A water pump

Abstract

This invention provides a water pump, belonging to the field of water pump technology. It solves the problem of high noise in existing water pumps. The water pump includes a pump body with an inlet, an outlet, and a pump chamber. The pump chamber has a volute, which divides the pump chamber into an inlet chamber connected to the inlet and an outlet chamber connected to the outlet. The outlet chamber surrounds the circumferential outer side of the inlet chamber. One end of the outlet chamber is connected to the inlet chamber through several spaced-apart guide channels, all of which form a ring. A ring-shaped guide plate is fixedly connected to the outlet chamber, located between the guide channels and the outlet. The guide plate has several through-holes spaced apart within it. This water pump has the advantage of low noise.

Description

Technical Field

[0001] This invention belongs to the field of water pump technology and relates to a water pump. Background Technology

[0002] A water pump is a machine that transports or pressurizes liquids. It transfers mechanical energy from a prime mover or other external energy sources to a liquid, increasing the liquid's energy. Water pumps are primarily used to transport liquids including water, oil, acids and alkalis, emulsions, suspensions, and liquid metals.

[0003] Existing water pumps, such as the self-priming centrifugal pump disclosed in Chinese patent literature [Patent No.: 202110160554.8; Application Publication No.: CN112922844A], include a pump body with a pump chamber, a volute disposed within the pump chamber, and an impeller disposed within the volute. The pump body has an inlet communicating with the inner cavity of the volute. The volute has a spray nozzle that draws water from the volute through the impeller. The volute has a guide plate, and the impeller has a suction port. A return valve can be detachably connected to the bottom of the volute. The return valve has an outlet communicating with the pump chamber and the inner cavity of the volute. The guide plate is disposed between the inlet and the outlet, with the outlet and the surface of the guide plate facing each other. The guide plate is located outside the suction port, and one end of the guide plate faces the suction port and is directly opposite the suction port.

[0004] In this type of pump, the impeller rotates, drawing water from the inlet into the volute. The impeller's rotation then forces the water out of the volute through the nozzle and into the pump chamber outside the volute. Some water then flows back into the volute through the return valve, while the remainder flows out of the pump. As the water flows within the pump chamber, the impeller's agitation causes irregular flow, leading to collisions and impacts with internal pump components, increasing pump noise. Simultaneously, the water ejected from the nozzle from the volute generates significant impact force, resulting in loud noise from the water hitting the pump's internal wall. Furthermore, the irregular water flow significantly impacts the return valve, causing it to vibrate and further increasing noise. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a water pump that solves the technical problem of how to reduce the noise of the water pump.

[0006] The objective of this invention can be achieved through the following technical solution: A water pump, comprising a pump body having an inlet, an outlet, and a pump chamber, wherein the pump chamber has a volute, the volute dividing the pump chamber into an inlet chamber communicating with the inlet and an outlet chamber communicating with the outlet, characterized in that the outlet chamber surrounds the circumferential outer side of the inlet chamber, one end of the outlet chamber is connected to the inlet chamber through a plurality of spaced-apart guide channels, all of the guide channels forming an annular shape, and an annular guide plate is fixedly connected in the outlet chamber, the guide plate being located between the guide channels and the outlet, and a plurality of through guide holes being spaced-apart in the guide plate.

[0007] The impeller is installed in the inlet chamber. When the pump starts, the impeller rotates, and water enters the inlet chamber through the inlet port. Then, it flows through the guide channel into the upstream outlet chamber, which surrounds the inlet chamber in a ring shape. One end of the outlet chamber connects to the inlet chamber through several spaced, ring-shaped guide channels. These channels streamline the water stirred by the impeller, ensuring a relatively orderly flow of water from the inlet chamber to the upstream outlet chamber. This minimizes collisions between water flows and impacts on internal pump components, thus reducing pump noise. Subsequently, the water flows through guide holes into the downstream outlet chamber. These guide holes further streamline the water flow, ensuring a more orderly entry into the downstream outlet chamber, minimizing collisions between water flows and impacts on internal pump components, thereby reducing pump noise. Finally, the water is discharged from the outlet. The baffle plate separates the water in the outlet chamber, preventing the water in the upstream outlet chamber and the water in the downstream outlet chamber from colliding with each other and reducing noise.

