Composite pipe production line

Abstract

The invention relates to the field of composite pipe production equipment, in particular to a composite pipe production line which comprises a machine base, a core mold and a yarn supply device, the core mold is rotationally connected to the surface of the machine base, a steel belt is wound on the peripheral face of the core mold, a feeding opening is formed in the surface, facing the core mold, of the machine base, and glass fibers are poured on the peripheral face of the steel belt through the feeding opening; the yarn supply device comprises a guide plate and a tensioning assembly, the tensioning assembly is used for placing the yarn drum and controlling the tension degree of winding yarn pulled out by the yarn drum, the guide plate is connected to the surface of the machine base, and a plurality of guide holes allowing the winding yarn to penetrate are formed in the plate face of the guide plate at intervals; winding yarn on the yarn drum is controlled by the tensioning assembly to be tensioned, and then glass fibers are wound on the peripheral face of the steel belt through the guide hole. Through the arrangement of the guide plate and the tensioning assembly, it is guaranteed that the winding yarn on the adjacent yarn drums is not prone to being knotted or wound, glass fibers of the composite pipeline are evenly distributed, it is guaranteed that the deviation of the wall thickness of the composite pipeline meets the design value, and therefore the production quality of the composite pipeline is improved.

Description

Technical Field

[0001] This application relates to the field of composite pipe production equipment, and more particularly to a composite pipe production line. Background Technology

[0002] Fiberglass pipes are lightweight, high-strength, and corrosion-resistant composite pipes. According to the process requirements, steel strips are first wound around a rotating mandrel, and then glass fibers with resin matrix weight are wound layer by layer around the outer circumference of the steel strip through winding yarn. Quartz sand is then laid between the glass fibers as a structural layer, which improves the rigidity of the composite pipe while meeting the strength requirements, and ensures the stability and reliability of the composite pipe.

[0003] When the winding yarn on multiple yarn bobbins is wound alternately around the outer circumference of the steel strip, the winding yarn on adjacent yarn bobbins is prone to knotting or tangling, resulting in local glass fiber accumulation in the composite pipe. This causes the wall thickness deviation of the composite pipe to exceed the design value, thereby reducing the production quality of the composite pipe. Summary of the Invention

[0004] To improve the production quality of composite pipes, this application provides a composite pipe production line.

[0005] This application provides a composite pipe production line, which adopts the following technical solution: A composite tube production line includes a base, a mandrel, and a yarn feeding device. The mandrel is rotatably connected to the surface of the base, and a steel strip is wound around its outer circumference. The base has a feed inlet facing the mandrel, through which glass fiber is poured onto the outer circumference of the steel strip. The yarn feeding device includes a guide plate and a tensioning assembly. The tensioning assembly places the yarn bobbin and controls the tension of the wound yarn pulled from the bobbin. The guide plate is connected to the surface of the base, and its surface has multiple guide holes spaced apart for the winding yarn to pass through. After being tensioned by the tensioning assembly, the winding yarn on the bobbin winds the glass fiber around the outer circumference of the steel strip through the guide holes.

[0006] By adopting the above technical solution, the mandrel rotates on the machine base surface and drives the steel strip to wind around the outer circumference of the mandrel. Glass fiber is poured onto the outer circumference of the steel strip through the feed port. At the same time, the winding yarn on the yarn bobbin is tensioned by the tensioning component and then winds the glass fiber around the outer circumference of the steel strip through the guide hole. This ensures that the winding yarn on adjacent yarn bobbins is not prone to knotting or tangling, so that the glass fiber in the composite pipe is evenly distributed and the wall thickness deviation of the composite pipe meets the design value, thereby improving the production quality of the composite pipe.

[0007] Optionally, a winding assembly is also included, comprising a fixed base, a transmission plate, a guide seat, multiple guide wheels, and multiple adjusting wheels. The transmission plate is connected to the surface of the machine base, and a guide cavity for the steel strip to slide is formed on the outer circumferential surface of the transmission plate. The fixed base is connected to the surface of the machine base, and the multiple adjusting wheels are rotatably connected to the surface of the fixed base at intervals. The inclination height of the rotation axis of the adjusting wheel decreases as the distance to the mandrel decreases. The guide seat is connected to the surface of the machine base, and the multiple guide wheels are rotatably connected to the surface of the guide seat at intervals. The axis of the guide wheel is parallel to the height direction of the machine base. The guide steel strip end face of the inner wall of the guide cavity rolls in contact with the wheel surface of the guide wheel. The guide steel strip end face of the guide wheel rolls in contact with the wheel surface of the adjusting wheel. The guide steel strip end face of the adjusting wheel is wound around the outer circumferential surface of the mandrel.

[0008] By adopting the above technical solution, the end face of the guide steel strip on the inner wall of the guide cavity rolls into contact with the wheel surface of the guide wheel, and rolling friction replaces sliding friction, reducing wear on the steel strip. The end face of the guide steel strip on the wheel surface of the guide wheel rolls into contact with the wheel surface of the adjusting wheel. The tilt height of the axis of rotation of the adjusting wheel decreases as the distance to the mandrel decreases. The end face of the guide steel strip on the wheel surface of the adjusting wheel is wound around the outer circumference of the mandrel, realizing stable winding of the steel strip on the mandrel.

[0009] Optionally, a sealing assembly is also included, comprising a sealing seat, a positioning roller, a positioning base, and multiple positioning rods. The sealing seat is connected to the surface of the machine base near the fixed base. The end of the positioning roller is connected to the surface of the sealing seat. The axis of the positioning roller is parallel to the axis of the mandrel. The end of the positioning roller is coaxially fitted with a polyester film sleeve. The positioning base is connected to the surface of the machine base. The positioning base is located between the sealing seat and the mandrel, and between the fixed base and the feed inlet. Multiple positioning rods are spaced apart and connected to the surface of the positioning base. The axis of the positioning rod is parallel to the axis of the mandrel. Multiple positioning rods allow the polyester film to pass through and be kept taut. The end of the polyester film on the polyester film sleeve passes through multiple positioning rods in sequence and then wraps around the outer circumference of the steel strip to form a seal.

[0010] By adopting the above technical solution, the positioning seat is located between the fixed seat and the feed port. When the steel strip is wound around the outer circumference of the core mold and the glass fiber is poured onto the outer circumference of the steel strip, the polyester film sleeve is coaxially sleeved on the end of the positioning roller. The end of the polyester film on the polyester film sleeve passes through multiple positioning rods in sequence and then winds around the outer circumference of the steel strip to form a seal. This prevents the resin carried in the glass fiber from embedding into the steel strip and solidifying, causing blockage. It also prevents equipment jamming or steel strip breakage and other malfunctions, thereby ensuring the stability of composite pipe production.

[0011] Optionally, there are two feed inlets and two yarn feeding devices. The feed inlets are arranged in a direction parallel to the core mold axis. Each feed inlet corresponds to one yarn feeding device. The feed inlet furthest from the sealing component is used for quartz sand pouring.

[0012] By adopting the above technical solution, glass fiber is poured onto the outer periphery of the polyester film through the inlet near the sealing component, and the winding yarn wraps and fixes the glass fiber onto the outer periphery of the polyester film to form an inner lining layer. Quartz sand and resin are poured onto the outer periphery of the polyester film through the inlet away from the sealing component to form a structural layer, thereby improving the structural strength of the composite pipe and extending its service life.

[0013] Optionally, a forming assembly is also included, comprising a forming seat, a forming roller, a guide seat, and multiple guide rods. The forming seat is connected to the surface of the machine base. One end of the forming roller is connected to the surface of the forming seat, and the other end of the forming roller is coaxially fitted with a mesh fabric sleeve. The axis of the forming roller and the axis of the mandrel are parallel to each other. The guide seat is connected to the surface of the machine base. Two feed ports are located between the guide seat and the positioning seat, and the guide seat is located between the forming seat and the mandrel. Multiple guide rods are spaced apart and connected to the surface of the guide seat. The axes of the guide rods and the axes of the mandrel are parallel to each other. The mesh fabric passes through the multiple guide rods and is kept taut. The ends of the mesh fabric on the mesh fabric sleeve pass through the multiple guide rods in sequence and are wound around the outer periphery of the polyester film.

[0014] By adopting the above technical solution, the two feed ports are located between the guide seat and the positioning seat. When the winding yarn wraps the quartz sand around the outer periphery of the polyester film, the end of the mesh cloth on the mesh cloth sleeve passes through multiple guide rods in sequence and is wound around the outer periphery of the polyester film to form a structural layer, realizing the multi-layer overlapping structure of the composite pipe. At the same time, the guide rods adjust the tension of the mesh cloth to maintain the fit between the structural layers and avoid gaps, thereby further improving the production quality of the composite pipe.

[0015] Optionally, it also includes a thermosetting assembly, which includes a curing seat and multiple heating lamps. The curing seat is connected to the surface of the base and is located on the side of the guide seat away from the feed port. The surface of the curing seat facing the core mold has a heating surface. The heating surface is an arc surface and the center line of the heating surface faces the core mold. Multiple heating lamps are connected at intervals on the heating surface. The heating lamps emit light and heat and cure the resin on the core mold.

[0016] By adopting the above technical solution, the centerline of the heating surface faces the core mold, and multiple heating lamps are connected at intervals on the heating surface. The heating lamps emit light and heat and cure the resin on the core mold, achieving uniform heating from the inside out, thereby improving the production efficiency of composite tubes.

[0017] Optionally, the yarn feeding device further includes a tensioning seat and a plurality of tensioning rollers. The tensioning seat is connected to the surface of the machine base and is located between the feed inlet and the guide plate. The plurality of tensioning rollers are spaced apart and connected to the surface of the tensioning seat. The axis of the tensioning rollers is parallel to the axis of the mandrel. The plurality of tensioning rollers allow the winding yarn to pass through and maintain tension.

[0018] By adopting the above technical solution, the end of the winding yarn on the yarn bobbin is first tensioned by the tensioning assembly, then passes through multiple tensioning rollers in sequence through the guide hole before being wound around the outer periphery of the polyester film. This achieves multiple tension control of the winding yarn, enabling the winding yarn to fit the outer periphery of the polyester film and avoiding gaps, thereby improving the production quality of the composite tube.

[0019] Optionally, the tensioning assembly includes a wire frame, a tensioning plate, multiple guide rollers, and multiple limiting rollers. One end of each limiting roller is spaced apart and connected to the surface of the wire frame. The other end of each limiting roller is coaxially fitted onto a yarn bobbin. The axes of the limiting rollers are parallel to the height direction of the wire frame. The tensioning plate is connected to the surface of the wire frame facing the machine base. The multiple guide rollers are spaced apart and connected to the surface of the tensioning plate. The axes of the guide rollers are parallel to the axis of the mandrel. The multiple guide rollers allow the winding yarn to pass through and maintain tension, then pass through guide holes and multiple tension rollers before being wound onto the outer periphery of the polyester film.

[0020] By adopting the above technical solution, the yarn bobbin is coaxially sleeved on the end of the limiting roller. The end of the winding yarn on the yarn bobbin passes through multiple guide rollers, guide holes and multiple tension rollers in sequence and is then wound around the outer circumference of the polyester film. After two tension adjustments by the guide rollers and tension rollers, the winding yarn on adjacent yarn bobbins is less likely to knot or entangle, ensuring that the glass fiber of the composite pipe is evenly distributed and that the wall thickness deviation of the composite pipe meets the design value, thereby improving the production quality of the composite pipe.

[0021] Optionally, the tensioning plate is rotatably connected to the surface of the thread frame, and the rotation axis of the tensioning plate is parallel to the axis of the mandrel. The tensioning assembly also includes an elastic element, one end of which is connected to the rotation axis of the tensioning plate in the direction of elastic force, and the other end of which is connected to the surface of the thread frame in the direction of elastic force. The elastic element has the elastic force to drive the tensioning plate to rotate away from the mandrel, and the winding yarn between the guide roller and the tensioning roller tends to remain taut.

[0022] By adopting the above technical solution, the elastic element drives the tension plate to rotate towards the wire frame, and the winding yarn between the guide roller and the tension roller remains taut, realizing the third tension adjustment of the winding yarn, so that the winding yarn is tightly compressed and wound on the outer periphery of the polyester film, reducing the residual air bubbles during resin impregnation, thereby further improving the production quality of composite pipes.

[0023] Optionally, an adjustment assembly is connected to the wire frame. The adjustment assembly includes an adjustment rod, a limiting block, and an elastic element two. An arc track for the adjustment rod to slide is formed on the surface of the wire frame. The axis of the arc track coincides with the rotation axis of the tensioning plate. The arc track is located on the side of the tensioning plate near the wire frame. Both ends of the adjustment rod protrude from the surface of the wire frame in the axial direction. One end of the adjustment rod can abut against the surface of the tensioning plate and limit the tensioning plate to be close to the wire frame. The other end of the adjustment rod has a sliding cavity for the limiting block to slide. The sliding direction of the limiting block is parallel to the axis of the adjustment rod. Multiple limiting grooves for the ends of the limiting blocks to be embedded are formed at intervals on the inner wall of the arc track. One end of the elastic element two abuts against the inner wall of the sliding cavity in the elastic direction, and the other end of the elastic element two abuts against the surface of the limiting block. The elastic element two has the tendency to elastically drive the limiting block to be embedded in the limiting groove and limit the adjustment rod to slide on the inner wall of the arc track.

[0024] By adopting the above technical solution, when it is necessary to adjust the rotation area of ​​the tensioning plate, the limiting block is driven to slide away from the limiting groove against the elastic force of the second elastic element. The end of the limiting block is disengaged from the limiting groove, the limiting effect of the adjusting rod in the arc track disappears, and the adjusting rod moves along the inner wall of the arc track to the designated position. The limiting block is released, and the elastic force of the second elastic element drives the limiting block to move closer to the limiting groove and embed it. The surface of the limiting block abuts against the inner wall of the limiting groove and limits the sliding of the adjusting rod in the inner wall of the arc track. At the same time, the elastic force of the first elastic element drives the tensioning plate to rotate closer to the wire frame and abut against the surface of the adjusting rod, thereby achieving precise adjustment of the rotation area of ​​the tensioning plate and avoiding the situation of the wound yarn being over-tensioned and breaking, thus improving the production quality of composite tubes.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The setting of guide plates and tensioning components ensures that the winding yarns on adjacent yarn bobbins are not prone to knotting or tangling, so that the glass fiber of the composite pipe is evenly distributed, and the wall thickness deviation of the composite pipe meets the design value, thereby improving the production quality of the composite pipe. The fixed seat, transmission plate, guide seat, guide wheel and adjusting wheel are set up so that the end face of the steel strip on the wheel surface of the adjusting wheel is wound around the outer circumference of the mandrel to achieve stable winding of the steel strip on the mandrel; The installation of sealing seats, positioning rollers, positioning seats, and positioning rods prevents the resin carried in the glass fiber from embedding into the steel strip and solidifying, causing blockages and avoiding equipment jams or steel strip breakage, thus ensuring the stability of composite pipe production. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the overall structure in an embodiment of this application, mainly showing the sealing component.

[0028] Figure 3 This is a schematic diagram of the overall structure of the wire frame in an embodiment of this application.

[0029] Figure 4 This is a partial cross-sectional view of the wire frame in an embodiment of this application, mainly showing the adjustment components.

[0030] Explanation of reference numerals in the attached drawings: 1. Machine base; 11. Feed inlet; 2. Core mold; 3. Yarn feeding device; 31. Guide plate; 311. Guide hole; 32. Tensioning assembly; 321. Wire frame; 3211. Arc track; 3212. Limiting groove; 322. Tensioning plate; 323. Elastic element one; 324. Guide roller; 325. Limiting roller; 33. Tensioning seat; 34. Tensioning roller; 4. Winding assembly; 41. Fixed seat; 42. Transmission plate; 421. Guide cavity; 43. 44. Guide seat; 45. Guide wheel; 56. Adjusting wheel; 57. Sealing assembly; 58. Sealing seat; 59. Positioning roller; 50. Positioning seat; 51. Positioning rod; 60. Molding assembly; 61. Molding seat; 62. Molding roller; 63. Guide seat; 64. Guide rod; 71. Thermosetting assembly; 72. Curing seat; 73. Heating surface; 74. Heating lamp; 85. Adjusting assembly; 86. Adjusting rod; 87. Sliding cavity; 88. Limiting block; 89. Elastic element II. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a composite pipe production line. (Refer to...) Figure 1 and Figure 2The composite pipe production line includes a base 1, a mandrel 2, a yarn feeding device 3, a winding assembly 4, a sealing assembly 5, a forming assembly 6, and a thermosetting assembly 7. The number of yarn feeding devices 3 can be one, two, or more. In this embodiment, there are two yarn feeding devices 3. The mandrel 2 is rotatably connected to the surface of the base 1. The rotation axis of the mandrel 2 is parallel to the length direction of the base 1. Steel strip is wound around the outer circumference of the mandrel 2. The base 1 is provided with winding stations, sealing stations, yarn feeding stations (one and two), forming stations, and curing stations at intervals along its length. The winding assembly 4 is installed on the surface of the base 1 facing the winding stations. The winding assembly 4 can drive the end of the steel strip to be wound and fixed to the outer circumference of the mandrel 2. The sealing assembly 5 is installed on the surface of the base 1 facing the sealing assembly 5. The sealing component 5 can drive the polyester film to be wound and fixed on the outer periphery of the steel strip to form a seal. One yarn feeding device 3 is installed on the surface of the machine base 1 facing the first yarn feeding station. The yarn feeding device 3 can drive the winding yarn to wind and fix the glass fiber on the outer periphery of the polyester film to form an inner lining layer. The other yarn feeding device 3 is installed on the surface of the machine base 1 facing the second yarn feeding station. The yarn feeding device 3 can drive the winding yarn to wind and fix the quartz sand on the outer periphery of the inner lining layer to form a structural layer. The molding component 6 is installed on the surface of the machine base 1 facing the molding station. The molding component 6 can drive the mesh cloth to be wound and fixed on the outer periphery of the structural layer. The thermosetting component 7 is installed on the surface of the machine base 1 facing the curing station. The thermosetting component 7 can heat and cure the resin on the core mold 2 to realize the automated production molding of the composite pipe.

[0033] Reference Figure 1 and Figure 2 The winding assembly 4 includes a fixed base 41, a transmission plate 42, a guide base 43, multiple guide wheels 44, and multiple adjusting wheels 45. The transmission plate 42 is connected to the surface of the machine base 1 away from the core mold 2. The outer circumferential surface of the transmission plate 42 is provided with a guide cavity 421 for the steel strip to slide. The fixed base 41 is fixed to the surface of the machine base 1 by bolts. Multiple adjusting wheels 45 are rotatably connected to the surface of the fixed base 41 at intervals. The tilt height of the arrangement direction of the adjusting wheels 45 increases as the distance to the core mold 2 decreases, and the tilt height of the rotation axis of the adjusting wheels 45 decreases as the distance to the core mold 2 decreases.

[0034] Reference Figure 1 and Figure 2 The guide seat 43 is fixed to the surface of the base 1 by bolts. In this embodiment, the guide seat 43 is an arc-shaped plate. The axis of the guide seat 43 faces the transmission plate 42. One end of the guide seat 43 in the arc direction faces the cavity opening of the guide cavity 421, and the other end of the guide seat 43 in the arc direction faces the fixed seat 41. Multiple guide wheels 44 are rotatably connected to the surface of the guide seat 43 around the arc direction of the guide seat 43, and the axis of the guide wheel 44 is parallel to the height direction of the base 1.

[0035] Reference Figure 1 and Figure 2The guide steel strip end face on the inner wall of the guide cavity 421 rolls into contact with the wheel surface of the guide wheel 44, the guide steel strip end face on the wheel surface of the guide wheel 44 rolls into contact with the wheel surface of the adjusting wheel 45, and the guide steel strip end face on the wheel surface of the adjusting wheel 45 is wound around the outer circumference of the core mold 2, thereby achieving stable winding of the steel strip on the core mold 2.

[0036] Reference Figure 1 and Figure 2 The sealing assembly 5 includes a sealing seat 51, a positioning roller 52, a positioning seat 53, and multiple positioning rods 54. The sealing seat 51 is fixed on the surface of the machine base 1 near the fixed seat 41. One end of the positioning roller 52 is fixed on the surface of the sealing seat 51, and the other end of the positioning roller 52 is coaxially fitted with a polyester film sleeve. The axis of the positioning roller 52 is parallel to the axis of the core mold 2. The positioning seat 53 is fixed to the surface of the machine base 1 by bolts. The positioning seat 53 is located between the sealing seat 51 and the core mold 2. The ends of the multiple positioning rods 54 are fixed at intervals on the surface of the positioning seat 53. The axes of the positioning rods 54 are parallel to the axes of the positioning roller 52. The multiple positioning rods 54 allow the polyester film to pass through and remain taut.

[0037] Reference Figure 1 and Figure 2 When the steel strip is wound around the outer circumference of the core mold 2 and close to the sealing position, the end of the polyester film on the polyester film sleeve passes through multiple positioning rods 54 to maintain tension and then is wound around the outer circumference of the steel strip to form a seal. This prevents the resin carried in the glass fiber from embedding into the steel strip at the tight point and solidifying, thus reducing the occurrence of equipment jams or steel strip breakage, thereby ensuring the stability of composite pipe production.

[0038] Reference Figure 1 and Figure 2 The machine base 1 has inlets 11 on its top surface facing both yarn feeding stations 1 and 2. The outlets of the inlets 11 face the surface of the mandrel 2. The inlet 11 facing yarn feeding station 1 supplies glass fiber to be poured onto the outer periphery of the polyester film; the inlet 11 facing yarn feeding station 2 supplies quartz sand to be poured onto the outer periphery of the polyester film. The yarn feeding device 3 includes a guide plate 31, a tensioning assembly 32, a tensioning seat 33, and multiple tensioning rollers 34. The tensioning seat 33 is fixed to the surface of the machine base 1 facing the mandrel 2 by bolts, and the multiple tensioning rollers 34 are connected at intervals to the tensioning assembly 32. On the surface of seat 33, the axis of tension roller 34 is parallel to the axis of core mold 2. Multiple tension rollers 34 allow the winding yarn to pass through and be kept taut before being wound around the outer periphery of the polyester film. Guide plate 31 is fixed to the surface of machine base 1 facing core mold 2 by bolts. Multiple guide holes 311 for winding yarn to pass through are spaced apart on the surface of guide plate 31. The axis of guide hole 311 is parallel to the width direction of machine base 1. Guide hole 311 passes through both sides of the thickness direction of guide plate 31 along its own axis. Tension seat 33 is located between guide plate 31 and feed port 11.

[0039] Reference Figure 1 and Figure 3The tensioning assembly 32 includes a wire frame 321, a tensioning plate 322, an elastic element 323, multiple guide rollers 324, and multiple limiting rollers 325. One end of the multiple limiting rollers 325 is spaced apart and connected to the surface of the wire frame 321. The other end of the multiple limiting rollers 325 is coaxially fitted onto the yarn bobbin. The arrangement direction of the limiting rollers 325 is parallel to the length direction of the machine base 1, and the axis of the limiting rollers 325 is parallel to the height direction of the machine base 1.

[0040] Reference Figure 3 and Figure 4 The tensioning plate 322 is rotatably connected to the surface of the frame 321 facing the base 1. The rotation axis of the tensioning plate 322 is parallel to the length direction of the base 1. Multiple guide rollers 324 are spaced apart on the surface of the tensioning plate 322. The axis of the guide rollers 324 is parallel to the axis of the core mold 2. The multiple guide rollers 324 allow the winding yarn to pass through and maintain tension. The elastic element 323 can be a tension spring or a torsion spring. In this embodiment, the elastic element 323 is a torsion spring with a certain deformation capacity. One end of the elastic element 323 in the elastic direction is connected to the rotation axis of the tensioning plate 322, and the other end of the elastic element 323 in the elastic direction is connected to the surface of the frame 321. The elastic element 323 has the elastic force to drive the tensioning plate 322 to rotate towards the frame 321, and the winding yarn between the guide rollers 324 and the tension rollers 34 tends to remain taut.

[0041] Reference Figure 3 and Figure 4 The yarn bobbin is coaxially sleeved at the end of the limiting roller 325. The end of the winding yarn on the yarn bobbin passes through multiple guide rollers 324, guide holes 311 and multiple tension rollers 34 in sequence and is wound around the outer periphery of the polyester film. The elastic element 323 drives the tension plate 322 to rotate towards the wire frame 321 to achieve the first tension adjustment of the winding yarn. After passing through the guide rollers 324 and tension rollers 34 in sequence for two more tension adjustments, the winding yarn is tightly compressed and wound around the outer periphery of the polyester film, reducing the residual air bubbles during resin impregnation, thereby further improving the production quality of the composite tube.

[0042] Reference Figure 3 and Figure 4 The wire frame 321 is equipped with an adjustment component 8, which can adjust the swing area of ​​the tension plate 322. The adjustment component 8 includes an adjustment rod 81, a limit block 82, and an elastic element 83. The surface of the wire frame 321 is provided with an arc track 3211 for the adjustment rod 81 to slide. The axis of the arc track 3211 coincides with the rotation axis of the tension plate 322, and the arc track 3211 is located on the side of the tension plate 322 close to the wire frame 321.

[0043] Reference Figure 3 and Figure 4The axis of the adjusting rod 81 and the rotation axis of the tensioning plate 322 are parallel to each other, and both ends of the adjusting rod 81 protrude from the surface of the wire frame 321. One end of the adjusting rod 81 in the axial direction can abut against the surface of the tensioning plate 322 and limit the tensioning plate 322 to approach the wire frame 321. The other end of the adjusting rod 81 in the axial direction is provided with a sliding cavity 811 for the sliding of the limiting block 82. The sliding direction of the limiting block 82 is parallel to the axis of the adjusting rod 81. Limiting grooves 3212 for the end of the limiting block 82 to be embedded are provided at intervals along the arc direction of the arc 3211. The surface of the limiting block 82 can abut against the inner wall of the limiting groove 3212 and limit the adjusting rod 81 to slide on the inner wall of the arc 3211.

[0044] Reference Figure 3 and Figure 4 The second elastic element 83 can be a compression spring or a tension spring. In this embodiment, the second elastic element 83 is a compression spring, which has a certain deformation capability. The second elastic element 83 is coaxially sleeved on the outer peripheral surface of the adjusting rod 81. One end of the second elastic element 83 in the elastic force direction abuts against the surface of the limiting block 82, and the other end of the second elastic element 83 in the elastic force direction abuts against the inner wall of the sliding cavity 811. The second elastic element 83 has the tendency to drive the limiting block 82 into the limiting groove 3212 and limit the sliding of the adjusting rod 81 on the inner wall of the arc 3211.

[0045] Reference Figure 3 and Figure 4 When it is necessary to adjust the rotation area of ​​the tensioning plate 322, the limiting block 82 is driven to slide away from the limiting groove 3212 against the elastic force of the second elastic element 83. The end of the limiting block 82 is disengaged from the limiting groove 3212, and the limiting effect of the adjusting rod 81 in the arc 3211 disappears. The adjusting rod 81 moves along the inner wall of the arc 3211 to the designated position, and the limiting block 82 is released. The elastic force of the second elastic element 83 drives the limiting block 82 to move closer to the limiting groove 3212 and embed it. The surface of the limiting block 82 abuts against the inner wall of the limiting groove 3212 and limits the sliding of the adjusting rod 81 in the inner wall of the arc 3211. At the same time, the elastic force of the first elastic element 323 drives the tensioning plate 322 to rotate closer to the wire frame 321 and abut against the rod surface of the adjusting rod 81, so as to achieve precise adjustment of the rotation area of ​​the tensioning plate 322, avoid the situation of the wound yarn being over-tensioned and breaking, thereby improving the production quality of composite tubes.

[0046] Reference Figure 1 and Figure 2The molding assembly 6 includes a molding seat 61, a molding roller 62, a guide seat 63, and multiple guide rods 64. The molding seat 61 is fixed to the surface of the machine base 1 by bolts. One end of the molding roller 62 is connected to the surface of the molding seat 61 in the axial direction, and the other end of the molding roller 62 is coaxially fitted with a mesh sleeve. The axis of the molding roller 62 and the axis of the core mold 2 are parallel to each other. The guide seat 63 is fixed to the surface of the machine base 1 by bolts. The guide seat 63 is located between the molding seat 61 and the core mold 2. The ends of the multiple guide rods 64 are connected to the surface of the guide seat 63 at intervals. The axes of the guide rods 64 are parallel to the axis of the core mold 2. The multiple guide rods 64 allow the mesh fabric to pass through and remain taut.

[0047] Reference Figure 1 and Figure 2 When the winding yarn wraps the quartz sand around the outer circumference of the inner lining layer, the ends of the mesh cloth on the mesh cloth sleeve pass through multiple guide rods 64 in sequence and are then wound around the outer circumference of the inner lining layer to form a structural layer, realizing the multi-layer overlapping structure of the composite pipe. At the same time, the guide rods 64 adjust the tension of the mesh cloth to maintain the fit between the structural layers, avoid gaps, and further improve the production quality of the composite pipe.

[0048] Reference Figure 1 and Figure 2 The thermosetting assembly 7 includes a curing seat 71 and multiple heating lamps 72. The curing seat 71 is fixed to the surface of the base 1 by bolts. The surface of the curing seat 71 facing the core mold 2 has a heating surface 711. The heating surface 711 is arc-shaped, and the axis of the heating surface 711 coincides with the axis of the core mold 2. Multiple heating lamps 72 are connected at intervals on the heating surface 711 along the arc 3211 direction of the heating surface 711. The heating lamps 72 emit light and heat and cure the resin on the core mold 2, realizing uniform heating from the inside to the outside, thereby improving the production efficiency of composite tubes.

[0049] The implementation principle of a composite pipe production line according to an embodiment of this application is as follows: the end of the winding yarn on the yarn bobbin passes through multiple guide rollers 324, guide holes 311 and multiple tension rollers 34 in sequence and is then wound around the outer periphery of the polyester film. The elastic element 323 drives the tension plate 322 to rotate towards the wire frame 321, realizing the first tension adjustment of the winding yarn. Then, it passes through the guide rollers 324 and tension rollers 34 in sequence for two more tension adjustments, so that the winding yarn is tightly compressed and wound around the outer periphery of the polyester film, reducing the residual air bubbles during resin impregnation, thereby further improving the production quality of the composite pipe, ensuring that the winding yarn on adjacent yarn bobbins is not prone to knotting or tangling, making the glass fiber of the composite pipe evenly distributed, and ensuring that the wall thickness deviation of the composite pipe meets the design value, thereby improving the production quality of the composite pipe.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composite pipe production line, characterized in that: The machine includes a base (1), a core mold (2), and a yarn feeding device (3). The core mold (2) is rotatably connected to the surface of the base (1). The outer circumference of the core mold (2) is used for winding steel strip. The surface of the base (1) facing the core mold (2) is provided with a feed port (11). Glass fiber is poured onto the outer circumference of the steel strip through the feed port (11). The yarn feeding device (3) includes a guide plate (31) and a tensioning component (32). The tensioning component (32) is used to place the yarn bobbin and control the tension of the winding yarn pulled out of the yarn bobbin. The guide plate (31) is connected to the surface of the base (1). The guide plate (31) has multiple guide holes (311) spaced apart on its surface for the winding yarn to pass through. After the winding yarn on the yarn bobbin is tensioned by the tensioning component (32), the glass fiber is wound onto the outer circumference of the steel strip through the guide holes (311).

2. The composite pipe production line according to claim 1, characterized in that: It also includes a winding assembly (4), which includes a fixed base (41), a transmission plate (42), a guide seat (43), multiple guide wheels (44), and multiple adjusting wheels (45). The transmission plate (42) is connected to the surface of the machine base (1), and a guide cavity (421) for the steel strip to slide is opened on the outer peripheral surface of the transmission plate (42). The fixed base (41) is connected to the surface of the machine base (1), and the multiple adjusting wheels (45) are rotatably connected to the surface of the fixed base (41) at intervals. The tilt height of the rotation axis of the adjusting wheel (45) varies with the rotation height of the steel strip. The distance to the core mold (2) is reduced and the guide seat (43) is connected to the surface of the machine base (1). Multiple guide wheels (44) are rotatably connected to the surface of the guide seat (43) at intervals. The axis of the guide wheel (44) is parallel to the height direction of the machine base (1). The end face of the guide steel strip on the inner wall of the guide cavity (421) is in rolling contact with the wheel surface of the guide wheel (44). The end face of the guide steel strip on the wheel surface of the guide wheel (44) is in rolling contact with the wheel surface of the adjusting wheel (45). The end face of the guide steel strip on the wheel surface of the adjusting wheel (45) is wrapped around the outer circumference of the core mold (2).

3. The composite pipe production line according to claim 2, characterized in that: It also includes a sealing assembly (5), which includes a sealing seat (51), a positioning roller (52), a positioning base (53), and a plurality of positioning rods (54). The sealing seat (51) is connected to the surface of the machine base (1) near the fixed base (41). The end of the positioning roller (52) is connected to the surface of the sealing seat (51). The axis of the positioning roller (52) is parallel to the axis of the core mold (2). The end of the positioning roller (52) is coaxially fitted with a polyester film sleeve. The positioning base (53) is connected to the machine base (1). On the surface, the positioning seat (53) is located between the sealing seat (51) and the core mold (2), and the positioning seat (53) is located between the fixed seat (41) and the feed port (11). A plurality of positioning rods (54) are spaced apart on the surface of the positioning seat (53). The axis of the positioning rod (54) and the axis of the core mold (2) are parallel to each other. The plurality of positioning rods (54) allow the polyester film to pass through and be kept taut. The ends of the polyester film on the polyester film sleeve pass through the plurality of positioning rods (54) in sequence and are then wound around the outer circumference of the steel strip to form a seal.

4. The composite pipe production line according to claim 3, characterized in that: The feed inlet (11) and the yarn supply device (3) are both provided in twos. The arrangement direction of the feed inlet (11) is parallel to the axis of the core mold (2). The feed inlet (11) and the yarn supply device (3) are in one-to-one correspondence. The feed inlet (11) away from the sealing component (5) is used for quartz sand pouring.

5. The composite pipe production line according to claim 4, characterized in that: It also includes a molding assembly (6), which includes a molding seat (61), a molding roller (62), a guide seat (63), and multiple guide rods (64). The molding seat (61) is connected to the surface of the machine base (1). One end of the molding roller (62) is connected to the surface of the molding seat (61), and the other end of the molding roller (62) is coaxially fitted with a mesh fabric sleeve. The axis of the molding roller (62) and the axis of the mandrel (2) are parallel to each other. The guide seat (63) is connected to the surface of the machine base (1). The feed port (11) is located between the guide seat (63) and the positioning seat (53), and the guide seat (63) is located between the forming seat (61) and the core mold (2). A plurality of guide rods (64) are spaced apart on the surface of the guide seat (63). The axis of the guide rod (64) and the axis of the core mold (2) are parallel to each other. The plurality of guide rods (64) allow the mesh cloth to pass through and be kept taut. The ends of the mesh cloth on the mesh cloth sleeve pass through the plurality of guide rods (64) in sequence and are then wound around the outer periphery of the polyester film.

6. The composite pipe production line according to claim 5, characterized in that: It also includes a thermosetting assembly (7), which includes a curing seat (71) and a plurality of heating lamps (72). The curing seat (71) is connected to the surface of the base (1). The curing seat (71) is located on the side of the guide seat (63) away from the feed port (11). The surface of the curing seat (71) facing the core mold (2) is provided with a heating surface (711). The heating surface (711) is an arc surface, and the axis of the heating surface (711) faces the core mold (2). A plurality of heating lamps (72) are connected at intervals on the heating surface (711). The heating lamps (72) emit light and heat and cure the resin on the core mold (2).

7. The composite pipe production line according to claim 3, characterized in that: The yarn feeding device (3) also includes a tensioning seat (33) and a plurality of tensioning rollers (34). The tensioning seat (33) is connected to the surface of the machine base (1). The tensioning seat (33) is located between the feed inlet (11) and the guide plate (31). The plurality of tensioning rollers (34) are spaced apart on the surface of the tensioning seat (33). The axis of the tensioning rollers (34) and the axis of the core mold (2) are parallel to each other. The plurality of tensioning rollers (34) allow the winding yarn to pass through and maintain tension.

8. The composite pipe production line according to claim 7, characterized in that: The tensioning assembly (32) includes a wire frame (321), a tensioning plate (322), multiple guide rollers (324), and multiple limiting rollers (325). One end of each limiting roller (325) is spaced on the surface of the wire frame (321), and the other end of each limiting roller (325) is coaxially fitted with a yarn bobbin. The axis of the limiting roller (325) is parallel to the height direction of the wire frame (321). The tensioning plate (322) is connected to the surface of the wire frame (321) facing the machine base (1). The multiple guide rollers (324) are spaced on the surface of the tensioning plate (322). The axis of the guide rollers (324) is parallel to the axis of the mandrel (2). The multiple guide rollers (324) allow the winding yarn to pass through and maintain tension, and then pass through the guide hole (311) and the multiple tension rollers (34) before being wound onto the outer periphery of the polyester film.

9. The composite pipe production line according to claim 8, characterized in that: The tensioning plate (322) is rotatably connected to the surface of the wire frame (321). The rotation axis of the tensioning plate (322) and the axis of the core mold (2) are parallel to each other. The tensioning assembly (32) also includes an elastic element (323). One end of the elastic element (323) in the elastic direction is connected to the rotation axis of the tensioning plate (322), and the other end of the elastic element (323) in the elastic direction is connected to the surface of the wire frame (321). The elastic element (323) has the elasticity to drive the tensioning plate (322) to rotate away from the core mold (2), and the winding yarn between the guide roller (324) and the tensioning roller (34) maintains a taut tendency.

10. The composite pipe production line according to claim 9, characterized in that: An adjustment assembly (8) is connected to the wire frame (321). The adjustment assembly (8) includes an adjustment rod (81), a limiting block (82), and an elastic element (83). An arc track (3211) for sliding of the adjustment rod (81) is provided on the surface of the wire frame (321). The axis of the arc track (3211) coincides with the rotation axis of the tension plate (322). The arc track (3211) is located on the side of the tension plate (322) closer to the wire frame (321). Both ends of the adjustment rod (81) protrude from the surface of the wire frame (321) in the axial direction. One end of the adjustment rod (81) can abut against the surface of the tension plate (322) and limit the tension plate (322) to be close to the wire frame (321). The other end of the adjusting rod (81) is provided with a sliding cavity (811) for the sliding of the limiting block (82). The sliding direction of the limiting block (82) is parallel to the axis of the adjusting rod (81). The inner wall of the arc track (3211) is provided with a plurality of limiting grooves (3212) for the end of the limiting block (82) to be embedded. One end of the elastic element (83) in the elastic direction abuts against the inner wall of the sliding cavity (811), and the other end of the elastic element (83) in the elastic direction abuts against the surface of the limiting block (82). The elastic element (83) has the tendency to drive the limiting block (82) to be embedded in the limiting groove (3212) and limit the sliding of the adjusting rod (81) on the inner wall of the arc track (3211).

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