Carbon fiber precursor humidifying device and control method

Abstract

The invention discloses a carbon fiber precursor humidifying device and a control method. The carbon fiber precursor humidifying device is provided with a tow inlet and a tow outlet, and a driving roller is arranged at the position close to the tow outlet; the device further comprises a pressing roller assembly, and the pressing roller assembly is arranged above the driving roller in a liftable mode and used for pressing a carbon fiber precursor bundle. And the control unit is used for receiving a corresponding instruction to control the lifting of the compression roller assembly. The compression roller assembly is used for compressing the carbon fiber precursor filament bundles, and the phenomenon that when filament breakage occurs in the pre-oxidation furnace, broken filaments are drawn back due to the action of tension, adjacent filament bundles are affected, and the phenomenon of roller winding is generated can be effectively prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon fiber precursor, and in particular relates to a carbon fiber precursor humidifying device and a control method. Background Art

[0002] Carbon fiber is known as "industrial gold" and the "king of new materials". It has the characteristics of high strength, high modulus, corrosion resistance, fatigue resistance, and high temperature resistance. It is an indispensable and important strategic material in aerospace, national defense and military industry, transportation, new energy, marine engineering and other fields.

[0003] With the continuous improvement of industrial level, the domestic material field has achieved great development. It has been more than 100 years since carbon fiber was invented, but my country has only been researching carbon fiber materials for a few decades. During these decades, we have successfully broken through the foreign blockade with our wisdom and completed the domestic carbon fiber industry chain.

[0004] The carbon fiber production line consists of many production process links: the raw silk (polyacrylonitrile) fiber goes through processes such as unwinding, pre-oxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, gluing, drying, and winding, and finally produces shafted fiber silk.

[0005] In the existing carbon fiber production process, the raw silk will produce friction with the various guide rollers of the unwinding machine and the various guide rollers of the pre-oxidation furnace when passing through the unwinding and pre-oxidation processes, and the hot circulating air in the pre-oxidation furnace will also produce friction with the filament bundles. These frictions will generate a large amount of static electricity. The generation of static electricity will cause the charges on the filament bundles to repel each other, causing the filament bundles to become fuzzy and easily entangled with the rollers, affecting the quality of the yarn; and because the filament bundles are easy to entangle with the rollers, the operator needs to deal with the abnormal working conditions in time, which affects the stability and continuity of the subsequent process links, wastes manpower and material resources, and increases production costs.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a carbon fiber precursor humidification device and a control method. The humidification device is provided with a liftable pressure roller assembly to achieve the compression of the carbon fiber precursor bundles, prevent broken wires from being pulled back, avoid broken wires from affecting adjacent bundles, and facilitate the handling of broken wires.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A first aspect of the present invention provides a carbon fiber precursor humidifying device, wherein the carbon fiber precursor humidifying device is provided with a bundle inlet and a bundle outlet, and a driving roller is provided near the bundle outlet.

[0010] Furthermore, the carbon fiber humidifying device comprises: a pressure roller assembly, which is arranged above the driving roller in a liftable manner and is used to compress the carbon fiber precursor tow.

[0011] Advantageously, a pressing roller assembly is provided to compress the carbon fiber precursor tow, which can effectively prevent the withdrawal of broken filaments, avoid the influence of broken filaments on adjacent tows, and facilitate the handling of broken filaments.

[0012] Furthermore, the carbon fiber precursor humidifying device also includes a control unit, and the control unit receives corresponding instructions to control the lifting and lowering of the pressure roller assembly.

[0013] Advantageously, the pressure roller assembly can be lowered when needed through the control of the control unit to achieve compression of the raw silk bundle.

[0014] Furthermore, the pressure roller assembly includes: a roller and a pneumatic booster arm, the pneumatic booster arm is connected to the top wall of the carbon fiber precursor humidification device, and the control unit controls the extension and retraction of the pneumatic booster arm to achieve the lifting and lowering of the roller.

[0015] Advantageously, the lifting and lowering of the roller can be achieved by extending and retracting the pneumatic booster arm, which can ensure that the roller can be lifted and lowered smoothly and avoid the occurrence of sudden drops.

[0016] Furthermore, the control unit is communicatively connected to the pneumatic power-assisting arm.

[0017] Furthermore, the pneumatic booster arm is provided with an air inlet, which is connected to a gas input pipeline and is used to introduce compressed air into the pneumatic booster arm.

[0018] Advantageously, compressed air enters the pneumatic booster arm through the air inlet, which can change the pressure inside the pneumatic booster arm and achieve the extension and retraction of the pneumatic booster arm.

[0019] Furthermore, the pressure roller assembly also includes: a suspension arm, which is rotatably connected to the side wall of the carbon fiber humidifying device, and the roller swings around the connection between the suspension arm and the side wall under the drive of the pneumatic booster arm.

[0020] Advantageously, the arrangement of the suspension arm can ensure that the roller moves on a set trajectory, and prevent changes in the trajectory of the roller from affecting the working effect of the pressure roller assembly.

[0021] Furthermore, a mounting hole is provided at the end of the pneumatic assist arm, and a mounting shaft is provided at the suspension arm. The mounting shaft is installed in the mounting hole to achieve a rotatable connection between the pneumatic assist arm and the suspension arm.

[0022] Advantageously, the pneumatic assist arm is rotatably connected to the suspension arm, which can ensure that the roller moves along a set route during its descent.

[0023] Furthermore, roller shafts are provided at both ends of the roller, and the roller is connected to the suspension arm via the roller shafts.

[0024] Advantageously, both ends of the roller are connected with suspension arms, which can ensure that the roller remains balanced during the lifting process and avoid tilting to one side.

[0025] A second aspect of the present invention provides a control method for a carbon fiber precursor humidification device, comprising: a control unit receives an instruction for descending a pressure roller assembly, and controls the roller to descend from a suspended position.

[0026] Optionally, after receiving the instruction for the pressure roller assembly to descend, the control unit controls the increase of the pressure in the pneumatic booster arm to extend the pneumatic booster arm.

[0027] Optionally, after receiving the instruction for lowering the pressure roller assembly, the control unit controls the gas input pipeline to input compressed air into the pneumatic power-assisting arm.

[0028] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0029] 1. The present invention provides a pressing roller assembly on the carbon fiber precursor humidifying device for pressing the carbon fiber precursor bundles, which can effectively prevent the broken wires from being pulled back due to the tension when broken wires appear in the pre-oxidation furnace, thereby affecting the adjacent bundles and causing the roller entanglement phenomenon.

[0030] 2. The carbon fiber precursor humidifying device of the present invention is also provided with a control unit, through which the pressure roller assembly can be raised and lowered to achieve the pressure roller assembly descending to the pressing position when needed.

[0031] 3. The pressure roller assembly of the present invention includes: a pneumatic booster arm and a roller, and the pneumatic booster arm is controlled by a control unit to realize the lifting and lowering of the roller, which can ensure that the roller moves along a set trajectory.

[0032] 4. The pressure roller assembly of the present invention also includes: a suspension arm, which cooperates with the pneumatic power-assisting arm to further ensure that the roller moves along the set trajectory, and increases the stability and balance of the roller during the lifting process, preventing the roller from descending too quickly and causing damage to the drive roller in the carbon fiber precursor humidification device.

[0033] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0035] Figure 1 The carbon fiber precursor humidification device of the present invention is schematically shown in FIG. Figure 1 ;

[0036] Figure 2 The carbon fiber precursor humidification device of the present invention is schematically shown in FIG. Figure 2 ;

[0037] Figure 3 Schematic diagram of the assembly of the various components of the pressure roller assembly of the present invention Figure 1 ;

[0038] Figure 4 Schematic diagram of the assembly of the various components of the pressure roller assembly of the present invention Figure 2 ;

[0039] Figure 5 It is a schematic diagram of the float structure of the present invention;

[0040] Figure 6 It is a cross-sectional view of the floating structure of the present invention.

[0041] In the figure: 100, carbon fiber precursor humidification device; 101, top wall; 102, side wall; 103, drive roller; 104, workbench; 105, emergency stop button; 110, pressure roller assembly; 111, pneumatic power arm; 1111, mounting hole; 112, suspension arm; 1121, mounting shaft; 1132, mounting groove; 113, roller; 120, float; 130, glass door; 121, float valve; 122, float; 123, float rod; 1211, seal.

[0042] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0044] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] like Figure 1 to Figure 2 As shown, the present invention provides a carbon fiber precursor humidifying device 100, which is provided with a bundle inlet and a bundle outlet; it is also provided with a water immersion tank and a traction mechanism, which is fixed inside the humidifying device and is used to traction and guide the precursor bundle, wherein the traction mechanism drives the precursor bundle to enter the humidifying device from the bundle inlet, so that the precursor bundle is immersed in the water immersion tank, and finally leaves the humidifying device from the bundle outlet.

[0047] In this embodiment, the immersion tank is first filled with water, and the raw silk bundle enters the humidification device from the bundle entrance through the traction force of the traction mechanism. The raw silk bundle entering the humidification device is guided by the traction mechanism and washed in the immersion tank, so that the static ions on the raw silk are neutralized and the static electricity of the raw silk is eliminated. Finally, the raw silk bundle goes out from the bundle outlet of the humidification device. The raw silk bundle passes through the immersion tank, which weakens the static charge of the raw silk, avoids the occurrence of roller winding, reduces production costs, and improves the quality of carbon fiber products.

[0048] Furthermore, the traction mechanism includes a driving roller 103 and a plurality of driven rollers, and the driven rollers and the driving rollers 103 are arranged in sequence from the inlet of the filament bundle to the outlet of the filament bundle, and the driving roller 103 is located near the outlet of the filament bundle of the humidifying device. In this embodiment, taking one driving roller 103 and three driven rollers as an example, the axes of the driving roller 103 and the driven rollers are arranged parallel to each other, and the two driven rollers in the middle are lower than the driving rollers 103 and the driven rollers at both ends, and the lowest position is immersed in the immersion tank. In order to ensure that the raw silk bundle can be immersed in the immersion tank, a section of the raw silk bundle between the two driven rollers is in a horizontal state.

[0049] In this embodiment, a workbench 104 is arranged between the two driven rollers in the middle. When the yarn bundle is entangled with the roller or the yarn is broken, the yarn is filamentary, or the yarn is damaged, the staff can go up to the workbench 104 to deal with the abnormal situation in the humidification device, thereby improving the work efficiency of solving the abnormal situation.

[0050] In this embodiment, glass doors 130 are installed at both ends of the humidification device. The staff can directly observe the working conditions inside the humidification device through the glass doors 130. After opening the glass doors 130, they can directly go up to the workbench 104 to deal with any abnormal conditions in a timely manner, thereby reducing the risk of performing abnormal handling operations from the roller side door.

[0051] In this embodiment, emergency stop buttons 105 are provided at the bundle outlet and bundle inlet of the carbon fiber precursor humidification device 100. During operation, the staff observes abnormal conditions in the carbon fiber precursor humidification device 100 through the glass doors 130 provided at both ends. The emergency stop button 105 can be used to stop the operation of the carbon fiber precursor humidification device 100, and then the glass door 130 can be opened to go to the workbench 104 to deal with the abnormal conditions.

[0052] Furthermore, the carbon fiber precursor humidifying device 100 further includes: a pressure roller assembly 110, which is arranged above the driving roller 103 in a liftable manner and is used to compress the carbon fiber precursor tow.

[0053] Specifically, the pressure roller assembly 110 can be raised and lowered and is located above the driving roller 103, more specifically, is located obliquely above the driving roller 103. When the pressure roller assembly 110 needs to be lowered, the pressure roller assembly 110 slowly descends to the driving roller 103 to compress the raw silk bundle to prevent broken silk from being pulled back and affecting other adjacent bundles.

[0054] Furthermore, the carbon fiber precursor humidifying device 100 also includes a control unit, and the control unit receives corresponding instructions to control the lifting and lowering of the pressure roller assembly 110.

[0055] Specifically, when the control unit receives an instruction to lower the pressure roller assembly 110 , it controls the pressure roller assembly 110 to lower; when the control unit receives an instruction to raise the pressure roller assembly 110 , it controls the pressure roller assembly 110 to raise.

[0056] Furthermore, the pressure roller assembly 110 includes: a roller 113 and a pneumatic booster arm 111, the pneumatic booster arm 111 is connected to the top wall 101 of the carbon fiber precursor humidification device 100, and the control unit controls the extension and retraction of the pneumatic booster arm 111 to achieve the lifting and lowering of the roller 113.

[0057] Furthermore, the control unit is communicatively connected to the pneumatic booster arm 111 .

[0058] Specifically, when the control unit receives an instruction to lower the pressure roller assembly 110, it sends a signal to the pneumatic booster arm 111. After receiving the signal, the pneumatic booster arm 111 extends, thereby lowering the roller 113; when the control unit receives an instruction to raise the pressure roller assembly 110, it sends a signal to the pneumatic booster arm 111. After receiving the signal, the pneumatic booster arm 111 contracts, thereby raising the roller 113.

[0059] Furthermore, the pneumatic booster arm 111 is provided with an air inlet, and the air inlet is connected to a gas input pipeline for introducing compressed air into the pneumatic booster arm 111 .

[0060] Specifically, an air inlet is provided on the pneumatic booster arm 111, and the air inlet is connected to a compressed air input pipeline. When compressed air needs to be introduced into the pneumatic booster arm 111, the compressed air reaches the air inlet through the air input pipeline, and then enters the pneumatic booster arm 111 through the air inlet.

[0061] Furthermore, the pressure roller assembly 110 also includes a suspension arm 112, which is rotatably connected to the side wall 102 of the carbon fiber precursor humidification device 100, and the roller 113 swings around the connection between the suspension arm 112 and the side wall 102 under the drive of the pneumatic booster arm 111.

[0062] Specifically, the axis of the roller 113 of the pressure roller assembly 110 is arranged in the same direction as the axis of the driving roller 103, ensuring that the pressure roller assembly 110 can cooperate with the driving roller 103 to compact the precursor tow after being lowered. When it is necessary to lower the roller 113 to compact the carbon fiber precursor tow, the control lever of the pressure roller assembly 110 is turned to the pressure roller gear position, and the control unit controls the pneumatic booster arm 111 to extend and push the roller 113 down. Under the thrust of the pneumatic booster arm 111, the roller 113 swings around the connection between the suspension arm 112 and the side wall 102 and moves along the set trajectory. Under the action of the pneumatic booster arm 111 and the suspension arm 112, the roller 113 slowly descends to the driving position. At roller 103, the raw silk bundle is compressed to prevent broken silk from being pulled back; when it is necessary to lift roller 113, the control lever of pressure roller assembly 110 is turned to the hovering gear, and the control unit controls the contraction of pneumatic assisting arm 111 to drive roller 113 to rise. Driven by the contraction force of pneumatic assisting arm 111, roller 113 swings around the connection between suspension arm 112 and side wall 102. Under the action of pneumatic assisting arm 111 and suspension arm 112, roller 113 rises to the specified position.

[0063] Furthermore, a mounting hole 1111 is provided at the end of the pneumatic assist arm 111 , and a mounting shaft 1121 is provided at the suspension arm 112 . The mounting shaft 1121 is installed in the mounting hole 1111 , so as to realize a rotatable connection between the pneumatic assist arm 111 and the suspension arm 112 .

[0064] Specifically, Figure 3 As described, a mounting hole 1111 is provided at one end where the pneumatic booster arm 111 is connected to the suspension arm 112, that is, the mounting hole 1111 is provided on the extension rod of the pneumatic booster arm 111; a mounting groove 1122 is provided on the suspension arm, and a first through hole and a second through hole are provided on the two opposite side walls of the mounting groove, and the mounting shaft passes through the first through hole, the mounting hole of the pneumatic booster arm, and the second through hole in sequence, so as to realize the rotatable connection between the pneumatic booster arm and the suspension arm. In this embodiment, the mounting shaft 1131 is a nut.

[0065] Furthermore, roller shafts are provided at both ends of the roller 113 , and the roller 113 is connected to the suspension arm 112 via the roller shafts.

[0066] Specifically, roller shafts are provided at both ends of the roller 113, and the suspension arms 112 are connected to the roller shafts, that is, the suspension arms 112 are provided at both ends of the roller 113 to ensure the stability of the roller 113 during the lifting process and prevent it from tilting to one side.

[0067] More specifically, a mounting groove is provided on each suspension arm, and the positions of the mounting grooves correspond to each other, so the two pneumatic assist arms correspond to the suspension arms one by one, further ensuring the stability of the roller during the lifting process and preventing it from tilting to one side.

[0068] In the embodiment of the present invention, the carbon fiber precursor humidifying device 100 is further provided with a float 120 , and the float 120 is located in the immersion tank below the driving roller 103 .

[0069] Furthermore, the float 120 includes: a float valve 121 , a float rod 123 and a float 122 , and the float valve 121 and the float 122 are connected via the float rod 123 .

[0070] Furthermore, the float valve 121 is provided with a water inlet and a water outlet. When the water level in the immersion tank drops to a first preset value, the float valve 121 opens to supply water to the immersion tank.

[0071] Furthermore, when the water level in the immersion tank rises to a second preset value, the float valve 121 is closed to stop supplying water to the immersion tank.

[0072] Furthermore, a sealing member 1211 is provided in the float valve 121 , and the water inlet of the float valve 121 is opened and closed by opening and closing the sealing member 1211 .

[0073] Specifically, Figure 4 and Figure 5 As shown, the float 120 includes a float valve 121, a float rod 123 and a float 122, and the float valve 121 and the float 122 are connected by the float rod 123. The float valve 121 is provided with a water inlet and a water outlet, the water inlet is connected to the water inlet pipeline, and is used to supply water to the float valve 121, and the water outlet is located on the side of the float valve 121 facing the immersion tank, and is used to guide the water in the float valve 121 into the immersion tank.

[0074] In this embodiment, as the carbon fiber precursor humidification device 100 works, the water level in the immersion tank will drop. When the water level drops to a first preset value, the float rod 123 drops along with the float 122. At this time, the float valve 121 opens under the action of the incoming water pressure to allow water to flow into the immersion tank. When the water level rises to a second preset value, the float valve 121 closes to stop supplying water to the immersion tank.

[0075] More specifically, a seal 1211 is provided inside the float valve 121. The seal 1211 includes a valve core silicone and a lever. One end of the lever facing the float rod 123 overlaps the end of the float rod 123. When the water level drops to a first preset value, the float rod 123 drops along with the float 122. At this time, the driving force of the float rod 123 on the lever disappears, and the seal 1211 opens under the action of the water pressure of the incoming water, so that water can flow into the immersion tank. When the water level rises to a second preset value, the float rod 123 pushes the lever to rise, and finally the valve core silicone blocks the water inlet, and the float valve 121 is closed, stopping the water supply to the immersion tank.

[0076] In the implementation process of the embodiment of the present invention, the immersion tank is first filled with water, and the precursor fiber bundle enters the carbon fiber precursor humidifying device 100 from the bundle inlet under the traction force of the driving roller 103 and the driven roller. The fiber bundle entering the carbon fiber precursor humidifying device 100 is immersed in the immersion tank under the guidance of the driving roller 103 and the driven roller. After the fiber bundle is washed by the liquid in the immersion tank, the electrostatic ions on the fiber bundle are neutralized and the static electricity of the fiber bundle is eliminated. Finally, the fiber bundle follows the traction force of the driving roller 103 and goes out from the bundle outlet of the carbon fiber precursor humidifying device 100.

[0077] During the implementation of this embodiment, when the carbon fiber precursor humidifying device 100 is working, the pressure roller assembly 110 is suspended at a set position, and the roller 113 is suspended at a set position through the cooperation of the pneumatic booster arm 111 and the suspension arm 112. The water in the immersion tank will decrease as the carbon fiber precursor humidifying device 100 works. When the water level drops to a certain position, the water pressure in the water inlet pipeline will open the float valve 121 of the float 120 to let water flow into the immersion tank; when the water in the immersion tank rises to a preset position, the float valve 121 of the float 120 is closed to stop the water flow into the immersion tank.

[0078] A second aspect of the present invention provides a method for controlling a carbon fiber precursor humidifying device 100, comprising: a control unit receives an instruction for descending a pressure roller assembly, and controls the roller to descend from a suspended position.

[0079] Optionally, after receiving the instruction for the pressure roller assembly to descend, the control unit controls the pressure in the pneumatic booster arm to increase so as to extend the pneumatic booster arm.

[0080] Optionally, after receiving the instruction for lowering the pressure roller assembly, the control unit controls the gas input pipeline to input compressed air into the pneumatic booster arm.

[0081] In this embodiment, after the control unit receives the command to descend the pressure roller assembly 110, it controls the gas input pipeline to input compressed air into the pneumatic booster arm 111 to change the air pressure in the pneumatic booster arm 111. The piston in the cylinder drives the arm rod to extend, pushing the roller 113 to move along the set trajectory. At the same time, the suspension arm 112 rotates around the connection with the carbon fiber precursor humidification device 100, so that the roller 113 moves along the set trajectory with the cooperation of the pneumatic booster arm 111 and the suspension arm 112, and finally reaches a position tangent to the drive roller 103, thereby realizing the compression of the carbon fiber precursor bundle.

[0082] In another embodiment of the present invention, after the control unit receives the command for the pressure roller assembly 110 to rise, it controls the pressure in the pneumatic assist arm 111 to change, and the piston in the cylinder drives the arm rod to contract, thereby driving the roller 113 to rise. At the same time, the suspension arm 112 rotates around the connection with the carbon fiber precursor humidification device 100, so that the roller 113 moves along the set trajectory under the cooperation of the pneumatic assist arm 111 and the suspension arm 112, leaves the tangent position with the drive roller 103, and returns to the set suspension position.

[0083] The pressure roller assembly 110 is provided to compress the filament bundles in the carbon fiber precursor humidifying device 100 to prevent the precursors in the pre-oxidation furnace from breaking and being drawn back into the humidifying device due to tension, thereby affecting adjacent filament bundles and causing roller entanglement.

[0084] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A carbon fiber precursor humidifying device, provided with a tow inlet and a tow outlet, and a driving roller is provided near the tow outlet; It is characterized in that include: A pressing roller assembly, which is arranged above the driving roller in a liftable manner and is used to press the carbon fiber precursor tow; A control unit receives corresponding instructions to control the lifting and lowering of the pressure roller assembly.

2. The carbon fiber precursor humidifying device according to claim 1, It is characterized in that The pressure roller assembly includes: a roller and a pneumatic booster arm, the pneumatic booster arm is connected to the top wall of the carbon fiber precursor humidifying device, and the control unit controls the extension and retraction of the pneumatic booster arm to realize the lifting and lowering of the roller.

3. The carbon fiber precursor humidifying device according to claim 2, It is characterized in that The control unit is in communication connection with the pneumatic booster arm.

4. The carbon fiber precursor humidifying device according to claim 3, It is characterized in that The pneumatic booster arm is provided with an air inlet, which is connected to a gas input pipeline and is used to introduce compressed air into the pneumatic booster arm.

5. The carbon fiber precursor humidifying device according to claim 2, It is characterized in that The pressing roller assembly also includes a suspension arm, which is rotatably connected to the side wall of the carbon fiber humidifying device, and the roller swings around the connection between the suspension arm and the side wall under the drive of the pneumatic booster arm.

6. The carbon fiber precursor humidifying device according to claim 5, It is characterized in that The end of the pneumatic booster arm is provided with a mounting hole, and the suspension arm is provided with a mounting shaft, and the mounting shaft passes through the mounting hole to realize the rotatable connection between the pneumatic booster arm and the suspension arm.

7. The carbon fiber precursor humidifying device according to claim 6, It is characterized in that Roller shafts are provided at both ends of the roller, and the roller is connected to the suspension arm through the roller shafts.

8. A method for controlling the carbon fiber precursor humidification device according to any one of claims 1 to 7, It is characterized in that include: The control unit receives an instruction to lower the pressure roller assembly and controls the roller to lower from the suspended position.

9. The control method of the carbon fiber precursor humidification device according to claim 8, It is characterized in that After receiving the instruction for the pressure roller assembly to descend, the control unit controls the increase of the pressure in the pneumatic booster arm to extend the pneumatic booster arm.

10. The control method of the carbon fiber precursor humidification device according to claim 9, It is characterized in that After receiving the instruction for the pressure roller assembly to descend, the control unit controls the gas input pipeline to input compressed air into the pneumatic booster arm.

Images