CN113337312A - Pressure control system and method for gas collecting pipe - Google Patents
Pressure control system and method for gas collecting pipe Download PDFInfo
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- CN113337312A CN113337312A CN202110706369.4A CN202110706369A CN113337312A CN 113337312 A CN113337312 A CN 113337312A CN 202110706369 A CN202110706369 A CN 202110706369A CN 113337312 A CN113337312 A CN 113337312A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
Abstract
The invention discloses a pressure control system and method for a gas collecting pipe. This header pressure control system includes: the system comprises a pressure transmitter, an actuating mechanism, a first control system, a second control system, a third control system, a monitoring upper computer and an isolator; the pressure transmitter is used for monitoring the pressure value in the gas collecting pipe and generating a corresponding electric signal; the actuating mechanism is used for directly driving the valve to move so as to adjust the gate position of the valve; the first control system is connected with the pressure transmitter; the second control system is connected with the acquisition unit; the third control system is connected with the pressure transmitter; the monitoring upper computer is used for directly controlling the actuating mechanism according to the input second control signal. The invention realizes different control precision of the actuating mechanism under different state parameters, and achieves the effect of improving the control precision and the system reliability.
Description
Technical Field
The embodiment of the invention relates to an automatic control technology, in particular to a gas collecting pipe pressure control system and a method.
Background
When coal is coked, about 75% of coal is changed into coke, about 25% of coal generates crude gas containing various chemical elements and enters a gas collecting pipe, if the crude gas is not processed in time, the gas collecting pipe is pushed to the top due to overhigh pressure, and the single-hole smoke is generated, so that the environmental protection accident is caused.
Due to the fact that the working conditions of the coke oven are complex and changeable, a gas collecting pipe pressure control system in the prior art often appears, control failure and control lag are caused by the fact that the working conditions are changeable, the control accuracy of the control system is low, and production requirements cannot be met.
Disclosure of Invention
The invention provides a gas collecting pipe pressure control system and a method thereof, which aim to improve the control precision and the system reliability.
In a first aspect, an embodiment of the present invention provides a header pressure control system, including: the system comprises a pressure transmitter, an actuating mechanism, a first control system, a second control system, a third control system, a monitoring upper computer and an isolator; the pressure transmitter is arranged in the gas collecting pipe and used for monitoring the pressure value in the gas collecting pipe and generating a corresponding electric signal; the actuating mechanisms are arranged at the gas collecting pipe valve and used for directly driving the valve to move so as to adjust the gate position of the valve, and the actuating mechanisms correspond to the pressure transmitters one by one; the first control system is connected with the pressure transmitter and comprises an acquisition unit and a control unit, the acquisition unit is used for acquiring the electric signal, analyzing and processing data and further generating a state parameter, and the control unit is used for outputting a first control signal according to the state parameter; the second control system is connected with the acquisition unit and used for controlling the actuating mechanism according to the state parameters, and the frequency of the third control signal output by the second control system is greater than the frequency of the first control signal output by the first control system; the third control system is connected with the pressure transmitter and used for acquiring the electric signal and outputting a fourth control signal according to the electric signal to control the actuating mechanism, the frequency of the electric signal acquired by the third control system is greater than the frequency of the electric signal acquired by the first control system, and the frequency of the fourth control signal output by the third control system is greater than the frequency of the third control signal output by the second control system; the monitoring upper computer is respectively connected with the first control system, the second control system and the third control system, is used for displaying the state parameters and directly controlling the execution mechanism according to an input second control signal, and is also used for switching control signals acting on the execution mechanism according to the state parameters; the isolator set up in between pressure transmitter and the first control module and between pressure transmitter and the third control module, be used for right the signal of telecommunication falls makes an uproar.
Optionally, the first control signal is configured to control the actuator when a change frequency of the state parameter is lower than a first preset frequency and an amplitude of the state parameter is smaller than a first preset value; the third control signal is used for controlling the actuating mechanism when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value; the fourth control signal is used for controlling the actuating mechanism when the change frequency of the state parameter is between a first preset frequency and a second preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value; the second control signal is used for controlling the actuating mechanism when the change frequency of the state parameter is higher than a second preset frequency or the amplitude of the state parameter is larger than a second preset value; the second preset frequency is greater than the first preset frequency, and the second preset value is greater than the first preset value.
Optionally, this gas collecting pipe pressure control system still includes the power, the power with pressure transmitter one-to-one, the power through the switch with pressure transmitter electricity is connected for pressure transmitter power supply.
Optionally, the monitoring upper computer is further configured to control the actuator to keep the same brake position when the control signal is switched.
Optionally, the first control system uses an ale-BRADLEY system software, the second control system uses a thunberg manifold optimization system software, and the third control system is an SUPCON system.
Optionally, the gas collecting tube pressure control system further comprises a touch screen, the touch screen is connected with the monitoring upper computer and the execution mechanism respectively, and the touch screen is used for displaying the state parameters and inputting a fifth control signal to directly control the execution mechanism.
Optionally, the gas collecting tube pressure control system further includes an image collecting module, the image collecting module includes an image collecting unit and an image processing unit, the image collecting module is disposed at the gas collecting tube valve and used for collecting a valve image, and the image processing unit is used for analyzing the valve image, judging the gate position of the valve, and transmitting the valve image and the judgment result to the monitoring upper computer and the touch screen.
Optionally, the fifth control signal has a higher priority for controlling the actuator than the first, second, third and fourth control signals.
In a second aspect, an embodiment of the present invention further provides a method for controlling a pressure of a gas collecting pipe, which is implemented by using any one of the above systems, and the method includes:
the control signals acting on the execution structure are switched according to the state parameters.
Optionally, switching the control signal acting on the execution structure according to the state parameter includes:
when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is smaller than a first preset value, a first control signal controls the actuating mechanism;
when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value, switching a third control signal to control the actuating mechanism;
when the change frequency of the state parameter is between a first preset frequency and a second preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value, switching a fourth control signal to control the actuating mechanism;
and when the change frequency of the state parameter is higher than a second preset frequency and the amplitude of the state parameter is larger than a second preset value, switching a second control signal to directly control the actuating mechanism.
The gas collecting pipe pressure control system and the method provided by the invention are provided with a plurality of pressure transmitters for monitoring the pressure value in the gas collecting pipe, the isolators can reduce noise of an electric signal and reduce the influence of an interference signal on the control precision, the first control system, the second control system and the third control system with different control precisions can generate control signals according to the pressure value in the gas collecting pipe, and the monitoring upper computer can switch the control systems according to state parameters, so that the control precision of an actuating mechanism is different under different state parameters, and the effects of improving the control precision and the system reliability are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a header pressure control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another gas collecting pipe pressure control system provided by the embodiment of the invention;
FIG. 3 is a schematic diagram of a connection relationship between a power supply and a corresponding pressure transmitter according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a further header pressure control system provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a further header pressure control system according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for controlling the pressure of the gas collecting pipe according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the invention provides a pressure control system of a gas collecting pipe. Fig. 1 is a schematic structural diagram of a header pressure control system according to an embodiment of the present invention, and referring to fig. 1, the header pressure control system 100 includes: the gas collecting system comprises pressure transmitters 101, an actuating mechanism 102, a first control system 103, a second control system 104, a third control system 105, a monitoring upper computer 106 and an isolator 107, wherein at least two pressure transmitters 101 are respectively arranged in a gas collecting pipe and used for monitoring the pressure value in the gas collecting pipe and generating corresponding electric signals; the actuating mechanisms 102 are arranged at the gas collecting pipe valve and used for directly driving the valve to move so as to adjust the gate position of the valve, and the actuating mechanisms 102 correspond to the pressure transmitters 101 one by one; the first control system 103 is connected with the pressure transmitter 101, the first control system 103 comprises an acquisition unit and a control unit, the acquisition unit is used for acquiring an electric signal, analyzing and processing data to generate a state parameter, and the control unit is used for outputting a first control signal according to the state parameter; the second control system 104 is connected with the acquisition unit and used for controlling the actuating mechanism 102 according to the state parameters, and the frequency of the third control signal output by the second control system 104 is greater than the frequency of the first control signal output by the first control system 103; the third control system 105 is connected with the pressure transmitter 101 and is used for acquiring an electric signal and outputting a fourth control signal to control the actuating mechanism 102 according to the electric signal, the frequency of the electric signal acquired by the third control system 105 is greater than that of the electric signal acquired by the first control system 103, and the frequency of the fourth control signal output by the third control system 105 is greater than that of the third control signal output by the second control system 104; the monitoring upper computer 106 is respectively connected with the first control system 103, the second control system 104 and the third control system 105, is used for displaying state parameters and directly controlling the execution mechanism 102 according to an input second control signal, and is also used for switching control signals acting on the execution mechanism according to the state parameters; isolators 107 are provided between the pressure transmitter 101 and the first control system 103 and between the pressure transmitter 101 and the third control system 105 for noise reduction of the electrical signals.
