Infrared dehumidification crystallization drying machine barrel and crystallization drying machine

Abstract

The present invention discloses a barrel and dryer of an infrared dehumidification crystallization drying machine. The cross-sectional shape of the barrel is a polygon with more sides than a pentagon. One end of the barrel is open and is a feeding end. Each plate surface constituting the polygonal barrel includes an intermediate plate portion and a first closing plate portion and a second closing plate portion arranged at both ends of the intermediate plate portion. The first closing plate portion and the second closing plate portion both form an obtuse angle with the intermediate plate portion and close toward the middle. A discharge port is arranged on the side wall of the barrel or the other end opening of the barrel is arranged as a discharge port. When the other end opening of the barrel is arranged as a discharge port, a spiral discharge guide plate is arranged inside the barrel for facilitating the discharge of materials. The dryer uses the above-mentioned barrel to have a better turning effect without a turning plate, has low processing difficulty, and is suitable for the crystallization drying of some plastic particles with high viscosity.

Description

Technical Field

[0001] The invention relates to a barrel of an infrared dehumidification crystallization drying integrated machine and also relates to the infrared dehumidification crystallization drying integrated machine using the barrel. Background Art

[0002] In order to improve the quality of plastic products, the raw materials are generally processed into plastic particles. Loose plastic particles are easily affected by moisture when exposed to the air. Therefore, loose plastic particles need to be dried before being processed into plastic products. The common method is to use a heat dissipation fan to directly send the heat of the heater through a pipe into a pile of loose raw materials to dry the raw materials. The heat will diffuse in the loose raw materials, and the peripheral raw materials will be heated late. The raw materials are in close contact with each other, which reduces the contact area between the heat and the raw materials. In addition, the water vapor generated by the raw materials after heating cannot be removed in time, the drying time is long, and the energy waste is large. The applicant previously applied for a plastic particle dryer with a patent application number of 201410314528.6. In the patent application document, the applicant used an infrared short-wave light box as a heating source, which can quickly heat and dry the plastic particles. During the drying process, the barrel is rotating, the barrel is cylindrical as a whole, and a large number of flipping plates are arranged inside, so that the uniform heat dissipation of the plastic particles can be achieved by flipping the barrel.

[0003] However, this plastic particle dryer still has the following disadvantages:

[0004] 1. The barrel of the dryer is cylindrical. The effect of turning the material during the rotation of the cylindrical barrel is very poor. Therefore, multiple turning plates need to be welded inside, which increases the difficulty of production. At the same time, a cover plate is swingably installed at the discharge port of the barrel, and a driving mechanism is used to drive the cover plate to deflect to achieve the closing and opening of the discharge port. Since the drive of the cover plate is realized by a motor, and the motor needs to be fixed on the rotating barrel, the internal wiring is very complicated.

[0005] 2. The rotation of the filter cartridge of the current plastic particle dryer is driven by a motor, and the filter cartridge can generally be pulled out from the inside of the casing by axial sliding, which is convenient for cleaning and maintenance. Therefore, the motor needs to be installed by sliding it out from the inside of the casing together with the filter cartridge, and other electrical components such as a fan need to be installed at the other end of the entire plastic particle dryer. This results in wiring at both ends of the equipment, complex internal wiring and potential safety hazards.

[0006] 3. When the infrared light box of the current plastic particle dryer is heating, although the lamp tube is facing the direction of the material, the heat generated by the lamp tube will also be transferred to the light box. In this way, when the plastic particles fall on the light box, they will be heated and adhere to the light box, which causes serious adhesion of plastic particles on the light box. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a barrel of an infrared dehumidification crystallization drying integrated machine, which can have a better turning effect without a turning plate and has low processing difficulty.

[0008] Another technical problem to be solved by the present invention is to provide an infrared dehumidification crystallization drying integrated machine, which uses the above-mentioned barrel and has a good material turning effect.

[0009] In order to solve the above technical problems, the technical solution of the present invention is: a barrel of an infrared dehumidification crystallization drying machine, the cross-sectional shape of the barrel is a polygon with a side number greater than a pentagon, one end of the barrel is open and is a feeding end, each plate surface constituting the polygonal barrel includes a middle plate portion and a first closing plate portion and a second closing plate portion arranged at both ends of the middle plate portion, the first closing plate portion and the second closing plate portion both form an obtuse angle with the middle plate portion and close to the middle, a discharge port is arranged on the side wall of the barrel or the other end opening of the barrel is arranged as a discharge port; when the other end opening of the barrel is arranged as a discharge port, a spiral discharge guide plate for facilitating material discharge is arranged inside the barrel.

[0010] As a preferred solution, the discharge port on the side wall of the barrel is arranged at the junction of two adjacent plate surfaces, and one of the two adjacent plate surfaces deviates outward to form the discharge port.

[0011] As a preferred solution, the inner wall of the barrel is provided with a turning structure for facilitating turning over of the plastic particles.

[0012] As a preferred solution, the material turning structure includes a material turning protrusion arranged on each of the first closing plate portion and the second closing plate portion.

[0013] As a preferred solution, the material turning structure also includes at least one pair of material turning plates provided on the middle plate portion, the material turning plates are arranged in an eight-shaped shape, and the direction of one end of the pair of material turning plates close to each other is tangent to the working rotation direction of the barrel.

[0014] As a preferred solution, the material turning structure includes a plurality of groups of material turning plates arranged in parallel, the plate surfaces of the material turning plates intersect with the center line of the barrel at an angle, and each group of material turning plates is arranged on the middle plate portion.

[0015] After adopting the above technical scheme, the effect of the present invention is: due to the barrel of the infrared dehumidification crystallization drying machine, the cross-sectional shape of the barrel is a polygon with a number of sides greater than a pentagon, one end of the barrel is open and is a feeding end, and a discharge port is arranged on the side wall of the barrel. Since the barrel adopts a polygonal structure, during the rotation of the barrel, the material is flipped from one plate surface to another plate surface, thereby achieving a flipping effect, and there is no need to add an additional flipping plate to ensure that the internal material has a sufficient flipping effect, ensuring that each particle of material inside can be better heated; in addition, each plate surface of the barrel includes a middle plate portion and a first closing plate portion and a second closing plate portion arranged at both ends of the middle plate portion, the first closing plate portion and the second closing plate portion both form an obtuse angle with the middle plate portion and close to the middle, which can reduce the plastic particles from falling from the openings at both ends during the flipping process, and at the same time, the closing structure can also form an inclined plate portion, which can also play an axial flipping effect, and the flipping effect is better. The discharge port of the barrel can also be an opening at the other end of the barrel. In this case, a spiral discharge guide plate is provided inside the barrel to facilitate the discharge of materials. In this way, there is no opening on the barrel body of the barrel. The barrel rotates during operation, and the rotation direction is opposite to the discharge rotation direction. In this way, the internal material will not be discharged along with the spiral discharge guide plate. In this way, it can meet the needs of more viscous materials. For example, in the production process of PET masterbatch, when the PET raw material is crystallized, the material has high viscosity after being heated. After adopting this solution, there will be no leakage of PET raw material ions during the crystallization process in the barrel, thereby avoiding the mixing of crystallized materials and uncrystallized materials to affect the subsequent production of PET masterbatch.

[0016] Since the discharge port of the barrel is arranged at the junction of two adjacent plates, one of the two adjacent plates deviates outward to form the discharge port. The formation of the discharge port is relatively simple, and only one of the plates needs to deviate outward to form it. Moreover, the setting of such a discharge port does not require an additional cover plate, and the switching of the working and discharging states can be achieved by the forward rotation and flipping of the barrel, thereby saving the cover plate and the motor driving the cover plate, simplifying the structure, and having fewer internal wires and higher reliability. In addition, preferably, the discharge port is arranged at the junction of the middle plate portion of the two adjacent plates. In this way, due to the existence of the closing at both ends, the discharge port is arranged at the junction of the middle plate portion, and the discharge is more thorough. Moreover, due to the use of a polygonal barrel, during the drying process of the material, for some plastic particles that have a certain viscosity after heating, even if the material adheres to the barrel and rotates to the uppermost end, it will fall along the inclined plate surface, and will not fall vertically, thus reducing the probability of the material leaking from the discharge port under the working state.

[0017] Furthermore, since the material turning structure includes a material turning protrusion arranged on each of the first closing plate portion and the second closing plate portion, the material turning protrusion can turn the material on the first closing plate portion and the second closing plate portion to a certain extent, further increasing the material turning effect.

[0018] Furthermore, since the material turning structure also includes at least one pair of material turning plates arranged on the middle plate portion, the material turning plates are arranged in an eight-shape, and the direction of one end of the pair of material turning plates that are close to each other is tangent to the working rotation direction of the barrel, the material turning plates can be used to separate the plastic particles in the axial direction, thereby forming material turning again.

[0019] Furthermore, since the material turning structure includes several groups of parallelly arranged turning plates, the plate surface of the turning plates intersects with the center line of the barrel at an angle, and each group of turning plates is arranged on the middle plate portion, this structure of the turning plates is more suitable for setting a spiral discharge guide plate. Assuming that the forward rotation of the barrel is the working rotation direction and the reverse rotation is the discharge rotation direction, in the normal crystallization process, the parallelly arranged turning plates can realize turning, and when discharge is required, the turning plates play a guiding role. The material moves along the turning plates to the discharge port, and then falls onto the rotating discharge guide plate, and is finally discharged from the discharge port. This turning mechanism shortens the discharge time of plastic particles, makes the discharge smoother and more thorough, and all the materials in the barrel can be discharged.

[0020] In order to solve the above second technical problem, the technical solution of the present invention is: an infrared dehumidification crystallization drying integrated machine, comprising a frame, a shell is fixed on the frame, the above barrel is rotatably mounted on the frame around the central axis, the barrel is driven to rotate by a motor, a feeding device is installed on the shell at the feeding port side of the barrel, a lamp box that can emit infrared short waves to heat the material from the feeding port into the barrel is installed on the frame, a fan is also arranged on the frame, the fan is connected to an exhaust pipe that is connected to the barrel and exhausts air in the barrel, and both ends of the barrel are respectively provided with limit devices for limiting the axial position of the barrel;

[0021] When the discharge port is arranged on the side wall of the barrel, a discharge port corresponding to the position of the discharge port is arranged below the housing;

[0022] When the other end of the barrel is opened as a discharge port, an outer cover for sealing the discharge port is hinged on the frame, an opening and closing power device for driving the outer cover to open and close is arranged on the frame, and a guide hopper is arranged on the frame below the discharge port.

[0023] As a preferred scheme, the frame includes a fixed support frame and a sliding seat axially slidably mounted on the fixed support frame, two pairs of support rollers are installed on the sliding seat, and a rotating support structure for facilitating the rotation of the barrel is installed on the outer periphery of the barrel, and the barrel is rotatably mounted on the support roller through the rotating support structure, and the limit device is installed on the sliding seat and limits the axial position of the barrel, one of the two pairs of support rollers is an active support roller, the motor is fixed on the fixed support frame, and the output shaft of the motor is connected to the axle of the active support roller through a split coupling, and the guide hopper is fixed on the sliding seat.

[0024] As a preferred solution, the light box includes a box body, a lamp tube installation chamber is arranged at the bottom of the box body, a plurality of lamp tubes are arranged and installed in the lamp tube installation chamber, a heat insulation layer is pasted on the wall of the lamp tube installation chamber, and an air cooling device for air cooling the lamp tube is connected to the box body.

[0025] As a preferred solution, a partition plate is provided on the fixed support frame near the feed end of the barrel, and an end seal and a thermal insulation pad are fixed on the partition plate. The thermal insulation pad is arranged between the box body and the partition plate, and the end seal includes a mounting flange portion installed on the partition plate and a sealing protrusion protruding toward the barrel direction, and the opening of the feed end of the barrel is sleeved on the sealing protrusion and sealed.

[0026] As a preferred solution, the opening and closing power device is a cylinder, a cylinder bracket is fixed on the sliding seat, the cylinder is hinged on the cylinder bracket, an end frame is provided on the sliding seat near the discharge end of the barrel, the middle part of the opening cover lever is hinged on the end frame, one end of the opening cover lever is hinged to the piston cylinder of the cylinder, and the outer cover is rotatably mounted on the other end of the opening cover lever through a bearing.

[0027] As a preferred solution, the opening and closing power device is a cylinder, a cylinder bracket is fixed on the sliding seat, the cylinder is installed on the cylinder bracket, an outer cover bracket is axially slidably installed on the sliding seat, the outer cover is rotatably installed on the outer cover bracket through a bearing, and the outer cover bracket is driven by the cylinder.

[0028] After adopting the above technical scheme, the effect of the present invention is as follows: an infrared dehumidification crystallization drying integrated machine includes a frame, a shell is fixed on the frame, the above-mentioned barrel is rotatably installed on the frame around the central axis, the barrel is driven to rotate by a motor, a feeding device is installed on the shell at the feeding port side of the barrel, a light box that can emit infrared short waves to heat the material and extends from the feeding port into the barrel is installed on the frame, a fan is also arranged on the frame, and the fan is connected to a fan connected to the barrel to exhaust air in the barrel The exhaust pipe and the two ends of the barrel are respectively provided with limit devices for limiting the axial position of the barrel; when the discharge port is arranged on the side wall of the barrel, a discharge port corresponding to the position of the discharge port is arranged below the casing; when the other end of the barrel is opened as the discharge port, an outer cover for blocking the discharge port is hinged on the frame, and an opening and closing power device for driving the outer cover to open and close is arranged on the frame, and a guide hopper is arranged below the discharge port on the frame; the infrared dehumidification crystallization drying integrated machine adopts the above-mentioned barrel, and the barrel The motor drives the rotation to make the plastic particles tumble better in the barrel. At the same time, the light box extends into the barrel to irradiate the plastic particles with infrared shortwave to achieve infrared drying. During the drying process, the moisture can be extracted by the exhaust pipe, and the whole dryer has a good turning effect. In addition, during the drying process, since the cross-sectional shape of the barrel is a polygon with a number of sides greater than 5, when the discharge port is set on the side wall of the barrel, if the viscosity of the plastic particles is not large, the plastic particles are difficult to adhere to the inner wall of the barrel, so there will be no leakage. If the viscosity of the plastic particles is relatively large during the heating process, such as the raw materials of PET masterbatch, they may adhere to the inner wall of the barrel during crystallization. At this time, the adhered particles are rotated by the barrel. When it reaches the highest point, if the lower side wall just corresponds to the discharge port, the plastic particles will fall into the discharge port when they fall off, and finally leak. Despite this, after adopting the above-mentioned polygonal barrel, the plastic particles will roll down along the inner wall more due to the inner wall of the polygon when they fall off. Compared with the existing structure, the probability of leakage is reduced. When the crystallization and drying integrated machine adopts the end-discharging method, no matter how the plastic particles adhere, there will be no leakage, thus completely solving the leakage problem of plastic particles with high viscosity and solving the industry pain point that crystallized particles and uncrystallized particles are easily mixed in the production process of PET masterbatch.

[0029] The cam is secured to the chassis and is provided with a plurality of camshafts which are adapted to move the camshafts along the axis of the chassis and the camshafts are secured to the chassis.

[0030] Furthermore, since the light box includes a box body, a lamp tube installation chamber is arranged at the bottom of the box body, a plurality of lamp tubes are arranged and installed in the lamp tube installation chamber, a heat insulation layer is pasted on the wall of the lamp tube installation chamber, and an air cooling device for air cooling the lamp tube is connected to the box body. The air cooling device can supply air to the inside of the light box, thereby achieving heat dissipation of the lamp tube; and at the same time, the heat insulation layer can achieve heat insulation and reduce heat transfer to the box body, so that even if the plastic particles fall onto the surface of the box body, they will not adhere to the surface of the box body due to excessively high temperature.

[0031] Furthermore, since a partition plate is provided on the fixed support frame near the feed end of the barrel, an end seal and a thermal insulation pad are fixed on the partition plate, and the thermal insulation pad is provided between the box body and the partition plate, the end seal includes a mounting flange portion installed on the partition plate and a sealing protrusion protruding toward the barrel, and the opening of the feed end of the barrel is sleeved on the sealing protrusion and sealed. After adopting the above structure, the thermal insulation pad can divide the heat transferred from the light box, and the sealing protrusion of the end seal can be inserted into the opening of the feed end of the barrel and sealed, thereby preventing plastic particles from splashing out from the feed end.

[0032] Furthermore, since the opening and closing power device is a cylinder, a cylinder bracket is fixed on the sliding seat, the cylinder is hinged on the cylinder bracket, an end frame is provided on the sliding seat near the discharge end of the barrel, the middle part of the opening cover lever is hinged on the end frame, one end of the opening cover lever is hinged to the piston cylinder of the cylinder, and the outer cover is rotatably mounted on the other end of the opening cover lever through a bearing. With this structure, the extension and retraction of the cylinder can utilize the opening cover lever to open or close the outer cover. At the same time, since the outer cover is mounted on the opening cover lever through a bearing, after closing, the outer cover can still rotate with the barrel, thereby completely avoiding the splashing of plastic particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Figure 1 1 is a schematic diagram of the barrel end surface structure of Example 1 of the present invention;

[0035] Figure 2 yes Figure 1 Left view of;

[0036] Figure 3 Schematic diagram of the end structure of the barrel of Example 2;

[0037] Figure 4 1 is a schematic diagram of the expansion of the barrel of Example 2;

[0038] Figure 5 is a schematic structural diagram of the crystallization and drying integrated machine in Example 3;

[0039] Figure 6 is a side schematic diagram of the crystallization and drying integrated machine in Example 3;

[0040] Figure 7 It is a schematic diagram of the barrel installation in Example 3;

[0041] Figure 8 is a structural cross-sectional view of the split coupling in Example 3;

[0042] Fig. 9 is the one in Example 3 Figure 8 Right view of;

[0043] Fig.10 is a partial structural schematic diagram of the light box in Example 3;

[0044] Fig.11 is a schematic structural diagram of the crystallization and drying integrated machine in Example 4;

[0045] Fig.12 This is a schematic diagram of the barrel installation in Example 4;

[0046] Fig.13 is a schematic diagram of the installation of an outer cover of another structure in Example 4;

[0047] Fig.14 is a schematic diagram of the installation of an outer cover of another structure in Example 4;

[0048] In the attached drawings: 1. barrel; 101. plate surface; 1011. middle plate; 1012. first closing plate; 1013. second closing plate; 102. discharge port; 103. material turning protrusion; 104. material turning plate; 105. spiral discharge guide plate; 2. frame; 21. fixed support frame; 22. sliding seat; 23. partition plate; 3. casing; 4. feeding device; 5. light box; 51. box body; 52. lamp tube installation chamber; 53. lamp tube; 54. heat insulation layer; 6. exhaust pipe; 7. air cooling air supply pipe; 8. motor; 9. split coupling device; 91. female coupling; 911. groove; 92. male coupling; 921. protrusion; 10. limit device; 101. mounting seat; 102. limit roller; 11. support roller; 12. active support roller; 13. rotating support structure; 14. outer cover; 15. guide hopper; 16. cylinder; 17. end seal; 171. mounting flange; 172. sealing protrusion; 18. thermal insulation pad; 19. cover opening lever; 20. bearing; 210. cylinder bracket; 211. outer cover bracket; 212. guide rod; 213. guide sleeve. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below through specific examples.

[0050] Example 1

[0051] like Figure 1 to Figure 2 As shown, a barrel 1 of an infrared dehumidification crystallization drying machine, the cross-sectional shape of the barrel 1 is a polygon with more sides than a pentagon, preferably, the polygon is one of a pentagon to a decagon, and a suitable polygon is selected according to the size of the barrel 1, one end of the barrel 1 is open and is a feeding end, each plate surface 101 constituting the polygonal barrel 1 includes an intermediate plate portion 1011 and a first closing plate portion 1012 and a second closing plate portion 1013 arranged at both ends of the intermediate plate portion 1011, the first closing plate portion 1012 and the second closing plate portion 1013 both form an obtuse angle with the intermediate plate portion 1011 and close to the middle, and a discharge port 102 is arranged on the side wall of the barrel 1. In this embodiment, the discharge port 102 of the barrel 1 is arranged at the junction of two adjacent plate surfaces 101, and one of the two adjacent plate surfaces 101 deviates outward to form the discharge port 102. The discharge port 102 is disposed at the connection point between the middle plate portions 1011 of two adjacent plate surfaces 101 .

