CN213417090U - Spinning device and polyacrylonitrile fiber spinning machine - Google Patents

Abstract

The utility model discloses a spinning device, include the pair roller of constituteing by the first spinning roller and the second spinning roller of diameter difference, the strand silk is in turn through first spinning roller and second spinning roller, twines to the other end from the one end of pair roller, second spinning roller includes the washing section, realizes the washing to the strand silk through water spray mechanism to washing section water spray, has further guaranteed that the diameter is differentThe quality of the yarn. The utility model discloses a polyacrylonitrile fiber spinning machine, including forming device and above-mentioned spinning device, forming device includes coagulating bath groove, a wash bowl and sets up the draft roller between coagulating bath groove and a wash bowl, the diameter of draft roller is d, and the rotational speed is n, the diameter of first spinning roller is d₁At a rotational speed of n₁Wherein: n/n₁＜d₁And d. The speed of the strand silk entering the primary washing tank is less than that of the strand silk leaving the primary washing tank, and the whole process flow is only drafted once in the primary washing tank without multiple drafters, so that the production equipment is simplified.

Description

Spinning device and polyacrylonitrile fiber spinning machine

Technical Field

The utility model belongs to the technical field of the textile technology and specifically relates to a spinning equipment and polyacrylonitrile fiber spinning machine.

Background

The polyacrylonitrile fiber in the current market mainly comprises acrylic staple fiber, acrylic filament and polyacrylonitrile-based carbon fiber protofilament, and the three have similar production processes. The difference between the acrylic fiber filament and other polyacrylonitrile fibers is mainly that the current application field of the acrylic fiber filament is mainly textile fabrics, so that the requirement on the uniformity and quality of the monofilament of the acrylic fiber filament is high, and the requirement on the production quality stability of the acrylic fiber filament is also high. The above characteristics also cause that compared with the acrylic staple fiber or polyacrylonitrile-based carbon fiber precursor, if the same production process and equipment are used for production, the production cost of the acrylic filament is higher, and the production of the acrylic filament in the current market is less compared with the other two kinds of polyacrylonitrile fibers. Therefore, there is a need to develop a preparation process that can produce various types of polyacrylonitrile fibers at a lower cost.

The utility model with the application number of CN201310640834.4 discloses a novel high-speed spinning machine, which comprises a frame, a glue supply device, a strand silk forming device, a spinning device and a winding device, wherein the forming part of the winding device is positioned at the outer side of the area between wallboards at two sides of the frame and at the other side opposite to the spinning surface, the glue supply device and the winding device are respectively positioned at the outer sides of the wallboards, the spinning surface is the area which is arranged at the outer side of the wallboard of the frame and is provided with the strand silk forming device, and the other side opposite to the area provided with the strand silk forming device is called as the winding surface; the spinning device comprises at least one group of spinning rollers, each group of spinning rollers comprises an upper spinning roller and a lower spinning roller which are responsible for drafting, two ends of the upper spinning roller and two ends of the lower spinning roller are fixed, the upper spinning roller and the lower spinning roller are driven by a synchronous belt to rotate, a water washing device is arranged between the two spinning rollers in the axial direction of the two spinning rollers, and an oiling device is arranged at the rear section of the lower spinning roller between the two spinning rollers; an independent drying drafting roller is arranged between an upper spinning roller and a lower spinning roller of the spinning device.

The novel high-speed spinning machine disclosed in the application solves the problem of shortage of production equipment of polyacrylonitrile filaments to a certain extent. However, the high-speed spinning machine disclosed in the application is too complex in structure, an independent washing device and an independent drying drafting roller need to be arranged between the two spinning rollers, the independent washing device and the independent drying drafting roller not only increase the production cost of the spinning machine, but also lead to the fact that the whole occupied space of the spinning machine is large, and the process flow of the whole spinning is complex and tedious, and the production efficiency is reduced.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the spinning machine among the prior art and need set up washing device and stoving roller alone and lead to that whole equipment structure is complicated, occupation space is big, manufacturing cost is high not enough, provides one kind and can accomplish the washing of strand silk, starching the polyacrylonitrile fiber spinning machine that oils, dries at spinning device for the structure of spinning machine is simplified more, occupation space is littleer, the cost of production is lower.

In order to achieve the object, according to the utility model discloses an aspect, the utility model discloses a following technical scheme:

the utility model provides a spinning device, includes the pair roller of constituteing by the first spinning roller of diameter difference and second spinning roller, and the strand silk passes through first spinning roller and second spinning roller in turn, and the strand silk is twined to the other end from the one end of pair roller, second spinning roller includes the washing section, realizes the washing to the strand silk through the water spray mechanism to the washing section water spray.

Furthermore, the washing section adopts non-heat-conducting corrosion-resistant material to make, water spray mechanism includes a plurality of washing nozzles, washing nozzle can be to washing section water jet stream.

Preferably, along the length direction of second spinning roller the interval is provided with a plurality of water-proof platforms in the circumference of washing section, forms one washing region between two water-proof platforms, the washing section forms multichannel washing region, and every washing region corresponds and is equipped with a washing nozzle.

Further, the below of the washing section of second spinning roller be provided with one with the periphery wall shape assorted of washing section retrieves the cover, it corresponds to retrieve the cover inner wall the position of water proof platform is provided with the space bar, forms a manifold between two adjacent space bars, the below of retrieving the cover be provided with the washing circulation jar of manifold one-to-one intercommunication.

Preferably, a suction pump is arranged between two adjacent washing circulation tanks, along the traveling direction of the strand silk, the washing water recovered from the washing circulation tank corresponding to the next washing area is sucked into the washing circulation tank corresponding to the previous washing area by the suction pump, and the washing circulation tanks are connected with the washing nozzles in a one-to-one correspondence manner.

Further, the second spinning roller still include with the washing section adopts the stoving section that different material materials made, along the path direction of strand silk, the washing section sets up in the anterior segment region of second spinning roller, the stoving section sets up in the back end region of second spinning roller, the strand silk is in the process the washing and the stoving of strand silk are accomplished in proper order during washing section and the stoving section.

Preferably, the tail end of the drying section is reduced in diameter, and the filament can be retracted and shaped when passing through the reduced diameter part of the drying section.

More preferably, the diameter reduction ratio of the tail end of the drying section is between 0 and 10 percent.

Further, the drying section is made of metal heat conduction materials, a heat conduction pipe is arranged in the second spinning roller, and a heating medium is injected into the heat conduction pipe;

or the drying section of the second spinning roller adopts an interlayer design, and a heating medium is injected into the interlayer;

or an electric heating wire is arranged in the second spinning roller, and the silk is dried by electrifying and heating the electric heating wire.

Furthermore, the second spinning roller also comprises an oiling section positioned between the washing section and the drying section, and the strand silk sequentially passes through the washing section, the oiling section and the drying section of the second spinning roller to finish the washing, sizing, oiling and drying of the strand silk;

preferably, the retention time proportion of the strand silk in the water washing section, the oiling section and the drying section is as follows: 8-10:1-2:2-4.

Further, the first spinning roller has a diameter d₁At a rotational speed of n₁The diameter of the second spinning roller is d₂At a rotational speed of n₂Wherein d is₂＞d₁，n₁/n₂＝d₂/d₁。

The utility model also provides a polyacrylonitrile fiber spinning machine with any one of the spinning devices, which comprises a frame, wherein the spinning device is arranged on the frame, and the polyacrylonitrile fiber spinning machine also comprises a forming device, the forming device comprises a coagulating bath groove and a primary washing groove, and formed strands obtained by the coagulating bath groove and the primary washing groove are wound on the pair rollers;

a drawing roller is arranged between the coagulating bath tank and the primary water washing tank, the diameter of the drawing roller is d, the rotating speed is n, and the diameter of the first spinning roller is d₁At a rotational speed of n₁Wherein: n/n₁＜d₁/d。

Furthermore, the drafting roller comprises an upper drafting roller and a lower drafting roller which are arranged between the coagulating bath and the primary washing tank from top to bottom, the strand silk coagulated and formed by the coagulating bath is wound and drafted between the upper drafting roller and the lower drafting roller under the guide of the yarn guide, and then enters the primary washing tank, and the strand silk secondarily formed by the secondary bath solution in the primary washing tank is wound on the pair rollers under the guide of the yarn guide.

