A method for applying fiber twisting in braided, wound, and pultruded pipes

Abstract

This invention provides a method for applying fiber twisting in braided, wound, and pultruded pipes, comprising: passing high-strength fibers through a yarn frame in a high-low order; using a ring twisting machine to twist untwisted fiber bundles into twisted fiber bundles through a braiding tube; winding a circular fiber bundle with a winding machine to form a winding layer on the surface of a mandrel; loading the twisted fiber tubes onto each spindle of a braiding machine for weaving, forming a braided layer on the surface of the winding layer; then injecting thermosetting unsaturated resin through a heated mold, setting the temperature of different areas through a mold heating system to cure and mold the product; and finally demolding and pulling the product out using a traction machine. The surface of the twisted high-performance fiber bundle is smooth, making it wear-resistant and less prone to fuzzing during weaving, thus significantly reducing the yarn breakage rate and reducing the labor intensity of workers changing yarns. The amount of fuzzing in the twisted high-performance fiber yarn is also reduced, thus reducing the pollution of the working environment by the high-performance fiber fuzz.

Description

Technical Field

[0001] This invention relates to the technical field of composite material pultrusion molding application methods, specifically a method for applying fiber twisting in the braiding and winding of pultruded pipes. Background Technology

[0002] Currently, composite braided pultruded pipe products are mostly produced using high-performance fibers of different gauges through a braiding-winding-pultrusion composite process. While this process allows for continuous, large-scale production, high-performance fiber bundles of different gauges consist of thousands of individual filaments with diameters of a few micrometers. The higher the gauge, the more individual filaments are present. The inherent characteristics of high-performance fibers—high modulus, brittleness, and poor abrasion resistance—lead to fuzzing and yarn breakage during the braiding and winding process. This necessitates frequent machine stops for yarn replacement, impacting both production efficiency and product quality. Furthermore, the fiber fuzz floating in the air pollutes the environment, affects worker occupational health, and disrupts stable equipment operation. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this invention discloses a method for applying fiber twisting in braided pultruded pipes, comprising the following steps:

[0004] Step 1: Pass the high-strength fibers through the yarn frame in descending order;

[0005] Step 2: Use a ring twisting machine to twist untwisted fiber bundles into twisted fiber bundles through a braided yarn tube;

[0006] Step 3: The winding machine winds a circular fiber bundle to form a winding layer on the surface of the mandrel;

[0007] Step 4: Load the twisted fiber yarn bobbin onto each spindle of the braiding machine for weaving, forming a braided layer on the surface of the winding layer;

[0008] Step 5: Then, thermosetting unsaturated resin is injected into the heated mold, and the product is cured and molded by setting the temperature of different areas through the mold heating system.

[0009] Step 6: Pull the product out of the mold using a traction machine.

[0010] Preferably, the high-strength fiber in step 1 is a high-performance fiber.

[0011] Preferably, the untwisted fiber bundle in step 2 is a flat single-strand 1200tex fiber bundle, and the twisted fiber bundle is a round single-strand 1200tex fiber bundle with a twist of 28 twists / m and a twist direction of Z twist.

[0012] Preferably, the traction machine, heating mold, braiding machine, winding machine, and yarn frame are arranged in sequence according to the traction direction of the traction machine. The heating mold is installed on the mold lifting platform, and the core mold is connected to the core mold clamping device. The core mold is set in correspondence with the heating mold, braiding machine, and winding machine.

[0013] Preferably, the yarn frame is provided with a number of positioning holes, and a number of bearings are installed in the positioning holes. The bearings are rotatably connected to the mounting shaft, and the mounting shaft is connected to the yarn bobbin. The yarn bobbin is a segmented yarn bobbin, which includes a number of bobbin bodies. The inside of each bobbin body is provided with a through hole, which is engaged with the mounting shaft.

[0014] Preferably, two adjacent cylinders are connected by a convenient connection mechanism. The convenient connection mechanism includes annular grooves symmetrically arranged at the front and rear ends of the cylinders, and a fixing ring is fixedly installed at one end of the cylinder. A magnetic ring is installed in the annular groove near the fixing ring. The fixing ring has an opening that communicates with a through hole. The cylinder is provided with an installation groove at the end away from the fixing ring. The installation groove cooperates with the fixing ring of the adjacent cylinder. A magnetic ring is installed in the annular groove near the installation groove. The magnetic rings attract each other. The fixing ring is fixedly installed in the installation groove.

[0015] Preferably, the end of the fixing ring one away from the cylinder is provided with a plurality of arc-shaped grooves arranged in a circumferential array. The arc-shaped grooves are slidably connected to the connecting block one. The connecting block one is fixedly connected to the connecting block two. The end of the fixing ring two away from the through hole is provided with a plurality of guide grooves arranged in a circumferential array. The guide grooves cooperate with the connecting block one and the connecting block two. The guide grooves are correspondingly connected to the cooperating grooves. A sliding block is slidably provided in the cooperating groove. The sliding block is fixedly connected to the spring one. The spring one is in contact with the connecting block two.

[0016] Preferably, the convenient connection mechanism further includes a fixing ring. The inner ring of the fixing ring is fixedly connected to the outer side of the cylinder near the magnetic ring one. The fixing ring is evenly provided with a plurality of fixing holes in its circumference. The fixing holes are respectively engaged with a fixing rod. The fixing rod is fixedly connected to the mating block one. The mating block one is slidably disposed on the outer side of the cylinder near the magnetic ring two. The mating block one is slidably connected to the mating block two. The mating block two penetrates the side end of the cylinder and enters the mating groove. The mating block two is fixedly connected to the sliding block. The mating groove is connected to the left and right sides of the mounting groove.

[0017] Preferably, a detachable mechanism is installed on the mounting shaft. The detachable mechanism includes a working chamber 1, a working chamber 2, and a working chamber 3 inside the mounting shaft. The upper end of the working chamber 1 is rotatably connected to a rotating shaft 1. The rotating shaft 1 is fixedly connected to a pulley 1 and a worm gear 1. The worm gear 1 is rotatably connected to the lower end of the working chamber 1. Worm wheels 1 are meshed on the left and right sides of the worm gear 1, respectively. The worm wheels 1 are threadedly connected to a threaded sleeve 1. The threaded sleeve 1 is threadedly connected to the threaded section of a threaded rod 1. The cylindrical end of the threaded rod 1 is rotatably connected to a rotating rod 1. The end of the rotating rod 1 away from the threaded rod 1 is rotatably connected to an extrusion block. The extrusion block passes through the side end of the working chamber 1 and is fixedly connected to the middle of the elastic strip. The front and rear ends of the elastic strip are slidably connected to the mounting shaft.

[0018] The front end of the second working chamber is connected to the left and right sides by buffer grooves. Buffer blocks are slidably arranged in the buffer grooves, and springs are fixedly arranged between the buffer blocks and the buffer grooves. The end of the buffer block away from springs is rotatably connected to the connecting rod. The connecting rod is fixedly connected to worm gears. Worms mesh with worms and are fixedly connected to threaded sleeves. Threaded sleeves are threadedly connected to the threaded section of threaded rods. The cylindrical section of threaded rods is slidably connected to rotating rods. The middle part of rotating rods is rotatably connected to a support rod. The support rod is fixedly arranged at the rear end of the second working chamber. A sliding cavity is provided through the side of rotating rods away from threaded rods. The sliding cavity is slidably connected to a sliding shaft. The sliding shaft is rotatably connected to the mounting rod.

[0019] Working chamber three is connected to the through port, which is located on the left and right sides of the rear end of working chamber two. The mounting rod passes through the through port and is fixedly connected to guide block one. Guide block one is slidably connected to guide block two. Guide block two is slidably located in working chamber three, and the end of guide block two away from guide block one is fixedly connected to the fixing rod. The fixing rod is slidably connected to the fixing block in working chamber three, and the side end of the fixing rod passes through working chamber three and is connected to the outside. The end of the fixing rod away from guide block two is rotatably connected to the guide ball. The guide ball contacts the annular groove two, which is located in the positioning hole on the yarn frame. Pulley one and worm gear two are both driven by independent drive mechanisms.

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the untwisted fiber bundle and twisted fiber bundle structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the twisted fiber bundle twisting structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the yarn frame 8 structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the yarn tube 82 structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the cylindrical body 821 structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the fixing ring structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the fixed ring two structure of the present invention;

[0030] Figure 9 for Figure 5 A magnified structural diagram of region A in the diagram;

[0031] Figure 10 This is a schematic diagram of the detachable mechanism connection structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the internal structure of the detachable mechanism of the present invention;

[0033] Figure 12 This is a schematic diagram of the internal structure of the working chamber II of the present invention.

[0034] In the diagram: 1. Traction machine; 100. Untwisted fiber bundle; 200. Twisted fiber bundle; 2. Product; 3. Mold lifting platform; 4. Heated mold; 5. Braiding machine; 6. Winding machine; 7. Core mold; 8. Yarn frame; 81. Mounting shaft; 82. Yarn bobbin; 83. Fixing ring one; 84. Opening one; 85. Arc groove; 86. Connecting block one; 87. Fixing ring two; 88. Opening two; 89. Guide groove; 810. Mounting groove; 811. Mating groove; 812. Magnetic ring one; 813. Magnetic ring two; 814. Fixing ring; 815. Fixing hole; 816. Fixing rod; 817. Mating block one; 818. Connecting block two; 819. Sliding block; 820. Spring one; 821. Cylinder; 822. Mating block two; 9. Core mold clamping device; 10. Fiber yarn; 11. Elastic strip; 111. Rough block; 12. Extrusion block; 13. Rotating rod one; 1 4. Threaded rod one; 15. Threaded sleeve one; 16. Worm gear one; 17. Worm one; 18. Rotating shaft one; 19. Pulley one; 20. Conveyor belt; 21. Working chamber one; 22. Working chamber two; 23. Working chamber three; 24. Through port; 25. Buffer groove; 26. Spring two; 27. Buffer block; 28. Connecting rod; 29. ​​Pulley two; 30. Worm two; 31. Worm gear two; 32. Threaded sleeve two; 33. Threaded rod two 34. Rotating rod II; 35. Sliding cavity; 36. Sliding shaft; 37. Guide block I; 38. Guide block II; 39. Fixed rod; 40. Fixed block; 41. Support rod; 42. Groove; 43. Electromagnetic block; 44. Spring IV; 45. Magnetic block; 46. Telescopic rod; 47. Locking block; 48. Rotating sleeve; 49. Locking groove; 50. Connecting hole; 51. Drive block; 52. Fixed sleeve; 53. Guide ball; 54. Bearing. Detailed Implementation

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] The present invention provides the following embodiments.

[0038] Example 1

[0039] This invention provides a method for applying fiber twisting in the braiding, winding, and pultrusion of pipes, such as... Figure 1-3 As shown, it includes the following steps:

[0040] Step 1: Pass the high-strength fiber yarn 10 through the yarn frame 8 in a high-low order;

[0041] Step 2: Using a ring twisting machine, twist 100 into a twisted fiber bundle of 200 through a braided yarn tube;

[0042] Step 3: The winding machine 6 winds a circular fiber bundle to form a winding layer on the surface of the mandrel 7;

[0043] Step 4: Load the twisted fiber yarn bobbin onto each of the 5 spindles of the braiding machine for weaving, forming a braided layer on the surface of the winding layer;

[0044] Step 5: Then, thermosetting unsaturated resin is injected into the heated mold 4, and the product 2 is cured and molded by setting the temperature of different areas through the mold heating system.

[0045] Step 6: Pull product 2 out of the mold using traction machine 1;

[0046] The high-strength fiber in step 1 is a high-performance fiber;

[0047] In step 2, the untwisted fiber bundle 100 is a flat, single-strand 1200tex fiber bundle, and the twisted fiber bundle 200 is a round, single-strand 1200tex fiber bundle with a twist of 28 twists / m and a twist direction of Z.

[0048] The traction machine 1, heating mold 4, braiding machine 5, winding machine 6, and yarn frame 8 are arranged in sequence according to the traction direction of the traction machine 1. The heating mold 4 is installed on the mold lifting platform 3. The core mold 7 is connected to the core mold clamping device 9. The core mold 7 is arranged in correspondence with the heating mold 4, braiding machine 5, and winding machine 6.

[0049] The beneficial effects of the above technical solution are as follows:

[0050] By threading high-strength fibers through the yarn frame 8 in a high-low order, fiber cross-linking can be avoided. The 1200tex high-performance fiber bundles after twisting have a smooth surface, making them relatively wear-resistant and less prone to fuzzing during weaving on the braiding machine 5. This significantly reduces the yarn breakage rate, decreasing the labor intensity of workers changing yarn. The reduced fuzzing of the twisted high-performance fiber yarn also reduces air pollution caused by high-performance fiber fuzz, avoiding waste of high-performance fiber raw yarn. Furthermore, it reduces yarn breakage caused by fuzzing, which can lead to interruptions in subsequent weaving preforms during glue injection, or even mold blockage and machine failure. This improves the surface quality of the pultruded product 2, thereby greatly increasing production efficiency. This solves the technical problems caused by the inherent characteristics of high-performance fibers—high modulus, brittleness, and poor wear resistance—leading to severe fuzzing and yarn breakage in subsequent weaving processes. Fiber fuzz floating in the air not only pollutes the environment but also causes significant fiber waste, increases production costs, increases labor intensity for workers due to frequent yarn changes, and results in poor surface texture and low economic efficiency in the woven power pipe preforms.

[0051] Example 2

[0052] Based on Example 1, such as Figure 4-9 As shown, the yarn frame 8 is provided with a number of positioning holes in an array, and a number of bearings 54 are installed in the positioning holes. The bearings 54 are rotatably connected to the mounting shaft 81. The mounting shaft 81 is connected to the yarn tube 82. The yarn tube 82 is a segmented yarn tube. The yarn tube 82 includes a number of tube bodies 821. The inside of the tube body 821 is provided with a through hole, which is engaged with the mounting shaft 81.

[0053] Two adjacent cylinders 821 are connected by a convenient connection mechanism. The convenient connection mechanism includes annular grooves symmetrically arranged at the front and rear ends of the cylinders 821. A fixing ring 83 is fixedly installed at one end of the cylinder 821. A magnetic ring 812 is installed in the annular groove near the fixing ring 83. The fixing ring 83 has an opening 84 that is through it and communicates with a through hole. The cylinder 821 is provided with a mounting groove 810 at the end away from the fixing ring 83. The mounting groove 810 cooperates with the fixing ring 83 of the adjacent cylinder 821. A magnetic ring 813 is installed in the annular groove near the mounting groove 810. The magnetic ring 812 and the magnetic ring 813 attract each other. A fixing ring 87 is fixedly installed in the mounting groove 810. The fixing ring 87 has an opening 88 that is through it and communicates with a through hole.

[0054] The fixed ring 83, at the end furthest from the cylinder 821, is provided with a plurality of arc-shaped grooves 85 arranged in a circumferential array. The arc-shaped grooves 85 are slidably connected to the connecting block 86, and the connecting block 86 is fixedly connected to the connecting block 818. The fixed ring 87, at the end furthest from the through hole, is provided with a plurality of guide grooves 89 arranged in a circumferential array. The guide grooves 89 cooperate with the connecting block 86 and the connecting block 818. The guide grooves 89 are correspondingly connected to the mating groove 811. A sliding block 819 is slidably provided in the mating groove 811. The sliding block 819 is fixedly connected to the spring 820, and the spring 820 is in contact with the connecting block 818.

[0055] The convenient connection mechanism also includes a fixing ring 814. The inner ring of the fixing ring 814 is fixedly connected to the outer side of the cylinder 821 near the magnetic ring 812. The fixing ring 814 is evenly provided with a number of fixing holes 815 around its circumference. The fixing holes 815 are respectively engaged with the fixing rod 816. The fixing rod 816 is fixedly connected to the first mating block 817. The first mating block 817 is slidably disposed on the outer side of the cylinder 821 near the magnetic ring 813. The first mating block 817 is slidably connected to the second mating block 822. The second mating block 822 passes through the side end of the cylinder 821 and enters the mating groove 811. The second mating block 822 is fixedly connected to the sliding block 819. The mating groove 811 is connected to the left and right sides of the mounting groove 810.

[0056] The beneficial effects of the above technical solution are as follows:

[0057] Openings 84 and 88 are used to pass through the mounting shaft 81. The yarn bobbin 82 has a segmented design, which can change the number of yarn bobbins 82 on the mounting shaft 81, suitable for the production of different products. The yarn bobbin 82 is divided into several bobbins 821, each bobbin 821 being a small yarn bobbin. The number of separate yarn bobbins 82 is adjustable, thereby changing the total number of yarn bobbins that can be hung on the entire yarn frame 8. The number of yarn bobbins 82 is adjusted according to the number of yarns required for fabric weaving in production. When connecting two adjacent bobbins 821, the fixing ring 83 on the rear bobbin 821 is inserted into the mounting groove 810 on the front bobbin 821. Magnetic ring 1 812 and magnetic ring 2 813 attract each other, connecting two adjacent cylinders 821. At this time, connecting block 1 86 and connecting block 2 818 engage with guide groove 89. Then, rotating the rear cylinder 821 causes the fixing ring 1 83 to rotate. The rotation of fixing ring 1 83 causes the arc groove 85 to rotate. The arc groove 85 causes connecting block 1 86 and connecting block 2 818 to move. Guide groove 89 guides the movement of connecting block 1 86 and connecting block 2 818. Connecting block 2 818 enters the mating groove 811 and contacts spring 1 820. Connecting block 2 818 first compresses spring 1 820, and then... When compressed to a certain extent, the sliding block 819 is pushed to slide along the mating groove 811. The sliding block 819 drives the mating block 2 822 to move. The mating block 2 822 pushes the mating block 1 817 to slide along the outside of the cylinder 821. The mating block 1 817 drives the fixed rod 816 to move. During the rotation of the rear cylinder 821, the fixed ring 814 is driven to rotate. During this process, the fixed ring 814 contacts the fixed rod 816. The spring 1 820 is continuously compressed until the fixing hole 815 on the fixed ring 814 corresponds to the fixed rod 816. Under the elastic action of the spring 1 820, the fixing hole 815 and the fixed rod 816 are aligned. With the engagement of rod 816, the rear cylinder 821 can no longer rotate. Under the combined action of connecting block 2 818 and mating groove 811, magnetic ring 1 812 and magnetic ring 2 813, fixing hole 815 and fixing rod 816, the rear cylinder 821 and the front cylinder 821 are installed. Through the connection and engagement of the above three sets of parts, the connection stability between the two adjacent cylinders 821 is improved, and the connection is convenient. Only the rear cylinder 821 needs to be rotated. When disassembling the two adjacent cylinders 821, the fixing rod 816 is pulled out of the fixing hole 815, and then the rear cylinder 821 is rotated in the opposite direction. The operation is convenient and quick.

[0058] Example 3

[0059] Based on Example 2, such as Figure 10-12As shown, a detachable mechanism is installed on the mounting shaft 81. The detachable mechanism includes a first working chamber 21, a second working chamber 22, and a third working chamber 23 disposed inside the mounting shaft 81. The first working chamber 21 is fixedly disposed inside the front side of the mounting shaft 81. The upper end of the first working chamber 21 is rotatably connected to the rotating shaft 18. The rotating shaft 18 is fixedly connected to the pulley 19 and the worm gear 17. The worm gear 17 is rotatably connected to the lower end of the first working chamber 21. Worm wheels 16 are meshed on the left and right sides of the worm gear 17, and the worm wheels 16 are threadedly connected to the threaded sleeve 15. The threaded sleeve 15 is threadedly connected to the threaded section of the threaded rod 14. The cylindrical end of the threaded rod 14 is rotatably connected to the rotating rod 13. The end of the rotating rod 13 away from the threaded rod 14 is rotatably connected to the extrusion block 12. The side end of the extrusion block 12, which passes through the working cavity 21, is fixedly connected to the middle of the elastic strip 11. The extrusion block 12 is slidably connected to the mounting shaft 81. The front and rear ends of the elastic strip 11 are slidably connected to the mounting shaft 81. Several rough blocks 111 are evenly distributed on the end of the elastic strip 11 away from the mounting shaft 81. The rough blocks 111 are in contact with the through hole.

[0060] The front end of the working chamber 22 is connected to the left and right sides of the buffer groove 25. The buffer block 27 is slidably provided in the buffer groove 25, and the buffer block 27 and the buffer groove 25 are fixedly provided with the spring 26. The end of the buffer block 27 away from the spring 26 is rotatably connected to the connecting rod 28. The connecting rod 28 is fixedly connected to the worm gear 31. The worm gear 31 meshes with the worm 30 and is fixedly connected to the threaded sleeve 32. The threaded sleeve 32 is threadedly connected to the threaded section of the threaded rod 33. The cylindrical section of the threaded rod 33 is slidably connected to the rotating rod 34. The middle part of the rotating rod 34 is rotatably connected to the support rod 41. The support rod 41 is fixedly set at the rear end of the working chamber 22. The side of the rotating rod 34 away from the threaded rod 33 is provided with a sliding cavity 35. The sliding cavity 35 is slidably connected to the sliding shaft 36. The sliding shaft 36 is rotatably connected to the mounting rod.

[0061] Working chamber 3 23 is connected to through port 24, which is located on the left and right sides of the rear end of working chamber 2 22. The mounting rod passes through through port 24 and is fixedly connected to guide block 1 37. Guide block 1 37 is slidably connected to guide block 2 38. Guide block 2 38 is slidably located in working chamber 3 23, and the end of guide block 2 38 away from guide block 1 37 is fixedly connected to fixing rod 39. Fixing rod 39 is slidably connected to fixing block 40 in working chamber 3 23, and the side end of fixing rod 39 passes through working chamber 3 23 and is connected to the outside. The end of fixing rod 39 away from guide block 2 38 is rotatably connected to guide ball 53. Guide ball 53 contacts annular groove 2, which is located in the positioning hole on yarn frame 8. Pulley 1 19 and worm gear 2 30 are both driven by independent drive mechanisms.

[0062] The beneficial effects of the above technical solution are as follows:

[0063] By installing a detachable mechanism on the mounting shaft 81, it is convenient to install the mounting shaft 81 at different positions on the yarn frame 8. The position of the mounting shaft 81 can be adjusted according to different raw yarn bobbins or weaving needs, thereby adjusting the position of the yarn bobbins 82. This avoids the limitation on the height and length of the yarn bobbins 82 that can be used during weaving due to the fixed spacing of the yarn bobbins 82. When adjusting the position of the mounting shaft 81, the rear part of the mounting shaft 81 is inserted into the positioning hole. At this time, the fixing rod 39 is correspondingly set with the annular groove 2. The worm gear 2 30 is controlled to rotate by an independent drive mechanism. The worm gear 2 30 drives the worm wheel 2 31 to rotate. 1. The threaded sleeve 32 rotates, which in turn moves the threaded rod 33. The threaded rod 33 then rotates the rotating rod 34, which in turn moves the sliding shaft 36. The sliding cavity 35 guides the sliding of the sliding shaft 36. The sliding shaft 36 moves the guide block 37 via the fixed rod. The through opening 24 allows the guide block 37 to pass through. As the guide block 37 moves, it causes the guide block 38 to slide along the working cavity 23. The guide block 38 then moves the fixed rod 39. The fixed block 40 guides the movement of the fixed rod 39. The guide ball 53 extends from the working chamber 23 into the annular groove 2, making contact with the annular groove 2. This ensures that the mounting shaft 81 rotates smoothly along the annular groove 2. If the worm gear 21 shakes, it drives the connecting rod 28 to move. The connecting rod 28 drives the buffer block 27 to slide. Under the elastic action of the spring 26, the buffer block 27 has a buffering effect, thereby improving the stability of the rotation process of the worm gear 21. This ensures that the meshing between the worm gear 21 and the worm 20 remains stable. Because the worm gear 21 and the worm 20 have self-locking properties, the worm gear 21 is not affected by external factors. The rotation of the rotating rod 34 is stable due to the spring 26, which improves the cooperation between the guide ball 53 and the annular groove 2, and further improves the smoothness of the rotation of the guide ball 53 in the annular groove 2. The annular groove 2 limits the fixed rod 39, so that the mounting shaft 81 cannot be disengaged from the positioning hole. If the mounting shaft 81 is to be disassembled, the drive block 51 can be rotated in the opposite direction. The above-mentioned detachable mechanism can replace the bearing 54, so as to avoid the inconvenience of disassembling the mounting shaft 81 when it is installed through the bearing 54 and the positioning hole, which would make it inconvenient to adjust the position of the mounting shaft 81.

[0064] When installing the yarn bobbin 82, the through hole mates with the front of the mounting shaft 81. An independent drive mechanism controls the rotation of pulley 19. Pulley 19 drives worm gear 17 via rotating shaft 18. Worm gear 17 drives worm wheel 16, which in turn drives threaded sleeve 15. Threaded sleeve 15 moves threaded rod 14, which in turn moves rotating rod 13. Rotating rod 13 pushes the extrusion block 12, causing the extrusion blocks 12 on both sides to move towards each other, thus adjusting the curvature of the elastic strip 11. When the curvature of the elastic strip 11 changes, it contacts the through hole inside the cylinder 821. A rough block 111 is provided on the elastic strip 11. The rough block 111 contacts the through hole inside the cylinder 821, which increases the friction between the elastic strip 11 and the through hole, thereby improving the connection stability between the cylinder 821 and the mounting shaft 81. When disassembling the yarn bobbin 82, the drive block 51 can be rotated in the opposite direction. The installation and replacement of the yarn bobbin 82 can be completed simply by rotating the drive block 51. The operation is simple and convenient for replacing the yarn bobbin 82, which improves the replacement efficiency.

[0065] Example 4

[0066] Based on Example 3, such as Figure 10-12 As shown, the independent drive mechanism includes a drive block 51, which is fixedly connected to the fixed end of the telescopic rod 46. The fixed end of the telescopic rod 46 is rotatably connected to the upper end of the second working chamber 22. The movable end of the telescopic rod 46 enters the second working chamber 22 and engages with the connecting hole 50 on the rotating sleeve 48 and the groove 42 on the fixed sleeve 52. The left and right ends of the connecting hole 50 are symmetrically connected with slots 49, and the front and rear ends of the groove 42 are symmetrically provided with limiting blocks. The rotating sleeve 48 is fixedly connected to the second pulley 29, which is connected to the first pulley 19 via the conveyor belt 20. A connecting hole for the conveyor belt 20 to pass through is provided between the first working chamber 21 and the second working chamber 22. Sleeve 48 is rotatably connected to fixed sleeve 52, fixed sleeve 52 is rotatably connected to worm gear 30, worm gear 30 is rotatably set at the lower end of working chamber 22, electromagnetic block 43 is fixedly provided at the bottom end of groove 42, electromagnetic block 43 is correspondingly set with magnetic block 45, magnetic block 45 is fixedly connected to the lower end of telescopic rod 46, spring 44 is fixedly provided between telescopic rod 46 and groove 42, limiting grooves are symmetrically provided on the front and rear sides of telescopic rod 46, limiting grooves cooperate with limiting blocks, movable grooves are symmetrically provided on the left and right sides of telescopic rod 46, and locking block 47 is slidably provided in the movable groove, locking block 47 is fixedly provided between the movable groove and the locking block 47, and locking block 47 cooperates with locking groove 49.

[0067] The beneficial effects of the above technical solution are as follows:

[0068] When adjusting the position of the mounting shaft 81, in the initial state, the limiting groove of the telescopic rod 46 engages with the limiting block in the groove 42. Rotating the drive block 51 causes the telescopic rod 46 to rotate, which in turn causes the fixed sleeve 52 to rotate. The rotating sleeve 48 does not rotate due to the limiting effect of the pulley 29. The fixed sleeve 52 causes the worm gear 30 to rotate. When installing the yarn tube 82, energizing the electromagnetic block 43 causes it to repel the magnetic block 45, pushing the movable end of the telescopic rod 46 to retract. When the locking block 47 moves to the corresponding position in the locking slot 49, the elastic force of the spring three pushes the locking block 47 to engage with the locking slot 49. At this time, the spring four 44 is stretched, causing the drive block 51 to rotate. The drive block 51 drives the telescopic rod 46 to rotate, and the telescopic rod 46 drives the rotating sleeve 48 to rotate. Since the rotating sleeve 48 and the fixed sleeve 52 rotate, and the fixed sleeve 52 does not rotate under the limiting action of the worm gear two 30, the mechanism in the working chamber two 22 and the working chamber three 23 cannot rotate. The rotating sleeve 48 rotates. The second pulley 29 rotates, and the second pulley 29 drives the first pulley 19 to rotate via the conveyor belt 20. When the telescopic rod 46 is reconnected to the fixed sleeve 52, the electromagnetic block 43 is de-energized, and the electromagnetic block 43 and the magnetic block 45 no longer repel each other. Under the elastic action of the fourth spring 44, the movable end of the telescopic rod 46 extends, causing the locking block 47 to disengage from the locking groove 49, and the limiting block to re-engage with the limiting groove. Through the magnetic force between the electromagnetic block 43 and the magnetic block 45 and the elastic action of the fourth spring 44, the telescopic rod 46 can be switched freely. The connection state between the fixed sleeve 52 or the rotating sleeve 48 and the 6 allows the mechanisms between the working chamber 1 21, the working chamber 22 and the working chamber 3 23 to work independently. The installation of the mounting shaft 81 and the yarn frame 8, and the installation between the mounting shaft 81 and the yarn tube 82 are independent of each other. The working chamber 1 21 is correspondingly set in the through hole, and the mechanisms between the working chamber 22 and the working chamber 3 23 are separated. The working chamber 3 23 is correspondingly set in the positioning hole of the yarn frame 8. The working chamber 3 23 is correspondingly set on the outside, which facilitates the operation of the drive block 51.

[0069] Example 5

[0070] Based on Example 2, it also includes:

[0071] Bearing 54 is a ball bearing;

[0072] Speed ​​sensor: The speed sensor is installed on the mounting shaft 81 and is used to detect the speed of the mounting shaft 81;

[0073] Alarm: The alarm is installed on the yarn rack 8;

[0074] Controller: The controller connects to the speed sensor and alarm.

[0075] The controller operates the alarm based on the detection value of the speed sensor, including the following steps:

[0076] Step 1: The controller calculates the working stability coefficient of bearing 54 based on the rotational speed of the mounting shaft 81 detected by the speed sensor and formula (1). The controller compares the working stability coefficient of bearing 54 with the preset stability coefficient. If the calculated working stability coefficient of bearing 54 exceeds the range of the preset stability coefficient, the controller controls the alarm to sound.

[0077]

[0078] Wherein, K is the working stability coefficient of bearing 54, m is the number of balls in bearing 54, L is the diameter of the balls in bearing 54, C is the inner ring raceway diameter of bearing 54, R is the outer ring raceway diameter of bearing 54, cos is the cosine, α is the contact angle of bearing 54, N is the detection value of the speed sensor, and F is the preset frequency at which the balls in bearing 54 pass through the fixed point of the outer ring of bearing 54.

[0079] Wherein, the contact angle of bearing 54 is the angle between the ball load vector at the midpoint of the contact area between the ball and the raceway and the radial plane of the bearing. The actual frequency at which the balls in bearing 54 pass through the fixed point on the outer ring of bearing 54 is given. The operating stability coefficient of bearing 54 is the ratio of the actual frequency at which the balls in bearing 54 pass through the fixed point on the outer ring of bearing 54 to the preset frequency at which the balls in bearing 54 pass through the fixed point on the outer ring of bearing 54. If the actual frequency at which the balls in bearing 54 pass through the fixed point on the outer ring of bearing 54 deviates significantly from the preset frequency, it indicates that the raceway or balls of bearing 54 are damaged or deformed, resulting in poor operating stability of bearing 54. The controller will then activate the alarm.

[0080] The beneficial effects of the above technical solution are as follows:

[0081] A speed sensor is installed on the mounting shaft 81 to detect the speed of the mounting shaft 81. The controller calculates the working stability coefficient of the bearing 54 based on the speed of the mounting shaft 81 detected by the speed sensor and formula (1). The controller compares the working stability coefficient of the bearing 54 with the preset stability coefficient. If the calculated working stability coefficient of the bearing 54 exceeds the range of the preset stability coefficient, it indicates that the raceway or balls of the bearing 54 are damaged or deformed. The controller controls the alarm to sound an alarm, reminding the user to replace the bearing 54 in time to avoid affecting the stable operation of the mounting shaft 81.

[0082] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for applying fiber twisting in the braiding, winding, and pultrusion of pipes, characterized in that: Includes the following steps: Step 1: Pass the high-strength fiber yarn (10) through the yarn frame (8) in a high-low order. The yarn frame (8) is provided with a number of positioning holes in an array. A number of bearings (54) are installed in the positioning holes. The bearings (54) are rotatably connected to the mounting shaft (81). The mounting shaft (81) is connected to the yarn bobbin (82). The yarn bobbin (82) is a segmented yarn bobbin. The yarn bobbin (82) includes a number of bobbin bodies (821). The inside of the bobbin body (821) is provided with a through hole. The through hole is engaged with the mounting shaft (81). The mounting shaft (81) is equipped with a detachable mechanism. The detachable mechanism includes a working chamber one (21), a working chamber two (22), and a working chamber three (23) set inside the mounting shaft (81). The upper end of the working chamber one (21) is rotatably connected to the rotating shaft one (18). Rotating shaft 1 (18) is fixedly connected to pulley 1 (19) and worm 1 (17). Worm 1 (17) is rotatably connected to the lower end of working chamber 1 (21). Worm wheel 1 (16) is meshed on the left and right sides of worm 1 (17). Worm wheel 1 (16) is threadedly connected to threaded sleeve 1 (15). Threaded sleeve 1 (15) is threadedly connected to the threaded section of threaded rod 1 (14). The cylindrical end of threaded rod 1 (14) is rotatably connected to rotating rod 1 (13). The end of rotating rod 1 (13) away from threaded rod 1 (14) is rotatably connected to extrusion block (12). The side end of extrusion block (12) that passes through working chamber 1 (21) is fixedly connected to the middle part of elastic strip (11). The front and rear ends of elastic strip (11) are slidably connected to mounting shaft (81). The front end of the working chamber 2 (22) is connected to the left and right sides of the buffer groove (25). The buffer block (27) is slidably provided in the buffer groove (25), and the buffer block (27) and the buffer groove (25) are fixedly provided with the spring 2 (26). The end of the buffer block (27) away from the spring 2 (26) is rotatably connected to the connecting rod (28). The connecting rod (28) is fixedly connected to the worm gear 2 (31). The worm gear 2 (31) meshes with the worm 2 (30), and the worm gear 2 (31) is fixedly connected to the threaded sleeve 2 (32). The threaded sleeve 2 (32) is threadedly connected to the threaded section of the threaded rod 2 (33), the cylindrical section of the threaded rod 2 (33) is slidably connected to the rotating rod 2 (34), the middle part of the rotating rod 2 (34) is rotatably connected to the support rod (41), the support rod (41) is fixedly set at the rear end of the working cavity 2 (22), the rotating rod 2 (34) is provided with a sliding cavity (35) on the side away from the threaded rod 2 (33), the sliding cavity (35) is slidably connected to the sliding shaft (36), and the sliding shaft (36) is rotatably connected to the mounting rod; Working chamber three (23) is connected to the through port (24). The through port (24) is connected to the left and right sides of the rear end of working chamber two (22). The mounting rod passes through the through port (24) and is fixedly connected to guide block one (37). Guide block one (37) is slidably connected to guide block two (38). Guide block two (38) is slidably set in working chamber three (23). The end of guide block two (38) away from guide block one (37) is fixedly connected to the fixing rod (39). The fixing rod (39) is slidably connected to the fixing block (40) in working chamber three (23). The fixing rod (39) passes through the side end of working chamber three (23) and is connected to the outside. The end of fixing rod (39) away from guide block two (38) is rotatably connected to guide ball (53). Guide ball (53) contacts annular groove two. Annular groove two is set in the positioning hole on the yarn frame (8). Pulley one (19) and worm gear two (30) are both driven by independent drive mechanisms. The independent drive mechanism includes a drive block (51), which is fixedly connected to the fixed end of the telescopic rod (46). The fixed end of the telescopic rod (46) is rotatably connected to the upper end of the second working chamber (22). The movable end of the telescopic rod (46) enters the second working chamber (22) and engages with the connecting hole (50) on the rotating sleeve (48) and the groove (42) on the fixed sleeve (52). The left and right ends of the connecting hole (50) are symmetrically connected with slots (49). The front and rear ends of the groove (42) are symmetrically provided with limiting blocks. The rotating sleeve (48) is fixedly connected to the second pulley (29). The second pulley (29) is connected to the first pulley (19) through the conveyor belt (20). A connecting hole for the conveyor belt (20) to pass through is provided between the first working chamber (21) and the second working chamber (22). The sleeve (48) is rotatably connected to the fixed sleeve (52), the fixed sleeve (52) is rotatably connected to the worm gear two (30), the worm gear two (30) is rotatably set at the lower end of the working cavity two (22), the bottom end of the groove (42) is fixedly provided with an electromagnetic block (43), the electromagnetic block (43) and the magnetic block (45) are correspondingly set, the magnetic block (45) is fixedly connected to the lower end of the telescopic rod (46), the telescopic rod (46) and the groove (42) are fixedly provided with a spring four (44), the front and rear sides of the telescopic rod (46) are symmetrically provided with limiting grooves, the limiting grooves cooperate with the limiting blocks, the left and right sides of the telescopic rod (46) are symmetrically provided with movable grooves, and the movable grooves are slidably provided with a locking block (47), the locking block (47) and the movable groove are fixedly provided with a spring three, and the locking block (47) cooperates with the locking groove (49); Step 2: Using a ring twisting machine, the untwisted fiber bundle (100) is twisted into a twisted fiber bundle (200) through a braided yarn tube; Step 3: The winding machine (6) winds a circular fiber bundle to form a winding layer on the surface of the mandrel (7); Step 4: Load the twisted fiber yarn tubes onto each spindle of the braiding machine (5) for braiding, forming a braided layer on the surface of the winding layer; Step 5: Then, thermosetting unsaturated resin is injected through the heated mold (4), and the product (2) is cured and molded by setting the temperature of different areas through the mold heating system. Step 6: Pull the product (2) out of the mold using the traction machine (1).

2. The method for applying fiber twisting in braided, wound, and pultruded pipes according to claim 1, characterized in that: The high-strength fiber in step 1 is a high-performance fiber. The untwisted fiber bundle (100) in step 2 is a flat single-strand 1200tex fiber bundle, and the twisted fiber bundle (200) is a round single-strand 1200tex fiber bundle with a twist of 28 twists / m and a twist direction of Z twist.

3. The method for applying fiber twisting in braided, wound, and pultruded pipes according to claim 1, characterized in that: The traction machine (1), heating mold (4), braiding machine (5), winding machine (6), and yarn frame (8) are arranged in sequence according to the traction direction of the traction machine (1). The heating mold (4) is installed on the mold lifting platform (3). The core mold (7) is connected to the core mold clamping device (9). The core mold (7) is set in correspondence with the heating mold (4), braiding machine (5), and winding machine (6).

4. The method for applying fiber twisting in braided, wound, and pultruded pipes according to claim 1, characterized in that: Two adjacent cylinders (821) are connected by a convenient connection mechanism. The convenient connection mechanism includes an annular groove 1 symmetrically arranged at the front and rear ends of the cylinder (821), and a fixing ring 1 (83) is fixedly installed at one end of the cylinder (821). A magnetic ring 1 (812) is installed in the annular groove 1 near the fixing ring 1 (83). An opening 1 (84) through the fixing ring 1 (83) communicates with a through hole. An installation groove (810) is provided at the end of the cylinder (821) away from the fixing ring 1 (83). The installation groove (810) cooperates with the fixing ring 1 (83) of the adjacent cylinder (821). A magnetic ring 2 (813) is installed in the annular groove 1 near the installation groove (810). The magnetic ring 1 (812) and the magnetic ring 2 (813) attract each other. A fixing ring 2 (87) is fixedly installed in the installation groove (810). An opening 2 (88) through the fixing ring 2 (87) communicates with a through hole.

5. The method for applying fiber twisting in braided, wound, and pultruded pipes according to claim 4, characterized in that: The fixed ring 1 (83) is provided with a number of arc-shaped grooves (85) in a circumferential array at the end away from the cylinder (821). The arc-shaped grooves (85) are slidably connected to the connecting block 1 (86). The connecting block 1 (86) is fixedly connected to the connecting block 2 (818). The fixed ring 2 (87) is provided with a number of guide grooves (89) in a circumferential array at the end away from the through hole. The guide grooves (89) cooperate with the connecting block 1 (86) and the connecting block 2 (818). The guide grooves (89) are connected to the mating groove (811). The mating groove (811) is provided with a sliding block (819). The sliding block (819) is fixedly connected to the spring 1 (820). The spring 1 (820) is in contact with the connecting block 2 (818).

6. The method for applying fiber twisting in braided, wound, and pultruded pipes according to claim 5, characterized in that: The convenient connection mechanism also includes a fixing ring (814). The inner ring of the fixing ring (814) is fixedly connected to the outside of the side of the cylinder (821) near the magnetic ring (812). The fixing ring (814) is evenly provided with a number of fixing holes (815) in the circumference. The number of fixing holes (815) are respectively engaged with the fixing rod (816). The fixing rod (816) is fixedly connected with the first mating block (817). The first mating block (817) is slidably disposed on the outside of the side of the cylinder (821) near the magnetic ring (813). The first mating block (817) is slidably connected with the second mating block (822). The second mating block (822) penetrates the side end of the cylinder (821) and enters the mating groove (811). The second mating block (822) is fixedly connected with the sliding block (819). The mating groove (811) is connected to the left and right sides of the mounting groove (810).

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