A double-layer vortex cooling air supply device for heat-proof and penetration-proof polyamide 6 yarn

Abstract

The utility model discloses a kind of yarn double-layer eddy current type cooling air supply devices of anti-permeation heat-shielding polyamide 6 in the spinning cooling technical field, including cooling box, cooling air duct and inner net cylinder, buffer dynamic pressure by cooling air duct outer layer, airflow is blocked by inner net cylinder, so that the air in it forms static pressure, on the basis of initial static pressure rapid cooling, the vertical direction cold air is additionally increased, the airflow provided by the device is more uniform, stable, soft static pressure airflow, and it is vertical direction air blowing, does not form interlaced with yarn, but air blowing along the direction of yarn, forms efficient cooling airflow, to effectively improve the quality and cooling effect of polyamide 6 fiber.

Description

Technical Field

[0001] This utility model relates to the field of spinning cooling technology, and in particular to a double-layer vortex cooling air supply device for insulating and heat-shielding polyamide 6 yarn. Background Technology

[0002] The raw materials for spinning are heated to a high temperature to form a molten state. Then, the molten raw materials are squeezed through the spinneret to form a high-temperature molten filament. The high-temperature filament needs to be cooled down quickly to solidify and form a uniform filament.

[0003] Common cooling methods include side blowing or ring blowing. However, the temperature of freshly sprayed silk is very high. Whether it is side blowing or ring blowing, the air is blown from the side of the silk to cool it down, and the airflow is perpendicular to the direction of the silk's movement.

[0004] Unilateral air blowing will result in inconsistent radial cooling rates of the filaments, uneven cooling, and differences in the internal structure of the fibers, affecting their mechanical properties and dyeing uniformity.

[0005] In particular, breathable and heat-blocking polyamide 6 is now used in many fields, especially in sun-protective clothing or clothing made of fine fabrics. However, the yarns of breathable and heat-blocking polyamide 6 are relatively thin and are easily affected by lateral shear forces. Even slightly strong airflow can cause abnormalities such as yarn breakage and clumping. Therefore, it is necessary to improve this yarn, with normal yarn spinning as the main consideration, and design the cooling effect of breathable and heat-blocking polyamide 6.

[0006] Lateral airflow creates shear force, resulting in poor airflow stability. Airflow from the air conditioning system blows directly onto the filaments, easily generating turbulence and disturbance, causing the filaments to sway within the channel, resulting in spinning vibration, increasing the breakage rate of spinning, and affecting production stability.

[0007] This illustrates the contradiction between cooling efficiency and airflow gentleness in the spinning industry. While increasing airflow speed can enhance cooling efficiency, excessive airflow impact can exacerbate yarn vibration; conversely, decreasing airflow speed can reduce disturbance, but may lead to insufficient cooling, affecting spinning speed.

[0008] Based on this, the present invention designs a double-layer vortex cooling and air supply device of impermeable and heat-shielding polyamide 6 filaments to solve the above problems. Utility Model Content

[0009] The purpose of this invention is to provide a double-layer vortex cooling air supply device for nylon 6 fibers that is breathable and heat-shielding. This device adds vertical cooling air to the initial static pressure rapid cooling. The device provides a more uniform, stable and gentle static pressure airflow through micro-pore ventilation. Moreover, the air is blown vertically and does not intersect with the fibers, but blows along the direction of the fibers to form a highly efficient cooling airflow, thereby effectively improving the quality and cooling effect of nylon 6 fibers.

[0010] This utility model is achieved as follows: a double-layer vortex cooling and air supply device for impermeable and heat-shielding polyamide 6 fibers, comprising: Cooling box, cooling air duct and inner mesh cylinder; The cooling box is a cooling box for spinning, and a side blowing device is provided at the top of the inner cavity of the cooling box; The cooling duct is a circular tube closed at both ends, and a base plate is provided at the outer end of the cooling duct. The cooling duct and the base plate form a closed circular tube. A cooling air duct is provided on each of the left and right sides of the cooling box, and the cooling air duct is located below the side blowing device. The outer end of the cooling duct is connected to the air inlet pipe, and the air inlet pipe is connected to the inner cavity of the cooling duct. The inner mesh cylinder is a cylindrical tube open at both ends, and the inner mesh cylinder is covered with ventilation mesh holes. The inner mesh cylinder is fitted onto the inner wall of the cooling duct without contact. Multiple baffles are provided on the outer wall of the inner mesh cylinder. The outer end of the inner mesh cylinder is fixedly connected to the bottom plate. The inner end of the inner mesh cylinder is fixedly connected to the inner wall of the cooling air duct through multiple baffles to form an integral structure. The cooling air duct and the inner end opening of the inner mesh cylinder are flush, and the inner end of the inner mesh cylinder penetrates the cooling air duct and communicates with the inner cavity of the cooling box.

[0011] Furthermore, the height difference between the cooling duct and the side-blowing device does not exceed 10cm.

[0012] Furthermore, the mesh openings of the inner mesh cylinder penetrate its sidewall, and the mesh opening diameter of the inner mesh cylinder is 0.5mm; The inner mesh cylinder coincides with the axis of the cooling air duct; The turbulence ribs are flat plate supports; multiple turbulence ribs are evenly spaced and arranged around the outer wall of the inner end of the inner mesh cylinder; Each of the aforementioned baffles is on the same plane as the diameter of the cooling duct.

[0013] Furthermore, the air inlet pipe is installed on the outer wall of the cooling duct, and the air inlet of the air inlet pipe coincides with the tangent of the side wall of the cooling duct.

[0014] The beneficial effects of this utility model are: 1. This device adds a set-top air supply structure of cooling air duct and inner mesh cylinder. The cold airflow will only blow towards the inner mesh cylinder in a tangential direction. The inner mesh cylinder will block the airflow, so that the airflow not only has the power to penetrate into the cooling box, but also has the direction of vertical blowing. This effectively changes the traditional unilateral blowing to a vertically penetrating, enveloping, uniform flow, effectively changing the transverse shear force on the yarn, thereby making the static pressure shape of the cooling airflow better. 2. Because the airflow of this device forms a vertical airflow and can also slowly move laterally into the cooling box, it forms a continuous and slowly advancing vertical airflow. The vertical inclined wind, through the micro-holes surrounding the side wall, can blow air directly downward or upward, which will basically make the temperature areas of the inner and outer layers and the upper and lower positions of the yarn similar, effectively alleviating or eliminating the radial temperature difference of the yarn and avoiding the situation of only external cooling. 3. After the static pressure chamber is equalized, the air velocity at the micro-hole outlet can be increased independently without increasing turbulence, achieving a high air volume and low disturbance cooling effect. This creates a uniform low-temperature cooling environment throughout the entire cooling chamber, resulting in a significant cooling effect without increasing airflow. The cold air ejected by this device is a ring-shaped vortex, which can also turbulent the transverse airflow, thus improving the effect of transverse airflow on the filaments and significantly enhancing the uniformity of filament cooling. The mechanical properties of the fiber and the uniformity of dyeing are improved simultaneously. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model; Figure 2 This is a front structural diagram of the cooling duct and inner mesh cylinder of this utility model in their assembled state; Figure 3 This is a schematic diagram of the cooling duct and inner mesh cylinder structure of this utility model; Figure 4 This is a schematic diagram of the installation structure of the inner mesh cylinder and the bottom plate of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1-Cooling box, 11-Side blowing device, 2-Cooling air duct, 21-Air inlet pipe, 22-Base plate, 3-Inner mesh cylinder, 31-Break ribs. Detailed Implementation

[0018] Please see Figures 1 to 4 As shown, this utility model provides a double-layer vortex cooling and air supply device for impermeable and heat-shielding polyamide 6 filaments. In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In a specific embodiment of the technical solution of this utility model: Includes a cooling box 1, a cooling air duct 2, and an inner mesh cylinder 3; Cooling box 1 is a cooling box for spinning. A side blowing device 11 is installed at the top of the inner cavity of cooling box 1. The side blowing device 11 is the first cooling device for the yarn. The molten raw material is formed into yarn through the spinneret and then passes through the cooling channel of the side blowing device 11. It is still at a high temperature. Therefore, it is necessary to keep the temperature inside cooling box 1 low and continuously cool the downward yarn. The cooling duct 2 is a circular tube closed at both ends. A base plate 22 is provided at the outer end of the cooling duct 2. The cooling duct 2 and the base plate 22 form a circular tube closed at one end. The inner end of the cooling duct 2 extends into the inner cavity of the cooling box 1 and is closed. A cooling duct 2 is set on each of the left and right sides of the cooling box 1, and the cooling duct 2 is set below the side blowing device 11. The height difference between the cooling duct 2 and the side blowing device 11 is no more than 10cm, forming a cooling method that is intertwined with each other, and also forming a mutual turbulence effect to avoid excessive horizontal airflow from affecting the abnormality of the filament. The outer end of the cooling duct 2 is connected to the air inlet pipe 21, which is connected to the inner cavity of the cooling duct 2. The air inlet pipe 21 is set on the outer wall of the cooling duct 2, and the air inlet of the air inlet pipe 21 coincides with the tangent of the side wall of the cooling duct 2. This allows the cold air blown in from the outside to flow inward along the arc of the inner wall of the cooling duct 2. When the cavity pressure between the inner mesh cylinder 3 and the cooling duct 2 is large, the airflow will enter the inner mesh cylinder 3 through the mesh holes and continuously rotate inward to enter the cooling box 1. The airflow flowing on the outer layer of the inner mesh cylinder 3 will also be blocked by the baffle rib 31. Because the baffle rib 31 is on the same plane as the diameter of the inner mesh cylinder 3, the annular vortex-shaped airflow will be blocked by the baffle rib 31, and more of it will enter its interior.

