CN205474136U - Coagulating bath device of counterpoint aramid fiber bull spinning - Google Patents

Abstract

The utility model relates to a coagulating bath device of counterpoint aramid fiber bull spinning, which comprises a bracket, install the bath on the support, the bath is the double side wall structure, its bottom center sets up the coagulating bath import, set up the coagulating bath overflow mouth between the double side wall, evenly arrange three above porcelain valve spud around the coagulating bath import, the stationary flow dish that a center was equipped with the through -hole sets firmly on every porcelain valve spud, the through -hole fit in of stationary flow dish sets up repiece draft pipe, set up the internal thread in the repiece draft pipe both ends and one end sets up the flange outward, the sleeve pipe middle part sets up the repiece water inlet, the honeycomb duct is established to the sleeve pipe endotheca, the honeycomb duct include the external diameter be lighter than set section of emboliaing of internal diameter of pipe, with the sheathed tube in screw -thread fit the boss section and expose in the peripheral hardware section of set outside of tubes, set up the porcelain mouth that has interior outer lane in the sheathed tube other end, outer lane and the interior screw -thread fit of sheathed tube, the inner circle of porcelain mouth and the opening clearance fit of the honeycomb duct section of emboliaing of porcelain mouth. Compared with the prior art, the utility model discloses small, output is high.

Description

A kind of coagulating bath device of p-aramid fiber multi-end spinning

Technical field

This utility model relates to spining technology field, is specifically related to the coagulating bath device of a kind of p-aramid fiber multi-end spinning.

Background technology

P-aramid fiber is a Typical Representative in aramid fiber, is made up of paraphthaloyl chloride p-phenylenediamine spinning, and staple has the Twaron etc. of the Kevlar of Du Pont, Supreme Being people.Taken the lead in successfully researching and developing in 1972 by du pont company, its trade name Kevlar, domestic related scientific research institutes and unit, the research of para-aramid fiber is carried out the sixties in 20th century, having grasped key technology and equipment and technique that p-aramid fiber produces at present, relevant enterprise utilizes this technology to achieve the industrialization of para-aramid fiber.

The main performance of p-aramid fiber is high intensity, high-modulus and high temperature resistant.Meanwhile, it also has suitable toughness and is available for textile process；Resistant to elevated temperatures insulating paper can also be made.The weight ratio hot strength of p-aramid fiber is 6 times of steel wire, 3 times of glass；Its stretch modulus is 3 times of steel wire, 2 times of glass.At 200 DEG C 100 hours, still keep the intensity of 75%.PPTA type aramid fiber is widely used in the fields such as Aeronautics and Astronautics, telecommunications, reinforcing material, papermaking.

The preparation of p-aramid fiber mainly with paraphthaloyl chloride p-phenylenediamine polymer as raw material, is made by special handling in the spinning process of dry-jet wet-spinning.Concrete steps include: extruded from spinneret by spinning solution, by the liquid stream extruded from spinneret vertically through airflow layer, enter in coagulating bath, drawn by godet roller, obtain as-spun fibre, scrubbed, dry, winding after obtain para-aramid fiber precursor, wherein, described coagulating bath is sulfuric acid solution, is made up of sulphuric acid and water, its mass fraction is 2% 20%, and the temperature of coagulating bath is 5 25 DEG C.The coagulation bath condition of the present invention can significantly reduce the fiber number of fiber, the intensity of raising para-aramid fiber, and reduces the visual defects of fiber, improves fiber quality, thus is effectively improved the stability of spinning technique and the quality of fiber product.

The spinning of previous domestic p-aramid fiber is typically the corresponding coagulating bath device of a spinning pump, for improving spinning yield, equipment capacity is made to meet market demand, reduce and consume, thus reach the purpose increased economic efficiency, current applicant the most successfully have developed bull and prepares the coagulation forming equipment of spinning, 3 coagulating bath devices as corresponding in 1 spinning pump, but the thing followed, the technical issues that need to address be tow after spinneret in coagulating bath temperature field uneven, concentration field is uneven, lousiness quantity is many, the problem that fiber end breakage rate is high and fiber irregularity is high.Such as, in the case of high speed spinning, the gait of march of the tow passed through from bath increases, and the solidification liquid flowed along with the traveling of tow i.e. increases the most therewith with the flow velocity of stream.Owing to this is with the increase of stream flow velocity, the liquid level of solidification liquid can produce fluctuation, even whirlpool.This solidification liquid liquid surface can cause disorder or the fracture of wire that the monofilament in tow arranges.In the case of solidification liquid liquid surface is significant, partially or fully contacting with solidification liquid of the spray webbing face of spinning head, cause spinning head to impregnate, and then spinning can not be carried out.Therefore, in addition to spinning technique is most important, the structure of bath is also the key factor determining strand performance.

Summary of the invention

Temperature field is uneven, concentration field is uneven with in the coagulating bath that solves to it is an object of the invention to provide the coagulating bath device Ji of a kind of p-aramid fiber multi-end spinning, and lousiness quantity is many, the problem that fiber end breakage rate is high and fiber irregularity is high.To this end, technical scheme is disclosed in this utility model:

A kind of coagulating bath device of p-aramid fiber multi-end spinning, including support 1, the bath 2 being arranged on support 1, described bath 2 is double side wall structure, its bottom centre arranges coagulating bath import 21, coagulating bath overfall 22 is set between double side wall, it is characterized in that: be evenly arranged the porcelain mouth seat 3 of more than 3 around coagulating bath import 21, on each porcelain mouth seat 3, a fixed center is provided with the current stabilization dish 4 of through hole, repiece drafting tube 5 it is equipped with in the through hole of current stabilization dish 4, arrange in described repiece drafting tube 5 two ends and flange 54 is set outside female thread and one end, a repiece water inlet 53 communicated with its inner chamber is also set up in the middle part of sleeve pipe 51, sheathed mozzle 52 in sleeve pipe 51；Mozzle 52 includes that external diameter is less than the section of being inserted in 521 of casing inner diameter and the boss section 522 of the screw-internal thread fit of sleeve pipe and the peripheral hardware section 523 being exposed to outside sleeve pipe；Being provided with the screw-internal thread fit of the porcelain mouth 6 of Internal and external cycle, the outer ring of porcelain mouth 6 and sleeve pipe 51 in the other end of sleeve pipe 51, the inner ring of porcelain mouth 6 coordinates with the opened gap of mozzle 52 section of being inserted in 521.

Further, current stabilization dish 4 arranges sealing ring with coordinate place, sleeve pipe 51 other end of sleeve pipe 51 one end with coordinate place, the porcelain mouth 6 of repiece drafting tube 5 in the cannelure 100 coordinating place of mozzle boss section 522.

Further, in bath 2, also set up rectifying disc, the sidewall of this rectifying disc is abound with micropore.

Compared with prior art, coagulating bath device is carried out redesigning transformation by this utility model, it is achieved 1 spinneret spinning position more than 3, substantially increases yield, and theoretical yield is 3 times before, greatly reduces consumption, improves economic benefit.And volume is little, compact conformation, and modular manufacturing and replacing can be realized.Each construction unit uses modular manufacturing, it is easy to accomplish standardization, the simultaneously production of component units, maintenance, changes simple and convenient, is suitable for the most extensively applying.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the top view of Fig. 1.

Fig. 3 is the structural representation of this utility model repiece drafting tube.

Fig. 4 is the sectional view of Fig. 3.

