CN202171887U - Teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients - Google Patents
Teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients Download PDFInfo
- Publication number
- CN202171887U CN202171887U CN2011202642160U CN201120264216U CN202171887U CN 202171887 U CN202171887 U CN 202171887U CN 2011202642160 U CN2011202642160 U CN 2011202642160U CN 201120264216 U CN201120264216 U CN 201120264216U CN 202171887 U CN202171887 U CN 202171887U
- Authority
- CN
- China
- Prior art keywords
- connecting pipe
- stainless steel
- micron
- steel pipe
- phase
- 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 - Lifetime
Links
- 238000012546 transfer Methods 0.000 title claims abstract description 35
- 238000002474 experimental method Methods 0.000 title claims abstract description 15
- 102000029749 Microtubule Human genes 0.000 title abstract description 5
- 108091022875 Microtubule Proteins 0.000 title abstract description 5
- 210000004688 microtubule Anatomy 0.000 title abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 33
- 239000010935 stainless steel Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000011521 glass Substances 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 15
- 238000000520 microinjection Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000011160 research Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 13
- 230000005514 two-phase flow Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model discloses a teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients. A micro syringe pump is in connection with one inlet of a quick detachable mixed-phase device through a connecting pipe member, and a gas tank is in connection with the other inlet of the quick detachable mixed-phase device through a connecting pipe member; an outlet of the quick detachable mixed-phase device is respectively and sequentially in connection with one end of a glass connecting pipe, a micron order stainless steel pipe, a flow pattern viewer and a connecting pipe member. The periphery of the micron order stainless steel pipe is equipped with a heat insulation black cavity; the inlet end and the outlet end of the stainless steel pipe are equipped with thermocouples, and meanwhile are in connection with two heating leads and a power adjustable type heating unit; an on-line infrared heat detector is provided at a corresponding position of the stainless steel pipe. The thermocouples are in connection with a computer through a data acquisition unit, and the on-line infrared heat detector and the power adjustable type heating unit are in connection with the computer. The teaching experiment apparatus is suitable for teaching experiments, takes two-phase convective heat transfer in the stainless steel pipe as a research object, has the characteristics of simple operation, high precision and good stability and can realize remote teaching.
Description
Technical Field
The utility model relates to a measure double-phase convection heat transfer coefficient field, especially relate to a measure teaching experiment device of double-phase convection heat transfer coefficient of microtubule.
Background
The flowing working condition of gas-liquid two-phase fluid is often encountered in the industries of power, chemical industry, nuclear energy, refrigeration, petroleum, metallurgy and the like. There are also two-phase fluid heat transfer problems in these industrial equipment with heat exchange. For example, the flow and heat transfer problems of a gas-liquid two-phase fluid have been widely experienced in various boiling tubes, various gas-liquid mixers, gas-liquid separators, various heat exchangers, rectification columns, chemical reaction equipment, various condensers, and other equipment in nuclear power plants and thermal power stations. The heat transfer coefficient of gas-liquid two-phase fluid convection reflects the heat exchange capacity between the fluid and the solid surface, and the physical meaning of the heat transfer coefficient is that when the temperature difference between the fluid and the solid surface is 1K, the unit of the heat transferred per unit wall surface area in unit time is W/(m)2K). Since the flow pattern of the gas-liquid two-phase is complex, the heat transfer process is greatly affected, and compared with a single-phase fluid, the research on the gas-liquid two-phase heat transfer process is more difficult. For students in the chemical industry, it is important to understand and master the measuring method of the convective heat transfer coefficient of the two-phase fluid and various knowledge of the heat transfer of the two-phase fluid, and to economically and reliably develop, design and operate the above-mentioned industrial equipment.
In recent years, with the wide application of micro-scale technology in the pharmaceutical industry, high heat flux heat exchangers, condensing equipment and the like, two-phase flow and heat transfer characteristics in microchannels have attracted more and more attention. The research of gas-liquid relative flow heat transfer in the micro-pipeline provides important cold mould experimental data for the design and development of micro heat transfer equipment and micro reactors. Particularly, the method plays a vital role in developing a strong exothermic gas-liquid reaction micro-pipeline reactor, improving the reaction safety, optimizing the reaction route and the like. However, due to the diversity of two-phase flow patterns and the complexity of the heat transfer process, it has not been well studied. The irregularity of the two-phase flow wall temperature change causes that the traditional thermocouple measurement method cannot well describe the wall temperature distribution in the whole range, and other temperature measurement means are needed.
The laboratory has less equipment for measuring the two-phase convective heat transfer coefficient, and mainly aims at the glass round tube with the conventional size, compared with the stainless steel round tube, the two-phase convective heat transfer characteristic is more meaningful for industrial production. So far, aiming at teaching experiment application, two-phase convective heat transfer coefficient equipment which takes two-phase convective heat transfer in a stainless steel tube as a research object and has simple operation, high precision and good stability is not reported.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, provide a teaching experiment device of measuring double-phase convection heat transfer coefficient of microtubule.
The teaching experiment device for measuring the two-phase convective heat transfer coefficient of the microtube comprises a high-precision micro-injection pump, a pressure gauge, a gas storage tank, a first connecting pipe fitting, a second connecting pipe fitting, a flowmeter, a quick detachable phase mixer, a constant-temperature water bath, a glass connecting pipe, a first sealing element, a heat-insulating black cavity, a micron-sized stainless steel pipe, a 50-micron K-type thermocouple at an inlet end, a power-adjustable heating unit, an online infrared heat detector, a data acquisition unit, an extraction opening, a 50-micron K-type thermocouple at an outlet end, a second sealing element, a flow pattern observer, a third connecting pipe fitting, a liquid storage tank and a computer; the micro-injection pump is connected with a first inlet of the quick detachable phase mixer through a first connecting pipe fitting, the gas storage tank is connected with a second inlet of the quick detachable phase mixer through a second connecting pipe fitting, an outlet of the quick detachable phase mixer is sequentially connected with one end of a glass connecting pipe, a micron-sized stainless steel pipe, a flow pattern observer and one end of a third connecting pipe fitting, a liquid storage tank is arranged below the other end of the third connecting pipe fitting, a heat insulation black cavity is arranged outside the micron-sized stainless steel pipe, the micron-sized stainless steel pipe is provided with a 50 micron K-type thermocouple at an inlet end and a 50 micron K-type thermocouple at an outlet end, meanwhile, the micro-injection pump is connected with two heating wires and is connected with a power adjustable heating unit, an online infrared heat detector is arranged at the corresponding position of the micron-sized stainless steel pipe, a first sealing element and a second sealing element are respectively arranged between the, the quick detachable blender is equipped with the constant temperature water bath outward, is equipped with the extraction opening on the adiabatic black cavity, and entrance point 50 microns K type thermocouple, exit end 50 microns K type thermocouple pass through data acquisition unit and link to each other with the computer, and online infrared thermal detector links to each other with power adjustable type heating unit and computer.
The pipe diameter of the micron-sized stainless steel pipe is 0.1mm-1.5 mm. The flow pattern observer is made of glass materials, a plurality of circular channels with different inner diameters of 0.1mm-1.5mm are axially formed in the periphery of the flow pattern observer, and a central shaft of the flow pattern observer is fixed on the outer wall of the heat insulation black cavity.
The utility model aims at the difficult point of microtubule two-phase convection heat transfer coefficient measurement, combines teaching needs, adopts the online infrared heat detector to measure the temperature of the outer wall surface, has no influence on the heat exchange process due to non-contact measurement, has high response speed and convenient installation, can accurately describe the temperature of any infinitesimal section of the outer wall surface, and obtains a continuous temperature distribution curve; the inner diameter of the phase mixer can be changed according to the requirement by adopting the quick detachable phase mixer, so that the flow pattern of the two-phase flow is changed, and the disassembly and the assembly are convenient; the flow pattern observer can solve the problem that the stainless steel pipe cannot judge the flow state in the pipe, and the flow pattern observer can ensure that the flow pattern in the stainless steel pipe is consistent with that in the flow pattern observer by matching with micron-sized stainless steel pipes with different pipe diameters; the RS232 protocol module is connected with a computer, the size, time and mode of power output of the power supply are controlled by the computer, the temperature of the inlet and outlet fluid and the temperature of the wall surface are observed in real time, and remote teaching can be realized.
Drawings
FIG. 1 is a schematic structural diagram of a teaching experimental device for measuring the two-phase convective heat transfer coefficient of a microtube;
in the figure, a high-precision micro-injection pump 1, a pressure gauge 2, a gas storage tank 3, a first connecting pipe fitting 4, a second connecting pipe fitting 5, a flow meter 6, an easily detachable phase mixer 7, a constant-temperature water bath 8, a glass connecting pipe 9, a first sealing element 10, a heat-insulating black cavity 11, a micron-sized stainless steel pipe 12, an inlet-end 50-micrometer K-type thermocouple 13, a power-adjustable heating unit 14, an online infrared heat detector 15, a data acquisition unit 16, an extraction opening 17, an outlet-end 50-micrometer-K-type thermocouple 18, a second sealing element 19, a flow pattern observer 20, a third connecting pipe fitting 21, a liquid storage tank 22 and a computer 23 are arranged in the vacuum cavity.
FIG. 2 is a flow chart of a teaching experiment device for measuring the two-phase convective heat transfer coefficient of the microtube.
Detailed Description
As shown in fig. 1, the teaching experiment device for measuring the two-phase convective heat transfer coefficient of the microtube comprises a high-precision micro-injection pump 1, a pressure gauge 2, a gas storage tank 3, a first connecting pipe 4, a second connecting pipe 5, a flowmeter 6, an easily detachable phase mixer 7, a constant-temperature water bath 8, a glass connecting pipe 9, a first sealing element 10, a heat-insulating black cavity 11, a micron-sized stainless steel pipe 12, a 50-micron K-type thermocouple 13 at an inlet end, a power-adjustable heating unit 14, an online infrared heat detector 15, a data acquisition unit 16, an air extraction opening 17, a 50-micron K-type thermocouple 18 at an outlet end, a second sealing element 19, a flow pattern observer 20, a third connecting pipe 21, a liquid storage tank 22 and a computer 23; the micro-injection pump 1 is connected with a first inlet of a quick-detachable phase mixer 7 through a first connecting pipe fitting 4, the gas storage tank 3 is connected with a second inlet of the quick-detachable phase mixer 7 through a second connecting pipe fitting 5, an outlet of the quick-detachable phase mixer 7 is sequentially connected with a glass connecting pipe 9, a micron-sized stainless steel pipe 12, a flow pattern observer 20 and one end of a third connecting pipe fitting 21, a liquid storage tank 22 is arranged below the other end of the third connecting pipe fitting 21, a heat insulation black cavity 11 is arranged outside the micron-sized stainless steel pipe 12, an inlet end 50 micron K-shaped thermocouple 13 and an outlet end 50 micron K-shaped thermocouple 18 are arranged on the micron-sized stainless steel pipe 12, two heating wires are connected with a power adjustable heating unit 14, an online infrared heat detector 15 is arranged at a position corresponding to the micron-sized stainless steel pipe 12, and a first sealing element 10, a second sealing element, A second sealing piece 19 is arranged, a pressure gauge 2 is arranged on the gas storage tank 3, a flowmeter 6 is connected to the second connecting pipe fitting 5, a constant temperature water bath 8 is arranged outside the quick detachable phase mixer 7, an air suction opening 17 is arranged on the heat insulation black cavity 11, an inlet end 50 micrometer K-shaped thermocouple 13 and an outlet end 50 micrometer K-shaped thermocouple 18 are connected with a computer 23 through a data acquisition unit 16, and an online infrared heat detector 15 and a power adjustable heating unit 14 are connected with the computer 23.
The pipe diameter of the micron-sized stainless steel pipe 12 is 0.1mm-1.5 mm. The flow pattern observer 20 is made of glass materials, a plurality of circular channels with different inner diameters of 0.1mm-1.5mm are axially formed in the periphery of the flow pattern observer, the central shaft of the flow pattern observer 20 is fixed on the outer wall of the heat insulation black cavity (11), and the flow pattern observer 20 is rotated to be matched with the micron-sized stainless steel tubes 12 with different tube diameters, so that students can observe flow pattern changes conveniently.
The power adjustable heating unit comprises a constant current heating source, an RS232 protocol module and a computer; the constant current heating source is connected with the RS232 protocol module, and the RS232 protocol module is connected with the computer. The online infrared heat detector 15 can detect the axial continuous temperature distribution of the outer wall surface of the micron-sized stainless steel tube 12. The quick detachable phase mixer 7 can change the size to change the two-phase flow pattern according to the requirement.
As shown in fig. 2, the power adjustable heating unit is connected to a computer through an RS232 protocol module, and the computer controls the output current, time and output mode; the output signal of the two-phase flow convection heat transfer detection unit is processed by the data acquisition unit and then input into the computer.
The teaching experiment device for measuring the two-phase convective heat transfer coefficient of the microtube has the following data processing method:
according to the input current of the direct current power supply and the resistance of the stainless steel micro-tube in the heating section, the input power can be calculated, and the formula is as follows:
wherein
In order to input the power, the power supply is,in order to input a current, the current is,
is a resistance of a stainless steel micro-tube of a heating section.
Therefore, the power per unit area of the micro-pipe can be obtained as follows:
wherein
Is the input power per unit area of the micro-pipe,is the inner diameter of the micro-pipe,
the length of the heating segment of the micro-pipeline is determined.
Local outer wall face temperature is surveyed through online infrared heat detector, because local internal face temperature is difficult for measuring, we adopt one-dimensional heat conduction hypothesis, can obtain local inner face temperature and be:
（3）
wherein,
is the temperature of the local inner wall surface,
is the temperature of the local outer wall surface,
the unit volume input power of the micro-pipeline,
is the heat conductivity coefficient of the micro-pipeline material,
is the outer diameter of the micro-pipe.
Due to the flow characteristics of the two-phase flow, the local wall temperature changes with the change of time, and the average wall temperature data of about 15 minutes is generally taken as the temperature value at the point for calculation.
Local fluid temperature
Can be measured through an inlet and an outletThe fluid temperature is obtained by linear interpolation calculation, and the average temperature of about 15 minutes is also taken as the actual temperature.
The input power of unit area, the local inner wall surface temperature and the local fluid temperature are obtained by the measurement, and the local convection heat transfer coefficient of the two-phase flow of the micro-pipeline can be calculated according to the definition of the convection heat transfer coefficient:
Claims (3)
1. A teaching experiment device for measuring two-phase convective heat transfer coefficients of a microtube is characterized by comprising a high-precision micro-injection pump (1), a pressure gauge (2), a gas storage tank (3), a first connecting pipe fitting (4), a second connecting pipe fitting (5), a flowmeter (6), an easily-detachable phase mixer (7), a constant-temperature water bath (8), a glass connecting pipe (9), a first sealing element (10), a heat-insulating black cavity (11), a micron-sized stainless steel pipe (12), a 50-micrometer-sized K-shaped thermocouple (13) at an inlet end, a power-adjustable heating unit (14), an online infrared heat detector (15), a data acquisition unit (16), an air suction port (17), a 50-micrometer-sized K-shaped thermocouple (18) at an outlet end, a second sealing element (19), a flow pattern observer (20), a third connecting pipe fitting (21), a liquid storage tank (22); a micro injection pump (1) is connected with a first inlet of a quick-detachable phase mixer (7) through a first connecting pipe fitting (4), a gas storage tank (3) is connected with a second inlet of the quick-detachable phase mixer (7) through a second connecting pipe fitting (5), an outlet of the quick-detachable phase mixer (7) is connected with a glass connecting pipe (9), a micron-sized stainless steel pipe (12), a flow pattern observer (20) and one end of a third connecting pipe fitting (21) in sequence, a liquid storage tank (22) is arranged below the other end of the third connecting pipe fitting (21), a heat insulation black cavity (11) is arranged outside the micron-sized stainless steel pipe (12), an inlet end 50 micron K-type thermocouple (13) and an outlet end 50 micron K-type thermocouple (18) are arranged on the micron-sized stainless steel pipe (12), two heating wires are connected and connected with a power-adjustable heating unit (14), and an online infrared heat detector (15) is arranged at the corresponding position of the micron-sized, first sealing elements (10) and second sealing elements (19) are arranged between two ends of a micron-sized stainless steel pipe (12) and a heat-insulating black cavity (11) respectively, a pressure gauge (2) is arranged on a gas storage tank (3), a flow meter (6) is connected to a second connecting pipe fitting (5), a constant-temperature water bath (8) is arranged outside a quick-detachable phase mixer (7), an air suction opening (17) is formed in the heat-insulating black cavity (11), an inlet end 50-micrometer K-type thermocouple (13) and an outlet end 50-micrometer K-type thermocouple (18) are connected with a computer (23) through a data acquisition unit (16), and an online infrared thermal detector (15) is connected with a power-adjustable heating unit (14) and the computer (23).
2. The teaching experiment device for measuring the two-phase convective heat transfer coefficient of the microtube according to claim 1, wherein the diameter of the micron-sized stainless steel tube (12) is 0.1mm to 1.5 mm.
3. The teaching experiment device for measuring the two-phase convective heat transfer coefficient of the microtube as claimed in claim 1, wherein the flow pattern observer (20) is made of glass material, a plurality of circular channels with different inner diameters of 0.1mm to 1.5mm are axially arranged on the periphery, and the central shaft of the flow pattern observer (20) is fixed on the outer wall of the heat-insulating black cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202642160U CN202171887U (en) | 2011-07-25 | 2011-07-25 | Teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202642160U CN202171887U (en) | 2011-07-25 | 2011-07-25 | Teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202171887U true CN202171887U (en) | 2012-03-21 |
Family
ID=45830078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202642160U Expired - Lifetime CN202171887U (en) | 2011-07-25 | 2011-07-25 | Teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202171887U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411863A (en) * | 2011-07-25 | 2012-04-11 | 浙江大学 | Teaching experiment device for measuring two-phase convective heat transfer coefficient of micro-tube |
| CN105136848A (en) * | 2015-09-16 | 2015-12-09 | 北京邮电大学 | Convective heat transfer coefficient and convective mass transfer coefficient test device and method |
-
2011
- 2011-07-25 CN CN2011202642160U patent/CN202171887U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411863A (en) * | 2011-07-25 | 2012-04-11 | 浙江大学 | Teaching experiment device for measuring two-phase convective heat transfer coefficient of micro-tube |
| CN102411863B (en) * | 2011-07-25 | 2013-06-05 | 浙江大学 | Teaching experimental apparatus for measuring two-phase convective heat-transfer coefficient of micropipe |
| CN105136848A (en) * | 2015-09-16 | 2015-12-09 | 北京邮电大学 | Convective heat transfer coefficient and convective mass transfer coefficient test device and method |
| CN105136848B (en) * | 2015-09-16 | 2017-12-22 | 北京邮电大学 | Convection transfer rate, convective transfer coefficient test device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102135511B (en) | Method and device for testing heat transfer performance of fin surface of plate-fin heat exchanger | |
| CN105067661B (en) | Gas liquid exchanger heat transfer coefficient determining device | |
| Jiang et al. | Convection heat transfer of CO2 at supercritical pressures in a vertical mini tube at relatively low Reynolds numbers | |
| Naphon | Effect of coil-wire insert on heat transfer enhancement and pressure drop of the horizontal concentric tubes | |
| CN102411863A (en) | Teaching experiment device for measuring two-phase convective heat transfer coefficient of micro-tube | |
| CN101113963A (en) | Method and device for measuring liquid thermal conductivity factor | |
| CN203758764U (en) | Heat exchanger integrated comprehensive performance testing system | |
| CN207123505U (en) | The compact sheet heat exchanger heat exchange surface local flow heat-transfer character measurement apparatus of diffusion welding (DW) | |
| CN102095749A (en) | Device and method for measuring parameters of gas-liquid two-phase flow in micro-pipes based on thermal measurement method | |
| Singh et al. | Pilot plant study for effective heat transfer area of coiled flow inverter | |
| Meyer et al. | Inlet tube spacing and protrusion inlet effects on multiple circular tubes in the laminar, transitional and turbulent flow regimes | |
| CN202171887U (en) | Teaching experiment apparatus for measuring microtubule two-phase convective heat transfer coefficients | |
| Vukić et al. | Effect of segmental baffles on the shell-and-tube heat exchanger effectiveness | |
| Mandal et al. | Augmentation of heat transfer performance in coiled flow inverter vis-à-vis conventional heat exchanger | |
| CN103868558B (en) | A kind of powder flow on-line detecting system and method | |
| CN102507640A (en) | Shear rate-variable liquid heat transfer coefficient measuring device and method | |
| CN206531655U (en) | A kind of heat exchanger energy efficiency detection device | |
| CN102110387B (en) | Teaching experimental device for measuring convective heat-transfer coefficient of micro-pipe | |
| CN204807492U (en) | Solution -air heat exchanger coefficient of heat transfer surveys device | |
| KR101651538B1 (en) | Design method for a heat exchanger | |
| CN110927199A (en) | Indoor experimental device for high-temperature scaling of crude oil heat exchanger | |
| Murugesan et al. | The Experimental Study on Enhanged heat Transfer Performance in Plate Type Heat Exchanger | |
| CN203688009U (en) | Heat absorbing piece of Coriolis mass flow meter | |
| CN201181284Y (en) | Steam dryness measurer | |
| CN203798393U (en) | Online powder flow detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120321 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |