A polyester chip crystallization drying device

Abstract

The present application relates to the technical field of drying equipment, and discloses a polyester chip crystallization drying equipment, which comprises a drying cylinder, a feeding port and an exhaust port are arranged on 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, a closed plate with air holes is arranged on the bottom of the annular cylinder and can slide up and down, a layered module is further arranged on the drying cylinder, and the layered module comprises a bearing unit and a layering unit; the bearing unit comprises a fixed cylinder which is 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 communication cavity is formed between the lifting frame and the drying cylinder. The polyester chip crystallization drying equipment has the beneficial effects that when the small-particle-size material on the upper layer is completely dried, the bottom of the small-particle-size material is completely closed, hot air passes through the large-particle-size material below and then enters the communication cavity, and finally is discharged from the exhaust port, until the large-particle-size material below is completely dried, so that the small-particle-size material can be effectively prevented from being excessively dried.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of drying equipment, in particular to a polyester chip crystallization drying equipment. BACKGROUND

[0002] Polyester chips generally refer to polyester raw materials obtained by polymerization and generally processed into about 4*5*2 millimeter flaky particles. The process route of polyester production includes direct esterification and ester exchange. The PTA method has the advantages of low raw material consumption and short reaction time, and has become the main process and the preferred technical route of polyester since the 1980s. A large-scale production line is a continuous production process, and a semi-continuous and intermittent production process is suitable for medium and small production devices. The use of polyester includes fibers, various containers, packaging materials, films, films, engineering plastics and other fields. The performance of pet film is affected by the moisture of polyester chip crystallization. Therefore, a fluidized bed is used for drying the moisture of polyester chip crystallization. Therefore, a polyester chip crystallization drying equipment is provided.

[0003] A polyester chip crystallization drying equipment for a PET film production line is disclosed in Chinese Patent No. CN221881994U, which comprises a base and a support plate. The top end of the base is provided with a support plate. One end of the support plate is provided with a turnover shaft, and the support plate is movably connected to the base through the turnover shaft. A rotating motor is installed at the top end of the support plate. The output end of the rotating motor is provided with a rotating shaft. The surface of the rotating shaft is provided with a gear. The patent not only realizes convenient feeding and rotary drying of polyester chip crystallization, facilitates efficient tumbling rotation driving of polyester chip crystallization, avoids damage to polyester chip crystallization caused by local high temperature, increases the wind drying area and uniformity of polyester chip crystallization, and improves the convenience of polyester chip crystallization discharge operation control, and improves the drying quality and efficiency of polyester chip crystallization.

[0004] During the drying of polyester chip crystallization, due to the different particle sizes of the materials, large particle materials gradually settle to the bottom of the drying equipment under the action of gravity, while small particle materials are suspended in the upper part of the material layer. This particle size grading leads to differences in drying rate in the vertical direction. The small particles in the upper layer are first completed. The surface water is analyzed, and under the action of continuous hot air, the materials in this area will enter the over-drying stage too early, which will cause the small particles in the upper layer to be locally melted and bonded during continuous drying, thereby causing appearance defects of polyester chip crystallization and seriously affecting the stability of product quality. SUMMARY

[0005] This invention provides a polyester chip crystallization drying device, which aims to solve the technical problem in related technologies where, due to the different particle sizes of the materials, large particles gradually sink to the bottom of the drying device under gravity, while small particles remain suspended in the upper part of the material layer. As drying continues, the small particles in the upper layer will cause local melting and agglomeration, resulting in appearance defects in the crystallized polyester chips.

[0006] This invention discloses a polyester chip crystallization and drying device, comprising a drying cylinder with an inlet and an outlet, a discharge pipe and an air inlet at the bottom of the drying cylinder, an annular cylinder inside the drying cylinder, a closed plate with perforated holes sliding vertically at the bottom of the annular cylinder, and a layering module on the drying cylinder, comprising a support unit and layering units; the support unit includes a fixed cylinder fixed inside the drying cylinder, a lifting frame vertically and elastically sliding on the outside of the fixed cylinder, the lower end of the lifting frame abutting against the annular cylinder, a communicating cavity being formed between the lifting frame and the drying cylinder, and a limiting plate extending into the inside of the fixed cylinder on the lifting frame; the layering units include... The telescopic cylinder inside the drying cylinder is composed of multiple telescopic units that slide vertically and elastically. A drive rod slides vertically inside the telescopic cylinder, with its lower end extending below the telescopic cylinder. A sliding cylinder slides vertically and elastically on the drive rod. The sliding cylinder has multiple inclined isolation plates circumferentially arranged. The isolation plates rotate on the sliding cylinder via elastic elements. When the isolation plates rotate to a horizontal state, all the isolation plates form a closed disc structure. A push column is provided inside the sliding cylinder. Below the isolation plates are multiple baffles with the same structure, which rotate on the drive rod via elastic elements. Each baffle is equipped with a rotating block, and the isolation plates have ventilation holes.

