CN207649729U - A kind of gas flow automated calibration system device - Google Patents

A kind of gas flow automated calibration system device Download PDF

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Publication number
CN207649729U
CN207649729U CN201720954262.0U CN201720954262U CN207649729U CN 207649729 U CN207649729 U CN 207649729U CN 201720954262 U CN201720954262 U CN 201720954262U CN 207649729 U CN207649729 U CN 207649729U
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CN
China
Prior art keywords
gas flow
gas
flow
standard scale
experiment table
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Application number
CN201720954262.0U
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Chinese (zh)
Inventor
胡开明
李跃忠
赖建岩
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东华理工大学
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Priority to CN201720954262.0U priority Critical patent/CN207649729U/en
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Publication of CN207649729U publication Critical patent/CN207649729U/en

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Abstract

The utility model discloses a kind of gas flow automated calibration system device, including modular system, experiment table, flow measuring and controlling computer, regulating valve and escape pipe, it is characterised in that:Standard scale is concatenated with experiment table, the centre of standard scale and experiment table is compensation device, gas passes through modular system gas generation apparatus first, then standard scale detection gas flow, current stabilization control is carried out using PLC and frequency converter, complete closed-loop measuring and control gas flow, there is a regulating valve in the centre of temperature sensor and pressure sensor, temperature sensor, pressure sensor, standard scale and experiment table all feedback data are to PLC, flow measuring and controlling computer passes through RS 485 and plc communication, gas flow measurement and control are completed, last gas is discharged from escape pipe.Its advantage is that:The online real stream calibrating for realizing gas flow, can automatically complete data analysis and processing, existing verification process automation and high efficiency, reduce the working strength of operating personnel, improve calibrating effect.

Description

A kind of gas flow automated calibration system device

Technical field

The utility model is related to automatic fields, and in particular to a kind of gas flow automated calibration system device.

Background technology

Flow measurement is an important parameter in energy measurement, has thousand ten thousand with the national economic development and people's lives The contact of thread.The calorimeter used for gas meter, water meter and the heat supply of meterage in residential households, to domestic inlet and outlet Crude oil, natural gas trade settlement etc. it is invariably related with flowmeter.It is energy saving in order to scientifically use gas, it needs to use gas Flowmeter body accurately measures gas flow, and gas flow calibrating device is exactly to ensure the accurate of gas flowmeter The equipment of degree and the identification gas flowmeter of foundation.Therefore meter proof and the accuracy of calibration are that flow value transmits or traces to the source In most important link, be not only related to the economic interests of trade both sides, but also have to the development of Chinese national economy critically important Social benefit.China is in the scientific management of the energy and resource at present, and there is also larger gaps compared with advanced country.Unit For the cost that GDP is paid far more than developed country, the backwardness of flowmeter instrument and calibrated horizontal is one of reason.Due in the energy With in the utilization and international cooperation of resource, the need of the standard set-up of flowmeter and its calibration for each bore and each flow Ask very prominent.And the calibration of domestic flow and calibrating installation are mostly introduction or the ready-made technology of foreign imitation, there are larger Limitation.So the standard set-up of the gas flow meter calibrating of structure, to realize the high-precision calibrating of flowmeter and examine and determine in section Learn has important application background using with energy management aspect.

Most domestic flow standard device is still manually control verification discharge capacity at present, manual record data, artificial The manufacturer of calculating error, part scientific research institution and calibrating installation also begins to research automatic control system, although also working out Some achievements, but various flow regimes when flow standard device all cannot correctly reappear flow meters work, calibration accuracy is low, Effect is poor.Since flow is that a dynamic is measured, flow measurement technology is complicated, and the condition of flow is diversified, the height of temperature, The variation of pressure, flow velocity size, flow regime of fluid etc. all have an impact measurement.

Utility model content

It devises gas flow purpose of the utility model is to solve the above problem and flows the computer calibrated automatically in fact Control device, calibration at this time can really be included in influence of the various factors to flow instrument function, improve calibrating efficiency and Precision.

The technical solution of the utility model is:A kind of gas flow automated calibration system device, including modular system, experiment Table, flow measuring and controlling computer, regulating valve and escape pipe, modular system include gas generation apparatus, flow control, compensation device and Standard scale, volume control device include PLC and frequency converter, and compensation device includes temperature sensor and pressure sensor, feature It is:Standard scale is concatenated with experiment table, and the centre of standard scale and experiment table is compensation device, and gas passes through modular system gas first Body generation device, then standard scale detection gas flow carry out current stabilization control using PLC and frequency converter, complete closed-loop measuring with Gas flow is controlled, there are a regulating valve, temperature sensor, pressure sensor, mark in the centre of temperature sensor and pressure sensor To PLC, flow measuring and controlling computer is completed gas stream and is measured by RS-485 and plc communication for quasi- table and experiment table all feedback data Amount and control, last gas are discharged from escape pipe.

Gas generation apparatus described in the utility model is air pump model HG-370-C.

It is LWQ-M250SLENN that standard scale described in the utility model, which selects gas swirl flow meter model,.

PLC type number described in the utility model is CPU224XP+EM235.

The model D700 of frequency converter described in the utility model.

Flow measuring and controlling computer described in the utility model writes the control algolithms such as meter operation interface, PID using configuration software With the transmission procedure (being all known) of control parameter.

Calibration system described in the utility model is verified and test experiments table in such a way that standard scale is concatenated with experiment table Performance indicator.Calibration system further includes stainless steel frame, programmable control box, stainless steel water tank, organic glass liquid level water The compositions such as case, three-phase magnetic pump.Pipeline fact temperature and pressure value is obtained by temperature and pressure sensor measurement, realizes flow The temperature and pressure compensation of measured value.Flow measuring and controlling computer writes the control algolithms such as meter operation interface, PID using configuration software Gas flow measurement and control are completed by RS-485 and plc communication with the transmission procedure of control parameter.Set experiment institute After the flow needed, controlling controlled device by control algolithm makes pipeline flow value reach setting value.Experiment table is mounted on standard In system, simultaneously by the variation tendency and error degree of regular and irregular change setting flow value observation experiment table and standard scale Comparison record is to realize the calibration to testing table.

The beneficial effects of the utility model:The online real stream calibrating for realizing gas flow, can automatically complete data Analysis and processing realize verification process automation and high efficiency, reduce the working strength of operating personnel, improve calibrating effect. Efficiency is opposite when and utilization simple gas standard device more and more for gas flow measurement occasion examines and determine gas flowmeter Lower present situation develops the online computer measurement and control system examined and determine in real time of gas flow standard device, according to tested instrument Pipeline flow field characteristic selects corresponding experimental facilities device and investigating method.Standard set-up is completed under configuration info management environment Calibrating, in the one-shot measurement time as defined in tested meter proof regulation, computer acquires checklist simultaneously and standard scale is defeated The flow signal gone out, and be utilized respectively temperature, pressure value is modified to obtain flow under corresponding mark condition to flow, then with mark The flow value that quasi- table measures is compared, and the error and instrument coefficient of checklist instruction flow value is obtained, according to the result of test Modified flow rate instrument coefficient;By repeatedly measuring to obtain the repeatability and linearity error of tested instrument, standard set-up is completed The analysis of uncertainty, it is ensured that calibrating quality.Under the premise of ensureing higher calibration accuracy, flowmeter is improved to a greater extent and is existed Calibrating efficiency during the manufacturing.System has the various data of automatic alarm, automatic collection, automatic calculating and beats automatically The functions such as report and storage data are printed, realize calibration process automation, high-precision and high efficiency.

Description of the drawings

Fig. 1 is the calibration system structure chart of the utility model.

With reference to attached drawing, 1 is modular system;11 be gas generation apparatus;12 be volume control device;121 be PLC:122 are Frequency converter 13 is compensation device;131 be temperature sensor;132 be pressure sensor 14 be standard scale 2 be experiment table;3 be flow Measurement &control computer;4 be regulating valve;5 be escape pipe.

Specific implementation mode

As shown in Figure 1, the utility model is such to work, a kind of gas flow automated calibration system device, including Modular system (1), experiment table (2), flow measuring and controlling computer (3), regulating valve (4) and escape pipe (5), modular system (1) include Gas generation apparatus (11), volume control device (12), compensation device (13) and standard scale (14), volume control device (12) packet PLC (121) and frequency converter (122) are included, compensation device (13) includes temperature sensor (131) and pressure sensor (132), spy Sign is:Standard scale (14) is concatenated with experiment table (2), and standard scale (14) and the centre of experiment table (2) are compensation device (13), gas Body is first by modular system (1) gas generation apparatus (11), then standard scale (14) detection gas flow, using PLC (121) Current stabilization control is carried out with frequency converter (122), completes closed-loop measuring and control gas flow, temperature sensor (131) and pressure pass There are a regulating valve (4), temperature sensor (131), pressure sensor (132), standard scale (14) and experiment in the centre of sensor (132) Table (2) all feedback data give PLC (121), flow measuring and controlling computer (3) to be communicated with PLC (121) by RS-485, complete gas Flow measurement and control, last gas are discharged from escape pipe (5).

