CN204855045U - Flow test device's pressure and two closed loop control system of velocity of flow - Google Patents
Flow test device's pressure and two closed loop control system of velocity of flow Download PDFInfo
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- CN204855045U CN204855045U CN201520611584.6U CN201520611584U CN204855045U CN 204855045 U CN204855045 U CN 204855045U CN 201520611584 U CN201520611584 U CN 201520611584U CN 204855045 U CN204855045 U CN 204855045U
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- velocity
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000007689 inspection Methods 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 abstract description 2
- 238000012795 verification Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000008400 supply water Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model discloses a flow test device's pressure and two closed loop control system of velocity of flow, pressure control closed loop system is constituteed to constant temperature water tank, water supply unit, constant voltage control acquisition sensor, pressure automatic control regulator and host computer, when the skew set pressure of pressure control closed loop system operating pressure, constant voltage control acquisition sensor delivers to pressure automatic control regulator and host computer respectively with pressure signal, examine table device, velocity of flow state acquisition sensor, craspedodrome journey flow control valve, flow rate control executor and host computer and constitute flow control closed loop system, when the skew settlement velocity of flow of the flow control closed loop system work velocity of flow, flow rate control executor and host computer are delivered to with velocity of flow signal to velocity of flow state acquisition sensor. The utility model discloses guaranteed that water supply pressure and work invariable or complement one another the velocity of flow time, realized device bulk reduction, the accurate control of energy saving, realized that the velocity of flow stability of device working medium water reaches < 0.5%.
Description
Technical field
The utility model relates to device for testing flow technical field, particularly relates to a kind of pressure and flow velocity double closed-loop control system of device for testing flow.
Background technology
At present, heat metering reform is generally implemented in the northern area of China, the manufacturing enterprise of calorimeter and the metrological service that calorimeter implements compulsory verification is first got more and more, also increasing to the demand of heat meter calibrating apparatus, because calorimeter device to apply the history of only more than ten years in China, so most device adopts the change of buffer tank voltage stabilizing controlled pressure, the majority adopting variable frequency control is opened loop control, control by setting a fixing frequency, all there is certain problem technically in these, cause flow control unstable, have impact on accuracy of measurement, thus be difficult to ensure product quality.
Separately, according to EN1434-2015 (European calorimeter standard) and new national standard, implementing endurancing to calorimeter, equally also there is above-mentioned defect in its device; Also Similar Problems is there is in water meter industry.The utility model proposes a kind of pressure and flow velocity double closed-loop control system of device for testing flow, flow rate control accuracy is increased substantially, also improves the accuracy of measurement of test unit simultaneously.
Utility model content
Based on the technical matters that background technology exists, the utility model proposes a kind of pressure and flow velocity double closed-loop control system of device for testing flow.
The pressure of a kind of device for testing flow that the utility model proposes and flow velocity double closed-loop control system, comprise constant temperature water tank, water supplying unit, Isobarically Control pick-up transducers, pressure automatic control regulator, inspection meter apparatus, flow rate regime pick-up transducers, Direct Travel flow control valve, flow control actuator and host computer;
Constant temperature water tank, water supplying unit, Isobarically Control pick-up transducers, pressure automatic control regulator and host computer decomposition pressure Control loop system; When Stress control closed-loop system working pressure departs from set pressure, pressure signal is delivered to pressure automatic control regulator and host computer by Isobarically Control pick-up transducers respectively, host computer changes the frequency driving water pump in water supplying unit by pressure automatic control regulator, by changing pump rotary speed, reaching change water thrust of pump and making Stress control closed-loop system pressure stability in the deviation range that set pressure allows;
Inspection meter apparatus, flow rate regime pick-up transducers, Direct Travel flow control valve, flow control actuator and host computer composition flow control closed-loop system; When flow control closed-loop system working flow rate departs from setting flow velocity, flow velocity signal is delivered to flow control actuator and host computer by flow rate regime pick-up transducers, host computer controls Direct Travel flow control valve by flow control actuator, makes flow control closed-loop system flow speed stability in the deviation range that setting flow velocity allows.
Preferably, Isobarically Control pick-up transducers adopts pressure unit.
Preferably, flow rate regime pick-up transducers adopts electromagnetic flowmeter.
Preferably, flow control actuator adopts flow regulator.
