Double-impeller backflow-preventing water pumping device

Abstract

The utility model relates to a kind of double-impeller anti-backflow water pumping device, including seat, first impeller, second impeller, first driving device and second driving device, the top of the seat is opened with upper cavity, the first impeller is arranged in rotation mode in upper cavity and is located the left side of upper cavity, the second impeller is arranged in rotation mode in upper cavity and is located the left side of upper cavity;The seat is opened with water channel along its height direction, the water channel is located between first impeller and second impeller, the upper end of the water channel is located in upper cavity and forms water inlet, the lower end of the water channel extends out of seat and forms drain outlet;When normal operation, any impeller can independently drive water flow through water inlet, water channel discharge, to ensure pumping efficiency;When one of driving device fails, another impeller can still work normally, ensure pumping function uninterrupted.

Description

Technical Field

[0001] This utility model relates to a double-impeller anti-backflow pumping device. Background Technology

[0002] In the existing technology, common dual-impeller anti-backflow pumping devices mostly adopt a single impeller or dual-impeller independent drive structure, and realize the pumping function through their respective drain outlets to improve pumping efficiency.

[0003] However, this type of device has certain drawbacks: When one of the drive units fails and the corresponding impeller stops rotating, although the other impeller can still drain water independently, the presence of multiple drain outlets can easily cause the water in the aquarium or water storage device to flow backward through the non-working side drain outlet. Utility Model Content

[0004] The purpose of this utility model is to provide a double impeller anti-backflow pumping device that can independently pump water with either a single impeller or a double impeller, and effectively prevent backflow when the machine is stopped.

[0005] The purpose of this utility model is achieved as follows: A double-impeller anti-backflow pumping device includes a base, a first impeller, a second impeller, a first drive device, and a second drive device. The top of the base has an upper cavity. The first impeller is rotatably disposed in the upper cavity and located on the left side of the upper cavity. The second impeller is rotatably disposed in the upper cavity and located on the left side of the upper cavity. The base has a water channel along its height direction. The water channel is located between the first impeller and the second impeller. The upper port of the water channel is located in the upper cavity to form a water inlet, and the lower port of the water channel extends out of the base to form a water outlet. A first water inlet is formed between the first impeller and the water inlet, and a first swing arm is provided at the first water inlet. The first swing arm is used to control the opening or closing of the first water inlet. A second water inlet is formed between the second impeller and the water inlet. A second swing arm is provided at the second water inlet. The second swing arm is used to control the opening or closing of the second water inlet. The first drive device is installed in the housing and connected to the first impeller, and the first drive device drives the first impeller to rotate; The second drive device is installed inside the housing and connected to the first impeller. The first drive device drives the second impeller to rotate.

[0006] During normal operation, either impeller can independently drive the water flow through the inlet and water channel to ensure pumping efficiency. When one drive unit fails, the other impeller can still work normally, ensuring uninterrupted pumping. When both impellers stop working, the reverse water flow will automatically push the corresponding swing arm to close the corresponding water outlet, effectively preventing backflow. In addition, this structure has only one drain outlet, which simplifies the internal flow channel design and improves overall reliability and service life. It is particularly suitable for pumping scenarios such as aquariums that require stable backflow prevention.

[0007] The objective of this utility model can also be achieved by the following technical measures: Furthermore, the first driving device includes a stator and a rotor, the base is provided with a rotor receiving cavity, the rotor is disposed in the rotor receiving cavity, the stator is disposed in the base and located outside the rotor receiving cavity, the rotor rotates by magnetic field coupling, and the structure of the second driving device is the same as that of the first driving device. The first impeller is connected to the rotor of the first drive device, and the first impeller rotates with the rotor; The second impeller is connected to the rotor of the second drive device, and the second impeller rotates with the rotor.

[0008] By utilizing magnetic force to transmit torque, the sealing problems inherent in traditional through-shell motor structures are avoided, effectively preventing water from seeping into the drive chamber and causing motor damage or short circuits, thus significantly improving the device's waterproof performance and safety. Simultaneously, this magnetic coupling structure requires no lubricating oil, resulting in low operating noise, low energy consumption, and easy maintenance. The two drive units have identical structures and a high degree of modularity, facilitating mass production and replacement. The overall design gives the dual-impeller anti-backflow pumping device advantages such as high sealing performance, high reliability, and long lifespan, making it particularly suitable for use in environments requiring protection against leakage and corrosion, such as aquariums and submersible pumps.

[0009] Furthermore, it also includes a limiting plate, which is provided with a first cover cavity, a second cover cavity and a third cover cavity, wherein the first cover cavity has a first opening, the second cover cavity has a second opening, and the third cover cavity is located between the first cover cavity and the second cover cavity; The first shroud cavity and the third shroud cavity are connected, and the connection between the first shroud cavity and the third shroud cavity forms the first water inlet; The second shroud cavity and the third shroud cavity are connected, and the connection between the second shroud cavity and the third shroud cavity forms the second water inlet; The limiting plate sits on the top of the seat, the first impeller enters the first cover cavity, the second impeller enters the second cover cavity, and the water inlet, the first swing arm and the second swing arm are all placed in the third cover cavity.

[0010] By setting a first, second, and third shroud on the limiting plate, the two sets of impellers and the water flow channel form independent yet coordinated working spaces, which is beneficial for guiding the water flow direction and precisely controlling the opening and closing of the inlet. The structure of the limiting plate effectively restricts the impeller's operating position, preventing the impeller from deviating or interfering during high-speed rotation, thereby improving the stability and reliability of pumping. In addition, the swing arm and inlet are centrally arranged in the third shroud, which is compact in structure and easy to install, and helps to achieve efficient cooperation between automatic opening and closing and anti-backflow functions.

[0011] Furthermore, it also includes a top cover, which is detachably mounted on the top of the base, with the limiting plate located inside the top cover, and the top cover having water inlet holes spaced apart.

[0012] The detachable design of the top cover facilitates maintenance, cleaning, or replacement of internal components, while also enhancing assembly flexibility. A limiting plate inside the top cover creates a stable mounting cavity, ensuring precise positioning of internal components. The water inlet design of the top cover guarantees even water flow into the system, improving water intake efficiency and the overall pumping performance of the device, while preventing impurities from entering the internal structure and extending the device's lifespan.

[0013] The beneficial effects of this utility model are as follows: This invention achieves coordinated pumping by setting two independently driven impellers in the same body and adopting a shared single drainage channel design. This not only improves pumping efficiency and water output, but also avoids the risks of water flow turbulence and backflow in the traditional dual-drainage outlet structure, making the device operate more efficiently and stably.

[0014] This invention introduces an automatic opening and closing structure for the first and second swing arms, enabling the water inlets to automatically open or close according to the water flow direction under different impeller operating states. When any set of impellers stops running, the other set can still pump water independently, while the inactive water path is automatically closed, ensuring that the system still has reliable unilateral pumping capability in the event of a partial failure.

[0015] This invention employs a stator-rotor magnetic field coupling drive structure, eliminating the sealing problem of traditional motor shaft penetration into the housing, achieving contactless transmission, and possessing excellent waterproof, leakage-proof performance and low noise characteristics. This design not only extends the service life of the equipment but also improves its safety and stability in humid environments such as aquariums and submersible pumps. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a double-impeller anti-backflow pumping device.

[0017] Figure 2 This is another schematic diagram of the double impeller anti-backflow pumping device.

[0018] Figure 3 This is a top view of a double-impeller anti-backflow pumping device.

[0019] Figure 4 This is a cross-sectional view of a double-impeller anti-backflow pumping device.

[0020] Figure 5 This is a cross-sectional view of the double-impeller anti-backflow pumping device from another angle.

[0021] Figure 6 This is an exploded view of a double-impeller anti-backflow pumping device.

[0022] Figure 7 This is an exploded view of the double-impeller anti-backflow pumping device from another angle.

[0023] Figure 8 This is a schematic diagram of a double-impeller anti-backflow pumping device (excluding the top cover and the limiting plate).

[0024] Figure 9 This is an assembly drawing of the rotor and rotor housing cavity for a double-impeller anti-backflow pumping device.

[0025] Figure 10 This is a schematic diagram showing that both the first and second impellers have stopped rotating.

[0026] Figure 11 This is a schematic diagram showing that both the first and second impellers are rotating.

[0027] Figure 12 This is a schematic diagram showing the first impeller rotating while the second impeller stops rotating.

[0028] Figure 13 This is a schematic diagram showing the second impeller rotating while the first impeller stops rotating. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 13 As shown, a double impeller anti-backflow pumping device includes a base 1, a first impeller 2, a second impeller 3, a first drive device 4, and a second drive device 5. The top of the base 1 has an upper cavity 11. The first impeller 2 is rotatably disposed in the upper cavity 11 and located on the left side of the upper cavity 11. The second impeller 3 is rotatably disposed in the upper cavity 11 and located on the left side of the upper cavity 11. The base 1 has a water channel 6 along its height direction. The water channel 6 is located between the first impeller 2 and the second impeller 3. The upper port of the water channel 6 is located inside the upper cavity 11 to form a water inlet 61, and the lower port of the water channel 6 extends out of the base 1 to form a drain outlet 62. A first water inlet 21 is formed between the first impeller 2 and the water inlet 61. A first swing arm 7 is provided at the first water inlet 21. The first swing arm 7 is used to control the opening or closing of the first water inlet 21. A second water inlet 31 is formed between the second impeller 3 and the water inlet 61. A second swing arm 8 is provided at the second water inlet 31. The second swing arm 8 is used to control the opening or closing of the second water inlet 31. The first drive device 4 is installed inside the base 1 and connected to the first impeller 2. The first drive device 4 drives the first impeller 2 to rotate. The second drive device 5 is installed inside the base 1 and connected to the first impeller 2. The first drive device 4 drives the second impeller 3 to rotate.

[0030] Furthermore, the first driving device 4 includes a stator 41 and a rotor 42. The base 1 is provided with a rotor receiving cavity 12. The rotor 42 is disposed in the rotor receiving cavity 12. The stator 41 is disposed in the base 1 and located outside the rotor receiving cavity 12. The rotor 42 rotates by magnetic field coupling. The structure of the second driving device 5 is the same as that of the first driving device 4. The first impeller 2 is connected to the rotor 42 of the first drive device 4, and the first impeller 2 rotates with the rotor 42; The second impeller 3 is connected to the rotor 42 of the second drive device 5, and the second impeller 3 rotates with the rotor 42.

[0031] Furthermore, it also includes a limiting plate 9, which is provided with a first cover cavity 91, a second cover cavity 92 and a third cover cavity 93. The first cover cavity 91 has a first opening 911, the second cover cavity 92 has a second opening 921, and the third cover cavity 93 is located between the first cover cavity 91 and the second cover cavity 92. The first cover cavity 91 and the third cover cavity 93 are connected, and the connection between the first cover cavity 91 and the third cover cavity 93 forms the first water outlet 21; The second cover cavity 92 and the third cover cavity 93 are connected, and the connection between the second cover cavity 92 and the third cover cavity 93 forms the second water outlet 31; The limiting plate 9 sits on the top of the seat 1, the first impeller 2 enters the first cover cavity 91, the second impeller 3 enters the second cover cavity 92, and the water inlet 61, the first swing arm 7 and the second swing arm 8 are all placed in the third cover cavity 93.

[0032] Furthermore, it also includes an upper cover 10, which is detachably disposed on the top of the base 1, the limiting plate 9 is located inside the upper cover 10, and the upper cover 10 is spaced apart by water inlet holes 101.

[0033] The pumping principle of two impellers rotating simultaneously: When the first drive device 4 and the second drive device 5 are started simultaneously, the first impeller 2 and the second impeller 3 rotate synchronously, forming stable negative pressure zones in their respective cavities. Water enters through the inlet hole 101 of the upper cover 10 and flows to the corresponding first opening 911 and second opening 921. Part of the water is drawn in by the first impeller 2 through the first opening 911, pushing the first swing arm 7 to open the first water inlet 21. The water then flows sequentially through the first water inlet 21, the third cavity 93, the inlet 61, and the water channel 6, finally being discharged through the drain outlet 62. The other part of the water is drawn in by the second impeller 3 through the second opening 921, pushing the second swing arm 8 to open the second water inlet 31. The water then flows sequentially through the second water inlet 31, the third cavity 93, the inlet 61, and the water channel 6, finally being discharged through the drain outlet 62. At this time, both the first swing arm 7 and the second swing arm 8 are in the open state under the action of the water flow, and the first water inlet 21 and the second water inlet 31 are simultaneously connected, forming a dual-channel coordinated pumping mode. In this mode, the two sets of impellers work together, making water delivery more efficient and stable, significantly improving the overall pumping efficiency and output, and making the water flow distribution more balanced and the pressure more stable.

[0034] The pumping and backflow prevention principle when the first impeller 2 is rotating and the second impeller 3 is not rotating: When the first drive unit 4 is working normally and the second drive unit 5 malfunctions, causing the second impeller 3 to stop rotating, the first impeller 2 rotates within the first shroud 91, forming a stable negative pressure zone. Water enters through the inlet hole 101 of the upper cover 10, and some water is drawn into the first impeller 2 through the first opening 911, pushing the first swing arm 7 to open the first water inlet 21. The water flows sequentially through the first water inlet 21, the third shroud 93, the inlet 61, and the water channel 6, finally being discharged through the outlet 62. Since the second impeller 3 stops operating, no suction is formed within the second shroud 92. The change in water flow direction causes the second swing arm 8 to automatically close under water pressure, and the second water inlet 31 is closed, effectively preventing backflow of water from the direction of the second water inlet 31. At this time, the device can rely solely on the first impeller 2 to achieve the pumping function, ensuring normal drainage while simultaneously preventing reverse seepage from the non-working side water path.

[0035] The pumping and backflow prevention principle when the first impeller 2 stops rotating and the second impeller 3 rotates: When the first drive unit 4 stops working, causing the second impeller 3 to stop rotating, and the second drive unit 5 operates normally, the second impeller 3 rotates within the second shroud 92, creating a negative pressure zone. Water enters through the inlet 101 of the upper cover 10, and some water is drawn into the second impeller 3 through the second opening 921, pushing the second swing arm 8 to open the second water inlet 31. The water flows sequentially through the second water inlet 31, the third shroud 93, the inlet 61, and the water channel 6, finally being discharged through the outlet 62. At this time, because the first impeller 2 does not rotate, the water flow direction within the first shroud 91 is reversed, causing the first swing arm 7 to automatically close the first water inlet 21 under reverse water pressure, preventing water from flowing back into the first shroud 91. Thus, even with only one impeller operating, the device can still maintain normal pumping operation and achieve automatic closure and backflow prevention protection on the other side of the water path.

[0036] The principle of preventing backflow when both the first impeller 2 and the second impeller 3 stop rotating: When both the first drive unit 4 and the second drive unit 5 are in the off state, a negative pressure zone is no longer formed inside the double impeller anti-backflow pumping device, and external water may flow backward through the drain outlet 62. At this time, the reverse water flow acts on the first swing arm 7 and the second swing arm 8 at the inlet 61 along the water channel 6, causing them to automatically swing in the closing direction under water pressure, thus sealing the first water outlet 21 and the second water outlet 31 respectively. Through this self-closing structure design with the double swing arms linked, water can be simultaneously blocked from entering the first cover cavity 91 and the second cover cavity 92, effectively preventing water in the fish tank or water storage container from flowing back through the drain outlet 62.

Claims

1. A double-impeller anti-backflow pumping device, comprising a base (1), a first impeller (2), a second impeller (3), a first drive device (4), and a second drive device (5), characterized in that: The top of the seat (1) has an upper cavity (11), the first impeller (2) is rotatably disposed in the upper cavity (11) and located on the left side of the upper cavity (11), and the second impeller (3) is rotatably disposed in the upper cavity (11) and located on the left side of the upper cavity (11); The base (1) has a water channel (6) along its height direction. The water channel (6) is located between the first impeller (2) and the second impeller (3). The upper port of the water channel (6) is located in the upper cavity (11) to form a water inlet (61). The lower port of the water channel (6) extends out of the base (1) to form a drain outlet (62). A first water inlet (21) is formed between the first impeller (2) and the water inlet (61). A first swing arm (7) is provided at the first water inlet (21). The first swing arm (7) is used to control the opening or closing of the first water inlet (21). A second water inlet (31) is formed between the second impeller (3) and the water inlet (61). A second swing arm (8) is provided at the second water inlet (31). The second swing arm (8) is used to control the opening or closing of the second water inlet (31). The first drive device (4) is installed inside the base (1) and connected to the first impeller (2). The first drive device (4) drives the first impeller (2) to rotate. The second drive device (5) is installed inside the base (1) and connected to the first impeller (2). The first drive device (4) drives the second impeller (3) to rotate.

2. The double-impeller anti-backflow pumping device according to claim 1, characterized in that: The first driving device (4) includes a stator (41) and a rotor (42). The base (1) is provided with a rotor receiving cavity (12). The rotor (42) is disposed in the rotor receiving cavity (12). The stator (41) is disposed in the base (1) and located outside the rotor receiving cavity (12). The rotor (42) rotates by magnetic field coupling. The structure of the second driving device (5) is the same as that of the first driving device (4). The first impeller (2) is connected to the rotor (42) of the first drive device (4), and the first impeller (2) rotates with the rotor (42); The second impeller (3) is connected to the rotor (42) of the second drive device (5), and the second impeller (3) rotates with the rotor (42).

3. The double-impeller anti-backflow pumping device according to claim 1, characterized in that: It also includes a limiting plate (9), which is provided with a first cover cavity (91), a second cover cavity (92) and a third cover cavity (93). The first cover cavity (91) has a first opening (911), the second cover cavity (92) has a second opening (921), and the third cover cavity (93) is located between the first cover cavity (91) and the second cover cavity (92). The first shroud (91) and the third shroud (93) are connected, and the first water inlet (21) is formed at the connection between the first shroud (91) and the third shroud (93). The second cover cavity (92) and the third cover cavity (93) are connected, and the connection between the second cover cavity (92) and the third cover cavity (93) forms the second water outlet (31). The limiting plate (9) sits on the top of the seat (1), the first impeller (2) enters the first cover cavity (91), the second impeller (3) enters the second cover cavity (92), and the water inlet (61), the first swing arm (7) and the second swing arm (8) are all placed in the third cover cavity (93).

4. The double-impeller anti-backflow pumping device according to claim 3, characterized in that: It also includes an upper cover (10), which is detachably disposed on the top of the seat (1), the limiting plate (9) is located inside the upper cover (10), and the upper cover (10) is spaced apart by water inlet holes (101).

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