CN102589658B - Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method - Google Patents
Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method Download PDFInfo
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- CN102589658B CN102589658B CN201210049541.4A CN201210049541A CN102589658B CN 102589658 B CN102589658 B CN 102589658B CN 201210049541 A CN201210049541 A CN 201210049541A CN 102589658 B CN102589658 B CN 102589658B
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Abstract
The invention discloses a starting-stopping heavy-caliber water flow calibrating device and a starting-stopping heavy-caliber water flow calibrating method. The calibrating device comprises a main pipeline for water to flow, wherein a meter to be calibrated, a switch valve and an instant flow meter are arranged on the main pipeline, and a water inlet end of the main pipeline is provided with a three-way change valve which is further connected with a bypass pipeline. The calibrating method includes steps of: 1) starting the three-way valve and closing a pneumatic ball valve in linkage control mode, leading water to flow into the main pipeline and leading water to flow to the bypass pipeline; 2) closing the three-way valve and starting the pneumatic ball valve in linkage control mode, and leading water to be filled in a weighing machine through the meter to be calibrated and the instant flow meter; 3) starting the three-way valve and closing the pneumatic ball valve again when the meter to be calibrated points to a preset reading; and 4) obtaining calibrating results by comparing standard values with calibrated values. The starting-stopping heavy-caliber water flow calibrating device and the starting-stopping heavy-caliber water flow calibrating method can achieve detection of a heavy-caliber flow meter in a starting-stopping method, and cause no water hammer effect in the detection process.
Description
Technical field
The present invention relates to a kind of start and stop method heavy caliber water flow standard apparatus and detection method.
Background technology
In flow metering, many flow instruments are exported without electric signal, as pointer flow instrument, print wheel flow instrument etc.The built-in step-by-step counting of a lot of employing in this class flow instrument, interval (8～10) second, sampling should be carried out, is so just difficult for using the detection of static weighing (or volume) method.
At present, such flowmeter adopts traditional start and stop method to solve for small-bore (DN50mm is following) conventionally, owing to adopting heavy caliber to adopt start and stop method very easily to produce " water hammer " effect, (" water hammer effect " refers to that inside pipe wall is smooth in water pipe inside, and water flow freely.When the valve of opening is closed suddenly, current, to valve and tube wall, are mainly that valve can produce a pressure.Because tube wall is smooth, follow-up current, under the effect of inertia, reach rapidly maximum, and produce destruction.On the contrary, the valve of closing, after throwing open, also can produce water hammer), thus damage device.Therefore for heavy caliber adopt international standards regulation commutator calibration method.But commutator calibration method is for the flow instrument of DN80mm and above bore or inapplicable.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of start and stop method heavy caliber discharge pick-up unit is provided, can adopt start and stop method to detect bigbore flow instrument with this device.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals: a kind of start and stop method heavy caliber water flow standard apparatus, it is characterized in that, comprise the main line for water flow, on described main line, be provided with switch valve, instantaneous flowmeter, tested table is installed on described main line, and the water inlet end of described main line is provided with three-way diverter valve, and described three-way diverter valve is also connected with bypass duct.
In technique scheme, the water inlet end of described three-way diverter valve is provided with frequency-conversion steady-flow potential source, and described frequency-conversion steady-flow potential source comprises that one for holding the pond of water, and a water pump for drawing water, and the water side of described bypass duct is positioned at pond.
In technique scheme, described three-way diverter valve is Pneumatic three-way ball valve.
In technique scheme, described three-way diverter valve is pneumatic tubular type commutator.
In technique scheme, described instantaneous delivery is counted electromagnetic flowmeter.
In technique scheme, on described main line, be also provided with flow control valve.
In technique scheme, on described main line, be also provided with weigher.
Another object of the present invention is to provide a kind of detection method: comprise the steps: 1) interlock control unlatching three-way diverter valve and closing switch valve, make main line pass into water, and make water flow to bypass duct; 2) interlock is controlled and is closed three-way diverter valve and opening switch valve, and water injects weigher through tested table and instantaneous flowmeter; 3) when tested table is to predetermined reading, again start three-way diverter valve and closing switch valve; 4) tested table and instantaneous flowmeter are made comparisons, and draw verification result.
Beneficial effect: the present invention compared with prior art, has following beneficial effect: the present invention can realize bigbore flow instrument and adopt the detection of start and stop method, and can not produce again " water hammer " effect in testing process.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail: referring to Fig. 1, a kind of start and stop method heavy caliber water flow standard apparatus, comprise frequency-conversion steady-flow potential source 1, described frequency-conversion steady-flow potential source 1 comprises that one for holding the pond 10 of water, and a water pump 12 for drawing water.This device adopts frequency-conversion steady-flow method to make the potential source of device far below traditional 4MPa, and the pressure loss while being only equivalent to device pipeline assembly corresponding discharge, reaches damage device " water hammer " even if start and stop valve can not produce yet.
Described water pump 12 connects a three-way diverter valve 2 by a pipeline.This three-way diverter valve 2 can be Pneumatic three-way ball valve, also can adopt pneumatic tubular type commutator.Pneumatic three-way ball valve, pneumatic tubular type commutator start and stop actuation time (start to standard-sized sheet or start to complete shut-down) are not shorter than 1 second, meet international standard regulation.
Described three-way diverter valve 2 one of them water side connect the main line 100 of some segment pipe compositions, are disposed with tested table 3, switch valve 4, instantaneous flowmeter 5, flow control valve 6 and weigher 7 on described main line 100.Described switch valve 4, flow control valve 6 all adopt pneumatic ball valve, and when its standard-sized sheet, resistance is less, and adjusting function is also good.Described instantaneous flowmeter 5 is a standard scale, is the table of an assay approval, tested table 3 with its relatively, if reading is consistent or be judged to be qualifiedly within error range, if tested table 3 is inconsistent with it and exceed error range, be judged to be defective.Described instantaneous flowmeter 5 is electromagnetic flowmeter, and flow range is wide, performance good, without crushing.
Described three-way diverter valve 2 another water side connect bypass duct 200, the water side of described bypass duct 200 is positioned at pond 10.
When detection, adopt following steps to detect: 1) interlock is controlled and opened three-way diverter valve 2 and closing switch valve 4, opens water pump 12, makes main line 100 pass into water, and makes water flow to bypass duct 200, and finally flow back to pond 10; Interlock control described in this step refers to synchro control, closing switch valve 4 when opening three-way diverter valve 2.
2) interlock is controlled and is closed three-way diverter valve 2 and opening switch valve 4, and water injects weigher through tested table and instantaneous flowmeter 5; In like manner, the interlock control described in this step refers to synchro control, opening switch valve 4 when closing three-way diverter valve 2.
3) tested table 3, to predetermined reading, starts three-way diverter valve 2 and closing switch valve 4 again.
4) tested table 3 is made comparisons with instantaneous flowmeter 5, draws verification result.
The present invention, owing to being provided with three-way diverter valve 2 and main line 100 and bypass duct 200, while therefore adopting start and stop method to detect, has current always in water pipe, effectively avoided water hammer effect.Thereby can be with making large-diameter water meter also can use start and stop method to detect.
Claims (6)
1. a start and stop method heavy caliber water flow standard apparatus, it is characterized in that, comprise the main line (100) for water flow, on described main line (100), be provided with switch valve (4), instantaneous flowmeter (5), tested table (3) is installed on described main line (100), the water inlet end of described main line (100) is provided with three-way diverter valve (2), described three-way diverter valve (2) is also connected with bypass duct (200), the water inlet end of described three-way diverter valve (2) is provided with frequency-conversion steady-flow potential source (1), described frequency-conversion steady-flow potential source (1) comprises that one for holding the pond (10) of water, water pump (12) with one for drawing water, the water side of described bypass duct (200) is positioned at pond (10), when detection, comprise the steps: 1) interlock control unlatching three-way diverter valve (2) and closing switch valve (4), make main line (100) pass into water, and make water flow to bypass duct (200), 2) interlock is controlled and is closed bypass duct (200) and the opening switch valve (4) that three-way diverter valve (2) connects, and water injects weigher (7) through tested table (3) and instantaneous flowmeter (5), 3) when tested table (3) is to predetermined reading, again start three-way diverter valve (2) and closing switch valve (4), 4) tested table (3) is made comparisons with instantaneous flowmeter (5), draws verification result.
