CN213756279U

CN213756279U - Crayfish breeds equipment

Info

Publication number: CN213756279U
Application number: CN202022168566.9U
Authority: CN
Inventors: 陈芝秀; 张克磊; 谢昕; 邓利强; 舒新亚
Original assignee: Sichuan Baidaohu Ecological Agriculture Development Co ltd
Current assignee: Sichuan Baidaohu Ecological Agriculture Development Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-07-23
Anticipated expiration: 2030-09-28

Abstract

The utility model discloses a cray breeds equipment belongs to cray breeding device technical field. The breeding box is at least two, the breeding box is connected with the first water storage box, the first water storage box is connected with the disinfection device, and the disinfection device is connected with the breeding box. The crayfish excrement and urine collecting box can solve the problems that crayfish excrement is accumulated at the bottom of the box, a large amount of bacteria are bred, water quality is polluted, growth and development of crayfish are influenced, and water resources are wasted due to the fact that water is not fully utilized.

Description

Crayfish breeds equipment

Technical Field

The utility model belongs to the technical field of cray breeding device, concretely relates to equipment is bred to cray.

Background

Crayfish is shaped like shrimp and its shell is hard. The length of the finished product is about 5.6-11.9 cm, and the whole color comprises red, reddish brown and pink. The crayfish is a high-quality freshwater shrimp, the fry breeding and the breeding production have obvious seasonality, the contradiction between the breeding production and the market supply and demand is increasingly prominent along with the vigorous market demand of the crayfish, however, sufficient crayfish fries are required for improving the yield of the bred crayfish and the development of a facility and a technology suitable for high-density breeding.

The inventor finds that the prior arts have at least the following technical problems in the practical use process:

crayfish generally need regularly change water at the cultivation in-process, because crayfish lives at the bottom of the case, current way generally falls the log raft on upper strata, and crayfish's excrement and urine is generally at the bottom of the case, and the water of draining the upper strata can't take away crayfish excrement and urine, leads to the excrement to pile up at the bottom of the case easily, breeds a large amount of bacterias, pollutes quality of water, influences the growth and development of crayfish, and the water of changing often is directly poured, does not carry out make full use of to water, extravagant water resource.

Disclosure of Invention

For overcoming above-mentioned not enough that exists, the utility model discloses an inventor continuously reforms transform and innovate through long-term exploration attempt and a lot of experiment and effort, has provided a cray breeds equipment, and it can solve cray excrement and urine and pile up at the bottom of the case, breeds a large amount of bacteriums, pollutes quality of water, influences the growth and development of cray, and does not carry out the problem of make full use of water waste resource to water.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a crayfish breeds equipment, breeds the case including breeding case, first storage water tank and degassing unit, breed the case and have two at least, breed the case and be connected with first storage water tank, first storage water tank is connected with degassing unit, degassing unit with breed the case and be connected.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the breeding box is connected with the first water storage tank through the water outlet pipe.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the breeding box comprises a box body, a first water inlet pipe and a three-way pipe, water is contained in the box body, the three-way pipe is arranged in an inclined mode, an opening in one end, far away from a water outlet pipe, of the upper portion of the three-way pipe is higher than that of the other end of the three-way pipe, the upper portion of the three-way pipe is arranged on the water surface, an opening in the bottom of the three-way pipe is arranged at a position close to the bottom of the box body, an opening in one end of the upper portion of the three-way pipe is connected with the water outlet pipe, and the first water inlet pipe is connected with the box body.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the opening of one end of the upper part of the three-way pipe, which is far away from the water outlet pipe, is sealed, a vent hole is arranged at the sealed position, and the other end of the upper part of the three-way pipe penetrates through the box body to be connected with the water outlet pipe.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: a gap is reserved between the position of the opening at the bottom of the first water inlet pipe and the water surface, and a water pump is arranged on the first water inlet pipe.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the oxygen pipe is arranged under the water surface, one end of the oxygen pipe is connected with the oxygen pump, and the other end of the oxygen pipe is submerged into the water surface.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the bottom of the box body is provided with a nest.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the breeding box is arranged on the support, and a filter screen and an activated carbon layer are arranged in the first water storage tank.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: the disinfection device is an ultraviolet sterilizer.

According to the utility model a crayfish breeds equipment, its further preferred technical scheme is: breed the roof portion and be provided with the second inlet tube, the second inlet tube is connected with second storage water tank.

Compared with the prior art, the technical scheme of the utility model have following advantage beneficial effect:

be provided with three-way pipe and first inlet tube in the box, first inlet tube continuously supplies water, and three-way pipe one end and play water piping connection, unnecessary water flows out from the three-way pipe, realizes the circulation of rivers in the box. The end of the three-way pipe far away from the water outlet pipe is sealed, only the vent hole is left, the outflow of the end of the three-way pipe far away from the water outlet pipe when the water level is too high is prevented, and the vent hole is arranged to enable the air pressure in the three-way pipe to be the same as the outside. The bottom of the three-way pipe is close to the bottom of the box body, the first water inlet pipe is at a certain distance from the water surface, water flows in from the first water inlet pipe and forms convection with the bottom, and the whole water body forms circulation to enable the water quality to be fresh. Meanwhile, when water is discharged, the circulation rate of water at the bottom of the box body is accelerated, and the excrement of a part of crayfish is taken away, so that the sanitation of the breeding environment is guaranteed.

The utility model discloses make clean water rush in from the top, form the convection current with the water that pollutes in bottom, polluted water flows from the bottom, and the water after the outflow stews through first storage water tank and makes partial precipitate deposit, then filter screen and activated carbon layer carry out the secondary to the water and clean, and the disinfection of reentrant degassing unit, then make water follow first inlet tube inflow box in through the water pump in, realize the cyclic utilization of water, improved the utilization ratio of water, practiced thrift the water resource.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is the front structure schematic diagram of the crayfish breeding device of the utility model.

Fig. 2 is the utility model discloses embodiment 1 breeds the structural schematic diagram of case.

Fig. 3 is a side view structure diagram of the three-way pipe in embodiment 2 of the present invention.

Fig. 4 is the utility model discloses embodiment 3 breeds the structural schematic diagram of case.

Fig. 5 is a schematic structural diagram of the first water storage tank of the present invention.

Fig. 6 is a schematic structural view of embodiment 4 of the present invention.

FIG. 7 is a schematic side view of a second water inlet pipe apparatus of the present invention

The labels in the figure are respectively: the device comprises a box body 1, a first water inlet pipe 2, a three-way pipe 3, a nest 4, an oxygen pipe 5, a breeding box 6, a first water storage tank 7, a disinfection device 8, a water outlet pipe 9, a support frame 10, a water pump 11, a second water storage tank 12 and a second water inlet pipe 13; the upper part of the 31 three-way pipe, the bottom of the 32 three-way pipe and a 33 vent hole; 71 a filter screen and 72 an active carbon layer.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Example 1:

as shown in fig. 1, 2 and 5, a crayfish breeding device comprises a box body 1, a first water inlet pipe 2, a three-way pipe 3, a nest 4, a breeding box 6, a first water storage tank 7, a disinfection device 8, a water outlet pipe 9, a support frame 10, a water pump 11, a filter screen 71, an activated carbon layer 72, a second water storage tank 12 and a second water inlet pipe 13. The breeding boxes 6 are arranged on the support frame 10 uniformly, the breeding boxes 6 are connected with the first water storage tank 7 through the water outlet pipe 9, namely, sewage in the breeding boxes 6 flows into the first water storage tank 7 through the water outlet pipe 9, a filter screen and an active carbon layer are arranged in the first water storage tank, the disinfection device 8 is connected with the first water storage tank 7, the disinfection device 8 is an ultraviolet sterilizer, and the ultraviolet sterilizer damages and changes the DNA structure of microorganisms through the irradiation of ultraviolet rays, so that the bacteria die immediately or cannot breed offspring, and the purpose of sterilization is achieved. And the sterilizing device 8 and the breeding box 6 are connected to form a closed loop, and a water pump 11 is arranged on the first water inlet pipe.

Breed case 6 and include box 1, first inlet tube 2, three-way pipe 3 and nest 4, box 1 is cuboid or square, and the function of breeding the water tank is not influenced to the shape of box 1, the splendid attire has the water of take the altitude in the box 1, and box 1 bottom is provided with nest 4, and the cray lives in box 1 bottom. One end of the upper part 31 of the three-way pipe penetrates through the box body 1 to be connected with the external first water inlet pipe 2, and a sealing ring is arranged at the joint of the three-way pipe 3 and the water outlet pipe 9. The three-way pipe 3 is obliquely arranged in water, the opening of one end of the upper part 31 of the three-way pipe, which is far away from the water outlet pipe 9, is higher than the opening of the other end, and the upper part 31 of the three-way pipe is on the water surface under the normal condition. The bottom 32 of the three-way pipe is arranged at a position close to the bottom of the box body 1, namely, the bottom 32 of the three-way pipe has a certain gap from the bottom of the box body 1. The first water inlet pipe 2 is arranged above the water surface, namely, a gap is arranged between the position of the opening at the bottom of the first water inlet pipe 2 and the water surface. Breed 6 tops of case and be provided with second inlet tube 13, second inlet tube 13 is connected with second storage water tank 12, has stored clean water in the second storage water tank 12, can continuously slowly add clean water through second inlet tube 13, guarantees quality of water.

During the use, at first open first inlet tube 2, make water flow in box 1 in, because first inlet tube 2 has certain distance apart from the surface of water, can increase the oxygen content of the water in box 1. When the water level rises in the box 1, the water level of the three-way pipe 3 also rises, because the three-way pipe 3 is placed in an inclined manner, and the position of one end of the water outlet pipe 9 is lower, water flows out along the water outlet pipe 9, the water level in the box 1 is always kept certain, meanwhile, because the bottom 32 of the three-way pipe is close to the bottom of the box 1, the circulation rate of water at the bottom is accelerated, and because crayfishes live at the bottom of the box 1, the excrement of the crayfishes is gathered at the bottom of the box 1, when the water flows out, the partial excrement at the bottom of the box 1 can be brought out, and the sanitation of the breeding environment is ensured.

Sewage in the outlet pipe 9 flows into first water storage tank, and still makes partly sediment of aquatic sink into the case bottom, is provided with the filter screen in the first water storage tank at first, and the filter screen can be the sponge gauze, filters the tiny particle suspended solid through the filter screen, then passes the activated carbon layer through the water of filter screen, absorbs the salinity molecule in the water. When the water-saving water dispenser is required to be used, water flows out of the first water storage tank, enters the disinfection device 8 (ultraviolet sterilizer) to be disinfected and sterilized, and then enters the tank body 1 from the first water inlet pipe 2 through the water pump 11, so that water circulation and water saving are realized. The water in the second water storage tank 12 slowly flows into the breeding tank 6, so that the water source is sufficient, and a part of dirty water is neutralized to ensure the water quality.

Example 2:

as shown in fig. 1, 2, 3 and 5, a crayfish breeding device comprises a box body 1, a first water inlet pipe 2, a three-way pipe 3, a nest 4, a breeding box 6, a first water storage tank 7, a disinfection device 8, a water outlet pipe 9, a support frame 10 and a water pump 11; the upper part 31, the lower part 32, the vent hole 33, the filter screen 71, the activated carbon layer 72, the second water storage tank 12 and the second water inlet pipe 13. The breeding boxes 6 are arranged on the support frame 10 uniformly, the breeding boxes 6 are connected with the first water storage tank 7 through the water outlet pipe 9, namely, sewage in the breeding boxes 6 flows into the first water storage tank 7 through the water outlet pipe 9, a filter screen 71 and an active carbon layer 72 are arranged in the first water storage tank, the disinfection device 8 is connected with the first water storage tank 7, the disinfection device 8 is an ultraviolet sterilizer, and the ultraviolet sterilizer damages and changes the DNA structure of microorganisms through the irradiation of ultraviolet light, so that the bacteria die immediately or cannot breed offspring, and the purpose of sterilization is achieved. And the sterilizing device 8 and the breeding box 6 are connected to form a closed loop, and a water pump 11 is arranged on the first water inlet pipe.

