CN207673927U - A kind of New Type Proportional valve-driving circuit - Google Patents
A kind of New Type Proportional valve-driving circuit Download PDFInfo
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- CN207673927U CN207673927U CN201721697248.3U CN201721697248U CN207673927U CN 207673927 U CN207673927 U CN 207673927U CN 201721697248 U CN201721697248 U CN 201721697248U CN 207673927 U CN207673927 U CN 207673927U
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Abstract
The utility model is related to a kind of New Type Proportional valve-driving circuit, technical characterstic is：Including signal acquisition circuit, signal compensation circuit, signal isolation drive amplification circuit, triangle wave generating circuit, voltage reference circuit and anti-reverse power connection circuit；Signal acquisition circuit connects input signal and voltage reference circuit, the signal acquisition circuit output connection signal compensation circuit, the signal compensation circuit output end connection signal isolation drive amplifying circuit, triangle wave generating circuit end connection signal isolation drive amplifying circuit is used for drive control by signal isolation drive amplification circuit output ON signal and OFF signal.The utility model is designed reasonably, avoid ratio valve coil fast conducting, the interference that the high-frequency impulse that cut-off generates generates control system, signal isolation drive amplification circuit uses PWM pulse modulation technologies, various types of ratio valve coil can be applicable in, adaptability is stronger, and regulation performance is superior.
Description
Technical field
The utility model belongs to governor technical field, especially a kind of New Type Proportional valve-driving circuit.
Background technology
With advances in technology, product up-gradation is more and more high oil pressure proportioning valve governor by governor industry.This
Kind governor has at low cost, advantages of simple structure and simple, is the main trend of industry development and the first choice of power plant retrofit.Than
The driver of example valve is the critical component in above-mentioned high oil pressure proportion speed regulator, and most of producer selects the product of import, at
This is very high, and procurement cycle is long, and since it is not specially to be designed for hydrogovernor field, so tool in use
There is significant limitation, such as encounter particular/special requirement, then needs to increase additional hardware to meet requirement, so as to cause hardware
Cost is higher, and can not be connected the output (0~10V, -10V~10V, 4~20mA) of mainstream PLC products well, does not also have
There is the operating mode in view of power station complexity, control power supply and proportioning valve driving power are not effectively isolated.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, a kind of reasonable design, at low cost and applicable is proposed
New Type Proportional valve-driving circuit in extensive range.
The utility model solves its technical problem and following technical scheme is taken to realize：
A kind of New Type Proportional valve-driving circuit, including signal acquisition circuit, signal compensation circuit, signal isolation drive amplification
Circuit, triangle wave generating circuit, voltage reference circuit and anti-reverse power connection circuit；The signal acquisition circuit connects input signal
And voltage reference circuit, the signal acquisition circuit output connection signal compensation circuit, signal compensation circuit output end connection
Signal isolation drive amplification circuit, the signal isolation drive amplification circuit include be opened to signal isolation drive amplification circuit and close to
Signal isolation drive amplification circuit, the triangle wave generating circuit output end connection are opened to signal isolation drive amplification circuit and pass
To signal isolation drive amplification circuit, from being opened to signal isolation drive amplification circuit and closing to signal isolation drive amplification circuit point
Not Shu Chu ON signal and OFF signal be used for drive control；The anti-reverse power connection circuit is connected realization with external power supply to outside
The defencive function of plant-grid connection driving circuit.
The input signal of signal acquisition circuit connection is：Voltage is 0~10VDC or -10~+10VDC, electric current 0/
4~20mA；Output signal is -10~+10VDC.
The signal acquisition circuit includes add circuit and three switches, and input signal connects ground resistance through first switch
It carries out current and voltage signals conversion and exports to add circuit, input signal connects second switch simultaneously, and the add circuit is defeated
Go out to connect third switch, the switch control switched by second switch and third by 0~10VDC and -10~+10VDC outputs for -
10~+10VDC signals.
The signal compensation circuit includes positive voltage signal compensation circuit and negative voltage signal compensation circuit, positive voltage signal
Compensation circuit and negative voltage signal compensation circuit are connected with -10~10V voltage signals that signal acquisition circuit exports, and respectively
The positive voltage signal and negative voltage signal of input are compensated.
It is described to be opened to signal isolation drive amplification circuit and be connected with the positive voltage signal that signal compensation circuit exports, it will just
Voltage signal is overlapped the WAVE voltages exported afterwards with triangle wave circuit and relatively obtains PWM voltage signals, the PWM voltage signals
It is opened to ratio valve coil through optocoupler, Islington pipe output driving；It is described to close to signal isolation drive amplification circuit and signal compensation electricity
The negative voltage signal of road output is connected, and the WAVE voltages after negative voltage signal is superimposed with triangle wave circuit output relatively obtain
PWM voltage signals, the PWM voltage signals are closed through optocoupler, Islington pipe output driving to ratio valve coil.
The advantages of the utility model and good effect are：
1, the following signal of sampling can be isolated in the signal acquisition circuit of the utility model：0~10VDC, -10~+10VDC,
0/4~20mA also can directly receive PLC high-speed port pwm signals, and therefore, input signal is adaptable.
