Constant-tension conveying control device for carbon fiber precursors

Abstract

The utility model 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 respectively, 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 utility model, the tension in a filament releasing process can be effectively controlled and is kept constant, so that a carbon fiber precursor filament bundle is heated more uniformly in a subsequent carbonization process, and the product quality is improved.

Description

Technical Field

[0001] The utility model 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 is finding widespread application in industries such as wind power, automotive, pressure vessels, and aerospace, driving a surge in demand. Against this backdrop, improving the stability of the payout mechanism during carbon fiber production is crucial, as it is a key factor in determining the production of high-performance carbon materials. However, existing payout mechanisms typically adjust the payout tension by adjusting the mass of the counterweight, a method that has limitations.

[0003] Adjusting the angle sensor to control payout tension by adjusting the counterweight mass often results in untimely tension adjustments. During carbon fiber production, the tension of the precursor yarn must be constantly adjusted to ensure stability and consistency during subsequent processing. However, adjusting the angle by adjusting the counterweight mass makes it difficult to achieve real-time and precise tension adjustments. This can lead to unstable performance of the carbon fiber product, affecting the quality of the final product.

[0004] Inconsistent tension across multiple strands of precursor yarn is another issue facing existing payoff devices. In practice, to improve production efficiency, multiple strands often need to be processed simultaneously. In such cases, using methods like adjusting the weight and angle to adjust payoff tension makes it difficult to ensure consistent tension across multiple strands. This inconsistent tension can lead to variations in the quality of the carbon fibers during subsequent processing, further impacting product quality. Utility Model Content

[0005] The utility model 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-mentioned purpose, the technical solution adopted by the present utility model is:

[0007] A carbon fiber precursor constant tension conveying control device, characterized in that it comprises a wire-releasing disk (5), wherein the front surface of the wire-releasing disk (5) is provided with a tension wheel (2) and a plurality of guide wheels, and an arc-shaped guide slot (17) is provided in the wire-releasing disk (5), wherein the guide wheels are respectively rotatably mounted on the front surface of the wire-releasing disk (5) via a wheel shaft, and the wheel shaft of the tension wheel (2) passes through the arc-shaped guide slot (17) and extends to the back surface of the wire-releasing disk (5);

[0008] The back of the wire-releasing 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-releasing disk (5) via a rotating shaft (16). The cylinder body end of the cylinder (10) is rotatably connected to the back of the wire-releasing disk (5). The piston rod end of the cylinder (10) is rotatably connected to one end of the tension arm (9). The wheel axle of the tension wheel (2) is connected to the other end of the tension arm (9).

[0009] Furthermore, the guide wire wheels on the front of the wire unwinding disc (5) include a first guide wire wheel (1) and a second guide wire wheel (3), wherein the second guide wire wheel (3) is positioned higher than the first guide wire wheel (1) and the tension wheel (2).

[0010] Furthermore, a comb-shaped positioning wire arm (4) is connected to the front of the wire release disc (5), and the positioning wire arm (4) is located below the first wire guide wheel (1).

[0011] Furthermore, an angular coding sensor (8) is mounted on the back of the wire unwinding 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).

[0012] In this utility model, the tension wheel and its axle can move along the arc-shaped guide slot. The rotation angle of the tension arm can be adjusted by a cylinder, and thus the position of the tension wheel can be adjusted, thereby achieving tension control during the conveying of carbon fiber precursor. The rotation angle of the tension arm can be detected by an angle encoding sensor.

[0013] Compared to existing technologies, the present invention effectively controls the tension of carbon fiber precursor tows during the unwinding process and maintains a constant tension. By utilizing a cylinder-driven tension adjustment angle control system, the present invention monitors and adjusts the tension during the unwinding process in real time, preventing deformation or breakage of the carbon fiber precursor tows due to excessive or insufficient tension. Furthermore, the present invention evenly widens the carbon fiber precursor tows by positioning the wire arms, ensuring more uniform heating during the subsequent carbonization process, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the structure of an embodiment of the utility model.

[0015] Figure 2 It is a rear view of the structure of an embodiment of the present utility model.

[0016] Figure 3 It is a left view of the structure of an embodiment of the utility model.

[0017] Figure 4 It is a right side view of the structure of an embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] 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-releasing disk 5, the front of which is provided with a tension wheel 2, a first wire guide wheel 1, a second wire guide wheel 3, and a positioning wire arm 4, and an arc-shaped guide groove 17 extending in a vertical arc shape is provided in the wire-releasing disk 5, and the arc-shaped guide groove 17 passes through the body of the wire-releasing disk 5 from front to back.

[0020] 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 position 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-shaped guide slot 17 is located to the right of the first wire guide wheel 1 and the second wire guide wheel 3. The lower end of the arc-shaped guide slot 17 is lower than the position of the first wire guide wheel 1, and the position of the second wire guide wheel 3 is higher than the position of the first wire guide wheel 1 and the upper end of the arc-shaped 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 extends 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-shaped guide slot 17. 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 as a whole along the arc-shaped guide slot 17.

[0021] A tension arm 9 and a cylinder 10 are provided on the back of the wire-releasing disk 5. The arm body of the tension arm 9 is parallel to the back of the wire-releasing disk 5, with a certain point of the arm body of the tension arm 9 as the rotation fulcrum. The rotation fulcrum position of the tension arm 9 is rotatably mounted 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 connection 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 slot 17 on the back of the wire-releasing disk 5. One end of the tension arm 9 is connected to the 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 to the lower right side of the back of the wire-releasing disk 5. The cylinder body end of the cylinder 10 is fixedly connected to a U-shaped piece, and the U-shaped piece is rotatably connected to the positioning bracket 11 through a second connecting shaft 13 axially perpendicular to the back of the wire-releasing disk 5, thereby making the cylinder body end of the cylinder 10 rotatably connected to the back of the wire-releasing disk 5. 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-releasing 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.

[0022] 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 is maintained at a constant force.

[0023] A first support 6 is also fixed to the back of the wire unwinding reel 5, spanning the rotational fulcrum of the tension arm 9. An angular encoder sensor 8 is mounted on the first support 6 via a sensor support 7. The angular rotation axis of the angular encoder sensor 8 is perpendicular to the back of the wire unwinding reel 5 and extends through the first support 6 toward the tension arm 9. The axial rear end of the tension arm 9's rotating shaft 16 extends through the tension arm 9 toward the angular rotation axis of the encoder sensor 8. The axial rear end of the rotating shaft 16 is coaxially fixedly connected to a tubular hole 14, and the angular rotation axis of the angular encoder sensor 8 is coaxially fixedly fixed in the tubular hole 14. This ensures that the angular rotation axis of the angular encoder sensor 8 and the rotating shaft 16 of the tension arm 9 are coaxially fixedly connected. When the tension arm 9 rotates, the angular encoder sensor 8 can detect the rotation angle of the tension arm 9.

[0024] In this embodiment, the positioning arm 4 is located below the first godet 1, which can evenly widen the carbon fiber precursor tow and make the carbon fiber precursor tow more evenly heated during the carbonization process, thereby improving product quality. This not only improves product quality but also increases production efficiency.

[0025] The back of the wire unwinding disc 5 is equipped with a cylinder 10. By adopting a tension control system that uses a cylinder to adjust the angle of control, the equipment can monitor and adjust the tension during the unwinding process in real time, avoiding deformation or breakage of the wire bundle caused by excessive or insufficient tension. Specifically, the key to achieving constant tension in the wire bundle, that is, the key to achieving constant pressure output from 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 cylinder 10 control circuit to adjust the air pressure flow, thereby precisely controlling the cylinder pressure and adjusting the angle to achieve constant tension on the wire bundle by the tension arm. To maintain a constant pressure output from the cylinder 10, the flow regulator of the electric proportional valve needs to be set to automatic control mode. In this way, during the operation of the cylinder, if 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 based on the pressure and flow requirements of the cylinder 10 to achieve the optimal pressure output effect.

[0026] In this embodiment, the cylinder 10 has a certain degree of freedom and will not become stuck when pushing the tension arm 9. The tension arm 9 can rotate about the rotation axis 16, and the angle encoder sensor 8 can detect the rotation angle of the tension arm 9. The cylinder's piston rod end 15 pushes the corresponding end of the tension arm 9 upward or downward, causing the tension arm 9 to rotate counterclockwise or clockwise about the rotation axis 16, ensuring stable tension in the tow during operation.

[0027] During operation, the carbon fiber precursor tow starts from the bottom and is guided by the positioning wire arm 4, ensuring that the tow is between the comb teeth of the positioning wire arm 4. The tow passes through the first wire guide wheel 1 in a counterclockwise direction, and then passes through the tension wheel 2 in a clockwise direction from top to bottom. The tow then passes through the second wire guide wheel 3 in a clockwise direction again, and finally enters the other carbonization process.

[0028] The preferred embodiments of the present invention are described in detail above with reference to 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 unless there is any contradiction. Such combinations, as long as they do not violate the concept of the present invention, should also be regarded as the contents disclosed in the present disclosure. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0029] The present invention is not limited to the specific details in the above-mentioned embodiments. Within 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 those skilled in the art should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A carbon fiber precursor constant tension conveying control device, characterized in that: The wire-releasing disk (5) comprises a tension wheel (2) and a plurality of guide wheels on the front 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 of the wire-releasing disk (5) through a wheel shaft, and the wheel shaft of the tension wheel (2) passes through the arc-shaped guide slot (17) and extends to the back of the wire-releasing disk (5); The back of the wire-releasing 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-releasing disk (5) via a rotating shaft (16). The cylinder body end of the cylinder (10) is rotatably connected to the back of the wire-releasing disk (5). The piston rod end of the cylinder (10) is rotatably connected to one end of the tension arm (9). 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 guide wheels on the front of the wire unwinding disc (5) include a first guide wheel (1) and a second guide wheel (3), wherein the second guide wheel (3) is positioned higher than the first 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 of the wire release disc (5) is also connected to a comb-shaped wire positioning arm (4), and the wire positioning arm (4) is located below the first wire guide wheel (1).

4. The carbon fiber precursor constant tension conveying control device according to claim 1, characterized in that: An angular coding sensor (8) is also installed on the back of the wire unwinding 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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