CN202693053U - Bundled thermal pulse gas flowmeter outside pipeline and capable of resisting interference of ambient temperature - Google Patents
Bundled thermal pulse gas flowmeter outside pipeline and capable of resisting interference of ambient temperature Download PDFInfo
- Publication number
- CN202693053U CN202693053U CN 201220004580 CN201220004580U CN202693053U CN 202693053 U CN202693053 U CN 202693053U CN 201220004580 CN201220004580 CN 201220004580 CN 201220004580 U CN201220004580 U CN 201220004580U CN 202693053 U CN202693053 U CN 202693053U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- temperature
- heater
- self
- measurement
- 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
Links
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 13
- 238000005057 refrigeration Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000036962 time dependent Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000737 periodic effect Effects 0.000 abstract 2
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000000691 measurement method Methods 0.000 abstract 1
- 239000004519 grease Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002571 modificatory effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Landscapes
- Measuring Volume Flow (AREA)
- Details Of Flowmeters (AREA)
Abstract
The utility model belongs to the field of flow measurement of a compressed air system, provides a bundled thermal pulse gas flowmeter outside a pipeline and capable of resisting interference of ambient temperature and mainly relates to a method and a corresponding device which can measure gas flow in the pipeline through utilization of a temperature field generated outside the pipeline according to periodic variation and on the basis of the relationship of the gas flow and variation quantity of the temperature field after the temperature field is affected by heat transfer of the gas flow. Through a self-adaption pulse heater arranged on the outer wall of the gas pipeline, the bundled thermal pulse gas flowmeter generates the temperature field according to the periodic variation. Heat signals are transmitted along the pipeline in the axial direction and are mainly affected by heat dissipation through flowing of gas in the pipeline. According to the temperature trend of a measurement point on the outer wall of the pipeline on the upstream of the heater, a relative dynamic average value is calculated. Since the relative dynamic average value is in proportion to the flow, the flow can be measured. Through adoption of the bundled installation method outside the pipeline, the bundled thermal pulse gas flowmeter is convenient to assemble and disassemble. Through adoption of the measurement method of the variable temperature filed, the bundled thermal pulse gas flowmeter can effectively restrain temperature interference in an external environment, and is little in time consumption of measurement and accurate and reliable in measurement.
Description
Technical field
The invention belongs to compressed air system flow measurement field, relate to a kind of can be anti-the outer cluster thermal pulse gas meter of pipe that disturbs of environment temperature.
Background technology
Gas is as a kind of form of energy existence or the carrier of energy, application in industry is more and more wide, and in the compressor assembly field, gas flow is the important parameter in the system, its measurement is gordian technique, and gas meter uses extensively in many commercial production occasions.
The flowmeter that is used on the market gas flow measurement, the overwhelming majority is invasive devices, such as thermal flowmeter, differential pressure flowmeter, target type meter etc., need series connection access pipeline, complicated operation not only, affect commercial production during installation, and Interference Flow is arranged, have the problems such as the pressure loss and stained probe.Non-intervention measuring technique can not dismantled original pipeline and carries out flow measurement and avoid above shortcoming, can also realize the advantages such as multimetering.But present existing equipment, such as ultrasonic type, expensive and reliability extreme difference, practicality far can not reach the industry spot requirement.Therefore the non-intervention type measuring technique difficulty of gas is larger, there is no at present proven technique and product.The research and development of this technology are significant for industrial development and economical and energy saving.
The present invention propose a kind of can be anti-the outer cluster thermal pulse gas meter of pipe that disturbs of environment temperature, during use, directly install in the outer cluster of pipe, assembly and disassembly conveniently, to commercial production without any interference.In addition, this invents mentioned temperature field measurement mode, can effectively suppress the temperature disturbance of external environment, cooperate efficient self-adaptation pulse heater and heat shield, so that measure consuming time fewly, measurement result meets industry spot accurately and reliably to the measurement requirement of pipeline gas flow.In addition because its hardware cost is low, but large-scale application and realizes that multiple spot detects in industry spot, helps industrial monitoring, reach optimize produce, the purpose of energy-saving and emission-reduction.
Summary of the invention
Purpose of the present invention: provide a kind of industrial gasses pipeline flow that is applied to measure, easy for installation, simple to operate, measure reliable, gas flow surveying instrument cheaply.
Technical scheme of the present invention:
Utilize the method for the feature measurement gas flow of pipeline cycle temperature variation field, its measuring principle is as follows:
A) pipeline of flow measurement is as required selected suitable measurement point, and pipe surface is carried out simple cleaning.The hot face of instrument is close on the tested surface, and fixes with supporting bundling belt.Instrument powers on, and according to the diameter of tested pipeline, sets the cycle T of heating pulse, fully adds for making inner-walls of duct, and the cycle of heating pulse can not be too short, and the numerical value in this cycle is obtained by following formula:
Wherein, k is gain coefficient, and C is the specific heat capacity of pipeline material, and ρ is the density of pipeline material, and λ is the thermal conductivity of pipeline material, and d is the nominal diameter of pipeline.
Instrument is according to the pipe diameter data of input, and the industrial pipeline standard data of storing in the automatic search database finds specific heat capacity, density and the thermal conductivity of corresponding pipeline material.Gain coefficient provides reference value automatically by controller, and this value has determined to measure accuracy consuming time and that measure, is worth littlely, measures sooner, and accuracy is lower, and vice versa.The user can set up on their own according to this reference value.
When b) measuring, add pyroelectric signal to driving circuit (4) by processor (6) transmission, driving hot-fluid valve (14) is heating station, well heater (11) work, water cooled refrigeration device (13) unloading, heat conducts to pipeline outer wall (1) from well heater (11), and pipeline is heated; Then, processor (6) sends the refrigeration electric signal to driving circuit (4), switch hot-fluid valve (14) and be refrigeration station, well heater (11) unloading, water cooled refrigeration device (13) work, heat conducts to well heater (11) from pipeline outer wall (1), and pipeline is cooled.Like this, repeating aforesaid operations has realized along the generation of the Continuous Heat pulse (being the cycle temperature variation field) of pipeline axial direction propagation.
C) be positioned at any temperature sensor (8) of self-adaptation pulse heater (2) upstream and measure temperature, and with measurement data by A/D converter (7), send processor (6) to.
Based on above measured value, select wherein one section effective section of temperature signal curve conduct, comprise three temperature variation cycles, the temperature trend (17) that can obtain reflecting Characteristics of Temperature Field by effective section curve being done linear fit is calculated relative dynamic average f,
Wherein: A is dynamic average, A
0It is 0 o'clock reference value for gas flow.A
bBe temperature trend reference value (18), A
aFor temperature trend added value (19), according to the relation of flow and f,
Q=β·f （3）
And then resolve the flow Q of measurand, and wherein β is flow modificatory coefficient, this coefficient correction is because the deviation of selecting different temperatures signal measurement section to bring.
Advantage of the present invention:
The present invention is directed to industry spot gas flow measurement problem, proposed a kind of can be anti-the outer cluster thermal pulse gas meter of pipe that disturbs of environment temperature, it is as a kind of pipe external pelivimetry means, different being from traditional measurement means maximum: flowmeter need not to access in the pipeline, avoids now the tandem instrument owing to directly contacting all problems that brings with fluid; Take full advantage of the cyclical variation in temperature field, suppress the interference of environment temperature, and calculate in the short period of time corresponding data on flows according to this Characteristics of Temperature Field; Easy to operate, hardware cost is low, and installing/dismounting is convenient.
Description of drawings
Fig. 1 is the structure diagram of flow instrument of the present invention.
1-tested pipeline; 2-self-adaptation pulse heater; 3-heat shield;
4-driving circuit; 5-display panel; 6-processor;
7-A/D converter; 8-temperature sensor;
Fig. 2 is the self-adaptation pulse heater configuration sketch of mentioning among the present invention
9-tested pipeline outer wall; 10-interior heat-conducting silicone grease; 11-well heater;
12-compliant mechanism; 13-water cooled refrigeration device; 14-hot-fluid valve;
15-outer heat-conducting silicone grease;
Fig. 3 is temperature signal (three cycles) the parameter declaration sketch of mentioning among the present invention:
16-actual measurement temperature-time signal; 17-temperature match trend;
18-temperature trend reference value; 19-temperature trend added value;
Embodiment
Below the present invention is further illustrated.
1. self-adaptation pulse heater (2) is characterized in that:
Mainly consisted of by hot-fluid valve (14), well heater (11) and water cooled refrigeration device (13).Hot-fluid valve (14) mainly is comprised of the Peltier semiconductor element, and well heater (11) is that the refrigeration water pipe of ceramic heater assembly, water cooled refrigeration device (4) interts in interior heat-conducting silicone grease (10).This self-adaptation pulse heater can produce periodically variable thermal signal on request.For strengthening the applying degree, there is outer heat-conducting silicone grease (15) hot-fluid valve (14) lower end as hot face as coating.
2. temperature sensor (8) is characterized in that:
Be comprised of platinum resistance thermometer sensor,, and be installed in the upstream extremity of self-adaptation pulse heater (2), relative dynamic average and the flow at this place are proportional.
3. controller is characterized in that:
Controller is made of driving circuit (4), processor (6), display panel (5) and A/D converter (7).After instrument power source is connected, input tested pipeline diameter, set heating cycle (instrument provides preset value), begin subsequently to measure, processor (6) sends electric signal to driving circuit (4), drive hot-fluid valve (14), well heater (11), water cooled refrigeration device (13) work, produce periodically variable thermal signal, temperature sensor (8) is measured the tube wall outside subsequently, by the temperature field behind the airflow influence, and with measurement data by A/D converter (7), send processor (6) to, resolve at last flow, and in the upper display measurement process of display panel (5) and result of calculation.
Claims (2)
- One kind can be anti-the outer cluster thermal pulse gas meter of pipe that disturbs of environment temperature, it is characterized in that: this measurement mechanism binding is installed in pipeline outer wall, it is mainly by self-adaptation pulse heater (2), temperature sensor (8), controller forms; Temperature sensor (8) is installed in the Upstream section of self-adaptation pulse heater (2), temperature field, measuring channel outer wall place, and processor (6) picks up temperature profile to the time dependent curve of measured temperature, resolves gas flow; Self-adaptation pulse heater (2) mainly is comprised of well heater (11), compliant mechanism (12), water cooled refrigeration device (13) and hot-fluid valve (14), and it is attached to pipeline outer wall.
- 2. a kind of outer cluster thermal pulse gas meter of pipe that can anti-environment temperature disturbs described in according to claim 1, it is characterized in that: the well heater (11) in the self-adaptation pulse heater (2), by compliant mechanism (12), connect with hot-fluid valve (14) and pipeline outer wall attaching; Compliant mechanism (12) is regulated the binding face of self-adaptation pulse heater automatically according to the pipeline profile of different tube diameters, and namely the radian of hot face closely is attached on the pipeline outer wall hot-fluid valve (14), has guaranteed sufficient heat transfer.3. a kind of outer cluster thermal pulse gas meter of pipe that can anti-environment temperature disturbs described in according to claim 1, it is characterized in that: the temperature field that self-adaptation pulse heater (2) the generation cycle changes is to be sent by processor (6) to add pyroelectric signal to driving circuit (4), drive hot-fluid valve (14) to the well heater (11) of heating station, water cooled refrigeration device (13) unloading, isochrone array take pipeline axially as the heat transfer direction to pipeline heating; Then, processor (6) sends the refrigeration electric signal to driving circuit (4), switching hot-fluid valve (14) to the station that freezes, simultaneously well heater (11) unloading, water cooled refrigeration device (13) cools off pipeline, this is a circulation, repeats aforesaid operations and has namely produced the temperature field that changes by the cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220004580 CN202693053U (en) | 2012-01-07 | 2012-01-07 | Bundled thermal pulse gas flowmeter outside pipeline and capable of resisting interference of ambient temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220004580 CN202693053U (en) | 2012-01-07 | 2012-01-07 | Bundled thermal pulse gas flowmeter outside pipeline and capable of resisting interference of ambient temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202693053U true CN202693053U (en) | 2013-01-23 |
