CN201964390U - Automatic control device for intelligent power-saving device - Google Patents
Automatic control device for intelligent power-saving device Download PDFInfo
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- CN201964390U CN201964390U CN201020686545XU CN201020686545U CN201964390U CN 201964390 U CN201964390 U CN 201964390U CN 201020686545X U CN201020686545X U CN 201020686545XU CN 201020686545 U CN201020686545 U CN 201020686545U CN 201964390 U CN201964390 U CN 201964390U
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- liquid level
- signal
- boiler
- frequency converter
- boiler liquid
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Abstract
The utility model discloses an automatic control device for an intelligent power-saving device, which comprises a liquid level sensor of a boiler, a liquid level transmitter, a PID (proportion integration differentiation) regulator and a frequency converter, wherein the frequency converter controls the operation of a motor of a water pump according to a set program and a liquid level feedback signal of the boiler so as to track the change of the liquid level in real time and adjust the water supply flow. The utility model also discloses a control method of the automatic control device. The automatic tracking is performed on the liquid level signal of the boiler acquired by the liquid level sensor of the boiler by adopting the frequency conversion technology to adjust and control the operation of the motor in real time so as to adjust the water supply flow, and therefore, the liquid level of the boiler is always kept under a good condition; at the same time as the safety operation of the boiler is ensured, the automatic control device is also beneficial for reducing the operation noise and heat generated by the motor and the water pump, reducing the leakage of a pipeline system due to high pressure, lowering the maintenance cost for valves, pipe fittings and the like, and prolonging the service life of the equipment; moreover, the automatic control device is efficient, energy-saving, safe and reliable.
Description
Technical field
The utility model relates to motor power saving control field, relates in particular to intelligent energy-saving electric appliance and utilizes converter technique to make the boiler feed pump system motors be in the automaton of economical operation state.
Background technology
In Industrial Boiler, feed pump extensively adopts three-phase AC asynchronous motor as power source, control for the boiler feedwater state, it generally is load condition according to boiler, height according to water level in the boiler drum comes valve operation is realized regulating, thereby changes feedwater flow to satisfy the boiler feed water demand; But in actual use, no matter all heavy duty runnings under big pressure state of the height of liquid level in the motor drum, and operate at all the time under the rated speed state, the bigger waste of energy caused; At present utilize converter technique to take the mode of constant pressure water supply that the input voltage and the frequency of motor are regulated usually, make it to be in the efficient higher state to reach energy-conservation purpose.Yet when boiler load fluctuates bigger, be that quantity of steam changes greatly also frequent variations of hourly water consumption, only under the constant situation of setting pressure, implement feed pressure closed-loop control be hard to keep boiler feed capacity and actual needs amount phase equilibrium, more energy dissipation is still arranged, and therefore there is limitation in energy-conservation space.
Summary of the invention
The purpose of this utility model is to overcome the intelligent energy-saving device the deficiencies in the prior art, provides a kind of and realizes the intelligent energy-saving electric appliance automaton that boiler feedwater is controlled according to the boiler liquid level signal, with raising energy-saving device efficient, and keeps boiler liquid level safety.
For achieving the above object, the utility model adopts following technical scheme:
A kind of intelligent energy-saving electric appliance automaton is characterized in that comprising:
The boiler liquid level sensor is used to gather the boiler liquid level signal;
Fluid level transmitter, its signal input part is connected with the signal output part of boiler liquid level sensor, receives described boiler liquid level signal, and is converted to standard electric signal output;
PID (Proportion Integration Differentiation, PID) adjusting apparatus, its signal input part is connected with the signal output part of fluid level transmitter, receives described standard electric signal, and realizes the output of boiler liquid level feedback standards signal controlling;
Frequency converter, its input end of analog signal is connected with the signal output part of PID adjusting apparatus, receives described boiler liquid level feedback standards signal, and according to the program of setting and the running of boiler liquid level feedback standards signal control motor.
Automaton of the present utility model automatically adjusts except the step that can adopt above-mentioned control method, can also take the manual intervention manual adjustments.By respectively with frequency converter on the manual increment, manual increment button that decrement control signal input is connected that are provided with and manual decrement button, operating personnel can directly control the running status of pump motor, regulate feedwater flow and control boiler water level.
This intelligent energy-saving electric appliance comprises the steps: with the control method of automaton
(1) obtains the boiler liquid level signal from the boiler liquid level sensor;
(2) by fluid level transmitter the boiler liquid level sensor is converted to the standard electric signal;
(3) the standard electric signal of fluid level transmitter being exported by the PID adjusting apparatus is converted to controllable boiler liquid level feedback standards signal;
(4) boiler liquid level feedback standards signal is input to the input end of analog signal of frequency converter;
(5) according to the characteristic of analog input signal, the input signal kind selector switch on the frequency converter master control operating system panel is placed the electric current gear;
(6) setup parameter comprises:
Setting is controlled by external channel;
The input of configuration switch amount is by Keyboard Control;
Setting is controlled by the PID adjusting apparatus;
Setting is controlled jointly by switching value and analog quantity;
The capping frequency, 100% of corresponding analog quantity;
Set lower frequency limit, the minimum of a value of corresponding analog quantity;
Set the starting switch control signal, bring into operation;
Set the PID functional parameter.
Because the utility model adopts the frequency conversion power saving technology, in input current, there is fractional harmonic, for preventing to exert an influence to the normal operation of surrounding devices, the filter unit that this device employing is made of reactance and electric capacity suppresses the harmonic wave with the filtering input, thereby the comprehensive harmonic value of system is controlled at allowed band.
The beneficial effects of the utility model are:
1, the utility model employing converter technique is carried out from motion tracking the boiler liquid level signal of boiler liquid level sensor collection, regulate the running of motor in real time, thereby adjusting feedwater flow, make boiler liquid level remain good condition, when guaranteeing safe operation of the boiler, also help the operation noise, the caloric value that reduce motor and water pump, reduce the leakage that pipe-line system produces because of high pressure, reduce the maintenance cost of valve, pipe fitting etc., help prolonging the service life of equipment.
2, the utility model is provided with manual intervention manual adjustments circuit, and when automatic control circuit broke down, operating personnel can directly control the running status of water pump, has strengthened the security of system's operation.
3, the utility model adopts the filter unit that is made of reactance component and capacity cell to suppress and the harmonic wave of filtering input, thereby the comprehensive harmonic value of system is controlled at allowed band, and is effectively simple.
4, utilize automaton of the present utility model, power saving rate can reach 15%～45% under the boiler normal running load, has energy-efficient, safe and reliable advantage.
Description of drawings
Fig. 1 is a boiler water pump motor liquid level control electric diagram.
The specific embodiment
As shown in Figure 1, intelligent energy-saving electric appliance of the present utility model comprises with automaton:
The boiler liquid level sensor is used to gather the boiler liquid level signal;
Fluid level transmitter LT, its signal input part is connected with the signal output part of boiler liquid level sensor, receives the boiler liquid level signal, and is converted to the standard electric signal output of 4～20mA;
The PID adjusting apparatus, its signal input part is connected with the signal output part of fluid level transmitter, receives the standard electric signal of 4～20mA, and is converted to the boiler liquid level feedback standards signal output of 4～20mA;
Frequency converter U1, its input end of analog signal AI2, GND are connected with the signal output part of PID adjusting apparatus, and GND represents simulation ground.
Be connected with air switch QF, contactor KM1 and reactance component L1 between input R1, S1, T1 and the three-phase alternating-current supply of the three-phase alternating-current supply of frequency converter U1, be connected with reactance component L3 between three-phase alternating current source output terminal U1, V1, W1 and the pump motor M of frequency converter U1.
As shown in Figure 1, input R1, the S1 of the three-phase alternating-current supply of frequency converter U1, T1 have also connected reactance component L2 and capacity cell C, reactance component L3, L2 and capacity cell C have formed filter unit, be used to suppress harmonic wave with the filtering input, weaken the humorous wave interference that adopts converter technique to produce, the comprehensive harmonic wave of system is controlled in the allowed band.QF represents jettron among the figure, and KM1 represents contactor.
Frequency converter U1 is provided with and starts operation control input end DI1, is connected with gate-controlled switch between the digital common port COM of frequency converter U1 and the startup operation control input end DI1.In this specific embodiment, gate-controlled switch adopts relay K A1, and a pair of normally open contact of relay K A1 is used to start run signal.
In this specific embodiment, PID adjusting apparatus model adopts the Kunlun, Beijing seashore XSC5-BFITOC, the supporting fluid level transmitter that transmitter LT adopts boiler to carry.
As shown in Figure 1, utilize frequency converter U1, pump motor M, boiler liquid level sensor, fluid level transmitter LT and PID adjusting apparatus etc. to form closed-loop system, according to the range requirement of the feed pressure in the boiler drum, working water level, and systematic parameter carried out program setting.The boiler liquid level sensor collects the actual liquid level signal of boiler, convert 4～20mA standard electric signal to by fluid level transmitter LT, handle through the PID adjusting apparatus again, the boiler liquid level of output 4～20mA controls signal to frequency converter U1 input end of analog signal AI2, the running that frequency converter U1 controls motor according to the program and the boiler liquid level feedback standards signal of setting, feedwater flow is regulated in the variation of real-time tracking liquid level.If satisfy systematic parameter set-point condition, then frequency converter U1 regulates output frequency automatically, thereby change rotating speed of motor and input power, make motor operate in best energy consumption point all the time, reduced because the constant excess loss that causes of pressure reaches the purpose to boiler water level is followed the tracks of and feedwater flow is controlled.
According to the safety requirements of boiler operatiopn water level, satisfying under the prerequisite of water injection pressure, control boiler water level fluctuation change on scope, adopt boiler liquid level feedback standards signal to control the rotating speed of pump motor in real time, can reach purpose of energy saving.
The utility model intelligent energy-saving electric appliance comprises the steps: with the control method of automaton
(1) obtains the boiler liquid level signal from the boiler liquid level sensor;
(2) by fluid level transmitter the boiler liquid level sensor is converted to the standard electric signal;
(3) the standard electric signal of fluid level transmitter being exported by the PID adjusting apparatus is converted to controllable boiler liquid level feedback standards signal;
(4) boiler liquid level feedback standards signal is input to the input end of analog signal of frequency converter;
(5) according to the characteristic of analog input signal, the input signal kind selector switch on the frequency converter master control operating system panel is placed the electric current gear;
(6) setup parameter comprises:
F0-02 is made as 1, promptly sets by external channel and controls;
F0-03 is made as 1, i.e. configuration switch amount input is by Keyboard Control;
F0-04 is made as 8, sets and is controlled by PID;
F0-07 is made as 1, sets and is controlled jointly by switching value and analog quantity;
F0-12 is made as 49, upper limiting frequency setting, 100% of corresponding analog quantity;
F0-14 is made as 30, lower frequency limit setting, the minimum of a value of corresponding analog quantity;
F4-00 is made as 1, sets the starting switch control signal, brings into operation;
FA group PID functional parameter is set.
Wherein F0-02～F0-04, F0-07, F0-12, F0-14, F4-00 and FA presentation function code.
Be provided with through above functional parameter programming, frequency converter is according to the running of boiler liquid level feedback standards signal control motor, and feedwater flow is regulated in the variation of real-time tracking liquid level, realizes best economical operation state, reaches purpose of saving.
Usually, boiler liquid level feedback standards signal also can obtain from boiler DCS (Distributed Contorl System, Distributed Control System).
Native system can also be taked the manual intervention manual adjustments except realizing above-mentioned automatic adjusting according to boiler water level.As Fig. 1, frequency converter U1 is provided with manual increment signal input DI4 and manual decrement signals input DI5, be connected with manual increment button SB1 between numeral common port COM and the manual increment signal input DI4, be connected with manual decrement button SB2 between numeral common port COM and the manual decrement signals input DI5, operating personnel can directly control the running status of pump motor, regulate feedwater flow and control boiler water level.
Claims (6)
1. intelligent energy-saving electric appliance automaton is characterized in that comprising:
The boiler liquid level sensor is used to gather the boiler liquid level signal;
Fluid level transmitter, its signal input part is connected with the signal output part of boiler liquid level sensor, receives described boiler liquid level signal, and is converted to standard electric signal output;
The PID adjusting apparatus, its signal input part is connected with the signal output part of fluid level transmitter, receives described standard electric signal, and realizes the control output of boiler liquid level standard signal;
Frequency converter, its input end of analog signal is connected with the signal output part of PID adjusting apparatus, receives described boiler liquid level standard signal, and according to the program of setting and the running of boiler liquid level feedback standards signal controlling pump motor.
2. intelligent energy-saving electric appliance automaton as claimed in claim 1, it is characterized in that described frequency converter is provided with startup operation control input end (DI1), is connected with gate-controlled switch between the digital common port (COM) of frequency converter and the startup operation control input end (DI1).
3. intelligent energy-saving electric appliance automaton as claimed in claim 2 is characterized in that described gate-controlled switch is a relay.
4. intelligent energy-saving electric appliance automaton as claimed in claim 1 is characterized in that described frequency converter is provided with manual increment signal input (DI4), is connected with button between the digital common port (COM) of frequency converter and the manual increment signal input (DI4).
5. intelligent energy-saving electric appliance automaton as claimed in claim 1 is characterized in that described frequency converter is provided with manual decrement signals input (DI5), is connected with button between the digital common port (COM) of frequency converter and the manual decrement signals input (DI5).
6. intelligent energy-saving electric appliance automaton as claimed in claim 1 is characterized in that being connected with on the three-phase alternating-current supply input of described frequency converter the filter unit that reactance component and capacity cell are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020686545XU CN201964390U (en) | 2010-12-29 | 2010-12-29 | Automatic control device for intelligent power-saving device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020686545XU CN201964390U (en) | 2010-12-29 | 2010-12-29 | Automatic control device for intelligent power-saving device |
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| CN201964390U true CN201964390U (en) | 2011-09-07 |
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| CN201020686545XU Expired - Fee Related CN201964390U (en) | 2010-12-29 | 2010-12-29 | Automatic control device for intelligent power-saving device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402718A (en) * | 2015-11-26 | 2016-03-16 | 湖南华信稀贵科技有限公司 | Water supply system of fuming furnace waste heat boiler |
-
2010
- 2010-12-29 CN CN201020686545XU patent/CN201964390U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402718A (en) * | 2015-11-26 | 2016-03-16 | 湖南华信稀贵科技有限公司 | Water supply system of fuming furnace waste heat boiler |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20141229 |
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| EXPY | Termination of patent right or utility model |