CN202579138U - Variable frequency power-saving control system of circulating pump - Google Patents
Variable frequency power-saving control system of circulating pump Download PDFInfo
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- CN202579138U CN202579138U CN 201220201085 CN201220201085U CN202579138U CN 202579138 U CN202579138 U CN 202579138U CN 201220201085 CN201220201085 CN 201220201085 CN 201220201085 U CN201220201085 U CN 201220201085U CN 202579138 U CN202579138 U CN 202579138U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000003828 downregulation Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 230000003827 upregulation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The utility model relates to a variable frequency power-saving control system of a circulating pump. The variable frequency power-saving control system of the circulating pump comprises a frequency converter, a PID (Proportion Integration Differentiation) regulator serving as a signal processing unit, a pressure transmitter and a breaker, wherein the pressure transmitter is arranged on a pipeline which is connected with a water outlet pipe of the circulating pump; an output end of the pressure transmitter is connected with an input end of the PID regulator; an output end of the PID regulator is connected with an input end of a control signal of the frequency converter; an output end of the frequency converter is connected with a power input end of the circulating pump; and a mains power supply is connected with a power input end of the frequency converter through the breaker. According to the variable frequency power-saving control system, the frequency converter is used for automatically performing up and down regulation on the frequency according to variation in load (variation in water supply capacity), so that the rotation speed of the circulating pump is changed, and output power of a motor of the circulating pump changes along with change of the load; and thus, the water supply of the circulating pump is regulated, the pump efficiency is also utilized better, and electric energy is effectively saved.
Description
Technical field
The utility model relates to a kind of water pump, relates in particular to a kind of circulating water pump frequency conversion power saving control system.
Background technique
At present along with the industrial fast development of China; Various water pumps have been widely applied in our daily commercial production and the life, because the dragging motor of many water pumps all is in permanent rotation speed operation state, and the water flow in producing requires to be in the dynamic operation condition operation; Also have many enterprises when carrying out system design; Capacity Selection must be bigger, and system matches is unreasonable, often " low load with strong power ".And in PET industry, the water output of recirculated cooling water pump summer consumption very big, the surplus of adjusting is little, and to spring, the autumn fluctuations along with ambient temperature, the water output of circulating water pump alters a great deal.The water output of circulating water pump adjusting at present generally is to utilize the aperture size that is installed in the valve on the pipeline to regulate, and inconvenient operation is also inaccurate; And the circulating water pump working state does not change; No matter water output size, circulating water pump cause the mass energy waste still in the same power consumption.
Summary of the invention
The utility model mainly solves the water output of original circulating water pump and regulates by valve control, and inconvenient operation is also inaccurate, and no matter the water output size, circulating water pump causes the technical problem of mass energy waste still in the same power consumption; A kind of circulating water pump frequency conversion power saving control system is provided, and it has both regulated the water output of circulating water pump through circulating water pump is carried out VFC, has utilized pump efficiency again better, effectively saving power.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals: the utility model comprises frequency variator, signal processing unit and pressure transmitter; Pressure transmitter is installed on the pipeline that links to each other with the outlet pipe of circulating water pump; The output terminal of pressure transmitter links to each other with the input end of described signal processing unit; The control signal input end of the output terminal of signal processing unit and described frequency variator links to each other, and the output terminal of frequency variator links to each other with the power input of circulating water pump.In control system of water pump, also have at present and use variable-frequency control technique, but all be adopt open loop control mode, promptly change the frequency values of frequency variator artificially according to the variation of technology or ambient conditions, to reach the speed governing purpose.And the utility model is to adopt close-loop control mode to realize the operation frequency of control frequency variator automatically, thereby reaches the purpose of circulating water pump speed governing, finally realizes the adjusting of water output.Gather the hydraulic pressure in the circulating water pump water pipe by pressure transmitter, and convert corresponding with it 4～20mA normalized current signal to, flow to signal processing unit; There is working procedure signal processing unit inside; Through the processing of working procedure, the controlling index required with technology compares, and must deviate; Its deviate is carried out computing by signal processing unit by the adjusting rule of predesignating and is drawn regulated signal; Flow to the control signal input end of frequency variator, frequency variator converts control signal to 0～60Hz (or 0～400Hz) operation frequency, the operation of control circle water pump again.Certainly under common operating mode, the operation frequency of water pump is generally moved between 0～50Hz.In the utility model; Frequency variator can carry out the frequency up-down adjustment automatically according to the variation (variation of water consumption) of load, thereby changes the rotating speed of water pump; The output power that makes pump motor changes with the variation of load, is issued to energy-conservation to greatest extent in the prerequisite that satisfies usage requirement.
When water pump is controlled with valve, reduce flow, must close minor valve, at this moment the frictional resistance of valve becomes big.That is to say during with the valve controlling flow amount, have power to be depleted and slatterned, and along with valve constantly turns down, this loss to increase also.
When adopting the speed regulating control of the utility model; Because pump characteristics depends on rotating speed, when controlling with rotating speed, according to centrifugal pump curve formula; Because flow is directly proportional with the first power of rotating speed; Square being directly proportional of lift and rotating speed, cube being directly proportional of air horsepower and rotating speed, promptly power becomes the relation of 3 powers to descend with rotating speed.So as long as lower motor speed, under the situation of the same flow of transhipment, originally consumption just can be avoided at the power of valve fully so, so can obtain good energy-saving effect, the principle of Here it is the utility model pump variable frequency variable speed energy saving.
As preferably, described signal processing unit is the PID regulator.Make control convenient, also more accurate.
As preferably, described circulating water pump frequency conversion power saving control system comprises circuit breaker, and the mains-supplied power supply links to each other through the power input of circuit breaker and described frequency variator.The break-make electricity of frequency variator is realized through switching circuit breaker, is used safer.
The beneficial effect of the utility model is: frequency variator is according to the variation (variation of water output) of load; Automatically carry out the frequency up-down adjustment; Thereby change the rotating speed of circulating water pump, the output power that makes circulation-water pump electric machine changes with the variation of load, has both regulated the water output of circulating water pump; Utilized pump efficiency again better, effectively saving power.
Description of drawings
Fig. 1 is a kind of system linkage structure schematic representation of the utility model.
1. frequency variators among the figure, 2. PID regulator, 3. pressure transmitter, 4. circulating water pump, 5. circuit breaker.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technological scheme of the utility model.
Embodiment: the circulating water pump frequency conversion power saving control system of present embodiment; As shown in Figure 1; Comprise frequency variator 1, PID regulator 2, pressure transmitter 3 and circuit breaker 5 as signal processing unit; Pressure transmitter 3 is installed on the pipeline that links to each other with the outlet pipe of circulating water pump 4, and the output terminal of pressure transmitter 3 links to each other with the input end of PID regulator 2, and the control signal input end of the output terminal of PID regulator 2 and frequency variator 1 links to each other; The output terminal of frequency variator 1 links to each other with the power input of circulating water pump 4, and the mains-supplied power supply links to each other through the power input of circuit breaker 5 with frequency variator 1.
Working procedure: earlier detect the pressure of the water in the pumping line by being contained in pressure transmitter on the pipeline; And convert corresponding with it 4～20mA normalized current signal to; Give PID regulator; By PID regulator internal processes this signal and the required controlling index of technology are compared, must deviate, its deviate is carried out computing by the PID regulator by the adjusting rule of predesignating and is drawn regulated signal; This regulated signal is directly given the control signal input end of frequency variator; The signal conversion that frequency variator is brought the PID regulator again becomes 0～60Hz, and (or 0～400Hz) operation frequency, certainly under common operating mode, the operation frequency of water pump is generally moved between 0～50Hz.Through the adjusting of PID regulator, frequency variator can carry out the frequency up-down adjustment automatically according to the variation (variation of water consumption) of load, thereby changes the rotating speed of water pump, changes and carries the water yield.The utility model adopts the frequency variator closed loop control, can carry out software configuration and setting temperature on demand and carry out the PID adjusting, and the pump motor output power is changed with the variation of thermal load, is issued to energy-conservation to greatest extent purpose in the prerequisite that satisfies usage requirement.
Performance evaluation:
(1) adopts the frequency variator closed loop control, can carry out software configuration on demand and set pressure of supply water and carry out PID and regulate, the pump motor output power is changed with the variation of load pressure of supply water, be issued to energy-conservation to greatest extent in the prerequisite that satisfies usage requirement.Generally in the spring and autumn operation, power saving rate is higher, can reach 40%, and summer is large usage quantity because user itself loads, and the economize on electricity space is more limited.
(2) because fall-back and soft starting shipment have been reduced vibration, noise and wearing and tearing, prolonged device maintenance cycle and working life, reduced the maintenance maintenance workload, and reduced impact, improved the reliability of system electrical network.(3) system has various protective measures, and the running rate of system and safety reliability are improved greatly.
Claims (3)
1. circulating water pump frequency conversion power saving control system; It is characterized in that comprising frequency variator (1), signal processing unit and pressure transmitter (3); Pressure transmitter (3) is installed on the pipeline that links to each other with the outlet pipe of circulating water pump (4); The output terminal of pressure transmitter (3) and the input end of described signal processing unit link to each other; The output terminal of signal processing unit links to each other with the control signal input end of described frequency variator (1), and the output terminal of frequency variator (1) links to each other with the power input of circulating water pump (4).
2. circulating water pump frequency conversion power saving control system according to claim 1 is characterized in that described signal processing unit is PID regulator (2).
3. circulating water pump frequency conversion power saving control system according to claim 1 and 2 is characterized in that comprising circuit breaker (5), and the mains-supplied power supply links to each other through the power input of circuit breaker (5) with described frequency variator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220201085 CN202579138U (en) | 2012-05-08 | 2012-05-08 | Variable frequency power-saving control system of circulating pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220201085 CN202579138U (en) | 2012-05-08 | 2012-05-08 | Variable frequency power-saving control system of circulating pump |
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| Publication Number | Publication Date |
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| CN202579138U true CN202579138U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220201085 Expired - Lifetime CN202579138U (en) | 2012-05-08 | 2012-05-08 | Variable frequency power-saving control system of circulating pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675686A (en) * | 2015-01-01 | 2015-06-03 | 山西太钢不锈钢股份有限公司 | Automatic adjusting method of water supply pressure |
| CN105179217A (en) * | 2015-09-02 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | Constant-temperature automatic control system for circulation water pumps |
| CN105179216A (en) * | 2015-09-02 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | Constant-temperature automatic control system for frequency stabilized vibration type water pumps based on phase-sensitive detection circuit |
| CN105201803A (en) * | 2015-09-02 | 2015-12-30 | 宁波摩米创新工场电子科技有限公司 | Automatic constant temperature control system based on frequency stabilization circuit and applied to a circulating water pump |
| CN108286525A (en) * | 2017-12-29 | 2018-07-17 | 南京钢铁股份有限公司 | Water supply frequency conversion pump group running frequency optimization method |
| CN114483556A (en) * | 2022-01-25 | 2022-05-13 | 上海阿波罗机械股份有限公司 | Intelligent control variable frequency driving circulating water pump for nuclear power plant |
-
2012
- 2012-05-08 CN CN 201220201085 patent/CN202579138U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675686A (en) * | 2015-01-01 | 2015-06-03 | 山西太钢不锈钢股份有限公司 | Automatic adjusting method of water supply pressure |
| CN105179217A (en) * | 2015-09-02 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | Constant-temperature automatic control system for circulation water pumps |
| CN105179216A (en) * | 2015-09-02 | 2015-12-23 | 宁波摩米创新工场电子科技有限公司 | Constant-temperature automatic control system for frequency stabilized vibration type water pumps based on phase-sensitive detection circuit |
| CN105201803A (en) * | 2015-09-02 | 2015-12-30 | 宁波摩米创新工场电子科技有限公司 | Automatic constant temperature control system based on frequency stabilization circuit and applied to a circulating water pump |
| CN105179216B (en) * | 2015-09-02 | 2017-03-08 | 宁波摩米创新工场电子科技有限公司 | Frequency stabilization oscillatory type water pump constant-temperature automatic control system based on phase-sensitive detection circuit |
| CN105201803B (en) * | 2015-09-02 | 2017-03-29 | 宁波摩米创新工场电子科技有限公司 | Water circulating pump constant-temperature automatic control system based on frequency stabilization oscillating circuit |
| CN105179217B (en) * | 2015-09-02 | 2017-04-26 | 宁波摩米创新工场电子科技有限公司 | Constant-temperature automatic control system for circulation water pumps |
| CN108286525A (en) * | 2017-12-29 | 2018-07-17 | 南京钢铁股份有限公司 | Water supply frequency conversion pump group running frequency optimization method |
| CN114483556A (en) * | 2022-01-25 | 2022-05-13 | 上海阿波罗机械股份有限公司 | Intelligent control variable frequency driving circulating water pump for nuclear power plant |
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Granted publication date: 20121205 |
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| CX01 | Expiry of patent term |