CN202298757U - Constant-pressure water supply system - Google Patents
Constant-pressure water supply system Download PDFInfo
- Publication number
- CN202298757U CN202298757U CN2011203889423U CN201120388942U CN202298757U CN 202298757 U CN202298757 U CN 202298757U CN 2011203889423 U CN2011203889423 U CN 2011203889423U CN 201120388942 U CN201120388942 U CN 201120388942U CN 202298757 U CN202298757 U CN 202298757U
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- CN
- China
- Prior art keywords
- water supply
- supply system
- pressure water
- plc controller
- frequency converter
- Prior art date
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a constant-pressure water supply system comprising a PLC programmable logic controller, a multiple-way switch, a plurality of water pump motor and at least one frequency converter, wherein the multiple-way switch and the frequency converter are controlled by the PLC; the multiple-way switch is connected with a power frequency power supply; the output terminal of the frequency converter is connected with an input terminal of the multiple-way switch; the output terminals of the multiple-way switch are connected with the power supply terminals of the water pump motors; water pumped out by the water pump motors is collected in a master water supply pipe; a pressure sensor for detecting water pressure is arranged on the master water supply pipe; the output terminal of the pressure sensor is connected with the PLC; and the PLC is provided with a given pressure input port. The constant-pressure water supply system has the characteristics of high speed, flexibility in combination, strong anti-interference performance and the like, can adapt to harsh environments, and completely meets requirements.
Description
Technical field
The utility model relates to a kind of constant pressure water supply system.
Background technology
Water system partly is an indispensable important ring in the every profession and trade.Traditional way of supplying water floor space is big, and construction investment is many.And being hydraulic pressure, topmost shortcoming can not keep constant.Cause the equipment component cisco unity malfunction.
Because the special requirement of safety in production and quality of water supply has strict requirement to constant pressure water supply pressure, prior art can't reach these strict demands; And owing in a single day equipment drop into; The leeway of changing is less, and flexibility is not strong, can not in wider scope, use.
The utility model content
The utility model technical problem to be solved provides a kind of constant pressure water supply system, and this constant pressure water supply system flexibility is strong, and automaticity is high.
The technical solution of utility model is following:
A kind of constant pressure water supply system comprises PLC controller, variable connector, many pump motors and at least one frequency converter; Variable connector and frequency converter are controlled by the PLC controller; Variable connector and power frequency supply join; The input terminal of the output termination variable connector of frequency converter, the lead-out terminal of variable connector connects the feeder ear of said many pump motors; The water that many pump motors pump is pooled to total feed pipe.
Total feed pipe place is provided with the pressure sensor that is used to detect hydraulic pressure, the output termination PLC controller of pressure sensor; The PLC controller is provided with the pressure given input port.
The PLC controller is provided with the remote signal input port.
Be provided with a PID control module in the PLC controller.
The part input terminal and the power frequency supply of variable connector directly join.
Beneficial effect:
The utility model constant pressure water supply system adopts ripe converter technique, in addition; Adopt frequency converter to combine with multi-channel switch cleverly, and power frequency power supply combines with conversion power supply, easy to operate, reliable, saves energy, flexibility are strong; Automaticity is high; And, adopt the PID controller, can realize the constant of water supply pressure.Characteristics such as the speed that the utlity model has is fast, combination is flexible, strong interference immunity can be adapted to rugged environment, satisfy the requirement of constant pressure water supply system fully.
Description of drawings
Fig. 1 is the structural principle sketch map of the constant pressure water supply system of the utility model.
The specific embodiment
Below will combine accompanying drawing and specific embodiment that the utility model is explained further details:
As shown in Figure 1, a kind of constant pressure water supply system comprises pressure sensor, PLC, frequency converter, multi-channel switcher.The pressure sensor at water main place compares with setting pressure after the actual pressure of pipe network is fed back to PLC by 4-20mA, by the frequency of PLC output signal controlling frequency converter, with the control of pump rotating speed of motor.When ductwork pressure was not enough, frequency converter increased output frequency, the pump motor faster rotational speed, and output increases, and forces ductwork pressure to rise.Otherwise the pump motor rotating speed slows down, and output reduces, and ductwork pressure descends, and keeps constant pressure water supply.
According to pumping plant water supply actual conditions and demand; Design two or three water supply variable frequency pumps; Therefore except that changing the pump motor rotating speed, can also keep water pressure invariableness, when the full power frequency of process pump is drawn water when still not reaching constant voltage and requiring through the platform number of increase and decrease process pump; Need to drop into next pump operation, the method for operation is a power frequency operation, another converting operation.Otherwise,, when pressure is still too high, excise a power frequency operation pump when the frequency converter output frequency is reduced to minimum.According to the operating condition of pump group, realize the primary and secondary automatic switching function of each pump group, make each pump group frequency of utilization balanced, improve application life.Automatically the duty of identification pump group can be carried out the state transitions of pump group arbitrarily and not influenced normal water supply, is convenient to maintenance.Accomplish the automatic startup or the automatic shutdown function of system as requested, and show hydraulic pressure, each pump working state and fault alarm function.
System should make the handoff procedure of water pump between frequency converter and common frequency power network fast as far as possible when design, and with the continuity that guarantees to supply water, water pressure fluctuations is as far as possible little, thereby improves quality of water supply.But the element course of action is too fast, and having refluxes damages frequency converter.In order to prevent the generation of fault, on the hardware latch-up protection must be set.In order to prevent the generation of fault, also defence program must be set on the software, guarantee that each loop can not be closed simultaneously.When the plus-minus pump, element sequence of movement and time-delay must be set, prevent that misoperation from (being prior art) taking place.When system had just started, situation was simple, at first started a pump and got final product.But situation is complicated when considering 3 pump cooperations, and wantonly 1 or 2 pumps maybe just operations under the power frequency automated manner, and other pumps then possibly move under Frequency Converter Control, so must preestablish the order that increases and decreases water pump.After promptly obtaining plus-minus pump signal, start and stop water pump in order.
Claims (6)
1. a constant pressure water supply system is characterized in that, comprises PLC controller, variable connector, many pump motors and at least one frequency converter; Variable connector and frequency converter are controlled by the PLC controller; Variable connector and power frequency supply join; The input terminal of the output termination variable connector of frequency converter, the lead-out terminal of variable connector connects the feeder ear of said many pump motors; The water that many pump motors pump is pooled to total feed pipe.
2. constant pressure water supply system according to claim 1 is characterized in that, total feed pipe place is provided with the pressure sensor that is used to detect hydraulic pressure, the output termination PLC controller of pressure sensor; The PLC controller is provided with the pressure given input port.
3. constant pressure water supply system according to claim 1 is characterized in that the PLC controller is provided with the remote signal input port.
4. constant pressure water supply system according to claim 1 is characterized in that, is provided with a PID control module in the PLC controller.
5. constant pressure water supply system according to claim 2 is characterized in that, is provided with a PID control module in the PLC controller.
6. according to each described constant pressure water supply system of claim 1-5, it is characterized in that the part input terminal and the power frequency supply of variable connector directly join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203889423U CN202298757U (en) | 2011-10-13 | 2011-10-13 | Constant-pressure water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203889423U CN202298757U (en) | 2011-10-13 | 2011-10-13 | Constant-pressure water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202298757U true CN202298757U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203889423U Expired - Lifetime CN202298757U (en) | 2011-10-13 | 2011-10-13 | Constant-pressure water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202298757U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970082A (en) * | 2013-01-25 | 2014-08-06 | 费希尔控制国际公司 | Methods and apparatus to interface with a digital control loop |
| CN105278352A (en) * | 2014-05-28 | 2016-01-27 | 株洲变流技术国家工程研究中心有限公司 | Oil field water injection automatic control system and method thereof |
| CN105464170A (en) * | 2015-11-23 | 2016-04-06 | 嘉兴职业技术学院 | Livestock breeding 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 |
-
2011
- 2011-10-13 CN CN2011203889423U patent/CN202298757U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970082A (en) * | 2013-01-25 | 2014-08-06 | 费希尔控制国际公司 | Methods and apparatus to interface with a digital control loop |
| RU2655176C2 (en) * | 2013-01-25 | 2018-05-24 | Фишер Контролз Интернешнел Ллс | Methods and apparatus to interface with digital control loop |
| CN103970082B (en) * | 2013-01-25 | 2019-03-22 | 费希尔控制国际公司 | For the method and apparatus with digital control loop interface |
| CN105278352A (en) * | 2014-05-28 | 2016-01-27 | 株洲变流技术国家工程研究中心有限公司 | Oil field water injection automatic control system and method thereof |
| CN105278352B (en) * | 2014-05-28 | 2018-06-12 | 株洲变流技术国家工程研究中心有限公司 | Oil-field flooding automatic control system and its method |
| CN105464170A (en) * | 2015-11-23 | 2016-04-06 | 嘉兴职业技术学院 | Livestock breeding 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |