Coagulating bath device for para-aramid fiber dry-jet wet spinning

Abstract

A coagulating bath device for para-aramid fiber dry-jet wet spinning comprises a spinning pipe, an overflow disc, an overflow box and an accelerating pipe, a water supply channel is formed between the accelerating pipe and the spinning pipe, a pressure stabilizing ring is arranged in the water supply channel and is in a funnel shape, and the overflow disc is arranged in the water supply channel. The amplifying end of the pressure stabilizing ring is connected to the inner wall of the accelerating tube and faces the water incoming direction, the narrowing end of the pressure stabilizing ring is attached to the outer wall of the second end of the spinning tube, and the narrowing end of the pressure stabilizing ring can be elastically contracted and contracted under the action of water pressure; the pressure stabilizing ring is arranged in the water supply channel formed by the accelerating tube and the spinning tube, when secondary water supply acceleration is carried out on the water supply channel, the narrowing end of the pressure stabilizing ring opens to drain water under the action of water pressure, and when the water pressure fluctuates, the narrowing end of the pressure stabilizing ring correspondingly contracts or opens to balance the fluctuating water pressure, so that the water supply speed is increased. And the flow speed of the water flow tends to be stable.

Description

Technical Field

[0001] The utility model relates to the technical field of aramid production, in particular to a coagulation bath device used 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 by 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 fibers is oriented and fixed, and finally becomes a fiber with excellent performance. The coagulation bath component is also provided with an accelerator, which increases the water flow rate of the coagulation bath through secondary water supply, which can meet the needs of high-speed spinning.

[0003] At present, there are two ways of secondary water supply for accelerators. One is to directly deliver high-speed water flow into the tube along the circumference of the tube. The other is to set a high-speed water flow surrounding the main water flow at the output end of the coagulation bath to increase the water flow rate of the coagulation bath, and adjust the flow rate by controlling the water pressure of the secondary water supply. The water flow rate of the above acceleration methods is greatly affected by the water pressure. If the water pressure of the secondary water supply is unstable, it will cause the main water flow of the coagulation bath to fluctuate laterally, causing the filament bundle to shift. Utility Model Content

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

[0005] A spinning tube, wherein an overflow plate is disposed at the first end of the spinning tube, and a side wall of the overflow plate is provided with a plurality of evenly distributed liquid inlet holes;

[0006] An overflow box, wherein the overflow plate is arranged in the overflow box, and the second end of the spinning tube passes through and extends to the bottom of the overflow box, and a first water inlet pipe is arranged on the overflow box;

[0007] An accelerating tube is sleeved on the outer side of the second end of the spinning tube, a water supply channel is formed between the accelerating tube and the spinning tube, and is used for secondary water supply acceleration of the coagulation bath, and a second water inlet pipe is provided on the accelerating tube;

[0008] Among them, a pressure stabilizing ring is provided in the water supply channel, and the pressure stabilizing ring is configured to be funnel-shaped. The enlarged end of the pressure stabilizing ring is connected to the inner wall of the accelerating tube and faces the incoming water direction, and the narrowed end is attached to the outer wall of the second end of the spinning tube, and the narrowed end of the pressure stabilizing ring is configured to be elastically scalable under the action of water pressure, so that the pressure stabilizing ring can balance the water pressure.

[0009] Preferably, a conical drainage surface is provided on the outer side of the second end of the spinning tube, and a drainage section corresponding to the conical drainage surface is provided at the bottom of the accelerating tube, so that a funnel-shaped drainage channel is formed at the bottom of the water supply channel.

[0010] Preferably, an internally threaded tube is provided at the top of the accelerating tube, and an external thread corresponding to the internally threaded tube is provided at the outer side of the spinning tube, and the threads of the internally threaded tube and the external thread cooperate so that the accelerating tube can move axially to adjust the width of the drainage channel.

[0011] Preferably, a sealing ring is provided on the inner wall of the top of the accelerating tube for sealing the gap between the top of the accelerating tube and the spinning tube.

[0012] Preferably, the voltage stabilizing ring is made of butyl rubber.

[0013] Preferably, a filament bundle ring is provided at the connection between the spinning tube and the overflow disk, and the filament bundle ring is configured as an arc-shaped annular protrusion for guiding the filament bundle into the spinning tube.

[0014] Preferably, a circular cover plate is connected to the top of the overflow disk, and the inner diameter of the circular cover plate is larger than the outer diameter of the wire binding ring.

[0015] Preferably, a pressure equalizing ring is provided inside the overflow box, and the pressure equalizing ring is located between the overflow plate and the first water inlet pipe.

[0016] Preferably, the first water inlet pipe is arranged on the bottom surface of the overflow box.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] 1. By arranging a pressure stabilizing ring in the water supply channel formed between the accelerating tube and the spinning tube, when the water supply channel performs secondary water supply acceleration, under the action of the water pressure corresponding to the set flow rate, the narrow end of the pressure stabilizing ring opens to a corresponding amplitude to discharge water. When the water pressure fluctuates, the narrow end of the pressure stabilizing ring contracts or opens accordingly, which balances the fluctuating water pressure, stabilizes the flow rate of the water flow, and improves the flow rate stability of the accelerated water flow;

[0019] 2. An internally threaded tube is provided at the top of the accelerating tube, and an externally threaded tube corresponding to the internally threaded tube is provided at the outer side of the spinning tube. The threads of the internally threaded tube and the externally threaded tube cooperate to enable the accelerating tube to move axially, thereby adjusting the width of the drainage channel. Under the same pressure, the narrower the width of the drainage channel, the greater the water flow rate, and the wider the width of the drainage channel, the smaller the water flow rate. Therefore, the water flow rate can also be controlled by adjusting the width of the drainage channel. Compared with controlling the flow rate by water pressure, the method of adjusting the width of the drainage channel by threads has a higher accuracy in controlling the water flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of a coagulation bath device for dry-jet wet spinning of para-aramid shown in the utility model;

[0022] Figure 2 It is a cross-sectional view of a coagulation bath device for dry-jet wet spinning of para-aramid shown in the utility model;

[0023] Figure 3 yes Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 The utility model is a schematic diagram of the structure of a voltage stabilizing ring in a coagulation bath device for dry-jet wet spinning of para-aramid.

[0025] In the figure, 1. spinning tube; 11. overflow plate; 101. liquid inlet hole; 12. circular cover plate; 13. conical drainage surface; 14. wire binding ring; 15. external thread; 2. overflow box; 21. first water inlet pipe; 22. pressure equalizing ring; 3. acceleration tube; 301. water supply channel; 302. drainage section; 303. drainage channel; 31. second water inlet pipe; 32. internal threaded pipe; 33. sealing ring; 4. pressure stabilizing ring. DETAILED DESCRIPTION

[0026] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0027] At present, there are two ways of secondary water supply for accelerators. One is to directly deliver high-speed water flow into the tube along the circumference of the tube. The other is to set a high-speed water flow surrounding the main water flow at the output end of the coagulation bath to increase the water flow rate of the coagulation bath, and adjust the flow rate by controlling the water pressure of the secondary water supply. The water flow rate of the above acceleration methods is greatly affected by the water pressure. If the water pressure of the secondary water supply is unstable, the main water flow of the coagulation bath will cause lateral fluctuations, causing the filament bundle to shift. Therefore, how to maintain the stability of the water flow rate during secondary acceleration is an urgent problem to be solved.

[0028] Combination Figure 1-Figure 4 As shown, the utility model provides a coagulation bath device for para-aramid dry-jet wet spinning, comprising a spinning tube 1, an overflow box 2 and an accelerating tube 3.

[0029] Among them, an overflow plate 11 is provided at the first end of the spinning tube 1, and the overflow plate 11 is arranged in the overflow box 2. The side wall of the overflow plate 11 is provided with a plurality of evenly distributed liquid inlet holes 101, and the second end of the spinning tube 1 passes through and extends to the bottom of the overflow box 2, and a first water inlet pipe 21 is provided on the overflow box 2.

[0030] In this way, the filament bundle is introduced into the spinning tube 1 through the overflow plate 11 and transported downward along the spinning tube 1. The external water source replenishes water to the overflow box 2 through the first water inlet pipe 21. The water in the overflow box 2 overflows to the overflow plate 11 through the liquid inlet hole 101 and flows into the spinning tube 1 to cool the filament bundle transported inside the spinning tube 1.

[0031] Combination Figure 2 As shown, a filament bundle ring 14 is provided at the connection between the spinning tube 1 and the overflow plate 11. The filament bundle ring 14 is configured as an arc-shaped annular protrusion. When the filament bundle enters the spinning tube 1, the filament bundle ring 14 guides and restrains the filament bundle.

[0032] Combination Figure 1 and Figure 2 As shown, a circular cover plate 12 is connected to the top of the overflow tray 11. The circular cover plate 12 can cover the top opening of the overflow tray 11, reduce the area in contact with the air, and avoid contamination of the inside of the overflow tray 11.

