A blue crab fry shelter device

Abstract

The utility model discloses a kind of blue crab fry avoiding device, applied in blue crab breeding technical field, including barrier net and locking block, the both sides of barrier net are interwoven with support, the top of support is interwoven with eye, the surface of eye is wound with connecting rope, the inside chamber of locking block is welded with limit shell on one side, the inside chamber of limit shell is threadedly connected with locking bolt, the side of locking block is bonded with float ball, the inside chamber of limit shell is provided with internal thread, the surface of internal thread and the outer surface of locking bolt are threadedly connected, the utility model is through barrier net, it is convenient for crab fry to climb, avoid mutual cannibalism of blue crab larva, also convenient for collecting blue crab, by float ball, it is convenient for supporting barrier net, avoid barrier net to deposit in water bottom, also convenient for staff to extract barrier net, by locking bolt and limit shell, it is convenient for connecting rope to be locked, avoid barrier net to fall off by gravity.

Description

Technical Field

[0001] This utility model belongs to the field of mud crab farming technology, and specifically relates to a mud crab seedling hiding device. Background Technology

[0002] During the breeding process of mud crabs, megalopa larvae and juvenile crabs tend to cling to objects in the water and are highly aggressive. Mutual killing is one of the key factors affecting the survival rate of breeding seedlings. Existing technologies have taken corresponding measures to address mutual killing among mud crabs. For example, the patent document with authorization announcement number CN202714076U discloses a netting device for breeding mud crabs, which reduces mutual killing among mud crab juveniles to a certain extent. However, it still has drawbacks: the netting occupies a large area, is inconvenient to set up and retrieve in the breeding pond, and has a mediocre isolation effect, resulting in unsatisfactory breeding results. Utility Model Content

[0003] The purpose of this utility model is to provide a hiding device for mud crab seedlings. Its advantages are to increase the climbing space for mud crab seedlings, reduce the mortality rate in mud crab seedling production, and solve the problems of inconvenience in arranging and collecting hiding devices in seedling ponds.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a device for hiding crab seedlings, comprising a net and a locking block, wherein the net is interwoven with supports on both sides, and a collar is interwoven at the top of the supports, and a connecting rope is wound around the surface of the collar; a limiting shell is welded to one side of the inner cavity of the locking block, and a locking bolt is threaded into the inner cavity of the limiting shell; and a float is adhered to the side of the locking block.

[0005] The above technical solution is as follows: the net facilitates the climbing of crab larvae, preventing cannibalism among mud crab juveniles, and also facilitates the collection of mud crabs. The floats provide support for the net, preventing it from settling to the bottom of the water, and also make it easy for staff to retrieve the net. The locking bolts and limiting shells make it easy to lock the connecting ropes, preventing the net from falling off due to gravity.

[0006] The present invention is further configured such that the inner cavity of the limiting shell is provided with an internal thread, and the surface of the internal thread is threadedly connected to the outer surface of the locking bolt.

[0007] The above technical solution utilizes internal threads to facilitate the connection of locking bolts.

[0008] The present invention is further configured such that through holes are provided on both sides of the limiting shell, and one side of the connecting rope is inserted through the inner wall of the limiting shell.

[0009] The above technical solution allows for easy insertion of connecting ropes through through holes, and facilitates locking of the barrier net.

[0010] The present invention is further configured such that the material of the barrier is polyethylene, and the specification is a 20-mesh polyethylene mesh with a length of 0.5m and a width of 0.5m.

[0011] By adopting the above technical solution, the service life of the barrier net is improved by adjusting the material of the barrier net.

[0012] The present invention is further configured such that the distance between the floats and the distance between the net is 20cm, and the support is made of stainless steel.

[0013] The above technical solution improves the efficiency of protecting mud crabs by setting the distance between the buoy and the barrier net.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. The barrier net facilitates the climbing of crab larvae, preventing cannibalism among the juvenile mud crabs and making it easier to collect the mud crabs. The floats provide support for the barrier net, preventing it from settling to the bottom of the water and making it easier for staff to retrieve it. The locking bolts and limiting shells secure the connecting ropes, preventing the barrier net from falling off due to gravity.

[0016] 2. The internal thread facilitates the connection of locking bolts, and the through hole facilitates the insertion of connecting ropes, making it easy to lock the barrier net. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of the locking block of this utility model;

[0019] Figure 3 This is a cross-sectional view of the overall structure of the limiting shell of this utility model.

[0020] Reference numerals in the attached diagram: 1. Netting; 2. Bracket; 3. Ring; 4. Connecting rope; 5. Float; 6. Locking block; 7. Locking bolt; 8. Limiting shell; 9. Internal thread; 10. Through hole. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Example 1:

[0023] refer to Figure 1-3A device for hiding mud crab seedlings includes a net 1 and a locking block 6. The net 1 has supports 2 interwoven on both sides, and a collar 3 interwoven on the top of the supports 2. A connecting rope 4 is wrapped around the surface of the collar 3. A limiting shell 8 is welded to one side of the inner cavity of the locking block 6. A locking bolt 7 is threaded into the inner cavity of the limiting shell 8. A float 5 is glued to the side of the locking block 6.

[0024] Furthermore, the material of the barrier net 1 is polyethylene, and the specifications are 20-mesh polyethylene mesh with a length of 0.5m and a width of 0.5m. By setting the material of the barrier net 1, the service life of the barrier net 1 is improved.

[0025] Furthermore, the distance between the floats 5 and the net 1 is 20cm, and the support 2 is made of stainless steel. By setting the distance between the floats 5 and the net 1, the efficiency of protecting the blue crabs is improved.

[0026] Example 2:

[0027] refer to Figure 1-3 A device for hiding crab seedlings includes a limiting shell 8 with an internal thread 9 in its inner cavity. The surface of the internal thread 9 is threadedly connected to the outer surface of the locking bolt 7, and the locking bolt 7 is easily connected through the internal thread 9.

[0028] Furthermore, through holes 10 are provided on both sides of the limiting shell 8. One side of the connecting rope 4 is inserted through the inner wall of the limiting shell 8. The connecting rope 4 is easily inserted through the through hole 10, making it easy to lock the barrier net 1.

[0029] Brief description of the usage process: First, the user wraps the connecting rope 4 around the surface of the collar 3. Then, one end of the connecting rope 4 is inserted into the inner cavity of the limiting shell 8 through the through hole 10, and passes through the outside of the limiting shell 8. Then, the user turns the locking bolt 7 with a wrench. As the locking bolt 7 rotates, it is inserted into the inner cavity of the limiting shell 8. Since the threads on the surface of the locking bolt 7 and the internal threads 9 form a threaded hole, when the locking bolt 7 rotates, it moves itself deeper into the inner cavity of the limiting shell 8, which facilitates the locking and limiting of the connecting rope 4. Then, the connection rope 4 is locked and limited along the short side of the 20m2 water level maintenance 1m cultivation tank. When the megalopa larvae appear (when the mud crab's zoea larvae have just metamorphosed into megalopa larvae), connect the net 1 to the net 3 via the loop 3, and fix them in a string at 80cm intervals. The net 1 closest to the pond wall should be 40-50cm away from the pond wall. Fix both ends of the nylon line to the pond. When harvesting mud crab juveniles, first stop the oxygen supply system of the pond. Simply pull the connecting rope 4. When the net 1 is close to the edge of the pond, turn the locking bolt 7 in reverse to disengage the connecting rope 4 from the inner cavity of the locking block 6. Then remove the net 1 and place it in the hatching bucket to shake off the juveniles.

[0030] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0031] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A hiding device for mud crab larvae, comprising a barrier net (1) and a locking block (6), characterized in that: The barrier net (1) has supports (2) interwoven on both sides, and a collar (3) interwoven on the top of the supports (2). A connecting rope (4) is wrapped around the surface of the collar (3). A limiting shell (8) is welded to one side of the inner cavity of the locking block (6). A locking bolt (7) is threaded into the inner cavity of the limiting shell (8). A float (5) is glued to the side of the locking block (6).

2. The hiding place device for mud crab larvae according to claim 1, characterized in that: The inner cavity of the limiting shell (8) is provided with an internal thread (9), and the surface of the internal thread (9) is threadedly connected to the outer surface of the locking bolt (7).

3. The hiding place device for mud crab larvae according to claim 1, characterized in that: Both sides of the limiting shell (8) are provided with through holes (10), and one side of the connecting rope (4) is inserted through the inner wall of the limiting shell (8).

4. The hiding place device for mud crab larvae according to claim 1, characterized in that: The barrier net (1) is made of polyethylene and has a specification of 20 mesh polyethylene mesh with a length of 0.5m and a width of 0.5m.

5. The hiding place device for mud crab larvae according to claim 1, characterized in that: The distance between the buoys (5) and the barrier net (1) is 20cm, and the support (2) is made of stainless steel.

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