Pneumatic drying device

Abstract

The utility model relates to the technical field of airflow drying, and particularly discloses an airflow drying device which comprises a barrel, a hot air nozzle is arranged at the bottom end of the barrel, a feeding port is formed in the side wall of the bottom of the barrel, a discharging port is formed in the top end of the barrel, and a Venturi pulse tube is installed in the barrel. The lower end of the venturi pulse tube is hinged to the inner wall of the bottom of the cylinder; the upper end of the venturi pulse tube is slidably arranged on the inner wall of the upper part of the cylinder; the upper end of the venturi pulse tube is connected with a driving assembly; the end, away from the Venturi pulse tube, of the driving assembly is arranged on the inner wall of the barrel. By arranging the driving assembly, the venturi pulse tube can be driven to rotate around the hinged position of the venturi pulse tube and the barrel, so that residual materials on the inner wall and the outer wall of the barrel fall off, material residues are reduced, and the yield is increased.

Description

Technical Field

[0001] This utility model relates to the field of airflow drying technology, and specifically discloses an airflow drying device. Background Technology

[0002] Airflow drying is often used for drying various starches, crystalline glucose, and functional sugars such as potatoes, cassava, and corn.

[0003] Venturi pulse tubes are commonly used in airflow drying. The basic principle of a Venturi pulse tube is to narrow the airflow, increasing its velocity. In airflow drying, heated air enters the contraction section of the Venturi pulse tube, where its velocity continuously increases, forming a high-speed airflow. This high-speed airflow rapidly draws in and accelerates the wet material entering the Venturi tube, ensuring thorough mixing of the material particles with the airflow. The Venturi pulse tube adds pulse characteristics to the drying gas, creating turbulence in the high-speed gas. As the airflow passes through the throat and diffuser section of the Venturi tube, changes in tube diameter cause pressure fluctuations and velocity variations, resulting in a pulsed airflow. This pulsed airflow allows for more thorough and frequent contact between the gas and solid phases, enhancing heat and mass transfer processes.

[0004] However, in existing airflow drying equipment, the Venturi pulse tubes are mostly fixed, and material residue often remains on the inner and outer walls, affecting the yield of finished products. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides an airflow drying device to solve the problem that most of the existing Chinese Churi pulse tubes are fixed, and material residues often remain on the inner and outer walls, affecting the yield of finished products.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] The airflow drying device includes a cylindrical body with a hot air nozzle at the bottom, a feed inlet on the bottom side wall, and a discharge outlet at the top. A Venturi pulse tube is installed inside the cylindrical body; the lower end of the Venturi pulse tube is hinged to the inner wall of the bottom of the cylindrical body; the upper end of the Venturi pulse tube is slidably disposed on the upper inner wall of the cylindrical body; a drive assembly is connected to the upper end of the Venturi pulse tube; the end of the drive assembly away from the Venturi pulse tube is disposed on the inner wall of the cylindrical body. The drive assembly can drive the Venturi pulse tube to rotate around its hinge point with the cylindrical body, causing residual material on the inner and outer walls of the cylindrical body to fall off, reducing material residue and improving the yield.

[0008] Preferably, the drive assembly includes an electric actuator; the cylinder of the electric actuator is hinged to the inner wall of the cylinder; the piston rod of the electric actuator is hinged to the upper edge of the Venturi pulse tube. The electric actuator drives the movement of the Venturi pulse tube.

[0009] Preferably, the Venturi pulse tube includes two telescopic rods; the two telescopic rods are symmetrically arranged on the outer peripheral wall of the upper end of the Venturi pulse tube; a sliding groove is provided on the inner wall of the cylinder to cooperate with the telescopic rods. The sliding groove and the telescopic rods ensure the stability of the sliding of the Venturi pulse tube.

[0010] Preferably, the telescopic rod is slidably disposed within a groove, and the groove is arc-shaped. This ensures the rotation of the Venturi pulse tube around its hinge point with the inner wall of the cylinder.

[0011] Preferably, a secondary hot air inlet is provided on the upper side wall of the cylinder; the secondary hot air inlet is tangentially arranged on the cylinder; the secondary hot air inlet and the electric push rod are symmetrically arranged with the cylinder axis as the center. This reduces the impact of the secondary hot air on the electric push rod. Larger particles that fail to exit from the discharge port are blown by the tangentially entering secondary hot air and spiral down the inner wall of the cylinder again. During this process, they are broken up by the inner wall of the cylinder and the outer wall of the Venturi pulse tube, and then enter the Venturi pulse tube again with the hot air entering from the hot air nozzle.

