A large-diameter steel pipe expanding and forming device

Abstract

The application discloses a large-diameter steel pipe expanding forming equipment and relates to the technical field of expanding forming equipment.The equipment comprises an expanding assembly, a supporting base, a driving element fixed to the top of the supporting base, an auxiliary assembly fixed to the top of the expanding assembly, an expanding element, a locking element arranged on one side of the expanding element, and a force transmission element fixed to the top of the supporting base and used for locking and driving the locking element.The application effectively solves the defects of low expanding forming precision, poor operation convenience and insufficient production stability of the existing large-diameter steel pipe expanding forming equipment through the cooperative design of the expanding assembly and the auxiliary assembly, and on one hand, the tedious process of manually assisting the staff to complete the rigid locking and center correction of the steel pipe is abandoned, the labor intensity of the operators is greatly reduced, and the problems of loose locking and poor center correction accuracy caused by insufficient manual operation experience, uneven force control and calibration deviation are avoided.

Description

Technical Field

[0001] This invention relates to the field of diameter expansion forming equipment, and in particular to a large-diameter steel pipe diameter expansion forming equipment. Background Technology

[0002] In scenarios such as large-diameter steel pipe processing and forming, pipeline engineering fitting prefabrication, radial expansion and shaping of metal pipes, dimensional correction of thick-walled steel pipes, and modification of non-standard specifications of industrial pipelines, large-diameter steel pipe expansion and forming equipment is often required to control the accuracy of expansion dimensions, uniformity of pipe wall forming, overall structural load-bearing capacity, pipe material compatibility range, and forming and processing efficiency.

[0003] Existing large-diameter steel pipe expansion and forming equipment has significant deficiencies in expansion and forming accuracy, ease of operation, and production stability. During the large-diameter steel pipe expansion and forming process, key operations such as rigid locking and center correction of the steel pipe usually require manual assistance from operators throughout the process. This not only makes the operation process extremely cumbersome and greatly increases the labor intensity of operators, but also easily leads to problems such as insufficient manual operation experience, uneven force control, and calibration deviation, resulting in insecure locking and generally poor center correction accuracy, making it difficult to guarantee the coaxiality and stability of the steel pipe during the expansion process. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing large-diameter steel pipe expansion and forming equipment, the present invention is proposed.

[0006] Therefore, the problem that this invention aims to solve is that rigid locking and center correction require manual operation, which is quite cumbersome.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a large-diameter steel pipe expansion and forming device, comprising an expansion assembly including a support base, a driving component fixed to the top of the support base, an auxiliary assembly fixed to the top of the expansion assembly including an expansion component, a locking component provided on one side of the expansion component, a force transmission component fixed to the top of the support base for locking the locking component, and a correction component disposed on the top of the support base for initially limiting the steel pipe. The expanding component, fixed to the top of the driving component, is used to expand the diameter under the drive of the driving component. The transmission component, sleeved on the surface of the driving component, is used to simultaneously link the locking component and the correction component under the displacement drive of the driving component. The steel pipe is inserted into the correction component to complete the initial spring limit. The driving component starts and cooperates with the expanding component to expand the diameter of the steel pipe. During the expansion process, the transmission component drives the locking component to rigidly lock the steel pipe through the force transmission component, and then unlocks the correction component to realize the center correction of the expanded steel pipe and ensure the expansion effect.

[0008] As a preferred embodiment of the large-diameter steel pipe expansion forming equipment of the present invention, the driving component includes a first support plate fixed to the top of the support base, a magnetic expansion cone provided on one side of the first support plate, an electric push rod fixed to one side of the magnetic expansion cone for driving the magnetic expansion cone to perform linear motion, and a fixing seat fixed to one side of the first support plate for providing an installation medium for the electric push rod.

[0009] As a preferred embodiment of the large-diameter steel pipe expansion forming equipment of the present invention, the expansion component includes a fixing rod fixed to the top of the fixing seat, an expansion cylinder provided on one side of the fixing rod, a first guide rod fixed to the top of the expansion cylinder, and a guide sleeve sleeved on the surface of the first guide rod and fixed to the top of the fixing rod for guiding the first guide rod during its movement.

[0010] As a preferred embodiment of the large-diameter steel pipe expansion forming equipment of the present invention, the expansion component further includes a transmission rod slidably connected to the inner wall of the expansion cylinder, a first spring sleeved on the surface of the transmission rod, an expansion plate fixed to one side of the transmission rod for extrusion expansion, and an inclined contact component fixed to the other side of the transmission rod for transmission under the inclined extrusion action of the magnetic expansion cone.

[0011] As a preferred embodiment of the large-diameter steel pipe expansion forming equipment of the present invention, the transmission component includes: a transmission connecting plate sleeved on the surface of the magnetic expansion cone; a first extrusion block provided on one side of the transmission connecting plate; a connecting rod fixed to one side of the transmission connecting plate for driving the first extrusion block to move under the driving action of the transmission connecting plate; a telescopic sleeve fixed to one side of the first extrusion block for continuing to provide a certain displacement space for the connecting rod after the first extrusion block is blocked and cannot move; and a guide support seat sleeved on the surface of the connecting rod and fixed to one side of the support base for guiding the connecting rod during its movement.

[0012] As a preferred embodiment of the large-diameter steel pipe expansion and forming equipment of the present invention, the transmission component further includes a steel ball spiral sleeve disposed on one side of the transmission connecting plate. A first connecting plate is fixed on one side of the transmission connecting plate, a connecting crossbar is fixed on one side of the steel ball spiral sleeve, and the steel ball spiral sleeve is directly driven. The transmission connecting rod is fixed on one side of the connecting crossbar and one side of the first connecting plate, respectively, and is used to drive the connecting crossbar under the action of the transmission connecting plate.

[0013] As a preferred embodiment of the large-diameter steel pipe expansion and forming equipment of the present invention, the correction component includes a correction cylinder disposed on the top of the support base, a correction plate disposed on the inner side of the correction cylinder, a correction rod slidably connected to the inner wall of the correction cylinder and fixed to one side of the correction plate for guiding the movement of the correction plate, a support spring sleeved on the surface of the correction rod for providing elastic clamping force, a correction sliding seat disposed on one side of the correction cylinder, and a fixing connecting rod respectively fixed to one side of the correction sliding seat and one side of the correction cylinder for providing a rigid connection effect between them.

[0014] As a preferred embodiment of the large-diameter steel pipe expansion forming equipment of the present invention, the force transmission component includes a second support plate fixed to the top of the support base, a rotating shaft movably connected to one side of the second support plate, a spiral groove formed on the surface of the rotating shaft for driving the rotating shaft to rotate under the transmission action of the steel ball spiral sleeve, and a sliding vertical groove formed on the surface of the rotating shaft and communicating with the spiral groove for providing movement space for the steel ball spiral sleeve during subsequent movement.

[0015] As a preferred embodiment of the large-diameter steel pipe expansion and forming equipment of the present invention, the locking component includes: a locking cylinder fixed to the top of the support base; a spiral sleeve provided on one side of the locking cylinder; the spiral sleeve sleeved on the surface of the rotating shaft; a rotating connecting rod rotatably connected to the surface of the spiral sleeve; a sliding rod slidably connected to the inner wall of the locking cylinder and rotatably connected to one side of the rotating connecting rod, used for displacement under the transmission action of the rotating connecting rod; and a locking plate fixed to one side of the sliding rod, used for rigidly locking the steel pipe under the driving action of the sliding rod.

[0016] As a preferred embodiment of the large-diameter steel pipe expansion forming equipment of the present invention, the sliding component includes: a sliding guide rail fixed to the top of the support base; a T-shaped sliding groove is provided on the top of the sliding guide rail; a return spring is fixed to the inner wall of the T-shaped sliding groove; a fixed mounting plate is fixed to the top of the sliding guide rail; a guide rod is sleeved on the surface of the return spring and is used to provide displacement elasticity for the correction sliding seat; a sliding crossbar is slidably connected to the inner wall of the spiral groove; a second extrusion block is fixed to one side of the fixed mounting plate and is used to drive the sliding crossbar to move under the extrusion of external force; an L-shaped locking block is fixed to one side of the sliding crossbar and is used to limit the correction sliding seat; and a locking spring is sleeved on the surface of the sliding crossbar and is used to provide return elasticity for the L-shaped locking block.

[0017] The beneficial effects of this invention are as follows: Through the coordinated design of the expansion component and auxiliary components, it effectively solves the defects of existing large-diameter steel pipe expansion and forming equipment, such as low expansion and forming accuracy, poor operation convenience, and insufficient production stability. On the one hand, it eliminates the cumbersome process of manual assistance by operators to complete the rigid locking and center correction of the steel pipe throughout the entire process, greatly reducing the labor intensity of operators and avoiding problems such as insecure locking and poor center correction accuracy caused by insufficient manual operation experience, uneven force control, and calibration deviation, thus ensuring the coaxiality and stability of the steel pipe during the expansion process. On the other hand, it adds a linkage with the expansion action. The adaptive adjustment mechanism can utilize the radial displacement generated during the expansion process to trigger the linkage structure to achieve automatic rigid locking and center correction, eliminating the reliance on repeated manual adjustments and calibrations, accelerating the production cycle of expansion forming, and ensuring the long-term reliability of locking. This avoids the displacement, shaking, or even slippage of the steel pipe during high-pressure expansion operations. In addition, it eliminates quality defects such as insufficient roundness, uneven wall thickness, and uneven ends of the expanded steel pipe caused by steel pipe displacement or center offset, prevents production safety accidents such as steel pipe cracking and equipment jamming, and reduces the workload and production costs of subsequent rework and rectification. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of a large-diameter steel pipe expansion and forming equipment.

[0020] Figure 2 This is a cross-sectional view of the locking component of a large-diameter steel pipe expansion forming equipment.

[0021] Figure 3This is a structural diagram of the expansion component of a large-diameter steel pipe expansion forming equipment.

[0022] Figure 4 This is a structural diagram of the drive component of a large-diameter steel pipe expansion and forming equipment.

[0023] Figure 5 Correction components for large-diameter steel pipe expansion and forming equipment.

[0024] Figure 6 Large-diameter steel pipe expansion and forming equipment Figure 6 A magnified view of A in the middle.

[0025] In the diagram: 1. Expanding component; 11. Support base; 12. Drive component; 121. First support plate; 122. Fixed seat; 123. Electric push rod; 124. Magnetic expanding cone; 2. Auxiliary component; 21. Expanding component; 211. Expanding cylinder; 212. First guide rod; 213. Guide sleeve; 214. Fixed rod; 215. Expanding plate; 216. Transmission rod; 217. First spring; 218. Inclined contact component; 22. Transmission component; 221. Transmission connecting plate; 222. First connecting plate; 223. Transmission connecting rod; 224. Connecting crossbar; 225. Steel ball spiral sleeve; 226. Guide support seat; 227. Connecting support rod; 228. Telescopic sleeve; 229. First extrusion block; 2 3. Correcting component; 231. Correcting cylinder; 232. Correcting plate; 233. Correcting rod; 234. Support spring; 235. Correcting sliding seat; 236. Fixed connecting rod; 24. Locking component; 241. Locking cylinder; 242. Locking plate; 243. Sliding rod; 244. Rotating connecting rod; 245. Spiral sleeve; 25. Force transmission component; 251. Second support plate; 252. Spiral groove; 253. Rotating shaft; 254. Sliding vertical groove; 26. Sliding component; 261. Sliding guide rail; 262. Fixed mounting plate; 263. Guide slide rod; 264. Return spring; 265. T-shaped sliding groove; 266. Sliding crossbar; 267. L-shaped locking block; 268. Locking spring; 269. Second pressing block. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a large-diameter steel pipe expansion and forming equipment, which includes an expansion component 1 and an auxiliary component 2.

[0030] Through the collaborative design of the expansion component 1 and auxiliary component 2, the shortcomings of existing large-diameter steel pipe expansion and forming equipment, such as low expansion and forming accuracy, poor operation convenience, and insufficient production stability, are effectively solved. On the one hand, it eliminates the cumbersome process of manual assistance by operators to complete the rigid locking and center correction of the steel pipe throughout the entire process, greatly reducing the labor intensity of operators and avoiding problems such as insecure locking and poor center correction accuracy caused by insufficient manual operation experience, uneven force control, and calibration deviation. This ensures the coaxiality and stability of the steel pipe during the expansion process. On the other hand, it adds an adaptive mechanism that is linked to the expansion action. The adjustable mechanism can utilize the radial displacement generated during the expansion process to trigger the linkage structure to achieve automatic rigid locking and center correction, eliminating the reliance on repeated manual adjustments and calibrations, accelerating the production cycle of expansion forming, and ensuring the long-term reliability of locking. This prevents steel pipe displacement, shaking, or even slippage during high-pressure expansion operations. Furthermore, it eliminates quality defects such as insufficient roundness, uneven wall thickness, and misaligned ends of the expanded steel pipe caused by steel pipe displacement or center offset, prevents production safety accidents such as steel pipe cracking and equipment jamming, and reduces the workload and production costs of subsequent rework and rectification.

[0031] Specifically, the diameter expansion assembly 1 includes a support base 11, and a drive component 12 is fixed to the top of the support base 11.

[0032] Specifically, auxiliary component 2 is fixed to the top of expansion component 1 and includes expansion component 21. A locking component 24 is provided on one side of expansion component 21. Force transmission component 25 is fixed to the top of support base 11 and is used to lock and drive the locking component 24. Correction component 23 is provided on the top of support base 11 and is used to initially limit the steel pipe.

[0033] The diameter expanding component 21 is fixed to the top of the driving component 12 and is used to expand the diameter under the drive of the driving component 12. The transmission component 22 is sleeved on the surface of the driving component 12 and is used to simultaneously link the locking component 24 and the correction component 23 under the displacement drive of the driving component 12.

[0034] Specifically, the steel pipe is inserted into the correction component 23 to complete the initial spring limit. The drive component 12 starts to cooperate with the expansion component 21 to expand the diameter of the steel pipe. During the expansion process, the transmission component 22 drives the locking component 24 to rigidly lock the steel pipe through the force transmission component 25, and then unlocks the correction component 23 to realize the center correction of the expanded steel pipe and ensure the expansion effect.

[0035] Example 2, refer to Figures 2-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, the driving component 12 includes a first support plate 121 fixed to the top of the support base 11, a magnetic expansion cone 124 is provided on one side of the first support plate 121, an electric push rod 123 is fixed to one side of the magnetic expansion cone 124 for driving the magnetic expansion cone 124 to perform linear motion, and a fixing seat 122 is fixed to one side of the first support plate 121 for providing an installation medium for the electric push rod 123.

[0037] The driving component 12 provides the core power for the overall device, and the first support plate 121 forms a rigid support structure; the electric push rod 123 outputs stable linear power, driving the magnetic expansion cone 124 to reciprocate; the magnetic expansion cone 124 realizes power reversal through inclined surface cooperation, and at the same time uses magnetic adsorption to ensure connection stability, and can also provide a certain magnetic pull during the reset process; the fixed seat 122 ensures that the electric push rod 123 is firmly installed and operates without shaking.

[0038] Specifically, the expanding component 21 includes a fixing rod 214 fixed to the top of the fixing base 122, an expanding cylinder 211 is provided on one side of the fixing rod 214, a first guide rod 212 is fixed to the top of the expanding cylinder 211, and a guide sleeve 213 is sleeved on the surface of the first guide rod 212 and fixed to the top of the fixing rod 214, for guiding the first guide rod 212 during its movement.

[0039] The expanding component 21 is the core execution structure for expanding the diameter of the steel pipe, and the fixing rod 214 provides support for the expanding cylinder 211. The expanding cylinder 211 is inserted into the steel pipe as a reference for the expanding action. The first guide rod 212 cooperates with the guide sleeve 213 to ensure that the expanding cylinder 211 moves smoothly along a straight line and avoids uneven expansion caused by skew.

[0040] Specifically, the expanding component 21 also includes a transmission rod 216 slidably connected to the inner wall of the expanding cylinder 211. A first spring 217 is sleeved on the surface of the transmission rod 216. An expanding plate 215 is fixed to one side of the transmission rod 216 for extrusion expansion. An inclined contact component 218 is fixed to the other side of the transmission rod 216 for transmission under the inclined extrusion action of the magnetic expanding cone 124.

[0041] The inclined contact 218 is attached to the inclined surface of the magnetic expanding cone 124 and magnetically connected, converting the axial linear motion into radial expansion motion; the transmission rod 216 drives the expanding plate 215 to expand outward, uniformly squeezing and expanding the inner wall of the steel pipe; the first spring 217 provides a reset force, and when the magnetic expanding cone 124 is withdrawn, it drives the transmission rod 216 and the expanding plate 215 to automatically retract, making it easy to remove the steel pipe.

[0042] Specifically, the transmission component 22 includes a transmission connecting plate 221 sleeved on the surface of the magnetic expansion cone 124, a first pressing block 229 provided on one side of the transmission connecting plate 221, a connecting rod 227 fixed to one side of the transmission connecting plate 221 for driving the first pressing block 229 to move under the driving action of the transmission connecting plate 221, a telescopic sleeve 228 fixed to one side of the first pressing block 229 for continuing to provide a certain displacement space for the connecting rod 227 after the first pressing block 229 is blocked and cannot move, and a guide support 226 sleeved on the surface of the connecting rod 227 and fixed to one side of the support base 11 for guiding the connecting rod 227 during its movement.

[0043] The transmission component 22 realizes the synchronous linkage of the diameter expansion action, the correction action, and the locking action. The transmission connecting plate 221 moves synchronously with the magnetic diameter expansion cone 124. The connecting rod 227 transmits power to the first extrusion block 229 to drive the correction component to move. The telescopic sleeve 228 plays an overload protection role to avoid damage to the components due to excessive power after the correction is in place. The guide support seat 226 ensures that the connecting rod 227 moves smoothly without deviation.

[0044] Specifically, the transmission component 22 also includes a steel ball screw sleeve 225 disposed on one side of the transmission connecting plate 221. A first connecting plate 222 is fixed on one side of the transmission connecting plate 221, a connecting crossbar 224 is fixed on one side of the steel ball screw sleeve 225, and is used to directly drive the steel ball screw sleeve 225. A transmission connecting rod 223 is fixed on one side of the connecting crossbar 224 and one side of the first connecting plate 222 respectively, and is used to drive the connecting crossbar 224 under the action of the transmission connecting plate 221.

[0045] The first connecting plate 222 and the transmission link 223 form a transmission mechanism, which transmits the axial movement of the magnetic expansion cone 124 to the connecting crossbar 224; the connecting crossbar 224 drives the steel ball spiral sleeve 225 to move synchronously, providing power for the subsequent locking action, and realizing the synchronous triggering of expansion and locking.

[0046] Specifically, the correction component 23 includes a correction cylinder 231 disposed on the top of the support base 11, a correction plate 232 disposed on the inner side of the correction cylinder 231, a correction rod 233 slidably connected to the inner wall of the correction cylinder 231 and fixed to one side of the correction plate 232 for guiding the movement of the correction plate 232, a support spring 234 sleeved on the surface of the correction rod 233 for providing elastic clamping force, a correction sliding seat 235 disposed on one side of the correction cylinder 231, and a fixing rod 236 fixed to one side of the correction sliding seat 235 and one side of the correction cylinder 231 respectively for providing a rigid connection between them.

[0047] The straightening component 23 is used for automatic centering and positioning of the steel pipe before diameter expansion. The first pressing block 229 pushes the straightening sliding seat 235 to move, which drives the straightening cylinder 231 and the straightening plate 232 to clamp the steel pipe. The straightening rod 233 ensures that the straightening plate 232 moves smoothly. The support spring 234 provides elastic buffering to avoid damage to the surface of the steel pipe by rigid clamping, and at the same time adapts to the straightening requirements of steel pipes of different diameters.

[0048] Specifically, the force transmission component 25 includes a second support plate 251 fixed to the top of the support base 11. A rotating shaft 253 is movably connected to one side of the second support plate 251. A spiral groove 252 is formed on the surface of the rotating shaft 253 to drive the rotating shaft 253 to rotate under the transmission action of the steel ball spiral sleeve 225. A sliding vertical groove 254 is formed on the surface of the rotating shaft 253 and communicates with the spiral groove 252 to provide movement space for the steel ball spiral sleeve 225 during subsequent movement.

[0049] The force transmission component 25 converts linear motion into rotational motion. When the steel ball spiral sleeve 225 moves along the spiral groove 252, it drives the rotating shaft 253 to rotate. The sliding vertical groove 254 realizes the idle stroke design. When the rotating shaft 253 rotates to the locked position, the steel ball spiral sleeve 225 can continue to move along the sliding vertical groove 254 without affecting the subsequent diameter expansion action.

[0050] Specifically, the locking component 24 includes a locking cylinder 241 fixed to the top of the support base 11, a spiral sleeve 245 provided on one side of the locking cylinder 241, the spiral sleeve 245 being sleeved on the surface of the rotating shaft 253, a rotating connecting rod 244 being rotatably connected to the surface of the spiral sleeve 245, a sliding rod 243 being slidably connected to the inner wall of the locking cylinder 241 and rotatably connected to one side of the rotating connecting rod 244, used to move under the transmission action of the rotating connecting rod 244, and a locking plate 242 fixed to one side of the sliding rod 243, used to complete the rigid locking of the steel pipe under the driving action of the sliding rod 243.

[0051] The locking component 24 automatically and rigidly locks the steel pipe during the expansion process. The rotating shaft 253 rotates and drives the spiral sleeve 245 to move axially. The spiral sleeve 245 drives the sliding rod 243 to slide along the locking cylinder 241 through the rotating connecting rod 244, which drives the locking plate 242 to clamp the outer wall of the steel pipe, preventing the steel pipe from shifting or moving during the expansion process, and ensuring the expansion accuracy and forming quality.

[0052] Example 3, referring to Figures 2-6 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0053] Specifically, the sliding component 26 includes a sliding guide rail 261 fixed to the top of the support base 11, a T-shaped sliding groove 265 on the top of the sliding guide rail 261, a return spring 264 fixed to the inner wall of the T-shaped sliding groove 265, a fixed mounting plate 262 fixed to the top of the sliding guide rail 261, a guide rod 263 sleeved on the surface of the return spring 264 to provide displacement elasticity for the correction sliding seat 235, a sliding crossbar 266 slidably connected to the inner wall of the spiral groove 252, a second pressing block 269 fixed to one side of the fixed mounting plate 262 to drive the sliding crossbar 266 to move under the action of external force, an L-shaped locking block 267 fixed to one side of the sliding crossbar 266 to limit the correction sliding seat 235, and a locking spring 268 sleeved on the surface of the sliding crossbar 266 to provide return elasticity for the L-shaped locking block 267.

[0054] When in use, the steel pipe to be expanded is inserted from the end away from the expanding part 21, passing through the inside of the straightening cylinder 231. The outer wall of the steel pipe pushes the straightening plate 232 to move outward, and the support spring 234 is compressed. The initial positioning of the steel pipe is completed by the elastic clamping force, which can adapt to the rapid feeding requirements of steel pipes of different diameters and prevent the steel pipe from tipping or shifting during the feeding process.

[0055] The electric push rod 123 is activated, which pushes the magnetic expansion cone 124 to move forward along the axial direction, causing the transmission connecting plate 221 of the transmission component 22 to move forward synchronously. The transmission connecting plate 221 drives the first pressing block 229 to move forward through the connecting support rod 227. When the first pressing block 229 contacts the second pressing block 269 of the sliding component 26, it presses the second pressing block 269, causing the sliding cross bar 266 to slide along the T-shaped sliding groove 265. The locking spring 268 is stretched, and the L-shaped locking block 267 moves outward synchronously, completing the unlocking of the correction component 23.

[0056] After the correction sliding seat 235 is unlocked, the compressed reset spring 264 instantly releases its elastic potential energy, pushing the correction sliding seat 235 to move rapidly away from the expansion member 21 along the sliding guide rail 261. This causes the correction cylinder 231 and the correction plate 232 to move synchronously to the other end of the steel pipe. Multiple sets of evenly distributed correction plates 232 form synchronous elastic clamps on both ends of the steel pipe, automatically adjusting the steel pipe axis to precisely align it with the axis of the expansion cylinder 211, thus achieving automatic center correction. The guide slide rod 263 ensures that the correction sliding seat 235 moves smoothly without deviation, and the support spring 234 provides elastic buffering to avoid damage to the surface of the steel pipe caused by rigid clamping.

[0057] The transmission connecting plate 221 continues to move forward. At this time, due to the presence of the telescopic sleeve 228, the connecting support rod 227 is retracted. The transmission connecting plate 221 drives the connecting crossbar 224 to move synchronously through the first connecting plate 222 and the transmission connecting rod 223, driving the steel ball spiral sleeve 225 to slide along the spiral groove 252 on the surface of the rotating shaft 253 of the force transmission component 25, converting the linear motion into the rotational motion of the rotating shaft 253; the rotation of the rotating shaft 253 drives the spiral sleeve 245 of the locking component 24 to pass through. The steel pipe moves axially via a threaded connection. The rotating connecting rod 244 pushes the sliding rod 243 to slide inward along the inner wall of the locking cylinder 241, causing the locking plate 242 to converge towards the center simultaneously, forming a rigid clamping and locking on the outer wall of the steel pipe. When the steel ball spiral sleeve 225 slides to the end of the spiral groove 252 and enters the sliding vertical groove 254, the rotating shaft 253 stops rotating, the locking action is completed, and the steel ball spiral sleeve 225 can continue to move along the sliding vertical groove 254 without affecting the subsequent diameter expansion action.

[0058] The magnetic expanding cone 124 continues to advance forward, pressing the inclined contact 218 through the inclined surface, which drives the transmission rod 216 to slide radially outward along the inner wall of the expanding cylinder 211. The first spring 217 is compressed, and the expanding plate 215 expands outward simultaneously, uniformly pressing and expanding the inner wall of the steel pipe. The first guide rod 212 cooperates with the guide sleeve 213 to ensure that the expanding cylinder 211 moves without deviation, ensuring that the steel pipe has uniform roundness and consistent wall thickness after expansion.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-diameter steel pipe expansion and forming equipment, characterized in that: The components include: a diameter expansion assembly (1), including a support base (11), a driving component (12) fixed to the top of the support base (11); an auxiliary assembly (2), fixed to the top of the diameter expansion assembly (1), including a diameter expansion component (21), a locking component (24) provided on one side of the diameter expansion component (21); a force transmission component (25), fixed to the top of the support base (11), used to lock and drive the locking component (24); a correction component (23), provided on the top of the support base (11), used to initially limit the steel pipe; and a sliding component (26), fixed... At the top of the support base (11), the transmission component (22) is sleeved on the surface of the drive component (12) and is used to simultaneously link the locking component (24) and the correction component (23) under the displacement drive of the drive component (12). The steel pipe is inserted into the correction component (23) to complete the initial spring limit. The drive component (12) starts to cooperate with the expansion component (21) to expand the diameter of the steel pipe. During the expansion process, the transmission component (22) drives the locking component (24) through the force transmission component (25) to rigidly lock the steel pipe, and then unlocks the correction component (23) to realize the center correction of the expanded steel pipe and ensure the expansion effect.

2. The large-diameter steel pipe expansion and forming equipment as described in claim 1, characterized in that: The driving component (12) includes a first support plate (121) fixed to the top of the support base (11), a magnetic expansion cone (124) is provided on one side of the first support plate (121), an electric push rod (123) is fixed to one side of the magnetic expansion cone (124) for driving the magnetic expansion cone (124) to perform linear motion, and a fixed seat (122) is fixed to one side of the first support plate (121) for providing an installation medium for the electric push rod (123).

3. The large-diameter steel pipe expansion and forming equipment as described in claim 2, characterized in that: The expanding member (21) includes a fixing rod (214) fixed to the top of the fixing seat (122), an expanding cylinder (211) is provided on one side of the fixing rod (214), a first guide rod (212) is fixed to the top of the expanding cylinder (211), and a guide sleeve (213) is sleeved on the surface of the first guide rod (212) and fixed to the top of the fixing rod (214) for guiding the first guide rod (212) during its movement.

4. The large-diameter steel pipe expansion and forming equipment as described in claim 1 or 3, characterized in that: The expanding component (21) also includes a transmission rod (216) slidably connected to the inner wall of the expanding cylinder (211). A first spring (217) is sleeved on the surface of the transmission rod (216). An expanding plate (215) is fixed to one side of the transmission rod (216) for extrusion expansion. An inclined contact component (218) is fixed to the other side of the transmission rod (216) for transmission under the inclined extrusion action of the magnetic expanding cone (124).

5. The large-diameter steel pipe expansion and forming equipment as described in claim 1, characterized in that: The transmission component (22) includes a transmission connecting plate (221) sleeved on the surface of the magnetic expansion cone (124). A first pressing block (229) is provided on one side of the transmission connecting plate (221). A connecting rod (227) is fixed to one side of the transmission connecting plate (221) and is used to drive the first pressing block (229) to move under the driving action of the transmission connecting plate (221). A telescopic sleeve (228) is fixed to one side of the first pressing block (229) and is used to continue to provide a certain displacement space for the connecting rod (227) after the first pressing block (229) is blocked and cannot move. A guide support (226) is sleeved on the surface of the connecting rod (227) and fixed to one side of the support base (11) and is used to guide the connecting rod (227) during its movement.

6. The large-diameter steel pipe expansion and forming equipment as described in claim 5, characterized in that: The transmission component (22) also includes a steel ball spiral sleeve (225) disposed on one side of the transmission connecting plate (221). A first connecting plate (222) is fixed on one side of the transmission connecting plate (221), a connecting crossbar (224) is fixed on one side of the steel ball spiral sleeve (225), and is used to directly drive the steel ball spiral sleeve (225). A transmission connecting rod (223) is fixed on one side of the connecting crossbar (224) and one side of the first connecting plate (222), respectively, and is used to drive the connecting crossbar (224) under the action of the transmission connecting plate (221).

7. The large-diameter steel pipe expansion and forming equipment as described in claim 6, characterized in that: The correction component (23) includes a correction cylinder (231) disposed on the top of the support base (11), a correction plate (232) disposed on the inner side of the correction cylinder (231), a correction rod (233) slidably connected to the inner wall of the correction cylinder (231) and fixed to one side of the correction plate (232) for guiding the movement of the correction plate (232), a support spring (234) sleeved on the surface of the correction rod (233) for providing elastic clamping force, a correction sliding seat (235) disposed on one side of the correction cylinder (231), and a fixing link (236) fixed to one side of the correction sliding seat (235) and one side of the correction cylinder (231) respectively for providing a rigid connection effect between them.

8. The large-diameter steel pipe expansion and forming equipment as described in claim 7, characterized in that: The force transmission component (25) includes a second support plate (251) fixed to the top of the support base (11). A rotating shaft (253) is movably connected to one side of the second support plate (251). A spiral groove (252) is opened on the surface of the rotating shaft (253) to drive the rotating shaft (253) to rotate under the transmission action of the steel ball spiral sleeve (225). A sliding vertical groove (254) is opened on the surface of the rotating shaft (253) and communicates with the spiral groove (252) to provide movement space for the steel ball spiral sleeve (225) during subsequent movement.

9. The large-diameter steel pipe expansion and forming equipment as described in claim 8, characterized in that: The locking component (24) includes a locking cylinder (241) fixed to the top of the support base (11), a spiral sleeve (245) provided on one side of the locking cylinder (241), the spiral sleeve (245) sleeved on the surface of the rotating shaft (253), a rotating connecting rod (244) rotatably connected to the surface of the spiral sleeve (245), a sliding rod (243) slidably connected to the inner wall of the locking cylinder (241) and rotatably connected to one side of the rotating connecting rod (244), used to move under the transmission action of the rotating connecting rod (244), and a locking plate (242) fixed to one side of the sliding rod (243), used to complete the rigid locking of the steel pipe under the driving action of the sliding rod (243).

10. The large-diameter steel pipe expansion and forming equipment as described in claim 1 or 9, characterized in that: The sliding component (26) includes a sliding guide rail (261) fixed to the top of the support base (11), a T-shaped sliding groove (265) opened on the top of the sliding guide rail (261), a return spring (264) fixed on the inner wall of the T-shaped sliding groove (265), a fixed mounting plate (262) fixed to the top of the sliding guide rail (261), a guide rod (263) sleeved on the surface of the return spring (264), a sliding crossbar (266) slidably connected to the inner wall of the spiral groove (252), a second pressing block (269) fixed to one side of the fixed mounting plate (262) for driving the sliding crossbar (266) to move under the action of external force pressing, an L-shaped locking block (267) fixed to one side of the sliding crossbar (266), and a locking spring (268) sleeved on the surface of the sliding crossbar (266) for providing a return spring force for the L-shaped locking block (267).

Images