Wet spinning drying device

Abstract

The present invention relates to the technical field of wet spinning drying devices, and in particular to a wet spinning drying device; by setting a spiral air guide groove, the air volume is the largest near the discharge port end, and therefore, it is designed to be a structure with a larger pitch. After the subsequent multi-stage diversion through the air guide plate, the air volume gradually decreases. Accordingly, the present invention designs a structure in which the pitch of the spiral air guide groove gradually decreases, so that the spiral air guide groove near the feed port end is distributed more densely, thereby compensating for the problem of low hot air volume caused by low air volume. Through the above structure, the hot air can be evenly distributed in the drying cylinder and evenly guided into the cavity, so that the silk thread passing through the cavity is dried uniformly and efficiently in all directions. By setting a smaller inner diameter of the drying cylinder, the hot air can be closer to the silk thread and fully utilized by the silk thread, thereby avoiding waste of heat energy; and it can avoid direct blowing of the hot air on the silk thread, thereby avoiding local overheating of the silk thread and affecting the quality of the silk thread.

Description

Technical Field

[0001] The present invention relates to the technical field of wet spinning drying devices, in particular to a wet spinning drying device. Background Art

[0002] In the wet spinning production process, the spinneret needs to be placed in the coagulation bath box, and the spinning solution is guided to the spinneret through a pipe. After the spinneret spins, the solution is coagulated in the coagulation bath and then dried by air drying or drying.

[0003] Natural drying is less efficient and requires multiple levels of godet rollers to guide the yarn through the air to ensure it is fully exposed to the air for drying. The yarn is then collected by winding rollers. This method requires a lot of space and has low drying efficiency.

[0004] A Chinese patent with authorization announcement number CN211823669U discloses a drying device for wet spinning, including a drying box, a heater, a blowing port fixing frame, a blowing port, a drying lamp, an inclined drying lamp and a wire guide roller. The device guides the silk thread into a relatively closed drying box and dries the silk thread through the heater and the drying lamp. In this method, since the drying lamp can only irradiate the silk thread in one direction and the heater also blows in one direction to the silk thread, there is a problem of uneven drying. In order to avoid local excessive heating of the silk thread, the distance between the drying lamp and the heater air outlet and the silk thread is relatively far, so the drying efficiency is low. A larger box needs to be set up, and multi-stage wire guide rollers need to be set inside the box to guide the silk thread to achieve complete drying.

[0005] Therefore, there is an urgent need to improve the wet spinning drying device to improve the drying uniformity and drying efficiency of wet spinning. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that it is urgent to improve the wet spinning drying device and enhance the drying uniformity and drying efficiency of the wet spinning.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A wet spinning drying device comprises a drying cylinder, a heater and an air guide plate, wherein a cylindrical cavity is provided in the drying cylinder and a spiral air guide groove is provided on the inner wall of the drying cylinder, wherein the pitch of the spiral air guide groove gradually increases from the feed inlet end to the discharge outlet end;

[0009] The air outlet of the heater faces the outlet end of the spiral air guide groove;

[0010] A plurality of the air guide plates are arranged in a circular array on the inner wall of the drying cylinder. The air guide plates extend into the spiral air guide groove, and a gap exists between the air guide plates and the bottom of the spiral air guide groove.

[0011] Furthermore, in the above-mentioned wet spinning drying device structure, the air guide plate is parallel to the axis of the drying cylinder.

[0012] Furthermore, in the above-mentioned wet spinning drying device structure, the angle between the air guide plate and the normal of the drying cylinder where it is located is 20-40 degrees, and the inner end of the air guide plate is inclined toward the air guiding direction of the spiral air guide groove.

[0013] Furthermore, in the above-mentioned wet spinning drying device structure, the depth of the air guide plate extending into the spiral air guide groove is one third of the total depth of the spiral air guide groove.

[0014] Furthermore, in the above-mentioned wet spinning drying device structure, the drying device also includes a first guide wire roller located outside the feed end of the drying cylinder and a second guide wire roller located outside the discharge end of the drying cylinder, so that the silk thread passes through the drying cylinder coaxially under the guidance of the first guide wire roller and the second guide wire roller.

[0015] Furthermore, in the above-mentioned wet spinning drying device structure, the outer wall of the drying cylinder is provided with a heat insulation layer.

[0016] Furthermore, in the above-mentioned wet spinning drying device structure, the drying cylinder has a plurality of connection holes distributed in a circular array, and electric heating wires are passed through the connection holes.

