A centrifugal fish suction pump suitable for catching fish schools at sea

Abstract

The present invention relates to a centrifugal fish suction pump suitable for catching fish schools at sea, and belongs to the technical field of fishery equipment. In the first aspect of the present invention, an impeller is formed by cutting a cylinder with a special flow path trajectory, and a gradual fish passage is formed on the cylindrical surface, which provides centrifugal force for the operation of the fish suction pump. At the same time, the smooth flow path structure greatly reduces the damage to the fish body when the farmed fish pass through, and effectively reduces the economic losses caused by the damage to the fish body during the catching process. In the second aspect, an automated centrifugal catching method is adopted, which greatly improves the catching efficiency and the management efficiency of large net cages compared to the traditional fishing crane basket catching method, and greatly reduces the catching power consumption compared to the vacuum fish suction pump, and has good practicality. On the other hand, by redesigning the size of the impeller of the centrifugal fish suction pump, it can also be used to catch live farmed aquatic products in other aquaculture waters, and has a wide range of applicability.

Description

Technical Field

[0001] The invention relates to the technical field of fishery equipment, in particular to a centrifugal fish suction pump suitable for catching fish schools at sea. Background Art

[0002] Since 2017, domestic large-scale deep-sea aquaculture cages have been booming, and more than 30 large-scale deep-sea aquaculture cages have been launched. The expansion of aquaculture space to the open sea is an inevitable trend for the future development of the marine fish industry. The aquaculture capacity of large-scale deep-sea cages is large, and there are two main ways to catch fish: one is to use a vacuum fish suction pump, which has the characteristics of high automation, high work efficiency and low labor intensity. The vacuum fish suction pump uses intervals to pump out the air inside the fish collection tube to achieve a certain vacuum degree. The atmospheric pressure difference between the water inlet and the fish collection tube can be used to suck the fish and water mixture into the fish collection tube. At the same time, the vacuum fish suction pump uses the pressure difference between the inside and outside of the fish collection tube to make the pipeline flow rate too large, which is easy to cause the fish to squeeze each other and the fish body to be damaged by severe impact, affecting the quality of the farmed fish. Another way is to use the long-arm crane of the aquaculture function ship or aquaculture platform to hoist the hanging basket for repeated catching until the catching task is completed, and the catching efficiency is low. The present invention has developed a centrifugal fish suction pump suitable for capturing large-scale farmed fish schools, which can achieve efficient capture of fish schools while also ensuring the integrity of the body surface of farmed fish schools, providing equipment and technical support for deep-sea industrial aquaculture. Summary of the invention

[0003] The invention overcomes the shortcomings of the prior art and provides a centrifugal fish suction pump suitable for catching fish schools at sea.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A first aspect of the present invention provides a centrifugal fish suction pump suitable for catching fish schools at sea, comprising a driving motor, wherein an output end of the driving motor is connected to a reducer, and the other end of the reducer is connected to a pump body.

[0006] Wherein, an impeller is arranged inside the pump body, the impeller is a cylindrical structure, and the inside of the impeller is cut and formed along a preset characteristic curve trajectory, so that the center of gravity of the impeller is located on the axis of the impeller, thereby forming a cylindrical curved surface gradient channel, forming a preset flow path trajectory;

[0007] The flow channel track is formed by a plurality of space curves connected smoothly and has a spiral upward trend, and each of the space curves is connected by arcs or straight lines.

[0008] Furthermore, in a preferred embodiment of the present invention, the spatial curves are smoothly connected to each other and can cut the cylindrical structure of the impeller along a flow path trajectory with a geometric circle of a preset radius to form a smooth fish-passing channel, and the flow path trajectory ensures that the center of gravity of the impeller is always on the axis of the impeller.

[0009] Furthermore, in a preferred embodiment of the present invention, an outer cover is installed on the outer side of the pump body, one end of the pump body is connected to the water inlet pipe, and the other end is connected to the water outlet pipe.

[0010] Furthermore, in a preferred embodiment of the present invention, a threaded hole fixedly connected to the drive motor is provided on one side of the impeller, and a limiting groove is provided on the other side, and the limiting groove cooperates with the limiting block to limit the radial displacement of the impeller during rotation.

[0011] Furthermore, in a preferred embodiment of the present invention, a bearing is installed inside the limit block, and the bearing can support the impeller to rotate.

[0012] Furthermore, in a preferred embodiment of the present invention, a gradually changing curved surface can be formed on the outer side of the cylinder of the impeller, so that during the rotation of the impeller, the curved surface pushes the water flow to generate centrifugal force for the water to flow toward the outlet pipe, thereby forming a negative pressure inside the impeller, and under the action of atmospheric pressure, the fish and water mixture is sucked into the impeller and pushed to the water inlet pipe of the fish suction pump.

[0013] A second aspect of the present invention provides a method for using a centrifugal fish suction pump suitable for catching fish schools at sea, which is applied to any one of the centrifugal fish suction pumps suitable for catching fish schools at sea, and comprises the following steps:

[0014] Acquire image data information of the ocean within the target area, and obtain image data information of the topography of the ocean by filtering and denoising the image data information of the ocean within the target area;

[0015] By identifying the topographic image data information of the ocean, the ocean area where the target fish school may live and inhabit is obtained;

[0016] Acquire image data information of a nearby ocean area where the target fish school may live and inhabit, and construct a migration route of the fish school's feeding behavior based on the image data information of the nearby ocean area;

[0017] The short-term migration route of the target fish school is estimated according to the migration route of the fish school's feeding behavior, and the best fishing position node is selected based on the short-term migration route of the target fish school, and a new centrifugal fish suction pump is arranged according to the best fishing position node.

[0018] Furthermore, in a preferred embodiment of the present invention, the ocean area where the target fish school may live and inhabit is obtained by identifying the topographic image data information of the ocean, which specifically includes:

[0019] Obtaining preferred habitat data information of various fish types through big data, and constructing a database, inputting the preferred habitat data information of various fish types into the database for storage, and regularly updating the database;

[0020] Obtaining data information on the type of fish to be caught, and inputting the data information on the type of fish to be caught into the database for identification, to obtain preferred habitat data information on the type of fish to be caught;

[0021] Calculate the correlation between the preferred habitat data information of the target fish type and the topographic image data information of the ocean by using the grey correlation analysis method to obtain the correlation degree information;

[0022] Acquire topographic image data information of an ocean whose correlation degree information is greater than preset correlation degree information, and acquire an ocean area where a target fish school may live and inhabit based on the topographic image data information of the ocean whose correlation degree information is greater than preset correlation degree information.

[0023] Furthermore, in a preferred embodiment of the present invention, obtaining image data information of a nearby ocean area where the target fish school may live and inhabit, and constructing a migration route of the fish school's feeding behavior based on the image data information of the nearby ocean area specifically includes:

[0024] Acquire image data information of nearby ocean areas where the target fish school may live and inhabit;

[0025] By identifying the image data information of the nearby ocean area where the target fish school may live and inhabit, the image data information of the natural enemy fish related to the target fish school within a preset time is obtained;

[0026] Acquire the migration position information of the natural enemy fish related to the target fish school when feeding according to the natural enemy fish image data information related to the target fish school within the preset time;

[0027] Based on the migration position information of natural enemy fish related to the target fish school when feeding, one or more migration routes of the fish school's feeding behavior are constructed.

[0028] Furthermore, in a preferred embodiment of the present invention, the short-term migration route of the target fish school is estimated according to the migration route of the fish school's feeding behavior, and the best fishing position node is selected based on the short-term migration route of the target fish school, and a new centrifugal fish suction pump is arranged according to the best fishing position node, which specifically includes:

[0029] Acquire the relevant ocean area of ​​the fish school feeding behavior according to the migration route of the fish school feeding behavior, taking the relevant ocean area of ​​the fish school feeding behavior as the starting point;

[0030] Taking the ocean area where the target fish group may live as the end point, constructing the relevant short-term migration route of the target fish group based on the end point and the starting point;

[0031] Randomly selecting the short migration route of the target fish school as the best fishing position node;

[0032] A new centrifugal fish suction pump is arranged in advance according to the optimal fishing position node.

[0033] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0034] In the first aspect of the present invention, the impeller is formed by cutting a cylinder through a special flow path, and a gradual fish passage is formed on the cylindrical surface, which provides centrifugal force for the operation of the fish suction pump. At the same time, the smooth flow path structure greatly reduces the damage to the fish body when the farmed fish pass through, and effectively reduces the economic losses caused by the damage to the fish body during the catching process. The second aspect adopts an automated centrifugal catching method, which greatly improves the catching efficiency and the management efficiency of large net cages compared to the traditional fishing crane basket catching method, and greatly reduces the power consumption of catching compared to the vacuum fish suction pump, and has good practicality. On the other hand, by redesigning the size of the impeller of this centrifugal fish suction pump, it can also be used to catch live farmed aquatic products in other aquaculture waters, and has a wide range of applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0036] Figure 1 The overall structure schematic diagram of a centrifugal fish suction pump suitable for catching fish schools at sea is shown;

[0037] Figure 2 A schematic cross-sectional structure diagram of a centrifugal fish suction pump suitable for catching fish schools at sea is shown;

[0038] Figure 3 A partial structural schematic diagram of a centrifugal fish suction pump suitable for catching fish schools at sea is shown;

[0039] Figure 4A partial cross-sectional structural schematic diagram of a centrifugal fish suction pump suitable for catching fish schools at sea is shown.

[0040] In the figure:

[0041] 1. Driving motor, 2. Reducer, 3. Pump body, 4. Impeller, 5. Water outlet pipe, 6. Water inlet pipe, 7. Outer cover, 8. Limit block, 9. Bearing, 10. Limit groove. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the structures related to the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified 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 internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0045] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0046] like Figure 1 as well as Figure 2 As shown, the first aspect of the present invention provides a centrifugal fish suction pump suitable for catching fish schools at sea, the centrifugal fish suction pump is composed of a driving motor 1, a reducer 2, a pump body 3, an inlet pipe 6, an outlet pipe 5 and other parts, wherein the pump body 3 is provided with an impeller 4, an outer cover and other parts.

[0047] like Figure 3 as well as Figure 4 As shown, the impeller 4 is a cylindrical structure, and a gradual fish conveying channel is opened on the outer circumferential surface of the impeller along the characteristic curve trajectory. The channel is formed by cutting a circle of a certain diameter along the characteristic curve trajectory, and at the same time, the center of gravity of the impeller after cutting is ensured to be located on the axis to avoid dynamic imbalance during the rotation of the impeller, thereby forming a fish passing channel with a gradual cylindrical surface; a threaded hole fixedly connected to the drive motor 1 is opened on one side of the impeller 4, and a limiting groove 10 is opened on the other side. The limiting groove 10 cooperates with the limiting block 8 to limit the radial displacement of the impeller 4 during the rotation process, thereby increasing the stability of the impeller 4 during the rotation process, and a bearing 9 is installed inside the limiting block 8 to support the rotation of the impeller 4.

[0048] like Figure 3 as well as Figure 4 As shown, in particular, the flow path is formed by the smooth connection of 5 space curves, which are generally in a spiral upward trend, and are composed of AB, BC, CD, DF, and FG. Among them, the curves AB, BC, CD, and DF are arcs of radius R1, R2, R3, and R4 respectively, and DF is a straight line. The smooth connection between the two space curves enables the cylinder to be cut along the trajectory line with a geometric circle with a radius of r to form a smooth fish passage. The trajectory curve satisfies that the center of gravity of the cylinder after cutting along the trajectory curve is still on the axis, thereby ensuring that no excessive eccentric force is generated during the rotation of the impeller to affect the service life of the impeller and generate noise. At the same time, a gradual curved surface is formed on the outside of the cylinder. During the rotation of the impeller 4, the curved surface pushes the water flow to generate centrifugal force to flow to the outlet pipe, forming a negative pressure inside the impeller 4, and the fish and water mixture is sucked into the impeller under the action of atmospheric pressure and pushed to the outlet of the fish suction pump. As described above, the entire fish suction channel of the impeller 4 is cut by the flow path, and the flow path is smooth without sharp corners, which ensures the automated fish suction operation, improves the breeding management efficiency, and effectively solves the problem of fish body damage during the fish suction operation.

[0049] Among them, the user's preparation work before fishing includes: based on the operating function ship or cage platform, install a new centrifugal fish suction pump, and use a clamp to fix one end of the water inlet hose to the water inlet pipe. Place the other end of the water inlet hose in the fish gathering area, and the water outlet hose in the fish collection warehouse. Pour water into the impeller of the fish suction pump from the fish outlet until the water submerges the impeller and the pump body. Use traditional net scraping or cable pulling methods to gather fish in large cages and increase the density of fish in seawater.

[0050] Furthermore, after the preparatory work before catching, the driving motor 1 is started to drive the reducer 2 and the impeller 4 of the pump body 3 to rotate. The fish farming catching work begins. During the catching process, the scraper net is continuously gathered to increase the fish density in the fish gathering area.

[0051] Furthermore, when it is necessary to stop the catching work: turn off the power supply of the driving motor 1, retract the water inlet hose and the water outlet hose, and loosen the hose clamp. Rinse the centrifugal fish suction pump body and impeller with fresh water to prevent seawater from corroding the parts.

[0052] In summary, in the first aspect of the present invention, the impeller is formed by cutting a cylinder with a special flow path trajectory, and a gradual fish passage is formed on the cylindrical surface, which provides centrifugal force for the operation of the fish suction pump. At the same time, the smooth flow path structure greatly reduces the damage to the fish body when the farmed fish pass through, and effectively reduces the economic losses caused by the damage to the fish body during the catching process. The second aspect adopts an automated centrifugal catching method, which greatly improves the catching efficiency and the management efficiency of large net cages compared to the traditional fishing crane basket catching method, and greatly reduces the power consumption of catching compared to the vacuum fish suction pump, and has good practicality. On the other hand, by redesigning the size of the impeller of this centrifugal fish suction pump, it can also be used to catch live farmed aquatic products in other aquaculture waters, and has a wide range of applicability.

[0053] A second aspect of the present invention provides a method for using a centrifugal fish suction pump suitable for catching fish schools at sea, which is applied to any one of the centrifugal fish suction pumps suitable for catching fish schools at sea, and comprises the following steps:

[0054] Acquire image data information of the ocean within the target area, and obtain image data information of the topography of the ocean by filtering and denoising the image data information of the ocean within the target area;

[0055] By identifying the topographic image data information of the ocean, the ocean area where the target fish school may live and inhabit is obtained;

[0056] Acquire image data information of a nearby ocean area where the target fish school may live and inhabit, and construct a migration route of the fish school's feeding behavior based on the image data information of the nearby ocean area;

[0057] The short-term migration route of the target fish school is estimated according to the migration route of the fish school's feeding behavior, and the best fishing position node is selected based on the short-term migration route of the target fish school, and a new centrifugal fish suction pump is arranged according to the best fishing position node.

[0058] It should be noted that the image data information of the ocean within the target area is obtained, and the image data information of the ocean topography is obtained by filtering and denoising the image data information of the ocean within the target area, specifically including: obtaining the image data information of the ocean within the target area, removing the shadow part in the image data information of the ocean within the target area, and grayscale conversion of the image data information of the ocean within the target area; after the grayscale conversion, eliminating the image hue and saturation information, and retaining the corresponding image brightness, filtering the grayscale converted image by the median filtering method to eliminate isolated noise points; performing edge detection on the grayscale converted image by the edge detection algorithm, segmenting the image by the fixed threshold method, and obtaining the segmentation result; extracting the topography and geomorphic features of the ocean by the segmentation result to obtain the topography and geomorphic image data information of the ocean, and outputting the topography and geomorphic image data information of the ocean.

[0059] Furthermore, in a preferred embodiment of the present invention, the ocean area where the target fish school may live and inhabit is obtained by identifying the topographic image data information of the ocean, which specifically includes:

[0060] Obtaining preferred habitat data information of various fish types through big data, and constructing a database, inputting the preferred habitat data information of various fish types into the database for storage, and regularly updating the database;

[0061] Obtaining data information on the type of fish to be caught, and inputting the data information on the type of fish to be caught into the database for identification, to obtain preferred habitat data information on the type of fish to be caught;

[0062] Calculate the correlation between the preferred habitat data information of the target fish type and the topographic image data information of the ocean by using the grey correlation analysis method to obtain the correlation degree information;

[0063] Acquire topographic image data information of an ocean whose correlation degree information is greater than preset correlation degree information, and acquire an ocean area where a target fish school may live and inhabit based on the topographic image data information of the ocean whose correlation degree information is greater than preset correlation degree information.

[0064] It should be noted that the grey correlation analysis method is a method of measuring the degree of correlation between factors based on the similarity or difference in the development trends between the factors, that is, the "grey correlation degree". The grey correlation analysis method is used to calculate the correlation between the preferred habitat data information of the target fish type and the topographic image data information of the ocean. When the correlation degree information is greater than the preset correlation degree information, it means that the topographic image data information of the ocean and the preferred habitat data information of the target fish type are very similar, indicating that the ocean area corresponding to the topographic image data information of the ocean is a habitat suitable for the target fish type.

[0065] Furthermore, in a preferred embodiment of the present invention, obtaining image data information of a nearby ocean area where the target fish school may live and inhabit, and constructing a migration route of the fish school's feeding behavior based on the image data information of the nearby ocean area specifically includes:

[0066] Acquire image data information of nearby ocean areas where the target fish school may live and inhabit;

[0067] By identifying the image data information of the nearby ocean area where the target fish school may live and inhabit, the image data information of the natural enemy fish related to the target fish school within a preset time is obtained;

[0068] Acquire the migration position information of the natural enemy fish related to the target fish school when feeding according to the natural enemy fish image data information related to the target fish school within the preset time;

[0069] Based on the migration position information of natural enemy fish related to the target fish school when feeding, one or more migration routes of the fish school's feeding behavior are constructed.

[0070] It should be noted that in nature, fish schools are affected by the feeding habits of their natural enemy fishes, and a certain temporary migration may occur during the feeding time period of a certain natural enemy fishes. When fishing during this period, fish schools are prone to temporary migration. By constructing one or more migration routes of the feeding behavior of fish schools based on the migration position information of the natural enemy fishes related to the target fish schools when feeding, the best fishing location point can be selected.

[0071] Furthermore, in a preferred embodiment of the present invention, the short-term migration route of the target fish school is estimated according to the migration route of the fish school's feeding behavior, and the best fishing position node is selected based on the short-term migration route of the target fish school, and a new centrifugal fish suction pump is arranged according to the best fishing position node, which specifically includes:

[0072] Acquire the relevant ocean area of ​​the fish school feeding behavior according to the migration route of the fish school feeding behavior, taking the relevant ocean area of ​​the fish school feeding behavior as the starting point;

[0073] Taking the ocean area where the target fish group may live as the end point, constructing the relevant short-term migration route of the target fish group based on the end point and the starting point;

[0074] Randomly selecting the short migration route of the target fish school as the best fishing position node;

[0075] A new centrifugal fish suction pump is arranged in advance according to the optimal fishing position node.

[0076] It should be noted that when the natural enemies of the relevant fish schools pass through the relevant sea areas, due to the instinct of survival, the target fish schools will temporarily migrate to other sea areas, such as the ocean areas where the target fish schools may survive and inhabit. This method can further screen out the best fishing position nodes, thereby improving the rationality of fishing with the new centrifugal fish suction pump.

[0077] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0078] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of this invention. The technical scope of this invention is not limited to the content in the specification, and the technology must be determined according to the scope of the claims.

Claims

1. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea. It is characterized in that The following steps are involved: Acquire image data information of the ocean within the target area, and obtain image data information of the topography of the ocean by filtering and denoising the image data information of the ocean within the target area; By identifying the topographic image data information of the ocean, the ocean area where the target fish school may live and inhabit is obtained; Acquire image data information of an ocean area where the target fish school may live and inhabit, and construct a migration route of the fish school's feeding behavior based on the image data information of the ocean area; estimating the short-term migration route of the target fish school according to the migration route of the fish school's feeding behavior, selecting the best fishing position node based on the short-term migration route of the target fish school, and arranging the centrifugal fish suction pump according to the best fishing position node; Acquiring image data information of an ocean area where the target fish school may live and inhabit, and constructing a migration route of the fish school's feeding behavior based on the image data information of the ocean area, specifically comprising: Acquire image data information of the ocean area where the target fish school may live and inhabit; By identifying the image data information of the ocean area where the target fish school may live and inhabit, obtaining the image data information of the natural enemy fish related to the target fish school within a preset time; Acquire the migration position information of the natural enemy fish related to the target fish school when feeding according to the natural enemy fish image data information related to the target fish school within the preset time; Constructing one or more migration routes of the feeding behavior of the school of fish based on the migration position information of the natural enemy fish related to the target school of fish when feeding; The centrifugal fish-suction pump comprises a driving motor, an output end of the driving motor is connected to a reducer, and the other end of the reducer is connected to a pump body. Wherein, an impeller is arranged inside the pump body, the impeller is a cylindrical structure, and the inside of the impeller is cut and formed along a preset characteristic curve trajectory, so that the center of gravity of the impeller is located on the axis of the impeller, thereby forming a cylindrical curved surface gradient channel, forming a preset flow path trajectory; The flow channel track is formed by a plurality of space curves connected smoothly and has a spiral upward trend, and each of the space curves is connected by arcs or straight lines.

2. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 1, It is characterized in that The space curves are smoothly connected to each other and can cut the cylindrical structure of the impeller along the flow path with a geometric circle of a preset radius to form a smooth fish-passing channel. The flow path ensures that the center of gravity of the impeller is always on the axis of the impeller.

3. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 1, It is characterized in that An outer cover is installed on the outer side of the pump body. One end of the pump body is connected to the water inlet pipe, and the other end is connected to the water outlet pipe.

4. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 1, It is characterized in that A threaded hole fixedly connected to the driving motor is provided on one side of the impeller, and a limiting groove is provided on the other side. The limiting groove cooperates with the limiting block to limit the radial displacement of the impeller during rotation.

5. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 4, It is characterized in that A bearing is arranged inside the limiting block, and the bearing can support the impeller to rotate.

6. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 1, It is characterized in that A gradually changing curved surface can be formed on the outer side of the cylinder of the impeller, and negative pressure is formed inside the impeller, so that the fish-water mixture is sucked into the impeller and pushed to the water inlet pipe of the fish suction pump under the action of atmospheric pressure.

7. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 1, It is characterized in that By identifying the topographic image data information of the ocean, the ocean area where the target fish school may live and inhabit is obtained, specifically including: Obtaining preferred habitat data information of various fish types through big data, and constructing a database, inputting the preferred habitat data information of various fish types into the database for storage, and regularly updating the database; Obtaining data information on the type of fish to be caught, and inputting the data information on the type of fish to be caught into the database for identification, to obtain preferred habitat data information on the type of fish to be caught; Calculate the correlation between the preferred habitat data information of the target fish type and the topographic image data information of the ocean by using the grey correlation analysis method to obtain the correlation degree information; Acquire topographic image data information of an ocean whose correlation degree information is greater than preset correlation degree information, and acquire an ocean area where a target fish school may live and inhabit based on the topographic image data information of the ocean whose correlation degree information is greater than preset correlation degree information.

8. A method for using a centrifugal fish suction pump suitable for catching fish schools at sea according to claim 1, It is characterized in that The method includes estimating the short-term migration route of the target fish school according to the migration route of the fish school's feeding behavior, selecting the best fishing position node based on the short-term migration route of the target fish school, and arranging the centrifugal fish suction pump according to the best fishing position node, specifically comprising: Acquire the relevant ocean area of ​​the fish school feeding behavior according to the migration route of the fish school feeding behavior, taking the relevant ocean area of ​​the fish school feeding behavior as the starting point; Taking the ocean area where the target fish group may live as the end point, constructing the relevant short-term migration route of the target fish group based on the end point and the starting point; Randomly selecting the short migration route of the target fish school as the best fishing position node; The centrifugal fish suction pump is arranged in advance according to the optimal fishing position node.

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