CN115370581A

CN115370581A - Jet pump

Info

Publication number: CN115370581A
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: 2022-11-22
Also published as: WO2023236483A1

Abstract

The invention discloses a jet pump which is characterized by comprising an ejector positioned below a water surface and a multistage impeller pump positioned above the water surface, wherein a water inlet pipe and a water outlet pipe are communicated between the ejector and the multistage impeller pump. The invention has the advantages that: when the ejector is applied, the ejector can pump water upwards immediately no matter how deep the water body is, and the requirement on the vacuum degree 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 usually that the water pump is installed near the water supply source, or the height difference between the water pump and the water supply source is small, so as to reduce the suction lift; however, when pumping water from a deep well, the existing water pump often has insufficient suction lift, cannot rapidly and effectively pump out water in the deep well, and has low working efficiency.

In the chinese patent literature, patent number CN2016210914649 entitled "a two-stage jet pump" issued in 2017, 5/24/a, this application discloses a two-stage jet pump, which includes a pump body, a water inlet and a water outlet are provided on the pump body, the water inlet is communicated with an injector, a multi-stage impeller guide vane mechanism which drives rotation by a motor is provided in the pump body, a water drawing port is provided in front of the multi-stage impeller guide vane mechanism, and a jet passage is provided between the water drawing port and the water inlet. This application is through integrating the sprayer with the pump body to improve the dust absorption, its weak point lies in: this application is integrated with the sprayer and the pump body, and when in-service use, the sprayer all is located the water body with the pump body outside, and the air still will be earlier than the water body discharge in the sprayer outer end pipeline, receives the pipeline suction stroke influence great during the application, if the length of evacuation in the pipeline is big moreover, can exert an influence to the pipeline internal strength, causes the pipeline to burst the deformation easily, reduces the life of pipeline.

Disclosure of Invention

Based on the defects in the prior art, the invention provides the jet pump, the ejector can directly convey water upwards in the suction stroke 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 borne 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.

Another object of the present invention is to provide a multi-stage vane pump structure, which can be used with an ejector, and which can be easily connected to a water inlet pipe and a water outlet pipe, and can be easily maintained and replaced, and can be pressurized in multiple stages to increase the lift of the ejector.

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

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

The ejector and the pump body are respectively positioned inside and outside the water body, and the ejector can directly pump water upwards in a suction stage when being applied, and vacuum pressure inside the water inlet pipeline can be obviously reduced by matching with 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 vane pump comprises a pump body, one end of the pump body is provided with a water inlet corresponding to the water inlet pipe and a water outlet corresponding to the water outlet pipe, the side face 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 arranged on the end cover in a rotating mode, a first impeller and a plurality of second impellers are sequentially arranged on the pump shaft from the end cover to one side direction of the pump body, the first impeller is located in the end cover, a first flow deflector matched with the first impeller is arranged on the end cover, the outer side of the second impeller is provided with a second flow deflector and an inner shell, inner shells corresponding to adjacent second impellers are sequentially lapped, a joint part is arranged between the water inlet and the inner shell adjacent to the water inlet, 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 a motor, the motor rotates to drive the pump shaft to rotate, the pump shaft drives a first impeller and a second impeller on the pump shaft to rotate, the first impeller and each second impeller realize pressurization, and the pump head of the pump body is improved; the setting of water inlet interface and water outlet interface conveniently realizes being connected of the pump body and inlet tube and outlet pipe, improves the installation convenience.

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 clamping connection can be realized between the adjacent inner shells through the matching of the limiting ring groove and the limiting convex ring, and 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 ring groove is provided with a radial positioning groove recessed inwards. The radial positioning block is matched with the radial positioning groove to realize synchronous radial rotation between the adjacent inner shells, and the limit ring groove and the limit convex ring are matched to realize reliable fixation between the adjacent inner shells.

Preferably, the joint includes that the first hole and the second that eccentric settings connect the hole, and the first hole that connects corresponds with the interface of intaking, and the second connects the hole and coaxial correspondence with the pump shaft, and first hole and second connect and are equipped with the transition water conservancy diversion face between the hole. 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, when jet pump actual application, can steam separation under the action of gravity, and gas discharges earlier from the delivery port, and the water can flow back to in the outlet pipe from water outlet interface, and the air in inlet tube and the outlet pipe of convenient evacuation shortens the journey 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. Realize first sealed joint that connects hole and water inlet interface, improve the reliability of the multistage pressure boost of multistage impeller.

