CN109885107A - A kind of method and device thereof for Correction and Control valve discharge coefficient - Google Patents
A kind of method and device thereof for Correction and Control valve discharge coefficient Download PDFInfo
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- CN109885107A CN109885107A CN201910060233.3A CN201910060233A CN109885107A CN 109885107 A CN109885107 A CN 109885107A CN 201910060233 A CN201910060233 A CN 201910060233A CN 109885107 A CN109885107 A CN 109885107A
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Abstract
Method for Correction and Control valve discharge coefficient, comprising: the pipe signal that step 1. passes through the detection device being preset on the first test pipeline two pipelines to be measured；Step 2. is acquired and saves to signal described in step 1；The data that step 3. acquires are stored in modified flow rate coefficient software systems, carry out data processing, obtain flow coefficient k v under each aperture and aperture and level curve figure；Step 4. is according to above-mentioned required data, Correction and Control valve discharge coefficient.The present invention can quickly lose because of discharge coefficient bring in Correction and Control valve discharge coefficient, reduction.The invention also includes the devices for implementing foregoing invention method.
Description
Technical field
The invention belongs to fluid device fields, and in particular to the method and device thereof of Correction and Control valve discharge coefficient.
Background technique
Control valve as the important execution unit in Process Control System, be mainly used to the on-off of fluid in control piper,
Flow direction, flow, pressure and temperature etc..Control valve has in fields such as petroleum, chemical industry, electric power, pharmacy, photovoltaic, nuclear energy
It is widely applied.Wherein, control valve discharge coefficient is the important technological parameter in control valve field and technical indicator, is to guarantee control
The key of valve safe and stable operation.
The discharge coefficient of control valve is the index for measuring control valve negotiability, and discharge coefficient value is bigger, illustrates control valve
Negotiability it is big, pressure loss when fluid flow through valve door is small.Therefore, discharge coefficient is improper, may result in control
Situations such as valve restriction loss is excessive, valve body shakes, control response valve is deteriorated, the final safety for influencing equipment operation, stability
And economy.
Liquid level effect is caused to become currently, occurring as soon as the exception of control valve discharge coefficient in the operation of large nuclear-power unit
Difference, however unexpected emergency shut-down accident will reduce the production run time of nuclear power plant, lead to very huge economic loss.
Therefore the amendment to discharge coefficient, it is ensured that the safety and economy of nuclear power unit operation.
The modification method of existing control valve discharge coefficient be by artificial mode to single control valve discharge coefficient into
Row amendment, however this mode is not very accurately, to need test of many times that could gradually correct；And in makeover process,
Artificial modified uncertainty also increases the risk of discharge coefficient inaccuracy.
Summary of the invention
The present invention will overcome the disadvantages mentioned above of the prior art, provide it is a kind of for Correction and Control valve discharge coefficient method and its
Device, for being modified to control valve discharge coefficient.
A kind of method for Correction and Control valve discharge coefficient of the invention, comprising the following steps:
The pipe signal that step 1. passes through the detection device being preset on the first test pipeline 1 two pipelines to be measured；
Step 2. is acquired and saves to signal described in step 1；
The data that step 3. acquires are stored in modified flow rate coefficient software systems, are carried out data processing, are obtained each open
Flow coefficient k v and aperture and level curve figure under degree；
Step 4. is according to above-mentioned required data, Correction and Control valve discharge coefficient；
Specifically, passing through the pipe of the detection device being preset on the first test pipeline 1 two pipelines to be measured described in step 1
Road signal, comprising:
It is preset at the first control of first pressure detection device PT1 acquisition of 3 import of the first control valve in the first test pipeline 1
The second pressure detection device PT2 acquisition control valve downstream pressure signal of 3 upstream pressure signal P1 of valve and the outlet of the first control valve 3
P2；
The flow detector FT being preset in the first test pipeline 1 acquires the fluid flow signal Q of two pipelines；
The liquid level detection device LT acquisition liquid level signal L being preset on fluid storage device S2；
Step 1 signal is acquired described in step 2, specific steps are as follows: by modified flow rate coefficient software systems
Default 1 module of opening amount signal gives control valve 1 signal, preset opening amount signal be 0,10%, 20%, 30%, 40%, 50%, 60%,
70%, 80%, 90%, 100%；5 standard-sized sheet of shut-off valve on fluid storage device S2 is remained in, the valve under each aperture is acquired
Preceding pressure P1, downstream pressure P2, fluid flow Q and liquid level signal L；
Step 3 pair acquisition data are stored in modified flow rate coefficient software systems, carry out data processing, concrete processing procedure
Are as follows:
Control valve flow coefficient k v is according to formulaIt is calculated, N in formula1For constant 0.1, ρ/ρ0For stream
Body relative density；
According to ideal control valve flow coefficient k v preset in modified flow rate coefficient software systems0, actually surveyed with step 31
The discharge coefficient obtained is compared, and under same aperture, Kv value carries out difference and Δ Kv is calculated；
Δ Kv automatically generates Δ Kv tables of data with opening amount signal described in step 2, software, and the tables of data is as the second control valve
4 preset signals save the second preset signals module in software；
Opening amount signal and liquid level signal L in above-mentioned steps 2 generate the curve graph of aperture and liquid level；
Step 4 Correction and Control valve discharge coefficient, the specific steps are as follows:
First default opening amount signal gives 3 signal of the first control valve, and the second default opening amount signal gives 4 signal of the second control valve,
5 standard-sized sheet of shut-off valve on second fluid storage device S2 is remained in, upstream pressure P1 under each aperture, downstream pressure are acquired
P2, fluid flow Q1 and liquid level signal L；
Control valve flow coefficient k v at this time is calculated according to discharge coefficient formula；
Software automatically generates discharge coefficient tables of data, and tables of data is revised discharge coefficient at this time；
According to liquid level signal L and opening amount signal collected at this time, software systems generate aperture and level curve figure.
In above-mentioned data handling procedure, the control valve upstream pressure P1 calculated, downstream pressure P2, fluid flow are participated in
The data acquired when pipeline stabilization when Q1 and liquid level signal L is operation.Since pipeline fluid is there are wave phenomenon, cause to acquire
Control valve upstream pressure P1, downstream pressure P2, fluid flow Q1 and liquid level signal L can be fluctuated in a certain range in the process, because
This control valve upstream pressure P1, downstream pressure P2, fluid flow Q1 and liquid level signal L take the average value in certain time.
The present invention also provides the devices for implementing a kind of above-mentioned method for Correction and Control valve discharge coefficient, including
One test pipeline 1, second tests pipeline 2, first fluid storage device S1, second fluid storage device S2, signal acquisition and hair
Send device and modified flow rate coefficient software systems；
The first test pipeline 1 includes the first centrifugal pump B1, the first control valve 3, positioned at the of 3 import of the first control valve
One pressure-detecting device PT1, second pressure detection device PT2 and flow detector FT positioned at the outlet of the first control valve 3；
The second test pipeline 2 includes the second centrifugal pump B2 and the second control valve 4；
Positioned at the liquid level detection device LT and shut-off valve 5 of second fluid storage device S2；
Output end, the flow detector of the output end of first pressure detection device PT1, second pressure detection device PT2
FT output end and liquid level detection device LT output end are all connected to signal acquisition and sending device；
Signal acquisition and sending device are the data collection system of National Instruments company, its first is defeated
Outlet OUT1 is connected to the first control valve 3, and second output terminal OUT2 is connected to the second control valve 4, signal acquisition and sending device
Pass through Ethernet both-way communication with modified flow rate coefficient software systems；Modified flow rate coefficient software systems are by 3 He of the first control valve
Second control valve 4 needs the valve position signal that reaches to be sent to signal acquisition and sending device, signal acquisition and sending device according to
The valve position signal of acquisition sends the control signal of 4-20mA to the first control valve 3 and the second control valve 4, adjusts two control valves
Opening size；Modified flow rate coefficient software systems send acquisition signal, signal acquisition and transmission to information collection and sending device
Device receives the signal of above-mentioned detection device acquisition according to the data acquisition command received, and the transmission of the signal of acquisition is returned something for repairs
Positive stream coefficient of discharge software systems.
Modified flow rate coefficient software systems are the software write based on LABVIEW, including data acquisition command sending module,
Output data acquisition to acquisition and sending device；Control valve control of valve position signal setup module, by the control valve valve of setting
Position signal is sent to information collection and sending device；The input terminal connection signal of data storage module acquires and sending device, protects
Deposit the data of above-mentioned detection device acquisition；The input terminal of Data Management Analysis module connects data storage module, data processing point
Analysis module carries out the treatment process of above-mentioned data according to the data of preservation.
In the present apparatus, the first control valve 3 and the second control valve 4 are the flow restriction equipment with intelligent positioner；On
First pressure detection device PT1 of the rheme in 3 import of the first control valve, the second pressure detection positioned at the outlet of the first control valve 3
Device PT2, flow detector FT and liquid level detection device LT installation site in the duct positioned at fluid storage device S2
In strict accordance with national standard GB/T17213.9-2005 regulation enforcement.
The invention has the advantages that quick and precisely Correction and Control valve discharge coefficient, timely guarantee industrial system fortune can be stablized
Row is reduced because equipment stoppage in transit bring is lost.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram of Correction and Control valve discharge coefficient of the invention.
Fig. 2 is Correction and Control valve discharge coefficient software system structure figure of the invention.
Fig. 3 is the structural schematic diagram of control valve control of valve position signaling module of the invention.
Fig. 4 is the structural schematic diagram of Data Management Analysis module of the invention.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in detail, but the invention is not limited to implementation cases described herein
Example.
As shown in Figure 1, implementing the device of the method for Correction and Control valve discharge coefficient of the invention, including the first test
Pipeline 1, second tests pipeline 2, first fluid storage device S1, second fluid storage device S2, signal acquisition and sending device
With modified flow rate coefficient software systems；Wherein the first test pipeline 1 includes the first centrifugal pump B1, the first control valve 3, is located at first
The first pressure detection device PT1 of 3 import of control valve, second pressure detection device PT2 and stream positioned at the outlet of the first control valve 3
Amount detecting device FT；Second test pipeline 2 includes the second centrifugal pump B2 and the second control valve 2；Positioned at second fluid storage device
The liquid level detection device LT and shut-off valve 5 of S2；The output end of first pressure detection device PT1, second pressure detection device PT2
Output end, flow detector FT output end and liquid level detection device LT output end are all connected to signal acquisition and send and fill
It sets；First output end OUT1 of signal acquisition and sending device is connected to the first control valve 3, and second output terminal OUT2 is connected to
Two control valves 4, signal acquisition and sending device and modified flow rate coefficient software systems pass through Ethernet both-way communication；Modified flow rate
First control valve 3 and the second control valve 4 are needed the valve position signal reached to be sent to signal acquisition and send by coefficient software systems
Device, signal acquisition and sending device according to the valve position signal of acquisition send the control signal of 4-20mA to the first control valve 3 and
Second control valve 4, adjusts the opening size of two control valves；Modified flow rate coefficient software systems are to information collection and sending device
It sends acquisition signal, signal acquisition and sending device and above-mentioned detection device acquisition is received according to the data acquisition command received
Signal, and the signal of acquisition is sent back into modified flow rate coefficient software systems.
As shown in Fig. 2, modified flow rate coefficient software systems are the software write based on LABVIEW, including data acquisition life
Enable sending module, output data acquisition to acquisition and sending device；Control valve control of valve position signal setup module, will set
Control valve valve position signal be sent to information collection and sending device；The input terminal connection signal acquisition of data storage module and hair
Device is sent, the data of above-mentioned detection device acquisition are saved；The input terminal of Data Management Analysis module connects data storage module, number
The treatment process of above-mentioned data is carried out according to the data of preservation according to processing analysis module.
As shown in figure 3, control valve control of valve position signaling module is by the first default opening amount signal module and the second default aperture
Signaling module composition, wherein the second default opening amount signal module is provided by Δ Kv.
As shown in figure 4, Data Management Analysis module is by calculating Kv module, default desired flow rate of COEFFICIENT K v0It module and opens
It spends signal and liquid level signal curve module forms, wherein calculating Kv module, default desired flow rate of COEFFICIENT K v0Data in module into
Row takes difference operation to obtain Δ Kv, and it is to be used which is sent to second default opening amount signal module etc..
In a case study on implementation of the invention, the step of method of Correction and Control valve discharge coefficient, includes:
Pass through the pipe signal of the detection device being preset on the first test pipeline 1 two pipelines to be measured；
The pipe signal is acquired and is saved；
The data of acquisition are stored in modified flow rate coefficient software systems, are carried out data processing, are obtained under each aperture
Flow coefficient k v and aperture and level curve figure；
According to above-mentioned required data, Correction and Control valve discharge coefficient；
Specifically, by the pipe signal of the detection device being preset on the first test pipeline 1 two pipelines to be measured, packet
It includes:
It is preset at the first control of first pressure detection device PT1 acquisition of 3 import of the first control valve in the first test pipeline 1
The second pressure detection device PT2 acquisition control valve downstream pressure signal of 3 upstream pressure signal P1 of valve and the outlet of the first control valve 3
P2；
The flow detector FT being preset in the first test pipeline 1 acquires the fluid flow signal Q of two pipelines；
The liquid level detection device LT acquisition liquid level signal L being preset on second fluid storage device S2；
Wherein, the installation site of above-mentioned detection device in the duct is standardized in strict accordance with national standard GB/T 17213.9-2005
It executes.
Above-mentioned signal supervisory instrument is connect with information collection with sending device, carries out the acquisition of data, and passes through ether
Net is connect with modified flow rate coefficient software systems, is saved to its data.
The specific steps being acquired are as follows: given by the first default opening amount signal module in modified flow rate coefficient software systems
First control valve, 3 signal, preset opening amount signal be 0,10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%,
100%；5 standard-sized sheet of shut-off valve on second fluid storage device S2 is remained in, upstream pressure P1, the valve under each aperture are acquired
Pressure P2, fluid flow Q and liquid level signal L afterwards；
Above-mentioned acquisition data are stored in modified flow rate coefficient software systems, carry out data processing, the specific process is as follows:
Control valve flow coefficient k v is according to formulaIt is calculated, N in formula1For constant 0.1, ρ/ρ0For stream
Body relative density；
According to ideal control valve flow coefficient k v preset in modified flow rate coefficient software systems0, actually surveyed with step 31
The discharge coefficient obtained is compared, and under same aperture, Kv value carries out difference and Δ Kv is calculated；
Δ Kv and opening amount signal, software automatically generate Δ Kv tables of data, default letter of the tables of data as the second control valve 4
Number save the second preset signals module in software；
Above-mentioned opening amount signal and liquid level signal L generates the curve graph of aperture and liquid level；
Above-mentioned Correction and Control valve discharge coefficient, the specific steps are as follows:
First default opening amount signal gives 3 signal of the first control valve, and the second default opening amount signal gives 4 signal of the second control valve,
The shut-off valve standard-sized sheet on fluid storage device S2 is remained in, upstream pressure P1, downstream pressure P2, stream under each aperture are acquired
Body flow Q1 and liquid level signal L；
Control valve flow coefficient k v at this time is calculated according to discharge coefficient formula；
Software automatically generates discharge coefficient tables of data, and tables of data is revised discharge coefficient at this time；
According to liquid level signal L and opening amount signal collected at this time, software systems generate aperture and level curve figure.
In above-mentioned data handling procedure, the control valve upstream pressure P1 calculated, downstream pressure P2, fluid flow are participated in
The data acquired when pipeline stabilization when Q1 and liquid level signal L is operation.Since pipeline fluid is there are wave phenomenon, cause to acquire
Control valve upstream pressure P1, downstream pressure P2, fluid flow Q1 and liquid level signal L can be fluctuated in a certain range in the process, because
This control valve upstream pressure P1, downstream pressure P2, fluid flow Q1 and liquid level signal L take the average value in certain time.
In above-mentioned case study on implementation, the procedural order of signal acquisition and data processing is not fixed, acquisition data
It carries out also belonging to one of embodiments of the present invention simultaneously with data processing.
Case content described in this specification is only enumerating to the way of realization of inventive concept, protection scope of the present invention
Also include those skilled in the art conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (5)
1. a kind of method for Correction and Control valve discharge coefficient, includes the following steps:
Pipe signal of the step 1. by the detection device being preset on the first test pipeline (1) two pipelines to be measured, specific packet
It includes:
11. the first pressure detection device PT1 acquisition the of the first control valve (3) import being preset in the first test pipeline (1)
Second pressure detection device (PT2) acquisition control valve of one control valve (3) upstream pressure signal P1 and the first control valve (3) outlet
Downstream pressure signal P2；
12. the fluid flow signal Q that the flow detector FT being preset in the first test pipeline 1 acquires two pipelines；
13. liquid level detection device (LT) the acquisition liquid level signal L being preset on second fluid storage device (S2)；
Step 2. is acquired and saves to signal described in step 1, and the specific steps of the signal acquisition include: to pass through amendment
In discharge coefficient software systems the first default opening amount signal (1) module give the first control valve (3) signal, preset opening amount signal be 0,
10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%；Remain in second fluid storage device
(S2) shut-off valve (5) standard-sized sheet on acquires upstream pressure P1, downstream pressure P2, fluid flow Q and liquid level letter under each aperture
Number L；
The data that step 3. acquires are stored in modified flow rate coefficient software systems, carry out data processing, specific as follows:
Step 31: control valve flow coefficient k v is according to formulaIt is calculated, N in formula1For constant 0.1, ρ/ρ0
For fluid relative density；
Step 32: according to ideal control valve flow coefficient k v preset in modified flow rate coefficient software systems0, practical with step 31
The discharge coefficient measured is compared, and under same aperture, Kv value carries out difference and Δ Kv is calculated；
Step 33: step 32 acquires opening amount signal described in Δ Kv and step 2, and software automatically generates Δ Kv tables of data, the tables of data
Preset signals as the second control valve (4) save the second preset signals module in software；
Step 34: opening amount signal and liquid level signal L in step 2 generate the curve graph of aperture and liquid level, and the curve is not at this time
Ideal curve；
Step 4: according to above-mentioned required data, Correction and Control valve discharge coefficient, the specific steps are as follows:
Step 41: the first default opening amount signal gives the first control valve (3) signal, and the second default opening amount signal gives the second control valve
(4) signal remains in the shut-off valve standard-sized sheet on second fluid storage device (S2), acquires the upstream pressure under each aperture
P1, downstream pressure P2, fluid flow Q1 and liquid level signal L；
Step 42: according to the discharge coefficient formula of step 31, calculating control valve flow coefficient k v；
Step 43: the control valve flow coefficient k v according to required by step 42, software automatically generate discharge coefficient tables of data, count at this time
It is revised discharge coefficient according to table；
Step 44: according to step 41 liquid level signal L collected and opening amount signal, the curve graph of aperture and liquid level is generated, this
When curve be ideal curve.
2. the method for control valve modified flow rate coefficient as described in claim 1, it is characterised in that: above-mentioned steps 21 and step 41
In data handling procedure, the control valve upstream pressure P1 calculated, control valve downstream pressure P2, fluid flow Q, liquid level signal are participated in
L takes the average value in certain time.
3. implement the device of the method for Correction and Control valve discharge coefficient described in claim 1, including the first test pipeline (1),
Second test pipeline (2), first fluid storage device (S1), second fluid storage device (S2), signal acquisition and sending device
With modified flow rate coefficient software systems；
It is described first test pipeline (1) include the first centrifugal pump (B1), the first control valve (3), positioned at the first control valve import
First pressure detection device (PT1), the second pressure detection device (PT2) and flow detection for being located at the first control valve (3) outlet
Device (FT)；
Second test pipeline (2) includes the second centrifugal pump (B2) and the second control valve (4)；
Positioned at the liquid level detection device (LT) and shut-off valve (5) of second fluid storage device (S2)；
Output end, the flow detector of the output end of first pressure detection device (PT1), second pressure detection device (PT2)
(FT) output end and liquid level detection device (LT) output end are all connected to signal acquisition and sending device；
The first output end (OUT1) of signal acquisition and sending device is connected to the control signal input of the first control valve 1, the
Two output ends (OUT2) are connected to the control signal input of the second control valve (2), signal acquisition and sending device and amendment is flowed
Coefficient of discharge software systems pass through Ethernet both-way communication；Modified flow rate coefficient software systems control the first control valve (3) and second
Valve (4) processed needs the valve position signal reached to be sent to signal acquisition and sending device, and signal acquisition and sending device are according to acquisition
Valve position signal send 4-20mA control signal to the first control valve (3) and the second control valve (4), adjust two control valves
Opening size；Modified flow rate coefficient software systems send acquisition signal, signal acquisition and transmission to information collection and sending device
Device according to the data acquisition command that receives receive first pressure detection device (PT1), second pressure detection device (PT2),
The signal that flow detector (FT), liquid level detection device (LT) acquire, and the signal of acquisition is sent back into modified flow rate coefficient
Software systems.
Modified flow rate coefficient software systems are the software write based on LABVIEW, including data acquisition command sending module, output
Data acquisition command to acquisition and sending device；Control valve control of valve position signal setup module believes the control valve valve position of setting
Number it is sent to information collection and sending device；The input terminal connection signal of data storage module acquires and sending device, in preservation
State the data of detection device acquisition；The input terminal of Data Management Analysis module connects data storage module, Data Management Analysis mould
Root tuber carries out the treatment process of above-mentioned data according to the data of preservation.
4. device as claimed in claim 2, it is characterised in that: the first control valve (3) and the second control valve (4) are with intelligence
The flow restriction equipment of locator.
5. device as claimed in claim 2, it is characterised in that: the above-mentioned first pressure inspection for being located at the first control valve (3) import
Second pressure detection device (PT2), flow detector (FT) and the position surveyed device (PT1), be located at the first control valve (3) outlet
In fluid storage device (S2) liquid level detection device (LT) installation site in the duct according to national standard GB/T17213.9-
2005 regulation enforcements.
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