Family
ID=47548658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220004580 Expired - Fee Related CN202693053U (en) | 2012-01-07 | 2012-01-07 | Bundled thermal pulse gas flowmeter outside pipeline and capable of resisting interference of ambient temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202693053U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10508966B2 (en) | 2015-02-05 | 2019-12-17 | Homeserve Plc | Water flow analysis |
| US10704979B2 (en) | 2015-01-07 | 2020-07-07 | Homeserve Plc | Flow detection device |
-
2012
- 2012-01-07 CN CN 201220004580 patent/CN202693053U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10704979B2 (en) | 2015-01-07 | 2020-07-07 | Homeserve Plc | Flow detection device |
| US10942080B2 (en) | 2015-01-07 | 2021-03-09 | Homeserve Plc | Fluid flow detection apparatus |
| US11209333B2 (en) | 2015-01-07 | 2021-12-28 | Homeserve Plc | Flow detection device |
| US10508966B2 (en) | 2015-02-05 | 2019-12-17 | Homeserve Plc | Water flow analysis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101393148A (en) | Test device for coating heat dispersion and test method thereof | |
| CN102538886B (en) | Extra-pipe binding type thermal pulse gas flowmeter capable of resisting ambient temperature disturbances | |
| CN105067661A (en) | Gas-liquid heat exchanger heat transfer coefficient determination apparatus | |
| CN108020283A (en) | A kind of two-speed probe thermal type gas quality flow meter and its measuring method | |
| CN103868623A (en) | Device and method for measuring temperature of liquid inside pipeline | |
| RU2466365C1 (en) | Self-contained wireless device for measuring temperature of surface of object | |
| CN201289467Y (en) | Device for testing heat dispersion of radiator surface | |
| CN202693053U (en) | Bundled thermal pulse gas flowmeter outside pipeline and capable of resisting interference of ambient temperature | |
| CN204808042U (en) | Novel temperature controller testboard | |
| CN102590274B (en) | System and method used for testing heat conductivity of thin film thermoelectric material | |
| CN102221424A (en) | Calorimeter signal acquisition device, calorimeters and method for computing heating load | |
| CN202502171U (en) | Thermoelectric power generation experimental device based on flowing heat source | |
| CN106769814B (en) | Low-temperature corrosion detection system and detection method thereof | |
| CN200996922Y (en) | Antifouling performance evaluating experimental device | |
| CN204807492U (en) | Solution -air heat exchanger coefficient of heat transfer surveys device | |
| CN202420579U (en) | Flow meter assistant based on non-intervention thermal dynamic measuring principle | |
| CN102305686B (en) | Temperature correction pressure data acquisition device and method for measuring pressure of heat supply network pipeline | |
| CN101393082B (en) | SEER measuring apparatus and method based on common enthalpy difference chamber | |
| CN102128654B (en) | Non-intrusive flow measuring device for industrial gas pipeline | |
| CN105572168A (en) | Thermal type steam dryness meter | |
| CN205373904U (en) | Hot water organ pipe temperature sensor | |
| CN212514361U (en) | Small simulation device for thermal insulation performance of thermal pipeline | |
| CN105843289A (en) | Constant temperature baking oven control system for processing aluminum foil composite heat-insulating material | |
| CN102393227B (en) | Flowmeter aide based on non-intrusive thermal dynamic measurement principle and method for measuring flow measurenment | |
| RU128324U1 (en) | DEVICE FOR METERING OF HEAT ENERGY |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Fan Zichuan Inventor after: Cai Maolin Inventor before: Fan Zichuan |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: FAN ZICHUAN TO: FAN ZICHUAN CAI MAOLIN |
|
| ASS | Succession or assignment of patent right |
Owner name: BEIHANG UNIVERSITY Free format text: FORMER OWNER: CAI MAOLIN Effective date: 20130409 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130409 Address after: 100191 Haidian District, Xueyuan Road, No. 37, Patentee after: Beihang University Address before: 100191 Haidian District, Xueyuan Road, No. 37, Patentee before: Cai Maolin |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20190107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |