CN101737554A - Control method of linear temperature control valve and valve implementing same - Google Patents
Control method of linear temperature control valve and valve implementing same Download PDFInfo
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Abstract
The invention discloses a control method of a linear temperature control valve and a valve implementing the same, and the invention aims at providing the control method of the senior valve implementing the pressure independent linear temperature precise control based on the two feature values and the valve implementing the method by introducing the end equipment feature value and the pressure independent feature value. Through the control method, a linear temperature control driving device in an electric actuator can output a signal for controlling the open degree of an adjusting valve according to the relationship between a standard input signal and a pressure independent feature value measurement signal from a straight pipe of the adjusting valve, and implement the high-precision temperature control by adjusting the flow rate. The invention has the advantages of novel adjusting and control way, high control precision, strong anti-interference capacity, simple requirements on the structure of the adjusting valve, small flow resistance, and simple debugging and maintenance, can be extensively applied in the occasions with high requirements on the temperature control precision and has excellent energy-saving effect.
Description
Technical field
The present invention relates to a kind of controlling method and valve of electric control valve, is exactly a kind of controlling method of the linear thermostat valve based on end-equipment eigenvalue and pressure reduction extraneous features value and the valve of realizing this method specifically.
Background technique
The purpose of central air-conditioning system is to satisfy people to travelling comfort or technological requirement by temperature or the humidity that guarantees the air-conditioning control area.
In building Heating,Ventilating and Air Conditioning (HVAC) Hydraulic Power System, the means of traditional assurance air conditioning area temperature are by the air conditioner water piping erection electric control valve of air-conditioning equipment endways, and the measurement temperature of gathering air conditioning area by field controller or building control system, compare with the setting temperature in the controller then, the outputting standard control signal is to electric control valve, thereby the aperture by regulating valve is regulated water flow, and the heat that finally changes end-equipment output is realized the temperature of target area is controlled.
It is feasible that this temperature control method to the target area is controlled for the temperature of general precision, but for high-precision temperature control requirement, particularly at some to energy-conservation travelling comfort in the exigent large-scale Heating,Ventilating and Air Conditioning (HVAC) flow-changing water system, because the complexity of end-equipment heat output characteristic, and the hydraulic misadjustment degree of water system is very high, then be difficult to reach, following some reason specifically arranged:
1. because the temperature control method of the traditional general electric control valve of employing is not considered the influence of different terminal air-conditioning equipment heat output characteristics to the temperature regulation precision, and the heat output characteristic of air conditioner end equipment is the important indicator that influences target air-conditioning regional temperature control accuracy.
The heat output characteristic of air conditioner end equipment, just the end-equipment eigenvalue is meant in water flow that flows through terminal heat transmission equipment under certain working condition and the relation between the heat output.The principal element that influences the end-equipment eigenvalue has the operating conditions of equipment, heat exchanger coiled pipe row number, coil pipe type and coil pipe radiating fin form etc.
Traditional temperature control method all is non-linear owing to the influence that does not fully take into account the end-equipment eigenvalue must cause the temperature regulation of target area, this nonlinear degree is also very high under most of situation, therefore must influence the accurate adjusting to the target area temperature;
2. because the temperature control method of traditional general electric control valve of employing is the pressure reduction relationship type, and promptly the output water flow of electric control valve is not only relevant with the aperture of electric control valve, also change relevant with system pressure.For large-scale Heating,Ventilating and Air Conditioning (HVAC) flow-changing water power system, because dynamically hydraulic misadjustment in some cases can be very serious, must cause the fluctuation of system pressure very big, thereby the fluctuation of water flow is also very big, the temperature regulation precision that this will inevitably seriously influence end-equipment causes the degree of regulation variation of conventional electric modulating valve.
The at present known valve of also not finding a kind of controlling method of the linear thermostat valve based on end-equipment eigenvalue and pressure reduction extraneous features value and realizing this method.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of controlling method of the linear thermostat valve based on end-equipment eigenvalue and pressure reduction extraneous features value is provided and realizes the valve of this method.
For achieving the above object, the invention provides a kind of controlling method of linear thermostat valve, it may further comprise the steps:
Step 4, according to peak rate of flow setting value and the end-equipment eigenvalue chosen, obtain the maximum heat output quantity setting value of end-equipment;
Step 5, according to the linear temperature control relation and the maximum heat output quantity setting value of standard input control signal and target area temperature, obtain the dynamic transient heat output quantity of end-equipment setting value;
Step 6, according to end-equipment dynamic transient heat output quantity setting value and end-equipment eigenvalue, obtain dynamic instantaneous water flow setting value;
The present invention also provides the valve of realizing above-mentioned controlling method, comprise modulating valve, be provided with a linear temperature accessory drive in the electric actuator that is positioned at modulating valve top, the input end of this linear temperature accessory drive is connected with the output terminal of pressure difference transmitter by the actuating cable line, and the output terminal of linear temperature accessory drive links to each other with modulating valve; The straight tube linkage section of modulating valve one end is provided with pressure reduction extraneous features value induction installation, and this pressure reduction extraneous features value induction installation is connected with pressure Guan Eryu one pressure difference transmitter by pressure pipe one.
As a kind of improvement of the present invention, described linear temperature accessory drive is made up of linear temperature cascade controller and standard controlling and driving device, and the output terminal of linear temperature cascade controller is connected with the input end of standard controlling and driving device by the actuating cable line.
As a kind of improvement of the present invention, described pressure reduction extraneous features value induction installation adopts the Pitot tubular type, by static pressure impulse pipeline, static pressure experience the hole, total head experiences the hole and total head impulse pipeline is formed; Static pressure impulse pipeline is connected with pressure pipe two, and total head impulse pipeline is connected with pressure pipe one; It is consistent with modulating valve straight tube linkage section central axial direction that total head is experienced the hole central axial direction, and it is vertical with modulating valve straight tube linkage section central axial direction that static pressure is experienced the hole central axial direction.
As a kind of improvement of the present invention, described pressure reduction extraneous features value induction installation adopts orifice fitting, and the orifice plate inlet pressure links to each other with pressure pipe one, and the orifice plate outlet pressure links to each other with pressure pipe two.
As a kind of improvement of the present invention, described electric actuator is a straight journey analog amount electric actuator.
As a kind of improvement of the present invention, described modulating valve is a stop valve type regulating valve.
As a kind of improvement of the present invention, described pressure difference transmitter is installed in the hull outside of electric actuator.
As a kind of improvement of the present invention, described pressure difference transmitter is installed in the enclosure interior of electric actuator.
As a kind of improvement of the present invention, described straight tube linkage section is located at the ingress or the outlet port of modulating valve.
Compared with prior art, the invention has the beneficial effects as follows:
By introducing " end-equipment characteristic value ", and in the linear temperature cascade controller, set up end-equipment characteristic value database, thereby the water flow and the heat output of end-equipment associated exactly; By setting up the relation of heat output and target area temperature variation, and the linear relationship of electric control valve input standard control signal and target area control temperature, thereby set up one-to-one relationship from modulating valve standard input control signal to flow, and pass through the dynamically accurate in good time of flow controlled, thereby realization is to the linear High Accuracy Control of temperature;
By introducing " pressure reduction extraneous features value ", and adopt the double loop tandem to control on the linear temperature cascade controller in electric actuator, major loop is temperature control loop road, target area, secondary ring is the irrelevant characteristic value control loop of pressure reduction, the setting value of pressure reduction extraneous features value control loop adopts the dynamic instantaneous setting value of pressure reduction extraneous features value, and this dynamic setting value is determined jointly by the characteristic of standard input control signal, end-equipment eigenvalue and pressure reduction extraneous features value induction installation.
Pressure reduction extraneous features value has the one-to-one relationship that only becomes dull with the flow of electric control valve, and be not subjected to the technical characteristics of other factors influence of fluctuations, all parameters that satisfies these features can be as pressure reduction extraneous features value, such as pressure reduction, flow velocity or the flow etc. of special position in the modulating valve import and export pipeline, pressure reduction extraneous features value is gathered by corresponding sensor.
Linear thermostat valve based on end-equipment eigenvalue and pressure reduction extraneous features value of the present invention, thereby initiative introducing end-equipment eigenvalue is set up the inner link between modulating valve and the controlled plant, and adopt double loop tandem control by introducing pressure reduction extraneous features value, improved the control accuracy of valve, stability and antijamming capability, therefore the present invention can realize the target area temperature, the highi degree of accuracy linearly adjust of end-equipment heat output, adjusting control mode novelty, cost is lower, the modulating valve structural requirement is simple, circulating resistance is little, improved the overall performance of electric control valve significantly, flow, the temperature control precision height, antijamming capability is strong, the debugging and keep in repair easy, can be widely used in and have higher temperature, the occasion that flow control accuracy requires, and the application of this invention can bring good energy saving effect.
The linear thermostat valve of pressure reduction independent type highi degree of accuracy of the present invention can also be widely applied to flow, temperature, the pressure control of miscellaneous equipment, only needs to require to provide the end-equipment characteristic value data storehouse that meets the demands to get final product according to corresponding apparatus and parameter control.
Description of drawings
Fig. 1 is the structural representation of the linear thermostat valve in the embodiment of the invention;
Fig. 2 is the pitot tube schematic representation.
Embodiment
Fig. 1 and Fig. 2 are a kind of linear thermostat valve embodiment's structures, comprise by modulating valve 9 and the electric actuator 8 that is used to realize the motorized adjustment function.Be provided with pressure reduction extraneous features value induction installation pitot tube 1 in the ingress of modulating valve 9; Pressure difference transmitter 4 is connected with pressure reduction extraneous features value induction installation pitot tube 1 with pressure pipe 23 by pressure pipe 1; In electric actuator 8, be equiped with the linear temperature accessory drive, the input end of this linear temperature accessory drive is connected with the differential pressure measurement signal of pressure difference transmitter 4 outputs and the standard input signal of other higher level's standard controller output respectively, and the output terminal of linear temperature accessory drive is connected with modulating valve 9.Linear temperature accessory drive in the present embodiment is made up of linear temperature cascade controller 6 and standard controlling and driving device 7, and the standard main control signal of linear temperature cascade controller 6 output terminals output is connected with the input end of standard controlling and driving device 7.Electric actuator 8 adopts analog amount straight stroke electric final controlling element, and modulating valve 9 is stop valve type regulating valves; Straight tube linkage section 10 in the present embodiment is installed in the ingress of modulating valve, and straight tube linkage section 10 also can be installed in the outlet port of modulating valve.
The linear temperature cascade controller 6 of straight tube linkage section 10, pressure reduction extraneous features value induction installation 1, pressure difference transmitter 4, electric actuator 8 and inside thereof and the linear thermostat valve of the highi degree of accuracy that standard controlling and driving device 7, modulating valve 9 have constituted the pressure reduction independent type jointly.
Described linear temperature cascade controller 6 is PID-ratio, integration, the derivative controller that can realize the senior calculating of mathematics, and is embedded " end-equipment characteristic value data storehouse " with " a kind of based on end-equipment eigenvalue and pressure reduction extraneous features value realize pressure reduction independent type linear temperature accurately the advance control algorithm of control " advanced procedures.By this program, linear temperature cascade controller 6 outputting standard control signals are to standard controlling and driving device 7, thereby regulate the pressure reduction extraneous features value pitot tube dynamic pressure measurement value at pressure reduction extraneous features value induction installation pitot tube 1 place by the aperture that changes modulating valve 9, make it consistent, so just realized the linear accurately control of the pressure reduction independent type of target area temperature with dynamic instantaneous setting value.
For the linear thermostat valve of pressure reduction independent type of the present invention, the input signal of linear temperature cascade controller 6 is the standard control signals from higher controller.
The accurate input control signal of bidding be (Xmin, Xmax), then (Xmin is (0-10V), (2-10V), (0-20mA) or (4-20m A) etc. Xmax), establishes instantaneous standard input control signal X, Δ X=X-Xmin;
If the target area setting temperature is Ts, the actual measurement temperature is T, then temperature departure Δ T=T-Ts.
According to the linearity control requirement of standard input control signal and target area temperature, then:
Δ T=K1 * Δ X, wherein K1 is linear temperature coefficient (I)
The pass of end-equipment heat output W and target area temperature variation Δ T ties up to when air such as is at wet variation to be had:
W=(1.01+1.84 * d) * Q
Air* Δ T
Wherein d is the water content of air, Q
AirBe the mass flow rate of air, in certain air conditioner surroundings, be definite value, so following formula can be reduced to:
W=K2 * Δ T, wherein K2 is a linear heat output coefficient (II)
For wet variation such as non-grade, we can obtain by the K2 parameter is revised, so following formula all is suitable for wet variation such as non-grade for grade is wet.
The water flow Q and the relation between the heat output W of terminal air-conditioning equipment are that the end-equipment eigenvalue can record data by experiment under certain air conditioning condition, obtain the relation function curve by methods of numerical then, and note is W=f (Q)
Owing to be dull one-to-one relationship between the water flow Q of terminal air-conditioning equipment and the heat output W, there is inverse function, its inverse function is Q=f
-1(W) (III)
Bringing (I), (II) into (III) gets:
Q＝f
-1(K2×K1×ΔX)
Get dynamic instantaneous flow setting value QS formula after the simplification:
QS=f
-1(K * Δ X), wherein K is linearity control coefficient (IV)
K＝f(Qmax)/ΔXmax????(V)
Because pressure reduction extraneous features value PI becomes dull one-to-one relationship with water flow Q, note is Q=g (PI),
, its inverse function is: PI=g
-1Q},
Bring into (IV), (V) the dynamic instantaneous setting value PIs formula of pressure reduction extraneous features value:
PIs＝g
-1{f
-1(f(Qmax)×ΔX/ΔXmax)}?????(VI)
In the formula
(1), g
-1{ } is pressure reduction extraneous features value inverse function, determined by the characteristic and the position of pressure reduction extraneous features value induction installation;
(2), f
-1() is end-equipment eigenvalue inverse function, records dissimilar and end-equipment flow and heat output operating mode by experiment, obtains function relation by methods of numerical, is embedded in the end-equipment characteristic value data storehouse of linear temperature cascade controller 6;
(3), Qmax is the maximum flow of setting, this flow is set in linear temperature cascade controller 6 as required by the client;
(4), f (Qmax) is the maximum heat output of setting;
(5), Δ X is input signal, Δ Xmax is the input signal bandwidth;
Obviously, formula (VI) is exactly to the present invention is based on " end-equipment eigenvalue " and " pressure reduction extraneous features value " to realize the accurately senior electric valve control algorithm of control of pressure reduction independent type linear temperature.
When pressure reduction independent type linear temperature accurate adjustment valve is accepted standard input control signal Δ X and is started working, the pressure reduction extraneous features value induction installation pitot tube 1 that is positioned at the electric control valve ingress is gathered pressure reduction extraneous features value parameter PI, and convert to by pressure difference transmitter 4 and to measure the measurement signal input end that electrical signal is transported to linear temperature cascade controller 6, compare by the dynamic instantaneous setting value PIs of pressure reduction extraneous features value that pressure reduction independent type linear temperature advance control algorithm draws with standard input control signal Δ X, and by the PID-ratio, integration, the control algorithm of differential, the aperture that the outputting standard control signal is removed regulating and controlling valve 9 to standard controlling and driving device 7, adjust measured value and make it consistent, so just realized the linearity control requirement of pressure reduction independent type with dynamic instantaneous setting value.
Described linear temperature cascade controller 6 is positioned at electric actuator 9, is a kind of embedded " end-equipment characteristic value data storehouse " with " pressure reduction independent type linear temperature Advanced Control program " the Advanced Control device product of special exploitation.
When the standard input control signal X that comes from higher controller gives regularly, correspondingly also determine with deviation delta X minimum input control signal Xmin thereupon:
Selected end-equipment eigenvalue f in " the end-equipment characteristic value data storehouse " of linear temperature cascade controller 6
-1(), and set maximum and set flow Qmax, calculate according to formula (VI) then that the dynamic instantaneous setting value PIs of pressure reduction extraneous features value---this dynamic setting value changes with the variation of standard input control signal X, when there is deviation in the pressure reduction extraneous features value measured value PI of pressure reduction extraneous features value induction installation pitot tube 1 collection, by linear temperature cascade controller 6 in-built PID-ratio, integration, differential control algorithm output control signal goes to change the aperture of electric control valve, pressure reduction extraneous features value is carried out dynamic adjustments, make it automatically to be constant at dynamic instantaneous setting value, thereby the linear temperature of realizing the pressure reduction independent type is controlled accurately.
