CN104215305A - Full-automatic supersonic nozzle high flow standard device - Google Patents
Full-automatic supersonic nozzle high flow standard device Download PDFInfo
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- CN104215305A CN104215305A CN201310217887.5A CN201310217887A CN104215305A CN 104215305 A CN104215305 A CN 104215305A CN 201310217887 A CN201310217887 A CN 201310217887A CN 104215305 A CN104215305 A CN 104215305A
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Abstract
The invention relates to a full-automatic sonic nozzle high flow standard device, and belongs to the technical field of flow instrument calibration standard devices. The full-automatic sonic nozzle standard device comprises a vacuum pump set 1, an air storage tank 2, a sonic nozzle assembly 3, a flow regulating valve 4, a standard turbine flowmeter 5, a straight pipe section set 6, a meter clamp 7, a working section differential pressure transmitter 8, a temperature transmitter 9, a software and computer 10 and a muffler 11. The sonic nozzle assembly 3 comprises a nozzle 3-1, a valve 3-2, a temperature sensor 3-3, a pressure sensor 3-4 and a precision pressure gauge 3-5. The full-automatic supersonic nozzle high flow standard device has the advantages that the high flow standard condition volume flow rate, the working condition volume flow rate and the mass flow rate can be calibrated, full-automatic control operation is realized, and the accuracy grade is high.
Description
Technical field
The present invention relates to a kind of full-automatic sonic nozzle large discharge standard set-up, belong to the technical field of flow instrument verification standard set-up.
Background technology
Domestic market large discharge sonic nozzle standard set-up can only measure 2700m because of maximum
3/ h flow is little, operation is inconvenient, precision is low, can not adapt to the requirement of oil, the development of chemical industry large discharge instrument product.Therefore the sonic nozzle standard set-up of large discharge is needed, with the needs of satisfied production and user.
Summary of the invention
Object of the present invention is exactly the deficiency for overcoming above technology, provides that a kind of flow is large, operation Automatic Control, large discharge sonic nozzle standard set-up that accuracy class is high.The present invention is by realizing by the following technical solutions: the present invention relates to a kind of full-automatic sonic nozzle large discharge standard set-up, particularly relate to a kind of 3500m
3/ h large discharge sonic nozzle standard set-up, full-automatic sonic nozzle standard set-up comprises vacuum pump group 1, gas-holder 2, sonic nozzle assembly 3, flow control valve 4, standard turbine meter 5, straight length group 6, meter-clamping apparatus 7, active section differential pressure transmitter 8, temperature transmitter 9, software and computing machine 10, exhaust box 11, it is characterized in that full-automatic sonic nozzle standard set-up adopts sonic nozzle method and method of standard table to combine, namely standard scale is adopted to verify the flowmeter that dispatches from the factory under normal conditions, regular sonic nozzle verifies standard scale again, to ensure the accuracy of standard scale and correctly tracing to the source of standard, at large discharge, low discharge, directly verify with sonic nozzle during high precision
,it is characterized in that full-automatic sonic nozzle standard set-up is except precision and measurement range can meet the demands, condition volumetric flow rate, operating mode volumetric flow rate and mass rate can be demarcated, calibrated meter bore is within the scope of DN20 ~ DN300, and calibrated meter flow is at 1.2 ~ 6500m
3within the scope of/h, the verification medium of employing is air, and check system precision is 0.25 or 0.5 grade, and checking procedure is for the vacuum pump group 1 described in full-automatic level is for providing verification medium agent jet air.Described gas-holder 2 is for cushioning, taking up verification medium agent jet air.Described sonic nozzle assembly 3 comprises 8 nozzle 3-1,8 valve 3-2,1 temperature sensor 3-3,1 pressure transducer 3-4,1 precision pressure gauge 3-5, for verifying the verification medium of different flow.Described straight length group 6 by DN15mm ~ DN300mm totally 12 bores, for connecting vacuum pump group 1, gas-holder 2 and sonic nozzle assembly 3.Described active section differential pressure transmitter 8, temperature transmitter 9 are arranged on gas-holder 2, are respectively used to temperature, pressure in gas-holder before and after measuring.Described software and computing machine 10 are regularly derived for the action operation and nominal data controlling package unit, make sonic nozzle namely can be used as Transfer Standards verification standard scale, also directly can verify the flowmeter that dispatches from the factory; Also compensate for method of standard table the deficiency that sonic nozzle can not verify continuously simultaneously, can measuring speed be improved again.Described exhaust box 11 is arranged on vacuum pump group 1 exit, for eliminating the noise that jet brings.
beneficial effect of the present invention:
1, this device is except precision and measurement range can meet the demands, and can demarcate condition volumetric flow rate, operating mode volumetric flow rate and mass rate, can adapt to multi-functional, the diversified needs of enterprise product;
2, this device adopts sonic nozzle method and method of standard table to combine: namely namely sonic nozzle can be used as Transfer Standards verification standard scale, also directly can verify the flowmeter that dispatches from the factory; Also compensate for method of standard table the deficiency that sonic nozzle can not verify continuously simultaneously, can measuring speed be improved again;
3, directly verifying with sonic nozzle the instrument full accuracy that dispatches from the factory is 1 grade, can meet the needs of Trade Measures completely;
4, in the design nargin is left to the installation of sonic nozzle and verifying work platform, so that when range and bore expansion, can improve; As long as and the strict precision controlling sonic nozzle and temperature/pressure sensor, can also continue to improve system accuracy, for future use.
description of drawings 1 is a kind of system construction drawing of full-automatic sonic nozzle large discharge standard set-up
1-vacuum pump group 2-gas-holder
3-sonic nozzle assembly: 3-1 nozzle 3-2 valve 3-3 temperature sensor 3-4 pressure transducer 3-5 precision pressure gauge
4-flow control valve 5-standard turbine meter 6-straight length group 7-meter-clamping apparatus 8-active section differential pressure transmitter 9-temperature transmitter 10-software and computing machine 11-exhaust box.
Embodiment
the full-automatic sonic nozzle large discharge standard set-up composition of embodiment 1 one kinds and effect:
Full-automatic sonic nozzle standard set-up comprises vacuum pump group 1, gas-holder 2, sonic nozzle assembly 3, flow control valve 4, standard turbine meter 5, straight length group 6, meter-clamping apparatus 7, active section differential pressure transmitter 8, temperature transmitter 9, software and computing machine 10, exhaust box 11, and vacuum pump group 1 is for providing verification medium agent jet air.Gas-holder 2 is for cushioning, taking up verification medium agent jet air.Sonic nozzle assembly 3 comprises 8 nozzle 3-1,8 valve 3-2,1 temperature sensor 3-3,1 pressure transducer 3-4,1 precision pressure gauge 3-5, for verifying the verification medium of different flow.Straight length group 6 by DN15mm ~ DN300mm totally 12 bores, for connecting vacuum pump group 1, gas-holder 2 and sonic nozzle assembly 3.Active section differential pressure transmitter 8, temperature transmitter 9 are arranged on gas-holder 2, are respectively used to temperature, pressure in gas-holder before and after measuring.Software and computing machine 10 are regularly derived for the action operation and nominal data controlling package unit, make sonic nozzle namely can be used as Transfer Standards verification standard scale, also directly can verify the flowmeter that dispatches from the factory; Also compensate for method of standard table the deficiency that sonic nozzle can not verify continuously simultaneously, can measuring speed be improved again.Exhaust box 11 is arranged on vacuum pump group 1 exit, for eliminating the noise that jet brings.
the embodiment 2 one kinds full-automatic sonic nozzle large discharge standard set-up course of work:
When device is started working, open vacuum pump group 1, operator inputs the tested surface low value that will measure in host computer simultaneously, and now software and computing machine 10 open corresponding nozzle assembly 3 switch valve automatically according to input measurement value.Then upstream straight length group 6 entrance of air by tested table sucks by vacuum pump group 1, flows through test pipeline section and tested flowmeter, after flowing through the critical flow venturi nozzle 3-1 of certain combination, enters gas-holder 2 and cushions.When gas device enters after steady state (SS) and before and after nozzle, pressure reaches critical pressure ratio, software and computing machine 10 start image data and are recorded in CPU.At the end of test, calculate the integrated flux of standard, and compare with the indicated value of the tested flowmeter collected and calculate, the measuring accuracy of tested flowmeter can be obtained.
