Device and method for the transport of polyacrylonitrile dry-jet wet-spun filaments for the production of solidified forms

Abstract

The application discloses a polyacrylonitrile dry-jet wet spinning original filament coagulation forming production conveying device and method, and particularly relates to the polyacrylonitrile production technical field, and comprises a coagulation bath tank, a guide roller is rotatably installed at one side of the top of the coagulation bath tank; a first conveying mechanism is installed at the bottom of the coagulation bath tank and at one side of the guide roller, and the original filament bundle is limited in the coagulation bath tank through the first conveying mechanism to complete coagulation. The original filament bundle is actively rotated and guided and limited in the coagulation bath tank through the first conveying mechanism, the original filament bundle can be fully contacted with the coagulation liquid in the coagulation bath tank to complete the coagulation operation, power is transmitted to the second conveying mechanism through the linkage mechanism, the first conveying mechanism and the second conveying mechanism form an original filament bundle conveying system, the reciprocating pulling of the coagulated original filament bundle is completed through the second conveying mechanism, and the continuous reciprocating outward pulling of the original filament bundle is completed to complete conveying.

Description

Technical Field

[0001] This invention relates to the field of polyacrylonitrile production technology, specifically to a conveying device and method for solidifying and forming polyacrylonitrile dry-jet wet-spinning precursor fibers. Background Technology

[0002] Dry-jet wet spinning refers to a solution spinning method that combines the characteristics of dry-jet and wet spinning. The nozzle has a high stretch ratio, and when it enters the wet coagulation bath, it can improve the filament swelling phenomenon during wet spinning. Therefore, the structure is more compact, the spinning speed is higher, the nascent filament has a certain strength, and high-performance fibers can be obtained after post-treatment.

[0003] The advantages of polyacrylonitrile fiber are good weather resistance and sun resistance. It is also resistant to chemical reagents, especially inorganic acids, bleaching powder, hydrogen peroxide and general organic reagents. In the industrial production of polyacrylonitrile precursor, dry-jet wet spinning is required for production and processing. The precursor is spun out through the spinneret assembly and sent into the coagulation bath to contact the coagulation liquid to complete the coagulation treatment of the spun precursor, ensuring the quality of the precursor. Then, the precursor is guided and rectified into precursor filament bundles by the rectifier, and then the precursor filament bundles are transported in subsequent processes.

[0004] Currently, in the field of fiber production, conveying devices are frequently used to complete the conveying work. For example, CN113277316A discloses a glass fiber yarn circulating impregnation system. The conveying steel belt of this impregnation system is wound sequentially around the driving wheel, the driven wheel and the conical guide roller. The rotation of the conveying steel belt is achieved by the driving wheel. The drive motor, the conveying wheel, the conveying steel belt and other components form a conveying system. The glass fiber is continuously fed into and out of the impregnation tank for processing by the conveying system.

[0005] Currently, in the production of polyacrylonitrile, when the raw filaments are solidified in the coagulation bath, a conveying system is also needed to guide and transport the raw filament bundles. However, most of the conveying devices used in the coagulation bath currently involve setting guide rollers inside the coagulation bath and using an external power unit to directly pull and transport the raw filament bundles. Since the external power unit is located far from the coagulation bath, the tension it exerts on the raw filament bundles is unstable. Therefore, directly pulling the raw filament bundles can easily lead to problems such as excessive tension causing deformation of the raw filament bundles due to the long travel distance in the coagulation bath. This is not conducive to the stable transport of the raw filament bundles and affects their quality. Summary of the Invention

[0006] The purpose of this invention is to provide a conveying device and method for the solidification and molding of polyacrylonitrile dry-jet wet-spinning precursor fibers, so as to solve the above-mentioned technical problems.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a conveying device for the solidification and forming of polyacrylonitrile dry-jet wet spinning precursor yarn. It includes a solidification bath, a guide roller rotatably mounted on one side of the top of the solidification bath, and a first conveying mechanism mounted on the bottom of the solidification bath, located on one side of the guide roller. The first conveying mechanism confines the precursor yarn bundle within the solidification bath to complete solidification. This first conveying mechanism is used to guide and restrict the rotation of the solidified precursor yarn bundle. A second conveying mechanism is mounted on the top of the solidification bath, away from the guide roller. This second conveying mechanism is used to perform reciprocating pulling and conveying actions on the precursor yarn bundle. A linkage mechanism is mounted on one side of the bottom of the solidification bath. This linkage mechanism enables the power linkage between the first and second conveying mechanisms. The linkage mechanism combines the first and second conveying mechanisms into a precursor yarn bundle conveying system, which conveys the precursor yarn bundle within the solidification bath.

[0009] Furthermore, the first conveying mechanism includes four rectangular adjustment seats distributed at the bottom of the coagulation bath, and two conveying rollers are rotatably mounted parallel to each other at the bottom of the coagulation bath. The two ends of the two conveying rollers are rotatably connected to two parallel adjustment seats respectively. One end of each conveying roller is respectively sealed and rotatably disposed through the adjustment seat and the coagulation bath. A sprocket is fixedly sleeved at the end of each conveying roller that extends out of the coagulation bath. A conveying chain is driven between the two sprockets. A motor is mounted on one side of the outer wall of the coagulation bath through a bracket. The output end of the motor is drivenly connected to one of the conveying rollers.

[0010] Furthermore, each of the four adjusting seats has an adjusting area through which a slider is slidably installed. An adjusting screw is threaded through the top of the adjusting seat, and the bottom of the adjusting screw is rotatably connected to the upper surface of the slider. Pressure rollers are installed above the two conveying rollers, and the two ends of the pressure rollers are rotatably connected to the corresponding sliders.

[0011] Furthermore, the linkage mechanism includes a first gear detachably and rotatably mounted on one side of the bottom of the coagulation bath, a second gear fixedly sleeved on one end of one of the conveying rollers, a drive shaft rotatably mounted on one side of the bottom of the coagulation bath, and a third gear fixedly sleeved on one end of the drive shaft, with the first gear meshing with the second and third gears. A cut-off area is provided in the middle of the drive shaft, and two drive plates connected to the drive shaft are provided on both sides of the cut-off area. A linkage shaft is provided between the two drive plates, offset from the axis of the drive shaft. Two rings are symmetrically rotatably sleeved on the linkage shaft, and rocker arms are fixedly mounted on both rings.

[0012] Furthermore, the second conveying mechanism includes a fixed frame installed on one side of the top of the coagulation bath, a conveying sleeve detachably provided on the fixed frame, a traction sleeve slidably restricted at the bottom inside the conveying sleeve, a blocking ring fixedly fitted at the bottom outside the traction sleeve, and fixed plates symmetrically installed at both ends of the blocking ring, with the two fixed plates respectively connected to the linkage mechanism, and three pressing units arranged in a circular array inside the traction sleeve, and an air supply unit installed at the bottom of the traction sleeve, which is connected to the three pressing units.

[0013] Furthermore, the air supply unit includes an annular cavity installed at the bottom of the traction sleeve, and a No. 1 sleeve is fixedly inserted through both fixed plates. A No. 1 piston rod is slidably installed in the No. 1 sleeve, and the top of the No. 1 piston rod is connected to the side wall of the conveying sleeve. A No. 1 pipe is connected and installed on one side of the bottom of the No. 1 sleeve, and a No. 2 pipe is connected and installed on the other side of the bottom of the No. 1 sleeve. A pressure relief pipe is connected and installed at the bottom of the No. 1 sleeve, and the No. 2 pipe is connected to the annular cavity through a pipeline.

[0014] Furthermore, each of the three pressing units includes a main conveying pipe, which is installed inside the traction sleeve via a bracket. Two branch pipes are symmetrically arranged on the main conveying pipe. Two second sleeves are arranged on one side of the two branch pipes on the inner wall of the traction sleeve, and the two branch pipes are respectively connected to the bottom of the two second sleeves. Gas is introduced into the second sleeve through the branch pipes to push out the second piston rod. The second piston rod is slidably and sealed in both second sleeves, and a return spring is installed between the second piston rod and the second sleeve. A pressure plate is installed at the front end of the two second piston rods. The pressing plates of the three pressing units work together to complete the compression and restriction action.

[0015] Furthermore, two limiting seats are symmetrically installed at the top of the conveying sleeve and the bottom of the traction sleeve. A sliding arm is slidably installed on the top of each limiting seat, and a guide roller is installed at the front end of the sliding arm via a bracket. The guide roller guides the raw filament bundle through the traction sleeve and the conveying sleeve.

[0016] Furthermore, multiple through holes are evenly spaced and drilled in parallel on the sliding arm, and a reinforcing bolt is slidably inserted through the limiting seat. The reinforcing bolt passes through the through holes to restrict the sliding arm to the limiting seat.

[0017] The present invention also provides a conveying method for the solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor fibers, the conveying method specifically including the following steps:

[0018] Step 1: First, the solidified raw filament bundle is guided and transferred by the guide roller, and then the raw filament bundle is introduced into the first conveying mechanism;

[0019] Step 2: Subsequently, the first conveying mechanism actively guides and restricts the rotation of the raw filament bundle in the coagulation bath, so that the raw filament bundle can fully contact the coagulation liquid in the coagulation bath to complete the coagulation operation. At the same time, the first conveying mechanism actively assists in conveying the raw filament bundle in the coagulation bath.

[0020] Step 3: Then, the power is transmitted to the second conveying mechanism via the linkage mechanism, so that the first conveying mechanism and the second conveying mechanism form a raw filament bundle conveying system;

[0021] Step 4: Finally, the second conveying mechanism completes the reciprocating pulling of the solidified raw filament bundle, thereby completing the continuous reciprocating outward pulling and conveying of the raw filament bundle, so that the raw filament bundle can be continuously extracted from the solidification bath and conveyed.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The present invention features a first conveying mechanism. First, the motor is started. Since the two conveying rollers are linked with the conveying chain through the sprocket, the two conveying rollers are driven to rotate synchronously by the conveying chain. The rotating conveying rollers are used to actively guide and convey the raw filament bundle, ensuring the stable conveying of the raw filament bundle in the coagulation bath. At the same time, a pressure roller is set above the conveying rollers. The pressure roller is used to restrict the top of the raw filament bundle on the conveying rollers, ensuring stable contact between the raw filament bundle and the conveying roller. The two conveying rollers and the two pressure rollers complete the restriction and active conveying of the raw filament bundle in the coagulation bath.

[0024] 2. The present invention is equipped with a linkage mechanism. When the conveying roller rotates, it drives the second gear to rotate. The power of the second gear is transmitted to the third gear through the first gear, thereby driving the transmission shaft to rotate. When the transmission shaft rotates, it drives the linkage shaft to rotate off the center of the transmission shaft. The offset of the transmission shaft is continuously and repeatedly transmitted to the traction sleeve on the second conveying mechanism through two rings and rocker arms. This drives the traction sleeve to move up and down and back and forth in the conveying sleeve, thus completing the reciprocating pulling and conveying of the raw filament bundle.

[0025] 3. This invention features a second conveying mechanism. During the up-and-down movement of the traction sleeve, the first sleeve moves in tandem with it. As the first sleeve moves up and down, the first piston rod moves within it to transfer and convey gas. The gas in the first sleeve is sent into the annular cavity by the compression of the first piston rod. The gas is then sent into the second sleeve through multiple branch pipes. This pushes the second piston rod to extend against the tension of the return spring, driving the pressure plate to move and perform frictional compression and restriction on the raw filament bundle. As the traction sleeve continues to move upward, the compression and restriction of the raw filament bundle by the pressure plate causes the raw filament bundle to move upward, completing the traction and conveying process.

[0026] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] Figure 1 This is the overall front view of the invention;

[0028] Figure 2 This is a schematic diagram of the first conveying mechanism of the present invention installed in the coagulation bath.

[0029] Figure 3 This is a schematic diagram of the second conveying mechanism of the present invention installed on the coagulation bath.

[0030] Figure 4 This is a schematic diagram showing the distribution of the first conveying mechanism and the second conveying mechanism of the present invention;

[0031] Figure 5 This is a schematic diagram showing the connection between the linkage mechanism and the second conveying mechanism of the present invention;

[0032] Figure 6 This is a schematic diagram showing the distribution of the conveyor rollers and pressure rollers of the present invention;

[0033] Figure 7 This is a schematic diagram of the linkage mechanism of the present invention;

[0034] Figure 8 This is a schematic diagram showing the distribution of the conveyor rollers and drive shaft of the present invention;

[0035] Figure 9 This is a schematic diagram of the connection between the rocker arm and the linkage shaft of the present invention;

[0036] Figure 10 This is a schematic diagram of the connection between the rocker arm and the traction sleeve of the present invention;

[0037] Figure 11 This is a schematic diagram of the second conveying mechanism of the present invention;

[0038] Figure 12 This is a schematic diagram showing the distribution of the three clamping units within the traction sleeve of the present invention;

[0039] Figure 13 This is a schematic diagram showing the distribution of the air supply unit and the pressing unit of the present invention;

[0040] Figure 14 This is a schematic diagram of the gas supply unit structure of the present invention;

[0041] Figure 15 This is a schematic diagram of the clamping unit structure of the present invention;

[0042] Figure 16 This is a schematic diagram of the internal structure of the pressure relief pipe of the present invention.

[0043] In the diagram: 1. Coagulation bath; 2. Guide roller; 3. Adjusting seat; 4. Conveying roller; 5. Sprocket; 6. Conveying chain; 7. Motor; 8. Adjusting zone; 9. Slider; 10. Adjusting screw; 11. Pressure roller; 12. Gear No. 1; 13. Gear No. 2; 14. Drive shaft; 15. Gear No. 3; 16. Cut-off zone; 17. Transmission plate; 18. Linkage shaft; 19. Ring; 20. Rocker arm; 21. Fixing frame; 22. Conveying sleeve; 23. Traction sleeve; 24. Blocking ring; 25. Fixing plate; 2 6. Annular cavity; 27. No. 1 sleeve; 28. No. 1 piston rod; 29. ​​No. 1 pipe; 30. No. 2 pipe; 31. Pressure relief pipe; 32. Main conveying pipe; 33. Branch pipe; 34. No. 2 sleeve; 35. No. 2 piston rod; 36. Return spring; 37. Pressure plate; 38. Limiting seat; 39. Sliding arm; 40. Guide roller; 41. Through hole; 42. Reinforcing bolt; 43. Top cover; 44. Pressure relief hole; 45. Sealing head; 46. Fine-tuning screw; 47. Pressure adjusting spring; 48. Annular flange; 49. Adjusting plate. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0045] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0046] Example 1: The present invention provides a technical solution: such as Figure 1 , Figure 3 and Figure 4 As shown, a conveying device for solidifying and forming polyacrylonitrile dry-jet wet spinning precursor yarn includes a solidification bath 1. A guide roller 2 is rotatably installed on one side of the top of the solidification bath 1. A first conveying mechanism is installed at the bottom of the solidification bath 1, located on one side of the guide roller 2. The first conveying mechanism restricts the precursor yarn bundle within the solidification bath 1 to complete solidification. The first conveying mechanism is used to guide and restrict the rotation of the solidified precursor yarn bundle. A second conveying mechanism is installed on the top side of the solidification bath 1, away from the guide roller 2. The second conveying mechanism is used to perform reciprocating pulling and conveying actions on the precursor yarn bundle. A linkage mechanism is installed on one side of the bottom of the solidification bath 1. The linkage mechanism enables the power linkage between the first and second conveying mechanisms. The linkage mechanism combines the first and second conveying mechanisms into a precursor yarn bundle conveying system, which conveys the precursor yarn bundle in the solidification bath 1.

[0047] Example 2: Based on the first conveying mechanism provided in Example 1, this example provides a further technical solution for the first conveying mechanism.

[0048] like Figure 2 and Figures 5-10 As shown, the first conveying mechanism includes four rectangular adjustment seats 3 distributed at the bottom of the coagulation bath 1, and two conveying rollers 4 are rotatably mounted parallel to each other at the bottom of the coagulation bath 1. The two ends of the two conveying rollers 4 are rotatably connected to the two parallel adjustment seats 3 respectively. One end of the two conveying rollers 4 is respectively sealed and rotatably passed through the adjustment seats 3 and the coagulation bath 1. A sprocket 5 is fixedly sleeved at the end of the two conveying rollers 4 that extends out of the coagulation bath 1. A conveying chain 6 is driven between the two sprockets 5. A motor 7 is mounted on one side of the outer wall of the coagulation bath 1 through a bracket. The output end of the motor 7 is drivenly connected to one of the conveying rollers 4. The two conveying rollers 4 complete the rotational conveying of the raw filament bundle. An adjustment area 8 is opened through each of the four adjustment seats 3. A slider 9 is slidably installed in the adjustment area 8. An adjustment screw 10 is threaded through the top of the adjustment seat 3. The bottom of the adjustment screw 10 is rotatably connected to the upper surface of the slider 9. A pressure roller 11 is installed above each of the two conveying rollers 4, and the two ends of the pressure roller 11 are rotatably connected to the corresponding slider 9 respectively.

[0049] During rotational guidance: A first conveying mechanism is provided. First, the motor 7 is started, driving the conveying roller 4 connected to it. Since the two conveying rollers 4 are linked with the conveying chain 6 through the sprocket 5, the two conveying rollers 4 are driven to rotate synchronously through the conveying chain 6. The rotating conveying rollers 4 complete the active rotational guidance and conveying of the raw filament bundle, ensuring the stable conveying of the raw filament bundle in the coagulation bath 1. At the same time, a pressure roller 11 is set above the conveying roller 4. The pressure roller 11 completes the top restriction of the raw filament bundle on the conveying roller 4, ensuring stable contact between the raw filament bundle and the conveying roller 4. The two conveying rollers 4 and the two pressure rollers 11 complete the restriction and active conveying of the raw filament bundle in the coagulation bath 1. The distance between the pressure roller 11 and the conveying roller 4 can be adjusted by rotating the adjusting screw 10, driving the slider 9 to slide up and down in the adjustment area 8, thereby driving the pressure roller 11 to move up and down to adjust the distance between it and the conveying roller 4.

[0050] In this embodiment of the invention, the linkage mechanism includes a first gear 12 detachably and rotatably mounted on one side of the bottom of the coagulation bath 1, a second gear 13 fixedly sleeved on one end of one of the conveying rollers 4, a transmission shaft 14 rotatably mounted on one side of the bottom of the coagulation bath 1, and a third gear 15 fixedly sleeved on one end of the transmission shaft 14. The first gear 12 meshes with the second gear 13 and the third gear 15. A cut-off area 16 is provided in the middle of the transmission shaft 14. Two transmission plates 17 connected to the transmission shaft 14 are provided on both sides of the cut-off area 16. A linkage shaft 18 is provided between the two transmission plates 17, offset from the axis of the transmission shaft 14. Two rings 19 are symmetrically rotatably sleeved on the linkage shaft 18. The transmission shaft 14, transmission plates 17, linkage shaft 18 and rings 19 together form a crank structure. Rocker arms 20 are fixedly mounted on both rings 19.

[0051] When the linkage is activated: a linkage mechanism is provided, and the rotation of the conveyor roller 4 drives the second gear 13 to rotate. The power of the second gear 13 is transmitted to the third gear 15 via the first gear 12, thereby linking the drive shaft 14 to rotate. During the rotation of the drive shaft 14, the linkage shaft 18 is driven to rotate off-center from the center of the drive shaft 14. The offset of the drive shaft 14 is continuously and reciprocally transmitted to the traction sleeve 23 on the second conveying mechanism through the two rings 19 and the rocker arm 20. This drives the traction sleeve 23 to move up and down reciprocally within the conveying sleeve 22, completing the reciprocating pulling and conveying of the raw filament bundle. At the same time, the first gear 12, the second gear 13, and the third gear 15 can be connected. Gear 15 can be adjusted and replaced with gears of different gear ratios to control speed increase (e.g., the number of teeth of gear 12 and gear 13 is greater than that of gear 15), speed decrease (e.g., the number of teeth of gear 12 and gear 13 is less than that of gear 15), or maintain the same speed (e.g., the number of teeth of gear 12, gear 13, and gear 15 are the same). At the same time, other combinations can be made between gear 12, gear 13, and gear 15 to complete speed increase and speed decrease actions. There are no restrictions here, which ensures the stability of the raw filament bundle during transportation and facilitates the control of the reciprocating traction speed required by the staff.

[0052] Example 3: Based on the second conveying mechanism provided in Example 1, this example provides a further technical solution for the second conveying mechanism.

[0053] like Figures 11-16As shown, the second conveying mechanism includes a fixed frame 21 installed on one side of the top of the coagulation bath 1. A conveying sleeve 22 is detachably provided on the fixed frame 21. The conveying sleeve 22 has a through-hole design. A traction sleeve 23 is slidably restricted at the bottom inside the conveying sleeve 22. The traction sleeve 23 has a through-hole design. A track is provided on the inner wall of the conveying sleeve 22 to cooperate with the traction sleeve 23. The track restricts the up and down sliding of the traction sleeve 23. A blocking ring 24 is fixedly sleeved on the bottom outside of the traction sleeve 23. Fixing plates 25 are symmetrically installed at both ends of the blocking ring 24. The two fixing plates 25 are respectively connected to the linkage mechanism. The lower surfaces of the two fixing plates 25 are respectively hinged to the top of the two rocker arms 20. Three pressing units are arranged in a circular array inside the traction sleeve 23. An air supply unit is installed at the bottom of the traction sleeve 23. The air supply unit is connected to the three pressing units.

[0054] In this embodiment of the invention, the gas supply unit includes an annular cavity 26 installed at the bottom of the traction sleeve 23, and a first sleeve 27 is fixedly inserted into each of the two fixing plates 25. The length of the first sleeve 27 is greater than the amount of movement of the traction sleeve 23 within the conveying sleeve 22, meaning that the movement and extension of the first piston rod 28 within the first sleeve 27 does not interfere with the movement of the traction sleeve 23 within the conveying sleeve 22. Furthermore, the gas capacity of the two first sleeves 27 is greater than the gas capacity of the multiple second sleeves 34, meaning that the two first sleeves 27 can quickly push out the pressure plate 37 after the multiple second sleeves 34 have been filled with gas. A first piston rod 28 is slidably installed within the first sleeve 27, and the top of the first piston rod 28 is connected to the side wall of the conveying sleeve 22. A first pipe 29 is connected to one side of the bottom of the first sleeve 27, and a one-way valve for controlling the one-way introduction of gas into the first sleeve 27 is installed at the end of the first pipe 29. The other side of the bottom of the first sleeve 27 is connected to... A second pipe 30 is installed, and a pressure relief pipe 31 is connected to the bottom of the first sleeve 27. The pressure relief pipe 31 can adjust the limiting air pressure value. A top cover 43 is detachably and sealingly installed on the top of the pressure relief pipe 31. Two pressure relief holes 44 are symmetrically and parallelly opened through the pressure relief pipe 31. A sealing head 45 is slidably and sealingly installed inside the pressure relief pipe 31. A fine-tuning screw 46 is threadedly threaded through the center of the top cover 43. An adjusting plate is slidably installed on the top of the pressure relief pipe 31. 49. The bottom of the fine-tuning screw 46 is rotatably connected to the upper surface of the adjusting plate 49. A pressure adjusting spring 47 is installed between the adjusting plate 49 and the sealing head 45. An annular flange 48 is provided on the inner wall of the pressure relief pipe 31 below the pressure relief hole 44. The sealing head 45 contacts the annular flange 48 inside the pressure relief pipe 31 to block the pressure relief hole 44. When the sealing head 45 moves upward, the pressure relief hole 44 is exposed to complete the pressure relief action. The second pipe 30 is connected to the annular cavity 26 through a pipe.

[0055] All three clamping units include a main conveying pipe 32, which is mounted inside a traction sleeve 23 via a bracket. Two branch pipes 33 are symmetrically arranged on the main conveying pipe 32. Two secondary sleeves 34 are located on one side of the two branch pipes 33 on the inner wall of the traction sleeve 23, with the two branch pipes 33 respectively communicating with the bottom of the two secondary sleeves 34. Gas is introduced into the secondary sleeves 34 through the branch pipes 33 to push out the secondary piston rod 35. A secondary piston rod is slidably and sealingly installed inside each of the two secondary sleeves 34. 35, and a return spring 36 is installed between the second piston rod 35 and the second sleeve 34. The return spring 36 pulls the second piston rod 35 back into the second sleeve 34. A pressure plate 37 is installed at the front end of the two second piston rods 35. The shape and size of the pressure plate 37 are adapted and replaced according to the size of the original filament bundle to ensure stable contact between the pressure plate 37 and the original filament bundle. An anti-slip pad is installed on the inner wall of the pressure plate 37. The pressure plates 37 of the three pressing units work together to complete the compression and restriction action.

[0056] During reciprocating traction: A second conveying mechanism is provided, and the rocker arm 20 reciprocates to push the traction sleeve 23 to move up and down in the conveying sleeve 22. During the up and down movement of the traction sleeve 23, the first sleeve 27 moves up and down in conjunction with it. During the up and down movement of the first sleeve 27, the first piston rod 28 moves within the first sleeve 27 to complete the transfer and conveying of gas. The gas in the first sleeve 27 is sent into the annular cavity 26 by the compression of the first piston rod 28. The gas is then sent into the three conveying main pipes 32 through the annular cavity 26. The gas is then sent into the second sleeve 34 through multiple branch pipes 33. The second piston rod 35 is pushed to overcome the tension of the return spring 36 and extend. The pressure plate 37 is driven to move to perform friction compression and restriction on the raw filament bundle. Subsequently, as the traction sleeve 23 continues to move upward, the compression and restriction of the raw filament bundle by the pressure plate 37 drives the raw filament bundle to move upward to complete the traction and conveying.

[0057] Simultaneously, as the traction sleeve 23 moves downward, the first piston rod 28 moves along with it, drawing back the gas from the multiple second sleeves 34, and introducing external gas into the first sleeve 27 through the first pipe 29 to ensure the stable reset of the first piston rod 28. Under the action of the reset spring 36, the second piston rod 35 is pulled to reset, so that the pressure plate 37 is separated from the original filament bundle without restriction. Therefore, when the traction sleeve 23 moves downward, it does not interfere with the original filament bundle, thus enabling the reciprocating pulling and conveying of the original filament bundle in coordination with the reciprocating up and down movement of the traction sleeve 23.

[0058] Since the No. 1 sleeve 27 is interconnected with multiple No. 2 sleeves 34, the pressure values ​​within them are consistent. If it is necessary to control the extension distance and clamping force of the pressure plate 37, simply rotate the fine-tuning screw 46 to adjust the limiting pressure value of the pressure relief pipe 31. Specifically, rotating the fine-tuning screw 46 pushes the adjusting plate 49 downwards to compress the pressure regulating spring 47, or adjusts the adjusting plate 49 upwards to reduce pressure. The pressure regulating spring 47 is used to adjust the sealing head 45 to different pressure levels. Subsequently, the air pressure overcomes the elasticity of the pressure regulating spring 47, pushing the sealing head 45 open and discharging it through the pressure relief hole 44. The pressure relief function allows staff to adjust the pressure according to different needs, ensuring stable clamping and conveying of the raw filament bundles. Testing is conducted to adapt to conveying raw filament bundles of different sizes. Specifically, when the first piston rod 28 compresses gas into the second sleeve 34, the pressure is controlled by the pressure relief pipe 31. Once the predetermined pressure value is reached, the pressure relief pipe 31 releases the gas, preventing further gas flow into the second sleeve 34. Therefore, the extension of the second piston rod 35 within the second sleeve 34 can be controlled by the pressure value within the first sleeve 27, facilitating adjustment by staff.

[0059] In this embodiment of the invention, two limiting seats 38 are symmetrically installed at the top of the conveying sleeve 22 and the bottom of the traction sleeve 23. Sliding arms 39 are slidably installed on the top of each limiting seat 38, and guide rollers 40 are installed at the front end of the sliding arms 39 via brackets. The guide rollers 40 guide the raw filament bundle through the traction sleeve 23 and the conveying sleeve 22. Multiple through holes 41 are evenly and parallelly opened on the sliding arms 39, and reinforcing bolts 42 are slidably inserted on the limiting seats 38. The reinforcing bolts 42 pass through the through holes 41 to restrict the sliding arms 39 on the limiting seats 38. The guide rollers 40 can guide the raw filament bundle to avoid scratching. At the same time, the guide rollers 40 can slide on the limiting seats 38 through the multiple through holes 41 on the sliding arms 39 to achieve position adjustment. The reinforcing bolts 42 pass through the through holes 41 to restrict the sliding arms 39 and the guide rollers 40.

[0060] Example 4: A conveying method for the solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn, the conveying method specifically includes the following steps:

[0061] Step 1: First, the solidified raw filament bundle is guided and transferred by guide roller 2, and then the raw filament bundle is introduced into the first conveying mechanism;

[0062] Step 2: Subsequently, the first conveying mechanism actively guides and restricts the rotation of the raw filament bundle in the coagulation bath 1, so that the raw filament bundle can fully contact the coagulation liquid in the coagulation bath 1 to complete the coagulation operation. At the same time, the first conveying mechanism actively assists in conveying the raw filament bundle in the coagulation bath 1.

[0063] Step 3: Then, the power is transmitted to the second conveying mechanism via the linkage mechanism, so that the first conveying mechanism and the second conveying mechanism form a raw filament bundle conveying system;

[0064] Step 4: Finally, the second conveying mechanism completes the reciprocating pulling of the solidified raw filament bundle, thereby completing the continuous reciprocating outward pulling and conveying of the raw filament bundle, so that the raw filament bundle can be continuously extracted from the solidification bath 1 and conveyed.

[0065] This invention provides a conveying device and method for solidifying and forming polyacrylonitrile dry-jet wet spinning precursor yarn. The specific working principle is as follows: First, a solidification liquid is injected into the solidification bath 1 for processing. Then, the spinning liquid is sprayed out through the spinneret assembly and sent into the solidification bath 1 to contact the solidification liquid and complete the solidification treatment of the sprayed precursor yarn. After that, the precursor yarn is guided and rectified into a precursor yarn bundle by the rectifier hood. Subsequently, the solidified precursor yarn bundle is guided and transferred by the guide roller 2.

[0066] The raw filament bundle is then introduced into the first conveying mechanism, which actively guides and restricts its rotation within the coagulation bath 1. This ensures the raw filament bundle fully contacts the coagulating liquid in the coagulation bath 1, completing the coagulation process. Simultaneously, a linkage mechanism transmits power to the second conveying mechanism, forming a raw filament bundle conveying system. The second conveying mechanism reciprocates and pulls the solidified raw filament bundle, continuously and reciprocatingly pulling it outwards. This allows the raw filament bundle to be continuously extracted from the coagulation bath 1, completing the conveying process. The first conveying mechanism actively transports the raw filament bundle in the coagulation bath 1, while the second conveying mechanism continuously pulls and transports the raw filament bundle. This ensures that the raw filament bundle is transported smoothly in the coagulation bath 1, avoiding deformation and other problems caused by a single external power device. It also ensures that the tension of the raw filament bundle is balanced, so that the raw filament bundle does not rely solely on the tension provided by the external power device to move in the coagulation bath 1. This makes the movement of the raw filament bundle more stable and smooth, and avoids the problem of uneven tension provided by the external power device due to an excessively long movement path of the raw filament bundle in the coagulation bath 1.

[0067] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn, comprising a solidification bath (1), wherein a guide roller (2) is rotatably mounted on one side of the top of the solidification bath (1), characterized in that: A first conveying mechanism is installed at the bottom of the coagulation bath (1) on one side of the guide roller (2). The first conveying mechanism restricts the raw filament bundle in the coagulation bath (1) to complete the coagulation. The first conveying mechanism is used to complete the rotational guidance restriction of the coagulated raw filament bundle. A second conveying mechanism is installed on the top of the coagulation bath (1) away from the guide roller (2). The second conveying mechanism is used to complete the reciprocating pulling and conveying action of the raw filament bundle. A linkage mechanism is installed at the bottom of the coagulation bath (1). The linkage mechanism completes the power linkage between the first conveying mechanism and the second conveying mechanism. The linkage mechanism combines the first conveying mechanism and the second conveying mechanism into a raw filament bundle conveying system. The raw filament bundle is conveyed in the coagulation bath (1) through the raw filament bundle conveying system. The second conveying mechanism includes a fixed frame (21) installed on one side of the top of the coagulation bath (1). A conveying sleeve (22) is detachably provided on the fixed frame (21). A traction sleeve (23) is provided at the bottom of the conveying sleeve (22) for sliding restriction. A blocking ring (24) is fixedly sleeved at the bottom of the traction sleeve (23). Fixed plates (25) are symmetrically installed at both ends of the blocking ring (24). The two fixed plates (25) are respectively connected to the linkage mechanism. Three clamping devices are arranged in a circular array inside the traction sleeve (23). The unit includes an annular cavity (26) installed at the bottom of the traction sleeve (23), which is connected to three pressing units. The air supply unit includes an annular cavity (26) installed at the bottom of the traction sleeve (23), and a No. 1 sleeve (27) is fixedly installed on both fixed plates (25). A No. 1 piston rod (28) is installed in the No. 1 sleeve (27) and the top of the No. 1 piston rod (28) is connected to the side wall of the conveying sleeve (22). A No. 1 pipe (29) is connected to one side of the bottom of the No. 1 sleeve (27). A second pipe (30) is connected to the other side of the bottom of the sleeve (27), and a pressure relief pipe (31) is connected to the bottom of the first sleeve (27). The second pipe (30) is connected to the annular cavity (26) through a pipe. All three pressing units include a conveying main pipe (32). The conveying main pipe (32) is installed in the traction sleeve (23) through a bracket. Two branch pipes (33) are symmetrically arranged on the conveying main pipe (32). Two second sleeves (34) are arranged on one side of the two branch pipes (33) on the inner wall of the traction sleeve (23). Each branch pipe (33) is connected to the bottom of the two No. 2 sleeves (34). Gas is introduced into the No. 2 sleeves (34) through the branch pipe (33) to push out the No. 2 piston rod (35). The No. 2 piston rod (35) is slidably and sealed in both No. 2 sleeves (34). A return spring (36) is installed between the No. 2 piston rod (35) and the No. 2 sleeve (34). A pressure plate (37) is installed at the front end of the two No. 2 piston rods (35). The compression and restriction action is completed by the pressure plates (37) of the three pressing units.

2. The conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn according to claim 1, characterized in that: The first conveying mechanism includes four rectangular adjustment seats (3) distributed at the bottom of the coagulation bath (1), and two conveying rollers (4) are installed in parallel rotation at the bottom of the coagulation bath (1). The two ends of the two conveying rollers (4) are respectively rotatably connected to the two parallel adjustment seats (3). One end of the two conveying rollers (4) is respectively sealed and rotated through the adjustment seat (3) and the coagulation bath (1). A sprocket (5) is fixedly sleeved at the end of the two conveying rollers (4) that extends out of the coagulation bath (1). A conveying chain (6) is driven between the two sprockets (5). A motor (7) is installed on one side of the outer wall of the coagulation bath (1) through a bracket. The output end of the motor (7) is drivenly connected to one of the conveying rollers (4).

3. The conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn according to claim 2, characterized in that: Each of the four adjustment seats (3) has an adjustment area (8) through which a slider (9) is slidably installed. An adjustment screw (10) is threaded through the top of the adjustment seat (3). The bottom of the adjustment screw (10) is rotatably connected to the upper surface of the slider (9). A pressure roller (11) is installed above each of the two conveying rollers (4), and both ends of the pressure roller (11) are rotatably connected to the corresponding slider (9).

4. The conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn according to claim 2, characterized in that: The linkage mechanism includes a first gear (12) that is detachably and rotatably installed on one side of the bottom of the coagulation bath (1), a second gear (13) that is fixedly sleeved on one end of one of the conveying rollers (4), a drive shaft (14) that is rotatably installed on one side of the bottom of the coagulation bath (1), and a third gear (15) that is fixedly sleeved on one end of the drive shaft (14), and the first gear (12) meshes with the second gear (13) and the third gear (15); A cut-off area (16) is provided in the middle of the transmission shaft (14). Two transmission plates (17) connected to the transmission shaft (14) are provided on both sides of the cut-off area (16). A linkage shaft (18) is provided between the two transmission plates (17) offset from the axis of the transmission shaft (14). Two rings (19) are symmetrically rotated on the linkage shaft (18). Rocker arms (20) are fixedly installed on both rings (19).

5. The conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn according to claim 1, characterized in that: Two limiting seats (38) are symmetrically installed at the top of the conveying sleeve (22) and the bottom of the traction sleeve (23). Sliding arms (39) are slidably installed on the top of the two limiting seats (38), and guide rollers (40) are installed at the front end of the sliding arms (39) via brackets. The guide rollers (40) guide the raw filament bundle through the traction sleeve (23) and the conveying sleeve (22).

6. The conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn according to claim 5, characterized in that: Multiple through holes (41) are evenly spaced and arranged side by side on the sliding arm (39), and a reinforcing bolt (42) is slidably inserted on the limiting seat (38). The reinforcing bolt (42) passes through the through holes (41) to restrict the sliding arm (39) on the limiting seat (38).

7. A conveying method for solidifying and forming polyacrylonitrile dry-jet wet-spinning precursor fibers, characterized in that: The conveying device for solidification and forming of polyacrylonitrile dry-jet wet-spinning precursor yarn as described in any one of claims 1-6 specifically includes the following steps: Step 1: First, the solidified raw filament bundle is guided and transferred by the guide roller (2), and then the raw filament bundle is introduced into the first conveying mechanism; Step 2: Then, the first conveying mechanism actively guides and restricts the rotation of the raw filament bundle in the coagulation bath (1), so that the raw filament bundle can fully contact the coagulation liquid in the coagulation bath (1) to complete the coagulation operation. At the same time, the first conveying mechanism actively assists in conveying the raw filament bundle in the coagulation bath (1). Step 3: Then, the power is transmitted to the second conveying mechanism via the linkage mechanism, so that the first conveying mechanism and the second conveying mechanism form a raw filament bundle conveying system; Step 4: Finally, the second conveying mechanism completes the reciprocating pulling of the solidified raw filament bundle, thereby completing the continuous reciprocating outward pulling of the raw filament bundle to complete the conveying, so that the raw filament bundle can be continuously extracted from the solidification bath (1) to complete the conveying, thus improving production efficiency.

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