Fish fry rearing device capable of being cleaned by changing water

Abstract

The invention relates to the technical field of fish fry rearing, and provides a fish fry rearing device capable of being cleaned by changing water, which comprises a rearing box, the bottom of the rearing box is fixedly connected with a support frame, the inner bottom of the rearing box is fixedly connected with a limiting rod, and the surface of the limiting rod is sleeved with a compression spring. The intermittent water changing mechanism is arranged, so that when fresh water needs to be added into the cultivation box, the fresh water can be firstly added into the water changing box, a disinfectant is added, then a stirring motor is started to drive a stirring shaft to rotate for uniform stirring, and then a rotating motor is started; at the moment, through cooperation of a rotating shaft, a rotating gear A, a toothed bar A, a telescopic spring and other assemblies, a sealing plate repeatedly moves downwards to open a water gate, through intermittent opening of the water gate, fresh water in the water changing box can be intermittently discharged into the cultivation box, and therefore the fresh water can be added in the fry cultivation process; and the process of adding fresh water is slow, so that fish fries do not adapt.

Description

Technical Field

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

[0002] The process of raising fish fry into edible fish or fish for release. Fry are weak, have poor adaptability to the environment, have a narrow range of food, are not very active in taking food, and are easily killed and attacked by enemies. Therefore, they must be carefully raised and managed in small artificially controlled water bodies to be raised into strong fish of a certain size. Fry cultivation is an important part of the fish farming process.

[0003] The patent document with publication number CN118020697B discloses a fish fry cultivation device that is easy to change water and clean, including: a main box body, a sub-box body is connected to the side of the main box body, and a through groove is provided between the sub-box body and the main box body; a supporting assembly, the supporting assembly is installed in the main box body and is used for supporting and transferring fish fry, and a cylinder for driving the supporting assembly to move up and down is installed at the bottom of the main box body.

[0004] In the above application documents, water is drained by opening a drain hole at the bottom of the main box body, and the cylinder drives the supporting assembly to move downward. When the gear on the filter plate passes through the rack, the gear drives the filter plate to rotate through the one-way bearing to realize the flipping of the filter plate. At this time, water can be injected to rinse the filter plate and the main box body to discharge impurities therein. It is difficult to change the water at the same time during the fry cultivation process, which is easy to affect the fry cultivation, and a one-time water change will cause a large change in water quality, which may make it difficult for the fry to adapt. Summary of the invention

[0005] The present invention provides a fish seedling cultivation device with water exchange and cleaning, which solves the problem in the related art that a one-time water exchange may cause a significant change in water quality and may make it difficult for fish seedlings to adapt.

[0006] The technical solution of the present invention is as follows: a water-changing and cleaning fish seedling cultivation device comprises a cultivation box, the bottom of the cultivation box is fixedly connected to a support frame, the inner bottom of the cultivation box is fixedly connected to a limit rod, the surface of the limit rod is sleeved with a compression spring, the surface of the limit rod is slidably connected to a filter screen, a gate is opened at the inner rear end of the cultivation box, an intermittent water adding mechanism is arranged at the rear end of the cultivation box, a matching drainage mechanism is arranged on the side of the cultivation box, and a shaking mechanism is arranged at the inner bottom of the cultivation box; the intermittent water adding mechanism comprises a water changing box, a hollow seat, a rotating shaft and a rotating motor, the water changing box is fixedly connected to a limit rod, a compression spring is sleeved on the surface of the limit rod, a filter screen is slidably connected to the surface of the limit rod ... The invention relates to a hollow seat which is fixedly connected to the rear end of the incubator, the water change tank is rotatably connected to a stirring shaft inside the water change tank, a stirring motor is fixedly installed on the side of the water change tank, the hollow seat is fixedly connected to the inside of the gate, a slide cylinder is fixedly connected to the inside of the hollow seat, a slide rod is slidably connected to the inside of the slide cylinder, a telescopic spring is sleeved on the surface of the slide rod, a closing plate is fixedly connected to the top of the slide rod, a gear rod A is fixedly connected to the bottom of the closing plate, the rotating shaft penetrates and is rotatably connected to the incubator and the front end of the hollow seat, the rotating motor is fixedly installed at the front end of the incubator, and a rotating gear A is fixedly connected to the rear end of the rotating shaft.

[0007] Optionally, the output shaft of the stirring motor is fixedly connected to the stirring shaft, the surface of the stirring shaft is provided with stirring blades, and the output shaft of the rotating motor is fixedly connected to the rotating shaft. When the stirring motor is turned on, the output shaft of the stirring motor will drive the stirring shaft to rotate, and when the rotating motor is turned on, the rotating shaft will be driven to rotate through its output shaft.

[0008] Optionally, the top of the closing plate is initially in close contact with the inner top of the gate, and the width of the closing plate is equal to the width of the gate. The closing plate will make the gate closed in the initial state, and the closing plate will open when it moves downward.

[0009] Optionally, the teeth on the gear rod A are initially meshed with the teeth on the rotating gear A. The rotating gear A is an incomplete gear. When the rotating gear A rotates at the beginning, the gear rod A is driven to move downward.

[0010] Optionally, the cooperative drainage mechanism includes a pressure chamber, a bevel gear A and a rotating rod, the pressure chamber is fixedly connected to the side of the incubator, the internal piston of the pressure chamber is slidably connected to a piston plate, the bottom of the piston plate is fixedly connected to a vertical rod, the surface of the vertical rod is sleeved with a return spring, the bottom of the vertical rod is fixedly connected to a gear rod B, a suction pipe and a drainage pipe are fixedly installed on both sides of the pressure chamber, and a one-way valve is provided inside the suction pipe and the drainage pipe, the bevel gear A is fixedly connected to the surface of the rotating shaft, the rotating rod penetrates and is rotatably connected to the side of the incubator, and the two ends of the rotating rod are fixedly connected to the bevel gear B and the rotating gear B respectively.

[0011] Optionally, the rotating gear B is an incomplete gear, and the teeth on the rotating gear B are initially meshed with the teeth on the gear rod B. The bevel gear A and the bevel gear B are initially in vertical meshing state. At the beginning, when the rotating gear B rotates, it will drive the gear rod B to move downward, and the rotation of the bevel gear A will drive the bevel gear B to rotate.

[0012] Optionally, the one-way valve in the water suction pipe is one-way conductive toward the inside of the pressure chamber, and the one-way valve in the drain pipe is one-way conductive toward the outside of the pressure chamber. When negative pressure is formed in the pressure chamber, water in the incubator is sucked into the pressure chamber through the water suction pipe, and when the water in the pressure chamber is squeezed, it is discharged through the drain pipe.

[0013] Optionally, the shaking mechanism includes two groups of support rods and extrusion blocks, the bottoms of the two groups of support rods are fixedly connected to the inner bottom of the incubator, the tops of the two groups of support rods are fixedly connected to a pneumatic chamber, one end of the two groups of pneumatic chambers is provided with an air bag, the other ends of the two groups of pneumatic chambers are piston-slidingly connected to piston rods, the tops of the two groups of piston rods are fixedly connected to push plates, and the extrusion blocks are fixedly connected to the surface of the rotating shaft.

[0014] Optionally, one end of the two groups of airbags away from the air pressure chamber is close to the extrusion block, and the two groups of airbags are in an expanded state in the initial state. When the extrusion block rotates with the rotating shaft, it will repeatedly squeeze the two groups of airbags at the same time. When the airbags are squeezed, the air pressure inside them will enter the air pressure chamber and push the piston rod to move upward.

[0015] Optionally, the two groups of air pressure chambers are symmetrically arranged on the center line of the incubator, and the tops of the two groups of push plates are in contact with the bottom of the filter in an initial state. When the two groups of push plates move upward at the same time, they will stably drive the filter to move upward.

[0016] The working principle and beneficial effects of the present invention are: 1. The present invention is provided with an intermittent water changing mechanism, so that when new water needs to be added to the incubator, new water can be added to the water changing tank first, and a disinfectant can be added, and then the stirring motor is turned on to drive the stirring shaft to rotate for uniform stirring, and then the rotating motor is turned on. At this time, the closing plate will repeatedly move downward to open the gate through the cooperation of the rotating shaft, the rotating gear A, the gear rod A, the telescopic spring and other components. The new water in the water changing tank can be intermittently discharged into the incubator through the intermittent opening of the gate, so that new water can be added during the fry cultivation process, and the process of adding new water is slow and will not cause the fry to be unable to adapt.

[0017] 2. The present invention is provided with a coordinated drainage mechanism, so that when the rotating motor is turned on to intermittently open the gate to change the water, the bevel gear A, bevel gear B, rotating gear B, gear rod B and other components will cooperate to make the water suction pipe continuously absorb the old water under the filter in the incubator and discharge it to the outside of the incubator through the drainage pipe, thereby cooperating with the intermittent water adding mechanism to replace the water in the incubator, and the overall water changing effect is better.

[0018] 3. The present application is provided with a shaking mechanism, so that when the rotating motor is turned on to intermittently open the gate for water change, the two sets of push plates will be driven to move upward and hit the filter through the cooperation of components such as the extrusion block, two sets of air bags, and two sets of air pressure chambers, so that the filter will shake and move upward for a distance, and then it will be restored due to the drop of gravity, so that the impurities on the filter will be ensured to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0020] Figure 1 It is a three-dimensional front view of the overall structure of the present invention; Figure 2 It is a three-dimensional back view of the overall structure of the present invention; Figure 3 It is a three-dimensional cross-sectional view of the overall structure of the present invention; Figure 4 It is a three-dimensional cross-sectional view of the intermittent water adding mechanism structure of the present invention; Figure 5 This is a three-dimensional cross-sectional view of the drainage mechanism structure of the present invention; Figure 6 It is a three-dimensional schematic diagram of the shaking mechanism structure of the present invention; Figure 7 For the present invention Figure 6 A magnified view of the structure in the middle.

[0021] In the figure: 1. incubator; 2. support frame; 3. limit rod; 4. compression spring; 5. filter screen; 6. gate; 7. intermittent water adding mechanism; 71. water changing tank; 72. stirring shaft; 73. stirring motor; 74. hollow seat; 75. slide cylinder; 76. slide rod; 77. telescopic spring; 78. closing plate; 79. gear rod A; 710. rotating shaft; 711. rotating motor; 712. rotating gear A; 8. matching drainage mechanism; 81. pressure chamber; 82. piston plate; 83. vertical rod; 84. reset spring; 85. gear rod B; 86. bevel gear A; 87. rotating rod; 88. bevel gear B; 89. rotating gear B; 811. water suction pipe; 812. drainage pipe; 9. shaking mechanism; 91. support rod; 92. air pressure chamber; 93. air bag; 94. piston rod; 95. push plate; 96. extrusion block. DETAILED DESCRIPTION In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0022] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0023] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] Example 1 Reference Figure 1 to Figure 7, which is the first embodiment of the present invention, proposes a fish seedling cultivation device for water exchange and cleaning, including a cultivation box 1, the bottom of the cultivation box 1 is fixedly connected to a support frame 2, the inner bottom of the cultivation box 1 is fixedly connected to a limit rod 3, the surface of the limit rod 3 is sleeved with a compression spring 4, the surface of the limit rod 3 is slidably connected to a filter screen 5, the rear end of the cultivation box 1 is provided with a gate 6, the rear end of the cultivation box 1 is provided with an intermittent water adding mechanism 7, the side of the cultivation box 1 is provided with a matching drainage mechanism 8, and the bottom of the cultivation box 1 is provided with a shaking mechanism 9; the intermittent water adding mechanism 7 includes a water exchange tank 71, a hollow seat 74, a rotating shaft 710 and a rotating motor 711, the water exchange tank 71 is fixedly connected to the rear end of the cultivation box 1, the interior of the water exchange tank 71 is rotatably connected to a stirring shaft 72, the side of the water exchange tank 71 is fixedly installed with a stirring motor 73, the hollow seat 74 is fixedly connected to the inside of the gate 6, and the interior of the hollow seat 74 is fixedly connected to a slide cylinder 7 5. The interior of the slide cylinder 75 is slidably connected with a slide rod 76, and the surface of the slide rod 76 is sleeved with a telescopic spring 77. The top of the slide rod 76 is fixedly connected with a closing plate 78. The top of the closing plate 78 is tightly fitted with the inner top of the gate 6 in the initial state, and the width of the closing plate 78 is equal to the width of the gate 6. The closing plate 78 will make the gate 6 in the initial state, and the closing plate 78 will open the gate 6 when it moves downward. The bottom of the closing plate 78 is fixedly connected with a gear rod A79. The rotating shaft 710 penetrates and is rotatably connected with the front end of the incubator 1 and the hollow seat 74. The rotating motor 711 is fixedly installed at the front end of the incubator 1. The rear end of the rotating shaft 710 is fixedly connected with a rotating gear A712. The teeth on the gear rod A79 are meshed with the teeth on the rotating gear A712 in the initial state. The rotating gear A712 is an incomplete gear. At the beginning, when the rotating gear A712 rotates, it will drive the gear rod A79 to move downward.