[0017] The beneficial effects of the present invention are as follows: in the structure of the wet spinning drying device involved in the present invention, the air volume is the largest near the discharge port end by setting the spiral air guide groove. Therefore, it is designed as a structure with a larger pitch. After the subsequent multi-stage diversion through the air guide plate, the air volume gradually decreases. Accordingly, the present invention designs a structure in which the pitch of the spiral air guide groove gradually decreases, so that the spiral air guide groove near the feed port end is distributed more tightly, thereby compensating for the problem of low hot air volume caused by low air volume. Through the above structure, the hot air can be evenly distributed in the drying cylinder and evenly guided into the cavity, and the silk thread passing through the cavity can be dried uniformly and efficiently in all directions. By setting a smaller inner diameter of the drying cylinder, the hot air can be closer to the silk thread and fully utilized by the silk thread, thereby avoiding waste of heat energy; and it can avoid direct blowing of hot air on the silk thread, thereby avoiding local overheating of the silk thread and affecting the quality of the silk thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the partial structure of a wet spinning drying device according to Example 1 of the present invention;

[0019] Figure 2 for Figure 1 A magnified view of part A;

[0020] Figure 3 This is a view of the discharge port end of a drying cylinder of a wet spinning drying device according to Example 1 of the present invention;

[0021] Figure 4 for Figure 3 B-direction cross-sectional view;

[0022] Figure 5 This is a view of the discharge port end of a drying cylinder of a wet spinning drying device according to Example 1 of the present invention;

[0023] Figure 6 This is a schematic structural diagram of a wet spinning device according to Example 2 of the present invention;

[0024] Description of labels:

[0025] 1. Drying cylinder; 11. Cavity; 12. Spiral air guide groove; 13. Heat insulation layer; 14. Heating wire;

[0026] 2. Wind deflector;

[0027] 3. The first godet roller;

[0028] 4. Second godet roller;

[0029] 5. Silk thread;

[0030] 6. Coagulation bath;

[0031] 7. Spinneret. DETAILED DESCRIPTION

[0032] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0033] Example 1

[0034] Please refer to Figure 1 system Figure 5 A wet spinning drying device comprises a drying cylinder 1, a heater and an air guide plate 2. A cylindrical cavity 11 is provided in the drying cylinder 1. A spiral air guide groove 12 is provided on the inner wall of the drying cylinder 1. The pitch of the spiral air guide groove 12 gradually increases from the feed inlet end to the discharge outlet end.

[0035] The air outlet of the heater faces the outlet end of the spiral air guide groove 12;

[0036] The plurality of air guide plates 2 are arranged in a circular array on the inner wall of the drying cylinder 1 . The air guide plates 2 extend into the spiral air guide groove 12 , and a gap exists between the air guide plates 2 and the bottom of the spiral air guide groove 12 .

[0037] In this embodiment, the silk thread 5 to be dried is guided to the cavity 11 passing through the drying cylinder 1 in the axial direction of the drying cylinder 1, and the hot air generated by the heater is blown in from the discharge port end of the spiral air guide groove 12, and flows in a spiral manner along the spiral air guide groove 12. When passing through the air guide plate 2, part of the hot air is guided into the cavity 11 by the air guide plate 2, and part of the hot air continues to flow in a spiral manner toward the feed port end from the gap between the air guide plate 2 and the air guide groove. When passing through the air guide plate 2, part of the hot air is guided into the cavity 11 by the air guide plate 2 again. In the present invention, since the air volume near the discharge port end in the spiral air guide groove 12 is the largest, it is designed as a structure with a larger pitch, and subsequently passes through the multi-stage air guide plate 2. After the diversion, the air volume gradually decreases. Accordingly, the present invention designs a structure in which the pitch of the spiral air guide groove 12 gradually decreases, so that the spiral air guide groove 12 near the feed port end is distributed more tightly, thereby compensating for the problem of low hot air volume caused by low air volume. Through the above structure, the hot air can be evenly distributed in the drying cylinder 1 and evenly guided into the cavity 11, so that the silk thread 5 passing through the cavity 11 is dried uniformly and efficiently in all directions. By setting a smaller inner diameter of the drying cylinder 1, the hot air can be closer to the silk thread 5 and be fully utilized by the silk thread 5 to avoid waste of heat energy; and it can prevent the hot air from blowing directly on the silk thread 5, and prevent local overheating of the silk thread 5 and affecting the quality of the silk thread 5.

[0038] In this embodiment, the air guide plate 2 is parallel to the axis of the drying cylinder 1 .

[0039] In this embodiment, the angle between the air guide plate 2 and the normal of the drying drum 1 where it is located is 20-40 degrees, and the inner end of the air guide plate 2 is inclined toward the air guiding direction of the spiral air guide groove 12 .

[0040] In this embodiment, refer to Figure 5 The angle between the guide plate 2 and the normal of the drying drum 1 is α. This inclination angle prevents the hot air from blowing directly onto the middle silk thread 5 under the guidance of the guide plate 2, but guides it to the next guide plate 2, thereby forming a circulating wind around the outer periphery of the silk thread 5, thereby improving the uniformity of the heating of the silk thread 5. For specific wind direction, please refer to Figure 5 Arrow in the .

[0041] In this embodiment, the depth of the air guide plate 2 extending into the spiral air guide groove 12 is one third of the total depth of the spiral air guide groove 12 .

[0042] In this embodiment, it is possible to further ensure that the hot air is evenly dispersed in the drying cylinder 1, thereby improving the drying uniformity and efficiency of the silk thread 5.

[0043] Reference Figure 6In this embodiment, the drying device also includes a first wire guide roller 3 located outside the feed end of the drying cylinder 1 and a second wire guide roller 4 located outside the discharge end of the drying cylinder 1, so that the wire 5 passes through the drying cylinder 1 coaxially under the guidance of the first wire guide roller 3 and the second wire guide roller 4.

[0044] In this embodiment, the outer wall of the drying drum 1 is provided with a heat-insulating layer 13. The heat-insulating layer 13 can be made of a layer of heat-insulating paint or other heat-insulating materials, such as thermal insulation cotton, applied to the surface of the drying drum 1. This locks heat within the drying drum, saving energy and improving drying efficiency.

[0045] In this embodiment, the drying cylinder 1 has a plurality of connection holes distributed in a circular array, and a heating wire 14 is passed through the connection holes.

[0046] In the above embodiment, referring to Figure 5 By providing a connection hole and passing the electric heating wire 14, the drying cylinder 1 can be auxiliary heated to further improve the drying efficiency.

[0047] Example 2

[0048] Please refer to Figures 1 to 6 , a wet spinning device, comprising the wet spinning drying device described in Example 1, referring to Figure 6 The spinning process comprises a coagulation bath 6, a spinneret 7, and a guide roller. The spinneret 7 is placed in the coagulation bath 6, and the thin stream of spinning solution extruded from the spinneret 7 is coagulated or coagulated and chemically reacted to form a fiber solution. For example, when wet spinning polyacrylonitrile fiber using sodium thiocyanate as a solvent, a dilute sodium thiocyanate solution can be used as the coagulation bath; for viscose fiber, an aqueous solution of sulfuric acid and sodium sulfate is used as the coagulation bath. The sodium sulfate acts as a coagulation agent, and the sulfuric acid acts as a chemical reaction to coagulate the yarn 5. The yarn 5 is then guided out of the coagulation bath 6 by the guide roller, and then guided by the first godet roller 3 to the drying drum 1 for drying. After that, it is guided by the second godet roller 4 and subsequent guide rollers to the take-up roller for collection.

[0049] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wet spinning drying device, characterized in that: It includes a drying cylinder, a heater and an air guide plate. The drying cylinder is provided with a cylindrical cavity. The inner wall of the drying cylinder is provided with a spiral air guide groove. The pitch of the spiral air guide groove gradually increases from the feed end to the discharge end. The air outlet of the heater faces the outlet end of the spiral air guide groove; A plurality of the air guide plates are arranged in a circumferential array on the inner wall of the drying cylinder, and the air guide plates extend into the spiral air guide groove, and a gap is formed between the air guide plates and the bottom of the spiral air guide groove; The air guide plate is parallel to the axis of the drying cylinder; the inner end of the air guide plate is inclined toward the air guiding direction of the spiral air guide groove; The silk thread to be dried is guided to the cavity of the drying cylinder through the axial direction of the drying cylinder. The hot air generated by the heater is blown in from the discharge end of the spiral air guide groove and flows in a spiral flow along the spiral air guide groove. When passing through the air guide plate, part of the hot air is guided into the cavity by the air guide plate, and part of the hot air continues to flow in a spiral flow toward the feed end from the gap between the air guide plate and the air guide groove. When passing through the air guide plate, part of the hot air is guided into the cavity again by the air guide plate.

2. The wet spinning drying device according to claim 1, characterized in that The angle between the air guide plate and the normal direction of the drying cylinder where it is located is 20-40 degrees.

3. The wet spinning drying device according to claim 1, characterized in that: The depth of the air guide plate extending into the spiral air guide groove is one third of the total depth of the spiral air guide groove.

4. The wet spinning drying device according to claim 1, characterized in that The drying device also includes a first wire guide roller located outside the feed end of the drying cylinder and a second wire guide roller located outside the discharge end of the drying cylinder, so that the silk thread passes through the drying cylinder coaxially under the guidance of the first wire guide roller and the second wire guide roller.

5. The wet spinning drying device according to claim 1, characterized in that: The outer wall of the drying cylinder is provided with a heat insulation layer.

6. The wet spinning drying device according to claim 1, characterized in that: The drying cylinder is provided with a plurality of connection holes distributed in a circumferential array, and electric heating wires are passed through the connection holes.

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