The pressure transmitter 101 is a pressure sensing device disposed in the gas collecting pipe, and can detect a pressure value of gas in the gas collecting pipe and generate a corresponding electrical signal. The actuator 102 is a device capable of driving the gas collecting pipe valve to perform gate position adjustment, and the actuator 102 can adjust the gate position of the gas collecting pipe valve according to the first control signal, the second control signal, the third control signal or the fourth control signal. The first control system 103 can collect the electrical signals generated by the pressure transmitter 101 and then perform PID adjustments on the actuator 102 based on the electrical signals to control the valve gate position for each parameter. The collecting unit may collect the electrical signal generated by the pressure transmitter 101, and obtain a state parameter of the pressure transmitter 101 after performing signal processing on the electrical signal, where the state parameter may be a pressure value of the gas collecting pipe. The second control system 104 is connected to the sampling unit of the first control system 103, and can perform PID adjustment on the actuator 102 according to the state parameters generated by the sampling unit to control the gate position of each parameter valve, and the frequency of the third control signal output by the second control system 104 is higher than the frequency of the first control signal output by the first control system 103, so that the accuracy and speed of the adjustment of the actuator 102 by the second control system 104 are higher than the accuracy and speed of the adjustment of the actuator 102 by the first control system 103. The third control system 105 is connected to the pressure transmitter 101 and the actuator 102, and can collect the electrical signal of the pressure transmitter 101, process and analyze the data according to the electrical signal, and obtain a fourth control signal to perform PID control on the actuator 102. The third control system 105 comprises a digital signal input end and output end, an analog signal input end and output end, a CPU, an Ethernet switch, CPU redundancy, power supply 201 redundancy, input and output interface redundancy and network interface redundancy, and if the third control system 105 fails, remote online control replacement can be completed without influencing normal operation of production. The frequency of the electric signal collected by the third control system 105 is greater than the frequency of the electric signal collected by the first control system 103, and the frequency of the fourth control signal output by the third control system 105 is greater than the frequency of the third control signal output by the second control system 104, so the accuracy and speed of the adjustment of the actuator 102 by the third control system 105 are greater than the accuracy and speed of the adjustment of the actuator 102 by the second control system 104. The monitoring upper computer 106 can display the state parameters, the shift-adding personnel can use the monitoring upper computer 106 to input a second control signal, and the monitoring upper computer 106 can directly control the actuating mechanism 102 according to the second control signal. The actuator 102 and the pressure transmitter 101 corresponding to the actuator 102 are arranged in the same gas collecting pipe.
Exemplarily, the pressure transmitter 101 monitors the pressure value in the gas collecting pipe at any time and converts the pressure value into an electrical signal, the acquisition unit of the first control system 103 acquires the electrical signal, the electrical signal passes through the isolator 107 before entering the acquisition unit, the isolator 107 performs noise reduction processing on the electrical signal, then the acquisition unit acquires the electrical signal and performs signal processing and analysis, so as to generate a state parameter, and the control unit generates a first control signal by using the state parameter as a PID control quantity. The second control system 104 is connected with the acquisition unit of the first control system 103 through an industrial ethernet, the state parameter is used as a PID control adjustment to generate a third control signal, and the frequency of the third control signal output by the second control system 104 is greater than the frequency of the first control signal output by the first control system 103, that is, the control accuracy of the third control signal on the execution mechanism 102 is higher than that of the second control signal. The third control system 105 is coupled to the pressure transmitter 101 via an isolator 107 and can collect electrical signals generated by the pressure transmitter 101. The third control system 105 comprises a CPU, the CPU analyzes the signal-processed electrical signal to generate a fourth control signal, the frequency of the electrical signal acquired by the third control system 105 is greater than the frequency of the electrical signal acquired by the first control system 103, the frequency of the fourth control signal output by the third control system 105 is greater than the frequency of the third control signal output by the second control system 104, so the control precision of the fourth control signal is greater than the third control signal and the first control signal. The monitoring upper computer 106 can switch any one of the first control signal, the third control signal and the fourth control signal to control the actuator 102 according to the state parameter.
The embodiment provides a gas collecting pipe pressure control system, be provided with the pressure value in a plurality of pressure transmitter monitoring gas collecting pipes, the isolator can fall the noise to the signal of telecommunication, reduce the influence of interfering signal to control accuracy, the first control system that control accuracy is different, second control system and third control system all can generate control signal according to the pressure value in the gas collecting pipe, the control system can be switched according to state parameter to the control host computer of control, it is different to actuating mechanism's control accuracy under the different state parameter to have realized, the effect that has improved control accuracy and system reliability has been reached.
With continued reference to fig. 1, optionally, the first control signal is configured to control the actuator 102 when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is smaller than a first preset value; the third control signal is used for controlling the actuator 102 when the change frequency of the state parameter is lower than the first preset frequency and the amplitude of the state parameter is between the first preset value and the second preset value; the fourth control signal is used for controlling the actuator 102 when the change frequency of the state parameter is between the first preset frequency and the second preset frequency and the amplitude of the state parameter is between the first preset value and the second preset value; the second control signal is used for controlling the actuating mechanism 102 when the change frequency of the state parameter is higher than a second preset frequency or the amplitude of the state parameter is larger than a second preset value; the second preset frequency is greater than the first preset frequency, and the second preset value is greater than the first preset value.
The state parameter is a pressure value of the gas collecting pipe, and the change frequency of the state parameter refers to the change times of the state parameter in unit time. The change frequency of the state parameter is related to the combustion intensity of the coke oven connected with the gas collecting pipe, the pressure increase frequency of the gas collecting pipe is increased along with the increase of the combustion intensity of the coke oven, the first preset frequency can be 5 times/minute, and the second preset frequency can be 20 times/minute. The amplitude of the state parameter is the amplitude of the pressure value of the gas collecting pipe, if the pressure of the gas collecting pipe exceeds the pressure rating of the gas collecting pipe, a smoking phenomenon will occur to cause an environmental protection accident, the first preset value can be 60% of the pressure rating of the gas collecting pipe, and the second preset value can be 80% of the pressure rating of the gas collecting pipe. The monitoring upper computer 106 is also used for controlling the actuating mechanism 102 to keep the brake position the same when the control signals are switched
Exemplarily, the pressure transmitter 101 monitors the pressure value in the gas collecting pipe at any time and converts the pressure value into an electrical signal, the acquisition unit of the first control system 103 acquires the electrical signal, the electrical signal passes through the isolator 107 before entering the acquisition unit, the isolator 107 performs noise reduction processing on the electrical signal, then the acquisition unit acquires the electrical signal and performs signal processing and analysis, thereby generating a state parameter related to the pressure value of the gas collecting pipe, and the control unit generates a first control signal by using the pressure value of the gas collecting pipe as a PID control adjustment. The second control system 104 is connected with the acquisition unit of the first control system 103 through an industrial ethernet, a pressure value of the gas collecting pipe is used as a PID control adjustment amount to generate a third control signal, and a frequency of the third control signal output by the second control system 104 is greater than a frequency of the first control signal output by the first control system 103, that is, compared with the second control signal, the third control signal has higher control accuracy and higher adjustment speed on the execution mechanism 102. The third control system 105 is coupled to the pressure transmitter 101 via an isolator 107 and can collect electrical signals generated by the pressure transmitter 101. The third control system 105 comprises a CPU, the CPU analyzes the signal-processed electrical signal to generate a fourth control signal, the frequency of the electrical signal acquired by the third control system 105 is greater than the frequency of the electrical signal acquired by the first control system 103, and the frequency of the fourth control signal output by the third control system 105 is greater than the frequency of the third control signal output by the second control system 104, so the control precision and speed of the fourth control signal are greater than the third control signal and the first control signal. The monitoring upper computer 106 switches control signals acting on the execution structure according to the pressure value of the gas collecting pipe: if the change frequency of the pressure value of the gas collecting tube is lower than the first preset frequency and the amplitude of the pressure value of the gas collecting tube is smaller than the first preset value, it indicates that the pressure value of the gas collecting tube does not change fast and the pressure value of the gas collecting tube is far away from the pressure rated value of the gas collecting tube at the moment, and the monitoring upper computer 106 controls the first control signal sent by the first control system 103 to control the execution mechanism 102 at the moment. If the change frequency of the pressure value of the gas collecting pipe is lower than the first preset frequency and the amplitude of the pressure value of the gas collecting pipe is between the first preset value and the second preset value, the change of the pressure value of the gas collecting pipe is not fast and the amplitude of the pressure value of the gas collecting pipe is closer to the rated pressure value of the gas collecting pipe, and at the moment, the monitoring upper computer 106 controls the execution mechanism 102 to be controlled by a third control signal sent by the second control system 104. If the change frequency of the pressure value of the gas collecting pipe is between the first preset frequency and the second preset frequency and the amplitude of the pressure value of the gas collecting pipe is between the first preset value and the second preset value, the fact that the pressure value of the gas collecting pipe changes rapidly and the amplitude of the pressure value of the gas collecting pipe is close to the pressure rated value of the gas collecting pipe is indicated, and the monitoring upper computer 106 controls the executing mechanism 102 to be controlled by a fourth control signal sent by the third control system 105. The change frequency of the pressure value of the gas collecting tube is higher than the second preset frequency, which indicates that the change of the pressure value of the gas collecting tube is too fast at the moment, the amplitude of the pressure value of the gas collecting tube is larger than the second preset frequency, which indicates that the amplitude of the pressure value of the gas collecting tube is very close to the pressure rating of the gas collecting tube, so that environmental accidents are easily caused, the two conditions need to be directly and quickly controlled, and at the moment, the monitoring upper computer 106 controls a second control signal input by an operator on duty through the monitoring upper computer 106 to directly control the executing mechanism 102.
The gas collecting pipe pressure control system provided by the embodiment is provided with the monitoring upper computer which can display the state parameters in the gas collecting pipe at any time, the actuating mechanism is controlled by switching the control signals with different control accuracies and control speeds according to the state parameters, the actuating mechanism is controlled by switching the control signals with higher control accuracies and control speeds under the condition of higher state parameter change rate or higher state parameter amplitude, the control system adopting different accuracies and control speeds under different conditions is realized, the control accuracy is higher, and the system has the effect of reliability.
Fig. 2 is a schematic structural diagram of another manifold pressure control system according to an embodiment of the present invention, fig. 3 is a schematic connection relationship between a power supply and a corresponding pressure transmitter according to an embodiment of the present invention, and referring to fig. 2 and fig. 3, optionally, the manifold pressure control system further includes a power supply 201, the power supply 201 corresponds to the pressure transmitters 101 one by one, and the power supply 201 is electrically connected to the pressure transmitter 101 through a switch for supplying power to the pressure transmitter 101.
Illustratively, with reference to fig. 2, the number of the pressure transmitters 101 and the number of the power supplies 201 may be 4, because in a case where there are a plurality of manifolds in a production site, one pressure transmitter 101 is disposed in each manifold, each pressure transmitter 101 is powered by different power supplies 201 through switches, and when one power supply 201 or one pressure transmitter 101 fails, the switch connected to the failed power supply 201 or the failed pressure transmitter 101 may be turned off, so as to ensure that other normal pressure transmitters 101 normally detect the pressure value in the manifold. The monitoring upper computer 106 can judge whether the pressure transmitters 101 and the power supply 201 are in failure or not and then control the state of the switch according to the judging result, when the monitoring upper computer 106 monitors that one pressure transmitter 101 is in failure, the monitoring upper computer 106 controls the switch connected with the failed pressure transmitter 101 to be switched off, and then the monitoring upper computer 106 directly controls the state of the executing mechanism 102 corresponding to the failed pressure transmitter 101 according to the input second control signal, so that misoperation caused by the failure of the power supply 201 or the failure of the pressure transmitter 101 can be prevented, and the effect of further improving the control precision is achieved.
With reference to fig. 2, optionally, the gas collecting tube pressure control system further includes a touch screen 203 and an image acquisition module 202, the touch screen 203 is connected to the monitoring upper computer 106 and the execution mechanism 102, respectively, and the touch screen 203 is configured to display the state parameters and input a fifth control signal to directly control the execution mechanism 102; the image acquisition module 202 comprises an image acquisition unit and an image processing unit, the image acquisition module 202 is arranged at the gas collecting pipe valve and used for acquiring a valve image, and the image processing unit is used for analyzing the valve image, judging the gate position of the valve and transmitting the valve image and the judgment result to the monitoring upper computer 106 and the touch screen 203.
Illustratively, the touch screen 203 is disposed at a production site where the gas collecting pipe is located, the touch screen 203 displays a valve image, a valve gate position and a state parameter acquired by the image acquisition module 202, a site worker observes the valve image, the valve gate position and the state parameter displayed on the touch screen 203, and inputs a fifth control signal to directly control the execution mechanism 102 by using the touch screen 203 according to the valve image, the valve gate position and the state parameter, the fifth control signal controls the execution mechanism 102 to have a higher priority than the first control signal, the second control signal, the third control signal and the fourth control signal, so that in an emergency situation, for example, when the upper computer fails, the control signal cannot be normally switched, and at this time, the fifth control signal can directly control the execution mechanism 102 to adjust the gate position of the valve.
The gas collecting pipe pressure control system provided by the embodiment is provided with the monitoring upper computer which can display the state parameters in the gas collecting pipe at any time, the execution mechanism is controlled by switching the control signals with different control accuracies and control speeds according to the state parameters, the execution mechanism is controlled by switching the control signals with higher control accuracies and control speeds under the condition of higher state parameter change rate or higher state parameter amplitude, the image acquisition module is arranged for acquiring a valve image and a valve gate position, the production site is provided with the touch screen for displaying the valve image, the valve gate position and the state parameters and inputting a fifth control signal, the control system adopting different accuracies and control speeds under different conditions is realized, the reliability of the system is further improved, and the effect of higher control accuracy is achieved.
Fig. 4 is a schematic structural diagram of a further manifold pressure control system provided in an embodiment of the present invention, fig. 5 is a schematic structural diagram of a further manifold pressure control system provided in an embodiment of the present invention, and referring to fig. 4, alternatively, the first control system 103 uses ale-BRADLEY system software, the second control system 104 uses thunberg manifold optimization system software, and the third control system 105 is a SUPCON system.
For example, fig. 5 is a schematic structural diagram of another gas manifold pressure control system provided in an embodiment of the present invention, and referring to fig. 5, the ale-BRADLEY system software and the thunberg gas manifold optimization system software may be integrated in a first electrical cabinet a, the SUPCON system may be disposed in a second electrical cabinet B, and the electrical cabinets a and B may be respectively disposed with a plurality of monitoring upper computers 106, which are respectively disposed in different monitoring rooms, to increase the reliability of the gas manifold pressure control system.
The embodiment of the invention also provides a pressure control method of the gas collecting pipe. The method is realized by adopting any one of the gas collecting pipe pressure control systems, and comprises the following steps:
the control signals acting on the execution structure are switched according to the state parameters.
The control signal comprises a first control signal, a second control signal, a third control signal or a fourth control signal.
According to the gas collecting pipe pressure control method provided by the embodiment, the control signals with different control accuracies and control speeds can be switched according to the state parameters to control the actuating mechanism, and the control signals with higher control accuracies and control speeds are switched to control the actuating mechanism under the condition that the state parameter change rate is higher or the amplitude of the state parameters is higher, so that a control system with different accuracies and control speeds under different conditions is realized, and the effects of higher control accuracy and higher reliability are achieved.
Fig. 6 is a flowchart of a method for controlling the pressure of the gas collecting pipe according to an embodiment of the present invention. Referring to fig. 6, optionally, switching the control signal acting on the execution structure according to the state parameter includes:
s301, when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is smaller than a first preset value, controlling an actuating mechanism by a first control signal;
s302, when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value, switching a third control signal to control an actuating mechanism;
s303, when the change frequency of the state parameter is between a first preset frequency and a second preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value, switching a fourth control signal to control the actuating mechanism;
s304, when the change frequency of the state parameter is higher than a second preset frequency and the amplitude of the state parameter is larger than a second preset value, switching a second control signal to directly control the actuating mechanism.
The gas collecting pipe pressure control method provided by this embodiment can control the actuator by switching the control signals of different control accuracies and control speeds according to the state parameters, and when the state parameter change rate is high or the amplitude of the state parameter is high, the control signals of higher control accuracy and control speed are switched to control the actuator, so that a control system of different accuracies and control speeds is adopted under different conditions, and the effects of higher control accuracy and higher reliability are achieved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A manifold pressure control system, comprising:
the pressure transmitter is arranged in the gas collecting pipe and used for monitoring the pressure value in the gas collecting pipe and generating a corresponding electric signal;
the actuating mechanism is arranged at the valve of the gas collecting pipe and used for directly driving the valve to move so as to adjust the gate position of the valve, and the actuating mechanisms correspond to the pressure transmitters one by one;
the first control system is connected with the pressure transmitter and comprises an acquisition unit and a control unit, the acquisition unit is used for acquiring the electric signal and analyzing and processing data to generate a state parameter, and the control unit is used for outputting a first control signal according to the state parameter;
the second control system is connected with the acquisition unit and used for controlling the actuating mechanism according to the state parameters, and the frequency of the third control signal output by the second control system is greater than the frequency of the first control signal output by the first control system;
the third control system is connected with the pressure transmitter and used for acquiring the electric signal and outputting a fourth control signal to control the actuating mechanism according to the electric signal, the frequency of the electric signal acquired by the third control system is greater than that of the electric signal acquired by the first control system, and the frequency of the fourth control signal output by the third control system is greater than that of the third control signal output by the second control system;
the monitoring upper computer is respectively connected with the first control system, the second control system and the third control system, is used for displaying the state parameters and directly controlling the execution mechanism according to an input second control signal, and is also used for switching control signals acting on the execution structure according to the state parameters;
the isolator, the isolator set up in pressure transmitter with between the first control module and pressure transmitter with between the third control module, be used for right the signal of telecommunication falls makes an uproar.
2. The manifold pressure control system of claim 1, wherein the first control signal is configured to control the actuator when a frequency of change of the status parameter is below a first predetermined frequency and an amplitude of the status parameter is less than a first predetermined value; the third control signal is used for controlling the actuating mechanism when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value; the fourth control signal is used for controlling the actuating mechanism when the change frequency of the state parameter is between a first preset frequency and a second preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value; the second control signal is used for controlling the actuating mechanism when the change frequency of the state parameter is higher than a second preset frequency or the amplitude of the state parameter is larger than a second preset value; the second preset frequency is greater than the first preset frequency, and the second preset value is greater than the first preset value.
3. The header pressure control system of claim 1, further comprising a power supply, wherein the power supply corresponds to the pressure transmitters one-to-one, and the power supply is electrically connected to the pressure transmitters through a switch for supplying power to the pressure transmitters.
4. The header pressure control system of claim 1, wherein the supervisory host computer is further configured to control the actuator to maintain the gate position the same when the control signal is switched.
5. The manifold pressure control system of claim 1, wherein the first control system uses an ale _ BRADLEY system software, the second control system uses a thunberg manifold optimization system software, and the third control system is a SUPCON system.
6. The gas header pressure control system according to claim 2, further comprising a touch screen, wherein the touch screen is connected to the monitoring upper computer and the actuator, and the touch screen is configured to display the status parameters and input a fifth control signal to directly control the actuator.
7. The gas header pressure control system according to claim 6, further comprising an image acquisition module, wherein the image acquisition module comprises an image acquisition unit and an image processing unit, the image acquisition module is disposed at the gas header valve and used for acquiring a valve image, and the image processing unit is used for analyzing the valve image, judging a gate position of the valve, and transmitting the valve image and a judgment result to the monitoring upper computer and the touch screen.
8. The manifold pressure control system of claim 6, wherein the fifth control signal prioritizes the actuator over the first, second, third, and fourth control signals.
9. A header pressure control method implemented with any one of the systems of claims 1-8, comprising:
the control signals acting on the execution structure are switched according to the state parameters.
10. The header pressure control method of claim 9, wherein switching the control signal to the actuator based on the state parameter comprises:
when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is smaller than a first preset value, a first control signal controls the actuating mechanism;
when the change frequency of the state parameter is lower than a first preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value, switching a third control signal to control the actuating mechanism;
when the change frequency of the state parameter is between a first preset frequency and a second preset frequency and the amplitude of the state parameter is between a first preset value and a second preset value, switching a fourth control signal to control the actuating mechanism;
and when the change frequency of the state parameter is higher than a second preset frequency and the amplitude of the state parameter is larger than a second preset value, switching a second control signal to directly control the actuating mechanism.
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| CN113337312B (en) | 2022-09-02 |
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