A pneumatic feeding structure

Abstract

This utility model discloses an air-blowing feeding structure, belonging to the field of aquaculture technology. It includes a feeding shell, a feed inlet at the top of the feeding shell, and an air inlet at the rear of the feeding shell. It also includes an air-blowing section located inside the rear of the feeding shell and connected to the feed inlet and air inlet, a constriction section connected to the front of the air-blowing section, a feeding section connected to the front of the constriction section, and a feeding inlet located in front of the feeding section. The internal space of the constriction section gradually decreases from the air-blowing section to the feeding section, and the constriction section is a "constriction throat" structure based on the Venturi effect. This air-blowing feeding structure is used in fishpond feeders. When compressed air drives the feed flow, the Venturi structure formed by the air-blowing section, constriction section, and feeding section increases the feed flow rate, thereby achieving long-distance feeding and replacing traditional mechanical scattering. This results in a feeding process with low breakage rate, high uniformity, and cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, specifically to an air-blowing feeding structure. Background Technology

[0002] In fish farming, the feeder is one of the key pieces of equipment, and its performance directly affects feed utilization, farming costs, and the aquatic environment. Traditional feeders mostly use mechanical throwing trays (such as rotating discs) to throw feed into the fishpond by mechanical force.

[0003] However, this method has the following drawbacks:

[0004] High breakage rate: Mechanical force (such as impact from a paddle) can easily cause bait particles to break, producing a large amount of powdery residue, reducing the utilization rate of bait (the powder is easy to sink to the bottom or dissolve and be lost), and at the same time polluting the water (the powder suspension increases dissolved oxygen consumption).

[0005] Short and uneven feeding distance: Mechanical throwing relies on centrifugal force or vibration. The trajectory of the bait is limited by the rotation speed and angle, making it difficult to achieve uniform coverage over a long distance. Local accumulation or omissions are likely to occur, resulting in uneven feeding by the fish.

[0006] Poor cleanability: Mechanical parts (such as paddles and screens) are prone to leaving feed residue, which can breed bacteria after long-term use, affecting the hygiene of feeding and even causing fish diseases. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an air-blowing feeding structure for a fishpond feeder. When compressed air drives the feed flow, the Venturi structure composed of an air-blowing section, a contraction section and a feeding section can increase the feed flow rate and achieve a long-distance, low breakage rate, high uniformity and clean feeding process, so as to replace the traditional mechanical throwing method.

[0008] The technical solution of this utility model is implemented as follows:

[0009] An air-blowing feeding structure includes a feeding shell, a feed inlet at the top of the feeding shell, and an air inlet at the rear end of the feeding shell; it also includes an air-blowing section located inside the rear of the feeding shell and connected to the feed inlet and the air inlet, a contraction section connected to the front of the air-blowing section, a feeding section connected to the front of the contraction section, and a feeding inlet located in front of the feeding section; the internal space of the contraction section gradually decreases from the air-blowing section to the feeding section, wherein the contraction section is a "contraction throat" structure in the Venturi effect.

[0010] By adopting the above scheme, the air-blowing feeding structure is used in fishpond feeders. When compressed air drives the feed flow, the Venturi structure composed of the air-blowing section, the contraction section and the feeding section can increase the feed flow rate, thereby achieving long-distance feeding, thus replacing the traditional mechanical scattering, and realizing a feeding process with low breakage rate, high uniformity and cleanliness.

[0011] As a preferred embodiment of the air-blowing feeding structure, the vertical cross-section of the air-blowing section is an equidistant inverted triangle (i.e., an isosceles triangle with a wider upper base and a narrower lower base, with all sides having the same slope), with a vertex angle of 60-90° and a ratio of upper base width to lower base width of 2:1-3:1. The inverted triangle cross-section can guide the bait to naturally converge to the central channel, forming a stable contact interface with the airflow entering through the air inlet.

[0012] As a preferred embodiment of the air-blowing feeding structure, a guide pipe connected to the air inlet is installed in the air-blowing section. The guide pipe extends directly from the air inlet to the contraction section, and the diameter of the guide pipe gradually decreases from the air inlet to the contraction section (i.e., the guide pipe is an axially tapered diameter pipe). The diameter of the guide pipe changes linearly along the axial direction, and its gradient slope is 0.2-0.5 mm / mm (i.e., the diameter decreases by 0.2-0.5 mm per millimeter of axial length). The tapered diameter design can accelerate the airflow speed, form a high-speed jet flow, and drive the bait to flow synchronously. At the same time, the bait is less likely to accumulate above the guide pipe after falling.

[0013] As a preferred embodiment of the air-blowing feeding structure, the vertical cross-section of the contraction section is a gradually changing V-shaped opening (i.e., the inner walls on both sides are inclined straight lines that converge at the bottom apex, and the inclination angle gradually changes along the axial direction). The ratio of its top width to its bottom width is 3:1-5:1, and the included angle is 60-100°. The gradually changing V-shaped cross-section can further constrain the mixing path of the airflow and the bait, avoid diffusion, and enhance the acceleration effect of the Venturi effect.

[0014] As a preferred embodiment of the air-blowing feeding structure, the cross-section of the feeding section is an equidistant V-shaped opening (i.e., the inner walls on both sides are parallel and inclined to form a stable flow channel); the ratio of the height H2 of the feeding section to the height H1 of the air-blowing section is 0.3-0.6:1; the length of the contraction section is 1 / 5-1 / 3 of the total length of the feeding shell; through the synergistic effect of the V-shaped cross-section of the contraction section and the feeding section, the high-speed airflow and the bait mixture are transmitted along the stable flow channel and finally sprayed out uniformly from the feeding port.

[0015] As a preferred embodiment of the air-blowing feeding structure, the front end of the feeding shell is fixedly installed with a front cover covering the area outside the feeding port by a snap-fit ​​method; the rear side of the front cover is connected with a buckle, and a groove (groove depth 5-10mm, width matching the buckle) is opened around the feeding port to cooperate with the buckle. The buckle is made of elastic plastic parts. The front cover can be quickly disassembled and assembled by the cooperation of the buckle and the groove, which is convenient for cleaning the feeding port blockage or maintaining the internal structure.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are:

[0017] 1. Low breakage rate: The bait naturally converges to the central channel through the air blowing section. After contacting the compressed air, it is carried by the airflow accelerated by the guide pipe. There is no mechanical impact or friction throughout the process (only the gentle effect of airflow and bait). The breakage rate is reduced by more than 80% compared with traditional mechanical feeding.

[0018] 2. Long-distance feeding: The gradually narrowing diameter of the guide tube and the V-shaped cross section of the contraction section together form the Venturi effect, which significantly increases the airflow velocity in the contraction section, causing the bait to form a high-speed jet. The feeding distance is 2-3 times longer than the traditional method (for example, the traditional feeding distance is 3-5m, while this structure can reach 8-12m), and the coverage is wider.

[0019] 3. High uniformity: The equidistant V-shaped cross section of the feeding section constrains the airflow and feed mixture, forming a stable jet; the flare at the feeding port, which is naturally expanded by the V-shaped cross section (the flare angle is consistent with the V-shaped angle of the feeding section), evenly disperses the jet to the fishpond, avoiding local accumulation or omission, and making the fish feed more evenly.

[0020] 4. Clean feeding: The pneumatic drive eliminates direct contact between mechanical parts and feed (only airflow interacts with the feed), avoiding the problem of residue residue in mechanical gaps; the "air film" formed by the high-speed airflow inhibits the diffusion of feed powder, reduces suspended matter on the water surface, and improves the aquaculture environment; the snap-fit ​​design of the front cover supports quick cleaning, further ensuring hygiene. Attached Figure Description

[0021] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structure for air-blown feeding. Figure 1 ;

[0023] Figure 2 A three-dimensional structure for air-blown feeding. Figure 2 ;

[0024] Figure 3 This is a left view of the air-blown feeding structure;

[0025] Figure 4 Internal structure of the air-blown feeding structure Figure 1 ;

[0026] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0027] Figure 6 Internal structure of the air-blown feeding structure Figure 2 ;

[0028] Figure 7 A three-dimensional structural diagram to illustrate the vertical cross-sectional shape of the air-blowing section;

[0029] Figure 8 A three-dimensional structural diagram to illustrate the vertical cross-sectional shape of the contraction section;

[0030] Figure 9 This is a three-dimensional structural diagram to show the vertical cross-sectional shape of the feeding section.