[0008] In the aforementioned water pump, the pump body has several arc-shaped, protruding guide strips. Two adjacent guide strips form the flow channel. The inner end of each guide strip is located at the edge of the inlet chamber, and the outer end extends to the outer side of the inner end of the adjacent guide strip. The impeller drives the water to rotate, generating centrifugal force that flings the water outward. The arc-shaped guide strips and the arrangement of adjacent guide strips ensure that the flow channel is aligned with the direction the water is flung out, thus altering the flow direction and allowing the water to enter the outlet chamber more smoothly. This stabilizes the water flow and reduces noise.

[0009] In the aforementioned water pump, the guide hole is circular, with a first reinforcing ring at its edge, a second reinforcing ring on the inner wall of the guide plate, and a third reinforcing ring on the outer wall of the guide plate. The first, second, and third reinforcing rings are all fixedly connected. This structure provides the guide plate with sufficient strength to withstand the impact of water flow, improving its stability and preventing vibration when subjected to water flow impact, thus reducing pump noise.

[0010] In the aforementioned water pump, the inner wall of the guide plate is fitted to the volute, and the outer wall of the guide plate is fitted to the pump body. The first, second, and third reinforcing rings all protrude from the side of the guide plate downstream of the water flow, while the other side of the guide plate upstream of the water flow is flat. This structure ensures that water flows out through the guide hole. The first, second, and third reinforcing rings ensure the strength of the guide plate while minimizing interference with the water flow. The flatness of the other side of the guide plate allows water to pass through the guide hole more smoothly, increasing the water flow velocity and reducing noise.

[0011] In the aforementioned water pump, one side of the guide plate has several protruding first positioning posts, and the other side of the guide plate has several protruding second positioning posts. The pump body has several first positioning grooves, and the volute has several second positioning grooves. The first positioning posts are embedded in the first positioning grooves, and the second positioning posts are embedded in the second positioning grooves. This structure improves the installation firmness of the guide plate, prevents vibration when the guide plate is subjected to water flow impact, and reduces the noise of the water pump.

[0012] In the aforementioned water pump, the volute casing has a return channel connecting the inlet chamber and the outlet chamber. A return valve is installed in the return channel. The pump body has a locking channel, the inner end of which is connected to the outlet chamber, and the outer end of which penetrates the pump body and is sealed by a first plug. A locking rod passes through the locking channel and is located downstream of the guide plate. The inner end of the locking rod has a locking part that contacts the valve core of the return valve. Rotation of the locking rod causes the valve core to move through the locking part, thus placing the return valve in a normally open or normally closed state. When the water pump requires a self-priming function, rotation of the locking rod causes the valve core to move through the locking part, thus placing the return valve in a normally open state. This allows water in the outlet chamber to flow back to the inlet chamber through the return valve, enabling the water pump to start more efficiently. When the self-priming function is not required, the rotation of the locking rod drives the valve core to move through the locking part, keeping the return valve in a normally closed state. This prevents water in the outlet chamber from flowing back into the inlet chamber, reducing pump noise. Depending on the water pump's installation environment, the normally open or normally closed state of the return valve can be selected, improving the pump's versatility.

[0013] In the aforementioned water pump, the circumferential outer wall of the locking part has a normally closed surface that protrudes in an arc shape and a normally open surface that is recessed in an arc shape. The normally closed surface and the normally open surface are arranged adjacent to each other, and the connection between the normally closed surface and the normally open surface is smoothly transitioned. The valve core includes a protruding abutment part that abuts against either the normally closed surface or the normally open surface. When the abutment part abuts against the normally closed surface, the return valve is in a cut-off state, reducing noise. When the abutment part abuts against the normally open surface, the return valve is in a conducting state, making it convenient to start the water pump. The protruding normally closed surface and the recessed normally open surface can control the stroke and displacement of the valve core, resulting in a simple structure and ingenious design. The arc shape of both the normally closed surface and the smooth transition at the connection point ensures smooth relative movement of the abutment part and the locking part, facilitating adjustment.

[0014] In the aforementioned water pump, the inner wall of the locking channel has an arc-shaped limiting groove. The bottom of the limiting groove is convex in the middle and concave at both ends. The outer end of the locking rod has a protruding limiting part. The limiting part rotates along the limiting groove and can be partially embedded and positioned in both ends of the limiting groove. The rotation of the limiting part along the limiting groove causes the locking rod to rotate in a set direction. The convex bottom of the limiting groove, combined with the first plug, allows the limiting part to be partially embedded and positioned in both ends of the limiting groove, thus locking the locking rod. The locking structure is simple, improves the stability of the locking rod, thereby improving the stability of the return valve and reducing noise. When the limiting part is embedded in one end of the limiting groove, the return valve is in a normally open state; when the limiting part is embedded in the other end of the limiting groove, the return valve is in a normally closed state.

[0015] In the aforementioned water pump, a first check valve is provided at the inlet to allow water to flow from the inlet to the inlet chamber, and a second check valve is provided at the outlet to allow water to flow from the outlet chamber to the outlet. When the water pump stops working, since no more water enters the pump, there is a momentary backflow of water. The first check valve cuts off the inlet, preventing water in the pump chamber from flowing back to the inlet, keeping the pump chamber full of water, preventing negative pressure from forming in the pump chamber, and preventing damage to the pump body and sealing structure, thus improving the pump's service life. The second check valve cuts off the outlet, preventing water from the outlet from entering the pump chamber, avoiding water hammer effect, preventing damage to the pump body and impeller, and improving the pump's service life.

[0016] In the aforementioned water pump, the pump body has a water injection channel and a filter element fixed in the water injection channel. The inner end of the water injection channel is connected to both the water inlet and the water inlet chamber, and the outer end penetrates the pump body and is sealed by a second plug. The filter element is located between the water inlet and the water inlet chamber. The filter element can filter impurities entering from the water inlet, preventing impurities from entering the pump chamber of the pump body, thus reducing the risk of damage to components such as the impeller in the pump chamber, improving the service life of the water pump, and reducing noise. After a period of use, the second plug can be opened to clean the impurities on the filter element through the water injection channel to prevent clogging. Before starting the water pump, a certain amount of water can be injected into the pump chamber through the water injection channel to allow the water pump to expel air from the water inlet and the pump chamber, enabling the water pump to draw water better and making the water pump start-up convenient.

[0017] Compared with the prior art, the water pump provided by the present invention has the following advantages:

[0018] 1. This water pump guides the water flow twice through the guide channel and guide hole, and is isolated by the guide plate to make the water flow smooth, minimizing the collision between water flows and the impact of water flow on the internal parts of the water pump, thereby reducing the noise of the water pump.

[0019] 2. This water pump is equipped with a locking rod, which allows the return valve to be in a normally open or normally closed state. When it is in the normally open state, the water pump can start up better, and when it is in the normally closed state, the water pump noise is reduced. Attached Figure Description

[0020] Figure 1 This is a sectional view of the water pump's inlet, outlet, and pump chamber.

[0021] Figure 2 This is a cross-sectional view of the water pump's flow channel.

[0022] Figure 3 This is a sectional view of the water pump guide plate installation.

[0023] Figure 4 This is a schematic diagram of the overall structure of the downstream side of the water pump guide plate.

[0024] Figure 5 This is a schematic diagram of the overall structure of the upstream side of the guide plate of this water pump.

[0025] Figure 6 This is a schematic diagram of the water pump's return valve in its normally closed state.

[0026] Figure 7 This is a schematic diagram of the water pump's return valve in the normally open state.

