Gel silk solidification system and preparation method of ultra-high molecular weight polyethylene fiber

Abstract

The invention belongs to the technical field of high-performance fibers, and particularly relates to a gel silk solidification system and a preparation method of ultra-high molecular weight polyethylene fibers.The gel silk solidification system comprises a cooling water tank and a silk spraying assembly, the silk spraying assembly is connected with a bottom roller A through fibers sprayed by the silk spraying assembly, and the bottom roller A is connected with a bottom roller B through fibers; the bottom roller B is parallel to the bottom roller A relative to the inner bottom end of the cooling water tank, the bottom roller B is connected with two sets of three-rollers through gel threads formed after cellosilk is cooled through the cooling water tank, and the two sets of three-rollers are connected through the gel threads and connected with a silk outlet roller through the gel threads. The silk outlet roller is sequentially connected with a silk swinging rod and a silk containing barrel from top to bottom through gel silk. According to the method, the production stability, the product performance and color difference control can be remarkably improved, the production cost is reduced, the consistency of the retraction rate and the flexibility of a process window are improved, and powerful support is provided for wide application of the ultra-high molecular weight polyethylene fiber.

Description

Technical Field

[0001] The invention belongs to the technical field of high-performance fibers, and in particular relates to a jelly thread coagulation system and a preparation method of ultra-high molecular weight polyethylene fibers. Background Art

[0002] Ultra-high molecular weight polyethylene fiber is widely used in protective clothing, ropes, fishing nets, sports equipment, high-performance composite materials and other fields due to its excellent physical and chemical properties, such as high strength, high modulus, wear resistance, chemical corrosion resistance, etc. Ultra-high molecular weight polyethylene fiber usually includes multiple preparation steps such as spinning, coagulation, drawing, extraction, drying and heat setting. Currently, two-step wet spinning is used to produce ultra-high molecular weight polyethylene fiber. However, in the production process, it is difficult for the gel yarn to maintain the consistency of fineness after gel molding-dropping barrel-standing-barreling, so that the production stability, product performance and color difference are affected by the uneven fineness, thus limiting the scope of application.

[0003] In the prior art, there are studies on the uneven fineness of the jelly yarn produced by the two-step wet spinning method for ultra-high molecular weight polyethylene fibers after coagulation and setting, such as patent application CN106978654A-Coagulation and setting method of jelly yarn in the production process of ultra-high molecular weight polyethylene fibers, which solves the problem of uneven fineness of the jelly yarn produced by the two-step wet spinning method for ultra-high molecular weight polyethylene fibers by controlling the residence time of the jelly yarn in the cooling and setting tank, the concentration and temperature of the phase separation promoter, and the oil content of the jelly yarn out of the cooling and setting tank. After the gelling and fixing, there are problems of poor production stability and poor product performance consistency due to uneven fineness. Although the existing gelling and fixing method can control the morphology, thickness and structure of the dense layer on the surface of the ultra-high molecular weight polyethylene fiber gel, it is difficult to effectively control the uneven fineness caused by laminar disturbance of cooling water, making it difficult to effectively improve production stability, product performance and color difference, and it is also difficult to suppress the problem of changes in the running speed of the yarn bundle, which seriously affects the shrinkage rate of the gel and is prone to broken yarns. Therefore, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0004] The object of the present invention is to provide a jelly thread coagulation system and a method for preparing ultra-high molecular weight polyethylene fiber, so as to solve the problem proposed in the above background technology that the current jelly thread coagulation and fixing method is difficult to effectively control the uneven fineness caused by the laminar disturbance of cooling water, making it difficult to effectively improve the production stability, product performance and color difference, and it is also difficult to suppress the change in the running speed of the thread bundle, thereby seriously affecting the shrinkage rate of the jelly thread and easily causing the thread to break.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a jelly thread solidification system, comprising a cooling water trough and a spinneret assembly arranged on the upper part of the cooling water trough, the spinneret assembly is connected to a bottom roller A located at one end of the bottom of the cooling water trough through the fiber filaments sprayed therefrom, the bottom roller A is connected to a bottom roller B located at the other end of the bottom of the cooling water trough through the fiber filaments, the bottom roller B is arranged parallel to the bottom roller A relative to the bottom end of the cooling water trough, the bottom roller B is connected to two groups of three rollers located on the upper side of the cooling water trough through the jelly threads formed after the fiber filaments are cooled in the cooling water trough, and the jelly threads are pulled to the two groups of three rollers at 30 to 150 degrees at the bottom roller B, the two groups of three rollers are connected by the jelly threads and connected to the outlet roller arranged parallel to the end parts thereof through the jelly threads, and the outlet roller is connected to the swing rod and the wire holding barrel arranged in sequence from top to bottom below the outlet roller through the jelly threads.

