Polyester chip crystallizing and drying equipment

Abstract

The invention relates to the technical field of drying equipment, and particularly discloses polyester chip crystallization drying equipment which comprises a drying cylinder, a feeding port and an exhaust port are formed in the drying cylinder, a discharging pipe and an air inlet pipe are further arranged at the bottom of the drying cylinder, an annular cylinder is arranged in the drying cylinder, and a sealing plate with air holes is arranged at the bottom of the annular cylinder in an up-down sliding mode. A layering module is further arranged on the drying cylinder and comprises a bearing unit and a layering unit; the bearing unit comprises a fixed cylinder fixedly arranged in the drying cylinder, a lifting frame vertically and elastically slides on the outer side of the fixed cylinder, the lower end of the lifting frame abuts against the annular cylinder, and a communicating cavity is formed between the lifting frame and the drying cylinder. The drying device has the beneficial effects that when upper-layer small-particle-size materials are completely dried, the bottoms of the small-particle-size materials are completely sealed, hot air enters the communicating cavity after passing through the lower large-particle-size materials and is finally exhausted from the exhaust port till the lower large-particle-size materials are completely dried, and the small-particle-size materials can be effectively prevented from being excessively dried.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to polyester chip crystallization drying equipment. Background Art

[0002] Polyester chips usually refer to polyester raw materials obtained by polymerization production, which are generally processed into flaky particles of about 4*5*2 mm. The process routes for polyester production include direct esterification and ester exchange. The PTA method has the advantages of low raw material consumption and short reaction time. Since the 1980s, it has become the main process and preferred technical route for polyester. The large-scale production line is a continuous production process, while the semi-continuous and intermittent production processes are suitable for medium and small-scale production equipment. The uses of polyester now include fibers, various containers, packaging materials, films, films, engineering plastics and other fields. The crystallization of wet polyester chips will affect the performance of pet films. A fluidized bed is needed to dry the wet polyester chip crystals, so a polyester chip crystallization drying equipment is proposed.

[0003] Chinese patent application number CN221881994U discloses a polyester chip crystallization drying device for a PET film production line. The device comprises a base and a support plate. The support plate is mounted on the top of the base, and a tilting shaft is mounted on one end of the support plate. The support plate is movably connected to the base via the tilting shaft. A rotating motor is mounted on the top of the support plate, and a rotating shaft is mounted on the output end of the rotating motor. The surface of the rotating shaft is covered with a gear. This patent not only realizes the convenient feeding and rotary drying process for polyester chip crystallization, facilitates the efficient tumbling rotation drive for polyester chip crystallization, avoids local overheating causing damage to polyester chip crystallization, increases the wind drying area and uniformity of polyester chip crystallization, but also improves the convenience of polyester chip crystallization discharge operation and control, thereby improving the drying quality and efficiency of polyester chip crystallization.

[0004] During the crystallization and drying of polyester chips, due to the different particle sizes of the materials, large particles gradually settle to the bottom of the drying equipment under the action of gravity, while small particles are suspended in the upper part of the material layer. This particle size gradation leads to differences in the drying rate in the vertical direction. The small particles in the upper layer complete surface moisture analysis first. Under the action of continuous hot air, the material in this area will prematurely enter the over-drying stage. As the drying continues, the small particles in the upper layer will cause local melting and bonding, resulting in defects in the crystallization appearance of the polyester chips, seriously restricting the stability of product quality. Summary of the Invention

[0005] The present invention provides a polyester chip crystallization drying device, which aims to solve the technical problem in the related art that due to the different particle sizes of materials, large particles of materials gradually settle to the bottom of the drying equipment under the action of gravity, while small particles of materials are suspended in the upper part of the material layer. As the drying continues, the small particles in the upper layer will be locally melted and bonded, thereby causing defects in the crystallization appearance of the polyester chips.

[0006] The polyester chip crystallization drying equipment of the present invention comprises a drying cylinder, which is provided with a feed port and an exhaust port, a discharge pipe and an air inlet pipe are further provided at the bottom of the drying cylinder, an annular cylinder is provided inside the drying cylinder, a closing plate with air holes is provided on the bottom of the annular cylinder and slides up and down, and a stratification module is further provided on the drying cylinder, and the stratification module comprises a bearing unit and a stratification unit; the bearing unit comprises a fixed cylinder fixed inside the drying cylinder, a lifting frame is provided on the outside of the fixed cylinder for vertical elastic sliding, the lower end of the lifting frame abuts against the annular cylinder, a communicating cavity is formed between the lifting frame and the drying cylinder, and a limiting plate is provided on the lifting frame which penetrates into the inner side of the fixed cylinder; the stratification unit comprises a The telescopic cylinder in the drying cylinder is composed of a plurality of telescopic units that slide vertically and elastically. A driving rod slides vertically in the telescopic cylinder, and the lower end of the driving rod extends to the bottom of the telescopic cylinder. A sliding cylinder slides vertically and elastically on the driving rod. A plurality of inclined isolation plates are provided on the circumferential direction of the sliding cylinder. The isolation plates are rotated on the sliding cylinder through elastic parts. When the isolation plates are rotated to a horizontal state, all the isolation plates form a closed disc structure. A pushing column is provided in the sliding cylinder, and a plurality of shielding plates with the same structure as the shielding plates are provided below the isolation plates and are rotated on the driving rod through elastic parts. The shielding plates are provided with rotating blocks, and the isolation plates have air holes.

[0007] Beneficial effect: When the small-particle material is close to being dry, the telescopic cylinder drives the drive rod to rise, and the four isolation plates abut against the corresponding four abutment parts. The four isolation plates gradually rotate to a horizontal state, forming a disc structure that lifts the top layer of small-particle material and separates it from the large-particle material below. At this time, the air holes on the isolation plates can still ensure that hot air can pass through, and finally the small-particle material above the isolation plates is dried. After the small-particle material above is completely dry, the telescopic cylinder continues to drive the drive rod to rise, and then the isolation plates abut against the limit plates, which drives the lifting frame to move upward. The lower end of the lifting frame disengages from the inclined section on the annular cylinder, so that the lower end of the connecting cavity is connected to the lower chamber. When the lifting frame reaches its limit, the drive rod continues to rise, forcing the isolation plate, the load-bearing plate, and the sliding cylinder to descend. When the push column descends and contacts all the rotating blocks, it can drive the rotating blocks to a horizontal state, and all the shielding plates rotate to a horizontal state. The four shielding plates form a disc structure with a diameter equal to the inner diameter of the fixed cylinder. The four shielding plates are located at the bottom of the fixed cylinder. The four shielding plates separate the upper layer of fully dried small particles from the large particles below, which are then contained in the lower chamber. When the small particles are close to drying, the upper layer of small particles is pre-lifted and separated from the large particles below, allowing the large particles below more space to "boil" and shortening the drying time of the large particles. When the upper layer of small particles is completely dry, the bottom of the small particles is completely sealed, and the hot air passes through the large particles below and enters the connecting chamber. Finally, it passes through the connecting chamber and is discharged from the exhaust port until the large particles below are completely dry. This can effectively prevent the small particles from being over-dried, not only improving work efficiency but also ensuring drying quality.

[0008] Preferably, a frame is provided on the outside of the drying cylinder, a vertically arranged track is provided on the frame, a lifting plate is vertically slidably installed on the track, a driving shaft is provided on the lifting plate, the driving shaft penetrates into the drying cylinder and is connected to the closing plate.

[0009] The effect is that the driving shaft is driven up and down by the lifting plate, so that the closing plate is lifted and lowered. After the material is dried, the closing plate is lowered to facilitate the discharge of the material.

[0010] Preferably, a first motor is fixedly mounted on the lifting plate, a driving shaft is fixedly mounted on an output end of the first motor, a stirring blade is further provided on the driving shaft, and the stirring blade is located below the closing plate.

[0011] The effect is that the stirring blades can stir the material in the discharge chamber to prevent material accumulation. Under the action of the stirring blades, the material is discharged smoothly through the discharge pipe, ensuring a smooth and efficient discharge process.

[0012] Preferably, the isolation plate includes an outer arc surface, two identical side surfaces and an inner plane. A rotating shaft is provided on the inner plane of the isolation plate, and the rotating shaft is rotatably mounted on the sliding cylinder.

[0013] The effect is that when the four isolation plates are rotated to a horizontal state, a closed disc structure can be formed to separate the materials.

[0014] Preferably, a telescopic cylinder is fixedly mounted on the upper surface of the drying cylinder, and the telescopic portion of the telescopic cylinder is connected to the driving rod.

[0015] Preferably, the telescopic cylinder is rotatably matched with the drying cylinder, a driven gear is fixed on the telescopic cylinder, the driven gear and the telescopic cylinder are coaxially arranged, a driving gear is rotatably mounted on the inner top wall of the drying cylinder, the driving gear is engaged with the driven gear, and a second motor is mounted on the upper surface of the drying cylinder, the output end of the second motor is connected to the driving gear, and the telescopic part of the telescopic cylinder is rotatably matched with the driving rod.

[0016] The effect is that the isolation plate and the shielding plate rotate, which can properly stir the material and ensure that the material can be fully dried. Preferably, the lower end of the telescopic cylinder is provided with a plurality of abutting portions along its circumference, and the plurality of abutting portions correspond one-to-one to the isolation plates respectively.

[0017] Preferably, the lifting frame is a cylindrical structure, and a top ring with an annular structure is provided on the upper surface of the lifting frame.

[0018] Preferably, the elastic member is a torsion spring.

[0019] Preferably, the bottom of the drying cylinder is a conical structure, and the inner side of the conical structure is a material discharge cavity.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are as follows: when the small-particle material is close to a dry state, the telescopic cylinder drives the driving rod to rise, and the four isolation plates abut against the corresponding four abutting parts. The four isolation plates gradually rotate to a horizontal state, and the four isolation plates form a disc structure, which lifts the top layer of small-particle material and separates it from the large-particle material below. At this time, the air holes on the isolation plates can still ensure that hot air can pass through, and finally the small-particle material above the isolation plates is dried. After the small-particle material above is completely dry, the telescopic cylinder continues to drive the driving rod to rise, and then the isolation plate abuts against the limit plate, and the limit plate drives the lifting frame to move upward. The lower end of the lifting frame is separated from the inclined section on the annular cylinder, so that the lower end of the connecting cavity is connected to the lower chamber. When the lifting frame reaches its limit, the drive rod continues to rise, forcing the isolation plate, the load-bearing plate, and the sliding cylinder to descend. When the push column descends and contacts all the rotating blocks, it can drive the rotating blocks to a horizontal state, and all the shielding plates rotate to a horizontal state. The four shielding plates form a disc structure with a diameter equal to the inner diameter of the fixed cylinder. The four shielding plates are located at the bottom of the fixed cylinder. The four shielding plates separate the upper layer of fully dried small particles from the large particles below, which are then contained in the lower chamber. When the small particles are close to drying, the upper layer of small particles is pre-lifted and separated from the large particles below, allowing the large particles below more space to "boil" and shortening the drying time of the large particles. When the upper layer of small particles is completely dry, the bottom of the small particles is completely sealed, and the hot air passes through the large particles below and enters the connecting chamber. Finally, it passes through the connecting chamber and is discharged from the exhaust port until the large particles below are completely dry. This can effectively prevent the small particles from being over-dried, not only improving work efficiency but also ensuring drying quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a cross-sectional view of the present invention.

[0023] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0024] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle.

[0025] Figure 5 For the present invention Figure 2 Enlarged view of point C in the middle.

[0026] Figure 6 For the present invention Figure 2 Enlarged view of point D in the middle.

[0027] Figure 7 It is an exploded schematic diagram of the fixed cylinder, the fixed cylinder and the drying cylinder of the present invention.

[0028] Figure 8 It is an exploded schematic diagram of the fixing cylinder and the lifting frame of the present invention.

[0029] Figure 9 It is an exploded schematic diagram of the telescopic cylinder, the driving rod and the sliding cylinder of the present invention.

[0030] Reference numerals: 10. Frame; 11. Drying cylinder; 12. Feeding chamber; 13. Lower chamber; 14. Upper chamber; 15. Feeding port; 16. Exhaust port; 17. Discharge pipe; 18. Inlet pipe; 19. Annular cylinder; 191. Inclined section; 20. Track; 21. Lifting plate; 22. First motor; 23. Drive shaft; 24. Closing plate; 25. Stirring blade; 30. Fixed cylinder; 31. Fixed bar; 32. Perforation; 33. Lifting frame; 34. Top ring; 35. First spring; 36. Limiting plate; 37. Connecting cavity; 40. Telescopic cylinder; 41. Abutment portion; 42. Telescopic cylinder; 43. Driving rod; 44. Mounting cavity; 45. Avoidance long hole; 50. Driven gear; 51. Driving gear; 52. Second motor; 60. Sliding cylinder; 61. Loading plate; 62. Tension spring; 63. Connecting seat; 64. Isolation plate; 65. Push column; 70. Shielding plate; 71. Rotating block. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figures 1 to 9 As shown, a specific embodiment of the polyester chip crystallization drying equipment of the present invention includes a carrying module, a discharge module and a layering module.

[0033] like Figure 1 and Figure 2 As shown, the supporting module includes a frame 10, a drying drum 11, an annular drum 19, an inclined section 191, a discharge pipe 17, and an air inlet pipe 18. The frame 10 is fixedly mounted on the ground, and the drying drum 11 is fixedly mounted on the frame 10. Reinforcing ribs are provided between the drying drum 11 and the frame 10 to ensure the stability of the drying drum 11 on the frame 10. The axis of the drying drum 11 extends vertically, and the bottom of the drying drum 11 has a tapered structure.

[0034] An annular cylinder 19 is fixedly mounted near the bottom of the drying cylinder 11. The annular cylinder 19 is coaxial with the drying cylinder 11, and its outer peripheral wall is fixed to the inner wall of the drying cylinder 11. The annular cylinder 19 is located above the conical structure at the bottom of the drying cylinder 11. The upper opening of the annular cylinder 19 has an open inclined section 191.

[0035] A lower chamber 13 is formed inside the annular cylinder 19, and an upper chamber 14 is formed above the annular cylinder 19. The conical part at the bottom of the drying cylinder 11 is the lower material chamber 12. The chambers inside the drying cylinder 11 are divided into the lower material chamber 12, the lower chamber 13 and the upper chamber 14 from bottom to top, and the lower material chamber 12, the lower chamber 13 and the upper chamber 14 are all connected. The diameter of the lower chamber 13 is smaller than the diameter of the upper chamber 14, and the circumferential edge between the lower chamber 13 and the upper chamber 14 is connected by an inclined section 191.

[0036] A feed port 15 is located near the top of the drying cylinder 11 and communicates with the upper chamber 14, facilitating the entry of material into the drying cylinder 11. An exhaust port 16 is also provided on the drying cylinder 11, also communicating with the upper chamber 14, for exhausting gases generated during the drying process. In this embodiment, the feed port 15 and exhaust port 16 are symmetrically positioned. A discharge pipe 17 is located at the tapered bottom of the drying cylinder 11 and communicates with the lower chamber 12, facilitating the discharge of dried material. The air inlet pipe 18 is arranged on the outer side wall of the conical part at the bottom of the drying cylinder 11, and the air inlet pipe 18 is connected to the discharge chamber 12. The air inlet pipe 18 is connected to an air supply source, such as a hot air blower, etc. The heat source introduces hot air into the drying cylinder 11 through the air inlet pipe 18. The hot air enters the discharge chamber 12 through the air inlet pipe 18. The hot air surges upward and gradually rises to the lower chamber 13 and the upper chamber 14. The hot air will pass through the material in turn, gradually heat the material, and promote crystallization and drying.

[0037] Specifically, the material is dried within the lower chamber 13 and the upper chamber 14. Once dried, it falls into the discharge chamber 12 and is discharged through the discharge pipe 17, as described in detail below. A control valve (not shown) is located at the outlet of the discharge pipe 17 to adjust the material discharge rate as needed. Furthermore, the outer wall of the drying cylinder 11 is covered with insulating material to minimize heat loss. The hot air temperature of the air inlet pipe 18 is adjustable to suit different material requirements.

[0038] like Figure 2 and Figure 7As shown, the discharge module includes a track 20, a lifting plate 21, a first motor 22, a drive shaft 23, a sealing plate 24, and a stirring blade 25. Tracks 20 are provided on both opposing front and rear sides of the frame 10. Tracks 20 are vertically arranged, and the lifting plate 21 is mounted on the track 20 for vertical sliding movement. A drive element (not shown) is mounted on the track 20 to drive the lifting plate 21 upward and downward. The drive element can be a cylinder or a motor, and can drive the lifting plate 21 to rise and fall smoothly on the track 20. It is particularly important to note that in this embodiment, the lifting plate 21 is located below the drying cylinder 11.

[0039] A first motor 22 is fixedly mounted on the upper surface of the lifting plate 21. The axis of the output shaft of the first motor 22 extends vertically. A drive shaft 23 is fixedly connected to the output shaft of the first motor 22. The drive shaft 23 extends upward into the interior of the drying cylinder 11. In this embodiment, the drive shaft 23 passes through the discharge pipe 17 and forms a sealed sliding fit between the drive shaft 23 and the discharge pipe 17. A sealing plate 24 is fixedly mounted on the upper end of the drive shaft 23. The sealing plate 24 is perpendicular to the drive shaft 23 and forms a material blocking surface. It is particularly important to emphasize that the sealing plate 24 is a circular structure and is located at the bottom of the lower chamber 13. In other words, the sealing plate 24 separates the lower chamber 13 from the discharge chamber 12.

[0040] It should be noted that the closing plate 24 is located at the bottom of the annular cylinder 19 and is in sealed sliding engagement with the inner wall of the annular cylinder 19. That is, the outer peripheral wall of the closing plate 24 abuts the inner wall of the annular cylinder 19. When the material to be dried enters the drying cylinder 11 through the feed port 15, the closing plate 24 can support the material. The closing plate 24 is provided with air holes extending vertically therethrough, the diameter of the air holes being smaller than the particle size of the material. That is, the air holes on the closing plate 24 can ensure that the hot air entering the discharge chamber 12 from the air inlet pipe 18 passes through the closing plate 24, drying the material as the hot air passes through it.

[0041] When the polyester chip crystallization material in the lower chamber 13 and the upper chamber 14 completes the drying work, the lifting plate 21 drives the drive shaft 23 to descend along the track 20, so that the closing plate 24 descends and leaves the bottom of the annular cylinder 19, that is, the opening at the bottom of the annular cylinder 19 is opened, and all the polyester chip crystallization materials in the lower chamber 13 and the upper chamber 14 fall into the inside of the discharge chamber 12, and then the polyester chip crystallization materials are discharged from the discharge pipe 17.

[0042] A stirring blade 25 is provided below the closing plate 24. The stirring blade 25 is fixedly mounted on the drive shaft 23. There are multiple stirring blades 25, which are circumferentially fixed on the drive shaft 23 and rotate with the drive shaft 23. That is, the stirring blade 25 is located in the discharge chamber 12. The stirring blade 25 can stir the material in the discharge chamber 12 to prevent material accumulation. The material is discharged smoothly through the discharge pipe 17 under the action of the stirring blade 25, ensuring a smooth and efficient discharge process.

[0043] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 as well as Figure 9 As shown, the layered module includes a carrying unit and a layered unit.

[0044] The carrying unit includes a fixing cylinder 30 , a fixing bar 31 , a lifting frame 33 , a top ring 34 , a first spring 35 and a limiting plate 36 .

[0045] A fixed cylinder 30 is fixedly installed in the upper chamber 14. The inner diameter of the fixed cylinder 30 is the same as that of the annular cylinder 19. The fixed cylinder 30 is a structure with openings at both ends. The fixed cylinder 30 is coaxial with the drying cylinder 11. A fixed bar 31 is fixedly installed on the outer wall of the fixed cylinder 30. The fixed bar 31 is a rectangular strip structure, and one is symmetrically provided on the front and rear side walls of the fixed cylinder 30. The length of the fixed bar 31 extends in the vertical direction. The fixed bar 31 is fixedly connected to the inner wall of the drying cylinder 11, so that the fixed cylinder 30 is fixedly installed on the drying cylinder 11, ensuring the stability of the fixed cylinder 30. There is a certain distance between the bottom of the fixed cylinder 30 and the annular cylinder 19, and the upper end of the fixed cylinder 30 is lower than the height of the feed port 15 and the exhaust port 16. A through hole 32 is opened on the left and right side walls of the fixed cylinder 30. The through hole 32 is located near the lower end of the fixed cylinder 30.

[0046] The outside of the fixed cylinder 30 is fitted with a lifting frame 33 that slides up and down. The lifting frame 33 is a cylindrical structure, and the diameter of the lifting frame 33 is smaller than the inner diameter of the drying cylinder 11. A top ring 34 is provided on the upper surface of the lifting frame 33. The top ring 34 is annular in structure, and a first spring 35 is provided on the upper surface of the top ring 34. One end of the first spring 35 is fixed to the top ring 34, and the other end is connected to the drying cylinder 11. The first spring 35 provides elastic force for the reset of the lifting frame 33. Through holes are provided at the front and back of the lifting frame 33, and the front and rear fixing bars 31 are respectively fixedly connected to the inner wall of the drying cylinder 11 through the corresponding through holes. In the initial state, the lower end of the lifting frame 33 abuts against the inclined section 191 on the annular cylinder 19, and a connecting cavity 37 (such as Figure 5 As shown), the communicating cavity 37 has an annular structure.

[0047] A limit plate 36 is provided on each of the inner sidewalls of the lifting frame 33. Both limit plates 36 are arranged horizontally, corresponding to the left and right through-holes 32 on the fixed cylinder 30. The limit plates 36 extend through the corresponding through-holes 32 on each side and into the interior of the fixed cylinder 30. When the limit plates 36 are pushed upward, they drive the lifting frame 33 upward, compressing the first spring 35. The lower end of the lifting frame 33 disengages from the inclined section 191 on the annular cylinder 19, allowing the lower end of the connecting chamber 37 to communicate with the lower chamber 13. The distance the limit plates 36 move is determined by the height of the through-holes 32, ensuring the stable ascent of the lifting frame 33. When the limit plates 36 return to their original position, the lifting frame 33 re-engages the inclined section 191, and the lower end of the connecting chamber 37 returns to its closed state.

[0048] The layered unit includes a telescopic cylinder 40, an abutment portion 41, a telescopic cylinder 42, a driving rod 43, a driven gear 50, a driving gear 51, a second motor 52, a sliding cylinder 60, a supporting plate 61, a tension spring 62, a connecting seat 63, an isolation plate 64, a push column 65, a shielding plate 70 and a rotating block 71.

[0049] A telescopic cylinder 40 is rotatably mounted on the top wall of the drying cylinder 11. This hollow cylinder 40 has an opening at its lower end. It is coaxial with the drying cylinder 11 and consists of multiple telescopic units that slide vertically together. Springs (not shown) are interposed between the units to provide elastic force for their repositioning. Four square abutments 41 are located along the lower end of the cylinder 40.

[0050] like Figure 3 As shown, a driven gear 50 is provided near the top of the telescopic cylinder 40, and the driven gear 50 is coaxially arranged with the telescopic cylinder 40. A driving gear 51 is rotatably mounted on the inner top wall of the drying cylinder 11, and the driving gear 51 is engaged with the driven gear 50. A second motor 52 is installed on the upper surface of the drying cylinder 11, and the output end of the second motor 52 is connected to the driving gear 51, so that the second motor 52 drives the driven gear 50 to rotate through the driving gear 51, thereby driving the telescopic cylinder 40 to rotate.

[0051] A telescopic cylinder 42 is fixedly mounted on the upper surface of the drying cylinder 11. The axis of the telescopic portion of the telescopic cylinder 42 extends vertically, and the telescopic portion of the telescopic cylinder 42 penetrates downward into the interior of the drying cylinder 11. A drive rod 43 is rotatably mounted on the telescopic portion of the telescopic cylinder 42. The drive rod 43 is located inside the drying cylinder 11 and is coaxially arranged with the drying cylinder 11. In this embodiment, the drive rod 43 slides vertically with the drying cylinder 11.

[0052] The lower end of the driving rod 43 extends to the bottom of the telescopic cylinder 40. The driving rod 43 has a mounting cavity 44 near the bottom. The outer wall of the mounting cavity 44 is provided with four avoidance long holes 45 along its circumference (such as Figure 9 As shown), the length of the avoidance slot 45 extends in the vertical direction.

[0053] The outer side of the driving rod 43 is fitted with a sliding cylinder 60 along its axial sliding direction. The sliding cylinder 60 is located below the telescopic cylinder 40. A horizontally arranged supporting plate 61 is provided on the inner side of the sliding cylinder 60. The supporting plate 61 is located inside the mounting cavity 44. A tension spring 62 is provided on the upper surface of the supporting plate 61. One end of the tension spring 62 is fixedly connected to the supporting plate 61, and the other end is connected to the driving rod 43. The tension spring 62 can provide elastic force for the reset of the supporting plate 61.

[0054] like Figure 6 As shown, four connecting seats 63 are provided on the circumference of the supporting plate 61, and the connecting seats 63 correspond to the avoidance long holes 45 one by one, and the connecting seats 63 pass through the corresponding avoidance long holes 45 and are fixedly connected to the inner wall of the sliding cylinder 60, so that the sliding cylinder 60 can be lifted and lowered together with the supporting plate 61.

[0055] Isolation plates 64 are rotatably mounted on the four connecting seats 63. The isolation plates 64 are connected to the connecting seats 63 via a rotating shaft, and the axis of the rotating shaft extends in the horizontal direction. A torsion spring is provided on the rotating shaft, one end of the torsion spring is connected to the rotating shaft, and the other end is connected to the connecting seat 63. The torsion spring can keep the isolation plates 64 in an inclined state, that is, in the initial state, the isolation plates 64 are all in an inclined state (such as Figure 9 As shown), the isolation panel 64 can be switched between a horizontal state and an inclined state.

[0056] Each isolation plate 64 is covered with ventilation holes. Similar to the ventilation holes on the sealing plate 24, these holes allow hot air to pass through but prevent material particles from passing through. The isolation plate 64 comprises an outer curved surface, two identical side surfaces, and an inner flat surface. The rotating shaft is fixedly mounted on the inner surface of the isolation plate 64. When all four isolation plates 64 are horizontal, the side panels of adjacent isolation plates 64 abut against each other, forming a circular disc structure with a diameter equal to the inner diameter of the fixed cylinder 30.

[0057] The bottom of the supporting plate 61 is also fixedly mounted with a push column 65, which is arranged vertically. Four shielding plates 70 are also provided below the isolation plate 64. The shielding plates 70 have the same structure as the isolation plate 64, but the difference is that there is no air vent on the shielding plates 70. A rotating shaft is provided on the inner plane of the shielding plates 70, and the rotating shaft is horizontally rotated and mounted on the driving rod 43. A torsion spring is provided on the rotating shaft, one end of the torsion spring is connected to the rotating shaft, and the other end is connected to the driving rod 43, which also keeps the shielding plates 70 in an inclined state. That is, in the initial state, the shielding plates 70 are all in an inclined state (such as Figure 9 The partition plate 64 can be switched between a horizontal state and an inclined state.

[0058] A rotating block 71 is fixedly installed at the end of the rotating shaft of the baffle plate 70, and the rotating block 71 has the same inclination angle as the baffle plate 70. When the push column 65 descends and abuts against all the rotating blocks 71, it can drive the rotating block 71 to rotate to a horizontal state, thereby making all the baffle plates 70 rotate to a horizontal state. Similarly, when the four baffle plates 70 are all in a horizontal state, the side panels of the two adjacent baffle plates 70 fit together, so that the four baffle plates 70 form a disc structure, and the diameter of the disc is the same as the inner diameter of the fixed cylinder 30.

[0059] During operation, the material to be dried is added to the drying drum 11 through the feed port 15. The material will fall above the sealing plate 24, that is, the material is located in the lower chamber 13 and the upper chamber 14. Then, hot air is introduced into the drying drum 11 through the air inlet pipe 18. The hot air passes through the sealing plate 24 and enters the lower chamber 13 and the upper chamber 14. As the hot air passes through the material, it dries the material, and the material will continue to "boil" inside the drying drum 11. The second motor 52 drives the driven gear 50 to rotate through the driving gear 51, driving the telescopic cylinder 40 to rotate. The telescopic cylinder 40 drives the drive rod 43 to rotate, thereby rotating the isolation plate 64 and the baffle 70, which can properly stir the material and ensure that the material is fully dried. It is particularly noted that the rotation speed of the isolation plate 64 and the baffle 70 does not need to be particularly fast. Large particles gradually settle to the bottom of the drying equipment under the action of gravity, while small particles are suspended in the upper part of the material layer.

[0060] After drying for a period of time, the small-particle material on the upper part of the material layer will first approach a dry state, and the telescopic cylinder 42 drives the driving rod 43 to rise, and the isolation plate 64 rises together with the driving rod 43 until the four isolation plates 64 abut against the corresponding four abutting parts 41. Since springs are connected between the telescopic units on the telescopic cylinder 40, and the elastic force of the spring on the telescopic cylinder 40 is greater than the elastic force of the torsion spring on the isolation plate 64, as the isolation plate 64 rises, the four isolation plates 64 gradually rotate to a horizontal state, and the four isolation plates 64 form a disc structure, which lifts the top layer of small-particle material and separates it from the large-particle material below, so that the large-particle material below has more "boiling" space, shortening the drying time of the large-particle material. At this time, the air vents on the isolation plate 64 can still ensure that hot air passes through, and finally the small-particle material above the isolation plate 64 is dried.

[0061] After the small-size material above is completely dried, the telescopic cylinder 42 continues to drive the driving rod 43 to rise, and the various telescopic units on the telescopic cylinder 40 are compressed. Then the isolation plate 64 abuts against the limit plate 36. When the limit plate 36 is pushed upward, the limit plate 36 drives the lifting frame 33 to move upward, the first spring 35 is compressed, and the lower end of the lifting frame 33 is disengaged from the inclined section 191 on the annular cylinder 19, so that the lower end of the communicating cavity 37 is connected to the lower chamber 13. When the lifting frame 33 moves to the extreme position, the driving rod 43 continues to rise, the isolation plate 64, the supporting plate 61 and the sliding cylinder 60 are forced to descend, the tension spring 62 is stretched, and the push column 65 descends and abuts against all the rotating blocks 71, which can drive the rotating blocks 71 to rotate to a horizontal state, thereby making all the baffles 70 rotate to a horizontal state. When the four baffles 70 are all in a horizontal state, the side plates of the two adjacent baffles 70 fit together, so that the four baffles 70 form a disc structure, and the diameter of the disc is the same as the inner diameter of the fixed cylinder 30, and the four baffles 70 are just located at the bottom position of the fixed cylinder 30. The four baffles 70 separate the small-sized particles that have been completely dried in the upper layer from the large-sized particles below, and the large-sized particles below are in the lower chamber 13.

[0062] The hot air passes through the large particles below and enters the communication chamber 37, and finally passes through the communication chamber 37 and is discharged from the exhaust port 16 until the large particles below are completely dried, effectively preventing the small particles above from being excessively dried.

[0063] When the polyester chip crystallization material in the lower chamber 13 and the upper chamber 14 is dried, the lifting plate 21 drives the drive shaft 23 to descend along the track 20, so that the closing plate 24 descends and leaves the bottom of the annular cylinder 19. That is, the opening at the bottom of the annular cylinder 19 is opened, and all the polyester chip crystallization material in the lower chamber 13 and the upper chamber 14 falls into the discharge chamber 12, and then the polyester chip crystallization material is discharged from the discharge pipe 17. The stirring blade 25 can stir the material in the discharge chamber 12 to prevent material accumulation. Under the action of the stirring blade 25, the material is smoothly discharged through the discharge pipe 17, ensuring a smooth and efficient discharge process.

[0064] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A polyester chip crystallization drying device comprising: The drying cylinder has a feed port and an exhaust port, and a discharge pipe and an air inlet pipe are also provided at the bottom of the drying cylinder. The drying cylinder is characterized in that an annular cylinder is provided inside the drying cylinder, and a closing plate with air holes is slid up and down at the bottom of the annular cylinder. The drying cylinder is also provided with a stratification module, which includes a carrying unit and a stratification unit. The carrying unit includes a fixed cylinder fixed in the drying cylinder, a lifting frame is vertically elastically slidable on the outside of the fixed cylinder, the lower end of the lifting frame abuts against the annular cylinder, a connecting cavity is formed between the lifting frame and the drying cylinder, and a limiting plate is provided on the lifting frame to penetrate into the inner side of the fixed cylinder; The stratification unit includes a telescopic cylinder arranged in the drying cylinder, and the telescopic cylinder is composed of a plurality of telescopic units that slide vertically and elastically. A driving rod slides vertically in the telescopic cylinder, and the lower end of the driving rod extends to the bottom of the telescopic cylinder. A sliding cylinder slides vertically and elastically on the driving rod. A plurality of inclined isolation plates are provided on the sliding cylinder in a circumferential direction. The isolation plates are rotated on the sliding cylinder through elastic parts. When the isolation plates are rotated to a horizontal state, all the isolation plates form a closed disc structure. A pushing column is provided in the sliding cylinder, and a plurality of shielding plates with the same structure as the isolation plates are provided below the isolation plates and are rotated on the driving rod through elastic parts. The shielding plates are provided with rotating blocks, and the isolation plates have air holes.

2. A polyester chip crystallization drying equipment according to claim 1, characterized in that, A frame is provided outside the drying cylinder, a vertically arranged track is provided on the frame, a lifting plate is vertically slidably installed on the track, a driving shaft is provided on the lifting plate, and the driving shaft penetrates into the drying cylinder and is connected to the closing plate.

3. A polyester chip crystallization drying equipment according to claim 2, characterized in that, The lifting plate is fixedly mounted with a first motor, a driving shaft is fixedly mounted on an output end of the first motor, and a stirring blade is further provided on the driving shaft, and the stirring blade is located below the closing plate.

4. The polyester chip crystallization drying equipment according to claim 1, characterized in that: The isolation plate includes an outer arc surface, two identical side surfaces and an inner plane. A rotating shaft is provided on the inner plane of the isolation plate, and the rotating shaft is rotatably mounted on the sliding cylinder.

5. The polyester chip crystallization drying equipment according to claim 1, characterized in that: A telescopic cylinder is fixedly installed on the upper surface of the drying cylinder, and the telescopic part of the telescopic cylinder is connected to the driving rod.

6. The polyester chip crystallization drying equipment according to claim 5, characterized in that: The telescopic cylinder is rotatably matched with the drying cylinder. A driven gear is fixed on the telescopic cylinder. The driven gear and the telescopic cylinder are coaxially arranged. A driving gear is rotatably mounted on the inner top wall of the drying cylinder. The driving gear is engaged with the driven gear. A second motor is mounted on the upper surface of the drying cylinder. The output end of the second motor is connected to the driving gear. The telescopic part of the telescopic cylinder is rotatably matched with the driving rod.

7. A polyester chip crystallization drying device according to any one of claims 1 to 6, characterized in that: The lower end of the telescopic cylinder is provided with a plurality of abutting portions along its circumference, and the plurality of abutting portions correspond to the isolation plates one by one.

8. The polyester chip crystallization drying equipment according to claim 7, characterized in that: The lifting frame is a cylindrical structure, and a top ring with an annular structure is provided on the upper surface of the lifting frame.

9. The polyester chip crystallization drying equipment according to claim 8, characterized in that: The elastic member is a torsion spring.

10. The polyester chip crystallization drying equipment according to claim 1, characterized in that: The bottom of the drying cylinder is a conical structure, and the inner side of the conical structure is a material discharge cavity.

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