Screening device for batch detection of procambarus clarkii
By using a screening device with an inverted conical screening net and a graded enclosure structure, combined with a circulating water filtration system and a low-temperature thermostat, the problem of the difficulty in screening Procambarus clarkii has been solved, and efficient and safe batch sorting has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-17
AI Technical Summary
The lack of adaptive design for the movement characteristics of crustaceans in existing technologies makes the process of screening viable and culling individuals of Procambarus clarkii difficult and labor-intensive, making it difficult to achieve industrialization of batch sorting.
A screening device including an inverted conical screening net and a graded enclosure structure was designed. By dividing the test pool into multiple areas, shrimp are allowed to move in a specific environment. The shrimp are graded by the opening and closing state of the enclosure and the anti-climbing grooves. Combined with a circulating water filtration system and a low temperature thermostat, the automatic grading and collection of shrimp can be achieved.
It reduces workload, improves screening efficiency, ensures shrimp safety and screening results accuracy, and is suitable for industrial-scale batch testing.
Smart Images
Figure CN223994202U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of shrimp farming equipment, and in particular to a screening device for batch testing of red swamp crayfish. Background Technology
[0002] The red swamp crayfish (Procambarus clarkii) has become one of the most important freshwater crayfish germplasm resources in my country. During the cultivation of red swamp crayfish, it is necessary to observe their growth status in a timely manner, identify their characteristics, and select those that meet the required standards.
[0003] Because existing technologies lack adaptive designs for the movement characteristics of crustaceans, the process of screening viable individuals and eliminating those that are eliminated is difficult and labor-intensive, making it hard to industrialize mass sorting. Utility Model Content
[0004] To address the shortcomings of existing production technologies, the applicant provides a reasonably structured screening device for batch testing of red swamp crayfish. By constructing an inverted conical screening net and a graded enclosure structure, multiple areas are divided in a test pool, allowing the crayfish to move in a specific environment. Crayfish that move into different areas are classified into different grades, reducing workload and improving screening efficiency.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A screening device for batch detection of red swamp crayfish includes several measuring pools, each containing a containment net. At least two levels of screening spaces are separated within the area enclosed by the containment net, and the containment net and the screening spaces are interconnected. A collection trough is connected to the output end of the containment net.
[0007] The measuring pool is connected to a circulating water filter chamber and a low-temperature thermostat. Pipelines connect the measuring pool to the circulating water filter chamber and to the low-temperature thermostat.
[0008] As a further improvement to the above technical solution:
[0009] The containment net is set as an inverted cone-shaped net, and the collection trough is attached to the small end of the containment net.
[0010] In the conical space formed by the containment net, multiple levels of fencing are stacked, and adjacent fencing can be connected.
[0011] During the test, the enclosure is closed; after cooling to the expected temperature for a specified period of time, the enclosure is opened. Specifically, at the beginning of the test, the enclosure is closed; after the shrimp are placed in position, cooling begins, and after cooling to the set temperature, this temperature is maintained for 5 minutes, during which the shrimp are exposed to this temperature environment. Then the enclosure is opened, and the still viable shrimp enter the next level of space.
[0012] The side walls of the enclosure are equipped with anti-climb grooves.
[0013] The anti-climbing grooves have a trapezoidal cross-section, and multiple anti-climbing grooves are arrayed on the side wall of the enclosure facing the red swamp crayfish.
[0014] The fence and the containment net are connected by clips.
[0015] The circulating water filtration chamber serves as the water source for the screening device. The water flows sequentially through the circulating water filtration chamber, the low-temperature thermostat, the measuring pool, and back to the circulating water filtration chamber.
[0016] An overflow pipe is installed at the opening of the measuring pool, and a normally closed drain pipe is installed at the bottom of the measuring pool.
[0017] The outlet of the overflow pipe is connected to the inlet of the circulating water filter chamber.
[0018] The beneficial effects of this utility model are as follows:
[0019] The screening device provided by this utility model divides the test pool into three different levels of areas by setting up an openable and closable enclosure, allowing shrimp to move in a specified environment. The shrimp are classified according to their level based on the amount of movement, and the classified shrimp are easy to collect.
[0020] Moreover, all the structures in the test tank have little impact on the shrimp themselves, and will not harm or interfere with the shrimp, thus minimizing the interference of other variables on the screening experiment.
[0021] The enclosure structure of this utility model is equipped with anti-climbing grooves to prevent shrimp from affecting the subsequent screening results due to excessive activity range. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the screening device of this utility model.
[0023] Figure 2 This is a schematic diagram of a single measuring cell structure of this utility model.
[0024] Figure 3 This is a schematic diagram of the anti-climbing groove on the side wall of the enclosure in this utility model.
[0025] Figure 4 This is a top view of the overall structure of the screening device of this utility model.
[0026] Figure 5 This is a chart analyzing the results of a certain experiment.
[0027] The components include: 1. Low-temperature thermostat; 11. Low-temperature thermostat inlet pipe; 12. Low-temperature thermostat outlet pipe; 2. Circulating water filter chamber; 21. Circulating water filter chamber inlet pipe; 3. Measuring pool; 31. Inverted cone mesh; 32. Enclosure; 321. Primary enclosure; 322. Secondary enclosure; 323. Buckle; 324. Anti-climb groove; 33. Collection trough; 34. Measuring pool inlet pipe; 35. Overflow pipe; 36. Drainage pipe. Detailed Implementation
[0028] The specific embodiments of this utility model are described below with reference to the accompanying drawings.
[0029] like Figures 1-5 As shown, the screening device for batch detection of red swamp crayfish in this embodiment includes several measuring pools 3, each measuring pool 3 is equipped with a containment net, and at least two levels of screening space are separated in the area enclosed by the containment net. The containment net and the screening space can be connected. The output end of the containment net is connected to a collection trough 33.
[0030] The measuring pool 3 is connected to the circulating water filter chamber 2 and the low temperature thermostat 1. The measuring pool 3 and the circulating water filter chamber 2 are connected by pipelines, and the circulating water filter chamber 2 and the low temperature thermostat 1 are connected by pipelines.
[0031] The receiving net is set as an inverted cone net 31, and the collection trough 33 is attached to the small end of the receiving net.
[0032] In the conical space formed by the containment net, multiple levels of enclosures 32 are stacked, and adjacent enclosures 32 can be connected.
[0033] During the test, only the single-level enclosure 32 was in a connected and open state.
[0034] The side wall of the enclosure 32 is provided with anti-climb grooves 324.
[0035] The anti-climbing groove 324 has a trapezoidal cross-section, and multiple anti-climbing grooves 324 are arrayed on the side wall of the enclosure 32 facing the red swamp crayfish.
[0036] The enclosure 32 is connected to the containment net by a buckle 323.
[0037] The circulating water filtration chamber 2 is the water source for the screening device. The water flows sequentially through the circulating water filtration chamber 2, the low temperature thermostat 1, the measuring pool 3, and the circulating water filtration chamber 2.
[0038] The measuring pool 3 is equipped with an overflow pipe 35 at its opening and a normally closed drain pipe 36 at its bottom.
[0039] The outlet of the overflow pipe 35 is connected to the inlet of the circulating water filter chamber 2.
[0040] The overall structure and usage of this utility model are as follows:
[0041] like Figure 1 As shown, the screening device in this embodiment includes a low-temperature thermostat, a circulation system, a measuring tank, and a recording system. The screening device can be used to screen red swamp crayfish based on multiple variable factors and classify the crayfish into grades. This embodiment illustrates a process for screening the cold resistance of red swamp crayfish.
[0042] like Figure 2 and Figure 4 As shown, a screening device has multiple measuring pools 3, each with a depth greater than or equal to 60 cm. Each measuring pool 3 contains an inverted conical net 31. The cone angle of the inverted conical net 31 is controlled between 40° and 60°, and the diameter of the cone opening is designed to be 1.5-2.0 times the width of the shrimp. Two transparent barriers are installed above the opening: a primary barrier 321 and a secondary barrier 322. These barriers are used for automatic shrimp grading. The primary barrier 321 is located directly above the secondary barrier 322. Each barrier is 30 cm high, and the vertical distance between the primary and secondary barriers 321 and 322 is 30 cm. The lower end of the inverted conical net 31 is connected to the upper part of the collection trough 33, and a drain pipe 36 is installed at the bottom of the measuring pool.
[0043] A low-temperature thermostat 1 is installed outside the measuring pool 3, with a specific low-temperature gradient set such as 2℃, 4℃, 6℃, 8℃, and 10℃. After the ambient temperature of the shrimp's environment drops to the target temperature, the shrimp are placed outside the primary enclosure 321 and their condition is observed for five minutes. At this time, the primary enclosure 321 and the secondary enclosure 322 are closed, meaning both enclosures are connected to the inverted cone net 31. Then, the primary enclosure 321 is opened, while the secondary enclosure 322 remains closed. Vigorous shrimp will crawl into the primary enclosure 321. After five minutes, the secondary enclosure 322 is opened, and vigorous shrimp continue to crawl into it. Ultimately, individuals with sufficient vitality and good condition remain in the inverted cone net 31, while those with insufficient vitality are eliminated and slide into the collection trough 33 through the lower end of the inverted cone net 31.
[0044] The connection method between the opening of the collection trough 33 and the inverted cone net 31 is the same as that between the enclosure 32 and the inverted cone net 31, which facilitates quick disassembly and assembly, resulting in higher efficiency in the recovery of discarded shrimp. The bottom of the collection trough 33 is equipped with a 20mm drain outlet, and the collection trough 33 is transparent to facilitate observation of the collection process.
[0045] It should be noted that the inverted cone mesh 31 has an aperture of 5-10mm, which ensures normal water flow while effectively supporting live red swamp crayfish during testing and facilitating their movement. For example... Figure 3As shown, the outer walls of the first-level enclosure 321 and the second-level enclosure 322 are designed with anti-climbing grooves 324. The groove cross-section adopts a continuous trapezoidal cross-section, with specific dimensions of: top width 3-5mm, bottom width 2-3mm, and depth 2-3mm.
[0046] The average length of the claws at the end of the walking legs of the red swamp crayfish is 0.8-1.2 mm. When the legs of the red swamp crayfish come into contact with the anti-climbing groove 324, the claws at the end of its walking legs cannot effectively embed into the bottom of the groove, resulting in a decrease in adhesion and making it difficult for the crayfish to continue climbing.
[0047] The two layers of enclosure 32 and the inverted cone net 31 in the measuring pool 3 can be disassembled and assembled without tools through the buckle 323. The single operation time of the buckle structure is less than 10 seconds, which facilitates rapid assembly before batch testing and cleaning and maintenance after the experiment. In addition, there is no protruding structure after the buckle 323 is locked, which avoids the shrimp being scratched by sharp edges.
[0048] As a further optimization, the screening device also includes a circulation mechanism. Water is first pressurized by a pump built into the circulating water filter chamber 2, and then enters the device's multi-stage filtration system for further treatment. After this series of filtration steps, the purified water is introduced into the cryogenic thermostat 1 via the filter chamber outlet pipe, i.e., the cryogenic thermostat inlet pipe 11. In this device, the water temperature is effectively reduced. Afterward, the cooled water flows into the measuring pool inlet pipe 34 through the cryogenic thermostat outlet pipe 12. During this process, the water flow rate can be controlled via a precision valve. Once the water level in the measuring pool 3 rises to the same height as the overflow pipe 35, excess water will be discharged along the overflow pipe 35 and eventually flow back to the circulating water filter chamber inlet pipe 21, thus forming a closed-loop circulation process.
[0049] like Figure 1 As shown, the bottom of the measuring tank 3 is equipped with a drain pipe 36, which remains closed under normal conditions. The device uses a self-circulating cooling system for water temperature control, and a filter chamber for water quality regulation. Due to the short testing time, frequent water changes are generally unnecessary. The drain is only opened for water replacement when the water quality deteriorates or the dissolved oxygen level drops below the experimental requirements, ensuring that the water quality in the measuring tank meets experimental standards.
[0050] The above structure can be achieved by purchasing commercially available water circulation equipment with filtration function.
[0051] All of the above structures can be connected to a control computer. The control computer has built-in various integrated temperature and humidity sensors, cameras, and data processing software, which can automatically record temperature, time, and possible abnormal behaviors during the detection process. This provides a comprehensive and accurate basis for the analysis and evaluation of experimental data, and helps to gain a deeper understanding of the cold-resistance characteristics of the red swamp crayfish. The control computer is a commonly used technology; the control principle will not be elaborated in this embodiment.
[0052] The filtering results are as follows Figure 5 As shown, by gradually cooling a large batch of shrimp to 10℃, 6℃, and 2℃, the results can be obtained quickly and effectively, showing that 20% of the shrimp exhibited no significant difference in behavior under the cooling conditions compared to normal water temperature.
[0053] The method for cold-resistant strains of Procambarus clarkii in this embodiment includes the following steps:
[0054] S1: Transfer the red swamp crayfish to be tested to the area outside the first-level enclosure 321, start the low-temperature thermostat 1, set the target temperature gradient through the controller: 2℃, 4℃, 6℃, 8℃, 10℃, and start the circulation system to establish a closed water circulation.
[0055] S2: After reaching the target temperature, after 5 minutes of low-temperature exposure, the first-level enclosure 321 is removed, allowing the eliminated individuals to slide into the boundary area between the second-level enclosure 322 and the inverted cone net 31; after an interval of 5 minutes, the second-level enclosure 322 is removed; the individuals that finally slide down through the top opening of the inverted cone net into the collection trough are counted in the eliminated population, and the remaining individuals are retained as cold-resistant candidate germplasm.
[0056] S3: After the test is completed, disassemble the enclosure, collection tank and other parts, and clean and maintain them to avoid residual shrimp or impurities affecting the next test.
[0057] Using the screening device of this application to screen shrimp has the following advantages:
[0058] The inverted cone-shaped net in the measuring pool features a unique design. The settings for parameters such as the cone angle, the diameter of the cone opening, the height of the enclosure, and the spacing, combined with the collection trough, enable effective grading of shrimp during the testing process. Normally active shrimp crawl along the cone surface or move freely around the enclosure, while weaker, less vigorous individuals slide into the collection trough, improving screening efficiency and reducing the time and effort required for manual selection.
[0059] The device is equipped with a circulation system, including a circulating water filtration chamber, featuring a multi-stage filtration system. The physical filtration layer's advantages lie in its efficient interception of residual feed and feces, preventing the accumulation of ammonia nitrogen caused by the slow decomposition of organic matter at low temperatures. The biological filtration layer's advantages lie in its use of low-temperature-resistant nitrifying bacteria and special filter media, enhancing the conversion efficiency of ammonia nitrogen and nitrite under low-temperature conditions. The chemical filtration layer's advantages lie in its adsorption of harmful substances that may precipitate at low temperatures, such as heavy metal ions, and its use of ultraviolet light to sterilize and inhibit the proliferation of low-temperature pathogens.
[0060] The control computer can automatically record the temperature, time, and possible abnormal behavior during the testing process, providing a comprehensive and accurate basis for the analysis and evaluation of experimental data, and helping to gain a deeper understanding of the cold resistance characteristics of the red swamp crayfish.
[0061] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.
Claims
1. A screening device for bulk detection of Procambarus clarkia, characterized by: The measuring pool (3) is provided with a containing net, at least two screening spaces are separated in the area surrounded by the containing net, and the containing net is in communication with the screening spaces; the output end of the containing net is connected with a collecting groove (33), The measuring pool (3) is connected with a circulating water filtering cabin (2) and a low-temperature thermostat (1), the measuring pool (3) is connected with the circulating water filtering cabin (2) through a pipeline, and the circulating water filtering cabin (2) is connected with the low-temperature thermostat (1) through a pipeline.
2. The screening device for batch detection of procambarus clarkii according to claim 1, wherein: The containing net is a reverse cone net (31), and the collecting groove (33) is connected to the small end of the containing net.
3. The screening device for batch detection of procambarus clarkia according to claim 2, characterized in that: A plurality of surrounding fences (32) are arranged in the conical space formed by the containing net, and the surrounding fences (32) are in communication with each other.
4. The screening device for batch detection of procambarus clarkia according to claim 3, characterized in that: In a test state, the surrounding fence (32) is in a closed state; after being cooled to a desired temperature for a specified period of time, the surrounding fence (32) is in an open state.
5. The screening device for batch detection of procambarus clarkia according to claim 3, characterized in that: The side wall of the surrounding fence (32) is provided with an anti-climbing groove (324).
6. The screening device for batch detection of procambarus clarkia according to claim 5, characterized in that: The anti-climbing groove (324) is in a trapezoidal shape, and a plurality of anti-climbing grooves (324) are arranged on the side wall of the surrounding fence (32) in an array.
7. The screening device for batch detection of procambarus clarkia according to claim 3, characterized in that: The surrounding fence (32) is connected with a buckle (323) and the containing net.
8. The screening device for batch detection of procambarus clarkia according to claim 1, wherein: The circulating water filtering cabin (2) is a water source of the screening device, and water flows through the circulating water filtering cabin (2), the low-temperature thermostat (1), the measuring pool (3) and the circulating water filtering cabin (2) in sequence.
9. The screening device for batch detection of procambarus clarkii according to claim 8, wherein: The measuring pool (3) is provided with an overflow pipe (35) at the mouth, and a normally closed drain pipe (36) is arranged at the bottom of the measuring pool (3).
10. The screening device for batch detection of procambarus clarkii according to claim 8, wherein: The water outlet of the overflow pipe (35) is connected to the water inlet of the circulating water filtering cabin (2).