Preparation device of spiral plum blossom pipe

Abstract

The invention relates to pipe preparation equipment, in particular to a spiral plum-blossom-shaped pipe preparation device which comprises a forming device used for rolling a round pipe into a plum-blossom-shaped pipe section; the transition device is arranged on the forming device and is used for driving the forming device to form a transition section which is transited from a round pipe to a plum blossom pipe section; the drawing device is arranged on one side of the forming device and is used for drawing the round pipe; and the rotating device is arranged on the drawing device and is used for rotating the circular pipe to form the spiral plum blossom pipe. According to the preparation device of the spiral plum-blossom-shaped pipe, the transition device is matched with the forming device to complete forming of the transition section and the plum-blossom-shaped pipe section, forming of the spiral pipe section is achieved through the drawing device and the rotating device, then machining of the spiral plum-blossom-shaped pipe with the transition section is completed, and meanwhile the structure and control are simple.

Description

Technical Field

[0001] The invention relates to a pipe preparation device, in particular to a spiral plum blossom pipe preparation device. Background Art

[0002] Special-shaped tubes are used in heat exchange equipment in the nuclear power field. The tubes have special-shaped sections and spiral extension structures that intersect with the commonly used round tubes. Under the same spatial volume, the heat exchange area of ​​the components is greatly increased. The spiral structure makes the heat energy transfer process more stable. Coupled with the extremely thin wall thickness, the heat conduction effect is improved and the heat exchange efficiency is higher. According to the design requirements, the two ends of the special-shaped tube are narrowed, and the middle is plum blossom-shaped with a spiral. The steel pipe is a refined pipe, which combines the characteristics of small outer diameter and thin wall thickness. Due to its special shape and characteristics, it has higher requirements for the manufacturing process. The forming stage must realize the transition from straight tube to plum blossom shape, and the plum blossom tube can also realize the spiral at the same time, and then the plum blossom tube will transition to a straight tube, and finally the two ends of the tube must be narrowed. While completing the above forming process, the dimensional accuracy and surface quality of the formed pipe must also be guaranteed.

[0003] like Figures 9 to 11 As shown, the spiral plum blossom tube includes a necking section 13 at both ends, a transition section 12 located on one side of the necking section 13 and a spiral plum blossom tube section 11 located between the two transition sections 12. The transition section 12 has a certain length and is also spirally arranged.

[0004] There is an existing method: the plum blossom tube can be formed by cold drawing using a cold drawing machine and a special-shaped outer die. At the same time, the outer die device is installed to add a rotating drive mechanism to achieve spiral forming. However, the transition section from round tube to plum blossom tube and from plum blossom tube to round tube cannot be achieved by cold drawing.

[0005] Another method is to use a cross punching device to make a pressing block of a corresponding shape to realize the forming of a plum blossom-shaped tube, but it cannot realize the spiral forming of the tube. Summary of the invention

[0006] In order to solve the problem that the above-mentioned existing equipment cannot process spiral plum blossom pipes, the present invention provides a preparation device for spiral plum blossom pipes, and the specific technical solution is: A preparation device for a spiral plum blossom tube comprises: a forming device, used for rolling a round tube into a plum blossom tube section; a transition device, arranged on the forming device, used for driving the forming device to form a transition section from the round tube to the plum blossom tube section; a drawing device, arranged on one side of the forming device, used for drawing the round tube; and a rotating device, arranged on the drawing device, used for rotating the round tube to form a spiral plum blossom tube.

[0007] Preferably, the forming device comprises: a forming frame; a slide rail, which is arranged on the forming frame and connected to the transition device, and the slide rail is provided with a forming track, a first transition track and a second transition track arranged on both sides of the forming track; a retaining frame, which is slidably mounted on the forming frame and is provided with a lifting hole and a rotating hole that are interconnected; a pressure roller, which is movably inserted into the rotating hole, and the roller shaft of the pressure roller is movably inserted into the lifting hole; wherein the roller shaft is also arranged relative to the forming track, the first transition track and the second transition track to adjust the distance between the pressure roller and the round tube so that the round tube forms a transition section and a plum blossom tube section.

[0008] Furthermore, the forming device also includes: a lifting bearing, which is installed on the roller shaft and movably inserted into the lifting hole.

[0009] Furthermore, the molding device also includes: a guide assembly, which is arranged on the molding frame and connected to the retaining frame.

[0010] Furthermore, arc-shaped forming grooves are symmetrically arranged on the pressing roller.

[0011] Furthermore, the transition device includes: a movable shaft, which is connected to the retaining frame and is provided with a driving external thread and a pulling through hole; a driving sleeve, which is rotatably arranged on the forming frame, and the driving sleeve is movably arranged on the movable shaft and is provided with a driving internal thread matching the driving external thread; and a driving assembly, which is connected to the driving sleeve and is used to drive the driving sleeve to rotate.

[0012] Furthermore, the driving assembly includes: a driving motor; a driving active pulley, which is arranged on the driving motor; a driving driven pulley, which is arranged on the driving sleeve; and a driving belt, which is sleeved on the driving active pulley and the driving driven pulley.

[0013] Preferably, the pulling device includes: a pulling fixed seat; a pulling movable seat, the pulling movable seat is slidably arranged on the pulling fixed seat; a pulling nut, the pulling nut is arranged on the pulling movable seat; a drawing screw rod, the drawing screw rod is rotatably arranged on the pulling fixed seat and connected to the drawing nut; and a pulling motor, the pulling motor is arranged on the pulling fixed seat and connected to the drawing screw rod.

[0014] Furthermore, the rotating device includes: a rotating shaft, which is rotatably arranged on the pulling and moving seat; a three-jaw chuck, which is arranged on the rotating shaft and is used to clamp the round tube; and a rotating assembly, which is arranged on the pulling and moving seat and connected to the rotating shaft.

[0015] Furthermore, the rotating component includes: a rotating motor, which is arranged on the pulling movable seat; a rotating driving pulley, which is arranged on the rotating motor; a rotating driven pulley, which is arranged on the rotating shaft; and a rotating belt, which is sleeved on the rotating driving pulley and the rotating driven pulley.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a preparation device for a spiral plum blossom tube, which completes the forming of a transition section and a plum blossom tube section through a transition device cooperating with a forming device, realizes the forming of the spiral tube section through a drawing device and a rotating device, and further completes the processing of the spiral plum blossom tube with a transition section, while having a simple structure and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of this application; Figure 2 It is a schematic diagram of the working status of this application; Figure 3 is a cross-sectional view of the forming device along the axial direction; Figure 4 is a cross-sectional view of the forming device along the radial direction; Figure 5 is a cross-sectional view of the slide rail; Figure 6 It is the front view of the cage; Figure 7 is a side view of the cage; Figure 8 It is the distribution diagram of four pressure rollers; Fig. 9 It is a schematic diagram of the structure of the spiral plum blossom tube; Fig.10 is along Fig. 9 Sectional view along line AA; Fig.11 It is a schematic diagram of the plum blossom pipe section. DETAILED DESCRIPTION

[0018] The present invention will be further described with reference to the accompanying drawings.

[0019] like Figures 1 to 8As shown, a preparation device for a spiral plum blossom tube includes a forming device 2, a transition device 3, a drawing device 4 and a rotating device 5, wherein the rotating device 5 is installed on the drawing device 4, the drawing device 4 is arranged opposite to the forming device 2, the transition device 3 is installed on the forming device 2, the forming device 2 is used to roll a round tube into a plum blossom tube segment 11; the transition device 3 is used to drive the forming device 2 to form a transition segment 12 from the round tube to the plum blossom tube segment 11; the drawing device 4 and the rotating device 5 are used to form a spiral plum blossom tube segment.

[0020] The forming device 2 can obtain a plum blossom-shaped pipe, and the transition device 3 can drive the forming device 2 to move forward and backward, thereby completing the processing of the transition section 12, so that the forming device 2 can complete the processing of the plum blossom pipe section 11 and the transition section 12. The overall structure is simple, the cost is low, the control is simple, and the processing is stable and reliable.

[0021] The forming device 2 includes a forming frame 21, a slide rail 22, a retaining frame 23 and a pressure roller 24. The forming frame 21 is arranged opposite to the drawing device 4, and the slide rail 22 is fixedly installed inside the forming frame 21. There are four slide rails 22 in a circular array. The slide rail 22 is provided with a forming track 223 and a first transition track 221 and a second transition track 222 located on both sides of the forming track 223. The forming track 223 is arranged at the center of the slide rail 22. The forming track 223 is arranged horizontally, and the first transition track 221 and the second transition track 222 are arranged obliquely. The first transition track 221 and the second transition track 222 are both connected to the forming track 223 in an arc transition, so as to form a continuous arc-shaped transition section 12. The slide rail 22 is also provided with a sliding groove 224, and the sliding groove 224 makes the slide rail 22 U-shaped. The retainer 23 is slidably mounted inside the forming frame 21. The retainer 23 is provided with a lifting hole 232 and a rotating hole 231 that are interconnected. The lifting hole 232 and the rotating hole 231 are in a cross shape, and there are four lifting holes 232 and the rotating hole 231 in a circular array. The lifting holes 232 and the rotating hole 231 are both arranged opposite to the slide rail 22, and the sliding groove 224 is arranged opposite to the rotating hole 231. The roller shaft 241 is symmetrically arranged on both sides of the pressure roller 24. The pressure roller 24 is movably inserted into the rotating hole 231 and the sliding groove 224. The roller shaft 241 is movably inserted into the lifting hole 232. The roller shaft 241 can be lifted and lowered along the lifting hole 232. The lifting hole 232 allows the pressure roller 24 to be lifted and lowered only in the vertical direction. The forming track 223, the first transition track 221 and the second transition track 222 are also arranged opposite to the roller shaft 241, and movably abut against the roller shaft 241 to adjust the distance between the pressure roller 24 and the round tube, so that the round tube forms a transition section 12 and a plum blossom tube section 11.

