CN87208077U - Circular pipe form heat conduction measuring unit for thermal insulation material - Google Patents
Circular pipe form heat conduction measuring unit for thermal insulation material Download PDFInfo
- Publication number
- CN87208077U CN87208077U CN 87208077 CN87208077U CN87208077U CN 87208077 U CN87208077 U CN 87208077U CN 87208077 CN87208077 CN 87208077 CN 87208077 U CN87208077 U CN 87208077U CN 87208077 U CN87208077 U CN 87208077U
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- pipe
- measuring
- insulation material
- tube
- heat conduction
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- Expired - Lifetime
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Abstract
The utility model relates to the measuring device of the thermal conductivity coefficient of circular tube type heat-insulating material, which is composed of the measuring tube of a heater, a thermocouple, and heat-insulating material. The both ends of the measuring tube in the measuring device are respectively processed with 17 rows of interstice which is not communicated mutually, and each row of interstice is divided into four equal divisions on a circumference and is not communicated mutually. The center of contiguous two interstice is corresponding to the shaft center of a thiele tube, which is the angle of the 45 DEG of the phase difference of a rotation shaft. Thus, the heat transmission pathways on the both ends of the measuring tube is in a labyrinth shape, which increases thermal resistance on the both ends of the thiele tube, and enables the temperature of the middle part of the measuring tube to even. The utility model is adopted to measure the thermal conductivity coefficient of the circular tube type heat-insulating material, which not only has a few using devices, but also has the advantages of simple operation and high measuring precision.
Description
The utility model belongs to the technical field that the heat conduction of tubulose insulation material is measured in the hot physics.
Usually in the mensuration of pipe shape performance of heat protective material, what extensively adopt is " protection termination type " device, and the heat transfer performance of pipe shape insulation material is measured as canonical form with the device of this structure, but use this device, exist following problem always:
1. this device has three well heaters, and one of them is adjustable metering well heater, and two other is the protection well heater that can regulate power respectively, and its effect is to reduce axial thermal conductivity, so this device needs three power supplys that can regulate power separately.
2. require when measuring (also to play equal heat effect at the mensuration pipe, claim Thiele tube again) metering section and shield segment between the space temperature difference transfer to certain limit and keep time enough to stablize under the constant situation and carry out, this not only requires reliable and stable regulated power supply, but also requirement has the professional of the thermal technology aspect of certain operating experience and skill, through supervision and adjusting just can be finished for a long time.
3. this device mensuration pipe length overall is 1 meter, and it measures section is 0.6 meter, is consideration tubulose insulation material transverse joint increase heat radiation, and influences the mensuration of heat conductivility, and its 1 meter long length still dislikes not enough.
The determinator that also has a kind of being called " ideal type " in addition, this determinator has only a well heater, measure the Guan Shangwu space, during mensuration, get and measure middle " isothermal region " (being that the relative middle of axial temperature difference part is less than centesimal section) of pipe for measuring section, though this device is measured two of pipe insulation material is arranged all, but still have a lot of heat radiations, owing to measure the high thermal conductivity of pipe, the termination thermal loss that axial thermal conductivity causes is bigger, the measurement result of its coefficient of heat conductivity often deviation is bigger, in order to proofread and correct this deviation, also will carry out complicated calculating or demarcation.Therefore, on present mensuration to pipe shape insulation material, there are the complicated and not high problem of mensuration precision of means of testing respectively in above-described protection type and ideal type determinator, are unfavorable for promoting and use.
The purpose of this utility model is exactly the problem at above existence, gets its strong point, reforms its weak point, has manufactured and designed a kind of pipe shape insulation material heat conduction determinator, and this device is not only simple in structure, and optional equipment is less, and the precision of measuring is higher.
Determinator of the present utility model is on the basis of former " ideal type " pipe determinator, have the gap (1) of many rows with measuring on the tube wall of managing two along the axial array of pipe, every row gap is quartern form on the circumference of pipe, they do not communicate each other, and axially the center of adjacent two interspaces is that rotating shaft differs miter angle with the axle center of measuring pipe each other, make the axial thermal conductivity approach of measuring pipe be " labyrinth-like ", the approach that is heat conduction is to walk around every row gap along measuring pipe two, and is outwards circuitous.In these gaps, fill up thermal insulation material water glass aluminium oxide, and behind sintering, form an integral body.On the outer wall of 7.5 centimetres and 22.5 centimeters a pair of thermopair is installed respectively in range determination tube hub both sides, these four pairs of thermopairs are arranged along pipe week with spiral line type, be that the adjacent two thermopair relative determination tubular axis hearts are that rotating shaft differs an angle of 90 degrees, they are buried in the sulculus that the mensuration tube outer surface is opened vertically, fill and lead up with the water glass alumina powder then.In addition, a heating tube is installed in measuring pipe, heating tube is that outside surface has the spiral fluted alumina tube, is wound with resistance wire in helicla flute, and two of heating tube is being measured on the inside pipe wall with endcap support.
Adopt pipe heat conduction determinator of the present utility model, its advantage is, make labyrinth-like owing to will measure the hot pipeline at pipe two, the axial thermal conductivity hot-fluid must make a circulation outwards to transmit in this labyrinth, its result causes on the one hand the axial thermal conductivity xsect being reduced, the distance lengthening that hot-fluid is transmitted, thus increased axial thermal conduction resistance, make the temperature of measuring tube-surface more even, the precision as a result of measurement is higher.Adopt this device to carry out pipe heat conduction and measure, not only equipment is simple, and (needing only one group of well heater, a power supply) is simple to operate, the reliability height, and greatly improved measuring accuracy.
Fig. 1 is the structural representation that the utility model is measured pipe.
Fig. 2 is the A-A face cut-open view that the utility model is measured pipe, and Fig. 3 is a B-B face cut-open view.
Specific embodiment of the utility model is as follows:
Measure pipe and adopt the 1Cr18Ni9Ti stainless steel material, the external diameter of pipe is 89 millimeters, 4 millimeters of thickness of pipe, pipe range is 1800 millimeters, is processed with 17 row gaps respectively at two of measuring pipe, 6 millimeters of every row's relief widths, distance between adjacent two gaps also is 6 millimeters, every row gap is divided into four five equilibriums on pipe, do not communicate each other, and the center relative determination tubular axis heart in adjacent two gaps is that rotating shaft differs miter angle.In these gaps, fill up thermal insulation material water glass aluminium oxide, sinter an integral body at last into.On the outer wall of measuring 7.5 centimetres of tube hub both sides and 22.5 centimeters, a pair of thermopair is installed respectively, these four pairs of thermopairs distribute along pipe week with spiral line type, the axle center that is adjacent two thermopair relative determinations is that rotating shaft differs an angle of 90 degrees, and be embedded in and measure in the sulculus that tube outer surface opens vertically, fill and lead up with the water glass alumina powder then.Heating tube is placed on the inside of measuring pipe, and heating tube adopts outside surface that the spiral fluted alumina tube is arranged, and heater strip is in the helicla flute of this pipe, and its two uses endcap support on the inwall of measuring pipe.During test,, measure the pipe two ends, just can carry out heat conduction and measure with alumina fibre or glass wool insulation as long as test specimen is wrapped on the mensuration pipe.According to the above, just can make pipe heat conduction determinator of the present utility model.
Claims (2)
1, the determinator of a kind of ideal type pipe shape insulation material heat conduction, formed by measuring pipe, thermopair, heating arrangement and insulation material, it is characterized in that being processed with respectively on the tube wall at described mensuration pipe two gap axial evenly distributed, that do not communicate to each other (1) at pipe, every row gap (1) is the quartern and distributes on the circumference of measuring pipe, do not communicate each other yet, axially the center of adjacent two interspaces (1) is that rotating shaft differs miter angle with the axle center of measuring pipe each other, makes the axial thermal conductivity approach of measuring pipe be labyrinth-like.
2,, it is characterized in that filling up thermal insulation material water glass aluminium oxide in the gap (1) at described mensuration pipe two, and form an integral body through sintering and mensuration pipe according to the described determinator of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208077 CN87208077U (en) | 1987-05-13 | 1987-05-13 | Circular pipe form heat conduction measuring unit for thermal insulation material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208077 CN87208077U (en) | 1987-05-13 | 1987-05-13 | Circular pipe form heat conduction measuring unit for thermal insulation material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87208077U true CN87208077U (en) | 1988-02-17 |
Family
ID=4823415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87208077 Expired - Lifetime CN87208077U (en) | 1987-05-13 | 1987-05-13 | Circular pipe form heat conduction measuring unit for thermal insulation material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87208077U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713013A (en) * | 2014-01-20 | 2014-04-09 | 核工业理化工程研究院 | Device for testing axial heat conduction coefficient of tubular material |
| CN103743778A (en) * | 2014-01-22 | 2014-04-23 | 核工业理化工程研究院 | Device for testing radial heat conductivity coefficient of tubular material |
| CN106226351A (en) * | 2016-09-23 | 2016-12-14 | 西安交通大学 | A kind of thin-wall circular tube material thermal conductivity computational methods |
-
1987
- 1987-05-13 CN CN 87208077 patent/CN87208077U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713013A (en) * | 2014-01-20 | 2014-04-09 | 核工业理化工程研究院 | Device for testing axial heat conduction coefficient of tubular material |
| CN103713013B (en) * | 2014-01-20 | 2015-09-23 | 核工业理化工程研究院 | Test tubulose material shaft is to the device of coefficient of heat conductivity |
| CN103743778A (en) * | 2014-01-22 | 2014-04-23 | 核工业理化工程研究院 | Device for testing radial heat conductivity coefficient of tubular material |
| CN106226351A (en) * | 2016-09-23 | 2016-12-14 | 西安交通大学 | A kind of thin-wall circular tube material thermal conductivity computational methods |
| CN106226351B (en) * | 2016-09-23 | 2019-10-11 | 西安交通大学 | A kind of thin-wall circular tube material thermal conductivity calculation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |