Mesh cover device capable of relieving vortex strength and avoiding fish body entrainment

Abstract

The utility model discloses a mesh enclosure device capable of reducing vortex strength and avoiding fish body entrainment, which comprises a mesh enclosure body, and is characterized in that the mesh enclosure body is provided with an enclosure frame bottom larger than a water outlet at the bottom of a fishpond, a transverse fence is arranged on the periphery of the mesh enclosure body, a pressure relief plate is arranged at the top of the mesh enclosure body, and small holes are fully distributed on the pressure relief plate; a connecting device fixed to the bottom face of a fishpond is arranged at the bottom of the net cover body. The water outlet vortex intensity can be greatly reduced or the vortex can be eliminated, fish products are prevented from being adsorbed to the water outlet to be damaged, the fish products can easily get rid of in the water outlet area, the structure is simple, operation and positioning are easy, and smooth operation such as dirt removal can be guaranteed.

Description

Technical Field

[0001] The utility model relates to a sturgeon breeding technology, in particular to a net cover device which can reduce the intensity of a vortex and prevent fish from being drawn in. Background Art

[0002] Fish ponds typically have a drainage system at the bottom. In large-scale aquaculture ponds, the drain valves are highly efficient and drain quickly, creating a large vortex at the pond's drain outlet. This can draw delicate fish directly into the system, trapping them against the drain cover and preventing them from escaping. This not only affects proper drainage but can also injure the fish. Modern fish ponds often share a single drainage gate system across several ponds (in a row). Disparate water levels can cause water to flow backward when the gates close, potentially lifting the drain cover and causing subsequent drainage to increase. This can trap fish against the drain and lead to their death. Therefore, reversing the vortex created by the drain outlet is crucial to solving this problem.

[0003] The publicly available vortex elimination design has many applications in industry. For example, patent publication number CN111119131B designs a flat gate device that can eliminate vortices in front of a gate. The method is to vertically arrange two curved grilles that are at the same height as the gate and close to the gate surface on the water-facing surface of the gate, and provide the curve requirements of the curved grilles. Another example is patent publication number CN204252087U, which describes a flood discharge tunnel water vortex elimination device. The device includes an inlet breast wall and a vortex elimination device. The vortex elimination device is a grid structure that is perpendicular to and connected to the inlet breast wall. The vortex elimination device includes a number of cantilevers and beams. The cantilevers are perpendicular to and connected to the inlet breast wall, and each cantilever is at the same height and spaced apart. The crossbeams are parallel to the inlet breast wall, and each crossbeam is spaced apart and connected to the upper surface of the cantilever. A longitudinal beam perpendicular to the inlet breast wall is provided in the middle of adjacent cantilevers, and the longitudinal beam is connected to the crossbeam. All of the above structures are designed specifically for the project to be solved, or are only applicable to special flood discharge holes of large diversion holes, and cannot be used to eliminate or slow down the vortex at the drain outlet on the bottom of the fish pond. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems and provide a net cover device that reduces the intensity of the vortex to prevent fish from being drawn in. It has the characteristics of greatly reducing the intensity of the vortex, preventing fish from being adsorbed in the drain outlet, ensuring that fish can easily break free in the drain outlet area, and maintaining normal drainage and cleaning.

[0005] The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions: a net cover device for reducing the intensity of vortex to prevent fish from being drawn in, comprising a net cover body, characterized in that the net cover body has a frame bottom that is larger than the drain outlet at the bottom of the fish pond, a horizontal fence is provided around the net cover body, a pressure relief plate is provided on the top of the net cover body, and the pressure relief plate is covered with small holes; the bottom of the net cover body is provided with a connection device fixed to the bottom surface of the fish pond.

[0006] In the aforementioned net cover device for reducing the intensity of vortex to prevent fish from being entangled, preferably, the meshing part of the net cover body and the bottom of the fish pond, except for the supporting feet, maintains the spacing between two adjacent horizontal fences.

[0007] In the aforementioned net cover device for reducing vortex intensity to prevent fish from being entangled, preferably, the net cover body is a polygonal or cylindrical structure.

[0008] In the aforementioned net cover device for reducing vortex intensity to prevent fish from being entangled, preferably, the height of the net cover body is less than or equal to 1 / 3 to 1 / 6 of the maximum water storage depth of the fish pond.

[0009] In the aforementioned net cover device for reducing the intensity of vortex to prevent fish from being entangled, preferably, the connecting device includes a buckle arranged on the bottom surface of the fish pond, and the net cover body is provided with a pin that cooperates with the buckle, and the pin is connected to the net cover body as a whole.

[0010] In the aforementioned net cover device for reducing the intensity of vortex to prevent fish from being entangled, preferably, a ring handle is provided on the net cover body, and the connecting device also includes an auxiliary connecting device that cooperates with the ring handle.

[0011] In the aforementioned net cover device for reducing the intensity of the vortex to prevent fish from being entangled, preferably, the ring handle is hinged to the net cover body, and the auxiliary connecting device includes an open angle lock positioned on the bottom surface of the fish pond, and the open angle lock has a horizontal opening, and the opening size is larger than the handle diameter of the ring handle.

[0012] In the aforementioned net cover device for reducing the intensity of the vortex to prevent the fish from being entangled, preferably, the auxiliary connecting device and the bolts of the connecting device are distributed on two opposite sides of the net cover body, and the auxiliary connecting device, the ring handle and the bolts and pins of the connecting device cooperate with each other to form a common lock.

[0013] In the aforementioned net cover device for reducing vortex intensity to prevent fish from being entangled, preferably, the distance between two adjacent single horizontal fences is smaller than the minimum width or height of the fish trunk in the fish pond.

[0014] This technical solution is based on the design of a mesh cover body in the fish pond, with the mesh cover body surrounded by horizontal fences. The spacing between adjacent horizontal fences is adapted to the fish in the fish pond. Generally, large-scale sturgeon farming is divided into ponds according to fish age and body size. The spacing between fences is intended to ensure that fish are not trapped in them. The setting of horizontal fences can also avoid the risk of fish heads entering the fences and continuing to drill in.

[0015] A pressure-relief plate is designed on the top of the mesh cover, located directly above the drain outlet. The pressure-relief plate is covered with small holes, which greatly reduces the water pressure directly above the drain outlet. At the same time, the horizontal fence around the mesh cover body also plays a role in slowing down the flow, but does not block the water from converging into the drain outlet. As a result, the drain outlet forms an overall buffer zone based on the mesh cover body, isolating the distance between the drain outlet and the fish body, easing the flow rate at the drain outlet, reducing the degree of vortex or making it disappear, and reducing the attraction to fish.

[0016] The bottom drain of a fish pond is typically located near or at the edge of the pond. Due to varying water velocity in different directions during drainage, the mesh screen must be secured. This device features a one-step, easy-to-use bottom-mounted connection that prevents translation and lifting. The connection is positioned near the pond wall, with the load-bearing point facing away from the direction of high water velocity. An auxiliary connection is located on the opposite side. The mesh screen's freedom is defined by the coordination between the auxiliary connection and the lifting ring handle, and the coordination between the connection and the latch.

[0017] Furthermore, except for the supporting feet, there is a gap between the mesh cover body and the bottom of the fish pond, ensuring that fish feces, food residues, etc. can be smoothly flushed and discharged during the cleaning process.

[0018] Furthermore, the height of the mesh cover body is 1 / 3 to 1 / 6 of the maximum water storage depth of the fish pond, so that when the fish pond is at the maximum water storage depth, that is, at the maximum drainage volume and maximum flow rate, the mesh cover body can slow down the flow and eliminate vortices; and the minimum height design of the mesh cover body means that even if the pressure relief plate is exposed above the water surface, the water flow at this time will not cause a huge vortex, not to mention that the water replenishment operation has already begun when the fish are in the pond.

[0019] Therefore, compared with the existing technology, the beneficial effects of the present invention are: it can greatly reduce the vortex intensity at the drain outlet or eliminate the vortex, avoid fish from being adsorbed in the drain outlet and causing damage, and allow fish to easily break free in the drain outlet area. It has a simple structure, is easy to operate and position, and can ensure the smooth progress of operations such as cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present utility model.

[0021] Figure 2This is a schematic diagram of the structure of the utility model in a usage state.

[0022] Figure 3 yes Figure 1 Top view of .

[0023] Figure 4 It is a schematic diagram of a partially enlarged structure of a latch part of the utility model.

[0024] Figure 5 yes Figure 4 Right view of .

[0025] Figure 6 It is a partial enlarged structural diagram of an auxiliary connecting device of the utility model.

[0026] Figure 7 yes Figure 6 Top view (partial).

[0027] In the figure: 1-mesh cover body, 101-pressure relief plate, 102-horizontal fence, 103-latch, 104-cover cap, 2-fish pond, 201-drain outlet, 3-bolt, 4-eye handle, 5-opening corner lock. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further specifically described below with reference to the embodiments and the accompanying drawings.

[0029] This embodiment is a net cover device that reduces the intensity of the vortex to prevent fish from being entangled. Figure 1 The main structure is a screen body 1, which is in the shape of a rectangular parallelepiped. Its bottom is a frame bottom with a larger bottom drain outlet 201 than the bottom of the fish pond 2. The height of the screen body 1 is 1 / 4 of the maximum water storage depth of the fish pond 2. Horizontal fences 102 are provided on three sides of the screen body 1. All individual horizontal fences 102 are arranged in parallel and at equal intervals. The distance between two adjacent individual horizontal fences is less than the minimum width or height of the fish trunk in the fish pond. Taking the average weight of adult fish in a pond of about 20 kg as an example, the distance between individual horizontal fences is 20-30 mm. A pressure relief plate 101 is provided on the top of the screen body 1. The pressure relief plate 101 is covered with small holes with an aperture of 20 mm. Except for the pressure relief plate 101, the other parts of the screen body 1 are made of corrosion-resistant materials such as stainless steel or galvanized pipe, or are treated with corrosion protection. The pressure relief plate 101 can be made of materials such as PVC, PP board or acrylic, and forms an integrated structure with the mesh cover body 1 during assembly.

[0030] Except for the supporting feet, the other parts of the mesh cover body 1 and the bottom surface of the fish pond 2 maintain the spacing between two adjacent horizontal fences 102 to ensure that the dirt close to the surface can pass smoothly during drainage and avoid dirt accumulation.

[0031] The bottom of the net cover body 1 is provided with a connection device fixed to the bottom surface of the fish pond 2.

[0032] The connecting device includes two buckles 3 arranged on the bottom surface of the fish pond 2, and a pin 103 is provided on the bottom edge of the net cover body 1 to cooperate with the two buckles 3. Figure 3 As shown, an auxiliary connecting device is provided on the opposite side of the bolt buckle 3 of the connecting device, and a lifting ring handle 4 is provided at the auxiliary connecting device.

[0033] Specifically, the latch 103 in the connecting device is connected to the mesh cover body 1 as a whole. Figure 4 、 Figure 5 As shown, the bolt buckle 3 is made of round steel or flat steel and is bent to form a rectangular socket with the ground. The bolt buckle 3 can be installed in the ground of the fish pond 2 by pre-embedding, or it can be positioned by other fixing methods such as expansion bolts.

[0034] The lifting ring handle 4 is hinged to the side bar (or horizontal fence if the strength is sufficient) at the lower end of the net cover body 1. The auxiliary connecting device is provided with an opening angle lock 5 positioned on the bottom surface of the fish pond 2. Figure 6 、 Figure 7 As shown, the open angle lock is obtained by bending angle steel or sheet metal, and has a horizontal opening. The opening size is slightly larger than the handle diameter of the ring handle 4, and the width of the open angle lock 5 is smaller than the length of the handle of the ring handle 4.

[0035] The distance between the opening angle lock 5 and the latch 3 matches the width of the mesh cover body 1 at this position. The coordination between the auxiliary connecting device and the lifting ring handle 4, and the coordination between the latches 3 and the latch 103 at the two locations of the connecting device together form a degree of freedom locking for the mesh cover body 1.

[0036] In use, the drain outlet 201 at the bottom of the fish pond 2 is generally arranged on the bottom surface of the edge of the fish pond 2, then the two latches 3 are installed at the near point position of the pond wall, and the open angle lock 5 is installed at the far point position of the pond wall.