[0006] Furthermore, the two groups of three rollers include a first group of three rollers and a second group of three rollers, the first group of three rollers are arranged in parallel with the second group of three rollers and are arranged on the same horizontal plane, the second group of three rollers are located at the rear end of the first group of three rollers and the front end of the silk-exiting roller; the first group of three rollers includes an upper roller A, a middle and lower roller A and an upper roller B, one end of the upper roller A is connected to the bottom roller B through a jelly thread at a degree of 30 to 150 and the other end is connected to the middle and lower roller A through a jelly thread, the middle and lower roller A is connected to the upper roller B through the jelly thread, and the upper roller B is connected to the second group of three rollers through the jelly thread The upper part of the upper roller B is tightly provided with a pressure roller A, and a gap A for passing the jelly thread is provided between the pressure roller A and the upper roller B; the second group of three rollers includes an upper roller C, a middle and lower roller B and an upper roller D, one end of the upper roller C is connected to the upper roller B through the jelly thread and the other end is connected to the middle and lower roller B through the jelly thread, the middle and lower roller B is connected to the upper roller D through the jelly thread, the upper roller D is connected to the silk outlet roller through the jelly thread, the upper part of the upper roller D is tightly provided with a pressure roller B, and a gap B for passing the fiber thread is provided between the pressure roller B and the upper roller D.

[0007] Furthermore, a water inlet distribution plate is fixed on an inner side wall of the cooling water trough, and the water inlet distribution plate is connected to a water inlet located at a lower end of one side outside the cooling water trough, and a water outlet is arranged at an upper end of the other side outside the cooling water trough.