Detailed description of the invention

A kind of coagulating bath device of p-aramid fiber multi-end spinning, including support 1, the bath 2 being arranged on support 1, described bath 2 is double side wall structure, its bottom centre arranges coagulating bath import 21, coagulating bath overfall 22 is set between double side wall, it is characterized in that: be evenly arranged the porcelain mouth seat 3 of more than 3 around coagulating bath import 21, on each porcelain mouth seat 3, a fixed center is provided with the current stabilization dish 4 of through hole, repiece drafting tube 5 it is equipped with in the through hole of current stabilization dish 4, arrange in described repiece drafting tube 5 two ends and flange 54 is set outside female thread and one end, a repiece water inlet 53 communicated with its inner chamber is also set up in the middle part of sleeve pipe 51, sheathed mozzle 52 in sleeve pipe 51；Mozzle 52 includes that external diameter is less than the section of being inserted in 521 of casing inner diameter and the boss section 522 of the screw-internal thread fit of sleeve pipe and the peripheral hardware section 523 being exposed to outside sleeve pipe；Being provided with the screw-internal thread fit of the porcelain mouth 6 of Internal and external cycle, the outer ring of porcelain mouth 6 and sleeve pipe 51 in the other end of sleeve pipe 51, the inner ring of porcelain mouth 6 coordinates with the opened gap of mozzle 52 section of being inserted in 521.Current stabilization dish 4 arranges sealing ring with coordinate place, sleeve pipe 51 other end of sleeve pipe 51 one end with coordinate place, the porcelain mouth 6 of repiece drafting tube 5 in the cannelure 100 coordinating place of mozzle boss section 522.Also set up rectifying disc in bath 2, the sidewall of this rectifying disc is abound with micropore.

Spinning solution is extruded from precision metering pump, spinneret is entered through fully dissolving from stock solution pipeline, the aramid fiber yarn of different size can be made by the hole count regulating each spinneret, spray from spinneret, after one section of gas blanket is typically air layer, entering and solidify fibroblast in bath 2, the spray webbing identity distance of the i.e. spinneret of the thickness of above-mentioned gas layer is usually 2 25mm from the distance of bath 2 liquid level.Spinning solution, after gas blanket, enters bath 2 and solidifies.Usually, the stability of coagulating bath liquid level and the temperature of coagulating bath, concentration directly affects performance and the quality of final products of solidification strand.

When carrying out multi-end spinning, the spinning solution stock solution entrance from the solid plate edge top of coagulation system flows into, flowing in 3 repiece drafting tubes 5 after the rectifying disc rectification in bath 2, stop about 0.5 10 milliseconds of times in drafting tube, then 3 stock solution outlets bottom bath 2 are flowed out.

A side of entering for bath 2 is provided with rectifying disc, and recirculated water provides power to enter from coagulating bath import 21 by water circulating pump, on the one hand can be got rid of the impurity in water by the filtration of rectifying disc sidewall pores, it is to avoid produces lousiness and fracture of wire phenomenon, improves the apparent of silk；On the other hand water can form uniform and stable current from rectifying disc entrance, such spinning solution tow pass therethrough can run smooth and easy, it is to avoid the generation of the situation such as lousiness, looped pile.Be provided with coagulating bath overfall 22 in tray bottom, coagulating bath overfall 22 is connected with conduit.Bath 2 of the present utility model can regulate solidification liquid liquid level conveniently and efficiently, makes bath 2 can adapt to large range of spinning speed, thus saves the device space, reduces cost.

Flowing through porcelain mouth 6 from the fiber finer of spinneret extrusion and flow into coagulating bath device, after supersolidification, the liquid outlet through the peripheral hardware section 523 of mozzle 52 flows out formation as-spun fibre, is then passed through godet roller and is introduced into the continuation processing of back segment operation.Coagulating bath is mainly made up of water, temperature is controlled in 10 20 DEG C, the fiber time of staying in coagulating bath is 0.5 10 milliseconds, the draw ratio of fiber is 80% 300%, this multi-end spinning technology can significantly improve the production efficiency of aramid fiber, spin scooter 600m/min, and fiber visual defects can be reduced, improve fiber quality.So that the stability of spinning technique and fiber yield and quality all effectively improve.

The spinning solution got off by spinneret enters the porcelain mouth 6 in coagulating bath, and the airflow layer height between coagulating bath and spinneret is 5mm 20mm.It it is 0.5 10 milliseconds from the liquid stream of the spinneret extrusion time of staying coagulating bath.The section of being inserted in 521 entering repiece drafting tube from porcelain mouth 6 from the spinning solution thread of spinneret process carries out first drawing-off, strand after supersolidification flows out after peripheral hardware section 523 drawing-off again, finally carry out washing process through each treatment tube, after the strand of washing process is heated by drier roll, oiled by oiling roller and final coiling and molding.

