Continuous drying device for flame-retardant polyester yarns

Abstract

The invention relates to the technical field of flame-retardant yarn manufacturing processes, in particular to a flame-retardant polyester yarn continuous drying device which comprises a drying cylinder and a plurality of drying rollers rotationally connected into the drying cylinder. The lifting component comprises lifting sliding tables arranged at intervals in the circumferential direction and lifting blocks arranged on the lifting sliding tables, and the lifting blocks are used for being inserted into the lower sides of the yarns so that gaps can be formed in the lower sides of the yarns. The yarn drying device has the following effects that in the process that yarns move to the drying roller and the drying roller conveys the yarns, a lifting piece moves along with the yarns, a lifting sliding table moves, and meanwhile a lifting block is driven to be inserted into the lower side of the yarns, so that a gap exists between the lower side of the yarns and the drying roller, and hot air can move through the gap and dry the lower side of the yarns; and the yarn drying effect can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of flame-retardant yarn manufacturing technology, and in particular to a continuous drying device for flame-retardant polyester yarn. Background Art

[0002] Yarn is a kind of textile, which is processed into products of a certain fineness with various textile fibers. It is used for weaving, rope making, thread making, knitting and embroidery, etc. It is divided into short-staple yarn, continuous filament, etc. According to the different fields in which the fabric products are used, it is necessary to have different properties, such as waterproof, antibacterial, flame retardant, etc. Among them, since textile fabrics are mostly made of flammable materials, in the event of a fire, the flammable textile fabrics will accelerate the spread of the fire. Therefore, in a special occasion, it is necessary to use textile fabrics with flame retardant properties to improve the fire resistance.

[0003] The Chinese invention patent with application number 201410214307.1 discloses a method for preparing flame-retardant yarn, comprising the steps of: adding in a container, by weight, 10-15 parts of carbonamide, 15-25 parts of decabromodiphenylethane, 15-17 parts of diphenyl phosphate, 12-14 parts of cellulose ether, 5-7 parts of saturated fatty acid salt, and 3-5 parts of benzoate, and stirring for a certain period of time; adding a pH value regulator to adjust the pH value to 7; putting the yarn into the container and soaking it for 60-90 minutes; taking out the soaked yarn and drying it at 55°C for 30-60 minutes. In the above manner, the method for preparing flame-retardant yarn of the present invention soaks the yarn in a prepared flame-retardant solution, so that the yarn has high flame-retardant performance, and the method is simple and has high production efficiency.

[0004] During the preparation of the yarn, the drying device after sizing can modify the yarn to obtain the corresponding flame retardant effect, so the drying effect is very important. However, in general, the drying device inputs the yarn into the drying box, passes through the drying roller in a zigzag shape, and performs hot air drying inside. However, the part of the yarn in contact with the drying roller will always be suffocated on the surface of the drying roller, which reduces the drying effect on the side of the yarn close to the drying roller surface, affecting the quality of subsequent products. Summary of the invention

[0005] In order to improve the drying effect on the side of the yarn close to the drying roller, the present application provides a continuous drying device for flame-retardant polyester yarn.

[0006] The present application provides a continuous drying device for flame-retardant polyester yarn, which adopts the following technical solution: a continuous drying device for flame-retardant polyester yarn, comprising a drying cylinder and a plurality of drying rollers rotatably connected to the drying cylinder, the drying rollers having a lifting component, the lifting component comprising a lifting slide arranged at intervals along the circumferential direction, and a lifting block arranged on the lifting slide, the lifting block being used to be inserted into the lower side of the yarn so that there is a gap on the lower side of the yarn.

[0007] By adopting the above technical solution, when the yarn moves to the drying roller and the drying roller is in the process of conveying the yarn, the lifting member will move accordingly, the lifting slide will move, and at the same time, the lifting block will be driven to be inserted to the lower side of the yarn, so that there is a gap between the lower side of the yarn and the drying roller, and the hot air can move through the gap and dry the lower side of the yarn. At the same time, because in other states, the lifting component will make the drying roller flush, the possibility of the component cutting the yarn is reduced, and the yarn drying effect can be improved.

[0008] Preferably, the movement directions of the two adjacent lifting components are opposite, and after the lifting slide moves axially inward, the two adjacent lifting slides cause the yarn to form a curved shape.

[0009] By adopting the above technical solution, the curved yarn can be better limited on the drying roller, forming better support during the hot air blowing process. At the same time, with the support of the lifting block, the wind resistance of the yarn is increased after being lifted.

[0010] Preferably, a plurality of the lifting blocks are arranged at intervals along the axial direction, and the yarn is allowed to pass between adjacent lifting blocks.

[0011] By adopting the technical solution, the yarn is divided into multiple strands and then passes through the lifting blocks respectively.

[0012] Preferably, the lifting block comprises a first portion and a second portion, wherein the first portion is parallel to the axial direction of the drying roller, and the second portion is arranged to be inclined to one side and face upward.

[0013] Preferably, the first portion is flush with the outer side wall of the drying roller.

[0014] Preferably, a plurality of movable grooves are provided on the drying roller along the circumference, and the lifting slide is embedded in and slidably connected to the movable grooves. Resistance blocks are provided on both sides of the drying roller, and the resistance blocks are used to intermittently resist the lifting slide so that the lifting slide slides to the other side.

[0015] Preferably, a retraction spring is provided in the movable groove for resetting the lifting slide.

[0016] Preferably, the resistance block is located on the inner wall of the drying cylinder, the outer half of the arc portion of the drying roller is the yarn covering area, the top of the arc of the yarn covering area is divided into an avoidance area, and its two sides are contact areas, and the resistance block is located in the contact area.

[0017] By adopting the above technical solution, the lifting slide at the top will keep in contact with the yarn, and only part of the yarn will be lifted each time, which can form sufficient circumferential support force. In the process of back and forth movement, the yarn can also move back and forth, and the drying effect of the yarn can be better in the process of loosening and tightening.

[0018] Preferably, a convex top block is elastically slidably provided on the back side of the lifting block, and the convex top block has convex points facing outward, and the convex points are used to separate the yarns so as to maintain gaps between adjacent yarns.

[0019] Preferably, the exposed part of the convex top block is provided with a linkage rod, and the inner walls on both sides of the movable groove have linkage grooves for inserting the ends of the linkage rods, and the linkage grooves have a horizontal section and an inclined section. When the ends of the linkage rods slide in the inclined sections, the convex top block slides toward the outside.

[0020] To summarize, the present application includes at least one of the following beneficial technical effects: when the yarn moves onto the drying roller and the drying roller is in the process of conveying the yarn, the lifting piece will move accordingly, the lifting slide will move, and at the same time, the lifting block will be driven to be inserted into the lower side of the yarn, so that there is a gap between the lower side of the yarn and the drying roller, and hot air can move through the gap and dry the lower side of the yarn. At the same time, because in other states, the lifting component will make the drying roller flush, the possibility of the component cutting the yarn is reduced, and the yarn drying effect can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of this application; Figure 2 is a schematic diagram of the yarn path of the present application; Figure 3 It is a structural schematic diagram of the position of the drying roller and the abutment block; Figure 4 This is a partial exploded view of the drying roller; Figure 5 is a schematic diagram of the yarn covering area; Figure 6 It is a schematic diagram of the structure of the lifting block; Figure 7 It is an exploded schematic diagram of the lifting block; Figure 8 yes Figure 4 Enlarged schematic diagram of part A in the middle.

[0022] Explanation of the reference numerals: 100, drying cylinder; 110, drying roller; 111, lifting slide; 112, lifting block; 113, first part; 114, second part; 115, movable groove; 116, retraction spring; 117, resistance block; 120, yarn covering area; 121, avoidance area; 122, contact area; 130, convex top block; 131, convex point; 132, linkage rod; 133, linkage groove. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings.