[0008] Furthermore, the specific steps of preparing ultra-high molecular weight polyethylene fibers using the above-set jelly yarn coagulation system are as follows: first, the spinning stock solution of ultra-high molecular weight polyethylene is melted through the spinning box and then ejected through the spinneret assembly to form fiber yarns, which are then pulled onto the bottom roller A; secondly, the fiber yarns are pulled onto the bottom roller B through the bottom roller A and immersed in a cooling water tank with countercurrent cold water to cool and form jelly yarns; thirdly, the jelly yarns are pulled onto two groups of three rollers through the bottom roller B and leave the cooling water tank; then the jelly yarns leaving the cooling water tank are pulled onto the bottom roller B and left the cooling water tank. The jelly silk is pulled by two groups of three rollers to the silk outlet roller and the swinging wire rod and falls into the silk holding barrel; finally, the jelly silk is balanced and pre-stretched, extracted, dried and hot-stretched to form ultra-high molecular weight polyethylene fiber, wherein the silk outlet rate ratio between the bottom roller A and the spinneret of the spinneret assembly is 1 to 10; the silk bundle running rate ratios between the bottom roller A and the bottom roller B, between the bottom roller B and the first group of three rollers, between the first group of three rollers and the second group of three rollers, and between the second group of three rollers and the silk outlet roller are all 1 to 5.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a double bottom roller and double triple roller traction mode, so that the fiber filaments ejected from the spinneret assembly run more smoothly in the cooling water tank, which not only effectively avoids the influence of the laminar disturbance of the cooling water on the fineness of the jelly filaments, but also effectively increases the contact between the filament bundle and the roller surface, improves the stability of the filament bundle operation, reduces the influence of external factors on the filament bundle, and significantly improves the stability of the entire production process, so that the jelly filaments can always maintain a consistent fineness during subsequent treatments such as coagulation and drawing, effectively improves the physical properties (such as strength, modulus, etc.) of the final product, significantly improves the problem of product color difference, makes the product more uniform and consistent, and meets the high requirements of high-end application fields for material performance; 2. The present invention adopts a setting in which the running direction of the filament bundle pulled by the double three rollers is at an angle with the horizontal plane of the cooling water tank, so that the jelly filament bundle is accelerated to separate from the water after leaving the water surface, effectively reducing the workload of subsequent oil-water separation and distillation separation, thereby reducing the production cost. Through the close matching setting between the pressure roller A and the pressure roller B and the upper roller B and the upper roller D respectively, the running speed change of the jelly filament after leaving the cooling water tank is further controlled, avoiding the phenomenon of uneven fineness and broken filaments caused by speed fluctuations, and ensuring the continuity and stability of the filament bundle in the whole preparation process; 3. The present invention utilizes a cooling method of cold water countercurrent, so that the fiber filaments ejected from the spinneret assembly can be quickly and evenly cooled to form jelly filaments under the increasingly lower temperature field and the longer distance of the double water tank bottom roller, further improving the cooling efficiency, preventing the formation of jelly filaments with uneven thermal stress distribution of the skin and cold core due to the temperature field, and effectively improving the uniformity of the fineness, thereby ensuring production efficiency and product quality; 4. The present invention forms a reasonable drafting ratio by accurately controlling the ratio of the running speeds of each segment of the tow, which not only accelerates the solidification and forming of the jelly yarn, but also increases the orientation degree and pre-crystallization of the jelly yarn, so that the jelly yarn has a consistent shrinkage rate after static shrinkage, and also makes the jelly yarn have a higher process margin when high-multiple and high-speed drafting is performed, effectively reducing the shrinkage rate problem caused by speed mismatch, reducing the risk of broken yarn, and improving the product yield, thereby further improving production efficiency and product quality; 5. The jelly thread coagulation system and the preparation method of ultra-high molecular weight polyethylene fiber provided by the present invention enable the fiber thread to maintain good stability and consistency during the process of cooling to form jelly thread and drawing the jelly thread into the thread storage barrel, so that the jelly thread not only has a wider process window in the subsequent heat treatment, extraction, drying and other processes, but also has greater flexibility in the selection of parameters such as ambient temperature, process temperature, speed, etc., ensuring the flexibility and adaptability of the production process; 6. The jelly thread coagulation system and the preparation method of ultra-high molecular weight polyethylene fiber provided by the present invention can not only significantly improve the production stability, product performance and color difference control, but also effectively reduce the production cost, improve the consistency of shrinkage rate and the flexibility of process window, and provide strong support for the wide application of ultra-high molecular weight polyethylene fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the production process of the present invention; Figure 2 This is a statistical diagram of the test fineness uniformity data of Example 1 of the present invention; Figure 3 This is a statistical diagram of the test fineness uniformity data of Example 2 of the present invention; Figure 4 This is a statistical diagram of the test fineness uniformity data of Example 3 of the present invention; Figure 5 This is a statistical diagram of the test fineness uniformity data of Comparative Example 1 of the present invention; Figure 6 This is a statistical diagram of the test fineness uniformity data of Comparative Example 2 of the present invention; Figure 7 This is a statistical diagram of the test fineness uniformity data of Comparative Example 3 of the present invention.

[0011] Among them: 1. Cooling water trough; 101. Water inlet distribution plate; 102. Water inlet; 103. Water outlet; 2. Spinning assembly; 201. Spinning plate; 3. Fiber filaments; 4. Bottom roller A; 5. Bottom roller B; 6. Frozen gel filaments; 7. The first group of three rollers; 701. Upper roller A; 702. Middle and lower rollers A; 703. Upper roller B; 8. The second group of three rollers; 801. Upper roller C; 802. Middle and lower rollers B; 803. Upper roller D; 9. Pressing roller A; 10. Gap A; 11. Pressing roller B; 12. Gap B; 13. Wire outlet roller; 14. Screw rod; 15. Wire barrel. DETAILED DESCRIPTION