[0020] The inner mesh cylinder 3 is a cylindrical tube open at both ends. The inner mesh cylinder 3 is covered with ventilation mesh holes. The mesh holes of the inner mesh cylinder 3 penetrate its side wall. The diameter of the mesh holes of the inner mesh cylinder 3 is 0.5mm. The inner mesh cylinder 3 and the cooling air duct 2 have their axes aligned; The turbulence rib 31 is a flat plate support; multiple turbulence ribs 31 are evenly spaced and arranged around the outer wall of the inner end of the inner mesh cylinder 3; Each baffle 31 is on the same plane as the diameter of the cooling duct 2. Multiple baffle 31 form multiple annular vortex-shaped baffle ducts between the cooling duct 2 and the inner mesh cylinder 3, and the formed baffle ducts are set horizontally in the inward and outward directions.

[0021] The inner mesh cylinder 3 is non-contactly sleeved on the inner wall of the cooling duct 2. The airflow passes through the mesh to form micro-pore turbulence, thereby converting the vortex-like dynamic pressure into gentle static pressure. The air velocity at the micro-pore outlet can be increased without increasing the turbulence, and the traditional horizontal blowing is changed to a vertically penetrating, wrap-around uniform flow, effectively eliminating radial temperature difference. Multiple baffles 31 are provided on the outer wall of the inner mesh cylinder 3. The outer end of the inner mesh cylinder 3 is fixedly connected to the bottom plate 22. The inner end of the inner mesh cylinder 3 is fixedly connected to the inner wall of the cooling air duct 2 through multiple baffles 31 to form an integral structure. The inner openings of the cooling duct 2 and the inner mesh cylinder 3 are flush. The inner end of the inner mesh cylinder 3 extends horizontally into the inner cavity of the cooling box 1. The inner end of the inner mesh cylinder 3 penetrates the cooling duct 2 and connects with the inner cavity of the cooling box 1. In other words, both ends of the interlayer between the cooling duct 2 and the inner mesh cylinder 3 are sealed, forcing the airflow to pass through the mesh of the inner mesh cylinder 3 and enter the pipe inside the inner cavity of the inner mesh cylinder 3 before entering the cooling box 1. This creates airflow obstruction and forms static pressure and vertical airflow.

[0022] It should be noted that during the spinning process of heat-blocking and breathable polyamide 6, the cooling requirements of heat-blocking and breathable polyamide 6 are different from those of conventional yarns. Heat-blocking and breathable polyamide 6 has a larger number of spinnerets, more concentrated heat, and finer yarns, resulting in uneven heat dissipation. However, the fineness of each yarn makes it easy for the internal heat of the heat-blocking and breathable polyamide 6 yarn to dissipate. Therefore, faster heat exchange is sufficient to achieve the purpose of cooling the heat-blocking and breathable polyamide 6.

[0023] Therefore, during the spinning process of heat-blocking and breathable polyamide 6, it is necessary to rapidly cool the high-temperature filaments, which requires rapid airflow to carry away the high-temperature heat emanating from the vicinity of the filaments, while simultaneously maintaining stable airflow to avoid disturbing the filaments and ensure their uniformity. This is inherently a contradictory situation. Current spinning devices strive to balance cooling and airflow, but this contradiction remains irreconcilable. This device addresses this issue by allowing airflow to agitate the filaments, but the airflow direction is along the filament's direction of travel. The lateral disturbance to the filaments is minimal, while the filaments themselves create penetrating turbulence in the vertical airflow. Therefore, the vertical airflow does not affect the filament's evenness. Furthermore, the airflow from this device does not increase lateral turbulence, resulting in slow airflow and fast vertical flow. Thus, while achieving efficient cooling, this device also maintains lateral static pressure, optimizing both cooling and static pressure in the spinning process. This satisfies both rapid cooling and stable static pressure.

[0024] When using this utility model, the air inlet pipes 21 on both sides of the cooling box 1 are first activated, so that the airflow enters the cooling box 1 in advance, displaces and cools the cavity inside the cooling box 1, and at the same time forms a stable wind pressure and generates a static pressure state.

[0025] Then the spinning operation is carried out. The yarn enters the cooling box 1 and is first cooled quickly by the side blowing device 11, which blows air and absorbs the individual smoke. The smoke is then removed. After that, the yarn no longer emits a large amount of smoke, but enters a semi-solid state and enters the cooling and forming state.

[0026] At this time, the yarn needs a more stable static pressure cooling space. The yarn also moves downward and enters the coverage area of ​​the cooling duct 2. The airflow inside the cooling duct 2 enters the inner cavity of the inner mesh cylinder 3 along the mesh holes, and enters the cooling box 1 from the inner end of the inner mesh cylinder 3, thereby forming a vertical airflow. This not only turbulents the horizontal airflow of the side blowing device 11 and reduces its horizontal wind, but also forms a vertical wind to quickly cool the yarn. Its horizontal movement speed is very small, thus effectively avoiding the yarn being affected by the horizontal airflow, thereby improving the uniformity of the yarn.

[0027] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A double-layer vortex cooling and air supply device for impermeable and heat-shielding polyamide 6 fibers, characterized in that, include: Cooling box (1), cooling air duct (2) and inner mesh cylinder (3); The cooling box (1) is a cooling box for spinning, and a side blowing device (11) is provided at the top of the inner cavity of the cooling box (1). The cooling duct (2) is a circular tube closed at both ends. A base plate (22) is provided at the outer end of the cooling duct (2). The cooling duct (2) and the base plate (22) form a closed circular tube. A cooling duct (2) is provided on each of the left and right sides of the cooling box (1), and the cooling duct (2) is located below the side blowing device (11); The outer end of the cooling duct (2) is connected to the air inlet pipe (21), and the air inlet pipe (21) is connected to the inner cavity of the cooling duct (2); The inner mesh cylinder (3) is a cylindrical tube with openings at both ends. The inner mesh cylinder (3) is covered with ventilation mesh holes. The inner mesh cylinder (3) is fitted onto the inner wall of the cooling duct (2) without contact. Multiple turbulence ribs (31) are provided on the outer wall of the inner mesh cylinder (3). The outer end of the inner mesh cylinder (3) is fixedly connected to the bottom plate (22). The inner end of the inner mesh cylinder (3) is fixedly connected to the inner wall of the cooling duct (2) through multiple turbulence ribs (31) to form an integral structure. The cooling duct (2) and the inner end opening of the inner mesh cylinder (3) are flush, and the inner end of the inner mesh cylinder (3) penetrates the cooling duct (2) and communicates with the inner cavity of the cooling box (1).

2. The double-layer vortex cooling and air supply device for impermeable and heat-shielding polyamide 6 fibers according to claim 1, characterized in that: The height difference between the cooling duct (2) and the side blowing device (11) shall not exceed 10cm.

3. The double-layer vortex cooling and air supply device of heat-shielding and breathable polyamide 6 filaments according to claim 1, characterized in that: The mesh openings of the inner mesh cylinder (3) penetrate its sidewall, and the mesh opening diameter of the inner mesh cylinder (3) is 0.5 mm; The inner mesh cylinder (3) coincides with the axis of the cooling air duct (2); The turbulence rib (31) is a flat support; multiple turbulence ribs (31) are evenly spaced and arranged around the outer wall of the inner end of the inner mesh cylinder (3); Each of the aforementioned bleed ribs (31) is on the same plane as the diameter of the cooling duct (2).

4. The double-layer vortex cooling and air supply device for impermeable and heat-shielding polyamide 6 fibers according to claim 1, characterized in that: The air inlet pipe (21) is installed on the outer wall of the cooling air duct (2), and the air inlet of the air inlet pipe (21) coincides with the tangent of the side wall of the cooling air duct (2).

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