A curved inflow fish suction pump utilizing inertial force and boundary layer effect

Abstract

The invention discloses a curved inflow type fish suction pump utilizing inertial force and boundary layer effect. The pump comprises a suction pipe, a delivery pipe and a steering pipe connecting the suction pipe and the delivery pipe. A water suction branch pipe is embedded and installed in the same direction on one side of the delivery pipe. An isolation plate is installed at the water inlet end of the water suction branch pipe. A water suction pump is installed on the water suction branch pipe. During the operation of the pump body, the suction pipe generates suction, which can suck fish and water near the inlet of the suction pipe into the pipe together. The water flow and the fish accelerate when moving toward the pipe. When the water and the fish are sucked to the steering pipe, the water and the fish have a certain speed. Under the action of centrifugal force, the fish are made to get close to the outer wall of the steering pipe, away from and pass over the suction port of the inner pump, and finally the fish are brought out of the delivery pipe by the water flow. Since the impeller is arranged in the pipe, water is not sucked from another pipe. When the impeller rotates, the pipe generates a larger suction, and the suction force on the fish and water is also relatively large, thereby improving the efficiency of fish suction.

Description

Technical Field

[0001] The invention relates to fishing equipment, in particular to a fish suction pump. Background Art

[0002] At present, marine fisheries have shifted from being mainly captured to being mainly aquaculture, so cage aquaculture technology used for marine aquaculture has developed rapidly; cage aquaculture technology was first developed in the United States, and my country started late, and the intelligence and mechanization of cage aquaculture are still insufficient; in early 2019, the Ministry of Agriculture and Rural Affairs and 10 other departments issued the "Several Opinions on Accelerating the Green Development of the Aquaculture Industry", which clearly advocated the vigorous development of cage aquaculture industry, and the cage aquaculture industry has developed rapidly. When harvesting fish from cages or farming fish in boxes, manual catching is slow, causes great damage to fish, and is labor-intensive, which urgently requires the development of efficient fish catching methods; in the process of fishery mechanization, fish suction pumps are advanced equipment for catching and unloading fishery products, which can reduce labor intensity, improve the level of mechanization and automation, and greatly reduce the labor required for catching and sorting fish; currently, the technologies for fish suction pumps at home and abroad mainly include centrifugal fish suction pumps, pneumatic fish suction pumps, vacuum fish suction pumps, and jet fish suction pumps; fish suction pumps that do not damage fish are mainly vacuum fish suction pumps and jet fish suction pumps. Vacuum fish suction pumps have intermittent problems, and jet fish suction pumps spray water outside the suction tube into the tube, resulting in a slow flow rate and low fish suction efficiency. These two technologies still have the problem of low efficiency. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a curve inflow type fish suction pump which has strong adaptability and high efficiency and utilizes inertial force and boundary layer effect.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A curved inflow fish suction pump utilizing inertial force and boundary layer effect comprises a suction pipe, a delivery pipe and a steering pipe having a circular tubular inner wall connected between the suction pipe and the delivery pipe, a water pumping branch pipe is embedded and installed in the same direction on one side of the delivery pipe corresponding to the suction pipe, a water inlet end of the water pumping branch pipe is communicated with the steering pipe, a water outlet end of the water pumping branch pipe is communicated with the delivery pipe, an isolation plate is installed at the water inlet end of the water pumping branch pipe, a water inlet hole is provided on the isolation plate, and a water pump is installed on the water pumping branch pipe.

[0006] An installation opening is provided on the inner side of the steering pipe, a connecting boss is embedded in the installation opening, a connecting cavity is provided on the connecting boss, the water inlet end of the pumping branch pipe is connected to the opening of the connecting cavity, a water inlet is provided on one side of the connecting cavity corresponding to the conveying pipe, and the isolation plate is installed on the water inlet.

[0007] An extension surface adapted to the inner wall of the suction pipe is provided at the bottom of the connecting boss, and the extension surface extends into the steering pipe.

[0008] The angle between the suction pipe and the delivery pipe is 45° to 135°.

[0009] The distance from the extension surface to the steering pipe is 0 to D, wherein the inner diameters of the suction pipe, the delivery pipe and the steering pipe are all D.

[0010] The water pump is an axial flow pump, which includes a first impeller axially installed in the connecting cavity, a first drive motor is installed on the outer side of the connecting boss, and a rotating shaft of the first drive motor drives the first impeller to rotate.

[0011] The axis of the first impeller is 1 / 4D to D away from the axis of the delivery pipe, and the distance from the upper surface of the steering pipe to the center of the first impeller on the vertical plane is D to 5D, wherein the inner diameters of the suction pipe, the delivery pipe and the steering pipe are all D.

[0012] The water pump is a centrifugal pump, the water inlet of the centrifugal pump is connected to the opening of the connecting cavity, the water outlet of the centrifugal pump is connected to the water pumping branch pipe, a second impeller is installed in the centrifugal pump, a second drive motor is installed on the outside of the connecting boss, and the second drive motor drives the second impeller to rotate.

[0013] The axis of the second impeller is 1 / 4D to D away from the axis of the delivery pipe, and the distance from the upper surface of the steering pipe to the center of the second impeller on the vertical plane is D to 5D, wherein the inner diameters of the suction pipe, the delivery pipe and the steering pipe are all D.

[0014] A plurality of rollers are rotatably mounted on the isolation plate.

[0015] The beneficial effects of the present invention are as follows: the present invention embeds and installs a water suction branch pipe in a conveying pipeline, and installs a water suction pump on the water suction branch pipe, and the motor inputs work to the pump body through the transmission shaft. During the operation of the pump body, the suction pipe generates suction, and this suction can suck the fish and water near the inlet of the suction pipe into the pipe together; the water flow and the fish accelerate when moving toward the pipe, and when they are sucked into the turning pipe, the water and the fish have a certain speed, and under the action of centrifugal force, the fish are close to the outer wall of the turning pipe, away from and over the suction port of the inner pump, and finally the fish are taken out of the conveying pipe by the water flow; in addition, at the lower part of the water suction branch pipe, the water and the fish are sucked into the turning pipe. A connecting boss is arranged at the bottom, which is embedded in the steering pipe. An extension surface is arranged at the bottom of the connecting boss. Water flow will form a boundary layer effect in the space at the water inlet and in the concave cavity of the boss and generate a recirculation zone. The reflux zone is utilized to slow down the lateral suction speed and reduce the suction force on the fish, so as to avoid the suction force of the pump being too strong and the fish being adsorbed on the isolation plate. At the same time, the extension surface extends the length of the suction pipe, thereby providing sufficient speed inertia for the fish and water to move to the outer wall. Since the impeller is placed in the pipe, water is not sucked from another pipe. When the impeller rotates, the pipe generates a greater suction force, and the suction force on the fish and water is also relatively large, thereby improving the efficiency of sucking fish. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of a first embodiment of the present invention;

[0018] Figure 2 is a cross-sectional schematic diagram of a first embodiment of the present invention;

[0019] Figure 3 is an exploded schematic diagram of a first embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of a second embodiment of the present invention;

[0021] Figure 5 is a cross-sectional schematic diagram of a second embodiment of the present invention;

[0022] Figure 6 is an exploded schematic diagram of a second embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the connecting boss;

[0024] Figure 8 is a cross-sectional schematic diagram of a first embodiment of a roller;

[0025] Fig. 9 is a cross-sectional schematic diagram of a second embodiment of a roller;

[0026] Fig.10 Is applied to Fig. 9 A schematic cross-sectional view of a roller separator plate;

[0027] Fig.11 It is a schematic diagram of the flow direction of water in the pump body;

[0028] Fig.12 It is a schematic diagram of the boundary layer velocity gradient of water flow in the pump body. DETAILED DESCRIPTION

[0029] Reference Figures 1 to 12 A bend inflow fish suction pump utilizing inertial force and boundary layer effect comprises a suction pipe 1, a delivery pipe 2 and a steering pipe 3 whose inner wall is a circular tube connected between the suction pipe 1 and the delivery pipe 2. The suction pipe 1, the delivery pipe 2 and the steering pipe 3 can be integrally formed or joined in sections. In the present embodiment, the angle between the suction pipe 1 and the delivery pipe 2 is 45° to 135°, preferably 90° to 135°. A water pumping branch pipe 4 is embedded and installed in the same direction on one side of the delivery pipe 2 corresponding to the suction pipe 1. The water inlet end of the water pumping branch pipe 4 is communicated with the steering pipe 3, and the water outlet end of the water pumping branch pipe 4 is communicated with the delivery pipe 2. An isolation plate 5 is installed at the water inlet end of the water pumping branch pipe 4, and the isolation plate 5 has a water inlet hole. The water pump is installed on the water suction branch pipe 4. The water suction branch pipe is embedded in the conveying pipeline and the water pump is installed on the water suction branch pipe. The motor inputs work to the pump body through the transmission shaft. During the operation of the pump body, the suction pipe generates suction force, which can suck the fish and water near the inlet of the suction pipe into the pipeline together. The water flow and the fish accelerate when moving toward the pipeline. When they are sucked to the turning pipeline, the water and the fish have a certain speed, and under the action of centrifugal force, the fish are close to the outer wall of the turning pipeline, away from and over the suction port of the inner pump, and finally the fish are taken out of the conveying pipeline by the water flow pumped out of the pump body. Since the impeller is placed in the pipeline, it does not suck water from another pipeline. When the impeller rotates, the pipeline generates a large suction force, and the suction force on the fish and water is also relatively large, thereby improving the efficiency of sucking fish.

[0030] The inner side of the steering pipe 3 is provided with an installation opening 6, and the installation opening 6 is embedded with a connecting boss 7, and a connecting cavity 8 is provided on the connecting boss 7. The water inlet end of the water pumping branch pipe 4 is connected to the opening of the connecting cavity 8, and a water inlet 9 is provided on the side of the connecting cavity 8 corresponding to the delivery pipe 2. The isolation plate 5 is installed on the water inlet 9, and an extension surface 10 adapted to the inner wall of the suction pipe 1 is provided at the bottom of the connecting boss 7, and the extension surface 10 extends into the steering pipe 3. In this embodiment, the inner diameters of the suction pipe 1, the delivery pipe 2 and the steering pipe 3 are all D, and the extension surface 10 extends to the steering pipe. 3 is 0~D, preferably 1 / 4D~1 / 2D. The distance from the extension surface 10 to the steering pipe 3 is the embedded installation distance of the connecting boss 7. A connecting boss is arranged at the lower part of the water pumping branch pipe, and the connecting boss is embedded and installed in the steering pipe. An extension surface is arranged at the bottom of the connecting boss. The water flow will form a boundary layer effect in the space at the water inlet and the boss cavity, and generate a reflow zone. The reflow zone is used to slow down the lateral suction speed and reduce the suction force on the fish, so as to avoid the suction force of the pump being too strong and the fish being adsorbed on the isolation plate. At the same time, the extension surface can extend the length of the suction pipe, thereby providing sufficient speed inertia for the fish and water to move to the outer wall.

[0031] The water pump has the following two implementation modes:

[0032] The first embodiment is that the water pump is an axial flow pump, which includes a first impeller 11 axially installed in the connecting cavity 8, and a first drive motor 12 is installed on the outer side of the connecting boss 7. The rotating shaft of the first drive motor 12 drives the first impeller 11 to rotate. In this embodiment, the rotating shaft of the first drive motor 12 adopts a helical gear to drive the first impeller 11 to rotate. The axis of the first impeller 11 is 1 / 4D~D away from the axis of the delivery pipeline 2. The installation height of the impeller on the vertical plane is D~5D from the upper surface of the steering pipeline 3 to the center of the impeller. Among them, the inner diameters of the suction pipeline, the delivery pipeline and the steering pipeline are all D. The water outlet end of the water pumping branch pipe 4 is provided with a guide slope 13. The upper half of the water pumping branch pipe 4 transitions to the delivery pipeline 2 at a certain angle, which reduces the resistance between the water flow and the pipeline and reduces the energy loss of the water flow. In addition, the water pumping branch pipe 4 can be upright, outlet contracted or expanded as a whole. The outlet contraction shape can increase the flow rate at the same flow rate.

[0033] The second implementation mode is that the water pump is a centrifugal pump, the water inlet of the centrifugal pump is connected to the opening of the connecting cavity 8, the water outlet of the centrifugal pump is connected to the water pumping branch pipe 4, a second impeller 14 is installed in the centrifugal pump, a second drive motor 15 is installed on the outer side of the connecting boss 7, and the second drive motor 15 drives the second impeller 14 to rotate. In this embodiment, the axis of the second impeller 14 is 1 / 4D~D away from the axis of the conveying pipe 2, and the distance from the upper surface of the steering pipe 3 to the center of the second impeller 14 on the vertical plane is D~5D, wherein the inner diameters of the suction pipe 1, the conveying pipe 2 and the steering pipe 3 are all D, and the water outlet of the pump body of the centrifugal pump can be circular, elliptical, semicircular, etc.; in addition, both pump bodies are connected using sealing rings and bolts.

[0034] The isolation plate 5 is made of a rigid material with a mesh structure, and the surface of one side close to the inner wall of the steering pipe 3 is smooth. The surface can be made smooth by spraying protective material to prevent the fish from being damaged by friction when passing through the surface of the isolation plate 5. A number of rollers 16 can be rotatably installed on the isolation plate 5. The roller-type structure is provided with rollers on the original basis. The inner wall of the roller is installed with a bearing 17. The roller can rotate freely. When the fish is adsorbed on it, due to the upward flow velocity in the pipeline, the fish moves upward under the upward force, and the roller can roll to send the fish to the exit. In addition, the roller can also be electrically driven to actively roll the adsorbed fish. The fish attached to the isolation plate can be transported up. One way is to install a positive and negative magnet 18 between the roller 16 and the bearing 17, and provide a wire tube on the isolation plate. A bidirectional wire 19 is installed in the guide tube. After the wire passes through, the roller 16 can be driven to rotate. Another way is to install a roller shaft on the isolation plate, and the roller is fixedly installed on the roller shaft. One end of the roller shaft is connected to a driving motor, and the roller is driven to rotate by the rotation of the motor; the isolation plate 5 is parallel to the axis of the conveying pipe 2, and the isolation plate is welded to the water inlet of the connecting boss to ensure that the fish can pass through the steering pipe 3 smoothly and generate enough speed to be transported upward to avoid being affected by the suction of the pump body before turning.

[0035] The above implementation modes cannot limit the protection scope of the present invention. The equivalent modifications and changes made by those skilled in the art without departing from the overall concept of the present invention are still within the scope of the present invention.

Claims

1. A curved inflow fish suction pump utilizing inertial force and boundary layer effect, characterized in that It comprises a suction pipe (1), a delivery pipe (2), and a turning pipe (3) connecting the suction pipe (1) and the delivery pipe (2) and having a circular tube-shaped inner wall, wherein a water extraction branch pipe (4) is embedded and installed in the same direction on one side of the delivery pipe (2) corresponding to the suction pipe (1), the water inlet end of the water extraction branch pipe (4) is in communication with the turning pipe (3), the water outlet end of the water extraction branch pipe (4) is in communication with the delivery pipe (2), the water inlet end of the water extraction branch pipe (4) is installed with an isolation plate (5), the isolation plate (5) has a water inlet hole, and the water extraction branch pipe (4) is installed with a water pump; The inner side of the steering pipe (3) is provided with an installation opening (6), a connecting boss (7) is embedded in the installation opening (6), a connecting cavity (8) is provided on the connecting boss (7), the water inlet end of the water pumping branch pipe (4) is connected to the opening of the connecting cavity (8), a water inlet (9) is provided on a side of the connecting cavity (8) corresponding to the conveying pipe (2), and the isolation plate (5) is installed on the water inlet (9); An extension surface (10) adapted to the inner wall of the suction pipe (1) is provided at the bottom of the connecting boss (7), and the extension surface (10) extends into the steering pipe (3).

2. The fish suction pump using inertial force and boundary layer effect according to claim 1 is characterized in that The angle between the suction pipe (1) and the delivery pipe (2) is 45° to 135°.

3. The fish suction pump using inertial force and boundary layer effect according to claim 1 is characterized in that The distance that the extension surface (10) extends into the steering pipe (3) is 0 to D, wherein the inner diameters of the suction pipe (1), the delivery pipe (2) and the steering pipe (3) are all D.

4. The fish suction pump using inertial force and boundary layer effect according to claim 1 is characterized in that The water pump is an axial flow pump, comprising a first impeller (11) axially mounted in the connecting cavity (8), a first drive motor (12) being mounted on the outside of the connecting boss (7), and a rotating shaft of the first drive motor (12) driving the first impeller (11) to rotate.

5. The fish suction pump using inertial force and boundary layer effect according to claim 4 is characterized in that The axis of the first impeller (11) is 1 / 4D to D away from the axis of the delivery pipe (2); the distance from the upper surface of the steering pipe (3) to the center of the first impeller (11) on a vertical plane is D to 5D, wherein the inner diameters of the suction pipe (1), the delivery pipe (2) and the steering pipe (3) are all D.

6. The fish suction pump using inertial force and boundary layer effect according to claim 1 is characterized in that The water pump is a centrifugal pump, the water inlet of the centrifugal pump is connected to the opening of the connecting cavity (8), the water outlet of the centrifugal pump is connected to the water pumping branch pipe (4), a second impeller (14) is installed in the centrifugal pump, and a second drive motor (15) is installed on the outside of the connecting boss (7), and the second drive motor (15) drives the second impeller (14) to rotate.

7. The fish suction pump using inertial force and boundary layer effect according to claim 6 is characterized in that The axis of the second impeller (14) is 1 / 4D to D away from the axis of the delivery pipe (2); the distance from the upper surface of the steering pipe (3) to the center of the second impeller (14) on a vertical plane is D to 5D, wherein the inner diameters of the suction pipe (1), the delivery pipe (2) and the steering pipe (3) are all D.

8. The fish suction pump using inertial force and boundary layer effect according to claim 1, characterized in that A plurality of rollers (16) are rotatably mounted on the isolation plate (5).

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