Special double-cooling spinning silk chamber structure for melt spinning thick dpf FDY (fully drawn yarn)

Abstract

The invention discloses a special double-cooling spinning yarn chamber structure for FDY (fully drawn yarn) of melt spinning thick dpf (dpf), which comprises a yarn chamber base, a side air blowing rectification area arranged on the yarn chamber base and a channel arranged at the lower end of the side air blowing rectification area, the side air blowing rectification area comprises a first side air blowing device and a second side air blowing device which are mutually stacked, two air inlet channels with adjusting valves are formed in the yarn chamber base through a partition plate, the channel is shortened to form a space used for installing the second side blowing device, the top of the channel is installed at a lower end discharging port of the second side blowing device, and part of the second side blowing device penetrates through a floor slab of an upper-layer space to be installed and a floor slab of a lower-layer space to be installed. According to the utility model, the fully cooling effect can be achieved after the FDY of the thick dpf variety is cooled by cross air blowing, and each FDY monofilament fiber can be uniformly cooled.

Description

Technical Field

[0001] The present invention relates to the technical field of spinning cooling, and particularly relates to a special double-cooling spinning chamber structure for FDY with thick dpf in melt spinning. Background Art

[0002] Generally, after the melt passes through the spinneret plate, it is cooled by side blowing or ring blowing to form a filament bundle, and then wound into shape. At present, the side-blowing cooling spinning chamber generally includes a windless area, a side-blowing rectifying area, and a duct from top to bottom. The windless area and the side-blowing rectifying area are generally installed on the side of the frame on the spinning floor, while the duct passes through the floor slab and is installed at the bottom of the frame. When producing conventional FDY varieties, such as when the single filament fineness is in the range of 1.5≤dpf≤5, such as 100D / 36F or 150D / 48F, due to the relatively fine single filament fineness, the front of the side-blowing rectifying area in the existing spinning chamber is generally an open structure, which can communicate with the outside to ensure the cooling effect and is also convenient for operators to observe the filament formation of the filament bundle. When producing FDY filaments with a high single filament fineness variety, such as FDY products with a single filament fineness greater than 5.0, such as 200D / 10F, 300D / 10F, etc., due to the increase and thickening of the single filament fiber, when the existing side-blowing rectifying area cools and reduces the temperature of the FDY filament bundle, the filament bundle will be cooled unevenly or the surface will be cold but the middle of the filament will not be cooled through. Especially for FDY varieties with a relatively thick single filament fineness, the outer fibers cannot be fully cooled or the outer fibers are cooled but the middle of the fiber is not cooled, resulting in uneven fiber elongation or the rubber band phenomenon of the fiber, causing the FDY to have a bull tendon phenomenon, uneven strip dryness, and horizontal stripes and unevenness on the surface of the subsequent dyed fabric, seriously affecting the quality of the product. Summary of the Invention

[0003] In order to solve certain or some technical problems existing in the prior art, the purpose of the present application is to provide a special double-cooling spinning chamber structure for FDY with thick dpf in melt spinning, which can enable the FDY filaments of the thick dpf variety to also achieve a sufficient cooling effect after side-blowing cooling, and ensure that each FDY single filament fiber can be evenly cooled.

[0004] To solve the above-mentioned existing technical problems, the purpose of the present application is achieved by adopting the following technical solutions:

[0005] A special double-cooling spinning chamber structure for melt-spun high dpf FDY, comprising a chamber base, a side-blowing rectification area provided on the chamber base, and a duct provided at the lower end of the side-blowing rectification area. The side-blowing rectification area includes a first side-blowing device and a second side-blowing device stacked on each other. Two air inlet channels with regulating valves are formed in the chamber base through partitions. After the duct is shortened, a space for installing the second side-blowing device is formed. The top of the duct is installed at the lower discharge port of the second side-blowing device. Part of the second side-blowing device penetrates the floor slab of the upper and lower spaces to be installed.

[0006] Preferably, the first side-blowing device includes a first housing, a first rectification screen provided in the first housing, and a first outer cover provided on the back of the first housing. The back of the first outer cover is inclined. A triangular first air inlet space is formed between the first outer cover and the first rectification screen. A first box door that can be opened and closed is provided on the front side of the first housing. A cooling space is formed between the first box door and the first rectification screen. A heat preservation board is provided at the top of the cooling space.

[0007] Preferably, the first outer cover and the first housing are detachably connected. A second box door is provided on the first outer cover. The first rectification screen is disassembled and replaced through the second box door.

[0008] Preferably, the second side-blowing device includes a second housing, a second rectification screen provided in the second housing, and a second outer cover provided on the back of the second housing. A flow dividing plate is inclined on the back of the second outer cover. The back plate of the second outer cover and the flow dividing plate form a two-end open air supply channel. The two ends of the air supply channel are respectively communicated with the lower end of the first air inlet space and one of the air inlet channels with a regulating valve; a triangular second air inlet space is formed between the second outer cover and the second rectification screen. The lower end of the second air inlet space is communicated with the other air inlet channel with a regulating valve; a third box door that can be opened and closed is provided on the front side of the second housing. A cooling space is formed between the third box door and the second rectification screen. The second rectification screen is disassembled and assembled through the third box door for replacement.

[0009] Preferably, the flow dividing plate is parallel to the back plate of the second outer cover.

[0010] Preferably, oil rack moving grooves penetrating the first housing and the second housing are provided on both sides of the cooling space.

[0011] Preferably, an installation rack is provided on the outside of the second side-blowing device.

[0012] Preferably, a method for cooling FDY filaments by using the special double-cooling spinning chamber structure for melt-spun FDY includes:

[0013] S1. Fabricate a first side air blowing device according to the height of the side air blowing rectifying area of the existing equipment;

[0014] S2. Shorten the length of the duct, and connect the shortened space through the second side air blowing device to lengthen the air outlet length of the side air blowing rectifying area;

[0015] S3. Install the nozzle assembly and the wire guide hook assembly onto the oil rack moving groove and adjust them to the required positions;

[0016] S4. By adjusting the air inlet flow rates of the first side air blowing device and the second side air blowing device, cool FDY monofilaments of different thicknesses.

[0017] Preferably, the method for controlling the air inlet flow rates of the first side air blowing device and the second side air blowing device includes: adjusting the regulating valves in the two air inlet channels based on different FDY varieties produced. The ways of adjusting the air inlet amounts of the two side air blowing devices include:

[0018] A1. When producing FDY monofilaments with a fineness less than 5 dpf, close the regulating valve in the air inlet channel communicating with the second side air blowing device; open the regulating valve in the air inlet channel communicating with the first side air blowing device, and cool the FDY monofilaments by controlling the air inlet flow rate of the first side air blowing device;

[0019] A2. When producing FDY thickened monofilaments with a fineness greater than 5 dpf, open the regulating valve in the air inlet channel communicating with the first side air blowing device, and simultaneously open the regulating valve in the air inlet channel communicating with the second side air blowing device; cool the FDY thickened monofilaments by controlling the air inlet flow rates of the first side air blowing device and the second side air blowing device.

[0020] Preferably, when cooling FDY through the first side air blowing device and the second side air blowing device, the first cabinet door and the third cabinet door are closed, and the cooling air flows downward through the duct and is discharged.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] When it is necessary to cool and shape FDY products of varieties with a single filament fineness greater than 5.0 dpf, the cooling and shaping time and temperature can be better guaranteed. Thus, after the single filament fibers are increased in size, the side blowing rectification area can also cool down the FDY tow, preventing the tow from experiencing uneven cooling or the situation where the surface is cold but the middle of the filament is not thoroughly cooled. It can effectively solve the problems of uneven fiber elongation or the appearance of rubber band phenomena in the fiber caused by insufficient cooling. When the side blowing cooling spinning silk chamber produces FDY silk, whether it is producing FDY products of varieties with a single filament fineness less than 5.0 or greater than 5.0, it can effectively cool down, ensuring that the subsequent dyed fabric surface does not have problems such as uneven horizontal stripes and guaranteeing the quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Side view of the combined structure of the present invention;

[0024] Figure 2 Exploded view of the first side blowing device in the present invention;

[0025] Figure 3 Exploded view of the second side blowing device in the present invention;

[0026] In the figure: 1, duct; 2, silk chamber base; 3, oil rack moving groove; 4, second side blowing device; 5, side blowing rectification area; 6, first side blowing device; 61, cooling space; 62, second box door; 63, first air inlet space; 64, first box door; 65, heat preservation board; 66, first housing; 67, first rectification sieve; 68, first outer cover; 7, mounting rack; 8, floor slab; 9, partition board; 10, regulating valve; 11, air inlet channel; 41, air supply channel; 42, second air inlet space; 43, second rectification sieve; 44, third box door; 45, second housing; 46, flow dividing plate; 47, second outer cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, in combination with the drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0028] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0029] The terms "first", "second", etc. in this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0030] As Figure 1 shown, a special double-cooling spinning silk chamber structure for melt-spun high-dpf FDY includes a silk chamber base 2, a side-blowing rectifying area 5 provided on the silk chamber base 2, and a duct 1 provided at the lower end of the side-blowing rectifying area 5. The side-blowing rectifying area 5 includes a first side-blowing device 6 and a second side-blowing device 4 stacked on each other. Two air inlet channels 11 with regulating valves 10 are formed in the silk chamber base 2 through a partition 9. The duct 1 is shortened to form a space for installing the second side-blowing device 4. The top of the duct 1 is installed at the lower discharge port of the second side-blowing device 4. Part of the second side-blowing device 4 penetrates through the floor slab 8 of the upper and lower layers to be installed.

[0031] When the existing side-blowing cooling spinning silk chamber cools down FDY products with a single-filament fineness greater than 5.0 dpf, such as 200D / 10F and 300D / 10F, due to the increase in the thickness of the single-filament fiber, the uneven cooling of the filament bundle or the situation where the surface is cold but the middle of the filament is not thoroughly cooled may occur. Especially for FDY varieties with a relatively thick single-filament fineness, the outer fibers cannot be sufficiently cooled, or the outer fibers are cooled while the middle of the fiber is not cooled, resulting in uneven fiber elongation or the rubber band phenomenon of the fiber, causing the bull tendon phenomenon in FDY, uneven yarn evenness, and horizontal stripes and unevenness on the surface of the subsequent dyed fabric, seriously affecting the quality of the product. To solve these problems, the existing side-blowing cooling spinning silk chamber is redesigned. Among them, based on the existing side-blowing cooling spinning silk chamber or the space where the side-blowing cooling spinning silk chamber can be placed, a first side-blowing device 6 with the same wind speed is formed according to the existing side-blowing structure. And the duct 1 itself is mainly used to form an annular channel, only facilitating the filament bundle to pass through the upper and lower floors 8. Therefore, the existing duct 1 is improved by shortening the height of the feeding end, so that a space for installing the second side-blowing device 4 is formed after the duct 1 is shortened. Then, the improved first side-blowing device 6 and the second side-blowing device 4 are stacked and installed between the windless area and the entrance of the duct 1. Two air inlet channels 11 with regulating valves 10 are formed in the silk chamber base 2 through partitions 9, and the air inlet volumes of the first side-blowing device 6 and the second side-blowing device 4 can be controlled respectively through the two air inlet channels 11 with regulating valves 10. Among them, since the height and power of the first side-blowing device 6 remain unchanged, when producing conventional FDY varieties, those with a relatively thin single-filament fineness can directly start only the first side-blowing device 6 to achieve cooling and shaping; while the second side-blowing device 4 serves as an extension section of the side-blowing. When it is necessary to cool and shape FDY products with a single-filament fineness greater than 5.0 dpf, after controlling the wind speed of the second side-blowing device 4, the cooling and shaping time and temperature can be better guaranteed. Thus, after the single-filament fiber increases and thickens, the side-blowing rectifying area 5 can also cool down the FDY filament bundle, and the situation where the filament bundle is unevenly cooled or the surface is cold but the middle of the filament is not thoroughly cooled will not occur again. It can effectively solve the problem that the filament bundle causes uneven fiber elongation or the rubber band phenomenon of the fiber due to insufficient cooling, enabling the side-blowing cooling spinning silk chamber to effectively cool down when producing FDY filaments, whether it is producing FDY products with a single-filament fineness less than 5.0 or greater than 5.0, ensuring that there are no problems such as horizontal stripes and unevenness on the surface of the subsequent dyed fabric and guaranteeing the quality of the final product.

