Spinning device for para-aramid fiber dry-jet wet spinning

Abstract

A spinning device for para-aramid fiber dry-jet wet spinning comprises a spinning nozzle, a coagulating bath component, an accelerating component and an air cooling component, the air cooling component comprises an upper sleeve and a lower sleeve which are nested with each other, a plurality of V-shaped faces which are evenly distributed in the circumferential direction are formed on the wall of the upper sleeve and the wall of the lower sleeve, and the upper sleeve is sleeved with the lower sleeve. A plurality of heat dissipation holes which are arranged in an array and used for heat dissipation are formed in the V-shaped faces, a drainage pipe used for drainage is arranged on the outer side of the top end of the upper sleeve, and the heat dissipation holes are formed in the direction perpendicular to the V-shaped faces; under the action of an external air feeder, the drainage pipe blows out air flow surrounding the outer sides of the upper sleeve and the lower sleeve by a circle, due to the fact that the flow speed of air on the outer sides of the upper sleeve and the lower sleeve is high, under the action of pressure difference, internal hot air flow is led out along the heat dissipation holes, the heat dissipation effect is improved, and the requirement for high-speed spinning is met.

Description

Technical Field

[0001] The utility model relates to the technical field of aramid production, in particular to a spinning device for dry-jet wet spinning of para-aramid. Background Art

[0002] Para-aramid fiber has extremely high strength and modulus, and also has excellent high temperature resistance and corrosion resistance. It is widely used in the production of high-performance ropes and cables. Para-aramid resin is mostly spun by dry-wet spinning. The spinning slurry is sprayed out using the spinneret of the spinning device, and then enters the air layer for stretching to form primary fibers, and then enters the coagulation bath for further spinning. Under the action of the coagulation bath, the liquid crystal structure of the primary fiber is oriented and fixed, and finally becomes a fiber with excellent performance.

[0003] At present, the air layer stretching part of the spinning device is set to be height-adjustable, so as to adjust the contact time between the filament bundle and the air and improve the heat dissipation effect. However, the performance improvement is limited if the heat dissipation effect is improved by simply increasing the air layer height, and it is often unable to meet the heat dissipation requirements during high-speed spinning. The heat inside the air layer cannot be discharged in time, causing heat accumulation, which affects the performance of the filament bundle after forming. Utility Model Content

[0004] In view of the technical problems existing in the air layer in the prior art, the first aspect of the utility model provides a spinning device for dry-jet wet spinning of para-aramid, comprising:

[0005] Spinneret, used for spinning slurry;

[0006] A coagulation bath component, arranged below the spinning end of the spinneret, for coagulating the filament bundle;

[0007] An accelerating component, arranged at the output end of the coagulation bath component, for increasing the flow rate of the coagulation bath;

[0008] An air cooling component is arranged between the spinning end of the spinneret and the input end of the coagulation bath component, and an air layer is formed inside for stretching the filament bundle;

[0009] The air cooling component comprises an upper sleeve and a lower sleeve which are nested with each other, and the upper sleeve and the lower sleeve are arranged to have a gear-shaped cross-section, so that the tube walls of the upper sleeve and the lower sleeve form a plurality of V-shaped surfaces which are evenly arranged in the circumferential direction, and the V-shaped surfaces are provided with a plurality of heat dissipation holes which are arranged in an array and are used for heat dissipation;

[0010] A drainage pipe for drainage is provided on the outer side of the top end of the upper sleeve, and the heat dissipation hole is opened in a direction perpendicular to the V-shaped surface;

[0011] The upper sleeve and the lower sleeve are arranged to be relatively slidable along an axis, so that the height of the air layer can be adjusted.

[0012] Preferably, the included angle of the V-shaped surface is 80-90°.

[0013] Preferably, the bottom end cover of the lower casing is provided with a conical air guide cover for exhausting air.

[0014] Preferably, the drainage tube is configured to be in a circular ring shape, and a plurality of evenly arranged air holes are provided around the drainage tube, and the air holes are all facing downward.

[0015] Preferably, the inner ring diameter of the drainage tube is larger than the circumscribed circle diameter of the lower casing.

[0016] Preferably, the coagulation bath component comprises a spinning tube, an overflow tray and a first water tank, the overflow tray is installed in the first water tank, the first end of the spinning tube is connected to the bottom of the overflow tray, and the second end of the overflow tray passes through and extends to the bottom of the first water tank;

[0017] The side wall of the overflow plate is provided with a plurality of evenly arranged overflow holes, and the bottom surface of the first water tank is provided with a first water inlet pipe.

[0018] Preferably, a circular cover plate is fixed on the top of the overflow tray.

[0019] Preferably, the inner diameter of the annular cover plate is smaller than the diameter of the inscribed circle of the lower casing.

[0020] Preferably, the acceleration component includes a second water tank, a second water inlet pipe and an acceleration tube, the second water inlet pipe is arranged on the bottom surface of the second water tank, the second water tank and the acceleration tube are both arranged on the outside of the second end of the spinning tube, and a water flow channel is provided between the acceleration tube and the spinning tube.

[0021] Preferably, the accelerating tube is configured to be conical.

[0022] Compared with the prior art, the advantages of the utility model are:

[0023] 1. By setting the upper and lower sleeves constituting the air layer to gear-shaped cross-sections, the tube walls of the upper and lower sleeves form a plurality of V-shaped surfaces evenly arranged in the circumferential direction, and the V-shaped surfaces with heat dissipation holes form a V-shaped heat dissipation surface for airflow exchange. Compared with the tube wall in the shape of an arc surface, the heat dissipation area of ​​the V-shaped tube wall is larger, which can effectively improve the heat dissipation effect;

[0024] 2. A drainage pipe is arranged on the outer side of the top of the upper sleeve. Under the action of the external blower, the drainage pipe blows out an airflow around the outer side of the upper sleeve and the lower sleeve, and the airflow flows along the height direction of the upper sleeve and the lower sleeve. Since the gas flow rate on the outer side of the upper sleeve and the lower sleeve is relatively high, under the action of the pressure difference, the hot air flow inside the upper sleeve and the lower sleeve is led outward along the heat dissipation holes, thereby improving the heat dissipation effect to meet the needs of high-speed spinning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a spinning device for dry-jet wet spinning of para-aramid fiber shown in the utility model;

[0026] Figure 2 It is a structural schematic diagram of an upper sleeve and a lower sleeve in a spinning device for dry-jet wet spinning of para-aramid fiber shown in the utility model;

[0027] Figure 3 It is a structural schematic diagram of a drainage tube in a spinning device for dry-jet wet spinning of para-aramid fiber shown in the utility model;

[0028] Figure 4 It is a schematic diagram of the flow direction of airflow exchange in a spinning device for dry-jet wet spinning of para-aramid fiber shown in the utility model.

[0029] In the figure, 1, spinneret; 2, coagulation bath component; 21, spinning tube; 22, overflow plate; 221, overflow hole; 23, first water tank; 231, first water inlet pipe; 24, circular cover; 3, acceleration component; 31, second water tank; 32, second water inlet pipe; 33, acceleration tube; 301, water flow channel; 4, air cooling component; 41, upper sleeve; 42, lower sleeve; 43, conical guide cover; 401, V-shaped surface; 402, heat dissipation hole; 5, drainage pipe; 501, air hole. DETAILED DESCRIPTION

[0030] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0031] Example

[0032] Combination Figure 1-Figure 4 As shown, the utility model provides a spinning device for dry-jet wet spinning of para-aramid, which mainly comprises a spinneret 1, a coagulation bath component 2, an acceleration component 3 and an air cooling component 4.

[0033] The spinneret 1 is installed on a fiber spinning machine, the coagulation bath component 2 is arranged below the spinning end of the spinneret 1, the acceleration component 3 is arranged at the output end of the coagulation bath component 2, and the air cooling component 4 is arranged between the spinning end of the spinneret 1 and the input end of the coagulation bath component 2, forming an air layer inside.

[0034] In this way, the spinneret 1 spins silk and passes through the air layer formed inside the air cooling component 4. The filament bundle ejected from the spinneret 1 is stretched by the air layer to form a primary fiber with a certain strength. The filament bundle then enters the coagulation bath component 2, and is cooled by cooling water to become a fiber. The secondary water supply is accelerated by the component 3, and the water supply flow rate is increased, thereby increasing the water flow rate inside the coagulation bath component 2 to meet the needs of high-speed spinning.

[0035] At present, the air layer stretching part of the spinning device is set to be height-adjustable, so as to adjust the contact time between the filament bundle and the air and improve the heat dissipation effect. However, the performance improvement is limited if the heat dissipation effect is improved by simply increasing the air layer height, and it is often unable to meet the heat dissipation requirements during high-speed spinning. The heat inside the air layer cannot be discharged in time, causing heat accumulation, which affects the performance of the filament bundle after forming.

[0036] Combination Figure 1 , Figure 2 and Figure 4 As shown, the air cooling component 4 includes an upper sleeve 41 and a lower sleeve 42 which are nested with each other.

[0037] Specifically, the upper sleeve 41 is connected to the spinning end of the spinneret 1, the lower sleeve 42 is connected to the input end of the coagulation bath component 2, and the upper sleeve 41 is nested in the lower sleeve 42, and an air layer is formed inside the upper sleeve 41 and the lower sleeve 42. The upper sleeve 41 and the lower sleeve 42 are configured to be relatively slidable along the axis so that the height of the air layer can be adjusted. By increasing the height of the air layer, the heat dissipation effect of the air layer is improved.

[0038] Combination Figure 2 and Figure 4 As shown, the upper sleeve 41 and the lower sleeve 42 are configured to have a gear-shaped cross-section, so that the tube walls of the upper sleeve 41 and the lower sleeve 42 form a plurality of V-shaped surfaces 401 that are evenly arranged in the circumferential direction, and the V-shaped surfaces 401 are each provided with a plurality of heat dissipation holes 402 that are arranged in an array and used for heat dissipation. The V-shaped surfaces 401 provided with the heat dissipation holes 402 form a V-shaped heat dissipation surface for airflow exchange. Compared with a tube wall in the shape of an arc surface, the tube wall in the V-shaped surface has a larger heat dissipation area, which can effectively improve the heat dissipation effect.

[0039] Furthermore, the heat dissipation holes 402 are opened in a direction perpendicular to the V-shaped surface 401, and a drainage pipe 5 for drainage is provided on the outer side of the top end of the upper sleeve 41, and the drainage pipe 5 is connected to an external blower. During the drainage process, the airflow flows and exchanges along the heat dissipation holes 402. Since the heat dissipation holes 402 are opened in a direction perpendicular to the V-shaped surface 401, the flow direction of the airflow is not toward the center of the upper sleeve 41 and the lower sleeve 42, thereby avoiding the influence of the lateral airflow on the filament bundle.

[0040] In this way, the filament bundle ejected from the spinneret 1 passes through the interior of the upper sleeve 41 and the lower sleeve 42, and the air layer is used to stretch the filament bundle and dissipate the heat to form a primary fiber with a certain strength. Under the action of the external blower, the guide tube 5 blows out an airflow around the outer side of the upper sleeve 41 and the lower sleeve 42, and the airflow flows in the height direction of the upper sleeve 41 and the lower sleeve 42. Since the gas flow rate outside the upper sleeve 41 and the lower sleeve 42 is relatively high, under the action of the pressure difference, the hot air flow inside the upper sleeve 41 and the lower sleeve 42 is led outward along the heat dissipation hole 402, thereby improving the heat dissipation effect to meet the needs of high-speed spinning.

[0041] In a preferred embodiment, the angle of the V-shaped surface 401 is 80-90°. If the angle is too large, the airflow will flow toward the center of the upper sleeve 41 and the lower sleeve 42, while if the angle is too small, the space for airflow will be smaller, thereby blocking the heat dissipation channel.

[0042] In an optional embodiment, the bottom cover of the lower sleeve 42 is provided with a conical air guide cover 43 for exhausting air, and the shortened end of the conical air guide cover 43 is oriented toward the incoming air direction, and the enlarged end is oriented toward the exhaust direction, so that the airflow blown by the drainage pipe 5 is guided by the conical air guide cover 43 when it reaches the bottom end of the lower sleeve 42, and is dispersed to the surroundings to prevent high-speed airflow from entering the interior of the lower sleeve 42.

[0043] Combination Figure 1 and Figure 4 As shown, the drainage tube 5 is set in a circular shape and is sleeved on a circle of the upper sleeve 41, and a plurality of evenly arranged air holes 501 are provided on a circle of the drainage tube 5, and the air holes 501 are all facing downward, and air flows are blown downward through the air holes 501, so that a downward-flowing air flow is formed on the outer sides of the upper sleeve 41 and the lower sleeve 42.

[0044] Furthermore, the inner ring diameter of the drainage tube 5 is larger than the circumscribed circle diameter of the lower sleeve 42 , so as to avoid interference between the drainage tube 5 and the lower sleeve 42 when the upper sleeve 41 and the lower sleeve 42 slide relative to each other.

[0045] Combination Figure 1 As shown, the coagulation bath component 2 includes a spinning tube 21, an overflow tray 22 and a first water tank 23. The overflow tray 22 is installed in the first water tank 23. The first end of the spinning tube 21 is connected to the bottom of the overflow tray 22. The second end of the overflow tray 22 passes through and extends to the bottom of the first water tank 23. The side wall of the overflow tray 22 is provided with a plurality of evenly arranged overflow holes 221. The bottom surface of the first water tank 23 is provided with a first water inlet pipe 231.

[0046] The filament bundle is introduced into the spinning tube 21 through the air layer and moves downward along the spinning tube 21. The first water inlet pipe 231 is connected to an external water source, and water is replenished into the first water tank 23 through the first water inlet pipe 231. The water in the first water tank 23 enters the overflow plate 22 through the overflow hole 221, and then converges into the spinning tube 21 and flows downward to cool the filament bundle in the spinning tube 21.

[0047] Furthermore, a circular cover plate 24 is fixed to the top of the overflow tray 22, and the lower sleeve 42 is connected to the circular cover plate 24. The inner diameter of the circular cover plate 24 is smaller than the inscribed circle diameter of the lower sleeve 42, so as to shield the top opening of the overflow tray 22 and prevent the airflow from entering the overflow tray 22 and affecting the filament bundle.

[0048] Combination Figure 1 As shown, the acceleration component 3 includes a second water tank 31, a second water inlet pipe 32 and an acceleration tube 33. The second water inlet pipe 32 is arranged on the bottom surface of the second water tank 31. The second water tank 31 and the acceleration tube 33 are both sleeved on the outside of the second end of the spinning tube 21, and the top of the second water tank 31 is sealed and connected to the spinning tube 21. A water flow channel 301 is provided between the acceleration tube 33 and the spinning tube 21.

[0049] The second water inlet pipe 32 is connected to an external water source, and water is replenished into the second water tank 31 through the second water inlet pipe 32. The water in the second water tank 31 enters the acceleration tube 33 through the water flow channel 301 and merges into the water flow output by the spinning tube 21. By controlling the water replenishment pressure of the second water tank 31, the flow rate of the water in the water flow channel 301 is adjusted, thereby increasing the water flow rate output by the spinning tube 21 to meet the needs of high-speed spinning.

[0050] Furthermore, the accelerating tube 33 is configured to be conical, so that the water in the water flow channel 301 can be better merged into the water flow output by the spinning tube 21 .

[0051] In combination with the above embodiments, by setting the upper sleeve 41 and the lower sleeve 42 constituting the air layer to have a gear-shaped cross section, the tube walls of the upper sleeve 41 and the lower sleeve 42 form a plurality of V-shaped surfaces 401 evenly arranged in the circumferential direction, and the V-shaped surfaces 401 with heat dissipation holes 402 form a V-shaped heat dissipation surface for airflow exchange. Compared with the tube wall in the shape of an arc surface, the heat dissipation area of ​​the tube wall of the V-shaped surface is larger, which can effectively improve the heat dissipation effect;

[0052] At the same time, a drainage pipe 5 is arranged on the outer side of the top end of the upper sleeve 41. Under the action of the external blower, the drainage pipe 5 blows out an airflow around the outer side of the upper sleeve 41 and the lower sleeve 42, and the airflow flows in the height direction of the upper sleeve 41 and the lower sleeve 42. Since the gas flow rate on the outer side of the upper sleeve 41 and the lower sleeve 42 is relatively high, under the action of the pressure difference, the hot air flow inside the upper sleeve 41 and the lower sleeve 42 is led outward along the heat dissipation holes 402, thereby improving the heat dissipation effect to meet the needs of high-speed spinning.

Claims

1. A spinning device for dry-jet wet spinning of para-aramid fiber, characterized in that: include: A spinneret (1) for spinning a spinning slurry; A coagulation bath component (2), arranged below the spinning end of the spinneret (1), and used for coagulating the filament bundle; An accelerating component (3) is arranged at the output end of the coagulation bath component (2) and is used to increase the flow rate of the coagulation bath; An air cooling component (4) is arranged between the spinning end of the spinneret (1) and the input end of the coagulation bath component (2), and forms an air layer for stretching the filament bundle inside; The air cooling component (4) comprises an upper sleeve (41) and a lower sleeve (42) which are nested with each other, and the upper sleeve (41) and the lower sleeve (42) are arranged to have a gear-shaped cross-section, so that the tube walls of the upper sleeve (41) and the lower sleeve (42) form a plurality of V-shaped surfaces (401) uniformly arranged in the circumferential direction, and the V-shaped surfaces (401) are each provided with a plurality of heat dissipation holes (402) arranged in an array and used for heat dissipation; A drainage pipe (5) for drainage is provided on the outer side of the top end of the upper sleeve (41), and the heat dissipation hole (402) is opened in a direction perpendicular to the V-shaped surface (401); The upper sleeve (41) and the lower sleeve (42) are arranged to slide relative to each other along an axis, so that the height of the air layer can be adjusted.

2. A spinning device for dry-jet wet spinning of para-aramid according to claim 1, characterized in that: The included angle of the V-shaped surface (401) is 80-90°.

3. The spinning device for dry-jet wet spinning of para-aramid fiber according to claim 1, characterized in that: The bottom end cover of the lower casing (42) is provided with a conical air guide cover (43) for exhausting air.

4. The spinning device for dry-jet wet spinning of para-aramid according to claim 1, characterized in that: The drainage tube (5) is arranged in a circular ring shape, and a plurality of evenly arranged air holes (501) are arranged around the drainage tube (5), and the air holes (501) are all facing downwards.

5. The spinning device for dry-jet wet spinning of para-aramid fiber according to claim 4, characterized in that: The inner ring diameter of the drainage tube (5) is larger than the circumscribed circle diameter of the lower casing (42).

6. The spinning device for dry-jet wet spinning of para-aramid fiber according to claim 1, characterized in that: The coagulation bath component (2) comprises a spinning tube (21), an overflow tray (22) and a first water tank (23), wherein the overflow tray (22) is installed in the first water tank (23), a first end of the spinning tube (21) is connected to the bottom of the overflow tray (22), and a second end of the overflow tray (22) penetrates and extends to the bottom of the first water tank (23); The side wall of the overflow tray (22) is provided with a plurality of evenly arranged overflow holes (221), and the bottom surface of the first water tank (23) is provided with a first water inlet pipe (231).

7. The spinning device for dry-jet wet spinning of para-aramid fiber according to claim 6, characterized in that: A circular cover plate (24) is fixed on the top of the overflow disk (22).

8. The spinning device for para-aramid dry-jet wet spinning according to claim 7, characterized in that: The inner diameter of the annular cover plate (24) is smaller than the diameter of the inscribed circle of the lower casing (42).

9. The spinning device for dry-jet wet spinning of para-aramid fiber according to claim 6, characterized in that: The accelerating component (3) comprises a second water tank (31), a second water inlet pipe (32) and an accelerating tube (33); the second water inlet pipe (32) is arranged on the bottom surface of the second water tank (31); the second water tank (31) and the accelerating tube (33) are both sleeved on the outer side of the second end of the spinning tube (21); and a water flow channel (301) is provided between the accelerating tube (33) and the spinning tube (21).

10. The spinning device for dry-jet wet spinning of para-aramid fiber according to claim 9, characterized in that: The accelerating tube (33) is configured to be conical.

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