CN1776233A - High-flow self-priming centrifugal pump - Google Patents
High-flow self-priming centrifugal pump Download PDFInfo
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- CN1776233A CN1776233A CN 200510122653 CN200510122653A CN1776233A CN 1776233 A CN1776233 A CN 1776233A CN 200510122653 CN200510122653 CN 200510122653 CN 200510122653 A CN200510122653 A CN 200510122653A CN 1776233 A CN1776233 A CN 1776233A
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Abstract
A large flow self-suction centrifugal pump consists of S-shaped curve pipe whose upper end connected with water inlet pipeline and lower end communicated with inlet of impeller, plurality of nozzles set on outer side of S-shaped curve pipe, a large duct from outlet extended pipe to inlet of nozzle, the spring valve board can be installed or not be installed in inlet of nozzle. Said invention raises water pumping speed and efficiency.
Description
Affiliated technical field
The present invention is a kind of big-flow self-priming centrifugal pump, be called for short self-priming pump, belong to universal machine product-pump class, especially can rely on a small amount of water in the pump, utilize centrifugal impeller that the inlet pipeline air is taken out light, utilize barometric pressure that the water in the water inlet pool that is lower than the water pump import is drawn up next self-priming pump.
Background technique
At present, known self-priming pump divides two kinds of internal-mixing and external mixture types, and internal-mixing divides two kinds of injection apparatus and no injection apparatus is arranged, wherein have the internal-mixing self-priming pump of injection apparatus have last water soon, the high advantage of suction journey, on small-sized self-priming pump, obtained widespread usage.In fact this injection apparatus is exactly a jet pump, mainly is made up of nozzle, mixing chamber and diffusing tube.But when this structural type was used on the bigger self-priming pump of flow, the last water time was just much long.Main cause is existingly to have the internal-mixing self-priming pump of injection apparatus all to have only a nozzle, and the efficient of giant suction air is lower than small nozzle, and the efficient of the suction air of saying here is the speed of suction air and the ratio of nozzle inflow-rate of water turbine.Especially in order to reduce the volume of self-priming pump, often all cancel diffusing tube, strengthen and the shortening mixing chamber, make the efficient of giant suction air lower than small nozzle.With flow ratio is that 4 times two pumps is the example explanation, suppose that the water pump inlet velocity is identical, suction height is identical, and then the inlet pipeline diameter of big pump is the twice of little pump, the inlet pipeline volume of big pump is four times of little pump, that is to say that air that big pump need aspirate is four times of little pump.The orifice size of simultaneously big pump is the twice of little pump, the jet surface area of giant also is the twice of small nozzle, because the speed of self-priming pump suction air is proportional with the jet surface area, so the speed of giant suction air is the twice of small nozzle, that is to say that big pump aspirates four times air with the speed of twice, how water time will have been grown naturally on it.Change a saying, the inflow-rate of water turbine of giant is four times of small nozzle, but the jet surface area of giant is the twice of small nozzle, and the speed of giant suction air is just low than small nozzle naturally with the ratio of giant inflow-rate of water turbine.More than the calculated value in the explanation has error, but the essence of reflection is sure, and the efficient of the giant suction air of just saying previously is lower than small nozzle certainly.All there are this defective in model utility that has earlier " sprinkling irrigation self-priming pump " (notice of authorization CN2292927Y) and model utility " the high-lift self-priming pump of a kind of big flow " (notice of authorization CN2541639Y).Therefore be used on the mass-flow self-sucking pump, last water can be very not fast.Also the someone attempts to strengthen orifice size and improves and go up water speed, but often things turn out contrary to one's wishes, because the flow of a pump is limited, the said orifice size in front all refers to the appropriate selection of this pump, and further increased diameter can only reduce and goes up water speed.
Also have, the pump efficiency of existing self-priming pump also is an important deficiency well below Ordinary Centrifugal Pumps efficient.
Summary of the invention
In order to overcome the deficiency that water speed is slow on the existing mass-flow self-sucking pump, pump efficiency is low, the invention provides a kind of multiinjector self-priming pump, this self-priming pump not only has injection apparatus, and has a nozzle of a plurality of directive impeller inlets, a limited flow of self-priming pump is divided into multiple jets, thereby increased the jet surface area, reached the problem that improves water speed on the mass-flow self-sucking pump.Simultaneously, the present invention has also taked multinomial technical measures, makes the pump efficiency of self-priming pump and Ordinary Centrifugal Pumps efficient basic identical.
The technical solution adopted for the present invention to solve the technical problems is:
1. in the shell of self-priming pump, a S shape bend pipe is arranged, the last client link inlet pipeline of S shape bend pipe, the lower end and the impeller inlet of S shape bend pipe align straight-through, in the S shape bend pipe outside over against impeller inlet, adorn one group of (promptly a plurality of) nozzle, impeller inlet is all pointed in the outlet of nozzle, an exit cone from water pump is arranged to the major path the import of nozzle in the self-priming pump shell.
Before self-priming pump starts, in the shell of self-priming pump, pour into a small amount of water earlier, the water that is higher than water intake is deposited incessantly, and promptly the upper end of inlet pipeline and S shape bend pipe all is an air.After self-priming pump started, the water in the S shape bend pipe was beaten toward the exit of pump diffusing tube by the impeller suction, makes impeller inlet be in vacuum state, and the lower end of related S shape bend pipe also is in vacuum state.This causes the air in the inlet pipeline to spread toward impeller inlet on the one hand, also produce bigger pressure difference on the other hand in the nozzle both sides, make the water in the exit of pump diffusing tube form the lower end that S shape bend pipe is passed in high-speed jet by nozzle, wrap up in the air that band is come from the inlet pipeline diffusion, be sent to impeller inlet at a high speed.The high-speed jet high vacuum all around that causes again of jet, this air of having accelerated again in the inlet pipeline spreads to jet, thus the speed of having accelerated to pump air has just been accelerated the speed of water on the self-priming pump.
Because under same traffic, the jet surface area of a giant of jet surface area ratio of a plurality of small nozzles is big, thus the efficient of suction air than the existing internal-mixing self-priming pump height that injection apparatus is arranged, just going up water speed can be more hurry up.
2.S there is a bit of straight tube the lower end of shape bend pipe, its diameter is identical with the impeller inlet diameter, and its length is not more than 10 millimeters.
Injection apparatus is formed with nozzle and impeller inlet in the lower end of S shape bend pipe, in order to shorten the axial length of self-priming pump, cancelled diffusing tube in the present invention, the while also as the part of mixing chamber, therefore can shorten the straight-tube portion of S shape bend pipe lower end to impeller inlet greatly.
3. in the inlet of this group nozzle, can adorn a valve plate that spring is arranged, also shock mount valve plate not.If the shock mount valve plate, the axial force of liquid effects on valve plate when then the elastic force of spring is greater than the self-priming pump startup, the axial force of liquid effects on valve plate during less than the self-priming pump proper functioning.
The fluid pressure of spring valve plate present position is basic identical with atmospheric pressure when self-priming pump starts, and promptly relative pressure equals zero; When the self-priming pump proper functioning, relative pressure approximates the self-priming lift of pump.But the pressure in the S shape bend pipe is all basic identical from starting to proper functioning, and relative pressure is a negative value, approximates the suction journey of self-priming pump.Therefore effect all the time has axial force on valve plate, but size is very inequality.Because the axial force of liquid effects on valve plate when the elastic force of spring starts greater than self-priming pump, so valve plate is opened when self-priming pump starts, the water in the self-priming pump can circulate by nozzle, the air in the suction intake pipe.By the time the air in the intake pipe is taken out light, the self-priming pump proper functioning, because the elastic force of spring is the axial force of liquid effects on valve plate during less than the self-priming pump proper functioning, valve plate can be closed automatically, so the water in the self-priming pump no longer circulates by nozzle, self-priming pump just can the same high efficiency work with Ordinary Centrifugal Pumps.
If shock mount valve plate not, when the self-priming pump proper functioning, the water in the self-priming pump continues to circulate by nozzle, and this can increase hydraulic loss, reduce pump efficiency, but the effect of injection apparatus can increase the suction journey and the lift of self-priming pump.
4. this group nozzle will be contained in the outside of S shape bend pipe lower end, can not put in the inside of S shape bend pipe.
This is because S shape bend pipe also is the passage of self-priming pump suction current, and the inside that nozzle puts in S shape bend pipe can influence the smooth and easy mobile of current.Take this measure, simultaneously the inlet at this group nozzle loads onto the spring valve plate, can make the efficient of the pump efficiency of self-priming pump and Ordinary Centrifugal Pumps basic identical.
The invention has the beneficial effects as follows, can be when reducing the self-priming pump volume, the last water speed when improving the self-priming pump startup.Can also improve the pump efficiency (at nozzle inlet place dress valve) of self-priming pump; Or improve the suction journey and the lift (not adorning valve) of self-priming pump at the nozzle inlet place.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the longitudinal section tectonic maps of one embodiment of the invention.
Fig. 2 is the A--A sectional view of Fig. 1.
Fig. 3 is the B--B sectional view of Fig. 1.
Fig. 4 is that the C of Fig. 1 is to view.
Fig. 5 is that the D of Fig. 1 is to view.
1. impeller shafts among the figure, 2. impeller, 3. an envelope, 4. machine tool link span, 5. nozzle sets, 6. self-priming pump shell, 7. spring, 8. valve plate, 9.S shape bend pipe, 10. the exit cone of water pump is to the major path between the import of nozzle, 11. the exit cone of water pump, 12. inlet pipeline, 13. rising pipes, 14. water irrigating hole plugs.
Embodiment
In Fig. 1, impeller shaft (1), impeller (2), axle envelope (3), nozzle sets (5), S shape bend pipe (9), the exit cone of water pump (11), the exit cone of water pump is formed the major component of present embodiment to the major path (10) between the import of nozzle with self-priming pump shell (6), spring (7) and valve plate (8) are used for the import of shut-off nozzle group (5), can improve the pump efficiency of present embodiment, water irrigating hole plug (14) starts the front opening water irrigating hole and uses, machine tool (or the motor internal-combustion engine etc.) fuse with present embodiment by machine tool link span (4) and impeller shaft (1), inlet pipeline (12) is bound up on the upper end of S shape bend pipe (9), and rising pipe (13) is bound up on the top of the exit cone (11) of water pump.
Fig. 2 is the A--A sectional view of Fig. 1, can see that in this figure nozzle sets (5) has 4 apertures to communicate with S shape bend pipe (9), middle axis hole that aperture is valve plate (8), 3 apertures are exactly 3 nozzles on every side, that is to say that the nozzle sets among this embodiment is made up of 3 nozzles, if self-priming pump is big again, then can form nozzle sets with more nozzle.Generally speaking, nozzle quantity is many more, and water speed is fast more on the self-priming pump.
Fig. 3 is the B--B sectional view of Fig. 1, Fig. 4 be the C of Fig. 1 to view, Fig. 5 be the D of Fig. 1 to view, these 5 view co expression the profile and the internal structure of present embodiment.
Before present embodiment starts, to open water irrigating hole plug (14) earlier, in the shell (6) of self-priming pump, pour into a small amount of water, the water that is higher than water intake is deposited incessantly, and promptly the upper end of inlet pipeline (12) and S shape bend pipe (9) all is an air.After present embodiment starts, water in the S shape bend pipe (9) is aspirated and gets in exit of pump diffusing tube (11) and the rising pipe (13) by impeller (2), make impeller inlet be in vacuum state, the lower end of related S shape bend pipe also is in vacuum state, this causes the air in the inlet pipeline to spread toward impeller inlet on the one hand, also produce bigger pressure difference on the other hand in the import and export both sides of nozzle sets, make the water in the exit of pump diffusing tube form the lower end that S shape bend pipe is passed in high-speed jet by nozzle, wrap up in the air that band comes from inlet pipeline diffusion and be sent to impeller inlet at a high speed, and the high-speed jet high vacuum all around that causes of jet, this air of having accelerated again in the inlet pipeline spreads to jet, thereby accelerated to pump the speed of air, just accelerated the speed of water on the self-priming pump.
In the present embodiment start-up course, exit of pump diffusing tube (11) and rising pipe (13) are also being born the function of air-water separation.Impeller is got to the water of gassiness in the exit of pump diffusing tube (11), and gas is light, will overflow from rising pipe (13); Water is heavy, will get back to the import of nozzle sets (5) from the exit cone of water pump to the major path (10) the import of nozzle, wraps up in the band air to impeller inlet by jet again.In the major path (10) between the import of nozzle, also there is air-water separation to take place at the exit cone of water pump.Gas is light, will upwards escape to the exit cone (11) of water pump from major path (10); Water is heavy, will be downward from major path (10), flow to the import of nozzle (5).
When the present embodiment proper functioning, the exit cone of water pump will raise to the major path internal pressure between the import of nozzle, approximate the self-priming lift of pump.But the pressure in the S shape bend pipe is all basic identical from starting to proper functioning, all is vacuum state, approximates the suction journey of self-priming pump.Therefore going up the axial force that acts at valve plate (8) will close valve plate (8) greater than the elastic force of spring (7) automatically, so the water in the self-priming pump no longer circulates by nozzle, self-priming pump just can the same high efficiency work with Ordinary Centrifugal Pumps.Since unblocked in the S shape bend pipe, so the efficient of the pump efficiency of present embodiment and Ordinary Centrifugal Pumps is basic identical.
If shock mount valve plate not, when the self-priming pump proper functioning, water in the self-priming pump continues to circulate by nozzle, this can increase hydraulic loss, reduce pump efficiency, but the jet of nozzle will improve the pressure of impeller inlet, improve the cavitation conditions of impeller, guarantee self-priming pump proper functioning under the high suction depth situation.Simultaneously, the pressure height of impeller inlet, the pressure of exit of pump also can improve, and just can improve lift.
Claims (4)
1. big-flow self-priming centrifugal pump, in the shell of self-priming pump, a S shape bend pipe is arranged, the last client link inlet pipeline of S shape bend pipe, the lower end of S shape bend pipe and impeller inlet align straight-through, it is characterized in that: in the S shape bend pipe outside over against impeller inlet, adorn one group of (promptly a plurality of) nozzle, impeller inlet is all pointed in the outlet of nozzle, an exit cone from water pump is arranged to the major path the import of nozzle in the self-priming pump shell.
2. self-priming pump according to claim 1 is characterized in that: there is a bit of straight tube the lower end of S shape bend pipe, and its diameter is identical with the impeller inlet diameter, and its length is not more than 10 millimeters.
3. self-priming pump according to claim 1 is characterized in that: the inlet at this group nozzle, can adorn a spring valve plate, also shock mount valve plate not.If the shock mount valve plate, the axial force of liquid effects on valve plate when then the elastic force of spring is greater than the self-priming pump startup, the axial force of liquid effects on valve plate during less than the self-priming pump proper functioning.
4. self-priming pump according to claim 1 is characterized in that: this group nozzle will be contained in the outside of S shape bend pipe lower end, can not put in the inside of S shape bend pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510122653 CN1776233A (en) | 2005-11-30 | 2005-11-30 | High-flow self-priming centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510122653 CN1776233A (en) | 2005-11-30 | 2005-11-30 | High-flow self-priming centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN1776233A true CN1776233A (en) | 2006-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510122653 Pending CN1776233A (en) | 2005-11-30 | 2005-11-30 | High-flow self-priming centrifugal pump |
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| CN (1) | CN1776233A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581312B (en) * | 2009-06-10 | 2011-06-29 | 江苏大学 | Mass-flow self-sucking pump |
| CN105673585A (en) * | 2014-07-23 | 2016-06-15 | 蒋盘君 | Multi-channel jet flow vacuum pump |
-
2005
- 2005-11-30 CN CN 200510122653 patent/CN1776233A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581312B (en) * | 2009-06-10 | 2011-06-29 | 江苏大学 | Mass-flow self-sucking pump |
| CN105673585A (en) * | 2014-07-23 | 2016-06-15 | 蒋盘君 | Multi-channel jet flow vacuum pump |
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