CN104236640B - Gas flow method is measured indirectly using the flow control valve of installation in the duct - Google Patents
Gas flow method is measured indirectly using the flow control valve of installation in the duct Download PDFInfo
- Publication number
- CN104236640B CN104236640B CN201410415867.3A CN201410415867A CN104236640B CN 104236640 B CN104236640 B CN 104236640B CN 201410415867 A CN201410415867 A CN 201410415867A CN 104236640 B CN104236640 B CN 104236640B
- Authority
- CN
- China
- Prior art keywords
- regulating valve
- flow
- gas
- measuring device
- formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
It is a kind of to measure gas flow method indirectly using the flow control valve of installation in the duct, belong to pipeline gas flow measurement equipment and method and technology field.Its technical solution is：Regulating valve is installed on gas pipeline, upstream pressure measuring device is installed on the gas pipeline of regulating valve front portion, downstream pressure measuring device is installed on the gas pipeline at regulating valve rear portion, temperature measuring equipment is installed on the rear portion of downstream pressure measuring device, and regulating valve, upstream pressure measuring device, downstream pressure measuring device, the output signal of temperature measuring equipment are connected with field control station respectively.The present invention is without using flow instrument equipment, gas flow is calculated indirectly using pressure value before and after the discharge characteristic of the regulating valve of installation, flow coefficient C i values calculation formula, regulating valve and temperature value, compared with the orifice flowmeter of actual installation, flow error can be controlled in the range of ± 3%, for instructing technique productions, solves the problem that can not be installed flowmeter in scene or lack the flow measurement of flowmeter.
Description
Technical field
The present invention relates to a kind of simple gas flow measurement device and measuring method, belong to pipeline gas flow measurement equipment
And method and technology field.
Background technology
In smelter industrial production, pipeline gas flow generally uses the standard knot such as orifice plate and plug-in type gas flowmeter
Flow device and carry out flow measurement, recycle regulating valve that gas flow is adjusted.From standard throttle apparatus and the stream of regulating valve
Amount calculation formula, which can be seen that both, the characteristics of common, is all to calculate body using pipeline section product and the product of gas flow rate
Product flow, is that gas flow is calculated as permanent area, regulating valve is variable area.Some pipelines cannot pass through gas flowmeter at present
Flow measurement is carried out Deng standard throttle apparatus, its reason one is that the caliber of pipeline is big, straight pipe is small, can not install flow measurement dress
Put, second, being fitted without flowmeter in accurate flow metering conduit is not required to.Therefore how to being fitted without the pipeline of flowmeter
Carry out the problem of flow measurement is current puzzlement enterprise and technical staff.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of simple gas flow measurement device and measuring method, this
Apparatus and method can calculate gas indirectly without using flow instrument equipment using the flow control valve of installation in the duct
Flow, for instructing technique productions, solves not installing in scene or lacks flowmeter but have the difficulty of the flow measurement of regulating valve
Topic.
Solving the technical solution of above-mentioned technical problem is：
A kind of simple gas flow measurement device, its composition include gas pipeline, regulating valve, upstream pressure measurement dress
To put, downstream pressure measuring device, temperature measuring equipment, field control station, operator station, regulating valve is installed on gas pipeline,
Along the direction of gas flow, upstream pressure measuring device is installed on the gas pipeline of regulating valve front portion, downstream pressure measurement dress
Put on the gas pipeline at regulating valve rear portion, temperature measuring equipment is installed on the rear portion of downstream pressure measuring device, adjusts
Valve, upstream pressure measuring device, downstream pressure measuring device, the output signal of temperature measuring equipment connect with field control station respectively
Connect, field control station is connected with operator station.
Above-mentioned simple gas flow measurement device, the regulating valve are electric and pneumatic regulating valve, and upstream pressure measurement fills
It is pressure transmitter to put with downstream pressure measuring device, and temperature measuring equipment is Pt100 thermal resistances.
Using the gas flow measurement method of above-mentioned simple gas flow measurement device, it uses following steps：
1st, the installed discharge characteristic of regulating valve and the flow rate calculation formula of this regulating valve are determined
The discharge characteristic of smelter gas flow regulating valve is one kind in linear characteristic and log characteristic, and regulating valve is selected
After type, discharge characteristic just has determined that；
The flow formula of the regulating valve of linear characteristic is：
The flow formula of the regulating valve of log characteristic is：
In formula (1), formula (2)：QiFlow under-regulating valve l apertures, Nm3/h；
QMAXThe adjustable maximum stream flow of-regulating valve, Nm3/h；
QMINThe adjustable minimum discharge of-regulating valve, Nm3/h；
The aperture of l-regulating valve, 0-100%；
The maximum opening of L-regulating valve, equal to 100%.
2nd, flow coefficient C is determinediIt is worth calculation formula
The meter pressure p measured according to the upstream pressure measuring device on gas pipeline1(absolute pressure P before valve1=
100+p1, unit：100kPa), the meter pressure p that downstream pressure measuring device measures2(absolute pressure P after valve2=100+p2, it is single
Position：100kPa) the temperature t (DEG C) measured with temperature measuring equipment, judges the following conditions：
1) P is worked as2＞ 0.5P1When, it is general flowing gas, selectes the C of regulating valveiCalculation formula：
Work as Qi=QMAXWhen, Ci=CMAX, then (3) be changed into (4)：
2) P is worked as2≤0.5P1When, it is obstructed flow gas, selectes the C of regulating valveiCalculation formula：
Work as Qi=QMAXWhen, Ci=CMAX, then (5) be changed into (6)：
In formula (3)-formula (6)：QiFlow under-regulating valve l apertures, Nm3/h；
γN- gas severe, kg/Nm3；
Ci- regulating valve flow coefficient, Nm3/h；
QMAXThe adjustable maximum stream flow of-regulating valve, Nm3/h；
CMAX- regulating valve maximum stream flow coefficient；
3rd, determine to calculate formula by the gas flow of regulating valve
1) P is worked as2＞ 0.5P1When, it is general flowing gas
When regulating valve is linear characteristic, (4) are substituted into (1) and obtain (7)：
When regulating valve is log characteristic, (4) are substituted into (2) and obtain (8)：
2) P is worked as2≤0.5P1When, it is obstructed flow gas
When regulating valve is linear characteristic, (6) are substituted into (1) and obtain (9)：
When regulating valve is log characteristic, (6) are substituted into (2) and obtain (10)：
4th, the gas flow of regulating valve is calculated
Calculated respectively by formula (7)-formula (10) has the straight line special corresponding to general flowing gas, obstructed flow gas
The gas flow of property and the regulating valve of log characteristic.
The invention has the beneficial effects that：
The present invention provides a kind of simple gas flow measurement device and measuring method, this apparatus and method can not make
With flow instrument equipment, pressure before and after the discharge characteristic of the regulating valve of installation, flow coefficient C i values calculation formula, regulating valve is utilized
Value calculates gas flow indirectly with temperature value, and compared with the orifice flowmeter of actual installation, flow error can control ± 3%
In the range of, for instructing technique productions, flowmeter can not be installed or lack flowmeter by solving in some industrial sites
The problem of flow measurement.It is the configuration of the present invention is simple, easy to use, solve the problem in actual production in simple method,
Especially suitable for not being very accurate Workplace to flow measurement requirement, proved by actual use, this device and survey
Amount method can meet the needs of general technology production completely, saved equipment, reduced production cost.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Marked in figure as follows：Gas pipeline 1, regulating valve 2, upstream pressure measuring device 3, downstream pressure measuring device 4, temperature
Spend measuring device 5, field control station 6, operator station 7.
