CN2558827Y

CN2558827Y - Adjustable actuating mechanism of regulating valve

Info

Publication number: CN2558827Y
Application number: CN 02271044
Authority: CN
Inventors: 谭德球
Original assignee: Dongguan Feida Electromechanical Matching Equipment Manufacturing Co ltd
Current assignee: Dongguan Feida Electromechanical Matching Equipment Manufacturing Co ltd
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2003-07-02
Anticipated expiration: 2012-06-14

Abstract

The utility model discloses an adjustable actuating mechanism of governing valve, including the executor the voltage input end of opening of executor connects regulating circuit, and this regulating circuit includes comparator, feedback potentiometer, settlement potentiometer and control relay, the regulation pole of feedback potentiometer by motor in the executor drives, and a link of feedback potentiometer is this regulating circuit input, and its another link concatenates with the settlement potentiometer, and the point that should concatenate inserts the comparison signal input of comparator, and the output and the control relay of comparator are connected, and a link of the normally closed contact of control relay is connected with this regulating circuit input, another link of normally closed contact with the voltage input end of opening of executor links to each other. The utility model discloses can realize the valve between 0 ~ 90 infinitely variable control.

Description

The adjustable actuator of modulating valve

Technical field

The utility model relates to a kind of adjustable actuator that is applicable on Smoke prevention, fire prevention, the volume damper.

Background technique

China utility model patent ZL01235872.X discloses a kind of Smoke proofing and fire proofing valve, actuator in the Smoke proofing and fire proofing valve is used to control Smoke prevention, fire prevention, the open and close of volume damper, by automatic fire alarm center control commander, command center provides the voltage of opening or closing by control, by the unlatching of the driven by motor valve in the actuator or close, and control the rotation of motor by position limit switch, make valve opening or close and put in place, because position limit switch can only be by the setting of initial point and terminal point, so the switch angle of valve can only be 0 ° or 90 °.

The model utility content

The purpose of this utility model is to provide a kind of predeterminable angle, can realize the adjustable actuator of the step-less adjustment of valve between 0 °～90 °.

The purpose of this utility model can realize by following technical measures: comprise final controlling element, cut-in voltage input end at described final controlling element connects regulating circuit, this regulating circuit comprises comparator, feedback potentiometer, set potentiometer and control relay, the adjustable lever of feedback potentiometer is by the machine shaft interlock in the described final controlling element, one connecting end of feedback potentiometer is this regulating circuit input end, its another connecting end is connected in series with the setting potentiometer, this serial connection point inserts the comparison signal input end of comparator, the output terminal of comparator is connected with control relay, one connecting end of the normally-closed contact of control relay is connected with this regulating circuit input end, and another connecting end of normally-closed contact links to each other with the cut-in voltage input end of described final controlling element.

Set the opening angle that potentiometer is set valve by regulating, connect cut-in voltage, final controlling element is opened, feedback potentiometer changes resistance by the driven by motor in the final controlling element, change the current potential of comparator comparison signal input end simultaneously, when the current potential with another reference voltage input of comparator equates, comparator no-output then, control relay disconnects, and the motor in the final controlling element stops operating, so by regulating feedback potentiometer, and predeterminable angle, realize the step-less adjustment of valve between 0 °～90 °, make it can arbitrarily angled unlatching in 0 °～90 ° scopes, better must improve the valve opening function.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is the electrical schematic diagram of final controlling element shown in Figure 1.

Specific embodiment

As shown in Figure 1 and Figure 2, present embodiment comprises final controlling element and regulating circuit, and regulating circuit is connected the cut-in voltage input end of final controlling element, and regulating circuit is by comparator AV1, amplifier AV2, feedback potentiometer KP1, setting potentiometer KP2 and control relay J4.On the adjustable lever of feedback potentiometer KP1 gear is installed, the gear engagement on the machine shaft in this gear and the final controlling element, the adjustable lever of feedback potentiometer KP1 is regulated the feedback potentiometer resistance by the driven by motor in the final controlling element to reach like this; The connecting end of feedback potentiometer KP1 is this regulating circuit input end C, the cut-in voltage that this input end C Access Control command center provides, another connecting end of feedback potentiometer KP1 is connected in series with setting potentiometer KP2, the other end ground connection of potentiometer KP2, their serial connection point A inserts the comparison signal input end of comparator AV1, the output terminal of comparator AV1 is connected with control relay J4 through amplifier AV2, the connecting end of the normally-closed contact J4-1 of control relay J4 is connected with this regulating circuit input end C, and another connecting end of normally-closed contact links to each other with the cut-in voltage input end D of final controlling element.

Be in different resistances by regulating setting potentiometer KP2, the number of turns that the adjustable lever of feedback potentiometer KP1 need change different is regulated the resistance of feedback potentiometer KP1, the dividing potential drop of their serial connections point A is equated with the reference potential of comparator AV1, make the comparator no-output, the normally-closed contact J4-1 of control relay disconnects, motor M in the final controlling element stops after also rotating the different time with the different number of turns of the required commentaries on classics of the adjustable lever of feedback potentiometer KP1 like this, make valve opening in different angles, therefore regulate and set the opening angle that potentiometer KP2 can set valve.

Concrete working procedure is: the cut-in voltage of connection+24V, the normally-closed contact J4-1 of the control relay in regulating circuit imports final controlling element to cut-in voltage, in final controlling element, the cut-in voltage of+24V is through the normally-closed contact J1-1 of relay J 1, the normally-closed contact J2-1 of relay J 2, motor M, the normally-closed contact J2-4 of relay J 2 forms the loop, motor is rotated, thereby drive valve rotating opening valve, the adjustable lever that also drives simultaneously feedback potentiometer KP1 rotates, feedback potentiometer is rotated with motor change its resistance, change the current potential that comparator comparison signal input end A is ordered simultaneously, when the current potential with another reference voltage input of comparator equates, comparator no-output then, control relay disconnects, and the motor in the final controlling element stops operating, and valve is parked in by regulating the default angle of feedback potentiometer.0 ° and 90 ° of two extreme angles of additional valves switch are still controlled by the position limit switch in the final controlling element, and the position limit switch in the present embodiment adopts non-contact induction switch, can prolong the working life of final controlling element.

Claims

1, a kind of adjustable actuator of modulating valve, comprise final controlling element, it is characterized in that: the cut-in voltage input end at described final controlling element connects regulating circuit, this regulating circuit comprises comparator, feedback potentiometer, set potentiometer and control relay, the adjustable lever of feedback potentiometer is by the machine shaft interlock in the described final controlling element, one connecting end of feedback potentiometer is this regulating circuit input end, its another connecting end is connected in series with the setting potentiometer, this serial connection point inserts the comparison signal input end of comparator, the output terminal of comparator is connected with control relay, one connecting end of the normally-closed contact of control relay is connected with this regulating circuit input end, and another connecting end of normally-closed contact links to each other with the cut-in voltage input end of described final controlling element.

2, the adjustable actuator of modulating valve according to claim 1, it is characterized in that: the adjustable lever of feedback potentiometer is provided with gear, the gear engagement on the machine shaft in this gear and the final controlling element.

3, the adjustable actuator of modulating valve according to claim 1 is characterized in that: be connected amplifier between the output terminal of described comparator and the control relay.