CN115370581B

CN115370581B - Jet pump

Info

Publication number: CN115370581B
Application number: CN202210651837.7A
Authority: CN
Inventors: 张逸; 林荣; 颜成刚
Original assignee: Leo Group Zhejiang Pump Co Ltd
Current assignee: Leo Group Zhejiang Pump Co Ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2024-06-14
Anticipated expiration: 2042-06-09
Also published as: WO2023236483A1; CN115370581A

Abstract

The invention discloses a jet pump which is characterized by comprising an ejector positioned below the water surface and a multi-stage impeller pump positioned above the water surface, wherein a water inlet pipe and a water outlet pipe are communicated between the ejector and the multi-stage impeller pump. The invention has the advantages that: the ejector and the pump body are respectively positioned inside and outside the water body, and when the ejector is applied, no matter how deep the water body is, the ejector can pump water upwards immediately, and the vacuum requirement in the water inlet pipeline can be obviously reduced by matching with the suction of the pump body, so that the service life of the water inlet pipeline is prolonged; the water feeding is faster, the exhaust time is reduced, and the application efficiency of the jet pump is improved.

Description

Jet pump

Technical Field

The invention relates to the technical field of jet pumps, in particular to a jet pump.

Background

The industrial pump is often provided with a water pump near the water supply source, or the height difference between the water pump and the water supply source is small, so that the suction stroke is reduced; however, when the deep well is pumped, the existing water pump is often insufficient in suction stroke, water in the deep well cannot be pumped out quickly and effectively, and the working efficiency is low.

In Chinese patent literature, the patent number is CN2016210914649 in 2017, and the patent of a double-stage jet pump is issued 24 days in 5 months, the application discloses a double-stage jet pump, which comprises a pump body, a water inlet and a water outlet are arranged on the pump body, the water inlet is communicated with an ejector, a multi-stage impeller guide vane mechanism which is driven to rotate by a motor is arranged in the pump body, a water suction port is arranged in front of the multi-stage impeller guide vane mechanism, and a jet channel is arranged between the water suction port and the water inlet. This application is through integrating sprayer and the pump body to improve the dust absorption, its weak point lies in: the application is integrated with the sprayer and the pump body, and when in actual use, the sprayer and the pump body are both located outside the water body, and air in the pipeline at the outer end of the sprayer still needs to be discharged before the water body, and the application is greatly influenced by the pipeline suction process, and if the length of the vacuumizing in the pipeline is large, the pipeline internal strength can be influenced, the pipeline is easy to collapse and deform, and the service life of the pipeline is reduced.

Disclosure of Invention

Based on the defects in the prior art, the jet pump provided by the invention has the advantages that the ejector can directly convey water upwards in the suction stage, compared with the mode that the water inlet pipe is arranged at the outer end of the ejector in the prior art, the vacuum pressure born by the water inlet pipe can be reduced, the service life of the water inlet pipe is prolonged, the water feeding is fast, the exhaust time is short, and the application efficiency of the jet pump is improved.

The invention further aims to provide a special multistage impeller pump structure which can be used with an ejector, is convenient to set, connect, maintain and replace a water inlet pipe and a water outlet pipe, and can be used for multistage pressurization to improve the lift of the ejector pump.

In order to achieve the above object, the present invention proposes the following technical solutions.

The jet pump is characterized by comprising an ejector positioned below the water surface and a multi-stage impeller pump positioned above the water surface, wherein a water inlet pipe and a water outlet pipe are communicated between the ejector and the multi-stage impeller pump.

The ejector and the pump body are respectively positioned inside and outside the water body, and can directly pump water upwards in the suction stage when the ejector is applied, and the vacuum pressure in the water inlet pipeline can be obviously reduced by matching with the suction of the pump body, so that the service life of the water inlet pipeline is prolonged; the water inlet pipe and the water outlet pipe are convenient to maintain; the water feeding is faster, the exhaust time is reduced, and the application efficiency of the jet pump is improved.

Preferably, the multistage impeller pump comprises a pump body, one end of the pump body is provided with a water inlet port corresponding to a water inlet pipe and a water outlet port corresponding to a water outlet pipe, the side surface of the pump body is provided with a water outlet, the other end of the pump body is provided with an end cover, a pump shaft is rotatably arranged on the end cover, a first impeller and a plurality of second impellers are sequentially arranged on the pump shaft from the end cover to one side of the pump body, the first impeller is positioned in the end cover, a first guide vane matched with the first impeller is arranged on the end cover, the outer side of the second impeller is provided with a second guide vane and an inner shell, the inner shells corresponding to the adjacent second impellers are sequentially overlapped, a joint piece is arranged between the water inlet port and the inner shell adjacent to the water inlet port, and a positioning convex ring matched with the inner shell adjacent to the end cover is arranged in the end cover. The pump shaft is connected with the motor, the motor rotates to drive the pump shaft to rotate, the pump shaft drives the first impeller and the second impellers on the pump shaft to rotate, the first impeller and each second impeller are pressurized, and the pump body lift is improved; the water inlet interface and the water outlet interface are arranged to facilitate connection of the pump body with the water inlet pipe and the water outlet pipe, and installation convenience is improved.

Preferably, one end of the inner shell is provided with a limiting ring groove, and the other end of the inner shell is provided with a limiting convex ring which can be matched with the limiting ring groove. The adjacent inner shells can be clamped by matching the limiting ring groove with the limiting convex ring, so that the convenience of connection between the adjacent inner shells is improved.

Preferably, the limiting convex ring is provided with a radial positioning block protruding outwards, and the groove wall of the limiting annular groove is provided with a radial positioning groove sinking inwards. The radial positioning blocks are matched with the radial positioning grooves to realize synchronous radial rotation between the adjacent inner shells, and the radial positioning blocks are matched with the limiting ring grooves and the limiting convex rings to realize reliable fixation between the adjacent inner shells.

Preferably, the joint piece comprises a first connecting hole and a second connecting hole which are eccentrically arranged, the first connecting hole corresponds to the water inlet interface, the second connecting hole coaxially corresponds to the pump shaft, and a transition diversion surface is arranged between the first connecting hole and the second connecting hole. The first connecting hole corresponds water inlet interface and pump shaft respectively, and the pump shaft is eccentric with water inlet interface, and water outlet interface is located water inlet interface's downside, because water density is greater than gas density, can water vapor separation under the action of gravity when jet pump practical application, gas is discharged from the delivery port earlier, and the water can follow water outlet interface backward flow to in the outlet pipe, the convenient evacuation inlet tube of air in the outlet pipe shortens the suction stroke time.

Preferably, the outer end of the hole wall of the first connecting hole is provided with a sealing ring groove matched with the water inlet connector, and a sealing ring is arranged in the sealing ring groove. The sealing clamping connection of the first connecting hole and the water inlet interface is realized, and the reliability of multistage pressurization of the multistage impeller is improved.

Preferably, the second guide vane comprises a water baffle plate perpendicular to the axis of the impeller, a circumferential guide plate matched with the water outlet at the outer end of the second impeller is circumferentially arranged on one side of the water baffle plate, a water passing groove is formed between the circumferential guide plates, a notch groove corresponding to the water passing groove is formed in the water baffle plate, a plurality of water guide strips arranged in a circumferential array are arranged on one side, facing away from the second impeller, of the water baffle plate, and the water guide strips are arranged in a vortex mode. The second impeller rotates to rotate the water body from the axial centrifugal pressurization to the periphery of the second impeller, the water body flows back to the rear side of the water retaining plate through the water passing groove and the notch groove after being guided by the circumferential flow guide plate, the water guiding strip at the rear side of the water retaining plate forms the flow guide, so that the water body smoothly enters the next impeller, the flow velocity loss is reduced, and the multi-stage supercharging reliability of the multi-stage impeller is ensured.

Preferably, the end of the water guide strip is provided with a raised line, the cross section of the raised line is isosceles triangle, and the inner shell is provided with a limit groove corresponding to the raised line. The convex strips are connected with the limiting grooves in an abutting mode, the water guide strips are connected with the wall surface of the inner shell in an abutting mode, a reliable flow guide channel is formed, and water circulation is facilitated.

Preferably, a guide ring which is arranged in a convex manner is arranged on the inner ring at one side of the water baffle, which is opposite to the second impeller, and the outer ring of the guide ring is in a truncated cone shape. The arrangement of the guide ring, in particular to the arrangement of the circular truncated cone-shaped outer ring surface of the guide ring, enables water to smoothly flow out of the inner shell and flow into the next impeller after passing through the water retaining sheet, and ensures the reliability of pressurization.

The beneficial effects of the invention are as follows: the ejector is positioned below the liquid level, can directly pump water upwards in the suction stage, and can obviously reduce the vacuum negative pressure received by the water inlet pipeline by matching with the suction of the pump body, so that the service life of the water inlet pipeline is prolonged; the water is fed faster, the exhaust time is reduced, and the application efficiency of the jet pump is improved; the pump body lift can be improved by multi-stage supercharging.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an internal cross-sectional view of the pump body of the present invention.

Fig. 3 is an exploded view of the pump body of the present invention.

Fig. 4 is a schematic view of the structure of the joint in the present invention.

Fig. 5 is a schematic structural view of a second baffle according to the present invention.

Fig. 6 is a schematic diagram of the structure of the present invention when applied.

