CN114431090B - Rice and fish combined circulating water tank planting and breeding method and water circulation equipment thereof - Google Patents

Abstract

The utility model belongs to the technical field of planting and culturing methods in the agriculture and fishery industry, and particularly relates to a planting and culturing method for rice and fish in a combined circulating water tank and equipment for water circulation. According to the utility model, rice is planted in the inner ring dykes and dams, shrimps, crabs and fishes are cultivated, an oxygenation area, a water pushing area, a water flowing groove area and a sewage collecting area are arranged between the inner ring dykes and dams and the outer ring dykes, water flows, and the fish is cultivated in the water flowing groove area, so that the requirements of green and efficient agriculture of rice-fish combination and agriculture-fish combination are met. In addition, the utility model also provides a filter screen type water pump assembly, namely equipment for water circulation required by the rice and fish combined type circulating water trough planting and breeding method, which structurally comprises a water pump, a water pipe, a bottom plate unit, a sewage collecting frame unit, an inserting column unit and a rectangular elastic filter screen, and is used for pumping sewage into an inner ring dam or discharging water out of the inner ring dam.

Description

Rice and fish combined circulating water tank planting and breeding method and water circulation equipment thereof

Technical Field

The utility model belongs to the technical field of planting and culturing methods in the agriculture and fishery industry, and particularly relates to a planting and culturing method for rice and fish in a combined circulating water tank and equipment for water circulation.

Background

The circulating water tank is a high-efficiency and green fishery cultivation method, namely, fish is put in the tank, and the circulating water is used for cultivation, and the flowing mode is circulating. The cultivation method is a combination form between pond cultivation and complete running water cultivation, has the characteristics of high efficiency and health of running water cultivation, and properly reduces the higher cost of the complete running water cultivation.

On the other hand, the whole water body is still fixed, and the farmed fish is used as a pollution source, so that a purification source is needed to be equipped in the whole circulation process, and the combined circulation flow trough mode of farming and fishing combination and planting and breeding combination is provided.

For example, chinese patent publication No. CN110934104A, publication No. 2020.03.31 discloses a fish light dish complementary system based on V-shaped launder, which is characterized in that: the photovoltaic power generation system is arranged on the iron support, the whole photovoltaic power generation system is fixed above the V-shaped fish tank, the bottom mud recycling system is arranged above the V-shaped fish tank and below the photovoltaic power generation system, the fish expelling system is arranged in the middle of the V-shaped fish tank, the vegetable base is arranged on one side of the bank of the V-shaped fish tank, the natural fish tank is arranged on one side of the tail end of the V-shaped fish tank, a permeable brick pavement is arranged between the V-shaped fish tank and the natural fish tank, and a precast concrete culvert pipe is buried below the permeable brick pavement.

The fish light vegetable complementary system in the patent of the utility model has the basic advantages of combined planting and raising of agriculture and fishing, namely: the fish pond provides fertilizer for vegetable fields, sewage put in the vegetable fields can be purified, relatively clean purified water can be discharged, and the whole circulation process can be ensured to be stable for a long time.

However, the complementary system in the patent of the utility model has a plurality of problems, wherein the two most obvious problems are unreasonable circulation sequence and uncontrollable circulation speed, namely, the dirt generated by fish farming cannot enter vegetable fields quickly and controllably, and the purified water body in the vegetable fields is inconvenient to discharge in real time and controllably.

Therefore, aiming at the circulating planting and breeding method, the whole circulating mode needs to be improved so as to ensure that the water body flows more reasonably and efficiently.

Correspondingly, at least two water pumps are needed in the water circulation process, one pumps sewage and the other pumps water. However, the existing water pump products, such as the Chinese patent with patent publication number of CN215256862U and publication date of 2021.12.21, disclose a well submersible pump capable of cleaning impurities adhered to a filter screen and preventing blockage, which structurally comprises a filter screen, a support plate fixedly arranged outside a water inlet section, a cleaning brush arranged outside the water inlet section, a lifting ring rotatably arranged between the upper support plate and the lower support plate, and fixedly arranged on the left side and the right side above a conveying section.

However, when the submersible pump is independently used for a circulating water tank planting and breeding method, two most critical defects that the extraction of fish shoal dirt is not thorough and foreign matters are easy to be blocked when the purified water body is extracted and discharged exist.