[0012] Preferably, the inner diameter of the lower opening of the Venturi pulse tube is larger than the inner diameter of the hot air nozzle; the outer diameter of the upper opening of the Venturi pulse tube is larger than the inner diameter of the discharge port.

[0013] Preferably, two circular tubes are symmetrically arranged on the lower outer wall of the Venturi pulse tube.

[0014] Preferably, a pin is provided on the outer wall of the cylinder; the pin passes through the side wall of the cylinder and is located inside the circular tube. This completes the hinge connection of the Venturi pulse tube on the cylinder.

[0015] Preferably, the lower opening of the Venturi pulse tube is higher than the feed inlet height, ensuring that most of the material enters the Venturi pulse tube.

[0016] Preferably, the venturi pulse tube is provided with several small-diameter sections and large-diameter sections; the several small-diameter sections and large-diameter sections are alternately arranged along the axial direction.

[0017] The beneficial effects of this utility model are:

[0018] This invention, by setting a driving component, can drive the Venturi pulse tube to rotate around its hinge with the cylinder, causing residual material on the inner and outer walls of the cylinder to fall off, reducing material residue and improving the yield. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 4 This is a partial exploded view of the Venturi pulse tube structure of this utility model.

[0023] Explanation of main figure symbols

[0024] 1-Cylinder body, 2-Venturi pulse tube, 3-Electric push rod, 4-Pin shaft;

[0025] 101-Hot air nozzle, 102-Inlet, 103-Outlet, 104-Groove, 105-Secondary hot air inlet; 201-Telescopic rod, 202-Round tube; 2011-Sleeve, 2012-Spring, 2013-Sleeve rod. Detailed Implementation

[0026] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1-4 As shown, an airflow drying device includes a cylindrical body 1. A hot air nozzle 101 is provided at the bottom end of the cylindrical body 1, a feed inlet 102 is provided on the bottom side wall of the cylindrical body 1, a discharge outlet 103 is provided at the top end of the cylindrical body 1, and a secondary hot air inlet 105 is provided on the upper side wall of the cylindrical body 1. The secondary hot air inlet 105 is tangentially arranged on the cylindrical body 1. A Venturi pulse tube 2 is installed inside the cylindrical body 1.

[0029] In the above configuration, the lower end of the Venturi pulse tube 2 is hinged to the inner wall of the bottom of the cylinder 1; two circular tubes 202 are symmetrically arranged on the lower outer wall of the Venturi pulse tube 2; a pin 4 is provided on the outer wall of the cylinder 1; the pin 4 passes through the side wall of the cylinder 1 and is located inside the circular tube 202. The upper end of the Venturi pulse tube 2 is slidably arranged on the upper inner wall of the cylinder 1; the Venturi pulse tube 2 includes two telescopic rods 201; the two telescopic rods 201 are symmetrically arranged on the outer peripheral wall of the upper end of the Venturi pulse tube 2; a sliding groove 104 is provided on the inner wall of the cylinder 1 to cooperate with the telescopic rods 201, and the sliding groove 104 is arc-shaped. The arrangement of the sliding groove 104 and the telescopic rods 201 ensures the stability of the sliding of the Venturi pulse tube 2. The telescopic rod 201 includes a sleeve 2011, which is welded to the outer wall of the venturi pulse tube 2. One end of a spring 2012 is welded to the bottom of the inner side of the sleeve 2011, and the other end of the spring 2012 is welded to a sleeve rod 2013. The sleeve rod 2013 is slidably disposed in the slide groove 104.

[0030] The Venturi pulse tube 2 is connected to a drive assembly at its upper end; the end of the drive assembly away from the Venturi pulse tube 2 is located on the inner wall of the cylinder 1. The drive assembly includes an electric push rod 3; the cylinder body of the electric push rod 3 is hinged to the inner wall of the cylinder 1, and a hinge seat is provided on the inner wall of the cylinder 1; the piston rod of the electric push rod 3 is hinged to the hinge seat at the upper edge of the Venturi pulse tube 2. The electric push rod 3 drives the Venturi pulse tube 2 to rotate around its hinge point with the cylinder 1, causing residual material on the inner and outer walls of the cylinder 1 to fall off, reducing material residue and improving the yield. In other alternative embodiments, the electric push rod 3 can be replaced by a pneumatic cylinder or a hydraulic cylinder. The secondary hot air inlet 105 and the electric push rod 3 are symmetrically arranged about the axis of the cylinder 1 to reduce the impact of the secondary hot air on the electric push rod 3.

[0031] The lower opening of the Venturi pulse tube 2 has an inner diameter larger than that of the hot air nozzle 101; the upper opening of the Venturi pulse tube 2 has an outer diameter larger than that of the discharge port 103. The lower opening of the Venturi pulse tube 2 is higher than the inlet 102, ensuring that most of the material enters the Venturi pulse tube 2. The Venturi pulse tube 2 has several small-diameter sections and large-diameter sections; these sections are alternately arranged along the axial direction.

[0032] In use, the material enters the cylinder 1 through the feed inlet 102 and enters the Venturi pulse tube 2 under the blowing of hot air from the hot air nozzle 101. Small particles are blown out from the discharge outlet 103. Some large particles fall back to the space between the Venturi pulse tube 2 and the inner wall of the cylinder 1. Under the blowing of secondary hot air from the secondary hot air inlet 105, they spiral down. During this process, they are broken by collision between the inner wall of the cylinder 1 and the outer wall of the Venturi pulse tube 2, and are then blown back into the Venturi pulse tube 2 by the hot air from the hot air nozzle 101.

[0033] After running for a period of time, the electric push rod 3 is started to drive the venturi pulse tube 2 to rotate around the hinge point between it and the cylinder 1, so that the residual material on the inner and outer walls of the cylinder 1 falls off, reducing material residue and improving the yield.

Claims

1. An air flow drying device, comprising a cylinder (1), the bottom end of the cylinder (1) is provided with a hot air nozzle (101), the bottom side wall of the cylinder (1) is provided with a feeding port (102), and the top end of the cylinder (1) is provided with a discharging port (103), characterized in that, A Venturi pulse pipe (2) is mounted in the barrel (1); the lower end of the Venturi pulse pipe (2) is hinged to the inner wall of the bottom of the barrel (1); the upper end of the Venturi pulse pipe (2) is slidingly arranged on the inner wall of the upper portion of the barrel (1); the upper end of the Venturi pulse pipe (2) is connected with a driving assembly; the end of the driving assembly away from the Venturi pulse pipe (2) is arranged on the inner wall of the barrel (1).

2. The through-air drying apparatus of claim 1 wherein, The driving assembly comprises an electric push rod (3); the cylinder body of the electric push rod (3) is hinged to the inner wall of the barrel (1); the piston rod of the electric push rod (3) is hinged to the edge of the upper end of the Venturi pulse pipe (2).

3. The through-air drying apparatus of claim 2, wherein, The Venturi pulse pipe (2) comprises two telescopic rods (201); the two telescopic rods (201) are symmetrically arranged on the outer peripheral wall of the upper end of the Venturi pulse pipe (2); the inner wall of the barrel (1) is provided with a sliding groove (104) matched with the telescopic rod (201).

4. The through-air drying apparatus of claim 3, wherein, The telescopic rod (201) is slidingly arranged in the sliding groove (104), and the sliding groove (104) is arranged in an arc shape.

5. The through-air drying apparatus of claim 4, wherein, A secondary hot air inlet (105) is formed in the sidewall of the upper portion of the barrel (1); the secondary hot air inlet (105) is tangentially arranged on the barrel (1); the secondary hot air inlet (105) and the electric push rod (3) are symmetrically arranged with the axis of the barrel (1) as the center.

6. The through-air drying apparatus of claim 1 wherein, The inner diameter of the lower end opening of the Venturi pulse pipe (2) is greater than the inner diameter of the hot air nozzle (101); the outer diameter of the upper end opening of the Venturi pulse pipe (2) is greater than the inner diameter of the discharge port (103).

7. The through-air drying apparatus of claim 1 wherein, Two circular tubes (202) are symmetrically arranged on the outer wall of the lower portion of the Venturi pulse pipe (2).

8. The through-air drying apparatus of claim 7, wherein, A pin shaft (4) is arranged on the outer wall of the barrel (1); the pin shaft (4) penetrates through the sidewall of the barrel (1) and is arranged in the circular tube (202).

9. The through-air drying apparatus of claim 1 wherein, The height of the lower end opening of the Venturi pulse pipe (2) is higher than the height of the feeding port (102).

10. The through-air drying apparatus of claim 1 wherein, The Venturi pulse pipe (2) is provided with a plurality of small-diameter portions and large-diameter portions; the plurality of small-diameter portions and large-diameter portions are alternately arranged along the axial direction.

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