CN202166907U - Automatic water level, flow adjusting device for plumber depression tank test - Google Patents
Automatic water level, flow adjusting device for plumber depression tank test Download PDFInfo
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- CN202166907U CN202166907U CN201120271686XU CN201120271686U CN202166907U CN 202166907 U CN202166907 U CN 202166907U CN 201120271686X U CN201120271686X U CN 201120271686XU CN 201120271686 U CN201120271686 U CN 201120271686U CN 202166907 U CN202166907 U CN 202166907U
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Abstract
The utility model discloses a automatic water level, flow adjusting device for plumber depression tank test and a control method thereof, wherein the device comprises an upstream water tank, a downstream water tank, and a pipeline arranged between the upstream water tank and the downstream water tank and provided with water pumps; the pipeline is provided with an electromagnetic flowmeter and a pressure sensor which are connected with a PLC (programmable logical controller) control system, and frequency converters connected with the PLC control systems are installed on the water pump of the pipeline; isolation valves are arranged at the connection parts among in/out ports of the water pump and the pipeline; and the upstream and downstream water tanks are all provided with absolute pressure type water level gauges and pressure sensors and are connected with the PLC control system. According to the device, the testing water level of a depression tank, the stability and the precision of the control of test flow can be greatly improved, the dynamic automatic adjustment can be realized for a long time, the work intensity of workers can be lightened, and the energy saving and the efficiency increasing can be realized through the frequency conversion control on the water pumps.
Description
Technical field
The utility model relates to a kind of water conservancy project decompression cabinet test water level, automatic flow rate adjusting device, and is a kind of specifically for realizing that water conservancy project decompression cabinet experimental enviroment requires the self-regulating device of taking of water level, flow.
Background technology
The requirement of testing and studying along with the water conservancy project decompression cabinet constantly promotes; Requirement to test water level, flow in the water conservancy project decompression cabinet process of the test improves constantly thereupon; All be to rely on artificial start and stop water pump, regulate modes such as manually-operated gate and reach testing requirements in the past, water level, flow control accuracy are low, poor stability; Participate in the experiment observation personnel many, conventional efficient is low.The automatic adjusting that how to realize testing in the process of the test water level, flow all is the focus of research and design all the time.
Through long-term scientific research and exploration practice; The convenient remarkable progress that obtained of the data acquisition of scientific research personnel in the hydraulic test process; Simultaneously; Along with the development of control technology, water pump, variable valve, flowmeter etc. have also adopted automatic control technology in the process of the test of water conservancy project decompression cabinet, have introduced computing machine and PLC control system.But how to realize the water level in the process of the test, the automatic adjusting of flow, be the problem that design and scientific research and testing personnel pay special attention to always.
The utility model content
The utility model technical matters to be solved is: have shortcoming to above prior art, propose a kind of water conservancy project decompression cabinet test water level, automatic flow rate adjusting device, can realize the water level in the decompression cabinet process of the test, the dynamic auto adjusting of flow.
The technical scheme that the utility model solves above technical matters is: the utility model provides a kind of water conservancy project decompression cabinet test water level, automatic flow rate adjusting device; Comprise upper reaches water tank, downstream water tank, be arranged on the pipeline between said upper reaches water tank and the downstream water tank, said pipeline is provided with water pump; Said pipeline is provided with electromagnetic flowmeter and links to each other with the PLC control system with pressure transducer, on the water pump on the said pipeline frequency converter is installed, and said frequency converter is connected with said PLC control system; The import and export of said water pump and said pipeline junction are provided with isolation valve; Said upper reaches water tank and downstream water tank are all installed absolute pressure formula water level gauge, pressure transducer, and insert said PLC control system.
The technical scheme that the utility model further limits is: water conservancy project decompression cabinet test water level, the automatic flow rate adjusting device stated; It is characterized in that: cutting apart in the water tank of said upstream and downstream has a plurality of little tank unit; Adjacent said little tank unit, is then opened the motorized adjustment by-pass valve through the control of PLC system and is utilized gravity to discharge water when the water level in the little tank unit is higher through the motorized adjustment by-pass valve and the water pump of series connection; When water level is low, opens water pump little tank unit is supplied water.
Aforesaid water conservancy project decompression cabinet test water level, automatic flow rate adjusting device, said frequency converter and said PLC control system adopt fieldbus mode control linkage, have avoided the interference of power-equipment to signal.
Further, the control method of aforesaid water conservancy project decompression cabinet test water level, automatic flow rate adjusting device may further comprise the steps:
The first step: set upper reaches test water level and test flow through said PLC control system, the system start-up water pump is filled to designated water level by downstream water tank upstream so water tank;
Second step: regulate control pump motor frequency and by-pass valve aperture, thereby realize the dynamically constant of test water level and flow;
The 3rd step: gather the instantaneous value of upstream and downstream cistern water level, decompression cabinet flowmeter, calculate the difference of desired value and actual value, through the PID closed-loop control, completion is given to the bus control signal of variable frequency pump and bypass regulator valve analog quantity control signal.
The aforementioned water conservancy project decompression cabinet test water level of stating, the control method of automatic flow rate adjusting device, said bypass regulator valve analog quantity control signal amount is 0～10V, realizes the stable control function of test water level and flow.
In water conservancy project decompression cabinet pilot system, the control of constant water level and flow is a difficult problem always, water level and flow control stable with accurately directly have influence on model experiment results, thereby possibly have influence on the work safety of actual original shape.The utility model need not increase a lot of equipment, clear principle, and simple structure possesses good application prospects.
The utility model has the advantages that: (1) can be improved the stability and the control accuracy of decompression cabinet test water level, test flow control greatly; (2) can long-time dynamic auto adjusting, alleviate the testing crew working strength; (3) can realize energy efficiency through VFC to water pump.
Description of drawings
Fig. 1 is for adopting variable frequency pump control aquifer yield.
Fig. 2 selects the bypass electric control valve for use for the upstream and downstream water tank.
Embodiment
Embodiment 1
Present embodiment is a kind of test of water conservancy project decompression cabinet water level, automatic flow rate adjusting device and control method thereof; Structure is as shown in Figure 1; Comprise upper reaches water tank 1, downstream water tank 2, be arranged on the pipeline 3 between said upper reaches water tank and the downstream water tank, pipeline is provided with water pump 4; Said pipeline is provided with electromagnetic flowmeter 5 and links to each other with PLC control system 7 with pressure transducer 6, on the water pump 7 on the said pipeline frequency converter 9 is installed, and said frequency converter 9 adopts fieldbus mode control linkage with said PLC control system 7; The import and export of said water pump and said pipeline junction are provided with isolation valve 8; Said upper reaches water tank 1 is all installed absolute pressure formula water level gauge, pressure transducer with downstream water tank 2, and inserts said PLC control system 7.In the water tank of upstream and downstream, cutting apart has a plurality of little tank unit, and adjacent said little tank unit is connected with adjusting water pump 11 through the motorized adjustment by-pass valve 10 of series connection.
The utility model control method, may further comprise the steps:
The first step: set upper reaches test water level and test flow through said PLC control system, the system start-up water pump is filled to designated water level by downstream water tank upstream so water tank;
Second step: regulate control pump motor frequency and by-pass valve aperture, thereby realize the dynamically constant of test water level and flow;
The 3rd step: the instantaneous value of gathering upstream and downstream cistern water level, decompression cabinet flowmeter; Calculate the difference of desired value and actual value; Through the PID closed-loop control; Completion is given to the bus control signal of variable frequency pump and bypass regulator valve analog quantity control signal, and bypass regulator valve analog quantity control signal amount is 0～10V.
The utility model is through computer settings upper reaches test water level and test flow; The system start-up variable frequency pump, the upstream so water tank is filled to designated water level, through the PID computing; Control pump motor frequency and by-pass valve aperture simultaneously, thereby realize the dynamically constant of test water level and flow.
The control of pump variable frequency device adopts the fieldbus mode to control through PLC, avoids the interference of power-equipment to signal; PLC gathers the instantaneous value of upstream and downstream cistern water level, decompression cabinet flowmeter simultaneously; Calculate the difference of desired value and actual value; Through the PID closed-loop control; Completion is given to the bus control signal of variable frequency pump, and 0～10V analog quantity control signal of accomplishing bypass regulator valve is given, realizes the stable control function of test water level and flow.
In the present embodiment, adopt water level, the automatic regulatory function of flow, install frequency converter additional at the water pump end; The upstream and downstream water tank installs level sensor additional, and bypass line installs electronic bypass regulator valve additional, realizes the automatic adjusting of test water level, flow; Solved the key problem of water conservancy project decompression cabinet test water level, flow control; Principle is simple, and it is convenient to implement, and effect is remarkable.
The utility model can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of the utility model requirement protection.
Claims (3)
1. a water conservancy project decompression cabinet is tested water level, automatic flow rate adjusting device, comprises upper reaches water tank, downstream water tank, is arranged on the pipeline between said upper reaches water tank and the downstream water tank, and said pipeline is provided with water pump; It is characterized in that: said pipeline is provided with electromagnetic flowmeter and links to each other with the PLC control system with pressure transducer, on the water pump on the said pipeline frequency converter is installed, and said frequency converter is connected with said PLC control system; The import and export of said water pump and said pipeline junction are provided with isolation valve; Said upper reaches water tank and downstream water tank are all installed absolute pressure formula water level gauge, pressure transducer, and insert said PLC control system.
2. water conservancy project decompression cabinet test water level according to claim 1, automatic flow rate adjusting device; It is characterized in that: cutting apart in the water tank of said upstream and downstream has a plurality of little tank unit, and adjacent said little tank unit is connected with water pump through the motorized adjustment by-pass valve of series connection.
3. water conservancy project decompression cabinet test water level according to claim 1, automatic flow rate adjusting device, it is characterized in that: said frequency converter and said PLC control system adopt fieldbus mode control linkage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120271686XU CN202166907U (en) | 2011-07-28 | 2011-07-28 | Automatic water level, flow adjusting device for plumber depression tank test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120271686XU CN202166907U (en) | 2011-07-28 | 2011-07-28 | Automatic water level, flow adjusting device for plumber depression tank test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202166907U true CN202166907U (en) | 2012-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120271686XU Withdrawn - After Issue CN202166907U (en) | 2011-07-28 | 2011-07-28 | Automatic water level, flow adjusting device for plumber depression tank test |
Country Status (1)
| Country | Link |
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| CN (1) | CN202166907U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354236A (en) * | 2011-07-28 | 2012-02-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Automatic adjusting device of test water level and flow of hydraulic depression tank and control method thereof |
| CN110703818A (en) * | 2019-10-28 | 2020-01-17 | 中国水利水电科学研究院 | Unsteady flow control system of hydropower station downstream model test |
| US11860009B2 (en) | 2019-06-07 | 2024-01-02 | The Ford Meter Box Company, Inc. | Automated measuring system for meter test bench |
-
2011
- 2011-07-28 CN CN201120271686XU patent/CN202166907U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354236A (en) * | 2011-07-28 | 2012-02-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Automatic adjusting device of test water level and flow of hydraulic depression tank and control method thereof |
| CN102354236B (en) * | 2011-07-28 | 2013-07-17 | 水利部交通运输部国家能源局南京水利科学研究院 | Automatic adjusting device of test water level and flow of hydraulic depression tank and control method thereof |
| US11860009B2 (en) | 2019-06-07 | 2024-01-02 | The Ford Meter Box Company, Inc. | Automated measuring system for meter test bench |
| CN110703818A (en) * | 2019-10-28 | 2020-01-17 | 中国水利水电科学研究院 | Unsteady flow control system of hydropower station downstream model test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Yaan Inventor after: Ling Guozeng Inventor after: Yan Xiujun Inventor after: Feng Zhonghua Inventor after: Ruan Shiping Inventor after: Wang Xiaodong Inventor after: Yang Lin Inventor after: Hu Hao Inventor after: Fang Long Inventor before: Hu Yaan Inventor before: Ling Guozeng Inventor before: Yan Xiujun Inventor before: Feng Zhonghua Inventor before: Ruan Shiping Inventor before: Wang Xiaodong Inventor before: Yang Lin Inventor before: Ruan Shiping Inventor before: Fang Long |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HU YAAN LING GUOZENG YAN XIUJUN FENG ZHONGHUA RUAN SHIPING WANG XIAODONG YANG LIN RUAN SHIPING FANG LONG TO: HU YAAN LING GUOZENG YAN XIUJUN FENG ZHONGHUA RUAN SHIPING WANG XIAODONG YANG LIN HU HAO FANG LONG |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120314 Effective date of abandoning: 20130717 |
|
| RGAV | Abandon patent right to avoid regrant |