CN210623092U - Self-priming centrifugal pump capable of treating gas-liquid mixed medium - Google Patents
Self-priming centrifugal pump capable of treating gas-liquid mixed medium Download PDFInfo
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- CN210623092U CN210623092U CN201921179107.1U CN201921179107U CN210623092U CN 210623092 U CN210623092 U CN 210623092U CN 201921179107 U CN201921179107 U CN 201921179107U CN 210623092 U CN210623092 U CN 210623092U
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- centrifugal pump
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- vacuum
- priming
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- 239000007788 liquid Substances 0.000 title claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010041235 Snoring Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model discloses a can handle self-priming centrifugal pump of gas-liquid mixture medium, including the vacuum assistance from inhaling the system, vacuum pump direct mount is on the centrifugal pump and by centrifugal pump shaft drive, and the vacuum pump import passes through pipeline, solenoid valve and gas-liquid separation room intercommunication centrifugal pump chamber. The inlet of the cooling chamber of the vacuum pump is communicated with a high-pressure area positioned at the outlet of the centrifugal pump through a pipeline, and the outlet of the cooling chamber is communicated with a negative-pressure area positioned at the inlet of the centrifugal pump through a pipeline. The outlet of the centrifugal pump is provided with a one-way valve, and the inlet of the centrifugal pump is provided with a water flow switch. The self-priming centrifugal pump capable of treating gas-liquid mixed media has high self-priming speed, and the auxiliary self-priming system can run together with the centrifugal pump to continuously discharge gas at the inlet of the centrifugal pump. The self-priming centrifugal pump capable of treating gas-liquid mixed media has the advantages of wider application, higher efficiency and lower cost.
Description
Technical Field
The utility model relates to a general machinery technical field specifically is a can handle self-priming centrifugal pump of gas-liquid mixture medium, belongs to general mechanical equipment, and the wide application is in various fields such as industrial production, emergent drought resisting drainage waterlogging.
Background
The centrifugal pump is widely applied to national production as a general mechanical device, one of the main limitations of the use of the centrifugal pump is that the centrifugal pump can normally work to send water in a water absorption pool to a required height or a required pressure place under the condition that a pump cavity is filled with water; centrifugal pumps generally do not have the ability to draw in liquid on their own for operation.
The general non-submersible installation type centrifugal pump is provided with a self-priming pump with self-priming function and a centrifugal pump which is fed with water by means of positive pressure, and most of the dry installation type centrifugal pumps are required to be provided with a bottom valve for starting water pouring or to be assisted by a vacuum pump for self-priming. The failure of the bottom valve due to easy rusting and blockage and the inconvenience of heavy installation and maintenance of the bottom valve are gradually eliminated, and the mode of auxiliary self-absorption of the vacuum pump is gradually replaced the bottom valve to be widely applied.
The vacuum auxiliary self-priming pump utilizes an auxiliary self-priming system to pump and exhaust air to form negative pressure in a sealed pump cavity of the centrifugal pump, and water in a suction pool of the centrifugal pump fills the pump cavity under the action of atmospheric pressure so as to enable the centrifugal pump to start to operate.
The traditional vacuum pump for the vacuum auxiliary self-priming of the centrifugal pump has harsh requirements on the use environment, and additional equipment such as a filtering system, a water-vapor separation system and the like is required to be added at the air inlet of the vacuum pump; some vacuum pumps have small volume and can be conveniently arranged on the centrifugal pump, but the air displacement is small and the vacuumizing time is long; some vacuum pumps have high operation efficiency in a short time but have too large temperature rise to cause equipment damage after long-time operation; some vacuum pumps can run for a long time but need oil lubrication, use an oil-gas separator to discharge gas, recycle lubricating oil, and have the risk of lubricating oil leakage or waste generation to pollute the field environment. The application of the traditional vacuum auxiliary self-sucking pump is not economical and reasonable due to the defects of large volume, complex structure, high use cost, insufficient environmental protection and the like.
Particularly, the medium under some special working conditions contains a large amount of gas, and the liquid of the water source contains a large amount of gas, so that the water supply at the inlet of the centrifugal pump is discontinuous, an auxiliary self-suction system is required to run along with the centrifugal pump for a long time to assist in exhausting gas, and water cannot be sucked into the vacuum pump.
In view of the above, there is a need to design a vacuum auxiliary self-priming pump, in which the auxiliary self-priming system can be completely dry-rotated without using lubricating oil, the exhaust volume is large, the vacuum pumping speed is high, the belt cooling device can continuously operate for a long time, and the pump is insensitive to media and has low requirements on the use environment; the volume is small, power does not need to be configured independently, and the portable installation is realized; therefore, the vacuum auxiliary self-sucking pump is simple in structure, low in use cost and higher in work efficiency.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above object, the utility model provides a following technical scheme:
preferably, the vacuum pump is a non-lubricated, non-sealed, externally cooled vacuum pump. The external cooling water is derived from the medium of the centrifugal pump.
Preferably, the mechanical seal waterless dry-rotation protection device (8) arranged on the centrifugal pump (1) enables the centrifugal pump (1) to dry-rotate for a long time when no medium exists in a pump cavity of the centrifugal pump, and the mechanical seal cannot be damaged due to dry friction.
Preferably, the centrifugal pump (1) may be various centrifugal pumps which transport liquid by generating centrifugal force using rotation of an impeller.
Compared with the prior art, the beneficial effects of the utility model are that: the self-priming centrifugal pump capable of treating gas-liquid mixed media is an auxiliary self-priming centrifugal pump which is specially developed in the field of general mechanical pumps, has shorter vacuumizing time, simpler structure, higher efficiency and more environmental protection:
1. the exhaust volume of the auxiliary self-suction system is 3.5m3Min, the centrifugal pump can be rapidly assisted to finish vacuumizing; vacuum degree of 8.5mH2O；
2. The vacuum pump is clean and environment-friendly, and does not need to be added with a lubricant when in use, so that waste is not generated to pollute the environment;
3. the vacuum auxiliary self-suction system is provided with a cooling device, water pumped by a centrifugal pump is used for circulating cooling, and the vacuum pump can be used for auxiliary vacuum pumping for a long time;
4. the adaptability is strong, and the auxiliary centrifugal pump can continuously run by utilizing the vacuum pump to discharge the gas in the inlet of the centrifugal pump and the pump cavity for the medium containing a large amount of gas;
5. the auxiliary self-priming system can be made of different materials according to the corrosivity of a pumping medium of the centrifugal pump, so that the auxiliary self-priming system is suitable for all working conditions.
6. The structure is simple, and other accessories are not required to be added; the maintenance is simple, and the use cost is low; the cost performance is high, and the suitability is strong.
The utility model discloses can handle the supplementary of self-priming centrifugal pump of gas-liquid mixture medium directly parasitize on the centrifugal pump from the system of inhaling, connect centrifugal pump spindle drive through the belt, supplementary from the system of inhaling can accomplish supplementary from inhaling in 10 seconds to can operate together along with the centrifugal pump and last the gas outgoing with the centrifugal pump import. The self-priming centrifugal pump capable of treating gas-liquid mixed media can enable the application of the centrifugal pump to be wider, the efficiency to be higher and the cost to be lower.
Drawings
FIG. 1 is a front view of the present invention
FIG. 2 is a side view of the structure of the present invention
FIG. 3 is a side sectional view of the vacuum pump of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-3, a self-priming centrifugal pump capable of treating gas-liquid mixed media comprises a vacuum auxiliary self-priming system, a vacuum pump 7 is directly installed on the centrifugal pump 1 or other suitable positions, the vacuum pump main shaft 3 is connected with the centrifugal pump main shaft 2 through a belt 4, a belt pulley 5 and an electromagnetic clutch 6, and a vacuum pump inlet 21 is communicated with a pump cavity of the centrifugal pump through a pipeline one 9, a normally closed electromagnetic valve 10 installed on the pipeline one 9 and a gas-liquid separation chamber 13. The inlet 19 of the cooling chamber of the vacuum pump 7 is communicated with the high-pressure area at the outlet 12 of the centrifugal pump through a pipeline II 11, and the outlet 18 of the cooling chamber is communicated with the negative-pressure area at the inlet 15 of the centrifugal pump through a pipeline III 16.