Embodiment
Since regulating valve is the indispensable equipment of flow-rate adjustment in metallurgical industry production, regulating valve can be thus utilized
Discharge characteristic formula Simple Calculation gas flow.Using the discharge characteristic of regulating valve, it can be used for non-accurate metering occasion letter
Single estimation gas flow, instructs technique productions.The method of this easy estimation gas flow can be used for following occasion：One
It is that caliber is big, straight pipe is small, can not install flow measurement device；Second, mounted Causing Flowmeter Damages；Third, it is not required to accurately flow
The occasion of gauge amount.Proved by actual use, this method fully meets the needs of general technology production, has simple and practical
The advantages of.
Shown in figure, simple gas flow measurement device include gas pipeline 1, regulating valve 2, upstream pressure measuring device 3,
Downstream pressure measuring device 4, temperature measuring equipment 5, field control station 6.
Regulating valve 2 is installed on gas pipeline 1, and along the direction of gas flow, upstream pressure measuring device 3, which is installed on, to be adjusted
Save on the anterior gas pipeline 1 of valve 2, downstream pressure measuring device 4 is installed on the gas pipeline 1 at 3 rear portion of regulating valve, and temperature is surveyed
Measure the rear portion that device 5 is installed on downstream pressure measuring device 4, regulating valve 2, upstream pressure measuring device 3, downstream pressure measurement dress
The output signal for putting 4, temperature measuring equipment 5 is connected with field control station 6 respectively, and field control station 6 is connected with operator station 7.
Shown in figure, regulating valve 2 is electric and pneumatic regulating valve, upstream pressure measuring device 3 and downstream pressure measurement dress
It is pressure transmitter to put 4, and temperature measuring equipment 5 is Pt100 thermal resistances.
Field control station 6 is made of inputting modular unit, output module, power module, cpu controller part, bus mother board module,
Inputting modular unit, output module, power module, cpu controller part, interface module are connected by bus mother board module and are installed on total
On line bottom plate module.
The interface module of field control station 6 is connected with operator station 7, interface module for industrial switch, ether net stencil,
One kind in fieldbus, operator station 7 are industrial computer or graphic control panel.
The regulating valve 2 of the present invention, upstream pressure measuring device 3, downstream pressure measuring device 4, temperature measuring equipment 5 are distinguished
Valve opening, upstream pressure, downstream pressure, gas temperature are detected, and these detection signals are input to field control station 6 and are carried out
Processing calculates, and obtains gas flow numerical value.
The gas flow measurement method using above-mentioned simple gas flow measurement device of the present invention, it uses following step
Suddenly：
1st, the discharge characteristic of installed regulating valve 2 is determined
The discharge characteristic of smelter gas flow regulating valve 2 be linear characteristic and log characteristic in one kind, regulating valve 2
After type selecting, discharge characteristic just has determined that.
The flow formula of the regulating valve 2 of linear characteristic is：
The flow formula of the regulating valve 2 of log characteristic is：
In formula (1), formula (2)：QiFlow under-regulating valve l apertures, Nm3/h；
QMAXThe adjustable maximum stream flow of-regulating valve, Nm3/h；
QMINThe adjustable minimum discharge of-regulating valve, Nm3/h；
(being checked in by the specification of regulating valve)；
The aperture of l-regulating valve, 0-100%；
The maximum opening of L-regulating valve, equal to 100%.
2nd, flow coefficient C is determinediIt is worth calculation formula
The meter pressure p measured according to the upstream pressure measuring device 3 on gas pipeline 11(absolute pressure P before valve1
=100+p1, unit：100kPa), the meter pressure p that downstream pressure measuring device 4 measures2(absolute pressure P after valve2=100+p2,
Unit：100kPa) the temperature t (DEG C) measured with temperature measuring equipment 5, judges the following conditions：
1) P is worked as2＞ 0.5P1When, it is general flowing gas, selectes the C of regulating valve 2iCalculation formula：
Work as Qi=QMAXWhen, Ci=CMAX, then (3) be changed into (4)：
2) P is worked as2≤0.5P1When, it is obstructed flow gas, selectes the C of regulating valve 2iCalculation formula：
Work as Qi=QMAXWhen, Ci=CMAX, then (5) be changed into (6)：
In formula (3)-formula (6)：QiFlow under-regulating valve l apertures, Nm3/h；
γN- gas severe, kg/Nm3；
Ci- regulating valve flow coefficient, Nm3/h；
QMAXThe adjustable maximum stream flow of-regulating valve, Nm3/h；
CMAX- regulating valve maximum stream flow coefficient (is checked in) by the specification of regulating valve.
In theory, in formula (4), formula (6), P1、P2In before valve when should correspond to 2 standard-sized sheet of regulating valve maximum pressure with after valve most
Big pressure.But from the point of view of actual verification, P1、P2Pressure value under 2 a certain aperture of corresponding regulating valve, just as to gas flow
Pressure supplement, this is exactly the innovation of the present invention.
3rd, determine that the gas flow of regulating valve 2 calculates formula
1) P is worked as2＞ 0.5P1When, it is general flowing gas
When regulating valve 2 is linear characteristic, (4) are substituted into (1) and obtain (7)：
When regulating valve 2 is log characteristic, (4) are substituted into (2) and obtain (8)：
2) P is worked as2≤0.5P1When, it is obstructed flow gas
When regulating valve is linear characteristic, (6) are substituted into (1) and obtain (9)：
When regulating valve is log characteristic, (6) are substituted into (2) and obtain (10)：
4th, the gas flow of regulating valve is calculated
Calculated respectively by formula (7)-formula (10) has the straight line special corresponding to general flowing gas, obstructed flow gas
The gas flow of property and the regulating valve of log characteristic.
Part of devices model in the embodiment of the present invention is as follows：
The pressure transmitter model of upstream pressure measuring device 3 and downstream pressure measuring device 4 is EJA530A；
The model WZP-240 of temperature measuring equipment 5；
The composition device of field control station 6 is as follows：
The model 6ES7331-7KF02-0AB0 and 6ES7321-1BL00-0AA0 of inputting modular unit；The model of output module
For 6ES7332-7KF02-0AB0 and 6ES7322-1BL00-0AA0；The model 6ES7307-1KA01-0AA0 of power module；
The model 6ES7 315-2AH14-0AB0 of cpu controller part；Model Moxa EDS-G205, the 6ES7343- of interface module
1EX30-0XE0 and 6ES7153-1AA03-0XB0；The model 6ES7390-1GF30-0AA0 of bus mother board module.
The model of operator station 7 grinds magnificent IPC-610H types.
Embodiment 1
The model ZKJW-0.6S of regulating valve 2, is gas regulator, DN800, and discharge characteristic is log characteristic, R=25
(being provided by regulating valve operation instructions), coal gas density γN=1.36kg/m3, Cmax=217000.
The meter pressure p that upstream pressure measuring device 3 measures1=4~8kPa；
Absolute pressure P before valve1=100+p1=104~108kPa=(1.04~1.08) x100kPa, unit： 100kPa；
The meter pressure p that downstream pressure measuring device 4 measures2=1~5kPa；
Absolute pressure P before valve2=100+p2=101~105kPa=(1.01~1.05) x100kPa, unit： 100kPa.
So always there is P2＞ 0.5P1。
T=-3 DEG C of the temperature (data in November in winter) that temperature measuring equipment 5 measures.
It is selected to calculate flow formula (8).Detailed data is calculated and see the table below.
Embodiment 2
The model ZKJW-0.6S of regulating valve 2, is combustion air regulating valve, DN1000, and discharge characteristic is log characteristic, R=
25 (being provided by regulating valve operation instructions), combustion air density γN=1.29kg/m3, the maximum stream flow coefficient C of regulating valve 2MAX=
32000 (being provided by regulating valve operation instructions).
The meter pressure p that upstream pressure measuring device 3 measures1=9.5~12kPa；
Absolute pressure P before valve1=100+p1=109.5~112kPa=(1.095~1.12) x100kPa, unit：
100kPa；
The meter pressure p that downstream pressure measuring device 4 measures2=4.5~8kPa；
Absolute pressure P before valve2=100+p2=104.5~108kPa=(1.045~1.08) x100kPa, unit：
100kPa。
So always there is P2＞ 0.5P1。
T=-3 DEG C of the temperature (data in November in winter) that temperature measuring equipment 5 measures.
It is selected to calculate flow formula (8).Detailed data is calculated and see the table below.
The method of calculation error is in table：The branch gas tube flow Q that flowmeter is measured1(Nm3/ h), what simple and easy method calculated
Gas flow QCoal(Nm3/ h), flowmeter branch gas tube maximum stream flow is 32000 (Nm3/ h), gas flow error (%)=(QCoal-
Q1)/32000x100%；The combustion air branch pipe flow Q that flowmeter is measured2(Nm3/ h), the gas flow Q that simple and easy method calculatesWind
(Nm3/ h), flowmeter combustion air branch pipe maximum stream flow is 45000 (Nm3/ h), combustion air flow error (%)=(QWind-Q2)/
45000x100%.
From result of calculation as can be seen that using regulating valve come Simple Calculation gas flow, the orifice flow with actual installation
Meter compares, and flow error can be controlled in the range of ± 3%, for instructing technique productions, solves that in scene flowmeter can not be installed
Or lack the problem of the flow measurement of flowmeter.
Certain blast-furnace hot-air producer gas (combustion air) calculates flow using regulating valve and obtains current capacity contrast with flow measurement
Claims (1)
1. a kind of measure gas flow method indirectly using the flow control valve of installation in the duct, regulating valve (2) is installed on gas
On body pipeline (1), along the direction of gas flow, upstream pressure measuring device (3) is installed on the gas pipeline of regulating valve (2) front portion
(1) on, downstream pressure measuring device (4) is installed on the gas pipeline (1) at regulating valve (2) rear portion, temperature measuring equipment (5) peace
Mounted in the rear portion of downstream pressure measuring device (4), regulating valve (2), upstream pressure measuring device (3), downstream pressure measuring device
(4), the output signal of temperature measuring equipment (5) is connected with field control station (6) respectively, field control station（6）With operator station
（7）Connection；The regulating valve (2) is electric and pneumatic regulating valve, and the upstream pressure measuring device (3), downstream pressure measure
Device (4) is pressure transmission device, and temperature measuring equipment (5) is Pt100 thermal resistances；It is characterized in that using following steps：
A, the installed discharge characteristic of regulating valve and the flow rate calculation formula of this regulating valve are determined
The discharge characteristic of smelter gas flow regulating valve be linear characteristic and log characteristic in one kind, regulating valve type selecting
Afterwards, discharge characteristic just has determined that；
The flow formula of the regulating valve of linear characteristic is：
The flow formula of the regulating valve of log characteristic is：
In formula (1), formula (2)：- regulating valveFlow under aperture, Nm3/h；
The adjustable maximum stream flow of-regulating valve, Nm3/h；
The adjustable minimum discharge of-regulating valve, Nm3/h；
The aperture of-regulating valve, 0-100%；
The maximum opening of-regulating valve, equal to 100%；
B, flow coefficient C is determinediIt is worth calculation formula
Absolute pressure P1 before valve=（100+ p1 ）/ 100, P1 unit are 100kPa, and p1 units are kPa；Absolute pressure P2 after valve
=（100+ p2 ）/ 100, P2 unit are 100kPa, and p2 units are kPa；Surveyed according to the upstream pressure on gas pipeline
The temperature that the meter pressure p2 and temperature measuring equipment that the meter pressure p1 that measures of amount device, downstream pressure measuring device measure are measured
t（℃）, judge the following conditions：
A. P is worked as2＞ 0.5P1When, it is general flowing gas, selectes the C of regulating valveiCalculation formula：
Work as Qi=QMAXWhen, Ci=CMAX, then (3) be changed into (4)：
B. P is worked as2≤0.5P1When, it is obstructed flow gas, selectes the C of regulating valveiCalculation formula：
Work as Qi=QMAXWhen, Ci=CMAX, then (5) be changed into (6)：
In formula (3)-formula (6)：- regulating valveFlow under aperture, Nm3/h；
*- gas severe, kg/Nm3；
Ci- regulating valve flow coefficient, Nm3/h；
*The adjustable maximum stream flow of-regulating valve, Nm3/h；
*- regulating valve maximum stream flow coefficient；
C, determine to calculate formula by the gas flow of regulating valve
A. P is worked as2＞ 0.5P1When, it is general flowing gas
When regulating valve is linear characteristic, (4) are substituted into (1) and obtain (7)：
When regulating valve is log characteristic, (4) are substituted into (2) and obtain (8)：
B. P is worked as2≤0.5P1When, it is obstructed flow gas
When regulating valve is linear characteristic, (6) are substituted into (1) and obtain (9)：
When regulating valve is log characteristic, (6) are substituted into (2) and obtain (10)：
D, the gas flow of regulating valve is calculated
Calculated respectively by formula (7)-formula (10) has linear characteristic corresponding to general flowing gas, obstructed flow gas
With the gas flow of the regulating valve of log characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415867.3A CN104236640B (en) | 2014-08-22 | 2014-08-22 | Gas flow method is measured indirectly using the flow control valve of installation in the duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415867.3A CN104236640B (en) | 2014-08-22 | 2014-08-22 | Gas flow method is measured indirectly using the flow control valve of installation in the duct |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104236640A CN104236640A (en) | 2014-12-24 |
| CN104236640B true CN104236640B (en) | 2018-05-04 |
Family
ID=52225173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410415867.3A Active CN104236640B (en) | 2014-08-22 | 2014-08-22 | Gas flow method is measured indirectly using the flow control valve of installation in the duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104236640B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10365666B2 (en) * | 2015-09-11 | 2019-07-30 | Hitachi Metals, Ltd. | Mass flow controller |
| CN105181028B (en) * | 2015-09-17 | 2018-05-18 | 浙江中控软件技术有限公司 | A kind of coal gas diffusion flow On-line Measuring Method, system and application server |
| CN105335621B (en) * | 2015-11-13 | 2021-07-20 | 中国核电工程有限公司 | Model selection method for electric straight-through regulating valve |
| CN110611111A (en) * | 2019-08-19 | 2019-12-24 | 北京亿华通科技股份有限公司 | Method for measuring instantaneous hydrogen flow of fuel cell hydrogen system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307342A (en) * | 2012-03-15 | 2013-09-18 | 冯经娟 | Method for determining a fluid flow rate with a fluid control valve |
| CN103776503A (en) * | 2014-01-22 | 2014-05-07 | 东风商用车有限公司 | System for determining and regulating EGR (Exhaust Gas Recirculation) mass flow and use method thereof |
| CN204007727U (en) * | 2014-08-22 | 2014-12-10 | 河北钢铁股份有限公司承德分公司 | A kind of simple gas flow measurement device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO300437B1 (en) * | 1994-11-09 | 1997-05-26 | Jon Steinar Gudmundsson | Method for determining flow rate in a fluid stream, in particular a two-phase stream |
| JP3121735B2 (en) * | 1994-12-16 | 2001-01-09 | 株式会社クボタ | Bidirectional flow measurement method and device |
| US6441744B1 (en) * | 1999-06-29 | 2002-08-27 | Fisher Controls International, Inc. | Regulator diagnostics system and method |
| US6725167B2 (en) * | 2002-01-16 | 2004-04-20 | Fisher Controls International Llc | Flow measurement module and method |
