Method and device for producing high-strength and high-modulus vinylon filaments

Abstract

The invention discloses a production method and device of high-strength and high-modulus vinylon filaments, and belongs to the technical field of spinning processing. Wherein the silk yarn preparation step comprises the following steps: S1, preparing raw silk: forming a liquid column from a spinning solution through a spray spinning cap, and curing into silk through coagulating bath liquid, and the filament number is 1dtex-2dtex; the spraying speed of the stock solution from the spinneret cap is 10-40m / min; s2, pre-drafting is conducted, specifically, the protofilament bundle is wound around a pair of drafting rollers, the rotating speed of the first pre-drafting roller is 8 r / min-32 r / min (3 m / min-12 m / min), the rotating speed of the second pre-drafting roller is 16 r / min-64 r / min (6 m / min-24 m / min), and the drafting multiple is 1.5-2 times; the method is used for solving the problems in the manufacturing process of the high-strength and high-modulus vinylon filament, and the high-quality filament is produced by adopting a better production process and more suitable processing equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning processing, and specifically relates to a production method and device for high-strength and high-modulus vinylon filaments. Background Art

[0002] The main advantage of high-strength and high-modulus vinylon filament is good hygroscopicity. The moisture regain under standard conditions (20°C, RH 65%) is 2.5% to 4.5%, which is the best among conventional synthetic fiber varieties. It also has good corrosion resistance and sunlight resistance. It has no significant decrease in strength when placed in seawater or buried underground for a long time. The performance and appearance of vinylon fiber are very similar to natural silk, and it can be woven into silk fabrics. With the development of polyvinyl alcohol fiber production, its application in industry, agriculture, fishery, etc. is also expanding.

[0003] At present, the equipment for producing high-strength and high-modulus vinylon staple fibers is very popular at home and abroad, and the annual output of a single line has reached more than 3,000 tons. However, the production of vinylon filaments has not found a suitable production method. Only a few manufacturers imitate the staple fiber equipment to produce filaments, but the cost is high and the efficiency is low. In addition, during the production process, the filaments need to be processed by different processes, which are difficult to meet with the current equipment, resulting in reduced filament quality and failure to obtain high-quality filaments. Summary of the invention

[0004] In view of the above problems, the present invention provides a method and device for producing high-strength and high-modulus vinylon filaments, which are used to solve the problems in the manufacturing process of high-strength and high-modulus vinylon filaments, and produce high-quality filaments by adopting better production processes and more suitable processing equipment.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A method for producing high-strength and high-modulus vinylon filaments, comprising the steps of filament preparation and hot drawing;

[0007] Wherein: the silk thread preparation step comprises:

[0008] S1. Preparation of raw silk: The spinning solution is sprayed through the spinning cap to form a liquid column, and solidified into silk through the coagulation bath liquid. The single silk fineness is: 1dtex~2dtex; the speed of the raw solution spraying from the spinning cap is 10~40m / min;

[0009] S2, pre-stretching: the raw silk tow is passed through a pair of drafting rollers, the speed of the first pre-stretching roller is 8r / min~32r / min (3m / min~12m / min), the speed of the second pre-stretching roller is 16r / min~64r / min (6m / min~24m / min), and the drafting multiple is 1.5-2 times;

[0010] S3, neutralization, wet heat drawing, water washing and drying: dilute sulfuric acid is used to neutralize the alkali in the bath component carried by the tow; the drawing ratio is 1.5-2;

[0011] S4, rolling into cakes, keeping the moisture content ≤ 0.3%;

[0012] In the hot stretching step, the stretching temperature is 200°C-250°C, and the hot stretching multiple is 3-4 times.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: from spinning solution to filament forming, it is divided into two main steps, which can, on the one hand, reduce the problem of inconvenient equipment layout caused by too long production lines, and on the other hand, can achieve more sufficient processing of the raw silk and the drawn filaments in a single step. For example, in the silk thread production stage, the silk thread can be effectively washed and dried to provide better raw materials for the subsequent hot drawing step, and in the hot drawing stage, only the points that need to be controlled in the drawing process need to be guaranteed to avoid the defects left over from the production stage during hot drawing. From the perspective of the entire processing rhythm, it is more conducive to production scheduling, increased production efficiency, and better silk thread processing quality.

