Pipe end flaring equipment for large-diameter ultrathin-wall seamless steel pipe production
By designing hydraulically driven gears and head flaring equipment, the problems of diameter expansion accuracy and specification adaptability of large-diameter seamless steel pipes are solved, and efficient and uniform steel pipe flaring effect is achieved.
Patent Information
- Application Number
- CN202510632689.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-07-04
AI Technical Summary
The prior art is difficult to efficiently expand large-diameter seamless steel pipes, and the diameter expansion accuracy is not high, so it cannot meet the needs of multiple specifications.
A flaring device including hydraulic cylinders, gears and heads is designed. The heads are flared by hydraulic drive gears. The heads can be replaced to meet different specifications and to adapt to steel pipes of different lengths through telescopic mechanisms and locking mechanisms.
It achieves efficient and accurate steel pipe flaring, ensures uniformity of wall thickness after flaring, meets multiple specifications, and avoids damage caused by the locking mechanism due to different steel pipe lengths.
Smart Images
Figure CN120243752A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of the production of large-diameter high-performance ultra-thin-wall seamless steel pipes, and specifically relates to a pipe end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes. Background Technique
[0002] Seamless steel pipes are made by piercing a whole round steel, and the steel pipes without welds on the surface are called seamless steel pipes. Large-diameter seamless steel pipes are mainly used as general fluid pipes, pipes for oil and natural gas pipelines, pressure vessels and storage and transportation pipelines. The market demand for large-diameter seamless steel pipes is increasing continuously. At present, limited by the specifications of domestic pipe rolling mills, the hot expansion process of large-diameter seamless steel pipes can expand seamless steel pipes into larger specifications. Based on the independently developed hot expansion process of large-diameter seamless steel pipes by our company, a pipe end flaring device with high efficiency, high expansion accuracy and capable of adapting to the expansion requirements of steel pipes of various specifications has been researched and designed. Summary of the Invention
[0003] In view of the deficiencies of the prior art, the present invention provides a pipe end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes to solve the problems raised in the above background technique.
[0004] To achieve the above object, the present invention provides the following technical solution: A pipe end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes, including a base, a first hydraulic cylinder is fixedly connected above the base, a positioning block is fixedly connected to the output end of the first hydraulic cylinder, a second hydraulic cylinder is fixedly connected above the base, a circular plate is fixedly connected to the output end of the second hydraulic cylinder, a first motor is fixedly connected to the outside of the circular plate, a second gear is fixedly connected to the output end of the first motor, a first gear is fixedly connected to one side of the circular plate, the first gear meshes with the second gear above it, a top head is threadedly connected to one side of the first gear, the volumes of the three top heads increase sequentially in the clockwise direction, a telescopic mechanism is arranged above the base, and a locking mechanism is arranged above the base; The telescopic mechanism is used to adapt to seamless steel pipes of different lengths; The locking mechanism is used to limit the seamless steel pipe.
[0005] In the above technical solution, further, the telescopic mechanism includes a slide bar, the slide bar is fixedly connected to the middle above the base, a sliding plate is slidably connected above the slide bar, five sliding plates are equidistantly distributed, and the sliding plate in the middle position is fixedly connected to the base.
[0006] In the above technical solution, further, connecting rods are rotatably connected above the five sliding plates, a connecting block is fixedly connected below one of the sliding plates, and the connecting block is slidably connected to the above of the base.
[0007] In the above technical solution, further, a screw rod is rotatably connected below the base, the outer wall of the screw rod is threadedly connected to the connecting block, a second motor is fixedly connected below the base, and the output end of the second motor is fixedly connected to one end of the screw rod. Conveyor rollers are rotatably connected above the five sliding plates, and a support rod is fixedly connected to one side of one of the sliding plates.
[0008] In the above technical solution, further, the locking mechanism includes a mounting seat, the mounting seat is slidably connected above the base, and the outside of the mounting seat is fixedly connected to the support rod.
[0009] In the above technical solution, further, a cylinder is fixedly connected to the middle of the mounting seat, a worm gear is rotatably connected to the outer wall of the cylinder, a synchronous rod is fixedly connected to one side of the worm gear, and a circular ring is fixedly connected to the end of the synchronous rod away from the worm gear. The circular ring is rotatably connected to the outer wall of the cylinder.
[0010] In the above technical solution, further, a worm is rotatably connected above the mounting seat, the outer wall of the worm is meshed with the upper part of the worm gear, and a handle is fixedly connected to one end of the worm.
[0011] In the above technical solution, further, a first rotating block and a second rotating block are rotatably connected to the outside of the cylinder, the worm gear and the circular ring. The length of the second rotating block is greater than that of the first rotating block. An extrusion rod is fixedly connected to the inside of a group of the first rotating blocks and the second rotating blocks, and the outer wall of the extrusion rod is slidably connected to the inside of the other group of corresponding first rotating blocks or second rotating blocks.
[0012] The beneficial effects of the present invention: 1. In the present invention, after the steel pipe is fixed in position, the pipe end is flared by the top head to form a flared shape. There are three top heads with different sizes distributed at 120° on the first gear. The first gear is pushed by the second hydraulic cylinder. According to different flaring specifications, the top heads flare the pipe end from small to large in sequence, and the flaring process of a steel pipe can be completed. The top head is threadedly connected to the first gear, and top heads of different sizes can be replaced according to different diameter expansion amounts. The entire first gear is axially driven by the hydraulic cylinder to flare the steel pipe. This flaring device can meet the flaring requirements of different specifications, ensure the wall thickness uniformity of the flared steel pipe, and improve the flaring efficiency.
[0013] 2. In the present invention, the second motor can be started first according to the length of the seamless steel pipe. After the second motor is started, it will drive the screw rod to rotate. When the screw rod rotates, under the transmission of the screw rod and the connecting block, since the sliding plate located in the middle is fixedly connected above the base and the five sliding plates are driven by a connecting rod, the distance between the five sliding plates will change, thereby changing the distance between the five conveying rollers. In addition, under the action of the support rod, when relative sliding occurs between the sliding plate and the sliding bar, the mounting seat will slide above the base along with the sliding plate on one side. Through this design, it is more convenient for the device when not flaring seamless steel pipes of different lengths, avoiding the problem that the locking mechanism and the end of the seamless steel pipe are relatively close due to the short seamless steel pipe, resulting in the top head 16 squeezing and damaging the locking mechanism during flaring. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the positional relationship between the screw rod and the base in the present invention; Figure 3 is Figure 1 an enlarged structural schematic diagram of area A in Figure 4 is a schematic diagram of the positional relationship between the worm and the mounting seat in the present invention; Figure 5 is a schematic diagram of the connection relationship between the worm gear, the ring and the cylinder in the present invention; Figure 6 is a schematic diagram of the connection relationship between the top head and the second hydraulic cylinder in the present invention.
[0015] In the figure: 1, base; 11, first hydraulic cylinder; 12, positioning block; 13, second hydraulic cylinder; 14, round plate; 15, first gear; 16, top head; 17, first motor; 18, second gear; 2, telescopic mechanism; 21, sliding bar; 22, sliding plate; 23, conveying roller; 24, connecting block; 25, connecting rod; 26, screw rod; 27, second motor; 28, support rod; 3, locking mechanism; 31, mounting seat; 32, cylinder; 33, worm gear; 34, synchronous rod; 35, ring; 36, first rotating block; 37, second rotating block; 38, extrusion rod; 39, worm; 391, handle. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0017] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1
[0018] Please refer to Figure 1 - Figure 6, A tube end flaring device for the production of large-diameter ultra-thin-walled seamless steel pipes, including a base 1. Above the base 1, a first hydraulic cylinder 11 is fixedly connected. The output end of the first hydraulic cylinder 11 is fixedly connected with a positioning block 12. Above the base 1, a second hydraulic cylinder 13 is fixedly connected. The output end of the second hydraulic cylinder 13 is fixedly connected with a circular plate 14. The outside of the circular plate 14 is fixedly connected with a first motor 17. The output end of the first motor 17 is fixedly connected with a second gear 18. One side of the circular plate 14 is fixedly connected with a first gear 15. Above the first gear 15, it meshes with the second gear 18. One side of the first gear 15 is threadedly connected with a top head 16. The volumes of the three top heads 16 increase in sequence in the clockwise direction. Above the base 1, a telescopic mechanism 2 is provided. Above the base 1, a locking mechanism 3 is provided; the telescopic mechanism 2 is used to adapt to seamless steel pipes of different lengths; the locking mechanism 3 is used to limit the seamless steel pipe. The telescopic mechanism 2 includes a slide bar 21. The slide bar 21 is fixedly connected to the middle above the base 1. Above the slide bar 21, a sliding plate 22 is slidably connected. Five sliding plates 22 are equidistantly distributed. The sliding plate 22 in the middle position is fixedly connected to the base 1. Above the five sliding plates 22, connecting rods 25 are rotatably connected. Below one sliding plate 22, a connecting block 24 is fixedly connected. The connecting block 24 is slidably connected to the above of the base 1. Below the base 1, a screw rod 26 is rotatably connected. The outer wall of the screw rod 26 is threadedly connected to the connecting block 24. Below the base 1, a second motor 27 is fixedly connected. The output end of the second motor 27 is fixedly connected to one end of the screw rod 26. Above the five sliding plates 22, conveying rollers 23 are rotatably connected. One side of one sliding plate 22 is fixedly connected with a support rod 28.
[0019] The specific implementation process of this embodiment is as follows: When flaring the end of the seamless steel pipe, the second motor 27 can be started according to the length of the seamless steel pipe. After the second motor 27 is started, it will drive the screw rod 26 to rotate. When the screw rod 26 rotates, under the transmission of the screw rod 26 and the connecting block 24, since the sliding plate 22 in the middle is fixedly connected above the base 1 and the five sliding plates 22 are driven by the connecting rod 25, the distance between the five sliding plates 22 will change, so that the distance between the five conveying rollers 23 will change. After the distance between the conveying rollers 23 is adjusted, one end of the seamless steel pipe on the conveying rollers 23 can be attached to one side of the positioning block 12, and the other end of the seamless steel pipe can be passed through the inside of the locking mechanism 3. The locking mechanism 3 will complete the limitation of the seamless steel pipe. Subsequently, the first motor 17 is started according to the size of the flare required. After the first motor 17 is started, since the first gear 15 and the second gear 18 are engaged, the first motor 17 will drive the first gear 15 to rotate after being started, and the center of the plug 16 to be inserted will be rotated to the center of the seamless steel pipe and be on the same straight line. After the above process is completed, the second hydraulic cylinder 13 is started. When the output end of the second hydraulic cylinder 13 extends, the plug 16 concentric with the seamless steel pipe will be inserted into the inside of the seamless steel pipe, thus completing the flaring of the end of the seamless steel pipe. Through this design, it is more convenient to flare seamless steel pipes of different lengths in this device, avoiding the problem that the locking mechanism 3 and the end of the seamless steel pipe are relatively close due to the short seamless steel pipe, resulting in the plug 16 squeezing and damaging the parts of the locking mechanism 3 during flaring. Embodiment II
[0020] Please refer to Figure 1 - Figure 6 As shown in, a pipe end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes, the locking mechanism 3 includes a mounting base 31, which is slidably connected above the base 1. The outside of the mounting base 31 is fixedly connected to the support rod 28. A cylinder 32 is fixedly connected to the middle of the mounting base 31. A worm gear 33 is rotatably connected to the outer wall of the cylinder 32. A synchronous rod 34 is fixedly connected to one side of the worm gear 33. The end of the synchronous rod 34 far from the worm gear 33 is fixedly connected to a ring 35, and the ring 35 is rotatably connected to the outer wall of the cylinder 32. A worm 39 is rotatably connected above the mounting base 31. The outer wall of the worm 39 is engaged with the upper part of the worm gear 33. One end of the worm 39 is fixedly connected to a handle 391. The outer sides of the cylinder 32, the worm gear 33 and the ring 35 are all rotatably connected to a first rotating block 36 and a second rotating block 37. The length of the second rotating block 37 is greater than that of the first rotating block 36. A pressing rod 38 is fixedly connected to the inside of a group of the first rotating blocks 36 and the second rotating blocks 37. The outer wall of the pressing rod 38 is slidably connected to the inside of the other group of corresponding first rotating blocks 36 or second rotating blocks 37.
[0021] The specific implementation process of this embodiment is as follows: Limit one end of the seamless steel pipe. After inserting one end of the seamless steel pipe into the interior of the cylinder 32, shake the handle 391. When the handle 391 is shaken, the worm 39 will rotate. Under the transmission between the worm gear 33 and the worm 39, the worm gear 33 will rotate. When the worm gear 33 rotates, the ring 35 will rotate simultaneously under the action of the synchronous rod 34. During the rotation of the worm gear 33 and the ring 35, the extrusion rod 38 will slide relative to the first rotating block 36 and the second rotating block 37, reducing the distance between the extrusion rods 38 to achieve the purpose of limiting the outer wall of the seamless steel pipe. In addition, under the action of the support rod 28, when the sliding plate 22 slides relative to the slide bar 21, the mounting seat 31 will slide above the base 1 following the sliding plate 22 on one side of it.
[0022] Usage method and working principle of the present invention: When flaring a seamless steel pipe, the second motor 27 can be started first according to the length of the seamless steel pipe. After the second motor 27 is started, it will drive the screw rod 26 to rotate. When the screw rod 26 rotates, under the transmission of the screw rod 26 and the connecting block 24, since the sliding plate 22 located in the middle is fixedly connected above the base 1 and the five sliding plates 22 are driven by the connecting rod 25, the distance between the five sliding plates 22 will change, so that the distance between the five conveying rollers 23 will change. After the distance between the conveying rollers 23 is adjusted, one end of the seamless steel pipe on the conveying rollers 23 can be attached to one side of the positioning block 12, and the other end of the seamless steel pipe can be passed through the inside of the locking mechanism 3. If one end of the seamless steel pipe is limited, after inserting one end of the seamless steel pipe into the inside of the cylinder 32, shake the handle 391. After the handle 391 is shaken, the worm 39 will rotate. Under the transmission between the worm gear 33 and the worm 39, the worm gear 33 will rotate. When the worm gear 33 rotates, the ring 35 will rotate simultaneously under the action of the synchronous rod 34. During the rotation of the worm gear 33 and the ring 35, the extrusion rod 38 will slide relative to the first rotating block 36 and the second rotating block 37, so that the distance between the extrusion rods 38 is reduced, thus achieving the purpose of limiting the outer wall of the seamless steel pipe. In addition, under the action of the support rod 28, when the sliding plate 22 slides relative to the slide bar 21, the mounting seat 31 will slide above the base 1 following the sliding plate 22 on one side. Subsequently, start the first motor 17 according to the size of the flare required. After the first motor 17 is started, since the first gear 15 meshes with the second gear 18, the first motor 17 will drive the first gear 15 to rotate after being started, and rotate the center of the plug 16 to be inserted to be on the same straight line as the center of the seamless steel pipe. After the above process is completed, the staff can start the second hydraulic cylinder 13. When the output end of the second hydraulic cylinder 13 extends, it will insert the plug 16 concentric with the seamless steel pipe into the inside of the seamless steel pipe, thus completing the flaring of the seamless steel pipe. Through the above process, plugs 16 of different sizes can be replaced according to different expansion amounts. The entire first gear 15 is axially driven by the second hydraulic cylinder 13 to flare the seamless steel pipe. This flaring device can meet the flaring requirements of different specifications, ensure the wall thickness uniformity of the flared steel pipe, and improve the flaring efficiency. In addition, this device is more convenient when flaring seamless steel pipes of different lengths, avoiding the problem that the locking mechanism 3 is relatively close to the end of the seamless steel pipe due to the short length of the seamless steel pipe, resulting in the plug 16 squeezing and damaging the locking mechanism 3 during flaring.
[0023] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements fall within the scope of the present invention claimed.
Claims
1. A tube end flaring device for the production of large-diameter ultra-thin-walled seamless steel pipes, including a base (1), characterized in that: Above the base (1), a first hydraulic cylinder (11) is fixedly connected. The output end of the first hydraulic cylinder (11) is fixedly connected with a positioning block (12). Above the base (1), a second hydraulic cylinder (13) is fixedly connected. The output end of the second hydraulic cylinder (13) is fixedly connected with a circular plate (14). Outside the circular plate (14), a first motor (17) is fixedly connected. The output end of the first motor (17) is fixedly connected with a second gear (18). On one side of the circular plate (14), a first gear (15) is fixedly connected. Above the first gear (15), it meshes with the second gear (18). On one side of the first gear (15), a top head (16) is threadedly connected. The sizes of the three top heads (16) increase in the clockwise direction in sequence, which can meet the flaring requirements of steel pipes with different specifications. Above the base (1), a telescopic mechanism (2) is provided. Above the base (1), a locking mechanism (3) is provided; The telescopic mechanism (2) is used to adapt to seamless steel pipes of different lengths; The locking mechanism (3) is used to limit the seamless steel pipe.
2. The tube end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes according to claim 1, characterized in that: The telescopic mechanism (2) includes a slide bar (21). The slide bar (21) is fixedly connected to the middle part above the base (1). Above the slide bar (21), a sliding plate (22) is slidably connected. The five sliding plates (22) are equidistantly distributed. The sliding plate (22) in the middle position is fixedly connected to the base (1).
3. The pipe end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes according to claim 2, wherein: Above the five sliding plates (22), connecting rods (25) are rotatably connected. Below one of the sliding plates (22), a connecting block (24) is fixedly connected. The connecting block (24) is slidably connected to the upper part of the base (1).
4. The tube end flaring device for the production of large-caliber ultra-thin-walled seamless steel pipes according to claim 3, wherein: Below the base (1), a screw rod (26) is rotatably connected. The outer wall of the screw rod (26) is threadedly connected to the connecting block (24). Below the base (1), a second motor (27) is fixedly connected. The output end of the second motor (27) is fixedly connected to one end of the screw rod (26). Above the five sliding plates (22), conveying rollers (23) are rotatably connected. On one side of one of the sliding plates (22), a support rod (28) is fixedly connected.
5. The tube end flaring device for the production of large-diameter ultra-thin-walled seamless steel pipes according to claim 1, characterized in that: The locking mechanism (3) includes a mounting seat (31). The mounting seat (31) is slidably connected to the upper part of the base (1). The outside of the mounting seat (31) is fixedly connected to the support rod (28).
6. The tube end flaring device for the production of large-caliber ultra-thin-wall seamless steel pipes according to claim 5, characterized in that: In the middle of the mounting seat (31), a cylinder (32) is fixedly connected. The outer wall of the cylinder (32) is rotatably connected to a worm gear (33). On one side of the worm gear (33), a synchronous rod (34) is fixedly connected. The end of the synchronous rod (34) far from the worm gear (33) is fixedly connected to a ring (35). The ring (35) is rotatably connected to the outer wall of the cylinder (32).
7. The tube end flaring device for the production of large-diameter ultra-thin-wall seamless steel pipes according to claim 6, characterized in that: Above the mounting seat (31), a worm (39) is rotatably connected. The outer wall of the worm (39) meshes with the upper part of the worm gear (33). One end of the worm (39) is fixedly connected to a handle (391).
8. The pipe end flaring device for the production of large-diameter ultra-thin-walled seamless steel pipes according to claim 7, characterized in that: One - way rotating blocks (36) and two - way rotating blocks (37) are rotatably connected to the outer sides of the cylinder (32), the worm gear (33), and the circular ring (35). The length of the two - way rotating block (37) is greater than that of the one - way rotating block (36). Inside each of a set of the one - way rotating blocks (36) and two - way rotating blocks (37), there is a fixed connection with a pressing rod (38). The outer wall of the pressing rod (38) is slidably connected to the inside of the other set of corresponding one - way rotating blocks (36) or two - way rotating blocks (37).