CN103388350A - Frequency-conversion constant-pressure water supply system based on PLC (Programmable Logic Controller) - Google Patents
Frequency-conversion constant-pressure water supply system based on PLC (Programmable Logic Controller) Download PDFInfo
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- CN103388350A CN103388350A CN201210145685XA CN201210145685A CN103388350A CN 103388350 A CN103388350 A CN 103388350A CN 201210145685X A CN201210145685X A CN 201210145685XA CN 201210145685 A CN201210145685 A CN 201210145685A CN 103388350 A CN103388350 A CN 103388350A
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Abstract
The invention discloses a frequency-conversion constant-pressure water supply system based on a PLC (Programmable Logic Controller). The frequency-conversion constant-pressure water supply system comprises a control processor PLC, a water storage system and a water pump set, and a frequency converter, wherein the water storage system and the water pump set are connected with the control processor PLC; and the water pump set is further connected with the frequency converter. The frequency-conversion constant-pressure water supply system disclosed by the invention has the advantages that frequency-conversion constant-pressure water supply can be solved and the aims of energy saving and environmental friendliness are realized.
Description
Technical field
The present invention relates to water system, specifically refer to the constant pressure water supply system based on PLC.
Background technology
Along with development and the progress of society, the urban skyscraper water supply problem becomes increasingly conspicuous, and requires on the one hand to improve quality of water supply, can not cause because of the fluctuation of pressure for water hazards, requires on the other hand safety and the reliability of assure feed water.And traditional water tower water-feeding mode has exposed a lot of shortcomings: the imbalance of the high ebb of water, and pipeline valve is fragile, and the maintenance expense is too high, secondary pollution of water etc.The present invention proposes the constant pressure water supply system based on PLC, to realize commercial and residential building constant pressure water supply and energy-conservation environmental requirement.
Summary of the invention
The object of the present invention is to provide the constant pressure water supply system based on PLC, this system can solve constant pressure water supply, reaches the purpose of energy-conserving and environment-protective.
Implementation of the present invention is as follows:, based on the constant pressure water supply system of PLC, comprise control processor PLC and the water storage system that is connected with control processor PLC and water pump assembly and frequency converter; Described water pump assembly also with frequency converter.
Control processor PLC, as main control unit, controls water storage system, makes water storage system as buffer area, and the water from the city pipe valve is played cushioning effect.Under the acting in conjunction of control processor PLC and frequency converter, can supply water management to water pump assembly.
Described water storage system mainly consists of the motor operated valve A that connects the city pipe valve and the water tank that is connected with motor operated valve A, motor operated valve A also is parallel with hand-operated valve A, described water tank is connected with water pump assembly, and described water pump assembly inside is provided with water level controller, and described water level controller and motor operated valve A all are connected with control processor PLC.
Further, as mentioned above, water tank in the present invention also is provided with water level controller, water level information can be transferred to control processor PLC by water level controller, under the information processing of control processor PLC, when water level is reduced to certain position, control processor PLC can give and sell the order that motor operated valve A opens, while making low water stage, motor operated valve A can open automatically, gives the water tank water-filling.Certainly time impact is supplied water in order to prevent that motor operated valve A from breaking down, and motor operated valve A of the present invention also is parallel with hand-operated valve A.
Described water pump assembly is mainly by the motor operated valve B that connects water tank, and with water lift unit, pressure sensor that motor operated valve B is connected successively, forms, and described pressure sensor is connected with control processor PLC.
Described water lift unit comprises main water lift unit and secondary water lift unit in parallel, described main water lift unit mainly consists of motor operated valve C, water pump C, the flap valve C of series connection successively, described secondary water lift unit mainly consists of motor operated valve D, water pump D, the flap valve D of series connection successively, described motor operated valve C and motor operated valve D all are connected with control processor PLC with motor operated valve B, described flap valve C and flap valve D all are connected with pressure sensor, and described water pump C and water pump D all are connected with frequency converter.
Described motor operated valve B is parallel with hand-operated valve B.
Also be provided with the motor operated valve C that discharges water that is connected control processor PLC between described flap valve C and pressure sensor; Also be provided with the motor operated valve that discharges water that is connected control processor PLC between flap valve D and pressure sensor.
The described motor operated valve C that discharges water also is connected with the tie point of pressure sensor water hammer motor operated valve, the energy storage tank that is connected successively; And described water hammer motor operated valve also is connected with control processor PLC.
Frequency converter inside is provided with the PID controller.
Further, operating principle of the present invention is: the mode that adopts two water pump operations; Water pump C is as main pump, and water pump D is as stand by pump.The Frequency Converter Control alternation of two pumps, water pump can soft start and soft stop only.So not only can reduce the impact of hydraulic pressure to pipeline, can also improve water hammer effect, avoid the damage of equipment, install simultaneously energy storage canister additional to eliminate water hammer effect.
Detect actual outlet pipe pressure by pressure sensor in work, pressure sensor becomes analog signal (voltage or current signal to the pressure signal that detects, native system adopts voltage signal), and give frequency converter this signal, by the PID controller computing in frequency converter.Control processor PLC controls frequency converter speed-raising or reduction of speed (by the multistage speed control system of frequency converter) according to the situation of pressure.When water supply volume hour, water pump of Frequency Converter Control moves under the low speed; When water supply volume was large, the Frequency Converter Control water pump moved under high speed; When water supply volume greatly or breaking out of fire and other while needing the people to measure water, control two water pumps by control processor PLC and start simultaneously, to guarantee the stable of pressure.In order to extend the application life of water pump, allow the periodic duty in every 4 hours of two water pumps, with avoid water pump for a long time need not and get rusty.
Further, in order to facilitate Inlet and outlet water, the present invention is provided with motor operated valve B as the water inlet main valve.The operations such as while convenient for maintaining, the present invention still has flap valve C, motor operated valve C and flap valve D and the motor operated valve D that discharges water discharge water.Motor operated valve C and all control of restricted processor P LC of motor operated valve D that discharges water discharge water.
The invention has the advantages that: can solve constant pressure water supply, reach the purpose of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention.
The specific embodiment
Embodiment one
As shown in Figure 1.
, based on the constant pressure water supply system of PLC, comprise control processor PLC and the water storage system that is connected with control processor PLC and water pump assembly and frequency converter; Described water pump assembly also with frequency converter.Water storage system mainly consists of the motor operated valve A that connects the city pipe valve and the water tank that is connected with motor operated valve A, motor operated valve A also is parallel with hand-operated valve A, described water tank is connected with water pump assembly, and described water pump assembly inside is provided with water level controller, and described water level controller and motor operated valve A all are connected with control processor PLC.
Control processor PLC, as main control unit, controls water storage system, makes water storage system as buffer area, and the water from the city pipe valve is played cushioning effect.Under the acting in conjunction of control processor PLC and frequency converter, can supply water management to water pump assembly.
Water tank in the present invention also is provided with water level controller, water level information can be transferred to control processor PLC by water level controller, under the information processing of control processor PLC, when water level is reduced to certain position, control processor PLC can give and sell the order that motor operated valve A opens, while making low water stage, motor operated valve A can open automatically, gives the water tank water-filling.Certainly time impact is supplied water in order to prevent that motor operated valve A from breaking down, and motor operated valve A of the present invention also is parallel with hand-operated valve A.
Water pump assembly is mainly by the motor operated valve B that connects water tank, and with water lift unit, pressure sensor that motor operated valve B is connected successively, forms, and described pressure sensor is connected with control processor PLC.The water lift unit comprises main water lift unit and secondary water lift unit in parallel, described main water lift unit mainly consists of motor operated valve C, water pump C, the flap valve C of series connection successively, described secondary water lift unit mainly consists of motor operated valve D, water pump D, the flap valve D of series connection successively, described motor operated valve C and motor operated valve D all are connected with control processor PLC with motor operated valve B, described flap valve C and flap valve D all are connected with pressure sensor, and described water pump C and water pump D all are connected with frequency converter.Described motor operated valve B is parallel with hand-operated valve B.Also be provided with the motor operated valve C that discharges water that is connected control processor PLC between flap valve C and pressure sensor; Also be provided with the motor operated valve that discharges water that is connected control processor PLC between flap valve D and pressure sensor.The motor operated valve C that discharges water also is connected with the tie point of pressure sensor water hammer motor operated valve, the energy storage tank that is connected successively; And described water hammer motor operated valve also is connected with control processor PLC.
Frequency converter inside is provided with the PID controller.
The present invention adopts the mode of two water pump operations; Water pump C is as main pump, and water pump D is as stand by pump.The Frequency Converter Control alternation of two pumps, water pump can soft start and soft stop only.So not only can reduce the impact of hydraulic pressure to pipeline, can also improve water hammer effect, avoid the damage of equipment, install simultaneously energy storage canister additional to eliminate water hammer effect.
Detect actual outlet pipe pressure by pressure sensor in work, pressure sensor becomes analog signal (voltage or current signal to the pressure signal that detects, native system adopts voltage signal), and give frequency converter this signal, by the PID controller computing in frequency converter.Control processor PLC controls frequency converter speed-raising or reduction of speed (by the multistage speed control system of frequency converter) according to the situation of pressure.When water supply volume hour, water pump of Frequency Converter Control moves under the low speed; When water supply volume was large, the Frequency Converter Control water pump moved under high speed; When water supply volume greatly or breaking out of fire and other while needing the people to measure water, control two water pumps by control processor PLC and start simultaneously, to guarantee the stable of pressure.In order to extend the application life of water pump, allow the periodic duty in every 4 hours of two water pumps, with avoid water pump for a long time need not and get rusty.In order to facilitate Inlet and outlet water, the present invention is provided with motor operated valve B as the water inlet main valve.The operations such as while convenient for maintaining, the present invention still has flap valve C, motor operated valve C and flap valve D and the motor operated valve D that discharges water discharge water.Motor operated valve C and all control of restricted processor P LC of motor operated valve D that discharges water discharge water.
As mentioned above, can well realize the present invention.
Claims (8)
1., based on the constant pressure water supply system of PLC, it is characterized in that: comprise control processor PLC and the water storage system that is connected with control processor PLC and water pump assembly and frequency converter.
2. the system of the constant pressure water supply based on PLC according to claim 1, it is characterized in that: described water storage system mainly consists of the motor operated valve A that connects the city pipe valve and the water tank that is connected with motor operated valve A, motor operated valve A also is parallel with hand-operated valve A, described water tank is connected with water pump assembly, and described water pump assembly inside is provided with water level controller, and described water level controller and motor operated valve A all are connected with control processor PLC.
3. the system of the constant pressure water supply based on PLC according to claim 2, it is characterized in that: described water pump assembly is mainly by the motor operated valve B that connects water tank, and with water lift unit, pressure sensor that motor operated valve B is connected successively, form, described pressure sensor is connected with control processor PLC.
4. the system of the constant pressure water supply based on PLC according to claim 3, it is characterized in that: described water lift unit comprises main water lift unit and secondary water lift unit in parallel, described main water lift unit is mainly by the motor operated valve C that connects successively, water pump C, flap valve C forms, described secondary water lift unit is mainly by the motor operated valve D that connects successively, water pump D, flap valve D forms, described motor operated valve C and motor operated valve D all are connected with control processor PLC with motor operated valve B, described flap valve C and flap valve D all are connected with pressure sensor, and described water pump C and water pump D all are connected with frequency converter.
5. the system of the constant pressure water supply based on PLC according to claim 3, it is characterized in that: described motor operated valve B is parallel with hand-operated valve B.
6. the system of the constant pressure water supply based on PLC according to claim 3 is characterized in that: also be provided with the motor operated valve C that discharges water that is connected control processor PLC between described flap valve C and pressure sensor; Also be provided with the motor operated valve that discharges water that is connected control processor PLC between flap valve D and pressure sensor.
7. the system of the constant pressure water supply based on PLC according to claim 6, it is characterized in that: the described motor operated valve C that discharges water also is connected with the tie point of pressure sensor water hammer motor operated valve, the energy storage tank that is connected successively; And described water hammer motor operated valve also is connected with control processor PLC.
8. the described system of constant pressure water supply based on PLC of any one according to claim 1-7, it is characterized in that: frequency converter inside is provided with the PID controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210145685XA CN103388350A (en) | 2012-05-11 | 2012-05-11 | Frequency-conversion constant-pressure water supply system based on PLC (Programmable Logic Controller) |
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| CN201210145685XA CN103388350A (en) | 2012-05-11 | 2012-05-11 | Frequency-conversion constant-pressure water supply system based on PLC (Programmable Logic Controller) |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314140A (en) * | 2014-11-11 | 2015-01-28 | 宁夏嘉翔自控技术有限公司 | Control device for water well pump of water well PLC controlled tap water supply system |
| CN104452895A (en) * | 2014-11-11 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Central control device of water well PLC controlled taper water supply system |
| CN104452896A (en) * | 2014-11-11 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Device for controlling water well water pump of tap water supply system through central PLC |
| CN104532906A (en) * | 2014-12-02 | 2015-04-22 | 长沙新顺昌水净化设备有限公司 | Automatic water supply device and method |
| CN107447812A (en) * | 2017-09-11 | 2017-12-08 | 浙江志展智能科技有限公司 | A kind of intelligent networking formula control system of water pump |
| CN108708435A (en) * | 2018-07-16 | 2018-10-26 | 红塔烟草(集团)有限责任公司 | A kind of frequency conversion water supply facility and method of central water supply system |
| CN110259660A (en) * | 2019-06-19 | 2019-09-20 | 江苏师范大学 | A kind of Expert Rules PID constant pressure water supply system and method based on PLC |
| WO2023280037A1 (en) * | 2021-07-05 | 2023-01-12 | 西安热工研究院有限公司 | Operation protection system for condensate polishing |
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| CN104314140A (en) * | 2014-11-11 | 2015-01-28 | 宁夏嘉翔自控技术有限公司 | Control device for water well pump of water well PLC controlled tap water supply system |
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| CN104532906A (en) * | 2014-12-02 | 2015-04-22 | 长沙新顺昌水净化设备有限公司 | Automatic water supply device and method |
| CN107447812A (en) * | 2017-09-11 | 2017-12-08 | 浙江志展智能科技有限公司 | A kind of intelligent networking formula control system of water pump |
| CN108708435A (en) * | 2018-07-16 | 2018-10-26 | 红塔烟草(集团)有限责任公司 | A kind of frequency conversion water supply facility and method of central water supply system |
| CN110259660A (en) * | 2019-06-19 | 2019-09-20 | 江苏师范大学 | A kind of Expert Rules PID constant pressure water supply system and method based on PLC |
| WO2023280037A1 (en) * | 2021-07-05 | 2023-01-12 | 西安热工研究院有限公司 | Operation protection system for condensate polishing |
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Application publication date: 20131113 |