CN105699062B - A kind of valve flow flow resistance test macro and its method for carrying out small micrometeor test - Google Patents
A kind of valve flow flow resistance test macro and its method for carrying out small micrometeor test Download PDFInfo
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- CN105699062B CN105699062B CN201610096522.5A CN201610096522A CN105699062B CN 105699062 B CN105699062 B CN 105699062B CN 201610096522 A CN201610096522 A CN 201610096522A CN 105699062 B CN105699062 B CN 105699062B
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Abstract
A kind of method that the present invention discloses valve flow flow resistance test macro and its carries out small micrometeor test.The system includes by pipeline successively along water tank even, water pump, pressurizing vessel, water collector I, water segregator, water collector II, back pressure regulating valve.Water collector I is connected in parallel to each other by more and the flow measurement pipeline of different tube diameters is connected with water segregator, and flow tube road is separately installed with the flowmeter of different bores；Water segregator then passes through more and is connected in parallel to each other and the valves test pipeline of different tube diameters is connected with water collector II, and the measured valve of different bores is separately installed on valves test pipeline；It is connected on the water collector II or pipeline in II downstream of water collector convenient for the weighing device of the small micrometeor of Accurate Determining.This system negotiability can calculate gained according to Bernoulli equation according to measurement pressure difference；Flow resistance coefficient is calculated according to measured values such as flow velocity, pressure differences, can accurately measure it is various under the conditions of measured valve negotiability and flow resistance coefficient.
Description
Technical field
The invention belongs to flow measurement technology fields, and in particular to a kind of valve flow flow resistance test macro and small micrometeor
Measurement method.
Background technique
Valve is a kind of fluid control elements having a large capacity and a wide range, and is the most resistance elements of quantity in process industry.Valve
The negotiability and flow resistance coefficient of door are the main performances except valve intensity and sealing performance, while being also process system design
The factor that must be taken into consideration when department's selection power device (such as pump or compressor).The size of valve negotiability and flow resistance coefficient
Mainly obtained by experimental rig measurement.Scientific and reasonable contrived experiment device is accurate measurement negotiability and flow resistance coefficient
Premise, but under certain extreme conditions, such as large scale small guide vane, the prior art is directed to the essence under the conditions of small micrometeor not yet
Locating tab assembly technology.
Therefore, it is urgent to provide a kind of valve flow flow resistance tests for being able to carry out small micro-flow measurement by those skilled in the art
System and its method for carrying out small micrometeor test.
Summary of the invention
In view of the above deficiencies, the present invention provides a kind of valve flow flow resistance test systems for being able to carry out small micro-flow measurement
The method for uniting and its carrying out small micrometeor test.This measuring system is mainly using incompressible water as test(ing) medium, circulation
Ability can calculate gained according to Bernoulli equation according to measurement pressure difference；Flow resistance coefficient is calculated according to measured values such as flow velocity, pressure differences
Out.The system have the characteristics that it is modular, can accurately measure it is various under the conditions of measured valve negotiability and flow resistance coefficient.
A kind of valve flow flow resistance test macro is provided one of to achieve the above object, present invention employs following technical sides
Case:
A kind of valve flow flow resistance test macro, the system include flowed through along medium pipeline successively along even water tank,
Water pump, water collector I, the water collector I is connected in parallel to each other by more and the flow measurement pipeline of different tube diameters is connected with water segregator
It connects, the flow tube road is separately installed with the flowmeter of different bores；The water segregator then passes through more and is connected in parallel to each other
And the valves test pipeline of different tube diameters is connected with water collector II, the valves test pipeline is straight pipe, and valves test
The measured valve of different bores is separately installed on pipeline；Connect on the water collector II or pipeline in II downstream of water collector
It is connected to the weighing device convenient for the small micrometeor of Accurate Determining；It is arranged in the inlet ductwork and/or export pipeline of the water collector II
There is back pressure regulating valve.
