CN1837996A - Control method for dynamic balancing electric regulating valve with energy metering function and valve thereof - Google Patents
Control method for dynamic balancing electric regulating valve with energy metering function and valve thereof Download PDFInfo
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- CN1837996A CN1837996A CN 200610049822 CN200610049822A CN1837996A CN 1837996 A CN1837996 A CN 1837996A CN 200610049822 CN200610049822 CN 200610049822 CN 200610049822 A CN200610049822 A CN 200610049822A CN 1837996 A CN1837996 A CN 1837996A
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Abstract
This invention relates to a control method for dynamic balancing electric regulating valve with energy metering function and valve thereof. To This intelligent valve, opening the butterfly valve with an electric actuator to let water flow in from interval channel of front valve to cross the pore plate and butterfly valve and final flow out from the interval channel of the back valve; arranging meters on ends of the pore plate to measure dynamic pressure difference; arranging temperature sensors for valve body and water supply pipe to measure temperature difference and compute energy. This invention has ideal regulation characteristic with simple construction and low cost, and has obvious benefit to comprehensive energy conservation.
Description
Technical field
The present invention relates to a kind of valve control method and valve.More particularly, the present invention relates to a kind of intelligent control method for dynamic balancing electric regulating valve and valve with energy metering function.
Background technology
50%～65% is consumed in central air conditioner system in the annual power consumption of top-grade building thing, and unsteady flow amount air-conditioning system is compared with the constant flow air-conditioning system, and water pump and cooling tower equipment on average can save energy 60%～80%, refrigeration host computer can save energy 10%～40%.But ubiquity the hydraulic misadjustment phenomenon in the air-conditioning flow-changing water system, and the pipe network water force unbalance causes a large amount of wastes of system's energy and the increase of establishing running noises easily.Adopting intelligent dynamic balance motor-driven variable valve control technology is the best approach that solves complex grid Hydraulic Power System balance.In order to alleviate energy shortage, create conservation-minded society, Based Intelligent Control, energy meter and the hydraulic equilibrium technology of central air conditioner system must be kept whole harmonious development.
At present known principle and the method that is used for the cold and hot amount metering of central air conditioner can be divided into three major types, i.e. simple cumulative method of time, wind side temperature difference flow accumulation method, water side temperature difference flow accumulation method.Wherein the energy meter theory of water side temperature difference flow accumulation method is perfect, the precision height, and stable and reliable operation has a lot of mature technologies and the single product of seriation at present.Cold and heat meter based on this principle mainly is made up of flow sensor, pairing temperature sensor and integrator (controller) three parts.Press the difference of flow sensor form, this class energy meter also is divided into mechanical vane type, ultrasonic type and three kinds of models of electromagnetic type.Wherein mechanical vane type energy meter scale is because of having miniature movable member in the physical construction, to having relatively high expectations of aqueous medium, requires the ancillary filter device in case the damage of impurity his-and-hers watches installing.The mechanical energy table is because of its measuring principle and simple in structure, and is cheap, and precision is general, widely applied among the metering of fan coil at present.And the small-bore energy meter of ultrasonic type and electromagnetic type seldom has popularization and application because of the influence of factors such as price, technology.
With FlowCon, DANFOSS is the world-renowned brand mobile equilibrium type electric control valve product (comprising the non-integral dynamic balance motor-driven variable valve that common electric variable valve and mechanical type pressure reduction/flow equilibrium operation valve combines) of representative, it is that a kind of electric control valve with mechanical self-operated type pressure reduction/flow automatic balance control function (or claims electronic dynamic adjustments valve in essence, or title pressure independent type electric control valve), the mechanical principle of its dynamic differential pressure balance is very simple, promptly works as the two ends pressure reduction DP=P of one-piece type dynamic balance motor-driven variable valve or non-one-piece type dynamic balance motor-driven variable valve
1-P
3During random variation, utilize the pressure balance controller to change DP mechanically
2=P
2-P
3Difference guarantee DP
1=P
1-P
2Automatic constant (pressure reduction is controlled rear-mounted principle).Perhaps, utilize the pressure balance controller to change DP mechanically
1=P
1-P
2Difference guarantee DP
2=P
2-P
3Automatic constant (pressure reduction control forward type principle).
