Pipe stamping flaring forming device and method
By designing an automated pipe stamping and flaring molding device, the problems of manual loading in the prior art are solved, and efficient, accurate and safe automatic flaring operation of the pipe is achieved.
Patent Information
- Application Number
- CN202411920507.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-03-04
AI Technical Summary
In the prior art, the pipe flaring process requires manual loading, which takes a long time, affects production efficiency, and poses a risk of mechanical injury.
A pipe stamping and flaring forming device is designed, adopting an automatic loading and unloading structure, and precisely controls the movement of components such as push plates and buffer plates through transmission mechanisms such as bidirectional threaded rods, connecting arms, and connecting seats to realize automatic loading, flaring and unloading of pipes.
It improves production efficiency, reduces the risk of manual operation, realizes automated operation of pipes, and improves the accuracy and stability of flaring.
Smart Images
Figure CN119549596A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of pipe expansion, and more specifically to a pipe stamping and expanding forming device and method. Background Art
[0002] Oil casing, especially petroleum casing, is a steel pipe used to support the wall of oil and gas wells to ensure the smooth progress of the drilling process and the normal operation of the entire oil well after completion. After the initial forming of the oil casing pipe, in order to meet the connection requirements between the various components in the pipeline system, one end of the pipe often needs to be expanded. The port diameter of the expanded metal pipe is appropriately increased, which facilitates the docking with other pipes; this docking method is not only tight and firm, but also can withstand greater pressure, ensuring the stable operation of the pipeline system in the complex environment of the oil well.
[0003] In the existing technology, manual loading is required during the pipe expansion process, and workers manually place the pipes on the expanding device. This process is time-consuming, especially when processing a large number of pipes, which affects production efficiency. Manual operation involves direct contact with mechanical equipment, and workers face the risk of mechanical injury. Summary of the invention
[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a tube stamping and expanding forming device and method, which can improve production efficiency, and the automatic loading and unloading structure can improve the safety of the production process.
[0005] The present invention proposes a pipe stamping and expanding forming device, comprising an operating table, a material guide plate is fixedly connected to the inner wall of the operating table, a mounting groove is provided on the top of the material guide plate, two first limit plates are fixedly connected to the top of the material guide plate, a first sliding hole is provided on the top of the operating table, a support table is fixedly connected to the top of the operating table, a first inclined surface is provided on the top of the support table, a second sliding hole is provided on the top of the support table, the second sliding hole is located on the first inclined surface, a bracket is provided on the top of the support table, and the bracket is located at the lower end of the first inclined surface, the two first limit plates are respectively fixedly connected to the support table, a push plate is slidably connected to the inner wall of the mounting groove, a second inclined surface is provided on the top of the push plate, a buffer plate is slidably connected to the inner wall of the second sliding hole, a third inclined surface is provided on the top of the buffer plate, and the bottom of the buffer plate passes through the first sliding hole and is slidably connected to it.
[0006] Preferably, a first support plate is fixedly connected to the bottom of the operating table, a bottom plate is fixedly connected to the outer wall of the first support plate, a second support plate is fixedly connected to the side wall of the bottom plate, and a top of the second support plate is fixedly connected to a material guide plate.
[0007] Preferably, the inner wall of the first support plate is rotatably connected to two bidirectional threaded rods, the ends of the bidirectional threaded rods are rotatably connected to the second support plate respectively, and the outer wall of the first support plate is fixedly connected to the base.
[0008] Preferably, a motor is fixedly connected to the bottom of the machine base, the output end of the motor is fixedly connected to one of the bidirectional threaded rods, the ends of the bidirectional threaded rods are fixedly connected to synchronous wheels, and the two synchronous wheels are connected via a synchronous belt transmission.
[0009] Preferably, the outer walls of the bidirectional threaded rod are threadedly connected to two hinge seats, the inner walls of the hinge seats are rotatably connected to connecting arms, the ends of the two connecting arms are rotatably connected to connecting seats, the top of the connecting seat is fixedly connected to a connecting plate, and the top of the connecting plate is fixedly connected to the push plate and the buffer plate.
[0010] Preferably, two fourth sliding holes are provided on the inner wall of the bracket, two third sliding holes are provided on the top of the operating table, the fourth sliding holes extend to the bottom of the bracket, the inner walls of the fourth sliding holes are slidably connected with a support plate, the bottom of the support plate passes through the fourth sliding holes and is slidably connected thereto, and the top of the support plate is provided with a fourth inclined surface.
[0011] Preferably, a sixth inclined surface is provided on the top of the support platform, a blanking plate is fixedly connected to the outer wall of the sixth inclined surface, two second limit plates are fixedly connected to the top of the blanking plate, and a fifth inclined surface is provided on the top of the support platform, the fifth inclined surface is connected to the top surface of the blanking plate and has the same inclination.
[0012] Preferably, the output end of the other pressurized power component is fixedly connected to a connecting shaft, a conical sleeve is provided on the outer wall of the connecting shaft, a retaining ring is fixedly connected to the thicker end of the conical sleeve, the ends of the conical sleeve and the retaining ring are fixedly connected to the connecting sleeve, the inner wall of the connecting sleeve is slidably connected to a fixing bolt, and the end of the fixing bolt passes through the connecting shaft and is threadedly connected to it.
[0013] A method for using a pipe punching and expanding forming device comprises the following steps:
[0014] S1. Stack the pipes on the top of the guide plate in sequence. The motor drives the bidirectional threaded rod to rotate through the synchronous wheel. The hinge seat moves spirally along the outer wall of the bidirectional threaded rod. The connecting seat is pushed to move through the connecting arm. The connecting plate is pushed upward through the connecting seat. The connecting plate pushes the push plate and the buffer plate upward respectively. The pipe at the lower end of the guide plate is pushed upward through the push plate. When the second inclined surface on the top of the push plate is connected to the first inclined surface, the pipe rolls downward along the first inclined surface under the action of the second inclined surface.
[0015] S2, when the connecting plate moves upward, it pushes the buffer plate to extend above the support platform, thereby blocking the pipe rolling downward along the first inclined surface and reducing the speed of the pipe rolling downward;
[0016] S3, the motor drives the bidirectional threaded rod to rotate in the opposite direction, and the connecting plate drives the push plate and the buffer plate to move downward respectively. When the second inclined surface at the top of the push plate is connected and parallel to the inclined surface at the top of the guide plate, the pipe rolls to the top of the second inclined surface, and the buffer plate slides downward to break away from the obstruction of the pipe. At this time, the pipe can roll stably along the first inclined surface into the bracket;
[0017] S4, one of the pressurizing power parts pushes the expansion cone to move, and the other pressurizing power part pushes the cone sleeve to move through the connecting shaft, and the expansion cone and the cone sleeve are used to pressurize the two ends of the pipe respectively, thereby expanding the pipe mouth;
[0018] S5. Remove the fixing bolts and swap the two ends of the cone sleeve. During the expansion process, use the retaining ring to block one end of the pipe. At this time, another pressurized power part pushes the expansion cone to expand one end of the pipe.
[0019] S6. When the connecting plate moves upward, it pushes the support plate upward, lifts the pipe through the top of the support plate, and the pipe rolls along the fourth and fifth inclined surfaces to the unloading plate, and rolls downward along the unloading plate to realize automatic unloading.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] 1. The present invention realizes the automation of a series of operations such as pipe loading, expanding, and unloading, without direct human participation, thereby improving production efficiency. At the same time, the automatic loading and unloading structure can improve the safety of the production process.
[0022] 2. In the present invention, through the transmission mechanism such as the bidirectional threaded rod, the connecting arm, the connecting seat, etc., the moving position and speed of the push plate, the buffer plate and other components can be accurately controlled to ensure the accurate positioning of the pipe during the expansion process, thereby improving the precision and stability of the expansion.
[0023] 3. In the present invention, the design of the buffer plate can play a buffering role during the rolling process of the pipe, reduce the speed of the pipe when rolling downward, avoid damage to the pipe due to impact, and at the same time ensure that the pipe can be stably rolled into the bracket, providing convenience for subsequent expansion operations.