[0052] The plates 101 are welded to form a polygon, preferably a regular polygon. The plate 101 is a flat plate 101 that is bent to form a middle plate 1011, a first closing plate 1012 and a second closing plate 1013. The inner wall of the barrel 1 is provided with a turning structure for facilitating turning over of plastic particles.

[0053] In this embodiment, the material turning structure includes a material turning protrusion 103 provided on each of the first closing plate portion 1012 and the second closing plate portion 1013. The material turning protrusion 103 adopts a triangular cone-shaped protrusion 921 and is also fixed by welding. The material turning structure also includes at least one pair of material turning plates 104 provided on the middle plate portion 1011, the material turning plates 104 are arranged in an eight-shaped shape, and the direction of one end of the pair of material turning plates 104 close to each other is tangent to the working rotation direction of the barrel 1, the material turning plates 104 adopt a three-sided rectangular arch structure, and are also fixed by welding. After adopting the above-mentioned material turning structure, the material turning protrusion can facilitate the turning of the first closing plate portion 1012 and the second closing plate portion 1013, and the material turning plate 104 can play an axial material turning effect, so that the plastic particles are finally heated more evenly.

[0054] Example 2

[0055] like Figure 3 and Figure 4 As shown, this embodiment discloses another barrel 1 of an infrared dehumidification crystallization drying machine. The structure of the barrel 1 is similar to that of the embodiment 1, except that, in this embodiment, the side wall of the barrel 1 is not provided with an opening, and the opening at the other end of the barrel 1 is provided as a discharge port; and at this time, a spiral discharge guide plate 105 is provided inside the barrel 1 to facilitate the discharge of materials. In the present embodiment, in order to increase the speed of discharging and enable the material to be discharged more thoroughly to avoid residue, in the present embodiment, the material turning structure includes a plurality of groups of parallelly arranged turning plates 104, the plate surface of the turning plate 104 intersects with the center line of the barrel at an angle, and each group of turning plates is arranged on the middle plate portion 1011, and preferably, in the plate surface 101 constituting the barrel 1, a group of the turning plates 104 is arranged every other plate surface 101, and one end of the spiral discharge guide plate 105 is located inside the barrel 1 and connected to one group of turning plates 104, and the other end spirally extends to the discharge port, so that in the process of turning the barrel 1, its rotation direction is not the discharging rotation direction, and the material will not be discharged along the spiral discharge guide plate 105. When discharging is required, the barrel 1 rotates in the opposite direction, and the material will fall onto the spiral discharge guide plate 105, and the turning plate will accelerate the falling of the material, and finally the discharge is very fast and thorough without residue.

[0056] Example 3

[0057] like Figures 5 to 10The infrared dehumidification crystallization drying integrated machine comprises a frame 2, a housing 3 is fixed on the frame 2, a barrel 1 is rotatably mounted on the frame 2 around a central axis, the frame 2 comprises a fixed support frame 21 and a sliding seat 22 axially slidably mounted on the fixed support frame 21, two pairs of support rollers 11 are mounted on the sliding seat 22, a rotating support structure 13 is mounted on the outer periphery of the barrel 1 to facilitate the rotation of the barrel 1, the barrel 1 is rotatably mounted on the support roller 11 through the rotating support structure 13, and the limit device 10 is mounted on the sliding seat 22 and limits the axial position of the barrel 1. One of the two pairs of support rollers 11 is an active support roller 12, the motor 8 is fixed on the frame, and the output shaft of the motor 8 is connected to the axle of the active support roller 12 through a split coupling 9. In this embodiment, the axles of the support rollers on the same side are synchronously rotated through a synchronous rotating shaft.

[0058] The rotating support structure 13 is two supporting flanges, which are respectively welded to the two ends of the barrel 1. Of course, the rotating support structure 13 can also be in other forms, such as a cylindrical outer supporting cylinder, in which the barrel 1 is fixed, which is also convenient for rotation.

[0059] The limiting device 10 includes a mounting seat 101 fixed on the sliding seat 22 , and a limiting roller 102 is installed on the mounting seat 101 . The limiting device 10 is installed at both ends of the barrel 1 to achieve axial limiting of the barrel 1 and facilitate the rotation of the barrel 1 .

[0060] The split coupling 9 includes a male coupling 92 and a female coupling 91, wherein the female coupling 91 includes a coupling plate, on which a plurality of grooves 911 are arranged; and the coupling plate of the male coupling 92 is provided with protrusions 921 corresponding to the grooves 911; thus, when the two are axially close together, the protrusions 921 are inserted into the grooves 911 to realize power transmission.

[0061] The barrel 1 is driven to rotate by a motor 8, and a feeding device 4 is installed on the casing 3 at the feeding port side of the barrel 1. The feeding device 4 includes a feeding hopper. A vacuum loader can be arranged on the feeding hopper to suck the material into the feeding hopper by means of negative pressure suction, and the material is fed into the barrel 1 through the feeding channel by the feeding hopper. A light box 5 is installed on the frame 2, which extends from the feeding port into the barrel 1 and can emit infrared short waves to heat the material. A fan is also arranged on the frame 2, and a suction pipe 6 connected to the barrel 1 for exhausting air in the barrel 1 is connected to the fan. Limiting devices 10 for limiting the axial position of the barrel 1 are respectively arranged at both ends of the barrel 1, and a discharge port corresponding to the position of the discharge port 102 is arranged below the casing 3.

[0062] The light box 5 comprises a box body 51, a lamp tube installation chamber 52 is arranged at the bottom of the box body 51, a plurality of lamp tubes 53 are arranged and installed in the lamp tube installation chamber 52, a heat insulation layer 54 is pasted on the wall of the lamp tube installation chamber 52, and an air cooling device for air cooling the lamp tubes 53 is connected to the box body 51. The cooling device comprises a cooling fan, which extends into the box body 51 through the air cooling air supply pipe 7 to realize the cooling of the interior of the light box 5.

[0063] In this embodiment, a partition plate 23 is provided on the fixed support frame 21 near the feed end of the barrel 1, and the partition plate 23 divides the entire device into a heating area and an electrical component installation area. An end seal 17 and a thermal insulation pad 18 are fixed on the partition plate 23. The thermal insulation pad 18 is arranged between the box body and the partition plate 23 to achieve a heat insulation effect. The end seal 17 includes a mounting flange portion 171 installed on the partition plate 23 and a sealing protrusion 172 protruding toward the barrel direction. The opening of the feed end of the barrel 1 is sleeved on the sealing protrusion 172 and sealed. The sealing method can be achieved by using a heat-resistant silicone ring. The sealing does not need to be very strict, and is mainly to prevent plastic particles from flying out of the feed end.

[0064] Example 4

[0065] like Figures 11 to 14 As shown, the infrared dehumidification crystallization drying machine in this embodiment has basically the same structure as that in embodiment 3, except that the barrel 1 in this embodiment adopts the structure in embodiment 2, and at this time, an outer cover 14 for sealing the discharge port is hinged on the frame 2, and further, a mounting frame is provided on the sliding seat 22 on the outside of the barrel 1, and the outer cover 14 is hinged on the mounting frame, and an opening and closing power device for driving the outer cover 14 to open and close is provided on the frame 2, and a guide hopper 15 is provided on the frame 2 below the discharge port, wherein the opening and closing power device is preferably driven by a cylinder 16, and of course other linear power devices can also be used, one end of the cylinder 16 is hinged on the outer cover 14, and the other end is hinged on the mounting frame, and the cylinder 16 can drive the outer cover 14 to seal the discharge port of the barrel 1, but it does not need to be sealed very tightly to facilitate the rotation of the barrel.

[0066] Of course, in order to further block the discharge port better, the installation of the outer cover 14 is further optimized in this embodiment. Fig.13As shown, in the present embodiment, the outer cover 14 is still driven by the cylinder 16, but the piston rod of the cylinder 16 is not directly hinged to the outer cover 14, but is driven by a cover-opening lever 19. The cylinder 16 is hinged on the cylinder bracket 210, and the cylinder bracket 210 is a gantry bracket and is fixed on the sliding seat 22. The barrel 1 can just be in the space of the gantry bracket, and the cover-opening lever 19 is hinged on the end frame of the discharging end of the sliding seat 22. One end of the cover-opening lever 19 is hinged to the piston rod of the cylinder 16, and the outer cover 14 is installed on the other end of the cover-opening lever 19 through a bearing 20. In this way, the extension and contraction of the piston rod of the cylinder 16 can drive the cover-opening lever 19 to swing, thereby realizing the opening and closing of the cover, and the outer cover 14 can rotate. In this way, the cylinder 16 drives the outer cover 14 to close very tightly, and after closing, the outer cover 14 can rotate with the barrel 1, so that the sealing effect is better and the leakage phenomenon is completely eliminated.

[0067] For example Fig.14 As shown, Fig.14 Another installation method of the outer cover is disclosed in Fig.14 In the embodiment, the outer cover is opened and closed in an axially moving manner, wherein the opening and closing power device is still preferably a cylinder, a cylinder bracket is fixed on the sliding seat, the cylinder is mounted on the cylinder bracket, the cylinder bracket also adopts a gantry bracket, and an outer cover bracket is axially slidably mounted on the sliding seat, wherein, in this embodiment, a guide rod is fixed on the gantry bracket, the guide rod extends axially, and the outer cover bracket includes two guide sleeves slidably mounted on the guide rod, a support rod is connected between the guide sleeves, the outer cover is rotatably mounted on the support rod of the outer cover bracket through a bearing, and the outer cover bracket is driven by the cylinder. In this way, when the cylinder is actuated, it can drive the outer cover bracket to move axially to realize the opening and closing action, and similarly, the outer cover is rotatably mounted on the support rod, so the outer cover can still rotate after closing, and the leakage phenomenon can also be completely eliminated.

[0068] The infrared dehumidification crystallization drying machine can be used not only for dehumidification crystallization drying of plastic particles or plastic sheets, but also for drying other fluid materials, such as drying and dehumidifying grains. In particular, the infrared dehumidification crystallization drying machine in Example 4 can better meet the crystallization drying of highly viscous plastic particles such as the raw materials of PET masterbatch.

[0069] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. The barrel of the infrared dehumidification crystallization drying machine is characterized by: The cross-sectional shape of the barrel is a polygon with a greater number of sides than a pentagon, one end of the barrel is open and is a feeding end, each plate surface constituting the polygonal barrel includes a middle plate portion and a first closing plate portion and a second closing plate portion arranged at both ends of the middle plate portion, the first closing plate portion and the second closing plate portion both form an obtuse angle with the middle plate portion and close toward the middle, a discharge port is arranged on the side wall of the barrel; the discharge port on the side wall of the barrel is arranged at the junction of two adjacent plate surfaces, and one of the two adjacent plate surfaces deviates outward to form the discharge port; The inner wall of the barrel is provided with a flipping structure for facilitating the flipping of plastic particles, and the flipping structure includes a flipping protrusion arranged on each first closing plate portion and the second closing plate portion; the flipping structure also includes at least one pair of flipping plates arranged on the middle plate portion, and the flipping plates are arranged in an eight-shaped shape, and the direction of one end of the pair of flipping plates close to each other is tangent to the working rotation direction of the barrel; the switching of the working and discharging states is achieved by the forward and reverse rotation of the barrel without the need for an additional cover plate.

2. An infrared dehumidification crystallization drying integrated machine, comprising a frame, a housing fixed on the frame, characterized in that: The barrel as claimed in claim 1 is rotatably mounted on the frame around the central axis, the barrel is driven to rotate by a motor, a feeding device is mounted on the housing at the feeding port side of the barrel, a light box that can emit infrared short waves to heat the material is mounted on the frame and extends from the feeding port into the barrel, a fan is also arranged on the frame, the fan is connected to an exhaust pipe that is connected to the barrel and exhausts air in the barrel, and both ends of the barrel are respectively provided with limit devices for limiting the axial position of the barrel; When the discharge port is arranged on the side wall of the barrel, a discharge port corresponding to the position of the discharge port is arranged below the housing; The transmission mechanism that the cam is used for the lifting of ...

3. The infrared dehumidification crystallization drying integrated machine as claimed in claim 2, characterized in that: The light box includes a box body, a lamp tube installation chamber is arranged at the bottom of the box body, a plurality of lamp tubes are arranged and installed in the lamp tube installation chamber, a heat insulation layer is pasted on the chamber wall of the lamp tube installation chamber, and an air cooling device for air cooling the lamp tube is connected to the box body.

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