[0031] The markings in the diagram are: 1-feeding shell; 2-feeding inlet; 3-air inlet; 4-air blowing section; 5-contraction section; 6-feeding section; 7-feeding port; 8-guide pipe; 9-front cover; 10-clasp; 11-slot. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1 to 4As shown, an air-blowing feeding structure is provided for use in a fishpond feeder. Specifically, it includes a feeding housing 1 (made of 304 stainless steel, with strong corrosion resistance), a feed inlet 2 (connected to the feeder) at the top of the feeding housing 1, and an air inlet 3 (50mm in diameter) at the rear end of the feeding housing 1. An air compressor (omitted in the figure) is installed at the air inlet 3. During use, the air compressor is started first before feeding. It also includes an air-blowing section 4 located inside the rear of the feeding housing 1 and connected to the feed inlet 2 and air inlet 3; a contraction section 5 connected to the front of the air-blowing section 4; a feeding section 6 connected to the front of the contraction section 5; and a feeding inlet 7 located in front of the feeding section 6. The internal space of the contraction section 5 gradually decreases from the air-blowing section 4 to the feeding section 6, wherein the contraction section 5 is a "contraction throat" structure based on the Venturi effect. This air-blowing feeding structure is used in fishpond feeders. When compressed air drives the feed flow, the Venturi structure composed of the air-blowing section 4, the contraction section 5, and the feeding section 6 can increase the feed flow rate, thereby achieving long-distance feeding and replacing traditional mechanical scattering. This results in a feeding process with low breakage rate, high uniformity, and cleanliness.

[0034] like Figure 4 , Figures 6 to 7 As shown, the vertical cross-section of the air blowing section 4 is an equidistant inverted triangle (i.e., an isosceles triangle with a wider upper base and a narrower lower base, with all sides having the same slope). Its apex angle is 75°, which can be within the range of 60-90°. The ratio of the upper base width to the lower base width is 2:1, which can be within the range of 2:1-3:1. The inverted triangle cross-section can guide the bait to naturally converge to the central channel, forming a stable contact interface with the airflow entering through the air inlet 3.

[0035] like Figure 4 , Figure 6 As shown, a guide pipe 8 connected to the air inlet 3 is installed inside the air blowing section 4. The guide pipe 8 extends directly from the air inlet 3 to the contraction section 5, and the diameter of the guide pipe 8 gradually decreases from the air inlet 3 to the contraction section 5 (i.e., the guide pipe 8 is an axially tapered diameter pipe). The diameter of the guide pipe 8 is linearly tapered along the axial direction, and its tapering slope is 0.3. This slope can be within the range of 0.2-0.5 mm / mm (i.e., the diameter decreases by 0.2-0.5 mm per millimeter of axial length). The total length is 200 mm. Through the tapered diameter design, the airflow speed can be accelerated (from 0.5 m / s to 20 m / s), forming a high-speed jet flow that drives the bait to flow synchronously. At the same time, the bait is less likely to accumulate above the guide pipe 8 after falling.

[0036] like Figure 4 , Figures 6 to 8As shown, the vertical cross-section of the contraction section 5 is a gradually changing V-shaped opening (i.e., the inner walls on both sides are inclined straight lines that converge at the bottom apex, and the inclination angle gradually changes along the axial direction). The ratio of its top width to its bottom width is 4:1, which can be in the range of 3:1 to 5:1. The included angle is 90°, which can be in the range of 60 to 100°. The gradually changing V-shaped cross-section can further constrain the mixing path of the airflow and the bait, avoid diffusion, and enhance the acceleration effect of the Venturi effect.

[0037] like Figure 4 , Figures 6 to 9 As shown, the cross-section of the feeding section 6 is an equidistant V-shaped opening (i.e., the inner walls on both sides are parallel and inclined, forming a stable flow channel); the ratio of the height H2 (36mm) of the feeding section 6 to the height H1 (120mm) of the air blowing section 4 is 0.3, which can be in the range of 0.3-0.6:1, and the included angle is 90°, which can be in the range of 60-100°; the length of the contraction section 5L is 1 / 4 of the total length of the feeding shell 1 (assuming the total length is 400mm, then L=100mm), which can be in the range of 1 / 5-1 / 3; through the synergistic effect of the V-shaped cross-section of the contraction section 5 and the feeding section 6, the high-speed airflow and the bait mixture are transmitted along the stable flow channel and finally sprayed out evenly from the feeding port 7.

[0038] like Figures 4 to 6 As shown, the front end of the feeding housing 1 is fixedly installed with a front cover 9 (made of food-grade PP plastic) that covers the area outside the feeding port 7 by a snap-fit ​​method; a buckle 10 is connected to the rear side of the front cover 9, and a slot 11 is opened around the feeding port 7 to cooperate with the buckle 10 (the slot 11 is 5mm deep, and the depth can be in the range of 5-10mm, and the width matches the buckle 10). The buckle 10 is made of elastic plastic. The front cover 9 can be quickly disassembled and assembled by the cooperation of the buckle 10 and the slot 11, which is convenient for cleaning the blockage of the feeding port 7 or maintaining the internal structure.

[0039] like Figure 4 As shown, the working principle of this utility model is as follows:

[0040] Bait convergence: The bait falls from the feed inlet 2 into the air blowing section 4, and naturally converges to the central channel due to the inverted triangular cross section;

[0041] Airflow acceleration: The air compressor supplies air through the air inlet 3 and the guide pipe 8. The compressed air is accelerated along the gradually narrowing guide pipe 8 (the flow velocity increases from 0.5m / s to 20m / s) to form a high-speed jet.

[0042] Driven by the Venturi effect: High-speed airflow enters the gradually changing V-shaped channel of the contraction section 5, and is further accelerated due to the reduction in cross-sectional area (flow velocity increases to 25m / s), which drives the bait particles to move towards the feeding section 66 in a "suspended state".

[0043] Uniform feeding: The equidistant V-shaped channels of feeding section 6 constrain the airflow and the bait mixture, which is finally sprayed out from the feeding port 7 to form a uniform fan-shaped bait cloud (covering the water surface with a diameter of 8-12m).

[0044] Maintenance and cleaning: After feeding is completed, remove the front cover 9 by using the clip 10, clean any debris that may remain in the feeding port 7, or check the internal structure (such as the guide pipe 8 and the contraction section 5).

[0045] In summary, this embodiment achieves pneumatic and gentle feeding by using a Venturi structure consisting of an air blowing section 4, a contraction section 5, and a feeding section 6, combined with the gradually narrowing diameter design of the guide pipe 8. This effectively reduces the feed breakage rate, improves feeding uniformity and cleanliness, and supports long-distance feeding, making it suitable for the efficient and environmentally friendly feeding needs of fishpond aquaculture.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An air-blowing feeding structure, comprising a feeding shell, a feeding port opened at the top of the feeding shell, and an air inlet opened at the rear end of the feeding shell; Its features are: It also includes an air blowing section located inside the rear of the feeding shell and connected to the feed inlet and air inlet, a contraction section connected to the front of the air blowing section, a feeding section connected to the front of the contraction section, and a feeding port opened in front of the feeding section; the internal space of the contraction section gradually decreases from the air blowing section to the feeding section.

2. The air-blowing feeding structure according to claim 1, characterized in that: The vertical cross-section of the air-blowing section is an equidistant inverted triangular opening.

3. The air-blowing feeding structure according to claim 2, characterized in that: The air blowing section is equipped with a guide pipe connected to the air inlet. The guide pipe extends directly from the air inlet to the contraction section, and the diameter of the guide pipe gradually decreases from the air inlet to the contraction section.

4. The air-blowing feeding structure according to claim 3, characterized in that: The diameter of the guide tube changes linearly along the axial direction, with a gradient slope of 0.2-0.5 mm / mm.

5. The air-blowing feeding structure according to claim 1, characterized in that: The vertical cross-section of the contraction section has a gradually changing V-shape.

6. The air-blowing feeding structure according to claim 5, characterized in that: The cross-section of the feeding section is an equidistant V-shaped opening.

7. The air-blowing feeding structure according to claim 6, characterized in that: The ratio of the height H2 of the feeding section to the height H1 of the air blowing section is 0.3-0.6:1; the length of the contraction section is 1 / 5-1 / 3 of the total length of the feeding shell.

8. The air-blowing feeding structure according to any one of claims 1-7, characterized in that: The front end of the feeding housing is fixedly installed with a front cover covering the area outside the feeding port by a snap-fit ​​method; the rear side of the front cover is connected with a buckle, and a slot for cooperating with the buckle is opened around the feeding port.

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