[0024] The present application embodiment discloses a continuous drying device for flame retardant polyester yarn, referring to Figure 1 , Figure 2 , including a drying drum 100 and a plurality of drying rollers 110 rotatably connected to the drying drum 100. In this embodiment, three drying rollers 110 are provided, and the drying rollers 110 are distributed along a zigzag line. The drying rollers 110 have a lifting component, and the lifting component includes a lifting slide 111 arranged at intervals along the circumferential direction, and a lifting block 112 arranged on the lifting slide 111. The lifting block 112 is used to be inserted into the lower side of the yarn so that there is a gap on the lower side of the yarn.

[0025] The two adjacent lifting components move in opposite directions. After the lifting slides 111 move axially inward, the two adjacent lifting slides 111 make the yarn bend. Specifically, a plurality of lifting blocks 112 are arranged at intervals along the axial direction, and the yarn passes through between adjacent lifting blocks 112. The yarn is generally divided into multiple groups, and the yarn of each group will pass through a lifting block 112.

[0026] Reference Figure 3 , Figure 4 The lifting block 112 includes a first portion 113 welded to the lifting slide 111 and a second portion 114 integrally connected to one end of the first portion 113. The first portion 113 is parallel to the axial direction of the drying roller 110, and the second portion 114 is tilted upward to one side. It is worth noting that the first portion 113 is flush with the outer wall of the drying roller 110. In this way, when the lifting block 112 slides, the edge of the first portion 113 will not cut the yarn.

[0027] A plurality of movable grooves 115 are provided along the circumference of the drying roller 110, and the movable grooves 115 are provided for the lifting slide 111 to be inserted and slidably connected. Both sides of the drying roller 110 are provided with abutment blocks 117, and the abutment blocks 117 are used to intermittently abut against the lifting slide 111, so that the lifting slide 111 slides toward the other side. When the lifting slide 111 slides toward the other side, the yarn originally located on the first part 113 will slide to the second part 114 as the movement proceeds. At this time, there is a suspended yarn portion between two adjacent second parts 114, so that a drying effect can be formed on the lower side of the yarn.

[0028] At the same time, since the inclined surfaces between the two second parts 114 are relatively arranged, the yarn will form a slightly bent state during the movement, and the yarn will be supported by the second part 114. Although the yarn is suspended in the air, due to the clamping effect on both sides, the yarn's ability to resist wind in hot air can be improved, so that the yarn can maintain a better stability effect.

[0029] Reference Figure 5 , a retraction spring 116 is provided in the movable groove 115, which is used to reset the lifting slide 111. The abutment block 117 is located on the inner wall of the drying drum 100, and the outer half arc portion of the drying roller 110 is the yarn covering area 120. The top of the arc of the yarn covering area 120 is divided into an avoidance area 121, and the two sides thereof are contact areas 122. The abutment block 117 is located in the contact area 122. The end of the abutment block 117 and the end of the lifting slide 111 are both arc-shaped, and the two are used for abutment. As the drying roller 110 rotates, the end of the abutment block 117 will abut the end of the lifting slide 111, thereby causing the lifting block 112 to move. After the movement, under the action of the retraction spring 116, the yarn will be reset and attached to the surface of the drying roller 110 again.

[0030] At the same time, during the movement, the avoidance area 121 at the top can maintain the contact force on the yarn, allowing the yarn to move. During the sliding process of the lifting block 112, the yarn will move in a direction perpendicular to the length of the yarn, thereby forming a similar loosening movement. At the same time, after being lifted, the yarn can form a better drying effect.

[0031] Reference Figure 4 , Figure 6 , Figure 7 In order to limit the yarns that slide onto the second part 114, a convex top block 130 is provided on the back side of the lifting block 112 in this embodiment. The convex top block 130 has a convex point 131 facing outward. The convex point 131 is used to separate the yarns so as to keep a gap between adjacent yarns. The dot-shaped end of the convex point 131 originally protrudes outward from the second part 114, and the yarns will be pre-separated. When the convex point 131 moves upward, the yarns can be divided to keep the distance between the yarns.

[0032] Reference Figure 7 , Figure 8 In order to realize the movable path of the convex top block 130, a linkage rod 132 is provided on the exposed part of the convex top block 130, and the inner walls on both sides of the movable groove 115 have linkage grooves 133 for the ends of the linkage rod 132 to be inserted. The linkage groove 133 has a horizontal section and an inclined section. When the end of the linkage rod 132 slides in the inclined section, the convex top block 130 slides toward the outside.

[0033] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A continuous drying device for flame-retardant polyester yarn, comprising a drying cylinder (100) and a plurality of drying rollers (110) rotatably connected to the drying cylinder (100), characterized in that: The drying roller (110) has a lifting component, which includes a lifting slide (111) arranged at intervals along the circumferential direction and a lifting block (112) arranged on the lifting slide (111), and the lifting block (112) is used to be inserted into the lower side of the yarn so that there is a gap on the lower side of the yarn.

2. The continuous drying device for flame-retardant polyester yarn according to claim 1, characterized in that: The two adjacent lifting components move in opposite directions, and after the lifting slide (111) moves axially inward, the two adjacent lifting slides (111) cause the yarn to form a curved shape.

3. The continuous drying device for flame-retardant polyester yarn according to claim 2, characterized in that: A plurality of the lifting blocks (112) are arranged at intervals along the axial direction, and yarns pass through spaces between adjacent lifting blocks (112).

4. The continuous drying device for flame-retardant polyester yarn according to claim 3, characterized in that: The lifting block (112) comprises a first portion (113) and a second portion (114), wherein the first portion (113) is parallel to the axial direction of the drying roller (110), and the second portion (114) is arranged to be inclined to one side and face upward.

5. The continuous drying device for flame-retardant polyester yarn according to claim 4, characterized in that: The first portion (113) is flush with the outer side wall of the drying roller (110).

6. The continuous drying device for flame-retardant polyester yarn according to claim 5, characterized in that: A plurality of movable grooves (115) are arranged on the drying roller (110) along the circumference, and the movable grooves (115) are for the lifting slide (111) to be embedded and slidably connected. Resistance blocks (117) are arranged on both sides of the drying roller (110), and the resistance blocks (117) are used to intermittently resist the lifting slide (111) so that the lifting slide (111) slides to the other side.

7. A continuous drying device for flame-retardant polyester yarn according to claim 6, characterized in that: The movable groove (115) has a retraction spring (116) therein, which is used to reset the lifting slide (111).

8. The continuous drying device for flame-retardant polyester yarn according to claim 7, characterized in that: The abutment block (117) is located on the inner wall of the drying cylinder (100); the outer half arc portion of the drying roller (110) is a yarn covering area (120); the top of the arc of the yarn covering area (120) is divided into an avoidance area (121), both sides of which are contact areas (122); and the abutment block (117) is located in the contact area (122).

9. The continuous drying device for flame-retardant polyester yarn according to claim 8, characterized in that: The back side of the lifting block (112) is slidably provided with a convex top block (130), and the convex top block (130) has a convex point (131) facing outward, and the convex point (131) is used to separate the yarns so as to maintain a gap between adjacent yarns.

10. A continuous drying device for flame-retardant polyester yarn according to claim 9, characterized in that: The exposed portion of the convex top block (130) is provided with a linkage rod (132), and the inner walls on both sides of the movable groove (115) have linkage grooves (133) for the ends of the linkage rods (132) to be inserted, and the linkage grooves (133) have a horizontal section and an inclined section, and when the ends of the linkage rods (132) slide in the inclined sections, the convex top block (130) slides outward.

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