An automatic exhaust direct current centrifugal water pump

Abstract

The utility model provides an automatic exhaust direct current centrifugal water pump, including pump shell, impeller, direct current drive motor, exhaust valve structure, water inlet and water outlet, be provided with pump cavity in the pump shell, the water inlet and water outlet that set up in the pump shell are linked together with the pump cavity and set up, and install direct current drive motor in the pump shell, the impeller is connected with the impeller of direct current drive motor output end, the impeller is in the pump cavity, and the impeller is provided with the bubble breaking structure for breaking the liquid bubble on, be favorable to water pump exhaust pump water. The utility model sets up the three prism structure on the impeller, the sharp angle of three prism structure front end is same with the impeller rotation direction, when the impeller rotates, can break the larger bubble in the pump cavity and form more small bubbles, with the liquid together from the water outlet and discharge the pump cavity, avoid larger bubble and accumulate in the pump cavity and hinder drainage, greatly improved water pump drainage use effect.

Description

Technical Field

[0001] This utility model relates to the field of water pump structure technology, and in particular to an automatic venting DC centrifugal water pump. Background Technology

[0002] A centrifugal water pump is a machine that uses centrifugal force to transport liquids. Its core working principle is: the drive motor drives the impeller to rotate at high speed, and the liquid in the impeller is thrown towards the outlet under the action of centrifugal force. At the same time, a low pressure or vacuum is formed in the central area of ​​the impeller, so that new liquid is continuously drawn in, completing the continuous transportation process.

[0003] Traditional water pumps are typically driven by AC motors, which are simple in structure and low in cost, but have disadvantages such as large size, heavy weight, low energy efficiency, and inconvenient speed adjustment. With the development of power electronics technology, permanent magnet materials, and battery technology, DC centrifugal water pumps have become the mainstream trend.

[0004] Existing water pump structures generate air bubbles within the pump chamber during operation. These bubbles can cause difficulty or even prevent drainage. Conventional impellers require several tens of minutes to automatically expel the air from the pump chamber, and sometimes they may not be able to expel it at all. This air bubble effect results in the pump continuously failing to pump water; the pump is running, but no water is being produced, leading to poor pumping performance.

[0005] There is a need for a new type of automatic exhaust DC centrifugal water pump that can solve the problems mentioned above. Utility Model Content

[0006] This utility model provides an automatic air-venting DC centrifugal water pump. By technically modifying the existing water pump structure, it solves the problem that the existing water pump structure is difficult to handle, and the air bubbles generated in the pump chamber affect the drainage effect.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An automatic venting DC centrifugal water pump includes a pump casing, an impeller, a DC drive motor, an venting valve structure, an inlet, and an outlet. The pump casing contains a pump chamber, which is connected to the inlet and outlet located outside the pump casing. The DC drive motor is installed inside the pump casing, and a power supply line passes through the pump casing and connects to the DC drive motor. The output end of the DC drive motor is connected to the impeller, which is placed within the pump chamber. The impeller has a bubble-breaking structure for puncturing liquid bubbles. An venting chamber is located at the upper end of the pump chamber, and an venting valve structure for automatically venting the venting chamber is installed thereat.

[0008] Preferably, a motor shaft mounting base is installed inside the pump chamber, and a seal mounting groove is provided in the middle of the motor shaft mounting base. A sealing assembly is installed in the sealing assembly, and a rotating bearing is installed in the middle of the sealing assembly. The output end of the DC drive motor passes through the rotating bearing and the seal until it passes out from above the motor shaft mounting base and connects to the impeller.

[0009] Preferably, the water inlet is located below the motor shaft mounting base, and the motor shaft mounting base is provided with a water inlet hole at the outer periphery of the seal mounting groove. Liquid enters the pump chamber above the motor shaft mounting base through the water inlet hole. The pump chamber is provided with a water outlet channel in the tangential direction of impeller rotation, and the water outlet channel is connected to the water inlet.

[0010] Preferably, the bubble-breaking structure includes a triangular prism structure, with a groove provided at the upper end of the impeller blade, and a triangular prism structure protruding from the inside of the groove, wherein the pointed corner of the front end of the triangular prism structure faces the same direction as the impeller rotation.

[0011] Preferably, the exhaust valve structure includes an electromagnetic exhaust valve and a gas detection sensor. The electromagnetic exhaust valve is installed in the exhaust chamber, and the gas detection sensor is installed on the electromagnetic exhaust valve.

[0012] Preferably, the gas detection sensor is a current sensor or a Hall sensor, and the gas detection sensor is electrically connected to the DC drive motor.

[0013] The beneficial effects of this utility model are as follows: This invention features a DC drive motor and an impeller inside the pump chamber. The DC drive motor drives the impeller to rotate, creating a low-pressure zone at the center of the impeller. Liquid is drawn into the pump chamber through the inlet hole and thrown towards the edge of the impeller under centrifugal force, entering the pump casing. The pressure increases, and the liquid is discharged from the outlet.

[0014] This application provides an exhaust valve structure at the upper end of the pump chamber, which can discharge the gas accumulated in the exhaust chamber through the electromagnetic exhaust valve.

[0015] This application features a triangular prism structure on the impeller, with the pointed end of the prism facing the same direction as the impeller's rotation. When the impeller rotates, it can puncture larger air bubbles in the pump chamber, forming numerous smaller air bubbles that are discharged from the pump chamber along with the liquid through the outlet. This prevents larger air bubbles from accumulating in the pump chamber and obstructing drainage, thus facilitating air removal and water pumping. The improved impeller structure of this application can expel air in a short time (3-5 minutes), resulting in better pumping performance, longer service life, and significantly improved drainage efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a schematic diagram of the internal structure of the pump chamber of this utility model; Figure 3 This is a schematic cross-sectional view of the present invention; Figures 4-5 This is a schematic diagram of the exploded structure of this utility model; Figure 6 This is a schematic diagram of the impeller structure; The following are the reference numerals: Pump casing 1, Pump chamber 11, Exhaust chamber 12, Water outlet channel 13, Impeller 2, Groove 21, DC drive motor 3, Power supply line 31, Exhaust valve structure 4, Inlet 5, Outlet 6, Bubble breaking structure 7, Triangular prism structure 71, Motor shaft mounting seat 8, Seal mounting groove 81, Seal assembly 82, Rotary bearing 83, Inlet hole 84. Detailed Implementation

[0017] The specific content of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] Please see Figure 1-6 As shown, this utility model provides an automatic venting DC centrifugal water pump, including a pump casing 1, an impeller 2, a DC drive motor 3, an venting valve structure 4, an inlet 5, and an outlet 6. The pump casing 1 is provided with a pump chamber 11, which is connected to the inlet 5 and the outlet 6 located outside the pump casing 1. The DC drive motor 3 is installed inside the pump casing 1. A power supply line 31 passes through the pump casing 1 and is connected to the DC drive motor 3. The output end of the DC drive motor 3 is connected to the impeller 2, which is placed in the pump chamber 11. The impeller 2 is provided with a bubble-breaking structure 7 for puncturing liquid bubbles. The upper end of the pump chamber 11 is provided with an venting chamber 12, and an venting valve structure 4 for automatically venting the venting chamber 12 is installed at the venting chamber 12.

[0019] Furthermore, to provide a rotational seal for the motor shaft, prevent liquid leakage into the motor, and ensure the pump's lifespan, a motor shaft mounting seat 8 is installed inside the pump chamber 11. A sealing element mounting groove 81 is located in the middle of the motor shaft mounting seat 8, and a sealing assembly 82 is installed within the sealing assembly 82. A rotating bearing 83 is installed in the middle of the sealing assembly 82. The output end of the DC drive motor 3 passes through the rotating bearing 83 and the sealing element until it exits from above the motor shaft mounting seat 8 and connects to the impeller 2. The DC drive motor 3 has the advantages of high efficiency, long lifespan, and good controllability.

[0020] Furthermore, the water inlet 5 is located below the motor shaft mounting base 8, and the motor shaft mounting base 8 is provided with a water inlet hole 84 at the outer periphery of the seal mounting groove 81. The liquid enters the pump chamber 11 above the motor shaft mounting base 8 through the water inlet hole 84. The pump chamber 11 is provided with a water outlet channel 13 in the tangential direction of the impeller 2 rotation, and the water outlet channel 13 is connected to the water outlet 6.

[0021] Furthermore, the bubble-breaking structure 7 includes a triangular prism structure 71. A groove 21 is provided at the upper end of the impeller 2 blades, and the triangular prism structure 71 protrudes from inside the groove 21. The pointed end of the triangular prism structure 71 faces the same direction as the rotation of the impeller 2. When the impeller 2 rotates, the triangular prism structure 71 can puncture bubbles, forming multiple tiny bubbles, which are discharged from the outlet 6 along with the water flow, preventing blockage of the outlet cavity 13.

[0022] Furthermore, the exhaust valve structure 4 includes an electromagnetic exhaust valve and a gas detection sensor. The electromagnetic exhaust valve is installed in the exhaust chamber 12, and the gas detection sensor is installed on the electromagnetic exhaust valve.

[0023] Furthermore, the gas detection sensor is selected from either a current sensor or a Hall sensor, and the gas detection sensor is electrically connected to the DC drive motor 3. The current sensor is used to monitor the motor's operating current, while the Hall sensor can accurately provide feedback on the rotational speed.

