WO2023221475A1

WO2023221475A1 - Anti-overflow structure for self-priming pump

Info

Publication number: WO2023221475A1
Application number: PCT/CN2022/138646
Authority: WO
Inventors: 金士海; 颜成刚; 林荣; 林仁勇
Original assignee: 利欧集团浙江泵业有限公司
Priority date: 2022-05-20
Filing date: 2022-12-13
Publication date: 2023-11-23
Also published as: CN115143120B; CN115143120A

Abstract

An anti-overflow structure for a self-priming pump, arranged in a water outlet chamber (7) of a self-priming pump body (1), a partition plate (4) being arranged between a water outlet (5) and a water return port (6) in the self-priming pump body (1), the anti-overflow structure comprising a flow guide plate (11) correspondingly abutting against the partition plate (4), two side edges of the flow guide plate (11) being respectively provided with water baffles (16) correspondingly arranged on two sides of the water outlet (5), retaining plates (20) being arranged on the outer sides of the water baffles (16), a water guide chamber being surrounded by the flow guide plate (11) and the two water baffles (16), a baffle (17) being arranged above the water guide chamber, a water flow-through channel (18) being provided between the baffle (17) and the water baffles (16), a flow splitting plate (23) corresponding to the water return port (6) being arranged on the back side of the flow guide plate (11) facing away from the water guide chamber, and a retaining portion (25) being arranged at the upper end of the baffle (17).

Description

An anti-overflow structure for self-priming pumps

Technical field

The present application relates to the technical field of self-priming pumps, and in particular to an anti-overflow structure for self-priming pumps.

Background technique

The self-priming pump is a self-priming centrifugal pump. There is no need to install a bottom valve in the pipeline. Before working, it is necessary to ensure that there is a certain amount of priming liquid stored in the pump body. Before starting the self-priming pump, fill the pump casing with water. When starting, the impeller The high-speed rotation causes the water in the impeller channel to flow to the volute, and a vacuum is formed at the inlet. The air in the pipe is sucked into the pump body and discharged, and finally the water is diverted from the lower end of the pipe to the pump body.

For example, in Chinese patent documents, the patent number is CN2019217263337, a utility model patent titled "A land-based self-priming pump" published on June 23, 2020. This application discloses a land-based self-priming pump, including a pump body, the top of the pump body is provided with a suction pipe and a discharge pipe, which is characterized in that: the inside of the pump body is provided with a suction chamber, an impeller chamber and a gas-liquid separation chamber connected in sequence; the suction chamber and the suction pipe connected to each other; the impeller chamber is located in the middle and lower part of the inside of the pump body, and an impeller is provided inside the impeller chamber; a guide plate is provided inside the gas-liquid separation chamber, and the guide plate connects the The gas-liquid separation chamber is divided into a first gas-liquid separation chamber and a second gas-liquid separation chamber. The position of the top opening of the first gas-liquid separation chamber is opposite to the position of the discharge pipe. The first gas-liquid separation chamber It communicates with the second gas-liquid separation chamber through the top of the baffle.

The self-priming pump in the prior art has the problem that water will be brought out when exhausting. If too much water is discharged from the pump casing but the air in the pipe has not been completely discharged, the self-priming pump cannot suck out the water in the well. The existing technology Conventional self-priming pumps in China usually only have a suction distance of three to six meters, and cannot be used if it exceeds six meters.

Contents of the invention

Based on the above-mentioned deficiencies in the prior art, the present invention provides an anti-overflow structure for a self-priming pump, which can significantly reduce the amount of water overflow when the self-priming pump is initially used, increase the suction range of the self-priming pump, and improve self-priming. Pump application capabilities.

Another object of the present invention is that the anti-overflow structure is easy to form, can be disassembled and assembled as an independent component and applied to a self-priming pump, and can be directly used in combination with existing self-priming pumps, resulting in high commercial value.

In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions.

An anti-overflow structure for a self-priming pump is provided in the water outlet chamber of the self-priming pump body. A partition plate is provided between the water outlet and the water return port in the self-priming pump body. The anti-overflow structure includes a partition The guide plate is correspondingly contacted with the guide plate. The edges on both sides of the guide plate are respectively provided with water retaining plates corresponding to the two sides of the water outlet. There is a positioning plate on the outside of the water retaining plate. The guide plate and two water retaining plates are surrounded by The water guide cavity is formed into a water guide cavity. There is a baffle plate above the water guide cavity. A water channel is provided between the baffle plate and the water guide plate. The guide plate is provided with a diverter plate corresponding to the water return port on the back side of the water guide cavity. The baffle plate is The upper end of the board is provided with a positioning portion.

The anti-overflow structure disclosed in this application can be applied to existing self-priming pumps as an independent component, or as a finished component of the self-priming pump. During application, the anti-overflow structure is installed into the body of the self-priming pump. In the water outlet chamber, the positioning part matches the drain plug at the upper end of the water outlet chamber to realize the compression and limitation of the anti-overflow structure. The positioning plate is positioned closely with the wall of the water outlet chamber to realize the rapid and stable installation of the anti-overflow structure in the water outlet chamber; The guide plate is in contact with the partition plate. When the water outlet in the self-priming pump body flows out, the water flow passes through the partition plate and the guide plate to achieve gas-liquid collision and separation, and the gas overflows directly from the water outlet cavity from the water tank. The water flow rushes upward to the water guide cavity and is blocked by the baffle above the water guide cavity. It undergoes another internal convection collision to overflow the gas. Then the water flow flows out from the water channel to both sides of the anti-overflow structure. The water body does not directly flow to the outlet. Due to the directional force of the flow of the air outlet pipe in the cavity, the water flowing out from the water tank preferentially flows back from the back side of the guide plate to the water return port in the body of the self-priming pump, thereby preventing the water flow from flowing out of the air outlet pipe with the air into the body of the self-priming pump. This can greatly improve the suction lift of the self-priming pump. According to the test, after the original three-meter suction lift of the self-priming pump is combined with this application, the suction lift is increased to more than eight meters, which significantly increases the suction lift of the self-priming pump and improves the self-priming pump. The application capability of the suction pump has high commercial value.

Preferably, the guide plate includes a step portion with a corresponding partition plate from the lower end, and the side of the guide plate corresponding to the water guide chamber is provided with an expansion surface, a transition surface and a guide surface in order from the step portion upward, and the expansion surface is An inclined plane set toward one side of the manifold from bottom to top. The expansion surface and the partition plate cooperate to form a backward inclined slope, which facilitates the formation of forward alternating collision convection on the expansion surface and the outlet wall surface of the opposite expansion surface when the water flows out of the outlet, thereby achieving reliable gas-liquid separation.

Preferably, the diverter plate is arranged perpendicularly to the guide surface, and the diverter plate corresponds to the longitudinal middle position of the diverter plate. The diverter plate corresponds to the water return port of the self-priming pump body, which can guide the return water body, achieve combing of the water body, and improve the stability of the return water.

Preferably, the positioning plate adopts an L-shaped plate structure. The positioning plate includes a horizontal plate that fits the wall of the water outlet chamber of the self-priming pump body and a vertical plate that is connected to the water retaining plate. There is a transition outside the connection between the vertical plate and the horizontal plate. Rounded corners. Realize the reliable positioning and installation of the anti-overflow structure in the body of the self-priming pump. The transition fillet protects the connection between the horizontal plate and the vertical plate, and can be used as an entry point when installing the anti-overflow structure, making it convenient to install the anti-overflow structure.

Preferably, the lateral width dimension of the splitter plate gradually decreases outward from the baffle plate. Due to the effect of inertia, the amount of return water at the outer end of the splitter plate is larger than the amount of return water at the connection end of the splitter plate and the deflector plate. The lateral width of the splitter plate corresponds to the amount of return water. Where the amount of return water is large, the lateral width of the splitter plate is small and the flow guide is small. Better performance with higher reflow stability.

Preferably, the diverter plate is provided with a positioning circular platform, and the radial dimension of the positioning circular platform is larger than the lateral width of the corresponding diverter plate. The positioning circular table is arranged perpendicularly to the guide surface. The positioning circular table can have a guiding effect similar to that of a fusiform surface on the return water body, preventing the return water part at the end of the splitter plate from forming turbulent flow due to the weakening of the guiding effect.

Preferably, both ends of the baffle are provided with water retaining eaves corresponding to the exterior of the baffle. The setting of the water-retaining eaves reduces the amount of water in the water-guiding cavity from overflowing to the upper side, and the water flowing out of the water-guiding cavity flows out from the lower side of the water-retaining eaves, thereby further ensuring the anti-overflow function of the anti-overflow structure.

Preferably, the positioning part includes a positioning frame, a positioning rod is provided on the positioning frame, and a turbulent flow groove is provided in the positioning frame. The positioning rod cooperates with the drain plug. The turbulence groove in the positioning frame can be used to further block the water vapor brought out by the gas and reduce the amount of water overflow.

Preferably, the step portion protrudes toward the side of the water guide cavity relative to the guide plate, and an angled structure is formed between the step portion and the expansion surface. The corner position forms a space for turbulent flow when the steam flows out of the outlet, and can even form a vortex, so that the water and gas mixture are reliably dispersed at the corner position, improving the efficiency of gas-liquid separation.

As a preferred option, the anti-overflow structure is injection molded in one piece. It is easy to form, has low production cost, high structural stability, and has waterproof and anti-corrosion capabilities.

The invention has the following beneficial effects: the anti-overflow structure can be installed quickly and stably in the water outlet chamber; it can greatly increase the suction stroke of the self-priming pump and improve the application ability of the self-priming pump; it is easy to form and can be disassembled and assembled as an independent component and applied to the self-priming pump. In the suction pump, it can be directly applied in combination with the existing self-priming pump, which has high commercial value.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention.

Figure 2 is a schematic structural diagram of the present invention from another angle.

Figure 3 is a schematic structural diagram of the present invention when applied to a self-priming pump.

Figure 4 is a schematic top view of the structure when the present invention is applied in a self-priming pump.

Figure 5 is a top view of the water outlet chamber of the self-priming pump used in the embodiment of the present invention.

In the picture: self-priming pump body 1 water inlet 2 water inlet pipe 201 impeller 3 partition plate 4 water outlet 5 return water outlet 6 water outlet chamber 7 air outlet pipe 8 pump cover 9 drain plug 10 guide plate 11 step part 12 expansion surface 13 Transition surface 14 guide surface 15 water retaining plate 16 baffle 17 water channel 18 retaining eaves 19 positioning plate 20 horizontal plate 21 vertical plate 22 diverter plate 23 positioning round table 24 positioning part 25 positioning frame 26 positioning rod 27 turbulent flow groove 28.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Example 1,

As shown in Figures 1 to 4, an anti-overflow structure is used for a self-priming pump. The anti-overflow structure is integrally molded by injection molding. The anti-overflow structure is arranged in the water outlet chamber 7 of the self-priming pump body 1. A partition plate 4 is provided between the water outlet 5 and the return port 6 in the self-priming pump body 1. The anti-overflow structure includes the partition plate 4 Corresponding to the abutting guide plate 11, the edges on both sides of the guide plate 11 are respectively provided with water baffles 16 corresponding to the two sides of the water outlet 5. The baffle 11 and the two water baffles 16 surround a water guide cavity. The guide plate 11 includes a step portion 12 corresponding to the partition plate 4 from the lower end. The step portion 12 protrudes toward the side of the water guide cavity relative to the guide plate 11 . An angle structure is formed between the step portion 12 and the expansion surface 13 . The guide plate 11 is provided with an expansion surface 13, a transition surface 14 and a guide surface 15 in order from the step portion 12 upward on one side corresponding to the water guide chamber. The expansion surface 13 is inclined from bottom to top toward the side of the diverter plate 23. flat. The angle between the expansion surface 13 and the guide surface 15 is 168 degrees, and the guide surface 15 is arranged vertically. The transition surface 14 is arranged tangentially to the expansion surface 13 and the guiding surface 15. There is a baffle 17 above the water guide chamber. The baffle 17 is opposite to the water guide chamber. There is a water channel 18 between the baffle 17 and the water guide 16. The two ends of the baffle 17 are provided with corresponding water retaining parts. The water retaining eaves 19 on the outside of the board 16. The outer ends of the baffle 17 and the water baffle 16 are in close contact with the pump body wall surface of the self-priming pump body 1 corresponding to the water outlet 5, so as to achieve contact and water blocking and ensure the reliability of the water guide chamber. Positioning plates 20 are respectively provided on the opposite outer sides of the two water retaining plates 16. The positioning plates 20 adopt an L-shaped plate structure. The positioning plates 20 include a transverse plate 21 that fits the wall of the water outlet chamber 7 of the self-priming pump body 1 and a The vertical plate 22 connected to the water retaining plate 16 is provided with a transition fillet on the outside of the connection between the vertical plate 22 and the horizontal plate 21 .

The guide plate 11 is provided with a diverter plate 23 corresponding to the water return port 6 on the back side facing away from the water guide chamber, and a positioning portion 25 is provided at the upper end of the baffle 17 . The positioning part 25 includes a positioning frame 26. The positioning frame 26 is provided with a positioning rod 27, and the positioning frame 26 is provided with a turbulent flow groove 28. The diverter plate 23 is arranged perpendicularly to the guide surface 15 , and corresponds to the longitudinal middle position of the guide plate 11 . The lateral width dimension of the diverter plate 23 gradually decreases outward from the guide plate 11 . The diverter plate 23 is provided with a positioning circular platform 24, and the radial dimension of the positioning circular platform 24 is larger than the lateral width of the corresponding diverter plate 23. The axis of the positioning circular table 24 is arranged perpendicularly to the guide surface. The upper end of the diverter plate 23 toward the air outlet pipe 8 is provided with a transitional rounded corner to facilitate the water near the air outlet pipe 8 to flow smoothly into the return port 6 after being guided by the diverter plate 23 . The outer end of the diverter plate 23 is in contact with the pump body wall corresponding to the water return port 6 of the self-priming pump. After the anti-overflow structure is installed, the outer end of the diverter plate 23, the outer end of the water baffle 16, the outer end of the baffle 17 and the positioning plate 20 The outer ends are positioned closely with the wall surface of the water outlet chamber 7 of the self-priming pump body 1, and cooperate with the drain plug 10 and the positioning portion 25 at the upper end to limit the position, thereby realizing the reliable application of the anti-overflow structure in the water outlet chamber 7.

As shown in Figures 3 to 5, the body 1 of the self-priming pump is provided with a water inlet 2, an impeller chamber, a water outlet 5, a water return port 6, a water outlet chamber 7 and an air outlet pipe 8. The air outlet pipe 8 is also used as a water outlet pipe. The water inlet 2 is connected with the water inlet pipe 201 provided on the self-priming pump body. An impeller 3 is disposed in the impeller cavity, and a partition plate 4 is disposed between the water outlet 5 and the water return port 6 . A pump cover 9 is fixed with screws above the pump body 1 of the self-priming pump, and a drain plug 10 is provided on the pump cover 9 . When this application is in use, the overflow prevention structure is installed and fixed in the water outlet chamber 7 of the self-priming pump body 1. The upper end of the partition plate 4 is in contact with the lower end of the step portion 12 at the lower end of the guide plate 11. When the self-priming pump is in use, The pipe sealed with the water inlet pipe 201 extends into the well. The pipe is filled with air. The lower end of the pipe extends below the liquid level in the well. The self-priming pump body 1 is filled with water. The water level corresponds to the water inlet 2 and the water inlet pipe 201. At the lowest end of the junction, the self-priming pump is turned on, and the water body in the rotation of impeller 3 rotates. The water body in water inlet 2 is transferred from the impeller cavity to water outlet 5. The water flow passes through the partition plate 4 and the guide plate 11 to achieve gas-liquid collision. Turbulent separation, the gas directly overflows from the water outlet chamber 7 from the water channel 18. The water flow rushes upward to the water guide chamber and is blocked by the baffle 17 above the water guide chamber. It undergoes another internal convection collision to overflow the gas, and then the water flow is The water flows out from the overflow tank 18 to both sides of the anti-overflow structure. The water body has no directional force to flow directly to the air outlet pipe 8 in the water outlet chamber 7. The water flowing out from the overflow tank 18 preferentially flows back to the self-priming pump from the rear side of the guide plate 11. The water return port 6 in the body 1 and the air outlet pipe 8 are opened on the side facing away from the upper end of the anti-overflow structure for air outlet. The loss of water vapor is small, and the position of the water inlet 2 forms a negative pressure, which attracts the air in the pipe connected to the water inlet 2 and discharges it. , the water body in the impeller cavity is continuously circulated, and all the air in the pipe is discharged. At the same time, the negative pressure attracts water in the pipe, and finally the water inlet pipe 201 and the pipe connected to the water inlet pipe 201 are filled with water. At this time, the self-priming pump can be stabilized If the pipeline is too long and the water in the impeller cavity is discharged too much, the air in the pipeline will be difficult to discharge, that is, the dust suction capacity of the self-priming pump will be exceeded, making the self-priming pump unable to pump water. This application is easy to form and can be used as an independent The disassembly and application of components into a self-priming pump, combined with the direct application of existing self-priming pumps, can greatly improve the suction lift of the self-priming pump. According to tests, after the original three-meter suction lift self-priming pump is combined with this application, the suction The range is increased to more than eight meters, which significantly increases the suction range of the self-priming pump, improves the application capability of the self-priming pump, and has high commercial value.

Claims

An anti-overflow structure for a self-priming pump is provided in the water outlet chamber of the self-priming pump body. A partition plate is provided between the water outlet and the water return port in the self-priming pump body. The feature is that the anti-overflow structure It includes a deflector plate corresponding to the partition plate. The edges on both sides of the deflector plate are respectively provided with water retaining plates corresponding to the two sides of the water outlet. The outside of the deflector plate is provided with a positioning plate, the deflector plate and two The water guide plate surrounds the water guide cavity. There is a baffle plate above the water guide cavity. There is a water channel between the baffle plate and the water guide plate. The guide plate is provided with a corresponding water return port on the back side of the water guide cavity. The diverter plate has a positioning portion on the upper end of the baffle plate.
An anti-overflow structure for a self-priming pump according to claim 1, wherein the guide plate includes a step portion with a corresponding partition plate from the lower end, and the guide plate is corresponding to the water guide cavity. The expansion surface, the transition surface and the guide surface are arranged in sequence from the step portion upwards on one side of the structure, and the expansion surface is an inclined plane provided from bottom to top toward the side of the manifold plate.
An anti-overflow structure for a self-priming pump according to claim 2, characterized in that the diverter plate is arranged perpendicular to the water guide surface, and the diverter plate corresponds to the longitudinal middle position of the guide plate.
An anti-overflow structure for a self-priming pump according to claim 1, characterized in that the positioning plate adopts an L-shaped plate structure, and the positioning plate includes a horizontal plate that is in contact with the wall surface of the water outlet chamber of the self-priming pump body. The board and the vertical board connected to the water retaining board are provided with transition fillets on the outside of the connection between the vertical board and the horizontal board.
The anti-overflow structure for a self-priming pump according to claim 1 or 3, characterized in that the transverse width of the diverter plate gradually decreases outward from the guide plate.
An anti-overflow structure for a self-priming pump according to claim 5, characterized in that the manifold plate is provided with a positioning circular platform, and the radial dimension of the positioning circular table is greater than the lateral width of the corresponding manifold plate.
The anti-overflow structure for a self-priming pump according to claim 1, wherein the two ends of the baffle are provided with water retaining eaves corresponding to the outside of the water baffle.
An anti-overflow structure for a self-priming pump according to claim 1, characterized in that the positioning part includes a positioning frame, a positioning rod is provided on the positioning frame, and a turbulent flow groove is provided in the positioning frame.
An anti-overflow structure for a self-priming pump according to claim 2 or 3, characterized in that the step portion protrudes toward the side of the water guide chamber relative to the guide plate, and between the step portion and the expansion surface Form an angled structure.
An anti-overflow structure for a self-priming pump according to claim 1, 2, 3, 4, 7 or 8, characterized in that the anti-overflow structure is integrally molded by injection molding.