A double air bag self-adaptive scraper device driven by an oiling roller body on a carbon fiber precursor

Abstract

The application discloses a kind of carbon fiber precursor oiling driving roller body double air bag self-adapting scraper device, the device includes scraper base, adjustable base shaft, main pressurized air bag, scraper pin shaft, auxiliary buffer air bag, self-adapting scraper clamp, elastic scraper blade and intelligent air pressure control system;Through double air bag cooperative driving and intelligent air pressure regulation, realize the flexible fit of scraper and roller surface, pressure dynamic adaptation and quick separation, simultaneously combined with adjustable structure adapts different diameter roller body.The application has compact structure, convenient operation, can effectively remove the oil film and impurities on the surface of roller, avoid roller scratch and tow defects, reduce labor intensity and safety risk, improve the production efficiency and product quality of precursor, adapt to the continuous operation demand of polyacrylonitrile precursor production line.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for the production of polyacrylonitrile-based carbon fiber precursor, specifically a dual-airbag adaptive scraper device for oiling drive rollers, suitable for dynamic cleaning of oil film and impurities on the roller surface during precursor production. Background Technology

[0002] In the industrial production process of polyacrylonitrile precursor fibers, after the fiber bundle is oiled in an oil bath, it needs to be pulled to the subsequent drying process by a drive roller. During this process, the oil, trace amounts of precursor fiber debris, and environmental dust carried by the fiber bundle gradually accumulate on the surface of the drive roller, forming an uneven oil film and impurity layer. If not removed in time, this impurity layer will enter the drying stage simultaneously with the fiber bundle, where it will undergo thermal melting and adhesion under high temperature, causing problems such as fiber bundling and roller sticking. This can lead to fuzzy fibers and broken fibers, severely affecting the linear density uniformity and surface smoothness of the precursor fiber, and reducing the mechanical properties of the final carbon fiber product. Currently, the industry mainly divides the cleaning methods for oil-driven rollers into two categories: one is manual intermittent cleaning with hand-held blades and scrapers. This method is not only inefficient, but the instability of manual operation can easily cause scratches and wear on the roller surface. It also poses safety hazards such as operators being pinched by the roller or cut by the blades. The other type is a scraper device driven by a single airbag or spring. This type of device can only achieve simple contact or separation between the scraper and the roller. It cannot dynamically adjust the scraper pressure according to the roller speed and oil film thickness. It is prone to problems such as incomplete cleaning (insufficient pressure) or excessive wear of the roller and scraper (excessive pressure). In addition, it has poor adaptability to rollers of different diameters and lacks versatility.

[0003] Therefore, developing a drive roller cleaning device that can adaptively adjust the scraper pressure, adapt to multiple roller specifications, balance cleaning effect and equipment protection, and has safe and automated operation capabilities has become a key requirement for solving the pain points of existing technologies and improving the stability of raw yarn production. Summary of the Invention

[0004] To address the problems of low efficiency, poor safety, inability to dynamically adjust scraper pressure, and lack of versatility in existing cleaning methods, the purpose of this invention is to provide a dual-airbag adaptive scraper device for oiling drive rollers.

[0005] In a first aspect, the present invention provides a dual-airbag adaptive scraper device for a carbon fiber precursor oiling drive roller, comprising an installation assembly, a dual-airbag drive assembly, an adaptive scraper assembly, and an intelligent control assembly; the installation assembly includes a scraper base and an adjustable base shaft, the adjustable base shaft extending laterally through the scraper base and being axially adjustable via a locking nut; the dual-airbag drive assembly includes a main pressurizing airbag, an auxiliary buffer airbag, an airbag fixing seat, and an inflation control unit, the airbag fixing seat base being fixed to the upper part of the scraper base, with its center position... A through-hole pin is provided, and the main pressurizing airbag and the auxiliary buffer airbag are symmetrically arranged on both sides of the airbag fixing seat; the adaptive scraper assembly includes a scraper pin, an adaptive scraper clamp, and an elastic scraper blade. The scraper pin passes through the pin hole of the airbag fixing seat base and the central column through hole of the adaptive scraper clamp. The elastic scraper blade is fixed to the front end of the adaptive scraper clamp, and the adaptive scraper clamp rotates and swings around the scraper pin; the intelligent control component is electrically connected to the inflation control unit of the dual airbag drive assembly and is used to dynamically adjust the inflation pressure of the dual airbags.

[0006] Compared with the prior art, the advantages of the present invention are:

[0007] The dual-airbag adaptive scraper device consists of four parts: an installation component, a dual-airbag drive component, an adaptive scraper component, and an intelligent control component. Each component works in concert to achieve flexible contact, pressure adjustment, and rapid separation between the scraper and the roller. It also has an installation position adjustment function to adapt to rollers of different specifications.

[0008] This invention features a compact structure and convenient operation. It can effectively remove oil film and impurities from the roller surface, avoid roller scratches and filament defects, reduce manual labor intensity and safety risks, improve the efficiency of raw filament production and product quality, and meet the continuous operation requirements of polyacrylonitrile raw filament production lines. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the dual-airbag adaptive scraper device of the present invention;

[0010] Figure 2 Diagram showing the connection of the intelligent control components.

[0011] In the diagram: 1-Scraper base, 2-Adjustable base shaft, 3-Airbag fixing base, 4-Main pressurizing airbag, 5-Scraper pin, 6-Auxiliary buffer airbag, 7-Adaptive scraper clamp, 8-Elastic scraper blade, 9-Airbag fixing base, 10-Inflation control unit, 11-Intelligent control component, 12-Speed ​​sensor, 13-Pressure sensor. Detailed Implementation

[0012] To better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0013] Various aspects of the invention are described in this disclosure with reference to the accompanying drawings, in which numerous illustrative embodiments are shown.

[0014] The embodiments disclosed herein are not necessarily intended to encompass all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed herein are not limited to any particular implementation. Furthermore, some aspects of the invention disclosed may be used alone or in any suitable combination with other aspects of the invention disclosed.

[0015] The present invention adopts the following technical solution:

[0016] 1. Overall structural design: The dual-airbag adaptive scraper device consists of four parts: installation components, dual-airbag drive components, adaptive scraper components, and intelligent control components. Each component works in concert to achieve flexible contact, pressure adjustment, and rapid separation between the scraper and the roller. It also has an installation position adjustment function to adapt to rollers of different specifications.

[0017] 2. Installation Component Structure: The scraper base is made of high-strength aluminum alloy and has a waist-shaped adjustment hole at the bottom. It can be fixed to the production line frame with bolts and can achieve fine-tuning of position from 0-10mm up and down. The adjustable base shaft runs horizontally through the scraper base and is locked in axial position by locking the nut, which is convenient for adaptation and adjustment according to the horizontal position of the roller. The airbag fixing seat is fixed to the upper part of the scraper base with bolts. The pin hole in the middle of the seat cooperates with the scraper pin and provides a rotation support point for the scraper clamp.

[0018] 3. Adaptive Scraper Assembly Structure: The adaptive scraper fixture is made of high-strength engineering plastic. A wear-resistant bushing is embedded in the central column through hole to reduce relative wear with the scraper pin and extend service life. An elastic buffer pad is provided in the adjustable scraper mounting groove at the front end of the fixture. The elastic scraper blade is fixed in the mounting groove by bolts. The buffer pad can compensate for the contact gap between the scraper blade and the roller surface and avoid roller scratches caused by hard contact. The elastic scraper blade is made of polyurethane composite rubber, which has both flexibility and wear resistance. The arc-shaped working surface is adapted to the arc of the roller. The gradient thickness design can ensure the cleaning effect of the cutting edge and improve the strength of the root structure. The wear-resistant coating on the cutting edge can extend the service life.

[0019] 4. Dual-airbag drive assembly structure: The main pressurizing airbag and the auxiliary buffer airbag are symmetrically arranged on both sides of the scraper pin shaft and fixed to both sides of the scraper pin shaft by the airbag fixing seat. The airbag is made of oil-resistant nitrile rubber, which can withstand the corrosion of oil in the raw yarn production environment. The surface anti-scratch protective layer avoids friction damage with the clamp. The inflation control unit divides the compressed air into two paths through the diversion valve and supplies them to the two airbags respectively. Each airbag has an independent pressure reducing valve and solenoid reversing valve to realize independent control of inflation and deflation. The pressure reducing valve has a pressure feedback function and can monitor the airbag pressure in real time.

[0020] 5. Intelligent Control and Working Principle: The controller of the intelligent control component is electrically connected to the speed sensor, pressure sensor, pressure reducing valve, and solenoid directional valve. The speed sensor collects the real-time speed of the drive roller and transmits it to the controller. The controller automatically adjusts the working pressure of the main pressurizing airbag and the auxiliary buffer airbag according to the preset "speed-pressure" matching model. When cleaning is required, the controller controls the solenoid directional valve to inflate the main pressurizing airbag and deflate the auxiliary buffer airbag. The main pressurizing airbag pushes the scraper clamp side arm downward, causing the clamp to rotate around the scraper pin shaft, which lifts the front scraper blade upward and flexibly adheres to the roller. On the surface of the roller, a pressure sensor provides real-time feedback on the contact pressure. The controller fine-tunes the pressure through a pressure reducing valve to maintain the optimal contact pressure between the scraper and the roller (the pressure range is controlled between 0.2-0.6 MPa depending on the roller speed). During the cleaning process, if the roller speed changes or the pressure is abnormal, the controller automatically adjusts the pressure of the dual airbags to achieve adaptive matching. When cleaning is completed or maintenance is required, the controller controls the auxiliary buffer airbag to inflate and the main pressurizing airbag to deflate and contract. The auxiliary buffer airbag pushes the scraper clamp side arm upward, causing the scraper blade to detach downward from the roller surface, thus preventing the scraper blade from contacting the roller and causing wear when idle.

[0021] 6. Adaptability Design: Through the vertical fine-tuning of the waist-shaped adjustment hole on the scraper base and the axial adjustment of the adjustable base shaft, combined with the arc-shaped structure of the elastic scraper blade and the compensation effect of the buffer pad, this device can adapt to oiling drive rollers of different specifications with diameters of 80-150mm without replacing core components, demonstrating strong versatility. This invention provides a simple and easy-to-use dual-airbag scraper cleaning device for oiling drive rollers of polyacrylonitrile raw yarn, enabling timely and effective cleaning of these rollers.

[0022] like Figure 1-2 As shown, this embodiment provides a dual-airbag adaptive scraper device for a carbon fiber filament oiling drive roller, including a scraper base 1, an adjustable base shaft 2, an airbag fixing base 3, a main pressurizing airbag 4, a scraper pin shaft 5, an auxiliary buffer airbag 6, an adaptive scraper clamp 7, an elastic scraper blade 8, an airbag fixing base 9, an inflation control unit 10, and an intelligent control component 11.

[0023] The scraper base 1 is made of 6061 aluminum alloy and has two oblong adjustment holes at the bottom. It is fixed to the production line frame with M12 bolts. The vertical adjustment stroke of the oblong holes is 0-10mm, and the position of the device can be finely adjusted according to the installation height of the roller. The adjustable base shaft 2 is made of 45 steel and passes through the through hole of the scraper base 1 laterally. The axial position is locked by two locking nuts. The adjustment range is 0-15mm to adapt to the horizontal position requirements of the roller.

[0024] The airbag fixing base 3 of the airbag fixing base 9 is a stamped steel plate part, which is fixed to the upper part of the scraper base 1 by M8 bolts. A pin hole with a diameter of 20mm is opened in the middle, and a scraper pin 5 is set on it. The scraper pin 5 passes through the pin hole of the airbag fixing base 3 and the through hole of the central column of the adaptive scraper clamp 7. The pin hole and the scraper pin 5 are clearance fit. The scraper pin 5 is a quenched and tempered part of No. 45 steel with chrome plating for rust prevention.

[0025] The adaptive scraper clamp 7 is made of PA66 engineering plastic. A brass wear-resistant bushing is embedded in the through hole of the central column to reduce relative wear with the scraper pin 5. An adjustable scraper mounting groove with a width of 10mm is opened at the front end of the clamp. A silicone elastic buffer pad with a thickness of 2mm is pasted in the groove. The elastic scraper blade 8 is fixed in the mounting groove by two M5 bolts. The elastic scraper blade 8 is made of polyurethane composite rubber with a Shore hardness of 85. The curvature of the working surface is adapted to the 100mm diameter drive roller. The blade edge thickness is 1mm and the root thickness is 4mm. The blade edge surface is coated with a polytetrafluoroethylene wear-resistant coating.

[0026] Both the main pressurizing airbag 4 and the auxiliary buffer airbag 6 are made of oil-resistant nitrile rubber and covered with nylon anti-scratch cloth. The inflation stroke of the main pressurizing airbag 4 is 6mm and the inflation stroke of the auxiliary buffer airbag 6 is 4mm. Both are fixedly connected to the airbag fixing seat 9 by bolts and are symmetrically distributed on both sides of the scraper pin shaft 5. When the airbag is full of gas, the airbag output end abuts against the two arms of the adaptive scraper clamp 7.

[0027] The inflation control unit 10 includes a small air compressor (exhaust pressure 0.8MPa), a diverter valve, two independent precision pressure reducing valves and a solenoid reversing valve. The diverter valve divides the compressed air into two paths, which are connected to the main pressurizing airbag 4 and the auxiliary buffer airbag 6 respectively through the pressure reducing valve and the solenoid reversing valve. The pressure reducing valve has an accuracy of ±0.01MPa and is equipped with a pressure feedback interface.

[0028] The intelligent control component 11 adopts a PLC controller, equipped with a speed sensor 12 (installed at the input end of the drive roller, measuring range 0-500 r / min) and two pressure sensors 13 (installed in the air circuits of the main pressurizing airbag 4 and the auxiliary buffer airbag 6, respectively). The controller is electrically connected to the speed sensor 12, pressure sensor 13, pressure reducing valve and solenoid reversing valve through wires. The preset "speed-pressure" matching model is as follows: when the roller speed is 100-200 r / min, the scraper adhesion pressure is controlled at 0.2-0.3 MPa; when the speed is 200-350 r / min, the pressure is controlled at 0.3-0.45 MPa; when the speed is 350-500 r / min, the pressure is controlled at 0.45-0.6 MPa.

[0029] The working process of this embodiment is as follows: After the equipment is started, the speed sensor 12 collects the real-time speed of the drive roller (e.g., 250 r / min) and transmits it to the PLC controller. According to the preset model, the controller controls the electromagnetic reversing valve and the pressure reducing valve of the inflation control unit 10, so that the main pressurizing airbag 4 is inflated to 0.4 MPa and the auxiliary buffer airbag 6 is deflated and contracted. The main pressurizing airbag 4 pushes the side arm of the adaptive scraper clamp 7 to move downward. The adaptive scraper clamp 7 rotates around the scraper pin 5, and the front elastic scraper blade 8 is lifted upward and flexibly adheres to the surface of the roller. Sensor 13 provides real-time feedback of pressure values, and the controller fine-tunes the pressure reducing valve to stabilize the pressure at 0.4 MPa. During the cleaning process, if the roller speed increases to 380 r / min, the controller automatically adjusts the pressure of the main pressurizing airbag 4 to 0.5 MPa to maintain the best cleaning effect. When the production line stops or needs maintenance, the controller controls the auxiliary buffer airbag 6 to inflate to 0.3 MPa, the main pressurizing airbag 4 to deflate and contract, the auxiliary buffer airbag 6 pushes the side arm of the adaptive scraper clamp 7 to move upward, and the elastic scraper blade 8 moves downward away from the roller surface, completing the operation cycle.

[0030] When it is necessary to adapt to a drive roller with a diameter of 120mm, loosen the fixing bolts of the scraper base 1, make a slight upward adjustment of 5mm through the waist-shaped adjustment hole, loosen the locking nut to adjust the axial position of the adjustable base shaft 2, so that the elastic scraper blade 8 is aligned with the center of the roller, and then tighten the bolts and nuts again. No other parts need to be replaced, and the adaptability is strong.

[0031] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A dual-airbag adaptive scraper device for oiling carbon fiber precursor rollers, characterized in that, The system includes an installation component, a dual-airbag drive component, an adaptive scraper component, and an intelligent control component. The installation component includes a scraper base (1) and an adjustable base shaft (2). The adjustable base shaft (2) extends laterally through the scraper base (1) and is axially adjustable via a locking nut. The dual-airbag drive component includes a main pressurizing airbag (4), an auxiliary buffer airbag (6), an airbag mounting base (9), and an inflation control unit (10). The airbag mounting base (3) of the airbag mounting base (9) is fixed to the upper part of the scraper base (1), and a through-hole pin is provided at its center. The main pressurizing airbag (4) and the auxiliary buffer airbag... The airbags (6) are symmetrically arranged on both sides of the airbag fixing seat (9); the adaptive scraper assembly includes a scraper pin (5), an adaptive scraper clamp (7) and an elastic scraper blade (8). The scraper pin (5) passes through the pin hole of the airbag fixing seat base (3) and the central column through hole of the adaptive scraper clamp (7). The elastic scraper blade (8) is fixed to the front end of the adaptive scraper clamp (7). The adaptive scraper clamp (7) rotates and swings around the scraper pin (5). The intelligent control component (11) is electrically connected to the inflation control unit (10) of the dual airbag drive assembly and is used to dynamically adjust the inflation pressure of the dual airbags.

2. The apparatus according to claim 1, characterized in that, The adaptive scraper clamp (7) has a wear-resistant bushing on the inner wall of the central column through hole. When the main pressurizing airbag (4) and the auxiliary buffer airbag (6) are filled with gas, their two outer arms abut against the output ends of the main pressurizing airbag (4) and the auxiliary buffer airbag (6) respectively. The front end is provided with an adjustable scraper mounting groove. The mounting groove is provided with an elastic buffer pad to compensate for the contact error between the elastic scraper blade (8) and the roller.

3. The apparatus according to claim 1, characterized in that, The elastic scraper blade (8) is made of polyurethane composite rubber. Its working surface is an arc-shaped structure, and the arc is adapted to the outer circumferential arc of the drive roller body to be cleaned. The thickness of the elastic scraper blade (8) is gradually set along the length direction. The thickness at the front edge is 0.8-1.2mm, the thickness at the root is 3-5mm, and the edge is provided with a wear-resistant coating.

4. The apparatus according to claim 1, characterized in that, The inflation control unit (10) includes an air compressor, a diversion valve, two independent pressure reducing valves and an electromagnetic reversing valve. The diversion valve divides the compressed air in the air compressor into two paths, which are connected to the main pressurization airbag (4) and the auxiliary buffer airbag (6) through the pressure reducing valve and the electromagnetic reversing valve, respectively. The pressure reducing valve has a pressure feedback function, which can collect the pressure value in the airbag in real time and transmit it to the intelligent control component (11).

5. The apparatus according to claim 1, characterized in that, The intelligent control component (11) includes a controller, a pressure sensor and a speed sensor. The speed sensor is used to collect the real-time speed of the drive roller. The pressure sensor is electrically connected to the pressure reducing valve, the main pressurizing airbag (4) and the auxiliary buffer airbag (6) respectively. The controller automatically adjusts the inflation pressure of the main pressurizing airbag (4) and the auxiliary buffer airbag (6) according to the roller speed and the preset pressure threshold to achieve adaptive matching of the scraper pressure.

6. The apparatus according to claim 1, characterized in that, Both the main pressurizing airbag (4) and the auxiliary buffer airbag (6) are made of oil-resistant nitrile rubber. The surface of the airbag is provided with a scratch-resistant protective layer. The inflation stroke of the main pressurizing airbag (4) is 5-8mm, and the inflation stroke of the auxiliary buffer airbag (6) is 3-5mm. The working pressure range of both is 0.2-0.6MPa.

7. The apparatus according to claim 1, characterized in that, The scraper base (1) is provided with a waist-shaped adjustment hole, and the base shaft (2) can be adjusted up and down through the waist-shaped adjustment hole. The adjustment range is 0-10mm, which can be adapted to different installation heights and roller diameter requirements.

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