CN218093466U - Two-stage self-priming pump - Google Patents
Two-stage self-priming pump Download PDFInfo
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- CN218093466U CN218093466U CN202222332260.1U CN202222332260U CN218093466U CN 218093466 U CN218093466 U CN 218093466U CN 202222332260 U CN202222332260 U CN 202222332260U CN 218093466 U CN218093466 U CN 218093466U
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- partition plate
- liquid inlet
- pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000002955 isolation Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 74
- 238000005192 partition Methods 0.000 claims description 29
- 238000000926 separation method Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 33
- 239000010687 lubricating oil Substances 0.000 abstract description 10
- 230000037452 priming Effects 0.000 abstract description 5
- 238000005461 lubrication Methods 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model relates to a self priming pump technical field specifically is a second grade self priming pump, adopt the sealed isolation chamber of two terminal surface machine sealings, the sealed lubrication structure of batch oil tank and air water isolation tank, second grade feed liquor chamber pressure is the pressure that the one-level impeller produced, general design pressure is not more than 0.15MPa, the outside water supply pressure of air water isolation tank adopts 0.2-0.5MPa, make the pressure in two terminal surface machine sealings isolation intracavity be greater than the pressure in outside atmosphere and second grade feed liquor intracavity respectively, two terminal surface mechanical seal is in lubricating oil or clear water lubricated state all the time, avoided two terminal surface machine sealings to separate after the pressure that the intracavity is less than the pressure of second grade feed liquor intracavity leads to the internal contamination, the problem that two terminal surface mechanical seal life descends.
Description
Technical Field
The utility model relates to a self priming pump technical field especially relates to a second grade self priming pump.
Background
The second-stage self-priming pump belongs to a self-priming centrifugal pump, has the advantages of compact structure, convenient operation, stable operation and the like, and is widely applied to various fields of urban environmental protection, building, fire fighting and the like.
At present, a two-stage self-priming pump generally adopts double-end-face mechanical seal for shaft seal, a double-end-face mechanical seal isolation cavity is arranged outside the double-end-face mechanical seal, and in the working process, machine seal flushing water enters from one side of the double-end-face mechanical seal isolation cavity and flows out from the other side of the double-end-face mechanical seal isolation cavity so as to lubricate the double-end-face mechanical seal, so that effective and stable pressure cannot be formed in the double-end-face mechanical seal isolation cavity; however, under the condition that the pressure of the machine seal flushing water is unstable, the condition that the pressure in the double-end-face machine seal separation cavity is lower than the pressure in the pump cavity can occur, at the moment, liquid in the pump cavity can gradually permeate into the double-end-face machine seal separation cavity, dirt such as silt contained in the liquid in the pump cavity can greatly reduce the lubricating effect and damage the double-end-face mechanical seal friction surface.
SUMMERY OF THE UTILITY MODEL
To the above problem, the embodiment of the utility model provides a second grade self priming pump.
In one aspect of the implementation of the utility model, a second-stage self-priming pump is provided, including lower pump seat and the upper pump seat located thereon, the inside of the lower pump seat constitutes a liquid storage cavity, the lower pump seat is provided with a liquid inlet pipeline through the communication on the lateral wall of the lower pump seat, a first-stage liquid inlet is communicated between the middle part of the top surface of the lower pump seat and the upper pump seat, a pump shaft is rotatably installed at the middle part of the top surface of the upper pump seat through double-end-surface mechanical seal, a double-end-surface mechanical seal isolation cavity is arranged in the upper pump seat and at the periphery of the double-end-surface mechanical seal, a first partition plate and a second partition plate are sequentially arranged in the upper pump seat from bottom to top, so as to sequentially divide the inside of the upper pump seat into a first-stage liquid outlet cavity, a second-stage liquid outlet cavity and a second-stage liquid inlet cavity, a liquid guide channel is arranged on the outer wall of the upper pump seat, the liquid guide channel is communicated with the first-stage liquid outlet cavity and the second-stage liquid inlet cavity; openings are formed in the first partition plate and the second partition plate opposite to the primary liquid inlet, and the bottom end of the pump shaft sequentially penetrates through the openings in the second partition plate and the first partition plate and extends to the position above the primary liquid inlet; a second-stage guide vane body is hermetically arranged between the openings on the first partition plate and the second partition plate, a liquid inlet of the second-stage guide vane body is matched with the opening on the second partition plate, and a second-stage impeller is arranged on the pump shaft and positioned in the second-stage guide vane body; a first-stage guide vane body is hermetically arranged between the bottom of the second-stage guide vane body and the first-stage liquid inlet, the liquid inlet of the first-stage guide vane body is matched with the first-stage liquid inlet, and a first-stage impeller is arranged at the bottom end of the pump shaft and positioned in the first-stage guide vane body; go up the pump seat outside and be located the pump seat top and be provided with the batch oil tank, batch oil tank bottom portion and bi-polar face machine seal separate the intercommunication between the chamber have defeated oil pipe, go up on the pump seat outer wall and be located the batch oil tank below and be provided with air water isolation tank, the top of air water isolation tank and the intercommunication before the batch oil tank bottom have the breather pipe, install the delivery pipe on the air water isolation tank.
Compared with the prior art, the beneficial effects of the utility model reside in that: adopt the sealed lubrication structure of two terminal surfaces machine seal isolation chamber, oil storage tank and air water isolation tank, second grade feed liquor chamber pressure is the pressure that the one-level impeller produced, general design pressure is not more than 0.15MPa, the outside water supply pressure of air water isolation tank adopts 0.2-0.5MPa, make the pressure in two terminal surfaces machine seal isolation chamber be greater than outside atmosphere and the pressure in the second grade feed liquor intracavity respectively, double mechanical seal is in lubricating oil or clear water lubricated state all the time, avoided the pressure in the double mechanical seal isolation chamber to be less than the pressure in the second grade feed liquor intracavity and lead to the internal contamination back, double mechanical seal life descends the problem.
Optionally, the top orifice of the vent pipe is located above the liquid in the oil storage tank, and the bottom orifice of the vent pipe is located above the liquid in the gas-water separation tank.
Optionally, an exhaust valve is arranged on the top surface of the upper pump seat.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
fig. 1 is a schematic structural view of a two-stage self-priming pump according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a guide vane body according to an embodiment of the present invention.
The device comprises a lower pump base 1, an upper pump base 2, a liquid storage cavity 3, a liquid inlet pipeline 4, a primary liquid inlet 5, a double-end-face mechanical seal 6, a pump shaft 7, a double-end-face mechanical seal isolation cavity 8, a first partition plate 9, a second partition plate 10, a primary liquid outlet cavity A, a secondary liquid inlet cavity B, a secondary liquid outlet cavity C, a liquid guide flow channel 11, a liquid outlet pipeline 12, a secondary guide vane body 13, a secondary impeller 14, a primary guide vane body 15, a primary impeller 16, an oil storage tank 17, an oil conveying pipe 18, an air-water isolation tank 19, a vent pipe 20, a water supply pipe 21 and a vent valve 22.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but are not intended to limit the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a two-stage self-priming pump, including a lower pump seat 1 and an upper pump seat 2 located thereon, a liquid storage cavity 3 is formed inside the lower pump seat 1, a liquid inlet pipeline 4 is provided on a side wall of the lower pump seat 1 in a communication manner, a one-stage liquid inlet 5 is provided between a middle portion of a top surface of the lower pump seat 1 and the upper pump seat 2 in a communication manner, a pump shaft 7 is rotatably installed at the middle portion of the top surface of the upper pump seat 2 through a double-end-surface mechanical seal 6, a double-end-surface mechanical seal isolation cavity 8 is provided in the upper pump seat 2 and at a periphery of the double-end-surface mechanical seal 6, a first partition plate 9 and a second partition plate 10 are sequentially provided in the upper pump seat 2 from bottom to top, so as to sequentially divide the inside of the upper pump seat 2 into a one-stage liquid outlet cavity a, a two-stage liquid outlet cavity C and a two-stage liquid inlet cavity B, a liquid guide channel 11 is provided on an outer wall of the upper pump seat 2, the liquid guide channel 11 communicates the one-stage liquid outlet cavity a and the two-stage liquid inlet cavity B, and a pipeline 12 communicated with the two-stage liquid outlet cavity C is provided on an outer wall of the upper pump seat 2; openings are formed in the positions, opposite to the primary liquid inlet 5, of the first partition plate 9 and the second partition plate 10, and the bottom end of the pump shaft 7 sequentially penetrates through the openings in the second partition plate 10 and the first partition plate 9 to extend to the position above the primary liquid inlet 5; a secondary guide vane body 13 is arranged between the openings on the first partition plate 9 and the second partition plate 10 in a sealing manner, a liquid inlet of the secondary guide vane body 13 is matched with the opening on the second partition plate 10, and a secondary impeller 14 is arranged on the pump shaft 7 and positioned in the secondary guide vane body 13; a primary guide blade body 15 is arranged between the bottom of the secondary guide blade body 13 and the primary liquid inlet 5 in a sealing manner, the liquid inlet of the primary guide blade body 15 is matched with the primary liquid inlet 5, and a primary impeller 16 is arranged at the bottom end of the pump shaft 7 and in the primary guide blade body 15; go up the pump mount 2 outside and be located 2 tops of last pump mount and be provided with batch oil tank 17, the intercommunication has defeated oil pipe 18 between batch oil tank 17 bottom and the double-end face machine seal isolated cavity 8, goes up and is provided with air water isolation tank 19 on the 2 outer walls of pump mount and be located batch oil tank 17 below, and air water isolation tank 19's top and batch oil tank 17 bottom preceding intercommunication have breather pipe 20, install delivery pipe 21 on the air water isolation tank 19.
In implementation, an oil filling valve can be arranged at the top of the oil storage tank 17, an oil pointer communicated with the oil storage tank 17 is arranged on the side wall of the oil storage tank to facilitate checking of the residual oil in the oil storage tank 17, and lubricating oil can be filled into the oil storage tank 17 through the oil filling valve;
the top mouth of pipe of breather pipe 20 is located the top of the interior liquid of batch oil tank 17, the bottom mouth of pipe of breather pipe 20 is located the top of the interior liquid of air water isolation tank 19, can design the proportional relation of 19 volumes of air water isolation tank and 17 volumes of batch oil tank, ensure that the clear water in the air water isolation tank 19 enters into batch oil tank 17 before the evacuation of lubricating oil in batch oil tank 17, avoid the air to get into and cause 6 dry friction phenomena of double-end-face mechanical seal in the chamber 8 is kept apart to the double-end-face mechanical seal, even can realize simultaneously under the condition of not filling lubricating oil in the later stage, guarantee to lubricate through the clear water, increase 6 life of double-end-face mechanical seal.
The top surface of the upper pump seat 2 is provided with an exhaust valve 22, and the exhaust valve 22 is used for ensuring the self-priming performance of the pump when the pump is in a self-priming state and is closed after the pump is normally operated when water is fed.
In the operation process of the pump, as shown by arrows in figure 1, liquid enters the liquid storage cavity 3 from the liquid inlet pipeline 4, is pressurized by the primary impeller 16 through the primary liquid inlet 5, then is discharged into the primary liquid outlet cavity A through the primary guide vane body 15, then enters the secondary liquid inlet cavity B through the liquid guide flow channel 11, is pressurized by the secondary impeller 14 again, then is discharged into the secondary liquid outlet cavity C through the secondary guide vane body 13, and is discharged from the liquid outlet pipeline 12;
the water supply pipe 21 can be connected to a clean water pump, the clean water pump supplies water to the air-water isolation tank 19 and provides design pressure, the pressure in the double-end-face mechanical seal isolation cavity 8 is ensured to be larger than the pressure in the second-stage liquid inlet cavity B, the air in the air-water isolation tank 19 is sealed at the upper part in the tank, namely, the lower part in the air-water isolation tank 19 is water and the upper part is air, when the double-end-face mechanical seal 6 works for a long time, because the structure of the double-end-face mechanical seal isolation cavity 8 has micro leakage, the oil level of lubricating oil in the oil storage tank 17 is gradually reduced, and if the lubricating oil is timely supplemented, the double-end-face mechanical seal 6 is in an oil lubrication state; along with the long-time use of the mechanical seal, the leakage amount of the double-end-face mechanical seal isolation cavity 8 is gradually increased, the consumption amount of lubricating oil is increased, the lubricating oil can not be supplemented into the oil storage tank 17 any more at the moment, and clean water in the gas-water isolation tank 19 enters the oil storage tank 17 and the double-end-face mechanical seal isolation cavity 8 along with the consumption of the lubricating oil, so that clean water lubrication is realized, the lubricating cost is reduced, and the service life of the double-end-face mechanical seal 6 is prolonged.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (3)