[0014] As a further improvement of the above scheme, the spinning solution is transported by a metering pump, and the metering pump and its inlet and outlet pipes are installed in a closed insulation box, and the temperature is controlled at 100℃±2℃;

[0015] The pumped spinning solution is filtered before passing through the spinneret, with a filtration accuracy of 5 to 10 μm.

[0016] The technical effect of the above improvement is: before the raw liquid is formed into silk, the quality of the raw liquid is first filtered and controlled, which can effectively ensure the quality of the formed raw silk. Therefore, during the filament drawing process, the wire breakage is avoided, the drawing multiple is increased, and the strength performance of the filament is increased.

[0017] As a further improvement of the above scheme, in step S3, the neutralized tow passes around the first winding roller, and then passes through wet heat drawing, and then passes around the second winding roller after drawing, and the tow passing through the second winding roller enters water washing and drying;

[0018] Washing temperature: 45±5℃, drying temperature: 140℃±5℃.

[0019] The technical effect of the above improvement is: the upper second winding roller is used to distinguish the neutralization, wet heat drawing, water washing and drying steps of the silk thread, which can maintain the continuity of the silk thread, ensure the rapid and continuous completion of the process, and improve the processing efficiency.

[0020] A production device for high-strength and high-modulus vinylon filaments, used to complete a hot drawing step, comprising a plurality of pairs of hot drawing roller assemblies, each pair of which has a different rotation speed, and an oil replenishing device for replenishing oil to the filament bundle is arranged between the plurality of hot drawing roller assemblies;

[0021] The inlet side of the hot drawing roller assembly is provided with a feeding roller and a wire separation roller for facilitating the winding of the tow, and the outlet side is also provided with a network device;

[0022] An oiling device for oiling the filament bundle is also provided on the inlet side of the feed roller.

[0023] The technical effect of the above improvement is: during hot stretching, the surface of the silk thread is replenished with oil through the oiling device, thereby reducing the friction generated when the hot stretching roller assembly rotates to stretch the silk bundle, thereby avoiding the breakage of the silk bundle during the stretching process. The silk thread can be replenished with oil through the oiling device in the middle of the stretching, so that the filament can be oiled again for stretching, which can avoid reducing oil evaporation during the hot stretching process.

[0024] As a further improvement of the above solution, the hot stretching roller assembly includes an outermost outer roller, the outer roller is connected to the first driving source, and a heater is arranged inside the outer roller for rotation;

[0025] A smoking pipe coaxially arranged with the outer roller is arranged at the center of the heater. One end of the smoking pipe is connected to a smoking plate for sucking away smoke generated on the outer roller, and the other end is connected to a suction pump.

[0026] The technical effect of the above improvement is: the smoke generated by the hot stretching of the filament bundle on the outer roller can be sucked away through the provided suction pump. The smoke passes through the smoking plate and the smoking pipe and will not directly go up and contact the filament bundle of the previous level, thereby avoiding the influence of the smoke on the filament bundle.

[0027] As a further improvement of the above solution, the discharge end of the suction pump is connected to a hose, which is connected to a smoke exhaust pipe through a multi-way connector, and a processing device for filtering and condensing smoke is provided on the smoke exhaust pipe;

[0028] The end of the smoke exhaust pipe is connected to the smoke suction joint.

[0029] As a further improvement of the above solution, the processing device includes a condensation box arranged on the smoke exhaust pipe, and the condensation box is provided with a plurality of fins extending into the interior of the smoke exhaust pipe;

[0030] A collecting box is arranged below the smoke exhaust pipe, and an adsorption member extending into the smoke exhaust pipe and contacting the fins is arranged in the collecting box, and extrusion members for extruding the adsorption member are arranged on both sides of the adsorption member, and the extrusion members are connected to the second driving source;

[0031] The bottom of the collecting box is connected to an overflow pipe, and the outlet end of the overflow pipe is connected to the oil replenishing device.

[0032] The technical effect of the above improvement is: the smoke sucked out is condensed by the processing device, so that the vaporized oil in the smoke can be condensed, and the smoke is filtered at the same time so that the smoke discharge meets environmental standards, and the condensed oil can be collected on the fins and drip onto the adsorption element for adsorption and collection. The collected oil can fall into the collection box under the extrusion of the extruder, and can be sent to the oil replenishing device through the overflow pipe for reuse.

[0033] As a further improvement of the above solution, the outer roller is rotatably arranged on the connecting seat, and the first driving source is arranged on the connecting seat;

[0034] The connecting seat is connected with a sliding block, which is slidably arranged on the sliding rail, and the sliding block is also connected with a third driving source for driving the connecting seat to interactively adjust the position up and down.

[0035] The technical effect of the above improvement is: under the drive of the third driving source, the connecting seat can be driven to move up and down, thereby prompting the outer roller to move up and down to adjust its position. The position can be adjusted as needed during winding or during the stretching process to improve the stretching effect.

[0036] As a further improvement of the above solution, a plurality of suction pipes are slidably arranged on the smoking tray, and the suction pipes are provided with a plurality of fine holes for extracting smoke and a smoke exhaust port which can be connected to the inside of the smoking tray;

[0037] A reciprocating central rod is arranged in the middle of the smoking tray, and the central rod and a plurality of suction pipes are fixed to each other and move synchronously;

[0038] A fourth driving source for driving the central rod to slide back and forth is arranged on the smoking tray.

[0039] The technical effect of the above improvement is that the suction pipe can be extended to the surrounding of the outer roller to continue to adsorb the smoke, thereby expanding the adsorption range, and the suction pipe can be slidably set to be pushed outward during the winding process to avoid interference with the winding.

[0040] As a further improvement of the above solution, the central rod goes deep into the smoking pipe, and a toggle rod is fixedly arranged at the end of the central rod;

[0041] The smoking pipe is provided with an air suction port which penetrates inside and outside, and a movable pipe is slidably provided inside the smoking pipe. When the toggle rod moves back and forth under the drive of the central rod, the movable pipe is toggled to open or close the air suction port;

[0042] A limiting ring for limiting the movable range of the movable tube is also arranged on the inner wall of the smoking tube.

[0043] The technical effect of the above improvement is: through the setting of the movable tube, the on and off of the suction port can be controlled, so during the winding process, the heat of the heater can be absorbed in the smoking tube, thereby reducing the heating of the outer roller. During the winding process, it can avoid long-term contact with the outer roller, thereby reducing high-temperature heating of the yarn bundle. After the winding is completed, the suction port is closed by pushing the movable tube to achieve normal drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the silk thread production process;

[0045] Figure 2 It is a schematic diagram of the overall structure of the production device of the present invention;

[0046] Figure 3 for Figure 2 Schematic diagram of the local cross-section structure in the AA direction;

[0047] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0048] Figure 5 for Figure 3 Schematic diagram of the local cross-sectional structure in the CC direction;

[0049] Figure 6 It is a structural schematic diagram of the oiling device;

[0050] Figure 7 It is a schematic diagram of the second structure of the hot stretching roller assembly;

[0051] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at point D in the middle.

[0052] In the figure: 10, hot stretching roller assembly; 1001, outer roller; 1002, heater; 1003, smoking pipe; 1004, smoking plate; 1005, suction pump; 1006, hose; 1007, multi-way joint; 1008, exhaust pipe; 1009, smoking joint; 1010, condensation box; 1011, fin; 1012, collection box; 1013, adsorption piece; 1014, extrusion piece; 1015, overflow pipe; 1016, connecting seat; 1017, slider; 1018, slide rail; 1019, suction pipe; 1020, exhaust port; 1021, center rod; 1022, toggle Rod; 1023, air suction port; 1024, movable pipe; 1025, limit ring; 11, feeding roller; 12, wire separation roller; 13, network device; 14, first oil receiving tank; 15, oil inlet pipe; 16, first oiling seat; 17, first sponge; 18, second sponge; 19, second oiling seat; 20, nozzle; 21, third sponge; 22, oil collecting tank; 23, candle filter; 24, metering pump; 25, spinneret; 26, vertical coagulation bath tube; 27, first pre-stretching roller; 28, second pre-stretching roller; 29, first winding roller; 30, second winding roller; 31, steering roller; 32, winder. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solution, the present invention is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0054] The specific scheme of this embodiment is: a method for producing high-strength and high-modulus vinylon filaments, including the steps of filament preparation and hot drawing;

[0055] Wherein: the silk thread preparation step comprises: S1, preparing raw silk: the spinning stock solution passes through the spinneret 25 to form a liquid column, and is solidified into silk by the coagulation bath, and the single silk fineness is: 1dtex~2dtex; the stock solution is sprayed out from the spinneret 25 at a speed of 10~40m / min, and when the silk thread enters the bath to solidify, the direction of the silk thread is from bottom to top, which is consistent with the flow direction of the bath, the silk thread immersion length is: about 1900mm, and the coagulation bath temperature is 50℃±5℃;

[0056] S2, pre-drafting: the raw silk tow is passed around a pair of drafting rollers, the speed of the first pre-drafting roller 27 is 8r / min~32r / min (3m / min~12m / min), the speed of the second pre-drafting roller 28 is 16r / min~64r / min (6m / min~24m / min), the drafting multiple is 1.5-2 times, the first pre-drafting roller 27 and the second pre-drafting roller 28 are made of 316L, the axes of the two rollers are parallel, arranged up and down, the end faces of the rollers are staggered by 40mm, and the drafting roller specifications are φ120mm×128mm;

[0057] S3, neutralization, wet heat drawing, water washing and drying: dilute sulfuric acid is used to neutralize the alkali in the bath component carried by the tow; the drawing ratio is 1.5-2; when washing, the tow is washed with warm water to remove the mirabilite contained in the tow and the salts produced by neutralization;

[0058] Please refer to the attached Figure 1 The neutralized filament bundle passes around the first winding roller 29, and then passes through wet heat drawing. After drawing, it passes around the second winding roller 30. The filament bundle passing through the second winding roller 30 enters water washing and drying; the water washing temperature is 45±5℃, and the drying temperature is: 140℃±5℃.

[0059] S4, rolling into cakes, keeping the moisture content ≤ 0.3%;

[0060] In the hot stretching step, the stretching temperature is 200°C-250°C, and the hot stretching multiple is 3-4 times.

[0061] As a preferred embodiment of the above embodiment, the spinning solution is transported by a metering pump 24, and the metering pump 24 and its inlet and outlet pipes are installed in a closed heat preservation box, and the temperature is controlled at 100°C ± 2°C;

[0062] The pumped spinning solution is filtered before passing through the spinneret 25, and the filtering accuracy is 5 to 10 μm.

[0063] See attached Figure 2-8 As shown, the present application also provides a production device for high-strength and high-modulus vinylon filaments, which is used to complete the hot drawing step, specifically, including a plurality of pairs of hot drawing roller assemblies 10, the hot drawing roller assemblies 10 are arranged in sequence from bottom to top, the hot drawing roller assemblies 10 are specifically arranged on a frame, and the speed of each pair of hot drawing roller assemblies 10 is different, and an oil replenishing device for replenishing oil to the filament bundle is arranged between the plurality of hot drawing roller assemblies 10 (see Appendix). Figure 1 At B in the middle, the oil replenishing device is mainly used to replenish oil to the drawn silk threads between the hot drawing roller assembly 10 to prevent the oil on the silk bundle from evaporating completely during the drawing process;

[0064] The hot drawing roller assembly 10 is provided with a feeding roller 11 and a wire separation roller 12 for facilitating the winding of the wire bundle on the inlet side, and a network device 13 is also provided on the outlet side;

[0065] An oiling device for oiling the filament bundle is also provided on the inlet side of the feeding roller 11; the feeding roller 11, the wire separator roller 12, the network device 13 and the oiling device are all arranged on the frame, and a last oiling device is also provided on the outlet side of the hot drawing roller assembly 10, and a winder for winding the drawn silk thread is provided under the frame. Specifically, when hot drawing is performed, the silk cake finally made in the silk thread preparation step is installed on a placement rack on the frame, and then one end of the pulled-out filament bundle passes through the oiling device and bypasses the feeding roller 11 and the wire separator roller 12, and then passes through the hot drawing roller assembly 10, the network device 13, passes through the last oiling device and is wound on the winder, and the filament bundle is hot drawn when bypassing the hot drawing roller assembly 10 to lengthen the length of the filament bundle.

[0066] like Figure 3 As shown, as a preferred embodiment of the above embodiment, the hot stretching roller assembly 10 includes an outermost outer roller 1001, the outer roller 1001 is connected to a first driving source, the first driving source is a motor, a heater 1002 is arranged inside the outer roller 1001, the heater 1002 and the outer roller 1001 do not contact each other, and when the motor drives the outer roller 1001 to rotate, the heater 1002 does not rotate with it;

[0067] A smoking pipe 1003 coaxially arranged with the outer roller 1001 is provided at the center position of the heater 1002. One end of the smoking pipe 1003 is connected to a smoking plate 1004 for sucking away the smoke generated on the outer roller 1001, and the other end is connected to a suction pump 1005. Specifically, when the filament bundle is wound around the outer roller 1001, the heater 1002 heats the outer roller 1001, causing the oil on the filament bundle to heat up, thereby generating smoke. When the suction pump 1005 starts working, the generated smoke is sucked away through the smoking plate 1004 and the smoking pipe 1003, thereby preventing the smoke from affecting the silk threads at other positions, thereby improving the quality of the filament bundle during drawing.

[0068] like Figure 3 , 4 As shown in Figure 5, as a preferred embodiment of the above embodiment, the discharge end of the suction pump 1005 is connected to a hose 1006, and the hose 1006 is connected to a smoke exhaust pipe 1008 by connecting a multi-way connector 1007. The multi-way connector 1007 collects multiple smoke sucked from the hot stretching roller assembly 10 in the smoke exhaust pipe 1008, and the smoke exhaust pipe 1008 is provided with a processing device for filtering and condensing the smoke; the end of the smoke exhaust pipe 1008 is connected to a smoking connector 1009, and the smoking connector 1009 can be connected to other processing devices.

[0069] As a preferred embodiment of the above embodiment, the processing device includes a condensation box 1010 arranged on the smoke exhaust pipe 1008, and circulating cooling water is introduced into the condensation box 1010. The condensation box 1010 is provided with a plurality of fins 1011 extending into the smoke exhaust pipe 1008, and a plurality of filter screens for filtering the smoke are also provided in the smoke exhaust pipe 1008. The filter screens can filter the smoke on the one hand, and on the other hand, can slow down the flow speed of the smoke, so that it is easier to contact with the fins 1011 for condensation;

[0070] A collecting box 1012 is arranged below the smoke exhaust pipe 1008, and an adsorbent 1013 is arranged in the collecting box 1012, which extends into the smoke exhaust pipe 1008 and can contact the fins 1011. Specifically, the adsorbent 1013 can be filled with materials such as sponge and cotton, and in this embodiment, it is a sponge. Extrusion pieces 1014 for squeezing the adsorbent 1013 are arranged on both sides of the adsorbent 1013, and the extrusion piece 1014 is specifically an extrusion plate. The extrusion piece 1014 is connected to a second driving source, and the specific second driving source is an electromagnet. After being energized, the electromagnet pushes the extrusion piece 1014 to move toward one side of the adsorbent 1013, thereby squeezing the adsorbent 1013, so that the oil adsorbed in the adsorbent 1013 can be squeezed out. After the electromagnet is energized, the spring connected to the connecting seat of the extrusion piece 1014 can push the extrusion piece 1014 to retreat and reset, thereby losing the clamping effect on the adsorbent 1013.

[0071] The bottom of the collecting box 1012 is connected to an overflow pipe 1015, and the outlet end of the overflow pipe 1015 is connected to the oil replenishing device. For details, please refer to the attached Figure 4 The oil replenishing device includes a first oil receiving groove 14 fixedly arranged between the frame, an oil inlet pipe 15 is arranged above the first oil receiving groove 14, the oil inlet pipe 15 is connected to the oil replenishing pump, and is interconnected with the overflow pipe 1015, and a first oiling seat 16 is fixedly arranged on the top of the first oil receiving groove 14. The cross-section of the first oiling seat 16 is "C"-shaped, and a first sponge 17 that can contact with the yarn bundle is arranged inside the first oiling seat 16, and a second sponge 18 for applying oil to the yarn bundle is arranged in the first oil receiving groove 14. Therefore, when the yarn bundle moves from bottom to top, the oil on the first oil receiving groove 14 is applied to the yarn bundle through the second sponge 18, and then the first sponge 17 contacts with the yarn bundle to suck out the excess oil on the yarn bundle.

[0072] like Figure 3As shown, as a preferred embodiment of the above embodiment, the outer roller 1001 is rotatably arranged on the connecting seat 1016, and the first driving source is arranged on the connecting seat 1016; the connecting seat 1016 is connected with a slider 1017, the slider 1017 is slidably arranged on the slide rail 1018, the slide rail 1018 is fixedly arranged on the frame, and the slider 1017 is also connected with a third driving source for driving the connecting seat 1016 to interactively adjust the position up and down. In this embodiment, the third driving source is a driving motor fixedly arranged on the frame, and a screw rod is connected to the output shaft of the motor, and the screw rod and the threaded sleeve arranged on the slider 1017 are threadedly connected to each other. When winding or drafting is performed, the slider 1017 can be driven by the motor to move up and down. The motor changes the rotation direction to realize the position change of the driving slider 1017, the connecting seat 1016 and the outer roller 1001 in the up and down directions. Therefore, when the outer roller 1001 changes its up and down position, the hose 1006 can still maintain the continuous exhaust effect on the smoke.

[0073] On the other hand, a smoke exhaust port is also provided on the frame, a pipe is connected to the smoke exhaust port, and a hose is also used to connect the pipe to the suction pump 1005, so that the smoke generated during the drawing process can be further adsorbed and discharged.

[0074] Furthermore, the present application further introduces the oiling device, as shown in the attached Figure 6 , including a second oiling seat 19 fixedly arranged with the frame, the cross-section of the second oiling seat 19 is also "C"-shaped, and a nozzle 20 for spraying oil to the tow is arranged on one side of the second oiling seat 19, and a third sponge 21 is arranged inside the second oiling seat 19, and the third sponge 21 has an opening for introducing the tow, and the lower end of the third sponge 21 extends to the outside of the second oiling seat 19, and an oil collecting trough 22 is fixedly arranged on the outside of the second oiling seat 19, and the protruding part of the third sponge 21 extends into the oil collecting trough 22, and introduces excess oil into the oil collecting trough 22 for storage and collection.

[0075] like Figure 7 , 8 As shown, another structure of a hot stretching roller assembly 10 is provided, and the main structure is the same as that of the above embodiment, except that: a plurality of suction pipes 1019 are slidably provided on the smoking tray 1004, and a plurality of fine holes for sucking smoke and a smoke exhaust port 1020 which can be connected to the inside of the smoking tray 1004 are provided on the suction pipes 1019. After the suction pump 1005 generates negative pressure by adsorption, the smoke generated by the stretching can be sucked into the suction pipes 1019 through the suction pipes 1019, and then introduced into the smoking tray 1004 through the smoke exhaust port 1020 and discharged to the outside;

[0076] In order to facilitate winding before stretching, a reciprocating center rod 1021 is arranged in the middle of the smoking tray 1004, and the center rod 1021 and a plurality of suction tubes 1019 are fixed to each other and move synchronously; a fourth driving source for driving the center rod 1021 to slide back and forth is arranged on the smoking tray 1004. Specifically, in the present embodiment, the center rod 1021 is a screw rod, and its fourth driving source is an electric motor, and a reducer is connected to the output shaft of the motor. The output shaft of the reducer drives a threaded sleeve (not drawn in the accompanying drawings) arranged on the center rod 1021 to rotate, and the threaded sleeve and the smoking tray 1004 are arranged to rotate with each other. Therefore, when the motor rotates, it can drive the threaded sleeve to rotate, thereby driving the center rod 1021 to reciprocate.

[0077] The central rod 1021 extends into the interior of the smoking tube 1003, and a toggle rod 1022 is fixedly provided at the end of the central rod 1021; an air inlet 1023 penetrating from the inside to the outside is provided on the smoking tube 1003, and a movable tube 1024 is slidably provided in the smoking tube 1003, such as Figure 7 The end of the movable tube 1024 is provided with an inward boss. When the toggle rod 1022 reciprocates under the drive of the center rod 1021, the movable tube 1024 is toggled to open or close the air inlet 1023. Therefore, when the center rod 1021 reciprocates, the boss at the upper end of the movable tube 1024 can be toggled by the toggle rod 1022, so that the movable tube 1024 moves together. Since the movable tube 1024 is long, the center rod 1021 only moves one end of the movable tube 1024 each time. A through hole is provided on the movable tube 1024. Therefore, when the movable tube 1024 is toggled to move toward the side of the smoking tray 1004, the through hole on the movable tube 1024 can be moved. It coincides with the suction port 1023. At this time, the suction pump 1005 will absorb external air through the suction port 1023, thereby reducing the heat on the heater 1002 and reducing the heat on the outer roller 1001, thereby avoiding the damage of the filament bundle due to staying on the outer roller 1001 for too long when winding. When the center rod 1021 pushes the movable tube 1024 toward the side of the suction pump 1005, the suction port 1023 can be closed, thereby realizing normal heating for hot stretching. A limiting ring 1025 for limiting the movable tube 1024's movable range is also provided on the inner wall of the smoking tube 1003. The limiting ring 1025 can prevent the movable tube 1024 from moving freely in the smoking tube 1003.

[0078] It should be noted that, in this article, the terms include, contain or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the present invention. The above examples are only used to help understand the method of the present invention and its core idea. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A method for producing high-strength and high-modulus vinylon filaments, characterized in that: It includes the steps of silk thread preparation and hot drawing; Wherein: the silk thread preparation step comprises: S1. Preparation of raw silk: The spinning stock solution passes through the spinneret (25) to form a liquid column, and is solidified into silk by a coagulation bath, and the single silk fineness is: 1dtex to 2dtex; the stock solution is ejected from the spinneret (25) at a speed of 10 to 40 m / min; S2, pre-stretching: the raw filament bundle is passed through a pair of stretching rollers, the speed of the first pre-stretching roller (27) is 8r / min-32r / min (3m / min-12m / min), the speed of the second pre-stretching roller (28) is 16r / min-64r / min (6m / min-24m / min), and the stretching multiple is 1.5-2 times; S3, neutralization, wet heat drawing, water washing and drying: dilute sulfuric acid is used to neutralize the alkali in the bath component carried by the tow; the drawing ratio is 1.5-2; S4, rolling into cakes, keeping the moisture content ≤ 0.3%; In the hot stretching step, the stretching temperature is 200°C-250°C, and the hot stretching multiple is 3-4 times.

2. The method for producing high-strength and high-modulus vinylon filament according to claim 1, characterized in that: The spinning solution is transported by a metering pump (24), and the metering pump (24) and its inlet and outlet pipes are installed in a closed heat preservation box, and the temperature is controlled at 100°C ± 2°C; The pumped spinning solution is filtered before passing through the spinneret (25) with a filtering accuracy of 5 to 10 μm.

3. The method for producing high-strength and high-modulus vinylon filament according to claim 1, characterized in that: In step S3, the neutralized tow is passed around a first winding roller (29), and then is subjected to wet heat drawing. After drawing, the tow is passed around a second winding roller (30), and the tow passes through the second winding roller (30) and enters water washing and drying; Washing temperature: 45±5℃, drying temperature: 140℃±5℃.

4. A production device for high-strength and high-modulus vinyl filaments, used in the production method for high-strength and high-modulus vinyl filaments according to any one of claims 1 to 3, characterized in that: It comprises a plurality of pairs of hot drafting roller assemblies (10), and the rotation speed of each pair of hot drafting roller assemblies (10) is different, and an oil replenishing device for replenishing oil to the filament bundle is arranged between the plurality of hot drafting roller assemblies (10); The hot drawing roller assembly (10) is provided with a feeding roller (11) and a filament separation roller (12) on the inlet side for facilitating the winding of the filament bundle, and a network device (13) is also provided on the outlet side; An oiling device for oiling the filament bundle is also provided on the inlet side of the feeding roller (11).

5. The production device of high-strength and high-modulus vinylon filament according to claim 4, characterized in that: The hot stretching roller assembly (10) comprises an outermost outer roller (1001), the outer roller (1001) is connected to a first driving source, and a heater (1002) is arranged inside the outer roller (1001) for rotation; A smoking pipe (1003) coaxially arranged with the outer roller (1001) is provided at the center of the heater (1002); one end of the smoking pipe (1003) is connected to a smoking plate (1004) for sucking away smoke generated on the outer roller (1001), and the other end is connected to a suction pump (1005).

6. The production device of high-strength and high-modulus vinylon filament according to claim 5, characterized in that: The discharge end of the suction pump (1005) is connected to a hose (1006), and the hose (1006) is connected to a smoke exhaust pipe (1008) via a multi-way connector (1007). The smoke exhaust pipe (1008) is provided with a processing device for filtering and condensing smoke; The end of the smoke exhaust pipe (1008) is connected to the smoking joint (1009).

7. The production device of high-strength and high-modulus vinylon filament according to claim 6, characterized in that: The processing device comprises a condensation box (1010) arranged on the smoke exhaust pipe (1008), and the condensation box (1010) is provided with a plurality of fins (1011) extending into the interior of the smoke exhaust pipe (1008); A collecting box (1012) is arranged below the smoke exhaust pipe (1008), and an adsorption member (1013) is arranged in the collecting box (1012) and extends into the smoke exhaust pipe (1008) and can contact the fins (1011), and extrusion members (1014) for extruding the adsorption member (1013) are arranged on both sides of the adsorption member (1013), and the extrusion member (1014) is connected to a second driving source; An overflow pipe (1015) is provided at the bottom of the collection box (1012), and an outlet end of the overflow pipe (1015) is connected to the oil replenishing device.

8. The production device of high-strength and high-modulus vinylon filament according to claim 5, characterized in that: The outer roller (1001) is rotatably disposed on a connection seat (1016), and the first driving source is disposed on the connection seat (1016); The connecting seat (1016) is connected to a slider (1017), the slider (1017) is slidably arranged on a slide rail (1018), and the slider (1017) is also connected to a third driving source for driving the connecting seat (1016) to interactively adjust its position up and down.

9. A production device for high-strength and high-modulus vinylon filaments according to any one of claims 5 to 8, characterized in that: A plurality of suction pipes (1019) are slidably arranged on the smoking tray (1004), and the suction pipes (1019) are provided with a plurality of fine holes for extracting smoke and a smoke exhaust port (1020) that can be connected to the inside of the smoking tray (1004); A reciprocating central rod (1021) is disposed in the middle of the smoking tray (1004), and the central rod (1021) and a plurality of suction pipes (1019) are fixed to each other and move synchronously; A fourth driving source for driving the central rod (1021) to slide back and forth is arranged on the smoking tray (1004).

10. The production device of high-strength and high-modulus vinylon filament according to claim 9, characterized in that: The central rod (1021) extends deep into the smoking tube (1003), and a toggle rod (1022) is fixedly arranged at the end of the central rod (1021); The smoking pipe (1003) is provided with an air suction port (1023) penetrating inside and outside, and a movable pipe (1024) is slidably provided inside the smoking pipe (1003). When the toggle rod (1022) is driven by the central rod (1021) to reciprocate, the movable pipe (1024) is toggled to open or close the air suction port (1023); A limiting ring (1025) for limiting the range of movement of the movable tube (1024) is also provided on the inner wall of the smoking tube (1003).

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