[0007] Beneficial effect: when the small particle size material approaches the dry state, the telescopic air cylinder drives the driving rod to rise, the four isolation plates abut against the corresponding four abutment parts, the four isolation plates gradually rotate to the horizontal state, the four isolation plates form a disc structure, the uppermost layer of small particle size material is lifted and separated from the lower large particle material, at this time, the air holes on the isolation plate can still ensure that the hot air passes through, and finally the small particle size material above the isolation plate is dried. After the small particle size material above is completely dried, the telescopic air cylinder continues to drive the driving rod to rise, and then the isolation plate abuts against the limiting plate, the limiting plate drives the lifting frame to move upwards, the lower end of the lifting frame is separated from the inclined section on the annular cylinder, so that the lower end of the communication cavity is communicated with the lower chamber. When the lifting frame moves to the limit position, the driving rod continues to rise, the isolation plate and the bearing plate and the sliding cylinder are forced to descend, and when the push rod abuts against all the rotating blocks, the rotating blocks are driven to rotate to the horizontal state, all the shielding plates are rotated to the horizontal state, and the four shielding plates form a disc structure. The diameter of the disc is the same as the inner diameter of the fixed cylinder, and the four shielding plates are located at the bottom of the fixed cylinder. The four shielding plates separate the completely dried small particle size material on the upper layer from the large particle material below, and the large particle material below is in the lower chamber. When the small particle size material approaches the dry state, the upper layer of small particle size material is lifted and separated from the lower large particle material in advance, so that the lower large particle material has more "boiling" space, and the drying time of the large particle material is shortened. When the upper layer of small particle size material is completely dried, the bottom of the small particle size material is completely closed, the hot air passes through the lower large particle material and enters the communication cavity, and finally it is discharged from the exhaust port after passing through the communication cavity. Until the lower large particle material is completely dried, the small particle size material can be effectively prevented from being over-dried, which not only improves the work efficiency, but also ensures the drying quality.

[0008] Preferably, a rack is arranged outside the drying cylinder, vertical tracks are arranged on the rack, a lifting plate is vertically slidably installed on the tracks, a driving shaft is arranged on the lifting plate, and the driving shaft penetrates into the drying cylinder and is connected with the closure plate.

[0009] Its effect is that the driving shaft is lifted by the lifting plate, so that the closure plate is lifted, and after the material is completely dried, the closure plate is lowered, facilitating the discharge of the material.

[0010] Preferably, a first motor is fixedly installed on the lifting plate, the driving shaft is fixedly installed on the output end of the first motor, stirring blades are further arranged on the driving shaft, and the stirring blades are located below the closure plate.

[0011] Its effect is that the stirring blades can stir the material in the discharging cavity, prevent the material from accumulating, and ensure that the material is smoothly discharged through the discharge pipe, ensuring smooth and efficient discharging process.

[0012] Preferably, the isolation plate comprises an outer arc surface, two identical side surfaces and an inner flat surface, and the inner flat surface of the isolation plate is provided with a rotating shaft which is rotatably installed on the sliding cylinder.

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

[0014] Preferably, the upper surface of the drying cylinder is fixedly provided with a telescopic cylinder, and the telescopic part of the telescopic cylinder is connected with a driving rod.

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

[0016] Its effect lies in that the isolation plate and the shielding plate are rotated to appropriately stir the materials, and the materials can be fully dried.

[0017] Preferably, the lower end of the telescopic cylinder is provided with a plurality of abutting parts along the circumference thereof, and the plurality of abutting parts are respectively one-to-one corresponding to the isolation plates.

[0018] Preferably, the lifting frame is in a cylindrical structure, and the upper surface of the lifting frame is provided with a top ring in an annular structure.

[0019] Preferably, the elastic member is a torsion spring.

[0020] Preferably, the bottom of the drying cylinder is in a conical structure, and the inside of the conical structure is a discharging cavity.

[0021] The beneficial effects of the present application are as follows: when the small-particle material is close to a dry state, the telescopic air cylinder drives the driving rod to rise, the four isolation plates abut against the corresponding four abutting parts, the four isolation plates are gradually rotated to a horizontal state, the four isolation plates form a disc structure, the uppermost layer of small-particle material is lifted and separated from the lower large-particle material, at this time, the air holes on the isolation plates can still ensure that the hot air passes through, and finally the small-particle material above the isolation plates is dried. After the small-particle material above is completely dried, the telescopic air cylinder continues to drive the driving rod to rise, then the isolation plates abut against the limiting plates, the limiting plates drive 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 communication cavity is communicated with the lower chamber. When the lifting frame moves to the limit position, the driving rod continues to rise, the isolation plates, the bearing plate and the sliding cylinder are forced to descend, when the push column abuts against all the rotating blocks, the rotating blocks are driven to rotate to a horizontal state, all the shielding plates are rotated to a horizontal state, the four shielding plates form a disc structure, the diameter of the disc is the same as the inner diameter of the fixed cylinder, and the four shielding plates are located at the bottom position of the fixed cylinder, the four shielding plates isolate the uppermost layer of completely dried small-particle material from the lower large-particle material, and the lower large-particle material is in the lower chamber. When the small-particle material is close to a dry state, the uppermost layer of small-particle material is lifted and separated from the lower large-particle material in advance, so that the lower large-particle material has more "boiling" space, and the drying time of the large-particle material is shortened, when the uppermost layer of small-particle material is completely dried, the bottom of the small-particle material is completely closed, the hot air passes through the lower large-particle material and enters the communication cavity, and finally the hot air is discharged from the exhaust port after passing through the communication cavity, until the lower large-particle material is completely dried, the small-particle material can be effectively prevented from being over-dried, the working efficiency is improved, and the drying quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0023] Figure 2 It is a sectional view of the present application.

[0024] Figure 3 It is a schematic diagram of the present application. Figure 2 It is an enlarged view of position A in the present application.

[0025] Figure 4 It is a schematic diagram of the present application. Figure 2 It is an enlarged view of position B in the present application.

[0026] Figure 5 It is an enlarged view of position C in the present application. Figure 2

[0027] Figure 6 It is an enlarged view of position D in the present application. Figure 2 ​​

[0028] Figure 7 Figure 6 is an exploded view of the fixed cylinder, the fixed cylinder and the drying cylinder of the present application.

[0029] Figure 8 Figure 7 is an exploded view of the fixed cylinder and the lifting frame of the present application.

[0030] Figure 9 Figure 8 is an exploded view of the telescopic cylinder, the driving rod and the sliding cylinder of the present application.

[0031] Reference signs:

[0032] 10, rack; 11, drying cylinder; 12, discharging cavity; 13, lower cavity; 14, upper cavity; 15, feeding port; 16, exhaust port; 17, discharging pipe; 18, air inlet pipe; 19, annular cylinder; 191, inclined section; 20, track; 21, lifting plate; 22, first motor; 23, driving shaft; 24, closing plate; 25, stirring blade; 30, fixed cylinder; 31, fixed strip; 32, perforation; 33, lifting frame; 34, top ring; 35, first spring; 36, limiting plate; 37, communication cavity; 40, telescopic cylinder; 41, abutting portion; 42, telescopic air cylinder; 43, driving rod; 44, mounting cavity; 45, avoiding long hole; 50, driven gear; 51, driving gear; 52, second motor; 60, sliding cylinder; 61, bearing plate; 62, tension spring; 63, connecting seat; 64, isolation plate; 65, push column; 70, shielding plate; 71, rotating block. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0034] As shown in Figures 1 to 9 , a specific embodiment of a polyester chip crystallization drying equipment of the present application comprises a bearing module, a discharging module and a layering module.

[0035] As shown in Figure 1 and Figure 2 , the bearing module comprises a rack 10, a drying cylinder 11, an annular cylinder 19, an inclined section 191, a discharging pipe 17 and an air inlet pipe 18. The rack 10 is fixedly installed on the ground, the drying cylinder 11 is fixedly installed on the rack 10, and reinforcing ribs are arranged between the drying cylinder 11 and the rack 10 to ensure the stability of the installation of the drying cylinder 11 on the rack 10. The axis of the drying cylinder 11 extends in the vertical direction, and the bottom of the drying cylinder 11 is in a conical structure.

[0036] The annular cylinder 19 is fixedly installed inside the drying cylinder 11 near the bottom, is coaxially arranged with the drying cylinder 11, the outer peripheral wall of the annular cylinder 19 is fixed to the inner wall of the drying cylinder 11, and the annular cylinder 19 is located above the conical structure of the bottom of the drying cylinder 11. The upper end opening of the annular cylinder 19 is provided with an inclined section 191 in an open structure.

[0037] The inside of the annular cylinder 19 forms a lower chamber 13, the upper part of the annular cylinder 19 is an upper chamber 14, the conical part of the bottom of the drying cylinder 11 is a discharging chamber 12, and the chambers inside the drying cylinder 11 are sequentially divided into the discharging chamber 12, the lower chamber 13 and the upper chamber 14 from bottom to top, and the discharging chamber 12, the lower chamber 13 and the upper chamber 14 are all communicated, the diameter of the lower chamber 13 is smaller than that of the upper chamber 14, and the circumferential edge between the lower chamber 13 and the upper chamber 14 is connected through the inclined section 191.

[0038] The drying cylinder 11 is provided with a feeding port 15 near the top, the feeding port 15 is communicated with the upper chamber 14, so that the material can enter the inside of the drying cylinder 11. The drying cylinder 11 is also provided with an exhaust port 16, which is also communicated with the upper chamber 14, for discharging the gas generated in the drying process. In the embodiment, the feeding port 15 and the exhaust port 16 are symmetrically arranged on the left and right. The conical bottom of the drying cylinder 11 is provided with a discharging pipe 17, which is communicated with the discharging chamber 12, so that the dried material can be discharged. The air inlet pipe 18 is arranged on the outer side wall of the conical part of the bottom of the drying cylinder 11, and the air inlet pipe 18 is communicated with the discharging chamber 12. The air inlet pipe 18 is communicated with a gas source, such as a hot air blower, and the heat source enters the inside of the drying cylinder 11 through the air inlet pipe 18. The hot air enters the discharging chamber 12 through the air inlet pipe 18, and 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 sequence, gradually heating the material and promoting crystallization drying.

[0039] It is particularly pointed out that the material will be dried in the lower chamber 13 and the upper chamber 14, and after drying, it will fall into the discharging chamber 12 and then be discharged through the discharging pipe 17, which will be described in detail later. The outlet of the discharging pipe 17 is provided with a control valve (not shown in the figure), which can adjust the discharging speed of the material according to needs. In addition, the outer wall of the drying cylinder 11 is covered with heat preservation material to reduce heat loss. The temperature of the hot air of the air inlet pipe 18 can be adjusted to meet the needs of different materials.

[0040] As Figure 2 With Figure 7As shown, the discharging module comprises a track 20, a lifting plate 21, a first motor 22, a driving shaft 23, a closing plate 24 and stirring blades 25. The track 20 is vertically arranged on each of the opposite sides of the frame 10, and the lifting plate 21 is vertically and slidingly installed on the track 20. A driving member (not shown in the figure) for driving the lifting plate 21 to lift is installed on the track 20, which can be a cylinder or a motor. The driving member can drive the lifting plate 21 to lift stably on the track 20. It is particularly pointed out that, in the embodiment, the lifting plate 21 is located below the drying cylinder 11.

[0041] The first motor 22 is fixedly installed on the upper surface of the lifting plate 21, the output shaft of the first motor 22 extends along the vertical direction, and the driving shaft 23 is fixedly connected to the output shaft of the first motor 22. The driving shaft 23 penetrates into the inside of the drying cylinder 11 upwardly, and in the embodiment, the driving shaft 23 penetrates through the discharging pipe 17 and sealingly and slidingly cooperates with the discharging pipe 17. The closing plate 24 is fixedly installed on the upper end of the driving shaft 23, and is perpendicular to the driving shaft 23 to form a material blocking surface. It is particularly emphasized that the closing plate 24 is in a circular structure, and is located at the bottom of the lower chamber 13, that is, the closing plate 24 separates the lower chamber 13 from the discharging chamber 12.