[0012] The following examples are used to further illustrate the content of the present invention, but do not limit the application of the present invention. Embodiment 1:

[0013] See also Figure 1The present embodiment provides a jelly thread solidification system, comprising a cooling water tank 1 for cooling and a spinneret assembly 2 arranged on the upper part of the cooling water tank 1 and used for spraying fiber threads, the spinneret assembly 2 is provided with a spinneret 201 and fiber threads 3 sprayed out through the spinneret 201, and at the same time, the fiber threads 3 are connected to a bottom roller A4 located at one end of the bottom of the cooling water tank 1 and used for traction, the bottom roller A4 is connected to a bottom roller B5 located at the other end of the bottom of the cooling water tank 1 through the fiber threads 3, the bottom roller B5 is arranged parallel to the bottom roller A4 relative to the bottom end of the cooling water tank 1, at this time, the fiber threads 3 are first pulled to the inside of the cooling water tank by the bottom rollers A4 and B5, and then passed through the cooling water tank. The jelly thread 6 is formed after cooling with cooling water (the fiber thread 3 before cooling and the jelly thread 6 after cooling are the same. In order to distinguish the changes before and after cooling, the thread before cooling is set as the fiber thread 3, and the thread after cooling is set as the jelly thread 6). At the same time, the bottom roller B5 is connected to the upper roller A701 of the first group of three rollers 7 located on the upper side of the cooling water tank 1 through the jelly thread 6 at 90 degrees, the upper roller A701 of the first group of three rollers 7 is connected to the middle and lower roller A702 of the first group of three rollers 7 through the jelly thread 6, the middle and lower roller A702 of the first group of three rollers 7 is connected to the upper roller B703 of the first group of three rollers 7 through the jelly thread 6, and the A pressure roller A9 for controlling the running speed of the yarn bundle is tightly arranged on the upper part of the upper roller B703, and a gap A10 for accommodating the passage of the frozen rubber thread 6 is arranged between the pressure roller A9 and the upper roller B703 in the first group of three rollers 7. The frozen rubber thread 6 passes through the middle and lower rollers A702 in the first group of three rollers 7 and enters the gap A10. It is pulled to the upper roller C801 in the second group of three rollers 8 through the upper roller B703 in the first group of three rollers 7. The upper roller C801 in the second group of three rollers 8 is connected to the middle and lower rollers B802 in the second group of three rollers 8 through the frozen rubber thread 6. The middle and lower rollers B802 in the second group of three rollers 8 are connected to the upper roller D803 in the second group of three rollers 8 through the frozen rubber thread 6. A pressure roller B11 for controlling the running speed of the yarn bundle is tightly arranged on the upper part of the upper roller D803 in the second group of three rollers 8, and a gap B12 for accommodating the passage of the jelly yarn 6 is arranged between the pressure roller B11 and the upper roller D803 in the second group of three rollers 8. The jelly yarn 6 passes through the middle and lower rollers B802 in the second group of three rollers 8 and enters the gap B12. It is pulled by the upper roller D803 in the second group of three rollers 8 to the outlet roller 13 arranged in parallel at the end of the upper roller D803 in the second group of three rollers 8. The outlet roller 13 is connected with the swinging wire rod 14 for guiding and the wire barrel 15 for dropping the wire, which are arranged in sequence from top to bottom below the outlet roller 13 through the jelly yarn 6; A water inlet distribution plate 101 is fixed on an inner wall of the cooling water tank 1, and the water inlet distribution plate 101 is connected to a water inlet 102 located at the lower end of one side of the outside of the cooling water tank 1, and a water outlet 103 is provided at the upper end of the other side of the outside of the cooling water tank 1, so that the cooling water tank 1 has the characteristic of cold water counterflow; The specific steps of preparing ultra-high molecular weight polyethylene fibers using the above-set jelly yarn coagulation system are as follows: First, the spinning solution of ultra-high molecular weight polyethylene is melted through a spinning manifold (the functions and structures of conventional equipment such as a spinning manifold are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and it is not shown in the drawings). The fiber filaments 3 are ejected through the spinneret 201 of the spinneret assembly 2 and drawn onto the bottom roller A4. At this time, the ratio of the fiber output rate between the bottom roller A4 and the spinneret 201 of the spinneret assembly 2 is 3; Secondly, the fiber filament 3 is pulled onto the bottom roller B5 via the bottom roller A4. At this time, the ratio of the fiber bundle running speed between the bottom roller A and the bottom roller B is 1.25. The fiber filament 3 is completely immersed in the cooling water tank 1 with cold water countercurrent to cool and form the jelly filament 6. Next, the jelly thread 6 is pulled to the first set of three rollers 7 at a 90-degree angle through the bottom roller B5. At this time, the ratio of the thread bundle running speed between the bottom roller B5 and the first set of three rollers 7 is 1.25. The specific path of the jelly thread 6 being pulled to the first set of three rollers 7 is firstly pulled from the upper roller A701 to the middle and lower roller A702, and then pulled from the middle and lower roller A702 to the gap A10 between the upper roller B703 and the pressure roller A9, and then through the pressure roller A9 and the upper roller. B703 is pulled onto the second set of three rollers 8. At this time, the ratio of the tow running speed of the first set of three rollers 7 to that of the second set of three rollers 8 is also 1.25. The specific path of the jelly filament 6 being pulled onto the first set of three rollers 7 is firstly pulled from the upper roller C801 to the middle and lower roller B802, and then pulled from the middle and lower roller B802 to the gap B12 between the upper roller D803 and the pressure roller B11, and then pulled away from the cooling water tank 1 through the pressure roller B11 and the upper roller D803; Then, the jelly thread 6 leaving the cooling water tank 1 is pulled onto the silk-exiting roller 13 through the upper roller D803 and the pressure roller B11 of the second set of three rollers 8. At this time, the ratio of the silk bundle running speed between the second set of three rollers 8 and the silk-exiting roller is 1.25. Then, the jelly thread 6 is pulled from the silk-exiting roller 13 to the swinging wire rod 14, and finally falls into the silk-containing barrel 15. Finally, the frozen gel filaments 6 are balanced and then pre-stretched, extracted, dried, and hot-stretched to form ultra-high molecular weight polyethylene fibers. The uniformity test data of the ultra-high molecular weight polyethylene fibers are as follows: Figure 2 As shown in the figure, red represents uneven fineness, yellow represents fair uniformity, and green and colorless represent good uniformity. Embodiment 2:

[0014] The jelly thread solidification system of this embodiment is consistent with that of the embodiment 1, except that the jelly thread 6 has a different water outlet angle, that is, the jelly thread 6 is pulled to the first set of three rollers 7 at an angle of 30 degrees through the bottom roller B5; Similarly, the preparation method of the ultra-high molecular weight polyethylene fiber of this embodiment is also the same as that of Embodiment 1, except that the ratio of the spinning rate and the ratio of the filament bundle running rate are inconsistent, that is, the ratio of the spinning rate between the bottom roller A4 and the spinneret 201 of the spinneret assembly 2 is 10; the ratio of the filament bundle running rate between the bottom roller A4 and the bottom roller B5, between the bottom roller B5 and the first group of three rollers 7, between the first group of three rollers 7 and the second group of three rollers 8, and between the second group of three rollers 8 and the spinning roller 13 are all 1; The uniformity test data of the obtained ultra-high molecular weight polyethylene fiber is as follows: Figure 3 As shown in the figure, red represents uneven fineness, yellow represents fair uniformity, and green and colorless represent good uniformity. Embodiment 3:

[0015] The jelly thread solidification system of this embodiment is consistent with that of the embodiment 1, except that the jelly thread 6 has a different water outlet angle, that is, the jelly thread 6 is pulled to the first set of three rollers 7 at an angle of 150 degrees through the bottom roller B5; Similarly, the preparation method of the ultra-high molecular weight polyethylene fiber of this embodiment is also the same as that of Embodiment 1, except that the ratio of the spinning rate and the ratio of the filament bundle running rate are inconsistent, that is, the ratio of the spinning rate between the bottom roller A4 and the spinneret 201 of the spinneret assembly 2 is 1; the ratio of the filament bundle running rate between the bottom roller A4 and the bottom roller B5, between the bottom roller B5 and the first group of three rollers 7, between the first group of three rollers 7 and the second group of three rollers 8, and between the second group of three rollers 8 and the spinning roller 13 are all 5; The uniformity test data of the obtained ultra-high molecular weight polyethylene fiber is as follows: Figure 4 As shown in the figure, red represents uneven fineness, yellow represents fair uniformity, and green and colorless represent good uniformity.

[0016] Comparative Example 1: Compared with Example 1, the gel thread coagulation system in this comparative example does not have the bottom roller B5 and the first group of three rollers 7, and the water outlet angle of the gel thread 6 is only 15 degrees, and the ratio of the thread outlet rate and the ratio of the thread bundle running rate are not controlled. The uniformity test data of the obtained ultra-high molecular weight polyethylene fiber is as follows: Figure 5 As shown in the figure, red represents uneven fineness, yellow represents fair uniformity, and green and colorless represent good uniformity.

[0017] Comparative Example 2: Compared with Example 1, the gel thread coagulation system in this comparative example does not have the bottom roller B5 and the first group of three rollers 7, and the water outlet angle of the gel thread 6 is only 160 degrees, and the ratio of the yarn outlet rate and the yarn bundle running rate ratio are not controlled. The uniformity test data of the obtained ultra-high molecular weight polyethylene fiber is as follows: Figure 6 As shown in the figure, red represents uneven fineness, yellow represents fair uniformity, and green and colorless represent good uniformity.

[0018] Comparative Example 3: The gel filament coagulation system and the preparation method of the ultra-high molecular weight polyethylene fiber in this comparative example are the same as those in comparative example 1. However, compared with comparative example 1, the ratio of the yarn output rate in this comparative example is controlled at 12, and the ratio of the yarn bundle running rate is controlled at 7. The uniformity test data of the ultra-high molecular weight polyethylene fiber obtained is as follows: Figure 7 As shown in the figure, red represents uneven fineness, yellow represents fair uniformity, and green and colorless represent good uniformity.

[0019] Depend on Figure 2-Figure 7 The comparison of the uniformity test data of the ultra-high molecular weight polyethylene fibers shows that the uniformity of the fineness of Examples 1-3 is significantly better than that of Comparative Examples 1-3. The water outlet angle of the frozen gel yarn 6, the ratio of the yarn outlet rate and the ratio of the yarn bundle running rate are all important indicators for measuring the uniformity of the fineness. Therefore, the use of the double bottom roller and double triple roller traction method not only avoids the influence of the laminar disturbance of the cooling water on the fineness of the frozen gel yarn, but also increases the contact between the yarn bundle and the roller surface, improves the stability of the yarn bundle operation, reduces the influence of external factors on the yarn bundle, and significantly improves the stability of the entire production process, thereby making the frozen gel yarn 6 The rubber filament can always maintain a consistent fineness during the subsequent treatment processes such as coagulation and drawing. By accurately controlling the ratio of the running speeds of each segment of the filament bundle to form a reasonable drawing ratio, it not only accelerates the coagulation and forming of the frozen rubber filament, but also increases the orientation degree and pre-crystallization of the frozen rubber filament, so that the frozen rubber filament has a consistent shrinkage rate after static shrinkage, and also makes the process margin of the frozen rubber filament higher during high-multiple and high-speed drawing, effectively reducing the shrinkage rate problem caused by speed mismatch, reducing the risk of wire breakage, and improving the product yield, thereby further improving production efficiency and product quality.

Claims

1. A jelly thread solidification system, comprising a cooling water tank and a spinneret assembly arranged on the upper part of the cooling water tank, wherein the fiber threads ejected by the spinneret assembly are connected to a bottom roller A located at one end of the bottom of the cooling water tank, characterized in that: The bottom roller A is connected to the bottom roller B located at the other end of the bottom in the cooling water trough through the fiber filaments. The bottom roller B is arranged parallel to the bottom roller A relative to the bottom end in the cooling water trough. The bottom roller B is connected to two groups of three rollers located on the upper side of the cooling water trough through the jelly filaments formed after the fiber filaments are cooled in the cooling water trough. The two groups of three rollers are connected by the jelly filaments and are connected to the wire outlet roller arranged parallel to the end parts thereof through the jelly filaments. The wire outlet roller is connected to the swinging wire rod and the wire containing barrel arranged in sequence from top to bottom below the wire outlet roller through the jelly filaments.

2. A jelly thread solidification system according to claim 1, characterized in that: The jelly thread is pulled onto two groups of three rollers at an angle of 30 to 150 degrees at the bottom roller B.

3. A jelly thread solidification system according to claim 2, characterized in that: The two groups of three rollers include a first group of three rollers and a second group of three rollers, the first group of three rollers are arranged in parallel with the second group of three rollers and are arranged on the same horizontal plane, and the second group of three rollers are located at the rear end of the first group of three rollers and the front end of the wire outlet roller.

4. A jelly thread solidification system according to claim 3, characterized in that: The first group of three rollers includes an upper roller A, a middle and lower roller A and an upper roller B. One end of the upper roller A is connected to the bottom roller B through a jelly thread with an angle of 30 to 150 degrees and the other end is connected to the middle and lower roller A through a jelly thread. The middle and lower roller A is connected to the upper roller B through the jelly thread, and the upper roller B is connected to the second group of three rollers through the jelly thread.

5. A jelly thread solidification system according to claim 4, characterized in that: A pressing roller A is closely arranged on the upper part of the upper roller B, and a gap A is arranged between the pressing roller A and the upper roller B for allowing the jelly wire to pass through.

6. A jelly thread solidification system according to claim 4, characterized in that: The second group of three rollers includes an upper roller C, a middle and lower roller B and an upper roller D. One end of the upper roller C is connected to the upper roller B through a jelly thread and the other end is connected to the middle and lower roller B through a jelly thread. The middle and lower roller B is connected to the upper roller D through a jelly thread, and the upper roller D is connected to the silk outlet roller through the jelly thread.

7. A jelly thread solidification system according to claim 6, characterized in that: A pressing roller B is closely arranged on the upper part of the upper roller D, and a gap B is arranged between the pressing roller B and the upper roller D for allowing the fiber to pass through.

8. The jelly thread solidification system according to claim 1, characterized in that: A water inlet distribution plate is fixed on an inner side wall of the cooling water trough, and the water inlet distribution plate is connected to a water inlet located at the lower end of one side outside the cooling water trough, and a water outlet is arranged at the upper end of the other side outside the cooling water trough.

9. A method for preparing ultra-high molecular weight polyethylene fiber, characterized in that: The specific steps of preparing ultra-high molecular weight polyethylene fibers using a jelly yarn coagulation system as described in any one of claims 1 to 8 are as follows: first, the spinning stock solution of ultra-high molecular weight polyethylene is melted through a spinning box and then sprayed out through a spinneret assembly to form fiber yarns that are pulled onto bottom roller A; secondly, the fiber yarns are pulled onto bottom roller B through bottom roller A and immersed in a cooling water tank with countercurrent cold water to cool down to form jelly yarns; thirdly, the jelly yarns are pulled onto two groups of three rollers through bottom roller B to leave the cooling water tank; then, the jelly yarns that leave the cooling water tank are pulled onto the silk outlet roller and the swinging wire rod through two groups of three rollers and fall into the silk holding barrel; finally, the jelly yarns are balanced and pre-stretched, extracted, dried, and hot-stretched to form ultra-high molecular weight polyethylene fibers.

10. The method for preparing ultra-high molecular weight polyethylene fiber according to claim 9, characterized in that: The ratio of the filament output rate between the bottom roller A and the spinneret of the spinneret assembly is 1 to 10; the ratio of the filament bundle running rate between the bottom roller A and the bottom roller B, between the bottom roller B and the first group of three rollers, between the first group of three rollers and the second group of three rollers, and between the second group of three rollers and the filament output roller are all 1 to 5.

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