CN202974349U - Device capable of measuring flows of mediums of different densities - Google Patents
Device capable of measuring flows of mediums of different densities Download PDFInfo
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- CN202974349U CN202974349U CN 201220297341 CN201220297341U CN202974349U CN 202974349 U CN202974349 U CN 202974349U CN 201220297341 CN201220297341 CN 201220297341 CN 201220297341 U CN201220297341 U CN 201220297341U CN 202974349 U CN202974349 U CN 202974349U
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- flow
- differential pressure
- pressure
- measuring
- pressure transmitter
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Abstract
The utility model relates to device capable of measuring the flows of mediums of different densities, belongs to the technical field of flow measuring equipment, and mainly solves the technical problem that one same measuring device in the prior art can not be used for measuring the flows of mediums of different densities at the same time. The technical scheme of the utility is as follows: the device capable of measuring the flows of mediums of different densities mainly comprises a flow primary element, a high-pressure flow differential pressure transmitter, a low-pressure flow differential pressure transmitter, a signal controller, a flow calculating instrument, and a pressure and temperature sensor; the flow primary element is mounted on a medium transmission pipeline; the high-pressure flow differential pressure transmitter and the low-pressure flow differential pressure transmitter are connected between the flow primary element and input end of the signal controller in a parallel manner; the output end of the signal controller is connected with the input end of the flow calculating instrument; and the pressure and temperature sensor is connected behind the flow calculating instrument.
Description
Technical field
The utility model relates to a kind of device of measuring the different densities rate-of flow, belongs to the flow measurement technical field.
Background technology
At present, both at home and abroad the differential pressure flowmeter measuring flow all is based upon within the range ability of differential pressure transmitter and carries out flow measurement, and in case set complete to its running parameter, whole flow apparatus can only be measured the data on flows of a kind of density medium more exactly, and measurement range is narrower, exceeds the output signal of its measurement range or do not reach as small-signal excision or precision to require to cause larger Error of flowrate computation.in addition, each enterprise is in actual production process, the pipeline of same pumped (conveying) medium, within the different time periods, need to carry the medium of 2 kinds of different densities in pipeline, because its flow range differs larger, when using existing flow device to measure, usually exceed its effective measurement range, produce larger measuring error, and existing measuring apparatus only has a final metering cumulative amount, can not be with the separately metering of medium of 2 kinds of different densities, medium price due to 2 kinds of different densities, calorific value is different, normal production and operation and the energy have been affected, cost management, cause very large puzzlement for supplier and user, reach the purpose of classification metering in the urgent need to designing a kind of new measuring apparatus, be production and operation, the energy, cost management provides accurate data.
There is the defective that can not accurately detect wide range of traffic or can't detect low discharge in differential pressure flowmeter, and its main cause is:
(1) the differential pressure flowmeter measuring equipment is that the maximum flow according to measured medium, flow commonly used, minimum flow and pipeline correlation parameter are determined, often in use, the flow because of the measured medium of technique change can exceed its normal measurement range.
(2) the former differential pressure transmitter that is equipped with is the range transmitter of selecting according to maximum differential pressure value corresponding to primary element design maximum flow, the differential pressure value of low discharge often exceeds the accuracy rating of transmitter, drift can occur or as the small-signal excision, directly affect measuring accuracy.
Summary of the invention
The purpose of this utility model is to provide a kind of flow measurement device of measuring the different densities medium, solves mainly that in prior art, same measurement mechanism can not carry out the technical matters of Measurement accuracy simultaneously to the flow of different densities medium.
The technical solution adopted in the utility model is:
A kind of device of measuring the different densities rate-of flow, mainly formed by flow primary element, high pressure flow differential pressure transmitter, low pressure flow differential pressure transmitter, signal controller, flow clearing instrument and pressure, temperature sensor, the flow primary element is arranged on the medium transport pipeline, access high pressure flow differential pressure transmitter and low pressure flow differential pressure transmitter in mode arranged side by side between the input end of flow primary element and signal controller, the output terminal of signal controller is connected with the input end of flow clearing instrument, is serially connected with pressure, temperature sensor after flow clearing instrument.
When measuring the flow of two kinds of different densities media, first total flow range according to measured different densities medium, the flow primary element of selecting measurement range to be complementary with it, according to the height of 2 kinds of measured different densities rate-of flows, set a high flow capacity scope and a low discharge scope again; Measure respectively high flow capacity differential pressure signal and the low discharge differential pressure signal of two kinds of different densities media with high pressure flow differential pressure transmitter, low pressure flow differential pressure transmitter, high pressure flow differential pressure transmitter, low pressure flow differential pressure transmitter output to respectively signal controller with differential pressure signal, signal controller compares judgement with two-way differential pressure signal value and its preset signals value that receives, and the signal value that in the utility model, signal controller is preset is the output signal value of high pressure flow differential pressure transmitter corresponding to the lower limit flow of high flow capacity medium.
During the default signal value of the differential pressure signal value 〉=signal controller that receives when signal controller, signal controller is judged as the useful signal value with the output signal value of high pressure flow differential pressure transmitter, and this signal is exported to flow clearing instrument, flow clearing instrument only measures the flow of medium according to the output signal value of high pressure flow differential pressure transmitter; Pressure, temperature sensor are measured pressure, the temperature of medium.What at this moment, the utility model was surveyed is flow, pressure, the temperature of high flow capacity medium.
Again, during the default signal value of the differential pressure signal value＜signal controller that receives when signal controller, signal controller is judged as the useful signal value with the output signal value of low pressure flow differential pressure transmitter, and this signal is exported to flow clearing instrument, flow clearing instrument only measures the flow of medium according to the output signal value of low pressure flow differential pressure transmitter; Pressure, temperature sensor are measured pressure, the temperature of medium.What at this moment, the utility model was surveyed is flow, pressure, the temperature of low discharge medium.
The utility model has following good effect compared to existing technology:
1. the utility model is by adopting signal controller, realized when measuring two kinds of different density medium, do not need to carry out the switching of measurement mechanism, can measure the flow of two kinds of different densities media with same measurement mechanism at same station, reduced because of handover measurement device shut down time, improve production efficiency, reduced production cost.
2. the utility model is easy to operate, two differential pressure transmitter can be measured 2 kinds of different flow media simultaneously, has realized the Measurement accuracy to low discharge, has improved the measuring accuracy of flow, avoided larger measuring error occurring because 2 kinds of different rate-of flows differ larger.
3. the utility model measurement range is wide, two flow measurement range are arranged, a high flow capacity scope and a low discharge scope, the output signal of the differential pressure transmitter that two corresponding differential pressure range scopes are different is input to same signal controller, signal controller can judge the two paths of signals of accepting, identify the kind of measured medium, thereby two kinds of different media are carried out respectively the cumulative clearing of flow.
Description of drawings
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, 4-low pressure flow differential pressure transmitter, 5-signal controller, 6-flow clearing instrument, 7-pressure, temperature sensor.
Embodiment
a kind of device of measuring the different densities rate-of flow, mainly by standard orifice plate, model is YYK-630LX flow primary element 2, model is 3051CD1A high pressure flow differential pressure transmitter 3, model is 3051CD0A low pressure flow differential pressure transmitter 4, model is MY4NJ signal controller 5, model is that XLF-51 flow clearing instrument 6 and model are PT100 pressure, temperature sensor 7 forms, flow primary element 2 is arranged on medium transport pipeline 1, be connected with high pressure flow differential pressure transmitter 3 and low pressure flow differential pressure transmitter 4 in mode arranged side by side between the input end of flow primary element 2 and signal controller 5, the output terminal of signal controller 5 is connected with the input end of flow clearing instrument 6, be serially connected with pressure after flow clearing instrument 6, temperature sensor 7.
The coal gas of converter that different time sections is successively carried in measuring same gas piping and when passing through the gas flow of these two kinds of different densities of mixed gas that proportioning forms by blast furnace gas and coke-oven gas, the coal gas of converter flow is high, and flow range is 9000～18000Nm3/h usually; Mixed gas flow is low, and flow range is 0～8000Nm3/h usually; Effective measuring-signal scope of high pressure flow differential pressure transmitter 3 is set as 8～20mA, effective measuring-signal of low pressure flow differential pressure transmitter 4 is 4～20mA, high pressure flow differential pressure transmitter 3 and low pressure flow differential pressure transmitter 4 output to signal controller 5 with the differential pressure signal value of survey coal gas, and the output signal of the high pressure flow differential pressure transmitter 3 that coal gas of converter flux lower limit 9000Nm3/h is corresponding is output as 8mA.
The output signal of high pressure flow differential pressure transmitter 3 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.
When table 1 is 18000Nm3/h when the coal gas of converter maximum flow,
Coal gas of converter instantaneous delivery and differential pressure transmitter output signal mapping table
| Output signal I (mA) | 4 | 5 | 8 | 13 | 20 |
| Instantaneous delivery q (Nm 3/h) | 0 | 4500 | 9000 | 13500 | 18000 |
The output signal of low pressure flow 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.
It is 8000Nm that table 2 is worked as the mixed gas maximum flow
3During/h,
Mixed gas instantaneous delivery and differential pressure transmitter 4 output signal mapping tables
| Output signal I (mA) | 4 | 5 | 8 | 13 | 20 |
| Instantaneous delivery q (Nm 3/h) | 0 | 2000 | 4000 | 6000 | 8000 |
Signal controller 5 default signal values are the output signal value 8mA of the high pressure flow differential pressure transmitter 3 that under coal gas of converter, limit flow 9000Nm3/h is corresponding:
During the differential pressure signal value that receives when signal controller 5 〉=8mA, signal controller 5 is judged as the useful signal value with the output signal value of high pressure flow differential pressure transmitter 3, and this signal is exported to flow clearing instrument 6,6 flows according to the output signal value metering coal gas of high pressure flow differential pressure transmitter 3 of flow clearing instrument; Pressure, the temperature of pressure, 7 pairs of coal gas of temperature sensor are measured.What at this moment, the utility model was surveyed is flow, pressure, the temperature of coal gas of converter.
Again, during the differential pressure signal value that receives when signal controller＜8mA, signal controller is judged as the useful signal value with the output signal value of low pressure flow differential pressure transmitter 4, and this signal is exported to flow clearing instrument 6,6 flows according to the output signal value metering coal gas of low pressure flow differential pressure transmitter 3 of flow clearing instrument; Pressure, the temperature of pressure, 7 pairs of coal gas of temperature sensor are measured.What at this moment, the utility model was surveyed is flow, pressure, the temperature of mixed gas.
The utility model has been realized the coal gas of coal gas of converter and two kinds of different densities of mixed gas is carried out respectively the purpose of flow, pressure, temperature measurement.
Claims (1)
1. device of measuring the different densities rate-of flow, mainly by the flow primary element, the high pressure flow differential pressure transmitter, the low pressure flow differential pressure transmitter, flow clearing instrument and pressure, temperature sensor forms, the flow primary element is arranged on the medium transport pipeline, it is characterized in that, also comprise signal controller, access high pressure flow differential pressure transmitter and low pressure flow differential pressure transmitter in mode arranged side by side between the input end of flow primary element and signal controller, the output terminal of signal controller is connected with the input end of flow clearing instrument, be serially connected with pressure after flow clearing instrument, temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297341 CN202974349U (en) | 2012-06-25 | 2012-06-25 | Device capable of measuring flows of mediums of different densities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297341 CN202974349U (en) | 2012-06-25 | 2012-06-25 | Device capable of measuring flows of mediums of different densities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202974349U true CN202974349U (en) | 2013-06-05 |
Family
ID=48515409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220297341 Expired - Fee Related CN202974349U (en) | 2012-06-25 | 2012-06-25 | Device capable of measuring flows of mediums of different densities |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202974349U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868822A (en) * | 2013-07-29 | 2014-06-18 | 北京朗新明环保科技有限公司 | Density determination device for slurry in wet desulfurization absorption tower |
| CN103983314A (en) * | 2014-05-29 | 2014-08-13 | 河北钢铁股份有限公司承德分公司 | Gas flow measuring device and gas flow control method |
| 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 |
-
2012
- 2012-06-25 CN CN 201220297341 patent/CN202974349U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868822A (en) * | 2013-07-29 | 2014-06-18 | 北京朗新明环保科技有限公司 | Density determination device for slurry in wet desulfurization absorption tower |
| CN103983314A (en) * | 2014-05-29 | 2014-08-13 | 河北钢铁股份有限公司承德分公司 | Gas flow measuring device and gas flow control method |
| CN103983314B (en) * | 2014-05-29 | 2017-01-11 | 河北钢铁股份有限公司承德分公司 | Gas flow measuring device and gas flow control method |
| 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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| 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: 20130605 Termination date: 20200625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |