CN203964965U - A kind of wide flow measurement device - Google Patents
A kind of wide flow measurement device Download PDFInfo
- Publication number
- CN203964965U CN203964965U CN201420281387.8U CN201420281387U CN203964965U CN 203964965 U CN203964965 U CN 203964965U CN 201420281387 U CN201420281387 U CN 201420281387U CN 203964965 U CN203964965 U CN 203964965U
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- China
- Prior art keywords
- flow
- differential pressure
- pressure transmitter
- signal controller
- transmitter
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Abstract
The utility model relates to a kind of wide flow measurement device, mainly solves same measurement mechanism in prior art and can not carry out to the medium of wide flow the technical matters of Measurement accuracy.The technical solution of the utility model is: a kind of measuring apparatus of wide flow, mainly by flow primary element, high pressure flow differential pressure transmitter, in baric flow amount differential pressure transmitter, low pressure flow differential pressure transmitter, signal controller, flow clearing instrument form, flow primary element is arranged on medium transport pipeline, between flow primary element and the input end of signal controller, with parallel way access high pressure flow differential pressure transmitter, middle baric flow amount differential pressure transmitter and low pressure flow differential pressure transmitter, the output terminal of signal controller is connected with the input end of flow clearing instrument.The utility model is mainly used in the medium metering that flow rate fluctuation is large.
Description
Technical field
The utility model relates to a kind of device of wide flow metering flow, belongs to flow metering equipment technical field.
Background technology
At present, when carrying out the flow metering of a certain medium, all need the concrete flow range according to medium, select the suitable differential pressure transmitter of range ability to carry out flow measurement, after its running parameter is set, whole flow measurement device can be measured the data on flows of a certain medium more exactly, but the scope of Measurement accuracy is narrower; When carrying out the flow metering of wide flow, exceed the output signal of its measurement range or do not reach and require to cause larger Error of flowrate computation as small-signal excision or precision.So, each enterprise is in actual production process, within the different time periods, because use the difference of unlatching quantity of the terminal device of a certain medium, cause the flow rate fluctuation of house steward's medium very large, while using existing flow device to measure, usually exceed its effective measurement range, produce larger measuring error, normal production and operation and the energy, cost management have been affected, cause very large puzzlement to supplier and user, thereby produce larger economic loss, therefore both sides of supply and demand also produce dispute often.So reach the object of accurate measurement in the urgent need to designing a kind of new measuring apparatus, for production and operation, the energy, cost management provide accurate data.
There is the defect that can not accurately detect wide range of traffic or cannot detect low discharge in existing flow measurement device, its main cause is: existing flow measurement device in use, difference because of the unlatching quantity of terminal device, actual flow usually exceeds its effective measurement range, cause larger error in dipping, directly affected final metering result.
Summary of the invention
The purpose of this utility model is to provide a kind of wide flow measurement device, mainly solves same measurement mechanism in prior art and can not carry out to the medium of wide flow the technical matters of Measurement accuracy.
The technical solution adopted in the utility model is:
A kind of wide flow measurement device, mainly by flow primary element, high pressure flow differential pressure transmitter, in baric flow amount differential pressure transmitter, low pressure flow differential pressure transmitter, signal controller, flow clearing instrument form, flow primary element is arranged on medium transport pipeline, between flow primary element and the input end of signal controller, with parallel way access high pressure flow differential pressure transmitter, middle baric flow amount differential pressure transmitter and low pressure flow differential pressure transmitter, the output terminal of signal controller is connected with the input end of flow clearing instrument.
When measuring the medium of wide flow, first according to total flow range of measured medium, the flow primary element of selecting measurement range to match with it, and then according to the effective range of high, medium and low voltage difference in flow pressure transmitter, total flow range is divided into a high flow capacity scope, a middle flow range and a low discharge scope; With high pressure flow differential pressure transmitter, middle baric flow amount differential pressure transmitter and low pressure flow differential pressure transmitter, measure respectively the high flow capacity differential pressure signal of 3 kinds of different range, middle flow differential pressure signal and low discharge differential pressure signal, high pressure flow differential pressure transmitter, middle baric flow amount differential pressure transmitter and low pressure flow differential pressure transmitter output to signal controller by differential pressure signal simultaneously, signal controller compares judgement by the 3 road differential pressure signal values and its preset signals value that receive, thereby determining which signal is useful signal, reaches the object of accurate-metering.
