A spinneret device for preparing flame-retardant fibers

Abstract

The present invention relates to the technical field of spinning, and specifically relates to a spinning device for preparing flame-retardant fibers, which includes a base. A conveyor belt assembly is arranged at the inner top of the base. The spinning device further includes: a fixing mechanism, which includes a fixing box slidably connected to the bottom of a carriage, and a spinning nozzle is located inside the fixing box. A plurality of arc-shaped guiding pieces are fixedly connected to the inner walls of the opposite sides of the fixing box. On the other two sides of the fixing box, there are respectively a flame retardant spraying mechanism for spraying flame retardant powder on the spun filaments and a flame retardant recovery mechanism for recovering the excess flame retardant powder in the spun filaments; the flame retardant spraying mechanism includes a spraying box fixedly communicated with the side of the fixing mechanism. Through the spraying assembly, cooling assembly and air guiding assembly in the flame retardant spraying mechanism, it is possible to gradually cool and spray flame retardant powder on the fiber filaments just ejected by the spinning device. This method effectively solves the key problems in the treatment of fiber filaments and improves the efficiency of the entire production process and the product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber preparation, and particularly relates to a spinneret device for preparing flame-retardant fibers. Background Art

[0002] The spinneret device extrudes molten materials into fibers through the melting method. The spinneret device for preparing flame-retardant fibers is usually referred to as a "spinneret plate" or a "spinneret head", which is used to extrude molten fiber materials through multiple spray holes to form slender fibers, such as a preparation device and method for superfine denier flame-retardant polyester filaments disclosed in a Chinese patent with the publication number CN117051485A.

[0003] For the existing spinneret devices for preparing flame-retardant fibers, flame retardants are usually added through two methods: modification and film coating. Modifying and adding flame retardants usually involves directly mixing the flame retardant into the fiber raw materials during the fiber production process, while film coating and adding flame retardants means that after the fibers are formed, a protective film is formed by coating the flame retardant on the fiber surface.

[0004] Among them, adding flame retardants by the film coating method can form a protective layer on the fiber surface, thereby improving the flame retardant performance, and at the same time avoiding the migration or loss of the flame retardant in the fiber, and thus being widely used. The existing equipment cools the fiber filaments sprayed by the spinneret device and then coats the flame retardant through two methods: spraying and soaking;

[0005] Among them, when coating the flame retardant by spraying, since the fiber filaments at this time are the cooled fiber filaments, and the surface of the fiber filaments becomes smoother and drier after cooling, the adhesion of the flame retardant will be weakened, thus affecting the flame retardant effect. At the same time, the surface of the fiber filaments after cooling will show non-uniformity, resulting in difficulty in achieving uniform coverage when spraying or coating the flame retardant, leading to insufficient local flame retardant performance of the fiber filaments, and further affecting the flame retardant effect of the overall fiber filaments. Summary of the Invention

[0006] Aiming at the above-mentioned drawbacks of the existing technology, the present invention provides a spinneret device for preparing flame-retardant fibers, which can effectively solve the problem that in the existing technology, the fiber filaments sprayed by the spinneret device are cooled and then the flame retardant is added, resulting in weakened adhesion of the flame retardant and affecting the flame retardant effect.

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] The present invention provides a spinneret device for preparing flame-retardant fibers, comprising:

[0009] Base, a conveyor belt assembly is arranged at the inner top of the base, a carriage is fixedly connected to the top of the base, a spinneret is slidably connected to the bottom of the carriage, the spinneret is fixedly communicated with a spinning machine for providing raw materials, and further includes:

[0010] Fixing mechanism, the fixing mechanism includes a fixing box slidably connected to the bottom of the carriage, and the spinneret is located inside the fixing box. A plurality of arc-shaped guiding pieces are fixedly connected to the opposite inner walls of the fixing box. The other two inner walls of the fixing box are respectively provided with a flame retardant spraying mechanism for spraying flame retardant powder on the spinneret and a flame retardant recovery mechanism for recovering excess flame retardant powder in the spinneret;

[0011] The flame retardant spraying mechanism includes a spraying box fixedly communicated with the side of the fixing mechanism. A pair of spraying components for spraying flame retardant powder are symmetrically arranged up and down in the middle of the spraying box. A wind guiding component for buffering the spraying air flow is arranged on the opposite side of the pair of spraying components in the middle of the spraying box. A cooling component for providing cold air for cooling the spinneret is arranged on the inner wall of the spraying box corresponding to the wind guiding component.

[0012] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art:

[0013] 1. For the spinneret device for preparing flame retardant fibers, through the spraying component, cooling component and wind guiding component in the flame retardant spraying mechanism, the fiber filaments just ejected from the spinneret device can be cooled. Among them, the cooling component can convert the absorbed natural wind into cold air for cooling the fiber filaments, and the wind guiding component can reduce the wind speed of the air flow cooled by the cooling component, so as to avoid the directly acting of the cooled air flow on the fiber filaments, resulting in a relatively chaotic descending phenomenon of the fiber filaments, which affects the subsequent spraying of flame retardant powder on the fiber filaments by the spraying component. The combined application of the cooling component and the wind guiding component has obvious advantages in improving the adhesion effect of the flame retardant, reducing the chaos of the fiber filaments, optimizing the production process, stabilizing the flame retardant effect, reducing the production cost and improving the fiber quality.

[0014] 2. For the spinneret device for preparing flame retardant fibers, through the absorption tube and the first detector, the excess flame retardant powder sprayed onto the fiber filaments in the flame retardant spraying mechanism can be recovered to achieve the reuse of the flame retardant powder, and at the same time, it can also avoid the large accumulation of the flame retardant powder in a certain area of the fiber filaments, resulting in uneven distribution of the flame retardant powder in the fiber filaments. The first detector can detect the air flow and the powder distribution amount when the absorption tube absorbs the flame retardant powder. The recycling and monitoring of the flame retardant through the absorption tube and the first detector can effectively improve the utilization efficiency of the flame retardant, optimize the uniformity of the flame retardant distribution, reduce waste and environmental impact, enhance the control accuracy of the production process, and improve the product quality and consistency. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram of the whole of the present invention;

[0017] Figure 2 Structural schematic diagram of the side of the whole of the present invention;

[0018] Figure 3 Structural schematic diagram of the carriage of the present invention;

[0019] Figure 4 Structural schematic diagram of the fixing mechanism of the present invention;

[0020] Figure 5 Structural schematic diagram of the spraying assembly of the present invention;

[0021] Figure 6 Internal structural schematic diagram of the spraying assembly of the present invention;

[0022] Figure 7 Structural schematic diagram of the air guiding assembly of the present invention;

[0023] Figure 8 Structural schematic diagram of the spraying assembly of the present invention;

[0024] Figure 9 Structural schematic diagram of the cooling assembly of the present invention;

[0025] Figure 10 Structural schematic diagram of the recycling mechanism of the present invention;

[0026] Figure 11 Internal structural schematic diagram of the recycling of the present invention;

[0027] Figure 12 Internal structural schematic diagram of the storage mechanism of the present invention;

[0028] Figure 13 Structural schematic diagram of the air flow box of the present invention;

[0029] Figure 14 Structural schematic diagram of the crushing assembly of the present invention.

[0030] Reference numerals: 1, base; 11, conveyor belt assembly; 12, carriage; 13, spinneret;

[0031] 2. Fixing mechanism; 21. Fixing box; 22. Arc-shaped guiding piece;

[0032] 3. Flame retardant spraying mechanism; 31. Spraying box; 32. Spraying assembly; 321. Airbag; 322. Connecting block; 323. Inclined plate; 324. Arc-shaped pipe; 3241. Spray hole; 3242. Telescopic groove; 3243. Telescopic column; 33. Three-way valve; 34. Measuring ball; 35. First telescopic pipe; 36. Connecting pipe; 37. Cooling assembly; 371. Installation box; 372. First square hole; 373. Cooling pipe; 374. Shunt groove; 38. Air guiding assembly; 381. Fixed column; 382. Connecting rod; 383. Force-receiving disc; 384. Airflow bowl; 39. Spraying box protection plate; 391. Hole; 310. Exhaust fan;

[0033] 4. Flame retardant recycling mechanism; 41. Recycling box; 42. Absorption pipe; 421. Circular hole; 422. Square groove; 43. First detector; 44. Second telescopic pipe; 45. Recycling box protection plate; 46. Converging pipe;

[0034] 5. Flame retardant storage mechanism; 51. Storage box; 52. Power assembly; 521. Powder suction pump; 522. Output pipe; 523. Input pipe; 53. Airflow box; 531. Rotating fan part; 54. Crushing assembly; 541. Rotating column; 542. Force-receiving cone; 543. Crushing knife; 55. Porous partition board; 56. Eddy current fan; 57. Second detector; 58. Feeding pipe; 59. Indicator light; 510. Recycling pipe. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention will be further described below with reference to the embodiments.

[0037] Embodiment: Refer to Figures 1 to 14 , a spinneret device for preparing flame retardant fibers, including:

[0038] Including a base 1, a conveyor belt assembly 11 is arranged at the inner top of the base 1, a sliding frame 12 is fixedly connected to the top of the base 1, a spinneret 13 is slidably connected to the bottom of the sliding frame 12, the spinneret 13 is fixedly communicated with a spinning machine for providing raw materials, and further includes:

[0039] Fixing mechanism 2, the fixing mechanism 2 includes a fixing box 21 slidably connected to the bottom of the carriage 12, and the spinneret 13 is located inside the fixing box 21. Arc-shaped guiding pieces 22 are fixedly connected to the opposite inner walls of the fixing box 21. A flame retardant spraying mechanism 3 for spraying flame retardant powder on the spinneret and a flame retardant recycling mechanism 4 for recycling excess flame retardant powder in the spinneret are respectively arranged on the other two inner walls of the fixing box 21;

[0040] The flame retardant spraying mechanism 3 includes a spraying box 31 fixedly communicated with the side of the fixing mechanism 2. A pair of spraying components 32 for spraying flame retardant powder are symmetrically arranged up and down in the middle of the spraying box 31. A wind guiding component 38 for buffering the spraying airflow is arranged on the opposite side of the pair of spraying components 32 in the middle of the spraying box 31. A cooling component 37 for providing cold air for cooling the spinneret is arranged on the inner wall of the spraying box 31 corresponding to the wind guiding component 38;

[0041] The fixing mechanism 2 can be used to realize the spatial limitation of the fiber filaments sprayed by the spinneret 13. At the same time, the fixing mechanism 2 can also fix the flame retardant spraying mechanism 3 and the flame retardant recycling mechanism 4, so that the flame retardant spraying mechanism 3 and the flame retardant recycling mechanism 4 can move correspondingly with the movement of the spinneret 13, thereby ensuring that the flame retardant spraying mechanism 3 and the flame retardant recycling mechanism 4 can always act on the fiber filaments sprayed by the spinneret 13.

[0042] Refer to Figures 5 to 6 As shown in, the spraying component 32 includes a plurality of interconnected airbag bags 321 linearly arranged along the length direction of the spraying box 31. A pair of inclined plates 323 are symmetrically and fixedly connected to the side of each airbag bag 321 facing the fixing box 21. An arc-shaped pipe 324 is fixedly communicated with the opposite side of each airbag bag 321 between the pair of inclined plates 323, and the arc surface of the arc-shaped pipe 324 faces the fixing box 21. A plurality of spray holes 3241 and a plurality of telescopic grooves 3242 are alternately arranged on the arc surface of the arc-shaped pipe 324. Telescopic columns 3243 fixedly connected to the inner wall of the spraying box 31 are fixedly connected to both sides of the arc-shaped pipe 324. The airbag bag 321 close to the inner wall of the spraying box 31 is fixedly communicated with a connecting block 322, and a connecting pipe 36 is fixedly communicated with the opposite side of the connecting block 322. A three-way valve 33 is fixedly connected to the outer wall of the spraying box 31. Two metering balls 34 with different sizes are respectively fixedly communicated with the two output ends of the three-way valve 33 through pipes. The smaller metering ball 34 is fixedly communicated with the airbag bag 321 above the spraying box 31 through a pipe, and the larger metering ball 34 is fixedly communicated with the airbag bag 321 below the spraying box 31 through a pipe. The input end of the three-way valve 33 is fixedly communicated with a first telescopic pipe 35.

[0043] By utilizing the elasticity of the airbag 321 in the spraying assembly 32, the airbag 321 can change to different degrees in the face of different contents of flame retardant powder. The flame retardant powder transmitted inside the airbag 321 will further be transferred to the arc tube 324, and the flame retardant powder will be sprayed onto the fiber filaments through the spray holes 3241 in the arc tube 324. The telescopic grooves 3242 in the arc tube 324 can ensure the elasticity of the arc tube 324, so that the length of the arc tube 324 can extend correspondingly with the change of the airbag 321.

[0044] Referring to Figures 6 to 9 It further includes a cooling assembly 37. The cooling assembly 37 includes an installation box 371 fixedly connected to the inner wall of the spraying box 31. A cooling pipe 373 is fixedly connected inside the installation box 371. On one side of the installation box 371 facing the air guiding assembly 38, a pair of first square holes 372 and a group of diversion grooves 374 are symmetrically arranged up and down. Each pair of first square holes 372 has multiple and is linearly arrayed on one side of the installation box 371. The group of diversion grooves 374 has multiple and is linearly arrayed and arranged on one side of the installation box 371.

[0045] By using the cooling pipe 373 in the cooling assembly 37, the air flow can be cooled, thereby enhancing the cooling effect on the fiber filaments. And through the first square holes 372 and the diversion grooves 374, different degrees of air flow effects on the fiber filaments can be achieved, so as to realize different temperature drops in different regions of the fiber filaments.

[0046] Referring to Figures 5 to 9 The air guiding assembly 38 includes fixed columns 381 rotatably connected to the inner walls on both sides of the spraying box 31. Multiple groups of connecting rods 382 are linearly arrayed on the outer peripheral surface of the fixed columns 381. Each group of connecting rods 382 is annularly arrayed on the outer peripheral surface of the fixed columns 381. One end of each connecting rod 382 away from the fixed column 381 is fixedly connected with a force receiving disk 383 whose inclined direction faces the spraying box 31. A plurality of air flow bowls 384 are fixedly connected to one side of the force receiving disk 383 away from the fixed column 381;

[0047] On both sides of the spraying box 31, there are respectively provided a spraying box protection plate 39 and a pair of exhaust fans 310 corresponding to the position of the cooling assembly 37. The spraying box protection plate 39 faces the spraying box 31, and a plurality of groups of holes 391 corresponding to the spraying assembly 32 and the air guiding assembly 38 are opened on the side surface of the spraying box protection plate 39.

[0048] By using the air guiding assembly 38, the air flow cooled by the cooling assembly 37 can be buffered, so as to reduce the flow velocity of the cooled air flow. And through the force receiving disk 383 and the air flow bowls 384, the decelerated air flow can be scattered, thereby avoiding the violent collision between the air flow and the fiber filaments, which may cause large shaking of the fiber filaments and then adhesion between the fiber filaments.

[0049] Reference Figures 10 to 11 It further includes a flame retardant recycling mechanism 4. The flame retardant recycling mechanism 4 includes a recycling box 41 fixedly connected to the side of the fixing mechanism 2. A pair of absorption tubes 42 for recycling flame retardant powder are symmetrically arranged up and down in the middle of the recycling box 41. A first detector 43 for detecting the state during the recycling of flame retardant powder is arranged in the middle of the recycling box 41 and on the opposite side of the pair of absorption tubes 42. A recycling box protection plate 45 is fixedly connected to the side of the recycling box 41 facing the fixing box 21. A plurality of square holes are arranged in a rectangular array on the side of the recycling box protection plate 45;

[0050] Circular holes 421 and square grooves 422 are alternately arranged on the outer peripheral surface of the absorption tube 42. A connecting pipe 46 is fixedly connected to the side of the recycling box 41 away from the fixing box 21. The input ends of the connecting pipe 46 respectively penetrate the recycling box 41 and are communicated with the pair of absorption tubes 42. The output end of the connecting pipe 46 is fixedly communicated with a second telescopic pipe 44.

[0051] The absorption tube 42 and the connecting pipe 46 can absorb and recycle the excess flame retardant powder sprayed into the fiber filaments by the spraying assembly 32, thereby preventing the local accumulation of the flame retardant powder in the fiber filaments, which may lead to uneven distribution of the flame retardant powder in the fiber filaments and further affect the flame retardant effect of the fiber filaments.

[0052] Reference Figures 12 to 13 It further includes a flame retardant storage mechanism 5. The flame retardant storage mechanism 5 includes a storage box 51 fixedly connected to the side of the base 1. A power assembly 52 is arranged on the top of the storage box 51. An air flow box 53, a plurality of crushing assemblies 54 and a porous partition plate 55 are sequentially arranged on the inner wall of the storage box 51 from top to bottom;

[0053] The power assembly 52 includes a powder suction pump 521 fixedly connected to the top of the storage box 51. The output end and the input end of the powder suction pump 521 are respectively fixedly communicated with an output pipe 522 and an input pipe 523. The end of the output pipe 522 away from the powder suction pump 521 is fixedly communicated with the first telescopic pipe 35. The end of the input pipe 523 away from the powder suction pump 521 penetrates the storage box 51 and is communicated with the air flow box 53. A plurality of holes are arranged in a rectangular array on the side of the air flow box 53 facing the inside of the storage box 51, and a rotating fan member 531 is rotatably connected in each hole.

[0054] By using the air flow box 53 and the crushing assemblies 54 in the storage box 51, the recycled or supplemented flame retardant powder can be pulverized before spraying, thereby preventing the caking phenomenon of the flame retardant powder in the storage box 51 and affecting the spraying effect of the spraying assembly 32 on the flame retardant powder.

[0055] Reference Figure 14, the crushing assembly 54 includes a rotating column 541 rotatably connected to the inner wall of the storage tank 51. At both ends of the outer peripheral surface of the rotating column 541, a plurality of force cones 542 are fixedly connected in an annular array. On the outer peripheral surface of the rotating column 541, multiple groups of crushing knives 543 are fixedly connected in a linear array. Each group of crushing knives 543 is fixedly arranged on the outer peripheral surface of the rotating column 541 in an annular array.

[0056] By using the force cones 542 in the crushing assembly 54, when the flame retardant powder is transported, the flowing force generated can be converted into the power for the rotation of the rotating column 541, thereby driving the crushing knives 543 to rotate. The rotating crushing knives 543 can crush the flame retardant powder, thus preventing the caked flame retardant powder from entering the spraying assembly 32, which may cause blockage of the spraying assembly 32 and further affect the subsequent spraying effect of the spraying assembly 32.

[0057] Refer to Figure 1 , Figure 12 , a plurality of eddy current fans 56 are rotatably connected to the inner bottom of the storage tank 51 and a second detector 57 is provided. The opposite sides of the storage tank 51 are respectively fixedly communicated with a feeding pipe 58 and a recovery pipe 510. One end of the recovery pipe 510 away from the storage tank 51 is fixedly communicated with the second telescopic pipe 44. An indicator light 59 is fixedly connected to the side of the storage tank 51.

[0058] By using the eddy current fans 56 in the storage tank 51, the accumulation of the flame retardant powder at the inner bottom of the storage tank 51 can be avoided, thus affecting the flowing effect of the flame retardant powder in the storage tank 51. The second detector 57 in the storage tank 51 can detect the suction force of the power assembly 52 on the flame retardant powder in the storage tank 51, thereby judging the spraying state of the spraying assembly 32.

[0059] The working principle of the present invention is as follows:

[0060] The first step: First, start the equipment. As the equipment starts, the conveyor belt assembly 11 starts to work. At the same time, the raw material equipment (the raw material equipment is prior art, so it is not shown in the figure) starts to supply the raw material for making fiber filaments to the spinneret 13 (the spinneret 13 is prior art. The spinneret 13 extrudes the molten or dissolved raw material (such as plastic or synthetic fiber) through small spray holes to form fiber filaments. At the same time, a horizontal driver for driving the spinneret 13 to slide in the carriage 12 and a motor for driving the spinneret 13 to rotate are provided in the spinneret 13). As the raw material for making fiber filaments continuously enters the spinneret 13, the horizontal driver in the spinneret 13 starts to operate, thereby driving the spinneret 13 to perform horizontal reciprocating motion in the carriage 12. At the same time, the spinneret 13 starts to rotate at a low speed;

[0061] With the operation of the spinneret 13, the fixed box 21 also set in the carriage 12 starts to move horizontally back and forth along the carriage 12 (a horizontal drive is also set in the fixed box 21), and the horizontal reciprocating movement of the fixed box 21 always maintains the same speed as the movement of the spinneret 13. With the operation of the spinneret 13 and the fixed box 21, the fiber filaments sprayed by the spinneret 13 will be sprayed into the conveyor belt assembly 11 in a rotating manner (the fiber filaments are sprayed in a rotating manner because the spinneret 13 is in a rotating state during the spinning process), and the rotating fiber filaments are more conducive to the subsequent spraying assembly 32 spraying the flame retardant powder on them comprehensively (when the fiber filaments are in a rotating state, the surface of the fiber filaments will be exposed to the spraying area in a more uniform manner. This rotational movement helps to ensure that the flame retardant powder can be more evenly distributed on all surfaces and corners of the fiber filaments, avoiding the accumulation or omission of the flame retardant).

[0062] Among them, when the spinneret 13 starts to spray fiber filaments, the flame retardant spraying mechanism 3 and the flame retardant recovery mechanism 4 start to be activated synchronously;

[0063] With the activation of the flame retardant spraying mechanism 3, the flame retardant powder stored in the flame retardant storage mechanism 5 will be transported to the three-way valve 33 through the first telescopic tube 35 (the subsequent flame retardant powder is simply referred to as powder, and the first telescopic tube 35 will extend or contract as the fixed box 21 moves in the carriage 12), and the three-way valve 33 will transport the powder to two measuring balls 34 of different sizes for storage. The smaller measuring ball 34 will further transport the powder to the spraying assembly 32 located above the spraying box 31. As the powder in the smaller measuring ball 34 enters the multiple airbag bags 321 of the spraying assembly 32, the originally contracted airbag bags 321 start to expand (the degree of expansion of the airbag bags 321 is determined by the amount of powder in the measuring ball 34. The larger the volume of the measuring ball 34, the more powder it stores, and the greater the degree of expansion of the airbag bags 321. Conversely, the smaller the volume of the measuring ball 34, the less powder it stores, and the smaller the degree of expansion of the airbag bags 321). Since the airbag bags 321 provide a flexible and stable transmission method, it can avoid the powder from being vibrated or impacted during transportation, ensuring the uniformity and consistency of the powder when it reaches the destination. At the same time, through the airbag bags 321, the conveying speed and quality of the powder can be precisely controlled, improving the control accuracy of the production process. As the multiple airbag bags 321 expand, the length of the multiple airbag bags 321 in the spraying box 31 also extends. The extension of the airbag bags 321 makes the distribution of the powder in the bags more uniform, helping to prevent the accumulation or caking of the powder. At the same time, the extended airbag bags 321 provide a larger space to accommodate more powder, increasing the amount of powder transported each time;

[0064] As the airbag 321 extends, the arc-shaped tube 324, which is fixedly connected to all the airbags 321, also extends. The reason for the extension of the arc-shaped tube 324 is that there are multiple telescopic grooves 3242 in the arc-shaped tube 324. When the airbag 321 extends, the distance between the telescopic grooves 3242 in the arc-shaped tube 324 starts to increase, thereby causing the arc-shaped tube 324 to extend. At the same time, the powder transmitted through the airbag 321 will be sprayed into the fiber filaments just extruded from the spinneret 13 (the fiber filaments just extruded from the spinneret 13 have a relatively high temperature) through the spray holes 3241 in the arc-shaped tube 324. Since the powder sprayed onto the fiber filaments at this time comes from the small metering balls 34, the powder sprayed onto the fiber filaments is limited. Therefore, the spraying assembly 32 above the spraying box 31 is responsible for the pretreatment of attaching powder to the fiber filaments. Since the surface of the hot fiber filaments is relatively soft, spraying powder can improve the adhesion between the powder and the fiber filaments. At the same time, because the spinneret 13 is in a rotating state during operation, as the length of the fiber filaments increases, the fiber filaments are prone to adhesion. Spraying a small amount of powder can form a protective layer on the surface of the fiber filaments, thereby preventing the fiber filaments from sticking during subsequent processing, and thus improving the effect of comprehensively spraying powder on the fiber filaments in the future. And the inclined plate 323 can limit the direction of the powder sprayed by the arc-shaped tube 324, so that the powder sprayed by the arc-shaped tube 324 can act more effectively on the fiber filaments.

[0065] Among them, after the spraying assembly 32 above the spraying box 31 completes the pretreatment of spraying powder on the fiber filaments just extruded (the fiber filaments at this time have a certain relatively high temperature), the fiber filaments enter the cooling assembly 37 in the spraying box 31, and the cooling assembly 37 can cool the fiber filaments. When the fiber filaments enter the area of the cooling assembly 37, the exhaust fan 310 starts to draw in the outside air into the cooling assembly 37. When the outside air enters the cooling assembly 37, it will first come into contact with the cooling tube 373 in the cooling assembly 37. The cooling tube 373 can cool the outside air (the cooling tube 373 cools the outside air by using the heat conduction effect), and the cooled outside air is discharged through the diversion groove 374 and the first square hole 372 in the installation box 371 respectively;

[0066] The outside air discharged from the first square hole 372 (the outside air hereafter is the cooled outside air), and the design of the first square hole 372 can help the outside air act more evenly on the air guiding assembly 38. The outside air discharged from the diversion groove 374 can achieve the diversion of the outside air, so that the outside air is more easily captured by the air flow bowl 384 in the air guiding assembly 38 (the function of the air flow bowl 384 capturing the outside air will be introduced later) and acts on the fiber filaments, achieving the cooling effect on the fiber filaments.

[0067] Among them, the outside air cooled by the cooling component 37 will undergo deceleration treatment through the air guiding component 38, so as to prevent the outside air from directly acting on the fiber filaments, which may cause the fiber filaments to shake greatly in the fixing box 21, increasing the risk of mutual adhesion between the fiber filaments. When the outside air acts on the air guiding component 38, the force receiving disc 383 will first block the outside air, converting part of the force of the outside air into the force for the rotation of the force receiving disc 383. Then, through the force receiving disc 383, the connecting rod 382 rotates in the spraying box 31. As the force receiving disc 383 rotates, the air flow bowl 384 captures the outside air discharged from the shunt groove 374 (the outside air discharged from the first square hole 372 mainly acts on promoting the rotation and cooling of the force receiving disc 383 and the connecting rod 382, thereby reducing the energy loss of the outside air discharged from the shunt groove 374). The air flow bowl 384 can collect the outside air discharged from the shunt groove 374 in the air flow bowl 384 and use the throwing force generated when the force receiving disc 383 rotates to throw the collected outside air into the fiber filaments. The design of the air flow bowl 384 can evenly distribute the outside air on the surface of the fiber filaments, providing more precise cooling, avoiding overheating and adhesion of the fiber filaments in the non-cooling area, and reducing the risk of local overheating.

[0068] Among them, the fiber filaments after cooling will pass through the spraying component 32 below the spraying box 31. The working process of the spraying component 32 below the spraying box 31 is the same as that of the spraying component 32 above. The metering ball 34 that provides powder to the airbag 321 below is a large metering ball 34. Therefore, more powder is transported to the spraying component 32 below than to the spraying component 32 above, and the spraying component 32 below is responsible for comprehensively spraying powder on the fiber filaments.

[0069] Step 2: As the flame retardant spraying mechanism 3 continuously sprays powder on the fiber filaments, the flame retardant recycling mechanism 4 is responsible for recycling the excess powder in the fiber filaments to the flame retardant storage mechanism 5. The flame retardant recycling mechanism 4 evenly disperses the suction force to the two absorption tubes 42 through the second telescopic tube 44. The absorption tubes 42 can complete the recycling of the powder that cannot adhere to the fiber filaments through the circular holes 421 and square grooves 422 opened on the surface.

[0070] Among them, the circular holes 421 contribute to the uniform distribution and flow of the powder. The edges of the circular holes are smooth, and the powder will not form obvious accumulation at the hole edges, reducing the risk of blockage. The circular hole design can often provide a stable flow rate and uniform adsorption effect when absorbing the powder.

[0071] The square groove 422 can provide a larger surface area for the retention and distribution of the powder. The right-angled edges of the square groove 422 help the powder to stay in the groove. The groove design helps to locate and manage the powder, reducing the scattering of powder outside the groove.

[0072] Among them, the first detector 43 in the flame retardant recovery mechanism 4 is responsible for detecting the flow rate and content of the powder entering the recovery box 41 (the first detector 43 is composed of a fan blade, a speed detector and a powder detector, wherein the speed detector is used to detect the speed of rotation of the fan blade when it is hit by the powder, and the powder detector is used to detect the content of the powder entering the recovery box 41), so as to judge the state of the powder sprayed by the flame retardant spraying mechanism 3, because the stability of the flow rate and content of the powder directly reflects the uniformity of the spraying. If the flow rate and content are consistent, it indicates that the spraying mechanism is working normally and the spraying effect is uniform. Unstable flow rate may indicate uneven spraying, and insufficient or excessive content may indicate inaccurate spraying amount, and the detection results are transmitted to the controller (the controller is a prior art, so it is not drawn in the figure. In addition, the conveyor belt assembly 11, spinneret 13, fixing mechanism and other components that need to be electrically driven are all controlled by the controller).

[0073] Step 3: The powder recovered in the flame retardant recovery mechanism 4 will enter the storage box 51 in the flame retardant storage mechanism 5 for storage, so as to achieve the recycling and reuse of the powder, and the storage box 51 is also provided with a feeding pipe 58, and the feeding pipe 58 can additionally replenish the storage box 51 with powder. When the powder enters the storage box 51, it will first enter the bottom of the storage box 51, and the interior of the storage box 51 is divided into an upper and lower part by a porous partition plate 55. At this time, the powder is stored in the lower part of the storage box 51, and a second detector 57 and a vortex fan 56 are provided in the lower part of the storage box 51 (the second detector 57 has the same structure as the first detector 43), and the second detector 57 is mainly used to detect the remaining content of the powder in the storage box 51, and the flow rate of the powder when the powder is adsorbed in the storage box 51, thereby forming a contrast with the first detector 43. , thereby determining whether the flame retardant spraying mechanism 3 and the flame retardant recovery mechanism 4 have fiber filaments blocking the flame retardant spraying mechanism 3 and the flame retardant recovery mechanism 4 during the spraying and recovery of powders, and the vortex fan 56 can rotate by utilizing the suction force generated when absorbing the powder in the storage box 51. As the vortex fan 56 rotates, the powder stored at the bottom of the storage box 51 will be stirred and pushed to redistribute the powder at the bottom of the box, thereby avoiding the accumulation of flame retardant powder at the bottom of the storage box 51, thereby affecting the flow effect of the flame retardant powder in the storage box 51, and the second detector 57 in the storage box 51 can detect the suction force of the power component 52 on the flame retardant powder in the storage box 51, thereby determining the spraying state of the spray component 32, and prompting through the indicator light 59, thereby reminding the staff to perform manual intervention.

[0074] Among them, when the fire retardant powder is absorbed by the porous partition plate 55 onto the upper part of the storage box 51, the crushing component 54 located in the upper part of the storage box 51 can recycle or supplement the fire retardant powder and perform a crushing function before spraying, so as to avoid caking of the fire retardant powder in the storage box 51, thereby affecting the spraying effect of the spraying component 32 on the fire retardant powder. The force receiving cone 542 in the crushing component 54 can convert the flowing force generated during the transmission of the fire retardant powder into the power for the rotation of the rotating column 541, thereby driving the crushing knife 543 to rotate. The rotating crushing knife 543 can crush the fire retardant powder, preventing the caked fire retardant powder from entering the spraying component 32, thereby causing blockage of the spraying component 32 and further affecting the subsequent spraying effect of the spraying component 32. The powder processed by the crushing component 54 will be transported to the first telescopic pipe 35 of the fire retardant spraying mechanism 3 through the powder suction pump 521, thus completing the process of supplementing the powder to the fire retardant spraying mechanism 3.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A spinning device for preparing flame-retardant fibers, comprising a base (1), a conveyor belt assembly (11) being arranged at the inner top of the base (1), a slide (12) being fixedly connected to the top of the base (1), a spinneret (13) being slidably connected to the bottom of the slide (12), and the spinneret (13) being fixedly connected to a spinneret for providing raw materials, characterized in that: Also includes: A fixing mechanism (2), the fixing mechanism (2) comprising a fixing box (21) slidably connected to the bottom of the slide (12), the spinneret (13) being located in the fixing box (21), a plurality of arc-shaped guide plates (22) being fixedly connected to two opposite inner walls of the fixing box (21), and a flame retardant spraying mechanism (3) for spraying flame retardant powder on the spinneret and a flame retardant recovery mechanism (4) for recovering excess flame retardant powder in the spinneret respectively being provided on the other two inner walls of the fixing box (21); The flame retardant spraying mechanism (3) comprises a spray box (31) fixedly connected to a side of the fixing mechanism (2); a pair of spray assemblies (32) for spraying flame retardant powder are symmetrically arranged in the middle of the spray box (31) in an upper and lower manner; an air guide assembly (38) for buffering the spraying airflow is arranged in the middle of the spray box (31) and on opposite sides of the pair of spray assemblies (32); and a cooling assembly (37) for providing cold air for cooling the spinneret is arranged on the inner wall corresponding to the air guide assembly (38) of the spray box (31); The spray assembly (32) comprises a plurality of airbag bags (321) which are arranged in a linear array along the length direction of the spray box (31) and are interconnected. A surface of each of the airbag bags (321) facing the fixed box (21) is symmetrically fixedly connected to a pair of inclined plates (323). The airbag bags (321) are located on opposite surfaces of the pair of inclined plates (323) and are fixedly connected to an arc tube (324). The arc surface of the arc tube (324) is arranged toward the fixed box (21). A plurality of spray holes (3241) and a plurality of telescopic grooves (3242) are alternately provided on the arc surface of the arc tube (324). Telescopic columns (3243) which are fixedly connected to the inner wall of the spray box (31) are fixedly connected to both sides of the arc tube (324). ), the air bag (321) near the inner wall of the spray box (31) is fixedly connected to a connecting block (322), the mutual surfaces of the connecting blocks (322) are fixedly connected to a connecting pipe (36), the outer wall of the spray box (31) is fixedly connected to a three-way valve (33), the two output ends of the three-way valve (33) are respectively fixedly connected to two metering balls (34) of different sizes through pipelines, the small metering ball (34) is fixedly connected to the upper air bag (321) in the spray box (31) through the pipeline, and the large metering ball (34) is fixedly connected to the lower air bag (321) in the spray box (31) through the pipeline, and the input end of the three-way valve (33) is fixedly connected to a first telescopic pipe (35).

2. A spinning device for preparing flame-retardant fibers according to claim 1, characterized in that: The cooling assembly (37) further comprises a cooling assembly (37), the cooling assembly (37) comprising a mounting box (371) fixedly connected to the inner wall of the spray box (31), a cooling pipe (373) fixedly connected inside the mounting box (371), a pair of first square holes (372) and a group of flow diversion grooves (374) symmetrically arranged in the upper and lower sides of a side of the mounting box (371) facing the air guide assembly (38), each pair of the first square holes (372) having a plurality of them arranged in a linear array on one side of the mounting box (371), and a group of the flow diversion grooves (374) having a plurality of them arranged in a linear array on one side of the mounting box (371).

3. A spinning device for preparing flame-retardant fibers according to claim 1, characterized in that: The air guide assembly (38) comprises a fixed column (381) rotatably connected to the inner walls of both sides of the spray box (31); the outer peripheral surface of the fixed column (381) has a plurality of groups of connecting rods (382) in a linear array; each group of the connecting rods (382) is annularly arrayed on the outer peripheral surface of the fixed column (381); one end of each connecting rod (382) away from the fixed column (381) is fixedly connected to a force plate (383) facing the spray box (31) in an inclined direction; and one side of the force plate (383) away from the fixed column (381) is fixedly connected to a plurality of airflow bowls (384); A spray box protection plate (39) and a pair of exhaust fans (310) corresponding to the positions of the cooling components (37) are respectively arranged on both sides of the spray box (31), and the spray box protection plate (39) faces the spray box (31). The side of the spray box protection plate (39) is provided with a plurality of groups of holes (391) corresponding to the spray components (32) and the air guide components (38).

4. A spinning device for preparing flame-retardant fibers according to claim 1, characterized in that: It also includes a flame retardant recovery mechanism (4), the flame retardant recovery mechanism (4) including a recovery box (41) fixedly connected to a side of the fixing mechanism (2), a pair of absorption tubes (42) for recovering flame retardant powder being symmetrically arranged in the middle of the recovery box (41) in the upper and lower parts, a first detector (43) for detecting the state of flame retardant powder recovery being arranged in the middle of the recovery box (41) and on the opposite side of the pair of absorption tubes (42), a recovery box protection plate (45) being fixedly connected to a side of the recovery box (41) facing the fixing box (21), and a plurality of square holes being provided in a rectangular array on the side of the recovery box protection plate (45); The outer circumferential surface of the absorption tube (42) is staggeredly provided with circular holes (421) and square grooves (422); a side of the recovery box (41) away from the fixed box (21) is fixedly connected to a confluence tube (46); the input ends of the confluence tube (46) respectively penetrate the recovery box (41) and are connected to a pair of absorption tubes (42); and the output end of the confluence tube (46) is fixedly connected to a second telescopic tube (44).

5. The spinning device for preparing flame-retardant fiber according to claim 1, characterized in that: The flame retardant storage mechanism (5) is also included, the flame retardant storage mechanism (5) comprising a storage box (51) fixedly connected to the side of the base (1), a power component (52) being arranged on the top of the storage box (51), and an air flow box (53), a plurality of crushing components (54) and a porous partition plate (55) being arranged on the inner wall of the storage box (51) in sequence from top to bottom; The power assembly (52) comprises a powder suction pump (521) fixedly connected to the top of the storage box (51); the output end and the input end of the powder suction pump (521) are respectively fixedly connected to an output pipe (522) and an input pipe (523); the end of the output pipe (522) away from the powder suction pump (521) is fixedly connected to the first telescopic pipe (35); the end of the input pipe (523) away from the powder suction pump (521) passes through the storage box (51) and is connected to the wind flow box (53); a rectangular array of multiple holes is formed on a surface of the wind flow box (53) facing the interior of the storage box (51), and a rotating fan (531) is rotatably connected to each hole.

6. A spinning device for preparing flame-retardant fibers according to claim 5, characterized in that: The crushing assembly (54) comprises a rotating column (541) rotatably connected to the inner wall of the storage box (51); a plurality of force cones (542) are fixedly connected in an annular array at both ends of the outer circumference of the rotating column (541); a plurality of groups of crushing knives (543) are fixedly connected in a linear array to the outer circumference of the rotating column (541); each group of crushing knives (543) is fixed in an annular array to the outer circumference of the rotating column (541).

7. A spinning device for preparing flame-retardant fibers according to claim 6, characterized in that: The inner bottom of the storage box (51) is rotatably connected to a plurality of vortex fans (56) and is provided with a second detector (57); opposite sides of the storage box (51) are respectively fixedly connected to a feeding pipe (58) and a recovery pipe (510); one end of the recovery pipe (510) away from the storage box (51) is fixedly connected to the second telescopic pipe (44); and an indicator light (59) is fixedly connected to the side of the storage box (51).

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