[0033] Furthermore, the inner diameter of the annular cover plate 12 is larger than the outer diameter of the wire binding ring 14, so that the wire bundle can pass through the center of the annular cover plate 12 to avoid interference with the wire bundle.

[0034] Combination Figure 2 As shown, a pressure equalizing ring 22 is provided inside the overflow box 2 , and the pressure equalizing ring 22 is located between the overflow plate 11 and the first water inlet pipe 21 .

[0035] In a specific embodiment, the pressure equalizing ring 22 is a circular ring with a plurality of evenly distributed through holes. When the first water inlet pipe 21 replenishes water into the overflow box 2, the pressure equalizing ring 22 disperses the water pressure so that the water flow passing through the pressure equalizing ring 22 is in a stable state, avoiding turbulence or backmixing.

[0036] Furthermore, the first water inlet pipe 21 is arranged on the bottom surface of the overflow box 2. When the first water inlet pipe 21 replenishes water into the overflow box 2, no lateral flow will occur in the overflow box 2, thereby improving the stability of the water flow inside the overflow box 2.

[0037] Combination Figure 1 and Figure 2 As shown, the accelerating tube 3 is sleeved on the outer side of the second end of the spinning tube 1 .

[0038] In a specific embodiment, a water supply channel 301 is formed between the accelerating tube 3 and the spinning tube 1. A second water inlet pipe 31 is provided on the accelerating tube 3. An external water source replenishes water into the accelerating tube 3 through the second water inlet pipe 31. The water in the accelerating tube 3 flows downward along the water supply channel 301 and merges with the water discharged from the second end of the spinning tube 1. By controlling the water supply pressure, the flow rate of the merged water flow is increased, thereby meeting the cooling requirements of high-speed spinning.

[0039] Combination Figure 2 and Figure 3 As shown, in order to maintain a stable water flow rate during acceleration, a pressure stabilizing ring 4 is provided in the water supply channel 301 .

[0040] In a specific embodiment, the voltage stabilizing ring 4 is configured to be funnel-shaped, the enlarged end of the voltage stabilizing ring 4 is connected to the inner wall of the accelerating tube 3 and faces the incoming water direction, the narrowed end is attached to the outer wall of the second end of the spinning tube 1, and the narrowed end of the voltage stabilizing ring 4 is configured to be elastically scalable under the action of water pressure.

[0041] In this way, when the water supply channel 301 is performing secondary water supply acceleration, under the action of the water pressure corresponding to the set flow rate, the narrowed end of the pressure stabilizing ring 4 opens to a corresponding amplitude to discharge water. When the water pressure fluctuates, the narrowed end of the pressure stabilizing ring 4 contracts or opens accordingly, balancing the fluctuating water pressure, making the water flow velocity tend to be stable, thereby improving the flow velocity stability of the accelerated water flow.

[0042] In an optional embodiment, the voltage stabilizing ring 4 is made of butyl rubber, which has good elasticity and can be elastically deformed under the action of water pressure. At the same time, it itself has good aging resistance and a long service life.

[0043] Furthermore, a conical drainage surface 13 is provided on the outer side of the second end of the spinning tube 1, and a drainage section 302 corresponding to the conical drainage surface 13 is provided on the bottom of the accelerating tube 3, so that a funnel-shaped drainage channel 303 is formed at the bottom of the water supply channel 301. When the water flows through the funnel-shaped drainage channel 303, it can flow obliquely toward the center of the pipeline and better merge with the water flow of the spinning tube 1.

[0044] Combination Figure 1 and Figure 2 As shown, an internal threaded tube 32 is provided at the top of the accelerating tube 3, and an external thread 15 corresponding to the internal threaded tube 32 is provided on the outer side of the spinning tube 1. Through the threaded cooperation between the internal threaded tube 32 and the external thread 15, the accelerating tube 3 can move axially, thereby adjusting the width of the drainage channel 303.

[0045] Furthermore, a sealing ring 33 is provided on the inner wall of the top of the accelerating tube 3 to seal the gap between the top of the accelerating tube 3 and the spinning tube 1 to prevent leakage from the sliding gap when the accelerating tube 3 is adjusted.

[0046] In this way, under the same pressure, the narrower the width of the drainage channel 303, the greater the water flow rate, and the wider the width of the drainage channel 303, the smaller the water flow rate. The water flow rate can also be controlled by adjusting the width of the drainage channel 303.

[0047] In combination with the above embodiments, by arranging a pressure stabilizing ring 4 inside the water supply channel 301 formed by the accelerating tube 3 and the spinning tube 1, when the water supply channel 301 performs secondary water supply acceleration, under the action of the water pressure corresponding to the set flow rate, the narrowed end of the pressure stabilizing ring 4 opens to a corresponding amplitude to discharge water, and when the water pressure fluctuates, the narrowed end of the pressure stabilizing ring 4 contracts or opens accordingly, balancing the fluctuating water pressure, so that the flow rate of the water flow tends to be stable, thereby improving the flow rate stability of the accelerated water flow;

[0048] An internal threaded tube 32 is provided at the top of the accelerating tube 3, and an external thread 15 corresponding to the internal threaded tube 32 is provided on the outer side of the spinning tube 1. The threads of the internal threaded tube 32 and the external thread 15 cooperate to enable the accelerating tube 3 to move axially, thereby adjusting the width of the drainage channel 303. Under the same pressure, the narrower the width of the drainage channel 303, the greater the water flow rate, and the wider the width of the drainage channel 303, the smaller the water flow rate. Therefore, the water flow rate can also be controlled by adjusting the width of the drainage channel 303.

Claims

1. A coagulation bath device for dry-jet wet spinning of para-aramid, characterized in that: include: A spinning tube (1), wherein an overflow plate (11) is disposed at a first end of the spinning tube (1), and a side wall of the overflow plate (11) is provided with a plurality of evenly distributed liquid inlet holes (101); An overflow box (2), wherein the overflow plate (11) is arranged in the overflow box (2), and the second end of the spinning tube (1) passes through and extends to the bottom of the overflow box (2), and the overflow box (2) is provided with a first water inlet pipe (21); an accelerating tube (3) sleeved on the outer side of the second end of the spinning tube (1), a water supply channel (301) being formed between the accelerating tube (3) and the spinning tube (1) for secondary water supply acceleration of the coagulation bath, and a second water inlet pipe (31) being provided on the accelerating tube (3); Wherein, a voltage stabilizing ring (4) is provided in the water supply channel (301), and the voltage stabilizing ring (4) is configured to be funnel-shaped, the enlarged end of the voltage stabilizing ring (4) is connected to the inner wall of the accelerating tube (3) and faces the incoming water direction, and the narrowed end is attached to the outer wall of the second end of the spinning tube (1), and the narrowed end of the voltage stabilizing ring (4) is configured to be elastically scalable under the action of water pressure, so that the voltage stabilizing ring (4) can balance the water pressure.

2. A coagulation bath device for para-aramid dry-jet wet spinning according to claim 1, characterized in that: A conical drainage surface (13) is provided on the outer side of the second end of the spinning tube (1), and a drainage section (302) corresponding to the conical drainage surface (13) is provided at the bottom of the accelerating tube (3), so that a funnel-shaped drainage channel (303) is formed at the bottom of the water supply channel (301).

3. A coagulation bath device for para-aramid dry-jet wet spinning according to claim 2, characterized in that: An internally threaded tube (32) is provided at the top of the accelerating tube (3), and an external thread (15) corresponding to the internally threaded tube (32) is provided at the outer side of the spinning tube (1). The threads of the internally threaded tube (32) and the external thread (15) cooperate so that the accelerating tube (3) can move in the axial direction to adjust the width of the drainage channel (303).

4. The coagulation bath device for para-aramid dry-jet wet spinning according to claim 1, characterized in that: The inner wall of the top of the accelerating tube (3) is provided with a sealing ring (33) for sealing the gap between the top of the accelerating tube (3) and the spinning tube (1).

5. The coagulation bath device for para-aramid dry-jet wet spinning according to claim 1, characterized in that: The material of the voltage stabilizing ring (4) is butyl rubber.

6. The coagulation bath device for para-aramid dry-jet wet spinning according to claim 1, characterized in that: A filament bundle ring (14) is provided at the connection between the spinning tube (1) and the overflow plate (11); the filament bundle ring (14) is configured as an arc-shaped annular protrusion and is used to guide the filament bundle into the spinning tube (1).

7. A coagulation bath device for para-aramid dry-jet wet spinning according to claim 6, characterized in that: A circular cover plate (12) is connected to the top of the overflow plate (11), and the inner diameter of the circular cover plate (12) is greater than the outer diameter of the wire binding ring (14).

8. The coagulation bath device for para-aramid dry-jet wet spinning according to claim 1, characterized in that: A pressure equalizing ring (22) is provided inside the overflow box (2), and the pressure equalizing ring (22) is located between the overflow plate (11) and the first water inlet pipe (21).

9. The coagulation bath device for para-aramid dry-jet wet spinning according to claim 1, characterized in that: The first water inlet pipe (21) is arranged on the bottom surface of the overflow box (2).

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