A self-venting submersible pump that can be installed upside down

Abstract

This utility model relates to a self-venting submersible pump that can be installed upside down, comprising a motor, a pump body, and a housing. The housing includes an inner cavity and an outer cavity. The rotor of the motor is disposed in the inner cavity, and the stator of the motor is fixed in the outer cavity. The pump body includes an impeller and a pump cover. The impeller is fixed to the rotor, and the pump cover is connected to one end face of the housing. An end cap is fixed to the other end face of the housing. A channel is provided at the bottom of the inner cavity, and a plunger is slidably connected in the channel. A through hole is provided on the end cap, and the plunger cooperates with the through hole. At the moment the pump starts, the hydraulic pressure in the inner cavity rises sharply, compressing the residual air in the inner cavity, which is then discharged through the channel and the through hole. When the air in the inner cavity is emptied, the high-pressure liquid in the cavity pushes the plunger upward, sealing the through hole and preventing flow loss caused by water overflowing from the end cap. Therefore, the pump of this utility model can automatically vent air during the startup phase.

Description

Technical Field

[0001] This utility model relates to a self-venting submersible pump that can be installed upside down. Background Technology

[0002] When a water pump is installed upside down (with the inlet facing vertically downwards), air trapped inside the pump chamber is difficult to expel quickly during initial use. This air contamination of the liquid causes noise and vibration during operation, resulting in a poor user experience. Therefore, it is necessary to address the problem of air trapped inside the pump chamber when the pump is installed upside down. Summary of the Invention

[0003] The present invention aims to overcome the problems in the prior art by designing a self-venting submersible pump that can be installed upside down, which can automatically vent the air in the pump chamber when the pump is started.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a self-venting submersible pump that can be installed upside down, comprising a motor, a pump body, and a housing. The housing includes an inner cavity and an outer cavity. The rotor of the motor is disposed in the inner cavity, and the stator of the motor is fixed in the outer cavity. The pump body includes an impeller and a pump cover. The impeller is fixed to the rotor, and the pump cover is connected to one end face of the housing. An end cover is fixed to the other end face of the housing. A channel is provided at the bottom of the inner cavity, and a plunger is slidably connected in the channel. A through hole is provided on the end cover, and the plunger cooperates with the through hole. At the moment the pump starts, the hydraulic pressure in the inner cavity rises sharply, compressing the residual air in the inner cavity, which is then discharged through the channel and the through hole. When the air in the inner cavity is emptied, the high-pressure liquid in the cavity pushes the plunger upward, sealing the through hole and preventing flow loss caused by water overflowing from the end cover. Therefore, the pump of this utility model can automatically vent air during the startup phase.

[0005] In the above technical solution, preferably, the end cap is provided with a sleeve, the through hole is located inside the sleeve, the sleeve is inserted into the channel, the plunger consists of a base with a diameter larger than the through hole and a column with a diameter smaller than the through hole, a first sealing ring is fitted on the column, the column is inserted into the through hole, and the column is slidably connected in the channel. When the plunger rises, it drives the first sealing ring to rise, blocking the through hole and preventing water from flowing out of the inner cavity.

[0006] In the above technical solution, preferably, the pump cover is provided with an inlet and an outlet, the inlet is located in the middle of the pump cover, and the outlet is located in the tangential direction of the pump cover.

[0007] In the above technical solution, preferably, the sleeve is covered with a second sealing ring, and the end of the channel is in close contact with the second sealing ring.

[0008] In the above technical solution, preferably, the end cover is provided with a wire inlet, and the wire passes through the inlet and is connected to the circuit board in the pump body.

[0009] Compared with existing technologies, the beneficial effects of this invention are as follows: At the moment the water pump starts working, the hydraulic pressure inside the cavity rises sharply, compressing any residual air inside and expelling it through the channel and through-hole. Once the air inside the cavity is expelled, the high-pressure liquid inside pushes the plunger upwards, sealing the through-hole and preventing flow loss caused by water overflowing from the end cap. Therefore, the water pump of this invention can automatically expel air during the startup phase. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0011] Figure 2 This is a cross-sectional view of the present invention.

[0012] Figure 3 for Figure 2 A partially enlarged schematic diagram (the water pump has just started).

[0013] Figure 4 for Figure 2 A partially enlarged schematic diagram (when the water pump is running).

