Rotary dryer

Abstract

The utility model belongs to the technical field of plastic particle production, and particularly relates to a rotary dryer which comprises an outer cylinder and an inner cylinder, the inner cylinder is rotatably connected to the inner side of the outer cylinder, a plurality of heating pipes are fixedly installed on the inner wall of the outer cylinder, a support is fixedly connected to the lower side of the side wall of the outer cylinder, and a waste collecting assembly is arranged on the lower side of the side wall of the outer cylinder; a plurality of leaking holes are formed in the side wall of the inner cylinder, a spiral rod is fixedly connected to the inner wall of the inner cylinder, a hopper is fixedly connected to the position, close to the left end, of the side wall of the outer cylinder, a discharging pipe is fixedly connected to the bottom face of the hopper, the other end of the discharging pipe extends into the inner cylinder, and a blocking plate is rotationally connected to the inner wall of the discharging pipe; an adjusting assembly is arranged on the front side wall of the discharging pipe. According to the plastic particle discharging device, the discharging amount of plastic particles can be controlled, so that the plastic particles are continuously dried and discharged while being discharged, and the drying effect on the plastic particles is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic particle production, and specifically relates to a rotary dryer. Background Art

[0002] In the production process of plastic granules, the plastic raw materials need to be melted and then water-cooled, formed and cut into plastic granules. Since there will be a lot of moisture left on the surface of the formed plastic granules, in order to ensure the quality of the plastic granules, they need to be dried in time; traditional drying methods generally include air cutting dryers, rotary dryers, vacuum dryers, etc.

[0003] The existing rotary dryers generally put the collected plastic particles directly into the material box, and the plastic particles will directly enter the drying cylinder for drying according to the feeding pipe. In this feeding method, whether it is directly receiving the formed particles or placing the particles uniformly later, the feeding amount is controlled according to the diameter of the feeding pipe. It is not convenient to adjust the feeding amount of the feeding pipe according to the on-site usage, which is easy to affect the drying effect and product quality. Utility Model Content

[0004] The purpose of the utility model is to provide a rotary dryer, which can control the feeding amount of plastic particles so that the plastic particles can be continuously dried and discharged while feeding, thereby effectively improving the drying effect of the plastic particles.

[0005] The technical solutions adopted in this utility are as follows:

[0006] The rotary dryer comprises an outer cylinder and an inner cylinder, wherein the inner cylinder is rotatably connected to the inner side of the outer cylinder, a plurality of heating tubes are fixedly installed on the inner wall of the outer cylinder, a bracket is fixedly connected to the side wall of the outer cylinder at the lower side, and a waste collection assembly is arranged on the side wall of the outer cylinder at the lower side;

[0007] The side wall of the inner cylinder is provided with a plurality of leakage holes, the inner wall of the inner cylinder is fixedly connected with a spiral rod, the side wall of the outer cylinder is fixedly connected with a hopper near the left end, the bottom surface of the hopper is fixedly connected with a discharge pipe, the other end of the discharge pipe extends into the inner cylinder, the inner wall of the discharge pipe is rotatably connected with a blocking plate, and the front side wall of the discharge pipe is provided with an adjustment component;

[0008] The right end of the inner cylinder is rotatably connected with a fixed pipe, the side wall of the fixed pipe is located at the lower side and is fixedly connected with a discharge pipe, and the side wall of the discharge pipe is provided with a transmission component.

[0009] The waste collection assembly includes a collection tube fixedly connected to the side wall of the outer tube, the collection tube is communicated with the inner cavity of the outer tube, a baffle is movably connected to the bottom surface of the collection tube, a bolt is threadedly connected to the side wall of the baffle, and the bolt is threadedly connected to the collection tube.

[0010] The adjustment component includes a rotating shaft fixedly connected to the side wall of the sealing plate, the other end of the rotating shaft passes through the discharge pipe and is rotatably connected thereto, the front end of the rotating shaft is fixedly connected to a movable plate, the side wall of the movable plate is threadedly connected to a rotating wheel, a plurality of screw holes are opened on the front side wall of the discharge pipe, and the rotating wheel is threadedly connected to the screw holes.

[0011] The screw holes are distributed in an arc shape with the rotating shaft as the central axis.

[0012] The transmission assembly includes a fixed plate fixedly connected to the side wall of the outer cylinder, a motor is fixedly installed on the side wall of the fixed plate, a gear is fixedly connected to the motor output shaft, an annular rack is fixedly connected to the outer wall of the inner cylinder, and the gear is meshed with the annular rack.

[0013] The bottom surface of the hopper is inclined, a cover plate is provided at the top of the hopper, and a handle is fixedly connected to the top surface of the cover plate.

[0014] The technical effects achieved by this utility model are:

[0015] The practical rotary dryer cooperates with each other among the outer cylinder, the inner cylinder, the heating tube, the hopper, the discharge tube and the adjusting component. The real-time discharge amount of the discharge tube can be controlled by controlling the adjusting component, so that the dryer can adapt to different drying modes of plastic particles on site, and achieve the purpose of feeding, drying and discharging the plastic particles at the same time, thereby improving the drying effect and quality of the plastic particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of this practical embodiment;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of this practical embodiment;

[0018] Figure 3 This practical embodiment Figure 1 A in the enlarged view;

[0019] Figure 4 This practical embodiment Figure 2 Enlarged view of point B in .

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Outer tube; 2. Inner tube; 3. Heating tube; 4. Bracket; 5. Collecting tube; 6. Baffle; 7. Bolt; 8. Hopper; 9. Discharge tube; 10. Sealing plate; 11. Rotating shaft; 12. Movable plate; 13. Screw hole; 14. Rotating wheel; 15. Fixed tube; 16. Discharge tube; 17. Fixed plate; 18. Motor; 19. Gear; 20. Ring rack; 21. Screw rod; 22. Cover plate. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0023] like Figure 1-Figure 4 As shown, the rotary dryer comprises an outer cylinder 1 and an inner cylinder 2, the inner cylinder 2 is rotatably connected to the inner side of the outer cylinder 1, a plurality of heating tubes 3 are fixedly installed on the inner wall of the outer cylinder 1, a bracket 4 is fixedly connected at the lower side of the side wall of the outer cylinder 1, and a waste collection assembly is arranged at the lower side of the side wall of the outer cylinder 1;

[0024] The left end of the inner tube 2 is open, and the left end of the inner tube 2 passes through the outer tube 1 and is movably connected thereto, and the left end of the inner tube 2 is distributed in a stepped manner.

[0025] A plurality of leak holes are provided on the side wall of the inner cylinder 2, a spiral rod 21 is fixedly connected to the inner wall of the inner cylinder 2, a hopper 8 is fixedly connected to the side wall of the outer cylinder 1 near the left end, a discharge pipe 9 is fixedly connected to the bottom of the hopper 8, the other end of the discharge pipe 9 extends into the inner cylinder 2, a sealing plate 10 is rotatably connected to the inner wall of the discharge pipe 9, and an adjustment component is provided on the front side wall of the discharge pipe 9;

[0026] The right end of the inner tube 2 is rotatably connected with a fixed tube 15, and a discharge tube 16 is fixedly connected to the side wall of the fixed tube 15 at the lower side, and a transmission component is arranged on the side wall of the discharge tube 16.

[0027] like Figure 1 and Figure 2 As shown, the waste collection assembly includes a collecting tube 5 fixedly connected to the side wall of the outer tube 1, the collecting tube 5 is communicated with the inner cavity of the outer tube 1, a baffle 6 is movably connected to the bottom surface of the collecting tube 5, a bolt 7 is threadedly connected to the side wall of the baffle 6, and the bolt 7 is threadedly connected to the collecting tube 5.

[0028] Specifically, during the drying process of the plastic particles, if there are smaller particles or broken particles entangled in the plastic particles, they will enter the outer cylinder 1 through the filtering holes on the surface of the inner cylinder 2, and be collected in the collecting cylinder 5 by utilizing the curved surface of the outer cylinder 1. When a large amount of waste plastic particles are collected, the baffle 6 can be opened by the bolt 7 to discharge the waste particles for the convenience of recycling and reprocessing next time.

[0029] like Figure 1 and Figure 3 As shown, the adjustment component includes a rotating shaft 11 fixedly connected to the side wall of the sealing plate 10, the other end of the rotating shaft 11 passes through the discharge pipe 9 and is rotatably connected thereto, a movable plate 12 is fixedly connected to the front end of the rotating shaft 11, and a rotating wheel 14 is threadedly connected to the side wall of the movable plate 12. A plurality of screw holes 13 are provided on the front side wall of the discharge pipe 9, and the rotating wheel 14 is threadedly connected to the screw holes 13.

[0030] The screw holes 13 are distributed in an arc shape with the rotating shaft 11 as the central axis.

[0031] Among them, the angle between each screw hole 13 is fixed. By adjusting the position of the movable plate 12, the opening distance between the blocking plate 10 and the discharge pipe 9 can be controlled, thereby adapting to the drying and discharge of plastic particles under different conditions and increasing flexibility in the drying process.

[0032] like Figure 1 and Figure 4 As shown, the transmission assembly includes a fixed plate 17 fixedly connected to the side wall of the outer cylinder 1, a motor 18 is fixedly installed on the side wall of the fixed plate 17, a gear 19 is fixedly connected to the output shaft of the motor 18, and an annular rack 20 is fixedly connected to the outer wall of the inner cylinder 2, and the gear 19 is meshed with the annular rack 20.

[0033] Among them, the transmission component structures used in this solution are all commonly used structures in the prior art, and their operating principles are also very mature. In this solution, they are only used as transmission functions, so they will not be described in detail.

[0034] like Figure 1 As shown, the bottom surface of the hopper 8 is inclined, and a cover plate 22 is provided at the top of the hopper 8, and a handle is fixedly connected to the top surface of the cover plate 22. When the equipment is not running or there are many plastic particles in the hopper 8, the cover plate 22 can be closed, which can protect the plastic particles in the hopper 8 on the one hand, and prevent other substances such as impurities and dust in the external environment from affecting the plastic particles on the other hand.

[0035] The working principle of the utility model is as follows: firstly, the heating tube 3 is started for preheating, then the opening angle of the blocking plate 10 is adjusted according to the feeding amount of the plastic particles, the rotating wheel 14 is first reversed to release the fixation of the movable plate 12, then the movable plate 12 is rotated to a suitable angle, and then the rotating wheel 14 is forwardly rotated to screw it into a suitable screw hole 13, and the adjustment of the blocking plate 10 is completed;

[0036] Then the motor 18 is started, and the output shaft of the motor 18 drives the gear 19 to rotate. The gear 19 engages the annular rack 20 and drives the inner cylinder 2 to rotate. At this time, the plastic particles are discharged into the hopper 8 and enter the inner cylinder 2 through the discharge pipe 9 for drying. As the inner cylinder 2 rotates, the plastic particles are transported to the right with the help of the spiral rod 21. When the plastic particles are transported to the discharge pipe 16, they are in a dry state, achieving the purpose of drying and discharging at the same time, effectively improving the drying efficiency of the plastic particles.

[0037] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. Rotary dryer, characterized in that: It comprises an outer cylinder (1) and an inner cylinder (2), wherein the inner cylinder (2) is rotatably connected to the inner side of the outer cylinder (1), a plurality of heating tubes (3) are fixedly mounted on the inner wall of the outer cylinder (1), a bracket (4) is fixedly connected to the lower side of the side wall of the outer cylinder (1), and a waste collection assembly is arranged on the lower side of the side wall of the outer cylinder (1); The side wall of the inner cylinder (2) is provided with a plurality of leakage holes, the inner wall of the inner cylinder (2) is fixedly connected with a spiral rod (21), the side wall of the outer cylinder (1) is fixedly connected with a hopper (8) near the left end, the bottom surface of the hopper (8) is fixedly connected with a discharge pipe (9), the other end of the discharge pipe (9) extends into the inner cylinder (2), the inner wall of the discharge pipe (9) is rotatably connected with a blocking plate (10), and the front side wall of the discharge pipe (9) is provided with an adjustment component; The right end of the inner tube (2) is rotatably connected to a fixed tube (15), a side wall of the fixed tube (15) is fixedly connected to a discharge tube (16) at the lower side, and a transmission assembly is provided on the side wall of the discharge tube (16).

2. The rotary dryer according to claim 1, characterized in that: The waste collection assembly comprises a collection tube (5) fixedly connected to the side wall of the outer tube (1); the collection tube (5) is communicated with the inner cavity of the outer tube (1); a baffle (6) is movably connected to the bottom surface of the collection tube (5); a bolt (7) is threadedly connected to the side wall of the baffle (6); and the bolt (7) is threadedly connected to the collection tube (5).

3. The rotary dryer according to claim 1, characterized in that: The adjustment assembly comprises a rotating shaft (11) fixedly connected to the side wall of the blocking plate (10), the other end of the rotating shaft (11) passes through the feed pipe (9) and is rotatably connected thereto, the front end of the rotating shaft (11) is fixedly connected to a movable plate (12), the side wall of the movable plate (12) is threadedly connected to a rotating wheel (14), the front side wall of the feed pipe (9) is provided with a plurality of screw holes (13), and the rotating wheel (14) is threadedly connected to the screw holes (13).

4. The rotary dryer according to claim 3, characterized in that: The screw holes (13) are distributed in an arc shape with the rotating shaft (11) as the central axis.

5. The rotary dryer according to claim 1, characterized in that: The transmission assembly comprises a fixed plate (17) fixedly connected to the side wall of the outer cylinder (1), a motor (18) is fixedly mounted on the side wall of the fixed plate (17), a gear (19) is fixedly connected to the output shaft of the motor (18), an annular rack (20) is fixedly connected to the outer wall of the inner cylinder (2), and the gear (19) is meshed with the annular rack (20).

6. The rotary dryer according to claim 1, characterized in that: The bottom surface of the hopper (8) is arranged to be inclined, a cover plate (22) is arranged at the top of the hopper (8), and a handle is fixedly connected to the top surface of the cover plate (22).

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