A crayfish catching device in a shrimp and crab mixed culture mode

Abstract

The utility model provides a crayfish catching device for a mixed shrimp and crab breeding mode, comprising: a support ring for a mesh frame, a ring-shaped opening is arranged on the top of the mesh frame to fix the outlet and open it for easy pouring out of the internal objects, and a fixing ring is fixed on the bottom of the mesh frame to maintain the space inside the mesh frame, ensuring that the crayfish have enough space to enter and stay. The mesh frame is fixed by inserting a fixing rod in the fixing ring, and a shrimp separation mechanism is installed on the lower side of the mesh frame. River crabs will climb out by themselves at an upward angle, while crayfish can only climb on the anti-escape block, but cannot climb out due to the smooth surface, thus achieving selective capture of crayfish. A positioning mechanism that can quickly find the position of the device is bolted on the top of the fixing rod to fix it, so as to ensure the stability of the device, and the position of the fishing device can be quickly found to save the time of searching for the device, thereby improving the fishing efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of aquatic fishing, and in particular relates to a crayfish fishing device in a shrimp and crab mixed breeding mode. Background Art

[0002] Crayfish is a common aquatic species in my country. Because of its delicious taste and high nutritional value, in recent years, more and more people like to eat crayfish, and the market demand for crayfish is also increasing year by year, resulting in a good situation of both domestic and foreign trade. Due to the prominent contradiction between supply and demand of crayfish, more and more farmers have begun to try various crayfish farming practices, such as pond main breeding mode, pond fish and shrimp mixed breeding mode, pond shrimp and crab mixed breeding mode and aquatic economic plant field (pond) breeding mode. Among them, the pond shrimp and crab mixed breeding mode is increasingly used by ordinary farmers due to its low risk and high efficiency. In the pond shrimp and crab mixed breeding mode, in the actual trapping activities, it is inevitable that the river crabs in the pond will be caught in the ground cage, which will not only cause crayfish and river crabs to kill each other and cause losses, but also increase the difficulty of sorting, which is labor-intensive and time-consuming. Farmers are in urgent need of a tool that can be used specifically to trap crayfish. Therefore, developing a simple, practical, and selective tool for trapping crayfish is beneficial to improving the efficiency of crayfish fishing in shrimp and crab mixed culture ponds, reducing the labor intensity of manual sorting, and improving breeding efficiency. At the same time, the existing ground cages are relatively long. When a large number of crayfish are caught in the ground cages, a person needs to use a lot of strength to drag the ground cages to the shore. In addition, the ground cages have a large friction with the ground and are easily damaged, which increases labor intensity and shortens the service life of the ground cages. At the same time, it will cause turbidity in the water and the upturn of bottom dirt.

[0003] The existing authorization number is CN206909484U, which discloses a crayfish fishing device for a shrimp and crab mixed breeding mode, including a fishing rod, a columnar cage, and a fishing net connected to the rear end of the columnar cage, wherein the columnar cage includes a mesh frame, a first annular support ring arranged at the front end of the columnar cage, and a second annular support ring arranged at the rear end of the columnar cage, wherein the first annular support ring is foldably connected to the fishing rod; the second annular support ring is evenly distributed with a plurality of connecting rings, and the fishing net is an ellipsoidal mesh, including an inlet end connected to the second annular support ring, wherein the inlet end is evenly distributed with a plurality of sleeves detachably connected to the connecting ring, and a card is provided at the opening of the sleeve. The crayfish fishing device provided by the utility model saves labor costs in the fishing process, and the use process is convenient and simple.

[0004] However, in actual trapping activities, the above device will inevitably capture river crabs in the pond into the ground cage, which will not only cause crayfish and river crabs to kill each other and cause losses, but also increase the difficulty of sorting and labor. At the same time, when the device is harvested, it is necessary to drag the device to the ground for the next step, which requires a lot of force to drag it to the shore, resulting in great friction with the ground, which is easy to cause damage to the device, increase labor intensity, and shorten the service life of the ground cage. Therefore, it is necessary to propose a crayfish fishing device in a shrimp and crab mixed breeding mode to solve the above problems. Utility Model Content

[0005] The technical content of the utility model is to provide a crayfish catching device in a shrimp and crab mixed breeding mode.

[0006] In order to solve the above problems, the utility model provides a crayfish catching device for a shrimp and crab mixed breeding mode, comprising: a supporting ring for a mesh frame, a ring-shaped opening is arranged on the top of the mesh frame to fix the outlet and open it to facilitate pouring out the internal objects, a fixing ring is fixed on the bottom of the mesh frame, and a fixing rod is inserted inside the fixing ring to fix the device and prevent the device from moving, the mesh frame is fixed in the fixing ring by the fixing rod, a shrimp separating mechanism is installed on the lower side of the mesh frame, and a positioning mechanism is bolted on the top of the fixing rod to quickly find the position of the device.

[0007] As a further solution of the utility model, the mesh frame is cross-woven by multiple steel wires, and support rings are provided at the nodes of the cross-woven steel wires to prevent the frame from being deformed or sunken due to the weight of the crayfish or external forces during the fishing process. This ensures that the shape of the fishing device remains stable, thereby improving the fishing efficiency.

[0008] As a further solution of the utility model, the mesh skeleton is a funnel-shaped structure, which can quickly pour out the crayfish, reduce operation time and increase efficiency.

[0009] As a further solution of the present invention, the bottom of the mesh frame is a rounded triangle structure, and a fixing ring is fixed at each of the three corners to fix the device and reduce the probability of the device being lost due to environmental factors.

[0010] As a further solution of the utility model, the positioning mechanism includes a nylon rope, a floating ball and a connecting ring. The floating ball is fixed on the nylon rope, and the other side of the nylon rope is bolted to the connecting ring. It can be adjusted according to different water conditions to enhance the flexibility of the device.

[0011] As a further solution of the utility model, the connecting ring is fixed on the fixing rod, and the fixing rod fixes the device by being inserted into the fixing ring, and the floating ball can float on the water surface and has a distinct color on the surface. With the floating ball that displays the position, even if the device moves, it can be easily tracked, reducing the risk of loss.

[0012] As a further solution of the present invention, the shrimp separating mechanism includes a conical shrimp inlet, a mounting groove and an anti-escape block. The conical shrimp inlet is designed with two conical structures facing each other, and the parts installed on the outer side and the upper side of the inner side are composed of a mesh structure. The lower side of the internal anti-escape block is made of a smooth material. Since the friction coefficient of the smooth anti-escape block is very small, crayfish cannot crawl out, thereby realizing the selective capture of crayfish.

[0013] As a further solution of the present invention, eight installation grooves are provided on the outer side of the conical shrimp inlet, and ropes are used to fix the installation grooves to the mesh frame. The river crabs will crawl out along the mesh on the upper part of the conical shrimp inlet, so that the device has a sorting effect.

[0014] In summary, the utility model includes at least one of the following beneficial technical effects:

[0015] First, the utility model records a crayfish fishing device in a shrimp and crab mixed breeding mode, which records that a shrimp separation mechanism is set on the mesh frame, and is designed according to the different climbing habits of crayfish and river crabs. It is observed that crayfish do not have the ability to climb at an elevation angle, while river crabs, on the contrary, have a strong ability to climb at an elevation angle and particularly like to climb at an elevation angle. Therefore, a smooth anti-escape block is set at the exit, and the conical shrimp inlet is not closed during fishing. When crayfish and river crabs enter the ground cage, the river crabs will climb out by themselves along the mesh on the upper part of the conical shrimp inlet, and the crayfish can only climb on the smooth anti-escape block placed at an angle. Because the friction coefficient of the smooth anti-escape block is very small, the crayfish cannot climb out, which realizes the selective trapping of crayfish.

[0016] Second, the utility model records a crayfish catching device for a mixed shrimp and crab farming model, which records that the device is arranged as a funnel-shaped mesh frame. This arrangement allows the device to be dispersed and placed in various places, making it more portable and convenient for fishermen to carry and operate, especially in an environment where space on board is limited. This design allows fishermen to collect shrimps on board and perform fishing operations more flexibly. The device is simple in design and easy to operate. Fishermen can quickly put the fishing device into the water and quickly take it out after the fishing is completed. The funnel-shaped design allows the crayfish to be quickly poured out, reducing operation time and increasing efficiency.

[0017] Third, the utility model records a crayfish fishing device for a mixed shrimp and crab breeding model, which records that a positioning mechanism is provided on a fixed rod, and the setting can be adjusted according to different water conditions. For example, a larger floating ball is used in areas with faster water flow to ensure the stability of the device. At the same time, in locations with shallow water levels, it can be fixed only by inserting a fixed rod. This flexibility helps to adapt to various fishing environments and improve fishing results. In the water area, the fishing device may drift due to water flow or other factors. With a floating ball that displays the position, even if the device moves, it can be easily tracked to reduce the risk of loss. At night or in low light conditions, the marked floating ball can make the fishing device easier to see, which is convenient for night fishing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of a crayfish catching device in a shrimp and crab mixed culture mode of the utility model;

[0020] Figure 2 This is a schematic diagram of the mesh frame and positioning mechanism structure of a crayfish catching device in a shrimp and crab mixed breeding mode of the utility model;

[0021] Figure 3 It is a schematic cross-sectional diagram of a mesh skeleton structure of a crayfish catching device in a shrimp and crab mixed culture mode of the utility model;

[0022] Figure 4 This is a schematic diagram of the mesh frame and fixed ring structure of a crayfish catching device in a shrimp and crab mixed breeding mode of the utility model;

[0023] Figure 5 This is a schematic diagram of the structural decomposition of the shrimp separating mechanism of a crayfish catching device in a shrimp and crab mixed breeding mode of the utility model.

[0024] Figure numerals: 1. mesh frame; 2. support ring; 3. annular mouth; 4. fixing rod; 5. shrimp separating mechanism; 51. conical shrimp inlet; 52. mounting groove; 53. anti-escape block; 6. fixing ring; 7. nylon rope; 8. floating ball; 9. connecting ring. DETAILED DESCRIPTION

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A crayfish catching device for a shrimp and crab mixed breeding mode comprises: a support ring 2 for a mesh frame 1, a ring-shaped opening 3 for fixing and opening the outlet to facilitate pouring out the internal objects is arranged on the top of the mesh frame 1, a fixing ring 6 is fixed on the bottom of the mesh frame 1, and a fixing rod 4 for fixing the device to prevent the device from moving is inserted inside the fixing ring 6, the mesh frame 1 is fixed in the fixing ring 6 by the fixing rod 4, a shrimp separating mechanism 5 is installed on the lower side of the mesh frame 1, and a positioning mechanism for quickly finding the position of the device is bolted on the top of the fixing rod 4.

[0026] Preferably, the mesh skeleton 1 is cross-woven by multiple steel wires, and support rings 2 are provided at the nodes of the cross-woven steel wires. The mesh skeleton 1 is a funnel-shaped structure. By providing the annular support rings 2, the space inside the mesh skeleton 1 can be maintained to ensure that crayfish have enough space to enter and stay, which helps to increase the catch.

[0027] Preferably, the bottom of the mesh skeleton 1 is a rounded triangular structure, and a fixing ring 6 is fixed at each of the three corners. The positioning mechanism includes a nylon rope 7, a floating ball 8 and a connecting ring 9. The floating ball 8 is fixed on the nylon rope 7, and the other side of the nylon rope 7 is bolted to the connecting ring 9. The connecting ring 9 is fixed to the fixing rod 4, and the fixing rod 4 fixes the device by inserting it on the fixing ring 6. It can be adjusted according to different water conditions. For example, in areas with faster water flow, the nylon rope 7 on the floating ball 8 can be bolted to the connecting ring 9 to ensure the stability of the device. At the same time, in locations with shallow water levels, it can be fixed only by inserting the fixing rod 4. The floating ball 8 can float on the water surface and has a distinct color on the surface. Through the conspicuous marking of the floating ball 8, the operator can quickly find the position of the fishing device, especially when the water surface is large or the line of sight is poor. This helps to save time in finding the device, thereby improving the fishing efficiency.

[0028] Preferably, the shrimp separating mechanism 5 includes a conical shrimp inlet 51, a mounting groove 52 and an anti-escape block 53. The conical shrimp inlet 51 is designed to be two conical structures facing each other, and the parts installed on the outer side and the upper side of the inner side are composed of a mesh structure. The lower side of the internal anti-escape block 53 is composed of a smooth material. Eight mounting grooves 52 are provided on the outer side of the conical shrimp inlet 51, and a rope is used to fix it to the mesh skeleton 1 through the mounting grooves 52. Crayfish do not have the ability to climb at an elevation angle, while river crabs do the opposite. A smooth anti-escape block 53 is set at the exit, and the conical shrimp inlet 51 is not closed during fishing. When crayfish and river crabs enter the mesh skeleton 1, the river crabs will climb out along the mesh on the upper part of the conical shrimp inlet, while crayfish can only climb on the tilted anti-escape block 53. Since the friction coefficient of the anti-escape block 53 is very small, the crayfish cannot climb out, thereby achieving selective capture of crayfish.

[0029] The working principle of the crayfish catching device in a shrimp and crab mixed culture mode provided by the utility model is as follows:

[0030] The steps for using a crayfish fishing device usually include the following key steps:

[0031] When choosing a water area suitable for catching crayfish, you usually need to consider factors such as water quality, aquatic plant coverage, and water flow speed. Make sure the fishing device is intact and check whether the mesh frame and support ring are intact.

[0032] Put the mesh frame 1 into the water, insert the fixing rod 4 into the fixing ring 6, and fix the mesh frame 1 stably on the bottom of the water. It can be adjusted according to different water conditions. For example, in areas with faster water flow, the nylon rope 7 on the floating ball 8 can be tied to the connecting ring 9 to ensure the stability of the device.

[0033] The bait is placed in the mesh frame 1 to attract the crayfish to enter the mesh frame 1 , and a certain amount of time is waited for the crayfish to enter the mesh frame 1 .

[0034] After waiting for a sufficient time, you can take a boat to check whether there are enough crayfish in the mesh frame 1, confirm the position by observing the floating ball 8 or the fixing rod 4, pull out the fixing rod 4, lift the mesh frame 1 and pour it into the container for placing crayfish in the boat, put the mesh frame 1 back in, insert the fixing rod 4 to fix it, and check the placed mesh frames 1 in turn to collect the shrimp.

[0035] When the device is not in use, the mesh frame 1 is cleaned and stored in a dry environment for next use.

[0036] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A crayfish catching device for a mixed culture mode of shrimps and crabs, comprising: A support ring (2) for a mesh frame (1), characterized in that: the top of the mesh frame (1) is provided with an annular opening (3) for fixing the outlet to open and conveniently pouring out the internal objects; the bottom of the mesh frame (1) is fixed with a fixing ring (6), and a fixing rod (4) is inserted inside the fixing ring (6) to fix the device to prevent the device from moving; the mesh frame (1) is fixed by inserting the fixing rod (4) into the fixing ring (6); a shrimp separation mechanism (5) is installed on the lower side of the mesh frame (1); and a positioning mechanism for quickly finding the position of the device is bolted on the top of the fixing rod (4); The shrimp separation mechanism (5) comprises a conical shrimp inlet (51), wherein the conical shrimp inlet (51) is fixed on the supporting mesh frame (1); The positioning mechanism comprises a connecting ring (9), wherein the connecting ring (9) is fixed on the upper side of the fixing rod (4).

2. The crayfish catching device for mixed shrimp and crab culture according to claim 1, characterized in that: The mesh frame (1) is cross-woven from a plurality of steel wires, and support rings (2) are provided at the nodes where the steel wires are cross-woven.

3. The crayfish catching device for mixed shrimp and crab culture according to claim 2, characterized in that: The mesh skeleton (1) is a funnel-shaped structure.

4. The crayfish catching device for mixed shrimp and crab culture according to claim 3, characterized in that: The bottom of the mesh frame (1) is a rounded triangle structure, and a fixing ring (6) is fixed at each of the three corners.

5. The crayfish catching device for mixed shrimp and crab culture according to claim 4, characterized in that: The positioning mechanism comprises a nylon rope (7), a floating ball (8) and a connecting ring (9); the floating ball (8) is fixed on the nylon rope (7), and the other side of the nylon rope (7) is bolted to the connecting ring (9).

6. The crayfish catching device for mixed shrimp and crab culture according to claim 5, characterized in that: The connecting ring (9) is fixed on the fixing rod (4), and the fixing rod (4) fixes the device by being inserted on the fixing ring (6), and the floating ball (8) can float on the water surface and has a surface with a distinct color.

7. The crayfish catching device for mixed shrimp and crab culture according to claim 1, characterized in that: The shrimp separation mechanism (5) comprises a conical shrimp inlet (51), a mounting groove (52) and an anti-escape block (53); the conical shrimp inlet (51) is designed as two conical structures facing each other, and the parts mounted on the outer side and the upper side of the inner side are composed of a mesh structure, and the lower side of the anti-escape block (53) inside is composed of a smooth material.

8. The crayfish catching device for mixed shrimp and crab culture according to claim 7, characterized in that: The outer side of the conical shrimp inlet (51) is provided with eight mounting grooves (52), and ropes are used to pass through the mounting grooves (52) to fix the mesh frame (1).

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