Self-priming pump air-water separation structure

Abstract

This application relates to a self-priming pump air-water separation structure, including a pump body. The pump body has a pump cavity, a water outlet, and a water inlet. The water inlet and the water outlet are both connected to the pump cavity. An impeller is rotatably connected to the inner wall of the pump cavity. The impeller rotates and transports water from the water inlet to the water outlet. A baffle plate is connected to the inner wall of the pump cavity to limit the formation of swirling flow of water within the pump cavity. The baffle plate in this application eliminates the need for repeated water circulation to expel air, thereby shortening the pump's venting time and ensuring efficient pump operation. The buffer surface reduces the water velocity on the inner wall of the pump cavity, decreasing internal water circulation and further improving the efficiency of air expulsion. The positioning gap prevents the housing from shifting on the pump body, thus improving the connection stability of the housing.

Description

Technical Field

[0001] This application relates to the field of self-priming pumps, and more particularly to a self-priming pump air-water separation structure. Background Technology

[0002] Self-priming pumps are a type of self-priming centrifugal pump. The working principle of a self-priming pump is that before starting the pump, the pump casing is filled with water or there is some water inside the pump casing. When the self-priming pump starts, the impeller rotates at high speed, driving the water in the impeller channel to flow towards the volute. At this time, a vacuum is formed at the inlet, causing the inlet check valve to open. Air in the suction pipe enters the pump and reaches the outer edge through the impeller channel and is discharged through the outlet. This cycle is repeated, gradually expelling the air in the suction pipe and allowing water to enter the pump, thus achieving the purpose of self-priming.

[0003] During normal pump operation, the impeller rotation drives the liquid, carrying gas, to flow towards the outer edge of the volute. A white foam band of a certain thickness and a high-speed rotating liquid ring are formed at the outer edge of the impeller. The gas-liquid mixture is discharged through the drain port. The degassed liquid returns to the volute and mixes again with the gas drawn in from the suction pipe inside the impeller. Under the action of the high-speed rotating impeller, it flows towards the outer edge of the impeller again. As this process continues cyclically, the air in the suction pipe gradually decreases until all the gas is exhausted, completing the self-priming process, and the pump begins normal operation.

[0004] The gas inside the pump casing needs to be purged repeatedly by water circulation, which prolongs the purging time and makes it difficult to completely remove the gas. This affects the pump's suction head and causes problems such as long water filling time and unstable water pressure. Summary of the Invention

[0005] To improve the problem of long exhaust time of self-priming pumps, this application provides a self-priming pump air-water separation structure.

[0006] This application provides a self-priming pump air-water separation structure, which adopts the following technical solution:

[0007] A self-priming pump air-water separation structure includes a pump body, which has a pump cavity, a water outlet, and a water inlet. The water inlet and the water outlet are both connected to the pump cavity. An impeller is rotatably connected to the inner wall of the pump cavity. The impeller rotates and transports water from the water inlet toward the water outlet. A baffle plate is connected to the inner wall of the pump cavity to limit the formation of swirling water in the pump cavity.

[0008] By adopting the above technical solution, when the impeller rotates, the air velocity in the pump chamber increases and the air pressure decreases. Water enters the pump chamber through the inlet hole. The water flows along the inner wall of the pump chamber due to the centrifugal force generated by the impeller rotation. The baffle plate is connected to the inner wall of the pump chamber. The water flowing in the pump chamber hits the end face of the baffle plate, which buffers the flow velocity of the water in the pump chamber and causes it to settle on the bottom wall of the pump chamber. The air density is less than that of water and flows towards the drain hole, realizing the separation of water and air. The air in the pump chamber is discharged through the drain hole, realizing the exhaust of air in the pump chamber, completing the self-priming process, and starting the normal operation of the pump body. There is no need to repeatedly purge the air by circulating water, thereby shortening the exhaust time of the pump body and ensuring the efficient operation of the pump body.

[0009] Optionally, the length direction of the baffle plate is parallel to the axis of rotation of the impeller.

[0010] By adopting the above technical solution, the length direction of the baffle plate is parallel to the rotation axis of the impeller. When the water in the pump cavity rotates along the inner wall of the pump cavity due to the centrifugal force generated by the rotation of the impeller, the contact area between the water and the end face of the baffle plate is increased, the buffering effect of the baffle plate on the water in the pump cavity is enhanced, and the deceleration effect of the water in the pump cavity is further improved.

