CN101514968A - Heat current densimeter - Google Patents
Heat current densimeter Download PDFInfo
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- CN101514968A CN101514968A CNA2009100213435A CN200910021343A CN101514968A CN 101514968 A CN101514968 A CN 101514968A CN A2009100213435 A CNA2009100213435 A CN A2009100213435A CN 200910021343 A CN200910021343 A CN 200910021343A CN 101514968 A CN101514968 A CN 101514968A
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- copper pipe
- heat flow
- flow density
- thermopair
- density meter
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Abstract
The invention relates to the field of heat energy power engineering measurement, in particular to a densimeter for measuring heat current under high temperature and high pressure. A heat current densimeter comprises a thermocouple, a copper pipe and connection line conductors. The heat current densimeter is characterized in that the copper pipe is a tubular structure with a closed end and an opening end; the pipe wall and the end of the pipe wall are all provided with holes; each hole is internally provided with at least one thermocouple; each conducting wire which is connected with the tail of the thermocouple is led out of the opening end of the copper pipe; and the external wall of the copper pipe is provided with a fixing device. The heat current densimeter can bear the working environment under high temperature and high pressure, and the heat current densimeter can measure liquid temperature synchronously and has smaller error of obtained heat transfer coefficient after the measurement.
Description
Technical field
The present invention relates to thermal power engineering survey field, particularly a kind of heat flow density meter of measuring under the high-temperature high-pressure state.
Background technology
In a lot of occasions of thermal power engineering, need to measure the heat when carrying out heat interchange between fluid and solid wall surface, and then can carry out heat to the situation of being heated of solid wall surface and analyze and deeper thermal-stress analysis.For example in reactor coolant loop, there are many ozzles, can inject some fluids to system by these ozzles, there is greatest differences in the temperature of the temperature of the fluid of these injections and internal system fluid, so these ozzles will bear huge frequent thermal shock.And the theoretical analysis that will determine such thermal shock and calculating just must understand this moment fluid and the ozzle solid wall surface between heat interchange.Be difficult to obtain the local heat flow density and the coefficient of heat transfer for the method for such complex flow process, so must adopt the method for measuring to determine heat flow density by Theoretical Calculation.And this surveying instrument can be operated under the high-temperature high-pressure state usually, therefore needs to develop the heat flow density meter that can work under the high-temperature and high-pressure conditions.Similarly measuring process also is found in the middle of the multiple thermal powerplant such as boiler-steam dome.
For the measurement of heat flow density, because the needs of industrial development begin to have relevant instrument and equipment to occur very early.At present, the gauging instrument of measuring the solid wall surface heat flow density is a lot, as the measurement of heat flow density in the burner hearth wall in the measurement of building walls internal heat flows density, the industrial furnace.Patent 200610028865.4 has provided a kind of on-the-spot detection method of building wall heat transfer coefficient, it is used normal power demifacet thermal source by heating arrangement and opertaing device thereof to tested body of wall and carries out constant heating, in tested zone, form the even hot-fluid of a local stable state, body of wall is detected under the steady heat transfer state of manual construction.Patent 200410026343.1 has provided the measuring method of building masonry wall heat transfer coefficient equally, also be to utilize artificial method to cause hot-fluid in the body of wall, by the temperature sensor measurement temperature variation of pasting to obtain heat flow density.200620091887.0 of patents provide a kind of device of measuring solid interface contact heat exchange coefficient, and this device in fact also is by measuring along the temperature difference at direction of heat flow different distance place and then obtaining heat flow density and the coefficient of heat transfer.Patent 200610009794.3 has provided a kind of apparatus and method that can be applied to measure in superhigh temperature, forceful electric power, the big flow field environment that disturbs heat flow density.
From the measuring principle angle, the measurement of heat flow density all is by measuring the temperature variation along different distance place on the direction of heat flow, obtaining heat flow density by the heat conduction theory problem more basically.But along with the difference of application scenario can be to heat flow density in respect of different requirements.For some complex environments, as flowing in the High Temperature High Pressure tested pipeline, it is just very difficult along the heat flow density of tested pipeline wall thickness direction transmission to want to measure high-temperature, high pressure fluid, if further will try to achieve the local coefficient of heat transfer, the pacing of will seeking common ground measures the near wall temperature of fluid.For this complicated situation, above-mentioned several heat flow density meters all can not be suitable for.
