CN117013491A - Conventional electric actuator control signal loss's device of keeping a position - Google Patents
Conventional electric actuator control signal loss's device of keeping a position Download PDFInfo
- Publication number
- CN117013491A CN117013491A CN202310866424.5A CN202310866424A CN117013491A CN 117013491 A CN117013491 A CN 117013491A CN 202310866424 A CN202310866424 A CN 202310866424A CN 117013491 A CN117013491 A CN 117013491A
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- CN
- China
- Prior art keywords
- pid
- signal
- module
- judging
- switching value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 9
- 238000009776 industrial production Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000013587 production medium Substances 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
Abstract
The invention discloses a bit-keeping device for controlling signal loss of a conventional electric actuating mechanism, which comprises a PID signal judging and outputting switching value module, wherein the module is provided with an intermediate relay and a PID signal loss judging module, and the module judges the open circuit or short circuit state of a signal line by collecting 1-5VDC voltage signals on terminal equipment of a PID output line, namely the actuating mechanism; the power supply of the electric actuator is cut off rapidly by collecting the PID control output signal 4-20 mA DC, judging the processed software and hardware facility devices, namely the I/O clamping piece of the PLC, and judging the output switching value of the output switching value module through the PID signal. The valve can be widely applied to the industrial production medium fluid regulation control system to ensure that the valve is kept in a favorable safety state when the industrial production medium fluid regulation control system fails, so that the control of the process production process is not out of control under the extreme condition, and possible safety production accidents are avoided.
Description
Technical Field
The invention relates to a position-keeping device for controlling signal loss of a conventional electric actuating mechanism.
Background
In the production field of a process control loop, an electric valve executing device of some control systems cannot quickly brake a regulating valve to a state unfavorable for safety control under the fault state that PID control signals of an automatic regulating system are lost, and serious production safety accidents can occur under the extreme condition that the opening degree of the valve is maximum or minimum.
The automatic PID regulating system equipment for the aspects of secondary energy recycling of whole plants maintained by energy centers of Xinjiang eight-iron and steel limited responsibility companies of Baowu groups comprises blast furnace blast air volume, pressure control regulation, blast furnace gas pressure release control regulation, coke oven gas pressure release control regulation, converter gas pressure release control regulation, OY furnace gas pressure release control regulation and the like.
In the aspect of mainly solving the balance control of safe operation between secondary energy production and recycling of steel production processes, EMS remote control in a control center is realized, whether the functional precision of a control equipment system is perfect and reliable or not, the production safety of the process devices is directly influenced, and in order to ensure the safe, stable and economic operation of the process production process, the problem of non-conservation of PID control signals is solved, and the danger caused by the result is very high when a conventional electric actuator is adopted, once PID control signals are lost.
Disclosure of Invention
The invention aims to provide a position-keeping device for the control signal loss of a conventional electric actuating mechanism, which can enable the device to be in an original state before the signal loss under the fault state of the PID control signal loss of an automatic regulating system, improve the functional precision of system equipment, and can be widely applied to the situation that the actuating mechanism enables a valve to be in a position-keeping state under a favorable safety state when an industrial production medium fluid regulating control system has such faults, so that the control of the process production process is not out of control under such extreme conditions, and possible safety production accidents are avoided.
The technical scheme adopted by the invention is that the bit-keeping device for controlling signal loss of the conventional electric actuating mechanism comprises a PID signal judging and outputting switching value module, and is characterized in that the module is provided with an intermediate relay and a PID signal loss judging module, and the module judges the open circuit or short circuit state of a signal line by collecting 1-5VDC voltage signals on terminal equipment of the PID output line, namely the actuating mechanism; the power supply of the electric actuator is cut off rapidly by collecting the PID control output signal 4-20 mA DC, judging the processed software and hardware facility devices, namely the I/O clamping piece of the PLC, and judging the output switching value of the output switching value module through the PID signal.
The inventive concept of the device: in the industrial production field, PID real-time control of process parameters such as flow, liquid level, pressure and the like is carried out on pipeline fluid, which is a basic requirement for safe production and process quality control, and is also an important technical means for improving the recycling balance of industrial secondary energy products by real-time monitoring control.
The practical application conditions are as follows: 1. the problem of on-site incomplete function of a large number of original non-intelligent conventional electric adjustment actuating mechanisms is solved, and the equipment function deficiency of the PID system under the condition is perfected. For example: and the OY furnace gas, coke oven gas and the like are discharged to control the valve. 2. Eliminates hidden trouble of industrial production PID continuous control system equipment, and solves the problems of safe, stable and economic operation of production process control. 3. In the production design and manufacture of a conventional electric adjustment actuator, a manufacturer can add such a "position-keeping" function. The invention can be widely applied to industrial production process facilities, a PID regulating system with parameters such as pipeline fluid flow, pressure, liquid level and the like needing continuous control, and the original design of the invention uses a regulating system of a non-intelligent conventional electric actuating mechanism, so that the process pipeline and other process equipment facilities in the production process can be in a parameter control state before the failure state under the failure condition of loss of PID regulating signals, and the process parameters are ensured not to have larger fluctuation so as to influence the safe production. The device can be applied to adjusting valve actuating mechanism manufacturers, and in the production design and manufacture of conventional electric adjusting actuating mechanisms, the 'position-keeping' function is added, so that the product grade is improved. Application prospect: the problem that the existing non-intelligent conventional electric actuating mechanism in engineering design eliminates the potential safety hazard (functional defect) of production equipment after the control valve is out of control under the fault condition that a control signal is lost is solved, and the safety guarantee functions of PID control system equipment such as pipeline fluid flow, pressure, liquid level and the like in the industrial production process are increased and perfected.
Drawings
Fig. 1 is a schematic diagram of a module of a security device according to the present invention.
Description of the embodiments
The utility model provides a conventional electric actuator control signal loss's guarantor bit device, as shown in figure 1, includes PID signal judgement output switching value module, and characterized by that this module has intermediate relay, PID signal loss judgement module, this module judges signal line "open circuit" or "short circuit" state through gathering the terminal equipment of PID output line namely 1-5VDC voltage signal on the actuating mechanism; the power supply of the electric actuator is cut off rapidly by collecting the PID control output signal 4-20 mA DC, judging the processed software and hardware facility devices, namely the I/O clamping piece of the PLC, and judging the output switching value of the output switching value module through the PID signal.
In this schematic diagram 1, the PID signal loss judgment module can effectively judge the "open" or "short" state of the signal line by collecting the 1-5VDC voltage signal on the terminal device (actuator) of the PID output line. The power supply of the electric actuator is rapidly cut off by utilizing the acquisition (PID signal loss judging module) of the PID control output signal of 4-20 mADC, judging the processed software and hardware facility devices (I/O card of PLC) through software and outputting the switching value through the PID signal judging output switching value module. The device can be installed at the terminal of the on-site actuating mechanism and integrated with the terminal, and the 'position-keeping' system can be configured in the PLC cabinet, so that the power supply of the actuating mechanism can be controlled and cut off rapidly.
Claims (1)
1. The utility model provides a conventional electric actuator control signal loses and protects a bit device, includes PID signal judgement output switching value module, characterized by that this module has intermediate relay, PID signal lose judgement module, this module judges signal line "open circuit" or "short circuit" state through gathering the terminal equipment of PID output line namely 1-5VDC voltage signal on the actuating mechanism; the power supply of the electric actuator is cut off rapidly by collecting the PID control output signal 4-20 mA DC, judging the processed software and hardware facility devices, namely the I/O clamping piece of the PLC, and judging the output switching value of the output switching value module through the PID signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310866424.5A CN117013491A (en) | 2023-07-14 | 2023-07-14 | Conventional electric actuator control signal loss's device of keeping a position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310866424.5A CN117013491A (en) | 2023-07-14 | 2023-07-14 | Conventional electric actuator control signal loss's device of keeping a position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117013491A true CN117013491A (en) | 2023-11-07 |
Family
ID=88568315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310866424.5A Pending CN117013491A (en) | 2023-07-14 | 2023-07-14 | Conventional electric actuator control signal loss's device of keeping a position |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117013491A (en) |
-
2023
- 2023-07-14 CN CN202310866424.5A patent/CN117013491A/en active Pending
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