CN111271270A - Special frequency conversion emergency control system for water supply equipment - Google Patents
Special frequency conversion emergency control system for water supply equipment Download PDFInfo
- Publication number
- CN111271270A CN111271270A CN202010069069.5A CN202010069069A CN111271270A CN 111271270 A CN111271270 A CN 111271270A CN 202010069069 A CN202010069069 A CN 202010069069A CN 111271270 A CN111271270 A CN 111271270A
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- Prior art keywords
- control
- water pump
- water
- frequency
- pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a special variable-frequency emergency control system for water supply equipment, and belongs to the field of variable-frequency control of secondary pressurized water supply equipment. The pressure sensor is arranged at the water outlet of the water pump and used for sensing the pressure value of the water outlet, an expert-level PID program is contained in the frequency converter, and the pressure sensor feeds back a signal to start and stop the PID program; the control mode of the water outlet pressure value of the water pump comprises automatic control and manual control; the automatic control is PLC control; the manual control is divided into emergency constant frequency control and emergency constant pressure control according to the water outlet pressure value of the water pump; the automatic control adjusts according to the size of the water pump delivery pressure value. The invention can select a water pump at will, which ensures the stability of the water pump in operation; and the back-and-forth wiring on the terminal is not needed, so that the maintenance cost is reduced, and the safety of workers is guaranteed.
Description
Technical Field
The invention relates to a special variable-frequency emergency control system for water supply equipment, and belongs to the field of variable-frequency control of secondary pressurized water supply equipment.
Background
When the secondary pressurization water supply equipment operates, the PLC program automatically drives the frequency converter to normally operate, once the PLC fails, the frequency converter cannot normally operate, the equipment cannot automatically operate at constant voltage and can only be switched to manual operation, manual operation requires artificial interference pressure, long-time constant voltage operation cannot be performed, and personnel fatigue and unstable operation of the equipment can be caused.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a special frequency conversion emergency control system of water supply equipment, it has solved in case PLC program became invalid and has caused the problem that whole equipment can not automatic operation.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the special variable-frequency emergency control system for the water supply equipment comprises a water pump, a pressure sensor and a frequency converter, wherein the pressure sensor is arranged at a water outlet of the water pump and used for sensing a pressure value of the water outlet, an expert PID program is contained in the frequency converter, and a signal fed back by the pressure sensor is used for starting and stopping the PID program;
the control mode of the water outlet pressure value of the water pump comprises automatic control and manual control;
the automatic control is PLC control;
the manual control is divided into emergency constant frequency control and emergency constant pressure control according to the water outlet pressure value of the water pump;
the automatic control is adjusted according to the water outlet pressure value of the water pump, the water pump is started under the emergency constant pressure control under the action of manual adjustment, expert-level PID program parameters in the frequency converter are adjusted, the pressure sensor feeds back the water outlet pressure value of the water pump to realize that the expert-level PID program carries out closed-loop control, and the closed-loop control automatically reduces the speed according to the rise of the water pump pressure or automatically increases the speed according to the fall of the water pump pressure to adjust the pressure so as to realize constant-pressure water supply;
the emergency constant-frequency control water pump is started, parameters of the frequency converter are adjusted, and accordingly the water outlet pressure value of the water pump is adjusted, and constant-frequency water supply is achieved.
The water supply system further comprises a water supply network, the number of the water pumps is multiple, and the water pumps are arranged on the water supply network in a parallel connection mode.
The invention has the beneficial effects that: the invention can select a water pump at will, which ensures the stability of the water pump in operation; and the back-and-forth wiring on the terminal is not needed, so that the maintenance cost is reduced, and the safety of workers is guaranteed.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.
As shown in fig. 1, the frequency conversion emergency control system special for the water supply equipment comprises a water pump, a pressure sensor and a frequency converter, wherein the pressure sensor is arranged at a water outlet of the water pump and used for sensing a pressure value of the water outlet, an expert-level PID program is contained in the frequency converter, and a feedback signal of the pressure sensor is used for opening and closing the PID program;
the control mode of the water outlet pressure value of the water pump comprises automatic control and manual control;
the automatic control is PLC control;
the manual control is divided into emergency constant frequency control and emergency constant pressure control according to the water outlet pressure value of the water pump;
the automatic control adjusts according to the size of the water outlet pressure value of the water pump, the water pump is started under the emergency constant pressure control under the action of manual adjustment, expert-level PID program parameters in the frequency converter are adjusted, the pressure sensor feeds back the water outlet pressure value of the water pump to realize that the expert-level PID program carries out closed-loop control, and the closed-loop control adjusts the pressure according to the automatic speed reduction of the pressure rise of the water pump or the automatic speed increase of the pressure drop of the water pump, so that the constant-pressure water supply is realized;
the emergency constant-frequency control water pump is started, parameters of the frequency converter are adjusted, the water outlet pressure value of the water pump is adjusted, and constant-frequency water supply is achieved.
The water supply system also comprises a water supply network, the number of the water pumps is multiple, and the water pumps are arranged on the water supply network in a parallel connection mode.
The working principle is as follows:
when the water pump fails and cannot automatically operate, the automatic control, namely PLC control, is switched to a control mode combining manual control and automatic control, namely constant-frequency water supply, then one water pump can be selected at will, a start button is pressed, at the moment, an expert-level PID program in the frequency converter feeds back a pressure value through a pressure sensor at a water outlet to perform closed-loop control, the automatic lifting frequency drives the water pump to operate at high speed or low speed until the pressure value at the water outlet reaches a set value and is constant, then the pressure is regulated by the automatic speed reduction or speed increase water pump according to the pressure rise or fall smoothly, the control mode of automatically operating and selecting any water pump is realized, if the other water pump needs to be replaced, only the stop button is pressed by the currently operating water pump, and then the start button of the water pump needing to be replaced is pressed, the device has an automatic PID operation.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. Special frequency conversion emergency control system of water supply equipment, its characterized in that: the pressure sensor is arranged at the water outlet of the water pump and used for sensing the pressure value of the water outlet, an expert PID program is contained in the frequency converter, and a signal is fed back by the pressure sensor to start and stop the PID program;
the control mode of the water outlet pressure value of the water pump comprises automatic control and manual control;
the automatic control is PLC control;
the manual control is divided into emergency constant frequency control and emergency constant pressure control according to the water outlet pressure value of the water pump;
the automatic control is adjusted according to the water outlet pressure value of the water pump, the water pump is started under the emergency constant pressure control under the action of manual adjustment, expert-level PID program parameters in the frequency converter are adjusted, the pressure sensor feeds back the water outlet pressure value of the water pump to realize that the expert-level PID program carries out closed-loop control, and the closed-loop control automatically reduces the speed according to the rise of the water pump pressure or automatically increases the speed according to the fall of the water pump pressure to adjust the pressure so as to realize constant-pressure water supply;
the emergency constant-frequency control water pump is started, parameters of the frequency converter are adjusted, and accordingly the water outlet pressure value of the water pump is adjusted, and constant-frequency water supply is achieved.
2. The variable-frequency emergency control system special for water supply equipment according to claim 1, characterized in that: the water supply system is characterized by further comprising a water supply pipe network, wherein the number of the water pumps is multiple, and the water pumps are arranged on the water supply pipe network in a parallel connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010069069.5A CN111271270A (en) | 2020-01-21 | 2020-01-21 | Special frequency conversion emergency control system for water supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010069069.5A CN111271270A (en) | 2020-01-21 | 2020-01-21 | Special frequency conversion emergency control system for water supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271270A true CN111271270A (en) | 2020-06-12 |
Family
ID=70997633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010069069.5A Pending CN111271270A (en) | 2020-01-21 | 2020-01-21 | Special frequency conversion emergency control system for water supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111271270A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033714A (en) * | 2021-11-17 | 2022-02-11 | 中国核动力研究设计院 | Pump speed adjusting control method and system for main feed pump of nuclear power plant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008073436A2 (en) * | 2006-12-11 | 2008-06-19 | Pentair Water Pool And Spa, Inc. | Pumping system with two way communication |
| CN205776544U (en) * | 2016-05-31 | 2016-12-07 | 广州市明日自动化科技有限公司 | A kind of frequency conversion motor constant pressure water supply control system |
| CN205776508U (en) * | 2016-07-06 | 2016-12-07 | 乐山盛和稀土股份有限公司 | A kind of automatic Constant-pressure Supplying Water Control System |
| CN207331864U (en) * | 2017-10-09 | 2018-05-08 | 李天阳 | A kind of novel constant-pressure water system |
| CN110161958A (en) * | 2019-06-06 | 2019-08-23 | 山东华立供水设备有限公司 | A kind of single frequency conversion automatic control system and its implementation of no-negative-pressure water supply equipment |
-
2020
- 2020-01-21 CN CN202010069069.5A patent/CN111271270A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008073436A2 (en) * | 2006-12-11 | 2008-06-19 | Pentair Water Pool And Spa, Inc. | Pumping system with two way communication |
| CN205776544U (en) * | 2016-05-31 | 2016-12-07 | 广州市明日自动化科技有限公司 | A kind of frequency conversion motor constant pressure water supply control system |
| CN205776508U (en) * | 2016-07-06 | 2016-12-07 | 乐山盛和稀土股份有限公司 | A kind of automatic Constant-pressure Supplying Water Control System |
| CN207331864U (en) * | 2017-10-09 | 2018-05-08 | 李天阳 | A kind of novel constant-pressure water system |
| CN110161958A (en) * | 2019-06-06 | 2019-08-23 | 山东华立供水设备有限公司 | A kind of single frequency conversion automatic control system and its implementation of no-negative-pressure water supply equipment |
Non-Patent Citations (1)
| Title |
|---|
| 段樊斌等: ""某铀矿工业水井无线远程控制系统"", 《铀矿冶》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033714A (en) * | 2021-11-17 | 2022-02-11 | 中国核动力研究设计院 | Pump speed adjusting control method and system for main feed pump of nuclear power plant |
| CN114033714B (en) * | 2021-11-17 | 2023-08-25 | 中国核动力研究设计院 | Pump speed adjusting and controlling method and system for main water supply pump of nuclear power plant |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200612 |