2, the utility model is directed to the defect that conventional proportional valve drive module power supply is not isolated, we are high by two sets of power supplys
Fast optocoupler separates, and avoids ratio valve coil fast conducting, the interference that the high-frequency impulse that cut-off generates generates control system, right
PLC safe operations, the reliable and stable acquisition of analog signals are provided which to ensure, to realize control power supply and proportioning valve driving power
Completely isolated function.
3, the signal isolation drive amplification circuit of the utility model uses PWM pulse modulation technologies, and PWM cycle is adjustable,
It can be applicable in various types of ratio valve coil, adaptability is stronger.
4, the driving such as the driving base value of the proportioning valve switch two-way of the utility model, dead zone, amplification factor parameter can be single
It solely adjusts, regulation performance is superior.
Description of the drawings
Fig. 1 is the principles of the present invention figure；
Fig. 2 is the signal acquisition circuit figure of the utility model；
Fig. 3 is the signal compensation circuit figure of the utility model；
Fig. 4 a are that the utility model is opened to signal isolation drive amplification circuit diagram；
Fig. 4 b are the passes of the utility model to signal isolation drive amplification circuit diagram；
Fig. 5 is the triangle wave generating circuit figure of the utility model；
Fig. 6 is the voltage reference circuit figure of the utility model；
Fig. 7 is the anti-reverse power connection circuit diagram of the utility model.
Specific implementation mode
The utility model embodiment is further described below in conjunction with attached drawing.
A kind of New Type Proportional valve-driving circuit, as shown in Figure 1, including signal acquisition circuit, signal compensation circuit, signal every
From drive amplification circuit, triangle wave generating circuit, voltage reference circuit and anti-reverse power connection circuit.The signal acquisition circuit connects
Input signal (0~10VDC, -10V~10VDC, 4~20mA) and voltage reference circuit are connect, which connects
Signal compensation circuit is connect, the signal compensation circuit output end connection signal isolation drive amplifying circuit, signal isolation driving is put
Big circuit includes being opened to signal isolation drive amplification circuit and closing to signal isolation drive amplification circuit, and electricity occurs for the triangular wave
Output triangular waveform signal in road is given respectively to be opened to signal isolation drive amplification circuit and closes to signal isolation drive amplification circuit, by
It is opened to signal isolation drive amplification circuit and closes export ON signal respectively to signal isolation drive amplification circuit and OFF signal is used for
Drive control.The anti-reverse power connection circuit is connected with external power supply to be realized to the protection work(of external plant-grid connection driving circuit
Energy.The various pieces in driving circuit are illustrated respectively below：
As shown in Fig. 2, signal acquisition circuit structure is：Input signal is linked into the ends IN, and R47 is accurate sampling resistor, will
Current signal is converted into voltage signal.If input signal is -10~10V voltage signals, then S1C is closed, and S1B is opened；Such as input
Signal is 0~10V voltage signals, then S1B is closed, and S1C is opened, and by N1B, the add circuit of N1C compositions is superimposed+a 5V
(Vref) signal simultaneously amplifies twice, becomes -10~10V voltage signals.I.e.：No matter which kind of signal, be transformed by the circuit
- the 10 of standard~10V voltage signals are input to next stage circuit.The characteristics of this Acquisition Circuit is：Input signal is adaptable,
The following signal of sampling can be isolated：0~10VDC, -10~+10VDC, 0/4~20mA also can directly receive PLC high-speed ports PWM
Signal.
As shown in figure 3, the structure of signal compensation circuit is：By signal acquisition circuit output -10~10V voltage signals into
Enter to the circuit centre position.If voltage is that just, and voltage is more than the threshold values (being adjusted by RP2) adjusted of test lead T2, then on
Half portion parallel circuit works, i.e., the circuit output voltage is superimposed a base value (being adjusted by RP6) on the basis of former input voltage, simultaneously
Amplify certain multiple (being adjusted by RP4).If input voltage is that just, and voltage is less than the threshold values adjusted of test lead T2 (by RP2 tune
It is whole), then entire circuit final output is zero.The threshold value that T2 is adjusted can be considered the dead zone of circuit.Similarly, if input voltage is negative
When, then lower half portion circuit works, and principle is same as above.The characteristics of this signal compensation circuit is：The driving base of proportioning valve switch two-way
The driving such as value, dead zone, amplification factor parameter can be adjusted individually, and regulation performance is superior.
As shown in Fig. 4 a and Fig. 4 b, signal isolation drive amplification circuit includes that isolation drive amplifying circuit includes being opened to signal
It isolation drive amplifying circuit and closes to signal isolation drive amplification circuit.By -10~10V voltages letter of signal compensation circuit output
Number enter signal isolation drive amplification circuit.The signal exported such as signal compensation circuit is just, to be then opened to signal isolation driving
Amplifying circuit works, and after positive voltage and T8 voltage superpositions, and show that PWM believes compared with WAVE voltages (triangle wave circuit output)
Number, positive voltage is higher, and PWM duty cycle is bigger, and the proportioning valve driving of the circuit uses PWM pulse modulation technologies, and PWM cycle can
It adjusts.PWM voltage signals are opened to ratio valve coil, this side after BO1A light-coupled isolations, through the driving of Darlington transistor V1 final outputs
Formula realizes control power supply and the completely isolated function of proportioning valve driving power.In figure, VD3 is fly-wheel diode, R52, R53 limits
Flow sampling resistor.Signal as signal compensation circuit exports is negative, then closes and work to signal isolation drive amplification circuit, structure
It is same as above with operation principle.
As shown in figure 5, triangle wave generating circuit can be finely adjusted triangular wave frequency using RP7, waveform is defeated by the ends WAVE
Go out.This circuit coordinates with signal isolation drive amplification circuit, realizes PWM pulsewidth modulations and PWM cycle adjustable function.
As shown in fig. 6, reference voltage is adjusted by adjusting RP1 in voltage reference circuit.
As shown in fig. 7, anti-reverse power connection circuit can prevent input power reversed using diode VD5, VD6, VD7.
It is emphasized that embodiment described in the utility model is illustrative, without being restrictive, therefore this reality
It is every according to the present utility model by those skilled in the art with the novel embodiment being not limited to described in specific implementation mode
The other embodiment that technical solution obtains also belongs to the range of the utility model protection.
Claims (5)
1. a kind of New Type Proportional valve-driving circuit, it is characterised in that：Including signal acquisition circuit, signal compensation circuit, signal every
From drive amplification circuit, triangle wave generating circuit, voltage reference circuit and anti-reverse power connection circuit；The signal acquisition circuit connects
Input signal and voltage reference circuit are connect, the signal acquisition circuit output connection signal compensation circuit, the signal compensation circuit
Output end connection signal isolation drive amplifying circuit, the signal isolation drive amplification circuit include being opened to signal isolation drive amplification
It circuit and closes to signal isolation drive amplification circuit, the triangle wave generating circuit output end connection is opened to signal isolation driving and puts
It big circuit and closes to signal isolation drive amplification circuit, is driven from being opened to signal isolation drive amplification circuit and closing to signal isolation
Amplifying circuit exports ON signal respectively and OFF signal is used for drive control；The anti-reverse power connection circuit is connected with external power supply
Realize the defencive function to external plant-grid connection driving circuit.
2. a kind of New Type Proportional valve-driving circuit according to claim 1, it is characterised in that：The signal acquisition circuit connects
The input signal connect is：Voltage is 0~10VDC or -10~+10VDC, and electric current is 0/4~20mA；Output signal be -10~+
10VDC。
3. a kind of New Type Proportional valve-driving circuit according to claim 2, it is characterised in that：The signal acquisition circuit packet
Add circuit and three switches are included, input signal carries out current and voltage signals conversion through first switch connection ground resistance and exports
To add circuit, input signal connects second switch simultaneously, and the add circuit output connection third switch passes through second switch
It is -10~+10VDC signals that switch control with third switch, which exports 0~10VDC and -10~+10VDC,.
4. a kind of New Type Proportional valve-driving circuit according to claim 2, it is characterised in that：The signal compensation circuit packet
Include positive voltage signal compensation circuit and negative voltage signal compensation circuit, positive voltage signal compensation circuit and negative voltage signal compensation electricity
Road is connected with -10~10V voltage signals that signal acquisition circuit exports, and respectively to the positive voltage signal of input and negative voltage
Signal compensates.
5. a kind of New Type Proportional valve-driving circuit according to claim 2, it is characterised in that：It is described to be opened to signal isolation drive
Dynamic amplifying circuit is connected with the positive voltage signal that signal compensation circuit exports, and positive voltage signal is overlapped rear and triangular wave
The WAVE voltages of circuit output relatively obtain PWM voltage signals, which is opened to through optocoupler, Islington pipe output driving
Ratio valve coil；Described close to signal isolation drive amplification circuit is connected with the negative voltage signal that signal compensation circuit exports,
WAVE voltages after negative voltage signal is superimposed with triangle wave circuit output relatively obtain PWM voltage signals, the PWM voltage signals
It is closed to ratio valve coil through optocoupler, Islington pipe output driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721697248.3U CN207673927U (en) | 2017-12-08 | 2017-12-08 | A kind of New Type Proportional valve-driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721697248.3U CN207673927U (en) | 2017-12-08 | 2017-12-08 | A kind of New Type Proportional valve-driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207673927U true CN207673927U (en) | 2018-07-31 |
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ID=62968720
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721697248.3U Active CN207673927U (en) | 2017-12-08 | 2017-12-08 | A kind of New Type Proportional valve-driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005532A (en) * | 2019-03-18 | 2019-07-12 | 哈尔滨工程大学 | A kind of driving circuit of diesel engine position control formula actuator |
-
2017
- 2017-12-08 CN CN201721697248.3U patent/CN207673927U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005532A (en) * | 2019-03-18 | 2019-07-12 | 哈尔滨工程大学 | A kind of driving circuit of diesel engine position control formula actuator |
| CN110005532B (en) * | 2019-03-18 | 2021-10-26 | 哈尔滨工程大学 | Driving circuit of diesel engine position control type actuator |
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