Pipe reducing device

Abstract

The application relates to a pipeline reducing device, belonging to the field of pipeline processing, which comprises a rack, a mounting seat and a moving seat arranged on the rack, the moving seat and the rack being in sliding connection, a first control assembly for controlling the movement of the moving seat being arranged on the mounting seat, a supporting seat being arranged on the rack, a three-jaw chuck being oppositely rotatable on the supporting seat, a second control assembly for controlling the rotation of the three-jaw chuck being arranged on the mounting seat, a steel pipe sequentially penetrating through the three-jaw chuck, the supporting seat, the mounting seat and the moving seat, a reducing wheel oppositely sliding on the rack, a sliding assembly for controlling the sliding of the reducing wheel being arranged on the rack, a reducing groove being arranged on the reducing wheel, and the groove bottom of the reducing groove abutting against one end of the steel pipe penetrating through the moving seat. In the application, the sliding assembly is used to move the reducing wheel, the reducing wheel abutting against one end of the steel pipe extending out of the moving seat when the reducing wheel moves, so that the reducing of the steel pipe is realized, the structure is simple, the operation is simple, and the reducing efficiency of the steel pipe is improved.

Description

Technical Field

[0001] This application relates to the field of pipe processing, and in particular to a pipe diameter reducing device. Background Technology

[0002] In piping systems, the diameter of steel pipes is often changed to adapt to different usage requirements. Currently, common methods for changing the diameter of steel pipes include cold drawing and hot rolling. Common steel pipe diameter changing devices mainly use the principles of mechanical pressing or thermal expansion and contraction to change the diameter. However, in actual use, these devices often have problems such as complex structure, inconvenient operation, and low diameter changing efficiency. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a pipe diameter reducing device.

[0004] The pipe diameter reducing device provided in this application adopts the following technical solution: A pipe diameter reducing device includes a frame, a mounting seat and a movable seat on the frame, the movable seat and the frame being slidably connected, a first control component on the mounting seat for controlling the movement of the movable seat, a support seat on the frame, a three-jaw chuck rotatably mounted on the support seat, a second control component on the mounting seat for controlling the rotation of the three-jaw chuck, a steel pipe passing sequentially through the three-jaw chuck, the support seat, the mounting seat and the movable seat, a reducing wheel sliding relative to each other on the frame, a sliding component on the frame for controlling the sliding of the reducing wheel, a reducing groove on the reducing wheel, the bottom of the reducing groove abutting against the end of the steel pipe passing through the movable seat.

[0005] By adopting the above technical solution, when the steel pipe needs to be changed in diameter, the operator can pass the steel pipe through the three-jaw chuck, support seat, mounting seat and moving seat in sequence. The end of the steel pipe that extends out of the moving seat is processed for diameter change. The diameter changing wheel is moved by the sliding component. When the diameter changing wheel moves, it abuts against the end of the steel pipe that extends out of the moving seat, thereby realizing the diameter change of the steel pipe. There is no need to change the diameter through mechanical pressing or the principle of thermal expansion and contraction. The structure is simple, the operation is simple and the efficiency of steel pipe diameter change is improved.

[0006] Preferably, the first control component includes a lead screw, a first sprocket, a first chain, and a first motor. The lead screw is rotatably connected to the mounting base and threadedly connected to the movable seat. The first sprocket is located inside the mounting base. There are two first sprockets, one of which is fixedly connected to the lead screw and the other is fixedly connected to the output shaft of the first motor. The first chain is wound around the two first sprockets, and the first motor is mounted on the mounting base.

[0007] By adopting the above technical solution, the operator can drive the first motor, so that the output shaft of the first motor drives the rotation of the first sprocket, and the first chain drives the rotation of the lead screw. The rotation of the lead screw drives the movement of the moving seat, and the movement of the moving seat drives the movement of the steel pipe, so that the steel pipe moves closer to the diameter-changing wheel, which facilitates the diameter-changing operation of the steel pipe.

[0008] Preferably, the second control component includes a rotating rod, a second sprocket, a second chain, a second motor, a third sprocket, and a third chain. The rotating rod is rotatably connected to the mounting base, the movable base, and the support base. The second sprocket is located inside the mounting base. There are two second sprockets, one of which is fixedly connected to the rotating rod, and the other is fixedly connected to the output shaft of the second motor. The second chain is wound around the two second sprockets. The second motor is mounted on the mounting base. The third sprocket is located inside the support base. There are two third sprockets, one of which is fixedly connected to the rotating rod, and the other is fixedly connected to the rotating shaft of the three-jaw chuck. The third chain is wound around the two third sprockets.

[0009] By adopting the above technical solution, the operator can drive the second motor, so that the output shaft of the second motor drives the rotation of the second sprocket, thereby driving the rotation of the rotating rod. The rotation of the rotating rod can drive the rotation of the third sprocket, and through the third chain, it can drive the rotation of the three-jaw chuck, which facilitates the rotation of the steel pipe when it is located in the three-jaw chuck.

[0010] Preferably, the sliding assembly includes a rotating frame, a transmission rod, a sliding frame, and a third motor. The rotating frame is rotatably connected to the machine frame. One end of the transmission rod is hinged to the rotating frame, and the other end is hinged to the sliding frame. The sliding frame is slidably connected to the machine frame. The variable diameter wheel is rotatably connected to the sliding frame. The third motor is mounted on the machine frame, and the output shaft of the third motor is fixedly connected to the rotating shaft of the rotating frame.

[0011] By adopting the above technical solution, the operator can drive the third motor. The output shaft of the third motor drives the rotation of the rotating frame. The rotation of the rotating frame can drive the movement of the transmission rod. The movement of the transmission rod can drive the movement of the sliding frame. The movement of the sliding frame can drive the movement of the diameter-changing wheel, which facilitates the diameter-changing wheel to apply force to the steel pipe and realize the diameter change of the steel pipe.

[0012] Preferably, a limiting cylinder is rotatably connected inside the movable seat, and the steel pipe passes through the limiting cylinder. The limiting cylinder is provided with a clamping assembly for clamping the steel pipe. The movable seat is provided with a first gear, a second gear, and a mating gear. The first gear is sleeved on a rotating rod, and a limiting block is fixedly connected inside the first gear. A limiting groove for the limiting block to be embedded is opened on the rotating rod. The second gear is fixedly connected to the limiting cylinder, and the mating gear is rotatably connected to the movable seat. The meshing of the first gear and the second gear both mesh with the mating gear.

[0013] By adopting the above technical solution, after the steel pipe passes through the limiting cylinder, it is clamped by the clamping assembly. Since the moving seat can slide, it can pull the steel pipe to change its diameter. After the clamping assembly clamps the steel pipe, the rotating rod drives the first gear to rotate. The first gear drives the mating gear to rotate, which in turn drives the second gear to rotate. The rotation of the second gear drives the limiting cylinder to rotate, which in turn drives the steel pipe to rotate, thus improving the diameter change effect of the steel pipe.

[0014] Preferably, the clamping assembly includes a first clamping rod and a second clamping rod, both of which are slidably connected to a limiting cylinder. The first clamping rod and the second clamping rod are close to or far from each other, and a clamping groove is formed between the first clamping rod and the second clamping rod. The first clamping rod and the second clamping rod are movable to abut against the steel pipe. The frame is provided with a first auxiliary component and a second auxiliary component. The first auxiliary component is used to control the first clamping rod and the second clamping rod to move closer to each other, and the second auxiliary component is used to control the first clamping rod and the second clamping rod to move away from each other.

[0015] By adopting the above technical solution, the operator can use the first auxiliary component to bring the first clamping rod and the second clamping rod closer together, so that the first clamping rod and the second clamping rod can clamp the steel pipe, which facilitates the movement of the moving seat to move the steel pipe and facilitates the steel pipe to be processed for diameter change; the operator can use the second auxiliary component to move the first clamping rod and the second clamping rod away from each other, release the clamping work of the first clamping rod and the second clamping rod, so that the moving seat can move to the initial position, clamp the steel pipe and pull the steel pipe.

[0016] Preferably, a limiting plate is fixedly connected to the limiting cylinder, and the limiting plate and the first clamping rod and the second clamping rod are all in contact.

[0017] By adopting the above technical solution, the limiting plate can limit the sliding of the first clamping rod and the second clamping plate, thereby improving the stability of the first clamping plate and the second clamping plate when they move.

[0018] Preferably, the first auxiliary component includes a contact rod, a first contact switch, a fourth motor, a first electric push rod, a first active rod, and a follower rod. The contact rod and the movable seat are fixedly connected. The first contact switch is mounted on the frame. The contact rod is movable to contact the first contact switch. The fourth motor is mounted on the frame. The first electric push rod and the output shaft of the fourth motor are fixedly connected. The first active rod and the piston rod of the first electric push rod are fixedly connected. The follower rod and the first clamping rod are threadedly connected to the second clamping rod. A first driving block is fixedly connected to the first active rod. A driving groove is formed on the follower rod, and the first driving block can be embedded in the driving groove.

[0019] By adopting the above technical solution, the moving seat can drive the contact rod to move when it moves. When the contact rod and the first contact switch come into contact, the first contact switch can send a command to the fourth motor and the first electric push rod. The piston rod of the first electric push rod can drive the first active rod to move, thereby driving the first drive block to move and embed the first drive block into the drive groove. Then the fourth motor drives the first electric push rod to rotate, thereby driving the follower rod to rotate. The movement of the follower rod can bring the first clamping rod and the second clamping rod closer to each other to clamp the steel pipe, which facilitates the steel pipe to change diameter.

[0020] Preferably, the second auxiliary component includes a second contact switch, a fifth motor, a second electric push rod, and a second drive rod. The second contact switch is located on one side of the first contact switch along the travel direction of the steel pipe. The second contact switch is mounted on the frame. The contact rod is movable to contact the second contact switch. The fifth motor is mounted on the frame. The output shaft of the second electric push rod and the fifth motor are fixedly connected. The piston rods of the second drive rod and the second electric push rod are fixedly connected. A second drive block is fixedly connected to the second drive rod. The second drive block can be embedded in the drive groove.

[0021] By adopting the above technical solution, when the movable seat moves, it can drive the contact rod to move. When the contact rod contacts the second contact switch, the second contact switch can issue a command to the fifth motor and the second electric push rod. The piston rod of the second electric push rod can drive the movement of the second active rod, thereby driving the movement of the second drive block, so that the second drive block is embedded in the drive groove. Then, the fifth motor drives the second electric push rod to rotate, thereby driving the rotation of the follower rod. The rotation of the follower rod can make the control first clamping rod and the second clamping rod move away from each other, releasing the clamping of the steel pipe, so that the movable seat can return to the initial position.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a reducing wheel and sliding assembly, when a steel pipe needs to be reduced in diameter, the operator can pass the steel pipe through a three-jaw chuck, support base, mounting base, and moving base in sequence. The end of the steel pipe extending from the moving base is then used for diameter reduction. The reducing wheel is moved by the sliding assembly, and when the reducing wheel moves, it abuts against the end of the steel pipe extending from the moving base, thereby realizing the diameter reduction of the steel pipe. This eliminates the need for diameter reduction through mechanical pressing or the principle of thermal expansion and contraction. The structure is simple, the operation is easy, and the efficiency of steel pipe diameter reduction is improved. 2. Through the setting of the limiting cylinder, clamping assembly, third gear and fourth gear, after the steel pipe passes through the limiting cylinder, it is clamped by the clamping assembly. Since the moving seat can slide, the moving seat can pull the steel pipe to change its diameter. After the clamping assembly clamps the steel pipe, the rotating rod drives the third gear to rotate, the third gear drives the fourth gear to rotate, and the rotation of the fourth gear drives the limiting cylinder to rotate, thereby driving the rotation of the steel pipe and improving the diameter change effect of the steel pipe. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the overall structure of the pipe diameter reducing device in the embodiments of this application.

[0024] Figure 2 This is a schematic diagram illustrating the overall structure of the first control component and the second control component in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram illustrating the internal structure of the movable seat in the embodiments of this application.

[0026] Figure 4 This is a structural schematic diagram illustrating the rotating rod and the movable seat in the embodiments of this application.

[0027] Figure 5 This is a schematic diagram illustrating the overall structure of the clamping component in the embodiments of this application.

[0028] Figure 6 This is a schematic diagram illustrating the overall structure of the first auxiliary component in the embodiments of this application.

[0029] Figure 7 This is a schematic diagram illustrating the overall structure of the second auxiliary component in the embodiments of this application.

[0030] Figure 8 This is a schematic diagram illustrating the overall structure of the sliding component in the embodiments of this application.

[0031] Figure 9 This is a schematic diagram illustrating the overall structure of the variable diameter wheel in the embodiments of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Mounting base; 12. Moving base; 121. Limiting cylinder; 1211. Limiting plate; 122. First gear; 1221. Limiting block; 123. Second gear; 124. Mating gear; 13. Support base; 131. Three-jaw chuck; 14. Variable diameter wheel; 141. Variable diameter groove; 2. First control component; 21. Lead screw; 22. First sprocket; 23. First chain; 24. First motor; 3. Second control component; 31. Rotating rod; 311. Limiting groove; 32. Second sprocket; 33. Second chain; 34. Second motor; 35. Third sprocket; 36. 4. Third chain; 5. Sliding assembly; 6. Rotating frame; 7. Transmission rod; 8. Sliding frame; 9. Third motor; 10. First auxiliary assembly; 11. Contact rod; 12. First contact switch; 13. Fourth motor; 14. First electric push rod; 15. First driving rod; 16. First drive block; 17. Follower rod; 18. Drive slot; 19. Second auxiliary assembly; 10. Second contact switch; 11. Fifth motor; 12. Second electric push rod; 13. Second driving rod; 14. Second drive block; 15. Clamping assembly; 16. First clamping rod; 17. Second clamping rod; 18. Clamping slot. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0034] This application discloses a pipe diameter reducing device, such as... Figure 1 As shown, the machine includes a frame 1, on which a support base 13, a mounting base 11, and a movable base 12 are provided. The support base 13 is located on one side of the mounting base 11, and the movable base 12 is located on the other side of the mounting base 11. The support base 13 and the mounting base 11 are both fixedly installed on the frame 1. The movable base 12 moves closer to or away from the mounting base 11. A steel pipe passes through the support base 13, the mounting base 11, and the movable base 12 in sequence.

[0035] like Figure 1 and 2As shown, the mounting base 11 is equipped with a first control component 2 for controlling the movement of the movable seat 12. The first control component 2 includes a lead screw 21, a first sprocket 22, a first chain 23, and a first motor 24. The lead screw 21 is rotatably connected to the mounting base 11 and threadedly connected to the movable seat 12. The first sprocket 22 is located inside the mounting base 11, and there are two first sprockets 22. One is coaxially and fixedly connected to the lead screw 21, and the other is coaxially and fixedly connected to the output shaft of the first motor 24. The first chain 23 is wound around the two first sprockets 22. The first motor 24 is mounted on the mounting base 11 and is a forward and reverse reversible motor. When it is necessary to control the movement of the movable seat 12, the operator can drive the first motor 24, so that the output shaft of the first motor 24 drives the first sprocket 22 to rotate, thereby driving the lead screw 21 to rotate. The rotation of the lead screw 21 can drive the movement of the movable seat 12, thereby controlling the movement of the movable seat 12 on the frame 1.

[0036] like Figure 1 and 2 As shown, a three-jaw chuck 131 is rotatably connected to the side of the support base 13 away from the mounting base 11. The rotation shaft of the three-jaw chuck 131 is hollow, allowing the steel pipe to pass through, and the three-jaw chuck 131 can clamp the steel pipe. The mounting base 11 is provided with a second control component 3 for controlling the rotation of the three-jaw chuck 131. The second control component 3 includes a rotating rod 31, a second sprocket 32, a second chain 33, a second motor 34, a third sprocket 35, and a third chain 36. The rotating rod 31 is rotatably connected to the mounting base 11, the moving base 12, and the support base 13. The second sprocket 32 ​​is located inside the mounting base 11. There are two second sprockets 32. One is coaxially fixedly connected to the rotating rod 31, and the other is coaxially fixedly connected to the output shaft of the second motor 34. The second chain 33 is wound around the two second sprockets 32. The second motor 34 is mounted on the mounting base 11. The third sprocket 35 is located inside the support base 13. There are two third sprockets 35. One third sprocket 35 is coaxially and fixedly connected to the rotating rod 31, and the other is coaxially and fixedly connected to the rotating shaft of the three-jaw chuck 131. The third chain 36 is wound around the two third sprockets 35. The operator can pass the steel pipe through the three-jaw chuck 131, and then pass the steel pipe through the support base 13, the mounting base 11, and the movable base 12. The three-jaw chuck 131 can clamp the steel pipe. When it is necessary to rotate the three-jaw chuck 131, the operator can drive the second motor 34, so that the output shaft of the second motor 34 drives the second sprocket 32 ​​to rotate, thereby driving the rotating rod 31 to rotate. The rotation of the rotating rod 31 drives the third sprocket 35 to rotate, thereby driving the three-jaw chuck 131 to rotate, which facilitates the rotation of the steel pipe by the three-jaw chuck 131.

[0037] like Figure 3 and 4As shown, a limiting cylinder 121 is rotatably connected inside the movable base 12, and a steel pipe passes through the limiting cylinder 121. The movable base 12 is equipped with a first gear 122, a second gear 123, and a mating gear 124. The first gear 122 is coaxially sleeved on the rotating rod 31, and a limiting block 1221 is fixedly connected inside the first gear 122. A limiting groove 311 is provided on the rotating rod 31 for the limiting block 1221 to be inserted into. The limiting groove 311 can limit the movement of the limiting block 1221, thereby limiting the movement of the first gear 122. The second gear 123 is coaxially fixedly connected to the limiting cylinder 121, and the mating gear 124 is rotatably connected to the movable base 12. Both the first gear 122 and the second gear 123 mesh with the mating gear 124. When the rotating rod 31 rotates, the angle of rotation on one side of the rotating rod 31 is 60°. The rotation of the rotating rod 31 can drive the rotation of the first gear 122, the first gear 122 can drive the rotation of the mating gear 124, the rotation of the mating gear 124 can drive the rotation of the second gear 123, and the rotation of the second gear 123 can drive the rotation of the limiting cylinder 121.

[0038] like Figure 1 and 5As shown, a clamping assembly 7 is provided at one end of the limiting cylinder 121 extending from the movable seat 12. The clamping assembly 7 includes a first clamping rod 71 and a second clamping rod 72. Both the first clamping rod 71 and the second clamping rod 72 are slidably connected to the limiting cylinder 121. The first clamping rod 71 and the second clamping rod 72 are close to or far from each other, and a clamping groove 73 is formed between the first clamping rod 71 and the second clamping rod 72. The first clamping rod 71 and the second clamping rod 72 can be moved to abut against the steel pipe. Two limiting plates 1211 are fixedly connected to the limiting cylinder 121, one located above the first clamping rod 71 and the second clamping rod 72, and the other located below the first clamping rod 71 and the second clamping rod 72. The two limiting plates 1211 can limit the movement of the first clamping rod 71 and the second clamping rod 72. The frame 1 is provided with a first auxiliary component 5 and a second auxiliary component 6. The first auxiliary component 5 is located on the side of the movable seat 12 facing the mounting seat 11, and the second auxiliary component 6 is located on the side of the movable seat 12 away from the mounting seat 11. The first auxiliary component 5 is used to control the first clamping rod 71 and the second clamping rod 72 to move closer to each other, and the second auxiliary component 6 is used to control the first clamping rod 71 and the second clamping rod 72 to move further apart from each other. When the steel pipe needs to be diameter-changed, the operator moves the movable seat 12 toward the mounting seat 11, then passes the steel pipe through the support seat 13 and the mounting seat 11 and inserts it into the movable seat 12. The first auxiliary component 5 clamps the steel pipe with the first clamping rod 71 and the second clamping rod 72. Then, the movable seat 12 is moved away from the mounting seat 11, and the steel pipe is pulled by the movable seat 12 to facilitate the diameter-changing operation. After the diameter-changing of the pulled-out steel pipe is completed, the first clamping rod 71 and the second clamping rod 72 are moved away from each other by the second auxiliary component 6 to release the clamp on the steel pipe, so that the movable seat 12 can return to the initial position and pull the steel pipe again.

[0039] like Figure 1 , 5As shown in Figure 6, the first auxiliary component 5 includes a contact rod 51, a first contact switch 52, a fourth motor 53, a first electric push rod 54, a first active rod 55, and a follower rod 56. The contact rod 51 is fixedly connected to the movable seat 12. The first contact switch 52 is mounted on the frame 1, and the contact rod 51 can move to contact the first contact switch 52. The fourth motor 53 is mounted on the frame 1, and there are two fourth motors 53. The first electric push rod 54 is fixedly connected to the output shaft of the fourth motor 53, and the first active rod 55 is fixedly connected to the piston rod of the first electric push rod 54. The follower rod 56 and the first clamping rod 71 are threadedly connected to the second clamping rod 72. There are two follower rods 56. A first driving block 551 is fixedly connected to the first active rod 55. A driving groove 561 is opened on the follower rod 56. The cross-section of the first driving block 551 is cross-shaped, and the first driving block 551 can be embedded in the driving groove 561. When the movable seat 12 is in the initial position, the operator passes the steel pipe through the movable seat 12, and the movable seat 12 contacts the first contact switch 52, thereby driving the first electric push rod 54. The first electric push rod 54 drives the first active rod 55 to move, so that the first drive block 551 is embedded in the drive groove 561. Then, the fourth motor 53 is driven, and the fourth motor 53 drives the first electric push rod 54 to rotate, so that the first drive block 551 drives the follower rod 56 to rotate. The follower rod 56 can bring the first clamping rod 71 and the second clamping rod 72 closer to each other to clamp the steel pipe, which facilitates the movement of the steel pipe by the movable seat 12.

[0040] like Figure 1 , 5As shown in Figure 7, the second auxiliary component 6 includes a second contact switch 61, a fifth motor 62, a second electric push rod 63, and a second drive rod 64. The second contact switch 61 is mounted on the frame 1 and is located on one side of the first contact switch 52 along the travel direction of the steel pipe. The contact rod 51 can move to contact the second contact switch 61. The fifth motor 62 is mounted on the frame 1, and there are two fifth motors 62. The output shaft of the second electric push rod 63 and the fifth motor 62 are fixedly connected, and the second drive rod 64 is fixedly connected to the piston rod of the second electric push rod 63. A second drive block 641 is fixedly connected to the second drive rod 64. The cross-section of the second drive block 641 is cross-shaped, and the second drive block 641 can be embedded in the drive groove 561. When the steel pipe pulled by the movable seat 12 completes the diameter change operation, the movable seat 12 contacts the second contact switch 61, thereby driving the second electric push rod 63. The second electric push rod 63 drives the movement of the second active rod 64, causing the second drive block 641 to embed into the drive groove 561. Then, it drives the fifth motor 62, which drives the rotation of the second electric push rod 63, thereby causing the second drive block 641 to move along the follower rod 56. The follower rod 56 can make the first clamping rod 71 and the second clamping rod 72 move away from each other, releasing the clamp on the steel pipe, so that the movable seat 12 can return to the initial position and pull the steel pipe again to perform the diameter change operation.

[0041] like Figure 8 and 9 As shown, a variable diameter wheel 14 slides relative to the frame 1. The variable diameter wheel 14 is located on the side of the second auxiliary component 6 away from the moving seat 12. A variable diameter groove 141 is formed on the outer diameter of the variable diameter wheel 14. The bottom of the groove 141 abuts against the surface of the steel pipe. Half of the bottom of the groove 141 matches the outer diameter of the steel pipe, and the other half is smaller than the outer diameter of the steel pipe, thereby realizing the change of the steel pipe diameter. The frame 1 is provided with a sliding component 4 for controlling the sliding of the variable diameter wheel 14. The sliding component 4 includes a rotating frame 41, a transmission rod 42, a sliding frame 43, and a third motor 44. The rotating frame 41 is rotatably connected to the frame 1. One end of the transmission rod 42 is hinged to the rotating frame 41, and the other end is hinged to the sliding frame 43. The sliding frame 43 is slidably connected to the frame 1. A slider is fixedly connected to the sliding frame 43. A groove for the slider to slide is formed on the frame 1. The variable diameter wheel 14 is rotatably connected to the sliding frame 43. A through hole for the steel pipe to pass through is formed on the sliding frame 43. The third motor 44 is mounted on the frame 1. The third motor 44 is a reversible motor, and its output shaft is fixedly connected to the rotating shaft of the rotating frame 41. When the steel pipe needs to be resized, the output shaft of the third motor 44 drives the rotating frame 41 to rotate. The rotation of the rotating frame 41 drives the transmission rod 42 to move, which in turn pulls or pushes the sliding frame 43, causing it to reciprocate. The movement of the sliding frame 43 drives the movement of the diameter-changing wheel 14, which applies force to the steel pipe, thus changing the diameter of its surface.

[0042] The implementation principle of a pipe diameter reducing device according to an embodiment of this application is as follows: The operator sequentially passes the steel pipe through the three-jaw chuck 131, support base 13, mounting base 11, and movable base 12. When the steel pipe needs to be diameter-changed, the three-jaw chuck 131 does not clamp the steel pipe. The first motor 24 drives the lead screw 21 to rotate, and the second motor 34 drives the rotating rod 31 to rotate. The first auxiliary component 5 controls the first clamping rod 71 and the second clamping rod 72 to clamp the steel pipe. The rotation of the lead screw 21 drives the movable base 12 to move, thereby causing the movable base 12 to pull the steel pipe and send it into the through hole of the sliding frame 43. The rotation of the rotating rod 31 drives the limit cylinder 121 to rotate, thereby driving the steel pipe to rotate, so that the steel pipe changes diameter when rotating, improving the diameter-changing effect of the steel pipe.

[0043] After the steel pipe diameter change is completed by the moving seat 12, the three-jaw chuck 131 clamps the steel pipe. The second auxiliary component 6 controls the first clamping rod 71 and the second clamping rod 72 to release the clamping of the steel pipe. The lead screw 21 drives the moving seat 12 back to the initial position and clamps the steel pipe again, and pulls the steel pipe to continue into the through hole of the sliding frame 43. The above operation is repeated to change the diameter of the steel pipe.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe diameter reducing device, characterized in that: The device includes a frame (1), on which a mounting base (11) and a movable base (12) are provided. The movable base (12) and the frame (1) are slidably connected. The mounting base (11) is provided with a first control component (2) for controlling the movement of the movable base (12). The frame (1) is provided with a support base (13), on which a three-jaw chuck (131) is rotatably mounted. The mounting base (11) is provided with a second control component (3) for controlling the rotation of the three-jaw chuck (131). The second control component (3) includes a rotating rod (31), and the steel pipe passes through the three-jaw chuck (131), support seat (13), mounting seat (11) and moving seat (12) in sequence. A variable diameter wheel (14) slides relative to the frame (1). A sliding component (4) for controlling the sliding of the variable diameter wheel (14) is provided on the frame (1). A variable diameter groove (141) is opened on the variable diameter wheel (14), and the bottom of the variable diameter groove (141) abuts against one end of the steel pipe passing through the moving seat (12). The movable seat (12) is rotatably connected to a limiting cylinder (121), through which the steel pipe passes. The limiting cylinder (121) is provided with a clamping assembly (7) for clamping the steel pipe. The movable seat (12) is provided with a first gear (122), a second gear (123), and a mating gear (124). The first gear (122) is sleeved on the rotating rod (31). A limiting block (1221) is fixedly connected inside the first gear (122). A limiting groove (311) for the limiting block (1221) to be embedded is provided on the rotating rod (31). The second gear (123) is fixedly connected to the limiting cylinder (121). The mating gear (124) is rotatably connected to the movable seat (12). The meshing of the first gear (122) and the second gear (123) is both meshed with the mating gear (124). The clamping assembly (7) includes a first clamping rod (71) and a second clamping rod (72). The first clamping rod (71) and the second clamping rod (72) are slidably connected to the limiting cylinder (121). The first clamping rod (71) and the second clamping rod (72) move closer to each other or further away from each other. A clamping groove (73) is formed between the first clamping rod (71) and the second clamping rod (72). The first clamping rod (71) and the second clamping rod (72) can be moved to abut against the steel pipe. The frame (1) is provided with a first auxiliary assembly (5) and a second auxiliary assembly (6). The first auxiliary assembly (5) is used to control the first clamping rod (71) and the second clamping rod (72) to move closer to each other. The second auxiliary assembly (6) is used to control the first clamping rod (71) and the second clamping rod (72) to move further away from each other. The first auxiliary component (5) includes a contact rod (51), a first contact switch (52), a fourth motor (53), a first electric push rod (54), a first driving rod (55), and a follower rod (56). The contact rod (51) and the moving base (12) are fixedly connected. The first contact switch (52) is mounted on the frame (1). The contact rod (51) is movable to contact the first contact switch (52). The fourth motor (53) is mounted on the frame (1). The output shafts of the moving push rod (54) and the fourth motor (53) are fixedly connected. The piston rods of the first active rod (55) and the first electric push rod (54) are fixedly connected. The follower rod (56) and the first clamping rod (71) are threadedly connected to the second clamping rod (72). A first driving block (551) is fixedly connected to the first active rod (55). A driving groove (561) is opened on the follower rod (56). The first driving block (551) can be embedded in the driving groove (561).

2. The pipe diameter reducing device according to claim 1, characterized in that: The first control component (2) includes a lead screw (21), a first sprocket (22), a first chain (23), and a first motor (24). The lead screw (21) is rotatably connected to the mounting base (11), and the lead screw (21) is threadedly connected to the movable base (12). The first sprocket (22) is located inside the mounting base (11). There are two first sprockets (22), one of which is fixedly connected to the lead screw (21), and the other is fixedly connected to the output shaft of the first motor (24). The first chain (23) is wound around the two first sprockets (22), and the first motor (24) is mounted on the mounting base (11).

3. The pipe diameter reducing device according to claim 1, characterized in that: The second control component (3) further includes a second sprocket (32), a second chain (33), a second motor (34), a third sprocket (35), and a third chain (36). The rotating rod (31) is rotatably connected to the mounting base (11), the moving base (12), and the support base (13). The second sprocket (32) is located inside the mounting base (11). There are two second sprockets (32), one of which is fixedly connected to the rotating rod (31), and the other is fixedly connected to the output shaft of the second motor (34). The second chain (33) is wound around the two second sprockets (32). The second motor (34) is mounted on the mounting base (11). The third sprocket (35) is located inside the support base (13). There are two third sprockets (35), one of which is fixedly connected to the rotating rod (31), and the other is fixedly connected to the rotating shaft of the three-jaw chuck (131). The third chain (36) is wound around the two third sprockets (35).

4. A pipe diameter reducing device according to claim 1, characterized in that: The sliding assembly (4) includes a rotating frame (41), a transmission rod (42), a sliding frame (43), and a third motor (44). The rotating frame (41) is rotatably connected to the frame (1). One end of the transmission rod (42) is hinged to the rotating frame (41), and the other end is hinged to the sliding frame (43). The sliding frame (43) is slidably connected to the frame (1). The variable diameter wheel (14) is rotatably connected to the sliding frame (43). The third motor (44) is mounted on the frame (1), and the output shaft of the third motor (44) is fixedly connected to the rotating shaft of the rotating frame (41).

5. A pipe diameter reducing device according to claim 1, characterized in that: A limiting plate (1211) is fixedly connected to the limiting cylinder (121), and the limiting plate (1211), the first clamping rod (71), and the second clamping rod (72) are all in contact with each other.

6. A pipe diameter reducing device according to claim 1, characterized in that: The second auxiliary component (6) includes a second contact switch (61), a fifth motor (62), a second electric push rod (63), and a second drive rod (64). The second contact switch (61) is located on one side of the first contact switch (52) along the direction of travel of the steel pipe. The second contact switch (61) is mounted on the frame (1). The contact rod (51) is movable to contact the second contact switch (61). The fifth motor (62) is mounted on the frame (1). The output shafts of the second electric push rod (63) and the fifth motor (62) are fixedly connected. The piston rods of the second drive rod (64) and the second electric push rod (63) are fixedly connected. A second drive block (641) is fixedly connected to the second drive rod (64). The second drive block (641) can be embedded in the drive groove (561).

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