A vacuum oil spraying device for fish feed

Abstract

This utility model relates to an oil spraying device, specifically a vacuum oil spraying device for aquatic feed. The device includes a vacuum tank, to which a vacuum pump is connected via a vacuum tube. The vacuum tube has a venting opening. A feeding mechanism is located at the top of the vacuum tank, and an oil spraying mechanism is located below it. This device sprays oil onto the feed surface. After spraying, the atmospheric pressure from the vacuum venting forces the oil adsorbed on the feed surface into the feed pores, forcing the oil into the feed interior. This prevents the oil from diffusing to the water surface, eliminating the barrier of air created by the oil and allowing effective contact between air and the water surface, thus effectively increasing dissolved oxygen levels. Simultaneously, it prevents nutrient loss due to oil diffusion, effectively ensuring the feed's nutritional value. This solves the problem of existing oil spraying devices only spraying oil onto the feed surface, causing the oil to easily diffuse to the water surface, resulting in the oil isolating the water from air and leading to nutrient loss.

Description

Technical Field

[0001] This utility model relates to an oil spraying device, specifically a vacuum oil spraying device for aquatic feed. Background Technology

[0002] The production process of fish feed includes raw material pretreatment (washing, drying, and grinding), ingredient formulation, mixing, extrusion, spraying, and packaging. Extrusion involves instantly reducing pressure to expand the feed, creating numerous pores within the feed and increasing its volume, allowing it to float on the water surface for easier feeding by fish. Spraying involves applying oils or other additives to the surface of the feed to adjust its nutritional composition.

[0003] Patent application CN119924417A discloses a method, apparatus, electronic device, and storage medium for spraying oil onto fish feed. The method, applied to an oil sprayer, first acquires the average feed volume and average feed weight, as well as the target oil percentage. Then, based on the target oil percentage, average feed weight, and average feed volume, a target parameter set is determined from multiple preset parameter sets. The operation of the oil sprayer is then controlled based on the parameters in the target parameter set. This achieves automatic control of the oil sprayer's operation according to the specifications of the fish feed, eliminating the need for manual parameter setting and resulting in high efficiency. Furthermore, since each parameter set is derived from production data of fish feed with acceptable oil uniformity, controlling the oil sprayer's operation based on the target parameter set ensures that the oil uniformity of the produced fish feed is also within acceptable limits, thereby improving feed quality.

[0004] The methods and devices described above simply spray oil onto the surface of the feed using an oil sprayer. When this oil enters the water, it easily spreads on the surface, forming an oil film. This oil film isolates the water from the air, leading to oxygen deficiency. Furthermore, the oil film disperses the oil, causing nutrient loss from the feed. Therefore, it is necessary to design a vacuum oil spraying device for fish feed to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to provide a vacuum oil spraying device for producing fish feed that does not easily form an oil film, ensures feed nutrition, and increases the oxygen content of the water.

[0006] The technical solution of this utility model is:

[0007] A vacuum oil spraying device for fish feed comprises a vacuum tank, a vacuum pump, a feeding mechanism, and an oil spraying mechanism. Its features include: a vacuum pump connected to one side of the top of the vacuum tank via a vacuum tube; a venting port is provided at the end of the vacuum tube on one side of the vacuum tank; a venting valve is provided on the venting port; a vacuum shut-off valve is provided on the vacuum tube between the venting port and the vacuum pump; a feeding mechanism is provided on the other side of the top of the vacuum tank; an oil spraying mechanism is provided on the vacuum tank below the feeding mechanism; and a discharge valve is provided at the bottom port of the vacuum tank.

[0008] The feeding mechanism includes a hopper and a transition hopper. The bottom port of the hopper is connected to the top-sealed transition hopper, and the bottom port of the transition hopper is connected to a vacuum tank.

[0009] The bottom ports of the silo and the transition silo are respectively equipped with discharge control valves.

[0010] The oil injection mechanism comprises an oil tank, an oil pump, a main oil pipe, and a nozzle assembly containing multiple nozzles. An oil pump is located next to the oil tank. The inlet of the oil pump is connected to the bottom of the oil tank through a connecting pipe. The outlet of the oil tank is connected to a ring-shaped main oil pipe through a connecting pipe. Multiple nozzle assemblies are located above the main oil pipe. Each nozzle of the nozzle assembly is connected to the main oil pipe through a flexible hose.

[0011] The nozzle assembly is evenly distributed on the top of the vacuum tank, and the nozzles in the nozzle assembly are tilted relative to each other to ensure that each nozzle faces a different direction.

[0012] An oil delivery control valve is installed on the connecting pipe between the main oil pipe and the oil pump.

[0013] The beneficial effects of this utility model are as follows:

[0014] This fish feed's vacuum oil spraying device sprays oil onto the feed surface. After spraying, the atmospheric pressure from the vacuum forces the oil adsorbed on the feed surface into the abundant pores inside the feed due to its expansion. This forces the oil into the feed, preventing it from spreading to the water surface and eliminating the barrier of air created by the oil. This allows air to effectively contact the water surface, effectively increasing dissolved oxygen levels. Simultaneously, it prevents nutrient loss due to oil diffusion, effectively ensuring the feed's nutritional value. This solves the problem of existing oil spraying devices only spraying oil onto the feed surface, causing the oil to easily spread to the water surface, resulting in the oil isolating the water from air and causing nutrient loss. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram showing the distribution of the nozzles of this utility model;

[0017] Figure 3This is a schematic diagram illustrating the working principle of this utility model.

[0018] In the diagram: 1. Vacuum tank, 2. Vacuum pump, 3. Vacuum pipe, 4. Air vent, 5. Air vent valve, 6. Vacuum shut-off valve, 7. Discharge valve, 8. Feed hopper, 9. Transition hopper, 10. Feeding control valve, 11. Oil tank, 12. Oil pump, 13. Main oil pipe, 14. Nozzle, 15. Nozzle assembly, 16. Oil delivery control valve, 17. Feed, 18. Feed pores, 19. Oil droplets, 20. Oil film, 21. Oil entering the feed. Detailed Implementation

[0019] The vacuum oil spraying device for this fish feed consists of a vacuum tank 1, a vacuum pump 2, a feeding mechanism, and an oil spraying mechanism. The vacuum pump 2 is connected to one side of the top of the vacuum tank 1 via a vacuum pipe 3, which evacuates the tank 1 to reduce the gas pressure. A vent 4 is located at the end of the vacuum pipe 3 on one side of the vacuum tank 1, and a vent valve 5 is installed on the vent 4. The vent 4 is opened or closed by the valve 5, connecting the vacuum tank 1 to the outside environment when it is open. A vacuum shut-off valve 6 is installed on the vacuum pipe 3 between the vent 4 and the vacuum pump 2, which closes the vacuum pipe 3 and thus the vacuum tank 1, preventing the vacuum pump 2 from drawing in oil mist. This prevents oil from being sucked out and wasted, and also prevents a fire caused by the vacuum pump 2 drawing in oil mist. A feeding mechanism is located on the other side of the top of the vacuum tank 1 to feed the expanded feed into the vacuum tank 1. An oil spraying mechanism is installed on the vacuum tank 1 below the feeding mechanism to spray oil into the vacuum tank 1, forming an oil mist. This allows the oil to coat the surface of the feed during feeding. A discharge valve 7 is installed at the bottom port of the vacuum tank 1 to discharge the feed from the vacuum tank 1.

[0020] The feeding mechanism includes a hopper 8 and a transition hopper 9. The bottom port of the hopper 8 is connected to the top-sealed transition hopper 9, and the bottom port of the transition hopper 9 is connected to the vacuum tank 1. Feeding control valves 10 are respectively installed at the bottom ports of the hopper 8 and the transition hopper 9. The function of the transition hopper 9 is to quantitatively feed material into the vacuum tank 1 through the coordination of the transition hopper 9 with the feeding control valves 10 at the bottom ports of the hopper 8 and the transition hopper 9. Simultaneously, the transition hopper 9 isolates the vacuum tank 1 from the hopper 8 during feeding, thereby preventing the vacuum tank 1 from communicating with the outside world and making it less likely to break the vacuum in the vacuum tank 1 during the feeding process.

[0021] The oil spraying mechanism comprises an oil tank 11, an oil pump 12, a main oil pipe 13, and a nozzle assembly 15 containing multiple nozzles 14. The oil pump 12 is located beside the oil tank 11. The inlet of the oil pump 12 is connected to the bottom of the oil tank 11 via a connecting pipe, and the outlet of the oil tank 11 is connected to the annular main oil pipe 13 via a connecting pipe. An oil delivery control valve 16 is installed on the connecting pipe between the main oil pipe 13 and the oil pump 12. Multiple nozzle assemblies 15 are located above the main oil pipe 13, and each nozzle 14 of the nozzle assembly 15 is connected to the main oil pipe 13 via a flexible hose. The function of the oil pump 12 is to draw oil stored in the oil tank 11 and deliver it to the main oil pipe 13, thereby delivering oil to the nozzles 14 of each nozzle assembly 15. This allows the oil to be sprayed into the vacuum tank 1 through the nozzles 14, whereby the oil adheres to the surface of the feed pellets entering the vacuum tank 1. The function of the oil supply control valve 16 is to seal the oil pump 12 and oil tank 11 from the vacuum tank 1, so as to prevent the oil from being sucked into the vacuum tank 1 when vacuuming.

[0022] The nozzle assembly 15 is evenly distributed on the top of the vacuum tank 1, with each nozzle 14 of the nozzle assembly 15 tilted relative to each other to ensure that each nozzle 14 faces a different direction. Since oil is a viscous liquid substance, it is difficult to atomize. The evenly distributed nozzle assembly 15 and the nozzles 14 facing different directions can effectively increase the oil delivery outlet, allowing the oil to be quickly delivered into the vacuum tank 1. At the same time, the evenly distributed nozzle assembly 15 and the nozzles 14 facing different directions can uniformly deliver oil to the top and upper middle part of the vacuum tank 1, ensuring that the oil can be evenly adsorbed onto the feed.

[0023] When using the vacuum oil spraying device for this fish feed, a sufficient quantity of expanded feed pellets is stored in the feed hopper 8 of the feeding mechanism. After the expanded feed is added, the feeding control valve 10, oil supply control valve 16, venting valve 5, and discharge valve 7 are closed respectively. The vacuum shut-off valve 6 is opened, and the vacuum pump 2 is started to evacuate the vacuum tank 1. After the vacuum level in the vacuum tank 1 reaches the process requirements, the vacuum pump 2 and the vacuum shut-off valve 6 are closed. The feeding control valve 10 at the bottom of the feed hopper 8 is opened to feed the transition chamber 9. After the transition chamber 9 is full of feed, the feeding control valve 10 at the bottom of the feed hopper 8 is closed. After the feeding control valve 10 at the bottom of the feed hopper 8 is closed, the feeding control valve 10 at the bottom of the transition chamber 9 is opened, and feed is fed from the transition chamber 9 into the vacuum tank 1. When feeding the feed into vacuum tank 1, open the oil control valve 16 and start the oil pump 12. The oil pump 12 sprays the oil stored in the oil tank 11 into vacuum tank 1 through the connecting pipe, main oil pipe 13, hose, and each nozzle 14 of each nozzle group 15, causing the oil to adhere to the feed surface. After the oil adheres to the feed surface, the oil droplets merge together to form an oil film on the feed surface. After the feed is fed, close the oil pump 12, feeding control valve 10, and oil control valve 16 respectively, and open the venting valve 5 to allow external air to enter vacuum tank 1 through the venting port 4 and vacuum pipe 3, venting the vacuum tank 1. Under atmospheric pressure, the oil film on the feed surface is squeezed into the pores inside the feed. Repeat the vacuuming and venting process multiple times to ensure that the oil completely enters the feed. After multiple vacuuming and venting processes, open the discharge valve 7 at the bottom of vacuum tank 1 to discharge the feed from vacuum tank 1.

[0024] This fish feed's vacuum oil spraying device sprays oil onto the feed surface. After spraying, the atmospheric pressure from the vacuum forces the oil adsorbed on the feed surface into the abundant pores inside the feed due to its expansion. This forces the oil into the feed, preventing it from spreading to the water surface and eliminating the barrier of air created by the oil. This allows air to effectively contact the water surface, effectively increasing dissolved oxygen levels. Simultaneously, it prevents nutrient loss due to oil diffusion, effectively ensuring the feed's nutritional value. This solves the problem of existing oil spraying devices only spraying oil onto the feed surface, causing the oil to easily spread to the water surface, resulting in the oil isolating the water from air and causing nutrient loss.

Claims

1. A vacuum oil spraying device for fish feed, which is composed of a vacuum tank (1), a vacuum pump (2), a discharging mechanism and an oil spraying mechanism, characterized in that: A vacuum pump (2) is connected to the top side of the vacuum tank (1) via a vacuum tube (3). A venting port (4) is provided at the end of the vacuum tube (3) on one side of the vacuum tank (1). A venting valve (5) is provided on the venting port (4). A vacuum shut-off valve (6) is provided on the vacuum tube (3) between the venting port (4) and the vacuum pump (2). A feeding mechanism is provided on the other side of the top of the vacuum tank (1). An oil spraying mechanism is provided on the vacuum tank (1) below the feeding mechanism. A discharge valve (7) is provided at the bottom port of the vacuum tank (1).

2. A vacuum oil spraying device for fish feed according to claim 1, characterized in that: The feeding mechanism includes a hopper (8) and a transition chamber (9). The bottom port of the hopper (8) is connected to the top-sealed transition chamber (9), and the bottom port of the transition chamber (9) is connected to the vacuum tank (1).

3. A vacuum oil spraying device for fish feed according to claim 2, characterized in that: The bottom ports of the silo (8) and the transition silo (9) are respectively equipped with discharge control valves (10).

4. The vacuum oil spraying device for fish feed according to claim 1, characterized in that: The oil spraying mechanism comprises an oil tank (11), an oil pump (12), a main oil pipe (13), and a nozzle assembly (15) containing multiple nozzles (14). An oil pump (12) is provided on the side of the oil tank (11). The inlet of the oil pump (12) is connected to the bottom of the oil tank (11) through a connecting pipe. The outlet of the oil tank (11) is connected to the annular main oil pipe (13) through a connecting pipe. Multiple nozzle assemblies (15) are provided above the main oil pipe (13). Each nozzle (14) of the nozzle assembly (15) is connected to the main oil pipe (13) through a hose.

5. A vacuum oil spraying device for fish feed according to claim 4, characterized in that: The nozzle assembly (15) is evenly distributed on the top of the vacuum tank (1), and the nozzles (14) of the nozzle assembly (15) are inclined to each other to ensure that each nozzle (14) faces a different direction.

6. A vacuum oil spraying device for fish feed according to claim 4, characterized in that: An oil delivery control valve (16) is installed on the connecting pipe between the main oil pipe (13) and the oil pump (12).

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