Summary of the invention
Can't satisfy the situation that heat flow density is measured under the high-temperature high-pressure state at surveying instrument of the prior art, the object of the present invention is to provide a kind of simple in structure, can be applicable to measure the heat flow density when carrying out heat interchange between tested pipeline inner fluid and tube wall under the high-temperature and high-pressure conditions and the heat flow density meter of the coefficient of heat transfer, and densitometer of the present invention can the synchro measure fluid temperature (F.T.).
To achieve these goals, the technical solution used in the present invention is:
A kind of heat flow density meter comprises thermopair, and copper pipe connects lead; Copper pipe is the tubular structure of end sealing other end opening, end with tube wall on tube wall is provided with the hole, be provided with thermopair in the hole, each lead that is connected with the thermopair afterbody is drawn from opening one end of copper pipe, and the outer wall of described copper pipe is provided with stationary installation.
Described thermopair has at least in the Kong Bingcong hole by the copper pipe end and stretches out.The end of described thermopair is not higher than the outer contour of the tube wall of copper pipe.The lead mutually insulated of the afterbody of described thermopair must not twist winding.Described thermopair is at least one.
Use the method for melting welding to be connected between described thermopair and the copper pipe.Described copper pipe is a copper tube.
Described copper pipe end profile line is perpendicular to the copper pipe axis or be symmetrical in the copper pipe axis.
The stationary installation that is provided with on the described copper pipe comprises: lower bottom base, clip, cutting ferrule.
Heat flow density meter of the present invention can bear the working environment of High Temperature High Pressure, and described heat flow density meter can the synchro measure fluid temperature (F.T.), and the error of the coefficient of heat transfer that measures is littler.
Description of drawings
Fig. 1 is body copper tube of the present invention and thermopair synoptic diagram;
Fig. 2 is a clamping hoop type coupling arrangement synoptic diagram of the present invention
Fig. 3 is the present invention and stationary installation connection diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 1, the body of heat flow density meter is by copper tube 2, and thermopair 1-a, 1-b, 1-c, 1-d constitute.The shell of this heat flow density meter is the red copper bar of a hollow, use the centre-drilling hole of precision finishing machine to red copper bar, make it form the tubular structure of an inner hollow, one end of this copper pipe 2 is a closed state, and described copper tube 2 ends 7 outline lines are perpendicular to the copper pipe axis or be symmetrical in the copper pipe axis.Be drilled with the aperture of φ 1.5mm in copper pipe 2 sides far from end 4mm, 8mm, 12mm place respectively, be drilled with the aperture of same size in copper pipe end 7 equally.3 thermocouple wires are penetrated the aperture of copper pipe 2 sidepieces, the end that makes thermopair 1-a, 1-b, 1-c is the outer wall outline line of outstanding copper pipe 2, each lead 3 that is connected with thermopair 1-a, 1-b, 1-c, 1-d afterbody is drawn from opening one end of copper pipe 2, lead 3 mutually insulateds of the afterbody of thermopair 1-a, 1-b, 1-c, 1-d must not twist winding.Be arranged at the thermopair 1-d that measures fluid temperature (F.T.) in copper pipe end 7 and stretch out 7 outer 1mm of copper pipe end by aperture.Mode by melting welding makes this aperture sealing, and each thermocouple wire also is connected as a single entity because of melting welding and copper pipe.
The clamping hoop type coupling arrangement of heat flow density meter such as Fig. 2, shown in Figure 3.Screw thread cutting ferrule 4 is connected with lower bottom base 6 by helicitic texture, and clip 8 is positioned at the cone of lower bottom base 6 oral areas.When installing and using, be drilled with a hole at tested pipeline 9 inwalls, the lower bottom base 6 of coupling arrangement is welded in the tested pipeline outer wall, the top of lower bottom base 6 is provided with external thread.Measuring copper tube 2 is penetrated in the hole, make that measurement copper pipe 2 ends 7 are concordant substantially with tested pipeline 9 inwalls.To go up screw thread cutting ferrule 4 and lower bottom base 6 again by being threaded, the clip 8 between last screw thread cutting ferrule 4 and lower bottom base 6 constantly screws under the effect at screw thread, can tightly oppress copper tube 2, finishes the sealing to copper tube 2.Clip 8 also uses the red copper material to make, and can guarantee that like this it still can compress copper tube under high temperature action, makes the copper tube sealing intact.
