Fry screening net

Abstract

The utility model relates to the technical field of fry screening, in particular to a fry screening net which comprises a screening net body and a floating body arranged on the screening net body, and the floating body can float on the water surface. The floating body is provided with a driving device capable of driving fries in a non-contact manner; the bottom face of the screen cloth protrudes upwards at intervals, and the multiple protrusions are sequentially connected to form a fluctuating structure. The fish fry screening device can screen fish fries in a non-contact mode, is convenient to use and wide in application range, and does not damage the fish fries in the screening process.

Description

Technical Field

[0001] The utility model relates to the technical field of fry screening, in particular to a fry screening net. Background Art

[0002] At present, the commonly used fry screening tool in production is still the traditional fish sieve, which is mostly a hemispherical bamboo basket-shaped sieve woven with bamboo strips. During the screening process, workers need to hold the fish sieve all the time to prevent it from sinking to the bottom of the water, and constantly shake it in the water to drive fry of a certain specification into the water outside the sieve mesh, so as to achieve the purpose of screening. This kind of fish sieve is easy to cause fry extrusion, resulting in injuries to the fry body surface, increasing the stress response of the fry, and having a large operation intensity, consuming time and effort, and low screening efficiency.

[0003] Therefore, the patent with the application number CN202320439122.5 discloses a floating fry screening net, which can float on the water surface by itself during fry screening, without the need for manual holding, effectively avoiding the situation that the screening net sinks due to too many screened fry, being more convenient and labor-saving, and reducing fry damage. When using this patent, the fry to be screened are gently poured into the sieve net along the water surface. Along with the water flow, the fry will swim by themselves. The fry smaller than the mesh aperture will swim out and enter the preset water body, and the fry larger than the mesh aperture will stay in the sieve net, so as to achieve the purpose of size screening.

[0004] The above patent uses water flow instead of manual shaking to drive the fry to swim by themselves in the water flow for screening. Although this can save manpower and reduce fry damage, the water flow speed is not easy to control and the water flow is in direct contact with the fry. If the water flow speed is too low, it is easy to reduce the screening efficiency, and if the water flow speed is too high, it is easy to damage the small fry. Therefore, it is not convenient to use, and this patent is limited to use in an environment with water flow, having certain limitations itself. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a fry screening net, which can drive the fry for screening in a non-contact manner, is convenient to use, has a wide application range, and does not damage the fry during the screening process.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A fry screening net includes a sieve net and a floating body arranged on the sieve net, and the floating body can float on the water surface; a driving device for non-contact driving of fry is arranged on the floating body; the bottom surface of the sieve net is spaced upwardly convex, and a plurality of the convexes are sequentially connected to form a undulating structure.

[0008] As an optional solution, the driving device is a vibrator or an ultrasonic fish driving device.

[0009] As an alternative solution, two driving devices are provided, and the two driving devices are respectively arranged on two opposite sides of the floating body.

[0010] As an alternative solution, handles adjacent to the two driving devices are respectively arranged on the other two opposite sides of the floating body, and the handles penetrate through the floating body and are fixedly connected to the screen net.

[0011] As an alternative solution, the top of the undulating structure is provided with a rounded corner.

[0012] As an alternative solution, the floating body is a frame-shaped foam floating board, and the floating body is fixedly connected to the screen net along the top edge of the screen net.

[0013] Due to the adoption of the above technical solution, the present utility model will have the following beneficial effects:

[0014] A fry screening net provided by the present utility model provides greater buoyancy for the screen net by arranging a floating body that can float on the water surface, so that it is not necessary to hold the screen net manually during the screening process, effectively avoiding the situation that the screen net sinks due to too many screened fry, which is more convenient and labor-saving, and improves the screening efficiency. By arranging a driving device to drive the fry in a non-contact manner, the fry can swim through the screen net by themselves for screening. Compared with the method of driving the fry by water flow, the non-contact driving method is adopted, and it is not necessary to control the water flow speed for driving the fry so as not to damage the fry or affect the screening efficiency, nor is it necessary to be used in an environment with water flow. Therefore, it is more convenient to use and has a wider range of applications. By setting the bottom surface of the screen net to be an undulating structure, since the fry swim horizontally, this undulating structure can shorten the horizontal swimming space of the fry, increase the contact range between the fry and the screen net, thereby increasing the probability of the fry swimming out from the bottom surface of the screen net and improving the fry screening efficiency. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is the overall schematic diagram of the fry screening net described in the embodiment of the present utility model;

[0017] Figure 2 It is Figure 1 The front view of the fry screening net described in the embodiment;

[0018] Figure 3 It isFigure 1 Top view of the fry screening net described in the embodiment.

[0019] Reference numerals: 1, sieve mesh; 2, floating body; 3, driving device; 4, undulating structure; 5, handle. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] Please refer to Figures 1-3 , in an embodiment of a fry screening net of the present invention, the fry screening net includes a sieve mesh 1 and a floating body 2 arranged on the sieve mesh 1. The sieve mesh 1 is in the shape of a cuboid with an open top surface. The floating body 2 can float on the water surface to provide greater buoyancy for the sieve mesh 1, so that the sieve mesh 1 does not need to be held manually, effectively avoiding the situation that the sieve mesh 1 sinks due to too many fry to be screened, resulting in the sieve mesh 1 being too heavy.

[0024] Among them, a driving device 3 for non-contact driving of fry is provided on the floating body 2. By driving the fry in a non-contact manner through the driving device 3, the fry can swim through the sieve 1 by themselves for screening. Compared with the method of driving fry by water flow, this embodiment adopts a non-contact driving method, which does not require controlling the water flow speed for driving fry so as not to damage the fry or affect the screening efficiency, nor does it need to be limited to use in an environment with water flow. Therefore, it is more convenient to use and has a wider range of applications.

[0025] Among them, the bottom surface of the sieve 1 is convex upward at intervals, and a plurality of the convexes are connected in sequence to form a undulating structure 4. Since the fry swim horizontally, if the bottom surface of the sieve 1 is set as a flat structure, the probability that smaller fry swim out of the sieve 1 through the four side surfaces of the sieve 1 is relatively large, and the probability of swimming out from the bottom surface of the sieve 1 is relatively small. Therefore, in this embodiment, the bottom surface of the sieve 1 is designed as the undulating structure 4, which shortens the horizontal swimming space of the fry, increases the contact range between the fry and the sieve 1, and thus increases the probability that the fry swim out from the bottom surface of the sieve 1. Therefore, when the probability of swimming out from the side surface of the sieve 1 remains unchanged, the probability that the fry swim out from the bottom surface of the sieve 1 is increased, thereby improving the fry screening efficiency.

[0026] Specifically, the driving device 3 can be set as an existing vibrator or ultrasonic fish driver. A vibrator is a device or equipment that can generate mechanical vibration or oscillation. The working principle is usually to generate mechanical vibration by exciting a vibration source (such as a motor, electromagnet or piezoelectric element). These vibrations can be periodic, random or at a specific frequency, depending on the application requirements. The vibrator in this embodiment is installed on the floating body 2 to drive the sieve 1 to vibrate, so that the fry are stimulated, achieving the purpose of non-contact driving of fry. Ultrasonic fish driving is a method of using ultrasonic technology to drive or guide fish schools. This technology usually affects the auditory system or behavior of fish through ultrasonic waves propagated in water, so as to achieve the effect of driving fish schools. The principle of ultrasonic fish driving is to use ultrasonic waves to cause discomfort or warning reactions in fish, so that they leave a specific area or move in a specific direction. This method is usually regarded as a non-invasive method and will not cause substantial harm to fish. The model of the ultrasonic fish driver in this embodiment can adopt ATA-L2, which is installed on the floating body 2 to emit ultrasonic waves to cause discomfort or warning reactions in fish, achieving the purpose of non-contact driving of fry.

[0027] Specifically, two driving devices 3 can be set, and the two driving devices 3 are respectively arranged on two opposite sides of the floating body 2. During use, the two driving devices 3 work intermittently in turn to drive the fry to swim back and forth in the sieve 1, improving the screening efficiency.

[0028] Furthermore, handles 5 adjacent to the two driving devices 3 can be respectively arranged on the other two opposite sides of the floating body 2, which is convenient for moving and lifting the sieve 1; the handles 5 penetrate the floating body 2 and are welded to the sieve 1 to improve the stability.

[0029] Specifically, the top of the undulating structure 4 can be set to have a rounded corner, so that it is not easy to damage the fry when being impacted by the fry.

[0030] Specifically, the floating body 2 can adopt a frame-shaped foam floating board, and the floating body 2 is fixedly connected to the top edge of the screen 1 along the top edge of the screen 1. The above-mentioned foam floating board is made of a light foam material, such as polyethylene foam or polyurethane foam. Since both the driving device 3 and the screen 1 are relatively heavy, compared with ordinary materials such as wooden boards and PVC pipes, the foam floating board can provide a relatively large buoyancy for the floating body 2 while being relatively light itself, thereby preventing the screen 1 from sinking to the bottom.

[0031] It should be noted that since the driving device 3 of this embodiment belongs to an electronic product and is easily damaged by water, the driving device 3 can be placed in a waterproof bag and then embedded in the floating board. With the certain waterproof ability of the foam floating board, it can effectively prevent the driving device 3 from being soaked by water.

[0032] The usage method or working principle of the present utility model is as follows:

[0033] First, the entire screen 1 is placed in a preset water body. Since the floating body 2 provides an upward buoyancy, the floating body 2 floats on the water surface, and the screen 1 is submerged under the water surface. Then, the fry to be screened are gently poured into the screen 1 along the water surface, and the driving device 3 is started to non-contact stimulate the fry, so that the fry swim by themselves. The fry smaller than the mesh aperture of the screen 1 will swim out of the screen 1 and enter the preset water body, and the fry larger than the mesh aperture of the screen 1 will stay in the screen 1, thereby achieving the purpose of size screening. Since the fry mostly swim horizontally, the undulating structure 4 shortens the horizontal swimming space of the fry and increases the contact range between the fry and the screen 1, thereby increasing the probability of the fry swimming out from the bottom surface of the screen 1.

[0034] The above-mentioned embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A fry screening net, comprising a screen (1) and a floating body (2) arranged on the screen (1), wherein the floating body (2) can float on the water surface; characterized in that: The floating body (2) is provided with a driving device (3) capable of driving away fry without contact; the bottom surface of the screen (1) is protruded upward in a spaced manner, and a plurality of the protrusions are connected in sequence to form an undulating structure (4).

2. A fry screening net according to claim 1, characterized in that: The driving device (3) is a vibrator or an ultrasonic fish driving device.

3. A fry screening net according to claim 1, characterized in that: Two driving devices (3) are provided, and the two driving devices (3) are respectively arranged on two opposite sides of the floating body (2).

4. A fry screening net according to claim 3, characterized in that: The floating body (2) is provided with handles (5) adjacent to the two driving devices (3) on two opposite sides thereof, respectively; the handles (5) penetrate through the floating body (2) and are fixedly connected to the screen (1).

5. A fry screening net according to claim 1, characterized in that: The top of the undulating structure (4) is arranged to have rounded corners.

6. A fry screening net according to claim 1, characterized in that: The floating body (2) is a frame-type foam floating board, and the floating body (2) is fixedly connected to the screen (1) along the top edge of the screen (1).

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