Carbon fiber washing device

Abstract

A carbon fiber washing device comprises a washing tank, a pressurizing sleeve is arranged in the washing tank, sleeve openings allowing carbon fiber precursors to pass through and discharging cleaning liquid are formed in the two ends of the pressurizing sleeve, and the water pressure in the pressurizing sleeve is higher than that in the washing tank. The carbon fiber precursors are washed in the water tank under more than two kinds of pressure, the pressurizing sleeve is arranged in the washing tank, after the carbon fiber precursors enter the water tank, the washing tank and the pressurizing sleeve apply different water pressure to the surfaces of the carbon fiber precursors, under the condition that the water pressure is high, the carbon fiber precursors can be tightened, and the carbon fiber precursors can be washed in the water tank. And under the normal pressure and the water pressure, precursor fibers of the carbon fibers are loosened, and the tightness among the fibers can promote the discharge of the solvent and facilitate the immersion of a cleaning solution into the gaps of the fibers, so that a better cleaning effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber water washing, and specifically refers to a carbon fiber water washing device. Background Art

[0002] During the production process of carbon fiber precursor, especially after the primary fiber has passed through the coagulation bath, some solvents or coagulation liquids will remain on its surface and inside. If these residues are not removed in time, they will have adverse effects in the subsequent pre-oxidation and carbonization processes. Water washing can effectively clean these residues and prevent them from causing fusion between fibers during high-temperature treatment, thereby affecting the quality of the carbon fiber.

[0003] At present, the washing of carbon fiber precursor is usually done in a water tank by immersion, spraying or a combination of the two. Since there is residual solvent between the fibers of the carbon fiber precursor, the above-mentioned washing method requires a long water tank length, resulting in a large amount of water consumption. In order to improve the cleaning efficiency, it is generally combined with a beating roller, ultrasonic wave and other methods, but the above-mentioned methods are easy to damage the fiber, resulting in hairy and broken fibers in the precursor. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention creatively adopts a carbon fiber water washing device to at least partially solve the problems raised in the above background technology.

[0005] The technical solution adopted is as follows: The present invention proposes a carbon fiber washing device, comprising: A water tank, the water tank comprising a water washing tank and a feed window and a discharge window for the carbon fiber precursor to enter and exit; An extrusion roller group is arranged in the water tank and can extrude the carbon fiber precursor tow; A guide roller group, arranged in the water tank and used for guiding the carbon fiber precursor; Among them, a boosting sleeve is provided in the water washing tank, and the boosting sleeve is connected to an external liquid supply device. Both ends of the boosting sleeve have sleeve openings for the carbon fiber precursor to pass through and the cleaning liquid to be discharged, and the water pressure in the boosting sleeve is higher than the water pressure in the water washing tank, so that the carbon fiber precursor is washed in the water tank under more than two pressures.

[0006] Further, the booster sleeve comprises a sleeve shell and a liquid supply support tube arranged on the side wall of the sleeve shell, the interior of the sleeve shell has a pressure chamber, and both ends of the sleeve shell have sleeve ports connected to the pressure chamber, one end of the liquid supply support tube is connected to the pressure chamber, and the other end is connected to the liquid supply device; The end of the barrel shell is fixedly connected with a guide fin, and the guide fin is constructed to guide the cleaning liquid discharged from the sleeve mouth to the surface of the carbon fiber precursor. The guide direction of the cleaning liquid by the guide fin is parallel or inclined to the axial direction of the carbon fiber precursor.

[0007] Furthermore, a liquid distribution ring is fixedly provided on the outer side of the barrel shell, a flow equalizing plate is provided on the inner side of the barrel shell corresponding to the liquid distribution ring, a liquid distribution cavity is provided between the liquid distribution ring and the flow equalizing plate, a plurality of evenly distributed flow guide holes are provided on the surface of the flow equalizing plate, the flow guide holes connect the liquid distribution cavity and the pressure cavity, the liquid supply support tube is fixed on the outer wall of the liquid distribution ring and is connected with the liquid distribution cavity, a plurality of evenly distributed axial guide plates are provided on the inner side wall of the barrel shell, and the axial guide plates are configured to guide the cleaning liquid flowing out of the flow guide holes vertically to the surface of the carbon fiber precursor.

[0008] Furthermore, the cross-sectional area of ​​the pressure chamber is larger than the cross-sectional area of ​​the sleeve mouth, and a guide section is provided between the pressure chamber and the sleeve mouth to ensure a smooth transition at the connection between the pressure chamber and the sleeve mouth. An electric heating film is provided on the outer wall of the barrel shell, and the electric heating film is connected to an external temperature controller.

[0009] Furthermore, there is more than one boosting sleeve in the water washing tank, the pressure in each boosting sleeve is the same or different, and when the pressure in the boosting sleeve is different, the pressure in two adjacent boosting sleeves increases or decreases step by step, and any two adjacent cylinder shells are connected by the guide fins, and the length of each guide fin is the same or different.

[0010] Furthermore, a partition is fixedly provided in the water tank, and the water washing tank is separated into a first cleaning tank and a second cleaning tank by the partition, the extrusion roller group is located in the first cleaning tank on one side close to the feed window, the booster sleeve is located in the second cleaning tank, and the guide roller group is used to guide the carbon fiber precursor to pass through the booster sleeve and pass through the discharge window; The volume ratio of the first cleaning tank to the second cleaning tank is less than 1, and the first cleaning tank and the second cleaning tank are respectively provided with a first drain pipe and a second drain pipe, and the first drain pipe and the second drain pipe are respectively connected to two sets of circulation systems.

[0011] Furthermore, the squeezing roller group includes a pair of water-pressing rollers in contact with each other, the water-pressing roller includes a roller core and a roller sleeve, the roller sleeve is fixedly sleeved on the outside of the roller core, and the roller sleeve includes an elastic sleeve, and the two roller sleeves have elastic pre-pressure when they are in contact, which is used to apply pressure to the carbon fiber precursor passing through the squeezing roller group.

[0012] Furthermore, the extrusion roller group is arranged horizontally in the first cleaning tank, and the carbon fiber precursor passes through the extrusion roller group in a vertical direction. A flushing nozzle is provided below the extrusion roller group, and the flushing nozzle is configured to spray cleaning liquid to the contact area of ​​the extrusion roller group.

[0013] Furthermore, the flushing nozzle includes a liquid supply pipe fixed inside the water tank and a nozzle installed on the liquid supply pipe, the input end of the liquid supply pipe is connected to the liquid supply device, the nozzle is arranged at the output end of the liquid supply pipe, and can spray cleaning liquid onto the extrusion roller group and / or the surface of the carbon fiber precursor.

[0014] Furthermore, it includes a plurality of water tanks stacked in the height direction, the feed windows and the first cleaning trough in the water tanks are staggered in the height direction, and a guide window for the carbon fiber precursor to enter / exit is provided on the top of the water tank, so that the carbon fiber precursor is transported in a serpentine path in the plurality of water tanks, and the pressure of the extrusion roller groups in the plurality of water tanks on the carbon fiber precursor is gradually increased.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: The present invention arranges a boosting sleeve in a water washing tank. When the carbon fiber precursor enters the water tank, the water washing tank and the boosting sleeve respectively apply different water pressures to the surface of the carbon fiber precursor. Under high water pressure, the fibers of the carbon fiber precursor will tighten, squeezing out the solvent inside the fiber gaps. Under normal water pressure, the fibers of the carbon fiber precursor will relax. The tightness between the fibers will promote the discharge of the solvent, and is beneficial for the cleaning liquid to penetrate into the fiber gaps, thereby achieving a better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the internal structure of a carbon fiber washing device proposed in an embodiment of the present invention; Figure 2 A schematic diagram of the three-dimensional structure of the interior of a carbon fiber washing device proposed in an embodiment of the present invention; Figure 3 A schematic diagram of the internal structure of a water tank is provided for an embodiment of the present invention; Figure 4 A schematic diagram of the three-dimensional structure of a pressurizing sleeve provided in an embodiment of the present invention; Figure 5 A schematic diagram of the internal structure of a pressurizing sleeve is provided for an embodiment of the present invention; Figure 6 The present invention provides a schematic diagram of a half-section structure of a booster sleeve according to an embodiment of the present invention.

[0017] Among them, 10, water tank; 100, water washing tank; 101, feed window; 102, first cleaning tank; 103, second cleaning tank; 104, discharge window; 105, first liquid discharge pipe; 106, second liquid discharge pipe; 11, partition; 12, guide plate window; 20, extrusion roller group; 21, roller core; 22, roller sleeve; 30, flushing nozzle; 31, nozzle; 32, liquid supply pipe; 40, guide roller group; 41, first guide roller; 42, second guide roller; 50, booster sleeve; 500, pressure chamber; 501, sleeve mouth; 502, guide section; 51, cylinder shell; 511, axial guide plate; 52, liquid distribution ring; 521, liquid distribution chamber; 53, flow equalizing plate; 531, guide hole; 54, guide fin; 55, liquid supply support tube; 56, electric heating film.

[0018] The accompanying drawings are used to provide further understanding of the embodiments and constitute a part of the specification. They are used for explanation together with the embodiments and do not constitute a limitation of the embodiments. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments.

[0021] In an embodiment of the present invention, a carbon fiber washing device is provided, which can improve the washing efficiency without damaging the carbon fiber precursor. The device mainly includes a water tank 10, an extrusion roller group 20, a guide roller group 40 and a booster sleeve 50.

[0022] like Figure 3As shown, the water tank 10 includes a washing tank 100 and a feed window 101 and a discharge window 104 for carbon fiber precursors to enter and exit. The squeezing roller group 20 is arranged in the water tank 10 and can extrude the carbon fiber precursor tows. The guide roller group 40 is arranged in the water tank 10 and is used to guide the carbon fiber precursors. The carbon fiber precursors enter the water tank 10 from the feed window 101 under the action of the conveying device, and pass through the squeezing roller group 20 and the guide roller group 40 in turn, and then are guided out from the discharge window 104, so that the carbon fiber precursors complete the water washing process in the water tank 10. The water tank 10 contains a cleaning liquid mixed with water and a cleaning agent, and the cleaning liquid has a cleaning effect on the residual solvent on the carbon fiber.

[0023] Furthermore, in order to improve the cleaning effect of the carbon fiber precursor in the water washing tank 100, a boosting sleeve 50 is provided in the water washing tank 100, and the boosting sleeve 50 is connected to an external liquid supply device. Both ends of the boosting sleeve 50 have sleeve openings 501 for the carbon fiber precursor to pass through and for the cleaning liquid to be discharged, and the water pressure in the boosting sleeve 50 is higher than the water pressure in the water washing tank 100. Since the area of ​​the sleeve opening 501 is constant, the flow rate of the discharge is constant. When the discharge speed of the sleeve opening 501 is lower than the liquid supply speed of the liquid supply device relative to the boosting sleeve 50, the water pressure in the boosting sleeve 50 is greater than the water pressure in the water washing tank 100, so that the carbon fiber precursor is washed in the water tank 10 at more than two pressures.

[0024] In this way, the carbon fiber precursor is cleaned in the water washing tank 100 in the water tank 10 and in the pressurizing sleeve 50 under different water pressures respectively. Under high water pressure, the fibers of the carbon fiber precursor will tighten, squeezing out the solvent inside the fiber gaps. Under normal water pressure, the fibers of the carbon fiber precursor will relax. The tightness between the fibers will promote the discharge of the solvent and facilitate the cleaning liquid to penetrate into the gaps between the fibers, thereby achieving a better cleaning effect.

[0025] In some embodiments, the boost sleeve 50 includes a barrel shell 51 and a liquid supply support tube 55 arranged on the side wall of the barrel shell 51. The barrel shell 51 has a pressure chamber 500 inside, and the barrel shell 51 has sleeve ports 501 connected to the pressure chamber 500 at both ends. One end of the liquid supply support tube 55 is connected to the pressure chamber 500, and the other end is connected to a liquid supply device, wherein the liquid supply device includes a pump and a container for a cleaning liquid. The cleaning liquid is pumped out by the pump and input into the pressure chamber 500 in the barrel shell 51 through the liquid supply support tube 55. When the flow rate of the input cleaning liquid is greater than the flow rate of the cleaning liquid discharged from the sleeve port 501, the pressure of the cleaning liquid in the pressure chamber 500 on the carbon fiber raw fiber bundle will be higher than the pressure of the cleaning liquid in the water washing tank 100 on the carbon fiber raw fiber bundle. In this way, the carbon fiber raw fibers entering the pressure chamber 500 will be compressed, which will promote the extrusion of the solvent between the fiber gaps to improve the cleaning effect.

[0026] Furthermore, in order to promote the cleaning liquid to flow axially along the surface of the limiting wire, a guide fin 54 is fixedly connected to the end of the barrel shell 51. The guide fin 54 is constructed to guide the cleaning liquid discharged from the sleeve mouth 501 to the surface of the carbon fiber precursor. The guide direction of the cleaning liquid by the guide fin 54 is parallel or inclined to the axial direction of the carbon fiber precursor.

[0027] like Figure 4 , Figure 5 and Figure 6 As shown, the guide fin 54 is configured as a thin fin structure, and the guide fin 54 can guide the cleaning liquid discharged from the sleeve mouth 501 along the surface of the carbon fiber precursor, so that the cleaning liquid flows roughly along the axial direction of the carbon fiber precursor, and the solvent impurities attached to the surface of the fiber after extrusion are washed away, or washed into the gaps of the re-loosened fiber filaments, thereby improving the cleaning effect of the cleaning liquid on the carbon fiber.

[0028] like Figure 5 As shown, a liquid distribution ring 52 is fixedly provided on the outer side of the cylinder shell 51, and a flow equalizing plate 53 is provided on the inner side of the cylinder shell 51 corresponding to the liquid distribution ring 52. A liquid distribution cavity 521 is provided between the liquid distribution ring 52 and the flow equalizing plate 53. A plurality of evenly distributed flow guide holes 531 are provided on the surface of the flow equalizing plate 53. The flow guide holes 531 connect the liquid distribution cavity 521 and the pressure cavity 500. A liquid supply support tube 55 is fixed on the outer wall of the liquid distribution ring 52 and is connected with the liquid distribution cavity 521. A plurality of evenly distributed axial flow guide plates 511 are provided on the inner side wall of the cylinder shell 51. The axial flow guide plates 511 are configured to guide the cleaning liquid flowing out of the flow guide holes 531 vertically to the surface of the carbon fiber precursor.

[0029] When the cleaning liquid in the liquid supply support tube 55 flows into the pressure chamber 500, it needs to first enter the liquid distribution chamber 521 through the liquid distribution ring 52, and be evenly distributed on the surrounding side of the carbon fiber precursor in the annular liquid distribution chamber 521, and then enter the pressure chamber 500 from multiple directions through the guide holes 531 on the flow equalizing plate 53. The liquid flow guided out of the guide holes 531 will flow toward the surface of the carbon fiber precursor along the radial direction of the carbon fiber precursor, flushing the solvent impurities squeezed out from the surface of the fiber, thereby achieving a better cleaning effect.

[0030] Furthermore, the cross-sectional area of ​​the pressure chamber 500 is larger than the cross-sectional area of ​​the sleeve mouth 501, and a guide section 502 is provided between the pressure chamber 500 and the sleeve mouth 501, so that the connection between the pressure chamber 500 and the sleeve mouth 501 has a smooth transition. In some embodiments, the cross-sectional shape of the guide section 502 can be constructed as a triangle or an arc, so that the connection between the pressure chamber 500 and the sleeve mouth 501 has a linear or arc transition, which is beneficial for the liquid flow to carry impurities out of the pressure chamber 500.

[0031] Furthermore, an electric heating film 56 is provided on the outer wall of the barrel shell 51, and the electric heating film 56 is connected to an external temperature controller. The electric heating film 56 is attached to the outer side of the barrel shell 51, and the heating temperature can be controlled by the temperature controller to increase the temperature of the cleaning liquid inside the pressure chamber 500. The increase in temperature can increase the reaction speed of the solvent between the cleaning liquid and the carbon fiber filaments within a certain range, thereby improving the cleaning effect of the cleaning liquid on the carbon fiber.

[0032] In some embodiments, there is more than one boosting sleeve 50 in the washing tank 100, and the pressure in each boosting sleeve 50 is the same or different. When the pressure in the boosting sleeve 50 is different, the pressure in two adjacent boosting sleeves 50 increases or decreases step by step. Any two adjacent cylinder shells 51 are connected by guide fins 54, and the length of each guide fin 54 is the same or different.

[0033] Taking the example of setting three to five boosting sleeves 50 and the same pressure in each boosting sleeve 50, the length of the guide fins 54 between the cylinder shells 51 is also gradually increased. When the carbon fiber precursor passes through multiple boosting sleeves 50, the part entering the boosting sleeve 50 is compressed under relatively high pressure, and then relaxes after coming out of the boosting sleeve 50. In the state of loose and tight, the discharge of solvent impurities in the gaps of the fiber filaments can be promoted, and the cleaning liquid can be facilitated to enter the gaps of the fiber filaments, thereby achieving a more efficient cleaning effect.

[0034] Taking the example of setting three to five boosting sleeves 50 and increasing the pressure in each boosting sleeve 50 in a step-by-step manner, the length of the guide fins 54 between the cylinder shells 51 also increases step by step. When the carbon fiber precursor passes through multiple boosting sleeves 50, the part entering the boosting sleeve 50 is compressed under relatively high pressure, and then relaxes after coming out of the boosting sleeve 50. In the loose and tight state, the discharge of solvent impurities in the gaps of the fiber filaments can be promoted, and the cleaning liquid can be facilitated to enter the gaps of the fiber filaments, thereby achieving a more efficient cleaning effect. The step-by-step increased pressure is more conducive to the discharge of solvent impurities in the fiber filaments.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, a partition 11 is fixedly provided in the water tank 10, and the partition 11 is used to separate the water washing tank 100 into a first cleaning tank 102 and a second cleaning tank 103, the extrusion roller group 20 is located on the side of the first cleaning tank 102 close to the feed window 101, the boost sleeve 50 is located in the second cleaning tank 103, and the guide roller group 40 is used to guide the carbon fiber precursor to pass through the boost sleeve 50 and out from the discharge window 104.

[0036] In some embodiments, the volume ratio of the first cleaning tank 102 and the second cleaning tank 103 is less than 1, that is, the volume of the first cleaning tank 102 is relatively small, usually the volume of the first cleaning tank 102 is 1 / 5 of the volume of the second cleaning tank 103, and the first cleaning tank 102 and the second cleaning tank 103 are respectively provided with a first drain pipe 105 and a second drain pipe 106, and the first drain pipe 105 and the second drain pipe 106 are respectively connected to two sets of circulation systems.

[0037] The washing tank 100 is separated by a partition 11 to form a first cleaning tank 102 and a second cleaning tank 103. Since the squeezing roller group 20 is arranged in the first cleaning tank 102, the carbon fiber precursor bundle will be squeezed in advance when passing through the squeezing roller group 20, and most of the solvent impurities attached to the surface of the precursor will be squeezed out, and the carbon fiber precursors entering the second cleaning tank 103 are only the solvent impurities remaining in the gaps of the fiber bundles. Compared with the second cleaning tank 103, the first cleaning tank 102 contains relatively more solvent impurities, so two cleaning tanks are separated, and the cleaning liquid in the first cleaning tank 102 with a high solvent content and the cleaning liquid in the second cleaning tank 103 with a low solvent content are filtered and recycled separately, which can reduce the difficulty of filtering the cleaning liquid in the second cleaning tank 103 and make the cleaning liquid in the second cleaning tank 103 easier to be recycled.

[0038] like Figure 3 As shown, the squeezing roller group 20 includes a pair of water-pressing rollers in contact with each other, the water-pressing roller includes a roller core 21 and a roller cover 22, the roller cover 22 is fixedly sleeved on the outer side of the roller core 21, and the roller cover 22 includes an elastic cover, and the two roller covers 22 have elastic pre-pressure when they are in contact with each other, which is used to apply pressure to the carbon fiber precursor passing through the squeezing roller group 20.

[0039] In some embodiments, the roller core 21 can be a hard core made of stainless steel or plastic resin, and the roller cover 22 can be an elastic cover made of rubber, silicone rubber, etc., so that when the roller cover 22 contacts the carbon fiber bundle, it can elastically squeeze toward the surface of the carbon fiber and squeeze out the solvent on the surface of the fiber bundle.

[0040] Furthermore, the extrusion roller group 20 is arranged horizontally in the first cleaning tank 102, and the carbon fiber precursor passes through the extrusion roller group 20 in the vertical direction. A flushing nozzle 30 is provided under the extrusion roller group 20, and the flushing nozzle 30 is configured to spray cleaning liquid to the contact area of ​​the extrusion roller group 20. In this way, the flushing nozzle 30 can flush out the squeezed solvent impurities, thereby reducing the solvent impurities contained in the carbon fiber filaments entering the second cleaning tank 103, which is beneficial to subsequent further cleaning.

[0041] In some embodiments, the flushing nozzle 30 includes a liquid supply pipe 32 fixed inside the water tank 10 and a nozzle 31 installed on the liquid supply pipe 32. The input end of the liquid supply pipe 32 is connected to the liquid supply device, and the nozzle 31 is arranged at the output end of the liquid supply pipe 32, and can spray cleaning liquid onto the extrusion roller group 20 and / or the surface of the carbon fiber precursor. Multiple nozzles 31 can be arranged on each liquid supply pipe 32, and multiple installation angles of the nozzle 31 can be set, so that the cleaning liquid sprayed by the nozzle 31 has a larger coverage range, so that the sprayed cleaning liquid can effectively cover the area to be flushed, and is not concentrated on the carbon fiber precursor, thereby reducing the impact damage to the carbon fiber precursor.

[0042] like Figure 1 and Figure 2 As shown, the device includes a plurality of water tanks 10 stacked in the height direction, the feed windows 101 and the first cleaning tank 102 in the water tanks 10 are staggered in the height direction, and a guide plate window 12 for the entry / exit of carbon fiber precursor is provided on the top of the water tank 10, so that the carbon fiber precursor is transported in a serpentine path in the plurality of water tanks 10, and the pressure of the extrusion roller group 20 in the plurality of water tanks 10 on the carbon fiber precursor bundle is gradually increased.

[0043] In this way, by setting up multiple groups of longitudinally distributed water tanks 10, the occupied ground space can be reduced, and the pressure of the extrusion roller group 20 in the water tank 10 on the carbon fiber precursor bundle is gradually increased, and the solvent extrusion between the carbon fiber precursors is promoted by repeated rolling. After the carbon fiber precursors are washed by the first cleaning tank 102 for many times, combined with the booster sleeve 50 set in the first cleaning tank 102, the cleaning effect can be effectively improved, so as to improve the cleaning efficiency without damaging the carbon fiber precursors.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The above description of the implementation mode is not restrictive, and the drawings show only one of the implementation modes, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the scope of protection.

Claims

1. A carbon fiber washing device, characterized in that: include: A water tank (10), the water tank (10) comprising a water washing tank (100) and a feed window (101) and a discharge window (104) for feeding and discharging carbon fiber precursors; An extrusion roller group (20) is arranged in the water tank (10) and is capable of extruding the carbon fiber precursor tow; A guide roller group (40) is arranged in the water tank (10) and is used to guide the carbon fiber precursor; A pressurizing sleeve (50) is provided in the water washing tank (100), and the pressurizing sleeve (50) is connected to an external liquid supply device. Both ends of the pressurizing sleeve (50) have sleeve openings (501) for the carbon fiber precursor to pass through and for the cleaning liquid to be discharged. The water pressure in the pressurizing sleeve (50) is higher than the water pressure in the water washing tank (100), so that the carbon fiber precursor is washed in the water tank (10) at more than two pressures.

2. The carbon fiber washing device according to claim 1, characterized in that: The booster sleeve (50) comprises a sleeve shell (51) and a liquid supply support tube (55) arranged on the side wall of the sleeve shell (51); the interior of the sleeve shell (51) comprises a pressure chamber (500), and both ends of the sleeve shell (51) comprise sleeve openings (501) communicating with the pressure chamber (500); one end of the liquid supply support tube (55) is communicated with the pressure chamber (500), and the other end is connected to the liquid supply device; A guide fin (54) is fixedly connected to the end of the barrel shell (51), and the guide fin (54) is configured to guide the cleaning liquid discharged from the sleeve opening (501) to the surface of the carbon fiber precursor, and the guide fin (54) guides the cleaning liquid in a direction parallel to or inclined to the axial direction of the carbon fiber precursor.

3. The carbon fiber washing device according to claim 2, characterized in that: A liquid distribution ring (52) is fixedly provided on the outer side of the barrel shell (51); a flow equalizing plate (53) is provided on the inner side of the barrel shell (51) corresponding to the liquid distribution ring (52); a liquid distribution cavity (521) is provided between the liquid distribution ring (52) and the flow equalizing plate (53); a surface of the flow equalizing plate (53) is provided with a plurality of evenly distributed flow guide holes (531); the flow guide holes (531) are connected to the liquid distribution cavity (521) and the pressure cavity (500); the liquid supply support pipe (55) is fixed on the outer wall of the liquid distribution ring (52) and is connected to the liquid distribution cavity (521); a plurality of evenly distributed axial flow guide plates (511) are provided on the inner side wall of the barrel shell (51); the axial flow guide plates (511) are configured to guide the cleaning liquid flowing out of the flow guide holes (531) vertically toward the surface of the carbon fiber precursor.

4. The carbon fiber washing device according to claim 2, characterized in that: The cross-sectional area of ​​the pressure chamber (500) is larger than the cross-sectional area of ​​the sleeve opening (501); a flow guide section (502) is provided between the pressure chamber (500) and the sleeve opening (501) so that a connection between the pressure chamber (500) and the sleeve opening (501) has a smooth transition; an electric heating film (56) is provided on the outer wall of the cartridge shell (51); the electric heating film (56) is connected to an external temperature controller.

5. The carbon fiber washing device according to any one of claims 2 to 4, characterized in that: The water washing tank (100) is provided with more than one boosting sleeve (50), the pressure in each boosting sleeve (50) is the same or different, and when the pressure in the boosting sleeve (50) is different, the pressure in two adjacent boosting sleeves (50) increases or decreases in a stepwise manner, and any two adjacent cylinder shells (51) are connected via the guide fins (54), and the length of each guide fin (54) is the same or different.

6. The carbon fiber washing device according to any one of claims 1 to 4, characterized in that: A partition (11) is fixedly provided in the water tank (10), and the partition (11) is used to separate the water washing tank (100) into a first cleaning tank (102) and a second cleaning tank (103); the squeezing roller group (20) is located in the first cleaning tank (102) on a side close to the feed window (101); the boosting sleeve (50) is located in the second cleaning tank (103); and the guide roller group (40) is used to guide the carbon fiber precursor to pass through the boosting sleeve (50) and pass out from the discharge window (104); The volume ratio of the first cleaning tank (102) to the second cleaning tank (103) is less than 1, and a first liquid drain pipe (105) and a second liquid drain pipe (106) are respectively provided in the first cleaning tank (102) and the second cleaning tank (103), and the first liquid drain pipe (105) and the second liquid drain pipe (106) are respectively connected to two sets of circulation systems.

7. The carbon fiber washing device according to claim 6, characterized in that: The squeezing roller group (20) comprises a pair of water-pressing rollers in contact with each other, the water-pressing rollers comprising a roller core (21) and a roller sleeve (22), the roller sleeve (22) being fixedly sleeved on the outside of the roller core (21), and the roller sleeve (22) comprising an elastic sleeve, and the two roller sleeves (22) have elastic pre-pressure when in contact with each other, so as to apply pressure to the carbon fiber precursors passing through the squeezing roller group (20).

8. The carbon fiber washing device according to claim 7, characterized in that: The squeezing roller group (20) is arranged in a horizontal direction in the first cleaning tank (102), and the carbon fiber precursor passes through the squeezing roller group (20) in a vertical direction. A flushing nozzle (30) is provided below the squeezing roller group (20), and the flushing nozzle (30) is configured to spray a cleaning liquid toward a contact area of ​​the squeezing roller group (20).

9. The carbon fiber washing device according to claim 8, characterized in that: The flushing nozzle (30) comprises a liquid supply pipe (32) fixed inside the water tank (10) and a nozzle (31) mounted on the liquid supply pipe (32); the input end of the liquid supply pipe (32) is connected to the liquid supply device; the nozzle (31) is arranged at the output end of the liquid supply pipe (32) and can spray cleaning liquid onto the surface of the squeezing roller group (20) and / or the carbon fiber precursor.

10. The carbon fiber washing device according to claim 6, characterized in that: The invention comprises a plurality of water tanks (10) stacked in a height direction, wherein the feed windows (101) and the first cleaning tanks (102) in the water tanks (10) are staggered in the height direction, and a guide plate window (12) for the carbon fiber precursor to enter / exit is provided on the top of the water tank (10), so that the carbon fiber precursor is transported in a serpentine path in the plurality of water tanks (10), and the pressure of the squeezing roller groups (20) in the plurality of water tanks (10) on the carbon fiber precursor is gradually increased.

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