A water pump structure with fast suction stroke

Abstract

The present invention discloses a water pump structure with fast suction stroke, which aims to solve the problem that the air in the water pump cannot be discharged in time, resulting in slow suction stroke speed and poor suction stroke height. The invention includes a pump body, an impeller installed in the pump body, a water inlet and a water outlet are provided on the pump body, a reflux valve assembly is installed on the front side of the impeller, a water-gas separation disk is installed on the rear side of the impeller, a plurality of through holes are provided circumferentially on the water-gas separation disk, the water outlet is connected to the through holes, a reflux channel is provided in the pump body, one end of the reflux channel is connected to the reflux valve assembly, and the other end of the reflux channel is connected to the through holes on the lower side of the water-gas separation disk; a sealing seat is provided in the pump body, a flow hole is provided on the sealing seat, the reflux valve assembly includes a valve seat, a positioning spring is installed between the valve seat and the sealing seat, a gap is provided between the valve seat and the flow hole, and the valve seat can be moved to seal and cover the flow hole. This water pump structure with fast suction stroke can realize the rapid separation of the water-gas mixture in the pump chamber, ensure the suction stroke height, and fast suction stroke.

Description

Technical Field

[0001] The present invention relates to a water pump, and more particularly to a water pump structure with fast suction stroke. Background Art

[0002] A centrifugal pump is a commonly used water pump. Before starting, it must be filled with water to expel air from the pump chamber. When the centrifugal pump is operating, the impeller rotates, and water is thrown to the edge of the impeller by centrifugal force. This creates a negative pressure at the center of the impeller, drawing water in and achieving the pumping function. When the pump first starts operating, the water in the pump chamber is a mixture of water and air, and the volume of water in the entire pump chamber remains constant. This is primarily because there is no water being drawn in at the pump inlet, and no water being discharged at the pump outlet. This results in insufficient outlet pressure and a lack of water intake, preventing the water from being discharged from the pump chamber. This directly affects the pump's suction height and duration. If air is drawn into the water inlet during operation, the density of air is lower than that of water, and the centrifugal force generated by the air is lower than that of water. This air accumulates at the center of the impeller, obstructing water flow and reducing the suction height. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a water pump structure with fast suction stroke, which can realize the rapid separation of the water-gas mixture in the pump cavity, ensure the high suction stroke and fast suction stroke.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a water pump structure with a fast suction stroke, including a pump body, an impeller installed in the pump body, a water inlet and a water outlet on the pump body, a reflux valve assembly installed on the front side of the impeller, a water-gas separation disk installed on the rear side of the impeller, a plurality of through holes are circumferentially provided on the water-gas separation disk, the water outlet is connected to the through holes, a reflux channel is provided in the pump body, one end of the reflux channel is connected to the reflux valve assembly, and the other end of the reflux channel is connected to the through hole on the lower side of the water-gas separation disk; a sealing seat is provided in the pump body, a flow hole is provided on the sealing seat, the reflux valve assembly includes a valve seat, a positioning spring is installed between the valve seat and the sealing seat, a gap is provided between the valve seat and the flow hole, and the valve seat can be moved to seal and cover the flow hole.

[0005] When the pump first starts operating, the water in the pump chamber is a mixture of water and air. The outlet pressure is insufficient, and the water intake volume cannot guarantee the water flow out of the pump chamber. No water is drawn into the pump inlet, and no water is discharged from the pump outlet. The impeller rotates, transporting the water-air mixture from front to back in the pump chamber. This mixture is blocked by the water-air separator disc. Because water is denser than air and heavier, gravity exerts a downward force on it, causing it to flow through the holes on the underside of the separator disc into the return flow channel. The water in the return flow channel flows through the gap between the valve seat and the flow hole, then flows to the front of the impeller, where it is drawn in again, continuing the cycle. Air, being lighter, is blocked by the water-air separator disc. It then flows through the holes on the upper side of the disc toward the outlet, where it is discharged. This water-air mixture circulates within the pump chamber, continuously discharging air from the pump chamber and the inlet piping, accelerating the exhaust of air and, consequently, the suction stroke. As the gas in the pump chamber gradually decreases and the water pressure gradually increases, the valve seat is compressed and the valve seat seal closes the flow hole, cutting off the internal circulation and ensuring the suction height.

[0006] This water pump structure with fast suction stroke can realize the rapid separation of water-gas mixture in the pump cavity, ensuring high suction stroke and fast suction stroke.

[0007] Preferably, a valve hole is provided on the valve seat, the valve hole is connected between the return channel and the flow hole, a valve core is installed in the valve hole, a sealing surface is provided on the inner wall of the valve hole, a sealing ring is provided on the valve core, a pre-tightening spring is installed between the valve core and the valve hole, and the sealing ring fits and seals with the sealing surface.

[0008] As the air in the pump chamber gradually decreases and the water pressure gradually increases, the valve seat is compressed, closing the flow hole with the valve seat seal. This pushes the valve core in the valve hole, creating a slight gap between the sealing ring and the sealing surface. This fine gap allows internal circulation within the pump chamber. Because the circulation volume is small, it does not affect the maximum head of the pump. If the valve opening on the flow channel behind the outlet decreases and the inlet pipe leaks, causing air to continuously enter the water inlet, this fine channel allows internal circulation and expel the continuously entering air. This prevents air from remaining in the pump chamber and affecting the suction height, and also prevents noise caused by air entrapment.

[0009] Preferably, the valve seat is provided with a medium inlet and a medium outlet communicated with the valve hole, the medium inlet is communicated with the reflux channel correspondingly, and the medium outlet is communicated with the through-flow hole correspondingly.

[0010] The arrangement of the medium inlet and the medium outlet facilitates the circulation of the medium after the valve core is opened.

[0011] Preferably, a positioning hole is provided in the pump body, a positioning column is provided on the valve seat, and the positioning column is movably plug-in connected to the positioning hole.

[0012] The setting of the positioning column and positioning hole makes the movement of the valve seat more stable and reliable, avoiding shaking and noise.

[0013] Preferably, a flow groove is provided on the outer wall between one end of the valve core and the sealing ring.

[0014] The through-flow groove ensures the reliable flow of the medium in the valve hole.

[0015] Preferably, an inner sealing ring is sleeved on the valve core, and the inner sealing ring is placed between the sealing surface and the sealing ring.

[0016] The provision of the inner sealing ring improves the sealing performance after the sealing ring is fitted to the sealing surface.

[0017] Preferably, the valve hole includes a large diameter section and a small diameter section, the sealing surface is arranged between the large diameter section and the small diameter section, the sealing surface is arranged at an angle, there is an arc transition between the sealing surface and the end of the small diameter section, and the sealing ring is arranged close to the large diameter section.

[0018] The sealing ring is attached to the sealing surface between the large diameter section and the small diameter section, and has a good sealing effect. After the sealing ring is separated from the sealing surface, there is a gap between the inner wall of the large diameter section and the outer wall of the sealing ring, which is convenient for the flow of medium.

[0019] Preferably, a flange is provided on the valve seat, and an outer sealing ring for sealing the opening end of the through hole is mounted on the valve seat. The outer sealing ring is placed between the flange and the through hole, and the outer diameter of the flange is larger than the diameter of the through hole.

[0020] The flange plays a good positioning role in the process of the valve seat covering the flow hole, and the outer sealing ring improves the sealing performance of the valve seat covering the flow hole.

[0021] Preferably, a mounting tube extending toward the front side of the impeller is provided at the edge of the water-gas separation disk, and the impeller is adapted to be installed in the mounting tube. A reflux groove is provided on the inner wall of the mounting tube, and a first flow channel is formed between the reflux groove and the outer wall of the impeller. A second flow channel is provided on the front side of the impeller in the pump body, and the second flow channel is connected between the first flow channel and the reflux valve assembly. The first flow channel and the second flow channel together constitute a reflux channel.

[0022] The installation cylinder is used for installing and arranging the impeller, and the reflux groove provided in the installation cylinder is used for forming a reflux channel, which makes the reflux channel easy to arrange.

[0023] Preferably, a water inlet cylinder is provided on the front side of the impeller in the pump body, a water inlet ring is provided on the front side of the impeller, the water inlet ring is sealed and sleeved in the water inlet cylinder, and the flow hole opening is arranged toward the water inlet ring.

[0024] The impeller is fed with water through the water inlet ring, which is installed in the water inlet cylinder. The through hole is set towards the water inlet ring, so that the water returning from the through hole can be sucked into the impeller in time, which is conducive to improving the suction speed.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) the water pump structure of the present application can realize the rapid separation of the water-gas mixture in the pump chamber, ensuring the suction height and rapid suction speed; (2) the air mixed in during the normal water pumping process of the water pump can be discharged in time, avoiding the air remaining in the pump chamber and affecting the suction height, and avoiding the noise caused by the residual air. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a cross-sectional view of the present invention;

[0027] Figure 2 It is a partial enlarged schematic diagram of the position of the reflux valve assembly of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the water-gas separation disk of the present invention;

[0029] In the figure: 1. pump body, 2. impeller, 3. water inlet, 4. water outlet, 5. reflux valve assembly, 6. water-gas separation disc, 7. through hole, 8. sealing seat, 9. flow hole, 10. valve seat, 11. positioning spring, 12. flange, 13. outer sealing ring, 14. valve hole, 15. valve core, 16. sealing surface, 17. sealing ring, 18. pre-tightening spring, 19. flow groove, 20. medium inlet, 21. medium outlet, 22. inner sealing ring, 23. spring seat, 24. positioning hole, 25. positioning column, 26. mounting seat, 27. mounting cylinder, 28. reflux groove, 29. first flow channel, 30. second flow channel, 31. water inlet cylinder, 32. water inlet ring, 33. motor frame, 34. motor, 35. end cover, 36. waterproof sleeve, 37. water outlet channel. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0031] Example: A water pump structure with fast suction stroke (see attached Figure 1 To the attached Figure 3), including a pump body 1, an impeller 2 installed in the pump body, a water inlet 3 and a water outlet 4 are provided on the pump body, the water inlet and the water outlet are respectively arranged at the upper positions of the front and rear ends of the pump body, a reflux valve assembly 5 is installed on the front side of the impeller, and a water-gas separation disk 6 is installed on the rear side of the impeller. A plurality of through holes 7 are circumferentially provided on the water-gas separation disk, the through holes are arranged close to the edge of the water-gas separation disk, a water outlet channel is arranged in the middle position of the rear side of the impeller, the water outlet channel is arranged toward the water-gas separation disk, the water outlet is connected with the through holes, a reflux channel is provided in the pump body, one end of the reflux channel is connected with the reflux valve assembly, and the other end of the reflux channel is connected to the through hole on the lower side of the water-gas separation disk; a sealing seat 8 is provided in the pump body, and a through hole 9 is provided on the sealing seat. The through hole is connected between the reflux channel and the water inlet, the reflux valve assembly includes a valve seat 10, a positioning spring 11 is installed between the valve seat and the sealing seat, a gap is provided between the valve seat and the through hole, and the valve seat can move to seal and cover the through hole. A flange 12 is provided on the valve seat, and an outer sealing ring 13 is mounted on the valve seat for sealing the opening end of the through hole. The outer sealing ring is placed between the flange and the through hole, and the outer diameter of the flange is larger than the diameter of the through hole.