[0014] In the diagram: 1. Motor, 11. Rotor, 12. Stator, 2. Pump body, 21. Impeller, 22. Pump cover, 221. Inlet, 222. Outlet, 3. Outer shell, 31. Inner cavity, 311. Channel, 32. Outer cavity, 4. Plunger, 41. Base, 42. Column, 43. First sealing ring, 5. End cover, 5a. Through hole, 51. Sleeve, 52. Second sealing ring, 53. Wire, 6. Circuit board. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Please see Figure 1-4This utility model provides a technical solution: a self-venting submersible pump that can be installed upside down, including a motor 1, a pump body 2 and a housing 3.

[0018] The outer casing 3 includes an inner cavity 31 and an outer cavity 32. The rotor 11 of the motor 1 is disposed in the inner cavity, and the stator 12 of the motor 1 is fixed in the outer cavity.

[0019] The pump body 2 includes an impeller 21 and a pump cover 22, and the impeller 21 is fixed to the rotor 11.

[0020] The pump cover 22 is provided with an inlet 221 and an outlet 222. The inlet is located in the middle of the pump cover, and the outlet is located in the tangential direction of the pump cover.

[0021] The pump cover 22 is connected to one end face of the outer shell 3, and an end cap 5 is fixed on the other end face of the outer shell 3.

[0022] The end cover 5 is provided with a wire inlet, and the wire 53 passes through the inlet and is connected to the circuit board 6 inside the pump body 2.

[0023] The bottom of the inner cavity 31 is provided with a channel 311, and a plunger 4 is slidably connected in the channel 311. The end cap 5 is provided with a through hole 5a, and a sleeve 51 is provided on the end cap 5. The through hole 5a is located in the sleeve 51. The sleeve 51 is inserted into the channel 311.

[0024] The plunger 4 is divided into a base 41 with a diameter larger than the through hole and a column 42 with a diameter smaller than the through hole. A first sealing ring 43 is fitted on the column 42. The column 42 is inserted into the through hole 5a and is slidably connected in the channel 311.

[0025] The sleeve 51 is covered with a second sealing ring 52, and the end of the channel 311 is in close contact with the second sealing ring 52.

[0026] The plunger 4 engages with the through hole 5a. At the moment the pump starts, the hydraulic pressure inside the cavity rises sharply, compressing any residual air within the cavity, which is then expelled through the channel and through hole. Once the air is expelled, the high-pressure liquid inside the cavity pushes the plunger upwards. As the plunger rises, it causes the first sealing ring to rise, blocking the through hole and preventing water from flowing out of the cavity, thus avoiding flow loss due to water overflowing from the end cover. Therefore, the pump of this invention can automatically expel air during the startup phase.

Claims

1. A self-venting submersible pump that can be installed upside down, comprising a motor, a pump body, and a housing, wherein the housing includes an inner cavity and an outer cavity, the rotor of the motor is disposed in the inner cavity, the stator of the motor is fixed in the outer cavity, the pump body includes an impeller and a pump cover, the impeller is fixed to the rotor, the pump cover is connected to one end face of the housing, and an end cap is fixed to the other end face of the housing, characterized in that: The bottom of the inner cavity is provided with a channel, and a plunger is slidably connected in the channel. The end cap is provided with a through hole, and the plunger cooperates with the through hole.

2. The invertible self-venting submersible pump according to claim 1, characterized in that: The end cap is provided with a sleeve, the through hole is located inside the sleeve, the sleeve is inserted into the channel, the plunger is divided into a base with a diameter larger than the through hole and a column with a diameter smaller than the through hole, the column is fitted with a first sealing ring, the column is inserted into the through hole, and the column is slidably connected in the channel.

3. The invertible self-venting submersible pump according to claim 2, characterized in that: The pump cover is provided with an inlet and an outlet. The inlet is located in the middle of the pump cover, and the outlet is located in the tangential direction of the pump cover.

4. The invertible self-venting submersible pump according to claim 2, characterized in that: The sleeve is covered with a second sealing ring, and the end of the channel is in close contact with the second sealing ring.

5. The invertible self-venting submersible pump according to claim 1, characterized in that: The end cap is provided with a wire inlet, and the wire passes through the inlet and is connected to the circuit board inside the pump body.

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