For several worlds brand partial dynamic balance electric variable valve product at present leading market, pass through our test and discover that the adjustment feature curve of its dynamic balance motor-driven variable valve part of most of product is not equal percent regulating characteristic in essence.
The dynamic balance motor-driven variable valve product of widely applying generally adopts the realization principle of spring mechanical self-operated type at present, thereby having that through-current capability is obviously less than normal, mobile equilibrium pressure reduction range of control is little, application is dumb, the operting differential pressure initial value is higher, higher (because DP=DP totally consumes energy
1+ DP
2, the pressure that must sacrifice differential pressure controller during actual the use is kept the pressure reduction automatic constant of motorized adjustment part.The pressure of obviously sacrificing differential pressure controller also is the waste energy consumption).
Analog quantity motorized adjustment butterfly valve (or analog quantity motorized adjustment ball valve) is widely used in the control that fluid flows because of advantages such as it are simple in structure, easy to manufacture, through-current capability is big.If valve Advanced Control method is embedded into intelligent controller, and carry out integrated combination in conjunction with miniature differential pressure pickup, temperature sensor (or pairing temperature sensor), analog quantity motorized adjustment butterfly valve, constitute a kind of Intelligent Dynamic balanced type electric control valve with energy metering function.
When adopting the very low high-grade intelligent type dynamic balance motor-driven variable valve of this initial operting differential pressure value, pipes system water system synthesis energy saving effect can reach 10%～55%.
Present known a kind of control method for dynamic balancing electric regulating valve and valve of also not finding with energy metering function.
Summary of the invention
Fundamental purpose of the present invention is to overcome deficiency of the prior art, and a kind of Intelligent Dynamic balance electric variable valve control method is provided.Further object of the present invention is to provide a kind of dynamic balance motor-driven variable valve with energy metering function.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The invention provides a kind of control method for dynamic balancing electric regulating valve (based on indirect dynamic flow equilibrium method), may further comprise the steps with energy metering function:
(1) the mobile equilibrium pressure reduction maximal value of setting valve in can realizing the universal intelligent controller that mathematical function calculates and APID controls;
(2) set mobile equilibrium flow maximal value according to the mobile equilibrium pressure reduction maximal value and the orifice plate area of valve;
(3) the desirable control characteristic of setting valve be linear adjustment characteristic, equal percent regulating characteristic or para-curve control characteristic wherein any one;
(4) intelligent controller carries out data sampling to the simulating signal of outside input, reads in outside valve position stroke value and temperature signal measured value;
(5) will there be the outside valve position stroke value analog signal conversion of dimension to become nondimensional valve position stroke;
(6) obtain nondimensional mobile equilibrium pressure differential resetting value according to the control characteristic of valve, and convert the mobile equilibrium pressure differential resetting value of dimension to;
(7) the mobile equilibrium differential pressure measurement value that dimension will be arranged with have the mobile equilibrium pressure differential resetting value of dimension to compare, the aperture of regulating electric control valve according to APID control operation result is by realizing the balance of dynamic flow indirectly to the control of mobile equilibrium pressure reduction;
(8) product that is shaped on the mobile equilibrium flow value of dimensionization and temperature signal value according to standard unit carries out the integrating of energy.
The present invention also provides a kind of control method for dynamic balancing electric regulating valve (based on direct dynamic flow balancing method) with energy metering function, may further comprise the steps:
(1) the dynamic flow balance maximal value of setting valve in can realizing the universal intelligent controller that mathematical function calculates and APID controls;
(2) set mobile equilibrium pressure reduction maximal value according to the dynamic flow balance maximal value and the orifice plate area of valve;
(3) control characteristic of setting valve be linear adjustment characteristic, equal percent regulating characteristic or para-curve control characteristic wherein any one;
(4) intelligent controller carries out data sampling to the simulating signal of outside input, reads in outside valve position stroke value and temperature signal measured value;
(5) outside valve position stroke value analog signal conversion is become nondimensional valve position stroke;
(6) obtain nondimensional dynamic flow balance setting value according to the valve regulated feature, and convert the dynamic flow balance setting value of dimension to;
(7) utilize orifice plate area and the mobile equilibrium differential pressure measurement value that dimension is arranged to obtain the dynamic flow balancing side value of dimension, and compare with setting value, according to the aperture that APID control operation result is regulated the analog quantity electric control valve, directly realize the balance of dynamic flow;
(8) product that is shaped on the mobile equilibrium flow value of dimensionization and temperature signal measured value according to standard unit carries out the integrating of energy.
The present invention further provides a kind of dynamic balance motor-driven variable valve with energy metering function, comprise valve body and the motorized adjustment valve module of being located in the valve body 2, be provided with orifice plate 5 in the inner flow passage of described valve body, on the valve body wall of orifice plate 5 front and back, offer respectively pressure measurement chew 7 and pressure measurement chew 9; Differential pressure pickup 10 is chewed 7 with pressure measurement respectively by pressure dispatch tube 8 and is chewed 9 with measurement and link to each other; Intelligent controller 11 by cable 13 respectively with differential pressure pickup 10 be arranged at motorized adjustment valve module 2 on electric actuator 14, be arranged at the return water temperature sensor 15 on the valve body, the supply water temperature sensor 16 that is arranged on the supply channel links to each other.
As a further improvement on the present invention, described orifice plate 5 is placed in the inner flow passage of valve body by the form of clamping.
As a further improvement on the present invention, fixed head 4 is set in the inner flow passage of described valve body, orifice plate 5 directly is assemblied on the fixed head 4 by screw or bolt.
As a further improvement on the present invention, described valve body is divided into front valve shell 6 and rear valve body 1, and front valve shell 6, motorized adjustment valve module 2 and rear valve body 1 are connected successively by bolt 3.
As a further improvement on the present invention, described electric actuator 14 is simulation angulation stroke electric actuator.
As a further improvement on the present invention, described motorized adjustment valve module 2 is motorized adjustment butterfly valve assembly or motorized adjustment ball valve assembly.
As a further improvement on the present invention, described return water temperature sensor 15 and supply water temperature sensor 16 are pairing temperature sensors of measuring the temperature difference.
As a further improvement on the present invention, described valve body can be isodiametric cylindrical shell or the cylindrical shell that becomes diameter, and valve body and the motorized adjustment valve module of being located in the valve body 2 externally are incorporate shape.
Compared with prior art, the invention has the beneficial effects as follows:
Employing has the control method for dynamic balancing electric regulating valve of energy metering function, when intelligent controller output analog signals is opened the valve body in the motorized adjustment valve module by the angle stroke action of electric actuator, water flows into from the runner inlet of front valve shell, flow through behind the orifice plate by streaming the valve body of butterfly valve, runner exit from rear valve body flows out at last, the two ends of orifice plate are provided with pressure measurement and chew, and are used for the dynamic differential pressure of measuring diaphragm.Utilize the data acquisition function of intelligent controller to read in outside valve position stroke value (i.e. the standard of outside input control electric signal opening value is as the external setting-up value), coolant-temperature gage difference measurements value:
(1) for indirect dynamic flow equilibrium method, utilize characteristic formula to calculate the mobile equilibrium pressure differential resetting value at orifice plate two ends, when the mobile equilibrium differential pressure measurement value at orifice plate two ends and this setting value generation deviation, utilize the APID control method to regulate the aperture of analog quantity electric butterfly valve, the mobile equilibrium pressure reduction at orifice plate two ends is controlled at certain dynamic setting value (this is a kind of by the given mobile equilibrium pressure differential resetting value of external analog input mode) automatically, thereby has realized high-precision dynamic flow balance indirectly;
(2) for direct dynamic flow balancing method, adopt characteristic formula to calculate the dynamic flow balance setting value of orifice plate, when the dynamic flow balancing side value of orifice plate (utilize the area of mobile equilibrium differential pressure measurement value and orifice plate to convert and to obtain the measured value of this flow) during with dynamic flow balance setting value generation deviation, utilize the APID control method directly to regulate the aperture of motorized valve, the valve flow high precision in control is at certain dynamic setting value (this be a kind of dynamically changeable pass through the given flow setting value of external analog input mode), thereby directly realized high-precision dynamic flow balance.
Intelligent dynamic balance motor-driven variable valve of the present invention has the desirable valve regulating characteristic of pressure independent type, and integrated air conditioner cold-heat amount function of measuring.And one valve arrangement technology is simple, the operting differential pressure initial value is little, through-current capability is big, long service life, cheap for manufacturing cost, is fit to the many variety production of short run.
Owing to have energy meter and dynamic balance motor-driven regulatory function, its synthesis energy saving effect is fairly obvious when being applied to air-conditioning, heating network water system.
Description of drawings
Fig. 1 is the dynamic balance motor-driven variable valve assembling synoptic diagram that has energy metering function in the embodiment of the invention.
In the accompanying drawing: 1 rear valve body, 2 motorized adjustment valve modules, 3 coupling bolts, 4 fixed heads, 5 orifice plates, 6 front valve shells, 7 pressure measurement are chewed, 8 pressure dispatch tubes, 9 pressure measurement are chewed, 10 differential pressure pickups, 11 intelligent controllers, 12 connection terminals, 13 cables, 14 analog quantity electric actuator, 15 return water temperature sensors, 16 supply water temperature sensors.
Embodiment
With reference to the accompanying drawings 1, will describe the present invention below.
Provided a kind of intelligent dynamic balance motor-driven variable valve among the figure with energy metering function, comprise motorized adjustment valve module 2 and the angle stroke analog quantity electric actuator 14 that links to each other with motorized adjustment valve module 2, be used for implementing the electric control valve analog quantity adjusting of (as regulating butterfly valve, regulating ball valve).Front valve shell 6, motorized adjustment valve module 2, rear valve body 1 connect successively, are fitted to one by coupling bolt 3.Described motorized adjustment valve module 2 is motorized adjustment butterfly valve assemblies, also can select the motorized adjustment ball valve assembly for use.Valve body can be isodiametric cylindrical shell or the cylindrical shell that becomes diameter, and valve body and the motorized adjustment valve module of being located in the valve body 2 externally can be to be incorporate shape.
Abacus 5 in the inner flow passage of described front valve shell 6 emits on the fixed head 4 that directly is fitted in the front valve shell 6 by spiral shell, can certainly directly be fitted in the inner flow passage of front valve shell 6 by the form of clamping.
The outer wall of front valve shell 6 offer pressure measurement chew 9 and pressure measurement chew 7, be connected to the high-pressure side and the low pressure end of differential pressure pickup 10 by pressure dispatch tube 8, in order to the two ends pressure reduction (being the mobile equilibrium pressure reduction of orifice plate) of measuring orifice plates 5 in the front valve shell 6 and become and send into standard signal.
Intelligent controller 11 by cable 13 respectively with differential pressure pickup 10 be arranged at motorized adjustment valve module 2 on electric actuator 14, be arranged at the return water temperature sensor 15 on the valve body, the supply water temperature sensor 16 that is arranged on the supply channel links to each other.Return water temperature sensor 15, supply water temperature sensor 16 are pairing temperature sensors of measuring the temperature difference, can adopt pairing PT500, pairing PT1000, also can adopt the pairing digital temperature sensor of DALLAS company.
Differential pressure pickup 10, intelligent controller 11, analog quantity electric actuator 14 and dynamic balance motor-driven valve assembly 2 have constituted orifice differential pressure mobile equilibrium control device jointly, thereby realize the mobile equilibrium of flow.
Intelligent controller 11 can be embedded or be downloaded and can carry out energy integrating and the integrated program of dynamic flow Balance Control.Utilize the senior calculating of this program, intelligent controller 11 outputting standard control signals are directly regulated analog quantity electric actuator 14 by cable 13, realize the mobile equilibrium control of orifice plate 5 flows in the front valve shell 6 by the aperture of regulating motorized valve.Described indirect flow running balancing belongs to the pressure balance method.
This is a kind of electronic type dynamic balance motor-driven valve control method and valve that typically belongs to the pressure independent type, and the principle of controlling is as follows:
For intelligent dynamic balance motor-driven variable valve of the present invention, can introduce " dummy variable " x (being previously described outside valve position stroke value) of a control valve position stroke, the simulating signal that it is promptly imported corresponding to the outside.For example 0～10VDC standard control signal represents that scope x ∈ [0,10], 4～20mA standard control signal represent x ∈ [4,20].
Suppose dimensionless valve position stroke value variable X, dimensionless flow Q, the dimensionless pressure differential deltap P of dynamic balance motor-driven variable valve, obviously can carry out the unit definition them:
X∈[0，1]、Q∈[0，1]、ΔP∈[0，1]
Described nondimensional outside valve position stroke value X is one and carries out the dimensionless number of unitization by outside input standard control signal, for example for 0～10VDC standard control signal, can get X=x/10 and carry out nondimensionalization.
Because the dimensionless relative flow coefficient K of variable valve
VS=1, so formula is arranged:
Perhaps Δ P=Q
2(2)
(1) for linear characteristic:
Q＝X，ΔP＝X
2 (3)
(2) for equal percentage characteristics (the R constant needs given separately):
Q＝R
X-1，ΔP＝R
2·(X-1) (4)
Can certainly adopt approximate fitting formula Δ P=f (x)=y to represent for formula (4), for example
Quadravalence fitting of a polynomial formula during for R=5 is as follows:
y＝1.014271057x
4-.7317960344x
3+.6015181377x
2+.07302617232x
+.04132977829 (4-1)
(3) for parabolic characteristic:
Q＝X
2，ΔP＝X
4 (5)
Obviously, formula (3)～(5) are exactly the dimensionless characteristic formula of realizing valve regulating characteristic, and wherein formula (4) also can adopt various approximate fitting formulas.
When analog quantity electric actuator 14 was opened the valve body in the analog quantity dynamic balance motor-driven valve assembly 2, water flowed into from front valve shell 6 runners inlet, and orifice plate 5 backs of flowing through are by streaming butterfly valve body, and the runner exit from rear valve body 1 flows out at last.The two ends of orifice plate 5 be provided with pressure measurement chew 7 and pressure measurement chew 9, be used for the two ends pressure reduction of measuring diaphragm.
Described intelligent controller 11 both can adopt universal intelligent controller product, also can carry out secondary development by the special intelligent controller, and intelligent controller 11 also comprises some standard I/O connection terminal 12.Intelligent controller 11 can be selected the general PLC product of the S7-200 of SIENENS company for use and carry out advanced programming with STEP7 and realize, also can adopt multiloop automation control apparatus table, perhaps carry out the secondary development configuration or carry out the secondary configuration based on ripe DDC product based on Embedded single-chip microcomputer (MCU).
When the automatically controlled signal x of outside valve position stroke gives regularly (promptly outside input valve position setting value), the dimensionless valve position stroke X of correspondence is also promptly given.
(1) based on indirect dynamic flow equilibrium method: utilize dimensionless feature calculation formula (3) or formula (4) or formula (5) to calculate the setting value of dimensionless pressure differential deltap P.Having provided by conversion has the orifice plate of dimension two ends mobile equilibrium pressure differential resetting value (this is a kind of dynamic setting value, and promptly setting value changes with external input signal).When the mobile equilibrium differential pressure measurement value at orifice plate 5 two ends and mobile equilibrium pressure differential resetting value generation deviation, utilize the built-in APID control method of intelligent controller 11 to realize that by the aperture that changes the motorized adjustment butterfly valve pressure reduction of orifice plate 5 is controlled at dynamic setting value, thereby realized high-precision dynamic flow balance indirectly.Utilize dynamic flow balancing side value and differential temperature survey value to carry out the integrating of energy simultaneously.
(2) based on direct dynamic flow balancing method: utilize dimensionless feature calculation formula (3) or formula (4) or formula (5) to calculate the setting value of dimensionless flow Q.The dynamic flow balance setting value (this is a kind of dynamic flow setting value, and promptly setting value changes with external input signal) that the orifice plate two ends of dimension are arranged by converting given.When the measured value of orifice plate 5 two ends dynamic flow balances (utilizing dynamic differential pressure measured value and orifice plate area to realize indirect flow measurement) during with dynamic flow balance setting value generation deviation, the built-in APID control method of utilizing intelligent controller 11 is by changing the aperture of motorized adjustment butterfly valve, and the flow control that has directly realized orifice plate 5 is in dynamic setting value.Utilize dynamic flow balancing side value and differential temperature survey value to carry out the integrating of energy simultaneously.
Intelligent dynamic balance motor-driven variable valve control flow of the present invention is as follows:
(1) indirect flow running balancing:
(1) control characteristic, the mobile equilibrium pressure reduction maximal value DP of data preliminary examinationization, the inner factory setting valve of controller
MAX
(2) according to valve mobile equilibrium pressure reduction maximal value DP
MAXDynamic flow balance maximal value F with orifice plate area calculating valve
MAX, promptly
(3) intelligent controller reads in outside valve position stroke value x and differential temperature survey value Δ T, converts the analog quantity control signal of valve position stroke x to nondimensional valve position stroke value X;
(4) utilize valve feature calculation formula to calculate Δ P, be converted into the DP of dimension
MAXAs mobile equilibrium pressure differential resetting value, wherein DP
S=DP
MAX* Δ P.
For example: get Δ P=R for equal percent regulating characteristic
2 (X-1)(R constant) can certainly adopt function Δ P=R
2 (X-1)Approximate fitting formula Δ P=f (x)=y realize.
(5) with mobile equilibrium differential pressure measurement value DP
PWith mobile equilibrium pressure differential resetting value DP
SCompare, APID regulates the aperture of control analog quantity electric control valve, thereby has realized the balance of dynamic flow indirectly.
(6) integrating of energy is specifically from t
0The time is carved into t, and the energy integral formula is as follows constantly:
E＝∫
0C
w·ρ
w·Q
w·ΔT·dt
C wherein
wRepresentation unit conversion reduction coefficient, ρ
wDensity, the Q of expression cold/hot water
wDynamic flow balancing side value, the Δ T of expression motorized valve represent the differential temperature survey value.
(7) if continue operation, then return step (2).
(2) direct flow dynamics balancing method:
(1) data preliminary examinationization, controller control characteristic, the dynamic flow balance maximal value F of inner setting valve that dispatch from the factory
MAX
(2) according to the dynamic flow balance maximal value F of valve
MAXCalculate the mobile equilibrium pressure reduction maximal value DP of valve with the orifice plate planimeter
MAX, i.e. DP
MAX=(F
MAX/ K
VS)
2
(3) intelligent controller reads in outside valve position stroke value x and differential temperature survey value Δ T, and converts the analog quantity control signal of valve position stroke x to nondimensional valve position stroke value X;
(4) utilize valve feature calculation formula to calculate Q, be converted into the F of dimension
SAs dynamic flow balance setting value, wherein F
S=F
MAX* Q for equal percent regulating characteristic, gets Q=R
X-1Perhaps Q=R
X-1Approximate fitting formula.