As preferred, the second water conservancy diversion piece includes the water blocking piece with impeller axis vertically, and the water blocking piece is just being equipped with the circumference guide plate that cooperates the second impeller outer end to go out water on one side circumference of second impeller, forms the basin between the circumference guide plate, is equipped with the breach groove that corresponds the basin on the water blocking piece, and one side that the water blocking piece is back to the second impeller is equipped with a plurality of water guide strips that the circumference array set up, and a plurality of water guide strips are the vortex setting. The second impeller rotates to enable the water body to rotate to the periphery of the water body in a centrifugal pressurizing mode from the axial direction of the water body, the water body flows back to the rear side of the water retaining piece through the water passing groove and the notch groove after being guided by the circumferential guide plate, and the water guide strip on the rear side of the water retaining piece forms flow guide to enable the water body to smoothly enter the next impeller, so that flow velocity loss is reduced, and the reliability of multistage pressurization of the multistage impeller is guaranteed.

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

Preferably, a guide ring which is convexly arranged is arranged on the inner ring of one side of the water retaining sheet back to the second impeller, and the outer ring surface of the guide ring is in a circular truncated cone shape. The arrangement of the flow guide ring, particularly the arrangement of the outer ring surface of the circular truncated cone of the flow guide ring, ensures that water can 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 invention has the beneficial effects that: 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 on the water inlet pipeline and prolong the service life of the water inlet pipeline by matching with the suction of the pump body; the water feeding is faster, the exhaust time is shortened, and the application efficiency of the jet pump is improved; can multistage pressure boost, improve pump body lift.

Drawings

FIG. 1 is a schematic diagram of the present invention.

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

Figure 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 according to the present invention.

Fig. 5 is a schematic structural view of a second guide vane of the present invention.

FIG. 6 is a schematic view of the structure of the present invention.

In the figure: an inlet pipe 2 of the ejector 1, an outlet pipe 3 of the ejector 1, a multi-stage impeller pump 4, a pump body 5, an inlet port 6, an outlet port 7 of the pump body 5, an end cover 8, an end cover 9, a pump shaft 10, a first impeller 11, a second impeller 12, a first flow deflector 13, a second flow deflector 14, an inner shell 15, a water deflector 16, a circumferential flow deflector 17, a water guide strip 20, a raised strip 21, a limiting groove 22, a guide ring 23, a joint 24, a first connecting hole 25, a second connecting hole 26, a transitional guide surface 27, a sealing ring groove 28, a positioning raised ring 29, a positioning raised ring 31 and a radial positioning groove 33 of a radial positioning block 32 of the positioning raised ring 31 of the positioning ring 29 are formed.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

In the case of the example 1, the following examples are given,

as shown in fig. 1 to 5, a jet pump comprises an ejector 1 located below the water surface and a multistage impeller pump 4 located above the water surface, wherein a water inlet pipe 2 and a water outlet pipe 3 are communicated between the ejector and the multistage 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 a 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 circular columns with parallel axes, the water outlet interfaces 7 are all cylindrical structures, the rear end of the water inlet interface 6 extends into the pump body 5, and the end parts of the water outlet interfaces 7 are 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 fixedly connected in a sealing way 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 direction 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 flow deflector 13 matched with the first impeller 11, and the height of the first flow deflector 13 corresponds to the height of the wall surface of the end cover 9. The outside of second impeller 12 is equipped with second water conservancy diversion piece 14 and inner casing 15, second water conservancy diversion piece 14 includes 16 with impeller axis vertically water-retaining piece, water-retaining piece 16 is just being equipped with the circumference guide plate 17 that cooperates the outer end of second impeller 12 to go out water on one side circumference of second impeller 12, form water channel 18 between the circumference guide plate 17, be equipped with the breach groove 19 that corresponds water channel 18 on the water-retaining piece 16, one side that water-retaining piece 16 is back to second impeller 12 is equipped with a plurality of water guide strip 20 that the circumference array set up, a plurality of water guide strip 20 are the vortex setting. The end of the water guide strip 20 is provided with a convex strip 21, the cross section of the convex strip 21 is in the shape of an isosceles triangle, and the inner shell 15 is provided with a limit groove 22 corresponding to the convex strip 21. The inner ring of one side of the water baffle 16 back to the second impeller 12 is provided with a guide ring 23 which is arranged in a convex way, and the outer ring surface of the guide ring 23 is in a circular truncated cone shape. Be equipped with the splicing piece 24 between interface 6 and the interior casing 15 that is adjacent with interface 6 of intaking into water, the splicing piece 24 includes that eccentric settings's first hole 25 and second connect the hole 26, and first hole 25 corresponds with interface 6's back end of intaking, and the second connects hole 26 and pump shaft 10 coaxial correspondence, and first hole 25 and second are connected and are equipped with transition water conservancy diversion face 27 between the hole 26. The outer end of the hole 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. End cap 9 is provided with a locating collar 29 that engages inner housing 15 adjacent 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 protruding outwards. The groove wall of the limiting ring groove 30 is provided with a radial positioning groove 33 which is inwards sunk. The radial positioning blocks 32 are matched with the radial positioning grooves 33, and the inner casings 15 corresponding to the adjacent second impellers 12 are sequentially overlapped. A stop collar 31 and a radial positioning block 32 are also provided on the joint 24 to enable the joint 24 to be overlapped with the adjacent inner shell 15.

When the water body centrifugal pumping device is used, as shown in fig. 6, the ejector 1 is sunk to the lower side of the liquid level, the multistage impeller pump 4 is located above the liquid level, the multistage impeller pump 4 and the ejector 1 are communicated with the water outlet pipe 3 through the water inlet pipe 2, when the water body centrifugal pumping device is used, the ejector 1 and the multistage impeller pump 4 are opened simultaneously, air in the water outlet pipe 3 and a water body are mixed and then sprayed out from the ejector 1, the ejector 1 transports water vapor to the water inlet pipe 2 upwards, the 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 is pressurized, due to the density relationship, the gas is upwards sent out from the water outlet 8, the water body flows back to the water outlet pipe 3 and extrudes the air in the water return pipe, the water vapor mixture is continuously sent into the pump body 5, the water vapor enters the pump body 5 from the water inlet interface 6, the water vapor flows through the three second impellers 12 and the first impeller 11 in a guiding mode of the connecting piece 24, and finally is matched with the first guide piece 13 on the end cover 9, the water body is guided and diffused to the inner side of the peripheral wall of the pump body 5, after the gas is discharged to a certain degree, the centrifugal force can be sucked out from the water body under the action, and the water body 8, and the water body is sucked.

The vacuum negative pressure applied to the interior of the water inlet pipe 2 can be obviously reduced, and the service life of the water inlet pipe 2 is prolonged; the water feeding is faster, the exhaust time is shortened, and the application efficiency of the jet pump is improved; the pump body 5 can be pressurized in multiple stages, and the lift is increased; in addition, different lengths can be changed to inlet tube 2 and outlet pipe 3, realize length adjustment, and the maintenance is convenient with the change, can adapt to the liquid level of co-altitude not, corresponds the higher water of liquid level height, can change short inlet tube 2 and outlet pipe 3, guarantees the efficiency of intaking.

Claims

1. A jet pump is characterized by comprising an ejector positioned below a water surface and a multistage impeller pump positioned above the water surface, wherein a water inlet pipe and a water outlet pipe are communicated between the ejector and the multistage impeller pump.

2. The jet pump of claim 1, wherein the multistage vane pump comprises a pump body, one end of the pump body is provided with a water inlet corresponding to the water inlet pipe and a water outlet corresponding to the water outlet pipe, a water outlet is provided at a side of the pump body, the other end of the pump body is provided with an end cap, a pump shaft is rotatably provided on the end cap, a first vane and a plurality of second vanes are sequentially provided on the pump shaft from the end cap to a side of the pump body, the first vane is located in the end cap, a first guide vane matching the first vane is provided on the end cap, a second guide vane and an inner housing are provided on an outer side of the second vane, inner housings corresponding to adjacent second vanes are sequentially overlapped, a joint is provided between the water inlet and the inner housing adjacent to the water inlet, and a positioning convex ring matching the inner housing adjacent to the end cap is provided in the end cap.

3. The jet pump according to claim 2, wherein one end of the inner casing is provided with a stopper ring groove, and the other end of the inner casing is provided with a stopper protruding ring capable of engaging with the stopper ring groove.

4. The jet pump according to claim 3, wherein the retainer ring has an outwardly projecting radial positioning block, and the retainer ring groove has an inwardly recessed radial positioning groove formed in a wall thereof.

5. The jet pump of claim 2 or 3, wherein the joint 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 flow guide surface is arranged between the first connecting hole and the second connecting hole.

6. The jet pump of claim 5 wherein the outer end of the bore wall of the first connecting bore is provided with a sealing ring groove for fitting the water inlet port, and a sealing ring is provided in the sealing ring groove.

7. The jet pump as claimed in claim 2 or 3, wherein the second guide vane comprises a water-retaining plate perpendicular to the axis of the impeller, a circumferential guide plate is provided on a side of the water-retaining plate opposite to the second impeller for matching with the water discharged from the outer end of the second impeller, a water passing groove is formed between the circumferential guide plates, a notch groove corresponding to the water passing groove is provided on the water-retaining plate, a plurality of water-retaining strips are provided on a side of the water-retaining plate opposite to the second impeller in a circumferential array, and the plurality of water-retaining strips are provided in a vortex arrangement.

8. The jet pump of claim 7 wherein the end of the water guide bar is provided with a rib having an isosceles triangle cross-section, and the inner housing is provided with a limiting groove corresponding to the rib.

9. The jet pump of claim 7 wherein the side of the water deflector facing away from the second impeller has a raised deflector ring on the inner ring, the outer ring of the deflector ring being in the shape of a truncated cone.