A winding device and process for producing a large-diameter water supply pipe

Abstract

This invention relates to the field of composite pipe processing equipment technology. Specifically, it provides a winding device and process for producing large-diameter water supply pipes, used to wind fiberglass tape onto the outer wall of a pipe body. The winding device includes a frame, a moving platform, a pressure roller, and a hot air duct. The pipe body is rotatably mounted on the frame, and the moving platform is movably mounted on the frame, located on one side of the pipe body. The moving direction of the moving platform is parallel to the rotation axis of the pipe body. The pressure roller is rotatably mounted on the moving platform, opposite to the rotation direction of the pipe body. The fiberglass tape is coated with adhesive. A gap is left between the pressure roller and the pipe body for the fiberglass tape to pass through. The hot air duct is mounted on the moving platform and has an air outlet facing the gap. The air outlet is used to output hot air to melt the adhesive, which, in conjunction with the pressure roller, presses the fiberglass tape to bond it onto the outer wall of the pipe body. The winding device provided by this invention, through the pressure roller and the hot air duct, achieves stable bonding of the fiberglass tape, solving the technical problem of difficult bonding of glass fiber to PE pipe bodies in the prior art.

Description

Technical Field

[0001] This invention relates to the field of composite pipe processing equipment technology, specifically to a winding device and process for producing large-diameter water supply pipes. Background Technology

[0002] With the acceleration of urbanization and the advancement of long-distance water transmission projects, the market demand for large-diameter water supply pipes has surged. However, the strength and internal pressure resistance of traditional small-diameter water supply pipes are insufficient to meet the requirements of large-diameter scenarios. As a result, the industry has explored a composite structure of "inner PE pipe - glass fiber reinforcement layer - outer PE pipe body". It has been verified that this structure can improve the pressure resistance of the pipe.

[0003] However, current production methods face numerous technical bottlenecks. One problem is the poor compatibility and bonding difficulties between PE pipes and glass fibers. Simple mechanical winding easily leads to interlayer delamination, while traditional wrapping winding results in loose adhesion between the glass fiber and the outer wall of the PE pipe, causing wrinkles and areas of uncovering. Ultimately, this leads to low production efficiency and inconsistent product quality. Therefore, solving the bonding problem between PE and glass fibers and designing a suitable winding device to achieve tight wrapping and stable bonding of the reinforcing layer has become a crucial breakthrough in the current large-diameter water supply pipe composite production field. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a winding device and process for producing large-diameter water supply pipes, which solves the technical problem of difficulty in bonding glass fiber to PE pipe body in the prior art.

[0005] According to one aspect, at least one embodiment of the present invention provides a winding device for producing large-diameter water supply pipes, used to wind fiberglass tape onto the outer peripheral wall of a pipe body. The fiberglass tape is coated with an adhesive. The winding device includes a frame, a moving platform, a pressure roller, and a hot air pipe. The frame is used to mount the pipe body and drive it to rotate. The moving platform is movably mounted on the frame and located on one side of the pipe body. The moving direction of the moving platform is parallel to the rotation axis of the pipe body, and the moving platform is provided with a feeding mechanism for feeding the fiberglass tape. The pressure roller is rotatably mounted on the moving platform, and the rotation direction of the pressure roller is opposite to the rotation direction of the pipe body. It is used to press the fiberglass tape against the outer wall of the pipe body for bonding. The hot air pipe is mounted on the moving platform and located above the pressure roller. The hot air pipe is used to output hot air to melt the adhesive.

[0006] As a further technical solution, it also includes a number of auxiliary pressure rollers 1 arranged on the moving platform and distributed sequentially around the circumference of the tube body. Each of the auxiliary pressure rollers 1 is rotatably arranged on the moving platform. The rotation direction of the auxiliary pressure rollers 1 is opposite to the rotation direction of the tube body. The distance between the auxiliary pressure rollers 1 and the tube body decreases sequentially, so as to gradually squeeze the glass fiber strip onto the outer peripheral wall of the tube body.

[0007] As a further technical solution, it also includes an auxiliary pressure roller two rotatably mounted on the moving platform. The rotation direction of the auxiliary pressure roller two is opposite to the rotation direction of the tube body. An elastic layer is provided on the outer periphery of the auxiliary pressure roller two. The elastic layer has a plurality of arc-shaped surfaces distributed circumferentially. The curvature of the arc-shaped surfaces is the same as the curvature of the outer wall of the tube body. The arc-shaped surfaces are used to make surface contact with the fiberglass tape and press the fiberglass tape against the outer wall of the tube body.

[0008] As a further technical solution, the feeding mechanism includes an uncoiler, a storage box, and a hot press roller. The uncoiler is used to feed the fiberglass tape between the pressure roller and the tube. The hot press roller is located between the pressure roller and the uncoiler and is used to feed the fiberglass tape to wind from the bottom. The storage box is used to hold the adhesive material. The bottom of the storage box has an opening, and an applicator roller is rotatably installed at the opening, which abuts against the hot press roller. The applicator roller is used to apply the adhesive material to the hot press roller, and the hot press roller is used to feed and heat the adhesive material onto the fiberglass tape.

[0009] As a further technical solution, the storage box has a partition inside, which is used to separate the storage box into an upper cavity and a lower cavity. The upper cavity is used to contain the adhesive material, and the partition has a discharge port. The application roller is rotatably disposed in the lower cavity and is used to adhere the adhesive material from the discharge port and supply the adhesive material to the opening.

[0010] As a further technical solution, it also includes an internal support mechanism disposed on the frame. There are two internal support mechanisms, which are respectively used to support the two ends of the tube body. The internal support mechanism includes a rotating shaft, an adjusting ring, a hinge seat, a connecting rod assembly, and a support arm. The rotating shaft is rotatably disposed on the frame and has an axially extending threaded section. The adjusting ring is threadedly connected to the threaded section and is used to rotate on the threaded section to move axially along the rotating shaft. A hinge seat is slidably sleeved on the adjusting ring, and a hinge seat is fixedly disposed on the rotating shaft. The two hinge seats are connected by a number of connecting rod assemblies. A number of support arms are connected one-to-one with a number of connecting rod assemblies. The connecting rod assembly can swing under the action of the axial movement of the adjusting ring to drive the support arm to move radially and support the inner circumferential wall of the tube body.

[0011] As a further technical solution, the outer peripheral wall of the adjusting ring has a insertion hole for inserting a rod to screw the adjusting ring through the rod.

[0012] As a further technical solution, the adjusting ring is located at the end of the rotating shaft away from the frame.

[0013] As a further technical solution, the adhesive is a resin.

[0014] As a further technical solution, a winding process for producing large-diameter water supply pipes is also proposed. Using the aforementioned winding device for producing large-diameter water supply pipes, the process further includes the following steps:

[0015] S1. Tube fixing and positioning: Place the tube to be wound on the frame and tighten the inner circumferential wall of the tube by two symmetrically arranged internal support mechanisms;

[0016] S2. Fiberglass tape pretreatment: Apply adhesive to the fiberglass tape and manually pull the fiberglass tape from the bottom of the hot press roller to the top of the pressure roller;

[0017] S3. Winding parameter setting: Adjust the relative position of the moving platform and the tube body so that the fiberglass tape passes through the gap between the pressure roller and the tube body. Set the rotation speed of the tube body, pressure roller, hot pressure roller, axial movement speed of the moving platform, and temperature of the hot pressure roller and hot air pipe.

[0018] S4. Hot Melting and Extrusion Wrapping: Start the uncoiler to feed the fiberglass tape, and start the tube body, pressure roller and hot pressure roller to rotate. At the same time, start the moving platform to move along the tube body axis. The hot air pipe outputs hot air to the gap, and cooperates with the hot pressure roller to melt the adhesive on the fiberglass tape. The pressure roller squeezes the fiberglass tape, so that the fiberglass tape is bonded to the outer wall of the tube body.

[0019] S5. Assisted compaction reinforcement: If auxiliary pressure roller one is configured, several auxiliary pressure rollers with successively decreasing spacing are used to gradually compress the wound fiberglass tape. If auxiliary pressure roller two is configured, the fiberglass tape is compressed by surface contact through the arc surface of its elastic layer.

[0020] S6. Finished product removal: After the adhesive has completely cured, turn the adjusting ring in the opposite direction to make the support arm retract radially and detach from the inner wall of the pipe, and remove the wound large-diameter water supply pipe from the frame.

[0021] The beneficial effects of this invention are as follows:

[0022] In this invention, the hot air duct outputs hot air through the outlet, directly acting on the adhesive material at the gaps to achieve thermal melting of the adhesive material, providing the necessary conditions for bonding the fiberglass tape to the tube body. The counter-rotation of the pressure roller creates relative motion with the tube body, generating targeted extrusion pressure. The combined effect of these two directly solves the core technical problem of poor compatibility and difficult bonding between PE tube body and fiberglass, fundamentally avoiding interlayer delamination. The moving platform moves in a direction parallel to the rotation axis of the tube body, cooperating with the tube body's rotation around the axis, causing the fiberglass tape to spirally advance along the tube body's axis during winding, ensuring that the fiberglass tape can fully cover the outer wall of the tube body, effectively overcoming the local uncovering defects present in traditional wrapping winding. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the winding device in one embodiment of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure after removing the tube body in the embodiment;

[0026] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0027] Figure 4 for Figure 1 A cross-sectional view of the storage box and the hot press roller in the embodiment;

[0028] Figure 5 for Figure 2 A magnified structural diagram of part B in the middle;

[0029] In the diagram: 1. Fiberglass tape, 2. Tube body, 21. Gap, 3. Frame, 4. Moving platform, 41. Pressure roller, 42. Hot air duct, 421. Air outlet, 43. Auxiliary pressure roller one, 44. Auxiliary pressure roller two, 441. Elastic layer, 4411. Arc-shaped surface, 45. Uncoiler, 46. Storage box, 461. Coating roller, 462. Partition plate, 4621. Discharge port, 463. Opening, 47. Hot press roller, 5. Internal support mechanism, 51. Rotating shaft, 511. Threaded section, 52. Adjusting ring, 521. Insertion hole, 53. Hinge seat, 54. Linkage group, 55. Support arm. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] With the acceleration of urbanization and the widespread implementation of long-distance water transmission projects, the market demand for large-diameter water supply pipes continues to surge. The strength and internal pressure resistance of traditional small-diameter water supply pipes are no longer sufficient to meet the requirements of large-diameter applications. The industry has gradually explored a composite structure of "inner PE pipe - glass fiber reinforcement layer - outer PE pipe body." This composite structure has been proven in practice to significantly improve the pressure resistance of the pipe material and has become the mainstream development direction for large-diameter water supply pipes.

[0037] However, in actual production, the compatibility between PE pipe and glass fiber is poor, making bonding difficult. Relying solely on mechanical winding easily leads to interlayer delamination. Furthermore, traditional wrapping winding methods result in loose adhesion between the glass fiber and the outer wall of the PE pipe, causing wrinkles and areas of uncovered areas, ultimately leading to low production efficiency and inconsistent product quality. Therefore, this embodiment provides a winding device and process for producing large-diameter water supply pipes, aiming to solve the above-mentioned technical problems and achieve tight wrapping and stable full-coverage bonding between the glass fiber reinforcement layer and the PE pipe body.

[0038] like Figure 1 The diagram illustrates a winding apparatus for producing large-diameter water supply pipes according to an embodiment of the present invention. This apparatus winds fiberglass tape (1) onto the outer wall of a pipe body 2. The winding apparatus includes a frame 3, a moving platform 4, a pressure roller 41, and a hot air duct 42. The pipe body 2 is rotatably mounted on the frame 3, with its rotation axis extending horizontally. The moving platform 4 is movably mounted on the frame 3 and located on one side of the pipe body 2. The moving direction of the moving platform 4 is parallel to the rotation axis of the pipe body 2. The pressure roller 41 is rotatably mounted on the moving platform 4, with its rotation axis parallel to the rotation axis of the pipe body 2, and its rotation direction opposite to that of the pipe body 2. The surface of the fiberglass tape 1 is coated with an adhesive. A gap 21 is provided between the pressure roller 41 and the pipe body 2 for the fiberglass tape 1 to pass through. The hot air duct 42 is fixedly mounted on the moving platform 4 and is located above the pressure roller 41. The hot air duct 42 has an air outlet 421 facing the gap 21. The airflow output direction of the air outlet 421 is directly opposite the contact area between the fiberglass tape 1 and the tube body 2.

[0039] The winding device provided in this embodiment uses hot air output from the hot air pipe 42 to heat-melt the adhesive on the surface of the fiberglass tape 1, reducing the viscosity of the adhesive. Simultaneously, the pressure generated by the counter-rotation of the pressure roller 41 and the tube body 2 promotes a tight bond between the fiberglass tape 1 and the outer wall of the tube body 2, thus achieving stable adhesion. After the device is started, the tube body 2 rotates uniformly around its own rotation axis, and the moving platform 4 moves uniformly along the rotation axis of the tube body 2. The external conveying mechanism continuously conveys the fiberglass tape 1 coated with adhesive to the gap 21 between the pressure roller 41 and the tube body 2. The hot air pipe 42 simultaneously outputs hot air to the gap 21 area, and the hot air directly acts on the adhesive on the surface of the fiberglass tape 1, causing it to heat-melt. The pressure roller 41 rotates in the opposite direction as the moving platform 4 moves, applying continuous pressure to the fiberglass tape 1 passing through the gap 21. Under the combined action of the rotation of the tube body 2 and the axial movement of the moving platform 4, the fiberglass tape 1 is spirally wound and bonded to the outer wall of the tube body 2, completing the coating of the reinforcing layer.

[0040] Hot air duct 42 outputs hot air through air outlet 421, directly acting on the adhesive material at gap 21 to achieve thermal melting of the adhesive material, providing the necessary conditions for bonding of fiberglass tape 1 to tube 2. The counter-rotation of pressure roller 41 creates relative motion with tube 2, generating targeted extrusion force. The combined effect of these two directly solves the core technical problem of poor compatibility and difficult bonding between PE tube 2 and glass fiber, fundamentally avoiding interlayer delamination. The moving platform 4 moves in a direction parallel to the rotation axis of tube 2, cooperating with the rotation of tube 2 around its axis, so that fiberglass tape 1 is spirally advanced along the axis of tube 2 during winding, ensuring that fiberglass tape 1 can fully cover the outer wall of tube 2, effectively overcoming the local uncovering defects of traditional wrapping winding. The rotation axis of pressure roller 41 is consistent with that of tube 2 but in the opposite direction. During the extrusion of fiberglass tape 1, it can balance the friction force on fiberglass tape 1, reduce the relative sliding between fiberglass tape 1 and pressure roller 41 and tube 2, ensure the shape stability of fiberglass tape 1 during winding, and avoid wrinkles. The gap 21 provides a stable passage for the fiberglass tape 1 and ensures the effective compression stroke of the pressure roller 41 on the fiberglass tape 1, so that the fiberglass tape 1 is fully attached to the outer wall of the tube body 2. Combined with the hot melting effect of the hot air pipe 42, stable bonding is achieved while ensuring production continuity and improving production efficiency.

[0041] like Figure 2 , Figure 4The diagram illustrates the arrangement of the storage box 46, hot press roller 47, and uncoiler 45 on a moving platform 4 in one embodiment of the present invention, as well as the internal structure of the storage box 46. The uncoiler 45 is fixedly mounted on the moving platform 4, located on the side of the pressure roller 41 away from the tube body 2, and is used to carry the fiberglass tape 1 roll and convey it to subsequent mechanisms. The hot press roller 47 is rotatably mounted on the moving platform 4, positioned between the pressure roller 41 and the uncoiler 45. The conveying path of the fiberglass tape 1 is from the output of the uncoiler 45, around the bottom of the hot press roller 47 to the top of the pressure roller 41. The storage box 46 is fixedly mounted above the hot press roller 47. A partition 462 is fixed inside the storage box 46, and an opening 463 is provided at the bottom. The storage box 46 above the partition 462 is used to store adhesive material. A discharge port 4621 is provided on the partition 462, facing the opening 463, for guiding the adhesive material to the opening 463. The applicator roller 461 is rotatably positioned at the opening 463 of the storage box 46, with its outer circumference abutting against the outer circumference of the hot press roller 47. It is used to receive the adhesive material discharged from the outlet 4621 and apply it to the surface of the hot press roller 47. The fiberglass tape 1 is pre-applied with adhesive material before passing through the hot press roller 47. The hot press roller 47 can spread the pre-applied adhesive material as evenly as possible, and at the same time, it can transfer the adhesive material on its own surface to the surface of the fiberglass tape 1, thereby replenishing the adhesive material and heating it.

[0042] In this embodiment, the unwinder 45, hot press roller 47, and pressure roller 41 are arranged to form a stable conveying path for the fiberglass tape 1. The cooperation of the storage box 46, the coating roller 461, and the hot press roller 47 achieves integrated processing of adhesive replenishment, uniform pressing, and preheating, solving the problems of insufficient and uneven distribution of adhesive on the surface of the fiberglass tape 1. This lays the foundation for the subsequent hot air duct 42's hot melting effect and improves bonding reliability. The preheating function of the hot press roller 47 and the hot air hot melting of the hot air duct 42 work synergistically, ensuring that the adhesive is fully melted. Combined with the extrusion of the pressure roller 41, this significantly improves the bonding strength between the fiberglass tape 1 and the tube body 2, preventing interlayer delamination. The overall structure is integrated into the moving platform 4 and moves axially synchronously with the moving platform 4, adapting to the spiral winding trajectory of the fiberglass tape 1, ensuring the continuity of the entire pretreatment and main bonding process, and improving production efficiency.

[0043] like Figure 3 The diagram shows the structure of auxiliary pressure roller 1 43 and auxiliary pressure roller 2 44. Auxiliary pressure roller 1 43 and auxiliary pressure roller 2 44 can be used individually or in combination.

[0044] Several auxiliary pressure rollers 43 are sequentially arranged on the moving platform 4 around the circumference of the tube body 2, and are located on the side of the pressure roller 41 closest to the tube body 2. Each auxiliary pressure roller 43 is rotatably mounted on the moving platform 4, with its rotation axis parallel to the rotation axis of the tube body 2, and its rotation direction opposite to that of the tube body 2. The auxiliary pressure rollers 43 are distributed along the circumference of the tube body 2, and the distance between them and the tube body 2 decreases sequentially from the side away from the pressure roller 41 to the side closer to the pressure roller 41. Through the auxiliary pressure rollers 43 with progressively decreasing distances, a gradually increasing compressive force is applied to the passing fiberglass tape 1, avoiding excessive single compressive force that could damage the shape of the fiberglass tape 1, while simultaneously strengthening the adhesion between the fiberglass tape 1 and the tube body 2. After passing through the pressure roller 41, the fiberglass belt 1 first contacts the first auxiliary pressure roller 43. The distance between the auxiliary pressure roller 43 and the tube body 2 is the largest, and the initial extrusion force is applied. As the tube body 2 rotates, the fiberglass belt 1 passes through the subsequent auxiliary pressure rollers 43 in sequence. As the distance gradually decreases, the extrusion force gradually increases, and the gradual extrusion is completed.

[0045] Several auxiliary pressure rollers 43 are arranged around the circumference of the tube body 2, with a structural design that gradually decreases in distance, to achieve progressive compression of the fiberglass tape 1. This avoids tensile deformation or damage to the fiberglass tape 1 caused by a single high-intensity compression, ensuring the integrity of the fiberglass tape 1's winding shape. The gradually increasing compression pressure gradually improves the adhesion between the fiberglass tape 1 and the outer wall of the tube body 2. Combined with the thermal melting effect of the hot air pipe 42, this further eliminates the tiny gaps 21 between the fiberglass tape 1 and the tube body 2, enhancing bonding stability and reducing the risk of interlayer delamination. The rotation axis of the auxiliary pressure rollers 43 is parallel to the tube body 2 and rotates in the opposite direction, coordinating with the movement of the pressure roller 41 to ensure uniform force on the fiberglass tape 1 during progressive compression, avoiding wrinkles caused by localized force concentration and improving the smoothness of the winding.

[0046] The auxiliary pressure roller 44 is rotatably mounted on the moving platform 4 and located on the side of the pressure roller 41 closest to the tube body 2. The rotation axis of the auxiliary pressure roller 44 is parallel to the rotation axis of the tube body 2, and the rotation direction is opposite to the rotation direction of the tube body 2. An elastic layer 441 is fixedly provided on the outer periphery of the auxiliary pressure roller 44. Several arc-shaped surfaces 4411 are evenly distributed circumferentially on the elastic layer 441, and the curvature of each arc-shaped surface 4411 is consistent with the curvature of the outer wall of the tube body 2. The distance between the arc-shaped surface 4411 and the outer wall of the tube body 2 is less than the thickness of the fiberglass tape 1, which is used to form a surface contact with the fiberglass tape 1 and apply extrusion pressure. The arc-shaped surface 4411 of the elastic layer 441 forms a suitable surface contact with the outer wall of the tube body 2, increasing the extrusion contact area. At the same time, the elastic layer 441 can avoid interference, buffer the extrusion force, and avoid damage to the fiberglass tape 1. After the fiberglass tape 1 passes through the pressure roller 41, the arc-shaped surface 4411 of the elastic layer 441 contacts the surface of the fiberglass tape 1. Because the arc-shaped surface 4411 has the same curvature as the outer wall of the tube 2 and the distance is less than the thickness of the fiberglass tape 1, the arc-shaped surface 4411 generates a uniform surface extrusion force on the fiberglass tape 1, which tightly presses the fiberglass tape 1 onto the outer wall of the tube 2, thus completing the positioning extrusion.

[0047] The curvature of the arc-shaped surface 4411 matches that of the outer wall of the tube 2, achieving surface contact extrusion with the fiberglass tape 1. Compared to point or line contact, this significantly increases the extrusion contact area, allowing the fiberglass tape 1 to adhere more fully to the outer wall of the tube 2 and improving bonding uniformity. The elastic layer 441 buffers the force during the extrusion process, preventing damage to the fiberglass tape 1 caused by rigid extrusion. Simultaneously, the elastic layer 441 adapts to minor undulations on the surface of the fiberglass tape 1, further eliminating bonding gaps. The auxiliary pressure roller 44 works synergistically with the pressure roller 41 and the hot air pipe 42. The surface contact extrusion, combined with hot air melting and positioning extrusion by the pressure roller 41, enhances the bonding effect from both the contact area and force perspectives, effectively preventing interlayer peeling and wrinkles.

[0048] like Figure 5The diagram shows the structure of the inner support mechanism 5, which includes a rotating shaft 51, an adjusting ring 52, hinge seats 53, connecting rod groups 54, and support arms 55. The rotating shaft 51 is rotatably mounted on the frame 3, with its axis collinear with the rotation axis of the tube body 2. The rotating shaft 51 has an axially extending threaded section 511. The adjusting ring 52 is threadedly connected to the threaded section 511 via an internal thread, allowing axial movement along the threaded section 511 by rotating around the rotating shaft 51. Two hinge seats 53 are provided; one hinge seat 53 is movably fitted around the outer circumference of the adjusting ring 52, and the other hinge seat 53 is fixedly mounted on the rotating shaft 51. The two hinge seats 53 are spaced apart along the axial direction of the rotating shaft 51. One end of each connecting rod group 54 is hinged to one of the two hinge seats 53, and the other end is hinged to each of the support arms 55. The connecting rod groups 54 and the support arms 55 are all evenly spaced along the circumference of the rotating shaft 51. When the adjusting ring 52 moves axially along the rotating shaft 51, it can drive the support arm 55 to move radially along the rotating shaft 51 via the connecting rod assembly 54, so that the free end of the support arm 55 abuts against or disengages from the inner circumferential wall of the tube body 2. The rotating shaft 51 can rotate under the drive of the power mechanism, and drive the tube body 2 to rotate synchronously through the support arm 55.

[0049] The axial movement of the adjusting ring 52 is achieved through threaded transmission, and then the support arm 55 is driven to extend and retract radially through the connecting rod group 54 to achieve internal support and fixation of the tube body 2. At the same time, the rotation of the rotating shaft 51 drives the tube body 2 to rotate synchronously, ensuring the stability of the tube body 2 during the winding process. After the tube 2 is placed on the frame 3, the adjusting ring 52 is inserted into the insertion hole 521 of the adjusting ring 52 by inserting the rod. The adjusting ring 52 at both ends is rotated, and the adjusting ring 52 moves axially along the threaded section 511 of the rotating shaft 51. The connecting rod group 54 pulls or pushes the support arm 55 to extend radially outward until the free end of the support arm 55 abuts against the inner circumferential wall of the tube 2, thus completing the fixing and positioning of the tube 2. During the winding process, the rotating shaft 51 rotates under the drive of the power mechanism. The friction between the support arm 55 and the inner circumferential wall of the tube 2 drives the tube 2 to rotate synchronously around its own axis. This, combined with the axial movement of the moving platform 4, realizes the spiral winding of the fiberglass tape 1. After the winding is completed, the adjusting ring 52 is rotated in the opposite direction, and the support arm 55 retracts radially and disengages from the inner wall of the tube 2, so that the tube 2 can be removed.

[0050] Two internal support mechanisms 5 are symmetrically arranged at both ends of the tube body 2. They are fixed in place from the inside of the tube body 2 by support arms 55, so that the forces at both ends of the tube body 2 are balanced, preventing axial displacement or radial swaying of the tube body 2 during rotation and ensuring stable winding. The threaded connection structure between the adjusting ring 52 and the rotating shaft 51 has a self-locking function. Combined with the hinged design of the connecting rod assembly 54 and the support arm 55, the radial extension and retraction adjustment of the support arm 55 can be made more stable. It can also be adapted to tube bodies 2 with different inner diameters, greatly improving the versatility of the device.

[0051] The adjusting ring 52 is positioned at the end of the rotating shaft 51 furthest from the tube body 2, avoiding the installation space inside and at the end of the tube body 2. This provides ample operating space for the placement, positioning, and removal of the tube body 2, while also facilitating the operator's observation of the adjustment status. The insertion hole 521 provides a direct force application point for turning the adjusting ring 52. Combined with the external insertion rod, it forms a lever structure, reducing the force required to turn the adjusting ring 52 and solving the problem of difficult turning of the adjusting ring 52 when supporting large-diameter tube bodies 2, thus improving operational convenience. Several insertion holes 521 are evenly distributed circumferentially, allowing for the insertion of the insertion rod at different angles depending on the operating space, adapting to different installation and adjustment scenarios and enhancing operational flexibility.

[0052] The gap 21 is equal to or less than the thickness of the fiberglass tape 1, ensuring that the extrusion force applied by the pressure roller 41 to the fiberglass tape 1 reaches the effective range, so that the fiberglass tape 1 is in full contact with the outer wall of the tube body 2, thus ensuring the basic conditions for bonding from a structural perspective.

[0053] As a binder, the resin can melt rapidly within the temperature range set by the device, ensuring the bonding timeliness. After melting, the resin has good fluidity, which can fill the tiny gaps between the fiberglass tape 1 and the tube 2. Combined with the squeezing action of the pressure roller 41, it can achieve seamless bonding between the fiberglass tape 1 and the tube 2, thus helping to solve the problem of poor compatibility at the material level, improving the interlayer bonding force, and preventing peeling.

[0054] The winding process for producing large-diameter water supply pipes in this embodiment is based on a winding device, and the specific process is as follows:

[0055] First, fix and position the tube body 2. Place the tube body 2 to be wound on the frame 3. The operator holds the insertion rod and inserts it into the insertion hole 521 of the adjustment ring 52 of the inner support mechanism 5 at both ends of the tube body 2. Turning the adjustment ring 52 drives the support arm 55 to extend radially until the support arm 55 tightens the inner circumferential wall of the tube body 2, so that the tube body 2 is kept in a coaxial state, and the positioning and fixing are completed.

[0056] Then, the fiberglass tape 1 is pretreated. Resin is pre-coated on the surface of the fiberglass tape 1, the unwinder 45 is started, and the fiberglass tape 1 is manually pulled around the bottom of the hot press roller 47 so that the fiberglass tape 1 is in contact with the surface of the hot press roller 47, and then pulled to the top of the pressure roller 41 to complete the path arrangement of the fiberglass tape 1.

[0057] Next, the winding parameters are set. The relative position of the moving platform 4 and the tube 2 is adjusted using the adjustment structure on the frame 3 to ensure that the fiberglass tape 1 can stably pass through the gap 21 between the pressure roller 41 and the tube 2. The rotation speed of the tube 2, the rotation speed of the pressure roller 41 and the hot pressure roller 47, and the axial movement speed of the moving platform 4 are set. At the same time, the heating temperature of the hot pressure roller 47 and the hot air output temperature of the hot air pipe 42 are set to ensure that all parameters are matched to achieve stable winding.

[0058] The hot-melting and extrusion winding process is initiated. The uncoiler 45 feeds the fiberglass tape 1 to the subsequent mechanism at a set speed, simultaneously starting the rotation of the tube body 2, pressure roller 41, and hot pressure roller 47. The moving platform 4 moves along the axial direction of the tube body 2 at a set speed. The hot air pipe 42 continuously outputs hot air to the gap 21. The hot pressure roller 47 replenishes, evens out, and heats the resin on the surface of the fiberglass tape 1. The hot air further melts the resin. The pressure roller 41 applies extrusion pressure to the fiberglass tape 1, causing the fiberglass tape 1 to spirally wind along the axial direction of the tube body 2 and bond to the outer wall of the tube body 2.

[0059] If the device is equipped with auxiliary pressure roller 43 or auxiliary pressure roller 44, auxiliary compaction and reinforcement are performed. When auxiliary pressure roller 43 is configured, the fiberglass tape 1 is gradually squeezed by several auxiliary pressure rollers 43 with successively decreasing distances from the tube body 2 after passing through the pressure roller 41. When auxiliary pressure roller 44 is configured, the fiberglass tape 1 is subjected to surface contact compression through the arc-shaped surface 4411 of its elastic layer 441, further enhancing the bonding effect.

[0060] Finally, the finished product is removed. After the resin has completely cured, the adjusting ring 52 of the inner support mechanism 5 is rotated in the opposite direction to cause the support arm 55 to retract radially, disengage from the inner circumferential wall of the pipe body 2, release the fixed state of the pipe body 2, and remove the wound large-diameter water supply pipe from the frame 3.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A winding device for producing large-diameter water supply pipes, used to wind fiberglass tape (1) onto the outer peripheral wall of a pipe body (2), wherein the fiberglass tape (1) is coated with an adhesive, characterized in that, The winding device includes a frame (3), a moving platform (4), a pressure roller (41), and a hot air pipe (42). The frame (3) is used to install the tube body (2) and drive the tube body (2) to rotate. The moving platform (4) is movably arranged on the frame (3) and located on one side of the tube body (2). The moving direction of the moving platform (4) is parallel to the rotation axis of the tube body (2). The moving platform (4) is provided with a feeding mechanism for feeding the fiberglass tape (1). The pressure roller (41) is rotatably arranged on the moving platform (4). The rotation direction of the pressure roller (41) is opposite to the rotation direction of the tube body (2) and is used to press the fiberglass tape (1) to bond it to the outer wall of the tube body (2). The hot air pipe (42) is arranged on the moving platform (4) and located above the pressure roller (41). The hot air pipe (42) is used to output hot air to heat melt the adhesive. It also includes an auxiliary pressure roller 2 (44) rotatably mounted on the mobile platform (4). The rotation direction of the auxiliary pressure roller 2 (44) is opposite to the rotation direction of the tube body (2). An elastic layer (441) is provided on the outer periphery of the auxiliary pressure roller 2 (44). The elastic layer (441) has a plurality of arc-shaped surfaces (4411) distributed along the circumference. The curvature of the arc-shaped surfaces (4411) is the same as the curvature of the outer wall of the tube body (2). The arc-shaped surfaces (4411) are used to make surface contact with the fiberglass tape (1) and press the fiberglass tape (1) against the outer wall of the tube body (2). It also includes several auxiliary pressure rollers (43) arranged on the moving platform (4) and distributed sequentially around the circumference of the tube (2). The auxiliary pressure rollers (43) are all rotatably arranged on the moving platform (4). The rotation direction of the auxiliary pressure rollers (43) is opposite to the rotation direction of the tube (2). The distance between the auxiliary pressure rollers (43) and the tube (2) decreases sequentially, so as to gradually squeeze the fiberglass strip (1) onto the outer circumferential wall of the tube (2). The feeding mechanism includes an uncoiler (45), a storage box (46), and a hot press roller (47). The uncoiler (45) is used to feed the fiberglass tape (1) between the pressure roller (41) and the tube (2). The hot press roller (47) is located between the pressure roller (41) and the uncoiler (45) and is used to feed the fiberglass tape (1) to be wound from the bottom. The storage box (46) is used to hold the adhesive. The bottom of the storage box (46) has an opening (463). An applicator roller (461) is rotatably provided at the opening (463) and corresponds to the hot press roller (47) in abutting position. The applicator roller (461) is used to apply the adhesive to the hot press roller (47). The hot press roller (47) is used to feed and heat the adhesive to the fiberglass tape (1). It also includes an inner support mechanism (5) mounted on the frame (3). There are two inner support mechanisms (5), which are used to support the two ends of the tube body (2) respectively. The inner support mechanism (5) includes a rotating shaft (51), an adjusting ring (52), a hinge seat (53), a connecting rod group (54), and a support arm (55). The rotating shaft (51) is rotatably mounted on the frame (3) and has an axially extending threaded section (511). The adjusting ring (52) is threadedly connected to the threaded section (511) and is used to rotate on the threaded section (511) to move along the... The rotating shaft (51) moves axially, and a hinge seat (53) is slidably sleeved on the adjusting ring (52). A hinge seat (53) is fixed on the rotating shaft (51). Two hinge seats (53) are connected by several connecting rod groups (54). Several support arms (55) are connected to several connecting rod groups (54) one by one. The connecting rod group (54) can swing under the action of the axial movement of the adjusting ring (52) to drive the support arm (55) to move radially and support it on the inner circumferential wall of the tube body (2).

2. The winding device for producing large-diameter water supply pipes according to claim 1, characterized in that, The storage box (46) has a partition (462) inside, which is used to separate the storage box (46) into an upper cavity and a lower cavity. The upper cavity is used to contain the adhesive material. The partition (462) has a discharge port (4621). The application roller (461) is rotatably disposed in the lower cavity and is used to adhere the adhesive material from the discharge port (4621) and supply the adhesive material to the opening (463).

3. The winding device for producing large-diameter water supply pipes according to claim 1, characterized in that, The outer peripheral wall of the adjusting ring (52) has a insertion hole (521) for inserting a rod to screw the adjusting ring (52) through the rod.

4. The winding device for producing large-diameter water supply pipes according to claim 3, characterized in that, The adjusting ring (52) is located at the end of the rotating shaft (51) away from the frame (3).

5. A winding device for producing large-diameter water supply pipes according to claim 1, characterized in that, The binder is a resin.

6. A winding process for producing large-diameter water supply pipes, using the winding apparatus for producing large-diameter water supply pipes as described in claim 1, characterized in that, It also includes the following steps: S1. Fixing and positioning of the tube (2): Place the tube (2) to be wound on the frame (3) and tighten the inner wall of the tube (2) by two symmetrically arranged internal support mechanisms (5); S2, Pretreatment of fiberglass tape (1): Apply adhesive to fiberglass tape (1) and manually pull fiberglass tape (1) from the bottom of hot press roller (47) to the top of press roller (41); S3, Winding parameter setting: Adjust the relative position of the moving platform (4) and the tube (2) so that the fiberglass tape (1) passes through the gap (21) between the pressure roller (41) and the tube (2). Set the rotation speed of the tube (2), pressure roller (41), hot pressure roller (47), axial movement speed of the moving platform (4), and temperature of the hot pressure roller (47) and hot air pipe (42); S4. Hot melting and extrusion winding: Start the uncoiler (45) to convey the fiberglass tape (1), and start the tube body (2), pressure roller (41) and hot pressure roller (47) to rotate. At the same time, start the moving platform (4) to move along the axial direction of the tube body (2). The hot air pipe (42) outputs hot air to the gap (21) and cooperates with the hot pressure roller (47) to melt the adhesive on the fiberglass tape (1). The pressure roller (41) squeezes the fiberglass tape (1) so that the fiberglass tape (1) is bonded to the outer wall of the tube body (2). S5. Assisted compaction reinforcement: If an auxiliary pressure roller (43) is configured, the fiberglass tape (1) being wound is gradually squeezed by several auxiliary pressure rollers (43) with successively decreasing spacing. If an auxiliary pressure roller (44) is configured, the fiberglass tape (1) is squeezed by surface contact through the arc surface (4411) of its elastic layer (441). S6. Finished product removal: After the adhesive has fully cured, turn the adjusting ring (52) in the opposite direction to make the support arm (55) retract radially and detach from the inner wall of the pipe body (2), and remove the large-diameter water supply pipe that has been wound from the frame (3).

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