CN202485763U - Heavy-calibre water flow standard device with start-stop method for detection - Google Patents
Heavy-calibre water flow standard device with start-stop method for detection Download PDFInfo
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- CN202485763U CN202485763U CN201220071005XU CN201220071005U CN202485763U CN 202485763 U CN202485763 U CN 202485763U CN 201220071005X U CN201220071005X U CN 201220071005XU CN 201220071005 U CN201220071005 U CN 201220071005U CN 202485763 U CN202485763 U CN 202485763U
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Abstract
The utility model discloses a heavy-calibre water flow standard device with a start-stop method for detection. The heavy-calibre water flow standard device is characterized by comprising a main pipeline for water flow, wherein a switch valve and an instantaneous flowmeter are arranged on the main pipeline, an inspected meter is arranged on the main pipeline, and a three-way change-over valve is arranged at the water inlet end of the main pipeline and further connected with a bypass pipeline. The standard device can realize detection on heavy-calibre flowmeters by adopting the start-stop method, and can not generate a water hammer effect in detection process.
Description
Technical field
The utility model relates to a kind of start and stop method heavy caliber water flow standard apparatus.
Background technology
In flow metering, many flow instruments do not have electric signal output, like pointer flow instrument, character wheel formula flow instrument or the like.The built-in step-by-step counting of a lot of employings in this type flow instrument, (8～10) second once sampling so just is difficult for using the detection of static weighing (or volume) method at interval.
At present; Such flowmeter adopts traditional start and stop method to solve for small-bore (below the DN50mm) usually; Because (" water hammer effect " is meant at water pipe inner, and inside pipe wall is smooth, and water flows freely to adopt heavy caliber to adopt the start and stop method very easily to produce " water hammer " effect.When the valve of opening is closed suddenly, current mainly are that valve can produce a pressure to valve and tube wall.Because tube wall is smooth, follow-up current reach maximum rapidly under action of inertia, and produce destruction.On the contrary, the valve of closing also can produce water hammer after throwing open), thus device damaged.The commutator calibration method of therefore adopting international standards to stipulate for heavy caliber.But the commutator calibration method still is inapplicable for the flow instrument of DN80mm and above bore.
Summary of the invention
The utility model provides a kind of start and stop method heavy caliber discharge pick-up unit to deficiency of the prior art, uses this device can adopt the start and stop method to detect bigbore flow instrument.
In order to solve the problems of the technologies described above; The utility model is able to solve through following technical proposals: a kind of start and stop method heavy caliber water flow standard apparatus, it is characterized in that, and comprise the main line that is used for water flows; Said main line is provided with switch valve, instantaneous flowmeter; Seized table is installed on the said main line, and the water inlet end of said main line is provided with three-way diverter valve, and said three-way diverter valve also is connected with bypass duct.
In the technique scheme, the water inlet end of said three-way diverter valve is provided with the frequency-conversion steady-flow potential source, said frequency-conversion steady-flow potential source comprise one be used to hold water pond and the water pump that is used to draw water, the water side of said bypass duct is positioned at the pond.
In the technique scheme, said three-way diverter valve is the Pneumatic three-way ball valve.
In the technique scheme, said three-way diverter valve is pneumatic tubular type commutator.
In the technique scheme, said instantaneous delivery is counted electromagnetic flowmeter.
In the technique scheme, also be provided with flow control valve on the said main line.
In the technique scheme, also be provided with weigher on the said main line.
Beneficial effect: the utility model compared with prior art has following beneficial effect: the utility model can realize that bigbore flow instrument adopts the detection of start and stop method, and can not produce " water hammer " effect in the testing process again.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model 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, said frequency-conversion steady-flow potential source 1 comprise one be used to hold water the pond 10 and water pump 12 that is used to draw water.The potential source that this device employing frequency-conversion steady-flow method makes device is far below traditional 4MPa, and the pressure loss when only being equivalent to device pipeline assembly corresponding discharge is damaged device " water hammer " even if the start and stop valve also can not produce to reach.
Said water pump 12 connects a three-way diverter valve 2 through a pipeline.This three-way diverter valve 2 can be the 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 (promptly start to standard-sized sheet or start to complete shut-down) are not shorter than 1 second, meet the international standard regulation.
Said three-way diverter valve 2 one of them water side connect the main line 100 that the plurality of sections pipeline is formed, and are disposed with seized table 3, switch valve 4, instantaneous flowmeter 5, flow control valve 6 and weigher 7 on the said main line 100.Said switch valve 4, flow control valve 6 all adopt pneumatic ball valve, and resistance is less during its standard-sized sheet, and adjusting function is also good.Described instantaneous flowmeter 5 is a standard scale, is the table of an assay approval, seized table 3 with its relatively, if reading consistent or within error range, promptly be judged to be qualified, if seized table 3 is inconsistent with it and exceed error range then be judged to be defective.Described instantaneous flowmeter 5 is an electromagnetic flowmeter, and flow range is wide, performance good, no crushing.
Said three-way diverter valve 2 another water side connect bypass duct 200, the water side of said bypass duct 200 is positioned at pond 10.
During detection, adopt following steps to detect: 1) three-way diverter valve 2 and off switch valve 4 are opened in interlock control, open water pump 12, make main line 100 feed water, and make water flow to bypass duct 200, and finally flow back to pond 10; Interlock described in this step control is meant synchro control, off switch valve 4 when promptly opening three-way diverter valve 2.
2) interlock control is closed three-way diverter valve 2 and is opened switch valve 4, and water injects weigher through seized table and instantaneous flowmeter 5; In like manner, interlock described in this step control is meant synchro control, opens switch valve 4 when promptly closing three-way diverter valve 2.
3) seized table 3 starts three-way diverter valve 2 and off switch valve 4 once more to predetermined reading.
4) seized table 3 is made comparisons with instantaneous flowmeter 5, draws verification result.
The utility model when therefore adopting the start and stop method to detect, has current owing to be provided with three-way diverter valve 2 and main line 100 and bypass duct 200 always in the water pipe, avoided water hammer effect effectively.Thereby can be with making large-diameter water meter also can use the start and stop method to detect.
Claims (7)
1. start and stop method heavy caliber water flow standard apparatus; It is characterized in that; Comprise the main line (100) that is used for water flows, said main line (100) is provided with switch valve (4), instantaneous flowmeter (5), and seized table (3) is installed on the said main line (100); The water inlet end of said main line (100) is provided with three-way diverter valve (2), and said three-way diverter valve (2) also is connected with bypass duct (200).
2. start and stop method heavy caliber water flow standard apparatus as claimed in claim 1; It is characterized in that; The water inlet end of said three-way diverter valve (2) is provided with frequency-conversion steady-flow potential source (1); Said frequency-conversion steady-flow potential source (1) comprise one be used to hold water pond (10) and the water pump (12) that is used to draw water, the water side of said bypass duct (200) is positioned at pond (10).
3. according to claim 1 or claim 2 start and stop method heavy caliber water flow standard apparatus is characterized in that said three-way diverter valve (2) is the Pneumatic three-way ball valve.
4. according to claim 1 or claim 2 start and stop method heavy caliber water flow standard apparatus is characterized in that said three-way diverter valve (2) is pneumatic tubular type commutator.
5. according to claim 1 or claim 2 start and stop method heavy caliber water flow standard apparatus is characterized in that said instantaneous flowmeter (5) is an electromagnetic flowmeter.
6. according to claim 1 or claim 2 start and stop method heavy caliber water flow standard apparatus is characterized in that, also is provided with flow control valve (6) on the said main line (100).
7. according to claim 1 or claim 2 start and stop method heavy caliber water flow standard apparatus is characterized in that, also is provided with weigher (7) on the said main line (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220071005XU CN202485763U (en) | 2012-02-29 | 2012-02-29 | Heavy-calibre water flow standard device with start-stop method for detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220071005XU CN202485763U (en) | 2012-02-29 | 2012-02-29 | Heavy-calibre water flow standard device with start-stop method for detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202485763U true CN202485763U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220071005XU Expired - Fee Related CN202485763U (en) | 2012-02-29 | 2012-02-29 | Heavy-calibre water flow standard device with start-stop method for detection |
Country Status (1)
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| CN (1) | CN202485763U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589658A (en) * | 2012-02-29 | 2012-07-18 | 宁波明泰流量设备有限公司 | Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method |
| CN103743455A (en) * | 2013-12-31 | 2014-04-23 | 广西玉柴机器股份有限公司 | Mass flowmeter detecting device and detecting method |
-
2012
- 2012-02-29 CN CN201220071005XU patent/CN202485763U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589658A (en) * | 2012-02-29 | 2012-07-18 | 宁波明泰流量设备有限公司 | Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method |
| CN102589658B (en) * | 2012-02-29 | 2014-06-25 | 宁波明泰流量设备有限公司 | Starting-stopping heavy-caliber water flow calibrating device and starting-stopping heavy-caliber water flow calibrating method |
| CN103743455A (en) * | 2013-12-31 | 2014-04-23 | 广西玉柴机器股份有限公司 | Mass flowmeter detecting device and detecting method |
| CN103743455B (en) * | 2013-12-31 | 2016-06-29 | 广西玉柴机器股份有限公司 | Calibrating apparatus of quality flowmeter and calibration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20180229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |