CN107588008B - Double-outlet multipurpose external mixing self-priming pump with quasi-spiral suction chamber - Google Patents
Double-outlet multipurpose external mixing self-priming pump with quasi-spiral suction chamber Download PDFInfo
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Abstract
The invention provides a double-outlet multipurpose external mixing type self-priming pump with a quasi-spiral suction chamber, which mainly comprises an inlet flange, a pump body, an impeller, a gas-liquid separation tube, a rear cover, a suspension body component, an outlet flange and a flange cover, wherein the pump body is formed by integrally casting the quasi-spiral suction chamber, a spiral extrusion chamber and a liquid storage chamber, and the pump body is provided with double outlets.
Description
Technical Field
The invention relates to the field of fluid machinery, in particular to a double-outlet multipurpose external mixing type self-priming pump with a quasi-spiral suction chamber.
Background
The external mixing type self-priming pump is a self-priming pump, and has the advantages of compact structure, convenient operation, convenient maintenance, strong self-priming performance and the like, thereby being widely applied to the fields of agricultural drainage and irrigation, pond culture, municipal pollution discharge, petrochemical metallurgy, food chemical industry, power plants and the like.
The traditional external mixing type self-priming pump mainly comprises an impeller, a pump shaft, a pump body, a rear cover, a bearing body and the like, and an S-shaped suction bent pipe type suction chamber is adopted in a suction chamber arranged in the pump body, as shown in an attached figure 1, the flow of water in the suction chamber is changed in the direction of 90 degrees twice in a shorter time, so that the pump body is greatly impacted, the liquid flows in disorder, the impact loss is serious, the pump efficiency is low, the hydraulic imbalance impact of a water single side is caused when the pump is started and stopped for a long time, the axial force of the impeller is obviously increased, the damage to a bearing and a sealing part is easily caused, the service life of the bearing and the sealing part is seriously reduced, and the long-term stable operation of the pump is not facilitated. Meanwhile, the traditional external mixing type self-priming pump is usually provided with a backflow hole on only one side of the volute, the impact of the unilateral backflow on the impeller can also cause the axial force of the impeller to be obviously increased, the service life of a bearing and a sealing element is seriously reduced, the unilateral backflow action of liquid can destroy the uniform symmetrical flow state in the volute, a unilateral vortex structure which changes along with the time period is generated in the cross section of the volute, the vortex structure becomes more complex under the dynamic and static interference of the impeller in the volute, the hydraulic loss in the volute is increased, and serious pressure pulsation is induced, so that the vibration and noise of a unit are caused.
In addition, the traditional external mixing type self-priming pump only has one installation mode, namely an axial inlet and a vertical upward outlet, the installation mode and the application of adaptation are single, and the special requirements of operations such as fire fighting and emergency can not be met better.
Through searching, no public report of a double-outlet multipurpose external mixing type self-priming pump with a quasi-spiral suction chamber is found.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides the double-outlet multipurpose external mixing type self-priming pump with the quasi-spiral suction chamber, which improves the self-priming performance of the self-priming pump, effectively improves the hydraulic performance of the pump, greatly reduces the flow loss of fluid medium in the suction chamber and the pumping chamber, has the advantages of high lift, high efficiency and high reliability, compact structure, convenient installation and maintenance, various purposes, and can be used as a common self-priming pump, a pipeline self-priming pump for horizontal inlet and outlet and the like, and can be used for a mobile pump truck, fire-fighting rescue operation and the like besides being used as a common self-priming pump.
The invention is realized by the following technical scheme:
The utility model provides a take dual-outlet multipurpose external mixing formula self priming pump of accurate spiral suction chamber, mainly includes import flange takeover (11), pump body (1), impeller (4), gas-liquid separation pipe (5), back lid (6), suspension body part (10), export flange takeover (18), flange lid (19);
The pump body is formed by casting a quasi-spiral suction chamber (2), a spiral pumping chamber (3) and a liquid storage chamber (20) in an integral mode, the quasi-spiral suction chamber (2) is communicated with the spiral pumping chamber (3) and is positioned inside the pump body (1), and a space between the outer parts of the quasi-spiral suction chamber (2) and the spiral pumping chamber (3) and the inner part of the pump body (1) is the liquid storage chamber (20);
The pump body (1) is provided with a pump body inlet (21) which is higher than the impeller inlet and is positioned at the side of the pump body, and two outlets (22 and 23), wherein the pump body outlet (22) is positioned at the top of the pump body and is directly above the outlet of the spiral pumping chamber (3), the pump body outlet (23) is positioned at the other side opposite to the pump body inlet (21) and has the same center height with the pump body inlet (21), and the two outlets can be arranged to realize two types of outlet installation modes which are suitable for different purposes and practical production requirements;
two reflux holes (14) are respectively formed in two sides of the bottom of the spiral pumping chamber (3) and are in a form of double-side reflux holes;
a water adding plug (15) is arranged at one side of the top of the pump body (1) and is used for adding water for the first time when the self-priming pump is used;
In addition, the invention also provides a recommended calculation formula of the clearance s between the partition tongue of the spiral pumping chamber (3) and the outer diameter of the impeller (4) and the center height difference H between the pump inlet (21) and the suction inlet of the impeller (4):
the separation tongue of the spiral pumping chamber (3) and the outer diameter clearance s of the impeller (4) are valued according to the following relation:
S＝0.118·D2 0.366；
Wherein:
S-a clearance between a partition tongue of the spiral pumping chamber and the outer diameter of the impeller is mm;
D 2 -impeller outer diameter, mm;
The center height difference H between the pump body inlet (21) and the suction inlet of the impeller (4) is calculated according to the following relation:
Wherein:
h is the center height difference between the pump body inlet and the impeller suction inlet, and mm;
D 2 -impeller outer diameter, mm;
d S -the inner diameter of the inlet flange connecting pipe, mm;
ns-impeller specific speed;
the installation mode is as follows:
form one (used as a common self priming pump):
The rear cover (6) is connected to the suspension body component (10) through bolt installation, the impeller (4) is fixedly installed at one end of the main shaft (9) through a shaft end nut (8), the impeller is arranged in the inner cavity of the spiral pumping chamber (3), the other end of the main shaft (9) is installed in the rear cover (6) and the suspension body component (10) through a bearing and the like, a mechanical seal (7) is arranged in the rear cover (6), and the suspension body component (10) is fixedly connected with the pump body (1) through bolts;
The inlet flange connecting pipe (11) is arranged at the inlet of the pump body (1) so as to be communicated with the quasi-spiral suction chamber (2), the gas-liquid separation pipe (5) is arranged at the outlet of the spiral pumping chamber (3), the outlet flange connecting pipe (18) is arranged at the pump body outlet (22) of the pump body (1), and the pump body outlet (23) of the pump body (1) is blocked by the flange cover (19);
Form two (used as tubing self priming pump):
The installation mode is generally the same as that of the first mode, only the gas-liquid separation tube (5) on the outlet of the spiral pumping chamber (3) in the first mode is required to be removed, the outlet flange connecting tube (18) on the pump body outlet (22) is removed and is installed on the pump body outlet (23), and the flange cover (19) originally on the pump body outlet (23) is installed on the pump body outlet (22).
Preferably, a flap (12) is arranged between the inlet flange connection (11) and the pump body inlet (21).
Preferably, a flow dividing plate (17) is arranged on the flow channel middle line of the quasi-spiral suction chamber (2), so that the uniformity of flow can be improved.
Preferably, a drain plug (16) is arranged at the bottom of the front surface of the pump body (1) and is used for draining the self-priming pump.
Preferably, the backflow holes (14) are identical in size and shape, and the radial dimension is close to the outer edge of the impeller and symmetrically arranged on two sides of the bottom of the spiral pumping chamber (3).
Preferably, the gas-liquid separation tube (5) is provided with a plurality of strip-shaped gas-liquid separation holes (13), and the number of the gas-liquid separation holes (13) is 4-8.
Compared with the prior art, the invention has the beneficial effects that:
1. the self-priming pump has the advantages of improving the self-priming performance of the self-priming pump, effectively improving the hydraulic performance of the pump, greatly reducing the flow loss of fluid medium in the suction chamber and the pumping chamber, along with high lift, high efficiency, high reliability, compact structure, convenient installation and maintenance, multiple purposes, capability of being used as a common self-priming pump, capability of being used as a pipeline self-priming pump for horizontal inlet and outlet only by slightly adjusting the installation mode, and the like, and stable operation due to the fact that the application of the quasi-spiral suction chamber for lateral suction has small impact vibration compared with the traditional S-shaped suction chamber, and is beneficial to long-term safe and stable operation of the whole machine.
2. According to the invention, two backflow holes are respectively formed in the two sides of the bottom of the spiral pumping chamber of the pump body, the two backflow holes which are identical in shape and size and are bilaterally symmetrical are shared, the water storage chamber is communicated with the pumping chamber, so that water in the water storage chamber can flow back to the outer edge of the impeller, the axial force of the impeller can be obviously increased due to the impact of single-side backflow on the impeller, the service life of a bearing and a sealing element is seriously reduced, the uniform symmetrical flow state in the volute is damaged by the single-side backflow action of liquid, a single-side vortex structure which changes along with the time period is generated in the cross section of the volute, the vortex structure becomes more complex under the dynamic and static interference of the impeller on the volute, the water loss in the volute is increased, serious pressure pulsation is induced, the vibration and noise of a unit are induced, and the backflow holes are respectively formed in the two sides of the spiral pumping chamber, so that the flow state in the volute can be greatly improved, the hydraulic loss in the volute is reduced, and the long-term stable operation of the unit is facilitated.
3. The quasi-spiral suction chamber is internally provided with the flow dividing plate, so that the flow dividing plate has a good flow guiding effect on liquid flow and is beneficial to stable and uniform flow of the liquid.
4. The invention also provides a recommended calculation formula of the clearance s between the partition tongue of the spiral pumping chamber and the outer diameter of the impeller and the center height difference H between the inlet of the pump body and the suction inlet of the impeller, which is beneficial to improving the self-priming performance of the pump and shortening the self-priming time.
Drawings
FIG. 1 is a schematic view of an S-shaped suction elbow suction chamber of a conventional self-priming pump;
FIG. 2 is a plan view of a quasi-helical suction chamber of an embodiment of a dual-outlet multipurpose external mixing self-priming pump with a quasi-helical suction chamber of the present invention;
FIG. 3 is a cross-sectional view of one embodiment form one of a dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber of the present invention;
FIG. 4 is a left side view of one embodiment of a dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber in accordance with the present invention;
FIG. 5 is a left side view of a second embodiment of a dual-outlet multipurpose external mixing self-priming pump with a quasi-helical suction chamber of the present invention;
In the figure, 1. A pump body; 2. a quasi-helical suction chamber; 3. a spiral pumping chamber; 4. an impeller; 5. a gas-liquid separation pipe; 6. a rear cover; 7. mechanical sealing; 8. a shaft end nut; 9. a main shaft; 10. a suspension body member; 11. an inlet flange connecting pipe; 12. a flap valve; 13. a gas-liquid separation hole; 14. a reflow hole; 15. adding water plug; 16. a drain plug; 17. a diverter plate; 18. an outlet flange connecting pipe; 19. a flange cover; 20. a liquid storage chamber; 21. a pump body inlet; 22. a pump body outlet; 23. and a pump body outlet.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description, but the scope of the invention is not limited thereto.
FIG. 2 is a plan view of a quasi-helical suction chamber of an embodiment of a dual-outlet multipurpose external mixing self-priming pump with a quasi-helical suction chamber of the present invention, showing the direction of flow of the liquid stream in the quasi-helical suction chamber of the present invention;
FIGS. 3 and 4 are a cross-sectional view and a left side view of a form one embodiment of a dual-outlet multipurpose external mixing self-priming pump with a quasi-helical suction chamber of the present invention;
the utility model provides a double-outlet multipurpose external mixing type self priming pump with a quasi-spiral suction chamber, which mainly comprises an inlet flange connecting pipe 11, a pump body 1, an impeller 4, a gas-liquid separation pipe 5, a rear cover 6, a suspension body component 10, an outlet flange connecting pipe 18 and a flange cover 19;
The pump body is formed by casting a quasi-spiral suction chamber 2, a spiral pumping chamber 3 and a liquid storage chamber 20 in an integral way, the quasi-spiral suction chamber 2 and the spiral pumping chamber 3 are communicated and are all positioned in the pump body 1, and a space between the outer parts of the quasi-spiral suction chamber 2 and the spiral pumping chamber 3 and the inner part of the pump body 1 is the liquid storage chamber 20;
The pump body 1 is provided with a pump body inlet 21 which is higher than the impeller inlet and is positioned at the side of the pump body, and two outlets 22 and 23, wherein the pump body outlet 22 is positioned at the top of the pump body and is directly above the outlet of the spiral pumping chamber 3, the pump body outlet 23 is positioned at the other side opposite to the pump body inlet 21 and has the same center height as the pump body inlet 21, and the two outlets can be arranged to realize two types of outlet mounting modes, so that the pump is suitable for different purposes and practical production requirements;
Two sides of the bottom of the spiral pumping chamber 3 are respectively provided with a backflow hole 14 which is in a form of double-side backflow holes;
A water adding plug 15 is arranged on one side of the top of the pump body 1 and is used for adding water for the first time when the self-priming pump is used;
in addition, the invention also provides a recommended calculation formula of the clearance S between the partition tongue of the spiral pumping chamber 3 and the outer diameter of the impeller 4 and the center height difference H between the pump inlet 21 and the suction inlet of the impeller 4:
the clearance S between the partition tongue of the spiral pumping chamber 3 and the outer diameter of the impeller 4 is calculated according to the following relation:
S＝0.118·D2 0.366；
Wherein:
S-a clearance between a partition tongue of the spiral pumping chamber and the outer diameter of the impeller is mm;
D 2 -impeller outer diameter, mm;
The center height difference H between the pump inlet 21 and the suction inlet of the impeller 4 is calculated according to the following relation:
Wherein:
h is the center height difference between the pump body inlet and the impeller suction inlet, and mm;
D 2 -impeller outer diameter, mm;
d S -the inner diameter of the inlet flange connecting pipe, mm;
ns-impeller specific speed;
the installation mode is as follows:
form one (used as a common self priming pump):
The rear cover 6 is connected to the suspension body component 10 through bolt installation, the impeller 4 is fixedly arranged at one end of the main shaft 9 through the shaft end nut 8 and is arranged in the inner cavity of the spiral pumping chamber 3, the other end of the main shaft 9 is arranged in the rear cover 6 and the suspension body component 10 through bearings and the like, wherein the rear cover 6 is internally provided with a mechanical seal 7, and the suspension body component 10 is fixedly connected with the pump body 1 through bolts;
The inlet flange connecting pipe 11 is arranged at the inlet of the pump body 1 so as to be communicated with the quasi-spiral suction chamber 2, the gas-liquid separation pipe 13 is arranged at the outlet of the spiral pumping chamber 3, the outlet flange connecting pipe 18 is arranged at the pump body outlet 22 of the pump body 1, and the pump body outlet 23 of the pump body 1 is blocked by the flange cover 19;
Form two (used as tubing self priming pump):
The installation mode is generally the same as that of the first mode, only the gas-liquid separation tube 5 at the outlet of the spiral pumping chamber 3 in the first mode is required to be removed, the outlet flange connection tube 18 at the pump body outlet 22 is removed and installed on the pump body outlet 23, and the flange cover 19 originally at the pump body outlet 23 is installed on the pump body outlet 22.