[0024] In this application, a DC drive motor 3 and an impeller 2 are provided in the pump chamber 11. The DC drive motor 3 drives the impeller 2 to rotate, and a low-pressure zone is formed at the center of the impeller 2. Liquid is drawn into the pump chamber 11 through the water inlet 84. Under the action of centrifugal force, the liquid is thrown to the edge of the impeller 2 and enters the pump casing 1. The pressure increases and it is discharged from the water outlet 6.

[0025] At this time, since the pump chamber 11 is filled with liquid, the motor load is normal, and the operating current is stable within the preset range. The main control system determines that the status is normal, and the exhaust valve remains closed.

[0026] When gas enters the exhaust chamber 12, it accumulates inside the pump, causing the impeller 2 to run dry and unable to draw water normally. This reduces the motor load and significantly decreases the operating circuit speed (or causes abnormal speed). The main control system monitors the abnormal operation in real time and issues a control command to first stop the motor from running to prevent dry running from damaging the mechanical seal. Then, the main control system controls the opening of the electromagnetic exhaust valve, and the gas accumulated in the exhaust chamber 12 escapes from the exhaust valve under atmospheric pressure.

[0027] After the exhaust valve is opened, the main control system will intermittently start the motor for a short time. The purpose of the short-term operation is to use the rotation of impeller 2 to stir the liquid (and gas mixture) in pump chamber 11 and water inlet pipe upward, so that the liquid fills the space vacated by the gas discharge and pushes the residual gas to exhaust chamber 12.

[0028] Intermittent operation allows the liquid to flow back naturally under gravity, which helps the gas separate and rise to the top. The "intermittent operation-venting" process is repeated several times, and the main control system continuously monitors the current each time the motor is briefly started. When the current value is detected to have returned to the normal load level, it indicates that the pump chamber 11 is full of liquid and the gas has been vented. At this time, the venting valve is closed, the motor is controlled to enter the normal continuous operation mode, and the water pump resumes its rated flow and head output.

[0029] This application features a triangular prism structure 71 on the impeller 2. The pointed end of the triangular prism structure 71 faces the same direction as the rotation of the impeller 2. When the impeller 2 rotates, it can puncture larger air bubbles in the pump chamber 11, forming more tiny air bubbles. These tiny air bubbles are discharged from the pump chamber 11 along with the liquid through the outlet 6, preventing larger air bubbles from accumulating in the pump chamber 11 and obstructing drainage. This facilitates air removal and water pumping. The improved impeller structure of this application can expel air in a short time (3-5 minutes), resulting in better pumping performance, longer service life, and significantly improved drainage efficiency.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An automatic exhaust DC centrifugal water pump, characterized in that, The system includes a pump casing, an impeller, a DC drive motor, an exhaust valve structure, an inlet, and an outlet. The pump casing contains a pump chamber, which is connected to the inlet and outlet located outside the pump casing. A DC drive motor is installed inside the pump casing, and a power supply line passes through the pump casing and connects to the DC drive motor. The output end of the DC drive motor is connected to the impeller, which is placed within the pump chamber. The impeller has a bubble-breaking structure for puncturing liquid bubbles. An exhaust chamber is located at the upper end of the pump chamber, and an exhaust valve structure is installed at the exhaust chamber for automatic exhaust.

2. The automatic exhaust DC centrifugal water pump according to claim 1, characterized in that, A motor shaft mounting base is installed inside the pump chamber. A seal mounting groove is provided in the middle of the motor shaft mounting base. A sealing assembly is installed in the sealing assembly. A rotating bearing is installed in the middle of the sealing assembly. The output end of the DC drive motor passes through the rotating bearing and the seal until it passes out from above the motor shaft mounting base and connects to the impeller.

3. The automatic exhaust DC centrifugal water pump according to claim 2, characterized in that, The water inlet is located below the motor shaft mounting base, and the motor shaft mounting base is provided with a water inlet hole at the outer periphery of the seal mounting groove. Liquid enters the pump chamber above the motor shaft mounting base through the water inlet hole. The pump chamber is provided with a water outlet channel in the tangential direction of impeller rotation, and the water outlet channel is connected to the water outlet.

4. The automatic exhaust DC centrifugal water pump according to claim 1, characterized in that, The bubble-breaking structure includes a triangular prism structure. A groove is provided at the upper end of the impeller blade, and a triangular prism structure protrudes from inside the groove. The pointed corner of the front end of the triangular prism structure faces the same direction as the impeller rotation.

5. An automatic exhaust DC centrifugal water pump according to claim 1, characterized in that, The exhaust valve structure includes an electromagnetic exhaust valve and a gas detection sensor. The electromagnetic exhaust valve is installed in the exhaust chamber, and the gas detection sensor is installed on the electromagnetic exhaust valve.

6. An automatic exhaust DC centrifugal water pump according to claim 5, characterized in that, The gas detection sensor is selected from current sensors or Hall sensors, and the gas detection sensor is electrically connected to the DC drive motor.

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