Constant-tension conveying control device for carbon fiber precursors

Abstract

The invention discloses a carbon fiber precursor constant tension conveying control device which comprises a yarn releasing disc, a tension wheel and a plurality of yarn guiding wheels are arranged on the front face of the yarn releasing disc, an arc-shaped guiding notch is formed in the yarn releasing disc, the yarn guiding wheels are rotationally installed on the front face of the yarn releasing disc, and a wheel shaft of the tension wheel penetrates through the arc-shaped guiding notch and extends to the back face of the yarn releasing disc. A tension arm and a cylinder are arranged on the back face of the pay-off reel, the tension arm is rotatably installed on the back face of the pay-off reel, the end of a cylinder body of the cylinder is rotatably connected to the back face of the pay-off reel, and the two ends of the tension arm are connected with the end of a piston rod of the cylinder and a wheel shaft of the tension wheel respectively. According to the device, the tension in the wire releasing process can be effectively controlled and kept constant, so that the carbon fiber precursor wire bundle is heated more uniformly in the subsequent carbonization process, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the field of carbon fiber precursor conveying tension regulating devices, in particular to a carbon fiber precursor constant tension conveying control device. Background Art

[0002] With the rapid development of the global carbon fiber industry, carbon fiber has been widely used in wind power, automobiles, pressure vessels, aerospace and other industrial fields, and the demand for it has increased sharply. In this context, it is particularly important to improve the stability of the fiber release device in the carbon fiber production process, because it is a key factor in determining whether high-performance carbon materials can be produced. However, the existing fiber release device uses the counterweight mass to adjust the tension of the fiber release, which has certain limitations.

[0003] Adjusting the weight mass to adjust the angle sensor to control the tension of the wire often leads to untimely tension adjustment. In the carbon fiber production process, the tension of the raw yarn needs to be adjusted at any time to ensure its stability and consistency in the subsequent processing. However, it is difficult to achieve real-time and accurate adjustment by adjusting the weight mass to adjust the angle control to achieve tension adjustment. This will lead to unstable performance of carbon fiber products and affect the quality of the final product.

[0004] Inconsistent tension of multiple strands of raw yarn is also a problem faced by existing fiber-releasing devices. In actual production, in order to improve production efficiency, it is often necessary to process multiple strands of raw yarn at the same time. At this time, if the tension of the fiber-releasing is adjusted by adjusting the weight mass and adjusting the angle control, it is difficult to ensure that the tension between multiple strands of raw yarn is consistent. Inconsistent tension will cause differences in the subsequent processing of carbon fiber, further affecting product quality. Summary of the invention

[0005] The invention provides a carbon fiber precursor constant tension conveying control device to solve the problem of inconsistent tension in the prior art when conveying carbon fiber precursor.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A carbon fiber precursor constant tension conveying control device, characterized in that it comprises a wire-releasing disk (5), wherein a tension wheel (2) and a plurality of guide wheels are provided on the front side of the wire-releasing disk (5), an arc-shaped guide slot (17) is provided in the wire-releasing disk (5), and the guide wheels are respectively rotatably mounted on the front side of the wire-releasing disk (5) via a wheel axle, and the wheel axle of the tension wheel (2) passes through the arc-shaped guide slot (17) and extends to the back side of the wire-releasing disk (5); The back of the wire release disk (5) is provided with a tension arm (9) and a cylinder (10); the arm body of the tension arm (9) is rotatably mounted on the back of the wire release disk (5) via a rotating shaft (16); the cylinder body end of the cylinder (10) is rotatably connected to the back of the wire release disk (5); the piston rod end of the cylinder (10) is rotatably connected to one end of the tension arm (9); and the wheel axle of the tension wheel (2) is connected to the other end of the tension arm (9).

[0007] Furthermore, the guide wire wheels on the front side of the wire release disc (5) include a first guide wire wheel (1) and a second guide wire wheel (3), wherein the second guide wire wheel (3) is located higher than the first guide wire wheel (1) and the tension wheel (2).

[0008] Furthermore, a comb-shaped wire positioning arm (4) is connected to the front of the wire release disc (5), and the wire positioning arm (4) is located below the first wire guide wheel (1).

[0009] Furthermore, an angle coding sensor (8) is mounted on the back of the wire release disc (5) via a first support (6), and the angle rotation axis of the angle coding sensor (8) is coaxially connected to the rotating shaft (16).

[0010] In the present invention, the tension wheel and its wheel shaft can move along the arc-shaped guide notch, and the rotation angle of the tension arm can be adjusted by the cylinder, thereby adjusting the position of the tension wheel, thereby realizing tension control when conveying carbon fiber precursor. The rotation angle of the tension arm can be detected by the angle encoding sensor.

[0011] Compared with the prior art, the present invention can effectively control the tension of the carbon fiber precursor tow during the unwinding process and keep the tension constant. By adopting a tension adjustment angle control system driven by a cylinder, the present invention can monitor and adjust the tension during the unwinding process in real time, avoiding deformation or breakage of the carbon fiber precursor tow due to excessive or insufficient tension. At the same time, the present invention can also evenly widen the carbon fiber precursor tow by positioning the wire arm, so that the carbon fiber precursor tow is heated more evenly in the subsequent carbonization process, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the structure of an embodiment of the present invention.

[0013] Figure 2 It is a rear view of the structure of an embodiment of the present invention.

[0014] Figure 3 It is a left view of the structure of an embodiment of the present invention.

[0015] Figure 4 It is a right view of the structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1-Figure 4 As shown, this embodiment discloses a constant tension conveying control device for carbon fiber precursor, including a vertically arranged rectangular wire unwinding disk 5, a tension wheel 2, a first wire guide wheel 1, a second wire guide wheel 3, and a positioning wire arm 4 are provided on the front of the wire unwinding disk, and an arc-shaped guide groove 17 extending in a circular arc shape in the vertical direction is provided in the wire unwinding disk 5, and the arc-shaped guide groove 17 passes through the body of the wire unwinding disk 5 front and back.

[0018] Among them, the first wire guide wheel 1 is installed at the upper right corner of the front of the wire release disk 5 by rotating the wheel axle axially perpendicular to the front of the wire release disk 5, and the second wire guide wheel 3 is installed at the top of the front of the wire release disk 5 by rotating the wheel axle axially perpendicular to the front of the wire release disk 5, and the second wire guide wheel 3 is located to the left of the first wire guide wheel 1. The arc guide slot 17 is located to the right between the first wire guide wheel 1 and the second wire guide wheel 3, the lower end of the arc guide slot 17 is lower than the first wire guide wheel 1, and the second wire guide wheel 3 is higher than the first wire guide wheel 1 and the upper end of the arc guide slot 17. One end of the positioning wire arm 4 is vertically connected to the front of the wire release disk 5, the positioning wire arm 4 is extended outward from the front of the wire release disk 5, and the positioning wire arm 4 is located as a whole below the first wire guide wheel 1 and to the right of the arc guide slot 17, and the arm body of the positioning wire arm 4 is vertically connected to a plurality of tooth rods to form a comb tooth structure. The axle of the tension wheel 2 is axially perpendicular to the front of the wire-releasing disk 5 , and the axle of the tension wheel 2 passes through the arc-shaped guide slot 17 and extends to the back of the wire-releasing disk 5 , so that the tension wheel 2 and its axle can move along the arc-shaped guide slot 17 as a whole.

[0019] A tension arm 9 and a cylinder 10 are provided on the back of the wire-releasing disk 5. The arm of the tension arm 9 is parallel to the back of the wire-releasing disk 5, and a certain point of the arm of the tension arm 9 is used as a rotation fulcrum. The rotation fulcrum of the tension arm 9 is rotatably installed on the back of the wire-releasing disk 5 through a rotating shaft 16 axially perpendicular to the back of the wire-releasing disk 5, and the center of the connecting position of the rotating shaft 16 on the back of the wire-releasing disk 5 coincides with the center of the groove surface of the arc-shaped guide notch 17 on the back of the wire-releasing disk 5, and one end of the tension arm 9 is connected to the wheel axle of the tension wheel 2. The cylinder body end of the cylinder 10 is at the bottom and the piston rod end is at the top. A positioning bracket 11 is fixed at the lower right side of the back of the wire release disk 5. The cylinder body end of the cylinder 10 is fixedly connected with a U-shaped part, and the U-shaped part is rotatably connected to the positioning bracket 11 through a second connecting shaft 13 axially perpendicular to the back of the wire release disk 5, thereby making the cylinder body end of the cylinder 10 rotatably connected to the back of the wire release disk 5, and the piston rod end 15 of the cylinder 10 is rotatably connected to the other end of the tension arm 9 through a first connecting shaft 12 axially perpendicular to the back of the wire release disk 5. In addition, the distance between the rotation fulcrum position of the tension arm 9 and the piston rod end of the cylinder 10 is smaller than the distance between the rotation fulcrum position of the tension arm 9 and the axle of the tension wheel 2.

[0020] Therefore, the cylinder 10 can drive the tension arm 9 to rotate on the back of the wire release disk 5, so that the tension wheel 2 and its wheel axle can move as a whole along the arc-shaped guide groove 17, thereby adjusting the position of the tension wheel 2 to produce different tensions on the carbon fiber precursor, and the position of the tension wheel 2 can be kept unchanged by fixing the cylinder 10, thereby ensuring that the tension remains constant.

[0021] The back of the wire release disk 5 is also fixed with a first support 6 that crosses the rotation fulcrum position of the tension arm 9. The first support 6 is installed with an angle coding sensor 8 through a sensor support 7. The angle rotation axis of the angle coding sensor 8 is perpendicular to the back of the wire release disk 5, and the angle rotation axis of the coding sensor 8 passes through the first support 6 and extends to the tension arm 9. The rear axial end of the rotating shaft 16 of the tension arm 9 passes through the tension arm 9 and extends to the angle rotation axis of the coding sensor 8, and the rear axial end of the rotating shaft 16 is coaxially fixedly connected with a pipe hole 14, and the angle rotation axis of the angle coding sensor 8 is coaxially fixed in the pipe hole 14, thereby making the angle rotation axis of the angle coding sensor 8 and the rotating shaft 16 of the tension arm 9 coaxially fixedly connected. When the tension arm 9 rotates, the rotation angle of the tension arm 9 can be detected by the angle coding sensor 8.

[0022] In this embodiment, the positioning wire arm 4 is located below the first wire guide wheel 1, which can make the carbon fiber precursor tow evenly widened, so that the carbon fiber precursor tow is heated more evenly during the carbonization process, thereby improving product quality. In this way, not only the product quality is improved, but also the production efficiency is improved.

[0023] The back of the wire release disk 5 is equipped with a cylinder 10. By adopting a tension control system that uses a cylinder to drive and adjust the angle control, the equipment can monitor and adjust the tension in the wire release process in real time to avoid deformation or breakage of the wire bundle caused by excessive or insufficient tension. Specifically, the key to achieving a constant tension of the wire bundle, that is, the key to achieving a constant pressure output of the cylinder 10, lies in the precise flow control of the electric proportional valve. In this embodiment, an electric proportional valve is installed at the inlet of the control circuit of the cylinder 10 to adjust the air pressure flow, thereby accurately controlling the cylinder pressure and adjusting the angle to achieve a constant tension generated by the tension arm on the wire bundle. In order to maintain a constant pressure output of the cylinder 10, the flow regulator of the electric proportional valve needs to be set to an automatic control mode. In this way, during the operation of the cylinder, once the system pressure changes, the electric proportional valve will automatically adjust the air pressure flow to ensure that the internal pressure of the cylinder 10 is stable at the set value. When setting the flow regulator of the electric proportional valve, it is necessary to make appropriate adjustments according to the pressure and flow requirements of the cylinder 10 to achieve the best pressure output effect.

[0024] In this embodiment, the cylinder 10 has a certain degree of freedom and will not get stuck due to pushing the tension arm 9. The tension arm 9 can rotate around the rotating shaft 16, and the angle encoding sensor 8 can detect the rotation angle of the tension arm 9. The corresponding end of the tension arm 9 is pushed upward or downward by the piston rod end 15 of the cylinder, and the tension arm 9 rotates counterclockwise or clockwise around the rotating shaft 16, so that the tow can maintain a stable tension during operation.

[0025] During operation, the carbon fiber raw yarn tow starts from the bottom and is guided by the positioning wire arm 4 to ensure that the tow is between the comb teeth of the positioning wire arm 4. The tow passes through the first wire guide wheel 1 upward in a counterclockwise direction, and then passes through the tension wheel 2 in a clockwise direction from top to bottom. Then, the tow passes through the second wire guide wheel 3 again in a clockwise direction, and finally enters other carbonization processes.

[0026] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0027] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A carbon fiber precursor constant tension conveying control device, characterized in that: The wire unwinding disc (5) comprises a tension wheel (2) and a plurality of guide wheels on the front of the wire unwinding disc (5); an arc-shaped guide slot (17) is provided in the wire unwinding disc (5); the guide wheels are rotatably mounted on the front of the wire unwinding disc (5) via a wheel axle; the wheel axle of the tension wheel (2) passes through the arc-shaped guide slot (17) and extends to the back of the wire unwinding disc (5); The back of the wire release disk (5) is provided with a tension arm (9) and a cylinder (10); the arm body of the tension arm (9) is rotatably mounted on the back of the wire release disk (5) via a rotating shaft (16); the cylinder body end of the cylinder (10) is rotatably connected to the back of the wire release disk (5); the piston rod end of the cylinder (10) is rotatably connected to one end of the tension arm (9); and the wheel axle of the tension wheel (2) is connected to the other end of the tension arm (9).

2. A carbon fiber precursor constant tension conveying control device according to claim 1, characterized in that: The wire guide wheels on the front side of the wire release disc (5) include a first wire guide wheel (1) and a second wire guide wheel (3), wherein the second wire guide wheel (3) is located higher than the first wire guide wheel (1) and the tension wheel (2).

3. A carbon fiber precursor constant tension conveying control device according to claim 2, characterized in that: The front side of the wire release disc (5) is also connected to a comb-tooth-shaped wire positioning arm (4), and the wire positioning arm (4) is located below the first wire guide wheel (1).

4. A carbon fiber precursor constant tension conveying control device according to claim 1, characterized in that: An angular coding sensor (8) is also mounted on the back of the wire release disc (5) via a first support (6), and the angular rotation axis of the angular coding sensor (8) is coaxially connected to the rotating shaft (16).

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