CN117472116B - Intelligent material conveying control system - Google Patents
Intelligent material conveying control system Download PDFInfo
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- CN117472116B CN117472116B CN202311800702.3A CN202311800702A CN117472116B CN 117472116 B CN117472116 B CN 117472116B CN 202311800702 A CN202311800702 A CN 202311800702A CN 117472116 B CN117472116 B CN 117472116B
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- 239000011344 liquid material Substances 0.000 claims abstract description 87
- 230000033228 biological regulation Effects 0.000 claims abstract description 54
- 230000001276 controlling effect Effects 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000004458 analytical method Methods 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 7
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- 239000000853 adhesive Substances 0.000 claims description 3
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- 239000000126 substance Substances 0.000 claims description 3
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention belongs to the field of material conveying control, and particularly discloses an intelligent material conveying control system, which comprises the following components: through evenly laying the temperature regulation and control point at pipeline, combine the influence of temperature loss factor to temperature control in the liquid material transportation process, each stage position of accurate control liquid material pipeline all is in suitable temperature range. The actual flow velocity of the pipeline flow valves under the appointed opening is analyzed, the opening regulating and controlling value of each pipeline flow valve is accurately calculated according to the flow demand, and the error influence of the viscous attribute of the liquid material on the opening value of the pipeline flow valves is avoided. Analyzing the main pipeline flow valve regulation demand state and the opening regulation value, analyzing whether the opening of each pipeline corresponding to the regulation valve needs to be regulated back, guaranteeing the balance between the input port flow and the output port flow, simultaneously avoiding the flow valve to be in an opening threshold state for a long time, and further increasing the use effectiveness of the flow valve.
Description
Technical Field
The invention belongs to the field of material conveying control, and relates to an intelligent material conveying control system.
Background
In some specific liquid material conveying processes, the temperature of the liquid material needs to be controlled to ensure that the liquid material does not change in quality or generate irreversible chemical reaction in the conveying process, and the stable operation of the liquid material conveying system can be kept by monitoring and controlling the temperature of the pipeline. According to the requirement of liquid material conveying, excessive energy consumption and resource waste can be avoided by controlling the flow of the liquid material through adjusting the opening of the valve, and meanwhile, the fluctuation of system pressure can be reduced by accurately controlling the flow of the liquid material, the conveying efficiency is improved, and the influence on the environment is reduced. Therefore, the pipeline temperature monitoring control and the accurate control of the liquid material flow valve play an important role in the liquid material conveying process.
Through the use of the sensor equipment, the temperature of the pipeline and the material conveying flow can be monitored in real time, and the corresponding regulation and control are carried out according to the deviation of the temperature and the flow demand, but obvious defects exist: (1) The existing temperature regulation and control mode and flow regulation and control mode of the liquid material conveying process are only regulated and controlled according to the surface data monitored by the sensor, and the resistance influence of temperature loss factors and viscosity properties of the liquid material on the flow speed in the liquid material conveying process is ignored. In practice, the liquid material will have temperature loss due to heat transfer factor in the process of transportation, resulting in difference between the measured temperature and the actual temperature, and different resistance will be generated in the process of transportation by the liquid material with different viscosity properties, thereby affecting the flow velocity and flow. Therefore, the adjustment value obtained by directly comparing the data obtained by the sensor measuring tool with the required data can cause the temperature and flow regulation result to lack the accuracy and the supportability.
(2) The existing temperature regulation and control mode only regulates and controls the temperature of the input end and the output end of the pipeline, the pipeline is not subjected to sectional fixed-point control, the temperature can be gradually reduced due to the influences of factors such as heat transfer efficiency, pipeline length and the like in the liquid material conveying process, and if only the temperature regulation and control of the integral input end and the integral output end is concerned, the temperature of each section cannot be accurately controlled, and the accumulated error of the temperature in the whole pipeline can be possibly caused to be larger.
(3) The existing flow adjustment analysis content is only regulated and controlled according to the opening degree of the flow valve at the position of the output port of the liquid material, the influence of the flow of each output port on the flow of the input port is not comprehensively considered, and further the callback setting of the flow valve of the input port is omitted, so that the balance between the flow of the input port and the flow of each output port is lacking.
Disclosure of Invention
In view of this, in order to solve the problems set forth in the above background art, an intelligent material conveying control system is proposed.
The aim of the invention can be achieved by the following technical scheme: the invention provides an intelligent material conveying control system, which comprises: the conveying pipeline dividing module is used for acquiring a main pipeline and each auxiliary pipeline of the liquid material conveying pipeline, uniformly dividing the main pipeline of the liquid material conveying pipeline to obtain each pipeline subsection, taking the center point position of each pipeline subsection as each placement point position, and further arranging temperature induction heating equipment at each placement point position.
The temperature change trend analysis module is used for acquiring the storage temperature of the liquid material, monitoring the actual temperature of each placement point in real time, analyzing the staged temperature change rule of each placement point, and counting each undetermined placement point needing to be subjected to temperature regulation and control.
The temperature deviation evaluation module is used for acquiring the allowable loss temperature of the adjacent pipeline subsections, analyzing the temperature deviation influence coefficient of each pending placement point and accordingly obtaining the final adjustment temperature of each pending placement point.
The flow setting module is used for setting the required flow of each auxiliary pipeline of the liquid material conveying pipeline and obtaining the current opening of the main pipeline flow valve and the current opening of each auxiliary pipeline flow valve.
The flow monitoring module is used for acquiring material properties of liquid materials, calculating actual flow velocity of each auxiliary pipeline flow valve under the current opening according to the material properties, confirming a target pipeline and acquiring a main pipeline flow valve regulation and control demand state, wherein the main pipeline flow valve regulation and control demand state comprises an up-regulation state and a callback state.
The flow valve regulating and controlling module is used for acquiring the opening regulating and controlling value of the flow valve of the target pipeline, analyzing the opening regulating and controlling value of the flow valve of each auxiliary pipeline according to the opening regulating and controlling value of the flow valve of the target pipeline, and acquiring the opening regulating and controlling value of the flow valve of the main pipeline based on the regulating and controlling requirement state of the flow valve of the main pipeline.
In a specific embodiment, the analysis of the stepwise temperature change rule of each placement point is performed by: setting the time length of a set time period, setting each time point in the set time period according to a preset equal time interval principle, extracting the actual temperature of each placement point at each time point in the set time period, and recording as，/>For the placement point number, +.>，/>Numbering for time points, ++>。
Calculating the temperature change index of each placement point in a set time period，Wherein->Adjusting a correction factor for the setting of the temperature change index, < + >>Respectively +.>The actual temperatures of the individual placement points within the set time period correspond to maximum and minimum values, +.>Storing temperature for liquid material, +.>For a set temperature deviation tolerance, +.>Is the number of time points.
Comparing the temperature change index of each placement point in the set time period with the temperature change index set threshold value, whenWhen indicate->The placement points are undetermined placement points with temperature to be regulated and controlled>Setting a threshold value for the temperature change index, thereby obtaining each to-be-regulated temperatureAnd setting a placement point.
In a specific embodiment, the allowable loss temperature calculation mode of the adjacent pipeline subsections is as follows: acquiring the length of a main pipeline of a liquid material conveying pipelineCalculating the allowable loss temperature of adjacent pipeline subsections>Wherein->Indicating the set normal loss temperature per unit pipe length, < >>The number of pipe subsections is divided.
In one embodiment, the analyzing step for analyzing the temperature deviation influence coefficient of each pending placement point includes the following steps: setting the material storage temperature of the liquid material conveying pipeline as the initial end setting temperature of the pipeline。
Obtaining the layout positions of the undetermined placement points, counting the dividing number of the pipeline subsections of the layout positions of the undetermined placement points, and marking asCalculating the predicted temperature of each pending placement point>，/>Numbering the undetermined placement points->。
Obtaining the external environment temperature of the pipelineAnalyzing the temperature deviation influence coefficient of each undetermined placement point>，，/>Is the radius of the main pipeline of the liquid material conveying pipeline, +.>Setting a reference value corresponding to the surface area of the pipeline, +.>Setting a coefficient of temperature influence of the inner wall adhesive substance corresponding to the unit area ratio, wherein e is a natural constant and ++>Is the circumference ratio.
Calculating the average value of the actual temperatures of the undetermined placement points in the set time period to obtain the average value temperature of the undetermined placement pointsEvaluating the normal loss temperature of the corresponding pipeline sub-section of each to-be-positioned placement pointWherein->The set unit temperature deviation coefficient corresponds to the temperature adjustment value.
In a specific embodiment, the final adjustment temperature determining manner of each pending placement point is as follows: the average temperature of each undetermined placement point is differed from the material storage temperature to obtain the preliminary up-regulating temperature of each undetermined placement pointFurther byAs the final adjusted temperature for each pending placement point.
In a specific embodiment, the actual flow velocity of each secondary pipeline flow valve under the current opening degree is calculated by the following corresponding method: installing a flowmeter on the liquid material outlet side of each auxiliary pipeline flow valve, acquiring the actual output flow of each time point of each auxiliary pipeline flow valve position in a set time period through the flowmeter, extracting the actual output flow of each auxiliary pipeline flow valve position in the starting time point and the actual output flow of each auxiliary pipeline flow valve position in the set time period, and respectively recording asFurther by->As the actual output flow of the flow valve position of the respective secondary line in the set time period +.>Numbering the secondary pipeline>。
Extracting density and viscosity of liquid material from material properties of liquid material, respectively recorded asCalculating the speed loss value of the liquid material in the pipeline conveying process>Wherein->Respectively representing the preset reference values of the density and viscosity of the liquid material,/->Indicating the set liquid material attribute coefficient corresponding to the unit flow rate loss value +.>Indicating the corresponding correction ratio of the set speed loss value.
Will beSubstituting the actual flow velocity of each auxiliary pipeline flow valve under the current opening degree into a formulaWherein->Is->And the radius of the secondary pipeline.
In a specific embodiment, the method for identifying the target pipeline and obtaining the regulation and control requirement state of the main pipeline flow valve comprises the following steps: e1, comparing the actual output flow of each auxiliary pipeline flow valve position in a set time period with the required flow of the corresponding auxiliary pipeline flow valve to obtain the regulated flow of each auxiliary pipeline flow valve, and recording as。
E2, ifExtracting the regulating flow with the largest absolute value distance from the difference value of 0 value from the regulating flow of each auxiliary pipeline flow valve, and recording the regulating flow as +.>And the auxiliary pipeline corresponding to the regulated flow is marked as a target pipeline>Indicating that a proposition symbol exists, and the main pipeline flow valve regulation demand state is an up-regulation state at the moment.
E3, ifFlow valve from each secondary pipelineExtracting the regulating flow with the smallest difference from the value 0 from the regulating flow, and marking the regulating flow as +.>And the auxiliary pipeline corresponding to the regulated flow is marked as a target pipeline>And (5) representing any proposition symbol, wherein the regulating and controlling requirement state of the main pipeline flow valve is a callback state.
In a specific embodiment, the method for obtaining the opening regulation value of the flow valve of each auxiliary pipeline is as follows: n1, extracting the target pipeline radius from the sub pipeline radius, and recording asSubstituting the calculation formula +.>Obtaining a target pipeline flow valve opening regulating value, wherein ∈10>And setting an opening regulating value for the flow valve at a unit regulating speed.
N2, the current opening of the flow valve of the extraction target pipeline and the opening threshold value of the flow valve are respectively recorded as、/>If (if)Will->And correspondingly regulating and controlling the opening of the flow valve of the target pipeline as a regulating and controlling value of the opening of the flow valve of the target pipeline, otherwise, regulating the opening of the flow valve of the target pipeline to the opening threshold value of the flow valve.
And N3, correspondingly regulating and controlling the opening of the corresponding flow valves of all the other auxiliary pipelines except the target pipeline in a corresponding regulation and control mode of the opening regulating and controlling value of the flow valve of the target pipeline.
In a specific embodiment, the main pipeline flow valve opening regulation value obtaining mode is as follows: z1, when the regulation demand state of the main pipeline flow valve is in an up-regulation state, acquiring the opening before regulating the target pipeline flow valve and marking asAnd extracting the actual flow rate of the target pipeline flow valve under the opening degree before adjustment>Obtaining the actual flow rate of the target pipeline flow valve under the opening threshold value +.>The same way obtains the target pipeline flow valve at +.>Actual flow rate +.>According to the formula->Obtaining the flow rate compensation value of the main pipeline, and then obtaining the flow rate compensation value by +.>And obtaining the opening regulating value of the main pipeline flow valve.
Z2, acquiring the opening of the main pipeline after the flow valve is regulated, comparing the opening with the opening threshold of the flow valve, and if the opening is larger than the opening threshold of the flow valve, determining an analysis formulaObtaining the callback opening degree of each auxiliary pipeline flow valve, and further adjusting the opening degree of each auxiliary pipeline flow valve according to +.>And (5) performing corresponding regulation and control.
Z3, when the main pipeline flow valve regulation demand state is returnWhen the state is adjusted, the deficient flow velocity of the flow valve of the target pipeline is calculatedAdding the compensation flow rate with the speed loss value of the liquid material in the pipeline conveying process to obtain the compensation flow rate of the main pipeline flow valve>Obtaining the opening regulating value of the main pipeline flow valve according to the opening regulating value>。
Compared with the prior art, the invention has the following beneficial effects: (1) According to the invention, the temperature regulation points are uniformly distributed on the conveying pipeline, and the temperature control effect of temperature loss factors in the liquid material conveying process is combined, so that the positions of all stages of the liquid material conveying pipeline are accurately controlled within a proper temperature range, the state stability of the liquid material in the conveying process is ensured, and the conveying quality and the conveying efficiency of the liquid material are improved.
(2) According to the invention, the actual flow velocity of the pipeline flow valve under the specified opening degree is analyzed, and then the opening degree regulating and controlling value of each pipeline flow valve is accurately calculated according to the flow demand, so that the defect that the regulating and controlling result lacks accuracy and support performance due to the resistance influence of the viscosity attribute of the liquid material in the pipeline flow valve opening degree value is avoided, and the pipeline system is ensured to stably and efficiently operate so as to meet the expected flow demand.
(3) According to the invention, based on the opening regulation and control values of the flow valves of the auxiliary pipelines, the regulation and control demand state and the opening regulation and control values of the flow valves of the main pipeline are analyzed, when the opening of the flow valves of the auxiliary pipelines cannot meet the flow demand, the opening of the flow valves of the main pipeline is evaluated, and when the current states of the flow valves of the auxiliary pipelines and the main pipeline are not required to be regulated upwards, whether the opening of the corresponding regulation valves of the pipelines need to be regulated upwards is analyzed, so that the balance between the flow of an input port and the flow of each output port is ensured, and meanwhile, the flow valves are prevented from being in an opening threshold state for a long time, thereby improving the use effectiveness of the flow valves.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the system module connection of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides an intelligent material conveying control system, which includes: the system comprises a conveying pipeline dividing module, a temperature change trend analysis module, a temperature deviation evaluation module, a flow setting module, a flow monitoring module and a flow valve regulating and controlling module. The conveying pipeline dividing module is respectively connected with the temperature change trend analysis module and the flow setting module, the temperature change trend analysis module is connected with the temperature deviation evaluation module, the flow setting module is connected with the flow monitoring module, and the flow monitoring module is connected with the flow valve regulating and controlling module.
The conveying pipeline dividing module is used for acquiring a main pipeline and each auxiliary pipeline of the liquid material conveying pipeline, uniformly dividing the main pipeline of the liquid material conveying pipeline to obtain each pipeline subsection, taking the center point position of each pipeline subsection as each placement point position, and further arranging temperature induction heating equipment at each placement point position.
It should be noted that, according to the main pipeline uniform dividing mode and the analysis temperature control mode of the liquid material conveying pipeline, the auxiliary pipelines of the liquid material conveying pipeline are uniformly divided in the same way, and the temperature control analysis is performed on the divided sub-sections of the auxiliary pipelines of the liquid material conveying pipeline.
The temperature change trend analysis module is used for acquiring the storage temperature of the liquid material, monitoring the actual temperature of each placement point in real time, analyzing the periodic temperature change rule of each placement point, and counting out each undetermined placement point needing to be subjected to temperature regulation.
The liquid material storage temperature is obtained in a pre-storage mode.
In a specific embodiment of the present invention, the analysis of the periodic temperature change rule of each placement point is performed by: setting the time length of a set time period, setting each time point in the set time period according to a preset equal time interval principle, extracting the actual temperature of each placement point at each time point in the set time period, and recording as，/>For the placement point number, +.>，/>Numbering for time points, ++>。
Calculating the temperature change index of each placement point in a set time period，Wherein->Adjusting a correction factor for the setting of the temperature change index, < + >>Respectively are provided withIs->The actual temperatures of the individual placement points within the set time period correspond to maximum and minimum values, +.>Storing temperature for liquid material, +.>For a set temperature deviation tolerance, +.>Is the number of time points.
Comparing the temperature change index of each placement point in the set time period with the temperature change index set threshold value, whenWhen indicate->The placement points are undetermined placement points with temperature to be regulated and controlled>And setting a threshold value for the temperature change index, and accordingly obtaining each undetermined placement point required to be subjected to temperature regulation.
The temperature deviation evaluation module is used for acquiring the allowable loss temperature of the adjacent pipeline subsections, analyzing the temperature deviation influence coefficient of each pending placement point and accordingly obtaining the final adjustment temperature of each pending placement point.
In a specific embodiment of the present invention, the allowable loss temperature calculation method of the adjacent pipe subsections is as follows: acquiring the length of a main pipeline of a liquid material conveying pipelineCalculating the allowable loss temperature of adjacent pipeline subsections>Wherein->Indicating the set normal loss temperature per unit pipe length, < >>For a set unit pipe length, < > for>The number of pipe subsections is divided.
In a specific embodiment of the present invention, the analyzing step for analyzing the temperature deviation influence coefficient of each pending placement point is as follows: setting the material storage temperature of the liquid material conveying pipeline as the initial end setting temperature of the pipeline。
Obtaining the layout positions of the undetermined placement points, counting the dividing number of the pipeline subsections of the layout positions of the undetermined placement points, and marking asCalculating the predicted temperature of each pending placement point>，/>Numbering the undetermined placement points->。
Obtaining the external environment temperature of the pipelineAnalyzing the temperature deviation influence coefficient of each undetermined placement point>，，/>Is the radius of the main pipeline of the liquid material conveying pipeline, +.>Setting a reference value corresponding to the surface area of the pipeline, +.>Setting a coefficient of temperature influence of the inner wall adhesive substance corresponding to the unit area ratio, wherein e is a natural constant and ++>Is the circumference ratio.
The method for obtaining the external environment temperature of the pipeline is as follows: the external environment temperature at each time point in the set time period is monitored in real time through a temperature sensor, and the average value calculation is carried out on the external environment temperature, wherein the obtained external environment average value temperature in the set time period is the external environment temperature of the pipeline. The extraction time of the external environment temperature of the pipeline is the same as the extraction time of the temperature of the placement point.
Calculating the average value of the actual temperatures of the undetermined placement points in the set time period to obtain the average value temperature of the undetermined placement pointsEvaluating the normal loss temperature of the corresponding pipeline sub-section of each to-be-positioned placement pointWherein->The set unit temperature deviation coefficient corresponds to the temperature adjustment value.
In a specific embodiment of the present invention, the final adjustment temperature determining manner of each pending placement point is: the average temperature of each undetermined placement point is differed from the material storage temperature to obtain the preliminary up-regulating temperature of each undetermined placement pointFurther by->As the final adjusted temperature for each pending placement point.
According to the invention, the temperature regulation points are uniformly distributed on the conveying pipeline, and the temperature control effect of temperature loss factors in the liquid material conveying process is combined, so that the positions of all stages of the liquid material conveying pipeline are accurately controlled within a proper temperature range, the state stability of the liquid material in the conveying process is ensured, and the conveying quality and the conveying efficiency of the liquid material are improved.
The flow setting module is used for setting the required flow of each auxiliary pipeline of the liquid material conveying pipeline and obtaining the current opening of the main pipeline flow valve and the current opening of each auxiliary pipeline flow valve.
The flow monitoring module is used for acquiring material properties of liquid materials, calculating actual flow velocity of each auxiliary pipeline flow valve under the current opening degree according to the material properties, confirming a target pipeline and acquiring a main pipeline flow valve regulation and control demand state, wherein the main pipeline flow valve regulation and control demand state comprises an up-regulation state and a callback state.
The material properties of the liquid material are obtained in a pre-storage mode.
In a specific embodiment of the present invention, the actual flow rate of each secondary pipeline flow valve under the current opening degree is calculated by the following corresponding method: installing a flowmeter on the liquid material outlet side of each auxiliary pipeline flow valve, acquiring the actual output flow of each time point of each auxiliary pipeline flow valve position in a set time period through the flowmeter, extracting the actual output flow of each auxiliary pipeline flow valve position in the starting time point and the actual output flow of each auxiliary pipeline flow valve position in the set time period, and respectively recording asFurther by->As the actual output flow of the flow valve position of the respective secondary line in the set time period +.>Numbering the secondary pipeline>。
The actual output flow of each time point of the flow valve position of each auxiliary pipeline in the set time period is the liquid material outlet side monitoring flow of each auxiliary pipeline flow valve.
Extracting density and viscosity of liquid material from material properties of liquid material, respectively recorded asCalculating the speed loss value of the liquid material in the pipeline conveying process>Wherein->Respectively representing the preset reference values of the density and viscosity of the liquid material,/->Indicating the set liquid material attribute coefficient corresponding to the unit flow rate loss value +.>Indicating the corresponding correction ratio of the set speed loss value.
Under normal conditions, the density and viscosity of the liquid material have an obstruction acting force on the conveying speed, when the density or viscosity of the liquid material is higher, the liquid material can be subjected to larger resistance in the conveying process, so that the speed loss is increased, and the density and viscosity of the liquid material are in a direct proportion relation with the speed loss value.
Will beSubstituting the actual flow velocity of each auxiliary pipeline flow valve under the current opening degree into a formulaWherein->Is->And the radius of the secondary pipeline.
The radius of each secondary pipeline is obtained through pre-storage.
In a specific embodiment of the present invention, the method for identifying the target pipeline and obtaining the regulation demand state of the main pipeline flow valve includes: e1, comparing the actual output flow of each auxiliary pipeline flow valve position in a set time period with the required flow of the corresponding auxiliary pipeline flow valve to obtain the regulated flow of each auxiliary pipeline flow valve, and recording as；
E2, ifExtracting the regulating flow with the largest absolute value distance from the difference value of 0 value from the regulating flow of each auxiliary pipeline flow valve, and recording the regulating flow as +.>And the auxiliary pipeline corresponding to the regulated flow is marked as a target pipeline>Indicating that a proposition symbol exists, and at the moment, regulating and controlling a demand state of a main pipeline flow valve to be an up-regulating state;
e3, ifExtracting the regulated flow with the smallest difference from the value 0 from the regulated flows of the flow valves of the auxiliary pipelines, and marking the regulated flow as +.>And the auxiliary pipeline corresponding to the regulated flow is marked as a target pipeline>And (5) representing any proposition symbol, wherein the regulating and controlling requirement state of the main pipeline flow valve is a callback state.
The flow valve regulating and controlling module is used for obtaining the opening regulating and controlling value of the flow valve of the target pipeline, analyzing the opening regulating and controlling value of the flow valve of each auxiliary pipeline according to the opening regulating and controlling value of the flow valve of the target pipeline, and obtaining the opening regulating and controlling value of the flow valve of the main pipeline based on the regulating and controlling requirement state of the flow valve of the main pipeline.
In a specific embodiment of the present invention, the method for obtaining the opening regulation value of the flow valve of each secondary pipeline includes: n1, extracting the target pipeline radius from the sub pipeline radius, and recording asSubstituting the calculation formula +.>Obtaining a target pipeline flow valve opening regulating value, wherein ∈10>And setting an opening regulating value for the flow valve at a unit regulating speed.
N2, the current opening of the flow valve of the extraction target pipeline and the opening threshold value of the flow valve are respectively recorded as、/>If (if)Will->And correspondingly regulating and controlling the opening of the flow valve of the target pipeline as a regulating and controlling value of the opening of the flow valve of the target pipeline, otherwise, regulating the opening of the flow valve of the target pipeline to the opening threshold value of the flow valve.
And N3, correspondingly regulating and controlling the opening of the corresponding flow valves of all the other auxiliary pipelines except the target pipeline in a corresponding regulation and control mode of the opening regulating and controlling value of the flow valve of the target pipeline.
According to the invention, the actual flow velocity of the pipeline flow valve under the specified opening degree is analyzed, and then the opening degree regulating and controlling value of each pipeline flow valve is accurately calculated according to the flow demand, so that the defect that the regulating and controlling result lacks accuracy and support performance due to the resistance influence of the viscosity attribute of the liquid material in the pipeline flow valve opening degree value is avoided, and the pipeline system is ensured to stably and efficiently operate so as to meet the expected flow demand.
In a specific embodiment of the present invention, the main pipeline flow valve opening regulation value obtaining mode is as follows: z1, when the regulation demand state of the main pipeline flow valve is in an up-regulation state, acquiring the opening before regulating the target pipeline flow valve and marking asAnd extracting the actual flow rate of the target pipeline flow valve under the opening degree before adjustment>Obtaining the actual flow rate of the target pipeline flow valve under the opening threshold value +.>The same way obtains the target pipeline flow valve at +.>Actual flow rate +.>According to the formula->Obtaining the flow rate compensation value of the main pipeline, and then obtaining the flow rate compensation value by +.>And obtaining the opening regulating value of the main pipeline flow valve.
The actual flow rate of the target pipeline flow valve before adjustment, namely the target pipeline flow valve isUnder the opening degreeThe actual flow rate, the target pipeline flow valve is +.>The actual flow rate at the opening degree is the actual flow rate +.>Is obtained by extraction.
Z2, acquiring the opening of the main pipeline after the flow valve is regulated, comparing the opening with the opening threshold of the flow valve, and if the opening is larger than the opening threshold of the flow valve, determining an analysis formulaObtaining the callback opening degree of each auxiliary pipeline flow valve, and further adjusting the opening degree of each auxiliary pipeline flow valve according to +.>And (5) performing corresponding regulation and control.
Z3, when the regulation demand state of the main pipeline flow valve is a callback state, calculating the deficient flow velocity of the target pipeline flow valveAdding the compensation flow rate with the speed loss value of the liquid material in the pipeline conveying process to obtain the compensation flow rate of the main pipeline flow valve>Obtaining the opening regulating value of the main pipeline flow valve according to the opening regulating value>。
According to the invention, based on the opening regulation and control values of the flow valves of the auxiliary pipelines, the regulation and control demand state and the opening regulation and control values of the flow valves of the main pipeline are analyzed, when the opening of the flow valves of the auxiliary pipelines cannot meet the flow demand, the opening of the flow valves of the main pipeline is evaluated, and when the current states of the flow valves of the auxiliary pipelines and the main pipeline are not required to be regulated upwards, whether the opening of the corresponding regulation valves of the pipelines need to be regulated upwards is analyzed, so that the balance between the flow of an input port and the flow of each output port is ensured, and meanwhile, the flow valves are prevented from being in an opening threshold state for a long time, thereby improving the use effectiveness of the flow valves.
The foregoing is merely illustrative and explanatory of the principles of this invention, as various modifications and additions may be made to the specific embodiments described, or similar arrangements may be substituted by those skilled in the art, without departing from the principles of this invention or beyond the scope of this invention as defined in the claims.
Claims (2)
1. An intelligent material conveying control system is characterized in that the system comprises:
the conveying pipeline dividing module is used for acquiring a main pipeline and each auxiliary pipeline of the liquid material conveying pipeline, uniformly dividing the main pipeline of the liquid material conveying pipeline to obtain each pipeline subsection, taking the center point position of each pipeline subsection as each placement point position, and further arranging temperature induction heating equipment at each placement point position;
the temperature change trend analysis module is used for acquiring the storage temperature of the liquid material, monitoring the actual temperature of each placement point in real time, analyzing the staged temperature change rule of each placement point, and counting each undetermined placement point needing to be subjected to temperature regulation;
the temperature deviation evaluation module is used for acquiring the allowable loss temperature of the adjacent pipeline subsections, analyzing the temperature deviation influence coefficient of each pending placement point and accordingly obtaining the final adjustment temperature of each pending placement point;
the flow setting module is used for setting the required flow of each secondary pipeline of the liquid material conveying pipeline and obtaining the current opening of the main pipeline flow valve and the current opening of each secondary pipeline flow valve;
the flow monitoring module is used for acquiring material properties of liquid materials, calculating actual flow velocity of each secondary pipeline flow valve under the current opening degree according to the material properties, confirming a target pipeline and acquiring a main pipeline flow valve regulation and control demand state, wherein the main pipeline flow valve regulation and control demand state comprises an up-regulation state and a callback state;
the flow valve regulating and controlling module is used for acquiring the opening regulating and controlling value of the flow valve of the target pipeline, analyzing the opening regulating and controlling value of the flow valve of each auxiliary pipeline according to the opening regulating and controlling value of the flow valve of the target pipeline, and acquiring the opening regulating and controlling value of the flow valve of the main pipeline based on the state of the regulating and controlling requirement of the flow valve of the main pipeline;
the analysis method is characterized by analyzing the stepwise temperature change rule of each placement point, wherein the analysis method comprises the following steps:
setting the time length of a set time period, setting each time point in the set time period according to a preset equal time interval principle, extracting the actual temperature of each placement point at each time point in the set time period, and recording as，/>For the placement point number, +.>，/>Numbering for time points, ++>；
Calculating the temperature change index of each placement point in a set time period，Wherein->Adjusting a correction factor for the setting of the temperature change index, < + >>Respectively +.>Actual placement points within a set period of timeTemperature corresponds to maximum and minimum values, +.>Storing temperature for liquid material, +.>For a set temperature deviation tolerance, +.>Is the number of time points;
comparing the temperature change index of each placement point in the set time period with the temperature change index set threshold value, whenWhen indicate->The placement points are undetermined placement points with temperature to be regulated and controlled>Setting a threshold value for the temperature change index, and accordingly obtaining each undetermined placement point required to be subjected to temperature regulation;
the allowable loss temperature calculation mode of the adjacent pipeline subsections is as follows:
acquiring the length of a main pipeline of a liquid material conveying pipelineCalculating the allowable loss temperature of adjacent pipeline subsections>Wherein->Indicating the set normal loss temperature per unit pipe length, < >>Dividing the pipeline subsections into a number;
the analysis steps of analyzing the temperature deviation influence coefficients of the undetermined placement points are as follows:
setting the material storage temperature of the liquid material conveying pipeline as the initial end setting temperature of the pipeline；
Obtaining the layout positions of the undetermined placement points, counting the dividing number of the pipeline subsections of the layout positions of the undetermined placement points, and marking asCalculating the predicted temperature of each pending placement point>，/>Numbering the undetermined placement points->；
Obtaining the external environment temperature of the pipelineAnalyzing the temperature deviation influence coefficient of each undetermined placement point>，，/>Is the radius of the main pipeline of the liquid material conveying pipeline, +.>Setting a reference value corresponding to the surface area of the pipeline, +.>Setting a coefficient of temperature influence of the inner wall adhesive substance corresponding to the unit area ratio, wherein e is a natural constant and ++>Is the circumference ratio;
calculating the average value of the actual temperatures of the undetermined placement points in the set time period to obtain the average value temperature of the undetermined placement pointsEvaluating the normal loss temperature of the corresponding pipeline subsection of each to-be-positioned placement point>Wherein->Representing a temperature adjustment value corresponding to the set unit temperature deviation coefficient;
the actual flow velocity of each auxiliary pipeline flow valve under the current opening degree is correspondingly calculated in the following way:
installing a flowmeter on the liquid material outlet side of each auxiliary pipeline flow valve, acquiring the actual output flow of each time point of each auxiliary pipeline flow valve position in a set time period through the flowmeter, extracting the actual output flow of each auxiliary pipeline flow valve position in the starting time point and the actual output flow of each auxiliary pipeline flow valve position in the set time period, and respectively recording asFurther byAs the actual output flow of the flow valve position of the respective secondary line in the set time period +.>Is a secondary pipeLane number, ->；
Extracting density and viscosity of liquid material from material properties of liquid material, respectively recorded asCalculating the speed loss value of the liquid material in the pipeline conveying process>Wherein->Respectively representing the preset reference values of the density and viscosity of the liquid material,/->Indicating the set liquid material attribute coefficient corresponding to the unit flow rate loss value +.>Representing the corresponding correction proportion of the set speed loss value;
will beSubstituting the actual flow rate of each auxiliary pipeline flow valve under the current opening degree into a formula to calculate the actual flow rate +.>Wherein->Is->A plurality of secondary pipe radii;
the target pipeline is confirmed, the regulation and control demand state of the main pipeline flow valve is obtained, and the obtaining mode is as follows:
E1、comparing the actual output flow of each auxiliary pipeline flow valve position in the set time period with the demand flow of the corresponding auxiliary pipeline flow valve to obtain the regulation flow of each auxiliary pipeline flow valve, and recording as；
E2, ifExtracting the regulating flow with the largest absolute value distance from the difference value of 0 value from the regulating flow of each auxiliary pipeline flow valve, and recording the regulating flow as +.>And the auxiliary pipeline corresponding to the regulated flow is marked as a target pipeline>Indicating that a proposition symbol exists, and at the moment, regulating and controlling a demand state of a main pipeline flow valve to be an up-regulating state;
e3, ifExtracting the regulated flow with the smallest difference from the value 0 from the regulated flows of the flow valves of the auxiliary pipelines, and marking the regulated flow as +.>And the auxiliary pipeline corresponding to the regulated flow is marked as a target pipeline>Any proposition symbol is represented, and the regulating and controlling requirement state of the main pipeline flow valve is a callback state at the moment;
the method for acquiring the opening regulation value of each auxiliary pipeline flow valve comprises the following steps:
n1, extracting the target pipeline radius from the sub pipeline radius, and recording asSubstituted forEnter into the calculation formula->Obtaining a target pipeline flow valve opening regulating value, wherein ∈10>Setting an opening regulating value for the flow valve at a unit regulating speed;
n2, the current opening of the flow valve of the extraction target pipeline and the opening threshold value of the flow valve are respectively recorded as、/>If (if)Will->Correspondingly regulating and controlling the opening of the flow valve of the target pipeline as a regulating and controlling value of the opening of the flow valve of the target pipeline, otherwise, regulating the opening of the flow valve of the target pipeline to an opening threshold value of the flow valve;
n3, correspondingly regulating and controlling the opening of the flow valve corresponding to each auxiliary pipeline except the target pipeline in a corresponding regulation and control mode of the opening regulating and controlling value of the flow valve of the target pipeline in the same way;
the main pipeline flow valve opening regulation value obtaining mode is as follows:
z1, when the regulation demand state of the main pipeline flow valve is in an up-regulation state, acquiring the opening before regulating the target pipeline flow valve and marking asAnd extracting the actual flow rate of the target pipeline flow valve under the opening degree before adjustment>Obtaining the actual flow rate of the target pipeline flow valve under the opening threshold value +.>The same way obtains the target pipeline flow valve at +.>Actual flow rate +.>According to the formula->Obtaining the flow velocity compensation value of the main pipeline, and then obtaining the flow velocity compensation value of the main pipeline byObtaining a main pipeline flow valve opening regulating value;
z2, acquiring the opening of the main pipeline after the flow valve is regulated, comparing the opening with the opening threshold of the flow valve, and if the opening is larger than the opening threshold of the flow valve, determining an analysis formulaObtaining the callback opening degree of each auxiliary pipeline flow valve, and further adjusting the opening degree of each auxiliary pipeline flow valve according to +.>Performing corresponding regulation and control;
z3, when the regulation demand state of the main pipeline flow valve is a callback state, calculating the deficient flow velocity of the target pipeline flow valveAdding the compensation flow rate with the speed loss value of the liquid material in the pipeline conveying process to obtain the compensation flow rate of the main pipeline flow valve>Obtaining the opening regulating value of the main pipeline flow valve according to the opening regulating value>。
2. The intelligent material conveying control system according to claim 1, wherein: the final adjustment temperature determining mode of each undetermined placement point is as follows:
the average temperature of each undetermined placement point is differed from the material storage temperature to obtain the preliminary up-regulating temperature of each undetermined placement pointFurther by->As the final adjusted temperature for each pending placement point.
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| CN211015169U (en) * | 2019-10-28 | 2020-07-14 | 沪东重机有限公司 | Control system for temperature of pipeline confluence liquid |
| CN115063008A (en) * | 2022-06-30 | 2022-09-16 | 武汉誉钱乐房地产有限公司 | Intelligent management, dispatching and regulation system for smart city construction energy |
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| KR101623201B1 (en) * | 2015-11-18 | 2016-05-20 | (주)아이스메카텍 | Coal supply pipeline flow measurement method for call flow equal distribution of thermal power plants |
| CN106932215A (en) * | 2017-04-10 | 2017-07-07 | 中国石油大学(北京) | A kind of experimental provision for simulating liquid long distance pipeline closed conveying |
| CN110908414A (en) * | 2019-10-28 | 2020-03-24 | 沪东重机有限公司 | System and method for controlling temperature of pipeline confluence liquid |
| CN211015169U (en) * | 2019-10-28 | 2020-07-14 | 沪东重机有限公司 | Control system for temperature of pipeline confluence liquid |
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