Spiral winding forming machine

Abstract

The invention belongs to the technical field of material forming, and particularly provides a spiral winding forming machine which comprises a rack, a pipe heating assembly, a rotating assembly and a winding assembly, a feeding channel is formed in the rack, a hot air inlet is formed in the top of the feeding channel, and a hot air outlet is formed in the bottom of the feeding channel. The rotating frame drives the winding assembly to rotate, so that the strip is wound on the periphery of the pipe in a spiral mode. In order to improve the bonding strength of the winding layer, on one hand, the pipe heating assembly can form hot air passing through the feeding channel from top to bottom to preheat the core pipe; and on the other hand, the strip heating mechanism can heat the winding face of the strip. The pipe heating assembly and the strip heating mechanism jointly act, the bonding strength of the strip and the core pipe can be improved, the problem that the bonding strength of a winding layer is poor due to the fact that the temperature of the core pipe is low during initial winding of a winding machine in the prior art is solved, and the pipe production quality can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic material molding, and in particular relates to a spiral winding molding machine. Background Art

[0002] Plastic winding pipes, also known as composite winding pipes, are composed of an internal plastic core pipe and an external winding layer. Compared with cast iron pipes, cement pipes and other materials, plastic winding pipes have the advantages of low cost, light weight, excellent physical properties, and no need for mold production. In addition, old pipes can be recycled and crushed and reused in the production of plastic core pipes, which is more environmentally friendly.

[0003] The production equipment for plastic winding pipes is a spiral winding forming machine, which uses spiral winding to process the product. It mainly includes a frame and a rotating frame rotatably connected to the frame, and a belt reel (such as rubber belt, fiber belt, etc.) is provided on the rotating frame. When working, the plastic core tube is transported forward along the central axis of the rotating frame, and the rotating frame drives the belt reel on it to rotate and simultaneously releases the reinforced belt on the belt reel, so that the belt is wound around the plastic core tube in a spiral manner. According to needs, the belt can be wound in multiple layers, and different materials can be wound in layers. The spiral forming winding machine can be used to produce products such as "glass fiber reinforced resin winding pipe", "PE winding pipe", "PVC winding pipe", "polyurethane fiber winding pipe", etc.

[0004] In the production of composite pipes, in order to ensure the bonding quality between each layer or different strips, there is a process method in the prior art that heats the winding surface of the strip (i.e., the side used to fit the pipe) to make it in a molten state to improve the bonding strength of the winding layer. However, this method can only heat the wound strip. When the first layer of strip is wound, the strip contacts the outer surface of the core tube. If the temperature of the core tube is low, it will also lead to poor bonding strength. Summary of the invention

[0005] The invention provides a spiral winding forming machine, aiming to solve the problem in the prior art that the temperature of the core tube in the initial winding of the pipe winding forming machine is low, resulting in poor bonding strength of the winding layer.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a spiral winding forming machine, including a frame, a pipe heating component, a rotating component and a winding component. The frame has a feeding channel that runs through along its own axial direction, and a hot air inlet is provided at the top of the feeding channel, and a hot air outlet is provided at the bottom; the pipe heating component includes a hot air mechanism, an air inlet duct and a return air duct, and the hot air mechanism is arranged on the frame, one end of the air inlet duct is connected to the air outlet side of the hot air mechanism, and the other end is connected to the hot air inlet, and one end of the return air duct is connected to the air inlet side of the hot air mechanism, and the other end is connected to the hot air outlet; the rotating component includes a rotating frame and a first driving mechanism, and the rotating frame is rotatably matched with the frame and is coaxially arranged with the feeding channel, and the first driving mechanism is used to drive the rotating frame to rotate around its own axis; the winding component includes a mounting plate, and a unwinding tape reel and a tape heating mechanism respectively arranged on the mounting plate, and the mounting plate is connected to the rotating frame.

[0007] In a possible implementation, a plurality of the winding assemblies are provided, and the plurality of the winding assemblies are spaced apart along the circumference of the rotating frame.

[0008] In a possible implementation, the strip heating mechanism includes: a first heating plate, which is arranged on the mounting plate and has a first heating surface facing upward; and two second heating plates, which are arranged on both sides of the first heating plate and are rotatably connected to the first heating plate through a damping shaft, and the second heating plates have a second heating surface facing upward.

[0009] In one possible implementation, the winding assembly also includes a tension adjustment mechanism, which includes: a slider slidably engaged with the mounting plate; a tension adjustment shaft rotatably disposed on the slider, and the tape of the unwinding reel is wound around the tension adjustment shaft; and a telescopic mechanism disposed on the mounting plate, for driving the slider to reciprocate in a direction intersecting with the tape conveying direction.

[0010] In a possible implementation, a force sensor is coaxially mounted on the tension adjustment shaft.

[0011] In a possible implementation, the spiral winding machine also includes a scoring assembly, which includes: a mounting cylinder, which is arranged on the side of the frame away from the rotating frame, and the mounting cylinder is coaxially arranged with the feeding channel; a first mounting ring, which is coaxially arranged in the mounting cylinder; a plurality of scoring mechanisms, which are circumferentially evenly spaced on the first mounting ring; and a second driving mechanism, which is arranged on the mounting cylinder and is used to drive the first mounting ring to rotate around its own axis.

[0012] In a possible implementation, a filter is provided in the return air duct, and the filter is drawable.

[0013] In a possible implementation, the second drive mechanism includes a plurality of first drive wheels which are arranged at intervals along the circumference of the mounting tube, wherein the rotation axis of the first drive wheels is parallel to the axial direction of the mounting tube, at least one of the first drive wheels is a driving wheel, and the first mounting ring is arranged in a space enclosed by the plurality of first drive wheels, and an outer wall of the first mounting ring is in contact with and cooperates with an outer wall of the first drive wheel.

[0014] In a possible implementation, the spiral winding forming machine also includes a compaction assembly, which includes: a mounting bracket, which is arranged on a side of the rotating frame away from the frame, and the mounting bracket has a pipe passage passing through it; a plurality of second drive wheels, which are arranged at intervals along the circumference of the mounting bracket, and at least one of the second drive wheels is a driving wheel; a second mounting ring, which is arranged in a space enclosed by the plurality of second drive wheels, and the outer wall of the second mounting ring is in contact with the outer wall of the second drive wheel; and a plurality of pressure rollers, which are arranged along the circumference of the second mounting ring, and the rotation axis of the pressure rollers is parallel to the pipe passage.

[0015] In a possible implementation, the hot air mechanism includes an electric heater and a blower, the air outlet end of the blower is connected to the air inlet duct, the air inlet end of the blower is connected to the return air duct, and the electric heater is arranged in the air inlet duct.

[0016] Compared with the prior art, the spiral winding forming machine provided by the present invention has the following beneficial effects: The spiral winding forming machine provided by the present invention comprises a frame, a pipe heating assembly, a rotating assembly and a winding assembly. The frame is formed with a feeding channel, a hot air inlet is provided at the top of the feeding channel, and a hot air outlet is provided at the bottom. During the pipe winding forming, the core tube passes through the feeding channel under the traction of the traction device, the rotating frame drives the winding assembly to rotate, and the unwinding reel releases the tape synchronously, so that the tape (such as rubber sheet / tape, fiber tape lamp) used to form the winding layer is wound around the outer periphery of the pipe in a spiral manner. In order to improve the bonding strength of the winding layer, on the one hand, the present invention is provided with a pipe heating assembly on the frame, which can form hot air passing through the feeding channel from top to bottom to preheat the core tube. On the other hand, the present invention is provided with a tape heating mechanism on the mounting plate, which can heat the winding surface of the tape. The pipe heating assembly and the tape heating mechanism work together to improve the bonding strength between the tape and the core tube, solve the problem that the bonding strength of the winding layer is poor due to the low temperature of the core tube in the winding machine in the prior art during the initial winding, and help to improve the production quality of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure diagram of the spiral winding forming machine provided by the present invention is as follows Figure 1 ; Figure 2 A schematic structural diagram of a strip heating mechanism provided by the present invention; Figure 3 The structure diagram of the spiral winding forming machine provided by the present invention is as follows Figure 2 ; Figure 4 The structure diagram of the spiral winding forming machine provided by the present invention is as follows Figure 3 ; Figure 5 is a schematic diagram of the structure of the scoring component; Figure 6 is a schematic diagram of the structure of the compaction component; Figure 7 This is an internal cross-sectional view of the spiral winding forming machine provided by the present invention.

[0018] Description of reference numerals: 1. Spiral winding machine; 10. Frame; 11. Hot air inlet; 12. Hot air outlet; 20. Pipe heating assembly; 21. Hot air mechanism; 22. Air inlet duct; 23. Return air duct; 30. Rotating frame; 40. Winding assembly; 41. Mounting plate; 42. Unwinding reel; 43. Strip heating mechanism; 431. First heating plate; 432. Second heating plate; 44. Tension adjustment mechanism; 441. Slider; 442. Tension adjustment shaft; 443. Telescopic mechanism; 50. Notching assembly; 51. Mounting cylinder; 52. First mounting ring; 53. Notching mechanism; 54. Second driving mechanism; 60. Compacting assembly; 61. Mounting bracket; 62. Second driving wheel; 63. Second mounting ring; 64. Pressing roller; 70. Pipe; 80. Strip; DETAILED DESCRIPTION In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0020] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0021] Please also read Figures 1 to 7 , the spiral winding forming machine 1 provided in an embodiment of the present invention is described below.

[0022] See also Figure 1 , Figure 3 , Figure 4 and Figure 7 The embodiment of the present invention provides a spiral winding forming machine 1, which includes a frame 10, a pipe heating assembly 20, a rotating assembly and a winding assembly 40. The frame 10 has a feeding channel that runs through along its own axial direction, and a hot air inlet 11 is provided at the top of the feeding channel, and a hot air outlet 12 is provided at the bottom; the pipe heating assembly 20 includes a hot air mechanism 21, an air inlet duct 22 and a return air duct 23, the hot air mechanism 21 is arranged on the frame 10, the air inlet duct 22 is connected to the hot air mechanism 21 and the hot air inlet 11, and the return air duct 23 is connected to the hot air mechanism 21 and the hot air outlet 12; the rotating assembly includes a rotating frame 30 and a first driving mechanism, the rotating frame 30 is rotatably matched with the frame 10, and is coaxially arranged with the feeding channel, and the first driving mechanism is used to drive the rotating frame 30 to rotate around its own axis; the winding assembly 40 includes a mounting plate 41, and a reel 42 and a strip heating mechanism 43 respectively arranged on the mounting plate 41, and the mounting plate 41 is connected to the rotating frame 30.

[0023] Compared with the prior art, the spiral winding forming machine 1 provided in the embodiment of the present invention has the following beneficial effects: The spiral winding forming machine 1 provided in an embodiment of the present invention includes a frame 10, a pipe heating component 20, a rotating component and a winding component 40. The frame 10 is formed with a feeding channel, a hot air inlet 11 is provided at the top of the feeding channel, and a hot air outlet 12 is provided at the bottom. During the winding forming of the pipe 70, the core pipe passes through the feeding channel under the traction of the traction equipment, the rotating frame 30 drives the winding component 40 to rotate, and the unwinding reel 42 releases the tape synchronously, so that the tape 80 (such as a rubber sheet / tape, a fiber tape lamp) used to form the winding layer is wound around the outer periphery of the pipe 70 in a spiral manner.

[0024] In order to improve the bonding strength of the winding layer, on the one hand, the embodiment of the present invention is provided with a pipe heating assembly 20 on the frame 10, which can form hot air passing through the feeding channel from top to bottom to preheat the core tube. On the other hand, the embodiment of the present invention is provided with a strip heating mechanism 43 on the mounting plate 41, which can heat the winding surface of the strip. The pipe heating assembly 20 and the strip heating mechanism 43 work together to improve the bonding strength between the strip and the core tube, solving the problem that the winding machine in the prior art has poor bonding strength of the winding layer due to the low temperature of the core tube during the initial winding, which helps to improve the production quality of the pipe.

[0025] In the embodiment of the present invention, the frame 10 has a feeding channel running through its own axial direction for allowing the pipe to pass through. The bottom of the feeding channel is connected to the air inlet duct 22 through the hot air inlet 11, and the bottom of the feeding channel is connected to the return air duct 23 through the hot air outlet 12. The circulating hot air is used to preheat the outer surface of the pipe (i.e., the core pipe) to improve the bonding strength after the strip is wound.

[0026] In order to realize the conveying of pipes, roller conveyors, traction machines and other equipment can be used to make the pipes pass through the feeding channel at a uniform speed. The conveying or traction equipment of pipes is a mature product in the prior art, and its specific structure and working principle will not be described in detail. Users can choose according to their needs.

[0027] In order to avoid excessive heat loss, the diameter of the feeding channel should not be too large, and it is sufficient to ensure that the pipe can pass smoothly. Of course, in actual production, a piece of machinery may produce pipes of different diameters. In order to adapt to pipes of different diameters, the diameter of the feeding channel should ensure that the pipe with the largest diameter can pass smoothly. In this way, when producing small-diameter pipes, a large gap will be formed between the feeding channel and the pipe. At this time, in order to reduce heat loss, thermal insulation protective plates, protective curtains, etc. can be set on the inlet and outlet sides of the feeding channel.

[0028] The pipe heating assembly 20 includes a hot air mechanism 21, an air inlet duct 22 and an air return duct 23, which can generate hot air of a certain temperature and can deliver the hot air to the feeding channel to heat the outer wall of the pipe. There is no limit on the specific temperature of the hot air, and the user can adjust it between 150-300°C according to factors such as the material, delivery speed, and wall thickness of the pipe. When the wall thickness of the pipe is thin, the temperature should not be too high, otherwise it is easy to cause the pipe to deform due to heat.

[0029] The rotating assembly includes a rotating frame 30 and a first driving mechanism, which can be a rotating power device such as a motor, a hydraulic rotary motor, etc., which can drive the rotating frame 30 to rotate at a certain speed. The specific transmission form can be gear transmission, chain transmission, belt transmission, etc.

[0030] The winding assembly 40 includes a mounting plate 41 mounted on the rotating frame 30, and an unwinding reel 42 and a strip heating mechanism 43 arranged on the mounting plate 41. The unwinding reel 42 can actively release the strip during the operation of the winding assembly 40, so that the strip is spirally wound on the outer wall of the pipe. The strip heating mechanism 43 can be an electric heating plate, a hot air blower, etc., which can heat the winding surface of the strip to soften or melt the winding surface and improve the bonding strength after winding. The strip wound on the unwinding reel 42 can be made of rubber, fiber or other materials that can enhance the physical properties of the pipe.

[0031] See also Figure 1 , Figure 3 and Figure 4 In some possible embodiments, a plurality of winding assemblies 40 are provided, and the plurality of winding assemblies 40 are arranged at intervals along the circumference of the rotating frame 30. When the plurality of winding assemblies 40 work simultaneously, multiple winding layers can be formed on the pipe.

[0032] See also Figure 1 and Figure 2 In some possible embodiments, the strip heating mechanism 43 includes a first heating plate 431 and a second heating plate 432. The first heating plate 431 is disposed on the mounting plate 41 and has a first heating surface facing upward; two second heating plates 432 are disposed oppositely on both sides of the first heating plate 431 and are rotationally connected to the first heating plate 431 through a damping shaft, and the second heating plates 432 have a second heating surface facing upward.

[0033] In this embodiment, the first heating plate 431 and the second heating plate 432 are respectively electric heating plates, and the first heating plate 431 and the second heating plate 432 are long strips along the conveying direction of the strip, and the heating surface is arranged upward, and the strip passes through the first heating plate 431 and the second heating plate 432 from above. In this embodiment, the two second heating plates 432 are respectively arranged on both sides of the first heating plate 431, and are rotatably arranged, and can form heating areas of different widths together with the first heating plate 431, so as to adapt to strips of different widths, and avoid unnecessary heat loss when the strip width is less than the sum of the widths of the first heating plate 431 and the second heating plate 432.

[0034] See also Figure 1 and Figure 3 In some possible embodiments, the winding assembly 40 further includes a tension adjustment mechanism 44, which includes a slider 441, a tension adjustment shaft 442, and a telescopic mechanism 443. The slider 441 is slidably matched with the mounting plate 41; the tension adjustment shaft 442 is rotatably arranged on the slider 441, and the tape of the unwinding reel 42 is wound around the tension adjustment shaft 442; the telescopic mechanism 443 is arranged on the mounting plate 41, and is used to drive the slider 441 to reciprocate in a direction intersecting the tape conveying direction.

[0035] In this embodiment, the tension adjustment mechanism 44 is used to adjust the tension of the strip so that the strip is kept in a tensioned state when wound around the pipe, thereby ensuring the winding quality and preventing the strip from contacting and burning with the strip heating mechanism 43 below.

[0036] The tension adjustment mechanism 44 includes a slider 441, a tension adjustment shaft 442 and a telescopic mechanism 443. A slide groove may be provided on the mounting plate 41, and the slider 441 is slidably fitted in the slide groove. Under the drive of the telescopic mechanism 443, the slider 441 can drive the tension adjustment shaft 442 to move, so that the strip maintains a suitable tension. The telescopic mechanism 443 may be an electric telescopic rod, a pneumatic telescopic rod, etc.

[0037] Since the strip material has a stronger ability to deform thermally after being heated, in order to avoid irreversible deformation of the strip material due to excessive tension, the tension needs to be monitored. In order to achieve tension monitoring, in some possible embodiments, a force sensor is coaxially installed on the tension adjustment shaft 442, and the force sensor is used to monitor the force applied to the tension adjustment shaft 442, thereby indirectly determining the tension of the strip material. The force sensor can be a patch type, a beam type, or other structural forms, and products with existing specifications and models on the market can be directly selected.

[0038] Considering that in addition to temperature, another important factor affecting the bonding strength between the strip and the tube is surface roughness, a tube with a suitable surface roughness is more conducive to the adhesion of the strip. However, in real life, the tube is limited by the characteristics of the material itself, and the surface is usually smooth and the roughness is small, which is not conducive to the adhesion of the tube. In order to further improve the winding adhesion quality of the strip, please refer to Figure 3 and Figure 5 In some possible embodiments, the spiral winding machine 1 further includes a notching assembly 50, which includes a mounting cylinder 51, a first mounting ring 52, a plurality of notching mechanisms 53, and a second driving mechanism 54. The mounting cylinder 51 is disposed on a side of the frame 10 away from the rotating frame 30, and the mounting cylinder 51 is coaxially disposed with the feeding channel; the first mounting ring 52 is coaxially disposed in the mounting cylinder 51; a plurality of notching mechanisms 53 are equidistantly disposed on the first mounting ring 52 along the circumferential direction; and the second driving mechanism 54 is disposed on the mounting cylinder 51, and is used to drive the first mounting ring 52 to rotate around its own axis.

[0039] In this embodiment, the scoring assembly 50 includes a mounting tube 51, a first mounting ring 52, a scoring mechanism 53 and a second driving mechanism 54. The mounting tube 51 is cylindrical and fixedly mounted on the frame 10. The first mounting ring 52 is rotatably mounted in the mounting tube 51. The second driving mechanism 54 is used to drive the first mounting ring 52 to rotate, thereby driving the scoring mechanism 53 to rotate, and scoring the entire outer circumference of the pipe to increase the surface roughness of the pipe and improve the bonding strength.

[0040] The second driving mechanism 54 may be a motor gear mechanism, a pulley mechanism, etc., which is transmission-connected to the first mounting ring 52. The scoring mechanism 53 may be a non-contact structure, such as a laser generator, which uses laser to etch lines on the outer wall of the tube to improve its surface roughness. It may also be a contact structure, such as a sharp tool, which uses metal cutting force to cut lines on the outer wall of the tube.

[0041] In order to adapt to pipes of different diameters, the second driving mechanism 54 can adjust its radial position through a radial adjustment unit. The radial adjustment unit can be a screw rod, an electric telescopic rod, etc., which are arranged radially along the first mounting ring 52.

[0042] In this embodiment, the notching mechanism 53 is located on the feed side of the feeding channel, and debris of the pipe may remain on the surface of the pipe after notching. The debris adhered to the pipe will be blown away with the hot air when passing through the hot air inlet 11 and the hot air outlet 12, and will not affect the subsequent winding and adhesion of the strip. In order to avoid excessive accumulation of debris affecting the normal operation of the hot air mechanism 21, in some possible embodiments, a filter screen is provided in the return air duct 23, and the filter screen can be pulled out. The filter screen can be a single-layer or multi-layer metal mesh for collecting debris. The filter screen can be pulled out to facilitate cleaning and avoid blockage caused by excessive debris.

[0043] See also Figure 5 In some possible embodiments, the second driving mechanism 54 includes a plurality of first driving wheels, which are arranged at intervals along the circumference of the mounting tube 51, and the rotation axis of the first driving wheel is parallel to the axial direction of the mounting tube 51. At least one first driving wheel is a driving wheel, and the first mounting ring 52 is arranged in a space enclosed by the plurality of first driving wheels, and the outer wall of the first mounting ring 52 is in contact with the outer wall of the first driving wheel.

[0044] In this embodiment, at least one first driving wheel is driven to rotate by a motor, and other first driving wheels serve as driven wheels to support the first mounting ring 52. When the first driving wheel rotates, the first mounting ring 52 can be driven to rotate by friction.

[0045] See also Figure 1 , Figure 3 , Figure 4 and Figure 6In some possible embodiments, the spiral winding forming machine 1 further includes a compacting assembly 60, which includes a mounting bracket 61, a second driving wheel 62, a second mounting ring 63 and a pressure roller 64. The mounting bracket 61 is arranged on the side of the rotating frame 30 away from the frame 10, and the mounting bracket 61 has a pipe-through passage; a plurality of second driving wheels 62 are arranged at intervals along the circumference of the mounting bracket 61, and at least one second driving wheel 62 is a driving wheel; the second mounting ring 63 is arranged in a space enclosed by the plurality of second driving wheels 62, and the outer wall of the second mounting ring 63 is in contact with the outer wall of the second driving wheel 62; a plurality of pressure rollers 64 are arranged along the circumference of the second mounting ring 63, and the rotation axis of the pressure roller 64 is parallel to the pipe-through passage.

[0046] In this embodiment, the compaction assembly 60 is used to further compact the strip wound on the pipe, improve the winding effect, and ensure tight winding. The compaction mechanism includes a mounting bracket 61, a second driving wheel 62, a second mounting ring 63 and a pressure roller 64. The mounting bracket 61 can be connected to the frame 10 or directly fixed on the ground. At least one second driving wheel 62 is driven to rotate by a motor. When the second driving wheel 62 rotates, the friction force can be used to drive the second mounting ring 63 to rotate, so that the pressure roller 64 rotates around the circumference of the pipe to further compact the wound strip.

[0047] The outer peripheral surface of the pressure roller 64 can be covered with rubber. The rubber material is wear-resistant and elastic, and is not likely to cause damage to the winding layer.

[0048] In some possible embodiments, the hot air mechanism 21 includes an electric heater and an air blower, the air outlet of the air blower is connected to the air inlet duct 22, the air inlet of the air blower is connected to the return air duct 23, and the electric heater is arranged in the air inlet duct 22. It can be understood that the various parts in the above embodiments can be freely combined or deleted to form different combination embodiments, and the specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the specification of the present invention has recorded various combination embodiments and can support different combination embodiments.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spiral winding machine, characterized in that: include: The frame has a feeding channel that penetrates along its axial direction, and a hot air inlet is opened at the top of the feeding channel and a hot air outlet is opened at the bottom; The pipe heating assembly comprises a hot air mechanism, an air inlet duct and a return air duct, wherein the hot air mechanism is arranged on the frame, one end of the air inlet duct is connected to the air outlet side of the hot air mechanism, and the other end is connected to the hot air inlet, and one end of the return air duct is connected to the air inlet side of the hot air mechanism, and the other end is connected to the hot air outlet; A rotating assembly, comprising a rotating frame and a first driving mechanism, wherein the rotating frame is rotationally matched with the frame and is coaxially arranged with the feeding channel, and the first driving mechanism is used to drive the rotating frame to rotate around its own axis; and The winding assembly comprises a mounting plate, and an unwinding reel and a strip heating mechanism respectively arranged on the mounting plate, and the mounting plate is connected to the rotating frame.

2. The spiral winding machine according to claim 1, characterized in that: A plurality of winding assemblies are provided, and the plurality of winding assemblies are arranged at intervals along the circumference of the rotating frame.

3. The spiral winding machine according to claim 1, characterized in that: The strip heating mechanism comprises: A first heating plate, disposed on the mounting plate and having a first heating surface facing upward; and Two second heating plates are arranged on both sides of the first heating plate opposite to each other and are rotationally connected to the first heating plate via a damping shaft. The second heating plates have a second heating surface facing upward.

4. The spiral winding machine according to claim 3, characterized in that: The winding assembly also includes a tension adjustment mechanism, and the tension adjustment mechanism includes: A slider, slidably fitted on the mounting plate; a tension adjustment shaft, rotatably disposed on the slider, and the tape of the unwinding reel is wound around the tension adjustment shaft; and The telescopic mechanism is arranged on the mounting plate and is used for driving the slider to reciprocate along a direction intersecting with the conveying direction of the strip.

5. The spiral winding machine according to claim 4, characterized in that: A force sensor is coaxially mounted on the tension adjustment shaft.

6. The spiral winding machine according to claim 1, characterized in that: The spiral winding machine also includes a scoring assembly, which includes: A mounting cylinder is arranged on a side of the frame away from the rotating frame, and the mounting cylinder is coaxially arranged with the feeding channel; A first mounting ring, coaxially disposed in the mounting tube; a plurality of notch mechanisms, arranged at equal intervals along the circumferential direction on the first mounting ring; and The second driving mechanism is arranged on the installation tube and is used to drive the first installation to rotate around its own axis.

7. The spiral winding machine according to claim 6, characterized in that: A filter is arranged in the return air duct, and the filter can be pulled out.

8. The spiral winding machine according to claim 6, characterized in that: The second driving mechanism includes a plurality of first driving wheels which are arranged at intervals along the circumference of the mounting tube, wherein the rotation axis of the first driving wheels is parallel to the axial direction of the mounting tube, at least one of the first driving wheels is a driving wheel, and the first mounting ring is arranged in a space enclosed by the plurality of the first driving wheels, and an outer wall of the first mounting ring is in contact with and cooperates with an outer wall of the first driving wheel.

9. The spiral winding machine according to claim 1, characterized in that: The spiral winding machine also includes a compacting assembly, which includes: A mounting bracket is arranged on a side of the rotating frame away from the frame, and the mounting bracket has a pipe-through passage passing therethrough; A plurality of second driving wheels are arranged at intervals along the circumference of the mounting bracket, at least one of the second driving wheels is a driving wheel; A second mounting ring is disposed in a space enclosed by the plurality of second driving wheels, wherein an outer wall of the second mounting ring contacts and cooperates with an outer wall of the second driving wheel; and A plurality of pressure rollers are arranged along the circumference of the second mounting ring, and the rotation axes of the pressure rollers are parallel to the pipe-threading channel.

10. The spiral winding machine according to claim 1, characterized in that: The hot air mechanism comprises an electric heater and an air blower, the air outlet end of the air blower is connected to the air inlet duct, the air inlet end of the air blower is connected to the return air duct, and the electric heater is arranged in the air inlet duct.

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