A water exchange device for freshwater rotifer farming

Abstract

This utility model relates to the field of microbial culture technology, and provides an auxiliary water exchange device for freshwater rotifer cultivation, comprising: a cultivation tank with one open side; a light-shielding component disposed on the outer periphery of the cultivation tank to block external ambient light; a light source component disposed corresponding to the open side of the cultivation tank for inducing freshwater rotifers; a separating component disposed inside the cultivation tank for separating freshwater rotifers from wastewater; a drain pipe disposed at the bottom of the cultivation tank and connected to the interior of the cultivation tank for discharging wastewater; and a valve disposed at the outlet end of the drain pipe. This utility model uses a light-shielding component on the outer periphery of the cultivation tank to avoid interference from external ambient light, while simultaneously controlling the internal light field structure. The light source component disposed at the open side of the cultivation tank provides an inducing light source, causing freshwater rotifers to gather towards the light source. The separating component separates the freshwater rotifers from the wastewater, achieving "rotifer-water separation," and the wastewater is discharged through the drain pipe, thus assisted in water exchange.

Description

Technical Field

[0001] This utility model relates to the field of microbial culture technology, and in particular to an auxiliary water exchange device for freshwater rotifer culture. Background Technology

[0002] Freshwater rotifers are small, slow-moving, and nutrient-rich, making them an important initial food source for larvae during the breeding process of fish, shrimp, and crabs. In intensive breeding or indoor aquaculture settings, high-density continuous culture is often carried out using small to medium-sized fiberglass tanks, glass, or acrylic containers. Especially during peak freshwater rotifer farming seasons, the accumulation of metabolic waste and uneaten feed (algae, organic debris, yeast, etc.) leads to water quality deterioration, inhibiting rotifer reproduction and causing mortality, necessitating water quality control. One traditional water quality control strategy for freshwater rotifer farming is regular water changes. Due to the small size of freshwater rotifers, mostly between 100-250 micrometers, fine-mesh filtration systems are often used to prevent rotifer loss. However, after prolonged operation, the mesh is prone to clogging. If not cleaned promptly, this often leads to filtration system failure, making water changes impossible. Utility Model Content

[0003] This invention provides an auxiliary water exchange device for freshwater rotifer farming, which solves the technical problems in existing freshwater rotifer farming water exchange devices, such as the filtration system being easily blocked, leading to inconvenience in water exchange and affecting the reproduction of freshwater rotifers.

[0004] This utility model provides an auxiliary water exchange device for freshwater rotifer farming, comprising: The breeding tank has an open side. A light-shading component is disposed on the outer periphery of the breeding tank to block external ambient light from the breeding tank. The light source assembly is configured to correspond to the open end of the breeding tank and is used to induce freshwater rotifers; A separator, disposed in the breeding tank, is used to separate the freshwater rotifers from the wastewater; A drain pipe is installed at the bottom of the breeding tank and communicates with the interior of the breeding tank for discharging the wastewater; A valve is installed at the outlet end of the drain pipe.

[0005] According to the present invention, a water-changing auxiliary device for freshwater rotifer farming is provided, wherein the light-shielding component includes: The first support ring is disposed on the outer periphery of the bottom of the breeding tank; Multiple support rods are spaced apart circumferentially along the first support ring; The second support ring is connected to the end of the support rod away from the first support ring; A light shield covers the gap between adjacent support rods.

[0006] According to the present invention, a water-changing device for freshwater rotifer farming is provided, wherein the support rod is a telescopic structure.

[0007] According to the present invention, a water exchange device for freshwater rotifer farming is provided, wherein the light source component includes: Base; A light source bracket, one side of which is disposed on the base, and the other side of which is disposed above the opening of the breeding tank; The lamp body is connected to the side of the light source bracket away from the base.

[0008] According to the present invention, a water exchange device for freshwater rotifer farming is provided, wherein the light source support includes: A column is disposed on the base; An arm body, one end of which is hinged to the end of the column away from the base, and the other end of which is hinged to the lamp body.

[0009] This utility model provides an auxiliary water exchange device for freshwater rotifer farming. The column is a retractable structure.

[0010] According to the present invention, a water exchange device for freshwater rotifer farming is provided, wherein the separating component includes: The first partition is a ring structure, and the outer ring surface of the first partition abuts against the inner wall surface of the breeding tank. A first lifting rod is disposed on the first partition and is used to move the first partition along the height direction of the breeding tank; The second partition is disposed in the breeding tank, and the outer peripheral surface of the second partition is in contact with the inner ring surface of the first partition; The second lifting rod is installed on the second partition and is used to move the second partition along the height direction of the breeding tank; The separating component includes a first working position and a second working position; In the first working position, the first partition and the second partition are separated; In the second working position, the first partition and the second partition cooperate to divide the space inside the breeding tank into a freshwater rotifer area and a wastewater area.

[0011] According to the freshwater rotifer aquaculture auxiliary water exchange device provided by this utility model, the separation component further includes: Limiting rings are spaced out on the first lifting rod; The second boom passes through the limiting ring, causing the second boom to move along the arrangement direction of the limiting ring.

[0012] According to the freshwater rotifer aquaculture auxiliary water exchange device provided by this utility model, the separation component further includes: A locking buckle is located on the side of the first boom away from the first partition. In the second working position, the locking buckle fixes the second boom to the first boom.

[0013] According to the freshwater rotifer aquaculture auxiliary water exchange device provided by this utility model, the separation component further includes: A sealing strip is circumferentially disposed on the outer ring surface of the first partition and on the mating surface between the second partition and the first partition.

[0014] According to the freshwater rotifer aquaculture auxiliary water exchange device provided by this utility model, it also includes: A drain pipe is installed at the bottom of the breeding tank and communicates with the interior of the breeding tank for discharging the wastewater; A valve is installed at the outlet end of the drain pipe.

[0015] The above-mentioned one or more technical solutions provided by this utility model have at least the following beneficial technical effects: a light-shielding component is set on the outer periphery of the breeding tank to avoid interference from external ambient light, while controlling the internal light field structure; a light source component is set at the opening of the breeding tank to provide an induction light source, causing freshwater rotifers to gather towards the light source side; a separating component is used to separate the freshwater rotifers from the wastewater to achieve "insect-water separation"; and the wastewater is discharged from the drain pipe to achieve auxiliary water exchange. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an auxiliary water exchange device for freshwater rotifer farming provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the limiting ring and locking buckle provided in an embodiment of this utility model.

[0018] Figure label: 1. Breeding tank; 21. First support ring; 22. Support rod; 23. Second support ring; 24. Sunshade; 31. Base; 32. Light source bracket; 321. Column; 322. Arm; 33. Lamp body; 41. First partition; 42. First lifting rod; 43. Second partition; 44. Second lifting rod; 45. Limiting ring; 46. Locking buckle; 5. Drain pipe; 6. Valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Currently, in small and medium-sized high-density aquaculture settings, water exchange is mainly achieved through a fine-mesh filtration system. The system cleans the sieves in a timely manner, filters out wastewater, and replenishes fresh water. During peak periods of high-density aquaculture, the sieves are frequently clogged, and cleaning them is time-consuming and labor-intensive. If not done in time, it can easily cause the filtration system to malfunction, the aquaculture environment to collapse, and the reproduction of freshwater rotifers to be hindered or even result in mass mortality.

[0021] Freshwater rotifers, common microscopic aquatic animals in freshwater, exhibit a strong phototaxis, particularly sensitive to blue light at 450 nm and green light at 520 nm, according to some studies. Healthy, vigorous rotifers will slowly swim and gather towards the area illuminated by this sensitive spectrum, while other metabolic waste and debris in the aquaculture water do not possess this ability and will either remain suspended or sink to the bottom of the container. Currently, there is no device that uses spectral induction to achieve "rotifer-water separation" for wastewater discharge and replenishment. This invention innovatively utilizes spectral induction to separate healthy, vigorous freshwater rotifers from wastewater rich in metabolic waste and debris in the upper and lower spatial areas within the aquaculture container. This invention replaces the sieves of a filtration system with an optical technology and a structurally designed "rotifer-water separation" device, making subsequent wastewater treatment more stable and efficient, and allowing for more timely replenishment of fresh water.

[0022] The following is combined Figures 1-2 This invention describes an auxiliary water exchange device for freshwater rotifer farming according to an embodiment of the present invention.

[0023] like Figure 1As shown in the figure, this utility model embodiment provides a freshwater rotifer aquaculture auxiliary water exchange device, including a culture tank 1, a light-shielding component, a light source component, and a separation component; the culture tank 1 has an open side; the light-shielding component is located on the outer periphery of the culture tank 1 to block external ambient light; the light source component is located corresponding to the open side of the culture tank 1 and is used to induce freshwater rotifers; the separation component is located in the culture tank 1 and is used to separate freshwater rotifers from wastewater; it also includes a drain pipe 5 and a valve 6; the drain pipe 5 is located at the bottom of the culture tank 1 and communicates with the interior of the culture tank 1 for discharging wastewater; the valve 6 is located at the outlet end of the drain pipe 5.

[0024] Specifically, a light-shielding component is installed around the outer perimeter of the breeding tank 1 to avoid interference from external ambient light, while controlling the internal light field structure. A light source component is installed at the opening of the breeding tank 1 to provide an induction light source, causing freshwater rotifers to gather towards the light source. A separation component is used to separate the freshwater rotifers from the wastewater, achieving "insect-water separation". The wastewater is discharged from the drain pipe, thus facilitating water exchange.

[0025] In some possible implementations, the aquaculture tank 1 is made of transparent glass or transparent PVC material.

[0026] In some possible implementations, the bottom of the breeding tank 1 is inverted conical, and the bottom of the tank is suspended and a certain distance from the ground; the drainage pipe 5 is made of PVC pipe, one end of which is glued and fixed to the conical opening at the bottom of the tank, and the other end extends outward.

[0027] In some possible implementations, valve 6 is a cover that is threaded to the port of drain pipe 5, or a ball valve installed on drain pipe 5, and valve 6 is made of PVC.

[0028] According to an embodiment of this utility model, a water-changing auxiliary device for freshwater rotifer farming includes a light-shielding component comprising: a first support ring 21, a plurality of support rods 22, a second support ring 23, and a light-shielding cover 24; the first support ring 21 is disposed on the outer periphery of the bottom of the farming tank 1; the plurality of support rods 22 are spaced apart along the circumference of the first support ring 21; the second support ring 23 is connected to the end of the support rod 22 away from the first support ring 21; and the light-shielding cover 24 covers the gap between adjacent support rods 22, and both sides of the light-shielding cover 24 are detachably connected to the first support ring 21 and the second support ring 23, respectively.

[0029] Understandably, the first support ring 21, multiple support rods 22 and the second support ring 23 are combined to form a column 321 frame structure that surrounds the outside of the breeding tank 1. The light shield 24 is installed on the side of the column 321 frame structure to block the light from the external environment from the breeding tank 1.

[0030] Understandably, the light shield 24 is made of fabric, and a black light-absorbing coating is superimposed on one side of it near the breeding tank 1 to prevent the light emitted by the light source component from being reflected and affecting the induction effect; the light shield can be bonded and fixed to the first support ring 21 and the second support ring 23.

[0031] In some possible implementations, the first support ring 21, the support rod 22, and the second support ring 23 are all made of metal, preferably galvanized aluminum alloy tubing; four support rods 22 are provided, and the four support rods are respectively located at the four equal division positions of the first support ring 21 or the second support ring 23.

[0032] According to an embodiment of this utility model, a water-changing device for freshwater rotifer farming is provided, wherein the support rod 22 is a telescopic structure.

[0033] In some possible implementations, the support rod 22 includes at least two movable rod sections. The outer diameter of the upper rod section is slightly smaller than that of the lower rod section. Both ends of the rod section are provided with spaced adjustment holes. The insertion depth of the upper rod section in the lower rod section can be adjusted according to the adjustment holes. Then, a pin is used to pass through the adjustment holes to fix the overall length of the support rod 22.

[0034] According to an embodiment of the present invention, a water-changing device for freshwater rotifer farming is provided. The light source assembly includes: a base 31, a light source bracket 32, and a lamp body 33. One side of the light source bracket 32 ​​is disposed on the base 31, and the other side of the light source bracket 32 ​​is disposed above the opening of the farming tank 1. The lamp body 33 is connected to the side of the light source bracket 32 ​​away from the base 31.

[0035] In some possible implementations, the base 31 is made of stainless steel or has a galvanized surface; the base 31 and the light source bracket 32 ​​are threaded together; the light source bracket 32 ​​is made of galvanized aluminum alloy tubing; the lamp body 33 includes 10 customized LED beads with a spectral band of 400nm-600nm, which can stably output cold light, and the lamp body 33 is powered by a power cord.

[0036] According to an embodiment of the present invention, a freshwater rotifer aquaculture auxiliary water exchange device is provided, wherein the light source support 32 includes: a column 321 and an arm 322; the column 321 is disposed on the base 31; one end of the arm 322 is hinged to the end of the column 321 away from the base 31, and the other end of the arm 322 is hinged to the lamp body 33.

[0037] According to an embodiment of this utility model, a water-changing device for freshwater rotifer farming is provided, wherein the column 321 is a retractable structure.

[0038] In some possible implementations, the structure of the column 321 is similar to that of the support rod 22, consisting of at least two column sections that are movably connected. The outer diameter of the upper column section is slightly smaller than that of the lower column section, and the length is adjustable using the same adjustment holes and pins. The lamp body 33 also includes a housing, which is hinged to one end of the arm 322 via a hinge ball joint, allowing the illumination angle to be freely adjusted within the lower hemisphere. The other end of the column 321 is hinged to the arm 322 via a hinge shaft, making the angle between the arm 322 and the column 321 adjustable. Both the hinge ball joint and the hinge shaft are made of galvanized aluminum alloy.

[0039] According to an embodiment of the present invention, a water-changing device for freshwater rotifer farming is provided, the partition component includes: a first partition 41, a first hanging rod 42, a second partition 43, and a second hanging rod 44; the first partition 41 has an annular structure, and the outer annular surface of the first partition 41 abuts against the inner wall surface of the farming tank 1; the first hanging rod 42 is disposed on the first partition 41 and is used to move the first partition 41 along the height direction of the farming tank 1; the second partition 43 is disposed in the farming tank 1, and the outer peripheral surface of the second partition 43 cooperates with the inner annular surface of the first partition 41; the second hanging rod 44 is disposed on the second partition 43 and is used to move the second partition 43 along the height direction of the farming tank 1.

[0040] The partition component includes a first working position and a second working position; in the first working position, the first partition 41 and the second partition 43 are separated; in the second working position, the first partition 41 and the second partition 43 cooperate to divide the space inside the breeding tank 1 into a freshwater rotifer area and a wastewater area.

[0041] It is understood that in the embodiments provided by this utility model, by setting an induction light source at the opening on the top of the breeding tank 1, the induction light source attracts freshwater rotifers to the upper layer of water in the breeding tank 1. Then, using a separation component, the upper layer of freshwater rotifers is physically separated from the lower layer of wastewater through the cooperation of the first partition 41 and the second partition 43. There is no need for filter screens or other filter structures, so there is no problem of filter screen clogging. The self-designed device is simple to operate, making wastewater treatment more stable and efficient. Compared with the traditional water exchange mode of existing traditional water pumping and filtration, it eliminates the dependence on frequent cleaning of filter screens and reduces the risk of mechanical damage to freshwater rotifers during water pumping and water exchange.

[0042] It should be understood that the shape of the breeding tank 1 is preferably cylindrical. Therefore, the support ring and light shield 24 in the light-shielding assembly, and the first partition 41 and the second partition 43 in the separating assembly are all adapted to the shape of the breeding tank 1. Among them, the first partition 41 is annular, and the second partition 43 is a disc that matches the inner ring surface of the first partition 41. When the first partition 41 and the second partition 43 move in the height direction of the breeding tank, they can rotate and move up or down at the same time, so as to reduce the resistance during the movement and make it easier to operate.

[0043] In some possible implementations, since the first partition 41 is an annular structure, at least two connection ends of the first hanger 42 to the first partition 41 are provided, symmetrically arranged around the center of the inner ring of the first partition 41. The side of the first hanger 42 away from the connection end is the operating end, which is a straight rod arranged along the height direction of the breeding tank 1. The second hanger 44 is located at the center of the second partition 43, and is also a straight rod arranged along the height direction of the breeding tank 1. Both the first partition 41 and the second partition 43 are made of opaque PVC material, and both the first hanger 42 and the second hanger 44 are made of galvanized aluminum alloy tubing.

[0044] like Figure 2 As shown, a freshwater rotifer aquaculture auxiliary water exchange device provided according to an embodiment of the present invention includes a separating component further comprising a limiting ring 45; the limiting ring 45 is spaced apart on the first hanging rod 42; wherein, the second hanging rod 44 passes through the limiting ring 45, so that the second hanging rod 44 moves along the arrangement direction of the limiting ring 45.

[0045] It is understandable that the arrangement direction of the limiting ring 45 is the height direction of the breeding tank 1. The purpose of setting the limiting ring 45 is to restrict the horizontal displacement direction of the second rod 44, so that it can only move up and down within the limiting ring 45, reduce the adverse effects caused by the swaying of the second rod 44, and make it easier to operate.

[0046] According to an embodiment of the present invention, a freshwater rotifer aquaculture auxiliary water exchange device is provided, the partition component further includes a locking buckle 46; the locking buckle 46 is disposed on the side of the first hanging rod 42 away from the first partition 41; wherein, in the second working position, the locking buckle 46 fixes the second hanging rod 44 to the first hanging rod 42.

[0047] Furthermore, for ease of operation, handles can be provided at the end of the first rod 42 away from the first partition 41 and at the end of the second rod 44 away from the second partition 43.

[0048] In some possible implementations, the locking buckle 46 adopts a U-shaped buckle that can be opened on the side, which can be referred to as the structure of a common padlock; when the second rod 44 moves upward until the second partition 43 and the first partition 41 are engaged, the opening of the locking buckle 46 is turned toward the first rod 42 and the second rod 44 and locked, so as to fix the two and maintain the stability of the current second working position of the partition assembly.

[0049] According to an embodiment of the present invention, a freshwater rotifer aquaculture auxiliary water exchange device is provided, the partition component further includes a sealing strip; the sealing strip is circumferentially disposed on the outer ring surface of the first partition 41 and on the mating surface of the second partition 43 and the first partition 41.

[0050] In some possible implementations, the sealing strip is made of opaque elastic rubber material and is bonded and fixed to the first partition 41 and the second partition 43 to enhance the sealing between the first partition 41 and the breeding tank 1, and between the first partition 41 and the second partition 43. This prevents freshwater rotifers from passing through the gaps between the first partition 41 and the breeding tank 1 and the second partition 43 after the first partition 41 and the second partition 43 are closed, thereby affecting the separation effect.

[0051] Specifically, in a specific embodiment of this utility model, the specific operation process of the device is as follows: Operate the first boom 42 and the second boom 44 to immerse both the first partition 41 and the second partition 43 into the freshwater rotifer breeding tank 1, and adjust the height of the first partition 41 and the second partition 43 in the breeding tank 1 to form the first working position; Assemble the light-shielding components and support the light-shielding cover 24; Adjust the height and position of the light source bracket 32, turn on the lamp body 33 and adjust the light field angle and range; Waiting for the freshwater rotifers to sense spectral stimuli and then swim upwards and gather through the first septum 41; After observing that most of the freshwater rotifers in the breeding tank 1 have gathered in the water layer above the first partition 41, pull the second rod 44 upward to move the second partition 43 upward and cooperate with the first partition 41 to form the second working position. Turn off the light source, remove the light shield 24 and the light source bracket 32, open the valve 6 of the drain pipe 5 to discharge the wastewater in the lower water layer. The discharged wastewater can be further purified and recycled. After the wastewater is drained, valve 6 is closed, the separation component is switched to the first working position, and new water is added to the breeding tank 1 from the top. Remove the first partition 41 and the second partition 43. When the partition reaches the top of the breeding tank 1, the upper surface of the partition can be rinsed with fresh water to flush the small amount of freshwater rotifers attached to it into the breeding tank 1.

[0052] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water exchange device for freshwater rotifer farming, characterized in that, include: A breeding tank (1) with one side open; A light-blocking component is disposed on the outer periphery of the breeding tank (1) to block the external ambient light from the breeding tank (1); The light source assembly is set with the opening corresponding to the breeding tank (1) and is used to induce freshwater rotifers; A separating component is provided in the breeding tank (1) to separate the freshwater rotifers from the wastewater; A drain pipe (5) is installed at the bottom of the breeding tank (1) and communicates with the interior of the breeding tank (1) for discharging the wastewater; A valve (6) is installed at the outlet end of the drain pipe (5).

2. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 1, characterized in that, The light-shielding component includes: The first support ring (21) is disposed on the outer periphery of the bottom of the breeding tank (1); Multiple support rods (22) are arranged at circumferential intervals along the first support ring (21); The second support ring (23) is connected to the end of the support rod (22) away from the first support ring (21); A light shield (24) covers the gap between adjacent support rods (22).

3. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 2, characterized in that, The support rod (22) is a telescopic structure.

4. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 1, characterized in that, The light source assembly includes: Base (31); A light source bracket (32) is provided on one side of the base (31) and on the other side of the light source bracket (32) is provided above the opening of the breeding tank (1); The lamp body (33) is connected to the side of the light source bracket (32) away from the base (31).

5. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 4, characterized in that, The light source support (32) includes: A column (321) is disposed on the base (31); The arm body (322) is hinged at one end to the end of the column (321) away from the base (31), and the other end of the arm body (322) is hinged to the lamp body (33).

6. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 5, characterized in that, The column (321) is a retractable structure.

7. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 1, characterized in that, The separation component includes: The first partition (41) is a ring structure, and the outer ring surface of the first partition (41) abuts against the inner wall surface of the breeding tank (1). The first hanging rod (42) is disposed on the first partition (41) and is used to move the first partition (41) along the height direction of the breeding tank (1); The second partition (43) is disposed in the breeding tank (1), and the outer peripheral surface of the second partition (43) is engaged with the inner ring surface of the first partition (41); The second hanging rod (44) is disposed on the second partition (43) for moving the second partition (43) along the height direction of the breeding tank (1); The separating component includes a first working position and a second working position; In the first working position, the first partition (41) and the second partition (43) are separated; In the second working position, the first partition (41) and the second partition (43) cooperate to divide the space inside the breeding tank (1) into a freshwater rotifer area and a wastewater area.

8. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 7, characterized in that, The separation component also includes: Limiting rings (45) are spaced apart on the first lifting rod (42); The second boom (44) passes through the limiting ring (45), causing the second boom (44) to move along the arrangement direction of the limiting ring (45).

9. The freshwater rotifer aquaculture auxiliary water exchange device according to claim 7, characterized in that, The separation component also includes: A locking buckle (46) is provided on the side of the first rod (42) away from the first partition (41); In the second working position, the locking buckle (46) fixes the second boom (44) to the first boom (42).

10. A freshwater rotifer aquaculture auxiliary water exchange device according to any one of claims 7-9, characterized in that, The separation component also includes: A sealing strip is circumferentially disposed on the outer ring surface of the first partition (41) and on the mating surface between the second partition (43) and the first partition (41).

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