CN203431276U - Control system of electric actuating mechanism - Google Patents
Control system of electric actuating mechanism Download PDFInfo
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- CN203431276U CN203431276U CN201320525946.0U CN201320525946U CN203431276U CN 203431276 U CN203431276 U CN 203431276U CN 201320525946 U CN201320525946 U CN 201320525946U CN 203431276 U CN203431276 U CN 203431276U
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- valve position
- control
- signal
- control system
- protective gear
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Abstract
The utility model discloses a control system of an electric actuating mechanism. The control system comprises a valve position controller and a valve position control relay, and the valve position controller is used for outputting a valve position control signal to the valve position control relay according to a valve position feedback signal from a valve position feedback device so as to control action of the electric actuating mechanism; the system further comprises a valve position protection device, the valve position controller is connected with the valve position control relay through the valve position protection device, the valve position controller is further used for judging whether the electric actuating mechanism has a fault or not and outputting a valve position protection device staring signal when it is judged that the electric actuating mechanism has a fault according to at least one of the valve position feedback changing rate, the current valve position feedback signal and difference between the current valve position feedback signal and the valve position control signal, and the valve position protection device is used for cutting off the valve position control signal according to the valve position protection device staring signal. Thus, action of the electric actuating mechanism is forbidden when a fault is found out.
Description
Technical field
The utility model relates to automation field, particularly, relates to a kind of control system of electric actuator.
Background technique
For example, in industry automatic control (automatic Control Systems of Thermal Power Plant), general servoamplifier (being divided into built-in and external) and the valve position feedback device (for example electric pneumatic converter of electric actuator) of using controlled automatically to the aperture of electric actuator, wherein servoamplifier in the future self-controller (or regulator, process control machine etc.) control of valve position instruction with from the valve position feedback of valve position feedback device, carry out deviation ratio, and according to comparative result, regulate the aperture (for example, open the door or close the door) of electric actuator.
Yet, when valve position feedback plant failure, because valve position feedback can not represent physical location or the action of actuator, can cause servoamplifier cannot eliminate the deviation of control command and valve position feedback, thereby cause actuator's standard-sized sheet or complete shut-down, control procedure is out of control, there is security incident.
Model utility content
For the above-mentioned problems in the prior art, the utility model provides a kind of control system of electric actuator, and this control system can judge fault of electric actuator and when fault of electric actuator, disconnect control of valve position to guarantee safety.
The control system that the utility model provides comprises valve positioner and control of valve position relay, for arriving control of valve position relay according to the valve position feedback signal output valve position control signal from valve position feedback device, to control the action of electric actuator, this control system also comprises: valve position protective gear, described valve positioner is connected with described control of valve position relay by described valve position protective gear, described valve positioner is also for judging according to following at least one whether electric actuator breaks down, and export valve position protective gear actuating signal while breaking down at judgement electric actuator: valve position feedback rate of change, current valve position feedback signal, and current valve position feedback signal and the difference between control of valve position signal, described valve position protective gear is for disconnecting described control of valve position signal according to valve position protective gear actuating signal.
Preferably, described valve position feedback rate of change is determined according to the valve position feedback signal gathering in the unit time by described valve positioner.
Preferably, at least one the situation of described valve positioner in the following actuator that judges breaks down: determined valve position feedback rate of change is greater than set rate, current valve position feedback signal and surpasses prespecified range and current valve position feedback signal and the difference between control of valve position signal and be greater than predetermined value.
Preferably, described valve positioner is the valve positioner in distributed control system.
Preferably, described valve positioner is also for export valve position protective gear shutdown signal when receiving reset instruction, and described valve position protective gear is also for connecting described control of valve position signal according to described valve position protective gear shutdown signal.
Preferably, this control system also comprises warning device, and this warning device is connected with described valve positioner, for carrying out actuation of an alarm according to the described valve position protective gear actuating signal from described valve positioner.
Preferably, described valve position protective gear is relay.
Preferably, the quantity of described valve position protective gear is corresponding with the quantity of described control of valve position relay.
The control system of the electric actuator that employing the utility model provides; this control system comprises valve position protective gear; valve positioner can disconnect control of valve position by starting valve position protective gear while breaking down at judgement electric actuator, thereby finds fault in time, on-call maintenance, the Security that improved control procedure.And; valve positioner in this control system can judge fault of electric actuator according to valve position feedback rate of change, current valve position feedback signal and current valve position feedback signal and any one in the difference between control of valve position signal; as long as there is in above-mentioned three conditions one to meet and can start valve position protection, Security is higher.
Other feature and advantage of the present utility model partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the control system of the electric actuator of a kind of mode of execution of the present utility model; And
Fig. 2 is according to the schematic diagram of the control system of the electric actuator of another kind of mode of execution of the present utility model.
Description of reference numerals
100 valve positioner 200 control of valve position relay 300 valve position protective gears
400 valve position feedback device 500 warning devices
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
Fig. 1 is according to the schematic diagram of the control system of the electric actuator of a kind of mode of execution of the present utility model.As shown in Figure 1, this control system comprises valve positioner 100 and control of valve position relay 200, for arriving control of valve position relay 200 according to the valve position feedback signal output valve position control signal from valve position feedback device, to control the action of electric actuator.
Specifically, should be understood that, the control system of this electric actuator can also comprise that valve position feedback device 400(is shown in Figure 2), valve position feedback device 400 can be for example the valve position feedback device of any position for detection of electric actuator (valve position), for example it can be mounted in the electric pneumatic converter on electric actuator, by being connected with valve positioner 100 to come to valve positioner 100, transmit valve position feedback signal, its structure and working principle are conventionally known to one of skill in the art.Therefore,, in order not obscure protection domain of the present utility model and theme, at this, be no longer described in detail.
According to a kind of mode of execution of the present utility model, this control system also comprises: valve position protective gear 300, valve positioner 100 is connected with described control of valve position relay 200 by valve position protective gear 300, valve positioner 100 is also for judging according to following at least one whether electric actuator breaks down, and export valve position protective gear actuating signal while breaking down at judgement electric actuator: valve position feedback rate of change, current valve position feedback signal, and current valve position feedback signal and the difference between control of valve position signal, valve position protective gear 300 is for disconnecting described control of valve position signal according to valve position protective gear actuating signal.
By this mode of execution; can realize the real-time judge to valve position feedback fault; and valve positioner 100 is when breaking down according to above-mentioned Rule of judgment judgement electric actuator; by starting valve position protective gear 300, disconnect control of valve position; make the control of valve position signal of output not arrive electric actuator by control of valve position relay 200; thereby electric actuator is failure to actuate (remaining on original position), avoids causing because of electric actuator misoperation the generation of security incident.
According to a kind of mode of execution of the present utility model, valve positioner 100 can judge whether fault of electric actuator according to any one in following three conditions: valve position feedback rate of change, current valve position feedback signal and current valve position feedback signal and the difference between control of valve position signal.When arbitrary condition meets, valve positioner 100 starts valve position protection, and security of system is higher.
Wherein, described valve position rate of change is determined according to the valve position feedback signal gathering in the unit time by valve positioner.For example, valve positioner 100 can the current valve position feedback signal (for example, magnitude of voltage or current value) of Real-time Collection, and for example, determines valve position feedback rate of change according to the valve position feedback signal that in the unit time, (, in 1S) gathers.
According to the technical solution of the utility model, valve positioner 100 is pre-stored has valve position feedback to change set rate, the prespecified range of valve position feedback signal and the predetermined value of valve position feedback signal and control of valve position signal difference, described set rate, prespecified range and predetermined value can be set according to the needs of practical operation and operating experience, or, valve positioner 100 also can receive above-mentioned predefined parameter, such as the artificial input by operator etc., the utility model does not limit this.