[0011] Optionally, the end face of the baffle plate facing the impeller rotation axis is provided with a buffer surface, which is in the shape of a circular arc protrusion.

[0012] By adopting the above technical solution, when the impeller rotates, the water in the pump cavity flows along the inner wall of the pump cavity due to the centrifugal force generated by the impeller rotation. The water impacts the buffer surface and is guided to be deposited on the bottom wall of the pump cavity, reducing the flow velocity of water on the inner wall of the pump cavity, reducing the internal circulation flow of water in the pump cavity, and further improving the efficiency of air discharge in the pump cavity.

[0013] Optionally, the pump body includes a drive section and a flow guide section, the ends of the drive section and the flow guide section are connected, the pump chamber is located between the drive section and the flow guide section, the impeller is rotatably connected to the inner wall of the drive section, the baffle plate is connected to the inner wall of the flow guide section, the drive section has a positioning gap facing the outer wall of the flow guide section, and the baffle plate is inserted into the positioning gap.

[0014] By adopting the above technical solution, when the ends of the drive unit and the drainage unit are connected, the pump chamber is located between the drive unit and the drainage unit, and the baffle plate is inserted into the positioning gap, so that the drive unit is not easy to deviate on the drainage unit, thereby improving the connection stability of the drive unit on the drainage unit.

[0015] Optionally, at least two positioning plates are connected to the outer wall of the drive unit, and the positioning gap is located between adjacent positioning plates.

[0016] By adopting the above technical solution, when the drive unit is connected to the flow guide unit, the baffle plate is inserted into the positioning gap and is located between two adjacent positioning plates. The outer wall of the baffle plate abuts against the end face of the positioning plate to form a limit, making it difficult for the baffle plate to fall off the housing, thereby further improving the connection stability between the drive unit and the flow guide unit.

[0017] Optionally, the end face of the baffle plate facing the drive unit is provided with a guide surface, and the guide surface is in the shape of a circular arc protrusion.

[0018] By adopting the above technical solution, when the drive unit is connected to the drainage unit, the guide surface abuts against the end face of the positioning block, and the guide surface guides the flow baffle plate to be inserted into the positioning gap. This eliminates the need for workers to precisely align the flow baffle plate with the positioning gap, thereby improving the installation efficiency of the drive unit and the drainage unit.

[0019] Optionally, the end face of the positioning block facing the flow deflector is provided with a positioning surface, which is in the shape of a circular arc protrusion.

[0020] By adopting the above technical solution, when the drive unit is connected to the drainage unit, the positioning surface abuts against the guide surface, and the positioning surface guide baffle is inserted into the positioning gap, further improving the connection stability between the drive unit and the drainage unit.

[0021] Optionally, two baffles are provided, and the two baffles are evenly distributed around the rotation axis of the impeller.

[0022] By adopting the above technical solution, the two baffles are evenly distributed around the rotation axis of the impeller, increasing the contact area between the water and the baffles. Furthermore, the end face of the baffles abuts against the outer wall of the drive unit, making it less likely for the drive unit to shift when connected to the flow guide unit, thereby improving the connection stability between the drive unit and the flow guide unit.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The baffle plate eliminates the need for repeated water circulation to expel air, thus shortening the pump's venting time and ensuring efficient pump operation;

[0025] 2. The buffer surface reduces the flow velocity of water on the inner wall of the pump chamber, reduces the internal circulation of water in the pump chamber, and further improves the efficiency of air discharge in the pump chamber.

[0026] 3. The positioning gap is designed to prevent the housing from shifting on the pump body, thereby improving the connection stability of the housing on the pump body. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0028] Figure 2This is a cross-sectional view of Embodiment 1 of this application, mainly showing the water inlet hole.

[0029] Figure 3 This is a cross-sectional view of Embodiment 1 of this application, mainly showing the baffle plate.

[0030] Figure 4 This is a schematic diagram of the installation structure of the drive unit and the drive motor in Embodiment 1 of this application.

[0031] Figure 5 This is a schematic diagram of the overall structure of the guide plate in Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Pump body; 11. Pump chamber; 12. Inlet hole; 121. Inlet section; 122. Connecting section; 13. Outlet hole; 14. Drive unit; 15. Drainage unit; 16. Threaded section one; 17. Threaded section two; 2. Drive motor; 3. Impeller; 4. Baffle plate; 41. Buffer surface; 42. Guide surface; 5. Positioning plate; 51. Positioning gap; 52. Positioning surface; 6. Guide plate; 61. Waterproof and ventilated part; 62. Reinforcing part; 621. Mounting groove; 7. Elastic element. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a self-priming pump air-water separation structure.

[0035] Example 1

[0036] Reference Figure 1 and Figure 2 The self-priming pump air-water separation structure includes a pump body 1, which has a pump chamber 11, a water inlet 12, and a water outlet 13. The water inlet 12 and the water outlet 13 are both connected to the pump chamber 11. Water enters the pump chamber 11 through the water inlet 12 and is discharged through the water outlet 13. At the same time, it drives the air in the pump chamber 11 to be discharged through the water outlet 13, thereby realizing the exhaust of air in the pump chamber 11, completing the self-priming process, and realizing the normal operation of the pump body 1.

[0037] Reference Figure 2The pump body 1 includes a drive section 14 and a diversion section 15. The ends of the drive section 14 and the diversion section 15 are fixed together by screws to form the pump body 1, and the inner circumferential wall of the diversion section 15 is pressed against the outer circumferential wall of the drive section 14 to form a seal. The pump chamber 11 is located between the drive section 14 and the diversion section 15. The inlet hole 12 and the outlet hole 13 are both on the outer wall of the diversion section 15. The inlet hole 12 includes an inlet section 121 and a connecting section 122. The inlet section 121 and the connecting section 122 are connected at their ends in sequence. The axis of the inlet section 121 is perpendicular to the axis of the connecting section 122. The end of the inlet section 121 away from the connecting section 122 is connected to the outside air. The end of the connecting section 122 away from the inlet section 121 is connected to the pump chamber 11, and the axis of the outlet hole 13 is parallel to the axis of the connecting section 122.

[0038] Reference Figure 2 The inner wall of the inlet section 121, away from the connecting section 122, is provided with a threaded section 16 for threaded connection of an external water pipe. The inner wall of the outlet hole 13, away from the pump chamber 11, is provided with a threaded section 17 for threaded connection of an external water pipe. When the two external water pipes are tightened and fixed to the inner walls of the threaded section 16 and the threaded section 17 respectively, the water in one of the external water pipes passes through the threaded section 16, the inlet section 121, the connecting section 122, the pump chamber 11, the outlet hole 13 and is discharged from the other external water pipe, thus realizing the transportation of water.

[0039] Reference Figure 2 A drive motor 2 is fixed to the end face of the drive unit 14 away from the diversion part 15 by screws. The end of the motor shaft of the drive motor 2 passes through the outer wall of the drive unit 14 and is located inside the pump chamber 11. The axis of the motor shaft of the drive motor 2 is parallel to the axis of the water inlet section 121. An impeller 3 is rotatably connected to the inner wall of the drive unit 14 away from the diversion part 15. The impeller 3 is coaxially fixed to the end of the motor shaft of the drive motor 2, and the rotating end of the impeller 3 faces the pump chamber 11.

[0040] Reference Figure 3 Two baffle plates 4 are fixed on the inner wall of the flow guide section 15. The two baffle plates 4 are evenly distributed around the rotation axis of the impeller 3. The baffle plates 4 are strip-shaped plates, and their length direction is parallel to the rotation axis of the impeller 3. The end face of the baffle plates 4 facing the rotation axis of the impeller 3 is provided with a buffer surface 41, which is in the shape of a circular arc protrusion.

[0041] Reference Figure 2 and Figure 3When the drive motor 2 drives the impeller 3 to rotate, the air in the pump chamber 11 rotates at high speed due to the rotation of the impeller 3, and the air pressure in the pump chamber 11 decreases. This drives the water to pass through the inlet section 121 and the connecting section 122 in sequence and enter the pump chamber 11. The water flows along the inner wall of the pump chamber 11 due to the centrifugal force generated by the rotation of the impeller 3. The water impacts the end face of the baffle plate 4, which buffers the flow rate of the water, making it difficult for the water to form a self-circulating flow in the pump chamber 11. The water is deposited on the bottom wall of the pump chamber 11 along the buffer surface 41 due to its own gravity. The air density in the pump chamber 11 is less than the water density, so the air in the pump chamber 11 gathers above the water surface in the pump chamber 11, realizing the separation of water and air. The air in the pump chamber 11 is driven to be discharged from the outlet hole 13, thereby realizing the venting operation in the pump chamber 11, shortening the venting time, and improving the operating efficiency of the self-priming pump.

[0042] Reference Figure 3 and Figure 4 In this embodiment, the drive unit 14 is fixed with four positioning plates 5 against the outer wall of the flow guide 15. The positioning plates 5 are strip-shaped plates, and the length direction of the positioning plates 5 is parallel to the length direction of the flow deflector 4. Two positioning plates 5 form a group, and the two groups of positioning plates 5 are evenly distributed around the rotation axis of the impeller 3. Each group of positioning plates 5 corresponds one-to-one with the flow deflector 4, and a positioning gap 51 is left between adjacent positioning plates 5 in the same group. The positioning gap 51 is used for the flow deflector 4 to be inserted. As another option, the drive unit 14 is evenly provided with two positioning gaps 51 at intervals against the outer wall of the flow guide 15. The positioning gaps 51 correspond one-to-one with the flow deflector 4, and the positioning gaps 51 are used for the flow deflector 4 to be inserted.

[0043] Reference Figure 3 and Figure 4 The positioning gap 51 is a strip-shaped groove, and the length direction of the positioning gap 51 is parallel to the length direction of the baffle plate 4. The end face of the baffle plate 4 facing the positioning gap 51 is provided with a guide surface 42, which is arc-shaped and convex. The end face of the positioning block facing the baffle plate 4 is provided with a positioning surface 52, which is arc-shaped and convex.

[0044] The implementation principle of the self-priming pump air-water separation structure in Embodiment 1 of this application is as follows: During installation, the end of the drive unit 14 is fixed to the end face of the diversion part 15 by screws. The baffle plate 4 corresponds one-to-one with the positioning gap 51, and the baffle plate 4 is inserted into the positioning gap 51 to achieve the positioning installation of the drive unit 14 and the diversion part 15, so that the drive unit 14 is not easy to shift in the diversion part 15, thereby ensuring the stability of the pump body 1 during operation. The drive motor 2 drives the impeller 3 to rotate. The air in the pump chamber 11 rotates at high speed due to the rotation of the impeller 3, and the air pressure in the pump chamber 11 decreases, driving the water to pass through the inlet section 121 and the connecting section 122 in sequence and enter the pump chamber 11. Inside, water flows along the inner wall of the pump chamber 11 under the centrifugal force generated by the rotation of the impeller 3. The water impacts the end face of the baffle plate 4, which buffers the flow rate of the water, making it difficult for the water to form a self-circulating flow in the pump chamber 11. The water is deposited on the bottom wall of the pump chamber 11 along the buffer surface 41 due to its own gravity. The air density in the pump chamber 11 is less than that of the water, causing the air in the pump chamber 11 to accumulate above the water surface, thus achieving water-air separation. This drives the air in the pump chamber 11 to be discharged from the water outlet 13, thereby achieving the air venting operation in the pump chamber 11 without the need for repeated water circulation to vent the air in the pump chamber 11, thus shortening the venting time and improving the high-efficiency operation of the self-priming pump.

[0045] Example 2

[0046] Reference Figure 3 and Figure 5 The difference between Embodiment 2 and Embodiment 1 is that a guide plate 6 is rotatably connected to the buffer surface 41. The guide plate 6 is a strip plate, and its length direction is parallel to that of the baffle plate 4. Furthermore, the rotation axis of the guide plate 6 is parallel to the length direction of the baffle plate 4. An elastic element 7 connects the guide plate 6 and the baffle plate 4. The elastic element 7 can be a compression spring or a torsion spring; in this embodiment, the elastic element 7 is a torsion spring, possessing a certain deformation capability. One end of the torsion spring in the direction of its elastic force abuts against the end face of the baffle plate 4, and the other end abuts against the end face of the guide plate 6. The elastic element 7 has the elastic force to drive the guide plate 6 to rotate towards the rotation axis of the impeller 3.

[0047] Reference Figure 2 and Figure 5The guide plate 6 includes a water-proof and ventilated part 61 and a reinforcing part 62. The reinforcing part 62 has an installation groove 621 that penetrates the outer wall of the reinforcing part 62. The outer wall of the water-proof and ventilated part 61 is pressed against the inner wall of the installation groove 621 to form a fixed structure. In this embodiment, the material of the water-proof and ventilated part 61 is expanded polytetrafluoroethylene, which has good air permeability. When water enters the pump chamber 11 through the water inlet hole 12, the water accumulates on the end face of the water-proof and ventilated part 61 and drives the guide plate 6 to rotate away from the rotation axis of the impeller 3. This causes the air at the bottom of the pump chamber 11 to pass through the water-proof and ventilated part 61 and the pump chamber 11 in sequence and be discharged from the water outlet hole 13, thereby realizing the exhaust operation in the pump chamber 11.

[0048] The implementation principle of the self-priming pump air-water separation structure in Embodiment 2 of this application is as follows: When the self-priming pump air-water separation structure is in use, the drive motor 2 drives the impeller 3 to rotate. The air in the pump chamber 11 rotates at high speed due to the rotation of the impeller 3, and the air pressure in the pump chamber 11 decreases. This drives the water to pass through the inlet section 121 and the connecting section 122 in sequence and enter the pump chamber 11. The water flows along the inner wall of the pump chamber 11 due to the centrifugal force generated by the rotation of the impeller 3. The water impacts the end face of the water-proof and ventilated part 61. The water-proof and ventilated part 61 buffers the flow rate of the water, making it difficult for the water to form a self-circulating flow in the pump chamber 11. The water is driven along the water-proof and ventilated part by its own gravity. The water in the pump chamber 11 rotates away from the axis of rotation of the impeller 3. The air density at the bottom of the pump chamber 11 is less than that of water. The water entering the bottom of the pump chamber 11 drives the air at the bottom of the pump chamber 11 to pass through the water-proof vent 61 and enter the top of the pump chamber 11. The elastic element 7 drives the water-proof vent 61 to rotate towards the axis of rotation of the impeller 3 to reset, thereby realizing the separation of water and air in the pump chamber 11. It also drives the air in the pump chamber 11 to be discharged from the water outlet 13, realizing the air exhaust operation in the pump chamber 11. There is no need to repeatedly circulate water to exhaust the air in the pump chamber 11, thereby shortening the air exhaust time and improving the high efficiency of the self-priming pump.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-priming pump air-water separation structure, characterized in that: The system includes a pump body (1), which has a pump chamber (11), an outlet (13), and an inlet (12). The inlet (12) and the outlet (13) are both connected to the pump chamber (11). An impeller (3) is rotatably connected to the inner wall of the pump chamber (11). The impeller (3) rotates and transports water from the inlet (12) toward the outlet (13). A baffle plate (4) is connected to the inner wall of the pump chamber (11). The baffle plate (4) is used to restrict the water in the pump chamber (11) from forming a swirling flow. The end face of the baffle plate (4) facing the rotation axis of the impeller (3) is provided with a buffer surface (41). The buffer surface (41) is rotatably connected to a guide plate (6). The length direction of the guide plate (6) is parallel to the length direction of the baffle plate (4), and the rotation axis of the guide plate (6) is parallel to the length direction of the baffle plate (4). An elastic element (7) is connected between the guide plate (6) and the baffle plate (4). One end of the elastic element (7) in the elastic direction abuts against the end face of the baffle plate (4), and the other end of the elastic element (7) in the elastic direction abuts against the end face of the guide plate (6). The elastic element (7) has the tendency to drive the guide plate (6) to rotate in a direction closer to the rotation axis of the impeller (3).

2. The self-priming pump air-water separation structure according to claim 1, characterized in that: The length direction of the baffle plate (4) is parallel to the rotation axis of the impeller (3).

3. The self-priming pump air-water separation structure according to claim 1, characterized in that: The pump body (1) includes a drive unit (14) and a flow guide unit (15). The ends of the drive unit (14) and the flow guide unit (15) are connected. The pump chamber (11) is located between the drive unit (14) and the flow guide unit (15). The impeller (3) is rotatably connected to the inner wall of the drive unit (14). The baffle plate (4) is connected to the inner wall of the flow guide unit (15). The drive unit (14) has a positioning gap (51) on the outer wall of the flow guide unit (15). The baffle plate (4) is inserted into the positioning gap (51).

4. The self-priming pump air-water separation structure according to claim 3, characterized in that: The outer wall of the drive unit (14) is connected to at least two positioning plates (5), and the positioning gap (51) is located between adjacent positioning plates (5).

5. The self-priming pump air-water separation structure according to claim 4, characterized in that: The flow baffle (4) has a guide surface (42) on its end face facing the drive unit (14), and the guide surface (42) is in the shape of a circular arc protrusion.

6. The self-priming pump air-water separation structure according to claim 5, characterized in that: The positioning plate (5) has a positioning surface (52) on its end face facing the flow barrier (4), and the positioning surface (52) is in the shape of a circular arc protrusion.

7. The self-priming pump air-water separation structure according to claim 3, characterized in that: Two baffles (4) are provided, and the two baffles (4) are evenly distributed around the rotation axis of the impeller (3).

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