Environment-friendly bottom changing device and method for cultivating macrobrachium rosenbergii fry

Abstract

The application discloses an environment-friendly bottom changing device and method for cultivating Macrobrachium rosenbergii fry, and belongs to the field of shrimp culture. The environment-friendly bottom changing device for cultivating Macrobrachium rosenbergii fry comprises a supporting frame, further comprises: a floating block fixedly connected to the lower end of the supporting frame, wherein the upper end of the supporting frame is fixedly connected with a first box body, the lower end of the first box body is provided with a flat-shaped discharging port, the lower end of the discharging port extends to the lower end of the supporting frame, and the inner bottom of the first box body is provided with a discharging assembly for ejecting materials; and an auxiliary oxygen generating assembly is arranged on the supporting frame, wherein the auxiliary oxygen generating assembly is used for generating oxygen; the application can improve the bottom changing effect, avoid powder from being scattered in the air to pollute the surrounding environment, and automatically complete the powder spraying work, so that spraying is more convenient, efficient and uniform, and the bottom changing effect of the culture pond is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of shrimp farming technology, and in particular to an environmentally friendly bottom-improving device and method for cultivating giant freshwater prawn larvae. Background Technology

[0002] Shrimp farming is an industry that involves the artificial breeding and production of shrimp, a species with high economic value. Farming methods include pond culture, harbor culture, and cage culture, and polyculture methods involving fish, shrimp, and shellfish are also used. In marine shrimp, the main species farmed are the Oriental shrimp and the tiger prawn (Litopenaeus vannamei), with crayfish also farmed in southern China. In freshwater shrimp, species include the giant freshwater prawn (Macrobrachium rosenbergii).

[0003] In the farming of giant freshwater prawns, it is often necessary to carry out artificial bottom improvement work in the ponds regularly. During the bottom improvement process, lactic acid bacteria, lime powder, and potassium persulfate need to be manually sprinkled into the ponds. The sprinkling process is labor-intensive, and the powder is easily dispersed into the air, causing pollution to the surrounding air. After sprinkling, the powder floating on the water surface is difficult to settle in time, affecting the bottom improvement effect. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of inconvenience and environmental impact of manually applying bottom-improving substances in the prior art, and to propose an environmentally friendly bottom-improving device and method for cultivating giant freshwater prawn larvae.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae includes a support frame and a float fixedly connected to the lower end of the support frame. A first housing is fixedly connected to the upper end of the support frame. The lower end of the first housing has a flat discharge port, the lower end of which extends to the lower end of the support frame. The inner bottom of the first housing has a discharge assembly for ejecting material. An auxiliary oxygen-generating assembly is disposed on the support frame, wherein the auxiliary oxygen-generating assembly generates oxygen and propels the support frame to move horizontally.

[0007] In order to automatically complete the spraying of the bottom-changing powder, preferably, the discharge assembly includes a rotating shaft rotatably connected between the bottom of the first box, and a roller is fixedly installed on the outer wall of the rotating shaft. The outer wall of the roller is provided with uniformly distributed strip grooves, and the two sides of the roller are closely attached to the inner bottom of the first box. A drive motor for driving the rotating shaft to rotate is fixedly installed on the outer wall of the first box.

[0008] To further oxygenate the aquaculture pond, the auxiliary oxygenation component includes an oxygenator fixedly mounted on a support frame. A left and right spray pipe are respectively located on the lower sides of the support frame. The right spray pipe is fixedly connected to the left spray pipe via a first connecting pipe. The output end of the oxygenator is fixedly connected to the left spray pipe via a second connecting pipe. Multiple equally spaced air nozzles are fixedly installed on the outer walls of both the left and right spray pipes. The two sets of air nozzles are symmetrically arranged at the lower end of the discharge port, and both sets of air nozzles are inclined downwards. The support frame is equipped with a lifting mechanism for driving the left and right spray pipes up and down.

[0009] To further improve the discharge efficiency of the discharge port, the lifting unit includes a device frame fixedly connected to the outer wall of the first housing. A rectangular frame is slidably mounted on the device frame. Telescopic devices are fixedly mounted on both sides of the lower end of the rectangular frame. The left and right nozzles are respectively fixedly connected to the telescopic ends of the two telescopic devices. The outer wall of the first housing is provided with a reciprocating mechanism to drive the rectangular frame to move back and forth. Flat pipes inclined downwards are fixedly connected to both sides of the lower end of the discharge port. Inclined plates parallel to the two flat pipes are fixed on the left and right nozzles respectively. The two sets of air nozzles pass through the two inclined plates respectively.

