CN2440995Y - Intellectual controller for electric valve - Google Patents

Abstract

The utility model relates to an intelligent controller for an electric valve, which comprises a driving device with a worm and a worm wheel and a displacement spacing and positioning sensor. The utility model is characterized in that the displacement spacing and positioning sensor is composed of magnetic steel and a Hall element which are arranged on a worm wheel of a valve; the intelligent controller for electric valve also comprises a simple microcomputer control circuit connected with the output end of the Hall element. When the intelligent controller for electric valve solves the anti-explosion requirement of an electric valve, the utility model also has the characteristics of simple structure, easy installation and debugging, high control accuracy and strong anti-interference ability.

Description

The electric valve intelligent controller

The utility model relates to the intelligent controller of electric valve, be specially adapted at a distance, overlength distance and the electric valve control that requirement of explosion proof is arranged.

Existing electric valve controller all adopts between controller and electric valve, by one 14 core cable transmission the signal of the displacement transducer of a built-up gear and a plurality of qualifying bit switch formation is arranged, and be directly to adopt the mode of the relevant control signal of city's electrical transmission to control.The contact of a plurality of qualifying bit switches is easy to generate spark in action, therefore, it is relatively poor to exist explosion-proof, and sensing arrangement complexity, control accuracy are not high, problems such as Installation and Debugging complexity.

The purpose of this utility model provides a kind of intelligent controller of electric valve, it when solving the electric valve requirement of explosion proof, also have simple in structure, the easy and control accuracy height of Installation and Debugging, the characteristics that antijamming capability is strong.

The purpose of this utility model is to realize like this.A kind of electric valve intelligent controller, it comprises: the drive unit, the offset qualification level sensor that have worm and worm gear, it is characterized in that described offset qualification level sensor is that magnet steel and the Hall element that is located on the valve worm gear constitutes, and also comprises the controlled by single chip microprocessor circuit that is connected with Hall element output in this controller.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1: the installation schematic diagram of the drive unit of electric valve and offset qualification level sensor.

Fig. 2: the Hall element electrical schematic diagram in the offset qualification level sensor of the present utility model.

Fig. 3: the output waveform figure of the described sensor of Fig. 2.

Fig. 4: the utility model controller system hardware electrical schematic diagram.

Fig. 5: the programmed logic block diagram that the utility model is related.

The unlatching of electric valve as shown in Figure 1 and closure are to drive worm screw 3 drive valve worm gears 4 by motor, reduction gear 2 to carry out along the track shown in w1, the w2.Therefore, valve open and closed process in must exist a top dead center and a lower dead center is located shown in Fig. 5,6.By just can realize sensing and control to this detection of 2 to valve work at present shape.

In the technological scheme that the utility model proposed, when the valve full-shut position, fix a little magnet steel in 7 positions shown in the valve worm gear 4, and two Hall elements are set in 5,6 positions, its Hall element adopts switching Hall components, its model can be the versatility element of UGN-3020, UGN-3075, the sensing detection of lower dead center on the formation, and control accuracy can reach ± 0.1mm.

When valve is being opened, in the closing course, the magnet steel 7 on the worm gear is along with the rotation of valve turbine 4, moves along the angular velocity of w1, w2, under the effect of magnet steel magnetic force, realized the sensing of offset qualification position thereby can touch logical 5,6 position sensors respectively.

Accompanying drawing 2 is offset qualification level sensor electrical schematic diagrams.Lower dead center on it, signal have the output terminals A of Hall element shown in Figure 25 to be connected with the A of lead with system hardware electrical schematic diagram 4, thereby realize the transmission of top dead center transducing signal.In like manner, the lower dead center signal has the output terminal B of Hall element shown in Figure 26 to be connected by the B of lead with system hardware electrical schematic diagram 4, thereby realizes the transmission of lower dead center transducing signal.

At electric valve open, in the closing course; as " cross moment " situation appearred; mistake moment cam in the Electric actuator can touch the magnet steel at 8,10 places shown in Figure 1 respectively; thereby trigger the Hall element shown in 9,11; its output has the polarity protection diode to constitute output terminal respectively; Fig. 2 " C " links to each other with " C " shown in the system hardware electrical schematic diagram 4 by transmission line, thereby realizes the protection of " crossing moment ".

Making constant speed according to above-mentioned electric valve under motor driving rotates, therefore, valve is a relative constant from being opened to closed time value, and microprocessor can be realized the relation between this time constant and valve opening is tried to achieve corresponding relation value by corresponding program.Is 5 seconds as certain valve from time of " 0 " degree (full close position is to " 100% " aperture), and so, the microprocessor working procedure just can be realized trying to achieve the respective digital show value between the opening value to this time value and valve.

As previously mentioned, certain valve from " 0 " aperture to " 100% ", full gate needed for 5 seconds, and so, the demonstration relation of establishing aperture was 5 ÷ 100=0.05 seconds, just per 0.05 second time display reply decimal number advances one and has been shown as valve opening 1%, thereby realize the demonstration of digitizing valve opening and closing degree, in like manner, when motor carries out reverse running, when valve was closed, the switching degree show value of per 0.05 second time valve should reduce 1%.

In sum as can be seen, the technical solution of the utility model is to be prerequisite in the mode that does not change existing electric valve transmission device, and offset qualification position method for sensing realizes by changing.Thereby, highly versatile, technology is reliable, can adapt to different bore valves and the different control needs of opening closure.In program, designed a function, degree with fuzzy theory control function, realize installing, debug easy, quick and general, its principle basis is variable of valve opening and closing time set, during Installation and Debugging, only need be arranged on debugging mode, starting electrical machinery makes valve reach an operation of " 100% " aperture from " 0 " degree.This device can deposit the value of establishing in the degree in automatically, thereby realizes disposable debugging and adapt to the valve control of any bore.

Further describe with regard to control system hardware electrical schematic diagram shown in Figure 4 below.

The hardware of this control system connects chip by basic module, display device, the keyboard input output of monolithic micro control system and is constituted.

The minimum system formation of relevant 89C51 repeats no more, and is as follows with regard to relevant hardware particular port and definition supplementary notes.

Reflection valve opening and closing degree result and work at present state are made up of 3 light-emitting diode displays, and wherein " 100 " are standard-sized sheet, and " 000 " is full cut-off.

Adopt the mode of P1 port direct-reading key assignments, have the hardware circuit of simplification and read the key program function, its key number and functional relationship are as follows:

The KD key is " time-out " key, press this key then valve stop closure or openness, click again and then continue closure or openness.

The K1 key definition is " unlatching " key, presses this key, and then valve is opened to " 100% " from current location always.

The K2 key definition is " closure " key, presses this key, and then valve is closed into " 000 " from current location always.

The K3 key definition is " contrary level open " key, and during by this key, the timer precentagewise is made the incremental increase counting gradually, and simultaneously, nixie tube shows current open amount, discharge this key after, motor do positive rotate straight end arriving set open amount.

The K4 key definition is " contrary level is closed " key, and its function is opposite with the K3 key.

The K5 key definition is " metering " key, by behind this key, valve is got back to " 000% " closed state from current state, automatically control to " 100% " opening state again, corresponding conversion is counted and made to program to its time value of opening with " 000% " to " 100% ", and deposit in the storage as this valve opening, closed parameter, thereby realize inspection system requirement to various types of valves establishing time value.

The central microprocessor D of electrical schematic diagram is 89C51 as shown in Figure 4, comes the controlling and driving motor to do the operation of unlatching or throttle down by P2.4, the zero clearing of P2.5 port or set.Illustrate below.

When P2.4 output high level, by driven in phase device output high level, make photo coupler Q3 obtain input control voltage, trigger photo coupler Q3 conducting attracting electric relay J1, realize the operation of Open valve.

When P2.5 output high level, make photo coupler Q4 obtain triggering by driven in phase device output high level, photo coupler Q4 conducting attracting electric relay J2 realizes the operation of throttle down.

After relay J 1 adhesive, motor is positive to rotate, Open valve is during to fully open position, the magnet steel 7 that is arranged on the valve worm gear and is is along with the corresponding points with TDCS TDC Sensor Hall element 5 of only moving of valve worm gear, thereby triggering and conducting Hall element output high level is transported to the B end of photo coupler Q2 by signal-transmitting cable, making the driven in phase device put the P2.7 port is the high level microprocessor, and the instruction of closing control motor takes place D1, thereby realizes the unlatching of valve.In like manner, when the motor backward rotation, throttle down is during to full close position, be arranged on magnet steel 7 in the valve worm gear along with the rotation of valve worm screw only moves on the corresponding points with corresponding lower dead center sensing Hall element 6, thereby trigger Hall element output high level, pass through signal-transmitting cable, make the controlled voltage of photo coupler Q1, thereby make the conducting of light-coupled isolation end, putting the P2.6 mouth by the driven in phase device is high level, at this moment, the instruction of microprocessor generation closing control motor, thus realized closing of valve.

When " crossing moment " state appears in valve; " crossing moment " cam in the Electric actuator can touch 8,10 liang of magnet steel of locating shown in Figure 1 respectively; thereby make D end shown in Figure 2 be high level; make the Q5 optocoupler conducting in Fig. 4 system hardware electrical schematic diagram; unconditionally to put P2.4, P2.5 be low level for high level software sends interruption to put the P2.3 mouth; realize the function of disable motor, reach the protection of " crossing moment ".

The control program logic diagram of electric valve intelligent controller of the present utility model has Fig. 5 to draw.

It has initialization respectively, and the display buffer district is determined in the setting of each flag bit and definition, suspends processor, the beginning processor, closed processor is opened processor step by step, closed step by step processor, metering processor, key assignments are handled and are shown that interrupt handling routine constitutes.

Adjective common segment repeats no more.

Claims (3)

1, a kind of electric valve intelligent controller, it comprises: the drive unit, the offset qualification level sensor that have worm and worm gear, it is characterized in that described offset qualification level sensor is that magnet steel and the Hall element that is located on the valve worm gear constitutes, and also comprises the controlled by single chip microprocessor circuit that is connected with Hall element output in this controller.

2, electric valve intelligent controller according to claim 1; it is characterized in that described offset qualification level sensor also has two to be used for magnet steel that force moment protection uses and the Hall element that matches with magnet steel, this Hall element output links to each other with the controlled by single chip microprocessor circuit.

3, electric valve intelligent controller according to claim 1 and 2, what it is characterized in that in the described controlled by single chip microprocessor circuit linking to each other with Hall element output is three photo couplers.

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