A fish seedling cultivation device convenient for water changing and cleaning

Abstract

The present invention discloses a fish seedling cultivation device which is convenient for water changing and cleaning in the technical field of fish seedling cultivation, comprising: a driving mechanism, which is arranged at the bottom of the outer box component; a cleaning mechanism, which is arranged in the inner cavity of the inner box component and connected to the driving mechanism, the cleaning mechanism is in contact with the filter screen, and the driving mechanism drives the cleaning mechanism to rotate to clean the inner cavity of the inner box component and the filter screen. The fish seedling cultivation device which is convenient for water changing and cleaning can change water and clean the inside of the inner box component by driving the cleaning mechanism to rotate, and can perform water changing and cleaning during fish seedling cultivation and breeding, without the need to transfer the fish seedlings, thereby reducing the labor intensity of the breeding personnel and conveniently and quickly performing water changing and cleaning, thereby improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of fish seedling cultivation, in particular to a fish seedling cultivation device which is convenient for water changing and cleaning. Background Art

[0002] Fish seedling cultivation refers to the process of cultivating fish fry into edible fish or fish for release. This process can be roughly divided into two methods: static water cultivation and flowing water cultivation. Static water cultivation is mainly suitable for carp fish. Through the static water cultivation method in ponds, juvenile fish (summer flowers) with a body length of about 3 cm are cultivated into fish species. Flowing water cultivation is suitable for some specific fish, and the growth of fish is promoted by the flowing water environment.

[0003] The existing fish seedling cultivation mainly involves placing the fish seedlings in a breeding barrel and feeding them feed at regular intervals. The fish seedlings grow in the breeding barrel, and it is very easy for dirt to form in the breeding barrel. Therefore, the breeding barrel needs to be cleaned and replaced with water from time to time. When changing the water and cleaning, the fish seedlings need to be taken out of the water and placed in a temporary container, and then the inside of the breeding barrel needs to be drained and cleaned. After the cleaning is completed, clean water is injected into the breeding barrel, and then the fish seedlings are placed in the breeding barrel. The process is cumbersome and the work efficiency is low. Therefore, how to conveniently and quickly change the water and clean and improve work efficiency is a problem that needs to be urgently solved by technicians in this technical field. Summary of the invention

[0004] The object of the present invention is to provide a fish fry breeding device which is convenient for water changing and cleaning, so as to solve the problem raised in the above-mentioned background technology that since the fish fry are cultured in a breeding barrel and feed and the like are put in, it is very easy to form dirt in the breeding barrel. Therefore, the breeding barrel needs to be frequently changed and cleaned. When changing and cleaning the water, the fish fry need to be fished out of the water and placed in a temporary container, and then the inside of the breeding barrel needs to be drained and cleaned. After the cleaning is completed, clean water is injected into the breeding barrel, and then the fish fry are put into the breeding barrel. The process is cumbersome and the work efficiency is low.

[0005] To achieve the above object, the present invention provides the following technical solution: a fish seedling cultivation device that is convenient for water change and cleaning, comprising:

[0006] An outer box assembly, wherein the outer box assembly is placed on the ground;

[0007] An inner box assembly, the inner box assembly being arranged in the inner cavity of the outer box assembly for cultivating fry;

[0008] A filter screen is arranged in the inner cavity of the inner box assembly to divide the inner cavity of the inner box assembly into two parts, an upper part and an lower part, and the fry are cultivated in the upper part of the inner cavity of the inner box assembly;

[0009] A driving mechanism, wherein the driving mechanism is arranged at the bottom of the outer box assembly;

[0010] A cleaning mechanism, the cleaning mechanism is arranged in the inner cavity of the inner box assembly and connected to the driving mechanism, the cleaning mechanism is in contact with the filter screen, and the driving mechanism drives the cleaning mechanism to rotate to clean the inner cavity of the inner box assembly and the filter screen;

[0011] A control system is arranged outside the outer box assembly.

[0012] Preferably, the outer box assembly comprises:

[0013] An outer box, wherein a mounting groove is provided on a circumferential side wall of an inner cavity of the outer box, and an air knife is installed in the inner cavity of the mounting groove;

[0014] A fixing ring is arranged at the upper end of the outer box to fix the wind knife.

[0015] Preferably, the inner box assembly comprises:

[0016] The inner box comprises an upper box body, a lower box body and a sewage outlet, the lower box body is arranged at the lower end of the upper box body, the sewage outlet is arranged at the lower end of the lower box body, and an air groove is opened on the circumferential outer wall of the upper box body, the air groove corresponds to the air knife, and the wind blown by the air knife enters the inner cavity of the upper box body through the air groove to clean the circumferential side wall of the inner cavity of the upper box body;

[0017] A sealing plate is movably mounted in the inner cavity of the air slot to intermittently seal the air slot.

[0018] Preferably, the driving mechanism comprises:

[0019] A bellows, wherein a first top cover is disposed on the top of the bellows, an air inlet and a first exhaust port are disposed on the circumferential outer wall of the bellows, a high-pressure blower is disposed at the end of the air inlet to deliver high-pressure airflow to the inner cavity of the bellows, and a first drain port is disposed at the bottom of the bellows;

[0020] A driving shaft, the driving shaft is arranged in the inner cavity of the bellows and passes through the top of the first top cover and is inserted into the inner cavity of the outer box assembly, a driving blade is arranged on the circumferential outer wall of the driving shaft, the driving blade is arranged in the inner cavity of the bellows corresponding to the air inlet, and the driving blade is driven to rotate by the high-pressure airflow;

[0021] A water conduit, one end of which is connected to the first drain outlet.

[0022] Preferably, the cleaning mechanism comprises:

[0023] Rotating shaft;

[0024] A spiral blade, wherein the spiral blade is arranged on the circumferential outer side wall of the rotating shaft;

[0025] A scraper rod is arranged on the circumferential outer side wall of the rotating shaft and on the upper end of the spiral blade.

[0026] Preferably, a separation mechanism is provided at the lower end of the cleaning mechanism, and the separation mechanism is provided in the inner cavity of the outer box assembly. The separation mechanism is intermittently connected with the inner cavity of the inner box assembly through the cleaning mechanism to perform solid-liquid separation on the dirt discharged by the cleaning mechanism. The separation mechanism comprises:

[0027] Liquid collecting cylinder;

[0028] A screen, wherein the screen is arranged in the inner cavity of the liquid collecting cylinder, a transmission shaft is arranged in the inner cavity of the screen, and the transmission shaft penetrates the liquid collecting cylinder and is connected with the rotating shaft;

[0029] A sewage discharge pipe is arranged in the inner cavity of the screen, and the ends of the sewage discharge pipe respectively penetrate the liquid collecting cylinder and the outer box assembly and are connected to the sewage pump, so that the solid dirt in the inner cavity of the screen is discharged by the suction of the sewage pump, and a sewage suction port is opened on the circumferential outer wall of one end of the inner cavity of the screen on the sewage discharge pipe, and the sewage suction port is close to the circumferential side wall of the inner cavity of the screen, so as to clean the dirt on the circumferential side wall of the inner cavity of the screen.

[0030] Preferably, the inner cavity of the outer box assembly is provided with an energy storage mechanism, which is respectively connected to the driving mechanism and the wind knife to provide kinetic energy of the wind knife, and the energy storage mechanism includes:

[0031] Energy storage tank;

[0032] A second top cover, wherein the second top cover is arranged on the top of the energy storage box, a second exhaust port and a third exhaust port are arranged on the top of the second top cover, and the second exhaust port is connected to the air knife through a pipeline;

[0033] An air intake pipe, the air intake pipe is arranged at the bottom of the energy storage box;

[0034] A heat exchange mechanism, wherein the heat exchange mechanism is arranged in the inner cavity of the energy storage box, and two ends of the heat exchange mechanism respectively penetrate the bottom of the energy storage box and the top of the second top cover;

[0035] An exhaust duct is connected to the third exhaust port.

[0036] Preferably, a lifting mechanism is provided on the outer side of the outer box assembly, and the lifting mechanism is connected to the energy storage mechanism and the filter screen respectively, and the energy storage mechanism provides kinetic energy to drive the lifting mechanism to drive the filter screen to rise and fall, and the lifting mechanism includes:

[0037] A mounting cylinder, wherein a mounting plate is disposed on an outer circumferential wall of the mounting cylinder, a third top cover is disposed on the top of the mounting cylinder, and a bottom of the mounting cylinder is connected to the exhaust pipe;

[0038] A telescopic rod, one end of which is arranged in the inner cavity of the mounting tube, the other end of which is connected to the filter screen, a piston is arranged on one end of the telescopic rod which is arranged in the inner cavity of the mounting tube, and the circumferential outer side wall of the piston contacts the circumferential side wall of the inner cavity of the mounting tube.

[0039] Preferably, the control system comprises:

[0040] A collection module, the collection module is used to collect water flow velocity data and water temperature data;

[0041] A storage module, wherein the storage module is used to set comparison data;

[0042] A processing module, the processing module is electrically connected to the acquisition module and the storage module respectively, and is used to compare the collected data with the comparison data and output the comparison result;

[0043] A control module is electrically connected to the processing module and is used to output different control signals according to the comparison result.

[0044] Preferably, the control system includes the following specific operating steps:

[0045] S1: Collect water flow velocity and water temperature data through the acquisition module, and output the collected data to the processing module;

[0046] S2: The processing module extracts the comparison data stored in the storage module, compares the comparison data with the collected data and outputs the comparison result;

[0047] S3: The comparison result is transmitted to the control module through the processing module, and the control module outputs different control signals according to the comparison result.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] (1) The driving mechanism drives the cleaning mechanism to rotate and clean the inside of the inner box assembly to change the water. The water can be changed and cleaned during the breeding and cultivation of fry. There is no need to transfer the fry, which reduces the labor intensity of the breeding personnel and can conveniently and quickly change the water and clean, thereby improving work efficiency;

[0050] (2) The rotation of the scraper can drive the flow of aquaculture water. The water flow can keep the fry active, increase their exercise, promote the metabolism of the fry, help the fry grow healthily, and enhance their physical fitness. The flow of water can also help oxygen dissolve better in the water, increase the amount of dissolved oxygen in the water, and sufficient oxygen supply can promote the growth and development of the fry;

[0051] (3) The high-intensity airflow generated by the air knife is used to clean the dirt adhering to the circumferential side wall of the inner cavity of the upper box, which can further ensure the cleanliness of the breeding water and ensure the normal growth needs of the fry;

[0052] (4) When the air pressure in the inner cavity of the energy storage box reaches a certain level, the solenoid valve opens, and the air pressure is transported to the air knife through the pipeline. The air knife sprays out the dirt adhering to the circumferential side wall of the inner cavity of the upper box body. When the pressure in the inner cavity of the energy storage box drops to a certain level, the solenoid valve is closed and energy storage continues. The dirt adhering to the circumferential side wall of the inner cavity of the upper box body can be cleaned regularly to ensure water quality. At the same time, the high-pressure airflow is sprayed onto the aquaculture water to drive the flow of water and further increase the dissolved oxygen content in the water.

[0053] (5) The dirt is discharged into the inner cavity of the screen through the spiral blades. The screen rotates under the drive of the drive shaft to generate centrifugal force. The centrifugal force generated by the rotation of the screen is used to throw out the water in the dirt. The water in the dirt passes through the screen and is thrown onto the circumferential side wall of the inner cavity of the liquid collecting cylinder. Then, under the action of gravity, the water flows into the inner cavity of the bellows. The dirt with water removed remains in the inner cavity of the screen, which can separate the water in the dirt into solid and liquid.

[0054] (6) The sewage pump generates suction on the inner cavity of the sewage pipe, and the sewage remaining at the bottom of the inner cavity of the screen and the circumferential side wall of the inner cavity are cleaned through the sewage pipe and the sewage suction port, and the sewage remaining is pumped out of the inner cavity of the screen to avoid the residual sewage clogging the screen, thereby ensuring the normal use of the screen;

[0055] (7) The water entering the inner cavity of the water pipe is pumped to the inner cavity of the water inlet through the water pump and enters the inner cavity of the coil through the water inlet. The air is compressed in the inner cavity of the energy storage box. The air compression generates heat. The water enters the inner cavity of the coil and exchanges heat with the heat generated when the air is compressed in the inner cavity of the energy storage box, thereby heating the water in the inner cavity of the coil. The purpose of adjusting the water temperature is achieved by adjusting the water flow rate in the inner cavity of the coil. The faster the flow rate, the lower the water temperature, and the slower the flow rate, the higher the water temperature. The water temperature in the inner cavity of the coil is adjusted according to the water temperature in the inner cavity of the inner box, so that the water temperature in the inner cavity of the inner box is maintained between 20-30°C.

[0056] (8) The water after heat exchange flows back to the inner cavity of the upper box through the second drain port, so that the decontaminated water can be recycled, saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a partial cross-sectional schematic diagram of the present invention;

[0058] Figure 2 It is a partial cross-sectional schematic diagram of the outer box assembly of the present invention;

[0059] Figure 3 It is a cross-sectional schematic diagram of the inner box of the present invention;

[0060] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point A in the middle;

[0061] Figure 5 This is a schematic diagram of the sealing plate structure of the present invention;

[0062] Figure 6 It is a schematic diagram of the structure of the driving mechanism of the present invention;

[0063] Figure 7 This is a schematic diagram of the drive shaft structure of the present invention;

[0064] Figure 8 It is a partial cross-sectional view of the separation mechanism of the present invention and a schematic diagram of the installation of the cleaning machine and the separation mechanism;

[0065] Fig. 9 This is a schematic diagram of the sewage pipe structure of the present invention;

[0066] Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of point B in the middle;

[0067] Fig.11 It is a partial cross-sectional schematic diagram of the energy storage mechanism of the present invention;

[0068] Fig.12 It is a schematic diagram of the heat exchange mechanism structure of the present invention;

[0069] Fig.13 It is a partial cross-sectional schematic diagram of the lifting mechanism of the present invention.

[0070] In the figure: 100 outer box assembly, 110 outer box, 111 mounting groove, 120 fixing ring, 200 inner box assembly, 210 inner box, 211 upper box body, 2111 wind groove, 2112 mounting hole, 212 lower box body, 213 sewage outlet, 220 sealing plate, 221 mounting shaft, 222 first sealing surface, 223 second sealing surface, 224 windward surface, 300 filter screen, 400 driving mechanism, 410 bellows, 411 first top cover, 412 air inlet, 413 first exhaust port, 414 first drain port, 420 driving shaft, 421 driving blade, 430 water guide pipe, 50 0 cleaning mechanism, 510 rotating shaft, 520 spiral blade, 530 scraper rod, 600 separation mechanism, 610 liquid collecting cylinder, 620 screen, 621 transmission shaft, 630 sewage pipe, 631 sewage suction port, 700 energy storage mechanism, 710 energy storage box, 720 second top cover, 721 second exhaust port, 722 third exhaust port, 730 air intake pipe, 740 heat exchange mechanism, 741 coil, 742 water inlet, 743 second drain port, 750 exhaust pipe, 800 lifting mechanism, 810 mounting cylinder, 811 mounting plate, 812 third top cover, 820 telescopic rod, 821 piston. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] The present invention provides a fish seedling cultivation device which is convenient for water replacement and cleaning. The cleaning mechanism is driven by a driving mechanism to rotate to replace the water inside the inner box component for cleaning. The water replacement and cleaning can be performed during the fish seed cultivation and cultivation process without the need to transfer the fish seedlings. The labor intensity of the cultivation personnel is reduced while the water replacement and cleaning can be performed conveniently and quickly, thereby improving the work efficiency. Figure 1 , including: an outer box assembly 100, an inner box assembly 200, a filter screen 300, a driving mechanism 400, a cleaning mechanism 500, a separation mechanism 600, an energy storage mechanism 700 and a lifting mechanism 800; Example 1

[0073] See also Figure 1 The outer box assembly 100 is placed on the ground through a cushion block, the inner box assembly 200 is detachably mounted in the inner cavity of the outer box assembly 100, the top of the inner box assembly 200 is flush with the top of the outer box assembly 100, the inner cavity of the inner box assembly 200 is filled with water, and the fry are placed in the inner cavity of the inner box assembly 200 for breeding and cultivation;

[0074] The filter screen 300 is placed at the bottom of the inner cavity of the inner box assembly 200, dividing the inner cavity of the inner box assembly 200 into two parts, the lower part of the inner box assembly 200 is used to precipitate and discharge dirt, and the upper part of the inner box assembly 200 is used to breed and cultivate fish fry;

[0075] The driving mechanism 400 is a pneumatic driving mechanism, which is driven by pneumatic pressure to rotate. The driving mechanism 400 is detachably mounted on the bottom of the outer box assembly 100 and in contact with the ground.

[0076] The cleaning mechanism 500 can be rotatably installed in the lower space of the inner box assembly 200. The lower end of the cleaning mechanism 500 is connected to the driving mechanism 400. The top and side of the cleaning mechanism 500 are respectively in contact with the inner cavity side wall of the lower space of the inner box assembly 200 and the filter 300. The high-pressure gas enters the inner cavity of the driving mechanism 400 to drive the transmission device on the driving mechanism 400 to rotate, thereby driving the cleaning mechanism 500 to perform a rotational motion. The lower space of the inner box assembly 200 and the filter 300 are cleaned by the rotational motion of the cleaning mechanism 500. At the same time, the cleaned dirt is discharged from the inner cavity of the inner box assembly 200 by the rotation of the cleaning mechanism 500. Water can be changed and cleaned during the breeding and cultivation of fry, without the need to transfer the fry. While reducing the labor intensity of the breeding personnel, water can be changed and cleaned conveniently and quickly, thereby improving work efficiency. Example 2

[0077] See also Figure 1-4 and Figure 6-8 , the outer box assembly 100 includes an outer box 110 and a fixing ring 120;

[0078] The outer box 110 is a hollow cylindrical structure, and the outer box 110 is placed on the ground through a cushion block;

[0079] The fixing ring 120 is coaxially detachably mounted on the top of the outer box 110;

[0080] The inner box assembly 200 includes an inner box 210;

[0081] The inner box 210 includes an upper box body 211, a lower box body 212 and a sewage outlet 213;

[0082] The upper box body 211 is a hollow cylindrical structure;

[0083] The lower box body 212 is a hollow conical structure. The lower box body 212 is integrally formed at the bottom of the upper box body 211. The inner cavity of the lower box body 212 is connected with the inner cavity of the upper box body 211. Clean water is poured into the inner cavities of the upper box body 211 and the lower box body 212.

[0084] The sewage outlet 213 is integrally formed at the bottom of the lower box body 212 and is connected to the inner cavity of the lower box body 212. Dirt is discharged through the sewage outlet 213.

[0085] The outer diameter of the filter 300 is the same as the inner diameter of the upper box 211. The filter 300 is placed at the junction of the bottom of the inner cavity of the upper box 211 and the lower box 212. The filter 300 and the upper box 211 are transitionally matched. The fry are placed in the inner cavity of the upper box 211 for breeding and cultivation. The excrement of the fry and the feed residue are precipitated into the inner cavity of the lower box 212 through the filter 300.

[0086] The driving mechanism 400 includes a bellows 410 and a driving shaft 420;

[0087] The bellows 410 is detachably mounted at the bottom center of the outer box 110, and the bottom of the bellows 410 is in contact with the ground;

[0088] The top of the bellows 410 is detachably mounted on the first top cover 411, and a sealing treatment is performed between the first top cover 411 and the bellows 410;

[0089] An air inlet 412 and a first exhaust port 413 are integrally formed on the circumferential outer wall of the bellows 410. The air inlet 412 and the first exhaust port 413 are both connected to the inner cavity of the bellows 410. A high-pressure blower is detachably mounted on the end of the air inlet 412 away from the bellows 410. The high-pressure blower delivers high-pressure airflow to the inner cavity of the bellows 410, and the high-pressure airflow entering the inner cavity of the bellows 410 is discharged through the first exhaust port 413.

[0090] The drive shaft 420 is rotatably mounted in the inner cavity of the bellows 410. The drive shaft 420 is vertically arranged in the inner cavity of the bellows 410. The top end of the drive shaft 420 sequentially passes through the first top cover 411 and the bottom of the outer box 110 and is arranged in the inner cavity of the outer box 110.

[0091] The outer circumferential wall of the driving shaft 420 is evenly welded with driving blades 421 in a ring shape, and the high-pressure airflow blows on the driving blades 421 to drive the driving shaft 420 to rotate and generate rotational power;

[0092] The separation mechanism 600 is installed in the inner cavity of the outer box 110 and passes through the bottom of the outer box 110 to be connected with the driving mechanism 400. The separation mechanism 600 includes a liquid collecting cylinder 610 and a screen 620.

[0093] The liquid collecting cylinder 610 is composed of a cylindrical cylinder and two conical ends, the two conical ends are integrally formed at the upper and lower ends of the cylindrical cylinder, the conical end arranged at the lower end passes through the bottom of the outer box 110 and is detachably connected to the top of the first top cover 411, the driving shaft 420 passes through the conical end arranged at the lower end and is inserted into the bottom of the inner cavity of the cylindrical cylinder, the conical end arranged at the lower end and the first top cover 411 are sealed, the inner cavity of the liquid collecting cylinder 610 is connected with the inner cavity of the bellows 410, the conical end arranged at the upper end is detachably connected with the sewage outlet 213, the conical end arranged at the upper end and the sewage outlet 213 are sealed, and the inner cavity of the liquid collecting cylinder 610 is connected with the inner cavity of the lower box body 212;

[0094] The screen 620 is coaxially suspended in the inner cavity of the cylindrical barrel, the outer diameter of the screen 620 is smaller than the inner diameter of the cylindrical barrel, the top of the circumferential outer wall of the screen 620 is connected to the circumferential side wall of the inner cavity of the cylindrical barrel through a bearing, the bottom of the screen 620 is detachably connected to the top of the drive shaft 420 through a spline or a flat key, and the screen 620 is driven to rotate by the drive shaft 420;

[0095] The inner cavity of the screen 620 is provided with a transmission shaft 621, which is vertically arranged in the inner cavity of the screen 620, and the bottom end of the transmission shaft 621 is welded to the center position of the bottom of the inner cavity of the screen 620, and the top end of the transmission shaft 621 passes through the top of the liquid collecting cylinder 610, and drives the transmission shaft 621 to rotate through the screen 620;

[0096] The cleaning mechanism 500 includes a rotating shaft 510, a spiral blade 520 and a scraper rod 530;

[0097] The rotating shaft 510 is coaxially arranged vertically in the inner cavity of the sewage outlet 213, and the bottom end of the rotating shaft 510 is connected to the top of the transmission shaft 621 through a spline or a flat key, and the rotating shaft 510 is driven to rotate through the transmission shaft 621;

[0098] The spiral blade 520 is welded to the circumferential outer wall of the rotating shaft 510. The edge of the spiral blade 520 away from the rotating shaft 510 contacts the circumferential side wall of the inner cavity of the sewage outlet 213. The spiral blade 520 rotates with the rotating shaft 510. The rotation of the spiral blade 520 can discharge the dirt entering the inner cavity of the sewage outlet 213 into the inner cavity of the screen 620.

[0099] The scraper rod 530 is welded to the circumferential outer wall of the rotating shaft 510. The scraper rod 530 is arranged in the inner cavity of the lower box body 212. The scraper rod 530 is arranged in a triangular shape. The hypotenuse on the scraper rod 530 contacts the conical surface of the inner cavity of the lower box body 212. The horizontal surface on the scraper rod 530 contacts the bottom of the filter 300. The contact surface of the scraper rod 530 with the filter 300 is planted with bristles. The bristles contact the filter 300. The scraper rod 530 rotates with the rotating shaft 510 to clean the conical surface of the inner cavity of the lower box body 212. The dirt deposited on the conical surface moves toward the drain port 213 under the cleaning of the scraper rod 530 and the action of gravity, and the dirt is discharged into the inner cavity of the screen 620 through the spiral blade 520. The bristles on the scraper rod 530 clean the filter 300, and part of the deposited dirt is removed. The dirt on the filter screen 300 is cleaned by the bristles and falls into the inner cavity of the lower box body 212 and enters the inner cavity of the sewage outlet 213 and is discharged under the cleaning of the inclined surface of the scraper rod 530. The water can be changed and cleaned during the breeding and cultivation of fry, and the fry does not need to be transferred. The labor intensity of the breeding personnel is reduced and the water can be changed and cleaned conveniently and quickly, thereby improving work efficiency. At the same time, the rotation of the scraper rod 530 can drive the flow of breeding water. The water flow can keep the fry active, increase their exercise, promote the metabolism of the fry, contribute to the healthy growth of the fry, and enhance their physical fitness. The flow of water can also help oxygen dissolve better in the water, increase the dissolved oxygen content in the water, and sufficient oxygen supply can promote the growth and development of the fry. Example 3

[0100] See also Figure 1-6 and Fig.11 A mounting groove 111 is provided at the top of the inner circumferential side wall of the outer box 110, and a wind knife is installed in the inner cavity of the mounting groove 111. The wind knife is obliquely arranged in the inner cavity of the outer box 110, and the air outlet on the wind knife is arranged away from the inner circumferential side wall of the outer box 110;

[0101] The inner side of the fixing ring 120 is provided with the same groove as the mounting groove 111. The groove on the fixing ring 120 is clamped on the top of the wind knife, and the wind knife is fixed on the outer box 110 through the fixing ring 120.

[0102] An air groove 2111 is provided on the circumferential outer wall of the upper box body 211. The air groove 2111 obliquely penetrates the circumferential side wall of the inner cavity of the upper box body 211 and is connected to the inner cavity of the upper box body 211. The air groove 2111 corresponds to the air outlet on the wind knife. The air pressure discharged from the air outlet of the wind knife enters the inner cavity of the upper box body 211 through the air groove 2111 to sweep the circumferential side wall of the inner cavity of the upper box body 211, and clean the dirt adhering to the circumferential side wall of the inner cavity of the upper box body 211.

[0103] Mounting holes 2112 are provided at both the upper and lower ends of the inner cavity of the air slot 2111;

[0104] The inner box assembly 200 also includes a sealing plate 220;

[0105] The upper and lower ends of the sealing plate 220 are integrally formed with mounting shafts 221, which match the mounting holes 2112. The mounting shafts 221 are inserted into the inner cavity of the mounting holes 2112. The sealing plate 220 is mounted on the inner side of the wind slot 2111 by the matching use of the mounting shafts 221 and the mounting holes 2112. Part of the structure on the sealing plate 220 passes through the wind slot 2111 and is arranged in the inner cavity of the upper box body 211. A coil spring is installed between the mounting shaft 221 and the mounting holes 2112. The elastic force of the coil spring drives the sealing plate 220 to flip so that the part of the sealing plate 220 arranged in the inner cavity of the upper box body 211 flips and covers the circumferential side wall of the inner cavity of the upper box body 211 to block the wind slot 2111.

[0106] The side of the sealing plate 220 is provided with a first sealing surface 222 and a second sealing surface 223. The first sealing surface 222 is provided in the inner cavity of the wind slot 2111, and the second sealing surface 223 is provided in the inner cavity of the upper box body 211. When the sealing plate 220 covers the circumferential side wall of the inner cavity of the upper box body 211, the first sealing surface 222 is closely attached to the inner cavity side wall of the wind slot 2111, and the second sealing surface 223 is closely attached to the inner cavity circumferential side wall of the upper box body 211. When the wind knife is exhausted, the air pressure discharged by the wind knife is reduced. The elastic force of the service coil spring drives the second sealing surface 223 on the sealing plate 220 to flip toward the side of the inner cavity circumferential side wall away from the upper box body 211, and the airflow is ejected through the gap between the second sealing surface 223 and the inner cavity circumferential side wall of the upper box body 211 to clean the dirt adhering to the inner cavity circumferential side wall of the upper box body 211. When the wind knife stops exhausting, the sealing plate 220 is reset under the elastic force of the coil spring to block the air slot 2111, so as to prevent the water in the inner cavity of the upper box body 211 from being discharged through the air slot 2111.

[0107] A windward surface 224 is provided on the sealing plate 220 adjacent to the second sealing surface 223. The windward surface 224 guides the airflow so that the airflow can be sprayed onto the inner cavity circumferential side wall of the upper box body 211. The high-intensity airflow generated by the air knife is used to clean the dirt adhering to the inner cavity circumferential side wall of the upper box body 211, which can further ensure the cleanliness of the aquaculture water and the normal growth requirements of the fry.

[0108] The energy storage mechanism 700 is installed in the inner cavity of the outer box 110 for accumulating air pressure. The energy storage mechanism 700 includes an energy storage box 710, a second top cover 720 and an air intake pipe 730;

[0109] The energy storage box 710 is detachably mounted in the inner cavity of the outer box 110 and is arranged at the lower end of the sewage outlet 213. The inner cavity of the energy storage box 710 is equipped with an air pressure sensor for detecting the air pressure intensity of the inner cavity of the energy storage box 710.

[0110] One end of the air intake pipe 730 is detachably mounted on the end of the first exhaust port 413 away from the bellows 410, and the other end of the air intake pipe 730 passes through the bottom of the outer box 110 and is connected to the bottom of the energy storage box 710. The air intake pipe 730 is connected to the inner cavity of the energy storage box 710. The high-pressure airflow generated by the high-pressure blower enters the inner cavity of the bellows 410 through the air intake port 412 to drive the driving shaft 420 to rotate, and then the high-pressure airflow entering the inner cavity of the bellows 410 is discharged to the inner cavity of the air intake pipe 730 through the first exhaust port 413, and enters the inner cavity of the energy storage mechanism 700 through the air intake pipe 730 to store energy. A check valve is installed between the air intake pipe 730 and the first exhaust port 413, so that the air pressure can only enter the inner cavity of the energy storage box 710 through the air intake pipe 730 but cannot flow back to the inner cavity of the bellows 410 through the air intake pipe 730.

[0111] The second top cover 720 is detachably mounted on the top of the energy storage box 710, and a sealing treatment is performed between the second top cover 720 and the energy storage box 710;

[0112] The top of the second top cover 720 is integrally formed with a second exhaust port 721 in the shape of a ring. The second exhaust port 721 is connected to the inner cavity of the energy storage box 710. The number of the second exhaust ports 721 is the same as the number of air knives. One second exhaust port 721 corresponds to one air knife. An electromagnetic valve is installed on the end of the second exhaust port 721 away from the second top cover 720. The electromagnetic valve is connected to the air knife through a pipeline. The air pressure of the air knife is turned on and off by the electromagnetic valve. When the air pressure in the inner cavity of the energy storage box 710 reaches a certain intensity, the electromagnetic valve is opened, and the air pressure is transported to the air knife through the pipeline. The air knife is used to spray out the dirt adhering to the circumferential side wall of the inner cavity of the upper box body 211. After the inner cavity pressure of the energy storage box 710 drops to a certain level, the electromagnetic valve is closed to continue to store energy. The dirt adhering to the circumferential side wall of the inner cavity of the upper box body 211 can be regularly cleaned to ensure water quality. At the same time, the high-pressure airflow is sprayed onto the aquaculture water to drive the flow of water and further increase the dissolved oxygen content in the water. Example 4

[0113] See also Figure 1 and Figure 6-12 , the separation mechanism 600 further includes a sewage pipe 630;

[0114] One end of the sewage pipe 630 penetrates into the inner cavity of the screen 620 but does not contact the bottom of the inner cavity of the screen 620, and the other end of the sewage pipe 630 passes through the liquid collecting cylinder 610 and the outer box 110 in sequence and is connected to the sewage pump;

[0115] A sewage suction port 631 is integrally formed on the circumferential outer wall of one end of the sewage pipe 630 that penetrates into the inner cavity of the screen 620. The sewage suction port 631 is arranged close to the circumferential side wall of the inner cavity of the screen 620 but does not contact the circumferential side wall of the inner cavity of the screen 620.

[0116] The dirt is discharged into the inner cavity of the screen 620 through the spiral blade 520. The screen 620 rotates under the drive of the drive shaft 420 to generate centrifugal force. The centrifugal force generated by the rotation of the screen 620 is used to throw out the water in the dirt. The water in the dirt passes through the screen 620 and is thrown onto the circumferential side wall of the inner cavity of the liquid collecting cylinder 610. Thereafter, the water flows into the inner cavity of the bellows 410 under the action of gravity. The dirt from which the water is removed remains in the inner cavity of the screen 620, so that the water in the dirt can be separated into solid and liquid.

[0117] The sewage pump generates suction force on the inner cavity of the sewage pipe 630, and the sewage pipe 630 and the sewage suction port 631 are used to clean the dirt left on the bottom of the inner cavity of the screen 620 and the circumferential side wall of the inner cavity, and the dirt left on the inner cavity is pumped out from the inner cavity of the screen 620 to avoid the residual dirt from clogging the screen 620, thereby ensuring the normal use of the screen 620;

[0118] The bottom of the bellows 410 is a conical structure. A first drain port 414 is integrally formed on the bottom cylindrical structure of the bellows 410. The first drain port 414 is connected to the inner cavity of the bellows 410. The water entering the inner cavity of the bellows 410 is thrown onto the circumferential side wall of the inner cavity of the bellows 410 under the centrifugal force generated by the rotation of the driving blades 421, and then enters the bottom conical structure of the bellows 410 under the action of gravity and is discharged through the first drain port 414.

[0119] The driving mechanism 400 further includes a water conduit 430;

[0120] One end of the water conduit 430 is detachably connected to the first drain port 414. A water pump is installed on the water conduit 430. The water entering the inner cavity of the first drain port 414 is pumped into the inner cavity of the water conduit 430 by the water pump and discharged through the water conduit 430. The water pump will not burn out even when idling, and can effectively avoid the damage caused by insufficient water flow entering the water conduit 430.

[0121] The energy storage mechanism 700 further includes a heat exchange mechanism 740, which is installed in the inner cavity of the energy storage box 710;

[0122] The heat exchange mechanism 740 includes a coil 741, a water inlet 742 and a second water outlet 743;

[0123] The coil 741 is detachably mounted in the inner cavity of the energy storage box 710;

[0124] The water inlet 742 is integrally formed on the outer end of the coil 741, and the water inlet 742 is vertically downwardly arranged and sequentially penetrates the bottom of the energy storage box 710 and the bottom of the outer box 110 and is connected to the end of the water conduit 430 away from the first drain port 414. The water pump is used to pump the water entering the inner cavity of the water conduit 430 to the inner cavity of the water inlet 742 and enters the inner cavity of the coil 741 through the water inlet 742, and the air is compressed in the inner cavity of the energy storage box 710. , air compression generates heat, water enters the inner cavity of the coil 741 and exchanges heat with the heat generated when the air is compressed in the inner cavity of the energy storage box 710, heating the water in the inner cavity of the coil 741. The purpose of adjusting the water temperature is achieved by adjusting the water flow rate in the inner cavity of the coil 741. The faster the flow rate, the lower the water temperature, and the slower the flow rate, the higher the water temperature. The water temperature in the inner cavity of the coil 741 is adjusted according to the water temperature in the inner cavity of the inner box 210, so that the water temperature in the inner cavity of the inner box 210 is maintained between 20-30°C;

[0125] The second drain port 743 is integrally formed on the coil 741 and is arranged on one end of the inner side. The end of the second drain port 743 away from the coil 741 passes through the second top cover 720 and the outer box 110 in sequence and is arranged on the upper end of the upper box body 211. The water after heat exchange flows back to the inner cavity of the upper box body 211 through the second drain port 743, so that the decontaminated water can be recycled, saving water resources.

[0126] A water pipe connected to an external water source is also installed on one end of the second drain port 743 adjacent to the upper box body 211 for adjusting the water temperature and replenishing water. Example 5

[0127] See also Figure 1-2 , Fig.11 and Fig.13 The top of the second top cover 720 is integrally formed with a third exhaust port 722 which is in communication with the inner cavity of the energy storage box 710, and the third exhaust port 722 is installed with a solenoid valve;

[0128] The energy storage mechanism 700 further includes an exhaust pipe 750;

[0129] One end of the exhaust pipe 750 is detachably connected to the solenoid valve on the third exhaust port 722, and the passage between the exhaust pipe 750 and the energy storage box 710 is opened and closed by the solenoid valve;

[0130] The lifting mechanism 800 is installed outside the outer box 110, and the lifting mechanism 800 includes a mounting tube 810 and a telescopic rod 820;

[0131] A mounting plate 811 is integrally formed on the circumferential outer wall of the mounting cylinder 810, and the mounting plate 811 can be detachably mounted on the top of the circumferential outer wall of the outer box 110;

[0132] The bottom of the installation cylinder 810 is connected to the end of the exhaust pipe 750 away from the third exhaust port 722, and the inner cavity of the installation cylinder 810 is connected to the inner cavity of the exhaust pipe 750. A solenoid valve is also installed at the bottom of the installation cylinder 810, and the inner cavity of the installation cylinder 810 is exhausted through the solenoid valve installed on the installation cylinder 810;

[0133] A third top cover 812 is detachably mounted on the top of the installation tube 810, and a sealing treatment is performed between the third top cover 812 and the installation tube 810;

[0134] One end of the telescopic rod 820 passes through the third top cover 812 and is inserted into the inner cavity of the installation cylinder 810, and the other end of the telescopic rod 820 extends to the inner cavity of the upper box body 211 and is detachably connected to the top of the filter screen 300;

[0135] A piston 821 is detachably mounted on one end of the telescopic rod 820 that is plugged into the mounting tube 810. The piston 821 and the inner circumferential side wall of the mounting tube 810 are movably sealed.