The performance that calibration system verifies in such a way that standard scale (14) is concatenated with experiment table (2) with test experiments table refers to Mark.Calibration system further includes stainless steel frame, programmable control box, stainless steel water tank, organic glass liquid level water tank, three-phase magnetic The compositions such as power pump.Pipeline fact temperature and pressure value is obtained by temperature sensor (131) and pressure sensor (132) measurement, Realize the temperature and pressure compensation of flow measurements.Flow measuring and controlling computer (3) using configuration software write meter operation interface, The transmission procedure of the control algolithms such as PID and control parameter is communicated by RS-485 with PLC (121), complete gas flow measurement with Control.After setting the flow needed for experiment, controlling controlled device by control algolithm makes pipeline flow value reach setting value.It will It tests table (2) to be mounted on modular system (1), setting flow value observation experiment table (2) and mark is changed by regular and irregular The variation tendency and error degree of quasi- table (14) simultaneously compare record to realize the calibration to experiment table (2).

The pid parameter that user scheduled flow value need to be arranged in host computer configuration software and obtained by certain method, Controller PLC (121) handles setting value and completes the setting of pid parameter and the control of system, and D700 receives EM235 outputs 4-20mA (25% offset) and the frequency for exporting variation.HG-370-C (wind turbine) according to the output valve of D700 change rotating speed from And realize the change of flow, the voltage value of the variation final output 4-20mA of LWQ-M250SLENN (flowmeter) detection flows is simultaneously Input PLC (121) is recorded, and PLC (121) is compensated and led to the flow value of acquisition according to real-time temperature and pressure value It crosses configuration to show, completes calibration system operation.

Claims (5)

1. a kind of gas flow automated calibration system device, including modular system (1), experiment table (2), flow measuring and controlling computer (3), regulating valve (4) and escape pipe (5), modular system (1) include gas generation apparatus (11), volume control device (12), mend Device (13) and standard scale (14) are repaid, volume control device (12) includes PLC (121) and frequency converter (122), compensation device (13) Including temperature sensor (131) and pressure sensor (132), it is characterised in that:Standard scale (14) is concatenated with experiment table (2), is marked Quasi- table (14) and the centre of experiment table (2) are compensation device (13).
2. according to a kind of gas flow automated calibration system device described in claim 1, it is characterised in that:The gas production Generating apparatus (11) is air pump model HG-370-C.
3. according to a kind of gas flow automated calibration system device described in claim 1, it is characterised in that:The standard scale (14) it is LWQ-M250SLENN to select gas swirl flow meter model.
4. according to a kind of gas flow automated calibration system device described in claim 1, it is characterised in that:The PLC (121) model CPU224XP+EM235.
5. according to a kind of gas flow automated calibration system device described in claim 1, it is characterised in that:The frequency converter (122) model D700.
CN201720954262.0U 2017-07-19 2017-07-19 A kind of gas flow automated calibration system device CN207649729U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720954262.0U CN207649729U (en) 2017-07-19 2017-07-19 A kind of gas flow automated calibration system device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720954262.0U CN207649729U (en) 2017-07-19 2017-07-19 A kind of gas flow automated calibration system device

Publications (1)

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CN207649729U true CN207649729U (en) 2018-07-24

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Application Number Title Priority Date Filing Date
CN201720954262.0U CN207649729U (en) 2017-07-19 2017-07-19 A kind of gas flow automated calibration system device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109520595A (en) * 2019-01-14 2019-03-26 李长启 A kind of direct corrector CALIBRATING DEVICE FOR LARGE DIAMETER GAS FLOWMETER
CN110220574A (en) * 2019-06-26 2019-09-10 东华理工大学 Gas flow calibration system, method and device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109520595A (en) * 2019-01-14 2019-03-26 李长启 A kind of direct corrector CALIBRATING DEVICE FOR LARGE DIAMETER GAS FLOWMETER
CN110220574A (en) * 2019-06-26 2019-09-10 东华理工大学 Gas flow calibration system, method and device

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