A zooplankton bait separation and purification device and a separation method thereof

Abstract

The application belongs to the technical field of purification devices, and discloses a zooplankton bait separation and purification device and a separation method thereof, which comprises a separation tank, an intermediate cylinder is fixedly connected inside the separation tank, a sealing assembly is arranged inside the intermediate cylinder, and a feeding assembly is arranged above the separation tank. The intermediate cylinder and the sealing assembly are matched, the solution filtered by the computer is stored in the intermediate cylinder when the intermediate cylinder is sealed, and after the intermediate cylinder is opened, the active zooplankton is removed from the intermediate cylinder by using the attractant injected from the outside, and the inactivated zooplankton is retained in the intermediate cylinder. By controlling the sealing and opening of the sealing assembly and the intermediate cylinder, the active zooplankton and the dead zooplankton are separated, the purification treatment of the zooplankton is further completed after the primary filtration, the proportion of the active zooplankton in the separated mixed solution is high, the quality of the zooplankton after the purification as the bait is improved, and the decomposition and pollution of the dead zooplankton are avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of purification devices, and particularly relates to a zooplankton bait separation and purification device and a separation method thereof. BACKGROUND

[0002] The zooplankton bait separation and purification device is mainly used for separating and purifying zooplankton, especially natural bait such as rotifers in aquaculture. Zooplankton is a key bait for feeding aquatic animals such as juvenile fish, juvenile shrimps and juvenile crabs in aquaculture, and usually needs to be separated and purified.

[0003] In the prior art, the zooplankton bait separation and purification device needs to separate and purify the target quality of zooplankton bait from the culture tank after actual cultivation is completed to obtain high-quality bait. However, in the actual separation and purification process, the activity of the living zooplankton bait is affected. Since the zooplankton is exposed to some physical and chemical stress factors (such as centrifugal force, filtration pressure, temperature change, etc.) in the separation and purification process, these factors may affect the survival rate and health status of the zooplankton, reducing the effect of the zooplankton as bait. On the one hand, the proportion of dead zooplankton increases, and on the other hand, there are a large number of dead individuals in the finally separated zooplankton, which cannot be effectively separated, further affecting the bait quality. SUMMARY

[0004] The purpose of the present application is to provide a zooplankton bait separation and purification device and a separation method thereof to solve the problems raised in the background.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: a zooplankton bait separation and purification device and a separation method thereof, comprising a separation tank, an intermediate cylinder fixedly connected inside the separation tank, a sealing assembly provided inside the intermediate cylinder, an upper feeding assembly provided above the separation tank, a primary separation part provided above the upper feeding assembly, a control motor provided at the bottom of the separation tank, the control motor controlling the rotation of the sealing assembly, a side opening provided on the outer side of the intermediate cylinder, and a control liquid injection part communicated at the bottom of the primary separation part,

[0006] A injection assembly is fixedly communicated at the bottom of the upper feeding assembly, the injection assembly comprises an injection pipe, an injection hole and an electromagnetic valve, the injection hole is provided on the outer side of the injection pipe, the injection pipe is communicated with the upper feeding assembly, the injection assembly is located on the outer side of the intermediate cylinder, and the upper feeding assembly stores an attractant.

[0007] Preferably, the feeding assembly comprises a communication ring, a supporting rod, a feeding cylinder and a curved pipe, the supporting rod is fixed on the top of the communication ring, the feeding cylinder is above the side of the communication ring, the curved pipe is fixedly connected between the communication ring and the feeding cylinder, and the feeding cylinder is communicated with the communication ring through the curved pipe.

[0008] Preferably, the injection pipe is fixedly connected at the bottom of the communication ring and communicated with the inside of the communication ring, and the electromagnetic valve is fixedly installed at the top of the injection pipe.

[0009] Preferably, the attractant is composed of one or any of nutrients and chemical attractants.

