A new vegetable processing spin dryer

Abstract

This utility model discloses a novel centrifugal dryer for vegetable processing, comprising a shell and a mounting frame. A horizontally rotating centrifugal drying drum is located inside the shell, with dehydration holes in its inner cylinder. Inside, there are stirring blades coated with polytetrafluoroethylene (PTFE). The distance between the outer edge of the blades and the cylinder wall is adjustable from 0-20mm, and the blades have arrayed buffer ribs on their material-facing surfaces. The mounting frame houses a drive motor, connected to the rotating shaft of the centrifugal drying drum via a belt drive mechanism. A feeding hopper is located at the top of the shell, and a discharge port with a sealed opening and closing door is located on the side. A first blower is installed in the bottom drainage trough, equipped with a conical guide shroud for upward blowing. A second blower and an axially opposed exhaust pipe are located on the side wall, forming a transverse drying channel. A double-layer filter is installed at the inlet end of the exhaust pipe. This equipment achieves a synergistic effect of centrifugal dehydration and through-flow drying, significantly improving dehydration efficiency and product quality, and solving problems such as vegetable damage, adhesion, and drainage blockage.

Description

Technical Field

[0001] This utility model relates to the field of vegetable processing, and in particular to a novel spin dryer for vegetable processing. Background Technology

[0002] Currently, dehydrated vegetables, also known as rehydrated vegetables, are a type of dried vegetable made by washing, drying, and other processing of fresh vegetables to remove most of the water content. The original color and nutritional components of the vegetables are basically preserved. They are easy to store and transport, and can effectively regulate the peak and off-peak seasons of vegetable production. When eating, they can be rehydrated by soaking them in clean water, while retaining the original color, nutrition, and flavor of the vegetables.

[0003] Most existing spin dryers work on the principle of centrifugation to quickly remove moisture from vegetables. While the technology has matured with advancements, existing spin dryer technology still has several drawbacks, such as: 1. Incomplete dehydration: Traditional equipment relies solely on centrifugal force to drain water, failing to remove the water film adsorbed on the vegetable surface. Residual moisture increases energy consumption for subsequent processing (e.g., cold chain preservation) and easily breeds microorganisms; 2. Material damage and adhesion: During high-speed rotation, vegetables collide directly with metal blades, causing mechanical damage (e.g., leafy vegetables break); simultaneously, starchy vegetables (e.g., potato slices) easily adhere to the drum wall in high humidity environments, reducing efficiency and requiring frequent shutdowns for cleaning; 3. Drainage system blockage: Impurities (vegetable leaves, sand) ejected by centrifugation easily accumulate in dead corners of the drainage trough, leading to blockages and hygiene risks over time; 4. Existing equipment lacks an integrated drying module, often requiring a series of independent dryers to meet dehydration standards, occupying space and doubling energy consumption. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a new type of spin dryer for vegetable processing.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a novel spin dryer for vegetable processing, comprising an outer shell and a fixed frame below the outer shell. A rotatable spin dryer is horizontally arranged inside the outer shell, and the spin dryer includes an inner cylinder with dehydration holes and stirring blades fixed inside the inner cylinder. A drive motor is installed on the fixed frame, and the drive motor is connected to the rotating shaft of the spin dryer through a belt drive mechanism. A feeding hopper is provided at the top of the outer shell, and a discharge port with a door opening and closing assembly is provided on the side. A drainage trough is fixed at the bottom of the outer shell, and a first blower is installed at the bottom of the drainage trough. A second blower is provided on one side wall of the outer shell, and an exhaust pipe is provided on the opposite side wall. The inlet end of the exhaust pipe and the outlet of the second blower are arranged opposite each other along the same axis, forming a transverse drying channel that penetrates the internal cavity of the outer shell.

[0007] As a preferred technical solution of this utility model, the stirring blades are symmetrically distributed along the axial direction of the inner cylinder, the surface of the blades is covered with a polytetrafluoroethylene anti-stick coating, and the distance between the outer edge of the blades and the inner wall of the inner cylinder can be adjusted within the range of 0-20mm by adjusting bolts.

[0008] As a preferred technical solution of this utility model, the stirring blade is provided with an array of buffer ribs on the material-facing surface; the buffer ribs are horizontally distributed, and their height is 1.5 to 3 times the thickness of the stirring blade, and the spacing between adjacent buffer ribs is 2 to 4 times the width of a single buffer rib; a gap is formed between adjacent buffer ribs to allow vegetables to pass through.

[0009] As a preferred embodiment of the present invention, the belt drive mechanism includes: a first pulley installed on the output shaft of the drive motor; a second pulley fixed to the end of the spin dryer shaft; and a closed protective cover covering the outside of the first pulley and the second pulley, wherein a maintenance window with a sealing ring is opened on the side wall of the protective cover.

[0010] As a preferred embodiment of this utility model, the door opening and closing assembly includes: a door panel rotatably connected to the discharge port via a hinge; a knob-type locking valve located on the outside of the door panel; and a U-shaped silicone sealing strip embedded in the inner edge of the door panel, wherein the compression deformation of the sealing strip is 20%-30% of its free height.

[0011] As a preferred technical solution of this utility model, the air outlet of the first blower faces upward and is directly opposite the bottom surface of the drainage trough, and the outlet end of the first blower is connected to an annular guide shroud, which is a conical flared structure with an inlet diameter smaller than the outlet diameter.

[0012] As a preferred technical solution of this utility model, the inlet end of the exhaust pipe extends to a distance of 10-20mm from the side wall of the spin dryer in the inner cavity of the outer shell. The inlet end is fixed with a detachable double-layer stainless steel filter screen by a buckle. In the double-layer stainless steel filter screen, the outer filter screen facing the airflow direction has a pore size of 2mm to 3mm, and the inner filter screen has a pore size of 0.1mm to 0.5mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The horizontal air drying channel (with the second blower and exhaust pipe facing each other) generates a directional airflow that runs through the spin dryer, forcibly peeling off the water film adsorbed on the surface of the vegetables, reducing residual moisture by more than 40% (compared to single centrifugal dehydration).

[0015] 2. The PTFE non-stick coating on the stirring blades reduces adhesion by 90%, making it especially suitable for high-starch vegetables; the adjustable spacing design (0-20mm range) combined with the buffer rib array makes it suitable for a variety of vegetables;

[0016] 3. The first blower, in conjunction with the conical guide shroud (a flared structure with a small inlet and a large outlet), sprays air upwards, creating a turbulent effect at the bottom of the drainage channel, reducing sludge deposition by 80% and eliminating the risk of blockage. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is the front view of this utility model;

[0020] Figure 3 This is a side view of the present invention;

[0021] Figure 4 This is a cross-sectional structural diagram AA of this utility model;

[0022] Figure 5 BB is a cross-sectional structural diagram of this utility model;

[0023] In the diagram: 1. Outer shell; 2. Fixing frame; 3. Spin-drying drum; 4. Drive motor; 5. Second blower; 6. Exhaust pipe; 11. Feed hopper; 12. Discharge port; 13. Door opening and closing assembly; 14. Drainage trough; 15. First blower; 16. Flow guide; 31. Inner cylinder; 32. Agitator blades; 33. First pulley; 34. Second pulley; 35. Protective cover; 61. Stainless steel filter screen; 131. Hinge; 132. Door panel; 133. Locking valve; 134. Sealing strip; 321. Buffer rib. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] In the attached diagram, all identical reference numerals refer to the same components.

[0026] like Figure 1-5 As shown, this utility model provides a novel spin dryer for vegetable processing. The following are specific embodiments written in accordance with the requirements of the patent documents, including three detailed embodiments.

[0027] Example 1: High-efficiency dehydration of leafy vegetables (spinach / lettuce)

[0028] Spin-drying drum 3: The two ends of the inner cylinder 31 shaft are mounted on the side wall of the outer shell 1 through tapered roller bearings (the outer ring of the bearing is transitionally fitted with the bearing seat hole of the outer shell 1 H7 / m6, and the inner ring is interference-fitted with the shaft by 0.03mm), and the axial preload of the bearing is 0.2kN; the base plate of the stirring blade 32 is fixedly connected to the shaft of the inner cylinder 31 by a pin, and the adjusting bolt (M10×1.5) of the stirring blade 32 passes through the blade base and tightens the hardened gasket of the inner cylinder wall to achieve a distance of 20mm±0.5mm between the outer edge of the blade and the cylinder wall (the torque of the locking nut is 15N·m).

[0029] Air drying channel: The flange of the second blower 5 is fixed to the side wall of the outer shell 1 by 6 M8 bolts (a 2mm thick fluororubber gasket is installed on the flange face for sealing); the inlet end of the exhaust pipe 6 extends into the inner cavity of the outer shell 1, and a double-layer stainless steel filter screen is pressed in by a ring clamp (20mm wide) (the outer filter screen has a hole diameter of 2.5mm, the inner layer has a hole diameter of 0.3mm, and the gap between the filter screen frame and the socket of the exhaust pipe 6 is ≤0.1mm).

[0030] The workflow is as follows: The output shaft of the drive motor 4 is connected to the first pulley 33 via a flat key (10×8×50), which drives the second pulley 34 to rotate (belt tension 180N); the buffer ribs (4mm high, 9mm spacing) block the spinach leaves, and the polytetrafluoroethylene coating (50μm thick) on the surface of the leaves prevents them from sticking during centrifugal dehydration; the airflow (wind speed 12m / s) of the second blower 5 penetrates the spin dryer 3, and 95% of the debris is intercepted when passing through the exhaust pipe 6 and the filter screen 61.

[0031] Example 2: Anti-sticking and dehydration of high-starch root vegetables (potato chips)

[0032] Stirring blade 32: Adjusting bolts reduce the blade-cylinder wall distance to 5mm, and the surface of the hardened gasket at the end of the bolt is chrome-plated (0.1mm thick) to prevent wear; the buffer ribs are fully welded to the blade base plate and polished (the surface roughness of the weld Ra≤3.2μm).

[0033] Exhaust duct 6: Replace the inner filter with a 0.1mm aperture (laser spot welding to the frame, weld spacing 15mm); the inlet end of exhaust duct 6 is 10mm away from the side wall of the spin dryer 3 (coaxiality φ0.1mm).

[0034] Anti-sticking verification: When the stirring blade 32 rotates (1000r / min), the surface coating reduces the adhesion of potato slices by 92%; 40℃ hot air diffuses through the conical guide shroud 16 (outlet diameter = inlet diameter × 1.8) and covers the entire bottom surface of the drainage trough 14, with sludge residue <1g / cm².

[0035] Example 3: Anti-clogging operation of vegetables with high silt content (carrots with silt)

[0036] Drainage trough 14: The bottom surface is inclined at 10° and welded to the outer shell 1; The base of the first blower 15 is connected to the drainage trough by 4 M8 bolts (the bolts are coated with thread locking agent), and the air outlet is transitionally fitted with the small end of the guide shroud 16 (gap 0.05mm, O-ring seal is added).

[0037] Filter 61 quick release: After processing is completed, the first blower 15 starts for 3 minutes, and the airflow (2.5m / s) passes through the flared end of the guide shroud 16 (cone angle 60°) and lifts the mud and sand on the bottom of the drainage trough 14, and the silt is discharged along the slope; When the amount of mud accumulated in the exhaust pipe 6 and filter 61 reaches 80g, the buckle unlocking force is ≤20N to achieve manual disassembly.

[0038] The U-shaped silicone sealing strip 134 has a compression of 2mm (free height 8mm → compressed height 6mm). When closing the door, the knob locks the valve 133, which rotates 120° to generate a sealing force of 0.5kN. The protective cover 35 maintenance window uses a quick-release handwheel, which, when tightened, compresses the fluororubber sealing ring by 1.2mm to achieve dust prevention.

[0039] This utility model is a new type of spin dryer for vegetable processing, which integrates four technologies: centrifugal dehydration, through-type air drying, dynamic anti-clogging, and intelligent anti-sticking. It completely solves the industry pain points such as high breakage, dehydration residue, and redundant energy consumption in vegetable processing. It is especially suitable for scenarios with strict requirements for moisture content, such as quick-frozen vegetables and clean vegetable processing, and has significant economic and social benefits.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel spin dryer for vegetable processing, comprising a housing (1) and a fixing frame (2) fixed below the housing (1), characterized in that: A rotatable spin-drying drum (3) is horizontally arranged inside the outer shell (1). The spin-drying drum (3) includes an inner cylinder (31) with dehydration holes and stirring blades (32) fixed inside the inner cylinder (31). A drive motor (4) is installed on the fixed frame (2). The drive motor (4) is connected to the rotating shaft of the spin-drying drum (3) through a belt drive mechanism. A feed hopper (11) is provided at the top of the outer shell (1), and a discharge port (12) with a door opening and closing assembly (13) is provided on the side. A drainage trough (14) is fixed at the bottom of the outer shell (1), and a first blower (15) is installed at the bottom of the drainage trough (14). A second blower (5) is provided on one side wall of the outer shell (1), and an exhaust pipe (6) is provided on the opposite side wall. The inlet end of the exhaust pipe (6) and the outlet of the second blower (5) are arranged opposite each other along the same axis direction. The two form a transverse drying channel that penetrates the internal cavity of the outer shell (1).

2. The novel spin dryer for vegetable processing according to claim 1, characterized in that, The stirring blades (32) are symmetrically distributed along the axial direction of the inner cylinder (31). The surface of the blades is covered with a polytetrafluoroethylene anti-stick coating, and the distance between the outer edge of the blades and the inner wall of the inner cylinder (31) can be adjusted within the range of 0-20mm by adjusting bolts.

3. A novel spin dryer for vegetable processing according to claim 2, characterized in that, The stirring blade (32) has an array of buffer ribs (321) on its feeding surface; the buffer ribs (321) are horizontally distributed, the height of the buffer ribs (321) is 1.5 to 3 times the thickness of the stirring blade (32), and the spacing between adjacent buffer ribs (321) is 2 to 4 times the width of a single buffer rib (321); a gap is formed between adjacent buffer ribs (321) for vegetables to pass through.

4. A novel spin dryer for vegetable processing according to claim 1, characterized in that, The belt drive mechanism includes: a first pulley (33) installed on the output shaft of the drive motor (4); a second pulley (34) fixed at the end of the shaft of the spin dryer (3); and a closed protective cover (35) covering the outside of the first pulley (33) and the second pulley (34), wherein the side wall of the protective cover (35) has a maintenance window with a sealing ring.

5. A novel spin dryer for vegetable processing according to claim 1, characterized in that, The door opening and closing assembly (13) includes: a door panel (132) rotatably connected to the discharge port (12) via a hinge (131); a knob-type locking valve (133) located on the outside of the door panel (132); and a U-shaped silicone sealing strip (134) embedded in the inner edge of the door panel (132), wherein the compression deformation of the sealing strip (134) is 20%-30% of its free height.

6. A novel spin dryer for vegetable processing according to claim 1, characterized in that, The air outlet of the first blower (15) faces upward and is directly opposite the bottom surface of the drain trough (14). The outlet end of the first blower (15) is connected to an annular guide shroud (16), which is a conical flared structure with an inlet diameter smaller than the outlet diameter.

7. A novel spin dryer for vegetable processing according to claim 1, characterized in that, The inlet end of the exhaust pipe (6) extends to the inner cavity of the outer shell (1) at a distance of 10-20mm from the side wall of the spin dryer (3). The inlet end is fixed with a detachable double-layer stainless steel filter (61) by a buckle. In the double-layer stainless steel filter (61), the outer filter with a pore size of 2mm to 3mm facing the airflow direction has a pore size of 0.1mm to 0.5mm.

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