Preferably, a flap 12 is mounted between the inlet flange nipple 11 and the pump body inlet 21.
Preferably, the flow path center line of the quasi-spiral suction chamber 2 is provided with a flow dividing plate 17, which improves flow uniformity.
Preferably, a drain plug 16 is arranged at the bottom of the front surface of the pump body 1 for draining the self-priming pump.
Preferably, the backflow holes 14 have the same size and shape, and the radial dimension is close to the outer edge of the impeller, and the backflow holes are symmetrically arranged at two sides of the bottom of the spiral pumping chamber 3.
Preferably, the gas-liquid separation tube 5 is provided with a plurality of elongated gas-liquid separation holes 13, and the number of the gas-liquid separation holes 13 is 4-8.
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. A take accurate spiral suction chamber's dual-outlet multipurpose external mixing formula self priming pump which characterized in that: the device comprises an inlet flange connecting pipe (11), a pump body (1), an impeller (4), a gas-liquid separation pipe (5), a rear cover (6), a suspension body component (10), an outlet flange connecting pipe (18) and a flange cover (19);
The pump body is formed by casting a quasi-spiral suction chamber (2), a spiral pumping chamber (3) and a liquid storage chamber (20) in an integral mode, the quasi-spiral suction chamber (2) is communicated with the spiral pumping chamber (3) and is positioned inside the pump body (1), and a space between the outer parts of the quasi-spiral suction chamber (2) and the spiral pumping chamber (3) and the inner part of the pump body (1) is the liquid storage chamber (20);
The pump body (1) is provided with a pump body inlet (21) which is higher than the impeller inlet and is positioned at the side of the pump body, a pump body outlet A (22) and a pump body outlet B (23), wherein the pump body outlet A (22) is positioned at the top of the pump body and is directly above the outlet of the spiral-shaped pumping chamber (3), and the pump body outlet B (23) is positioned at the other side opposite to the pump body inlet (21) and has the same center height with the pump body inlet (21);
two reflux holes (14) are respectively formed in two sides of the bottom of the spiral pumping chamber (3) and are in a form of double-side reflux holes;
a water adding plug (15) is arranged at one side of the top of the pump body (1) and is used for adding water for the first time when the self-priming pump is used;
In addition, a calculation formula of the clearance S between the partition tongue of the spiral pumping chamber (3) and the outer diameter of the impeller (4) and the center height difference H between the pump body inlet (21) and the suction inlet of the impeller (4) is also provided:
The separation tongue of the spiral pumping chamber (3) and the outer diameter clearance S of the impeller (4) are valued according to the following relation:
S＝0.118·D2 0.366；
Wherein:
S-a clearance between a partition tongue of the spiral pumping chamber and the outer diameter of the impeller is mm;
D 2 -impeller outer diameter, mm;
The center height difference H between the pump body inlet (21) and the suction inlet of the impeller (4) is calculated according to the following relation:
Wherein:
h is the center height difference between the pump body inlet and the impeller suction inlet, and mm;
D 2 -impeller outer diameter, mm;
d S -the inner diameter of the inlet flange connecting pipe, mm;
ns-impeller specific speed;
the installation mode is as follows:
Form one is used as a common self-priming pump:
The rear cover (6) is connected to the suspension body component (10) through bolt installation, the impeller (4) is fixedly installed at one end of the main shaft (9) through a shaft end nut (8), the impeller is arranged in the inner cavity of the spiral pumping chamber (3), the other end of the main shaft (9) is installed in the rear cover (6) and the suspension body component (10) through a bearing, a mechanical seal (7) is arranged in the rear cover (6), and the suspension body component (10) is fixedly connected with the pump body (1) through bolts;
the inlet flange connecting pipe (11) is arranged at the inlet of the pump body (1) so as to be communicated with the quasi-spiral suction chamber (2), the gas-liquid separation pipe (5) is arranged at the outlet of the spiral pumping chamber (3), the outlet flange connecting pipe (18) is arranged at the pump body outlet A (22) of the pump body (1), and the pump body outlet B (23) of the pump body (1) is blocked by the flange cover (19);
Form two is used as a tubing self priming pump:
The installation mode is generally the same as that of the first mode, only the gas-liquid separation tube (5) at the outlet of the spiral pumping chamber (3) in the first mode is required to be removed, the outlet flange connecting tube (18) at the pump body outlet A (22) is removed and is installed on the pump body outlet B (23), and the flange cover (19) originally arranged on the pump body outlet B (23) is installed on the pump body outlet A (22).
2. A dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber as defined in claim 1, wherein: a flap valve (12) is arranged between the inlet flange connecting pipe (11) and the pump body inlet (21).
3. A dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber as defined in claim 1, wherein: the flow path center line of the quasi-spiral suction chamber (2) is provided with a flow dividing plate (17) which can improve the uniformity of flow.
4. A dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber as defined in claim 1, wherein: the front bottom of the pump body (1) is provided with a drain plug (16) for draining the self-priming pump.
5. A dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber as defined in claim 1, wherein: the size and shape of the backflow holes (14) are the same, the radial dimension of the backflow holes is close to the outer edge of the impeller, and the backflow holes are symmetrically arranged on two sides of the bottom of the spiral pumping chamber (3).
6. A dual outlet multipurpose external mixing self priming pump with a quasi-helical suction chamber as defined in claim 1, wherein: the gas-liquid separation tube (5) is provided with a plurality of strip-shaped gas-liquid separation holes (13), and the number of the gas-liquid separation holes (13) is 4-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975741.5A CN107588008B (en) | 2017-10-19 | 2017-10-19 | Double-outlet multipurpose external mixing self-priming pump with quasi-spiral suction chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710975741.5A CN107588008B (en) | 2017-10-19 | 2017-10-19 | Double-outlet multipurpose external mixing self-priming pump with quasi-spiral suction chamber |
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| CN107588008A CN107588008A (en) | 2018-01-16 |
| CN107588008B true CN107588008B (en) | 2024-04-19 |
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| CN201710975741.5A Active CN107588008B (en) | 2017-10-19 | 2017-10-19 | Double-outlet multipurpose external mixing self-priming pump with quasi-spiral suction chamber |
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|---|---|---|---|---|
| DE102018214805A1 (en) | 2018-08-31 | 2020-03-05 | Magna Powertrain Bad Homburg GmbH | Conveyor |
| CN110829689A (en) * | 2019-11-19 | 2020-02-21 | 兰州理工大学 | Hydraulic motor pump shell with liquid flow-air flow-fin combined heat dissipation function |
| CN111075730A (en) * | 2019-11-20 | 2020-04-28 | 嘉善天晟精密铸件有限公司 | Horizontal single-suction self-priming pump |
| CN113309730A (en) * | 2021-06-24 | 2021-08-27 | 襄阳五二五泵业有限公司 | Vertical pipeline pump with uniformly distributed inlet flow field speed |
| CN114233684B (en) * | 2021-11-24 | 2024-02-27 | 河南航天液压气动技术有限公司 | High-speed high-pressure centrifugal pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS63280896A (en) * | 1987-05-11 | 1988-11-17 | Taiheiyo Kiko Kk | Suction casing for fluid machine |
| CN2718290Y (en) * | 2004-07-28 | 2005-08-17 | 阳泉市水泵厂 | Single-suction two stage centrifugal pump |
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