The centrifugal pump 1 can be provided with a mechanical seal waterless dry-running protection device 8, the outlet of the centrifugal pump 1 is provided with a one-way valve 17, the inlet of the centrifugal pump is provided with a water flow switch 14, and the oil tank of the mechanical seal waterless dry-running protection device 8 is arranged on the vacuum pump 7 or other suitable positions.
The vacuum pump 7 can be selected from a non-lubricating and non-sealing external cooling vacuum pump. The external cooling water is derived from the medium of the centrifugal pump.
The cooling water of the vacuum pump 7 is connected into the vacuum pump cooling chamber 20 from the inlet 19 through the high-pressure area of the centrifugal pump outlet 12 and flows back to the negative-pressure area of the centrifugal pump inlet 15 through the cooling chamber outlet 18. The liquid rapidly flows from the high pressure region into the cooling chamber 20 from one end and back to the negative pressure region from the other end of the cooling chamber 20.
The volume of the gas-liquid separation chamber 13 at the vacuum pump inlet 21 is large enough and the height of the gas-liquid separation chamber exceeds the top of the pump cavity of the centrifugal pump, so that the medium can be ensured to fill the pump cavity of the centrifugal pump, and the medium can not be sucked into the vacuum pump 7 when the centrifugal pump starts to operate normally.
The centrifugal pump outlet one-way valve 17 is closed when the vacuum pump 7 is vacuumized, so that a pump cavity of the centrifugal pump is communicated with an inlet pipeline to form a closed space, and is opened when the centrifugal pump 1 starts to normally operate after vacuumization is completed.
The mechanical seal waterless dry-rotation protection device 8 of the centrifugal pump 1 enables the centrifugal pump 1 to dry-rotate for a long time when no medium exists in a pump cavity of the centrifugal pump, and the mechanical seal cannot be damaged due to dry friction.
The centrifugal pump 1 may be various centrifugal pumps that transport liquid by generating centrifugal force using rotation of an impeller.
The working principle is as follows:
the centrifugal pump main shaft 2 starts to rotate along with the starting of a prime motor, at the moment, no liquid exists in a pump cavity of the centrifugal pump, a water flow switch 14 positioned at an inlet 15 of the centrifugal pump is in a closed state, a normally closed electromagnetic valve 10 is electrically conducted, an electromagnetic clutch 6 is electrically attracted, a vacuum pump 7 is connected with the centrifugal pump main shaft 2 through a belt 4 and a belt pulley 5 to drive and start to operate and exhaust, a one-way valve 17 at an outlet of the centrifugal pump is closed to enable the pump cavity of the centrifugal pump to be communicated with the inlet pipe to form a closed chamber, air in the pump cavity of the centrifugal pump is continuously pumped out of the pump cavity of the centrifugal pump by the vacuum pump 7, the pressure in the pump cavity of the centrifugal pump is gradually reduced to form vacuum, liquid at the source enters the pump cavity of the centrifugal pump from an inlet pipeline under the action of, the normally closed electromagnetic valve 10 is closed when power is off, the electromagnetic clutch 6 is disconnected when power is off, and the vacuum pump 7 stops working.
When a large amount of gas is contained around or in the liquid to be pumped, the gas can enter the pump cavity along with the medium, the liquid entering the water inlet pipe and the pump cavity is caused to return from the water inlet pipe due to insufficient negative pressure after the gas enters the pump cavity of the centrifugal pump, the water flow in the water inlet pipe of the centrifugal pump disappears at the moment, the water flow switch 14 positioned at the inlet of the centrifugal pump automatically restores to a closed state after the impact of the water flow is lost, the normally closed electromagnetic valve 10 is electrically conducted again, the electromagnetic clutch 6 is electrically attracted, the vacuum pump 7 starts to exhaust again until the water inlet pipe and the pump cavity of the centrifugal pump form vacuum, the liquid fills the pump cavity again, the vacuum pump 7 stops working, and. The process is repeated for a plurality of times according to the gas content around and in the pumped liquid until the whole work task is completed. The process is also called a water and air discharging process for solving the problem of 'snore' of the centrifugal pump.
Throughout the process, high pressure liquid at the centrifugal pump outlet 12 enters the cooling chamber 20 from the vacuum pump cooling chamber inlet 19 and flows back to the negative pressure region at the centrifugal pump inlet 15 from the cooling chamber outlet 18. The cooling water conducts heat generated by friction of sliding sheets and air compression in the vacuum pump out, so that the vacuum pump continuously operates in a low-temperature state.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in other embodiments without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a can handle self-priming centrifugal pump of gas-liquid mixture medium, including the vacuum auxiliary system of inhaling, its characterized in that vacuum pump (7) direct mount is on centrifugal pump (1) or support position, vacuum pump main shaft (3) are connected with centrifugal pump main shaft (2) transmission, vacuum pump import (21) are through pipeline one (9), gas-liquid separation room (13) intercommunication centrifugal pump chamber, install normally closed solenoid valve (10) on pipeline one (9), import (19) of cooling chamber (20) of vacuum pump (7) are located the high-pressure region of centrifugal pump export (12) by pipeline two (11) intercommunication, cooling chamber export (18) are located the negative pressure region of centrifugal pump import (15) by pipeline three (16) intercommunication.
2. The self-priming centrifugal pump capable of treating gas-liquid mixed media as claimed in claim 1, wherein the external cooling water of the vacuum pump (7) is derived from the media of the centrifugal pump.
3. The self-priming centrifugal pump capable of treating gas-liquid mixed medium as claimed in claim 1, wherein the volume of the gas-liquid separation chamber (13) at the inlet (21) of the vacuum pump is large enough and the height of the gas-liquid separation chamber exceeds the top of the pump cavity of the centrifugal pump to ensure that the medium fills the pump cavity of the centrifugal pump and the medium is not sucked into the vacuum pump (7) when the centrifugal pump starts to operate normally.
4. The self-priming centrifugal pump capable of treating gas-liquid mixed media as claimed in claim 1, wherein the centrifugal pump is provided with a one-way valve (17) at the outlet thereof, which is closed when the vacuum pump (7) is vacuumized to communicate the pump cavity of the centrifugal pump with the inlet pipeline to form a closed space, and which is opened when the centrifugal pump (1) starts to operate normally after the vacuum pumping is completed.
5. The self-priming centrifugal pump capable of treating gas-liquid mixed media as claimed in claim 1, characterized in that the centrifugal pump (1) is equipped with a mechanical seal water-free dry rotation protection device (8).
6. The self-priming centrifugal pump capable of treating gas-liquid mixed media as claimed in claim 1, wherein the inlet of the centrifugal pump is provided with a water flow switch (14).
7. The self-priming centrifugal pump capable of treating gas-liquid mixed medium as claimed in claim 1, wherein the centrifugal pump (1) is a centrifugal pump for transferring liquid by generating centrifugal force by rotation of an impeller.
8. The self-priming centrifugal pump capable of treating gas-liquid mixed medium is characterized in that the oil tank of the mechanical seal water-free dry rotation protection device (8) is arranged on the vacuum pump (7) or at a proper position.
9. The self-priming centrifugal pump capable of treating gas-liquid mixed media is characterized in that the vacuum pump main shaft (3) and the centrifugal pump main shaft (2) are in transmission connection through a belt (4), a belt pulley (5) and an electromagnetic clutch (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921179107.1U CN210623092U (en) | 2019-07-25 | 2019-07-25 | Self-priming centrifugal pump capable of treating gas-liquid mixed medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921179107.1U CN210623092U (en) | 2019-07-25 | 2019-07-25 | Self-priming centrifugal pump capable of treating gas-liquid mixed medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210623092U true CN210623092U (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921179107.1U Active CN210623092U (en) | 2019-07-25 | 2019-07-25 | Self-priming centrifugal pump capable of treating gas-liquid mixed medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210623092U (en) |
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2019
- 2019-07-25 CN CN201921179107.1U patent/CN210623092U/en active Active
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