Locking structure for self-priming water pump
By designing a locking structure to control the normally open or normally closed state of the reflux valve, the problems of high noise and poor versatility of self-priming centrifugal pumps are solved, achieving flexible function adjustment and quiet operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIZHOU HAPPY WATER PUMP
- Filing Date
- 2023-04-04
- Publication Date
- 2026-07-21
AI Technical Summary
The existing self-priming centrifugal pumps have a normally open reflux valve, which results in high noise levels. Furthermore, their functional requirements vary in different installation environments, making them lack versatility.
Design a self-priming locking structure for a water pump. Control the normally open or normally closed state of the return valve through a locking rod. Utilize the locking part of the locking rod and the cooperation of the valve core to achieve flexible adjustment of the return valve.
When the self-priming function is needed, the return valve is normally open to reduce noise; when the self-priming function is not needed, the return valve is normally closed to improve the versatility and quietness of the water pump.
Smart Images
Figure CN116292380B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of water pump technology and relates to a locking structure for self-priming water pumps. 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 self-priming centrifugal pump, when the pump is first started, water enters the volute through the inlet. The impeller rotates rapidly, drawing the water into the pump chamber outside the volute through the spray nozzle. Because a return valve is connected to the bottom of the volute, the water in the pump chamber is returned to the volute through the outlet of the return valve, allowing for faster water intake and better pump start-up. However, in this type of self-priming centrifugal pump, the return valve remains open, causing water to continuously flow from the pump chamber outside the volute through the return valve to the pump chamber inside the volute, generating significant noise. Furthermore, the installation environment of the self-priming centrifugal pump presents various challenges, as different installation environments require different pump functions. Summary of the Invention
[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a self-priming locking structure for a water pump, and to solve the technical problem of how to enable the return valve to be in both normally open and normally closed states.
[0006] The objective of this invention can be achieved through the following technical solution: a self-priming locking structure for a water pump, the 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 connected to the inlet and an outlet chamber connected to the outlet, and a return valve for allowing water to flow from the outlet chamber to the inlet chamber is installed in the volute, characterized in that the locking structure comprises a locking channel and a locking rod passing through the locking channel, the inner end of the locking channel being connected to the outlet chamber, the outer end of the locking channel penetrating the pump body and being sealed by a plug, the inner end of the locking rod having a locking part contacting the valve core of the return valve, the locking rod rotating to drive the valve core to move through the locking part, thereby placing the return valve in a normally open or normally closed state.
[0007] When this water pump requires self-priming, the locking lever rotates, causing the valve core to move via the locking part, keeping the return valve normally open. This allows water in the outlet chamber to flow back into the inlet chamber, improving pump startup. When self-priming is not required, the locking lever rotates, causing the valve core to move via the locking part, keeping the return valve normally closed. This prevents water in the outlet chamber from flowing back into the inlet chamber, reducing pump noise. The normally open or normally closed state of the return valve can be selected depending on the water circuit environment in which the pump is installed, improving the pump's versatility. Adjustment is simple: just unscrew the plug and rotate the locking lever to move the valve core via the locking part. After adjustment, tighten the plug to position the locking lever in the locking channel.
[0008] In the aforementioned self-priming locking structure for a water pump, the outer circumferential 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 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; when the abutment part abuts against the normally open surface, the return valve is in a conducting state. 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.
[0009] In the aforementioned self-priming locking structure for a water pump, the locking part has a recessed locking groove circumferentially. Both the normally closed and normally open surfaces are located on the groove wall, and the abutment portion is partially embedded in the locking groove. The locking groove provides sufficient space, allowing for better cooperation between the abutment and the locking part, and enabling the locking rod and valve core to better withstand the impact of water flow, thus improving stability.
[0010] In the aforementioned self-priming locking structure for a water pump, the circumferential outer wall at the inner end of the locking part is inclined inwards along the direction from the outer end of the locking channel towards the inner end. This structure reduces the impact of water flow on the locking rod and improves the stability of the locking rod.
[0011] In the aforementioned self-priming locking structure for a water pump, the inner wall of the locking channel has an arc-shaped positioning groove. The bottom of the positioning groove is convex in the middle and recessed at both ends. The outer end of the locking rod has a protruding positioning part. The positioning part rotates along the positioning groove and can be partially embedded in both ends of the positioning groove. The rotation of the positioning part along the positioning groove causes the locking rod to rotate in a set direction. The convex bottom of the positioning groove, combined with the plug, allows the positioning part to be partially embedded in both ends of the positioning groove, thus locking the locking rod. The locking structure is simple and improves the stability of the locking rod, thereby improving the stability of the return valve. When the positioning part is embedded in one end of the positioning groove, the return valve is normally open; when the positioning part is embedded in the other end of the positioning groove, the return valve is normally closed.
[0012] In the aforementioned self-priming locking structure for a water pump, the positioning part has an internal hexagonal actuating groove, and the axis of the locking rod passes through the center of the actuating groove. The locking rod can be rotated easily by inserting an internal hexagonal wrench into the actuating groove.
[0013] In the aforementioned self-priming locking structure for a water pump, the inner wall of the locking channel has an annular stepped surface, and the outer circumferential wall of the locking rod has an abutment surface. The plug presses the locking rod so that the abutment surface is pressed against the stepped surface. This structure allows the locking rod to be axially positioned in the locking channel, resulting in a simple structure. Furthermore, after unscrewing the plug, the resistance to rotation of the locking rod is low, making rotation convenient.
[0014] In the aforementioned self-priming locking structure for a water pump, the locking rod further includes a rod body located in the middle, the cross-section of which is cross-shaped, and the abutment surface is located at the end of the rod body near the plug.
[0015] In the aforementioned self-priming locking structure for a water pump, the axial direction of the locking rod is perpendicular to the moving direction of the return valve core. This design is convenient to adjust and rationally designed.
[0016] In the aforementioned self-priming locking structure of a water pump, the volute has a return channel connecting the inlet chamber and the outlet chamber. The return valve is installed in the return channel and includes a sealing ring and a spring. The valve core also includes a core body and several protruding limiting hooks. The abutment and the limiting hooks are located at both ends of the core body. The sealing ring is sleeved and fixed outside the core body. Under the action of the spring force, the valve core moves toward the locking rod, connecting the inlet chamber and the outlet chamber through the return channel. When the valve core moves a set distance toward the locking rod, the limiting hooks hook onto the volute. The locking rod rotates and pushes the valve core to move through the locking part, causing the sealing ring to abut against the channel wall of the return channel, thus cutting off the return channel.
[0017] Compared with the prior art, the self-priming locking structure of the water pump provided by the present invention has the following advantages:
[0018] 1. This locking structure can control the position of the valve core through the locking rod, so that the return valve can be in a normally closed or normally open state. When in the normally closed state, it can reduce noise, and when in the normally open state, it can make the water pump start better. Users can choose according to actual needs, which has good versatility.
[0019] 2. The inner end of the locking rod of this locking structure has a locking part, which has a normally closed surface and a normally open surface in a wave shape. The locking rod can change the position of the valve core by rotating through the normally closed surface and the normally open surface, thereby adjusting the return valve to be in the normally open or normally closed state, which is convenient for adjustment. Attached Figure Description
[0020] Figure 1 This is a cross-sectional view of the water pump.
[0021] Figure 2 This is a schematic diagram of the return valve of this water pump in the normally closed state.
[0022] Figure 3 This is a schematic diagram of the return valve of this water pump in the normally open state.
[0023] Figure 4 This is a schematic diagram of the overall structure of the locking rod of this locking mechanism.
[0024] Figure 5 This is a schematic diagram of the mating structure of the positioning part and the positioning groove of the locking structure.
[0025] In the diagram, 1. Pump body; 11. Inlet; 12. Outlet; 13. Pump chamber; 131. Inlet chamber; 132. Outlet chamber; 2. Volute; 21. Return channel; 3. Return valve; 31. Valve core; 311. Abutment part; 312. Core body; 313. Limit hook; 32. Sealing ring; 33. Spring; 4. Locking channel; 41. Positioning groove; 42. Stepped surface; 5. Locking rod; 51. Locking part; 511. Normally closed surface; 512. Normally open surface; 513. Locking groove; 52. Positioning part; 521. Actuating groove; 53. Rod body; 531. Abutment surface; 6. Plug. Detailed Implementation
[0026] 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.
[0027] like Figure 1 As shown, the water pump includes a pump body 1, a volute 2, a return valve 3, and a locking structure. The locking structure for the self-priming water pump includes a locking channel 4, a locking rod 5, and a plug 6.
[0028] The pump body 1 has an inlet 11, an outlet 12 and a pump chamber 13. 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 impeller is installed in the inlet chamber 131. The volute 2 has a return channel 21 that connects the inlet chamber 131 and the outlet chamber 132. The return valve 3 is installed in the return channel 21. The return valve 3 allows water to flow from the outlet chamber 132 to the inlet chamber 131.
[0029] The reflux valve 3 includes a valve core 31, a sealing ring 32, and a spring 33. The valve core 31 includes a stop portion 311, a core body 312, and a limiting hook 313. The stop portion 311, the core body 312, and the limiting hook 313 are an integral structure. The stop portion 311 and the limiting hook 313 protrude from both ends of the core body 312. In this embodiment, there are two limiting hooks 313. In actual production, there can be three or four limiting hooks 313. The sealing ring 32 is sleeved and fixed outside the core body 312. The spring 33 is a cylindrical spring. The spring 33 is sleeved outside the valve core 31, with one end of the spring 33 acting on the volute 2 and the other end acting on the valve core 31.
[0030] like Figure 2 , Figure 3 As shown, the inner end of the locking channel 4 is connected to the outlet chamber 132, and the outer end penetrates the pump body 1 and is sealed by the plug 6. The locking rod 5 passes through the locking channel 4, and the axial direction of the locking rod 5 is perpendicular to the moving direction of the valve core 31 of the return valve 3. Figure 4As shown, the locking rod 5 includes a locking part 51 located at the inner end, a rod body 53 located in the middle, and a positioning part 52 located at the outer end and protruding therefrom. The locking part 51, the rod body 53 and the positioning part 52 are an integral structure.
[0031] The locking part 51 has a recessed locking groove 513 in its circumferential direction. The groove wall of the locking groove 513 has a normally closed surface 511 that is arc-shaped and protruding, and a normally open surface 512 that is arc-shaped and recessed. The normally closed surface 511 and the normally open surface 512 are arranged adjacent to each other, and the connection between the normally closed surface 511 and the normally open surface 512 is smoothly transitioned. The abutment part 311 is partially embedded in the locking groove 513 and abuts against the normally closed surface 511 or the normally open surface 512. The circumferential outer wall at the inner end of the locking part 51 is inclined inward along the direction from the outer end of the locking channel 4 toward the inner end.
[0032] like Figure 5 As shown, the inner wall of the locking channel 4 has an arc-shaped positioning groove 41. The bottom of the positioning groove 41 is raised in the middle and recessed at both ends. The positioning part 52 is partially embedded in the positioning groove 41. The positioning part 52 rotates along the positioning groove 41. When the positioning part 52 is partially embedded at both ends of the positioning groove 41, the plug 6 is tightened to fix the locking rod 5 in the pump body 1. The positioning part 52 has an internal hexagonal lever groove 521, and the axis of the locking rod 5 passes through the center of the lever groove 521.
[0033] The inner wall of the locking channel 4 has an annular stepped surface 42, the cross section of the rod 53 is cross-shaped, and the outer circumferential wall of the locking rod 5 has an abutment surface 531. The abutment surface 531 is located at the end of the rod 53 near the plug 6. The plug 6 presses the locking rod 5 so that the abutment surface 531 is pressed against the stepped surface 42.
[0034] When the self-priming function of this water pump is required, unscrew the plug 6 and turn the locking rod 5 with an Allen wrench to partially insert the positioning part 52 into one end of the positioning groove 41. At this time, the abutment part 311 abuts against the normally open surface 512 under the action of the spring 33, and the return valve 3 is in the normally open state. The return channel 21 connects the inlet chamber 131 and the outlet chamber 132. Finally, tighten the plug 6. When the self-priming function of this water pump is not required, unscrew the plug 6 and turn the locking rod 5 with an Allen wrench to partially insert the positioning part 52 into the other end of the positioning groove 41. At this time, the abutment part 311 abuts against the normally closed surface 511 under the action of the spring 33, and the sealing ring 32 abuts against the channel wall of the return channel 21. The return valve 3 is in the normally closed state, and the return channel 21 cuts off the inlet chamber 131 and the outlet chamber 132. Finally, tighten the plug 6.
[0035] 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.