[0042] It is particularly pointed out that the closing plate 24 is located at the bottom of the annular cylinder 19, and sealingly and slidingly cooperates with the inner wall of the annular cylinder 19, that is, the outer peripheral wall of the closing plate 24 abuts against the inner wall of the annular cylinder 19. When the material to be dried enters the drying cylinder 11 through the feeding port 15, the closing plate 24 can bear the material. The closing plate 24 is provided with a plurality of gas permeable holes penetrating upwardly and downwardly, and the diameter of the gas permeable holes is smaller than the particle size of the material, that is, the gas permeable holes on the closing plate 24 can ensure that the hot air entering the discharging chamber 12 from the air inlet pipe 18 passes through the closing plate 24, and the hot air dries the material when passing through the material.

[0043] When the polyester chip crystalline material in the lower chamber 13 and the upper chamber 14 completes the drying work, the lifting plate 21 drives the driving shaft 23 to descend along the track 20, so that the closing plate 24 descends to leave 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 crystalline material in the lower chamber 13 and the upper chamber 14 falls into the discharging chamber 12, and then the polyester chip crystalline material is discharged from the discharging pipe 17.

[0044] A plurality of stirring blades 25 are fixedly installed on the driving shaft 23 and circumferentially fixedly installed on the driving shaft 23, rotate with the driving shaft 23, and are located in the discharging cavity 12. The stirring blades 25 can stir the material in the discharging cavity 12, prevent the material from being accumulated, and ensure that the material is smoothly discharged through the discharging pipe 17.

[0045] As shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , the layering module includes a bearing unit and a layering unit.

[0046] The bearing unit includes a fixed cylinder 30, a fixed strip 31, a lifting frame 33, a top ring 34, a first spring 35, and a limiting plate 36.

[0047] The fixed cylinder 30 is fixedly installed in the upper chamber 14 and has the same inner diameter as the annular cylinder 19. The fixed cylinder 30 has an open structure at both upper and lower ends and is coaxially arranged with the drying cylinder 11. The fixed cylinder 30 is fixedly installed on the outer side wall of the fixed cylinder 30 and has a rectangular strip structure. One fixed strip 31 is symmetrically arranged on the front and rear side walls of the fixed cylinder 30. The length of the fixed strip 31 extends in the vertical direction. The fixed strip 31 is fixedly connected with the inner wall of the drying cylinder 11, so that the fixed cylinder 30 is fixedly installed on the drying cylinder 11 and the stability of the fixed cylinder 30 is ensured. The bottom of the fixed cylinder 30 is spaced apart from the annular cylinder 19 by a certain distance, and the upper end of the fixed cylinder 30 is lower than the height of the feeding port 15 and the exhaust port 16. The left and right side walls of the fixed cylinder 30 are each provided with a left-right through perforation 32, and the perforation 32 is located at the position close to the lower end of the fixed cylinder 30.

[0048] The lifting frame 33 is slidably arranged on the outer side of the fixed cylinder 30 and has a cylindrical structure. The diameter of the lifting frame 33 is smaller than the inner diameter of the drying cylinder 11. The top ring 34 is arranged on the upper surface of the lifting frame 33 and has an annular structure. The first spring 35 is arranged 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. The lifting frame 33 is provided with through holes in front and back. The front and rear fixed strips 31 are 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 of the annular cylinder 19, and a communication cavity 37 (as shown in Figure 5 is formed between the lifting frame 33 and the inner wall of the drying cylinder 11. The communication cavity 37 has an annular structure.

[0049] On the inner sidewall of the lifting frame 33, there are two limiting plates 36, one on each side. The limiting plates 36 are horizontally arranged, and each corresponds to a through hole 32 on the left or right side of the fixed cylinder 30. The limiting plates 36 extend into the fixed cylinder 30 through the corresponding through hole 32. When the limiting plates 36 are pushed upwards, they cause the lifting frame 33 to move upwards, 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 cavity 37 to connect with the lower chamber 13. The moving distance of the limiting plates 36 is determined by the height of the through holes 32, ensuring the stable rise of the lifting frame 33. When the limiting plates 36 return to their original position, the first spring 35 returns to its original state, the lifting frame 33 re-abuts against the inclined section 191, and the lower end of the connecting cavity 37 returns to a closed state.

[0050] The layered unit includes a telescopic cylinder 40, an abutment part 41, a telescopic cylinder 42, a drive rod 43, a driven gear 50, a drive gear 51, a second motor 52, a sliding cylinder 60, a bearing plate 61, a tension spring 62, a connecting seat 63, a partition plate 64, a push column 65, a baffle plate 70, and a rotating block 71.

[0051] A telescopic cylinder 40 is rotatably mounted on the inner top wall of the drying cylinder 11. The telescopic cylinder 40 has a hollow structure and an opening at its lower end. The telescopic cylinder 40 is coaxially arranged with the drying cylinder 11 and is composed of multiple telescopic units that slide vertically together. A spring (not shown in the figure) is provided between each of the multiple telescopic units to provide elastic force for the reset of the multiple telescopic units. The lower end of the telescopic cylinder 40 has four abutment portions 41 along its circumference, and the abutment portions 41 have a square structure.

[0052] like Figure 3 As shown, a driven gear 50 is provided near the top of the telescopic cylinder 40. 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. The driving gear 51 meshes with the driven gear 50. A second motor 52 is mounted on the upper surface of the drying cylinder 11. The output end of the second motor 52 is connected to the driving gear 51. Thus, the second motor 52 drives the driven gear 50 to rotate through the driving gear 51, thereby causing the telescopic cylinder 40 to rotate.

[0053] A telescopic cylinder 42 is fixedly mounted on the upper surface of the drying cylinder 11. The axis of the telescopic part of the telescopic cylinder 42 extends vertically, and the telescopic part of the telescopic cylinder 42 extends downward into the interior of the drying cylinder 11. A drive rod 43 is rotatably mounted on the telescopic part 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.

[0054] The lower end of the driving rod 43 extends below the telescopic cylinder 40, and the driving rod 43 has a mounting cavity 44 near the bottom position, and four avoiding long holes 45 are formed in the outer side wall of the mounting cavity 44 along the circumferential direction (as shown in Figure 9 The length of the avoiding long hole 45 extends in the vertical direction.

[0055] The outer side of the driving rod 43 is slidably connected with a sliding cylinder 60, and the sliding cylinder 60 is located below the telescopic cylinder 40. The inner side of the sliding cylinder 60 is provided with a horizontally arranged bearing plate 61, and the bearing plate 61 is located inside the mounting cavity 44. The upper surface of the bearing plate 61 is provided with a tension spring 62, one end of the tension spring 62 is fixedly connected with the bearing plate 61, and the other end is connected with the driving rod 43. The tension spring 62 can provide elastic force for the reset of the bearing plate 61.

[0056] As shown in Figure 6 , the circumferential direction of the bearing plate 61 is provided with four connecting seats 63, and the connecting seats 63 are one-to-one corresponding to the avoiding long holes 45. The connecting seats 63 are fixedly connected with the inner wall of the sliding cylinder 60 through the corresponding avoiding long holes 45. The sliding cylinder 60 can ascend and descend with the bearing plate 61.

[0057] The four connecting seats 63 are all rotatably connected with isolation plates 64, and the isolation plates 64 are connected with the connecting seats 63 through rotating shafts. The axis of the rotating shaft extends in the horizontal direction. The rotating shaft is provided with a torsional spring, one end of the torsional spring is connected with the rotating shaft, and the other end is connected with the connecting seat 63. The torsional spring can keep the isolation plates 64 in an inclined state. That is, in the initial state, the isolation plates 64 are all in the inclined state (as shown in Figure 9 , and the isolation plates 64 can be switched between the horizontal state and the inclined state.

[0058] The isolation plates 64 are all provided with air permeable holes. Like the air permeable holes on the sealing plate 24, the air permeable holes can ensure that the hot air passes through but the material particles cannot pass through. The isolation plate 64 includes an outer arc surface, two identical side surfaces and an inner flat surface. The rotating shaft is fixedly installed on the inner flat surface of the isolation plate 64. When the four isolation plates 64 are all in the horizontal state, the side plates of the adjacent two isolation plates 64 abut against each other, so that the four isolation plates 64 form a disc structure, and the diameter of the disc is the same as the inner diameter of the fixed cylinder 30.

[0059] The bottom of the bearing plate 61 is also fixedly connected with a pushing column 65, and the pushing column 65 is vertically arranged. The lower side of the isolation plate 64 is also provided with four shielding plates 70, and the shielding plates 70 are the same as the isolation plates 64 in structure, but the difference is that the shielding plates 70 are not provided with air permeable holes. The inner flat surface of the shielding plate 70 is provided with a rotating shaft, and the rotating shaft is horizontally rotatably installed on the driving rod 43. The rotating shaft is provided with a torsional spring, one end of the torsional spring is connected with the rotating shaft, and the other end is connected with the driving rod 43. Similarly, the shielding plates 70 are kept in the inclined state. That is, in the initial state, the shielding plates 70 are all in the inclined state (as shown inFigure 9 The isolation plates 64 can be switched between a horizontal state and an inclined state.

[0060] The end of the rotation axis of the shielding plates 70 is fixedly installed with a rotating block 71, which is consistent with the inclination angle of the shielding plates 70, and when the jacking columns 65 are lowered to abut against all the rotating blocks 71, the rotating blocks 71 can be driven to rotate to a horizontal state, so that all the shielding plates 70 are rotated to a horizontal state, and similarly, when the four shielding plates 70 are all in a horizontal state, the side plates of adjacent two shielding plates 70 abut against each other, so that the four shielding plates 70 form a disc structure, and the diameter of the disc is the same as the inner diameter of the fixed cylinder 30.

[0061] In operation, the material to be dried is added into the drying cylinder 11 through the feeding port 15, and the material falls above the closing plate 24, that is, the material is located in the lower chamber 13 and the upper chamber 14, and then hot air is introduced into the drying cylinder 11 through the air inlet pipe 18, and the hot air passes through the closing plate 24 and enters the lower chamber 13 and the upper chamber 14, and the hot air dries the material as it passes through the material, and the material is constantly “boiled” inside the drying cylinder 11, the second motor 52 drives the driven gear 50 to rotate through the driving gear 51, drives the telescopic cylinder 40 to rotate, drives the driving rod 43 to rotate, so that the isolation plates 64 and the shielding plates 70 rotate, and the material can be properly stirred, so that the material can be fully dried, and it is particularly noted that the rotation speed of the isolation plates 64 and the shielding plates 70 does not need to be particularly fast. The large-particle material gradually settles to the bottom of the drying device under the action of gravity, and the small-particle material is suspended in the upper part of the material layer.

[0062] After a period of drying, the small-particle material in the upper part of the material layer will first approach a dry state, the telescopic cylinder 42 drives the driving rod 43 to rise, and the isolation plates 64 rise together with the driving rod 43 until the four isolation plates 64 abut against the corresponding four abutting portions 41, and since the springs between the telescopic units on the telescopic cylinder 40 are connected, and the elastic force of the springs on the telescopic cylinder 40 is greater than the elastic force of the torsion springs on the isolation plates 64, as the isolation plates 64 rise, the four isolation plates 64 gradually rotate to a horizontal state, and the four isolation plates 64 form a disc structure, which lifts the uppermost small-particle material and separates it from the large-particle material below, so that the large-particle material below has more “boiling” space, and the drying time of the large-particle material is shortened, and at this time, the air holes on the isolation plates 64 can still ensure that the hot air passes through, and finally the small-particle material above the isolation plates 64 is dried.

[0063] After the small particle size material above is completely dried, the telescopic cylinder 42 continues to drive the driving rod 43 to rise, each telescopic unit on the telescopic cylinder 40 is compressed, and then the isolation plate 64 abuts against the limiting plate 36, when the limiting plate 36 is pushed upward, the lifting frame 33 is driven to move upward by the limiting plate 36, the first spring 35 is compressed, and the lower end of the lifting frame 33 is separated from the inclined section 191 on the annular cylinder 19, so that the lower end of the communication cavity 37 is communicated with the lower chamber 13. When the lifting frame 33 moves to the limit position, the driving rod 43 continues to rise, the isolation plate 64 and the bearing plate 61 and the sliding cylinder 60 are forced to descend, the tension spring 62 is stretched, and when the push column 65 descends and abuts against all the rotating blocks 71, the rotating blocks 71 can be driven to rotate to the horizontal state, so that all the shielding plates 70 are rotated to the horizontal state, when the four shielding plates 70 are all in the horizontal state, the side plates of adjacent two shielding plates 70 abut against each other, so that the four shielding plates 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 shielding plates 70 are just located at the bottom position of the fixed cylinder 30, the four shielding plates 70 isolate the small particle size material completely dried above from the large particle material below, and the large particle material below is in the lower chamber 13.

[0064] The hot air passes through the large particle material below, enters the communication cavity 37, and finally is discharged from the exhaust port 16 after passing through the communication cavity 37, until the large particle material below is completely dried. The small particle size material above is effectively prevented from being over-dried.

[0065] 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 driving 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 discharging cavity 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 discharging cavity 12, prevent the material from accumulating, and ensure that the material passes through the discharge pipe 17 smoothly under the action of the stirring blade 25, so as to ensure that the discharging process is smooth and efficient.

[0066] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A polyester chip crystallization and drying apparatus, comprising: A drying cylinder has a feed inlet and an exhaust outlet. The bottom of the drying cylinder is also provided with a discharge pipe and an air inlet pipe. The drying cylinder is characterized by having an annular cylinder inside. The upper opening of the annular cylinder has an inclined section with an open structure. The interior of the annular cylinder forms a lower chamber, and the upper part of the annular cylinder is an upper chamber. A closed plate with vent holes is slidably mounted on the bottom of the annular cylinder. The drying cylinder is also provided with a layering module, which includes a support unit and a layering unit. The bearing unit includes a fixed cylinder fixed inside the drying cylinder, a lifting frame that slides vertically and elastically on the outside of the fixed cylinder, the lower end of the lifting frame abutting against the annular cylinder, a communicating cavity being formed between the lifting frame and the drying cylinder, and a limiting plate that penetrates into the inside of the fixed cylinder on the lifting frame. The layered unit includes a telescopic cylinder located inside the drying cylinder. The telescopic cylinder is composed of multiple telescopic units that slide vertically and elastically. A drive rod slides vertically inside the telescopic cylinder, with its lower end extending below the telescopic cylinder. A sliding cylinder slides vertically and elastically on the drive rod. The sliding cylinder has multiple inclined isolation plates circumferentially arranged. The isolation plates rotate on the sliding cylinder via elastic elements. When the isolation plates rotate to a horizontal state, all the isolation plates form a closed disc structure. A push column is provided inside the sliding cylinder. Below the isolation plates are multiple baffles with the same structure, which rotate on the drive rod via elastic elements. Each baffle has a rotating block. The isolation plates have ventilation holes. 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 drive rod. The lower end of the telescopic cylinder is provided with multiple abutment parts along its circumference. Each abutment part corresponds to a partition plate, and the partition plate can abut against the abutment parts to rotate the partition plate to a horizontal state.

2. The polyester chip crystallization and drying equipment according to claim 1, characterized in that, A frame is provided on the outside of the drying cylinder, and a vertically arranged track is provided on the frame. A lifting plate is vertically slidably installed on the track, and a drive shaft is provided on the lifting plate. The drive shaft passes through the drying cylinder and is connected to the sealing plate.

3. The polyester chip crystallization and drying equipment according to claim 2, characterized in that, A first motor is fixedly installed on the lifting plate, and a drive shaft is fixedly installed on the output end of the first motor. A stirring blade is also provided on the drive shaft, and the stirring blade is located below the closed plate.

4. The polyester chip crystallization and 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 and drying equipment according to claim 1, characterized in that, The telescopic cylinder is rotatably engaged with the drying cylinder. A driven gear is fixed on the telescopic cylinder and is coaxially arranged with the telescopic cylinder. A driving gear is rotatably installed on the inner top wall of the drying cylinder. The driving gear meshes with the driven gear. A second motor is installed 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 engaged with the drive rod.

6. The polyester chip crystallization and drying equipment according to claim 1, 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.

7. The polyester chip crystallization and drying equipment according to claim 6, characterized in that, The elastic element is a torsion spring.

8. The polyester chip crystallization and drying equipment according to claim 1, characterized in that, The bottom of the drying cylinder has a conical structure, and the inner side of the conical structure is the feeding chamber.

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