The pressure of a kind of device for testing flow that the utility model proposes and flow velocity double closed-loop control system, Stress control closed-loop system uses closed loop constant pressure frequency conversion control technology, make pressure of supply water more stable, ensure pipeline for water loops water pressure smoothness in the scope preset, thus ensure that the constant of verification and experiment device flow velocity.Flow control closed-loop system uses automatic flow velocity closed-loop control, in verification and experiment process, only need set calibrating required flow rate numerical value, automatic control mathematical model coutroi velocity value and setting value is used to keep being close to consistent minimum difference by host computer, form the control to flow velocity thus, coordinate flow control P, the I of high precision design, the flow regulator of D-algorithm, realize the Automatic Control of instantaneous delivery.Stress control closed-loop system coordinates with flow control closed-loop system and makes the utility model be much higher than conventional equipment more than 50% in flow control quality, improves the accuracy of measurement of test unit.
The utility model be used for " heat energy " count (surveys) amount calorimeter implement inspection (determining) time calibrating installation used adopt a kind of to flow velocity enforcement double-closed-loop control system, also be applicable to the flux experiment such as calorimeter endurance test apparatus, apparatus for calibrating water meter device simultaneously, when working for guaranteed flow experimental provision (as heat meter calibrating apparatus), the flow velocity of fluid media (medium) water is in stable standard state, with the accuracy of warranty test and verification result.The utility model is by the double-closed-loop control to pressure of supply water and working flow rate, constant or complement one another while ensure that pressure of supply water and working flow rate, achieve that device volume reduces, economize energy controls accurately, the flow speed stability degree achieving device working medium water reaches < 0.5%.
Accompanying drawing explanation
Fig. 1 is the pressure of a kind of device for testing flow that the utility model proposes and the structured flowchart of flow velocity double closed-loop control system.
Fig. 2 is the pressure of a kind of device for testing flow that the utility model proposes and the structural representation of flow velocity double closed-loop control system application of heat table calibrating installation.
In figure: 1, refrigeration unit, 2, well heater, 3, cryogenic media/high-temperature medium case, 4, manual ball valve, 5, variable frequency pump, 6, frequency converter, 7, pressure unit, 8, electronic gas control water intaking valve, 9, heat meter calibration testing table, 10, electromagnetic flowmeter, 11, electropneumatic ball valve, 12, automatically controlled fast positioning and adjustment valve, 13, visor, 14, electropneumatic valve, 15, temperature sensor.
Embodiment
As shown in Figure 1-2, Fig. 1 is the pressure of a kind of device for testing flow that the utility model proposes and the structured flowchart of flow velocity double closed-loop control system; Fig. 2 is the pressure of a kind of device for testing flow that the utility model proposes and the structural representation of flow velocity double closed-loop control system application of heat table calibrating installation.
With reference to Fig. 1, the pressure of a kind of device for testing flow that the utility model proposes and flow velocity double closed-loop control system, comprise constant temperature water tank, drive water pump, pressure unit, pressure automatic control regulator, examine meter apparatus, electromagnetic flowmeter, Direct Travel flow control valve, flow regulator and host computer;
Constant temperature water tank, driving water pump, pressure unit, pressure automatic control regulator and host computer decomposition pressure Control loop system; When Stress control closed-loop system working pressure departs from set pressure, pressure signal is delivered to pressure automatic control regulator and host computer by pressure unit respectively, host computer changes the frequency driving water pump by pressure automatic control regulator, by changing pump rotary speed, reaching change and driving water thrust of pump to make Stress control closed-loop system pressure stability in the deviation range that set pressure allows;
Inspection meter apparatus, electromagnetic flowmeter, Direct Travel flow control valve, flow regulator and host computer composition flow control closed-loop system; When flow control closed-loop system working flow rate departs from setting flow velocity, flow velocity signal is delivered to flow regulator and host computer by electromagnetic flowmeter, host computer controls Direct Travel flow control valve by flow regulator, makes flow control closed-loop system flow speed stability in the deviation range that setting flow velocity allows.
With reference to Fig. 2, pressure and the flow velocity double closed-loop control system of a kind of device for testing flow that the utility model proposes are applied to heat meter calibrating apparatus, comprise cryogenic media/high-temperature medium case 3, cryogenic media/high-temperature medium case 3 is provided with refrigeration unit 1, well heater 2 and temperature sensor 15, cryogenic media/high-temperature medium case 3 water side manually ball valve 4, variable frequency pump 5, pressure unit 7, the entrance point of electronic gas control water intaking valve 8 and heat meter calibration testing table 9, the electromagnetic flowmeter 10 of heat meter calibration testing table 9 endpiece by connecting successively, electropneumatic ball valve 11, automatically controlled fast positioning and adjustment valve 12, visor 13, electropneumatic valve 14 is connected with cryogenic media/high-temperature medium case 3 water inlet end.Variable frequency pump 5 is connected with frequency converter 6, frequency converter 6 and pressure unit 7 are connected in parallel and are connected with electromagnetic flowmeter 10, automatically controlled fast positioning and adjustment valve 12 respectively afterwards.
