be processed onto the multiple pipe roller conveyors 2132 of the conveying component 21. After placement, the operation control system starts the drive source 211. The drive source 211 first drives the inner sprocket 2133 of the first pipe roller conveyor 2132 to rotate via the chain 212. The first pipe roller conveyor 2132 rotates synchronously under the drive, and its outer sprocket 2134 at its end rotates synchronously as well, thereby driving the outer sprocket 2134 of the adjacent second pipe roller conveyor 2132 to rotate. After the second pipe roller conveyor 2132 rotates, its inner sprocket 2133 at its end rotates synchronously, thereby driving the inner sprocket 2133 of the adjacent third pipe roller conveyor 2132 to rotate, so that the power is synchronously rotated in each group of conveying rollers 213 in sequence, conveying the steel pipe forward.

[0029] At the same time, the second drive source inside the housing 2212 is activated, driving the two transport wheels 2213 to rotate synchronously. The pipe roller conveyor 2132 and the transport wheels 2213 jointly clamp and smoothly push the steel pipe forward through friction until the steel pipe reaches the preset bending position.

[0030] After the steel pipe reaches the preset bending position, the staff will insert the support component 31 of the segmented support device 3 into the steel pipe, so that the support section composed of the central oil pipe 311 and several support steel sections 312 is precisely located in the bending area of ​​the steel pipe.

[0031] The operator activates the pressure regulating component 32 through the control system to inject high-pressure hydraulic oil into the hydraulic channel inside the central oil pipe 311. The high-pressure hydraulic oil flows out from the radial oil outlet on the central oil pipe 311, and flows into the sealed cavity between the support shaft 3121 and the rubber expansion sleeve 3122 through the axial oil hole on the support shaft 3121. As the high-pressure hydraulic oil is continuously injected, the rubber expansion sleeve 3122 expands outward uniformly under the action of internal oil pressure, gradually adhering to the inner wall of the steel pipe, forming uniform internal support for the steel pipe in the bending area.

[0032] After supporting the inner wall of the steel pipe, the drive source 3 41 is started through the operation control system. The drive source 3 41 rotates, driving the connecting plate 43 and the pressure roller 42 to feed towards the steel pipe, so that the pressure roller 42 presses against the outer wall of the steel pipe, and at the same time, the corresponding bending section of the steel pipe is inserted into the annular pressure groove 44. As the drive source 3 41 continues to feed, the pressure roller 42 cooperates with the annular pressure groove 44 to gradually complete the bending operation of the steel pipe.

[0033] After the bending process is completed, the drive source 3 41 rotates in reverse, driving the connecting plate 43 and the pressure roller 42 back to their original positions, releasing the pressure constraint on the outer wall of the steel pipe. The pressure is then released by operating the pressure regulating component 32 through the control system. High-pressure hydraulic oil is drawn out from the central oil pipe 311 and the sealed cavity. As the internal oil pressure disappears, the rubber expansion sleeve 3122 elastically contracts and resets, disengaging from the inner wall of the steel pipe. The worker then pulls the support component 31 out of the steel pipe as a whole. Subsequently, the processed seamless steel pipe is unloaded from the workbench 1, completing one work cycle.

[0034] It will be apparent 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 invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bending device for processing seamless steel pipes, characterized in that: The device includes a workbench (1), a steel pipe conveying device (2), a segmented support device (3), and a bending device (4). The steel pipe conveying device (2) includes a conveying component (21) and a pipe diameter adjustment component (22). The conveying component (21), the pipe diameter adjustment component (22), and the bending device (4) are all mounted on the workbench (1). The segmented support device (3) includes a support component (31) and a pressure adjustment component (32). The support component (31) is composed of a central oil pipe (311) and several support steel sections (312) connected in series. The central oil pipe (311) has a hydraulic channel inside, and the support steel sections (312) have cavities inside. One end of the hydraulic channel is connected to the pressure regulating component (32), and the other end of the hydraulic channel is connected to the cavity between each support steel section (312). The central oil pipe (311) has a radial oil distribution port, and the hydraulic channel is connected to the support steel section (312) through the radial oil distribution port. The pressure regulating component (32) is set on the workbench (1).

2. The bending device for seamless steel pipe processing according to claim 1, characterized in that: The supporting steel section (312) includes a supporting shaft (3121) and a rubber expansion sleeve (3122). The supporting shaft (3121) is sleeved between the central oil pipe (311) and the rubber expansion sleeve (3122). A sealed cavity is provided between the supporting shaft (3121) and the rubber expansion sleeve (3122). An axial oil passage hole is provided circumferentially at the center position of the supporting shaft (3121).

3. The bending device for seamless steel pipe processing according to claim 1, characterized in that: The conveying component (21) includes a drive source (211), a chain (212) and multiple conveying roller groups (213). The drive source (211) and the conveying roller groups (213) are both set on the workbench (1). The drive source (211) and each conveying roller group (213) are driven by the chain (212).

4. The bending device for seamless steel pipe processing according to claim 3, characterized in that: The conveying roller assembly (213) includes a roller support (2131) and a pipe roller conveyor (2132). The roller support (2131) is set on the workbench (1). The pipe roller conveyor (2132) is rotatably set on the roller support (2131). One end of the pipe roller conveyor (2132) is sequentially provided with an inner sprocket (2133) and an outer sprocket (2134). The drive source (211) is driven by meshing with the inner sprocket (2133) of the first pipe roller conveyor (2132) through a chain (212). The outer sprocket (2134) of the first pipe roller conveyor (2132) is driven by meshing with the outer sprocket (2134) of the second pipe roller conveyor (2132). The inner sprocket (2133) of the second pipe roller conveyor (2132) is driven by meshing with the inner sprocket (2133) of the third pipe roller conveyor (2132).

5. A bending device for seamless steel pipe processing according to claim 1, characterized in that: The pipe diameter adjustment component (22) includes a clamping and transporting component (221) and a moving component (222). The workbench (1) is provided with a moving groove (11) and a sliding groove (12). The moving component (222) is connected to the workbench (1). The moving component (222) passes through the moving groove (11) and is connected to the clamping and transporting component (221). The clamping and transporting component (221) is slidably disposed on the sliding groove (12).

6. A bending device for seamless steel pipe processing according to claim 5, characterized in that: The moving component (222) includes a drive source one (2221), a gear (2222), a sliding groove (2223), a rack one (2224), and a rack two (2225). The output end of the drive source one (2221) is connected to the gear (2222). The rack one (2224) and the rack two (2225) are both meshed with the gear (2222). The rack one (2224) and the rack two (2225) are both slidably disposed on the sliding groove (2223). The rack one (2224) and the rack two (2225) both pass through the moving groove (11) and are connected to the clamping and transporting component (221).

7. A bending device for seamless steel pipe processing according to claim 6, characterized in that: The clamping and transporting component (221) includes a housing (2212) and a transport wheel (2213). The first rack (2224) and the second rack (2225) both pass through the moving groove (11) and are connected to the housing (2212). The housing (2212) is slidably mounted on the sliding groove (12). The housing (2212) is equipped with a second drive source, and the output end of the second drive source is connected to the transport wheel (2213).

8. A bending device for seamless steel pipe processing according to claim 7, characterized in that: The bending device (4) includes a third drive source (41), a pressure roller (42), a connecting plate (43), and an annular pressure groove (44). The third drive source (41) is located on the lower end face of the workbench (1). The output end of the third drive source (41) passes through the workbench (1) and is connected to the connecting plate (43) and the annular pressure groove (44). The pressure roller (42) is located on the connecting plate (43).

Images