A process and apparatus for producing a hollow wall wound pipe

Abstract

The application discloses a kind of hollow wall winding pipe production device, including winding component, oscillation component and mist cooling component;The winding component is used to spiral lap for plastic square tube, and welding winding;The oscillation component is used to knock vibration for whole winding drum by rotating knock, auxiliary molten flow even joint filling, prevent the generation of bubble gap;The mist cooling component is used to continue rotating and dispersing straightly and cooling water flow in the inner wall side of plastic square tube, and the inner wall of plastic square tube that has been spirally lapped is released flow continuously mist cooling cooling.The application also includes a kind of hollow wall winding pipe production device production process, including the following steps: S1, conveying material;S2, winding and oscillating material;S3, continuous mist cooling cooling.The application is set by oscillation component, and hot melt molten solder flows independently, and air inside weld joint is discharged in time, and lap bubble, welding gap, false welding cracking defect are eliminated.

Description

Technical Field

[0001] This invention relates to the field of spiral wound tube production technology, and in particular to a process and apparatus for producing hollow-wall spiral wound tubes. Background Technology

[0002] Hollow wall spiral pipe, as a new type of lightweight and high-strength pipe material, is widely used in municipal drainage, sewage treatment, rainwater collection and underground pipe network construction. This type of pipe is usually made by thermoplastic extrusion molding and by using fusion welding to spiral and weld the hollow wall pipe sections layer by layer, finally forming a structurally stable hollow wall pipe body.

[0003] Current spiral wound pipe production equipment suffers from several drawbacks. During the spiral welding of plastic segments and the overlapping of the pipe blanks, the molten material is extruded and pushed through the filler, resulting in slow diffusion of the molten material between the weld seams and the formation of local voids and air bubbles. This leads to weak bonding. Alternatively, vibration is applied only to the discharge area, resulting in a small vibration zone and extremely slow diffusion, leading to low efficiency. Therefore, this invention proposes a hollow-wall spiral wound pipe production process and apparatus. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hollow-walled spiral tube manufacturing process and apparatus.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hollow-wall spiral tube production apparatus includes a spiral tube assembly, an oscillation assembly, and a mist cooling assembly;

[0007] The tube winding assembly is used to spirally overlap and weld plastic square tubes. The tube winding assembly includes a fixed base, a fixed column fixedly disposed on the fixed base, and a disc base fixedly disposed on the fixed column.

[0008] The oscillation assembly is used to continuously and evenly vibrate the entire winding drum by rotating and striking, which helps the molten material flow smoothly and fill the gaps, and prevents the generation of air bubbles and gaps. The oscillation assembly includes a rotating shaft that is rotatably set on one side of the disc base, a rotating disk that is fixedly set at the end of the rotating shaft, and three push rods that are fixedly set on the outer wall of the rotating disk.

[0009] The mist cooling component is used to continuously rotate and disperse the cooling water flow that directly hits the inner wall of the plastic square tube, and to provide slow-release continuous mist cooling to the inner wall of the spirally overlapped plastic square tube. The mist cooling component includes an atomizing mesh tube that is rotatably connected to one side of the disc base.

[0010] A fixing cylinder is fixedly installed on one side of the disc base. The fixing cylinder is located inside the atomizing mesh cylinder and outside the rotating shaft. A side plate is fixedly installed on one side of the fixing cylinder. Several sprocket rods are arranged in a circular array on the outer ring of the disc base near the atomizing mesh cylinder.

[0011] A top frame is fixedly installed on the top of the fixed column, a flattener is installed at the bottom of the top frame, a traction device is slidably installed between the top frame and the fixed base, and a discharge device is fixedly installed on the top of the fixed column near the disc base.

[0012] Preferably, a rotating roller is rotatably provided between one side of each sprocket rod and the side plate, and an electric drive is fixedly provided on one side of the bottom of the fixed column. The chain wheel on the drive end of the electric drive is engaged with the sprocket rod in a ring through a synchronous chain belt.

[0013] Preferably, the rotating shaft and the side plate are rotatably connected, and the end of the rotating shaft extends through the side plate to the outside of the side plate. Each rotating roller is fixedly provided with a vibration guide column inside, and the end of each vibration guide column extends through the side plate to the outside of the side plate.

[0014] Preferably, a guide block is fixedly installed at the end of every six guide columns. The bottom of the guide block has an inner groove, and a top block is rotatably installed inside the inner groove. A fixing plate is fixedly installed on one side of the side plate between the guide block and the rotating disk. Several damping springs are fixedly installed between the fixing plate and the top block. A stop bar is fixedly installed on the side of the top block near the center of rotation and close to the fixing plate. A motor is fixedly installed on one side of the fixed column, and the drive end of the motor is fixedly connected to the rotating shaft.

[0015] Preferably, two fixed blocks are fixedly installed inside the fixed cylinder, and the rotating shaft rotates through the two fixed blocks. A reciprocating screw is fixedly sleeved on the outside of the rotating shaft on one side of one of the fixed blocks, and a guide rod is fixedly installed on one side of the fixed block and below the reciprocating screw. A screw nut is threadedly slidably connected to the reciprocating screw and slidably connected through it to the guide rod. A pressure rod is fixedly installed on one side of the screw nut, and a piston is fixedly installed at the end of the pressure rod.

[0016] Preferably, a first water tank is fixedly installed on one side of another fixed block and below the rotating shaft. The piston is slidably installed inside the first water tank. A diverter pipe is fixedly installed at the end of the first water tank. Three water outlet pipes are fixedly installed on the diverter pipes respectively. Several nozzles are installed on the three water outlet pipes. Each nozzle extends through the fixed cylinder to the outside of the fixed cylinder and remains inside the atomizing mesh cylinder. A second water tank is fixedly installed on the side of the fixed column near the motor and below the motor. The second water tank and the first water tank are connected by a water inlet pipe. The atomizing mesh cylinder is rotatably sleeved on the outside of the entire fixed cylinder.

[0017] Preferably, a first gear is fixedly installed at one end of the rotating shaft near the base of the disc and inside the fixed cylinder. A second gear that meshes with the first gear is rotatably connected to the side of the disc base near the first gear and inside the atomizing mesh cylinder. A planetary gear that meshes with the second gear is fixedly installed on the inner wall of the side of the atomizing mesh cylinder near the second gear.

[0018] Preferably, the stop bar is attached to one side of the fixed plate when the top block is normally pushed into the inner groove by the damping spring, and the ends of the push rod and the stop bar are provided with matching smooth inclined surfaces. The guide block, the top block and the fixed plate are all arc-shaped structures.

[0019] Preferably, the diversion pipe is fixedly arranged in a ring on the inner wall of the fixed cylinder. Both the diversion pipe and the water inlet pipe are equipped with one-way valves. The nozzle sprays water towards the atomizing screen cylinder. The rotation of the atomizing screen cylinder disperses the sprayed water flow, and the water mist follows the rotation of the atomizing screen cylinder and flows out from its interior.

[0020] The production process of a hollow-wall spiral wound tube production device includes the following steps:

[0021] S1. Plastic square tubes are extruded and conveyed through the feeding area. The traction square tubes are spirally overlapped along the winding drum. The flattener pre-presses and positions the overlap joint and then heat-melts it.

[0022] S2. The motor drives the rotating shaft to rotate, and the push rod periodically presses against the stop rod. The vibration is transmitted to the rotating roller through the damping spring, guide block, and guide column, which continuously strikes and vibrates the winding drum, and the weld molten material is evenly filled into the joint.

[0023] S3. The second water tank replenishes water to the first water tank through the inlet pipe. The rotating shaft drives the reciprocating screw to drive the piston to pump cooling water back and forth. The cooling water is sprayed out through the distribution pipe and each nozzle. The atomizing screen rotates synchronously to disperse the water mist and mist-cool and shape the overlapping position of the inner wall of the pipe.

[0024] The present invention has the following beneficial effects:

[0025] 1. By setting up an oscillation component, the motor drives the rotating shaft to rotate the rotating disk and push rod to strike the stop bar. With the help of the damping spring, the damping spring rebounds and resets, and the linkage guide column and arc-shaped guide block drive the entire set of rotating rollers to vibrate at high frequency and micro amplitude. The vibration can fully cover the spiral lap weld area of ​​the plastic square tube, so that the hot melt weld material flows autonomously and fills the gap, and timely removes the air trapped inside the weld, eliminating defects such as lap bubbles, weld gaps, and incomplete weld cracks. At the same time, the damping spring buffers the rigid impact force, avoids the extrusion deformation of the uncured hot melt pipe, ensures the uniformity of the pipe wall thickness, and effectively improves the integrity of the weld of the hollow wall spiral pipe.

[0026] 2. By setting up a mist cooling component, the rotating shaft drives the reciprocating screw and piston to complete the cooling water pressure stabilization pumping. In conjunction with gear meshing transmission, it drives the atomizing screen cylinder to rotate independently at a differential speed, dispersing the direct jet of water from the nozzle into a diffused circulating water mist, replacing the traditional high-pressure direct injection water cooling method. On the one hand, it avoids the problems of cold spots, shrinkage pits, and wall thickness deviation caused by high-pressure water jets directly hitting the high-temperature pipe wall. On the other hand, the water mist circulates throughout the pipe's inner wall, balancing the cooling temperature difference between the inside and outside of the pipe, eliminating residual cooling stress, effectively avoiding pipe elliptical and warping deformation problems, improving the roundness of the finished pipe, reducing the subsequent pipe rounding processing steps, and reducing processing time.

[0027] 3. By using a set of motors to drive the rotating shaft, three operations—vibration and hammering, cooling water pumping, and atomizing screen rotation—can be completed simultaneously. This simplifies the overall electrical control structure, reduces equipment energy consumption and circuit maintenance costs. Furthermore, the fixed cylinder isolates water vapor from the transmission components, reducing the risk of corrosion and jamming in transmission parts, and decreasing the frequency of equipment maintenance and parts replacement. The entire device can simultaneously complete the entire continuous process of square tube feeding, spiral winding, hot melt welding, vibration shaping, inner wall mist cooling, and finished product discharge without stopping the machine to wait for the weld to solidify and cool. This shortens the pipe forming cycle, reduces the scrap rate of finished products, and improves the utilization rate of plastic raw materials. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main structure of a hollow wall spiral tube production process and apparatus proposed in this invention;

[0029] Figure 2 This is a side view of the production process and apparatus for hollow wall spiral tubes proposed in this invention.

[0030] Figure 3 This is a schematic diagram of the tube winding assembly in this invention;

[0031] Figure 4 This is a schematic diagram of one side of the fixed column in this invention;

[0032] Figure 5 This is a schematic diagram of the rotating roller array in this invention;

[0033] Figure 6This is a schematic diagram of the oscillation component in this invention;

[0034] Figure 7 This is a schematic diagram of the atomizing mesh cylinder in this invention;

[0035] Figure 8 This is a schematic diagram of the internal structure of the fixed cylinder in this invention;

[0036] Figure 9 This is a schematic diagram of the structure of the fog-cooling component in this invention;

[0037] Figure 10 This is a side view of the fog-cooling component in this invention.

[0038] Figure 11 This is a schematic diagram of the planetary gear set in this invention.

[0039] In the diagram: 1. Fixed base, 2. Fixed column, 3. Top frame, 4. Flattener, 5. Tractor, 6. Disc base, 7. Fixed cylinder, 8. Side plate, 9. Sprocket rod, 10. Rotating roller, 11. Electric drive, 12. Synchronous chain belt, 13. Rotating shaft, 14. Rotating disc, 15. Push rod, 16. Vibration guide column, 17. Vibration guide block, 18. Inner groove, 19. Top block, 20. Fixed plate, 21. Damping spring, 22. Stop bar, 23. Fixed block, 24. Reciprocating screw, 25. Guide rod, 26. Screw nut, 27. Pressure rod, 28. Piston, 29. First water tank, 30. Diverter pipe, 31. Water outlet pipe, 32. Nozzle, 33. Second water tank, 34. Water inlet pipe, 35. Atomizing screen cylinder, 36. First gear, 37. Second gear, 38. Planetary gear, 39. Discharge device, 40. Motor. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0041] Example 1:

[0042] Reference Figures 1-4 A hollow-wall spiral tube manufacturing process and apparatus, including a spiral tube assembly, an oscillation assembly and a mist cooling assembly;

[0043] The tube winding assembly is used to spirally overlap and weld plastic square tubes. The tube winding assembly includes a fixed base 1, a fixed column 2 fixedly disposed on the fixed base 1, and a disc base 6 fixedly disposed on the fixed column 2.

[0044] The oscillation assembly is used to continuously and evenly vibrate the entire winding drum by rotating and striking, which helps the molten material flow smoothly and fill the gaps, and prevents the generation of air bubbles and gaps. The oscillation assembly includes a rotating shaft 13 rotatably set on one side of the disc base 6, a rotating disk 14 fixedly set at the end of the rotating shaft, and three push rods 15 fixedly set on the outer wall of the rotating disk 14.

[0045] The mist cooling component is used to continuously rotate and disperse the cooling water flow that directly hits the inner wall of the plastic square tube, and to provide slow-release continuous mist cooling to the inner wall of the spirally overlapped plastic square tube. The mist cooling component includes an atomizing mesh tube 35 that is rotatably connected to one side of the disc base 6.

[0046] A fixing cylinder 7 is fixedly installed on one side of the disc base 6. The fixing cylinder 7 is located inside the atomizing mesh cylinder 35 and outside the rotating shaft 13. A side plate 8 is fixedly installed on one side of the fixing cylinder 7. Several sprocket rods 9 are arranged in a circular array on the outer ring of the disc base 6 near the atomizing mesh cylinder 35.

[0047] A top frame 3 is fixedly installed on the top of the fixed column 2, a flattener 4 is installed at the bottom of the top frame 3, a traction device 5 is slidably installed between the top frame 3 and the fixed base 1, and a discharge device 39 is fixedly installed on the top of the fixed column 2 near the disc base 6.

[0048] A rotating roller 10 is rotatably installed between one side of each sprocket rod 9 and the side plate 8. An electric drive 11 is fixedly installed on one side of the bottom of the fixed column 2. The chain wheel on the drive end of the electric drive 11 is engaged with the sprocket rod 9 in a ring through a synchronous chain belt.

[0049] In this embodiment, a flattener 4 is vertically suspended on the bottom surface of the top frame 3. The flattener 4 can be vertically adjusted to finely adjust the pressing height to accommodate different wall thicknesses of plastic square tubes. A traction device 5 is slidably assembled between the top frame 3 and the fixed base 1 via a vertical slide rail. The traction device 5 can uniformly and longitudinally pull the formed tube material out. A discharge device 39 is bolted to the upper right side of the fixed column 2. The discharge device 39 is externally connected to a hot melt plastic extruder, which can quantitatively extrude HDPE molten welding material to fill the spiral overlap gap of the square tube.

[0050] Furthermore, the end of the long HDPE plastic square tube is fed into the rotating roller 10 that is forming the enclosure. The pressing height of the top flattener 4 is adjusted to fit and limit the overlapping position of the plastic square tube. The electric drive 11 is started. The electric drive 11 drives all the sprocket rods 9 and the rotating roller 10 to rotate synchronously in the same direction through the synchronous chain belt. This drives the plastic square tube to spiral around the outer wall of the rotating roller 10 at a uniform speed to overlap. The sliding traction device 5 cooperates to uniformly pull the formed tube out of the outlet. The discharge device 39 simultaneously extrudes molten HDPE welding material to fill the spiral overlap splice gap of the square tube, completing the initial hot melt overlap welding.

[0051] Furthermore, with the synchronous chain drive structure, all 10 rotating rollers can rotate synchronously in the same direction, preventing problems such as twisting pitch deviation and overlapping misalignment, accurately controlling the overlap width of square tubes, and forming uniform wall thickness. At the same time, different diameter sprocket rods can be replaced to adapt to the production of multiple specifications of pipes, making the equipment highly versatile and reducing the procurement cost of the production line.

[0052] Example 2:

[0053] Reference Figure 5 and Figure 6 Compared to Embodiment 1, in this embodiment, the rotating shaft 13 and the side plate 8 are rotatably connected, and the end of the rotating shaft 13 extends through the side plate 8 to the outside of the side plate 8. Each rotating roller 10 is fixedly provided with a vibration guide column 16 inside, and the end of each vibration guide column 16 extends through the side plate 8 to the outside of the side plate 8.

[0054] Each of the six guide columns 16 has a guide block 17 fixedly installed at its end. The bottom of the guide block 17 has an inner groove 18. A top block 19 is rotatably installed inside the inner groove 18. A fixing plate 20 is fixedly installed on one side of the side plate 8 between the guide block 17 and the rotating disk 14. Several damping springs 21 are fixedly installed between the fixing plate 20 and the top block 19. A stop bar 22 is fixedly installed on the side of the top block 19 located at the center of rotation and close to the fixing plate 20. A motor 40 is fixedly installed on one side of the fixing column 2. The drive end of the motor 40 is fixedly connected to the rotating shaft 13.

[0055] In this embodiment, the starter motor 40 drives the rotating shaft 13 to rotate at a constant speed. The right end of the rotating shaft 13 drives the rotating disk 14 and the three push rods 15 to rotate in a circle. The inclined surface of the push rod 15 periodically hits the stop bar 22, pushing the top block 19 to compress the damping spring 21 and retract it to the inner side of the inner groove 18. After the push rod 15 disengages from the stop bar 22, the damping spring 21 rebounds and pushes the top block 19 back to its original position, reciprocating to drive the arc-shaped guide block 17 and the guide column 16 to vibrate at a high frequency.

[0056] Furthermore, the vibration is transmitted to each set of rotating rollers 10, and then to the spiral lap welding joint. The molten weld material at the lap joint flows freely and fills the gap, expelling the air trapped inside the weld and eliminating defects such as bubbles, incomplete welds, and splice gaps. At the same time, the damping spring buffers the impact force, preventing the uncured pipe from being deformed under pressure and ensuring the uniformity of the pipe wall thickness.

[0057] Furthermore, through the single-power drive of the motor 40, the push rod 15 rotates and impacts the stop rod 22, which, in conjunction with the damping spring 21, rebounds and resets, driving the guide block 17 and the rotating roller 10 to vibrate at high frequency and with small amplitude. The vibration is transmitted throughout the entire range to the lap weld of the pipe, expelling air bubbles from the weld and compacting the gap. The damping spring buffers the rigid impact force, preventing the pipe from undergoing thermal deformation and improving the integrity, ring stiffness, and anti-seepage performance of the pipe weld.

[0058] Example 3:

[0059] Reference Figures 7-11 Compared to Embodiment 1 and Embodiment 2, in this embodiment, the fixed cylinder 7 is internally fixed with two fixed blocks 23. The rotating shaft 13 rotates through the two fixed blocks 23. A reciprocating screw 24 is fixedly sleeved on the outside of the rotating shaft 13 on one side of one of the fixed blocks 23. A guide rod 25 is fixedly installed on one side of one of the fixed blocks 23 and below the reciprocating screw 24. A screw nut 26 is threaded and slidably connected to the guide rod 25. A pressure rod 27 is fixedly installed on one side of the screw nut 26. A piston 28 is fixedly installed at the end of the pressure rod 27.

[0060] A first water tank 29 is fixedly installed on one side of another fixed block 23 and below the rotating shaft 13. A piston 28 is slidably installed inside the first water tank 29. A diversion pipe 30 is fixedly installed at the end of the first water tank 29. Three water outlet pipes 31 are fixedly installed on the diversion pipe 30 respectively. Several nozzles 32 are installed on the three water outlet pipes 31. Each nozzle 32 extends through the fixed cylinder 7 to the outside of the fixed cylinder 7 and remains inside the atomizing mesh cylinder 35. A second water tank 33 is fixedly installed on the side of the fixed column 2 close to the motor 40 and below the motor 40. The second water tank 33 is connected to the first water tank 29 through a water inlet pipe 34. The atomizing mesh cylinder 35 is rotatably sleeved on the outside of the entire fixed cylinder 7.

[0061] A first gear 36 is fixedly installed on one end of the rotating shaft 13 near the disc base 6 and inside the fixed cylinder 7. A second gear 37 that meshes with the first gear 36 is rotatably connected to the side of the disc base 6 near the first gear 36 and inside the atomizing mesh cylinder 35. A planetary gear 38 that meshes with the second gear 37 is fixedly installed on the inner wall of the side of the atomizing mesh cylinder 35 near the second gear 37.

[0062] In this embodiment, the rotation of the rotating shaft 13 synchronously drives the inner reciprocating screw 24 to rotate, and the screw nut 26 slides horizontally back and forth along the guide rod 25. The piston 28 is driven to push and pull back and forth inside the first water tank 29 through the pressure rod 27. Cooling water in the second water tank 33 is replenished into the first water tank 29 through the water inlet pipe 34 and the one-way valve. The piston 28 squeezes the cooling water into the annular diverter pipe 30, and sprays it into the inner side of the atomizing screen cylinder 35 through the water outlet pipe 31 and the nozzle 32 with stable pressure and direction.

[0063] Simultaneously, the first gear 36 at the left end of the rotating shaft 13 meshes with the second gear 37 and the planetary gear 38, driving the atomizing mesh cylinder 35 to rotate at high speed differentially. The mesh disperses the columnar water flow into ultra-fine dispersed water mist. The water mist circulates with the rotating mesh cylinder, covering the entire inner wall of the hollow winding tube, achieving slow-release and uniform mist cooling. This matches the natural cooling rate of the outer wall of the tube, eliminates cooling stress, and prevents the tube from elliptical deformation. The one-way valve in the water circuit prevents backflow and pressure loss of cooling water, ensuring uninterrupted cooling operation.

[0064] Furthermore, the atomizing screen 35 converts high-pressure direct current water into slow-release circulating water mist, which fully covers the inner wall of the pipe to cool it down, avoids cold spots and shrinkage pits on the pipe wall, balances the cooling stress inside and outside the pipe, ensures the roundness of the finished pipe, and reduces the workload of the subsequent rounding process.

[0065] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hollow-walled spiral tube production apparatus, comprising a spiral tube winding assembly, an oscillation assembly, and a mist cooling assembly, characterized in that: The tube winding assembly is used to spirally overlap and weld the plastic square tube. The tube winding assembly includes a fixed base (1), a fixed column (2) fixed on the fixed base (1), and a disc base (6) fixed on the fixed column (2). The oscillation assembly is used to continuously and evenly vibrate the entire winding drum by rotating and striking, which helps the molten material flow smoothly and fill the gaps, and prevents the generation of air bubbles and gaps. The oscillation assembly includes a rotating shaft (13) rotatably set on one side of the disc base (6), a rotating disk (14) fixedly set at the end of the rotating shaft, and three push rods (15) fixedly set on the outer wall of the rotating disk (14). The mist cooling component is used to continuously rotate and disperse the cooling water flow that directly hits the inner wall of the plastic square tube, and to continuously cool the inner wall of the spirally overlapped plastic square tube by slow-release flow. The mist cooling component includes an atomizing mesh cylinder (35) rotatably connected to one side of the disc base (6). A fixing cylinder (7) is fixedly installed on one side of the disc base (6). The fixing cylinder (7) is located inside the atomizing mesh cylinder (35) and outside the rotating shaft (13). A side plate (8) is fixedly installed on one side of the fixing cylinder (7). Several sprocket rods (9) are arranged in a circular array on the outer ring of the disc base (6) near the atomizing mesh cylinder (35). A top frame (3) is fixedly installed on the top of the fixed column (2), a flattener (4) is installed at the bottom of the top frame (3), a traction device (5) is slidably installed between the top frame (3) and the fixed base (1), and a discharge device (39) is fixedly installed on the top of the fixed column (2) near the disc base (6).

2. The hollow-walled spiral tube production apparatus according to claim 1, characterized in that, A rotating roller (10) is rotatably provided between one side of each sprocket rod (9) and the side plate (8). An electric drive (11) is fixedly provided on one side of the bottom of the fixed column (2). The chain wheel on the drive end of the electric drive (11) is engaged with the sprocket rod (9) in a ring through a synchronous chain belt.

3. The hollow-walled spiral tube production apparatus according to claim 1, characterized in that, The rotating shaft (13) is rotatably connected to the side plate (8), and the end of the rotating shaft (13) extends through the side plate (8) to the outside of the side plate (8). Each rotating roller (10) is fixedly provided with a vibration guide column (16), and the end of each vibration guide column (16) extends through the side plate (8) and to the outside of the side plate (8).

4. The hollow wall winding tube production apparatus according to claim 3, characterized in that, Each of the six guide columns (16) has a guide block (17) fixedly installed at its end. The bottom of the guide block (17) has an inner groove (18). A top block (19) is rotatably installed inside the inner groove (18). A fixing plate (20) is fixedly installed on one side of the side plate (8) between the guide block (17) and the rotating disk (14). Several damping springs (21) are fixedly installed between the fixing plate (20) and the top block (19). A stop bar (22) is fixedly installed on the side of the top block (19) near the center of rotation and close to the fixing plate (20). A motor (40) is fixedly installed on one side of the fixing column (2). The drive end of the motor (40) is fixedly connected to the rotating shaft (13).

5. The hollow-walled spiral tube production apparatus according to claim 1, characterized in that, The fixed cylinder (7) is fixedly provided with two fixed blocks (23). The rotating shaft (13) rotates through the two fixed blocks (23). A reciprocating screw (24) is fixedly sleeved on the outside of the rotating shaft (13) on one side of one of the fixed blocks (23). A guide rod (25) is fixedly provided on one side of the fixed block (23) and below the reciprocating screw (24). A screw nut (26) is threaded and slidably connected to the guide rod (25). A pressure rod (27) is fixedly provided on one side of the screw nut (26). A piston (28) is fixedly provided at the end of the pressure rod (27).

6. The hollow-walled spiral tube production apparatus according to claim 5, characterized in that, A first water tank (29) is fixedly installed on one side of another fixed block (23) and below the rotating shaft (13). The piston (28) is slidably installed inside the first water tank (29). A diversion pipe (30) is fixedly installed at the end of the first water tank (29). Three water outlet pipes (31) are fixedly installed on the diversion pipe (30). Several nozzles (32) are installed on the three water outlet pipes (31). Each nozzle (32) extends through the fixed cylinder (7) to the outside of the fixed cylinder (7) and remains inside the atomizing mesh cylinder (35). A second water tank (33) is fixedly installed on the side of the fixed column (2) close to the motor (40) and below the motor (40). The second water tank (33) is connected to the first water tank (29) through a water inlet pipe (34). The atomizing mesh cylinder (35) is rotatably sleeved on the outside of the entire fixed cylinder (7).

7. A hollow-walled spiral tube production apparatus according to claim 6, characterized in that, The rotating shaft (13) is fixedly provided with a first gear (36) at one end near the disc base (6) and inside the fixed cylinder (7). The disc base (6) is rotatably connected to a second gear (37) that meshes with the first gear (36) on one side near the first gear (36) and inside the atomizing mesh cylinder (35). The inner wall of the atomizing mesh cylinder (35) near the second gear (37) is fixedly provided with a planetary gear (38) that meshes with the second gear (37).

8. The hollow wall winding tube production apparatus according to claim 4, characterized in that, When the top block (19) is normally pushed against the inside of the inner groove (18) by the damping spring (21), the stop bar (22) is attached to one side of the fixing plate (20). The ends of the push rod (15) and the stop bar (22) are both provided with matching smooth inclined surfaces. The guide block (17), the top block (19) and the fixing plate (20) are all arc-shaped structures.

9. A hollow-walled spiral tube production apparatus according to claim 6, characterized in that, The diversion pipe (30) is fixedly arranged in a ring on the inner wall of the fixed cylinder (7). Both the diversion pipe (30) and the water inlet pipe (34) are equipped with one-way valves. The nozzle (32) sprays water towards the atomizing screen cylinder (35). The atomizing screen cylinder (35) rotates to disperse the sprayed water flow. The water mist follows the rotation of the atomizing screen cylinder (35) and flows out from its interior.

10. The production process of the hollow wall spiral tube production apparatus as described in claims 1-9, comprising the following steps: S1. Plastic square tubes are extruded and conveyed through the feeding area. The traction square tubes are spirally overlapped along the winding drum. The flattener (4) pre-presses and positions the overlap joint and heat-melts it. S2, the motor (40) drives the rotating shaft (13) to rotate, the push rod (15) periodically presses the stop rod (22), and the vibration is transmitted to the rotating roller (10) through the damping spring (21), the guide block (17) and the guide column (16), which continuously strikes and vibrates the winding drum, and the weld molten material is evenly filled into the joint; S3. The second water tank (33) replenishes water to the first water tank (29) through the water inlet pipe (34). The rotating shaft (13) drives the reciprocating screw (24) to drive the piston (28) to pump cooling water back and forth. The cooling water is sprayed out through the diversion pipe (30) and each nozzle (32). The atomizing screen (35) rotates synchronously to disperse the water mist and mist-cool and shape the overlapping position of the inner wall of the pipe.

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