Preferably, setting is there are three pressure-measuring-point on the valves test pipeline, i.e. respectively first pressure measuring point, second
Pressure-measuring-point and third pressure-measuring-point, the first pressure measuring point and second pressure measuring point set up separately in the two sides of measured valve, the
The side of the separate measured valve of second pressure measuring point, and first pressure measuring point and second pressure measuring point is arranged in three pressure-measuring-points
Between length of pipe L2 of the length of pipe L1 between second pressure measuring point and third pressure-measuring-point and measured valve length it
With.
Preferably, the flowmeter, weighing device, pressure-measuring-point data output end be connected with data collector, data
The output end of collector is connected with computer.
Preferably, the water collector I, water segregator, interface for extending pipeline is correspondingly arranged on water collector II；Institute
The water outlet for stating water tank is provided with interface for extending water pump.
Preferably, pressurizing vessel is also connected on the pipeline between the water pump and water collector I.
Preferably, the exit of the water pump is provided with the bypassing reflux stream pipeline for carrying out partial discharge adjusting.
Included the following steps: using the method that the system carries out the test of flow flow resistance
S1, starting water pump carry out flow adjusting by the bypassing reflux stream pipeline of exit of pump, and medium enters pressurizing vessel,
Pressure enters water collector I after stablizing；
After S2, medium enter flow measurement pipeline, selection with to measurement of discharge it is compatible one or more flowmeters group
It closes, makes to keep it turned on to the pipeline where the compatible one or more flowmeters of measurement of discharge, and close other flows
Measure pipeline；Medium flows through after flow measurement obtains flow Q value, into water segregator；
S3, make measured valve where valves test pipeline keep it turned on, close other valves test pipelines, medium
Enter water collector II after flowing through measured valve；When valves test pipeline where flowing through measured valve in medium, system passes through pressure
Power measuring point carries out the measurement of forefront pressure, rear end pressure and pressure difference to measured valve；
S4, by the pressure difference before and after backpressure regulation valve regulation measured valve, multi-group data is measured under different pressure differences, and count
The average value of multiple measured valve pressure difference is calculated as measured valve pressure differential deltap p value；Medium back flow realizes medium to water tank later
Circulate operation；
Collected data input computer is carried out calculation processing, automatically derived negotiability Cv by S5, data collector
The flow resistance coefficient ζ value of measured valve and the flow resistance curve changed with measured valve aperture under value or Kv value and different opening.
The measured valve pressure differential deltap p value such as following formula:
Δ p=Δ p1- Δ p2
Wherein:
Pressure difference value of the Δ p1 between first pressure measuring point and second pressure measuring point；
Pressure difference value of the Δ p1 between second pressure measuring point and third pressure-measuring-point.
It is a kind of using the small miniflow measurement of said valve flow flow resistance test macro progress the second object of the present invention is to provide
The method of examination specifically includes following testing procedure that is, under the extreme case of small micrometeor or big valve small guide vane:
S1, starting water pump carry out flow adjusting by the bypassing reflux stream pipeline of exit of pump, and medium enters pressurizing vessel,
Pressure enters water collector I after stablizing；
After S2, medium enter flow measurement pipeline, the flow measurement pipeline where the flowmeter of minimum discharge is selected, this is made
Flow measurement pipeline where the flowmeter of minimum discharge is kept it turned on, and closes other flow measurement pipelines；Medium flow field
After the flow measurement of this minimum discharge obtains flow Q1 value, into water segregator；
S3, make large bore valves i.e. measured valve where valves test pipeline keep it turned on, close other valves
Pipeline is tested, medium enters water collector II after flowing through measured valve；Valves test pipeline where flowing through measured valve in medium
When, system carries out the measurement of forefront pressure, rear end pressure and pressure difference by pressure-measuring-point to measured valve；Flow through water collector II
Medium cut weighing device, weighing device timing weigh with the small micrometeor Q2 value of Accurate Determining；
S4, by the pressure difference before and after backpressure regulation valve regulation measured valve, multi-group data is measured under different pressure differences, and count
The average value of multiple measured valve pressure difference is calculated as measured valve pressure differential deltap p value；Medium back flow realizes medium to water tank later
Circulate operation；
Collected data input computer is carried out calculation processing, automatically derived negotiability Cv by S5, data collector
The flow resistance coefficient ζ value of measured valve and the flow resistance curve changed with measured valve aperture under value or Kv value and different opening；
When computer carries out calculation processing, small micrometeor Q2 value that weighing device measurement obtains as calculating valve pressure differential deltap p value according to
According to value, and flow Q1 value measured by the flowmeter of minimum discharge is as measuring accuracy check value.
The measured valve pressure differential deltap p value such as following formula:
Δ p=Δ p1- Δ p2
Wherein:
Pressure difference value of the Δ p1 between first pressure measuring point and second pressure measuring point；
Pressure difference value of the Δ p1 between second pressure measuring point and third pressure-measuring-point.
The beneficial effects of the present invention are:
1), the present invention using incompressible water as test(ing) medium, be arranged between water collector I and water segregator more that
The flowmeter of different ranges is respectively set in this in parallel and different tube diameters flow measurement pipeline, each flow tube road；This
More are also arranged between water segregator and water collector II and is connected in parallel to each other and the valves test pipeline of different tube diameters for invention, every valve
Developmental tube road is separately installed with the measured valves of different bores, the present invention and on valves test pipeline along its length successively
Three pressure-measuring-points are set.
When need under the different operating conditions of measured valve negotiability Cv value or Kv value measure when, first selection with
To the combination of the compatible flowmeter of measurement of discharge or multiple flowmeters, the purpose of this way is to improve stream as far as possible
The accuracy and accuracy of measurement, and make with to the pipeline where the compatible flowmeter of measurement of discharge or multiple flowmeters
It keeps it turned on, and closes other flow measurement pipelines；Medium, which flows through this flowmeter or multiple flow measurements, to flow
After measuring Q value, then enter by water segregator valves test pipeline (other valves tests at this time where need measured valve to be tested
Pipeline is in close state by valve), medium most returns to water tank through water collector II afterwards；Medium flows through where measured valve
When valves test pipeline, system carries out forefront pressure, rear end pressure and pressure difference to measured valve by three pressure-measuring-points
Accurate measurement.
It can be seen from the above, due to being provided with water segregator between water collector I and water collector II, so that the present invention was measuring
The flow measurement pipeline and valves test pipeline opened in journey are not necessarily one-to-one, but according to uninterrupted into
Row selection, for example it is likely to be the corresponding valves test pipeline of a flow measurement pipeline, it is also possible to it is two flows
Measure the corresponding valves test pipeline of pipeline.Certainly, in the feelings of the corresponding valves test pipeline of a plurality of flow measurement pipeline
Under condition, need by adjust every flow tube road cut-off valve opening come so that corresponding discharge measurement pipe road flow
Meter is in optimum measurement accuracy rating.
Negotiability can calculate gained according to Bernoulli equation according to the pressure differential deltap p of measurement；Flow resistance coefficient is according to flow velocity u
The flow Q value that (flow velocity u is obtained by flow divided by internal diameter of the pipeline sectional area), pressure differential deltap p and flow measurement obtain is calculated by formula
Out；Thus the present invention can accurately measure the negotiability Cv value or Kv value of valve, wherein Cv=Q* (ρ/Δ p)0.5, Cv=
1.167Kv and flow resistance coefficient ζ value, wherein Δ p=ζ u2ρ/2 provide reliable guidance for industrial application.
2), the present invention is provided with three pressure-measuring-points of sequence arrangement on valves test pipeline, so as to accurately
Measured valve pressure differential deltap p value is measured, the accuracy of measurement and accuracy of this system are improved.
3), the present invention, which is especially applicable under the extreme case of small micrometeor or big valve small guide vane, carries out negotiability
The medium for flowing through water collector II is cut into weighing device, by entrance in that case with the accurate measurement of flow resistance coefficient
Medium in weighing device carries out timing weighing, can the small micrometeor Q2 value of Accurate Determining, while the flowmeter institute of minimum discharge
The flow Q1 value measured is as measuring accuracy check value, and data collector is by collected data rate u, pressure differential deltap p and Q1, Q2
The input computer such as value carries out calculation processing, the stream of automatically derived negotiability Cv value or Kv value and different opening lower valve
Resistance coefficient and the flow resistance curve changed with valve opening.
4), the present invention is correspondingly arranged the interface for extending pipeline on water collector I, water segregator, water collector II, according to
Actual needs adds the test pipeline for adapting to different valves and valve opening, so that this pilot system application prospect is more extensive.
Detailed description of the invention
Fig. 1 is structure schematic diagram of the invention.
Fig. 2 is the schematic diagram of present invention flow of media state when carrying out the test of small micrometeor.
The meaning of label symbol is as follows in figure:
1- water tank 2- water pump 21- bypassing reflux stream pipeline 3- pressurizing vessel 4- water collector I
5- flow measurement pipeline 51- flowmeter 6- water segregator 7- valves test pipeline
71- measured valve 72- pressure-measuring-point 721- first pressure measuring point
722- second pressure measuring point 723- third pressure-measuring-point 8- water collector II
9- back pressure regulating valve 10- weighing device
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in the present invention
It states.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Measured valve 71 in Fig. 1 and is not drawn into the present invention, gives table with the empty portion in Fig. 1 between pressure-measuring-point 72
Show；Though and do not make an explanation in text, control medium is equipped in the present invention in flow measurement pipeline and valves test pipeline stream
Logical switch valve or shut-off valve.
A kind of valve flow flow resistance test macro
As shown in Figure 1, the system include by pipeline successively along even water tank 1, water pump 2, pressurizing vessel 3, water collector I 4,
Water segregator 6, water collector II 8, back pressure regulating valve 9, the exit of the water pump 2 are provided with the bypass for carrying out flow adjusting and return
Flow tube road 21.The water collector I 4, water segregator 6 are correspondingly arranged interface for extending pipeline on water collector II 8.It needs
Bright, back pressure regulating valve 9 has setting in the inlet ductwork of water collector II 8 and export pipeline.
The water collector I 4 is connected in parallel to each other by more and the flow measurement pipeline 5 of different tube diameters is connected with water segregator 6,
The flowmeter 51 of different bores is separately installed on the flow measurement pipeline 5；The water segregator 6 is then connected in parallel to each other by more
And the valves test pipeline 7 of different tube diameters is connected with water collector II 8, the valves test pipeline 7 is straight pipe, and valve tries
Test the measured valve 71 (as shown in Figure 2) that different bores are separately installed on pipeline 7；The water collector II 8 or in catchmenting
It is connected on the pipeline in II 8 downstream of device convenient for the weighing device 10 of the small micrometeor of Accurate Determining.
The flowmeter 5, weighing device 10, first pressure measuring point 721, second pressure measuring point 722 and third pressure-measuring-point
723 data output end is connected with data collector, and the data of data collector export to computer and carry out data calculating.
As shown in Fig. 2, there are three pressure-measuring-points 72 for setting on the valves test pipeline 7, i.e., respectively first pressure is surveyed
Point 721, second pressure measuring point 722 and third pressure-measuring-point 723, the first pressure measuring point 721 and second pressure measuring point 722 divide
The two sides of measured valve 71 are located at, the one of the separate measured valve 71 of second pressure measuring point 722 is arranged in third pressure-measuring-point 723
Side, and the length of pipe L1 between first pressure measuring point 721 and second pressure measuring point 722 is second pressure measuring point 722 and third
The sum of the length of length of pipe L2 and measured valve 71 between pressure-measuring-point 723.
Set the length of measured valve 71 even as L3, then L2=L1-L3.
The measured valve pressure differential deltap p value such as following formula:
Δ p=Δ p1- Δ p2
Wherein:
Pressure difference value of the Δ p1 between first pressure measuring point 721 and second pressure measuring point 722；
Pressure difference value of the Δ p1 between second pressure measuring point 722 and third pressure-measuring-point 723.
When carrying out the test of traditional valve flow flow resistance using the system, specifically comprise the following steps:
S1, starting water pump 2 carry out flow adjusting by the bypassing reflux stream pipeline 21 that water pump 2 exports, and medium enters pressure stabilizing appearance
Device 3, pressure enter water collector I 4 after stablizing；
After S2, medium enter flow measurement pipeline 5, selection with to measurement of discharge it is compatible one or more flowmeters group
It closes, makes to keep it turned on to the pipeline where the compatible one or more flowmeters of measurement of discharge, and close other flows
Measure pipeline 5；Medium flows through after flowmeter 51 measures flow Q value, into water segregator 6；
S3, the valves test pipeline 7 at 71 place of measured valve is kept it turned on, closes other valves test pipelines 7,
Medium enters water collector II 8 after flowing through measured valve 71；When medium flows through the valves test pipeline 7 at 71 place of measured valve,
System carries out the measurement of forefront pressure, rear end pressure and pressure difference by pressure-measuring-point 72 to measured valve 71；
S4, the pressure difference that 71 front and back of measured valve is adjusted by back pressure regulating valve 9, measure multi-group data under different pressure differences,
And the average value of multiple measured valve pressure difference is calculated as measured valve pressure differential deltap p value；Medium back flow is realized to water tank 1 later
The circulate operation of medium；
Collected data input computer is carried out calculation processing, automatically derived negotiability Cv by S5, data collector
Value or Kv value, wherein Cv=Q* (ρ/Δ p)0.5, Cv=1.167Kv and different opening lower valve flow resistance coefficient ζ value (Δ p
=ζ u2ρ/2) and the flow resistance curve that changes with valve opening.
A method of small micrometeor test is carried out using above-mentioned valve flow flow resistance test macro
As shown in Figure 1, 2, under the extreme case of small micrometeor or big valve small guide vane, following test step is specifically included
It is rapid:
S1, starting water pump 2 carry out flow adjusting by the bypassing reflux stream pipeline 21 that water pump 2 exports, and medium enters pressure stabilizing appearance
Device 3, pressure enter water collector I 4 after stablizing；
After S2, medium enter flow measurement pipeline 5, the flow measurement pipeline 5 where the flowmeter of minimum discharge is selected, is made
Flow measurement pipeline 5 where the flowmeter of this minimum discharge is kept it turned on, and closes other flow measurement pipelines 5；It is situated between
Mass flow is after the flow measurement of this minimum discharge obtains flow Q1 value, into water segregator 6；
S3, valves test pipeline 7 of the large bore valves i.e. where measured valve 71 is kept it turned on, closes other valves
Door test pipeline 7, medium enter water collector II 8 after flowing through measured valve 71；Valve where flowing through measured valve 71 in medium
When testing pipeline 7, system carries out the survey of forefront pressure, rear end pressure and pressure difference by pressure-measuring-point 72 to measured valve 71
Amount；The medium incision weighing device 10 of water collector II 8 is flowed through, 10 timing of weighing device is weighed with the small micrometeor Q2 of Accurate Determining
Value；
The measured valve pressure differential deltap p value such as following formula:
Δ p=Δ p1- Δ p2
Wherein:
Pressure difference value of the Δ p1 between first pressure measuring point 721 and second pressure measuring point 722；
Pressure difference value of the Δ p1 between second pressure measuring point 722 and third pressure-measuring-point 723.
S4, the pressure difference that 71 front and back of measured valve is adjusted by back pressure regulating valve 9, measure multi-group data under different pressure differences,
And the average value of multiple measured valve pressure difference is calculated as measured valve pressure differential deltap p value；Medium back flow is realized to water tank 1 later
The circulate operation of medium；
S5, data collector count the input computer such as collected data, that is, flow velocity u, pressure differential deltap p and Q1, Q2 value
Calculation is handled, automatically derived negotiability Cv value or Kv value, wherein Cv=Q* (ρ/Δ p)0.5, Cv=1.167Kv and difference open
Spend flow resistance coefficient ζ value (the Δ p=ζ u of lower valve2ρ/2) and the flow resistance curve that changes with valve opening；Computer is calculated
When processing, foundation value of the small micrometeor Q2 value that the measurement of weighing device 10 obtains as calculating valve pressure differential deltap p value, and minimum stream
Flow Q1 value measured by the flowmeter of amount is as measuring accuracy check value.
The so-called foundation value for calculating valve pressure differential deltap p value, is the flow weighed by 10 timing of weighing device
Value is the most accurate, therefore when calculating valve flow flow resistance, measures obtained small micrometeor with weighing device 10
Q2 value is as substitution calculated value.
And for measuring accuracy check value, for example, when the small micrometeor Q2 value and minimum stream that weighing device 10 measures
When flow Q1 value error measured by the flowmeter of amount is no more than 0.2%, then the measuring accuracy of this flowmeter is 0.2 grade.
Claims (4)
1. a kind of method that valve flow flow resistance test macro carries out small micrometeor test, it is characterised in that: the valve flow
Flow resistance test macro includes that pipeline is flowed through along medium successively along water tank (1) even, water pump (2), water collector I (4), the collection
Hydrophone I (4) is connected in parallel to each other by more and the flow measurement pipeline (5) of different tube diameters is connected with water segregator (6), the flow
Measurement pipe road is separately installed with the flowmeter (51) of different bores；The water segregator (6) is then connected in parallel to each other and not by more
Valves test pipeline (7) with caliber is connected with water collector II (8), and the valves test pipeline (7) is straight pipe, and valve
The measured valve (71) of different bores is separately installed in test pipeline (7)；The water collector II (8) is in water collector II
(8) weighing device (10) convenient for the small micrometeor of Accurate Determining is connected on the pipeline in downstream；The import of the water collector II (8)
Back pressure regulating valve (9) are provided on pipeline and/or export pipeline；
Setting is there are three pressure-measuring-point (72) on the valves test pipeline (7), i.e. respectively first pressure measuring point (721), the
Two pressure-measuring-points (722) and third pressure-measuring-point (723), the first pressure measuring point (721) and second pressure measuring point (722) point
The two sides of measured valve (71) are located at, the separate measured valve in second pressure measuring point (722) is arranged in third pressure-measuring-point (723)
(71) side, and the length of pipe L1 between first pressure measuring point (721) and second pressure measuring point (722) is second pressure survey
The sum of length of pipe L2 and measured valve (71) length between point (722) and third pressure-measuring-point (723)；
The flowmeter (5), weighing device (10), pressure-measuring-point (72) data output end be connected with data collector, data
The output end of collector is connected with computer；
Pressurizing vessel (3) are also connected on pipeline between the water pump (2) and water collector I (4)；
The exit of the water pump (2) is provided with the bypassing reflux stream pipeline (21) for carrying out partial discharge adjusting；
It is characterized in that, specifically including following testing procedure under the extreme case of small micrometeor or big valve small guide vane:
S1, starting water pump (2) carry out flow adjusting by the bypassing reflux stream pipeline (21) that water pump (2) export, and medium enters pressure stabilizing
Container (3), pressure enter water collector I (4) after stablizing；
After S2, medium enter flow measurement pipeline (5), the flow measurement pipeline (5) where the flowmeter of minimum discharge is selected, is made
Flow measurement pipeline (5) where the flowmeter of this minimum discharge is kept it turned on, and closes other flow measurement pipelines
(5)；After the flow measurement that medium flows through this minimum discharge obtains flow Q1 value, into water segregator (6)；
S3, make large bore valves i.e. measured valve (71) where valves test pipeline (7) keep it turned on, close other valves
Door test pipeline (7), medium flow through measured valve (71) and enter water collector II (8) afterwards；Measured valve (71) institute is flowed through in medium
Valves test pipeline (7) when, system by pressure-measuring-point (72) to measured valve (71) carry out forefront pressure, rear end pressure
And the measurement of pressure difference；Medium incision weighing device (10) of water collector II (8) is flowed through, weighing device (10) timing is weighed with standard
Really measure small micrometeor Q2 value；
S4, by back pressure regulating valve (9) adjust measured valve (71) before and after pressure difference, measure multi-group data under different pressure differences,
And the average value of multiple measured valve pressure difference is calculated as measured valve pressure differential deltap p value；Medium back flow is real to water tank (1) later
The circulate operation of existing medium；
S5, data collector by collected data input computer carry out calculation processing, automatically derived negotiability Cv value or
The flow resistance coefficient ζ value of measured valve and the flow resistance curve changed with measured valve aperture under Kv value and different opening；It calculates
When machine carries out calculation processing, weighing device (10) the obtained small micrometeor Q2 value of measurement as calculating valve pressure differential deltap p value according to
According to value, and flow Q1 value measured by the flowmeter of minimum discharge is as measuring accuracy check value.
2. the method for small micrometeor test according to claim 1, it is characterised in that: the water collector I (4), water segregator
(6), the interface for extending pipeline is correspondingly arranged on water collector II (8)；The water outlet of the water tank (1), which is provided with, to be used for
Extend the interface of water pump.
3. the method for small micrometeor test according to claim 1, it is characterised in that surveyed using the valve flow flow resistance
The method that test system carries out the test of flow flow resistance includes the following steps:
S1, starting water pump (2) carry out flow adjusting by the bypassing reflux stream pipeline (21) that water pump (2) export, and medium enters pressure stabilizing
Container (3), pressure enter water collector I (4) after stablizing；
After S2, medium enter flow measurement pipeline (5), selection with to measurement of discharge it is compatible one or more flowmeters group
It closes, makes to keep it turned on to the pipeline where the compatible one or more flowmeters of measurement of discharge, and close other flows
It measures pipeline (5)；Medium flows through after flowmeter (51) measures flow Q value, into water segregator (6)；
S3, make measured valve (71) where valves test pipeline (7) keep it turned on, close other valves test pipelines
(7), medium flows through measured valve (71) afterwards into water collector II (8)；Valve examination where flowing through measured valve (71) in medium
When testing pipeline (7), system carries out forefront pressure, rear end pressure and pressure difference to measured valve (71) by pressure-measuring-point (72)
Measurement；
S4, by back pressure regulating valve (9) adjust measured valve (71) before and after pressure difference, measure multi-group data under different pressure differences,
And the average value of multiple measured valve pressure difference is calculated as measured valve pressure differential deltap p value；Medium back flow is real to water tank (1) later
The circulate operation of existing medium；
S5, data collector by collected data input computer carry out calculation processing, automatically derived negotiability Cv value or
The flow resistance coefficient ζ value of measured valve and the flow resistance curve changed with measured valve aperture under Kv value and different opening.
4. the method for small micrometeor test according to claim 1 or 3, it is characterised in that: measured valve pressure differential deltap p value is such as
Following formula:
Δ p=Δ p1- Δ p2
Wherein:
Pressure difference value of the Δ p1 between first pressure measuring point (721) and second pressure measuring point (722)；
Pressure difference value of the Δ p1 between second pressure measuring point (722) and third pressure-measuring-point (723).
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| CN201610096522.5A CN105699062B (en) | 2016-02-22 | 2016-02-22 | A kind of valve flow flow resistance test macro and its method for carrying out small micrometeor test |
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| CN106568574A (en) * | 2016-11-11 | 2017-04-19 | 菏泽海诺知识产权服务有限公司 | Hydraulic friction loss automatic testing device for water flow indicator for fire extinguishing system |
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| KR101217994B1 (en) * | 2010-12-30 | 2013-01-21 | 한국해양과학기술원 | experimental device for safety analysis of by-pass pipeline transport process in CO2 marine geological storage |
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| CN201965019U (en) * | 2011-01-25 | 2011-09-07 | 卓旦春 | Valve integrated testing system |
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