Silk withdrawing device and carbon fiber production system

Abstract

The utility model discloses a yarn withdrawing device and a carbon fiber production system, and belongs to the technical field of carbon fiber production devices. The wire withdrawing device comprises a rack, a wire withdrawing transmission mechanism and an emergency braking mechanism. The wire withdrawing transmission mechanism comprises a driving wheel, a driven wheel and a transmission belt connected between the driving wheel and the driven wheel, and the driving wheel and the driven wheel are rotatably connected to the rack. And the yarn withdrawing transmission mechanism is used for withdrawing the fiber precursor wound on the driven wheel. The emergency braking mechanism comprises a friction strip, the rack is provided with a first connecting position and a second connecting position which are located on the two radial sides of one end of the driven wheel, one end of the friction strip is connected with the first connecting position, and when the wire withdrawing transmission mechanism breaks down and needs to conduct emergency braking on the driven wheel, the other end of the friction strip can be connected with the second connecting position. The friction section in the middle of the friction strip is in friction contact with the driven wheel, and the friction force between the friction section and the driven wheel is utilized to reduce the rotating speed of the driven wheel and even stop the driven wheel from rotating.

Description

Technical Field

[0001] The present application relates to the technical field of carbon fiber production devices, and in particular to a fiber withdrawal device and a carbon fiber production system. Background Art

[0002] In the process of carbon fiber production, the fiber precursor needs to be de-filamented, then enter the pre-oxidation process of the fiber precursor, and then successively undergo low-temperature carbonization, high-temperature carbonization, surface treatment, and winding to produce carbon fiber.

[0003] However, the wire withdrawal transmission mechanism in the wire withdrawal device occasionally malfunctions, such as the driving wheel falling off, the belt breaking, etc., which may cause the original wire at the driven wheel to be over-tensioned, the original wire to be pulled apart, the original wire to collapse due to inertia acceleration, or the original wire to be entangled, which will cause a decrease in the yield rate, and in severe cases will cause large-scale wire breakage. Utility Model Content

[0004] Based on the above-mentioned deficiencies, the present application provides a wire withdrawal device and a carbon fiber production system to partially or completely improve the problem in the related art that the failure of the wire withdrawal transmission mechanism affects the wire withdrawal quality.

[0005] This application is implemented as follows:

[0006] In the first aspect, the example of the present application provides a wire withdrawal device, including a frame, a wire withdrawal transmission mechanism and an emergency braking mechanism; the wire withdrawal transmission mechanism includes a driving wheel, a driven wheel and a transmission belt connected between the driving wheel and the driven wheel; the driving wheel and the driven wheel are rotatably connected to the frame; the wire withdrawal transmission mechanism is used to withdraw the fiber raw wire wound around the driven wheel; the emergency braking mechanism includes a friction strip; the frame has a first connecting position and a second connecting position located on both radial sides of one end of the driven wheel, one end of the friction strip is connected to the first connecting position, and the other end of the friction strip can be selectively connected to the second connecting position, so that the friction section in the middle of the friction strip is in friction contact with the driven wheel.

[0007] In the above implementation process, the wire-retracting transmission mechanism includes a driving wheel and a driven wheel arranged on the frame, and the driven wheel and the driving wheel are connected by a belt transmission, and the rotation of the driving wheel can be used to drive the driven wheel to rotate, thereby retracting the fiber raw yarn wound at the driven wheel. When the wire-retracting transmission mechanism fails, such as the driving wheel falls off or the belt breaks, the mass of the fiber raw yarn at the driven wheel is large, and the driven wheel is easily rotated quickly under the action of inertia, which leads to excessive tension of the fiber raw yarn, breakage, accelerated rotation, collapse or entanglement. The wire withdrawal device provided in the example of the present application is provided with an emergency braking mechanism, one end of the friction strip is connected to the first connection position of the frame located on one side of one end of the driven wheel along the radial direction, and when the wire withdrawal transmission mechanism fails, the other end of the friction strip can be connected to the second connection position of the frame located on the other side of one end of the driven wheel along the radial direction, so that the friction section in the middle of the friction strip abuts against the driven wheel, and the friction force between the friction section and the driven wheel is used to reduce the rotation speed of the driven wheel or stop the driven wheel, thereby reducing the tension of the fiber raw yarn and reducing the influence of the wire withdrawal transmission mechanism on the fiber raw yarn withdrawal quality when the wire withdrawal transmission mechanism fails.

[0008] In combination with the first aspect, in an optional embodiment, the friction strip has a first connecting section and a second connecting section located at both ends of the friction section, the first connecting section is connected to the first connecting position, and the second connecting section is optionally connected to the second connecting position; the friction section is a rubber section.

[0009] In the above implementation process, a first connecting segment and a second connecting segment are set at both ends of the rubber friction segment. The first connecting segment can be connected to the first connecting position, and the second connecting segment can be connected to the second connecting position, so that the rubber friction segment abuts against the driven wheel to perform emergency braking on the driven wheel.

[0010] In combination with the first aspect, in an optional implementation, the first connecting section is provided with a spring.

[0011] In the above implementation process, a spring is arranged in the first connecting section. When the friction strip is used to perform emergency braking on the driven wheel, the spring can provide a buffering effect on the elastic section, thereby reducing the probability of the friction strip breaking due to excessive rotation speed of the driven wheel.

[0012] In combination with the first aspect, in an optional implementation, a connecting column is provided at the first connecting position, and a connecting hole is provided in the connecting column; a hook is provided at the end of the spring away from the friction section, and the hook is hung on the connecting hole.

[0013] In the above implementation process, a connecting column with a connecting hole is provided at the first connecting position, and a hook is provided at the end of the spring. The first connecting section can be connected to the first connecting position by combining the hook and the connecting hole.

[0014] In combination with the first aspect, in an optional implementation, the second connecting segment is a metal wire, one end of the metal wire is connected to the rubber segment, and the other end of the metal wire is connected to the second connecting position.

[0015] In the above implementation process, the second connecting section is set as a metal wire, and can be connected to the second connecting position by using the metal wire.

[0016] In combination with the first aspect, in an optional embodiment, the friction segment is located below the driven wheel along the direction of gravity; the emergency braking mechanism includes an adjusting member, the other end of the metal wire is connected to the second connecting position through the adjusting member, and the adjusting member is used to adjust the tension of the friction strip so that the rubber segment can selectively abut the driven wheel.

[0017] In the above implementation process, the metal wire is connected to the second connection position through the adjusting member. When the wire withdrawal transmission mechanism fails, the adjusting member can be used to adjust the tension of the friction strip so that the friction strip tends to be stretched until the rubber section abuts against the driven wheel, thereby performing emergency braking on the driven wheel. In the process of emergency braking of the driven wheel, the tension of the friction strip can also be adjusted in real time according to the change in the speed of the driven wheel. For example, when the speed of the driven wheel is too high, the tension of the friction strip is appropriately reduced to reduce the friction between the friction strip and the driven wheel and reduce the probability of breaking the friction strip; when the speed of the driven wheel is low, the tension of the friction strip is appropriately increased to increase the friction between the friction strip and the driven wheel and improve the braking efficiency.

[0018] Moreover, when the wire withdrawal transmission mechanism is working normally, the adjustment part can be used to loosen the friction strip. Since the friction section is located below the driven wheel along the direction of gravity, the rubber section in the middle of the relaxed friction strip will move downward along the direction of gravity, reducing the friction between the rubber section and the driven wheel until it disappears.

[0019] In combination with the first aspect, in an optional implementation, the adjusting member includes an adjusting wheel, the metal wire is wound around the adjusting wheel, and the adjusting wheel rotates along a preset direction to reel in the metal wire so that the rubber segment abuts against the driven wheel.

[0020] In the above implementation process, the metal wire is wound on the adjusting wheel. When the wire retracting transmission mechanism fails and the driven wheel needs to be braked urgently, the adjusting wheel can be rotated in a preset direction to reel the metal wire, so that the length of the metal wire between the first connection position and the second connection position becomes shorter, the tension of the friction strip increases, and the rubber segment moves upward toward the driven wheel in the direction against gravity and abuts against the driven wheel, and the friction between the rubber segment and the driven wheel is used to brake the driven wheel. In addition, during the braking process, the adjusting wheel can be used to adjust the degree of unwinding of the metal wire in real time, adjust the tension of the friction strip in real time, and then adjust the magnitude of the friction between the rubber segment and the driven wheel in real time, so as to reduce the probability of the friction strip breaking and improve the braking efficiency.

[0021] Similarly, when there is no need to brake the driven wheel, the adjusting wheel can be rotated in the opposite direction of the preset direction to unwind the metal wire, so that the length of the metal wire between the first connection position and the second connection position becomes longer, the tension of the friction strip is reduced, and the rubber segment moves downward in the direction of gravity and separates from the driven wheel.

[0022] In combination with the first aspect, in an optional embodiment, the adjusting member also includes a driving motor, which is connected to the adjusting wheel and is used to drive the adjusting wheel to rotate in a preset direction so that the rubber segment abuts against the driven wheel, or drive the adjusting wheel to rotate in the opposite direction of the preset direction so that the rubber segment moves away from the driven wheel.

[0023] In the above implementation process, the driving motor is used to drive the adjusting wheel to rotate, so that the winding and unwinding length of the metal wire can be adjusted more accurately, the tension of the friction strip can be adjusted, the probability of the friction strip being broken can be further reduced, and the braking efficiency can be improved. The driving motor is used to drive the adjusting wheel to rotate, and the operation is more convenient.

[0024] In combination with the first aspect, in an optional embodiment, the emergency braking mechanism also includes a speed sensor, which is connected to the drive motor signal; the speed sensor is used to detect the speed of the driven wheel, and sends a signal to the drive motor when the speed of the driven wheel exceeds a set value, and the drive motor drives the adjusting wheel to rotate in a preset direction to move the rubber segment away from the driven wheel.

[0025] In the above implementation process, the speed sensor is used to detect the speed of the driven wheel in real time. When the speed of the driven wheel exceeds the set value, the speed sensor sends a signal to the drive motor, and the drive motor receives the signal and automatically drives the adjustment wheel to rotate, so that the rubber section abuts against the driven wheel and brakes. By cooperating with the speed sensor and the drive motor, the driven wheel can be quickly and automatically braked when a failure occurs in the wire withdrawal transmission mechanism, further reducing the impact of the failure of the wire withdrawal transmission mechanism on the quality of the fiber raw yarn.

[0026] In the second aspect, the example of the present application provides a carbon fiber production system, including the wire withdrawal device provided in the first aspect, and a pre-oxidation furnace, a carbonization furnace, a surface treatment tank and a winder arranged in sequence at the rear end of the wire withdrawal device, so that the raw wire withdrawn by the wire withdrawal device passes through the pre-oxidation furnace, the carbonization furnace, the surface treatment tank and the winder in sequence.

[0027] In the above implementation process, the fiber production system uses the wire withdrawal transmission mechanism of the wire withdrawal device provided in the first aspect to withdraw the raw wire, so that the raw wire passes through the pre-oxidation furnace, carbonization furnace, surface treatment tank and winding machine in sequence, and the carbon fiber product can be obtained. An emergency braking mechanism is provided in the wire withdrawal device, and one end of the friction strip is connected to the first connection position of the frame located on one side of the driven wheel along the radial direction. When the wire withdrawal transmission mechanism fails, the other end of the friction strip can be connected to the second connection position of the frame located on the other side of the driven wheel along the radial direction, so that the friction section in the middle of the friction strip abuts against the driven wheel, and the friction between the friction section and the driven wheel is used to reduce the rotation speed of the driven wheel or stop the driven wheel, thereby reducing the tension of the fiber raw wire and the wire withdrawal movement speed, and reducing the influence of the wire withdrawal transmission mechanism on the fiber raw wire withdrawal quality when it fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0029] Figure 1 A schematic diagram of the connection of the wire withdrawal device provided for the example of this application;

[0030] Figure 2 A schematic diagram of a first working state of an emergency brake mechanism provided for an example of this application;

[0031] Figure 3 A schematic diagram of a second working state of the emergency brake mechanism provided for the example of this application;

[0032] Figure 4 A schematic plan view of a carbon fiber production system provided as an example of this application.

[0033] Icons: 100-fiber raw yarn; 1-wire withdrawal device; 10-frame; 11-first connection position; 12-second connection position; 13-connecting column; 20-wire withdrawal transmission mechanism; 21-driving wheel; 22-driven wheel; 23-transmission belt; 24-reel; 30-emergency braking mechanism; 31-friction strip; 311-friction section; 312-spring; 313-hook; 314-metal wire; 32-adjusting piece; 321-adjusting wheel; S1-clockwise direction; S2-counterclockwise direction; 200-carbon fiber production system; 2-pre-oxidation furnace; 3-carbonization furnace; 4-surface treatment tank; 5-winding machine. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "middle", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "bottom", and "inside" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0039] In the production process of carbon fiber, it is usually necessary to use a wire withdrawal rack to de-wire the fiber precursor 100, and then the de-wired fiber precursor 100 is sequentially passed through a pre-oxidation section, a low-temperature carbonization section, a high-temperature carbonization section, a surface treatment section and a winding section to produce a carbon fiber product.

[0040] Usually, a wire withdrawal transmission mechanism 20 is provided in the wire withdrawal frame, and the wire withdrawal transmission mechanism 20 is provided with a driving wheel 21, a driven wheel 22, and a transmission belt 23 connected between the driving wheel 21 and the driven wheel 22. The driving wheel 21 rotates, and the driven wheel 22 is driven to rotate through the transmission belt 23. The driven wheel 22 rotates to withdraw the fiber original wire 100 wound around the driven wheel 22.

[0041] However, during the process of withdrawing the fiber, the driving wheel 21 is prone to fall off or the transmission belt 23 is prone to break. After the driving wheel 21 falls off or the transmission belt 23 breaks, the mass of the fiber filament 100 at the driven wheel 22 is large, and the driven wheel 22 is prone to rotate rapidly under the action of inertia, which in turn increases the tension of the fiber filament 100 and even causes the fiber filament 100 to break, or the fiber filament 100 rotates rapidly to cause the edge to collapse or entangle, affecting the withdrawing quality of the fiber filament 100.

[0042] Therefore, the present application further improves the wire withdrawal device 1, so as to improve the influence of the failure of the wire withdrawal transmission mechanism 20 on the quality of the fiber precursor 100 to a certain extent. In order to make the purpose, technical solution and advantages of the embodiment of the present application clearer, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application.

[0043] See also Figure 1 The wire withdrawing device 1 includes a frame 10 , a wire withdrawing transmission mechanism 20 and an emergency braking mechanism 30 .

[0044] Please continue to read Figure 1 The wire withdrawal transmission mechanism 20 includes a driving wheel 21, a driven wheel 22 and a transmission belt 23 connected between the driving wheel 21 and the driven wheel 22. The driving wheel 21 and the driven wheel 22 are rotatably connected to the frame 10.

[0045] Please combine Figure 1 and Figure 2 The emergency brake mechanism 30 includes a friction strip 31. The frame 10 has a first connection position 11 and a second connection position 12 located at both radial sides of one end of the driven wheel 22. One end of the friction strip 31 is connected to the first connection position 11, and the other end of the friction strip 31 can be selectively connected to the second connection position 12, so that the friction section 311 in the middle of the friction strip 31 is in friction contact with the driven wheel 22.

[0046] One end of the friction strip 31 is connected to the frame 10 at a first connection position 11 located on one side of one end of the driven wheel 22 along the radial direction. When the wire withdrawal transmission mechanism 20 fails, the other end of the friction strip 31 can be connected to the frame 10 at a second connection position 12 located on the other side of one end of the driven wheel 22 along the radial direction, so that the friction section 311 in the middle of the friction strip 31 abuts against the driven wheel 22, and the friction force between the friction section 311 and the driven wheel 22 is used to reduce the rotation speed of the driven wheel 22 or stop the rotation of the driven wheel 22, thereby reducing the tension of the fiber original wire 100 and the wire withdrawal movement speed, so as to reduce the influence of the wire withdrawal transmission mechanism 20 on the wire withdrawal quality of the fiber original wire 100 when it fails.

[0047] The frame 10 is used to fix the wire withdrawal transmission mechanism 20 and the emergency brake mechanism 30. In some possible embodiments, the frame 10 has a first support seat rotatably connected to the driving wheel 21 and a second support seat rotatably connected to the driven wheel 22. The first support seat and the second support seat are spaced apart so that the driving wheel 21, the driven wheel 22 and the transmission belt 23 are supported and fixed between the first support seat and the second support seat.

[0048] In some possible embodiments, the first connection position 11 and the second connection position 12 may be located on two sides of the second support seat corresponding to the radial direction of the driven wheel 22 .

[0049] The wire-retracting transmission mechanism 20 is used to retract the fiber original wire 100 wound around the driven wheel 22 .

[0050] In some possible embodiments, the fiber withdrawal transmission mechanism 20 further includes a reel 24 that is transmission-connected to the driven wheel 22 , and the reel 24 moves along with the driven wheel 22 . The fiber precursor 100 is wound around the reel 24 .

[0051] The emergency brake mechanism 30 is used to perform emergency braking on the driven wheel 22 when a failure occurs in the wire withdrawal transmission mechanism 20 and causes the rotation speed of the driven wheel 22 to accelerate.

[0052] The friction section 311 in the middle of the friction strip 31 is used to abut against the driven wheel 22. The friction section 311 has good friction properties. When the friction section 311 contacts the driven wheel 22, a large friction resistance is generated, thereby reducing the rotation speed of the driven wheel 22 or stopping the driven wheel 22 from rotating.

[0053] In some possible embodiments, the material of the friction section 311 is selected from a rubber strip with a certain flexibility.

[0054] The friction strip 31 has a first connecting section and a second connecting section located at both ends of the friction section 311. When the driven wheel 22 needs to be braked, the first connecting section can be connected to the first connecting position 11 of the frame 10, and the second connecting section can be connected to the second connecting position 12 of the frame 10.

[0055] Furthermore, in some possible embodiments, an elastic buffer may be provided at the first connecting section.

[0056] The elastic buffer is arranged at the first connecting section, which can provide a buffering effect and reduce the probability of the friction strip 31 breaking due to the excessive rotation speed of the driven wheel 22.

[0057] Exemplarily, the elastic buffer may be a spring 312 .

[0058] Furthermore, in order to facilitate the connection between the rubber friction section 311 and the spring 312, in a possible embodiment, a pull ring can be set at one end of the spring 312, one end of the friction section 311 is passed through the pull ring, and then tied and fastened to the part of the friction section 311 that does not pass through the pull ring.

[0059] Further, in order to facilitate the connection between the first connection section and the first connection position 11, in some possible embodiments, a hook 313 may be provided at the end of the spring 312 away from the friction section 311. A connection column 13 is provided at the first connection position 11, and the connection column 13 is provided with a connection hole (not shown in the figure), and the hook 313 is hung in the connection hole.

[0060] Further, in a possible embodiment, a second connecting column may be provided at the second connecting position 12. A connecting hole is provided at the second connecting column, and the second connecting section may be fixed to the second connecting column through the second connecting hole.

[0061] Furthermore, the second connection section may be configured as a metal wire 314 , and the metal wire 314 is passed through the second connection hole to connect to the second connection position 12 .

[0062] For example, the metal wire 314 may be an iron wire or a steel wire.

[0063] Exemplarily, the metal wire 314 may be an iron wire with a diameter of 2 mm.

[0064] Furthermore, the metal wire 314 may have a certain length. When the driven wheel 22 needs to be braked, the metal wire 314 may be pulled to shorten the length of the portion of the metal wire 314 between the first connection position 11 and the second connection position 12, thereby increasing the tension of the friction strip 31 and making the friction strip 31 tend to be tightened. Since the first connection position 11 and the second connection position 12 are located on both sides of the driven wheel 22 in the radial direction, when the friction strip 31 tends to be tightened, the friction section 311 in the middle of the friction strip 31 will abut against the driven wheel 22, thereby limiting the rotation of the driven wheel 22.

[0065] When the friction strip 31 is used to perform emergency braking on the driven wheel 22, the speed of the driven wheel 22 will change from fast to slow. If the speed of the driven wheel 22 is fast, the tension of the friction strip 31 is large, and the friction between the friction section 311 and the driven wheel 22 is large, which can easily cause the friction strip 31 to break. Using the emergency braking mechanism 30 provided in the example of the present application, when the speed of the driven wheel 22 is fast, the metal wire 314 passing through the second connection hole can be retracted a certain distance, so that the length of the part of the metal wire 314 located between the first connection position 11 and the second connection position 12 is increased, the tension of the friction strip 31 is reduced, and the friction between the friction section 311 and the driven wheel 22 is reduced.

[0066] Furthermore, after the speed of the driven wheel 22 is reduced, in order to improve the braking efficiency, the metal wire 314 can be pulled again to shorten the length of the portion of the metal wire 314 located between the first connection position 11 and the second connection position 12, thereby increasing the tension of the friction strip 31 and increasing the friction force between the friction segment 311 and the driven wheel 22.

[0067] Furthermore, when emergency braking of the driven wheel 22 is not required, in order to prevent the friction section 311 in the friction strip 31 from contacting the driven wheel 22, in some possible embodiments, refer to Figure 1 The first connection position 11 and the second connection position 12 can be set on the left and right sides of the driven wheel 22, so that the friction section 311 in the friction strip 31 is located below the driven wheel 22 in the gravity direction.

[0068] Please continue reading Figure 3 When emergency braking of the driven wheel 22 is not required, the wire 314 can be loosened to increase the length of the wire 314 between the first connection position 11 and the second connection position 12, so that the friction section 311 moves downward along the direction of gravity until it is separated from the driven wheel 22.

[0069] See also Figure 3 When emergency braking is required, the metal wire 314 can be tightened to shorten the length of the metal wire 314 between the first connection position 11 and the second connection position 12, so that the friction section 311 moves upward in the opposite direction of gravity until it abuts against the driven wheel 22.

[0070] Furthermore, in order to facilitate the adjustment of the length of the metal wire 314 between the first connection position 11 and the second connection position 12 so as to adjust the contact between the friction strip 31 and the driven wheel 22, in some possible embodiments, the emergency braking mechanism 30 also includes an adjusting member 32, and the other end of the metal wire 314 is connected to the second connection position through the adjusting member 32.

[0071] The adjusting member 32 is used to adjust the tension of the friction strip 31 so that the friction segment 311 can selectively abut against the driven wheel 22 .

[0072] Further, in a possible embodiment, the adjusting member 32 includes an adjusting wheel 321 .

[0073] The metal wire 314 is wound around the adjusting wheel 321 , and the adjusting wheel 321 rotates along a preset direction to reel in the metal wire 314 , so that the friction section 311 abuts against the driven wheel 22 .

[0074] For example, please refer to Figure 2 The preset direction is the counterclockwise direction S2. The adjusting wheel 321 is rotated in the counterclockwise direction S2 so that the friction segment 311 abuts against the driven wheel 22.

[0075] For example, please refer to Figure 3 The opposite direction of the preset direction is the clockwise direction S1. The adjusting wheel 321 is rotated along the clockwise direction S1 to make the friction section 311 move away from the driven wheel 22.

[0076] Furthermore, in order to facilitate the rotation of the adjusting wheel 321, in some possible embodiments, the adjusting member 32 also includes a driving motor (not shown in the figure), which is connected to the adjusting wheel 321 and is used to drive the adjusting wheel 321 to rotate in the counterclockwise direction S2 so that the friction segment 311 abuts against the driven wheel 22, or to drive the adjusting wheel 321 to rotate in the clockwise direction S1 so that the friction segment 311 is away from the driven wheel 22.

[0077] Furthermore, in a possible embodiment, the emergency braking mechanism 30 also includes a speed sensor (not shown in the figure), which is connected to the drive motor signal; the speed sensor is used to detect the speed of the driven wheel 22, and sends a signal to the drive motor when the speed of the driven wheel 22 exceeds a set value, and the drive motor drives the adjusting wheel 321 to rotate so that the friction segment abuts the driven wheel 22.

[0078] Furthermore, the speed sensor can transmit the real-time speed of the driven wheel 22 to the processor, and the processor controls the direction and number of rotations of the drive motor. When the speed of the driven wheel 22 is relatively high, the drive motor is rotated a certain number of times in the clockwise direction S1 to reduce the friction between the friction segment 311 and the driven wheel 22; when the speed of the driven wheel 22 is relatively low, the drive motor is rotated a certain number of times in the counterclockwise direction S2 to increase the friction between the friction segment 311 and the driven wheel 22.

[0079] Exemplarily, the rotation speed sensor may be selected from a non-contact sensor.

[0080] For further information, see Figure 4 The present application example also provides a carbon fiber production system 200. The carbon fiber production system 200 includes a fiber withdrawal device 1, and a pre-oxidation furnace 2, a carbonization furnace 3, a surface treatment tank 4 and a winder 5 which are sequentially arranged at the rear end of the fiber withdrawal device 1, so that the raw fiber withdrawn from the fiber withdrawal device 1 passes through the pre-oxidation furnace 2, the carbonization furnace 3, the surface treatment tank 4 and the winder 5 in sequence.

[0081] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wire withdrawal device, characterized in that: include: frame; A wire-retracting transmission mechanism, the wire-retracting transmission mechanism comprising a driving wheel, a driven wheel and a transmission belt connected between the driving wheel and the driven wheel; the driving wheel and the driven wheel are rotatably connected to the frame; the wire-retracting transmission mechanism is used to retract the fiber raw yarn wound around the driven wheel; An emergency braking mechanism, the emergency braking mechanism includes a friction strip; the frame has a first connection position and a second connection position located on both radial sides of one end of the driven wheel, one end of the friction strip is connected to the first connection position, and the other end of the friction strip can be selectively connected to the second connection position, so that the friction section in the middle of the friction strip is in friction contact with the driven wheel.

2. The wire withdrawal device according to claim 1, characterized in that: The friction strip comprises a first connecting section and a second connecting section located at both ends of the friction section, the first connecting section is connected to the first connecting position, and the second connecting section can be selectively connected to the second connecting position; the friction section is a rubber section.

3. The wire withdrawal device according to claim 2, characterized in that: The first connecting section is provided with a spring.

4. The wire withdrawal device according to claim 3, characterized in that: The first connection position is provided with a connection column, and a connection hole is provided in the connection column; the end of the spring away from the friction section is provided with a hook, and the hook is hung on the connection hole.

5. The wire withdrawal device according to any one of claims 2 to 4, characterized in that: The second connecting section is a metal wire, one end of the metal wire is connected to the rubber section, and the other end of the metal wire is connected to the second connecting position.

6. The wire withdrawal device according to claim 5, characterized in that: The friction section is located below the driven wheel along the direction of gravity; the emergency braking mechanism includes an adjusting member, and the other end of the metal wire is connected to the second connecting position through the adjusting member, and the adjusting member is used to adjust the tension of the friction strip so that the rubber section can selectively abut the driven wheel.

7. The wire withdrawal device according to claim 6, characterized in that: The adjusting member comprises an adjusting wheel, the metal wire is wound around the adjusting wheel, and the adjusting wheel rotates along a preset direction to reel in the metal wire so that the rubber segment abuts against the driven wheel.

8. The wire withdrawal device according to claim 7, characterized in that: The adjusting member also includes a driving motor connected to the adjusting wheel, and configured to drive the adjusting wheel to rotate along the preset direction so that the rubber segment abuts against the driven wheel, or to drive the adjusting wheel to rotate in the opposite direction of the preset direction so that the rubber segment moves away from the driven wheel.

9. The wire withdrawal device according to claim 8, characterized in that: The emergency brake mechanism also includes a speed sensor, which is connected to the drive motor signal; the speed sensor is used to detect the speed of the driven wheel, and sends a signal to the drive motor when the speed of the driven wheel exceeds a set value, and the drive motor drives the adjusting wheel to rotate along the preset direction so that the rubber segment abuts against the driven wheel.

10. A carbon fiber production system, characterized in that: It comprises the wire withdrawing device as described in any one of claims 1 to 9, and a pre-oxidation furnace, a carbonization furnace, a surface treatment tank and a winder which are sequentially arranged at the rear end of the wire withdrawing device, so that the raw wire withdrawn by the wire withdrawing device passes through the pre-oxidation furnace, the carbonization furnace, the surface treatment tank and the winder in sequence.

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