CN207848548U - A kind of anti-jamming control circuit of Electric Actuator - Google Patents

Abstract

The utility model discloses a kind of anti-jamming control circuits of Electric Actuator comprising motor positive contactor, electrothermal relay, three phase alternating current motor, the first thermal relay normally closed contact, the second thermal relay normally closed contact, rotates forward control unit, reversion control unit, the first rotating forward normally opened contact, first reversion normally opened contact, the time relay, rotated forward torque mechanical switch, inverted torque mechanical switch and cross torque protective relay motor reversal contactor.Advantageous effect：The bite of automatic elimination Electric Actuator is realized, while avoiding operating personnel and frequently going to rotate Electric Actuator manually, reduces the threat to staff's personal safety, it is time saving and energy saving, and improve the working efficiency of Electric Actuator.

Description

A kind of anti-jamming control circuit of Electric Actuator

Technical field：

The utility model is related to a kind of control circuit more particularly to a kind of anti-jamming control circuits of Electric Actuator.

Background technology：

Existing valve mainly realizes its automatic open-close by Electric Actuator control, as shown in Figure 1, Electric Actuator Include mainly three phase alternating current motor 1, worm screw 2, fan-shaped turbine 3, cross torque protection mechanism 4 and handwheel 5, three phase alternating current motor 1 Output shaft and worm screw 2 are coaxially connected, and torque protection mechanism 4 was provided on the output shaft of three phase alternating current motor 1, worm screw 2 One end and the output shaft of three phase alternating current motor 1 are coaxially connected, and the other end of worm screw 2 is provided with handwheel 5, worm screw 2 and fan-shaped turbine 3 Engagement connection；Since dust enters inside Electric Actuator, or due to Electric Actuator self-operating formed regulus and Electric Actuator is set bite occur；The bite of Electric Actuator is largely slight bite at present, it is only necessary to which Electric Actuator is anti- Turn, so that it may to solve bite；So when bite occurs for Electric Actuator, three-phase alternating current will be controlled by crossing torque protection mechanism 4 Motor 1 stops operating, while controlling warning device alarm, then needs to eliminate bite by manually reversing handle 5；But It is to be had the following problems using artificial Electric Actuator bite of eliminating：1, in thermal power plant, most of Electric Actuator is located at height The dangerous place such as empty, high temperature or high pressure, it is frequent to need the artificial bite for eliminating Electric Actuator be to the people of staff Body safety belt carrys out prodigious threat；2 at the same when Electric Actuator occur bite after, can be stopped, waiting personnel repair Multiple, time-consuming and laborious, working efficiency is low.

Utility model content：

The purpose of this utility model is to provide one kind can eliminating bite automatically, and time saving and energy saving Electric Actuator is anti- Bite control circuit.

The utility model is implemented by following technical solution：A kind of anti-jamming control circuit of Electric Actuator comprising electricity The positive contactor of machine, motor reversal contactor, electrothermal relay, three phase alternating current motor, the first thermal relay normally closed contact, the second heat Relay normally closed contact, rotate forward control unit, reversion control unit, first rotate forward normally opened contact, first reversion normally opened contact, when Between relay, rotated forward torque mechanical switch, inverted torque mechanical switch and cross torque protective relay；The motor rotates forward The input terminal of contactor and the motor reversal contactor is connect with three phase mains；The positive contactor of motor and the electricity The output end of machine reversion contactor is connect with the input terminal of the electrothermal relay；The output end of the electrothermal relay and described three The input terminal of phase alternating current generator connects；First thermal relay normally closed contact, the rotating forward control unit and the motor are just The coil of contactor connects to form series loop；Second thermal relay normally closed contact, the reversion control unit and institute The coil for stating motor reversal contactor connects to form series loop；The first rotating forward normally opened contact and first reversion are normally opened It connects to form electrical circuit with the time relay after contact shunt；It is described to rotate forward torque mechanical switch and the reversion exertin Square mechanical switch is electrically connected with the torque protective relay of crossing respectively.

Further, the rotating forward control unit includes the second reversion normally opened contact, time relay normally open contact, rotating forward Button and rotating forward normally-closed contact；It is described second reversion normally opened contact connect with the time relay normally open contact after with it is described just Turn button parallel connection and forms the first parallel circuit；First parallel circuit is connected with the rotating forward normally-closed contact.

Further, the reversion control unit includes the second rotating forward normally opened contact, time relay normally open contact, reversion Button and reversion normally-closed contact；It is described second rotating forward normally opened contact connect with the time relay normally open contact after with it is described instead Turn button parallel connection and forms the second parallel circuit；Second parallel circuit is connected with the reversion normally-closed contact.

The advantages of the utility model：After when rotating forward bite occurs for Electric Actuator, rotated forward torque mechanical switch and closed It closes, crosses the energization of torque protective relay and run so that rotate forward normally-closed contact and open, first rotates forward normally opened contact and the second rotating forward often Contact closure is opened, the time relay is powered and control time relay normally open contact is closed, and three phase alternating current motor starts to invert, instead After turning the regular hour, time relay control time relay normally open contact resets, while the second rotating forward of control normally opened contact, First rotates forward normally opened contact and rotates forward normally-closed contact reset, and three phase alternating current motor rotates forward, and eliminates bite, rotated forward torque machinery and open Shutdown is opened；After bite occurs when Electric Actuator is in reversion, control three phase alternating current motor rotates forward the regular hour, later three-phase Alternating current generator restores to invert again, eliminates bite；The bite of automatic elimination Electric Actuator is realized, while avoiding operating personnel It frequently goes to rotate Electric Actuator manually, reduces the threat to staff's personal safety, it is time saving and energy saving, and improve The working efficiency of Electric Actuator.

Description of the drawings：

Fig. 1 is the structural schematic diagram of existing Electric Actuator.

Fig. 2 is the electrical schematic diagram of the utility model.

Three phase alternating current motor 1, worm screw 2, fan-shaped turbine 3 cross torque protection mechanism 4, and handwheel 5 rotates forward control unit 6, instead Turn control unit 7, rotated forward torque mechanical switch 8, inverted torque mechanical switch 9, crosses torque protective relay 10, first simultaneously Join circuit 11, the second parallel circuit 12, motor positive contactor KM2, motor reversal contactor KM3, electrothermal relay FR, the first heat Relay normally closed contact FR0, the second thermal relay normally closed contact FR1, the first reversion normally opened contact LSR1, the second reversion is normally opened to touch Point LSR2 inverts normally-closed contact LSR3, rotates forward button OPEN, first rotates forward normally opened contact LSF1, and second rotates forward normally opened contact LSF2 rotates forward normally-closed contact LSF3, inverts button CLOSE, time relay TIME, time relay normally open contact T.

Specific implementation mode：

Below in conjunction with attached drawing, by embodiment, the utility model is described in further detail.

As shown in Fig. 2, a kind of anti-jamming control circuit of Electric Actuator comprising the positive contactor KM2 of motor, motor It is normal to invert contactor KM3, electrothermal relay FR, three phase alternating current motor 1, the first thermal relay normally closed contact FR0, the second electrothermal relay Closed contact FR1, control unit 6, the reversion rotating forward normally opened contact of control unit 7, first LSF1, the first reversion normally opened contact are rotated forward LSR1, time relay TIME, torque mechanical switch 8 was rotated forward, torque mechanical switch 9 was inverted and crosses torque protective relay 10；The input terminal of motor positive contactor KM2 and motor reversal contactor KM3 are connect with three phase mains；Motor rotates forward contact The output end of device KM2 and motor reversal contactor KM3 are connect with the input terminal of electrothermal relay FR；The output end of electrothermal relay FR It is connect with the input terminal of three phase alternating current motor 1；First thermal relay normally closed contact FR0, rotating forward control unit 6 and motor are just transferred The coil of tentaculum KM2 connects to form series loop, and when a short circuit occurs, the first thermal relay normally closed contact FR0 is disconnected, and protection is set It is standby；The coil of second thermal relay normally closed contact FR1, reversion control unit 7 and motor reversal contactor KM3 connect to form series connection Circuit, when a short circuit occurs, the second thermal relay normally closed contact FR1 disconnect, and protect equipment；First rotate forward normally opened contact LSF1 with It connects to form electrical circuit with time relay TIME after first reversion normally opened contact LSR1 parallel connections；Rotated forward torque mechanical switch 8 It is electrically connected respectively with torque protective relay 10 excessively with torque mechanical switch 9 was inverted.

Control unit 6 is rotated forward to include the second reversion normally opened contact LSR2, time relay normally open contact T, rotate forward button OPEN and rotating forward normally-closed contact LSF3；Second reversion normally opened contact LSR2 connect with time relay normally open contact T after with rotating forward Button OPEN parallel connections form the first parallel circuit 11；First parallel circuit 11 is connected with normally-closed contact LSF3 is rotated forward.

It includes the second rotating forward normally opened contact LSF2, time relay normally open contact T, reversion button to invert control unit 7 CLOSE and reversion normally-closed contact LSR3；Second rotating forward normally opened contact LSF2 connect with time relay normally open contact T after with reversion Button CLOSE parallel connections form the second parallel circuit 12；Second parallel circuit 12 is connected with reversion normally-closed contact LSR3.

The course of work：During opening valve, the three phase alternating current motor 1 of Electric Actuator is in rotating forward state, just Turn button OPEN, rotating forward normally-closed contact LSF3 and reversion normally-closed contact LSR3 is in closed state, rotates forward torque mechanical switch 8, it inverted torque mechanical switch 9, first and rotates forward normally opened contact LSF1, the second rotating forward normally opened contact LSF2, reversion button CLOSE, the first reversion normally opened contact LSR1, the second reversion normally opened contact LSR2 and time relay normally open contact T are in and disconnect State；When Electric Actuator bite occurs in the process of running, the closure of torque mechanical switch 8 was rotated forward, force moment protection is crossed Relay 10 is powered, and rotates forward normally-closed contact LSF3 and opens, and first, which rotates forward normally opened contact LSF1 and second, rotates forward normally opened contact LSF2 It is closed, after first rotates forward normally opened contact LSF1 closures, the coil of time relay TIME is powered, and time relay TIME is touched Hair, time relay normally open contact T are closed, and motor reversal contactor KM3 obtains electric, and three phase alternating current motor 1 starts to invert, reversion one After the fixed time, time relay TIME power-off, i.e. time relay normally open contact T resets, at the same rotate forward normally-closed contact LSF3, First, which rotates forward normally opened contact LSF1 and second, rotates forward normally opened contact LSF2 resets, rotates forward the disconnection of torque mechanical switch 8, three intersections Galvanic electricity machine 1 restores to rotate forward, and the bite situation of Electric Actuator is eliminated.

During closing valve, the three phase alternating current motor 1 of Electric Actuator is in inverted status, inverts button CLOSE, reversion normally-closed contact LSR3 and rotating forward normally-closed contact LSF3 are in closed state, rotate forward torque mechanical switch 8, reversion It crosses torque mechanical switch 9, rotate forward button OPEN, the first rotating forward normally opened contact LSF1, the second rotating forward normally opened contact LSF2, first instead Turn normally opened contact LSR1, the second reversion normally opened contact LSR2 and time relay normally open contact T is off；It is held when electronic When bite occurs in the process of running in row device, the closure of torque mechanical switch 9 was inverted, torque protective relay 10 is crossed and is powered, It inverts normally-closed contact LSR3 to open, the first reversion normally opened contact LSR1 and the second reversion normally opened contact LSR2 are closed, the first reversion After normally opened contact LSR1 is closed, the coil of time relay TIME is powered, and time relay TIME is triggered, and the time relay is normal Contact T closures are opened, the positive contactor KM2 of motor obtains electric, and three phase alternating current motor 1 starts to rotate forward, after rotating forward the regular hour, the time Relay TIME power-off, i.e. time relay normally open contact T reset, while inverting that normally-closed contact LSR3, the first reversion is normally opened touches The reversion normally opened contacts of point LSR1 and second LSR2 resets, and inverts the disconnection of torque mechanical switch 9, and three phase alternating current motor 1 restores anti- Turn, the bite situation of Electric Actuator is eliminated.

The utility model realizes the bite of automatic elimination Electric Actuator, while avoiding operating personnel and frequently removing hand Turn moves Electric Actuator, reduces the threat to staff's personal safety, time saving and energy saving, and improves Electric Actuator Working efficiency.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection domain within.

Claims (3)

1. a kind of anti-jamming control circuit of Electric Actuator, which is characterized in that it includes the positive contactor of motor, motor reversal Contactor, three phase alternating current motor, the first thermal relay normally closed contact, the second thermal relay normally closed contact, rotates forward control at electrothermal relay Unit processed, the first rotating forward normally opened contact, first reversion normally opened contact, the time relay, rotated forward torque machine at reversion control unit Tool switch inverted torque mechanical switch and crossed torque protective relay；The positive contactor of motor and the motor reversal The input terminal of contactor is connect with three phase mains；The output end of the motor positive contactor and the motor reversal contactor It is connect with the input terminal of the electrothermal relay；The output end of the electrothermal relay and the input terminal of the three phase alternating current motor connect It connects；First thermal relay normally closed contact, the coil series connection shape for rotating forward control unit and the positive contactor of the motor At series loop；The line of second thermal relay normally closed contact, the reversion control unit and the motor reversal contactor Circle series connection forms series loop；It is described first rotate forward normally opened contact with it is described first invert normally opened contact it is in parallel after with the time Relay connects to form electrical circuit；It is described rotated forward torque mechanical switch and it is described inverted torque mechanical switch respectively with it is described Cross the electrical connection of torque protective relay.

2. a kind of anti-jamming control circuit of Electric Actuator according to claim 1, which is characterized in that the rotating forward control Unit processed includes the second reversion normally opened contact, time relay normally open contact, rotates forward button and rotate forward normally-closed contact；Described second The first parallel circuit of formation in parallel with the rotating forward button after reversion normally opened contact is connected with the time relay normally open contact； First parallel circuit is connected with the rotating forward normally-closed contact.

3. a kind of anti-jamming control circuit of Electric Actuator according to claim 1 or 2, which is characterized in that described anti- It includes the second rotating forward normally opened contact, time relay normally open contact, reversion button and reversion normally-closed contact to turn control unit；It is described Second rotating forward normally opened contact is in parallel with the reversion button after connecting with the time relay normally open contact to form the second parallel connection Circuit；Second parallel circuit is connected with the reversion normally-closed contact.