CN107842510B - Centrifugal pump control system and control method - Google Patents
Centrifugal pump control system and control method Download PDFInfo
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- CN107842510B CN107842510B CN201711061988.2A CN201711061988A CN107842510B CN 107842510 B CN107842510 B CN 107842510B CN 201711061988 A CN201711061988 A CN 201711061988A CN 107842510 B CN107842510 B CN 107842510B
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- liquid
- centrifugal pump
- switch
- valve
- pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0072—Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
- F04D15/0083—Protection against sudden pressure change, e.g. check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
- F04D15/0263—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being temperature, ingress of humidity or leakage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal pump control system, which comprises a centrifugal pump, an exhaust system and a liquid conveying system which are connected with the centrifugal pump, and a liquid level sensor for detecting liquid level; the exhaust system includes: the air vent pipeline is connected with the centrifugal pump, a switch is arranged on the air vent pipeline, and the controller controls the switch to be turned on or off; the liquid delivery system includes: the liquid conveying pipeline, and the feed liquor valve and the governing valve of setting on liquid conveying pipeline, the controller control feed liquor valve with the opening or closing of governing valve. The centrifugal pump can realize safe and automatic operation on the premise of unmanned operation, not only can realize the management of the centrifugal pump, but also effectively reduces the cost. The invention also discloses a control method of the centrifugal pump.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump control system and a centrifugal pump control method.
Background
The centrifugal pump is mainly used for conveying water, oil, sewage and corrosive, toxic and other liquids, the working environment in which the centrifugal pump is located is generally in a severe or remote place, and when the multistage centrifugal pump needs to be used, the operation is carried out by manually going to the place where the centrifugal pump is located, so that not only is the inconvenience of much management caused, but also the labor cost is high.
Therefore, how to provide a centrifugal pump control system capable of automatic control, which not only facilitates the management of the centrifugal pump, but also effectively reduces the cost is a technical problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of this, the present invention provides a centrifugal pump control system capable of automatic control, which not only facilitates the management of the centrifugal pump, but also effectively reduces the cost.
The invention also provides a centrifugal pump control method.
In order to achieve the purpose, the invention provides the following technical scheme:
a centrifugal pump control system comprises a centrifugal pump, and an exhaust system and a liquid conveying system which are connected with the centrifugal pump,
the liquid level sensor is used for detecting the liquid level;
the exhaust system includes: the air vent pipeline is connected with the centrifugal pump, a switch is arranged on the air vent pipeline, and the controller controls the switch to be turned on or off;
the liquid delivery system includes: the liquid conveying device comprises a liquid conveying pipeline, a liquid inlet valve and an adjusting valve, wherein the liquid inlet valve and the adjusting valve are arranged on the liquid conveying pipeline;
when the liquid level detected by the liquid level sensor reaches a preset opening liquid level, the controller controls the switch on the ventilation pipeline to be opened and controls the liquid inlet valve on the liquid conveying pipeline to be opened, and after a preset time, the controller controls the switch to be closed, the centrifugal pump to operate and the regulating valve to be opened;
when the liquid level detected by the liquid level sensor is lower than a preset closing liquid level, the controller controls the regulating valve to be closed, the centrifugal pump stops running, and the liquid inlet valve is closed.
Preferably, the switch is a solenoid valve.
Preferably, the centrifugal pump includes a first centrifugal pump and a second centrifugal pump, and the exhaust system includes a first exhaust system and a second exhaust system, wherein,
the first exhaust system includes: the first ventilation pipeline is connected with the first centrifugal pump, a first switch is arranged on the first ventilation pipeline, and the controller controls the first switch to be turned on or turned off;
the second exhaust system includes: and the second ventilation pipeline is connected with the second centrifugal pump, a second switch is arranged on the second ventilation pipeline, and the controller controls the second switch to be turned on or turned off.
Preferably, the liquid delivery system comprises a first liquid delivery system and a second liquid delivery system, wherein,
the first liquid conveying system comprises a first liquid conveying pipeline, a first liquid inlet valve and a first regulating valve are arranged on the first liquid conveying pipeline, and the controller controls the first liquid inlet valve and the first regulating valve to be opened or closed;
the second liquid conveying system comprises a second liquid conveying pipeline, a second liquid inlet valve and a second regulating valve are arranged on the second liquid conveying pipeline, and the controller controls the second liquid inlet valve and the second regulating valve to be opened or closed;
preferably, the device further comprises an alarm device arranged on the exhaust system and the liquid delivery system.
Preferably, the first liquid conveying pipeline and the second liquid conveying pipeline are respectively provided with a check valve for preventing the liquid from flowing backwards;
preferably, the first liquid delivery pipeline and the second liquid delivery pipeline are respectively provided with an electromagnetic flowmeter for detecting the liquid flow.
A centrifugal pump control method comprises the following steps when liquid level reaches a preset opening value:
step 1: controlling the opening of a ventilation pipeline connected with a centrifugal pump and controlling the opening of a liquid conveying pipeline connected with the centrifugal pump;
step 2: after a predetermined time, closing the vent line;
and when the liquid level reaches a preset closing value, controlling the liquid conveying pipeline to be closed.
Preferably, the predetermined time is 10s to 20 s.
According to the technical scheme, the centrifugal pump control system disclosed by the embodiment of the invention comprises a centrifugal pump, an exhaust system and a liquid conveying system which are connected with the centrifugal pump, and a liquid level sensor for detecting the liquid level; the exhaust system includes: the air vent pipeline is connected with the centrifugal pump, a switch is arranged on the air vent pipeline, and the controller controls the switch to be turned on or off; the liquid delivery system includes: the liquid conveying pipeline, and the feed liquor valve and the governing valve of setting on liquid conveying pipeline, the controller control feed liquor valve with the opening or closing of governing valve. The liquid level sensor detects the liquid level of the liquid tank, when the liquid level sensor detects that the liquid level reaches a preset opening liquid level, the controller controls the switch on the ventilation pipeline to be opened and controls the liquid inlet valve on the liquid conveying pipeline to be opened, after preset time, the controller controls the switch to be closed, the centrifugal pump starts to operate and the regulating valve is opened, and liquid is conveyed; when the liquid level sensor detects that the liquid level is lower than the preset closing liquid level, the controller controls the regulating valve to be closed, the centrifugal pump stops running, and the liquid inlet valve is closed. The centrifugal pump can realize safe and automatic operation on the premise of unmanned operation, not only can realize the management of the centrifugal pump, but also effectively reduces the cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of a centrifugal pump control system disclosed in the embodiment of the present invention.
Wherein, the names of each part are as follows:
1-a liquid tank, 11-a liquid level sensor, 2-a first centrifugal pump, 3-a second centrifugal pump, 4-a first vent pipeline, 41-a first switch, 5-a second vent pipeline, 51-a second switch, 6-a first liquid conveying pipeline, 61-a first liquid inlet valve, 62-a first regulating valve, 7-a second liquid conveying pipeline, 71-a second liquid inlet valve, 72-a second regulating valve, 8-a thermal resistor, 9-a check valve and 10-an electromagnetic flowmeter.
Detailed Description
In view of this, the core of the present invention is to provide a centrifugal pump control system capable of automatic control, which not only facilitates the management of the centrifugal pump, but also effectively reduces the cost.
Another core of the present invention is to provide a method for controlling a centrifugal pump.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the centrifugal pump control system disclosed in the embodiment of the present invention includes a centrifugal pump, and an exhaust system and a liquid delivery system connected to the centrifugal pump, and further includes a liquid level sensor 11 for detecting a liquid level; the exhaust system includes: the air vent pipeline is connected with the centrifugal pump, a switch is arranged on the air vent pipeline, and the controller controls the switch to be turned on or off; the liquid delivery system includes: the liquid conveying pipeline, and the feed liquor valve and the governing valve of setting on liquid conveying pipeline, the controller control feed liquor valve with the opening or closing of governing valve.
The liquid level sensor 11 detects the liquid level of the liquid tank 1, when the liquid level sensor 11 detects that the liquid level reaches a preset opening liquid level, the controller controls the switch on the ventilation pipeline to be opened and controls the liquid inlet valve on the liquid conveying pipeline to be opened, after preset time, the controller controls the switch to be closed, the centrifugal pump starts to operate and the regulating valve to be opened, and liquid is conveyed; when the liquid level sensor 11 detects that the liquid level is lower than the preset closing liquid level, the controller controls the regulating valve to be closed, the centrifugal pump stops running, and the liquid inlet valve is closed. The centrifugal pump can realize safe and automatic operation on the premise of unmanned operation, not only can realize the management of the centrifugal pump, but also effectively reduces the cost.
Further, the difference value between the preset opening liquid level and the preset closing liquid level is preferably 0.1-0.6 m from the highest liquid level to the liquid outlet.
It should be noted that the switch may be a float-type liquid level switch, or may be an electromagnetic valve, and since the electromagnetic valve has a simple structure and is convenient to arrange, the switch is preferably set as the electromagnetic valve.
In order to further optimize the scheme, the embodiment of the invention is further improved on the basis of the above embodiment, the centrifugal pump disclosed by the embodiment comprises a first centrifugal pump 2 and a second centrifugal pump 3, and the exhaust system comprises a first exhaust system and a second exhaust system, wherein the first exhaust system comprises: the first ventilation pipeline 4 is connected with the first centrifugal pump 2, a first switch 41 is arranged on the first ventilation pipeline 4, and the controller controls the first switch 41 to be opened or closed; the second exhaust system includes: and the second ventilation pipeline 5 is connected with the second centrifugal pump 3, a second switch 51 is arranged on the second ventilation pipeline 5, and the controller controls the second switch 51 to be turned on or off.
It should be noted that the first exhaust system and the second exhaust system may operate simultaneously; one of the main exhaust systems can be used as a main exhaust system, the other one can be used as a standby exhaust system, and when the main exhaust system fails, the standby exhaust system can be started in time.
As the preferred scheme, the exhaust system is provided with the alarm device, and when any one exhaust system breaks down, the alarm device can play a role in alarming in time so as to ensure that a worker can repair the exhaust system in time.
Correspondingly, the liquid conveying system disclosed in the embodiment of the present invention preferably includes a first liquid conveying system and a second liquid conveying system, wherein the first liquid conveying system includes a first liquid conveying pipeline 6, a first liquid inlet valve 61 and a first regulating valve 62 are disposed on the first liquid conveying pipeline 6, and the controller controls the first liquid inlet valve 61 and the first regulating valve 62 to open or close;
the second liquid conveying system comprises a second liquid conveying pipeline 7, a second liquid inlet valve 71 and a second regulating valve 72 are arranged on the second liquid conveying pipeline 7, and the controller controls the second liquid inlet valve 71 and the second regulating valve 72 to be opened or closed.
It should be noted that the first liquid conveying pipeline 6 and the second liquid conveying pipeline 7 can operate simultaneously; of course, one of the liquid delivery systems may be used as the main liquid delivery system and the other liquid delivery system as the backup liquid delivery system, and the backup liquid delivery system may be activated when the main liquid delivery line fails.
When any one liquid conveying system is in failure, the alarm device arranged on the liquid conveying system can play a role of alarming so as to prompt workers to repair in time.
It should be noted that the first centrifugal pump 2 and the second centrifugal pump 3 are respectively provided with the thermal resistor 8, the thermal resistor 8 can automatically monitor the temperature of the centrifugal pumps, and when the centrifugal pumps are overloaded and have high temperature, automatic shutdown can be realized to ensure that the potential safety hazard of the centrifugal pumps can be found in time, so that the safe and reliable operation of the equipment can be protected.
Further, in order to prevent the reverse flow of the liquid, check valves 9 are provided in the first liquid feed line 6 and the second liquid feed line 7.
In addition, an electromagnetic flow meter 10 for detecting the flow rate of the liquid is provided in the first liquid transport line 6 and the second liquid transport line 7.
The embodiment of the invention also discloses a centrifugal pump control method, when the liquid level reaches a preset opening value, the method comprises the following steps: step 1: controlling the opening of a ventilation pipeline connected with the centrifugal pump; step 2: after the preset time, closing the ventilation pipeline and controlling the liquid conveying pipeline connected with the centrifugal pump to be opened; and when the liquid level reaches a preset closing value, controlling the liquid conveying pipeline to be closed.
The liquid level sensor 11 detects the liquid level of the liquid tank 1, when the liquid level sensor 11 detects that the liquid level reaches a preset opening liquid level, the controller controls the ventilation pipeline connected with the centrifugal pump to be opened, and controls the liquid conveying pipeline connected with the centrifugal pump to be opened, after a preset time, the controller controls the ventilation pipeline to be closed, the centrifugal pump starts to operate, and liquid is conveyed; when the liquid level sensor 11 detects that the liquid level is lower than the preset closing liquid level, the centrifugal pump stops running, and the controller controls the liquid conveying pipeline to be closed. The centrifugal pump can realize safe and automatic operation on the premise of unmanned operation, not only can realize the management of the centrifugal pump, but also effectively reduces the cost.
The predetermined time is 10s to 20 s.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A centrifugal pump control system comprising a centrifugal pump, and an exhaust system and a liquid delivery system connected to the centrifugal pump,
the liquid level sensor (11) is used for detecting the liquid level;
the exhaust system includes: the air vent pipeline is connected with the centrifugal pump, a switch is arranged on the air vent pipeline, and the controller controls the switch to be turned on or off;
the liquid delivery system includes: the liquid conveying device comprises a liquid conveying pipeline, a liquid inlet valve and an adjusting valve, wherein the liquid inlet valve and the adjusting valve are arranged on the liquid conveying pipeline;
when the liquid level detected by the liquid level sensor (11) reaches a preset opening liquid level, the controller controls the switch on the ventilation pipeline to be opened and controls the liquid inlet valve on the liquid conveying pipeline to be opened, and after a preset time, the controller controls the switch to be closed, the centrifugal pump to run and the regulating valve to be opened;
when the liquid level detected by the liquid level sensor (11) is lower than a preset closing liquid level, the regulating valve is closed, the centrifugal pump stops running, and the controller controls the liquid inlet valve to be closed;
the centrifugal pump comprising a first centrifugal pump (2) and a second centrifugal pump (3), the exhaust system comprising a first exhaust system and a second exhaust system, the vent line comprising a first vent line (4) and a second vent line (5), the switch comprising a first switch (41) and a second switch (51), wherein,
the first exhaust system includes: the first ventilation pipeline (4) is connected with the first centrifugal pump (2), a first switch (41) is arranged on the first ventilation pipeline (4), and the controller controls the first switch (41) to be turned on or turned off;
the second exhaust system includes: and the second ventilation pipeline (5) is connected with the second centrifugal pump (3), a second switch (51) is arranged on the second ventilation pipeline (5), and the controller controls the second switch (51) to be turned on or turned off.
2. The centrifugal pump control system of claim 1, wherein the switch is a solenoid valve.
3. A centrifugal pump control system according to claim 1, wherein the liquid delivery system comprises a first liquid delivery system and a second liquid delivery system, the intake valve comprising a first intake valve (61) and a second intake valve (71), the regulating valve comprising a first regulating valve (62) and a second regulating valve (72), wherein,
the first liquid conveying system comprises a first liquid conveying pipeline (6), a first liquid inlet valve (61) and a first regulating valve (62) are arranged on the first liquid conveying pipeline (6), and the controller controls the first liquid inlet valve (61) and the first regulating valve (62) to be opened or closed;
the second liquid conveying system comprises a second liquid conveying pipeline (7), a second liquid inlet valve (71) and a second regulating valve (72) are arranged on the second liquid conveying pipeline (7), and the controller controls the second liquid inlet valve (71) and the second regulating valve (72) to be opened or closed.
4. The centrifugal pump control system of claim 1, further comprising an alarm device disposed on the exhaust system and the liquid delivery system.
5. A centrifugal pump control system according to claim 3, characterized in that the first liquid delivery line (6) and the second liquid delivery line (7) are further provided with check valves (9) for preventing reverse flow of liquid, respectively.
6. A centrifugal pump control system according to claim 3, characterized in that the first liquid delivery line (6) and the second liquid delivery line (7) are each further provided with an electromagnetic flow meter (10) for detecting the liquid flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711061988.2A CN107842510B (en) | 2017-11-02 | 2017-11-02 | Centrifugal pump control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711061988.2A CN107842510B (en) | 2017-11-02 | 2017-11-02 | Centrifugal pump control system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107842510A CN107842510A (en) | 2018-03-27 |
| CN107842510B true CN107842510B (en) | 2020-02-18 |
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| CN201711061988.2A Active CN107842510B (en) | 2017-11-02 | 2017-11-02 | Centrifugal pump control system and control method |
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| CN113187741B (en) * | 2021-04-29 | 2022-12-02 | 长鑫存储技术有限公司 | Liquid back suction system and back suction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201236822Y (en) * | 2008-07-22 | 2009-05-13 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Automatic pump controller |
| CN201288937Y (en) * | 2008-04-24 | 2009-08-12 | 江继辉 | Self-control type centrifugal pump vacuum priming device |
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2017
- 2017-11-02 CN CN201711061988.2A patent/CN107842510B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201288937Y (en) * | 2008-04-24 | 2009-08-12 | 江继辉 | Self-control type centrifugal pump vacuum priming device |
| CN201236822Y (en) * | 2008-07-22 | 2009-05-13 | 山西潞安环保能源开发股份有限公司王庄煤矿 | Automatic pump controller |
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| CN107842510A (en) | 2018-03-27 |
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