Continuous fiber ammonia atmosphere heat treatment device and method

Abstract

The invention designs a continuous fiber ammonia gas atmosphere heat treatment device which comprises a heating device and a gas channel, and a fiber heating channel is arranged in the heating device; the two ends of the heating device are connected with liquid sealing devices respectively, each liquid sealing device comprises a liquid sealing channel and a sealing piece, liquid is arranged in the liquid sealing channels, the fibers penetrate through the liquid sealing channels, the sealing pieces are arranged in the liquid sealing channels, and the liquid submerges the lowest ends of the sealing pieces. A gap is formed between the lowest end of the sealing piece and the liquid sealing channel, and the fiber penetrates through the gap; the fibers penetrate through the gap between the lowest end of the sealing piece and the liquid sealing channel, heating and gas treatment are conducted in the fiber heating channel, the two sides of the heating device are sealed through the sealing piece and liquid, ammonia gas is prevented from flowing out, continuous fiber heat treatment can be achieved, meanwhile, full reaction of the ammonia gas and the fibers is achieved, and the service life of the fibers is prolonged. The quality and yield of fiber heat treatment are improved.

Description

Technical Field

[0001] This invention belongs to the field of fiber atmosphere heat treatment technology, and specifically relates to a continuous fiber ammonia atmosphere heat treatment apparatus and method. Background Technology

[0002] Some special ceramic fibers need to be heat-treated in an ammonia environment. Since ammonia is a toxic gas with a strong pungent odor, it is very harmful to the human body and can cause combustion and explosion when mixed with air. Current fiber heat treatment equipment generally uses a gas-sealed air curtain at the fiber inlet and outlet. This sealing method wastes a lot of gas and has poor sealing effect. It is easy to cause danger if heat treatment is carried out in an ammonia environment.

[0003] To address the sealing issue, during gas sealing, the entire fiber is wound onto a single tooling and then placed into a tube furnace, with both ends sealed with caps. This method cannot achieve continuous fiber processing without interruption, which greatly limits both product output and quality.

[0004] Therefore, this application develops a continuous fiber ammonia atmosphere heat treatment method, which can realize a continuous heat treatment process and achieve full reaction between ammonia gas and fiber, thereby improving the quality and yield of heat treatment. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous fiber ammonia atmosphere heat treatment apparatus and method, which can realize the continuous heat treatment process and achieve full reaction between ammonia gas and fiber, thereby improving the quality and yield of heat treatment.

[0006] This invention designs a continuous fiber ammonia atmosphere heat treatment device, including a heating device and a gas channel, wherein the heating device is provided with a fiber heating channel inside;

[0007] The heating device is connected to a liquid sealing device at both ends. The liquid sealing device includes a liquid sealing channel and a sealing element. Liquid is disposed in the liquid sealing channel. The fiber passes through the liquid sealing channel. The sealing element is disposed in the liquid sealing channel. The liquid covers the lowest end of the sealing element. A gap is provided between the lowest end of the sealing element and the liquid sealing channel. The fiber passes through the gap.

[0008] The gas channel is located between the liquid sealing device and the fiber heating channel, and the liquid sealing channel, gas channel, and fiber heating channel are connected in sequence.

[0009] Compared with the prior art, the beneficial effects of the present invention are that by sealing both ends of the heating device with a liquid sealing device, and by introducing ammonia gas into the sealed heating device through a gas channel, the fiber can be heated and gas-treated within the fiber heating channel of the heating device. By setting liquid in the liquid sealing channel and setting the sealing element within the liquid sealing channel, the fiber passes through the gap between the lowest end of the sealing element and the liquid sealing channel, and is heated and gas-treated within the fiber heating channel. By sealing both sides of the heating device with the sealing element and the liquid, ammonia gas is prevented from flowing out to the outside, enabling continuous fiber heat treatment and achieving a full reaction between ammonia gas and fiber, thereby improving the quality and yield of fiber heat treatment.

