A drying device for polyester fiber production

Abstract

The application relates to a drying device for polyester fiber production, which comprises a drying box body, feeding ports and discharging ports are respectively arranged on opposite two side walls of the drying box body and used for conveying polyester fibers, a plurality of groups of extrusion roller sets are distributed on the inner wall of the drying box body along the conveying direction of the polyester fibers, each extrusion roller set comprises an upper sliding block which is connected to the inner wall of the drying box body in the vertical direction, an upper pressing roller which is connected to the upper sliding block in the vertical direction and abuts against the upper surface of the polyester fiber, a lower sliding block which is connected to the inner wall of the drying box body in the vertical direction, and a lower pressing roller which is connected to the lower sliding block in the vertical direction and abuts against the lower surface of the polyester fiber, the drying box body is provided with a first adjusting mechanism which drives the opposite upper sliding block and lower sliding block to synchronously slide towards each other or away from each other so as to adjust the gap between the upper pressing roller and the lower pressing roller, and the gap between the upper pressing roller and the lower pressing roller of the plurality of groups of extrusion roller sets gradually decreases from the feeding port to the discharging port. The application has the effect of improving the drying efficiency of the polyester fiber.

Description

Technical Field

[0001] This application relates to the field of polyester fiber production technology, and in particular to a drying apparatus for polyester fiber production. Background Technology

[0002] Polyester fiber, also known as polyester fiber, is a synthetic fiber made of polyethylene terephthalate (PET). Due to its excellent properties such as high strength, good tensile strength, abrasion resistance, and colorfastness, it is widely used in clothing, home textiles, industrial textiles, automotive interiors, ropes, fishing nets, filter materials, and many other fields.

[0003] Currently, polyester fibers absorb moisture during production and require drying equipment for processing. Existing drying equipment includes an upper extrusion plate above the polyester fibers, a lower extrusion plate below the polyester fibers, and cylinders that control the movement of the upper and lower extrusion plates. Drying is achieved by driving the upper and lower extrusion plates to slide closer to each other and squeezing out the water from the polyester fibers.

[0004] However, in the extrusion and dewatering process using the upper and lower extrusion plates, the polyester fiber stops being conveyed after reaching the extrusion station and is then restarted after extrusion is completed. This process involves extruding the polyester fiber at different locations, requiring repeated start-stop cycles for the polyester fiber conveying, which reduces the drying efficiency of the polyester fiber. Therefore, further improvements are needed. Utility Model Content

[0005] In order to improve the drying efficiency of polyester fibers, this application provides a drying apparatus for polyester fiber production.

[0006] The drying device for polyester fiber production provided in this application adopts the following technical solution: A drying device for polyester fiber production includes a drying chamber. The drying chamber has an inlet and an outlet on its opposite side walls for conveying polyester fibers. Multiple sets of extrusion rollers are spaced apart along the polyester fiber conveying direction on the inner wall of the drying chamber. Each extrusion roller set includes an upper slider that slides vertically to the inner wall of the drying chamber, an upper pressure roller that rotates around its own axis and is connected to the upper slider and abuts against the upper surface of the polyester fiber, a lower slider that slides vertically to the inner wall of the drying chamber, and a lower pressure roller that rotates around its own axis and is connected to the lower slider and abuts against the lower surface of the polyester fiber. The drying chamber is equipped with a first adjusting mechanism that drives the opposing upper and lower sliders to slide synchronously towards or away from each other to adjust the gap between the upper and lower pressure rollers. The gap between the upper and lower pressure rollers of the multiple extrusion roller sets gradually decreases from the inlet to the outlet.

[0007] By adopting the above technical solution, multiple sets of extrusion rollers, together with the first adjustment mechanism, can flexibly adjust the gap between the upper and lower pressure rollers, and the gap gradually decreases along the conveying direction. During the continuous conveying process of polyester fiber, multiple sets of extrusion rollers can gradually squeeze the polyester fiber, more effectively squeezing out the moisture. The polyester fiber does not need to stop conveying, thus improving the drying efficiency of the polyester fiber.

[0008] Preferably, the first adjustment mechanism includes a movable block that slides horizontally along the side wall of the drying chamber, a pair of hinge rods respectively hinged to the upper and lower ends of the movable block, and a first driving member for driving the movable block to slide. The upper slider and the lower slider are symmetrically arranged along the movable block, wherein the end of one hinge rod is hinged to the upper slider and the end of the other hinge rod is hinged to the lower slider.

[0009] By adopting the above technical solution, the horizontal sliding of the movable block drives the hinge rod to rotate, so that the upper and lower sliders slide synchronously toward each other or away from each other, thereby realizing the adjustment of the gap between the upper and lower pressure rollers, which is convenient for flexibly adjusting the gap according to the drying requirements of polyester fibers.

[0010] Preferably, the first driving component is a telescopic cylinder, the cylinder body of which is fixedly connected to the side wall of the drying chamber, the piston rod of which is axially parallel to the sliding direction of the movable block, and the piston rod of which is fixedly connected to the movable block.

[0011] By adopting the above technical solution, the telescopic cylinder is used as the first driving component. Its cylinder body is fixed to the inner wall of the drying chamber, and the piston rod is axially parallel to the sliding direction of the movable block and fixedly connected to the movable block. It can accurately drive the movable block to slide horizontally. The movable block drives the upper and lower sliders to slide synchronously towards or away from each other through the hinge rod, thereby realizing the adjustment of the gap between the upper and lower pressure rollers.

[0012] Preferably, the first adjustment mechanism includes an upper screw sleeve fixedly connected to the side wall of the upper slider, a lower screw sleeve fixedly connected to the side wall of the lower slider, a first adjustment screw rotatably connected to the side wall of the drying chamber, and a second driving member for driving the first adjustment screw to rotate. The first adjustment screw has a first threaded section and a second threaded section, the first threaded section and the second threaded section are in opposite directions, and the upper screw sleeve and the lower screw sleeve are respectively threaded onto the first threaded section and the second threaded section.

[0013] By adopting the above technical solution, the first adjustment mechanism cooperates with the first adjustment screw with opposite thread sections through the upper and lower screw sleeves. When the second driving member drives the first adjustment screw to rotate, the relative upper and lower sliders can slide synchronously towards each other or away from each other, thereby facilitating the adjustment of the gap between the upper and lower pressure rollers to adapt to different drying requirements.

[0014] Preferably, the second driving component is a motor.

[0015] By adopting the above technical solution, the motor is used as the second driving component, which can stably drive the first adjusting screw to rotate. Then, through the first and second threaded sections with opposite directions on the first adjusting screw, the upper and lower threaded sleeves respectively fitted on them are driven to move, so that the upper and lower sliders slide synchronously in the direction of moving closer or further away from each other, and the gap between the upper and lower pressure rollers is precisely adjusted.

[0016] Preferably, the drying chamber has a built-in hot air mechanism located downstream of the extrusion roller group on the side near the discharge port. The hot air mechanism includes an upper air blowing pipe above the polyester fiber, a lower air blowing pipe below the polyester fiber, and an air inlet main pipe connecting the upper air blowing pipe and the lower air blowing pipe. A hot air fan is connected to the air inlet main pipe. The lower peripheral wall of the upper air blowing pipe and the upper peripheral wall of the lower air blowing pipe are provided with air outlet holes for blowing hot air toward the polyester fiber. Multiple air outlet holes are provided and are distributed at intervals along the axial direction of the upper air blowing pipe and the lower air blowing pipe.

[0017] By adopting the above technical solution, after the extrusion roller group squeezes water out of the polyester fiber, the hot air mechanism can further dry the polyester fiber. The hot air generated by the hot air blower enters the upper and lower air blowers through the main air inlet pipe and is blown towards the polyester fiber through the air outlet. Multiple air outlets are distributed axially along the upper and lower air blowers, which can make the hot air act evenly on the polyester fiber, thereby improving the drying effect and drying efficiency.

[0018] Preferably, both ends of the upper air pipe and both ends of the lower air pipe are slidably fitted with sealing sleeves, the inner peripheral wall of the sealing sleeve abuts against the outer peripheral wall of the upper air pipe or the lower air pipe, a corrugated telescopic tube is fixedly connected between the sealing sleeve and the inner wall of the drying chamber, and the drying chamber is provided with a second adjustment mechanism for adjusting the sliding position of the sealing sleeve.

[0019] By adopting the above technical solution, in the drying device for polyester fiber production, the sealing sleeves fitted at both ends of the upper and lower air blowing pipes can slide under the adjustment of the second adjustment mechanism. In conjunction with the corrugated telescopic pipe, the air outlet range of the upper and lower air blowing pipes can be flexibly adjusted, thereby accurately adjusting the hot air action area according to the actual drying needs of polyester fiber and improving the hot air utilization rate.

