CN103674541A - Method for testing performance of differential pressure valve - Google Patents
Method for testing performance of differential pressure valve Download PDFInfo
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- CN103674541A CN103674541A CN201310754776.8A CN201310754776A CN103674541A CN 103674541 A CN103674541 A CN 103674541A CN 201310754776 A CN201310754776 A CN 201310754776A CN 103674541 A CN103674541 A CN 103674541A
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Abstract
The invention provides a method for testing performance of a differential pressure valve, and belongs to the technical field of differential pressure valve detection. The problem that the performance test of the differential pressure valve is not accurate enough is solved by the method provided by the invention. The method for testing the performance of the differential pressure valve comprises the following main steps: A, determining and computing a flow range under the control differential pressure of the to-be-tested differential pressure valve, determining and computing a differential pressure valve operating differential pressure range which corresponds to each control differential pressure value of the to-be-tested differential pressure valve, and determining an operating differential pressure test value and a flow test valve under each control differential pressure value deltaP of the to-be-tested differential pressure valve; B, measuring the system control differential pressure of a corresponding flow test value and differential pressure valve operating differential pressure test value at the section of each control differential pressure value deltaP of the differential pressure valve; C, computing the relative error of the measured system control differential pressure; D, judging the performance of the differential pressure valve. According to the method provided by the invention, according to the fact that when flow changes, the pressure drop of a pipe line is changed, and the control differential pressure is also changed, the performance of the differential pressure valve is accurately evaluated by computing the relative error of the control differential pressure.
Description
Technical field
The invention belongs to valve for pressure difference detection technique field, relate to a kind of valve for pressure difference performance test methods.
Background technology
Valve for pressure difference full name is self-balanced differential pressure valve, and it does not need the external energy, relies on and is adjusted the variation of medium self pressure to automatically adjust, and automatically eliminates the residual head of pipeline and the flow deviation that pressure surge causes, constant user's inlet outlet pressure differential.Valve for pressure difference is specially adapted in household metering or automatic control system, contributes to systems stabilisation operation.The current application of valve for pressure difference is very extensive, in the systems such as factory, the heating of building family even, air-conditioning, all can have application very widely.The application of valve for pressure difference can reduce the investment that supplementary energy equipment is controlled in a large amount of being applied to.The performance of valve for pressure difference is complete great meaning in actual quoting.And be to detect valve for pressure difference in system, can effectively apply with the application efficiency playing whether meet industry standard for the performance measurement of valve for pressure difference in system.The judgement of the practical application of valve for pressure difference and follow-up adjustment are all had to meaning very much.
Chinese patent literature discloses test board and the detection method thereof of a kind of SMART FLUID operation valve that application number is 201110457685.9.The method is within the scope of 0-100% valve opening, and Yi5%Wei unit etc. set up check point separately; By PLC controller system, control tested valve opening, at each check point, record flow value Q, the resulting pressure difference Δ of the valve two ends differential pressure pickup P that electromagnetic flowmeter obtains more; According to calculated with mathematical model, go out corresponding coefficient of flow under the different valve openings of each check point, and compare and get difference with the measured resulting flow value of electromagnetic flowmeter, choose that control accuracy as tested valve maximum in all differences.This detection method is test pressure differential valve performance to a certain extent, but the method is independent, considered the impact of valve opening for coefficient of flow, do not consider that test valve corresponding pressure-drop in pipeline when system pipeline fluctuations in discharge is changing, valve for pressure difference pressure reduction is also changing.Therefore this method of testing is for also inapplicable in accurate assessment valve precision.
Summary of the invention
The present invention is directed to existing technology and have the problems referred to above, proposed a kind of valve for pressure difference performance test methods, when the method changes according to flow, pressure-drop in pipeline is changing, control pressure reduction and also changing, by calculating relative error, carry out precise evaluation valve for pressure difference performance.
The present invention realizes by following technical proposal: a kind of valve for pressure difference performance test methods, it is characterized in that, and key step is as follows:
A, determine that each tested valve for pressure difference controls tested operting differential pressure test value and flow rate test value under pressure difference Δ P:
Determine that tested valve for pressure difference controls flow range under pressure difference and corresponding valve for pressure difference operting differential pressure scope; Each tested valve for pressure difference is controlled pressure difference Δ P section, corresponding valve for pressure difference control pressure reduction section within the scope of the tested valve for pressure difference operting differential pressure of correspondence, evenly chooses some operting differential pressure test values and corresponding tested valve for pressure difference control pressure reduction section is evenly chosen some flow rate test values in flow range, described some operting differential pressure test values at least comprise minimum operationg pressure differential and the maximum differential pressure under corresponding tested valve for pressure difference control pressure difference Δ P, and described some flow rate test values comprise minimum flow and the maximum flow under corresponding tested valve for pressure difference control pressure difference Δ P;
B, measure all valve for pressure difference and control the system of the corresponding flow rate test values of pressure difference Δ P section and valve for pressure difference operting differential pressure test value and control pressure reduction:
Each tested valve for pressure difference is controlled pressure difference Δ P section, during setting measurement, above-mentioned valve for pressure difference is controlled the flow rate test value of pressure difference Δ P section correspondence, regulate operting differential pressure test value simultaneously, measure one by one respectively and record each pressure measurement difference limen and control pressure difference Δ P section, all measuring flow test values have respectively all systems that differential manometer is measured to control pressure differential deltap Ps under all operting differential pressure test values, each tested valve for pressure difference is controlled pressure difference Δ P section, at least in maximum flow, measuring system under minimum differntial pressure valve operting differential pressure is controlled pressure reduction and minimum flow, system during maximum differential pressure valve operting differential pressure is controlled pressure differential deltap Ps,
The system of C, computation and measurement is controlled the relative error of pressure reduction: all systems that measure according to each valve for pressure difference control pressure reduction section are controlled the relative error that pressure differential deltap Ps computing systems are controlled pressure reduction;
D, judgement valve for pressure difference performance: the system that each tested valve for pressure difference control pressure differential deltap P section calculates is controlled the relative error T of pressure reduction
Δ Pcompare with established standards value, all systems are controlled the relative error T of pressure reduction
Δ Pbe less than established standards value for normal, and all pressure measurement difference limens of measuring of same tested valve for pressure difference system of controlling pressure differential deltap P section correspondences to control pressure reduction relative error close to each other for excellent.
According to the principle of work of differential pressure valve, this performance test methods is according to the control pressure reduction ability of tested valve for pressure difference self, in corresponding flow range, evenly choose and set flow, simultaneously in the situation that setting flow is constant, regulate valve for pressure difference operting differential pressure, with this, measure corresponding valve for pressure difference and control system control pressure reduction under pressure reduction, system control pressure reduction now at least comprises valve for pressure difference and controls minimum system control pressure reduction and the maximum system control pressure reduction in the flow range that pressure difference is corresponding and within the scope of valve for pressure difference operting differential pressure.When selected valve for pressure difference of measurement is controlled pressure difference, set flow, within the scope of full flow, evenly segmentation is chosen one by one, the flow that during concrete measurement, selected flow section is set is motionless, by gamut, regulate operting differential pressure, measure the changing value that corresponding valve for pressure difference is controlled the system control pressure reduction in the interior valve for pressure difference operting differential pressure of this flow range under pressure difference.Gamut variable flow so one by one, gamut changes operting differential pressure, reaches comprehensive reflection and detects the performance quality that the relative error of controlling pressure reduction under different condition judges tested valve for pressure difference.Thereby the Performance Evaluation that makes valve for pressure difference is more rigorous and accurate.
In above-mentioned valve for pressure difference performance test methods, in described steps A, describedly determine and calculate tested valve for pressure difference and control the flow range under pressure reduction, measure valve for pressure difference flow coefficient k vs: it is full-gear that valve for pressure difference Double-clack is fixed on maximum opening, when valve for pressure difference control pressure difference is controlled at 0.1MPa, the flow that valve for pressure difference is now flow through in measurement is Kvs;
The maximum flow Qmax that determines the corresponding valve for pressure difference control pressure difference of measuring is:
during calculating, △ P is by MPa Conversion of measurement unit WeiBar unit, 1Bar=0.1MPa;
The minimum flow Qmin that determines the corresponding valve for pressure difference control pressure difference of measure is: Qmin=1/R * Qmax;
Wherein, the control pressure difference that △ P is tested valve for pressure difference; R is regulating ratio, and described regulating ratio R is 10.
Here by regulating valve for pressure difference Double-clack, be that pilot valve carries out the setting that valve for pressure difference is controlled pressure reduction, flow when valve for pressure difference is maximum controls pressure reduction 0.1MPa is set, maximum flow coefficient, is definite foundation that provides of the flow range under follow-up corresponding valve for pressure difference control pressure reduction.Here according to formula with to the measurement of Kvs, can calculate flow range corresponding to tested valve for pressure difference control pressure differential deltap P.
In above-mentioned valve for pressure difference performance test methods, in described steps A, determine that tested valve for pressure difference respectively controls the valve for pressure difference operting differential pressure scope that pressure difference is corresponding:
According to the tested valve for pressure difference operting differential pressure of maximum, be: 0.35Mpa～0.3Mpa;
Minimum tested valve for pressure difference operting differential pressure is: equal tested valve for pressure difference and control pressure difference Δ P;
According to aforesaid way, determine and calculate tested valve for pressure difference and respectively control the valve for pressure difference operting differential pressure scope that pressure difference is corresponding.Here for definite tested valve for pressure difference, respectively control the valve for pressure difference operting differential pressure scope that pressure difference is corresponding.
In above-mentioned valve for pressure difference performance test methods, in described steps A, wherein tested valve for pressure difference control pressure differential deltap P be 0.02,0.04,0.06,0.08,0.1}, unit is MPa; Tested valve for pressure difference is controlled flow range corresponding to pressure differential deltap P
corresponding valve for pressure difference operting differential pressure scope be 0.02～0.35,0.04～0.35,0.06～0.35,0.08～0.35,0.1～0.35}.
The control pressure differential deltap P of valve for pressure difference self carries out segmentation according to valve for pressure difference characteristic, makes it possible to full test and controls differential pressure conditions to the valve for pressure difference of each section, makes more closing to reality application of measurement data.Control pressure differential deltap P with above-mentioned valve for pressure difference and determine flow range and valve for pressure difference operting differential pressure scope one to one to control under pressure differential deltap P and determine and choose flow rate test value and valve for pressure difference operting differential pressure test value in valve for pressure difference in corresponding scope.