[0032] Further improvement is made as follows Figure 2As shown, the first side air blowing device 6 includes a first housing 66, a first rectifying screen 67 disposed within the first housing 66, and a first outer cover 68 disposed on the back of the first housing 66. The back of the first outer cover 68 is inclined. A triangular first air inlet space 63 is formed between the first outer cover 68 and the first rectifying screen 67. A first box door 64 that can be opened and closed is provided on the front side of the first housing 66. A cooling space 61 is formed between the first box door 64 and the first rectifying screen 67. A heat preservation plate 65 is provided at the top of the cooling space 61.

[0033] The corresponding positions of the air inlet spaces in the existing side air blowing devices are generally rectangular or trapezoidal structures, and many air inlets still use circular outlets. Although normal air supply can be achieved, during the process of filling the air inlet space, it is necessary to first disperse and fill it, and then discharge it towards the rectifying sieve. The range of mutual blockage of the air in the air inlet space is large, resulting in relatively large loss of the required air volume. Therefore, the overall structure of the first side air blowing device 6 is improved. Among them, the back of the first outer cover 68 is inclined, so that a triangular first air inlet space 63 is directly formed between the first outer cover 68 and the first rectifying sieve 67 when viewed from the side direction. When the cooling air in the air duct is blown upward from the bottom of the first air inlet space 63, the upward flowing air can be quickly redirected through the inclined back of the first outer cover 68, so that the cooling air can be redirected more quickly from blowing upward to blowing horizontally. At the same time, the entire bottom of the first air inlet space 63 is an air inlet, which can make the entering air quickly and evenly fill the entire first air inlet space 63, make the air passing through the first rectifying sieve 67 more uniform, have a shorter residence time in the first air inlet space 63, and less loss. At the same time, when producing FDY yarns with high denier per filament, such as FDY products with a denier per filament greater than 5.0, such as 200D / 10F, 300D / 10F, etc., due to the increase in the thickness of the single filament fiber, when the existing side air blowing rectifying area 5 cools and cools the FDY yarn bundle, the yarn bundle will be cooled unevenly or the surface will be cold but the middle of the yarn will not be cooled through. Especially for FDY varieties with a relatively thick denier per filament, the outer fibers cannot be fully cooled or the outer fibers are cooled but the middle of the fiber is not cooled, resulting in uneven fiber elongation or the rubber band phenomenon of the fiber, causing the FDY to have the bull tendon phenomenon, uneven yarn evenness, and uneven horizontal stripes on the surface of the subsequent dyed fabric, seriously affecting the product quality. Therefore, two openable first box doors 64 are installed on the front side of the first housing 66. During the cooling process of the thick yarn FDY product, a closed cooling space 61 can be formed by closing the first box doors 64. When the air blows from the first air inlet space 63 towards the first rectifying sieve 67, after being guided by the inclined back, a horizontal and slightly downward inclined wind direction is formed. The slightly downward inclined cooling air can effectively cool the outer side of the thick yarn FDY product after hitting the first box door 64 and rebounding, and the air rebounding after being blocked by the first box door 64 will also flow downward, and finally flow out along the outlet direction of the aisle 1. By adding the first box doors 64, not only the outlet direction of the cooling air is changed, but also the cooling effect in the entire spinning and winding room is improved, and at the same time, the working environment temperature of the workshop where the first side air blowing device 6 is installed is reduced.

[0034] Further improved, the inclination angle between the inclined surface of the first air inlet space 63 and the first rectifying sieve 67 is 5 - 8°.

[0035] The inclination angle of the inclined surface of the first air inlet space 63 relative to the first rectifying sieve 67 is 5-8°. When the wind direction blows outwards, it can blow out with the minimum inclination degree and ensure that the wind direction is close to horizontal after blowing out. At the same time, it can also make the overall thickness interval of the first air inlet space 63 smaller, so that the incoming cooling air can blow towards the tow more quickly and directly, avoiding excessive residence and also avoiding the problem of excessive inclination of the blown air due to too large an inclination angle.