[0022] In order to reduce the friction between the roller shaft 241 and the lifting hole 232 and increase the service life of the pressure roller 24, a lifting bearing 25 is installed on the roller shaft 241, and the lifting bearing 25 is movably inserted in the lifting hole 232. The lifting bearing 25 can convert the sliding friction during lifting into rolling friction, and also avoid the friction when the roller shaft 241 rotates.

[0023] In order to improve the reliability and stability of the movement of the retainer 23, the forming device 2 also includes a guide assembly 26, which is arranged on the forming frame 21 and connected to the retainer 23. The guide assembly 26 includes a guide seat 263, a guide linear guide rail 262 and a guide slider 261. The guide seat 263 is fixed inside the forming frame 21, and there are four guide sliders 261 in the annular array. The guide slider 261 is fixed on the guide seat 263, and the guide slider 261 is slidably mounted on the guide linear guide rail 262. The guide linear guide rail 262 is fixed on the guide seat 263 and arranged along the sliding direction of the retainer 23. The guide linear guide rail 262 is also connected to the retainer 23. The four guide assemblies 26 make the retainer 23 evenly stressed.

[0024] In order to make the outer cylindrical surface of the pipe smooth, arc-shaped forming grooves 242 are symmetrically provided on the pressing roller 24, and two adjacent forming grooves 242 extrude the round pipe into a plum blossom shape.

[0025] The transition device 3 includes a moving shaft 31, a driving sleeve 32 and a driving assembly 35. One end of the moving shaft 31 is connected to one end of the retaining frame 23 through a flange. A drawing hole 311 is provided at the center of the moving shaft 31. The diameter of the drawing hole 311 is larger than the diameter of the round tube. The outer cylindrical surface of the moving shaft 31 is provided with a driving external thread 312. The driving sleeve 32 is rotatably mounted on the forming frame 21. In order to facilitate the installation of the driving sleeve 32, the driving sleeve 32 is connected to the driving frame 34 through a bearing. The driving frame 34 is installed at one end of the forming frame 21. The drive sleeve 32 is movably mounted on the moving shaft 31, and the interior of the drive sleeve 32 is provided with a drive internal thread matching the drive external thread 312; the drive assembly 35 is connected to the drive sleeve 32, and is used to drive the drive sleeve 32 to rotate, and the drive sleeve 32 drives the moving shaft 31 to move forward and backward along the axis, so that the lifting bearing 25 moves on the forming track 223, the first transition track 221 and the second transition track 222, and then adjusts the distance between the pressure roller 24 and the round tube, so that the round tube forms a transition section 12 and a plum blossom tube section 11. When the lifting bearing 25 is against the forming track 223, the plum blossom tube section 11 can be obtained, and when the lifting bearing 25 moves on the first transition track 221 and the second transition track 222 on both sides of the forming track 223, the transition section 12 can be formed.

[0026] The driving assembly 35 includes a driving motor 351, a driving pulley 352, a driving driven pulley 353 and a driving belt. The driving motor 351 is fixed to one end of the forming frame 21, the driving pulley 352 is arranged on the driving motor 351; the driving driven pulley 353 is arranged on the driving sleeve 32; and the driving belt is sleeved on the driving pulley 352 and the driving driven pulley 353. The driving motor 351 drives the driving sleeve 32 to rotate, the driving sleeve 32 drives the moving shaft 31 to move axially, and the moving shaft 31 drives the retaining frame 23 to move forward and backward, so that the forming track 223 and the transition track drive the pressure roller 24 to move up and down through the lifting bearing 25.

[0027] The guide assembly 26 can also ensure the stability of the translation of the pressing roller 24 and the retaining frame 23, and ensure the symmetry of the plum blossom-shaped cross section formed when the special-shaped tube is formed.

[0028] The drawing device 4 includes a drawing fixed seat, a drawing movable seat 42, a drawing nut 43, a drawing screw rod 44 and a drawing motor 45; the drawing movable seat 42 is slidably installed on the drawing fixed seat through a linear guide pair; the drawing nut 43 is fixed to the bottom of the drawing movable seat 42 and is connected to the drawing screw rod 44, the drawing screw rod 44 is rotatably installed on the drawing fixed seat through a bearing seat, one end of the drawing screw rod 44 is connected to the drawing motor 45 through a coupling, and the drawing motor 45 is fixed to one end of the drawing fixed seat.

[0029] The rotating device 5 includes a rotating shaft 51, a three-jaw chuck 52 and a rotating assembly 53. The rotating shaft 51 is rotatably mounted on the drawing and moving seat 42 through a bearing. One end of the rotating shaft 51 is connected to the three-jaw chuck 52. The three-jaw chuck 52 is coaxial with the moving shaft 31 and is used to clamp the round tube. The rotating assembly 53 is mounted on the drawing and moving seat 42 and is also connected to the rotating shaft 51. The rotating assembly 53 includes a rotating motor 531, a rotating driving pulley 532, a rotating driven pulley 533 and a rotating belt. The rotating motor 531 is fixed to the top of the drawing and moving seat 42 and is connected to the rotating driving pulley 532. The rotating driven pulley 533 is mounted on the other end of the rotating shaft 51. The rotating belt is sleeved on the rotating driving pulley 532 and the rotating driven pulley 533.

[0030] The rotating device 5 drives the formed plum blossom tube to rotate to obtain a spiral plum blossom tube. The drawing device 4 can control the pitch.

[0031] Working principle: The round tube passes through the moving shaft 31 and the pressure roller 24 in sequence, and then the end of the round tube is clamped on the three-jaw chuck 52.

[0032] like Figure 2As shown, in the initial state, the pressing rollers 24 are both located at the lowest point of the second transition track 222 on the left side of the forming track 223, and the distance between the two symmetrical pressing rollers 24 is greater than or equal to the outer diameter of the pipe.

[0033] The rotating motor 531 drives the round tube to rotate slowly through the three-jaw chuck 52, and the driving motor 351 drives the retaining frame 23 to move to the left through the driving sleeve 32 and the movable shaft 31. The pressure roller 24 rolls from the second transition track 222 to the forming track 223, and the distance between the two symmetrical pressure rollers 24 gradually decreases, completing the transition section 12 from the round tube to the plum blossom-shaped tube. At this time, the four pressure rollers 24 are combined together to form the required plum blossom shape.

[0034] When the driving motor 351 stops, the forming track 223 is kept against the lifting bearing 25, and the drawing motor 45 is started. The drawing motor 45 drives the drawing movable seat 42 to move through the drawing screw rod 44 and the drawing nut 43, and the drawing movable seat 42 drives the three-jaw chuck 52 to move to form the plum blossom spiral in the middle section of the pipe.

[0035] The three-jaw chuck 52 pulls the round tube to the right. When it is pulled to the set length, the drawing motor 45 stops, and the round tube maintains the axial position unchanged. Then the driving motor 351 drives the retaining frame 23 to move to the left through the driving sleeve 32 and the movable shaft 31, and the pressure roller 24 rolls from the forming track 223 to the lowest point of the first transition track 221, and the distance between the two symmetrical pressure rollers 24 gradually increases; then the driving motor 351 and the rotating motor 531 stop, completing the transition section 12 of the tube from the plum blossom tube to the round tube.

[0036] Remove the formed spiral plum blossom tube, confirm the position of the shrinkage 13, use the automatic taper shrinking machine to shrink the 13, and make the tapered surface transition. The total length is cut according to the requirements, the excess length at both ends of the tube is cut off, and then the surface visual and dimensional inspection, cleanliness / cleanliness inspection, and finally packaging are carried out.

[0037] The transition section 12 is formed naturally, the length of the middle section is precisely positioned, and the pitch of the spiral is required to be controlled by the rotation speed and movement speed of the round tube.

[0038] The spiral plum blossom tube has a small outer diameter, thin wall thickness and special forming shape. The preparation device of the spiral plum blossom tube can achieve efficient production and flexible adjustment, which can effectively ensure the outer diameter wall thickness, straightness, dimensional accuracy of the deformation section and surface quality.

[0039] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A device for preparing a spiral plum blossom tube, It is characterized in that include: A forming device (2) for rolling a round tube into a plum blossom tube section (11); A transition device (3) is provided on the forming device (2) and is used to drive the forming device (2) to form a transition section (12) that transitions from a round tube to a plum blossom tube section (11); A drawing device (4), arranged on one side of the forming device (2), and used for drawing the round tube; and The rotating device (5) is arranged on the drawing device (4) and is used to rotate the round tube to form a spiral plum blossom tube.

2. A preparation device for a spiral plum blossom tube according to claim 1, It is characterized in that The forming device (2) comprises: Forming frame (21); A slide rail (22), the slide rail (22) being arranged on the forming frame (21) and connected to the transition device (3), the slide rail (22) being provided with a forming rail (223), a first transition rail (221) and a second transition rail (222) arranged on both sides of the forming rail (223); A retaining frame (23), the retaining frame (23) being slidably mounted on the forming frame (21) and being provided with a lifting hole (232) and a rotating hole (231) which are communicated with each other; A pressure roller (24), the pressure roller (24) being movably inserted into the rotating hole (231), and a roller shaft (241) of the pressure roller (24) being movably inserted into the lifting hole (232); The roller shaft (241) is also arranged relative to the forming track (223), the first transition track (221) and the second transition track (222) to adjust the distance between the pressing roller (24) and the round tube so that the round tube forms a transition section (12) and a plum blossom tube section (11).

3. A preparation device for a spiral plum blossom tube according to claim 2, It is characterized in that The molding device (2) further comprises: a lifting bearing (25), wherein the lifting bearing (25) is mounted on the roller shaft (241) and is movably inserted into the lifting hole (232).

4. A device for preparing a spiral plum blossom tube according to claim 2, It is characterized in that The forming device (2) further comprises: a guide assembly (26), wherein the guide assembly (26) is arranged on the forming frame (21) and connected to the retaining frame (23).

5. A device for preparing a spiral plum blossom tube according to claim 2, It is characterized in that The pressing roller (24) is symmetrically provided with arc-shaped forming grooves (242).

6. A device for preparing a spiral plum blossom tube according to claim 2, It is characterized in that The transition device (3) comprises: A movable shaft (31), the movable shaft (31) being connected to the retaining frame (23) and provided with a driving external thread (312) and a drawing through hole (311); a driving sleeve (32), the driving sleeve (32) being rotatably mounted on the forming frame (21), the driving sleeve (32) being movably mounted on the movable shaft (31) and being provided with a driving internal thread matching the driving external thread (312); and A driving assembly (35), the driving assembly (35) being connected to the driving sleeve (32) and being used to drive the driving sleeve (32) to rotate.

7. A device for preparing a spiral plum blossom tube according to claim 6, It is characterized in that The driving assembly (35) comprises: Drive motor (351); A driving pulley (352), wherein the driving pulley (352) is arranged on the driving motor (351); A driving driven pulley (353), wherein the driving driven pulley (353) is arranged on the driving sleeve (32); and A driving belt, wherein the driving belt is sleeved on the driving active pulley (352) and the driven driving pulley (353).

8. The device for preparing a spiral plum blossom tube according to claim 1, It is characterized in that The pulling device (4) comprises: Pull out the fixed seat; A pulling movable seat (42), the pulling movable seat (42) being slidably disposed on the pulling fixed seat; A pulling nut (43), wherein the pulling nut (43) is arranged on the pulling movable seat (42); A drawing screw rod (44), the drawing screw rod (44) being rotatably mounted on the drawing fixing seat and connected to the drawing nut (43); and A drawing motor (45), wherein the drawing motor (45) is disposed on the drawing fixing seat and is connected to the drawing screw rod (44).

9. A device for preparing a spiral plum blossom tube according to claim 8, It is characterized in that The rotating device (5) comprises: A rotating shaft (51), the rotating shaft (51) being rotatably disposed on the pulling movable seat (42); a three-jaw chuck (52), the three-jaw chuck (52) being arranged on the rotating shaft (51) and being used for clamping a round tube; and A rotating assembly (53), wherein the rotating assembly (53) is disposed on the pulling movable seat (42) and is connected to the rotating shaft (51).

10. A device for preparing a spiral plum blossom tube according to claim 9, It is characterized in that The rotating assembly (53) comprises: A rotating motor (531), wherein the rotating motor (531) is arranged on the pulling movable seat (42); A rotating driving pulley (532), wherein the rotating driving pulley (532) is arranged on the rotating motor (531); a rotating driven pulley (533), wherein the rotating driven pulley (533) is disposed on the rotating shaft (51); and A rotating belt is sleeved on the rotating driving pulley (532) and the rotating driven pulley (533).

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