Bottom water purification and oxygenation device for land-based barrel mandarin fish feed culture

Abstract

The utility model relates to the technical field of aquaculture, and discloses a land-based bucket bottom water purification and oxygenation device for feed culture of mandarin fish, which comprises a land-based bucket body for feed culture of mandarin fish, and further comprises a suction assembly arranged on the inner side of the land-based bucket body; the oxygenation pipeline is arranged on the suction assembly, the suction assembly is used for pumping bottom water in the land-based barrel body, and then the bottom water flows into the land-based barrel body from the high position through the oxygenation pipeline so as to conduct oxygenation on the water in the land-based barrel body; the sewage filtering part is arranged on the suction assembly, is located between the oxygenation pipeline and the land-based barrel body and is used for collecting sewage flowing out of the oxygenation pipeline so as to purify water in the land-based barrel body. The bottom water purification and oxygenation device for land-based barrel mandarin fish feed culture aims at solving the problems that in existing land-based barrel mandarin fish feed culture, oxygen supply is not uniform, noise interference is caused, and water purification is insufficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aquaculture technology, concretely to a bottom water purification oxygenation device for land-based mandarin fish feed culture. BACKGROUND

[0002] Land-based mandarin fish feed culture is a kind of efficient culture mode, it utilizes the facilities on land to breed, can save a large amount of land resources, realizes high-density culture simultaneously, improves the culture benefit, in the culture process, high-quality mandarin fish special soft granular feed is selected, and seedling domestication is carried out through land-based round barrel, gradually transits from live bait to soft granular feed, ensures the adaptability and feeding rate of fry to feed, and water quality management is the key, needs to keep dissolved oxygen at the appropriate level for a long time, and regularly monitors water quality indexes, adjusts feeding amount and uses biological preparation in time, in the aspect of disease management, prevention should be strengthened, and appropriate amount of Chinese herbal medicine, immune enhancer and the like with preventive effect is fed, and diseases are found and handled in time, compared with traditional bait fish culture, feed mandarin fish culture is lower in cost and higher in benefit, and the feed source is stable, and the sanitary quality is good.

[0003] In the land-based barrel oxygen supply technology for existing mandarin fish culture, an oxygen supply machine is generally used for oxygen supply, although this mode meets the demand of mandarin fish for oxygen to some extent, but has the following defects:

[0004] Firstly, the oxygen supply mode of the oxygen supply machine is relatively single, mainly injects oxygen into the water body in the form of bubbles, but this mode often leads to uneven distribution of oxygen, excess oxygen in some areas, and possible oxygen deficiency in some areas, affecting the growth and health of mandarin fish;

[0005] Secondly, the oxygen supply machine generates a large noise in the running process, which causes disturbance to the growth environment of mandarin fish, and even may cause stress reaction of mandarin fish, reducing its immunity and growth speed;

[0006] In addition, the existing oxygen supply mode does not consider purifying the water in the land-based barrel while supplying oxygen, and harmful substances such as organic matter and ammonia nitrogen will gradually accumulate in the water body with the extension of culture time, if not purified in time, will cause serious pollution to the growth environment of mandarin fish, and further affect its growth performance and product quality. INVENTION CONTENTS

[0007] The utility model aims at solving the problems of uneven oxygen supply, noise disturbance and insufficient water quality purification in the existing land-based barrel mandarin fish feed culture, and provides a bottom water purification oxygenation device for land-based barrel mandarin fish feed culture.

[0008] The technical scheme for solving the above technical problems of the utility model is as follows:

[0009] The utility model provides a kind of bottom water purification oxygenation device for land-based mandarin fish feed culture, including the land-based barrel body for feed culture mandarin fish, also includes:

[0010] Suction assembly is arranged in the inside of land-based barrel body;

[0011] Oxygenation pipeline is arranged on suction assembly, wherein suction assembly is used to extract bottom water in land-based barrel body, and then oxygenation pipeline flows from high place to land-based barrel body, to carry out oxygenation to water in land-based barrel body;

[0012] Sewage filter is arranged on suction assembly, wherein sewage filter is located between oxygenation pipeline and land-based barrel body, and it is used to collect sewage flowing from oxygenation pipeline, to carry out purification to water in land-based barrel body.

[0013] On the basis of the above technical solutions, the utility model can also be improved as follows.

[0014] Further, the suction assembly includes:

[0015] Submersible pump is placed in water body in land-based barrel body;And

[0016] Output pipeline is arranged on the water outlet end of submersible pump and is interconnected with the water outlet end of submersible pump.

[0017] Further, the oxygenation pipeline includes:

[0018] Straight pipe is fixedly installed on the end of output pipeline and is interconnected between output pipeline, wherein straight pipe and output pipeline are vertically arranged;

[0019] Equidistant partition plate is fixedly installed on the inside of straight pipe;And

[0020] Water outlet hole is arranged on the surface of straight pipe, and a plurality of equidistant arrangements are arranged on the surface of straight pipe.

[0021] Further, the sewage filter includes:

[0022] Mounting seat is fixedly installed on the outside of output pipeline;

[0023] Rectangular frame, wherein one end is fixedly connected with the outside of mounting seat;And

[0024] Filter screen is detachably connected to the inside of rectangular frame, wherein filter screen and straight pipe are vertically arranged, and water outlet hole is aligned with filter screen.

[0025] Further, the inside of rectangular frame is fixedly installed with convex strip, the filter screen is placed in the inside of rectangular frame, and one side surface of filter screen is in contact with convex strip.

[0026] Further, the rectangular frame is fixedly installed with a stable support leg away from one end of the base, and the other end of the stable support leg is supported outside the land-based barrel body.

[0027] Further, the rectangular frame is fixedly installed with a stable support leg away from one end of the base, and the other end of the stable support leg is supported outside the land-based barrel body.

[0028] Compared with the prior art, the technical scheme has the following beneficial technical effects:

[0029] The utility model discloses a combination of suction assembly and oxygenation pipeline, which realizes oxygenation by extracting water from the bottom and spraying from a high place. This method can effectively increase the oxygen content in the water body, ensure the uniform distribution of oxygen in the whole land-based barrel body, avoid the situation of oxygen excess in some areas and oxygen deficiency in some areas, optimize the growth environment of mandarin fish, and improve its growth speed and health level. Secondly, the device adopts a more silent suction and spraying method to reduce the noise generated by mechanical operation, provides a more quiet growth environment for the mandarin fish, helps to reduce its stress response, improve its immunity and growth speed. Furthermore, the device is provided with a dirt filter on the suction assembly, which can effectively collect and filter the dirt flowing out of the oxygenation pipeline, realize the preliminary purification of the water body, help to maintain the freshness of the water quality, reduce the accumulation of harmful substances such as organic matter and ammonia nitrogen in the water body, and reduce the risk of water pollution, thereby further improving the growth performance and product quality of the mandarin fish. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall connection structure of the utility model;

[0031] Figure 2 It is a schematic diagram of the connection structure of the suction assembly and the oxygenation pipeline of the utility model;

[0032] Figure 3 It is a schematic diagram of the connection structure of the straight pipe and the equal division plate of the utility model;

[0033] Figure 4 It is a schematic diagram of the connection structure of the straight pipe and the water outlet hole of the utility model;

[0034] Figure 5 It is a schematic diagram of the connection structure of the output pipeline and the dirt filter of the utility model;

[0035] Figure 6 It is an exploded connection structure schematic diagram of the rectangular frame and the convex strip box filter screen of the utility model.

[0036] As shown in the figure: 1, land-based barrel barrel body; 2, suction assembly; 21, submersible pump; 22, output pipe; 3, oxygenation pipe; 31, straight pipe; 32, even partition plate; 33, water outlet hole; 4, dirt filter; 41, mounting seat; 42, rectangular frame; 43, filter screen; 5, convex strip; 6, stable support leg. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0038] In combination with Figures 1-6 As shown in the figure, the utility model discloses a land-based barrel bottom water purification oxygenation device for mandarin fish feed culture, which comprises a land-based barrel barrel body 1 for feed culture of mandarin fish, and further comprises:

[0039] A suction assembly 2 is arranged on the inner side of the land-based barrel barrel body 1.

[0040] An oxygenation pipe 3 is arranged on the suction assembly 2, wherein the suction assembly 2 is used to extract the bottom water in the land-based barrel barrel body 1, and then the bottom water flows into the land-based barrel barrel body 1 from a high place through the oxygenation pipe 3, so as to oxygenate the water in the land-based barrel barrel body 1.

[0041] A dirt filter 4 is arranged on the suction assembly 2, wherein the dirt filter 4 is located between the oxygenation pipe 3 and the land-based barrel barrel body 1, and is used to collect the dirt flowing out of the oxygenation pipe 3, so as to purify the water in the land-based barrel barrel body 1.

[0042] First, the suction assembly 2 is arranged in the inner side of the land-based barrel barrel body 1, which is used to extract the accumulated water in the bottom of the land-based barrel barrel body 1, which may contain more harmful substances such as organic matter, ammonia nitrogen and suspended dirt particles. After the suction assembly 2 is started, the bottom water is sucked into the oxygenation pipeline 3 arranged above the suction assembly 2 by using the negative pressure principle. When the bottom water flows through the inside of the oxygenation pipeline 3, the water flow is sprayed from the high position of the pipeline under the action of gravity. In this process, the water flow is fully mixed with the oxygen in the air, thereby increasing the dissolved oxygen content in the water body. The water body after oxygenation is then flowed back into the land-based barrel barrel body 1, thereby providing sufficient oxygen supply for the mandarin fish. In order to realize the purification of the water body, the device is further provided with a dirt filter 4 on the suction assembly 2. The dirt filter 4 is arranged between the oxygenation pipeline 3 and the land-based barrel barrel body 1, which is used to collect the dirt flowing out of the oxygenation pipeline 3. When the bottom water is oxygenated through the oxygenation pipeline 3, the suspended particles and larger dirt in the bottom water are intercepted and collected by the dirt filter 4, and the relatively clean water body continues to flow back into the land-based barrel barrel body 1. In this way, the device realizes the purification of the water body in the land-based barrel barrel body 1 through the filtering effect of the dirt filter 4.

[0043] The device can be further configured as shown in Figure 1 、 Figure 2 in a preferred embodiment of the present application; the suction assembly 2 comprises:

[0044] a submersible pump 21 arranged in the water body in the land-based barrel barrel body 1; and

[0045] an output pipeline 22 arranged on the water outlet end of the submersible pump 21 and in communication with the water outlet end of the submersible pump 21. The submersible pump 21 is the power source of the entire suction assembly 2. It is directly arranged in the water body in the land-based barrel barrel body 1, especially in the bottom region, so as to more effectively extract the bottom water containing more dirt and harmful substances. When the submersible pump 21 is started, the motor inside the submersible pump 21 drives the impeller to rotate, thereby generating negative pressure to suck the surrounding water into the pump. Since the submersible pump 21 is located at the bottom, it can ensure that the bottom water which needs to be purified and oxygenated is extracted. The output pipeline 22 is arranged on the water outlet end of the submersible pump 21 and in communication with the water outlet end of the submersible pump 21. The bottom water extracted by the submersible pump 21 is discharged through the water outlet end after being treated inside, and is transported to the oxygenation pipeline 3 along the output pipeline 22. The design of the output pipeline 22 ensures that the bottom water can smoothly and efficiently flow to the oxygenation pipeline 3, thereby providing necessary conditions for the subsequent oxygenation and purification process.

[0046] The device can be further configured as shown in Figure 3 、 Figure 4 in a preferred embodiment of the present application; the oxygenation pipeline 3 comprises:

[0047] A straight pipe 31 is fixedly installed on the end of the output pipe 22 and communicates with the output pipe 22, wherein the straight pipe 31 and the output pipe 22 are perpendicular to each other;

[0048] A uniform partition plate 32 is fixedly installed on the inner side of the straight pipe 31; and

[0049] A water outlet hole 33 is arranged on the surface of the straight pipe 31, and a plurality of water outlet holes 33 are arranged on the surface of the straight pipe 31 at equal intervals, the straight pipe 31 is fixedly installed on the end of the output pipe 22 and communicates with the output pipe 22, and the perpendicular arrangement mode enables the bottom water flowing out of the output pipe 22 to smoothly enter the straight pipe 31 and be subjected to subsequent oxygenation treatment, the design of the straight pipe 31 not only ensures the smoothness of the water flow but also provides necessary space for the subsequent oxygenation process, the uniform partition plate 32 is fixedly installed on the inner side of the straight pipe 31 and evenly distributes the water in the straight pipe 31 to each water outlet hole 33, when the bottom water enters the straight pipe 31 from the output pipe 22, the uniform partition plate 32 blocks and disperses the bottom water, so that the water flow uniformly flows to each part of the straight pipe 31, so that when the water flow is sprayed from the water outlet hole 33, a more uniform oxygenation effect can be achieved, and the problem of uneven distribution of oxygen is avoided, the water outlet hole 33 is arranged on the surface of the straight pipe 31, and a plurality of water outlet holes 33 are arranged on the surface of the straight pipe 31 at equal intervals, which enables the water flow sprayed from the water outlet hole 33 to form more fine water mist, thereby increasing the contact area between the water body and the air and improving the oxygen dissolution efficiency, and the equidistant arrangement of the water outlet holes 33 also ensures the uniform distribution of the water flow on the entire length of the straight pipe 31, thereby further enhancing the oxygenation effect.

[0050] The utility model discloses in a preferred embodiment can be further configured as: as shown in Figure 1 、 Figure 5 The dirt filtering element 4 comprises:

[0051] A mounting seat 41 is fixedly installed on the outer side of the output pipe 22;

[0052] A rectangular frame 42, one end of which is fixedly connected with the outer side of the mounting seat 41; and

[0053] The filter screen 43 is detachably connected to the inner side of the rectangular frame 42, wherein the filter screen 43 is arranged in parallel with the straight pipe 31, and the water outlet hole 33 is aligned with the filter screen 43. The dirt filtering element 4 is an important component of the bottom water purification and oxygenation device, and its main function is to further purify the bottom water extracted from the suction assembly 2 and subjected to oxygenation treatment to remove suspended particles, organic matter and other dirt. The mounting seat 41 is fixedly installed on the outer side of the output pipe 22 and serves as a support structure for the dirt filtering element 4, which ensures the stability and reliability of the entire filtering assembly. One end of the rectangular frame 42 is fixedly connected to the outer side of the mounting seat 41, forming the main frame of the dirt filtering element 4. The design of the rectangular frame 42 not only provides installation space for the filter screen 43, but also ensures smooth water flow through the filter screen 43 for filtration. The material and structure of the rectangular frame 42 are optimized to withstand the impact of water flow and the accumulation of dirt while maintaining sufficient strength and durability. The filter screen 43 is detachably connected to the inner side of the rectangular frame 42 and serves as the core component of the dirt filtering element 4, which undertakes the main filtering task. The filter screen 43 is arranged in parallel with the straight pipe 31, ensuring that the water outlet hole 33 is aligned with the filter screen 43. When the bottom water subjected to oxygenation treatment is sprayed from the water outlet hole 33, it will first pass through the filter screen 43 for filtration. The pore size of the filter screen 43 is carefully selected to remove suspended particles, organic matter and other dirt from the water flow while allowing clean water flow. During the filtration process, dirt is intercepted by the filter screen 43 and accumulates on it. As the filtration time increases, the dirt on the filter screen 43 will gradually increase, affecting the filtration effect and water flow speed. At this time, the operator can easily detach the filter screen 43 for cleaning or replacement to ensure the continuous and efficient operation of the dirt filtering element 4.

[0054] The utility model discloses in a preferable embodiment can be further configured as: Figure 5 , Figure 6As shown; a raised strip 5 is fixedly installed on the inner side of the rectangular frame 42. The filter screen 43 is placed inside the rectangular frame 42, and one side surface of the filter screen 43 is in contact with the raised strip 5. The rectangular frame 42, as the main frame of the dirt filter element 4, not only provides installation space for the filter screen 43, but also effectively defines the position of the filter screen 43 through the raised strip 5 fixedly installed on its inner side. The raised strip 5 is fixedly installed inside the rectangular frame 42, and its shape and size are carefully designed to ensure close contact with one side surface of the filter screen 43. This contact not only helps to prevent the filter screen 43 from shifting or falling off during the filtration process, but also enhances the stability and durability of the filter screen 43 through physical support. The filter screen 43 is placed inside the rectangular frame 42 and is in contact with the raised strip 5. This placement connection method is not only simple and easy to implement, but also ensures the connection between the filter screen 43 and the rectangular frame 42. The close cooperation effectively prevents water from flowing directly out of the filter screen 43, which would affect the filtration effect. During the filtration process, the bottom water, after being oxygenated, is sprayed out from the outlet 33 and first passes through the filter screen 43 for filtration. The pore size of the filter screen 43 is carefully selected to remove suspended particles, organic matter, and other impurities from the water flow, such as mandarin fish feces and leftover feed. These impurities are intercepted by the filter screen 43 and accumulate on it, while the clean water continues to flow into the land-based tank 1 through the filter screen 43. Over time, the impurities on the filter screen 43 will gradually increase, affecting the filtration effect and water flow speed. At this time, the operator can easily remove the filter screen 43 from the rectangular frame 42 for cleaning. Since the filter screen 43 and the convex strip 5 are connected by a placement method, the disassembly and cleaning process becomes very simple and quick, without the need for complicated tools or equipment.

[0055] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 5 As shown, a sturdy support leg 6 is fixedly installed on the side of the rectangular frame 42 away from the mounting base 41. The other end of the sturdy support leg 6 is supported on the outside of the land base barrel 1. The sturdy support leg 6 not only ensures the stability of the rectangular frame 42 during the filtration process, but also prevents shaking or tilting caused by water flow impact or dirt accumulation. The other end of the sturdy support leg 6 is supported on the outside of the land base barrel 1, forming direct contact and support with the barrel body. This design not only effectively distributes the weight borne by the rectangular frame 42 and the filter screen 43 on it to the land base barrel 1, but also further enhances the stability of the entire dirt filter element 4 through the supporting effect of the sturdy support leg 6.

[0056] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 2The rectangular frame 42 is inclined as a whole, and the height of the end of the rectangular frame 42 close to the mounting base 41 is higher than the height of the end of the rectangular frame 42 close to the stable support leg 6. The inclination of the rectangular frame 42 means that the height of the end of the rectangular frame 42 close to the mounting base 41 is higher than the height of the end of the rectangular frame 42 close to the stable support leg 6. This design makes the filter screen 43 inside the rectangular frame 42 also present a corresponding inclination angle. During the filtering process, when the bottom water treated by oxygenation is sprayed from the water outlet hole 33 and passes through the filter screen 43, the suspended particles, organic matter and other pollutants in the water will be intercepted and accumulated on the filter screen 43. Due to the inclination of the rectangular frame 42, the pollutants on the filter screen 43 will gradually flow to the edge of the land-based barrel barrel body 1 along the inclination angle. In this way, the pollutants will not be uniformly distributed or accumulated in a certain area on the filter screen 43, but will naturally gather at the edge position of the land-based barrel barrel body 1. This design greatly facilitates the cleaning of pollutants. The staff can stand at the edge of the land-based barrel barrel body 1 and directly observe the accumulation of pollutants on the filter screen 43. When it is necessary to clean the pollutants, the staff can easily disassemble the filter screen 43 and remove the accumulated pollutants. Since the pollutants have been gathered at the edge of the land-based barrel barrel body 1, the cleaning process is not only more intuitive and efficient, but also reduces the workload and operation difficulty of the staff.

[0057] The specific working principle of the bottom water purification and oxygenation device for mandarin fish feed aquaculture of the utility model is as follows:

[0058] First of all, ensure that the appropriate amount of mandarin fish fry and feed has been put into the land-based barrel barrel body 1, and maintain a certain water level. Then, start the entire bottom water purification and oxygenation device.

[0059] After the device is started, the submersible pump 21 starts to work. It is placed in the water in the land-based barrel barrel body 1, and the powerful suction force of the submersible pump 21 can extract the bottom water at the bottom of the barrel body. The bottom water is then transported to the oxygenation pipeline 3 through the output pipeline 22.

[0060] After the bottom water enters the straight pipe 31, it is evenly distributed to each water outlet hole 33 under the action of the uniform distribution plate 32. The water outlet holes 33 are equidistantly arranged on the surface of the straight pipe 31, which ensures that the bottom water can be uniformly sprayed into the land-based barrel barrel body 1, thereby achieving the effect of oxygenation.

[0061] When the bottom water is sprayed from the water outlet hole 33, it will be filtered first through the filter screen 43 to remove suspended particles, organic matter and other dirt such as mandarin fish feces and remaining feed, etc., since the rectangular frame 42 is inclined as a whole, the dirt on the filter screen 43 will gradually flow along its inclination angle to the edge of the land-based barrel barrel body 1, in this way, the dirt will not be evenly distributed or accumulated in an area on the filter screen 43, but will naturally gather at the barrel edge position, facilitating the cleaning of the staff, when cleaning the filter screen 43, the staff can stand at the edge of the land-based barrel barrel body 1 and directly observe the accumulation of dirt on the filter screen 43, facilitating its cleaning;

[0062] The whole bottom water purification and oxygenation device can not only effectively remove the dirt in the land-based barrel barrel body 1 and improve the water quality cleanliness during operation, but also provide sufficient oxygen for the mandarin fish through the oxygenation effect of the oxygenation pipeline 3, promote its healthy growth, and the design of the device also fully considers the accumulation and cleaning of the dirt, providing great convenience for the staff.

[0063] It should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0064] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A bottom water purification and oxygenation device for land-based feeding culture of mandarin fish, comprising a land-based barrel body (1) for feeding culture of mandarin fish, characterized in that, Also included are: a suction assembly (2) disposed inside the land-based barrel barrel body (1); an oxygenation pipeline (3) disposed on the suction assembly (2), wherein the suction assembly (2) is used to extract the bottom water in the land-based barrel barrel body (1), and then the oxygenation pipeline (3) flows from a high place into the land-based barrel barrel body (1) to oxygenate the water in the land-based barrel barrel body (1); a dirt filter (4) disposed on the suction assembly (2), wherein the dirt filter (4) is located between the oxygenation pipeline (3) and the land-based barrel barrel body (1), and is used to collect the dirt flowing out of the oxygenation pipeline (3) to purify the water in the land-based barrel barrel body (1).

2. The bottom water purification and oxygenation device for feeding and breeding of mandarin fish on land according to claim 1, characterized in that, The suction assembly (2) includes: a submersible pump (21) placed in the water in the land-based barrel barrel body (1); and an output pipeline (22) disposed on the water outlet end of the submersible pump (21) and in communication with the water outlet end of the submersible pump (21).

3. The bottom water purification and oxygenation device for land-based feeding and breeding of mandarin fish according to claim 2, characterized in that, The oxygenation pipeline (3) includes: a straight pipe (31) fixedly installed on the end of the output pipeline (22) and in communication with the output pipeline (22), wherein the straight pipe (31) and the output pipeline (22) are arranged perpendicular to each other; a uniform partition plate (32) fixedly installed on the inside of the straight pipe (31); and water outlet holes (33) provided on the surface of the straight pipe (31) and arranged equidistantly on the surface of the straight pipe (31).

4. The bottom water purification and oxygenation device for feeding and breeding of mandarin fish on land according to claim 3, characterized in that, The dirt filter (4) includes: a mounting seat (41) fixedly installed on the outside of the output pipeline (22); a rectangular frame (42) having one end fixedly connected to the outside of the mounting seat (41); and a filter screen (43) detachably connected to the inside of the rectangular frame (42), wherein the filter screen (43) and the straight pipe (31) are arranged in parallel, and the water outlet holes (33) are aligned with the filter screen (43).

5. The bottom water purification and oxygenation device for feeding and breeding of mandarin fish on land according to claim 4, characterized in that, The inside of the rectangular frame (42) is fixedly installed with a convex strip (5), and the filter screen (43) is placed on the inside of the rectangular frame (42), and one side surface of the filter screen (43) is in contact with the convex strip (5).

6. The bottom water purifying and oxygen increasing device for feeding and breeding of mandarin fish according to claim 4, characterized in that, The side end of the rectangular frame (42) away from the mounting seat (41) is fixedly installed with a stable support leg (6), and the other end of the stable support leg (6) is supported on the outside of the land-based barrel barrel body (1).

7. The bottom water purifying and oxygen increasing device for feeding and breeding of mandarin fish according to claim 6, characterized in that, The rectangular frame (42) is inclined as a whole, wherein the height of the end of the rectangular frame (42) close to the mounting seat (41) is higher than the height of the end of the rectangular frame (42) close to the stable support leg (6).

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