(5) utilize orifice plate area and mobile equilibrium differential pressure measurement value to calculate dynamic flow balancing a survey F
P
(6) with dynamic flow balancing side value F
PWith dynamic flow balance setting value F
SCompare, operation APID regulates the aperture of control analog quantity motorized adjustment butterfly valve, directly realizes the balance of dynamic flow.
(7) integrating of energy.If continue operation, then return step (2).
The concrete technical parameter of intelligent electric variable valve of the present invention is exemplified below:
For certain DN80 product specification, design mobile equilibrium pressure differential range (16～400) KPa, orifice plate design area 2620mm
2, dynamic flow balance maximal value 32m
3/ h.If the equal percent regulating characteristic (getting R=50) of selecting for use formula (4) to realize ideal, then the relative valve position value of Dui Ying external setting-up, balance pressure reduction, balanced flow data are as shown in table 1, relatively the corresponding relation such as the table 2 of external valve place value and standard electric signal.
Table 1
| Relative valve position X | 0.05 | 0.15 | 0.25 | 0.35 | 0.45 | 0.55 | 0.65 | 0.75 | 0.85 | 0.95 | 1 |
| Balance pressure reduction KPa | 0.009 | 0.021 | 0.045 | 0.099 | 0.216 | 0.473 | 1.035 | 2.263 | 4.95 | 10.82 | 16 |
| Dynamic flow m 3/h | 0.78 | 1.15 | 1.70 | 2.52 | 3.72 | 5.50 | 8.14 | 12.03 | 17.8 | 26.3 | 32 |
Table 2
| Relative valve position X | 0.05 | 0.15 | 0.25 | 0.35 | 0.45 | 0.5 | 0.55 | 0.65 | 0.75 | 0.85 | 0.95 | 1 |
| 0-10VDC | 0.5 | 1.5 | 2.5 | 3.5 | 4.5 | 5 | 5.5 | 6.5 | 7.5 | 8.5 | 9.5 | 10 |
| 4-20mADC | 4.8 | 6.4 | 8 | 9.6 | 11.2 | 12 | 12.8 | 14.4 | 16 | 17.6 | 19.2 | 20 |
Corresponding same orifice plate only needs the setting controller characteristic formula, can also realize linear characteristic or parabolic characteristic, and these desirable control characteristics all belong to the pressure independent type, and smart valve also has the energy product amount of calculating function simultaneously.
Obviously, the operting differential pressure initial value in the above table is 16kPa, and the maximum controlling value of dynamic flow balance can reach 32m
3/ h, the overall technology data obviously are better than the mechanical type dynamic balance motor-driven variable valve of present import brand.
Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (10)
1, a kind of control method for dynamic balancing electric regulating valve with energy metering function may further comprise the steps:
(1) the mobile equilibrium pressure reduction maximal value of setting valve in can realizing the universal intelligent controller that mathematical function calculates and APID controls;
(2) set mobile equilibrium flow maximal value according to the mobile equilibrium pressure reduction maximal value and the orifice plate area of valve;
(3) the desirable control characteristic of setting valve be linear adjustment characteristic, equal percent regulating characteristic or para-curve control characteristic wherein any one;
(4) intelligent controller carries out data sampling to the simulating signal of outside input, reads in outside valve position stroke value and differential temperature survey value;
(5) will there be the outside valve position stroke value analog signal conversion of dimension to become nondimensional valve position stroke;
(6) obtain nondimensional mobile equilibrium pressure differential resetting value according to the control characteristic of valve, and convert the mobile equilibrium pressure differential resetting value of dimension to;
(7) the mobile equilibrium differential pressure measurement value that dimension will be arranged with have the mobile equilibrium pressure differential resetting value of dimension to compare, the aperture of regulating electric control valve according to APID control operation result is by realizing the balance of dynamic flow indirectly to the control of mobile equilibrium pressure reduction;
(8) product that is shaped on the mobile equilibrium flow value of dimensionization and temperature signal value according to standard unit carries out the integrating of energy.
2, a kind of control method for dynamic balancing electric regulating valve with energy metering function may further comprise the steps:
(1) the dynamic flow balance maximal value of setting valve in can realizing the universal intelligent controller that mathematical function calculates and APID controls;
(2) set mobile equilibrium pressure reduction maximal value according to the dynamic flow balance maximal value and the orifice plate area of valve;
(3) control characteristic of setting valve be linear adjustment characteristic, equal percent regulating characteristic or para-curve control characteristic wherein any one;
(4) intelligent controller carries out data sampling to the simulating signal of outside input, reads in differential temperature survey value in outside valve position stroke value and the valve passage;
(5) outside valve position stroke value analog signal conversion is become nondimensional valve position stroke;
(6) obtain nondimensional dynamic flow balance setting value according to the valve regulated feature, and convert the dynamic flow balance setting value of dimension to;
(7) utilize orifice plate area and have the mobile equilibrium differential pressure measurement value of dimension to obtain the dynamic flow balancing side value of dimension and compare with setting value, according to the aperture that APID control operation result is regulated the analog quantity electric control valve, directly realize the balance of dynamic flow;
(8) product that is shaped on the mobile equilibrium flow value of dimensionization and temperature signal measured value according to standard unit carries out the integrating of energy.
3, a kind of claim 1 or 2 described dynamic balance motor-driven variable valve realized with energy metering function, comprise valve body and the motorized adjustment valve module of being located in the valve body (2), it is characterized in that: be provided with orifice plate (5) in the inner flow passage of described valve body, offer respectively on the valve body wall before and after the orifice plate (5) that (7) are chewed in pressure measurement and (9) are chewed in pressure measurement; Differential pressure pickup (10) is chewed (7) respectively by pressure dispatch tube (8) and is chewed (9) with pressure measurement and link to each other with pressure measurement; Intelligent controller (11) by cable (13) respectively with differential pressure pickup (10) be arranged at motorized adjustment valve module (2) on electric actuator (14), be arranged at the return water temperature sensor (15) on the valve body, the supply water temperature sensor (16) that is arranged on the supply channel links to each other.
4, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, described orifice plate (5) is placed in the inner flow passage of valve body by the form of clamping.
5, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, fixed head (4) is set in the inner flow passage of described valve body, and orifice plate (5) directly is assemblied on the fixed head (4) by screw or bolt.
6, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, described valve body is divided into front valve shell (6) and rear valve body (1), and front valve shell (6), motorized adjustment valve module (2) and rear valve body (1) are connected successively by bolt (3).
7, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, described electric actuator (14) is a simulation angulation stroke electric actuator.
8, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, described motorized adjustment valve module (2) is motorized adjustment butterfly valve assembly or motorized adjustment ball valve assembly.
9, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, described return water temperature sensor (15) and supply water temperature sensor (16) are the pairing temperature sensors of measuring the temperature difference.
10, dynamic balance motor-driven variable valve according to claim 3 is characterized in that, described valve body can be isodiametric cylindrical shell or the cylindrical shell that becomes diameter, and valve body and the motorized adjustment valve module of being located in the valve body (2) externally are incorporate shape.
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| CNB2006100498224A CN100401215C (en) | 2006-03-14 | 2006-03-14 | Control method for dynamic balancing electric regulating valve with energy metering function and valve thereof |
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| CNB2006100498224A CN100401215C (en) | 2006-03-14 | 2006-03-14 | Control method for dynamic balancing electric regulating valve with energy metering function and valve thereof |
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