[0024] 4. In the present invention, the expansion cone and the cone sleeve are pushed by the pressurized power member to pressurize the two ends of the pipe, thereby realizing a fast and efficient expansion operation. At the same time, the two ends of the cone sleeve can be interchanged with each other to facilitate the expansion of pipes with different ports, thereby improving the flexibility and applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0027] Figure 2 It is a schematic diagram of the installation structure of the material guide plate of the present invention;
[0028] Figure 3 It is a schematic diagram of the overall structure of the support platform of the present invention;
[0029] Figure 4 It is a schematic diagram of the installation structure of the support platform of the present invention;
[0030] Figure 5 It is a schematic diagram of the installation structure of the connecting seat of the present invention;
[0031] Figure 6 It is a schematic diagram of the installation structure of the cone sleeve of the present invention.
[0032] Explanation of the reference numerals in the figure: 1, operating table; 2, guide plate; 3, mounting groove; 4, first sliding hole; 5, support platform; 6, bracket; 7, second sliding hole; 8, first inclined surface; 9, first limit plate; 10, push plate; 11, second inclined surface; 12, buffer plate; 13, third inclined surface; 14, connecting plate; 15, third sliding hole; 16, fourth sliding hole; 17, support plate; 18, fourth inclined surface; 19, fifth inclined surface; 20, sixth inclined surface ; 21. blanking plate; 22. second limit plate; 23. first support plate; 24. bottom plate; 25. second support plate; 26. bidirectional threaded rod; 27. machine base; 28. motor; 29. synchronous wheel; 30. hinge seat; 31. connecting arm; 32. connecting seat; 33. support seat; 34. pressurized power part; 35. connecting shaft; 36. flaring cone; 37. cone sleeve; 38. retaining ring; 39. connecting sleeve; 40. fixing bolt. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the implementation mode of the present application clearer, the technical solution in the implementation mode of the present application will be clearly and completely described in combination with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application. The specific implementation modes of the present invention are described in detail in combination with the drawings in the specification.
[0034] like Figure 1-Figure 4 As shown, a pipe stamping and expanding forming device and method include an operating table 1, a guide plate 2 is fixedly connected to the inner wall of the operating table 1, a mounting groove 3 is provided on the top of the guide plate 2, two first limit plates 9 are fixedly connected to the top of the guide plate 2 on both sides, a first sliding hole 4 is provided on the top of the operating table 1, a support 5 is fixedly connected to the top of the operating table 1, a first inclined surface 8 is provided on the top of the support 5, a second sliding hole 7 is provided on the top of the support 5, the top of the second sliding hole 7 is located on the first inclined surface 8, a bracket 6 is provided on the top of the support 5, the bracket 6 is located at the lower end of the first inclined surface 8, and the two first limit plates 9 are fixedly connected to the top of the operating table 1. The plates 9 are fixedly connected to the brackets 5 respectively, and a push plate 10 is slidably connected to the inner wall of the mounting groove 3, a second inclined surface 11 is provided on the top of the push plate 10, a buffer plate 12 is slidably connected to the inner wall of the second sliding hole 7, a third inclined surface 13 is provided on the top of the buffer plate 12, and the bottom of the buffer plate 12 passes through the first sliding hole 4 and is slidably connected thereto; the design of the buffer plate 12 can play a buffering role in the rolling process of the pipe, reduce the speed of the pipe when rolling downward, avoid damage to the pipe due to impact, and at the same time ensure that the pipe can stably roll into the bracket 6, providing convenience for subsequent flaring operations.
[0035] like Figure 5 As shown, a first support plate 23 is fixedly connected to the bottom of the operating table 1, a bottom plate 24 is fixedly connected to the outer wall of the first support plate 23, a second support plate 25 is fixedly connected to the side wall of the bottom plate 24, and the top of the second support plate 25 is fixedly connected to the material guide plate 2.
[0036] like Figure 5 As shown, the inner wall of the first support plate 23 is rotatably connected to two bidirectional threaded rods 26 , the ends of the bidirectional threaded rods 26 are rotatably connected to the second support plate 25 , and the outer wall of the first support plate 23 is fixedly connected to a base 27 .
[0037] like Figure 5 As shown, a motor 28 is fixedly connected to the bottom of the machine base 27, and the output end of the motor 28 is fixedly connected to one of the two-way threaded rods 26. Both ends of the two-way threaded rods 26 are fixedly connected to synchronous wheels 29, and the two synchronous wheels 29 are connected through a synchronous belt transmission.
[0038] like Figure 5As shown, the outer walls of the bidirectional threaded rod 26 are threadedly connected to two hinge seats 30, the inner walls of the hinge seats 30 are rotatably connected to connecting arms 31, the ends of the two connecting arms 31 are rotatably connected to connecting seats 32, the top of the connecting seat 32 is fixedly connected to a connecting plate 14, and the top of the connecting plate 14 is fixedly connected to the push plate 10 and the buffer plate 12.
[0039] like Figure 4 As shown, two fourth sliding holes 16 are provided on the inner wall of the bracket 6, two third sliding holes 15 are provided on the top of the operating table 1, the fourth sliding hole 16 extends to the bottom of the support platform 5, the inner walls of the fourth sliding holes 16 are slidably connected with a support plate 17, the bottom of the support plate 17 passes through the fourth sliding hole 16 and is slidably connected thereto, and a fourth inclined surface 18 is provided on the top of the support plate 17; the upward movement of the connecting plate 14 is suitable for pushing the support plate 17 to move upward.
[0040] like Figure 1 and Figure 3 As shown, a sixth inclined surface 20 is provided on the top of the support platform 5, a blanking plate 21 is fixedly connected to the outer wall of the sixth inclined surface 20, two second limit plates 22 are fixedly connected to both sides of the top of the blanking plate 21, and a fifth inclined surface 19 is provided on the top of the support platform 5, the fifth inclined surface 19 is connected to the top surface of the blanking plate 21 and has the same inclination.
[0041] like Figure 1 and Figure 6 As shown, two pressurizing power members 34 are installed on the operating table 1, and a flared cone 36 is installed on the output shaft of one of the pressurizing power members 34, and a connecting shaft 35 is fixedly connected to the output end of the other pressurizing power member 34. A cone sleeve 37 is sleeved on the outer wall of the connecting shaft 35, and a retaining ring 38 is fixedly connected to the thicker end of the cone sleeve 37. The ends of the cone sleeve 37 and the retaining ring 38 are fixedly connected to a connecting sleeve 39, and the inner wall of the connecting sleeve 39 is slidably connected to a fixing bolt 40, and the end of the fixing bolt 40 passes through the connecting shaft 35 and is threadedly connected thereto. The pressurizing power component 34 pushes the expanding cone 36 to move, and the other pressurizing power component 34 pushes the cone sleeve 37 to move through the connecting shaft 35. The expanding cone 36 and the cone sleeve 37 are respectively pressurized on both ends of the pipe to expand the pipe mouth. The two ends of the cone sleeve 37 are swapped with each other, and one end of the pipe is blocked by the retaining ring 38. At this time, the other pressurizing power component 34 pushes the expanding cone 36 to expand one end of the pipe. This design can facilitate the expansion processing of one or both ends at the same time according to the installation requirements of the pipe.
[0042] In this embodiment, the pressurizing power member 34 may be a hydraulic rod.
[0043] When in use, pipes are stacked on the top of the guide plate 2 in sequence, the motor 28 drives the bidirectional threaded rod 26 to rotate through the synchronous wheel 29, the hinge seat 30 moves spirally along the outer wall of the bidirectional threaded rod 26, the connecting seat 32 is pushed to move through the connecting arm 31, the connecting plate 14 is pushed to move upward through the connecting seat 32, the connecting plate 14 pushes the push plate 10 and the buffer plate 12 to move upward respectively, and the pipes at the lower end of the guide plate 2 are pushed upward through the push plate 10, when the second inclined surface 11 at the top of the push plate 10 is connected to the first inclined surface 8, at this time, under the action of the second inclined surface 11, the pipes roll downward along the first inclined surface 8;
[0044] When the connecting plate 14 moves upward, it pushes the buffer plate 12 to extend above the support platform 5, thereby blocking the pipe rolling downward along the first inclined surface 8 and reducing the speed of the pipe rolling downward;
[0045] The motor 28 drives the bidirectional threaded rod 26 to rotate in the opposite direction. At this time, the connecting plate 14 drives the push plate 10 and the buffer plate 12 to move downward respectively. When the second inclined surface 11 at the top of the push plate 10 is connected and parallel to the top inclined surface of the guide plate 2, the pipe rolls to the top of the second inclined surface 11. When the buffer plate 12 slides downward, it is free from the obstruction of the pipe. At this time, the pipe can roll stably along the first inclined surface 8 into the bracket 6;
[0046] One of the pressurizing power members 34 pushes the expanding cone 36 to move, and the other pressurizing power member 34 pushes the cone sleeve 37 to move through the connecting shaft 35, and the expanding cone 36 and the cone sleeve 37 are used to pressurize the two ends of the pipe respectively, thereby expanding the pipe opening;
[0047] By removing the fixing bolt 40, the two ends of the cone sleeve 37 are interchanged with each other. During the expansion process, the retaining ring 38 blocks one end of the pipe. At this time, the other pressurizing power member 34 pushes the expansion cone 36 to expand one end of the pipe.
[0048] When the connecting plate 14 moves upward, it pushes the support plate 17 upward, lifts the pipe through the top of the support plate 17, and the pipe rolls along the fourth inclined surface 18 and the fifth inclined surface 19 to the unloading plate 21, and rolls downward along the unloading plate 21 to realize automatic unloading.
[0049] The above shows and describes 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. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A tube punching and expanding forming device, comprising an operating table (1), characterized in that: The inner wall of the operating table (1) is fixedly connected to a material guide plate (2), the top of the material guide plate (2) is provided with a mounting groove (3), the top of the material guide plate (2) is fixedly connected to two first limit plates (9), the top of the operating table (1) is provided with a first sliding hole (4), the top of the operating table (1) is fixedly connected to a support platform (5), the top of the support platform (5) is provided with a first inclined surface (8), the top of the support platform (5) is provided with a second sliding hole (7), the second sliding hole (7) is located on the first inclined surface (8), the support platform ( 5) A bracket (6) is provided on the top, the bracket (6) is located at the lower end of the first inclined surface (8), the two first limit plates (9) are respectively fixedly connected to the support (5), the inner wall of the mounting groove (3) is slidably connected with a push plate (10), the top of the push plate (10) is provided with a second inclined surface (11), the inner wall of the second sliding hole (7) is slidably connected with a buffer plate (12), the top of the buffer plate (12) is provided with a third inclined surface (13), and the bottom of the buffer plate (12) passes through the first sliding hole (4) and is slidably connected thereto.
2. The tube punching and expanding forming device according to claim 1, characterized in that: The bottom of the operating table (1) is fixedly connected to a first support plate (23); the outer wall of the first support plate (23) is fixedly connected to a bottom plate (24); the side wall of the bottom plate (24) is fixedly connected to a second support plate (25); and the top of the second support plate (25) is fixedly connected to the material guide plate (2).
3. The tube punching and expanding forming device according to claim 2, characterized in that: The inner wall of the first support plate (23) is rotatably connected to two bidirectional threaded rods (26), the ends of the bidirectional threaded rods (26) are respectively rotatably connected to the second support plate (25), and the outer wall of the first support plate (23) is fixedly connected to a base (27).
4. The tube punching and expanding forming device according to claim 3, characterized in that: A motor (28) is fixedly connected to the bottom of the machine base (27); an output end of the motor (28) is fixedly connected to one of the bidirectional threaded rods (26); both ends of the bidirectional threaded rods (26) are fixedly connected to synchronous wheels (29); and the two synchronous wheels (29) are connected via a synchronous belt transmission.
5. The tube punching and expanding forming device according to claim 4, characterized in that: The outer wall of the bidirectional threaded rod (26) is threadedly connected to two hinge seats (30), the inner wall of the hinge seat (30) is rotatably connected to a connecting arm (31), the ends of the two connecting arms (31) are rotatably connected to a connecting seat (32), the top of the connecting seat (32) is fixedly connected to a connecting plate (14), and the top of the connecting plate (14) is fixedly connected to the push plate (10) and the buffer plate (12).
6. The tube punching and expanding forming device according to claim 5, characterized in that: The inner wall of the bracket (6) is provided with two fourth sliding holes (16), the top of the operating table (1) is provided with two third sliding holes (15), the fourth sliding holes (16) extend to the bottom of the support table (5), the inner walls of the fourth sliding holes (16) are slidably connected with a support plate (17), the bottom of the support plate (17) passes through the fourth sliding holes (16) and is slidably connected thereto, and the top of the support plate (17) is provided with a fourth inclined surface (18).
7. The tube punching and expanding forming device according to claim 6, characterized in that: The top of the support platform (5) is provided with a sixth inclined surface (20), the outer wall of the sixth inclined surface (20) is fixedly connected with a blanking plate (21), the top of the blanking plate (21) is fixedly connected with two second limit plates (22), and the top of the support platform (5) is provided with a fifth inclined surface (19), the fifth inclined surface (19) is connected with the top surface of the blanking plate (21) and has the same inclination.
8. The tube punching and expanding forming device according to claim 7, characterized in that: Two support seats (33) are fixedly connected to the top of the operating table (1), and the tops of the support seats (33) are both fixedly connected to pressurizing power members (34), wherein an output end of one of the pressurizing power members (34) is fixedly connected to a flaring cone (36).
9. The tube punching and expanding forming device according to claim 8, characterized in that: The output end of the other pressurizing power member (34) is fixedly connected to a connecting shaft (35), the outer wall of the connecting shaft (35) is provided with a cone sleeve (37), the thicker end of the cone sleeve (37) is fixedly connected to a retaining ring (38), the ends of the cone sleeve (37) and the retaining ring (38) are fixedly connected to a connecting sleeve (39), the inner wall of the connecting sleeve (39) is slidably connected to a fixing bolt (40), and the end of the fixing bolt (40) passes through the connecting shaft (35) and is threadedly connected thereto.
10. A method for using a tube punching and expanding forming device, applicable to the tube punching and expanding forming device according to claim 9, characterized in that: The following steps are involved: S1. The pipes are stacked on the top of the guide plate (2) in sequence. The motor (28) drives the bidirectional threaded rod (26) to rotate through the synchronous wheel (29). The hinge seat (30) moves spirally along the outer wall of the bidirectional threaded rod (26). The connecting seat (32) is pushed to move through the connecting arm (31). The connecting plate (14) is pushed to move upward through the connecting seat (32). The connecting plate (14) pushes the push plate (10) and the buffer plate (12) to move upward respectively. The pipes at the lower end of the guide plate (2) are pushed upward through the push plate (10). When the second inclined surface (11) at the top of the push plate (10) is connected to the first inclined surface (8), at this time, under the action of the second inclined surface (11), the pipes roll downward along the first inclined surface (8); S2, when the connecting plate (14) moves upward, it pushes the buffer plate (12) to extend above the support platform (5), thereby blocking the pipe rolling downward along the first inclined surface (8) and reducing the speed of the pipe rolling downward; S3, the motor (28) drives the bidirectional threaded rod (26) to rotate in the opposite direction, and the connecting plate (14) drives the push plate (10) and the buffer plate (12) to move downward respectively. When the second inclined surface (11) at the top of the push plate (10) is connected and parallel to the top inclined surface of the guide plate (2), the pipe rolls to the top of the second inclined surface (11), and the buffer plate (12) slides downward to break away from the obstruction of the pipe. At this time, the pipe can roll stably along the first inclined surface (8) into the bracket (6); S4, one of the pressurizing power members (34) pushes the expanding cone (36) to move, and the other pressurizing power member (34) pushes the cone sleeve (37) to move via the connecting shaft (35), and the expanding cone (36) and the cone sleeve (37) are used to pressurize the two ends of the pipe respectively, thereby expanding the pipe opening; S5. The fixing bolts (40) are removed and the two ends of the cone sleeve (37) are swapped with each other. During the expansion process, one end of the pipe is blocked by the retaining ring (38). At this time, another pressurizing power member (34) pushes the expansion cone (36) to expand one end of the pipe. S6. When the connecting plate (14) moves upward, it pushes the supporting plate (17) to move upward, and the pipe is lifted up by the top of the supporting plate (17). The pipe rolls along the fourth inclined surface (18) and the fifth inclined surface (19) to the unloading plate (21), and then rolls downward along the unloading plate (21) to realize automatic unloading.