A kind of dabs the egg yolk of brush coating durian loading mechanism

Abstract

The utility model provides a kind of roasting durian feeding mechanism of egg liquid painting, including workbench, the upper surface of the workbench is fixedly installed with two mirror image symmetrical side plates, two side plates upper middle fixedly installed with egg liquid painting mechanism, two side plates both ends are rotatably installed with sprocket shaft, and fixedly installed with collection box, and any end of one sprocket shaft is fixed with the fixedly installed conveying motor output end on one side plate;Every sprocket shaft both ends are fixedly installed with chain gear, chain gear is equipped with chain, and several conveying shafts are fixedly installed on two chains, and placing tray is placed on conveying shaft;The utility model is with "sprocket shaft+chain+conveying shaft" matching tray groove to prevent deviation, motor constant-speed feeding;Pump body will be accurately sent to spray head spray brush hair, prevent pollution stratification, spray cover and half exposure coating roller prevent splashing, coating uniform;Match small batch and different specifications durian, improve product quality and equipment adaptability.

Description

Technical Field

[0001] This utility model belongs to the field of coating and feeding technology, and in particular relates to a coating and feeding mechanism for baked durian with egg wash. Background Technology

[0002] With the development of the snack food industry, roasted durian has become a popular product in the market due to its unique flavor. The "egg wash" process is a key step in improving the texture and color of the roasted durian skin. After baking, the egg wash forms a golden and crispy outer shell, while locking in the moisture of the durian flesh and preventing the flesh from drying out during the baking process.

[0003] Currently, the egg wash coating process in durian processing presents the following technical challenges: In small- to medium-batch production scenarios, the process often relies on manual application of egg wash using hand-held brushes. This not only limits the output per shift but also makes it difficult to maintain consistent brushing pressure and egg wash usage. Consequently, some durian flesh has an excessively thick layer of egg wash on its surface (which clumps after baking), while some crevices remain uncovered (resulting in a dry, tough surface after baking), leading to poor product quality consistency. Furthermore, direct contact between humans and food poses hygiene risks due to hand oil and hair, failing to meet food safety production standards.

[0004] The coating equipment used in a few large-scale production lines mostly follows the "flat conveyor belt + spray nozzle" or "immersion" structure commonly used in the baking industry. The former is due to the irregular shape of durian flesh (mostly segmented, with an uneven surface), where the egg liquid sprayed from the nozzle tends to accumulate in the raised parts of the flesh and leave blank areas in the depressions, resulting in insufficient coating uniformity. The latter requires the durian to be completely immersed in the egg liquid, which consumes more than 30% more egg liquid than manual brushing, and the excess egg liquid is prone to carrying fruit pulp residue, leading to secondary contamination of the egg liquid. In addition, the existing equipment's conveyor mechanism is mostly a flat conveyor belt, and the tray is prone to shifting due to the uneven weight of the durian flesh, further aggravating the coating position deviation.

[0005] Therefore, it is essential to invent a feeding mechanism for roasted durian that involves brushing egg wash onto it. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a feeding mechanism for baking durian with egg wash, including a worktable, side plates, an egg wash brushing mechanism, a sprocket shaft, a conveyor motor, chain gears, a chain, a conveyor shaft, a placement tray, and a collection box. Two mirror-symmetrical side plates are fixedly installed on the upper surface of the worktable. The egg wash brushing mechanism is fixedly installed in the middle above the two side plates. The sprocket shaft is rotatably installed between the two ends of the two side plates and a collection box is fixedly installed thereon. One end of one of the sprocket shafts is fixedly connected to the output end of the conveyor motor fixedly installed on one of the side plates. Each sprocket shaft has a chain gear fixedly installed at both ends. The chain gear is equipped with the chain. Several conveyor shafts are fixedly installed on the two chains. The placement tray is placed on the conveyor shaft.

[0007] Preferably, the egg liquid coating mechanism includes a spray hood, a bracket, a pump body, an egg liquid tank, a delivery pipe, spray nozzles, a coating roller, brush bristles, and a coating motor. The spray hood is fixedly installed above the middle of the two side plates by the brackets on both sides. The pump body and the egg liquid tank are fixedly installed on the spray hood and connected to each other by the delivery pipe. Several spray nozzles are fixedly installed inside the upper part of the spray hood. The coating roller, which is rotatably installed below the spray hood, is fixed to the output end of the coating motor fixedly installed on itself. The coating roller is provided with brush bristles.

[0008] Preferably, the lower opening of the spray hood is arc-shaped and adapted to the spreading roller. Several spray nozzles are fixedly installed at equal intervals on the upper surface inside the spray hood and are located directly above the spreading roller. The pump body can draw out the egg liquid inside the egg liquid tank through the delivery pipe and spray it onto the bristles of the spreading roller through the spray nozzles.

[0009] Preferably, half of the application roller is exposed, and the bristles of the exposed portion are able to come into contact with the durian placed on the tray.

[0010] Preferably, the applicator roller is located directly above the collection box, the placement tray can pass between the applicator roller and the collection box, the opening of the collection box faces upward and corresponds to the applicator roller above it.

[0011] Preferably, the lower ends of the placement tray are provided with grooves that fit with the conveyor shafts, and the two conveyor shafts can drive a single placement tray to be conveyed towards the egg liquid coating mechanism.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention employs a conveying structure consisting of a sprocket shaft, a chain, and a conveyor shaft. Combined with a groove design at the bottom of the tray that mates with the conveyor shaft, the tray remains in a fixed position during transport, preventing tray shifting due to uneven weight distribution of durian flesh. Simultaneously, the conveyor motor drives the sprocket shaft to rotate at a constant speed, ensuring the tray is smoothly conveyed to the egg wash coating mechanism, providing a stable foundation for subsequent uniform coating. Compared to existing flat conveyor belt structures, this reduces coating position deviation and significantly improves product quality consistency.

[0013] This invention uses a pump to precisely deliver egg liquid from the egg liquid tank to the spray nozzle via a delivery pipe. The nozzle then sprays the egg liquid onto the bristles of the application roller, avoiding the contamination and layering problems caused by the traditional method of "dipping a brush into the egg liquid tank." The pump also allows for adjustable liquid supply, ensuring a precise amount of egg liquid is provided. The arc-shaped lower opening of the spray nozzle is designed to fit the application roller, preventing splashing. Only half of the application roller is exposed, ensuring the bristles fully contact the durian flesh (including crevices) while preventing excess bristles from contacting non-target areas. The rotating application roller, in conjunction with the brush, effectively solves the problems of liquid accumulation in raised areas and blank areas in recessed areas.

[0014] The operation process of this utility model only requires manual placement of the tray and starting of the equipment to complete the automated coating. Afterwards, the tray can be manually removed to proceed to the next process. No professional technicians are required to operate it, which is suitable for small and medium batch and flexible production line needs. At the same time, by adjusting the speed of the conveyor motor and the liquid supply of the pump, it can be adapted to different specifications (such as segmented or block-shaped durian pulp), which has a wide range of applications and improves the adaptability of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is another overall structural schematic diagram of this utility model.

[0017] Figure 3 This is a schematic diagram of the egg liquid coating mechanism of this utility model.

[0018] Figure 4 This is a partial cross-sectional structural diagram of the egg liquid coating mechanism of this utility model.

[0019] In the picture: 1. Workbench; 2. Side plate; 3. Egg liquid coating mechanism; 31. Spray hood; 32. Support; 33. Pump body; 34. Egg liquid tank; 35. Conveying pipe; 36. Spray nozzle; 37. Coating roller; 38. Brush bristles; 39. Coating motor; 4. Sprocket shaft; 5. Conveying motor; 6. Chain gear; 7. Chain; 8. Conveying shaft; 9. Placement tray; 10. Collection box. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for 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. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0022] As attached Figure 1 To be continued Figure 4 As shown: This utility model provides a feeding mechanism for baking durian with egg wash, including a workbench 1, side plates 2, an egg wash brushing mechanism 3, a sprocket shaft 4, a conveyor motor 5, chain gears 6, chains 7, conveyor shafts 8, a placement tray 9, and a collection box 10. Two mirror-symmetrical side plates 2 are fixedly installed on the upper surface of the workbench 1. The egg wash brushing mechanism 3 is fixedly installed in the middle above the two side plates 2. The sprocket shaft 4 is rotatably installed between the two ends of the two side plates 2, and the collection box 10 is fixedly installed thereon. One end of one of the sprocket shafts 4 is fixedly connected to the output end of the conveyor motor 5 fixedly installed on one of the side plates 2. Each sprocket shaft 4 has a chain gear 6 fixedly installed at both ends. The chain gear 6 is equipped with a chain 7. Several conveyor shafts 8 are fixedly installed on the two chains 7. The placement tray 9 is placed on the conveyor shafts 8.

[0023] Furthermore, the egg liquid coating mechanism 3 mainly includes a spray hood 31, a support 32, a pump body 33, an egg liquid tank 34, a delivery pipe 35, spray nozzles 36, a coating roller 37, brush bristles 38, and a coating motor 39. The spray hood 31 is securely mounted above the two side plates 2 in the middle position via bolted or welded connections to the support 32 fixedly connected to its two sides, forming the main support frame of the entire coating mechanism. The pump body 33 (preferably a peristaltic pump or gear pump suitable for food fluids) and the egg liquid tank 34 (usually made of stainless steel that meets food hygiene standards) are both directly fixed to the top plate or side wall of the spray hood 31, and are connected by a delivery pipe 35 made of food-grade flexible or rigid tubing. Several spray nozzles 36 are installed inside the upper part of the spray hood 31. A spreading roller 37 is rotatably mounted below the spray hood 31 via a pair of bearing seats. The shaft end of the spreading roller 37 is connected via a coupling to the output shaft of a spreading motor 39 (such as a servo motor or stepper motor) fixedly mounted on the outer wall of the spray hood 31, thereby obtaining rotational power. The cylindrical roller body surface of the spreading roller 37 is uniformly covered with dense bristles 38 made of nylon or food-grade silicone for carrying and transferring egg liquid.

[0024] Furthermore, the lower opening of the spray hood 31 is specially designed as an arc-shaped structure. The radius of curvature of this arc matches the outer diameter of the coating roller 37, resulting in a minimal gap between them. This allows the coating roller 37 to rotate freely while effectively preventing excessive leakage of egg liquid from both sides. On the upper surface inside the spray hood 31, multiple spray nozzles 36 are fixedly installed at equal intervals along the axial direction of the coating roller 37. The spray direction of these nozzles 36 is precisely aligned with the coating roller 37 directly below. During operation, the pump 33 is activated in a controlled manner, drawing a measured amount of egg liquid from the egg liquid tank 34 through the delivery pipe 35 and pumping it to all the spray nozzles 36. Subsequently, the egg liquid is sprayed evenly in an atomized or fine stream onto the bristles 38 of the slowly rotating coating roller 37, thus completing the wetting and pre-coating of the bristles 38.

[0025] Furthermore, in terms of spatial arrangement, approximately half of the cylindrical portion of the spreading roller 37 is housed inside the spray hood 31 to collect the egg mixture, while the other half of the cylinder is exposed outside the arc-shaped opening of the spray hood 31. This design allows the exposed bristles 38, already evenly coated with egg mixture, to directly contact the durian flesh on the placement tray 9 directly below it. As the placement tray 9 carrying the durian passes under the rotating spreading roller 37, the bristles 38 generate gentle rolling friction with the durian surface, thereby evenly spreading the egg mixture onto the durian surface.

[0026] Furthermore, the application roller 37 is precisely positioned vertically above the collection box 10. During transport, the tray 9 and the durian on it pass smoothly through the gap between the application roller 37 and the upper edge of the collection box 10. The collection box 10 (typically made of stainless steel or plastic) has an upward-facing opening, large enough to cover the entire projected area of ​​the application roller 37. Its primary function is to collect and catch any excess egg wash that may drip from the bristles 38 of the application roller 37, as well as any small amount of residual liquid splashed from the application area, thus keeping the workbench 1 clean and preventing egg wash contamination of the equipment and floor.

[0027] Furthermore, the placement tray 9 is a carrier specifically designed to hold durian pulp. At each end of its base plate, an arc-shaped groove is machined to fit the outer diameter of the conveyor shaft 8. During assembly and operation, each pair of conveyor shafts 8 on the two chains 7 precisely embeds into the corresponding groove at the bottom of the placement tray 9. Through the cyclical movement of the chains 7, the paired conveyor shafts 8 stably support and drive individual placement trays 9, precisely conveying them intermittently or continuously along the track defined by the side plate 2 towards the egg coating mechanism 3, ensuring that each tray passes through the coating station sequentially.

[0028] Furthermore, to achieve automated start-stop control of the egg liquid coating mechanism 3, two diffuse reflection photoelectric sensors (model E3Z-D61 with IP65 protection rating, suitable for the humid and dusty environment of food processing workshops) are added to this mechanism. These are an inlet detection sensor and an outlet detection sensor. Both are fixedly installed on the inner surface of one of the side plates 2 by L-shaped stainless steel brackets, and are located on both sides of the egg liquid coating mechanism 3 along the conveying direction. The inlet detection sensor is set on the feeding side of the egg liquid coating mechanism 3 (i.e., on the path before the placement tray 9 is conveyed to the coating roller 37), and its sensing surface is flush with the upper surface of the placement tray 9, 10-15cm away from the front end of the coating roller 37 in the horizontal direction. The outlet detection sensor is set on the discharging side of the egg liquid coating mechanism 3 (i.e., on the path after the placement tray 9 leaves the coating roller 37), and its sensing surface is at the same height as the inlet detection sensor, 10-15cm away from the rear end of the coating roller 37 in the horizontal direction.

[0029] Furthermore, the signal lines of both photoelectric sensors are connected to the PLC controller (model S7-200SMART) in the equipment control box through conduits, forming an electrical linkage with the pump body 33 and the coating motor 39 of the egg liquid coating mechanism 3: When the placement tray 9 is conveyed to the egg liquid coating mechanism 3 along the conveyor shaft 8, it first enters the sensing range of the inlet detection sensor. The sensor sends an electrical signal to the PLC, which then controls the pump body 33 to start (starting liquid supply) and the coating motor 39 to run (driving the coating roller 37 to rotate), putting the egg liquid coating mechanism 3 into working condition; when the placement tray 9 has completely passed under the coating roller 37 and entered the sensing range of the outlet detection sensor, the sensor sends an electrical signal to the PLC. After a delay of 0.5-1 seconds (ensuring that the tail of the tray has completely passed the coating roller 37), the PLC controls the pump body 33 to stop supplying liquid and the coating motor 39 to stop, shutting down the egg liquid coating mechanism 3. This design avoids the egg liquid coating mechanism 3 from running idle when no tray passes by, further reducing egg liquid waste and equipment wastage, and improving the degree of automation.

[0030] The working principle is as follows: First, the operator places the tray 9 containing durians on the conveyor shaft 8 on the workbench 1. Because the groove at the bottom of the tray 9 fits with the conveyor shaft 8, it can stably support the durians.

[0031] Next, the conveyor motor 5 starts, driving the sprocket shaft 4 connected to it to rotate. The chain gear 6 on the sprocket shaft 4 drives the chain 7 to move. The chain 7 then drives the conveyor shaft 8 fixed on it to rotate synchronously, causing the placement tray 9 to move along the path between the two side plates 2 towards the egg liquid coating mechanism 3.

[0032] Then, when the placement tray 9 moves to the feeding side of the egg liquid coating mechanism 3, the inlet detection sensor (photoelectric sensor) is triggered. The inlet detection sensor transmits the signal to the PLC controller, and the PLC controller then controls the egg liquid coating mechanism 3 to start: the coating motor 39 starts to run, driving the coating roller 37 to rotate; at the same time, the pump body 33 starts, and the egg liquid in the egg liquid tank 34 is transported to the spray nozzle 36 through the conveying pipe 35. The spray nozzle 36 sprays the egg liquid onto the bristles 38 on the surface of the coating roller 37.

[0033] Subsequently, the placement tray 9 continues to move under the spreading roller 37. At this time, the spreading roller 37 is exposed outside the spray hood 31 and the brush bristles 38 are covered with egg liquid. As the spreading roller 37 rotates, it comes into contact with the surface of the durian on the placement tray 9. As the placement tray 9 continues to move, the brush bristles 38 evenly spread the egg liquid on the surface of the durian.

[0034] Meanwhile, excess egg liquid dripping from the brush bristles 38 during the application process will be collected by the collection box 10 located directly below the application roller 37, preventing the egg liquid from contaminating the workbench 1.

[0035] When the placement tray 9 completely passes the coating roller 37 and moves to the discharge side of the egg liquid coating mechanism 3, the outlet detection sensor (photoelectric sensor) will be triggered. The outlet detection sensor will transmit the signal to the PLC controller. After a certain delay, the PLC controller will control the egg liquid coating mechanism 3 to shut down: the pump body 33 will stop supplying liquid, the coating motor 39 will stop running, and the coating roller 37 will stop rotating.

[0036] Finally, the egg wash coating tray 9 is transported to the end of the transport path and removed by the operator, thus completing the entire egg wash coating process.

[0037] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A feeding mechanism for baking durian with egg wash, characterized in that, The device includes a workbench (1), side plates (2), an egg coating mechanism (3), a sprocket shaft (4), a conveyor motor (5), a chain gear (6), a chain (7), a conveyor shaft (8), a placement tray (9), and a collection box (10). Two mirror-symmetrical side plates (2) are fixedly installed on the upper surface of the workbench (1). The egg coating mechanism (3) is fixedly installed in the middle above the two side plates (2). The sprocket shaft (4) is rotatably installed between the two ends of the two side plates (2) and a collection box (10) is fixedly installed thereon. One end of one of the sprocket shafts (4) is fixed to the output end of the conveyor motor (5) fixedly installed on one of the side plates (2). The chain gear (6) is fixedly installed on both ends of each sprocket shaft (4). The chain (7) is mounted on the chain gear (6). Several conveyor shafts (8) are fixedly installed on the two chains (7). The placement tray (9) is placed on the conveyor shaft (8).

2. The egg wash coating feeding mechanism for roasted durian as described in claim 1, characterized in that: The egg liquid coating mechanism (3) includes a spray hood (31), a bracket (32), a pump body (33), an egg liquid tank (34), a conveying pipe (35), a spray nozzle (36), a coating roller (37), bristles (38), and a coating motor (39). The spray hood (31) is fixedly installed above the middle of the two side plates (2) by the brackets (32) on both sides. The pump body (33) and the egg liquid tank (34) are fixedly installed on the spray hood (31) and are connected by the conveying pipe (35). Several spray nozzles (36) are fixedly installed inside the upper part of the spray hood (31). The coating roller (37) rotatably installed below the spray hood (31) is fixed to the output end of the coating motor (39) fixedly installed on itself. The coating roller (37) is provided with bristles (38).

3. The egg wash coating feeding mechanism for roasted durian as described in claim 2, characterized in that: The lower opening of the spray hood (31) is arc-shaped and is adapted to the smearing roller (37). Several spray nozzles (36) are fixedly installed at equal intervals on the upper surface of the inside of the spray hood (31) and are located directly above the smearing roller (37). The pump body (33) can draw out the egg liquid inside the egg liquid tank (34) through the delivery pipe (35) and spray it onto the bristles (38) of the smearing roller (37) through the spray nozzles (36).

4. The egg wash coating feeding mechanism for roasted durian as described in claim 3, characterized in that: Half of the coating roller (37) is exposed, and the bristles (38) of the exposed part are able to come into contact with the durian coating placed on the placement tray (9).

5. The egg wash coating feeding mechanism for roasted durian as described in claim 4, characterized in that: The application roller (37) is located directly above the collection box (10), and the placement tray (9) can pass between the application roller (37) and the collection box (10). The opening of the collection box (10) faces upward and corresponds to the application roller (37) above it.

6. The egg wash coating feeding mechanism for roasted durian as described in claim 5, characterized in that: The lower ends of the placement tray (9) are provided with grooves that fit with the conveying shaft (8), and the two conveying shafts (8) can drive a single placement tray (9) to be conveyed towards the egg liquid coating mechanism (3).

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