2. start and stop method heavy caliber water flow standard apparatus as claimed in claim 1, is characterized in that, described three-way diverter valve (2) is Pneumatic three-way ball valve.
3.
start and stop method heavy caliber water flow standard apparatus as claimed in claim 1 or 2, is characterized in that, described three-way diverter valve (2) is pneumatic tubular type commutator.
4.
start and stop method heavy caliber water flow standard apparatus as claimed in claim 1 or 2, is characterized in that, described instantaneous flowmeter (5) is electromagnetic flowmeter.
5.
start and stop method heavy caliber water flow standard apparatus as claimed in claim 1 or 2, is characterized in that, is also provided with flow control valve (6) on described main line (100).
6.
start and stop method heavy caliber water flow standard apparatus as claimed in claim 1 or 2, is characterized in that, is also provided with weigher (7) on described main line (100).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210049541.4A CN102589658B (en) | 2012-02-29 | 2012-02-29 | Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210049541.4A CN102589658B (en) | 2012-02-29 | 2012-02-29 | Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method |
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| CN102589658A CN102589658A (en) | 2012-07-18 |
| CN102589658B true CN102589658B (en) | 2014-06-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105115574A (en) * | 2015-07-20 | 2015-12-02 | 江西省水利水电建设有限公司 | On-site test method of judging accuracy of recorded information of grouting automatic recorder |
| CN105823533A (en) * | 2016-06-17 | 2016-08-03 | 宁波明泰流量设备有限公司 | Double-clock detecting method for flowmeter |
| CN110095170A (en) * | 2019-05-16 | 2019-08-06 | 上海市供水水表强制检定站有限公司 | A kind of compulsory verification method of water supply water meter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201170745Y (en) * | 2008-03-24 | 2008-12-24 | 大港油田集团有限责任公司 | Apparatus for calibrating water meter |
| CN101556181A (en) * | 2009-05-20 | 2009-10-14 | 西安东风机电有限公司 | Composite static start-stop method mass flowmeter calibration system |
| CN201811771U (en) * | 2010-09-01 | 2011-04-27 | 淮阴工学院 | Calibration device for flow sensor of loader hydraulic system |
| CN202485763U (en) * | 2012-02-29 | 2012-10-10 | 宁波明泰流量设备有限公司 | Heavy-calibre water flow standard device with start-stop method for detection |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201170745Y (en) * | 2008-03-24 | 2008-12-24 | 大港油田集团有限责任公司 | Apparatus for calibrating water meter |
| CN101556181A (en) * | 2009-05-20 | 2009-10-14 | 西安东风机电有限公司 | Composite static start-stop method mass flowmeter calibration system |
| CN201811771U (en) * | 2010-09-01 | 2011-04-27 | 淮阴工学院 | Calibration device for flow sensor of loader hydraulic system |
| CN202485763U (en) * | 2012-02-29 | 2012-10-10 | 宁波明泰流量设备有限公司 | Heavy-calibre water flow standard device with start-stop method for detection |
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Inventor after: Zhu Hongliang Inventor after: Zhang Zuming Inventor after: Dai Jilie Inventor after: Xu Defen Inventor after: Zhang Hongfeng Inventor before: Zhu Hongliang Inventor before: Zhang Zuming Inventor before: Dai Jilie Inventor before: Xu Defen Inventor before: Lin Yiping |
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Free format text: CORRECT: INVENTOR; FROM: ZHU HONGLIANG ZHANG ZUMING DAI JILIE XU DEFEN LIN YIPING TO: ZHU HONGLIANG ZHANG ZUMING DAI JILIE XU DEFEN ZHANG HONGFENG |
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