Centralized hatching net cage for egg-carrying crayfishes

Abstract

The utility model discloses an egg-carrying crayfish concentrated incubation net cage which comprises a structural framework, a supporting beam is of a hollow structure, meshes are arranged on the periphery and the bottom of the structural framework, and an escape-preventing assembly is arranged on the top of the structural framework and used for shielding the four corners of the top of the structural framework. A floating unit is arranged on the structural framework and is used for enabling the structural framework to float in water; according to the utility model, the meshes are arranged at the periphery and the bottom of the structural framework of the incubator, and the aperture of the meshes at the periphery of the structural framework is larger than that of the meshes at the bottom of the structural framework, so that juvenile crayfishes can freely enter and exit from the incubator through the meshes with large aperture on the side surface of the structural framework after being separated; the phenomenon that parent seed shrimps eat shrimp seeds and big shrimp seeds eat small shrimp seeds due to insufficient feeding or overlarge density can be avoided, and batch collection of the shrimp seeds is facilitated; meanwhile, the polyethylene film protruding inwards is arranged at the top of the structural framework, so that the crayfish can be further prevented from escaping from the incubator.

Description

Technical Field

[0001] This utility model belongs to the field of crayfish breeding technology, specifically relating to a centralized hatching net cage for berried crayfish. Background Technology

[0002] When farming crayfish, they need to reproduce by carrying eggs. Carrying crayfish typically require a relatively independent space for breeding. Traditionally, there is no special breeding and incubation system for carrying eggs, which often leads to increased mortality during breeding or the death of hatchlings. Some existing technologies use incubation boxes for breeding, but these boxes usually have uniform mesh sizes on all four sides to prevent escape. If the mesh size at the bottom of the incubation box is too large, food may fall out; if the mesh size is too small, juvenile crayfish and parent crayfish will live in the same box. Insufficient feeding can lead to parent crayfish eating larvae, and larger larvae eating smaller larvae. Furthermore, the technical challenge of collecting fry during crayfish hatching and breeding has always plagued many practitioners. Utility Model Content

[0003] The purpose of this invention is to provide a centralized hatching net cage for berried crayfish. By setting nets around the perimeter and bottom of the hatching cage's structural frame, with the mesh size of the nets around the perimeter being larger than that of the nets at the bottom, juvenile crayfish can freely enter and exit the hatching cage through the larger mesh size on the side of the structural frame after hatching. This can prevent the phenomenon of parent crayfish eating juveniles and larger juveniles eating smaller juveniles caused by insufficient feeding or excessive density. It also enables timely separation of juvenile crayfish after hatching, achieving the goal of large-scale collection of crayfish larvae.

[0004] This utility model is achieved through the following technical solution:

[0005] A centralized hatching cage for berried crayfish includes a structural frame, the supporting beams being hollow, mesh panels being provided around the perimeter and bottom of the structural frame, an escape-prevention component being provided at the top of the structural frame to cover the four corners of the top of the structural frame, and a floating unit being provided on the structural frame to make the structural frame float in the water.

[0006] Furthermore, the mesh apertures around the structural frame are larger than the mesh apertures at the bottom of the structural frame.

[0007] Furthermore, the mesh aperture around the structural skeleton is 1 cm.

[0008] Furthermore, the mesh aperture at the bottom of the structural skeleton is 2-3 mm.

[0009] Furthermore, the floating unit includes four floating components, each with a mounting hole in the center. The floating components are fitted onto the support beams around the structural frame, and each floating component is equipped with an adjustment assembly for adjusting the height of the floating component on the structural frame.

[0010] Furthermore, the adjustment assembly includes a connector and at least one adjustment bolt. The connector includes a support portion and a fixing portion. The fixing portion is sleeved on the support beams around the structural frame. The support portion is connected to the fixing portion and the floating component respectively. The adjustment bolt passes through the fixing portion and abuts against the structural frame.

[0011] Furthermore, the escape prevention component includes a polyethylene film and ropes. The polyethylene film has a central opening structure and is arranged around the top of the structural frame. The ropes are arranged at the four corners of the polyethylene film and are used to tighten the polyethylene film.

[0012] Furthermore, the bottom of the structural skeleton is provided with several breeding nests, each of which is a cylindrical structure with an open end, and contains multiple independent breeding chambers.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1) In this utility model, by setting mesh panels around the perimeter and bottom of the incubation box, and with the mesh panel around the perimeter having a larger aperture than the mesh panel at the bottom, the food fed to the incubator will not fall through the gaps in the bottom mesh panel. In addition, after the crayfish larvae are separated from their parents, they can freely enter and exit the incubation box through the large-aperture mesh panels on the side of the structural frame. This can prevent the phenomenon of parent crayfish eating larvae and large larvae eating small larvae due to insufficient feeding or excessive density, and it is also conducive to the mass collection of larvae. At the same time, an inwardly protruding polyethylene film is set at the top of the structural frame to further prevent crayfish from escaping from the incubation box.

[0015] 2) In this utility model, by setting a mesh and a floating unit on the structural frame of the hatching box, and setting multiple breeding nests at the bottom of the structural frame, the floating unit can adjust the floating height of the structural frame in the breeding pond, so that the breeding nests at the bottom can be in a suitable water depth, and the structural frame can float stably in the breeding pond, which is conducive to the survival of shrimp larvae. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the centralized hatching net cage for berried crayfish of this utility model.

[0018] Among them: 1-Structural skeleton, 2-Supporting beam, 3-Mesh, 4-Floating component, 5-Connector, 51-Supporting part, 52-Fixing part, 6-Adjusting bolt, 7-Polyethylene film, 8-Breeding nest. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] Example 1:

[0021] The main structure of this embodiment is a net cage for centralized incubation of berried crayfish, such as... Figure 1 As shown, the structure includes a structural frame 1, a hollow support beam 2, mesh panels 3 on all four sides and bottom of the structural frame 1, and an escape-prevention component on top of the structural frame 1 to cover the four corners of the top of the structural frame 1. A floating unit is provided on the structural frame 1 to allow it to float in water. The mesh panels 3 around the structural frame 1 have a larger aperture than the mesh panels 3 at the bottom of the structural frame 1. The mesh panels 3 around the structural frame 1 have an aperture of 1 cm, while the mesh panels 3 at the bottom of the structural frame 1 have an aperture of 2-3 mm. Several breeding nests 8 are provided at the bottom of the structural frame 1. Each breeding nest 8 has a cylindrical structure with an open end and contains multiple independent breeding chambers. The escape-prevention component includes a polyethylene film 7 and ropes. The polyethylene film 7 has an open center and is located around the top of the structural frame 1. The ropes are located at the four corners of the polyethylene film 7 and are used to tighten the polyethylene film 7.

[0022] The structural frame 1 is a cube, with its supporting beams 2 made of hollow PVC tubes. The joints are glued together using PVC T-joints. Mesh panels 3 are installed around the perimeter and bottom of the structural frame 1, with the mesh size of the perimeter mesh 3 being larger than that of the bottom mesh 3. The perimeter mesh has a 1cm mesh size, while the bottom mesh has a 3mm mesh size. After hatching, the crayfish larvae have a body width of approximately 0.7-0.8cm. They can freely enter and exit the hatching box through the large-diameter mesh panels 3 on the sides of the structural frame 1, preventing the broodstock from eating the larvae or the larvae from eating the smaller ones due to insufficient feeding or overcrowding. Furthermore, the smaller mesh size of the bottom mesh panels 3 prevents food from falling out during feeding. An escape-prevention component is also installed at the top of the structural frame 1. The escape-prevention components include a polyethylene film 7 and ropes. The polyethylene film 7 is installed around the top of the structural frame 1, with an opening in the center. The polyethylene film 7 not only prevents crayfish from escaping from the top of the structural frame 1, but also blocks ultraviolet rays. Ropes are installed at the four corners of the polyethylene film 7. Tightening the ropes maximizes the opening of the polyethylene film 7, allowing crayfish to be exposed to sunlight when the ultraviolet rays are not strong. Floating units are installed around the structural frame 1, and the netting 3 around the structural frame 1 wraps around the floating units inside, allowing the structural frame 1 to float stably in the water. Several breeding nests 8 are installed on the netting 3 at the bottom of the structural frame 1. Crayfish can carry eggs and reproduce in the breeding nests 8. The breeding nest 8 is a cylindrical structure with an opening at one end and multiple independent breeding chambers inside, into which crayfish can enter to reproduce.

[0023] Example 2:

[0024] This embodiment, based on the above embodiment, further defines a floating unit, which includes four floating components 4. Each floating component 4 has a mounting hole in its center and is fitted onto the support beams 2 around the structural frame 1. Each floating component 4 is equipped with an adjustment assembly for adjusting the height of the floating component 4 on the structural frame 1. The adjustment assembly includes a connector 5 and at least one adjusting bolt 6. The connector 5 includes a support part 51 and a fixing part 52. The fixing part 52 is fitted onto the support beams 2 around the structural frame 1. The support part 51 is connected to both the fixing part 52 and the floating component 4. The adjusting bolt 6 passes through the fixing part 52 and abuts against the structural frame 1.

[0025] The floating unit includes four floating components 4. Each floating component 4 has a hollow, sealed structure with a through hole in its center. The floating components 4 are fitted onto the support beams 2 surrounding the structural frame 1. An adjustment assembly is provided on each floating component 4, comprising a connector 5 and three adjusting bolts 6. The connector 5 includes multiple connecting parts and a fixing part 52. The connecting parts are connected to the fixing part 52 and the ends of the floating components 4, respectively. The three adjusting bolts 6 pass through the fixing part 52 and abut against the surface of the support beams 2 of the structural frame 1. Tightening the three adjusting bolts 6 fixes the floating components 4 to the support beams 2. To adjust the buoyancy of the structural frame 1 above the water surface, simply adjust the floating components 4 downwards towards the support beams 2. Other parts of this embodiment are the same as those in the previous embodiment and will not be repeated here.

[0026] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A concentrated hatching net cage for procambarus clarkii, characterized by, The application relates to a structure framework, which comprises a plurality of supporting beams, the supporting beams are hollow structures, the structure framework is provided with a mesh on the periphery and the bottom, the top of the structure framework is provided with an anti-escape assembly for shielding the four corners of the top of the structure framework, and a floating unit is arranged on the structure framework and used for floating the structure framework in water.

2. The concentrated hatching tank for egg-carrying crayfish according to claim 1, wherein The mesh on the periphery of the structure framework has a larger aperture than the mesh on the bottom of the structure framework.

3. The concentrated hatching tank for egg-carrying crayfish according to claim 2, wherein The aperture of the mesh on the periphery of the structure framework is 1 cm.

4. The concentrated hatching tank for egg-carrying crayfish according to claim 2, wherein The aperture of the mesh on the bottom of the structure framework is 2-3 mm.

5. The concentrated hatching tank for red swamp crayfish holding eggs as claimed in claim 1, characterized in that, The floating unit comprises four floating pieces, the middle of the floating pieces is provided with a mounting hole, the floating pieces are sleeved on the supporting beams on the periphery of the structure framework, the floating pieces are provided with an adjusting assembly, and the adjusting assembly is used for adjusting the height of the floating pieces on the structure framework.

6. The concentrated hatching tank for egg-carrying crayfish according to claim 5, characterized in that, The adjusting assembly comprises a connecting piece and at least one adjusting bolt, the connecting piece comprises a supporting part and a fixing part, the fixing part is sleeved on the supporting beams on the periphery of the structure framework, the supporting part is connected with the fixing part and the floating piece respectively, and the adjusting bolt is in abutment with the structure framework through the fixing part.

7. The concentrated hatching tank for red swamp crayfish holding eggs as claimed in claim 1, characterized in that, The anti-escape assembly comprises a polyethylene film and a rope, the polyethylene film is an open-middle structure, the polyethylene film is arranged on the periphery of the top of the structure framework, the rope is arranged at the four corners of the polyethylene film, and the rope is used for tightening the polyethylene film.

8. The concentrated hatching tank for red swamp crayfish holding eggs as claimed in claim 1, characterized in that, The bottom of the structure framework is provided with a plurality of breeding nests, the breeding nests are cylindrical structures, one end of the breeding nests is open, and a plurality of independent breeding cavities are arranged in the breeding nests.

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