Claims (8)
1. the present invention relates to a kind of full-automatic sonic nozzle large discharge standard set-up, particularly relate to a kind of 3500m
3/ h large discharge sonic nozzle standard set-up, full-automatic sonic nozzle standard set-up comprises vacuum pump group 1, gas-holder 2, sonic nozzle assembly 3, flow control valve 4, standard turbine meter 5, straight length group 6, meter-clamping apparatus 7, active section differential pressure transmitter 8, temperature transmitter 9, software and computing machine 10, exhaust box 11, it is characterized in that full-automatic sonic nozzle standard set-up adopts sonic nozzle method and method of standard table to combine, namely standard scale is adopted to verify the flowmeter that dispatches from the factory under normal conditions, regular sonic nozzle verifies standard scale again, to ensure the accuracy of standard scale and correctly tracing to the source of standard, at large discharge, low discharge, directly verify with sonic nozzle during high precision
,it is characterized in that full-automatic sonic nozzle standard set-up is except precision and measurement range can meet the demands, condition volumetric flow rate, operating mode volumetric flow rate and mass rate can be demarcated, calibrated meter bore is within the scope of DN20 ~ DN300, and calibrated meter flow is at 1.2 ~ 6500m
3within the scope of/h, the verification medium of employing is air, and check system precision is 0.25 or 0.5 grade, and checking procedure is full-automatic level.
2. one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, is characterized in that described vacuum pump group 1 is for providing verification medium agent jet air.
3. one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, is characterized in that described gas-holder 2 is for cushioning, taking up verification medium agent jet air.
4. one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, it is characterized in that described sonic nozzle assembly 3 comprises 8 nozzle 3-1,8 valve 3-2,1 temperature sensor 3-3,1 pressure transducer 3-4,1 precision pressure gauge 3-5, for verifying the verification medium of different flow.
5. one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, is characterized in that described straight length group 6 is by DN15mm ~ DN300mm totally 12 bores, for connecting vacuum pump group 1, gas-holder 2 and sonic nozzle assembly 3.
6. one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, is characterized in that described active section differential pressure transmitter 8, temperature transmitter 9 is arranged on gas-holder 2, is respectively used to temperature, pressure in gas-holder before and after measuring.
7. one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, it is characterized in that described software and computing machine 10 are regularly derived for the action operation and nominal data controlling package unit, make sonic nozzle namely can be used as Transfer Standards verification standard scale, also directly can verify the flowmeter that dispatches from the factory; Also compensate for method of standard table the deficiency that sonic nozzle can not verify continuously simultaneously, can measuring speed be improved again.
8. according to one according to claim 1 full-automatic sonic nozzle large discharge standard set-up, it is characterized in that described exhaust box 11 is arranged on vacuum pump group 1 exit, for eliminating the noise that jet brings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310217887.5A CN104215305A (en) | 2013-06-04 | 2013-06-04 | Full-automatic supersonic nozzle high flow standard device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310217887.5A CN104215305A (en) | 2013-06-04 | 2013-06-04 | Full-automatic supersonic nozzle high flow standard device |
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| CN104215305A true CN104215305A (en) | 2014-12-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104535142A (en) * | 2015-01-04 | 2015-04-22 | 镇江市计量检定测试中心 | Nozzle block type gas flowmeter calibrating device |
| CN107677342A (en) * | 2016-08-01 | 2018-02-09 | 中国石油化工股份有限公司 | Natural gas flowmeter verification system |
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| US20020157448A1 (en) * | 2000-09-05 | 2002-10-31 | Katahisa Hirai | Flowmeter calibration apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535142A (en) * | 2015-01-04 | 2015-04-22 | 镇江市计量检定测试中心 | Nozzle block type gas flowmeter calibrating device |
| CN107677342A (en) * | 2016-08-01 | 2018-02-09 | 中国石油化工股份有限公司 | Natural gas flowmeter verification system |
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Application publication date: 20141217 |
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