[0010] To further drive the rectangular frame to reciprocate, the reciprocating mechanism includes a reciprocating screw rotatably connected to the outer wall of the first housing, and a reciprocating slide plate threaded to the outer wall of the reciprocating screw. The reciprocating slide plate is fixedly connected to the rectangular frame, and the reciprocating screw is connected to one end of the rotating shaft via a chain drive.

[0011] To facilitate the application of lactic acid bacteria, a second housing is fixedly connected to the support frame. A spray pipe is fixedly connected to the lower end of the support frame via a fixing bracket. The spray pipe is located at the lower end of the discharge port, and a spray nozzle facing the discharge port is fixedly installed on the spray pipe. A water pump is fixedly installed on the support frame, with the input end of the water pump extending into the second housing. The output end of the water pump is fixedly connected to the spray pipe via a third connecting pipe.

[0012] To prevent the bottom-modifying powder from sticking to the inner wall of the first box, the inner walls on both sides of the first box are further slidably connected with first strip rods, and strip scrapers that adhere to the inner wall of the first box are fixedly connected to the two first strip rods. One end of the first strip rod extends to the outer wall of the first box and is fixedly connected to a first vertical rod, which is fixedly connected to a rectangular frame.

[0013] To further improve the uniformity of lactic acid bacteria in the second chamber, a second strip rod extending into its cavity is slidably inserted into the outer wall of the second chamber. Multiple stirring rods are fixedly connected to the second strip rod, and a second vertical rod fixedly connected to a rectangular frame is fixedly connected to one end of the second strip rod.

[0014] To make the entire device more energy-efficient and environmentally friendly, two symmetrically arranged photovoltaic panels are fixedly installed on the support frame via mounting brackets. The two photovoltaic panels are respectively positioned above the oxygen generator and the water pump. A flat plate is fixedly installed at the lower end of each photovoltaic panel, and a storage battery is fixedly installed on the flat plate. The output end of the storage battery is electrically connected to the output ends of the oxygen generator and the water pump.

[0015] A method for improving the bottom of the shrimp bed for cultivating giant freshwater prawn larvae, the operation steps are as follows:

[0016] Step 1: In the first stage, when the shrimp larvae are 15-50 days after being introduced into the pond, apply EM bacteria or lactic acid bacteria to the entire pond once every 10 days.

[0017] Step Two: In the second stage, when the shrimp broodstock is 50-80 days old, apply 500g of potassium persulfate per acre once a week on a sunny morning. Turn on the oxygen generator when applying.

[0018] Step 3: On the morning of the second day after using potassium bisulfate, spray 3-5L of lactic acid bacteria into the entire pond;

[0019] Step 4: In the third stage, when the broodstock shrimp have been raised for 80-150 days, quicklime is sprinkled throughout the pond.

[0020] Step 5: The day after quicklime is applied to the entire pond, complete the chemical bottom improvement process, referring to Step 2 above;

[0021] Step Six: On the morning of the third day after the quicklime was sprinkled throughout the pond, complete the replenishment of bacteria throughout the pond, referring to Step Three above.

[0022] Compared with the prior art, the present invention provides an environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae, which has the following beneficial effects:

[0023] 1. This environmentally friendly bottom-improving device for raising giant freshwater prawn larvae uses a drive motor and an oxygenator to continuously churn the water, which rapidly absorbs the powder discharged from the feed outlet. This improves the bottom-improving effect and prevents the powder from scattering in the air and polluting the surrounding environment. Furthermore, the support frame moves horizontally within the pond under the exhaust of the jet nozzle on the right nozzle, automatically completing the powder spraying process without the need for manual spraying. This makes spraying more convenient, efficient, and uniform, significantly improving the bottom-improving effect of the pond.

[0024] 2. This environmentally friendly bottom-improving device for raising giant freshwater prawn larvae adds EM bacteria or lactic acid bacteria to the second tank, then turns on the water pump. The spray nozzles spray the EM bacteria or lactic acid bacteria into the water of the aquaculture pond, thus automatically completing the automatic spraying of EM bacteria or lactic acid bacteria. During the spraying process, the EM bacteria or lactic acid bacteria are directly sprayed into the water by the spray nozzles, thereby improving the efficiency of the reaction between EM bacteria or lactic acid bacteria and water, and thus improving the bottom-improving efficiency of the aquaculture pond. The air nozzles disperse the EM bacteria or lactic acid bacteria sprayed from the spray nozzles, which further improves the bottom-improving effect of the aquaculture pond.

