Precipitation removing device for carbon fiber sizing tank

Abstract

The utility model discloses a sediment removing device for a carbon fiber sizing tank. A movable sediment scraper is arranged on the bottom surface of a tank body of the sizing tank; the movable precipitation scraping plate can move on the bottom surface of the tank body in a reciprocating manner and is used for scraping precipitates at the bottom of the sizing tank; the precipitation scraping direction of the movable precipitation scraping plate is opposite to the motion direction of the carbon fibers; a precipitation hopper is arranged at the tail end of the bottom of the sizing tank in the precipitation scraping direction in a sinking manner for solid-liquid phase separation; the bottom of the precipitation hopper is vertically connected with a separation tank for receiving precipitates discharged by the precipitation hopper, and the separation tank is connected with the starting position of the sizing tank in the precipitation scraping direction through a circulating pipeline. According to the device disclosed by the utility model, in the carbon fiber preparation process, sediments at the bottom of the sizing tank are automatically cleaned, and solid and liquid phases in the process are classified. The carbon fiber sizing device can effectively improve the apparent quality of carbon fibers, improve the stability of a production line and achieve automation of the sizing process in carbon fiber production.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber production, specifically to a device for removing sediment from a carbon fiber sizing tank. Background Technology

[0002] Carbon fiber possesses excellent mechanical properties and is hailed as a new material of the 21st century. Due to its high modulus, high strength, low specific gravity, high temperature resistance, fatigue resistance, and corrosion resistance, carbon fiber composites with advanced resins have wide applications in modern aerospace, sports and leisure products, civil engineering, electronics, and medical devices.

[0003] The sizing process is the final step in the carbon fiber manufacturing process before it is wound into finished product after surface treatment. The main functions of sizing are to bundle and protect the carbon fibers, reduce friction, and improve the chemical bonding between the carbon fibers and resin, thus enhancing the interfacial properties of the composite material. During sizing, sizing agent particles and loose fibers tend to accumulate at the bottom of the sizing tank. If not cleaned promptly, this will affect the internal circulation of the tank, consequently impacting the resin content control of the carbon fibers. Furthermore, as the amount of precipitated impurities increases, they can adhere to the surface of normally functioning fibers, causing surface defects and affecting carbon fiber quality. Therefore, a sediment removal device for the carbon fiber sizing tank is crucial. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a carbon fiber sizing tank sediment removal device.

[0005] To achieve the objective of this utility model, a sediment removal device for a carbon fiber sizing tank is disclosed.

[0006] The device includes

[0007] Sizing tank;

[0008] A movable sedimentation scraper is installed on the bottom surface of the slurry tank;

[0009] The movable sedimentation scraper can move back and forth on the bottom surface of the tank to scrape off sediment from the bottom of the slurry tank.

[0010] The movable sedimentation scraper removes sediment in the opposite direction to the movement of the carbon fiber.

[0011] Furthermore, at the end of the direction of scraping off sediment, a sedimentation hopper is set at the bottom of the slurry tank to separate the solid and liquid phases;

[0012] The bottom of the sedimentation hopper is vertically connected to the separation tank, which is used to receive the sediment discharged from the sedimentation hopper. The separation tank is connected to the slurry tank at the starting position of the sediment scraping direction through a circulation pipe.

[0013] This invention enables the automatic cleaning of sediment at the bottom of the sizing tank during carbon fiber preparation and the classification and treatment of the solid and liquid phases in the process. This method effectively improves the appearance quality of carbon fibers, enhances production line stability, and significantly increases the automation level of carbon fiber production.

[0014] Compared with existing technologies, the significant advancement of this invention lies in its ability to automatically clean the sediment at the bottom of the sizing tank during carbon fiber preparation and to classify the solid and liquid phases involved in the process. This method effectively improves the appearance quality of carbon fibers, enhances production line stability, and significantly increases the automation level of carbon fiber production.

[0015] To more clearly illustrate the functional characteristics and structural parameters of this utility model, the following description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the device of this utility model;

[0019] Figure 3 A schematic diagram (top view) of the movable sedimentation scraper A in operation;

[0020] Figure 4 This is a diagram showing the movable sedimentation scraper A and its track connection.

[0021] 1. Slurry tank; 2. Movable sedimentation scraper; 3. Sedimentation hopper; 4. Movable sliding cover; 5. Separation tank; 6. Transfer pump; 7. Pre-set track. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a device for removing sediment from a carbon fiber sizing tank. The device includes:

[0024] A sizing tank 1; a movable sedimentation scraper 2 is installed on the bottom surface of the sizing tank 1.

[0025] The movable sedimentation scraper 2 can move back and forth on the bottom surface of the tank to scrape off the sediment at the bottom of the sizing tank 1. The scraping direction of the movable sedimentation scraper 2 is opposite to the movement direction of the carbon fiber.

[0026] Pressure and distance sensors are embedded in the edge of the rubber sheet at the bottom of the movable sedimentation scraper. As the scraper moves, the pressure sensor detects the contact pressure between the scraper and the sediment at the bottom of the slurry tank in real time, and the control system (PLC) automatically adjusts the motor output power to change the scraping force. The distance sensor monitors the distance between the scraper and the bottom of the slurry tank, ensuring the scraper always adheres to the bottom surface and preventing incomplete scraping due to unevenness.

[0027] Furthermore, at the bottom of the slurry tank 1, at the end of the direction of scraping off sediment, a sedimentation hopper 3 is set down to perform solid-liquid phase separation;

[0028] The bottom of the sedimentation hopper 3 is vertically connected to the separation tank 5, which is used to receive the sediment discharged through the sedimentation hopper 3. The separation tank 5 is connected to the slurry tank 1 at the starting position in the direction of scraping sediment through a circulation pipe.

[0029] This utility model provides a specific implementation scheme in which the bottom surface of the slurry tank 1 is inclined downward along the direction of scraping off sediment.

[0030] This utility model provides a specific implementation scheme. The sedimentation tank 3 of this utility model is used to temporarily store precipitated substances. The bottom of the sedimentation tank 3 is provided with a discharge port, and below the discharge port is a separation tank 5, which is used to empty the precipitated substances in the sedimentation tank 3.

[0031] This utility model provides a specific implementation scheme in which a movable sedimentation scraper 2 is connected to a motor and is driven by the motor to move back and forth along a preset track 7 at the bottom of the slurry tank 1 to remove sediment at the bottom of the slurry tank 1.

[0032] This utility model provides a specific implementation scheme in which limit blocks are provided at both ends of the track to prevent the movable sedimentation scraper 2 from moving beyond the track.

[0033] This utility model provides a specific implementation scheme in which the movable sedimentation scraper 2 has a flexible structure, wherein the upper part is made of 316L stainless steel and the lower part is a replaceable rubber sheet.

[0034] This utility model provides a specific implementation scheme in which the sedimentation tank 3 is provided with a movable sliding cover 4.

[0035] Specifically, a movable sliding cover 4 is installed at the inlet of the sedimentation hopper 3. When venting, the sliding cover moves to seal the sedimentation hopper 3, preventing the sizing agent in the sizing tank 1 from being instantly discharged through the outlet of the sedimentation hopper 3 during the venting process.

[0036] This utility model provides a specific implementation scheme in which the separation tank 5 is used to receive the precipitate discharged through the sedimentation tank 3, and is connected to the sedimentation tank 3 through the drain pipe to perform solid-liquid phase separation.

[0037] This invention provides a specific implementation scheme in which the separation tank 5 is equipped with two-stage filters. The filter precision decreases sequentially along the flow direction, and is used for solid-liquid phase separation. For the solid phase (precipitate), the precipitate is removed by periodically replacing and cleaning the filter screen. For the liquid phase (sizing agent), the filtered liquid phase is recycled to improve recovery efficiency.

[0038] This invention provides a specific implementation scheme in which the liquid phase (sizing agent) is discharged from the bottom of the separation tank 5, and a transfer pump 6 is installed to transport it to the sizing tank 1 through a circulation pipeline. Under the action of the transfer pump 6, a slight negative pressure is formed in the separation tank 5, so that the precipitate in the sedimentation tank 3 can be discharged smoothly, thereby improving the solid-liquid phase separation effect in the separation tank 5.

[0039] The working principle and process of this utility model are as follows:

[0040] This invention uses a movable sedimentation scraper 2 to clean the sediment at the bottom of the sizing tank 1 during carbon fiber preparation. The sediment passes through a sedimentation hopper 3 and then enters a separation tank 5 for solid-liquid phase separation. The solid phase is cleaned periodically, while the liquid phase is recycled.

[0041] The bottom of the slurry tank 1 is equipped with a movable settling scraper 2 and a settling hopper 3. The movable settling scraper 2... Figure 1 As shown, the motor drives the reciprocating movement along the preset track 7 at the bottom of the slurry tank 1 to remove the sediment at the bottom of the slurry tank 1. Limiting blocks are provided at both ends of the track to prevent the movable sediment scraper 2 from moving beyond the track.

[0042] The reciprocating movement of the movable sedimentation scraper 2 enables the sizing agent inside the sizing tank 1 to surge, thereby reducing the deposition of the sizing agent.

[0043] Under normal operating conditions, driven by a motor, the movable settling scraper 2 reciprocates along a preset track to scrape away the sediment at the bottom of the sizing tank, preventing sediment buildup from affecting the circulation of the sizing agent and the quality of the carbon fiber. The rubber sheet at the bottom of the scraper contacts the bottom surface, scraping up the sediment and pushing it towards the settling hopper.

[0044] When the pressure sensor detects fluctuations in the contact pressure between the scraper and the sediment under uneven sediment thickness conditions, it indicates that the sediment thickness is uneven. The control system (PLC) controls the distance between the movable sediment scraper 2 and the bottom of the slurry tank, and at the same time controls the output power of the drive motor to adjust the scraping force of the scraper, so as to ensure that the thick sediment area can also be effectively cleaned.

[0045] When the bottom surface of the sizing tank is uneven, the distance sensor monitors the distance between the scraper and the bottom surface of the sizing tank. If the distance is too large, the control system (PLC) fine-tunes the position of the scraper so that the scraper always fits the bottom surface, ensuring the scraping effect and avoiding sediment residue caused by the uneven bottom surface.

[0046] The sediment at the bottom of the sizing tank 1 flows into the sedimentation hopper 3 as the movable sedimentation scraper 2 moves, where it settles. The sediment in the sedimentation hopper 3 is periodically emptied. Before emptying, the movable sliding cover 4 moves to seal the sedimentation hopper 3, preventing the sizing agent in the sizing tank 1 from being instantly discharged through the outlet of the sedimentation hopper 3 during the emptying process.

[0047] When the sediment in sedimentation hopper 3 is emptied, the sediment is discharged through a pipe to separation tank 5. Separation tank 5 is equipped with two-stage filters to separate the solid (sediment) and liquid (sizing agent) phases of the emptied sediment. The filtration precision of the two-stage filters increases sequentially, with the first-stage filter performing coarse filtration and the second-stage filter performing fine filtration. This two-stage filtration design enhances the filtration effect and achieves fine separation of the solid phase (sediment). The solid phase (sediment) is located on the upper surface of the filter screen, and the filter screen is replaced and cleaned periodically. The liquid phase (sizing agent) is recovered and recycled into sizing tank 1 to reduce sizing agent loss during the process.

[0048] The recovered sizing agent was simply filtered and circulated without adequately considering performance improvement. Ultrasonic equipment was used to treat the recovered sizing liquid, with the ultrasonic frequency controlled at 20-30 kHz and the treatment time at 10-15 minutes. This refined the particles of the recovered sizing agent, further improving its flowability and sizing performance. After ultrasonic treatment, the re-precipitation of the recovered sizing agent decreased by 5%, and the ultrasonic process parameters effectively improved the sizing quality.

[0049] The treated liquid phase (sizing agent) is discharged from the bottom of the separation tank 5 and transferred to the sizing tank 1 via the transfer pump 6. Under the action of the transfer pump 6, a slight negative pressure is formed in the separation tank 5 so that the precipitate in the sedimentation tank 3 can be discharged smoothly, thereby improving the solid-liquid phase separation effect in the separation tank 5.

[0050] 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.

[0051] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for removing sediment from a carbon fiber sizing tank, characterized in that, The device includes: Sizing tank; A movable sedimentation scraper is installed on the bottom surface of the slurry tank; The movable sedimentation scraper can move back and forth on the bottom surface of the tank to scrape off sediment from the bottom of the slurry tank. The movable sedimentation scraper removes sediment in the opposite direction to the movement of the carbon fiber. Furthermore, at the end of the direction of scraping off sediment, a sedimentation hopper is set at the bottom of the slurry tank to separate the solid and liquid phases; The bottom of the sedimentation hopper is vertically connected to the separation tank, which is used to receive the sediment discharged from the sedimentation hopper. The separation tank is connected to the slurry tank at the starting position of the sediment scraping direction through a circulation pipe.

2. The carbon fiber sizing tank sediment removal device according to claim 1, characterized in that, The sedimentation hopper is used to temporarily store precipitated substances. A drain is provided at the bottom of the sedimentation hopper, and a separation tank is located below the drain to empty the precipitated substances from the sedimentation hopper.

3. The carbon fiber sizing tank sediment removal device according to claim 1, characterized in that, The movable sedimentation scraper is connected to a motor and is driven by the motor to move back and forth along a preset track at the bottom of the slurry tank to remove sediment from the bottom of the slurry tank.

4. The carbon fiber sizing tank sediment removal device according to claim 3, characterized in that, Limit blocks are provided at both ends of the track to prevent the movable sedimentation scraper from moving beyond the track.

5. A carbon fiber sizing tank sediment removal device according to claim 1, 3 or 4, wherein the movable sedimentation scraper is a flexible structure, wherein the upper part is made of 316L stainless steel and the lower part is a replaceable rubber sheet.

6. The carbon fiber sizing tank sediment removal device according to claim 1, characterized in that, The sedimentation hopper is equipped with a movable sliding cover.

7. The carbon fiber sizing tank sediment removal device according to claim 1, characterized in that, A movable sliding cover is installed at the inlet of the sedimentation hopper. When venting, the sliding cover moves to seal the sedimentation hopper, preventing the sizing agent in the sizing tank from being instantly discharged through the outlet of the sedimentation hopper during the venting process.

8. The carbon fiber sizing tank sediment removal device according to claim 1, characterized in that, The separation tank is used to receive the precipitate discharged from the sedimentation tank. It is connected to the sedimentation tank through a drain pipe and performs solid-liquid phase separation.

9. A carbon fiber sizing tank sediment removal device according to claim 8, characterized in that, The separation tank is equipped with two-stage filters, with the filter precision decreasing sequentially along the flow direction, for solid-liquid phase separation.

10. A carbon fiber sizing tank sediment removal device according to claim 1, 8, or 9, characterized in that, The separation tank discharges the liquid phase sizing agent from the bottom, and a transfer pump is installed to transport it to the sizing tank through a circulation pipeline.

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