[0036] Furthermore, it is improved that the first outer cover 68 and the first housing 66 are detachably connected. A second box door 62 is provided on the first outer cover 68, and the first rectifying sieve 67 is disassembled and replaced through the second box door 62.

[0037] Among them, the first outer cover 68 and the first housing 66 are detachably connected. During assembly, the relative positions of the first outer cover 68 and the first housing 66 can be flexibly installed. When the installation of the first housing 66 is completed and the lower port of the first outer cover 68 cannot be perfectly docked with the golden phoenix channel, it can be adjusted by adding gaskets with different thicknesses between the two, so that the accuracy of the entire equipment after installation is higher. Moreover, a sealed second box door 62 is installed on the back of the first outer cover 68. When the first rectifying sieve 67 needs to be replaced or cleaned, it can be disassembled and replaced by opening the second box door 62, so that the disassembly, installation and replacement of the first rectifying sieve 67 are more simple and fast, and can be operated online, which will not affect the flow of the tow and does not require the disassembly of the oiling nozzle or the wire guide.

[0038] Furthermore, it is improved as Figure 3 shown, the second side blowing device 4 includes a second housing 45, a second rectifying sieve 43 arranged in the second housing 45, and a second outer cover 47 arranged on the back of the second housing 45. A flow dividing plate 46 is inclinedly arranged on the back of the second outer cover 47. The back plate of the second outer cover 47 and the flow dividing plate 46 form a ventilation channel 41 with openings at both ends. The two ends of the ventilation channel 41 are respectively communicated with the lower end of the first air inlet space 63 and one of the air inlet channels 11 with a regulating valve 10; a triangular second air inlet space 42 is formed between the second outer cover 47 and the second rectifying sieve 43, and the lower end of the second air inlet space 42 is communicated with the other air inlet channel 11 with a regulating valve 10; a third box door 44 that can be opened and closed is provided on the front side of the second housing 45. A cooling space 61 is formed between the third box door 44 and the second rectifying sieve 43, and the second rectifying sieve 43 is disassembled and replaced from the third box door 44.

[0039] The second side air blowing device 4 as a whole is composed of a second housing 45, a second rectifying sieve 43, and a second outer cover 47. Among them, a flow dividing plate 46 is inclined and installed inside the second outer cover 47, so that a air supply channel 41 with both ends open is formed between the back plate of the second outer cover 47 and the flow dividing plate 46. The two ends of the air supply channel 41 are respectively communicated with the lower end of the first air inlet space 63 and one of the air inlet channels 11 with a regulating valve 10; it can make the air in the air inlet channel 11 directly flow through the inside of the second side air blowing device 4 and into the first side air blowing device 6, so that the two regulating valves 10 on the air inlet channel 11 can be set at the same position, which is convenient for control. When transporting the air in the air supply channel 41 to the first side air blowing device 6, there is no need to additionally increase the pipeline structure, the overall structure is simpler, the volume is smaller, and at the same time, the stability is higher after installation. A triangular second air inlet space 42 is formed between the second outer cover 47 and the second rectifying sieve 43, and the lower end of the second air inlet space 42 is communicated with another air inlet channel 11 with a regulating valve 10; the structure of the second air inlet space 42 is similar to that of the first air inlet space 63, so it can also achieve the effect of the first air inlet space 63. When the whole second side air blowing device 4 is installed, the stability is better. Due to the addition of the second side air blowing device 4, the cooling space 61 can be effectively increased, thus effectively solving the problem of insufficient cooling during the production of thick filament FDY products. And through the third box door 44 that can be opened and closed on the front side of the second housing 45, the second rectifying sieve 43 can also be disassembled and replaced, thus solving the problem that the second rectifying sieve 43 is inconvenient to disassemble after direct installation.

[0040] Further improved, the flow dividing plate 46 is arranged parallel to the back plate of the second outer cover 47.

[0041] The flow dividing plate 46 is arranged parallel to the back plate of the second outer cover 47, which not only ensures the overall smooth air inlet of the air supply channel 41, but also ensures the flow guiding effect of the second air inlet space 42, and the overall structure is simple.

[0042] Further improved, oil rack moving grooves 3 penetrating through the first housing 66 and the second housing 45 are provided on both sides of the cooling space 61.

[0043] The oil rack moving grooves 3 are installed on both sides of the first housing 66 and the second housing 45. Through the oil rack moving grooves 3, it is convenient to adjust the height position of the oil nozzle, and it is also convenient to install and adjust the height position of the wire guide.

[0044] Further improved, an installation rack 7 is provided on the outside of the second side air blowing device 4.

[0045] In order to prevent the entire spinning silk chamber from falling due to the increased weight when installed in the factory building, a mounting bracket 7 is added outside the second side air blowing device 4. After connecting the mounting bracket 7 to the floor slab 8, the situation of insecure installation can be effectively avoided.

[0046] Furthermore, the improvement is that the method for cooling FDY filaments by the special double-cooling spinning silk chamber structure for melt-spun FDY includes:

[0047] S1. Fabricate the first side air blowing device 6 according to the height of the side air blowing rectifying area 5 of the existing equipment;

[0048] S2. Shorten the length of the duct 1, and connect the shortened space through the second side air blowing device 4 to lengthen the air outlet length of the side air blowing rectifying area 5;

[0049] S3. Install the oil nozzle assembly and the wire guiding hook assembly on the oil rack moving groove 3 and adjust them to the required positions;

[0050] S4. Adjust the air inlet flow rates of the first side air blowing device 6 and the second side air blowing device 4 to cool FDY single filaments of different thicknesses; when cooling FDY by the first side air blowing device 6 and the second side air blowing device 4, the first box door 64 and the third box door 44 are closed, and the cooling air flows downward through the duct 1 and is discharged.

[0051] By adjusting the air volume regulating valves 10 of the first-side water-air device and the second-side water-air device, cooling air with different process requirements can be provided for FDY fibers with different dpf values. For example, when producing FDY fibers with a single-filament fineness in the range of 1.5 ≤ dpf ≤ 5, such as 100D / 36F or 150D / 48F, since the single-filament fineness is relatively fine, only the first-side water-air device needs to be turned on, or the wind speed of the first-side water-air device can be appropriately reduced, and at the same time, the second-side water-air device can be appropriately turned on to achieve effective cooling and shaping. This can make the required air intake smaller, and even when a single first-side water-air device is supplying air, the air supply requirement can be reduced by closing the box door; when producing FDY filaments with a high single-filament fineness variety, such as FDY products with a single-filament fineness greater than 5.0, like 200D / 10F, 300D / 10F, etc., the first-side water-air device and the second-side water-air device are turned on simultaneously for cooling, so that the cooling length is greater and the cooling is more uniform. The situation of uneven cooling of the filament bundle or the surface being cold while the middle of the filament is not completely cooled will no longer occur, eliminating the uneven elongation of FDY fibers or the occurrence of the tendon phenomenon, and ensuring that there are no problems such as uneven horizontal stripes on the fabric surface during subsequent dyeing, thus guaranteeing the product quality. By controlling different flow rates, the purpose of gradually cooling the entire filament of FDY fibers with different thicknesses under process conditions is effectively achieved, eliminating the situation where the air valve of the first-side water-air device is fully open and the air volume is too large, resulting in sudden cooling on the outside of the filament and the middle of the filament not being cooled. Especially with the addition of the second-side water-air device part, the air volume entering the duct 1 can be adjusted by opening and closing the wire window installed in the front side of the position of the duct 1. When cooling the FDY by the first-side blowing device 6 and the second-side blowing device 4, the first box door 64 and the third box door 44 are closed, and the cooling air flows downward through the duct 1 and is discharged; the air volume in this section of the distance conforms to the process requirements as the air in the duct 1 follows the filament bundle and is brought into winding, which can well balance the uniformity of filament bundle cooling and eliminate the generation of tendon filaments.

[0052] Further improvement is that the air intake flow control method of the first-side blowing device 6 and the second-side blowing device 4 includes: adjusting the regulating valves 10 in the two air intake channels 11 based on different FDY varieties produced, and the air intake adjustment methods of the two side blowing devices include:

[0053] A1. When producing FDY single filaments with a dpf less than 5, the regulating valve 10 in the air intake channel 11 connected to the second-side blowing device 4 is closed; the regulating valve 10 in the air intake channel 11 connected to the first-side blowing device 6 is opened, and the FDY single filaments are cooled by controlling the air intake flow of the first-side blowing device 6;

[0054] When producing FDY thickened monofilaments with a dpf greater than 5, the regulating valve 10 in the air inlet channel 11 connected to the first side air blowing device 6 is opened, and the regulating valve 10 in the air inlet channel 11 connected to the second side air blowing device 4 is also opened simultaneously; the FDY thickened monofilaments are cooled by controlling the air inlet flow rates of the first side air blowing device 6 and the second side air blowing device 4.

[0055] By adjusting the air volume regulating valves 10 of the first side water-air device and the second side water-air device, cooling air with different process requirements can be provided for FDY fibers with different dpfs. The situation where the tow is cooled unevenly or the surface is cold but the middle of the filament is not cooled through will no longer occur, eliminating the problems of uneven elongation of FDY fibers or the appearance of tendon-like phenomena, and ensuring that there are no problems such as uneven horizontal stripes on the fabric surface during subsequent dyeing, thus guaranteeing the product quality. By controlling different flow rates, the purpose of gradually cooling the entire filament of FDY fibers with different thicknesses under process conditions is effectively achieved, eliminating the situation where the air valve of the first side water-air device is fully opened and the air volume is too large, resulting in sudden cooling on the outside of the filament and the middle of the filament not being cooled. After the above improvements, the device can meet the requirements of spinning cooling, improve the fiber cooling effect, solve the problem of insufficient side blowing cooling, improve the internal indicators of the fiber, avoid problems in subsequent dyeing, with a simple overall structure, low cost, easy to manufacture, guarantee product quality, and meet the production requirements.

[0056] The above embodiments are only the preferred embodiments of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantive changes and substitutions made by those skilled in the art based on the present application fall within the scope of protection required by the present application.

Claims

1. A special double-cooling spinning chamber structure for FDY with thick dpf melt spinning, comprising a spinning chamber base (2), a side-blowing rectifying area (5) provided on the spinning chamber base (2), and a duct (1) provided at the lower end of the side-blowing rectifying area (5), characterized in that: The side air-blowing rectifying area (5) includes a first side air-blowing device (6) and a second side air-blowing device (4) which are stacked on each other. Two air inlet channels (11) with regulating valves (10) are formed in the silk chamber base (2) through a partition plate (9). The duct (1) is shortened to form a space for installing the second side air-blowing device (4). The top of the duct (1) is installed at the lower discharge port of the second side air-blowing device (4). Part of the second side air-blowing device (4) penetrates through the floor slab (8) of the upper and lower layers to be installed.

2. A double-cooling spinning filament chamber structure, a special double-cooling spinning filament chamber structure for FDY with melt-spun thick dpf according to claim 1, characterized in that: The first side air-blowing device (6) includes a first housing (66), a first rectifying sieve (67) arranged in the first housing (66), and a first outer cover (68) arranged on the back of the first housing (66). The back of the first outer cover (68) is inclined. A triangular first air inlet space (63) is formed between the first outer cover (68) and the first rectifying sieve (67). A first box door (64) that can be opened and closed is arranged on the front side of the first housing (66). A cooling space (61) is formed between the first box door (64) and the first rectifying sieve (67). A heat preservation plate (65) is arranged at the top of the cooling space (61).

3. A dual-cooling spinning filament chamber structure, a dedicated dual-cooling spinning filament chamber structure for melt-spun coarse dpf FDY according to claim 2, characterized in that: The first outer cover (68) and the first housing (66) are detachably connected. A second box door (62) is arranged on the first outer cover (68). The first rectifying sieve (67) is disassembled and replaced through the second box door (62).

4. A double-cooling spinning filament chamber structure, a special double-cooling spinning filament chamber structure for melt spinning FDY with thick dpf according to claim 2, characterized in that: The second side air-blowing device (4) includes a second housing (45), a second rectifying sieve (43) arranged in the second housing (45), and a second outer cover (47) arranged on the back of the second housing (45). A flow dividing plate (46) is inclined on the back of the second outer cover (47). The back plate of the second outer cover (47) and the flow dividing plate (46) are combined to form an air supply channel (41) with openings at both ends. The two ends of the air supply channel (41) are respectively communicated with the lower end of the first air inlet space (63) and one of the air inlet channels (11) with a regulating valve (10). A triangular second air inlet space (42) is formed between the second outer cover (47) and the second rectifying sieve (43). The lower end of the second air inlet space (42) is communicated with the other air inlet channel (11) with a regulating valve (10). A third box door (44) that can be opened and closed is arranged on the front side of the second housing (45). A cooling space (61) is formed between the third box door (44) and the second rectifying sieve (43). The second rectifying sieve (43) is disassembled and assembled and replaced through the square of the third box door (44).

5. A double-cooling spinning filament chamber structure, a special double-cooling spinning filament chamber structure for FDY with melt-spun thick dpf according to claim 4, characterized in that: The flow dividing plate (46) is arranged parallel to the back plate of the second outer cover (47).

6. A double-cooling spinning filament chamber structure, a special double-cooling spinning filament chamber structure for FDY of melt-spun thick dpf according to claim 5, characterized in that: Oil rack moving grooves (3) penetrating through the first housing (66) and the second housing (45) are arranged on both sides of the cooling space (61).

7. A double-cooling spinning filament chamber structure, a special double-cooling spinning filament chamber structure for FDY of melt-spun thick dpf according to claim 6, characterized in that: An installation frame (7) is arranged on the outside of the second side air-blowing device (4).

8. A double-cooling spinning filament chamber structure for FDY dedicated to melt-spun thick dpf according to any one of claims 1 to 7, characterized in that: The method for cooling FDY filaments through the special double-cooling spinning silk chamber structure for melt-spun FDY includes: S1. Manufacture the first side air blowing device (6) according to the height of the side air blowing rectifying area (5) of the existing equipment; S2. Shorten the length of the aisle (1), and connect the shortened space through the second side air blowing device (4) to lengthen the air outlet length of the side air blowing rectifying area (5); S3. Install the nozzle assembly and the wire guide hook assembly onto the oil rack moving groove (3) and adjust them to the required positions; S4. By adjusting the air inlet flow rates of the first side air blowing device (6) and the second side air blowing device (4), cool the FDY monofilaments with different thicknesses.

9. A dual-cooling spinning chamber structure, a special dual-cooling spinning chamber structure for melt spinning FDY with a thick dpf according to claim 1, characterized in that: The air inlet flow rate control method for the first side air blowing device (6) and the second side air blowing device (4) includes: adjusting the regulating valves (10) in the two air inlet channels (11) based on the different FDY varieties produced. The air inlet volume adjustment methods for the two side air blowing devices include: A1. When producing FDY monofilaments with a fineness less than 16F, the regulating valve (10) in the air inlet channel (11) connected to the second side air blowing device (4) is closed; the regulating valve (10) in the air inlet channel (11) connected to the first side air blowing device (6) is opened, and the FDY monofilaments are cooled by controlling the air inlet flow rate of the first side air blowing device (6); A2. When producing FDY thickened monofilaments with a fineness greater than 16F, the regulating valve (10) in the air inlet channel (11) connected to the first side air blowing device (6) is opened, and the regulating valve (10) in the air inlet channel (11) connected to the second side air blowing device (4) is opened simultaneously; the FDY thickened monofilaments are cooled by controlling the air inlet flow rates of the first side air blowing device (6) and the second side air blowing device (4).

10. A double-cooling spinning filament chamber structure, a special double-cooling spinning filament chamber structure for FDY of melt-spun thick dpf according to claim 1, characterized in that: When cooling the FDY through the first side air blowing device (6) and the second side air blowing device (4), the first cabinet door (64) and the third cabinet door (44) are closed, and the cooling air flows downward through the aisle (1) and is discharged.

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