CN202002680U - Temperature-pressure compensation metal tube float flowmeter - Google Patents

Temperature-pressure compensation metal tube float flowmeter Download PDF

Info

Publication number
CN202002680U
CN202002680U CN2011200641642U CN201120064164U CN202002680U CN 202002680 U CN202002680 U CN 202002680U CN 2011200641642 U CN2011200641642 U CN 2011200641642U CN 201120064164 U CN201120064164 U CN 201120064164U CN 202002680 U CN202002680 U CN 202002680U
Authority
CN
China
Prior art keywords
flow
temperature
float
measuring tube
sensor
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.)
Expired - Fee Related
Application number
CN2011200641642U
Other languages
Chinese (zh)
Inventor
杨会峰
王彦平
魏强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING KONGGANG BEIGUANG METER Co Ltd
Original Assignee
BEIJING KONGGANG BEIGUANG METER Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BEIJING KONGGANG BEIGUANG METER Co Ltd filed Critical BEIJING KONGGANG BEIGUANG METER Co Ltd
Priority to CN2011200641642U priority Critical patent/CN202002680U/en
Application granted granted Critical
Publication of CN202002680U publication Critical patent/CN202002680U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model provides an integrated temperature-pressure compensation metal tube float flowmeter, which is used for real-time measurement of gas (steam) pressure, temperature and flow and has the function of temperature and pressure compensation. The integrated temperature-pressure compensation metal tube float flowmeter comprises a flow sensor and an indicator, the flow sensor comprises a measuring tube, a temperature sensor and a pressure sensor, the interior of the measuring tube consists of a conical tube (a porous board) and a float, the float is positioned in the conical tube (the porous board), a cylindrical steel magnet is inset into the float, the temperature sensor mounted on the measuring tube is used for measuring the temperature of gas in the measuring tube, the pressure sensor mounted on the measuring tube is used for measuring the pressure of the gas in the measuring tube, a flow card is mounted in the indicator, a magnetic sensor and a flow calculation module are arranged on the flow card, the magnetic sensor is connected with the flow calculation module, the temperature sensor and the pressure sensor are respectively connected with the flow card, and pressure and temperature data of the gas in the measuring tube are transmitted to the flow card in real time.

Description

The temperature and pressure compensation metal pipe float flow meter
Technical field
The utility model relates to a kind of flow measurement device that is applicable to industrial process control, relates in particular to a kind of temperature and pressure that can carry out in real time and compensates the integrated temperature and pressure compensation metal pipe float flow meter that is used for gas (steam) flow measurement.
Background technology
The measuring method and the calibration steps of metal pipe float flow meter are as follows:
The measurement of existing metal pipe float flow meter needs user's each parameter under service condition is converted, and realizes measuring by the calibration under the standard conditions.
Suppose that the user orders goods, and provides parameter under the gas condition of work: pressure (MPa): P0; Temperature (℃): T0; Density (mark condition, kg/Nm 3): ρ; Flow range (m 3/ h, kg/h, Nm 3/ h or the like): 0~F.
Temperature and pressure under the type of user's measurement gas, the gas condition of work is varied, and the condition that instrument manufacturing plant can not simulated field is come calibrated meter.No matter what gas the user measures, instrument manufacturing plant generally uses the calibration of standard air flow apparatus to metal pipe float flow meter, needs like this flow range that the user gives is converted on the flow range of corresponding air, and reduction formula is as follows:
The normal flow of tested gas is Q N(Nm/h);
Q S = ρ st ρ s × P s P t × T t T s × Q N ;
The operation flow of tested gas is Q t(m 3/ h);
Q S = ρ st ρ s × P t P s × T s T t × Q t ;
The mass rate of tested gas is Q m(kg/h);
Q S = 1 ρ t × ρ s × Q m ;
In the formula:
Q N: the maximum volume flow (Nm of gas under the calibration state 3/ h);
Q t: the maximum volume flow (m of gas under mode of operation 3/ h);
Q m: the biggest quality flow (kg/h) of gas under mode of operation;
Q s: reference fluid air mass flow (m 3/ h);
ρ sDensity (the kg/m of air under the calibration state 3);
ρ StDensity (the kg/m of gas under the calibration state 3);
ρ t: the density (kg/m of gas under mode of operation 3);
P s: the absolute pressure (0.1013MPa) of air under the calibration state;
P t: the absolute pressure (MPa) of gas under mode of operation;
T s: the absolute temperature (293.15) of air under the calibration state;
T t: the absolute temperature (K) of gas under mode of operation.
Flow range to the customer requirements measurement gas: 0~F carries out scale and converts, air mass flow: 0~F0 under the corresponding mark condition.On the air mass flow standard set-up, metal pipe float flow meter is calibrated, calibrate n point (if calibrating 10 points) generally speaking.Calibration data is write flow integrated circuit board (circuit board) be used for flowmeter calculating.
Flow integrated circuit board storage calibration data form:
The float height h0 h1 h2 h3 h4 h5 h6 h7 h8 h9 h10
Flow value 0 0.1F 0.2F 0.3F 0.4F 0.5F 0.6F 0.7F 0.8F 0.9F F
Described flow transmitter will carry out linear interpolation and obtain flow value according to calibration data stored wherein from the float height of described sensor, and will convert this flow value to the industrial standard current signal and be sent to the pulpit by cable.
From the measuring method of above-described metal pipe float flow meter as can be seen, the calibration data of the metal pipe float flow meter of measurement gas is (a pressure: P0 under certain working condition of providing of user, temperature: calibration data T0), at this working condition (pressure: P0, temperature: T0) measured value of metal pipe float flow meter is accurately down, but when gaseous tension and temperature and user in the on-the-spot pipeline provide when not being inconsistent, measurement will be inaccurate.Occur that this Things are quite normal, reason is as follows:
1) if new project, the gas parameter that the user provides (temperature, pressure) is a design parameter, and gas parameter and design parameter have difference in the pipeline when putting into operation actual motion etc. project;
When 2) normally moving immediately, gaseous tension and temperature variation also are very normal in the pipeline that factors such as seasonal variations, equipment cause.
Summary of the invention
Fundamental purpose of the present utility model, be to provide a kind of metal pipe float flow meter that has temperature and pressure compensation, gaseous tension and temperature variation in the difference that solution changes because of gas parameter in design parameter and the actual pipeline, the pipeline that causes because of factors such as seasonal variations and equipment when normally moving make the problem that error occurs of measuring.
In order to achieve the above object, the utility model provides a kind of integrated temperature and pressure compensation metal pipe float flow meter, comprises flow sensor, indicator, wherein,
Described flow sensor mainly is made of measuring tube, temperature sensor and pressure transducer, and measuring tube inside is made of tapered tube (or orifice plate) and float, and described float is arranged in described tapered tube (orifice plate), and described float inside is embedded with the cylindricality magnet steel;
The flow integrated circuit board is housed in the described indicator, and described flow integrated circuit board is provided with Magnetic Sensor and flow rate calculation module, and this Magnetic Sensor is connected with this flow rate calculation module;
It is characterized in that described temperature and pressure compensation metal pipe float flow meter also comprises temperature sensor and pressure transducer, wherein,
Described temperature sensor is installed on the described measuring tube, is used to measure the gas temperature in the described measuring tube;
Described pressure transducer is installed on the described measuring tube, is used to measure the gaseous tension in the described measuring tube;
Described temperature sensor, described pressure transducer respectively with described flow current plate card connection.
During enforcement, described temperature sensor, described pressure transducer are installed on respectively on the sidewall of described measuring tube, and described temperature sensor and described pressure transducer are positioned at upstream or other position of described float.
