PAN precursor washing equipment and working method thereof

Abstract

The invention discloses PAN precursor washing equipment and a working method thereof. The equipment comprises a water washing tank, a cleaning assembly is arranged at the top of the water washing tank, supporting assemblies are arranged on the two sides of the top of the water washing tank, guide assemblies are arranged on the two sides of the water washing tank, the cleaning assembly comprises a hollow cylinder, and the side surface of the hollow cylinder fixedly communicates with a first guide hole; the first guide holes are distributed in an annular array around the central axis of the hollow cylinder, the multiple annular first guide holes are distributed in a linear array along the central axis of the hollow cylinder, the side surface of the hollow cylinder fixedly communicates with middle guide holes, and the middle guide holes are distributed in an annular array. Desalted water is introduced to drive the hollow cylinder to rotate, so that the flexible brush of the hollow cylinder cleans the surface of the protofilament, and meanwhile, the desalted water can also efficiently spray and wash the protofilament, so that the subsequent drafting operation is facilitated, and the production efficiency of the protofilament is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of carbon fiber production, and particularly relates to a PAN precursor washing device and a working method thereof. BACKGROUND

[0002] In the production process of the PAN precursor, the PAN precursor formed through spinning and solidification usually needs to be drawn in multiple stages to improve the orientation degree, and must be fully washed before entering the boiling water drawing process. The core purpose is to completely remove the organic solvent, mainly dimethyl sulfoxide (DMSO), remaining on the surface of the precursor during the spinning and solidification process, which affects the tensile strength of the precursor;

[0003] The prior art uses a polygonal beating rod to make the yarn bundle vibrate slightly to clean the yarn bundle, and the cleaning method is single, the cleaning is not thorough, there are more residues, and the product performance is affected. SUMMARY

[0004] The application aims to provide a PAN precursor washing device and a working method thereof, which improves the rapid cleaning of the surface residues of the yarn bundle and the production capacity, and improves the production efficiency of the precursor.

[0005] In order to achieve the purpose of the application, the application provides a PAN precursor washing device, which comprises a washing tank, and further comprises a cleaning assembly, a supporting assembly and a guiding assembly.

[0006] The cleaning assembly is arranged at the top of the washing tank, the supporting assembly is arranged at both sides of the top of the washing tank, and the guiding assembly is arranged at both sides of the washing tank.

[0007] The cleaning assembly comprises a first guide hole, an intermediate guide hole, a second guide hole, a brush, a hollow cylinder and a communication pipe.

[0008] The side surface of the hollow cylinder is fixedly connected with the first guide hole, the first guide hole is arranged in an annular array along the central axis of the hollow cylinder, a plurality of first guide holes are arranged in a ring along the central axis of the hollow cylinder in a linear array, the side surface of the hollow cylinder is fixedly connected with the intermediate guide hole, and the intermediate guide hole is arranged in an annular array, the first guide hole is mirror-imaged along the middle section cross section of the hollow cylinder to form the second guide hole, the brush is fixedly connected to the side surface of the hollow cylinder, and the other side of the hollow cylinder is fixedly connected with the communication pipe.

[0009] The support assembly includes a rotating shaft, a fixed frame, a connecting groove, and a movable groove; the bottoms of several fixed frames are respectively fixedly connected to the top two sides of the washing tank, one of the fixed frames has the movable groove inside, the rotating shaft is movably sleeved on the inner wall of the movable groove through a bearing, one end of the rotating shaft is fixedly connected to the side of the hollow cylinder, and the connecting groove is opened inside the other fixed frame.

[0010] The inner wall of the connecting groove is movably connected to the outer wall of the connecting pipe via a bearing. The fixed bracket with the connecting groove is located away from the hollow cylinder and is fixedly connected to an external threaded interface. The external threaded interface communicates with the interior of the hollow cylinder through the connecting groove and the connecting pipe.

[0011] The guide assembly includes brackets and a rotating shaft. The bottoms of several brackets are fixedly connected to the top four corners of the washing tank, and the rotating shaft is fixedly connected between every two adjacent brackets.

[0012] The side surface of the rotating shaft is movably sleeved with a guide wheel via a bearing. The side surface of the guide wheel is provided with multiple limiting grooves, and the original wire is movably connected inside the limiting groove.

[0013] One end of the raw filament is connected to the wire feeding device, and the other end of the raw filament is connected to the drawing device. The two guide wheels on the same side of the washing tank are distributed vertically, and the raw filament is wound around the limiting groove of the guide wheel.

[0014] One end of the external threaded interface is connected to the pressurized demineralized water equipment through a conduit, and the demineralized water passes sequentially through the connecting pipe and the hollow cylinder and is discharged from the first guide hole, the intermediate guide hole and the second guide hole.

[0015] The first guide hole and the intermediate guide hole extend from the centerline of the hollow cylinder to both sides, and the first guide hole and the intermediate guide hole are inclined.

[0016] On the other hand, the present invention also provides a method for operating a PAN raw fiber washing device as described above, comprising the following steps:

[0017] Step 1: The raw filaments pass through the first guide wheel, the second guide wheel, the third guide wheel, and the fourth guide wheel of the guide assembly in sequence, and are pulled forward by the rear-end equipment;

[0018] Step 2: Connect the external threaded interface to the pressurized demineralized water equipment. After the demineralized water is introduced into the hollow cylinder, the demineralized water is discharged to the outside through the first guide hole, the middle guide hole and the second guide hole.

[0019] Step 3: Connect the demineralized water pipe to the hollow cylinder, allowing the demineralized water to enter the cleaning assembly. Because the first and second guide holes are arranged in a vortex pattern, the hollow cylinder rotates due to the reaction force when the demineralized water is discharged. This rotation of the hollow cylinder drives a flexible brush to clean the surface of the PAN raw fibers. Since the first, middle, and second guide holes spray out demineralized water, the PAN raw fibers are cleaned through this rinsing process. Because the first and second guide holes extend from the center to both sides, the demineralized water also flows from the center to both sides, causing high-concentration DMSO liquid or detached deposits to be blown to both sides by the steam flow. Furthermore, the direction of the raw fibers' movement is opposite to the rotation direction at the bottom of the hollow cylinder, thus avoiding secondary contamination by DMSO.

[0020] Compared with the prior art, the significant progress of the present invention is as follows: (1) The present invention uses a cleaning method of vortex fluid impact cleaning and brush-assisted cleaning, which helps to quickly clean the residue on the surface of the filament bundle and increase the output; (2) The present invention drives the hollow cylinder to rotate by introducing desalinated water, so that the flexible brush of the hollow cylinder cleans the surface of the raw filament. At the same time, the desalinated water can also perform efficient spray washing on the raw filament, which facilitates subsequent drawing operations, thereby improving the production efficiency of raw filament.

[0021] To more clearly illustrate the functional characteristics and structural parameters of the present invention, further explanation is provided below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the cleaning component structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the planar structure of the cleaning component of the present invention;

[0028] Figure 6 This is a schematic diagram of the external structure of the cleaning component of the present invention.

[0029] The attached figures are labeled as follows: 1-washing tank; 2-cleaning assembly; 3-support assembly; 4-guide assembly; 5-raw wire; 201-first guide hole; 202-intermediate guide hole; 203-second guide hole; 204-flexible brush; 205-hollow cylinder; 206-connecting pipe; 301-rotating shaft; 302-fixed frame; 303-external threaded interface; 304-connecting groove; 305-moving groove; 401-bracket; 402-first guide wheel; 403-limiting groove; 404-rotating shaft; 405-second guide wheel; 406-third guide wheel; 407-fourth guide wheel; 6-cover. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The present invention provides a PAN raw yarn washing device, comprising a washing tank 1, combined with... Figures 1-6 It also includes cleaning component 2, support component 3, and guide component 4;

[0032] The cleaning component 2 is disposed on the top of the washing tank 1, the support component 3 is disposed on both sides of the top of the washing tank 1, and the guide component 4 is disposed on both sides of the washing tank 1.

[0033] The cleaning component 2 includes a first guide hole 201, a middle guide hole 202, a second guide hole 203, a brush 204, a hollow cylinder 205, and a connecting pipe 206;

[0034] The hollow cylinder 205 has a fixed connection to the first guide hole 201 on its side surface. The first guide hole 201 is arranged in a ring array around the central axis of the hollow cylinder 205. Multiple ring-shaped first guide holes 201 are arranged in a linear array along the central axis of the hollow cylinder 205. The hollow cylinder 205 has a fixed connection to the middle guide hole 202, which is also arranged in a ring array. The first guide hole 201 is mirrored along the middle section cross-section of the hollow cylinder 205 to form the second guide hole 203. The brush 204 is fixedly connected to the side surface of the hollow cylinder 205. The other side of the hollow cylinder 205 is fixedly connected to the connecting pipe 206.

[0035] The support assembly 3 includes a rotating shaft 301, a fixed frame 302, a connecting groove 304, and a movable groove 305. The bottoms of several fixed frames 302 are respectively fixedly connected to the top two sides of the washing tank 1. One of the fixed frames 302 has the movable groove 305 inside. The rotating shaft 301 is movably sleeved on the inner wall of the movable groove 305 through a bearing. One end of the rotating shaft 301 is fixedly connected to the side of the hollow cylinder 205. The connecting groove 304 is opened inside the other fixed frame 302.

[0036] The inner wall of the connecting groove 304 is movably connected to the outer wall of the connecting pipe 206 via a bearing. The fixing bracket 302 with the connecting groove 304 is located away from the hollow cylinder 205 and is fixedly connected to an external threaded interface 303. The external threaded interface 303 communicates with the interior of the hollow cylinder 205 through the connecting groove 304 and the connecting pipe 206.

[0037] The guide assembly 4 includes a bracket 401 and a rotating shaft 404. The bottoms of several brackets 401 are fixedly connected to the top four corners of the washing tank 1, and the rotating shaft 404 is fixedly connected between every two adjacent brackets 401.

[0038] The side surface of the rotating shaft 404 is movably sleeved with a guide wheel 402 through a bearing. The side surface of the guide wheel 402 is provided with a plurality of limiting grooves 403, and the original wire 5 is movably connected inside the limiting grooves 403.

[0039] One end of the raw yarn 5 is connected to the wire feeding device, and the other end of the raw yarn 5 is connected to the drawing device. The two guide wheels 402 on the same side of the washing tank 1 are distributed vertically, and the raw yarn 5 is wound around the limiting groove 403 of the guide wheel 402.

[0040] One end of the external threaded interface 303 is connected to the pressurized demineralized water equipment through a conduit, and the demineralized water passes sequentially through the connecting pipe 206 and the hollow cylinder 205 and is discharged from the first guide hole 201, the intermediate guide hole 202 and the second guide hole 203.

[0041] The first guide hole 201 and the intermediate guide hole 202 extend from the centerline of the hollow cylinder 205 to both sides, respectively, and the first guide hole 201 and the intermediate guide hole 202 are inclined.

[0042] The top of the cleaning component 2 is connected to a cover 6 to prevent demineralized water from being sprayed upwards through the guide hole during equipment operation, thus preventing production hazards and waste.

[0043] A method for operating the above-mentioned PAN raw fiber washing equipment includes the following steps:

[0044] Step 1: The raw yarn 5 passes through the first guide wheel 402, the second guide wheel 405, the third guide wheel 406, and the fourth guide wheel 407 of the guide assembly 4 in sequence, and moves forward by being pulled by the rear-end equipment;

[0045] Step 2: The external threaded interface 303 is connected to the pressurized demineralized water equipment. After the demineralized water is introduced into the hollow cylinder 205, the demineralized water is discharged to the outside through the first guide hole 201, the middle guide hole 202 and the second guide hole 203.

[0046] Step 3: Connect the demineralized water pipe to the hollow cylinder 205 to allow the demineralized water to enter the cleaning assembly 2. Since the first guide hole 201 and the second guide hole 203 are arranged in a vortex pattern, the hollow cylinder 205 rotates due to the reaction force when the demineralized water is discharged. This rotation of the hollow cylinder 205 drives the flexible brush 204 to clean the surface of the PAN raw fiber 5. Demineralized water is sprayed from the first guide hole 201, the middle guide hole 202, and the second guide hole 203, achieving cleaning of the PAN raw fiber through rinsing. Because the first guide hole 201 and the second guide hole 203 extend from the center to both sides, the demineralized water also flows from the center to both sides, causing high-concentration DMSO liquid or detached deposits to be blown to both sides by the steam flow. Furthermore, the direction of travel of the raw fiber 5 is opposite to the rotation direction of the bottom of the hollow cylinder 205, thus avoiding secondary contamination by DMSO.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PAN precursor washing apparatus comprising a washing tank (1), characterized in that, It also includes cleaning components (2), support components (3), guide components (4); The cleaning components (2) are arranged on the top of the washing tank (1), the support components (3) are arranged on both sides of the top of the washing tank (1), and the guide components (4) are arranged on both sides of the washing tank (1).

2. A PAN precursor washing apparatus according to claim 1, characterized by The cleaning components (2) include first guide holes (201), intermediate guide holes (202), second guide holes (203), brushes (204), hollow cylinders (205), and communication pipes (206). The side surface of the hollow cylinder (205) is fixedly connected with the first guide holes (201), the first guide holes (201) are arranged in a ring shape along the central axis of the hollow cylinder (205), a plurality of first guide holes (201) are arranged in a ring shape along the central axis of the hollow cylinder (205), the side surface of the hollow cylinder (205) is fixedly connected with the intermediate guide holes (202), and the intermediate guide holes (202) are arranged in a ring shape, the first guide holes (201) are mirror images of the second guide holes (203) along the middle section of the hollow cylinder (205), the brushes (204) are fixedly connected to the side surface of the hollow cylinder (205), and the other side of the hollow cylinder (205) is fixedly connected with the communication pipe (206).

3. A PAN precursor washing apparatus according to claim 2, wherein The support components (3) include shafts (301), fixed frames (302), communication grooves (304), and movable grooves (305). The bottoms of a plurality of fixed frames (302) are fixedly connected to both sides of the top of the washing tank (1), one of the fixed frames (302) is internally provided with the movable groove (305), the movable groove (305) is movably sleeved with the shaft (301) on the inner wall through a bearing, one end of the shaft (301) is fixedly connected to the side surface of the hollow cylinder (205), and the other fixed frame (302) is internally provided with the communication groove (304).

4. A PAN precursor washing apparatus according to claim 3, wherein The inner wall of the communication groove (304) is movably connected with the outer wall of the communication pipe (206) through a bearing, the fixed frame (302) with the communication groove (304) is fixedly connected with an external thread interface (303) away from the side of the hollow cylinder (205), and the external thread interface (303) is in communication with the inside of the hollow cylinder (205) through the communication groove (304) and the communication pipe (206).

5. A PAN precursor washing apparatus according to claim 1, wherein The guide components (4) include supports (401) and shafts (404). The bottoms of a plurality of supports (401) are fixedly connected to the top corners of the washing tank (1), and the shafts (404) are fixedly connected between every two adjacent supports (401).

6. A PAN precursor washing apparatus according to claim 5, wherein The side surface of the shaft (404) is movably sleeved with a guide wheel (402) through a bearing, the side surface of the guide wheel (402) is provided with a plurality of limiting grooves (403), and the inside of the limiting groove (403) is movably connected with a raw silk (5).

7. A PAN precursor washing apparatus according to claim 6, wherein One end of the original wire (5) is connected to the wire drawing device, the other end of the original wire (5) is connected to the drafting device, the water washing tank (1) is distributed on the same side of the two guide wheels (402) and the original wire (5) is wound in the limiting groove (403) of the guide wheel (402).

8. A PAN precursor washing apparatus according to claim 4, wherein One end of the outer threaded interface (303) is connected to the pressurized desalinated water device through the conduit, and the desalinated water is discharged from the first guide hole (201), the intermediate guide hole (202) and the second guide hole (203) through the communication pipe (206) and the hollow cylinder (205) in sequence.

9. A PAN precursor washing apparatus according to claim 2, wherein The extension directions of the first guide hole (201) and the intermediate guide hole (202) are extended to both sides from the center line of the hollow cylinder (205), and the first guide hole (201) and the intermediate guide hole (202) are inclined.

10. A method of operating a PAN tow washing apparatus as claimed in any one of claims 1 to 9, characterised in that, The steps include: Step 1, the original wire (5) passes through the first guide wheel (402), the second guide wheel (405), the third guide wheel (406) and the fourth guide wheel (407) of the guide assembly (4) in sequence, and is pulled forward by the rear-end device; Step 2, the outer threaded interface (303) is connected to the pressurized desalinated water device, and after the desalinated water enters the hollow cylinder (205), the desalinated water is discharged to the outside through the first guide hole (201), the intermediate guide hole (202) and the second guide hole (203); Step 3, the desalinated water pipe is connected to the hollow cylinder (205), so that the desalinated water enters the cleaning assembly (2); due to the vortex distribution of the first guide hole (201) and the second guide hole (203), the hollow cylinder (205) is driven to rotate by the reaction force when the desalinated water is discharged, and the rotation of the hollow cylinder (205) drives the flexible brush (204) to clean the surface of the original wire (5); due to the first guide hole (201), the intermediate guide hole (202) and the second guide hole (203) can spray desalinated water, and the PAN original wire is cleaned by washing with desalinated water; due to the extension directions of the first guide hole (201) and the second guide hole (203) extending from the middle to both sides, the guide direction of the desalinated water also flows from the middle to both sides, so that the high-concentration DMSO liquid or the attached material falling off is blown to both sides by the steam flow, and the traveling direction of the original wire (5) is opposite to the rotating direction of the bottom of the hollow cylinder (205), thereby avoiding secondary pollution of DMSO.

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