Therefore, in order to better enable the circulating water tank planting and breeding method to run, a structure-improved water pump structure with good dirt pumping effect and thorough foreign matter interception is urgently needed.

Disclosure of Invention

The utility model provides a rice-fish combined type circulating water tank planting and breeding method, which can be used for planting rice in an inner ring dyke, breeding shrimps, crabs and fish, arranging an oxygenation area, a water pushing area, a water flowing tank area and a sewage collecting area between the inner ring dyke and an outer ring dyke, and enabling water to flow, so that the requirements of green and efficient agriculture of rice-fish combination and agriculture-fish combination are met in a fish breeding mode in the water flowing tank area.

In addition, the utility model also provides a filter screen type water pump assembly, namely equipment for water circulation required by the rice and fish combined type circulating water trough planting and breeding method, which structurally comprises a water pump, a water pipe, a bottom plate unit, a sewage collecting frame unit, an inserting column unit and a rectangular elastic filter screen, and is used for pumping sewage into an inner ring dam or discharging water out of the inner ring dam.

The utility model adopts the technical proposal that: a rice and fish combined type circulating water tank planting and breeding method sequentially comprises the following steps:

s1, planting rice in an inner ring of a dyke, and culturing shrimps, crabs and fish;

s2, an oxygenation area, a water pushing area, a water flowing groove area and a sewage collecting area are sequentially arranged between the outer ring dykes and the inner ring dykes along the advancing direction of the water flow, and fish are cultivated in the water flowing groove area;

s3, arranging a first filter screen type water pump assembly in the sewage collecting area, wherein the first filter screen type water pump assembly is used for placing sewage into the inner ring dykes and dams;

s4, arranging a second filter screen type water pump assembly in the inner ring dykes and dams for discharging purified water to the outside of the inner ring dykes and dams;

s5, feeding the fish in the water flowing groove area with feed;

s6, performing independent on-off regulation control on the two filter screen type water pump assemblies;

s7, finally harvesting rice, shrimps, crabs and at least two fishes.

The further preferable technical scheme is as follows: s1, S2, the shape of the inner ring dykes and dams and the outer ring dykes and dams is rectangular, the oxygenation area comprises a front-end pasture and water interception net and an impeller aerator, the water pushing area comprises an underwater motor and a rear-end pasture and water interception net, and the water flowing groove area comprises fixed nets at two ends and an isolation net in the middle.

The further preferable technical scheme is as follows: the two filter screen type water pump assemblies are respectively arranged at two opposite angle positions of the inner ring dykes and dams, the oxygenation area, the water pushing area, the water flowing groove area and the sewage collecting area are all arranged on the same side of the inner ring dykes and dams, and the length direction of the isolation net is parallel to the water flow direction.

The utility model provides a filter screen formula water pump assembly, includes the water pump to and the water pipe, still includes the bottom plate unit, sets up on the bottom plate unit and be used for laying the dirty frame unit of collection of water pump, set up insert the post unit on the dirty frame unit lateral surface of collection, and set up insert on the post unit, and be used for the entrapment fish drainage thing and the residual fodder in dirty district, or block the rectangle elastic filter screen of interior debris of inner circle dykes and dams.

The further preferable technical scheme is as follows: the base plate unit includes a flat plate, and an annular groove provided on an upper surface of the flat plate for insertion and installation of the rectangular elastic screen which has been bent into a circular shape.

The further preferable technical scheme is as follows: the dirt collecting frame unit comprises a rectangular frame body arranged on the upper surface of the flat plate and positioned on the inner side of the annular groove, and a dirt inlet which is arranged on the rectangular frame body and used for allowing fish excrement and residual feed to flow inwards.

The further preferable technical scheme is as follows: the inserting column unit comprises a fixed stud arranged on the outer side face of the rectangular frame body, a barrel body which is arranged on the fixed stud in a threaded connection mode, a movable screw rod which is arranged on the barrel body and used for inserting the unfolded rectangular elastic filter screen, and two nuts which are arranged on the movable screw rod and used for clamping and fixing two sides of the rectangular elastic filter screen respectively.

The further preferable technical scheme is as follows: when two ends of the rectangular elastic filter screen are respectively connected with the inner ring dykes and the outer ring dykes, the movable screw rod is arranged on the fixed stud and extends to be inserted into a middle mesh of the rectangular elastic filter screen; when the rectangular elastic filter screen is bent into a round shape and is inserted into the annular groove, the movable screw rod is taken down from the fixed stud so as to be inserted into a mesh of an overlapping area of the rectangular elastic filter screen.

The further preferable technical scheme is as follows: the number of the fixing studs is two, and circular thread blocks used for screwing and fixing the taken-down cylinder body are arranged on the outer side face of the rectangular frame and positioned at the position between the two fixing studs.

The further preferable technical scheme is as follows: and fixing bolts for installing the rectangular elastic filter screen are arranged on the opposite side surfaces of the inner ring dykes and the outer ring dykes.

The present utility model has the following advantages.

First, in the inner ring dykes and dams, rice and fish combinations are included, rice seedlings purify water bodies, fish eat insects and weeds, excrement is used for fertilizing the seedlings, and a more efficient and green combined agriculture mode is formed.

Secondly, fish which need to be fed with feed are cultivated in the water flowing groove area and are used for further strengthening the combined agriculture mode, the principle is the same, but the income can be greatly increased.

Thirdly, the positions of the oxygenation area, the water pushing area, the water flowing groove area and the sewage collecting area are arranged reasonably in sequence, so that the fish culture in the water flowing groove is ensured to be more efficient and tidy.

Fourth, the filter screen formula water pump assembly is used in the dirt collection district, and the dirt degree of collection is high, and the filth that fish cultivation produced is difficult for getting into lower part circulating water, guarantees that most filth all gets into in the inner circle dykes and dams.

Fifth, when the filter screen type water pump assembly is used in an inner ring dyke, sundries are not easy to be involved in the water pump, and the water purification and discharge operation is ensured to be safer and faster.

Sixth, the filter screen type water pump assembly is high in self-structure compactness, and the dual-purpose mode of the rectangular elastic filter screen is ingenious, stable and simple, and is not easy to fall and loose no matter the filter screen type water pump assembly is unfolded or coiled.

Drawings

FIG. 1 is a schematic view of a circulating water trough structure in the present utility model.

Fig. 2 is a schematic structural view of a filter-type water pump assembly according to the present utility model.

FIG. 3 is a schematic view showing the use mode of the rectangular elastic filter screen for intercepting fish excrement and residual feed in the utility model.

FIG. 4 is a schematic diagram of a use mode of the rectangular elastic filter screen for intercepting sundries in an inner ring dike according to the utility model.

FIG. 5 is a schematic view of the usage of the movable screw in the present utility model in the overlapping area of the rectangular elastic filter screen.

FIG. 6 is a schematic view of the use of the movable screw with a circular thread block according to the present utility model.

Fig. 7 is a schematic view showing the installation positions of the fixed net and the rectangular elastic filter net in the present utility model.

In the drawings, the components represented by the respective reference numerals are as follows: the inner ring dykes a, the outer ring dykes b, the front end pasture interception net c, the rear end pasture interception net d, the fixed net e, the isolation net f, the water pump 11, the water pipe 12, the bottom plate unit 1, the dirt collecting frame unit 2, the inserting column unit 3, the rectangular elastic filter screen 4, the flat plate 101, the annular groove 102, the rectangular frame 201, the dirt inlet 202, the fixed stud 301, the cylinder 302, the movable screw 303, the nut 304, the circular thread block 305 and the fixed bolt 5.

Detailed Description

The following description is of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model.

As shown in the accompanying figures 1-7, the rice and fish combined circulating water tank planting and breeding method sequentially comprises the following steps:

s1, planting rice in an inner ring dyke a, and culturing shrimps, crabs and fish;

s2, an oxygenation area, a water pushing area, a water flowing groove area and a sewage collecting area are sequentially arranged between the outer ring dykes b and the inner ring dykes a along the advancing direction of the water flow, and fish are cultivated in the water flowing groove area;

s3, arranging a first filter screen type water pump assembly in the sewage collecting area, wherein the first filter screen type water pump assembly is used for placing sewage into the inner ring dykes and dams a;

s4, arranging a second filter screen type water pump assembly in the inner ring dyke a for discharging purified water to the outside of the inner ring dyke a;

s5, feeding the fish in the water flowing groove area with feed;

s6, performing independent on-off regulation control on the two filter screen type water pump assemblies;

s7, finally harvesting rice, shrimps, crabs and at least two fishes.

In this embodiment, the inner ring dykes and dams a and b are both formed by casting concrete, and the whole bottom surface is silt, so that casting concrete is not needed.

In S1, the cultured fish in the inner ring dykes and dams a are carp, grass carp and the like, and together with shrimps and crabs, pests and weeds can be eaten, and rice is the water purifying position of the whole circulating water tank, so that the continuous relative cleanliness of the cultured water between the inner ring dykes and dams a and b is ensured.

In S2, the farmed fish in the water flow channel area is a "feed fish" with high economic benefit, such as a micropterus salmoides, and the water pushing area is a key point that the water in the annular channel between the inner ring dykes a and the outer ring dykes b can circulate.

In addition, the fishing time of the shrimps, crabs and fish in the inner ring dam a is required to be corresponding to the harvesting time of the rice, and preferably, the fishing is completed before harvesting the rice so as to ensure that the shrimps, crabs and fish do not influence each other, and the cultured fish in the water flowing groove area is not limited, so that the economic benefit is maximized as a primary requirement.

In S1, S2, the shape of inner ring dykes and dams a and outer ring dykes and dams b is the rectangle, oxygenation district includes front end pasture and water interception net c and impeller oxygen-increasing machine, the water pushing district includes underwater motor and rear end pasture and water interception net d, the basin district includes fixed network e at both ends and isolation net f in middle part.

In this embodiment, the material of front end pasture and water interception net c, rear end pasture and water interception net d, fixed network e and isolation net f is foraminiferous corrosion resistant plate, is the network structure promptly, impeller aerator includes upper portion motor and lower part rotating impeller, underwater motor includes waterproof motor and vertical rotatory agitator wheel, and both are current equipment.

The two filter screen type water pump assemblies are respectively arranged at two opposite angle positions of the inner ring dykes and dams a, the oxygenation area, the water pushing area, the water flowing groove area and the sewage collecting area are all arranged on the same side of the inner ring dykes and dams a, and the length direction of the isolation net f is parallel to the water flow direction.

In this embodiment, the meshes of the fixing net e and the isolating net f are relatively large, so that the dirt collecting area can be ensured to suck all dirt into the inner ring dam a through excrement and residual feed, and a plurality of areas blocked by the isolating net f can be used for culturing various fishes of different types.

In addition, as shown in fig. 1, the water flow direction is clockwise, and all the water plants in the annular channel are positioned between the front water plant interception net c and the rear water plant interception net d, so that the cleaning is convenient.

The filter screen type water pump assembly comprises a water pump 11, a water pipe 12, a bottom plate unit 1, a dirt collecting frame unit 2 arranged on the bottom plate unit 1 and used for placing the water pump 11, an inserting column unit 3 arranged on the outer side face of the dirt collecting frame unit 2, and a rectangular elastic filter screen 4 arranged on the inserting column unit 3 and used for intercepting fish discharge and residual feed in a dirt collecting area or sundries in an inner ring dam a.

In this embodiment, the circulating water tank needs at least two filter screen type water pump assemblies, one of which is disposed in the sewage collecting area and pumps fish excrement and residual feed into the inner ring dam a, and the other of which is disposed at the rectangular end corner furthest from the inner ring dam a and is used for pumping water after the rice has been purified outwards into the annular channel, so as to ensure that the fish in the circulating water tank area can grow healthier and faster.

When the screen type water pump assembly is used for pumping dirt inwards: the rectangular elastic filter screen 4 is unfolded, the lower part of the rectangular elastic filter screen is inserted into sludge in the annular channel, two opposite sides of the inner ring dykes and dams a and the outer ring dykes and dams b are respectively connected and fixed, so that fish excrement and residual feed flow out from the fixed net e and can enter the inner ring dykes and dams a, namely rice fields through the filter screen type water pump assembly.

It should be noted that the rectangular elastic filter screen 4 has the same material and shape as all the above filter screens, and the only difference is that the mesh is smaller, so that fish excrement and residual feed are prevented from flowing out from the rectangular elastic filter screen 4.

And when the filter screen type water pump assembly is used for discharging clean water outwards: the rectangular elastic filter screen 4 is wound into a ring and fixed on the bottom plate unit 1 to intercept sundries such as dead branches and dead leaves and the like for protecting the water pump 11.

Finally, the rectangular elastic filter screen 4 can be fixed by the insertion column unit 3 whether it is flattened or wound into a circle, and the water pipe 12 needs to extend upwards when in use, and needs to turn over the inner ring dike a.

The floor unit 1 includes a flat plate 101, and an annular groove 102 provided on an upper surface of the flat plate 101 for inserting and mounting the rectangular elastic screen 4 which has been bent into a circular shape.

In this embodiment, the purpose of the plate 101 is to prevent the water pump 11 from entering the sludge, which would otherwise be a significant pump, rather than fish drain and residual feed, and not a clean body of water, and the screen pump assembly would fail. The flat plate 101 needs to be relatively large for stably supporting the water pump 11.

The dirt collecting frame unit 2 includes a rectangular frame 201 provided on the upper surface of the flat plate 101 and located inside the annular groove 102, and a dirt inlet 202 provided on the rectangular frame 201 for inward inflow of fish excrement and residual feed.

In this embodiment, the area of the rectangular frame 201 is 50% or more of the area of the dirt collecting region, so as to receive the dropped fish drain and residual feed, and the dirt inlet 202 is matched with the suction force of the water pump 11, so that a small amount of the fish drain and residual feed in the distance can be sucked away.

The insertion column unit 3 includes a fixing stud 301 disposed on an outer side surface of the rectangular frame 201, a cylinder 302 screwed on the fixing stud 301, a movable screw 303 disposed on the cylinder 302 for inserting the rectangular elastic screen 4 that has been expanded, and two nuts 304 disposed on the movable screw 303 for clamping and fixing both sides of the rectangular elastic screen 4, respectively.

In this embodiment, the filter-type water pump assembly is installed in the sewage collecting area, the rectangular elastic filter screen 4 needs to be installed at the outer side of the flat plate 101, so the insertion column unit 3 needs to be relatively long, that is, the fixed stud 301 and the movable screw 303 are abutted and then used together.

On the other hand, when the screen type water pump assembly is installed in a paddy field, the flexible rectangular elastic screen 4 needs to be enclosed into a circle and retracted more inwards, so if the insertion column unit 3 is too long, the operation difficulty of inserting and fixing the rectangular elastic screen 4 is relatively high, which is the key point of the removable and threadably connecting the movable screw 303.

When the rectangular elastic filter screen 4 encloses a circle, the fixing stud 301 is used for plugging and fixing the position of the circle to avoid movement, the movable screw 303 is used for plugging and fixing the shape of the circle to avoid scattering, and finally the nut 304 is used for completely sewing the circle formed by bending the rectangular plate to avoid sundries such as dead branches, dead leaves and the like from entering the water pump 11, even if the water pump 11 has a smaller filter screen.

When the two ends of the rectangular elastic filter screen 4 are respectively connected with the inner ring dykes a and the outer ring dykes b, the movable screw 303 is arranged on the fixed stud 301 and extends so as to be inserted into the middle mesh of the rectangular elastic filter screen 4; when the rectangular elastic screen 4 is bent into a circular shape and inserted into the annular groove 102, the movable screw 303 is removed from the fixing stud 301 for insertion into the mesh of the overlapping area of the rectangular elastic screen 4.

In this embodiment, the diameters of the fixed stud 301 and the movable screw 303 are smaller than the mesh of the rectangular elastic filter screen 4, so as to ensure effective insertion, and when the movable screw 303 is inserted into the flattened rectangular elastic filter screen 4, the rectangular elastic filter screen 4 is mainly prevented from being washed away by water flow.

And when the fixed screw 301 and the movable screw 303 are separated, the former is provided with the round rectangular elastic filter screen 4, and the latter is provided with the round rectangular elastic filter screen 4.

Finally, the length of the rectangular elastic screen 4 needs to be relatively large, ensuring that there is still sufficient overlap area after one turn around the annular groove 102 for the movable screw 303 to be inserted and fixed.

The number of the fixing studs 301 is two, and a circular threaded block 305 for screwing and fixing the removed cylinder 302 is arranged on the outer side surface of the rectangular frame 201 and at a position between the two fixing studs 301.

In this embodiment, when the movable screw 303 and the cylinder 302 together fix the rectangular elastic screen 4, the whole body of the movable screw 303 and the cylinder 302 is not fixed in the mounting position, so that the movable screw 303 and the cylinder 302 shake together as long as the rectangular elastic screen 4 is impacted and deformed, and the rectangular elastic screen 4 cannot be mounted fixedly, that is, only assembled.

After the circular thread block 305 is provided, the movable screw 303 and the cylinder 302 are also fixed, so that the final effect is that: after the rectangular elastic filter screen 4 is wound into a circle, the fixing stud 301 is fixedly installed, the movable screw 303 is fixedly installed and fixedly assembled, and the circle of the rectangular elastic filter screen 4 is not easy to scatter and move.

The opposite side surfaces of the inner ring dykes a and the outer ring dykes b are respectively provided with a fixing bolt 5 for installing the rectangular elastic filter screen 4.

In this embodiment, the position of the fixing bolt 5 is the installation position of the rectangular elastic filter screen 4, and at this time, the rectangular elastic filter screen 4 is unfolded, so that it becomes the last line of defense of fish excrement and residual feed, and cannot flow out.

Finally, the filter screen type water pump assembly in the embodiment has two use states, and the purpose is to ensure that the circulating water tank mode is more stable and efficient in case one of the filter screen type water pump assembly is damaged and the other filter screen type water pump assembly can be used for emergency.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model. These are all non-inventive modifications which are intended to be protected by the patent laws within the scope of the appended claims.

Claims (3)

1. The utility model provides a rice fish combination formula circulation flow basin system of breeding, includes inner circle dykes and dams (a), outer lane dykes and dams (b) for to put into the first screen type water pump assembly of sewage in inner circle dykes and dams (a), and set up in inner circle dykes and dams (a) be used for to the second of the outer discharge water purification of inner circle dykes and dams (a) screen type water pump assembly, its characterized in that:

the filter screen type water pump assembly comprises a water pump (11), a water pipe (12), a bottom plate unit (1), a dirt collecting frame unit (2) arranged on the bottom plate unit (1) and used for placing the water pump (11), an inserting column unit (3) arranged on the outer side surface of the dirt collecting frame unit (2), and a rectangular elastic filter screen (4) arranged on the inserting column unit (3) and used for intercepting fish discharge and residual feed in a dirt collecting area or blocking sundries in an inner ring dam (a),

the base plate unit (1) includes a flat plate (101), and an annular groove (102) provided on an upper surface of the flat plate (101) for inserting and mounting the rectangular elastic screen (4) which has been bent into a circular shape,

the dirt collecting frame unit (2) comprises a rectangular frame body (201) arranged on the upper surface of the flat plate (101) and positioned on the inner side of the annular groove (102), and a dirt inlet (202) arranged on the rectangular frame body (201),

the insertion column unit (3) comprises a fixed stud (301) arranged on the outer side surface of the rectangular frame body (201), a cylinder body (302) which is in threaded connection with the fixed stud (301), a movable screw (303) which is arranged on the cylinder body (302) and used for inserting the expanded rectangular elastic filter screen (4), and two nuts (304) which are arranged on the movable screw (303) and respectively used for clamping and fixing two sides of the rectangular elastic filter screen (4),

two ends of the rectangular elastic filter screen (4) in the first filter screen type water pump assembly are respectively connected with the inner ring dykes and dams (a) and the outer ring dykes and dams (b), and the movable screw (303) is arranged on the fixed stud (301) and extends to be inserted into a middle mesh of the rectangular elastic filter screen (4);

the rectangular elastic filter screen (4) in the second filter screen type water pump assembly is bent into a round shape and inserted into the annular groove (102), the fixed screw bolt (301) is used for fixedly inserting the rectangular elastic filter screen (4) which is bent into a round shape, and the movable screw bolt (303) is removed from the fixed screw bolt (301) and is used for being inserted into meshes of an overlapping area of the rectangular elastic filter screen (4).

2. The rice and fish combined circulating water trough planting and breeding system according to claim 1, wherein: the number of the fixing studs (301) is two, and circular thread blocks (305) used for screwing and fixing the removed cylinder (302) are arranged on the outer side face of the rectangular frame body (201) and positioned at the position between the two fixing studs (301).

3. The rice and fish combined circulating water trough planting and breeding system according to claim 1, wherein: the opposite side surfaces of the inner ring dykes and dams (a) and the outer ring dykes and dams (b) are respectively provided with a fixing bolt (5) for installing the rectangular elastic filter screen (4).

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