Breed case 6 and include box 1, first inlet tube 2, air vent 33, three-way pipe 3 and nest 4, box 1 is cuboid or square, and the function of breeding the water tank is not influenced to the shape of box 1, be provided with the water of take the altitude in the box 1, 1 bottoms of box are provided with nest 4, and the crayfish lives in 1 bottoms of box. One end of the upper part 31 of the three-way pipe penetrates through the box body 1 to be connected with an external water outlet pipe, and a sealing ring is arranged at the joint of the three-way pipe 3 and the water outlet pipe 9. The three-way pipe 3 is obliquely arranged in water, an opening at one end of the upper part 31 of the three-way pipe, which is far away from the water outlet pipe 9, is higher than an opening at the other end, an opening at one end of the upper part 31 of the three-way pipe, which is far away from the water outlet pipe 9, is sealed, an air vent 33 is arranged at the sealed position, and the upper part 31 of the three-way pipe is on the water surface under the normal condition. The bottom 32 of the three-way pipe is arranged at a position close to the bottom of the box body 1, namely, the bottom 32 of the three-way pipe has a certain gap from the bottom of the box body 1. The first water inlet pipe 2 is arranged above the water surface, namely, a gap is arranged between the position of the opening at the bottom of the first water inlet pipe 2 and the water surface. Breed 6 tops of case and be provided with second inlet tube 13, second inlet tube 13 is connected with second storage water tank 12, has stored clean water in the second storage water tank 12, can continuously slowly add clean water through second inlet tube 13, guarantees quality of water.

During the use, at first open first inlet tube 2, make water flow in box 1 in, because first inlet tube 2 has certain distance apart from the surface of water, can increase the oxygen content of the water in box 1. When the water level in the box body 1 rises, the water level of the three-way pipe 3 also rises, and because the three-way pipe 3 is obliquely arranged and the position of one end connected with the water outlet pipe 9 is lower, water flows out along the water outlet pipe 9. The device is also sealed at the opening of the upper part 31 of the three-way pipe far away from the water outlet pipe 9, only a vent hole 33 is left, so that water is prevented from flowing out from the end far away from the water outlet pipe 9 due to overhigh water level, and the air pressure in the pipe is consistent with the external air pressure due to the vent hole 33. Meanwhile, the circulation rate of water at the bottom is accelerated during water drainage because the bottom 32 of the three-way pipe is close to the bottom of the box body 1, and partial excrement at the bottom of the box body 1 is brought out when the water flows out because the crayfishes live at the bottom of the box body 1 and the excrement is gathered at the bottom of the box body 1, so that the sanitation of the culture environment is guaranteed.

Example 3:

as shown in fig. 1, 4 and 5, a crayfish breeding device comprises a box body 1, a first water inlet pipe 2, a three-way pipe 3, a nest 4, an oxygen pipe 5, a breeding box 6, a first water storage tank 7, a disinfection device 8, a water outlet pipe 9, a support frame 10, a water pump 11, a filter screen 71, an activated carbon layer 72, a second water storage tank 12 and a second water inlet pipe 13. The breeding boxes 6 are arranged on the support frame 10 uniformly, the breeding boxes 6 are connected with the first water storage tank 7 through the water outlet pipe 9, namely, sewage in the breeding boxes 6 flows into the first water storage tank 7 through the water outlet pipe 9, a filter screen 71 and an active carbon layer 72 are arranged in the first water storage tank, the disinfection device 8 is connected with the first water storage tank 7, the disinfection device 8 is an ultraviolet sterilizer, and the ultraviolet sterilizer damages and changes the DNA structure of microorganisms through the irradiation of ultraviolet light, so that the bacteria die immediately or cannot breed offspring, and the purpose of sterilization is achieved. And the sterilizing device 8 and the breeding box 6 are connected to form a closed loop, and a water pump 11 is arranged on the first water inlet pipe.

Breed case 6 and include box 1, first inlet tube 2, three-way pipe 3, nest 4 and oxygen hose 5, box 1 is cuboid or square, and the function of breeding the water tank is not influenced to the shape of box 1, be provided with the water of take the altitude in the box 1, 1 bottoms of box are provided with nest 4, and the crayfish lives in 1 bottoms of box. One end of the upper part 31 of the three-way pipe penetrates through the box body 1 to be connected with the external first water inlet pipe 2, and a sealing ring is arranged at the joint of the three-way pipe 3 and the water outlet pipe 9. The three-way pipe 3 is obliquely arranged in water, the opening of one end of the upper part 31 of the three-way pipe, which is far away from the water outlet pipe 9, is higher than the opening of the other end, and the upper part 31 of the three-way pipe is on the water surface under the normal condition. The bottom 32 of the three-way pipe is arranged at a position close to the bottom of the box body 1, namely, the bottom 32 of the three-way pipe has a certain gap from the bottom of the box body 1. The first water inlet pipe 2 is arranged above the water surface, namely, a gap is arranged between the position of the opening at the bottom of the first water inlet pipe 2 and the water surface. The oxygen pipe 5 is submerged under the water surface, and the other end of the oxygen pipe is connected with an external oxygen pump. Breed 6 tops of case and be provided with second inlet tube 13, second inlet tube 13 is connected with second storage water tank 12, has stored clean water in the second storage water tank 12, can continuously slowly add clean water through second inlet tube 13, guarantees quality of water.

Sewage in the outlet pipe 9 flows into first water storage tank, and still makes partly sediment of aquatic sink into the case bottom, is provided with the filter screen in the first water storage tank at first, and the filter screen can be the sponge gauze, filters the tiny particle suspended solid through the filter screen, then passes the activated carbon layer through the water of filter screen, absorbs the salinity molecule in the water. When the water-saving water dispenser is required to be used, water flows out of the first water storage tank, enters the disinfection device 8 (ultraviolet sterilizer) to be disinfected and sterilized, and then enters the tank body 1 from the first water inlet pipe 2 through the water pump 11, so that water circulation and water saving are realized. The water in the second water storage tank 12 continuously and slowly flows into the breeding tank 6, so that the water source is sufficient, and a part of dirty water is neutralized to ensure the water quality.

Example 4:

as shown in fig. 1, 3, 5, 6 and 7, a crayfish breeding device comprises a box body 1, a first water inlet pipe 2, a three-way pipe 3, a nest 4, an oxygen pipe 5, a breeding box 6, a first water storage tank 7, a disinfection device 8, a water outlet pipe 9, a support frame 10, a water pump 11, a filter screen 71, an activated carbon layer 72, a second water storage tank 12 and a second water inlet pipe 13. The breeding boxes 6 are arranged on the support frame 10 uniformly, the breeding boxes 6 are connected with the first water storage tank 7 through the water outlet pipe 9, namely, sewage in the breeding boxes 6 flows into the first water storage tank 7 through the water outlet pipe 9, a filter screen 71 and an active carbon layer 72 are arranged in the first water storage tank, the disinfection device 8 is connected with the first water storage tank 7, the disinfection device 8 is an ultraviolet sterilizer, and the ultraviolet sterilizer damages and changes the DNA structure of microorganisms through the irradiation of ultraviolet light, so that the bacteria die immediately or cannot breed offspring, and the purpose of sterilization is achieved. And the sterilizing device 8 and the breeding box 6 are connected to form a closed loop, and a water pump 11 is arranged on the first water inlet pipe.

Breed case 6 and include box 1, first inlet tube 2, three-way pipe 3, nest 4 and oxygen hose 5, box 1 is cuboid or square, and the function of breeding the water tank is not influenced to the shape of box 1, be provided with the water of take the altitude in the box 1, 1 bottoms of box are provided with nest 4, and the crayfish lives in 1 bottoms of box. One end of the upper part 31 of the three-way pipe penetrates through the box body 1 to be connected with the external first water inlet pipe 2, and a sealing ring is arranged at the joint of the three-way pipe 3 and the water outlet pipe 9. The three-way pipe 3 is horizontally arranged in water, the upper part 31 of the three-way pipe is normally on the water surface, the opening of one end of the upper part 31 of the three-way pipe, which is far away from the water outlet pipe 9, is sealed, a vent hole 33 is arranged at the sealed position, and the vent hole 33 is arranged at the upper position to prevent water from flowing out of the hole. The bottom 32 of the three-way pipe is arranged at a position close to the bottom of the box body 1, namely, the bottom 32 of the three-way pipe has a certain gap from the bottom of the box body 1. The first water inlet pipe 2 is arranged above the water surface, namely, a gap is arranged between the position of the opening at the bottom of the first water inlet pipe 2 and the water surface. The oxygen pipe 5 is submerged under the water surface, and the other end of the oxygen pipe is connected with an external oxygen pump. Breed the roof portion and be provided with the second inlet tube, the second inlet tube is connected with the second storage water tank, and clean water has been stored in the second storage water tank, can continuously slowly add clean water through the second inlet tube, guarantees quality of water.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The crayfish breeding device is characterized by comprising at least two breeding boxes, a first water storage tank and a disinfection device, wherein the breeding boxes are connected with the first water storage tank, the first water storage tank is connected with the disinfection device, and the disinfection device is connected with the breeding boxes.

2. The crayfish breeding device as claimed in claim 1, further comprising a water outlet pipe, wherein the breeding tank is connected with the first water storage tank through the water outlet pipe.

3. The crayfish breeding device as claimed in claim 2, wherein the breeding box comprises a box body, a first water inlet pipe and a three-way pipe, water is contained in the box body, the three-way pipe is arranged in an inclined mode, the opening of the upper portion of the three-way pipe, which is far away from the water outlet pipe, is higher than the opening of the other portion of the three-way pipe, the upper portion of the three-way pipe is arranged on the water surface, the opening of the bottom portion of the three-way pipe is arranged close to the bottom of the box body, the opening of the upper portion of the three-way pipe, which is.

4. The crayfish breeding device as claimed in claim 3, wherein the upper end of the three-way pipe, which is far away from the water outlet pipe, is sealed, a vent hole is arranged at the sealed position, and the other end of the upper part penetrates through the box body and is connected with the water outlet pipe.

5. The crayfish breeding device as claimed in claim 4, wherein a gap is provided between the position of the opening at the bottom of the first water inlet pipe and the water surface, and a water pump is provided on the first water inlet pipe.

6. The crayfish breeding device as claimed in claim 4, further comprising an oxygen pipe, wherein one end of the oxygen pipe is connected to an oxygen pump, and the other end of the oxygen pipe is submerged in the water.

7. The crayfish breeding device as claimed in claim 5 or 6, wherein the bottom of the box is provided with a nest.

8. The crayfish breeding device as claimed in claim 7, further comprising a support frame, wherein the breeding boxes are arranged on the support frame, and a filter screen and an activated carbon layer are arranged in the first water storage tank.

9. The crayfish breeding apparatus as claimed in claim 1, wherein the sterilizing device is an ultraviolet sterilizer.

10. The crayfish breeding device as claimed in claim 8, wherein a second water inlet pipe is arranged at the top of the breeding box and is connected with a second water storage box.