Nozzle assembly for water suction pump and water suction pump

Abstract

The utility model discloses a nozzle assembly for a water suction pump, belongs to the technical field of water suction pumps, solves the problem that an existing fish suction pump is discontinuous in water suction and fish suction, and mainly adopts the technical scheme that the nozzle assembly for the water suction pump comprises an inner shell with a first fluid channel formed in the inner side; the first fluid channel is provided with a first water inlet and a first water outlet, the inner shell is provided with a plurality of water injection nozzles, and the water injection nozzles are obliquely arranged in the direction of the first water outlet relative to the radial direction of the inner shell, so that water sprayed into the first fluid channel by the water injection nozzles inclines in the direction of the first water outlet. The water pump is mainly used for achieving continuity when the water pump pumps water and sucks fishes, and damage to the fishes is reduced.

Description

Technical Field

[0001] This application relates to the technical field of water pumps, and in particular to a nozzle assembly for a water pump and a water pump. Background Technology

[0002] Water pumps are widely used in aquaculture, fishing, and transportation. For example, in operations such as changing water in fish ponds, fishing, and transferring live fish before transportation, if ordinary water pumps are used without protective measures, fish can easily be sucked into the pump, causing injury or even death.

[0003] In existing technologies, centrifugal pumps utilize hydraulic principles to drive the impellers within the pump body at high speed, creating negative pressure to suck up fish. The impeller channels are relatively wide, and most are double-bladed, with the inlet and outlet directions perpendicular. While this method offers high energy conversion efficiency, the fish suffer significant damage and a high mortality rate as they pass through the high-speed rotation of the impellers.

[0004] Another type of water pump uses a high-speed water flow to create negative pressure when ejected from a nozzle. This forces the fish-injected water through the suction port and suction tube, and then into the fish-water separator along with the high-pressure water flow in the jet chamber. After filtration, the fish are obtained. This type of pump is less efficient when sucking up fish and water, and the pumping action is noticeably erratic, making it impossible to continuously pump water and suck up fish. Utility Model Content

[0005] In order to solve the problem of discontinuous water pumping and fish suction in existing fish suction pumps, this application provides a nozzle assembly for a water pump and a water pump, which can achieve continuity in water pumping and fish suction, and reduce damage to fish.

[0006] To achieve the above objectives, this application adopts the following technical solution: a nozzle assembly for a water pump, including an inner shell with a first fluid channel on its inner side, the first fluid channel having a first inlet and a first outlet, and a plurality of nozzles on the inner shell, wherein the nozzles are inclined relative to the radial direction of the inner shell toward the first outlet, so that the water flow injected into the first fluid channel by the nozzles is inclined toward the first outlet.

[0007] The above scheme alters the water flow direction by using tilted nozzles to create a high-speed jet with a specific flow direction. Its core principle is as follows: the nozzles are tilted radially towards the first outlet along the inner shell, causing the ejected water to have an axial velocity component (pointing towards the first outlet) when entering the first fluid channel. This axial velocity component generates a directional thrust, propelling the water flow towards the outlet and strengthening the overall axial flow tendency of the fluid. When the tilted water flow mixes with the existing water flow in the first fluid channel, momentum transfer increases the overall kinetic energy of the fluid. On one hand, the high-speed jet accelerates the surrounding water, creating a stronger negative pressure suction (similar to the Venturi effect), improving fish-attracting efficiency; on the other hand, the axially tilted water flow reduces turbulence and energy loss within the channel, concentrating energy to propel the water flow towards the outlet.

[0008] Traditional impeller pumps rely on high-speed rotating blades to generate suction, which can easily injure fish due to collisions and shearing forces. By adopting the above-mentioned technical solution, this application has the following advantages: Through an impeller-less fluid drive method, fish are drawn in using gentle negative pressure, and the water flows smoothly along the axial direction, avoiding direct mechanical damage to the fish from the blades. The inclined water flow creates a more uniform flow field, further reducing the impact and compression on the fish during the suction process.

[0009] Furthermore, multiple nozzles are distributed circumferentially along the axis of the inner shell and form a nozzle group; the extension lines of the nozzle axes within the same nozzle group intersect at the same position in the first fluid channel, which is the water flow convergence point of the nozzle group.

[0010] By adopting the aforementioned technical solution, by converging the extended axes of the nozzles of the same group of nozzles at the same water flow confluence point on the center line of the first fluid channel, a ring-shaped converging jet structure is formed. In this structure, multiple water flows form a centripetally converging high-speed jet bundle at the confluence point. When the multiple water flows collide with each other, a relatively vacuum area is generated, similar to the "water hammer effect". A stronger local negative pressure is generated in this area, which significantly improves the ability to inhale fish (or fluids).

[0011] Furthermore, several sets of nozzle groups are arranged at intervals along the axial direction of the first fluid channel, and the water flow confluence points of the several sets of nozzle groups are arranged at intervals along the flow direction of the fluid in the first fluid channel according to the arrangement order of the corresponding nozzle groups.

[0012] Using the aforementioned technical solution, the confluence point of the upstream nozzle group (near the inlet) is located upstream of the fluid, first forming a primary negative pressure zone near the suction inlet, attracting fish and water from afar to move towards the pump body; the confluence point of the downstream nozzle group moves downstream in sequence, forming a secondary / tertiary negative pressure zone in the middle of the fluid channel or near the outlet, producing a secondary acceleration effect on the already sucked fluid and fish. Furthermore, due to the "water hammer effect," the multi-stage nozzle group can form a long-distance negative pressure gradient zone in the direction of the pump body axis, making the negative pressure area larger and forming an adsorption area with a wider influence range, increasing the pump's ability to suck in fish (or fluid).

[0013] Furthermore, a plurality of water spray pipes are installed on the inner shell, and the water spray nozzles are located in the corresponding water spray pipes; the water spray pipes protrude from the inner wall of the first fluid channel and are inclined relative to the radial direction of the inner shell towards the first water outlet, and the part of the water spray pipe protruding from the first fluid channel has a streamlined structure.

[0014] By employing the aforementioned technical solution, an inclined water spray pipe is installed on the inner shell, and the spray nozzle is integrated inside the water spray pipe. This enhances the axial flow velocity of the guided water flow. The water spray pipe, through its built-in guide channel, maintains the water flow in a laminar state before it is ejected, avoiding jet dispersion caused by turbulence on the inner shell wall. If a traditional nozzle protrudes directly from the inner wall to form a right-angle step, a separation vortex is easily formed behind the protrusion when high-speed water flows through it, resulting in: increased local pressure drop (energy waste); and the vortex exerting additional impact on the fish (such as rotational torque causing the fish to flip over). In contrast, the streamlined structure of this application (such as an elliptical arc surface or a hyperboloid surface) allows the water flow to smoothly bypass the protruding part, and the separation point moves backward or disappears, thereby reducing the frictional resistance of the wall surface; and preventing the fish from colliding with the protruding structure (such as the sharp angle of the water spray pipe edge scratching the fish's fins).

[0015] Furthermore, the water spray pipe is threaded or welded to the inner shell.

[0016] Using the aforementioned technical solution, threaded connections allow for tool-free, quick disassembly of water hoses (e.g., by hand-tightening threads or quick-release nuts). When the water hose is clogged or worn, operators can replace individual hoses in a short time, significantly improving maintenance efficiency. Welding creates a permanent metallurgical bond, reducing the risk of leakage at the joint to near zero. Compared to threaded connections that rely on sealing rings (which may leak due to aging or improper installation), welded structures are more reliable under high-pressure conditions.

[0017] Furthermore, the water outlet end of the spray nozzle is flush with the inner wall of the first fluid channel; or, the end face of the water outlet end of the spray pipe is perpendicular to the axis of the spray nozzle.

[0018] By adopting the aforementioned technical solution, the water outlet is flush with the inner wall, which can avoid the water nozzle from protruding and forming a "step" or "protrusion", reducing turbulence and energy loss when the fluid flows through, and making the mainstream fluid (such as the working medium in the pump) flow more smoothly.

[0019] The outlet end face is perpendicular to the nozzle axis, and the jet direction is strictly axial (such as spraying towards the pump outlet). The jet angle is fixed and concentrated, which can increase the pumping kinetic energy of the pump body and is beneficial to increasing the pumping and fish suction efficiency of the pump body.

[0020] Furthermore, the spray nozzle includes an inlet section and an outlet section that are interconnected. The inner diameter of the inlet section decreases from the inlet end to the outlet end, and the inner diameter of the outlet section increases from the inlet end to the outlet end. The inner diameter of the outlet section at the outlet end is greater than the inner diameter of the inlet section at the inlet end.