[0036] Although this document frequently uses terms such as pump body 1, inlet 11, outlet 12, pump chamber 13, inlet chamber 131, outlet chamber 132, volute 2, return channel 21, return valve 3, valve core 31, abutment part 311, core body 312, limit hook 313, sealing ring 32, spring 33, locking channel 4, positioning groove 41, stepped surface 42, locking rod 5, locking part 51, normally closed surface 511, normally open surface 512, locking groove 513, positioning part 52, lever groove 521, rod body 53, abutment surface 531, and plug 6, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.
Claims
1. A self-priming locking structure for a water pump, the 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), the 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), wherein a return valve (3) is installed in the volute (2) to allow water to flow from the outlet chamber (132) to the inlet chamber (131), characterized in that, The locking structure includes a locking channel (4) and a locking rod (5) passing through the locking channel (4). The inner end of the locking channel (4) is connected to the water outlet chamber (132), and the outer end passes through the pump body (1) and is sealed by a plug (6). The inner end of the locking rod (5) has a locking part (51) that contacts the valve core (31) of the return valve (3). The locking rod (5) rotates and drives the valve core (31) to move through the locking part (51), so that the return valve (3) is in a normally open or normally closed state. The circumferential outer wall of the locking part (51) has a normally closed surface (511) that is arc-shaped protruding and an arc-shaped concave surface. The valve core (31) has a normally open surface (512), and the normally closed surface (511) and the normally open surface (512) are arranged adjacent to each other and the connection between the normally closed surface (511) and the normally open surface (512) is smoothly transitioned. The valve core (31) includes a protruding abutment (311) that abuts against the normally closed surface (511) or the normally open surface (512). The locking part (51) has a recessed locking groove (513) in the circumferential direction. The normally closed surface (511) and the normally open surface (512) are both located on the groove wall of the locking groove (513). The abutment (311) is partially embedded in the locking groove (513).
2. The locking structure for a self-priming water pump according to claim 1, characterized in that, The outer circumferential wall of the locking part (51) at the inner end is inclined inward along the outer end of the locking channel (4) toward the inner end.
3. A locking structure for a self-priming water pump according to claim 1 or 2, characterized in that, The inner wall of the locking channel (4) has an arc-shaped positioning groove (41). The bottom of the positioning groove (41) is raised in the middle and recessed at both ends. The outer end of the locking rod (5) has a protruding positioning part (52). The positioning part (52) rotates along the positioning groove (41) and can be partially embedded in the two ends of the positioning groove (41).
4. The locking structure for a self-priming water pump according to claim 3, characterized in that, The positioning part (52) has an internal hexagonal lever groove (521), and the axis of the locking rod (5) passes through the center of the lever groove (521).
5. A locking structure for a self-priming water pump according to claim 1 or 2, characterized in that, The inner wall of the locking channel (4) has an annular stepped surface (42), and the outer wall of the locking rod (5) has an abutting surface (531). The plug (6) presses the locking rod (5) so that the abutting surface (531) is pressed against the stepped surface (42).
6. The locking structure for a self-priming water pump according to claim 5, characterized in that, The locking rod (5) also includes a rod body (53) located in the middle, the cross section of the rod body (53) is cross-shaped, and the abutment surface (531) is located at the end of the rod body (53) near the plug (6).
7. A locking structure for a self-priming water pump according to claim 1 or 2, characterized in that, The axial direction of the locking rod (5) is perpendicular to the moving direction of the valve core (31) of the return valve (3).
8. A locking structure for a self-priming water pump according to claim 1 or 2, characterized in that, The volute (2) has a return channel (21) connecting the inlet chamber (131) and the outlet chamber (132). The return valve (3) is installed in the return channel (21). The return valve (3) also includes a sealing ring (32) and a spring (33). The valve core (31) also includes a core body (312) and several protruding limiting hooks (313). The abutment part (311) and the limiting hooks (313) are located at both ends of the core body (312). The sealing ring (32) is sleeved and fixed on the core body (312). 2) In addition, the valve core (31) moves toward the locking rod (5) under the action of the spring (33) so that the return channel (21) connects the water inlet chamber (131) and the water outlet chamber (132). When the valve core (31) moves toward the locking rod (5) by a set distance, the limiting hook (313) hooks onto the volute (2). The locking rod (5) rotates and pushes the valve core (31) to move through the locking part (51) so that the sealing ring (32) abuts against the channel wall of the return channel (21) so that the return valve (3) cuts off the return channel (21).