[0136] The pressure condition for opening the solenoid valve on the third exhaust port 722 is lower than the pressure condition for opening the solenoid valve on the second exhaust port 721. That is to say, when the inner cavity of the energy storage box 710 reaches a certain pressure condition, the solenoid valve on the third exhaust port 722 is opened first, and the air pressure enters the inner cavity of the installation cylinder 810 through the exhaust pipe 750 to drive the piston 821 to move upward, and the telescopic rod 820 is driven upward by the piston 821, and the filter screen 300 is driven upward by the telescopic rod 820 until the filter screen 300 floats to the surface. Since the fry is placed on the upper end of the filter screen 300, the fry is driven to float to the surface through the filter screen 300. Thereafter, the second exhaust port 722 is opened. The solenoid valve on 21 is opened, and air pressure enters the wind knife, and is discharged into the inner cavity of the upper box body 211 through the wind knife to clean the circumferential side wall of the inner cavity of the upper box body 211. The time for the wind knife to clean the circumferential side wall of the inner cavity of the upper box body 211 is 5-7 seconds, which avoids damage to the fry when the air pressure of the wind knife is discharged. After the cleaning is completed, the solenoid valve on the third exhaust port 722 and the solenoid valve on the second exhaust port 721 are closed at the same time. At this time, the solenoid valve on the mounting cylinder 810 is opened to exhaust the inner cavity of the mounting cylinder 810, and the pressure in the inner cavity of the mounting cylinder 810 is reduced. The piston 821 moves downward to drive the filter screen 300 to move downward, and the fry are placed in the water again. Example 6

[0137] The control system includes an acquisition module, a storage module, a processing module and a control module;

[0138] The acquisition module is used to collect water flow velocity data and water temperature data. The acquisition module includes a water flow sensor and a temperature sensor. The water flow sensor and the temperature sensor are both installed in the inner cavity of the upper box body 211. The storage module is used to set the comparison data. The processing module is electrically connected to the acquisition module and the storage module respectively, and is used to compare the collected data and the comparison data and output the comparison result. The control module is electrically connected to the processing module and is used to output different control signals according to the comparison result. The control module is connected to the high-pressure blower and the water pump installed on the water pipe 430 respectively, and controls the high-pressure blower and the water pump on the water pipe 430 respectively. The control module is embedded with a frequency conversion module, a communication module and a timer;

[0139] The control system includes the following specific operation steps:

[0140] Set the water flow rate data to W through the storage module 0 , set the water temperature data to T 0 , the data collected by the water flow sensor is W 1 , the water temperature data collected by the temperature sensor is T 1 ;

[0141] When T 1 <T 0 <1.27×T 1 , W 1 <W 0 <1.5378×W 1 When , it means that the water temperature and water flow rate of the inner cavity of the upper box 211 are at a water temperature suitable for the survival of the fry and a water flow rate suitable for the activity of the fry. At this time, the blowing rate of the high-pressure blower works according to the normally set parameters. However, when the temperature remains unchanged, 1.5378×W 1 <W 0 <1.8379×W 1 When the water flow rate in the inner cavity of the upper box body 211 is high, the control module is used to reduce the blowing rate of the high-pressure blower, and the water temperature is continuously monitored. When the water temperature rises significantly, the control module is used to increase the pumping rate of the water pump and the water flow rate to achieve the purpose of cooling. If cooling is still not possible, the external water source is opened to cool the water by using the external water source.

[0142] When 1.27×T 1 <T 0 <1.78×T 1 , W 1 <W 0 <1.5378×W 1When the temperature rises significantly, the water pump speed is increased and the water flow rate is increased to achieve the purpose of cooling. If the temperature cannot be cooled, the external water source is opened and cooled by the external water source. At this time, the control module controls the timer to start timing. If the water temperature does not drop significantly within 5-10 minutes, the communication module sends a remote alarm to the breeder. At the same time, the high-pressure blower and the water pump are turned off, waiting for the breeder to handle the problem.

[0143] When 1.78×T 1 <T 0 <2.04×T 1 When a problem occurs, a remote alarm is sent to the breeders through the communication module. At the same time, the high-pressure blower and water pump are turned off, waiting for the breeders to handle the problem.

[0144] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fish seedling cultivation device that is convenient for water change and cleaning, characterized in that: include: An outer box assembly (100), wherein the outer box assembly (100) is placed on the ground; An inner box assembly (200), the inner box assembly (200) being arranged in the inner cavity of the outer box assembly (100) for cultivating fry, the outer box assembly (100) comprising: An outer box (110), wherein a mounting groove (111) is provided on a circumferential side wall of an inner cavity of the outer box (110), and an air knife is installed in the inner cavity of the mounting groove (111); A fixing ring (120), the fixing ring (120) being arranged at the upper end of the outer box (110) to fix the wind knife; a filter screen (300), the filter screen (300) being arranged in the inner cavity of the inner box assembly (200) to divide the inner cavity of the inner box assembly (200) into two upper and lower parts, and the fry are cultivated in the upper part of the inner cavity of the inner box assembly (200); A driving mechanism (400), the driving mechanism (400) being arranged at the bottom of the outer box assembly (100); a cleaning mechanism (500), the cleaning mechanism (500) being arranged in the inner cavity of the inner box assembly (200) and connected to the driving mechanism (400), the cleaning mechanism (500) being in contact with the filter screen (300), and the driving mechanism (400) driving the cleaning mechanism (500) to rotate to clean the inner cavity of the inner box assembly (200) and the filter screen (300); The inner cavity of the outer box assembly (100) is provided with an energy storage mechanism (700), and the energy storage mechanism (700) is respectively connected to the driving mechanism (400) and the wind knife, and is used to provide kinetic energy of the wind knife. The energy storage mechanism (700) comprises: Energy storage tank (710); a second top cover (720), wherein the second top cover (720) is arranged on the top of the energy storage box (710), a second exhaust port (721) and a third exhaust port (722) are arranged on the top of the second top cover (720), and the second exhaust port (721) is connected to the air knife via a pipeline; An air intake pipeline (730), wherein the air intake pipeline (730) is arranged at the bottom of the energy storage box (710); A heat exchange mechanism (740), the heat exchange mechanism (740) being arranged in the inner cavity of the energy storage box (710), and two ends of the heat exchange mechanism (740) respectively passing through the bottom of the energy storage box (710) and the top of the second top cover (720); an exhaust duct (750), the exhaust duct (750) being connected to the third exhaust port (722); A lifting mechanism (800) is disposed on the outside of the outer box assembly (100), and the lifting mechanism (800) is connected to the energy storage mechanism (700) and the filter screen (300) respectively, and the energy storage mechanism (700) provides kinetic energy to drive the lifting mechanism (800) to drive the filter screen (300) to move up and down; A control system, wherein the control system is arranged outside the outer box assembly (100).

2. A fish seedling cultivation device that is easy to change water and clean according to claim 1, characterized in that: The inner box assembly (200) comprises: An inner box (210), the inner box (210) comprising an upper box body (211), a lower box body (212) and a sewage outlet (213), the lower box body (212) being arranged at the lower end of the upper box body (211), the sewage outlet (213) being arranged at the lower end of the lower box body (212), an air groove (2111) being provided on the circumferential outer wall of the upper box body (211), the air groove (2111) corresponding to the air knife, and the wind force blown out by the air knife enters the inner cavity of the upper box body (211) through the air groove (2111) to clean the circumferential side wall of the inner cavity of the upper box body (211); A sealing plate (220) is movably mounted in the inner cavity of the air slot (2111) to intermittently seal the air slot (2111).

3. The fish seedling cultivation device that is easy to change water and clean according to claim 1 is characterized by: The driving mechanism (400) comprises: A bellows (410), wherein a first top cover (411) is disposed on the top of the bellows (410), an air inlet (412) and a first air outlet (413) are disposed on the circumferential outer wall of the bellows (410), a high-pressure blower is disposed at the end of the air inlet (412) to deliver a high-pressure airflow to the inner cavity of the bellows (410), and a first water outlet (414) is disposed at the bottom of the bellows (410); a driving shaft (420), the driving shaft (420) being arranged in the inner cavity of the bellows (410) and penetrating the top of the first top cover (411) and being inserted into the inner cavity of the outer box assembly (100); a driving blade (421) being arranged on the circumferential outer wall of the driving shaft (420); the driving blade (421) being arranged in the inner cavity of the bellows (410) corresponding to the air inlet (412), and the driving blade (421) being driven to rotate by the high-pressure airflow; A water conduit (430), one end of the water conduit (430) being connected to the first drain outlet (414).

4. The fish seedling cultivation device that is easy to change water and clean according to claim 1 is characterized in that: The cleaning mechanism (500) comprises: Axis (510); A spiral blade (520), wherein the spiral blade (520) is arranged on an outer circumferential wall of the rotating shaft (510); A scraper rod (530), the scraper rod (530) being arranged on the circumferential outer wall of the rotating shaft (510) and arranged on the upper end of the spiral blade (520).

5. The fish seedling cultivation device that is convenient for water change and cleaning according to claim 4 is characterized in that: A separation mechanism (600) is provided at the lower end of the cleaning mechanism (500). The separation mechanism (600) is provided in the inner cavity of the outer box assembly (100). The separation mechanism (600) intermittently communicates with the inner cavity of the inner box assembly (200) through the cleaning mechanism (500) to perform solid-liquid separation on the dirt discharged by the cleaning mechanism (500). The separation mechanism (600) comprises: Liquid collecting cylinder (610); A screen (620), the screen (620) being arranged in the inner cavity of the liquid collecting cylinder (610), the inner cavity of the screen (620) being provided with a transmission shaft (621), the transmission shaft (621) penetrating the liquid collecting cylinder (610) and being connected to the rotating shaft (510); A sewage discharge pipe (630), the sewage discharge pipe (630) being arranged in the inner cavity of the screen (620), the ends of the sewage discharge pipe (630) respectively passing through the liquid collecting cylinder (610) and the outer box assembly (100) to be connected to a sewage discharge pump, and the solid dirt in the inner cavity of the screen (620) is discharged by the suction force of the sewage discharge pump, and a sewage suction port (631) is provided on the circumferential outer wall of one end of the inner cavity of the screen (620) of the sewage discharge pipe (630), and the sewage suction port (631) is adjacent to the circumferential side wall of the inner cavity of the screen (620), and is used to clean dirt on the circumferential side wall of the inner cavity of the screen (620).

6. The fish seedling cultivation device that is convenient for water change and cleaning according to claim 1 is characterized in that: The lifting mechanism (800) comprises: A mounting cylinder (810), wherein a mounting plate (811) is provided on a circumferential outer wall of the mounting cylinder (810), a third top cover (812) is provided on the top of the mounting cylinder (810), and the bottom of the mounting cylinder (810) is connected to the exhaust pipe (750); A telescopic rod (820), one end of the telescopic rod (820) being arranged in the inner cavity of the mounting cylinder (810), the other end of the telescopic rod (820) being connected to the filter screen (300), and a piston (821) being arranged at one end of the telescopic rod (820) arranged in the inner cavity of the mounting cylinder (810), the circumferential outer side wall of the piston (821) being in contact with the circumferential side wall of the inner cavity of the mounting cylinder (810).

7. The fish seedling cultivation device that is convenient for water change and cleaning according to claim 1 is characterized in that: The control system comprises: A collection module, the collection module is used to collect water flow velocity data and water temperature data; A storage module, wherein the storage module is used to set comparison data; A processing module, the processing module is electrically connected to the acquisition module and the storage module respectively, and is used to compare the collected data with the comparison data and output the comparison result; A control module is electrically connected to the processing module and is used to output different control signals according to the comparison result.

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