CN201364194Y - Liquid flow test device - Google Patents

Liquid flow test device Download PDF

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Publication number
CN201364194Y
CN201364194Y CNU2009201136751U CN200920113675U CN201364194Y CN 201364194 Y CN201364194 Y CN 201364194Y CN U2009201136751 U CNU2009201136751 U CN U2009201136751U CN 200920113675 U CN200920113675 U CN 200920113675U CN 201364194 Y CN201364194 Y CN 201364194Y
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CN
China
Prior art keywords
test
test unit
fluid flow
unit
switch valve
Prior art date
Application number
CNU2009201136751U
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Chinese (zh)
Inventor
汤思孟
孙梦翔
马俊
Original Assignee
宁波市计量测试所(宁波市衡器管理所)
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Priority to CNU2009201136751U priority Critical patent/CN201364194Y/en
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Publication of CN201364194Y publication Critical patent/CN201364194Y/en

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Abstract

The utility model relates to a liquid flow test device, a test channel of the test device is a sealed channel in which a liquid flows, a volumetric method test device and a mass method test device composed of a stabilization liquid source 4, a pressure transmitter 9, a detected epi-position 10, a pressure transmitter 11, a high-precision automatic regulating valve 13, an electromagnetic flow meter 15 and the like, as well as a mode change-over valve A16, a commutator 18, a standard container 19 and an electronic weigher 21 are disposed on the test channel sequentially. A PLC disposed in a built-in electric cabinet 24 realizes signal acquisition and control of liquid flow in the test channel, a CPU disposed in a touch screen 14 realizes data exchange and processing of flow signals in the test channel, and the touch screen 14 controls and displays results of data exchange and processing. The multifunctional liquid flow test device combines four detection methods into one.