Compared with prior art, temperature and pressure compensation metal pipe float flow meter described in the utility model, at measuring tube sidewall setting pressure sensor and temperature sensor, measure the temperature and pressure of the gas (steam) in the described measuring tube in real time, and temperature value and the force value current according to gas (steam), in conjunction with the scale reduction formula, real-time update flow transmitter internal calibration data are the calibration data under current pressure and the temperature, use the calibration data after upgrading to carry out flow rate calculation, thereby reach the temperature pressure compensation effect, guaranteed the precision of gas flow measurement.
Description of drawings
Fig. 1 is the structural representation of existing metal pipe float flow meter;
Fig. 2 is the structural representation of a specific embodiment of temperature and pressure compensation metal pipe float flow meter described in the utility model.
Embodiment
Existing metal pipe float flow meter comprises sensor (being measuring tube) and indicator, wherein,
As shown in Figure 1, described measuring tube 1 inside is made of tapered tube (or orifice plate) 3 and float 2;
Described float 2 is arranged in described tapered tube 3, and float 2 inside are embedded with the cylindricality magnet steel, forms magnetic field around float;
Described indicator 4 is equipped with flow integrated circuit board 5, and Magnetic Sensor 6 is arranged on the flow integrated circuit board, and the current plate cartoon is crossed magnetic-coupled mode and detected float position in the measuring tube.
When detected fluid is passed through the annular space that forms between described tapered tube 3 and the described float 2 from bottom to top, be subjected to the effect of three power: G (gravity), F (buoyancy) and P (differential pressure) and viscous force (gas is ignored), when G=F+P, float is stabilized in certain altitude, and the height value of float is corresponding with the instantaneous delivery value.
Described measuring tube converts the variation of fluid flow value the variation of float height to, and the variation range of float height is approximately: 0-50mm.
Described intelligent flow integrated circuit board uses the float position that records to be converted to flow value demonstration or industrial standard current signal (4-20mA) teletransmission that the user can obtain in conjunction with calibration data.
Metal pipe float flow meter can be measured the flow value of liquid, gas and steam, and the measurement of gas (steam) is to carry out under the certain condition of temperature and pressure, temperature and pressure compensation metal pipe float flow meter described in the utility model is the technological improvement of making at gas flow measurement and flow measurement of steam, therefore, only gas flow measurement is described (flow measurement of steam is identical with gas flow measurement) below.
In order to solve the defective of metal pipe float flow meter in gas flow measurement, the utility model is at measuring tube sidewall setting pressure sensor and temperature sensor, measure the temperature and pressure of the gas in the described measuring tube in real time, and temperature value and the force value current according to gas, in conjunction with the scale reduction formula, real-time update flow transmitter internal calibration data are the calibration data under current pressure and the temperature, use the calibration data after upgrading to carry out flow rate calculation, thereby reach the temperature pressure compensation effect, guaranteed the precision of gas flow measurement.
Except comprising above-mentioned measuring tube, indicator, temperature and pressure compensation metal pipe float flow meter described in the utility model is equipped with temperature sensor and pressure transducer,
Described temperature sensor, described pressure transducer are installed on the sidewall of described measuring tube, are respectively applied for gas temperature, the gaseous tension measured in the described measuring tube;
On the flow integrated circuit board of metal pipe float flow meter, connect temperature sensor and pressure transducer, the online gas of pipeline (steam) pressure and temperature is passed to the flow integrated circuit board in real time by lead by lead;
Calibration data under the signal combination flow standard condition of the inner integrated circuit board collection of indicator pressure, temperature sensor adopts flow-compensated algorithm, calculates the actual flow value in preceding pipeline, realizes temperature and pressure compensation.Guaranteed the precision of gas flow measurement.
Below by a specific embodiment the utility model is described:
As shown in Figure 2, the structured flowchart of the described temperature and pressure compensation metal pipe float flow meter of the utility model one specific embodiment,
Described flow sensor mainly is made of measuring tube 21, temperature sensor 24 and pressure transducer 25,
Described measuring tube inside is made of tapered tube 23 (or orifice plate) and float 22, and float 22 is arranged in tapered tube 23 (orifice plate), and float 22 inside are embedded with the cylindricality magnet steel;
Described temperature sensor 24, pressure transducer 25 are installed on respectively on the sidewall of described measuring tube 21, be used for detecting the temperature and pressure of measuring tube 21 gases (steam), and described temperature sensor 24 and described pressure transducer 25 are installed on upstream or other position of described float 22; Described Magnetic Sensor 28 is positioned on the flow integrated circuit board 27; By measuring magnetic field detection float 22 positions.
Described flow integrated circuit board 27 is installed on the inside of indicator 26;
The effect of described flow integrated circuit board 27 is that float position detects, pressure, temperature signal collection, and flow rate calculation, flow shows and (4-20) mA electric current output (two-wire system).
More than explanation is just illustrative for utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claims and limited; can make many modifications, variation or equivalence, but all will fall in the protection domain of the present utility model.

Claims (2)

1. an integrated temperature and pressure compensation metal pipe float flow meter comprises flow sensor, indicator, wherein,
Described flow sensor mainly is made of measuring tube, temperature sensor and pressure transducer, and measuring tube inside is made of tapered tube and float, and described float is arranged in described tapered tube, and described float inside is embedded with the cylindricality magnet steel;
The flow integrated circuit board is housed in the described indicator, and described flow integrated circuit board is provided with Magnetic Sensor and flow rate calculation module, and this Magnetic Sensor is connected with this flow rate calculation module;
It is characterized in that described temperature and pressure compensation metal pipe float flow meter also comprises temperature sensor and pressure transducer, wherein,
Described temperature sensor is installed on the described measuring tube, is used to measure the gas temperature in the described measuring tube;
Described pressure transducer is installed on the described measuring tube, is used to measure the gaseous tension in the described measuring tube;
Described temperature sensor, described pressure transducer respectively with described flow current plate card connection.
2. temperature and pressure compensation metal pipe float flow meter according to claim 1 is characterized in that,
Described temperature sensor, described pressure transducer are installed on respectively on the described measuring tube, and described temperature sensor and described pressure transducer are positioned at the upstream of described float.
CN2011200641642U 2011-03-11 2011-03-11 Temperature-pressure compensation metal tube float flowmeter Expired - Fee Related CN202002680U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200641642U CN202002680U (en) 2011-03-11 2011-03-11 Temperature-pressure compensation metal tube float flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200641642U CN202002680U (en) 2011-03-11 2011-03-11 Temperature-pressure compensation metal tube float flowmeter

Publications (1)

Publication Number Publication Date
CN202002680U true CN202002680U (en) 2011-10-05

Family

ID=44705417

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011200641642U Expired - Fee Related CN202002680U (en) 2011-03-11 2011-03-11 Temperature-pressure compensation metal tube float flowmeter

Country Status (1)

Country Link
CN (1) CN202002680U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925969A (en) * 2014-04-30 2014-07-16 重庆川仪自动化股份有限公司 Liquid medium filling degree detection device
CN103983310A (en) * 2014-05-09 2014-08-13 金湖县仪器仪表总厂 Permanent magnet repulsion positioning type high-precision metal tube float flowmeter
CN104614023A (en) * 2015-01-13 2015-05-13 司敏 Intelligent floater gas meter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925969A (en) * 2014-04-30 2014-07-16 重庆川仪自动化股份有限公司 Liquid medium filling degree detection device
CN103983310A (en) * 2014-05-09 2014-08-13 金湖县仪器仪表总厂 Permanent magnet repulsion positioning type high-precision metal tube float flowmeter
CN104614023A (en) * 2015-01-13 2015-05-13 司敏 Intelligent floater gas meter
CN104614023B (en) * 2015-01-13 2017-12-01 司敏 A kind of intelligent float gas meter, flow meter

Similar Documents

Publication Publication Date Title
US7461562B2 (en) Process device with density measurement
CA2633792C (en) Wet gas indication using a process fluid differential pressure transmitter
CN104236816B (en) A kind of leakage detecting instrument on-line calibration device and method
CN104685324A (en) A flow meter system
CN101506629A (en) Flow measurement diagnostics
CN206311166U (en) Absolute pressure formula liquid level gauge
CN102405446B (en) Field device with measurement accuracy reporting
CN202002680U (en) Temperature-pressure compensation metal tube float flowmeter
CN102147625B (en) Detection and control device for density of regenerative acid and method
CN202522295U (en) System for calibrating turbine flow meter under condition of large flow of low-temperature medium
CN105466521A (en) Method for measuring liquid level of liquid in container
CN201697644U (en) Integrated differential pressure flowmeter
CN203881412U (en) Device for fast calibrating differential pressure type liquidometer on working condition site
CN204514538U (en) A kind of wireless pressure data collecting instrument calibrating installation with temperature-controlling system
CN202814638U (en) Gas micro differential pressure generation device
CN101876593A (en) Equipment for testing liquidity of pulse valve
CN201522317U (en) Online calibrating device of orifice-plate steam flow measuring system
CN102279029A (en) Self-calibrating putting-into-type pressure liquid level meter and measuring method thereof
CN102564912B (en) Dust concentration detecting method and detector with gas velocity compensation
CN207991653U (en) A kind of packaged type fluid flow caliberating device
CN204007805U (en) The online caliberating device of a kind of LNG filling machine
CN203745049U (en) Calibration device of gas precision flow meter
CN101871803A (en) Integrated differential-pressure-type flow meter and application method thereof
CN202133437U (en) Self-calibration drop type pressure liquid level meter
CN107796492B (en) Online calibration method for ultrasonic gas meter

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: 20111005

Termination date: 20170311