Carbon fiber precursor high-pressure steam drawing machine based on draft multiple control

Abstract

The invention discloses a carbon fiber precursor high-pressure steam drawing machine based on draft multiple control, and relates to the technical field of carbon fiber processing. The device comprises a drafting machine, three groups of drafting tanks are fixedly mounted on one side of the drafting machine, and drafting mechanisms are arranged in the three groups of drafting tanks. After a sealing plate is separated from the surface of a drafting tank through an electric telescopic rod, a precursor is fixed to a reserved hole, pressure at one end of a driving rod is increased through an air cylinder, the driving rod drives a second sliding block to horizontally move, and therefore the precursor is fixed through the second sliding block; due to the arrangement of the mechanism, the problem that the draft ratio cannot be adjusted when the carbon fiber precursors are drafted is effectively solved, the effect of meeting different processing requirements can be achieved, the adaptability of the drafting machine is improved, the debugging difficulty is reduced, the tension is stable during drafting, and the drafting efficiency is improved. And the protofilament is prevented from being broken.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber processing technology, specifically to a high-pressure steam drawing machine for carbon fiber precursors based on draw ratio control. Background Technology

[0002] The high-pressure steam drawing machine for carbon fiber precursor is one of the key pieces of equipment in the carbon fiber production process. Its main function is to draw carbon fiber precursor through high-temperature and high-pressure steam to improve the strength and modulus of the fiber. The control of the draw ratio is an important part of the technical design of this equipment, which directly affects the mechanical properties and microstructure uniformity of the final product. During the drawing process, an appropriate draw ratio can promote the orientation and alignment of polymer chains, thereby improving the overall performance of carbon fiber. However, too high or too low a draw ratio will lead to fiber defects, such as fiber breakage and uneven strength. Carbon fiber is an inorganic polymer fiber with a carbon content of more than 90%. In addition to the general properties of carbon materials such as high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance, it also has the characteristics of being soft and easy to process, lightweight, and having high specific strength and specific modulus. It is a new generation of reinforcing material and is widely used in sports equipment, textiles, chemical machinery, medicine, military and many cutting-edge technology fields.

[0003] A Chinese patent (publication number: CN105970358B) discloses a high-pressure steam drawing machine for carbon fiber precursor. The device has a low-pressure steam inlet pipe at the bottom of the drawing tank, above which is a perforated distribution plate. Labyrinth seal boxes are located at the inlet and outlet ends of the drawing tank, with an upper and lower labyrinth seal structure inside. A gap exists between the upper and lower labyrinth seal structures, forming a fiber bundle running channel. This high-pressure steam drawing machine for carbon fiber precursor has a high drawing ratio, few fiber breaks, high fiber bundle throughput, and good pressure holding performance, effectively improving the orientation and crystallinity of the precursor. It is a key piece of equipment for producing high-performance carbon fiber precursor. However, in actual use, this high-pressure steam drawing machine cannot effectively adjust the drawing ratio, leading to problems such as insufficient raw material strength and excessive drawing ratio causing breakage. It cannot meet the drawing requirements of different precursors, reducing the functionality of the device and failing to guarantee stable pressure during drawing. Summary of the Invention

[0004] The purpose of this invention is to solve the above problems by providing a high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0006] A high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control includes a drawing machine. Three sets of drawing tanks are fixedly installed on one side of the drawing machine. Each of the three sets of drawing tanks contains a drawing mechanism. Each drawing mechanism includes a drawing plate, a limiting block, a sliding rod, a pad, a servo motor, a spring, an adjusting rod, an adjusting wheel, a servo motor, and a sealing plate. The sealing plate is fitted to the drawing tank and fixedly connected to the servo motor. The output shaft of the servo motor is fixedly connected to the drawing plate. One end of the spring is fixedly connected to the stretching plate, and the other end of the spring is fixedly connected to the pad. The pad is slidably connected to the stretching plate, the pad is fixedly connected to the sliding rod, the sliding rod is fixedly connected to the limit block, the sliding rod is fixedly connected to the adjusting rod one, the sliding rod is fixedly connected to the adjusting rod two, a servo motor two is fixedly installed inside the stretching plate, the output shaft of the servo motor two is fixedly connected to the adjusting base, the adjusting base is fixedly connected to the adjusting wheel, the adjusting wheel is in contact with the adjusting rod one, and the adjusting wheel is in contact with the adjusting rod two.

[0007] Furthermore, the surface of the adjusting rod 2 has multiple sets of reserved holes, and a drive rod is slidably connected inside the adjusting rod 2. Multiple sets of sliders 2 are fixedly connected to one side of the drive rod, and a locking block is fixedly connected to one side of each set of sliders 2. A spring 2 is fixedly connected to the other side of the slider 2. The spring 2 is fixedly connected to the adjusting rod 2. A cylinder is fixedly installed on one side of the stretching plate, and the cylinder is connected to the drive rod.

[0008] Furthermore, a fixing block is fixedly connected to one side of the drawing machine, a driving block is attached to the upper surface of the fixing block, a connecting block is fixedly connected to the lower surface of the driving block, a receiving block is fixedly connected to one side of the connecting block, and the receiving block is fixedly connected to the sealing plate.

[0009] Furthermore, a baffle is fixedly connected to the upper surface of the fixed block, an electric telescopic rod is fixedly installed on one side of the baffle, the output end of the electric telescopic rod is fixedly connected to the drive block, and a slider is fixedly connected to the lower surface of the drive block, the slider being slidably connected to the fixed block.

[0010] Furthermore, a constant pressure tube is fixedly connected to one end of the drawing tank, an exhaust port is fixedly installed on the surface of the constant pressure tube, and a knob is rotatably connected to one side of the constant pressure tube, the knob being fixedly connected to a screw.

[0011] Furthermore, the constant pressure tube is internally equipped with a pressure regulating mechanism, which includes a sealing plug, a third spring, a third slider, and a screw. One end of the third spring is fixedly connected to the sealing plug, the other end of the third spring is fixedly connected to the third slider, and the third slider is threadedly connected to the screw.

[0012] Furthermore, a fixed plate is fixedly connected to one side of the drawing machine, and a high-pressure steam engine is attached to the upper surface of the fixed plate. The high-pressure steam engine is fixedly connected to the drawing machine and is connected to the drawing tank.

[0013] Furthermore, two sets of protective plates are attached to the upper surface of the fixing plate, and both sets of protective plates are attached to the high-pressure steam engine.

[0014] Furthermore, two sets of bolts are inserted inside the protective plate, and both sets of bolts are threadedly connected to the fixing plate.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. When adjusting the draw ratio, the present invention involves using an electric telescopic rod to detach the sealing plate from the surface of the draw tank, then fixing the primary wire to the pre-drilled hole. A cylinder increases the pressure at one end of the drive rod, causing the drive rod to move the second slider horizontally, thus fixing the primary wire. After the electric telescopic rod returns the sealing plate to its original position, the other end of the primary wire is fixed inside the draw tank. Based on the draw ratio, a servo motor drives the adjusting base and adjusting wheel to rotate slowly, causing the adjusting rods one and two, which are in contact with the adjusting wheel, to slide outwards. This, in turn, causes the sliding rod, the limiting block, and the pad to move outwards. The movement compresses spring one, and the elastic force of spring one and the supporting force of the adjusting wheel stabilize adjusting rod two and adjusting rod one. High-pressure steam is applied to the inside of the drawing tank by a high-pressure steam engine, which softens the raw filament. Servo motor one drives the drawing plate, adjusting rod two and adjusting rod one to rotate, thereby causing the raw filament to be wound and drawn. The design of this mechanism effectively avoids the problem of not being able to adjust the drawing ratio when drawing carbon fiber raw filament, and can meet the effect of different processing requirements. At the same time, it improves the adaptability of the drawing machine, reduces the difficulty of debugging, and also makes the tension stable during drawing, preventing the raw filament from breaking.

[0017] 2. This invention rotates the screw by turning the knob, causing the threaded slider three on the screw surface to move horizontally. This compresses the spring three, increasing the elastic force between the spring three and the sealing plug. When the internal pressure of the drawing tank exceeds the elastic force between the spring three and the sealing plug, the sealing plug moves horizontally, allowing the gas inside the drawing tank to be discharged to the outside of the device through the exhaust port. This regulates the internal pressure of the drawing tank. This mechanism effectively avoids the problem of unstable internal pressure in the drawing tank, achieving the effect of controlling the internal pressure of the drawing tank. At the same time, it improves the stability of the raw yarn, prevents the raw yarn from breaking, and increases the yield of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is the present invention. Figure 1 Rearview overall structure diagram;

[0020] Figure 3 This is the present invention. Figure 1 Top view of a partial structural diagram;

[0021] Figure 4 This is the present invention. Figure 3 Schematic diagram of the rear view section;

[0022] Figure 5 This is the present invention. Figure 4 Rear view internal structure diagram;

[0023] Figure 6 This is the present invention. Figure 5 Schematic diagram of the rear view section;

[0024] Figure 7 This is the present invention. Figure 6 Left view of the internal structure diagram.

[0025] Reference numerals: 1. Drawing machine; 11. Fixing plate; 12. High-pressure steam engine; 13. Protective plate; 14. Bolt; 2. Fixing block; 21. Slider one; 22. Drive block; 23. Electric telescopic rod; 24. Baffle; 25. Sealing plate; 26. Receiving block; 27. Connecting block; 3. Drawing mechanism; 31. Drawing tank; 32. Adjusting rod one; 33. Adjusting rod two; 34. Reserved hole; 35. Spring one; 36. Servo motor one 37. Pad; 38. Sliding rod; 39. Limiting block; 310. Cylinder; 311. Stretch plate; 312. Adjusting wheel; 313. Servo motor II; 314. Adjusting base; 315. Drive rod; 316. Locking block; 317. Spring II; 318. Slider II; 4. Pressure regulating mechanism; 41. Knob; 42. Screw; 43. Exhaust port; 44. Slider III; 45. Spring III; 46. Sealing plug; 47. Constant pressure tube. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] Example 1, as Figures 1-7As shown, a high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control includes a drawing machine 1. Three sets of drawing tanks 31 are fixedly installed on one side of the drawing machine 1. Each of the three sets of drawing tanks 31 is equipped with a drawing mechanism 3. The drawing mechanism 3 includes a drawing plate 311, a limiting block 39, a sliding rod 38, a pad 37, a servo motor 36, a spring 35, an adjusting rod 33, an adjusting rod 32, an adjusting wheel 312, a servo motor 313, and a sealing plate 25. The sealing plate 25 is in contact with the drawing tank 31 and is fixedly connected to the servo motor 36. The output shaft of the servo motor 36 is fixedly connected to the drawing plate 311. One end of spring 5 is fixedly connected to the stretching plate 311, and the other end of spring 35 is fixedly connected to the pad 37. The pad 37 is slidably connected to the stretching plate 311. The pad 37 is fixedly connected to the sliding rod 38. The sliding rod 38 is fixedly connected to the limiting block 39. The sliding rod 38 is fixedly connected to the adjusting rod 32. The sliding rod 38 is fixedly connected to the adjusting rod 33. The servo motor 313 is fixedly installed inside the stretching plate 311. The output shaft of the servo motor 313 is fixedly connected to the adjusting base 314. The adjusting base 314 is fixedly connected to the adjusting wheel 312. The adjusting wheel 312 is in contact with the adjusting rod 32. The adjusting wheel 312 is in contact with the adjusting rod 33.

[0028] The high-pressure steam drawing machine for carbon fiber precursor is one of the key pieces of equipment in the carbon fiber production process. Its main function is to draw carbon fiber precursor through high-temperature and high-pressure steam to improve the strength and modulus of the fiber. The draw ratio control is a crucial component of the equipment's technical design, directly affecting the mechanical properties and microstructure uniformity of the final product. During the drawing process, based on the draw ratio, the servo motor 313 drives the adjusting base 314 and the adjusting wheel 312 to rotate slowly, ensuring that the base is in contact with the adjusting wheel 312. Adjusting rod 32 and adjusting rod 33 slide outward, thereby driving sliding rod 38, limiting block 39 and pad 37 to move outward, causing spring 35 to compress. The elastic force of spring 35 and the supporting force of adjusting wheel 312 stabilize adjusting rod 33 and adjusting rod 32. High-pressure steam is applied to the inside of drawing tank 31 by high-pressure steam engine 12, which softens the raw yarn. Servo motor 36 drives drawing plate 311, adjusting rod 33 and adjusting rod 32 to rotate, thereby causing the raw yarn to be wound and drawn.

[0029] Example 2, as Figure 6 , Figure 7As shown, based on the above embodiment, it further includes: multiple sets of reserved holes 34 are opened on the surface of the adjusting rod 33; a driving rod 315 is slidably connected inside the adjusting rod 33; multiple sets of sliders 318 are fixedly connected to one side of the driving rod 315; a locking block 316 is fixedly connected to one side of each set of sliders 318; a spring 317 is fixedly connected to the other side of the sliders 318; the spring 317 is fixedly connected to the adjusting rod 33; and a cylinder 310 is fixedly installed on one side of the stretching plate 311. When the primary wire is fixed by connecting to the drive rod 315, the sealing plate 25 is removed from the surface of the drawing tank 31 by the electric telescopic rod 23, and the primary wire is fixed to the reserved hole 34. The pressure at one end of the drive rod 315 is increased by the cylinder 310, so that the drive rod 315 drives the slider 318 to move horizontally, thereby fixing the primary wire by the slider 318. After the sealing plate 25 is restored to its original position by the electric telescopic rod 23, the other end of the primary wire is fixed inside the drawing tank 31, thus completing the fixing of the primary wire.

[0030] Example 3, as Figure 3 As shown, based on the above embodiment, it further includes: a fixed block 2 fixedly connected to one side of the drawing machine 1; a driving block 22 attached to the upper surface of the fixed block 2; a connecting block 27 fixedly connected to the lower surface of the driving block 22; a receiving block 26 fixedly connected to one side of the connecting block 27; the receiving block 26 fixedly connected to the sealing plate 25; a baffle 24 fixedly connected to the upper surface of the fixed block 2; an electric telescopic rod 23 fixedly installed on one side of the baffle 24; and the output end of the electric telescopic rod 23 fixedly connected to the driving block 22. The lower surface of 2 is fixedly connected to a slider 21, which is slidably connected to the fixed block 2. When the position of the sealing plate 25 is adjusted, the electric telescopic rod 23 drives the drive block 22 and the slider 21 to move horizontally. The slider 21 makes the movement more stable, thereby driving the connecting block 27, the receiving block 26 and the sealing plate 25 to move horizontally through the drive block 22, so as to fix and remove the raw wire. At the same time, the component controls the opening and closing of three sets of drawing tanks 31 to prevent the drawing tanks 31 from not being filled with material.

[0031] Example 4, as Figure 3 , Figure 4As shown, based on the above embodiment, it further includes a constant pressure tube 47 fixedly connected to one end of the stretching tank 31, an exhaust port 43 fixedly installed on the surface of the constant pressure tube 47, a knob 41 rotatably connected to one side of the constant pressure tube 47, the knob 41 being fixedly connected to the screw 42, and a pressure regulating mechanism 4 provided inside the constant pressure tube 47. The pressure regulating mechanism 4 includes a sealing plug 46, a spring 45, a slider 44, and a screw 42. One end of the spring 45 is fixedly connected to the sealing plug 46, and the other end of the spring 45 is fixedly connected to the slider 44. The slider 44 is connected to the screw. 42 threaded connection. When adjusting the internal pressure of the drawing tank 31, the screw 42 is rotated by turning the knob 41, causing the slider 44 connected to the threaded surface of the screw 42 to move horizontally, which compresses the spring 45, thereby increasing the elastic force between the spring 45 and the sealing plug 46. When the internal pressure of the drawing tank 31 is greater than the elastic force between the spring 45 and the sealing plug 46, the sealing plug 46 moves horizontally, allowing the gas inside the drawing tank 31 to be discharged to the outside of the device through the exhaust port 43, thereby regulating the internal pressure of the drawing tank 31.

[0032] Example 5, as Figure 2 As shown, based on the above embodiment, it further includes a fixed plate 11 fixedly connected to one side of the drawing machine 1, a high-pressure steam generator 12 attached to the upper surface of the fixed plate 11, the high-pressure steam generator 12 fixedly connected to the drawing machine 1, the high-pressure steam generator 12 communicating with the drawing tank 31, two sets of protective plates 13 attached to the upper surface of the fixed plate 11, both sets of protective plates 13 attached to the high-pressure steam generator 12, two sets of bolts 14 inserted inside the protective plates 13, both sets of bolts 14 threadedly connected to the fixed plate 11, the high-pressure steam generator 12 provides high-pressure steam to the inside of the drawing tank 31, thereby fully softening the raw yarn and preventing breakage during subsequent drawing.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control, comprising a drawing machine (1), characterized in that, Three sets of drawing tanks (31) are fixedly installed on one side of the drawing machine (1). Each of the three sets of drawing tanks (31) is equipped with a drawing mechanism (3). The drawing mechanism (3) includes a drawing plate (311), a limiting block (39), a sliding rod (38), a pad (37), a servo motor (36), a spring (35), an adjusting rod (33), an adjusting rod (32), an adjusting wheel (312), a servo motor (313), and a sealing plate (25). The sealing plate (25) is in contact with the drawing tank (31). The sealing plate (25) is fixedly connected to the servo motor (36). The output shaft of the servo motor (36) is fixedly connected to the drawing plate (311). One end of the spring (35) is fixedly connected to the drawing plate (311). The other end of spring 1 (35) is fixedly connected to pad block (37), pad block (37) is slidably connected to stretching plate (311), pad block (37) is fixedly connected to sliding rod (38), sliding rod (38) is fixedly connected to limit block (39), sliding rod (38) is fixedly connected to adjusting rod 1 (32), sliding rod (38) is fixedly connected to adjusting rod 2 (33), servo motor 2 (313) is fixedly installed inside stretching plate (311), the output shaft of servo motor 2 (313) is fixedly connected to adjusting base (314), adjusting base (314) is fixedly connected to adjusting wheel (312), adjusting wheel (312) is in contact with adjusting rod 1 (32), adjusting wheel (312) is in contact with adjusting rod 2 (33).

2. The high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 1, characterized in that, The surface of the second adjusting rod (33) has multiple sets of reserved holes (34). The inside of the second adjusting rod (33) is slidably connected to a drive rod (315). One side of the drive rod (315) is fixedly connected to multiple sets of sliders (318). One side of each set of sliders (318) is fixedly connected to a locking block (316). The other side of the sliders (318) is fixedly connected to a spring (317). The spring (317) is fixedly connected to the second adjusting rod (33). One side of the stretching plate (311) is fixedly installed with a cylinder (310). The cylinder (310) is connected to the drive rod (315).

3. The high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 1, characterized in that, A fixed block (2) is fixedly connected to one side of the stretching machine (1). A driving block (22) is attached to the upper surface of the fixed block (2). A connecting block (27) is fixedly connected to the lower surface of the driving block (22). A receiving block (26) is fixedly connected to one side of the connecting block (27). The receiving block (26) is fixedly connected to the sealing plate (25).

4. The high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 3, characterized in that, A baffle (24) is fixedly connected to the upper surface of the fixed block (2). An electric telescopic rod (23) is fixedly installed on one side of the baffle (24). The output end of the electric telescopic rod (23) is fixedly connected to the drive block (22). A slider (21) is fixedly connected to the lower surface of the drive block (22). The slider (21) is slidably connected to the fixed block (2).

5. The high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 1, characterized in that, One end of the stretching tank (31) is fixedly connected to a constant pressure tube (47), and an exhaust port (43) is fixedly installed on the surface of the constant pressure tube (47). A knob (41) is rotatably connected to one side of the constant pressure tube (47), and the knob (41) is fixedly connected to the screw (42).

6. A high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 5, characterized in that, The constant pressure tube (47) is equipped with a pressure regulating mechanism (4). The pressure regulating mechanism (4) includes a sealing plug (46), a spring (45), a slider (44), and a screw (42). One end of the spring (45) is fixedly connected to the sealing plug (46), and the other end of the spring (45) is fixedly connected to the slider (44). The slider (44) is threadedly connected to the screw (42).

7. A high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 1, characterized in that, A fixed plate (11) is fixedly connected to one side of the drawing machine (1), and a high-pressure steam engine (12) is attached to the upper surface of the fixed plate (11). The high-pressure steam engine (12) is fixedly connected to the drawing machine (1) and is connected to the drawing tank (31).

8. A high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 7, characterized in that, The upper surface of the fixing plate (11) is fitted with two sets of guard plates (13), both sets of guard plates (13) being fitted with the high-pressure steam engine (12).

9. A high-pressure steam drawing machine for carbon fiber precursor based on draw ratio control according to claim 8, characterized in that, The guard plate (13) has two sets of bolts (14) inserted inside, and both sets of bolts (14) are threadedly connected to the fixing plate (11).

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