Description

A kind of fluid flow test unit
Technical field
The utility model relates to a kind of fluid flow test unit, further says, the utility model is based on detecting flow detection that pressure reduction that restriction device produced carries out liquid, and can detecting or the device of verification by volumetric method or mass method.
Background technology
As everyone knows, traditional liquid pilot device is that flow of liquid enters standard measuring device by tested throttling element, closing control valve when reaching certain water level, reading the expression value of standard measuring device and the counting of tested throttling element compares, determine the error of indication of tested throttling element with this, the advantage of this kind method is simple and convenient, accurately and reliably, shortcoming be detection time long, detection efficiency is low.Development along with electronic technology and sensor technology, a kind of hydrodynamic formula pressure differential detection method is very ripe, its principle is when the tested throttling element of fluid in pipeline, fluid will form local contraction at the throttling element place, thereby the flow velocity increase, static pressure reduces, so produced pressure reduction before and after tested throttling element, utilize the front and back pressure unit of tested throttling element to detect this pressure reduction, thereby weigh the size of flow.The Chinese patent of publication number CN2729662Y (application number is 200420069540.7) discloses the dynamic auto pick-up unit of a kind of tandem water meter.It is made up of voltage stabilizing water source, test section, normal flow sensor, control valve, photosignal sampler, signals collecting control and computer data processing system.Current by the voltage stabilizing water source through test section flow through in order detected table, normal flow sensor and control valve.When waterflow stabilization flowed, the flow signal that the signal acquisition controller dynamic synchronization is gathered tested throttling element and normal flow sensor was sent to computer system and carries out data processing, and testing result forms report automatically.The beneficial effect of this patent is the dynamic auto detection that has realized tested throttling element, has efficient height, characteristics that cost is low.But this device exists reliability and poor accuracy, function singleness, and the normal flow sensor is difficult for verification, obstruction, leakage, burn into distorted signals that the impulse pipeline produced easily influence shortcomings such as measuring accuracy.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the utility model provides a kind of fluid flow test unit, have one be preset the flow pressure measurement poor, the 2nd, preset pressure reduction measurement of discharge, the 3rd, volumetric method of measuring discharge amount, the 4th, the full-service fluid device for testing flow that four kinds of methods of mass method measurement of discharge are integrated.
The utility model realizes that the technical scheme of above-mentioned purpose is: a kind of fluid flow test unit, the pilot passageway of described test unit is the seal channel that an intersegmental part has liquid flow, the voltage stabilizing fluid supply is set on described pilot passageway in order, temperature transmitter, electromagnetic switch valve, pressure unit, binding clasp, pressure unit, tested epi-position, pressure unit, pressure unit, High Precision Automatic variable valve, electromagnetic flowmeter, by being arranged on signals collecting and the control that PLC in the built-in electric control case realizes the fluid flow in the described pilot passageway, realize the exchanges data and the processing of flow signal in the described pilot passageway by being located at CPU in the touch-screen, the result of touch-screen control and video data exchange and processing is characterized in that: also be provided with on the described pilot passageway and comprise mode switch valve A, commutator, the volumetric method test unit that standard measuring device is formed; And be provided with and comprise that mode switch valve A, commutator, standard measuring device, electronic-weighing think highly of the mass method test unit that device is formed.
Be provided with mode switch valve B between described electromagnetic flowmeter and the mode switch valve A.
Realize the signals collecting and the control of the fluid flow in described volumetric method test unit and the mass method test unit by the PLC that is arranged on the built-in electric control case.
Realize the exchanges data and the processing of the fluid flow rate signal in described volumetric method test unit and the mass method test unit, the result of screen displaying exchanges data and processing by the CPU that is arranged on touch-screen.
Described standard measuring device is two at least.
Compared with prior art, the invention has the advantages that: a whole set of fluid flow test unit is thought highly of device four parts by pressure unit, electromagnetic flowmeter, standard measuring device and electronic-weighing and is formed sampling system and form four kinds of test methods, not only can adopt method of standard table to test tested throttling element, and can adopt volumetric method, mass method to test tested table and demarcation standard electric magnetic flowmeter, make the diversification more of its function.
Description of drawings
Fig. 1 is the synoptic diagram of a kind of fluid flow test unit of the present invention.
Among the figure: 1. built-in fluid box, 2. low noise liquid pump, 3. blowoff valve, 4. voltage stabilizing fluid supply, 5. temperature transmitter 6. electromagnetic switch valves 7. pressure units, 8. binding clasp, 9. pressure unit, 10. tested epi-position, 11. pressure units, 12. pressure unit, 13. High Precision Automatic variable valve, 14. touch-screens (in CPU is arranged), 15. electromagnetic flowmeters, 16. mode switch valve A, 17. mode switch valve B, 18. commutators, 19. standard measuring devices, 20. draining valve, 21. the electronic scale treasure, 22. temperature-controlled water intake valves, 23.. temperature control draining valve, 24. built-in electric control case (in PLC is arranged), 25. built-in tool casees.
Specific embodiments
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, be a kind of synoptic diagram of fluid flow test unit.Temperature transmitter 5 is equipped with on voltage stabilizing fluid supply 4 tops, blowoff valve 3 is equipped with in the bottom, the liquid of voltage stabilizing fluid supply 4 enters pilot passageway by outlet, electromagnetic switch valve 6, pressure unit 7, binding clasp 8, pressure unit 9, tested epi-position 10, pressure unit 11, pressure unit 12, High Precision Automatic variable valve 13, electromagnetic flowmeter 15 are set on the described pilot passageway in order, and 21, two standard measuring device 19 bottoms of mode switch valve A16, commutator 18, standard measuring device 19, electronic scale treasure that are provided with are provided with draining valve 20.Liquid during test in the voltage stabilizing fluid supply 4 is by the said apparatus on the pilot passageway.Flow out to built-in fluid box 1 by draining valve 20 after the off-test, or directly enter built-in fluid box 1 by mode switch valve B17, pump in the voltage stabilizing fluid supply 4 circulation by low sound level pump 2 again, built-in fluid box 1 also is equipped with temperature-controlled water intake valve 22 and temperature-control water outlet valve 23 to replenish or discharged liquid.
By being arranged on signals collecting and the control that PLC in the built-in electric control case 24 realizes the fluid flow in the described pilot passageway, realize the exchanges data and the processing of fluid flow in the described pilot passageway, exchange of touch-screen 14 video datas and the result who handles by being located at CPU in the touch-screen 14.
When the fluid flow test unit detected throttling element at tested epi-position 10 places, mode switch valve A16 closed, and mode switch valve B17 opens, and it has following two kinds of test methods:
1. preset the loss of flow measuring pressure.When waterflow stabilization flows, according to the instantaneous delivery Q that presets in advance, by High Precision Automatic variable valve control, adjusting, measure the pressure reduction P of tested epi-position 10 rear and front ends by pressure unit 9 and pressure unit 11 dynamic synchronization, the i.e. crushing of this tested throttling element, the standard crushing P under this flow point with this numerical value and tested throttling element Mark(drawing according to the crushing in this tested throttling element throttling parameter list and the corresponding relation of flow) compares, by CPU according to formula ε=(P-P Mark)/P Mark* 100% calculates relative error, and it is qualified to judge whether, testing result forms report automatically by CPU.
2. set pressure loses measurement of discharge.When waterflow stabilization flows, according to the tested throttling element value of pressure loss P that presets in advance, by 13 controls of High Precision Automatic variable valve, regulate, measure the instantaneous delivery Q of tested epi-position 10, the normal flow Q under this crushing point by electromagnetic flowmeter 15 dynamic synchronization with this numerical value and tested throttling element Mark(drawing according to the crushing in this tested throttling element throttling parameter list and the corresponding relation of flow) compares, by CPU according to formula ε=(Q-Q Mark)/Q Mark* 100% calculates relative error, and it is qualified to judge whether, testing result forms report automatically by CPU.
When demarcating or during verification, mode switch valve A opens the electromagnetic flowmeter 15 on the device, mode switch valve B closes, and draining valve 20 cuts out, by the volumetric calibration electromagnetic flowmeter.Its advantage is to avoid the dismounting of electromagnetic flowmeter, can demarcate or verification it at any time.Also available this method is directly demarcated detection to tested throttling element.
The effect of electronic scale treasure is more accurately electromagnetic flowmeter 15 and standard measuring device 19 to be demarcated or verification.Demarcate easylier at the scene because mass method is compared to additive method, and accuracy is higher, therefore makes tracing to the source of package unit convenient, accurate.The direct tested throttling element of also available this method is demarcated detection.
Also be provided with built-in tool case 25 in this test unit.
Useful is that tested throttling element epi-position of the present utility model is not only applicable to detect throttling element, but also very Be applicable to and detect the discharge utensil, such as water meter, flowmeter etc. makes the more diversification of function of its detection, standard Exactness is higher, better reliability.

Claims (5)

1, a kind of fluid flow test unit, the pilot passageway of described test unit is the seal channel that an intersegmental part has liquid flow, on described pilot passageway, be provided with in order and comprise voltage stabilizing fluid supply (4), temperature transmitter (5), electromagnetic switch valve (6), pressure unit (7), binding clasp (8), pressure unit (9), tested epi-position (10), pressure unit (11), pressure unit (12), High Precision Automatic variable valve (13), electromagnetic flowmeter (15), by being arranged on signals collecting and the control that PLC in the built-in electric control case (24) realizes the fluid flow in the described pilot passageway, realize the exchanges data and the processing of flow signal in the described pilot passageway by being located at CPU in the touch-screen (14), touch-screen (14) video data exchange and the result who handles is characterized in that: also be provided with on the described pilot passageway and comprise mode switch valve A (16), commutator (18), the volumetric method test unit that standard measuring device (19) is formed; And be provided with the mass method test unit that comprises that mode switch valve A (16), commutator (18), standard measuring device (19), electronic scale treasure (21) form.
2, a kind of fluid flow test unit according to claim 1 is characterized in that: be provided with mode switch valve B (17) between described electromagnetic flowmeter (15) and the mode switch valve A (16).
3, a kind of fluid flow test unit according to claim 1 is characterized in that: by being arranged on signals collecting and the control that the interior PLC of built-in electric control case (24) realizes fluid flow in described volumetric method test unit and the mass method test unit.
4, according to claim 1 or 3 described a kind of fluid flow test units, it is characterized in that: by being arranged on exchanges data and the processing that CPU in the touch-screen (14) realizes the fluid flow rate signal gathered in described volumetric method test unit and the mass method test unit, exchange of touch-screen (14) video data and the result who handles.
5, a kind of fluid flow test unit according to claim 1, it is characterized in that: described standard measuring device (19) is two at least.
CNU2009201136751U 2009-02-12 2009-02-12 Liquid flow test device CN201364194Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103487119A (en) * 2013-09-29 2014-01-01 杭州竞达电子有限公司 Full-automatic error correction checking device for electronic water meter and method thereof
CN103697974A (en) * 2014-01-06 2014-04-02 中国原子能科学研究院 Verifying device and verifying method of liquid metal flowmeter
CN103884368A (en) * 2014-01-10 2014-06-25 中国计量科学研究院 Hemodialysis machine detector performance automatic calibration method
CN103884369A (en) * 2014-01-10 2014-06-25 中国计量科学研究院 Hemodialysis machine detector performance automatic calibration system
CN104501916A (en) * 2014-12-08 2015-04-08 西尼尔(南京)过程控制有限公司 Liquid calibration system and calibration method thereof
CN105526997A (en) * 2015-12-29 2016-04-27 中国原子能科学研究院 Calibration container, calibration circuit and calibration method of liquid metal flow gauge
CN106353010A (en) * 2016-08-30 2017-01-25 泉州七洋机电有限公司 Comprehensive verification device for calorimeters or water meters
CN107014468A (en) * 2017-03-02 2017-08-04 浙江省计量科学研究院 Compressed gas-driven liquid runoff calibration device and its calibration method
CN107731720A (en) * 2017-11-29 2018-02-23 沈阳拓荆科技有限公司 The fluid flow calibration system and calibration method of a kind of semiconductor processing equipment

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103487119A (en) * 2013-09-29 2014-01-01 杭州竞达电子有限公司 Full-automatic error correction checking device for electronic water meter and method thereof
CN103697974A (en) * 2014-01-06 2014-04-02 中国原子能科学研究院 Verifying device and verifying method of liquid metal flowmeter
CN103884368A (en) * 2014-01-10 2014-06-25 中国计量科学研究院 Hemodialysis machine detector performance automatic calibration method
CN103884369A (en) * 2014-01-10 2014-06-25 中国计量科学研究院 Hemodialysis machine detector performance automatic calibration system
CN103884368B (en) * 2014-01-10 2016-08-17 中国计量科学研究院 Hemodialysis machine detector performance automatic calibrating method
CN104501916A (en) * 2014-12-08 2015-04-08 西尼尔(南京)过程控制有限公司 Liquid calibration system and calibration method thereof
CN105526997A (en) * 2015-12-29 2016-04-27 中国原子能科学研究院 Calibration container, calibration circuit and calibration method of liquid metal flow gauge
CN105526997B (en) * 2015-12-29 2018-10-09 中国原子能科学研究院 A kind of flow of liquid metal gauge calibration container, calibration circuit and scaling method
CN106353010A (en) * 2016-08-30 2017-01-25 泉州七洋机电有限公司 Comprehensive verification device for calorimeters or water meters
CN107014468A (en) * 2017-03-02 2017-08-04 浙江省计量科学研究院 Compressed gas-driven liquid runoff calibration device and its calibration method
CN107014468B (en) * 2017-03-02 2019-08-13 浙江省计量科学研究院 Compressed gas-driven liquid runoff calibration device and its calibration method
CN107731720A (en) * 2017-11-29 2018-02-23 沈阳拓荆科技有限公司 The fluid flow calibration system and calibration method of a kind of semiconductor processing equipment

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091216

Termination date: 20130212

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