Polyolefin plastic-steel reinforced winding pipeline production line and production process

Abstract

The application relates to a polyolefin plastic-steel reinforced winding pipeline production line which comprises a steel strip unwinding mechanism, a plastic melting mechanism, a strip forming mechanism, a cooling mechanism, an adhesive coating mechanism and a winding mechanism, a plurality of sliding blocks are arranged on a fixing disc along the direction vertical to the central axis of the fixing disc, a mounting block is arranged on a mounting disc along the axial direction vertical to the mounting disc, the sliding blocks and the mounting blocks are one-to-one corresponding, mounting shafts are one-to-one corresponding to the sliding blocks, the two ends of the mounting shafts are connected with the sliding blocks and the mounting blocks respectively, a guide roller is coaxially and rotationally arranged on each mounting shaft, a spiral groove is arranged in the side wall of the guide roller, and a strip pressure transferring assembly is used for pressing the steel-plastic composite strip on one of the guide rollers and driving the strip to move. The application can produce plastic-steel winding pipes with different diameters, thereby greatly saving the equipment investment cost.

Description

Technical Field

[0001] This application relates to the technical field of pipe processing, and in particular to a production line and process for polyolefin reinforced steel spiral wound pipes. Background Technology

[0002] Plastic-steel spiral wound pipe is made by spirally winding steel-plastic composite profiled strips and bonding the overlapping surfaces of the strips with molten adhesive. This type of pipe has advantages such as corrosion resistance, light weight, easy installation, large flow capacity, and long service life. It can replace pipes made of high-energy-consuming materials such as cast iron, etc., and is a green product.

[0003] Currently, the production line for PVC-coated spiral wound pipes mainly includes a steel strip unwinding mechanism, a plastic material melting mechanism, a strip forming mechanism, a strip traction mechanism, a cooling mechanism, an adhesive coating mechanism, and a winding mechanism. During production, the steel strip unwinding mechanism unwinds multiple steel strips and transports them to the strip forming mechanism. The plastic material melting mechanism melts the polyolefin plastic and transports it to the strip forming mechanism. At the strip forming mechanism, the molten plastic is coated onto the steel strip and extruded to form a steel-plastic composite strip with raised ribs. The strip traction mechanism transports the steel-plastic composite strip to the cooling mechanism for cooling. Then, the adhesive coating mechanism applies molten adhesive to one edge of the steel-plastic composite strip. The winding mechanism winds the steel-plastic composite strip, and simultaneously, the molten adhesive bonds the overlapping surfaces of the strips, thus forming the PVC-coated spiral wound pipe.

[0004] However, the existing spiral wound pipe production line can only process spiral wound pipes of the same diameter. If other diameter spiral wound pipes are to be produced, a new production line for spiral wound pipes of different diameters needs to be set up, which requires a large investment in equipment. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides a polyolefin plastic steel reinforced spiral pipe production line and production process, which can produce spiral pipes of different diameters, thereby saving equipment investment costs.

[0006] Firstly, this application provides a polyolefin plastic-steel reinforced spiral wound pipe production line, which adopts the following technical solution: A production line for polyolefin reinforced steel spiral wound pipe includes a steel strip unwinding mechanism, a plastic melting mechanism, a strip forming mechanism, a cooling mechanism, an adhesive coating mechanism, and a winding mechanism. The winding mechanism includes a frame, a fixed plate, an mounting plate, a mounting shaft, guide rollers, and a strip pressing assembly. Both the fixed plate and the mounting plate are mounted on the frame, and the fixed plate and the mounting plate are coaxial. A pipe outlet is provided on the fixed plate. Multiple sliders are slidably arranged on the fixed plate along the direction of the central axis perpendicular to the fixed plate, and the multiple sliders are distributed along the circumference of the fixed plate. Mounting blocks are slidably arranged on the mounting plate along the axial direction perpendicular to the mounting plate. Each slider corresponds to a mounting block. The fixed plate is provided with a first limiting member to prevent the sliders from sliding, and the mounting plate is provided with a second limiting member to prevent the mounting blocks from sliding. Multiple mounting shafts are provided, and each mounting shaft corresponds to a slider. The two ends of the mounting shaft are connected to the slider and the mounting block, respectively. Each mounting shaft is coaxially rotatably fitted with a guide roller. The side wall of the guide roller is provided with a spiral groove. The strip pressing assembly is used to press the steel-plastic composite strip onto one of the guide rollers and drive the strip to move.

[0007] By adopting the above technical solution, according to the required diameter of the wound pipe to be produced, multiple sliders on the fixed plate and mounting blocks on the mounting plate are slidable respectively, and the sliders are prevented from sliding by the first limiting member and the mounting blocks are prevented from sliding by the second limiting member, thereby adjusting the distance between each mounting shaft and the central axis of the fixed plate and keeping the distance between each mounting shaft and the central axis of the fixed plate consistent. During the production and processing of PVC-coated spiral wound pipe, a strip coated with molten adhesive is pressed onto one of the guide rollers by a strip pressing assembly, which drives the strip to move. The ribs of the PVC-coated spiral wound pipe are positioned in the spiral grooves on the guide rollers. Multiple guide rollers wind the PVC-coated spiral wound pipe into a tubular shape. While the PVC-coated spiral wound pipe is winding, the strip pressing assembly presses the overlapping surfaces of the PVC-coated spiral wound pipe together and bonds and fixes the overlapping surfaces with molten adhesive to form the PVC-coated spiral wound pipe. After winding, the PVC-coated spiral wound pipe exits the winding mechanism from the pipe outlet on the fixed plate. The winding mechanism can produce PVC-coated spiral wound pipes of different diameters, which greatly saves equipment investment costs.

[0008] Optionally, the strip pressing assembly includes a pressure roller and a first drive source, wherein a support frame is fixedly mounted on one of the mounting shafts, the pressure roller is rotatably mounted on the support frame, and the pressure roller is parallel to the axial direction of the mounting shaft. The first drive source is used to drive the pressure roller to rotate, and a gap is provided between the pressure roller and the guide roller for the steel-plastic composite strip to pass through.

[0009] By adopting the above technical solution, the steel-plastic composite strip is passed through the gap between the pressure roller and the guide roller, so that the steel-plastic composite strip overlaps on the already wound plastic-steel spiral tube, and the ribs on the steel-plastic composite strip are located in the spiral groove of the guide roller. The first drive source drives the pressure roller to rotate, so that both ends of the steel-plastic composite strip are respectively connected to the pressure roller and the guide roller, thereby pressing the steel-plastic composite strip onto one of the guide rollers and driving the strip to move. In addition, the pressure roller can also press the overlapping surface of the steel-plastic composite strip, improving the firmness of the molten adhesive in bonding and fixing the overlapping surface.

[0010] Optionally, a connecting block is slidably disposed on the support frame along the vertical mounting axis, the pressure roller is rotatably disposed on the connecting block, and a driving component for driving the connecting block to slide is disposed on the support frame.

[0011] By adopting the above technical solution, the distance between the pressure roller and the guide roller is adjusted by the sliding connecting block, which facilitates the entry of the steel-plastic composite strip between the pressure roller and the guide roller, and facilitates the installation of the steel-plastic composite strip. After the steel-plastic composite strip is installed, the sliding connecting block is used to press the pressure roller and the guide roller together to ensure the stability of the transmission of the steel-plastic composite strip by the pressure roller.

[0012] Optionally, a first drive ring is slidably disposed on the frame at the end of the fixed disk away from the mounting disk along the axial direction of the fixed disk, and a second drive ring is slidably disposed on the frame at the side of the mounting disk away from the fixed disk along the axial direction of the mounting disk. The diameter of the outer wall of the first drive ring gradually decreases along the direction closer to the fixed disk, and a plurality of the sliders abut against the outer wall of the first drive ring. The diameter of the outer wall of the second drive ring gradually decreases along the direction closer to the mounting disk, and a plurality of the mounting blocks abut against the outer wall of the second drive ring. The frame is provided with a drive assembly for driving the first drive ring and the second drive ring to slide in a direction that approaches or moves away from each other.

[0013] By adopting the above technical solution, the first drive ring and the second drive ring are driven to slide in a direction that approaches or moves away from each other by the drive component. When the slider abuts against the outer wall of the first drive ring, the distance between each slider and the central axis of the fixed disk remains consistent. When the mounting block abuts against the outer wall of the second drive ring, the distance between each mounting block and the central axis of the mounting disk remains consistent, thereby facilitating the positioning of the slider and the mounting block.

[0014] Optionally, the drive assembly includes a bidirectional screw, a worm gear, a worm, and a second drive source. The bidirectional screw is rotatably mounted on the frame, and the axial direction of the bidirectional screw is parallel to the axial direction of the fixed disk. The two ends of the bidirectional screw are threadedly engaged with a first drive ring and a second drive ring, respectively. The worm gear is coaxially and fixedly connected to the bidirectional screw. The worm is rotatably mounted on the frame and meshes with the worm gear. The second drive source is used to drive the worm gear to rotate.

[0015] By adopting the above technical solution, the worm is driven to rotate by the second drive source, the worm drives the worm wheel to rotate, and the worm wheel drives the bidirectional screw to rotate. Since the bidirectional screw is threadedly engaged with the first drive ring and the second drive ring, the first drive ring and the second drive ring can slide simultaneously in the direction of approaching or moving away from each other while the bidirectional screw is rotating.

[0016] Optionally, the fixed plate is provided with a first elastic element for driving the slider to slide towards the first drive ring, and the mounting plate is provided with a second elastic element for driving the mounting block to slide towards the second drive ring.

[0017] By adopting the above technical solution, the slider always abuts against the first drive ring under the elastic force of the first elastic element, and the mounting block always abuts against the second drive ring under the elastic force of the second elastic element. Thus, after the positions of the slider and the mounting block are adjusted, it is only necessary to limit the slider by the first limiting element and limit the mounting block by the second limiting element, which makes it more convenient to adjust the position of the slider and the mounting block.

[0018] Optionally, the mounting disc is rotatably mounted on the frame, and the frame is provided with a third drive source for driving the mounting disc to rotate. Each mounting block is slidably mounted with a mounting rod along the axial direction parallel to the mounting disc. One end of the mounting shaft is ball-jointed with the slider, and the other end of the mounting shaft is ball-jointed with the mounting rod. The mounting block is provided with a third limiting member for preventing the mounting rod from sliding.

[0019] By adopting the above technical solution, since the angle of the spiral groove on the guide roller remains unchanged, after the distance between each mounting shaft and the central axis of the fixed plate is adjusted, if the diameter of the plastic-steel spiral pipe increases, the width of the overlapping surface on the plastic-steel spiral pipe will decrease, which will easily lead to a decrease in the structural strength of the plastic-steel spiral pipe; if the diameter of the plastic-steel spiral pipe decreases, the width of the overlapping surface on the plastic-steel spiral pipe will increase, resulting in material waste. At this time, the mounting plate can be driven to rotate by a third drive source. Since the two ends of the mounting shaft are respectively ball-jointed with the slider and the mounting rod, and the mounting rod is slidably connected to the mounting block, the relative angle between the guide roller and the fixed plate and the mounting plate is changed while the mounting plate rotates, and the angle of the spiral groove relative to the fixed plate and the mounting plate is also changed, thereby adjusting the width of the overlapping surface for plastic-steel spiral pipes of different diameters, further increasing practicality.

[0020] Optionally, a bearing is fitted on the outer wall of the second drive ring, the inner ring of the bearing is fixedly connected to the second drive ring, and a connecting sleeve is fitted and fixed on the outer ring of the bearing, with the mounting block abutting against the connecting sleeve.

[0021] By adopting the above technical solution, since the mounting block and the second drive ring will slide relative to each other while the mounting disc is rotating, a connecting sleeve is rotatably sleeved on the outer wall of the second drive ring, thereby preventing friction between the mounting block and the second drive ring while the mounting disc is rotating, which would cause wear of the mounting block or the second drive ring and affect the positioning of the mounting block by the second drive ring.

[0022] Secondly, this application provides a production process for a polyolefin plastic-steel reinforced spiral wound pipe production line, which adopts the following technical solution: A production process for a polyolefin-reinforced steel spiral wound pipe production line includes the following steps: S1. Adjust the diameter: Adjust the distance between each mounting shaft and the center line of the fixed plate according to the required diameter of the spiral pipe to be produced, and make the distance between each mounting shaft and the center line of the fixed plate consistent. S2, Steel strip unwinding: Multiple steel strips are unwound and conveyed to the strip forming mechanism via the steel strip unwinding mechanism; S3, Plastic melting: Polyolefin plastic is melted through the plastic melting mechanism and then conveyed to the strip forming mechanism; S4. Strip forming: Molten plastic is coated onto a steel strip and extruded into a steel-plastic composite strip with raised ribs through a strip forming mechanism. S5. Apply adhesive: Apply molten adhesive to one side of the steel-plastic composite strip using an adhesive application mechanism. S6. Winding: The steel-plastic composite strip coated with molten adhesive is pressed onto one of the guide rollers and driven to move. The steel-plastic composite strip is wound into a tube shape by multiple guide rollers. While the steel-plastic composite strip is winding, the overlapping surfaces are bonded and fixed by molten adhesive to form a plastic-steel wound tube. S7. Discharge: After the plastic-steel spiral wound tube is completed, it exits the winding mechanism from the pipe outlet on the fixed plate.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. During the production and processing of PVC-coated spiral wound pipe, a strip pressure assembly presses a steel-plastic composite strip coated with molten adhesive onto one of the guide rollers and drives the strip to move. The ribs of the steel-plastic composite strip are positioned within the spiral grooves on the guide rollers. Multiple guide rollers wind the steel-plastic composite strip into a tubular shape. While the steel-plastic composite strip is winding, the strip pressure assembly presses the overlapping surfaces of the steel-plastic composite strip together and bonds and fixes the overlapping surfaces with molten adhesive to form the PVC-coated spiral wound pipe. The winding mechanism can produce PVC-coated spiral wound pipes of different diameters, greatly saving equipment investment costs. 2. Since the angle of the spiral groove on the guide roller remains unchanged, after the distance between each mounting shaft and the central axis of the fixed plate is adjusted, if the diameter of the plastic-steel spiral wound tube increases, the width of the overlapping surface on the plastic-steel spiral wound tube will decrease, which may easily lead to a reduction in the structural strength of the plastic-steel spiral wound tube; if the diameter of the plastic-steel spiral wound tube decreases, the width of the overlapping surface on the plastic-steel spiral wound tube will increase, resulting in material waste. At this time, the mounting plate can be driven to rotate by a third drive source. Since the two ends of the mounting shaft are respectively ball-jointed with the slider and the mounting rod, and the mounting rod is slidably connected to the mounting block, the relative angle between the guide roller and the fixed plate and the mounting plate is changed while the mounting plate rotates, and the angle of the spiral groove relative to the fixed plate and the mounting plate is also changed, thereby adjusting the width of the overlapping surface for plastic-steel spiral wound tubes of different diameters, further increasing practicality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a partial structural schematic diagram of an embodiment of this application, mainly used to illustrate the structural schematic diagram of the winding mechanism; Figure 3 yes Figure 2 Enlarged view of section A; Figure 4 yes Figure 2 Enlarged view of section B; Figure 5 This is a partial structural schematic diagram of an embodiment of this application, mainly used to illustrate the structural schematic diagram of the winding mechanism; Figure 6 yes Figure 5 A magnified view of section C; Figure 7 This is a partial structural schematic diagram of an embodiment of this application, mainly used to illustrate the structural schematic diagram of the strip pressing assembly.

[0025] Explanation of reference numerals in the attached drawings: 1. Steel strip unwinding mechanism; 2. Plastic material melting mechanism; 3. Strip forming mechanism; 4. Cooling mechanism; 5. Adhesive coating mechanism; 6. Winding mechanism; 61. Frame; 611. Third drive source; 612. First drive ring; 6121. First connecting frame; 613. Second drive ring; 6131. ​​Connecting sleeve; 6132. Second connecting frame; 614. Bidirectional screw; 615. Worm gear; 616. Worm; 617. Second drive source; 62. Fixing 621. Disc; 622. Pipe outlet; 623. First chute; 624. Slider; 625. First limiting element; 63. Mounting disc; 631. Second chute; 632. Mounting block; 6321. Mounting rod; 6322. Third limiting element; 633. Second elastic element; 634. Second limiting element; 64. Mounting shaft; 641. Support frame; 642. Connecting block; 643. Driving element; 65. Guide roller; 66. Pressure roller; 67. First driving source. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0027] This application discloses a production line for polyolefin-reinforced steel spiral wound pipes. (Refer to...) Figure 1It includes a steel strip unwinding mechanism 1, a plastic material melting mechanism 2, a strip forming mechanism 3, a cooling mechanism 4, an adhesive coating mechanism 5, and a winding mechanism 6; the steel strip unwinding mechanism 1 is used to unwind multiple steel strips and convey them to the strip forming mechanism 3; the plastic material melting mechanism 2 is used to melt polyolefin plastic and convey it to the strip forming mechanism 3; the strip forming mechanism 3 is used to coat the molten plastic onto the steel strip and extrude it to form a steel-plastic composite strip with ribs; and the adhesive coating mechanism 5 is used to coat the edge of the steel-plastic composite strip with molten adhesive.

[0028] Reference Figure 2 The winding mechanism 6 includes a frame 61, a fixed plate 62, a mounting plate 63, a mounting shaft 64, a guide roller 65, and a strip pressing assembly. The fixed plate 62 is fixedly mounted on the frame 61, and the mounting plate 63 is rotatably mounted on the frame 61. The central axes of the fixed plate 62 and the mounting plate 63 coincide. A pipe outlet 621 is provided on the fixed plate 62 in a direction perpendicular to the fixed plate 62. A third drive source 611 for driving the mounting plate 63 to rotate is provided on the frame 61. The third drive source 611 includes a stepper motor, which is fixedly mounted on the frame 61. The output shaft of the stepper motor is coaxially and fixedly connected to the mounting plate 63.

[0029] Reference Figure 2 , 3 Multiple first grooves 622 are provided on the fixed plate 62 along the direction perpendicular to the central axis of the fixed plate 62. A slider 623 is slidably arranged in each first groove 622. A first limiting block is fixedly arranged on the side wall of each slider 623. A first limiting groove is provided on the side wall of the first groove 622 along the direction perpendicular to the central axis of the fixed plate 62. The first limiting block is slidably arranged in the first limiting groove. Each slider 623 is distributed around the circumference of the fixed plate 62, and the distance between two adjacent sliders 623 is equal.

[0030] Reference Figure 2 A first drive ring 612 is slidably disposed on the frame 61 at the end of the fixed disk 62 away from the mounting disk 63 along the axial direction of the fixed disk 62. The first drive ring 612 is coaxial with the fixed disk 62. The diameter of the outer wall of the first drive ring 612 gradually decreases as it approaches the fixed disk 62. A first elastic element 624 is disposed on the fixed disk 62 for driving the slider 623 to slide towards the first drive ring 612. The first elastic element 624 includes a first compression spring. A first compression spring is disposed in each first slide groove 622. One end of the first compression spring abuts against the side wall of the first slide groove 622 away from the central axis of the fixed disk 62, and the other end of the first compression spring abuts against the slider 623. The slider 623 presses against the side wall of the first drive ring 612 under the elastic force of the first compression spring.

[0031] Reference Figure 3The fixed plate 62 is provided with a first limiting member 625 for preventing the slider 623 from sliding. The first limiting member 625 includes a first bolt. Multiple first threaded holes are provided on the outer wall of the fixed plate 62. The first threaded holes correspond one-to-one with the slide grooves and are connected to the corresponding slide grooves. The first threaded holes are adapted to the first bolts. A first bolt is inserted into each first threaded hole. The axis of the first bolt is parallel to the sliding direction of its corresponding slider 623.

[0032] Reference Figure 4 Multiple second sliding grooves 631 are provided on the mounting plate 63 along the direction of the vertical axis of the mounting plate 63. Each second sliding groove 631 is slidably disposed in the mounting block 632. A second limiting block is fixedly disposed on the side wall of the mounting block 632. The side wall of the second sliding groove 631 is provided along the direction of the vertical axis of the mounting plate 63. The second limiting block is slidably disposed in the second limiting groove. Multiple mounting blocks 632 are distributed around the circumference of the mounting plate 63, and each mounting block 632 corresponds to a slider 623.

[0033] Reference Figure 3 , 5 A second drive ring 613 is slidably disposed on the frame 61 on the side of the mounting plate 63 away from the fixed plate 62 along the axial direction of the mounting plate 63. The second drive ring 613 is coaxial with the first drive ring 612. The diameter of the outer wall of the second drive ring 613 gradually decreases along the direction close to the mounting plate 63. An annular groove is formed on the outer wall of the second drive ring 613 along the circumference of the second drive ring 613. A bearing is sleeved in the annular groove. The inner ring of the bearing is fixedly connected to the second drive ring 613. A connecting sleeve 6131 (not shown in the figure) is sleeved and fixed on the outer ring of the bearing.

[0034] Reference Figure 4 The mounting plate 63 is provided with a second elastic element 633 for driving the mounting block 632 to slide towards the second drive ring 613. The second elastic element 633 includes a second compression spring. Each second slide groove 631 is provided with a second compression spring. One end of the second compression spring abuts against the side wall of the second slide groove 631 away from the central axis of the mounting plate 63, and the other end of the second compression spring abuts against the mounting block 632. Under the elastic force of the second compression spring, the mounting block 632 presses against the outer side wall of the connecting sleeve 6131.

[0035] Reference Figure 4The mounting plate 63 is provided with a second limiting member 634 to prevent the mounting block 632 from sliding. The second limiting member 634 includes a second bolt. The outer wall of the mounting plate 63 is provided with a plurality of second threaded holes. The second threaded holes correspond one-to-one with the second sliding grooves 631 and are connected to the corresponding second sliding grooves 631. The second threaded holes are adapted to the second bolts. A second bolt is inserted into each second threaded hole. The axial direction of the first bolt is parallel to the sliding direction of its corresponding mounting block 632.

[0036] Reference Figure 3 , 4 Each mounting block 632 has mounting holes along the direction parallel to the central axis of the mounting disk 63. A mounting rod 6321 is slidably installed in each mounting hole. Multiple mounting shafts 64 are provided and correspond one-to-one with the slider 623. One end of the mounting shaft 64 is ball-jointed with the slider 623, and the other end of the mounting shaft 64 is ball-jointed with the mounting rod 6321. Multiple mounting shafts 64 are distributed around the circumference of the fixed disk 62. A guide roller 65 is coaxially rotatably sleeved on each mounting shaft 64. The side wall of the guide roller 65 has a spiral groove.

[0037] Reference Figure 4 The mounting block 632 is provided with a third limiting member 6322 to prevent the mounting rod 6321 from sliding. The third limiting member 6322 includes a clamping bolt. The side wall of the mounting block 632 is provided with a third threaded hole that communicates with the mounting hole. The third threaded hole is adapted to the clamping bolt. The clamping bolt passes through the third threaded hole and is threadedly engaged with the mounting block 632.

[0038] Reference Figure 2 , 6 The frame 61 is equipped with a drive assembly for driving the first drive ring 612 and the second drive ring 613 to slide in a direction that moves closer or further apart from each other. The drive assembly includes a bidirectional screw 614, a worm gear 615, a worm 616, and a second drive source 617. The bidirectional screw 614 is rotatably mounted on the frame 61, and the axial direction of the bidirectional screw 614 is parallel to the axial direction of the first drive ring 612. A first connecting bracket 6121 is fixedly mounted on the first drive ring 612. The first connecting bracket 6121 has a fourth threaded hole along the axial direction of the bidirectional screw 614. The second drive ring 613 is fixedly mounted with... A second connecting bracket 6132 is provided, and a fifth threaded hole is opened on the second connecting bracket 6132 along the axial direction of the bidirectional screw 614. The two ends of the bidirectional screw 614 pass through the fourth threaded hole and the fifth threaded hole respectively and are threadedly engaged with the first connecting bracket 6121 and the second connecting bracket 6132. The worm gear 615 is coaxially and fixedly connected to the bidirectional screw 614. The worm 616 is rotatably mounted on the frame 61 and meshes with the worm gear 615. The second drive source 617 includes a servo motor, which is fixedly mounted on the frame 61, and the output shaft of the servo motor is coaxially and fixedly connected to the worm 616.

[0039] Reference Figure 5 , 7 The strip pressing assembly includes a pressure roller 66 and a first drive source 67. A support frame 641 is fixedly mounted on a mounting shaft 64. A connecting block 642 is slidably mounted on the support frame 641 along the length direction perpendicular to the mounting shaft 64. A drive component 643 for driving the connecting block 642 to slide is provided on the support frame 641. The drive component 643 includes a servo cylinder, which is fixedly mounted on the support frame 641. The output shaft of the servo cylinder is fixedly connected to the connecting block 642. The pressure roller 66 is rotatably mounted on the connecting block 642, and the pressure roller 66 is parallel to the axial direction of the mounting shaft 64. The first drive source 67 includes a drive motor, which is fixedly mounted on the connecting block 642. The output shaft of the drive motor is coaxially fixedly connected to the pressure roller 66.

[0040] The implementation principle of a polyolefin plastic-steel reinforced spiral pipe production line according to this application embodiment is as follows: Based on the required spiral pipe diameter, a servo motor drives a bidirectional screw 614 to rotate, causing the first drive ring 612 and the second drive ring 613 to slide simultaneously in directions of approach or distance from each other. The first drive ring 612 drives multiple sliders 623 on the fixed disk 62 to slide, and the second drive ring 613 drives the mounting block 632 on the mounting disk 63 to slide, thereby adjusting the distance between each mounting shaft 64 and the central axis of the fixed disk 62. By rotating the first bolt, the first bolt is pressed against the slider 623, thereby preventing the slider 623 from sliding. By rotating the second bolt, the second bolt is pressed against the mounting block 632, thereby preventing the mounting block 632 from sliding. Then, a stepper motor drives the mounting disk 63 to rotate, changing the relative angle between the guide roller 65 and the fixed disk 62 and the mounting disk 63, and changing the angle of the spiral groove relative to the fixed disk 62 and the mounting disk 63, thereby adjusting the width of the overlap surface for plastic-steel spiral pipes of different diameters.

[0041] During the production and processing of plastic-steel spiral wound pipe, a steel-plastic composite strip coated with molten adhesive is passed through the gap between the pressure roller 66 and the guide roller 65, allowing the steel-plastic composite strip to overlap the already wound plastic-steel spiral wound pipe. The ribs on the steel-plastic composite strip are positioned within the spiral groove of the guide roller 65. The drive motor drives the pressure roller 66 to rotate, thereby causing the two ends of the steel-plastic composite strip to roll and connect with the pressure roller 66 and the guide roller 65 respectively. This presses the steel-plastic composite strip onto one of the guide rollers 65 and drives the strip to move. The steel-plastic composite strip is wound into a tubular shape by multiple guide rollers 65. While the steel-plastic composite strip is winding, the pressure roller 66 presses the overlapping surface of the steel-plastic composite strip and bonds and fixes the overlapping surface with molten adhesive to form a plastic-steel spiral wound pipe. After winding, the plastic-steel spiral wound pipe exits the winding mechanism 6 from the pipe outlet 621 on the fixed plate 62. The winding mechanism 6 can produce plastic-steel spiral wound pipes of different diameters, greatly saving equipment investment costs.

[0042] This application also discloses a production process for a polyolefin plastic-steel reinforced spiral pipe production line, including the following steps: S1. Adjust the diameter: Adjust the distance between each mounting shaft 64 and the center axis of the fixed plate 62 according to the required diameter of the wound pipe to be produced, and make the distance between each mounting shaft 64 and the center axis of the fixed plate 62 consistent. S2, Steel strip unwinding: Multiple steel strips are unwound and conveyed to the strip forming mechanism 3 via the steel strip unwinding mechanism 1; S3, Plastic melting: Polyolefin plastic is melted by the plastic melting mechanism 2 and then conveyed to the strip forming mechanism 3; S4. Strip forming: The strip forming mechanism 3 coats the molten plastic onto the steel strip and extrudes it to form a steel-plastic composite strip with ribs. S5. Apply adhesive: Apply molten adhesive to one side of the steel-plastic composite strip using the adhesive application mechanism 5. S6. Winding: The steel-plastic composite strip coated with molten adhesive is passed through the gap between the pressure roller 66 and the guide roller 65, so that the steel-plastic composite strip overlaps the already wound plastic-steel spiral tube, and the ribs on the steel-plastic composite strip are located in the spiral groove of the guide roller 65. The drive motor drives the pressure roller 66 to rotate, so that the two ends of the steel-plastic composite strip are respectively rolled and connected to the pressure roller 66 and the guide roller 65, thereby pressing the steel-plastic composite strip onto one of the guide rollers 65 and driving the strip to move. The steel-plastic composite strip is wound into a tube shape by multiple guide rollers 65. While the steel-plastic composite strip is winding, the pressure roller 66 presses the overlapping surface of the steel-plastic composite strip and uses molten adhesive to bond and fix the overlapping surface to form a plastic-steel spiral tube. S7. Discharge: After the plastic-steel spiral wound tube is completed, it exits the winding mechanism 6 from the pipe outlet 621 on the fixed plate 62.

[0043] 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 polyolefin plastic-steel reinforced spiral wound pipe production line, comprising a steel strip unwinding mechanism (1), a plastic material melting mechanism (2), a strip forming mechanism (3), a cooling mechanism (4), an adhesive coating mechanism (5), and a winding mechanism (6), characterized in that: The winding mechanism (6) includes a frame (61), a fixed plate (62), a mounting plate (63), a mounting shaft (64), a guide roller (65), and a strip pressing assembly. The fixed plate (62) and the mounting plate (63) are both mounted on the frame (61), and the fixed plate (62) and the mounting plate (63) are coaxial. The fixed plate (62) has a pipe outlet (621). Multiple sliders (623) are slidably arranged on the fixed disk (62) along the direction perpendicular to the central axis of the fixed disk (62), and the multiple sliders (623) are distributed circumferentially along the fixed disk (62). Mounting blocks (632) are slidably arranged on the mounting disk (63) along the axial direction perpendicular to the mounting disk (63). The sliders (623) and mounting blocks (632) correspond one-to-one. The fixed disk (62) is provided with a first limiting member (625) for preventing the sliders (623) from sliding, and the mounting disk (63) is provided with a second limiting member (634) for preventing the mounting blocks (632) from sliding. Multiple mounting shafts (64) are provided, and each mounting shaft (64) corresponds to a slider (623). The two ends of the mounting shaft (64) are connected to the slider (623) and the mounting block (632) respectively. Each mounting shaft (64) is coaxially rotatably fitted with a guide roller (65). The side wall of the guide roller (65) is provided with a spiral groove. The strip pressing assembly is used to press the steel-plastic composite strip onto one of the guide rollers (65) and drive the strip to move. A first drive ring (612) is slidably disposed on the frame (61) at the end of the fixed disk (62) away from the mounting disk (63) along the axial direction of the fixed disk (62). A second drive ring (613) is slidably disposed on the frame (61) at the side of the mounting disk (63) away from the fixed disk (62) along the axial direction of the mounting disk (63). The diameter of the outer wall of the first drive ring (612) gradually decreases in the direction close to the fixed disk (62). A plurality of sliders (623) abut against the outer wall of the first drive ring (612). The diameter of the outer wall of the second drive ring (613) gradually decreases in the direction close to the mounting disk (63). A plurality of mounting blocks (632) abut against the outer wall of the second drive ring (613). A drive assembly is provided on the frame (61) for driving the first drive ring (612) and the second drive ring (613) to slide in a direction close to or far away from each other. The mounting plate (63) is rotatably mounted on the frame (61). The frame (61) is provided with a third drive source (611) for driving the mounting plate (63) to rotate. Each mounting block (632) is slidably provided with a mounting rod (6321) along the axial direction parallel to the mounting plate (63). One end of the mounting shaft (64) is ball-jointed with the slider (623), and the other end of the mounting shaft (64) is ball-jointed with the mounting rod (6321). The mounting block (632) is provided with a third limiting member (6322) for preventing the mounting rod (6321) from sliding.

2. The polyolefin plastic-steel reinforced spiral pipe production line according to claim 1, characterized in that: The strip pressing assembly includes a pressure roller (66) and a first drive source (67). A support frame (641) is fixedly mounted on one of the mounting shafts (64). The pressure roller (66) is rotatably mounted on the support frame (641), and the pressure roller (66) is parallel to the axial direction of the mounting shaft (64). The first drive source (67) is used to drive the pressure roller (66) to rotate. A gap is provided between the pressure roller (66) and the guide roller (65) for the steel-plastic composite strip to pass through.

3. The polyolefin plastic-steel reinforced spiral pipe production line according to claim 2, characterized in that: A connecting block (642) is slidably disposed on the support frame (641) along the axial direction of the vertical mounting shaft (64), and the pressure roller (66) is rotatably disposed on the connecting block (642). A driving member (643) for driving the connecting block (642) to slide is disposed on the support frame (641).

4. The polyolefin plastic-steel reinforced spiral pipe production line according to claim 1, characterized in that: The drive assembly includes a bidirectional screw (614), a worm gear (615), a worm (616), and a second drive source (617). The bidirectional screw (614) is rotatably mounted on the frame (61), and the axial direction of the bidirectional screw (614) is parallel to the axial direction of the fixed disk (62). The two ends of the bidirectional screw (614) are threadedly engaged with the first drive ring (612) and the second drive ring (613), respectively. The worm gear (615) is coaxially fixedly connected to the bidirectional screw (614). The worm (616) is rotatably mounted on the frame (61) and meshes with the worm gear (615). The second drive source (617) is used to drive the worm gear (615) to rotate.

5. The polyolefin plastic-steel reinforced spiral wound pipe production line according to claim 1, characterized in that: The fixed disk (62) is provided with a first elastic element (624) for driving the slider (623) to slide towards the first drive ring (612), and the mounting disk (63) is provided with a second elastic element (633) for driving the mounting block (632) to slide towards the second drive ring (613).

6. The polyolefin plastic-steel reinforced spiral wound pipe production line according to claim 1, characterized in that: A bearing is fitted on the outer side wall of the second drive ring (613), the inner ring of the bearing is fixedly connected to the second drive ring (613), a connecting sleeve (6131) is fitted and fixed on the outer ring of the bearing, and the mounting block (632) abuts against the connecting sleeve (6131).

7. The production process of a polyolefin plastic-steel reinforced spiral pipe production line according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Adjust the diameter: Adjust the distance between each mounting shaft (64) and the center axis of the fixed plate (62) according to the required diameter of the spiral pipe to be produced, and make the distance between each mounting shaft (64) and the center axis of the fixed plate (62) consistent. S2, steel strip unwinding: multiple steel strips are unwound and conveyed to the strip forming mechanism (3) through the steel strip unwinding mechanism (1); S3, Plastic melting: Polyolefin plastic is melted by the plastic melting mechanism (2) and then transported to the strip forming mechanism (3); S4. Strip forming: The molten plastic is coated onto the steel strip and extruded into a steel-plastic composite strip with ribs by the strip forming mechanism (3). S5. Apply adhesive: Apply molten adhesive to one side of the steel-plastic composite strip using the adhesive application mechanism (5). S6. Winding: Press the steel-plastic composite strip coated with molten adhesive onto one of the guide rollers (65) and drive the strip to move. The steel-plastic composite strip is wound into a tube shape by multiple guide rollers (65). While the steel-plastic composite strip is winding, the overlapping surfaces are bonded and fixed by molten adhesive to form a plastic-steel winding tube. S7. Discharge: After the plastic-steel spiral wound tube is completed, it exits the winding mechanism (6) from the pipe outlet (621) on the fixed plate (62).

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