In above-mentioned valve for pressure difference performance test methods, described definite valve for pressure difference operting differential pressure test value and flow rate test value, by getting intermediate value as valve for pressure difference operting differential pressure measuring basis data between the minimum differntial pressure valve operting differential pressure under the tested valve for pressure difference control of correspondence pressure difference Δ P and maximum differential pressure, describedly in the tested valve for pressure difference of correspondence, control and between minimum flow under pressure difference Δ P and maximum flow, get intermediate value and do Flow datum measurement data
Wherein, 1. regulate the pilot valve of valve for pressure difference to make tested valve for pressure difference control pressure difference in corresponding Δ P section;
2. on regulating system pipeline, corresponding pressure regulator valve is set flow and is reached corresponding flow rate test value;
3. on regulating system pipeline, corresponding variable valve regulates valve for pressure difference operting differential pressure to reach corresponding valve for pressure difference operting differential pressure.
Here can select easily within the scope of valve for pressure difference operting differential pressure flow rate test value in pressure reduction test value and flow range is evenly comprehensively to choose valve for pressure difference operting differential pressure test value and flow rate test value more accurately.
In above-mentioned valve for pressure difference performance test methods, in described step C, it is characterized in that, the system control pressure reduction actual value Δ Ps calculating arithmetic mean that described each tested valve for pressure difference is controlled the measurement of pressure differential deltap P section obtains Δ Pp, and system is controlled pressure reduction relative error
In above-mentioned valve for pressure difference performance test methods, described in all valve for pressure difference of the tested valve for pressure difference that the calculates system of controlling pressure reduction section correspondence control pressure reduction relative error T
Δ Pmuch smaller than or while being greater than established standards value, adjust flow range and pressure differential range, again measure.When the system finally calculating is controlled pressure reduction relative error T
Δ Pwhile differing greatly from the standard value of setting, the flow range under corresponding valve for pressure difference control pressure reduction and pressure differential range are chosen wrong, after need adjusting, again measure, and guarantee the accuracy of measurement data.
In above-mentioned valve for pressure difference performance test methods, described system is controlled pressure reduction relative error T
Δ Pduring much larger than established standards value, dwindle the upper limit or the lower limit of flow range and valve for pressure difference operting differential pressure scope; System is controlled pressure reduction relative error T
Δ Pduring much smaller than established standards value, expand the upper limit or the lower limit of flow range and valve for pressure difference operting differential pressure scope.In system, control pressure reduction relative error T
Δ Pmuch larger than adjusting flow range when being less than established standards value and valve for pressure difference operting differential pressure scope is contrary process, the measurement result again making can not depart from measurement range, thereby causes excessive error.
In above-mentioned valve for pressure difference performance test methods, in described step F, described established standards value is 7%-8%.Here established standards value is set according to management industry standard or the company standard of valve for pressure difference practicality, for assessment of the quality of valve for pressure difference performance.
In above-mentioned valve for pressure difference performance test methods, flow rate test value, valve for pressure difference operting differential pressure test value, the system control pressure reduction recording and system in the flow range of described valve for pressure difference control pressure reduction section correspondence are controlled pressure reduction relative error and are set up form one to one.By set up form can more intuitive understanding each valve for pressure difference control the corresponding data that detect and measure of pressure reduction section, simultaneously also convenient record shelves, calculate and statistics.
Compared with prior art, this valve for pressure difference performance test methods has the following advantages:
1, the present invention is according to valve for pressure difference principle of work, set the flow that valve for pressure difference control pressure reduction is corresponding and the system that setting valve for pressure difference operting differential pressure is measured each valve for pressure difference control pressure reduction section correspondence and control pressure reduction, and computing system is controlled the relative error of pressure reduction, and the relative error that judges system control pressure reduction is assessed valve for pressure difference performance, this method can measure each flow range and valve for pressure difference operting differential pressure scope of controlling pressure reduction section of valve for pressure difference comprehensively, measurement range is comprehensive, and this performance test methods precision is improved.
2, the present invention controls by each valve for pressure difference the system that pressure reduction section at least measures while being set as flow minimum value and valve for pressure difference operting differential pressure maximal value and controls the controlled pressure reduction maximal value of pressure reduction, simultaneously the controlled pressure reduction minimum value of the control pressure reduction of the measuring system when setting flow maximal value and valve for pressure difference operting differential pressure minimum value.By minimum, measuring the mode of twice thus the most just can calculate system and control pressure reduction relative error.The present invention also has the object of fast detecting valve for pressure difference performance as can be seen here.
Accompanying drawing explanation
Fig. 1 is step block diagram of the present invention;
Fig. 2 is valve for pressure difference performance testing device;
Fig. 3 is that the valve for pressure difference arriving that DN65 valve for pressure difference is for example calculated is controlled the corresponding table of pressure reduction, valve for pressure difference operting differential pressure scope and flow range.
In figure, 1, pressure regulator valve; 2, differential manometer one; 3, valve for pressure difference; 4, differential manometer two; 5, variable valve one; 6, variable valve two; 7, flowmeter
Embodiment
Be below specific embodiments of the invention, and by reference to the accompanying drawings technical scheme of the present invention be further described, but the present invention is not limited to these embodiment.
As Figure 1-3, a kind of valve for pressure difference performance test methods, is characterized in that, key step is as follows:
A, determine and calculate tested valve for pressure difference and control the flow range under pressure reduction:
Measure valve for pressure difference flow coefficient k vs: it is full-gear that valve for pressure difference Double-clack is fixed on maximum opening, when valve for pressure difference control pressure difference is controlled at 0.1MPa, the flow that valve for pressure difference is now flow through in measurement is Kvs.
