Carbon fiber precursor drying device
By setting up a fiber-opening device and an oil-collecting device between the drying rollers, the problems of uneven oiling of carbon fiber precursors, which caused fiber bundling and fuzzing, were solved, thus improving the quality of the precursors and the drying effect.
Patent Information
- Application Number
- CN202422464590.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-10-12
AI Technical Summary
During the densification process of carbon fiber precursor, uneven oiling of some single filaments leads to yarn doubling, hairy yarns and hair balls, which affects the fiber quality and reduces the quality of the final carbon fiber precursor.
A fiber-opening device, including a frequency-modulated vibration device and a compressed air treatment device, is installed between the drying rollers. The fiber bundles are separated by high-speed drying compressed air, and the squeezed oil is collected by an oil collection device to avoid affecting the temperature and humidity inside the drying chamber.
It reduces the generation of filaments and clumps, improves the quality of raw yarn, and ensures the effectiveness of the drying process and the densification effect of the fiber.
Smart Images
Figure CN223460759U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to carbon fiber preparation equipment technical field, specifically about a carbon fiber precursor drying device. BACKGROUND
[0002] High-strength high-modulus carbon fiber is a kind of high-performance carbon fiber with tensile strength above 3.5GPa and tensile modulus above 350GPa, and it plays an important role in improving national military strength and industrial product competitiveness due to its excellent performance.
[0003] In order to obtain the above-mentioned excellent performance of the final carbon fiber, the precursor with less defects and better performance is required during preparation. Drying densification is an important link in the production process of high-strength high-modulus carbon fiber precursor, which is set after the oiling process. It mainly dehydrates and closes the pores of the swollen and porous precursor after oiling through multiple heating methods such as drying of heat roller, so as to achieve the effect of densification, which is an important and indispensable process to improve the mechanical properties of the fiber.
[0004] Due to the influence of the current oiling method, oil agent characteristics and the number of tows (generally above 12k), in actual production, some single filaments inevitably have uneven oiling, such as high surface oil content, which is prone to thermal melting under heat during the densification process, resulting in fiber doubling. Doubling and adhesion can easily cause surface defects of the fiber, seriously affecting the densification effect, and ultimately leading to the generation of tow hair and hair balls, reducing the quality of the precursor, and thus affecting the quality of the final carbon fiber precursor.
[0005] The information disclosed in this background section is intended only to increase an understanding of the general background of the application, and is not admitted to be prior art against the application. SUMMARY
[0006] The utility model aims at providing a carbon fiber precursor drying device, which can solve the technical problems raised in the above background.
[0007] In order to achieve the above-mentioned purpose, the technical scheme provided by one embodiment of the utility model is as follows:
[0008] A carbon fiber precursor drying device, comprising a drying box body, a plurality of drying roller groups are arranged in the drying box body, and an opening device is arranged between adjacent drying roller groups.
[0009] In one or more embodiments of the utility model, a yarn guide roller is installed at one end of the drying box body, and a yarn guide roller is installed at the end of the drying box body away from the yarn guide roller.
[0010] In one or more embodiments of the present application, the drying box comprises a frequency modulation vibration device and a compressed air treatment device, the frequency modulation vibration device is in direct contact with the original wire, and the compressed air treatment device generates dry compressed air and blows to the original wire to separate the original wire.
[0011] In one or more embodiments of the present application, a through hole is formed in the drying box, and an oil collecting device matched with the through hole is slidably connected to the drying box.
[0012] In one or more embodiments of the present application, a sliding groove is formed in the bottom wall of the drying box, and the oil collecting device comprises an oil collecting drawer, and a positioning block matched with the sliding groove is fixedly connected to the bottom of the oil collecting drawer.
[0013] In one or more embodiments of the present application, a first inclined plate and a second inclined plate are fixedly connected to the oil collecting drawer, and an oil storage cavity is formed between the second inclined plate and the oil collecting drawer.
[0014] In one or more embodiments of the present application, the bottom wall of the oil collecting drawer is an inclined bottom wall.
[0015] In one or more embodiments of the present application, an oil discharge pipe matched with the inclined bottom wall is installed on the oil collecting drawer.
[0016] In one or more embodiments of the present application, an observation window is formed in the oil collecting drawer, and a scale line is arranged on one side of the oil collecting drawer.
[0017] In one or more embodiments of the present application, an observation window is formed in the oil collecting drawer, and a scale line is arranged on one side of the oil collecting drawer.
[0018] Compared with the prior art, the carbon fiber original wire drying device of the present application avoids the generation of hair and hair balls of the wire bundle as much as possible, avoids the decrease of the quality of the original wire caused by the generation of hair and hair balls of the wire bundle as much as possible, and is beneficial to improving the quality of the final carbon fiber original wire. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0020] Figure 1 It is an embodiment of the present application.
[0021] Figure 2 It is the structural schematic view of the fiber opening device in the embodiment of the utility model;
[0022] Figure 3 It is the contrast table of the carbon fiber precursor obtained by using and not using the carbon fiber precursor drying device in the embodiment of the utility model;
[0023] Figure 4 It is the structural schematic view of the oil collecting device in the embodiment of the utility model;
[0024] Figure 5 It is the sectional view of the oil collecting device in the embodiment of the utility model Figure 1 .
[0025] Figure 6 It is the sectional view of the oil collecting device in the embodiment of the utility model Figure 2 .
[0026] Main figure mark explanation:
[0027] 1, the wire guide roller;2, the drying box body;201, the chute;3, the drying roller group;4, the fiber opening device;5, the guide roller;6, the frequency modulation vibration device;7, the compressed air processing device;8, the oil collecting device;9, the oil collecting drawer;901, the inclined bottom wall;902, the positioning block;10, the first inclined plate;11, the second inclined plate;12, the oil storage cavity;13, the oil discharge pipe;14, the observation window;15, the scale line;16, the handle. Specific implementation
[0028] In order to make the personnel in the technical field better understand the technical scheme in the utility model, the technical scheme in the embodiment of the utility model will be described clearly and completely in the following with the drawings in the embodiment of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor should belong to the protection scope of the utility model.
[0029] As Figures 1-3 shown, the carbon fiber precursor drying device in the embodiment of the utility model, including drying box body 2, the one end of drying box body 2 is installed with wire guide roller 1, the one end of drying box body 2 away from wire guide roller 1 is installed with guide roller 5, and multiple drying roller groups 3 are installed between wire guide roller 1 and guide roller 5, and multiple drying roller groups 3 are all located in the inside of drying box body 2. The one end of the precursor is sequentially threaded through wire guide roller 1, drying roller group 3 and guide roller 5, and the drying of the precursor is completed when the precursor is threaded through wire guide roller 1, drying roller group 3 and guide roller 5.
[0030] Among them, the filament guide roller 1, the drying roller group 3 and the guide roller 5 and other devices directly contacting the tow are treated with high-precision polishing surface treatment to prevent damage to the tow.
[0031] As shown in Figures 1-3 , an opening device 4 is installed between adjacent drying roller groups 3, which can improve the situation of fiber bundle caused by uneven oiling of part of the filaments in the densification process, reduce the generation of tow hair and hair balls, and improve the quality of the original silk.
[0032] Specifically, as shown in Figure 2 , the opening device 4 includes a frequency modulation vibration device 6 and a compressed air treatment device 7. The frequency modulation vibration device 6 and the compressed air treatment device 7 are located between adjacent drying roller groups 3, and the frequency modulation vibration device 6 is selected from high-temperature-resistant equipment and directly contacts the tow. The compressed air treatment device 7 needs to be equipped with a filtering system to obtain dry, oil-free and water-free high-speed compressed air. The compressed air treatment device 7 is arranged at one end of the tow, and the compressed air is blown at high speed to the tow to ensure that the tow is loose and separated.
[0033] By setting the opening device 4 between the adjacent drying roller groups 3, the situation of fiber bundle caused by uneven oiling of part of the filaments in the densification process is improved, the generation of tow hair and hair balls is reduced, and the quality of the original silk is improved.
[0034] As shown in Figure 3 , without setting the opening device 4, the tow enters the drying box 2 from the filament guide roller 1, and the tow is sequentially guided through the plurality of drying roller groups 3, and finally the tow is guided out through the guide roller 5. Start the drying roller group 3, and the data of the obtained original silk is comparative example 1. Set the opening device 4, the tow enters the drying box 2 from the filament guide roller 1, and the tow is sequentially guided through the plurality of drying roller groups 3 and the opening device 4, and finally the tow is guided out through the guide roller 5. Start the drying roller group 3, and the data of the obtained original silk is example 1. According to the data of the original silk of comparative example 1 and example 1, it can be seen that the number of tow hair and hair balls of the original silk with the opening device 4 is less, and the strength of the original silk is higher. From Figure 3 It can be seen that by setting the opening device 4 between each group of drying roller groups 3, the generation of tow hair and hair balls can be reduced, and the quality of the original silk can be improved.
[0035] Since the original silk is subjected to an oiling step before entering the drying box 2 through the filament guide roller 1, the original silk will be subjected to a certain extrusion when passing through the first drying roller group 3. At this time, part of the oil is extruded and directly falls on the inner bottom of the drying box 2. As the number of prepared original silk increases, the amount of oil at the inner bottom of the drying box 2 will also increase, which will greatly affect the overall humidity in the drying box 2 and also reduce the temperature in the drying box 2, affecting the drying process of the original silk and affecting the quality of the final original silk.
[0036] To solve the above problems, as shown inFigures 4-6 As shown, the drying box 2 is provided with a through hole near one side of the first drying roller group 3, and an oil collecting device 8 is slidably connected in the through hole. The oil collecting device 8 can collect the oil flowing from the first drying roller group 3, and form a separate space in the drying box 2 for storage, so as to avoid the oil vaporization caused by high temperature in the drying box 2, and avoid the oil exposure in the drying box 2 to affect the temperature in the drying box 2.
[0037] As shown in the drawings, Figures 4-6 The oil collecting device 8 includes an oil collecting drawer 9, and the lower end of the oil collecting drawer 9 is fixedly connected with a positioning block 902. The inner wall of the drying box 2 is provided with a sliding groove 201 matched with the positioning block 902, and the positioning block 902 and the sliding groove 201 are slidably connected to realize the positioning placement of the oil collecting drawer 9. When the oil collecting drawer 9 is completely located in the drying box 2, the through hole can be plugged to avoid the temperature in the drying box 2 from leaking through the through hole.
[0038] As shown in the drawings, Figures 4-6 The upper end of the oil collecting drawer 9 is provided with a first inclined plate 10 and a second inclined plate 11, and the first inclined plate 10 and the second inclined plate 11 are both inclined. The second inclined plate 11 is located at the upper end of the first inclined plate 10. When the oil falls on the second inclined plate 11, the oil on the second inclined plate 11 slides along the inclined direction of the second inclined plate 11, and finally falls on the first inclined plate 10. The oil slides along the inclined direction of the first inclined plate 10, and falls into an oil storage cavity 12 formed by the first inclined plate 10, the second inclined plate 11 and the oil collecting drawer 9. The gap between the first inclined plate 10 and the second inclined plate 11 is small, and only liquid can pass through. After the oil is located in the oil storage cavity 12, the temperature in the drying box 2 is not suitable for heat exchange with the oil in the oil storage cavity 12, so that the oil flowing from the original silk can greatly avoid affecting the environmental temperature in the drying box 2.
[0039] Preferably, the oil collecting drawer 9, the second inclined plate 11 and the first inclined plate 10 are all made of materials with poor heat conduction performance, so as to further reduce the heat exchange between the oil in the oil storage cavity 12 and the hot gas in the drying box 2.
[0040] As shown in the drawings, Figures 4-6 The bottom wall of the oil collecting drawer 9 is provided with an inclined bottom wall 901, and a oil discharging pipe 13 matched with the inclined bottom wall 901 is installed on one side of the oil collecting drawer 9. The oil discharging pipe 13 is located at the lower end of the inclined bottom wall 901. When the oil is too much, the oil can be discharged from the oil discharging pipe 13.
[0041] As shown in the drawings, Figures 4-6As shown, the oil collecting drawer 9 is provided with an observation window 14, through which the oil amount in the oil storage cavity 12 can be observed, and the oil collecting drawer 9 is provided with a scale line 15 matched with the observation window 14, through which the oil amount in the oil storage cavity 12 can be numerically reflected.
[0042] As shown, the oil collecting drawer 9 is provided with a handle 16 fixedly connected thereto, through which the oil collecting drawer 9 can be easily pulled out, and the oil collecting drawer 9 can be easily replaced and installed. Figures 4-6
[0043] In use, the raw silk passes through the guide roller 1 and then contacts the first drying roller set 3, the first drying roller set 3 extrudes the raw silk to squeeze out part of the oil in the raw silk, and the oil flows downward due to gravity, first flowing onto the second inclined plate 11 or the first inclined plate 10, and then flowing into the oil storage cavity 12 along the inclined direction of the second inclined plate 11 or the first inclined plate 10. The oil in the oil storage cavity 12 is relatively closed for storage, which can reduce heat exchange with the outside temperature and avoid the oil in the drying box 2 affecting the environment temperature in the drying box 2 as much as possible. When the oil in the drying box 2 is full, the observation window 14 can be used for observation, and the oil in the oil storage cavity 12 can be discharged through the oil discharge pipe 13.
[0044] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.
[0045] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.
Claims
1. A carbon fiber precursor filament drying apparatus characterized by comprising: Including dry box, the inside of dry box is provided with several groups of drying roller group, the adjacent drying roller group is provided with the opening fiber device between.
2. The carbon fiber precursor filament drying apparatus according to claim 1, characterized by, One end of the drying box is provided with a yarn guide roller, and the other end of the drying box away from the yarn guide roller is provided with a yarn guide roller.
3. The carbon fiber precursor filament drying apparatus according to claim 1, characterized by, The drying box comprises a frequency modulation vibration device and a compressed air treatment device, the frequency modulation vibration device is in direct contact with the raw silk, the compressed air treatment device generates dry compressed air and blows to the raw silk, so that the raw silk is separated.
4. The carbon fiber precursor filament drying apparatus according to claim 1, characterized by, A through hole is formed in the drying box, and an oil collecting device matched with the through hole is slidably connected to the drying box.
5. A carbon fiber precursor filament drying apparatus according to claim 4, characterized by A sliding groove is formed in the bottom wall of the drying box, and the oil collecting device comprises an oil collecting drawer, and a positioning block matched with the sliding groove is fixedly connected to the bottom of the oil collecting drawer.
6. A carbon fiber precursor filament drying apparatus according to claim 5, wherein The first and second inclined plates are fixedly connected to the oil collecting drawer, and an oil storage cavity is formed between the second inclined plate and the oil collecting drawer.
7. A carbon fiber precursor filament drying apparatus according to claim 6, characterized by The bottom wall of the oil collecting drawer is an inclined bottom wall.
8. A carbon fiber precursor filament drying apparatus according to claim 7, characterized by An oil discharge pipe matched with the inclined bottom wall is installed on the oil collecting drawer.
9. A carbon fiber precursor filament drying apparatus according to claim 8, characterized by An observation window is formed in the oil collecting drawer, and a scale line is arranged on one side of the oil collecting drawer.
10. The carbon fiber precursor filament drying apparatus according to claim 5, characterized by, An observation window is formed in the oil collecting drawer, and a scale line is arranged on one side of the oil collecting drawer.