Further, the spinning device is further included, and the forming device is positioned between the spinning device and the spinning device;

the spinning device comprises a plurality of spinning nozzles, each spinning nozzle comprises a spinning plate, a plurality of spinning holes are formed in each spinning plate, each spinning nozzle is located in the corresponding coagulating bath, and spinning stock solution sprayed out of each spinning nozzle sequentially passes through the coagulating baths for coagulating and forming and then enters the primary washing bath for secondary forming;

every M spinning nozzles correspond to a first spinning roller, wherein M is more than or equal to 1; preferably, M ═ 1.

The device comprises a plurality of rubber supply pipes and a plurality of metering pumps, wherein the rubber supply pipes and the metering pumps are connected in a one-to-one correspondence manner, and rubber outlets of the rubber supply pipes are connected with the plurality of spinning nozzles in a one-to-one correspondence manner;

the glue supply device further comprises a driving motor, the driving motor comprises a transmission shaft with a certain extending length, the plurality of metering pumps are respectively connected to the transmission shaft, and the transmission shaft of the driving motor drives the plurality of metering pumps simultaneously.

Further, the polyacrylonitrile fiber spinning machine is an acrylic fiber filament spinning machine or a carbon fiber precursor spinning machine;

preferably, the polyacrylonitrile fiber spinning machine is an acrylic fiber filament spinning machine.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:

1. the utility model provides a spinning device improves the structure of second spinning roller set up the washing section on the second spinning roller, can realize the washing to the strand silk through water spray mechanism to washing section water spray, let the further shaping of strand silk to guarantee the quality of strand silk, need not to set up washing device alone, reduced manufacturing cost, shortened whole process flow.

2. The utility model provides a spinning device is provided with a plurality of water-proof platforms at the interval on the washing section of second spinning roller form the multichannel washing region on the washing section, separate each washing through the water-proof platform that sets up, prevent that adjacent twice washing regional washing water from mixing, influence the cleaning performance of strand silk, because contain the solution in the coagulation bath on the strand silk, the washing nozzle can all wash some coagulation bath liquid on the strand silk when washing each washing region, makes more and more clean, improves the quality of strand silk. Through carrying out multiple independent water washes on the filament, the coagulant on the surface of the filament is washed away as much as possible, and the quality of the prepared polyacrylonitrile fiber is ensured. The water washing is carried out by adopting warm water, so that an ideal water washing effect can be achieved, the production energy consumption can be reduced to a certain extent, and the production cost is saved.

3. The utility model provides a spinning device, still be provided with the stoving section on the second spinning roller, the strand silk passes through the washing section and the stoving section of second spinning roller in proper order, accomplishes the washing and the stoving of strand silk for the production efficiency of spinning machine is higher, and need not to set up washing device and stoving roller alone, has simplified the structure of whole device, has reduced manufacturing cost, and the whole occupation space of spinning machine is littleer.

4. The utility model provides a polyacrylonitrile fiber spinning machine, supply mucilage binding to put including a plurality of measuring pumps, a plurality of measuring pumps are connected on same driving motor's transmission shaft, driving motor drives simultaneously a plurality ofly the measuring pump, all measuring pumps drive through a transmission shaft and guarantee that the revolution measurement is unanimous, improve the homogeneity of strand silk quality.

5. The utility model provides a polyacrylonitrile fiber spinning machine through the rotational speed of control draft roller, first spinning roller, second spinning roller for the speed that the strand silk got into a wash bowl is less than the speed that the strand silk left a wash bowl, maintains the same speed of marcing on spinning equipment and spins, makes only carry out a draft in a wash bowl among the whole process flow, and need not the draft many times, has shortened polyacrylonitrile fiber's production process flow, has improved the spinning speed, and then has improved production efficiency and output. Meanwhile, the condition that a plurality of water washing drafting grooves are required to be arranged for multiple times of drafting is avoided, production equipment is simplified, and production cost is reduced.

Drawings

FIG. 1 is a schematic diagram of six rollers of a polyacrylonitrile fiber spinning machine for simultaneous spinning in the embodiment;

FIG. 2 is a schematic structural view of a second spinning roller in the embodiment;

FIG. 3 is a partial structural plan view of the spinning machine with the second spinning roller removed in the example;

fig. 4 to 6 are schematic views showing three structures of the reducing section of the second spinning roller in the embodiment;

FIG. 7 is a schematic structural view of three threadlines running on the first spinning roller in the example;

wherein: 1. a drive motor; 2. a speed reducer; 3. a metering pump; 4. a spinneret; 5. a drive shaft; 6. a drawing roller; 7. a thread guide; 8. a coagulation bath; 9. a primary rinsing bath; 10. a small wire guide roller; 11. a second spinning roller; 11a, a water washing section; 11b, oiling section; 11c, a drying section; 11d, reducing the diameter; 111. a water-proof table; 112. a hollow roll shaft; 12. a first spinning roller; 13. an oil storage tank; 14. a filter; 15. a frame; 17. oiling a nozzle; 18. A recovery cover; 181. a partition plate; 182. a manifold; 183. a water outlet; 184. cleaning the opening; 19. a medium inlet pipe; 20. a medium return pipe; 21. washing the nozzle with water; 22. and (4) a switching connector.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail with reference to examples.

Example one

The embodiment provides a spinning device and a polyacrylonitrile fiber spinning machine with the same:

as shown in fig. 1 to 7, the present embodiment provides a spinning apparatus, which includes a pair of rolls including a first spinning roll 12 and a second spinning roll 11 having different diameters, wherein the diameter of the second spinning roll 11 is larger than that of the first spinning roll 12, a filament is sequentially and alternately passed through the first spinning roll 12 and the second spinning roll 11, the filament is wound from one end to the other end of the pair of rolls, and the second spinning roll 11 includes a water washing section 11a, and water is sprayed to the water washing section 11a by a water spraying mechanism to wash the filament.

Preferably, in the present embodiment, one second spinning roller 11 is provided corresponding to a plurality of first spinning rollers 12, and the diameter of the first spinning roller 12 is smaller than that of the second spinning roller 11. The multiple filament yarns on the multiple first spinning rollers 12 pass through different first spinning rollers 12 respectively and are converged on the same second spinning roller 11, so that the acting force of the filament yarns on the spinning device is controlled, and the filament yarns are prevented from being broken in the steps of washing and drying. The diameter of the second spinning roller 11 is larger, and the time for the filament to pass through the second spinning roller 11 is longer, so that the water washing of the filament can be fully carried out.

The spinning device that this embodiment provided improves second spinning roller 11's structure set up washing section 11a on the second spinning roller 11, can realize the washing to the strand silk through the water spray mechanism to washing section 11a water spray, let the further shaping of strand silk to guarantee the quality of strand silk, need not to set up water washing device alone, reduced manufacturing cost, shortened whole process flow.

Further, washing section 11a adopts non-heat-conducting corrosion-resistant material to make, water spray mechanism includes a plurality of washing nozzles 21, washing nozzles 21 can be to washing section 11a injection rivers, carries out the washing to the strand silk that passes through washing section 11a, washing nozzles 21 are fixed on frame 15.

Preferably, along the length direction of second spinning roller 11 the interval is provided with a plurality of water proof platforms 111 in the circumference of washing section 11a, water proof platform 111 can be for the annular form or the setting of semicircle ring-shaped on the periphery wall of washing section 11a, forms one washing region between two adjacent water proof platforms 111 washing section 11a forms multichannel washing region, and every washing region corresponds and is equipped with a washing nozzle 21.

In the spinning apparatus provided in this embodiment, as shown in fig. 2, a plurality of water-blocking tables 111 are arranged at intervals on the water washing section 11a of the second spinning roller 11, a plurality of water-washing areas are formed on the water washing section 11a, each water-washing area is separated by the water-blocking table 111, so that the washing water in two adjacent water-washing areas is prevented from mixing and affecting the washing effect of the filament, and because the filament contains the solution in the coagulation bath, when the filament passing through each water-washing area is washed by the water-washing nozzle 21, a part of the coagulation bath solution on the filament is washed away, so that the filament is cleaner and cleaner, and the quality of the filament is improved.