[0026] In this embodiment, when the old water in the incubator 1 needs to be replaced, new water is put into the water replacement tank 71, and disinfectant is added, and then the stirring motor 73 is turned on. The stirring motor 73 drives the stirring shaft 72 to rotate through its output shaft. The rotation of the stirring shaft 72 will drive the stirring blades to stir the new water in the water replacement tank 71, so that the new water and the disinfectant are evenly mixed to ensure the water quality. Then the rotating motor 711 is turned on. The rotating motor 711 drives the rotating shaft 710 to rotate through its output shaft. The rotation of the rotating shaft 710 drives the rotating gear A712 to rotate. At the beginning, the rotating gear A712 rotates and its teeth are engaged with the teeth on the gear rod A79, which will drive the gear rod A79 When the gear A712 moves downward, the gear rod A79 moves downward, which will drive the closing plate 78 to move downward along the sliding rod 76, and the telescopic spring 77 is compressed. The closing plate 78 moves downward, which will open the gate 6 so that the new water in the water exchange tank 71 is discharged into the breeding box 1 through the gate 6. When the rotating gear A712 rotates to the toothless part and disengages from the gear rod A79, the telescopic spring 77 rebounds and drives the closing plate 78 to move upward so that the gate 6 is closed, thereby forming a cycle. The intermittent opening of the gate 6 allows new water to intermittently enter the breeding box 1, so that new water can be added during the fry cultivation process, and the process of adding new water is slow and will not cause the fry to adapt.

[0027] Example 2 Reference Figure 1 to Figure 7, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the matching drainage mechanism 8 includes a pressure chamber 81, a bevel gear A86 and a rotating rod 87. The pressure chamber 81 is fixedly connected to the side of the incubator 1. The internal piston of the pressure chamber 81 is slidably connected to a piston plate 82. The bottom of the piston plate 82 is fixedly connected to a vertical rod 83. The surface of the vertical rod 83 is sleeved with a return spring 84. The bottom of the vertical rod 83 is fixedly connected to a gear rod B85. A water suction pipe 811 and a drainage pipe 812 are fixedly installed on both sides of the pressure chamber 81. The insides of the water suction pipe 811 and the drainage pipe 812 are both provided with a one-way valve. The one-way valve in the water suction pipe 811 The one-way valve is unidirectionally connected to the inner direction of the pressure chamber 81, and the one-way valve in the drain pipe 812 is unidirectionally connected to the outer direction of the pressure chamber 81. When negative pressure is formed in the pressure chamber 81, water in the incubator 1 will be sucked into the pressure chamber 81 through the suction pipe 811, and when the water in the pressure chamber 81 is squeezed, it will be discharged through the drain pipe 812. The bevel gear A86 is fixedly connected to the surface of the rotating shaft 710, and the rotating rod 87 passes through and is rotatably connected to the side of the incubator 1. The two ends of the rotating rod 87 are respectively fixedly connected with the bevel gear B88 and the rotating gear B89. The rotating gear B89 is an incomplete gear, and the teeth on the rotating gear B89 are in the initial state. The bevel gear A86 is meshed with the teeth on the gear rod B85. The bevel gear A86 is in a vertical meshing state with the bevel gear B88 in the initial state. When the gear B89 is rotated at the beginning, the gear rod B85 will be driven to move downward. The rotation of the bevel gear A86 will drive the bevel gear B88 to rotate. The shaking mechanism 9 includes two groups of support rods 91 and an extrusion block 96. The bottoms of the two groups of support rods 91 are fixedly connected to the inner bottom of the incubator 1. The tops of the two groups of support rods 91 are fixedly connected to the air pressure chamber 92. One end of the two groups of air pressure chambers 92 is provided with an air bag 93. The other ends of the two groups of air pressure chambers 92 are piston-slidingly connected to the piston rod 94. The tops of the two groups of piston rods 94 are fixed A push plate 95 is fixedly connected, and an extrusion block 96 is fixedly connected to the surface of the rotating shaft 710. The ends of the two groups of air bags 93 away from the air pressure chamber 92 are close to the extrusion block 96, and the two groups of air bags 93 are in an expanded state in the initial state. When the extrusion block 96 rotates with the rotating shaft 710, it will repeatedly squeeze the two groups of air bags 93 at the same time. When the air bags 93 are squeezed, the air pressure inside them will enter the air pressure chamber 92 to push the piston rod 94 to move upward. The two groups of air pressure chambers 92 are symmetrically arranged along the center line of the incubator 1, and the tops of the two groups of push plates 95 are in contact with the bottom of the filter screen 5 in the initial state. When the two groups of push plates 95 move upward at the same time, they will stably drive the filter screen 5 to move upward.

[0028] Compared with Example 1, further, when the rotating motor 711 drives the rotating shaft 710 to rotate through its output shaft, the rotating shaft 710 rotates and drives the bevel gear A86 to rotate. The rotation of the bevel gear A86 will drive the bevel gear B88 to rotate. The rotation of the bevel gear B88 drives the rotating rod 87 to rotate. The rotation of the rotating rod 87 drives the rotating gear B89 to rotate. At the beginning, when the rotating gear B89 rotates, it will drive the gear rod B85 to move downward. The gear rod B85 moves downward and drives the vertical rod 83 and the piston plate 82 to move downward. The reset spring 84 is compressed, and the downward movement of the piston plate 82 will form a negative pressure in the pressure chamber 81. The negative pressure formed in the pressure chamber 81 will absorb the water under the filter screen 5 in the incubator 1 into the pressure chamber 81 through the suction pipe 811. The filter screen 5 can block the fry, and the water under the filter screen 5 is mostly old water. When the rotating gear B89 rotates to the toothless part and disengages from the gear rod B85, the reset spring 84 rebounds and drives the piston plate 82, the vertical rod 83 and the piston plate 82. The gear rod B85 moves upward to restore. At this time, the piston plate 82 will squeeze the water in the pressure chamber 81 and discharge it through the drain pipe 812, so that the waste water in the incubator 1 is gradually discharged, thereby cooperating with the intermittent water adding mechanism 7 to replace the water in the incubator 1 as a whole, and the overall water replacement effect is better. At the same time, when the rotating shaft 710 rotates, it will drive the squeezing block 96 to rotate. The squeezing block 96 rotates and its longer two ends will repeatedly squeeze the two groups of air bags 93 at the same time. When the air bags 93 are squeezed, the air pressure inside them will enter the air pressure chamber 92 to push the piston rod 94 to move upward. The upward movement of the piston rod 94 will drive the push plate 95 to move upward. The filter screen 5 is driven to move upward by the simultaneous upward movement of the two groups of push plates 95. When the squeezing block 96 leaves the air bag 93, the air bag 93 rebounds and the air pressure returns to the air pressure chamber 92. At this time, the piston rod 94 will drive the push plate 95 to move downward to restore. The filter screen 5 is restored due to the decrease in gravity, and the impurities on the filter screen 5 fall off through the up and down shaking of the filter screen 5.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fish seedling cultivation device with water exchange and cleaning, characterized in that: The invention comprises a cultivation box (1), wherein the bottom of the cultivation box (1) is fixedly connected to a support frame (2), the inner bottom of the cultivation box (1) is fixedly connected to a limit rod (3), the surface of the limit rod (3) is sleeved with a compression spring (4), the surface of the limit rod (3) is slidably connected to a filter screen (5), a gate (6) is provided at the inner rear end of the cultivation box (1), an intermittent water adding mechanism (7) is provided at the rear end of the cultivation box (1), a matching drainage mechanism (8) is provided on the side of the cultivation box (1), and a shaking mechanism (9) is provided at the inner bottom of the cultivation box (1); The intermittent water adding mechanism (7) comprises a water changing tank (71), a hollow seat (74), a rotating shaft (710) and a rotating motor (711); the water changing tank (71) is fixedly connected to the rear end of the cultivation box (1); a stirring shaft (72) is rotatably connected to the interior of the water changing tank (71); a stirring motor (73) is fixedly mounted on the side of the water changing tank (71); the hollow seat (74) is fixedly connected to the interior of the gate (6); a slide cylinder (75) is fixedly connected to the interior of the hollow seat (74); the slide cylinder (75) A sliding rod (76) is slidably connected to the inside of the incubator (1), a telescopic spring (77) is sleeved on the surface of the sliding rod (76), a closing plate (78) is fixedly connected to the top of the sliding rod (76), a gear rod A (79) is fixedly connected to the bottom of the closing plate (78), the rotating shaft (710) penetrates and is rotatably connected to the front end of the incubator (1) and the hollow seat (74), the rotating motor (711) is fixedly mounted on the front end of the incubator (1), and a rotating gear A (712) is fixedly connected to the rear end of the rotating shaft (710).

2. The fish seedling cultivation device for water exchange and cleaning according to claim 1 is characterized in that: The output shaft of the stirring motor (73) is fixedly connected to the stirring shaft (72); a stirring blade is provided on the surface of the stirring shaft (72); and the output shaft of the rotating motor (711) is fixedly connected to the rotating shaft (710).

3. The fish seedling cultivation device for water exchange and cleaning according to claim 2 is characterized in that: In the initial state, the top of the closing plate (78) is tightly fitted with the inner top of the gate (6), and the width of the closing plate (78) is equal to the width of the gate (6).

4. The fish seedling cultivation device for water exchange and cleaning according to claim 3 is characterized in that: In an initial state, the upper teeth of the gear rod A (79) mesh with the upper teeth of the rotating gear A (712), and the rotating gear A (712) is an incomplete gear.

5. The fish seedling cultivation device for water exchange and cleaning according to claim 4 is characterized in that: The matching drainage mechanism (8) comprises a pressure chamber (81), a bevel gear A (86) and a rotating rod (87); the pressure chamber (81) is fixedly connected to the side of the incubator (1); the internal piston of the pressure chamber (81) is slidably connected to a piston plate (82); the bottom of the piston plate (82) is fixedly connected to a vertical rod (83); the surface of the vertical rod (83) is sleeved with a return spring (84); the bottom of the vertical rod (83) is fixedly connected to a gear rod B (85); a water suction pipe (811) and a drainage pipe (812) are fixedly installed on both sides of the pressure chamber (81); both the water suction pipe (811) and the drainage pipe (812) are provided with a one-way valve inside; the bevel gear A (86) is fixedly connected to the surface of the rotating shaft (710); the rotating rod (87) penetrates and is rotatably connected to the side of the incubator (1); and the two ends of the rotating rod (87) are fixedly connected to a bevel gear B (88) and a rotating gear B (89).

6. The fish seedling cultivation device for water exchange and cleaning according to claim 5, characterized in that: The rotating gear B (89) is an incomplete gear, and the upper teeth of the rotating gear B (89) are initially meshed with the upper teeth of the gear rod B (85), and the bevel gear A (86) and the bevel gear B (88) are initially in a vertical meshing state.

7. The fish seedling cultivation device for water exchange and cleaning according to claim 6 is characterized in that: The one-way valve in the water suction pipe (811) is one-way conductive toward the interior of the pressure chamber (81), and the one-way valve in the water discharge pipe (812) is one-way conductive toward the exterior of the pressure chamber (81).

8. The fish seedling cultivation device for water exchange and cleaning according to claim 7, characterized in that: The shaking mechanism (9) comprises two groups of support rods (91) and an extrusion block (96); the bottoms of the two groups of support rods (91) are fixedly connected to the inner bottom of the incubator (1); the tops of the two groups of support rods (91) are fixedly connected to a pressure chamber (92); one end of the two groups of pressure chambers (92) is provided with an air bag (93); the other ends of the two groups of pressure chambers (92) are piston-slidably connected to a piston rod (94); the tops of the two groups of piston rods (94) are fixedly connected to a push plate (95); and the extrusion block (96) is fixedly connected to the surface of the rotating shaft (710).

9. The fish seedling cultivation device for water exchange and cleaning according to claim 8, characterized in that: One end of the two groups of air bags (93) away from the air pressure chamber (92) is close to the extrusion block (96), and the two groups of air bags (93) are in an expanded state in an initial state.

10. The fish seedling cultivation device with water exchange and cleaning according to claim 9, characterized in that: The two groups of air pressure chambers (92) are symmetrically arranged about the vertical central axis of the incubator (1), and the tops of the two groups of push plates (95) are in contact with the bottom of the filter screen (5) in an initial state.

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