CN202722261U - Crab pot and land-based crab breeding device formed thereby - Google Patents

Abstract

The utility model discloses a crab cage. The crab cage is a box body, the front of which is provided with inlets and outlets for feeding and feeding crabs, and the side is provided with inlets and outlets for connecting to water supply pipes, air supply pipes and sewage pipes. Three sets of holes are paired, and a drain hole is arranged on the bottom surface, and a cover plate is movably connected to the inlet and outlet. The utility model also discloses a land-based crab raising device composed of the crab cage. The crab cages of the utility model can be freely combined and superimposed to realize three-dimensional land-based breeding. The breeding density can be increased several times compared with the traditional breeding mode, and the breeding site is not limited; each crab cage of the utility model only raises one crab, 100 % prevents crabs from killing each other and improves their survival rate; harvesting is convenient and reduces harvesting costs; after harvesting, the crab body is complete, which is beneficial to improving its economic benefits.

Description

A kind of crab pot and the land-based crab raising device composed of it

technical field

The utility model relates to a crab cage suitable for aquaculture economic crabs, and also relates to a land-based crab cultivation device composed of the cage.

Background technique

Economic crabs, such as blue crabs and portunus trituberculatus, are large-scale marine crabs. They are traditional rare and precious cultured species, and they are also an important part of the mariculture industry. Portunus trituberculatus is widely distributed in sea areas of my country, Japan and Korea. Portunus trituberculatus has delicate meat and delicious taste. According to the analysis of the Chinese Academy of Preventive Medicine and other units, Portunus trituberculatus is rich in various high-protein substances and multi-vitamins. It is not only delicious to eat, but also can be used as medicine as a tonic. The region, Hong Kong, and Macao have been listed as seafood products and tonics, and there is a great market demand.

Portunus trituberculatus belongs to benthic animal feeding habits, mainly feeding on bivalves, namely shellfish, followed by crustaceans, cephalopods, fish and gastropods. Portunus trituberculatus has regular activities, and it is often nocturnal. It mostly looks for food at night and has obvious phototaxis. Likes to live on sandy or muddy bottoms. When resting, dig the sand with the last pair of feet, ambush yourself, expose the eyes and tentacles outside the sand, or hide in rocks and reefs. When molting, they often hide under rocks or among seaweeds, and do not come out until the molting is complete and the new shell hardens. Swimming crabs are ferocious and aggressive, with obvious cannibalism. the

The cultivation of Portunus trituberculatus requires clean water, and its adaptability to temperature and salinity is relatively wide. Portunus trituberculatus has a certain ability to withstand dryness, and within a certain range, it decreases with the increase of temperature. Adult Portunus trituberculatus generally weigh about 100g. At a temperature of about 20°C, it will not die if exposed to the air for 8 hours. At a temperature of 2°C-4°C, exposed to the air for 26 hours, the survival rate is as high as 87.8%. However, with the industrialized development of the aquaculture industry, environmental pollution in sea areas and the aquaculture industry's own pollution have become increasingly serious, and problems such as quality degradation of aquaculture products, serious diseases, and overfishing of seed resources have emerged, which have become bottlenecks restricting production development. How to improve product quality and economic benefit is an urgent problem to be solved at present.

In recent years, due to the sharp decline of marine resources year by year, the environmental pollution of sea areas and the pollution of aquaculture itself have become increasingly serious, although artificial aquaculture in traditional ponds has gradually emerged, the output and quality are far from meeting the needs of domestic and foreign markets. Every autumn and winter season, the supply of goods in the market is very small, resulting in high product prices, and the contradiction between supply and demand is becoming increasingly prominent.

At present, the massaging of blue crabs and swimming crabs still mainly relies on traditional experience in breeding and disease control techniques, with a low level of innovation and new technology application. There is still a problem of relying on the weather and uneven production. In terms of economic crab farming in seawater, my country currently basically uses the traditional multi-species polyculture model of fish, shrimp, and crabs. Most of the research on its farming model and breeding capacity is still in the experimental research stage, and its output and benefits Both are low. Crab cultivation in ponds along the southern coast of my country is an extensive traditional farming method, which has poor defense against disastrous weather such as typhoons and cold waves, and has a weak ability to resist risks. For example, under the continuous cold wave weather from January to February 2008, almost all the aquatic products in the pond were frozen to death, causing heavy losses to the aquaculture industry. Therefore, it is urgent to carry out the research on the ecological economical crab high-yield three-dimensional breeding model, core technology and supporting equipment, and build the economical crab three-dimensional breeding technology.

Utility model content

The technical problem to be solved by the utility model is to provide a crab cage suitable for aquaculture economic crabs. The crab cage can realize separate and three-dimensional land-based cultivation, which is beneficial to improve the breeding density, survival rate and economic benefits of crabs. .

The utility model adopts the following technical solutions to achieve the purpose of the invention: a crab cage, the crab cage is a box body, the front is provided with an inlet and outlet for feeding and crabs, and its side is provided with a water supply pipe, The air supply pipe and the sewage pipe are perforated in three pairs, and the bottom surface is provided with a sewage hole, and a cover plate is movably connected to the inlet and outlet.

Set a cover plate on the entrance and exit to prevent the crabs in the cage from escaping. Open the cover plate and put the crabs into the crab cages. One crab per cage is fed and raised. The holes are connected to the crab cage to adjust the circulation of water and airflow inside the crab cage.

The central part of the front of the crab cage protrudes to form an inclined platform, and the inlet and outlet are arranged on the inclined platform, which is convenient for putting in or taking out the crabs inside through the inlet and outlet provided on the protruding inclined platform, and is also convenient for feeding and observing.

The cover plate is provided with openings, and a through hole is set on the cover plate. On the one hand, it has the effect of a handle, which is convenient for operation to open or close the cover plate. On the other hand, it is more conducive to promoting the air circulation in the cage.

The upper end surface and the lower end surface of the crab cage are respectively provided with positioning structures for superimposition with other crab cages, so that the overall structure is more stable after the crab cages are stacked.

The crab cage is formed by injection molding of polyethylene material, which is conducive to strengthening the corrosion resistance of the crab cage, and at the same time makes the crab cage light and strong, has good wear resistance and low price, and is convenient for large-scale popularization and application. the

The utility model also provides a land-based crab raising device composed of the above-mentioned crab cages, which realizes full manual control of the crab breeding environment and improves the risk resistance ability of the crab breeding.

A crab raising device, the crab raising device is composed of one layer of cages or more than two layers of cages stacked up and down, each layer of cages is composed of one crab cage or more than two crab cages pass through the side connected in series, the pair of perforations at the corresponding positions on the side of the crab cage in each layer are located on a straight line;

The three pairs of perforations of the crab cages in each layer below the top layer of crab cages respectively have water supply pipes, air supply pipes and sewage pipes corresponding to each other. Internally connected, the sewage pipe is connected to the sewage hole at the bottom of the crab cage on the upper floor through the vertical end of the T-shaped tee joint inside each crab cage;

The three groups of pairs of perforations on the top floor of the crab cage are respectively horizontally pierced with water supply pipes and air supply pipes in two groups;

Below the bottom row of cages, a sewage pipe is additionally provided, and the sewage pipe is connected with the sewage holes of each crab cage on the bottom row of cages through a T-shaped tee joint;

The water supply pipe, air supply pipe and sewage pipe are also provided with control valves to adjust the control valves located on the water supply pipe, air supply pipe and sewage pipe to control the air flow and water circulation in the crab farming device.

As a further improvement of the utility model: each crab cage of the crab raising device is provided with a pipe section for regulating the depth of the culture water stored inside the crab cage, and the lower end of the pipe section is inserted into the sewage hole at the bottom of the crab cage. The vertical end of the connected T-shaped tee joint, and its outer diameter is adapted to the inner diameter of the vertical end to achieve sealing. Change the length of the pipe section inserted in the vertical end of the T-shaped tee joint, so that the culture water stored in the crab cage reaches a suitable height.

The bottom surface of the crab cage is covered with a layer of fine sand, which can increase the sand-submerging activities of the crabs and is beneficial to the self-cleaning of the crab bodies.

The control valve on the water supply pipe and the air supply pipe is located at the end where the upper tee joint communicates with each crab cage, and the control valve on the sewage discharge pipe is located at the total discharge end of the sewage discharge pipe. By adjusting the control valve on the water supply pipe, the balance of the in and out of the aquaculture water can be adjusted to prevent the water inlet speed from being greater than the drainage speed; The control valve on the air supply pipe avoids waste of resources; the control valve of the sewage pipe is located at the main discharge end, which is more convenient for control.

The upper end surface of the crab cage on the top layer of the crab raising device is provided with a top cover plate, and the top cover plate is provided with a sieve hole, on the one hand, it is beneficial to prevent the crabs from escaping, and on the other hand, it is beneficial to reduce the light in the cage, which is more suitable for crabs. The survival of the species; multiple openings are set on the top cover, which is also conducive to the air circulation in the cage.

Compared with the prior art, the utility model has the following beneficial effects:

1) The crab cages of this utility model can be freely combined and superimposed to realize three-dimensional land-based breeding. The breeding density can be increased several times compared with the traditional breeding mode, and the breeding site is not limited; each crab cage of the utility model only raises one crab , 100% prevent crabs from killing each other and improve their survival rate; harvesting is convenient and reduces harvesting costs; after harvesting, the crab body is complete, which is conducive to improving its economic benefits;

2) The crab raising device of the utility model is equipped with water supply pipes, air supply pipes and sewage pipes, etc., forming a fully artificially controlled high-density breeding space, which is less affected by the external environment, and the breeding environment such as water quality, temperature and salinity of the breeding water body etc. are easy to control, help to promote the growth of crabs, reduce the occurrence of diseases, and the survival rate can reach more than 80%;

3) The traditional culture mode is fixed on the same plane. The utility model injects suitable water into each crab cage to create a suitable environment and realize water storage and culture. Each crab cage is equivalent to a complete pond or Cement ponds, after stacking crab cages, are equivalent to breeding on multiple planes at the same time, making full use of the water body space.

Description of drawings

Fig. 1 is the three-dimensional view one of the crab pot of preferred embodiment of the present invention;

Fig. 2 is the perspective view two of the crab cage of the preferred embodiment of the present invention;

3 is a perspective view of Embodiment 1 of the crab raising device of the present invention;

Fig. 4 is the installation sketch map of water supply pipe, air supply pipe and blowdown pipe of the utility model;

Fig. 5 is a perspective view of Embodiment 2 of the crab raising device of the present invention.

Detailed ways

Fig. 1, 2 are the three-dimensional views of the crab cage of the present utility model, as shown in the figure, the crab cage 1 is a box body, adopts polyethylene material injection pressure to form, and its front middle part protrudes to the outside of the crab cage, forming an inclined platform, The inlet and outlet 2 for feeding and feeding portunus trituberculatus is set on the inclined platform, and the left and right sides of the inlet and outlet 2 are provided with pallets 3, and the two sides of the cover plate 4 for opening and closing the inlet and outlet 2 are supported on the pallet 3, the cover plate 4 is provided with three through holes 5. The upper end surface of the crab cage 1 is provided with a positioning piece 6, and the lower end surface is provided with a positioning groove, so that the crab cage and other crab cages are stacked up and down. The side of the crab cage 1 is provided with three pairs of perforations for accessing water supply pipes, air supply pipes and sewage pipes (not shown), one large and two small, and the bottom surface is provided with sewage holes connected to the sewage structure, and the larger one is used for accessing sewage Tube.

As shown in Figure 3, it is a crab raising device composed of crab cages in Figures 1 and 2. The crab raising device is formed by stacking three layers of row cages, and each layer of row cages is composed of four crab cages 1 connected in series through the sides. Forming, each crab cage 1 upper end surface on the top row of cages is provided with a top cover plate 16, and the top cover plate 16 is provided with a sieve hole, and the opposite perforations at the corresponding positions of each crab cage 1 side in each layer are located in a straight line. superior. Among the three groups of pairs of perforations on the top floor of the crab cage, water supply pipes 8 and air supply pipes 9 are traversed respectively in the smaller two groups of diameters, and the larger pair of perforations of another group of diameters is vacant. Obviously, there is no need to add sewage pipes here. The three groups of crab cages in the second and third floors below the top floor crab cage are respectively horizontally pierced with water supply pipe 8, air supply pipe 9 and sewage pipe 7 corresponding in the perforation, wherein, as shown in Figure 4, water supply pipe 8 And air supply pipe 9 is communicated with in the cage by three-way joint 10,11 respectively in each crab cage 1 inside, and is provided with control valve on one end of the three-way joint 10,11 that is communicated with in the cage, and blowdown pipe 7 is then in each crab cage. The interior of the cage 1 communicates with the sewage hole at the bottom of the crab cage 1 on the upper floor through the vertical end 13 of the T-shaped tee joint 12, and the control valve on the sewage pipe 7 is located at the total discharge end of the sewage pipe to facilitate unified control Drainage of crab cages is convenient and fast; a drainpipe 7 is arranged below the third layer of cages in the bottom layer, which is connected to the drain holes of each crab cage 1 on the third layer of cages. It is also communicated through the T-shaped three-way joint 12 .

The control valves on the water supply pipe, air supply pipe and sewage pipe are used to control the air flow and water circulation in the crab farming device. After the crabs in the part of the crab cage 1 in the crab raising device are taken out, the control valves on the internal water supply pipe 8 and the air supply pipe 9 can be closed to avoid waste of resources. After setting up the crab raising device of the present utility model, the control valves on the water supply pipes 8 and air supply pipes 9 in each crab cage 1 can be adjusted to balance the inflow and outflow of the cultured water in the cages, so as to avoid that the water inlet speed is greater than the drainage speed , the second is to adjust the amount of dissolved oxygen in the aquaculture water.

Each crab cage 1 is provided with a pipe section 14 made of PVC for controlling the depth of the cultured water stored in the crab cage 1. The lower end of the pipe section 14 is inserted into a T-shaped tee connected to the bottom drain hole of the crab cage 1. The vertical end 13 of the joint 12 is inside, and its outer diameter matches the inner diameter of the vertical end 13 to achieve sealing. The length of the pipe section 14 is not easy to exceed the maximum water storage height of the crab cage 1, that is, the bottom edge of the inlet and outlet 2 on the crab cage 1, so as to prevent the breeding water from overflowing the crab cage 1 from the bottom edge of the inlet and outlet 2. Replace the length of the pipe section 14 inserted in the vertical end 13 of the T-shaped tee joint 12, so that the culture water stored in the crab cage 1 reaches a suitable height.

The bottom surface of the crab cage 1 is covered with fine sand 15 with a thickness of one deck 5cm, in order to increase the sand-submerging activity of the crab, and help the self-cleaning of the crab body simultaneously.

The crab cage of the present utility model also has other arrangement methods, as shown in Fig. 5, it is made up of one layer of row cages, and this layer of row cages is made up of four crab cages 1 connected in series through the sides. The crab raising device can also be composed of a single crab cage placed independently. The crab raising devices can be placed back to back, or in rows, or in other suitable ways to adapt to the breeding site.

The crab raising device of the utility model can be flexibly combined and placed regardless of the size of the site and the shape of the site. Portunus trituberculatus can not only grow normally in the crab raising device, but also can effectively prevent the same kind from "cannibalizing each other". Through the full manual control of the Portunus trituberculatus breeding environment, the risk of breeding can be effectively reduced, the survival rate and feed utilization rate can be improved, and it is also convenient to take various measures to achieve the purpose of "disease prevention and control". The utility model realizes the high-density three-dimensional breeding mode of simultaneous breeding on multiple planes through water storage, makes full use of the water body space, saves energy and protects the environment, and is especially suitable for crab species with high value such as blue crabs and portunus trituberculatus farming.

The embodiment of the utility model is not limited thereto. According to the above content, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical idea of the utility model, other various forms of equivalents of the utility model are made. Amendment, replacement or change all should fall within the scope of protection of the present utility model.

Claims (10)

1. crab pot, it is characterized in that: described crab pot is a box body, and its front is provided be used to the import and export that feed intake and supply the crab class to come in and go out, and its side is provided with for access feed pipe, air supply pipe and blow-off pipe three groups to perforation, the bottom surface is provided with mudhole, is flexibly connected a cover plate in the described import and export.

2. crab pot according to claim 1 is characterized in that, the outstanding sloping platform that forms in middle part, described crab pot front, and described import and export are located on the sloping platform.

3. crab pot according to claim 1 is characterized in that, described cover plate is provided with perforate.

4. crab pot according to claim 1 is characterized in that, is respectively equipped with on the upper surface of described crab pot and the lower surface to be convenient to the location structure that itself and other crab pot superposes up and down.

5. crab pot according to claim 1 is characterized in that, described crab pot adopts polythene material to annotate pressure and forms.

6. a continental rise that is comprised of the crab pot described in the claim 1 to 5 is supported the crab device, it is characterized in that, described foster crab device is comprised of one deck row cage or two-layer above row's cage splices up and down forms, every layer of row's cage is comprised of a described crab pot or two the above crab pots form by the side serial connection, the described crab pot side correspondence position in every layer perforation is positioned on the straight line;

Three groups of crab pot in each layer of top layer crab pot below to corresponding feed pipe, air supply pipe and the blow-off pipe of laterally being installed with respectively in the perforation, wherein, feed pipe and air supply pipe are communicated with by in three-way connection and the cage respectively in each crab pot inside, and then the vertical end by T-shaped three-way connection is communicated with the mudhole of the crab pot bottom that is positioned at last layer blow-off pipe in each crab pot inside;

Three groups of the top layer crab pot wherein laterally are installed with respectively feed pipe and air supply pipe in two groups to perforation;

Be provided with in addition a blow-off pipe below one deck row cage of the end, this blow-off pipe is communicated with by T-shaped three-way connection equally with the mudhole that the bottom is arranged each crab pot on the cage;

Also be provided with control valve on described feed pipe, air supply pipe and the blow-off pipe, regulate the control valve of being located on feed pipe, air supply pipe and the blow-off pipe, control air-flow and water circuit in the described foster crab device.

7. continental rise according to claim 6 is supported the crab device, it is characterized in that, each crab pot inside of described foster crab device all is provided with a pipeline section of the degree of depth that is used for the aquaculture water of regulation and control crab pot internal reservoir, described pipeline section lower end is inserted in the vertical end of the T-shaped three-way connection that is communicated with crab pot bottom blow-down hole, place, and its external diameter and described vertical end internal diameter are suitable to realize sealing.

8. continental rise according to claim 7 is supported the crab device, and it is characterized in that: described crab pot bottom surface is covered with one deck fine sand.

9. continental rise according to claim 8 is supported the crab device, and it is characterized in that: the end that the three-way connection provided thereon of the control valve on described feed pipe, the air supply pipe is communicated with each crab pot, the control valve on the described blow-off pipe are located at total outlet side of blow-off pipe.

10. continental rise according to claim 9 is supported the crab device, and it is characterized in that: the upper surface of the crab pot on the described foster crab device top layer is provided with lamina tecti, and lamina tecti is provided with sieve aperture.

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