[0025] 3. This environmentally friendly bottom-improving device for raising giant freshwater prawn larvae uses a rotating shaft to drive a reciprocating screw, which in turn causes the rectangular frame to slide back and forth in the water and on the flat tube. This increases the contact area between oxygen and water, thus improving the oxygenation effect. It also makes the powder discharged from the feed outlet more efficient and uniform. Furthermore, it can more efficiently disperse the powder, EM bacteria, or lactic acid bacteria sprinkled on the water, further enhancing the bottom-improving effect on the aquaculture pond.

[0026] 4. This environmentally friendly bottom-improving device for raising giant freshwater prawn larvae uses a rectangular frame to drive a strip scraper to slide back and forth on the inner wall of the first tank. The strip scraper can scrape off the powder on the inner wall of the first tank, preventing the powder from sticking and accumulating on the inner wall of the first tank. In addition, the rectangular frame will also drive the stirring rod to stir the EM bacteria or lactic acid bacteria in the second tank, thereby improving the uniformity of EM bacteria or lactic acid bacteria and indirectly improving the bottom-improving effect of the entire aquaculture pond. Attached Figure Description

[0027] Figure 1 This is a first-view isometric structural diagram of an environmentally friendly bottom-modifying device for cultivating giant freshwater prawn larvae proposed in this invention.

[0028] Figure 2 This is a second-view isometric structural diagram of an environmentally friendly bottom-modifying device for cultivating giant freshwater prawn larvae proposed in this invention.

[0029] Figure 3 This is a partial isometric structural diagram of an environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae proposed in this invention. Figure 1 ;

[0030] Figure 4 This is a partial isometric structural diagram of an environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae proposed in this invention. Figure 2 ;

[0031] Figure 5 This is a partial isometric structural diagram of an environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae proposed in this invention. Figure 3 ;

[0032] Figure 6 This is a schematic diagram of the roller shaft structure of an environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae proposed in this invention.

[0033] Figure 7 This is a schematic diagram of the left and right nozzles of an environmentally friendly bottom-modifying device for cultivating giant freshwater prawn larvae, as proposed in this invention.

[0034] In the diagram: 1. Support frame; 2. Float; 3. First housing; 4. Discharge port; 5. Rotating shaft; 6. Roller shaft; 7. Strip trough; 8. Drive motor; 9. Device frame; 10. Rectangular frame; 11. Telescopic device; 12. Left nozzle; 13. Right nozzle; 14. First connecting pipe; 15. Oxygen generator; 16. Second connecting pipe; 17. Inclined plate; 18. Air nozzle; 19. Flat pipe; 20. Reciprocating slide plate; 21. Chain drive; 22. Second housing; 23. Water pump; 24. Spray pipe; 25. Spray nozzle; 26. Third connecting pipe; 27. First strip rod; 28. Strip scraper; 29. ​​First vertical rod; 30. Second strip rod; 31. Stirring rod; 32. Second vertical rod; 33. Fixing frame; 34. Mounting frame; 35. Photovoltaic panel; 36. Flat plate; 37. Battery; 38. Reciprocating screw. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Example 1:

[0038] Reference Figures 1-7An environmentally friendly bottom-improving device for cultivating giant freshwater prawn larvae includes a support frame 1 and a float 2 for floating the support frame 1 on the water surface, fixedly connected to the lower end of the support frame 1. The upper end of the support frame 1 is fixedly connected to a first box 3 for storing powdered bottom-improving material. The lower end of the first box 3 has a flat discharge port 4, the lower end of which extends to the lower end of the support frame 1. The inner bottom of the first box 3 has a discharge assembly for ejecting material, including a rotating shaft 5 rotatably connected between the inner bottom of the first box 3. A roller 6 is fixedly installed on the outer wall of the rotating shaft 5, wherein the outer wall of the roller 6 has evenly distributed strip grooves 7, and the two sides of the roller 6 are tightly attached to the inner bottom of the first box 3. A drive motor 8 for driving the rotating shaft 5 to rotate is fixedly installed on the outer wall of the first box 3. An auxiliary oxygen-generating assembly is disposed on the support frame 1, wherein the auxiliary oxygen-generating assembly is used to generate oxygen and to propel the support frame 1 horizontally.

[0039] When quicklime or potassium persulfate needs to be applied, quicklime powder or potassium persulfate powder is added to the first chamber 3. Then, the drive motor 8 is started, which drives the rotating shaft 5 to rotate. The rotating shaft 5 then drives the roller 6 to rotate. The roller 6 carries the powder from the first chamber 3 to the discharge port 4 through the outer wall groove 7, and then drops it into the water of the aquaculture pond. At this time, the auxiliary oxygenation unit can carry the powder on the roller 6 out, preventing the powder from clogging and affecting the discharge efficiency, thus ensuring the discharge efficiency. The outlet 4 ensures the stability of the powder discharge and allows the support frame 1 to move horizontally within the aquaculture pond, thus automatically completing the powder spraying work without manual spraying. Spraying is more convenient, efficient, and uniform, significantly improving the bottom improvement effect of the aquaculture pond. In practice, since the aquaculture water is continuously recycled after bottom improvement, the large-scale drainage and replacement phenomenon in traditional aquaculture is eliminated, thus ensuring that the giant freshwater prawn broodstock cultivated in the pond does not carry specific pathogens (SPF), and the broodstock prawns have full and robust digestive systems and strong vitality, which is highly favored by seedling enterprises.

[0040] Example 2:

[0041] Reference Figures 1-4 as well as Figure 7 Similar to Embodiment 1, but further, a specific implementation scheme for the auxiliary oxygen generating component is disclosed.

[0042] The auxiliary oxygen generating component includes an oxygen generator 15 fixedly mounted on a support frame 1. A left nozzle 12 and a right nozzle 13 are respectively located on the lower sides of the support frame 1. The right nozzle 13 is fixedly connected to the left nozzle 12 via a first connecting pipe 14. The output end of the oxygen generator 15 is fixedly connected to the left nozzle 12 via a second connecting pipe 16. Multiple equally spaced air nozzles 18 are fixedly mounted on the outer walls of both the left nozzle 12 and the right nozzle 13. The two sets of air nozzles 18 are symmetrically arranged at the lower end of the discharge port 4, and both sets of air nozzles 18 are inclined downwards. The support frame 1 is provided with a lifting part for driving the left nozzle 12 and the right nozzle 13 to move up and down. The lifting part includes... A device frame 9 is fixedly connected to the outer wall of the first housing 3. A rectangular frame 10 is slidably installed on the device frame 9. Telescopic devices 11 are fixedly installed on both sides of the lower end of the rectangular frame 10. The telescopic devices 11 are electric telescopic rods. The left nozzle 12 and the right nozzle 13 are fixedly connected to the telescopic ends of the two telescopic devices 11 respectively. The outer wall of the first housing 3 is provided with a reciprocating mechanism that drives the rectangular frame 10 to move back and forth. Flat pipes 19 that are inclined downward are fixedly connected to both sides of the lower end of the discharge port 4. Inclined plates 17 that are parallel to the two flat pipes 19 are fixed on the left nozzle 12 and the right nozzle 13 respectively. Two sets of air nozzles 18 pass through the two inclined plates 17 respectively.

[0043] When oxygenation is needed in the aquaculture pond, the oxygen generator 15 is turned on. The oxygen generator 15 will supply air to the left nozzle 12 through the second connecting pipe 16. The left nozzle 12 will supply oxygen to the right nozzle 13 through the first connecting pipe 14. The air nozzles 18 on the left nozzle 12 and the right nozzle 13 will spray air towards the water surface. The water will continuously roll under the action of the air jet, thereby achieving the work of pressurizing the water body. When sprinkling quicklime or potassium persulfate, the oxygen generator 15 is turned on, and then the telescopic device 11 will drive the left nozzle 12 to move upward until the left nozzle 12 drives the inclined plate 17 to align with the flat pipe 19 on the left side. Then the air sprayed by the air nozzle 18 on the left nozzle 12 will enter the discharge port 4 and then be discharged from the lower end of the discharge port 4. When the discharge port 4 is venting, a negative pressure is generated in the discharge port 4, thereby carrying out the powder on the roller 6, preventing the powder from clogging and affecting the discharge efficiency, and thus ensuring the stability of the powder discharged from the discharge port 4.

[0044] When the right nozzle 13 exhausts air through the nozzle 18, the continuously churning water will quickly absorb the powder discharged from the discharge port 4. This improves the bottom improvement effect and prevents the powder from being dispersed in the air and polluting the surrounding environment. Furthermore, only the nozzle 18 of the right nozzle 13 exhausts air at an angle, while the nozzle 18 on the left nozzle 12 exhausts air downwards due to the discharge port 4. As a result, the support frame 1 will move horizontally in the aquaculture pond under the action of the exhaust air from the nozzle 18 on the right nozzle 13, thus automatically completing the powder spraying work without the need for manual spraying. Spraying is more convenient, efficient, and uniform, significantly improving the bottom improvement effect of the aquaculture pond. When the support frame 1 needs to move horizontally to the other side, the right nozzle 13 can be moved upwards by the telescopic device 11 to align with the flat pipe 19 on the right side.

[0045] Example 3:

[0046] Reference Figures 1-6 Similar to Example 2, but further, a specific implementation plan for the reciprocating mechanism is disclosed.

[0047] The reciprocating mechanism includes a reciprocating screw 38 rotatably connected to the outer wall of the first housing 3. The outer wall of the reciprocating screw 38 is threaded with a reciprocating slide plate 20. The reciprocating slide plate 20 is fixedly connected to the rectangular frame 10. The reciprocating screw 38 is connected to one end of the rotating shaft 5 through a chain drive 21.

[0048] When the rotating shaft 5 rotates, the rotating shaft 5 will drive the reciprocating screw 38 to rotate through the chain drive 21. The reciprocating screw 38 will drive the reciprocating slide plate 20 to slide back and forth. The reciprocating slide plate 20 will drive the rectangular frame 10 to slide back and forth on the device frame 9. The rectangular frame 10 will drive the left nozzle 12 and the right nozzle 13 to slide back and forth through the telescopic device 11, thereby driving the jet nozzle 18 to slide back and forth in the water and on the flat pipe 19. On the one hand, it can increase the contact area between oxygen and water to improve the oxygenation effect. On the other hand, it can make the powder discharged from the discharge port 4 more efficient and uniform.

[0049] Example 4:

[0050] Reference Figures 1-5 Similar to Example 3, but with a further detail, a specific implementation plan for spraying lactic acid bacteria is disclosed.

[0051] A second box 22 for storing EM bacteria or lactic acid bacteria is fixedly connected to the support frame 1. A spray pipe 24 is fixedly connected to the lower end of the support frame 1 through a fixing frame 33. The spray pipe 24 is located at the lower end of the discharge port 4. A spray nozzle 25 facing the discharge port 4 is fixedly installed on the spray pipe 24. A water pump 23 is fixedly installed on the support frame 1. The input end of the water pump 23 extends into the second box 22. The output end of the water pump 23 is fixedly connected to the spray pipe 24 through a third connecting pipe 26.

[0052] When it is necessary to spray EM bacteria or lactic acid bacteria into the aquaculture pond, add EM bacteria or lactic acid bacteria into the second tank 22, then turn on the water pump 23. The water pump 23 will transport the EM bacteria or lactic acid bacteria in the second tank 22 to the spray pipe 24 through the third connecting pipe 26. The spray pipe 24 will then spray the EM bacteria or lactic acid bacteria into the water of the aquaculture pond through the upper spray nozzle 25. At this time, the horizontal movement of the support frame 1 is achieved in the same way as described above, thereby automatically completing the automatic spraying of EM bacteria or lactic acid bacteria. During the spraying process, EM bacteria or... Lactic acid bacteria are directly sprayed into the water by the spray nozzle 25, thereby improving the efficiency of the reaction between EM bacteria or lactic acid bacteria and the water, and thus improving the bottom improvement efficiency of the aquaculture pond. When the air jet nozzle 18 sprays air, it will also disperse the EM bacteria or lactic acid bacteria sprayed by the spray nozzle 25, which can further improve the bottom improvement effect of the aquaculture pond. When the air jet nozzle 18 slides back and forth in the water and on the flat pipe 19, it can make the powder and EM bacteria or lactic acid bacteria sprinkled on the water more efficiently dispersed, further improving the bottom improvement effect of the aquaculture pond.

[0053] Both sides of the inner wall of the first box 3 are slidably connected with a first strip rod 27. Each of the two first strip rods 27 is fixedly connected with a strip scraper 28 that adheres to the inner wall of the first box 3. One end of the first strip rod 27 extends to the outer wall of the first box 3 and is fixedly connected with a first vertical rod 29. The first vertical rod 29 is fixedly connected to the rectangular frame 10.

[0054] As the rectangular frame 10 slides back and forth, it also drives the first strip rod 27 to slide on the inner wall of the first box 3. The first strip rod 27 drives the strip scraper 28 to slide back and forth on the inner wall of the first box 3. The strip scraper 28 can scrape off the powder on the inner wall of the first box 3, preventing the powder from adhering and accumulating on the inner wall of the first box 3.

[0055] The outer wall of the second box 22 is slidably inserted with a second strip rod 30 extending into its cavity. Multiple stirring rods 31 are fixedly connected to the second strip rod 30. One end of the second strip rod 30 is fixedly connected to a second vertical rod 32 that is fixedly connected to the rectangular frame 10.

[0056] As the rectangular frame 10 slides back and forth, it also drives the second strip rod 30 and the stirring rod 31 to move back and forth within the second box 22. The stirring rod 31 can stir the EM bacteria or lactic acid bacteria in the second box 22, thereby improving the uniformity of EM bacteria or lactic acid bacteria and indirectly improving the overall bottom improvement effect of the aquaculture pond.

[0057] Example 5:

[0058] Reference Figures 1-3 Similar to Embodiment 4, but further, a specific implementation scheme is disclosed that adds power supply to the entire device.

[0059] Two symmetrically arranged photovoltaic panels 35 are fixedly installed on the support frame 1 via mounting bracket 34. The two photovoltaic panels 35 are respectively located at the upper ends of the oxygen generator 15 and the water pump 23. A flat plate 36 is fixedly installed at the lower end of the photovoltaic panel 35, and a storage battery 37 is fixedly installed on the flat plate 36. The photovoltaic panel 35 can charge the storage battery 37 through sunlight. The output end of the storage battery 37 is electrically connected to the output ends of the oxygen generator 15 and the water pump 23.

[0060] The photovoltaic panel 35 can charge the battery 37 through sunlight, and the battery 37 can power the electrical equipment of the entire device, making the use of the entire device more environmentally friendly. In addition, the two photovoltaic panels 35 can also block sunlight from the oxygen generator 15 and the water pump 23 to reduce the high temperature damage caused by sunlight to the oxygen generator 15 and the water pump 23.

[0061] A method for improving the bottom of the shrimp bed for cultivating giant freshwater prawn larvae, the operation steps are as follows:

[0062] Step 1: In the first stage, when the shrimp larvae are 15-50 days after being introduced into the pond, apply EM bacteria or lactic acid bacteria to the entire pond once every 10 days.

[0063] Step Two: In the second stage, when the shrimp broodstock is 50-80 days old, apply 500g of potassium persulfate per acre once a week on a sunny morning. When applying, turn on the oxygen generator at 15°C.

[0064] Step 3: On the morning of the second day after using potassium bisulfate, spray 3-5L of lactic acid bacteria into the entire pond;

[0065] Step 4: In the third stage, when the broodstock shrimp have been raised for 80-150 days, quicklime is sprinkled throughout the pond.

[0066] Step 5: The day after quicklime is applied to the entire pond, complete the chemical bottom improvement process, referring to Step 2 above;

[0067] Step Six: On the morning of the third day after the quicklime was sprinkled throughout the pond, complete the replenishment of bacteria throughout the pond, referring to Step Three above.

[0068] This environmentally friendly bottom-improving device for raising giant freshwater prawn larvae involves placing the entire device into the pond. The support frame 1 floats in the water via floats 2, and the left nozzle 12, right nozzle 13, and spray pipe 24 are completely submerged. Then, the aerator 15 is turned on, and it supplies air to the left nozzle 12 through the second connecting pipe 16. The left nozzle 12 supplies oxygen to the right nozzle 13 through the first connecting pipe 14. The nozzles 18 on both the left and right nozzles 12 spray air towards the water surface, causing the water to tumble continuously under the action of the air jets, thus pressurizing the water.

[0069] When quicklime or potassium persulfate needs to be applied, quicklime powder or potassium persulfate powder is added to the first chamber 3. Then, the drive motor 8 is started, which drives the rotating shaft 5 to rotate. The rotating shaft 5 then drives the roller shaft 6 to rotate. The roller shaft 6 carries the powder from the first chamber 3 to the discharge port 4 through the outer wall groove 7, and then the powder falls from the discharge port 4 into the water of the pond. At the same time, the aerator 15 is turned on, and the telescopic device 11 drives the left nozzle 12 to move upward until the left nozzle 12 drives the inclined plate 17 to align with the flat pipe 19 on the left side. Then, the air sprayed from the nozzle 18 on the left nozzle 12 enters the discharge port 4 and is discharged from the lower end of the discharge port 4. When the discharge port 4 is venting air, a negative pressure is generated inside the discharge port 4, thereby carrying out the powder on the roller shaft 6 and preventing the powder from clogging and affecting the discharge efficiency. This ensures the stability of the powder discharged from the discharge port 4. When the right nozzle 13 exhausts air through the nozzle 18, the continuously churning water will quickly absorb the powder discharged from the discharge port 4. This improves the bottom improvement effect and prevents the powder from being dispersed in the air and polluting the surrounding environment. Furthermore, only the nozzle 18 of the right nozzle 13 exhausts air at an angle, while the nozzle 18 on the left nozzle 12 exhausts air downwards because of the discharge port 4. As a result, the support frame 1 will move horizontally in the aquaculture pond under the action of the exhaust from the nozzle 18 on the right nozzle 13, thus automatically completing the powder spraying work without manual spraying. Spraying is more convenient, efficient, and uniform, significantly improving the bottom improvement effect of the aquaculture pond. When the support frame 1 needs to move horizontally to the other side, the right nozzle 13 can be moved upwards by the telescopic device 11 to align with the flat pipe 19 on the right side.

[0070] When it is necessary to spray EM bacteria or lactic acid bacteria into the aquaculture pond, add EM bacteria or lactic acid bacteria into the second tank 22, and then turn on the water pump 23. The water pump 23 will transport the EM bacteria or lactic acid bacteria in the second tank 22 to the spray pipe 24 through the third connecting pipe 26. The spray pipe 24 will then spray into the water of the aquaculture pond through the upper spray nozzle 25. At this time, the horizontal movement of the support frame 1 is realized in the same way as above, thereby automatically completing the automatic spraying of EM bacteria or lactic acid bacteria. During the spraying process, EM bacteria or lactic acid bacteria are directly sprayed into the water by the spray nozzle 25, thereby improving the efficiency of the reaction between EM bacteria or lactic acid bacteria and water, and thus improving the bottom improvement efficiency of the aquaculture pond. When the air jet nozzle 18 sprays air, it will also disperse the EM bacteria or lactic acid bacteria sprayed by the spray nozzle 25, which can further improve the bottom improvement effect of the aquaculture pond.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly bottom changing device for cultivating Macrobrachium rosenbergii fry, comprising a support frame (1), characterized in that, Also include: The buoy (2) is fixedly connected to the lower end of the support frame (1), Wherein, the upper end of the support frame (1) is fixedly connected with the first box (3), the lower end of the first box (3) is provided with a flat discharge port (4), the lower end of the discharge port (4) extends to the lower end of the support frame (1), the inner bottom of the first box (3) is provided with a discharge assembly for ejecting material; Auxiliary oxygen generating assembly, arranged on the support frame (1), Wherein, the auxiliary oxygen generating assembly is used for generating oxygen and pushing the support frame (1) to move horizontally; the discharge assembly comprises a rotating shaft (5) rotatably connected between the inner bottom of the first box (3), and a roller shaft (6) is fixedly installed on the outer wall of the rotating shaft (5), Wherein, the outer wall of the roller shaft (6) is provided with uniformly distributed strip grooves (7), the two sides of the roller shaft (6) are tightly attached to the two sides of the inner bottom of the first box (3), and the outer wall of the first box (3) is fixedly installed with a driving motor (8) for driving the rotating shaft (5) to rotate; the auxiliary oxygen generating assembly comprises an oxygen generator (15) fixedly installed on the support frame (1), and the lower end of the support frame (1) is provided with a left nozzle (12) and a right nozzle (13) respectively, Wherein, the right nozzle (13) is fixedly connected with the left nozzle (12) through a first connecting pipe (14), the output end of the oxygen generator (15) is fixedly connected with the left nozzle (12) through a second connecting pipe (16), and a plurality of equally spaced jet nozzles (18) are fixedly installed on the outer walls of the left nozzle (12) and the right nozzle (13), two groups of the jet nozzles (18) are symmetrically arranged at the lower end of the discharge port (4), and two groups of the jet nozzles (18) are both downwardly inclined, the support frame (1) is provided with a lifting part for driving the left nozzle (12) and the right nozzle (13) to move up and down; the lifting part comprises a device frame (9) fixedly connected to the outer wall of the first box (3), Wherein, the lower end of the rectangular frame (10) is fixedly installed with a telescopic device (11), the left nozzle (12) and the right nozzle (13) are fixedly connected to the telescopic ends of the two telescopic devices (11) respectively, the outer wall of the first box (3) is provided with a reciprocating mechanism for driving the rectangular frame (10) to move reciprocally, and the lower end of the discharge port (4) is fixedly connected with a flat tube (19) which is downwardly inclined; The left nozzle (12) and the right nozzle (13) are both fixedly provided with inclined plates (17) parallel to the two flat tubes (19) respectively, two groups of the jet nozzles (18) penetrate through the two inclined plates (17), the inner walls of the two sides of the first box (3) are both slidingly connected with a first strip rod (27), and the first strip rod (27) is fixedly connected with a strip scraper (28) which is attached to the inner wall of the first box (3), the strip scraper (28) is reciprocally slid on the inner wall of the first box (3) by the rectangular frame (10), and the strip scraper (28) can scrape off the powder on the inner wall of the first box (3); The reciprocating mechanism comprises a reciprocating screw rod (38) rotatably connected to the outer wall of the first box (3), and the outer wall of the reciprocating screw rod (38) is threadedly connected with a reciprocating sliding plate (20), Wherein, the reciprocating sliding plate (20) is fixedly connected with the rectangular frame (10), and the reciprocating screw rod (38) is connected with one end of the rotating shaft (5) through chain transmission (21).

2. The improved bottom device for environmentally friendly culture of Macrobrachium rosenbergii fry according to claim 1, characterized in that, The support frame (1) is fixedly connected with a second box (22), the lower end of the support frame (1) is fixedly connected with a liquid spraying pipe (24) through a fixing frame (33), the liquid spraying pipe (24) is arranged at the lower end of the discharge port (4), and the liquid spraying pipe (24) is fixedly provided with a liquid spraying nozzle (25) facing the discharge port (4), Wherein, the support frame (1) is fixedly provided with a water pump (23), the input end of the water pump (23) extends into the second box (22), and the output end of the water pump (23) is fixedly connected with the liquid spraying pipe (24) through a third connecting pipe (26).

3. The improved bottom device for environmentally friendly culture of Macrobrachium rosenbergii fry according to claim 1, characterized in that, One end of the first bar (27) extends to the outer wall of the first box (3) and is fixedly connected with a first vertical rod (29), and the first vertical rod (29) is fixedly connected to the rectangular frame (10).

4. The improved bottom device for environmentally friendly culture of Macrobrachium rosenbergii fry according to claim 2, characterized in that, The outer wall of the second box (22) is slidably inserted with a second bar (30) extending into the cavity thereof, a plurality of stirring rods (31) are fixedly connected to the second bar (30), and one end of the second bar (30) is fixedly connected with a second vertical rod (32) fixedly connected with the rectangular frame (10).

5. The improved bottom device for environmentally friendly culture of Macrobrachium rosenbergii fry according to claim 2, characterized in that, The support frame (1) is fixedly provided with two symmetrical photovoltaic panels (35) through a mounting frame (34), and the two photovoltaic panels (35) are arranged at the upper ends of the oxygen generator (15) and the water pump (23) respectively, Wherein, the lower end of the photovoltaic panel (35) is fixedly provided with a flat plate (36), the flat plate (36) is fixedly provided with a storage battery (37), and the output end of the storage battery (37) is electrically connected with the output ends of the oxygen generator (15) and the water pump (23).

6. A method for cultivating Macrobrachium rosenbergii fry using the environmentally friendly bottom modification device for cultivating Macrobrachium rosenbergii fry according to any one of claims 1 to 5, characterized in that, The operation steps are as follows: Step one: in the first stage, when the shrimp fry is in the pond for 15-50 days, EM bacteria or lactic acid bacteria are used for full pond spraying, once every 10 days; Step two: in the second stage, when the breeding of the shrimp fry is carried out for 50-80 days, 500g of potassium peroxymonosulfate is used once a week per mu, and the oxygen generator (15) is turned on in the morning on a sunny day; Step three: on the second day after the use of potassium peroxymonosulfate, lactic acid bacteria 3L-5L are used for full pond spraying in the morning; Step four: in the third stage, when the breeding of the shrimp fry is carried out for 80-150 days, quicklime is used for full pond spraying; Step five: on the second day after the full pond spraying of quicklime, chemical bottom improvement is completed, and the above step two is referred to; Step six: on the third day after the full pond spraying of quicklime, full pond bacteria supplementing is completed, and the above step three is referred to.

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