Continuous production system for high-speed rotary jet spinning ceramic fibers

Abstract

The invention discloses a continuous production system for high-speed rotary jet spinning ceramic fibers, and relates to the technical field of ceramic fiber preparation. Comprising a rotary jet spinning machine, a first two-roller machine, a pretreatment heating furnace, a second two-roller machine, a medium-temperature calcining furnace, a third two-roller machine, a high-temperature crystal form conversion furnace, a fourth two-roller machine and a winding support which are sequentially arranged in the fiber conveying direction, a mechanical-thermal alternate treatment link of a fiber conveying path is formed, and the treatment link is connected through a conveying belt; a winding roller is arranged on the winding support, the winding roller, tension control roller speeds of the two-roller machines and temperature control systems of the heating furnaces are integrated on the same PLC control system, and real-time interlocking adjustment of the fiber conveying speed, the tension and the temperature gradient is achieved. The multi-section tension regulation and control area and the gradient heating furnace are alternately arranged, and the closed-loop transmission system and the PLC are cooperatively controlled, so that the fiber diameter, the crystal phase purity and the mechanical property are precisely regulated and controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic fiber preparation, and in particular to a continuous production system for high-speed rotary jet spinning of ceramic fibers, which is suitable for the industrial production of high-performance ceramic fibers such as zirconium oxide and silicon nitride. Background Art

[0002] The traditional ceramic fiber production process has the following defects: (1) Low production efficiency: intermittent production leads to frequent material turnover and insufficient equipment utilization; (2) Unstable fiber performance: poor diameter uniformity (CV value > 5%), insufficient crystal phase purity (< 95%), and significant high-temperature strength attenuation; (3) High energy consumption: calcination waste heat is not effectively recovered and waste gas treatment does not meet standards; (4) Low degree of automation: key parameters such as tension and temperature rely on manual adjustment and have low control accuracy. Existing equipment mostly uses segmented processing and lacks integrated coordinated control, resulting in unstable fiber quality and making it difficult to meet the demand for high-performance ceramic fibers in aerospace, nuclear energy and other fields. Therefore, there is an urgent need for an integrated, high-precision, low-energy continuous production equipment. Summary of the Invention

[0003] Technical problems to be solved: In response to the technical problems existing in the background technology, the present invention provides a production system for efficient and continuous production of ceramic fibers. Through the alternating layout of multi-section tension control zones and gradient heating furnaces, combined with the closed-loop transmission system and PLC collaborative control, precise control of fiber diameter (±0.3μm), crystal phase purity (β-silicon nitride ≥99.8%) and mechanical properties (tensile strength ≥2.0GPa) can be achieved, while reducing production costs by 35%, and annual production capacity reaches 10,000 tons.

[0004] Technical solution: The present invention relates to a continuous production system for high-speed rotary jet spinning of ceramic fibers, comprising a rotary jet spinning machine, a first two-roller mill, a pretreatment heating furnace, a second two-roller mill, a medium-temperature calcining furnace, a third two-roller mill, a high-temperature crystal conversion furnace, a fourth two-roller mill, and a winding support, which are sequentially arranged along the fiber conveying direction; The fiber output direction of the rotary jet spinning machine is aligned with the feed end of the first two-roller mill. The first two-roller mill, the second two-roller mill, the third two-roller mill, and the fourth two-roller mill are alternately connected in series with the pretreatment heating furnace, the medium-temperature calcining furnace, and the high-temperature crystal conversion furnace, respectively, to form a mechanical-thermal alternating treatment link for the fiber transmission path. The various devices in the processing chain are connected by a conveyor belt woven from high-temperature resistant ceramic fibers. The surface of the conveyor belt is composited with a silicon carbide wear-resistant coating with a thickness of 0.2-0.5 mm. It is embedded with a boron nitride thermal conductive fiber layer with a thermal conductivity coefficient of ≥50 W / (m·K) to maintain the temperature difference of the ceramic fibers within ≤±5°C during the conveying process. The winding bracket is provided with a winding roller, which is driven by a servo motor and integrated with the tension control roller speed of each two-roller machine and the temperature control system of each heating furnace into the same PLC control system, thereby realizing real-time interlocking adjustment of fiber transmission speed, tension and temperature gradient.

[0005] Preferably, the rotary jet spinning machine is equipped with an air compressor and a feeding mechanism; The rotary jet spinning machine comprises: The spinning support comprises a horizontally arranged support base and a vertically arranged support back frame in the middle of the support base, two X-guide beams are arranged in parallel on the support base, and a Y-guide beam is arranged on the support back frame; a mobile spinning platform, the mobile spinning platform being slidably connected to the X-guide beam and moving forward or backward along the X-guide beam; The lifting guide slide assembly includes two groups connected to the two ends of the Y-guide beam, each of which is connected to the side beam of the support frame, and the side beam is provided with a lifting drive mechanism that is transmission-connected to the lifting guide slide assembly on that side; the two lifting drive mechanisms drive the lifting guide slide assemblies to move up and down along the support frame, thereby driving the Y-guide beam to move up and down; The rotary spray head assembly is slidably connected to the Y guide beam and moves left and right along it; the rotary spray head of the rotary spray head assembly is connected to the air compressor and the feeding mechanism through the conveying pipeline 。

[0006] Preferably, the lifting drive mechanism includes a lifting drive motor and a lifting drive screw connected to the output end of the lifting drive motor; The lifting guide assembly includes a first mounting back plate and a second mounting back plate correspondingly arranged on the front and rear sides of the side beam of the support frame, and a third limiting guide wheel is respectively arranged between the four corners of the first mounting back plate and the second mounting back plate, and the third limiting guide wheel includes a connecting shaft connecting the first mounting back plate and the second mounting back plate, and a limiting wheel is set on the connecting shaft, and the limiting wheel is correspondingly clamped on the side beam of the support frame; The second mounting back plate is provided with a connecting angle seat, and the connecting angle seat is provided with a transmission thread sleeve which is sleeved on the lifting drive screw rod.

[0007] Preferably, a Y-direction drive motor is correspondingly provided on the first mounting back plate of one of the lifting guide slide assemblies, a drive pulley is provided at the output end of the Y-direction drive motor, and a plurality of pulley guide rollers are provided on the two sets of first mounting back plates respectively, and a second transmission belt arranged along the Y guide beam is sleeved between the drive pulleys and the pulley guide rollers; The rotary spray head assembly includes a rotary spray head mounting plate, a movable mounting back plate is provided on the back side of the rotary spray head mounting plate, second limiting guide wheels are provided at the four corners of the back side of the movable mounting back plate corresponding to the Y guide beam, and a second transmission block fixedly connected to the second transmission belt is provided at the center of the back side of the movable mounting back plate; The Y-direction driving motor drives the second transmission belt to move in a forward or reverse direction, thereby driving the rotary spray head assembly to move left and right along the Y-direction guide beam.

[0008] Preferably, a horizontal swing motor is provided at one end of the rotary spray head mounting plate, and a U-shaped mounting seat is rotatably connected to the other end thereof, and the horizontal swing motor is transmission-connected to the U-shaped mounting seat through a first transmission assembly, and drives the U-shaped mounting seat to rotate horizontally along the rotary spray head mounting plate; The open end of the U-shaped mounting seat is rotatably connected to a rotary spray head, and a pitch swing motor is provided on one side of the root of the U-shaped mounting seat. The output end of the pitch swing motor is provided with a transmission shaft that passes through the two side plates of the U-shaped mounting seat, and the other end of the transmission shaft is connected to the rotary spray head through a second transmission assembly. The pitch swing motor drives the transmission shaft and the second transmission assembly to move, and then drives the rotary spray head to perform a pitch rotation movement along the U-shaped mounting seat groove.

[0009] Preferably, the mobile spinning platform comprises a mounting base plate and a spinning plate arranged correspondingly above and below, and the spinning plate is connected to the mounting base plate via height adjustment components arranged at four corners; A first transmission block is provided at the center of the bottom of the mounting base plate, and a plurality of first position-limiting guide wheels are provided at the bottom of the mounting base plate corresponding to the X-guide beams; Motor mounting plates and positioning plates are correspondingly provided on the front and rear side beams of the support base. An X-direction drive motor is provided on the motor mounting plate. A first transmission belt is provided between the output end of the X-direction drive motor and the pulley guide roller provided on the positioning plate. The first transmission belt is fixedly connected to the first transmission block, driving the first transmission belt to rotate forward or reverse to drive the mobile spinning platform to move forward or backward along the X-direction guide beam.

[0010] Preferably, the first two-roller mill, the second two-roller mill, the third two-roller mill, and the fourth two-roller mill each include a two-roller mill bracket and two-roller mill side plates correspondingly arranged at both ends of the two-roller mill bracket, and the two two-roller mill side plates are respectively provided with mounting grooves along the height direction; A driving roller and a driven roller are arranged parallel to each other along the mounting groove between the two two-roller side plates. The conveyor belt passes between the driving roller and the driven roller. The roller body of the driving roller and the driven roller is made of tungsten carbide alloy, and its surface roughness Ra ≤ 0.8μm. The hydraulic cylinder at both ends of the driven roller is connected with the side plate of the two-roller machine, and the hydraulic cylinder is cooperatively provided with a displacement sensor and a servo valve; the roll gap between the driving roller and the driven roller is continuously adjusted by 5-50 mm through the hydraulic cylinder, and the pressure control accuracy of the hydraulic cylinder through the servo valve is ±0.05 MPa, and the response time is ≤30 ms; An infrared speed meter is arranged between adjacent driving rollers and driven rollers to ensure that the speed difference of the roller group is ≤±3%; A cavity is arranged in the roller body of the driving roller and the driven roller, and a thermocouple and a compressed air cooling nozzle are arranged in the cavity.

[0011] Preferably, the pretreatment heating furnace, the medium-temperature calcination furnace and the high-temperature crystal form conversion furnace each comprise two groups of tension roller groups and one group of detection roller groups arranged in correspondence with each other in the up-down direction along the conveying direction of the conveying belt, and a heating plate is arranged between adjacent tension roller groups and detection roller groups, and the heating plate heats the conveying belt. The pretreatment heating furnace is divided into three temperature zones, the first temperature zone is 150-200℃, the second temperature zone is 220-280℃, and the third temperature zone is 300-350℃, and the temperature difference between each zone is ≤30℃. The medium-temperature calcination furnace adopts gradient heating, the initial temperature is 600-650℃, the final temperature is 850-900℃, and the heating rate is ≤5℃ / min. The high-temperature crystal form conversion furnace is provided with a β crystal form conversion zone, the temperature in the furnace is kept constant at 1200-1400℃, and the oxygen partial pressure in the furnace is controlled at 10 -3 -10 -5 Pa.

[0012] Preferably, at least one end of each roller body of the tension roller group and the detection roller group is provided with a tension sensor in correspondence, and the end shaft of at least one roller body is provided with a hydraulic clutch in correspondence. At least one end of the tension roller group and the detection roller group is provided with a group of multi-wedge belt drive mechanisms in correspondence with the upper and lower roller bodies, the multi-wedge belt drive mechanism comprises a positioning pulley arranged on one side of one of the roller bodies of the tension roller group and the detection roller group in correspondence and away from each other, one adjusting hydraulic cylinder is arranged in correspondence between adjacent tension roller groups and between the tension roller group and the detection roller group, and the piston end of the adjusting hydraulic cylinder is connected with a floating pulley, the tensioning belt sequentially passes through the positioning pulley, the end shaft of each roller body of the tension roller group and the detection roller group on the same side, and the corresponding floating pulley to form a closed loop, and the adjusting hydraulic cylinder is controlled to act to adjust the distance between each roller group of the tension roller group and the detection roller group.

[0013] Preferably, the winding support comprises a first guide roller support, a second guide roller support and a winding roller support arranged in correspondence in a V-shaped structure along the moving direction of the conveying belt, the top ends of the first guide roller support and the second guide roller support are respectively connected with guide rollers, and the top end of the winding roller support is connected with a winding roller. The guide roller surface is provided with a spiral guide groove for eliminating fiber torsional stress, the guide groove depth is 0.5-1mm, and the pitch is 10-20mm; A winding line speed encoder is provided at one end of the winding roller frame. The winding line speed of the winding roller is 1-20 m / min, and forms a negative feedback regulation with the fiber shrinkage rate at the outlet of the high-temperature crystal conversion furnace; The surface of the winding roller is laser-etched with an array of anti-slip micro-pits, with a diameter of 0.1-0.3 mm and a density of 200-500 per cm².

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The present invention provides a production system for efficient and continuous production of ceramic fibers. It adopts an integrated and continuous design, integrating the entire process of spinning, calcining, and winding, and improving production efficiency by more than 50%. Through the alternating layout of multiple tension control zones and gradient heating furnaces, combined with a closed-loop transmission system and PLC collaborative control, precise control of fiber diameter (±0.3μm), crystal phase purity (β-silicon nitride ≥99.8%), and mechanical properties (tensile strength ≥2.0GPa) is achieved, while reducing production costs by 35% and energy consumption by 40%. A single nozzle has an output of 400-800g / h, with an annual production capacity of 10,000 tons. The system is suitable for aerospace thermal shielding, nuclear reactor linings, and ultra-high temperature filter devices. 2. The spin jet spinning machine's spin jet head uses a multi-hole nozzle array (aperture 0.1-0.3mm) and a supersonic airflow nozzle (pressure 0.8-1.5MPa) to achieve high-speed stretching of the molten ceramic precursor (fiber deposition rate 30-60m / s); the spin jet spinning machine's spin jet head assembly can conveniently adjust the spatial spinning position in the Z, Y and Z directions; 3. The four sets of two-roller mills are arranged in series to form a multi-level tension control zone. The hydraulic servo system dynamically adjusts the roller spacing (5-50mm) and roller speed (synchronization deviation ≤±3%) to eliminate the internal stress of the fiber. 4. The pretreatment heating furnace, medium-temperature calcining furnace and high-temperature crystal conversion furnace cooperate to form a gradient heat treatment system, which is equipped with a pretreatment heating furnace (150-350°C), a medium-temperature calcining furnace (600-900°C) and a high-temperature crystal conversion furnace (1200-1400°C) in sequence to achieve fiber removal, pre-crystallization and β-crystal conversion; 5. The system uses a high-temperature resistant ceramic fiber conveyor belt (with a composite silicon carbide coating on the surface) throughout the entire line, with a built-in boron nitride heat-conducting layer (thermal conductivity ≥ 50W / (m·K) to ensure temperature uniformity of ±5°C; 6. The system integrates a PLC control module and uses detection devices such as laser velocimeters and tension sensors to achieve real-time interlocking adjustment of fiber diameter (±0.3μm), tension (fluctuation ≤±1.5%) and temperature field (fluctuation ≤±10℃). BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the production system structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the mid-spin jet spinning machine from the first perspective; Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the mid-spin jet spinning machine from the second perspective; Figure 4 for Figure 3 A schematic diagram of the connection structure between the central lifting guide assembly and the support back frame from a first perspective; Figure 5 for Figure 4 A schematic diagram of the connection structure between the middle lifting guide assembly and the support back frame from a second perspective; Figure 6 for Figure 2 A schematic diagram of the structure of the mid-rotation nozzle assembly from the first perspective; Figure 7 for Figure 6 A schematic diagram of the structure of the mid-rotation nozzle assembly from a second perspective; Figure 8 for Figure 2 A schematic diagram of the first-person perspective structure of the China Mobile spinning platform; Figure 9 for Figure 8 Schematic diagram of the second perspective structure of the mobile spinning platform; Figure 10 for Figure 1 Schematic diagram of the internal structure of the two-roll mill; Figure 11 for Figure 10 Schematic diagram of part of the structure of the middle two-roll mill; Figure 12 for Figure 11 Schematic diagram of the internal structure of the active roller / driven roller; Figure 13 for Figure 1 Schematic diagram of the structure of the medium pretreatment heating furnace / medium temperature calcining furnace / high temperature crystal conversion furnace; Figure 14 for Figure 13 A schematic diagram of the structure of one side of the longitudinal section inside the middle furnace; Figure 15 for Figure 13 A schematic diagram of the structure of the other side of the longitudinal section in the middle furnace; Figure 16 for Figure 13 Schematic diagram of horizontal cross-section structure in the middle furnace; Figure 17 for Figure 1 Schematic diagram of the three-dimensional structure of the middle winding bracket; Figure 18 for Figure 17 Schematic diagram of the internal structure of the middle guide roller.

[0016] Reference numerals: 100. Production system; 1. Spinning machine; 11. Spinning bracket; 111. Support base; 112. Support back frame; 113. X-direction guide beam; 114. Y-direction guide beam; 12. Mobile spinning platform; 121. Motor mounting plate; 122. X-direction drive motor; 123. First transmission belt; 124. Mounting base; 125. Spinning table; 126. Positioning plate; 127. First transmission block; 128. First limiting guide wheel; 13. Spinning head assembly; 131. Spinning head mounting plate; 132. Horizontal swing motor; 133. First transmission assembly; 134. U-shaped mounting seat; 135. Pitch swing motor; 136. Transmission shaft; 137, second transmission assembly; 138, rotary nozzle; 139, movable mounting back plate; 1310, second transmission block; 1311, second limiting guide wheel; 14, lifting drive mechanism; 141, lifting drive motor; 142, lifting drive screw; 15, lifting guide assembly; 151, Y-axis drive motor; 152, first mounting back plate; 153, drive pulley; 154, pulley guide roller; 155, second transmission belt; 156, mounting back plate; 157, connecting angle seat; 158, transmission screw sleeve; 159, third limiting guide wheel; 1591, connecting shaft; 1592, limiting wheel; 2. Air compressor; 3. Feeding mechanism; 4. Conveyor belt; 5. First two-roller mill; 51. Two-roller mill bracket; 52. Two-roller mill side plate; 521. Mounting slot; 53. Active roller; 54. Driven roller; 55. Hydraulic cylinder; 56. Displacement sensor; 57. Thermocouple; 58. Compressed air cooling nozzle; 59. Servo valve; 6. Pretreatment heating furnace; 61. Tension roller group; 62. Detection roller group; 63. Tension sensor; 64. Waste gas incineration suction end; 65. VOC concentration sensor; 66. Hydraulic clutch; 67 , heating plate; 68, multi-V belt transmission mechanism; 681, positioning pulley; 682, tensioning belt; 683, adjusting hydraulic cylinder; 684, floating pulley; 7, second two-roller mill; 8, medium-temperature calcining furnace; 9, third two-roller mill; 10, high-temperature crystal conversion furnace; 16, fourth two-roller mill; 17, winding bracket; 171, first guide roller frame; 172, second guide roller frame; 173, winding roller frame; 18, guide roller; 181, spiral guide groove; 182, cooling water chamber; 19, winding roller; 20, winding line speed encoder. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following Figures 1-18The technical solutions of the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the present invention discloses a continuous production system for high-speed rotary jet spinning of ceramic fibers. The production system 100 includes a rotary jet spinning machine 1, a first two-roller machine 5, a pretreatment heating furnace 6, a second two-roller machine 7, a medium-temperature calcining furnace 8, a third two-roller machine 9, a high-temperature crystal form conversion furnace 10, a fourth two-roller machine 16 and a winding support 17, which are arranged in sequence along the fiber transmission direction; wherein, the fiber output direction of the rotary jet spinning machine 1 is aligned with the feed end of the first two-roller machine 5, and the first two-roller machine 5, the second two-roller machine 7, the third two-roller machine 9 and the fourth two-roller machine 16 are alternately connected in series with the pretreatment heating furnace 6, the medium-temperature calcining furnace 8 and the high-temperature crystal form conversion furnace 10, respectively, to form a mechanical-thermal alternating treatment link of the fiber transmission path. The various devices in the processing chain are connected by a conveyor belt 4 woven from high-temperature ceramic fibers. The conveyor belt's surface is coated with a wear-resistant silicon carbide coating with a thickness of 0.2-0.5 mm. Embedded within the conveyor belt is a layer of thermally conductive boron nitride fibers with a thermal conductivity of ≥50 W / (m·K) to maintain a temperature difference of ≤±5°C during the ceramic fiber conveyance process. A winding roller 19 is mounted on a reel support 17 and driven by a servo motor. This roller is integrated into a PLC control system with the tension-regulating roller speeds of the two-roller mills and the temperature control systems of the heating furnaces. This system enables real-time interlocking adjustment of fiber conveyance speed, tension, and temperature gradients.

[0019] like Figure 1-Figure 3As shown, the rotary jet spinning machine 1 is equipped with an air compressor 2 and a feeding mechanism 3. The rotary jet spinning machine 1 includes a spinning support 11, a mobile spinning platform 12, a lifting guide slide assembly 15 and a rotary jet head assembly 13. The spinning support 11 includes a horizontally arranged support base 111 and a support back frame 112 vertically arranged in the middle of the support base 111. Two X-guide beams 113 are arranged in parallel on the support base 111, and a Y-guide beam 114 is arranged on the support back frame 112. The spinning support 11 is made of steel or aluminum profiles. The mobile spinning platform 12 is slidably connected to the X-guide beam 113 and moves forward or backward along it. The lifting guide assembly 15 includes two groups connected to the two ends of the Y-guide beam 114. Each group of lifting guide assembly 15 is connected to the side beam of the support frame 112, and the side beam is provided with a lifting drive mechanism 14 that is transmission-connected to the lifting guide assembly 15 on that side. The two groups of lifting drive mechanisms 14 drive the lifting guide assembly 15 to move up and down along the support frame 112, and then drive the Y-guide beam 114 to move up and down. The jet nozzle assembly 13 is slidably connected to the Y-guide beam 114 and moves left and right along it. The jet nozzle 138 of the jet nozzle assembly 13 is connected to the air compressor 2 and the feeding mechanism 3 through the conveying pipeline. 。 The spinneret assembly 13 can realize relative movement in the X direction, Y direction and height direction (Z direction) of space by cooperating with the mobile spinning platform 12, the lifting guide slide assembly 15 and the lifting drive mechanism 14, thereby conveniently realizing the adjustment of the spinning position.

[0020] In a specific embodiment, if Figure 3-Figure 5 As shown, the lifting drive mechanism 14 includes a lifting drive motor 141 and a lifting drive screw 142 connected to the output end of the lifting drive motor 141. The lifting guide assembly 15 includes a first mounting back plate 152 and a second mounting back plate 156 correspondingly arranged on the front and rear sides of the side beam of the support back frame 112. A third limiting guide wheel 159 is respectively arranged between the four corners of the first mounting back plate 152 and the second mounting back plate 156. The third limiting guide wheel 159 includes a connecting shaft 1591 connecting the first mounting back plate 152 and the second mounting back plate 156. The connecting shaft 1591 is equipped with a limiting wheel 1592. The limiting wheel 1592 is correspondingly clamped on the side beam of the support back frame 112. The lifting guide assembly 15 of this structure can conveniently slide up and down along the side beam of the support back frame 112. A connecting angle seat 157 is provided on the second mounting back plate 156, and a transmission wire sleeve 158 is provided on the connecting angle seat 157, which is sleeved on the lifting drive screw 142. When the lifting drive motor 141 drives the lifting drive screw 142 to rotate, the lifting guide sliding assembly 15 can be driven to perform a lifting action along the Z direction through the transmission wire sleeve 158, thereby realizing the adjustment of the Y-guide beam 114 and the rotary nozzle assembly 13 connected thereto in the spatial height direction (Z direction) as a whole.

[0021] In a specific embodiment, if Figure 5-Figure 7 As shown, a Y-direction drive motor 151 is correspondingly provided on the first mounting back plate 152 of one lifting guide sliding assembly 15, and a driving pulley 153 is provided at the output end of the Y-direction drive motor 151, and multiple groups of pulley guide rollers 154 are respectively provided on the two groups of first mounting back plates 152. A second transmission belt 155 arranged along the Y-direction guide beam 114 is installed between the driving pulley 153 and the pulley guide roller 154, that is, the Y-direction drive motor 151 can drive the second transmission belt 155 to rotate forward or reverse in the Y-direction along the Y-direction guide beam 114 through the driving pulley 153. The rotary spray head assembly 13 includes a rotary spray head mounting plate 131, a movable mounting back plate 139 is provided on the back side of the rotary spray head mounting plate 131, and second limiting guide wheels 1311 are provided at the four corners of the back side of the movable mounting back plate 139 corresponding to the Y-direction guide beam 114, and a second transmission block 1310 fixedly connected to the second transmission belt 155 is provided in the center of the back side of the movable mounting back plate 139; the Y-direction drive motor 151 drives the second transmission belt 155 to move forward or reverse, thereby driving the rotary spray head assembly 13 to move left and right along the Y-direction guide beam 114.

[0022] In a specific embodiment, if Figure 6-Figure 7 As shown, a horizontal swing motor 132 is provided at one end of the rotary nozzle mounting plate 131, and the other end thereof is rotatably connected to a U-shaped mounting seat 134. The horizontal swing motor 132 is connected to the U-shaped mounting seat 134 through a first transmission assembly 133, and drives the U-shaped mounting seat 134 to rotate horizontally along the rotary nozzle mounting plate 131. The open end of the U-shaped mounting seat 134 is rotatably connected to a spinner head 138, and a pitch swing motor 135 is provided on one side of the root of the U-shaped mounting seat 134. The output end of the pitch swing motor 135 is provided with a transmission shaft 136 that passes through the two side plates of the U-shaped mounting seat 134, and the other end of the transmission shaft 136 is connected to the spinner head 138 through the second transmission assembly 137. The pitch swing motor 135 drives the transmission shaft 136 and the second transmission assembly 137 to move, and then drives the spinner head 138 to perform a pitch rotation movement along the groove of the U-shaped mounting seat 134. The spinner head 138 of this spinner head assembly 13 can be conveniently adjusted in the horizontal direction and pitch angle, thereby improving the adjustment range of the spinning injection direction of the spinner head 138. The spin jet nozzle 138 utilizes a multi-hole nozzle array (aperture 0.1-0.3 mm) and a supersonic airflow nozzle (pressure 0.8-1.5 MPa) to achieve high-speed stretching of the molten ceramic precursor (fiber deposition rate 30-60 m / s). It should be noted that the first transmission assembly 133 and the second transmission assembly 137 can utilize a transmission sprocket assembly, a transmission pulley assembly, or a transmission gear assembly to achieve their power transmission function.

[0023] In a specific embodiment, if Figure 8-Figure 9As shown, the mobile spinning platform 12 includes a mounting base 124 and a spinning plate 125, which are arranged in corresponding positions above and below. The spinning plate 125 is connected to the mounting base 124 via height adjustment assemblies at its four corners. The height adjustment assemblies can adjust the level of the spinning plate 125. A first transmission block 127 is provided at the center of the bottom of the mounting base 124. Furthermore, multiple sets of first position-limiting guide wheels 128 are provided at the bottom of the mounting base 124, corresponding to the X-guide beam 113. The arrangement of the multiple sets of first position-limiting guide wheels 128 is preferably determined to ensure that the X-guide beam 113 is clamped tightly, and this arrangement is not limited here. A motor mounting plate 121 and a positioning plate 126 are correspondingly provided on the front and rear side beams of the support base 111. An X-direction drive motor 122 is provided on the motor mounting plate 121. A first transmission belt 123 is provided between the output end of the X-direction drive motor 122 and the pulley guide roller provided on the positioning plate 126. The first transmission belt 123 is fixedly connected to the first transmission block 127, and the first transmission belt 123 is driven to rotate forward or reverse to drive the mobile spinning platform 12 to move forward or backward along the X-direction guide beam 113. The setting of the mobile spinning platform 12 can realize the X-direction position adjustment of the spinneret assembly 13 relative to the spinning table 125, and this embodiment is easier to implement.

[0024] like Figure 1 and Figure 10-11As shown, the first two-roller mill 5, the second two-roller mill 7, the third two-roller mill 9, and the fourth two-roller mill 16 each include a two-roller mill support 51 and two-roller mill side plates 52 disposed at either end of the two-roller mill support 51. Each of the two two-roller mill side plates 52 is provided with mounting slots 521 along its height. A driving roller 53 and a driven roller 54 are disposed parallel to each other along the mounting slots 521 between the two two-roller mill side plates 52. The conveyor belt passes between the driving roller 53 and the driven roller 54. The roller bodies of the driving roller 53 and the driven roller 54 are made of tungsten carbide alloy, with a surface roughness Ra ≤ 0.8 μm. Each end of the driven roller 54 is equipped with a hydraulic cylinder 55 connected to the two-roller mill side plate 52. The hydraulic cylinder 55 is equipped with a displacement sensor 56 and a servo valve 59. The hydraulic cylinder 55 has a built-in LVDT displacement sensor 56 with a measurement accuracy of ±0.01mm. It forms a closed-loop control with the servo valve 59, and the roller spacing adjustment resolution reaches 0.05mm. The roller spacing between the active roller 53 and the driven roller 54 is continuously adjusted by 5-50mm via the hydraulic cylinder 55. The pressure control accuracy of the hydraulic cylinder 55 through the servo valve 59 is ±0.05MPa, and the response time is ≤30ms. An infrared speed meter (not shown) is installed between adjacent active rollers 53 and driven rollers 54 to ensure that the roller group speed difference is ≤±3%. The active and passive rollers 53 and 54 are each provided with a cavity containing a thermocouple 57 and a compressed air cooling nozzle 58. The thermocouple 57 detects the roller temperature of the active and passive rollers 53 and 54. The compressed air cooling nozzle 58 is connected to an external compressed air cooling source. When the roller temperature exceeds a preset value, the compressed air cooling nozzle 58 sprays cold air onto the rollers to cool them down. The first, second, third, and fourth rollers 5, 7, 9, and 16 form a multi-stage tension control zone. These four sets of rollers are arranged in series and connected to a central PLC via a CAN bus for speed synchronization (deviation <0.05 m / s). A hydraulic servo system dynamically adjusts the roller spacing (5-50 mm) and roller speed (synchronization deviation ≤±3%) to eliminate internal stress in the ceramic fibers. It should be noted that the surfaces of the active and passive rollers 53 and 54 are coated with a silicon carbide wear-resistant layer, which is heat-resistant up to 1600°C.

[0025] like Figure 13-14As shown, the pretreatment heating furnace 6, the medium-temperature calcining furnace 8, and the high-temperature crystal conversion furnace 10 all include two sets of tension roller groups 61 and one set of detection roller groups 62, arranged in the upper and lower directions along the conveyor belt. Each set of tension roller groups 61 and detection roller groups 62 includes two roller bodies arranged in the upper and lower directions along the conveyor belt. The roller bodies are provided with roller shafts at both ends. The roller shafts are connected to the mounting holes provided vertically in the side walls of the furnace body to meet the requirements of adjusting the roller distance between the two corresponding roller bodies. A heating plate 67 is provided between adjacent tension roller groups 61 and detection roller groups 62. The heating element heating plate 67 of each heating furnace uses molybdenum-silicon alloy resistance wire with an adjustable power density range of 10-50W / cm². The heating plate 67 heats the conveyor belt 4, thereby heating the ceramic fiber layer. The pretreatment heating furnace 6 is divided into three temperature zones. The first zone is 150-200°C (water evaporation zone), the second zone is 220-280°C (organic matter pyrolysis zone), and the third zone is 300-350°C (residual carbon removal zone). The temperature difference between each zone is ≤30°C, which can remove more than 98% of the water and organic impurities in the ceramic fiber. The medium-temperature calcining furnace 8 adopts a gradient heating method, with an initial temperature of 600-650°C (pre-crystallization stage) and a final temperature of 850-900°C (inorganic skeleton solidification stage). The heating rate is ≤5°C / min to achieve preliminary sintering of the fiber network, and its density is increased to 85%-90%. A β-crystal conversion zone is provided in the high-temperature crystal conversion furnace 10. The temperature in the furnace is kept constant at 1200-1400°C, the insulation time is 30-120min, and an argon protective atmosphere (purity ≥99.999%) is introduced. The oxygen partial pressure in the furnace is controlled at 10 -3 -10 -5 Pa, promoting the transformation of amorphous quartz to β-cristobalite. The pretreatment heating furnace 6, medium-temperature calcining furnace 8, and high-temperature crystal conversion furnace 10 cooperate to form a gradient heat treatment system. The pretreatment heating furnace 6 (150-350°C), medium-temperature calcining furnace 8 (600-900°C), and high-temperature crystal conversion furnace 10 (1200-1400°C) are sequentially arranged to achieve fiber removal, pre-crystallization, and β-crystalline conversion.

[0026] In a preferred embodiment, if Figure 14 As shown, the high-temperature crystal conversion furnace 10 has a double-shell structure, with an outer stainless steel water-cooled jacket and an inner yttria-stabilized zirconia ceramic lining, measuring 50-100 mm thick. The uniform temperature zone within the furnace is ≥2 m long. A waste gas incineration extraction port 64 and a VOC concentration sensor 65 are installed at the top of the furnace shell. Exhaust gas or particulate matter generated during the heat treatment process can be extracted through the exhaust gas incineration extraction port 64 for heat recovery, achieving a calcination waste heat recovery efficiency of ≥70% and exhaust gas particulate matter emissions of <15 mg / m³.

[0027] In a specific embodiment, if Figure 14-16As shown, at least one end of each roller of the tension roller group 61 and the detection roller group 62 is provided with a tension sensor 63. The tension sensor 63 uses an optical fiber tension sensor 63 (range 0-1000N, accuracy ±0.3N) and a PID controller to dynamically adjust the ceramic fiber tension and maintain the fiber tension fluctuation ≤±1.5%; the tension sensor 63 is a three-roller floating detection structure; the surface of the detection roller is coated with a polyurethane elastic layer with a Shore hardness of 60-80A. At least one end shaft of the roller body is provided with a hydraulic clutch 66. The hydraulic clutch can control the rotation speed of the roller body through the roller shaft of the roller body. The tension control zone data is fed back to the drive system in real time. When fiber breakage or tension exceeding the limit is detected, the emergency brake response time is <0.1s; the hydraulic clutch cooperates with the multi-V belt transmission mechanism 68 to achieve stepless speed regulation with a transmission ratio of 1:1 to 1:5. At least one end of the tension roller group 61 and the detection roller group 62 is provided with a set of multi-V belt transmission mechanisms 68 corresponding to the upper and lower roller bodies, as shown Figure 15 As shown, the poly-V belt transmission mechanism 68 includes two groups of rollers corresponding to the upper and lower rollers of the tension roller group 61 and the detection roller group 62. The two groups of poly-V belt transmission mechanisms 68 can adjust the roller spacing between the upper and lower rollers. The poly-V belt transmission mechanism 68 includes a positioning pulley 681 corresponding to one side of the rollers of the tension roller group 61 and the detection roller group 62. An adjusting hydraulic cylinder 683 is respectively provided between adjacent tension roller groups 61 and between the tension roller group 61 and the detection roller group 62. The piston end of the adjusting hydraulic cylinder 683 is connected to a floating pulley 684. The tension belt 682 sequentially passes around the positioning pulley 681, each roller end shaft on the same side of the tension roller group 61 and the detection roller group 62, and the corresponding floating pulley 684 to form a closed loop. The action of the adjusting hydraulic cylinder 683 is controlled to adjust the spacing between each roller group of the tension roller group 61 and the detection roller group 62.

[0028] In a specific embodiment, if Figure 17-18As shown, the winding bracket 17 includes a first guide roller frame 171, a second guide roller frame 172 and a winding roller frame 173 which are arranged in a V-shaped structure along the moving direction of the conveyor belt. The top ends of the first guide roller frame 171 and the second guide roller frame 172 are respectively connected to guide rollers 18, and the top end of the winding roller frame 173 is connected to a winding roller 19. The conveyor belt passes through the upper side of the guide roller 18 of the first guide roller frame 171 and goes around the lower side of the guide roller 18 of the second guide roller frame 172, and then is wound on the winding roller 19 to form a roll. A spiral guide groove 181 is provided on the surface of the guide roller 18 to eliminate fiber torsional stress. The spiral guide groove 181 has an inclination angle of 15-30°, a guide groove depth of 0.5-1mm, and a pitch of 10-20mm. The bottom of the guide groove is provided with a PTFE wear-resistant coating with a friction coefficient of ≤0.15. The two ends of the guide roller 18 are floatingly mounted via butterfly springs, with an axial floating amount of ±1mm and a radial runout error of ≤0.02mm. A cooling water chamber 182 is provided inside the guide roller 18, the water temperature of which is controlled at 20-40°C and the flow rate is adjustable in the range of 5-20L / min. A winding speed encoder 20 is mounted at one end of the winding roller frame 173. The winding roller 19 is driven by a servo motor to adjust its speed. The winding speed of the winding roller 19 is 1-20 m / min, and is negatively regulated by the fiber shrinkage rate at the exit of the high-temperature crystal conversion furnace 10. The winding roller 19 is driven by a servo motor (torque accuracy ±1%) to form a constant tension winding system (preload force 20-100 N). The surface of the winding roller 19 is laser-etched with an array of anti-slip micro-pits with a diameter of 0.1-0.3 mm and a density of 200-500 pits / cm².

[0029] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A continuous production system for high-speed rotary jet spinning of ceramic fibers, characterized in that: The production system (100) comprises a rotary jet spinning machine (1), a first two-roller machine (5), a pretreatment heating furnace (6), a second two-roller machine (7), a medium-temperature calcining furnace (8), a third two-roller machine (9), a high-temperature crystal conversion furnace (10), a fourth two-roller machine (16), and a winding support (17) arranged in sequence along the fiber transmission direction; The fiber output direction of the rotary jet spinning machine (1) is aligned with the feed end of the first two-roller machine (5), and the first two-roller machine (5), the second two-roller machine (7), the third two-roller machine (9) and the fourth two-roller machine (16) are respectively connected in series with the pretreatment heating furnace (6), the medium-temperature calcining furnace (8) and the high-temperature crystal conversion furnace (10) to form a mechanical-thermal alternating treatment link of the fiber transmission path; The various devices of the processing chain are connected by a conveyor belt (4) woven from high-temperature resistant ceramic fibers. The surface of the conveyor belt (4) is composited with a silicon carbide wear-resistant coating with a thickness of 0.2-0.5 mm. A boron nitride heat-conducting fiber layer is embedded therein with a thermal conductivity coefficient of ≥50 W / (m•K) to maintain a temperature difference of ≤±5°C of the ceramic fibers during the conveying process. The winding support (17) is provided with a winding roller (19), which is driven by a servo motor and integrated with the tension control roller speed of each two-roller machine and the temperature control system of each heating furnace into the same PLC control system, thereby realizing real-time interlocking adjustment of fiber transmission speed, tension and temperature gradient.

2. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 1, characterized in that: The rotary jet spinning machine (1) is equipped with an air compressor (2) and a feeding mechanism (3); The rotary jet spinning machine (1) comprises: A spinning support (11), the spinning support (11) comprising a horizontally arranged support base (111) and a vertically arranged support back frame (112) in the middle of the support base (111), two X-guide beams (113) being arranged in parallel on the support base (111), and a Y-guide beam (114) being arranged on the support back frame (112); A mobile spinning platform (12), wherein the mobile spinning platform (12) is slidably connected to the X-guide beam (113) and moves forward or backward along the X-guide beam; The lifting guide slide assembly (15) includes two groups connected to both ends of the Y-guide beam (114), each group of the lifting guide slide assembly (15) is connected to the side beam of the support back frame (112), and the side beam is provided with a lifting drive mechanism (14) that is transmission-connected to the lifting guide slide assembly (15) on the side; the two groups of lifting drive mechanisms (14) drive the lifting guide slide assembly (15) to lift and slide along the support back frame (112), and then drive the Y-guide beam (114) to perform a lifting action; A rotary spray head assembly (13) is slidably connected to a Y-direction guide beam (114) and moves left and right along the Y-direction guide beam (114); the rotary spray head (138) of the rotary spray head assembly (13) is connected to an air compressor (2) and a feeding mechanism (3) through a delivery pipe. 。 3. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 2, characterized in that: The lifting drive mechanism (14) comprises a lifting drive motor (141) and a lifting drive screw (142) connected to the output end of the lifting drive motor (141); The lifting guide assembly (15) includes a first mounting back plate (152) and a second mounting back plate (156) which are respectively arranged on the front and rear sides of the side beam of the support back frame (112); a third limiting guide wheel (159) is respectively arranged between the four corners of the first mounting back plate (152) and the second mounting back plate (156); the third limiting guide wheel (159) includes a connecting shaft (1591) connecting the first mounting back plate (152) and the second mounting back plate (156); a limiting wheel (1592) is mounted on the connecting shaft (1591); and the limiting wheel (1592) is correspondingly mounted on the side beam of the support back frame (112); A connecting angle seat (157) is provided on the second mounting back plate (156), and a transmission thread sleeve (158) sleeved on the lifting drive screw rod (142) is provided on the connecting angle seat (157).

4. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 3, characterized in that: A Y-direction drive motor (151) is correspondingly provided on the first mounting back plate (152) of the lifting guide slide assembly (15); a driving pulley (153) is provided at the output end of the Y-direction drive motor (151); and a plurality of pulley guide rollers (154) are respectively provided on the two sets of first mounting back plates (152); a second transmission belt (155) is provided along the Y-direction guide beam (114) and is sleeved between the driving pulley (153) and the pulley guide rollers (154); The rotary spray head assembly (13) comprises a rotary spray head mounting plate (131), a movable mounting back plate (139) is provided on the back side of the rotary spray head mounting plate (131), second limiting guide wheels (1311) are provided at the four corners of the back side of the movable mounting back plate (139) corresponding to the Y-direction guide beam (114), and a second transmission block (1310) fixedly connected to the second transmission belt (155) is provided at the center of the back side of the movable mounting back plate (139); The Y-direction drive motor (151) drives the second transmission belt (155) to move in a forward or reverse direction, thereby driving the rotary spray head assembly (13) to move left and right along the Y-direction guide beam (114).

5. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 4, characterized in that: A horizontal swing motor (132) is provided at one end of the rotary spray head mounting plate (131), and a U-shaped mounting seat (134) is rotatably connected to the other end thereof. The horizontal swing motor (132) is transmission-connected to the U-shaped mounting seat (134) via a first transmission assembly (133), and drives the U-shaped mounting seat (134) to rotate horizontally along the rotary spray head mounting plate (131); The U-shaped mounting seat (134) is rotatably connected to the open end thereof with a rotary spray head (138), and a pitching swing motor (135) is provided at one side of the root of the U-shaped mounting seat (134). The output end of the pitching swing motor (135) is provided with a transmission shaft (136) that passes through the two side plates of the U-shaped mounting seat (134), and the other end of the transmission shaft (136) is transmission-connected to the rotary spray head (138) through a second transmission assembly (137). The pitching swing motor (135) drives the transmission shaft (136) and the second transmission assembly (137) to move, thereby driving the rotary spray head (138) to perform a pitching rotation movement along the groove of the U-shaped mounting seat (134).

6. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 1, characterized in that: The mobile spinning platform (12) comprises a mounting base plate (124) and a spinning plate (125) arranged correspondingly above and below, and the spinning plate (125) is connected to the mounting base plate (124) via height adjustment components arranged at four corners. A first transmission block (127) is provided at the center of the bottom of the mounting base plate (124), and a plurality of first position-limiting guide wheels (128) are provided at the bottom of the mounting base plate (124) corresponding to the X-direction guide beams (113). A motor mounting plate (121) and a positioning plate (126) are correspondingly provided on the front and rear side beams of the support base (111); an X-direction drive motor (122) is provided on the motor mounting plate (121); a first transmission belt (123) is provided between the output end of the X-direction drive motor (122) and the pulley guide roller provided on the positioning plate (126); the first transmission belt (123) is fixedly connected to the first transmission block (127); the first transmission belt (123) is driven to rotate in a forward or reverse direction to drive the mobile spinning platform (12) to move forward or backward along the X-direction guide beam (113).

7. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 1, characterized in that: The first two-roller machine (5), the second two-roller machine (7), the third two-roller machine (9), and the fourth two-roller machine (16) all include a two-roller machine bracket (51) and two-roller machine side plates (52) correspondingly arranged at both ends of the two-roller machine bracket (51), and the two two-roller machine side plates (52) are respectively provided with mounting grooves (521) along the height direction; A driving roller (53) and a driven roller (54) are arranged parallel to each other along the mounting groove (521) between the two two-roller side plates (52), and the conveyor belt (4) passes between the driving roller (53) and the driven roller (54); the roller body material of the driving roller (53) and the driven roller (54) is tungsten carbide alloy, and the surface roughness Ra is less than or equal to 0.8 μm; Both ends of the driven roller (54) are provided with hydraulic cylinders (55) connected to the two-roller mill side plates (52), and the hydraulic cylinders (55) are provided with displacement sensors (56) and servo valves (59). The roller spacing between the active roller (53) and the driven roller (54) is continuously adjusted by 5-50 mm through the hydraulic cylinders (55), and the pressure control accuracy of the hydraulic cylinders (55) through the servo valves (59) is ±0.05 MPa, and the response time is ≤30 ms. An infrared speed meter is provided between adjacent active rollers (53) and driven rollers (54) to ensure that the speed difference of the roller group is ≤±3%; A cavity is provided in the roller bodies of the active roller (53) and the driven roller (54), and a thermocouple (57) and a compressed air cooling nozzle (58) are provided in the cavity.

8. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 1, characterized in that: The pretreatment heating furnace (6), the medium-temperature calcining furnace (8) and the high-temperature crystal conversion furnace (10) all include two groups of tension roller groups (61) and one group of detection roller groups (62) correspondingly arranged in the upper and lower directions along the conveying direction of the conveyor belt, and heating plates (67) are respectively arranged between adjacent tension roller groups (61) and detection roller groups (62), and the heating plates (67) heat the conveyor belt (4); The pretreatment heating furnace (6) is divided into three temperature zones, the first zone is 150-200°C, the second zone is 220-280°C, and the third zone is 300-350°C, and the temperature difference between each zone is ≤30°C; The medium temperature calcining furnace (8) adopts a gradient heating method, with an initial temperature of 600-650°C, a final temperature of 850-900°C, and a heating rate of ≤5°C / min; The high-temperature crystal conversion furnace (10) is provided with a β crystal conversion zone, the temperature in the furnace is kept constant at 1200-1400°C, and the oxygen partial pressure in the furnace is controlled at 10 -3 -10 -5 Pa.

9. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 1, characterized in that: At least one end of each roller body of the tension roller group (61) and the detection roller group (62) is correspondingly provided with a tension sensor (63), and at least one end shaft of the roller body is correspondingly provided with a hydraulic clutch (66); At least one end of the tension roller group (61) and the detection roller group (62) is respectively provided with a group of multi-V belt transmission mechanisms (68) corresponding to the upper and lower roller bodies, and the multi-V belt transmission mechanism (68) includes a positioning pulley (681) corresponding to one side of the roller body of the tension roller group (61) and the detection roller group (62), and an adjusting hydraulic cylinder (683) is respectively provided between adjacent tension roller groups (61) and between the tension roller group (61) and the detection roller group (62), and the piston end of the adjusting hydraulic cylinder (683) is connected to a floating pulley (684), and the tensioning belt sequentially passes around the positioning pulley (681), each roller end shaft on the same side of the tension roller group (61) and the detection roller group (62), and the corresponding floating pulley (684) to form a closed loop, and the action of the adjusting hydraulic cylinder (683) is controlled to adjust the distance between each roller group of the tension roller group (61) and the detection roller group (62).

10. The continuous production system of high-speed rotary spray spinning ceramic fibers according to claim 1, characterized in that: The winding support (17) comprises a first guide roller frame (171), a second guide roller frame (172) and a winding roller frame (173) which are arranged in a V-shaped structure along the moving direction of the conveyor belt, wherein the top ends of the first guide roller frame (171) and the second guide roller frame (172) are respectively connected to guide rollers (18), and the top end of the winding roller frame (173) is connected to a winding roller (19); The surface of the guide roller (18) is provided with a spiral guide groove (181) for eliminating fiber torsional stress, the guide groove depth is 0.5-1mm, and the pitch is 10-20mm; A winding line speed encoder (20) is correspondingly provided at one end of the winding roller frame (173), and the winding line speed of the winding roller (19) is 1-20 m / min, and forms a negative feedback regulation with the fiber shrinkage rate at the outlet of the high-temperature crystal conversion furnace (10); The surface of the winding roller (19) is laser-etched with an anti-skid micro-pit array, wherein the micro-pit diameter is 0.1-0.3 mm and the density is 200-500 per cm².

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