CN108980438B - Bivalve Staged cotrol method and control device - Google Patents
Bivalve Staged cotrol method and control device Download PDFInfo
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- CN108980438B CN108980438B CN201710407701.0A CN201710407701A CN108980438B CN 108980438 B CN108980438 B CN 108980438B CN 201710407701 A CN201710407701 A CN 201710407701A CN 108980438 B CN108980438 B CN 108980438B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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Abstract
The present invention provides a kind of bivalve Staged cotrol method, comprising: PID adjusting is carried out from zero to 100% to the aperture of small-bore regulating valve；Reduce the aperture of small-bore regulating valve according to the first default slope, start from scratch simultaneously to the aperture of heavy caliber regulating valve and carry out PID adjusting, until the aperture of heavy caliber regulating valve reaches the first preset condition or the aperture of small-bore regulating valve reaches the second preset condition；So that small-bore regulating valve is persistently kept current opening value, while continuing to carry out PID adjusting to the aperture of heavy caliber regulating valve, until the current control flow of heavy caliber regulating valve reaches the presupposition multiple of small-bore regulating valve maximum control flow；Increase the aperture of small-bore regulating valve according to the second default slope, while continuing to carry out PID adjusting to the aperture of heavy caliber regulating valve, up to the two to 100%.Correspondingly, a kind of bivalve Staged cotrol device is provided.The present invention can realize the automatic steady switching of two different accuracies, different bore regulating valves under conditions of two kinds of different flow demands.
Description
Technical field
The present invention relates to automatic control technology fields, and in particular to a kind of bivalve Staged cotrol method and a kind of bivalve
Staged cotrol device.
Background technique
In Process Planning, it sometimes appear that mass flow needed for two different phases is of different sizes, and two
The different situation of the control accuracy requirement in stage configures two different bores, no simultaneously in design then for the same flowmeter
With the regulating valve of control precision, to meet the demand for control in two stages in production process, wherein small-bore regulating valve and big
The control mode curve graph of bore regulating valve is as shown in Figure 1.
But in actual use, it comes into operation after automatically controlling because two regulating valve bores are not identical, control precision not phase
Together, since linear adjustment of the regulating valve in small guide vane is poor, along with changes in flow rate many reasons such as slowly in whole process,
So that at the critical point of big small-bore regulating valve switching (as shown in Figure 1), when because of heavy caliber regulating valve within the scope of small guide vane
It is closed when opening and flow is caused to mutate, can occurred to shake for a long time when PID is controlled, cause the prolonged wave of flow
It is dynamic, until regulating valve flow slowly rises to after jumping out linear poor region, it is just gradually recovered stabilization, so that technique production has one
Fixed fluctuation, affects to product quality, or even quality accident can occur.
In order to cope with such situation, operator can only abandon automatically controlling and use manually controls, but actual production is wanted
It asks so that operator needs just once to adjust it every a few minutes, the workload of required adjustment is very big, causes to operate
The workload of personnel increases；Under working condition high-intensitive for a long time, it is also easy to occur to omit operation, or postpone behaviour
Make, so that the production of product can not be accomplished to carry out fully according to plan, there are certain uncontrollabilities for product quality, to company
Production plan completion rate and requisite quality rate cause certain puzzlement.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of bivalve for the drawbacks described above in the presence of the prior art
Staged cotrol method and a kind of bivalve Staged cotrol device can realize two under conditions of two kinds of different flow demands
The automatic steady switching of different accuracy, different bore regulating valves.
Solving technical solution used by present invention problem is:
The present invention provides a kind of bivalve Staged cotrol method comprising following steps:
PID adjusting is carried out to the aperture of small-bore regulating valve, so that its aperture is gradually increased to 100% from zero；
Reduce the aperture of small-bore regulating valve according to the first default slope, while the aperture of heavy caliber regulating valve is carried out
PID is adjusted, so that its aperture is gradually increased from zero, until the aperture of heavy caliber regulating valve reaches the first preset condition or osculum
The aperture of diameter regulating valve reaches the second preset condition；
So that small-bore regulating valve is persistently kept current opening value, while continuing to carry out PID to the aperture of heavy caliber regulating valve
It adjusts, so that its aperture continues to increase, until the current control flow of heavy caliber regulating valve reaches small-bore regulating valve maximum control
The presupposition multiple of flow processed；
Increase the aperture of small-bore regulating valve according to the second default slope, while continuing the aperture to heavy caliber regulating valve
PID adjusting is carried out, so that the aperture of big small-bore regulating valve is all gradually increased to 100%.
Optionally, the aperture to small-bore regulating valve carries out PID adjusting, so that its aperture is gradually increased to from zero
100% the step of specifically:
According to the first predetermined process parameter calculate small-bore regulating valve from aperture be zero to aperture be 100% during it is each
A time point corresponds to opening value and forming curves A, then carries out PID adjusting to small-bore control valve opening according to curve A, until
Small-bore control valve opening is gradually increased to 100% from zero.
Optionally, the step of aperture for making small-bore regulating valve reduces according to the first default slope specifically:
Straight line B obliquely is formed according to the first default slope, then adjusts opening for small-bore regulating valve according to straight line B
Degree, so that its aperture is gradually reduced since 100%；
The aperture to heavy caliber regulating valve carries out PID adjusting so that its aperture from zero be gradually increased the step of it is specific
Are as follows:
Heavy caliber regulating valve is calculated since its aperture is zero according to the second predetermined process parameter and the first default slope
The corresponding opening value of various time points and forming curves E, then according to curve E to heavy caliber control valve opening carry out PID tune
Section, so that its aperture is gradually increased.
Optionally, described the step of making small-bore regulating valve persistently keep current opening value specifically:
Horizontal straight line C is formed according to the current opening value of small-bore regulating valve, then adjusts small-bore adjusting according to straight line C
The aperture of valve, so that small-bore regulating valve persistently keeps current opening value；
The step of aperture for making small-bore regulating valve increases according to the second default slope specifically:
Straight line D obliquely is formed according to the second default slope and the current opening value, is then adjusted according to straight line D small
The aperture of bore regulating valve, so that its aperture is gradually increased to 100%；
It is described to continue to carry out PID adjusting to the aperture of heavy caliber regulating valve, so that its aperture continues to increase, and continue pair
The aperture of heavy caliber regulating valve carries out PID adjusting, so that the step of its aperture is gradually increased to 100% specifically:
Continued to calculate heavy caliber tune according to the current opening value of the second predetermined process parameter and small-bore regulating valve
Various time points corresponding opening value and forming curves F of the valve since its current aperture are saved, is then continued according to curve F to big
Bore control valve opening carries out PID adjusting, so that its aperture is gradually increased until 100%.
Optionally, after the aperture of big small-bore regulating valve all increases to 100%, the method also includes following steps:
After the aperture of small-bore regulating valve increases to 100% for the second time, PID tune is carried out to the aperture of small-bore regulating valve
Section, so that its aperture is maintained at 100%,
After the aperture of heavy caliber regulating valve increases to 100%, PID tune is continued to the aperture of heavy caliber regulating valve
Section, so that its aperture is maintained at 100%,
Until entire control process terminates, a growth cycle of technique production is completed.
Optionally, the absolute value of the described first default slope is equal to two times of the absolute value of the second default slope；And/or
The presupposition multiple is 2 times；And/or first preset condition has increased to for the aperture of heavy caliber regulating valve and has jumped out it
Controlling dead error；Second preset condition is that the aperture of small-bore regulating valve has been decreased to the aperture minimum of technique permission.
The present invention also provides a kind of bivalve Staged cotrol devices comprising pid control module, Staged cotrol module, first
Slop control module, aperture keep module, the second slop control module, small-bore regulating valve control module and heavy caliber regulating valve
Control module,
The pid control module is used under the distribution of Staged cotrol module, passes through small-bore regulating valve control module pair
The aperture of small-bore regulating valve carries out PID adjusting, so that its aperture is gradually increased to 100% from zero；
The first slope control module is led to for exporting the first default slope information to small-bore regulating valve control module
It crosses small-bore regulating valve control module and controls the aperture of small-bore regulating valve according to the first default slope reduction, the PID control
Module be also used to the aperture of small-bore regulating valve start reduce while under the distribution of Staged cotrol module, pass through heavy caliber
Regulating valve control module carries out PID adjusting to the aperture of heavy caliber regulating valve, so that its aperture is gradually increased from zero, it is big small-bore
The aperture that regulating valve control module controls big small-bore regulating valve respectively is preset up to the aperture of heavy caliber regulating valve reaches first
The aperture of condition or small-bore regulating valve reaches the second preset condition；
The aperture keeps module to control for exporting the current aperture value information of small-bore regulating valve to small-bore regulating valve
Module controls small-bore regulating valve by small-bore regulating valve control module and persistently keeps current opening value, the PID control mould
Block is also used under the distribution of Staged cotrol module, continues to open heavy caliber regulating valve by heavy caliber regulating valve control module
Degree carries out PID adjusting, so that its aperture continues to increase, big small-bore regulating valve control module controls big small-bore regulating valve respectively
Aperture until the current control flow of heavy caliber regulating valve reaches the presupposition multiple of small-bore regulating valve maximum control flow；
The second slop control module is led to for exporting the second default slope information to small-bore regulating valve control module
It crosses small-bore regulating valve control module and controls the aperture of small-bore regulating valve and increase according to the second default slope, until small-bore tune
The aperture of section valve increases to 100%；The pid control module is also used to while the aperture of small-bore regulating valve starts to increase
Under the distribution of Staged cotrol module, continue to carry out the aperture of heavy caliber regulating valve by heavy caliber regulating valve control module
PID is adjusted, so that its aperture continues to increase, until the aperture of heavy caliber regulating valve also increases to 100%.
Optionally, the pid control module is specifically used for, according to the first predetermined process parameter calculate small-bore regulating valve from
Aperture be zero to aperture be 100% during various time points correspond to opening value and forming curves A, then in Staged cotrol mould
Under the distribution of block, PID adjusting is carried out according to aperture of the curve A to small-bore regulating valve by small-bore regulating valve control module,
Until small-bore control valve opening is gradually increased to 100% from zero.
Optionally, the first slope control module is specifically used for, and forms straight line B obliquely according to the first default slope
And it exports to small-bore regulating valve control module, then small-bore tune is adjusted according to straight line B by small-bore regulating valve control module
The aperture for saving valve, so that its aperture is gradually reduced since 100%；
The pid control module is specifically also used to, and is calculated according to the second predetermined process parameter and the first default slope big
The corresponding opening value of various time points of the bore regulating valve since its aperture is zero and forming curves E, then in Staged cotrol
Under the distribution of module, PID tune is carried out according to aperture of the curve E to heavy caliber regulating valve by heavy caliber regulating valve control module
Section, so that its aperture is gradually increased from zero.
Optionally, the aperture keeps module to be specifically used for, and is formed according to the current opening value of small-bore regulating valve horizontal
Straight line C is simultaneously exported to small-bore regulating valve control module, then adjusts osculum according to straight line C by small-bore regulating valve control module
The aperture of diameter regulating valve, so that it persistently keeps current opening value；
The second slop control module is specifically used for, and is formed according to the second default slope and the current opening value oblique
On straight line D and export to small-bore regulating valve control module, then by small-bore regulating valve control module according to straight line D adjusting
The aperture of small-bore regulating valve, so that its aperture is gradually increased to 100%；
The pid control module is specifically also used to, according to the second predetermined process parameter and small-bore regulating valve
Current opening value continues the corresponding opening value of various time points calculated heavy caliber regulating valve since its current aperture and is formed
Curve F is continued according to curve F to big mouth then under the distribution of Staged cotrol module by heavy caliber regulating valve control module
Diameter control valve opening carries out PID adjusting, so that its aperture continues to increase until 100%.
Optionally, the pid control module is also used to, after the aperture of small-bore regulating valve increases to 100% for the second time,
PID tune is carried out by aperture of the small-bore regulating valve control module to small-bore regulating valve under the distribution of Staged cotrol module
Section, so that its aperture is maintained at 100%, and after the aperture of heavy caliber regulating valve increases to 100%, in Staged cotrol module
Distribution under pass through heavy caliber regulating valve control module to the aperture of heavy caliber regulating valve continue PID adjust so that it is opened
Degree is maintained at 100%, until entire control process terminates, completes a growth cycle of technique production.
Optionally, the absolute value of the described first default slope is equal to two times of the absolute value of the second default slope；And/or
The presupposition multiple is 2 times；And/or first preset condition has increased to for the aperture of heavy caliber regulating valve and has jumped out it
Controlling dead error；Second preset condition is that the aperture of small-bore regulating valve has been decreased to the aperture minimum of technique permission.
The utility model has the advantages that
The present invention realizes two different bores, the different regulating valves for controlling precision under two kinds of different flow demand conditions
Automation control so that flow grows steadily in the entire production cycle be not in be influenced because flow fluctuates widely
The problem of quality, improves the inherent quality of product, improves to realize the steady control of flow in entire production process
The production efficiency of technique production, also reduces the labor intensity of operator.
Detailed description of the invention
Fig. 1 is the control mode curve of small-bore regulating valve and heavy caliber regulating valve during existing bivalve Staged cotrol
Figure；
Fig. 2 is the flow chart for the bivalve Staged cotrol method that the embodiment of the present invention 1 provides；
Fig. 3 is the structural schematic diagram for the bivalve Staged cotrol device that the embodiment of the present invention 2 provides；
Fig. 4 is using small-bore regulating valve and heavy caliber regulating valve during the improved bivalve Staged cotrol of the present invention
Control mode curve graph.
In figure: 1- detects signal input module；2-PID control module；3- Staged cotrol module；The small-bore adjusting of 4-
Valve control module；5- heavy caliber regulating valve control module；The small-bore regulating valve of 6-；7- heavy caliber regulating valve；8- mode turns
Change the mold block；9- signal selection module；10- condition judgment module；11- first slope control module；The second slop control of 12-
Module；13- aperture keeps module.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawings and examples to this
Invention is described in further detail.
The present invention can automatically adjust this by the valve of process control two different bores in parallel on same pipeline
The aperture of two valves is automatically closed the aperture of smaller diameter valve by certain slope when running to the stage of two valve transfers
It is small, while large bore valves being made to carry out PID control automatically, then when flow is larger, by certain slope by smaller diameter valve
Aperture is restored to 100%, latter two valve continue it is automatic carry out PID control, to reach the mesh of automatic control fluid flow
's.Below by embodiment 1 and embodiment 2, the technical schemes of the invention are described in detail.
It should be noted that the bivalve referred in the present invention refers to the adjusting of two different bores, different control precision
Valve, the two are connected in parallel, wherein the biggish regulating valve of bore is known as heavy caliber regulating valve, and the lesser regulating valve of bore is referred to as small
Bore regulating valve, the two are connected in parallel.
Embodiment 1:
The present embodiment provides a kind of bivalve Staged cotrol method under special operation condition, with realize two kinds of different caliber sizes,
The Staged cotrol of the valve of difference control precision, can satisfy the different flow demand in technique different time sections, and can be complete
Full-automatic smoothly variation and switching.As shown in Figure 2 and Figure 4, the control method includes the following steps S101 to S104.
S101. PID adjusting is carried out to the aperture of small-bore regulating valve, so that its aperture is gradually increased to 100% from zero.
This step is specifically, calculating small-bore regulating valve from aperture according to the first predetermined process parameter is zero to be to aperture
Various time points correspond to opening value and forming curves A during 100%, then according to curve A to small-bore control valve opening
PID adjusting is carried out, until small-bore control valve opening is gradually increased to 100% from zero.
Wherein, the first predetermined process parameter is related to the bore of small-bore regulating valve and flow, specifically can be by ability
Field technique personnel set.The opening value of the corresponding small-bore regulating valve of the start time point of curve A is zero, terminates time point
The opening value of corresponding small-bore regulating valve is 100%.
Reduce the aperture of small-bore regulating valve since 100% according to the first default slope, while to heavy caliber
The aperture of regulating valve carries out PID adjusting, so that its aperture is gradually increased from zero, until the aperture of heavy caliber regulating valve reaches first
The aperture of preset condition or small-bore regulating valve reaches the second preset condition.
In this step, the aperture of small-bore regulating valve reduces to be occurred simultaneously with the increase of the aperture of heavy caliber regulating valve, and small
The aperture that the aperture of bore regulating valve need to be decreased to heavy caliber regulating valve reaches the first preset condition or small-bore regulating valve
Until opening value when aperture reaches the second preset condition, and the aperture of heavy caliber regulating valve gradually increases by PID adjusting from zero
Greatly.
Wherein, the aperture for making small-bore regulating valve reduces since 100% according to the first default slope specifically:
Straight line B obliquely is formed according to the first default slope, then adjusts opening for small-bore regulating valve according to straight line B
Degree, so that its aperture is gradually reduced since 100%.
The aperture to heavy caliber regulating valve carries out PID adjusting, so that its aperture is gradually increased from zero specifically:
Heavy caliber regulating valve is calculated since its aperture is zero according to the second predetermined process parameter and the first default slope
The corresponding opening value of various time points and forming curves E, then according to curve E to heavy caliber control valve opening carry out PID tune
Section, so that its aperture is gradually increased.
More preferably, first preset condition has increased to for the aperture of heavy caliber regulating valve and has jumped out its controlling dead error；
Second preset condition is that the aperture of small-bore regulating valve has been decreased to the aperture minimum of technique permission.
Wherein, the second predetermined process parameter is related to the bore of heavy caliber regulating valve and flow, specifically can be by ability
Field technique personnel set.The opening value of the corresponding heavy caliber regulating valve of the start time point of curve E is zero, terminates time point
The opening value of corresponding heavy caliber regulating valve is that the aperture of heavy caliber regulating valve reaches the first preset condition or small-bore adjusting
The aperture of valve reaches corresponding opening value when the second preset condition.The corresponding small-bore regulating valve of the start time point of straight line B
Opening value is 100%, the opening value of termination time point corresponding small-bore regulating valve is that small-bore regulating valve is default according to first
Slope reduces aperture until the aperture of heavy caliber regulating valve reaches the first preset condition or the aperture of small-bore regulating valve reaches
Corresponding opening value when the second preset condition, i.e., " current opening value " hereinafter.
S103. small-bore regulating valve is made persistently to keep current opening value, at the same continue to the aperture of heavy caliber regulating valve into
Row PID is adjusted, so that its aperture continues to increase, until the current control flow of heavy caliber regulating valve reaches small-bore regulating valve most
The presupposition multiple of big control flow.
In the present embodiment, the current opening value refers to that small-bore regulating valve reduces aperture according to the first default slope
Until the aperture of heavy caliber regulating valve reaches the first preset condition or the aperture of small-bore regulating valve reaches the second preset condition
When corresponding opening value.Small-bore regulating valve keeps aperture and the aperture increase of heavy caliber regulating valve to occur simultaneously, and small-bore
The current control flow that the aperture of regulating valve need to remain to heavy caliber regulating valve reaches small-bore regulating valve maximum control flow
Until when presupposition multiple.
Wherein, small-bore regulating valve is made persistently to keep current opening value specifically:
Horizontal straight line C is formed according to the current opening value of small-bore regulating valve, then adjusts small-bore adjusting according to straight line C
The aperture of valve, so that small-bore regulating valve persistently keeps current opening value；Moreover, the corresponding osculum of all time points of straight line C
The opening value of diameter regulating valve is " the current opening value ".
More preferably, the presupposition multiple is 2 times.
Increase the aperture of small-bore regulating valve according to the second default slope, while continuing to heavy caliber regulating valve
Aperture carry out PID adjusting so that the aperture of big small-bore regulating valve is all gradually increased to 100%.
In this step, when the aperture of small-bore regulating valve increases, the aperture of heavy caliber regulating valve by original regulative mode after
It is continuous to increase, until the aperture of the two all increases to 100%, wherein the aperture of small-bore regulating valve increases to 100% for the second time.When
So, it is not overlapped at the time of the aperture of big small-bore regulating valve increases to 100%, in the present embodiment, small-bore regulating valve is opened
Degree first increases to 100%, increases to 100% after the aperture of heavy caliber regulating valve.
Wherein, the aperture for making small-bore regulating valve increases according to the second default slope specifically:
Straight line D obliquely is formed according to the second default slope and the current opening value, is then adjusted according to straight line D small
The aperture of bore regulating valve, so that its aperture is gradually increased to 100%.
It is described to continue to carry out PID adjusting to the aperture of heavy caliber regulating valve in step S103 and step S104, so that its
Aperture continues to increase, and continues to carry out PID adjusting to the aperture of heavy caliber regulating valve so that its aperture be gradually increased to
100% specifically:
Continued to calculate heavy caliber tune according to the current opening value of the second predetermined process parameter and small-bore regulating valve
Various time points corresponding opening value and forming curves F of the valve since its current aperture are saved, is then continued according to curve F to big
Bore control valve opening carries out PID adjusting, so that its aperture is gradually increased until 100%.
More preferably, the absolute value of the described first default slope is equal to two times of the absolute value of the second default slope.
Wherein, the opening value of the corresponding small-bore regulating valve of the start time point of straight line D " current opening value ", end for described in
Only the opening value of time point corresponding small-bore regulating valve is 100%.The corresponding heavy caliber regulating valve of the start time point of curve F
The opening value that terminates time point corresponding heavy caliber regulating valve of the opening value equal to curve E, the termination time point of curve F is corresponding
Heavy caliber regulating valve opening value be 100%.
In addition, the bivalve control method may also include the steps of S105.
S105. after the aperture of small-bore regulating valve increases to 100% for the second time, the aperture of small-bore regulating valve is carried out
PID is adjusted, so that its aperture is maintained at 100%, after the aperture of heavy caliber regulating valve increases to 100%, is adjusted to heavy caliber
The aperture of valve continues PID adjusting, so that its aperture is maintained at 100%, the aperture of the two is held in 100% until entire
Control process terminates, to complete a growth cycle of technique production.
The bivalve control method may also include the steps of S100 before step S101.
Whether S100. detect in the main pipe rail of big small-bore regulating valve front end in parallel has fluid to flow through, once it detects
There is fluid to flow through, begins to execute step S101, otherwise continue to test.
Bivalve Staged cotrol method described in the present embodiment can be realized under conditions of two kinds of different flow demands two not
The automatic steady switching of same precision, different bore regulating valves steadily increases to reach and be controlled stability of flow in entire production process
Long purpose；Moreover, entire control process is all made of procedure auto-control, manual intervention is not needed, reduces operator's
Labor intensity.
Embodiment 2:
The present embodiment provides the bivalve Staged cotrol device under a kind of special operation condition, with realize two kinds of different caliber sizes,
The Staged cotrol of the valve of difference control precision, can satisfy the different flow demand in technique different time sections, and can be complete
Full-automatic smoothly variation and switching.As shown in Figure 3 and Figure 4, the control device includes pid control module 2, Staged cotrol mould
Block 3, first slope control module 11, aperture keep module 13, the second slop control module 12, small-bore regulating valve control module
4 and heavy caliber regulating valve control module 5.The bivalve is small-bore regulating valve 6 and heavy caliber regulating valve 7.
The signal that the pid control module 2 exports is introduced into the signal input part of Staged cotrol module 3, Staged cotrol mould
Two signal output ends of block 3 introduce signal input part and the heavy caliber regulating valve control of small-bore regulating valve control module 4 respectively
The signal input part of molding block 5, then small-bore regulating valve control module 4 connects the small-bore regulating valve 6 at scene, heavy caliber tune
Section valve control module 5 connects the heavy caliber regulating valve 7 at scene.Pid control module 2 is used under the distribution of Staged cotrol module 3,
PID adjusting is carried out to the aperture of small-bore regulating valve 6 by small-bore regulating valve control module 4 so that its aperture from zero gradually
Increase to 100%.Wherein, pid control module 2 also has process parameter control value input terminal, for inputting the first predetermined process
Parameter and the second predetermined process parameter, specifically can be by technologist according to bore, flow and the equipment of big small-bore regulating valve
Runing time and operation conditions are set.
Specifically, the pid control module 2 is from aperture according to the small-bore regulating valve 6 of the first predetermined process parameter calculating
Zero to aperture be 100% during various time points correspond to opening value simultaneously forming curves A, then in Staged cotrol module 3
Under distribution, PID adjusting is carried out according to aperture of the curve A to small-bore regulating valve 6 by small-bore regulating valve control module 4, directly
100% is gradually increased to small-bore 6 aperture of regulating valve from zero.
Wherein, the first predetermined process parameter is related to the bore of small-bore regulating valve 6 and flow, specifically can be by ability
Field technique personnel set.The opening value of the corresponding small-bore regulating valve 6 of the start time point of curve A is zero, terminates the time
The opening value of the corresponding small-bore regulating valve 6 of point is 100%.
The first slope control module 11 is for exporting the first default slope information to small-bore regulating valve control module
4, reduced by the aperture that small-bore regulating valve control module 4 controls small-bore regulating valve 6 according to the first default slope, it is described
Pid control module 2 is also used to while the aperture of small-bore regulating valve 6 starts to reduce under the distribution of Staged cotrol module 3,
PID adjusting is carried out to the aperture of heavy caliber regulating valve 7 by heavy caliber regulating valve control module 5 so that its aperture from zero gradually
Increase, big small-bore regulating valve control module 4 and 5 controls the aperture of big small-bore regulating valve 6 and 7 respectively until heavy caliber is adjusted
The aperture of valve 7 reaches the first preset condition or the aperture of small-bore regulating valve 6 reaches the second preset condition.
Wherein, the aperture of small-bore regulating valve 6 reduces occurs simultaneously with the increase of the aperture of heavy caliber regulating valve 7, and osculum
The aperture that the aperture of diameter regulating valve 6 need to be decreased to heavy caliber regulating valve 7 reaches the first preset condition or small-bore regulating valve 6
Until opening value when aperture reaches the second preset condition, and the aperture of heavy caliber regulating valve 7 gradually increases by PID adjusting from zero
Greatly.
Specifically, the first slope control module 11 forms straight line B obliquely according to the first default slope and exports
Extremely small-bore regulating valve control module 4, then small-bore regulating valve 6 is adjusted according to straight line B by small-bore regulating valve control module 4
Aperture so that its aperture is gradually reduced since 100%, to realize the aperture of small-bore regulating valve according to first slope
The straight line B set in control module 11 is acted.The pid control module 2 is also according to the second predetermined process parameter and
One default slope calculates various time points corresponding opening value and forming curves of the heavy caliber regulating valve 7 since its aperture is zero
E is adjusted heavy caliber according to curve E by heavy caliber regulating valve control module 5 then under the distribution of Staged cotrol module 3
The aperture of valve 7 carries out PID adjusting, so that its aperture is gradually increased from zero.
Wherein, the second predetermined process parameter is related to the bore of heavy caliber regulating valve 7 and flow, specifically can be by ability
Field technique personnel set.The opening value of the corresponding heavy caliber regulating valve 7 of the start time point of curve E is zero, terminates the time
The opening value of the corresponding heavy caliber regulating valve 7 of point is that the aperture of heavy caliber regulating valve 7 reaches the first preset condition or small-bore
The aperture of regulating valve 6 reaches corresponding opening value when the second preset condition.The corresponding small-bore adjusting of the start time point of straight line B
It is small-bore regulating valve 6 according to that the opening value of valve 6, which is 100%, terminates the opening value of time point corresponding small-bore regulating valve 6
One default slope reduces aperture until the aperture of heavy caliber regulating valve 7 reaches the first preset condition or small-bore regulating valve 6
Aperture reaches corresponding opening value when the second preset condition, i.e., " current opening value " hereinafter.
More preferably, first preset condition has increased to for the aperture of heavy caliber regulating valve 7 and has jumped out its controlling dead error；
Second preset condition is that the aperture of small-bore regulating valve 6 has been decreased to the aperture minimum of technique permission.
The aperture keeps module 13 for exporting the current aperture value information of small-bore regulating valve to small-bore regulating valve control
Molding block 4 controls small-bore regulating valve 6 by small-bore regulating valve control module 4 and persistently keeps current opening value, the PID
Control module 3 is also used under the distribution of Staged cotrol module 3, is continued by heavy caliber regulating valve control module 5 to heavy caliber
The aperture of regulating valve 7 carries out PID adjusting, so that its aperture continues to increase, big small-bore regulating valve control module 4 and 5 is controlled respectively
The aperture of big small-bore regulating valve 6 and 7 is made until the current control flow of heavy caliber regulating valve 7 reaches small-bore regulating valve 6 most
The presupposition multiple of big control flow.Certainly, aperture can also be not provided with to keep module 13 and realize by manual control small-bore
The aperture of regulating valve is kept.
Wherein, the current opening value refers to that small-bore regulating valve 6 reduces aperture until big according to the first default slope
When the aperture that the aperture of bore regulating valve 7 reaches the first preset condition or small-bore regulating valve 6 reaches the second preset condition pair
The opening value answered.Small-bore regulating valve 6 keeps aperture and the aperture increase of heavy caliber regulating valve 7 to occur simultaneously, and small-bore tune
The current control flow that the aperture of section valve 6 need to remain to heavy caliber regulating valve 7 reaches the maximum control flow of small-bore regulating valve 6
Until when presupposition multiple.
Specifically, the aperture keeps module 13 to form horizontal straight line C simultaneously according to the current opening value of small-bore regulating valve
It exports to small-bore regulating valve control module 4, then small-bore tune is adjusted according to straight line C by small-bore regulating valve control module 4
The aperture for saving valve 6, so that it persistently keeps current opening value, so that the aperture for realizing small-bore regulating valve is kept according to aperture
The straight line C set in module 13 is acted；Moreover, the opening value of all time points of straight line C corresponding small-bore regulating valve
It is " the current opening value ".
More preferably, the presupposition multiple is 2 times.
The second slop control module 12 is for exporting the second default slope information to small-bore regulating valve control module
4, increased by the aperture that small-bore regulating valve control module 4 controls small-bore regulating valve 6 according to the second default slope, until small
The aperture of bore regulating valve 6 increases to 100%；The pid control module 2 is also used to start in the aperture of small-bore regulating valve 6
While increase under the distribution of Staged cotrol module 3, continued by heavy caliber regulating valve control module 5 to heavy caliber regulating valve
7 aperture carries out PID adjusting, so that its aperture continues to increase, until the aperture of heavy caliber regulating valve 7 also increases to 100%.
Wherein, when the aperture of small-bore regulating valve 6 increases, the aperture of heavy caliber regulating valve 7 is continued by original regulative mode
Increase, until the aperture of the two all increases to 100%, and the aperture of small-bore regulating valve 6 increases to 100% for the second time.When
So, it is not overlapped at the time of the aperture of big small-bore regulating valve 6 and 7 increases to 100%, in the present embodiment, small-bore regulating valve 6
Aperture first increase to 100%, increase to 100% after the aperture of heavy caliber regulating valve 7.
Specifically, the second slop control module 12 is formed oblique according to the second default slope and the current opening value
On straight line D and export to small-bore regulating valve control module 4, then by small-bore regulating valve control module 4 according to straight line D tune
The aperture of small-bore regulating valve 6 is saved, so that its aperture is gradually increased to 100%, to realize the aperture of small-bore regulating valve
It is acted according to the straight line D set in the second slop control module 12.The pid control module 2 is also according to the second default work
The current opening value of skill parameter and small-bore regulating valve 6 continues to calculate heavy caliber regulating valve 7 since its current aperture
The corresponding opening value of various time points and forming curves F pass through heavy caliber tune then under the distribution of Staged cotrol module 3
Section valve control module 5 keeps continuing according to curve F to 7 aperture of heavy caliber regulating valve current opening value since small-bore regulating valve
PID adjusting is carried out, so that its aperture continues to increase until 100%.
More preferably, the absolute value of the described first default slope is equal to two times of the absolute value of the second default slope.
Wherein, the opening value of the corresponding small-bore regulating valve 6 of the start time point of straight line D be " the current opening value ",
The opening value for terminating time point corresponding small-bore regulating valve 6 is 100%.The corresponding heavy caliber tune of the start time point of curve F
Save the opening value that terminates time point corresponding heavy caliber regulating valve 7 of the opening value equal to curve E of valve 7, the termination time of curve F
The opening value of the corresponding heavy caliber regulating valve 7 of point is 100%.
In addition, the pid control module 2 is also used to, after the aperture of small-bore regulating valve 6 increases to 100% for the second time,
PID is carried out by aperture of the small-bore regulating valve control module 4 to small-bore regulating valve 6 under the distribution of Staged cotrol module 3
It adjusts, so that its aperture is maintained at 100%, and after the aperture of heavy caliber regulating valve 7 increases to 100%, in Staged cotrol
Pass through heavy caliber regulating valve control module 5 under the distribution of module 3 and PID adjusting is continued to the aperture of heavy caliber regulating valve 7, with
Its aperture is set to be maintained at 100%, until entire control process terminates, to complete a growth cycle of technique production.
As shown in figure 3, the bivalve control device may also include detection signal input module 1, the signal of output is introduced
Whether the signal input part of pid control module 2 has in the main pipe rail for detecting the big small-bore front end of regulating valve 6 and 7 in parallel
Fluid flows through, once having detected that fluid flows through, just outputs signal to pid control module 2 so that its start to work, otherwise after
Continuous detection.
Correspondingly, the major function of pid control module 2 is, when detecting 1 output signal of signal input module, according to PID
The parameter (i.e. the first predetermined process parameter and the second predetermined process parameter) being arranged in control module 2 combines present flow rate to control institute
Place calculates valve to be controlled the stage in the opening value at each corresponding time point in locating stage.The major function of Staged cotrol module 3
It is to be allocated the opening value of the calculated valve to be controlled of pid control module 2 according to corresponding relationship, and be transferred to valve to be controlled
The input terminal of door, to realize the control of valve opening.
The bivalve control device may also include mode conversion module 8, signal selection module 9 and condition judgment module 10.
The program output end of the program input terminal connection signal selecting module 9 of small-bore regulating valve control module 4, signal choosing
Three signal input parts for selecting module 9 are separately connected the signal output end of first slope control module 11, the second slop control mould
The signal output end and aperture of block 12 keep the signal output end of module 13.Moreover, first slope control module 11, the second slope
Control module 12 and aperture keep module 13 to all have start value input, for inputting small-bore regulating valve 6 corresponding each stage
The starting opening value of (straight line B, straight line C and straight line D).
The signal behavior end of mode conversion module 8 and the signal behavior end of signal selection module 9 are all connected with condition and judge mould
The output end of block 10.The output end of mode conversion module 8 be separately connected small-bore regulating valve control module 4 mode selection terminal,
The mode selection terminal of first slope control module 11, the mode selection terminal of the second slop control module 12 and aperture keep module 13
Mode selection terminal.
The condition judgment module 10 exports corresponding rank for judging which stage present flow rate control is specifically in
Segment signal is to mode conversion module 8 and signal selection module 9, so that corresponding stage signal be made to enable mode turn as Rule of judgment
Mold changing block 8 and signal selection module 9 make corresponding selection.
The mode conversion module 8 is used for after the stage signal for receiving the output of condition judgment module 10, according to current
The source of the aperture input value of corresponding valve is switched to first slope control module 11, the second slope by the stage locating for flow control
Control module 12, aperture keep module 13 or pid control module 2, to realize small-bore regulating valve control module 4 or heavy caliber
The attribute of regulating valve control module 5 switches.For example, if present flow rate controls locating stage homologous thread A, by small-bore adjusting
The source of valve opening input value is switched to pid control module 2, provides small-bore control valve opening and curve by pid control module 2
The corresponding input value of A；If present flow rate controls the locating stage and corresponds to straight line B, by coming for small-bore control valve opening input value
Source is switched to first slope control module 11, provides small-bore control valve opening and B pairs of straight line by first slope control module 11
The input value answered；If present flow rate controls the locating stage and corresponds to straight line C, the source of small-bore control valve opening input value is cut
It is changed to aperture and keeps module 13, keep module 13 to provide small-bore control valve opening input value corresponding with straight line C by aperture；If
The present flow rate control locating stage corresponds to straight line D, then the source of small-bore control valve opening input value is switched to the second slope
Control module 12 provides small-bore control valve opening input value corresponding with straight line D by the second slop control module 12；If current
Stage homologous thread E or F locating for flow control, then be switched to PID control mould for the source of heavy caliber control valve opening input value
Block 2 provides heavy caliber control valve opening input value corresponding with curve E or curve F by pid control module 2.
The signal selection module 9 is used for after the stage signal for receiving the output of condition judgment module 10, according to current
First slope control module 11, the second slop control module 12 or aperture are kept the output of module 13 by the stage locating for flow control
Signal passes to small-bore regulating valve control module 4, thus by small-bore regulating valve control module 4 according to the output signal
Adjust the aperture of small-bore regulating valve 6.For example, first slope is controlled if present flow rate controls the locating stage and corresponds to straight line B
Output signal (the i.e. straight line B) output of module 11 is to small-bore regulating valve control module 4, to make small-bore regulating valve control mould
(reduction) is adjusted according to aperture of the straight line B to small-bore regulating valve 6 in block 4；If it is corresponding straight that present flow rate controls the locating stage
Aperture is then kept the output signal (i.e. straight line C) of module 13 to export to small-bore regulating valve control module 4, to make small by line C
Bore regulating valve control module 4 is adjusted according to aperture of the straight line C to small-bore regulating valve 6 and (keeps current value)；If current
Stage locating for flow control corresponds to straight line D, then by output signal (the i.e. straight line D) output of the second slop control module 12 to osculum
Diameter regulating valve control module 4, thus make small-bore regulating valve control module 4 according to straight line D to the aperture of small-bore regulating valve 6 into
Row adjusts (increase).
The present embodiment described device can be referred to mutually with the correlated characteristic in 1 the method for embodiment.
The working principle of bivalve Staged cotrol device described in the present embodiment are as follows: existing point of journey is utilized in its basic control mode
Then the mode of control increases first slope control module in the intersection of two valve transfers, while making heavy caliber regulating valve
It quickly opens, and jumps out the controlling dead error of its valve, and then realize the steady control of flow, control effect figure is as shown in Figure 4.
The control process of bivalve Staged cotrol device described in the present embodiment are as follows: automatically control after coming into operation, at the beginning big osculum
Two regulating valves 6 and 7 of diameter all in the control of pid control module 2 in.In the operation initial stage, process requirements flow is smaller,
And its control accuracy requirement is higher, changes in flow rate is no more than setting value, so making small-bore adjustment effect in flow control
Initial stage, and within this stage, heavy caliber regulating valve need to remain off, and be not involved in control.
When the aperture of small-bore regulating valve 6 reaches maximum value (i.e. 100%) for the first time, heavy caliber regulating valve 7 starts basis
The output of pid control module 2 is accordingly adjusted, and first slope control module 11 is simultaneously activated, and small-bore regulating valve 6 is opened
The control mode of degree is converted into slop control by PID automatic control, and mode is converted to PROGRAM-MAN by AUTO, at this time PID
Output does not act on small-bore regulating valve 6, acts only on heavy caliber regulating valve 7.Because the aperture of small-bore regulating valve 6 is according to
The output valve of one slop control module 11 reduces accordingly, and pid control module 2 can then detect current actual flow than setting stream
It measures small, then can automatically adjust the aperture of heavy caliber regulating valve 7, to meet the steady conveying of flow, what small-bore regulating valve turned down
Meanwhile heavy caliber regulating valve is quickly opened greatly, smoothness crosses the small guide vane controlling dead error of heavy caliber regulating valve.
Certainly, the aperture of small-bore regulating valve is not unconfined reduction, when the aperture of heavy caliber regulating valve has jumped out it
After the range of controlling dead error or the aperture of small-bore regulating valve closed to technique allow aperture minimum when, small-bore adjusting
It is constant (can also by manually control realize) that the control mode of valve should be maintained at current aperture, and heavy caliber regulating valve then again by
Pid control module continues to automatically control.
It is small-bore when heavy caliber regulating valve, which currently controls flow, reaches 2 times of small-bore regulating valve maximum control flow
The control mode of adjusting changes again, that is, is again converted into slop control, is controlled by the second slop control module 12,
Its aperture initial value is the current opening value of small-bore regulating valve, and slope is 0.5 times of the first default slope, and target value is
100%, and heavy caliber regulating valve then continues to be automatically controlled by PID by original regulative mode.When small-bore control valve opening again
After reaching standard-sized sheet, control mode changes again, is converted into PID by slop control and automatically controls.
Entire flow control process later then all carries out PID automatic control by pid control module 2, until entire control
Process processed terminates, and completes a growth cycle of technique production.
Bivalve Staged cotrol device described in the present embodiment can be realized under conditions of two kinds of different flow demands two not
The automatic steady switching of same precision, different bore regulating valves steadily increases to reach and be controlled stability of flow in entire production process
Long purpose；Moreover, entire control process is all made of procedure auto-control, manual intervention is not needed, reduces operator's
Labor intensity.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (12)
1. a kind of bivalve Staged cotrol method, which is characterized in that the bivalve refers to the adjusting of the different bores of in parallel two
Valve, the biggish regulating valve of medium caliber are heavy caliber regulating valve, and the lesser regulating valve of bore is small-bore regulating valve；
The bivalve Staged cotrol method includes the following steps successively executed:
PID adjusting is carried out to the aperture of small-bore regulating valve, so that its aperture is gradually increased to 100% from zero；
Reduce the aperture of small-bore regulating valve according to the first default slope, while PID is carried out to the aperture of heavy caliber regulating valve
It adjusts, so that its aperture is gradually increased from zero, until the aperture of heavy caliber regulating valve reaches the first preset condition or small-bore
The aperture of regulating valve reaches the second preset condition；
So that small-bore regulating valve is persistently kept current opening value, while continuing to carry out PID adjusting to the aperture of heavy caliber regulating valve,
So that its aperture continues to increase, until the current control flow of heavy caliber regulating valve reaches small-bore regulating valve maximum control flow
Presupposition multiple；
Increase the aperture of small-bore regulating valve according to the second default slope, while continuing to carry out the aperture of heavy caliber regulating valve
PID is adjusted, so that the aperture of big small-bore regulating valve is all gradually increased to 100%.
2. bivalve Staged cotrol method according to claim 1, which is characterized in that the aperture to small-bore regulating valve
Carry out PID adjusting so that its aperture from zero be gradually increased to 100% the step of specifically:
According to the first predetermined process parameter calculate small-bore regulating valve from aperture be zero to aperture be 100% during it is each when
Between put corresponding opening value and forming curves A, PID adjusting then is carried out to small-bore control valve opening according to curve A, until osculum
Diameter control valve opening is gradually increased to 100% from zero.
3. bivalve Staged cotrol method according to claim 1, which is characterized in that
The step of aperture for making small-bore regulating valve reduces according to the first default slope specifically:
Straight line B obliquely is formed according to the first default slope, the aperture of small-bore regulating valve is then adjusted according to straight line B, with
It is gradually reduced its aperture since 100%；
The aperture to heavy caliber regulating valve carries out PID adjusting so that its aperture from zero be gradually increased the step of specifically:
It is each since its aperture is zero that heavy caliber regulating valve is calculated according to the second predetermined process parameter and the first default slope
Then a time point corresponding opening value and forming curves E carry out PID adjusting to heavy caliber control valve opening according to curve E, with
It is gradually increased its aperture.
4. bivalve Staged cotrol method according to claim 1, which is characterized in that
Described the step of making small-bore regulating valve persistently keep current opening value specifically:
Horizontal straight line C is formed according to the current opening value of small-bore regulating valve, then adjusts small-bore regulating valve according to straight line C
Aperture, so that small-bore regulating valve persistently keeps current opening value；
The step of aperture for making small-bore regulating valve increases according to the second default slope specifically:
Straight line D obliquely is formed according to the second default slope and the current opening value, is then adjusted according to straight line D small-bore
The aperture of regulating valve, so that its aperture is gradually increased to 100%；
It is described to continue to carry out PID adjusting to the aperture of heavy caliber regulating valve, so that its aperture continues to increase, and continue to big mouth
The aperture of diameter regulating valve carries out PID adjusting, so that the step of its aperture is gradually increased to 100% specifically:
Continued to calculate heavy caliber regulating valve according to the current opening value of the second predetermined process parameter and small-bore regulating valve
The corresponding opening value of various time points and forming curves F since its current aperture, then continue according to curve F to heavy caliber
Control valve opening carries out PID adjusting, so that its aperture is gradually increased until 100%.
5. bivalve Staged cotrol method according to claim 1, which is characterized in that big small-bore regulating valve aperture all
After increasing to 100%, the method also includes following steps:
After the aperture of small-bore regulating valve increases to 100% for the second time, PID adjusting is carried out to the aperture of small-bore regulating valve,
So that its aperture is maintained at 100%,
After the aperture of heavy caliber regulating valve increases to 100%, PID is continued to the aperture of heavy caliber regulating valve and is adjusted, with
Its aperture is set to be maintained at 100%,
Until entire control process terminates, a growth cycle of technique production is completed.
6. bivalve Staged cotrol method according to any one of claims 1-5, which is characterized in that described first is default oblique
The absolute value of rate is equal to two times of the absolute value of the second default slope；And/or the presupposition multiple is 2 times；And/or described
One preset condition has increased to for the aperture of heavy caliber regulating valve and has jumped out its controlling dead error；Second preset condition is osculum
The aperture of diameter regulating valve has been decreased to the aperture minimum of technique permission.
7. a kind of bivalve Staged cotrol device, which is characterized in that the bivalve refers to the adjusting of the different bores of in parallel two
Valve, the biggish regulating valve of medium caliber are heavy caliber regulating valve, and the lesser regulating valve of bore is small-bore regulating valve；
The bivalve Staged cotrol device includes pid control module, Staged cotrol module, first slope control module, and aperture is protected
Module, the second slop control module, small-bore regulating valve control module and heavy caliber regulating valve control module are held,
The pid control module is used under the distribution of Staged cotrol module, by small-bore regulating valve control module to osculum
The aperture of diameter regulating valve carries out PID adjusting, so that its aperture is gradually increased to 100% from zero；
The first slope control module is for exporting the first default slope information to small-bore regulating valve control module, by small
The aperture that bore regulating valve control module controls small-bore regulating valve reduces according to the first default slope, the pid control module
Be also used to the aperture of small-bore regulating valve start reduce while under the distribution of Staged cotrol module, adjusted by heavy caliber
Valve control module carries out PID adjusting to the aperture of heavy caliber regulating valve, so that its aperture is gradually increased from zero, big small-bore adjusting
Valve control module controls the aperture of big small-bore regulating valve respectively until the aperture of heavy caliber regulating valve reaches the first preset condition
Or the aperture of small-bore regulating valve reaches the second preset condition；
The aperture keeps module for exporting the current aperture value information of small-bore regulating valve to small-bore regulating valve control module,
Small-bore regulating valve is controlled by small-bore regulating valve control module and persistently keeps current opening value, and the pid control module is also
For under the distribution of Staged cotrol module, by heavy caliber regulating valve control module continue to the aperture of heavy caliber regulating valve into
Row PID is adjusted, so that its aperture continues to increase, big small-bore regulating valve control module controls opening for big small-bore regulating valve respectively
Degree is until the current control flow of heavy caliber regulating valve reaches the presupposition multiple of small-bore regulating valve maximum control flow；
The second slop control module is for exporting the second default slope information to small-bore regulating valve control module, by small
The aperture that bore regulating valve control module controls small-bore regulating valve increases according to the second default slope, until small-bore regulating valve
Aperture increase to 100%；The pid control module is also used to dividing while the aperture of small-bore regulating valve starts to increase
Under the distribution of process control module, continue to carry out PID tune to the aperture of heavy caliber regulating valve by heavy caliber regulating valve control module
Section, so that its aperture continues to increase, until the aperture of heavy caliber regulating valve also increases to 100%.
8. bivalve Staged cotrol device according to claim 7, which is characterized in that the pid control module is specifically used for,
According to the first predetermined process parameter calculate small-bore regulating valve from aperture be zero to aperture be 100% during various time points
Corresponding opening value and forming curves A, then under the distribution of Staged cotrol module, by small-bore regulating valve control module according to
Curve A carries out PID adjusting to the aperture of small-bore regulating valve, until small-bore control valve opening is gradually increased to 100% from zero.
9. bivalve Staged cotrol device according to claim 7, which is characterized in that
The first slope control module is specifically used for, and forms straight line B obliquely according to the first default slope and exports to small
Bore regulating valve control module, then the aperture of small-bore regulating valve is adjusted by small-bore regulating valve control module according to straight line B,
So that its aperture is gradually reduced since 100%；
The pid control module is specifically also used to, and calculates heavy caliber according to the second predetermined process parameter and the first default slope
The corresponding opening value of various time points of the regulating valve since its aperture is zero and forming curves E, then in Staged cotrol module
Distribution under, PID adjusting is carried out to the aperture of heavy caliber regulating valve according to curve E by heavy caliber regulating valve control module, with
It is gradually increased its aperture from zero.
10. bivalve Staged cotrol device according to claim 7, which is characterized in that
The aperture keeps module to be specifically used for, and forms horizontal straight line C according to the current opening value of small-bore regulating valve and exports
Extremely small-bore regulating valve control module, then small-bore regulating valve is adjusted according to straight line C by small-bore regulating valve control module
Aperture, so that it persistently keeps current opening value；
The second slop control module is specifically used for, and is formed obliquely according to the second default slope and the current opening value
Straight line D is simultaneously exported to small-bore regulating valve control module, then adjusts osculum according to straight line D by small-bore regulating valve control module
The aperture of diameter regulating valve, so that its aperture is gradually increased to 100%；
The pid control module is specifically also used to, according to the described current of the second predetermined process parameter and small-bore regulating valve
Opening value continues to calculate various time points corresponding opening value and forming curves of the heavy caliber regulating valve since its current aperture
F is continued according to curve F to heavy caliber tune then under the distribution of Staged cotrol module by heavy caliber regulating valve control module
It saves valve opening and carries out PID adjusting, so that its aperture continues to increase until 100%.
11. bivalve Staged cotrol device according to claim 7, which is characterized in that the pid control module is also used to,
After the aperture of small-bore regulating valve increases to 100% for the second time, pass through small-bore adjusting under the distribution of Staged cotrol module
Valve control module carries out PID adjusting to the aperture of small-bore regulating valve, so that its aperture is maintained at 100%, and in heavy caliber
After the aperture of regulating valve increases to 100%, by heavy caliber regulating valve control module to big under the distribution of Staged cotrol module
The aperture of bore regulating valve continues PID adjusting, so that its aperture is maintained at 100%, until entire control process terminates, and it is complete
The growth cycle produced at technique.
12. bivalve Staged cotrol device according to any one of claims 7-11, which is characterized in that described first is default
The absolute value of slope is equal to two times of the absolute value of the second default slope；And/or the presupposition multiple is 2 times；And/or it is described
First preset condition has increased to for the aperture of heavy caliber regulating valve and has jumped out its controlling dead error；Second preset condition is small
The aperture of bore regulating valve has been decreased to the aperture minimum of technique permission.
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| CN114060580B (en) * | 2021-11-22 | 2023-10-27 | 中冶南方工程技术有限公司 | Size regulating valve part-way regulating method |
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Application publication date: 20181211 Assignee: Xinte silicon based new materials Co.,Ltd. Assignor: XINTE ENERGY Co.,Ltd. Contract record no.: X2022990000325 Denomination of invention: Double valve split range control method and control device Granted publication date: 20191203 License type: Common License Record date: 20220627 Application publication date: 20181211 Assignee: Inner Mongolia Xinte silicon material Co.,Ltd. Assignor: XINTE ENERGY Co.,Ltd. Contract record no.: X2022990000326 Denomination of invention: Double valve split range control method and control device Granted publication date: 20191203 License type: Common License Record date: 20220627 |