[0027] Figure 8 This is a schematic diagram of the overall structure of the water pump locking rod.

[0028] Figure 9 This is a schematic diagram of the limiting part and limiting groove of this water pump.

[0029] In the diagram, 1. Pump body; 11. Inlet; 12. Outlet; 13. Pump chamber; 131. Inlet chamber; 132. Outlet chamber; 14. First positioning groove; 15. Locking channel; 151. Limiting groove; 16. Water injection channel; 2. Volute; 21. Second positioning groove; 22. Return channel; 3. Guide channel; 31. Guide strip; 4. Guide plate; 41. Guide hole; 42. First reinforcing ring; 43. Second reinforcing ring; 44. Third reinforcing ring; 45. First positioning post; 46. Second positioning post; 5. Return valve; 51. Valve core; 511. Abutment part; 6. First plug; 7. Locking rod; 71. Locking part; 711. Normally closed surface; 712. Normally open surface; 72. Limiting part; 8. First check valve; 9. Second check valve; 10. Filter element; 101. Second plug. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] like Figure 1 , Figure 2 , Figure 6 As shown, this water pump includes a pump body 1, a volute 2, a flow guide channel 3, a flow guide plate 4, a return valve 5, a locking rod 7, a first check valve 8, a second check valve 9, and a filter element 10.

[0032] The pump body 1 has an inlet 11, an outlet 12, and a pump chamber 13. A first check valve 8 is installed in the inlet 11, which allows water to flow from the inlet 11 to the inlet chamber 131. A second check valve 9 is installed in the outlet 12, which allows water to flow from the outlet chamber 132 to the outlet 12. The pump body 1 has a water injection channel 16 and a filter element 10 fixed in the water injection channel 16. The inner end of the water injection channel 16 is connected to both the inlet 11 and the inlet chamber 131, and the outer end penetrates the pump body 1 and is sealed by a second plug 101. The filter element 10 is located between the inlet 11 and the inlet chamber 131.

[0033] The volute 2 is fixed in the pump chamber 13. The volute 2 divides the pump chamber 13 into an inlet chamber 131 connected to the inlet 11 and an outlet chamber 132 connected to the outlet 12. The outlet chamber 132 surrounds the circumferential outer side of the inlet chamber 131 and is annular. In this embodiment, one end of the outlet chamber 132 is connected to the inlet chamber 131 through seven spaced guide channels 3. The pump body 1 has seven arc-shaped protruding guide strips 31. Two adjacent guide strips 31 form a guide channel 3. The inner end of the guide strip 31 is located at the edge of the inlet chamber 131, and the outer end of the guide strip 31 extends to the outer side of the inner end of the adjacent guide strip 31. All the guide channels 3 form an annular shape. In actual production, the number of guide channels 3 and guide strips 31 can be five or ten.

[0034] like Figure 3 , Figure 4 , Figure 5 As shown, an annular guide plate 4 is fixed in the water outlet cavity 132. The inner wall of the guide plate 4 is in contact with the volute 2, and the outer wall of the guide plate 4 is in contact with the pump body 1. The guide plate 4 is located between the guide channel 3 and the water outlet 12.

[0035] The guide plate 4 has four protruding first positioning posts 45 on one side and two protruding second positioning posts 46 on the other side. The pump body 1 has four first positioning grooves 14 and the volute 2 has two second positioning grooves 21. The first positioning posts 45 are embedded in the first positioning grooves 14 and the second positioning posts 46 are embedded in the second positioning grooves 21. The guide plate 4 is then fixed in the pump body 1 by fasteners such as bolts.

[0036] In this embodiment, the guide plate 4 is provided with twenty through guide holes 41 at intervals. The guide holes 41 are circular. The edge of the guide hole 41 has a first reinforcing ring 42. The inner side wall of the guide plate 4 has a second reinforcing ring 43. The outer side wall of the guide plate 4 has a third reinforcing ring 44. The first reinforcing ring 42 is fixedly connected to the second reinforcing ring 43 and the third reinforcing ring 44. The first reinforcing ring 42, the second reinforcing ring 43 and the third reinforcing ring 44 are all protruding towards the side of the guide plate 4 located downstream of the water flow. The other side of the guide plate 4 located upstream of the water flow is flat. In actual production, the number of guide holes 41 can be twelve or twenty-eight.

[0037] like Figure 6 , Figure 7 As shown, the volute 2 has a return channel 22 that connects the inlet chamber 131 and the outlet chamber 132. A return valve 5 is installed in the return channel 22. The pump body 1 has a locking channel 15. The inner end of the locking channel 15 is connected to the outlet chamber 132, and the outer end passes through the pump body 1 and is sealed by the first plug 6. A locking rod 7 is installed in the locking channel 15. The locking rod 7 is located downstream of the guide plate 4.

[0038] The inner end of the locking rod 7 has a locking part 71 that contacts the valve core 51 of the return valve 5. Specifically, as shown in the figure... Figure 8 As shown, the locking part 71 has a normally closed surface 711 that protrudes in an arc shape and a normally open surface 712 that is recessed in an arc shape on its circumferential outer wall. The normally closed surface 711 and the normally open surface 712 are arranged adjacent to each other, and the connection between the normally closed surface 711 and the normally open surface 712 is smoothly transitioned. Figure 9 As shown, the inner wall of the locking channel 15 has an arc-shaped limiting groove 151. The bottom of the limiting groove 151 is raised in the middle and recessed at both ends. The outer end of the locking rod 7 has a protruding limiting part 72, which rotates along the limiting groove 151. The valve core 51 includes a protruding abutment part 511. Rotating the locking rod 7 causes the locking part 71 and the limiting part 72 to rotate, so that the limiting part 72 is partially embedded and positioned in one end of the limiting groove 151, and the abutment part 511 abuts against the normally closed surface 711. At this time, the return valve 5 is in a normally closed state. Rotating the locking rod 7 causes the locking part 71 and the limiting part 72 to rotate, so that the limiting part 72 is partially embedded and positioned in the other end of the limiting groove 151, and the abutment part 511 abuts against the normally open surface 712. At this time, the return valve 5 is in a normally open state.

[0039] When the return valve 5 is in the normally open state, the water pump starts and the impeller rotates. Water enters the inlet chamber 131 from the inlet 11, then flows into the upstream outlet chamber 132 through the guide channel 3, and then flows into the downstream outlet chamber 132 through the guide hole 41. Some water flows back into the inlet chamber 131 through the return valve 5 and the return channel 22, and the rest of the water is discharged through the outlet 12.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0041] Although this article uses a lot of terms such as pump body 1, inlet 11, outlet 12, pump chamber 13, inlet chamber 131, outlet chamber 132, first positioning groove 14, locking channel 15, limiting groove 151, water injection channel 16, volute 2, second positioning groove 21, return channel 22, guide channel 3, guide strip 31, guide plate 4, guide hole 41, first reinforcing ring 42, second reinforcing ring 43, third reinforcing ring 44, first positioning post 45, second positioning post 46, return valve 5, valve core 51, abutment part 511, first plug 6, locking rod 7, locking part 71, normally closed surface 711, normally open surface 712, limiting part 72, first check valve 8, second check valve 9, filter element 10, and second plug 101, the possibility of using other terms cannot be ruled out. The use of these terms is merely for the convenience of describing and explaining the nature of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A water pump comprising a pump body (1) having an inlet (11), an outlet (12), and a pump chamber (13), wherein the pump chamber (13) has a volute (2) dividing the pump chamber (13) into an inlet chamber (131) communicating with the inlet (11) and an outlet chamber (132) communicating with the outlet (12), characterized in that, The outlet chamber (132) surrounds the circumferential outer side of the inlet chamber (131). One end of the outlet chamber (132) is connected to the inlet chamber (131) through several spaced-apart guide channels (3). All the guide channels (3) form a ring. A ring-shaped guide plate (4) is fixedly connected in the outlet chamber (132). The guide plate (4) is located between the guide channels (3) and the outlet (12). Several through guide holes (41) are spaced-apart in the guide plate (4). The pump body (1) has several arc-shaped and protruding guide strips (31). Two adjacent guide strips... The flow bar (31) forms the flow channel (3). The inner end of the flow bar (31) is located at the edge of the water inlet cavity (131). The outer end of the flow bar (31) extends to the outer side of the inner end of the adjacent flow bar (31). The flow hole (41) is circular. The edge of the flow hole (41) has a first reinforcing ring (42). The inner sidewall of the flow plate (4) has a second reinforcing ring (43). The outer sidewall of the flow plate (4) has a third reinforcing ring (44). The first reinforcing ring (42) is fixedly connected to the second reinforcing ring (43) and the third reinforcing ring (44). The volute (2) The pump body (1) has a return channel (22) connecting the inlet chamber (131) and the outlet chamber (132). A return valve (5) is installed in the return channel (22). The pump body (1) has a locking channel (15). The inner end of the locking channel (15) is connected to the outlet chamber (132), and the outer end passes through the pump body (1) and is sealed by a first plug (6). A locking rod (7) is installed in the locking channel (15). The locking rod (7) is located downstream of the guide plate (4). The inner end of the locking rod (7) has a locking part (71) that contacts the valve core (51) of the return valve (5). (7) Rotating the locking part (71) drives the valve core (51) to move so that the return valve (5) is in a normally open or normally closed state. The locking part (71) has a normally closed surface (711) that is arc-shaped protruding and a normally open surface (712) that is arc-shaped recessed on its circumferential outer wall. The normally closed surface (711) and the normally open surface (712) are arranged adjacent to each other and the connection between the normally closed surface (711) and the normally open surface (712) is smoothly transitioned. The valve core (51) includes a protruding abutment part (511) that abuts against the normally closed surface (711) or the normally open surface (712).

2. A water pump according to claim 1, characterized in that, The inner wall of the guide plate (4) is in contact with the volute (2), and the outer wall of the guide plate (4) is in contact with the pump body (1). The first reinforcing ring (42), the second reinforcing ring (43) and the third reinforcing ring (44) are all protruding towards the side of the guide plate (4) located downstream of the water flow, while the other side of the guide plate (4) located upstream of the water flow is flat.

3. A water pump according to claim 1 or 2, characterized in that, The guide plate (4) has several protruding first positioning posts (45) on one side and several protruding second positioning posts (46) on the other side. The pump body (1) has several first positioning grooves (14) and the volute (2) has several second positioning grooves (21). The first positioning posts (45) are embedded in the first positioning grooves (14) and the second positioning posts (46) are embedded in the second positioning grooves (21).

4. A water pump according to claim 1 or 2, characterized in that, The inner wall of the locking channel (15) has an arc-shaped limiting groove (151). The bottom of the limiting groove (151) is raised in the middle and recessed at both ends. The outer end of the locking rod (7) has a protruding limiting part (72). The limiting part (72) rotates along the limiting groove (151) and can be partially embedded and positioned in both ends of the limiting groove (151).

5. A water pump according to claim 1 or 2, characterized in that, The inlet (11) is provided with a first one-way valve (8) that allows water to flow from the inlet (11) to the inlet chamber (131), and the outlet (12) is provided with a second one-way valve (9) that allows water to flow from the outlet chamber (132) to the outlet (12).

6. A water pump according to claim 1 or 2, characterized in that, The pump body (1) has a water injection channel (16) and a filter element (10) fixed in the water injection channel (16). The inner end of the water injection channel (16) is connected to the water inlet (11) and the water inlet cavity (131), and the outer end penetrates the pump body (1) and is sealed by the second plug (101). The filter element (10) is located between the water inlet (11) and the water inlet cavity (131).

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