And have according to the control pressure difference Δ P of the flow coefficient k V of flow value Q, valve for pressure difference and tested valve for pressure difference
relation calculate tested valve for pressure difference and respectively control the flow range that pressure difference is corresponding;
The maximum flow Qmax that determines the corresponding valve for pressure difference control pressure difference of measuring is:
during calculating, △ P is by MPa Conversion of measurement unit WeiBar unit, 1Bar=0.1MPa;
The minimum flow Qmin that determines the corresponding valve for pressure difference control pressure difference of measure is: Qmin=1/R * Qmax;
Wherein, the control pressure difference that △ P is tested valve for pressure difference; R is regulating ratio, and described regulating ratio R gets 10.
Determine and calculate tested valve for pressure difference and respectively control the valve for pressure difference operting differential pressure scope that pressure difference is corresponding:
Wherein tested valve for pressure difference control pressure differential deltap P is that { 0.02,0.04,0.06,0.08,0.1}, unit is MPa.
According to the tested valve for pressure difference operting differential pressure of maximum, be: 0.35Mpa～0.3Mpa;
Minimum tested valve for pressure difference operting differential pressure is: equal tested valve for pressure difference and control pressure difference Δ P;
According to aforesaid way, determine and calculate tested valve for pressure difference and respectively control the valve for pressure difference operting differential pressure scope that pressure difference is corresponding:
Tested valve for pressure difference is controlled flow range corresponding to pressure differential deltap P
corresponding valve for pressure difference operting differential pressure scope be 0.02～0.35,0.04～0.35,0.06～0.35,0.08～0.35,0.1～0.35}.
Fixed each tested valve for pressure difference is controlled tested operting differential pressure test value and flow rate test value under pressure difference Δ P: each tested valve for pressure difference is controlled pressure difference Δ P section, corresponding valve for pressure difference control pressure reduction section within the scope of the tested valve for pressure difference operting differential pressure of correspondence, evenly chooses some operting differential pressure test values and corresponding tested valve for pressure difference control pressure reduction section is evenly chosen some flow rate test values in flow range, described some operting differential pressure test values at least comprise minimum operationg pressure differential and the maximum differential pressure under corresponding tested valve for pressure difference control pressure difference Δ P, described some flow rate test values comprise minimum flow and the maximum flow under corresponding tested valve for pressure difference control pressure difference Δ P,
Definite valve for pressure difference operting differential pressure test value and flow rate test value, by controlling in the tested valve for pressure difference of correspondence between minimum differntial pressure valve operting differential pressure under pressure difference Δ P and maximum differential pressure, get intermediate value as valve for pressure difference operting differential pressure measuring basis data, describedly in the tested valve for pressure difference of correspondence, control and between minimum flow under pressure difference Δ P and maximum flow, get intermediate value and do Flow datum measurement data.
B, measure all valve for pressure difference and control the system of the corresponding flow rate test values of pressure difference Δ P section and valve for pressure difference operting differential pressure test value and control pressure reduction:
Each tested valve for pressure difference is controlled pressure difference Δ P section, during setting measurement, above-mentioned valve for pressure difference is controlled the flow rate test value of pressure difference Δ P section correspondence, regulate operting differential pressure test value simultaneously, measure one by one respectively and record each pressure measurement difference limen and control pressure difference Δ P section, all measurement test values have respectively all systems that differential manometer is measured to control pressure differential deltap Ps under all operting differential pressure test values, each tested valve for pressure difference is controlled pressure difference Δ P section, at least in maximum flow, measuring system under minimum differntial pressure valve operting differential pressure is controlled pressure reduction and minimum flow, system during maximum differential pressure valve operting differential pressure is controlled pressure differential deltap Ps
Wherein, 1. regulate the pilot valve of valve for pressure difference to make tested valve for pressure difference control pressure difference in corresponding Δ P section;
2. on regulating system pipeline, corresponding pressure regulator valve is set flow and is reached corresponding flow rate test value;
3. on regulating system pipeline, corresponding variable valve regulates valve for pressure difference operting differential pressure to reach corresponding valve for pressure difference operting differential pressure;
The system of E, computation and measurement is controlled the relative error of pressure reduction: the system control pressure reduction actual value Δ Ps calculating arithmetic mean that each tested valve for pressure difference is controlled the measurement of pressure differential deltap P section obtains Δ Pp, and system is controlled pressure reduction relative error
Wherein, Δ Psmax is that the maximum system that the system that records under corresponding Δ P is controlled pressure differential deltap Ps is controlled pressure reduction, and Δ Psmax is that minimum system is controlled pressure reduction; According to above-mentioned formula, calculate each tested valve for pressure difference and control the relative error T that pressure differential deltap P section system is controlled pressure reduction
Δ P;
C, judgement valve for pressure difference performance: the system that each tested valve for pressure difference control pressure differential deltap P section calculates is controlled the relative error T of pressure reduction
Δ Pcompare with established standards value, all systems are controlled the relative error T of pressure reduction
Δ Pbe less than established standards value for normal, and all pressure measurement difference limens of measuring of same tested valve for pressure difference system of controlling pressure differential deltap P section correspondences to control pressure reduction relative error close to each other for excellent.Established standards value is 7%-8%.In following examples, have relate to established standards statement with 8% as an example.In real work, can select 7%-8%.
Flow rate test value, valve for pressure difference operting differential pressure test value, the system control pressure reduction recording and system in the flow range of valve for pressure difference control pressure reduction section correspondence are controlled pressure reduction relative error and are set up form one to one.
The all valve for pressure difference of tested valve for pressure difference that calculate are controlled the system of pressure reduction section correspondence and are controlled pressure reduction relative error T
Δ Pmuch smaller than or while being greater than established standards value, adjust flow and pressure differential range, again measure.System is controlled pressure reduction relative error T
Δ Pduring much larger than established standards value, dwindle the upper limit or the lower limit of flow range and valve for pressure difference operting differential pressure scope; System is controlled pressure reduction relative error T
Δ Pduring much smaller than established standards value, expand the upper limit or the lower limit of flow range and valve for pressure difference operting differential pressure scope.
Below exemplifying valve for pressure difference model is comprehensive measuring system control pressure reduction of DN65 and the mode of assessment: if valve for pressure difference in Fig. 23 is as tested valve for pressure difference, its valve for pressure difference performance testing device is as figure, and wherein the Kvs of DN65 valve for pressure difference is 40M
3/ H is known, surveys each valve for pressure difference and controls the variation of pressure reduction section within the scope of valve for pressure difference operting differential pressure and the variation in flow range and determine that system controls the step of pressure reduction relative error:
The pressure difference that the P2-P3 that in figure, differential manometer 24 is measured is ordered is valve for pressure difference operting differential pressure: act on operation valve two ends, make operation valve can normally realize the pressure reduction that pressure reduction is controlled function.
The pressure difference that the P1-P2 that differential manometer 1 is measured is ordered is that system is controlled pressure reduction: under the control action of operation valve, and the pressure reduction of controlled loop.
The Kvs of DN65 valve for pressure difference of take is 40M
3/ H the valve for pressure difference arriving that to be example calculate according to above-mentioned formula is controlled pressure reduction, valve for pressure difference operting differential pressure scope and flow range result as shown in Figure 3, and in Fig. 3, a form represents: the Kvs of DN65 valve for pressure difference of take is 40M
3the corresponding valve for pressure difference of/H is controlled the flow range under pressure reduction, and the b form in Fig. 3 represents: the Kvs of DN65 valve for pressure difference of take is 40M
3the corresponding valve for pressure difference of/H is controlled the valve for pressure difference operting differential pressure scope under pressure reduction.
According to the form on Fig. 3, can determine that flow rate test value and the valve for pressure difference operting differential pressure test value of each valve for pressure difference control pressure reduction section are as follows simultaneously:
By regulating the control pressure reduction section of the pilot valve setting current differential pressure valve in valve for pressure difference, by regulating pressure regulator valve 1 to set, need the down-off of working as of measurement simultaneously, and by adjusting variable valve 1 and variable valve 26, set the operting differential pressure of valve for pressure difference.Concrete data are as follows:
A, initial pressure difference valve control 0.02 section of pressure reduction, and flow rate test value is respectively: 18,16,14,12,10,8,6,4,2}.Above-mentionedly 0.02 section of minimum flow, 1.79, get 2, maximum flow 17.89 is being got even positive number value in the middle of getting 18.
(1) setting flow is 10M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s1～Δ P
s7.
(2) setting flow is 12M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s8～Δ P
s14.
(3) setting flow is 14M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s15～Δ P
s21.
(4) setting flow is 16M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s22～Δ P
s28.
(5) setting flow is 18M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s29～Δ P
s35.
(6) setting flow is 8M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s36～Δ P
s42.
(7) setting flow is 6M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s43～Δ P
s49.
(8) setting flow is 4M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s50～Δ P
s56.
(9) setting flow is 2M
3/ H; Valve for pressure difference operting differential pressure 0.15Mpa is 0.2 section and controls differential pressure measurement reference data.Valve for pressure difference operting differential pressure test value be respectively 0.02,0.04,0.1,0.15,0.25,0.3,0.35} respectively measurement-recording system control pressure reduction actual value { Δ P
s58～Δ P
s63.
(10) calculate the relative error of controlling pressure reduction:
Δ P
sp in presentation graphs 2
1to P
2pressure reduction be that the system measured of test is controlled pressure difference;
Δ P
prepresent the arithmetic mean for all systems control pressure differences under valve for pressure difference control pressure reduction that test is measured; Be that the arithmetic mean that above-mentioned test value obtains can be expressed as
ΔP
P=（ΔP
s1+ΔP
s2+……ΔP
s63）/63
Simultaneously according to formula
Obtain T
0.02time system control pressure reduction relative error.
(11) reference data, according to T
0.2size is adjusted and to be dwindled or to expand flow range and valve for pressure difference operting differential pressure scope, T
0.28% of > > suitably dwindles the upper limit or the lower limit of flow range and operting differential pressure scope; T
0.28% upper limit or lower limit that suitably expands flow range and operting differential pressure scope of < <, measures again, if there is not above-mentioned situation, it is correct making above-mentioned measurement data clear.
B, valve for pressure difference are controlled 0.04 section of pressure reduction, and flow measurement is segmented into: 27,24,21,18,15,12,9,6,3.Regulate as stated above successively valve for pressure difference operting differential pressure to measure and calculate this valve for pressure difference and control the system control pressure reduction relative error T under pressure reduction section
0.04.
C, valve for pressure difference are controlled 0.06 section of pressure reduction, and flow measurement is segmented into: 30,27,24,21,18,15,12,9,6,3.Regulate as stated above successively valve for pressure difference operting differential pressure to measure and calculate this valve for pressure difference and control the system control pressure reduction relative error T under pressure reduction section
0.06.
By above-mentioned mode, calculate the system control pressure reduction relative error T that valve for pressure difference is controlled 0.08 section of pressure reduction and 0.1 section successively
0.08and T
0.1.The system that wherein above-mentioned any valve for pressure difference control pressure reduction section calculates is controlled pressure reduction relative error all to be needed as T
0.02whether the relative reference data of Shi Jinhang judges, whether the data of calculate and measurement meet requirement of experiment, have distortion phenomenon to occur.
For above-mentioned comprehensive metering system, can set up as required relevant differential pressure valve intake pressure P
2, differential pressure valve top hole pressure P
3, flow Q, Δ P
swith Δ P
pand system is controlled the relative error T of pressure reduction
Δ Pset up corresponding form.Realize the object of clear management and Measurement accuracy.
The object that simultaneously wants to realize fast detecting only needs minimum measurement realize the measurement that system is controlled pressure reduction for twice, and principle is controlled under pressure reduction system for each valve for pressure difference and controlled pressure reduction and reach maximal value when flow minimum test value and the valve for pressure difference operting differential pressure full test value; System is controlled pressure reduction and when flow rate test value maximal value and valve for pressure difference operting differential pressure test value minimum value, is reached minimum value.
Therefore regulate the pilot valve of valve for pressure difference to set valve for pressure difference control pressure reduction section, with 1/2Kvmax flow and 1/2(P
2-P
3)
maxoperting differential pressure, setup control differential pressure measurement benchmark.
Flow set minimum value Kvmin and operting differential pressure are set maximal value (P
2-P
3)
max, survey record is controlled pressure reduction maximal value Δ P
max;
Flow set maximal value Kvmax and operting differential pressure are set minimum value (P
2-P
3)
min, survey record is controlled pressure reduction minimum value Δ P
min;
⑷ΔP
P=1/2（ΔP
max+ΔP
min）
(5) calculate the relative error of controlling pressure reduction:
(6) reference data, finishing analysis data, according to T
Δ Psize is adjusted and to be dwindled or to expand flow range and operting differential pressure scope, T
Δ P8% of > > suitably dwindles the upper limit or the lower limit of flow range and operting differential pressure scope; T
Δ P8% upper limit or lower limit that suitably expands flow range and operting differential pressure scope of < <.
According to above-mentioned principle valve for pressure difference control pressure reduction 0.02,0.04,0.06,0.08,0.1} section carries out respectively the calculating that system is controlled pressure reduction relative error.
The system obtaining in the control pressure reduction section any section of tested valve for pressure difference is controlled pressure reduction and is less than established standards value and reaches standard normal pressure difference valve 8% time.It is more approaching better that any section valve for pressure difference is controlled system control pressure reduction relative error corresponding under pressure reduction.
Below principle of work of the present invention:
According to the principle of work of differential pressure valve, this performance test methods is according to the control pressure reduction ability of tested valve for pressure difference self, in corresponding flow range, evenly choose and set flow, simultaneously in the situation that setting flow is constant, regulate valve for pressure difference operting differential pressure, with this, measure corresponding valve for pressure difference and control system control pressure reduction under pressure reduction, system control pressure reduction now at least comprises valve for pressure difference and controls minimum system control pressure reduction and the maximum system control pressure reduction in the flow range that pressure difference is corresponding and within the scope of valve for pressure difference operting differential pressure.When selected valve for pressure difference of measurement is controlled pressure difference, set flow, within the scope of full flow, evenly segmentation is chosen one by one, the flow that during concrete measurement, selected flow section is set is motionless, by gamut, regulate operting differential pressure, measure the changing value that corresponding valve for pressure difference is controlled the system control pressure reduction in the interior valve for pressure difference operting differential pressure of this flow range under pressure difference.Gamut variable flow so one by one, gamut changes operting differential pressure, reaches comprehensive reflection and detects the performance quality that the relative error of controlling pressure reduction under different condition judges tested valve for pressure difference.Thereby the Performance Evaluation that makes valve for pressure difference is more rigorous and accurate.This method can, by manually realizing, can realize this method by automation equipment simultaneously.The carry out automatic control and adjustment of realization to valve for pressure difference, variable valve, pressure regulator valve, then the measurement numerical value that receives differential manometer 1, differential manometer 24 and flowmeter 7 etc. is calculated and is obtained system control pressure reduction relative error according to this method, and the performance of the tested valve for pressure difference of automatization judgement quality, the device that this device is quoted with background technology also can be realized.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.The valve for pressure difference of a kind of model of use in figure and in embodiment is given an example simultaneously, the present invention can realize the above-mentioned performance test of any valve for pressure difference, simultaneously can flow rate test value when test and valve for pressure difference test value can within the scope of corresponding flow range and valve for pressure difference, carry out even segmentation and choose, two kinds of modes that embodiment exemplifies are wherein two kinds, in test process, can select as required.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used the terms such as pressure regulator valve 1, differential manometer 1, valve for pressure difference 3, differential manometer 24, variable valve 1, variable valve 26, flowmeter 7 herein, do not got rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (10)
1. a valve for pressure difference performance test methods, is characterized in that, key step is as follows:
A, determine that each tested valve for pressure difference controls tested operting differential pressure test value and flow rate test value under pressure difference Δ P:
Determine that tested valve for pressure difference controls flow range under pressure difference and corresponding valve for pressure difference operting differential pressure scope; Each tested valve for pressure difference is controlled pressure difference Δ P section, corresponding valve for pressure difference control pressure reduction section within the scope of the tested valve for pressure difference operting differential pressure of correspondence, evenly chooses some operting differential pressure test values and corresponding tested valve for pressure difference control pressure reduction section is evenly chosen some flow rate test values in flow range, described some operting differential pressure test values at least comprise minimum operationg pressure differential and the maximum differential pressure under corresponding tested valve for pressure difference control pressure difference Δ P, and described some flow rate test values comprise minimum flow and the maximum flow under corresponding tested valve for pressure difference control pressure difference Δ P;
B, measure all valve for pressure difference and control the system of the corresponding flow rate test values of pressure difference Δ P section and valve for pressure difference operting differential pressure test value and control pressure reduction:
Each tested valve for pressure difference is controlled pressure difference Δ P section, during setting measurement, above-mentioned valve for pressure difference is controlled the flow rate test value of pressure difference Δ P section correspondence, regulate operting differential pressure test value simultaneously, measure one by one respectively and record each pressure measurement difference limen and control pressure difference Δ P section, all measuring flow test values have respectively all systems that differential manometer is measured to control pressure differential deltap Ps under all operting differential pressure test values, each tested valve for pressure difference is controlled pressure difference Δ P section, at least in maximum flow, measuring system under minimum differntial pressure valve operting differential pressure is controlled pressure reduction and minimum flow, system during maximum differential pressure valve operting differential pressure is controlled pressure differential deltap Ps,
The system of C, computation and measurement is controlled the relative error of pressure reduction: all systems that measure according to each valve for pressure difference control pressure reduction section are controlled the relative error that pressure differential deltap Ps computing systems are controlled pressure reduction;
D, judgement valve for pressure difference performance: the system that each tested valve for pressure difference control pressure differential deltap P section calculates is controlled the relative error T of pressure reduction
Δ Pcompare with established standards value, all systems are controlled the relative error T of pressure reduction
Δ Pbe less than established standards value for normal, and all pressure measurement difference limens of measuring of same tested valve for pressure difference system of controlling pressure differential deltap P section correspondences to control pressure reduction relative error close to each other for excellent.
2. valve for pressure difference performance test methods according to claim 1, it is characterized in that, in described steps A, describedly determine and calculate tested valve for pressure difference and control the flow range under pressure reduction, measure valve for pressure difference flow coefficient k vs: it is full-gear that valve for pressure difference Double-clack is fixed on maximum opening, when valve for pressure difference control pressure difference is controlled at 0.1MPa, the flow that valve for pressure difference is now flow through in measurement is Kvs;
The maximum flow Qmax that determines the corresponding valve for pressure difference control pressure difference of measuring is:
during calculating, △ P is by MPa Conversion of measurement unit WeiBar unit, 1Bar=0.1MPa;
The minimum flow Qmin that determines the corresponding valve for pressure difference control pressure difference of measure is: Qmin=1/R * Qmax;
Wherein, the control pressure difference that △ P is tested valve for pressure difference; R is regulating ratio, and described regulating ratio R is 10.
3. valve for pressure difference performance test methods according to claim 2, is characterized in that, in described steps A, determines that tested valve for pressure difference respectively controls the valve for pressure difference operting differential pressure scope that pressure difference is corresponding:
According to the tested valve for pressure difference operting differential pressure of maximum, be: 0.35Mpa～0.3Mpa;
Minimum tested valve for pressure difference operting differential pressure is: equal tested valve for pressure difference and control pressure difference Δ P;
According to aforesaid way, determine and calculate tested valve for pressure difference and respectively control the valve for pressure difference operting differential pressure scope that pressure difference is corresponding.
4. valve for pressure difference performance test methods according to claim 3, is characterized in that, in described steps A, wherein tested valve for pressure difference control pressure differential deltap P be 0.02,0.04,0.06,0.08,0.1}, unit is MPa; Described tested valve for pressure difference is controlled flow range corresponding to pressure differential deltap P
corresponding valve for pressure difference operting differential pressure scope be 0.02～0.35,0.04～0.35,0.06～0.35,0.08～0.35,0.1～0.35}.
5. according to the valve for pressure difference performance test methods described in any one in claim 1-4, it is characterized in that, in described steps A, described definite valve for pressure difference operting differential pressure test value and flow rate test value, by getting intermediate value as valve for pressure difference operting differential pressure measuring basis data between the minimum differntial pressure valve operting differential pressure under the tested valve for pressure difference control of correspondence pressure difference Δ P and maximum differential pressure, describedly in the tested valve for pressure difference of correspondence, control and between minimum flow under pressure difference Δ P and maximum flow, get intermediate value and do Flow datum measurement data
Wherein, 1. regulate the pilot valve of valve for pressure difference to make tested valve for pressure difference control pressure difference in corresponding Δ P section;
2. on regulating system pipeline, corresponding pressure regulator valve is set flow and is reached corresponding flow rate test value;
3. on regulating system pipeline, corresponding variable valve regulates valve for pressure difference operting differential pressure to reach corresponding valve for pressure difference operting differential pressure.
6. valve for pressure difference performance test methods according to claim 5, in step C, it is characterized in that, the system control pressure reduction actual value Δ Ps calculating arithmetic mean that described each tested valve for pressure difference is controlled the measurement of pressure differential deltap P section obtains Δ Pp, and system is controlled pressure reduction relative error
7. valve for pressure difference performance test methods according to claim 6, is characterized in that, described in all valve for pressure difference of the tested valve for pressure difference that the calculates system of controlling pressure reduction section correspondence control pressure reduction relative error T
Δ Pmuch smaller than or while being greater than established standards value, adjust flow and pressure differential range, again measure.
8. valve for pressure difference performance test methods according to claim 7, is characterized in that,, described system is controlled pressure reduction relative error T
Δ Pduring much larger than established standards value, dwindle the upper limit or the lower limit of flow range and valve for pressure difference operting differential pressure scope; System is controlled pressure reduction relative error T
Δ Pduring much smaller than established standards value, expand the upper limit or the lower limit of flow range and valve for pressure difference operting differential pressure scope.
9. valve for pressure difference performance test methods according to claim 8, is characterized in that, in described step F, described established standards value is 7%-8%.
10. valve for pressure difference performance test methods according to claim 1, it is characterized in that,, flow rate test value, valve for pressure difference operting differential pressure test value, the system control pressure reduction recording and system in the flow range of described valve for pressure difference control pressure reduction section correspondence are controlled pressure reduction relative error and are set up form one to one.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089762B (en) * | 2014-07-04 | 2017-01-18 | 国家电网公司 | Flow characteristic test method of turbine governing valve |
| CN111999581A (en) * | 2020-08-14 | 2020-11-27 | 燕山大学 | Device and method for testing electromagnetic characteristics of small-flow electromagnetic switch valve |
| CN114235386A (en) * | 2022-02-28 | 2022-03-25 | 艾肯（江苏）工业技术有限公司 | Test platform for verifying static pressure life of stop valve through fluid detection |
| CN114354179A (en) * | 2021-12-30 | 2022-04-15 | 哈尔滨哈控实业有限公司 | Balance valve testing system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09203793A (en) * | 1996-01-25 | 1997-08-05 | Toshiba Corp | Test method of main steam isolation valve |
| DE102004060077A1 (en) * | 2004-12-14 | 2006-07-06 | Continental Teves Ag & Co. Ohg | Circuit for hydraulic or pneumatic testing of valves, brake calipers, has low pressure meter connected to test line between shut-off valve, test connection, whose connection to test line is automatically isolated for high pressure testing |
| KR100713621B1 (en) * | 2006-07-10 | 2007-08-10 | 주식회사 한빛파워서비스 | Method for testing performance of current air driven type control valve |
| KR20090124618A (en) * | 2008-05-30 | 2009-12-03 | 주식회사 현대오토넷 | Apparatus and method for testing valve of solenoid |
| CN101949772A (en) * | 2010-09-29 | 2011-01-19 | 奇瑞汽车股份有限公司 | Method for measuring pressure reliving rate of pressure reducing valve and detection method of pressure reducing valve |
| CN102564753A (en) * | 2011-12-31 | 2012-07-11 | 杭州哲达科技股份有限公司 | Test table of intelligent fluid control valve and detecting method thereof |
-
2013
- 2013-12-31 CN CN201310754776.8A patent/CN103674541B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09203793A (en) * | 1996-01-25 | 1997-08-05 | Toshiba Corp | Test method of main steam isolation valve |
| DE102004060077A1 (en) * | 2004-12-14 | 2006-07-06 | Continental Teves Ag & Co. Ohg | Circuit for hydraulic or pneumatic testing of valves, brake calipers, has low pressure meter connected to test line between shut-off valve, test connection, whose connection to test line is automatically isolated for high pressure testing |
| KR100713621B1 (en) * | 2006-07-10 | 2007-08-10 | 주식회사 한빛파워서비스 | Method for testing performance of current air driven type control valve |
| KR20090124618A (en) * | 2008-05-30 | 2009-12-03 | 주식회사 현대오토넷 | Apparatus and method for testing valve of solenoid |
| CN101949772A (en) * | 2010-09-29 | 2011-01-19 | 奇瑞汽车股份有限公司 | Method for measuring pressure reliving rate of pressure reducing valve and detection method of pressure reducing valve |
| CN102564753A (en) * | 2011-12-31 | 2012-07-11 | 杭州哲达科技股份有限公司 | Test table of intelligent fluid control valve and detecting method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089762B (en) * | 2014-07-04 | 2017-01-18 | 国家电网公司 | Flow characteristic test method of turbine governing valve |
| CN111999581A (en) * | 2020-08-14 | 2020-11-27 | 燕山大学 | Device and method for testing electromagnetic characteristics of small-flow electromagnetic switch valve |
| CN114354179A (en) * | 2021-12-30 | 2022-04-15 | 哈尔滨哈控实业有限公司 | Balance valve testing system and method |
| CN114354179B (en) * | 2021-12-30 | 2023-09-26 | 哈尔滨哈控实业有限公司 | Balance valve testing system and method |
| CN114235386A (en) * | 2022-02-28 | 2022-03-25 | 艾肯（江苏）工业技术有限公司 | Test platform for verifying static pressure life of stop valve through fluid detection |
| CN114235386B (en) * | 2022-02-28 | 2022-05-13 | 艾肯（江苏）工业技术有限公司 | Test platform for verifying static pressure life of stop valve through fluid detection |
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