[0010] Furthermore, a positioning device is provided inside the liquid-sealed channel;

[0011] The positioning device includes positioning post one, positioning post two, and positioning post three, wherein positioning post one is disposed between the sealing element and the bottom wall of the liquid sealing channel;

[0012] Positioning pin two and positioning pin three are respectively located on both sides of the sealing element.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that: by positioning the fiber between the sealing element and the bottom wall of the liquid sealing channel through the positioning column, the fiber passes through the liquid between the sealing element and the bottom wall of the liquid sealing channel, which can not only allow the fiber to smoothly enter the fiber heating channel, but also seal both ends of the fiber heating channel.

[0014] By setting positioning posts two and three at both ends of the seal, the fiber bends into the liquid on one side of the seal and then cooperates with positioning post one to position the fiber, allowing the fiber to enter the liquid smoothly. After positioning post one and positioning post three cooperate, the fiber comes out of the liquid and bends on the other side of the seal before smoothly entering the fiber heating channel. At the same time, positioning posts one, two, and three can keep the fiber in a straight state inside the seal, preventing it from being loosely placed inside and affecting the fiber treatment effect.

[0015] Furthermore, the liquid sealing channel includes a straight channel and a groove, the groove being disposed on the lower side of the straight channel;

[0016] The seal is disposed within the groove, the liquid is disposed within the groove, and the seal is connected to a straight channel;

[0017] Preferably, the sealing element is a sealing plate, one end of which is connected to a channel, and the other end of which is disposed in the liquid.

[0018] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting a straight channel and a groove, the liquid is placed in the groove, the external air is isolated from the internal ammonia gas by the sealing plate and the liquid, and the fiber passing through the liquid sealing channel does not affect the sealing performance of the heating device.

[0019] Furthermore, the liquid sealing device is provided with an unwinding ratio regulator and a winding ratio regulator at its two ends away from the heating device, respectively. The unwinding ratio regulator includes a motor, and the output end of the motor is connected to an unwinding roller.

[0020] The winding ratio adjuster includes a second motor, and the output end of the second motor is provided with a winding roller.

[0021] Preferably, it also includes several tension sensors, which are pressed against the fiber clamping surface and are connected to a PLC control system;

[0022] The PLC control system is connected to motor one and motor two;

[0023] Preferably, the tension sensor is disposed between the liquid-sealed heating device and the take-up roller.

[0024] The beneficial effect of adopting the above-mentioned further technical solution is that the unwinding roller is driven by motor one to rotate, thereby unwinding the fiber, and the winding roller is driven by motor two to rotate, thereby winding the fiber, so that the fiber passes smoothly through the fiber heating channel.

[0025] The tension sensor presses down on the straightened fiber to detect its tension, which is then transmitted to the PLC control system. The PLC control system controls motor one and motor two to control the unwinding and winding of the fiber. The tension sensor is positioned between the liquid-sealed heating device and the winding roller to detect the straightened fiber.

[0026] Furthermore, a shrinkage compensation device is provided between the unwinding ratio adjuster and the liquid sealing device;

[0027] Preferably, the shrinkage compensation device includes a fixed seat and a pressing block. The fixed seat is connected to the liquid sealing device, and the pressing block is threadedly connected to or slidably held by the fixed seat. The pressing block is used to press the fibers.

[0028] The beneficial effect of adopting the above-mentioned further technical solution is that: by setting up a shrinkage compensation device, the shrinkage compensation device can compensate for the tension of the fiber. When the detected tension is too low, the pressing block can be rotated or slid to press the fiber, thereby increasing the tension of the fiber after stretching.

[0029] Furthermore, the heating device includes a heating tube, with heat-insulating bricks disposed on the outside of the heating tube, and the fiber heating channel disposed inside the heating tube.

[0030] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting a heating tube, the inside of the inner fiber heating channel is heated, thereby heating the fiber; by setting heat insulation bricks on the outside of the heating tube, the fiber heating channel is insulated, preventing heat loss and making the fiber heat treatment effect better.

[0031] Furthermore, the fiber heating channel is a quartz glass tube; a connecting sealing device is provided between the liquid sealing device and the quartz glass tube, one end of the connecting sealing device is sleeved on the outside of the quartz glass tube, and the other end of the connecting sealing device is connected to the liquid sealing device. The connecting sealing device is fixedly connected to the liquid sealing device, and a sealing rubber ring is provided between the quartz glass tube and the connecting sealing device; the connecting sealing device is connected to the fiber heating channel and the gas channel.

[0032] Preferably, the quartz glass tube is a straight tube; the connecting sealing device is a flange;

[0033] More preferably, the quartz glass tube is a spiral tube, and limit posts are respectively provided at the inlet and outlet of the spiral tube.

[0034] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by using a quartz glass tube as the fiber heating channel, friction between the fiber and the quartz glass tube can be avoided; by setting a connecting sealing device, the liquid sealing device and the quartz glass tube are sealed and connected, with one end of the quartz glass tube placed inside the connecting sealing device, and the quartz glass tube and the connecting sealing device are interference-fitted by a sealing rubber ring, thereby achieving a tight fit, avoiding the brittleness of the quartz glass tube and preventing gas leakage, and ensuring that the other end of the connecting sealing device is firmly connected to the liquid sealing device;

[0035] By using a straight quartz glass tube, the fiber can have more complete contact with the gas inside the heating device.

[0036] By using a spiral quartz glass tube, the surface area of ​​the fiber within the heating device can be increased, the length of the heating device can be shortened, and the heat treatment time can be reduced. By setting limiting posts at the inlet and outlet of the spiral tube, the fiber can be allowed to enter the spiral tube smoothly.

[0037] Furthermore, a support member is provided at the inflection point of the spiral tube, and the surface of the support member is provided with a groove;

[0038] Preferably, when the inflection point is above, the support is connected to the lower pipe wall of the inflection point, and when the inflection point is below, the support is connected to the upper pipe wall of the inflection point.

[0039] Preferably, the pipe diameter at the inflection point is smaller than the pipe diameter at the non-inflection point, the maximum pipe diameter is 90-110mm, and the pipe diameter at the inflection point is 10-90mm.

[0040] More preferably, the angle of the tube wall near the fiber at the inflection point is smaller than the angle of the tube wall away from the fiber at the inflection point, and the inflection point is a smooth plane.

[0041] The beneficial effects of adopting the above-mentioned further technical solution are as follows: By setting a support member at the inflection point of the spiral tube, and the support member having a groove, the groove limits the fiber and prevents the fiber from shifting; by setting the support member on the lower tube wall at the upper inflection point and the upper crank arm at the lower inflection point, the fiber is taut between the lowest and highest points of the inflection point, limiting the fiber's position within the spiral tube and preventing fiber shifting; by making the tube diameter at the inflection point smaller than the tube diameter at other parts, a diameter reduction is achieved; and by making the angle of the tube wall near the fiber at the inflection point smaller than the angle of the tube wall away from the fiber at the inflection point, the inflection point where the fiber contacts the tube wall can be limited, further preventing fiber shifting.

[0042] A continuous fiber ammonia atmosphere heat treatment method includes the following steps: S1: The fiber is wound on the unwinding ratio regulator, and one end of the wound fiber is passed through the liquid, gas, and fiber heating channels, and then through the liquid again and connected to the winding ratio regulator.

[0043] S2: Turn on the heating device and simultaneously introduce ammonia gas into the gas channel;

[0044] S3: Based on the data detected by the tension sensor, the PLC system controls the rotation speed of motor one and motor two.

[0045] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the fiber is unwound by the unwinding ratio regulator, the fiber passes through the liquid and enters the gas channel, then enters the fiber heating channel, and finally winds onto the winding ratio regulator. The heating device is turned on and ammonia is introduced into the gas channel. The fiber undergoes heating and gas treatment in the heating channel. At the same time, the liquid on the fiber surface evaporates during the heating process. The tension data of the fiber is detected by the tension sensor and transmitted to the PLC system. The PLC system controls the rotation speed of motor one and motor two based on the detected tension data, thereby controlling the winding and unwinding speed of the fiber, and thus controlling the fiber tension. Then, the fiber after heat treatment and gas treatment is wound up by the winding ratio regulator.

[0046] Furthermore, the heating temperature is 900℃-1200℃, and the ammonia flow rate is 0.5㎡ / h-0.7㎡ / h;

[0047] The fiber travel speed is 0.8m / h-1.2m / h;

[0048] The liquid is liquid wax.

[0049] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by heating at a temperature of 900℃-1200℃ and ammonia flow rate of 0.5㎡ / h-0.7㎡ / h, the fiber can be subjected to heat treatment and gas treatment; by using a fiber speed of 0.8m / h-1.2m / h, the fiber can be slowly and fully heat-treated and gas-treated in the heating channel; and by using liquid wax, the fiber's performance can be preserved under heat treatment and ammonia treatment conditions, while also being able to volatilize rapidly during the heat treatment process. Attached Figure Description

[0050] Figure 1 Schematic diagram of a continuous fiber ammonia atmosphere heat treatment device Figure 1 ;

[0051] Figure 2 Schematic diagram of a continuous fiber ammonia atmosphere heat treatment device Figure 2 ;

[0052] Figure 3 Schematic diagram of a continuous fiber ammonia atmosphere heat treatment device Figure 3 ;

[0053] Figure 4 Schematic diagram of a continuous fiber ammonia atmosphere heat treatment device Figure 4 ;

[0054] Figure 5 This is a schematic diagram of a liquid sealing device;

[0055] Figure 6 This is a schematic diagram of the shrinkage compensation device.

[0056] 1. Heating device; 11. Fiber heating channel; 111. Support component; 112. Groove; 113. Limiting post; 12. Heating tube; 13. Insulating brick; 2. Liquid sealing device; 21. Liquid sealing channel; 211. Liquid; 212. Straight channel; 213. Groove; 22. Sealing component; 23. Positioning device; 231. Positioning post one; 232. Positioning post two; 233. Positioning post three; 3. Gas channel; 4. Fiber; 5. Unwinding ratio adjuster; 51. Motor one; 52. Unwinding roller; 6. Rewinding ratio adjuster; 61. Motor two; 62. Rewinding roller; 7. Shrinkage compensation device; 71. Fixed seat; 72. Pressing block; 8. Connecting sealing device; 81. Sealing rubber ring; 9. Tension sensor. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0058] Example 1:

[0059] A fiber heating atmosphere heat treatment device includes a heating device 1 and a gas channel 3. The heating device 1 has a fiber heating channel 11 inside. A liquid sealing device 2 is connected to both ends of the heating device 1. The liquid sealing device 2 includes a liquid sealing channel 21 and a sealing element 22. Liquid 211 is disposed within the liquid sealing channel 21, through which the fiber 4 passes. The sealing element 22 is disposed within the liquid sealing channel 21, with the liquid 211 covering the lowest point of the sealing element 22. A gap is formed between the lowest point of the sealing element 22 and the liquid sealing channel 21, through which the fiber 4 passes. A gas channel 3 is disposed between the liquid sealing device 2 and the fiber heating channel 11. The liquid sealing channel 21, gas channel 3, and fiber... Heating channels 11 are connected in sequence; the two ends of heating device 1 are sealed by liquid sealing device 2, and ammonia gas is introduced into the sealed heating device 1 through gas channel 3, so that fiber 4 can be heated and gas-treated in fiber heating channel 11 of heating device 1. By setting liquid 211 in liquid sealing channel 21 and sealing element 22 in liquid sealing channel 21, fiber 4 passes through the gap between the lowest end of sealing element 22 and liquid sealing channel 21, and is heated and gas-treated in fiber heating channel 11. The sealing element 22 and liquid 211 seal both sides of heating device 1 to prevent ammonia gas from flowing to the outside, so as to realize continuous heat treatment of fiber 4, and at the same time realize the full reaction of ammonia gas and fiber 4, thereby improving the quality and yield of fiber 4 heat treatment.

[0060] A positioning device 23 is provided inside the liquid sealing channel 21. The positioning device 23 includes a first positioning post 231, a second positioning post 232, and a third positioning post 233. The first positioning post 231 is disposed between the sealing element 22 and the bottom wall of the liquid sealing channel 21. The second positioning post 232 and the third positioning post 233 are respectively disposed on both sides of the sealing element 22. The fiber 4 is positioned between the sealing element 22 and the bottom wall of the liquid sealing channel 21 by the first positioning post 231, so that the fiber 4 passes through the liquid 211 between the sealing element 22 and the bottom wall of the liquid sealing channel 21. This allows the fiber 4 to smoothly enter the fiber heating channel 11 and also seals both ends of the fiber heating channel 11. By providing positioning posts 232 and 233 at both ends of the sealing element 22, the fiber 4 is positioned by turning into the liquid 211 on one side of the sealing element 22 and cooperating with positioning post 231, allowing the fiber 4 to enter the liquid 211 smoothly. After the positioning posts 231 and 233 cooperate, the fiber 4 exits from the liquid 211 and turns into the fiber heating channel 11 on the other side of the sealing element 22. At the same time, positioning posts 231, 232, and 233 ensure that the fiber 4 is in a straightened state inside the sealing element 22, preventing it from being loosely placed inside and affecting the processing effect of the fiber 4.

[0061] The liquid sealing channel 21 includes a straight channel 212 and a groove 213, with the groove 213 located on the lower side of the straight channel 212. The sealing element 22 is located within the groove 213, and the liquid 211 is located within the groove 213. The sealing element 22 is connected to the straight channel 212. Preferably, the sealing element 22 is a sealing plate, with one end connected to the straight channel 212 and the other end located within the liquid 211. By setting the straight channel 212 and the groove 213, the liquid 211 is contained within the groove 213. The sealing plate and the liquid 211 isolate the external air from the internal ammonia gas, and allow the fiber 4 to pass through the liquid sealing channel 21 without affecting the sealing performance of the heating device 1.

[0062] The liquid sealing device 2 is equipped with an unwinding ratio regulator 5 and a winding ratio regulator 6 at its two ends furthest from the heating device 1. The unwinding ratio regulator 5 includes a first motor 51, the output of which is connected to an unwinding roller 52. The winding ratio regulator 6 includes a second motor 61, the output of which is connected to a winding roller 62. Preferably, it also includes several tension sensors 9, which are pressed against the fiber 4 and connected to a PLC control system. The PLC control system is connected to the first motor 51 and the second motor 61. More preferably, the tension sensors 9 are located at the liquid sealing device 2 and the heating device 1. Between the take-up rollers 62; the unwind roller 52 is driven to rotate by motor 1 51, thereby unwinding the fiber 4, and the take-up roller 62 is driven to rotate by motor 2 61, thereby winding the fiber 4, so that the fiber 4 passes smoothly through the fiber heating channel 11; the tension sensor 9 presses the straightened fiber 4 to detect the tension of the fiber 4, and transmits the detected tension to the PLC control system, which controls motor 1 51 and motor 2 61 to control the unwinding and winding of the fiber 4; the tension sensor 9 is set between the liquid sealing device 2 and the take-up roller 62, so that the sensor can detect the straightened fiber 4.

[0063] A shrinkage compensation device 7 is provided between the unwinding ratio adjuster 5 and the liquid sealing device 2; preferably, the shrinkage compensation device 7 includes a fixed base 71 and a pressing block 72. The fixed base 71 is connected to the liquid sealing device 2, and the pressing block 72 is threadedly connected to the fixed base 71 or slidably locked. The pressing block 72 is used to press the fiber 4. By providing the shrinkage compensation device 7, the shrinkage compensation device 7 can compensate for the tension of the fiber 4. When the detected tension is too low, the pressing block 72 can be rotated or slid to press the fiber 4, thereby increasing the tension of the fiber 4 after stretching.

[0064] The heating device 1 includes a heating tube 12, with an insulating brick 13 disposed on the outside of the heating tube 12, and the fiber heating channel 11 disposed inside the heating tube 12. By setting the heating tube 12, the inside of the inner fiber heating channel 11 is heated, thereby heating the fiber 4. By setting the insulating brick 13 on the outside of the heating tube 12, the fiber heating channel 11 is kept warm, preventing heat loss and improving the heat treatment effect of the fiber 4.

[0065] The fiber heating channel 11 is a quartz glass tube; preferably, the quartz glass tube is a straight tube; by making the fiber heating channel 11 a quartz glass tube, friction between the fiber 4 and the quartz glass tube can be avoided; by making the quartz glass tube a straight tube, the fiber 4 can have more sufficient contact with the gas in the heating device 1.

[0066] A connecting sealing device 8 is provided between the liquid sealing device 2 and the quartz glass tube. One end of the connecting sealing device 8 is sleeved on the outside of the quartz glass tube, and the other end of the connecting sealing device 8 is connected to the liquid sealing device 2. The connecting sealing device 8 is fixedly connected to the liquid sealing device 2. A sealing rubber ring 81 is provided between the quartz glass tube and the connecting sealing device 8. Preferably, the connecting sealing device 8 is a flange. By providing the connecting sealing device 8, the liquid sealing device 2 and the quartz glass tube are sealed and connected, so that one end of the quartz glass tube is placed inside the connecting sealing device 8, and the sealing rubber ring 81 provides an interference fit between the quartz glass tube and the connecting sealing device 8, thereby achieving a tight fit, preventing the quartz glass tube from becoming brittle and preventing gas leakage, and ensuring that the other end of the connecting sealing device 8 is firmly connected to the liquid sealing device 2.

[0067] A continuous fiber 4 ammonia atmosphere heat treatment method includes the following steps: S1: The fiber 4 is wound onto the unwinding ratio regulator 5, and one end of the wound fiber 4 is passed through liquid 211, gas channel 3, and fiber heating channel 11, and then through liquid 211 again before being connected to the winding ratio regulator 6; S2: The heating device 1 is turned on, and ammonia gas is simultaneously introduced into the gas channel 3; S3: Based on the data detected by the tension sensor 9, the control PLC system controls the rotation speed of motor 1 51 and motor 2 61; the fiber 4 is unwound through the unwinding ratio regulator 5, and the fiber 4 passes through liquid 211 and enters the gas channel 3, and then enters the fiber heating channel 11. The fiber 4 is heated in channel 11 and finally wound onto the winding ratio adjuster 6. The heating device 1 is turned on and ammonia gas is introduced into the gas channel 3. The fiber 4 undergoes heating and gas treatment in the heating channel. At the same time, the liquid 211 on the surface of the fiber 4 evaporates during the heating process. The tension data of the fiber 4 is detected by the tension sensor 9 and transmitted to the PLC system. The PLC system controls the speed of motor 51 and motor 61 based on the detected tension data, thereby controlling the winding and unwinding speed of the fiber 4 and thus controlling the tension of the fiber 4. Then, the winding ratio adjuster 6 winds up the heat-treated and gas-treated fiber 4.

[0068] The heating temperature is 900℃-1200℃, the ammonia flow rate is 0.5㎡ / h-0.7㎡ / h, the fiber 4 travels at a speed of 0.8m / h-1.2m / h, and the liquid 211 is liquid wax. The heating temperature of 900℃-1200℃ and the ammonia flow rate of 0.5㎡ / h-0.7㎡ / h allow for heat treatment and gas treatment of the fiber 4. The fiber 4 travels at a speed of 0.8m / h-1.2m / h, allowing for slow and thorough heat treatment and gas treatment within the fiber heating channel 11. The liquid 211, being liquid wax, ensures that the fiber 4's performance is not affected by the heat treatment and ammonia treatment conditions, while also allowing for rapid volatilization during the heat treatment process.

[0069] Example 2: The contents that are the same as in Example 1 will not be repeated here; the different aspects of this example from Example 1 are as follows: Preferably, the quartz glass tube is a spiral tube, and limit posts 113 are respectively provided at the inlet and outlet of the spiral tube; by making the quartz glass tube a spiral tube, the area of ​​the fiber 4 in the heating device 1 can be larger, the length of the heating device 1 can be shortened, and the heat treatment time can be shortened; by providing limit posts 113 at the inlet and outlet of the spiral tube, the fiber can enter the spiral tube smoothly.

[0070] A support member 111 is provided at the inflection point of the spiral tube, and the surface of the support member 111 is provided with a groove 112; preferably, when the inflection point is at the top, the support member 111 is connected to the lower tube wall of the inflection point, and when the inflection point is at the bottom, the support member 111 is connected to the upper tube wall of the inflection point; more preferably, the tube diameter at the inflection point is smaller than the tube diameter at the non-inflection point, the maximum tube diameter is 90-110mm, and the tube diameter at the inflection point is 10-90mm; more preferably, the angle of the tube wall near the fiber 4 at the inflection point is smaller than the angle of the tube wall away from the fiber 4 at the inflection point, and the inflection point is a smooth plane; the support member is provided at the inflection point of the spiral tube. 111. The support member 111 is provided with a groove 112, which limits the fiber 4 and prevents the fiber 4 from shifting. The support member 111 is set on the lower tube wall at the upper inflection point and the upper crank arm at the lower inflection point, so that the fiber 4 is taut between the lowest and highest points of the inflection point, limiting the position of the fiber 4 in the spiral tube and preventing the fiber 4 from shifting. The diameter of the tube at the inflection point is smaller than that of other parts, which achieves a reduction in diameter. The angle of the tube wall near the fiber 4 at the inflection point is smaller than the angle of the tube wall away from the fiber 4 at the inflection point, which can limit the inflection point where the fiber 4 contacts the tube wall, further preventing the fiber 4 from shifting.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A continuous fiber ammonia atmosphere heat treatment apparatus, characterized in that, It includes a heating device (1) and a gas channel (3), wherein the heating device (1) is provided with a fiber heating channel (11); The heating device (1) is connected to a liquid sealing device (2) at both ends. The liquid sealing device (2) includes a liquid sealing channel (21) and a sealing element (22). Liquid (211) is disposed in the liquid sealing channel (21). The fiber (4) passes through the liquid sealing channel (21). The sealing element (22) is disposed in the liquid sealing channel (21). The liquid (211) covers the lowest end of the sealing element (22). A gap is provided between the lowest end of the sealing element (22) and the liquid sealing channel (21). The fiber (4) passes through the gap. The gas channel (3) is located between the liquid sealing device (2) and the fiber heating channel (11), and the liquid sealing channel (21), the gas channel, and the fiber heating channel (11) are connected in sequence.

2. The continuous fiber ammonia atmosphere heat treatment apparatus according to claim 1, characterized in that, A positioning device (23) is provided inside the liquid sealing channel (21); The positioning device (23) includes a positioning post one (231), a positioning post two (232), and a positioning post three (233). The positioning post one (231) is disposed between the sealing element (22) and the bottom wall of the liquid sealing channel (21). The second positioning post (232) and the third positioning post (233) are respectively located on both sides of the sealing element (22).

3. The continuous fiber ammonia atmosphere heat treatment apparatus according to claim 1, characterized in that, The liquid sealing channel (21) includes a straight channel (212) and a groove (213), wherein the groove (213) is disposed on the lower side of the straight channel (212); The sealing element (22) is disposed in the groove (213), the liquid (211) is disposed in the groove (213), and the sealing element (22) is connected to the straight channel (212); Preferably, the sealing element (22) is a sealing plate, one end of which is connected to a channel (212), and the other end of which is disposed in the liquid (211).

4. The continuous fiber ammonia atmosphere heat treatment apparatus according to claim 1, characterized in that, The liquid sealing device (2) is provided with an unwinding ratio regulator (5) and a winding ratio regulator (6) at the two ends away from the heating device (1). The unwinding ratio regulator (5) includes a motor (51), and the output end of the motor (51) is connected to an unwinding roller (52). The winding ratio adjuster (6) includes a second motor (61), and the output end of the second motor (61) is provided with a winding roller (62); Preferably, it also includes several tension sensors (9), which are pressed against the fiber (4), and the tension sensors (9) are connected to a PLC control system; The PLC control system is connected to motor one (51) and motor two (61); Preferably, the tension sensor (9) is disposed between the liquid (211) sealing heating device (1) and the take-up roller (62).

5. The continuous fiber ammonia atmosphere heat treatment apparatus according to claim 4, characterized in that, A shrinkage compensation device (7) is provided between the unwinding ratio adjuster (5) and the liquid sealing device (2); Preferably, the shrinkage compensation device (7) includes a fixed seat (71) and a pressing block (72). The fixed seat (71) is connected to the liquid sealing device (2). The pressing block (72) is threadedly connected to the fixed seat (71) or slidably held. The pressing block (72) is used to press the fiber (4).

6. The continuous fiber ammonia atmosphere heat treatment apparatus according to claim 1, characterized in that, The heating device (1) includes a heating tube (12), and an insulating brick (13) is provided on the outside of the heating tube (12). The fiber heating channel (11) is provided inside the heating tube (12).

7. The continuous fiber ammonia atmosphere heat treatment device according to claim 1, wherein the fiber heating channel (11) is a quartz glass tube; a connecting sealing device (8) is provided between the liquid sealing device (2) and the quartz glass tube, one end of the connecting sealing device (8) is sleeved on the outside of the quartz glass tube, the other end of the connecting sealing device (8) is connected to the liquid sealing device (2), a sealing rubber ring (81) is provided between the quartz glass tube and the connecting sealing device (8), and the connecting sealing device (8) is connected to the fiber heating channel (11) and the gas channel (3); Preferably, the quartz glass tube is a straight tube; the connecting sealing device (8) is a flange; More preferably, the quartz glass tube is a spiral tube, and limit posts (113) are respectively provided at the inlet and outlet of the spiral tube.

8. The continuous fiber ammonia atmosphere heat treatment apparatus according to claim 7, wherein a support member (111) is provided at the inflection point of the spiral tube, and a groove (112) is provided on the surface of the support member (111); Preferably, when the inflection point is above, the support member (111) is connected to the lower pipe wall of the inflection point, and when the inflection point is below, the support member (111) is connected to the upper pipe wall of the inflection point. Preferably, the pipe diameter at the inflection point is smaller than the pipe diameter at the non-inflection point, the maximum pipe diameter is 90-110mm, and the pipe diameter at the inflection point is 10-90mm. More preferably, the angle of the tube wall near the fiber (4) at the inflection point is smaller than the angle of the tube wall away from the fiber (4) at the inflection point, and the inflection point is a smooth plane.

9. The continuous fiber ammonia atmosphere heat treatment method according to any one of claims 1-8, Includes the following steps: S1: Wrap the fiber (4) around the unwinding ratio adjuster (5), pass one end of the wound fiber (4) through the liquid (211), the gas channel (3), the fiber heating channel (11), and then connect it to the winding ratio adjuster (6) after passing through the liquid (211) again. S2: Turn on the heating device (1) and simultaneously introduce ammonia into the gas channel (3); S3: Based on the data detected by the tension sensor (9), the control PLC system controls the rotation speed of motor one (51) and motor two (61).

10. The continuous fiber ammonia atmosphere heat treatment method according to claim 9, wherein the heating temperature is 900℃-1200℃, and the ammonia flow rate is 0.5㎡ / h-0.7㎡ / h; The fiber (4) travels at a speed of 0.8 m / h to 1.2 m / h; The liquid (211) is liquid wax.

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