A flexible composite pipe integrating thermal insulation and intelligent tracking functions and its manufacturing equipment.

Abstract

A flexible composite pipe integrating heat insulation and intelligent tracking functions, and its manufacturing equipment, relates to the field of flexible composite pipe production and manufacturing technology. The flexible composite pipe includes, from the inside out, an inner lining layer, a reinforcing layer, an inner protective layer, a heat insulation layer, a wrapping layer, and an outer protective layer. The reinforcing layer is woven from reinforcing fiber tapes. The weaving equipment used is a reinforcing fiber weaving device, including a warp pay-off spool, a warp guide rod, a warp tape, a weft pay-off ring, and a weft tape. The warp guide rod swings radially in the warp pay-off spool. The weft pay-off ring has a notch in the circumferential direction. Each time the weft pay-off ring rotates, the notch aligns with each warp guide rod. Each alignment causes the warp guide rod to swing from one extreme position to another through the notch. The weft tape rotates circumferentially around the composite pipe. The interweaving between the warp tape and the weft tape forms a weave, creating a mesh-like reinforcing layer. This invention uses the weaving of strip-shaped reinforcing fibers, which is significantly more efficient than the weaving of linear reinforcing fibers.

Description

Technical Field

[0001] This invention belongs to the field of flexible composite pipe manufacturing technology, and particularly relates to a flexible composite pipe and its manufacturing equipment that integrates heat insulation and intelligent tracking functions. Background Technology

[0002] With the continuous advancement of global industrialization, industries such as oil and gas, and chemical processing are constantly developing, leading to an ever-increasing demand for pipeline materials. In these industries, non-metallic composite pipes, with their corrosion resistance and chemical resistance, have become an ideal choice for transporting various media. In oil and gas extraction and transportation, pipelines need to withstand harsh geological conditions and corrosive oil and gas media; non-metallic composite pipes can effectively meet these challenges, ensuring a stable energy delivery.

[0003] Non-metallic composite pipes with reinforcing fiber layers generally have a stronger internal pressure bearing capacity than composite pipes without reinforcing fiber layers. The majority of existing non-metallic composite pipes have reinforcing fibers laid in a winding manner (e.g., application number 202511004208.5). Winded non-bonded reinforcing fibers are prone to twisting and deformation under internal pressure, resulting in structural instability. When the winded reinforcing fibers are bent, the gaps between the outer winding fibers become loose, reducing the internal pressure bearing capacity. A more ideal method is to lay the reinforcing layer in a braided manner.

[0004] However, it is very difficult to weave reinforcing fiber mesh on the outside of continuously produced pipes. The existing technology has a type of pipe - BWFRP (fiber braided pultruded cable protection sleeve), the structure of the braiding device used to braid this pipe is very complex, and it can only braid linear fibers, resulting in low braiding efficiency.

[0005] This invention still focuses on how to weave reinforcing fibers, but more specifically on how to achieve the weaving of strip reinforcing fibers (rather than the weaving of linear reinforcing fibers), because the weaving efficiency of strip reinforcing fibers is higher than that of linear reinforcing fibers.

[0006] In addition, most existing flexible composite pipes lack insulation layers, resulting in significant heat loss of the medium inside the pipe and a severe reduction in medium flowability, which is detrimental to the efficient transportation of the medium. Summary of the Invention

[0007] To address the problems in the background art, this invention provides a flexible composite pipe integrating heat insulation and intelligent tracking functions, as well as its manufacturing equipment. This invention also provides a weaving device for strip-shaped reinforcing fibers, which significantly improves weaving efficiency compared to weaving linear reinforcing fibers.

[0008] The technical solution provided by this invention is:

[0009] A flexible composite pipe integrating thermal insulation and intelligent tracking functions comprises, from the inside out, an inner lining layer, a reinforcing layer, an inner protective layer, an insulation layer, a wrapping layer, and an outer protective layer. The reinforcing layer is woven from reinforcing fiber tapes. Compared to wound reinforcing fibers, the woven structure forms a cross-mesh pattern, which can more evenly distribute stress, thus providing stronger resistance to internal pressure. The insulation layer has a strip structure, with its length aligned with the axial direction of the flexible composite pipe. This reduces material usage and seam length, further minimizing heat loss. An induction optical cable and a tracking cable are installed between the insulation layer and the wrapping layer. The induction optical cable is used for signal transmission, vibration monitoring, leak monitoring, and strain monitoring during pipeline operation, ensuring safe pipeline operation. The tracking cable is used for pipeline location tracking and detection, preventing accidental excavation and damage to the pipeline.

[0010] A manufacturing device for a flexible composite pipe integrating heat insulation and intelligent tracking functions includes a reinforcing fiber weaving device and an insulation layer laying device. The reinforcing fiber weaving device includes a warp pay-off spool, a weft pay-off ring, a warp tape, and a weft tape. The warp pay-off spool is fixed and has evenly spaced notches along its circumference. A warp tape guide rod is hinged to each notch. The warp tape guide rod swings radially around the warp pay-off spool and has two extreme swing positions, referred to as the inner extreme position and the outer extreme position. The warp tape passes through the warp tape guide rod and attaches to the inner lining layer. When the warp tape guide rod and the warp tape are at their two extreme positions, a weft pay-off ring is placed in the area formed between them. The center of the weft pay-off ring... With a round hole, the weft pay-off ring has a notch on the ring direction. The weft pay-off ring can rotate relative to the warp pay-off drum. During the rotation, when the notch aligns with any warp guide rod, the warp guide rod swings through the notch once with the warp tape, from one extreme position to another. The weft pay-off ring has a yarn-holding roller for storing the weft tape. As the weft pay-off ring rotates, the weft tape winds onto the inner lining layer and presses onto the warp tape located at the inner extreme position. As the warp guide rod changes its extreme position once a week, the weft tape and warp tape form a woven web. The weaving efficiency varies depending on the width of the weft tape and warp tape, and also varies depending on the rotation speed of the weft pay-off ring, but is generally greater than the weaving efficiency of linear reinforcing fibers.

[0011] A further technical solution is: the weft-direction pay-off ring on the side away from the pay-off roller has a toothed ring, and the warp-direction pay-off drum is provided with at least two drive gears that mesh with the toothed ring. The axial distance between the two drive gears is greater than the width of the notch. A drive motor is fixedly installed on the warp-direction pay-off drum, one of the drive gears is fixedly installed on the output shaft of the drive motor, and the other drive gear is indirectly driven by the output shaft of the drive motor.

[0012] A further technical solution is that both the warp and weft tapes are prepreg tapes made of carbon fiber.

[0013] A further technical solution is as follows: the warp pay-off spool is uniformly provided with radial holes along the circumference, and a ball is provided in the radial hole. Less than half of the ball extends out of the radial hole and rolls with the weft pay-off ring. The weft pay-off ring corresponding to the ball is machined with an annular groove, and the ball is located in the annular groove. The end of the radial hole is threaded with a hole plug, which encapsulates the ball in the radial hole. The inner side of the hole plug and the ball are in spherical fit.

[0014] A further technical solution is as follows: the insulation layer laying device includes an insulation tape, an insulation tape guide cylinder, an optical cable guide cylinder, a cable guide cylinder, a pressure roller assembly, and an insulation tape covering ring; the optical cable guide cylinder and the cable guide cylinder are respectively attached to the insulation tape guide cylinder, and are respectively installed on both sides of the insulation tape guide cylinder; the insulation tape passes through the insulation tape guide cylinder, the induction optical cable passes through the optical cable guide cylinder, and the tracer cable passes through the cable guide cylinder; the insulation tape, the induction optical cable, and the tracer cable are all pressed through the pressure roller assembly. The roller assembly and pressure roller assembly firmly bond and press the induction optical cable and tracer cable onto the same side of the insulation tape. The insulation tape, along with the induction optical cable and tracer cable, enters the insulation tape wrapping ring. The inner side of the insulation tape wrapping ring has two limiting protrusions A, which are used to press the insulation tape tightly onto the composite tube. Limiting springs are installed on adjacent sides of the two limiting protrusions A. After the insulation tape is pressed tightly onto the composite tube, the limiting springs on both sides apply opposite elastic forces to the induction optical cable and tracer cable bonded to the insulation tape. The elastic force stretches the insulation tape on both sides, preventing wrinkles during the wrapping process.

[0015] A further technical solution is: the insulation band covering the ring between the two limiting protrusions A has a limiting protrusion B, and an insulation reinforcement band is pressed between the inner side of the limiting protrusion B and the composite pipe.

[0016] A further technical solution is to connect the thermal insulation reinforcement strip to the thermal insulation strip using adhesive.

[0017] A further technical solution is: it also includes a glue container, wherein the optical cable guide tube and the cable guide tube are both double-walled tubes with cavities, the glue container is connected to the cavity of the double-walled tube, and the inner tube of the double-walled tube near the insulation belt guide tube has a glue outlet hole, and the glue squeezed out of the glue outlet hole is applied to the tracer cable and the sensing optical cable that pass through.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] First, the reinforcing layer in this invention is woven from strip-shaped warp and weft strips. The woven reinforcing fiber layer can distribute stress more evenly, and its internal pressure bearing capacity is significantly better than that of the wound non-bonded reinforcing fiber layer, whether in a normal or bent state.

[0020] Secondly, compared with the linear reinforcing fiber braiding used in existing BWFRP pipes, this invention uses strip reinforcing fibers for braiding, which not only significantly improves braiding efficiency but also simplifies the structure of the reinforcing fiber braiding device. The braiding device used in BWFRP pipes has a very complex structure and is only used for braiding linear reinforcing fibers, not strip reinforcing fibers.

[0021] Third, the present invention not only has an insulation layer to reduce heat loss, but also ensures that the insulation layer is very smooth and wrinkle-free during the wrapping process.

[0022] Fourth, the sensing optical cable in this invention runs through the entire flexible pipe, enabling signal transmission, vibration monitoring, leakage monitoring, and strain monitoring during pipeline operation, ensuring pipeline safety. Similarly, the tracer cable in this invention runs through the entire flexible pipe, enabling pipeline position tracking and detection, preventing accidental excavation and damage to the pipeline. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the "flexible composite pipe integrating heat insulation and intelligent tracking functions" in this invention.

[0024] Figure 2 This is a side view of the "warp feeder and warp guide rod" in the "reinforced fiber weaving device" of the present invention.

[0025] Figure 3 This is a side view of the "weft-laying ring and thread-laying roller" in the "reinforcing fiber weaving device" of the present invention.

[0026] Figure 4 This is a side view of the "reinforcing fiber weaving device" in this invention.

[0027] Figure 5 yes Figure 4 Cross-sectional view along the AA direction.

[0028] Figure 6 yes Figure 4 Cross-sectional view along the AB direction.

[0029] Figure 7 This is a partial structural diagram of the "insulation layer laying device" in this invention.

[0030] Figure 8 yes Figure 7 A view along the C direction.

[0031] Figure 9 This is a cross-sectional view of the "insulation tape covering ring" in the "insulation layer laying device" of this invention.

[0032] Figure 10 yes Figure 9A view along the D direction.

[0033] Figure 11 This is a cross-sectional view of the "insulation tape covering ring" in the "insulation layer laying device" of the present invention after the "limiting protrusion B" is added.

[0034] In the diagram: 1. Inner lining layer; 2. Reinforcing layer; 3. Inner protective layer; 4. Insulation layer; 5. Wrapping layer; 6. Outer protective layer; 7. Reinforcing fiber weaving device; 8. Insulation layer laying device; 701. Warp pay-off spool; 702. Weft pay-off ring; 703. Notch; 704. Gap; 705. Limiting ring; 706. Warp guide rod; 707. Warp tape; 708. Gear ring; 709. Drive gear; 710. Drive motor; 711. Short rod; 712. Hinge point; 713. Thread roller; 714. Weft belt; 715. Hole plug; 716. Ball bearing; 801. Insulation belt; 802. Insulation belt guide cylinder; 803. Pressure roller assembly; 804. Induction optical cable; 805. Optical cable guide cylinder; 806. Glue can; 807. Cable guide cylinder; 808. Tracer cable; 809. Limiting protrusion A; 810. Insulation belt covering ring; 811. Limiting spring; 812. Limiting protrusion B; 813. Insulation reinforcing belt; 814. Limiting protrusion C. Detailed Implementation

[0035] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0036] like Figure 1 As shown, this invention discloses a flexible composite pipe integrating thermal insulation and intelligent tracking functions. Its structure, from the inside out, includes an inner lining layer 1, a reinforcing layer 2, an inner protective layer 3, an insulation layer 4, a wrapping layer 5, and an outer protective layer 6. The reinforcing layer 2 is woven from reinforcing fiber tapes. Compared to wound reinforcing fibers, the woven structure has a cross-shaped mesh, which can more evenly distribute stress, thus having a stronger ability to withstand internal pressure, and its internal pressure-bearing performance remains almost unchanged when bent. The insulation layer 4 has a strip-shaped structure, with its length direction aligned with the axial direction of the flexible composite pipe. The strip-shaped insulation layer 4 directly covers the outside of the composite pipe. Compared to the wound insulation layer 4, the overlap of this invention is a straight line rather than a spiral, which not only saves material but also shortens the overlap length, further reducing heat loss. An optical fiber 804 and a tracer cable 808 are installed between the insulation layer 4 and the wrapping layer 5. The optical fiber 804 is used for signal transmission, vibration monitoring, leakage monitoring, and strain monitoring during pipeline operation to ensure pipeline safety. The tracer cable 808 is used for pipeline location tracking and detection to avoid accidental excavation and damage to the pipeline.

[0037] like Figure 2-11 As shown, the present invention discloses a manufacturing equipment for a flexible composite pipe that integrates heat insulation and intelligent tracking functions. Its main features include a reinforcing fiber weaving device 7 and a heat insulation layer laying device 8.

[0038] like Figure 5 As shown, the reinforcing fiber weaving device 7 includes a warp pay-off spool 701, a weft pay-off ring 702, a warp tape 707, and a weft tape 714. The warp pay-off spool 701 is fixed and has notches 704 evenly distributed circumferentially. A warp tape guide rod 706 is hinged in each notch 704. The warp tape guide rod 706 swings radially in the warp pay-off spool 701 and has two swing limit positions, which are referred to as the inner limit position and the outer limit position for easy distinction. The warp tape 707 starts from the warp... The guide rod 706 passes through the inner liner 1 and is attached to it. A limiting ring 705 is installed on the notch 704 of the radial pay-off drum 701. When the guide rod 706 swings and touches the limiting ring 705, it reaches the outer limit position. At this time, the angle between the warp belt 707 and the inner liner 1 is ∠α. In this embodiment, ∠α is greater than 90°. When the guide rod 706 swings and touches the inner side of the radial pay-off drum 701, it reaches the inner limit position. At this time, the angle between the warp belt 707 and the inner liner 1 is ∠β. When the warp guide rod 706 and the warp tape 707 are at two extreme positions, a weft pay-off ring 702 is set in the area formed in the middle. The weft pay-off ring 702 has a circular hole in the center and a notch 703 in the circumferential direction. The weft pay-off ring 702 can rotate relative to the warp pay-off drum 701. During the rotation, when the notch 703 is aligned with any of the warp guide rods 706, the warp guide rod 706 carries the warp tape 707 through the notch 703 once, from one extreme position to another. The weft pay-off ring 702 has a yarn-holding roller 713 for storing the weft tape 714. As the weft pay-off ring 702 rotates, the weft tape 714 is wound on the inner lining layer 1 and pressed on the warp tape 707 located at the inner extreme position. As the warp guide rod 706 switches extreme positions once a week, the weft tape 714 and the warp tape 707 form a weave. The weaving efficiency varies depending on the width of the weft strip 714 and the warp strip 707, as well as the rotation speed of the weft feed ring 702. However, it is generally greater than the weaving efficiency of linear reinforcing fibers. The weaving device used in existing BWFRP pipes has a very complex structure and is only used for weaving linear reinforcing fibers (the individual warp reinforcing fibers need to be wound together), and cannot be used for weaving strip reinforcing fibers.

[0039] In this invention, to achieve the swinging of the guide rod 706, a short rod 711 for driving its rotation is connected to the outer end of the guide rod 706. The inflection point between the guide rod 706 and the short rod 711 is the hinge point 712 between the guide rod 706 and the radial pay-off drum 701. A portion of the short rod 711 extends beyond the radial pay-off drum 701. A hydraulic drive rod (not shown in the figure) is provided on each short rod 711 on the radial pay-off drum 701. The extension and retraction of the hydraulic drive rod causes the short rod 711 to swing, thereby driving the guide rod 706 to swing between two extreme positions. The hydraulic drive rod can be automatically driven by an electrical control system. The hydraulic drive rod is only one possible implementation of this invention, and this part is not within the scope of protection claimed by this invention, therefore it is not described in detail.

[0040] In this invention, the weft-direction pay-off ring 702 on the side opposite to the pay-off roller 713 has a toothed ring 708, and the radial-direction pay-off drum 701 is provided with at least two drive gears 709 that mesh with the toothed ring 708, such as... Figure 2 As shown, the axles of the two drive gears 709 pass between the warp guide rods. The wheelbase between the two drive gears 709 must be greater than the width of the notch 703. The reason is that since the weft pay-off ring 702 has a notch 703 in the circumferential direction, if only one drive gear 709 is provided, the drive gear 709 cannot continue to drive the weft pay-off ring 702 to rotate after it is aligned with the notch 703. Therefore, at least two drive gears 709 are required. When one drive gear 709 reaches the notch 703, the other drive gear 709 can still drive the weft pay-off ring 702 to rotate, so that the weft pay-off ring 702 rotates without stopping or interrupting. A drive motor 710 is fixedly installed on the wire feeding drum 701. One drive gear 709 is fixedly installed on the output shaft of the drive motor 710, and the other drive gear 709 is indirectly driven to the output shaft of the drive motor 710 (for example, the other drive gear 709 is driven to the output shaft of the drive motor 710 via a belt), so that all drive gears 709 have the same direction of rotation and the same speed.

[0041] In this invention, both the warp tape 707 and the weft tape 714 are carbon fiber prepreg tapes. The carbon fiber prepreg tapes have adhesive properties when heated at high temperatures, which further bonds the woven mesh reinforcement layer 2, thereby further enhancing the stability of the reinforcement layer 2 structure.

[0042] In this invention, the warp pay-off spool 701 has radial holes uniformly formed along its circumference. A ball bearing 716 is disposed within each radial hole, with less than half of the ball bearing 716 extending out of the radial hole and rolling into contact with the weft pay-off ring 702. The weft pay-off ring 702, corresponding to the ball bearing 716, has an annular groove in which the ball bearing 716 is located. A plug 715 is threaded to the end of each radial hole, encapsulating the ball bearing 716 within the radial hole. The inner side of the plug 715 makes spherical contact with the ball bearing 716. The ball bearing 716 serves two purposes: firstly, to reduce friction between the weft pay-off ring 702 and the warp pay-off spool 701; and secondly, to limit the weft pay-off ring 702, preventing axial displacement.

[0043] In existing technologies, when covering the insulation tape 801, a binding tube is used to press the insulation tape 801 tightly. The drawback of this method is that the insulation tape 801 is prone to wrinkling, which affects the tightness of the subsequent wrapping layer 5. Material also accumulates at the wrinkled areas, causing gaps at the originally tight seams due to insufficient material, which is detrimental to insulation. Therefore, it is necessary to improve the problem of wrinkling when covering the insulation layer 4. Another existing technology divides the insulation tape 801 into four strips for wrapping. The four insulation tapes 801 are arranged in pairs facing each other. First, one pair of opposite sides is passed through the binding tube and pressed tightly, then a wrapping layer 5 is wrapped around them. Then, the other pair of opposite sides is passed through the binding tube and pressed tightly, and then another wrapping layer 5 is wrapped around them. This method not only requires wrapping the wrapping layer 5 twice, but also has four overlapping areas between the four wrapping tapes, wasting material. Therefore, this invention discloses an insulation layer laying device 8.

[0044] like Figure 7-11As shown, the insulation layer laying device 8 includes an insulation tape 801, an insulation tape guide cylinder 802, an optical cable guide cylinder 805, a cable guide cylinder 807, a pressure roller group 803, and an insulation tape covering ring 810. The optical cable guide cylinder 805 and the cable guide cylinder 807 are respectively attached to the insulation tape guide cylinder 802, and are installed near both sides of the insulation tape guide cylinder 802. The insulation tape 801 passes through the insulation tape guide cylinder 802, the induction optical cable 804 passes through the optical cable guide cylinder 805, and the tracer cable 808 passes through the cable guide cylinder 807. The insulation tape 801, the induction optical cable 804, and the tracer cable 808 then pass through the pressure roller group 803. Adhesive is applied to the induction optical cable 804 and the tracer cable 808. The pressure roller group 803 then presses the induction optical cable 804 and the tracer cable 808 through the pressure roller group 803. The optical fiber 804 and the tracer cable 808 are firmly bonded and pressed onto the same side of the insulation tape 801; the insulation tape 801, together with the induction optical fiber 804 and the tracer cable 808, enters the insulation tape covering ring 810, and the composite tube also passes through the center of the insulation tape covering ring 810. The inner side of the insulation tape covering ring 810 has two limiting protrusions A809 and one limiting protrusion C814. The inner sides of the two limiting protrusions A809 are used to press the insulation tape 801 tightly onto the composite tube, and the limiting protrusion C814 is located at the lower part of the insulation tape covering ring 810, used to straighten the passage of the composite tube. Figure 9 , 10 As shown, limit springs 811 are installed on the adjacent sides of the two limit protrusions A809 respectively. After the insulation tape 801 is pressed and wrapped around the composite tube, the limit springs 811 on both sides apply opposite elastic forces to the induction optical cable 804 and the tracer cable 808 bonded to the insulation tape 801 respectively. The elastic force causes the induction optical cable 804 and the tracer cable 808 to stretch the insulation tape 801 from two directions respectively, so as to prevent the insulation tape 801 from wrinkling during the wrapping process. In this invention, the width of the insulation tape 801 is less than or equal to the outer circumference of the composite pipe to be covered. After the covering is completed, the gap can be covered by an insulation reinforcement tape 813. Specifically, the insulation tape covering ring 810 between the two limiting protrusions A809 has a limiting protrusion B812. The length of the limiting protrusion B812 is about half the length of the insulation tape covering ring 810 (not shown in the figure). That is, part of the limiting spring 811 has already stretched the insulation tape 801 flat before entering the limiting protrusion B812. The insulation reinforcement tape 813 is pressed between the inner side of the limiting protrusion B812 and the composite pipe. The insulation reinforcement tape 813 is connected to the insulation tape 801 by adhesive. Thus, passing through the insulation tape covering ring 810 once can both prevent the insulation tape 801 from wrinkling and ensure that the insulation tape 801 is tightly sealed. Finally, only one wrapping layer 5 is needed.

[0045] The present invention also includes a glue container 806. The optical cable guide cylinder 805 and the cable guide cylinder 807 are both double-walled cylinders with cavities. The glue container 806 is connected to the cavity of the double-walled cylinder. The inner cylinder of the double-walled cylinder near the insulation belt guide cylinder 802 has a glue outlet hole. The glue squeezed out of the glue outlet hole is applied to the tracer cable 808 and the sensing optical cable 804 that pass through.

Claims

1. A manufacturing equipment for a flexible composite pipe integrating heat insulation and intelligent tracking functions, characterized in that: The flexible composite pipe comprises, from the inside out, an inner lining layer (1), a reinforcing layer (2), an inner protective layer (3), a thermal insulation layer (4), a wrapping layer (5), and an outer protective layer (6). The reinforcing layer (2) is woven from reinforcing fiber tape. The thermal insulation layer (4) is a strip structure. The length direction of the strip structure is consistent with the axial direction of the flexible composite pipe. An induction optical cable (804) and a tracer cable (808) are provided between the thermal insulation layer (4) and the wrapping layer (5). The manufacturing equipment for the flexible composite pipe includes a reinforcing fiber braiding device (7) and an insulation layer laying device (8); the reinforcing fiber braiding device (7) includes a warp pay-off spool (701), a weft pay-off ring (702), a warp tape (707), and a weft tape (714). The warp pay-off spool (701) has notches (704) evenly distributed around its circumference. A warp tape guide rod (706) is hinged in each notch (704). The warp tape guide rod (706) can swing relative to the warp pay-off spool (701) and has two swing limit positions, referred to as the inner limit position and the outer limit position, respectively. The warp tape (707) passes through the warp tape guide rod (706) and is attached to the inner lining layer (1). The warp tape guide rod (706) and the warp tape (707) are located at two... At the extreme position, a weft-direction pay-off ring (702) is set in the area formed in the middle. The weft-direction pay-off ring (702) has a round hole in the center and a notch (703) in the ring direction. The weft-direction pay-off ring (702) can rotate relative to the warp-direction pay-off drum (701). During the rotation, when the notch (703) is aligned with any warp guide rod (706), the warp guide rod (706) carries the warp tape (707) through the notch (703) once. The weft-direction pay-off ring (702) has a thread-holding roller (713) for storing the weft tape (714). As the weft-direction pay-off ring (702) rotates, the weft tape (714) is wound on the inner lining layer (1) and pressed on the warp tape (707) located at the inner extreme position. The weft-direction pay-off ring (702) on the side opposite to the pay-off roller (713) has a toothed ring (708), and the radial pay-off drum (701) is provided with at least two drive gears (709) that mesh with the toothed ring (708). The wheelbase between the two drive gears (709) is greater than the width of the notch (703). A drive motor (710) is fixedly installed on the radial pay-off drum (701). One of the drive gears (709) is fixedly installed on the output shaft of the drive motor (710), and the other drive gear (709) is indirectly driven by the output shaft of the drive motor (710). Both the warp tape (707) and the weft tape (714) are carbon fiber prepreg tapes; The radial pay-off spool (701) is provided with radial holes evenly distributed around the circumference. A ball (716) is provided in the radial hole. Less than half of the ball (716) extends out of the radial hole and rolls with the weft pay-off ring (702). The weft pay-off ring (702) corresponding to the ball (716) is machined with an annular groove. The ball (716) is located in the annular groove. The end of the radial hole is threaded with a plug (715). The plug (715) encapsulates the ball (716) in the radial hole. The inner side of the plug (715) is in spherical fit with the ball (716).

2. The manufacturing equipment for flexible composite pipes according to claim 1, characterized in that: The insulation layer laying device (8) includes an insulation tape (801), an insulation tape guide cylinder (802), an optical cable guide cylinder (805), a cable guide cylinder (807), a pressure roller group (803), and an insulation tape covering ring (810). The optical cable guide cylinder (805) and the cable guide cylinder (807) are respectively attached to the insulation tape guide cylinder (802). The optical cable guide cylinder (805) and the cable guide cylinder (807) are respectively installed on both sides of the insulation tape guide cylinder (802). The insulation tape passes through the insulation tape guide cylinder (802), the induction optical cable (804) passes through the optical cable guide cylinder (805), and the tracer cable (808) passes through the cable guide cylinder (807). The insulation tape (801), the induction optical cable (804), and the tracer cable (808) all pass through the pressure roller group (803). The pressure roller group (803) presses the induction optical cable (801) through the pressure roller group (803). The insulating tape (804) and the tracer cable (808) are bonded and pressed firmly onto the same side of the insulating tape (801); the insulating tape (801), together with the induction optical cable (804) and the tracer cable (808), enter the insulating tape covering ring (810). The inner side of the insulating tape covering ring (810) has two limiting protrusions A (809). The inner side of the limiting protrusions A (809) is used to press the insulating tape (801) onto the composite pipe. Limiting springs (811) are installed on adjacent sides of protrusion A (809). After the insulation tape (801) is pressed and wrapped around the composite tube, the limiting springs (811) on both sides apply opposite elastic forces to the induction optical cable (804) and tracer cable (808) bonded to the insulation tape (801). The elastic force stretches the insulation tape (801) on both sides, preventing the insulation tape (801) from wrinkling during the wrapping process.

3. The manufacturing equipment for flexible composite pipes according to claim 2, characterized in that: The insulation band covering ring (810) between the two limiting protrusions A (809) has a limiting protrusion B (812), and an insulation reinforcement band (813) is pressed between the inner side of the limiting protrusion B (812) and the composite pipe.

4. The manufacturing equipment for flexible composite pipes according to claim 3, characterized in that: The thermal insulation reinforcement strip (813) and the thermal insulation strip (801) are connected by adhesive.

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