2 output signal values of the middle baric flow transmitter that the upper limit flow that in the utility model, the default signal value of signal controller is middle flow range and lower limit flow are corresponding, in supposing, output signal value corresponding to the upper limit of flow range is designated as the default signal value A of signal controller, and the output signal value corresponding to lower limit of middle flow range is designated as the default signal value B of signal controller.
During the default signal value A of the differential pressure signal value > signal controller of the middle baric flow amount differential pressure transmitter that signal controller receives, signal controller is judged as useful signal value by the output signal value of high pressure flow differential pressure transmitter, and this signal is exported to flow clearing instrument, flow clearing instrument is only according to the flow of the output signal value metering medium of high pressure flow differential pressure transmitter.What now, the utility model was surveyed is the flow of high flow capacity scope.
During the default signal value B of the differential pressure signal value < signal controller of the middle baric flow amount differential pressure transmitter that signal controller receives, signal controller is judged as useful signal value by the output signal value of low pressure flow differential pressure transmitter, and this signal is exported to flow clearing instrument, flow clearing instrument is only according to the flow of the output signal value metering medium of low pressure flow differential pressure transmitter.What now, the utility model was surveyed is the flow of low discharge scope.
During the default signal value A of the differential pressure signal value≤signal controller of the middle baric flow amount differential pressure transmitter that the default signal value B of signal controller≤signal controller receives, signal controller is judged as useful signal value by the output signal value of middle baric flow amount differential pressure transmitter, and this signal is exported to flow clearing instrument, the flow of the output signal value metering medium of baric flow amount differential pressure transmitter in a flow clearing instrument basis.What now, the utility model was surveyed is the flow of middle flow range.
The utility model compared with prior art tool has the following advantages:
1. the utility model is by adopting signal controller, realized when measuring high, medium and low voltage scope flow, do not need to carry out the switching of measurement mechanism, with same measurement mechanism, at same station, get final product the wide flow of Measurement accuracy medium, reduced the shut down time because of handover measurement device, improve production efficiency, reduced production cost.
2. the utility model is easy to operate, its 3 differential pressure transmitters can be measured the rate-of flow of 3 kinds of different range simultaneously, have realized to high flow with compared with the Measurement accuracy of low discharge, have improved the measuring accuracy of flow, avoid the larger fluctuation due to flow, occurred larger measuring error.
3. the utility model measurement range is wide, there are 3 flow measurement range, the output signal of the differential pressure transmitter that 3 corresponding differential pressure range scopes are different is input to same signal controller, signal controller can judge the 3 road signals of accepting, identify effective measuring-signal, then carry out the cumulative clearing of flow.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing is structural representation of the present utility model.
Description of symbols in figure:
1-medium transport pipeline; 2-flow primary element, 3-high pressure flow differential pressure transmitter, baric flow amount differential pressure transmitter in 4-, 5-low pressure flow differential pressure transmitter, 6-signal controller, 7-flow clearing instrument.
Embodiment
A kind of wide flow measurement device, the main standard orifice plate flow primary element 2 that is YYK-630LX by model, model is 3051CD3A high pressure flow differential pressure transmitter 3, model is baric flow amount differential pressure transmitter 4 in 3051CD2A, model is 3051CD1A low pressure flow differential pressure transmitter 5, model is MY4NJ signal controller 6, model is that XLF-51 flow clearing instrument 7 forms, flow primary element 2 is arranged on medium transport pipeline 1, between the input end of flow primary element 2 and signal controller 6, with parallel way, be connected with high pressure flow differential pressure transmitter 3, middle baric flow amount differential pressure transmitter 4 and low pressure flow differential pressure transmitter 5, the output terminal of signal controller 6 is connected with the input end of flow clearing instrument 7, thereby carry out flow clearing.
As, certain steelworks has 3 150 tons of converters, in steelmaking process, 3 block converters are in likely oxygen blast simultaneously of section sometime, also likely only have 1 block converter or 2 block converters in oxygen blast, oxygen flow fluctuation in conveyance conduit is very large, if carry out measurement with current flow measurement device, can produce larger measuring error.While only having 1 block converter oxygen blast, oxygen flow scope is 25000 ~ 35000Nm
3/ h, during the oxygen blast simultaneously of 2 block converters, oxygen flow scope is 50000 ~ 70000Nm
3/ h, during the oxygen blast simultaneously of 3 block converters, oxygen flow scope is 75000 ~ 105000Nm
3/ h.According to concrete flow, pass through to calculate, effective measuring-signal scope of high pressure flow differential pressure transmitter 3 is set as to 12.2 ~ 20mA, effective measuring-signal scope of middle baric flow amount differential pressure transmitter 4 is set as 12.2 ~ 20mA, effective measuring-signal of low pressure flow differential pressure transmitter 5 is set as 12.2 ~ 20mA, and high pressure flow differential pressure transmitter 3, middle baric flow amount differential pressure transmitter 4 and low pressure flow differential pressure transmitter 5 output to signal controller 6 by the differential pressure signal value of institute's oxygen determination airshed.Oxygen flow lower limit 50000Nm during the oxygen blast simultaneously of 2 block converters
3the output signal of the middle baric flow amount differential pressure transmitter 4 that/h is corresponding is 12.2mA, the oxygen flow upper limit 70000Nm during oxygen blast simultaneously of 2 block converters
3the output signal of the middle baric flow amount differential pressure transmitter 4 that/h is corresponding is 20mA.
The output signal of low pressure flow differential pressure transmitter 5 is calculated according to formula one:
Formula one:
In formula: q--instantaneous delivery, Nm
3/ h;
The maximum flow of Qmax--measured medium, Nm
3/ h;
I--output signal numerical value, mA.
During Converter Oxigen Blowing, the maximum flow of oxygen is 35000Nm
3/ h, now the corresponding relation of the instantaneous delivery of oxygen and low voltage difference pressure transmitter output signal is in Table 1.
Table 1: oxygen maximum flow is 35000Nm
3/ h,
Low voltage difference pressure transmitter output signal and instantaneous delivery respective value
| Output signal I(mA) | 4 | 4.6 | 6.9 | 12.2 | 15.8 | 20 |
| Instantaneous delivery q(Nm 3/h） | 0 | 7000 | 15000 | 25000 | 30000 | 35000 |
The output signal of middle baric flow amount differential pressure transmitter 4 is calculated according to formula two:
Formula two:
In formula: q--instantaneous delivery, Nm
3/ h;
The maximum flow of Qmax--measured medium, Nm
3/ h;
I--output signal numerical value, mA.
During Converter Oxigen Blowing, the maximum flow of oxygen is 70000Nm
3/ h, now the corresponding relation of the instantaneous delivery of oxygen and middle pressure/differential pressure transmitter output signal sees the following form 2:
Table 2: oxygen maximum flow is 70000Nm
3/ h,
Middle pressure/differential pressure transmitter output parameter and instantaneous delivery respective value
| Output signal I(mA) | 4 | 4.7 | 6.9 | 12.2 | 15.8 | 20 | 21 | 22 | 25 |
| Instantaneous delivery q(Nm 3/h） | 0 | 15000 | 30000 | 50000 | 60000 | 70000 | 72150 | 74250 | 80200 |
The output signal of high pressure flow differential pressure transmitter 3 is calculated according to formula three:
Formula three:
In formula: q--instantaneous delivery, Nm
3/ h;
The maximum flow of Qmax--measured medium, Nm
3/ h;
I--output signal numerical value, mA.
During Converter Oxigen Blowing, the maximum flow of oxygen is 105000Nm
3/ h, now the corresponding relation of the instantaneous delivery of oxygen and High Pressure Difference pressure transmitter output signal sees the following form 3.
Table 3: oxygen maximum flow is 105000Nm
3/ h,
High Pressure Difference pressure transmitter output parameter and instantaneous delivery respective value
| Output signal I(mA) | 4 | 4.9 | 7.6 | 12.2 | 15.8 | 20 |
| Instantaneous delivery q(Nm 3/h） | 0 | 25000 | 50000 | 75000 | 90000 | 105000 |
Oxygen upper limit flow 70000Nm when the default signal value A of signal controller 6 is the oxygen blast simultaneously of 2 block converters
3the output signal value 20mA of the middle baric flow transmitter 4 that/h is corresponding: limit flow 50000Nm under oxygen when the default signal value B of signal controller 6 is the oxygen blast simultaneously of 2 block converters
3the output signal value 12.2mA of the middle baric flow transmitter 4 that/h is corresponding.
During the differential pressure signal value > 20mA of the middle baric flow amount differential pressure transmitter 4 that signal controller 6 receives, signal controller 6 is judged as useful signal value by the output signal value of high pressure flow differential pressure transmitter 3, and this signal is exported to flow clearing instrument 7, the flow of 7 metering of the output signal value according to high pressure flow differential pressure transmitter 3 oxygen of flow clearing instrument.The flow of now, the utility model is surveyed while being the oxygen blast simultaneously of 3 block converters oxygen.
During the differential pressure signal value < 12.2mA of the middle baric flow amount differential pressure transmitter 4 that signal controller 6 receives, signal controller 6 is judged as useful signal value by the output signal value of low pressure flow differential pressure transmitter 5, and this signal is exported to flow clearing instrument 7, the flow of 7 metering of the output signal value according to low pressure flow differential pressure transmitter 5 oxygen of flow clearing instrument.What now, the utility model was surveyed is the flow of oxygen while only having 1 block converter oxygen blast.
During the differential pressure signal value≤20mA of the middle baric flow amount differential pressure transmitter 4 that 12.2mA≤signal controller 6 receives, signal controller 6 is judged as useful signal value by the output signal value of middle baric flow amount differential pressure transmitter 4, and this signal is exported to flow clearing instrument 7, the flow of the output signal value metering oxygen of baric flow amount differential pressure transmitter 4 in 7 bases of flow clearing instrument.The flow of now, the utility model is surveyed while being the oxygen blast simultaneously of 2 block converters oxygen.
Claims (2)
1. a wide flow measurement device, mainly by flow primary element, high pressure flow differential pressure transmitter, in baric flow amount differential pressure transmitter, low pressure flow differential pressure transmitter and flow clearing instrument form, flow primary element is arranged on medium transport pipeline, it is characterized in that, also comprise signal controller, between flow primary element and the input end of signal controller, with parallel way access high pressure flow differential pressure transmitter, middle baric flow amount differential pressure transmitter and low pressure flow differential pressure transmitter, the output terminal of signal controller is connected with the input end of flow clearing instrument.
2. a kind of wide flow measurement device as claimed in claim 1, is characterized in that, 2 output signal values of the middle baric flow transmitter that the upper limit flow that in described signal controller, default signal value is middle flow range and lower limit flow are corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281387.8U CN203964965U (en) | 2014-05-29 | 2014-05-29 | A kind of wide flow measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281387.8U CN203964965U (en) | 2014-05-29 | 2014-05-29 | A kind of wide flow measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203964965U true CN203964965U (en) | 2014-11-26 |
Family
ID=51925533
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|---|---|---|---|
| CN201420281387.8U Expired - Fee Related CN203964965U (en) | 2014-05-29 | 2014-05-29 | A kind of wide flow measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111971127A (en) * | 2018-04-11 | 2020-11-20 | 株式会社岛津制作所 | Field flow separation device |
| CN112378464A (en) * | 2020-09-28 | 2021-02-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Small flow meter measuring device combined with uniform-velocity tube flow meter and method thereof |
-
2014
- 2014-05-29 CN CN201420281387.8U patent/CN203964965U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111971127A (en) * | 2018-04-11 | 2020-11-20 | 株式会社岛津制作所 | Field flow separation device |
| CN111971127B (en) * | 2018-04-11 | 2022-06-24 | 株式会社岛津制作所 | Field flow separation device |
| CN112378464A (en) * | 2020-09-28 | 2021-02-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Small flow meter measuring device combined with uniform-velocity tube flow meter and method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 |