Owing to, just have corresponding hot-fluid transmission in measurement copper tube 2 axial inner during use along being provided with 1 or a plurality of thermocouple wire on copper pipe 2 axial directions at least.So just the temperature variation that can utilize thermocouple measurement to obtain records along the size of the heat flow density of copper pipe transmission.It is to stretch out outside the copper tube by the hole of copper tube end 7 that a thermocouple wire is arranged.After measuring copper pipe 2 and being installed in tested pipeline 9 walls by stationary installation, the fluid temperature (F.T.) that described thermopair can synchro measure goes out to flow through herein.Definition according to the Fourier heat conduction law and the fluid coefficient of heat transfer just can record this place's coefficient of heat transfer like this.Because all being the modes by melting welding, described thermocouple wire is connected with copper tube, and make the aperture place seal by welding technology, can bear the high pressure of 20MPa, can not occur leaking through test melting welding aperture under the pressure of 20MPa, described heat flow density meter is fixed by the clamping hoop type stationary installation, can be applied under the complex conditions of High Temperature High Pressure.
After the body of heat flow density meter is carried out, be connected with tested pipeline 9 walls by the clamping hoop type coupling arrangement.The heat flow density meter must contact the just corresponding heat flow density of energy measurement and the coefficient of heat transfer with tested pipeline 9 internal flows, must guarantee that tested pipeline 9 inner fluids can not leak by described heat flow meter, particularly when tested pipeline 9 internal pressures are higher; This connected mode must be born the test of hot environment, and the present invention adopts the clamping hoop type connection to make this heat flow meter can bear high pressure also can bear high temperature.
During work hot-fluid along copper tube by end 7 to the opening transmission, measure the temperature that the thermopair that is provided with in the copper pipe perceives the diverse location place, can measure heat flow density, and then the fluid coefficient of heat transfer that goes out of synchro measure.During concrete the application, all thermocouple signals can be measured corresponding heat flow density and convection transfer rate all by the real-time data acquisition system acquisition process when physical phenomenon takes place.
Claims (9)
1, a kind of heat flow density meter, comprise thermopair, copper pipe (2), connect lead (3), it is characterized in that: copper pipe (2) is the tubular structure of end sealing other end opening, and the end (7) with tube wall on tube wall is provided with the hole, is provided with thermopair (1-a, 1-b, 1-c, 1-d) in the hole, draw from opening one end of copper pipe with each lead (3) that thermopair (1-a, 1-b, 1-c, 1-d) afterbody is connected, the outer wall of described copper pipe (2) is provided with stationary installation.
2. heat flow density meter according to claim 1 is characterized in that: have at least in the Kong Bingcong hole by the copper pipe end in the described thermopair (1-a, 1-b, 1-c, 1-d) and stretch out.
3. heat flow density meter according to claim 2 is characterized in that: the end of described thermopair (1-a, 1-b, 1-c) is not higher than the outer contour of the tube wall of copper pipe (2).
4. heat flow density meter according to claim 2 is characterized in that: lead (3) mutually insulated of the afterbody of described thermopair (1-a, 1-b, 1-c, 1-d), must not twist winding.
5. heat flow density meter according to claim 4 is characterized in that: described thermopair is at least one.
6. heat flow density meter according to claim 1 is characterized in that: use the method for melting welding to be connected between described thermopair (1) and the copper pipe (2).
7. heat flow density meter according to claim 1 is characterized in that: described copper pipe (2) is a copper tube.
8. heat flow density meter according to claim 1 is characterized in that: described copper pipe (2) end (7) outline line is perpendicular to the copper pipe axis or be symmetrical in the copper pipe axis.
9. heat flow density meter according to claim 1 is characterized in that: described copper pipe (2) is gone up the stationary installation that is provided with, and comprising: lower bottom base (6), clip (8), cutting ferrule (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100213435A CN101514968B (en) | 2009-03-03 | 2009-03-03 | Heat current densimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100213435A CN101514968B (en) | 2009-03-03 | 2009-03-03 | Heat current densimeter |
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| Publication Number | Publication Date |
|---|---|
| CN101514968A true CN101514968A (en) | 2009-08-26 |
| CN101514968B CN101514968B (en) | 2011-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100213435A Expired - Fee Related CN101514968B (en) | 2009-03-03 | 2009-03-03 | Heat current densimeter |
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| CN (1) | CN101514968B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879129A (en) * | 2012-08-22 | 2013-01-16 | 国核华清（北京）核电技术研发中心有限公司 | Heat flux density measurement device and method |
| CN103728337A (en) * | 2012-10-12 | 2014-04-16 | 国核华清（北京）核电技术研发中心有限公司 | Hot-fluid density probe for measuring hot-fluid density of object interior and measuring method |
| CN105043596A (en) * | 2015-04-23 | 2015-11-11 | 清华大学 | High-temperature heat-flow meter with built-in pads |
| CN105509913A (en) * | 2014-09-23 | 2016-04-20 | 国家核电技术有限公司 | Thermocouple multi-point temperature measurement device and simulated pressure reactor comprising same |
| CN106525900A (en) * | 2016-11-10 | 2017-03-22 | 清华大学 | Water-cooled flame intensity measuring device |
| CN106644134A (en) * | 2017-02-06 | 2017-05-10 | 天津大学 | Temperature measurement device of tube-and-shell heat exchanger tube pass fluid |
| CN108088579A (en) * | 2017-12-22 | 2018-05-29 | 中国航天空气动力技术研究院 | A kind of combined type heat-flow density sensor and measuring method based on stratification temperature response |
| CN108344521A (en) * | 2018-03-14 | 2018-07-31 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of transient heat flow sensor |
| CN109211724A (en) * | 2017-07-08 | 2019-01-15 | 北京工标传感技术有限公司 | A kind of tuning fork densitometer |
| CN110836725A (en) * | 2018-08-16 | 2020-02-25 | 哈尔滨工业大学 | Double-probe heat flow meter in high heat flow coupling environment and method for measuring heat flow density thereof |
-
2009
- 2009-03-03 CN CN2009100213435A patent/CN101514968B/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879129B (en) * | 2012-08-22 | 2016-01-20 | 国核华清（北京）核电技术研发中心有限公司 | A kind of thermal flow density measuring device and method |
| CN102879129A (en) * | 2012-08-22 | 2013-01-16 | 国核华清（北京）核电技术研发中心有限公司 | Heat flux density measurement device and method |
| CN103728337A (en) * | 2012-10-12 | 2014-04-16 | 国核华清（北京）核电技术研发中心有限公司 | Hot-fluid density probe for measuring hot-fluid density of object interior and measuring method |
| CN105509913A (en) * | 2014-09-23 | 2016-04-20 | 国家核电技术有限公司 | Thermocouple multi-point temperature measurement device and simulated pressure reactor comprising same |
| CN105043596A (en) * | 2015-04-23 | 2015-11-11 | 清华大学 | High-temperature heat-flow meter with built-in pads |
| CN106525900A (en) * | 2016-11-10 | 2017-03-22 | 清华大学 | Water-cooled flame intensity measuring device |
| CN106525900B (en) * | 2016-11-10 | 2018-11-30 | 清华大学 | A kind of water-cooled flame intensity measuring device |
| CN106644134A (en) * | 2017-02-06 | 2017-05-10 | 天津大学 | Temperature measurement device of tube-and-shell heat exchanger tube pass fluid |
| CN109211724B (en) * | 2017-07-08 | 2023-09-19 | 北京工标传感技术有限公司 | Tuning fork densimeter |
| CN109211724A (en) * | 2017-07-08 | 2019-01-15 | 北京工标传感技术有限公司 | A kind of tuning fork densitometer |
| CN108088579A (en) * | 2017-12-22 | 2018-05-29 | 中国航天空气动力技术研究院 | A kind of combined type heat-flow density sensor and measuring method based on stratification temperature response |
| CN108088579B (en) * | 2017-12-22 | 2023-10-10 | 中国航天空气动力技术研究院 | Combined type heat flux density sensor based on layered temperature response and measuring method |
| CN108344521A (en) * | 2018-03-14 | 2018-07-31 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of transient heat flow sensor |
| CN108344521B (en) * | 2018-03-14 | 2024-04-16 | 中国空气动力研究与发展中心超高速空气动力研究所 | Transient heat flow sensor |
| CN110836725B (en) * | 2018-08-16 | 2021-02-12 | 哈尔滨工业大学 | Double-probe heat flow meter in high heat flow coupling environment and method for measuring heat flow density thereof |
| CN110836725A (en) * | 2018-08-16 | 2020-02-25 | 哈尔滨工业大学 | Double-probe heat flow meter in high heat flow coupling environment and method for measuring heat flow density thereof |
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| Publication number | Publication date |
|---|---|
| CN101514968B (en) | 2011-07-27 |
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Granted publication date: 20110727 Termination date: 20140303 |