[0037] First, lay the mesh cover body 1 flat, align the pin 103 with the buckle 3, and align the lifting ring handle 4 with the open angle lock 5. At this time, the handle of the lifting ring handle 4 is placed on the ground, and then push the entire mesh cover body 1 toward the near point of the pool wall, so that the pin 103 is inserted into the buckle 3, and at the same time, the handle of the lifting ring handle 4 is moved into the open angle lock 5, and the installation is completed.

[0038] When the mesh cover body 1 needs to be disassembled, just push the mesh cover body 1 toward the far point of the pool wall to disengage the pin 103 from the latch 3, and move the handle of the ring handle 4 out of the open angle lock 5. The entire mesh cover body 1 can be moved using the ring handle 4 and other available force points.

[0039] When the fish pond needs to be drained and cleaned, a large amount of water will be concentrated in the direction of the drain outlet 201. Since the mesh cover body 1 constitutes a buffer, the rotational force of the water flow is greatly reduced. At the same time, it also isolates the distance between the drain outlet 201 and the fish swimming near the drain outlet 201, thereby reducing the attraction of the vortex, allowing the fish to easily break free from the mesh cover body 1 and reduce damage.

[0040] When multiple fish ponds share a drainage gate system, due to the inconsistent drainage speeds and water levels of each fish pond, the water flowing back when the gate is closed may impact the drain outlet 201 cover and the mesh cover body 1, and the mesh cover body 1 will not be displaced by the upward impact of the connecting device.

[0041] The above embodiments are for explanation of the present invention, not for limitation of the present invention. For example, if the mesh cover body 1 is a regular polygonal prism or cylindrical structure, etc., without departing from the principle of the present technical solution, any simple transformation of the structure of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A net cover device for reducing the intensity of vortex to prevent fish from being drawn in, comprising a net cover body (1), characterized in that The net cover body has a frame bottom that is larger than the drain outlet (201) at the bottom of the fish pond (2); a horizontal fence (102) is provided around the net cover body; a pressure relief plate (101) is provided on the top of the net cover body, and the pressure relief plate is covered with small holes; and a connection device is provided at the bottom of the net cover body to be fixed to the bottom surface of the fish pond.

2. A net cover device for reducing vortex intensity to prevent fish from being drawn in according to claim 1, characterized in that: The meshing portion between the net cover body (1) and the bottom surface of the fish pond (2), except for the supporting legs, retains the spacing between two adjacent horizontal fences (102).

3. The net cover device for reducing vortex intensity to prevent fish from being entangled according to claim 1, characterized in that: The mesh cover body (1) is in a polygonal or cylindrical structure.

4. The net cover device for reducing vortex intensity to prevent fish from being drawn in according to claim 1, characterized in that: The height of the net cover body (1) is less than or equal to 1 / 3 to 1 / 6 of the maximum water storage depth of the fish pond (2).

5. The net cover device for reducing vortex intensity to prevent fish from being entangled according to claim 1, characterized in that: The connecting device comprises a latch (3) arranged on the bottom surface of the fish pond (2); a latch (103) cooperating with the latch is provided on the net cover body (1); and the latch is connected to the net cover body (1) as a whole.

6. A net cover device for reducing vortex intensity to prevent fish from being drawn in according to claim 5, characterized in that: The mesh cover body (1) is provided with a lifting ring handle (4), and the connecting device further comprises an auxiliary connecting device that cooperates with the lifting ring handle.

7. A net cover device for reducing vortex intensity to prevent fish from being drawn in according to claim 6, characterized in that: The lifting ring handle (4) is hinged to the net cover body (1), and the auxiliary connection device includes an open angle lock (5) positioned on the bottom surface of the fish pond (2), and the open angle lock has a horizontal opening, and the opening size is larger than the handle diameter of the lifting ring handle.

8. The net cover device for reducing vortex intensity to prevent fish from being drawn in according to claim 6, characterized in that: The auxiliary connecting device and the bolt buckle (3) of the connecting device are distributed on two opposite sides of the mesh cover body (1); the auxiliary connecting device, the lifting ring handle (4) and the bolt buckle and the latch (103) of the connecting device cooperate with each other to form a common lock.

9. The net cover device for reducing vortex intensity to prevent fish from being drawn in according to claim 1, characterized in that: The distance between two adjacent single horizontal fences is less than the minimum width or height of the fish trunk in the fish pond.

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