[0010] Preferably, the sealing assembly comprises a rotating cylinder, an intermediate plate, a rotating shaft and an adaptive port, the intermediate plate is fixedly connected in the rotating cylinder, the rotating cylinder is rotatably sleeved in the inside of the intermediate cylinder, the adaptive port is arranged on the outside of the rotating cylinder, the adaptive port is one-to-one corresponding to the side port, the side port is located on the rotating path of the adaptive port, the rotating shaft is rotatably installed at the bottom of the separation tank, the upper end of the rotating shaft is fixedly connected with the intermediate plate, and the lower end of the rotating shaft is fixedly connected with the output shaft of the control motor.

[0011] Preferably, the primary separation part comprises a top tank, a filter screen one and a filter screen two, the filter screen one and the filter screen two are fixedly connected in the inside of the top tank from bottom to top, and the top tank is fixedly connected at the top of the supporting rod.

[0012] Preferably, the control injection part comprises a bottom pipe and a switch valve, the bottom pipe is fixedly connected at the bottom of the top tank and communicated with the inside of the top tank, and the switch valve is fixedly arranged at the bottom of the bottom pipe and controls the opening and closing of the lower end of the bottom pipe.

[0013] Preferably, the inside of the separation tank is fixedly connected with isolation rings, the isolation rings are distributed in the separation tank at equal intervals, the top of the isolation ring is provided with a sleeve hole, the sleeve hole is sleeved with the injection pipe, and the isolation rings are alternately distributed with the injection holes.

[0014] Preferably, the outside of the separation tank is fixedly embedded with a temperature sensor extending into the inside of the separation tank, the bottom of the separation tank is respectively provided with a first hole and a second hole, the first hole and the second hole are respectively located on the inside and outside of the intermediate cylinder, and the bottom of the first hole and the second hole is respectively provided with a sealing plug.

[0015] A separation method of a zooplankton bait separation and purification device comprises the following operation steps:

[0016] The first step is that the mixed liquid with plankton is poured into the primary separation part at a low speed, and larger particles and impurities are filtered above the filter screen two, and the filter screen one further filters smaller particles and impurities, and the filtered micro plankton is concentrated in the liquid above and below the filter screen one in a static state;

[0017] The second step is that the switch valve in the control liquid injection part is started, intermittent control is opened, when the switch valve is opened, the primary filtered mixed liquid falls into the separation box and is injected into the inside of the intermediate cylinder, after the injection is completed, the injection assembly at the bottom of the feeding assembly is started, the electromagnetic valve in the injection assembly is opened, the attractant stored in the feeding assembly is input into the injection pipe and is injected into the solution in the separation box along the injection hole;

[0018] The third step is that the solution containing plankton in the intermediate cylinder is injected, the active plankton moves towards the attractant, passes through the side opening and is gathered near the injection hole, after the attraction for a period of time, the control motor is started to drive the sealing assembly to rotate, the rotating cylinder rotates to seal the side opening, and the control liquid injection part is started to inject the solution after the plankton is filtered in the next round;

[0019] The fourth step is that the rotating cylinder is rotated again after the injection is static, the side opening is opened, the active plankton in the rotating cylinder moves outwards again, and the broken, dead and inactivated plankton is retained in the intermediate cylinder;

[0020] The fifth step is that the first hole and the second hole are opened to realize the output of the separated solution, and the mixed solution of the purified active plankton and the mixed solution of the dead and inactivated plankton are obtained.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The present application realizes the primary filtration of larger impurity particles by using the filter screen one and the filter screen two arranged in the primary separation part and cooperating with the slow input of the mixed liquid, and realizes the downward injection of the filtered liquid in the primary separation part by using the control liquid injection part at the bottom of the primary separation part, intermittent starting and quantitative downward injection of a certain liquid, and using the downward gravity flow sinking of the liquid in the top box to push the liquid to filter through the filter screen one and the filter screen two when the liquid is downward injected, so that the death of the plankton caused by extrusion when the liquid continuously flows and impacts the filter screen is avoided, the activity of the plankton during the filtration is greatly affected by the intermittent self-weight guided filtration, the protective separation and purification is realized, the survival rate of the plankton bait in the separation process is improved, and the quality of the bait finally separated is improved.

[0023] 2、The present application realizes the quantitative and directional introduction of zooplankton attractant by using the injection assembly, cooperates with the intermediate cylinder and the sealing assembly, stores the solution filtered by the computer in the primary stage when the intermediate cylinder is sealed, and after opening, uses the outside directional injection of the attractant to attract the active zooplankton to move out of the intermediate cylinder, and retains the inactivated zooplankton in the intermediate cylinder, uses the sealing and opening control of the sealing assembly and the intermediate cylinder to separate the active zooplankton and the dead zooplankton, after the primary filtration, further completes the purification treatment of the zooplankton, ensures the high proportion of the active zooplankton in the separated mixed liquid, improves the quality of the zooplankton as bait after purification, and avoids the decomposition and pollution of the dead zooplankton.

[0024] 3、The present application uses the multiple sets of isolation rings in the separation box, cooperates with the alternate distribution of the isolation ring and the injection hole, separates the separation box into different intervals, cooperates with the injection of the attractant in the injection hole in different intervals, strengthens the attraction of the suspended zooplankton in different depths, further expands the purification effect, and ensures the effective separation and purification of the zooplankton in different depths in the liquid. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structural schematic diagram of the present application;

[0026] Figure 2 It is the sectional view schematic diagram of the present application;

[0027] Figure 3 It is the sectional view schematic diagram of the primary separation part and the control injection part of the present application;

[0028] Figure 4 It is the schematic diagram of the loading assembly and the injection assembly of the present application;

[0029] Figure 5 It is the explosion schematic diagram of the injection assembly of the present application;

[0030] Figure 6 It is the sleeve connection schematic diagram of the intermediate cylinder and the sealing assembly of the present application;

[0031] Figure 7 It is the schematic diagram of the sealing assembly of the present application;

[0032] Figure 8 It is the sectional view schematic diagram of the separation box of the present application.

[0033] As shown in the figure: 1, separation tank; 2, intermediate cylinder; 3, sealing assembly; 31, rotating cylinder; 32, intermediate plate; 33, rotating shaft; 34, adapter port; 4, control motor; 5, temperature sensor; 6, feeding assembly; 61, communication ring; 62, support rod; 63, feeding cylinder; 64, elbow; 7, primary separation part; 71, top tank; 72, filter screen one; 73, filter screen two; 8, injection assembly; 81, injection pipe; 82, injection hole; 83, electromagnetic valve; 9, control injection part; 91, bottom pipe; 92, on-off valve; 10, side port; 11, isolation ring; 12, sleeve hole; 13, No. 1 hole; 14, No. 2 hole. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0035] As Figures 1 to 8 shown, the embodiment of the present application provides a zooplankton bait separation and purification device and a separation method thereof, which comprises a separation tank 1, the inside of the separation tank 1 is fixedly connected with an intermediate cylinder 2, the inside of the intermediate cylinder 2 is provided with a sealing assembly 3, the upper part of the separation tank 1 is provided with a feeding assembly 6, the upper part of the feeding assembly 6 is provided with a primary separation part 7, the bottom of the separation tank 1 is provided with a control motor 4, the control motor 4 controls the rotation of the sealing assembly 3, the outer side of the intermediate cylinder 2 is provided with a side port 10, the bottom of the primary separation part 7 is provided with a control injection part 9, the bottom of the feeding assembly 6 is fixedly connected with an injection assembly 8, the injection assembly 8 comprises an injection pipe 81, an injection hole 82 and an electromagnetic valve 83, the injection hole 82 is arranged on the outer side of the injection pipe 81, the injection pipe 81 is in communication with the feeding assembly 6, the injection assembly 8 is arranged on the outer side of the intermediate cylinder 2, and the feeding assembly 6 stores an attractant.

[0036] The embodiment is as follows: the mixed liquid with plankton to be separated is poured into the primary separation part 7 at a low speed, and larger particles and impurities are filtered above the filter screen two 73, and the filter screen one 72 further filters smaller particles and impurities, and the filtered micro plankton in a stationary state is concentrated in the liquid above and below the filter screen one 72, the switch valve 92 in the control liquid injection part 9 is opened, and the opening is intermittently controlled, when the opening is opened, the mixed liquid filtered in the primary stage is caused to fall into the separation tank 1 and is injected into the inside of the intermediate cylinder 2, after the injection is completed, the injection assembly 8 at the bottom of the feeding assembly 6 is started, the electromagnetic valve 83 in the injection assembly 8 is opened, the attractant stored in the feeding assembly 6 is input into the injection pipe 81 and is injected into the solution in the separation tank 1 along the injection hole 82; the solution containing plankton injected in the intermediate cylinder 2, the active plankton moves towards the attractant and passes through the side port 10 and is gathered near the injection hole 82, after the attraction for a period of time, the control motor 4 is started to drive the sealing assembly 3 to rotate, the rotating cylinder 31 rotates to seal the side port 10, and the control liquid injection part 9 is started to inject the solution after the plankton is filtered in the next round; after the injection is stationary, the rotating cylinder 31 is rotated again to open the side port 10, the active plankton in the rotating cylinder 31 moves outwards again, the plankton that is broken, dead and loses activity is retained in the intermediate cylinder 2, the first hole 13 and the second hole 14 are opened to realize the output of the solution after the separation, and the mixed solution of the active plankton after the purification and the mixed solution of the plankton that is dead and loses activity are obtained.

[0037] Firstly, by using the filter screen one 72 and the filter screen two 73 arranged in the primary separation part 7, the mixed liquid is slowly input, the primary filtration of larger impurity particles is realized, and the control liquid injection part 9 at the bottom of the primary separation part 7 is intermittently started and a certain amount of liquid is quantitatively injected downward, the downward injection of the filtered liquid in the primary separation part 7 is realized, the liquid is pushed to filter with the filter screen one 72 and the filter screen two 73 by the downward gravity flow sinking of the liquid in the top tank 71 during the downward injection, the impact of the continuously flowing liquid on the filter screen is avoided to cause the extrusion death of the plankton passing through, the self-weight guided filtration in the buffer mode greatly reduces the influence on the activity of the plankton during the filtration, the protective separation and purification are realized, the survival rate of the plankton bait in the separation process is improved, and the quality of the bait finally separated is improved.

[0038] In addition, by using the injection assembly 8 to realize the quantitative and directional introduction of the zooplankton attractant, cooperating with the cooperation of the intermediate cylinder 2 and the sealing assembly 3, the solution after the primary filtration is stored in the intermediate cylinder when the intermediate cylinder is sealed, and after being opened, the active zooplankton is attracted out of the intermediate cylinder 2 by using the externally directed injection of the attractant, and the inactivated zooplankton is retained in the intermediate cylinder 2, the active zooplankton and the dead zooplankton are separated by using the sealing and opening control of the sealing assembly 3 and the intermediate cylinder 2, and after the primary filtration, the purification treatment of the zooplankton is further completed, so that the proportion of the active zooplankton in the separated mixed solution is high, the quality of the zooplankton after purification as bait is improved, and the decomposition and pollution of the dead zooplankton are avoided.

[0039] On the other hand, by using a plurality of isolation rings 11 in the separation tank 1, cooperating with the alternating distribution of the isolation ring 11 and the injection hole 82, the inside of the separation tank 1 is divided into different intervals in the upper and lower directions, and by injecting the attractant into the injection hole in different intervals, the attraction of the suspended zooplankton in different depths can be enhanced, and the purification effect is further improved, so that the zooplankton in different depths of the liquid can be effectively separated and purified.

[0040] The feeding assembly 6 includes a communication ring 61, a support rod 62, a feeding cylinder 63, and an elbow pipe 64. The support rod 62 is fixed at the top of the communication ring 61, the feeding cylinder 63 is located above the side of the communication ring 61, and the elbow pipe 64 is fixedly connected between the communication ring 61 and the feeding cylinder 63. The feeding cylinder 63 is in communication with the communication ring 61 through the elbow pipe 64. The injection pipe 81 is fixedly connected to the bottom of the communication ring 61 and communicates with the inside of the communication ring 61. The electromagnetic valve 83 is fixedly installed at the top of the injection pipe 81.

[0041] The feeding assembly 6 stores the attractant by injecting the attractant into the feeding cylinder 63, and when the electromagnetic valve 83 is opened, the injection pipe 81 is in communication with the communication ring 61 to release the attractant, and the bottom of the injection pipe 81 is closed.

[0042] The attractant is composed of one or any of the nutritional substances and the chemical attractant.

[0043] The attractant is used to attract the zooplankton to move in a specified direction.

[0044] The sealing assembly 3 includes a rotating cylinder 31, an intermediate plate 32, a rotating shaft 33, and an adapter port 34. The intermediate plate 32 is fixedly connected in the rotating cylinder 31, the rotating cylinder 31 is rotatably sleeved in the inside of the intermediate cylinder 2, the adapter port 34 is opened on the outside of the rotating cylinder 31, the adapter port 34 corresponds to the side port 10 one by one, the side port 10 is located on the rotating path of the adapter port 34, the rotating shaft 33 is rotatably installed at the bottom of the separation tank 1, the upper end of the rotating shaft 33 is fixedly connected with the intermediate plate 32, and the lower end of the rotating shaft 33 is fixedly connected with the output shaft of the control motor 4.

[0045] The sealing assembly realizes the sealing control of the side opening 10, ensures the active zooplankton to move out actively when the opening, and avoids the diffusion of the inactivated zooplankton to the whole separation tank 1 when the injection of the mixed solution of the un-purified zooplankton.

[0046] The primary separation part 7 includes a top tank 71, a filter screen one 72 and a filter screen two 73, the filter screen one 72 and the filter screen two 73 are fixedly connected to the inside of the top tank 71 from bottom to top, the top tank 71 is fixedly connected to the top of the support rod 62, the control injection part 9 includes a bottom pipe 91 and a switch valve 92, the bottom pipe 91 is fixedly connected to the bottom of the top tank 71 and communicates with the inside of the top tank 71, the switch valve 92 is fixedly arranged at the bottom of the bottom pipe 91 and controls the opening and closing of the lower end of the bottom pipe 91.

[0047] By using the primary separation part 7 and the control injection part 9, the quantitative liquid discharge is realized, the active sinking of the liquid in the primary separation part 7 under the intermittent liquid discharge is realized, the relatively stable filtration is realized, and the damage of the water flow impact to the zooplankton is avoided.

[0048] The inside of the separation tank 1 is fixedly connected with the isolation rings 11, the isolation rings 11 are distributed in the separation tank 1 at equal intervals, the top of the isolation ring 11 is provided with a sleeve hole 12, the sleeve hole 12 is sleeved with the injection pipe 81, and the isolation rings 11 are alternately distributed with the injection holes 82.

[0049] By using the isolation rings 11, the layered treatment of the injected attractant is realized, the zooplankton at different depths is ensured to be moved out of the middle cylinder 2, and the more comprehensive active separation and purification is completed.

[0050] The outside of the separation tank 1 is fixedly embedded with the temperature sensor 5 extending to the inside of the separation tank 1, the bottom of the separation tank 1 is respectively provided with a first hole 13 and a second hole 14, the first hole 13 and the second hole 14 are respectively located on the inner and outer sides of the middle cylinder 2, and the bottom of each of the first hole 13 and the second hole 14 is provided with a sealing plug.

[0051] By using the temperature sensor 5 to sense the temperature change, the appropriate temperature for separation and purification is ensured, and the separation of the active zooplankton solution and the separation of the dead zooplankton after the purification of the first hole 13 and the second hole 14 is completed.

[0052] A separation method of a zooplankton bait separation and purification device includes the following operation steps:

[0053] The first step: pour the liquid mixed with the zooplankton to be separated into the primary separation part 7 at a low speed, the larger particles and impurities are filtered above the filter screen two 73, and the filter screen one 72 further filters the smaller particles and impurities, and the filtered micro zooplankton is concentrated in the liquid above and below the filter screen one 72 in the stationary state;

[0054] Second step: open the switch valve 92 in the control injection part 9, intermittent control open, open, so that the primary filtered mixed liquid falls into the separation tank 1, and is injected into the inside of the intermediate cylinder 2, after the injection is completed, the injection assembly 8 at the bottom of the feeding assembly 6 is started, the electromagnetic valve 83 in the injection assembly 8 is opened, the attractant stored in the feeding assembly 6 is input into the injection pipe 81, and is injected into the solution in the separation tank 1 along the injection hole 82;

[0055] Third step: the solution containing zooplankton in the intermediate cylinder 2 is injected, the active zooplankton moves towards the attractant, passes through the side port 10 and gathers near the injection hole 82, after the attraction for a period of time, the control motor 4 is started to drive the sealing assembly 3 to rotate, the rotating cylinder 31 rotates to seal the side port 10, and the control injection part 9 is started to inject the solution after the zooplankton is filtered out in the next round;

[0056] Fourth step: the rotating cylinder 31 is rotated again after the injection is static, the side port 10 is opened, the active zooplankton in the rotating cylinder 31 moves outwards again, and the broken and dead zooplankton loses activity and remains in the intermediate cylinder 2;

[0057] Fifth step: the first hole 13 and the second hole 14 are opened to realize the output of the separated solution, and the mixed solution of the purified active zooplankton and the mixed solution of the dead and inactive zooplankton are obtained.

[0058] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A zooplankton feed separation and purification device, comprising a separation chamber (1), characterized in that: The separation box (1) is fixedly connected to an intermediate cylinder (2), and the intermediate cylinder (2) is provided with a sealing assembly (3). The separation box (1) is provided with a feeding assembly (6) above it, and a primary separation section (7) is provided above the feeding assembly (6). The separation box (1) is provided with a control motor (4) at the bottom, and the control motor (4) controls the sealing assembly (3) to rotate. The outer side of the intermediate cylinder (2) is provided with a side opening (10), and the bottom of the primary separation section (7) is connected to a control injection section (9). The bottom of the feeding assembly (6) is fixedly connected to the injection assembly (8). The injection assembly (8) includes an injection tube (81), an injection hole (82), and a solenoid valve (83). The injection hole (82) is opened on the outside of the injection tube (81). The injection tube (81) is connected to the feeding assembly (6). The injection assembly (8) is located on the outside of the intermediate cylinder (2). The feeding assembly (6) stores an aspirant. The feeding assembly (6) includes a connecting ring (61), a support rod (62), a feeding cylinder (63), and a curved tube (64). The support rod (62) is fixed on the top of the connecting ring (61). The feeding cylinder (63) is located above the side of the connecting ring (61). The curved tube (64) is fixedly connected between the connecting ring (61) and the feeding cylinder (63). The feeding cylinder (63) is connected to the connecting ring (61) through the curved tube (64). The injection tube (81) is fixedly connected to the bottom of the connecting ring (61) and communicates with the inside of the connecting ring (61). The solenoid valve (83) is fixedly installed on the top of the injection tube (81). The attractant is composed of nutrients and chemical attractants. The sealing assembly (3) includes a rotating cylinder (31), an intermediate plate (32), a rotating shaft (33), and an adapter port (34). The intermediate plate (32) is fixedly connected in the rotating cylinder (31). The rotating cylinder (31) is rotatably sleeved inside the intermediate cylinder (2). The adapter port (34) is opened on the outer side of the rotating cylinder (31). The adapter port (34) corresponds one-to-one with the side port (10). The side port (10) is located on the rotation path of the adapter port (34). The rotating shaft (33) is rotatably installed at the bottom of the separation box (1). The upper end of the rotating shaft (33) is fixedly connected to the intermediate plate (32). The lower end of the rotating shaft (33) is fixedly connected to the output shaft of the control motor (4).

2. The zooplankton feed separation and purification device according to claim 1, characterized in that: The primary separation section (7) includes a top box (71), a first filter screen (72) and a second filter screen (73). The first filter screen (72) and the second filter screen (73) are fixedly connected to the inside of the top box (71) from bottom to top. The top box (71) is fixedly connected to the top of the support rod (62).

3. The zooplankton feed separation and purification device according to claim 2, characterized in that: The control injection unit (9) includes a bottom tube (91) and a switch valve (92). The bottom tube (91) is fixedly connected to the bottom of the top box (71) and communicates with the inside of the top box (71). The switch valve (92) is fixedly installed at the bottom of the bottom tube (91) and controls the opening and closing of the lower end of the bottom tube (91).

4. The zooplankton feed separation and purification device according to claim 3, characterized in that: An isolation ring (11) is fixedly connected inside the separation box (1). The isolation rings (11) are evenly distributed in the separation box (1). A sleeve hole (12) is opened on the top of the isolation ring (11). The sleeve hole (12) is sleeved with the injection pipe (81). The isolation ring (11) and the injection hole (82) are alternately distributed.

5. The zooplankton feed separation and purification device according to claim 4, characterized in that: A temperature sensor (5) extending into the interior of the separation box (1) is fixedly nested on the outer side of the separation box (1). A first hole (13) and a second hole (14) are respectively opened at the bottom of the separation box (1). The first hole (13) and the second hole (14) are located on the inner and outer sides of the intermediate cylinder (2) respectively. A sealing plug is provided at the bottom of the first hole (13) and the second hole (14).

6. The separation method of the zooplankton feed separation and purification device according to claim 5, characterized in that: The following steps are included: Step 1: Pour the liquid containing zooplankton into the primary separation section (7) at a low speed. Larger particles and impurities are filtered above the second filter screen (73), and the first filter screen (72) further filters smaller particles and impurities. The filtered micro zooplankton are concentrated in the liquid above and below the first filter screen (72) when the filter is left to stand. Step 2: Open the switch valve (92) in the control injection section (9) and open it intermittently. When it is open, the mixed liquid from the primary filtration falls into the separation tank (1) and is injected into the interior of the intermediate cylinder (2). After the injection is completed, start the injection component (8) at the bottom of the feeding component (6). The solenoid valve (83) in the injection component (8) opens, and the attractant stored in the feeding component (6) is input into the injection pipe (81) and injected into the solution in the separation tank (1) along the injection hole (82). Step 3: In the solution containing zooplankton injected in the intermediate cylinder (2), the active zooplankton move towards the attractant and pass through the side opening (10) and gather near the injection hole (82). After attracting for a period of time, the control motor (4) is started, which drives the sealing assembly (3) to rotate. The rotating cylinder (31) rotates to seal the side opening (10), and the control injection section (9) is started to inject the next round of zooplankton-filtered solution. Step 4: After injection and settling, rotate the rotating cylinder (31) again, open the side opening (10), and the active zooplankton in the rotating cylinder (31) will move out again, while the broken, dead, and inactive zooplankton will remain in the middle cylinder (2). Step 5: Open the first hole (13) and the second hole (14) to export the separated solution and obtain the purified active zooplankton mixed solution and the dead and inactive zooplankton mixed solution.

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