With reference to Fig. 2, cryogenic media/high-temperature medium case 3, variable frequency pump 5, pressure unit 7, heat meter calibration testing table 9 and automatically controlled fast positioning and adjustment valve 12 decomposition pressure Control loop system, use constant pressure frequency conversion control technology, make pressure of supply water more stable, ensure that pipeline supplies water this loop discharge smoothness in the scope required, thus ensure that the constant of heat meter calibrating apparatus flow velocity.Heat meter calibration testing table 9, electromagnetic flowmeter 10, electropneumatic ball valve 11 and electropneumatic valve 14 form flow control closed-loop system, realize the Automatic Control of instantaneous delivery, in verification process, only need set calibrating required flow rate numerical value, use automatic control mathematical model coutroi velocity value and setting value to keep being close to consistent minimum difference by heat meter calibrating apparatus, formed thus flow Control loop Systematical control.
Due to flow regulation have influence on pressure change time, Stress control closed-loop system meeting follow-up in time coordinates with flow control closed-loop system carries out system pressure adjustment, both effect distribution are determined by control algolithm by the change numerical value of host computer by two parameter, the final flow speed stability < 0.5% ensureing the working medium water of calibrating installation.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection domain of the present utility model.
Claims (4)
1. the pressure of a device for testing flow and flow velocity double closed-loop control system, it is characterized in that, comprise constant temperature water tank, water supplying unit, Isobarically Control pick-up transducers, pressure automatic control regulator, inspection meter apparatus, flow rate regime pick-up transducers, Direct Travel flow control valve, flow control actuator and host computer;
Constant temperature water tank, water supplying unit, Isobarically Control pick-up transducers, pressure automatic control regulator and host computer decomposition pressure Control loop system; When Stress control closed-loop system working pressure departs from set pressure, pressure signal is delivered to pressure automatic control regulator and host computer by Isobarically Control pick-up transducers respectively, and host computer changes the frequency driving water pump in water supplying unit by pressure automatic control regulator;
Inspection meter apparatus, flow rate regime pick-up transducers, Direct Travel flow control valve, flow control actuator and host computer composition flow control closed-loop system; When flow control closed-loop system working flow rate departs from setting flow velocity, flow velocity signal is delivered to flow control actuator and host computer by flow rate regime pick-up transducers, and host computer controls Direct Travel flow control valve by flow control actuator.
2. the pressure of device for testing flow according to claim 1 and flow velocity double closed-loop control system, is characterized in that, Isobarically Control pick-up transducers adopts pressure unit.
3. the pressure of device for testing flow according to claim 1 and flow velocity double closed-loop control system, is characterized in that, flow rate regime pick-up transducers adopts electromagnetic flowmeter.
4. the pressure of device for testing flow according to claim 1 and flow velocity double closed-loop control system, is characterized in that, flow control actuator adopts flow regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520611584.6U CN204855045U (en) | 2015-08-14 | 2015-08-14 | Flow test device's pressure and two closed loop control system of velocity of flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520611584.6U CN204855045U (en) | 2015-08-14 | 2015-08-14 | Flow test device's pressure and two closed loop control system of velocity of flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855045U true CN204855045U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520611584.6U Expired - Fee Related CN204855045U (en) | 2015-08-14 | 2015-08-14 | Flow test device's pressure and two closed loop control system of velocity of flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204855045U (en) |
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2015
- 2015-08-14 CN CN201520611584.6U patent/CN204855045U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Flow test device pressure and flow velocity double closed loop control system Effective date of registration: 20180712 Granted publication date: 20151209 Pledgee: Industrial Bank Limited by Share Ltd. Quanzhou branch Pledgor: QUANZHOU CHIYOUNG INSTRUMENT Co.,Ltd. Registration number: 2018350000061 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200615 Granted publication date: 20151209 Pledgee: Industrial Bank Limited by Share Ltd. Quanzhou branch Pledgor: QUANZHOU CHIYOUNG INSTRUMENT Co.,Ltd. Registration number: 2018350000061 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |