High-pressure high-ring-steel triangular steady-state steel skeleton plastic composite pipeline and manufacturing system and method thereof

Abstract

The invention discloses a high-pressure and high-ring-steel triangular steady-state steel framework plastic composite pipeline and a manufacturing system and method thereof, and relates to the technical field of steel framework plastic composite pipeline production, the high-pressure and high-ring-steel triangular steady-state steel framework plastic composite pipeline comprises a warp wire arrangement frame, and a weft wire storage rotating seat is arranged on one side of the warp wire arrangement frame; according to the full-automatic injection molding machine for the steel framework, preheating before injection molding of the steel framework is achieved, then the temperature difference between the steel framework and molten plastic is effectively reduced, the temperature difference between the steel framework and the molten plastic is effectively reduced, and the temperature difference between the steel framework and the molten plastic is effectively reduced; the situation that plastic on the outer side of the steel framework is contacted firstly during injection molding of the steel framework and is rapidly cooled and hardened to influence normal flowing of follow-up molten plastic is effectively prevented, and it is ensured that gaps on the outer side of the steel framework can be fully filled with the molten plastic in the injection molding process; the internal defects in the production process of the steel skeleton plastic composite pipe are effectively removed, and the quality of the steel skeleton plastic composite pipe product is further improved.

Description

Technical Field

[0001] This invention relates to the field of steel-reinforced plastic composite pipe manufacturing technology, specifically to a high-pressure, high-ring-stiffness triangular steady-state steel-reinforced plastic composite pipe and its manufacturing system and method. Background Technology

[0002] Steel-reinforced plastic composite pipe is a new type of double-sided anti-corrosion pressure pipe made of two materials: metal and plastic. It usually uses a high-strength steel skeleton as the core reinforcement. This skeleton is made of warp and weft steel wires continuously welded online to form a mesh skeleton, and is co-extruded with polyethylene plastic in one step to form a steel-plastic three-dimensional interpenetrating and interlocking pipe that jointly bears the working load. In addition, the steel frame adopts a lap welding process, which improves the ring stiffness and can withstand negative pressure, adapting to more demanding operating environments and ensuring the stability and safety of the pipeline in long-term use. Therefore, steel-framed plastic composite pipes are widely used in various pipeline systems and are an indispensable advanced and environmentally friendly material in modern pipeline construction. However, the weft layer inside the steel-framed plastic composite pipe is often welded by single-layer winding or double-layer reverse spiral welding, which results in sparse weld points after the steel frame is welded and the weft threads cannot cooperate with each other, thus reducing the overall structural strength of the steel frame. Meanwhile, the production process of steel-reinforced plastic composite pipes is affected by the factory environment. When the steel skeleton is injected in cold weather, there is a huge temperature difference between the low temperature steel skeleton and the high temperature molten plastic. This causes some of the molten plastic that first comes into contact with the steel skeleton to cool and harden rapidly, which affects the normal flow and coating of the molten plastic. This results in defects inside the steel-reinforced plastic composite pipe and reduces the overall product quality of the steel-reinforced plastic composite pipe. Summary of the Invention

[0003] This invention provides a high-pressure, high-ring-stiffness triangular steady-state steel-framed plastic composite pipe and its manufacturing system and method, which can effectively solve the problem mentioned in the background art that the internal weft layer of the steel-framed plastic composite pipe is often made by single-layer winding welding or double-layer reverse spiral welding, resulting in sparse weld points after the steel frame is welded and the weft threads cannot cooperate with each other, thereby reducing the overall structural strength of the steel frame. Meanwhile, the production process of steel-reinforced plastic composite pipes is affected by the factory environment. When the steel skeleton is injected in cold weather, there is a huge temperature difference between the low temperature steel skeleton and the high temperature molten plastic. This causes some of the molten plastic that first comes into contact with the steel skeleton to cool and harden rapidly, affecting the normal flow and coating of the molten plastic. This results in defects inside the steel-reinforced plastic composite pipe, reducing the overall product quality of the steel-reinforced plastic composite pipe.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a manufacturing system for a high-pressure, high-ring-rigidity triangular stable steel-framed plastic composite pipe, comprising a warp wire organizing frame, a weft wire storage rotating seat on one side of the warp wire organizing frame, a weft wire electric spark welding frame on one side of the weft wire storage rotating seat, a central support horizontal shaft at the end of the warp wire organizing frame, a front injection-molded cylinder connected to the end of the central support horizontal shaft, and a support tail seat on the outside of the central support horizontal shaft; The weft-line electric spark welding frame is provided with a front-end flexible heat conduction adjustment mechanism on one side. The front-end flexible heat conduction adjustment mechanism is used to preheat the steel frame to be injected to reduce the temperature difference between the steel frame and the molten plastic during the injection process. The front-end flexible thermal conductivity adjustment mechanism includes a front-end mounting plate; The bottom of the weft-line electrical discharge welding frame is provided with a front-end mounting plate. The top surface of the front-end mounting plate is provided with a bottom support frame and a top splicing frame. The sides of the bottom support frame and the top splicing frame are each equipped with a central hollow rotating shaft. The outer side of the central hollow rotating shaft is provided with a support limiting plate and a liquid guiding support pipe.

[0005] According to the above technical solution, an inner support tube is sleeved on the outside of the liquid guiding support tube, a flexible covering sleeve is bonded between the two support limiting plates, a limiting arc groove is opened on the outside of the flexible covering sleeve, and a support pressure sensor is installed on the side of the support limiting plate.

[0006] According to the above technical solution, liquid guiding sleeves are rotatably sleeved on both outer sides of the central hollow rotating shaft. A liquid guiding pipe is fixedly connected to the bottom of the liquid guiding sleeve. A water supply front pipe is fixedly connected to one side of the liquid guiding pipe at one end of the central hollow rotating shaft. A water supply circulation pump is fixedly connected to the end of the water supply front pipe. A water storage bottom box is fixedly connected to the end of the water supply circulation pump at the bottom position corresponding to the bottom support frame. A return water inclined pipe is fixedly connected to one side of the liquid guiding pipe at the other end of the central hollow rotating shaft. A drive fluid guiding box is provided at one end of the central hollow rotating shaft corresponding to the position on one side of the bottom support frame, and a central drive paddle is fixedly connected at the end of the central hollow rotating shaft corresponding to the position inside the drive fluid guiding box.

[0007] According to the above technical solution, an external hot water inlet pipe is fixedly connected to the bottom of one side of the driving liquid guiding round box, a water guiding connecting pipe is fixedly connected to the bottom of the other side of the driving liquid guiding round box, and a drain pipe is fixedly connected to one end of the water storage bottom box. A polygonal splicing base is fixedly installed in the middle of one side of the bottom support frame. A connecting swing rod is installed at the end of the polygonal splicing base by bolts. A magnetostrictive displacement sensor is installed at one end of the connecting swing rod by bolts. A guide rotating wheel is connected to the end of the magnetostrictive displacement sensor.

[0008] According to the above technical solution, a double-ring synchronous rotation shaping mechanism is provided on one side of the front mounting plate. The double-ring synchronous rotation shaping mechanism is used to passively guide the outer weft line of the welded steel frame and to correct it during the movement of the steel frame. The dual-ring synchronous rotation shaping mechanism includes an active support base; An active support base is provided on one side of the bottom of the front mounting plate. Supporting vertical rods are fixedly installed at both ends of the top surface of the active support base. Mounting hoops are bolted to both ends of the top surface of the supporting vertical rods. Limiting pressure sensors are uniformly embedded in both sides of the mounting ring along the circumferential direction. The ends of the limiting pressure sensors are fixedly connected to the internal positions of the mounting rings. Rotating rings are rotatably engaged with the internal positions of the two limiting pressure sensors by bolts.

[0009] According to the above technical solution, an external drive gear ring is fixedly sleeved on the middle of the outer side of the rotating hoop, and an auxiliary drive motor is fixedly installed at one end of the top surface of the active support seat corresponding to the bottom position of the external drive gear ring. The auxiliary drive motor is powered by an external power source, and a drive gear ring is fixedly sleeved at the end of the output shaft of the auxiliary drive motor corresponding to one side of the external drive gear ring. A guide sliding frame is fixedly connected to one side of the bottom of the active support base. A sliding support base is slidably installed on the top of the guide sliding frame. A guide hoop is symmetrically installed on the top of the sliding support base by bolts. A telescopic adjustment guide rod is fixedly connected to the inner side of the rotating hoop by a connecting block. A passive rotating ring is fixedly connected to the end of the telescopic adjustment guide rod at the position corresponding to the inside of the guide hoop. A bottom displacement telescopic rod is fixedly connected between the active support base and the sliding support base.

[0010] According to the above technical solution, a connecting cylinder is fixedly connected to the middle of the inner ring of both the rotating hoop and the passive rotating ring, and a transmission collar is connected to the outer side of the connecting cylinder by bolts and sleeves; Two central hollow rotating shafts are rotatably installed with drainage branch pipes embedded in the middle of their ends. A rectangular buffer box is fixedly connected to the end of the drainage branch pipe. A buffer lifting plate is installed inside the rectangular buffer box at the bottom position of the inner side of the rectangular buffer box via a spring. A drive fine liquid tube is fixedly connected to the middle of one side of the rectangular buffer box. A snap-fit ​​round box is fixedly connected to the end of the drive fine liquid tube at the bottom position of the guide ring. A snap-fit ​​lifting column is installed on the top of the inner side of the snap-fit ​​round box by a spring.

[0011] According to the above technical solution, a high-pressure, high-ring-stiffness triangular stable steel frame is used as the steel frame of a manufacturing system for a high-pressure, high-ring-stiffness triangular stable steel frame plastic composite pipe. The frame is characterized by including internal support warp lines arranged along the circumference, and external reinforcing weft lines are welded to the outer side of the internal support warp lines in a spiral direction. Each set of the external reinforcing weft threads comprises three strands, and the side cross-section of the external reinforcing weft threads is triangular.

[0012] According to the above technical solution, a high-pressure, high-ring-stiffness triangular steady-state steel-framed plastic composite pipe is produced by a high-pressure, high-ring-stiffness triangular steady-state steel-framed plastic composite pipe manufacturing system, wherein composite material is injected into the steel frame and cooled to form the pipe.

[0013] According to the above technical solution, a method for manufacturing a high-pressure, high-ring-stiff triangular steady-state steel-reinforced plastic composite pipe includes the following steps: S1. Radial Guided Arrangement: The warp threads on the outer wire frame are guided and arranged by the warp thread management frame so that the internal support warp threads can be evenly arranged on the outside of the central support horizontal axis; S2, Spiral Welding of Weft Wires: The outer reinforcing weft wires on the side of the weft wire storage rotating seat are sequentially welded to the outer side of the inner supporting warp wires using welding wheels. During the welding process, three or six welding wheels are selected as needed to weld the outer reinforcing weft wires to the outer side of the inner supporting warp wires in a triangular arrangement to complete the forming of the steel frame. S3. Skeleton preheating and trimming: By cooperating with each other in the flexible covering sleeve and its internal components, the residual heat in the cooling and forming process of the steel skeleton plastic composite pipe is used to preheat the steel skeleton, and the steel skeleton is shaped and trimmed by the liquid guiding support pipe, the limiting arc groove and the passive rotating ring. S4. External injection molding: Molten plastic is coated onto the outside of the steel frame through the front injection cylinder and extrusion mold to complete the initial shaping of the steel frame plastic composite pipe. S5. Cooling and molding: The extruded steel-framed plastic composite pipe is then cooled and molded using an external spraying device, and the high-temperature cooling water after absorbing heat is guided in a specific direction. S6. Inspection and Storage: The cooled and formed steel-framed plastic composite pipe is inspected, then marked with a laser marking machine, and finally cut off and stored using cutting equipment.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use. 1. A front-end flexible heat conduction adjustment mechanism is set up. Through the cooperation between the various components inside the front-end flexible heat conduction adjustment mechanism, the pretreatment process of the steel skeleton is optimized. The residual heat in the cooling and shaping process during the production of steel skeleton plastic composite pipe is fully utilized to achieve preheating of the steel skeleton before injection molding. This effectively reduces the temperature difference between the steel skeleton and the molten plastic, and effectively prevents the plastic that first comes into contact with the outside of the steel skeleton during injection molding from cooling and hardening rapidly, which would affect the normal flow of the subsequent molten plastic. This ensures that the molten plastic can fully fill the gaps on the outside of the steel skeleton during the injection molding process, effectively removes internal defects in the production process of steel skeleton plastic composite pipe, and further improves the quality of steel skeleton plastic composite pipe products. Simultaneously, by utilizing the kinetic energy generated during the circulation of hot water in the external hot water inlet pipe to drive the central hollow rotating shaft and flexible covered sleeve to rotate, the kinetic energy generated during the circulation of water is fully utilized to assist the steel frame in axial movement. This effectively improves the overall stress condition of the steel frame, prevents abnormal deformation caused by uneven stress during traction, and further enhances the stability of the steel frame during production and transportation. Furthermore, by controlling the inlet and outlet water flow at both ends of the flexible covered sleeve through the regulating valve on the outside of the liquid guide pipe, the external dimensions of the flexible covered sleeve can be quickly adjusted. This ensures that the flexible covered sleeve can fit tightly against the outside of the steel frame during use, thereby improving the heat conduction efficiency between the flexible covered sleeve and the steel frame and ensuring the smooth preheating process of the steel frame. Furthermore, by using support pressure sensors and magnetostrictive displacement sensors to monitor the shape and dimensions of the steel frame in real time, it is ensured that defects in the steel frame during the production process can be detected in a timely manner, which further improves the smoothness of the steel frame production process and the speed of detection, and effectively expands the function of the steel frame plastic composite pipe production equipment.

[0015] 2. A double-ring synchronous rotation shaping mechanism is set up. Through the cooperation between the internal components of the double-ring synchronous rotation shaping mechanism, the shaping and inspection process in the steel skeleton production process is optimized. Through two sets of rotating trimming structures, namely the rotating hoop and the passive rotating ring, the kinetic energy of the steel skeleton during its movement and the auxiliary rotation of the auxiliary drive motor drive the transmission sleeve to rotate. By taking advantage of the uniform axial movement of the steel skeleton and the uniform movement of the auxiliary drive motor, the spiral weft pattern of the steel skeleton can be trimmed through the transmission sleeve while the pitch of the spiral weft remains unchanged. This ensures that the steel skeleton is subjected to uniform stress during the use of the steel skeleton plastic composite pipe, preventing damage caused by uneven stress during long-term use, and further improving the overall product quality of the steel skeleton plastic composite pipe. Meanwhile, the adjustable spacing between the rotating hoop and the driven rotating ring, as well as the adjustable tilt angle of the transmission collar, ensure that the internal components of the rotating hoop and the driven rotating ring can adapt to external reinforcing threads with different pitches. This effectively improves the adaptability of the steel-reinforced plastic composite pipe production equipment. Furthermore, the mutual cooperation between the internal components of the rectangular buffer box and the snap-fit ​​round box allows for timely braking of the rotating hoop and the driven rotating ring when the outer diameter changes drastically during the steel skeleton welding process, further enhancing the safety of the steel-reinforced plastic composite pipe production equipment.

[0016] 3. By cooperating with the internal supporting warp and the external reinforcing weft, and utilizing the triangular multi-layered arrangement of the external reinforcing weft, the number of welding points between the external reinforcing weft and the internal supporting warp is effectively increased, thereby effectively improving the overall structural strength of the steel frame and significantly increasing the overall ring stiffness of the steel frame.

[0017] In summary, the cooperation between the front-end flexible heat conduction adjustment mechanism and the double-ring synchronous rotation shaping mechanism optimizes the shaping and pretreatment process of the steel skeleton. By preheating the steel skeleton and rapidly adjusting its external structural shape, the stress process during the injection molding process and subsequent use of the steel skeleton plastic composite pipe is optimized. Furthermore, the waste heat generated during cooling and shaping during the production of the steel skeleton plastic composite pipe is fully utilized, improving the energy efficiency of the entire production process. This effectively enhances the overall environmental friendliness of the steel skeleton plastic composite pipe production equipment and significantly improves the overall quality and service life of the finished product. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the flexible sheathing sleeve of the present invention; Figure 3 This is a schematic diagram of the installation structure of the sliding support base of the present invention; Figure 4 This is a schematic diagram of the structure of the hollow rotating shaft in the center of the present invention. Figure 5 This is a schematic diagram of the front-end flexible heat conduction adjustment mechanism of the present invention; Figure 6 This is a schematic diagram of the structure for installing the guide wheel of the present invention; Figure 7 This is a schematic diagram of the internal support tube installation structure of the present invention; Figure 8 This is a schematic diagram of the structure of the double-ring synchronous rotation shaping mechanism of the present invention; Figure 9 This is a schematic diagram of the installation structure of the transmission collar of the present invention; Figure 10 This is a schematic diagram of the installation structure of the limit pressure sensor of the present invention; Figure 11 This is a schematic diagram of the internal support warp of the present invention; Figure 12 This is a schematic diagram of the structure of the externally reinforced weft side of the present invention; Figure 13 This is a flowchart of the steps of the present invention; The diagram labels are as follows: 1. Warp yarn guide frame; 2. Weft yarn storage rotating seat; 3. Weft yarn EDM welding frame; 4. Central support horizontal axis; 5. Front injection molded cylinder; 6. Front-end flexible heat conduction adjustment mechanism; 601. Front-end mounting plate; 602. Bottom support frame; 603. Top splicing frame; 604. Central hollow rotating shaft; 605. Support limiting plate; 606. Liquid guiding support pipe; 607. Internal support pipe; 608. Flexible covering sleeve; 609. Limiting arc groove; 610. Support pressure sensor; 611. Liquid guiding sleeve; 612. Liquid guiding connecting pipe; 613. Water supply front pipe; 614. Water supply circulation pump; 615. Water storage bottom box; 616. Return water inclined pipe; 617. Drive liquid guiding round box; 618. Central drive paddle; 619. External hot water inlet pipe; 620. Water guiding connecting middle pipe; 621. Drainage outer pipe; 622. Polygonal splicing seat; 623. Connecting swing rod; 624. Magnetostrictive displacement sensor; 625. Guide rotating wheel; 7. Double-ring synchronous rotation shaping mechanism; 701. Active support seat; 702. Supporting vertical rod; 703. Mounting hoop; 704. Limit pressure sensor; 705. Limiting bracket; 706. Rotating hoop; 707. External drive gear ring; 708. Connecting cylinder; 709. Transmission collar; 710. Auxiliary drive motor; 711. Drive gear ring; 712. Guide sliding frame; 713. Sliding support seat; 714. Guide hoop; 715. Telescopic adjustment guide rod; 716. Passive rotating ring; 717. Bottom repositioning telescopic rod; 718. Drainage branch pipe; 719. Rectangular buffer box; 720. Buffer lifting plate; 721. Drive thin liquid tube; 722. Snap-fit ​​round box; 723. Snap-fit ​​lifting column; 8. Support tailstock.

[0020] 1001. Internal supporting meridian; 1002. External reinforcing parallel. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figure 1-10 As shown, the present invention provides a technical solution, a high-pressure, high-ring-rigidity triangular stable steel skeleton plastic composite pipe and its manufacturing system and method, including a warp wire organizing frame 1, a weft wire storage rotating seat 2 is provided on one side of the warp wire organizing frame 1, a weft wire electric spark welding frame 3 is provided on one side of the weft wire storage rotating seat 2, and the welding wheels on the side of the weft wire electric spark welding frame 3 can be selected to be used in three or six, a central support horizontal shaft 4 is fixedly connected at the end of the warp wire organizing frame 1 corresponding to the middle position of the weft wire storage rotating seat 2 and the weft wire electric spark welding frame 3, a front injection-molded cylinder 5 is fixedly connected at the end of the central support horizontal shaft 4, and a support tail seat 8 is provided on the outer side of the central support horizontal shaft 4 corresponding to the side position of the weft wire electric spark welding frame 3; The weft-line electric spark welding frame 3 is provided with a front-end flexible heat conduction adjustment mechanism 6 on one side. The front-end flexible heat conduction adjustment mechanism 6 is used to preheat the steel frame to be injected to reduce the temperature difference between the steel frame and the molten plastic during the injection process. The front-end flexible heat conduction adjustment mechanism 6 includes a front-end mounting plate 601, a bottom support frame 602, a top splicing frame 603, a central hollow rotating shaft 604, a support limiting plate 605, a liquid guiding support pipe 606, an internal support pipe 607, a flexible covering sleeve 608, a limiting arc groove 609, a support pressure sensor 610, a liquid guiding sleeve 611, a liquid guiding connecting pipe 612, a water supply front pipe 613, a water supply circulation pump 614, a water storage bottom box 615, a return water inclined pipe 616, a drive liquid guiding round box 617, a central drive paddle 618, an external hot water inlet pipe 619, a water guiding connecting middle pipe 620, a drain outer pipe 621, a polygonal splicing seat 622, a connecting swing rod 623, a magnetostrictive displacement sensor 624, and a guide rotating wheel 625. The bottom of the weft-line electrical discharge welding frame 3 is provided with a front-end mounting plate 601. Both ends of the top surface of the front-end mounting plate 601 are fixedly connected to a bottom support frame 602. The top of the bottom support frame 602 is bolted to a top splicing frame 603. A central hollow rotating shaft 604 is rotatably installed through the middle of the side of both the bottom support frame 602 and the top splicing frame 603. Both ends of the outer side of the central hollow rotating shaft 604 are fixedly sleeved with support limiting plates 605. Both ends of the central hollow rotating shaft 604 are evenly fixedly connected with liquid guiding support tubes 606 at equal intervals along the circumferential direction. An inner support tube 607 is fixedly sleeved at the outer end of the liquid-guiding support tube 606. A flexible covering sleeve 608 is bonded between two support limiting plates 605. Limiting arc grooves 609 are evenly and equidistantly opened on the outer side of the flexible covering sleeve 608 along the circumferential direction. Support pressure sensors 610 are evenly and equidistantly fixed on the side of the support limiting plate 605 at the position corresponding to the inside of the flexible covering sleeve 608 along the circumferential direction. Corresponding grooves and protrusions are provided at the splicing point of the bottom support frame 602 and the top splicing frame 603. The sides of the splicing point of the bottom support frame 602 and the top splicing frame 603 are kept flush. The central hollow rotating shaft 604 is connected to the inner cavity of the flexible covering sleeve 608 through the liquid-guiding support tube 606. Both ends of the central hollow rotating shaft 604 are rotatably fitted with liquid guiding sleeves 611. Liquid guiding sleeves 611 are fixedly connected to the bottom of liquid guiding pipes 612. A water supply front pipe 613 is fixedly connected to one side of the liquid guiding pipe 612 at one end of the central hollow rotating shaft 604. A water supply circulation pump 614 is fixedly connected to the end of the water supply circulation pump 614 at the bottom position corresponding to the bottom of the bottom support frame 602. A return water inclined pipe 616 is fixedly connected to one side of the liquid guiding pipe 612 at the other end of the central hollow rotating shaft 604. A drive liquid guiding box 617 is provided at one end of the central hollow rotating shaft 604 corresponding to one side of the bottom support frame 602. A central drive paddle 618 is fixedly connected at the end of the central hollow rotating shaft 604 corresponding to the inside of the drive liquid guiding box 617. The water supply circulation pump 614 is powered by an external power source. The water storage box 615 contains circulating water. The end of the return water inclined pipe 616 is connected to the end of the water storage box 615. The outer side of the central drive paddle 618 is in close sliding contact with the inner wall of the drive liquid guiding box 617. An external hot water inlet pipe 619 is fixedly connected to one bottom side of the driving liquid guiding round box 617, and a water guiding connecting pipe 620 is fixedly connected to the other bottom side of the driving liquid guiding round box 617. A drain external pipe 621 is fixedly connected to one end of the water storage box 615. The end of the water guiding connecting pipe 620 is connected to the water storage box 615. The inlet end of the external hot water inlet pipe 619 is connected to the output end of the external circulating water pump. The end of the drain external pipe 621 is connected to the external return water pipe. A polygonal splicing base 622 is fixedly installed on the middle of one side of the bottom support frame 602. A connecting swing rod 623 is bolted to the end of the polygonal splicing base 622. A magnetostrictive displacement sensor 624 is bolted to one end of the connecting swing rod 623. A guide wheel 625 is connected to the end of the magnetostrictive displacement sensor 624. The liquid guiding sleeve 611 is connected to the inner cavity of the central hollow rotating shaft 604 through a liquid guiding groove. The signal output terminals of the support pressure sensor 610 and the magnetostrictive displacement sensor 624 are interconnected with the signal input terminal of an external controller. The various components inside the front flexible heat conduction adjustment mechanism 6 are connected through... The interaction between the components optimizes the pretreatment process of the steel skeleton, making full use of the residual heat during the cooling and shaping process in the production of steel skeleton plastic composite pipes. This achieves preheating of the steel skeleton before injection molding, thereby effectively reducing the temperature difference between the steel skeleton and the molten plastic. It also effectively prevents the plastic that first comes into contact with the outside of the steel skeleton during injection molding from cooling and hardening rapidly, which would affect the normal flow of the subsequent molten plastic. This ensures that the molten plastic can fully fill the gaps on the outside of the steel skeleton during injection molding, effectively eliminating internal defects in the production process of steel skeleton plastic composite pipes, and further improving the quality of steel skeleton plastic composite pipe products. Simultaneously, by utilizing the kinetic energy generated during the circulation of hot water in the external hot water inlet pipe 619, the central hollow rotating shaft 604 and the flexible covering sleeve 608 are driven to rotate. This fully utilizes the kinetic energy generated during the circulation of water to assist the steel frame in axial movement, effectively improving the overall stress distribution of the steel frame and preventing abnormal deformation due to uneven stress during traction. This further enhances the stability of the steel frame during production and transportation. Furthermore, the flow rate of water entering and exiting the flexible covering sleeve 608 is controlled by the regulating valve on the outside of the liquid guiding pipe 612, thereby enabling rapid adjustment of the external dimensions of the flexible covering sleeve 608. This ensures that the flexible covering sleeve 608 can fit tightly against the outside of the steel frame during use, improving the heat conduction efficiency between the flexible covering sleeve 608 and the steel frame, and ensuring the smooth preheating process of the steel frame. Furthermore, the shape and size of the steel frame are monitored in real time by the support pressure sensor 610 and the magnetostrictive displacement sensor 624 to ensure that defects in the steel frame can be detected in time during the production process. This further improves the smoothness of the steel frame production process and the speed of detection, and effectively expands the function of the steel frame plastic composite pipe production equipment. A double-ring synchronous rotation shaping mechanism 7 is provided on one side of the front mounting plate 601. The double-ring synchronous rotation shaping mechanism 7 is used to passively guide the outer weft line of the welded steel frame and to correct it during the movement of the steel frame. The dual-ring synchronous rotation shaping mechanism 7 includes an active support seat 701, a support vertical rod 702, a mounting ring 703, a limit pressure sensor 704, a limit clamp seat 705, a rotation ring 706, an external drive gear ring 707, a connecting cylinder 708, a transmission collar 709, an auxiliary drive motor 710, a drive gear ring 711, a guide sliding frame 712, a sliding support seat 713, a guide ring 714, a telescopic adjustment guide rod 715, a passive rotating ring 716, a bottom displacement telescopic rod 717, a drainage branch pipe 718, a rectangular buffer box 719, a buffer lifting plate 720, a drive thin liquid tube 721, a snap-fit ​​round box 722, and a snap-fit ​​lifting column 723. An active support base 701 is provided on one side of the bottom of the front mounting plate 601. Supporting vertical rods 702 are fixedly installed at both ends of the top surface of the active support base 701. Installation hoop rings 703 are connected to the top surfaces of the supporting vertical rods 702 by bolts. Both sides of the mounting ring 703 are uniformly embedded with limit pressure sensors 704 along the circumferential direction. The end of the limit pressure sensor 704 is fixedly connected to the inner position of the mounting ring 703 with a limit bracket 705. The inner positions of the two limit brackets 705 are bolted to a rotating ring 706. The sides of the two mounting rings 703 are flush with each other. The outer side of the rotating ring 706 is tightly slidably fitted with the inner wall of the limit bracket 705. An arc-shaped guide groove is opened through the middle of the outer side of the mounting ring 703. An external drive gear ring 707 is fixedly sleeved on the middle of the outer side of the rotating hoop 706. An auxiliary drive motor 710 is fixedly installed at one end of the top surface of the active support seat 701 corresponding to the bottom position of the external drive gear ring 707. The auxiliary drive motor 710 is powered by an external power source. A drive gear ring 711 is fixedly sleeved at the end of the output shaft of the auxiliary drive motor 710 corresponding to one side of the external drive gear ring 707. A guide slide frame 712 is fixedly connected to one side of the bottom of the active support 701. A sliding support 713 is slidably installed on the top of the guide slide frame 712. A guide hoop 714 is symmetrically installed on the top of the sliding support 713 by bolts. A telescopic adjustment guide rod 715 is fixedly connected to the inner side of the rotating hoop 706 by a connecting block. A passive rotating ring 716 is fixedly connected to the end of the telescopic adjustment guide rod 715 at the position corresponding to the inside of the guide hoop 714. A bottom displacement telescopic rod 717 is fixedly connected between the active support 701 and the sliding support 713. Both the rotating ring 706 and the passive rotating ring 716 have a connecting cylinder 708 fixedly connected to the middle of their inner rings. The outer side of the connecting cylinder 708 is connected to a transmission ring 709 by bolts and sleeves. Two hollow rotating shafts 604 have drainage branch pipes 718 embedded in the middle of their ends. A rectangular buffer box 719 is fixedly connected to the end of the drainage branch pipe 718. A buffer lifting plate 720 is installed inside the rectangular buffer box 719 at the bottom of its inner side via a spring. A driving fine liquid tube 721 is fixedly connected to the middle of one side of a rectangular buffer solution box 719. A snap-fit ​​circular box 722 is fixedly connected to the end of the driving fine liquid tube 721 at the bottom position corresponding to the guide ring 714. A snap-fit ​​lifting column 723 is spring-loaded onto the top inner side of the snap-fit ​​circular box 722. A driving gear ring 711 and a driving gear ring 707 mesh with each other. The outer side of the passive rotating ring 716 is rotatably connected to the inner wall of the guide ring 714. The arc-shaped groove on the inner side of the transmission sleeve 709 corresponds to the weft thread on the outer side of the steel frame. The top of the snap-fit ​​lifting column 723 has anti-slip textures. A gap is left between the top surface of the snap-fit ​​lifting column 723 and the outer side of the passive rotating ring 716. The internal components of the double-ring synchronous rotation shaping mechanism 7 cooperate with each other. The plastic forming and inspection process during the production of the steel frame has been optimized. By using two sets of rotating adjustment structures, namely the rotating hoop 706 and the passive rotating ring 716, the kinetic energy of the steel frame during its movement and the auxiliary rotation of the auxiliary drive motor 710 drive the transmission sleeve 709 to rotate. By utilizing the uniform axial movement of the steel frame and the uniform movement of the auxiliary drive motor 710, the spiral weft pattern of the steel frame can be adjusted by the transmission sleeve 709 while keeping the pitch of the spiral weft unchanged. This ensures that the steel frame is subjected to uniform stress during the use of the steel frame plastic composite pipe, preventing damage caused by uneven stress during long-term use and further improving the overall product quality of the steel frame plastic composite pipe. Meanwhile, the adjustable spacing between the rotating ring 706 and the passive rotating ring 716, as well as the adjustable tilt angle of the transmission collar 709, ensure that the internal components of the rotating ring 706 and the passive rotating ring 716 can adapt to external reinforcing weft threads 1002 with different pitches, thereby effectively improving the adaptability of the steel-reinforced plastic composite pipe production equipment. At the same time, through the mutual cooperation between the internal components of the rectangular buffer box 719 and the snap-fit ​​round box 722, the rotating ring 706 and the passive rotating ring 716 can be stopped in time when the outer diameter changes drastically during the steel skeleton welding process, further improving the safety of the steel-reinforced plastic composite pipe production equipment. like Figure 11-12 As shown, a high-pressure, high-ring-stiffness triangular stable steel-framed plastic composite pipe includes an internal support warp 1001 arranged along the circumference, and an external reinforcing weft 1002 welded to the outside of the internal support warp 1001 along the spiral direction. Each group of the external reinforcing纬线1002 includes three strands, and the side cross-section of the external reinforcing纬线1002 is triangular. Through the mutual cooperation between the internal supporting经线1001 and the external reinforcing纬线1002, the triangular multi-layer arrangement structure of the external reinforcing纬线1002 is utilized, and the mutual cooperation between multiple strands of the external reinforcing纬线1002 is used to effectively increase the welding points between the external reinforcing纬线1002 and the internal supporting经线1001, thereby effectively improving the overall structural strength of the steel skeleton and greatly increasing the ring stiffness of the overall steel skeleton; Among them, the external reinforcing纬线1002 can select纬线s with different diameters, and the number is greater than or equal to two. At the same time, the number of single points where the internal supporting经线1001 contacts the external reinforcing纬线1002 is greater than or equal to one.

[0023] Moreover, the external reinforcing纬线1002 of this embodiment first incorporates the design concept of "众" in this field, which further improves the overall comprehensive performance of the overall steel skeleton pipeline, achieving an exceeding effect where 1+1+1 is far greater than 3, belonging to the first in this field.

[0024] As Figure 13 shown, a manufacturing method for a high-pressure and high-ring stiffness triangular steady-state steel skeleton plastic composite pipeline includes the following steps: S1. Radial guiding arrangement: Guide and arrange the经线s on the external wire rack through the经线thread arranging rack 1 so that the internal supporting经线1001 can be evenly arranged outside the central supporting cross-axis 4; S2.纬线spiral welding: Sequentially weld the external reinforcing纬线1002 on the side of the纬线wire storage rotating seat 2 to the outside of the internal supporting经线1001 through the welding wheel, and select three or six welding wheels as needed during the welding process to weld the external reinforcing纬线1002 to the outside of the internal supporting经线1001 in a triangular arrangement form to complete the forming of the steel skeleton; S3. Skeleton preheating and trimming: Through the mutual cooperation between the flexible coating sleeve 608 and its internal components, utilize the waste heat during the cooling and forming process of the steel skeleton plastic composite pipeline to preheat the steel skeleton, and shape and trim the steel skeleton through the liquid guiding support pipe 606, the limiting arc groove 609 and the passive rotating ring 716; S4. External injection coating: Coat the molten plastic on the outside of the steel skeleton through the front-end injection cylinder 5 in配合with the extrusion die to complete the preliminary shaping of the steel skeleton plastic composite pipeline; S5. Cooling and forming: Then cool and form the extruded steel skeleton plastic composite pipeline through the external spraying device, and direct the high-temperature cooling water after absorbing heat; S6. Inspection and storage: Inspect the cooled and formed steel skeleton plastic composite pipeline, then mark it through the laser coding machine, and cut and store the ends through the cutting device.

[0025] The working principle and usage process of this invention: In practical application, when it is necessary to produce steel-framed plastic composite pipes, the warp wire organizer 1 guides and arranges the internal support warp wires 1001 for welding. Then, the weft wire storage rotating seat 2 guides and installs the outer reinforcing weft wire 1002 coils for welding. The weft wire electric spark welding frame 3 welds the outer reinforcing weft wire 1002 to the outside of the internal support warp wires 1001. The central support horizontal axis 4 and the support tail seat 8 guide the welded steel frame. Then, the molten material is covered to the outside of the steel frame through the cooperation between the front injection cylinder 5 and the corresponding extrusion mold. The newly injection-molded steel-framed plastic composite pipe is cooled and shaped by circulating water. When it is necessary to use high-temperature circulating water to preheat the newly welded steel frame, the external high-temperature circulating water is introduced into the drive liquid guiding box 617 through the external hot water inlet pipe 619. Then, the high-temperature circulating water inside the drive liquid guiding box 617 is introduced into the water storage box 615 through the water guiding connection pipe 620 for temporary circulation. After the high-temperature circulating water inside the water storage box 615 is used up, the circulating cooling water inside the water storage box 615 is discharged through the drain pipe 621 to realize the circulation of cooling water between the liquid guiding box 611 and the external cooling device. Furthermore, during the process of circulating water flowing through the liquid guiding sleeve 611, the kinetic energy of the circulating water drives the central drive paddle 618 to rotate, and during the rotation of the central drive paddle 618, it drives the corresponding central hollow rotating shaft 604 to rotate. During the rotation of the central hollow rotating shaft 604, the internal support pipe 607 and the flexible covering sleeve 608 are driven to rotate through the support limiting plate 605 and the liquid guiding support pipe 606, thereby enabling the flexible covering sleeve 608 to rotate synchronously with the movement of the steel frame, so as to reduce the load on the steel frame during the movement. While the central hollow shaft 604 rotates, the high-temperature circulating water inside the water storage box 615 is introduced into the water supply front pipe 613 through the water supply circulation pump 614. The high-temperature circulating water is then introduced into the liquid guiding pipe 612 through the water supply front pipe 613, and then into the liquid guiding sleeve 611 through the liquid guiding pipe 612. The circulating water inside the liquid guiding sleeve 611 is then introduced into the cavity between the internal support pipe 607 and the flexible covering sleeve 608 through the internal support pipe 607. The residual heat inside the circulating water is then used to provide auxiliary heating to the flexible covering sleeve 608, which in turn provides auxiliary heating to the steel skeleton passing outside it, thereby reducing the temperature difference between the steel skeleton and the molten plastic during the injection molding process. The contact area between the flexible covering sleeve 608 and the steel skeleton is increased by the limiting arc groove 609. Meanwhile, as the steel frame continues to move along the outer side of the flexible sheath 608, the pressure sensor 610 can monitor the pressure exerted by the steel frame on the inner wall of the flexible sheath 608 in real time to ensure that changes in the outer diameter of the steel frame due to welding defects can be detected in time. The connecting swing rod 623 is installed on the side of the bottom support frame 602 through the polygonal splicing seat 622. Then, the guide rotating wheel 625 is adjusted to a position parallel to the weft of the steel frame, and the groove on the side of the guide rotating wheel 625 is engaged with a warp thread, so that the guide rotating wheel 625 can move horizontally periodically with the movement of the steel frame. The displacement of the guide rotating wheel 625 is detected in real time by the magnetostrictive displacement sensor 624 to detect changes in the outer diameter of the weft of the steel frame. During the process of guiding and trimming the weft threads on the outside of the steel frame, the mounting ring 703 and its internal components are installed on the outside of the central support horizontal axis 4 through the active support seat 701 and the support vertical rod 702. The internal components of the guide ring 714 are installed on one side of the mounting ring 703 through the sliding support seat 713. Then, the transmission sleeve 709 is installed into the corresponding rotating ring 706 and passive rotating ring 716 through the connecting cylinder 708. The tilt angle of the transmission sleeve 709 is adjusted by the screw on the top of the transmission sleeve 709 to ensure that the groove on the side of the transmission sleeve 709 is engaged with the weft threads on the outside of the steel frame. This ensures that the steel frame can be driven to rotate passively through the transmission sleeve 709 during axial movement. Simultaneously, the auxiliary drive motor 710 drives the drive gear ring 711 to rotate, and during the rotation of the drive gear ring 711, the external drive gear ring 707 synchronously drives the rotating hoop ring 706 to rotate actively. Then, the rotation of the rotating hoop ring 706 drives the telescopic adjustment guide rod 715 and the passive rotating ring 716 to rotate synchronously. In this way, the load on the steel frame is reduced with the help of the auxiliary drive motor 710, preventing the friction between the steel frame and the transmission sleeve ring 709 from being too large and affecting the normal use of the steel frame. Furthermore, during the normal production process of the steel frame, the axial traction speed of the steel frame and the rotation speed of the auxiliary drive motor 710 remain constant. Therefore, it can be ensured that the steel frame and the transmission collar 709 can maintain low frictional relative transport under normal production conditions. When the pitch changes slightly during the welding process of the steel frame, the transmission collar 709 moves at a constant speed under the action of the auxiliary drive motor 710. Then, the force of the rotating hoop 706 and the passive rotating ring 716 during rotation can be used to adjust the shape of the weft thread on the outside of the steel frame, ensuring that the steel frame can maintain a good shape before injection molding. At the same time, the force between the transmission collar 709 and the steel frame can cause the spiral weft thread on the outside of the steel frame to break due to poor welding, so that the operator can find the problem in time and repair the welding, thereby improving the finished quality of the steel frame. The rotating hoop 706 is limited and guided by the limit pressure sensor 704 and the limit card seat 705 to prevent the rotating hoop 706 from deviating during rotation. When the rotating hoop 706 is passively squeezed by the external reinforcing weft 1002 of the steel frame through the transmission collar 709 and deviates, the external deformation of the external reinforcing weft 1002 can be monitored by the limit pressure sensor 704. When the outer weft threads of the steel frame at the top of the flexible sheath 608 become abnormally loose, causing an increase in the overall outer diameter, the internal pressure of the flexible sheath 608 rises rapidly. This causes the circulating water inside the flexible sheath 608 to be introduced into the rectangular buffer box 719 through the drain branch pipe 718. The buffer lifting plate 720 inside the rectangular buffer box 719 provides single-stage buffering. When the circulating water pressure inside the rectangular buffer box 719 reaches the buffer limit, the circulating water is introduced into the snap-fit ​​round box 722 through the drive thin liquid pipe 721. Then, the pressure of the circulating water drives the snap-fit ​​lifting column 723 inside the snap-fit ​​round box 722 to rise. The friction between the top surface of the snap-fit ​​lifting column 723 and the outside of the passive rotating ring 716 is used to brake the passive rotating ring 716 to ensure the safety of the steel frame production process. Furthermore, the distance between the rotating hoop 706 and the passive rotating ring 716 can be adjusted by extending and retracting the telescopic adjustment guide rod 715 and the bottom displacement telescopic rod 717.

[0026] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manufacturing system for a high-pressure, high-ring-stiffness triangular steady-state steel-framed plastic composite pipe, comprising a wire management frame (1), characterized in that: The warp line arrangement frame (1) is provided with a weft line storage rotating seat (2) on one side, the weft line storage rotating seat (2) is provided with a weft line electric spark welding frame (3) on one side, the warp line arrangement frame (1) is provided with a center support horizontal shaft (4) at the end, the center support horizontal shaft (4) is connected with a front end injection cylinder (5) at the end, and the center support horizontal shaft (4) is provided with a support tail seat (8) on the outer side; The weft line electric spark welding frame (3) is provided with a front end flexible heat conduction adjusting mechanism (6) on one side, which is used for preheating the steel framework to be injected, so as to reduce the temperature difference between the steel framework and the molten plastic in the injection process; The front end flexible heat conduction adjusting mechanism (6) comprises a front end mounting plate (601); The weft line electric spark welding frame (3) is provided with a front end mounting plate (601) at the bottom, the top surface of the front end mounting plate (601) is provided with a bottom support frame (602) and a top splicing frame (603), the side surfaces of the bottom support frame (602) and the top splicing frame (603) are both installed with a center hollow rotating shaft (604), the outer side of the center hollow rotating shaft (604) is provided with a support limiting plate (605) and a liquid guide support pipe (606).

2. The system for making a high-pressure high-ring-stiffness tri-stable steel skeleton plastic composite pipe according to claim 1, characterized in that, The outer side of the liquid guide support pipe (606) is sleeved with an internal support pipe (607), the flexible cladding sleeve (608) is bonded between the two support limiting plates (605), the outer side of the flexible cladding sleeve (608) is provided with a limiting arc-shaped groove (609), and the side surface of the support limiting plate (605) is installed with a support pressure sensor (610).

3. The system for making a high pressure high ring stiff triangular steady steel skeleton plastic composite pipe according to claim 2, characterized in that, The outer side of the center hollow rotating shaft (604) is rotatably sleeved with a liquid guide sleeve box (611) at both ends, the liquid guide connecting pipe (612) is fixedly connected with a water supply front pipe (613) on one side of the center hollow rotating shaft (604) at one end, the water supply front pipe (613) is fixedly connected with a water supply circulating pump (614) at the tail end, the water supply circulating pump (614) is fixedly connected with a water storage bottom box (615) at the end corresponding to the bottom position of the bottom support frame (602), and the liquid guide connecting pipe (612) is fixedly connected with a backwater inclined pipe (616) on one side of the center hollow rotating shaft (604) at the other end; The center hollow rotating shaft (604) is provided with a driving liquid guide circular box (617) at the position corresponding to one side of the bottom support frame (602), and the center driving paddle (618) is fixedly connected with the center driving paddle (618) at the position corresponding to the inside of the driving liquid guide circular box (617).

4. The system for making a high pressure high ring stiff triangular steady steel skeleton plastic composite pipe according to claim 3, characterized in that, The driving liquid guide circular box (617) is fixedly connected with an external hot water inlet pipe (619) on one side at the bottom, the driving liquid guide circular box (617) is fixedly connected with a water guide connecting middle pipe (620) on the other side at the bottom, and the water storage bottom box (615) is fixedly connected with a drainage outer pipe (621) at one end; The middle part of one side of the bottom support frame (602) is fixedly provided with a polygon splicing seat (622), the end of the polygon splicing seat (622) is provided with a connecting swing rod (623) through bolts, the end of one side of the connecting swing rod (623) is provided with a magnetostrictive displacement sensor (624) through bolts, and the tail end of the magnetostrictive displacement sensor (624) is connected with a guide rotating wheel (625).

5. The system for making a high pressure high ring stiff triangular steady steel skeleton plastic composite pipe according to claim 4, characterized in that, The front end mounting plate (601) is provided with a double-ring synchronous rotating shaping mechanism (7) on one side, which is used for passive guiding of the outer weft of the steel skeleton after welding and correcting during the movement of the steel skeleton. The double-ring synchronous rotating shaping mechanism (7) comprises a driving support seat (701). The front end mounting plate (601) is provided with a driving support seat (701) on one side, and the top surface of the driving support seat (701) is fixedly provided with a supporting vertical rod (702) at both ends. The two sides of the mounting hoop (703) are uniformly embedded with limiting pressure sensors (704) in the circumferential direction, the tail end of the limiting pressure sensor (704) is fixedly connected with a limiting clamp seat (705) at the position inside the mounting hoop (703), and the rotating hoop (706) is rotatably connected to the limiting clamp seat (705) at the position inside the two limiting clamp seats (705) through bolts.

6. The system for making a high pressure high ring stiff triangular steady steel skeleton plastic composite pipe according to claim 5, wherein, The rotating hoop (706) is fixedly sleeved with an external driving gear ring (707) on the middle part of the outer side, the driving support seat (701) is fixedly provided with an auxiliary driving motor (710) at one end of the top surface and at the position corresponding to the bottom of the external driving gear ring (707), the auxiliary driving motor (710) is powered by an external power supply, and the output shaft end of the auxiliary driving motor (710) is fixedly sleeved with a driving gear ring (711) at the position corresponding to one side of the external driving gear ring (707). The driving support seat (701) is fixedly connected with a guide sliding frame (712) at the position on one side of the bottom, the guide sliding frame (712) is slidingly provided with a sliding support seat (713) on the top, the sliding support seat (713) is symmetrically provided with a guide hoop (714) at the top through bolts, the rotating hoop (706) is fixedly connected with a telescopic adjusting guide rod (715) through a connecting block, the telescopic adjusting guide rod (715) is fixedly connected with a passive rotating ring (716) at the tail end and at the position corresponding to the inside of the guide hoop (714), and the driving support seat (701) and the sliding support seat (713) are fixedly connected with a bottom transposition telescopic rod (717).

7. The system for making a high pressure high ring stiff triangular steady steel skeleton plastic composite pipe according to claim 6, characterized in that, The rotating hoop (706) and the passive rotating ring (716) are fixedly connected with a connecting cylinder (708) in the middle part of the inner ring, and the outer side of the connecting cylinder (708) is connected with a transmission sleeve ring (709) through bolts and a sleeve. Two said center hollow rotating shaft (604) end middle embedded rotating installation has drainage branch pipe (718), drainage branch pipe (718) end fixedly connected with a rectangular buffer solution box (719), the rectangular buffer solution box (719) inside corresponding rectangular buffer solution box (719) inside bottom position is installed with buffer lifting plate (720) by spring; The rectangular buffer solution box (719) one side middle part is fixedly connected with drive fine liquid pipe (721), and the drive fine liquid pipe (721) end is fixedly connected with the clamping round box (722) at the bottom position corresponding to the guide hoop (714), and the inner side top of the clamping round box (722) is installed with the clamping lifting column (723) by the spring.

8. A high-pressure high-ring-stiffness triangular steady-state steel skeleton for a manufacturing system of a high-pressure high-ring-stiffness triangular steady-state steel-skeleton plastic composite pipe according to claim 7, characterized by, It comprises internal support warp (1001) arranged along the circumference, and external reinforcing weft (1002) is welded in a spiral direction outside the internal support warp (1001). Each group of the external reinforcing weft (1002) comprises three strands, and the cross section of the external reinforcing weft (1002) side is triangular.

9. A high pressure high hoop strength tri-axial steady state steel skeleton plastic composite pipe characterized in that, The steel skeleton plastic composite pipeline produced by the production system of the high-pressure high-ring rigid triangular stable steel skeleton plastic composite pipeline according to claim 8 is injected with composite material in the steel skeleton and is cooled and formed.

10. A method for manufacturing a high pressure high ring stiffness tri-axial steady steel skeleton plastic composite pipe, characterized in that, The production method of the high-pressure high-ring rigid triangular stable steel skeleton plastic composite pipeline according to claim 9 comprises the following steps: S1, radial guidance arrangement: the warp on the external warp frame is guided and arranged through the warp frame (1), so that the internal support warp (1001) can be uniformly arranged outside the central support horizontal shaft (4); S2, weft spiral welding: the external reinforcing weft (1002) on the weft storage rotating seat (2) side is welded to the outside of the internal support warp (1001) in turn through the welding wheel, and three or six welding wheels are selected according to the need in the welding process to weld the external reinforcing weft (1002) to the outside of the internal support warp (1001) in a triangular arrangement form, so as to complete the formation of the steel skeleton; S3, skeleton preheating and trimming: through the mutual cooperation between the flexible coating sleeve (608) and its internal components, the steel skeleton is preheated by using the residual heat in the cooling and forming process of the steel skeleton plastic composite pipeline, and the steel skeleton is shaped and trimmed through the liquid guide support pipe (606), the limiting arc-shaped groove (609) and the passive rotating ring (716); S4, external injection molding coating: the molten plastic is coated to the outside of the steel skeleton through the front end injection cylinder (5) cooperating with the extrusion die, so as to complete the preliminary shaping of the steel skeleton plastic composite pipeline; S5, cooling and forming: then the steel skeleton plastic composite pipeline after extrusion forming is cooled and formed through the external spraying equipment, and the high-temperature cooling water after heat absorption is directionally guided; S6, inspection and storage: the steel skeleton plastic composite pipeline after cooling and forming is detected, then is marked by the laser coding device, and is cut and stored by the cutting equipment.

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