1. A second-stage self-priming pump comprises a lower pump base and an upper pump base located on the lower pump base, wherein a liquid storage cavity is formed inside the lower pump base, a liquid inlet pipeline is communicated and arranged on the side wall of the lower pump base, a first-stage liquid inlet is communicated and arranged between the middle part of the top surface of the lower pump base and the upper pump base, a pump shaft is rotatably installed in the middle part of the top surface of the upper pump base through double-end-surface mechanical seal, a double-end-surface mechanical seal isolation cavity is arranged in the upper pump base and located on the periphery of the double-end-surface mechanical seal, a first partition plate and a second partition plate are sequentially arranged in the upper pump base from bottom to top, so that the inside of the upper pump base is sequentially divided into a first-stage liquid outlet cavity, a second-stage liquid outlet cavity and a second-stage liquid inlet cavity from bottom to top, a liquid guide channel is arranged on the outer wall of the upper pump base and is communicated with the first-stage liquid outlet cavity, and a liquid outlet pipeline is arranged on the outer wall of the upper pump base; openings are formed in the positions, opposite to the primary liquid inlet, of the first partition plate and the second partition plate, and the bottom end of the pump shaft sequentially penetrates through the openings in the second partition plate and the first partition plate and extends to the position above the primary liquid inlet; a second-stage guide vane body is arranged between the openings on the first partition plate and the second partition plate in a sealing manner, a liquid inlet of the second-stage guide vane body is matched with the opening on the second partition plate, and a second-stage impeller is arranged on the pump shaft and positioned in the second-stage guide vane body; a first-stage guide blade body is hermetically arranged between the bottom of the second-stage guide blade body and the first-stage liquid inlet, the liquid inlet of the first-stage guide blade body is matched with the first-stage liquid inlet, and a first-stage impeller is arranged at the bottom end of the pump shaft and positioned in the first-stage guide blade body; the oil storage tank is arranged on the outer side of the upper pump base and above the upper pump base, an oil conveying pipe is communicated between the bottom of the oil storage tank and the double-end face machine seal separation cavity, an air-water separation tank is arranged on the outer wall of the upper pump base and below the oil storage tank, a vent pipe is communicated between the top of the air-water separation tank and the bottom of the oil storage tank, and a water supply pipe is installed on the air-water separation tank.
2. The two stage self-primer pump of claim 1 wherein the top orifice of the vent tube is positioned above the liquid in the reservoir and the bottom orifice of the vent tube is positioned above the liquid in the vapor-water separator tank.
3. The two stage self-primer pump of claim 1 wherein the top surface of the upper pump block is provided with a vent valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222332260.1U CN218093466U (en) | 2022-09-02 | 2022-09-02 | Two-stage self-priming pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222332260.1U CN218093466U (en) | 2022-09-02 | 2022-09-02 | Two-stage self-priming pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218093466U true CN218093466U (en) | 2022-12-20 |
Family
ID=84451002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222332260.1U Active CN218093466U (en) | 2022-09-02 | 2022-09-02 | Two-stage self-priming pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218093466U (en) |
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2022
- 2022-09-02 CN CN202222332260.1U patent/CN218093466U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231207 Address after: 050600 south of East section of Xinhe street, Xingtang County Economic Development Zone (South District), Shijiazhuang City, Hebei Province Patentee after: Shanglishi group (Shijiazhuang) Pump Technology Co.,Ltd. Address before: 063000 No. 501, gate 5, 6th floor, Changning building, Changning Road bujiazhuang, Lubei District, Tangshan City, Hebei Province Patentee before: Song Qiuwei |