When meet in following at least one condition time, there is fault and exported valve position protective gear actuating signal to valve position protective gear 300 in valve positioner 100 judgement electric actuators:
1) determined valve position feedback rate of change is greater than set rate (valve position feedback rate of change is out-of-limit); 2) current valve position feedback signal surpasses prespecified range (the bad value of valve position feedback quality); And 3) current valve position feedback signal and the difference between control of valve position signal are greater than predetermined value (deviation between valve position feedback signal and control of valve position signal transfinites, and variation tendency is contrary).
When valve positioner 100 judgement actuator failure, output valve position protective gear actuating signal, valve position protective gear 300 can (for example disconnect described control of valve position signal according to valve position protective gear actuating signal, valve position protective gear 300 can be relay, normally closed relay for example, be connected in the control loop of control of valve position relay 200 and electric actuator, thereby for disconnect control loop when receiving valve position protective gear actuating signal), so that the control of valve position signal of output can not arrive electric actuator by control of valve position relay 200, thereby make electric actuator be failure to actuate (remaining on original position), avoid causing because of electric actuator misoperation the generation of security incident.
According to a kind of mode of execution of the present utility model, described valve positioner 100 can be the valve positioner in distributed control system (DCS).Utilize distributed control system, can further eliminate the fault of electric actuator that the fault (for example controllable silicon damage) due to servoamplifier causes, also saved cost simultaneously.In addition, also can according to practical operation operating mode, adjust parameters such as dead band and sensitivity, be easy to safeguard and realize.
According to a kind of mode of execution of the present utility model, valve positioner 100 can be exported valve position protective gear shutdown signal when receiving reset instruction, valve position protective gear 300 can also for example, for (connecting described control of valve position signal according to described valve position protective gear shutdown signal, described valve position protective gear 300 can be relay, normally closed relay for example, be connected in the control loop of control of valve position relay 200 and electric actuator, thereby for disconnect control loop when receiving valve position protective gear actuating signal, thereby and closure is connected control loop when receiving valve position protective gear shutdown signal).
Wherein, described reset instruction can be related personnel by the input of operator display screen or press the instruction that corresponding reset button is inputted, or it also can pass through user's hand reset, and the utility model does not limit this.Adopt this mode of execution, (for example fault is got rid of according to actual conditions can to realize user, or in the time of need to carrying out a distant place under failure condition, manually-operable) can again connect control of valve position signal, with the subsequent control operation of electric actuator being carried out need.
Fig. 2 is according to the schematic diagram of the control system of the example electric actuator of another kind of mode of execution of the present utility model.As shown in Figure 2, this system can also comprise warning device 500, can be connected with valve positioner 100, for carrying out actuation of an alarm according to described valve position protective gear actuating signal.
Preferably, this warning device 500 can comprise any suitable device with warning effect such as buzzer, tutorial light, display screen.For example; when warning device 500 receives the valve position protective gear actuating signal from valve positioner 100; it can open tutorial light, buzzer, and/or display screen display font flicker cause and further improve on-the-spot related personnel's attention Security and design hommization more.
Should be understood that, valve position protective gear 300 of the present utility model can be any suitable device that can realize above-mentioned functions.For example, valve position protective gear 300 can be switch.Preferably, described valve position protective gear is relay.And preferably, the quantity of valve position protective gear 300 is corresponding with the quantity of control of valve position relay 200.For example, the control system of this electric actuator can comprise two control of valve position relays 200, is respectively used to carry out open the door action and the action of closing the door, and relay and closed relay open the door.Correspondingly, valve position protective gear 300 can be configured to two, to be respectively used to forbid opening the door action and the action of forbidding closing the door, to prohibit open relay and prohibits and close relay.
In addition, should be understood that, the above-mentioned numerous embodiments of description can independently be used also and can be combined with various combining forms, and those skilled in the art can carry out suitable selection and setting according to actual conditions.
The control system of the electric actuator that employing the utility model provides; this control system comprises valve position protective gear; valve positioner can disconnect control of valve position by starting valve position protective gear while breaking down at judgement electric actuator, thereby finds fault in time, on-call maintenance, the Security that improved control procedure.And; valve positioner in this control system can judge fault of electric actuator according to valve position feedback rate of change, current valve position feedback signal and current valve position feedback signal and any one in the difference between control of valve position signal; as long as there is in above-mentioned three conditions one to meet and can start valve position protection, Security is higher.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, between various mode of execution of the present utility model, also can carry out combination in any, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (8)
1. the control system of an electric actuator, this control system comprises valve positioner and control of valve position relay, for arriving control of valve position relay according to the valve position feedback signal output valve position control signal from valve position feedback device, to control the action of electric actuator
It is characterized in that, this control system also comprises:
Valve position protective gear, described valve positioner is connected with described control of valve position relay by described valve position protective gear, described valve positioner is also for judging according to following at least one whether electric actuator breaks down, and export valve position protective gear actuating signal while breaking down at judgement electric actuator: valve position feedback rate of change, current valve position feedback signal, and current valve position feedback signal and the difference between control of valve position signal, described valve position protective gear is for disconnecting described control of valve position signal according to described valve position protective gear actuating signal.
2. control system according to claim 1, is characterized in that, described valve position feedback rate of change is determined according to the valve position feedback signal gathering in the unit time by described valve positioner.
3. control system according to claim 2, is characterized in that, at least one the situation of described valve positioner in the following actuator that judges breaks down:
Determined valve position feedback rate of change is greater than set rate, current valve position feedback signal and surpasses prespecified range and current valve position feedback signal and the difference between control of valve position signal and be greater than predetermined value.
4. control system according to claim 1, is characterized in that, described valve positioner is the valve positioner in distributed control system.
5. control system according to claim 4; it is characterized in that; described valve positioner is also for export valve position protective gear shutdown signal when receiving reset instruction, and described valve position protective gear is also for connecting described control of valve position signal according to described valve position protective gear shutdown signal.
6. control system according to claim 1; it is characterized in that; this control system also comprises warning device, and this warning device is connected with described valve positioner, for carrying out actuation of an alarm according to the described valve position protective gear actuating signal from described valve positioner.
7. control system according to claim 1, is characterized in that, described valve position protective gear is relay.
8. control system according to claim 7, is characterized in that, the quantity of described valve position protective gear is corresponding with the quantity of described control of valve position relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320525946.0U CN203431276U (en) | 2013-08-27 | 2013-08-27 | Control system of electric actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320525946.0U CN203431276U (en) | 2013-08-27 | 2013-08-27 | Control system of electric actuating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN203431276U true CN203431276U (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320525946.0U Expired - Lifetime CN203431276U (en) | 2013-08-27 | 2013-08-27 | Control system of electric actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203431276U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438259A (en) * | 2013-08-27 | 2013-12-11 | 中国神华能源股份有限公司 | Control system of electric actuating mechanism |
| CN113867237A (en) * | 2021-11-10 | 2021-12-31 | 中国核动力研究设计院 | Control method and control system of electric gate valve and storage medium |
| CN114062770A (en) * | 2021-11-10 | 2022-02-18 | 中国核动力研究设计院 | Inching control method and inching control system of electric gate valve and storage medium |
-
2013
- 2013-08-27 CN CN201320525946.0U patent/CN203431276U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438259A (en) * | 2013-08-27 | 2013-12-11 | 中国神华能源股份有限公司 | Control system of electric actuating mechanism |
| CN113867237A (en) * | 2021-11-10 | 2021-12-31 | 中国核动力研究设计院 | Control method and control system of electric gate valve and storage medium |
| CN114062770A (en) * | 2021-11-10 | 2022-02-18 | 中国核动力研究设计院 | Inching control method and inching control system of electric gate valve and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |