A drum-type cleaning device for dehydrated onion processing

Abstract

This utility model relates to a drum-type cleaning device for dehydrated onion processing, comprising: an outer drum; an inner drum, which is a flexible structural component, sleeved inside the outer drum and fixedly connected to the outer drum by multiple annular flexible connectors, the annular flexible connectors being spaced apart along the axial direction of the drum; a sandwich layer, disposed between the inner and outer drums, with adjacent two annular flexible connectors, the inner drum, and the outer drum together defining several annular sandwich layers; elastic cleaning balls, disposed within the annular sandwich layers, the elastic cleaning balls being adapted to the annular sandwich layers so that they can rotate and roll with the drum within the corresponding annular sandwich layers, thereby reducing the contact impact between the onions and the inner drum and performing friction cleaning; a spray structure, disposed above the inner drum, for spraying circulating water onto the onions during the cleaning process; several through holes are provided on the outer drum and the inner drum; and a drainage structure, disposed below the inner drum.

Description

Technical Field

[0001] This utility model relates to the field of food processing equipment technology, and in particular to a drum-type cleaning device for dehydrated onion processing. Background Technology

[0002] Dehydrated onions are a type of vegetable product made from fresh onions through washing, slicing, dehydration, and drying. They are widely used in seasonings, convenience foods, and as raw materials in the food industry. Dehydrated onions offer advantages such as ease of storage and transportation, long shelf life, and convenient use, and therefore occupy an important position in the food industry.

[0003] However, in the processing of dehydrated onions, the washing stage is crucial for preserving the integrity of the raw materials. Onions have a soft structure and thin outer skin, making them highly susceptible to damage from bumps or pressure. If mechanical damage occurs during washing, the damaged areas are more prone to enzymatic browning or oxidation reactions during subsequent dehydration or drying, resulting in noticeable color differences or uneven discoloration in the finished product, severely impacting the sensory quality and commercial value of the dehydrated product.

[0004] Therefore, there is a need for a drum-type washing equipment for dehydrated onion processing that can effectively avoid damage to the material during the washing process, reduce discoloration after dehydration due to breakage, and improve the product consistency and grade of dehydrated onions. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a liquid level detection-based infusion early warning device, specifically a drum-type cleaning device for dehydrated onion processing, comprising: an outer drum; an inner drum, a flexible structural component, sleeved inside the outer drum and fixedly connected to the outer drum by multiple annular flexible connectors, the annular flexible connectors being spaced apart along the axial direction of the drum; a sandwich layer disposed between the inner drum and the outer drum, with adjacent annular flexible connectors, the inner drum, and the outer drum collectively defining several annular sandwich layers; elastic cleaning balls disposed within the annular sandwich layers, the elastic cleaning balls being adapted to the annular sandwich layers so as to rotate and roll with the drum within the corresponding annular sandwich layers, thereby reducing the contact impact between the onion and the inner drum and performing friction cleaning; a spray structure disposed above the inner drum for spraying circulating water onto the onion during the cleaning process; and a drainage structure disposed below the inner drum for collecting and discharging cleaning wastewater.

[0006] In one possible implementation, the inner roller has several openings on its wall, the size of which is smaller than the diameter of the elastic cleaning ball, so that the elastic cleaning ball can partially extend out of the inner roller and come into direct contact with the onion, thereby improving the cleaning effect.

[0007] In one possible implementation, the outer surface of the elastic cleaning ball is provided with a plurality of protrusions.

[0008] In one possible implementation, the opening edge of the inner roller is folded outward to form a limiting structure to prevent the elastic cleaning ball from detaching from the inner roller.

[0009] In one possible implementation, the system further includes a frame, which is a portal frame structure. The frame includes: uprights, arranged in pairs and opposite to each other on both sides of the outer roller, each upright having a bearing seat for mounting the end shaft of the outer roller so that both ends of the outer roller are rotatably supported by the uprights; and a crossbeam connected to the upper end of the uprights and spanning above the outer roller, with the spray structure fixed to the crossbeam.

[0010] In one possible implementation, a motor is also included, which is fixed to the frame. The output end of the motor is connected via a coupling to a drive ring disposed on the outer periphery of the outer roller, so as to drive the outer roller to rotate and cause the inner roller to rotate accordingly.

[0011] In one possible implementation, the frame further includes a base, the column is fixed to the base, and the base is provided with vibration damping supports to reduce operating vibration.

[0012] In one possible implementation, the spray structure includes a plurality of nozzles arranged along the crossbeam, the nozzles being uniformly distributed in an arc array relative to the inner roller, and the spraying direction pointing towards the central region of the inner roller, so as to achieve full coverage rinsing of the onions inside the roller.

[0013] In one possible implementation, the spray structure is connected to a circulating water tank via a pipeline. The circulating water tank is pressurized by a water pump and returns the cleaning water to the spray nozzle to achieve the recycling of the cleaning water. The circulating water tank is equipped with a detachable filter assembly to remove impurities from the returned water.

[0014] In one possible implementation, the drainage structure includes a water collection trough located below the inner roller and a removable filter screen arranged on the water collection trough. The bottom of the water collection trough has a guide angle toward the drain outlet to accelerate the discharge of washing wastewater and intercept onion peels and debris.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Based on the above technical solution, the drum-type cleaning equipment for dehydrated onion processing provided by this utility model features a flexible inner drum inside an outer drum, connected axially by multiple annular flexible connectors, forming multiple independent annular sandwich layers between the inner and outer drums. Elastic cleaning balls are placed within each annular sandwich layer. The rotation of the entire drum causes these cleaning balls to roll within the annular sandwich layer, generating continuous impact and friction against the inner wall of the inner drum. Because the inner drum has a flexible structure, when the onion comes into contact with it, it can absorb some of the impact force through flexible deformation. Simultaneously, the elastic cleaning balls achieve gentle scrubbing through rolling friction, providing both buffering and cleaning effects. A spray structure is located above the inner drum, continuously spraying water onto the onions during drum rotation, wetting the onion surface and removing attached impurities. A drainage structure is located below the inner drum, collecting and discharging wastewater promptly to prevent water accumulation from affecting the cleaning process. Therefore, this structure achieves both effective cleaning of the onion surface and reduced mechanical damage during the cleaning process, while improving cleaning and water efficiency through circulating water spraying and centralized drainage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the drum-type cleaning equipment for dehydrated onion processing provided in this embodiment of the utility model; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the device shown.

[0018] Explanation of reference numerals in the attached figures: 1. Outer roller; 2. Inner roller; 3. Annular flexible connector; 4. Annular interlayer; 5. Elastic cleaning ball; 6. Spray structure; 7. Drainage structure; 8. Opening; 9. Protrusion; 10. Limiting structure; 11. Frame; 12. Motor; 13. Base; 14. Circulating water tank. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] Figure 1 A schematic diagram of the structure of the drum-type cleaning equipment for dehydrated onion processing provided in this embodiment of the utility model; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the device shown.

[0024] Please see Figure 1-2In one possible embodiment, a drum-type cleaning device for dehydrated onion processing includes an outer drum 1 and an inner drum 2, which is a flexible structural component, fitted inside the outer drum 1 and fixedly connected to the outer drum 1 by multiple annular flexible connectors 3, which are spaced apart along the axial direction of the drum. A sandwich is formed between the inner drum 2 and the outer drum 1, and adjacent annular flexible connectors 3, together with the inner drum 2 and the outer drum 1, define several annular sandwiches 4. Multiple elastic cleaning balls 5 are disposed within the annular sandwiches 4 and match the sandwiches, allowing them to roll within the sandwiches as the drums rotate, thereby reducing impact and generating a frictional cleaning effect when the onions come into contact with the inner drum 2. A spray structure 6 is provided above the inner drum 2 to spray circulating water onto the onions during the cleaning process; a drainage structure 7 is provided below the inner drum 2 to collect and discharge cleaning wastewater.

[0025] During operation, the outer roller 1 rotates under the drive of the drive unit, which in turn causes the inner roller 2 to rotate synchronously. The elastic cleaning ball 5 rolls within the corresponding annular interlayer 4, and through the flexible support structure formed with the inner roller 2, it gently rubs and washes the onion. The spray structure 6 evenly sprays circulating water onto the surface of the onion, which, combined with the rolling friction of the cleaning ball, removes dirt and impurities. Subsequently, the wastewater is collected and discharged through the drainage structure 7.

[0026] This equipment enables gentle cleaning of onions, better protecting the onion skin and reducing mechanical damage compared to traditional hard cleaning methods. At the same time, the rolling action of the elastic cleaning ball 5 improves the uniformity of cleaning. The spray and drainage structure 7 work together to make the cleaning process efficient and allow water resources to be recycled, thereby improving the overall cleaning effect and the applicability of the equipment.

[0027] In the above embodiments, the flexible structure of the inner roller 2 can be made of rubber composite material, thermoplastic polyurethane or other flexible polymers to meet cleaning requirements of different intensities; the spacing of the annular flexible connector 3 can be adjusted according to the equipment size and cleaning requirements; the elastic cleaning ball 5 can be made of rubber ball, silicone ball or polyurethane foam ball, and the diameter can be selected according to the onion specifications; the spray structure 6 can adopt a variety of nozzle forms and can be optimized according to different water pressure conditions; the drainage structure 7 can also be further improved by adding a filter screen or a flow guiding device to improve the drainage and impurity separation effect.

[0028] Please see Figure 1-2In one possible implementation, the inner roller 2 has a plurality of openings 8 evenly distributed on its wall. The size of the openings 8 is designed to be smaller than the diameter of the elastic cleaning ball 5, so that during the cleaning process, the elastic cleaning ball 5 can partially extend through the openings 8 to the outer surface of the roller and make direct contact with the onion when the roller rotates. With this structure, the onion is subjected to the impact of water flow while also receiving the frictional cleaning effect from the elastic cleaning ball 5, thereby achieving more efficient and thorough cleaning through multiple actions.

[0029] During the washing process, the drum continuously tumbles the onions, and the extended elastic cleaning balls 5 repeatedly contact the onion surface, effectively removing dirt, impurities, and detached skin. Because the elastic cleaning balls 5 are soft and compressible, they generate sufficient friction when in contact with the onions while avoiding damage to the onion's skin, thus balancing cleaning intensity and protective effect. Combined with the spray water flow, this further enhances the rinsing efficiency of impurities and prevents secondary adhesion of impurities inside the drum.

[0030] In the above embodiments, the shape of the opening 8 can be designed in various ways, such as round holes, oval holes, or strip-shaped holes, to accommodate elastic cleaning balls 5 of different sizes. The openings 8 can be arranged equidistantly to ensure that every part of the onion surface is in contact with the cleaning ball; or they can be arranged in a staggered manner to give the onion a more complex friction path during tumbling, thus enhancing the thoroughness of cleaning. To extend the service life, the edges of the openings 8 can be treated with flanges or rounded corners to prevent the elastic cleaning balls 5 from wearing or breaking due to long-term friction from sharp edges.

[0031] Please see Figure 2 In one possible implementation, the outer surface of the elastic cleaning ball 5 is provided with a plurality of protrusions 9, which are evenly distributed on the surface of the cleaning ball and integrally formed with the elastic material of the cleaning ball. This structure can create a dotted friction effect when the ball comes into contact with the onion during the cleaning process, which can provide a stronger scrubbing effect compared to a smooth surface, and helps to quickly peel off the mud, impurities and some loose outer skin attached to the onion skin.

[0032] During cleaning, the cleaning balls roll within the annular interlayer 4 as the roller rotates, with some balls extending beyond the opening 8 of the inner roller 2 to directly contact the onion. The raised dots 9 continuously generate alternating dotted and linear friction against the onion surface during rolling, enhancing localized cleaning intensity while preventing widespread damage to the skin caused by large-area contact. Because the raised dots 9 are made of flexible material, they deform upon contact with the onion, increasing friction while dispersing pressure, further reducing the risk of the onion breaking.

[0033] In the above embodiments, the shape of the protrusions 9 can be designed as hemispherical, conical, or polygonal, and their size can be adjusted according to the average diameter and surface roughness of the onion. To ensure cleaning effectiveness, the height of the protrusions 9 is generally set between 5% and 15% of the diameter of the cleaning ball. The number of protrusions 9 can be selectively increased or decreased according to the diameter of the cleaning ball. For example, a cleaning ball with a larger diameter can have more protrusions 9 to increase the contact area, while a cleaning ball with a smaller diameter can have fewer protrusions 9 to maintain softness and elasticity.

[0034] Please see Figure 2 In one possible implementation, the edge of the opening 8 of the inner roller 2 is folded outward to form a limiting structure 10. The limiting structure 10 is continuously or intermittently distributed along the periphery of the opening 8, and is used to constrain the elastic cleaning ball 5 as it extends out of the roller, preventing the cleaning ball from falling out of the roller. This design ensures that the cleaning ball remains in a stable position when it extends and comes into direct contact with the onion, and will not fall off due to the high-speed rotation of the roller or the impact of the onion accumulation.

[0035] Specifically, the elastic cleaning ball 5 extends out of the roller wall through the opening 8. When the roller causes the cleaning ball to rub against the onion, the limiting structure 10 provides support and constraint, keeping the cleaning ball in a semi-embedded state. This fully utilizes the friction cleaning function of the protruding part of the cleaning ball while preventing the cleaning ball from being pushed out of the roller when squeezed by the onion or subjected to centrifugal force, ensuring the long-term stable operation of the equipment.

[0036] In the above embodiments, the folding angle of the limiting structure 10 can be adjusted according to the size of the opening 8 and the diameter of the cleaning ball, for example, it can be selected between 15° and 45° to balance the extension depth and stability of the cleaning ball. The cross-sectional shape of the limiting structure 10 can be arc-shaped, trapezoidal, or rounded, which can both physically limit the movement and reduce wear on the surface of the cleaning ball. To further improve durability, the edge of the limiting structure 10 can also be covered with a flexible material or coated with a wear-resistant layer to reduce surface damage caused by long-term friction of the cleaning ball.

[0037] It is worth noting that the limiting structure 10 can be either a continuous flange, forming a complete annular flange along the entire edge of the opening 8, or a segmented limiting structure, where limiting protrusions are only provided along a portion of the edge of the opening 8. Both forms can effectively prevent the cleaning ball from coming out, and different forms can be flexibly selected according to manufacturing processes and maintenance needs.

[0038] Please see Figure 1In one possible implementation, the equipment further includes a frame 11, which adopts a portal frame structure and mainly consists of columns and crossbeams. The columns are arranged in pairs on both sides of the outer roller 1, and each column is equipped with a bearing seat for mounting the rotating shaft at the end of the outer roller 1, allowing the two ends of the outer roller 1 to be reliably rotatably supported on the columns. A crossbeam connects to the upper ends of the two columns, spanning across the outer roller 1, and the spray structure 6 is fixedly installed on the crossbeam, thereby achieving stable spray cleaning of the onions inside the roller.

[0039] Specifically, the columns provide robust support for the rollers and withstand the radial and axial loads generated during roller rotation; the crossbeams serve as a stable connection for the overall structure and also act as a fixed base for the spray structure 6, ensuring that the nozzles are positioned at the appropriate cleaning angle and height, guaranteeing that the spray water covers the entire internal area of ​​the inner roller 2. Because the frame 11 adopts a portal frame structure, the overall stress is balanced, facilitating installation and maintenance, and also contributing to the stability of the equipment during operation, preventing a decrease in cleaning effectiveness due to vibration or uneven loading.

[0040] In the above embodiments, the columns can be made of steel or aluminum alloy profiles, possessing sufficient strength and rigidity. To improve corrosion resistance, the surfaces of the columns and beams can be treated with anti-rust coatings or made of stainless steel to adapt to humid cleaning environments. The bearing housings preferably employ a replaceable structure for easy maintenance and replacement after long-term operation. The cross-sectional shape of the beams can be rectangular tubing, I-beams, or channel steel, selected based on the weight of the spray structure 6 and the installation method.

[0041] Please see Figure 1 In one possible implementation, the device further includes a motor 12, which is fixedly mounted on the frame 11. The output end of the motor 12 is connected to a drive ring disposed on the outer periphery of the outer roller 1 via a coupling. When the motor 12 is in operation, it drives the drive ring to rotate, thereby causing the outer roller 1 to rotate around its axis, which in turn drives the inner roller 2 to rotate accordingly, realizing the tumbling and friction cleaning of onions inside the rollers.

[0042] Specifically, motor 12, as the power source, can adjust its speed as needed to adapt to different cleaning intensities and throughput requirements. Through the transmission method of the coupling and drive ring, the power transmission process is stable and reliable, avoiding shaft misalignment problems that may occur with direct transmission. The drive ring is fixed to the outer wall of the outer roller 1, has a large contact area, and can effectively distribute torque loads, ensuring smooth roller rotation and reducing deformation or damage caused by excessive local stress.

[0043] In the above embodiments, the motor 12 can be a variable frequency motor 12 or a speed-regulating motor 12. The user can adjust the speed of the drum according to the difficulty of cleaning the onions to achieve a balance between energy saving and cleaning effect. The coupling can be a flexible coupling, a gear coupling, or a diaphragm coupling to meet different transmission accuracy and damping requirements. The cross-sectional shape of the drive ring can be a circular ring, a trapezoidal ring, or a multi-groove ring, and its fixing method can be bolt fastening, welding, or slot embedding.

[0044] Please see Figure 1 In one possible implementation, the frame 11 further includes a base 13, on which the column is fixedly mounted. The base 13 serves to support and stabilize the entire machine. To reduce vibrations during operation, vibration damping supports are provided on the base 13. These supports effectively absorb vibration energy during high-speed rotation of the rollers and the impact of the onion rolling, thereby reducing noise and structural stress and improving the stability of the equipment operation.

[0045] Specifically, the synchronous rotation of the outer roller 1 and the inner roller 2 generates periodic loads and impact forces. If directly rigidly supported by the base 13, this can easily lead to resonance or excessive vibration. By adding vibration damping supports between the base 13 and the mounting surface, the transmission of vibration can be effectively isolated, avoiding excessive operating noise and reducing the impact on the ground or other production equipment. Vibration damping supports can also extend the service life of the roller bearings and the frame 11 structure, reducing maintenance costs.

[0046] In the above embodiments, the base 13 can be a welded steel plate structure or a cast iron integral structure, possessing high strength and stability. Anti-slip support points can be provided on the surface of the base 13 to ensure that the equipment will not slip in a wet or cleaning environment. The vibration damping support can be a rubber vibration damping pad, a spring vibration damper, or a composite damper; users can choose different forms according to the site conditions. For example, when the equipment is installed on a hard surface, a rubber vibration damping pad can be used, which is simple in structure and easy to install; when the equipment is installed on a high floor or a lightweight surface, a spring vibration damper can be used to achieve better vibration isolation.

[0047] Please see Figure 1 In one possible implementation, the spray structure 6 includes multiple nozzles arranged along the crossbeam. The nozzles are evenly distributed in an arc-shaped array above the inner roller 2, with their spray direction pointing towards the center area of ​​the roller, thereby achieving full coverage rinsing of the onions inside the roller. This arrangement ensures that the spray water acts evenly on the onions at different locations during the roller's rotation, avoiding any blind spots in the cleaning process.

[0048] Specifically, the onions tumble continuously inside the drum, while water jets from the nozzles impact the onion surface in an arc-shaped pattern, effectively washing away surface dirt and impurities. Because the nozzles are arranged in an array, the water flow acts simultaneously inside the drum at multiple angles, not only improving the impurity removal rate but also accelerating the removal of impurities from the onion surface. Through frictional interaction with the elastic cleaning balls 5, the sprayed water further removes the detached dirt and outer skin, making the cleaning process even more efficient.

[0049] In the above embodiments, the number and spacing of the spray nozzles can be designed according to the diameter and length of the drum. For example, when the drum length is long, the number of spray nozzles can be increased to ensure uniform water coverage. The spray angle of the spray nozzles is adjustable to adapt to different cleaning needs; the nozzle orifice diameter can be designed according to the circulating water pressure, with a common range of 0.5 to 2 mm, to balance the water flow velocity and the spray coverage area. The spray nozzles are preferably made of stainless steel or corrosion-resistant engineering plastics to adapt to humid cleaning environments and extend their service life.

[0050] In addition, the nozzles can be configured for direct spray, atomization, or fan-shaped spray. Direct spray is suitable for removing stubborn dirt, atomization is suitable for surface rinsing and cooling, and fan-shaped spray is suitable for large-area coverage. Users can choose different types of nozzle combinations according to their actual cleaning needs. Adjustable mounting slots can be provided on the crossbeam to allow for flexible adjustment of the nozzle angle and position.

[0051] Please see Figure 1 In one possible implementation, the spray structure 6 is connected to the circulating water tank 14 via a pipeline. The cleaning water in the circulating water tank 14 is pressurized by a water pump and then flows back to the spray nozzle, thereby realizing the recovery and recycling of water flow. The circulating water tank 14 is equipped with a removable filter assembly to separate and remove mud, sand, onion peel fragments and other impurities from the returned water, ensuring that the cleaning water reused maintains a high level of cleanliness.

[0052] Specifically, during operation, the nozzles continuously spray circulating water onto the inner roller 2 to clean the surface of the onions. The cleaning wastewater flows into the collection tank via the drainage structure 7 and ultimately into the circulating water tank 14. The circulating water tank 14 purifies the water using a filter assembly, and the filtered water, pressurized by a water pump, re-enters the spray structure 6, forming a closed-loop water system. This circulation process significantly reduces water consumption for cleaning, improves water resource utilization, and lowers operating costs.

[0053] In the above embodiments, the volume of the circulating water tank 14 can be designed according to the equipment's processing capacity. For example, a large-capacity water tank can be used for production lines with a large daily processing capacity to ensure continuous spraying. The specifications of the water pump can be selected according to the number of nozzles and the required spraying pressure, with common operating pressures ranging from 0.2 to 0.6 MPa. The filter assembly can adopt a multi-layer structure, including a coarse filter, a fine filter, and a replaceable filter element, which can effectively trap impurities of different particle sizes. For easy cleaning, the filter assembly can be designed as a pull-out or screw-on structure, allowing users to quickly disassemble and replace it, ensuring that the water tank remains in a highly efficient working state for a long time.

[0054] It is worth noting that the circulating water tank 14 can be made of stainless steel or corrosion-resistant engineering plastics to ensure that it is not easily corroded when in contact with water and impurities for a long time. If necessary, a water quality adjustment device can also be added inside the tank, such as installing an ultraviolet germicidal lamp or adding a safe dose of disinfectant, to ensure that bacteria do not grow in the circulating water and to ensure that the cleaning process meets food processing hygiene standards.

[0055] Please see Figure 1 In one possible implementation, the drainage structure 7 includes a water collection trough located below the inner roller 2, with a removable filter screen above the trough to intercept onion peels, dirt, and other solid impurities generated during the washing process. The bottom of the water collection trough has a guide angle towards the drain outlet, allowing the washing wastewater to quickly collect at the drain outlet under gravity for rapid discharge.

[0056] Specifically, the circulating water sprayed by the spray structure 6 flows naturally into the collection tank after washing the onions. Impurities are trapped by the filter screen, preventing them from entering the downstream circulating water tank 14 or the pipeline system with the water flow, thus avoiding blockages. The filtered wastewater is quickly collected under the guidance of the sloping bottom surface and discharged through the drain or introduced into the circulating water tank 14. This design ensures that the washing area always maintains good drainage capacity, preventing water accumulation from affecting the rolling and washing effect of the onions.

[0057] In the above embodiments, the water collection tank can be made of stainless steel or corrosion-resistant engineering plastics, possessing high rust and corrosion resistance, and capable of long-term adaptation to humid and impurity-containing environments. The flow guide angle can be designed according to the equipment size and drainage requirements, with a common range of 5° to 20°, ensuring rapid drainage while preventing excessive water flow impact that could lead to impurity accumulation. The drain outlet can be fitted with quick-release pipes or drain valves, allowing users to flexibly choose between direct discharge or recirculation based on operating conditions.

[0058] Specifically, the mesh size of the detachable filter screen can be designed according to the particle size of impurities, ranging from 5 mm to 20 mm, to ensure effective interception of onion skins and larger debris without obstructing water flow. The filter screen features a pull-out design, allowing users to quickly remove and clean it during routine maintenance, improving maintainability and ease of use. If necessary, a secondary filtration device, such as a fine-mesh filter or a hydrocyclone separator, can be added above the filter screen to further improve the quality of the clean water.

[0059] With the above structure, this embodiment can achieve rapid and stable drainage during the cleaning process, while effectively separating onion impurities, ensuring the smooth operation of the circulating water system, and improving the overall cleaning efficiency and service life of the equipment.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drum-type cleaning device for dehydrated onion processing, characterized in that, include: Outer roller; The inner roller is a flexible structural component, which is sleeved inside the outer roller and is fixedly connected to the outer roller by multiple annular flexible connectors, which are spaced apart along the axial direction of the roller. A sandwich layer is disposed between the inner roller and the outer roller, and two adjacent annular flexible connectors together with the inner roller and the outer roller define a plurality of annular sandwich layers; An elastic cleaning ball is disposed within the annular interlayer. The elastic cleaning ball is adapted to the annular interlayer so that it can rotate and roll with the roller within the corresponding annular interlayer, thereby reducing the contact impact between the onion and the inner roller and performing friction cleaning. A spray structure is located above the inner roller and is used to spray circulating water onto the onions during the washing process. The outer roller and the inner roller are provided with several through holes; A drainage structure, located below the inner roller, is used to collect and discharge cleaning wastewater.

2. The dehydrated onion processing drum washer according to claim 1, characterized by The inner roller has several openings on its wall, the size of which is smaller than the diameter of the elastic cleaning ball, so that the elastic cleaning ball can partially extend out of the inner roller and directly contact the onion to improve the cleaning effect.

3. The dehydrated onion processing drum washer according to claim 2, characterized in that, The outer surface of the elastic cleaning ball is provided with several protrusions.

4. The dehydrated onion processing drum washer according to claim 2 or 3, characterized in that, The opening edge of the inner roller is folded outward to form a limiting structure to prevent the elastic cleaning ball from coming out of the inner roller.

5. The dehydrated onion processing drum washer apparatus according to claim 1, wherein, It also includes a rack, which is a portal frame structure, and the rack includes: The columns are arranged in pairs and opposite to each other on both sides of the outer roller. Each column is provided with a bearing seat for mounting the end shaft of the outer roller, so that the two ends of the outer roller are rotatably supported by the column. A crossbeam is connected to the upper end of the column and spans over the outer roller, and the spray structure is fixed to the crossbeam.

6. The dehydrated onion processing drum washer according to claim 5, characterized by It also includes a motor, which is fixed to the frame. The output end of the motor is connected to a drive ring disposed on the outer periphery of the outer roller via a coupling, so as to drive the outer roller to rotate and make the inner roller rotate accordingly.

7. The dehydrated onion processing drum washer apparatus according to claim 5, wherein, The frame also includes a base, the column is fixed to the base, and the base is provided with vibration damping supports to reduce operating vibration.

8. The dehydrated onion processing drum washer apparatus according to claim 5, wherein, The spray structure includes multiple nozzles arranged along the crossbeam. The nozzles are evenly distributed in an arc-shaped array relative to the inner roller, and their spray direction is directed towards the center area of ​​the inner roller, so as to achieve full coverage rinsing of the onions inside the roller.

9. The dehydrated onion processing drum washer apparatus according to claim 8, wherein, The spray structure is connected to a circulating water tank via a pipeline. The circulating water tank is pressurized by a water pump and the cleaning water is returned to the spray head to realize the recycling of the cleaning water. The circulating water tank is equipped with a detachable filter assembly to remove impurities from the returned water.

10. The dehydrated onion processing drum washer apparatus as claimed in claim 1, wherein, The drainage structure includes a water collection trough located below the inner roller and a removable filter screen arranged on the water collection trough. The bottom of the water collection trough has a guide angle toward the drain outlet to accelerate the discharge of cleaning wastewater and intercept onion skins and debris.

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