[0020] Preferably, a fixing rod is fixedly connected between the sealing sleeve of the upper air blowing pipe and the sealing sleeve of the lower air blowing pipe located on the same side. A connecting block is fixedly connected to the outer peripheral wall of the sealing sleeve on the upper air blowing pipe. The second adjustment mechanism includes a second adjusting screw rotatably connected to the drying chamber. The second adjusting screw has a third threaded section and a fourth threaded section. The threads of the third threaded section and the fourth threaded section are opposite in direction. Two connecting blocks located on the upper air blowing pipe are respectively threadedly connected to the third threaded section and the fourth threaded section.

[0021] By adopting the above technical solution, the upper and lower sealing sleeves are moved synchronously by using a fixed rod. The third and fourth threaded sections of the second adjusting screw cooperate with the upper air pipe sealing sleeve connecting block to drive the two sealing sleeves to move closer or further away synchronously, flexibly adjusting the hot air outlet range of the upper and lower air pipes, and better adapting to the drying needs of polyester fibers of different widths.

[0022] In summary, this utility model has the following beneficial effects: 1. Multiple sets of extrusion rollers, in conjunction with the first adjustment mechanism, can flexibly adjust the gap between the upper and lower pressure rollers, and the gap gradually decreases along the conveying direction. During the continuous conveying process of polyester fiber, multiple sets of extrusion rollers can gradually squeeze the polyester fiber, more effectively squeezing out the moisture. The polyester fiber does not need to stop conveying, thus improving the drying efficiency of the polyester fiber. 2. After the extrusion rollers squeeze the water out of the polyester fibers, the hot air mechanism can further dry the polyester fibers. The hot air generated by the hot air blower enters the upper and lower air blowers through the main air inlet pipe and is blown toward the polyester fibers through the air outlet. Multiple air outlets are distributed axially along the upper and lower air blowers, which can make the hot air act evenly on the polyester fibers, improving the drying effect and drying efficiency. 3. In the drying device for polyester fiber production, the sealing sleeves fitted at both ends of the upper and lower air blowing pipes can slide down under the adjustment of the second adjustment mechanism. In conjunction with the corrugated telescopic pipe, the air outlet range of the upper and lower air blowing pipes can be flexibly adjusted, thereby precisely adjusting the hot air action area according to the actual drying needs of polyester fibers and improving the hot air utilization rate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a drying device for polyester fiber production in Example 1; Figure 2 This is a schematic diagram of the internal structure of the drying chamber in Example 1; Figure 3 yes Figure 1 A magnified view of a portion at point A; Figure 4 This is a schematic diagram of the structure of the second adjustment mechanism in Embodiment 1; Figure 5 This is a schematic diagram of the structure of the first adjustment mechanism in Embodiment 2.

[0024] In the diagram, 1. Drying chamber; 11. Feed inlet; 12. Discharge outlet; 13. Drain pipe; 14. First chute; 15. Bellows cover; 16. Second chute; 2. Extrusion roller assembly; 21. Upper slider; 22. Upper pressure roller; 23. Lower slider; 24. Lower pressure roller; 25. Extension plate; 3. First adjustment mechanism; 31. Movable block; 32. Hinge rod; 33. First drive component; 34. Upper screw sleeve; 35. Lower screw sleeve; 36. First adjusting screw; 37. Second drive component; 4. Hot air mechanism; 41. Upper air pipe; 42. Lower air pipe; 43. Main air inlet pipe; 44. Sealing sleeve; 45. Corrugated telescopic pipe; 46. Fixed rod; 47. Connecting block; 5. Second adjustment mechanism; 51. Second adjusting screw; 52. Third drive component. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] Example 1: This application discloses a drying apparatus for polyester fiber production, referring to... Figure 1 , Figure 2 The system includes a drying chamber 1, with an inlet 11 and an outlet 12 on opposite side walls for conveying polyester fibers. A drain pipe 13 is installed on the bottom wall of the drying chamber 1. Multiple sets of extrusion rollers 2 are distributed at intervals along the polyester fiber conveying direction on the inner wall of the drying chamber 1. Each extrusion roller 2 includes an upper slider 21 that slides vertically to the inner wall of the drying chamber 1, an upper pressure roller 22 that rotates around its own axis and is connected to the upper slider 21 and abuts against the upper surface of the polyester fiber, a lower slider 23 that slides vertically to the inner wall of the drying chamber 1, and a lower pressure roller 24 that rotates around its own axis and is connected to the lower slider 23 and abuts against the lower surface of the polyester fiber. The side wall of the drying chamber 1 is provided with a first slide groove 14 for the upper slider 21 and the lower slider 23 to slide. A bellows cover 15 is provided between the upper end of the slide groove and the upper slider 21, between the upper slider 21 and the lower slider 23, and between the lower end of the slide groove and the lower slider 23 to cover the first slide groove 14.

[0027] Reference Figure 1 , Figure 3The drying chamber 1 is equipped with a first adjustment mechanism 3 that drives the opposing upper slider 21 and lower slider 23 to slide synchronously toward or away from each other to adjust the gap between the upper pressure roller 22 and the lower pressure roller 24. In this embodiment, a second slide groove 16 is formed on the outer side wall of the drying chamber 1 along the polyester fiber conveying direction. The first adjustment mechanism 3 includes a movable block 31 slidably connected to the second slide groove 16, a pair of hinge rods 32 respectively hinged to the upper and lower ends of the movable block 31, and a first driving member 33 for driving the movable block 31 to slide. The upper slider 21 and lower slider 23 are symmetrically arranged along the movable block 31. An extension plate 25 is fixedly connected to the outer side wall of both the upper slider 21 and the lower slider 23. The end of one hinge rod 32 is hinged to the extension plate 25 of the upper slider 21, and the end of the other hinge rod 32 is hinged to the extension plate 25 of the lower slider 23. The first driving component 33 is a telescopic cylinder, which can be an electric cylinder or a pneumatic cylinder. The cylinder body of the telescopic cylinder is fixedly connected to the outer wall of the drying chamber 1. The piston rod of the telescopic cylinder is axially parallel to the sliding direction of the movable block 31, and the piston rod of the telescopic cylinder is fixedly connected to the movable block 31. The gap between the upper pressure roller 22 and the lower pressure roller 24 of the multiple sets of extrusion rollers 2 gradually decreases from the feed inlet 11 to the discharge outlet 12.

[0028] Reference Figure 1 , Figure 4 A hot air mechanism 4 is built into the side of the drying chamber 1 near the discharge port 12, located downstream of the extrusion roller group 2. The hot air mechanism 4 includes an upper air pipe 41 fixedly passing through the side wall of the drying chamber 1 and located above the polyester fibers, a lower air pipe 42 fixedly passing through the side wall of the drying chamber 1 and located below the polyester fibers, and a main air inlet pipe 43 connecting the upper air pipe 41 and the lower air pipe 42. The upper air pipe 41 is parallel to the upper pressure roller 22, and the lower air pipe 42 is parallel to the upper air pipe 41. The lower air pipe 42 and the upper air pipe 41 are staggered. The lower peripheral wall of the upper air pipe 41 and the upper peripheral wall of the lower air pipe 42 are provided with air outlet holes for blowing hot air toward the polyester fibers. Multiple air outlet holes are provided and are spaced apart along the axial direction of the upper air pipe 41 and the lower air pipe 42. The main air inlet pipe 43 is located on the outside of the drying chamber 1 and is connected to a hot air blower.

[0029] Both ends of the upper air duct 41 and both ends of the lower air duct 42 are slidably fitted with sealing sleeves 44. The inner peripheral wall of the sealing sleeve 44 abuts against the outer peripheral wall of the upper air duct 41 or the lower air duct 42. A corrugated telescopic tube 45 is fixedly connected between the sealing sleeve 44 and the inner wall of the drying chamber 1. The corrugated telescopic tube 45 is fitted onto the upper air duct 41 and the lower air duct 42. A fixing rod 46 is fixedly connected between the sealing sleeve 44 of the upper air blowing pipe 41 and the sealing sleeve 44 of the lower air blowing pipe 42 located on the same side. The drying chamber 1 is provided with a second adjustment mechanism 5 for adjusting the sliding position of the sealing sleeve 44. A connecting block 47 is fixedly connected to the outer peripheral wall of the sealing sleeve 44 on the upper air blowing pipe 41. The second adjustment mechanism 5 includes a second adjusting screw 51 rotatably connected to the drying chamber 1 and a third driving member 52 for driving the second adjusting screw 51 to rotate. The second adjusting screw 51 is located above the upper air blowing pipe 41. The second adjusting screw 51 has a third threaded section and a fourth threaded section. The thread directions of the third threaded section and the fourth threaded section are opposite. The two connecting blocks 47 located on the upper air blowing pipe 41 are respectively threadedly connected to the third threaded section and the fourth threaded section. The third driving component 52 can be a motor or a handwheel. In this embodiment, the third driving component 52 is a motor. The motor is fixedly connected to the outer wall of the drying chamber 1. The output shaft of the motor is coaxially fixed to the second adjusting screw 51. The third and fourth threaded sections of the second adjusting screw 51 cooperate with the connecting block 47 of the upper air blowing pipe 41 sealing sleeve 44 to drive the two sealing sleeves 44 to move closer or further away synchronously, flexibly adjusting the hot air outlet range of the upper and lower air blowing pipes 42 to better adapt to the drying needs of polyester fibers of different widths.

[0030] The implementation principle of the drying device for polyester fiber production in this application embodiment is as follows: the piston rod of the telescopic cylinder drives the movable block 31 to slide horizontally, thereby driving the hinge rod 32 to rotate, so that the upper slider 21 and the lower slider 23 slide synchronously towards or away from each other, realizing the adjustment of the gap between the upper pressure roller 22 and the lower pressure roller 24. This allows for flexible adjustment of the gap according to the drying requirements of polyester fiber. Multiple sets of extrusion rollers 2, together with the first adjustment mechanism 3, can flexibly adjust the gap between the upper pressure roller 22 and the lower pressure roller 24, and the gap gradually decreases along the conveying direction. During the continuous conveying process of polyester fiber, multiple sets of extrusion rollers 2 can gradually extrude the polyester fiber. The extruded water is discharged from the drain pipe 13. After passing through the last extrusion roller set 2, the hot air generated by the hot air blower enters the upper air pipe 41 and the lower air pipe 42 through the air inlet main pipe 43, and is blown towards the polyester fiber through the air outlet. Multiple air outlets are distributed axially along the upper air pipe 41 and the lower air pipe 42, which can make the hot air act evenly on the polyester fiber, improving the drying effect and drying efficiency.

[0031] Example 2: The difference from Example 1 is that, referring to Figure 5In this embodiment, the first adjusting mechanism 3 includes an upper threaded sleeve 34 fixedly connected to the extension plate 25 of the upper slider 21, a lower threaded sleeve 35 fixedly connected to the outer wall of the extension plate 25 of the lower slider 23, a first adjusting screw 36 rotatably connected to the outer wall of the drying chamber 1, and a second driving member 37 for driving the first adjusting screw 36 to rotate. The first adjusting screw 36 is vertically arranged and has a first threaded section and a second threaded section. The first threaded section and the second threaded section are in opposite directions. The upper threaded sleeve 34 and the lower threaded sleeve 35 are respectively threaded onto the first threaded section and the second threaded section. The second driving member 37 can be a motor or a handwheel. In this embodiment, the second driving member 37 is a motor, which is fixedly connected to the outer wall of the drying chamber 1, and the output shaft of the motor is coaxially fixed to the first adjusting screw 36.

[0032] The second driving component 37 drives the first adjusting screw 36 to rotate, and then drives the upper screw sleeve 34 and the lower screw sleeve 35 respectively sleeved on the first adjusting screw 36 to move through the first threaded section and the second threaded section with opposite directions, so as to realize that the upper slider 21 and the lower slider 23 slide synchronously in the direction of moving closer or further away from each other, and precisely adjust the gap between the upper pressure roller 22 and the lower pressure roller 24.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying apparatus for polyester fiber production, characterized in that: The equipment includes a drying chamber (1), on which opposite side walls are respectively provided an inlet (11) and an outlet (12) for conveying polyester fibers. Multiple sets of extrusion rollers (2) are distributed at intervals along the polyester fiber conveying direction on the inner wall of the drying chamber (1). Each extrusion roller (2) includes an upper slider (21) that slides vertically and is connected to the inner wall of the drying chamber (1), an upper pressure roller (22) that rotates around its own axis and is connected to the upper slider (21) and abuts against the upper surface of the polyester fiber, and a roller that slides vertically and is connected to the drying chamber (1). The inner wall has a lower slider (23) and a lower pressure roller (24) that rotates around its own axis and is connected to the lower slider (23) and abuts against the lower surface of the polyester fiber. The drying box (1) is provided with a first adjustment mechanism (3) that drives the opposing upper slider (21) and lower slider (23) to slide synchronously toward each other or away to adjust the gap between the upper pressure roller (22) and the lower pressure roller (24). The gap between the upper pressure roller (22) and the lower pressure roller (24) of the multiple sets of extrusion rollers (2) gradually decreases from the feed port (11) to the discharge port (12).

2. The drying apparatus for polyester fiber production according to claim 1, characterized in that: The first adjustment mechanism (3) includes a movable block (31) that slides horizontally along the side wall of the drying chamber (1), a pair of hinge rods (32) that are respectively hinged to the upper and lower ends of the movable block (31), and a first driving member (33) that drives the movable block (31) to slide. The upper slider (21) and the lower slider (23) are symmetrically arranged along the movable block (31), wherein the end of one hinge rod (32) is hinged to the upper slider (21), and the end of the other hinge rod (32) is hinged to the lower slider (23).

3. The drying apparatus for polyester fiber production according to claim 2, characterized in that: The first driving component (33) is a telescopic cylinder. The cylinder body of the telescopic cylinder is fixedly connected to the side wall of the drying chamber (1). The piston rod of the telescopic cylinder is parallel to the sliding direction of the movable block (31). The piston rod of the telescopic cylinder is fixedly connected to the movable block (31).

4. The drying apparatus for polyester fiber production according to claim 1, characterized in that: The first adjustment mechanism (3) includes an upper screw sleeve (34) fixedly connected to the side wall of the upper slider (21), a lower screw sleeve (35) fixedly connected to the side wall of the lower slider (23), a first adjustment screw (36) rotatably connected to the side wall of the drying chamber (1), and a second driving member (37) for driving the first adjustment screw (36) to rotate. The first adjustment screw (36) has a first threaded section and a second threaded section. The first threaded section and the second threaded section are in opposite directions. The upper screw sleeve (34) and the lower screw sleeve (35) are respectively threaded onto the first threaded section and the second threaded section.

5. A drying apparatus for polyester fiber production according to claim 4, characterized in that: The second driving component (37) is a motor.

6. A drying apparatus for polyester fiber production according to claim 1, characterized in that: The drying chamber (1) has a hot air mechanism (4) located downstream of the extrusion roller group (2) on the side near the discharge port (12). The hot air mechanism (4) includes an upper air pipe (41) above the polyester fiber, a lower air pipe (42) below the polyester fiber, and an air inlet main pipe (43) connecting the upper air pipe (41) and the lower air pipe (42). The air inlet main pipe (43) is connected to a hot air blower. The lower peripheral wall of the upper air pipe (41) and the upper peripheral wall of the lower air pipe (42) are provided with air outlet holes for blowing hot air toward the polyester fiber. There are multiple air outlet holes and they are distributed at intervals along the axial direction of the upper air pipe (41) and the lower air pipe (42).

7. A drying apparatus for polyester fiber production according to claim 6, characterized in that: Both ends of the upper air pipe (41) and both ends of the lower air pipe (42) are fitted with sealing sleeves (44). The inner circumferential wall of the sealing sleeve (44) abuts against the outer circumferential wall of the upper air pipe (41) or the lower air pipe (42). A corrugated telescopic pipe (45) is fixedly connected between the sealing sleeve (44) and the inner wall of the drying chamber (1). The drying chamber (1) is provided with a second adjustment mechanism (5) for adjusting the sliding position of the sealing sleeve (44).

8. A drying apparatus for polyester fiber production according to claim 7, characterized in that: A fixing rod (46) is fixedly connected between the sealing sleeve (44) of the upper air pipe (41) and the sealing sleeve (44) of the lower air pipe (42) located on the same side. A connecting block (47) is fixedly connected to the outer peripheral wall of the sealing sleeve (44) on the upper air pipe (41). The second adjustment mechanism (5) includes a second adjusting screw (51) rotatably connected to the drying box (1). The second adjusting screw (51) has a third thread section and a fourth thread section. The thread directions of the third thread section and the fourth thread section are opposite. The two connecting blocks (47) located on the upper air pipe (41) are respectively threaded to the third thread section and the fourth thread section.

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