Further, as shown in fig. 1 to 3, a recovery cover 18 is disposed below the water washing section 11a of the second spinning roller 11, and the recovery cover 18 is matched with the outer peripheral wall of the water washing section 11a in shape, and the recovery cover 18 is covered on the outer peripheral wall of the bottom of the water washing section 11a of the second spinning roller 11 in an arc shape. Partition plates 181 are arranged on the inner wall of the recovery cover 18 corresponding to the water-proof table 111, a manifold 182 is formed between two adjacent partition plates 181, and the washing water in each washing area correspondingly falls down and flows back to the recovery cover 18 and the corresponding manifold 182.

Furthermore, a washing circulation tank which is communicated with the collecting cavities 182 in a one-to-one correspondence manner is arranged below the recovery cover 18, a plurality of communication ports are formed in the bottom wall of the recovery cover 18, the communication ports are in one-to-one correspondence with the positions of the collecting cavities 182 and are respectively communicated with the collecting cavities 182, a flow guide joint is connected below each communication port, a drain port 183 is arranged at the lower end of each flow guide joint, washing water in each collecting cavity 182 flows down through the drain port 183 under the action of gravity, and water in each collecting cavity 182 sequentially flows into the corresponding washing circulation tank through the communication ports, the flow guide joints and the drain ports 183, so that the washing water in each washing area after washing is independently recovered and recycled, and water resources are saved.

Preferably, a suction pump is arranged between two adjacent washing circulation tanks, along the running direction of the strand silk, the washing water recovered from the washing circulation tank corresponding to the next washing area is sucked into the washing circulation tank corresponding to the previous washing area by the suction pump, the washing circulation tank corresponding to the last washing area is communicated with tap water, and the washing circulation tanks are correspondingly connected with the washing nozzles 21 one by one. The washing water after washing of every in this application is retrieved alone to one washing water used behind is through the preceding washing recycling of suction pump supply, has not only practiced thrift the water resource, has still further guaranteed the cleaning performance of strand silk.

Further, in this embodiment, still seted up clearance mouth 184 on retrieving the diapire of cover 18, the clearance mouth 184 outside is provided with and can opens or close the clearance lid of clearance mouth 184, clearance mouth 184 is a plurality of, with manifold 182 one-to-one sets up. Because the second spinning roller 11 may drop some broken filament, thread scraps or other impurities in the process of long-time use, the user may open the cleaning cover periodically, and manually clean the impurity thread scraps in the manifold 182 through the cleaning port 184, so as to prevent the drainage port 183 from being blocked, and prevent the recovery cover 18 from draining water and the washing water circulation tank from normally collecting washing water.

In the above-described aspect, the washing water temperature of the second spinning roller 11 is 30 to 90 ℃, preferably, 50 ℃. The washing is easier because the denier of the acrylic fiber filament is small, and the washing effect is not needed to be increased by high temperature, so the washing temperature of the washing section 11a of the second spinning roller 11 is generally selected to be at a middle temperature level of 50 ℃, and the temperature is lower than that of the acrylic fiber staple fiber, thereby ensuring the washing effect and reducing the production energy consumption.

Further, second spinning roller 11 still include with washing section 11a adopts the stoving section 11c that different materials made, along the path direction of strand silk, washing section 11a sets up in the anterior segment region of second spinning roller 11, stoving section 11c sets up in second spinning roller 11's back end region, the strand silk is in the process wash section 11a and stoving section 11c time accomplish the washing and the stoving of strand silk in proper order, dry the strand silk through stoving section 11 c.

Further, as shown in fig. 2 and fig. 4 to fig. 6, the tail end of the drying section 11c is reduced in diameter to form a reducing section 11d, and the specific structure of the reducing section 11d may have the following schemes:

the first scheme is as follows: as shown in fig. 4, the end of the drying section 11c may be reduced in diameter by a step-segmented manner such that the diameter of each segment is gradually reduced to form the reduced diameter section 11 d.

The second scheme is as follows: as shown in fig. 2 and 5, the end of the drying section 11c may be reduced in diameter by gradually reducing the outer diameter into a frustum shape.

In the third scheme: as shown in fig. 6, the end of the drying section 11c is reduced in diameter by combining two reducing methods, namely a stepped sectional type and a frustum type.

The strand silk can retract and be fixed when passing through the diameter reducing part of the drying section 11c, and the diameter reducing section 11d is formed by reducing the tail end of the drying section 11c, so that the strand silk can retract and be oriented when passing through the diameter reducing section 11d, the curling and fixing processes are replaced, and the process flow is simplified.

Preferably, the diameter reduction ratio of the tail end of the drying section 11c is between 0 and 10%, and the tail end of the drying section 11c is reduced for strand retraction, so that the setting effect can be replaced.

The spinning device that this embodiment provided, washing section 11a and the stoving section 11c that set up on the second spinning roller 11, the strand silk passes through washing section 11a and the stoving section 11c of second spinning roller 11 in proper order, accomplishes the washing and the stoving of strand silk for the production efficiency of spinning machine is higher, and need not to set up a rinsing bath and stoving roller alone, has simplified the structure of whole device, has reduced manufacturing cost, and the whole occupation space of spinning machine is littleer.

The specific structure of the drying section 11c can be as follows:

in the first scheme, the drying section 11c is made of a metal heat conduction material, the drying section 11c is hollow inside, a heat conduction pipe is arranged in the second spinning roller 11 of the drying section 11c, and the heat conduction pipe is coiled on the inner wall of the second spinning roller 11 to increase the heating area. The drying section 11c is heated by the heating medium in the heat transfer pipe, thereby drying the filament wound thereon.

The heating medium is injected into the heat conduction pipe, the heating medium can be hot water, hot steam or heat conduction oil, one end of the heat conduction pipe is connected with a heating medium inlet pipe 19, the heating medium is injected into the heat conduction pipe through the heating medium inlet pipe 19, the other end of the heat conduction pipe is connected with a medium return pipe 20, and the heating medium in the heat conduction pipe is guided out and returned through the medium return pipe 20.

And in the second scheme, the drying section 11c is designed in a sandwich structure, hot water or hot steam or heat conducting oil is injected into the sandwich, and the medium inlet pipe 19 and the medium return pipe 20 are respectively communicated with the sandwich in the drying section 11 c. The drying section 11c is heated by the heating medium in the nip, thereby drying the filament wound thereon.

In the two schemes, the second spinning roller 11 is rotatably connected to the frame 15 through a hollow roller shaft 112, the medium inlet pipe 19 and the medium return pipe 20 can be fixed on the hollow roller shaft 112 through a transfer joint 22, and the medium inlet pipe 19 and the medium return pipe 20 respectively enter the second spinning roller 11 from one side end of the hollow roller shaft 112 close to the drying section 11c and are communicated with a heat conduction pipe or an interlayer on the inner wall of the second spinning roller 11.

And in the third scheme, an electric heating wire is arranged in the drying section 11c of the second spinning roller 11, and the drying of the silk strips is realized by electrifying and heating the electric heating wire. The electric heating wire also enters the second spinning roller 11 through the hollow roller shaft 112, and the silk strips wound on the drying section 11c are heated in an electric heating mode through the electric heating wire.

Preferably, in this embodiment, the heating temperature of the drying section 11c is T1-150 ℃. More preferably, the drying section 11c is heated at a temperature T1 ═ 140 ℃.

Further, the second spinning roller 11 further comprises an oiling section 11b located between the water washing section 11a and the drying section 11c, and the strand silk sequentially passes through the water washing section 11a, the oiling section 11b and the drying section 11c of the second spinning roller 11 to complete the water washing, sizing and oiling and drying of the strand silk.

Further, in the present embodiment, the washing section 11a is divided into 1-8 washing areas, and preferably, as shown in fig. 2, the washing section 11a is divided into 5 washing areas by the water-stop platform 111 at equal intervals, and the oiling section 11b is a sizing and oiling area located behind the last washing area of the washing section 11 a.

The strand silk passes through the water washing section 11a, the oiling section 11b and the drying section 11c of the second spinning roller 11 in sequence, and water washing, sizing oiling and drying of the strand silk are completed. Through the sizing process, the cohesive force of strand silk fibers is effectively increased, strand silk is prevented from dispersing, and static electricity between the strand silk is effectively eliminated through the oiling process.

Further, still including being used for giving the sizing oiling device that is located the strand silk sizing oiling of oiling section 11b, the sizing oiling device includes batch oil tank 13 and the nozzle 17 that oils that is connected with batch oil tank 13 through the pipeline, the storage has the thick liquids and the oil mixture liquid that mix in proportion in the batch oil tank 13, the position of nozzle 17 that oils with the position of oiling section 11b corresponds. The sizing and oiling device further comprises an oiling pump arranged on the oil storage tank 13, and the slurry mixed liquid in the oil storage tank 13 is pumped to the oiling nozzle 17 through a pipeline by the oiling pump. The oiling nozzle 17 and the washing nozzles 21 are arranged on the frame 15 side by side, and along the row diameter direction of the strand silk, the oiling nozzle 17 is positioned on the frame 15 behind the last washing nozzle 21.

Preferably, the retention time ratio of the threadlines in the water washing section 11a, the oiling section 11b and the drying section 11c is 8-10:1-2: 2-4.

Further, the first spinning roller 12 has a diameter d₁At a rotational speed of n₁The diameter of the second spinning roller 11 is d₂At a rotational speed of n₂Wherein d is₂＞d₁，n₁/n₂＝d₂/d₁. By controlling the rotating speed ratio of the first spinning roller 12 to the second spinning roller 11 to be equal to the diameter ratio of the first spinning roller 12 to the second spinning roller 11, the running speed of the strand silk on the first spinning roller 12 and the second spinning roller 11 is the same, and the strand silk is ensured not to be drafted in the process of passing through the first spinning roller 12 and the second spinning roller 11.

The running speeds of the filament passing through the first spinning roller 12 and the second spinning roller 11 can be the same by the following two schemes:

the first scheme is as follows: the first spinning roller 12 and the second spinning roller 11 are respectively driven by different spinning motors, the first spinning roller 12 is driven by the first spinning motor, the second spinning roller 11 is driven by the second spinning motor, and the rotating speed n of the first spinning motor is controlled₁With the rotation speed n of the second spinning motor₂Is equal to the diameter d of the second spinning roller 11₂With the diameter d of the first spinning roller 12₁The ratio of (a) to (b) can be calculated by the linear velocity calculation formula, and the velocity of the filament passing through the first spinning roller 12 and the second spinning roller 11 is the same.

Scheme II: the first spinning roller 12 and the second spinning roller 11 are driven by the same spinning motor, a first gear and a second gear are respectively arranged on an output shaft of the spinning motor corresponding to the first spinning roller 12 and the second spinning roller 11, and the first gear and the second gear are respectively arranged on the output shaft of the spinning motorThe number of teeth is same as X, and the rotating speed of the spinning motor is N. A first matching gear is arranged on the roll shaft of the first spinning roll 12 corresponding to the first gear, and the tooth number of the first matching gear is X₁At a rotational speed of n₁. A hollow roll shaft of the second spinning roll 11 is provided with a second matching gear corresponding to the second gear, and the tooth number of the second matching gear is X₂At a rotational speed of n₂。

The first gear and the first matching gear are in transmission connection through a first gear belt, the second gear and the second matching gear are in transmission connection through a second gear belt, and the number of teeth of the first gear/the second gear is X, the rotating speed of the spinning motor is X, the number of teeth of the first matching gear is X₁X the number of teeth X of the second counter gear, n1 of the first spinning roller 12₂X the rotational speed n of the second spinning roller 11₂。

According to a linear velocity calculation formula: the speed V of the filament on the first spinning roller 12₃Pi × the speed n of the first spinning roller 12₁X diameter d of the first spinning roll 12₁Speed V of the yarn on the second spinning roller 11₄Pi × rotation speed n of the second spinning roller 11₂X diameter d of the second spinning roller 11₂。

Through the conversion between the formulas, when the teeth numbers of the first gear and the second gear are the same, the tooth number X of the second matching gear is controlled₂Number of teeth X of first engaging gear₁Is equal to the diameter d of the second spinning roller 11₂With the diameter d of the first spinning roller 12₁The ratio ensures that the speed of the filament passing through the first spinning roller 12 and the second spinning roller 11 is the same.

In the embodiment, oiling is easier because the total denier number of the denier of the acrylic fiber filament is small, and the oiling effect is not needed to be increased by high temperature, so that normal-temperature sizing oiling is usually adopted, and the energy consumption is reduced while the effect is ensured.

The embodiment also provides a polyacrylonitrile fiber spinning machine with above-mentioned spinning device, including frame 15, be provided with above-mentioned spinning device on the frame 15, still include forming device, forming device includes coagulating bath groove and a rinsing bath, adorns through the shapingThe formed silk strips obtained from the middle coagulating bath 8 and the primary washing tank 9 are wound on the pair of rollers; a drawing roller 6 is arranged between the coagulating bath 8 and the primary washing tank 9, the diameter of the drawing roller 6 is d, the rotating speed is n, and the diameter of the first spinning roller 12 is d₁At a rotational speed of n₁Wherein: n/n₁＜d₁And d. Through the design and the linear velocity calculation formula V₁＝π×n×d，V₂＝π×n₁×d₁The speed V of the strand silk entering the primary washing tank 9 can be known₁Less than the speed V of the formed filament leaving the primary washing tank 9₂Thereby completing one drawing in the one-time water washing tank 9.

In the above-described embodiment, the diameter d of the draft roller 6 may be set to be the same size as the diameter d1 of the first spinning roller 12, that is, d ═ d₁And the rotation speed n of the driving motor for driving the drafting roller 6 to rotate is controlled to be less than the rotation speed n of the first spinning roller 12₁I.e. n < n₁Then the speed V of the filament passing through the drafting roller 6 can be obtained by the linear velocity formula₁Less than the running speed V of the filament on the first spinning roller 12₂The yarn is positively drawn between the drawing roller 6 and the first spinning roller 12.

The above is merely an example of a speed V at which the strand is introduced into the primary washing tank 9₁Less than the speed V of the formed filament leaving the primary washing tank 9₂But is not limited thereto. For example, the diameter d of the draft roller 6 and the diameter d of the first spinning roller 12 may be set to be equal₁The rotating speed n of a driving motor for driving the drafting roller 6 to rotate and the rotating speed n of a spinning motor for driving the first spinning roller 12 to rotate are regulated and controlled to be different in size₁In such a manner that the speed V of the yarn strip passing through the drawing roller 6₁Less than the running speed V of the filament on the first spinning roller 12₂。

Further, the draft roller 6 includes an upper draft roller and a lower draft roller which are vertically disposed between the coagulation bath 8 and the primary washing tank 9, and the filament solidified and formed in the coagulation bath 8 is wound and drafted between the upper and lower draft rollers under the guide of the yarn guide 7, and then enters the primary washing tank 9, and the filament secondarily formed in the secondary washing tank 9 is wound on the counter roller under the guide of the yarn guide 7.

In the scheme, the temperature of the acrylic fiber filament coagulation bath is controlled to be 40-70 ℃, the temperature of the acrylic fiber filament coagulation bath is controlled to be higher than that of acrylic fiber short fibers, and the main factor is that the forming speed can be accelerated by controlling the temperature of the coagulation bath to be high, so that the spinning speed of the spinning machine is improved. The concentration of the acrylic filament coagulation bath in the embodiment is 40-70%, and the concentration is controlled to be high mainly for ensuring more sufficient forming and the quality of filament. The acrylic fiber filament has small denier, so that high spinning speed can be achieved, and the forming quality requirement is high, so that the features of slow forming and high spinning efficiency are ensured, and the balance point is adjusted by controlling the temperature and concentration of the coagulation bath.

The washing tank 9 of a time that adds in this embodiment is in order to let the strand silk further shaping, guarantees the strand silk quality, promotes the draft effect simultaneously, has avoided spinneret 4 direct draft to cause the strand silk fracture to can't reach the draft effect in the coagulation bath.

Further, the spinning device is further included, and the forming device is located between the spinning device and the spinning device. The spinning device comprises a plurality of spinning nozzles 4, each spinning nozzle 4 comprises a spinning plate, a plurality of spinning holes are formed in each spinning plate, each spinning nozzle 4 is located in the corresponding coagulating bath 8, and spinning stock solution sprayed out of each spinning nozzle enters the corresponding primary washing tank 9 to be secondarily formed after being coagulated and formed through the coagulating baths 8 in sequence. The residence time of the filament in the coagulation bath 8 is 3-10S.

In this embodiment, there is one first spinning roller 12 for every M spinnerets 4, where M.gtoreq.1. For example, two first spinning rolls 12 may be provided for every two spinnerets 4, and two filaments may run on each first spinning roll 12, or as shown in fig. 1 and 7, three first spinning rolls 12 may be provided for every three spinnerets 4, and three filaments may run on each first spinning roll 12.

In one embodiment of the above scheme, the first spinning roller 12 includes a first spinning roller main body capable of spinning at least two filament yarns simultaneously, from one end to the other end of the first spinning roller main body, a plurality of spiral yarn feeding grooves are spirally formed on the peripheral wall of the first spinning roller main body, and two adjacent spiral yarn feeding grooves are independently arranged for independent yarn feeding. The spiral filament running groove is spiral, and extends from one end of the first spinning roller body to the other end along the axial direction of the first spinning roller body, the path of the spiral filament running groove is the same as the path of the filament strands, and the filament strands can run on the spinning roller along the paths of the spiral filament running grooves corresponding to the filament strands, so that the phenomenon of doubling of the filament strands when the filament strands run on the same first spinning roller 12 is avoided.

Further, in one embodiment, the first spinning roller body can spin two filament bundles simultaneously, and the spiral filament running groove comprises a first spiral filament running groove and a second spiral filament running groove which can run each filament bundle independently, and the first spiral filament running groove and the second spiral filament running groove spirally extend from one end to the other end of the first spinning roller body. Preferably, the bottom walls of the first spiral filament running groove and the second spiral filament running groove are different in vertical distance from the central axis of the first spinning roller main body, and the first spiral filament running groove and the second spiral filament running groove are in a high-low state through the design, so that filament strands are further prevented from sliding from one spiral filament running groove to the other spiral filament running groove, and the filament doubling probability is further reduced.

Furthermore, a spiral boss which extends from one end of the first spinning roller main body to the other end in a spiral manner is arranged on the peripheral wall of the first spinning roller main body, and the first spiral filament feeding groove is formed in the spiral boss; and the groove structure formed between the adjacent two circles of spiral bosses and the peripheral wall of the first spinning roller main body forms the second spiral filament feeding groove. Because spiral boss protrusion sets up in first spinning roller main part periphery wall, consequently, the height that the silk groove was walked to first spiral will be higher than the silk groove is walked to the second spiral apart from first spinning roller main part central axis's height, and two strand silks are walked in the silk groove at two of difference in height and are moved, the phenomenon of being difficult for appearing doubling.

Preferably, in this embodiment, M is 1, the number of the spinnerets 4 is the same as that of the first spinning rollers 12, the spinnerets 4 and the first spinning rollers 12 are arranged in one-to-one correspondence, and the dope discharged through the spinnerets 4 passes through the coagulation bath 8 and the primary washing tank 9 and then is wound around the first spinning rollers 12 one by one.

Furthermore, the number of the spinneret orifices is 10-100, and the aperture of the spinneret orifices is 40-100 μm. The stock solution of the spinning nozzle 4 is discharged at the glue discharging temperature of 50-99 ℃ and the spraying speed is 10-80 m/min.

Further, still including supplying mucilage binding and putting, supply mucilage binding and put including the confession rubber tube and the measuring pump 3 that the one-to-one is connected, confession rubber tube and measuring pump 3 are a plurality of, the play jiao kou one-to-one of confession rubber tube is connected a plurality of the spinneret. Be provided with filter 14 on the confession rubber tube, filter 14 through the setting effectively filters the impurity in the magma, further guarantees the quality of strand silk.

Further, the glue supply device further comprises a driving motor 1, an output end of the driving motor 1 is connected with a speed reducer 2, the driving motor 1 comprises a transmission shaft 5 with a certain extending length, the plurality of metering pumps 3 are respectively connected onto the transmission shaft 5, and the transmission shaft 5 of the driving motor 1 drives the plurality of metering pumps 3. In this scheme, driving motor 1 drives a plurality ofly simultaneously measuring pump 3, all measuring pumps 3 drive through a transmission shaft 5 and guarantee that the revolution measurement is unanimous, improves the homogeneity of strand silk quality.

Preferably, the glue supply device is 4-8 sets and is in one-to-one corresponding fit connection with the spinning device, one end of the glue supply tube is connected with the metering pump 3, the other end of the glue supply tube is connected with the spinning device, and the number of the glue supply tube, the metering pump 3 and the filter 14 is 4-8. The 4-8 metering pumps 3 are arranged in a straight line, the metering pumps 3 are respectively connected to the transmission shafts 5, and the transmission shafts 5 of the driving motor 1 drive the 4-8 metering pumps 3 simultaneously. The spinning device is 4-8 sets, and comprises 4-8 spinning nozzles 4 which are correspondingly connected with the 4-8 glue supply pipes one by one.

Furthermore, the pair rollers are in multiple groups, each pair roller comprises 1 second spinning roller 11 and 4-8 first spinning rollers 12, the second spinning rollers 11 and each first spinning roller 12 are in one-to-one correspondence to form 4-8 groups of pair rollers, the spinning device and the forming device are 4-8 sets, 4-8 silk strips are correspondingly formed, and the silk strips are respectively wound on each group of pair rollers.

The spinning machine provided by the embodiment adopts a module form, one group of modules can complete the whole spinning process, and 6 spindle positions of each group of modules can be increased and decreased properly. One spinning line can be arranged by combining a plurality of groups of modules to increase the total spindle position, the spinning nozzles 4 correspond to the number of spindle positions, and each spindle position is provided with a metering pump 3.

In this embodiment, the filament finishes the drafting process between the upper and lower drafting rollers and finishes the secondary washing of the filament, so as to remove the residual coagulation bath solution on the filament more effectively and ensure the cleaning effect of the filament.

In this embodiment, a spinning line can be composed of 40 spinning modules to form 240 spindle positions, and a coagulation bath, water washing and oiling and sizing circulation system can be realized by using one system, one pump and one tank, so that the use amount of equipment is reduced.

It should be noted that the polyacrylonitrile fiber spinning machine provided in this example may be an acrylic fiber spinning machine for making acrylic fibers, and may also be a carbon fiber precursor spinning machine for carbon fiber precursors.

Because the total denier of the acrylic fiber filament is less, the advantage is more obvious when the polyacrylonitrile fiber spinning machine of the embodiment is adopted to prepare the acrylic fiber filament, the production cost of the acrylic fiber filament can be reduced to a great extent, and the quality of the prepared acrylic fiber filament is ensured. Therefore, the polyacrylonitrile fiber spinning machine in this embodiment is preferably an acrylic fiber spinning machine for making acrylic fiber filaments.

Example two

The embodiment provides a process for preparing polyacrylonitrile fibers by using the polyacrylonitrile fiber spinning machine in the embodiment one on the basis of the embodiment one.

A preparation process of polyacrylonitrile fiber comprises the following steps:

spinning the spinning solution by a spinning device;

forming the sprayed spinning solution by a forming device to obtain filaments;

and washing and drying the formed strand silk to obtain the polyacrylonitrile fiber.

In order to realize the preparation process of the polyacrylonitrile fiber in this embodiment, a spinning machine as shown in fig. 1 to 3 is used to prepare the polyacrylonitrile fiber. The spinning machine comprises a frame 15, a spinning device for spinning the spinning solution, a forming device for forming the spun spinning solution into filaments, and a spinning device for performing subsequent treatment on the formed filaments to obtain the polyacrylonitrile fibers. The forming device comprises a coagulating bath 8 and a primary washing tank 9, and the forming by the forming device specifically comprises that the sprayed spinning solution passes through the coagulating bath 8 and the primary washing tank 9 in the forming device in sequence to obtain formed filaments. The spun dope is coagulated and formed into filaments by the coagulating liquid in the coagulating bath 8, and the filaments coagulated and formed by the coagulating liquid are secondarily formed by the two-bath solution in the primary washing bath 9.

Speed V of the strand silk entering the primary washing tank 9₁Less than the speed V of the formed filament leaving the primary washing tank 9₂Thereby completing one drawing in the one-time water washing tank 9. The formed strand silk always keeps the same advancing speed in the subsequent steps, namely, the formed strand silk is not drawn any more, and finally the polyacrylonitrile fiber is obtained.

In order to draft the filament in the primary washing tank 9, as shown in fig. 1 to 3, the spinning machine used in this embodiment further includes a draft roller 6 between the coagulation bath 8 and the primary washing tank 9, and the draft roller 6 includes an upper draft roller and a lower draft roller which are vertically disposed. The formed filaments enter a spinning device comprising a first spinning roller 12 and a second spinning roller 11 mounted on a frame 15.

Specifically, the filament coagulated and molded in the coagulation bath 8 is wound between the upper and lower draft rollers under the guide of the yarn guide 7, and then enters the primary washing tank 9, and the filament after being washed with water in the primary washing tank 9 is wound around the first spinning roller 12 under the guide of the yarn guide 7 and the small yarn guide roller 10.

The rotational linear velocity V of the first spinning roller 12 is controlled by controlling the rotational speeds of the upper and lower drawing rollers of the drawing roller 6 and the first spinning roller 12 of the spinning device₂Larger than the upper and lower drafting rollersRotational linear velocity V of₁The effect of drawing the filament between the two, that is, the filament in the secondary bath solution in the primary washing tank 9 can be achieved. In this embodiment, V is controlled₁:V₂The sliver is drafted by 3 to 10 times, preferably V, 1:3 to 10₁:V₂The sliver was drawn 5 times at 1: 5.

In the scheme, the speed of the strand silk entering and exiting the primary washing tank 9 and the advancing speed in the subsequent steps are controlled, so that the whole process flow is only subjected to primary drafting in the primary washing tank without multiple drafting, the production process flow of the polyacrylonitrile fiber is shortened, the spinning speed is improved, and the production efficiency and the yield are further improved. Meanwhile, the condition that a plurality of water washing drafting grooves are required to be arranged for multiple times of drafting is avoided, production equipment is simplified, and production cost is reduced. The drafting of the strand silk is finished in the two-bath solution, so that the condition that the strand silk is not fully formed and broken after being spun and the drafting effect cannot be achieved is avoided.

In a further aspect of this embodiment, the concentration of the coagulant in the coagulation liquid is higher than the concentration of the coagulant in the two-bath solution. Preferably, the temperature of the solidification liquid is 30-80 ℃, wherein the concentration of the coagulant is 40-70%. The temperature of the two-bath solution is 90-100 ℃, wherein the concentration of the coagulant is 0-20%.

In the above scheme, the concentration of the coagulant in the coagulation liquid is higher, so that the filaments can be subjected to secondary forming when passing through the primary washing tank 9, and the coagulant on the filaments can be washed off to a certain extent, so that a better washing effect can be achieved when the filaments are washed with water subsequently. By controlling the concentration and temperature of the coagulating liquid and the two-bath solution, the ideal drafting effect can be achieved by one-time drafting.

Specifically, the forming speed of the filament can be increased by increasing the temperature of the coagulating liquid, so that the spinning speed is increased, the concentration of the coagulating agent is increased, the forming is more sufficient, and the quality of the filament is ensured. When the preparation process of the embodiment is adopted for preparing the acrylic filament, the total denier number of the acrylic filament is small, so that higher spinning speed can be achieved, and meanwhile, the requirement on the forming quality is high, so that the stable and smooth forming and the high spinning speed are ensured in the production of the acrylic filament, and the balance between the forming speed and the spinning speed can be achieved through the control of the temperature and the concentration of the coagulation bath.

Furthermore, in the embodiment, the time for the filament to pass through the coagulating bath 8 is 3-10 s.

The coagulant used in this embodiment is one of dimethylformamide, dimethylacetamide, dimethyl sulfoxide, ethylene carbonate, sodium thiocyanate, nitric acid, or zinc chloride.

In a further embodiment of the present embodiment, the first spinning roller 12 and the second spinning roller 11 have different diameters, and the formed yarn obtained by the forming device is washed with water on the second spinning roller 11 by passing through the first spinning roller 12 and the second spinning roller 11 alternately. The first spinning roller 12 and the second spinning roller 11 rotate at the same linear speed, and the filament is not drafted in the process of passing through the first spinning roller 12 and the second spinning roller 11.

Preferably, in the present embodiment, one second spinning roller 11 is provided corresponding to a plurality of first spinning rollers 12, and the diameter of the first spinning roller 12 is smaller than that of the second spinning roller 11. The silk strips are divided into a plurality of silk strips, the silk strips pass through different first spinning rollers 12 respectively and then are gathered on the same second spinning roller 11, so that the acting force of the silk strips in a spinning device is controlled, and the silk strips are prevented from being broken in the steps of washing and drying. The diameter of the second spinning roller 11 is larger, and the time for the filament to pass through the second spinning roller 11 is longer, so that the water washing of the filament can be fully carried out.

In this embodiment, the threadline passes through the second spinning roller 11 and completes the water washing step, and a water washing device does not need to be separately arranged in the spinning device to wash the threadline, for example, a water washing tank for the threadline to pass through is added between the first spinning roller 12 and the second spinning roller 11. Therefore, the structure of production equipment is further simplified, the production cost is reduced, the process steps for preparing the polyacrylonitrile fiber are simplified, and the production efficiency of the polyacrylonitrile fiber is improved.

Further, the water washing is performed by spraying water to the filament on the second spinning roller 11.

Specifically, as shown in fig. 1 to 3, the second spinning roller 11 is provided with a water washing section 11a, and the spinning machine further includes a water spraying mechanism for spraying water to the filament wound around the water washing section 11a to wash the filament. The washing section 11a is made of a non-heat-conductive corrosion-resistant material, the water spraying mechanism comprises a plurality of washing nozzles 21, and the washing nozzles 21 can spray water to the washing section 11a, so that the filaments wound on the washing section 11a are washed. The water washing nozzle 21 is fixed to the frame 15.

In a preferred embodiment of the present embodiment, the formed yarn passes through a plurality of washing zones in the washing section 11a of the second spinning roller 11 in sequence, and the yarn is washed in a plurality of independent washing zones by spraying water to the yarn in the plurality of washing zones.

In order to realize the multiple independent water washes, the spinning machine of the present embodiment is provided with a plurality of water isolation platforms 111 at intervals in the circumferential direction of the water wash section 11a along the length direction of the second spinning roller 11, and the water isolation platforms 111 may be in a ring shape or a semicircular ring shape and are disposed on the outer circumferential wall of the water wash section 11 a. A washing area is formed between two adjacent water-proof tables 111, so that a plurality of washing areas are formed in the washing section 11a, and each washing area is correspondingly provided with one washing nozzle 21.

In the above scheme, each washing area is separated by the arrangement of the water isolation platform 111, so that the washing water in two adjacent washing areas is prevented from being mixed to influence the washing effect of the silk strips. The formed yarn contains a coagulant solution for forming the spinning dope into a yarn, and the water washing nozzle 21 washes away a part of the coagulant solution from the yarn when the yarn passing through each washing zone is washed with water. Through carrying out multichannel mutually independent washing to the strand silk for the strand silk is cleaner more and more, and then has improved the quality of strand silk.

In this embodiment, the temperature of washing the silk strips is 30-90 ℃. When the scheme of the embodiment is adopted to prepare the acrylic fiber filament, the water washing temperature is selected to be a middle temperature level and is lower than the water washing temperature in the preparation process of the acrylic fiber staple fiber. Because the total denier of the acrylic fiber filament is small, the washing is easier, the ideal washing effect can be achieved by adopting medium-temperature washing, and the washing effect does not need to be increased by using high-temperature washing water. Meanwhile, the slightly lower washing temperature reduces the production energy consumption to a certain extent and saves the production cost.

Further, in this example, the washing water used for washing the yarn was recovered and reused for washing the yarn. Specifically, as shown in fig. 1 to 5, a recovery cover 18 is provided under the water washing section 11a of the second spinning roller 11 to match the shape of the outer peripheral wall of the water washing section 11a, and the recovery cover 18 is provided in an arc shape to cover the outer peripheral wall of the bottom of the water washing section 11a of the second spinning roller 11. Partition plates 181 are arranged on the inner wall of the recovery cover 18 corresponding to the water-proof platform, a manifold 182 is formed between two adjacent partition plates 181, and the cleaning water after washing in each washing area correspondingly falls and flows back to the recovery cover 18 and the corresponding manifold 182.

Furthermore, a water washing circulation tank which is communicated with the collecting cavities 182 in a one-to-one correspondence manner is arranged below the recovery cover 18, a plurality of communication ports are formed in the bottom wall of the recovery cover 18, and the communication ports are communicated with the collecting cavities 182 in a one-to-one correspondence manner and respectively. A flow guide joint is connected below the communicating port, a lower water outlet 183 is arranged at the lower end part of the flow guide joint, the cleaning water in the collecting cavities 182 flows down through the lower water outlets 183 under the action of gravity, and the water in each collecting cavity 182 sequentially passes through the communicating port, the flow guide joint and the lower water outlet 183 to enter the corresponding water cleaning circulation tank, so that the cleaning water in each water cleaning area after being cleaned is independently recovered. The water washing circulation tanks are connected with the water washing nozzles 21 in a one-to-one correspondence manner, so that the washing water is recycled, and water resources are saved.

Preferably, a suction pump is arranged between two adjacent washing circulation tanks, along the advancing direction of the strand silk, the washing water recovered from the washing circulation tank corresponding to the next washing area is sucked into the washing circulation tank corresponding to the previous washing area by the suction pump, and the washing circulation tank corresponding to the last washing area is communicated with tap water. In the embodiment, the cleaning water after each washing is independently recovered, the cleaning water used in the next washing is supplied to the previous washing through the suction pump for recycling, and tap water is used for supplying the cleaning water in the last washing.

Because the strand silk in the next washing area is cleaner than the previous washing area, the content of the coagulant solution in the recovered washing water is less, and the ideal washing effect can be achieved when the coagulant solution is used for washing the strand silk in the previous washing area. Therefore, water resources are saved, and the cleaning effect of the strand silk is further ensured.

In a further embodiment of this embodiment, as shown in fig. 1 to 7, the filaments after being washed with water travel toward the end of the second spinning roller 11, and are dried by passing through a drying section 11c having a heating function on the second spinning roller 11. The drying temperature is 90-150 ℃.

In this embodiment, the second spinning roller 11 further includes a drying section 11c made of a material different from that of the water washing section 11a, the water washing section 11a is disposed in a front section of the second spinning roller 11, and the drying section 11c is disposed in a rear section of the second spinning roller 11 along the running direction of the filament. After the washing, the strand silk passes through the drying section 11c, and the drying section 11c heats the wound strand silk to dry the strand silk.

In a preferable embodiment of the present embodiment, the dried yarn is drawn and set at the end of the second spinning roller 11, and the ratio of yarn draw-back is 0% to 10%. Specifically, the end of the drying section 11c is reduced in diameter so that the filament strands can be set by retraction when passing through the reduced diameter portion of the drying section 11 c. The diameter reduction ratio of the end of the drying section 11c is 0% to 10%, preferably 0% to 5%.

In the above scheme, the drying of the strand silk is also carried out on the second spinning roller 11, and a drying roller is not required to be independently arranged, so that the structure of the production equipment and the process flow for preparing the polyacrylonitrile fiber are further simplified, the production cost is saved, and the production efficiency is improved. The dried filament yarns are retracted and shaped at the tail end of the second spinning roller 11 to replace the curling and shaping processes of the fibers, so that the shaping effect of the fibers is achieved, and the production process is further simplified.

In a further scheme of this embodiment, sizing and oiling are performed on the second spinning roller 11 before the washed strands enter the drying section 11c, and the sized and oiled strands enter the drying section 11c to be dried. Preferably, the sizing and oiling are performed by spraying a slurry mixture to the filaments washed by the water on the second spinning roller 11.

In order to realize sizing and oiling of the silk strips, the second spinning roller 11 further comprises an oiling section 11b positioned between the washing section 11a and the drying section 11c, and the spinning machine further comprises a sizing and oiling device arranged on the frame 15. The sizing and oiling device comprises an oil storage tank 13 and an oiling nozzle 17 connected with the oil storage tank 13 through a pipeline, oil and slurry mixed liquid formed by mixing oil and slurry in proportion is stored in the oil storage tank 13, and the position of the oiling nozzle 17 corresponds to the position of the oiling section 11 b. The oiling section 11b of the second spinning roller 11 is sprayed with the slurry mixture liquid through the oiling nozzle 17, thereby sizing and oiling the filament wound on the oiling section 11 b.

Among the above-mentioned scheme, the process of oiling to the silk has eliminated the static between the silk thread effectively, and the starching process has increased the cohesive force between the silk thread, has prevented the divergence of silk thread effectively through the silk thread sizing oiling after to the washing. The silk strips wound on the oiling section 11b of the second spinning roller 11 are subjected to sizing and oiling in a mode of spraying oil slurry mixed liquid, an oil groove does not need to be independently arranged, and the structure and the production process of production equipment are further simplified.

When the scheme of the embodiment is adopted to prepare the acrylic fiber filament, the total denier number of the acrylic fiber filament is less, and oiling is easier, so that the oiling effect is improved without adopting high-temperature oil slurry mixed liquor. The normal-temperature oil slurry mixed liquid is adopted for sizing and oiling, so that the oiling effect is ensured, and the production energy consumption is reduced.

In a preferred embodiment of the present invention, the formed filament is advanced from the front end to the tail end on the second spinning roller 11, and passes through the water washing section 11a, the oiling section 11b and the drying section 11c in sequence, so as to perform water washing, sizing and oiling, and drying in sequence. The respective lengths of the water washing section 11a, the oiling section 11b and the drying section 11c are controlled, so that the time of the strand silk passing through the three sections is controlled, and the time proportion of the strand silk for water washing, sizing oiling and drying is further controlled.

In this embodiment, set up through water proof platform 111 and separate washing section 11a for 1 ~ 8 washing regions to carry out 1 ~ 8 mutually independent washes to the strand silk, the section 11b that oils sets up to 1 and pastes the oil region, carries out 1 to the strand silk and pastes the oil. The time ratio of the strand silk passing through the water washing section 11a, the oiling section 11b and the drying section 11c, namely the time ratio of the strand silk to be washed, sized, oiled and dried is 1-10: 0.5-2: 1-4, and preferably 8-10:1-2: 2-4.

In a further scheme of this embodiment, spinning by the spinning device specifically includes that the spinning dope enters the spinning device and is then ejected from a plurality of spinning holes on the spinning device. The temperature of the spinning solution sprayed out of the spinneret orifice is 50-99 ℃, and the spraying speed is 10-80 m/min.

Specifically, as shown in fig. 1 to 3, the spinning device includes a plurality of spinnerets 4, and the spinnerets 4 include a spinneret plate having a plurality of spinning holes. The spinneret 4 is positioned in the coagulation bath 8 and directly sprays the filaments into the coagulation bath 8. Preferably, the number of the spinneret orifices is 10-100, and the aperture of the spinneret orifices is 40-100 mu m.

In the scheme, the sprayed spinning solution directly enters the solidification solution, and is solidified and formed to form the filament under the action of the solidification solution. The temperature and the speed of the spinning are controlled to effectively prevent the occurrence of broken filaments and ensure the continuity of the spinning. By controlling the number of the spinneret orifices to be less, filament strips of monofilament fibers can be formed after spinneret, and the method is particularly suitable for preparing acrylic filaments, and the obtained acrylic filaments can be directly used for knitting or weaving to produce textile fabrics without cutting and spinning the filament strips and then used for weaving.

Further, in this embodiment, by controlling the spinning speed and the rotational speeds of the upper and lower draft rollers of the draft roller 6 so that the rotational linear speeds of the upper and lower draft rollers are made smaller than the spinning speed, the filaments in the coagulation bath 8 can be made into a negative draft state, and the filaments can be prevented from being broken in the coagulation bath 8.

Further, the spinning machine used in this embodiment further includes a glue supply device for supplying the spinning dope into the spinneret 4. The glue supply device comprises a plurality of glue supply pipes and a plurality of metering pumps 3 which are connected in a one-to-one correspondence manner. The filter 14 is arranged on the rubber supply pipe, impurities in the spinning solution can be effectively filtered through the filter 14, and the quality of the filament is further ensured.

The glue supply device further comprises a driving motor 1, and the output end of the driving motor 1 is connected with a speed reducer 2. The driving motor 1 comprises a transmission shaft 5 with a certain extending length, the plurality of metering pumps 3 are respectively connected to the transmission shaft 5, and the transmission shaft 5 of the driving motor 1 drives the plurality of metering pumps 3 simultaneously. In this embodiment, a plurality of measuring pumps 3 are driven simultaneously to driving motor 1, and all measuring pumps 3 drive through a transmission shaft 5 and guarantee that the revolution measurement is unanimous, improves the homogeneity of strand silk quality.

The spinning machine used in the embodiment adopts a module form, one group of modules can complete the whole spinning process, and 6 spindle positions of each group of modules can be increased and decreased properly. One spinning line can be arranged by combining a plurality of groups of modules to increase the total spindle position, the spinning nozzles 4 correspond to the number of spindle positions, and each spindle position is provided with a metering pump 3.

In a further aspect of this embodiment, the dope is defoamed before being spun. Preferably, the spinning solution is defoamed by adopting a continuous defoaming mode, and the defoaming time is 30-300 min.

In the scheme, the defoaming process can improve the uniformity of the spinning solution, so that the uniformity of the yarn quality is improved, and the phenomena of yarn breakage and root shortage caused by the existence of bubbles are prevented.

The preparation process of the polyacrylonitrile fiber provided by the embodiment shortens the process flow for preparing the polyacrylonitrile fiber, improves the production efficiency of the polyacrylonitrile fiber, and saves the production cost of the polyacrylonitrile fiber by simplifying the structure of production equipment and reducing the production energy consumption. The preparation process in the embodiment is suitable for various types of polyacrylonitrile fibers, including but not limited to acrylic staple fibers, acrylic filament fibers and polyacrylonitrile-based carbon fiber precursor fibers. Because the total denier number of the acrylic fiber filament among the three is less, the preparation process has more obvious advantages when being adopted for preparation, the production cost of the acrylic fiber filament can be reduced to a great extent, and the quality of the prepared acrylic fiber filament is ensured.

The embodiment also provides the polyacrylonitrile fiber, and the breaking strength of the polyacrylonitrile fiber is 2.5-7.0 dN.

The polyacrylonitrile fiber is obtained by spinning and molding the spinning solution to obtain strands, the strands are drawn once in the molding process, and the molded strands are washed and dried to obtain the polyacrylonitrile fiber.

In a further aspect of this embodiment, the polyacrylonitrile fiber is produced by the preparation process of polyacrylonitrile fiber described in the first embodiment.

Preferably, the fineness of the polyacrylonitrile fiber in the embodiment is 40 to 320dtex, and the fineness of the single fiber is 1 to 10 dtex.

Preferably, the polyacrylonitrile fiber is an acrylic fiber filament, and the polyacrylonitrile fiber can be directly used for weaving textile fabrics.

The polyacrylonitrile fiber of the embodiment has proper breaking strength and fineness, and when the polyacrylonitrile fiber is the acrylic fiber filament prepared by the preparation process in the embodiment one, the polyacrylonitrile fiber can be directly knitted or woven for producing textile fabrics, and the produced fiber does not need to be firstly subjected to a spinning process and then is used for weaving, so that the production process flow of the textile fabrics can be simplified when the polyacrylonitrile fiber is applied to the textile field.

The embodiments in the above embodiments can be further combined or replaced, and the embodiments are only described in the preferred embodiments of the present invention, which is not limited to the concept and scope of the present invention, and without departing from the design concept of the present invention, various changes and improvements made by the technical solutions of the present invention by those skilled in the art all belong to the protection scope of the present invention.

Claims (10)

1. A spinning apparatus, characterized by: including the pair roller of constituteing by the first spinning roller of diameter difference and second spinning roller, the strand silk is twined to the other end from the one end of pair roller through first spinning roller and second spinning roller in turn, second spinning roller includes the washing section, realizes the washing to the strand silk through the water spray mechanism to the washing section water spray.

2. Spinning apparatus according to claim 1, characterised in that:

the water washing section is made of non-heat-conducting corrosion-resistant materials, the water spraying mechanism comprises a plurality of water washing nozzles, and the water washing nozzles can spray water flow to the water washing section;

along the length direction of second spinning roller the interval is provided with a plurality of water-proof platforms in the circumference of washing section, forms one washing region between two water-proof platforms, the washing section forms multichannel washing region, and every washing region corresponds and is equipped with a washing nozzle.

3. Spinning apparatus according to claim 2, characterised in that:

a recovery cover matched with the shape of the outer peripheral wall of the washing section is arranged below the washing section of the second spinning roller, partition plates are arranged on the inner wall of the recovery cover corresponding to the water-separating table, a manifold is formed between every two adjacent partition plates, and washing circulation tanks communicated with the manifolds in a one-to-one correspondence mode are arranged below the recovery cover;

and a suction pump is arranged between every two adjacent washing circulating tanks, the washing water recovered from the washing circulating tank corresponding to the next washing area is sucked into the washing circulating tank corresponding to the previous washing area by the suction pump along the traveling direction of the strand silk, and the washing circulating tanks are correspondingly connected with the washing nozzles one by one.

4. Spinning apparatus according to claim 1, characterised in that:

the second spinning roller also comprises a drying section made of materials different from the material of the washing section, the washing section is arranged in the front section area of the second spinning roller along the traveling path direction of the strand silk, the drying section is arranged in the rear section area of the second spinning roller, and the strand silk sequentially finishes washing and drying of the strand silk when passing through the washing section and the drying section;

the tail end of the drying section is in diameter reducing arrangement, and the strand silk can be retracted and shaped when passing through the diameter reducing part of the drying section.

5. Spinning apparatus according to claim 4, characterised in that:

the second spinning roller is still including being located the section of oiling between washing section and the stoving section, the washing section, the section of oiling, the stoving section that the strand silk passes through the second spinning roller in proper order accomplish the washing of strand silk, starching oil and stoving.

6. Spinning apparatus according to any one of claims 1 to 5, characterised in that:

the diameter of the first spinning roller is d₁At a rotational speed of n₁The diameter of the second spinning roller is d₂At a rotational speed of n₂Wherein d is₂＞d₁，n₁/n₂＝d₂/d₁。

7. The polyacrylonitrile fiber spinning machine comprises a frame and is characterized in that: the spinning device as claimed in any one of claims 1 to 6 is arranged on the frame, and further comprises a forming device, wherein the forming device comprises a coagulating bath and a primary washing tank, and filaments formed by the coagulating bath and the primary washing tank are wound on the pair of rollers;

a drawing roller is arranged between the coagulating bath tank and the primary water washing tank, the diameter of the drawing roller is d, the rotating speed is n, and the diameter of the first spinning roller is d₁At a rotational speed of n₁Wherein: n/n₁＜d₁/d。

8. The polyacrylonitrile fiber spinning machine according to the claim 7, characterized in that:

the drafting roller comprises an upper drafting roller and a lower drafting roller which are arranged between a coagulating bath and a primary washing tank from top to bottom, and the strand silk coagulated and formed in the coagulating bath is wound and drafted between the upper drafting roller and the lower drafting roller under the guide of the yarn guide, enters the primary washing tank, and is wound onto the pair rollers under the guide of the yarn guide after the secondary forming of the secondary bath solution in the primary washing tank.

9. The polyacrylonitrile fiber spinning machine according to the claim 8, characterized in that:

the forming device is positioned between the spinning device and the spinning device;

the spinning device comprises a plurality of spinning nozzles, each spinning nozzle comprises a spinning plate, a plurality of spinning holes are formed in each spinning plate, each spinning nozzle is located in the corresponding coagulating bath, and spinning stock solution sprayed out of each spinning nozzle sequentially passes through the coagulating baths for coagulating and forming and then enters the primary washing bath for secondary forming;

every M spinning nozzles correspond to a first spinning roller, wherein M is more than or equal to 1.

10. A polyacrylonitrile fibre spinning machine according to any one of claims 7 to 9, characterized in that:

the polyacrylonitrile fiber spinning machine is an acrylic fiber filament spinning machine or a carbon fiber precursor spinning machine.

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