CN215684251U - Fancy carp breeding device for greenhouse production - Google Patents

Fancy carp breeding device for greenhouse production Download PDF

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Publication number
CN215684251U
CN215684251U CN202120707580.3U CN202120707580U CN215684251U CN 215684251 U CN215684251 U CN 215684251U CN 202120707580 U CN202120707580 U CN 202120707580U CN 215684251 U CN215684251 U CN 215684251U
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water
culture pond
breeding
pond
tank
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史东杰
朱华
李文通
王赛赛
孙砚胜
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Beijing Fisheries Research Institute (national Engineering Research Center For Freshwater Fisheries)
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Beijing Fisheries Research Institute (national Engineering Research Center For Freshwater Fisheries)
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Abstract

The utility model provides a koi breeding device for greenhouse production, which comprises a breeding unit, a water treatment unit and a water temperature control unit, wherein the breeding unit comprises a breeding pond, an oxygen exposure structure, a water inlet and a water outlet, wherein the oxygen exposure structure, the water inlet and the water outlet are connected to the periphery of the breeding pond; the water treatment unit comprises a dripping device; the water temperature control unit comprises an operating machine, a hot water pipe and a branch net. According to the utility model, water in the culture pond enters the trickling device to be filtered and then drips out of the trickling device to enter the culture pond, so that the water quality in the culture pond can be rapidly purified; when water passes through the dripping device, the time that water flow stays outside the culture pond is prolonged, more oxygen can be created, the oxygen content in the culture pond is improved, and the fancy carp can live in the water; meanwhile, the water flow falling from the dripping device forms flow making, so that floating impurities in the culture pond can be discharged conveniently. The water temperature control unit adjusts the water temperature in the culture pond, and ensures that the growth conditions of the fancy carps are comfortable in winter, thereby increasing the output value and improving the economic benefit.

Description

Fancy carp breeding device for greenhouse production
Technical Field
The utility model relates to the technical field of fishery breeding, in particular to a koi breeding device for greenhouse production.
Background
The fancy carp belongs to Cypriniformes (Cypriniformes), Cyprinidae (Cyprinidae) and Cyprinus (Cyprinus), and is large ornamental aquatic animal. The economic value of the koi mainly depends on the physical form, body color, speckles and other appearance factors.
However, the appearance factors are mainly influenced by water quality, and the requirements of koi breeding on the water quality are high. At present, the brocade carp breeding water quality treatment mode mainly filters through hairbrushes, biochemical cotton and other filter materials, the water quality treatment cannot achieve an ideal effect, and the water quality retention time is short. Therefore, water needs to be changed regularly, which wastes time and labor and consumes a large amount of water resources.
In addition, the temperature changes in different degrees in four seasons in both south and north China. Especially in winter in the north, the air temperature drops suddenly, and even if the fancy carps are cultivated in a greenhouse, the water temperature range of 18-23 ℃ in the cultivation pond is difficult to maintain. If the water temperature is lower than 10 ℃, the fancy carp does not eat any more, the fancy carp does not eat until the air temperature rises again in 3-4 months in the next year, and the fancy carp consumes energy to overwinter in the period, so that the fancy carp output value is reduced, and the economic benefit is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a fancy carp breeding device for greenhouse production, which is used for solving the defects that the water quality treatment effect of fancy carp breeding is not ideal, the air temperature is too low, and the fancy carp production value is reduced in the prior art.
The utility model provides a koi breeding device for greenhouse production, which comprises:
the culture unit comprises a culture pond, an oxygen aeration structure, a water inlet and a water outlet, wherein the oxygen aeration structure, the water inlet and the water outlet are connected to the periphery of the culture pond;
the water treatment unit comprises a sedimentation tank, a brush tank, a biochemical tank, a clean water tank and a dripping device, wherein the sedimentation tank, the brush tank, the biochemical tank and the clean water tank are sequentially distributed along the circumferential direction of the culture tank and sequentially carry out water quality treatment, the water inlet is communicated with the clean water tank, and the water outlet is communicated with the sedimentation tank; the drip device is erected above the culture pond;
and the water temperature control unit comprises an operating machine, a hot water pipe and a branch net, wherein the hot water pipe is connected with the operating machine and is coiled on the branch net.
According to the koi breeding device for greenhouse production, which is provided by the utility model, the dripping device comprises a support, a filtering carrying frame and a water supply structure, wherein the water supply structure is positioned on the support, and the filtering carrying frame is used for containing a filtering material and is positioned between the support and the water supply structure.
According to the koi breeding device for greenhouse production, provided by the utility model, the filter material is one or more of biochemical balls, biochemical cotton, biochemical felt, rattan cotton and white cotton.
According to the koi breeding device for greenhouse production, provided by the utility model, the filtering carrying frames are stacked in multiple layers, and each layer of the filtering carrying frame is filled with the same type of filtering materials or different filtering materials.
According to the koi breeding device for greenhouse production provided by the utility model, the filtering carrying frame is provided with three layers in a laminated manner, and the filtering materials contained in each layer of the filtering carrying frame are respectively as follows:
the top layer is made of white cotton and fine-pore biochemical cotton;
the middle layer is a biochemical ball and a mesoporous biochemical cotton;
the bottom layer is coarse-pore biochemical cotton.
According to the fancy carp breeding device for greenhouse production provided by the utility model, the water supply structure comprises the water dropping pipe and the water pump, and water outlet holes are formed in the water dropping pipe at equal intervals along the length direction.
According to the koi breeding device for greenhouse production, provided by the utility model, the water outlet comprises a water surface water outlet and a water bottom water outlet, and the dripping device is erected above the side wall of the breeding pond opposite to the water surface water outlet.
According to the koi breeding device for greenhouse production provided by the utility model, the breeding pool is provided with the springboard along the circumferential direction.
According to the koi breeding device for greenhouse production, provided by the utility model, the overflow port is formed in the position, close to the upper end, of the side wall of the breeding pond.
According to the koi breeding device for greenhouse production provided by the utility model, the hot water pipe is arranged in any one treatment pool of the water treatment unit.
The koi breeding device for greenhouse production is improved on the basis of the existing koi breeding system or breeding device, the dripping device is erected above the breeding pond, water in the breeding pond enters the dripping device to be filtered, then drips out of the dripping device and enters the breeding pond, and water quality in the breeding pond can be rapidly purified; when water passes through the dripping device, the time that water flow stays outside the culture pond is prolonged, more oxygen can be created, the oxygen content in the culture pond is improved, and the fancy carp can live in the water; meanwhile, the water flow falling from the dripping device forms flow making, so that floating impurities in the culture pond can be discharged conveniently.
Meanwhile, under the condition that the water temperature in the culture pond is low, the water temperature control unit can be started, the operating machine is connected with tap water and a hot water pipe, the water is heated and then is sent into the circulating hot water pipe, the hot water pipe dissipates heat in the treatment pond, so that the temperature of water flow around the hot water pipe is increased, the heated water flow flows into the culture pond to adjust the water temperature in the culture pond, the growth condition of the koi in winter is ensured to be comfortable, the yield is increased, and the economic benefit is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a top view of a koi breeding device for greenhouse production provided by the utility model;
FIG. 2 is a schematic connection diagram of a koi breeding device for greenhouse production provided by the utility model;
FIG. 3 is a schematic view of a partial structure of a koi breeding device for greenhouse production provided by the present invention;
FIG. 4 is a schematic view of a water temperature control unit according to the present invention;
reference numerals:
1: a culture pond; 2: an oxygen-exposed structure; 3: a water inlet;
4: a water surface drainage outlet; 5: a water bottom water outlet; 6: an overflow port;
7: a springboard is prevented; 8: a sedimentation tank; 9: a brush tank;
10: a biochemical pool; 11: a clean water tank; 12: a dripping device;
121: a support; 122: filtering the carrying frame; 123: a water supply structure;
13: an operating machine; 14: a hot water pipe; 15: supporting a net;
16: a first drain port; 17: a blow-off pipe; 18: a second sewage draining outlet;
19: and a water discharge pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention will be described below with reference to fig. 1 to 4. It should be understood that the following description is only exemplary embodiments of the present invention and is not intended to limit the present invention in any way.
The utility model provides a koi breeding device for greenhouse production, which is taken as an embodiment of the utility model and comprises a breeding unit, a water treatment unit and a water temperature control unit;
firstly, the culture unit comprises a culture pond 1, an oxygen aeration structure 2 connected to the culture pond 1, a water inlet 3 and a water outlet; the culture pond 1 is a square or rectangular cement pond, the periphery of the pond bottom is high, the middle is low, and the pond bottom is in a pot bottom shape; specification of the culture pond 1: the length of the culture pond can be designed to be 5m-8m, the width of the culture pond is 3m-8m, the depth of the culture pond is 1.5m-2.0m, and the water depth of the culture pond 1 is 1.3m-1.8 m.
The water outlets are provided with two groups of water outlets 4 and water outlets 5 with different positions. Wherein, the bottom outlet 5 is arranged at the center of the bottom of the culture pond 1, namely the lowest position of the bottom of the culture pond 1, the bottom outlet 5 is connected with one end of a drain pipe 19, and the other end of the drain pipe 19 extends into the sedimentation tank 8, so that the water in the culture pond 1 flows into the sedimentation tank 8.
The water surface outlet 4 is arranged on the side wall of the culture pond 1 and is close to the water surface, the water surface outlet 4 penetrates through the sedimentation pond 8, and the floating objects on the water surface of the culture pond 1 and water flow are converged into the sedimentation pond 8 together for sedimentation and filtration.
The water inlet 3 is positioned on the side wall of the culture pond 1 and is close to the upper part of the culture pond 1, the water inlet 3 is connected into the clean water pond 11 through a water inlet pipe, and water in the clean water pond 11 is pumped into the culture pond 1 through a water pump.
The oxygen exposure structure 2 consists of a nano tube, an air inlet pipe and a gas production device, wherein the nano tube is arranged at the bottom of the culture pond 1 in a circular or rhombic shape and is connected to the gas production device through the air inlet pipe. The oxygen aeration structures 2 are distributed at four corner positions of the culture pond 1.
The gas production device can be a gas storage buffer device which is connected with the motor, and the time for starting up and increasing oxygen is determined according to the rule of the change of dissolved oxygen in the water body. The oxygen-exposed structure is prior art, and the structure and the using process are clear to those skilled in the art, and therefore, the detailed description is omitted.
In this embodiment, the overflow port 6 is provided on the side wall of the culture pond 1 near the upper end surface. Under normal conditions, the overflow port 6 is positioned above the horizontal plane of the culture pond 1; when the horizontal surface of the culture pond 1 overflows the overflow port 6, the water flow in the culture pond 1 overflows from the overflow port 6.
In the embodiment, the edge of the culture pond 1 is provided with the anti-bouncing plate 7 for preventing the koi from bouncing out of the culture pond 1 along the circumferential direction, and the height of the anti-bouncing plate 7 is 40cm-50 cm.
The anti-bouncing plate 7 can be a wood plate or a steel plate, and can also be a net structure. The anti-jumping plate 7 is fixed on the circumferential edge of the culture pond 1 through bolts.
Secondly, the water treatment unit comprises a sedimentation tank 8, a brush tank 9, a biochemical tank 10, a clean water tank 11 and a dripping device 12, wherein the sedimentation tank 8, the brush tank 9, the biochemical tank 10 and the clean water tank 11 are sequentially arranged along the circumferential direction of the culture tank 1 and occupy 1/2 of the circumference of the culture tank 1; the drip device 12 is erected above the culture pond 1.
The sedimentation tank 8, the hairbrush tank 9 and the biochemical tank 10 are the same as the fancy carp breeding water treatment tank in the prior art, and therefore, the details are not repeated.
At least four ultraviolet disinfection lamps are arranged in the clean water tank 11 along the periphery of the tank wall and are used for sterilizing and disinfecting the treated water.
The trickling device 12 is formed by three-dimensionally erecting 3-5 layers of filtering materials and comprises a support 121, a filtering carrying frame 122 and a water supply structure 123, wherein the filtering carrying frame 122 is used for containing the filtering materials, the filtering materials are uniformly placed in the filtering carrying frame 122, and the support 121 is used for bearing the filtering carrying frame 122 and the water supply structure 123; the water supply structure 123 includes a trickling pipe and a water pump (not shown in the figure), the water pump pumps water from the culture pond 1 to the trickling pipe, the trickling pipe is provided with water outlet holes with intervals of 2-5 cm, the water is dripped into the filtration carrying frame 122 layer from top to bottom after water is discharged, and finally the filtered water is dripped into the culture pond 1.
Wherein, the filter material can be selected from biochemical balls, and the biochemical balls have good bacterium culture effect and high efficiency; the filter material can also be selected from biochemical cotton (coarse, fine, and middle pore size), biochemical felt, rattan cotton, or common white cotton.
The type selection and installation of the water pump are determined according to the lift of the trickle flow, the lift is generally higher than the trickle flow, for example, the lift of the culture pond 1 with the height of 1.2 m can be 2 m.
The water drops in the dripping device 12 are from top to bottom, so the water drops pass through each filter material and finally reach the culture pond 1, and the function of the water drops is to disperse water flow, so that the lower filter material can fully play a role. And the resistance that traditional filtering ponds normal water received every inflow passageway is different for rivers can not evenly pass through every filter media, and the filter media can not effectively be utilized.
In addition, in the dripping device 12, the time that the water flow stays outside the culture pond 1 is longer, so that more oxygen can be created, the oxygen content in the culture pond 1 is increased, and the fancy carp can survive in the culture pond 1; and the time that the water current stays outside the culture pond 1 is longer, the effect of cooling can be indirectly played, and the water temperature in the culture pond 1 is ensured to be appropriate.
Furthermore, the water temperature control unit is used for controlling the water temperature in the culture pond 1 and comprises an operating machine 13, a hot water pipe 14 and a branch net 15. The operating machine 13 can set and regulate the temperature of water in the hot water pipe, and the hot water pipes 14 filled with hot water are distributed on the branch net 15, and the structural shape of the branch net 15 is matched with the structural shapes of the sedimentation tank 8, the hairbrush tank 9, the biochemical tank 10 and the clean water tank 11 in the water treatment unit, so that the branch net 15 can be placed into each tank together with the hot water pipes 14.
According to actual needs, the branch net 15 carrying the hot water pipe 14 is placed in 1-2 ponds of the water treatment unit to regulate and control the temperature of the culture water.
Specifically, the branch net 15 may be a steel mesh, the hot water pipe 14 is tied to the steel mesh, and the steel mesh and the hot water pipe 14 are placed into 1-2 pools of the water treatment unit together for heat dissipation. The operation machine 13 can adopt a water heater to circularly supply hot water for the hot water pipe 14.
In this embodiment, the bottom of the culture pond 1 is provided with a first sewage draining port 16, the first sewage draining port 16 is connected with a sewage draining pipe 17, and the central position of the bottom of each treatment pond in the water treatment unit is provided with a second sewage draining port 18, the second sewage draining port 18 is communicated with the sewage draining pipe 17, and the end part of the sewage draining pipe 17 is connected with a sewage draining pump.
In this embodiment, the water level in the culture pond 1 is higher than the water level in the sedimentation tank 8, so that the water in the culture pond 1 can automatically flow into the sedimentation tank 8 through physical action (i.e. siphon principle), and energy-consuming elements such as a water pump are avoided.
On the basis of the above embodiment, as an optional implementation manner of the present invention, the supplementary water inlet of the culture pond 1 may be connected to the sedimentation tank 8, so that the supplementary water firstly enters the sedimentation tank 8, is mixed with the circulating water, then is precipitated, filtered and disinfected, and then returns to the culture pond 1, thereby ensuring that the water quality in the culture pond 1 is excellent.
In addition to the above-mentioned embodiments, as an optional embodiment of the present invention, the trickling device 12 is installed above the side wall of the culture pond 1 opposite to the water surface drain opening 4, and the water flow falling from the trickling device 12 forms an induced flow, so that the fish can be blown to the side of the water surface drain opening 4, and flow from the water surface drain opening 4 to the sedimentation tank 8 for sedimentation and filtration.
In addition to the above examples, as an alternative embodiment of the present invention, in order to improve the filtering effect of the trickle device 12, a three-layer filter medium may be selected for the trickle device 12, and the arrangement of each layer of filter medium is as follows:
the top layer can adopt a layer of thin white cotton and fine-pore biochemical cotton in a mixed manner, the thin white cotton has long service life and short replacement period; the fine-pore biochemical cotton can block most of the filtered impurities and simultaneously block part of water flow;
the middle layer can adopt biochemical balls and mesoporous biochemical cotton, and the mesoporous biochemical cotton is selected to allow water to continuously flow down, so that water accumulation is avoided, and the dripping effect of the lower-layer filter material is influenced.
The bottom layer can adopt coarse-pore biochemical cotton and coarse-pore broken biochemical cotton, and the water quality is poorer as the upper layer is higher, so the filtering material is correspondingly thin to thick from top to bottom, and the filtering material is replaced after being used for a period of time.
The water treatment process of the fancy carp breeding device comprises the following steps: the culture pond 1 utilizes the rotation centripetal force effect of water flow to gather the particulate matter to the bottom outlet 5 of the center of the bottom of the culture pond 1, the particulate matter automatically flows into the sedimentation tank 8 through the drain pipe 19 connected to the bottom of the culture pond 1, the water overflows and enters the bottom of the hairbrush pond 9 through the water-proof wall after sedimentation, the large particle matter is subjected to physical sedimentation and hairbrush obstruction to realize coarse filtration, the medium particle matter is subjected to biochemical filter cotton (namely cotton swelling) filtration, the medium particle matter is subjected to ultraviolet sterilization and overflows to the clear water pond 11, and the water is circulated back to the culture pond 1 through the water outlet pump. Wherein the micro-particles are filtered through a filter media layer in the trickle flow device 12.
In the above-mentioned water treatment process, the water that contains excrement and debris in the culture pond 1 gets into the sedimentation tank 8 through bottom outlet 5 and drain pipe 19 at the bottom of bottom central authorities, and at the bottom of the heavier pollutant sedimentation tank 8 of aquatic, the rivers of upper portion through the sediment flow into brush pond 9, and the pollutant of great granule and foam are attached to on the brush, and the pollutant of less granule is brought into biochemical pond 10 along with rivers, and less granule is adsorbed the back, and rivers continue to overflow to clear water pond 11, shines through ultraviolet ray disinfection lamp and disinfects.
The precipitated pollutants remaining at the bottom of each filtering tank after filtering are discharged through a sewage discharge pipe 17 arranged at the bottom of the tank.
When the water temperature in the culture pond 1 is too low, the water temperature control unit is started, the operating machine 13 is connected with tap water and a hot water pipe 14, the water is heated and then sent into the circulating hot water pipe 14, the hot water pipe 14 dissipates heat, the temperature of surrounding water flow is increased, and the heated water flow flows into the culture pond 1.
The fancy carp breeding device is improved on the basis of the existing fancy carp breeding system or breeding device, the trickling device 12 is erected above the breeding pond 1, water in the breeding pond 1 enters the trickling device 12 to be filtered and then drips out of the trickling device 12 to enter the breeding pond 1, and water quality purification in the breeding pond 1 can be rapidly carried out; and when water passes through the dripping device 12, the time that the water flow stays outside the culture pond 1 is prolonged, more oxygen can be created, the oxygen content in the culture pond 1 is improved, and the fancy carp can survive in water. Meanwhile, the water flow falling from the dripping device 12 forms an induced flow, so that fish can be blown to one side of the water surface water outlet 4 and flow to the sedimentation tank 8 from the water surface water outlet 4.
In addition, the filter material in the dripping device 12 has a large attachment area, and the non-intermittent water flow can provide required nitrite, so that the culture of nitrobacteria is effectively increased, and the filtering effect is increased.
Meanwhile, under the condition that the temperature of water in the culture pond 1 is low, the water temperature control unit can be started, the operating machine 13 is connected with tap water and the hot water pipe 14, the heated water is sent into the circulating hot water pipe 14, the hot water pipe 14 radiates heat in the treatment pond, so that the temperature of water flow around the hot water pipe 14 is increased, the heated water flow flows into the culture pond 1 to adjust the temperature of the water in the culture pond 1, the growth condition of the koi carps in winter is ensured to be comfortable, the yield is increased, and the economic benefit is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a greenhouse production is with bright and beautiful carp breeding device which characterized in that includes:
the culture unit comprises a culture pond, an oxygen aeration structure, a water inlet and a water outlet, wherein the oxygen aeration structure, the water inlet and the water outlet are connected to the periphery of the culture pond;
the water treatment unit comprises a sedimentation tank, a brush tank, a biochemical tank, a clean water tank and a dripping device, wherein the sedimentation tank, the brush tank, the biochemical tank and the clean water tank are sequentially distributed along the circumferential direction of the culture tank and sequentially carry out water quality treatment, the water inlet is communicated with the clean water tank, and the water outlet is communicated with the sedimentation tank; the drip device is erected above the culture pond;
and the water temperature control unit comprises an operating machine, a hot water pipe and a branch net, wherein the hot water pipe is connected with the operating machine and is coiled on the branch net.
2. The device for cultivating fancy carp for greenhouse production according to claim 1, wherein the dripping device comprises a bracket, a filtering carrying frame and a water supply structure, the water supply structure is positioned on the bracket, and the filtering carrying frame is provided with a filtering filter material which is positioned between the bracket and the water supply structure.
3. The device for cultivating fancy carp in greenhouse according to claim 2, wherein the filter medium is one or more of biochemical balls, biochemical cotton, biochemical felt, rattan cotton and white cotton.
4. The koi breeding device for greenhouse production as claimed in claim 3, wherein the filtering carrying frame is provided with a plurality of layers in a stacked manner, and each layer of the filtering carrying frame contains the same kind of filtering material or contains different filtering materials.
5. The koi breeding device for greenhouse production as claimed in claim 4, wherein the filtering carrying frame is provided with three layers in a stacked manner, and the filtering material contained in each layer of the filtering carrying frame is:
the top layer is made of white cotton and fine-pore biochemical cotton;
the middle layer is a biochemical ball and a mesoporous biochemical cotton;
the bottom layer is coarse-pore biochemical cotton.
6. The cultivation device of fancy carps for greenhouse production according to claim 2, wherein the water supply structure comprises a dripping pipe and a water pump, and water outlets are arranged on the dripping pipe at equal intervals along the length direction.
7. The koi breeding device for greenhouse production according to claim 2, wherein the water outlet comprises a water surface water outlet and a water bottom water outlet, and the dripping device is erected above the side wall of the breeding pond opposite to the water surface water outlet.
8. The koi breeding device for greenhouse production according to claim 1, wherein the breeding pond is provided with an anti-springing plate along a circumferential direction.
9. The koi breeding device for greenhouse production according to claim 1, wherein an overflow port is formed in the side wall of the breeding pond near the upper end.
10. The koi breeding device for greenhouse production according to any one of claims 1 to 9, wherein the hot water pipe is arranged in any one of the treatment tanks of the water treatment unit.
CN202120707580.3U 2021-04-07 2021-04-07 Fancy carp breeding device for greenhouse production Active CN215684251U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120707580.3U CN215684251U (en) 2021-04-07 2021-04-07 Fancy carp breeding device for greenhouse production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120707580.3U CN215684251U (en) 2021-04-07 2021-04-07 Fancy carp breeding device for greenhouse production

Publications (1)

Publication Number Publication Date
CN215684251U true CN215684251U (en) 2022-02-01

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Application Number Title Priority Date Filing Date
CN202120707580.3U Active CN215684251U (en) 2021-04-07 2021-04-07 Fancy carp breeding device for greenhouse production

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