[0032] A valve hole 14 is provided on the valve seat, which is connected between the reflux channel and the through-flow hole. A valve core 15 is installed in the valve hole, a sealing surface 16 is provided on the inner wall of the valve hole, a sealing ring 17 is provided on the valve core, a preload spring 18 is installed between the valve core and the valve hole, and the sealing ring is in close contact with the sealing surface for sealing. A flow groove 19 is provided on the outer wall between one end of the valve core and the sealing ring. A medium inlet 20 and a medium outlet 21 are provided on the valve seat, which are connected to the valve hole. The medium inlet is connected to the reflux channel, and the medium outlet is connected to the through-flow hole. An inner sealing ring 22 is mounted on the valve core, and the inner sealing ring is placed between the sealing surface and the sealing ring. The valve hole includes a large diameter section and a small diameter section. The sealing surface is provided between the large diameter section and the small diameter section. The sealing surface is provided at an angle, and a circular arc transition is formed between the sealing surface and the end of the small diameter section. The sealing ring is provided close to the large diameter section.

[0033] The valve hole extends through both ends of the valve seat. One end of the hole is connected to a spring seat 23, which has a socket through which the valve core passes. The preload spring abuts against the spring seat. A positioning hole 24 is provided in the pump body, and a positioning post 25 is provided on the valve seat. The post is movably connected to the positioning hole. A mounting seat 26 is sealed on the pump body, and the positioning hole is provided on the mounting seat.

[0034] The edge of the water-gas separation disc is equipped with a mounting tube 27 extending toward the front of the impeller. The impeller fits within the mounting tube, and a return groove 28 is provided on the inner wall of the mounting tube. A first flow channel 29 is formed between the return groove and the outer wall of the impeller. A second flow channel 30 is provided in the pump body in front of the impeller. The second flow channel connects the first flow channel and the return valve assembly. Together, the first and second flow channels form a return channel. A water inlet tube 31 is provided in the pump body in front of the impeller, and a water inlet ring 32 is provided in front of the impeller. The water inlet ring seal is mounted within the water inlet tube, with the flow hole opening facing the water inlet ring.

[0035] The rear side of the water-gas separation disk is fastened to the motor frame 33, a motor 34 is installed in the motor frame, the motor output shaft is connected to the impeller, the rear end of the motor frame is connected to the end cover 35, the outside of the motor frame is connected to the waterproof sleeve 36, the front end of the waterproof sleeve is tightly fitted on the outer wall of the mounting tube, and the rear end of the waterproof sleeve is tightly fitted on the outer wall of the end cover. A water outlet channel 37 is provided between the motor frame and the inner wall of the waterproof sleeve, the through hole on the gas separation disk is connected to the front end of the water outlet channel, and the water outlet is connected to the rear end of the water outlet channel.

[0036] When the pump first starts operating, the water in the pump chamber is a mixture of water and air. The outlet pressure is insufficient, and the water intake volume cannot guarantee the water flow out of the pump chamber. No water is drawn into the pump inlet, and no water is discharged from the pump outlet. The impeller rotates, transporting the water-air mixture from front to back in the pump chamber. This mixture is blocked by the water-air separator disc. Because water is denser than air and heavier, gravity exerts a downward force on it, causing it to flow through the holes on the underside of the separator disc into the return flow channel. The water in the return flow channel flows through the gap between the valve seat and the flow hole, then flows to the front of the impeller, where it is drawn in again, continuing the cycle. Air, being lighter, is blocked by the water-air separator disc. It then flows through the holes on the upper side of the disc toward the outlet, where it is discharged. This water-air mixture circulates within the pump chamber, continuously discharging air from the pump chamber and the inlet piping, accelerating the exhaust of air and, consequently, the suction stroke. As the gas in the pump chamber gradually decreases and the water pressure gradually increases, the valve seat is compressed and the valve seat seal closes the flow hole, cutting off the internal circulation and ensuring the suction height.

[0037] As the air in the pump chamber gradually decreases and the water pressure gradually increases, the valve seat is compressed, closing the flow hole with the valve seat seal. This pushes the valve core in the valve hole, creating a slight gap between the sealing ring and the sealing surface. This fine gap allows internal circulation within the pump chamber. Because the circulation volume is small, it does not affect the maximum head of the pump. If the valve opening on the flow channel behind the outlet decreases and the inlet pipe leaks, causing air to continuously enter the water inlet, this fine channel allows internal circulation and expel the continuously entering air. This prevents air from remaining in the pump chamber and affecting the suction height, and also prevents noise caused by air entrapment.

[0038] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A water pump structure with a fast suction stroke, comprising a pump body, an impeller installed in the pump body, and a water inlet and a water outlet provided on the pump body, characterized in that: A reflux valve assembly is installed on the front side of the impeller, and a water-gas separation disk is installed on the rear side of the impeller. The water-gas separation disk is provided with several through holes on the circumference, and the water outlet is connected to the through holes. A reflux channel is provided in the pump body, one end of the reflux channel is connected to the reflux valve assembly, and the other end of the reflux channel is connected to the through hole on the lower side of the water-gas separation disk; a sealing seat is provided in the pump body, and a through hole is provided on the sealing seat. The reflux valve assembly includes a valve seat, a positioning spring is installed between the valve seat and the sealing seat, a gap is provided between the valve seat and the through hole, and the valve seat can move to seal and cover the through hole; a valve hole is provided on the valve seat, and a sealing surface is provided on the inner wall of the valve hole; a positioning hole is provided in the pump body, and a positioning post is provided on the valve seat, which is movably plug-in connected to the positioning hole; the valve hole includes a large diameter section and a small diameter section, and the sealing surface is arranged between the large diameter section and the small diameter section, and the sealing surface is inclined; a flange is provided on the valve seat, and an outer sealing ring is mounted on the valve seat for sealing the opening end of the through hole, and the outer sealing ring is placed between the flange and the through hole.

2. A water pump structure with fast suction stroke according to claim 1, characterized in that: The valve hole is connected between the reflux channel and the through-flow hole. A valve core is installed in the valve hole. A sealing ring is provided on the valve core. A pre-tightening spring is installed between the valve core and the valve hole. The sealing ring fits and seals the sealing surface.

3. A water pump structure with fast suction stroke according to claim 2, characterized in that: The valve seat is provided with a medium inlet and a medium outlet which are communicated with the valve hole. The medium inlet is communicated with the reflux channel correspondingly, and the medium outlet is communicated with the through-flow hole correspondingly.

4. A water pump structure with fast suction stroke according to claim 2, characterized in that: A through-flow groove is provided on the outer wall between one end of the valve core and the sealing ring.

5. A water pump structure with fast suction stroke according to claim 2, characterized in that: An inner sealing ring is sleeved on the valve core and is placed between the sealing surface and the sealing ring.

6. A water pump structure with fast suction stroke according to claim 2, characterized in that: There is an arc transition between the sealing surface and the end of the small diameter section, and the sealing ring is arranged close to the large diameter section.

7. A water pump structure with fast suction stroke according to claim 1, characterized in that: The outer diameter of the flange is larger than the diameter of the through-hole.

8. A water pump structure with fast suction stroke according to any one of claims 1 to 7, characterized in that: The edge of the water-gas separation disk is provided with a mounting cylinder extending toward the front side of the impeller. The impeller is adapted to be installed in the mounting cylinder. A reflux groove is provided on the inner wall of the mounting cylinder. A first flow channel is formed between the reflux groove and the outer wall of the impeller. A second flow channel is provided on the front side of the impeller in the pump body. The second flow channel is connected between the first flow channel and the reflux valve assembly. The first flow channel and the second flow channel together constitute a reflux channel.

9. A water pump structure with fast suction stroke according to any one of claims 1 to 7, characterized in that: A water inlet cylinder is provided on the front side of the impeller in the pump body, a water inlet ring is provided on the front side of the impeller, the water inlet ring is sealed and sleeved in the water inlet cylinder, and the through hole opening is arranged toward the water inlet ring.

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