[0021] Using the aforementioned technical solution, the constriction design of the inlet section creates negative pressure through the Venturi effect, which is equivalent to a "suction effect" between the second fluid channel and the nozzle. This passively absorbs more water flow, and combined with the active drive of the propulsion component (such as an annular impeller), further increases the water flow rate in the second fluid channel and the velocity entering the nozzle. The diffusion design of the outlet section converts the kinetic energy (high speed) of the water flow into pressure energy (high pressure) through the Venturi effect, allowing the ejected water flow to push the water flow in the first fluid channel with stable pressure, avoiding thrust fluctuations caused by sudden drops in flow velocity, and ensuring the continuity and stability of the fish suction process. The nozzle's structural design fully utilizes the principle of the Venturi tube, achieving the dual effect of "negative pressure water suction + pressure energy conversion" through a constriction-diffusion flow channel. This not only improves the fish suction efficiency and energy utilization of the pump, but also reduces harm to the fish through angle optimization.

[0022] Furthermore, the cone angle of the inlet section is 12° to 16°, and the cone angle of the outlet section is 24° to 28°.

[0023] Specifically, such as Figure 5 As shown, the cone angle of the inlet section 36 is ∠α, and the cone angle of the outlet section 37 is ∠β.

[0024] A water pump further includes an outer shell fitted outside an inner shell, the inner shell and the outer shell being fixed together, and a second fluid channel being formed between the outer shell and the outer shell, the second fluid channel having a second water inlet;

[0025] The propulsion component is installed in the second fluid channel and is used to push the water in the second fluid channel from the second inlet to the nozzle and spray it into the first fluid channel from the nozzle.

[0026] A drive assembly, which drives the propulsion component, is mounted on the housing.

[0027] Using the aforementioned technical solution, the dual fluid channels adopt a coaxial nested design (the inner shell is circular and the outer shell is annular). Although the overall radial dimension is slightly larger than that of a traditional single-channel pump, it reduces the need for external water supply devices, achieving integrated improvement of the pump and significantly reducing the space occupied by the pump, making it particularly suitable for space-constrained operating environments.

[0028] Furthermore, the second water inlet is located on the outer casing, and the second water inlet is connected to an external water source via a water pipe.

[0029] Using the aforementioned technical solution, the second fluid channel can be injected with clean water (such as an external clean water pipe). When the first fluid channel sucks in impurities such as mud, sand, and aquatic plants, clean dynamic water can be sprayed in through the spray nozzle to create a flushing effect, preventing the accumulation and blockage of mud and sand in the first fluid channel. Attached Figure Description

[0030] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0031] Figure 1 This is a schematic diagram of a water pump according to this application;

[0032] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0033] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0034] Figure 4 This is a full sectional view of the pump casing;

[0035] Figure 5 This is a full sectional view of the water spray pipe;

[0036] Figure 6 This is a schematic diagram of two embodiments of the filter screen.

[0037] Figure descriptions: 1. Pump casing; 2. Inner casing; 21. First fluid channel; 22. First inlet; 23. First outlet; 24. Inlet pipe; 25. Outer pipe; 3. Outer casing; 31. Second fluid channel; 32. Second inlet; 33. Spray nozzle; 34. Filter screen; 35. Spray pipe; 36. Inlet section; 37. Outlet section; 38. Inlet end; 39. Outlet end; 4. Propulsion component; 41. Annular impeller; 42. Blade; 5. Drive assembly; 6. Connecting assembly; 7. Guide component. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0039] The terms "first," "second," etc. (if present) in the specification and claims of this application are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this application, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this application, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0040] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0041] like Figures 1 to 6 As shown, this application provides a nozzle assembly for a water pump, including an inner shell 2 with a first fluid channel 21 on its inner side. The first fluid channel 21 has a first inlet 22 and a first outlet 23. The inner shell 2 is provided with a plurality of nozzles 33. The nozzles 33 are inclined relative to the radial direction of the inner shell 2 toward the first outlet 23, so that the water flow injected into the first fluid channel 21 by the nozzles 33 is inclined toward the first outlet 23.

[0042] The above scheme alters the water flow direction by using an inclined nozzle 33 to create a high-speed jet with a specific flow direction. Its core principle is as follows: the nozzle 33 is inclined radially towards the first outlet 23 along the inner shell 2, causing the ejected water to have an axial velocity component (pointing towards the first outlet 23) when entering the first fluid channel 21. This axial velocity component generates a directional thrust, propelling the water flow towards the outlet and strengthening the overall axial flow tendency of the fluid. When the inclined water flow mixes with the existing water flow within the first fluid channel 21, it increases the overall kinetic energy of the fluid through momentum transfer. On one hand, the high-speed jet accelerates the surrounding water, creating a stronger negative pressure suction (similar to the Venturi effect), improving fish-attracting efficiency; on the other hand, the axially inclined water flow reduces turbulence and energy loss within the channel, concentrating energy to propel the water flow towards the outlet.

[0043] Traditional impeller pumps rely on high-speed rotating blades 42 to generate suction, which can easily injure fish due to collisions and shearing forces. By adopting the above-mentioned technical solution, this application has the following advantages: Through an impeller-less fluid drive method, fish are drawn in using gentle negative pressure, and the water flows smoothly along the axial direction, avoiding direct mechanical damage to the fish from the blades 42. The inclined water flow creates a more uniform flow field, further reducing the impact and compression on the fish during the suction process.

[0044] Furthermore, multiple nozzles 33 are circumferentially distributed along the axis of the inner shell 2 and form a nozzle group; the extension lines of the axes of the nozzles 33 in the same nozzle group intersect at the same position on the center line of the first fluid channel 21, which is the water flow convergence point of the nozzle group.

[0045] By adopting the aforementioned technical solution, by converging the extended axes of the nozzles 33 of the same group of nozzles at the same water flow confluence point on the center line of the first fluid channel 21, a ring-shaped converging jet structure is formed. In this structure, multiple water flows form a centripetally converging high-speed jet at the confluence point. When the multiple water flows collide with each other, a relatively vacuum area is generated, similar to the "water hammer effect". A stronger local negative pressure is generated in this area, which significantly improves the ability to inhale fish (or fluids).

[0046] Specifically, the number of nozzles 33 is 54, the spray speed is 20m / s, and it can reduce the liquid flow rate at both ends from 0.00085m³ / h. 3 / s magnified to 0.125m 3 / s (7500L / min), with a magnification of 147 times. The outlet shape of the nozzle 33 is cylindrical (1mm) + trumpet-shaped (2mm, diffusion angle 26.6°), distributed in a 9×6 matrix with a spacing of 70.9mm×6.7mm.

[0047] Furthermore, several sets of nozzle groups are arranged at intervals along the axial direction of the first fluid channel 21, and the water flow confluence points of the several sets of nozzle groups are arranged at intervals along the flow direction of the fluid in the first fluid channel 21 according to the arrangement order of the corresponding nozzle groups.

[0048] Using the aforementioned technical solution, the confluence point of the upstream nozzle group (near the inlet) is located upstream of the fluid, first forming a primary negative pressure zone near the suction inlet, attracting fish and water from afar to move towards the pump body; the confluence point of the downstream nozzle group moves downstream in sequence, forming a secondary / tertiary negative pressure zone in the middle of the fluid channel or near the outlet, producing a secondary acceleration effect on the already sucked fluid and fish. Furthermore, due to the "water hammer effect," the multi-stage nozzle group can form a long-distance negative pressure gradient zone in the direction of the pump body axis, making the negative pressure area larger and forming an adsorption area with a wider influence range, increasing the pump's ability to suck in fish (or fluid).

[0049] Specifically, the confluence point of the water flow of the upstream nozzle group is located upstream of the confluence point of the water flow of the downstream nozzle group.

[0050] Furthermore, the water outlet 39 of the spray nozzle 33 is flush with the inner wall of the first fluid channel 21; or, the end face of the water outlet 39 of the spray pipe 35 is perpendicular to the axial direction of the spray nozzle 33.

[0051] By adopting the aforementioned technical solution, the water outlet 39 is flush with the inner wall, which can prevent the water nozzle 33 from protruding and forming a "step" or "protrusion", reducing turbulence and energy loss when the fluid flows through, and making the mainstream fluid (such as the working medium in the pump) flow more smoothly.

[0052] The end face of the water outlet 39 is perpendicular to the axis of the nozzle 33, and the spray direction is strictly axial (such as spraying towards the pump outlet). The spray angle is fixed and concentrated, which can increase the pumping kinetic energy of the pump body and is beneficial to increasing the pumping and fish suction efficiency of the pump body.

[0053] Furthermore, the water nozzle 33 includes an inlet section 36 and an outlet section 37 that are interconnected. The inner diameter of the inlet section 36 decreases from the inlet end 38 to the outlet end 39, and the inner diameter of the outlet section 37 increases from the inlet end 38 to the outlet end 39. Moreover, the inner diameter of the outlet section 37 at the outlet end 39 is greater than the inner diameter of the inlet section 36 at the inlet end 38.

[0054] Using the aforementioned technical solution, the contraction design of the inlet section 36 creates negative pressure through the Venturi effect, which is equivalent to generating a "suction effect" between the second fluid channel 31 and the nozzle 33. This passively absorbs more water flow, and with the active drive of the propulsion component 4 (such as the annular impeller 41), it further increases the water flow rate in the second fluid channel 31 and the velocity entering the nozzle 33. The diffusion design of the outlet section 37 converts the kinetic energy (high speed) of the water flow into pressure energy (high pressure) through the Venturi effect, so that the ejected water flow pushes the water flow in the first fluid channel 21 with stable pressure, avoiding thrust fluctuations caused by a sudden drop in flow velocity, and ensuring the continuity and stability of the fish suction process. The structural design of the nozzle 33 fully utilizes the principle of the Venturi tube, achieving the dual effect of "negative pressure water suction + pressure energy conversion" through a contraction-diffusion flow channel. This not only improves the fish suction efficiency and energy utilization of the pump, but also reduces harm to the fish through angle optimization.

[0055] Furthermore, the cone angle of the inlet section 36 is 12° to 16°, and the cone angle of the outlet section 37 is 24° to 28°.

[0056] Specifically, such as Figure 5 As shown, the cone angle of the inlet section 36 is ∠α, and the cone angle of the outlet section 37 is ∠β.

[0057] Furthermore, a plurality of water spray pipes 35 are installed on the inner shell 2, and the water spray nozzles 33 are located in the corresponding water spray pipes 35; the water spray pipes 35 protrude from the inner wall of the first fluid channel 21 and are inclined relative to the radial direction of the inner shell 2 towards the first water outlet 23, and the part of the water spray pipes 35 protruding from the first fluid channel 21 has a streamlined structure.

[0058] By adopting the aforementioned technical solution, an inclined water spray pipe 35 is installed on the inner shell 2, and the water spray nozzle 33 is integrated inside the water spray pipe 35. This enhances the axial flow velocity of the guided water flow. The water spray pipe 35 maintains a laminar flow state before the water is sprayed out through a built-in flow guide channel, avoiding jet dispersion caused by turbulence on the inner shell 2 wall. If a traditional nozzle protrudes directly from the inner wall to form a right-angle step, a separation vortex is easily formed behind the protrusion when high-speed water flows through it, resulting in: increased local pressure drop (energy waste); and the vortex generating additional impact on the fish body (such as rotational torque causing the fish to flip over). However, the streamlined structure of this application (such as an elliptical arc surface or a hyperboloid surface) allows the water flow to smoothly bypass the protruding part, and the separation point moves backward or disappears, thereby reducing the frictional resistance of the wall surface; and avoiding collisions between the fish body and the protruding structure (such as the sharp edges of the water spray pipe 35 scratching the fish fins).

[0059] Understandably, in another embodiment, the nozzle 33 is a through hole on the side wall of the inner tube, which is inclined to the axis of the inner tube and the outlet faces the first outlet 23. In this embodiment, the nozzle 33 is also provided with a guide component 7 located at the inlet end 38 and the outlet end 39 of the nozzle 33, so that the water flow can be smoothly guided into the nozzle 33 and sprayed towards the first outlet 23. Specifically, the guide component 7 can be a semi-enclosed structure, with the inlet end 38 located on the side away from the propulsion member 4, so that the water flow is guided into the nozzle 33 by the guide component 7; and the outlet end 39 located on the side away from the first outlet 23, so that the water flow can be directly guided to the first outlet 23, avoiding flow in other directions.

[0060] Furthermore, the water spray pipe 35 is threaded or welded to the inner shell 2.

[0061] Using the aforementioned technical solution, threaded connections allow for tool-free, quick disassembly of the water spray pipe 35 (e.g., by hand-tightening threads or quick-release nuts). When the water spray pipe 35 is internally blocked or worn, operators can replace a single water spray pipe 35 in a short time, significantly improving maintenance efficiency. Welding creates a permanent metallurgical bond, reducing the risk of leakage at the interface to near zero. Compared to threaded connections that rely on sealing rings (which may leak due to aging or improper installation), welded structures are more reliable under high-pressure conditions.

[0062] A type of water pump, such as Figure 1 As shown, this application includes a pump housing 1, which includes an inner shell 2 and an outer shell 3 fitted over the outer side of the inner shell 2. The inner shell 2 and the outer shell 3 are fixed together. A first fluid channel 21 is provided on the inner side of the inner shell 2. The first fluid channel 21 has a first inlet 22 and a first outlet 23. A second fluid channel 31 is formed between the outer side of the inner shell 2 and the outer shell 3. The second fluid channel 31 has a second inlet 32. The second inlet 32 ​​is located on the inner shell 2 and communicates with the first fluid channel 21. A filter screen 34 is installed on the second inlet 32. The inner shell 2 is provided with a connection between the first fluid channel 21 and the second fluid channel 31. The body channel 31 has a water nozzle 33, which is inclined relative to the inner shell 2 towards the first outlet 23 so that the water flow injected into the first fluid channel 21 by the water nozzle 33 is inclined towards the first outlet 23. The second inlet 32 ​​is located upstream of the water nozzle 33. The propulsion member 4 is installed in the second fluid channel 31 and is used to push the water flow in the second fluid channel 31 from the second inlet 32 ​​towards the water nozzle 33 and spray it into the first fluid channel 21 from the water nozzle 33. The drive assembly 5 is used to drive the propulsion member 4 and is installed in the outer shell 3.

[0063] The pump principle of this application is as follows: Water enters from the first inlet 22, and is then drawn in through the second inlet 32 ​​(located in the inner shell 2, connected to the first fluid channel 21). After being driven by the propulsion component 4 (such as an impeller, propeller, etc.), it is sprayed at high speed into the first fluid channel 21 from the nozzle 33. The first fluid channel 21 can be regarded as the core area of ​​the unpowered pumping, and its pumping power mainly relies on the assistance of the water flow in the second fluid channel 31. The nozzle 33 is inclined relative to the radial direction of the inner shell 2 towards the first outlet 23. When the water in the second fluid channel 31 is sprayed out at high speed from the nozzle 33 under the action of the propulsion component 4, a negative pressure area is formed at the outlet end. This negative pressure area will drive the liquid upstream of the outlet end of the nozzle 33 to flow downstream. Due to the existence of the inclination angle, the water flow is no longer sprayed vertically or randomly into the first fluid channel 21, but generates an oblique thrust along the first fluid channel 21 towards the first outlet 23. This thrust can also accelerate the flow of water within the first fluid channel 21, creating a "booster" effect. Therefore, the water can flow out of the first outlet 23 along the inclined direction of the nozzle 33.

[0064] Specifically, the inner diameter of the first fluid channel 21 ranges from 50 to 250 mm, preferably 203.2 mm, and is equipped with a modular flange to accommodate various pipe types. The inner shell 2 is made of 304 stainless steel, with an inner diameter of 203.2 mm, an outer diameter of 233.2 mm, a height of 40 mm, and a sandwich thickness of 15 mm, and is equipped with a modular flange (suitable for 50-250 mm pipes).

[0065] Understandably, the mesh diameter of the filter screen 34 is smaller than that of the fish fry. The pump is mainly used for transporting coarsely dispersed two-phase mixtures and for the non-destructive transport of sensitive goods, such as transporting fluid materials like water, as well as aquatic products like fish, shrimp, and crabs. It can also transport liquids containing solid particles.

[0066] Furthermore, the propulsion component 4 includes an annular impeller 41 and blades 42 disposed on the annular impeller 41. The annular impeller 41 is sleeved on the outside of the inner tube and can rotate relative to the inner tube.

[0067] Using the aforementioned technical solution, the annular impeller 41 is fitted on the outside of the inner tube, which is highly compatible with the double-layer fluid channel structure formed by the inner shell 2 and the outer shell 3, making full use of the annular space of the second fluid channel 31 and making the structure more compact.

[0068] Specifically, the annular impeller 41 is placed in the interlayer between the inner shell 2 and the outer shell 3. The second fluid channel 31 has a small diameter of 205.2 mm and an outer diameter of 229.2 mm, and is equipped with twelve reinforcing ribs and four heavy-duty bearings (with a load capacity of 8000 N). The annular impeller is made of PA66-GF30 material, with a hollow diameter of 205.2 mm and an outer diameter of 229.2 mm. It contains 12 blades (8 mm high, with an angle of 30°-45°), 12 reinforcing ribs (2×5×20 mm), and four 61944 bearings (single bearing dynamic load 2000 N, total load capacity 8000 N).

[0069] Understandably, the annular impeller 41 is rotatably connected to the inner or outer tube via a bearing; a support ring is provided between the annular impeller 41 and the inner tube, a fixing ring is sealed and fixed on the outer tube, and a sealing ring is provided between the annular impeller 41 and the fixing ring; the annular impeller 41 and the fixing ring are rotatably connected via a bearing; the drive assembly 5 drives the annular impeller 41 to rotate via a belt drive assembly; or, the drive assembly 5 drives the annular impeller 41 to rotate via a gear drive assembly. The gear drive assembly is driven by a 2.2kW motor via an HTD5M-400-15 synchronous belt (15mm wide) to rotate the annular impeller 41.

[0070] Furthermore, it also includes an inlet pipe 24 and an outlet pipe 25. The inlet pipe 24 is fixed to the pump housing 1 and communicates with the first inlet 22. The outlet pipe 25 is fixed to the pump housing 1 and communicates with the first outlet 23. The end of the inlet pipe 24 away from the first inlet 22 is provided with a connecting component 6, and the end of the outlet pipe 25 away from the first outlet 23 is provided with a connecting component 6.

[0071] Using the aforementioned technical solution, the inlet pipe 24 is fixedly connected to the first inlet 22, and the outlet pipe 25 is fixedly connected to the first outlet 23, ensuring the sealing of the water flow path and reducing leakage or air intake problems caused by loose interfaces, thus avoiding affecting the formation of negative pressure in the pump body and the pumping efficiency. The pipeline structure can guide the water flow smoothly into the first fluid channel 21 (inlet pipe 24) and out of the pump body (outlet pipe 25). Combined with the oblique thrust design of the spray nozzle 33 inside the pump casing 1, it further reduces turbulence and energy loss at the inlet and outlet, improving the overall stability of fluid transmission. The setting of the connecting components 6 (such as flanges, quick couplings, and other standardized interfaces) can be adapted to different specifications of water sources (such as fish ponds, reservoirs) or target containers (such as transport tanks, temporary holding tanks), and is compatible with existing pipeline systems, improving the versatility of the equipment and the flexibility of applicable scenarios.

[0072] The technical advantages of the above solution are:

[0073] Ultra-large flow rate: The flow rate is increased by 147 times, reaching 7500L / min, which meets the needs of large-scale circulating water.

[0074] Multi-diameter compatibility: Compatible with 50-250mm pipes, modular flanges facilitate installation.

[0075] High efficiency and durability: system efficiency 83.3%, impeller life >20,000 hours.

[0076] Fish protection: Large fish pass rate >99%, small fish interception rate >99%, no fish damage.

[0077] High versatility: suitable for aquaculture, industrial circulating water, and agricultural irrigation.

[0078] Based on the above design, the performance parameters of this water pump are: Flow rate: 7500 L / min (0.125 m³ / min). 3 / s). Head: 12m. Suction head: 3m. System efficiency: 83.3%. Interlayer pressure: 1,447,000Pa. Jet velocity at nozzle 33: 20m / s.

[0079] Furthermore, the extension direction of the filter screen 34 is parallel to the flow direction of the fluid in the first fluid channel 21; the filter screen 34 is provided to protrude from the inner wall of the first fluid channel 21.

[0080] Using the aforementioned technical solution, the extension direction of the filter screen 34 is parallel to the water flow direction within the first fluid channel 21, allowing the water to flow smoothly along the surface of the filter screen 34 and reducing impurity retention caused by vertical interception. Even if debris (such as aquatic plants or silt) adheres to the filter screen 34, the high-speed water flow can "wash it away" through shearing force, significantly reducing the risk of clogging, especially suitable for turbid water or waters containing impurities (such as when there is a lot of bottom mud in fishponds). The filter screen 34 protrudes from the inner wall of the first fluid channel 21, forming a "buffer zone," so that when fish move with the water flow, they first contact the filter screen 34 rather than directly impacting the pump casing 1 or other rigid components, reducing collision damage. The edges of the protruding parts are rounded (such as rounded chamfers) to avoid sharp edges scratching the fish's body (especially the delicate scales of fry), further reducing the risk of mechanical injury.

[0081] Specifically, the water inlet direction of the second water inlet 32 ​​is perpendicular to the extension direction within the first fluid channel 21; the edge of the protruding part of the filter screen 34 is smoothly transitioned; the filter screen 34 can be made of soft materials, such as engineering plastics (PVC, PP, PE), nylon (PA), and polytetrafluoroethylene (PTFE, Teflon), or it can be made of softer metal materials, etc., to reduce harm to fish.

[0082] Understandably, in another embodiment, the filter surface of the filter screen 34 faces the first water inlet 22. When objects in the water move with the water flow, such as fish, they can collide with the filter screen 34, causing items that obstruct water entry to be knocked off and washed away to some extent by the water flow.

[0083] Furthermore, the minimum diameter of the spray nozzle 33 is d1, which is larger than the aperture of the filter screen 34 by d2, where d1 ≥ 2d2.

[0084] Using the aforementioned technical solution, if the minimum diameter (d1) of the spray nozzle 33 is smaller than or close to the aperture (d2) of the filter screen 34, impurities (such as particles and fibers) intercepted on the filter screen 34 may be drawn into the spray nozzle 33 with the water flow, causing channel blockage and affecting fluid transport efficiency or equipment operational stability. By limiting d1 to ≥ 2d2, it can be ensured that the flow cross-section of the spray nozzle 33 is always larger than the area of ​​a single aperture of the filter screen, allowing small particles of impurities to be discharged through the spray nozzle 33 after entering the filter screen. Furthermore, a larger diameter of the spray nozzle 33 can reduce water flow resistance and avoid problems such as increased turbulence or pressure drop caused by excessively small apertures.

[0085] Specifically, the first fluid channel 21 (203.2mm) can hold 1.2kg of fish, and the filter screen 34 has a pore size d2 of 0.5mm, which can intercept 0.2g of fish.

[0086] Furthermore, the filter screen 34 is detachably connected to the inner shell 2.

[0087] Using the aforementioned technical solution, in aquaculture environments, the filter screen 34 is easily clogged by impurities such as fish feces, aquatic plants, and algae. The detachable design allows users to directly remove the filter screen for rinsing or replacement without disassembling the entire pump body, significantly shortening maintenance time.

[0088] In another embodiment, the second water inlet 32 ​​is disposed on the outer casing 3, and the second water inlet 32 ​​is connected to an external water source through a water pipe.

[0089] Using the aforementioned technical solution, the second fluid channel 31 can be injected with clean water (such as an external clean water pipe). When the first fluid channel 21 sucks in impurities such as mud, sand, and aquatic plants, clean dynamic water can be sprayed in through the spray nozzle 33 to form a flushing effect, preventing the accumulation and blockage of mud and sand in the first fluid channel 21.

[0090] In addition to the preferred embodiments described above, this application has other implementation methods. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection claimed in this application.

Claims

1. A nozzle assembly for a water pump, characterized in that, The device includes an inner shell with a first fluid channel on its inner side. The first fluid channel has a first inlet and a first outlet. The inner shell is provided with a plurality of spray nozzles. The spray nozzles are inclined relative to the radial direction of the inner shell toward the first outlet, so that the water flow injected into the first fluid channel by the spray nozzles is inclined toward the first outlet.

2. The nozzle assembly for a water pump according to claim 1, characterized in that, Multiple nozzles are distributed circumferentially along the axis of the inner shell and form a nozzle group; the extension lines of the nozzle axes within the same nozzle group intersect at the same position in the first fluid channel, which is the water flow convergence point of the nozzle group.

3. A nozzle assembly for a water pump according to claim 2, characterized in that, Several sets of nozzles are arranged at intervals along the axial direction of the first fluid channel. The water flow confluence points of the several sets of nozzles are arranged at intervals along the flow direction of the fluid in the first fluid channel according to the arrangement order of the corresponding nozzle sets.

4. A nozzle assembly for a water pump according to claim 1, characterized in that, The inner shell is equipped with several water spray pipes, and the water spray nozzles are located in the corresponding water spray pipes; the water spray pipes protrude from the inner wall of the first fluid channel and are inclined towards the first water outlet relative to the radial direction of the inner shell, and the part of the water spray pipe protruding from the first fluid channel has a streamlined structure.

5. A nozzle assembly for a water pump according to claim 4, characterized in that, The water spray pipe is threaded or welded to the inner shell.

6. A nozzle assembly for a water pump according to claim 4, characterized in that, The water outlet end of the spray nozzle is flush with the inner wall of the first fluid channel; or, the end face of the water outlet end of the spray pipe is perpendicular to the axis of the spray nozzle.

7. A nozzle assembly for a water pump according to any one of claims 1 to 6, characterized in that, The spray nozzle includes an inlet section and an outlet section that are interconnected. The inner diameter of the inlet section decreases from the inlet end to the outlet end, and the inner diameter of the outlet section increases from the inlet end to the outlet end. The inner diameter of the outlet section at the outlet end is greater than the inner diameter of the inlet section at the inlet end.

8. A nozzle assembly for a water pump according to claim 7, characterized in that, The cone angle of the inlet section is 12° to 16°, and the cone angle of the outlet section is 24° to 28°.

9. A water pump, characterized in that, The nozzle assembly, including any one of claims 1 to 8, further includes an outer shell sleeved on the outside of the inner shell, the inner shell and the outer shell being fixed together, and a second fluid channel being formed between the outer shell and the outer shell, the second fluid channel having a second inlet; a propulsion member installed in the second fluid channel for propelling water flow in the second fluid channel from the second inlet to the nozzle and spraying it into the first fluid channel from the nozzle; and a drive assembly for driving the propulsion member, the drive assembly being installed in the outer shell.

10. A water pump according to claim 9, characterized in that, The second water inlet is located on the outer casing, and the second water inlet is connected to an external water source via a water pipe.

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