The calculating and the control flow of the linear thermostat valve of pressure reduction independent type of the present invention are as follows:
A kind of controlling method of the linear thermostat valve based on end-equipment eigenvalue and pressure reduction extraneous features value, it may further comprise the steps:
Step 4, according to peak rate of flow setting value and the end-equipment eigenvalue chosen, obtain the maximum heat output quantity setting value of end-equipment;
Step 5, according to the linear temperature control relation and the maximum heat output quantity setting value of standard input control signal and target area temperature, obtain the dynamic transient heat output quantity of end-equipment setting value;
Step 6, according to end-equipment dynamic transient heat output quantity setting value and end-equipment eigenvalue, obtain dynamic instantaneous water flow setting value;
The linear thermostat valve of pressure reduction independent type of the present invention specifically is exemplified below:
The standard input control signal of electric actuator 8 neutral line temperature cascade controllers 6 is 4～20m A, and the specification of modulating valve 9 is DN100, and peak rate of flow setting value Qmax is set at 64m
3/ h.Pressure reduction extraneous features value induction installation 1 is a pitot tube, pitot tube is positioned at modulating valve 9 straight tube linkage sections 10, it is consistent with straight tube linkage section axial direction that its total head is experienced the axial direction in hole 13, the axial direction that static pressure is experienced hole 14 is vertical with straight tube linkage section axial direction, and then pressure reduction extraneous features value function g{} is:
Q
S＝K
Q×A×SQRT(ΔP
S/(2×ρ)????(VII)
In the formula: (1), Q
SBe the instantaneous setting value of flow dynamics;
(2), K
QBe the flow correction coefficient, be made as 1 herein;
(3), A is the interior cross-section area of modulating valve straight tube linkage section, internal diameter is 0.1m, A=7.854 * 10
-3(m
2)
(4), Δ P
SBe the dynamic instantaneous setting value of pitot tube dynamic pressure, also be the dynamic instantaneous setting value PI of pressure reduction extraneous features value herein
S
(5), ρ is the density of fluid, ρ=1000Kg/m
3
To (VII) formula simplify pressure reduction extraneous features value inverse function g
-1{ } is as follows:
PI
S＝ΔP
S＝2.50176×10
-3×Q
s 2?????(VIII)
Wherein PIs unit is KPa, and Q unit is m
3/ h
Many group ends of storage apparatus characteristic value inverse function f in the end-equipment characteristic value data storehouse of linear temperature cascade controller 6
-1() chooses one of them according to the characteristic of actual end equipment, its initial data obtain and the process of numerical analysis as follows:
Such end-equipment experimentizes under certain operating mode, and the flow that obtains and the relation data of heat output see the following form:
| Water flow (m3/h) | ??6.4 | ??12.8 | ??19.2 | ??25.6 | ??32.0 | ??38.4 | ??44.8 | ??51.2 | ??57.6 | ??64.0 |
| Heat output (KW) | ??76.1 | ??136.0 | ??185.2 | ??226.0 | ??260.1 | ??288.9 | ??313.6 | ??335.0 | ??354.0 | ??371.0 |
Obtain the inverse function f of end-equipment eigenvalue function by methods of numerical
-1() is
QS＝f
-1(f(Qmax)×ΔX//ΔXmax)
＝64×(1+2.3026×Φ+2.6509×Φ
2+2.0347×Φ
3+1.1713×Φ
4+0.5394×Φ
5)????(IX)
Φ=Δ X/ Δ Xmax-1 wherein
Then according to above formula (VI～IX), can obtain the advance control algorithm result of following table:
| Instantaneous standard input control signal X (m A) | ??6 | ??8 | ??10 | ??12 | ??14 | ??16 | ??18 | ??20 | ??22 | ??24 |
| ??ΔX＝X-Xmin | ??2 | ??4 | ??6 | ??8 | ??10 | ??12 | ??14 | ??16 | ??18 | ??20 |
| ??Φ＝ΔX/ΔXmax-1 | ??-0.9 | ??-0.8 | ??-0.7 | ??-0.6 | ??-0.5 | ??-0.4 | ??-0.3 | ??-0.2 | ??-0.1 | ??0 |
| The dynamic setting value Ws of heat output (KW) | ??37.1 | ??74.2 | ??111.3 | ??148.4 | ??185.5 | ??222.6 | ??259.7 | ??296.8 | ??333.9 | ??371 |
| Dynamic instantaneous flow setting value Qs (m3/h) | ??2.66 | ??7.41 | ??11.51 | ??15.56 | ??20.06 | ??25.43 | ??32.07 | ??40.38 | ??50.84 | ??64.00 |
| The dynamic instantaneous setting value Δ Ps of pitot tube dynamic pressure (KPa) | ??0.018 | ??0.137 | ??0.331 | ??0.606 | ??1.007 | ??1.618 | ??2.572 | ??4.079 | ??6.466 | ??10.247 |
As seen from the above table, corresponding standard input signal 20m A, its maximum heat output quantity setting value reaches 371KW, and the peak rate of flow setting value is 64m
3/ h, pressure reduction extraneous features value is that the dynamic instantaneous setting value of pitot tube dynamic pressure is 10.247KPa, corresponding to each input control signal, all there is the dynamic instantaneous setting value of unique maximum heat output quantity setting value, peak rate of flow setting value and pitot tube dynamic pressure corresponding with it, this shows that this control algorithm can make things convenient for, provide in good time, exactly high-precision pressure reduction independent type linear temperature control.
For pressure reduction extraneous features value induction installation 1 is orifice plate, only needs pressure reduction extraneous features value inverse function formula g
-1{ } (formula VIII) changes into: PI
S=Δ P
S=100 * Q
S 2/ K
v 2
K wherein
VFlow coefficient for orifice plate
The present invention also has a lot of distortion except that above embodiment, all the elements that every industry technician can go out according to above disclosed content direct derivation or association, and all should be considered as is protection scope of the present invention.
Claims (10)
1. the controlling method of a linear thermostat valve may further comprise the steps:
Step 1, according to the characteristic of end-equipment, in the end-equipment characteristic value data storehouse in can realizing the linear temperature cascade controller (6) of senior calculating of mathematics and pid control algorithm, select corresponding end-equipment eigenvalue;
Step 2, in linear temperature cascade controller (6), require to select the peak rate of flow setting value according to end-equipment;
Step 3, read in the standard input control signal of the standard output signals of higher controller as linear temperature cascade controller (6);
Step 4, according to peak rate of flow setting value and the end-equipment eigenvalue chosen, obtain the maximum heat output quantity setting value of end-equipment;
Step 5, according to the linear temperature control relation and the maximum heat output quantity setting value of standard input control signal and target area temperature, obtain the dynamic transient heat output quantity of end-equipment setting value;
Step 6, according to end-equipment dynamic transient heat output quantity setting value and end-equipment eigenvalue, obtain dynamic instantaneous water flow setting value;
Step 7, according to the characteristic of dynamic instantaneous water flow setting value and pressure reduction extraneous features value induction installation (1), obtain the dynamic instantaneous setting value of pressure reduction extraneous features value;
Step 8, the measured value that dynamic instantaneous setting value and process pressure reduction extraneous features value induction installation (1), the pressure difference transmitter (4) of pressure reduction extraneous features value are gathered compare, and the control algorithm by PID, the action of regulating and controlling valve (9) in the standard controlling and driving device (7) of outputting standard control signal in the electric actuator (8).
2. valve of realizing the described controlling method of claim 1, comprise modulating valve (9), it is characterized in that: be provided with a linear temperature accessory drive in the electric actuator (8) that is positioned at modulating valve (9) top, the input end of this linear temperature accessory drive is connected by the output terminal of actuating cable line (5) with pressure difference transmitter (4), and the output terminal of linear temperature accessory drive links to each other with modulating valve (9); The straight tube linkage section (10) of modulating valve (9) one ends is provided with pressure reduction extraneous features value induction installation (1), and this pressure reduction extraneous features value induction installation (1) is connected with a pressure difference transmitter (4) with pressure pipe two (3) by pressure pipe one (2).
3. valve according to claim 2, it is characterized in that: described linear temperature accessory drive is made up of linear temperature cascade controller (6) and standard controlling and driving device (7), and the output terminal of linear temperature cascade controller (6) is connected with the input end of standard controlling and driving device (7) by actuating cable line (5).
4. valve according to claim 2, it is characterized in that: described pressure reduction extraneous features value induction installation (1) adopts the Pitot tubular type, by static pressure impulse pipeline (12), static pressure experience hole (14), total head experiences hole (13) and total head impulse pipeline (11) is formed; Static pressure impulse pipeline (12) is connected with pressure pipe two (3), and total head impulse pipeline (11) is connected with pressure pipe one (2); It is consistent with modulating valve (9) straight tube linkage section (10) central axial direction that total head is experienced hole (13) central axial direction, and it is vertical with modulating valve (9) straight tube linkage section (10) central axial direction that static pressure is experienced hole (14) central axial direction.
5. valve according to claim 2 is characterized in that, described pressure reduction extraneous features value induction installation (1) adopts orifice fitting, and the orifice plate inlet pressure links to each other with pressure pipe one (2), and the orifice plate outlet pressure links to each other with pressure pipe two (3).
6. valve according to claim 2 is characterized in that, described electric actuator (8) is a straight journey analog amount electric actuator.
7. valve according to claim 2 is characterized in that, described modulating valve (9) is a stop valve type regulating valve.
8. valve according to claim 2 is characterized in that, described pressure difference transmitter (4) is installed in the hull outside of electric actuator (8).
9. valve according to claim 2 is characterized in that, described pressure difference transmitter (4) is installed in the enclosure interior of electric actuator (8).
10. valve according to claim 2 is characterized in that, described straight tube linkage section (10) is located at the ingress or the outlet port of modulating valve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810180059A CN101737554A (en) | 2008-11-21 | 2008-11-21 | Control method of linear temperature control valve and valve implementing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810180059A CN101737554A (en) | 2008-11-21 | 2008-11-21 | Control method of linear temperature control valve and valve implementing same |
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| CN101737554A true CN101737554A (en) | 2010-06-16 |
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ID=42461424
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605744A (en) * | 2016-02-28 | 2016-05-25 | 广州市设计院 | Fan coil temperature control device matched with pipe diameter of water pipe and used for controlling opening of water valve |
| CN112709859A (en) * | 2020-12-21 | 2021-04-27 | 广西中烟工业有限责任公司 | Valve opening control method and device, electronic equipment and storage medium |
| CN113932060A (en) * | 2021-10-09 | 2022-01-14 | 宜昌南玻光电玻璃有限公司 | Accurate regulation and control SO in ultra-thin electronic glass flue gas2Method of concentration |
| CN114680372A (en) * | 2022-05-26 | 2022-07-01 | 南华大学 | Pneumatic conveying control method, computer readable medium, pneumatic conveying control system and tobacco shred pneumatic conveying system |
-
2008
- 2008-11-21 CN CN200810180059A patent/CN101737554A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605744A (en) * | 2016-02-28 | 2016-05-25 | 广州市设计院 | Fan coil temperature control device matched with pipe diameter of water pipe and used for controlling opening of water valve |
| CN112709859A (en) * | 2020-12-21 | 2021-04-27 | 广西中烟工业有限责任公司 | Valve opening control method and device, electronic equipment and storage medium |
| CN112709859B (en) * | 2020-12-21 | 2022-07-19 | 广西中烟工业有限责任公司 | Valve opening control method and device, electronic equipment and storage medium |
| CN113932060A (en) * | 2021-10-09 | 2022-01-14 | 宜昌南玻光电玻璃有限公司 | Accurate regulation and control SO in ultra-thin electronic glass flue gas2Method of concentration |
| CN113932060B (en) * | 2021-10-09 | 2024-06-07 | 宜昌南玻光电玻璃有限公司 | Accurate regulation and control of SO in ultra-thin electronic glass flue gas2Concentration method |
| CN114680372A (en) * | 2022-05-26 | 2022-07-01 | 南华大学 | Pneumatic conveying control method, computer readable medium, pneumatic conveying control system and tobacco shred pneumatic conveying system |
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Open date: 20100616 |