Coagulating bath is flowed into by coagulation system coagulating bath import 21, flows in bath 2 after the rectifying disc rectification in bath 2 is filtered, and then the coagulating bath overfall 22 between bath 2 double side walls flows out.Coagulating bath liquid level stabilizing, strand frictional resistance in high speed traveling process reduces, strand uniform force, the coagulating bath that in bath 2, concentration is relatively low through with spinning liquid double diffusion after, the concentration of coagulating bath gradually rises, the solution that concentration is higher can spread to the outside of bath 2, flows out eventually through coagulating bath overfall 22.After the rectification of coagulating bath solidifies, spinning solution is in good condition, and fiber is uniformly and lousiness quantity is few, in whole spinning winding technique, break situations seldom occurs.

Coagulating bath in bath 2 is disposable recirculated water, circulating pump drive.

A bigger radial direction draft is needed during spinning repiece, bath of the present utility model solves this problem well, after repiece water is entered by repiece water inlet 53, after the chuck that the sealing of composition between the inwall and the outer wall of mozzle 52 of sleeve pipe 51 is good, it is circulated by pump pressure, the choked flow in gap through inner ring and mozzle 52 section of being inserted in 521 of porcelain mouth 6, the inner chamber being ejected into mozzle 52 produces downward uniform draft, decrease silk refluence in downward drawing process, turbulent phenomenon, thus meet spinning winding and the situation of repiece occurs to need again during broken end.

By this spinning technique, monofilament tensile strength improves to 25CN, and finally increases the CV value of fiber product performance.The CV value i.e. coefficient of variation, it is defined as the ratio of standard deviation and meansigma methods, is the statistic weighing each measured value degree of variation.Can produce p-aramid fiber filament fiber scope is 200dtex-3000dtex, owing to being placed on lowering or hoisting gear, therefore the height of this coagulating bath distance filament spinning component can regulate, design by this three header structure coagulating baths, single potential theory output increased is to 3 times, greatly improve production efficiency, improve economic benefit.Coagulating bath liquid level steadily without fluctuation, is evenly distributed, and improves fiber flatness.

Claims (3)

1. the coagulating bath device of a p-aramid fiber multi-end spinning, including support (1), the bath (2) being arranged on support (1), described bath (2) is double side wall structure, its bottom centre arranges coagulating bath import (21), coagulating bath overfall (22) is set between double side wall, it is characterized in that: be evenly arranged porcelain mouth seat (3) of more than 3 around coagulating bath import (21), the upper fixed center of each porcelain mouth seat (3) is provided with the current stabilization dish (4) of through hole, repiece drafting tube (5) it is equipped with in the through hole of current stabilization dish (4), arrange in described repiece drafting tube (5) two ends and flange (54) is set outside female thread and one end, sleeve pipe (51) middle part also sets up a repiece water inlet (53) communicated with its inner chamber, sheathed mozzle (52) in sleeve pipe (51)；Mozzle (52) includes that external diameter is less than the section of being inserted in (521) of casing inner diameter and the boss section (522) of the screw-internal thread fit of sleeve pipe and the peripheral hardware section (523) being exposed to outside sleeve pipe；The screw-internal thread fit of the porcelain mouth (6) of Internal and external cycle, the outer ring of porcelain mouth (6) and sleeve pipe (51) it is provided with in the other end of sleeve pipe (51), The inner ring of porcelain mouth (6) coordinates with the opened gap of mozzle (52) section of being inserted in (521).

The coagulating bath device of a kind of p-aramid fiber multi-end spinning the most according to claim 1, it is characterised in that: current stabilization dish (4) arranges sealing ring with coordinate place, sleeve pipe (51) other end of sleeve pipe (51) one end with coordinate place, the porcelain mouth (6) of repiece drafting tube (5) in the cannelure (100) coordinating place of mozzle boss section (522).

The coagulating bath device of a kind of p-aramid fiber multi-end spinning the most according to claim 1, it is characterised in that: bath also sets up rectifying disc in (2), and the sidewall of this rectifying disc is abound with micropore.