Gas stripping shrimp shell collecting device suitable for factory-like circulating water culture pond

Abstract

The utility model discloses an air-lift shrimp shell collecting device suitable for a factory circulating water culture pond, which relates to the technical field of aquaculture and comprises an L-shaped water outlet pipe, an air-lift cover is fixedly sleeved at the lower end of the water outlet pipe, an air inlet nozzle is arranged on the side surface of the air-lift cover, an inner pipeline communicated with the water outlet pipe is fixedly mounted in the air-lift cover, and the air inlet nozzle is communicated with the air outlet pipe. A plurality of uniformly distributed air inlet holes are formed in the outer surface of the inner pipeline; the lower end of the inner pipeline is communicated with a lower pipeline, a pot bottom is inserted into the bottom of the lower pipeline, and a step with a hole is arranged at the bottom of the pot bottom. By arranging the water outlet pipe, the inner pipeline and the lower pipeline, a complete gas stripping pipeline can be formed, gas can be supplied to the interior of the pipeline in cooperation with the gas stripping cover and the gas inlet cavity and the gas inlet hole in the gas stripping cover, prawn shells can be extracted through gas stripping, the interior of the whole pipeline is free of obstacles, resistance from a nano aeration pipe in a traditional pipeline is reduced, and the prawn shells float upwards without obstacles; the gas efficiency is improved.

Description

An airlift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds Technical Field

[0001] This utility model relates to the field of aquaculture technology, and in particular to an air-lift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds. Background Technology

[0002] In factory-scale recirculating aquaculture systems, timely removal of uneaten feed and feces such as shrimp shells is a key step in maintaining stable water quality. Traditional airlift shrimp shell collection devices typically employ a design with nano-aeration tubes fixed inside the outlet pipe. The shrimp shells are collected by generating an upward water flow through aeration. However, the installation of aeration tubes can occupy internal pipe space, creating flow obstruction and preventing the shrimp shells from floating freely, thus reducing airlift efficiency. Furthermore, it can easily cause shrimp shells to become entangled or accumulate on the surface of the aeration tubes, posing a risk of pipe blockage, affecting the device's extraction capacity, and increasing maintenance costs. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides an airlift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds, solving the technical problems mentioned in the background section.

[0004] To solve the above technical problems, the present invention provides the following technical solution: an air-lift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds, including an L-shaped water outlet pipe, an air-lift cover fixedly fitted at the lower end of the water outlet pipe, an air inlet provided on the side of the air-lift cover, and an inner pipe connected to the water outlet pipe fixedly installed inside the air-lift cover, with multiple evenly distributed air inlets on the outer surface of the inner pipe.

[0005] The lower end of the inner pipe is connected to a lower pipe, and a pot bottom is inserted into the bottom of the lower pipe. The bottom of the pot bottom is provided with a perforated step. The lower end of the lower pipe extends into the perforated step, and the outer surface of the lower pipe is provided with a groove that is flush with the perforated step. A large and small pot lid is fixedly fitted on the outside of the lower pipe.

[0006] Furthermore, the distance between the bottom edge of the large and small pot lid and the inner wall of the pot bottom is 30mm.

[0007] Furthermore, the groove is provided with three openings, which are evenly distributed circumferentially around the axis of the water outlet pipe.

[0008] Furthermore, the diameter of the air inlet is 1-2 mm, and the number of air inlets is not less than 200.

[0009] Furthermore, an air intake chamber is formed between the inner wall of the air lifting hood and the outer wall of the inner pipe, and the air intake nozzle is connected to the air intake chamber.

[0010] Furthermore, the multi-headed pot lid is made of finished PVC multi-headed fittings.

[0011] By employing the above technical solution, this utility model provides an airlift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds, which has at least the following beneficial effects:

[0012] 1. This utility model can form a complete air-lift pipeline by setting up an outlet pipe, an inner pipe and a lower pipe. With the air-lift hood and its internal air inlet chamber and air inlet hole, air can be supplied into the pipeline. The shrimp shells are extracted by air lifting. The entire pipeline is unobstructed, which reduces the resistance from the nano-aeration tube in traditional pipelines, allowing the shrimp shells to float without obstruction and improving gas efficiency.

[0013] 2. This utility model has a 30mm gap between the lid and the bottom of the pot, which ensures that the shrimp shells can enter the bottom of the pot smoothly. The lower pipe has three circumferentially evenly distributed slots, which provide multiple channels for the shrimp shells to enter the lower pipe, reducing the risk of blockage of the slots and ensuring that the shrimp shells can be smoothly extracted from the bottom of the pot into the lower pipe. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

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

[0016] Figure 2 is a cross-sectional view of the overall structure of this utility model;

[0017] Figure 3 is a schematic diagram of the air lifting hood and inner pipe structure of this utility model;

[0018] Figure 4 is a schematic diagram of the lower pipe structure of this utility model.

[0019] In the diagram: 1. Water outlet pipe; 2. Air lift hood; 201. Air inlet nozzle; 202. Inner pipe; 203. Air inlet hole; 204. Air inlet chamber; 3. Lower pipe; 301. Groove opening; 4. Bottom of the pot; 401. Step with perforation; 5. Large and small pot lids. Detailed Implementation

[0020] 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.

[0021] Traditional airlift shrimp shell collection devices typically employ a design with nano-aeration tubes fixed inside the outlet pipe. The shrimp shells are collected by generating an upward water flow through aeration. However, the installation of aeration tubes can occupy internal pipe space, creating flow obstruction and preventing the shrimp shells from floating freely, thus reducing airlift efficiency. Furthermore, it can easily cause shrimp shells to become entangled or accumulate on the surface of the aeration tubes, posing a risk of pipe blockage, affecting the device's extraction capacity, and increasing maintenance costs.

[0022] To address the shortcomings of the aforementioned air-lift shrimp shell collection device during use, please refer to Figures 1-4. This invention provides an air-lift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds, which reduces the resistance of the aeration pipeline to the upward lifting of shrimp shells in traditional devices, thus achieving more efficient shrimp shell collection. This air-lift shrimp shell collecting device uses an L-shaped outlet pipe 1 as its base. The upper end of the outlet pipe 1 is connected to an external shrimp collecting frame, and the lower end of the outlet pipe 1 is fixedly fitted with an air-lift cover 2. An air inlet 201 is provided on the side of the air-lift cover 2, and the air inlet 201 is connected to an external air supply device. An inner pipe 202 connected to the outlet pipe 1 is fixedly installed inside the air-lift cover 2. Multiple evenly distributed air inlets 203 are opened on the outer surface of the inner pipe 202. A lower pipe 3 is connected to the lower end of the inner pipe 202. A pot bottom 4 is inserted into the bottom of the lower pipe 3. The pot bottom 4 is made of PVC, PP, or stainless steel. The pot bottom 4 is fixed to the bottom of the external canvas aquaculture pond and becomes an integral part of the aquaculture pond. If the aquaculture pond is a concrete pond, the pot bottom 4 can also be cast in concrete. The bottom of the pot bottom 4 is provided with a perforated step 401. The lower pipe 3... The lower pipe 3 extends into the perforated step 401, and the outer surface of the lower pipe 3 is provided with a groove 301 flush with the perforated step 401. Shrimp shells flowing into the bottom of the pot 4 can enter the lower pipe 3 through the groove 301. The lower pipe 3 is fixedly fitted with a large and small pot cover 5, which is located between the air lifting cover 2 and the bottom of the pot 4. When all the shrimp shells are concentrated at the bottom of the lower pipe 3, the air supply device can be driven to introduce air into the air lifting cover 2. The air pressure is determined according to the water depth of the aquaculture pond. Air can be introduced into the inner pipe 202 through the air inlet 203 to achieve air lifting, and then the shrimp shells can be extracted into the shrimp collection frame. Compared with the traditional method of directly fixing the nano aeration tube to the gas pipeline, this solution can reduce the resistance from the nano aeration tube in the pipeline. The water outlet pipe 1, the inner pipe 202 and the lower pipe 3 can form a complete pipeline, so that the shrimp shells float up without obstruction.

[0023] Since the shrimp shells need to slide into the bottom of the pot 4, the large and small pot lids 5 cannot directly contact the bottom of the pot 4. The distance between the bottom edge of the large and small pot lids 5 and the inner wall of the bottom of the pot 4 is 30mm. This 30mm gap allows the shrimp shells to slide into the bottom of the pot 4 so that they can be extracted later. In addition, the large and small pot lids 5 can reduce the open area of ​​the bottom of the pot 4 during air extraction, thereby increasing the suction force during air extraction and improving extraction efficiency.

[0024] It is also necessary to ensure the flowability of the slot 301. Therefore, there are three slots 301. The three slots 301 are evenly distributed around the axis of the water outlet pipe 1. The three slots 301 provide multiple channels for shrimp shells to enter the lower pipe 3. The three evenly distributed slots 301 can make the water flow form a more stable vortex in the bottom of the pot 4, ensuring that the water flow and shrimp shells enter the pipe evenly, which can reduce the risk of blockage of the slots 301.

[0025] Referring to Figure 3, the diameter of the air inlet 203 is 1-2 mm, and the number of air inlets 203 is not less than 200. A large number of air inlets 203 can ensure that sufficient gas enters the pipe, forming a dense bubble group, increasing the upward speed of the water flow, and enhancing the shrimp shell extraction ability. An air inlet chamber 204 is formed between the inner wall of the air lifting cover 2 and the outer wall of the inner pipe 202. The air inlet nozzle 201 is connected to the air inlet chamber 204. The external air supply equipment can intake air through the air inlet nozzle 201 and the air inlet chamber 204, and smoothly deliver the gas to the inner pipe 202 to realize air lifting.

[0026] Furthermore, the multi-headed pot lid 5 uses pre-made PVC multi-headed fittings, which facilitates daily procurement and reduces production costs.

[0027] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. An air-lift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds, characterized in that: The device includes an L-shaped water outlet pipe (1), with an air lift hood (2) fixedly fitted at the lower end of the water outlet pipe (1). An air inlet (201) is provided on the side of the air lift hood (2), and an inner pipe (202) connected to the water outlet pipe (1) is fixedly installed inside the air lift hood (2). Multiple evenly distributed air inlets (203) are provided on the outer surface of the inner pipe (202). A lower pipe (3) is connected to the lower end of the inner pipe (202), and a pot bottom (4) is inserted into the bottom of the lower pipe (3). A perforated step (401) is provided at the bottom of the pot bottom (4). The lower end of the lower pipe (3) extends into the perforated step (401), and a groove (301) flush with the perforated step (401) is provided on the outer surface of the lower pipe (3). A large and small pot lid (5) is fixedly fitted on the outside of the lower pipe (3).

2. The air-lift shrimp shell collection device for factory-scale recirculating aquaculture ponds according to claim 1, characterized in that: The distance between the bottom edge of the large and small pot lid (5) and the inner wall of the pot bottom (4) is 30mm.

3. The air-lift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds according to claim 1, characterized in that: The groove (301) is provided in three parts, and the three grooves (301) are evenly distributed around the axis of the water pipe (1).

4. The air-lift shrimp shell collection device for factory-scale recirculating aquaculture ponds according to claim 1, characterized in that: The diameter of the air inlet (203) is 1-2 mm, and the number of air inlets (203) is not less than 200.

5. The air-lift shrimp shell collection device suitable for factory-scale recirculating aquaculture ponds according to claim 1, characterized in that: An air intake chamber (204) is formed between the inner wall of the air lifting hood (2) and the outer wall of the inner pipe (202), and the air intake nozzle (201) is connected to the air intake chamber (204).

6. The airlift shrimp shell collection device for factory-scale recirculating aquaculture ponds according to claim 1, characterized in that: The large and small pot lid (5) is made of finished PVC large and small head accessories.

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