In the figure: the water outlet pipe 3 of the water inlet pipe 2 of the ejector 1, the water outlet pipe 3 of the pump body 5, the water inlet port 6, the water outlet port 7, the end cover 9, the pump shaft 10, the first impeller 11, the second impeller 12, the first guide vane 13, the second guide vane 14, the inner shell 15, the water retaining vane 16, the circumferential guide vane 17, the water trough 18, the notch groove 19, the water guide strip 20, the convex strip 21, the limit groove 22, the guide ring 23, the joint piece 24, the first joint hole 25, the second joint hole 26, the transitional guide surface 27, the sealing ring groove 28, the positioning convex ring 29, the limit ring groove 30, the limit convex ring 31 and the radial positioning groove 33.

Detailed Description

The invention will be further described with reference to the drawings and the specific embodiments.

In the case of example 1,

As shown in fig. 1 to 5, a jet pump comprises an ejector 1 positioned below the water surface and a multi-stage impeller pump 4 positioned above the water surface, wherein a water inlet pipe 2 and a water outlet pipe 3 are communicated between the ejector and the multi-stage impeller pump 4. The multistage impeller pump 4 comprises a pump body 5, one end of the pump body 5 is provided with a water inlet interface 6 corresponding to the water inlet pipe 2 and a water outlet interface 7 corresponding to the water outlet pipe 3, the water inlet pipe 2 and the water inlet joint are in sealing connection through threads and a sealing ring, and the water outlet pipe 3 and the water outlet interface 7 are in sealing connection through threads and the sealing ring. The side of the pump body 5 is provided with a water outlet 8, and the water outlet 8 is arranged upwards. The water inlet interface 6 and the water outlet interface 7 are distributed up and down and are arranged in parallel. The water inlet interface 6 is a structure formed by combining two sections of eccentric cylinders with parallel axes, the water outlet interface 7 is of a cylindrical structure, the rear end of the water inlet interface 6 extends into the pump body 5, and the end part of the water outlet interface 7 is in smooth transition connection with the wall surface of the pump body 5. The other end of the pump body 5 is provided with an end cover 9, and the pump body 5 and the end cover 9 are in sealing and fixed connection through screws and sealing rings. The end cover 9 is rotatably provided with a pump shaft 10, the pump shaft 10 is sequentially provided with a first impeller 11 and three second impellers 12 from the end cover 9 to one side of the pump body 5, the first impeller 11 is positioned in the end cover 9, the end cover 9 is provided with a first guide vane 13 matched with the first impeller 11, and the height of the first guide vane 13 corresponds to the height of the wall surface of the end cover 9. The outside of second impeller 12 is equipped with second guide vane 14 and inner shell 15, second guide vane 14 includes the manger plate piece 16 with the impeller axis vertically, manger plate piece 16 is just to be equipped with the circumference guide plate 17 that cooperates the outer end of second impeller 12 to go out water in the circumference of one side of second impeller 12, form between the circumference guide plate 17 and cross basin 18, be equipped with the breach groove 19 that corresponds to crossing basin 18 on the manger plate piece 16, one side that manger plate piece 16 was facing away from second impeller 12 is equipped with a plurality of water guide strips 20 that the circumference array set up, a plurality of water guide strips 20 are the vortex setting. The end of the water guiding strip 20 is provided with a raised line 21, the cross section of the raised line 21 is isosceles triangle, and the inner shell 15 is provided with a limit groove 22 corresponding to the raised line 21. The side of the water baffle 16 facing away from the second impeller 12 is provided with a guide ring 23 which is arranged in a convex manner on the inner ring, and the outer ring of the guide ring 23 is in a truncated cone shape. A joint piece 24 is arranged between the water inlet interface 6 and the inner shell 15 adjacent to the water inlet interface 6, the joint piece 24 comprises a first joint hole 25 and a second joint hole 26 which are eccentrically arranged, the first joint hole 25 corresponds to the rear section of the water inlet interface 6, the second joint hole 26 coaxially corresponds to the pump shaft 10, and a transition flow guide surface 27 is arranged between the first joint hole 25 and the second joint hole 26. The outer end of the wall of the first connecting hole 25 is provided with a sealing ring groove 28 matched with the water inlet connector 6, and a sealing ring is arranged in the sealing ring groove 28. The end cap 9 has a locating boss 29 disposed therein that mates with the inner housing 15 adjacent the end cap 9. One end of the inner shell 15 is provided with a limiting ring groove 30, and the other end of the inner shell 15 is provided with a limiting convex ring 31 which can be matched with the limiting ring groove 30. The limiting convex ring 31 is provided with a radial positioning block 32 which protrudes outwards. The groove wall of the limit groove 30 is provided with a radial positioning groove 33 which is sunk inwards. The radial positioning blocks 32 are matched with the radial positioning grooves 33, and the inner shells 15 corresponding to the adjacent second impellers 12 are sequentially overlapped. The engaging member 24 is also provided with a limiting collar 31 and a radial positioning block 32, which can realize the overlap joint between the engaging member 24 and the adjacent inner housing 15.

In the application of the application, as shown in fig. 6, the ejector 1 is submerged below the liquid level, the multistage impeller pump 4 is positioned above the liquid level, the multistage impeller pump 4 is communicated with the ejector 1 through the water inlet pipe 2 and the water outlet pipe 3, in the application, the ejector 1 and the multistage impeller pump 4 are simultaneously opened, air in the water outlet pipe 3 and water are mixed and sprayed out of the ejector 1 together, the ejector 1 conveys water vapor to the water inlet pipe 2 upwards, air in the water inlet pipe 2 is extruded into the pump body 5 of the multistage impeller pump 4 from the water inlet interface 6 and pressurized, because of the density relationship, air is sent upwards from the water outlet 8, water body flows back to the water outlet pipe 3 and is extruded out of air in the water return pipe, water vapor mixture is continuously fed into the pump body 5 from the water inlet interface 6, water vapor flows through the three second impellers 12 and one first impeller 11 through the guiding means of the joint piece 24, finally is matched with the first guiding piece 13 on the end cover 9, the water body is guided and diffused to the inner side of the pump body 5 through the first guiding piece 13, after the air is discharged to a certain degree, the water body has a large centrifugal force ratio, and the water body can flow out of the water body under the action of the water outlet 8 can be pumped from the water body 8.

The application can obviously reduce the vacuum negative pressure in the water inlet pipe 2 channels and prolong the service life of the water inlet pipe 2 channels; the water is fed faster, the exhaust time is reduced, and the application efficiency of the jet pump is improved; the pump body 5 lift can be improved by multi-stage supercharging; in addition, the inlet tube 2 and outlet pipe 3 can change different length, realize length adjustment, and easy maintenance and change can adapt to the liquid level of different height, corresponds the higher water of liquid level, can change short inlet tube 2 and outlet pipe 3, guarantees water feeding efficiency.

Claims

1. The jet pump is characterized by comprising an ejector positioned below the water surface and a multi-stage impeller pump positioned above the water surface, wherein a water inlet pipe and a water outlet pipe are communicated between the ejector and the multi-stage impeller pump; the multistage impeller pump comprises a pump body, wherein one end of the pump body is provided with a water inlet port corresponding to a water inlet pipe and a water outlet port corresponding to a water outlet pipe, the side surface of the pump body is provided with a water outlet, the other end of the pump body is provided with an end cover, a pump shaft is rotatably arranged on the end cover, a first impeller and a plurality of second impellers are sequentially arranged on the pump shaft from the end cover to one side of the pump body, the first impeller is positioned in the end cover, a first guide vane matched with the first impeller is arranged on the end cover, the outer side of the second impeller is provided with a second guide vane and an inner shell, the inner shells corresponding to the adjacent second impellers are sequentially overlapped, a joint piece is arranged between the water inlet port and the inner shell adjacent to the water inlet port, and a positioning convex ring matched with the inner shell adjacent to the end cover is arranged in the end cover; one end of the inner shell is provided with a limiting ring groove, and the other end of the inner shell is provided with a limiting convex ring which can be matched with the limiting ring groove; the limiting convex ring is provided with a radial positioning block protruding outwards, and the groove wall of the limiting annular groove is provided with a radial positioning groove sinking inwards; the pump shaft is eccentric with the water inlet interface, and the water outlet interface is positioned at the lower side of the water inlet interface.

2. The jet pump of claim 1, wherein the engagement member comprises first and second eccentrically disposed engagement holes, the first engagement hole corresponding to the water inlet port and the second engagement hole coaxially corresponding to the pump shaft, and a transition guide surface is disposed between the first and second engagement holes.

3. The jet pump of claim 2, wherein the outer end of the wall of the first connecting hole is provided with a sealing ring groove matched with the water inlet connector, and a sealing ring is arranged in the sealing ring groove.

4. The jet pump of claim 1, wherein the second guide vane comprises a water baffle plate perpendicular to the axis of the impeller, a circumferential guide plate matched with the water outlet at the outer end of the second impeller is circumferentially arranged on one side of the water baffle plate opposite to the second impeller, a water passing groove is formed between the circumferential guide plates, a notch groove corresponding to the water passing groove is formed in the water baffle plate, a plurality of water guide strips arranged in a circumferential array are arranged on one side of the water baffle plate opposite to the second impeller, and the water guide strips are arranged in a vortex mode.

5. The jet pump of claim 4, wherein the end of the water guiding strip is provided with a convex strip, the cross section of the convex strip is isosceles triangle, and the inner shell is provided with a limit groove corresponding to the convex strip.

6. The jet pump of claim 4, wherein the water retaining plate is provided with a guide ring protruding outwards on the inner ring at a side opposite to the second impeller, and the outer ring of the guide ring is in a shape of a truncated cone.