A fiber online shaving and anti-tangling roller device and method

Abstract

A fiber online shaving and anti-tangling roller device and method belong to the field of fiber drafting technology. The fiber online shaving and anti-tangling roller device includes a drafting roller group composed of multiple hollow rollers. The hollow rollers are provided with multiple guide positions at intervals along their axial direction. Each guide position is provided with a shaving position. A top yarn sensing mechanism is installed on the shaving position. A shaving mechanism for reciprocating shaving is provided inside the hollow rollers along their axial direction. The beneficial effects of this invention are that it can automatically handle the fiber tangling phenomenon without stopping the machine, improving the automation level of fiber production, ensuring the production cycle, and eliminating the need for manual handling, thus avoiding the risk of injury or death due to improper human operation.

Description

Technical Field

[0001] This invention relates to the field of fiber drawing technology, and in particular to a fiber online shaving anti-tangling roller device and method. Background Technology

[0002] Chemical fibers are fibers with textile properties made from natural or artificially synthesized polymers as raw materials, through processes such as preparing spinning solutions, spinning, and post-treatment. Generally, the process of preparing high-strength yarns includes a stretching process, and fiber stretching rollers are one of the commonly used instruments in the stretching process.

[0003] Currently used fiber stretching roller sets are generally seven-roll mills made of stainless steel. One or two rollers of the seven-roll mill have rubber pressure rollers added to fix the fibers and prevent slippage, which would lead to poor evenness and affect the overall fiber strength. However, during production, due to issues such as raw yarn quality, some fibers may break and become entangled on the stretching rollers under static electricity and adhesion. If not handled promptly, the entanglement will worsen, affecting the normal operation of surrounding yarn bundles and directly impacting the quality of the final product. Failure to address the entangled yarn bundles in a timely manner can adversely affect the production equipment and workshop environment, potentially causing fires, production line shutdowns, unnecessary economic losses, and even threatening the safety of operators.

[0004] For example, patent CN102534827A discloses a fiber spinning drawing roller, including a double-headed conical roller core (1) and a ceramic cylinder (4). The central part of the double-headed conical roller core (1) is a conical hole or a cylindrical hole with a keyway. The double-headed conical roller core (1) is connected to the output shaft of the drawing machine through the conical hole or the cylindrical hole. The characteristic is that the ceramic cylinder (4) is coaxial with the double-headed conical roller core (1), and the ceramic cylinder (4) is sleeved on the shoulder of the double-headed conical roller core (1). A connecting locking device is provided between the inner wall of the ceramic cylinder (4) and the double-headed conical surface of the double-headed conical roller core (1). The two ends of the double-headed conical roller core (1) and the ceramic cylinder (4) are locked together by the connecting locking device. This patent solution solves the problem of wear resistance and acid corrosion resistance of the drawing roller, but it still cannot solve the technical problem of how to automatically and efficiently cut and clean the fibers after they are wrapped around the roller, as proposed in the original patent. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a fiber online shaving anti-tangling roller device and method, which can automatically handle fiber tangling without stopping the machine, improving the automation level of fiber production, ensuring the production cycle, and eliminating the need for manual handling, thus avoiding the risk of injury or death due to improper human operation.

[0006] To achieve the above objectives, the technical solution adopted by the present invention to solve its technical problem is as follows: the fiber online shaving and anti-tangling roller device includes a drawing roller group composed of multiple hollow rollers, the hollow rollers are provided with multiple guide positions at intervals along their axial direction, each guide position is provided with a shaving position, the shaving position is equipped with a top yarn sensing mechanism, and the hollow rollers are provided with a reciprocating shaving mechanism along their axial direction.

[0007] The wire guide position includes an annular wire guide groove arranged circumferentially along the hollow roller. The hollow roller has a strip-shaped opening along its axial direction that communicates with its inner cavity. The wire cutting position is formed at the strip-shaped opening where the wire guide groove is located.

[0008] The top wire sensing mechanism includes pneumatic top rods installed on both sides of the strip-shaped opening where the guide wire groove is located. The pneumatic top rods are equipped with sensing components for sensing the fiber winding roller. An electrically controlled pressure relief valve is installed in the air passage of the pneumatic top rods. The sensing components are connected to the alarm unit, the wire cutting mechanism and the electrically controlled pressure relief valve through a PLC control unit.

[0009] The pneumatic push rod includes a cylinder mounted on the inner wall of the hollow roller and a piston rod disposed therein. One end of the piston rod extending out of the cylinder is fitted with a support head that makes smooth contact with the fiber bundle.

[0010] The sensing component includes a limit switch I mounted on the cylinder of the pneumatic push rod and a contact block mounted on the piston rod head of the pneumatic push rod. The limit switch I is arranged opposite to the contact block. The limit switch I is connected to the shredding mechanism, the alarm unit, and the electrically controlled pressure relief valve through a PLC control unit.

[0011] A negative pressure wire suction device is provided below or above the hollow roller. The sensing component is connected to the negative pressure wire suction device through a PLC control unit. The negative pressure wire suction device includes a wire suction cover installed below or above the hollow roller. The wire suction cover has a wire suction port on one side near the hollow roller that is opposite to the corresponding wire guide groove. The other side of the wire suction cover is connected to a negative pressure vacuum pump through a pipe.

[0012] The slicing mechanism includes a reciprocating moving mechanism fixed along the axial direction of the hollow roller and a slicing component guided and connected thereto. The reciprocating moving mechanism includes a transmission mechanism fixed along the axial direction of the hollow roller and a guide sliding component. One end of the slicing component is fixed to the transmission mechanism, and the other end of the slicing component is slidably connected to the guide sliding component.

[0013] The transmission mechanism is configured as a belt drive mechanism or a chain drive mechanism, and the guide sliding component includes two guide shafts fixed at both ends of the hollow roller; one guide shaft is provided with a limit switch II at both ends, and the two limit switches II are connected to the transmission mechanism through a PLC control unit to realize the reciprocating movement of the shredding component for shredding.

[0014] The slicing component includes a mounting base slidably connected to the guide sliding component. A slicing blade wheel is rotatably connected to the mounting base via a drive motor. During normal fiber stretching, the top end of the slicing blade wheel is located below the top end of the top fiber sensing mechanism.

[0015] A negative pressure wire suction device is provided below or above the hollow roller. The sensing component is connected to the negative pressure wire suction device through a PLC control unit. The negative pressure wire suction device includes a wire suction cover installed below or above the hollow roller. The wire suction cover has a wire suction port on one side near the hollow roller that is opposite to the corresponding wire guide groove. The other side of the wire suction cover is connected to a negative pressure vacuum pump through a pipe.

[0016] A method for using an online fiber cutting and anti-tangling roller device includes the following steps:

[0017] Step 1: The fiber bundle is guided and drawn on multiple hollow rollers;

[0018] Step 2: When the entanglement phenomenon occurs, the pneumatic push rod of the corresponding top wire sensing mechanism is pressed down and retracted. After sensing the entanglement action, the filament cutting mechanism moves back and forth along the axial direction of the hollow roller to automatically cut the fibers of the entangled roller. At the same time, the cut broken filaments are cleaned by negative pressure adsorption.

[0019] Step 3: After the shredding operation is completed, the pneumatic push rod of the top wire sensing mechanism is reset.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention designs the structure of each drafting roller in the drafting roller group as a hollow structure, with multiple guide positions on the roller surface. Each guide position has a cutting position, and a top yarn sensing mechanism is set at the cutting position. The cutting mechanism is set inside the drafting roller. When the top yarn sensing mechanism senses fiber entanglement on the roller, the cutting mechanism automatically moves back and forth along the axial direction of the drafting roller to perform the cutting operation. This can automatically handle the fiber entanglement phenomenon without stopping the machine, improving the automation level of fiber production, ensuring the production cycle, and eliminating the need for manual handling, thus avoiding the risk of injury or death due to improper human operation.

[0022] 2. The present invention also provides a negative pressure suction device above or below the hollow roller. When the filament cutting mechanism completes the filament cutting operation, the negative pressure suction device operates to suck up the cut broken filaments under negative pressure, avoiding the problem of the cut broken filaments wrapping around the roller again. Moreover, it effectively cleans the drafting roller group, ensures the quality of fiber drafting, and improves the fiber production environment. Attached Figure Description

[0023] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0024] Figure 1 This is a schematic diagram of the fiber online shaving and anti-tangling roller device of the present invention;

[0025] Figure 2 This is a front view of a single hollow roller in this invention;

[0026] Figure 3 This is a longitudinal sectional view of a single hollow roller in this invention;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0028] The markings in the above figures are as follows: 1. Hollow roller, 11. Inner cavity, 12. Guide groove, 13. Strip opening, 2. Top wire sensing mechanism, 21. Pneumatic top rod, 211. Cylinder, 212. Piston rod, 213. Support head, 22. Sensing component, 221. Limit switch I, 222. Contact block, 23. Electrically controlled pressure relief valve, 3. Shredding mechanism, 31. Transmission mechanism, 311. Transmission motor, 32. Guide sliding component, 321. Guide shaft, 322. Limit switch II, 33. Shredding component, 331. Mounting base, 332. Drive motor, 333. Shredding cutter wheel, 4. Negative pressure suction device, 41. Suction cover, 42. Suction port, 43. Pipe, 44. Negative pressure vacuum pump. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The specific implementation scheme of the present invention is as follows: Figures 1-4 As shown, this invention provides an online fiber cutting and anti-tangling roller device, comprising a drafting roller group composed of multiple hollow rollers 1. Each hollow roller 1 has multiple guide positions spaced apart along its axial direction, and each guide position has a cutting position. A top-feed sensing mechanism 2 is installed at the cutting position. A reciprocating cutting mechanism 3 is arranged inside the hollow roller 1 along its axial direction. The top-feed sensing mechanism 2 is connected to the cutting mechanism 3 through a PLC control unit. When fiber bundles become entangled with the rollers, the top-feed sensing mechanism 2 senses the fiber entanglement and is pressed down. The top-feed sensing mechanism 2 transmits a signal to the PLC control unit, which controls the cutting mechanism 3 to automatically reciprocate along the axial direction of the drafting rollers to perform the cutting operation. This automatically handles fiber entanglement without stopping the machine, improving the automation level of fiber production, ensuring the production cycle, and eliminating the risk of injury or death due to improper human operation by avoiding manual handling.

[0033] Specifically, the guide wire position includes an annular guide wire groove 12 arranged circumferentially along the hollow roller 1. Each guide wire groove 12 contains a certain amount of fiber bundle, realizing the directional stretching of the fiber bundle. The hollow roller 1 has a strip-shaped opening 13 along its axial direction that communicates with its inner cavity 11. The strip-shaped opening 13 where the guide wire groove 12 is located forms a cutting position, so that the cutting mechanism 3 can cut the fiber bundle wrapped around the roller at the cutting position during the reciprocating movement along the axial direction of the hollow roller 1.

[0034] Specifically, the top wire sensing mechanism 2 includes pneumatic top rods 21 installed on both sides of the strip opening 13 where the guide wire groove 12 is located. The pneumatic top rods 21 are equipped with sensing components 22 for sensing the fiber winding roller. An electrically controlled pressure relief valve 23 is installed in the air passage of the pneumatic top rods 21. The sensing components 22 are connected to the alarm unit, the wire cutting mechanism 3 and the electrically controlled pressure relief valve 23 through the PLC control unit. When the fiber bundle is wrapped around the roller, the pneumatic push rod 21 is squeezed. When the load-bearing capacity of the pneumatic push rod 21 is exceeded, it is pressed down, thereby triggering the sensing component 22. The sensing component 22 sends a signal of fiber wrapping to the PLC control unit. The PLC control unit controls the alarm unit to set up an audible and visual alarm to remind the operator that the fiber bundle is wrapped. At the same time, it controls the electrically controlled pressure relief valve 23 to release pressure, causing the pneumatic push rod 21 to retract. Then, it controls the filament cutting mechanism 3 to perform automatic filament cutting. After the pneumatic push rod 21 retracts, it prevents the fiber bundle wrapped around the roller from being cut by the filament cutting mechanism 3. The pressure decreases and the remaining fiber bundle is automatically lifted up, ensuring that the fiber bundle wrapped around the roller is completely cut.

[0035] The pneumatic push rod 21 is an existing structure, comprising a cylinder 211 mounted on the inner wall of the hollow roller 1 and a piston rod 212 disposed within it. The piston rod 212 includes a column and a plunger, with an air cushion inside the column. This air cushion is an elastic air bladder, typically made of rubber. The plunger is used to adjust the compression degree of the air column, changing the gas volume within the air cushion by moving up and down. A valve is also installed within the pneumatic push rod 21 to control the inflow and outflow of gas within the air cushion, thereby regulating and controlling the movement of the piston rod 212. When the piston rod 212 is compressed, the gas is compressed and stored within the air cushion. When the external force decreases or disappears, the gas within the air cushion is released, and the piston rod 212 automatically returns to its original position. It can automatically adjust according to external forces. When an electrically controlled pressure relief valve 23 is installed in the air passage of the pneumatic push rod 21, the gas in the air cushion can be released when the electrically controlled pressure relief valve 23 releases pressure, thereby causing the piston rod 212 to retract stably and ensuring the complete cutting of the fiber bundles of the winding roller.

[0036] The piston rod 212 extends out of the cylinder 211 and is equipped with a support head 213 that makes smooth contact with the fiber bundle. The support head 213 can be made of high-hardness rubber material to ensure the fiber stretching effect.

[0037] The sensing component 22 includes a limit switch I 221 mounted on the cylinder 211 of the pneumatic push rod 21 and a contact block 222 mounted on the head of the piston rod 212 of the pneumatic push rod 21. The limit switch I 221 and the contact block 222 are arranged opposite to each other. The limit switch I 221 is connected to the shredding mechanism 3, the alarm unit and the electrically controlled pressure relief valve 23 through the PLC control unit. When fiber entanglement occurs, i.e., multiple fiber bundles become entangled and overlapped, increasing the entanglement force and thus increasing the pressure on the piston rod 212 head of the pneumatic push rod 21. The piston rod 212 is compressed, and at this time, the contact block 222 touches the limit switch I 221, triggering the limit switch I 221. Simultaneously, the shaving blade wheel 333 on the shaving mechanism 3 contacts the fiber bundles entangled on the roller. The limit switch I 221 sends the entanglement signal to the PLC control unit. The PLC control unit controls the alarm unit to issue an audible and visual alarm to remind the operator of the entanglement. At the same time, it controls the electrically controlled pressure relief valve 23 to release pressure, causing the pneumatic push rod 21 to retract. Then, it controls the shaving mechanism 3 to reciprocate along the axial direction of the hollow roller 1 to cut the fiber bundles entangled on the roller.

[0038] Specifically, the slicing mechanism 3 includes a reciprocating moving mechanism fixed along the axial direction of the hollow roller 1 and a slicing component 33 guided and connected thereto. The reciprocating moving mechanism includes a transmission mechanism 31 fixed along the axial direction of the hollow roller 1 and a guide sliding component 32. The transmission mechanism 31 is configured as a belt drive mechanism 31 or a chain drive mechanism 31, driven to rotate by a drive motor 311. The guide sliding component 32 includes two guide shafts 321 fixed along the axial direction of the hollow shaft at both ends of the hollow roller 1. The slicing component 33 includes a mounting base 331 slidably connected to the two guide shafts 321. A slicing cutter wheel 333 is rotatably connected to the mounting base 331 via a drive motor 332. The bottom of the mounting base 331 is fixed to the conveyor belt or conveyor chain of the transmission mechanism 31, and the middle part of the mounting base 331 is slidably connected to the two guide shafts 321. The transmission mechanism 31 can drive the mounting base 331 to move axially along the two guide shafts 321, and at the same time drive the motor 332 to rotate the filament cutting wheel 333, thereby cutting the fiber bundle of the winding roller along the axial direction of the hollow roller 1. In addition, during the normal fiber stretching process, the top of the filament cutting wheel 333 is located below the top of the top of the top wire sensing mechanism 2, ensuring that during the filament cutting action, the normally stretched fiber bundle is located a distance above the filament cutting wheel 333, and will not be cut off. Only the fiber bundle of the winding roller (i.e., the fiber bundle in contact with the filament cutting wheel 333 or the fiber bundle that is squeezed by the pneumatic top rod 21 to retract its piston rod 212 and trigger the limit switch I 221) is cut off.

[0039] Furthermore, limit switches II 322 are respectively installed at both ends of one of the guide shafts 321. The two limit switches II 322 are connected to the transmission mechanism 31 through the PLC control unit to realize the reciprocating movement of the shredding component 33 for shredding. When the mounting base 331 moves along the axial direction of the two guide shafts 321 to contact one of the limit switches II 322 and trigger it, the PLC control unit controls the transmission motor 311 of the transmission mechanism 31 to reverse, thereby causing the mounting base 331 to move in the opposite direction until it contacts the other limit switch II 322 and triggers it, thus completing one shredding action. Since the electrically controlled pressure relief valve 23 is in a pressure relief state during the shredding operation, and the pneumatic push rod 21 retracts, the operator needs to observe on-site whether the reciprocating shredding operation completely cuts the fiber bundle of the winding roller. Once the operator confirms that the fiber bundles on the winding roller have been completely cut, the operator manually sends a control command to the PLC control unit via the host computer or control buttons. This causes the PLC control unit to stop the drive motor 311 of the transmission mechanism 31 from rotating, and then controls the electrically controlled pressure relief valve 23 to close, thereby controlling the retracted pneumatic push rods 21 in all the top wire sensing mechanisms 2 to extend and reset.

[0040] Specifically, a negative pressure suction device 4 is provided below or above the hollow roller 1. The aforementioned sensing component 22 is connected to the negative pressure suction device 4 through a PLC control unit. When fiber entanglement occurs, the PLC control unit controls the negative pressure suction device 4 to operate, so that the fiber bundles cut by the filament cutting mechanism 3 are attracted by negative pressure, which can effectively clean the roller surface of the hollow roller 1.

[0041] The negative pressure wire suction device 4 includes a wire suction cover 41 installed below or above the hollow roller 1. The wire suction cover 41 has a wire suction port 42 on one side near the hollow roller 1, corresponding to the wire guide groove 12. The other side of the wire suction cover 41 is connected to a negative pressure vacuum pump 44 via a pipe 43. The placement of the wire suction port 42 makes wire suction more precise. Multiple wire suction covers 41 at the hollow roller 1 can be connected via branch pipes to a main pipe, which in turn is connected to the negative pressure vacuum pump 44, allowing one negative pressure vacuum pump 44 to perform negative pressure wire suction cleaning on multiple hollow rollers 1.

[0042] The present invention also provides a method for using an online fiber cutting and anti-tangling roller, which includes the following steps:

[0043] Step 1: The fiber bundles are guided and pulled on multiple hollow rollers 1, so that a fixed amount of fiber bundles are located in each guide groove 12 of the hollow rollers 1.

[0044] Step 2: When the entanglement phenomenon occurs, the pneumatic push rod 21 of the corresponding top yarn sensing mechanism 2 is pressed down and retracted. After sensing the entanglement action, the filament cutting mechanism 3 moves back and forth along the axial direction of the hollow roller 1 to automatically cut the fibers of the entangled roller, and at the same time performs negative pressure adsorption to clean the cut broken filaments.

[0045] Specifically, when the phenomenon of roller entanglement occurs, that is, multiple bundles of fibers are wrapped and overlapped, the entanglement force becomes greater and greater, that is, the pressure on the head of the piston rod 212 of the pneumatic push rod 21 becomes greater and greater, and the piston rod 212 is compressed. At this time, the contact block 222 touches the limit switch I221 to trigger the limit switch I221, and at the same time, the filament cutting wheel 333 on the filament cutting mechanism 3, which is used for filament cutting, contacts the fiber bundles of the roller entanglement.

[0046] Limit switch I221 sends the roll wrapping signal to the PLC control unit. The PLC control unit controls the alarm unit to issue an audible and visual alarm to remind the staff that roll wrapping has occurred. At the same time, it controls the electric pressure relief valve 23 to release pressure, causing the pneumatic push rod 21 to retract. Then, it controls the drive motor 332 to rotate the shredder wheel 333. At the same time, it controls the transmission motor 311 to move, causing the transmission mechanism 31 to drive the mounting base 331 to move along the two guide shafts 321, so that the shredder wheel 333 rotates to cut the fiber bundles of the roll wrapping.

[0047] When the mounting base 331 contacts one of the limit switches II 322 and triggers it, the PLC control unit controls the drive motor 311 of the transmission mechanism 31 to reverse, thereby causing the mounting base 331 to move in the opposite direction until it contacts the other limit switch II 322 and triggers it, completing one shredding action. Because the electrically controlled pressure relief valve 23 is in a pressure-relieving state during the shredding operation, and the pneumatic push rod 21 retracts, the operator needs to observe on-site whether the reciprocating shredding operation completely cuts the fiber bundles on the winding roller.

[0048] Step 3: After the shredding operation is completed, the pneumatic push rod 21 in the top wire sensing mechanism 2 is reset.

[0049] Once the operator confirms that the fiber bundle on the winding roller has been completely cut, they manually operate the host computer or control buttons to send a control command to the PLC control unit. This causes the PLC control unit to stop the drive motor 311 of the transmission mechanism 31, thus completing the fiber cutting action. Then, the operator controls the electrically controlled pressure relief valve 23 to close, and controls all the retractable pneumatic push rods 21 in the top wire sensing mechanisms 2 to extend and reset. The cut fiber bundle is then manually pulled out and rewound onto the drafting roller assembly.

[0050] In summary, this invention can automatically handle the phenomenon of fiber entanglement on rollers without stopping the machine, thereby improving the automation level of fiber production, ensuring the production cycle, and eliminating the need for manual handling, thus avoiding the risk of injury or death due to improper human operation.

[0051] The above description is merely an illustration of some principles of the present invention. This specification is not intended to limit the present invention to the specific structures and applicable scope shown. Therefore, all possible modifications and equivalents that may be used fall within the scope of the patent application of this invention.

Claims

1. A fiber on-line godet untwisting device, characterized by, The device comprises a draft roller set composed of a plurality of hollow rollers, a plurality of guide wire positions are arranged along the axial direction of the hollow rollers, a wire cutting position is arranged on each guide wire position, a top wire sensing mechanism is arranged on the wire cutting position, a reciprocating wire cutting mechanism is arranged in the hollow roller along the axial direction of the hollow roller; The guide wire position comprises an annular guide wire groove arranged along the circumferential direction of the hollow roller, a strip-shaped opening is arranged along the axial direction of the hollow roller and is connected with the inner cavity of the hollow roller, and the wire cutting position is formed at the strip-shaped opening where the guide wire groove is arranged; The top wire sensing mechanism comprises pneumatic ejectors arranged on both sides of the strip-shaped opening where the guide wire groove is arranged, a sensing component for sensing the fiber winding is arranged on the pneumatic ejector, an electric control pressure relief valve is arranged in the gas circuit of the pneumatic ejector, and the sensing component is connected with an alarm unit, a wire cutting mechanism and the electric control pressure relief valve through a PLC control unit.

2. The fiber on-line godet anti-entangling device of claim 1, wherein: The pneumatic ejector comprises a cylinder body arranged on the inner wall of the hollow roller and a piston rod arranged in the cylinder body, and a support head in smooth contact with the fiber tow is arranged on the end of the piston rod extending out of the cylinder body.

3. The fiber on-line godet anti-entangling device of claim 1, wherein: The sensing component comprises a travel switch I arranged on the cylinder body of the pneumatic ejector and a contact block arranged on the head of the piston rod, the travel switch I is arranged opposite to the contact block, and the travel switch I is connected with the wire cutting mechanism, the alarm unit and the electric control pressure relief valve through the PLC control unit.

4. The fiber on-line godet anti-winding device according to any one of claims 1 to 3, characterized in that: The wire cutting mechanism comprises a reciprocating movement mechanism fixed along the axial direction of the hollow roller and a wire cutting component connected with the reciprocating movement mechanism, the reciprocating movement mechanism comprises a transmission mechanism fixed along the axial direction of the hollow roller and a guide sliding component, one end of the wire cutting component is fixed on the transmission mechanism, and the other end of the wire cutting component is connected with the guide sliding component in sliding mode.

5. The fiber on-line godet anti-entangling device of claim 4, wherein: The transmission mechanism is arranged as a belt transmission mechanism or a chain transmission mechanism, the guide sliding component comprises two guide shafts fixed on both ends of the hollow roller, travel switches II are arranged on both ends of one of the guide shafts, and the two travel switches II are connected with the transmission mechanism through a PLC control unit to realize the reciprocating wire cutting of the wire cutting component.

6. The fiber on-line godet anti-entangling device of claim 4, wherein: The wire cutting component comprises a mounting seat connected with the guide sliding component in sliding mode, and a wire cutting knife wheel is rotatably connected with the mounting seat through a driving motor, the top end of the wire cutting knife wheel is located below the top end of the top wire sensing mechanism in the process of normal fiber drafting.

7. The fiber on-line godet anti-entangling device of claim 1, wherein: A negative pressure tow suction device is arranged below or above the hollow roller, the sensing component is connected with the negative pressure tow suction device through a PLC control unit, the negative pressure tow suction device comprises a tow suction cover arranged below or above the hollow roller, a tow suction port opposite to the corresponding guide wire groove is arranged on the side of the tow suction cover close to the hollow roller, and the other side of the tow suction cover is connected with a negative pressure vacuum pump through a pipeline.

8. A method for preventing entanglement of cut fibers on-line by using the fiber on-line cut fiber anti-entanglement roller device according to any one of claims 1 to 7, characterized in that, The device comprises the following steps: Step 1: guiding and drafting the fiber tow on the plurality of hollow rollers; Step 2: when the winding occurs, the pneumatic ejector of the corresponding top wire sensing mechanism is pressed and retracted to sense the winding action, the wire cutting mechanism reciprocates along the axial direction of the hollow roller to automatically cut the fiber of the winding, and the cut broken wire is cleaned by negative pressure suction. Step 3: After the thread cutting operation is completed, the pneumatic ejector rod of the thread sensing mechanism is reset.

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