A multi-spiral tape winding machine for composite pipes and its working method

Abstract

This invention discloses a multi-spiral tape winding machine for composite pipes, comprising a screw base device, a slide table device, a gear transmission device, a rotating disk, a heating air gun mechanism, and an unwinding mechanism. The slide table device is slidably connected to the upper part of the screw base device. The gear transmission device is installed on one side of the slide table device, and the rotating disk is inserted through the other side of the slide table device and connected to the gear transmission device. A composite pipe mounting position is provided in the middle of the rotating disk. Multiple heating air gun mechanisms and unwinding mechanisms are provided in equal numbers, arranged circumferentially and staggered around the composite pipe mounting position, and each connected to the same side of the rotating disk. The working method is also disclosed. This invention can effectively complete the winding process of the reinforcing layer, thereby improving the production efficiency and pressure resistance of the pipe. It has good continuity and winding quality, and has good application prospects.

Description

Technical Field

[0001] This invention relates to a composite pipe production and processing equipment, and more particularly to a multi-spiral tape winding machine for composite pipes and its working method. Background Technology

[0002] In the production of composite pipes, continuous glass fiber reinforced tape has a significant effect on strengthening thermoplastic pipes. However, current single-spiral winding machines are prone to deformation of continuous glass fiber tape during the stretching process, while double-spiral winding machines cause greater deformation of the ellipticity of the inner tube during the winding process, making them relatively dangerous winding methods.

[0003] Chinese patent application CN112936936A discloses a reinforced flexible composite pipe, a winding machine, and a composite pipe production line. During operation, an inner pipe passes through the winding machine, and first axial reinforcing fibers, radial reinforcing fibers, and second axial reinforcing fibers are laid on its outer wall, allowing for convenient and stable laying of the reinforcing fibers on the inner pipe. However, the aforementioned winding machine does not consider the adhesion between the fiber layers and the inner pipe, resulting in gaps and delamination during the winding process, with the layers not being well fused and bonded together. Summary of the Invention

[0004] Purpose of the Invention: To address the aforementioned problems, the purpose of this invention is to provide a multi-spiral tape winding machine for composite tubes, achieving control over winding speed, winding angle, heating temperature, tension, and continuous winding. It solves problems related to spiral angle, winding speed, tension, and temperature control during continuous glass fiber reinforced tape winding, thus realizing the continuous winding function of the winding machine. The invention also provides its operating method.

[0005] A multi-spiral tape winding machine for composite pipes includes a screw base device, a slide device, a gear transmission device, a rotary disk, a heating air gun mechanism, and an unwinding mechanism. The slide device is slidably connected to the upper part of the screw base device. The gear transmission device is installed on one side of the slide device. The rotary disk is inserted through the slide device on the other side and connected to the gear transmission device. A composite pipe mounting position is provided in the middle of the rotary disk. Multiple heating air gun mechanisms and unwinding mechanisms are provided in equal numbers. The multiple heating air gun mechanisms and unwinding mechanisms are circumferentially staggered around the composite pipe mounting position and are respectively connected to the same side of the rotary disk.

[0006] The inner and outer layers of the composite pipe are both made of high-density polyethylene, and the reinforcing layer is a continuous glass fiber reinforcing tape wound around.

[0007] Furthermore, the lead screw base device includes guide rails, ball screw, hollow base, and drive motor. The ball screw is installed in the middle of the hollow base, and a guide rail is provided parallel to each other on the opposite sides of the ball screw. The two ends of the guide rails are fixed to the hollow base. The drive motor is installed on the hollow base and connected to the ball screw. The slide device is mounted on the two guide rails and connected to the ball screw.

[0008] Furthermore, the slide device includes a slide, an L-shaped plate, a support block, and a clamping mechanism. The slide is slidably connected to the lead screw base device. The L-shaped plate and the support block are respectively installed on the upper surface of the slide. The L-shaped plate is close to the middle of the slide, and the support block is close to one side of the slide. On the side of the support block away from the L-shaped plate, multiple clamping mechanisms for clamping the composite pipe are installed circumferentially at intervals. The composite pipe passes through the support block and is located between the multiple clamping mechanisms. A gear transmission device is installed on the support block, and a rotating disk is installed on the L-shaped plate.

[0009] Ideally, the clamping mechanism includes a belt drive assembly, a lead screw pair, and a clamping roller. The belt drive assembly includes a synchronous pulley, a belt, and a belt motor. A synchronous pulley is mounted on the belt motor and the lead screw pair, and the two are connected by the belt. The belt motor and the lead screw pair are respectively mounted on the support block. The clamping roller is connected to the sliding block of the lead screw pair through a mounting bracket. The clamping roller faces the outer peripheral surface of the composite tube and is cross-shaped with it.

[0010] Furthermore, the gear transmission device includes a servo rotary motor, a reducer, a transmission pinion, and a transmission gear. The servo rotary motor is connected to the reducer and is mounted on the slide table. The transmission pinion is connected to the reducer's shaft, and the transmission gear is connected to the rotary disk and meshes with the transmission pinion.

[0011] Furthermore, the rotating disk has a circular disc structure. One side of the disk is provided with a heating mechanism mounting bracket for mounting the heating air gun mechanism and an unwinding mechanism mounting bracket for mounting the unwinding mechanism. The middle of the other side is provided with a cylindrical hollow protrusion. The hollow protrusion is coaxial with the composite tube mounting position in the middle of the rotating disk. The hollow protrusion passes through the slide device and is connected to the slide device through a rolling bearing. The outer circumferential surface of the end of the hollow protrusion is connected to the gear transmission device.

[0012] Furthermore, the heating gun mechanism includes a hand crank, a cover, an electric heating coil, an X-axis drive screw, a Z-axis drive screw, a Y-axis drive screw, and a heating gun. A hand crank is mounted on the rotating screws of the X-axis, Z-axis, and Y-axis drive screws respectively. One side of the Y-axis drive screw is fixed to the rotating disk, one side of the movable slider of the Y-axis drive screw is fixed to the Z-axis drive screw, and one side of the movable slider of the Z-axis drive screw is fixed to the X-axis drive screw. The X-axis, Y-axis, and Z-axis drive screws are spaced 90° apart from each other. The heating gun is mounted on the movable slider of the X-axis drive screw. The electric heating coil is installed inside the air duct of the heating gun. Two power cord holes are provided on the cover of the heating gun, and the power cord is connected to the electric heating coil through these holes.

[0013] The heating gun heats the fiberglass tape to be wound and the inner tube to be wound to over 350°C, so that the heated and melted fiber tape and the heated and melted inner tube surface are immediately bonded together; the air duct of the heating gun is inserted into the electric heating coil, and two holes are left on the cover of the electric heating coil to pass through the power cord. The controller controls the heating power of the coil and at the same time controls the fan to blow the hot air in the heating gun toward the heating and bonding area.

[0014] The X-axis of the heating air gun is along the traction direction of the pipeline. During production line operation, the X-axis position often needs to be constantly adjusted. The X, Y, and Z-axis position adjustments are all driven by a hand crank to move the heating air gun.

[0015] Furthermore, the unwinding mechanism includes a glass fiber reinforced tape roll, an unwinding shaft, a traction roller, a servo belt motor, a tension controller, a large unwinding gear, a small unwinding gear, a magnetic powder brake, and a tape storage reel. The tape storage reel is mounted on a rotary table, and the unwinding shaft is mounted on the tape storage reel via bearings. The glass fiber reinforced tape roll is mounted inside the tape storage reel via the unwinding shaft. One end of the unwinding shaft passes through the tape storage reel and is connected to the large unwinding gear. The small unwinding gear is connected to the magnetic powder brake and meshes with the large unwinding gear. One side of the glass fiber reinforced tape roll is provided with... The unwinding spool has parallel traction rollers, which include a driving roller and a driven roller arranged in parallel. One end of the driving roller is connected to a servo belt motor, which is installed on the back of the storage reel. A tension controller is installed behind the servo belt motor and detects the tension. The braking torque of the magnetic powder brake causes the fiber belt to loosen or tighten. One end of the driven roller is fixed to the storage reel. The reinforcing belt on the glass fiber reinforced belt roll passes between the driving roller and the driven roller and is wound around the composite tube. The driven roller presses the reinforcing belt tightly onto the driving roller.

[0016] Ideally, the heating air gun mechanism and the unwinding mechanism are arranged in pairs, with the heating air gun mechanism in each pair positioned diagonally behind the unwinding mechanism at an angle of 55° to 65°. The horizontal distance between the heating air gun mechanism and the unwinding mechanism is 350±5mm.

[0017] A method for operating the above-mentioned multi-spiral tape winding machine for composite pipes includes the following steps:

[0018] Step 1: The lead screw base device moves the slide device to the position where the composite tube to be processed begins to be wound;

[0019] Step 2: The composite tube to be processed passes through the composite tube mounting position in the middle of the rotating disk and the slide device in sequence, and is centered by the slide device, so that the composite tube to be processed is placed horizontally on the winding machine;

[0020] Step 3: Place the end of the glass fiber reinforced tape on each unwinding mechanism flat against the starting position of the composite tube to be processed, and adjust the position of the air gun mechanism to align it with the composite tube to be processed;

[0021] Step 4: Start the transmission device to drive the rotary table to rotate. At the same time, each unwinding mechanism starts to release the glass fiber reinforced tape. The glass fiber reinforced tape begins to wind around the outer circumference of the composite tube in circles along its length. Meanwhile, the slide device, driven by the screw base device, begins to move along the length of the composite tube away from the starting position of the winding.

[0022] Step 5: The air gun mechanism continues to heat the surface. After the glass fiber reinforced tape is wrapped around the outer circumference of the composite tube to be processed, the machine is stopped.

[0023] Beneficial effects: Compared with the prior art, the advantages of this invention are: the length of the triple-helix fiber tape wound in one loop is three times that of the single-helix tape, and the required winding speed is only one-third that of the single-helix tape, and the required tension is also only one-third that of the single-helix tape. Using triple-helix winding can effectively solve the problem of tensile deformation during the unwinding process of long fiber tapes and can ensure the continuity of winding.

[0024] This invention analyzes the manufacturing process of fiber-reinforced thermoplastic pipes and designs the structure of a triple-helix fiber winding machine based on the functional requirements of the triple-helix winding process. A servo motor is used to ensure the accuracy of the actuator's movements. This results in low manufacturing cost, high production efficiency, and good stability in the production of reinforced thermoplastic composite pipes.

[0025] This invention solves the problem of melt bonding by moving in the XYZ three directions, so that the fiberglass tape and inner tube reach the optimal temperature required for winding. Furthermore, the winding speed and tension of the fiberglass reinforced tape are controlled by a magnetic powder brake and a tension controller, thereby avoiding winding deformation and improving winding quality. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 This is a partial cross-sectional view of the present invention;

[0028] Figure 3 This is a schematic diagram of the rear-view three-dimensional structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the front three-dimensional structure of the present invention;

[0030] Figure 5 A three-dimensional structural diagram of the heating air gun mechanism;

[0031] Figure 6 This is a schematic diagram of the main structure of the heating air gun mechanism.

[0032] Figure 7 for Figure 6 The left view;

[0033] Figure 8 This is a schematic diagram of the unwinding mechanism;

[0034] Figure 9 A structural diagram of the clamping mechanism;

[0035] Figure 10 A schematic diagram showing the arrangement of supports for the heating mechanism and the unwinding mechanism on the rotary table. Detailed Implementation

[0036] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] A multi-spiral tape winding machine for composite pipes, such as Figures 1-10 As shown, it includes a lead screw base device 1, a slide device 2, a gear transmission device 3, a rotary disk 4, a heating air gun mechanism 5, and an unwinding mechanism 6.

[0038] The slide table device 2 is slidably connected to the upper part of the lead screw base device 1.

[0039] The lead screw base device 1 includes a guide rail 11, a ball screw 12, a hollow base 13, and a drive motor. The ball screw 12 is installed in the middle of the hollow base 13. A guide rail 11 is provided on each of the opposite sides of the ball screw 12 at a parallel interval. The two ends of the guide rail 11 are fixed to the hollow base 13. The drive motor is installed on the hollow base 13 and connected to the ball screw 12. The slide device 2 includes a slide 21, an L-shaped plate 22, a support block 23, and a gripping mechanism 24. The slide 21 is mounted on two guide rails 11 and connected to a ball screw 12. The L-shaped plate 22 and the support block 23 are respectively installed on the upper surface of the slide 21. The L-shaped plate 22 is close to the middle of the slide 21, and the support block 23 is close to one side of the slide 21. On the side of the support block 23 away from the L-shaped plate 22, a plurality of gripping mechanisms 24 for clamping the composite tube are installed circumferentially at intervals. The composite tube passes through the support block 23 and is located between the plurality of gripping mechanisms 24.

[0040] In this embodiment, there are three gripping mechanisms 24. Each gripping mechanism 24 includes a belt drive assembly 231, a lead screw pair 232, and a pressure roller 233. The belt drive assembly 231 is connected to the lead screw pair 232 and both are mounted on the support block 23. The belt drive assembly 231 includes a synchronous pulley 2311, a belt 2312, and a belt motor 2313. A synchronous pulley 2311 is mounted on the belt motor 2313 and the lead screw pair 232, and the two are connected by the belt 2312. The belt motor 2313 is mounted on the support block 23. The pressure roller 233 is connected to the sliding block of the lead screw pair 232 through a mounting bracket. The pressure roller 233 faces the outer peripheral surface of the composite tube and is cross-shaped with it.

[0041] The belt motor 2313 drives the belt drive 231, and the synchronous pulley 2311 and belt 2312 drive the screw slider 232 to control the linear motion of the pressing roller 233, thereby achieving the center fixation of the sizing inner tube (the composite tube to be processed).

[0042] The rotation of the ball screw 12 drives the components on the slide device 2 to move linearly back and forth, adjusting them to the appropriate winding position to enhance the processing of thermoplastic composite pipes.

[0043] The gear transmission device 3 is installed on one side of the support block 23, and the rotating disk 4 is installed on the L-shaped plate 22 and connected to the gear transmission device 3.

[0044] The gear transmission device 3 includes a servo rotary motor 31, a reducer 32, a small transmission gear 33, and a large transmission gear 34. The servo rotary motor 31 is connected to the reducer 32 and is respectively mounted on the slide device 2. The small transmission gear 33 is connected to the rotating shaft 321 of the reducer 32. The large transmission gear 34 is connected to the rotating disk 4 and meshes with the small transmission gear 33.

[0045] The rotating disk 4 has a circular disk-shaped structure. On one side, there is a heating mechanism mounting bracket 42 for mounting the heating air gun mechanism 5 and an unwinding mechanism mounting bracket 43 for mounting the unwinding mechanism 6. On the other side, there is a cylindrical hollow protrusion in the middle. The hollow protrusion is the composite tube mounting position of the rotating disk 4. The hollow protrusion is coaxial with the composite tube mounting position in the middle of the rotating disk 4. The hollow protrusion passes through the slide device 2 and is connected to the slide device 2 through the rolling bearing 221. The outer circumferential surface of the end of the hollow protrusion is connected to the transmission gear 34.

[0046] The servo rotary motor 31 drives the transmission pinion 33 to rotate through the reducer 32, and the transmission pinion 33 drives the transmission gear 34 to rotate, thereby driving the rotary disk 4 to rotate.

[0047] The rotating disk 4 is supported by rolling bearings 221 in the slide device 2. The large transmission gear 34 is connected to the rotating disk 4 through a keyway, which also serves to support the rotating disk 4. Stator slip rings 41 are installed on the rotating disk 4 to realize the power and signal transmission between the moving and stationary parts of the equipment.

[0048] Multiple heating air gun mechanisms 5 and unwinding mechanisms 6 are provided in equal numbers. These multiple heating air gun mechanisms 5 and unwinding mechanisms 6 are arranged circumferentially and alternately around the composite pipe mounting position, and are respectively connected to the same side of the rotating disk 4. In this embodiment, there are three heating air gun mechanisms 5 and three unwinding mechanisms 6, meaning this winding machine is a three-spiral tape winding machine.

[0049] The heating gun mechanism 5 includes a hand crank 51, a cover 52, an electric heating coil 53, an X-axis drive screw 54, a Z-axis drive screw 55, a Y-axis drive screw 56, and a heating gun 57. A hand crank 51 is mounted on the rotating screws of the X-axis drive screw 54, Z-axis drive screw 55, and Y-axis drive screw 56 respectively. One side of the Y-axis drive screw 56 is fixed to the heating mechanism mounting bracket 42, and one side of the movable slider of the Y-axis drive screw 56 is fixed to the Z-axis drive screw 55. One side of the movable slider of the moving lead screw 55 is fixed to the X-axis drive lead screw 54. The X-axis drive lead screw 54, Y-axis drive lead screw 56, and Z-axis drive lead screw 55 are arranged in pairs at 90° angles, i.e., in the form of three-dimensional coordinate axes. The heating air gun 57 is mounted on the movable slider of the X-axis drive lead screw 54. The electric heating coil 53 is installed in the air duct of the heating air gun 57. Two power cable through holes are provided on the cover 52 of the heating air gun 57. The power cable is connected to the electric heating coil 53 through the power cable through holes. There can be multiple heating air guns 57, that is, the heating air gun mechanism 5 has multiple heating nozzles.

[0050] The heating gun mechanism 5 moves in the X, Y, and Z directions to reach the desired heating temperature, allowing the inner tube and the continuous glass fiber tape to fuse together better; the unwinding mechanism 6 realizes the winding and tensioning of the continuous glass fiber tape.

[0051] Three evenly distributed heating air gun mechanisms 5 are installed on the heating mechanism support 42 of the rotating disk 4 of the present invention. The position of the heating air gun mechanism 5 is driven by the hand crank 51 to move the lead screw slider to adapt to different inner tube diameters.

[0052] The heating air gun mechanism 5 heats the section of the continuous glass fiber reinforced tape to be wound and the surface of the inner tube to be wound to above 350°C, causing the heated and molten continuous glass fiber reinforced tape and the heated and molten inner tube surface to bond immediately. An electric heating coil 53 is inserted into the air duct of the heating air gun. Two holes are left on the cover 52 of the electric heating coil for the power cord. The controller controls the heating power of the heating coil 53 and simultaneously controls the fan to blow the hot air inside the heating air gun mechanism 5 towards the heating and bonding area. Turning the hand crank only changes the position of the heating air gun outlet, controlling the X-axis of the heating air gun along the duct traction direction.

[0053] The unwinding mechanism 6 includes a glass fiber reinforced tape roll 61, an unwinding shaft 62, a traction roller 63, a servo belt motor 64, a tension controller 65, a large unwinding gear 66, a small unwinding gear 67, a magnetic powder brake 68, and a tape storage reel 69. The tape storage reel 69 is mounted on the unwinding mechanism mounting support 43. Both the tape storage reel 69 and the unwinding mechanism mounting support 43 are U-shaped structures. The two opposite outer surfaces of the tape storage reel 69 are fixed to the two opposite inner surfaces of the unwinding mechanism mounting support 43, and there is a gap between the tape storage reel 69 and the inner bottom surface of the unwinding mechanism mounting support 43. The unwinding shaft 62 is mounted on the tape storage reel 69 via bearings. The glass fiber reinforced tape roll 61 is mounted inside the tape storage reel 69 via the unwinding shaft 62. One end of the unwinding shaft 62 passes through the tape storage reel 69 and is connected to the large unwinding gear 66. Gear 67 is connected to magnetic powder brake 68 and meshes with unwinding gear 66. A traction roller 63 parallel to the unwinding shaft 62 is provided on one side of glass fiber reinforced tape roll 61. The traction roller 63 includes a driving roller 631 and a driven roller 632 arranged in parallel. One end of the driving roller 631 is connected to a servo belt motor 64. The servo belt motor 64 is installed on the back of the storage reel 69. The tension controller 65 is installed behind the servo belt motor 64. The tension controller 65 detects the tension. The braking torque of the magnetic powder brake 69 causes the fiber tape to loosen or tighten. One end of the driven roller 632 is fixed to the storage reel 69. The reinforcing tape on the glass fiber reinforced tape roll 61 passes between the driving roller 631 and the driven roller 632 and is wound around the composite tube. The driven roller 632 presses the reinforcing tape tightly onto the driving roller 631.

[0054] During the winding process, the hot air nozzle of the heating gun mechanism 5 simultaneously heats the continuous glass fiber tape and the inner tube to improve the bonding effect. Therefore, the heating gun mechanism 5 and the unwinding mechanism 6 are arranged in pairs. In each pair, the heating gun mechanism 5 is positioned diagonally behind the unwinding mechanism 6 and at an angle of 55° to 65°. The horizontal distance between the heating gun mechanism 5 and the unwinding mechanism 6 is 350±5mm to avoid interference.

[0055] In this embodiment, three evenly distributed unwinding mechanisms 6 are installed on the unwinding mechanism support 43 of the rotary disk 4, and the angle of the unwinding mechanism 6 can be adjusted by the angle motor to adapt to different winding helix angles.

[0056] Theoretically, the method for determining the helix angle θ is as follows:

[0057]

[0058] Where D is the diameter of the inner tube and W is the width of the continuous glass fiber reinforcement belt;

[0059] The three unwinding mechanisms 6 of the present invention must work simultaneously, and in order to ensure the symmetry and coordination of the winding, the three reels must rotate together with the rotating disk 4. The rotation speed of the unwinding pinion 67 is controlled by the magnetic powder brake 68, and the unwinding gear 66 drives the unwinding shaft 62 to rotate. A traction roller 63 is installed on the continuous glass fiber reinforced belt 61. The traction roller 63 is divided into an active roller and a passive roller. The active roller is driven by a servo belt motor 64, and the tension is controlled by a tension controller 65. The passive roller presses the continuous glass fiber reinforced belt 61 tightly onto the active roller.

[0060] Due to the stretchability of continuous glass fiber reinforced tape, the tension of the unwinding mechanism 6 of the continuous glass fiber reinforced tape must be less than 75N and the unwinding speed must be constant.

[0061] The aforementioned magnetic powder brake 68, together with the storage reel, servo guide motor 64, and tension controller 65, constitutes a tension control system. The controller outputs an adjustable voltage; the greater the current, the stronger the magnetic field formed by the coil of the magnetic powder brake 68, and the greater the output braking torque. When the tension control system detects a decrease in tension, it indicates that the belt is slack and the unwinding speed is too fast, requiring an increase in the braking torque of the magnetic powder brake 68 to re-tighten the continuous glass fiber reinforced belt. There is static friction between the continuous glass fiber reinforced belt and the traction roller 63, allowing the continuous glass fiber reinforced belt to unwind at a set speed.

[0062] Among them, the unwinding speed is equal to the winding speed, and the unwinding angle is equal to the winding helix angle;

[0063] At this time, the three unwinding mechanisms 6 are evenly distributed and simultaneously unwind and wind, with a winding speed V. w Inner tube traction speed V tThe relationship between the helix angle θ is:

[0064]

[0065] The inner and outer tubes of the aforementioned reinforced thermoplastic composite pipe are both made of high-density polyethylene, and the reinforcing layer is a continuous glass fiber reinforcing tape wound around. All six actuators are mounted on the rotating disk 4 and rotate with the disk. The rotation speed of the rotating disk 4 must be matched with the pipe traction speed, tension, helix angle, and heating temperature.

[0066] In summary, this invention places high demands on the matching of winding speed with helix angle, heating temperature, and pipe traction speed; the key reinforcing layer winding technology for reinforced thermoplastic composite pipes, this invention can achieve low manufacturing cost, high production efficiency, and good processing quality and stability of reinforced thermoplastic composite pipes.

[0067] The working method of the above-mentioned multi-spiral tape winding machine for composite pipes includes the following steps:

[0068] Step 1: Considering the continuous winding requirements, the slide plate device needs to be moved to the optimal position for starting the winding of the inner tube. The drive motor then uses the ball screw helical transmission method to move the slide plate device to the appropriate winding position.

[0069] Step Two: One end of the inner layer tube (the composite tube to be processed) is fixed by other workpieces, and the other end passes sequentially through the composite tube mounting position in the center of the rotating disk, the slide device, and then is fixed by another workpiece, so that the composite tube to be processed is horizontally placed on the winding machine. The clamping mechanism supports and clamps the inner layer tube and performs center positioning. The belt motor drives the belt drive, and the screw pair drives the pressure roller to move up and down through the screw drive to fix and position the inner layer tube in the center, ensuring the winding quality. The pressure roller can slide on the outer wall of the inner layer tube, and the center line of the inner layer tube is kept constant by three clamping mechanisms.

[0070] Step 3: Flatly attach the end of the glass fiber reinforced tape on each unwinding mechanism to the starting position of the composite tube to be processed, and adjust the position of the air gun mechanism to align it with the composite tube to be processed.

[0071] Step 4: The gear transmission device drives the rotating disk to rotate, starting the servo rotary motor. The reducer drives the small transmission gear, which in turn drives the large transmission gear, thus driving the rotating disk to rotate. The servo motor ensures precise winding speed. Simultaneously, each unwinding mechanism starts releasing the glass fiber reinforced tape. The glass fiber reinforced tape begins to wind around the outer circumference of the composite tube, circle by circle. The glass fiber reinforced tape roll is released from the storage reel. The active roller is driven by the servo guide motor, and the passive roller presses the fiber tape tightly against the active roller. During the unwinding process, the servo guide motor operates continuously, transmitting unwinding force to the fiber tape through the static friction between the unwinding roller and the fiber tape. As the diameter of the fiber tape coil decreases, the tension also gradually decreases. When the tension controller detects a decrease in tension, it indicates that the tape is loose and the unwinding speed is too fast. The braking torque of the magnetic powder brake needs to be increased to tighten the fiber tape again. The magnetic powder brake, through gear transmission, drives the large unwinding gear to control the tension of the glass fiber reinforced tape roll, completing the winding of the reinforcing layer.

[0072] Step 5: As the glass fiber reinforced tape is wound, the slide table device, driven by the screw base device, also begins to move along the length of the composite tube towards a position away from the starting position of the composite tube winding.

[0073] Step Six: The air gun mechanism continues to heat the surface. After the glass fiber reinforced tape is wrapped around the outer circumference of the composite tube to be processed, the machine is stopped.

Claims

1. A multi-spiral tape winding machine for composite pipes, characterized in that: The device includes a lead screw base device (1), a slide table device (2), a gear transmission device (3), a rotary disk (4), a heating air gun mechanism (5), and an unwinding mechanism (6). The slide table device (2) is slidably connected to the upper part of the lead screw base device (1). The gear transmission device (3) is installed on one side of the slide table device (2). The rotary disk (4) is inserted through the slide table device (2) on the other side and connected to the gear transmission device (3). The rotary disk (4) has a composite tube mounting position in the middle. The heating air gun mechanism (5) and the unwinding mechanism (6) are each provided in threes. Multiple heating air gun mechanisms (5) and unwinding mechanisms (6) are circumferentially spaced and staggered around the composite tube mounting position and are respectively connected to the same side of the rotary disk (4). The heating gun mechanism (5) includes a hand crank (51), a cover (52), an electric heating coil (53), an X-axis drive screw (54), a Z-axis drive screw (55), a Y-axis drive screw (56), and a heating gun (57). A hand crank (51) is installed on the rotating screw of the X-axis drive screw (54), the Z-axis drive screw (55), and the Y-axis drive screw (56). One side of the Y-axis drive screw (56) is fixed to the rotating disk (4), one side of the sliding block of the Y-axis drive screw (56) is fixed to the Z-axis drive screw (55), and one side of the sliding block of the Z-axis drive screw (55) is fixed to the X-axis drive screw (57). The transmission screw (54) is fixed. The X-axis transmission screw (54), Y-axis transmission screw (56) and Z-axis transmission screw (55) are spaced at 90° to each other. There are multiple heating guns (57). The heating guns (57) are installed on the movable slider of the X-axis transmission screw (54). The electric heating coil (53) is installed in the air duct of the heating gun (57). Two power line holes are left on the cover (52) of the heating gun (57). The power line is connected to the electric heating coil (53) through the power line holes. During the winding process, the hot air port of the heating gun mechanism (5) heats the continuous glass fiber reinforced tape and the inner tube at the same time. The unwinding mechanism (6) includes a glass fiber reinforced tape roll (61), an unwinding shaft (62), a traction roller (63), a servo belt motor (64), a tension controller (65), a large unwinding gear (66), a small unwinding gear (67), a magnetic powder brake (68), and a tape storage reel (69). The tape storage reel (69) is mounted on a rotating disk (4). The unwinding shaft (62) is mounted on the tape storage reel (69) via bearings. The glass fiber reinforced tape roll (61) is mounted inside the tape storage reel (69) via the unwinding shaft (62). One end of the unwinding shaft (62) passes through the tape storage reel (69) and is connected to the large unwinding gear (66). The small unwinding gear (67) is connected to the magnetic powder brake (68) and meshes with the large unwinding gear (66). One side of the glass fiber reinforced tape roll (61) is provided with a connection to the unwinding shaft. The traction roller (63) is parallel to the reel (62). The traction roller (63) includes a driving roller (631) and a passive roller (632) arranged in parallel. One end of the driving roller (631) is connected to the servo belt motor (64). The servo belt motor (64) is installed on the back of the storage reel (69). The tension controller (65) is installed behind the servo belt motor (64). The tension controller (65) detects the tension. The braking torque of the magnetic powder brake (68) causes the fiber reinforced belt to loosen or tighten. One end of the passive roller (632) is fixed to the storage reel (69). The reinforcing belt on the glass fiber reinforced belt roll (61) passes between the driving roller (631) and the passive roller (632) and is wound around the composite tube. The passive roller (632) presses the reinforcing belt tightly onto the driving roller (631). The heating air gun mechanism (5) and the unwinding mechanism (6) are arranged in pairs; During the winding process, the three unwinding mechanisms (6) are evenly distributed and simultaneously unwind and wind, with a winding speed V. w Inner tube traction speed V t The relationship between the winding helix angle θ is: 。 2. The multi-spiral tape winding machine for composite pipes according to claim 1, characterized in that: The lead screw base device (1) includes a guide rail (11), a ball screw (12), a hollow base (13), and a drive motor. The ball screw (12) is installed in the middle of the hollow base (13). A guide rail (11) is provided parallel to each other on the opposite sides of the ball screw (12). The two ends of the guide rail (11) are fixed to the hollow base (13). The drive motor is installed on the hollow base (13) and connected to the ball screw (12). The slide device (2) is mounted on the two guide rails (11) and connected to the ball screw (12).

3. The multi-spiral tape winding machine for composite pipes according to claim 1, characterized in that: The slide plate device (2) includes a slide plate (21), an L-shaped plate (22), a support block (23), and a gripping mechanism (24). The slide plate (21) is slidably connected to the screw base device (1). The L-shaped plate (22) and the support block (23) are respectively installed on the upper surface of the slide plate (21). The L-shaped plate (22) is close to the middle of the slide plate (21), and the support block (23) is close to one side of the slide plate (21). Multiple gripping mechanisms (24) for clamping the composite pipe are installed circumferentially at intervals on the side of the support block (23) away from the L-shaped plate (22). The composite pipe passes through the support block (23) and is located between the multiple gripping mechanisms (24). The gear transmission device (3) is installed on the support block (23), and the rotating disk (4) is installed on the L-shaped plate (22).

4. A multi-spiral tape winding machine for composite pipes according to claim 3, characterized in that: The clamping mechanism (24) includes a belt drive assembly (231), a lead screw pair (232), and a clamping roller (233). The belt drive assembly (231) includes a synchronous pulley (2311), a belt (2312), and a belt motor (2313). A synchronous pulley (2311) is installed on the belt motor (2313) and the lead screw pair (232), and the two are connected by the belt (2312). The belt motor (2313) and the lead screw pair (232) are respectively installed on the support block (23). The clamping roller (233) is connected to the sliding block of the lead screw pair (232) through a mounting bracket. The clamping roller (233) faces the outer peripheral surface of the composite tube and is cross-shaped with it.

5. A multi-spiral tape winding machine for composite pipes according to claim 1, characterized in that: The gear transmission device (3) includes a servo rotary motor (31), a reducer (32), a transmission pinion (33), and a transmission gear (34). The servo rotary motor (31) is connected to the reducer (32) and is installed on the slide device (2). The transmission pinion (33) is connected to the shaft (321) of the reducer (32). The transmission gear (34) is connected to the rotating disk (4) and meshes with the transmission pinion (33).

6. A multi-spiral tape winding machine for composite pipes according to claim 1, characterized in that: The rotating disk (4) is a circular disk structure. On one side, there is a heating mechanism mounting bracket (42) for mounting the heating air gun mechanism (5) and an unwinding mechanism mounting bracket (43) for mounting the unwinding mechanism (6). On the other side, there is a cylindrical hollow protrusion in the middle. The hollow protrusion is coaxial with the composite tube mounting position in the middle of the rotating disk (4). The hollow protrusion passes through the slide device (2) and is connected to the slide device (2) through the rolling bearing (221). The outer circumference of the end of the hollow protrusion is connected to the gear transmission device (3).

7. A multi-spiral tape winding machine for composite pipes according to claim 1, characterized in that: The heating air gun mechanism (5) in each pair is positioned diagonally behind the unwinding mechanism (6) and at an angle of 55° to 65° to the unwinding mechanism (6). The horizontal distance between the heating air gun mechanism (5) and the unwinding mechanism (6) is 350±5mm.

8. A method for operating a multi-spiral tape winding machine for composite pipes as described in any one of claims 1 to 7, characterized in that... Includes the following steps: Step 1: The lead screw base device (1) moves the slide device (2) to the position where the composite tube to be processed begins to be wound; Step 2: The composite tube to be processed passes through the composite tube mounting position in the middle of the rotating disk (4) and the slide device (2) in sequence, and is centered by the slide device (2) so that the composite tube to be processed is placed horizontally on the winding machine; Step 3: Place the ends of the glass fiber reinforced tapes on each unwinding mechanism (6) flat at the starting position of the composite tube to be processed, and adjust the position of the air gun mechanism (5) so that it is aligned with the composite tube to be processed. Step 4: Start the transmission device (3) to drive the rotating disk (4) to rotate. At the same time, each unwinding mechanism (6) starts to release the glass fiber reinforced tape. The glass fiber reinforced tape begins to wind around the outer circumference of the composite tube in circles along the length direction. Meanwhile, the slide device (2) starts to move away from the starting position of the composite tube along the length direction of the composite tube under the drive of the screw base device (1). Step 5: The air gun mechanism (5) continues to heat the glass fiber reinforced tape, and then the machine is stopped after the glass fiber reinforced tape is wrapped around the outer circumference of the composite tube to be processed.

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