| CN103076048A (en) * | 2012-12-29 | 2013-05-01 | 卓旦春 | Method for measuring flow of valve |
-
2014
- 2014-08-22 CN CN201410415867.3A patent/CN104236640B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307342A (en) * | 2012-03-15 | 2013-09-18 | 冯经娟 | Method for determining a fluid flow rate with a fluid control valve |
| CN103776503A (en) * | 2014-01-22 | 2014-05-07 | 东风商用车有限公司 | System for determining and regulating EGR (Exhaust Gas Recirculation) mass flow and use method thereof |
| CN204007727U (en) * | 2014-08-22 | 2014-12-10 | 河北钢铁股份有限公司承德分公司 | A kind of simple gas flow measurement device |
Non-Patent Citations (2)
| Title |
|---|
| 调节阀流通能力计算的新公式;明赐东;《化工自动化及仪表》;19820131(第1（1982）期);第50-55页 * |
| 调节阀的应用及发展趋势;刘凯 等;《管道技术与设备》;20080315(第2（2008）期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104236640A (en) | 2014-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104236640B (en) | Gas flow method is measured indirectly using the flow control valve of installation in the duct | |
| CN103365306B (en) | A kind of high-speed wind tunnel special test compressed air require adjusting means and method | |
| CN106233061A (en) | For the real-time system monitoring the flow through mass flow controller and method | |
| CN103282748A (en) | Flow rate measurement device and flow rate measurement method of flow rate controller for gas feeder | |
| TWI633283B (en) | Gas supply device capable of measuring flow rate, flow meter, and flow rate measurement method | |
| CN103837215B (en) | Commutation valve type p.V.T.t method gas flow meter | |
| US20140208755A1 (en) | Gas Turbine Air Mass Flow Measuring System and Methods for Measuring Air Mass Flow in a Gas Turbine Inlet Duct | |
| CN104502161A (en) | Calibration equipment of dust sampler | |
| CN105092250A (en) | ACM testing stand | |
| CN204330091U (en) | Bell jar type gas flowmeter calibrating installation | |
| US20210008583A1 (en) | Paint Flow Balancing | |
| CN106594525B (en) | Gas pipeline pressure flow hybrid control system integration sledge fills method | |
| WO2016004471A1 (en) | Measurement of flow through pipelines | |
| CN204007727U (en) | A kind of simple gas flow measurement device | |
| CN207569288U (en) | Device for automatically adjusting pressure | |
| CN103900665A (en) | Container combination and reversing valve type pVTt-method gas flow device | |
| CN211015169U (en) | Control system for temperature of pipeline confluence liquid | |
| RU2628657C2 (en) | Method of verification and calibration of gas meters | |
| CN110908414A (en) | System and method for controlling temperature of pipeline confluence liquid | |
| CN105091967B (en) | A kind of flow-measuring method using barrier in pipeline itself or pipeline | |
| CN106353010A (en) | Comprehensive verification device for calorimeters or water meters | |
| CN104267747B (en) | A kind of flow detector and numerical modeling method thereof | |
| CN208476364U (en) | A kind of apparatus for calibrating water meter | |
| CN109520595A (en) | A kind of direct corrector CALIBRATING DEVICE FOR LARGE DIAMETER GAS FLOWMETER | |
| CN202453012U (en) | Multi-step dual-pore plate differential pressure fluid flow measurement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wei Jinhui Inventor after: Wang Songjun Inventor after: Jiang Haigang Inventor after: Ji Xiaotong Inventor after: Sun Zhihui Inventor before: Wei Jinhui |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180403 Address after: 067102 Chengde City, Hebei province shuangluanou Luanhe town of Chengde Steel Company Office Building No. 3 Applicant after: Chengde Chenggang Engineering Technology Co., Ltd. Address before: 067102 Chengde city in Hebei Province town of Luanhe Shuangluan District Finance square, Hebei iron and steel Limited by Share Ltd Chengde branch Applicant before: Chengde Branch Co., Ltd. of Hebei Iron & Steel Group |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |